Automated rivetable compressible connector

Abstract

The present application relates to an automatic riveting compressible connector, comprising a needle shaft, a needle tube and a spring, the spring is arranged in the needle tube, the needle shaft comprises a sliding part and a contact part, the sliding part is arranged in the needle tube and contacts with the spring, the contact part is located outside the needle tube, the contact part is provided with a groove towards the inner end face of the needle tube, the groove has a slope surface inclined to the center, the opening of the needle tube is provided with a riveting part, when the needle shaft is pressed into the needle tube, the groove of the needle shaft extrudes the riveting part of the needle tube, the riveting part forms a necking part with a smaller aperture through inelastic deformation, and the sliding part of the needle shaft is limited in the needle tube through the necking part. The present application can make the opening of the needle tube necked during the process of pressing the needle shaft into the needle tube, so that the needle shaft can be slidably installed on the needle tube and not easily separated from the needle tube; the needle shaft has a jig function, that is, it can be used as a product and a jig, which greatly simplifies the assembly process of the needle shaft and the needle tube; and the groove increases the stroke of the needle shaft under the condition of the same total length.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and in particular to an automatically riveting compressible connector. Background Technology

[0002] Spring pins, as fundamental electrical connection components, possess characteristics such as structural stability and excellent electrical performance. To be used in different design environments, spring pins of different structural types are required. Some spring pins have a pin shaft outer diameter larger than the needle tube bore inner diameter / needle tube outer diameter. Such spring pins cannot be fixed by conventional jigs to rivet the needle tube end, requiring an additional riveting (spinning) process for production. For example, Chinese invention application number 2021212018270 discloses a rotary riveting spring pin structure, including a pin shaft, a spring, and a needle tube. The spring and pin shaft are sequentially inserted into the cavity of the needle tube. The needle tube has a limiting part formed by spin riveting on its inner wall. The pin shaft, located on the outer wall of the needle tube cavity, has a circumferential groove, with the limiting part located within the groove. A through hole is provided inside the pin shaft, communicating with the needle tube cavity. This invention employs a spin riveting method to stably insert the pin shaft into the needle tube. In actual production, the riveting process is too inefficient, resulting in high costs and low production capacity. Therefore, it is necessary to improve the structure of this type of spring pin. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an automatically riveting compressible connector. The needle shaft functions as a fixture, serving as both a product and a fixture. During the assembly of the needle shaft and needle tube, the needle shaft presses and rivets the needle tube to close the end, thus completing the assembly.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatically riveting compressible connector, comprising a needle shaft, a needle tube, and a spring. The spring is disposed inside the needle tube. The needle shaft includes a sliding portion and a contact portion. The sliding portion is slidably disposed inside the needle tube and contacts the spring. The contact portion is located outside the needle tube. The contact portion has a groove on its inner end face facing the needle tube. The groove has a slope inclined towards the axis. A riveting portion is provided at the opening of the needle tube. When the needle shaft is pressed into the needle tube, the groove of the needle shaft squeezes the riveting portion of the needle tube. The riveting portion forms a narrowed opening through non-elastic deformation. The sliding portion of the needle shaft is confined inside the needle tube by the narrowed opening.

[0005] In the above technical solution, the sliding part has a sliding end that matches the needle tube shaft hole and a connecting rod. The connecting rod is disposed between the sliding end and the contact part, and the end face of the sliding end is provided with an inclined surface that is connected to the spring.

[0006] In the above technical solution, a limiting step is provided between the sliding end and the connecting rod, and the limiting step abuts against the closing part under the action of the spring.

[0007] In the above technical solution, the thickness of the crimping part gradually decreases from the needle tube body towards the opening direction.

[0008] In the above technical solution, the minimum outer diameter of the riveting part is between the maximum inner diameter and the minimum inner diameter of the groove slope.

[0009] In the above technical solution, the outer diameter of the contact portion is larger than the outer diameter of the needle tube.

[0010] In the above technical solution, the end face of the contact portion is a contact plane.

[0011] In the above technical solution, the end face of the contact portion is a spherical arc surface.

[0012] In the above technical solution, an insulating ball is provided between the inclined surface and the spring.

[0013] In the above technical solution, the needle is a needle with one end open or a needle with both ends open.

[0014] The beneficial effects of this invention are that it has a reasonable structure, novel design, and strong practicality. By using the groove to press the needle shaft into the needle tube during the insertion process, the opening of the needle tube is closed, allowing the needle shaft to be slidably mounted on the needle tube and not easily detached from it. The needle shaft also functions as a fixture, serving as both a product and a fixture, greatly simplifying the assembly process of the needle shaft and needle tube and solving the disadvantages of high cost and low production capacity of the riveting process. With the same total length, the groove increases the stroke of the needle shaft. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of Embodiment 1 of the present invention (in the unriveted state).

[0016] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention (after riveting).

[0017] Figure 3 This is a schematic diagram of the structural evolution from unriveted to riveted according to Embodiment 1 of the present invention.

[0018] Figure 4 This is a schematic diagram of the planar structure of Embodiment 2 of the present invention.

[0019] Figure 5 This is a cross-sectional structural diagram of Embodiment 3 of the present invention.

[0020] Figure 6 This is a cross-sectional structural diagram of Embodiment 4 of the present invention.

[0021] In the diagram: 1. Needle tube; 11. Shaft hole; 12. Riveting part; 13. Closing part; 2. Needle shaft; 21. Contact part; 22. Connecting rod; 23. Sliding end; 24. Contact plane; 25. Groove; 26. Slope; 27. Limiting step; 28. Inclined surface; 3. Spring; 4. Spherical arc surface; 5. Insulating ball; 6. Second needle shaft; 61. Sliding end; 62. Contact end. Detailed Implementation

[0022] Specific embodiments of the present invention are described with reference to the accompanying drawings.

[0023] Example 1,

[0024] This embodiment is the preferred embodiment, such as... Figure 1-3 As shown, the self-riveting compressible connector includes a needle shaft 2, a needle tube 1, and a spring 3. The spring 3 is disposed inside the needle tube 1. The needle shaft 2 includes a sliding part and a contact part 21. The sliding part is slidably disposed inside the needle tube 1 and contacts the spring 3. The contact part 21 is located outside the needle tube 1. The contact part 21 is provided with a groove 25 facing the inner end face of the needle tube 1. The groove 25 has a slope 26 inclined towards the axis. A pressing part 12 is provided at the opening of the needle tube 1. When the needle shaft 2 is pressed into the needle tube 1, the groove 25 of the needle shaft 2 squeezes the pressing part 12 of the needle tube 1. The pressing part 12 forms a narrowed opening 13 through non-elastic deformation. The sliding part of the needle shaft 2 is restricted inside the needle tube 1 by the narrowed opening 13.

[0025] Spring 3 is a stainless steel spring 3. Needle tube 1 and needle shaft 2 are both hardware parts, preferably copper alloy parts. The hardness of needle shaft 2 needs to be higher than that of needle tube 1 to ensure that during riveting, the deformation of the riveting part 12 of needle tube 1 is greater than the deformation of needle shaft 2, or that needle shaft 2 will not deform.

[0026] Slope 26 is a partially conical surface, but other shapes can also be used, such as hexagonal pyramidal surfaces, octagonal pyramidal surfaces, etc.

[0027] The sliding part has a sliding end 23 that matches the shaft hole 11 of the needle tube 1 and a connecting rod 22. The connecting rod 22 is disposed between the sliding end 23 and the contact part 21. The end face of the sliding end 23 is provided with an inclined surface 28 that is connected to the spring 3. The spring 3 acts on the inclined surface 28 to ensure that the needle shaft 2 is slightly tilted, so that the sliding end 23 of the needle shaft 2 is always in communication with the inner wall of the shaft hole 11 of the needle tube 1.

[0028] A limiting step 27 is provided between the sliding end 23 and the connecting rod 22. Under the action of the spring 3, the limiting step 27 abuts against the closing part 13 of the needle shaft 2.

[0029] From the main body of the needle tube 1 towards the opening, the thickness of the riveting portion 12 gradually decreases. The outer diameter of the contact portion 21 is larger than the outer diameter of the needle tube 1. During the riveting process, the thinner portion is squeezed by the groove 25 slope 26 towards the shaft hole 11 and deformed to close the opening.

[0030] The minimum outer diameter of the press-fit part 12 is between the maximum and minimum inner diameters of the groove 25 slope 26. The thickness between the groove 25 and the cylindrical surface of the contact part 21 is greater than the thickness of the needle tube 1.

[0031] The needle tube 1 is an open-ended needle tube. The end face of the contact portion 21 is a contact plane 24, which has a large contact area. This allows another connector that works with this connector to have a larger contact range, thus improving the stability of the contact conduction.

[0032] The groove 25 has a slope 26 that slopes towards the axis. When the needle shaft 2 is pressed into the needle tube 1, the opening of the needle tube 1 is closed by the groove 25, which restricts the needle shaft 2 inside the needle tube 1 and prevents it from coming off. The product itself is both a product and a fixture. With the same total length, the stroke of the needle shaft 2 can be increased.

[0033] Example 2,

[0034] like Figure 4 As shown, the self-riveting compressible connector includes a needle shaft 2, a needle tube 1, and a spring 3. The spring 3 is disposed inside the needle tube 1. The needle shaft 2 includes a sliding part and a contact part 21. The sliding part is slidably disposed inside the needle tube 1 and contacts the spring 3. The contact part 21 is located outside the needle tube 1. The contact part 21 is provided with a groove 25 facing the inner end face of the needle tube 1. The groove 25 has a slope 26 inclined towards the axis. A pressing part 12 is provided at the opening of the needle tube 1. When the needle shaft 2 is pressed into the needle tube 1, the groove 25 of the needle shaft 2 squeezes the pressing part 12 of the needle tube 1. The pressing part 12 forms a narrowed opening 13 through non-elastic deformation. The sliding part of the needle shaft 2 is restricted inside the needle tube 1 by the narrowed opening 13.

[0035] The sliding part has a sliding end 23 that matches the shaft hole 11 of the needle tube 1 and a connecting rod 22. The connecting rod 22 is disposed between the sliding end 23 and the contact part 21. The end face of the sliding end 23 is provided with an inclined surface 28 that is connected to the spring 3.

[0036] A limiting step 27 is provided between the sliding end 23 and the connecting rod 22. Under the action of the spring 3, the limiting step 27 abuts against the closing part 13 of the needle shaft 2.

[0037] The thickness of the crimped portion 12 gradually decreases from the main body of the needle tube 1 towards the opening. The outer diameter of the contact portion 21 is larger than the outer diameter of the needle tube 1.

[0038] The minimum outer diameter of the press-fit part 12 is between the maximum and minimum inner diameter of the groove 25 slope 26.

[0039] The needle tube 1 is an open-ended needle tube. The end face of the contact portion 21 is a spherical arc surface 4. The spherical arc surface 4 can be used for point contact with adjacent connectors, and can also achieve good contact conduction in multiple directions.

[0040] Example 3,

[0041] like Figure 5 As shown, the self-riveting compressible connector includes a needle shaft 2, a needle tube 1, and a spring 3. The spring 3 is disposed inside the needle tube 1. The needle shaft 2 includes a sliding part and a contact part 21. The sliding part is slidably disposed inside the needle tube 1 and contacts the spring 3. The contact part 21 is located outside the needle tube 1. The contact part 21 is provided with a groove 25 facing the inner end face of the needle tube 1. The groove 25 has a slope 26 inclined towards the axis. A pressing part 12 is provided at the opening of the needle tube 1. When the needle shaft 2 is pressed into the needle tube 1, the groove 25 of the needle shaft 2 squeezes the pressing part 12 of the needle tube 1. The pressing part 12 forms a narrowed opening 13 through non-elastic deformation. The sliding part of the needle shaft 2 is restricted inside the needle tube 1 by the narrowed opening 13.

[0042] The sliding part has a sliding end 23 that matches the shaft hole 11 of the needle tube 1 and a connecting rod 22. The connecting rod 22 is disposed between the sliding end 23 and the contact part 21. The end face of the sliding end 23 is provided with an inclined surface 28 that is connected to the spring 3.

[0043] A limiting step 27 is provided between the sliding end 23 and the connecting rod 22. Under the action of the spring 3, the limiting step 27 abuts against the closing part 13 of the needle shaft 2.

[0044] The thickness of the crimped portion 12 gradually decreases from the main body of the needle tube 1 towards the opening. The outer diameter of the contact portion 21 is larger than the outer diameter of the needle tube 1.

[0045] The minimum outer diameter of the press-fit part 12 is between the maximum and minimum inner diameter of the groove 25 slope 26.

[0046] The end face of the contact part 21 is the contact plane 24. The needle tube 1 is a needle tube 1 with one end open.

[0047] An insulating ball 5 is provided between the inclined surface 28 and the spring 3. The insulating ball 5 isolates the needle shaft 2 from the spring 3, so that the current flowing through the needle shaft 2 can only flow to the needle tube 1. At the same time, the insulating ball 5 reverses the direction of the spring force of the spring 3, so that the spring 3 applies the spring force to the inclined surface 28 of the sliding end 23 in an inclined direction through the insulating ball 5, so that the needle shaft 2 is in a slightly inclined position, ensuring that the sliding end 23 is always in communication with the inner wall of the needle tube 1.

[0048] Example 4,

[0049] like Figure 6As shown, the self-riveting compressible connector includes a needle shaft 2, a needle tube 1, and a spring 3. The spring 3 is disposed inside the needle tube 1. The needle shaft 2 includes a sliding part and a contact part 21. The sliding part is slidably disposed inside the needle tube 1 and contacts the spring 3. The contact part 21 is located outside the needle tube 1. The contact part 21 is provided with a groove 25 facing the inner end face of the needle tube 1. The groove 25 has a slope 26 inclined towards the axis. A pressing part 12 is provided at the opening of the needle tube 1. When the needle shaft 2 is pressed into the needle tube 1, the groove 25 of the needle shaft 2 squeezes the pressing part 12 of the needle tube 1. The pressing part 12 forms a narrowed opening 13 through non-elastic deformation. The sliding part of the needle shaft 2 is restricted inside the needle tube 1 by the narrowed opening 13.

[0050] The sliding part has a sliding end 23 that matches the shaft hole 11 of the needle tube 1 and a connecting rod 22. The connecting rod 22 is disposed between the sliding end 23 and the contact part 21. The end face of the sliding end 23 is provided with an inclined surface 28 that is connected to the spring 3.

[0051] A limiting step 27 is provided between the sliding end 23 and the connecting rod 22. Under the action of the spring 3, the limiting step 27 abuts against the closing part 13 of the needle shaft 2.

[0052] The thickness of the crimped portion 12 gradually decreases from the main body of the needle tube 1 towards the opening. The outer diameter of the contact portion 21 is larger than the outer diameter of the needle tube 1.

[0053] The minimum outer diameter of the press-fit part 12 is between the maximum and minimum inner diameter of the groove 25 slope 26. The end face of the contact part 21 is the contact plane 24.

[0054] The needle tube 1 is an open-ended needle tube 1. Two needle shafts 2 are provided inside the needle tube 1, one of which is the aforementioned needle shaft 2, and the other is a second needle shaft 6. One end of the second needle shaft 6, the sliding end 61, is confined inside the needle tube 1, and the contact end 62 of the other end of the second needle shaft 6 is exposed outside the needle tube 1. The two needle shafts 2 form a double-headed compressible spring needle connector, and the spring 3 is disposed between the two needle shafts.

[0055] This invention has a reasonable structure, novel design, and strong practicality. During the process of pressing the needle shaft 2 into the needle tube 1, the groove 25 closes the opening of the needle tube 1, allowing the needle shaft 2 to be slidably mounted on the needle tube 1 without easily detaching from it. The needle shaft 2 also functions as a fixture, serving as both a product and a fixture, greatly simplifying the assembly process of the needle shaft 2 and the needle tube 1 and solving the disadvantages of high cost and low production capacity of the riveting process. With the same total length, the groove 25 can increase the stroke of the needle shaft 2.

[0056] The above does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic clinch compressible connector characterized by, The needle shaft, the needle tube and the spring, the spring is arranged in the needle tube, the needle shaft includes sliding part and contact part, the sliding part is arranged in the needle tube and is in contact with the spring, the contact part is located outside the needle tube, the contact part is provided with a groove towards the inner end surface of the needle tube, the groove has a slope surface inclined to the center, the opening of the needle tube is provided with a riveting part, when the needle shaft is pressed into the needle tube, the groove of the needle shaft extrudes the riveting part of the needle tube, the riveting part forms a reduced aperture through non-elastic deformation, the sliding part of the needle shaft is limited in the needle tube through the reduced aperture; the hardness of the needle shaft needs to be higher than that of the needle tube; the sliding part has a sliding end matched with the shaft hole of the needle tube, a connecting rod is arranged between the sliding end and the contact part, the end surface of the sliding end is provided with an inclined surface connected with the spring; a limiting step is arranged between the sliding end and the connecting rod, the limiting step abuts against the reduced aperture under the action of the spring; the thickness of the riveting part gradually decreases from the main body of the needle tube to the opening direction; an insulating ball is arranged between the inclined surface and the spring.

2. The self-pinning compressible connector of claim 1, wherein, The minimum outer diameter of the riveting part is between the maximum inner diameter and the minimum inner diameter of the groove slope surface.

3. The self-piercing rivet compressible connector of claim 1, wherein, The outer diameter of the contact part is greater than the outer diameter of the needle tube.

4. The self-piercing rivet compressible connector of claim 1, wherein, The end surface of the contact part is a contact plane.

5. The self-piercing rivet compressible connector of claim 1, wherein, The end surface of the contact part is a spherical arc surface.

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