Elastic locking structure, socket wiring terminal and plug wiring terminal

Abstract

The invention discloses an elastic locking structure, a socket wiring terminal and a plug wiring terminal, and relates to the technical field of wiring terminals, the elastic locking structure comprises a terminal box body and a clamping elastic sheet, the side surface of the terminal box body is provided with a through hole, and the clamping elastic sheet is integrally connected with the side wall of the through hole. The clamping elastic piece is integrally connected to the side wall of the through hole of the terminal box body, the length L1 of the clamping elastic piece is larger than the length L2 of the through hole, when the clamping elastic piece is overpressed, the clamping elastic piece deforms, however, after the clamping elastic piece is overpressed, the clamping elastic piece and the side wall of the through hole are blocked, and the clamping elastic piece cannot retract into the terminal box body along the through hole; therefore, the situation that the clamping elastic sheet does not rebound when the clamping elastic sheet is compressed back into the terminal box body is avoided, the clamping stability of the clamping elastic sheet on the terminal box body and the connector plastic shell is further ensured, and the problem that the clamping elastic sheet on the existing terminal box body is compressed back into the box body along a through hole in the box body due to overpressure, so that the clamping elastic sheet cannot rebound is solved. And the phenomenon that the clamping elastic sheet does not rebound easily occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of connection terminals, and in particular to an elastic locking structure, a socket connection terminal and a plug connection terminal. Background Art

[0002] Chinese patent application publication number CN114824868A discloses a spring-type socket terminal, which includes a body with a spring provided on the body. The first end of the spring is fixedly connected to the body, and the second end of the spring is a free end. The second end of the spring is bent toward the first end of the spring to form a plug-in slot. The side wall of the second end of the spring is bent toward the inside of the plug-in slot to form a bent protrusion. When the pin of the plug terminal is inserted into the plug-in slot, the bent protrusion and the side wall of the first end of the spring can squeeze and fix the pin; wherein, the distance H1 between the above-mentioned bent protrusion and the side wall of the first end of the spring can be adjusted to adapt to pins with different plating materials.

[0003] However, the above-mentioned spring-type socket terminal is provided with a snap-on spring that is snap-connected to the connector plastic shell. It can be uniquely inferred from the specification and the drawings in the specification that when the snap-on spring is deformed by overpressure, it will retract into the box along the through hole on the box. After the snap-on spring retracts into the box, the snap-on spring will not rebound, thereby affecting the stability of the snap-on connection between the terminal and the connector plastic shell. Summary of the Invention

[0004] In response to the deficiencies in the above-mentioned background technology, the present invention proposes an elastic locking structure, a socket terminal and a plug terminal, which solves the technical problem that the snap-fit ​​spring clips on the existing terminal box will retract into the box along the through holes on the box when over-pressured, and the snap-fit ​​spring clips are prone to not rebounding.

[0005] The technical solution of the present invention is implemented as follows: an elastic locking structure includes a terminal box body 1 and a snap-on spring piece, a through hole is provided on the side of the terminal box body, the snap-on spring piece is integrally connected to the side wall of the through hole, and the length L1 of the snap-on spring piece is greater than the length L2 of the through hole. The present application has a snap-on spring integrally connected to the side wall of the through hole of the terminal box, and the length L1 of the snap-on spring is greater than the length L2 of the through hole. When the snap-on spring is over-pressurized, the snap-on spring will be deformed, but after being over-pressurized, the snap-on spring will be blocked by the side wall of the through hole and will not retract into the terminal box along the through hole. This avoids the situation where the snap-on spring does not rebound when it is over-compressed and returned to the terminal box, ensuring that the snap-on spring always rebounds, thereby ensuring the stability of the snap-on connection between the snap-on spring on the terminal box of the present application and the connector plastic shell 16, and solves the technical problem that the snap-on spring on the existing terminal box will retract into the box along the through hole on the box when over-pressurized, and the snap-on spring is prone to not rebounding.

[0006] Preferably, the side of the terminal box is formed into the snap-on spring piece by a stamping and tearing process, the stamping and tearing position is the through hole, the length of the snap-on spring piece formed by the stamping and tearing process is equal to L2, and the length of the snap-on spring piece after extrusion and expansion is L1. The snap-fit ​​spring piece of the present application is formed by a stamping and tearing process. The stamping and tearing process is used to form the snap-fit ​​spring piece, which means that the copper material is broken by the extrusion of the convex and concave dies to form the snap-fit ​​spring piece. The snap-fit ​​spring piece formed in this way is integrally connected to the terminal box, and the connection strength between the snap-fit ​​spring piece and the terminal box is relatively high. The length of the snap-fit ​​spring piece formed by the stamping and tearing process is equal to L2. At this time, the snap-fit ​​spring piece will still retract into the terminal box along the through hole after being over-pressurized. Therefore, the present application extrude and expand the snap-fit ​​spring piece formed by the stamping and tearing process. After extrusion and expansion, the length of the snap-fit ​​spring piece is L1. At this time, the snap-fit ​​spring piece will be deformed by over-pressurization. However, the snap-fit ​​spring piece will be blocked by the side wall of the through hole after being over-pressurized, and will not retract into the terminal box along the through hole.

[0007] Preferably, the end of the snap-in spring is provided with a snap-in spring chamfer, and the terminal box is provided with a box chamfer. When the snap-in spring is squeezed and deformed, the snap-in spring chamfer engages with the box chamfer along the path of the squeeze and deformation. The engagement of the snap-in spring chamfer with the box chamfer prevents the snap-in spring from retracting along the through hole into the terminal box after the snap-in spring is squeezed and deformed.

[0008] Preferably, the terminal box is provided with convex or concave ribs, which are located at the connection between the terminal box and the snap-on spring. The provision of the convex or concave ribs increases the rigidity and strength of the connection between the terminal box and the snap-on spring, and enhances the resilience of the snap-on spring.

[0009] Preferably, at least two convex or concave ribs are provided at the connection between the terminal box and the snap-on spring sheet. The provision of at least two convex or concave ribs further increases the rigidity and strength of the connection between the terminal box and the snap-on spring sheet, and further enhances the resilience of the snap-on spring sheet.

[0010] Preferably, the terminal box is provided with an error-proofing structure. The error-proofing structure is provided to distinguish the direction of the terminal box, to avoid the situation where the terminal box is inserted into the connector housing in the wrong direction, to achieve structural error-proofing of the matching of the terminal and the connector housing, and to prevent the terminal from being over-positioned.

[0011] A socket terminal comprises the above-mentioned elastic locking structure, wherein a main spring piece is wrapped and connected in the terminal box, a socket is provided at the top of the terminal box, and a socket first connection part, a socket conductor crimping part, a socket second connection part and a socket insulation layer crimping part are sequentially connected at the bottom. The main spring piece is provided to make contact and conduction with the terminal and the pin. When the socket terminal is mated with the plug terminal, the pin is inserted into the terminal box of the socket terminal along the socket and makes contact and conduction with the main spring piece. The socket conductor crimping part is provided to facilitate the connection between the socket terminal and the conductor of the wire, and at the same time, the connection strength between the socket terminal and the conductor is enhanced after the socket conductor crimping part is crimped with the conductor of the wire. The socket insulation layer crimping part is provided to facilitate the connection between the socket terminal and the conductor, and at the same time, the connection strength between the socket terminal and the conductor is enhanced after the socket insulation layer crimping part is connected with the insulation layer of the wire. The socket first connection part serves as a transition between the bottom of the terminal box and the socket conductor crimping part, and the socket first connection part provides the terminal with its own bending resistance function. The second connecting portion of the socket plays a transition role between the socket conductor crimping portion and the socket insulation layer crimping portion. At the same time, the second connecting portion of the socket also provides the terminal with a bending resistance function.

[0012] The socket's insulation crimping section features anti-slip holes. By crimping the wire with the sealing plug, the plug fills the holes, providing a pull-out force that secures the terminal, the plug, and the wire, while also sealing the connector. The crimping section is punched to varying lengths using a stamping die and then bent through the die, allowing the same product to accommodate a variety of wire specifications. The crimping section consists of two intersecting sections that hug the wire insulation, strengthening the connection between the crimping section and the wire insulation.

[0013] The socket conductor crimping portion is provided with a rectangular or trapezoidal groove, and preferably three rectangular or trapezoidal grooves are provided on the socket conductor crimping portion. The wire is wrapped by the crimping process, so that the conductor is compressed and fills the rectangular or trapezoidal groove, providing a wire pull-out force, thereby realizing a reliable connection between the terminal and the conductor; different expanded lengths of the socket conductor crimping portion are punched out by a stamping die, and are pushed and bent into shape by the die, so that the same product can adapt to wires of various specifications.

[0014] Preferably, the terminal box is provided with a secondary spring clip that extends toward the interior of the terminal box and abuts against the primary spring clip. The secondary spring clip is integrally connected to the terminal box, and the secondary spring clip and the engaging spring clip are respectively arranged on two opposing sides of the terminal box. The primary spring clip and the secondary spring clip provided on the terminal box together form a double-elastic arm simply supported beam structure, generating both insertion and extraction force and positive pressure for mating the male and female terminals, thereby extending the insertion and extraction life of the terminals, reducing the degradation of insertion and extraction performance, and providing reliable support for electrical connection.

[0015] Preferably, the main spring element comprises a U-shaped base, one end of which is connected to the interior of the terminal box and the other end is suspended. The auxiliary spring element abuts the suspended end of the base, the suspended end of the base being bent. The main spring element is provided with an inwardly protruding contact point; two such contact points are provided on the main spring element, and the two contact points are symmetrically arranged. When the main spring element has a single inwardly protruding contact point, the contact point is provided at the suspended end of the base, and the distance between the contact point and the other end of the base is the insertion distance of the pin. The provision of the contact points facilitates increased contact stability with the pin. When the main spring element has two inwardly protruding contact points, the contact points are provided at both one end and the suspended end of the base, and the two contact points are arranged opposite each other, with the distance between the two contact points being the insertion distance of the pin. The provision of two contact points further reduces the insertion distance of the pin, further increases the positive pressure exerted by the contact points on the pins, and facilitates enhanced contact stability with the pins.

[0016] The angle θ between the bend and the free-standing end of the base is θ. By adjusting the angle θ from 140° to 175°, the gap H between the bend and the terminal box can be adjusted from 0 to 0.2 mm. By adjusting the angle θ between the bend and the free-standing end of the base, the insertion spacing of the pins can be adjusted, and the positive pressure exerted by the contact points on the pins can be adjusted. When the gap H is 0.2 mm, the distance between the two opposing contact points is minimized, and the positive pressure exerted by the two contact points on the inserted pins is maximized, resulting in the strongest stability after insertion, but also the greatest insertion resistance. When the gap H is 0 mm, the distance between the two opposing contact points is maximized, and the positive pressure exerted by the two contact points on the inserted pins is minimized, resulting in the weakest stability after insertion, but also the smallest insertion resistance. Therefore, preferably, the gap H can be 0.1 mm, at which point the positive pressure exerted by the two contact points on the inserted pins is stronger, while the corresponding insertion resistance is lower.

[0017] A plug terminal includes the above-mentioned elastic locking structure, wherein the bottom of the terminal box is connected in sequence to the first plug connection part, the plug conductor crimping part, the second plug connection part, and the plug insulation layer crimping part, and the top of the terminal box is connected to the box connection part, and the top of the box connection part is connected to the pin. The plug conductor crimping part is provided to facilitate the connection between the socket terminal and the wire conductor, and at the same time, the crimping of the plug conductor crimping part with the wire conductor enhances the connection strength between the socket terminal and the wire. The plug insulation layer crimping part is provided to facilitate the connection between the socket terminal and the wire, and at the same time, the connection of the plug insulation layer crimping part with the wire insulation layer enhances the connection strength between the socket terminal and the wire. The first plug connection part serves as a transition between the bottom of the terminal box and the plug conductor crimping part, and the first plug connection part provides the terminal with its own bending resistance function. The second plug connection part serves as a transition between the socket conductor crimping part and the plug insulation layer crimping part, and the second plug connection part also provides the terminal with its own bending resistance function.

[0018] The crimping part of the plug insulation layer is also provided with an anti-slip process hole. The wire with the sealing plug is wrapped through the crimping process, so that the sealing plug fills the anti-slip process hole, providing the pulling force of the sealing plug, thereby realizing the fixed connection between the terminal and the sealing plug and the wire and the sealing function of the connector; different expanded lengths of the crimping part of the plug insulation layer are punched out by a stamping die, and are pushed and bent into shape by the die, so that the same product can adapt to wires of various specifications.

[0019] The structure of the plug conductor crimping portion is the same as that of the socket conductor crimping portion, that is, the rectangular or trapezoidal groove can also be provided on the plug conductor crimping portion.

[0020] Beneficial effects of the present invention: 1. The present application has a snap-on spring integrally connected to the side wall of the through hole of the terminal box, and the length L1 of the snap-on spring is greater than the length L2 of the through hole. When the snap-on spring is over-pressurized, the snap-on spring will be deformed, but after being over-pressurized, the snap-on spring will be blocked by the side wall of the through hole and will not retract into the terminal box along the through hole. This avoids the situation where the snap-on spring does not rebound when it is over-compressed and returned to the terminal box, ensuring that the snap-on spring always rebounds, thereby ensuring the stability of the snap-on connection between the snap-on spring on the terminal box of the present application and the connector plastic shell.

[0021] 2. The provision of the convex or concave ribs increases the rigidity and strength of the connection between the terminal box and the snap-on spring piece, thereby enhancing the resilience of the snap-on spring piece.

[0022] 3. The error-proofing structure is designed to distinguish the direction of the terminal box, avoiding the situation where the terminal box is inserted into the connector housing in the wrong direction, and realizing the structural error-proofing of the terminal and the connector housing and the thrust function to prevent the terminal from being over-positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 It is a three-dimensional diagram of the elastic locking structure of the socket terminal of the present invention.

[0025] Figure 2 for Figure 1 Cross-section Figure 1 .

[0026] Figure 3 for Figure 1 Cross-section Figure 2 .

[0027] Figure 4 This is a schematic diagram of the elastic locking structure of the socket terminal of the present invention before being inserted into the connector housing.

[0028] Figure 5 This is a schematic diagram of the elastic locking structure of the socket terminal of the present invention when it is inserted into the connector housing.

[0029] Figure 6 This is a schematic diagram of the elastic locking structure of the socket terminal of the present invention after being inserted into the connector plastic shell.

[0030] Figure 7 This is a three-dimensional diagram of the socket terminal of the present invention.

[0031] Figure 8 This is a sample diagram of the terminal box, snap-on springs, main springs and auxiliary springs after punching and tearing.

[0032] Figure 9 This is a three-dimensional diagram of the plug terminal of the present invention.

[0033] Figure 10 The figure is a schematic diagram of the socket conductor crimping portion of the present invention.

[0034] Figure 11 This is another schematic diagram of the socket conductor crimping portion of the present invention.

[0035] In the figure: 1 terminal box, 1-1 box chamfer, 2 snap-on spring clip, 2-1 snap-on spring clip chamfer, 2-2 convex rib or concave rib, 3 error-proofing structure, 4 main spring clip, 4-1 contact point, 4-2 bend, 5 auxiliary spring clip, 6 socket conductor crimping part, 6-1 rectangular or trapezoidal groove, 7 socket first connection part, 8 socket insulation layer crimping part, 9 socket second connection part, 10 plug first connection part, 11 plug conductor crimping part, 12 pin, 13 box connection part, 14 plug second connection part, 15 plug insulation layer crimping part, 16 connector plastic shell, 17 fixing block. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0037] Example 1, an elastic locking structure, such as Figure 1 、 Figure 2 and Figure 3 As shown, it includes a terminal box 1 and a snap-on elastic piece 2. A through hole is provided on the side of the terminal box 1. The snap-on elastic piece 2 is integrally connected to the side wall of the through hole. The length L1 of the snap-on elastic piece 2 is greater than the length L2 of the through hole. The present application has a snap-on spring 2 integrally connected to the side wall of the through hole of the terminal box 1, and the length L1 of the snap-on spring 2 is greater than the length L2 of the through hole. When the snap-on spring 2 is over-pressurized, the snap-on spring 2 will be deformed, but after being over-pressurized, the snap-on spring 2 will be blocked by the side wall of the through hole and will not retract along the through hole into the terminal box 1. This avoids the situation where the snap-on spring 2 does not rebound when it is over-compressed and returned to the terminal box 1, ensuring that the snap-on spring 2 always rebounds, thereby ensuring the stability of the snap-on spring on the terminal box of the present application and the fixed block 17 on the connector plastic shell 16, solving the technical problem that the snap-on spring on the existing terminal box will retract along the through hole on the box when over-pressurized, and the snap-on spring will not rebound easily. Figure 2 and Figure 3 is Figure 1 Cross-sectional views at different positions.

[0038] Example 2, based on Example 1, an elastic locking structure, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 8As shown, the side of the terminal box 1 is formed into the snap-on spring piece 2 by a stamping and tearing process, the stamping and tearing position is the through hole, the length of the snap-on spring piece 2 formed by the stamping and tearing process is equal to L2, and the length of the snap-on spring piece 2 after extrusion and expansion is L1. The snap-fit ​​spring piece 2 of the present application is formed by a stamping and tearing process. The stamping and tearing process is used to form the snap-fit ​​spring piece 2, which means that the copper material is broken by the extrusion of the convex and concave dies to form the snap-fit ​​spring piece 2. The snap-fit ​​spring piece 2 formed in this way is integrally connected to the terminal box 1, and the connection strength between the snap-fit ​​spring piece 2 and the terminal box 1 is relatively high; the length of the snap-fit ​​spring piece 2 formed by the stamping and tearing process is equal to L2, and the snap-fit ​​spring piece 2 at this time will still retract into the terminal box 1 along the through hole after being over-pressurized. Therefore, the present application extrude and expand the snap-fit ​​spring piece 2 formed by the stamping and tearing process, and the length of the snap-fit ​​spring piece 2 after extrusion and expansion is L1. At this time, the snap-fit ​​spring piece 2 will be deformed by being over-pressurized, but the snap-fit ​​spring piece 2 will be blocked by the side wall of the through hole after being over-pressurized, and will not retract into the terminal box 1 along the through hole.

[0039] Example 3, based on Example 2, an elastic locking structure, such as Figure 1 、 Figure 2 and Figure 3 As shown, the end of the snap-on spring 2 is provided with a snap-on spring chamfer 2-1, and the terminal box 1 is provided with a box chamfer 1-1. When the snap-on spring 2 is squeezed and deformed, the snap-on spring chamfer 2-1 engages with the box chamfer 1-1 along the path of the squeeze and deformation. The engagement of the snap-on spring chamfer 2-1 with the box chamfer 1-1 prevents the snap-on spring 2 from retracting along the through hole into the terminal box 1 after being squeezed and deformed.

[0040] Example 4, based on Example 3, an elastic locking structure, such as Figure 1 、 Figure 3 and Figure 8 As shown, the terminal box 1 is provided with a convex or concave rib 2-2, which is located at the connection between the terminal box 1 and the snap-on spring 2. The provision of the convex or concave rib 2-2 increases the rigidity and strength of the connection between the terminal box 1 and the snap-on spring 2, and enhances the resilience of the snap-on spring 2.

[0041] Example 5, based on Example 4, an elastic locking structure, such as Figure 1 、 Figure 3 and Figure 8 As shown, at least two convex or concave ribs 2-2 are provided at the connection between the terminal box 1 and the snap-on spring piece 2. The provision of at least two convex or concave ribs 2-2 further increases the rigidity and strength of the connection between the terminal box 1 and the snap-on spring piece 2, and further enhances the resilience of the snap-on spring piece 2.

[0042] Example 6, based on Example 5, an elastic locking structure, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 and Figure 9 As shown, the terminal box 1 is provided with an anti-error structure 3. The anti-error structure 3 is provided to distinguish the direction of the terminal box 1, to avoid the situation where the terminal box 1 is inserted into the connector housing 16 in the wrong insertion direction, and to achieve the structural anti-error function of the terminal and the connector housing 16 and the thrust function of preventing the terminal from being over-positioned.

[0043] When the embodiment 6 is implemented, when the elastic locking structure of the present application is inserted into the connector housing 16, a fixing block 17 is provided on the insertion path in the connector housing 16. As the insertion force increases, the elastic locking structure moves toward the inside of the connector housing 16. Figure 4 As shown; the elastic locking structure of the card spring 2 is squeezed by the fixed block 17 and deformed, at this time as Figure 5 As shown, the snap-on spring piece 2 is compressed toward the terminal box 1; when the snap-on spring piece 2 on the elastic locking structure passes over the fixing block 17, the snap-on spring piece 2 recovers its deformation, and the snap-on spring piece 2 is stopped and matched with the fixing block 17. Figure 6 shown.

[0044] Example 7, based on any one of Examples 1 to 6, a socket terminal, such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 10 and Figure 11As shown, it includes the above-mentioned elastic locking structure, the terminal box 1 is wrapped with a main spring piece 4, the top of the terminal box 1 is provided with a socket, and the bottom is connected with the first socket connection part 7, the socket conductor crimping part 6, the second socket connection part 9 and the socket insulation layer crimping part 8 in sequence. The main spring piece 4 is provided to make contact and conduction with the terminal and the pin 12. When the socket terminal and the plug terminal are mated, the pin 12 is inserted into the terminal box 1 of the socket terminal along the socket and makes contact and conduction with the main spring piece 4. The socket conductor crimping part 6 is provided to facilitate the connection between the socket terminal and the wire conductor. At the same time, after the socket conductor crimping part 6 is crimped with the wire conductor, the connection strength between the socket terminal and the wire is enhanced. The socket insulation layer crimping part 8 is provided to facilitate the connection between the socket terminal and the wire. At the same time, after the socket insulation layer crimping part 8 is connected with the wire insulation layer, the connection strength between the socket terminal and the wire is enhanced. The first socket connection portion 7 serves as a transition between the bottom of the terminal box 1 and the socket conductor crimping portion 6, and also provides the terminal's own bending resistance. The second socket connection portion 9 serves as a transition between the socket conductor crimping portion 6 and the socket insulation layer crimping portion 8, and also provides the terminal's own bending resistance.

[0045] The socket insulation layer crimping portion 8 is provided with an anti-slip process hole. The wire with the sealing plug is wrapped by the crimping process, so that the sealing plug fills the anti-slip process hole, providing the sealing plug with a pull-out force, achieving a fixed connection between the terminal, the sealing plug, and the wire, and the connector sealing function. Different extended lengths of the socket insulation layer crimping portion 8 are punched out by a stamping die, and then bent by the die, so that the same product can adapt to multiple specifications of wires. The socket insulation layer crimping portion 8 includes two parts arranged in a relative cross-arrangement. The two parts can cross and hold the wire insulation layer, thereby increasing the connection strength between the socket insulation layer crimping portion 8 and the wire insulation layer.

[0046] The socket conductor crimping portion 6 is provided with a rectangular or trapezoidal groove 6-1, such as Figure 10 and Figure 11 As shown, the rectangular or trapezoidal groove 6-1 can be provided on the inner side of the socket conductor crimping portion 6, as shown in FIG. Figure 10 Rectangular or trapezoidal groove 6-1 can also be provided on the outside of the socket conductor crimping portion 6, as shown Figure 11 As shown. And the number of rectangular or trapezoidal grooves 6-1 provided on the socket conductor crimping portion 6 can be selected as two, three or more according to actual needs. As a preferred solution, three rectangular or trapezoidal grooves 6-1 are provided on the inner side of the socket conductor crimping portion 6, as shown. Figure 10As shown, the wire is wrapped by a crimping process, so that the conductor is compressed and fills the rectangular or trapezoidal groove 6-1, providing a wire pull-out force, thereby achieving a reliable connection between the terminal and the conductor; different expanded lengths of the socket conductor crimping part 6 are punched out by a stamping die, and are pushed and bent into shape by the die, so that the same product can adapt to wires of various specifications.

[0047] Example 8, based on Example 7, a socket terminal, such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the terminal box 1 is provided with a secondary spring clip 5 that extends toward the interior of the terminal box 1 and abuts against the main spring clip 4. The secondary spring clip 5 is integrally connected to the terminal box 1. The secondary spring clip 5 and the clamping spring clip 2 are respectively arranged on two opposite sides of the terminal box 1. The main spring clip 4 and the secondary spring clip 5 provided on the terminal box 1 together form a double-elastic arm simply supported beam structure, generating the plugging and unplugging force and positive pressure for the male and female terminals, while also extending the plugging and unplugging life of the terminals, reducing the degradation of plugging and unplugging performance, and providing reliable support for electrical connection.

[0048] Example 9, based on Example 8, a socket terminal, such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the main spring clip 4 comprises a U-shaped base, one end of which is connected to the interior of the terminal box 1 and the other end is suspended. The auxiliary spring clip 5 abuts the suspended end of the base, which is provided with a bend 4-2. The main spring clip 4 is provided with an inwardly protruding contact point 4-1; two of these contact points 4-1 are provided on the main spring clip 4, and the two contact points 4-1 are arranged symmetrically. When the main spring clip 4 has a single inwardly protruding contact point 4-1, the contact point 4-1 is located at the suspended end of the base. The distance between the contact point 4-1 and the other end of the base is the insertion distance of the pin 12. The provision of the contact point 4-1 helps to increase the stability of the contact with the pin 12. When two inwardly protruding contact points 4-1 are provided on the main spring piece 4, contact points 4-1 are provided at one end and the suspended end of the base, and the two contact points 4-1 are arranged opposite to each other. The distance between the two contact points 4-1 is the insertion distance of the pin 12. After providing two contact points 4-1, the insertion distance of the pin 12 is further reduced, and the positive pressure of the contact point 4-1 on the pin 12 is further increased, which is conducive to enhancing the stability of contact with the pin 12.

[0049] The angle between the bend 4-2 and the suspended end of the base is θ, which can be adjusted from 140° to 175° so that the gap H between the bend 4-2 and the terminal box 1 can be changed from 0 to 0.2 mm. By adjusting the angle θ between the bend 4-2 and the suspended end of the base, the insertion spacing of the pins 12 can be adjusted, and then the positive pressure of the contact point 4-1 on the pins 12 can be adjusted. When the gap H is 0.2mm, the distance between the two relatively arranged contact points 4-1 is the smallest. At this time, the positive pressure of the two contact points 4-1 on the inserted pin 12 is the largest, and the stability of the pin 12 after insertion is the strongest, but the corresponding insertion resistance of the pin 12 is also the largest. When the gap H is 0mm, the distance between the two relatively arranged contact points 4-1 is the largest. At this time, the positive pressure of the two contact points 4-1 on the inserted pin 12 is the smallest, and the stability of the pin 12 after insertion is the weakest, but the corresponding insertion resistance of the pin 12 is also the smallest. Therefore, preferably, the gap H can be 0.1mm. At this time, the positive pressure of the two contact points 4-1 on the inserted pin 12 is strong, and the corresponding insertion resistance of the pin 12 is also low.

[0050] When the embodiment 9 is implemented, the terminal box 1 of the socket terminal is formed by a stamping and tearing process as shown in FIG. Figure 8 As shown in the sample diagram, the snap-on spring piece 2 is squeezed, expanded and elongated, and then the sample is bent to form the terminal box 1 of the socket terminal block of the present application, and then the socket first connection part 7, the socket conductor crimping part 6, the socket second connection part 9 and the socket insulation layer crimping part 8 are stamped out in sequence at the bottom of the terminal box 1 to form the socket terminal block of the present application.

[0051] Example 10, based on any one of Examples 1 to 6, a plug terminal, such as Figure 9As shown, it includes the above-mentioned elastic locking structure, the bottom of the terminal box 1 is connected in sequence with the first plug connection part 10, the plug conductor crimping part 11, the second plug connection part 14 and the plug insulation layer crimping part 15, the top of the terminal box 1 is connected with the box connection part 13, and the top of the box connection part 13 is connected with the pin 12. The plug conductor crimping part 11 is provided to facilitate the connection between the socket terminal and the wire conductor, and at the same time, after the plug conductor crimping part 11 is crimped with the wire conductor, the connection strength between the socket terminal and the wire is enhanced. The plug insulation layer crimping part 15 is provided to facilitate the connection between the socket terminal and the wire, and at the same time, after the plug insulation layer crimping part 15 is connected with the wire insulation layer, the connection strength between the socket terminal and the wire is enhanced. The first plug connection part 10 plays a transition role between the bottom of the terminal box 1 and the plug conductor crimping part 11, and the first plug connection part 10 provides the terminal itself with the bending resistance function. The second connecting portion 14 of the plug serves as a transition between the socket conductor crimping portion 6 and the plug insulation layer crimping portion 15 , and at the same time, the second connecting portion 14 of the plug also provides the terminal with a bending resistance function.

[0052] The plug insulation layer crimping part 15 is also provided with an anti-slip process hole. The wire with the sealing plug is wrapped through the crimping process, so that the sealing plug fills the anti-slip process hole, providing the pulling force of the sealing plug, thereby realizing the fixed connection between the terminal and the sealing plug and the wire and the sealing function of the connector; different expanded lengths of the plug insulation layer crimping part 15 are punched out by a stamping die, and are pushed and bent into shape by the die, so that the same product can adapt to wires of various specifications.

[0053] The structure of the plug conductor crimping portion 11 is the same as that of the socket conductor crimping portion 6. Figure 10 or Figure 11 As shown, the rectangular or trapezoidal groove 6 - 1 can also be provided on the plug conductor crimping portion 11 .

[0054] When the embodiment 10 is implemented, the terminal box 1 of the plug terminal is formed by a stamping and tearing process as shown in FIG. Figure 8 As shown in the sample diagram, the snap-on spring piece 2 is squeezed, expanded and elongated, and then the sample is bent to form the terminal box 1 of the plug terminal block of the present application, and then the first plug connection part 10, the plug conductor crimping part 11, the second plug connection part 14 and the plug insulation layer crimping part 15 are stamped out in sequence at the bottom of the terminal box 1, and the box connection part 13 and the pin 12 are stamped out in sequence at the bottom of the terminal box 1 to form the plug terminal block of the present application.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An elastic locking structure, comprising a terminal box (1) and a snap-on spring (2), characterized in that: A through hole is provided on the side of the terminal box (1); the snap-fit ​​spring piece (2) is integrally connected to the side wall of the through hole; and the length L1 of the snap-fit ​​spring piece (2) is greater than the length L2 of the through hole.

2. The elastic locking structure according to claim 1, characterized in that: The side surface of the terminal box (1) is formed into the snap-fit ​​spring piece (2) by a punching and tearing process, the punching and tearing position is the through hole, the length of the snap-fit ​​spring piece (2) formed by the punching and tearing process is equal to L2, and the length of the snap-fit ​​spring piece (2) after extrusion and expansion is L1.

3. The elastic locking structure according to claim 2, characterized in that: The end of the snap-on spring (2) is provided with a snap-on spring chamfer (2-1), and the terminal box (1) is provided with a box chamfer (1-1). When the snap-on spring (2) is squeezed and deformed, the snap-on spring chamfer (2-1) and the box chamfer (1-1) are engaged and blocked on the squeeze deformation path.

4. The elastic locking structure according to claim 3, characterized in that: The terminal box body (1) is provided with a convex rib or a concave rib (2-2), and the convex rib or the concave rib (2-2) is located at the connection between the terminal box body (1) and the clamping spring piece (2).

5. The elastic locking structure according to claim 4, characterized in that: At least two convex ribs or concave ribs (2-2) are provided at the connection between the terminal box (1) and the clamping spring piece (2).

6. The elastic locking structure according to claim 5, characterized in that: The terminal box (1) is provided with an error-proofing structure (3).

7. A socket terminal, characterized in that: The terminal box (1) comprises an elastic locking structure as described in any one of claims 1 to 6, wherein a main spring piece (4) is wrapped and connected inside the terminal box (1), a socket is provided on the top, and a first socket connection part (7), a socket conductor crimping part (6), a second socket connection part (9) and a socket insulation layer crimping part (8) are sequentially connected on the bottom.

8. The socket terminal according to claim 7, characterized in that: The terminal box (1) is provided with an auxiliary spring piece (5) extending toward the inside of the terminal box (1) and abutting against the main spring piece (4); the auxiliary spring piece (5) is integrally connected to the terminal box (1); the auxiliary spring piece (5) and the clamping spring piece (2) are respectively arranged on two opposite sides of the terminal box (1).

9. The socket terminal according to claim 8, characterized in that: The main spring piece (4) comprises a U-shaped base, one end of the base is connected to the inside of the terminal box (1), and the other end is suspended, the auxiliary spring piece (5) abuts against the suspended end of the base, the suspended end of the base is provided with a bend (4-2), and the main spring piece (4) is provided with a contact point (4-1) protruding inward; two contact points (4-1) are provided on the main spring piece (4), and the two contact points (4-1) are symmetrically arranged.

10. A plug terminal, characterized in that: The elastic locking structure comprises the elastic locking structure according to any one of claims 1 to 6, wherein the bottom of the terminal box (1) is connected in sequence with the first connecting portion (10) of the plug, the conductor crimping portion (11) of the plug, the second connecting portion (14) of the plug and the insulating layer crimping portion (15) of the plug, the top of the terminal box (1) is connected with the box connecting portion (13), and the top of the box connecting portion (13) is connected with the pin (12).

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