CN114336115B

CN114336115B - Connector for substrate

Info

Publication number: CN114336115B
Application number: CN202111625654.XA
Authority: CN
Inventors: 邰军
Original assignee: Kunshan Jiahua Electronics Co Ltd
Current assignee: Kunshan Jiahua Electronics Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2024-04-16
Anticipated expiration: 2041-12-28
Also published as: CN114336115A

Abstract

The application discloses a connector for a substrate, which comprises a rectangular shell provided with a plurality of signal terminals and a reinforcing metal piece in a top view; the shell is provided with a bottom wall, a pair of short walls which are erected at two ends of the bottom wall in the long side direction, a pair of long walls which are erected at two ends of the bottom wall in the short side direction, and an island wall which is erected at the middle part of the bottom wall, wherein the bottom wall, the pair of short walls, the pair of long walls and the island wall are jointly surrounded to form an annular insertion cavity with an upward opening; the first metal piece comprises a bottom plate piece integrally combined in the bottom wall, a transition fixing piece integrally combined in the short wall and extending from the bottom plate piece, and a cantilever-shaped elastic arm formed by further extending the transition fixing piece, wherein the elastic arm is formed by extending the inner side surface of the short wall into the insertion cavity along the long side direction of the shell.

Description

Connector for substrate

Technical Field

The present application relates to the field of electrical connectors, and more particularly, to a connector for a substrate.

Background

With miniaturization of electronic products, components mounted on the electronic products become precisely degenerated to be smaller and smaller. For example, a Board-to-Board (BTB) connector for electrically connecting two circuit boards is mounted in a smart phone or a digital camera. With miniaturization of a smart phone or a digital camera, a receptacle connector (RECEPTACLE CONNECTOR) constituting a BTB connector and a plug connector (plug connector) combined with the receptacle connector achieve simplification in a manner of having an ultra-narrow width (ultra-narrow width) of several millimeters.

Board-to-board connectors are generally composed of two parts, a plug connector and a socket connector, both of which are composed of a plastic body and signal terminals held on the plastic body, the plastic body mainly plays a role of insulating and positioning the signal terminals, and the signal terminals mainly play a role of transmitting signals. In general, the existing plug connector and socket connector also add a protective bracket to increase its strength, and the protective bracket also can serve as a holding force when the plug connector and socket connector are mated, wherein the protective bracket can also be used as a current terminal in some prior arts. Therefore, the requirements on the combination strength of the protective bracket and the plastic body, the length of the arm of force of the elastic arm on the protective bracket, the overall structural strength and stability of the board-to-board connector combined with the protective bracket are high, and the like, especially under the design trend of increasingly miniaturization of the board-to-board connector nowadays.

Therefore, a new design form is necessary to achieve better effects.

Disclosure of Invention

The application provides a novel connector for a substrate, which has a stable contact point structure and a rigid structure.

In order to achieve the purpose, the application provides the following technical scheme:

a connector for a substrate for fitting to a substrate,

A reinforcement metal member provided with a rectangular housing in plan view and provided with a plurality of signal terminals and reinforcing both ends of the housing in the longitudinal direction;

The housing has: a bottom wall, a pair of short walls standing up at both ends of the bottom wall in a longitudinal direction, a pair of long walls standing up at both ends of the bottom wall in a short direction, and an island-shaped island wall standing up at a middle portion of the bottom wall and enclosed by the pair of short walls and the pair of long walls, the bottom wall, the pair of short walls, the pair of long walls, and the island wall being collectively enclosed to form an annular insertion cavity with an upward opening;

the signal terminals are arranged and combined on the long wall, and each signal terminal is provided with an elastic contact part which at least partially protrudes into the insertion cavity and a substrate part which extends out of the shell and is used for electrically contacting with the substrate;

The reinforced metal piece comprises a first metal piece, the first metal piece is combined with the shell through injection molding, the reinforced metal piece comprises a bottom plate piece integrally combined in the bottom wall, a transition fixing piece integrally combined in the short wall and a cantilever-shaped elastic arm formed by the transition fixing piece in a further extending mode, the elastic arm is formed by extending the inner side face of the short wall into the insertion cavity along the long side direction of the shell, a gap is formed between the elastic arm and the inner wall face of the adjacent long wall at two ends of the adjacent long wall along the long side direction of the shell, and the elastic arm is used for being electrically connected with the butt connector.

Further, the reinforcing metal piece further comprises a second metal piece which is mutually independent from the first metal piece, the second metal piece is combined with the shell through assembly, the reinforcing metal piece comprises an end plate part which covers the upper surface of the short wall, an upper plate part which is formed by the end plate part in a way that two ends of the end plate part along the short side direction of the shell extend further towards the long side direction of the shell, and the upper plate part corresponds to the upper surface which covers two ends of the long wall along the long side direction of the shell, the upper part of the gap and the upper part of at least part of the elastic arm.

Further, the edge of the upper plate part, which is positioned at one side of the insertion cavity, of the end plate part is provided with a guide surface which is in seamless connection.

Further, the bottom plate member is further formed with first holding portions extending and bending along both ends of the housing in the short side direction, and the first holding portions cover the upper surface, the outer surface, and the inner surface of the long wall at both ends of the housing in the long side direction.

Further, the outer surfaces of both ends of the long wall in the long side direction of the housing are formed with clamping portions which embed the free ends of the first holding portions therein, the free ends of the first holding portions being exposed downward to the housing.

Further, the first holding portion and the upper plate portion are arranged side by side on the upper surface of the housing in the longitudinal direction of the housing, and the upper surface of the first holding portion is not higher than the upper surface of the upper plate portion in the up-down direction.

Further, the bottom plate member is further extended and bent along one end of the long side direction of the housing to form a second holding portion, the second holding portion covers the end face of the island wall along the long side direction of the housing, the second holding portion further comprises an extending protection portion extending to cover two end positions of the upper surface of the island wall along the long side direction of the housing, in the up-down direction, the upper surface of the first holding portion is higher than the upper surface of the island wall, and the upper surface of the island wall is higher than the upper surface of a portion of the long wall combined with the plurality of signal terminals.

Further, the upper plate portion is extended to form an upper plate outer side protection portion covering at least a part of the outer surface of the long wall, and the upper plate outer side protection portion is extended to form a butt joint portion corresponding to the combination with the substrate, the bottom plate member is extended to form at least one butt joint portion corresponding to the combination with the substrate along both ends of the long side direction of the housing, and the at least one butt joint portion and the butt joint portion are arranged side by side along the long side direction of the housing.

Further, the first metal piece and the second metal piece are not in electrical contact.

Further, positioning grooves are formed on the lower surfaces of the two ends of the shell along the long side direction;

Part of the transition fixing piece is exposed into the positioning groove to form a first positioning surface, and the first positioning surface is formed at the connecting position of the transition fixing piece and the bottom plate piece;

Part of the elastic arm is exposed into the positioning groove to form a second positioning surface, and the second positioning surface is formed at the connection position of the transition fixing piece and the elastic arm;

the plane where the first positioning surface is located intersects with the plane where the second positioning surface is located.

Compared with the prior art, the application has the beneficial effects that: has stable contact point structure and rigid structure.

Drawings

Fig. 1 is a schematic perspective view of a connector for a substrate of the present application.

Fig. 2 is a schematic partial perspective view of the connector for a substrate of the present application, specifically, a schematic perspective view of two second metal pieces and one first metal piece separated from a housing.

Fig. 3 is a top view of the connector for a substrate of the present application, specifically showing a top view of a second metal member separated from a housing.

Fig. 4 is a bottom view of the connector for a substrate of the present application.

Fig. 5 is a side view of the connector for a substrate of the present application.

Fig. 6 is an enlarged view of the structure within the dashed box in fig. 5.

Fig. 7 is a perspective view of the connector for a substrate of the present application of fig. 1 from another angle, with an enlarged process for showing a partial detail, and with a partially symmetrical structure omitted.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

For the sake of accuracy of the description throughout, all references to directions are uniformly made to fig. 1, and the direction along the X axis is defined as the longitudinal direction of the bottom wall 11; the direction in which the Z axis is located is defined as the short side direction of the bottom wall 11; the direction in which the Y axis is located is defined as the up-down direction, with the Y axis forward direction being up.

Referring to fig. 1 to 7, a connector for a substrate according to the present application is generally assembled to a substrate (e.g. PCB board) for docking with a docking connector to realize signal transmission between the substrates. The connector for a substrate includes a housing 1 having a rectangular shape in a plan view, a plurality of signal terminals 3 coupled to the housing 1, and reinforcing metal members 2 for reinforcing both ends of the housing 1 in a longitudinal direction.

Referring to fig. 1 to 3, the housing 1 has: a bottom wall 11, a pair of short walls 12 erected at both ends in a longitudinal direction of the bottom wall 11, a pair of long walls 13 erected at both ends in a short direction of the bottom wall 11, and an island-shaped island wall 14 erected at a middle portion of the bottom wall 11 and enclosed by the pair of short walls 12 and the pair of long walls 13. The bottom wall 11, the pair of short walls 12, the pair of long walls 13 and the island wall 14 together enclose an annular insertion cavity 10 with an upward opening. The insertion cavity 10 is used for insertion and extraction of the mating connector.

The signal terminals 3 are respectively arranged and combined on the two long walls 13 in two rows, and each signal terminal 3 comprises a fixing portion 30 correspondingly and fixedly combined with the long wall 13, an elastic contact portion 31 formed by extending the fixing portion 30 and partially protruding into the insertion cavity 10, and a substrate portion 32 extending from the fixing portion 30 to the outside of the housing 1 and correspondingly electrically contacted with the substrate. In the present application, the signal terminal 3 is coupled to the housing 1 by assembly.

Referring to fig. 1 and 2, the reinforcing metal piece 2 includes a first metal piece 21 and a second metal piece 22 that are disposed independently of each other. Wherein said first metal piece 21 is joined to the housing 1 by injection moulding. The first metal member 21 includes a flat plate-like base member 211 integrally incorporated in the bottom wall 11, a transition fixing member 212 extending from the base member 211 and integrally incorporated in the short wall 12, and a cantilever-like elastic arm 213 formed by further extending the transition fixing member 212. The elastic arm 213 is formed by extending the inner side surface of the short wall 12 into the insertion chamber 10 along the longitudinal direction of the housing 1. The elastic arms 211 form a gap 20 with the inner wall surfaces of the adjacent long walls 13 at both end positions in the longitudinal direction of the housing 1. Two of the elastic arms 211 are located at both end positions of the insertion chamber 10 in the short side direction of the housing 1. The elastic arms 211 are used for elastic snap-fit or electrical connection with a mating connector (not shown).

The first metal piece 21 and the shell 1 are formed by integral injection molding, and the structural strength of the shell 1 can be enhanced to the greatest extent through the structure of the first metal piece 21, so that the shell has good rigidity.

The second metal member 22 is coupled to the housing 1 by assembly, and includes an end plate portion 221 covering the upper surface of the short wall 12, and an upper plate portion 222 formed by extending the end plate portion 221 further toward the long side direction of the housing 1 from both ends in the short side direction of the housing 1. The upper plate 222 covers the upper surface of the long wall 13 at both ends in the longitudinal direction of the housing 1, the upper portion of the gap 20, and at least a part of the elastic arm 213. The upper plate 222 and the end plate 221 have guide surfaces 2201 that are seamlessly connected to each other at the edge thereof on the side of the insertion chamber 10. The guide surface 2201 may have a chamfer structure formed by cutting the edges of the upper plate portion 222 and the end plate portion 221 obliquely; the flat cambered surface structure may be formed by stretching and bending the edges of the upper plate portion 222 and the end plate portion 221.

The upper plate portion 222 and the end plate portion 221 are used for both ends of the shield case 1 in the longitudinal direction, and particularly, can provide impact resistance and guiding effects when the mating connector is inserted.

As shown in fig. 2,3 and 6, the bottom plate 211 is further extended and bent along two ends of the housing 1 in the short side direction to form a first holding portion 2111, and the first holding portion 2111 covers the upper surface, the outer surface and the inner surface of the two ends of the long wall 13 in the long side direction of the housing 1. The first holding portion 2111 and the upper plate portion 222 are arranged side by side on the upper surface of the housing 1 in the longitudinal direction of the housing 1, and the upper surface of the first holding portion 2111 is not higher than the upper surface of the upper plate portion 222 in the up-down direction.

The first holding portion 2111 can make the first metal piece 21 more stable to be combined with the housing 1 on the one hand, and at the same time, can serve as an auxiliary guide when the mating connector is inserted into the insertion chamber 10 on the other hand. Since the edge portion of the upper plate portion 222 on the side close to the insertion chamber 10 (the portion including the guide surface 2201) is in a suspended structure in the up-down direction, it is very easy to be bumped and deformed during insertion of the mating connector, particularly at the chamfer position (the position of reference numeral 220 in fig. 1) inside the upper plate portion 222, while considering that the second metal member 22 needs to have an effect of preferential electrostatic discharge. Preferably, the upper surface of the first holding portion 2111 is slightly lower than the upper surface of the upper plate portion 222 in the up-down direction. The provision of the first holding portion 2111 can very effectively avoid the problem that the edge portion of the upper plate portion 222 on the side close to the insertion chamber 10 is damaged or irreversibly deformed.

As shown in fig. 2,4 and 7, the outer surfaces of the two ends of the long wall 13 along the long side direction of the housing 1 are formed with clamping portions 131, the clamping portions 131 embed the free ends of the first holding portions 2111, and the free ends of the first holding portions 2111 are exposed downward from the housing 1 for positioning the first metal member 21 by injection molding Shi Moren (not shown), and for enhancing the bonding strength between the first metal member 21 and the housing 1.

As shown in fig. 2, the bottom plate 211 further extends and bends at one end of the housing 1 along the longitudinal direction, and a second holding portion 2112 is formed, the second holding portion 2112 covers the end of the island wall 14 along the longitudinal direction of the housing 1, and the second holding portion 2112 further includes an extension protecting portion 2113 extending to cover the upper surface of the island wall 14 at two ends of the housing 1 along the longitudinal direction. In the up-down direction, one of the embodiments shown in the present application is: the upper surface of the extension protecting portion 2113 is flush with the upper surface of the island wall 14, the upper surface of the first holding portion 2111 is higher than the upper surface of the island wall 14, and the upper surface of the island wall 14 is higher than the upper surface of the portion of the long wall 13 where the plurality of signal terminals 3 are bonded. When the signal terminal 3 is mated with the mating connector, the mating connector can be ensured to be preferentially contacted with the second metal piece 22 for guiding insertion, and the signal terminal 3 can be ensured to be finally electrically contacted with the mating connector.

The bottom plate member 211 covers all positions of the insertion chamber 10 at both ends of the island wall 14 in the longitudinal direction of the housing 1, and is provided with a first holding portion 2111, a second holding portion 2112, an extension protecting portion 2113, and a portion of the first metal member 21 buried in the short wall 12 (refer to fig. 2 and fig. 1 and 3). The structural strength of the housing 1 can be enhanced to the greatest extent so as to have good rigidity.

As shown in fig. 1,2 and 7, the upper plate portion 222 is formed with an upper plate outer protection portion 2221 covering at least a part of the outer surface of the long wall 13, and a butt joint portion 2222 formed by the upper plate outer protection portion 2221 further extending and corresponding to the substrate being joined, the bottom plate member 211 is formed with at least one butt joint portion 2114 formed by the bottom plate member 211 further extending along both ends of the long side direction of the housing 1 and corresponding to the substrate being joined, and the at least one butt joint portion 2114 and the butt joint portion 2222 are arranged side by side along the long side direction of the housing 1. The first metal piece 21 and the second metal piece 22 are not in electrical contact.

Referring to fig. 2, 4 and 7, the lower surfaces of both ends of the housing 1 in the longitudinal direction are formed with positioning grooves 101. A part of the transition fixing piece 212 is exposed into the positioning groove 101 to form a first positioning surface 2121; a portion of the elastic arm 213 is exposed into the positioning groove 101 to form a second positioning surface 2131. In the present application, the first positioning surface 2121 is formed at a connection position of the transition fixing member 212 and the base plate member 211; the second positioning surface 2131 is formed at a connection position between the transition fixing piece 212 and the elastic arm 213, and a plane of the first positioning surface 2121 intersects with a plane of the second positioning surface 2131, preferably in a vertical state. When injection molding is performed, the first metal piece 21 is positioned by inserting the mold into the positioning groove 101 and correspondingly pressing the mold against the first positioning surface 2121 and the second positioning surface 2131. In the connector for a substrate of the present application, since the elastic arm 213 is designed to be long and directly extends from the inside of the short wall 12, the elastic arm 213 is easily deflected due to high temperature and the like during injection molding, and the elastic arm 213 can be positioned more precisely by designing the structure of the positioning groove 101. In more detail, the positioning groove 101 is formed on the lower surface of the short wall 12 adjacent to the bottom wall 11.

Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A connector for a substrate for fitting to a substrate, characterized by:

The reinforced metal piece comprises a first metal piece, wherein the first metal piece is combined with the shell through injection molding and comprises a bottom plate piece integrally combined in the bottom wall, a transition fixing piece which extends from the bottom plate piece and is integrally combined in the short wall, and a cantilever-shaped elastic arm which is formed by the transition fixing piece in a further extending mode, the elastic arm penetrates out of the inner side surface of the short wall and extends into the insertion cavity along the long side direction of the shell, a gap is formed between the elastic arm and the inner wall surface of the adjacent long wall at two ends of the shell along the long side direction, and the gap is upwards opened and is used for being electrically connected with the butt connector;

The reinforcing metal piece further comprises a second metal piece which is mutually independent with the first metal piece, the second metal piece is combined with the shell through assembly, the reinforcing metal piece comprises an end plate part which covers the upper surface of the short wall, an upper plate part which is formed by the end plate part in a way that two ends of the end plate part along the short side direction of the shell extend further towards the long side direction of the shell, and the upper plate part corresponds to the upper surface of the two ends of the long wall along the long side direction of the shell, the upper part of the gap and the upper part of at least part of the elastic arm.

2. The connector for a substrate according to claim 1, wherein: the edge of the upper plate part, which is positioned at one side of the insertion cavity, of the end plate part is provided with a guide surface which is in seamless connection.

3. The connector for a substrate according to claim 1, wherein: the bottom plate member is further extended and bent along two ends of the short side direction of the shell to form a first retaining part, and the first retaining part covers the upper surface, the outer surface and the inner surface of the two ends of the long wall along the long side direction of the shell.

4. A connector for a substrate according to claim 3, wherein: the outer surfaces of the two ends of the long wall along the long side direction of the shell are provided with clamping parts, the free ends of the first holding parts are buried in the clamping parts, and the free ends of the first holding parts are exposed out of the shell downwards.

5. The connector for a substrate according to claim 4, wherein: the first retaining part and the upper plate part are arranged on the upper surface of the shell side by side along the long side direction of the shell, and the upper surface of the first retaining part is not higher than the upper surface of the upper plate part along the up-down direction.

6. A connector for a substrate according to claim 3, wherein: the bottom plate piece is further extended and bent along one end of the long side direction of the shell to form a second retaining part, the second retaining part covers the end face of the island wall along the long side direction of the shell, the second retaining part further comprises an extending protection part which extends to cover the two ends of the upper surface of the island wall along the long side direction of the shell, the upper surface of the first retaining part is higher than the upper surface of the island wall along the up-down direction, and the upper surface of the island wall is higher than the upper surface of a part of the long wall combined with a plurality of signal terminals.

7. The connector for a substrate according to claim 1, wherein: the upper plate part extends to form an upper plate outer side protection part covering at least part of the outer surface of the long wall, and the upper plate outer side protection part further extends to form a butt joint part corresponding to the combination with the substrate, the two ends of the bottom plate piece along the long side direction of the shell further extend to form at least one butt joint part corresponding to the combination with the substrate, and the at least one butt joint part and the butt joint part are arranged side by side along the long side direction of the shell.

8. The connector for a substrate according to claim 1, wherein: the first metal piece and the second metal piece are not in electrical contact.

9. The connector for a substrate according to any one of claims 1 to 8, wherein:

positioning grooves are formed on the lower surfaces of the two ends of the shell along the long side direction;