Auxiliary device of screwdriver

Abstract

An auxiliary device of screwdriver refers to an auxiliary device attached on a screwdriver, which is adapted for keeping coupled on a recess close to an end of the screwdriver. The auxiliary device has an expanding portion and a hollow column formed by the extension of the expanding portion. An end of the expanding portion has a magnetic element arranged thereon. The hollow column is formed by connecting a plurality of ribs and walls. The inner margin of the hollow column extends to form a plurality of locking portions that allow the housing to couple with the screwdriver, wherein the auxiliary device is able to pivot on the screwdriver.

Claims

1. An auxiliary device of screwdriver, which is an auxiliary device added on a screwdriver, wherein said screwdriver is a rod extending an end thereof to form a driving portion, wherein said screwdriver has a recess arranged around on said rod close to said driving portion, wherein said auxiliary device is arranged on an end of said screwdriver and kept sleeving on said recess, wherein said auxiliary device comprises an expanding portion, having a hollow accommodating space that has a catching groove therein that has a magnetic element put and tight secured in said expanding portion, and a retaining portion formed by extending said expanding portion, having a hollow accommodating space which outer margin has a plurality of spacedly arranged and axially extending ribs, a plurality of walls axially extending and connecting between said ribs, and a plurality of axially extending valleys between said walls and said ribs, wherein the transverse thickness of said rib is greater than the transverse thickness of said wall, while the transverse thickness of said valley is smaller than the transverse thickness of said wall, wherein said retaining portion has an inner margin, wherein the inner margin of said retaining portion extends to form a plurality of opposite locking portions, wherein said locking portions are arranged at the opposite positions to the walls, wherein each said locking portion has end faces that are arc faces.

2. The auxiliary device of screwdriver, as recited in claim 1, made with slightly flexible material(s), comprising rubber and plastics.

3. An auxiliary device of screwdriver, referring to a device to be assembled on a screwdriver to assist for screw driving and alignment, wherein said screwdriver has a driving portion arranged thereon and a recess arranged around on said screwdriver and close to said driving portion, wherein said auxiliary device is arranged on an end of said screwdriver and kept sleeving on said recess, wherein said auxiliary device comprises: an expanding portion, which is a hollow annular structure having an inner margin and a catching groove on the inner margin thereof, wherein said catching groove has a magnetic element put and tight secured in said expanding portion; and a retaining portion, which is a hollow column formed by extending said expanding portion and has a plurality of axially extending ribs spacedly arranged on an exterior surface thereof, an axially extending wall extended and connected between said ribs, and an axially extending valley extended and formed between said walls and said ribs, wherein said hollow column shaped retaining portion is defined and formed by a plurality of said ribs, said valley, and said wall orderly aligning, extending, and connecting with one another, wherein the transverse thickness of said rib is greater than the transverse thickness of said wall, while the transverse thickness of said valley is smaller than the transverse thickness of said wall, wherein said retaining portion has an inner margin, wherein the inner margin of said retaining portion extends to form a plurality of locking portions, wherein said locking portions are arranged at the opposite positions to the walls, wherein each said locking portion has four end faces that are all round.

4. The auxiliary device of screwdriver, as recited in claim 3, made with flexible material(s), comprising rubber and plastics.

5. An auxiliary device of screwdriver, referring to a device to be assembled on a screwdriver to assist for screw driving and alignment, wherein said screwdriver has a driving portion and has a recess arranged around on said screwdriver and close to said driving portion, wherein said auxiliary device is arranged on an end of said screwdriver and kept sleeving on said recess, wherein said auxiliary device has a hollow expanding portion and a hollow retaining portion formed by extending said expanding portion, wherein said expanding portion has an inner margin and a catching groove arranged on the inner margin thereof, wherein said catching groove has a magnetic element put and tight secured on said expanding portion, wherein an exterior surface of said retaining portion has a plurality of axially extending ribs spacedly arranged thereon, wherein said ribs extend and connect to form an axially extending wall and said ribs and said wall connect and form an axially extending valley therebetween, wherein said plurality of ribs, said valley, and said wall orderly aligning with one another to form said hollow retaining portion, wherein the transverse thickness of said rib is greater than the transverse thickness of said wall, while the transverse thickness of said valley is smaller than the transverse thickness of said wall, wherein said retaining portion has an inner margin, wherein the inner margin of said retaining portion extends to form a plurality of locking portions, wherein said locking portions are arranged at the opposite internal side of the walls.

6. The auxiliary device of screwdriver, as recited in claim 5, wherein each said locking portion has end faces that are arc faced, which means that every said end face is fillet.

7. The auxiliary device of screwdriver, as recited in claim 5, made with flexible material(s), comprising rubber and plastics.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a 3D view of an auxiliary device according to the present invention.

(2) FIG. 2 is a side view of the above auxiliary device according to the present invention.

(3) FIG. 3 is a side sectional view of the above auxiliary device according to the present invention.

(4) FIG. 4 is a top sectional view of the above auxiliary device according to the present invention.

(5) FIG. 5 is a side sectional view of the above auxiliary device according to the present invention illustrating an implementation.

(6) FIG. 6 is a side sectional view of the above auxiliary device according to the present invention illustrating the auxiliary device assembled on a screwdriver.

(7) FIG. 7 is a perspective view of a screwdriver according to the present invention driving a nut bolt.

(8) FIG. 8 is a prior art about an exploded view of a conventional screwdriver and a conventional auxiliary device.

(9) FIG. 9 is a prior art about a 3D view of a conventional auxiliary device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(10) The following description is disclosed to enable any person skilled in the art to make and use the present invention. Preferred embodiments are provided in the following description only as examples and modifications will be apparent to those skilled in the art. The general principles defined in the following description would be applied to other embodiments, alternatives, modifications, equivalents, and applications without departing from the spirit and scope of the present invention.

(11) FIGS. 1-7 refers to the auxiliary device of screwdriver, wherein the screwdriver 6 is a rod 61 that extends an end thereof to form a driving portion 62 and has a recess 63 arranged around on the rod 61 close to said driving portion 62. The auxiliary device 1 is made of slightly flexible material(s), such as rubber or plastics. The auxiliary device 1 is arranged on an end of the screwdriver 6 and kept sleeving on the recess 63. The auxiliary device 1 has a hollow expanding portion 11 that extends to form a hollow retaining portion 2. The inner margin of the expanding portion has a catching groove 12. The catching groove 12 has a magnetic element 4, as shown in FIG. 5. The magnetic element 4 is externally put and tight secured on the expanding portion 11, wherein the way that the magnetic element 4 tight secured on the catching groove 12 can be with adhesives or other ways of locking. The outer margin of the retaining portion 2 has a plurality of ribs 21 axially spacedly arranged thereon. There are walls 22 axially arranged between the ribs 21. There are valleys 23 axially arranged between the walls 22 and the ribs 21. To define from another perspective, the ribs 21 extend and connect to form a wall 22 and the ribs 21 and the wall 22 form and connect a valley 23 therebetween, wherein a plurality of the ribs 21, the valley 23, and the wall 22 orderly aligning with one another to form the hollow retaining portion 2. The transverse thickness of the rib 21 is greater than the transverse thickness of the wall 22, while the transverse thickness of the valley 23 is smaller than the transverse thickness of the wall 22, as FIGS. 3 and 4 illustrated. The inner margin of the retaining portion 2 extends to form a plurality of locking portions 31, wherein the locking portions 31 are arranged at the opposite internal side. Besides, the end faces 31a of the locking portion 31 are arc faces, which means that every end face 31a is fillet, as FIGS. 3-5 illustrated. Such special design of the round end faces provides slippery function when the locking portions 31 are pushed on the rod 61 of the screwdriver 6 and helps the auxiliary device 1 to pivot on the recess 63 smoothly. On the other hand, such design on the auxiliary device 1 will not hinder the screwdriver 6 from driving the nut bolt 5 smoothly, as FIG. 7 illustrated.

(12) FIG. 6 illustrates the way how the auxiliary device is assembled onto the screwdriver 6, wherein the auxiliary device 1 is sleeved onto the screwdriver 6 from the driving portion 62 thereof and axially pushed with external force to have the auxiliary device 1 keep sleeving forward on the driving portion 62. The locking portion 31 has slight expanding and restoring flexibility as the valley 23 provides the walls 22, so as to relatively support the locking portion 31 to have a push-to-hold function and slightly expand. As a result, the locking portion 31 slightly expands when it is on the outer margin side of the rod 61, which allows the auxiliary device 1 to be pushed to sleeve onto the rod 61 of the screwdriver 6 smoothly and moved all the way toward the recess 63. When the retaining portion 2 arrive the position of the recess 63, the walls 22 will draw back to the original state thereof, such that the locking portion 31 can lock or embed on the screwdriver 6 and allow the auxiliary device 1 to be pivotably retained on the screwdriver 6. Besides, the axial extent 63a of the recess 63 is slightly greater than the axial extent 31 of the locking portion 31. Therefore, the auxiliary device 1 can be axially slid in a limited distance on the recess 63 so as to be suitable for various sizes of nut bolts and ensure that the auxiliary device 1 can magnetically attractingly couple with the head 51 of the nut bolt and prevent it from dropping. Besides, it also mildly limits the depth of the head of the nut bolt 51 in reaching into the workpiece.

(13) the present invention The shape of the screwdriver 6 of the present invention is only an example to provide a description and embodiment and shall not be a limit of the present invention. The auxiliary device 1 of the present invention may also be suitable for other driving tools.

(14) All in all, the auxiliary device 1 has a function of catching the head 51 of the nut bolt 5 because of the magnetic element 4. The magnetic element 4 also allow the head 51 of the nut bolt 5 to separate from the auxiliary device 1 easily.

(15) Especially, when the head 51 of the nut bolt 5 is locked into a workpiece, the screwdriver 6 will be limited and stopped from continuing drilling or reaching in when the bottom surface of the expanding portion 11 of the auxiliary device 1 attains the workpiece, such that the auxiliary device is able to prevent the surface of the workpiece from being damaged.

(16) Features of the present invention include that the auxiliary device 1 is an integrally formed plastic structure, wherein the retaining portion 2 thereof has a plurality of ribs 21 extend and connect to form a wall 22, wherein the ribs 21 and the wall 22 form and connect a valley 23 therebetween, wherein a plurality of the ribs 21, the valley 23, and the wall 22 orderly aligning with one another to form the hollow retaining portion 2, which allows the wall 22 to have slight expanding flexibility. Such function of expansion makes the auxiliary device 1 be assembled on to the screwdriver 6 easily and relatively provides it a function of being taken away from the screwdriver with external force.

(17) The above relates to specific embodiments of the present invention, which are for description purposes. Several extensions and modifications can also be made without being apart from the spirit of the present invention.

(18) The public embodiments are to describe in all approaches, rather than to limit the present invention. The scope of the present invention is pointed out in the appended claims instead of the above descriptions. Besides, all changes within the equivalent framework and scope of the present invention are all included based on the appended claim.

(19) One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.

(20) It will thus be seen that the objects of the present invention have been fully and effectively accomplished. The embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.