JP2019198910A - Screwdriver - Google Patents

Abstract

To provide a screwdriver enabling using two kinds of cutting edges by one screwdriver, and arbitrarily changing a length of a shaft.SOLUTION: A screwdriver 1A includes a shaft 2 having different cutting edges 3a,3b on both ends, and a handle 10 having a shaft fit-in through hole 12 in which the shaft 2 is fitted, and slidable to an arbitrary position on the shaft 2. The cross sections of the shaft 2 and the shaft fit-in through hole 12 are polygons, and the handle 10 has a shaft fixing through hole 11 enabling inserting a member for fixing the handle 10 to the shaft 2. The handle 10 may be provided with a shaft fixing part for fixing the handle 10 to the shaft 2. It is preferable to provide a toothed part 4 in which projections/recessions are repeated in the longitudinal direction of the shaft, on the surface of the shaft 2.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to a driver having different cutting edges at both ends of a shaft and capable of changing the shaft length to an arbitrary length.

  Conventionally, as a plus / minus screwdriver that can be used as both a plus screwdriver and a minus screwdriver, a plus type blade edge is provided at one end of the shaft and a minus type blade edge is provided at the other end so that the shaft can be reversed and attached to the handle. The blade edge is formed from a negative blade edge and a slidable blade edge that is combined with the negative blade edge to form a plus blade edge, and the slidable blade edge is pushed out and retracted. There is what is made possible (Patent Document 3).

Utility Model Registration No. 3027873 Japanese Utility Model Publication No. 57-28877 JP 2001-225277 A

  The conventional plus / minus screwdriver can change the blade edge to be used to the plus or minus type, but cannot change the axial length between the blade edge and the handle. However, when using the driver, the blade tip may not reach the target screw unless the shaft is long, or it may be difficult to screw in unless the shaft is shortened. .

  On the other hand, an object of the present invention is to provide a driver that can use two types of cutting edges with one screwdriver and can change the axial length to an arbitrary length.

  The inventor provides different blade tips on both ends of the shaft of the driver, forms a shaft insertion through hole into which the shaft is inserted into the handle, and makes both the shaft and the shaft insertion through hole have a polygonal cross section. The present invention has been conceived that the handle can be slid to an arbitrary position on the shaft and rotation around the shaft of the handle can be easily transmitted to the shaft, and in this case, it is preferable that the handle and the shaft can be fixed. Was completed.

That is, as a first aspect of the present invention, there is provided a screwdriver having a shaft having different cutting edges at both ends, a shaft insertion through hole into which the shaft is inserted, and a handle slidable at an arbitrary position on the shaft. There,
The cross section of the shaft and the shaft insertion through hole is polygonal,
A handle is provided with a shaft having a shaft fixing through-hole that allows insertion of a rod-like member for fixing the handle to the shaft.

In addition, as a second aspect of the present invention, there is provided a screwdriver having a shaft having different cutting edges at both ends, a shaft insertion through hole into which the shaft is inserted, and a handle slidable at an arbitrary position on the shaft. There,
The cross section of the shaft and the shaft insertion through hole is polygonal,
The handle provides a driver having a shaft fixing portion for fixing the handle to the shaft.

  The driver of the present invention has different cutting edges at both ends of the shaft, and the handle can be slid to an arbitrary position on the shaft. Therefore, one driver can be used as a manual driver having two types of cutting edges. In addition, the axial length can be adjusted to a preferred length according to the usage scene. Further, by having different cutting edges at both ends of the shaft and sliding the handle to an arbitrary position on the shaft, the driver of the present invention can also be used as a bit for both blades of an electric driver.

  According to the driver of the present invention, the handle has a shaft insertion through hole into which the shaft is inserted, and the shaft and the shaft insertion through hole have a polygonal cross section. Is inserted and the handle is rotated around the shaft, the rotation is transmitted to the shaft, and the shaft can be prevented from idling.

  In particular, according to the first aspect of the present invention, the shaft-shaped through-hole for allowing the insertion of the rod-shaped member that fixes the handle to the shaft is provided. If the diameter of the shaft fixing through hole is matched with the shaft of the second driver, the shaft of the second driver is pushed into the shaft fixing through hole, thereby In addition to eliminating circumferential displacement, the handle and shaft can also be fixed in the longitudinal direction of the shaft. Therefore, it is possible to perform screwing well with the screwdriver of the present invention, and further, the second screwdriver in which the shaft is inserted into the shaft fixing through hole is used as a wrench when screwing with the screwdriver of the present invention. Is also possible.

  On the other hand, according to the second aspect of the present invention, since the handle has the shaft fixing portion for fixing the handle to the shaft, a member inserted into the shaft fixing through hole is not used as in the first mode. However, it is possible to prevent misalignment of the handle and the shaft around the shaft or the shaft in the longitudinal direction, and to perform screwing well.

FIG. 1A is a perspective view of a driver 1A of the embodiment and a partially enlarged sectional view thereof. FIG. 1B is a perspective view of the shaft of the driver 1A of the embodiment. FIG. 2 is a perspective view of a state in which the shaft of the second driver is inserted into the shaft fixing through hole of the driver 1A of the embodiment. FIG. 3A is an explanatory diagram of an engagement state between the tooth portion of the shaft of the driver 1A and the shaft of the second driver according to the embodiment. FIG. 3B is an explanatory diagram of an engaged state between the tooth portion of the shaft of the driver 1A and the shaft of the second driver according to the embodiment. FIG. 4 is a side view of an electric screwdriver in which the driver 1A of the embodiment is attached as a double-edged bit. FIG. 5 is a perspective view of the driver 1B of the embodiment. FIG. 6A is a cross-sectional view showing a state where the second driver is not inserted into the shaft fixing through hole in the driver 1B of the embodiment. FIG. 6B is a cross-sectional view illustrating a state in which the second driver is inserted into the shaft fixing through hole in the driver 1B of the embodiment. FIG. 7A is a perspective view of the driver 1C of the embodiment. FIG. 7B is a top view of the driver 1C according to the embodiment. FIG. 8A is a perspective view of the driver 1D of the embodiment in a state in which one blade edge protrudes from the handle. FIG. 8B is a perspective view of the driver 1D of the embodiment in a state where the screw provided as the shaft fixing portion is loosened. FIG. 8C is a perspective view of the driver 1D of the embodiment in a state where the other blade edge protrudes from the handle.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In each figure, the same numerals represent the same or equivalent components.

  FIG. 1A is a perspective view of a driver 1A according to an embodiment of the present invention, and a partially enlarged sectional view thereof. FIG. 1B is a perspective view of a shaft 2 used in the driver 1A.

  This driver 1 </ b> A has different cutting edges at both ends of the shaft 2. More specifically, one cutting edge 3a is a plus type and the other cutting edge 3b is a minus type. In the present invention, the cutting edges at both ends are not limited to the plus type and the minus type, and may be, for example, a minus type and a minus type having different tooth widths. However, it is preferable to make the diameter of the shaft 2 compliant with the JIS standard from the viewpoint that the driver 1A can be used as a double-edged bit of an existing electric screwdriver.

  The shape of the cross section of the shaft 2 (cross section perpendicular to the longitudinal direction of the shaft) is hexagonal, and the surface of the shaft 2 has rectangular irregularities in the longitudinal section (cross section parallel to the longitudinal direction of the shaft) of the shaft 2. The tooth part 4 repeated in the longitudinal direction is formed from the base part of one cutting edge of the shaft 2 to the base part of the other cutting edge.

  The repeated shape of the unevenness of the tooth portion 4 corresponds to the cross-sectional shape of the rod-shaped member inserted into the shaft fixing through hole 11 provided in the handle 10. The shaft fixing through-hole 11 is a hole for allowing the handle 10 to be fixed to the shaft 2 by inserting a rod-like member therein. For example, as shown in FIG. The cross-section of a typical second driver 20 allows a hexagonal shaft 22 to be inserted. In this case, the tooth part 4 can be formed by repeating rectangular irregularities.

  The repetition pitch of the unevenness in the tooth portion 4 also corresponds to the rod-like member inserted into the shaft fixing through hole 11. As described above, when the shaft 22 of the second driver 20 is used as the rod-like member, the repetition pitch of the unevenness in the tooth portion 4 is the axis of the driver 1A by the rotation around the shaft 22 of the second driver 20. What is necessary is just to make 2 send in the longitudinal direction. Therefore, the repetition pitch of the unevenness in the tooth portion 4 may be substantially equal to the length of one side of the hexagon of the cross section of the shaft 22 of the second driver 20 as shown in FIG. 3A. Or you may make the repetition pitch of the unevenness | corrugation in the tooth | gear part 4 1/2 of the pitch shown to FIG. 3A. Further, as shown in FIG. 3B, the tooth portion 4 may have a triangular wave shape in the longitudinal section of the shaft 2 of the driver 1A.

  On the other hand, the handle 10 of the driver 1 </ b> A has a shaft insertion through-hole 12, and the cross-sectional shape of the shaft insertion through-hole 12 is a hexagon corresponding to the cross-sectional shape of the shaft 2. Therefore, the handle 10 can be slid to an arbitrary position on the shaft in a state where the shaft 2 is fitted in the shaft fitting through hole 12. Since the shaft 2 and the handle 10 fitted in the shaft fitting through-hole 12 are fitted with a hexagonal cross-sectional shape, the shaft 2 and the handle 10 are not easily displaced in the circumferential direction of the shaft 2. . Therefore, when the handle 10 is turned at the time of screwing, the force is transmitted well to the blade edges 3a and 3b. Further, by making the fitting degree close, it is possible to prevent the shaft 2 from inadvertently falling out of the handle 10. In the present invention, the cross-sectional shape of the shaft 2 is not limited to a hexagon, and may be a polygon, for example, a tetragon.

  As described above, the handle 10 is also provided with the shaft fixing through hole 11. The shaft fixing through-hole 11 is formed at a position where a rod-like member inserted into the shaft-fixing through-hole 11 is engaged with the tooth portion 4, and the shaft 22 of the second driver 20 is used as this rod-like member. In this case, the shaft 22 inserted into the shaft fixing through hole 11 is in a position where the tooth portion 4 is engaged. In general, since the shaft diameter of the driver is formed to a predetermined diameter according to the standard, the hole diameter of the shaft fixing through hole 11 is preferably adapted to the standard. In that case, as a rod-like member inserted into the shaft fixing through hole 11, a shaft of a drill bit of an electric driver can be used in addition to a shaft of a manual driver. On the other hand, the rod-shaped member inserted into the shaft fixing through hole 11 is not limited to the shaft of the driver, and for example, a hexagonal wrench shaft may be used.

  The handle 10 of the driver 1 </ b> A according to the present embodiment may be provided with a shaft fixing portion that engages with the unevenness of the tooth portion 4 and fixes the handle 10 to the shaft 2. For example, as shown in FIG. 1A, a metal sphere 13 is provided as a shaft fixing portion in the handle 10, and the sphere 13 is held at a position where it abuts on the tooth portion 4. When the sphere 13 comes into contact with the convex portion of the tooth portion 4 when the handle 10 is slid in the longitudinal direction of the shaft 2 on the shaft 2, the sphere 13 is elastically deformed and presses the tooth portion 4, and the concave portion of the tooth portion 4 When the contact is made, the deformation of the sphere 13 returns, and the pressure on the tooth portion 4 is reduced or released. Thereby, the handle 10 can be easily slid on the shaft 2, and the handle 10 can be prevented from being accidentally detached from the shaft 2.

  As a method of using the driver 1A, the handle 10 is slid on the shaft 2 to project the blade edge (3a or 3b) to be used from the handle 10 and the shaft 2 between the blade edge and the handle 10 is moved. The length is adjusted according to the usage scene of the driver 1A.

  This sliding may be performed by directly moving the handle 10. However, when the shaft fixing through hole 11 corresponds to the shaft 22 of the second driver 20 as described above, the shaft fixing through hole is used. 11, the shaft 22 of the second driver 20 is inserted, the shaft 22 and the concave and convex portions of the tooth portion 4 are engaged, and the handle 21 of the second driver 20 is turned around the shaft 22, thereby driving the driver 1A of the embodiment. The shaft 2 may be sent out. In this embodiment, since the tooth portion 4 is formed from the base portion of one blade edge 3a to the base portion of the other blade edge 3b, the handle 10 is fed to an arbitrary position on the shaft 2 and protrudes from the handle 10 of the driver 1A. The length of the shaft 2 can be adjusted to a desired length. In this case, when an electric screwdriver is used as the second driver, the shaft 2 can be sent out from the handle 10 more easily.

  When the screw is screwed with the driver 1A of the embodiment, the shaft 22 of the second driver 20 may be inserted into the shaft fixing through hole 11. As a result, the handle 10 can be prevented from inadvertently shifting both in the longitudinal direction of the shaft 2 and in the direction around the shaft. Further, the second driver 20 can be used as a wrench, and a strong force can be applied to the screw during screwing.

  Alternatively, the driver 1A may be in a state in which both the cutting edges 3a and 3b protrude from the handle 10, and the driver 1A may be attached as a double-edged bit of the existing electric screwdriver 30, as shown in FIG. By setting the shaft diameter of the driver 1A to a general size according to the JIS standard, the driver 1A can be easily attached to the chuck 31 of the existing electric driver 30.

  The driver of the present invention can take various forms. For example, in the driver 1B shown in FIG. 5, in the driver 1A shown in FIG. 1A, instead of providing the spherical body 13 held in the handle 10 as the shaft fixing portion, the shaft 2 is pressed by the spring material. The pressing member 15 that is biased is attached to the handle 10. More specifically, as shown in FIG. 6A, the pressing member 15 has a shape in which the tip portion engages with the unevenness of the teeth 4 of the shaft 2, and presses the shaft 2 by the spring material 14. Therefore, the shaft 2 is fixed to the handle 10 in a state where no rod-like member is inserted into the shaft fixing through hole 11.

  Further, the surfaces 15 a and 15 b on the side of the openings 11 a and 11 b of the shaft fixing through hole 11 of the pressing member 15 are inclined with respect to the central axis A of the shaft fixing through hole 11. More specifically, the end portions on the shaft 2 side of the surfaces 15a and 15b are inclined with respect to the opposite end portions so as to be away from the openings 11a and 11b. Therefore, when the shaft 22 of the second driver 20 is inserted into the shaft fixing through-hole 11 and the pressing member 15 is pressed by the shaft 22, the pressing member 15 is easily moved away from the shaft 2 as shown in FIG. 6B. The shaft 22 is pressed against the tooth portion 4 and the engagement between the shaft 22 and the tooth portion 4 is strengthened. Therefore, the shaft 2 of the driver 1B can be easily fed out in the longitudinal direction by rotating the shaft 22 of the second driver around the shaft.

  In the driver 1C shown in FIG. 7A, the handle 10 is not provided with the shaft fixing through-hole 11, and the handle 10 is provided with a dial 16 having a gear engaging with the tooth portion 4 of the shaft 2 as the shaft fixing portion. It has been. According to this driver 1C, by turning the dial 16, the shaft 2 can be sent out from the handle 10 with an arbitrary shaft length, and the shaft 2 can be fixed to the handle 10 at that position.

  In the driver 1D shown in FIG. 8A, the tooth portion 4 is not provided on the shaft 2. Further, the handle 10 is not provided with the shaft fixing through hole 11, and a screw 17 for pressing the shaft 2 is provided as a shaft fixing portion for fixing the handle 10 to the shaft 2. When the screw 17 is screwed in as shown in the figure, the handle 10 is fixed to the shaft 2, but when the screw 17 is turned, the tip of the screw 17 is separated from the shaft 2 as shown in FIG. The handle 10 can be slid to any position on the shaft 2. Therefore, for example, the cutting edge 3b located in the handle 10 as shown in FIG. 8A protrudes from the handle 10 with an arbitrary axial length as shown in FIG. The position can be fixed.

  In the present invention, the shaft fixing through hole 11 and the shaft fixing portion described above can be provided in appropriate combination. Further, the configuration of the shaft fixing portion is not particularly limited. As a structure for fixing the shaft 2 to the handle 10 with a desired shaft length or a structure for feeding the shaft 2 out of the handle 10, for example, a ratchet mechanism using the tooth portion 4 of the shaft 2 may be provided in the handle 10. Good.

1A, 1B, 1C, 1D Driver 2 Shaft 3a, 3b Cutting edge 4 Tooth part 10 Handle 11 Shaft fixing through hole 12 Shaft fitting through hole 13 Sphere 14 Spring material 15 Press member 16 Dial 17 Screw 20 Second driver 21 Second 2 Driver handle 22 Second driver shaft 30 Electric driver 31 Chuck

Claims (7)

A screwdriver having a shaft having different cutting edges at both ends, a shaft insertion through hole into which the shaft is inserted, and a handle slidable at an arbitrary position on the shaft,
The cross section of the shaft and the shaft insertion through hole is polygonal,
A river having a shaft fixing through-hole that allows a handle to be inserted into a rod-like member that fixes the handle to the shaft. A screwdriver having a shaft having different cutting edges at both ends, a shaft insertion through hole into which the shaft is inserted, and a handle slidable at an arbitrary position on the shaft,
The cross section of the shaft and the shaft insertion through hole is polygonal,
The driver has a shaft fixing portion for fixing the handle to the shaft.   The screwdriver according to claim 1 or 2, wherein a cross section of the shaft and the shaft-inserting through hole is a hexagon.   The driver according to any one of claims 1 to 3, wherein a tooth portion in which irregularities are repeated in a longitudinal direction of the shaft is formed on a surface of the shaft.   The driver according to claim 4, wherein the tooth portion has a shape that engages with a bar-shaped member having a hexagonal cross section.   The driver according to claim 4 or 5, wherein the tooth portion is formed from a base portion of one blade edge to a base portion of the other blade edge.   The driver according to claim 1, wherein one blade edge is a plus type and the other blade edge is a minus type.

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