A fisheye terminal, contact, and connector

Abstract

The utility model relates to electric connector technical field especially relates to a kind of fish eye terminal, contact and connector.Fish eye terminal includes press-fitting part, press-fitting part includes two elastic contact arms, and the deformation space enclosed by two elastic contact arms is equipped with support spring, support spring is connected with the elastic contact arm on both sides to thereby divide deformation space into fish eye groove on the positive and negative sides of press-fitting part, the both sides of support spring are higher than middle position in the width direction of press-fitting part and present V shape, the middle section of support spring is parallel to the direction of extension in the length direction of press-fitting part, and the sheet body part of support spring on the both sides of middle section is inclined transition with middle section, and make support spring in length direction overall present the groove type structure that both ends are higher than middle section in front and back, after terminal insertion printed board conductive hole, the holding force between press-fitting part and printed board can be increased, and fish eye terminal is more not prone to loose, to improve fish eye terminal performance stability.

Description

Technical Field

[0001] This utility model relates to the field of electrical connector technology, and in particular to a fisheye terminal, contact element and connector. Background Technology

[0002] At present, the intelligentization and connectivity of new energy vehicles are developing rapidly, and the application of fisheye terminals, as key components for signal transmission, is increasing in the automotive environment. Traditional hollow fisheye terminals have low holding force and poor performance stability, which cannot meet the requirements of the automotive environment. On the other hand, conventional solid fisheye terminals have too high pressing force, making assembly difficult and prone to problems such as cracking of printed circuit boards.

[0003] Chinese utility model patent CN222440878U discloses a solid fisheye terminal. The solid fisheye terminal includes a flat main body (i.e., a press-fit part), the flat main body has two oppositely arranged side walls (i.e., two elastic contact arms) and a connecting wall (i.e., a support spring) connected between the two side walls. The connecting wall is connected at the middle position in the thickness direction of the two side walls and is straight. The flat main body includes a large diameter holding part and a pointed corner guide part extending forward from the front end of the large diameter holding part. On the inner side of the two side walls, at the position corresponding to the large diameter holding part, a deformation groove extending in the same direction as the large diameter holding part is formed. The extension range of the deformation groove along the length direction of the terminal does not exceed the length range of the large diameter holding part along the length direction of the terminal. The solid fisheye terminal improves the elastic deformation capability of the large-diameter retaining part by opening deformation grooves on the inner side of both side walls, thereby reducing the insertion force when the solid fisheye terminal is inserted into the conductive hole of the printed circuit board and enhancing the retaining force between the solid fisheye terminal and the PCB board. However, the enhancement of the fisheye terminal retaining force by this structure is very limited and is not sufficient to meet the application requirements of high vibration environments such as automotive.

[0004] To enhance the holding force of fisheye terminals, engineers have continuously improved their structural designs. For example, Chinese utility model patent CN214378953U discloses a non-through-hole fisheye terminal that offers various structural forms for the press-fit section. For instance, the cross-section of the support spring connecting the two elastic contact arms is designed as an S-shape or a multi-segment continuous bend, making it easier for the support spring to deform under pressure. This reduces the insertion force of the fisheye terminal into the conductive hole of the printed circuit board and allows the support spring to provide greater elastic holding force to the elastic contact arms on both sides. However, it has been proven that the holding force of this type of fisheye terminal is still relatively small, and it is still prone to dislodging from the conductive hole of the printed circuit board under vibration conditions. Its performance stability remains poor and it cannot meet the requirements of the automotive environment. Utility Model Content

[0005] The purpose of this utility model is to provide a fisheye terminal to solve the problems of low holding force and poor performance stability of existing fisheye terminals; the purpose of this utility model is also to provide a contact to solve the problem of unreliable contact connection caused by low holding force and poor performance stability of existing contact fisheye terminals; the purpose of this utility model is also to provide a connector to solve the problem of poor connector performance stability caused by unreliable contact connection of existing connectors.

[0006] The fisheye terminal of this utility model adopts the following technical solution:

[0007] A fisheye terminal includes a press-fit portion for insertion into a conductive hole on a printed circuit board. The press-fit portion includes two opposing elastic contact arms. Each elastic contact arm includes a front guide section, a middle holding section, and a rear support section along its length. The two elastic contact arms enclose a deformation space. A support spring is provided within the deformation space. The support spring is connected to the elastic contact arms on both sides, thereby dividing the deformation space into fisheye grooves on both sides of the press-fit portion. In the width direction of the press-fit portion, the two sides of the support spring are higher than the middle position and form a V shape, so that it deforms when compressed and provides an elastic force to the elastic contact arms on both sides to expand outward. In the length direction of the press-fit portion, the middle section of the support spring extends parallel to the insertion direction. The sheet portions on the front and rear sides of the middle section of the support spring are inclined to transition with the middle section, so that the support spring has a groove-shaped structure with the front and rear ends higher than the middle section in the length direction, so that the sheet portions on the front and rear sides of the middle section provide a greater elastic force to the elastic contact arms than the middle section.

[0008] Furthermore, the plate parts on the front and rear sides of the middle section of the supporting spring plate and the inclined transition points of the middle section correspond to the transition connection points of the front guide section and the middle holding section of the two elastic contact arms, and the transition connection points of the tail support section and the middle holding section, respectively.

[0009] Furthermore, the angle between the supporting sections of the spring sheet located on the front and rear sides of the middle section and the inclined transition point of the middle section is 5° to 15°.

[0010] Furthermore, in the width direction of the press-fit section, the width of the support spring is 0.4 to 0.7 times the width of the press-fit section, and the included angle between the two sides of the support spring is 90° to 150°.

[0011] Furthermore, the thickness of the support spring is 0.1 to 0.35 times the thickness of the press-fit part.

[0012] Furthermore, in the thickness direction of the press-fit section, the cross-sections of the two elastic contact arms are hexagonal and adjacent sides are connected by arc segments. Each elastic contact arm has an inner surface, an outer contact surface for contacting the conductive holes of the printed circuit board, two sides in the thickness direction, and an inclined surface connecting the outer contact surface and the two sides in the thickness direction. The inner surface is connected to the support spring. The angle between the outer contact surface and the two inclined surfaces is 20° to 40°. The width of the outer contact surface is 1 / 3 to 2 / 3 of the thickness of the press-fit section. The arc segments connecting the outer contact surface and the two inclined surfaces, as well as the arc segments connecting the two sides in the thickness direction and the two inclined surfaces, are on the same circumference or inscribed in the same circle.

[0013] Furthermore, the middle retaining section of the two elastic contact arms is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit section.

[0014] Furthermore, the front ends of the two elastic contact arms are inclined inward and connected to form the front guide section, and the rear ends are inclined inward and connected to form the rear support section. The included angle of the front and rear inclined inward is 20° to 60°, and the included angle of the rear inclined inward is greater than the included angle of the front inclined inward, so that the rear support section of the two elastic contact arms has stronger resistance to deformation than the front guide section.

[0015] Beneficial Effects: This utility model fisheye terminal is an improved invention. By improving the structure of the supporting spring, in the width direction of the pressing part, the two sides of the supporting spring are made higher than the middle position, forming a V shape. When the elastic contact arms on both sides are squeezed by the conductive holes of the printed circuit board, the supporting spring undergoes elastic deformation under pressure, thereby generating an outward elastic force on the elastic contact arms on both sides. The deformation of the supporting spring is concentrated at the root, and the generated elastic force acts entirely on the elastic contact arms on both sides, thus increasing the holding force between the elastic contact arms on both sides and the printed circuit board. In the length direction of the pressing part, the middle section of the supporting spring extends parallel to the insertion direction, and the sheet portions on both sides of the middle section of the supporting spring are... The design features a sloped transition to the middle section, resulting in a groove-shaped structure where the front and rear ends of the support spring are higher than the middle section. This allows the sheet portions on the front and rear sides of the middle section to provide greater elastic force to the elastic contact arms. This improves the elastic deformation capability of the elastic contact arms at their corresponding positions on the middle section of the support spring, making them less prone to deformation. Consequently, after the press-fit part is inserted into the conductive hole of the printed circuit board, the holding force between the press-fit part and the printed circuit board is increased, and the fisheye terminal is less likely to loosen, thus improving the performance stability of the fisheye terminal. After the structural improvement, the holding force between the fisheye terminal and the printed circuit board is significantly increased, and the performance stability of the fisheye terminal is significantly improved.

[0016] The fisheye terminal of this utility model adopts the following technical solution:

[0017] A fisheye terminal includes a press-fit section for insertion into a conductive hole on a printed circuit board. The press-fit section includes two elastic contact arms arranged opposite each other. The elastic contact arms include a front guide section, a middle retaining section, and a rear support section along their length direction. The two elastic contact arms enclose a deformation space. The deformation space is provided with support springs spaced apart front and rear. Each support spring is connected to the elastic contact arms on both sides. In the width direction of the press-fit section, the two sides of each support spring are higher than the middle position and form a V shape so as to deform when compressed and provide elastic force to the elastic contact arms on both sides to expand outward. In the length direction of the press-fit section, the support spring in the middle extends parallel to the insertion direction, and the support springs at both ends extend obliquely from the end closer to the middle to the end farther from the middle, so that they provide a greater elastic force to the elastic contact arms than the support spring in the middle.

[0018] Furthermore, in the thickness direction of the press-fit section, the support springs at both ends extend obliquely toward the same side as the support spring in the middle.

[0019] Furthermore, there are deformation clearance holes between the support springs at both ends and the support spring in the middle. The two deformation clearance holes correspond to the transition connection between the front guide section and the middle holding section of the two elastic contact arms, and the transition connection between the tail support section and the middle holding section, respectively.

[0020] Furthermore, in the thickness direction of the press-fit section, the support springs at both ends and the support spring in the middle arch in opposite directions.

[0021] Furthermore, the angle of inclination of the supporting springs at both ends, extending from the end closer to the middle to the end farther from the middle, is 5° to 15°.

[0022] Furthermore, in the width direction of the press-fit section, the width of each support spring is 0.4 to 0.7 times the width of the press-fit section, and the included angle between the two sides of each support spring is 90° to 150°.

[0023] Furthermore, the thickness of each supporting spring is 0.1 to 0.35 times the thickness of the press-fit part.

[0024] Furthermore, in the thickness direction of the press-fit section, the cross-sections of the two elastic contact arms are hexagonal and adjacent sides are connected by arc segments. Each elastic contact arm has an inner surface, an outer contact surface for contacting the conductive holes of the printed circuit board, two sides in the thickness direction, and an inclined surface connecting the outer contact surface and the two sides in the thickness direction. The inner surface is connected to the support spring. The angle between the outer contact surface and the two inclined surfaces is 20° to 40°. The width of the outer contact surface is 1 / 3 to 2 / 3 of the thickness of the press-fit section. The arc segments connecting the outer contact surface and the two inclined surfaces, as well as the arc segments connecting the two sides in the thickness direction and the two inclined surfaces, are on the same circumference or inscribed in the same circle.

[0025] Furthermore, the middle retaining section of the two elastic contact arms is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit section.

[0026] Furthermore, the front ends of the two elastic contact arms are inclined inward and connected to form the front guide section, and the rear ends are inclined inward and connected to form the rear support section. The included angle of the front and rear inclined inward is 20° to 60°, and the included angle of the rear inclined inward is greater than the included angle of the front inclined inward, so that the rear support section of the two elastic contact arms has stronger resistance to deformation than the front guide section.

[0027] Beneficial Effects: This utility model fisheye terminal is an improved invention. By setting support springs spaced apart front and rear within the deformation space enclosed by two elastic contact arms, each support spring is connected to the elastic contact arms on both sides. In the width direction of the pressing part, the two sides of each support spring are positioned higher than the middle, forming a V-shape. When the elastic contact arms on both sides are pressed by the conductive holes of the printed circuit board, each support spring undergoes elastic deformation under pressure, thereby generating an outward elastic force on the elastic contact arms on both sides. The deformation of the support springs is concentrated at the root, and the generated elastic force acts entirely on the elastic contact arms on both sides, thus increasing the holding force between the elastic contact arms on both sides and the printed circuit board. In the length direction of the pressing part... The support spring at the center extends upwards, parallel to the insertion direction. The support springs at both ends extend at an angle from the end closer to the center to the end furthest from the center. This provides a greater elastic force to the elastic contact arms compared to the central support spring, resulting in better elastic deformation capability of the elastic contact arms at their positions corresponding to the central support spring. The elastic contact arms at both ends are less prone to deformation at their positions corresponding to the end support springs. This increases the holding force between the press-fit part and the printed circuit board after insertion into the conductive hole, and makes the fisheye terminal less prone to loosening, thus improving the performance stability of the fisheye terminal. After the structural improvement, the holding force between the fisheye terminal and the printed circuit board is significantly increased, and the performance stability of the fisheye terminal is significantly improved.

[0028] The contact element of this utility model adopts the following technical solution:

[0029] The contact element includes a connecting portion for connecting to a component and a fisheye terminal connected to the connecting portion. The fisheye terminal includes a press-fit portion for inserting into a conductive hole on a printed circuit board. The press-fit portion includes two opposing elastic contact arms. Each elastic contact arm includes a front guide section, a middle retaining section, and a rear support section along its length. The two elastic contact arms enclose a deformation space. A support spring is provided within the deformation space, and the support spring is connected to the elastic contact arms on both sides, thereby dividing the deformation space into fisheye grooves on both sides of the press-fit portion. The width of the press-fit portion... In the direction of the support spring, the two sides of the support spring are higher than the middle position and form a V shape so that it can deform when compressed and provide elastic force to the elastic contact arms on both sides to expand outward. In the length direction of the press-fit part, the middle section of the support spring extends parallel to the insertion direction. The sheet parts on the front and rear sides of the middle section of the support spring are inclined to transition with the middle section, so that the support spring has a groove-shaped structure with the front and rear ends higher than the middle section in the length direction. This allows the sheet parts on the front and rear sides of the middle section to provide greater elastic force to the elastic contact arms than the middle section.

[0030] Furthermore, the plate parts on the front and rear sides of the middle section of the supporting spring plate and the inclined transition points of the middle section correspond to the transition connection points of the front guide section and the middle holding section of the two elastic contact arms, and the transition connection points of the tail support section and the middle holding section, respectively.

[0031] Furthermore, the angle between the supporting sections of the spring sheet located on the front and rear sides of the middle section and the inclined transition point of the middle section is 5° to 15°.

[0032] Furthermore, in the width direction of the press-fit section, the width of the support spring is 0.4 to 0.7 times the width of the press-fit section, and the included angle between the two sides of the support spring is 90° to 150°.

[0033] Furthermore, the thickness of the support spring is 0.1 to 0.35 times the thickness of the press-fit part.

[0034] Furthermore, in the thickness direction of the press-fit section, the cross-sections of the two elastic contact arms are hexagonal and adjacent sides are connected by arc segments. Each elastic contact arm has an inner surface, an outer contact surface for contacting the conductive holes of the printed circuit board, two sides in the thickness direction, and an inclined surface connecting the outer contact surface and the two sides in the thickness direction. The inner surface is connected to the support spring. The angle between the outer contact surface and the two inclined surfaces is 20° to 40°. The width of the outer contact surface is 1 / 3 to 2 / 3 of the thickness of the press-fit section. The arc segments connecting the outer contact surface and the two inclined surfaces, as well as the arc segments connecting the two sides in the thickness direction and the two inclined surfaces, are on the same circumference or inscribed in the same circle.

[0035] Furthermore, the middle retaining section of the two elastic contact arms is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit section.

[0036] Furthermore, the front ends of the two elastic contact arms are inclined inward and connected to form the front guide section, and the rear ends are inclined inward and connected to form the rear support section. The included angle of the front and rear inclined inward is 20° to 60°, and the included angle of the rear inclined inward is greater than the included angle of the front inclined inward, so that the rear support section of the two elastic contact arms has stronger resistance to deformation than the front guide section.

[0037] Beneficial Effects: This utility model's contact element is an improved invention. By improving the structure of the fisheye terminal of the contact element, in the width direction of the pressing part, the two sides of the supporting spring are made higher than the middle position, forming a V shape. When the elastic contact arms on both sides are squeezed by the conductive holes of the printed circuit board, the supporting spring undergoes elastic deformation under pressure, thereby generating an outward elastic force on the elastic contact arms on both sides. The deformation of the supporting spring is concentrated at the root, and the generated elastic force acts entirely on the elastic contact arms on both sides, thus increasing the holding force between the elastic contact arms on both sides and the printed circuit board. In the length direction of the pressing part, the middle section of the supporting spring extends parallel to the insertion direction, and the sheet portions of the supporting spring located on both sides of the middle section... The design incorporates a sloped transition with the middle section, resulting in a groove-shaped structure where the front and rear ends of the support spring are higher than the middle section. This allows the sheet portions on the front and rear sides of the middle section to provide greater elastic force to the elastic contact arms. Consequently, the elastic contact arms at their corresponding positions on the middle section of the support spring exhibit better elastic deformation capabilities, and are less prone to deformation at these positions. This increases the holding force between the press-fit part and the printed circuit board (PCB) after insertion into the conductive hole, and makes the fisheye terminal less likely to loosen, thus improving its performance stability. The structural improvement significantly increases the holding force between the fisheye terminal and the PCB, resulting in significantly enhanced performance stability and greatly improved contact connection reliability.

[0038] Alternatively, the contact element of this utility model adopts the following technical solution:

[0039] The contact includes a connecting portion for connecting to a component and a fisheye terminal connected to the connecting portion. The fisheye terminal includes a press-fit portion for inserting into a conductive hole on a printed circuit board. The press-fit portion includes two elastic contact arms arranged opposite each other. The elastic contact arms include a front guide section, a middle holding section, and a rear support section along their length direction. The two elastic contact arms enclose a deformation space. The deformation space is provided with support springs spaced apart front and rear. Each support spring is connected to the elastic contact arms on both sides. In the width direction of the press-fit portion, the two sides of each support spring are higher than the middle position and form a V shape so that they deform when compressed and provide elastic force to the elastic contact arms on both sides to expand outward. In the length direction of the press-fit portion, the support spring in the middle extends parallel to the insertion direction, and the support springs at both ends extend obliquely from the end closer to the middle to the end farther from the middle, so that they provide a greater elastic force to the elastic contact arms than the support spring in the middle.

[0040] Furthermore, in the thickness direction of the press-fit section, the support springs at both ends extend obliquely toward the same side as the support spring in the middle.

[0041] Furthermore, there are deformation clearance holes between the support springs at both ends and the support spring in the middle. The two deformation clearance holes correspond to the transition connection between the front guide section and the middle holding section of the two elastic contact arms, and the transition connection between the tail support section and the middle holding section, respectively.

[0042] Furthermore, in the thickness direction of the press-fit section, the support springs at both ends and the support spring in the middle arch in opposite directions.

[0043] Furthermore, the angle of inclination of the supporting springs at both ends, extending from the end closer to the middle to the end farther from the middle, is 5° to 15°.

[0044] Furthermore, in the width direction of the press-fit section, the width of each support spring is 0.4 to 0.7 times the width of the press-fit section, and the included angle between the two sides of each support spring is 90° to 150°.

[0045] Furthermore, the thickness of each supporting spring is 0.1 to 0.35 times the thickness of the press-fit part.

[0046] Furthermore, in the thickness direction of the press-fit section, the cross-sections of the two elastic contact arms are hexagonal and adjacent sides are connected by arc segments. Each elastic contact arm has an inner surface, an outer contact surface for contacting the conductive holes of the printed circuit board, two sides in the thickness direction, and an inclined surface connecting the outer contact surface and the two sides in the thickness direction. The inner surface is connected to the support spring. The angle between the outer contact surface and the two inclined surfaces is 20° to 40°. The width of the outer contact surface is 1 / 3 to 2 / 3 of the thickness of the press-fit section. The arc segments connecting the outer contact surface and the two inclined surfaces, as well as the arc segments connecting the two sides in the thickness direction and the two inclined surfaces, are on the same circumference or inscribed in the same circle.

[0047] Furthermore, the middle retaining section of the two elastic contact arms is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit section.

[0048] Furthermore, the front ends of the two elastic contact arms are inclined inward and connected to form the front guide section, and the rear ends are inclined inward and connected to form the rear support section. The included angle of the front and rear inclined inward is 20° to 60°, and the included angle of the rear inclined inward is greater than the included angle of the front inclined inward, so that the rear support section of the two elastic contact arms has stronger resistance to deformation than the front guide section.

[0049] Beneficial Effects: This utility model's contact element is an improved invention. By improving the structure of the fisheye terminal of the contact element, support springs spaced at intervals are arranged within the deformation space enclosed by the two elastic contact arms of the fisheye terminal. Each support spring is connected to the elastic contact arms on both sides. In the width direction of the pressing part, the two sides of each support spring are positioned higher than the middle, forming a V-shape. Thus, when the elastic contact arms on both sides are pressed by the conductive holes of the printed circuit board, each support spring undergoes elastic deformation under pressure, thereby generating an outward elastic force on the elastic contact arms on both sides. The deformation of the support springs is concentrated at the root, and the generated elastic force acts entirely on the elastic contact arms on both sides, thereby increasing the adhesion between the elastic contact arms on both sides and the printed circuit board. Holding force: Along the length of the press-fit section, the supporting spring in the middle extends parallel to the insertion direction, while the supporting springs at both ends extend obliquely from the end closer to the middle to the end farther from the middle. This provides a greater elastic force to the elastic contact arms compared to the supporting spring in the middle, resulting in better elastic deformation capability of the elastic contact arms at the positions corresponding to the supporting springs in the middle. The elastic contact arms at the positions corresponding to the supporting springs at both ends are less prone to deformation. This increases the holding force between the press-fit section and the printed circuit board after insertion into the conductive hole, and makes the fisheye terminal less prone to loosening, thereby improving the performance stability of the fisheye terminal. After the structural improvement, the holding force between the fisheye terminal and the printed circuit board is significantly increased, and the performance stability of the fisheye terminal is significantly improved, thus greatly improving the reliability of the contact connection.

[0050] The connector of this utility model adopts the following technical solution:

[0051] A connector includes a contact element, which includes a connecting portion for connecting to a component and a fisheye terminal for connecting to the connecting portion. The fisheye terminal includes a crimping portion for insertion into a conductive hole on a printed circuit board. The crimping portion includes two opposing elastic contact arms. Each elastic contact arm includes a front guide section, a middle retaining section, and a rear support section along its length. The two elastic contact arms enclose a deformation space, within which a support spring is provided. The support spring is connected to the elastic contact arms on both sides, thereby dividing the deformation space into fisheye grooves on both sides of the crimping portion. In the width direction of the fitting, the two sides of the support spring are higher than the middle position and form a V shape so that it can deform when compressed and provide elastic force to the elastic contact arms on both sides to expand outward. In the length direction of the pressing fitting, the middle section of the support spring extends parallel to the insertion direction. The sheet parts on the front and rear sides of the middle section of the support spring are inclined to transition with the middle section, so that the support spring has a groove-shaped structure in the length direction with the front and rear ends higher than the middle section, so that the sheet parts on the front and rear sides of the middle section provide greater elastic force to the elastic contact arms than the middle section.

[0052] Furthermore, the plate parts on the front and rear sides of the middle section of the supporting spring plate and the inclined transition points of the middle section correspond to the transition connection points of the front guide section and the middle holding section of the two elastic contact arms, and the transition connection points of the tail support section and the middle holding section, respectively.

[0053] Furthermore, the angle between the supporting sections of the spring sheet located on the front and rear sides of the middle section and the inclined transition point of the middle section is 5° to 15°.

[0054] Furthermore, in the width direction of the press-fit section, the width of the support spring is 0.4 to 0.7 times the width of the press-fit section, and the included angle between the two sides of the support spring is 90° to 150°.

[0055] Furthermore, the thickness of the support spring is 0.1 to 0.35 times the thickness of the press-fit part.

[0056] Furthermore, in the thickness direction of the press-fit section, the cross-sections of the two elastic contact arms are hexagonal and adjacent sides are connected by arc segments. Each elastic contact arm has an inner surface, an outer contact surface for contacting the conductive holes of the printed circuit board, two sides in the thickness direction, and an inclined surface connecting the outer contact surface and the two sides in the thickness direction. The inner surface is connected to the support spring. The angle between the outer contact surface and the two inclined surfaces is 20° to 40°. The width of the outer contact surface is 1 / 3 to 2 / 3 of the thickness of the press-fit section. The arc segments connecting the outer contact surface and the two inclined surfaces, as well as the arc segments connecting the two sides in the thickness direction and the two inclined surfaces, are on the same circumference or inscribed in the same circle.

[0057] Furthermore, the middle retaining section of the two elastic contact arms is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit section.

[0058] Furthermore, the front ends of the two elastic contact arms are inclined inward and connected to form the front guide section, and the rear ends are inclined inward and connected to form the rear support section. The included angle of the front and rear inclined inward is 20° to 60°, and the included angle of the rear inclined inward is greater than the included angle of the front inclined inward, so that the rear support section of the two elastic contact arms has stronger resistance to deformation than the front guide section.

[0059] Beneficial Effects: This utility model connector is an improved invention. By improving the structure of the fisheye terminal of the contact element, in the width direction of the pressing part, the two sides of the support spring are made higher than the middle position, forming a V shape. When the elastic contact arms on both sides are squeezed by the conductive holes of the printed circuit board, the support spring undergoes elastic deformation under pressure, thereby generating an outward elastic force on the elastic contact arms on both sides. The deformation of the support spring is concentrated at the root, and the generated elastic force acts entirely on the elastic contact arms on both sides, thus increasing the holding force between the elastic contact arms on both sides and the printed circuit board. In the length direction of the pressing part, the middle section of the support spring extends parallel to the insertion direction, and the sheet portions of the support spring located on both sides of the middle section... The design incorporates a sloping transition with the middle section, resulting in a groove-shaped structure where the front and rear ends of the support spring are higher than the middle section. This allows the sheet portions on either side of the middle section to provide greater elastic force to the elastic contact arms, improving the elastic deformation capability of the elastic contact arms at their corresponding positions within the middle section of the support spring. Furthermore, the sheet portions on either side of the middle section are less prone to deformation, thus increasing the holding force between the press-fit part and the printed circuit board (PCB) after insertion into the conductive hole. This also makes the fisheye terminal less prone to loosening, thereby improving its performance stability. The structural improvement significantly increases the holding force between the fisheye terminal and the PCB, resulting in significantly enhanced performance stability and greatly improved contact connection reliability and connector performance stability.

[0060] Alternatively, the connector of this utility model adopts the following technical solution:

[0061] A connector includes a contact element, the contact element including a connecting portion for connecting to a component and a fisheye terminal connected to the connecting portion. The fisheye terminal includes a crimping portion for inserting into a conductive hole on a printed circuit board. The crimping portion includes two opposing elastic contact arms. The elastic contact arms include a front guide section, a middle retaining section, and a rear support section along their length direction. The two elastic contact arms enclose a deformation space. The deformation space is provided with support springs spaced apart front and rear. Each support spring is connected to the elastic contact arms on both sides. In the width direction of the crimping portion, the two sides of each support spring are higher than the middle position and form a V shape so as to deform under compression and provide elastic force to the elastic contact arms on both sides to expand outward. In the length direction of the crimping portion, the support spring in the middle extends parallel to the insertion direction, and the support springs at both ends extend obliquely from the end closer to the middle to the end farther from the middle, so that they provide a greater elastic force to the elastic contact arms than the support spring in the middle.

[0062] Furthermore, in the thickness direction of the press-fit section, the support springs at both ends extend obliquely toward the same side as the support spring in the middle.

[0063] Furthermore, there are deformation clearance holes between the support springs at both ends and the support spring in the middle. The two deformation clearance holes correspond to the transition connection between the front guide section and the middle holding section of the two elastic contact arms, and the transition connection between the tail support section and the middle holding section, respectively.

[0064] Furthermore, in the thickness direction of the press-fit section, the support springs at both ends and the support spring in the middle arch in opposite directions.

[0065] Furthermore, the angle of inclination of the supporting springs at both ends, extending from the end closer to the middle to the end farther from the middle, is 5° to 15°.

[0066] Furthermore, in the width direction of the press-fit section, the width of each support spring is 0.4 to 0.7 times the width of the press-fit section, and the included angle between the two sides of each support spring is 90° to 150°.

[0067] Furthermore, the thickness of each supporting spring is 0.1 to 0.35 times the thickness of the press-fit part.

[0068] Furthermore, in the thickness direction of the press-fit section, the cross-sections of the two elastic contact arms are hexagonal and adjacent sides are connected by arc segments. Each elastic contact arm has an inner surface, an outer contact surface for contacting the conductive holes of the printed circuit board, two sides in the thickness direction, and an inclined surface connecting the outer contact surface and the two sides in the thickness direction. The inner surface is connected to the support spring. The angle between the outer contact surface and the two inclined surfaces is 20° to 40°. The width of the outer contact surface is 1 / 3 to 2 / 3 of the thickness of the press-fit section. The arc segments connecting the outer contact surface and the two inclined surfaces, as well as the arc segments connecting the two sides in the thickness direction and the two inclined surfaces, are on the same circumference or inscribed in the same circle.

[0069] Furthermore, the middle retaining section of the two elastic contact arms is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit section.

[0070] Furthermore, the front ends of the two elastic contact arms are inclined inward and connected to form the front guide section, and the rear ends are inclined inward and connected to form the rear support section. The included angle of the front and rear inclined inward is 20° to 60°, and the included angle of the rear inclined inward is greater than the included angle of the front inclined inward, so that the rear support section of the two elastic contact arms has stronger resistance to deformation than the front guide section.

[0071] Beneficial Effects: This utility model connector is an improved invention. By improving the structure of the fisheye terminal of the contact element, support springs spaced at intervals are set within the deformation space enclosed by the two elastic contact arms of the fisheye terminal. Each support spring is connected to the elastic contact arms on both sides. In the width direction of the pressing part, the two sides of each support spring are made higher than the middle position, forming a V shape. In this way, when the elastic contact arms on both sides are squeezed by the conductive holes of the printed circuit board, each support spring undergoes elastic deformation under pressure, thereby generating an outward elastic force on the elastic contact arms on both sides. The deformation of the support springs is concentrated at the root, and the generated elastic force acts entirely on the elastic contact arms on both sides, thereby increasing the protection between the elastic contact arms on both sides and the printed circuit board. Holding force: Along the length of the press-fit section, the supporting spring in the middle extends parallel to the insertion direction, while the supporting springs at both ends extend obliquely from the end closer to the middle to the end farther from the middle. This provides a greater elastic force to the elastic contact arms compared to the supporting spring in the middle, resulting in better elastic deformation capability of the elastic contact arms at the positions corresponding to the supporting springs in the middle. The elastic contact arms at the positions corresponding to the supporting springs at both ends are less prone to deformation. This increases the holding force between the press-fit section and the printed circuit board after insertion into the conductive hole, and makes the fisheye terminal less prone to loosening, thereby improving the performance stability of the fisheye terminal. After the structural improvement, the holding force between the fisheye terminal and the printed circuit board is significantly increased, and the performance stability of the fisheye terminal is significantly improved, thus greatly improving the reliability of the contact connection and the overall performance stability of the connector. Attached Figure Description

[0072] Figure 1 This is a perspective view of Embodiment 1 of the contact element of this utility model;

[0073] Figure 2 for Figure 1 Enlarged schematic diagram of the fisheye terminal;

[0074] Figure 3 This is a front view of Embodiment 1 of the contact element of this utility model;

[0075] Figure 4 for Figure 3 Enlarged schematic diagram of the fisheye terminal;

[0076] Figure 5 for Figure 1 A top view of the crimping portion of the fisheye terminal, cut transversely along the thickness direction of the terminal;

[0077] Figure 6 for Figure 1 A cross-sectional schematic diagram showing the connection between the elastic contact arms on both sides of the intermediate pressure assembly and the supporting spring sheet;

[0078] Figure 7 for Figure 1Enlarged schematic diagram of the fisheye terminal from another perspective;

[0079] Figure 8 for Figure 7 Sectional view at point AA;

[0080] Figure 9 This is a schematic diagram of the structure of embodiment 2 of the contact element of this utility model;

[0081] In the figure: 1. Connecting part; 2. Press-fitting part; 3. Elastic contact arm; 3-1. Front guide section; 3-2. Middle holding section; 3-3. Tail support section; 3-4. Inner side; 3-5. Outer contact surface; 3-6. Inclined surface; 3-7. Arc section; 4. Support spring; 4-1. Middle section; 5. Deformation clearance hole. Detailed Implementation

[0082] This invention improves upon the existing fisheye terminal structure, primarily by redesigning the support spring of the press-fit section. In the width direction of the press-fit section, the two sides of the support spring are positioned higher than the middle, forming a V-shape. When compressed, the support spring deforms, providing an elastic force to the elastic contact arms on both sides to expand outwards. In the length direction of the press-fit section, the support spring has a groove-shaped structure with both ends higher than the middle section. This improves the elastic deformation capability of the elastic contact arms at the middle section of the support spring, making it less prone to deformation at the points on either side of the middle section. This increases the holding force between the press-fit section and the printed circuit board after insertion into the conductive hole, and makes the fisheye terminal less likely to loosen, thereby improving the performance stability of the fisheye terminal.

[0083] Based on the above inventive concept, the features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0084] Embodiment 1 of the contact element of this utility model:

[0085] like Figure 1 As shown, the contact includes a connecting part 1 and a fisheye terminal connected to the connecting part 1. The fisheye terminal includes a crimping part 2. The contact is inserted into a conductive hole in the printed circuit board through the crimping part 2 to connect with the printed circuit board, and is connected to other components through the connecting part 1. The overall extension direction of the contact, i.e., its length direction, is parallel to the insertion direction of the crimping part 2. In this embodiment, the connecting part 1 is a pin structure that can be inserted into a socket or other components to achieve connection. In other embodiments, the connecting part 1 can also be a solder part, connecting to other components through soldering. Through the above methods, it serves to conduct signals or transmit power, connecting the entire circuit.

[0086] The improvement of the contact element in this utility model is concentrated on the fisheye terminal. The structure of the fisheye terminal will be described in detail below.

[0087] like Figure 2-4 As shown, the crimping part 2 of the fisheye terminal extends along the insertion direction and gradually narrows at both ends. The crimping part 2 includes two elastic contact arms 3 arranged opposite each other on the left and right and a support spring 4 connected between the two elastic contact arms 3. The left and right direction is the width direction of the crimping part 2. The two elastic contact arms 3 extend along the insertion direction of the crimping part 2. The front ends of the two elastic contact arms 3 are connected and the tail ends are connected so that the two elastic contact arms 3 enclose a deformation space. The support spring 4 is provided in the deformation space. The support spring 4 is connected to the elastic contact arms 3 on both sides, thereby dividing the deformation space into fisheye grooves on the front and back sides of the crimping part 2. The two elastic contact arms 3 include a front guide section 3-1, a middle retaining section 3-2, and a rear support section 3-3 along their length. Adjacent sections are connected by an arc. The middle retaining section 3-2 is a straight section parallel to the insertion direction. The front guide section 3-1 and the rear support section 3-3 extend inwards relative to the middle retaining section 3-2. The front ends of the two elastic contact arms 3 are inclined inwards and connected to form the front guide section 3-1, and the rear ends of the two elastic contact arms 3 are inclined inwards and connected to form the rear support section 3-3. The front guide section 3-1 guides the terminal insertion into the conductive hole of the printed circuit board. The middle retaining section 3-2 provides an interference fit with the conductive hole of the printed circuit board, providing retaining force. The rear support section 3-3 provides support. The connecting part 1 is connected to the rear support section 3-3.

[0088] like Figure 2-4 As shown, the support spring 4 extends along the insertion direction and has a certain elastic deformation capability. When the elastic contact arms 3 on both sides are squeezed by the conductive holes of the printed circuit board, the support spring 4 is deformed under pressure, generating an outward elastic force on the elastic contact arms 3. Specifically, as... Figure 5-6 As shown, in the width direction of the press-fit section 2, the two sides of the support spring 4 are higher than the middle position and form a V shape. The two sides of the support spring 4 are connected to the middle position in the thickness direction of the elastic contact arms 3 on both sides. When the support spring 4 is compressed, it deforms and provides an elastic force to the elastic contact arms 3 on both sides to expand outward. Figure 7-8As shown, along the length of the press-fit section 2, the support spring 4 is divided into three sections. The middle section 4-1 of the support spring 4 extends parallel to the insertion direction. The front and rear sections of the support spring 4, i.e., the plate parts on the front and rear sides of the middle section 4-1, are inclined to transition to the middle section 4-1 and are respectively connected to the front guide section 3-1 and the rear support section 3-3 of the elastic contact arms 3 on both sides. This makes the support spring 4 have a groove-shaped structure in the length direction, with both the front and rear ends higher than the middle section 4-1. This design makes the plates on the front and rear sides of the middle section 4-1 have a groove-shaped structure. Compared to the middle section 4-1, the sheet portion can provide greater elastic force to the elastic contact arm 3, making the elastic contact arms 3 on both sides have better elastic deformation ability at the position corresponding to the middle section 4-1 of the support spring 4. The sheet portion corresponding to the support spring 4 at the front and rear sides of the middle section 4-1 is less prone to deformation. This increases the holding force between the press-fit part 2 and the printed circuit board after the press-fit part 2 is inserted into the conductive hole of the printed circuit board, and makes the fisheye terminal less prone to loosening, thereby improving the performance stability of the fisheye terminal.

[0089] like Figure 7-8 As shown, the front section of the support spring 4, i.e., the sheet portion in front of the middle section 4-1, transitions at an angle to the middle section 4-1, corresponding to the transition connection between the front guide section 3-1 and the middle retaining section 3-2 of the two elastic contact arms 3. The rear section of the support spring 4, i.e., the sheet portion in front of the middle section 4-1, transitions at an angle to the middle section 4-1, corresponding to the transition connection between the rear support section 3-3 and the middle retaining section 3-2 of the two elastic contact arms 3. After insertion into the conductive hole of the printed circuit board, the two elastic contact arms 3 mainly provide retaining force through the interference fit between the middle retaining section 3-2 and the conductive hole of the printed circuit board. This design further enables the middle retaining section 3-2 of the two elastic contact arms 3 to have the largest possible retaining force, while making the front guide section 3-1 and the rear support section 3-3 less prone to deformation relative to the middle retaining section 3-2. This results in better anti-loosening effect after the terminal is inserted into the printed circuit board, further improving the performance stability of the fisheye terminal.

[0090] like Figure 8 As shown, the angles α6 and α7 between the sheet portion of the supporting spring 4 located on both sides of the middle section 4-1 and the inclined transition point of the middle section 4-1 can be 5°, 10°, 15°, etc., preferably 5° to 15°. This angle range can ensure that the front guide section 3-1 and the rear support section 3-3 of the two elastic contact arms 3 are less prone to deformation relative to the middle holding section 3-2, and at the same time ensure that the insertion force is not too large and damages the printed circuit board when the terminal is inserted into the conductive hole of the printed circuit board.

[0091] like Figure 6As shown, in the width direction of the press-fit part 2, the width of the support spring 4 can be 0.4, 0.5, 0.6, or 0.7 times the width of the press-fit part 2, preferably 0.4 to 0.7 times the width of the press-fit part 2. The width of the press-fit part 2 is the distance between the outer contact surfaces 3-5 of the two elastic contact arms 3. The included angle α3 of the two sides of the support spring 4 can be 90°, 120°, 150°, etc., preferably 90° to 150°. By limiting the width of the support spring 4 and the range of the included angle of the two sides, making the included angle of the two sides of the support spring 4 an obtuse angle, it can be ensured that the support spring 4 has a large elastic deformation capacity, and can provide greater elastic support force for the elastic contact arms 3 on both sides after being deformed by pressure. The thickness of the support spring 4 can be 0.1 times, 0.2 times, or 0.35 times the thickness of the press-fit part 2, preferably 0.1 to 0.35 times the thickness of the press-fit part 2. This thickness range can ensure that the support spring 4 has sufficient elastic deformation capacity, while avoiding the support spring 4 being too thick, which would make it difficult to deform under pressure, and cause excessive insertion force that would damage the printed circuit board.

[0092] like Figure 6As shown, in the thickness direction of the press-fit part 2, the cross-sections of the two elastic contact arms 3 are hexagonal (the inner side 3-4 of the elastic contact arm 3, i.e. the side connected to the support spring 4, is regarded as one side), and the adjacent two sides are connected by a circular arc segment 3-7. Both elastic contact arms 3 have an inner surface 3-4, an outer contact surface 3-5 for contacting the conductive holes of the printed circuit board, two sides in the thickness direction, and an inclined surface 3-6 connecting the outer contact surface 3-5 and the two sides in the thickness direction. The inner surface 3-4 of the two elastic contact arms 3 is connected to the support spring 4. The outer contact surface 3-5 of the two elastic contact arms 3 is a plane. The two opposite sides in the thickness direction of the two elastic contact arms 3 are planes. The included angles α1 and α2 between the outer contact surface 3-5 and the two adjacent inclined surfaces 3-6 are equal and can be 20°, 30°, 40°, etc., preferably 20° to 40°. The width of the outer contact surface 3-5 can be 1 / 3, 1 / 2, or 2 / 3 of the thickness of the press-fit part 2, preferably 1 / 3 to 2 / 3 of the thickness of the press-fit part 2. The arc segment 3-7 that transitions between the outer contact surface 3-5 and the two adjacent inclined surfaces 3-6, as well as the arc segment 3-7 that transitions between the two sides in the thickness direction and the adjacent inclined surfaces 3-6, are on the same circumference. In this way, each elastic contact arm 3 has four arc segments 3-7 that contact the conductive holes on the printed circuit board, which helps to disperse the elastic force and avoid concentrated insertion force that could damage the printed circuit board. Furthermore, in another embodiment, the arc segments 3-7 that transition between the outer contact surface 3-5 and the adjacent two inclined surfaces 3-6, as well as the arc segments 3-7 that transition between the two sides in the thickness direction and the adjacent inclined surfaces 3-6, can be internally tangent to the same circle. The diameter of this circle is slightly larger than the diameter of the conductive holes on the printed circuit board. When the fisheye terminal is inserted into the conductive holes on the printed circuit board, the two elastic contact arms 3 are deformed under pressure, and each elastic contact arm 3 forms multiple contacts with the conductive holes on the printed circuit board, which also disperses the elastic force and avoids concentrated insertion force that could damage the printed circuit board. Figure 7As shown, the middle retaining section 3-2 of the two elastic contact arms 3 is a straight section parallel to the insertion direction. The length L1 of the straight section can be 0.1, 0.3, or 0.5 times the length L of the press-fit part 2, preferably 0.1 to 0.5 times the length L of the press-fit part 2. This length range can ensure that the two elastic contact arms 3 have a suitable interference fit length with the conductive hole of the printed circuit board, thereby ensuring a large holding force between the two elastic contact arms 3 and the printed circuit board, while ensuring that the fisheye terminal will not be skewed after being inserted into the printed circuit board, ensuring the product's alignment, and thus ensuring product performance. The front ends of two elastic contact arms 3 are inclined inward and connected to form a front guide section 3-1. The included angle α4 of the inward inclination of the front ends of the two elastic contact arms 3 can be 20°, 30°, 40°, 50°, 60°, etc., preferably 20° to 60°. If the included angle of the inward inclination of the front ends is too small, the front guide section 3-1 of the two elastic contact arms 3 will extend too long, resulting in inconvenience in assembly. Moreover, after the pressing part 2 is inserted into the conductive hole of the printed circuit board, the front guide section 3-1 of the elastic contact arm 3 will extend too far out of the conductive hole of the printed circuit board, which is easy to cause interference with surrounding components. If the included angle of the inward inclination of the front ends is too large, the front guide section 3-1 of the two elastic contact arms 3 will extend too short, affecting the guiding effect when inserting the terminal. The included angle α4 of the inward inclination of the front ends of the two elastic contact arms 3 is preferably 20° to 60°, which ensures a good guiding effect and avoids the problem of inconvenience in assembly and interference with surrounding components caused by the excessive extension of the front guide section 3-1 of the elastic contact arms 3.

[0093] The tail ends of two elastic contact arms 3 are inclined inward and connected to form a tail end support section 3-3. The included angle α5 of the tail ends of the two elastic contact arms 3 can be 20°, 30°, 40°, 50°, 60°, etc., preferably 20° to 60°. If the included angle α5 of the tail ends is too small, it will not only cause the tail end support section 3-3 to be too long, making the overall size of the terminal too large, but it will also cause the tail end support section 3-3 to be easily deformed, reducing the support stability. If the included angle α5 of the tail ends is too large, it will be unfavorable for the deformation of the tail end support section 3-3, thus easily causing excessive deformation of the printed circuit board. The tail end support section 3-3 is used to provide support. Therefore, preferably, the included angle α5 of the tail ends of the two elastic contact arms 3 is greater than the included angle α4 of the front end, so that the tail end support section 3-3 has higher structural strength, stronger resistance to deformation, and improved support reliability compared with the front guide section 3-1. Of course, in another embodiment, the inward tilt angle α5 of the tail ends of the two elastic contact arms 3 can also be equal to the inward tilt angle α4 of the front ends.

[0094] After the fisheye terminal of the contact of this utility model is inserted into the conductive hole of the printed circuit board, it can significantly increase the holding force between the pressing part 2 and the printed circuit board, and make the fisheye terminal less likely to loosen. The performance stability of the fisheye terminal is significantly improved, thereby greatly improving the reliability of the contact connection.

[0095] In addition, it is understood that the above embodiments only provide a preferred range of dimensions for each part of the press-fit section 2, but do not strictly limit these ranges. In practical applications, it is also feasible for the dimensions of some parts of the structure to be outside the preferred range.

[0096] Of course, the contact element of this utility model is not limited to the embodiments described above.

[0097] For example, in another embodiment, the section of the supporting spring 4 located in front of the middle section 4-1 and the inclined transition point of the middle section 4-1 can also be located in front of or behind the transition connection point between the front guide section 3-1 and the middle retaining section 3-2 of the two elastic contact arms 3; similarly, the section of the supporting spring 4 located behind the middle section 4-1 and the inclined transition point of the middle section 4-1 can also be located in front of or behind the transition connection point between the rear support section 3-3 and the middle retaining section 3-2 of the two elastic contact arms 3.

[0098] For example, in another embodiment, the two elastic contact arms 3 of the press-fit part 2 can also adopt the existing structure. The cross-section of the two elastic contact arms 3 in the thickness direction can be rectangular, and the adjacent sides are transitioned by arc segments 3-7.

[0099] Embodiment 2 of the contact element of this utility model:

[0100] like Figure 9 As shown, the contact includes a connecting part 1 and a fisheye terminal connected to the connecting part 1. The fisheye terminal includes a crimping part 2. The contact is inserted into a conductive hole in the printed circuit board through the crimping part 2 to connect with the printed circuit board, and is connected to other components through the connecting part 1. The overall extension direction of the contact, i.e., its length direction, is parallel to the insertion direction of the crimping part 2. In this embodiment, the connecting part 1 is a pin structure that can be inserted into a socket or other components to achieve connection. In other embodiments, the connecting part 1 can also be changed to a soldering part, connecting to other components through soldering. Through the above methods, it serves to conduct signals or transmit power, connecting the entire circuit.

[0101] The insertion direction of the crimping part 2 is defined as the front-to-back direction, the width direction as the left-to-right direction, and the thickness direction as the up-to-down direction. The crimping part 2 of the fisheye terminal extends entirely along the insertion direction, gradually narrowing at both ends. The crimping part 2 includes two elastic contact arms 3 arranged opposite each other on the left and right sides. The two elastic contact arms 3 extend along the insertion direction of the crimping part 2, and their front ends and rear ends are connected, so that the two elastic contact arms 3 enclose a variable space. The structure of the two elastic contact arms 3 is the same as that in Embodiment 1 above, and will not be repeated here.

[0102] The main difference between this embodiment and Embodiment 1 is that the elastic structure provided within the deformation space enclosed by the two elastic contact arms 3 is different. In this embodiment, three support spring pieces 4 are provided at intervals in front and behind within the deformation space enclosed by the two elastic contact arms 3, and each support spring piece 4 is connected to the elastic contact arms 3 on both sides. In the width direction of the pressing part 2, the two sides of each support spring piece 4 are higher than the middle position and form a V shape. The two sides of the support spring piece 4 are connected to the middle position in the thickness direction of the elastic contact arms 3 on both sides. When compressed, the support spring piece 4 deforms and provides an elastic force to the elastic contact arms 3 on both sides to expand outward. Along the length of the press-fit section 2, the support spring 4 in the middle extends parallel to the insertion direction, and the support springs 4 at both ends extend obliquely from the end closer to the middle to the end farther from the middle. This design allows the support springs 4 at both ends to provide greater elastic force to the elastic contact arms 3 than the support spring 4 in the middle, making the elastic contact arms 3 on both sides have better elastic deformation ability at the positions corresponding to the support spring 4 in the middle, and less prone to deformation at the positions corresponding to the support springs 4 at both ends. This increases the holding force between the press-fit section 2 and the printed circuit board after the press-fit section 2 is inserted into the conductive hole of the printed circuit board, and makes the fisheye terminal less prone to loosening, thereby improving the performance stability of the fisheye terminal.

[0103] Deformation clearance holes 5 are provided between the support springs 4 at both ends and the support spring 4 in the middle. The two deformation clearance holes 5 correspond to the transition connection between the front guide section 3-1 and the middle holding section 3-2 of the two elastic contact arms 3, and the transition connection between the tail support section 3-3 and the middle holding section 3-2, respectively. After insertion into the conductive hole of the printed circuit board, the two elastic contact arms 3 mainly provide holding force through the interference fit between the middle holding section 3-2 and the conductive hole of the printed circuit board. This design enables the middle holding section 3-2 of the two elastic contact arms 3 to have the largest possible holding force, while making the front guide section 3-1 and the tail support section 3-3 less prone to deformation than the middle holding section 3-2. The anti-loosening effect after the terminal is inserted into the printed circuit board is better, further improving the performance stability of the fisheye terminal.

[0104] In the thickness direction of the press-fit section 2, the support springs 4 at both ends extend inclined towards the same side of the support spring 4 in the middle, which helps to improve the elastic deformation capability of the elastic contact arms 3 on both sides. Preferably, in the thickness direction of the press-fit section 2, the support springs 4 at both ends and the support spring 4 in the middle arch in opposite directions. Define the thickness direction of the press-fit section 2 as the vertical direction. The support spring 4 in the middle arches backward with its V-shaped groove facing forward, while the support springs 4 at both ends arch forward with their V-shaped grooves facing backward. Since the grooves of the support springs 4 are more prone to deformation, this design can effectively suppress the tilting deformation of the elastic contact arms 3 on both sides, making the deformation of the elastic contact arms 3 on both sides more uniform. After insertion into the conductive holes of the printed circuit board, it is more conducive to maintaining the parallelism of the elastic contact arms 3 on both sides, thereby balancing the deformation of each contact point of the conductive holes of the printed circuit board.

[0105] The inclined angle of the support springs 4 at both ends extending from the end closer to the middle to the end farther from the middle can be 5°, 10°, 15°, etc., preferably 5° to 15°. This angle range can ensure that the front guide section 3-1 and the rear support section 3-3 of the two elastic contact arms 3 are less likely to deform than the middle holding section 3-2, and at the same time ensure that the insertion force is not too large and will damage the printed circuit board when the terminal is inserted into the conductive hole of the printed circuit board.

[0106] In the width direction of the pressing part 2, the width of each support spring 4 can be 0.4, 0.5, 0.6, or 0.7 times the width of the pressing part 2, preferably 0.4 to 0.7 times the width of the pressing part 2. The included angle between the two sides of each support spring 4 can be 90°, 120°, or 150°, preferably 90° to 150°. By limiting the width and the included angle range of the two sides of the support spring 4, making the included angle between the two sides of each support spring 4 an obtuse angle, it can be ensured that each support spring 4 has a large elastic deformation capacity, and can provide greater elastic support force for the elastic contact arms 3 on both sides after being deformed under pressure. The thickness of each support spring 4 can be 0.1, 0.2, or 0.35 times the thickness of the pressing part 2, preferably 0.1 to 0.35 times the thickness of the pressing part 2. This thickness range can ensure that the support spring 4 has sufficient elastic deformation capacity, and avoid the support spring 4 being too thick, which would make it difficult to deform under pressure, and cause excessive insertion force that would damage the printed circuit board. The thickness of each support spring 4 is preferably 0.1 to 0.35 times the thickness of the press-fit part 2. This thickness range can ensure that the support spring 4 has sufficient elastic deformation capacity, and avoid the support spring 4 being too thick, which would make it difficult to deform under pressure, and cause the insertion force to be too large and damage the printed circuit board.

[0107] The other structures of the contact element in this embodiment are the same as those in Embodiment 1 above, and will not be described again here.

[0108] In addition, it is understood that the above embodiments only provide a preferred range of dimensions for each part of the press-fit section 2, but do not strictly limit these ranges. In practical applications, it is also feasible for the dimensions of some parts of the structure to be outside the preferred range.

[0109] In other embodiments of this example, in the thickness direction of the press-fit part 2, the front end support spring 4 may extend obliquely toward one side of the middle support spring 4, and the rear end support spring 4 may extend obliquely toward the opposite side of the middle support spring 4.

[0110] In other embodiments, the positions of the two deformation avoidance holes 5 may also be slightly forward or backward. For example, the forward deformation avoidance hole 5 is located in front of the transition connection between the front guide section 3-1 and the middle retaining section 3-2 of the two elastic contact arms 3, and the backward deformation avoidance hole 5 is located in rear of the transition connection between the tail support section 3-3 and the middle retaining section 3-2 of the two elastic contact arms 3.

[0111] In other embodiments, in the thickness direction of the press-fit part 2, the support springs 4 at both ends and the support spring 4 in the middle can arch towards the same side, for example, the V-shaped grooves of each support spring 4 face forward or backward.

[0112] This utility model also provides an embodiment of a fisheye terminal, the specific structure of which is the same as the structure of the fisheye terminal in the various embodiments of the connector described above, and will not be described again here.

[0113] This utility model also provides an embodiment of a connector, which includes a contact and other components connected to the contact. The specific structure of the contact has been described in detail in the above embodiments of the contact, and will not be repeated here.

[0114] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A fisheye terminal, comprising a press-fit portion (2) for insertion into a conductive hole of a printed circuit board, the press-fit portion (2) comprising two elastic contact arms (3) arranged opposite to each other, the elastic contact arms (3) comprising a front guide section (3-1), a middle retaining section (3-2) and a rear support section (3-3) along their length direction, the two elastic contact arms (3) enclosing a deformation space, a support spring (4) provided in the deformation space, the support spring (4) being connected to the elastic contact arms (3) on both sides to divide the deformation space into fisheye grooves on both sides of the press-fit portion (2), characterized in that: In the width direction of the press-fit part (2), the two sides of the support spring (4) are higher than the middle position and form a V shape so that it deforms when squeezed and provides elastic force to the elastic contact arms (3) on both sides to expand outward. In the length direction of the press-fit part (2), the middle section (4-1) of the support spring (4) extends parallel to the insertion direction. The sheet parts of the support spring (4) on the front and rear sides of the middle section (4-1) are inclined to the middle section (4-1), so that the support spring (4) has a groove-shaped structure in the length direction with the front and rear ends higher than the middle section (4-1), so that the sheet parts on the front and rear sides of the middle section (4-1) provide a greater elastic force to the elastic contact arms (3) than the middle section (4-1).

2. The fisheye terminal according to claim 1, characterized in that: The plate parts of the support spring (4) located on the front and rear sides of the middle section (4-1) and the inclined transition points of the middle section (4-1) correspond to the transition connection points of the front guide section (3-1) and the middle holding section (3-2) of the two elastic contact arms (3) and the transition connection points of the tail support section (3-3) and the middle holding section (3-2).

3. The fisheye terminal according to claim 2, characterized in that: The angle between the sheet portion of the supporting spring (4) located on the front and rear sides of the middle section (4-1) and the inclined transition point of the middle section (4-1) is 5° to 15°.

4. The fisheye terminal according to any one of claims 1-3, characterized in that: In the width direction of the press-fit part (2), the width of the support spring (4) is 0.4 to 0.7 times the width of the press-fit part (2), and the included angle between the two sides of the support spring (4) is 90° to 150°.

5. The fisheye terminal according to any one of claims 1-3, characterized in that: The thickness of the support spring (4) is 0.1 to 0.35 times the thickness of the press-fit part (2).

6. The fisheye terminal according to any one of claims 1-3, characterized in that: In the thickness direction of the press-fit part (2), the cross-section of the two elastic contact arms (3) is hexagonal and the adjacent sides are connected by a circular arc segment (3-7). The two elastic contact arms (3) each have an inner side surface (3-4), an outer contact surface (3-5) for contacting the conductive hole of the printed circuit board, two sides in the thickness direction, and a slope (3-6) connecting the outer contact surface (3-5) and the two sides in the thickness direction. The inner side surface (3-4) is connected to the support spring (4). The angle between the outer contact surface (3-5) and the two slopes (3-6) is 20° to 40°. The width of the outer contact surface (3-5) is 1 / 3 to 2 / 3 of the thickness of the press-fit part (2). The circular arc segment (3-7) connecting the outer contact surface (3-5) and the two slopes (3-6) and the circular arc segment (3-7) connecting the two sides in the thickness direction and the two slopes (3-6) are on the same circumference or inscribed in the same circle.

7. The fisheye terminal according to any one of claims 1-3, characterized in that: The middle retaining section (3-2) of the two elastic contact arms (3) is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit part (2).

8. The fisheye terminal according to any one of claims 1-3, characterized in that: The front ends of the two elastic contact arms (3) are inclined and retracted to form the front guide section (3-1), and the tail ends are inclined and retracted to form the tail support section (3-3). The included angle of the front end and the included angle of the tail end are 20° to 60°, and the included angle of the tail end is greater than the included angle of the front end, so that the tail support section (3-3) of the two elastic contact arms (3) has a stronger resistance to deformation than the front guide section (3-1).

9. A fisheye terminal, comprising a press-fit portion (2) for insertion into a conductive hole on a printed circuit board, the press-fit portion (2) comprising two opposing elastic contact arms (3), each elastic contact arm (3) comprising a front guide section (3-1), a middle retaining section (3-2), and a rear support section (3-3) along its length, the two elastic contact arms (3) forming a deformable space, characterized in that: The deformation space is provided with front and rear spaced support springs (4), each support spring (4) is connected to the elastic contact arms (3) on both sides. In the width direction of the press fitting part (2), the two sides of each support spring (4) are higher than the middle position and form a V shape so that it deforms when squeezed and provides elastic force to the elastic contact arms (3) on both sides to expand outward. In the length direction of the press fitting part (2), the support spring (4) in the middle extends parallel to the insertion direction, and the support springs (4) at both ends extend obliquely from the end closer to the middle to the end farther from the middle, so that it provides a greater elastic force to the elastic contact arms (3) than the support spring (4) in the middle.

10. The fisheye terminal according to claim 9, characterized in that: In the thickness direction of the press-fit part (2), the support springs (4) at both ends extend obliquely toward the same side of the support spring (4) in the middle.

11. The fisheye terminal according to claim 10, characterized in that: There are deformation clearance holes (5) between the support springs (4) at both ends and the support springs (4) in the middle. The two deformation clearance holes (5) correspond to the transition connection between the front guide section (3-1) and the middle holding section (3-2) of the two elastic contact arms (3) and the transition connection between the tail support section (3-3) and the middle holding section (3-2).

12. The fisheye terminal according to claim 11, characterized in that: In the thickness direction of the press-fit section (2), the support springs (4) at both ends and the support springs (4) in the middle arch in opposite directions.

13. The fisheye terminal according to claim 12, characterized in that: The support springs (4) at both ends extend at an angle of 5° to 15° from the end closer to the middle to the end further away from the middle.

14. The fisheye terminal according to any one of claims 9-13, characterized in that: In the width direction of the press-fit part (2), the width of each support spring (4) is 0.4 to 0.7 times the width of the press-fit part (2), and the included angle between the two sides of each support spring (4) is 90° to 150°.

15. The fisheye terminal according to any one of claims 9-13, characterized in that: The thickness of each support spring (4) is 0.1 to 0.35 times the thickness of the press-fit part (2).

16. The fisheye terminal according to any one of claims 9-13, characterized in that: In the thickness direction of the press-fit part (2), the cross-section of the two elastic contact arms (3) is hexagonal and the adjacent sides are connected by a circular arc segment (3-7). The two elastic contact arms (3) each have an inner side surface (3-4), an outer contact surface (3-5) for contacting the conductive hole of the printed circuit board, two sides in the thickness direction, and a slope (3-6) connecting the outer contact surface (3-5) and the two sides in the thickness direction. The inner side surface (3-4) is connected to the support spring (4). The angle between the outer contact surface (3-5) and the two slopes (3-6) is 20° to 40°. The width of the outer contact surface (3-5) is 1 / 3 to 2 / 3 of the thickness of the press-fit part (2). The circular arc segment (3-7) connecting the outer contact surface (3-5) and the two slopes (3-6) and the circular arc segment (3-7) connecting the two sides in the thickness direction and the two slopes (3-6) are on the same circumference or inscribed in the same circle.

17. The fisheye terminal according to any one of claims 9-13, characterized in that: The middle retaining section (3-2) of the two elastic contact arms (3) is a straight section parallel to the insertion direction, and the length of the straight section is 0.1 to 0.5 times the length of the press-fit part (2).

18. The fisheye terminal according to any one of claims 9-13, characterized in that: The front ends of the two elastic contact arms (3) are inclined and retracted to form the front guide section (3-1), and the tail ends are inclined and retracted to form the tail support section (3-3). The included angle of the front end and the included angle of the tail end are 20° to 60°, and the included angle of the tail end is greater than the included angle of the front end, so that the tail support section (3-3) of the two elastic contact arms (3) has a stronger resistance to deformation than the front guide section (3-1).

19. A contact, comprising a connecting portion (1) for connecting to a component and a fisheye terminal connected to the connecting portion (1), characterized in that: The fisheye terminal is the fisheye terminal as described in any one of claims 1-8 or the fisheye terminal as described in any one of claims 9-18.

20. A connector, comprising a contact, the contact including a connecting portion (1) for connecting to a component and a fisheye terminal connected to the connecting portion (1), characterized in that: The fisheye terminal is the fisheye terminal as described in any one of claims 1-8 or the fisheye terminal as described in any one of claims 9-18.

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