File clip contact pin, file clip connector and root canal measuring instrument
By setting a groove and mounting hole at the tail of the file clamp pin and fixing the connecting wire through the notch, the problem of easy loosening of the file clamp pin and the connecting wire in the file clamp connector head is solved, achieving higher connection reliability and tensile and detachment effect.
Patent Information
- Application Number
- CN202420638893.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The file pin and the connecting wire in the existing file clamp connector are prone to loosen when connected to each other, resulting in a decrease in connection stability, greatly increasing the possibility of connection disconnection, and greatly reducing the reliability of file clamps.
A file clamp pin is designed, and the mounting hole extending in the axis direction of the tail of the material is used in conjunction with the groove on the outer side wall. The connecting wire is fixedly connected to the file clamp pin through the notch, which increases the effective contact area of the insulating layer in the clamped state and enhances the axial resistance.
The setting of the groove part increases the fit and tightness between the file clamp pin and the connecting line, the axial tension-resistant effect is better, and the connection reliability is higher. At the same time, the file clamp connector head can be put into the clamping state with a smaller force, saving time and effort.
Smart Images
Figure CN222604733U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oral medical equipment, in particular to a file clamp inserting pin, a file clamp connecting head and a root canal measuring instrument. Background Art
[0002] Root canal length measurement is an auxiliary medical device used by dentists to measure the length of tooth root canals. It is used to help dentists complete the actual length measurement from the root canal to the apex of the tooth before root canal treatment. In actual use, root canal files, measuring wires, file clamps, lip hooks, probe rods and other parts are generally required to cooperate. However, when the file clamp pin and the connecting wire in the current file clamp connector are connected to each other, due to the large tolerance of the connecting wire, the fit is prone to be too loose, which in turn leads to reduced connection stability and a greatly increased possibility of disconnection. The reliability of the file clamp is greatly reduced, which can easily make the entire file clamp unusable, thereby affecting the root canal length measurement work before root canal treatment. Utility Model Content
[0003] The utility model aims to provide a file clamp pin, a file clamp connector and a root canal measuring instrument, which solve the problem that the file clamp pin and the connecting wire in the existing file clamp connector are easily loosened when connected to each other.
[0004] The above-mentioned purpose of the utility model can be achieved by adopting the following technical solutions:
[0005] The utility model provides a file clamp pin, comprising:
[0006] A main body extending in the axial direction, the main body having corresponding head and tail portions in the axial direction, the tail portion being formed with a mounting hole extending in the axial direction, and at least one groove portion extending in the axial direction and recessed in the radial direction of the mounting hole being formed on the outer side wall of the tail portion, at least part of the groove portion corresponding to the mounting hole in the axial direction.
[0007] Furthermore, a notch portion connected to the mounting hole is provided on the outer side wall of the main body, and the notch portion is arranged at an end away from the tail portion, and the notch portion is used to connect the connecting wire inserted into the mounting hole with the file clip pin in a fixed manner.
[0008] Preferably, the wall thickness of the needle segment on the tail portion where the mounting hole is formed is 0.1 mm to 0.4 mm.
[0009] Specifically, on the needle segment having the mounting hole formed on the tail portion, the side wall thickness of the body corresponding to the groove portion is smaller than the side wall thickness of the body without the groove portion formed.
[0010] Preferably, there are four groove portions, and the four groove portions are evenly distributed along the circumferential direction of the file clamp pin.
[0011] Another object of the utility model is to provide a file clamp connector, the file clamp connector comprising: a connecting wire and the file clamp pin;
[0012] The connecting wire comprises a wire core and an insulating layer covering the outer side of the wire core. The connecting wire can be inserted into the mounting hole and can be connected with the file clamp pin in a fixed manner through the notch.
[0013] Specifically, after the file clamp pin and the connecting wire are assembled and clamped, the inner wall of the mounting hole corresponding to the groove portion is interference fit with the connecting wire.
[0014] Furthermore, along the axial direction of the file clamp pin, the length of the notch is not greater than the length of the wire core exposed by removing the insulation layer at the end of the connecting wire.
[0015] Preferably, along the axial direction of the file clamp pin, the length of the notch is the same as the length of the wire core exposed by removing the insulation layer at the end of the connecting wire.
[0016] The utility model also provides a root canal measuring instrument, which comprises: the file clamp connecting head mentioned above.
[0017] The beneficial effects of the utility model are:
[0018] The file clamp connector provided by the utility model adopts a file clamp pin with a groove portion arranged in the axial direction, which increases the effective contact area between the file clamp pin and the insulating layer of the connecting wire in the clamped state, increases the axial resistance, makes the fit between the file clamp pin and the connecting wire tighter, has better axial pull-off resistance, and has higher connection reliability; at the same time, the setting of the groove portion provides a larger space for plastic deformation when the file clamp pin and the connecting wire are clamped after assembly and fixation, and the file clamp connector can be put into the clamping state with a smaller force, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 A cross-sectional view of a file clamp pin provided in an embodiment of the utility model;
[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0022] Figure 3 It is a plane view of the file clamp connector provided in the embodiment of the utility model in a natural state;
[0023] Figure 4 It is a cross-sectional view of the file clamp connector provided in the embodiment of the utility model in a natural state;
[0024] Figure 5 It is a cross-sectional view of the file clamp connector provided in the embodiment of the utility model in a clamped state.
[0025] Description of Figure Numbers:
[0026] 1. File clip pin; 11. Head; 12. Tail; 13. Mounting hole; 14. Groove; 15. Notch;
[0027] 2. Connecting wire; 21. Wire core; 22. Insulation layer. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] like Figures 1 to 5 As shown, the utility model provides a file clamp pin 1, comprising: a body extending along the axial direction, the body having a head 11 and a tail 12 corresponding to each other in the axial direction, the tail 12 is formed with a mounting hole 13 extending along the axial direction, and at least one groove portion 14 extending along the axial direction and recessed in the radial direction of the mounting hole 13 is formed on the outer side wall of the tail 12, at least part of the groove portion 14 corresponds to the mounting hole 13 in the axial direction.
[0030] Specifically, Figure 1 As shown, the tail portion 12 of the file clamp pin 1 is formed with a mounting hole 13 extending along the axial direction for the connecting wire 2 to be inserted, and the bottom of the mounting hole 13 is tapered so that the end of the connecting wire 2 can be matched with the bottom of the mounting hole 13; Figure 1 and Figure 2As shown, at least one groove portion 14 extending along the axial direction and recessed in the radial direction of the mounting hole 13 is formed on the outer side wall of the tail portion 12 of the file clamp pin 1, and at least part of the groove portion 14 corresponds to the mounting hole 13 in the axial direction, that is, at least part of the groove portion 14 is formed on the needle segment with the mounting hole 13 on the tail portion 12, to prevent the groove portion 14 from being provided on the needle segment without the mounting hole 13 on the tail portion 12, so that the connecting wire 2 and the file clamp pin 1 cannot be fastened together by clamping the part of the groove portion 14; the groove portion 14 can be formed by clamping the tail portion 12 of the file clamp pin 1 to cause it to undergo plastic deformation, or it can be formed by removing material with a milling cutter. In this way, by setting the groove portion 14, a large plastic deformation space is provided for the file clamp pin 1 and the connecting wire 2 to be clamped after assembly, so that the groove portion 14 can be used to press the connecting wire 2 radially inward with a small clamping force, thereby forming an interference fit between the file clamp pin 1 and the connecting wire 2, and realizing a tight connection between the file clamp pin 1 and the connecting wire 2. By designing the axial extension of the groove portion 14, the effective contact area between the file clamp pin and the insulating layer of the connecting wire is increased, and the axial resistance is increased, so that the fit between the file clamp pin and the connecting wire is tighter, the axial pull-off resistance effect is better, and the connection reliability is higher. Among them, along the axial direction of the file clamp pin 1, the groove portion 14 can be a continuous semi-through groove or a discontinuous closed groove. When the groove portion 14 is a semi-through groove, it is easier to process. In this embodiment, the shape of the groove portion 14 can be a common plane shape such as a circle, a square, a triangle, etc., or it can be a spiral shape at a certain angle to the axial direction of the file clamp pin 1. The utility model does not limit this.
[0031] According to one embodiment of the present utility model, Figure 1 As shown, a notch 15 connected to the mounting hole 13 is provided on the outer wall of the body. The notch 15 is provided at the end away from the tail 12. The notch 15 is used to connect the connecting wire 2 inserted into the mounting hole 13 with the file clamp pin 1 in a fixed manner, such as welding. Specifically, in order to facilitate the connection and conduction between the connecting wire 2 and the file clamp pin 1, the end of the connecting wire 2 matched with the bottom of the mounting hole 13 is a bare wire core 21 section after removing the insulating layer 22. The notch 15 is provided to facilitate the welding and fixing of the connecting wire 2 and the file clamp pin 1.
[0032] According to a preferred embodiment of the present invention, Figure 4 and Figure 5As shown, along the axis direction of the file clamp pin 1, the length of the notch 15 is the same as the length of the wire core 21 exposed by removing the end insulation layer 22 of the connecting wire 2, so as to facilitate welding; of course, the length of the notch 15 can also be less than the length of the wire core 21 exposed by removing the end insulation layer 22 of the connecting wire 2, so as to prevent the welding point from contacting the insulation layer 22 during welding, resulting in a weak welding. Furthermore, the length of the notch 15 is slightly larger than the tip of the welding equipment, so as to achieve accurate welding of the connecting wire 2 and the file clamp pin 1.
[0033] According to a preferred embodiment of the present invention, the file clamp pin 1 is made of a metal material with a hardness value not greater than HRC40, such as aluminum, copper, etc., to prevent the file clamp pin 1 from brittle fracture and thus unstable connection, and a softer metal material is more labor-saving when clamping to achieve plastic deformation. Preferably, the file clamp pin 1 is made of metal copper to ensure both hardness and conductivity.
[0034] According to one embodiment of the utility model, the wall thickness of the needle segment with the mounting hole 13 formed on the tail portion 12 is 0.1 mm to 0.4 mm, so that on the basis of ensuring the strength of the tail portion 12, it is convenient to clamp the needle segment with the mounting hole 13 on the tail portion 12 through a clamping tool to form a plurality of circumferentially arranged groove portions 14.
[0035] According to one embodiment of the present utility model, Figures 1 to 5 As shown, on the needle section with the mounting hole 13 formed on the tail portion 12, the side wall thickness of the body corresponding to the groove portion 14 is smaller than the side wall thickness of the body without the groove portion 14, so that the groove portion 14 can be used to press the connecting wire 2 radially inward with a smaller clamping force, thereby realizing a tight connection between the file clamp pin 1 and the connecting wire 2.
[0036] According to one embodiment of the present utility model, Figure 3 As shown, there are multiple groove portions 14, and the multiple groove portions 14 are arranged at intervals along the circumferential direction of the file clamp pin 1, that is, the groove portions 14 can be arranged at intervals along the circumferential direction of the file clamp pin 1 according to actual conditions, such as two, three, four, etc. Preferably, the tail portion 12 of the file clamp pin 1 is formed with four square groove portions 14 evenly distributed along the circumferential direction, and the groove portions 14 are continuous semi-through grooves, which are easy to process and can achieve a firm connection between the file clamp pin 1 and the connecting wire 2.
[0037] like Figures 3 to 5 As shown, the utility model also provides a file clip connector, which includes a connecting wire 2 and the above-mentioned file clip pin 1; the connecting wire 2 has a wire core 21 and an insulating layer 22 covering the outer side of the wire core 21, and the connecting wire 2 can be inserted into the mounting hole 13 and can be connected to the file clip pin 1 in a fixed manner through the notch 15. Specifically, as Figures 3 to 5As shown, the file clamp connector includes a file clamp pin 1 and a connecting wire 2. The connecting wire 2 can be inserted into the mounting hole 13 until the end of the connecting wire 2 contacts the bottom of the mounting hole 13. The tip of the welding equipment extends through the notch 15 to weld the connecting wire 2 to the bottom of the mounting hole 13, thereby fixing the connecting wire 2 and the file clamp pin 1.
[0038] Among them, Figure 5 As shown, after the file clamp pin 1 and the connecting wire 2 are assembled and clamped, the inner wall of the mounting hole 13 corresponding to the groove portion 14 is interference fit with the connecting wire 2. Specifically, as Figure 5 As shown, after the connecting wire 2 is inserted into the mounting hole 13 and fixed with the file clamp pin 1, a clamping tool is used to apply pressure along the radial inner direction to the tail portion 12, so that the file clamp connector enters the clamping state from the natural state, and the side wall of the body corresponding to the groove portion 14 first undergoes plastic deformation radially inward, and after contacting the insulating layer 22 of the connecting wire 2, the insulating layer 22 of the connecting wire 2 is deformed, so that an interference fit is formed between the inner wall of the mounting hole 13 corresponding to the groove portion 14 and the connecting wire 2, and the connecting wire 2 and the file clamp pin 1 are firmly connected. Furthermore, a clamping tool can also be used to apply pressure on the outer wall of the tail portion 12 of the file clamp pin 1 for one circle to form at least one groove ring with a diameter smaller than the outer diameter of the tail portion 12, so as to further enhance the connection firmness between the file clamp pin 1 and the connecting wire 2.
[0039] The file clamp connector provided by the utility model adopts a file clamp pin 1 provided with a groove portion 14 along the axial direction, which increases the effective contact area between the file clamp pin 1 and the insulating layer 22 of the connecting wire 2 in the clamped state, increases the axial resistance, and makes the fit between the file clamp pin 1 and the connecting wire 2 tighter, the axial anti-pull-off effect is better, and the connection reliability is higher; at the same time, the setting of the groove portion 14 provides a larger plastic deformation space for the file clamp pin 1 and the connecting wire 2 to be clamped after they are assembled and fixed, and the file clamp connector can be put into the clamping state by a smaller force, which saves time and effort.
[0040] The utility model also provides a root canal measuring instrument, including the above-mentioned file clamp connector. The root canal measuring instrument can achieve the technical effect of better axial pull-off resistance and higher connection reliability achieved by the file clamp connector implementation mode by setting the above-mentioned file clamp connector. For details, please refer to the specific description of the above-mentioned implementation mode, and this application will not repeat it here.
[0041] The above are only several embodiments of the present invention. Those skilled in the art can make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.
Claims
1. A file clamp pin, characterized in that: include: A main body extending in the axial direction, the main body having corresponding head and tail portions in the axial direction, the tail portion being formed with a mounting hole extending in the axial direction, and at least one groove portion extending in the axial direction and recessed in the radial direction of the mounting hole being formed on the outer side wall of the tail portion, at least part of the groove portion corresponding to the mounting hole in the axial direction.
2. The file clamp pin according to claim 1, characterized in that: A notch portion connected to the mounting hole is provided on the outer side wall of the main body, and the notch portion is arranged at an end away from the tail portion. The notch portion is used to connect the connecting wire inserted into the mounting hole with the file clip pin in a fixed manner.
3. The file clamp pin according to claim 2, characterized in that: The wall thickness of the needle section on the tail portion where the mounting hole is formed is 0.1 mm to 0.4 mm.
4. The file clamp pin according to claim 3, characterized in that: On the needle segment having the mounting hole formed on the tail portion, the side wall thickness of the body corresponding to the groove portion is smaller than the side wall thickness of the body without the groove portion.
5. The file clamp pin according to claim 4, characterized in that: There are four grooves, and the four grooves are evenly distributed along the circumferential direction of the file clamp insertion pin.
6. A file clamp connector, characterized in that: The file clip connector comprises: a connecting wire and a file clip pin as claimed in claim 2; The connecting wire comprises a wire core and an insulating layer covering the outer side of the wire core. The connecting wire can be inserted into the mounting hole and can be connected with the file clamp pin in a fixed manner through the notch.
7. The file clamp connector according to claim 6, characterized in that: After the file clamp pin and the connecting wire are assembled and clamped, the inner wall of the mounting hole corresponding to the groove portion is interference fit with the connecting wire.
8. The file clamp connector according to claim 6, characterized in that: Along the axial direction of the file clamp pin, the length of the notch is not greater than the length of the wire core exposed by removing the insulation layer at the end of the connecting wire.
9. The file clamp connector according to claim 8, characterized in that: Along the axial direction of the file clamp pin, the length of the notch is the same as the length of the wire core exposed by removing the insulation layer at the end of the connecting wire.
10. A root canal measuring instrument, characterized in that: The root canal measuring instrument comprises: the file clamp connecting head as claimed in claim 6.