Dual spring contact terminal set and low insertion force connector

Abstract

The utility model relates to a terminal set of double elastic contact and low plug-in force connector. The utility model discloses a terminal set of double elastic contact, include: male terminal, its one end is equipped with first function department, and the first function department includes a plurality of first elastic sheet that protrude in the middle, and a plurality of first elastic sheet interval surrounds and is in the circumferential shape, female terminal is equipped with second function department, and the second function department is equipped with the cylindrical insertion cavity, and the first function department is inserted in the insertion cavity, and the cavity wall of insertion cavity is cut along its length direction and is equipped with the deformation cut, male terminal and female terminal are in the insertion state, and the first elastic sheet elastically abuts at the inner wall of insertion cavity to make the deformation cut elastic expansion. The utility model discloses a terminal set of double elastic contact, through the male terminal contact site design is the convex elastic structure of circumferential shape, and the female terminal adopts the elastic structure of whole round, and the terminal set is inserted and realizes double elastic contact structure, avoids strong interference and causes female end expansion, also reduces the elastic fatigue of male terminal and female terminal.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a terminal group with double elastic contact and a connector with low insertion and extraction force. Background Technology

[0002] Terminal blocks, as key components for circuit connections, play a crucial role in the overall operational stability and reliability of equipment. Traditional terminal blocks suffer from numerous problems in areas such as the female terminal clamp structure, male terminal contact design, and the mating of male and female terminals, severely limiting their application in modern electrical equipment.

[0003] From the perspective of the female terminal structure, the traditional female terminal clamp design is an elliptical two-end contact structure, which is extremely complex. Its complexity lies not only in the special shape but also in the extremely high precision requirements of the parts. To ensure a stable and reliable electrical connection, the dimensional accuracy, shape accuracy, and surface roughness of each part must be strictly controlled during production. However, such high precision requirements undoubtedly increase manufacturing difficulty and cost significantly. High-precision machining requires more advanced and precise processing equipment, while also posing a severe challenge to the skill level and experience of operators. Furthermore, the complex structural design makes the production process more cumbersome, further increasing production costs. In large-scale production applications, this undoubtedly becomes a significant factor restricting product competitiveness. From the perspective of the male terminal structure, the traditional male terminal adopts a solid, integral structure. The main drawback of this structure is the lack of elasticity in the contact points. This prevents the contact points from adaptively adjusting to different connection conditions, making it difficult to tightly fit the female terminal clamp, easily leading to poor contact, increased resistance, unstable signal transmission, and other problems, seriously affecting the normal operation of electrical equipment.

[0004] The problem becomes even more pronounced when the male and female terminals are being inserted and removed. The traditional rigid contact structure of the male terminal is highly susceptible to damage to the female terminal clamp under extreme insertion and removal conditions, significantly increasing the risk of bulging in the female terminal clamp. Once bulging occurs in the female terminal clamp, the fit accuracy with the male terminal will decrease drastically, and contact stability will be severely affected. Even more seriously, there is a risk of momentary interruption in the male-female contact during insertion and removal. This momentary interruption can cause a sudden power outage in electrical equipment. For equipment with extremely high requirements for power continuity, such as automobiles, medical equipment, and precision instruments, a momentary interruption can lead to equipment failure, data loss, or even equipment damage, resulting in incalculable losses. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a terminal group with double elastic contact. By designing the contact position of the male terminal as a circumferentially convex elastic structure and the female terminal adopting an overall round elastic structure, the male and female terminals are inserted to achieve a double elastic contact structure, avoiding strong interference that causes the female terminal to expand the hole, and also reducing the elastic fatigue of the male and female terminals.

[0006] Another objective of this invention is to provide a low insertion / extraction force connector. By employing a double elastic contact terminal group, the insertion / extraction force during connector use can be significantly reduced, thereby improving the connector's stability and service life.

[0007] A terminal assembly with double elastic contact, comprising:

[0008] The male terminal has a first functional part at one end, and the first functional part includes a plurality of first spring pieces protruding from the center, and the plurality of first spring pieces are spaced apart and arranged in a circumferential shape.

[0009] The female terminal has a second functional part, which has a cylindrical insertion cavity. The first functional part is inserted into the insertion cavity. The cavity wall of the insertion cavity is cut with a deformation slit along its length. When the male terminal and the female terminal are inserted, the first spring sheet elastically abuts against the inner wall of the insertion cavity to make the deformation slit elastically expand.

[0010] Furthermore, the first spring is arc-shaped; the first spring consists of three or more equally spaced pieces.

[0011] Furthermore, the male terminal also has a first holding part and a first wire clamping part. The first holding part is used to be fixedly connected to the external male housing, and the first wire clamping part is used to clamp the wire. One end of the first holding part is connected to the first functional part, and the other end is connected to the first wire clamping part.

[0012] Furthermore, the first retaining portion is provided with a first anti-reverse piece at one end near the first functional portion, and the first retaining portion is provided with a first stop protrusion at one end near the first clamping portion. Both the first anti-reverse piece and the first stop protrusion are arranged to protrude outward.

[0013] Furthermore, the female terminal is also provided with a second holding part and a second wire clamping part. The second holding part is used to be fixedly connected to the external female housing, and the second wire clamping part is used to clamp the wire. One end of the second holding part is connected to the second functional part, and the other end is connected to the second wire clamping part.

[0014] Furthermore, the second holding portion is provided with a second anti-reverse piece at one end near the second functional portion, and a second stop protrusion at one end near the second clamping portion. Both the second anti-reverse piece and the second stop protrusion protrude outward.

[0015] Furthermore, the insertion end of the first functional part is provided with an inlet portion; the inlet portion extends along the length direction of the male terminal and bends at a certain angle towards the axis.

[0016] Furthermore, the plug-in end of the second functional part is provided with a trumpet-shaped guide portion.

[0017] Furthermore, the second functional part is also provided with a plurality of equally spaced second spring pieces, the middle part of which protrudes toward the inside of the insertion cavity and abuts against the first functional part.

[0018] This utility model also provides a low insertion / extraction force connector, comprising: the terminal group described in this utility model;

[0019] The male connector housing has the male terminal fixedly inserted into it.

[0020] The female terminal is fixedly inserted into the female housing.

[0021] The beneficial effects of this utility model are as follows:

[0022] (1) By designing the male terminal contact part as a circumferentially convex elastic structure and the female terminal adopting an overall round elastic structure, the male and female terminal groups are interlocked to achieve a double elastic contact structure, avoiding strong interference that causes the female terminal to expand the hole, and also reducing the elastic fatigue of the male and female terminals.

[0023] (2) Both the male and female terminals are punched in one piece and then rounded, which is simple in process and has high structural stability;

[0024] (3) Both the male and female terminals are provided with an integrally formed anti-reverse plate and a stop boss to realize the positioning function when connected to the housing, as well as the anti-reverse function in the use state. The assembly structure is simple, which helps to simplify the housing structure and improve the stability of the product.

[0025] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is one embodiment of the terminal block in the prior art;

[0027] Figure 2 This is another implementation of the public terminal in the prior art;

[0028] Figure 3 An exploded view of a low insertion / extraction force connector provided in an embodiment of this application;

[0029] Figure 4This is an assembly diagram of a terminal group with double elastic contact provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of the male terminal provided in an embodiment of this application;

[0031] Figure 6 This is one embodiment of the female terminal provided in this application.

[0032] Figure 7 Implementation method two for the female terminal provided in this application;

[0033] Figure 8 This is a cross-sectional view of the connector.

[0034] In the diagram: 100-Clamping opening; 200-Interlocking part; 10-Male terminal; 11-First functional part; 111-First spring; 12-Introducing part; 13-First holding part; 131-First stop boss; 132-First anti-reverse piece; 14-First wire clamping part; 20-Female terminal; 21-Second functional part; 211-Interlocking cavity; 212-Deformation notch; 213-Second spring; 22-Guide part; 23-Second holding part; 231-Second stop boss; 232-Second anti-reverse piece; 24-Second wire clamping part; 30-Male socket housing; 31-First terminal hole; 311-First snap-fit ​​boss; 40-Female socket housing; 41-Second terminal hole; 411-Second snap-fit ​​boss. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] In the description of this utility model, it should be noted that the terms "vertical direction," "up," "down," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Please see Figure 1 The traditional female terminal clamp 100 is designed with an elliptical contact structure at both ends. This structure is extremely complex, not only in its unique shape but also in the extremely high precision requirements placed on the components. To ensure a stable and reliable electrical connection, the dimensional accuracy, shape accuracy, and surface roughness of each component must be strictly controlled during production. The traditional male terminal insertion part 200 uses a solid, integral structure. The main drawback of this structure is the lack of elasticity in the contact area. This prevents the contact area from adaptively adjusting to different connection conditions, making it difficult to tightly fit the female terminal clamp 100. This can easily lead to poor contact, resulting in increased resistance, unstable signal transmission, and other problems, severely affecting the normal operation of electrical equipment. The problem becomes even more pronounced during male and female terminal insertion and removal operations: the rigid contact structure of the traditional male terminal is highly susceptible to damage to the female terminal clamp 100 under extreme insertion and removal conditions. This significantly increases the risk of enlargement in the female terminal clamp 100. Once enlargement occurs, the fit accuracy between the female terminal clamp 100 and the male terminal will decrease significantly, and contact stability will be severely affected.

[0039] Please see Figure 2 Some existing male terminals use a rounded-edge forming structure on both sides for the insertion part 200. Although it has a certain degree of flexibility, it requires high dimensional accuracy, has the risk of fatigue during insertion and removal, and the contact stability will be seriously affected.

[0040] Based on this, please refer to Figure 2-6This application provides a low insertion / extraction force connector, including a male housing 30, a female housing 40, and a double-elastic contact terminal group. Specifically, the double-elastic contact terminal group includes a mating male terminal 10 and a female terminal 20, with the male terminal 10 inserted into the male housing 30 and the female terminal 20 inserted into the female housing 40. One end of the male terminal 10 is provided with a first functional part 11, which includes a plurality of first spring pieces 111 with a central protrusion, the plurality of first spring pieces 111 being spaced apart and arranged in a circumferential shape. The female terminal 20 is provided with a second functional part 21, which has a cylindrical insertion cavity 211, and the first functional part 11 is inserted into the insertion cavity 211 to realize the insertion of the male terminal 10 and the female terminal 20. The cavity wall of the insertion cavity 211 is cut with a deformation cut 212 along its length direction. The protruding part of the first spring piece 111 elastically abuts against the inner wall of the insertion cavity 211 so that the deformation cut 212 expands elastically, realizing bidirectional elastic contact between the male terminal 10 and the female terminal 20, making the terminal group more stable.

[0041] As a preferred option, both the male terminal 10 and the female terminal 20 are integrally stamped from terminal sheets and then rounded into shape. The overall forming process is simple, the product consistency is good, and the stability is high.

[0042] The terminal group provided in this application embodiment has a male terminal 10 surrounded by a circular structure of a plurality of first spring pieces 111, and a female terminal 20 with an overall circular structure having a deformation cutout 212, so that the first functional part 11 and the second functional part 21 elastically abut against each other, making their contact stability higher.

[0043] Furthermore, as a preferred embodiment, the first spring piece 111 is arc-shaped; the first spring piece 111 consists of three or more pieces arranged at equal intervals to form a circular structure. In this arrangement, the force on each first spring piece 111 is balanced, and the elastic force on the second functional part 21 is also relatively balanced, so that the insertion cavity 211 is uniformly stressed. As the deformation cut 212 increases, the insertion cavity 211 undergoes uniform elastic deformation, and the inner diameter increases, reducing the elastic fatigue of the first spring piece 111.

[0044] Furthermore, in some embodiments, the insertion end of the first functional part 11 extends to provide an introduction part 12; the introduction part 12 extends along the length direction of the male terminal 10 and bends towards the axis with a certain rounded corner. In this configuration, it is convenient for the introduction part 12 to be inserted into the insertion cavity 211.

[0045] Furthermore, in some embodiments, the plug-in end of the second functional part 21 is provided with a trumpet-shaped guide part 22, which facilitates the insertion part 12 to be inserted into the plug-in cavity 211 along the guide part 22 during installation.

[0046] Please see Figure 7Furthermore, in some other embodiments, the second functional part 21 is also provided with a plurality of equally spaced second spring pieces 213. The middle part of the second spring piece 213 protrudes toward the interior of the insertion cavity 211, and its end forms a flared guide part 22. When the male terminal 10 and the female terminal 20 are inserted, the first spring piece 111 and the second spring piece 213 are in bidirectional elastic contact.

[0047] Please see Figure 5 , Figure 6 and Figure 8 Furthermore, in some embodiments, the male terminal 10 is also provided with a first retaining portion 13 and a first wire clamping portion 14. The first retaining portion 13 is used to be fixedly connected to the external male housing 30, and the first wire clamping portion 14 is used to clamp the wire. One end of the first retaining portion 13 is connected to the first functional portion 11, and the other end is connected to the first wire clamping portion 14.

[0048] Specifically, the male seat housing 30 is provided with a plurality of first terminal holes 31, and a first snap-fit ​​boss 311 is provided in the first terminal hole 31. The first holding part 13 is fixedly snap-fitted to the first snap-fit ​​boss 311.

[0049] Specifically, the first retaining part 13 is provided with a first anti-retraction piece 132 at one end near the first functional part 11, and a first stop protrusion 131 at one end near the first clamping part 14. The first anti-retraction piece 132 is a spring-loaded latch. When the male terminal 10 is inserted into the first terminal hole 31, the first anti-retraction piece 132 is elastically deformed by the compression of the first snap-fit ​​protrusion 311. When the first stop protrusion 131 abuts against one end of the first snap-fit ​​protrusion 311, the male terminal 10 is inserted to a specified depth and no longer inserted. At this time, the first anti-retraction piece 132 passes through the first snap-fit ​​protrusion 311 and elastically recovers, abutting against the other end of the first snap-fit ​​protrusion 311, thus preventing the male terminal 10 from being dislodged from the male socket housing 30 when it is inserted.

[0050] Preferably, the first anti-reverse piece 132 and the first stop boss 131 both protrude outward and are integrally stamped with the male terminal 10, making the forming process simple and easy to implement.

[0051] Furthermore, in some embodiments, the female terminal 20 is also provided with a second holding portion 23 and a second wire clamping portion 24. The second holding portion 23 is used to be fixedly connected to the external female housing 40, and the second wire clamping portion 24 is used to clamp the wire. One end of the second holding portion 23 is connected to the second functional portion 21, and the other end is connected to the second wire clamping portion 24.

[0052] Specifically, the female housing 40 has multiple second terminal holes 41, and the second terminal holes 41 are provided with protruding second snap-fit ​​bosses 411. The second retaining part 23 is fixedly snap-fitted to the second snap-fit ​​bosses 411.

[0053] Specifically, the second retaining part 23 has a second anti-retraction piece 232 at one end near the second functional part 21, and a second stop protrusion 231 at one end near the second clamping part 24. Both the second anti-retraction piece 232 and the second stop protrusion 231 protrude outward. The second anti-retraction piece 232 is a spring-loaded latch. When the female terminal 20 is inserted into the second terminal hole 41, the second anti-retraction piece 232 is elastically deformed by the compression of the second snap-fit ​​protrusion 411, and the second stop protrusion 231 abuts against one end of the second snap-fit ​​protrusion 411. When the female terminal 20 is inserted to a specified depth and no longer inserted, the second anti-retraction piece 232 elastically recovers after passing through the second snap-fit ​​protrusion 411 and abuts against the other end of the second snap-fit ​​protrusion 411, preventing the female terminal 20 from being dislodged from the female housing 40 under force during insertion.

[0054] Compared with the prior art, the beneficial effects of the embodiments of this application are as follows:

[0055] (1) By designing the male terminal contact part as a circumferentially convex elastic structure and the female terminal adopting an overall round elastic structure, the male and female terminal groups are interlocked to achieve a double elastic contact structure, avoiding strong interference that causes the female terminal to expand the hole, and also reducing the elastic fatigue of the male and female terminals.

[0056] (2) Both the male and female terminals are punched in one piece and then rounded, which is simple in process and has high structural stability;

[0057] (3) Both the male and female terminals are provided with an integrally formed anti-reverse plate and a stop boss to realize the positioning function when connected to the housing, as well as the anti-reverse function in the use state. The assembly structure is simple, which helps to simplify the housing structure and improve the stability of the product.

[0058] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A terminal assembly with double elastic contact, characterized in that, include: The male terminal has a first functional part at one end, and the first functional part includes a plurality of first spring pieces protruding from the center, and the plurality of first spring pieces are spaced apart and arranged in a circumferential shape. The female terminal has a second functional part, which has a cylindrical insertion cavity. The first functional part is inserted into the insertion cavity. The cavity wall of the insertion cavity is cut with a deformation slit along its length. When the male terminal and the female terminal are inserted, the first spring sheet elastically abuts against the inner wall of the insertion cavity to make the deformation slit elastically expand.

2. The terminal assembly with double elastic contact according to claim 1, characterized in that: The first spring is arc-shaped; the first spring consists of three or more equally spaced pieces.

3. The terminal assembly with double elastic contact according to claim 1, characterized in that: The male terminal also has a first holding part and a first wire clamping part. The first holding part is used to be fixed to the external male housing, and the first wire clamping part is used to clamp the wire. One end of the first holding part is connected to the first functional part, and the other end is connected to the first wire clamping part.

4. The terminal assembly with double elastic contact according to claim 3, characterized in that: The first retaining portion has a first anti-reverse piece at one end near the first functional portion, and a first stop protrusion at one end near the first clamping portion. Both the first anti-reverse piece and the first stop protrusion protrude outward.

5. The terminal assembly with double elastic contact according to claim 1, characterized in that: The female terminal is further provided with a second holding part and a second wire clamping part. The second holding part is used to be fixedly connected to the external female housing, and the second wire clamping part is used to clamp the wire. One end of the second holding part is connected to the second functional part, and the other end is connected to the second wire clamping part.

6. The terminal assembly with double elastic contact according to claim 5, characterized in that: The second holding part is provided with a second anti-reverse piece at one end near the second functional part, and a second stop protrusion at one end near the second clamping part. Both the second anti-reverse piece and the second stop protrusion protrude outward.

7. The terminal assembly with double elastic contact according to claim 1, characterized in that: The insertion end of the first functional part extends to provide an inlet portion; the inlet portion extends along the length direction of the male terminal and bends at a certain angle towards the axis.

8. The terminal assembly with double elastic contact according to claim 1, characterized in that: The plug-in end of the second functional part is provided with a trumpet-shaped guide portion.

9. A terminal assembly with double elastic contact according to claim 1, characterized in that: The second functional part is further provided with several equally spaced second spring pieces, the middle part of which protrudes towards the inside of the insertion cavity and abuts against the first functional part.

10. A low insertion / extraction force connector, characterized in that, include: The terminal group according to any one of claims 1-9; The male connector housing has the male terminal fixedly inserted into it. The female terminal is fixedly inserted into the female housing.

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