electrical connectors

Abstract

An electrical connector includes a body and a plurality of terminals mounted on the body, the terminals including a first terminal group and a second terminal group, each terminal including a fixing portion for fixing to the body, a contact portion extending forward from the fixing portion, and a pin extending backward from the fixing portion, the body is provided with a rear wall surface and a plurality of fixing grooves penetrating the rear wall surface, the fixing portions of the terminals are fixed one by one in the corresponding fixing grooves, and the pins extend backward from the rear wall surface. The electrical connector further includes a waterproof cover plate and a waterproof rubber plate, the waterproof cover plate covers the pins of the corresponding first terminal group on the rear wall surface, and the waterproof rubber plate is injected and covers the pins of the corresponding second terminal group on the rear wall surface to seal the gap between the second terminal group and its corresponding fixing groove. The rear wall surface of the electrical connector of the present invention is provided with a waterproof cover plate and a waterproof rubber plate, which can seal different types of terminal pins to achieve a good waterproof function.

Description

Technical field

[0001] The invention relates to an electric connector with a waterproof function. [Background Technology]

[0002] Chinese invention patent No. CN207925721U discloses a power connector comprising an insulating body and terminals mounted on the insulating body. The insulating body is provided with a columnar bearing portion and an annular receiving groove located outside the bearing portion. The bearing portion has a mating surface and is provided with a longitudinal power terminal groove and a pinhole-shaped signal terminal groove. The signal terminal grooves are located on both sides of the power terminal groove. The terminals include a power terminal located within the power terminal groove and a signal terminal located within the signal terminal groove. The power connector has a simple structure and good electrical performance, but water easily accumulates inside the connector, and the waterproof effect is poor.

[0003] Therefore, it is hoped to design an improved electrical connector to overcome the above-mentioned defects. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide an electrical connector which can improve the waterproof effect.

[0005] To solve the above problems, the present invention can adopt the following technical solutions: an electrical connector, comprising a body and a plurality of terminals mounted on the body, the terminals comprising a first terminal group and a second terminal group, each terminal comprising a fixing portion for fixing to the body, a contact portion extending forward from the fixing portion, and a pin extending backward from the fixing portion, the body being provided with a rear wall surface and a plurality of fixing grooves penetrating the rear wall surface, the fixing portions of the terminals being fixed one by one in the corresponding fixing grooves, and the pins extending backward from the rear wall surface; the electrical connector further comprising a waterproof cover plate and a waterproof rubber plate, the waterproof cover plate covering the pins of the first terminal group corresponding to the rear wall surface; the waterproof rubber plate being injected into and covering the pins of the second terminal group corresponding to the rear wall surface to seal the gap between the second terminal group and its corresponding fixing groove.

[0006] Compared with the prior art, the rear wall of the electrical connector of the present invention is provided with a waterproof cover plate and a waterproof rubber plate, which can seal different types of terminal pins and achieve good waterproof function.

Brief Description of the Drawings

[0007] Figure 1 It is a three-dimensional diagram of the electrical connector of the present invention.

[0008] Figure 2 yes Figure 1 A three-dimensional image from another angle.

[0009] Figure 3 yes Figure 2A three-dimensional image with the waterproof rubber sheet removed.

[0010] Figure 4 yes Figure 3 A perspective view of an electrical connector with a portion cut away.

[0011] Figure 5 yes Figure 4 Enlarged view of the circled portion.

[0012] Figure 6 yes Figure 2 Cross-section along dotted line AA.

[0013] Figure 7 yes Figure 2 Cross-section along dotted line BB.

[0014] Figure 8 It is a three-dimensional exploded view of the electrical connector of the present invention, wherein the waterproof cover plate and the waterproof rubber plate are not shown.

[0015] Figure 9 yes Figure 8 Exploded three-dimensional diagram from another angle.

[0016] Figure 10 It is a three-dimensional diagram of the waterproof cover.

[0017]

Component Symbol Description

[0018] Electrical connector 100 accommodating cavity 15 fitting portion 222

[0019] Main body 10 Recessed area 16 Pin 23

[0020] Front wall 101 Partition wall 161 First terminal group 20P

[0021] Rear wall 102 Front flange 17 Second terminal group 20S

[0022] Front wall ring 11 Recessed hole 171 Terminal pieces 201, 202

[0023] Docking column 12 Bolt 18 Terminal strips 203, 204

[0024] Terminal slot 121 Terminal 20 Waterproof cover 30

[0025] Fixing groove 122 Fixing portion 21 Notch 31

[0026] Rear wall ring 13 contact portion 22 waterproof rubber sheet 40

[0027] Ring groove 14 Elastic arm 221 First distance L

[0028] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. [Specific implementation method]

[0029] Ginseng Figures 1 to 10 As shown, the present invention discloses an electrical connector 100 for transmitting power and signals.

[0030] Specific reference Figure 8-10 As shown, the electrical connector 100 includes a body 10, terminals 20 installed on the body, and a waterproof structure. The body 10 is made of insulating material, and the terminals 20 are made of conductive metal material. The terminal structures are roughly the same. Each terminal 20 includes a fixing portion 21 for fixing to the body, a contact portion 22 extending forward from the fixing portion, and a pin 23 extending backward from the fixing portion. The terminals 20 include a first terminal group 20P and a second terminal group 20S. The first terminal group is a power terminal, and the second terminal group is a signal terminal. The size of the power terminal is larger than that of the signal terminal, so that it can transmit large currents. The second terminal group 20S includes a plurality of terminals arranged in a row. The first terminal group includes a plurality of terminals and is located on the outer side of the second terminal group. As can be seen from the figures, in this embodiment, the terminals include three first terminal groups and two second terminal groups. Each second terminal group 20S includes a plurality of terminals arranged in a row, with the two second terminal groups 20S spaced apart from each other. Each signal terminal comprises two independent terminal pieces 201 and 202, which are symmetrically arranged face-to-face, with the fixed portion and contact portion spaced apart, and the pins abutting against each other for connection to an external circuit board or cable. The first terminal group 20P includes three power terminals and is located on the periphery of the signal terminals. Each power terminal comprises two independent terminal pieces 203 and 204, with the contact portion, fixed portion, and pins spaced apart from each other. Each contact portion includes two elastic arms 221 extending from the fixed portion, with the two elastic arms spaced apart along the mating direction. The elastic arms of the terminal pieces 203 and 204 of each power terminal face each other, but their lengths complement each other. The body is provided with a front flange 17, and a pair of bolts 18 are secured from back to front within recesses 171 provided in the front flange 17 for securing to the mating connector. Here, the front side is opposite to the docking connector, and the rear side is opposite to the docking connector.

[0031] Combine Figure 4 The body 10 includes a front wall ring 11, a docking post 12 located inside the front wall ring 11, and a rear wall ring 13. A ring groove 14 is formed between the front wall ring 11 and the docking post 12, and a receiving cavity 15 is formed inside the rear wall ring 13. The body 10 is provided with a front wall surface 101 and a rear wall surface 102 opposite to each other. The docking post 12 is provided with a terminal groove 121 that passes through the front and rear walls, and a fixing groove 122 that is fixed to the fixing portion 21 one by one. Figure 7As shown, the fixing groove 122 extends rearward through the rear wall 102. The fixing portion 21, through its barbs, forms a hard interference fit with the fixing groove 122, thereby securing the terminal within the body 10. The contact portion 22 is received within the terminal groove 121 and can be offset. The rear wall 102 and the rear wall ring 13 form the aforementioned receiving cavity 15. The terminal pin 23 extends rearward from the rear wall 102 and passes through the receiving cavity 15.

[0032] Combine Figure 2-5 , the electrical connector 100 is further provided with a waterproof cover plate 30 and a waterproof rubber plate 40. The waterproof cover plate 30 covers the pin 23 of the first terminal group 20P corresponding to the rear wall surface 102. The waterproof rubber plate is injected and covers the pin 23 of the second terminal group 20S corresponding to the rear wall surface 102 to seal the gap between the second terminal group 20S and its corresponding fixing groove 122. The first terminal group 20P is located on the periphery of the second terminal group 20S. The waterproof cover plate 30 has a notch 31 for the pin 23 of the second terminal group 20S to pass through. The waterproof cover plate 30 is first installed in the accommodating cavity 15, and then glue is injected to form the waterproof rubber plate 40. Under the premise of meeting the waterproof function, it helps to enhance the holding force between the waterproof cover plate and the waterproof rubber plate and the holding force between the two and the rear wall surface 102. The rear wall surface 102 of the main body is provided with a recessed area 16, which surrounds the second terminal group, and the pin 23 of the second terminal group passes through the recessed area 16. Combined Figure 4-7 In the recessed area, adjacent signal terminals are formed with partition walls 161 extending from the recessed portion 16. The partition walls 161 are higher than the side rear wall 102. The signal terminals include a fitting portion 222 extending from the fixing portion 21, and the pins extend from the fitting portion 222. Glue is injected from the position between the two rows of signal terminals, as shown in FIG. Figure 5 As shown by the middle arrow, the waterproof rubber sheet 40 is formed after cooling. The fixing groove 122 extends backward through the rear wall surface, and the glue just overflows into the fixing groove 122, thereby sealing the gap and achieving a waterproof effect. There is a first distance L between the top surface of the fitting portion 222 and the top surface of the partition wall 161. The first distance is greater than 0.5 mm to ensure that the glue does not penetrate into the functional contact area, such as Figure 6 shown.

[0033] In other embodiments, the body is provided with a drainage hole at the contact portion 22 of the power terminal connected to the first terminal group 20P. The drainage hole is located in front of the front wall of the body and can realize the drainage function for the power terminal.

[0034] The above embodiments are preferred embodiments of the present invention, but not all embodiments. Any equivalent changes made to the technical solution of the present invention by those skilled in the art after reading the present specification are covered by the claims of the present invention.

Claims

1. An electrical connector comprising a body and a plurality of terminals mounted on the body, the terminals comprising a first terminal group and a second terminal group, each terminal comprising a fixing portion for fixing to the body, a contact portion extending forward from the fixing portion, and a pin extending rearward from the fixing portion. The body has a rear wall and a plurality of fixing slots extending through the rear wall, the fixing portions of the terminals being fixed one by one in corresponding fixing slots, and the pins extending rearward from the rear wall. Characterized by: The electrical connector further includes a waterproof cover plate and a waterproof rubber plate. The waterproof cover plate covers the pins of the first terminal group corresponding to the rear wall surface; waterproof glue is injected and covered on the pins of the second terminal group corresponding to the rear wall surface to form a waterproof rubber plate to seal the gap between the second terminal group and its corresponding fixing groove. The second terminal group includes a plurality of terminals arranged in a row, and the first terminal group includes a plurality of terminals and is located on the outer side of the second terminal group. The waterproof cover plate has a notch for the pins of the second terminal group to pass through. The rear wall surface of the body is provided with a recessed area, and the pins of the second terminal group pass through the recessed area. The waterproof rubber plate is formed by injecting waterproof glue into the recessed area and then cooling it.

2. The electrical connector according to claim 1, wherein: The first terminal group is a power terminal, the second terminal group is a signal terminal, and the size of the power terminal is larger than that of the signal terminal.

3. The electrical connector according to claim 1, wherein: The second terminal group includes two rows of signal terminals. Adjacent signal terminals in the same row are formed with partition walls protruding from the recessed area. The partition walls are higher than the side rear wall surfaces.

4. The electrical connector according to claim 3, wherein: The signal terminal includes a fitting portion bent and extended from the fixing portion, the pin is bent and extended from the fitting portion, the fitting portion is fitted to the inner bottom surface of the recessed area, and there is a first distance between the top surface of the fitting portion and the top surface of the partition wall, and the first distance is greater than 0.5 mm.

5. The electrical connector according to claim 1, wherein: The fixing portion of each terminal in the second terminal group is hard-interference-fitted with the fixing slot.

6. The electrical connector according to claim 1, wherein: The body is provided with a drainage hole at a contact portion of the terminal communicating with the first terminal group, and the drainage hole is located in front of the front wall surface of the body.

7. The electrical connector according to claim 1, wherein: The main body includes a front wall ring, a docking column located inside the front wall ring, and a rear wall ring. A ring groove is formed between the front wall ring and the docking column. The docking column is provided with a terminal groove connected one-to-one with the fixing groove, and the contact part is accommodated in the terminal groove; the waterproof cover plate and the waterproof rubber plate are located in the accommodating cavity limited by the rear wall ring and the rear wall surface.

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