JPH0982429A - Card edge connector and fixing device for card edge connector used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card edge connector capable of being mounted in a relatively narrow mounting area and a fixing device for a card edge connector therefor. SOLUTION: A pair of metal-made members 50 are mounted in the both-side end walls 21 of the slender housing 20 of a card edge connector 10. The metal- made members 50 are formed by bending one sheet of a metal plate, and the top side of an intermediate part is bent in a U-shaped form to constitute an inner wall and an outer wall. A fixing part soldered to a parent board is formed in the inner wall, and an elastic arm including a latch part 52 is formed in the outer wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card edge connector used for connecting a child board to a parent board and a fixing device for the card edge connector used therein.

[0002]

2. Description of the Related Art Conventionally, a technique for mounting a semiconductor device including a memory on a sub-board and connecting the sub-board to a main board, mainly for expansion of the memory in the computer field. It has been known. Card edge connectors are often used to connect the two.
The card edge connector has a pair of posts formed at positions lateral to the fitting surface of the housing, has a substantially U-shape, and has engaging means near the ends of the posts.

An example of a conventional connector of this type is the actual open sho 6-.
It is disclosed in Japanese Patent No. 88073. This connector has a metal latch member near the end of a resinous post. The metal latch member integrally has an operating portion and a locking portion. The metal latch member has tines that are secured within the posts and soldered to pads on the substrate.

This type of card edge connector has a pair of posts formed laterally on the mating surface as described above. This post is for placing the child board in a correct position and holding it. Since this post requires a desired strength, the resin must have an appropriate wall thickness. For this reason, the width of the housing becomes relatively wide, so that a relatively large area is required for mounting the card edge connector. Therefore, there has been a demand for a more compact card edge connector and a fixing device therefor.

[0005]

According to the present invention, there is provided a substantially U-shaped card edge connector having a pair of arms at both ends of an insulating housing body having a large number of contacts, which is mounted on the surface of a mother board. A pair of arms is made of metal fitted to both outer ends of the insulating housing body, and each arm is integrally provided with a fixing portion to the parent board and a latch portion of a child board connected to the parent board. It is characterized by having in.

According to the present invention, in a fixing device for a card edge connector, in which a child board is arranged substantially parallel to a parent board and interconnected, a fixing portion to the parent board, a latch portion of the child board, and the card. It is characterized in that it is a metal integrated structure having a mounting portion that is fitted to the outer end of the housing of the edge connector.

The card edge connector of the present invention comprises a slender resin housing in which contacts are arranged at a predetermined pitch, and a pair of metal members (fixing device) extending from a lateral position of the resin housing toward the fitting direction. ) Has. The metal member has a fixed wall and a flexible portion. The fixed wall functions to fix the card edge connector to the mother board, and the flexible portion has a latch portion that engages with a recess formed in the mother board.
Further, the fixed wall limits the bending of the flexible portion and prevents the flexible portion from being deformed due to excessive bending.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A card edge connector and a fixing device for a card edge connector according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1A to 1C, in the card edge connector 10, a plurality of contacts 30 are arranged in a slender housing 20 at a predetermined pitch. The contacts 30 are arranged in a staggered manner in two rows above and below,
The soldering tines 31 of each contact 30 are the housing 2
Extends around 0. A pair of metal members (fixing device for card edge connector) 50 are attached to both end walls 21 of the housing 20. Further, a positioning post 40 is formed on the bottom surface of the housing 20 for attachment to the mother board.

FIG. 2 shows the metal member 50 on one side. The metal member 50 is formed by bending a single metal plate, and has an attachment portion 51 for attaching to the housing 20, a latch portion 52, an operation portion 53, and a U-shaped intermediate portion 54. The mounting portion 51 has an engagement hole 59 that engages with the protrusion 26 formed on the side wall of the housing 20 as described later.
including. The middle portion 54 constitutes an inner wall 60 and an outer wall 70 by U-bending.

As shown in FIG. 2C, the above-mentioned latch portion 5 is provided.
2 and the operating portion 53 are located near the end of an elastic arm 72 formed by providing a slot 71 in the outer wall 70. The latch part 52 has an inclined surface 55 and a locking surface 56 as shown in FIG. 2D, and is formed so as to curve and project inward as shown in FIG. 2B. The operation unit 53 is the latch unit 52.
Located on the edge side of.

The intermediate portion 54 is U on the side opposite to the main board, that is, on the top side.
It is bent to form a curved surface 57. The inner wall 60 has a fixed portion 61 on the front end side that is soldered to the mother board. Figure 2 (b)
As described above, the fixing portion 61 is formed so as to extend inward from the inner wall 60. Further, a tab 62 extending in the longitudinal direction is formed on the rear side of the inner wall 60 as shown in FIGS. 2 (a) and 2 (b). The tab 62 is formed by bending the lower end of the inner wall 60 inwardly at a substantially right angle, and is configured to incline toward the front end. In addition, a stop tab 63 is formed at the front end of the fixed portion 61 to extend forward and prevent the elastic arm 72 from bending downward.

As shown in FIG. 1B, the mounting portion 51 is arranged so as to surround the rail from above and below so as to be fixed to the rail formed at the side end of the housing 20. At this time, the projections formed on both side wall surfaces of the housing 20 and the engaging holes 59 engage with each other as described above.

FIG. 4 discloses an example of a rail for fixing the metal member 50 in a part of the housing 20. According to FIG. 4B, the rail 330 has a substantially T-shaped cross section so as to engage with the mounting portion 51 (see FIG. 1B). The outer end surface 331 of the rail 330 has an engaging hole 59 for the metal member 50.
And a rib 333 extending between the pair of protrusions 332. The rib 333 acts to open the mounting portion 51 having a substantially C-shaped cross section in the horizontal direction, thereby providing a strong holding force to the mounting portion 51 mainly until the solder reflow process.

The rail 330 may be formed so as to become narrower from one end of the length direction toward the opposite side. For example, the rail 330 is formed with a narrow width in the range P in the figure as shown in FIG. Specifically, the top edge of the rail 330 is formed so that the left end is lower than the right end in FIG. 4A, and the rail 330 is vertically asymmetric. This allows the metal member 50 to slightly rotate with respect to the housing 20 when the metal member 50 is attached to the housing 20. This effect will be described below.

According to FIG. 2D, the fixing portion 61 of the metal member 50 is formed to be substantially flat. According to this configuration, when the metal member 50 is attached to the housing 20,
Due to problems in processing accuracy or assembly accuracy, metal members 5 on both ends
The arrangement of 0s is not strictly parallel, and a slight displacement of the fixed portion 61 occurs, and as a result, the fixed portion 6 of one metal member 50 is fixed.
The mechanical fixing strength when 1 is soldered to the pad (not shown) of the parent board may be lower than the designed value.

On the other hand, according to the configuration shown in FIG. 4, the fixing portion 61 of the metal member 50 is arranged at an appropriate position by slightly rotating the metal member 50, and the fixing strength of the fixing portion 61 by soldering is fixed. Can be stabilized. The configuration of the rail 330 can be combined with a metal member 250 described later.

As shown in FIG. 1C, the child board 100 is inserted into the card edge connector 10 from an oblique direction, and the tab 62 is inserted into the child board 100 when the child board 100 is inserted.
Guide the movement of the edge 101 of the to the housing 20.
The edge 101 of the child board 100 moves in the direction of arrow A, and the opposite edge 102 moves in the direction of B. Edge 101 of child board 100
Even after being placed in the housing 20, the child board 100 is rotated to a position substantially parallel to the parent board. As described above, since the curved surface 57 is formed on the top surface side of the intermediate portion 54 of the metal member 50, the rotated child board 100 is smoothly guided to an appropriate position. After the rotation, the recess 110 of the child board 100 is locked to the latch portion 52. In the process of locking, the elastic arm 72 bends outward as shown by the broken line in FIGS. 1 (a) and 2 (b). As shown in FIGS. 2A to 2C, the latch portion 52
Are arranged so as to intersect the front end 45 of the intermediate portion 54, so that they can come into contact with each other, whereby the elastic arm 72
Excessive bending of the is prevented. In addition, as is clear from FIGS. 2A to 2C, the elastic arm 72 is formed on the outer wall 70, and the inner wall 60 prevents the elastic arm 72 from excessively bending inward.

When releasing the locking of the sub-board 100, the operating portion 53 is operated outward, whereby the latch portion 52 can be moved outward and the locking can be released.
The child board 100 is held by the contact 30 so as to apply a rotation moment when the child board 100 is locked, and the opposite side edge 102 is lifted when the latch portion 52 is unlocked.

Although one embodiment has been described above, this embodiment can be further modified and changed. Modified embodiments are described below.

FIG. 3 shows a metal member 150 configured to further reduce the height of the card edge connector 10. Although the metal member 150 does not have a stop tab, when the metal member 150 is attached to the parent board,
The board surface of the parent board is configured to have a function of stopping the latch 52.

Still another metal member 250 is disclosed in FIG. The same reference numerals are given to configurations having the same functions as those of the metal member 50, and description thereof will be omitted. The main difference between the metal member 250 and the metal member 50 is the shape of the fixing portion 261 and the configuration of the intermediate portion 254.

First, the former will be described. Referring to FIG. 5E, the fixing portion 261 of the metal member 250 has the protrusion 2
62 and the first and second inclined portions 263 and 264, and has a substantially V shape so as to project downward. According to this configuration, the fixing portion 61 does not require a right-angled or acute-angled bending at the time of bending at the time of manufacturing, so that the processing is easy. Also,
Since a solder pool portion is formed between the inclined portions 263, 264 and the flat mating pad during soldering, the solder does not flow out from the pad, and other portions, for example, the elastic arm 72 and the like are not adversely affected by the solder. Does not affect Further, the fixing portion 61 provides a strong soldering strength capable of withstanding a twisting force acting when the elastic arm 72 is operated.

Next, the latter will be described. According to FIGS. 5A and 5B, the intermediate portion 254 of the metallic member 250 is shown.
Includes a rear portion 281 that defines an inner wall 260 and an outer wall 270 by bending a metal plate in a substantially U shape on the top side, and a front portion 282 that overlaps the inner wall 260 and the outer wall 270 extending from the rear portion 281. An elastic arm 72 having the same shape as that of the metal member 50 is formed on the outer wall 270. The inner wall 260 located at the front portion 282 is composed of a single plate. FIG. 5 (a)
Referring to, the top edge 266 of the inner wall 260 of the front portion 282 is placed at a position lower in the height direction than the curved surface 257 defined by the U-shaped bending described above so that the daughter board can be smoothly guided to the proper position. Further, according to FIG. 5 (b), the front end 245 of the inner wall 260 limiting the flexure of the elastic arm 72.
Is provided at a position slightly protruding outward. Thereby, the bending range of the elastic arm 72 can be made larger than that of the metal member 50. Since the middle portion 254 of the metal member 250 is bent in a U shape only at the position of the rear portion 281, it can be bent relatively easily.

[0024]

In the card edge connector of the present invention, a pair of metal members extending in the fitting direction are attached to both end walls of the elongated housing, and the metal members latch the child board. Since it is configured to include, the following effects are achieved.

(1) The card edge connector of the present invention is downsized as compared with the conventional product, and the mounting area on the printed board (parent board) is smaller. Therefore, the degree of freedom in circuit design of the printed circuit board increases.

(2) In the card edge connector of the present invention, since the guide means located on both sides of the housing are formed separately from the housing, the guide means are parallel due to the warpage of the board, which has been a problem in the conventional product. Solve the problem of not being placed.

(3) In the card edge connector of the present invention, the metal member which serves as the guide means can be attached to the housing after the contacts are inserted and arranged by the contact insertion jig. However, the contacts can be arranged in the vicinity of both ends where the contacts cannot be inserted due to being blocked by the guiding means, which contributes to downsizing.

[Brief description of drawings]

1A and 1B are views showing a card edge connector according to a preferred embodiment of the present invention, FIG. 1A is a front view, FIG. 1B is a bottom view, and FIG.

2A and 2B are views showing a metal member used in the card edge connector of FIG. 1, in which FIG. 2A is a front view, FIG. 2B is a plan view, FIG. 2C is a rear view rotated by 180 °, and FIG. ) Is a right side view.

FIG. 3 is a diagram showing a deformation mode of a metal member (a).
Is a front view, and (b) is a right side view.

4A and 4B are views showing a configuration of a rail that is a part of a housing, FIG. 4A is a partially cutaway side view, and FIG. 4B is a partial sectional view.

5A and 5B are views showing a metal member according to another preferred embodiment, FIG. 5A is a front view, FIG. 5B is a plan view, and FIG.
A rear view rotated by °, (d) is a right side view, and (e) is a cross-sectional view taken along the center line EE of (a) in which a mounting portion is omitted.

[Explanation of symbols]

 10 Card Edge Connector 20 Housing 30 Contact 50, 150, 250 Metal Member (Fixing Device) 51 Mounting Part 52 Latch Part 60, 260 Inner Wall 61, 261 Fixing Part 70, 270 Outer Wall 72 Elastic Arm

Claims (2)

[Claims] 1. A substantially U-shaped card edge connector having a pair of arms at both ends of an insulating housing body having a large number of contacts, which is attached to the surface of a mother board. A card made of metal fitted to both outer ends of the main body, wherein each arm integrally has a fixing portion to the mother board and a latch portion of a mother board connected to the mother board. Edge connector. 2. A fixing device for a card edge connector, wherein a daughter board is arranged substantially parallel to a mother board and interconnected to each other, wherein a fixing portion to the mother board, a latch portion of the daughter board, and the card edge connector are provided. A fixing device for a card edge connector, which has an integral structure made of metal and has a mounting portion fitted to an outer end of a housing.