Precise meter repairing screwdriver with dustproof structure

Abstract

The precise meter repairing screwdriver with the dustproof structure comprises a screwdriver handle and a top cap body, a connecting part is formed at the top end of the screwdriver handle, the connecting part comprises a shaft core penetrating rod and a connecting rod from top to bottom, and the shaft core penetrating rod is provided with at least one bearing unit in a series connection mode; the outer diameter of the connecting rod is smaller than that of the cutter handle, an assembling step is formed, a connecting pipe is arranged at the bottom of the top cap body, the interior of the connecting pipe is hollowed out to form a connecting cavity, after the top cap body is assembled, outer rings of the bearing units are clamped and assembled in the connecting cavity, and the top end of the shaft core penetrating rod is in limiting fit with the top face of the connecting cavity. The inner wall of the connecting cavity is in clearance fit with the outer wall of the connecting rod, the end face of the connecting pipe is in clearance fit with the transverse face of the assembling step, and a labyrinth ring dustproof structure is formed. Compared with the prior art, the rotating top cap of the precise meter repairing screw driver has better rotating smoothness, is provided with a labyrinth ring dust removing structure, and can reduce pollution of external dust to an internal bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of watch repair tools, in particular to a precision watch repair screwdriver with a dustproof structure. Background Art

[0002] Precision watch screwdrivers are often used for disassembling and repairing small components like watches. They feature small or specialized blades, offering the advantage of stable clamping. Existing precision watch screwdrivers consist of a handle, a blade, and a rotating cap. The cap is rotatably mounted on the top of the handle, with a bearing structure between the cap and the handle. The cap rotates around the handle's axis, providing a finger pressure point for the user to press against the cap during use, stabilizing the screwdriver.

[0003] The bearing structure of this precision watch repair screwdriver is prone to dust. After long-term use, the dust may cause the bearing to rotate unsmoothly, and even reduce the coaxiality of the rotating shaft of the top cap. When in use, it is difficult to maintain the stability of the handle and the cutter head, which greatly affects the use and is difficult to clean and repair. Therefore, it is necessary to improve it. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a precision watch repair screwdriver with a dustproof structure, thereby improving the dustproof performance of the bearing structure inside the precision watch repair screwdriver, increasing the service life of the precision watch repair screwdriver, and reducing its maintenance difficulty.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a precision watch repair screwdriver with a dust-proof structure, comprising a shank and a top cap body, a connecting part formed on the top end of the shank, the connecting part comprising an axial core through rod and a connecting rod from top to bottom, the axial core through rod is serially connected with at least one bearing unit; the outer diameter of the connecting rod is smaller than the outer diameter of the shank, and an assembly step is formed, a connecting tube is provided at the bottom of the top cap body, the interior of the connecting tube is hollowed out to form a connecting cavity, after the top cap body is assembled, the outer rings of each bearing unit are respectively embedded and assembled in the connecting cavity, and the top end of the axial core through rod is limitedly matched with the top surface of the connecting cavity, after the top cap body is assembled, the inner wall of the connecting cavity is clearance-matched with the outer wall of the connecting rod, the end face of the connecting tube is clearance-matched with the transverse surface of the assembly step, and a labyrinth ring dust-proof structure is formed.

[0006] In a further technical solution, a groove is formed at the end of the shaft core through rod, and a retaining spring is installed in the groove. The retaining spring protrudes from the outer wall of the shaft core through rod and cooperates with the bearing unit to block it.

[0007] In a further technical solution, the outer diameter of the shaft through rod is smaller than the outer diameter of the connecting rod, and a limit step is formed at the connection between the two; the number of bearing units is more than two, and the inner ring of each bearing unit is respectively sleeved on the shaft through rod, and the highest bearing unit is blocked by a retaining spring, and the lowest bearing unit is limited by the limit step.

[0008] In a further technical solution, the connecting cavity includes a clamping cavity and a rotary sleeve cavity arranged upper and lower. The inner diameter of the clamping cavity is smaller than the inner diameter of the rotary sleeve cavity. A chamfer is formed at the connection between the two. The outer ring of each bearing unit is interference fit with the inner wall of the clamping cavity; the inner wall of the rotary sleeve cavity and the outer wall of the connecting rod are clearance fit to form a labyrinth ring dustproof structure.

[0009] In a further technical solution, the fitting clearance of the labyrinth ring dustproof structure is no more than 0.1 mm.

[0010] In a further technical solution, the upper part of the top hat body is formed with a crown portion protruding outward, and a dividing groove is opened in the middle position of the crown portion. The crown portion is formed with an upper crown body and a lower crown body arranged up and down with the dividing groove as the boundary to improve the holding stability.

[0011] In a further technical solution, the projection shapes of the upper crown and the lower crown are the same in size, and their projection shapes are regular hexagons respectively.

[0012] In a further technical solution, the knife handle is provided with a gripping portion, which includes a rough surface structure formed on the outer wall of the knife handle for enhancing gripping friction.

[0013] In a further technical solution, a screwdriver assembly part is provided at the bottom of the handle, a socket is formed on the end face of the screwdriver assembly part, a threaded hole is opened on the side of the screwdriver assembly part, and the threaded hole passes through the socket; the screwdriver assembly part is provided with a fastening screw and a cutter head, the cutter head is movably inserted into the socket, the fastening screw is threadedly assembled in the threaded hole, and the inner end of the fastening screw presses against the cutter head to fasten the cutter head.

[0014] In a further technical solution, the ends of different cutting heads are respectively provided with twisting heads of different shapes and specifications, and the twisting heads include a flat head, a cross head, a plum head, a triangle head, a hexagon head, a Pozi head or a star head.

[0015] After adopting the above structure, the advantages of the present invention compared with the prior art are: the present invention provides a precision watch repair screwdriver with a dustproof structure, which reduces the entry of external dust into the internal bearing structure by forming a labyrinth ring dustproof structure between the shank and the top cap body, thereby improving the rotational stability of the top cap body; the top cap body is clamped and assembled on the bearing on the shaft core through rod, which can be easily withdrawn, reducing the difficulty of disassembly and maintenance of the internal bearing structure; the bearing unit is blocked by the retaining spring, further reducing the difficulty of disassembly and maintenance of the bearing structure; the top cap body is directly assembled and connected to the bearing unit, and its rotation is smoother, which can further improve the usability of the precision watch repair screwdriver. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Figure 2 It is a cross-sectional view of the present utility model.

[0019] Figure 3 yes Figure 2 Magnified view of point A in . DETAILED DESCRIPTION

[0020] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0021] like Figures 1 to 3 As shown, a precision watch repair screwdriver with a dust-proof structure includes a shank 4 and a top cap body 1. A connecting portion is formed at the top of the shank 4, and the connecting portion includes an axial core through rod 42 and a connecting rod 41 from top to bottom. The axial core through rod 42 is serially provided with at least one bearing unit 3; the outer diameter of the connecting rod 41 is smaller than the outer diameter of the shank 4, and an assembly step is formed. A connecting tube 11 is provided at the bottom of the top cap body 1, and the interior of the connecting tube 11 is hollowed out to form a connecting cavity 15. After the top cap body 1 is assembled, the outer rings of each bearing unit 3 are respectively embedded and assembled in the connecting cavity 15, and the top end of the axial core through rod 42 is limitedly matched with the top surface of the connecting cavity 15. After the top cap body 1 is assembled, the inner wall of the connecting cavity 15 is clearance-matched with the outer wall of the connecting rod 41, and the end face of the connecting tube 11 is clearance-matched with the transverse surface of the assembly step, and a labyrinth ring dust-proof structure 40 is formed.

[0022] The labyrinth ring dust shield 40 has an L-shaped cross-section on either side. It comprises a vertical portion and a horizontal portion. The horizontal portion's length matches the horizontal plane of the assembly step, while the vertical portion's length matches the length of the connecting rod 41. This labyrinth ring dust shield 40 requires a sufficiently long vertical portion to maintain dust-proof performance. Experiments have shown that a vertical portion length of at least 3 mm, while in this embodiment, the vertical portion's length is 4 mm, resulting in a labyrinth ring dust shield 40 with excellent dust-proof performance.

[0023] The top cap 1 is clamped onto the bearing unit 3 on the shaft through rod 42, allowing for easy removal, reducing the difficulty of disassembly and maintenance of the internal bearing structure. The top cap 1, directly mounted on the bearing unit 3, rotates more smoothly, further improving the usability of the precision watch screwdriver.

[0024] Specifically, a slot 43 is formed at the end of the shaft core through rod 42, and a retaining spring 2 is mounted in the retaining groove 43. The retaining spring 2 protrudes from the outer wall of the shaft core through rod 42 and blocks the bearing unit 3. By blocking the bearing unit 3 with the retaining spring 2, the difficulty of disassembling and maintaining the bearing structure is further reduced.

[0025] Specifically, the outer diameter of the shaft core through rod 42 is smaller than the outer diameter of the connecting rod 41, and a limiting step is formed at the connection between the two; the number of bearing units 3 is more than two, and the inner ring of each bearing unit 3 is respectively sleeved on the shaft core through rod 42, and the highest bearing unit 3 is blocked by the retaining spring 2, and the lowest bearing unit 3 is limited by the limiting step.

[0026] Specifically, the connecting cavity 15 includes a clamping cavity 151 and a rotary sleeve cavity 152 arranged upper and lower. The inner diameter of the clamping cavity 151 is smaller than the inner diameter of the rotary sleeve cavity 152. A chamfer 153 is formed at the connection between the two. The outer ring of each bearing unit 3 is interference fit with the inner wall of the clamping cavity 151; the inner wall of the rotary sleeve cavity 152 and the outer wall of the connecting rod 41 are clearance fit to form a labyrinth ring dustproof structure 40.

[0027] Specifically, the fitting clearance of the labyrinth ring dustproof structure 40 is no greater than 0.1 mm.

[0028] By forming a labyrinth ring dustproof structure 40 between the shank 4 and the top cap body 1 , the risk of external dust entering the internal bearing structure is reduced, thereby improving the rotational stability of the top cap body 1 .

[0029] The fitting clearance of the labyrinth ring dustproof structure 40 in this embodiment is 0.05 mm, which can avoid excessive coaxiality of the top cap body 1 caused by the accuracy and assembly error of the bearing unit 3, and at the same time ensure its dustproof performance is in good condition.

[0030] The molding structure of the top cap body 1 in this embodiment has also been functionally improved. Specifically, the upper part of the top cap body 1 is formed with a crown portion protruding outward, and a dividing groove 13 is provided in the middle position of the crown portion. The crown portion is formed with an upper crown body and a lower crown body arranged upper and lower with the dividing groove 13 as the boundary to improve the grip stability; the projection shapes of the upper crown body and the lower crown body are the same in size, and their projection shapes are regular hexagons respectively.

[0031] It has a double-layer structure with an upper crown and a lower crown. After replacing the top cap of different sizes, the user can snap and fix the dividing groove 13 with a storage tool for easy storage and retention. The function of the regular hexagonal crown is to prevent the precision watch repair screwdriver from rotating at will and causing it to fall when it is placed flat on the table.

[0032] The knife handle 4 in this embodiment has an anti-slip structure. Specifically, the knife handle 4 is provided with a gripping portion 5. The gripping portion 5 includes a rough surface structure formed on the outer wall of the knife handle 4 for enhancing gripping friction.

[0033] The cutter head 7 of the precision watch repair screwdriver in this embodiment is replaceable, and the user can replace the cutter head 7 with one of different specifications and sizes according to actual use requirements.

[0034] Specifically, a screwdriver assembly portion 6 is provided at the bottom of the handle 4, an insertion hole 61 is formed on the end surface of the screwdriver assembly portion 6, and a threaded hole 62 is opened on the side of the screwdriver assembly portion 6, and the threaded hole 62 passes through the insertion hole 61;

[0035] The screwdriver assembly portion 6 is provided with a fastening screw 71 and a cutter head 7 . The cutter head 7 is movably inserted into the insertion hole 61 . The fastening screw 71 is threadedly assembled into the threaded hole 62 , and the inner end of the fastening screw 71 abuts against the cutter head 7 to fasten and assemble the cutter head 7 .

[0036] The ends of different cutting heads 7 are provided with twisting heads of different shapes and specifications, and the twisting heads include a slotted head, a cross head, a plum head, a triangle head, a hexagonal head, a Pozidriv head or a star head.

[0037] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A precision watch repair screwdriver with a dustproof structure, comprising a handle (4) and a top cap (1), characterized in that: The top end of the knife handle (4) is formed with a connecting portion, which includes an axial core through rod (42) and a connecting rod (41) from top to bottom. The axial core through rod (42) is serially connected with at least one bearing unit (3). The outer diameter of the connecting rod (41) is smaller than the outer diameter of the knife handle (4) and forms an assembly step. A connecting tube (11) is provided at the bottom of the top cap body (1), and the interior of the connecting tube (11) is hollowed out to form a connecting cavity (15). After the top cap body (1) is assembled, the outer rings of the bearing units (3) are respectively snap-fitted into the connecting cavity (15), and the top end of the shaft core through rod (42) is limitedly matched with the top surface of the connecting cavity (15). After the top cap body (1) is assembled, the inner wall of the connecting cavity (15) and the outer wall of the connecting rod (41) are clearance-matched, and the end face of the connecting pipe (11) and the transverse face of the assembly step are clearance-matched, thereby forming a labyrinth ring dustproof structure (40).

2. The precision watch repair screwdriver with a dustproof structure according to claim 1, characterized in that: A clamping groove (43) is formed at the end of the shaft core through rod (42), and a clamping spring (2) is installed in the clamping groove (43). The clamping spring (2) protrudes from the outer wall of the shaft core through rod (42) and blocks and cooperates with the bearing unit (3).

3. The precision watch repair screwdriver with a dustproof structure according to claim 2, characterized in that: The outer diameter of the shaft core through rod (42) is smaller than the outer diameter of the connecting rod (41), and a limiting step is formed at the connection between the two; the number of the bearing units (3) is more than two, and the inner ring of each bearing unit (3) is respectively sleeved on the shaft core through rod (42), and the highest bearing unit (3) is blocked and matched with the retaining spring (2), and the lowest bearing unit (3) is limited and matched with the limiting step.

4. The precision watch repair screwdriver with a dustproof structure according to claim 3, characterized in that: The connecting cavity (15) includes a clamping cavity (151) and a rotary sleeve cavity (152) arranged above and below. The inner diameter of the clamping cavity (151) is smaller than the inner diameter of the rotary sleeve cavity (152). A chamfer (153) is formed at the connection between the two. The outer ring of each bearing unit (3) is interference-fitted with the inner wall of the clamping cavity (151); the inner wall of the rotary sleeve cavity (152) and the outer wall of the connecting rod (41) are clearance-fitted to form the labyrinth ring dustproof structure (40).

5. The precision watch repair screwdriver with a dustproof structure according to claim 4, characterized in that: The matching clearance of the labyrinth ring dustproof structure (40) is no greater than 0.1 mm.

6. The precision watch repair screwdriver with a dustproof structure according to claim 1, characterized in that: The upper portion of the top cap body (1) is formed with a crown portion protruding outward, a separation groove (13) is provided in the middle of the crown portion, and the crown portion is formed with an upper crown body and a lower crown body arranged above and below, with the separation groove (13) as the boundary, so as to improve the grip stability.

7. The precision watch repair screwdriver with a dustproof structure according to claim 6, characterized in that: The projection shapes of the upper crown and the lower crown are the same in size and are respectively regular hexagons.

8. The precision watch repair screwdriver with a dustproof structure according to claim 1, characterized in that: The knife handle (4) is provided with a gripping portion (5), and the gripping portion (5) comprises a rough surface structure formed on the outer wall of the knife handle (4) for enhancing gripping friction.

9. The precision watch repair screwdriver with a dustproof structure according to claim 1, characterized in that: The bottom of the shank (4) is provided with a screwdriver assembly portion (6), the end surface of the screwdriver assembly portion (6) is formed with a socket (61), the side of the screwdriver assembly portion (6) is provided with a threaded hole (62), and the threaded hole (62) passes through the socket (61); The screwdriver assembly portion (6) is provided with a fastening screw (71) and a cutter head (7). The cutter head (7) is movably plugged into the insertion hole (61). The fastening screw (71) is threadedly assembled into the threaded hole (62). The inner end of the fastening screw (71) abuts against the cutter head (7) to fasten and assemble the cutter head (7).

10. The precision watch repair screwdriver with a dustproof structure according to claim 9, characterized in that: The ends of different blade heads (7) are respectively provided with twisting heads of different shapes and specifications, and the twisting heads respectively include a flat head, a cross head, a plum head, a triangle head, a hexagon head, a Pozi head or a star head.

Images