Abstract
Provided is an airbrush in which a needle cap separated from a nozzle is not easily lost. The airbrush includes: an airbrush body; a nozzle that is provided at a tip of the airbrush body so as to spray paint and air; a needle cap that is separably attached to the nozzle; and a needle cap attachment portion that is provided at a rear end of the airbrush body so as to temporarily attach the needle cap separated from the nozzle thereto.
Claims
1. An airbrush comprising: an airbrush body; a nozzle that is provided at a tip of the airbrush body so as to spray paint and air; a needle cap that is separably attached to the nozzle; and a needle cap attachment portion that is provided at a rear end of the airbrush body so as to temporarily attach the needle cap separated from the nozzle thereto, wherein the needle cap attachment portion includes a protrusion with means for temporarily attaching the needle cap to the outer periphery thereof, wherein the inner periphery of the needle cap is provided with a female screw threaded into a male screw formed in the outer periphery of the nozzle, wherein the outer periphery of the protrusion is provided with a male screw threaded into the female screw of the needle cap, wherein the needle cap attachment portion further includes an outer cylindrical body that surrounds the protrusion, an inner cylindrical body that is disposed between the outer cylindrical body and the protrusion, and a coil spring that is disposed between the airbrush body and the inner cylindrical body, and wherein when the inner cylindrical body is pushed toward the airbrush body against a biasing force of the coil spring, the male screw of the protrusion is exposed.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) FIG. 1 is a cross-sectional view illustrating a schematic entire configuration of an airbrush according to some embodiments of the present invention;
(2) FIGS. 2A and 2B are perspective views illustrating a needle cap that is separably attached to a nozzle of an airbrush;
(3) FIG. 3A is a cross-sectional view taken along the line IIIa-IIIa of FIG. 2A, and FIG. 3B is a cross-sectional view taken along the line IIIb-IIIb of FIG. 2B;
(4) FIGS. 4A, 4B, and 4C are views illustrating a procedure in which a needle cap is temporarily attached to a needle cap attachment portion formed in the airbrush;
(5) FIG. 5A is a cross-sectional view taken along the line Va-Va of FIG. 4A, and FIG. 5B is a cross-sectional view taken along the line Vb-Vb of FIG. 4B;
(6) FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 4C;
(7) FIGS. 7A, 7B, and 7C are views illustrating a configuration of a second embodiment of the airbrush of the present invention;
(8) FIGS. 8A and 8B are views illustrating a configuration of a third embodiment of the airbrush of the present invention; and
(9) FIGS. 9A and 9B are views illustrating a configuration of the third embodiment of the airbrush of the present invention.
DETAILED DESCRIPTION
(10) Hereinafter, a mode for carrying out the present invention (hereinafter, an embodiment) will be described in detail by referring to the accompanying drawings. Furthermore, the same reference numerals are given to the same components in the entire description of the embodiments.
(11) (First Embodiment)
(12) <Entire Configuration>
(13) FIG. 1 is a cross-sectional view illustrating a schematic entire configuration of an airbrush of the present invention. An airbrush 10 illustrated in FIG. 1 includes an airbrush body 20 that is substantially formed in a pencil shape. That is, the airbrush body 20 is formed in a rod shape that substantially extends in a straight line shape, and is handled such that the airbrush body is held like a pencil. A paint spray nozzle 30A is attached to the tapered tip of the airbrush body 20. A paint container 40 is provided in the upper portion of the rear portion of the paint spray nozzle 30A. Liquid paint (not illustrated) is accommodated in the paint container 40, and the paint is led into the paint spray nozzle 30A through a hole 40H formed in the bottom surface of the paint container 40. Furthermore, a paint spray hole 30H is formed in the tip of the paint spray nozzle 30A. The paint spray hole 30H is normally sealed by a tip of a needle 50 to be described later.
(14) Further, the lower portion of the intermediate portion of the airbrush body 20 is provided with an air supply hole 60 to which compressed air is supplied. The air supply hole 60 is formed as, for example, a connection tube 61 that is connected to a compressed air supply hose (not illustrated), and includes an air supply valve 62 formed therein. The air supply valve 62 may be opened by an operation in which an operation rod 70 provided at the upper portion opposite to the air supply hole 60 of the airbrush body 20 is pushed toward the airbrush body 20 (in a direction a of the drawing).
(15) A push rod 72 is connected to the tip of the operation rod 70 through a pivot shaft 71. When the push rod 72 is fitted to the axial portion of the connection tube 61, the operation rod 70 is supported in a pushable manner. The tip of the push rod 72 comes into contact with the air supply valve 62. The air supply valve 62 is opened by an operation in which the operation rod 70 is pushed. Then, the compressed air that flows from the air supply hole 60 by the operation of opening the air supply valve 62 passes through air passages 21, 21, and 21 formed inside the airbrush body 20, and is sprayed along the outer periphery of the paint spray nozzle 30A. An air spray nozzle 30B is provided so as to surround the paint spray nozzle 30A. The compressed air is sprayed through a gap between the paint spray nozzle 30A and the air spray nozzle 30B. In the present specification, both the paint spray nozzle 30A and the air spray nozzle 30B may be simply referred to as a nozzle 30.
(16) The needle 50 is disposed inside the airbrush body 20 so as to be slidable along the axial portion, and the needle 50 may be retracted by the operation of the operation rod 70. That is, the operation rod 70 may be tilted backward (in a direction of the drawing) around the pivot shaft 71. By the tilting movement of the operation rod 70, the needle 50 and a needle chuck 51 may be slid backward. The needle chuck 51 is fitted to the axial portion of the rear portion of the airbrush body 20. When the needle 50 is inserted through the needle chuck 51, the needle chuck 51 supports the needle 50. By the above-described operation of the operation rod 70, the sealing of the paint spray nozzle 30A using the needle 50 is released, so that the compressed air is sprayed from the air spray nozzle 30B and the paint from the paint container 40 is sprayed from the paint spray hole 30H of the paint spray nozzle 30A.
(17) Here, the sealing of the paint spray hole 30H of the paint spray nozzle 30A using the needle 50 is performed by, for example, a valve structure in which the tip of the needle 50 penetrates the paint spray hole 30H of the paint spray nozzle 30A so that the tip may be inserted thereinto and extracted therefrom. For this reason, the tip of the nozzle 30 through which the needle 50 protrudes from the paint spray hole 30H is provided with a needle cap 80 that protects the needle 50. The needle cap 80 is separably attached to the nozzle 30 (the air spray nozzle 30B) by, for example, threading. The needle cap 80 is normally attached to the nozzle 30. For example, when an extra fine line is depicted in painting or the like, there is a case in which the needle cap 80 is separated from the nozzle 30 and the tip of the nozzle 30 is made to approach a subject painting surface as close as possible.
(18) The needle chuck 51 includes a coil spring 52 therein, so that the needle chuck is constantly biased forward by the repelling force of the coil spring 52. An operation plate 53 substantially having an S-shape is interposed between the front end of the needle chuck 51 and the operation rod 70. When the operation rod 70 is tilted backward, the needle chuck 51 and the needle 50 may be slid backward through the operation plate 53. The rear end of the airbrush body 20 is provided with a needle cap attachment portion 90. here, the needle cap 80 will be described in detail prior to the description of the needle cap attachment portion 90.
(19) <Needle Cap 80>
(20) FIGS. 2A and 2B are perspective views illustrating the needle cap 80 that is separably attached to the nozzle 30 of the airbrush 10.
(21) FIG. 2A illustrates a case where the needle cap 80 is attached to the nozzle 30, and FIG. 2B illustrates a case where the needle cap 80 is separated from the nozzle 30.
(22) As obvious from FIGS. 2A and 2B, the needle cap 80 is substantially formed as a cylindrical member. As described above, the airbrush 10 is normally used while the needle cap 80 is attached to the nozzle 30 as illustrated in FIG. 2A. This is because the needle 50 of the tip of the nozzle 30 is protected by the needle cap 80. However, for example, when an extra fine line is depicted in painting or the like, there is a case in which the needle cap 80 is separated from the nozzle 30 and the tip of the nozzle 30 is made to approach the subject painting surface as close as possible as illustrated in FIG. 2B.
(23) FIG. 3A illustrates a cross-sectional view taken along the line IIIa-IIIa of FIG. 2A, and FIG. 3B illustrates a cross-sectional view taken along the line IIIb-IIIb of FIG. 2B. As illustrated in FIGS. 3A and 3B, the inner periphery of the needle cap 80 is provided with a female screw 80A. The outer periphery of the nozzle 30 is provided with a male screw 30C. When the female screw 80A is threaded into the male screw 30C of the nozzle 30, the needle cap 80 is attached to the nozzle 30 (see FIG. 3A). Then, when the threading of the female screw 80A with respect to the male screw 30C of the nozzle 30 is released, the needle cap 80 is separated from the nozzle 30 (see FIG. 3B). Furthermore, the needle cap 80 is famed of any one of metal and resin.
(24) <Needle Cap Attachment Portion 90>
(25) Returning to FIG. 1, the rear end of the airbrush body 20 is provided with the needle cap attachment portion 90. The needle cap attachment portion 90 includes a base 91 that is threaded into the axial portion of the airbrush body 20. A protrusion 92 is formed at the center axis of the base 91. The outer periphery of the protrusion 92 is provided with a male screw 92A (see FIG. 5). The female screw 80A of the needle cap 80 is threaded into the male screw 92A of the protrusion 92. A hole 91H is formed along the center axis of the base 91. The needle 50 is inserted into the hole 91H so as to be supported thereto. The base 91 is provided with an outer cylindrical body 93 which surrounds the protrusion 92 while having a gap with respect to the protrusion 92. An inner cylindrical body 94 is disposed between the protrusion 92 and the outer cylindrical body 93. A coil spring 95 is disposed between the inner cylindrical body 94 and the base 91.
(26) The inner cylindrical body 94 is formed in a shape in which a hole 94A is formed at the center of the bottom portion of the bottomed cylindrical body. The protrusion 92 is fixed while a bar portion 92P formed therein passes through the hole 94A of the bottomed cylindrical body and the coil spring 95 and is inserted into the hole 91H formed in the base 91. Accordingly, the inner cylindrical body 94 is disposed so as to cover the side surface provided with the male screw 92A of the protrusion 92 by the repelling force of the coil spring 95. Then, when the inner cylindrical body 94 is pushed toward the base 91 against the repelling force of the coil spring 95, the male screw 92A of the protrusion 92 may be exposed from the inner cylindrical body 94.
(27) FIGS. 4A, 4B, and 4C are views illustrating a procedure in which the needle cap 80 is temporarily attached to the needle cap attachment portion 90. FIG. 4A illustrates the needle cap attachment portion 90 to which the needle cap 80 is not attached thereto. The protrusion 92, the inner cylindrical body 94, and the outer cylindrical body 93 forming the needle cap attachment portion 90 are formed so that the rear end surfaces thereof are substantially and smoothly continuous to one another. These rear end surfaces are formed as curved surfaces in consideration of the good appearance thereof. FIG. 5A is a view illustrating a cross-section taken along the line Va-Va of FIG. 4A. The inner cylindrical body 94 is disposed so as to cover the side surface provided with the male screw 92A of the protrusion 92 by the coil spring 95.
(28) FIG. 4B illustrates the needle cap attachment portion 90 immediately before the needle cap 80 is threaded into the protrusion 92. One end of the needle cap 80 comes into contact with the inner cylindrical body 94 so as to cover the protrusion 92. FIG. 5B is a view illustrating a cross-section taken along the line Vb-Vb of FIG. 4B. The protrusion 92 and the needle cap 80 are coaxially disposed.
(29) FIG. 4C illustrates the needle cap attachment portion 90 in a state where the needle cap 80 is rotated about the axis thereof (in a direction of the drawing). Accordingly, when the threading of the male screw 92A of the protrusion 92 into the female screw 80A of the needle cap 80 starts, the needle cap 80 starts to push the inner cylindrical body 94 against the repelling force of the coil spring 95. Accordingly, the needle cap 80 is threaded into the protrusion 92, so that the needle cap 80 is temporarily attached to the needle cap attachment portion 90. FIG. 6 is a perspective view illustrating a cross-section taken along the line VI-VI of FIG. 4C. It is obvious that the female screw 80A of the needle cap 80 is threaded into the male screw 92A of the protrusion 92.
(30) As obvious from the description above, according to the airbrush 10 of the present invention, the needle cap 80 separated from the nozzle 30 may be simply and temporarily attached to the needle cap attachment portion 90 instantly. Accordingly, the needle cap 80 may not be easily lost.
(31) (Second Embodiment)
(32) In the first embodiment, the needle cap 80 is attached to the nozzle 30 by threading, and is temporarily attached to the needle cap attachment portion 90 by threading. However, the present invention is not limited to the dreading. The needle cap 80 may be attached or temporarily attached by fitting. FIGS. 7A, 7B, and 7C are views illustrating an airbrush of a second embodiment with such a configuration. FIG. 7A is a view corresponding to FIG. 3A. The rear end of the inner peripheral surface of the needle cap 80 separated from the nozzle 30 is provided with a convex portion 101 which is formed along the inner periphery thereof. Accordingly, the tip side of the inner peripheral surface of the needle cap 80 is provided with a concave portion 101A. Further, the outer peripheral surface of the nozzle 30 is provided with a concave portion 102 which is formed along the outer periphery thereof. Accordingly, a convex portion 102A is formed in the outer peripheral surface at the tip side of the nozzle 30 in relation to the concave portion 102 thereof. The needle cap 80 is attached to the nozzle 30 in a manner such that the convex portion 101 and the concave portion 101A of the needle cap 80 are respectively fitted to the concave portion 102 and the convex portion 102A of the nozzle 30. FIG. 7B is a view corresponding to FIG. 5A, and the tip side of the outer peripheral surface of the protrusion 92 of the needle cap attachment portion 90 is provided with a concave portion 103 which is formed along the outer periphery thereof. Accordingly, the rear end of the inner peripheral surface of the protrusion 92 is provided with a convex portion 103A. As in the case of FIG. 5B, the concave portion 103 and the convex portion 103A of the protrusion 92 are normally covered by the inner cylindrical body 94 that moves by the biasing force of the coil spring 95. FIG. 7C is a view corresponding to FIG. 5B, and is a view illustrating a case where the needle cap 80 separated from the nozzle 30 is temporarily attached to the needle cap attachment portion 90. As illustrated in FIG. 7C, the convex portion 103A and the concave portion 103 fanned in the outer peripheral surface of the protrusion 92 are exposed by the movement of the inner cylindrical body 94 against the coil spring 95, and the convex portion 101 and the concave portion 101A of the needle cap 80 are respectively fitted to the concave portion 103 and the convex portion 103A of the protrusion 92 of the needle cap attachment portion 90, so that the needle cap 80 is temporarily attached to the needle cap attachment portion 90.
(33) (Third Embodiment)
(34) In the second embodiment, the needle cap attachment portion 90 is provided with the coil spring 95 and the inner cylindrical body 94. However, the present invention is not limited thereto, and the coil spring 95 and the inner cylindrical body 94 may not be provided. FIG. 8A is a view corresponding to FIG. 7B, and FIG. 8B is a view corresponding to FIG. 7C. As illustrated in FIGS. 8A and 8B, the coil spring 95 and the inner cylindrical body 94 are riot provided compared to FIGS. 7B and 7C. Then, the other configurations are the same as those of FIGS. 7B and 7C.
(35) (Fourth Embodiment)
(36) In the first to third embodiments, the attachment and the temporary attachment of the needle cap 80 with respect to the nozzle 30 and the needle cap attachment portion 90 are performed by threading or fitting. However, the present invention is not limited thereto, and the attachment and the temporary attachment of the needle cap 80 with respect to the nozzle 30 and the needle cap attachment portion 90 may be performed by the adsorption of the magnet. FIGS. 9A and 9B are views respectively corresponding to FIGS. 8A and 8B. As illustrated in FIGS. 9A and 9B, the protrusion 92 of the needle cap attachment portion 90 is formed of a magnetic body (magnet) so that the surface thereof becomes, for example, an N (s) pole. Furthermore, although not illustrated in the drawings, the nozzle 30 (see FIG. 1) is also formed of a magnetic body (magnet) so that the surface thereof becomes an N (S) pole. Meanwhile, the needle cap 80 is formed of a magnetic body (magnet) so that the inner peripheral surface becomes, for example, an S (N) pole. In such a case, the attachment and the temporary attachment of the needle cap 80 with respect to the nozzle 30 and the needle cap attachment portion 90 may be performed with high reliability without preparing a particular design in the needle cap 80, the nozzle 30, and the needle cap attachment portion 90. In this case, the needle cap 80, the nozzle 30, and the needle cap attachment portion 90 do not need to be formed of a magnet, and a part thereof may be formed of a magnet. Then, the attachment and the temporary attachment of the needle cap 80 with respect to the nozzle 30 and the needle cap attachment portion 90 using the magnet may be applied to the configurations of the first embodiment and the second embodiment.
(37) (Fifth Embodiment)
(38) A so-called pencil type airbrush comprising an operation rod is described in the first to fourth embodiments. However, the present invention is not limited thereto, and may be also applied to a so-called gun type airbrush, for example, comprising a trigger instead of the operation rod.
(39) While the present invention has been described by using the embodiments, it is needless to mention that the technical scope of the present invention is not limited to the scope of the embodiments. It is obvious that various modifications or improvements may be made in the above-described embodiments by the person skilled in the art. Further, it is obvious that the modifications or the improvements are also included in the technical scope of the present invention from claims.
