A connector that reduces insertion force
By designing a U-shaped support and an L-shaped contact piece in the female terminal structure of the connector, the problems of insertion difficulty and pin bending caused by excessive insertion force are solved, achieving smoother insertion and reliable electrical connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG KUAILI ELECTRONICS
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-17
AI Technical Summary
In existing connectors, as the number of terminals increases, the insertion force increases, leading to difficulty in insertion and easy bending of the pins, resulting in unreliable connections.
The female terminal is designed with a U-shaped support and an L-shaped contact piece. Gaps are left between the contact pieces to distribute stress. The contact bumps with a spherical structure ensure low resistance conduction. The smoothness and stability of the insertion are improved by the guide slope and the limiting structure.
It effectively reduces insertion force, prevents pin bending, ensures more reliable connection, and improves insertion smoothness and conductivity.
Smart Images
Figure CN224520237U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of connector technology, specifically relating to a connector that reduces insertion force. Background Technology
[0002] A connector is a device that connects two active devices and is used to transmit current or signals. The main application areas for electrical connectors include transportation, communication, networking, IT, medical, and home appliances. The rapid development of product technology and the rapid growth of the market in these application areas have strongly driven the development of connector technology. To date, connectors have evolved into a series of specialized products with a complete range of types and specifications, diverse structures, specialized focuses, distinct industry characteristics, and standardized systems. Connectors consist of a male terminal assembly and a female terminal assembly. The male terminal assembly includes a male housing and pins housed within it. The female terminal assembly includes a female housing and female terminals housed within it that interlock with the pins.
[0003] The increased number of terminals and pins in existing connectors leads to a corresponding increase in the insertion force required to insert the male terminal assembly into the female terminal assembly. This makes mating the male and female terminals more difficult, time-consuming, and labor-intensive. Furthermore, excessive insertion force can easily cause the pins to bend, resulting in unreliable or even failed connections between the pins and the female terminals. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a connector that reduces insertion force, effectively preventing pin bending and making the connection more reliable.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A connector for reducing insertion force includes a male housing and a plurality of pins disposed within the male housing, a female housing and a plurality of female terminals disposed within the female housing, each of the female terminals having a support portion at one end that engages with a positioning groove in the female housing and has a U-shaped cross-section, the support portion having two symmetrically distributed spreading plates at both ends, the two spreading plates having two symmetrically distributed L-shaped contact plates, a insertion space for the pins to be inserted is formed between the two contact plates, a gap communicating with the insertion space is formed between the two contact plates, and each of the two contact plates has a hemispherical contact protrusion that contacts the pins.
[0006] In some embodiments, each of the pins has two insertion guide slopes on both sides of one end, and the two contact pieces are provided with guide slopes that cooperate with the guide slopes.
[0007] In some embodiments, the support portion is provided with an anti-detachment limiting piece, the mother shell is provided with a limiting hole that cooperates with the anti-detachment limiting piece, and the mother shell is provided with an insertion guide arc surface on one side corresponding to the limiting hole. The anti-detachment limiting piece slides along the insertion guide arc surface into the limiting hole, and forms a snap-fit cooperation between the anti-detachment limiting piece and the limiting hole.
[0008] In some embodiments, the female rubber shell is provided with a locking plate that cooperates with the male rubber shell, and the male rubber shell is provided with a locking block that engages with the locking plate.
[0009] In some embodiments, one end of the latch plate has an unlocking pressing part, and the other end of the latch plate has a protrusion that engages with the locking block.
[0010] In some embodiments, the female housing is provided with two guide protrusions on both sides corresponding to the locking plate, and the male housing is provided with a guide slot that engages with the guide protrusions.
[0011] In some embodiments, two blocks are provided on both sides of the male housing corresponding to the guide slot.
[0012] In some embodiments, each of the pins has a plug portion extending outside the male housing, and the male housing is provided with heat dissipation grooves corresponding to the plug portion of each pin.
[0013] In some embodiments, each of the female terminals has a crimping portion at the other end that is crimped with the wire harness. The crimping portion includes two symmetrically distributed crimping plates and two symmetrically distributed crimping contact plates. A crimping cavity for crimping the wire harness is formed between the two crimping plates and between the two crimping contact plates.
[0014] In some embodiments, the two wire contact pads are provided with contact protrusions that contact the wire harness.
[0015] The beneficial effects of this invention are as follows: A gap is left between the two contact pieces of the female terminal, which disperses stress during insertion and removal, effectively reducing insertion force and making the insertion of the male terminal smoother. The contact protrusions, designed with a spherical structure, contact the pin, concentrating the contact pressure and piercing surface oxide layers or contaminants, ensuring low-resistance conductivity and making the contact between the female terminal and the pin more reliable. The gap provides flexibility to the insertion space of the female terminal, allowing for appropriate elastic deformation when the male terminal is inserted, forming stable contact pressure and ensuring low contact resistance and reliable conductivity. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or 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 only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.
[0017] Figure 1 This is a perspective view of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of an embodiment of the present utility model; Figure 3 This is an exploded view of an embodiment of the present utility model; Figure 4 This is a perspective view of the female terminal in an embodiment of the present utility model; Figure 5 This is a perspective view of the insert in an embodiment of the present invention. Detailed Implementation
[0018] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0020] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.
[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1-4As shown, a connector for reducing insertion force includes a male housing 1 and multiple pins 2 disposed within the male housing 1, and a female housing 3 and multiple female terminals 4 disposed within the female housing 3. Each female terminal 4 has a U-shaped support portion 41 at one end that engages with a positioning groove 31 in the female housing 3. The support portion 41 has two symmetrically distributed spreading tabs 42 at both ends. Each spreading tab 42 has two symmetrically distributed L-shaped contact tabs 43. A mating space 430 for the pins 2 to be inserted is formed between the two contact tabs 43. A gap 431 communicating with the mating space 430 is formed between the two contact tabs 43. Each of the two contact tabs 43 has a hemispherical contact protrusion 44 that contacts the pins 2. The gap between the two contact tabs of the female terminal disperses stress during insertion and removal, effectively reducing the insertion force and making the insertion of the male terminal smoother. This prevents the pins from bending due to excessive insertion force. The contact bumps, designed with a spherical structure, make contact with the pins, concentrating the contact pressure and piercing surface oxide layers or contaminants to ensure low-resistance conductivity, making the contact between the female terminal and the pins more reliable. The gap provides flexibility to the female terminal's insertion space, allowing for appropriate elastic deformation when the male terminal is inserted, forming stable contact pressure and ensuring low contact resistance and reliable conductivity.
[0022] like Figure 4 and 5 As shown, each pin 2 has two insertion guide slopes 21 on both sides of one end, and the two contact pieces 43 have guide slopes 432 that cooperate with the guide slopes 21. The insertion guide slopes guide the pins and ensure that the pins are smoothly inserted into the female terminal.
[0023] like Figure 2 and 3As shown, the support part 41 is provided with an anti-detachment limiting piece 411, and the female rubber shell 1 is provided with a limiting hole 11 that cooperates with the anti-detachment limiting piece 41. The female rubber shell 1 is provided with an insertion guide arc surface 12 on one side corresponding to the limiting hole 11. The anti-detachment limiting piece 41 slides along the insertion guide arc surface 12 into the limiting hole 11, and forms a snap-fit engagement between the anti-detachment limiting piece 411 and the limiting hole 11. The support part of the female terminal is engaged in the limiting hole of the female rubber shell by the anti-detachment limiting piece, thereby ensuring a tighter connection between the female terminal and the female rubber shell, and preventing the female terminal from loosening or falling off. The insertion guide arc surface plays a guiding role for the anti-detachment limiting piece, ensuring that the female terminal can be smoothly installed into the female rubber shell, making assembly more convenient. The female rubber shell 3 is provided with a locking plate 32 that cooperates with the male rubber shell 1, and the male rubber shell 1 is provided with a locking block 13 that engages with the locking plate 32. The female rubber shell engages with the locking block of the male rubber shell via a locking plate, facilitating the insertion of the male and female rubber shells. One end of the locking plate 32 has an unlocking press part 321, and the other end has a protrusion 322 that engages with the locking block 13. The engagement of the locking plate with the locking block via the protrusion facilitates the insertion of the male and female rubber shells, ensuring a tighter connection between them.
[0024] like Figure 1 and 3 As shown, the female housing 3 has two guide protrusions 33 on both sides corresponding to the locking plate 32, and the male housing 1 has a guide slot 14 that engages with the guide protrusions 33. The guide protrusions serve a guiding function, ensuring smooth insertion of the female and male housings. The male housing 11 has two stops 141 on both sides corresponding to the guide slot 14. Each pin 2 has a insertion portion 22 extending outside the male housing 1, and a heat dissipation groove 15 is provided on the male housing 1 at the insertion portion 22 of each pin 2. The heat dissipation groove increases the surface area of the male housing, accelerates heat dissipation through natural convection, and prevents the pins from overheating due to contact resistance. This improves the connection reliability of the connector.
[0025] like Figure 3 and 4 As shown, each female terminal 4 has a crimping portion 45 at its other end for crimping with the wire harness. The crimping portion 45 includes two symmetrically distributed crimping tabs 451 and two symmetrically distributed crimping contact tabs 452. A crimping cavity 450 for crimping the wire harness is formed between the two crimping tabs 451 and between the two crimping contact tabs 452. The female terminal is crimped onto the wire harness by the two crimping tabs and the two crimping contact tabs, thereby ensuring a more secure connection between the female terminal and the wire harness. The two crimping contact tabs 452 are provided with contact protrusions 453 that contact the wire harness. The contact protrusions contact the wire harness, thereby ensuring a more reliable connection between the female terminal and the wire harness.
[0026] The above description is only one embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model; the scope of protection of the present utility model is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the utility model are within the scope of protection of the present utility model patent.
Claims
1. A connector that reduces insertion force, comprising a male housing and a plurality of male pins provided in the male housing, and a female housing and a plurality of female terminals provided in the female housing, characterized by: Each of the aforementioned female terminals has a U-shaped support portion at one end that engages with a positioning groove in the female housing. The support portion has two symmetrically distributed spreading plates at both ends. The two spreading plates have two symmetrically distributed L-shaped contact plates. A insertion space for inserting a pin is formed between the two contact plates. A gap communicating with the insertion space is formed between the two contact plates. Each of the two contact plates has a hemispherical contact protrusion that contacts the pin.
2. The reduced insertion force connector of claim 1, wherein: Each of the aforementioned pins has two insertion guide slopes on both sides of one end, and the two contact pieces are provided with guide slopes that cooperate with the guide slopes.
3. The reduced insertion force connector of claim 1, wherein: The support portion is provided with an anti-detachment limiting piece, and the mother shell is provided with a limiting hole that matches the anti-detachment limiting piece. The mother shell is provided with an insertion guide arc surface on one side corresponding to the limiting hole. The anti-detachment limiting piece slides along the insertion guide arc surface into the limiting hole, and forms a snap-fit engagement between the anti-detachment limiting piece and the limiting hole.
4. The reduced insertion force connector of claim 1, wherein: The female rubber shell is provided with a locking plate that cooperates with the male rubber shell, and the male rubber shell is provided with a locking block that engages with the locking plate.
5. The reduced insertion force connector of claim 4, wherein: The latch plate has an unlocking pressing part at one end and a protrusion at the other end that engages with the locking block.
6. The reduced insertion force connector of claim 4, wherein: The female housing has two guide protrusions on both sides corresponding to the locking plate, and the male housing has a guide slot that engages with the guide protrusions.
7. The reduced insertion force connector of claim 6, wherein: The male plastic shell has two stops on both sides corresponding to the guide slot.
8. The reduced insertion force connector of claim 1, wherein: Each of the aforementioned pins has a plug portion extending outside the male housing, and the male housing is provided with heat dissipation grooves corresponding to the plug portion of each pin.
9. The reduced insertion force connector of claim 1, wherein: Each of the aforementioned female terminals has a crimping portion at the other end that is crimped with the wire harness. The crimping portion includes two symmetrically distributed crimping plates and two symmetrically distributed crimping contact plates. A crimping cavity for crimping the wire harness is formed between the two crimping plates and between the two crimping contact plates.
10. The reduced insertion force connector of claim 9, wherein: The two wire contact pieces are provided with contact protrusions that contact the wire harness.