Cable pipe joint connecting structure and endoscope
By using elastic parts of conductive materials and annular mounting grooves in the endoscope, combined with the multi-point contact design of the oblique coil spring coil, the problem of unreliable connection between the cable tube and the pipe joint is solved, and the electromagnetic compatibility and anti-interference ability are improved , simplifies the assembly process.
Patent Information
- Application Number
- CN202420686226.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-03
AI Technical Summary
The connection between the cable tube and the pipe joint in existing endoscopes is unreliable, resulting in poor electromagnetic compatibility and difficult to ensure conduction performance and anti-interference ability.
The elastic parts made of conductive materials cooperate with the annular mounting groove between the cable tube and the pipe joint. The elastic force is applied through the elastic parts to ensure the firm connection between the cable tube and the pipe joint, and improve the contact with the oblique coil and multi-point contact. Conductive performance.
It realizes reliable conduction connection between cable tubes and pipe joints, improves the electromagnetic compatibility and anti-interference ability of the endoscope, and reduces assembly difficulty and defect rate.
Smart Images
Figure CN222191756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a cable pipe joint connection structure and an endoscope. Background Art
[0002] An electronic endoscope is a medical device that integrates optical, mechanical, and electrical technologies. It is connected to peripheral devices such as light source devices and video processors through connectors, and can observe, diagnose, and treat human cavities and organ cavities.
[0003] In order to ensure the stable and reliable operation of the equipment, the equipment is required to have good safety performance and electromagnetic compatibility performance. As an imaging medical device, the electronic endoscope is equipped with an image sensor and a transmission cable for providing image signals. In order to enhance the ability of the image sensor and the transmission cable to be immune to external electromagnetic interference and the anti-interference ability to static electricity, the image sensor and the transmission cable are required to be in a shielding body with continuous conductivity and good conduction. In the structure of the endoscope, the insertion part and the universal cable tube are both well-conducted shielding bodies. They are transferred through some pipe joints and connected to the operating part and the endoscope connector, so that the entire endoscope basically forms a good shielding body.
[0004] In the related art, the connection between the endoscope, cable tube and pipe joint is usually fixed by glue, and the electrical conductivity between the two is only guaranteed by the close contact of the end faces. However, in actual processing, it is difficult to ensure the flatness of the end faces, and some other factors during the bonding process may cause the end faces to separate, resulting in poor electromagnetic compatibility. Utility Model Content
[0005] In view of this, the utility model provides a cable pipe joint connection structure and an endoscope to solve the problem of poor electromagnetic compatibility caused by unreliable conductive connection between the cable pipe and the pipe joint.
[0006] In the first aspect, the utility model provides a cable pipe joint connection structure, comprising a cable pipe, a pipe joint and an elastic member. The cable pipe and the pipe joint are plug-fitted, and an annular mounting groove is provided between the cable pipe and the pipe joint; the elastic member is made of conductive material, and the elastic member is arranged in the mounting groove, and the elastic member is respectively in conductive contact with the cable pipe and the pipe joint, and applies elastic force to the cable pipe and the pipe joint respectively.
[0007] Beneficial effect: During the process of inserting the cable tube and the pipe joint, the cable tube and the pipe joint will simultaneously conduct and abut against the elastic member, and apply pressure to the elastic member. The elastic member is in a compressed state, and will apply elastic force to the cable tube and the pipe joint, thereby making the cable tube and the pipe joint firmly connected, and making the cable tube and the pipe joint reliably conductively connected, so as to ensure the electromagnetic compatibility between the cable tube and the pipe joint. By setting a mounting groove between the cable tube and the pipe joint, and setting the elastic member in the mounting groove, the mounting groove can limit the elastic member, prevent the elastic member from being displaced due to force during the process of inserting the cable tube and the pipe joint, and ensure the conductive connection between the cable tube and the pipe joint.
[0008] In one embodiment, the cable tube is inserted into the pipe joint, and the elastic member includes a spring ring, which is sleeved outside the cable tube.
[0009] Beneficial effect: The elastic part is set as a spring coil, and the spring coil is sleeved on the outside of the cable pipe. The spring coil and the outer wall of the cable pipe and the inner wall of the pipe joint are in multiple contact points around the entire circumference. On the one hand, the cable pipe and the pipe joint are subjected to elastic force around the entire circumference, ensuring the connection reliability of the cable pipe and the pipe joint around the entire circumference. On the other hand, the contact area between the cable pipe, the spring coil and the pipe joint is large, the current carrying capacity is large, and the conductivity is good.
[0010] In one embodiment, the spring coil is a canted coil spring. After the spring coil is sleeved on the cable tube, the spiral direction of the spring coil is inclined relative to the axial direction of the cable tube, and the inclined direction is opposite to the plugging direction of the cable tube.
[0011] Beneficial effect: by setting the spring coil as a canted coil spring, and after the spring coil and the cable tube are assembled, the spiral direction of the spring coil is inclined with respect to the axial direction of the cable tube, and the inclined direction is opposite to the plug-in direction of the cable tube, that is, the inclined direction is the same as the plug-in direction of the pipe joint, thus ensuring that during the plug-in process of the cable tube and the pipe joint, the spring coil is easily compressed in the inclined direction, so that the spring coil is easy to apply elastic force to the cable tube and the pipe joint.
[0012] In one embodiment, a first angle α is formed between the spiral direction of the spring coil and the axis of the cable tube, and α≤60°.
[0013] Beneficial effect: By controlling the first angle between the spiral direction of the spring coil and the axis of the cable tube, it can ensure that the cable tube and the pipe joint are easy to insert and the spring coil can exert elastic force on the cable tube and the pipe joint, thereby ensuring a stable connection between the cable tube and the pipe joint.
[0014] In one embodiment, the installation groove is provided on the outer circumferential wall of the cable tube; or, the installation groove is provided on the inner circumferential wall of the pipe joint; or, the outer circumferential wall of the cable tube is provided with a first groove, and the inner circumferential wall of the pipe joint is provided with a second groove, and after the cable tube and the pipe joint are inserted, the first groove and the second groove correspond to each other to form the installation groove.
[0015] Beneficial effects: The above three forms can all form installation grooves, with simple structures and easy processing.
[0016] In one embodiment, the cable tube has an annular first step surface, and the pipe joint has an annular second step surface and an annular third step surface, the inner diameter of the third step surface is smaller than the inner diameter of the second step surface, and after the cable tube and the pipe joint are inserted, the front end surface of the cable tube abuts the third step surface, and an installation groove is formed between the first step surface and the second step surface.
[0017] Beneficial effect: By controlling the size of the cable pipe and the pipe joint to form the installation groove, there is no need to process the groove on the surface of the cable pipe or the pipe joint, making the structure simpler and reducing the processing cost.
[0018] In one embodiment, the cable tube includes a first tube segment and a second tube segment connected to each other, the outer diameter of the first tube segment is larger than the outer diameter of the second tube segment, and a first step surface is formed between the first tube segment and the second tube segment; the pipe joint includes a third tube segment and a fourth tube segment connected to each other, the inner diameter of the third tube segment is larger than the inner diameter of the fourth tube segment, and a second step surface is formed between the third tube segment and the fourth tube segment; the first tube segment and the third tube segment are plug-in fit, and the second tube segment and the fourth tube segment are plug-in fit.
[0019] Beneficial effect: By controlling the size of the cable pipe and the pipe joint to form the installation groove, there is no need to process the groove on the surface of the cable pipe or the pipe joint, making the structure simpler and reducing the processing cost.
[0020] In one embodiment, the pipe joint also includes a fifth pipe segment connected to the fourth pipe segment, the inner diameter of the fifth pipe segment is smaller than the inner diameter of the fourth pipe segment, a third step surface is formed between the fourth pipe segment and the fifth pipe segment, and the front end surface of the first pipe segment abuts the third step surface.
[0021] Beneficial effect: The third step surface and the front end surface of the first pipe section abut against each other, thereby achieving assembly and positioning of the cable pipe and the pipe joint.
[0022] In one embodiment, at least two elastic members are provided at intervals along the axial direction of the cable tube.
[0023] Beneficial effect: By setting the number of spring coils to at least two, the connection stability between the spring coils and the cable pipe and the pipe joint can be further improved.
[0024] On the other hand, the utility model also provides an endoscope, comprising the cable pipe joint connection structure of any one of the above embodiments.
[0025] Beneficial effect: Therefore, the cable tube and the pipe joint of the endoscope are fully connected on the circumferential surface through the elastic part, which can help the entire endoscope form a good shielding body, thereby improving the endoscope's anti-electromagnetic interference and anti-static interference capabilities; and, the cable tube joint connection structure of the above embodiment reduces the difficulty of assembly and reduces the defective rate of product assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0027] Figure 1 A cross-sectional view of a first cable pipe joint connection structure according to an embodiment of the utility model;
[0028] Figure 2 for Figure 1 Cross-sectional view of the cable tube;
[0029] Figure 3 for Figure 1 A cross-sectional view of the middle pipe joint;
[0030] Figure 4 It is a structural schematic diagram of a canted coil spring;
[0031] Figure 5 It is a schematic diagram of the deformation structure of the canted coil spring when it is locally compressed;
[0032] Figure 6 A cross-sectional view of a second cable pipe joint connection structure according to an embodiment of the utility model;
[0033] Figure 7 This is a cross-sectional view of a third cable pipe joint connection structure according to an embodiment of the present utility model.
[0034] Description of reference numerals:
[0035] 1. Cable tube; 11. First pipe section; 12. Second pipe section; 101. First step surface; 2. Pipe joint; 21. Third pipe section; 22. Fourth pipe section; 23. Fifth pipe section; 201. Second step surface; 202. Third step surface; 3. Mounting groove; 4. Elastic member. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0037] Combine the following Figures 1 to 7 , describing an embodiment of the utility model.
[0038] According to an embodiment of the utility model, on the one hand, a cable pipe joint connection structure is provided, comprising a cable pipe 1, a pipe joint 2 and an elastic member 4. The cable pipe 1 and the pipe joint 2 are plug-fitted, and an annular mounting groove 3 is provided between the cable pipe 1 and the pipe joint 2; the elastic member 4 is made of a conductive material, and the elastic member 4 is arranged in the mounting groove 3, and the elastic member 4 is in conductive contact with the cable pipe 1 and the pipe joint 2 at the same time, and the elastic member 4 applies elastic force to the cable pipe 1 and the pipe joint 2 respectively.
[0039] During the insertion process of the cable tube 1 and the pipe joint 2, the cable tube 1 and the pipe joint 2 will simultaneously be in conductive contact with the elastic member 4 and pressure will be applied to the elastic member 4. The elastic member 4 is in a compressed state and will apply elastic force to the cable tube 1 and the pipe joint 2, thereby making the cable tube 1 and the pipe joint 2 firmly connected, achieving reliable conduction and connection between the cable tube 1 and the pipe joint 2, thereby ensuring the electromagnetic compatibility between the cable tube 1 and the pipe joint 2.
[0040] The elastic member 4 is made of conductive material because, if the elastic member 4 is not conductive, the cable tube 1 and the pipe joint 2 are conductive only by end face contact or circumferential surface contact. Since the contact surface between the cable tube 1 and the pipe joint 2 may be virtual due to processing errors and other factors, the reliability is poor, which affects the electrical conductivity and electromagnetic compatibility of the cable tube 1 and the pipe joint 2. At the same time, the elastic member 4 made of non-conductive material will reduce the conductive contact area between the cable tube 1 and the pipe joint 2, thereby affecting the conductivity and electromagnetic compatibility between the cable tube 1 and the pipe joint 2.
[0041] By setting the installation groove 3 between the cable tube 1 and the pipe joint 2, and setting the elastic member 4 in the installation groove 3, the installation groove 3 can limit the elastic member 4, ensure the stability of the shape of the elastic member 4 during installation, prevent the elastic member 4 from moving in a large range due to force during the insertion process of the cable tube 1 and the pipe joint 2, and ensure the conductive connection between the cable tube 1 and the pipe joint 2.
[0042] In one embodiment, the cable tube 1 is inserted into the pipe joint 2 , and the elastic member 4 includes a spring ring, which is sleeved outside the cable tube 1 .
[0043] The elastic member 4 is set as a spring coil, and the spring coil is sleeved on the outside of the cable tube 1. The spring coil and the outer wall of the cable tube 1 and the inner wall of the pipe joint 2 form multi-point contact throughout the circumference. On the one hand, the cable tube 1 and the pipe joint 2 can be subjected to elastic force throughout the circumference, ensuring the connection reliability of the cable tube 1 and the pipe joint 2 throughout the circumference. On the other hand, the contact area between the cable tube 1, the spring coil and the pipe joint 2 is large, the current carrying capacity is large, and the conductive performance is good.
[0044] In one embodiment, the spring coil is a canted coil spring. After the spring coil is sleeved on the cable tube 1 , the spiral direction of the spring coil is tilted relative to the axial direction of the cable tube 1 , and the tilting direction is opposite to the plugging direction of the cable tube 1 .
[0045] Specifically, Figure 4 As shown, the canted coil spring is a helical structure and is a circular spring with windings.
[0046] like Figure 5 As shown, the helical direction of the spring coil is inclined with respect to the axial direction of the cable tube 1, and the helical direction of the spring coil and the axis of the cable tube 1 form a first angle α. Since the helical direction of the helical coil spring is inclined, when subjected to pressure, the pressure is as follows: Figure 5 As shown by the loading force F, each winding of the canted coil spring will independently produce elastic deformation, and the elastic deformation is as follows Figure 5 As shown in L. No matter which part of the winding is deformed, the entire spring will react, thereby achieving uniform load and full contact at each contact point.
[0047] Specifically, the inclination direction of the canted coil spring is opposite to the plug-in direction of the cable tube 1, that is, the inclination direction is the same as the plug-in direction of the pipe joint 2. This ensures that during the plug-in process of the cable tube 1 and the pipe joint 2, the spring coil is easily compressed in the inclination direction, so that the spring coil is easy to apply elastic force to the cable tube 1 and the pipe joint 2.
[0048] In one embodiment, Figure 5 As shown, the first angle α between the spiral direction of the spring coil and the axis of the cable tube 1 satisfies α≤60°.
[0049] By controlling the first angle between the spiral direction of the spring coil and the axis of the cable tube 1, it can be ensured that the cable tube 1 and the pipe joint 2 are easy to insert and assembled, and that the spring coil can exert elastic force on the cable tube 1 and the pipe joint 2, thereby ensuring a stable connection between the cable tube 1 and the pipe joint 2.
[0050] Regarding the setting form of the installation groove 3, the following situations are included:
[0051] In the first embodiment, if Figure 6 As shown, the mounting groove 3 is arranged on the outer peripheral wall of the cable tube 1 .
[0052] In the second embodiment, if Figure 7 As shown, the mounting groove 3 is arranged on the inner peripheral wall of the pipe joint 2 .
[0053] In the third embodiment, the outer wall of the cable tube 1 is provided with a first groove, and the inner wall of the pipe joint 2 is provided with a second groove. It can be understood that after the cable tube 1 and the pipe joint 2 are inserted, the first groove and the second groove correspond to each other to form the installation groove 3.
[0054] In the fourth embodiment, if Figure 1 As shown, the cable tube 1 has an annular first step surface 101, and the pipe joint 2 has an annular second step surface 201 and an annular third step surface 202. The inner diameter of the third step surface 202 is smaller than the inner diameter of the second step surface 201. After the cable tube 1 and the pipe joint 2 are inserted, the front end surface of the cable tube 1 abuts against the third step surface 202, and a mounting groove 3 is formed between the first step surface 101 and the second step surface 201.
[0055] The above four forms can all form the installation groove 3, have a simple structure, and are easy to process. Since the spring coil is elastic, the elastic member 4 can be installed in the installation groove 3 through elastic deformation.
[0056] Specifically, for the fourth embodiment described above, Figure 1 As shown, the cable tube 1 includes a first tube segment 11 and a second tube segment 12 connected to each other, the outer diameter of the first tube segment 11 is greater than the outer diameter of the second tube segment 12, and a first step surface 101 is formed between the first tube segment 11 and the second tube segment 12; the pipe joint 2 includes a third tube segment 21 and a fourth tube segment 22 connected to each other, the inner diameter of the third tube segment 21 is greater than the inner diameter of the fourth tube segment 22, and a second step surface 201 is formed between the third tube segment 21 and the fourth tube segment 22; the first tube segment 11 and the third tube segment 21 are plug-fitted, and the second tube segment 12 and the fourth tube segment 22 are plug-fitted.
[0057] In this embodiment, the gap between the first step surface 101 and the second step surface 201 constitutes the installation groove 3, and the spring ring is sleeved outside the cable tube 1. By controlling the size of the cable tube 1 and the pipe joint 2 to form the installation groove 3, there is no need to process grooves on the surface of the cable tube 1 or the pipe joint 2, making the structure simpler and reducing the processing cost.
[0058] In one embodiment, the pipe joint 2 also includes a fifth pipe segment 23 connected to the fourth pipe segment 22, the inner diameter of the fifth pipe segment 23 is smaller than the inner diameter of the fourth pipe segment 22, a third step surface 202 is formed between the fourth pipe segment 22 and the fifth pipe segment 23, and the front end surface of the first pipe segment 11 abuts against the third step surface 202.
[0059] The third step surface 202 and the front end surface of the first pipe section 11 are in contact with each other to realize the assembly and positioning of the cable tube 1 and the pipe joint 2. When the front end surface of the first pipe section 11 and the third step surface 202 are in contact, it means that the cable tube 1 and the pipe joint 2 are in place.
[0060] In one embodiment, at least two elastic members 4 are provided at intervals along the axial direction of the cable tube 1 .
[0061] By setting the number of spring coils to at least two, the connection stability between the cable tube 1 and the pipe joint 2 by the spring coils can be further improved.
[0062] Further, in one embodiment, the number of mounting grooves 3 is set corresponding to the number of elastic members 4. In this way, one elastic member 4 can be set in a separate mounting groove 3, and the elastic member 4 is limited to prevent adjacent elastic members 4 from interfering with each other when they are in one mounting groove 3. Of course, when only one mounting groove 3 is set, other assembly means can also be used to prevent adjacent elastic members 4 from interfering with each other during assembly, for example, the position of the elastic member 4 can be fixed by gluing.
[0063] According to an embodiment of the present utility model, on the other hand, an endoscope is provided, comprising the cable pipe joint connection structure of any one of the above embodiments.
[0064] The cable tube 1 and the pipe joint 2 of the endoscope are fully connected on the circumferential surface through the elastic member 4, which can help the entire endoscope form a good shielding body, thereby improving the endoscope's anti-electromagnetic interference and anti-static interference capabilities; and the cable tube joint connection structure of the above embodiment reduces the difficulty of assembly and reduces the defective rate of product assembly.
[0065] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.
Claims
1. A cable pipe joint connection structure, characterized in that: include: Cable duct (1); Pipe joint (2); the cable pipe (1) and the pipe joint (2) are plug-fitted together, and an annular mounting groove (3) is provided between the cable pipe (1) and the pipe joint (2); An elastic member (4), wherein the elastic member (4) is made of a conductive material, and the elastic member (4) is arranged in the mounting groove (3). The elastic member (4) is in conductive contact with the cable tube (1) and the pipe joint (2), respectively, and applies elastic force to the cable tube (1) and the pipe joint (2), respectively.
2. The cable pipe joint connection structure according to claim 1, characterized in that: The cable tube (1) is inserted into the tube joint (2), and the elastic member (4) comprises a spring ring, which is sleeved outside the cable tube (1).
3. The cable pipe joint connection structure according to claim 2, characterized in that: The spring coil is a canted coil spring. After the spring coil is sleeved on the cable tube (1), the spiral direction of the spring coil is inclined relative to the axial direction of the cable tube (1), and the inclined direction is opposite to the plugging direction of the cable tube (1).
4. The cable pipe joint connection structure according to claim 3, characterized in that: A first angle α is formed between the spiral direction of the spring coil and the axis of the cable tube (1), and α≤60°.
5. The cable pipe joint connection structure according to any one of claims 1 to 4, characterized in that: The installation groove (3) is arranged on the outer peripheral wall of the cable tube (1); Alternatively, the mounting groove (3) is provided on the inner peripheral wall of the pipe joint (2); Alternatively, the outer circumferential wall of the cable tube (1) is provided with a first groove, and the inner circumferential wall of the pipe joint (2) is provided with a second groove, and after the cable tube (1) and the pipe joint (2) are inserted, the first groove and the second groove correspond to each other to form the installation groove (3).
6. The cable pipe joint connection structure according to any one of claims 1 to 4, characterized in that: The cable tube (1) has an annular first step surface (101), and the pipe joint (2) has an annular second step surface (201) and an annular third step surface (202); the inner diameter of the third step surface (202) is smaller than the inner diameter of the second step surface (201); after the cable tube (1) and the pipe joint (2) are inserted, the front end surface of the cable tube (1) abuts against the third step surface (202), and the installation groove (3) is formed between the first step surface (101) and the second step surface (201).
7. The cable pipe joint connection structure according to claim 6, characterized in that: The cable tube (1) comprises a first tube section (11) and a second tube section (12) connected to each other, the outer diameter of the first tube section (11) is greater than the outer diameter of the second tube section (12), and the first step surface (101) is formed between the first tube section (11) and the second tube section (12); The pipe joint (2) comprises a third pipe section (21) and a fourth pipe section (22) which are connected to each other, the inner diameter of the third pipe section (21) is larger than the inner diameter of the fourth pipe section (22), and the second step surface (201) is formed between the third pipe section (21) and the fourth pipe section (22); The first pipe section (11) and the third pipe section (21) are plug-fitted together, and the second pipe section (12) and the fourth pipe section (22) are plug-fitted together.
8. The cable pipe joint connection structure according to claim 7, characterized in that: The pipe joint (2) further comprises a fifth pipe section (23) connected to the fourth pipe section (22); the inner diameter of the fifth pipe section (23) is smaller than the inner diameter of the fourth pipe section (22); a third step surface (202) is formed between the fourth pipe section (22) and the fifth pipe section (23); and the front end surface of the first pipe section (11) abuts against the third step surface (202).
9. The cable pipe joint connection structure according to any one of claims 1 to 4, characterized in that: At least two elastic members (4) are arranged at intervals along the axial direction of the cable tube (1).
10. An endoscope, characterized in that: The invention comprises the cable pipe joint connection structure according to any one of claims 1 to 9.