Stain removal device

Abstract

A stain removal device, a head portion having a beating surface; a vibration unit which is located on an extension line of an axis of the head portion orthogonal to the beating surface and vibrates the head portion in an axis direction through driving of a solenoid actuator; and a liquid supply unit which has a liquid accommodating portion capable of accommodating liquid and supplies the liquid in the liquid accommodating portion to the beating surface through vibration of the head portion generated by the vibration unit.

Claims

1. A stain removal device, comprising: a head portion, formed with a beating surface; a vibration unit, which is located on an extension line of an axis of the head portion orthogonal to the beating surface and vibrates the head portion in an axis direction through driving of a solenoid actuator; a liquid supply unit, which has a liquid accommodating portion capable of accommodating liquid and supplies the liquid in the liquid accommodating portion to the beating surface through vibration of the head portion generated by the vibration unit; a main body housing, wherein the head portion protrudes from a front end portion of the main body housing; and a cover portion, detachably arranged at the front end portion of the main body housing, wherein a changing portion is formed on the main body housing and the cover portion, and is operative to change a length of the cover portion protruding from the front end portion of the main body housing within a range of an operating stroke of the solenoid actuator; wherein the changing portion comprises: a convex portion extending to the axis direction that is formed at one of the front end portion of the main body housing and a basal end portion of the cover portion; a first concave portion that has a depth configured for substantially clamping the entire convex portion and a second concave portion that is shallower than the first concave portion, the first concave portion and the second concave portion being formed at the other of the front end portion of the main body housing and the basal end portion of the cover portion; wherein the convex portion is operative to be clamped with the first concave portion or the second concave portion so as to change a protruding length of the cover portion.

2. The stain removal device according to claim 1, comprising: a main body housing, wherein the head portion protrudes from a front end portion of the main body housing; and a plurality of cover portions, which are detachably arranged at the front end portion of the main body housing and have different lengths in the axis direction within a range of an operating stroke of the solenoid actuator, wherein the stain removal device is used in such a state that any of the plurality of cover portions is mounted at the front end portion of the main body housing.

3. The stain removal device according to claim 2, wherein the solenoid actuator imparts an attraction force away from a direction of the head portion to a movable iron core; and the vibration unit has a link mechanism which is operative to cause the head portion to protrude in a direction opposite to a displacement direction of the movable iron core.

4. The stain removal device according to claim 1, wherein an elastically deformable claw portion is formed at one of the front end portion of the main body housing and the basal end portion of the cover portion; and a buckling portion buckled with the claw portion is formed at a position, at which the convex portion is clamped with the concave portion, of the other of the front end portion of the main body housing and the basal end portion of the cover portion.

5. The stain removal device according to claim 4, wherein the solenoid actuator imparts an attraction force away from a direction of the head portion to a movable iron core; and the vibration unit has a link mechanism which is operative to cause the head portion to protrude in a direction opposite to a displacement direction of the movable iron core.

6. The stain removal device according to claim 1, wherein the solenoid actuator imparts an attraction force away from a direction of the head portion to a movable iron core; and the vibration unit has a link mechanism which is operative to cause the head portion to protrude in a direction opposite to a displacement direction of the movable iron core.

7. A stain removal device, comprising: a head portion, formed with a beating surface; a vibration unit, which is located on an extension line of an axis of the head portion orthogonal to the beating surface and vibrates the head portion in an axis direction through driving of a solenoid actuator; a liquid supply unit, which has a liquid accommodating portion capable of accommodating liquid and supplies the liquid in the liquid accommodating portion to the beating surface through vibration of the head portion generated by the vibration unit; a main body housing, wherein the head portion protrudes from a front end portion of the main body housing; and a cover portion, detachably arranged at the front end portion of the main body housing, wherein a changing portion is formed on the main body housing and the cover portion, and is operative to change a length of the cover portion protruding from the front end portion of the main body housing within a range of an operating stroke of the solenoid actuator; wherein the changing portion comprises: a screw portion formed on an outer circumferential surface of one of the main body housing and the cover portion; and a nut portion corresponding to the screw portion that is formed on an inner circumferential surface of the other of the main body housing and the cover portion; wherein the protruding length of the cover portion is operative to be changed by increasing or decreasing a screw-in quantity of the screw portion screwed into the nut portion.

8. The stain removal device according to claim 7, wherein the solenoid actuator imparts an attraction force away from a direction of the head portion to a movable iron core; and the vibration unit has a link mechanism which is operative to cause the head portion to protrude in a direction opposite to a displacement direction of the movable iron core.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a diagram illustrating an appearance of a stain removal device of an embodiment of the present disclosure.

(2) FIG. 2 is a longitudinal section view illustrating a same stain removal device in such a state that a cover member is removed.

(3) FIG. 3 is a front view illustrating a liquid accommodating portion and a protective cover portion in a state of being removed from a main body housing constituting a same stain removal device.

(4) FIG. 4 is a stereogram illustrating a vibration unit constituting a same stain removal device.

(5) FIG. 5 is a diagram illustrating a vibration unit constituting a same stain removal device.

(6) FIG. 6 is a decomposition stereogram illustrating a member constituting a same vibration unit.

(7) FIG. 7 is a longitudinal section view illustrating a vibration state of a same stain removal device.

(8) FIG. 8 is a diagram illustrating a variation example of the present disclosure.

(9) A list of reference numerals:

(10) 4: Vibration unit; 5, 5x and 5y: Protective cover (cover portion); 5a: Basal end portion of protective cover; 5a1: First concave portion; 5a2: Second concave portion; 5c: Buckling portion; 11: Head portion; 12: Liquid accommodating portion; 20: Liquid supply unit; 21a: Beating surface; 33 and 33: Main body housing; 33b and 33c: Front end portion of main body housing; 33c1: Convex portion; 33c2: Claw portion; 40: Link mechanism; 41: Solenoid actuator; 41a: Movable iron core; 100: Stain removal device; A: Changing portion; S: Axis of head portion.

DETAILED DESCRIPTION

(11) Hereinafter, an embodiment of the present disclosure will be described with reference to drawings.

(12) FIG. 1 is a front view illustrating an appearance of a stain removal device 100 according to an embodiment of the present disclosure. FIG. 2 is a longitudinal section view illustrating the stain removal device 100 of the present embodiment. FIG. 3 is a front view illustrating a liquid accommodating portion 12 and a protective cover portion 5 in a state of being removed from a man body housing 33 constituting the same stain removal device of the present embodiment.

(13) As shown in FIG. 2, the stain removal device 100 has a device body 1, a cover member 6 and a protective cover (guide device) 5.

(14) The device body 1 includes a head portion 11, a liquid supply unit 20, a vibration unit 4, a battery 32, and a bottomed cylindrical main body housing 33 in which these components are assembled.

(15) The head portion 11 has a beating portion 21 and a head inserting portion 22. The beating portion 21 is a component which has a beating surface 21a and has a substantially semicircular longitudinal section, and more specifically, a component slightly more similar to a circle than a semicircle. Such a head portion 11 is located at a center of an end surface of the main body housing 33.

(16) The head inserting portion 22 is a component which is extended from the beating portion 21 and is detachably inserted into an inserted portion 25 described later. A side surface of the head inserting portion 22 has a plurality of annular protruding portions not shown in figures and separately formed in the vibration direction. When the head inserting portion 22 is inserted to the inserted portion 25, an inner surface of the inserted portion 25 is pressed by the protruding portions, so as to stably fix the head portion 11 to the inserted portion 25 without changing a fixation degree even if assembly and disassembly are performed repeatedly.

(17) It should be noted that, although the head portion 11 is made of resin (for example, nylon) in the present embodiment, the material is not limited to the resin and can also be metal (for example, Stainless Used Steel: sus) and the like.

(18) The liquid supply unit 20 as shown in FIG. 2 and FIG. 3 includes the liquid accommodating portion (a water bottle) 12 and a water supply path 13.

(19) The liquid accommodating portion 12 includes a liquid storing portion 24 and the inserted portion 25. The liquid storing portion 24 is a transparent or semitransparent hollow component capable of accommodating the liquid. A cover member 24a is mounted at the front end portion of the head portion 11 side in a screw-fixing manner. The liquid can be accommodated in the liquid accommodating portion 12 by removing the cover member 24a. In addition, the liquid storing portion 24 is formed so that a portion in the axis direction has a small radial direction, and a clamping concave portion 12a capable of being clamped with a clamping claw 45b (referring to FIG. 4 and the like) described later is arranged. A cylindrical water supply hole 28 conically opened toward the head portion 11 is formed in such a liquid storing portion 24. The liquid in the liquid storing portion 24 flows down through the water supply path 13 from the cylindrical water supply hole 28 and then is supplied to the beating surface 21a.

(20) The inserted portion 25 is extended from the liquid storing portion 24. The head inserting portion 22 of the head portion 11 is detachably inserted into the inserted portion 25 by pressing lightly. It should be noted that the head inserting portion 22 is not limited to be inserted into the inserted portion 25 in a pressing manner and can also be inserted in a screw-fixing manner.

(21) Water, a detergent mixture obtained by mixing water with detergent at a certain ratio, a common solvent such as ethanol, gasoline, etc., a special detergent for removing stains or the like can be used as the liquid herein. In the present embodiment, only water can be used as the liquid accommodated in the liquid storing portion 24.

(22) As shown in FIG. 2, the water supply path 13 is formed from the liquid storing portion 24 to the beating surface 21a through the head portion 11. The liquid in the liquid accommodating portion 12 is provided to the beating surface 21a of the head portion 11. A small-diameter portion 27c having a flow path cross section smaller than that of other portions is partially formed on the water supply path 13.

(23) The liquid dripped from the liquid storing portion 24 is retained in such a water supply path 13. When the head portion 11 is vibrated, the water supply path 13 discharges a little amount of liquid slowly (for example, 1-1.5 cc/min) to the beating surface 21a of the head portion 11 at a stable flow rate. On the other hand, when the head portion 11 is not vibrated, particularly in the small-diameter portion 27c, the liquid is prevented from dripping by surface tension.

(24) The vibration unit 4 shown in FIG. 2 is located on an extension line of an axis S of the head portion 11 orthogonal to the beating surface 21a and vibrates the head portion 11 protruding more than the front end portion 33b of the main body housing 33 to the axis direction by an opening 33a through driving of a solenoid actuator (41) using electric power of a battery 32. The battery 32 is a rechargeable battery in the present embodiment and is accommodated in the main body housing 33 via an opening/closing cover not shown in figures and partially formed on the main body housing 33. Hereinafter, the axis direction of the head portion 11 is sometimes referred to as a vibration direction. In addition, in the vibration direction, a direction in which the head portion 11 protrudes outward the device is referred to as a protruding direction Z1, and an opposite direction thereof is referred to as a returning direction Z2. In addition, a vertical direction on paper in FIG. 2 is referred to as a first direction Y. Further, a direction orthogonal to the vibration direction and the first direction Y is referred to as a second direction X.

(25) The solenoid actuator 41 has a movable iron core 41a. The movable iron core 41a is moved to the vibration direction by being alternately switched to ON or OFF by energizing a coil not shown in figures. An axis of the movable iron core 41a is arranged on the extension line of the axis S of the head portion 11. A specific structure of the vibration unit 4 for vibrating the head portion 11 will be described later.

(26) The cover member 6 can be assembled and disassembled from the front end portion 33b of the main body housing 33 and is removed from a device body 1 as shown in FIG. 2 when the stain removing operation described later is performed. In addition, the cover member 6 is mounted on the device body 1 when the stain removal device 100 is carried, and can effectively prevent water leakage outside the device, impact on the head portion 11 and the like.

(27) The protective cover 5 as the cover portion is a non-flexible and substantially cylindrical transparent member made of resin, is located at a position surrounding the side surface of the head portion 11, as shown in FIG. 2, and is detachably mounted at the front end portion 33b of the main body housing 33. The length (height) of the protective cover 5 is set so that an action end of the head portion 11 in the protruding direction Z1 slightly protrudes beyond a protruding end 51 of the protective cover 5 when the movable iron core 41a is moved at a maximum operating stroke.

(28) By providing such a protective cover 5, the protective cover 5 can shield the liquid scattered by the vibration of the head portion 11 during the stain removing operation described later so as to prevent the liquid from diffusing in a wide range. Therefore, an area of a wetted portion of clothes C can be reduced; and the clothes C can be worn immediately after the stain removing operation.

(29) Such a stain removal device 100 may be a handheld-sized device capable of partially washing the clothes C as the stain removing object. When the stain removing operation is performed, an absorption pad P as a pad is abutted below the stain portion sp of the clothes C; and a stain removing detergent is directly coated on the stain portion of the clothes C. Moreover, the stain removal device 100 is used in such a manner that the protruding end 51 of the protective cover 5 is pressed on the clothes C at a position where the beating surface 21a of the head portion 11 is opposite to the stain portion sp. It should be noted that the detergent can also be not used at this time.

(30) When a power switch Sw is operated in the state, the solenoid actuator 41 vibrates the head portion 11 by the driving force of the movable iron core 41a linearly moved in the axis direction through power supply driving from the battery 32, and imparts the beating force to the stain portion sp by the beating surface 21a.

(31) When the device body 1 is moved along the clothes C and such an action is repeated, the liquid (water in the present embodiment) supplied to the stain portion sp is dissolved together with the detergent coated to the stain portion sp to form the dirt of the stain portion sp; and the dirt is beaten out of the clothes C and is absorbed by the absorption pad P. Namely, the stain removal device 100 transfers the dirt of the clothes C as well as the liquid and the detergent to the absorption pad P by applying the beating force so as to remove the stains.

(32) It should be noted that the absorption pad P is not particularly limited, various articles can be used as long as the liquid absorption speed is high, and for example, a product after folding kitchen paper can be used.

(33) The stain removal device 100 described above includes: the head portion 11 having the beating surface 21a; a vibration unit 4 which is located on the extension line of the axis S of the head portion 11 orthogonal to the beating surface 21a and vibrates the head portion 11 in the axis direction through the driving of the solenoid actuator 41; and a liquid supply unit 20 which has the liquid accommodating portion 12 capable of accommodating liquid and supplies the liquid in the liquid accommodating portion 12 to the beating surface 21a through the vibration of the head portion 4 generated by the vibration unit 4.

(34) When such a structure is adopted, since the vibration unit 4 vibrates the head portion 11 by the driving of the solenoid actuator 41 and supplies the liquid in the liquid accommodating portion 12 to the beating surface 21a of the head portion 11 from the liquid supply unit 20, the head portion 11 can automatically perform the action of beating the clothes C as the stain removing object, thereby playing high stain removing effect without rapid movement. In addition, since the driving force in a straight-line direction of the solenoid actuator 41 is used for the vibration of the head portion 11, it is unnecessary to install a gear and other speed reduction conversion mechanisms for converting a rotating force of a motor into a force in the straight-line direction, for example, as a case that the motor is used as a driving source. Therefore, the stain removal device 100 can reduce the number of components, simplify the structure, greatly reduce a diameter of the main body housing 33, and realize compactness.

(35) Thus, the stain removal device 100 of the present embodiment has good compactness and portability. When residual food stains, cosmetics and the like are attached to the cloth product outside, the stains may be not apparent by using partial washing. In addition, curtains, carpets and other articles not easy to be washed integrally can be cleaned partially and appropriately. Further, the stain removal device 100 can also be suitable for pre-washing the dirt at the collar, cuffs and other parts of the clothes C at an early stage of washing with a washing machine.

(36) FIG. 4 is a stereogram illustrating the vibration unit 4. FIG. 5(a) is a side view illustrating the vibration unit 4. FIG. 5 (b) is a front view illustrating constituent elements of the vibration unit 4. FIG. 6 is a decomposition stereogram illustrating the constituent elements of the vibration unit 4. FIG. 7 is a diagram for illustrating an action performed to vibrate the head portion 11. Hereinafter, the structure of the vibration unit 4 is described in detail with reference to FIG. 4 to FIG. 7.

(37) As shown in FIG. 5(b), the vibration unit 4 has the solenoid actuator 41 described above, a coil spring 46, the link mechanism 40 and a piston 45.

(38) As shown in FIG. 4 to FIG. 6, the link mechanism 40 includes a solenoid connecting portion 42, a link portion 43 and a piston fixing portion 44.

(39) As shown in FIG. 6, the solenoid connecting portion 42 includes: a fixed side base portion 42a which is a plate-like member substantially parallel to the beating surface 21a shown in FIG. 2; protruding direction extended protruding portions 42b respectively extending from two end portions of the fixed side base portion 42a in the first direction Y to the protruding direction Z1; and a clamping pin 42d penetrating through a long hole 42c described later. A circular iron core through opening 42e penetrated by the movable iron core 41a embedded into the coil spring 46 is formed in a central portion of the fixed side base portion 42a. In addition, the long hole 42c penetrated by the clamping pin 42d and extending to the vibration direction is formed in a central portion in the second direction X of each protruding direction extended protruding portion 42b. A first annular groove 42f is formed in the inner surface of each protruding direction extended protruding portion 42b in the second direction X. Second clamping protrusions 43g and 43h of a first link member 43a and a second link portion 43b described later are movably clamped in the first annular grooves 42f.

(40) As shown in FIG. 6, the link portion 43 includes the first link member 43a and a second link member 43b. The first link member 43a and the second link member 43b have a substantially same shape, and have a thickness exceeding the diameter of the movable iron core 41a in the first direction Y.

(41) A pair of clamping pieces 43c and 43c separated from each other in the first direction Y is formed at an end portion 43c of the first link member 43a close to the second link member 43b. Pin through holes 43c1 penetrated by the clamping pin 42d are respectively formed in the pair of clamping pieces 43c and 43c. In addition, first clamping protrusions 43d1 reversely protruding to each other in the first direction Y are formed at another end portion 43d of the first link member 43a. Further, second clamping protrusions 43g parallel to the first clamping protrusions 43d1 and reversely protruding to each other are formed at the central portion in a long side direction of the first link member 43a.

(42) A pair of clamping pieces 43e and 43e formed with the pin through holes 43e1 are also formed at an end portion 43e of the second link member 43b close to the first link member 43a. First clamping protrusions 43f1 reversely protruding to each other in the first direction Y are formed at another end portion 43f of the second link member 43b. In addition, second clamping protrusions 43h reversely protruding to each other are formed at the central portion in the long side direction of the second link member 43b.

(43) A pin through hole 41b is formed in an end portion in the protruding direction Z1 of the movable iron core 41a. The movable iron core 41a is inserted into the solenoid connecting portion 42 via the iron core through hole 42e. The vicinity of the pin through hole 41b is clamped by the clamping pieces 43c and 43c of the first link portion and the clamping pieces 43e and 43e of the second link portion 43b from the second direction X. At this time, one of the clamping pieces 43c and 43c of the first link portion is inserted between the pair of clamping pieces 43e and 43e of the second link portion 43b; and the other of the clamping pieces 43c and 43c of the first link portion is inserted outside the pair of clamping pieces 43e and 43e of the second link portion 43b.

(44) The clamping pin 42d penetrates the pin through holes 43c1 and 43e1 respectively formed in the clamping pieces 43c and 43c of the first link portion and the clamping pieces 43e and 43e of the second link portion 43b, as well as the pin through hole 41b of the movable iron core 41a, which are overlapped with each other. In addition, two end portions of the clamping pin 42d are inserted into the long hole 42c of the solenoid connecting portion 42 so as to be clamped with the long hole 42c.

(45) When the coil spring 46 is wound on the movable iron core 41a, one end of the coil spring 46 is abutted against the clamping pin 42d, and the other end of the coil spring 46 is abutted against (or approaches) a solenoid body 41c shown in FIG. 5(c) and is accommodated between the clamping pieces 43c and 43c (43e and 43e). As a result, the movable iron core 41a is connected with the link members 43a and 43b by the clamping pin 42d.

(46) The piston fixing portion 44 includes a movable side base portion 44a which is a plate-like member substantially parallel to the beating surface 21a shown in FIG. 2; returning direction extended protruding portions 44b respectively extending from four corners of the movable side base portion 44a to the returning direction Z2; and a piston covering portion 44c extending from four sides of the movable side base portion 44a to the protruding direction Z1. As shown in FIG. 6, when the movable iron core 41a is protruded to the protruding direction Z1, an opening 44d from which the clamping pieces 43c and 43c of the link portion 43 partially enters is formed in the central portion of the movable side base portion 44a. Second annular grooves 44e are formed in the inner surfaces of the returning direction extended protruding portions 44b in the second direction X. The first clamping protrusions 43d1 and 43f1 respectively formed on the first link member 43a and the second link member 43b are clamped with the second annular grooves 44e in a manner of freely moving in the grooves.

(47) Notches 44g cut in the returning direction Z2 are formed in multiple positions of the piston covering portion 44c. As shown in FIG. 4, the piston covering portion 44c is clamped with a piston-fixed portion 45c extending from a bolt holding portion 45a of the piston 45 described later to the outer side of the circumferential direction through the notch 44g. In addition, fixed connecting holes 44f and 45d (referring to FIG. 5(b)) are formed in the piston covering portion 44c and the piston-fixed portion 45c in the first direction Y. The piston fixing portion 44 and the piston 45 are fixed to each other by inserting bolts and the like not shown in figures into the fixed connecting holes 44f and 45d in such a state that the end portions of the piston covering portion 44c and the bolt holding portion 45a on a returning direction Z2 side are embedded.

(48) The piston 45 shown in FIG. 4 and FIG. 5 supports the liquid accommodating portion 12 in such a manner that the beating surface 21a (referring to FIG. 2) is located at the front end, can be moved to the vibration direction, and includes a bottle body holding portion 45a and the piston-fixed portion 45c.

(49) The bottle body holding portion 45a is a component which is opened toward the head portion 11 and is of a bottomed substantially cylindrical shape. The clamping claw 45b capable of clamping the liquid accommodating portion 12 is arranged on the side surface of the bottle body holding portion 45a. The clamping claw 45b is configured to be elastically deformed toward the outer side of the bottle body holding portion 45a due to the pressing from the liquid accommodating portion 12 with the assembly and disassembly. Therefore, the liquid accommodating portion 12, on one hand, is clamped to the clamping claw 45b by the clamping concave portion 12a (referring to FIG. 3) in a manner of being inserted into the bottle body holding portion 45a and, on the other hand, can be pulled out of the bottle body holding portion 45a by being grasped by the inserted portion 25 or the vicinity thereof and is pulled to the protruding direction Z1 by a certain force.

(50) Herein, as shown in FIG. 7, the solenoid actuator 41 is a non-through type solenoid actuator of which one end of the returning direction Z2 side is blocked, and is configured as a single-acting solenoid actuator which is stopped when the movable iron core 41a is moved to be abutted against the solenoid body 41c and pulls the movable iron core 41a up to the returning direction Z2 when a coil not shown in figures is energized. When the movable iron core 41a is subjected to the attraction force toward the returning direction Z2, the clamping pin 42d is moved to the returning direction Z2 along the long hole 42c. Moreover, one end portion 43c of the first link member 43a and one end portion 43e of the second link member 43b inserted into the clamping pin 42d are moved to the returning direction Z2. Therefore, the other end portion 43d of the first link member 43a and the other end portion 43f of the second link member 43b shown in FIG. 6 transfer a force toward the protruding direction Z1 to the second annular grooves 44e by the first clamping protrusions 43d1 and 43f1. As shown in FIG. 7(a), the piston fixing portion 44 and the piston 45 are integrally protruded to the protruding direction Z1. The head portion 11 is protruded to a position slightly protruding beyond a protruding end 5 of the protective cover 5. At this time, a gap L is formed in the vibration direction between the fixed side base portion 42a of the solenoid connecting portion 42 and the returning direction extended protruding portion 44b of the piston fixing portion 44. In addition, the coil spring 46 is pressed between the clamping pin 42d and the solenoid body 41c to accumulate an elastic force.

(51) Then, when the energization to the solenoid actuator 41 is switched to OFF, a force toward the protruding direction Z1 is imparted to the clamping pin 42d by the elastic force of the coil spring 46. Thus, the first link member 43a, the second link member 43b and the movable iron core 41a inserted into the clamping pin 42d as shown in FIG. 6 are moved to the protruding direction Z1. The other end portion 43d of the first link member 43a and the other end portion 43f of the second link member 43b transfer the force toward the returning direction Z2 to the second annular grooves 44e by the first clamping protrusions 43d1 and 43f1. Thus, the coil spring 46 is used for releasing (returning) the movable iron core 41a; even if the stain removal device 100 is used in an inclination state for example, as shown in FIG. 7(b), the piston fixing portion 44 and the piston 45 are integrally and reliably moved to the returning direction Z2; and the head portion 11 is lifted to a specified size (about 5 mm in the present embodiment). Then, the fixed side base portion 42a of the solenoid connecting portion 42 and the returning direction extended protruding portion 44b of the piston fixing portion 44 are abutted against each other, or the movement toward the protruding direction Z1 of the movable iron core 41a is stopped.

(52) The head portion 11 is vibrated (amplitude movement) by repeating such an action.

(53) Herein, when the solenoid actuator 41 gives the movable iron core 41a a direction away from the head portion 11, i.e., the attraction force toward the returning direction Z2, the solenoid actuator 41 plays the strongest force when the movable iron core 41a is pulled up to the returning direction Z2. Therefore, the vibration unit 4 can protrude (push out) the head portion 11 when the movable iron core 41a is attracted to the returning direction Z2 by having the link mechanism 40 capable of protruding the head portion 11 to a direction opposite to the displacement direction of the movable iron core 41a, and can enhance the beating force.

(54) In the present embodiment, a plurality of protective covers 5 and 5x having different vibration direction lengths (heights) mounted within the range of the operating stroke of the solenoid actuator 41 can be replaced at the front end portion 33b of the main body housing 33.

(55) After the beating surface 21a of the head portion 11 is abutted against, for example, the clothes C placed on a table, even if in the range of the operating stoke of the solenoid actuator 41, the pull-up of the movable iron core 41a is mechanically stopped in the middle, so the operating stroke of the movable iron core 41a is shortened. Therefore, when the protective cover is replaced with a protective cover 5x having the vibration direction length, for example, about 2 mm, shorter than that of the protective cover 5, as shown in FIG. 7 (c), the movable iron core 41a is stopped in the middle before being pulled up to a position abutting against the solenoid body 41c, so the pulling size of the solenoid actuator 41 does not reach the maximum. Then, the movable iron core 41a is pushed out of the position described above, as shown in Fig. (d), to the protruding direction Z1 by the coil spring 46. Thus, the operating stroke of the solenoid actuator 41 is shortened. The beating force imparted to the clothes C by the head portion 11 becomes weaker (smaller) compared with the case that the protective cover 5 is used.

(56) In this way, when the protective cover 5 is used for maximizing the pulling size of the solenoid actuator 41, the operating stroke is, for example, about 4 mm, and the beating force becomes strong. On the other hand, when the protective cover 5x is used and the pulling size does not reach the maximum, the operating stroke is, for example, 2 mm, and the beating force becomes weak.

(57) With adoption of such a structure, a distance from the front end portion 33b of the main body housing 33 to the clothes C can be changed by replacing the protective covers 5 and 5x mounted on the main body housing 33, without electrically switching the solenoid actuator 41; and the operating stroke of the solenoid actuator 41 can be changed mechanically. When the operating stroke is electrically adjusted by such as a control base plate 34 and the like in order to adjust the beating force, the number of the components and the size of the device may be increased, but the device can be miniaturized by adopting a structure capable of replacing a plurality of protective covers 5 and 5x having different mounting lengths; and the strength of the beating force applied to the clothes C by the head portion 11 can be adjusted.

(58) In the present embodiment, further, when an operation button (a switching portion) 33d (referring to FIG. 1) is operated, an action frequency of the solenoid actuator 41 is changed by the control base plate 34 (referring to FIG. 2) configured at a position adjacent to the battery 32; and the vibration speed (beating speed) of the head portion 11 can be changed. Thus, the strength and speed of the beating force can be adjusted correspondingly to the type of the clothes C. For example, multiple washing modes, such as gentle washing with a weak beating force and a low speed, strong washing with a strong beating force and a high speed and the like can be realized.

(59) Although one embodiment of the present disclosure is described above, specific structures of various parts are not limited to the embodiments described above.

(60) For example, although the present embodiment adopts a structure (exchange type) that the plurality of protective covers 5 having different vibration direction lengths can be mounted on the main body housing 33, the present disclosure is not limited to such a structure and can also adopt a structure that the changing portions capable of changing the length of the protective cover protruding from the front end portion of the main body housing within the range of the operating stroke of the solenoid actuator 41 are formed on the main body housing and the protective cover.

(61) As a specific structure that the changing portions are formed, a mounting direction-specified protective cover 5y shown in FIG. 8 is described. FIG. 8 (a) is a stereogram illustrating a main body housing 33 and the protective cover 5y in a decomposed state. FIGS. 8 (b) and (c) are a front view and a longitudinal section view illustrating a state that the protective cover 5y is mounted on the main body housing 33.

(62) As shown in FIG. 8 (a), a part of the protective cover 5y passing through the basal end portion 5a is cut into a substantially rectangular shape, so as to form a plurality of concave portions 5a1 and 5a2 having different depths at four equidistant positions in a circumferential direction of the basal end portion 5a. The concave portions 5a1 and 5a2 are formed in such a manner that relatively deep first concave portions 5a1 are formed at two positions corresponding to each other, and relatively shallow second concave portions 5a2 are formed at two positions opposite to each other. In addition, an inner circumferential surface 5a is recessed to form the buckling portion 5c buckled by a claw portion 33c2 described later at a position of the basal end portion 5a at a specified distance deviating from the first concave portion 5a1 and the second concave portion 5a2 to a protruding end 5b side.

(63) A convex portion 33c1 corresponding to the first concave portion 5a1 in shape is formed in the front end portion 33c of the main body housing 33. In addition, an elastically deformable claw portion 33c2 is formed on a side closer to an opening end 33a than the convex portion 33c1 on an outer circumferential surface 33c of the front end portion 33c.

(64) The first concave portion 5a1, the second concave portion 5a2 and the claw portion 33c2 constitute a changing portion A capable of changing the length of the protective cover 5y protruding from the front end portion 33c of the main body housing 33. As shown in FIG. 8(b), when the protective cover 5y is embedded in the main body housing 33 in such a manner that the first concave portion 5a1 is clamped with the convex portion 33c1, the claw portion 33c2 is clamped with the buckling portion 5c. At this time, the first concave portion 5a1 and the convex portion 33c1 are clamped with each other without gap; and the main body housing 33 is closely adhered to the protective cover 5y in the vibration direction.

(65) On the other hand, when the protective cover 5y is temporarily pulled to the protruding direction Z1 to release the clamping of the first concave portion 5a1 and the convex portion 33c1, the protective cover 5y is brought close to the main body housing 33 again by rotating the protective cover 5y to the circumferential direction by 90 relative to the main body housing 33; and the second concave portion 5a2 can be embedded with the convex portion 33c1. In this case, as shown in Fig. (c), since only a part (front end portion) of the convex portion 33c1 is clamped with the second concave portion 5a2, the protective cover 5y is not inserted into the main body housing 33 deeply, the protruding length of the protective cover 5y is increased to the corresponding length. In this case, the claw portion 33c2 is clamped with the buckling portion 5c, so the protective cover 5y and the main body housing 33 are fixed to each other.

(66) In this way, the convex portion 33c1, as the changing portion A, extending to the axis direction of the head portion 11 is formed at the front end portion 33c of the main body housing 33. The first concave portion 5a1 having the depth for substantially clamping the entire convex portion 33c1 and the second concave portion 5a2 shallower than the first concave portion 5a1 are formed as the changing portions at the basal end portion 5a of the protective cover 5y as the cover portion. When the convex portion 33c1 is clamped with the first concave portion 5a1 and the second concave portion 5a2, the protruding length of the protective cover 5y can be changed.

(67) Thus, when the protective cover 5y is mounted on the main body housing 33, the length of the protective cover 5y protruding from the front end portion 33c of the main body housing 33 can be changed by clamping the relatively deeper first concave portion 5a1 with the convex portion 33c1 or clamping the relatively shallow second concave portion 5a2 with the convex portion 33c1; the operating stroke (attraction stroke) of the solenoid actuator 41 can be changed mechanically; and the strength of the beating force can be easily adjusted by one protective cover 5y.

(68) In addition, an elastically deformable claw portion 33c2 is formed at the front end portion 33c of the main body housing 33. The buckling portion 5c buckled with the claw portion 33c2 is formed at a position, at which the convex portion 33c1 is clamped with the first concave portion 5a1 or the second concave portion 5a2, of the basal end portion 5a of the protective 5y.

(69) Thus, the claw portion 33c2 can be clamped with the clamping portion 5c, and the protective cover 5y is fixedly mounted on the main body housing 33, so as to prevent the protective cover 5y from being separated from the main body housing 33 during the stain removing operation.

(70) It should be noted that a structure that the first concave portion 5a1, the second concave portion 5a2 and the buckling portion 5c are formed at the front end portion 33c of the main body housing 33, and the convex portion 33c1 and the claw portion 33c2 are formed at the basal end portion 5a of the protective cover 5y can also be adopted.

(71) Further, a structure that a screw portion is formed on the outer circumferential surface of any of the main body housing and the protective cover portion as the changing portion, a nut portion corresponding to the screw portion is formed on an inner circumferential surface of any of the main body housing and the protective cover as the changing portion, and the protruding length of the protective cover can be changed by increasing or decreasing a screw-in quantity of the screw portion screwed into the nut portion can also be adopted.

(72) With adoption of such a structure, since the main body housing and the protective cover can be mounted by screwing one into the other, the length of the protective cover protruding from the front end portion of the main body housing can be changed continuously, and the strength of the beating force can be easily adjusted by one protective cover.

(73) Further, a structure that other cover portions can also be complementally mounted at the front end portion of the protective cover to adjust the protruding length of the protective cover can also be adopted.

(74) In addition, although the stain removal device 100 of the above embodiment is a device which uses the beating surface 21a of the head portion 11 downward, the stain removal device 100 can also be configured to use the beating force 21a toward a transverse direction. In this case, the movable iron core 41a can also be stably pushed out to the protruding direction Z1 by the coil spring 46.

(75) Further, in the above-described embodiment, the operating stroke of the solenoid actuator 41 is adjusted by the protective covers 5, 5x, 5y and the like, but not limited to such a mechanical structure; and the operating stroke of the solenoid actuator 41 can also be adjusted by electrical control. In addition, the link mechanism 40 may not be provided, and the head portion 11 is protruded when the movable iron core 41a is attracted.

(76) In addition, in the above-described embodiment, the detergent mixture may be used as the liquid. In this case, since the detergent is continuously supplied to the stain portion sp of the clothes C during the stain removing operation, the detergent does not disappear from the stain portion sp due to gasification, scattering and the like, thereby maintaining the high stain removing effect.

(77) In addition, materials of the members of the stain removal device 100 are not limited to the materials shown by dash lines in each drawing.

(78) Other structures can also be subjected to various variations without departing from a scope of technical spirits of the present disclosure.