Integrated spring sheet with low insertion force and high retention force
By optimizing the integrated spring clip structure and adopting designs such as arc-shaped transition plates and thinned transition plates, the problem of balancing low insertion force and high holding force has been solved, achieving convenient insertion and removal, preventing wire damage and stress concentration, and improving the stability and electrical performance of the connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WENZHOU ZHUCHENG ELECTRICAL CO LTD
- Filing Date
- 2026-05-08
- Publication Date
- 2026-06-19
AI Technical Summary
Existing integrated spring clips cannot simultaneously achieve low insertion force and high holding force, resulting in excessive insertion force, difficult insertion and removal operations, easy cutting of wires during crimping, stress concentration leading to deformation of the contact area and failure of electrical performance, and short service life.
An integrated spring sheet structure was designed, including a first crimping part, a first stress transition part, a second crimping part, a second stress transition part, and an elastic insertion terminal. Through structures such as an arc-shaped transition plate, a thinned transition plate, and a cut-resistant chamfer, stress transition and wire protection are achieved, stress distribution is optimized, insertion force is reduced, and holding force is improved.
It achieves easy insertion and removal with low insertion force, prevents wire cuts, avoids stress concentration, improves connection stability and service life, and ensures the reliability and long-term stability of electrical connections.
Smart Images
Figure CN122246512A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of connector technology, and more specifically to an integrated spring with low insertion force and high retention force. Background Technology
[0002] In today's technological context, existing integrated spring clips have technical defects, making it difficult to simultaneously meet the core usage requirements of low insertion force and high holding force. Reducing the mating dimensions to improve the holding force of the male pin connection directly leads to excessive rigidity at the insertion end and a significant increase in insertion force, resulting in laborious insertion and removal operations and failing to meet the needs of efficient and convenient assembly. Simultaneously, the sharp edges of the crimping pins at the crimping point easily cut or sever the wires during crimping, causing circuit faults and reducing the reliability of the circuit connection. During spring clip crimping operations, the stress generated in the crimping area is directly transmitted to the front contact area, easily causing dimensional deformation of the contact area, severely affecting the stability of the contact fit, and posing a risk of electrical performance failure. The lack of a reasonable stress transition structure leads to significant stress concentration problems during crimping and insertion / removal, easily resulting in metal fatigue and plastic deformation failure after long-term repeated use, resulting in a short service life. It cannot guarantee the structural stability and electrical connection performance of the spring clip during long-term operation, making it difficult to simultaneously meet the multiple usage requirements of low insertion force assembly, high holding force connection, stress isolation protection, and anti-cut wire protection.
[0003] Therefore, how to provide an integrated spring with low insertion force and high retention force to solve the defects of existing connector structures is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0004] To address this, the present invention provides an integrated spring with low insertion force and high holding force, thereby solving the problems of inconvenient assembly, low connection reliability, and short service life caused by the inability of the spring to simultaneously achieve low insertion force and high holding force during use, as well as the lack of stress transition and wire cut-proof structure in the prior art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: The connecting plate has a first pressing part connected to its bottom end, and the bottom end of the first pressing part is connected to a first stress transition part; The second crimping part is connected to the bottom end of the first stress transition part, and the bottom end of the second crimping part is connected to the second stress transition part; A flexible plug-in terminal is connected to the bottom end of the second stress transition section.
[0006] In one possible implementation, the first stress transition portion includes: An arc-shaped transition plate is connected to the bottom end of the first pressing part; Thinning transition plates are arranged in pairs and connected to the left and right ends of the arc-shaped transition plate respectively. The thinning transition plate is provided with stress transition grooves. The top end of the thinning transition plate is connected to the bottom end of the first pressing part. The thickness of the thinning transition plate is 0.2mm.
[0007] In one possible implementation, the second crimping portion includes: The second pressing arc plate is connected to the bottom end of the first stress transition part; The second pressing wing plate is arranged in pairs and is respectively connected to the left and right ends of the second pressing arc plate. The bottom inner side of the second pressing wing plate is provided with an anti-cut chamfer.
[0008] In one possible implementation, the resilient plug-in terminal includes: Terminal mounting plate, connected to the bottom end of the second stress transition section; Contact springs are arranged in pairs and installed on both sides of the front end of the terminal mounting plate. The two contact springs and the terminal mounting plate form an elastic clamping groove. The thickness of the contact springs is 0.2mm. A snap-fit hole is provided on the terminal mounting plate, and a locking spring plate is installed at the bottom end of the snap-fit hole.
[0009] In one possible implementation, the bottom of the contact spring is provided with an arc-shaped thinning guide portion, the thickness of which is 0.15mm.
[0010] In one possible implementation, the first crimping portion includes: A first pressing arc plate is connected to the bottom end of the connecting plate. First pressing wing plates are connected to the left and right ends of the first pressing arc plate. A pressing chamfer is provided on the front end of the first pressing wing plate.
[0011] In one possible implementation, the second stress transition portion includes: An irregularly shaped transition plate is connected to the bottom end of the second pressing part. Transition connecting plates are respectively connected to the left and right ends of the irregularly shaped transition plate. The top end of the transition connecting plate is connected to the bottom end of the second pressing part, and the bottom end of the transition connecting plate is connected to the elastic plug-in terminal.
[0012] This invention utilizes a first and second crimping portion to stably crimp the wires, effectively ensuring the robustness of the circuit connection. The first and second stress transition portions effectively block the transmission of stress generated during crimping to other areas, preventing unnecessary deformation caused by crimping force and reducing the risk of electrical performance failure. Simultaneously, it optimizes the overall stress distribution of the spring, avoiding metal fatigue caused by stress concentration and extending the lifespan of the spring. The elastic insertion terminal connected to the bottom of the second stress transition portion allows for low insertion force assembly while maintaining high clamping force, solving the technical problem of traditional springs being unable to balance low insertion force and high holding force. This makes spring insertion and removal operations more convenient, and the connection more stable. Overall, it balances ease of assembly, crimping protection, stress isolation, and long-term stability of the electrical connection, improving the spring's performance and operational reliability. Attached Figure Description
[0013] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0014] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.
[0015] Figure 1 This invention provides an integrated spring with low insertion force and high holding force; Figure 2 A perspective view of the thinning transition plate provided by the present invention; Figure 3 A perspective view of the locking spring plate provided by the present invention; Figure 4 A perspective view of the first press-fit wing plate provided for the present invention.
[0016] In the figure: 1 connecting plate; 2 first pressing part; 21 first pressing arc plate; 22 first pressing wing plate; 23 pressing chamfer; 3 first stress transition part; 31 arc-shaped transition plate; 32 thinning transition plate; 33 stress transition groove; 4 second pressing part; 41 second pressing arc plate; 42 second pressing wing plate; 43 anti-cut chamfer; 5 second stress transition part; 51 irregular transition plate; 52 transition connecting plate; 6 elastic plug terminal; 61 terminal mounting plate; 62 contact spring; 621 arc-shaped thinning guide part; 63 snap-fit hole; 64 locking spring plate; 65 elastic clamping groove. Detailed Implementation
[0017] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Please refer to Figures 1-4 The present invention will now describe an integrated spring with low insertion force and high holding force, as disclosed in this invention. Figure 1 The device includes a connecting plate 1, a first crimping part 2, a first stress transition part 3, a second crimping part 4, a second stress transition part 5, and a flexible plug-in terminal 6. The bottom end of the connecting plate 1 is connected to the first crimping part 2, the bottom end of the first crimping part 2 is connected to the first stress transition part 3, the bottom end of the second crimping part 4 is connected to the first stress transition part 3, the bottom end of the second crimping part 4 is connected to the second stress transition part 5, and the flexible plug-in terminal 6 is connected to the bottom end of the second stress transition part 5. When the operator inserts the wire into the spring clip and fixes the wire with the first crimping part 2 and the second crimping part 4, the first stress transition part 3 and the second stress transition part 5 absorb and buffer the stress caused by the deformation of the first crimping part 2 and the second crimping part 4, reducing stress transmission. The flexible plug-in terminal 6 can form a stable clamp and fixation of the male pin with high holding force.
[0019] In a specific embodiment, such as Figure 2The first stress transition part 3 includes an arc-shaped transition plate 31, a thinning transition plate 32, and a stress transition groove 33. The arc-shaped transition plate 31 is connected to the bottom end of the first pressing part 2. The thinning transition plates 32 are arranged in pairs and are respectively connected to the left and right ends of the arc-shaped transition plate 31. The thinning transition plate 32 is provided with a stress transition groove 33. The top end of the thinning transition plate 32 is connected to the bottom end of the first pressing part 2. The thickness of the thinning transition plate 32 is 0.2mm. The arc-shaped transition plate 31 is used to connect the first crimping part 2 and the second crimping part 4 together. The arc structure of the arc-shaped transition plate 31 connects the two thinning transition plates 32, replacing the traditional right-angle hard connection, eliminating stress concentration points at the structural abrupt change, and allowing the crimping stress to be evenly distributed along the arc surface. The thickness of the thinning transition plate 32 is less than the thickness of the first crimping part 2. The thinning transition plate 32 absorbs and dissipates the mechanical stress generated during wire crimping by reducing the thickness, reducing the transmission of crimping stress to the second crimping part 4, which causes the second crimping part 4 to deform. The stress transition groove 33 can further buffer and absorb the deformation stress.
[0020] In a specific embodiment, such as Figure 2 The second crimping part 4 includes a second crimping arc plate 41, a second crimping wing plate 42, and a cut-resistant chamfer 43. The second crimping arc plate 41 is connected to the bottom end of the first stress transition part 3. The second crimping wing plates 42 are arranged in pairs and connected to the left and right ends of the second crimping arc plate 41, respectively. The cut-resistant chamfer 43 is provided on the inner side of the bottom end of the second crimping wing plate 42. The second crimping arc plate 41 is used to work with the two second crimping wing plates 42 to gather all the wires during crimping. The second crimping wing plates 42 bend inward during crimping to tightly wrap the wires and fix them. The cut-resistant chamfer 43 prevents the wires from being cut or severed during the crimping process, ensuring the integrity of the wires and preventing the current carrying capacity from decreasing, the line from overheating, and the contact resistance from being too high due to wire damage or breakage.
[0021] In a specific embodiment, such as Figures 2-3The resilient plug-in terminal 6 includes a terminal mounting plate 61, contact springs 62, snap-fit holes 63, locking spring plates 64, and resilient clamping grooves 65. The terminal mounting plate 61 is connected to the bottom end of the second stress transition part 5. The contact springs 62 are arranged in pairs and installed on both sides of the front end of the terminal mounting plate 61. The two contact springs 62 and the terminal mounting plate 61 form an resilient clamping groove 65. The thickness of the contact springs 62 is 0.2mm. The snap-fit holes 63 are opened on the terminal mounting plate 61, and the locking spring plates 64 are installed at the bottom end of the snap-fit holes 63. The terminal mounting plate 61 provides a mounting reference for the contact spring 62 and the locking spring plate 64. The main body thickness of the contact spring 62 is 0.2mm. When the male pin is inserted from the bottom of the contact spring 62, the two contact springs 62 undergo elastic deformation, forming a stable clamping force on the male pin and providing a high holding force after the male pin is inserted, preventing the male pin from loosening or making poor contact after insertion. The rear end of the contact spring 62 is not entirely mounted on the terminal mounting plate 61, but part of it is mounted on the terminal mounting plate 61, and the other part can spring back left and right. The locking spring plate 64 is used to lock the spring to the housing. When the spring is inserted into the housing, the locking spring plate 64 is pressed into the snap-fit hole 63. After it is in place, it springs back and snaps into the limiting slot of the housing, preventing the spring from coming out of the housing during vibration or pulling.
[0022] In a specific embodiment, such as Figure 2 The bottom of the contact spring 62 is provided with an arc-shaped thinning guide portion 621, which has a thickness of 0.15mm. The arc-shaped thinning guide portion 621 is used to reduce the structural rigidity of the contact spring 62, reduce the opening resistance when the male pin is inserted, achieve low insertion force, and make the male pin insertion easier. In addition, the arc-shaped structure of the arc-shaped thinning guide portion 621 provides an insertion guide for the male pin, preventing it from being inserted off-center or crooked. At the same time, the main body of the contact spring 62 maintains its original thickness of 0.2mm without losing clamping rigidity.
[0023] In a specific embodiment, such as Figure 4 The first crimping part 2 includes a first crimping arc plate 21, a first crimping wing plate 22, and a crimping chamfer 23. The first crimping arc plate 21 is connected to the bottom end of the connecting plate 1. The first crimping wing plates 22 are connected to the left and right ends of the first crimping arc plate 21. A crimping chamfer 23 is provided on the front end of the first crimping wing plate 22. The first crimping arc plate 21 is used to cooperate with the two first crimping wing plates 22 to gather all the wires when crimping. The first crimping wing plates 22 bend inward when crimping the wires to tightly wrap the wires and fix them. The purpose of setting the crimping chamfer 23 is to facilitate the deformation of the first crimping wing plate 22 during crimping.
[0024] In a specific embodiment, such as Figure 4The second stress transition section 5 includes a shaped transition plate 51 and a transition connecting plate 52. The shaped transition plate 51 is connected to the bottom end of the second crimping section 4, and the left and right ends of the shaped transition plate 51 are respectively connected to the transition connecting plates 52. The top end of the transition connecting plate 52 is connected to the bottom end of the second crimping section 4, and the bottom end of the transition connecting plate 52 is connected to the elastic plug-in terminal 6. The shaped transition plate 51 is used to connect the second crimping section 4 to the elastic plug-in terminal 6, and the transition connecting plate 52 is used to buffer the stress generated when the second crimping flange 42 deforms, preventing the stress from being transmitted to the elastic plug-in terminal 6 and causing deformation.
[0025] In use, the wire is first inserted downwards from above the connecting plate 1 until the front end of the wire is between the second crimping part 4 and the elastic plug terminal 6. Then, the first crimping part 2 is crimped. A tool is used to bend the first crimping wing plate 22 inwards. At this time, the chamfered auxiliary tool of the crimping chamfer 23 exerts force to bend the first crimping arc plate 21 inwards. When the first crimping wing plate 22 deforms, the stress of the deformation of the first crimping wing plate 22 will be transferred to the thinning transition plate 32. Since the thickness of the thinning transition plate 32 is less than the thickness of the first crimping wing plate 22, the thinning transition plate 32 can absorb and dissipate the stress generated when the first crimping wing plate 22 deforms by reducing its thickness, thereby reducing the transmission of crimping stress to the second crimping part 4 and the elastic plug terminal 6, avoiding deformation of the second crimping part 4 and the elastic plug terminal 6 during crimping, and also ensuring the stability of the crimping of the first crimping wing plate 22. 2. After the first crimping part 2 is crimped according to the expected deformation, the first crimping wing plate 22, together with the first crimping arc plate 21, tightly wraps the wire to achieve fixation. Then, the second crimping part 4 is crimped. When the second crimping wing plate 42, together with the second crimping arc plate 41, clamps the wire, the anti-cut chamfer 43 can prevent the wire from being cut or broken, ensuring the integrity of the wire and preventing the current carrying capacity from decreasing, the line from overheating, and the contact resistance from being too high due to wire damage or breakage. At the same time, when the second crimping part 4 is crimped, the stress generated by the deformation of the second crimping wing plate 42 will be transferred to the transition connecting plate 52 and the thinning transition plate 32, so that the transition connecting plate 52 and the thinning transition plate 32 absorb the stress and prevent the deformation stress of the second crimping wing plate 42 from being transferred to the elastic plug terminal 6. This avoids the gap between the two contact springs 62 and the arc-shaped thinning guide part 621 from becoming larger, which would weaken the clamping force of the contact springs 62 on the male pin. After securing the wire, the spring clip can be inserted into the mounting housing. During insertion, the locking spring plate 64 is pressed into the snap-fit hole 63, and after reaching the correct position, it springs back and snaps into the limiting slot of the mounting housing, preventing the spring clip from coming out of the mounting housing during vibration or pulling. Then, when the male pin is inserted from the bottom of the contact spring clip 62, the two contact spring clips 62 undergo elastic deformation, forming a stable clamping force on the male pin, while providing a high holding force after the male pin is inserted, preventing the male pin from loosening or making poor contact after insertion. At the same time, the arc-shaped thinned guide portion 621 at the bottom of the contact spring clip 62 can reduce the structural rigidity of the contact spring clip 62, reduce the opening resistance when the male pin is inserted into the contact spring clip 62, achieve low insertion force, and make the male pin insertion easier. Furthermore, the arc-shaped structure of the arc-shaped thinned guide portion 621 provides an insertion guide for the male pin, preventing it from being inserted crookedly.
[0026] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. An integrated spring with low insertion force and high retention force, characterized in that, include: The connecting plate (1) has a first pressing part (2) connected to its bottom end, and the first pressing part (2) has a first stress transition part (3) connected to its bottom end. The second crimping part (4) is connected to the bottom end of the first stress transition part (3), and the bottom end of the second crimping part (4) is connected to the second stress transition part (5). The flexible plug-in terminal (6) is connected to the bottom end of the second stress transition part (5).
2. The integrated spring with low insertion force and high holding force as described in claim 1, characterized in that, The first stress transition portion (3) includes: An arc-shaped transition plate (31) is connected to the bottom end of the first pressing part (2); Thinning transition plates (32) are arranged in pairs and connected to the left and right ends of the arc-shaped transition plate (31) respectively. The thinning transition plate (32) is provided with stress transition grooves (33). The top end of the thinning transition plate (32) is connected to the bottom end of the first pressing part (2). The thickness of the thinning transition plate (32) is 0.2mm.
3. The integrated spring with low insertion force and high holding force as described in claim 1, characterized in that, The second crimping part (4) includes: The second pressing arc plate (41) is connected to the bottom end of the first stress transition part (3); The second pressing wing plate (42) is set in pairs and is connected to the left and right ends of the second pressing arc plate (41) respectively. The bottom inner side of the second pressing wing plate (42) is provided with an anti-cut chamfer (43).
4. The integrated spring with low insertion force and high retention force as described in claim 1, characterized in that, The resilient plug-in terminal (6) includes: Terminal mounting plate (61) is connected to the bottom end of the second stress transition part (5); Contact springs (62) are arranged in pairs and installed on both sides of the front end of the terminal mounting plate (61). The two contact springs (62) and the terminal mounting plate (61) form an elastic clamping groove (65). The thickness of the contact springs (62) is 0.2mm. A snap-fit hole (63) is provided on the terminal mounting plate (61), and a locking spring plate (64) is installed at the bottom of the snap-fit hole (63).
5. The integrated spring with low insertion force and high retention force as described in claim 4, characterized in that, The bottom of the contact spring (62) is provided with an arc-shaped thinning guide (621), the thickness of which is 0.15mm.
6. The integrated spring with low insertion force and high holding force as described in claim 1, characterized in that, The first crimping part (2) includes: The first pressing arc plate (21) is connected to the bottom end of the connecting plate (1). The first pressing arc plate (21) is connected to the left and right ends of the first pressing wing plate (22). A pressing chamfer (23) is provided on the front end of the first pressing wing plate (22).
7. The integrated spring with low insertion force and high retention force as described in claim 1, characterized in that, The second stress transition section (5) includes: An irregularly shaped transition plate (51) is connected to the bottom end of the second pressing part (4). The left and right ends of the irregularly shaped transition plate (51) are respectively connected to transition connecting plates (52). The top end of the transition connecting plate (52) is connected to the bottom end of the second pressing part (4), and the bottom end of the transition connecting plate (52) is connected to the elastic plug-in terminal (6).