A high current connector

Abstract

The utility model belongs to the field of connectors, and discloses a high-current connector, including: a needle tube, a needle shaft is inserted into the needle tube, an axial section is provided on one side of the needle shaft along the axial direction, a protrusion is provided on the inner wall of the needle tube opposite to the axial section, the protrusion extends along the axial direction of the needle tube, the surface of the protrusion is flat, and an elastic component for pressing the axial section of the needle shaft against the protrusion is provided inside the needle tube. The utility model sets the axial section on one side of the needle shaft, and sets the protrusion on the inner wall of the needle tube at the same time. When the needle shaft is pressed against the protrusion under the elastic force of the elastic component, the needle shaft and the inner wall of the needle tube are in surface contact, and the contact area of ​​the surface contact is larger than that of the line contact, and the contact resistance is reduced at this time; the protrusion is provided on the inner wall of the needle tube, and the thickness of the needle tube is increased at this time, and the volume resistance of the needle tube is reduced; the overall resistance of the connector of the utility model is small, and it can be more adapted to the high-current environment.

Description

Technical Field

[0001] The utility model belongs to the field of connectors, and in particular relates to a high-current connector. Background Art

[0002] Current connectors are electronic components that are primarily used to transfer current, ensuring unimpeded power transfer between various parts of electronic equipment. They are key components that connect different wires or circuit boards in a circuit and are widely used in a variety of electronic devices and systems, including but not limited to computers, communications equipment, home appliances, automobiles, and aerospace.

[0003] For example, the Chinese utility model patent with application number CN201420747049.9 discloses a connector terminal that can withstand large currents. The connector terminal consists of a terminal sleeve, a terminal column and a spring. Since the inner end of the terminal column has an inclined surface, the terminal column can be subjected to a thrust along the diameter direction under the action of the spring, and the surface of the conductive surface contacts the inner surface of the terminal sleeve and elastically squeezes each other.

[0004] However, in actual application, the connector terminal still has at least the following problems:

[0005] 1. The terminal column is a cylindrical structure. After the terminal column is tilted, the outer wall of the terminal column and the inner wall of the terminal sleeve are in line contact, and the contact resistance is large;

[0006] 2. The resistance of the connector is composed of contact resistance and volume resistance, and the volume resistance of the connector is relatively high, which leads to the overall high resistance of the connector. When running at high current, the connector generates high heat. Utility Model Content

[0007] The utility model aims to provide a high current connector to solve the problem that the overall resistance of the existing connector is relatively high, resulting in high heat generation of the connector when running at a high current.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-current connector, comprising: a needle tube, a needle shaft is inserted into the needle tube, an axial section is provided on one side of the needle shaft along the axial direction, a protrusion is provided on the inner wall of the needle tube opposite to the axial section, the protrusion extends along the axial direction of the needle tube, the surface of the protrusion is flat, and an elastic component for pressing the axial section of the needle shaft against the protrusion is provided inside the needle tube.

[0009] Preferably, the outer wall of the needle shaft is provided with a stepped surface along the circumferential direction.

[0010] Preferably, a thin-edged protrusion along the step surface is provided on the edge of the end opening of the needle tube, the thickness of the thin-edged protrusion is less than the thickness of the needle tube, and the thin-edged protrusion limits the step surface by deformation.

[0011] Preferably, the outer end of the needle shaft is in the form of a hemispherical surface, and a cross-section is provided on the hemispherical surface along the radial direction of the needle shaft.

[0012] Preferably, a wedge-shaped surface is provided on the outer wall of the needle shaft on the side opposite to the axial section, and the elastic component abuts against the wedge-shaped surface.

[0013] Preferably, the elastic component comprises: a spring and a conductive steel ball, and the spring presses the conductive steel ball against the wedge surface.

[0014] Preferably, the needle tube and the needle shaft are both made of brass or tellurium copper.

[0015] Preferably, the outer diameter of the needle shaft is smaller than the inner diameter of the needle sleeve.

[0016] Beneficial effects:

[0017] 1. The utility model provides an axial section on one side of the needle shaft and a protrusion on the inner wall of the needle tube. When the needle shaft is pressed against the protrusion under the elastic force of the elastic component, the needle shaft and the inner wall of the needle tube are in surface contact. The contact area of ​​the surface contact is larger than that of the line contact, thereby reducing the contact resistance.

[0018] 2. A protrusion is provided on the inner wall of the needle tube of the utility model, which increases the thickness of the needle tube and reduces the volume resistance of the needle tube; thus, the overall resistance of the connector of the utility model is smaller and can better adapt to a large current environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0020] Figure 1 It is a cross-sectional view of the internal partial structure of a high current connector provided by one embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the state of the first assembly process of the needle shaft and needle tube of the high-current connector provided by one embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the state of the second assembly process of the needle shaft and needle tube of the high current connector provided by one embodiment of the utility model;

[0023] Figure 4This is a schematic diagram of the state of the third assembly process of the needle shaft and needle tube of the high current connector provided by one embodiment of the utility model;

[0024] Figure 5 It is a cross-sectional view of the internal overall structure of a high-current connector provided by one embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Needle tube; 2. Needle shaft; 3. Axial section; 4. Raised portion; 5. Step surface; 6. Thin-edge raised portion; 7. Cross section; 8. Wedge-shaped surface; 9. Spring; 10. Conductive steel ball. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0028] Embodiment 1

[0029] Figure 1 FIG. 1 is a cross-sectional view of the overall structure of a high current connector provided by an embodiment of the present invention. Figure 1 As shown, this embodiment provides a high-current connector, including: a needle tube 1, a needle shaft 2 is inserted into the needle tube 1, an axial section 3 is provided on one side of the needle shaft 2 along the axial direction, a protrusion 4 is provided on the inner wall of the needle tube 1 opposite to the axial section 3, the protrusion 4 extends axially along the needle tube 1, the surface of the protrusion 4 is flat, and an elastic component for pressing the axial section 3 of the needle shaft 2 against the protrusion 4 is provided inside the needle tube 1.

[0030] In the present embodiment, the needle tube 1 is in a tubular structure, and the needle shaft 2 is inserted in the needle tube 1. The needle shaft 2 can be telescopically moved in the needle tube 1. When the needle shaft 2 moves into the needle tube 1, under the action of the elastic component, the needle shaft 2 is subjected to a radial thrust, so that the outer wall of the needle shaft 2 fits against the inner wall of the needle tube 1; the outer diameter of the needle shaft 2 in the present embodiment is smaller than the inner diameter of the needle tube 1, that is, there is a certain gap between the needle shaft 2 and the needle tube 1, which facilitates the telescopic movement of the needle shaft 2 in the needle tube 1.

[0031] Since an axial section 3 is provided on one side of the needle shaft 2 and a protrusion 4 is provided on the inner wall of the needle tube 1, when the needle shaft 2 is pressed against the protrusion 4 under the elastic force of the elastic component, the needle shaft 2 and the inner wall of the needle tube 1 are in surface contact. The contact area of ​​the surface contact is larger than that of the line contact, thereby reducing the contact resistance.

[0032] In this embodiment, when the thickness of the needle tube 1 is greater, the volume resistance of the needle tube 1 is smaller, but the greater the thickness of the needle tube 1, the larger the volume of the needle tube 1 will be, and the cost will also increase; therefore, the thickness of the needle tube 1 can be flexibly adjusted according to the current requirements and the volume of the connector.

[0033] In this embodiment, a protrusion 4 is provided on the inner wall of the needle tube 1, thereby increasing the thickness of the needle tube 1 and reducing the volume resistance of the needle tube 1; thus, the overall resistance of the connector of the utility model is smaller and can better adapt to a large current environment.

[0034] In this embodiment, the wall thickness of the needle tube 1 can be adjusted according to actual needs, such as increasing or reducing the wall thickness; the axial section 3 of the needle shaft 2 is a rectangular plane, and the length of the needle shaft 2 can be increased to increase the contact area between the axial section 3 and the raised portion 4, thereby reducing the contact resistance.

[0035] Embodiment 2

[0036] Figure 1 FIG. 1 is a cross-sectional view of the overall structure of a high current connector provided by an embodiment of the present invention. Figure 1 As shown, this embodiment provides a high-current connector, including: a needle tube 1, a needle shaft 2 is inserted into the needle tube 1, an axial section 3 is provided on one side of the needle shaft 2 along the axial direction, a protrusion 4 is provided on the inner wall of the needle tube 1 opposite to the axial section 3, the protrusion 4 extends axially along the needle tube 1, the surface of the protrusion 4 is flat, and an elastic component for pressing the axial section 3 of the needle shaft 2 against the protrusion 4 is provided inside the needle tube 1.

[0037] In the present embodiment, the needle tube 1 is in a tubular structure, and the needle shaft 2 is inserted in the needle tube 1. The needle shaft 2 can be telescopically moved in the needle tube 1. When the needle shaft 2 moves into the needle tube 1, under the action of the elastic component, the needle shaft 2 is subjected to a radial thrust, so that the outer wall of the needle shaft 2 fits against the inner wall of the needle tube 1; the outer diameter of the needle shaft 2 in the present embodiment is smaller than the inner diameter of the needle tube 1, that is, there is a certain gap between the needle shaft 2 and the needle tube 1, which facilitates the telescopic movement of the needle shaft 2 in the needle tube 1.

[0038] Since an axial section 3 is provided on one side of the needle shaft 2 and a protrusion 4 is provided on the inner wall of the needle tube 1, when the needle shaft 2 is pressed against the protrusion 4 under the elastic force of the elastic component, the needle shaft 2 and the inner wall of the needle tube 1 are in surface contact. The contact area of ​​the surface contact is larger than that of the line contact, thereby reducing the contact resistance.

[0039] In this embodiment, when the thickness of the needle tube 1 is greater, the volume resistance of the needle tube 1 is smaller, but the greater the thickness of the needle tube 1, the larger the volume of the needle tube 1 will be, and the cost will also increase; therefore, the thickness of the needle tube 1 can be flexibly adjusted according to the current requirements and the volume of the connector.

[0040] In this embodiment, a protrusion 4 is provided on the inner wall of the needle tube 1, thereby increasing the thickness of the needle tube 1 and reducing the volume resistance of the needle tube 1; thus, the overall resistance of the connector of the utility model is smaller and can better adapt to a large current environment.

[0041] As a further optimization of this embodiment, the outer wall of the needle shaft 2 is provided with a step surface 5 along the circumferential direction, and the step surface 5 is arranged on the non-axial section 3. The edge of the step surface 5 can be a right-angle structure or an arc structure.

[0042] In this embodiment, if Figure 2 , Figure 3 and Figure 4 As shown, a thin-edged protrusion 6 along the step surface 5 is provided on the edge of the end opening of the needle tube 1, and the thickness of the thin-edged protrusion 6 is less than the thickness of the needle tube 1, and the thin-edged protrusion 6 limits the step surface 5 by deformation;

[0043] The arc length of the thin-edge protrusion 6 of this embodiment is the same as the arc shape of the step surface 5. Since the thickness of the thin-edge protrusion 6 is relatively thin, an extrusion force can be applied to the thin-edge protrusion 6 to make the thin-edge protrusion 6 fold inward. After the thin-edge protrusion 6 is folded, it can play a role in limiting the needle shaft 2 and prevent the needle shaft 2 from slipping.

[0044] During the assembly of the needle tube 1 and the needle shaft 2, press Figure 2-Figure 4 The needle shaft 2 is first inserted into the needle tube 1, that is, Figure 2 When the stepped surface 5 on the needle shaft 2 is inserted into the needle tube 1, that is, Figure 3 In the state shown in FIG. 1 , an extrusion force is applied to the thin edge protrusion 6 to fold the thin edge protrusion 6 inwardly to limit the needle shaft 2; the state after the thin edge protrusion 6 is folded inwardly is as shown in FIG. Figure 4 shown.

[0045] The thin-edge protrusion 6 of this embodiment is provided to facilitate positioning. This structure is simpler than the screw locking method and does not require additional tapping. The connector is easy to assemble, saves costs, and reduces the number of steps.

[0046] As a further optimization of this embodiment, the outer end of the needle shaft 2 is in a hemispherical surface, and a cross-section 7 is provided on the hemispherical surface along the radial direction of the needle shaft 2 .

[0047] In this embodiment, the needle tube 1 and the needle shaft 2 are both made of brass or tellurium copper. Using tellurium copper as the material can increase conductivity and effectively reduce resistance. At the same time, its cost-effectiveness of conductive current is 2.5 times that of brass, which can effectively reduce costs. Brass has good machinability, conductivity and low price.

[0048] Embodiment 3

[0049] Figure 1 FIG. 1 is a cross-sectional view of the overall structure of a high current connector provided by an embodiment of the present invention. Figure 1 As shown, this embodiment provides a high-current connector, including: a needle tube 1, a needle shaft 2 is inserted into the needle tube 1, an axial section 3 is provided on one side of the needle shaft 2 along the axial direction, a protrusion 4 is provided on the inner wall of the needle tube 1 opposite to the axial section 3, the protrusion 4 extends axially along the needle tube 1, the surface of the protrusion 4 is flat, and an elastic component for pressing the axial section 3 of the needle shaft 2 against the protrusion 4 is provided inside the needle tube 1.

[0050] In the present embodiment, the needle tube 1 is in a tubular structure, and the needle shaft 2 is inserted in the needle tube 1. The needle shaft 2 can be telescopically moved in the needle tube 1. When the needle shaft 2 moves into the needle tube 1, under the action of the elastic component, the needle shaft 2 is subjected to a radial thrust, so that the outer wall of the needle shaft 2 fits against the inner wall of the needle tube 1; the outer diameter of the needle shaft 2 in the present embodiment is smaller than the inner diameter of the needle tube 1, that is, there is a certain gap between the needle shaft 2 and the needle tube 1, which facilitates the telescopic movement of the needle shaft 2 in the needle tube 1.

[0051] Since an axial section 3 is provided on one side of the needle shaft 2 and a protrusion 4 is provided on the inner wall of the needle tube 1, when the needle shaft 2 is pressed against the protrusion 4 under the elastic force of the elastic component, the needle shaft 2 and the inner wall of the needle tube 1 are in surface contact. The contact area of ​​the surface contact is larger than that of the line contact, thereby reducing the contact resistance.

[0052] In this embodiment, when the thickness of the needle tube 1 is greater, the volume resistance of the needle tube 1 is smaller, but the greater the thickness of the needle tube 1, the larger the volume of the needle tube 1 will be, and the cost will also increase; therefore, the thickness of the needle tube 1 can be flexibly adjusted according to the current requirements and the volume of the connector.

[0053] In this embodiment, a protrusion 4 is provided on the inner wall of the needle tube 1, thereby increasing the thickness of the needle tube 1 and reducing the volume resistance of the needle tube 1; thus, the overall resistance of the connector of the utility model is smaller and can better adapt to a large current environment.

[0054] As a further optimization of this embodiment, Figure 5 As shown, a wedge-shaped surface 8 is provided on the outer wall of the needle shaft 2 on the side opposite to the axial section 3, and the elastic component abuts against the wedge-shaped surface 8;

[0055] In this embodiment, the elastic component includes: a spring 9 and a conductive steel ball 10 , and the spring 9 presses the conductive steel ball 10 against the wedge surface 8 .

[0056] In this embodiment, the contact area between the needle shaft 2 and the needle tube 1 is increased, and the required pressure is also increased to fully reduce the contact resistance. To increase the contact force between the needle tube 1 and the needle shaft 2, it is necessary to increase the elastic force of the spring 9 or increase the slope angle of the wedge surface 8 of the needle shaft 2. When the contact force increases, the friction force will also increase. In order to prevent the friction force from being too large, it is necessary to reduce the friction coefficient. To reduce the friction coefficient, it is necessary to reduce the roughness of the contact part of the needle tube 1 and the needle shaft 2. The contact is more complete when the roughness is reduced, and the contact resistance is also smaller.

[0057] Increasing the bevel angle of the wedge-shaped surface 8 of the needle shaft 2 can effectively increase the contact force between the needle tube 1 and the needle shaft 2, while the friction between the needle tube 1 and the needle shaft 2 increases slightly. Therefore, selecting a larger bevel angle of the needle shaft 2 can effectively reduce the contact resistance between the needle tube 1 and the needle shaft 2, while the friction does not increase much, thereby ensuring the smoothness of the operation of the needle shaft 2. The bevel angle of the wedge-shaped surface 8 of the needle shaft 2 should be greater than 20 degrees, and should be selected according to actual conditions.

[0058] In this embodiment, if Figure 5 As shown, the needle shaft 2 has a needle tail at the wedge surface 8, and the length of the needle tail needs to be greater than the radius of the conductive steel ball 10 (the radius of the conductive steel ball 10 is as large as possible), and at this time, the protrusion 4 of the needle tube 1 can contact the axial section 3 of the needle shaft 2. Preferably, the length L of the needle tail in this embodiment is greater than rcos a (L>rcos a ), where r is the radius of the conductive steel ball 10, a is the slope angle of the wedge-shaped surface 8. This structure can make the overall structure of the connector more compact, thus gaining valuable space for increasingly miniaturized electronic products.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high current connector, characterized in that: include: A needle tube (1), wherein a needle shaft (2) is inserted into the needle tube (1), an axial section (3) is provided on one side of the needle shaft (2) along the axial direction, a raised portion (4) is provided on the inner wall of the needle tube (1) opposite to the axial section (3), the raised portion (4) extends along the axial direction of the needle tube (1), the surface of the raised portion (4) is flat, and an elastic component for pressing the axial section (3) of the needle shaft (2) against the raised portion (4) is provided inside the needle tube (1).

2. The high current connector according to claim 1, characterized in that: The outer wall of the needle shaft (2) is provided with a stepped surface (5) along the circumferential direction.

3. The high current connector according to claim 2, characterized in that: A thin-edged protrusion (6) along the stepped surface (5) is provided on the edge of the end opening of the needle tube (1); the thickness of the thin-edged protrusion (6) is less than the thickness of the needle tube (1); and the thin-edged protrusion (6) limits the stepped surface (5) by deformation.

4. The high current connector according to claim 1, characterized in that: The outer end of the needle shaft (2) is in the form of a hemispherical surface, and a cross-section (7) is provided on the hemispherical surface along the radial direction of the needle shaft (2).

5. The high current connector according to claim 1, characterized in that: A wedge-shaped surface (8) is provided on the outer wall of the needle shaft (2) on the side opposite to the axial section (3), and the elastic component abuts against the wedge-shaped surface (8).

6. The high current connector according to claim 5, characterized in that: The elastic component comprises a spring (9) and a conductive steel ball (10), wherein the spring (9) presses the conductive steel ball (10) against the wedge surface (8).

7. The high current connector according to any one of claims 1 to 6, characterized in that: The needle tube (1) and the needle shaft (2) are both made of brass or tellurium copper.

8. The high current connector according to any one of claims 1 to 6, characterized in that: The outer diameter of the needle shaft (2) is smaller than the inner diameter of the needle sleeve.

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