screwdriver

Abstract

A screwdriver comprises a first handle, a second handle and a cutter head, wherein the cutter head is connected to the first handle and the second handle, the axis of the second handle is perpendicular to the axis of the cutter head, and driven by the second handle, the cutter head rotates relative to the first handle around its own axis, and the first handle restricts the movement of the cutter head along its own axis. The screwdriver can ensure stable contact between the screwdriver head and the screw in a narrow space, so as to facilitate the screwing operation.

Description

Technical Field

[0001] The invention relates to the field of hardware tools, in particular to a screwdriver. Background Art

[0002] A screwdriver is a commonly used hardware tool that can turn a screw and force it into place by applying force to the screw. It includes a handle for turning and a screwdriver head. Generally speaking, the axes of the screwdriver head and the handle are on the same straight line. Such a setting requires a large space above the screw to facilitate the insertion of the screwdriver.

[0003] In order to adapt to a smaller space, in the prior art, the axis of the screwdriver head and the axis of the handle are generally set to be perpendicular to each other. When screwing a screw, the handle is swung in a horizontal plane with the axis of the screwdriver head as the center of the circle, taking the axis of the screwdriver head as the axis to apply a force to the screwdriver head. However, on the one hand, the handle needs to give the screwdriver head a rotational force to drive the screwdriver to rotate, and on the other hand, a downward force needs to be applied to the screw through the screwdriver head. After the combination of these two forces, the handle will be subjected to an oblique downward force, which will easily cause the screwdriver head to tilt during the screwing process, and the screwing operation of the screw cannot be completed smoothly. Summary of the invention

[0004] The object of the present invention is to provide a screwdriver which can ensure stable contact between the screwdriver head and the screw in a narrow space, thereby facilitating the screwing operation.

[0005] The present invention provides a screwdriver, comprising a first handle, a second handle and a cutter head, wherein the cutter head is connected to the first handle and the second handle, the axis of the second handle is perpendicular to the axis of the cutter head, and driven by the second handle, the cutter head rotates around its own axis relative to the first handle, and the first handle limits the movement of the cutter head along its own axis.

[0006] Furthermore, the cutter head portion includes a cutter head portion body, a cutter head and a rotating shaft, the cutter head and the rotating shaft are respectively arranged on two end surfaces of the cutter head portion body, the first connecting portion of the first handle and the second connecting portion of the second handle are both provided with through holes, the rotating shaft passes through the through holes of the first connecting portion and the second connecting portion, the rotating shaft fixing piece is combined with the rotating shaft, and the first handle is clamped between the rotating shaft fixing piece and the cutter head portion, so that the first handle limits the movement or movement trend of the cutter head portion along its own axial direction.

[0007] Furthermore, a first clamping portion is formed on the end surface of the second handle facing the blade head, and a second clamping portion is formed on the end surface of the blade head facing the second handle. The second handle can move relative to the blade head along the axial direction of the blade head. When the first clamping portion is combined with the second clamping portion, the second handle drives the blade head to rotate around the axis of the blade head.

[0008] Furthermore, the cutter head portion includes a rotating shaft, the second handle is arranged on the rotating shaft, the second handle forms a free travel section on the rotating shaft of the cutter head portion, the length of the free travel section at least ensures that the second handle can move along the axial direction of the cutter head portion and enable the first clamping portion to disengage from the second clamping portion; when the first clamping portion disengages from the second clamping portion, the second handle can rotate relative to the cutter head portion around the rotating shaft of the cutter head portion.

[0009] Further, the first engaging portion includes a plurality of first protruding teeth, which protrude from the end surface of the second connecting portion of the second handle toward the side where the blade head is located, and a first slot is formed between two adjacent first protruding teeth, and the second engaging portion includes a plurality of second protruding teeth, which protrude from the end surface of the blade head toward the side where the second connecting portion is located, and a second slot is formed between two adjacent second protruding teeth, and when the first engaging portion contacts the second engaging portion, the first protruding teeth extend into the second slot, and the second protruding teeth extend into the first slot.

[0010] Furthermore, from the end face of the second connecting portion to the direction away from the second connecting portion, the width of the first protruding tooth gradually increases, and the width of the first slot gradually decreases; from the end face of the cutter head portion to the direction away from the cutter head portion, the width of the second protruding tooth gradually increases, and the width of the second slot gradually decreases; when the first engaging portion is engaged with the second engaging portion, the contact surfaces between the first protruding tooth and the second slot, and between the second protruding tooth and the first slot are both inclined surfaces.

[0011] Furthermore, a recessed portion is formed on one of the first handle portion of the first handle and the second handle portion of the second handle, and a protruding portion is formed on the other of the first handle portion of the first handle and the second handle portion of the second handle, and the recessed portion and the protruding portion are both arranged on the sides opposite to the first handle and the second handle, and when the first handle contacts the second handle, the protruding portion extends into the recessed portion.

[0012] Furthermore, the cutter head portion includes a cutter head body and a cutter head, the cutter head body is formed with a receiving hole at one end facing the cutter head, a magnetic material for attracting the cutter head is formed in the receiving hole, and the cutter head is fixed in the receiving hole.

[0013] Furthermore, the cross section of the cutter head along the direction perpendicular to the axis is polygonal, and the shape of the cross section of the accommodating hole is adapted to the shape of the cross section of the cutter head.

[0014] Furthermore, the second handle is arranged between the cutter head and the first handle, and a connecting hole is formed at the end of the rotating shaft of the cutter head, and a bolt extends into the connecting hole to mount the second handle between the bolt and the cutter head.

[0015] In summary, in the present invention, when performing a screw-tightening operation, the blade head of the screwdriver is inserted into a narrow space and contacts the screw. Since the blade head is driven by the second handle to rotate around the axis of the blade head relative to the first handle, that is, the second handle will limit the rotation of the blade head around its own axis, a rotational force can be applied to the blade head through the second handle. Since the connecting portion of the first handle limits the movement of the blade head along its own axis, the first handle can apply pressure along the axis of the screw through the blade head. This can ensure that the blade head of the screwdriver is in stable contact with the screw when the screw is tightened, making it easier to complete the screw-tightening operation.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a screwdriver provided in an embodiment of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the screwdriver.

[0019] Figure 3 for Figure 1 Schematic diagram of the side view structure of the screwdriver.

[0020] Figure 4 for Figure 1 Schematic diagram of the top view of the screwdriver.

[0021] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the screwdriver in the VV direction.

[0022] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of the screwdriver in the VI-VI direction.

[0023] Figure 7 for Figure 1 Schematic diagram of the structure of the head of the screwdriver. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] The object of the present invention is to provide a screwdriver which can ensure stable contact between the screwdriver head 32 and the screw in a narrow space, thereby facilitating the screwing operation.

[0026] like Figures 1 to 3 As shown, the screwdriver provided by the embodiment of the present invention includes a first handle 10, a second handle 20 and a cutter head 30, and the cutter head 30 is connected to the first connection portion 11 of the first handle 10 and the second connection portion 21 of the second handle 20. The axis of the second handle 20 is perpendicular to the axis of the cutter head 30. Driven by the second handle 20, the cutter head 30 rotates around its own axis relative to the first connection portion 11 of the first handle 10, and the first connection portion 11 of the first handle 10 restricts the movement of the cutter head 30 along its own axis.

[0027] In this embodiment, when performing the screwing operation, the cutter head 30 of the screwdriver is inserted into a narrow space and contacts the screw. Since the cutter head 30 is driven by the second handle 20 to rotate relative to the first handle 10 around the axis of the cutter head 30, that is, in a direction perpendicular to the axis of the cutter head 30, the second handle 20 and the cutter head 30 can be fixed to each other, so that a rotational force can be applied to the cutter head 30 through the second handle 20. In addition, since the first connecting portion 11 of the first handle 10 can limit the movement of the cutter head 32 along its own axis, for example, the first handle 10 can apply pressure along the axis of the screw to the screw (or other threaded member) through the cutter head 30. This can ensure that the cutter head 30 of the screwdriver is in stable contact with the screw when the screw is screwed, so as to facilitate the screwing operation of the screw.

[0028] Preferably, the planes in which the longitudinal axes of the first handle 10 and the second handle 20 are located are parallel to each other to ensure that the first handle and the second handle can adapt to narrow spaces to the greatest extent. At this time, the longitudinal axes of the first handle 10 and the second handle 20 are parallel to the axis of the blade head 30.

[0029] Please continue to see Figure 2, Figure 5 and Figure 7 The cutter head 30 includes a cutter head body 31, a cutter head 32 and a rotating shaft 33. The cutter head 32 and the rotating shaft 33 are respectively arranged on the two end surfaces of the cutter head body 31. The first connecting portion 11 of the first handle 10 and the second connecting portion 21 of the second handle 20 are both provided with through holes, and the rotating shaft 33 passes through the through holes of the first connecting portion 11 and the second connecting portion 21. The rotating shaft fixing member 34 is combined with the rotating shaft 33, and the first handle 10 is clamped between the rotating shaft fixing member 34 and the cutter head 30, so that the first handle 10 limits the movement or movement trend of the cutter head 30 along its own axial direction. For further information, please continue to refer to Figure 2 and Figure 5 A gasket 37 is also provided at the end of the rotating shaft 33, and the gasket 37 is provided between the fixing member 34 of the rotating shaft, such as a bolt, and the first handle 10. In this embodiment, the axes of the cutter head body 31, the cutter head 32 and the rotating shaft 33 are located on the same straight line, that is, the axes of the cutter head 30, the cutter head body 31, the cutter head 32 and the rotating shaft 33 completely overlap to ensure the stability of their movement.

[0030] In this embodiment, the first handle 10 is located on the side of the second handle 20 away from the cutter head body 31, that is, the rotating shaft 33 first passes through the second connecting portion 21 and then extends into the first connecting portion 11, and the bolt extends into the connecting hole at the end of the rotating shaft 33, so that the first connecting portion 11 is sandwiched between the bolt and the rotating shaft 33. More specifically, a step surface 331 is formed on the rotating shaft 33, and the diameter of the end of the rotating shaft 33 away from the cutter head body 31 is smaller than the diameter of the end of the rotating shaft 33 close to the cutter head body 31. The first connecting portion 11 of the first handle 10 is sandwiched between the bolt and the step surface 331 to prevent the cutter head 30 from moving along its own axis relative to the first handle 10.

[0031] It is understandable that in other embodiments, the first handle 10 may also be located between the second handle 20 and the cutter head body 31. That is, the positions of the first handle 10 and the second handle 20 may be interchanged as long as one handle restricts the cutter head 30 from moving along the axis direction, while the other handle can drive the cutter head 30 to rotate around its own axis.

[0032] Please continue to see Figure 2 and Figure 3 In the present embodiment, a first clamping portion 23 is formed on the end surface of the second connection portion 21 facing the cutter head portion 30, and a second clamping portion 35 is formed on the end surface of the cutter head portion 30 facing the second connection portion 21. The second handle 20 can move relative to the cutter head portion 30 along the axial direction of the cutter head portion 30. When the first clamping portion 23 is combined with the second clamping portion 35, the second handle 20 can drive the cutter head portion 30 to rotate around the axis of the cutter head portion 30.

[0033] The second handle 20 has a certain free travel section on the rotating shaft 33 of the cutter head 30. In this embodiment, the free travel section is formed between the first handle 10 and the cutter head body 31. The length of the free travel section at least ensures that the second handle 20 can move along the axis direction of the cutter head 30 and make the first clamping part 23 escape from the second clamping part 35. When the first clamping part 23 escapes from the second clamping part 35, the second handle 20 can rotate relative to the cutter head 30 around the axis of the cutter head 30, that is, the second handle 20 no longer rotates with the cutter head 30.

[0034] By setting the first engaging portion 23, the second engaging portion 35, and the free travel section between the cutter head 30 and the first handle 10, the second handle 20 can be selectively combined with or separated from the cutter head 30. When combined, the second handle 20 and the cutter head 30 are integrated. By applying a force on the second handle 20, the screw can be driven to rotate by the cutter head 30; and when the first engaging portion 23 is disengaged from the second engaging portion 35, the second handle 20 can rotate relative to the cutter head 30. This enables the screwdriver provided by the embodiment of the present invention to be adapted to the situation where there is not enough space for the second handle 20 to rotate. In this situation, the second handle 20 can be driven by the second handle 20 to rotate a small angle, and then the second handle 20 can be separated from the cutter head 30 first, and then the second handle 20 can be returned to its original position and combined with the cutter head 30 again to continue to apply a rotational force to the screw.

[0035] In more detail, the first engaging portion 23 includes a plurality of first protruding teeth 231, which protrude from the end surface of the second connecting portion 21 toward the side where the cutter head portion 30 is located, and a first slot 232 is formed between two adjacent first protruding teeth 231. Similarly, the second engaging portion 35 includes a plurality of second protruding teeth 351, which protrude from the end surface of the cutter head portion 30 toward the side where the second connecting portion 21 is located, and a second slot 352 is formed between two adjacent second protruding teeth 351. When the first engaging portion 23 is combined with the second engaging portion 35, the first protruding teeth 231 extend into the second slot 352, and the second protruding teeth 351 extend into the first slot 232.

[0036] Please continue to refer to Figure 3, from the end face of the second connecting portion 21 to the direction away from the second connecting portion 21, the width of the first protruding tooth 231 gradually increases, and the width of the first clamping groove 232 gradually decreases; correspondingly, from the end face of the cutter head 30 to the direction away from the cutter head 30, the width of the second protruding tooth 351 gradually increases, and the width of the second clamping groove 352 gradually decreases. It can be understood that the width of the narrowest part of the first clamping groove 232 is greater than the width of the widest part of the second protruding tooth 351, and the width of the narrowest part of the second clamping groove 352 is greater than the width of the widest part of the first protruding tooth 231, so that the first clamping portion 23 and the second clamping portion 35 are convenient for clamping. When the first clamping portion 23 and the second clamping portion 35 are clamped, the contact surfaces between the first protruding tooth 231 and the second clamping groove 352 and between the second protruding tooth 351 and the first clamping groove 232 are both inclined surfaces. When the second handle 20 drives the cutter head 30 to rotate, the two inclined surfaces are in close contact, so that the second handle 20 can be connected to the cutter head 30. Stable. The inclination angle of the inclined surface can be adjusted according to different needs. Preferably, the inclination angle between the inclined surface and the axis of the cutter head 30 is 3° to 8°.

[0037] For further information, see Figure 3 and Figure 6 A recessed portion 24 is formed on one of the side of the first handle portion 12 of the first handle 10 facing the second handle 20 and the side of the second handle 22 of the second handle 20 facing the first handle 10, and a protruding portion 13 is formed on the other of the side of the first handle portion 12 of the first handle 10 facing the second handle 20 and the side of the second handle 22 of the second handle 20 facing the first handle 10. When the second handle 20 contacts the first handle 10, the protruding portion 13 can extend into the recessed portion 24, so that when the screwdriver is not in use, the second handle 20 and the first handle 10 can be prevented from rotating, which is convenient for storage.

[0038] In the present embodiment, a receiving hole 36 is formed at one end of the cutter head body 31 facing the cutter head 32, and a magnetic material is arranged in the receiving hole 36 to attract the cutter head 32 to prevent the cutter head 32 from falling off. When the cutter head 32 needs to be replaced, the old cutter head 32 is pulled out from the receiving hole 36, and the new cutter head 32 is reinserted to complete the replacement. The cross section of the cutter head 32 along the direction perpendicular to the axis can be a polygon, and the shape of the cross section of the receiving hole 36 is adapted to the cross section of the cutter head 32, so that the cutter head body 31 can better drive the cutter head 32 to rotate. That is, the rotation of the cutter head 32 is achieved by applying pressure to the cutter head 32 inside the receiving hole 36, and the magnetic material only ensures that the cutter head 32 stays in the receiving hole 36 to facilitate the replacement of the cutter head 32.

[0039] In this embodiment, the cutter head 32 is a cross cutter head, a slotted cutter head, a hexagonal cutter head, etc.

[0040] In summary, in the present invention, when performing a screw-tightening operation, the cutter head 30 of the screwdriver is inserted into a narrow space and contacts the screw. Since the cutter head 30 is driven by the second handle 20 to rotate relative to the first handle 10 around the axis of the cutter head 30, that is, the second handle 20 will limit the rotation of the cutter head 30 around its own axis, a rotational force can be applied to the cutter head 30 through the second handle 20. Since the connecting portion of the first handle 10 limits the movement of the cutter head 32 along its own axis, the first handle 10 can apply pressure along the axis of the screw through the cutter head 30. This can ensure that the cutter head 30 of the screwdriver is in stable contact with the screw when the screw is tightened, reduce or prevent the deviation of the screw, facilitate the screw-tightening operation, and improve the quality of the screw-tightening operation.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A screwdriver, characterized in that: The tool holder according to claim 1, wherein the first handle and the second handle are connected to each other, and the axis of the second handle is perpendicular to the axis of the tool holder. When the tool holder is driven by the second handle, the tool holder rotates relative to the first handle about its own axis, and the first handle limits the movement of the tool holder along its own axis. The tool holder according to claim 1, wherein the first handle and the second handle are connected to each other on two end surfaces of the tool holder body. Through holes are provided in the first connecting portion of the first handle and the second connecting portion of the second handle, and the rotating shaft passes through the through holes of the first connecting portion and the second connecting portion, and the fixing part of the rotating shaft is combined with the rotating shaft. A step surface is formed on the rotating shaft, and the diameter of the rotating shaft away from the end of the tool holder body is smaller than the diameter of the end of the rotating shaft close to the end of the tool holder body. The first handle is clamped between the fixing part of the rotating shaft and the The step surfaces are arranged between the two handles, so that the first handle can limit the movement or movement tendency of the cutting tool head along its own axial direction; a first clamping portion is formed on the end surface of the second handle facing the cutting tool head, and a second clamping portion is formed on the end surface of the cutting tool head facing the second handle. The second handle can move relative to the cutting tool head along the axial direction of the cutting tool head, and when the first clamping portion is combined with the second clamping portion, the second handle drives the cutting tool head to rotate around the axis of the cutting tool head; the second handle is arranged on the rotating shaft, and the second handle forms a free travel section on the rotating shaft of the cutting tool head, and the length of the free travel section at least ensures that the second handle can move along the axial direction of the cutting tool head and make the first clamping portion disengage from the second clamping portion. When the first clamping portion disengages from the second clamping portion, the second handle can rotate relative to the cutting tool head around the rotating shaft of the cutting tool head.

2. The screwdriver according to claim 1, characterized in that: The first engaging portion includes a plurality of first protruding teeth, which protrude from the end surface of the second connecting portion of the second handle toward the side where the blade head is located, and a first engaging groove is formed between two adjacent first protruding teeth. The second engaging portion includes a plurality of second protruding teeth, which protrude from the end surface of the blade head toward the side where the second connecting portion is located, and a second engaging groove is formed between two adjacent second protruding teeth. When the first engaging portion contacts the second engaging portion, the first protruding teeth extend into the second engaging groove, and the second protruding teeth extend into the first engaging groove.

3. The screwdriver according to claim 2, characterized in that: From the end face of the second connecting portion to the direction away from the second connecting portion, the width of the first protruding tooth gradually increases, and the width of the first slot gradually decreases; from the end face of the cutter head portion to the direction away from the cutter head portion, the width of the second protruding tooth gradually increases, and the width of the second slot gradually decreases; when the first engaging portion is engaged with the second engaging portion, the contact surfaces between the first protruding tooth and the second slot, and between the second protruding tooth and the first slot are both inclined surfaces.

4. The screwdriver according to claim 1, characterized in that: A recessed portion is formed on one of the first handle portion of the first handle and the second handle portion of the second handle, and a protruding portion is formed on the other of the first handle portion of the first handle and the second handle portion of the second handle. The recessed portion and the protruding portion are both arranged on the sides opposite to the first handle portion and the second handle portion. When the first handle contacts the second handle, the protruding portion extends into the recessed portion.

5. The screwdriver according to claim 1, characterized in that: A receiving hole is formed at one end of the cutter head body facing the cutter head, a magnetic material for attracting the cutter head is formed in the receiving hole, and the cutter head is fixed in the receiving hole.

6. The screwdriver according to claim 5, characterized in that: The cross section of the cutter head along the direction perpendicular to the axis is polygonal, and the shape of the cross section of the accommodating hole is adapted to the shape of the cross section of the cutter head.

7. The screwdriver according to claim 1, characterized in that: The second handle is arranged between the cutter head and the first handle. A connecting hole is formed at the end of the rotating shaft of the cutter head. A bolt extends into the connecting hole to mount the second handle between the bolt and the cutter head.

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