Contact elastic sheet structure, contact sleeve and wire end connector
By designing the contact shrapnel structure of multiple projections and transition parts, the resistance problem during the assembly of small-size wire-end connectors is solved, and the mechanical properties of the contact shrapnel are improved through the design of the connection ring, achieving higher quality assembly effect.
Patent Information
- Application Number
- CN202323397835.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2033-12-12
AI Technical Summary
Small-size wire-end connectors are prone to resistance when the contact sleeve is inserted into the docking sleeve during assembly, and the mechanical properties of the contact shrapnel are reduced and easily damaged.
A contact shrapnel structure is designed, with at least two protrusions, the height gradually increases in the direction of the interlocking part, and the resistance of the protrusions snap into the docking sleeve is reduced through the transition part. At the same time, the connecting ring allows multiple contact shrapnel to be subjected to force evenly to avoid damage.
Through the design of multiple projections and transitions, the resistance of the contact sleeve inserted into the docking sleeve is reduced, the convenience of assembly is improved, and the mechanical properties of the contact shrapnel are improved through the uniform stress design, and the possibility of damage is reduced.
Smart Images
Figure CN222896848U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of connecting devices, in particular to a contact spring structure, a contact sleeve and a wire end connector. Background Art
[0002] A wire end connector is a device used to connect wires, usually made of metal or plastic, and is commonly used in household electrical appliances, electronic equipment, automobiles, and ships. The function of a wire end connector is to insert the exposed part of the wire into the connector and lock the wire by pressure or thread so that current can flow through the wire end connector. Wire end connectors can be used to connect wires of the same or different types, and to connect wires to electrical equipment.
[0003] Mini-fakra cable end connector is a specific type of cable end connector, which is usually used in automotive wireless communication systems. Compared with ordinary cable end connectors, mini-fakra cable end connectors usually have smaller size and higher frequency performance to meet the space and performance requirements of automotive communication systems.
[0004] The wire end connector includes a contact sleeve with a contact spring and a protrusion, and a docking sleeve for the contact spring to be inserted. When connecting the wires, the contact spring is inserted into the docking sleeve, and the protrusion abuts against the inner wall of the docking sleeve, so that the contact sleeve is connected to the docking sleeve. However, due to the small specifications of some wire end connectors, such as the mini-fakra wire end connector, and the protrusion enters the docking sleeve, it will abut against the side of the docking sleeve facing the contact sleeve, blocking the contact sleeve from being inserted into the docking sleeve, making it inconvenient to assemble the contact sleeve and the docking sleeve; and due to the small specifications, the mechanical properties of the contact spring are also reduced, and the contact spring is easily damaged during the assembly process. Utility Model Content
[0005] In order to reduce the resistance during the process of inserting the contact sleeve into the docking sleeve and facilitate the assembly of a small-sized wire end connector, the utility model provides a contact spring structure, a contact sleeve and a wire end connector.
[0006] The utility model provides a contact spring structure, which adopts the following technical solution:
[0007] A contact spring structure comprises a cylindrical plug-in portion and a contact spring, wherein the contact spring is arranged at one end of the plug-in portion, and at least two protrusions are provided on the contact spring, and the height of the protrusions gradually increases along the direction approaching the plug-in portion, and a transition portion is provided between the protrusions on the same contact spring.
[0008] In a specific possible implementation manner, the contact spring sheets are provided with at least two pieces, and the contact spring sheets are evenly spaced and arranged at one end of the plug-in portion.
[0009] In a specific possible implementation manner, a connecting ring is provided at one end of the contact spring piece away from the plug-in portion, a clearance groove is provided on the connecting ring, and the clearance groove is arranged between adjacent contact spring pieces.
[0010] In a specific possible implementation manner, the protrusions of adjacent contact springs are arranged at intervals along the axial direction of the plug-in portion.
[0011] In a specific possible implementation manner, the protrusion is obtained by the contact spring protruding along the direction in which the inner diameter of the plug-in portion increases.
[0012] In a specific possible implementation manner, the protrusions on adjacent contact springs are arranged with an axial distance offset along the axial direction of the plug-in portion.
[0013] The utility model also provides a contact sleeve, which adopts the following technical solution:
[0014] A contact sleeve comprises the above-mentioned contact spring structure and a main body, wherein the contact spring structure is arranged at one end of the main body.
[0015] The utility model also provides a line end connector, which adopts the following technical solution:
[0016] A wire end connector comprises the above-mentioned contact sleeve and a docking sleeve used for connecting with the contact sleeve.
[0017] In summary, the present invention includes at least one of the following beneficial technical effects:
[0018] 1. By setting the original one protrusion into at least two forms, when the contact spring is inserted into the docking sleeve, the protrusion with a smaller height is inserted into the docking sleeve first, and the process of the contact sleeve entering the docking sleeve is guided and centered by the protrusion with a smaller height and the transition part, so that the contact sleeve is coaxially arranged in the docking sleeve. At the same time, the transition part provides a smooth curved surface for the process of the protrusion with a larger height being inserted into the docking sleeve, reducing the resistance when the protrusion is inserted into the docking sleeve. And relying on the protrusion with a smaller height, the slope of the transition part is reduced, making the process of the protrusion with a larger height being inserted into the docking sleeve smoother, reducing the resistance when the protrusion is inserted into the docking sleeve.
[0019] 2. The connecting ring enables multiple contact springs to undergo elastic deformation with the same amplitude as much as possible under the action of the protrusion, so that when the contact springs are inserted into the docking sleeve, the multiple springs are evenly stressed, and it is less likely that the contact springs will be damaged, thereby improving the connection quality between the contact sleeve and the docking sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1It is a schematic diagram of the structure of the contact sleeve.
[0021] Figure 2 It is a schematic diagram showing the positional relationship between the first protrusion and the second protrusion.
[0022] Figure 3 It is a schematic diagram showing the insertion of the contact sleeve into the docking sleeve.
[0023] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A in the middle.
[0024] Figure 5 It is a schematic diagram showing the positional relationship between adjacent second protrusions.
[0025] Explanation of the accompanying drawings: 1. plug-in part; 2. contact spring; 21. first contact spring; 22. second contact spring; 3. first protrusion; 4. second protrusion; 5. connecting ring; 6. clearance groove; 7. main body; 8. docking sleeve; 9. axial distance. DETAILED DESCRIPTION
[0026] The following is combined with Figure 1-5 The utility model is described in further detail.
[0027] Reference Figure 1 and Figure 2 The contact spring structure includes a cylindrical plug-in portion 1 and multiple contact springs 2, the multiple contact springs 2 are evenly fixed at one end of the plug-in portion 1, and the multiple contact springs 2 are evenly spaced and distributed at one end of the plug-in portion 1. It can be understood that the plug-in portion 1 can also be any hollow structure such as a square cylinder or a conical cylinder, which can allow the wire to pass through for subsequent connection.
[0028] Reference Figure 1 and Figure 2, the end of the contact spring 2 away from the plug-in part 1 is provided with two protrusions. It can be understood that the number of protrusions can also be any integer greater than two, as long as it can meet the design requirements, and it is not limited here. For the convenience of explanation, the first protrusion 3 and the second protrusion 4 are used to distinguish. The first protrusion 3 and the second protrusion 4 are arranged in turn along the axial direction of the plug-in part 1. The height of the first protrusion 3 is less than the height of the second protrusion 4. The sum of the height of the first protrusion 3 and the outer diameter of the plug-in part 1 is less than the inner diameter of the docking sleeve 8 of the wire end connector, and the sum of the height of the second protrusion 4 and the outer diameter of the plug-in part 1 is greater than the inner diameter of the docking sleeve 8 of the wire end connector. It should be noted that the height of the first protrusion 3 refers to the distance between the farthest end of the first protrusion 3 away from the contact spring 2 and the contact spring 2, and the second protrusion 4 is the same. The first protrusion 3 and the second protrusion 4 are both obtained by bending and protruding the contact spring 2 in the direction of increasing the diameter of the plug-in part 1. In some other embodiments, they can also be obtained by protruding by increasing the thickness of the contact spring 2, which is not limited here.
[0029] A transition portion is provided between the first protrusion 3 and the second protrusion 4 , so that a smooth transition curved surface is formed between the first protrusion 3 and the second protrusion 4 .
[0030] Reference Figure 3 and Figure 4 When the contact spring 2 is inserted into the docking sleeve 8, the first protrusion 3 is first inserted into the docking sleeve 8. The first protrusion 3 guides the insertion process of the contact spring 2 and aligns the plug-in portion 1, so that the plug-in portion 1 and the docking sleeve 8 are in a coaxial state. As the contact spring 2 goes deeper into the docking sleeve 8, the gap between the transition portion and the inner wall of the docking sleeve 8 gradually decreases until the surface of the transition portion fits the inner wall of the docking sleeve 8. By further applying thrust, the docking sleeve 8 squeezes the surface of the transition portion and slides to the top of the second protrusion 4 through the surface of the transition portion, so that the second protrusion 4 enters the docking sleeve 8. The smooth transition surface of the transition portion reduces the resistance of the second protrusion 4 to insert into the docking sleeve 8. The further setting of the first protrusion 3 can guide the insertion of the contact spring 2 while reducing the height difference between the two ends of the transition portion, so that the slope of the surface of the transition portion is reduced, and the resistance of the second protrusion 4 when entering the docking sleeve 8 is further reduced, which is convenient for the assembly of small-sized wire end connectors.
[0031] Reference Figure 1 and Figure 2A connecting ring 5 is fixed to the end of the contact spring piece 2 away from the plug-in part 1. The connecting ring 5 is fixedly connected to each contact spring piece 2. A clearance groove 6 is provided on the connecting ring 5. The clearance groove 6 is arranged between adjacent contact spring pieces 2, so that the connecting ring 5 forms an open loop. When the second protrusions 4 are brought closer to each other under the action of thrust, the diameter of the connecting ring 5 is reduced, and the width of the clearance groove 6 is reduced, driving the multiple contact spring pieces 2 to evenly approach the axis of the plug-in part 1, so that each contact spring piece 2 is subjected to a more uniform thrust, and the situation in which the contact spring piece 2 is damaged due to uneven thrust distribution during the plug-in process is avoided as much as possible, thereby improving the assembly quality of small-sized line end connectors.
[0032] Reference Figure 5 In some other embodiments, the second protrusion 4 can also be offset by an axial distance 9 along the axis of the plug-in portion 1 toward the plug-in portion 1, so that the spacing between adjacent second protrusions 4 and the docking sleeve 8 is different. By dividing the contact springs 2 into at least two groups, the positions of the second protrusions 4 on each group of contact springs 2 are offset, and the second protrusions 4 of the same group of contact springs 2 are on the same straight line in the circumferential direction. For the convenience of explanation, two groups of contact springs 2 are used as examples below, and for the convenience of distinction, the first contact spring 21 and the second contact spring 22 are used to distinguish.
[0033] Reference Figure 5 , the distance between the second protrusion 4 on the first contact spring 21 and the docking sleeve 8 is smaller than the distance between the second protrusion 4 on the second contact spring 22 and the docking sleeve 8. During the plug-in process, the second protrusion 4 on the first contact spring 21 enters the docking sleeve 8 first. Since the number of second protrusions 4 that abut against the docking sleeve 8 is reduced at the same time, the resistance encountered during the plug-in process is further reduced. Under the action of the connecting ring 5, the first contact spring 21 and the second contact spring 22 are synchronously moved closer to each other, so that the second protrusion 4 on the second contact spring 22 is moved closer to each other, reducing the resistance of the second protrusion 4 on the second contact spring 22 entering the docking sleeve 8, which is convenient for the assembly of small-sized wire end connectors.
[0034] This embodiment further discloses a contact sleeve, comprising the above-mentioned contact spring sheet structure and a main body 7 , wherein the main body 7 is fixed to an end of the plug-in portion 1 away from the contact spring sheet 2 .
[0035] This embodiment further discloses a wire end connector, comprising the above-mentioned contact sleeve and a docking sleeve 8 for plugging and mating with the contact sleeve.
[0036] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A contact spring structure, comprising a cylindrical plug-in portion and a contact spring, wherein the contact spring is arranged at one end of the plug-in portion. Features: At least two protrusions are arranged on the contact spring sheet, and the height of the protrusions gradually increases in a direction approaching the plug-in portion. A transition portion is arranged between the protrusions on the same contact spring sheet.
2. The contact spring structure according to claim 1, Features: The contact spring sheets are provided with at least two pieces, and the contact spring sheets are evenly spaced and arranged at one end of the plug-in portion.
3. The contact spring structure according to claim 2, Features: A connecting ring is provided at one end of the contact spring piece away from the plug-in portion. A clearance groove is provided on the connecting ring. The clearance groove is arranged between adjacent contact spring pieces.
4. The contact spring structure according to claim 2, Features: The protrusions of adjacent contact springs are arranged at intervals along the axial direction of the plug-in portion.
5. The contact spring structure according to claim 1, Features: The protrusion is obtained by the contact spring protruding along the direction in which the inner diameter of the plug-in portion increases.
6. The contact spring structure according to claim 1, Features: The protrusions on adjacent contact spring sheets are arranged with an axial distance offset along the axis direction of the plug-in portion.
7. A contact sleeve, Features: It comprises the contact spring structure according to any one of claims 1 to 5, and a main body, wherein the contact spring structure is arranged at one end of the main body.
8. A line end connector, Features: The invention comprises the contact sleeve according to claim 7, and a docking sleeve used for connecting with the contact sleeve.