A board-end female DC connector

Abstract

This invention relates to the field of DC connection technology in the photovoltaic industry, specifically providing a board-end female DC connector, including a terminal block and a connector base. The terminal block has a pin at its upper end and a connector head at its lower end, and the connector base has an inner cavity. The connector base is provided with a retaining ring and a retaining seat. The pin of the terminal block is provided with a first limiting part, and the connector head is provided with a second limiting part. An anti-reverse ring is integrated between the first limiting part and the second limiting part of the terminal block, and the anti-reverse ring is provided with a slot. This invention changes the internal structure of the traditional connector base by providing a retaining ring and a retaining seat, making the connector base easier to mold. The retaining ring and retaining seat can cooperate to limit the movement of the upper and lower ends of the terminal block, making it less likely for the terminal block to fall off after assembly with the connector base. The protruding design can work together with the retaining seat to limit the radial movement of the terminal block, improving the connection effect between the terminal block and the connector base.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current connection in the photovoltaic industry, and in particular to a board-end female direct current connector. Background Art

[0002] The connector is installed on the photovoltaic inverter to connect the solar panel and the micro inverter, and transmit the DC power generated by the solar panel to the micro inverter.

[0003] The connector used in the prior art limits the movement of the terminal by setting a side recess on the inner wall of the plastic shell connecting seat. Therefore, the injection mold for manufacturing the connecting seat needs to use a forced demolding structure, that is, a threaded part or a ejector is used to apply a sufficiently large external force to demold the injection molded product. The connecting seat with the side recess does not have an adequate demolding slope, which makes the connecting seat difficult to form and has a low yield rate. The product produced by the forced demolding structure does not cooperate well with the anti-recognition ring. The independent anti-recognition ring has a poor effect on limiting the terminal. The anti-recognition ring is easily pulled out after a pulling force is applied to the terminal. In addition, the side recess can only limit the movement of a local area of ​​the terminal. When the terminal is used for external wiring, it will shake with the movement of the cable, causing the connection of the terminal relative to the connecting seat to loosen, affecting the connection effect between the two. Summary of the invention

[0004] In view of the shortcomings of the prior art described above, an object of the present invention is to provide a board-end female DC connector, which is used to solve the problem in the prior art that a side recess is set on the inner wall of a plastic shell connecting seat to limit the terminal movement, which requires forced detachment of the connecting seat, resulting in a low yield rate of the connecting seat, and the problem that the side recess has a poor limiting effect on the terminal.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a board-end female DC connector, comprising a terminal and a terminal block, wherein the terminal has a pin at the upper end and a terminal head at the lower end, and the terminal block has an inner cavity, and the terminal is inserted into the inner cavity of the terminal block through the pin and connected to the outside through the terminal head;

[0006] The terminal block is provided with a clamping ring and a clamping seat, both of which are matched in the inner cavity and form an axial movable limit for the insertion of the terminal;

[0007] The plug pin of the wiring terminal is provided with a first limiting portion, the wiring head is provided with a second limiting portion, a stop ring is integrated between the first limiting portion and the second limiting portion of the wiring terminal, and a plurality of elastic opening pieces are equidistantly arranged on the stop ring;

[0008] The first limiting portion tapers and abuts against the clamping ring to limit the upward movement of the terminal;

[0009] The end of the opening piece contacts the upper end of the holder to limit the downward movement of the terminal block;

[0010] The second limiting portion is provided with a plurality of protrusions at equal intervals, and the protrusions are matched in the holder to limit the radial shaking of the lower end of the terminal;

[0011] At least two mounting seats are arranged on the clamping ring, and the mounting seats are injection molded on the wiring seat to realize the molding of the clamping ring on the wiring seat;

[0012] The card holder is integrally formed on the wiring holder;

[0013] The clamping seat is provided with openings having the same number and corresponding positions as the mounting seat, so as to facilitate injection molding of the mounting seat.

[0014] In one embodiment of the present invention, the protrusion is tightly fitted in the socket.

[0015] In one embodiment of the present invention, the protrusion is configured as a tapered structure that is wider at the top and narrower at the bottom.

[0016] In one embodiment of the present invention, the end of the open piece is configured as a right-angle end.

[0017] As described above, the board-end female DC connector of the present invention has the following beneficial effects:

[0018] 1. By setting a clamping ring and a clamping seat in the terminal block, after the terminal is assembled on the terminal block, the clamping ring and the clamping seat respectively limit the upper and lower ends of the terminal block, so that the terminal block is firmly fixed to the terminal block, and the connection effect of the terminal block relative to the terminal block is improved; the setting of the clamping ring and the clamping seat can change the internal structure of the terminal block, replace the traditional side concave structure to position the terminal, avoid the problem of the mold forced release structure being difficult to form during the connector processing process, and improve the yield rate;

[0019] 2. By providing a protrusion on the terminal, after the terminal is assembled on the terminal block, the protrusion fits in the holder, which can limit the radial movement of the terminal, so that the terminal will not swing left and right with the movement of the cable connected to the terminal head, further improving the connection effect of the terminal relative to the terminal block;

[0020] 3. By integrating the stop ring with the terminal block into an integrated structure, the stop ring is not easy to fall off. In the assembly process, the process of installing the stop ring can be reduced, thereby improving the assembly efficiency;

[0021] 4. The present invention changes the internal structure of the traditional terminal block by arranging a clamping ring and a clamping seat on the terminal block. The inner wall of the terminal block is no longer provided with a side recess, but is changed into a straight wall, thereby avoiding the mold-forced release structure and making the terminal block product easier to form; the clamping ring and the clamping seat can cooperate to limit the movement of the upper and lower ends of the terminal block, and the terminal block is not easy to fall off after being assembled relative to the terminal block; the raised design can cooperate with the clamping seat to limit the radial shaking of the terminal block, thereby improving the connection effect of the terminal block relative to the terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic diagram of the external structure of the board-end female DC connector disclosed in the present invention.

[0023] Figure 2 Shown is a schematic structural diagram of the wiring terminals of the board-end female DC connector disclosed in the present invention.

[0024] Figure 3 Shown is a schematic cross-sectional structure diagram of the board-end female DC connector disclosed in the present invention.

[0025] Figure 4 Display as Figure 3 The U-direction cross-sectional view taken at X after removing the terminal block.

[0026] Figure 5 Display as Figure 3 The cross-sectional view in the direction of D after the terminal block is removed and cut at X.

[0027] Component number description

[0028] The wiring terminal 1; the plug pin 11; the wiring head 12; the first limiting portion 13; the second limiting portion 14; the protrusion 15; the wiring base 2; the clamping ring 21; the mounting base 211; the clamping base 22; the opening 221; the stop ring 3; the opening piece 31; the inner cavity a. DETAILED DESCRIPTION

[0029] The following is a specific embodiment of the present invention. Those skilled in the art can easily understand other advantages and benefits of the present invention from the contents disclosed in this specification.

[0030] effect.

[0031] See also Figures 1 to 5. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0032] Example 1

[0033] See also Figure 1-3 The present invention provides a board-end female DC connector, comprising a terminal 1 and a terminal block 2, wherein the terminal 1 has a plug pin 11 at the upper end and a terminal head 12 at the lower end, and the terminal block 2 has an inner cavity a. The terminal 1 is inserted into the inner cavity a of the terminal block 2 through the plug pin 11 and connected to the outside through the terminal head 12.

[0034] The terminal block 2 is provided with a collar 21 and a holder 22, which are both fitted in the inner cavity a and form an axial movable limit for the insertion of the terminal 1; the pin 11 of the terminal 1 is provided with a first limit portion 13, and the terminal head 12 is provided with a second limit portion 14, and a stop ring 3 is integrated between the first limit portion 13 and the second limit portion 14 of the terminal 1, and a plurality of elastic openings 31 are equidistantly arranged on the stop ring 3. By integrating the stop ring with the terminal into an integrated structure, the stop ring is not easy to fall off, and the installation of the stop ring can be reduced in the assembly process. The process of locking the ring improves the assembly efficiency; the first limiting portion 13 is tapered and abuts against the clamping ring 21 to limit the upward movement of the terminal 1; the end of the opening piece 31 abuts against the upper end of the clamping seat 22 to limit the downward movement of the terminal 1; the terminal 1 is inserted from the lower end of the terminal holder 2, and because the opening piece 31 of the retaining ring 3 is elastic, it is squeezed and contracted when passing through the clamping seat 22. After passing through the clamping seat 22, the opening piece 31 rebounds, and the terminal 1 cannot be pulled out from the lower end; the clamping ring 21 limits the upper end of the terminal 1, so that the terminal 1 cannot be pushed out from the top.

[0035] By setting a clamping ring 21 and a clamping seat 22 in the terminal block 2, after the terminal 1 is assembled on the terminal block 2, the upper and lower ends of the terminal 1 are limited by the clamping ring 21 and the clamping seat 22 respectively, so that the terminal 1 is firmly fixed to the terminal block 2, and the connection effect of the terminal 1 relative to the terminal block 2 is improved; the setting of the clamping ring 21 and the clamping seat 22 can change the internal structure of the terminal block 2, replace the traditional side recess structure to position the terminal 1, avoid the problem of difficult molding of the mold forced release structure during the connector processing process, and improve the yield rate.

[0036] A plurality of protrusions 15 are equidistantly arranged on the second limiting portion 14. After the wiring terminal 1 is assembled on the wiring seat 2, the protrusions 15 are engaged in the clamping seat 22 to limit the radial shaking of the lower end of the wiring terminal 1, so that the wiring terminal 1 will not shake left and right with the movement of the cable connected to the wiring head 12, thereby further improving the connection effect of the wiring terminal 1 relative to the wiring seat 2.

[0037] Example 2

[0038] See also Figure 1-3 The terminal 1 is made of metal and the terminal seat 2 is made of plastic. Since the plastic itself is elastic and the metal is rigid, during the assembly of the terminal 1 relative to the terminal seat 2, the protrusion 15 can be tightly fitted in the holder 22 and can move axially by external force; the protrusion 15 is set to a conical structure that is wide at the top and narrow at the bottom. The conical protrusion design has good rigidity, which improves the effect of the protrusion 15 resisting the holder 22 during the assembly of the terminal 1 relative to the terminal seat 2, thereby improving the radial shaking limiting effect of the terminal 1.

[0039] Example 3

[0040] See also Figure 1-3 The end of the opening piece 31 is set as a right-angle end, and the end of the opening piece 31 is not easy to slip relative to the upper end of the clamping seat 22, and the stop ring 3 can be more firmly hooked on the wiring seat 2.

[0041] Example 4

[0042] See also Figure 1-5 At least two mounting seats 211 are provided on the clamping ring 21, and the mounting seats 211 are injection molded on the wiring seat 2 to realize the molding of the clamping ring 21 on the wiring seat 2;

[0043] The card holder 22 is integrally formed on the wiring holder 2;

[0044] The holder 22 has the same number of openings 221 as the mounting seats 211 and corresponding positions, so that the mounting seats 211 can be processed by injection molding.

[0045] The forming method of the clamping ring 21 and the clamping seat 22 is simple and easy to implement, which reduces the processing difficulty of the wiring seat.

[0046] In summary, the present invention changes the internal structure of the traditional terminal block 2 by setting a clamping ring 21 and a clamping seat 22 on the terminal block 2. The inner wall of the terminal block 2 is no longer provided with a side recess, but is changed into a straight wall, thereby avoiding the mold forced release structure, and making the terminal block 2 product easier to form; the clamping ring 21 and the clamping seat 22 can cooperate to limit the upper and lower ends of the terminal 1, and the terminal 1 is not easy to fall off after being assembled relative to the terminal block 2; the design of the protrusion 15 can cooperate with the clamping seat 22 to limit the radial shaking of the terminal 1, thereby improving the connection effect of the terminal 1 relative to the terminal block 2. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A board-end female DC connector, comprising a wiring terminal (1) and a wiring seat (2), wherein the wiring terminal (1) has a plug pin (11) at the upper end and a wiring head (12) at the lower end, and the wiring seat (2) has an inner cavity (a), and the wiring terminal (1) is inserted into the inner cavity (a) of the wiring seat (2) through the plug pin (11) and is connected to an external connection through the wiring head (12); Features: The wiring seat (2) is provided with a clamping ring (21) and a clamping seat (22), and the clamping ring (21) and the clamping seat (22) are both matched in the inner cavity (a) and form an axial movable limit for the insertion of the wiring terminal (1); The plug pin (11) of the wiring terminal (1) is provided with a first limiting portion (13), and the wiring head (12) is provided with a second limiting portion (14); a stop ring (3) is integrated between the first limiting portion (13) and the second limiting portion (14) of the wiring terminal (1); and a plurality of elastic opening pieces (31) are equidistantly provided on the stop ring (3); The first limiting portion (13) is tapered and abuts against the clamping ring (21) to limit the upward movement of the connecting terminal (1); The end of the opening piece (31) contacts the upper end of the holder (22) to limit the downward movement of the connecting terminal (1); A plurality of protrusions (15) are equidistantly arranged on the second limiting portion (14), and the protrusions (15) are fitted in the clamping seat (22) to limit radial shaking of the lower end of the connecting terminal (1); At least two mounting seats (211) are arranged on the clamping ring (21), and the mounting seats (211) are injection molded on the wiring seat (2) to achieve molding of the clamping ring (21) on the wiring seat (2); The card holder (22) is integrally formed on the wiring holder (2); The holder (22) is provided with openings (221) of the same number and corresponding positions as the mounting seat (211), so as to facilitate injection molding of the mounting seat (211).

2. The board-end female DC connector according to claim 1, characterized in that: The protrusion (15) is tightly fitted in the holder (22).

3. The board-end female DC connector according to claim 2, characterized in that: The protrusion (15) is configured as a conical structure that is wide at the top and narrow at the bottom.

4. The board-end female DC connector according to claim 1, characterized in that: The end of the open piece (31) is arranged as a right-angle end.

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