Board-to-board connector

Abstract

The utility model discloses a board to board connector, including mutually cooperate's socket connector and plug connector, socket connector is equipped with socket body and hold in socket body's socket terminal, socket body is equipped with island part, two side parts of island part lateral both sides and two end parts of connection in side part longitudinal both ends, two side parts and two end parts surround and form socket slot. Plug connector includes plug body and holds in plug body's plug terminal, and plug body is equipped with two side walls and two end walls of connection in two side walls longitudinal both sides, and two side walls and two end walls surround and form plug slot. The plug slot is along the vertical through -going, and when plug connector is inserted to socket connector, plug body is accommodated in socket slot, and island part is inserted to plug slot and the top surface of island part and the bottom surface of plug body are located in the same plane, to reduce the mutual matching height of board to board connector to 0.4mm, thereby has reduced overall height.

Description

Technical Field

[0001] This utility model relates to the field of board-to-board connector technology, and in particular to a miniaturized board-to-board connector. Background Technology

[0002] Board-to-board connectors (BTB) are commonly used connectors in electronic devices (such as mobile phones and tablets). Their function is to enable mechanical and electrical interconnection between the motherboard and various modules (such as display modules, touch modules, and camera modules). A BTB connector typically consists of two parts: a plug and a socket. Both the plug and socket are composed of a plastic body and conductive terminals held in place by the plastic body. The plastic body primarily serves to insulate and position the conductive terminals, while the conductive terminals primarily conduct electricity. To make more efficient use of the limited space on the product's substrate, the requirements for further thinning and miniaturization of mounting components are increasing, leading to a growing demand and challenge for miniature BTB connectors. Existing BTB connectors have relatively low plug insertion depths into the sockets, small mating gaps between the conductive terminals, and short scraping strokes between the conductive terminals.

[0003] Therefore, it is hoped that a new board-to-board connector can be proposed to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of this utility model is to provide a board-to-board connector with an overall height reduced to 0.4mm, which is conducive to the miniaturization trend of electronic products.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a board-to-board connector, comprising a socket connector and a plug connector that cooperate with each other. The socket connector has a longitudinally elongated socket body and several socket terminals fixed within the socket body. The socket body has a longitudinally extending island, two side portions located on both sides of the island, and two end portions connected to the longitudinal ends of the two side portions. The two side portions and the two end portions together form a socket slot. The plug connector includes a longitudinally elongated plug body and several plug terminals fixed within the plug body. The plug body has two longitudinally extending side walls and two end walls connected to the longitudinal ends of the two side walls. The two side walls and the two end walls together form a plug slot. The plug slot extends vertically through the plug body. When the plug connector is inserted into the socket connector, the plug terminals contact the socket terminals, the plug body is received within the socket slot, and the island portion is inserted into the plug slot, with the top surface of the island portion and the bottom surface of the plug body located in the same plane.

[0006] In a preferred embodiment, the plug terminal is provided with an inverted U-shaped contact portion fixed on the side wall. The inverted U-shaped contact portion is provided with an outer wall contact portion located on the outer wall surface of the side wall, an inner wall contact portion located on the inner wall surface of the side wall, and a connecting portion connecting the outer wall contact portion and the inner wall contact portion. The connecting portion spans the top of the side wall.

[0007] In a preferred embodiment, the plug terminal is provided with a welding tab that bends outward from the bottom end of the outer wall contact portion, and the thickness of the welding tab is less than the thickness of the inverted U-shaped contact portion.

[0008] In a preferred embodiment, the socket terminal has an upright U-shaped portion and an inverted U-shaped portion connected to the upright U-shaped portion, the upright U-shaped portion contacts the inverted U-shaped contact portion of the plug terminal, and the inverted U-shaped portion is fixed to the side portion.

[0009] In a preferred embodiment, the upright U-shaped portion is provided with a first leg adjacent to the side portion and a second leg adjacent to the island portion, the bottom of the first leg and the bottom of the second leg being connected; when the plug connector is inserted into the socket connector, the outer wall contact portion abuts against the first leg, and the inner wall contact portion abuts against the second leg.

[0010] In a preferred embodiment, the first leg is provided with a first elastic contact portion that protrudes into the socket slot, and the outer wall contact portion is provided with an outwardly protruding protrusion. When the plug connector is inserted into the socket connector, the first elastic contact portion of the socket terminal is engaged with the protrusion of the plug terminal.

[0011] In a preferred embodiment, the second leg is provided with a second elastic contact portion that protrudes into the socket slot. The inner wall contact portion has a smooth contact surface. During the process of the plug connector being inserted into the socket connector, the second elastic contact portion scrapes the contact surface of the inner wall contact portion, and the scraping stroke of the second elastic contact portion is 0.09 mm.

[0012] In a preferred embodiment, the inverted U-shaped portion and the upright U-shaped portion share the first support leg, and the inverted U-shaped portion is provided with an assembly portion fixed in the side portion and a welding portion connected to the bottom of the assembly portion. The top of the assembly portion is connected to the top of the first support leg, and the welding portion extends laterally outward from the socket body.

[0013] In a preferred embodiment, the radius of the radius of the R-angle at the connection between the outer wall contact portion and the connecting portion is 0.08 mm, and the radius of the radius of the R-angle at the connection between the inner wall contact portion and the connecting portion is 0.07 mm.

[0014] In a preferred embodiment, after the plug connector mates with the socket connector, the distance between the bottom surface of the plug connector and the bottom surface of the socket connector is equal to 0.4 mm.

[0015] Compared with the prior art, this utility model has the following beneficial effects: the plug slot extends vertically through the plug body; when the plug connector is inserted into the socket connector, the plug terminals contact the socket terminals; the plug body is housed in the socket slot; the island portion is inserted into the plug slot, and the top surface of the island portion and the bottom surface of the plug body are on the same plane. By hollowing out the plastic portion in the middle of the plug body, the insertion space of the island portion of the socket body is increased, thereby reducing the mating height of the board-to-board connector to 0.4mm, thus reducing the overall height of the board-to-board connector. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the socket connector of the board-to-board connector in a preferred embodiment of the present invention.

[0017] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the socket body in the socket connector shown.

[0018] Figure 3 This is a three-dimensional schematic diagram of the plug connector of the board-to-board connector in a preferred embodiment of the present invention.

[0019] Figure 4 yes Figure 3 A three-dimensional schematic diagram of the plug body in the plug connector shown.

[0020] Figure 5 This is a cross-sectional view of the board-to-board connector in a preferred embodiment of the present invention.

[0021] Figure 6 yes Figure 5 The front view of the board-to-board connector before the socket terminals and plug terminals are mated.

[0022] Figure 7 yes Figure 6 The front view shown is after the socket terminals and plug terminals are connected. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0024] Please see Figures 1 to 7 As shown, a preferred embodiment of this utility model discloses a board-to-board connector, which helps in the miniaturization and weight reduction of equipment, improves circuit integration and performance, thereby reducing equipment cost and energy consumption, and enhancing design flexibility and compatibility. The board-to-board connector includes a mating socket connector 100 and a plug connector 200. After the plug connector 200 and the socket connector 100 are mated, the distance from the bottom surface of the plug connector 200 to the bottom surface of the socket connector 100 is equal to 0.4 mm.

[0025] Please see Figures 1 to 2 As shown, the socket connector 100 has a longitudinally elongated socket body 10, several socket terminals 20 fixed within the socket body 10, and socket protection brackets 30 located at both longitudinal ends of the socket body 10. The socket body 10 has a longitudinally extending central island 11, two side portions 12 located on both lateral sides of the island 11, and two end portions 13 connected to the longitudinal ends of the two side portions 12. The two side portions 12 and the two end portions 13 surround to form a socket slot 14, the island 11 is located within the socket slot 14, and the socket slot 14 allows the insertion of a plug connector 200.

[0026] The socket body 10 is also provided with several terminal channels 15 extending vertically through its bottom wall. Each terminal channel 15 is provided with a retaining groove 151 on the side portion 12 and a receiving groove 152 on the island portion 11. The socket terminal 20 is made by stamping and bending a conductive metal sheet and is received in the corresponding terminal channel 15.

[0027] Combination Figures 5 to 6 As shown, the socket terminal 20 has an upright U-shaped portion 21 and an inverted U-shaped portion 22 connected to the upright U-shaped portion 21, the inverted U-shaped portion 22 being fixed to the side portion 12. The upright U-shaped portion 21 has a first leg 23 adjacent to the side portion 12 and a second leg 24 adjacent to the island portion 11, and the bottoms of the first leg 23 and the second leg 24 are connected. The inverted U-shaped portion 22 shares the first leg 23 with the upright U-shaped portion 21, and the inverted U-shaped portion 22 also has an assembly portion 25 fixed in the side portion 11 and a welding portion 26 connected to the bottom of the assembly portion 25. The top of the assembly portion 25 is connected to the top of the first leg 23, and the welding portion 26 extends laterally outward from the socket body 10 for connection to a circuit board.

[0028] In this embodiment, the inverted U-shaped portion 22 is housed within the retaining groove 151, meaning the first support leg 23 and the assembly portion 25 are located within the retaining groove 151. Specifically, the first support leg 23 has a first elastic contact portion 231 protruding into the socket slot 14 for electrical contact with the plug connector 200; the assembly portion 25, through its barbed structure, interferes with and retains the inner wall of the retaining groove 151, thereby ensuring that the socket terminal 20 is stably fixed within the socket body 10.

[0029] The second leg 24 of the upright U-shaped portion 21 is received within the receiving groove 152. Specifically, the second leg 24 has a second elastic contact portion 241 protruding into the socket slot 14 and a free end 242 located at the end of the second elastic contact portion 241. The second elastic contact portion 241 is also used for electrical contact with the plug connector 200, and the free end 242 abuts against the inner wall of the receiving groove 152, which can provide a greater holding force for the plug connector 200.

[0030] The socket protection bracket 30 includes an island protection bracket 31 integrally injection-molded at the end of the island portion 11 and an end protection bracket 32 ​​assembled and fixed on the end portion 13, which are used to improve the overall strength of the socket connector 100 and ensure the passage of large current when the socket connector 100 is plugged in. The outer surface of the end protection bracket 32 ​​does not extend beyond the outer wall surface of the end portion 13 and the side portion 12, so that the end protection bracket 32 ​​increases the strength of the socket body 10 and enables the conduction of large current without increasing the overall volume of the socket connector 100.

[0031] Please see Figures 3 to 4 As shown, the plug connector 200 includes a longitudinally elongated plug body 40, a plurality of plug terminals 50 fixed on the plug body 40, and plug protection brackets 60 located at both longitudinal ends of the plug body 40. The plug body 40 has two longitudinally extending side walls 41 and two end walls 42 connected to the longitudinal sides of the two side walls 41. The two side walls 41 and the two end walls 42 together form a plug slot 43. The plug slot 43 penetrates the plug body 10 vertically and allows the island portion 11 of the socket connector 100 to be inserted.

[0032] Combination Figures 5 to 6 As shown, the plug terminal 50 has an inverted U-shaped contact portion 51 fixed to the side wall 41 and a welding piece 52 extending from one end edge of the inverted U-shaped contact portion 51 into the plug body 40. The welding piece 52 is used to mate with another circuit board. Meanwhile, the thickness of the welding piece 52 is less than the thickness of the inverted U-shaped contact portion 51. In this embodiment, the welding piece 52 is thinned using a thinning process, and its thickness is 0.02 mm to provide a safe gap for engagement when the board-to-board connector is mated.

[0033] The inverted U-shaped contact portion 51 includes an outer wall contact portion 53 located on the outer wall surface of the side wall 41, an inner wall contact portion 54 located on the inner wall surface of the side wall 41, and a connecting portion 55 connecting the outer wall contact portion 53 and the inner wall contact portion 54. The connecting portion 55 spans the top of the side wall 41, and the welding piece 52 is formed by bending outward from the bottom end of the outer wall contact portion 53. In this embodiment, the outer wall contact portion 53 has an outwardly protruding protrusion 531, and the inner wall contact portion 54 has a smooth contact surface.

[0034] The protective bracket 60 is made of metal parts by drawing and integrally injection molded onto the end wall 42 of the plug body 40, thereby improving the strength of the plug body 40 while avoiding damage to the plug body 40 when the plug connector 200 is inserted or removed.

[0035] Combination Figure 7 As shown, when the plug connector 200 is inserted into the socket connector 100, the plug body 40 is received within the socket slot 14, and the island portion 11 is inserted into the plug slot 43. Since the plug slot 43 vertically penetrates the plug body 40, meaning the plug body 40 only has side walls 41 and end walls 42 but no bottom wall, the top surface of the island portion 11 and the bottom surface of the plug body 40 are located in the same plane. By hollowing out the plastic in the middle of the plug body 40, the insertion space of the island portion 11 of the socket body 10 is increased, thereby reducing the mating height of the board-to-board connector to 0.4mm, and thus lowering the overall height of the board-to-board connector.

[0036] Simultaneously, when the plug connector 200 is inserted into the socket connector 100, the plug terminal 50 contacts the socket terminal 20, that is, the upright U-shaped portion 21 of the socket terminal 20 contacts the inverted U-shaped contact portion 51 of the plug terminal 50. Specifically, the outer wall contact portion 53 of the plug terminal 50 abuts against the first leg 23 of the socket terminal 20, and the inner wall contact portion 54 of the plug terminal 50 abuts against the second leg 24 of the socket terminal 20.

[0037] Furthermore, when the plug connector 200 is inserted into the socket connector 100, the first elastic contact portion 231 of the socket terminal 20 is engaged with the protrusion 531 of the plug terminal 50, and the first elastic contact portion 231 and the protrusion 531 are engaged by hard interference. In this embodiment, the radius of the R-angle at the connection between the outer wall contact portion 53 and the connecting portion 55 is 0.08 mm, and the radius of the R-angle at the connection between the inner wall contact portion 24 and the connecting portion 55 is 0.07 mm. By reducing the radius of the R-angle at the above-mentioned connection, a gap exists between the first elastic contact portion 231 and the protrusion 531, so as to facilitate the hard interference engagement between the plug terminal 50 and the socket terminal 20.

[0038] Meanwhile, since the inner wall contact portion 54 has a smooth contact surface, during the process of the plug connector 200 being inserted into the socket connector 100, the second elastic contact portion 241 scrapes the contact surface of the inner wall contact portion 54, and the scraping stroke of the second elastic contact portion 241 is 0.09mm. This utility model ensures a safe margin for contact between terminals by adjusting the bending structure of the second leg 24 of the socket terminal 20; and the interference amount of the second elastic contact portion 24 during the scraping process is 0.05mm.

[0039] In this invention, the plug slot 43 extends vertically through the plug body 40. When the plug connector 200 is inserted into the socket connector 100, the plug terminal 50 contacts the socket terminal 20. The plug body 40 is housed within the socket slot 14, and the island portion 11 is inserted into the plug slot 43, with the top surface of the island portion 11 and the bottom surface of the plug body 40 lying on the same plane. By hollowing out the plastic portion in the middle of the plug body 40, the insertion space of the island portion 11 of the socket body 10 is increased, thereby reducing the mating height of the board-to-board connector to 0.4mm, and thus lowering the overall height of the board-to-board connector.

[0040] In summary, the above are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of the present utility model should still fall within the scope of the present utility model patent.

Claims

1. A board-to-board connector, comprising a socket connector and a plug connector that mate with each other, wherein the socket connector has an elongated socket body and a plurality of socket terminals fixed within the socket body, the socket body having a longitudinally extending island portion, two side portions located on both lateral sides of the island portion, and two end portions connected to the longitudinal ends of the two side portions, the two side portions and the two end portions forming a socket slot; the plug connector comprises an elongated plug body and a plurality of plug terminals fixed on the plug body, the plug body having two longitudinally extending side walls and two end walls connected to the longitudinal sides of the two side walls, the two side walls and the two end walls together forming a plug slot; characterized in that: The plug slot extends vertically through the plug body. When the plug connector is inserted into the socket connector, the plug terminal contacts the socket terminal. The plug body is housed in the socket slot. The island portion is inserted into the plug slot, and the top surface of the island portion and the bottom surface of the plug body are located in the same plane.

2. The board-to-board connector as described in claim 1, characterized in that: The plug terminal is provided with an inverted U-shaped contact portion fixed on the side wall. The inverted U-shaped contact portion is provided with an outer wall contact portion located on the outer wall surface of the side wall, an inner wall contact portion located on the inner wall surface of the side wall, and a connecting portion connecting the outer wall contact portion and the inner wall contact portion. The connecting portion spans the top of the side wall.

3. The board-to-board connector as described in claim 2, characterized in that: The plug terminal is provided with a welding tab that bends outward from the bottom end of the outer wall contact portion, and the thickness of the welding tab is less than the thickness of the inverted U-shaped contact portion.

4. The board-to-board connector as described in claim 2, characterized in that: The socket terminal has an upright U-shaped portion and an inverted U-shaped portion connected to the upright U-shaped portion. The upright U-shaped portion contacts the inverted U-shaped contact portion of the plug terminal, and the inverted U-shaped portion is fixed to the side portion.

5. The board-to-board connector as described in claim 4, characterized in that: The upright U-shaped portion is provided with a first leg adjacent to the side portion and a second leg adjacent to the island portion, the bottom of the first leg and the second leg are connected; when the plug connector is inserted into the socket connector, the outer wall contact portion abuts against the first leg and the inner wall contact portion abuts against the second leg.

6. The board-to-board connector as described in claim 5, characterized in that: The first leg is provided with a first elastic contact portion that protrudes into the socket slot, and the outer wall contact portion is provided with an outwardly protruding protrusion. When the plug connector is inserted into the socket connector, the first elastic contact portion of the socket terminal is engaged with the protrusion of the plug terminal.

7. The board-to-board connector as described in claim 6, characterized in that: The second leg is provided with a second elastic contact portion that protrudes into the socket slot. The inner wall contact portion has a smooth contact surface. During the process of the plug connector being inserted into the socket connector, the second elastic contact portion scrapes the contact surface of the inner wall contact portion, and the scraping stroke of the second elastic contact portion is 0.09mm.

8. The board-to-board connector as described in claim 5, characterized in that: The inverted U-shaped portion shares the first support leg with the upright U-shaped portion, and the inverted U-shaped portion is provided with an assembly portion fixed in the side portion and a welding portion connected to the bottom of the assembly portion. The top of the assembly portion is connected to the top of the first support leg, and the welding portion extends laterally outward from the socket body.

9. The board-to-board connector as described in claim 2, characterized in that: The radius of the radius of the R-angle at the connection between the outer wall contact portion and the connecting portion is 0.08 mm, and the radius of the radius of the R-angle at the connection between the inner wall contact portion and the connecting portion is 0.07 mm.

10. The board-to-board connector as described in claim 1, characterized in that: When the plug connector and the socket connector are mated, the distance from the bottom surface of the plug connector to the bottom surface of the socket connector is equal to 0.4 mm.

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