CN218101755U - Connector for substrate - Google Patents

Abstract

The application discloses a connector for substrate, which is used for being installed on the installation surface of a circuit substrate, has a height direction, a length direction and a width direction which are mutually orthogonal, and comprises: a peripheral wall projecting in a height direction from a mounting surface side of the circuit substrate toward a mating side of the mating connector, the peripheral wall having a side wall portion extending in a length direction and an end wall portion extending in a width direction; an assembly cavity which is formed by surrounding a side wall part and an end wall part and has a through shape with two open ends along the height direction; a plurality of terminals arranged in two rows and respectively retained on the two side wall portions; the armor piece is at least partially kept on the end wall part and comprises elastic limiting arms which protrude from two ends of the peripheral wall in the length direction into the assembling cavity; the assembly body is inserted into the assembly cavity along the height direction, the assembly body is upwards stopped at the peripheral wall along the height direction, and the elastic limiting arm is upwards stopped at the assembly body along the height direction.

Description

Connector for substrate

Technical Field

The present application relates to the field of connectors, and in particular, to a connector for a substrate.

Background

In the related art, reference is made to chinese utility model CN211404836U, which discloses a connector device assembly composed of a receptacle connector (connector device for a circuit board) and a mating connector or plug connector fitted to the receptacle connector.

Wherein the receptacle connector includes a housing having a height direction, a length direction, and a width direction that are orthogonal to each other; and a terminal and a reinforcing metal member held by the housing. The housing has: a projecting wall projecting in the height direction from the mounting surface side toward a fitting side with the mating connector; and a peripheral wall that protrudes in the height direction from the mounting surface side toward a fitting side with the mating connector, has a length portion extending in the length direction and a width portion extending in the width direction, and surrounds a periphery of the protruding wall; and a receiving portion that is located between the protruding wall and the peripheral wall in the longitudinal direction and the width direction, and that is recessed in the height direction from a fitting side with the mating connector toward the mounting surface side. The terminal and the reinforcing metal fitting are held by being integrally molded (insert-molded) with the housing.

Each of the terminals is formed by punching and bending a plate-shaped metal sheet, and includes: a base; a contact arm portion extending from one end of the base portion in a height direction 'α' toward a fitting side with the plug connector, in other words, rising from a mounting surface side toward the fitting side with the plug connector; an inverted U-shaped held portion extending from the other end of the base portion in the height direction "α" toward the fitting side with the plug connector and toward the mounting surface side; and a connecting portion which can be soldered to a mounting surface formed at an end of the held portion. The contact arm portion is formed to be elastically deformable, and is provided at a free end thereof with a forwardly-projecting elastic contact portion.

However, in the prior art, the contact arm of the terminal needs to be elastically deformed, and when the contact arm is integrally formed with the housing, a gap needs to be formed between the contact arm and the housing, that is, when the contact arm is integrally formed, a mold core needs to be implanted between two sides of the contact arm in the width direction, and the mold core is pulled out after the integral formation, so that the gap is formed between the two sides of the contact arm in the width direction and the housing.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a connector for a substrate, which is advantageous for miniaturization design.

In order to achieve the above purpose, the present application provides the following technical solutions:

a connector for a substrate, which is used for mounting on a mounting surface of a circuit substrate, has a height direction, a length direction and a width direction which are orthogonal to each other, and comprises:

a peripheral wall projecting in the height direction from a mounting surface side of the circuit substrate toward a mating side of the mating connector, the peripheral wall having a side wall portion extending in the length direction and an end wall portion extending in the width direction;

an assembly chamber which is formed by surrounding the side wall part and the end wall part and has a through shape with two open ends along the height direction;

the terminals are respectively arranged and held on the two side wall parts in two rows, and each terminal comprises a fixing section, an elastic section and a butt joint section, wherein the fixing section is held with the side wall parts, the elastic section extends from the fixing section and is at least partially positioned in the assembly cavity, and the butt joint section extends from the fixing section to the outside of the peripheral wall;

the armor piece is at least partially kept on the end wall part and comprises elastic limiting arms which protrude from two ends of the peripheral wall in the length direction into the assembling cavity;

the assembly body is inserted into the assembly cavity along the height direction, the assembly body is upwards stopped at the peripheral wall along the height direction, and the elastic limiting arm is upwards stopped at the assembly body along the height direction;

the assembly body is spaced apart from the elastic sections of at least two adjacent terminals along the length direction and/or the width direction;

and the butting cavity is positioned between the assembly body and the peripheral wall along the length direction and the width direction, and forms an annular butting cavity from the mounting surface side of the circuit substrate to the opening at the embedding side of the butting connector, and the butting cavity is used for accommodating the butting connector.

Further, the peripheral wall is provided with a lower surface facing the mounting surface of the circuit substrate, the two ends of the lower surface in the length direction are close to the assembly cavity, the positions of the two ends are recessed towards the embedding side of the butting connector to form step parts, and the two ends of the assembly in the length direction are provided with extension end parts which are correspondingly stopped and lapped on the step parts.

Further, the assembly body includes an island portion, and the extending end portion formed by extending both ends of the island portion in the length direction, the extending end portion is proximate to the mounting surface of the circuit substrate, and an end cavity of the docking cavity 100 is formed between an inner side surface of the end wall portion, an inner surface of the extending end portion away from the mounting surface of the circuit substrate in the height direction, and an end surface of the island portion in the length direction.

The elastic limiting arm comprises a first arm part extending along the height direction, a second arm part formed by extending one end, close to the mounting surface of the circuit substrate, of the first arm part along the length direction, and a third arm part formed by extending the free end of the second arm part towards the embedding side of the butting connector, wherein the first arm part, the second arm part and the third arm part form part of an end cavity of the butting cavity, a stop part is formed on the end surface of the island part along the length direction, a stop surface facing the mounting surface of the circuit substrate is formed on the stop part, and the free end of the third arm part is stopped at the stop surface.

Further, the stopper portion is formed by an end surface of the island portion in the length direction protruding outward.

Further, an end surface of the island portion in the longitudinal direction is recessed inward to form an accommodation groove, at least a part of the third arm portion is accommodated in the accommodation groove, and the accommodation groove forms the stopper surface facing an inner wall surface of the mounting surface of the circuit substrate.

Further, the extension tip is kept away from along direction of height the internal surface of circuit substrate's installation face is sunken towards circuit substrate's installation face direction and is formed with the groove of stepping down, the second arm at least part hold in the groove of stepping down.

Furthermore, two side surfaces of the island part along the length direction further extend along the width direction at the position close to the mounting surface of the circuit substrate to form extension side parts, side cavity bodies of the butt joint cavity are formed among the inner side surface of the side wall part, the inner surface of the extension side part and the side surface of the island part, and the end cavity body and the side cavity bodies jointly form the butt joint cavity; or,

the inner side surface of each side wall part further extends to form a side wall extension part along the width direction at the position close to the mounting surface of the circuit substrate, side cavities of the butt joint cavity are formed among the inner side surface of each side wall part, the inner surface of each side wall extension part and the side surfaces of the island part along the length direction, and the end cavities and the side cavities jointly form the butt joint cavity.

Furthermore, the inner side surface of each side wall part further extends along the width direction at a position close to the mounting surface of the circuit substrate to form a side wall extension part, the extension side part is connected with the side wall extension part along the width direction, a side cavity of the butt joint cavity is formed among the inner side surface of the side wall part, the inner surface of the extension side part, the inner surface of the side wall extension part and the side surfaces of the island part along the length direction, and the end cavity and the side cavity jointly form the butt joint cavity;

the extension side part and the side wall extension part are in addiction fit along the width direction;

a displacement groove is formed on the side surface of the extending side part and/or the island part, and the distance L2 between the part of the elastic section of at least one terminal extending along the height direction and the inner wall of the displacement groove is not more than 0.05mm; and the minimum distance between one side of the elastic section of at least one terminal and the inner wall of the displacement groove along the length direction is L1, and the L1 is not more than 0.02mm.

Compared with the prior art, the beneficial effects of this application are: is beneficial to miniaturization design.

Drawings

Fig. 1 is a perspective view of a connector for a substrate according to the present invention.

Fig. 2 is a perspective view of fig. 1 from another angle.

Fig. 3 is a plan view of the substrate connector according to the present invention.

Fig. 4 is a plan view of the substrate connector of the present invention, further showing a plan view when the assembled body is separated from the peripheral wall.

Fig. 5 is a partially exploded perspective view of the substrate connector of the present application, particularly illustrating the assembled body, the armor piece, and a perspective view of one of the terminals when the assembled body is separated from the insulative housing.

Fig. 6 is a partially exploded perspective view of the substrate connector of the present invention, showing in detail the perspective view of the assembled body separated from the peripheral wall.

Fig. 7 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3.

Fig. 8 is an enlarged view of the structure within the dashed box in fig. 7.

Fig. 9 is a sectional view taken along line B-B in fig. 3.

Fig. 10 is a method diagram of the structure within the dashed box of fig. 3.

Fig. 11 is a perspective view of a second embodiment of the connector for a substrate.

Fig. 12 is an exploded perspective view of fig. 11.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 to 10, a first embodiment of a substrate connector disclosed in the present application is a substrate connector, which is used for a mounting surface (not shown) of a circuit substrate and has a height direction, a length direction and a width direction orthogonal to each other. The connector for a substrate includes an insulating body (not numbered), a plurality of terminals 2 coupled to the insulating body, and two armor pieces 3 coupled to both ends of the insulating body in a longitudinal direction.

Wherein the insulating body comprises a peripheral wall 1 and an assembly 4 which are combined by mutual assembly. The peripheral wall 1 projects in the height direction from the mounting surface side of the circuit board toward the mating side of the mating connector (not shown), and has a side wall portion 11 extending in the length direction and an end wall portion 12 extending in the width direction. The side wall part 11 and the end wall part 12 jointly enclose an assembly cavity 10 with two open ends along the height direction.

Referring to fig. 5 and 6, a plurality of the terminals 2 are respectively arranged and held on two side wall portions 11 in two rows, and each of the terminals 2 includes a fixing section 21 held with the side wall portion 11, an elastic section 22 extending from the fixing section 21 and located in the assembly cavity 10, and an abutting section 23 extending from the fixing section 21 to the outside of the peripheral wall 1. The free ends of the spring segments 22 form contact portions 221 for electrical contact with a mating connector. The butt joint section 23 is used for being welded and fixed with the mounting surface of the circuit substrate. In the present application, the terminal 2 and the side wall portion 11 are fixed by integral injection molding.

Referring to fig. 5 in combination with fig. 1 and 6 to 8, the armor member 3 is formed by stamping and bending a metal plate, and includes a main body (not numbered) and an elastic limiting arm 31 connected to the main body. The main body portion includes a top plate portion 32 at least partially covering the surface of the end wall portion 12 on the side away from the mounting surface of the circuit board in the height direction, side plate portions 33 formed by bending and extending both ends of the top plate portion 32 in the width direction toward the mounting surface of the circuit board, an end plate portion 34 formed by bending and extending the outer end edge of the top plate portion 32 away from the assembly cavity 10 in the length direction toward the mounting surface of the circuit board, and the elastic stopper arm 31 formed by bending and extending the inner end edge of the top plate portion 32 adjacent to the assembly cavity 10 in the length direction toward the mounting surface of the circuit board. The side plate part 33 is folded back in the length direction away from the outer end edge of the assembly cavity 10 to form a fixing leg 331. In this application, the armor member 3 is fixed to both ends position of perisporium 1 along length direction through integrative moulding plastics. The fixing feet 331 are correspondingly embedded in the peripheral wall 1. The side plate portions 33 cover at least part of the outer surfaces of both ends of the side wall portion 11 in the longitudinal direction. The end plate portion 34 covers at least part of the outer surface of the end wall portion 12 on the side away from the mounting surface of the circuit substrate in the longitudinal direction.

Referring to fig. 5 to 8, the elastic limiting arm 31 protrudes into the assembly cavity 10, and includes a first arm 311 integrally connected to the top plate 32 and extending along the height direction, a second arm 312 formed by extending along the length direction from an end of the first arm 311 adjacent to the mounting surface of the circuit board, and a third arm 313 formed by extending from a free end of the second arm 312 toward the mating side of the mating connector. The first arm portion 311 covers at least a portion of the inner side surface of the end wall portion 12 in the assembly chamber 10. The elastic stopper arm 31 is substantially U-shaped as a whole.

As shown in fig. 4 to 8, the assembly 4 includes an island 41 extending along the length direction, and an extending end 40 formed by extending two ends of the island 41 along the length direction, wherein the extending end 40 is adjacent to the mounting surface of the circuit substrate, that is, the extending end 40 is formed by extending end surfaces 411 of two ends of the island 41 along the length direction at positions adjacent to the mounting surface of the circuit substrate. An annular docking cavity 100 is formed between the island 41 of the assembly 4 and the peripheral wall 1 in the length direction and the width direction from the mounting surface side of the circuit board to the opening on the fitting side of the docking connector, and the docking cavity 100 is used for accommodating the docking connector.

The end face 411 of the island 41 is recessed inward to form a receiving groove 400, and the island 41 forms a stopper 410 at a position of the receiving groove 400 away from the mounting surface of the circuit board and a stopper surface 4101 facing the mounting surface of the circuit board. The housing groove 400 penetrates the island 41 in the mounting surface direction of the circuit board. At least a portion of the third arm 313 is received in the receiving groove 400. The free end of the third arm 313 stops at the stop surface 4101.

In this application, further, extension tip 40 is kept away from along the direction of height the internal surface 401 of circuit substrate's installation face is sunken towards circuit substrate's installation face direction and is formed with the groove of stepping down 402, at least part of second arm 312 hold in the groove of stepping down 402. In a preferred embodiment, the relief groove 402 is a through groove extending in the height direction. An end cavity of the docking cavity 100 is formed between the inner surface 120 of the end wall 12 (which may be understood as the inner surface of the first arm 311), the inner surface 401 of the extending end 40 away from the mounting surface of the circuit board in the height direction (which may be understood as the inner surface of the second arm 312), and the end surface 411 of the island 41 in the length direction (which may be understood as the inner surface of the third arm 312).

In another embodiment (not shown), the stop portion 410 may be formed to protrude outward from the end surface 411 of the island 41 in the longitudinal direction to form a boss shape or a rib shape, and the stop portion 410 may also form a stop surface 4101 facing the mounting surface of the circuit substrate.

Referring to fig. 4 to 10, a first embodiment is: the island 41 has two side surfaces 413 on both sides in the longitudinal direction, and an extension side 42 is formed to extend in the width direction at a position adjacent to the mounting surface of the circuit board. The inner surface 110 of each side wall portion 11 is further extended in the width direction at a position adjacent to the mounting surface of the circuit board to form a side wall extension portion 111. The extension side 42 is connected to the sidewall extension 111 along the width direction (e.g., the extension side 42 and the sidewall extension 111 are over-fitted along the width direction). Side cavities (not numbered) of the docking cavity 100 are formed among the inner side surface 110 of the side wall portion 11, the inner surface 421 of the extension side portion 42, the inner surface 1111 of the side wall extension portion 111, and the side surfaces 413 at both sides of the island portion 41 in the length direction.

The second embodiment is: the island 41 has two side surfaces 413 on both sides in the longitudinal direction, and an extension side 42 is formed to extend in the width direction at a position adjacent to the mounting surface of the circuit board. The side wall portion 11 is not provided with the side wall extension portion 111. The extended side portion 42 is directly contiguous to the inner surface 110 of the side wall portion 11 in the width direction. A side cavity (not numbered) of the docking cavity 100 is formed between the inner side surface 110 of the side wall 11, the inner surface 421 of the extending side 42, and the side surfaces 413 of the island 41 on both sides in the longitudinal direction. In this embodiment, the effective elastic length of the elastic section 22 of the terminal 2 is longer than that of the first embodiment.

The third embodiment is: the inner side surface 110 of the side wall portion 11 is further extended in the width direction at a position adjacent to the mounting surface of the circuit board to form a side wall extension portion 111, and the island portion 41 is not provided with the extension side portion 42. The sidewall extension 111 is directly connected to the side 413 of the island 41 in the width direction. Side cavities (not numbered) of the docking cavity 100 are formed between the inner side 110 of the sidewall portion 11, the inner surface 1111 of the sidewall extension 111, and the side 413 of the island portion 41. In this embodiment, the effective elastic length of the elastic section 22 of the terminal 2 is shorter than that of the first embodiment.

The end and side cavities together form the docking cavity 100. In the present application, the assembly 4 and the peripheral wall 1 are preferably connected in the width direction in an overdose fit (otherwise referred to as a tight fit).

In the present application, the peripheral wall 1 is formed with a lower surface 101 facing the mounting surface of the circuit substrate, and the lower surface 101 is formed with a stepped portion 102 recessed toward the mating side of the mating connector at a position adjacent to the assembly cavity 10 at both ends in the longitudinal direction. The assembly 4 is inserted into the assembly cavity 10 of the peripheral wall 1 along the mounting surface side of the circuit substrate toward the fitting side of the mating connector; in this process, the third arm 313 passes over the stop portion 410 until the free end of the third arm 313 stops at the stop surface 4101, thereby completing the assembly; at this time, the extension end 40 is engaged with the step 102, and the assembly is completed. The bottom surface (not numbered) of the assembly 4 facing the mounting surface of the circuit substrate is substantially flush with the lower surface 101 of the peripheral wall 1. Preferably, a gap (not numbered, refer to fig. 9) is formed between a bottom surface (not numbered) of the assembly 4 facing the mounting surface of the circuit substrate and the mounting surface of the circuit substrate, for absorbing manufacturing and assembly tolerances between the assembly 4 and the peripheral wall 1. When the substrate connector is soldered to the mounting surface of the circuit substrate, the lower surface 101 of the peripheral wall 1 serves as a mounting reference surface.

Of course, in other embodiments, the extending end portion 40 may be formed at both sides of the island portion 41 in the longitudinal direction except for the arrangement region of the terminals 2; at this time, the extended end portion 40 is positioned on the lower surface of the side wall portion 11. Of course, the lower surface of the sidewall 11 corresponding to the extending end 40 can also be designed to have a structure similar to the step 102 in the above-mentioned embodiment.

Referring to fig. 1 to 9, a plurality of displacement grooves 403 are formed on the side 413 of the extending side portion 42 and/or the island portion 41, the elastic segments 22 of the terminals 2 correspond to the displacement grooves 403 one by one and are at least partially accommodated in the displacement grooves 403, a distance L1 between a position of the elastic segment 22 of the terminal 2 adjacent to the fixing segment 21 and an inner wall of the displacement groove 403 is a minimum distance between the elastic segment 22 and the displacement groove 403, the distance L1 can be not greater than 0.02mm, and in this case, the distance L1 is equal to 0.015mm. The elastic segment 22 of terminal 2 is along the biggest interval between the inner wall of the part that the direction of height extends and the groove 403 that shifts L2 for elastic segment 22 and the groove 403 that shifts, L2 can accomplish to be not more than 0.05mm, in this application example, L2 equals 0.045mm.

Referring to fig. 11 and 12, a second embodiment of the connector for a substrate disclosed in the present application is shown, and the only difference between the second embodiment and the first embodiment (fig. 1 to 10) is that in the second embodiment, the armor 3 is assembled and fixed to the peripheral wall 1, specifically, the armor 3 is assembled and fixed to the peripheral wall 1 from top to bottom, and the assembly 4 is inserted and assembled to the peripheral wall 1 from bottom to top. Of course, due to the assembled structure of the armor piece 3, the structure of the fixing feet 331 is removed from the armor piece 3.

Through this application example, can make the elastic segment 22 of terminal 2 and shift the interval between the groove 403 inner wall and accomplish extremely minimumly, and do not influence elastic segment 22 elastic deformation, can realize higher manufacturing yield simultaneously, the connector for the base plate of the department of making through this application practical example has higher overall structure stability simultaneously.

Claims (10)

1. A connector for a substrate, which is used for being mounted on a mounting surface of a circuit substrate and has a height direction, a length direction and a width direction which are orthogonal to each other, is characterized by comprising:

a peripheral wall projecting in the height direction from a mounting surface side of the circuit substrate toward a mating side of a mating connector, the peripheral wall having a side wall portion extending in the length direction and an end wall portion extending in the width direction;

an assembly chamber defined by the side wall portion and the end wall portion and having a through shape with both ends open in the height direction;

a plurality of terminals arranged and held on the peripheral wall;

the armor piece is at least partially kept at two ends of the peripheral wall along the length direction and is positioned outside the arrangement areas of the terminals, and the armor piece comprises an elastic limiting arm at least partially protruding into the assembly cavity;

an assembly body inserted and assembled into the assembly cavity along the height direction, wherein an extending end part is formed on the assembly body along the length direction and/or the width direction, the extending end part is positioned on one side of the mounting surface of the circuit substrate along the height direction, and the extending end part is positioned on the peripheral wall along the height direction;

the elastic limiting arm is abutted against the assembly body and used for limiting the assembly body to be separated from the peripheral wall;

and the butting cavity is positioned between the assembly body and the peripheral wall along the length direction and the width direction, and is formed into a ring shape from the mounting surface side of the circuit substrate to the opening of the embedding side of the butting connector, and the butting cavity is used for accommodating the butting connector.

2. The connector of claim 1, wherein a plurality of the terminals are retained in two rows on the two side wall portions, each of the terminals includes a fixing portion retained by the side wall portion, an elastic portion extending from the fixing portion and at least partially located in the assembly cavity, and an abutting portion extending from the fixing portion and outside the peripheral wall, and the assembly body is spaced apart from the elastic portions of at least two adjacent terminals along the length direction and/or the width direction.

3. The connector for a substrate according to claim 1, wherein the peripheral wall is formed with a lower surface facing the mounting surface of the circuit substrate, the lower surface is recessed toward a fitting side of the mating connector at a position adjacent to the assembly cavity at both ends in the longitudinal direction to form a step portion, and both ends of the assembly in the longitudinal direction form the extended end portion to be engaged with the step portion in correspondence to the stopper.

4. The connector for a substrate according to claim 3, wherein the assembly body includes an island portion, and the extending end portions formed by extending both ends of the island portion in the longitudinal direction, the extending end portions being in close proximity to the mounting surface of the circuit substrate, and end cavities of the mating cavity 100 are formed between an inner side surface of the end wall portion, an inner surface of the extending end portion that is apart from the mounting surface of the circuit substrate in the height direction, and end surfaces of the island portion in the longitudinal direction.

5. The connector for a substrate according to claim 4, wherein the elastic stopper arm includes a first arm portion extending in the height direction, a second arm portion formed by extending in the length direction from an end of the first arm portion adjacent to the mounting surface of the circuit substrate, and a third arm portion formed by extending from a free end of the second arm portion toward the fitting side of the mating connector, the first arm portion, the second arm portion, and the third arm portion form a part of an end cavity of the mating cavity, a stopper portion is formed on an end surface of the island portion in the length direction, the stopper portion forms a stopper surface facing the mounting surface of the circuit substrate, and a free end of the third arm portion is stopped at the stopper surface.

6. The connector for a substrate according to claim 5, wherein a stopper is formed by an end surface in a longitudinal direction of the island portion projecting outward.

7. The connector for a substrate according to claim 5, wherein an end surface of the island portion in a longitudinal direction is recessed inward to form a receiving groove, at least a part of the third arm portion is received in the receiving groove, and an inner wall surface of the receiving groove facing the mounting surface of the circuit substrate forms the stopper surface.

8. The connector according to claim 5, 6 or 7, wherein the extending end portion is recessed in a direction toward the mounting surface of the circuit board from an inner surface of the extending end portion away from the mounting surface of the circuit board in a height direction, and the second arm portion is at least partially accommodated in the recess.

9. The connector for a substrate according to any one of claims 4 to 7, wherein two side surfaces of both sides of the island portion in the longitudinal direction are further extended in the width direction at a position adjacent to the mounting surface of the circuit substrate to form an extended side portion, side cavities of the mating cavity are formed between an inner side surface of the side wall portion, an inner surface of the extended side portion, and the side surfaces of the island portion, and the end cavity and the side cavities together constitute the mating cavity;

or the inner side surface of each side wall part further extends along the width direction at the position close to the mounting surface of the circuit substrate to form a side wall extension part, a side cavity of the butt joint cavity is formed among the inner side surface of the side wall part, the inner surface of the side wall extension part and the side surfaces of the island part along the length direction, and the end cavity and the side cavity jointly form the butt joint cavity.

10. The connector for a substrate according to any one of claims 4 to 7, wherein a side wall extension portion is further formed on an inner side surface of each of the side wall portions so as to extend in a width direction at a position adjacent to the mounting surface of the circuit substrate, the side wall extension portion is connected to the side wall extension portion in the width direction, a side cavity of the mating cavity is formed between the inner side surface of the side wall portion, an inner surface of the side wall extension portion, and side surfaces of the island portion at both sides in a length direction, and the end cavity and the side cavity together constitute the mating cavity;

the extension side part and the side wall extension part are in addiction fit along the width direction;

a displacement groove is formed on the side surface of the extending side part and/or the island part, and the distance L2 between the part of the elastic section of at least one terminal extending along the height direction and the inner wall of the displacement groove is not more than 0.05mm; and the minimum distance between one side of the elastic section of at least one terminal and the inner wall of the displacement groove along the length direction is L1, and the L1 is not more than 0.02mm.

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