A waterproof connector for a microcircular printed circuit

Abstract

This utility model relates to a miniature circular printed circuit waterproof connector, including a plug and a socket. One end of the plug has a first slot into which a cable is inserted. At the bottom of the first slot is a rectangular pin base with multiple rows of pin holes arranged sequentially. Twisted pins are inserted into the pin holes. A pad is fitted onto the cable and is pressed against the end of the plug by a pressure sleeve. A first sealing gasket is provided at the contact point between the pad and the pressure sleeve. One end of the socket has a second slot with a mounting plate at the bottom. A bent insertion hole is provided on the mounting plate. The plug is inserted into the second slot and abuts against the bottom of the slot. A rounded keyway is formed on the inner wall of the second slot, and a main key is provided on the outer wall of the plug to engage with the rounded keyway. A second sealing gasket is provided at the contact point between the plug and the second slot. The advantages of this utility model are: short overall length and small size, meeting the needs of use in confined spaces, and stable waterproof performance.

Description

Technical Field

[0001] This utility model belongs to the field of electrical connector technology, specifically relating to a micro-miniature circular printed circuit waterproof connector. Background Technology

[0002] Printed circuit connectors are mainly used for the transmission of circuits between printed circuit boards. They are connectors that enable circuit connection or disconnection, and mainly transmit current and signals by mating sockets and plugs.

[0003] When a plug and socket are inserted, the key on the plug and the key slot on the socket align and engage, thus achieving insertion and positioning through the key and key slot. For example... Figure 1 As shown, in traditional circular printed circuit connectors, the contacts on the plug are typically arranged in a ring. Combined with the need to accommodate the main key and keyway, this results in a relatively large cross-sectional diameter for both the plug and socket. Furthermore, an external tail cover is required at the plug's tail for sealing, further increasing the overall length and thus the connector's overall size. With the miniaturization and weight reduction of electronic components, traditional circular printed circuit connectors can no longer meet the demands of applications in confined spaces. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a micro-sized circular printed circuit waterproof connector with a short overall length and small size, which can meet the needs of use in confined spaces and has stable waterproof performance.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A miniature circular printed circuit waterproof connector includes a plug and a socket. One end of the plug has a first slot into which a cable is inserted. At the bottom of the first slot is a rectangular pin base with multiple rows of pin holes. Twisted pins are inserted into the pin holes and connected to the cable wires one-to-one. A pad is fitted onto the cable and inserted into the first slot, then pressed against the plug end by a compression sleeve. A first sealing gasket is provided at the contact point between the pad and the compression sleeve. One end of the socket has a second slot with a mounting plate at its bottom. Bent-type insertion holes corresponding to the twisted pins are provided on the mounting plate. The end of the plug opposite to the first slot is inserted into the second slot and abuts against the bottom of the slot. A rounded keyway is formed on the inner wall of the second slot, and a main key is formed on the outer wall of the plug to engage with the rounded keyway. When the plug is inserted into the second slot, the bent-type insertion holes are inserted into the pin holes and engage with the corresponding pins. A second sealing gasket is provided at the contact point between the plug and the second slot. The plug is locked to the socket by a connecting ring.

[0007] Furthermore, the plug has a first through hole at the end opposite to the first slot that communicates with the first slot, and the pin base is located in the first through hole and abuts against the bottom of the first slot.

[0008] Furthermore, a metal sleeve is provided inside the pin hole, one end of which is inserted into the pin, and the other end of which extends out of the pin hole and is crimped to the wire of the cable.

[0009] Furthermore, epoxy resin and silicone rubber sealant are sequentially filled between the pin base and the pad, and the epoxy resin wraps around the metal sleeve.

[0010] Furthermore, a sealing ring is provided between the pad and the inner wall of the first slot.

[0011] Furthermore, one end of the compression sleeve is fitted onto the cable, and the other end of the compression sleeve is threaded into the plug.

[0012] Furthermore, a first ring platform is provided on the outer wall of the plug opposite to the pressure sleeve. One end of the connecting ring is sleeved on the plug between the first ring platform and the pressure sleeve, and the other end of the connecting ring is threaded into the socket.

[0013] Furthermore, the socket has a countersunk hole at the end opposite to the second slot, and a second through hole communicating with the second slot is provided at the bottom of the countersunk hole. The mounting plate is placed in the second through hole and abuts against the bottom of the countersunk hole.

[0014] Furthermore, a second ring platform is provided on the outer wall of the socket at the second through hole, and a mounting nut is threaded onto one end of the socket at the countersunk hole. A third sealing gasket is fitted on the socket between the mounting nut and the second ring platform.

[0015] Furthermore, the outer wall of the socket located at the countersunk hole is symmetrically provided with mounting positioning surfaces.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By arranging the twisted pins in multiple rows, this utility model, compared with the traditional ring distribution method, can leave more key positions while meeting the printed circuit requirements of the socket, so that the cross-sectional diameter of the connector of this utility model can be about 2mm smaller than that of the traditional connector.

[0018] 2. By setting the rounded corners on the main key, this utility model eliminates the key insertion process during processing compared to the right-angle design inside the traditional circular connector, thus reducing a significant amount of processing time and cost.

[0019] 3. By reducing the tail cover on traditional connectors and adding a gasket, a first sealing gasket, and a second sealing gasket, this utility model reduces the length of the connector by at least 30% compared to traditional waterproof connectors while ensuring sealing performance.

[0020] 4. The socket of this utility model uses two mounting and positioning surfaces, which effectively improves the installation accuracy of the socket. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the contact distribution on the plug of a traditional circular printed circuit connector.

[0022] Figure 2 This is a schematic diagram of the plug and socket connection in this utility model;

[0023] Figure 3 This is a schematic diagram of the external structure of the plug in this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the plug in this utility model;

[0025] Figure 5 This is a schematic diagram of the external structure of the socket in this utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the socket in this utility model;

[0027] Figure 7 This is a side view of the socket structure in this utility model.

[0028] In the diagram: 1. Plug; 2. Socket; 3. Cable; 4. Pin base; 5. Twisted pin; 6. Gasket; 7. Pressure sleeve; 8. First sealing gasket; 9. Mounting plate; 10. Bent socket; 11. Second sealing gasket; 12. Connecting ring; 13. Metal sleeve; 14. Epoxy resin; 15. Silicone rubber sealant; 16. Sealing ring; 17. First ring platform; 18. Second ring platform; 19. Mounting nut; 20. Third sealing gasket; 21. Mounting positioning surface; 22. Pin hole; 23. Arc-shaped rounded corner keyway; 24. Main key; 25. Second slot. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0030] like Figures 2-6As shown, a miniature circular printed circuit waterproof connector includes a plug 1 and a socket 2. One end of the plug 1 has a first slot into which a cable 3 is inserted. A pin base 4 is located at the bottom of the first slot, and the pin base 4 has multiple pin holes 22. Twisted pins 5 are installed in the pin holes 22, and each twisted pin 5 is connected to a corresponding wire of the cable 3. A pad 6 is fitted onto the cable 3. The pad 6 is inserted into the first slot and pressed against the end of the plug 1 by a pressure sleeve 7. A first sealing gasket 8 is provided at the contact point between the pad 6 and the pressure sleeve 7. One end of the socket 2 has a second slot 25. A mounting plate 9 is provided at the bottom of the slot. A bent insertion hole 10 corresponding to the twisted pin 5 is provided on the mounting plate 9. The end of the plug 1 opposite to the first slot is inserted into the second slot 25 and abuts against the bottom of the second slot 25. A rounded keyway 23 is provided on the inner wall of the second slot 25. A main key 24 that is inserted into the rounded keyway 23 is provided on the outer wall of the plug 1. When the plug 1 is inserted into the second slot 25, the bent insertion hole 10 is inserted into the pin hole 22 and is inserted into the corresponding pin. A second sealing gasket 11 is provided at the abutment of the plug 1 and the second slot 25. The plug 1 is locked to the socket 2 by the connecting ring 12.

[0031] like Figure 3 , Figure 5 As shown, the cross-section of the pin base 4 is rectangular, and the multiple pin holes 22 are arranged in multiple rows, so that the twisted pins are also arranged in multiple rows, relative to... Figure 1 The ring-shaped distribution in the connector allows for more space between the main key 24 and the pin hole 22, which allows the position of the main key 24 to be moved further towards the center of the plug 1, thereby reducing the cross-sectional diameter of the plug 1. Correspondingly, the position of the rounded keyway 23 can also be moved further towards the center of the socket 2, reducing the cross-sectional diameter of the socket 2 as well. Ultimately, this reduces the overall cross-section of the connector and thus the overall volume of the connector.

[0032] like Figure 5 As shown, the rounded corner keyway 23, through the design of the rounded corners, reduces the key insertion process during processing compared to the right-angle design of the keyway in the traditional circular connector, thus reducing a significant amount of processing time and cost.

[0033] like Figure 2 , Figure 4 As shown, a first through hole communicating with the first slot is provided at the end of the plug 1 opposite to the first slot. The pin base 4 is located in the first through hole, and a metal sleeve 13 is provided in the pin hole 22. One end of the metal sleeve 13 is inserted into the pin, and the other end of the metal sleeve 13 extends out of the pin hole 22 and is crimped to the wire of the cable 3. Epoxy resin 14 and silicone rubber sealant 15 are sequentially filled between the pin base 4 and the pad 6. The epoxy resin 14 wraps around the metal sleeve 13. Through the filling of epoxy resin 14 and silicone rubber sealant 15, the pin base 4 abuts against the bottom of the first slot, and the metal sleeve 13 and the cable 3 are fixed.

[0034] like Figure 2 , Figure 4 As shown, a sealing ring 16 is provided between the pad 6 and the inner wall of the first slot. One end of the pressure sleeve 7 is sleeved on the cable 3, and the other end of the pressure sleeve 7 is threaded into the plug 1. Tightening the pressure sleeve 7 onto the plug 1 causes the pressure sleeve 7 and the pad 6 to press the first sealing gasket 8 together, while simultaneously pressing the pad 6 against the end of the plug 1. The sealing ring 16 is used to seal the space between the pad 6 and the inner wall of the first slot.

[0035] like Figure 2 As shown, the internal and external sealing of the connector can be achieved by setting the gasket 6, the first sealing gasket 8, the second sealing gasket 11, the pressure sleeve 7 and the sealing ring 16, thereby ensuring the sealing performance of the connector; by using the gasket 6 and the pressure sleeve 7 to replace the tail cover on the traditional connector, the length of the connector can be reduced, thereby reducing the overall length of the connector.

[0036] like Figure 2 , Figure 4 As shown, a first ring platform 17 is provided on the outer wall of the end of the plug 1 opposite to the pressure sleeve 7. The first ring platform is integrally formed with the plug 1. One end of the connecting ring 12 is sleeved on the plug 1 between the first ring platform 17 and the pressure sleeve 7, and the other end of the connecting ring 12 is threadedly connected to the socket 2. After the plug 1 and the socket 2 are inserted, the connecting ring 12 is tightened, so that the plug 1 and the bottom of the second slot 25 are tightly pressed and the second sealing gasket 11 is squeezed, thereby locking the plug 1 onto the socket 2.

[0037] like Figure 2 , Figure 6 As shown, a countersunk hole is provided at one end of the socket 2 opposite to the second slot 25. A second through hole communicating with the second slot 25 is provided at the bottom of the countersunk hole. The mounting plate 9 is located in the second through hole and abuts against the bottom of the countersunk hole.

[0038] like Figure 6 , Figure 7 As shown, a second annular platform 18 is provided on the outer wall of the socket 2 at the second through hole. The second annular platform 18 is integrally formed with the socket 2. A mounting nut 19 is threaded onto one end of the socket 2 at the countersunk hole. A third sealing gasket 20 is fitted on the socket 2 between the mounting nut 19 and the second annular platform 18. When installing the socket 2 on an external device, the end of the socket 2 at the countersunk hole is passed through the mounting hole on the external device, and then the third sealing gasket 20 and the mounting nut 19 are fitted in sequence. Finally, the mounting nut 19 is tightened to make the second annular platform 18 fit tightly against the external device. In addition, mounting positioning surfaces 21 are symmetrically provided on the outer wall of the end of the socket 2 at the countersunk hole, which can ensure the installation accuracy of the socket 2 during installation.

[0039] Based on the above structural design, the connector of this utility model has a cross-sectional diameter that is about 2mm smaller and a length that is 30% smaller than that of traditional connectors, thus meeting the miniaturization requirements of connectors.

[0040] Finally, although embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniature circular printed circuit waterproof connector, comprising a plug (1) and a socket (2), characterized in that: The plug (1) has a first slot at one end, into which a cable (3) is inserted. At the bottom of the first slot, there is a pin base (4) with a rectangular cross-section. The pin base (4) has multiple rows of pin holes (22) arranged sequentially. Twisted pins (5) are provided in the pin holes (22). The twisted pins (5) are connected to the wires of the cable (3) one by one. A pad (6) is fitted on the cable (3). The pad (6) is inserted into the first slot and pressed against the end of the plug (1) by a pressure sleeve (7). A first sealing gasket (8) is provided at the crimping point of the pad (6) and the pressure sleeve (7). The socket (2) has a second slot (25) at one end, and a mounting plate (9) is provided at the bottom of the second slot (25). The mounting plate (9) is provided with bent sockets (10) that correspond one-to-one with the twisted pins (5). The end of the plug (1) opposite to the first slot is inserted into the second slot (25) and abuts against the bottom of the second slot (25). The inner wall of the second slot (25) is provided with a rounded keyway (23). The outer wall of the plug (1) is provided with a main key (24) that engages with the rounded keyway (23). When the plug (1) is inserted into the second slot (25), the bent sockets (10) are inserted into the pin holes (22) and engage with the corresponding pins. The abutment of the plug (1) and the second slot (25) is provided with a second sealing gasket (11). The plug (1) is locked onto the socket (2) by a connecting ring (12).

2. The micro-miniature circular printed circuit waterproof connector according to claim 1, characterized in that: The plug (1) has a first through hole at the end opposite to the first slot, which communicates with the first slot. The pin base (4) is located in the first through hole and abuts against the bottom of the first slot.

3. The micro-miniature circular printed circuit waterproof connector according to claim 1, characterized in that: A metal sleeve (13) is provided inside the pin hole (22). One end of the metal sleeve (13) is inserted into the pin, and the other end of the metal sleeve (13) extends out of the pin hole (22) and is crimped with the wire of the cable (3).

4. The micro-miniature circular printed circuit waterproof connector according to claim 3, characterized in that: Epoxy resin (14) and silicone rubber sealant (15) are sequentially filled between the pin base (4) and the pad (6), and the epoxy resin (14) wraps the metal sleeve (13).

5. The micro-miniature circular printed circuit waterproof connector according to claim 1, characterized in that: A sealing ring (16) is provided between the pad (6) and the inner wall of the first slot.

6. The micro-miniature circular printed circuit waterproof connector according to claim 2, characterized in that: One end of the compression sleeve (7) is fitted onto the cable (3), and the other end of the compression sleeve (7) is threaded into the plug (1).

7. The micro-miniature circular printed circuit waterproof connector according to claim 1, characterized in that: The outer wall of the plug (1) opposite to the pressure sleeve (7) is provided with a first ring platform (17). One end of the connecting ring (12) is sleeved on the plug (1) between the first ring platform (17) and the pressure sleeve (7), and the other end of the connecting ring (12) is threaded into the socket (2).

8. The micro-miniature circular printed circuit waterproof connector according to claim 1, characterized in that: The socket (2) has a countersunk hole at one end opposite to the second slot (25). The bottom of the countersunk hole has a second through hole that communicates with the second slot (25). The mounting plate (9) is located in the second through hole and abuts against the bottom of the countersunk hole.

9. The micro-miniature circular printed circuit waterproof connector according to claim 1, characterized in that: The outer wall of the socket (2) is provided with a second ring platform (18) at the second through hole. One end of the socket (2) at the countersunk hole is threaded with an installation nut (19). A third sealing gasket (20) is provided on the socket (2) between the installation nut (19) and the second ring platform (18).

10. The micro-miniature circular printed circuit waterproof connector according to claim 1, characterized in that: The socket (2) has symmetrical mounting and positioning surfaces (21) on the outer wall of one end located at the countersunk hole.

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