Improved precise meter repairing screwdriver

Abstract

The improved precise meter repairing screwdriver comprises a screwdriver handle, a connecting rod is arranged at the top of the screwdriver handle, the outer diameter of the connecting rod is smaller than that of the screwdriver handle, and a limiting step is formed at the connecting position of the connecting rod and the screwdriver handle. The connecting rod is coaxially provided with a cap head assembly, the cap head assembly comprises a cap head seat and a rotary cap head, the cap head seat comprises a cap crown part and a connecting pipe, the connecting pipe is formed and connected to the center position of the bottom of the cap crown part, and the connecting pipe is connected to the connecting rod in a sleeving mode and is in limiting fit with the limiting step; an open assembly cavity is formed in the top of the cap crown part, a bearing unit is clamped and embedded in the assembly cavity, an inserting rod is formed in the center of the bottom of the rotating cap head and is inserted into an inner ring of the bearing unit, and the rotating cap head is in rotating fit around the axis of the rotating cap head. Compared with the prior art, the structural strength of the precise screwdriver is improved, the falling fault risk is reduced, and the rotating smoothness of the top cap is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of watch repair tools, in particular to an improved precision watch repair screwdriver. Background Art

[0002] A watch screwdriver, also known as a watch screwdriver, is a precision screwdriver commonly used for delicate tasks such as repairing wristwatches. Watch screwdrivers typically have a small blade, allowing them to precisely reach into tight spaces and perform delicate screw removal and installation work.

[0003] In order to meet the delicate work requirements of watch repair, the top of the handle of an existing watch repair screwdriver is often provided with a top cap that is coaxially rotatable with the handle. There is a shaft at the center of the top of the handle, and the top cap is rotatably sleeved on the shaft. A plurality of balls are movably assembled at the edge of the top surface of the handle, and each ball rolls with the bottom surface of the top cap.

[0004] This simple bearing structure used in watch repair screwdrivers is prone to scattering when the top cap and the shaft become loose, causing off-axis rotation between the top cap and the handle, affecting the stability of the precision screwdriver during use. In addition, due to its poor structural strength, the watch repair screwdriver has a higher failure rate after an accidental drop. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an improved precision watch repair screwdriver, which improves the structural strength of the precision screwdriver, reduces the risk of falling failure, and improves the rotation smoothness of the top cap.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an improved precision watch repair screwdriver, including a handle, a connecting rod is provided on the top of the handle, the outer diameter of the connecting rod is smaller than the outer diameter of the handle, and a limit step is formed at the connection between the two; the connecting rod is coaxially assembled with a cap head assembly, the cap head assembly includes a cap head seat and a rotating cap head, the cap head seat includes a cap crown and a connecting tube, the connecting tube is formed and connected to the center position of the bottom of the cap crown, the connecting tube is sleeved on the connecting rod, and is limited by the limit step; an open assembly cavity is provided at the top of the cap crown, a bearing unit is embedded in the assembly cavity, and a plug-in rod is formed at the center position of the bottom of the rotating cap head, the plug-in rod is plugged into the inner ring of the bearing unit, and the rotating cap head rotates around its axis.

[0007] In a further technical solution, a middle thin rod is formed at the bottom end of the connecting rod, and a through head is formed at the bottom end of the middle thin rod. A buckling groove is formed between the through head and the connecting rod. The buckling groove is closed along the circumferential direction. An open retaining ring is installed in the buckle of the buckle groove. The edge of the open retaining ring protrudes from the outer wall of the connecting rod and cooperates with the limiting function of the bearing unit; the bottom edge of the through head is formed with a chamfer.

[0008] In a further technical solution, a raised separating convex ring is formed at the opening of the assembly cavity, the outer diameter of the separating convex ring is smaller than the outer diameter of the crown, the top surface of the separating convex ring is clearance-matched with the bottom surface of the rotating cap head, and a force groove is formed between the bottom surface of the rotating cap head and the top surface of the cap head seat for rigidly withdrawing the rotating cap head.

[0009] In a further technical solution, the top surface of the rotating cap head is formed with a finger pressure portion arranged in a concave spherical surface, the outer diameter of the finger pressure portion is slightly smaller than the outer diameter of the rotating cap head, and the forming depth of the finger pressure portion is 0.1mm-0.1mm.

[0010] In a further technical solution, the surface of the finger pressure part is formed with an anti-slip surface structure, which includes multiple annular grooves and / or annular protrusions spaced apart in the radial direction, and the total number of the annular grooves and / or annular protrusions is more than two.

[0011] In a further technical solution, a threaded connection portion is provided in the middle and upper part of the connecting rod, and an external thread is formed on the outer wall of the threaded connection portion; an internal thread is formed on the inner wall of the middle and upper part of the connecting tube, and the connecting tube is threaded on the threaded connection portion; the inner wall of the bottom of the connecting tube is loosely matched with the outer wall of the connecting rod, and the outer wall of the connecting tube is flush with the outer wall of the knife handle.

[0012] In a further technical solution, the projection shapes of the crown and the rotating hat head are the same, and are both equilateral hexagonal.

[0013] In a further technical solution, a clamping portion is formed on the outer wall of the tool handle, and a rough surface structure is formed on the outer wall of the clamping portion to enhance the clamping friction force.

[0014] In a further technical solution, a screwdriver assembly part is provided at the bottom of the handle, and a socket is formed on the end face of the screwdriver assembly part. The screwdriver assembly part is also formed with a radially arranged threaded hole, which passes through the socket inside and outside and is threadedly installed with a fastening screw; a cutter head is movably inserted into the socket, and the inner end of the fastening screw presses against the cutter head to fasten the cutter head.

[0015] In a further technical solution, the cutter head includes a slotted cutter head or a cross cutter head.

[0016] After adopting the above structure, the advantages of the present invention compared with the prior art are: the present invention provides an improved precision watch repair screwdriver, by arranging a bearing on the top of the handle and arranging a rotating cap head that rotates coaxially with the bearing, the rotation coaxiality, rotation smoothness and stability of the rotating cap head can be guaranteed, the watch repair screwdriver can be better clamped during use, and the user experience of the watch repair screwdriver can be further improved; the rotating cap head assembled and connected by the built-in bearing has better structural strength, and when the watch repair screwdriver accidentally falls, it is not easy to damage the rotating structure of the rotating cap head, further improving the durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 It is a cross-sectional schematic diagram of the present utility model.

[0020] Figure 3 yes Figure 2 Magnified view of point A in .

[0021] Figure 4 It is an exploded schematic diagram of the present utility model. DETAILED DESCRIPTION

[0022] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0023] like Figures 1 to 4 , 1. An improved precision watch repair screwdriver, comprising a handle 1, a connecting rod 13 is provided on the top of the handle 1, the outer diameter of the connecting rod 13 is smaller than the outer diameter of the handle 1, and a limited step is formed at the connection between the two; the connecting rod 13 is coaxially assembled with a cap head assembly, the cap head assembly comprises a cap head seat 3 and a rotating cap head 4, the cap head seat 3 comprises a cap crown portion 31 and a connecting tube 32, the connecting tube 32 is formed and connected to the center position of the bottom of the cap crown portion 31, the connecting tube 32 is sleeved on the connecting rod 13, and is limitedly matched with the limiting step; an open assembly cavity 310 is opened at the top of the cap crown portion 31, a bearing unit 5 is embedded and installed in the assembly cavity 310, and a plug-in rod 41 is formed at the center position of the bottom of the rotating cap head 4, the plug-in rod 41 is plugged into the inner ring of the bearing unit 5, and the rotating cap head 4 rotates around its axis.

[0024] By arranging a bearing unit 5 on the top of the shank 1 and arranging a coaxially rotating rotating cap head 4 through the bearing unit 5, the rotation coaxiality, rotation smoothness and stability of the rotating cap head 4 can be ensured, and the watch repair screwdriver can be better clamped during use, which can further improve the user experience of the watch repair screwdriver.

[0025] Specifically, a middle thin rod is formed at the bottom end of the plug-in rod 41, and a through head 411 is formed at the bottom end of the middle thin rod. A buckling groove 412 is formed between the through head 411 and the plug-in rod 41. The buckling groove 412 is closed along the circumferential direction, and an open retaining ring 6 is snap-fitted into the buckling groove 412. The edge of the open retaining ring 6 protrudes from the outer wall of the plug-in rod 41 and cooperates with the limiting function of the bearing unit 5; the bottom edge of the through head 411 is chamfered.

[0026] By providing an open retaining ring 6 at the end of the plug rod 41, the plug rod 41 can be prevented from accidentally withdrawing from the bearing unit 5, causing damage and separation of the rotating cap head 4, further improving the assembly strength and stability of the rotating cap head 4.

[0027] The rotating cap head 4 assembled and connected by the built-in bearing unit 5 has better structural strength. When the watch repair screwdriver accidentally falls, it is not easy to damage the rotating structure of the rotating cap head 4, further improving the durability of the product.

[0028] Specifically, a raised separating ring 311 is formed at the opening of the assembly cavity 310. The outer diameter of the separating ring 311 is smaller than the outer diameter of the crown portion 31. The top surface of the separating ring 311 is clearance-matched with the bottom surface of the rotating cap head 4. A force groove is formed between the bottom surface of the rotating cap head 4 and the top surface of the cap head seat 3 for rigidly withdrawing the rotating cap head 4.

[0029] The force groove is formed to facilitate the rigid disassembly of the rotating cap head 4. The user only needs to use tools such as diagonal pliers to engage the force groove and apply force upward. The rotating cap head 4 and the bearing unit 5 will be separated from the cap head seat 3 at the same time. The operation is simple and convenient for disassembly and maintenance.

[0030] Specifically, a finger pressing portion 42 is formed on the top surface of the rotating cap head 4 in a concave spherical shape. The outer diameter of the finger pressing portion 42 is slightly smaller than the outer diameter of the rotating cap head 4 , and the forming depth of the finger pressing portion 42 is 0.5 mm.

[0031] Specifically, an anti-skid surface structure 421 is formed on the surface of the finger-pressing portion 42 . The anti-skid surface structure 421 includes a plurality of annular grooves spaced apart along the radial direction, and the total number of the annular grooves is five.

[0032] Specifically, a threaded connection part 131 is provided in the middle and upper part of the connecting rod 13, and the outer wall of the threaded connection part 131 is formed with an external thread; the inner wall of the middle and upper part of the connecting tube 32 is formed with an internal thread, and the connecting tube 32 is threaded on the threaded connection part 131; the inner wall of the bottom of the connecting tube 32 is loosely matched with the outer wall of the connecting rod 13, and the outer wall of the connecting tube 32 is flush with the outer wall of the handle 1.

[0033] Specifically, the projection shapes of the crown portion 31 and the rotating cap head 4 are the same, and are both equilateral hexagonal.

[0034] Specifically, a clamping portion 11 is formed on the outer wall of the tool handle 1 , and a rough surface structure is formed on the outer wall of the clamping portion 11 to enhance the clamping friction force.

[0035] Specifically, a screwdriver assembly part 12 is provided at the bottom of the handle 1, and a socket 20 is formed on the end face of the screwdriver assembly part 12. The screwdriver assembly part 12 is also formed with a radially arranged threaded hole 22, which passes through the socket 20 inside and outside and is threadedly installed with a fastening screw 21; a cutter head 2 is movably inserted into the socket 20, and the inner end of the fastening screw 21 presses against the cutter head 2 to fasten the cutter head 2.

[0036] Specifically, the cutter head 2 includes but is not limited to a slotted cutter head and a cross cutter head, and cutter heads 2 of other types and specifications can be selected according to actual use requirements.

[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. An improved precision watch repair screwdriver, comprising a handle (1), characterized in that: A connecting rod (13) is provided on the top of the knife handle (1), the outer diameter of the connecting rod (13) is smaller than the outer diameter of the knife handle (1), and a limited step is formed at the connection between the two; a cap head assembly is coaxially assembled on the connecting rod (13), and the cap head assembly includes a cap head seat (3) and a rotating cap head (4). The cap head seat (3) includes a cap crown portion (31) and a connecting pipe (32). The connecting pipe (32) is molded and connected to the center position of the bottom of the cap crown portion (31). The connecting pipe (32) is sleeved on the connecting rod (13) and is limitedly matched with the limiting step. The top of the cap crown portion (31) is provided with an open assembly cavity (310). A bearing unit (5) is embedded in the assembly cavity (310). A plug-in rod (41) is formed at the center of the bottom of the rotating cap head (4). The plug-in rod (41) is plugged into the inner ring of the bearing unit (5), and the rotating cap head (4) rotates around its axis.

2. The improved precision watch repair screwdriver according to claim 1, characterized in that: The bottom end of the plug rod (41) is formed with an intermediate thin rod, and the bottom end of the intermediate thin rod is formed with a through head (411), and a buckle groove (412) is formed between the through head (411) and the plug rod (41), and the buckle groove (412) is closed along the circumferential direction. An open retaining ring (6) is buckled and installed in the buckle groove (412), and the edge of the open retaining ring (6) protrudes from the outer wall of the plug rod (41) and cooperates with the limit of the bearing unit (5); The bottom edge of the through-head (411) is formed with a chamfer.

3. The improved precision watch repair screwdriver according to claim 2, characterized in that: A raised separating convex ring (311) is formed at the opening of the assembly cavity (310); the outer diameter of the separating convex ring (311) is smaller than the outer diameter of the cap crown (31); the top surface of the separating convex ring (311) is clearance-matched with the bottom surface of the rotating cap head (4); a force groove is formed between the bottom surface of the rotating cap head (4) and the top surface of the cap head seat (3) for rigidly withdrawing the rotating cap head (4).

4. The improved precision watch repair screwdriver according to claim 3, characterized in that: The top surface of the rotating cap head (4) is formed with a finger pressing portion (42) arranged in a concave spherical surface. The outer diameter of the finger pressing portion (42) is slightly smaller than the outer diameter of the rotating cap head (4). The forming depth of the finger pressing portion (42) is 0.1mm-0.1mm.

5. The improved precision watch repair screwdriver according to claim 4, characterized in that: The surface of the finger-pressing portion (42) is formed with an anti-skid surface structure (421), and the anti-skid surface structure (421) includes a plurality of annular grooves and / or annular protrusions spaced apart in a radial direction, and the total number of the annular grooves and / or annular protrusions is more than two.

6. The improved precision watch repair screwdriver according to claim 1, characterized in that: The middle and upper part of the connecting rod (13) is provided with a threaded connection part (131), and the outer wall of the threaded connection part (131) is formed with an external thread; the inner wall of the middle and upper part of the connecting tube (32) is formed with an internal thread, and the connecting tube (32) is threaded on the threaded connection part (131); the inner wall of the bottom of the connecting tube (32) is loosely matched with the outer wall of the connecting rod (13), and the outer wall of the connecting tube (32) is flush with the outer wall of the handle (1).

7. The improved precision watch repair screwdriver according to claim 1, characterized in that: The cap crown (31) and the rotating cap head (4) have the same projection shape, and are both equilateral hexagonal.

8. The improved precision watch repair screwdriver according to claim 1, characterized in that: The outer wall of the knife handle (1) is formed with a clamping portion (11), and the outer wall of the clamping portion (11) is formed with a rough surface structure for enhancing the clamping friction force.

9. The improved precision watch repair screwdriver according to claim 1, characterized in that: The bottom of the tool handle (1) is provided with a screwdriver assembly part (12), the end surface of the screwdriver assembly part (12) is formed with a socket (20), and the screwdriver assembly part (12) is also formed with a radially arranged threaded hole (22), the threaded hole (22) is passed through the socket (20) inside and outside, and a fastening screw (21) is threadedly installed; a cutter head (2) is movably inserted into the socket (20), and the inner end of the fastening screw (21) abuts against the cutter head (2) to fasten the cutter head (2).

10. An improved precision watch repair screwdriver according to claim 9, characterized in that: The cutter head (2) comprises a slotted cutter head or a cross cutter head.

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