JP2004241225A - Module socket - Google Patents

Abstract

A module socket having a length sufficient to secure a spring span of a ground contact (4) fixed to an insulating case (2) having a limited size is provided.
An insulating case having a limited size is provided, in which a retaining contact piece (4c) of a ground contact (4) is cantilevered on a support plate (4a) supported on an outer surface of a peripheral wall (5). In (2), a long spring span is secured, and plastic deformation is unlikely to occur when the module (110) is attached or detached.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a module socket that accommodates a module such as a board or an IC unit on which electronic components are mounted and electrically connects to a printed wiring board, and more particularly to a module socket that shields the periphery of the accommodated module.
[0002]
[Prior art]
A circuit component for executing a specific function is mounted together on a board, and a module in which integrated circuit elements of a specific function such as a storage unit are unitized is detachably attached to a printed wiring board according to the entire system. A module socket is known as a connecting component for this (prior art document information to be described is not found).
[0003]
FIGS. 8 and 9 show this conventional module socket 100. An insulating case 102 formed in a rectangular shape by forming a housing recess 101 opening upward, and a terminal in the housing recess 101. FIG. It is composed of a plurality of contacts 103 attached to the insulating case 102 with the contact portion 103a facing, and four ground contacts 104 also attached to the insulating case 102.
[0004]
The insulating case 102 is formed of a bottom plate 102a and a rectangular frame integrally formed from the periphery thereof. The inside surrounded by the rectangular frame is a housing recess 101 for housing a rectangular parallelepiped module 110.
[0005]
Each of the plurality of contacts 103 has one side of the strip-shaped metal piece supported upright along the inner side surface of the peripheral wall 105 constituting a rectangular frame, and the other free end bent at an acute angle is bent in an arc shape, and the module 110 The terminal contact portion 103a elastically contacts the terminal 111.
[0006]
The ground contact 104 is formed by bending one side of a strip-shaped metal piece into an inverted V-shape, forming an intermediate support plate portion 104a and a retaining contact piece 104b on the bent end side, and along the inner surface of the peripheral wall 105. The support plate portion 104a is fixed to the recessed mounting groove 105a, and in the fixed state, the retaining contact piece 104b is arranged to be inclined inward of the housing recess 101.
[0007]
The ground contacts 104 are fixed to the respective peripheral walls 105 that do not interfere with the contacts 103, so that four ground contacts 104 protrude into the accommodation recess 101.
[0008]
The base ends of the contact 103 and the ground contact 104 are exposed to the bottom side of the insulating case 102 through the bottom plate 102a, and are soldered to corresponding conductive patterns of a printed wiring board (not shown) on which the module socket 100 is mounted. Attached.
[0009]
In the module 110 housed in the module socket 100, the terminal 111 is exposed on the side surface, and the ground terminal 112 serving as the ground potential is exposed on a plane.
[0010]
When this module 110 is housed in the housing recess 101 of the module socket 100 as shown in FIG. 9, the tip of the retaining contact piece 104 b of the ground contact 104 contacts the ground terminal 112 exposed on the plane of the module 110, At the same time as the electrical connection, the module 110 is sandwiched between the retaining contact piece 104b and the bottom plate 102a at four positions, and is positioned in the accommodation recess 101. At the same time, the terminal contact portion 103a of the corresponding contact 103 elastically contacts the terminal 111 exposed on the side surface to be electrically connected, and the module 110 is electrically connected to the printed wiring board via the module socket 100.
[0011]
[Problems to be solved by the invention]
In this conventional module socket 100, when the module 110 is housed in the housing recess 101, it is necessary to elastically deform the retaining contact piece 104 b in the direction of the peripheral wall 105. Therefore, in the insulating case 102 having a limited size, a sufficient spring span (the distance from the fixed end to the position receiving the load) cannot be provided for the retaining contact piece 104b. . As a result, a relatively large force is required when attaching and detaching the module 110. If the module 110 is attached and detached in an unreasonable posture, one of the four ground contacts 104 easily exceeds the elastic limit, and may be plastically deformed. .
[0012]
The ground contact 104 is formed of a strip-shaped metal piece because of the above-mentioned elastic deformation, and is electrically connected to the ground terminal 112 of the module 110. However, since the ground contact 104 does not cover the periphery of the module 110, the ground contact 104 has an electromagnetic shielding function. There was no one.
[0013]
In order to cover and shield the entire periphery of the insulating case 102 with a metal plate connected to the ground pattern, it is necessary to bend the metal plate along the outer peripheral surface of the insulating case 102 and electrically connect the metal plate to the ground contact 104. In addition, the number of types of parts has increased, and the assembling process has been troublesome.
[0014]
The present invention has been made in view of the above-described problem, and has as its object to provide a module socket having a length sufficient to secure a spring span of a ground contact fixed to an insulating case having a limited size.
[0015]
It is another object of the present invention to provide a module socket that positions a module in a housing recess and shields the periphery of the module without increasing the types of components.
[0016]
[Means for Solving the Problems]
In view of the above-mentioned object, the module socket according to claim 1 is formed in a square shape surrounded by a peripheral wall, thereby being fixed to the insulating case having an accommodation recess that opens upward, and being fixed to the insulation case. A contact that contacts and electrically connects to the terminal of the accommodated module and a ground terminal that is fixed to the insulating case and that is exposed to the plane of the module housed in the housing recess and is electrically connected to the ground terminal and houses the module. A module socket with a ground contact positioned in the recess,
The ground contact is integrally connected to a support plate portion supported along the outer surface of the peripheral wall of the insulating case and an upper edge of the support plate portion. The free end of the ground contact is bent downwardly below the accommodation recess over the peripheral wall. And a free end of the retaining contact piece abuts on a ground terminal exposed on a plane of the module accommodated in the accommodating recess.
[0017]
The retaining contact piece of the ground contact is cantilevered by the support plate portion supported on the outer surface of the peripheral wall, so that a sufficiently long spring span is obtained, and the retaining contact piece is not easily plastically deformed when the module is attached or detached.
[0018]
The amount of deflection of the retaining contact piece is limited by the tip of the contact piece contacting the inner wall surface of the peripheral wall, and is less likely to be plastically deformed.
[0019]
In the module socket according to a second aspect, the support plate portion is a shield plate that covers an outer surface of the peripheral wall.
[0020]
Since the ground contact requiring elasticity and the shield plate covering the outer surface of the peripheral wall are integrated, there is no need to electrically connect these.
[0021]
In addition, since the outer surface of the peripheral wall is covered by the support plate portion, the strength of the insulating housing can be ensured even if the peripheral wall is thin, and the entire insulating housing can be reduced in size and weight.
[0022]
In the module socket according to the third aspect, the periphery of the insulating case is formed by a rectangular frame in which adjacent peripheral walls are orthogonal to each other, and four ground contacts fixed to the insulating case corresponding to each peripheral wall are respectively provided. A first engagement piece and a second engagement piece are formed by bending both sides along a vertical direction of a support plate portion formed in a contour shape covering an outer side surface of a corresponding peripheral wall, and the first engagement piece is formed. The piece and the second engaging piece are formed by bending such that the first engaging piece of one adjacent ground contact and the second engaging piece of the other ground contact overlap and engage with each other at the corners of the rectangular frame. The four grounding contacts cover the entirety along the outer surface of the rectangular frame.
[0023]
Since four ground contacts are used corresponding to each peripheral wall, there is no need to bend the shield plate along the outer shape of the rectangular frame.
[0024]
Further, one of the sets attached in parallel can be formed in the same shape, so that parts can be shared.
[0025]
Even if there are four ground contacts, the ground contacts overlap and engage with each other at the corners of the rectangular frame, so that the insulating housing is covered with the shield plate without any gap, and a high shielding effect can be obtained.
[0026]
The module socket according to the fourth aspect is characterized in that the rectangular frame is a square frame, and four ground contacts formed in the same shape cover the entirety along the outer surface of the square frame.
[0027]
Since the length of each peripheral wall and the width in the vertical direction are the same, four ground contacts can be formed in the same shape, and components can be shared.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a module socket 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7. 1 is an exploded perspective view of the module socket 1, FIGS. 2 and 3 are longitudinal sectional views of the module socket 1 before and after accommodating the module 110, and FIG. 4 is a plan view of the module socket 1. 5 is a front view of the same, FIG. 6 is a plan view of the insulating case 2, and FIGS. 7A, 7B, and 7C are a plan view, a front view, and a side view of the ground contact 3, respectively. is there. The module accommodated in the module socket 1 will be described using the module 110 described in the above-described conventional example.
[0029]
The module socket 1 shown in these figures includes an insulating case 2 for accommodating the module 110, a plurality of contacts 3, 3,... Which are integrally attached to the insulating case 2, and four ground contacts 4, 4,. It is composed of
[0030]
The insulating case 2 is formed in a square shape from an insulating synthetic resin, and a peripheral wall 5 is integrally erected on each peripheral edge of a square bottom plate 2a. By the square frame constituted by each of the peripheral walls 5 and the bottom plate 2a, an accommodation recess 6 which is open upward and accommodates the module 110 is formed inside the square frame.
[0031]
As shown in FIGS. 2 and 6, a contact receiving groove 7 for positioning and mounting the contacts 3 at a predetermined pitch is formed in the inner side surface of each peripheral wall 5 along the vertical direction. Through the bottom plate 2a so as to be led out to the bottom side of the insulating case 2.
[0032]
On both sides in the longitudinal direction of each peripheral wall 5, that is, near the corners of the square frame, fixed slits 8 along the longitudinal direction of the peripheral wall 5 are recessed downward from the top surface. A fixing piece 4b, which will be described later, of the ground contact 4 is press-fitted, and the ground contact 4 is positioned and fixed.
[0033]
Further, a guide groove 9 is formed in a portion of the peripheral wall 5 which does not interfere with the contact accommodating groove 7 and the fixing slit 8 so as to straddle the top surface.
[0034]
The contact 3 is formed by punching a conductive metal plate such as phosphor bronze into a strip shape and then bending it as shown in FIG. 2. The fixed plate portion 3 a that stands up and a right angle on one side of the fixed plate portion 3 a are formed. And a contact piece 3c bent in an inverted V-shape on the other side of the fixed plate portion 3a.
[0035]
On both sides of the fixed plate portion 3a, locking projections are protruded. By pressing the locking projections between the inner wall surfaces of the contact accommodating groove 7, the entire contact 3 is positioned and fixed to the insulating case 2. With the contact 3 fixed, the leg 3b is exposed along the bottom surface of the insulating case 2, and the contact piece 3c is inclined at the upper end of the fixing plate 3a toward the inside of the accommodation recess 6. It is supported.
[0036]
The ground contact 4 is formed by punching a conductive metal plate and then bending the periphery thereof as shown in FIGS. 1 and 7, and has a rectangular plate-like support plate portion having a contour covering the outer surface of the peripheral wall 5. 4a, a retaining contact piece 4c and a pair of fixing pieces 4b connected to the upper side of the support plate 4a, and a leg 4d connected to the lower side of the support plate 4a.
[0037]
One end (right side in FIG. 7A) of the support plate portion 4a opposed in the longitudinal direction is a first engagement piece 10 bent inward at a right angle along the vertical direction, and is provided on the other side. The end portion is a second engaging piece 11 similarly bent inward in a crank shape along the vertical direction.
[0038]
As shown in FIG. 4, the first engagement piece 10 and the second engagement piece 11 are connected to each other in a state where the adjacent ground contacts 4 and 4 intersect at right angles at the corners of the insulating case 2. The first engagement piece 10 of the contact 4 covers the crank-shaped second engagement piece 11 of the other ground contact 4 and is formed to engage with each other. As described above, by the engagement of the two, the insulating case 2 is covered with the ground contact 4 without any gap even at the corner.
[0039]
The retaining contact piece 4c is formed to be bent downward in a U-shape such that its free end is inclined downward inside and is cantilevered on the upper side of the support plate 4a.
[0040]
Further, the pair of fixing pieces 4b are continuously provided on both sides of the upper side of the support plate portion 4a, and are formed by being bent in a downward U-shape.
[0041]
The grounding contact 4 press-fits the downward end of the fixing piece 4 b into the fixing slit 8 from above, and positions and fixes it on the peripheral wall 5. When the ground contact 4 is fixed to the corresponding peripheral wall 5, the support plate portion 4 a is supported along the outer surface of the peripheral wall 5, and the downward U-shaped retaining contact piece 4 c is formed along the guide groove 9 on the top surface of the peripheral wall 5. And its free end protrudes downward from the accommodation recess 6.
[0042]
Further, a leg piece 4 d vertically provided on the lower side of the support plate portion 4 a projects along the peripheral wall 5 toward the bottom surface of the insulating case 2.
[0043]
Four of the ground contacts 4 formed in this manner correspond to the respective peripheral walls 5 and are attached to the insulating case 2. However, since the respective peripheral walls 5 forming the square frame have the same shape, the four The ground contacts 4 can all have the same shape.
[0044]
In addition, although the first engagement piece 10 and the second engagement piece 11 are engaged between the adjacent ground contacts 4 and 4, there is no overlapping portion in the vertical direction. Can be attached.
[0045]
The module socket 1 assembled by fixing all the contacts 3 and the ground contacts 4 to the insulating case 2 is surface-mounted on a printed wiring board (not shown), and the leg 3b of each contact 3 is formed by a corresponding pattern of the printed wiring board. Then, the leg 4d of each ground contact 4 is soldered to the ground pattern of the printed wiring board.
[0046]
The module 110 accommodated in the module socket 1 and electrically connected thereto is, for example, a plurality of circuit components 110a for performing a specific function mounted on a sub-board 110b, and these circuit components 110a are connected to a power supply or an electric signal. A terminal 111 for input / output is exposed on a side surface of the sub-substrate 110b, and a ground terminal 112 that becomes a ground potential is exposed on a plane of the sub-substrate 110b.
[0047]
When the module 110 is attached, as shown in FIGS. 2 and 3, the retaining contact piece 4c of each ground contact 4 is accommodated in the accommodation recess 6 while being bent in the direction of the peripheral wall 5 from above. After being accommodated, the retaining contact piece 4c is restored by its own elasticity and comes into contact with the flat surface of the module 110 so as not to come out.
[0048]
When the module 110 is housed in the housing recess 6, the terminal 111 exposed on the side surface elastically contacts the contact piece 3 c of the contact 3 protruding into the housing recess 6, and the terminal 111 is exposed to the ground terminal 112. The ends of the retaining contact pieces 4c of the ground contact 4 are in contact with each other, and are electrically connected.
[0049]
Since the periphery of the insulating case 2 is covered by the supporting plate portion 4a of the ground contact 4 in which the adjacent first engaging piece 10 and second engaging piece 11 are overlapped, the leg 4d of the ground contact 4 is grounded on the printed wiring board. By soldering to the pattern, the periphery of the module 110 is shielded without any gap.
[0050]
The present invention is not limited to the above-described embodiment. For example, the insulating case 2 does not need to be a square frame, and can be formed in various shapes. However, if the adjacent peripheral walls 5 are rectangular frames that are orthogonal to each other, the pair of peripheral walls 5 that are parallel to each other have the same length, so that the same ground contact 4 can be used corresponding to each peripheral wall 5.
[0051]
The shape of the first engagement piece 10 and the second engagement piece 11 is not limited to the above-described embodiment as long as the first engagement piece 10 and the second engagement piece 11 overlap and engage with each other between the adjacent ground contacts 4, 4.
[0052]
【The invention's effect】
As described above, according to the present invention, since the retaining contact piece of the ground contact is cantilevered from the outer surface of the insulating case having a limited size, a sufficiently long spring span (from the fixed end to the position receiving the load). Is obtained, and plastic deformation is difficult.
[0053]
Further, since the spring span is long, the module can be stored or taken out while deforming the retaining contact piece with a light operating force.
[0054]
According to the second aspect of the present invention, in addition, since the outer surface of the peripheral wall is covered with the support plate, the strength of the insulating housing can be ensured even when the peripheral wall is thin, and the entire insulating housing can be reduced in size and weight. .
[0055]
According to the third aspect of the present invention, in addition to the above, the grounding contact divided for each peripheral wall is simply attached without bending the shield plate along the outer shape of the rectangular frame. Can be shielded.
[0056]
Further, one of the sets attached in parallel can be formed in the same shape, so that parts can be shared.
[0057]
According to the invention of claim 4, in addition, since the length of each peripheral wall and the width in the vertical direction are the same, four ground contacts can be formed in the same shape, and components can be shared.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a module socket 1 according to the present invention.
FIG. 2 is a longitudinal sectional view of the module socket 1 showing a state before the module 110 is accommodated.
FIG. 3 is a longitudinal sectional view of the module socket 1 accommodating the module 110.
FIG. 4 is a plan view of the module socket 1;
FIG. 5 is a front view of the module socket 1;
FIG. 6 is a plan view of the insulating case 2.
FIG. 7A is a plan view of a ground contact 3;
(B) is a front view,
(C) is a side view.
FIG. 8 is a longitudinal sectional view of a module 110 and a conventional module socket 100.
9 is a longitudinal sectional view of a conventional module socket 100 accommodating a module 110. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Module socket 2 Insulating case 3 Contact 4 Ground contact 4a Support plate part 4c Retaining contact piece 5 Peripheral wall 6 Housing recess 10 First engaging piece 11 Second engaging piece 110 Module 111 Terminal 112 Grounding terminal

Claims (4)

An insulating case (2) in which a housing recess (6) opening upward is formed by forming a square shape surrounded by the peripheral wall (5);
A contact (3) fixed to the insulating case (2) and in contact with and electrically connected to the terminal (111) of the module (110) housed in the housing recess (6);
The ground terminal (112) fixed to the insulating case (2) and exposed to the plane of the module (110) housed in the housing recess (6) is brought into contact with the ground terminal (112), and is electrically connected to the module (110). A) a grounding contact (4) for positioning the module in the receiving recess (6).
The ground contact (4) is integrally connected to a support plate (4a) supported along the outer surface of the peripheral wall (5) of the insulating case (2) and an upper edge of the support plate (4a), A free end having a retaining contact piece (4c) bent over the peripheral wall (5) downwardly of the accommodation recess (6);
A module socket characterized in that a free end of a retaining contact piece (4c) abuts on a ground terminal (112) exposed on a plane of a module (110) housed in a housing recess (6). The module socket according to claim 1, wherein the support plate (4a) is a shield plate that covers an outer surface of the peripheral wall (5). The periphery of the insulating case (2) is formed by a rectangular frame in which adjacent peripheral walls (5) are orthogonal to each other,
Support plate portions each having a contoured shape covering four outer surfaces of the corresponding peripheral wall (5), each of the four ground contacts (4) fixed to the insulating case (2) corresponding to each peripheral wall (5). (4a) has a first engagement piece (10) and a second engagement piece (11) formed by bending both sides along the vertical direction,
The first engagement piece (10) and the second engagement piece (11) are connected to the first engagement piece (10) of one adjacent ground contact (4) and the second engagement piece of the other ground contact (4). The joint piece (11) is bent and formed into a shape that overlaps and engages with each other at the corners of the rectangular frame,
The module socket according to claim 2, characterized in that four ground contacts (4) cover the whole along the outer surface of the rectangular frame. A rectangular frame is a square frame,
4. The module socket according to claim 3, wherein four ground contacts (4) formed in the same shape cover the entirety along the outer surface of the square frame.

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