Handle of a hand tool

Abstract

The handle of the handheld tool is provided to prevent the tool body from being mounted at an angle. [Solution] The handle of the handheld tool is a long resin handle comprising a rod-shaped central shaft portion 1 and a frame-shaped portion 3 surrounding the outer circumference of the central shaft portion 1 via an opening groove 2 formed in the front-back direction. The central shaft portion 1 and the frame-shaped portion 3 are integrated at the tail end, and the tips of the central shaft portion 1 and the frame-shaped portion 3 are formed to be relatively movable in the front-back direction. An insertion opening 31 is provided on the end face of the frame-shaped portion, and an axial hole 12 with an opening 11 is formed on the surface side of the end face of the central shaft portion that is separated from the end face of the frame-shaped portion. The base of the tool body A is inserted into the axial hole by aligning the insertion opening 31 and the opening 11. The axial hole 12 is formed at an angle from the opening 11 toward the back side.

Description

Technical Field

[0001] This invention mainly relates to a handle for attaching an appropriate tool body such as a rod-shaped file.

Background Art

[0002] In the handle of a hand-held tool for detachably attaching a rod-shaped file (tool body) or the like, a structure is known in which the base of the file is inserted into a mounting hole provided in the handle and the base is prevented from coming off by the elastic repulsive force of the resin handle. For example, in Patent Document 1, side surfaces of an intermediate portion of a mounting hole formed in the center of the handle are alternately opened, a large number of small protrusions are formed on the inner wall of the mounting hole, and the base of the tool is press-fitted into the mounting hole to hold the base.

[0003] Also, as the handle of a tool having a well-known structure shown in Non-Patent Document 1, a hand-held long handle is composed of a longitudinal central axis portion and a frame-shaped portion surrounding the central axis portion, the central axis portion and the frame-shaped portion are integrated at the tail end, the central axis portion is formed to be movable (by resin elasticity) in the groove direction (front and back direction) of a surrounding groove, and a shaft hole provided in the central axis portion and an insertion port provided at the front end of the frame-shaped portion are aligned by relative movement on the front end side of the central axis portion and the frame-shaped portion to insert the tool base.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Non-Patent Documents

[0005]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention relates to the "file handle" (hereinafter referred to as the "preceding handle") disclosed in Non-Patent Document 1, in which the shaft hole of the central shaft portion is formed in an axial direction that penetrates the center of the central shaft portion from the end face of the central shaft portion which is offset from the end face of the frame-shaped portion. Furthermore, in order to accommodate the bases of multiple sizes of files and other tools, the insertion opening diameter and shaft hole diameter are formed with some leeway (slightly larger in diameter). As a result, for most tool bases other than those that are tightly inserted into the shaft hole, there is play within the shaft hole. Consequently, when the tool body is attached, the tool body is held to protrude in a direction off-center from the central axis of the entire handle, within the range of play in the insertion opening and the play in the shaft hole, due to the elastic holding force in the front and back directions.

[0007] Since it is difficult to use a tool if the tool body (such as a file) protrudes in a direction offset from the center line of the handle, this invention proposes an improvement that provides a tool body mounting mechanism similar to that of the previous handle, but with the mounting direction of the tool body aligned with the center line of the handle. [Means for solving the problem]

[0008] The handle of the handheld tool according to the present invention is a long resin handle comprising a rod-shaped central shaft portion and a frame-shaped portion surrounding the outer circumference of the central shaft portion via an opening groove formed in the front-back direction, wherein the central shaft portion and the frame-shaped portion are integrally formed at the tail end, and the tips of the central shaft portion and the frame-shaped portion are formed to be relatively movable in the front-back direction at the front end, an insertion opening is provided on the end face of the frame-shaped portion, and an axial hole is formed with an opening on the surface side of the end face of the central shaft portion that is separated from the end face of the frame-shaped portion, and the base of the tool body to be mounted is inserted into the axial hole by aligning the insertion opening and the opening, wherein the axial hole is formed to be inclined from the opening toward the back side.

[0009] However, similar to the preceding handle, the tip of the central shaft is pressed toward the back, and at the same time, the tip of the frame-shaped part is pressed toward the front, aligning the insertion opening with the shaft hole opening, and the base of the tool body to be mounted is inserted from the insertion opening into the shaft hole. In particular, because the shaft hole is formed with an inclination toward the back side, even if there is play in the insertion opening and shaft hole when the base is inserted, the base will be held in place by the front inner surface of the insertion opening and the back inner surface of the shaft hole opening or the base contact point inside the shaft hole, and the deviation in the direction of tool mounting due to the play will be corrected by the inclination of the shaft hole, and as a result the mounted tool body will be mounted approximately on the extension of the center line of the long handle. [Effects of the Invention]

[0010] As described above, the structure of this invention solves the inconvenience of the mounting tool being mounted significantly off-center from the center line relative to the handle (long handle) caused by the insertion opening and shaft hole, which were made slightly larger in diameter in the previous handle to accommodate differences in the specifications of the base of the tool body, by providing the shaft hole at an angle. [Brief explanation of the drawing]

[0011] [Figure 1] An overall perspective view of an embodiment of the present invention. [Figure 2] In the same cross-sectional view, (a) shows the state before tool installation, and (b) shows the state after tool installation. [Figure 3] Side view of the tool in its installed state. [Modes for carrying out the invention]

[0012] Next, an embodiment of the present invention will be described. The embodiment shows an example in which a rod-shaped file is used as the tool body A.

[0013] This handle (handle of a hand tool) is a resin handle of an appropriate length for use as a handle for a hand tool, and comprises a rod-shaped central shaft portion 1 and a frame-shaped portion 3 that surrounds the outer circumference of the central shaft portion 1 via an opening groove 2 formed in the front-back direction, with the central shaft portion 1 and the frame-shaped portion 3 being integrally formed at the tail end, and the tips of the central shaft portion 1 and the frame-shaped portion 3 being formed to be relatively movable in the front-back direction at the front end.

[0014] In particular, the end face of the frame-shaped portion 3 is provided so that it does not cover the entire tip surface of the central shaft portion 1, but rather a part of the front side is exposed. An insertion opening 31 is drilled into the end face, and the outer surface is formed into a gripping surface 32.

[0015] The central shaft portion 1 has an opening 11 on its end face, which is exposed away from the end face of the frame-shaped portion 3, and a shaft hole 12 is formed therein. In particular, the shaft hole 12 is formed with a moderate inclination from the opening 11 toward the back side. Furthermore, the front surface is made to protrude in an overhang shape to form a pressing portion 13, and the surface of the pressing portion 13 is formed to be an anti-slip uneven surface.

[0016] However, to attach this handle, from the state shown in Figure 2(a), the pressing portion 13 of the central shaft portion 1 is pressed toward the back side, and at the same time the tip portion of the frame-shaped portion 3 is pressed toward the front side, and as shown in Figure 2(b), the base of the tool body A to be attached is inserted into the shaft hole 12 from the insertion port 31.

[0017] The base of the tool body A is held in place by the front inner surface of the insertion opening 31 and the back inner surface of the opening 11 or at the base contact point within the shaft hole 12. In particular, the diameters of the insertion opening 31, the shaft hole 12, and the base of the tool body A are not formed to allow for tight insertion, resulting in some play. Therefore, in the conventional case, the shaft hole formed on the centerline of the central shaft 1 was mounted in a direction offset from the centerline of the handle, as shown by the dashed line in Figure 3. However, in this invention, the shaft hole 12 is formed at an angle toward the back side, so the tool body A is mounted in a direction that is approximately in line with the centerline of the handle.

[0018] Therefore, it becomes possible to provide a tool in which the handle and the tool body A are almost in a straight line. [Explanation of Symbols]

[0019] 1 Central axis part 11 Opening 12 Shaft hole 13 Pressing part 2 Opening groove 3 Frame-shaped part 31 Insertion port 32 Concavo-convex surface for gripping

Claims

1. A long handle made of resin, comprising a rod-shaped central shaft and a frame-shaped portion surrounding the outer circumference of the central shaft via an opening groove formed in the front-back direction, wherein the central shaft and the frame-shaped portion are integrally formed at the tail end, and the tips of the central shaft and the frame-shaped portion are formed to be relatively movable in the front-back direction at the front end, an insertion opening is provided on the end face of the frame-shaped portion, and an axial hole is formed with an opening on the surface side of the end face of the central shaft portion that is separated from the end face of the frame-shaped portion, and the base of the tool body to be mounted is inserted into the axial hole by aligning the insertion opening and the opening, wherein the axial hole is formed to be inclined from the opening toward the back side.

2. The handle of a handheld tool according to claim 1, wherein the outer surface of the frame-shaped part is formed as a gripping surface with ridges and grooves, the tip surface of the central shaft part is made to protrude in an overhang shape, and the tip surface of the central shaft part is formed as a non-slip surface with ridges and grooves.

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