Clock spring positioning mechanism

Abstract

The invention relates to the technical field of automobile parts, in particular to a clock spring positioning mechanism. The mechanism comprises an inner ring, an upper cover and a positioning pin, the positioning pin comprises a supporting plate, the supporting plate is provided with a handheld piece and a pushing piece which extend upwards, the bottom face of the supporting plate is provided with an insertion positioning structure, a rotation limiting piece and an axial limiting piece which extend downwards, and the insertion positioning structure and the rotation limiting piece are arranged in parallel. An open mounting position and a closed mounting position are arranged on the inner ring, and a first mounting position and a second mounting position are correspondingly arranged on the upper cover; the insertion limiting structure comprises a plug connector and a stop block mounted on the plug connector; the top surface of the open mounting position and one side deviating from the center of the inner ring are opened, the top surface of the closed mounting position is opened, and the upper part of the side surface deviating from the center of the inner ring is provided with a limiting plate for limiting upward movement of the baffle block. The technical problem that in the prior art, a positioning pin cannot be repeatedly used, so that a clock spring and a combination switch cannot be subjected to a rotation test after being assembled is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories, in particular to a clock spring positioning mechanism. Background Art

[0002] The clock spring is a key component connecting the multi-function buttons on the car's steering wheel and the airbag. It is usually installed under the steering wheel. When the steering wheel rotates left and right, it can ensure the stable connection of the circuits of electronic components such as the airbag and horn switch, ensuring that the airbag can be deployed in the event of a collision to protect the lives of the driver and passengers.

[0003] Because the rotor in the clock spring rotates a fixed number of times, it must be centered during installation. If the clock spring is not installed in the center position, the flat cable can easily be torn or damaged when the steering wheel is turned, causing the airbag circuit to disconnect or the steering wheel control signal to be lost, ultimately affecting the normal operation of the vehicle's safety systems and driver assistance features. Currently, a dowel pin is typically used to lock the clock spring before the steering wheel is installed to prevent the rotor from rotating. Once the clock spring is in place, the dowel pin is removed to enable the clock spring to function normally. This locking method is prone to incorrect insertion and removal of the pin, affecting the normal use of the steering wheel.

[0004] To address the above-mentioned issues, patent document CN213948352U discloses a clock spring locating pin structure, which includes a rotor and stator connected for relative rotation, a 7-shaped locating pin, a hollow locating cover on the outer wall of the stator, a locating block on the end face of the rotor located at the position of the locating cover, a groove on the end face of the locating block, and a corresponding locating protrusion on the bottom face of the horizontal arm of the locating pin corresponding to the groove. The vertical arm of the locating pin is inserted into the locating cover, and the outer edge of the vertical arm exposed outside the locating cover is provided with a fracture. A clamping block is provided on one end face of the lower part of the vertical arm located inside the locating cover, and a clamping slot is provided on the locating cover corresponding to the clamping block. When in use, the vertical arm of the locating pin is inserted into the locating cover and the locating protrusion on the horizontal arm is inserted into the groove to lock the clock spring. The cooperation between the clamping slot and the clamping block prevents accidental insertion and removal.

[0005] However, once inserted into the clock spring, the locating pin is difficult to remove. During vehicle production, after the clock spring and combination switch are assembled, the combination switch manufacturer must remove the locating pin from the clock spring, perform a rotation test, and then, after passing the test, reinstall the removed locating pin on the clock spring before sending the switch to the vehicle manufacturer for final assembly. This locating pin cannot meet the requirements for reuse. Summary of the Invention

[0006] The present invention provides a clock spring positioning mechanism to solve the technical problem in the prior art that the positioning pin cannot be reused, resulting in the inability to perform a rotation test on the clock spring and the combination switch after assembly.

[0007] To solve the above problems, the clock spring positioning mechanism provided by the present invention adopts the following technical solutions:

[0008] A clock spring positioning mechanism comprises an inner ring, an upper cover and a positioning pin;

[0009] The positioning pin includes a support plate, a handpiece, an insertion positioning structure, a pushing member, a rotation limiter and an axial limiter. The handpiece and the pushing member are both arranged on the top surface of the support plate and extend upward. The bottom surface of the support plate is provided with an insertion positioning structure, a rotation limiter and an axial limiter. The insertion positioning structure and the rotation limiter are arranged in parallel and both extend downward. The axial limiter is located between the rotation limiter and the support plate.

[0010] The inner ring is provided with an open mounting position and a closed mounting position for inserting the insertion positioning structure, and the upper cover is provided with a first mounting position and a second mounting position for inserting the rotation limiter and corresponding to the open mounting position and the closed mounting position respectively;

[0011] The insertion limiting structure includes a plug-in connector and a stopper mounted on the plug-in connector, and the cross-sectional dimension of the axial limiting member is greater than the cross-sectional dimension of the rotation limiting member;

[0012] The open mounting position is open on one side away from the center of the inner ring, and the upper portion of the side of the closed mounting position away from the center of the inner ring is provided with a limiting plate for limiting the upward movement of the stopper;

[0013] The first installation position is closed on a side facing away from the open installation position, and the second installation position is open on a side facing away from the closed installation position and closed on a side facing the closed installation position.

[0014] Beneficial effects: 1. By providing an open mounting position on the inner ring and a first mounting position corresponding to the open mounting position on the upper cover, and closing the side of the first mounting position away from the open mounting position, the inner ring can be rotated to the centering position when the clock spring is first shipped from the factory, so that the open mounting position is aligned with the position of the first mounting position, and the insertion positioning structure is inserted into the open mounting position. The open mounting position is only open on the top surface and the side away from the center of the inner ring, that is, the open mounting position only allows the insertion positioning structure to move in the vertical direction and the direction away from the center of the inner ring, and cannot be displaced along the left or right side of the open mounting position; the rotation limiter is inserted into the first mounting position, the first mounting position can limit the rotation of the rotation limiter, and the axial limiter limits the excessive downward movement of the rotation limiter, thereby limiting the axial displacement of the rotation of the inner ring, ensuring that the inner ring is always positioned at the centering position of the clock spring during transportation, and after the clock spring and the combination switch are assembled, the rotation limiter can be separated from the first mounting position, and the insertion positioning structure can be removed from the open mounting position to unlock the clock spring, thereby ensuring the normal progress of the subsequent rotation test;

[0015] 2. By providing a closed installation position on the inner ring and a second installation position corresponding to the closed installation position on the upper cover, the insertion positioning structure can be inserted into the closed installation position after the rotation test of the clock spring and the combination switch is completed. At this time, due to the presence of the limit plate, the stopper of the insertion positioning structure cannot move upward, thereby limiting the upward movement of the insertion positioning structure. The rotation limiter is inserted into the second installation position. The second installation position can limit the rotation of the rotation limiter, and the axial limiter can limit the excessive downward movement of the rotation limiter, so as to ensure that the locating pin can position the inner ring in the center position of the clock spring.

[0016] 3. When the clock spring enters the car factory for installation, push the pusher to disconnect the handpiece from the insertion positioning structure. The insertion positioning structure remains on the inner ring, and the rotation limiter disengages from the second installation position as the pusher moves. The clock spring is unlocked, and the clock spring can rotate with the steering wheel on the vehicle.

[0017] Furthermore, the handpiece and the insertion positioning structure are connected via a connecting section.

[0018] Furthermore, a fracture groove is provided on the connecting section.

[0019] Beneficial effects: 1. By setting a fracture groove on the connecting section, a pre-designed weak point is formed at the position of the fracture groove in the connecting section, ensuring that after the insertion positioning structure is inserted into the closed installation position, when the push member is pushed, it can fracture at the fracture groove, avoiding the occurrence of random fractures, thereby avoiding the failure of the clock spring caused by random fractures; 2. Setting a fracture groove on the connecting section can ensure the rapid separation of the support plate and the insertion positioning structure, without the need for complex tools or high-cost processes, thereby improving the separation efficiency; 3. Setting a fracture groove on the connecting section can ensure that when the push member is pushed, it will crack first at the fracture groove, preventing damage to components such as the axial limit member; 4. Setting a fracture groove on the connecting section, the residual section of the fracture groove after the fracture cannot be restored, which can avoid the car manufacturer from misusing the damaged pin body.

[0020] Furthermore, the pushing member is provided with a horizontally extending positioning protrusion.

[0021] Beneficial effect: The pushing member is provided with a positioning protrusion, which can increase the friction between the operator's finger and the surface of the pushing member when pushing the pushing member, making it easier to push the pushing member.

[0022] Furthermore, there are multiple positioning protrusions, and the multiple positioning protrusions are arranged at intervals along the circumference of the pushing member.

[0023] Furthermore, the pushing member has an opening, and the positioning protrusion is located outside the opening.

[0024] Furthermore, the hand piece is perpendicular to the pushing piece.

[0025] Furthermore, a plurality of anti-slip strips are provided on the handpiece.

[0026] Beneficial effects: By setting anti-slip strips on the handpiece, the friction between the operator's fingers and the handpiece can be increased, significantly reducing the risk of hand slippage. The pressure on the operator's fingers when holding the handpiece can be evenly dispersed, avoiding local pressure. The anti-slip strips and the finger contact surface form multi-point support, improving operation accuracy.

[0027] Furthermore, the longitudinal section of the axial limiting member is trapezoidal.

[0028] Furthermore, the longitudinal section of the stopper is a right-angled trapezoid, and the hypotenuse thereof extends obliquely upward from the connector.

[0029] Beneficial effects: The longitudinal section of the block is a right-angled trapezoid, and its hypotenuse extends obliquely upward from the connector. The hypotenuse can provide guidance for the rapid installation of the connector to avoid assembly errors. After the connector is installed, the hypotenuse and the right-angled side can be used to form a geometric interlock to reduce the risk of loosening. Compared with a rectangular section, the design of the right-angled trapezoidal section reduces material usage and reduces costs, but retains the strength of key areas, achieving a balance between lightweight and durability of the block.

[0030] The clock spring positioning mechanism provided by the present invention has the following beneficial effects:

[0031] 1. An open mounting position is provided on the inner ring, and a first mounting position is provided on the upper cover, so that the first mounting position corresponds to the open mounting position, and the side thereof facing away from the open mounting position is closed. When the clock spring is first shipped from the factory, the inner ring is rotated to the centering position, the insertion positioning structure is inserted into the open mounting position, and the displacement of the insertion positioning structure along the left or right side of the open mounting position is limited by the open mounting position. The rotation limiter is inserted into the first mounting position, and the rotation of the rotation limiter is limited by the first mounting position. The excessive downward movement of the rotation limiter is limited by the axial limiter, thereby limiting the axial displacement of the rotation of the inner ring. This can ensure that the inner ring is always positioned at the centering position of the clock spring during transportation, and after the clock spring and the combination switch are assembled, the rotation limiter can be separated from the first mounting position and the insertion positioning structure can be separated from the open mounting position to unlock the clock spring, thereby ensuring the normal progress of the subsequent rotation test.

[0032] 2. A closed mounting position is provided on the inner ring, and a second mounting position is provided on the upper cover, so that the second mounting position corresponds to the closed mounting position and the side facing away from the closed mounting position is closed. After the rotation test of the clock spring and the combination switch is completed, the insertion positioning structure is inserted into the closed mounting position and the rotation limiter is inserted into the second mounting position. At this time, due to the presence of the limit plate, the stopper of the insertion positioning structure cannot move upward or rotate, thereby limiting the upward movement or rotation of the insertion positioning structure, and further limiting the axial displacement and rotation of the positioning pin, so as to ensure that the positioning pin can position the inner ring in the center position of the clock spring;

[0033] 3. When the clock spring enters the car factory for installation, push the pusher to disconnect the handpiece from the insertion positioning structure and the rotation limiter from the second installation position. The insertion positioning structure is left on the inner ring, and the clock spring is unlocked, so that the clock spring can rotate with the steering wheel on the vehicle.

[0034] 4. By providing a fracture groove on the connecting section, a weak point is formed at the fracture groove position. This ensures that after the insertion positioning structure is inserted into the closed installation position, the positioning pin can be broken at the fracture groove when the pusher is pushed, thus avoiding the occurrence of random fracture. It can also ensure the rapid separation of the support plate and the insertion positioning structure without the need for complex tools or high-cost processes, greatly improving the separation efficiency. It can also ensure that when the pusher is pushed, it will crack first at the fracture groove, preventing damage to components such as the axial limiter. The residual section of the fracture groove cannot be restored after the fracture, which can prevent the car manufacturer from misusing the damaged pin body.

[0035] 5. By providing a positioning protrusion on the pusher, the friction between the operator's finger and the pusher can be increased, making it easier to push the pusher;

[0036] 6. By providing anti-slip strips on the handpiece, the anti-slip strips and the finger contact surface can form multi-point support, thereby increasing the friction between the operator's fingers and the handpiece, significantly reducing the risk of hand slippage and improving operational accuracy. At the same time, the pressure on the operator's fingers when holding the handpiece can be evenly distributed, avoiding localized pressure and improving the operator's comfort.

[0037] 7. The longitudinal section of the block is designed to be a right-angled trapezoid, and its hypotenuse extends upward from the connector. The hypotenuse can provide guidance for the rapid installation of the connector and avoid assembly errors. Compared with the rectangular section, the right-angled trapezoidal section design can also reduce material consumption and manufacturing costs, achieving a balance between lightweight and durability of the block.

[0038] In summary, the clock spring positioning mechanism provided by the present invention can realize the function of being reusable after being pulled out in an open installation position and then reinstalled, and can also realize the function of not being able to be reinstalled and used again after being taken out in a closed installation position, thereby effectively solving the technical problem in the prior art that the positioning pin cannot be reused, resulting in the inability to perform a rotation test on the clock spring and combination switch after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0040] Figure 1 Schematic diagram of the application structure of the clock spring positioning mechanism provided by the present invention Figure 1 ;

[0041] Figure 2 Schematic diagram of the application structure of the clock spring positioning mechanism provided by the present invention Figure 2 ;

[0042] Figure 3 This is a structural schematic diagram of the positioning pin in the clock spring positioning mechanism provided by the present invention;

[0043] Figure 4 A top view of a positioning pin in a clock spring positioning mechanism provided by the present invention;

[0044] Figure 5 This is a schematic structural diagram of the inner ring and upper cover of the clock spring positioning mechanism provided by the present invention;

[0045] Figure 6 for Figure 5 A partial enlarged schematic diagram of point A in the middle;

[0046] Figure 7 for Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0047] Figure 8 This is a schematic structural diagram of the positioning pin in the clock spring positioning mechanism provided by the present invention during the breaking process.

[0048] Description of reference numerals:

[0049] 1. Inner ring; 2. Upper cover; 3. Hand piece; 4. Connector; 5. Stopper; 6. Pusher; 7. Positioning protrusion; 8. Rotation limiter; 9. Axial limiter; 10. Open mounting position; 11. Closed mounting position; 12. First mounting position; 13. Second mounting position; 14. Limiting plate; 15. Connecting section; 16. Fracture groove; 17. Opening; 18. Support plate; 19. Anti-slip strip; 20. Guide strip. DETAILED DESCRIPTION

[0050] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0051] The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0052] The embodiment of the clock spring positioning mechanism provided by the present invention is as follows:

[0053] like Figures 1 to 8 As shown, the clock spring positioning mechanism includes an inner ring 1, an upper cover 2 and a positioning pin.

[0054] Regarding the positioning pin. The positioning pin includes a support plate 18, a handpiece 3, an insertion positioning structure, a pusher 6, a rotation limiter 8, and an axial limiter 9. The handpiece 3 and the pusher 6 are both arranged on the top surface of the support plate 18 and extend upward. The bottom surface of the support plate 18 is provided with an insertion positioning structure, a rotation limiter 8, and an axial limiter 9. The insertion positioning structure and the rotation limiter 8 are arranged in parallel and both extend downward. The axial limiter 9 is located between the rotation limiter 8 and the support plate 18. In this embodiment, the axial limiter 9 is staggered with the pusher 6 in the vertical direction and coaxially arranged with the rotation limiter 8, and the axial limiter 9 is located between the handpiece 3 and the pusher 6 in the horizontal direction.

[0055] About inserting positioning structure. Figure 3 As shown, the insertion positioning structure includes a connector 4 and a stopper 5 mounted on the connector 4. In this embodiment, the longitudinal section of the stopper 5 is a right-angled trapezoid, with its hypotenuse extending obliquely upward from the connector 4; in other embodiments, the longitudinal section of the stopper 5 is a triangle.

[0056] In this embodiment, the connector 4 is a cylindrical structure, and guide strips 20 are provided on both opposite sides to provide guidance for the installation of the connector 4; in other embodiments, the connector 4 is a rectangular structure, and guide strips 20 are not required on its sides.

[0057] About inner circle 1. Figures 5 to 7 As shown, the inner ring 1 is provided with an open mounting position 10 and a closed mounting position 11 for inserting and positioning the inserting structure. The open mounting position 10 has an opening 17 on its top surface and on one side facing away from the center of the inner ring 1. The closed mounting position 11 also has an opening 17 on its top surface, and a stop plate 14 on its upper portion facing away from the center of the inner ring 1, which limits the upward movement of the stopper 5. In this embodiment, the stop plate 14 at the closed mounting position 11 is a curved plate to match the connector 4. In other embodiments, where the connector 4 is a rectangular parallelepiped, the stop plate 14 at the closed mounting position 11 is a straight plate.

[0058] About the upper cover 2. Figures 5 to 7 As shown, the upper cover 2 is provided with a first mounting position 12 and a second mounting position 13 for inserting the rotation limit member 8 and corresponding to the open mounting position 10 and the closed mounting position 11 respectively; the first mounting position 12 is closed on the side facing away from the open mounting position 10, and the second mounting position 13 is open on the side facing away from the closed mounting position 11 and closed on the side facing the closed mounting position 11.

[0059] In this embodiment, a limiting plate 14 is provided on a side of the second installation position 13 facing the closed installation position 11 to close the side and prevent the rotation limiting member 8 from moving from the side toward the closed installation position 11 .

[0060] Regarding the pusher 6. Figure 3 As shown, the pusher 6 is provided with a positioning protrusion 7 to increase the friction between the operator's finger and the surface of the pusher 6, facilitating its advancement. In this embodiment, there are multiple positioning protrusions 7, spaced apart along the circumference of the pusher 6; in other embodiments, there is only one positioning protrusion 7. In this embodiment, the pusher 6 is also provided with an opening 17, with the positioning protrusion 7 located outside of the opening 17.

[0061] like Figure 3 As shown, in this embodiment, the handpiece 3 and the insertion positioning structure (in this embodiment, between the handpiece 3 and the top surface of the connector 4) are connected by a connecting section 15; in order to ensure that the positioning pin cannot be pulled out after being inserted into the closed mounting position 11 and can only be broken off, a breaking groove 16 is provided on the connecting section 15, so that the strength of the connecting section 15 at the breaking groove 16 is the lowest, which is convenient for breaking at this point when the pushing member 6 is pushed, avoiding random breakage, allowing the insertion positioning structure to remain in the closed mounting position 11, and preventing damage to components such as the axial limit member 9 during the pushing process.

[0062] like Figure 3 and Figure 4 As shown, in this embodiment, the handpiece 3 and the pushing member 6 are arranged vertically, and a plurality of anti-slip strips 19 are provided on the handpiece 3. The anti-slip strips 19 are used to form multi-point support with the finger contact surface, thereby increasing the friction between the operator's fingers and the handpiece 3, reducing the risk of hand slippage, improving operation accuracy, and evenly dispersing the pressure of the operator's fingers when holding the handpiece 3, thereby avoiding local pressure.

[0063] In this embodiment, the longitudinal section of the axial limit member 9 is trapezoidal, and the size of its top surface is larger than the size of its bottom surface; in this embodiment, the size of the bottom surface of the axial limit member 9 is larger than the size of the bottom surface of the rotation limit member 8.

[0064] The working principle of the clock spring positioning mechanism provided by the present invention is:

[0065] When the clock spring is first shipped from the factory, the inner ring 1 is first rotated to the centering position. At this time, the open mounting position 10 on the inner ring 1 is aligned with the first mounting position 12 on the upper cover 2. The operator holds the handle 3 of the positioning pin, aligns it with the open mounting position 10 and presses it down, so that the insertion positioning structure is inserted into the open mounting position 10. The rotation limiter 8 is clamped into the first mounting position 12, and the bottom surface of the axial limiter 9 contacts the top surface of the first mounting position 12 to limit the rotation and excessive downward movement of the inner ring 1, ensuring that the inner ring 1 is positioned in the centering position of the clock spring.

[0066] When the clock spring enters the combination switch manufacturer, the operator first holds the positioning pin handle 3 and moves it vertically upward to disengage the positioning pin from the inner ring 1. At this time, the clock spring is unlocked and can be subjected to rotation testing. After the test is completed, the operator holds the positioning pin handle 3, aligns it with the closed installation position 11 and presses it. At this time, the insertion positioning structure is installed in the closed installation position 11, the rotation limiter 8 is clamped in the second installation position 13, and the bottom surface of the axial limiter 9 contacts the top surface of the second installation position 13, limiting the rotation and axial displacement of the inner ring 1, ensuring that the inner ring 1 is positioned in the center position of the clock spring.

[0067] When the clock spring is sent to the car factory for installation, the operator holds the pusher 6 of the positioning pin and applies force to the pusher 6 toward the handpiece 3. After the pusher 6 is pushed to a certain angle, the connecting section 15 is disconnected at the breaking groove 16, and the rotation limiter 8 is disengaged from the second installation position 13. At this time, the stopper 5 cannot move upward due to the presence of the limit plate 14. The stopper 5 and the connector 4 are left in the closed installation position 11. The clock spring is unlocked and can rotate with the steering wheel when in use.

[0068] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings of this specification. They are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0069] In addition, in the description of this specification, “a plurality of” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A clock spring positioning mechanism, characterized in that: Including inner ring, upper cover and positioning pin; The positioning pin includes a support plate, a handpiece, an insertion positioning structure, a pushing member, a rotation limiter and an axial limiter. The handpiece and the pushing member are both arranged on the top surface of the support plate and extend upward. The bottom surface of the support plate is provided with an insertion positioning structure, a rotation limiter and an axial limiter. The insertion positioning structure and the rotation limiter are arranged in parallel and both extend downward. The axial limiter is located between the rotation limiter and the support plate. The inner ring is provided with an open mounting position and a closed mounting position for inserting the insertion positioning structure, and the upper cover is provided with a first mounting position and a second mounting position for inserting the rotation limiter and corresponding to the open mounting position and the closed mounting position respectively; The insertion limiting structure includes a plug-in connector and a stopper mounted on the plug-in connector, and the cross-sectional dimension of the axial limiting member is greater than the cross-sectional dimension of the rotation limiting member; The open mounting position is open on one side away from the center of the inner ring, and the upper portion of the side of the closed mounting position away from the center of the inner ring is provided with a limiting plate for limiting the upward movement of the stopper; The first installation position is closed on a side facing away from the open installation position, and the second installation position is open on a side facing away from the closed installation position and closed on a side facing the closed installation position.

2. The clock spring positioning mechanism according to claim 1, characterized in that: The hand piece is connected to the insertion positioning structure via a connecting section.

3. The clock spring positioning mechanism according to claim 2, characterized in that: The connecting section is provided with a fracture groove.

4. The clock spring positioning mechanism according to any one of claims 1 to 3, characterized in that: The pushing member is provided with a horizontally extending positioning protrusion.

5. The clock spring positioning mechanism according to claim 4, characterized in that: There are multiple positioning protrusions, and the multiple positioning protrusions are arranged at intervals along the circumference of the pushing member.

6. The clock spring positioning mechanism according to claim 4, characterized in that: The pushing member is provided with an opening, and the positioning protrusion is located outside the opening.

7. The clock spring positioning mechanism according to any one of claims 1 to 3, characterized in that: The handheld member is perpendicular to the pushing member.

8. The clock spring positioning mechanism according to any one of claims 1 to 3, characterized in that: A plurality of anti-slip strips are provided on the hand piece.

9. The clock spring positioning mechanism according to any one of claims 1 to 3, characterized in that: The longitudinal section of the axial limiting member is trapezoidal.

10. The clock spring positioning mechanism according to any one of claims 1 to 3, characterized in that: The longitudinal section of the stopper is a right-angled trapezoid, and the hypotenuse thereof extends obliquely upward from the connector.

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