CN112636035A

CN112636035A - Board-to-board connector

Info

Publication number: CN112636035A
Application number: CN202011583902.4A
Authority: CN
Inventors: 张佳华
Original assignee: Kunshan Jiahua Electronics Co Ltd
Current assignee: Kunshan Jiahua Electronics Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-04-09

Abstract

The utility model provides a board to board connector for electricity is connected to butt joint circuit board, includes insulator, a plurality of conductive terminal and fender bracket, and is a plurality of conductive terminal arranges along insulator's length direction and arranges on insulator, the fender bracket combines in insulator length direction's both ends and is located a plurality of the position outside the conductive terminal arrangement range, each the fender bracket includes first fender bracket and second fender bracket, first fender bracket and second fender bracket are independent each other, first fender bracket combines with insulator through integrated into one piece, the second fender bracket through the equipment combine in insulator. The socket connector of the application has better structural stability.

Description

Board-to-board connector

[ technical field ] A method for producing a semiconductor device

The present application relates to a board-to-board connector.

[ background of the invention ]

The board-to-board connector generally comprises two parts, namely a plug and a socket, wherein the plug and the socket are both composed of a plastic body and a conductive terminal fixed on the plastic body, the plastic body mainly plays a role in insulating and positioning the conductive terminal, and the conductive terminal mainly plays a role in transmitting signals. Typically, the plug and receptacle of the prior art board-to-board connector also add a protective bracket to enhance the strength of the connector, and the protective bracket also serves as a retention force when the plug is mated with the receptacle, wherein in some prior art protective brackets may also be used as current terminals. Therefore, the requirements on the bonding strength of the protection bracket and the plastic body, the length of the arm of force of the elastic arm on the protection bracket, the overall structural strength and stability of the board-to-board connector combined with the protection bracket are higher, and particularly under the design trend that the board-to-board connector is more and more miniaturized nowadays.

Therefore, it is necessary to provide a new design for achieving better effect.

[ summary of the invention ]

It is an object of the present application to provide a new board-to-board connector having a better structural stability.

The purpose of the application is realized by the following technical scheme:

a board-to-board connector for electrically connecting to a butt-joint circuit board comprises an insulating body, a plurality of conductive terminals and a protection frame, wherein the conductive terminals are arranged on the insulating body along the length direction of the insulating body, the protection frame is combined at two ends of the insulating body in the length direction and is positioned outside the arrangement range of the conductive terminals,

each of the protection frames comprises a first protection frame and a second protection frame, the first protection frame and the second protection frame are mutually independent, the first protection frame is combined with the insulation body through integral forming, and the second protection frame is combined with the insulation body through assembling.

Further, the first protection frame and the second protection frame are partially overlapped along the inserting and pulling direction of the butting connector.

Furthermore, the insulating body forms an inserting space for inserting a butting connector, the insulating body comprises a bottom wall, two side walls formed by upwards extending the two sides of the bottom wall along the length direction of the bottom wall and an island wall formed by upwards extending the middle position of the bottom wall, a plurality of conductive terminals are respectively arranged on the two side walls, an island wall protecting part is formed on the first protecting frame, and the island wall protecting part is embedded in the end surface of the island wall in the length direction.

Furthermore, the upper end edge of one end of the island wall protection part, which is far away from the butt-joint circuit board, is further folded back towards the butt-joint circuit board and extends to form an embedded part, the embedded part is embedded in two ends of the island wall along the length direction correspondingly, and one end of the embedded part, which is close to the butt-joint circuit board, further extends to form an embedded butt-joint part protruding out of the lower surface of the bottom wall.

Further, first protection frame include with the diapire supporting part of the lower extreme edge body coupling of dado protection portion, the diapire supporting part bury underground in the length direction's of diapire both ends position, the diapire supporting part upwards exposes to the grafting space in, the diapire supporting part exposes downwards to the diapire and pastes the lower surface that butts against the circuit board.

Further, the first protection frame comprises a side wall protection part, the side wall protection part is integrally connected with the bottom wall supporting part, and the side wall protection part is embedded in the inner wall surfaces at the two ends of the side wall in the length direction and is located at a position outside the arrangement range of the conductive terminals.

Furthermore, the end of the side wall protection part, which is far away from the butt circuit board, is bent to form a positioning part, the positioning part is correspondingly embedded at the position of the upper surface of the side wall, which is far away from one side of the butt circuit board, at least part of the positioning part is exposed out of the upper surface of the side wall and forms a positioning upper surface, positioning grooves are formed in the upper surface of the lower surface of the insulation body in an upwards sunken mode at the two ends of the width direction of the insulation body, and at least part of the positioning part is exposed out of the insulation body.

Furthermore, the insulating body further comprises two end walls which are formed by extending upwards from two sides of the bottom wall along the width direction of the bottom wall, the two side walls, the two end walls and the island wall jointly define a plugging space with an upward opening, the first protection frame further comprises an end wall protection part which is correspondingly embedded in the inner wall surface of the end wall, and one end, far away from the butt joint circuit board, of the end wall protection part is further bent and extends to form an end wall butt joint part protruding out of the end wall.

Further, the second protection frame comprises an upper end wall portion, a butt joint foot portion, a main body portion and an elastic arm portion, wherein the upper end wall portion at least covers the upper surface of the end portion of the side wall along the length direction, the butt joint foot portion is used for being fixed with a butt joint circuit board, the main body portion integrally connects the upper end wall portion with the butt joint foot portion, the elastic arm portion is formed by bending and extending the butt joint foot portion, the elastic arm portion is attached to at least part of the inner wall surface of the side wall, at least part of the elastic arm portion can elastically displace along the width direction of the insulation body 1, and the elastic arm portion is provided with a contact portion which at least partially protrudes into the plugging space along the width direction of the insulation body.

Further, the upper surface of the upper end wall portion of the second protection frame is higher than the upper surface of the first protection frame and higher than the upper surface of the side wall to form a section difference, and an arc-shaped guide surface is formed on the inner side, adjacent to the plugging space, of the upper end wall portion through a drawing process.

Compare in prior art, the board-to-board connector of this application has better structural stability.

[ description of the drawings ]

Fig. 1 is a perspective view of a first embodiment of a board-to-board connector of the present application;

fig. 2 is a partially exploded perspective view of a first embodiment of the board-to-board connector of the present application, particularly illustrating a perspective view of one of the protection brackets separated from the insulative housing;

fig. 3 is a partially exploded perspective view of the first embodiment of the board-to-board connector of the present application, particularly illustrating a perspective view of one of the protection brackets and the supporting bracket separated from the insulating body;

FIG. 4 is a perspective view of FIG. 3 from another angle;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 6 is an elevation view of the cross-sectional view of FIG. 5 taken along the length of the insulator body;

FIG. 7 is a perspective view of another embodiment of a cage for a board-to-board connector of the present application;

FIG. 8 is a perspective view of the protective cage of FIG. 7 from another angle;

FIG. 9 is a bottom view of the protective cage of FIG. 7;

fig. 10 is a perspective view of a second embodiment of the board-to-board connector of the present application;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

fig. 12 is a partially exploded perspective view of a second embodiment of the board-to-board connector of the present application, particularly illustrating a perspective view of one of the protective brackets separated from the insulative housing;

fig. 13 is a perspective view of fig. 12 from another angle.

[ detailed description ] embodiments

Hereinafter, a specific embodiment of the board-to-board connector of the present application will be described with reference to fig. 1 to 13.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In addition, in the description of the application, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the application can be understood in a specific context by those of ordinary skill in the art.

In the description of the present application, it is to be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to be inclusive and not exclusive, e.g., a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 6, a first embodiment of a board-to-board connector disclosed in the present application is shown, the board-to-board connector is used for electrically connecting to a butt-joint circuit board, the board-to-board connector includes an insulating body 1, a plurality of conductive terminals 2 and a protection frame 3, the plurality of conductive terminals 2 are arranged on the insulating body 1 along a length direction of the insulating body 1, and the protection frame 3 is combined to two ends of the insulating body 1 in the length direction and is located at a position outside an arrangement range of the plurality of conductive terminals 2.

Referring to fig. 1 to 6, the insulating body 1 is formed with an insertion space 10 and includes a bottom wall 11 attached to a butt circuit board, two side walls 12 extending upward from two sides of the bottom wall 11 along a length direction of the bottom wall 11, two end walls 13 extending upward from two sides of the bottom wall 11 along a width direction of the bottom wall 11, and an island wall 14 extending upward from a middle position of the bottom wall 11, wherein a plurality of conductive terminals 2 are respectively arranged on the two side walls 12. The bottom wall 11, the two side walls 12, the two end walls 13 and the island wall 14 together define a plug space 10 which is open upwards.

Referring to fig. 1 to 6, each of the protection frames 3 includes a first protection frame 301 and a second protection frame 302, the first protection frame 301 and the second protection frame 302 are independent from each other, the first protection frame 301 is integrated with the insulation body 1, and the second protection frame 302 is assembled with the insulation body 1.

As shown in fig. 2 to 6, the first protective frame 301 is formed with an island wall protection portion 3011, and the island wall protection portion 3011 is embedded in the end surface of the island wall 14 in the longitudinal direction. The island wall protection portions 3011 serve to protect the structural strength of the island walls 14, and at the same time, can protect the island walls 14 from being scratched and damaged when a mating connector is inserted. The upper end edge of the island wall protection part 3011 far away from the end of the butt-joint circuit board is further folded back towards the butt-joint circuit board and extends to form an embedded part 3014, the embedded part 3014 is embedded in both ends of the island wall 14 along the length direction correspondingly, and one end of the embedded part 3014 close to the butt-joint circuit board further extends to form an embedded butt-joint part 3015 protruding out of the lower surface of the bottom wall 11. The embedded portion 3014 is used to increase the bonding strength between the first protection frame 301 and the insulation body 1, the embedded butt-joint portion 3015 is used to position the first protection frame 301 with the mold core during the integral molding, and the embedded butt-joint portion 3015 can be used to be welded and fixed with the butt-joint connector.

Further, the first protection frame 301 further includes a bottom wall support portion 3012 integrally connected to the lower end edge of the island wall protection portion 3011, the bottom wall support portion 3012 is embedded at two end positions of the length direction of the bottom wall 11, the bottom wall support portion 3012 is upwardly exposed to the insertion space 10, and the bottom wall support portion 3012 is downwardly exposed until the bottom wall 11 abuts against the lower surface of the butt-joint circuit board for positioning a mold core during integral forming. The bottom wall supports 3012 serve to increase the structural strength of the bottom wall.

Further, the first protection frame 301 includes a side wall protection portion 3013, the side wall protection portion 3013 is integrally connected to the bottom wall support portion 3012, and the side wall protection portion 3013 is embedded in the inner wall surfaces at the two ends of the side wall 12 in the length direction and is located at a position outside the arrangement range of the plurality of conductive terminals 2. One end of the side wall protection portion 3013, which is far away from the docking circuit board, is bent to form a positioning portion 3016, the positioning portion 3016 is embedded in the upper surface of the side wall 12, which is far away from the docking circuit board, at least a portion of the positioning portion 3016 is exposed out of the upper surface of the side wall 12 and forms a positioning upper surface 30161, two ends of the insulating body 1 in the width direction are recessed upwards at the lower surface to form positioning grooves 111, and at least a portion of the positioning portion 3016 is exposed out of the insulating body 1 downwards through the positioning grooves 111 to form a positioning lower surface 30162. The positioning upper surface 30161 and the positioning lower surface 30162 are used for positioning a mold core during integral molding, and the positioning portion 3016 is also used for guiding the docking connector to be inserted into the plugging space 10, and the sidewall protection portion 3013 can enhance the structural strength of the sidewall.

Further, the first protection frame 301 further includes an end wall protection portion 3017 embedded in the inner wall surface of the end wall 13, the end wall protection portion 3017 is integrally connected to the bottom wall support portion 3012, and one end of the end wall protection portion 3017 away from the butt-joint circuit board is further bent and extended to form an end wall butt-joint portion 3018 protruding out of the end wall 13. The end wall protection portion 3017 is used to increase the structural strength of the end wall 13, the end wall butt-joint portion 3018 is used to position the mold core during integral molding, and the end wall butt-joint portion 3018 is also the material connecting position with the material belt. In some embodiments, the end wall interface 3018 may also be used to make electrical contact with the second protective frame 302. Along the plugging and unplugging direction of the butting connector, the first protection frame 301 and the second protection frame 302 are partially overlapped, and in this application, specifically: the protection portion 3017 and the end wall butting portion 3018 partially overlap with an end wall upper wall portion 312 described below along the inserting and extracting direction of the mating connector.

In this application, through setting up first protection frame 301, strengthen insulator 1's intensity through first protection frame 301, especially insulator 1's length direction's both ends position's structural strength, design first protection frame 301 simultaneously into with diapire 11, lateral wall 12, end wall 13 and island wall 13 all have the cooperation to combine the structure, make diapire 11, lateral wall 12, the overall structure intensity between end wall 13 and the island wall 13 obtain the guarantee, also make diapire 11 simultaneously, lateral wall 12, the internal face that end wall 13 and island wall 13 correspond the position is strengthened, can effectively prevent the butt-joint connector from inserting and hanging damage insulator 1.

Referring to fig. 2 to 4, the second protection frame 302 includes an upper end wall 31, a pair of legs 32 and a main body (not numbered). The upper end wall 31 is combined with the upper surfaces of the two ends of the insulating body 1 in the length direction and is located outside the arrangement range of the plurality of conductive terminals 2. The docking leg portions 32 are used to secure with a docking circuit board. The main body part is fixed with the insulating body 1. The second protection frame 302 further includes a resilient arm portion 34 formed by extending the docking foot portion 32, wherein the resilient arm portion 34 is used for resiliently contacting with a docking connector (not shown).

As shown in fig. 2 to 4, in particular, the butt-joint leg portion 32 integrally connects the elastic arm portion 34 and the main body portion, and the main body portion integrally connects the upper end wall portion 31 and the butt-joint leg portion 32. The elastic arm portion 34 is coupled to at least a portion of the inner wall surface of the side wall 12, at least a portion of the elastic arm portion 34 is elastically displaceable in the width direction of the insulating body 1, and the elastic arm portion 34 is formed with a contact portion 3404 that at least partially protrudes into the insertion space 10 in the width direction of the insulating body 1. The contact portion 3404 is used for electrically connecting with a butting connector.

As shown in fig. 2 and 3, the main body includes an outer wall 331, the outer wall 331 is coupled to an outer wall of an end portion of the side wall 12 along the longitudinal direction, the mating pin portion 32 is formed by bending and extending the outer wall 331 adjacent to an edge of the mating circuit board, and the elastic arm portion 34 is formed by bending and extending the edge of the mating pin portion 32. The elastic arm 34 is formed by bending and extending the side of the butt leg 32 away from the outer wall 331 in the width direction of the insulator 1, the elastic arm 34 extends in the length direction of the insulator 1, and the outer wall 331 and the elastic arm 34 are disposed opposite to each other in the width direction of the insulator 1.

As shown in fig. 4, the elastic arm portion 34 includes a first elastic arm portion 3401, a bent arm portion 3403, and a second elastic arm portion 3402 integrally connected to the butt leg portion 32. The bent arm portions 3403 integrally connect the first elastic arm portions 3401 and the second elastic arm portions 3402. The first elastic arm portions 3401 and the second elastic arm portions 3402 form a step along the width direction of the insulating body 1. The distance between the first elastic arm portion 3401 and the outer wall portion 331 is smaller than the distance between the second elastic arm portion 3402 and the outer wall portion 331. The first elastic arm portion 3401 is close to an end portion of the side wall 12, the second elastic arm portion 3402 is distant from an end portion of the side wall 12, and the contact portion 3404 is formed on the second elastic arm portion 3402 in the length direction of the insulating body 1.

Referring to fig. 1 to 4, the upper end wall 31 includes a sidewall upper wall 311 and an end wall upper wall 312 integrally connected to each other. The side wall upper wall portion 311 is joined to an upper surface of an end portion of the side wall 12 in the longitudinal direction. The end wall upper wall portion 312 is joined to the upper surface of the end wall 13. At least one end edge of the end wall upper wall portion 312 is bent downward along the longitudinal direction of the insulating main body 1 to form an end wall shielding portion 3121. The end wall shield 3121 is bonded to the outer and/or inner surface of the end wall 13. The lower side edge of the end wall shield 3121 forms a docking foot 31211. The docking pins 31211 are correspondingly fixed with the docking circuit board.

Referring to fig. 1 to 6, further, an upper surface of the upper end wall 31 of the second protection frame 302 is higher than the upper surface of the first protection frame 301 and higher than the upper surface of the side wall 12 to form a step, and an arc-shaped guide surface 3101 is formed on the inner side of the upper end wall 31 adjacent to the plugging space 10 through a drawing process. The design makes the first protection frame 301 protect the board-to-board connector as a first layer of protection, and at the same time, when the butting connector is inserted into the board-to-board connector for butting, the first protection frame 301 is firstly contacted and guided by the first protection frame 301. The second fender bracket 302 serves as a secondary guide and guard. In addition, design into two types with fender bracket 3, wherein first fender bracket 301 combines fixedly through integrated into one piece and insulator 1, and second fender bracket 302 combines fixedly through equipment and insulator 1, can reduce the processing procedure degree of difficulty, because the too complicated single original paper (fender bracket 3) of structure is unfavorable for processing preparation on the one hand, on the other hand is unfavorable for assembling with insulator 1 cooperation, still be unfavorable for the realization of function, design into two types with a comparatively complicated original paper, carry out the split and carry out the assembly design according to the functional requirement that fender bracket 3 is located different positions, can be better satisfy the wholeness requirement, can reduce the processing degree of difficulty and processing procedure technology simultaneously.

Referring to fig. 7, 8 and 9, another embodiment of a second protection frame 302 of a board-to-board connector according to the present invention is shown, which is different from the second protection frame 302 of the first embodiment in the structure of the elastic arm 34 and the connection position between the elastic arm 34 and the butt foot 32, and specifically includes: the elastic arm portion 34 is formed by bending and extending the butt-joint leg portion 32 along one end of the length direction of the insulating body 1, the elastic arm portion 34 includes an elastic arm 341 and a bending arm 342, the elastic arm 341 and the outer wall portion 331 are oppositely disposed along the width direction of the insulating body 1, the bending arm 342 is used for connecting the elastic arm 341 and the butt-joint leg portion 32, and the contact portion 3404 is formed on the elastic arm 341. In addition, the bending arm 342 is located at an end edge position of the insulating body 1 along the length direction, and an extension plane of the bending arm 342 is perpendicular to an extension plane of the elastic arm 341. Otherwise, the other structures of the second protection frame 302 are the same as those of the first embodiment, and the reference numerals of the structures corresponding to the first embodiment are the same as those of the drawings, and the second protection frame 302 disclosed in this embodiment can also be combined to the insulating body 1 described in the first embodiment.

Referring to fig. 10 to 13, a second embodiment of the board-to-board connector according to the present invention is shown, the second embodiment mainly differs from the first embodiment in the structure of the second protection frame 302, and further, the second protection frame 302 mainly differs in the structure of the elastic arm 34 and the connection position between the elastic arm 34 and the butt pin portion 32, specifically: the elastic arm portion 34 includes a bent wall 342, a beam wall 343, and an elastic arm 341, and the bent wall 342 is formed by bending and extending the butt pin portion 32 upward along one end edge in the length direction of the insulating main body 1. The beam wall 343 is formed by further bending and extending the bent wall 342, the beam wall 343 is located between the upper end wall 31 and the upper surface of the side wall 12, the beam wall 343 is disposed opposite to the mating pin 32 along the plugging and unplugging direction of the mating connector and is disposed opposite to the upper end wall 31, the elastic arm 341 is formed by bending and extending one side edge of the beam wall 343 adjacent to the plugging space 10, and the elastic arm 341 is disposed opposite to the outer wall 331 along the width direction of the insulating body 1.

In the second embodiment, further, in the inserting and extracting direction of the mating connector, a gap is formed between the beam wall 343 and the upper end wall portion 31, a gap is formed between the beam wall 343 and the side wall 12, and the beam wall 343 can be elastically displaced in the inserting and extracting direction of the mating connector.

The insulation body 1 in the second embodiment is substantially the same as the first embodiment, and only the positions corresponding to the elastic arm portions 34 are subjected to the abdicating adjustment of some structures, and in addition, other structures in the second embodiment are the same as the first embodiment, and reference numerals of the structures corresponding to the first embodiment in the drawings are shared, and are not repeated herein.

In the embodiments disclosed in the present application, the docking leg portion 32 of the second protection frame 302 is used for fixing with a docking circuit board welder, and by designing the elastic arm portion 34 to be formed by directly bending and extending the docking leg portion 32, it can be ensured that the elastic displacement of the elastic arm portion 34 is not affected or interfered by other structures. When the mating connector is mated with the board-to-board connector, the pressure, impact, etc. of the mating connector against the second protective frame 302 are not transmitted to the resilient arm portions 34. Especially when the mating connector collides or hits against the upper end wall portion 31, the elastic deformation or the plastic deformation of the upper end wall portion 31 is not transmitted to the elastic arm portion 34 by the outer wall portion 331. In this way, the position of the elastic arm portion 34 can be kept within a controllable range, so as to improve the contact stability when the mating connector is mated with the board-to-board connector, especially the mating stability of the elastic arm portion 34 of the second protection frame 302 with the mating connector.

Except for the above differences, other structures in the second embodiment are substantially the same as those in the first embodiment, and are not described again, and the structural descriptions in the description and the structural reference numerals in the drawings are equally applicable.

In summary, the above is only a preferred embodiment of the present application, and should not be taken as limiting the scope of the present application, which is intended to cover all the modifications and equivalents of the claims and the specification.

Claims

1. The utility model provides a board to board connector for electricity is connected to butt joint circuit board, includes insulator, a plurality of conductive terminal and fender bracket, and is a plurality of conductive terminal arranges on insulator along insulator's length direction, the fender bracket combines insulator length direction's both ends and is located a plurality of position outside the conductive terminal arrangement scope, its characterized in that:

2. The board-to-board connector of claim 1, wherein: the first protection frame and the second protection frame are partially overlapped along the plugging direction of the butting connector.

3. The board-to-board connector of claim 1, wherein: the insulation body forms a splicing space for inserting a butting connector, the insulation body comprises a bottom wall, two side walls formed by upwards extending the two sides of the bottom wall along the length direction of the bottom wall and an island wall formed by upwards extending the middle position of the bottom wall, a plurality of conductive terminals are respectively arranged on the two side walls, an island wall protection part is formed on the first protection frame, and the island wall protection part is embedded on the end surface of the island wall in the length direction.

4. The board-to-board connector of claim 3, wherein: the upper end edge of one end, far away from the butt joint circuit board, of the island wall protection part is further folded back towards the butt joint circuit board and extends to form an embedded part, the embedded part is correspondingly embedded in two ends of the island wall along the length direction, and one end, close to the butt joint circuit board, of the embedded part extends to form an embedded butt joint part protruding out of the lower surface of the bottom wall.

5. The board-to-board connector of claim 3, wherein: the first protection frame comprises a bottom wall supporting part integrally connected with the lower end edge of the island wall protection part, the bottom wall supporting part is embedded at two ends of the bottom wall in the length direction, the bottom wall supporting part is upwards exposed into the insertion space, and the bottom wall supporting part is downwards exposed to the bottom wall and attached to the lower surface of the butt joint circuit board.

6. The board-to-board connector of claim 5, wherein: the first protection frame comprises a side wall protection part, the side wall protection part is integrally connected with the bottom wall supporting part, and the side wall protection part is embedded in the inner wall surfaces at two ends of the side wall in the length direction and is located at a position outside the arrangement range of the conductive terminals.

7. The board-to-board connector of claim 6, wherein: the one end that the butt joint circuit board was kept away from to lateral wall protection portion is bent and is formed with location portion, location portion correspond bury underground in the upper surface position that the butt joint circuit board one side was kept away from to the lateral wall, location portion exposes to the outside of the upper surface of lateral wall and forms the location upper surface partially at least, the width direction's of insulator both ends are sunken upwards in the lower surface and are formed with the constant head tank, location portion exposes the insulator outward and form the location lower surface through the constant head tank downwards at least partially.

8. The board-to-board connector of claim 3, wherein: the insulation body further comprises two end walls which are formed by upwards extending from two sides of the bottom wall along the width direction of the bottom wall, the two side walls, the two end walls and the island wall jointly define a plugging space with an upward opening, the first protection frame further comprises an end wall protection part which is correspondingly embedded in the inner wall surface of the end wall, and one end, far away from the butt joint circuit board, of the end wall protection part is further bent and extends to form an end wall butt joint part protruding out of the end wall.

9. The board-to-board connector according to any one of claims 3 to 8, wherein: the second protection frame comprises an upper end wall portion, a butt joint foot portion, a main body portion and an elastic arm portion, the upper end wall portion at least covers the upper surface of the end portion of the side wall along the length direction, the butt joint foot portion is used for being fixed with a butt joint circuit board, the main body portion enables the upper end wall portion to be integrally connected with the butt joint foot portion, the elastic arm portion is formed by bending and extending the butt joint foot portion, the elastic arm portion is attached to at least part of the inner wall surface of the side wall, at least part of the elastic arm portion can elastically displace along the width direction of the insulation body 1, and the elastic arm portion is provided with a contact portion which at least partially protrudes into the plugging space along the width direction of the insulation.

10. The board-to-board connector of claim 9, wherein: the upper surface of the upper end wall portion of the second protection frame is higher than the upper surface of the first protection frame and higher than the upper surface of the side wall to form a section difference, and an arc-shaped guide surface is formed on the inner side, adjacent to the plugging space, of the upper end wall portion through a drawing process.