Large-current-resistant low-frequency multi-core floating connector, manufacturing method and tool

Abstract

The invention discloses a high-current-resistant low-frequency multi-core floating connector, a manufacturing method and a tool, and relates to the technical field of low-frequency multi-core floating connectors, the connector comprises a shell, an insulating medium, a contact spring and a needle body, a needle tube is arranged in the shell, the insulating medium is arranged between the outer wall of the needle tube and the inner wall of the shell, and the contact spring is arranged between the needle tube and the inner wall of the shell. The needle body and the contact spring are arranged in the needle tube, the needle body is connected with the top of the contact spring, the needle body partially extends out of the needle tube and the shell, and the needle tube is in sliding contact with the needle body; a slope is arranged at the bottom of the needle body, the lower end of the slope is in contact with the contact spring, force applied to the needle body by the contact spring and the axial axis of the needle body form a certain included angle in the assembling and using process, the needle body is in close contact with the needle tube under the action of elastic force, and therefore electric signals are mainly transmitted from the needle body to the needle tube. The current conduction path is changed through structural design optimization, the mode that current passes through the interior of the spring is reduced or avoided, and the large current resistance of the connector is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-frequency multi-core floating connectors, and more specifically to the technical field of a large current-resistant low-frequency multi-core floating connector, a manufacturing method and tooling, which is used to achieve electrical performance interconnection between boards. Background Art

[0002] The traditional low-frequency connection form, taking the J30J connector as an example, is mainly completed by docking the socket in the module with the connector plug, and the two modules are connected by cables. Therefore, four devices and a cable are usually required to complete the low-frequency interconnection, which takes up a large space and makes it difficult to achieve high integration and miniaturization of the product.

[0003] At least one end of the low-frequency multi-core floating connector is a floating end. It is a way to achieve inter-board interconnection. The low-frequency multi-core floating connector mainly realizes electrical connection by directly compressing the floating needle in the connector with the module or PCB board without the need for socket insertion. Low-frequency floating connection can adopt single-end floating or double-end floating according to product structure requirements, which can greatly save the internal structure space of the product, reduce the volume, and thus improve the miniaturization, modularization and lightweight of electronic equipment. The existing low-frequency multi-core floating connector has the following problems in actual application:

[0004] 1. The currently commonly used low-frequency multi-core floating connector structure is mostly a spring connected to a needle. When a large current passes through, eddy currents will appear inside the spring and affect the electrical connection. Therefore, the design and selection of low-frequency multi-core floating connection structures are limited, making it difficult to achieve the most ideal line or product structure;

[0005] 2. Under vibration conditions, low-frequency multi-core floating connectors will be subjected to vibration stress in multiple directions, resulting in repeated axial compression, radial floating, and tilt vibration of the floating needle. If the connector reliability is low, it is very likely to fail in this situation. The current vibration reliability screening method for low-frequency multi-core floating connectors is likely to cause unqualified devices to be directly applied to products, and the connectors are small and precise, making it difficult to screen them through conventional testing methods;

[0006] 3. In connector assembly, the floating needle compression is often difficult to achieve accurately according to the design amount. Since the contact pressure will change with the floating needle compression, the contact resistance will change with the contact pressure, which will affect the electrical performance parameters of the equipment. Therefore, it is urgent to accurately control the floating compression in the connection structure design and assembly process to ensure the stability of connector performance. Summary of the invention

[0007] The purpose of the present invention is to solve the technical problems that existing devices cannot pass large currents, floating needles are stuck, and compression control is difficult to achieve accurately. The present invention provides a large current resistant low frequency multi-core floating connector, a manufacturing method and tooling.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] The first aspect of the present invention provides a high-current low-frequency multi-core floating connector, comprising a housing, an insulating medium, a contact spring and a needle body, wherein a needle tube is arranged in the housing, the insulating medium is arranged between the outer wall of the needle tube and the inner wall of the housing, the needle body and the contact spring are both arranged in the needle tube, and the needle body is connected to the top of the contact spring, the needle body part extends out of the needle tube and the housing, and the needle tube and the needle body are in sliding contact;

[0010] An inclined surface is provided at the bottom of the needle body, and the lower end of the inclined surface is in contact with the contact spring. During assembly and use, the force applied to the needle body by the contact spring forms a certain angle with the axial axis of the needle body. The needle body is in close contact with the needle tube under the action of elastic force, thereby realizing the transmission of electrical signals mainly from the needle body to the needle tube.

[0011] Specifically, the current transmission path is optimized through structural design, and a parallel circuit of spring-needle body and needle body-needle tube is formed when the current passes through. When the electrical signal passes through, the current passing through the spring is about 1 / 31 of the total current, reducing the risk of "eddy current" and achieving the design requirement that the low-frequency multi-core floating connector can pass large current (>2.5A).

[0012] In one embodiment, the needle body includes a first connecting portion and a needle tip portion disposed on the first connecting portion, the bottom of the first connecting portion is an upwardly inclined surface, and the angle between the inclined surface and the vertical direction is 80° to 85°.

[0013] In one embodiment, the bottom of the needle tip is cylindrical, and the top of the needle tip is hemispherical.

[0014] In one embodiment, the first connecting portion is a regular quadrangular prism, and the edges of the regular quadrangular prism are all provided with acute chamfers.

[0015] A second aspect of the present invention provides a multi-directional vibration screening tool for vibration screening of the above-mentioned high-current resistant low-frequency multi-core floating connector.

[0016] In one embodiment, it includes a screening tool body for installing a low-frequency floating connector and a push rod of a push-pull force gauge connected to the top of the screening tool body, the push rod of the push-pull force gauge is connected to the push-pull force gauge, and the elastic floating contact surface of the screening tool body contacts the upper end surface of the low-frequency floating connector.

[0017] Specifically, we design screening tooling for connectors and perform vibration simulation on connectors to effectively screen out unqualified devices and reduce the risk of contact failure caused by vibration stress on connectors.

[0018] In one embodiment, the elastic floating contact surface is an arc-shaped surface.

[0019] In one embodiment, the low frequency floating connector is clamped on the bottom of the screening tool body by a fixing fixture.

[0020] Specifically, the low-frequency floating connector is fixed to the bottom of the screening tooling body by a fixing fixture, and then the screening tooling body is fixed to the push-pull force gauge by a push rod of the push-pull force gauge. The elastic floating contact surface of the screening tooling body is pressed down until it contacts the upper end surface of the low-frequency floating connector by pushing the push rod of the push-pull force gauge (the connector end surface must not be subjected to force). Since the elastic floating contact surface of the screening tooling body is a curved surface, the direction of the pressure on the connector contact needle changes with the change of the curved surface, simulating the actual use environment.

[0021] The third aspect of the present invention provides a riveting tooling structure for completing the assembly of the above-mentioned high-current, low-frequency, multi-core floating connector, including a riveting base, a riveting punch cooperating with the riveting base, and a guide ring. A head boss is arranged on the top of the riveting punch, and the guide ring wraps the riveting base and the head boss of the riveting punch respectively. A riveting opening is arranged at the bottom of the riveting punch.

[0022] Specifically, riveting refers to the process of connecting two or more parts together using rivets. Specifically, riveting is to use axial force to thicken the nail rod in the rivet hole and form a nail head, thereby firmly connecting multiple parts together.

[0023] In this solution, when the pin assembly of the high-current, low-frequency, multi-core floating connector is riveted, the inner conductor of the pin assembly is placed in the receiving hole of the riveting base, and the guide ring wraps the riveting base and the head boss of the riveting punch respectively, exerting downward force on the riveting punch to achieve the riveting effect of the pin assembly.

[0024] In addition, the compression of the floating needle can be accurately controlled from the perspectives of assembly technology, structural design, and riveting tooling design, so that the compression accuracy of the floating needle during assembly can be controlled to match the design value, effectively avoiding electrical performance failure caused by the compression not matching the design value.

[0025] The fourth aspect of the present invention provides a method for preparing a high-current low-frequency multi-core floating connector, which is used to prepare the above-mentioned high-current low-frequency multi-core floating connector, and is used in conjunction with the above-mentioned multi-directional vibration screening tooling and the above-mentioned riveting tooling structure, including the following steps:

[0026] S1. Complete the machining of the needle body, shell, insulating medium, contact spring and needle body according to the structural design;

[0027] S2, assembling the insulating medium, the contact spring and the needle body into the housing;

[0028] S3. Use the riveting tool to complete the floating end assembly of the low-frequency multi-core floating connector, control the height difference of each pin body to 1±0.1mm, ensure that after the low-frequency multi-core floating connector is normally installed, each contact piece is compressed by 1±0.1mm, and the elastic force value is evenly distributed between 0.4N and 1N;

[0029] S4. Use epoxy resin to pot the low-frequency multi-core floating connector;

[0030] S5. Use screening tooling to screen out unqualified products, and the connector is required to be able to be compressed normally for 50 cycles.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1. The present invention designs a high-current, low-frequency, multi-core floating connector to solve the problems of existing devices that cannot pass high currents, floating needles get stuck, and compression control is difficult to achieve accurately.

[0033] 2. The present invention designs a vibration screening tooling according to the characteristics of low-frequency multi-core floating connectors. The elastic floating contact surface of the screening tooling is a curved surface, which can simulate the actual use environment, effectively screen out defective products, effectively eliminate unqualified components, and ensure the consistency of the final product.

[0034] 3. The present invention realizes precise control of the compression of the floating needle from the perspectives of assembly technology, structural design, and riveting tooling design, and realizes accurate control of the single-core elastic force of the low-frequency multi-core floating connector pin assembly of 0.4 to 1N and the assembly compression accuracy of ±0.1mm, ensuring the connection reliability of the connector under assembly and vibration conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a structural schematic diagram of a multi-core floating connector capable of withstanding high current and low frequency;

[0037] Figure 2 The detailed structural design drawing of the needle body;

[0038] Figure 3 This is a multi-directional vibration screening tooling and principle diagram for low-frequency multi-core floating connectors;

[0039] Figure 4 It is a schematic diagram of the riveting tooling structure.

[0040] Figure numerals: 1-housing, 2-insulating medium, 3-contact spring, 4-needle body, 41-first connecting part, 42-needle tip, 5-riveting punch, 6-riveting base, 7-guide ring, 8-riveting mouth, 9-pushing rod of dynamometer, 10-screening tool body. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and technical effects of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] Example 1

[0046] like Figure 1 to Figure 2As shown, this embodiment provides a high-current low-frequency multi-core floating connector, including a shell 1, an insulating medium 2, a contact spring 3 and a needle body 4, a needle tube is arranged in the shell 1, the insulating medium 2 is arranged between the outer wall of the needle tube and the inner wall of the shell 1, the needle body 4 and the contact spring 3 are both arranged in the needle tube, and the needle body 4 is connected to the top of the contact spring 3, the needle body 4 partially extends out of the needle tube and the shell 1, and the needle tube and the needle body 4 are in sliding contact;

[0047] An inclined surface is provided at the bottom of the needle body 4, and the lower end of the inclined surface is in contact with the contact spring 3. During assembly and use, the force applied to the needle body 4 by the contact spring 3 forms a certain angle with the axial axis of the needle body 4. Under the action of the spring force of the contact spring 3, the needle body 4 achieves close contact with the needle tube, thereby realizing the transmission of electrical signals mainly from the needle body 4 to the needle tube.

[0048] Specifically, by optimizing the structural design and changing the current conduction path, the current can be reduced or avoided passing through the spring, thus improving the connector's ability to withstand high currents. The current diversion on the spring is about 1 / 31 of the total current, reducing the risk of "eddy current" and achieving the design requirements of low-frequency multi-core floating connectors passing high currents (>2.5A).

[0049] In one embodiment, the needle body 4 includes a first connecting portion 41 and a needle tip portion 42 disposed on the first connecting portion 41 . The bottom of the first connecting portion 41 is an upwardly inclined surface, and the angle between the inclined surface and the vertical direction is 80° to 85°.

[0050] In one embodiment, the bottom of the needle tip 42 is cylindrical, and the top of the needle tip 42 is hemispherical.

[0051] In one embodiment, the first connection portion 41 is a regular quadrangular prism, and the edges of the regular quadrangular prism are all provided with acute chamfers.

[0052] Example 2

[0053] like Figure 4 As shown, this embodiment provides a multi-directional vibration screening tool for vibration screening of the above-mentioned high-current resistant low-frequency multi-core floating connector.

[0054] In one embodiment, it includes a screening tool body 10 for installing a low-frequency floating connector and a push-pull force gauge push rod 9 connected to the top of the screening tool body 10, the push-pull force gauge push rod 9 is connected to the push-pull force gauge, and the elastic floating contact surface of the screening tool body 10 contacts the upper end surface of the low-frequency floating connector.

[0055] Specifically, we design screening tooling for connectors and perform vibration simulation on connectors to effectively screen out unqualified devices and reduce the risk of contact failure caused by vibration stress on connectors.

[0056] In one embodiment, the elastic floating contact surface is an arc-shaped surface.

[0057] In one embodiment, the low frequency floating connector is clamped at the bottom of the screening tool body 10 by a fixing fixture.

[0058] Specifically, the low-frequency floating connector is fixed to the bottom of the screening tooling body 10 by a fixing clamp, and then the screening tooling body 10 is fixed to the push-pull force gauge by the push-pull force gauge push rod 9. By pushing the push-pull force gauge push rod 9, the elastic floating contact surface of the screening tooling body 10 is pressed down to contact with the upper end surface of the low-frequency floating connector (the connector end surface must not be subjected to force). Since the elastic floating contact surface of the screening tooling body 10 is a curved surface, the direction of the pressure on the connector contact needle changes with the change of the curved surface, simulating the actual use environment.

[0059] Example 3

[0060] like Figure 3 As shown, this embodiment provides a riveting tooling structure for completing the assembly of the above-mentioned high-current low-frequency multi-core floating connector, including a riveting base 6, a riveting punch 5 cooperating with the riveting base 6, and a guide ring 7. A head boss is arranged on the top of the riveting punch 5, and the guide ring 7 wraps the riveting base 6 and the head boss of the riveting punch 5 respectively. A riveting opening 8 is arranged at the bottom of the riveting punch 5.

[0061] Specifically, riveting refers to the process of connecting two or more parts together using rivets. Specifically, riveting is to use axial force to thicken the nail rod in the rivet hole and form a nail head, thereby firmly connecting multiple parts together.

[0062] When the pin assembly of the high-current, low-frequency, multi-core floating connector is riveted in this solution, the inner conductor of the pin assembly is placed in the receiving hole of the riveting base 6, and the guide ring 7 wraps the riveting base 6 and the head boss of the riveting punch 5 respectively, exerting a downward force on the riveting punch 5 to achieve the riveting effect of the pin assembly.

[0063] In addition, the compression of the floating needle can be accurately controlled from the perspectives of assembly technology, structural design, and riveting tooling design, so that the compression accuracy of the floating needle during assembly can be controlled to match the design value, effectively avoiding electrical performance failure caused by the compression not matching the design value.

[0064] Example 4

[0065] This embodiment provides a method for preparing a high-current low-frequency multi-core floating connector, which is used to prepare the above-mentioned high-current low-frequency multi-core floating connector, and is used in conjunction with the above-mentioned multi-directional vibration screening tooling and the above-mentioned riveting tooling structure, including the following steps:

[0066] S1. Complete the machining of the needle body 4, the housing 1, the insulating medium 2, the contact spring 3 and the needle body 4 according to the structural design;

[0067] S2, assembling the insulating medium 2, the contact spring 3 and the needle body 4 into the housing 1;

[0068] S3. Use the riveting tool to complete the floating end assembly of the low-frequency multi-core floating connector, control the height difference of each pin body 4 to be 1±0.1mm, ensure that after the low-frequency multi-core floating connector is normally installed, each contact piece is compressed by 1±0.1mm, and the elastic force value is evenly distributed between 0.4N and 1N;

[0069] S4. Use epoxy resin to pot the low-frequency multi-core floating connector;

[0070] S5. Use screening tooling to screen out unqualified products, and the connector is required to be able to be compressed normally for 50 cycles.

Claims

1. A high current and low frequency multi-core floating connector, characterized in that: The invention comprises a shell (1), an insulating medium (2), a contact spring (3) and a needle body (4); a needle tube is arranged in the shell (1); the insulating medium (2) is arranged between the outer wall of the needle tube and the inner wall of the shell (1); the needle body (4) and the contact spring (3) are both arranged in the needle tube, and the needle body (4) is connected to the top of the contact spring (3); the needle body (4) partially extends out of the needle tube and the shell (1); and the needle tube and the needle body (4) are in sliding contact; The bottom of the needle body (4) is provided with an inclined surface, and the lower end of the inclined surface is in contact with the contact spring (3). During assembly and use, the force applied by the contact spring (3) to the needle body (4) forms a certain angle with the axial axis of the needle body (4). Under the action of the spring force of the contact spring (3), the needle body (4) is in close contact with the needle tube, thereby realizing the transmission of the current signal mainly from the needle body (4) to the needle tube.

2. A high current and low frequency multi-core floating connector according to claim 1, characterized in that: The needle body (4) comprises a first connecting portion (41) and a needle tip portion (42) arranged on the first connecting portion (41); the bottom of the first connecting portion (41) is an upwardly inclined surface, and the angle between the inclined surface and the vertical direction is 80° to 85°.

3. A high current and low frequency multi-core floating connector according to claim 2, characterized in that: The bottom of the needle tip (42) is cylindrical, and the top of the needle tip (42) is hemispherical.

4. A high current and low frequency multi-core floating connector according to claim 2, characterized in that: The first connecting portion (41) is a regular quadrangular prism, and the edges of the regular quadrangular prism are all provided with acute chamfers.

5. A multi-directional vibration screening tool, characterized in that: A high current resistant low frequency multi-core floating connector for vibration screening according to any one of claims 1 to 4.

6. A multi-directional vibration screening tool according to claim 5, characterized in that: It comprises a screening tool body (10) for installing a low-frequency floating connector and a push-pull force gauge push rod (9) connected to the top of the screening tool body (10), the push-pull force gauge push rod (9) is connected to the push-pull force gauge, and the elastic floating contact surface of the screening tool body (10) contacts the upper end surface of the low-frequency floating connector.

7. A multi-directional vibration screening tool according to claim 6, characterized in that: The elastic floating contact surface is an arc-shaped surface.

8. The multi-directional vibration screening tool according to claim 6, characterized in that: The low-frequency floating connector is clamped at the bottom of the screening tool body (10) by a fixing fixture.

9. A riveting tool structure, characterized in that: Used to complete the assembly of a high-current, low-frequency, multi-core floating connector according to any one of claims 1 to 4, comprising a riveting base (6), a riveting punch (5) cooperating with the riveting base (6), and a guide ring (7), wherein a head boss is arranged on the top of the riveting punch (5), and the guide ring (7) respectively wraps around the riveting base (6) and the head boss of the riveting punch (5), and a riveting opening (8) is arranged on the bottom of the riveting punch (5).

10. A method for preparing a high current low frequency multi-core floating connector, used for preparing a high current low frequency multi-core floating connector according to any one of claims 1 to 4, used in conjunction with a multi-directional vibration screening tooling according to any one of claims 5 to 8, and used in conjunction with a riveting tooling structure according to claim 9, characterized in that: The steps include: S1. Complete the machining of the needle body (4), the housing (1), the insulating medium (2), the contact spring (3) and the needle body (4) according to the structural design; S2, assembling the insulating medium (2), the contact spring (3) and the needle body (4) into the housing (1); S3. Use a riveting tool to complete the assembly of the floating end of the low-frequency multi-core floating connector, control the height difference of each pin body (4) to be 1±0.1mm, ensure that after the low-frequency multi-core floating connector is normally installed, each contact piece is compressed by 1±0.1mm, and the elastic force value is evenly distributed between 0.4N and 1N; S4. Use epoxy resin to pot the low-frequency multi-core floating connector; S5. Use screening tooling to screen out unqualified products, and the connector is required to be able to be compressed normally for 50 cycles.

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