High-stability magnetic screwdriver bit

Abstract

The utility model discloses a high-stability magnetic attraction screwdriver bit, which relates to the technical field of screwdriver bit structures and particularly comprises a screwdriver bit piece, a connecting column is movably connected to the outer cambered surface of the screwdriver bit piece in a penetrating manner, a hexagonal groove is connected to the middle of the surface of one side of the connecting column in a penetrating manner, concave-convex teeth are arranged on one side of the outer cambered surface of the connecting column, and the outer cambered surface of each concave-convex tooth is movably sleeved with an operation sleeve. By controlling the moving distance of the operation sleeve, the caulking grooves in the outer cambered surface of the connecting column and the caulking grooves in the outer cambered surface of the operation sleeve are staggered, so that the groove distance between the staggered caulking grooves is shortened, the spherical clamping piece is clamped, the spherical clamping piece in the caulking grooves moves due to movement of the operation sleeve, and the spherical clamping piece is clamped. And the spherical clamping piece can be pressed down when the spherical clamping piece makes contact with the receding groove in the inner arc face of the matching sleeve, so that the spherical clamping piece is clamped after moving obliquely downwards according to the motion trail, the inserted screwdriver head piece is fixed, the situation that the screwdriver head is disengaged from the inserting groove when being blocked by an object is prevented, and then the using stability of the screwdriver head is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of screwdriver bit structures, in particular to a high-stability magnetic screwdriver bit. Background Art

[0002] The bit replacement mechanism is a commonly used bit locking device for power tools. Its main function is to allow power tools to replace bits of different sizes and models to meet processing needs.

[0003] The bit locking device is generally a three-jaw chuck type, screw type; that is, when replacing the bit, it is necessary to first unlock the bit, keep it unlocked, then insert the bit, and then release the unlocked state to lock the bit, so the operation is cumbersome. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a high-stability magnetic screwdriver bit, which has the advantages of being easy to replace the screwdriver bit and ensuring stable use of the screwdriver bit.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a high-stability magnetic screwdriver bit includes a screwdriver bit part, the outer arc surface of the screwdriver bit part is movably connected with a connecting column, the middle part of one side surface of the connecting column is penetrated and connected with a hexagonal groove, one side of the outer arc surface of the connecting column is provided with concave-convex teeth, the outer arc surface of the concave-convex teeth is movably sleeved with an operating sleeve, an annular groove is provided at the edge of one side of the outer arc surface of the operating sleeve, the inner arc surface of the annular groove is movably connected with an annular connecting plate, a compression spring is fixedly installed on one side surface of the annular connecting plate, an embedding groove is provided on the side of the connecting column close to the concave-convex teeth, the outer arc surface of the operating sleeve is provided with the same embedding groove, a boss portion is provided at one end of the outer arc surface of the operating sleeve, and a matching sleeve is overlapped on the surface of the boss portion.

[0006] Optionally, a convex ridge is provided in the middle of the inner arc surface of the mating sleeve, and the surface of the convex ridge is fixedly overlapped with one end of the compression spring. The concave and convex teeth on the outer arc surface of the connecting column are matched with the inner arc surface of the operating sleeve. The concave and convex teeth on the surface of the connecting column are used to increase the friction between the connecting column and the operating sleeve, and the friction between the connecting column and the mating sleeve is increased through the annular connecting plate inside the operating sleeve, thereby improving the connection stability between the various components and ensuring that there will be no sliding or detachment during use.

[0007] Optionally, a retreat groove is provided on one side of the matching sleeve close to the convex ridge portion, the retreat groove corresponds to the embedding groove on the outer arc surface of the operating sleeve, and a spherical clamp is movably pressed against the inner arc surface of the retreat groove.

[0008] Optionally, the outer arc surface of the spherical clamp penetrates into the interior of the embedding groove and is movably overlapped on the surface of the screwdriver bit. The number of the spherical clamps is two and they are distributed on both sides of the screwdriver bit in a mirror-symmetrical manner.

[0009] Optionally, the outer arc surface of the spherical clamp is slidably engaged in the embedding groove, and the matching sleeve and the operating sleeve are in the same plane.

[0010] Optionally, an annular magnet is movably connected to the outer arc surface of the operating sleeve close to the boss portion, and the annular magnet is movably placed in the retreat groove.

[0011] Optionally, the outer arc surface of the mating sleeve is provided with an end portion, which corresponds to the annular magnet, and the screwdriver bit piece extends to the outside of the mating sleeve. The movable distance of the operating sleeve is controlled in order to misalign the embedding groove of the outer arc surface of the connecting column with the embedding groove of the outer arc surface of the operating sleeve, thereby shortening the groove distance between the dislocated embedding grooves and clamping the spherical clamp. The movement of the operating sleeve will cause the spherical clamp in the embedding groove to be displaced, and the spherical clamp will be pressed down when it contacts the retreat groove of the inner arc surface of the mating sleeve. Therefore, the movement trajectory of the spherical clamp is to move obliquely downward and then clamp, thereby fixing the screwdriver bit piece after insertion to prevent the screwdriver bit from detaching from the insertion groove when blocked by an object, thereby ensuring the stability of the screwdriver bit when used.

[0012] The utility model provides a high-stability magnetic screwdriver bit, which has the following beneficial effects:

[0013] 1. The concave and convex teeth on the surface of the connecting column increase the friction with the operating sleeve, and the annular connecting plate inside the operating sleeve increases the friction with the matching sleeve, thereby improving the connection stability between the various components and ensuring that there will be no sliding or detachment during use.

[0014] 2. The purpose of controlling the movable distance of the operating sleeve is to displace the embedding groove on the outer arc surface of the connecting column and the embedding groove on the outer arc surface of the operating sleeve, thereby shortening the groove distance between the displaced embedding grooves and clamping the spherical clamp. The movement of the operating sleeve will cause the spherical clamp in the embedding groove to displace, and when it contacts the retreat groove on the inner arc surface of the matching sleeve, it will press down the spherical clamp, so that the movement trajectory of the spherical clamp is to move obliquely downward and then clamp, thereby fixing the screwdriver bit after insertion to prevent the screwdriver bit from detaching from the insertion groove when blocked by objects, thereby ensuring the stability of the screwdriver bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the planar structure of the utility model.

[0020] In the figure: 1, screwdriver bit; 2, connecting column; 3, hexagonal groove; 4, concave and convex teeth; 5, operating sleeve; 6, annular groove; 7, annular connecting plate; 8, compression spring; 9, embedded groove; 10, boss portion; 11, matching sleeve; 12, convex ridge portion; 13, retreat groove; 14, spherical clamp; 15, end portion; 16, annular magnet. DETAILED DESCRIPTION

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a high-stability magnetic screwdriver bit, including a screwdriver bit part 1, a connecting column 2 is movably connected to the outer arc surface of the screwdriver bit part 1, and a hexagonal groove 3 is connected to the middle part of one side surface of the connecting column 2. A concave-convex tooth 4 is provided on one side of the outer arc surface of the connecting column 2. An operating sleeve 5 is movably sleeved on the outer arc surface of the concave-convex tooth 4. An annular groove 6 is provided at the edge of one side of the outer arc surface of the operating sleeve 5. An annular connecting plate 7 is movably connected to the inner arc surface of the annular groove 6. A compression spring 8 is fixedly installed on the surface of one side of the annular connecting plate 7. An embedding groove 9 is provided on the side of the connecting column 2 close to the concave-convex tooth 4. The outer arc surface of the operating sleeve 5 is provided with the same embedding groove 9. A boss portion 10 is provided at one end of the outer arc surface of the operating sleeve 5. A matching sleeve 11 is overlapped on the surface of the boss portion 10. A convex ridge portion 12 is provided in the middle part of the inner arc surface of the matching sleeve 11. The surface of the convex ridge portion 12 is fixedly overlapped with one end of the compression spring 8. The concave-convex tooth 4 on the outer arc surface of the connecting column 2 is adapted to the inner arc surface of the operating sleeve 5.

[0023] The concave-convex teeth 4 on the surface of the connecting column 2 increase the friction with the operating sleeve 5, and the annular connecting plate 7 inside the operating sleeve 5 increases the friction with the matching sleeve 11, thereby improving the connection stability between the various components and ensuring that there will be no sliding or separation during use.

[0024] A retreat groove 13 is provided on one side of the matching sleeve 11 near the convex ridge portion 12, and the retreat groove 13 corresponds to the embedding groove 9 on the outer arc surface of the operating sleeve 5. A spherical clamp 14 is movably pressed against the inner arc surface of the retreat groove 13, and the outer arc surface of the spherical clamp 14 penetrates into the interior of the embedding groove 9 and is movably overlapped on the surface of the screwdriver bit 1. There are two spherical clamps 14, which are mirror-symmetrically distributed on both sides of the screwdriver bit 1. The outer arc surface of the spherical clamp 14 is slidably clamped in the embedding groove 9. The matching sleeve 11 and the operating sleeve 5 are in the same plane, and the outer arc surface of the operating sleeve 5 near the boss portion 10 is movably connected with an annular magnet 16, which is movably placed in the retreat groove 13. An end 15 is provided on the outer arc surface of the matching sleeve 11, and the end 15 corresponds to the annular magnet 16, and the screwdriver bit 1 penetrates to the outside of the matching sleeve 11.

[0025] The purpose of controlling the movable distance of the operating sleeve 5 is to misalign the embedding groove 9 on the outer arc surface of the connecting column 2 with the embedding groove 9 on the outer arc surface of the operating sleeve 5, so that the groove distance between the dislocated embedding grooves 9 is shortened, and the spherical clamp 14 is clamped. The movement of the operating sleeve 5 will cause the spherical clamp 14 in the embedding groove 9 to be displaced, and when it contacts the retreat groove 13 on the inner arc surface of the matching sleeve 11, the spherical clamp 14 will be pressed down, so that the movement trajectory of the spherical clamp 14 is to move obliquely downward and then clamp, so as to fix the screwdriver bit 1 after being plugged in, so as to prevent the screwdriver bit from being detached from the plug-in groove when being blocked by an object, thereby ensuring the stability of the screwdriver bit in use.

[0026] In the utility model, the working steps of the device are as follows:

[0027] The connecting column 2 is passed through the operating sleeve 5, and the concave-convex teeth 4 on the surface will contact one side of the inner arc surface of the operating sleeve 5, thereby increasing the friction force. The annular connecting plate 7 will be sleeved in the annular groove 6 on the outer arc surface of the operating sleeve 5, and at this time, the outer arc surface of the annular connecting plate 7 is provided with a concave-convex groove, thereby increasing the friction with the matching sleeve 11. A compression spring 8 is fixed on one side of the annular connecting plate 7 to control the movable distance of the operating sleeve 5. The movable distance of the operating sleeve 5 is controlled in order to displace the embedding groove 9 on the outer arc surface of the connecting column 2 with the embedding groove 9 on the outer arc surface of the operating sleeve 5, so that the displaced embedding groove 9 The groove distance between them is shortened, and the spherical clamping piece 14 is clamped. The movement of the operating sleeve 5 will cause the spherical clamping piece 14 in the embedded groove 9 to be displaced. When it contacts the retreat groove 13 on the inner arc surface of the matching sleeve 11, the spherical clamping piece 14 will be pressed down, so that the movement trajectory of the spherical clamping piece 14 is to move obliquely downward and then clamped. At this time, the screwdriver head 1 in the connecting column 2 will be connected and fixed due to the clamping spherical clamping pieces 14 on both sides, and the annular magnet 16 at this time will further absorb and connect the screwdriver head 1. When it needs to be removed, you only need to push the connecting column 2 backward to release the compression spring 8 and restore the deformation.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-stability magnetic screwdriver bit, comprising a screwdriver bit part (1), characterized in that: The outer arc surface of the screwdriver head (1) is movably connected with a connecting column (2), and a hexagonal groove (3) is connected to the middle of one side surface of the connecting column (2). One side of the outer arc surface of the connecting column (2) is provided with a concave-convex tooth (4), and the outer arc surface of the concave-convex tooth (4) is movably sleeved with an operating sleeve (5). An annular groove (6) is provided at the edge of one side of the outer arc surface of the operating sleeve (5), and an annular connecting plate (7) is movably connected to the inner arc surface of the annular groove (6). A compression spring (8) is fixedly installed on one side surface of the annular connecting plate (7). A side of the connecting column (2) close to the concave-convex tooth (4) is provided with an embedding groove (9), and the outer arc surface of the operating sleeve (5) is provided with a same embedding groove (9). A boss portion (10) is provided at one end of the outer arc surface of the operating sleeve (5), and a matching sleeve (11) is overlapped on the surface of the boss portion (10).

2. The high-stability magnetic screwdriver bit according to claim 1, characterized in that: A convex ridge (12) is provided in the middle of the inner arc surface of the matching sleeve (11), the surface of the convex ridge (12) is fixedly overlapped with one end of the compression spring (8), and the concave and convex teeth (4) on the outer arc surface of the connecting column (2) are adapted to the inner arc surface of the operating sleeve (5).

3. A high-stability magnetic screwdriver bit according to claim 2, characterized in that: A retreat groove (13) is provided on one side of the matching sleeve (11) close to the ridge portion (12), the retreat groove (13) corresponds to the embedding groove (9) on the outer arc surface of the operating sleeve (5), and a spherical clamping piece (14) is movably pressed against the inner arc surface of the retreat groove (13).

4. The high-stability magnetic screwdriver bit according to claim 3, characterized in that: The outer arc surface of the spherical clamp (14) penetrates into the interior of the embedding groove (9) and is movably overlapped on the surface of the screwdriver bit (1). The number of the spherical clamp (14) is two and they are distributed on both sides of the screwdriver bit (1) in a mirror-symmetrical manner.

5. The high-stability magnetic screwdriver bit according to claim 4, characterized in that: The outer arc surface of the spherical clamp (14) is slidably clamped in the embedding groove (9), and the matching sleeve (11) and the operating sleeve (5) are in the same plane.

6. The high-stability magnetic screwdriver bit according to claim 5, characterized in that: The outer arc surface of the operating sleeve (5) close to the boss portion (10) is movably connected to an annular magnet (16), and the annular magnet (16) is movably placed in the retreat groove (13).

7. The high-stability magnetic screwdriver bit according to claim 6, characterized in that: The outer arc surface of the matching sleeve (11) is provided with an end portion (15), the end portion (15) corresponds to the annular magnet (16), and the screwdriver bit (1) penetrates to the outside of the matching sleeve (11).

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