Board-to-board connector

Abstract

The present invention discloses a board-to-board connector, which includes an insulating body, terminals fixed to the insulating body, and protective brackets located at the longitudinal two ends of the insulating body. The insulating body is provided with two side walls and a slot located between the two side walls. The protective bracket includes a side wall reinforcing piece covering the side wall and an auxiliary reinforcing piece located in the slot. The side wall reinforcing piece is provided with a side wall top plate portion covering the top surface of the side wall and a first elastic arm extending downward from the transverse inner side of the side wall top plate portion; the auxiliary reinforcing piece is provided with a main body portion and second elastic arms protruding upward from the transverse two sides of the main body portion, and the second elastic arms support the first elastic arm when it deforms. The first elastic arm is used to improve the current-carrying capacity, and the second elastic arm is used to improve the strength of the first elastic arm; thereby, the board-to-board connector adopts a double elastic arm structure, which improves the current-carrying capacity of the board-to-board connector and at the same time improves the self-strength of the protective bracket.

Description

Technical Field

[0001] The invention relates to a board-to-board connector, in particular to a board-to-board connector with a metal protection bracket. Background Art

[0002] Board to Board Connector (BTB) is a connector commonly used in electronic devices (such as mobile phones, tablet computers, etc.), and its function is to achieve mechanical and electrical interconnection between the mainboard of the electronic device and various modules (such as display modules, touch modules, camera modules, etc.). In the existing board-to-board connector, each electrical connector will increase the protective bracket to improve its own strength, so as to avoid abnormal situations such as inadequate assembly due to damage to the plastic body during plugging. At the same time, with the development of fast charging technology, users have put forward higher requirements for the battery life of electronic devices and shorten the charging time of batteries. In order to achieve fast charging of batteries, it is required that the devices on the fast charging path, such as batteries, board-to-board connectors and chips, can carry the transmission of large currents. However, due to the space limitation of the existing board-to-board connector, the protective bracket cannot take into account both stable contact strength and good large current flow capacity. Therefore, how to take into account the strength of the protective bracket while ensuring the flow capacity of the board-to-board connector has become a technical problem that needs to be solved urgently by technicians in this field.

[0003] Therefore, it is hoped to provide a new board-to-board connector to overcome the above defects. Summary of the invention

[0004] An object of the present invention is to provide a board-to-board connector with high current and low degradation.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a board-to-board connector, comprising an insulating body extending in the longitudinal direction, a terminal fixed on the insulating body, and a protective bracket located at both ends of the insulating body in the longitudinal direction, wherein the insulating body is provided with two side walls extending in the longitudinal direction and a slot located between the two side walls. The protective bracket comprises an end reinforcement piece fixed at both ends of the insulating body and a side wall reinforcement piece at least partially covering the side wall, wherein the side wall reinforcement piece is connected to both ends of the end reinforcement piece in the transverse direction. The side wall reinforcement piece is provided with a side wall top plate portion at least partially covering the top surface of the side wall and a first elastic arm extending downward from the transverse inner side of the side wall top plate portion into the slot, wherein the protective bracket also comprises an auxiliary reinforcement piece located in the slot, wherein the auxiliary reinforcement piece is provided with a main body portion fixed in the insulating body and a second elastic arm protruding upward from both transverse sides of the main body portion, wherein the first elastic arm is located above and outside the second elastic arm, and the second elastic arm supports the first elastic arm when it is deformed.

[0006] In a preferred embodiment, the side wall is provided with a receiving groove recessed inward from the inner wall surface, the receiving groove communicates with the slot, and the second elastic arm is received in the receiving groove.

[0007] In a preferred embodiment, the first elastic arm is provided with an inclined guiding portion extending obliquely downward from the transverse inner side of the side wall top plate portion and an abutting portion extending from the inclined guiding portion into the slot, the second elastic arm is provided with connecting portions extending upward and bent from the transverse two sides of the main body portion and elastic contact portions protruding from the connecting portions toward the abutting portion, and the abutting portion elastically abuts against the elastic contact portions.

[0008] In a preferred embodiment, the insulating body is provided with a central island portion located in the slot, the auxiliary reinforcing piece is provided with an island end plate portion extending upward and bent from a longitudinal side of the main body portion and covering the longitudinal end face of the island portion and a welding portion extending from the other longitudinal side of the main body portion, the end of the island end plate portion extends to the top surface of the island portion and is buried in the island portion, and the welding portion extends out of the insulating body along the longitudinal direction.

[0009] In a preferred embodiment, the insulating body is provided with two end walls connecting the two side walls, the end reinforcing piece covers the end walls and is provided with an end wall top plate portion covering the top surface of the end walls and an end wall inner plate portion extending obliquely downward from the transverse inner side of the end wall top plate portion, the end wall inner plate portion shields the inner wall surface of the end walls, and the side wall top plate portion is connected to the transverse two ends of the end wall top plate portion.

[0010] In a preferred embodiment, the side wall top plate portion is connected to the transverse two ends of the end wall top plate portion to form a top surface shielding portion, the top surface shielding portion includes a horizontal portion arranged parallel to the top surface of the insulating body and an inclined portion extending obliquely downward from the inner side edge of the horizontal portion, and the inclined portion is drawn and formed from the inner side edge of the horizontal portion.

[0011] In a preferred embodiment, the end reinforcing piece is provided with an end wall side plate portion extending obliquely downward from the longitudinal outer side of the end wall top plate portion and welding legs extending out of the insulating body along the longitudinal direction from the bottom edge of the end wall side plate portion, the end wall side plate portion shields the outer wall surface of the end walls and clamps the end walls longitudinally with the end wall inner plate portion, and the welding legs are arranged on the transverse two sides of the welding portion.

[0012] In a preferred embodiment, the side wall reinforcing piece is provided with a side wall side plate portion extending obliquely downward from the transverse outer side of the side wall top plate portion, the side wall side plate portion at least partially covers the outer wall surface of the side wall and is provided with welding foot portions located at the bottom edge.

[0013] In a preferred embodiment, the side wall reinforcing piece is connected to the transverse two ends of the end reinforcing piece to form an end bracket, the end bracket is assembled on the insulating body from top to bottom, and the auxiliary reinforcing piece is integrally formed on the insulating body.

[0014] In a preferred embodiment, the end bracket is made of a highly conductive material, and the auxiliary reinforcing piece is made of a high-strength material such as stainless steel, that is, the strength of the second elastic arm is greater than that of the first elastic arm, and the conductivity of the first elastic arm is greater than that of the second elastic arm.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the side wall reinforcing piece is provided with a side wall top plate portion at least partially covering the top surface of the side wall and a first elastic arm extending downward from the transverse inner side of the side wall top plate portion into the slot, the protection bracket further includes an auxiliary reinforcing piece located in the slot, the auxiliary reinforcing piece is provided with a main body portion fixed in the insulating body and second elastic arms extending upward from the transverse two sides of the main body portion, the first elastic arm is located above and outside the second elastic arm, and the second elastic arm supports the first elastic arm when it deforms. The first elastic arm is made of a highly conductive material to improve the current-carrying capacity of the board-to-board connector; the second elastic arm is made of a high-strength material such as stainless steel to improve the strength of the first elastic arm to avoid the first elastic arm from yielding and deforming due to pressure during docking. Thereby, the board-to-board connector of the present invention adopts a double elastic arm structure, which improves the current-carrying capacity of the board-to-board connector and the self-strength of the protection bracket at the same time. Description of the Drawings

[0016] Figure 1 is a perspective view of the board-to-board connector in a preferred embodiment of the present invention.

[0017] Figure 2 is Figure 1 an exploded view of the board-to-board connector shown.

[0018] Figure 3 is Figure 1 a top view of the board-to-board connector shown.

[0019] Figure 4 is Figure 3 a sectional view of the board-to-board connector shown along the A-A direction.

[0020] Figure 5 is Figure 3 a sectional view of the board-to-board connector shown along the B-B direction.

[0021] Figure 6 is Figure 2 a perspective view of the end bracket in the board-to-board connector shown.

[0022] Figure 7 is Figure 6 A perspective view of the end bracket shown from another angle.

[0023] Figure 8 is Figure 2 A perspective view of the auxiliary reinforcing piece in the board-to-board connector shown. Detailed implementation manners

[0024] Referring to Figures 1 to 3 As shown, a preferred embodiment of the present invention discloses a board-to-board connector 100, which includes an insulating body 10 extending longitudinally, terminals 20 held on the insulating body 10, and protective brackets 30 located at both longitudinal ends of the insulating body 10. The insulating body 10 is provided with a central island portion 11 extending longitudinally, side walls 12 located on both lateral sides of the island portion 11, and end walls 13 connecting the two side walls 12. The island portion 11, the side walls 12, and the end walls 13 together define a slot 14, that is, the island portion 11 is located within the slot 14, and the slot 14 is for the insertion of a docking connector (not shown).

[0025] The protective brackets 30 are fixed to both longitudinal ends of the insulating body 10 to enhance the overall strength of the board-to-board connector 100. The protective brackets 30 include end reinforcing pieces 40 covering the end walls 13, side wall reinforcing pieces 50 at least partially covering the side walls 12, and auxiliary reinforcing pieces 60 at least partially covering the island portion 11. The end reinforcing pieces 40 are held at both longitudinal ends of the insulating body 10, and the side wall reinforcing pieces 50 are connected to the transverse ends of the end reinforcing pieces 40.

[0026] Combined with Figure 4 and Figure 7 As shown, the end reinforcing piece 40 is provided with an end wall top plate portion 41 covering the top surface of the end wall 13, an end wall inner plate portion 42 bent downward and extending from the longitudinal inner side of the end wall top plate portion 41, an end wall side plate portion 43 bent downward and extending from the longitudinal outer side of the end wall top plate portion 41, and a welding leg 44 extending longitudinally out of the insulating body 10 from the bottom edge of the end wall side plate portion 43. The end wall inner plate portion 42 shields the inner wall surface of the end wall 13, and the end wall side plate portion 43 shields the outer wall surface of the end wall 13, that is, the end wall side plate portion 43 and the end wall inner plate portion 42 clamp the end wall 13 longitudinally to enhance the strength of the end wall 13 of the insulating body 10. The welding leg 44 is used for welding and fixing on a circuit board (not shown), thereby increasing the current conduction ability of the board-to-board connector 100.

[0027] The side wall reinforcing piece 50 is provided with a side wall top plate portion 51 that at least partially covers the top surface of the side wall 12, a side wall side plate portion 52 that extends downward and is bent laterally outward from the side wall top plate portion 51, and a first elastic arm 53 that extends downward from the lateral inner side of the side wall top plate portion 51 and into the slot 14. The side wall top plate portion 51 is connected to the lateral two ends of the end wall top plate portion 41, so that the side wall reinforcing piece 50 and the end reinforcing piece 40 form an integral end bracket. The side wall side plate portion 52 at least partially covers the outer wall surface of the side wall 12, and is used to enhance the strength of the side wall 12 of the insulating body 10. The side wall side plate portion 52 is provided with welding feet 54 at the bottom edge, and the welding feet 54 are used for welding and fixing on the circuit board, thereby increasing the current conduction ability of the board-to-board connector 100.

[0028] In this embodiment, the side wall top plate portion 51 is connected to the lateral two ends of the end wall top plate portion 41 to form a top surface shielding portion 31. The top surface shielding portion 31 includes a horizontal portion 32 arranged parallel to the top surface of the insulating body 10 and an inclined portion 33 that extends downward and obliquely from the inner side edge of the horizontal portion 32, and the inclined portion 33 is drawn and formed from the inner side edge of the horizontal portion 32. The inclined portion 33 is used to guide the insertion of the docking connector when the board-to-board connector 100 is inserted into the docking connector. After the inclined portion 33 is drawn and formed, its material will become hard through cold working hardening, so that the strength of the inclined portion 33 becomes larger and the guiding effect is also significantly improved, that is, the end bracket has good guiding performance while ensuring the overall strength.

[0029] Combined Figure 8 As shown, the auxiliary reinforcing piece 60 is located in the slot 14 of the insulating body 10 and is provided with a main body portion 61 fixed in the insulating body 10, an island end plate portion 62 that extends upward and is bent longitudinally from one side of the main body portion 61, second elastic arms 63 that protrude upward from the lateral two sides of the main body portion 61, and a welding portion 64 that extends from the other longitudinal side of the main body portion 61. The main body portion 61 is buried in the insulating body 10 below the slot 14. The island end plate portion 62 covers the longitudinal end surface of the island portion 11, and at the same time, the end of the island end plate portion 62 extends to the top surface of the island portion 11 and is buried in the island portion 11, so as to enhance the strength of the island portion 11 of the insulating body 10. The welding portion 64 extends out of the insulating body 10 longitudinally, and the welding feet 44 are arranged on the lateral two sides of the welding portion 64; at the same time, the welding portion 64 is used for welding and fixing on the circuit board, thereby increasing the current conduction ability of the board-to-board connector 100.

[0030] The side wall 12 is provided with a receiving groove 15 recessed inward from the inner wall surface. The receiving groove 15 communicates with the insertion slot 14. The second elastic arm 63 is received in the receiving groove 15. At the same time, the first elastic arm 53 covers the second elastic arm 63 and the receiving groove 15. The provision of the receiving groove 15 can reduce the space occupied by the first elastic arm 53 and the second elastic arm 63 in the transverse direction, so that the transverse width of the insulating body 10 can be designed to be smaller. In this embodiment, the first elastic arm 53 is located outside and above the second elastic arm 63, and the second elastic arm 63 supports the first elastic arm 53 when it deforms. Specifically, the first elastic arm 53 is provided with an inclined guiding portion 531 that extends obliquely downward from the transverse inner side of the side wall top plate portion 51 and an abutting portion 532 that extends from the inclined guiding portion 531 into the insertion slot 14. The second elastic arm 63 is provided with connecting portions 631 that bend upward from the transverse sides of the main body portion 61 and elastic contact portions 632 that protrude from the connecting portions 631 toward the abutting portion 532. The abutting portion 532 can elastically abut against the elastic contact portion 632.

[0031] The end bracket is assembled on the insulating body 10 from top to bottom, and the auxiliary reinforcing piece 60 is integrally formed on the insulating body 10. Among them, the end bracket is made of a highly conductive material to improve the current-carrying capacity of the board-to-board connector 100. Therefore, the first elastic arm 53 does not require its own strength, and its thickness can be set to 0.1 mm. The auxiliary reinforcing piece 60 is made of a high-strength material such as stainless steel. The second elastic arm 63 is used to improve the strength of the first elastic arm 53 and prevent the first elastic arm 53 from being compressed and yielding during docking. Therefore, the second elastic arm 63 does not require current-carrying capacity. It can be seen that in this embodiment, the strength of the second elastic arm 63 is greater than that of the first elastic arm 53, and the conductivity of the first elastic arm 53 is greater than that of the second elastic arm 63.

[0032] In the present invention, the protection bracket 30 includes an end reinforcing piece 40 covering the end wall 13 and a side wall reinforcing piece 50 at least partially covering the side wall 12, thereby enhancing the self-strength of the board-to-board connector 100. The side wall reinforcing piece 50 is provided with a first elastic arm 53 extending downward from the lateral inner side of the side wall top plate portion 51 into the slot 14. The auxiliary reinforcing piece 60 is provided with a main body portion 61 fixed in the insulating body 10 and second elastic arms 63 protruding upward from the lateral sides of the main body portion 61. The first elastic arm 53 is located above and outside the second elastic arm 63, and the second elastic arm 63 supports the first elastic arm 53 when it deforms. The first elastic arm 53 is made of a highly conductive material to enhance the current-carrying capacity of the board-to-board connector 100. The second elastic arm 63 is made of a high-strength material such as stainless steel to enhance the strength of the first elastic arm 53 to prevent the first elastic arm 53 from yielding and deforming due to pressure during docking. Therefore, the board-to-board connector 100 of the present invention adopts a double elastic arm structure, which enhances the current-carrying capacity of the board-to-board connector 100 and the self-strength of the protection bracket 30 at the same time.

[0033] In summary, the above are only the preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby. That is, all simple equivalent changes and modifications made according to the claims and the content of the specification of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A board-to-board connector, comprising an insulating body extending longitudinally, terminals held on the insulating body, and protective brackets located at two longitudinal ends of the insulating body. The insulating body is provided with two side walls extending longitudinally and a slot located between the two side walls. The protective bracket includes end reinforcing pieces held at two ends of the insulating body and side wall reinforcing pieces at least partially covering the side walls. The side wall reinforcing pieces are connected to transverse ends of the end reinforcing pieces to form end brackets; characterized in that: The side wall reinforcing piece is provided with a side wall top plate portion at least partially covering the top surface of the side wall and a first elastic arm extending downward from the lateral inner side of the side wall top plate portion into the slot. The protection bracket further includes an auxiliary reinforcing piece located in the slot. The auxiliary reinforcing piece is provided with a main body portion fixed in the insulating body and second elastic arms protruding upward from the lateral two sides of the main body portion. The first elastic arm is located above and outside the second elastic arm, and the second elastic arm supports the first elastic arm when it deforms. The end bracket is made of a highly conductive material, while the auxiliary reinforcing piece is made of a high-strength material of stainless steel, that is, the strength of the second elastic arm is greater than that of the first elastic arm, and the conductivity of the first elastic arm is greater than that of the second elastic arm.

2. The board-to-board connector according to claim 1, wherein: The side wall is provided with a receiving groove recessed inward from the inner wall surface. The receiving groove communicates with the slot, and the second elastic arm is received in the receiving groove.

3. The board-to-board connector according to claim 2, characterized in that: The first elastic arm is provided with an inclined guiding portion extending downward and obliquely from the lateral inner side of the side wall top plate portion and a butting portion extending from the inclined guiding portion into the slot. The second elastic arm is provided with a connecting portion extending upward and bent from the lateral two sides of the main body portion and an elastic contact portion protruding from the connecting portion toward the butting portion. The butting portion elastically abuts against the elastic contact portion.

4. The board-to-board connector according to claim 1, wherein: The insulating body is provided with a central island portion located in the slot. The auxiliary reinforcing piece is provided with an island end plate portion extending upward and bent from a longitudinal side of the main body portion and covering the longitudinal end face of the island portion and a welding portion extending from the other longitudinal side of the main body portion. The end of the island end plate portion extends to the top surface of the island portion and is buried in the island portion. The welding portion extends out of the insulating body along the longitudinal direction.

5. The board-to-board connector according to claim 4, wherein: The insulating body is provided with two end walls connecting the two side walls. The end reinforcing piece covers the end walls and is provided with an end wall top plate portion covering the top surface of the end walls and an end wall inner plate portion extending downward and bent from the longitudinal inner side of the end wall top plate portion. The end wall inner plate portion shields the inner wall surface of the end walls. The side wall top plate portion is connected to the lateral two ends of the end wall top plate portion.

6. The board-to-board connector according to claim 5, characterized in that: The side wall top plate portion is connected to the lateral two ends of the end wall top plate portion to form a top surface shielding portion. The top surface shielding portion includes a horizontal portion arranged parallel to the top surface of the insulating body and an inclined portion extending downward and obliquely from the inner side edge of the horizontal portion. The inclined portion is formed by drawing from the inner side edge of the horizontal portion.

7. The board-to-board connector according to claim 5, wherein: The end reinforcing piece is provided with an end wall side plate portion extending downward and bent from the longitudinal outer side of the end wall top plate portion and a welding leg extending out of the insulating body along the longitudinal direction from the bottom edge of the end wall side plate portion. The end wall side plate portion shields the outer wall surface of the end walls and clamps the end walls longitudinally with the end wall inner plate portion. The welding leg is arranged on the lateral two sides of the welding portion.

8. The board-to-board connector according to claim 1, wherein: The side wall reinforcing piece is provided with a side wall side plate portion extending downward and bent from the lateral outer side of the side wall top plate portion. The side wall side plate portion at least partially covers the outer wall surface of the side wall and is provided with a welding foot portion located at the bottom edge.

9. The board-to-board connector according to claim 1, characterized in that: The end bracket is assembled on the insulation body from top to bottom, and the auxiliary reinforcing piece is integrally formed on the insulation body.

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