A multi-contact connection structure of a plug-in terminal

Abstract

The utility model relates to the technical field of electric connection terminal, concretely is a kind of plug-in terminal multi-contact connection structure.A kind of plug-in terminal multi-contact connection structure, including male terminal, female terminal, the connecting groove for the male terminal insertion connection is equipped in female terminal, the contact piece with the elasticity in connecting groove is equipped with and is contacted with male terminal, female terminal, it is characterized in that, the shape matching of contact piece and connecting groove and tightly adhere to the inner wall of connecting groove, contact piece is equipped with several concave and interval arrangement's grid strip, grid strip is equipped with connection contact point and the connection contact point on adjacent two sections of grid strip is staggered arrangement.The utility model uses the connection contact point of staggered arrangement, realizes the multiple section contact of male terminal and contact piece in limited space, increases contact area by point surface combination contact mode, improves load capacity, improves the connection stability of male terminal and female terminal in plug-in terminal;It can make contact position dispersion, avoid energy aggregation and lead to temperature rise.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection terminal technology, specifically to a multi-contact connection structure for plug-in terminals. Background Technology

[0002] In the field of electrical connections, plug-in terminals are crucial components for achieving circuit connections, and their connection stability directly affects the normal operation of the circuit. Existing plug-in terminals typically include male and female terminals, with the male terminal inserted into the connecting slot of the female terminal to achieve connection. However, in traditional connection structures, the number of contact points between the male and female terminals is limited, resulting in a limited contact area. Under the influence of external forces such as vibration and impact, poor contact can easily occur, affecting the stability and reliability of the connection and failing to meet the requirements of some applications with high connection quality.

[0003] Chinese utility model CN214153361U (announcement date 2021.09.07) provides a fastening type socket contact. This fastening type socket contact can effectively ensure the contact area between the waist of the torsion spring and the pin during long-term insertion and removal, avoiding the phenomenon of reduced conductivity. At the same time, it can reduce the wear of the pin itself after a period of use. Moreover, the curvature of the middle grid bar is larger after torsion, and the inner circle of the waist of the connecting torsion spring is smaller, thereby forming a greater clamping force on the positioning pin. The grid bar inside the torsion spring adopts an arc design to prevent the middle grid bar from scratching the positioning pin.

[0004] However, in the above technical solutions, there is only one contact between the pin and the grid bar, the overall contact area is small, the load capacity is low, and the connection structure is unstable, which can easily lead to problems such as poor connection and excessive energy concentration resulting in large temperature rise. Utility Model Content

[0005] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0006] A multi-contact connection structure for plug-in terminals includes a male terminal and a female terminal. The female terminal has a connecting groove for the male terminal to be inserted and connected. The connecting groove has a flexible contact element that contacts and connects with the male terminal and the female terminal. The contact element matches the shape of the connecting groove and is tightly attached to the inner wall of the connecting groove. The contact element has a plurality of recessed and spaced-apart grids. The grids have connecting contact points, and the connecting contact points on adjacent grid segments are staggered.

[0007] Furthermore, the contact points on the grid bars are wavy, and the peaks of the contact points on adjacent grid bars are staggered.

[0008] Furthermore, the contact element is formed by stamping a metal sheet into a grid, then rolling it into a column shape, and forming an upper spring and a lower spring connected by the grid.

[0009] Optionally, the groove opening of the connecting groove is provided with a protruding step, and the contact element is locked in the connecting groove by the step.

[0010] Optionally, the contact element is welded and fixed inside the connecting groove.

[0011] Optionally, a pressure cap is provided at the opening of the connecting groove to press the contact element into the connecting groove.

[0012] Optionally, the connecting groove is provided with positioning protrusions, and the two sides of the metal sheet abut against the two sides of the positioning protrusions respectively.

[0013] Optionally, the upper and lower springs are each provided with outwardly protruding pry bars, and the connecting groove is provided with positioning grooves corresponding to the pry bars.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model adopts staggered connection contacts to achieve multi-segment contact between the male terminal and the contact element in a limited space. By combining point and surface contact, the contact area is increased, the load capacity is improved, and the connection stability of the male and female terminals in the plug-in terminal is enhanced. At the same time, the contact positions can be dispersed to avoid energy accumulation and large temperature rise.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is another structural schematic diagram of the present invention.

[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the contact element in this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of Embodiment 3 of this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of Embodiment 4 of this utility model. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-4 A multi-contact connection structure for plug-in terminals includes a male terminal 1 and a female terminal 2. The female terminal 2 has a connecting groove 21 for the male terminal 1 to be inserted and connected. The connecting groove 21 contains a flexible contact element 3 that contacts and connects with both the male terminal 1 and the female terminal 2. The contact element 3 matches the shape of the connecting groove 21 and is tightly fitted to its inner wall. The contact element 3 has several recessed and spaced-apart grid strips 31, each with connecting contact points 32, and the connecting contact points 32 on adjacent grid strips 31 are staggered. This invention uses staggered connecting contact points 32 to achieve multi-segment contact between the male terminal 1 and the contact element 3 within a limited space. Through a point-to-surface contact method, the contact area is increased, the load capacity is improved, and the connection stability of the male terminal 1 and the female terminal 2 in the plug-in terminal is enhanced. Simultaneously, it disperses the contact positions, avoiding energy accumulation and large temperature rise. Furthermore, as... Figure 1 , 4 As shown, the grid 31 is arranged along the insertion and removal direction, which helps to reduce resistance during the insertion and removal process and improve the insertion and removal life of the product.

[0027] Furthermore, the connecting contact points 32 on the grid 31 are wavy, and the crests of the connecting contact points 32 on adjacent grid sections 31 are staggered. The wavy elastic shape of the connecting contact points 32 helps to reduce resistance during insertion and removal, making the process smoother.

[0028] Furthermore, the contact element 3 is formed by stamping a grid 31 from a metal sheet and then rolling it into a column shape, forming an upper spring 33 and a lower spring 34 connected by the grid 31. Specifically, the contact element 3 can be formed by stamping the metal sheet in one step, or the grid 31 can be stamped on the metal sheet first and then the connecting contact points 32 can be stamped in a second step. The contact element 3, using this one-piece metal sheet forming method, has high integrity and makes the product structure more stable.

[0029] Furthermore, a positioning protrusion 212 is provided in the connecting groove 21, and the two sides of the metal sheet abut against the two sides of the positioning protrusion 212 respectively. The positioning protrusion 212 prevents the contact element 3 from rotating in the connecting groove 21 and causing wear, thus extending the product's service life.

[0030] The contact element 3 of this utility model has the following embodiments depending on the installation method:

[0031] [Example 1]: Optional, such as Figure 5 As shown, the opening of the connecting groove 21 is provided with a protruding step 211, and the contact 3 is held in place within the connecting groove 21 by the step 211. The step 211 in the connecting groove 21 can be machined by turning an internal bore or formed in one piece by 3D printing technology. When installing the contact 3, the contact 3 is rolled up to be smaller than the opening of the connecting groove 21. After the contact 3 is placed in the connecting groove 21, under the action of elasticity, the contact 3 unfolds and fits tightly against the inner wall of the connecting groove 21 and is held in place within the connecting groove 21 by the step 211, preventing the contact 3 from falling off during insertion and removal.

[0032] [Example 2]: Optional, such as Figure 6 As shown, the contact 3 is welded and fixed inside the connecting groove 21. After the contact 3 is placed into the connecting groove 21, it can be fixed inside the connecting groove 21 by means of laser welding or other methods.

[0033] [Example 3]: Optional, such as Figure 7 As shown, a pressure cap 213 is provided at the opening of the connecting groove 21 to press the contact 3 into the connecting groove 21. Specifically, the pressure cap 213 can be connected and fixed to the male terminal 1 by welding, threaded connection or other methods, and the inner ring of the pressure cap 213 protrudes from the inner edge of the connecting groove 21 to play a locking role for the internal contact 3.

[0034] [Example 4]: Optional, such as Figure 8 As shown, the upper spring 33 and the lower spring 34 are respectively provided with outwardly protruding pry bar 35, and the connecting groove 21 is provided with a positioning groove 214 corresponding to the pry bar 35.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A multi-contact connection structure for plug-in terminals, comprising a male terminal and a female terminal, wherein the female terminal has a connecting groove for the male terminal to be inserted and connected, and the connecting groove has a flexible contact element that contacts and connects with the male terminal and the female terminal, characterized in that... The contact element matches the shape of the connecting groove and is tightly attached to the inner wall of the connecting groove. The contact element is provided with several recessed and spaced grid bars. The grid bars are provided with connecting contact points, and the connecting contact points on adjacent grid bars are staggered.

2. The multi-contact connection structure for plug-in terminals according to claim 1, characterized in that, The contact points on the grid bars are wavy, and the crests of the contact points on adjacent grid bars are staggered.

3. The multi-contact connection structure for plug-in terminals according to claim 1, characterized in that, The contact element is formed by stamping a metal sheet into a grid, then rolling it into a column shape, and forming an upper spring and a lower spring connected by the grid.

4. The multi-contact connection structure for plug-in terminals according to claim 1 or 3, characterized in that, The groove opening of the connecting groove has a protruding step, and the contact element is locked in the connecting groove by the step.

5. A multi-contact connection structure for plug-in terminals according to claim 1 or 3, characterized in that, The contact parts are welded and fixed inside the connecting groove.

6. The multi-contact connection structure for plug-in terminals according to claim 1 or 3, characterized in that, The groove opening of the connecting groove is provided with a pressure cap to press the contact element into the connecting groove.

7. The multi-contact connection structure for plug-in terminals according to claim 3, characterized in that, The connecting groove is equipped with a positioning protrusion, and the two sides of the metal sheet abut against the two sides of the positioning protrusion.

8. The multi-contact connection structure for plug-in terminals according to claim 3, characterized in that, The upper and lower spring plates are respectively provided with outwardly protruding pry bars, and the connecting groove is provided with positioning grooves corresponding to the pry bars.

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