JPH0717194Y2 - Card edge printed board mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Outline] Regarding the mounting structure of a card edge printed board which is widely used for the construction of various electronic devices, the mounting and removal to / from a mother board is made easy, and the connection is surely made against vibration and the like. With the aim of providing a new mounting structure for a card edge printed circuit board that can be fixed, a motherboard on which a plurality of connectors each having a recess on the side surface are mounted in parallel, and a plurality of edge contacts to be connected to the connector are attached to one edge. Along with arranging, a protrusion for positioning is provided on the other end surface facing each other, a printed board on which a plurality of electronic components are mounted, and a U-shaped thin plate that covers the printed board in a row coupled with the connector, The means for fastening to the mother board is provided at the tip of one of the opposite side walls, and the other side wall is provided with the concave portion of the connector. A locking portion to be engaged is formed, and a plurality of positioning holes for positioning the protruding portions of the printed board by arranging the protruding portions of the printed board are arranged at respective positions of the ceiling surface facing the front end surface of the printed board. And the fixing member.

[Industrial application field]

The present invention relates to a mounting structure for a card edge printed board that is widely used in the construction of various electronic devices.

Recently, electronic components such as highly integrated semiconductor elements and capacitors are recently mounted on a motherboard mounted on an electronic device such as a large-scale computer through a printed board connector (hereinafter simply referred to as a connector) mounted in a matrix. A plurality of small-sized card edge printed boards (hereinafter abbreviated as printed boards) mounted in parallel are vertically installed so that the motherboard can be easily upgraded.

Therefore, there is a need for a new card edge printed board mounting structure that can easily attach and detach the printed board at the time of version upgrade, and can securely connect and fix the connector to the connector against vibration of the device. .

[Conventional technology]

As shown in FIG. 5 (a), the mounting structure of the card edge printed board which has been widely used in the past is used for the card edge printed board on the main surface of the mother board 1 having a circuit pattern (not shown) formed on the surface and the inner layer. Connectors 3 are mounted in a matrix. Further, an electronic component 2-2 such as a semiconductor element and a capacitor is mounted on a circuit board 2-1 in which a plurality of edge contacts 2-1a are arranged at one edge, and the electronic component 2-2 and the edge contact 2- A printed board 2 is formed by connecting 1a with a connection pattern (not shown).

Then, the edge contact 2-1a portion of the printed board 2 is inserted into the connector 3 of the mother board 1 as shown in FIG.
As shown in FIG. 2, the claws 4a of the pair of fixing metal fittings 4 connected to the connector 3 are locked to the notch-shaped engaging portions 2-1b formed on both end surfaces of the circuit board 2-1. It is configured to fix the printed board 2 inserted in.

[Problems to be solved by the device]

A problem with the conventional mounting structure of the card edge printed board described above is that the circuit board as shown in FIG.
When the printed board 2 is fixed by locking the claws 4a of the fixing metal fitting 4 connected to the connector 3 to the notch-shaped engaging portions 2-1b formed on both end surfaces of 2-1. As shown in FIG. 6, the shape of the front end locking portion is such that the opposing inner wall dimension "A" is formed in a U-shape having a larger dimension than the board thickness "B" of the circuit board 2-1. Therefore, due to the vibration of the equipment, the upper part of the printed board 2 is fixed by vibrating the difference between the “A” dimension and the “B” dimension, that is, the inner wall of the tip locking portion and the gap between the circuit and the circuit board 2-1. The claw 4a of the metal fitting 4 is disengaged from the engaging portion 2-1b of the circuit board 2-1 and the printed board 2 is detached from the connector 3, or the edge contact 2-1a of the printed board 2 and the connector 3 are connected.
There is a problem that the reliability of the connection is lowered due to the occurrence of a momentary disconnection with the contact provided inside.

In view of the above problems, the present invention provides a new card edge printed board mounting structure that can be easily attached to and removed from a mother board and can be securely connected and fixed against vibration and the like. To aim.

[Means for Solving the Problems]

According to the present invention, as shown in FIG. 1, a mother board 1 in which connectors 3 each having a side surface recessed portion 3a are mounted in parallel, and a plurality of edge contacts 12-1a connected to the connector 3 as shown in FIG. A printed board 12 arranged on the edge and provided with positioning protrusions 12-1b on the other end face opposite to each other and mounted with a plurality of electronic components 2-2, and a row connected to the connector 3 as shown in FIG. A thin plate is bent in a U-shape so as to cover the printed board 12, and a means 14-3 for fastening to the mother board 1 is provided at the tip of one of the opposing side walls as shown in FIG. Of the printed board 12 having a locking portion 14-2 that engages with the concave portion 3a of the connector 3 is formed at the other side wall tip, and the locking side 14-2 is formed at the other opposite side wall tip and is joined to the connector 3 on the ceiling surface. At each position facing the tip surface, the printed board And a fixing member 14 in which positioning holes 14-1 for fitting and positioning the protruding portions 12-1b of 12 are arranged.

[Action]

In the present invention, as shown in FIG. 1, an edge contact is inserted to cover a row of printed boards 12 connected to the connector 3 of the mother board 1 with a fixing member 14, and as shown in FIG. 14-1 to the protruding portion 12 of the circuit board 12-1
-1b Tightening means 14 fitted in the side wall and arranged at the tip of one side wall 14-
While being fastened to the motherboard 1 by means of 3, the locking portion 14-2 formed at the tip of one side wall is locked in the side surface recess 3a of the connector 3 mounted on the motherboard 1.

As a result, the protrusions 12-1b of the circuit board 12-1 are fitted into the positioning holes 14-1 arranged in the fixing member 14 to position the leading edge of the printed board 12 coupled with the connector 3, and Since the notched upper end surface of the printed board 12 is pressed by the ceiling plate of the fixing member 14, the printed board 12 can be easily attached and detached, and can be securely connected and fixed against vibration and the like. Become.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing a mounting structure of a card edge printed board according to an embodiment of the present invention, FIG. 2 is a perspective view showing a fixing member of this embodiment, and FIG. 3 is a card edge printed board of this embodiment. And FIG. 4 is a sectional view for explaining the operation.

In the figure, the same members as those in FIG. 5 are denoted by the same symbols, but the other 12 are card edge type printed boards to be attached to the respective connectors mounted on the motherboard, 1
Reference numeral 4 is a fixing member for fixing the printed board mounted on the connector.

As shown in FIG. 3, the printed board 12 has a plurality of edge contacts on one end edge of an insulating board having a conductor pattern printed on the surface.
12-1a are arranged in a line in the same manner as the conventional one at a position corresponding to a contact of a connector (not shown). In addition, a notch is formed at the center and both ends of the other end opposite to the edge contact 12-1a to form two positioning protrusions 12-1b.
To form a circuit board 12-1 on both sides,
-1 is a card edge printed board in which a plurality of semiconductors and electronic components 2-2 such as resistors are mounted respectively.

As shown in FIG. 1, the fixing member 14 has a size that can be covered by a row of printed boards 12 in which the edge contacts 12-1a side is inserted and connected to the connector 3 mounted in a matrix on the main surface of the mother board 1. Then, the thin plate is bent into a U-shape, and as shown in FIG. 2, the opposite side wall tips of the U-shape are bent further outward, and the bent side is fixed to the side plate 15 fixed to the mother board 1. The fastening hole 14-3 is drilled.

An engaging portion protruding inward so that it can be engaged with the side surface recessed portion 3a formed on the side surface of the connector 3 at the tip of the other side wall.
14-2 are formed on both edges in the width direction.

Then, the protruding portion 12 provided on the circuit board 12-1 of the printed board 12 so that the leading edge of the printed board 12 coupled with the connector 3 can be fitted and positioned on the surface serving as the ceiling connecting the both end walls. Slit part 1 with width and length that 1b can be inserted
Positioning holes 14-1 composed of 4-1a and a wide portion 14-1b for facilitating insertion of the protruding portion 12-1b are arranged in a row at positions facing the front end surface of the printed board 12.

As shown in FIG. 1, the mounting structure of the card edge printed board using the above-mentioned members is such that the edge of the printed board 12 is attached to each connector 3 having concave portions 3a on the side surface mounted in a matrix on the main surface of the motherboard 1. Contact 12-1
By inserting the a side, a plurality of printed boards 12 are laid vertically in parallel and in a plurality of rows.

A fixing member 14 is attached to each row of the arranged printed boards 12 so as to cover the upper and side surfaces thereof, and each positioning is arranged on the ceiling surface of the fixing member 14 as shown in FIG. The slits 14-1a of the holes 14-1 are fitted into the protrusions 12-1b provided on the circuit board 12-1 of the printed board 12, respectively.

The fastening member 14-2 is fastened to the side plate 15 fixed to the mother board 1 by a fastening hole 14-3 provided at the tip of one side wall of the fixing member 14 and the locking portion 14-2 formed at the tip of the other side wall.
Is fixed to the side surface concave portion 3a of the connector 3 mounted on the mother board 1 to fix the fixing member 14.

As a result, the connector 3 is inserted into the slit portion 14-1a of the fixing member 14.
Since the protruding portion 12-1b of the printed board 12 coupled to the printed board 12 is positioned and the notched upper end surface of the printed board 12 is pressed by the fixing member 14, the printed board 12 can be easily attached and detached, and the vibration can be reduced. Etc. can be securely connected and fixed.

Although the present invention has been described above based on the illustrated embodiment, the present invention is not limited to the embodiment described above, and for example, the fixing member and the side plate may be integrated and fastened directly to the motherboard.

[Effect of device]

As is apparent from the above description, according to the present invention, there is an advantage that the printed board can be easily attached and detached and can be surely connected and fixed against vibration and the like with an extremely simple structure. Thus, it is possible to provide a mounting structure for a card edge printed board, which can be expected to achieve remarkable economic and reliability improvement effects.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounting structure of a card edge printed board according to an embodiment of the present invention, FIG. 2 is a perspective view showing a fixing member of the present embodiment, and FIG. 3 is a card edge printed board of the present embodiment. FIG. 4 is a sectional view for explaining the operation, FIG. 5 is a perspective view showing a mounting structure of a conventional card edge printed board, and FIG. 6 is a view showing a problem. In the figure, 1 is a motherboard, 2-2 is an electronic component, 3 is a connector, 3a
Is a side surface recess, 12 is a printed board, 12-1 is a circuit board, 12-1a
Is an edge contact, 12-1b is a protruding portion, 14 is a fixing member, 1
Reference numeral 4-1 is a positioning hole, 14-1a is a slit portion, 14-1b is a wide portion, 14-2 is a locking portion, 14-3 is a fastening hole, and 15 is a side plate.

Claims (1)

[Scope of utility model registration request] 1. A motherboard (1) in which a plurality of connectors (3) each having a recess (3a) on its side surface are mounted in parallel.
And a plurality of edge contacts (12-1a) connected to the connector (3) are arranged at one end edge, and a positioning protrusion (12-1b) is provided on the other end surface facing each other, thereby providing a plurality of electronic components. The printed board (12) on which (2-2) is mounted and the printed board (1) in a row connected to the connector (3).
A thin plate formed in a U shape covering 2) is provided with a means (14-3) for fastening to the mother board (1) at one side wall tip facing the other side wall, and the connector (3) is attached to the other side wall tip. ) Is formed with a locking portion (14-2) that engages with the concave portion (3a), and the printed board (12) is provided at each position on the ceiling surface that faces the front end surface of the printed board (12). ) Of the protrusion (12
-1b) to fit and position multiple positioning holes (1
A mounting structure for a card edge printed circuit board, which is composed of a fixing member (14) in which 4-1) are arranged.