JPH0644144Y2 - Printed circuit board mounting mechanism in electronic devices - Google Patents

Description

[Detailed Description of the Invention] [Outline] Regarding a mechanism for storing a printed circuit board on which electronic circuit components are mounted in a shelf of an electronic / communication device, in particular, a specially sized printed circuit board out of the standard can be efficiently stored. Compact guide rails make it possible to effectively use the space inside the shelf and use standard size connectors without changing the arrangement of the special printed circuit board mounting mechanism. For this purpose, a plurality of guide grooves are provided on the upper and lower walls of the shelf at a predetermined pitch by sheet metal working, and a plurality of standard size printed circuit boards are stored side by side with the upper and lower edges engaged with the guide grooves. In a shelf of electronic equipment configured to be made of sheet metal along one side of a special printed circuit board smaller than the standard size Guide rails are attached, and when the special printed circuit board is housed in the shelf, the guide on the special printed circuit board is attached to a standard size printed circuit board adjacent to the special printed circuit board or a mounting plate of substantially the same size. A guide rail made of sheet metal and paired with the rail is attached, and the guide rails are engaged with each other to stably hold the special printed circuit board.

[Industrial application field]

The present invention relates to a mechanism for housing a printed circuit board on which electronic circuit parts are mounted in a shelf of an electronic / communication device,
In particular, it relates to a mechanism that can efficiently store a special-sized printed circuit board that is out of the standard.

[Conventional technology]

Generally, an electronic device is configured by accommodating a large number of printed circuit boards mounted with circuit components such as ICs and LSIs in parallel in a shelf, and connecting these to a backboard also mounted in the shelf via a connector. ing. The mounting pitch and external dimensions of the printed circuit boards and connectors have been standardized, and the upper and lower edges of the printed circuit boards are fitted from the front of the shelf into the guide grooves that are provided in advance on the upper and lower wall surfaces of the shelf by sheet metal processing. The terminal provided at the rear end of the printed circuit board is naturally fitted into the pin of the connector by pushing it into the inner part of the board, thereby improving the efficiency of the assembling work. Therefore, when a printed circuit board of a size other than the standard size printed circuit board is mounted in the same shelf, for example, as shown in FIG. According to the height of the printed circuit board 3 (about half the height of the standard product 5), it is attached so as to project from the side wall 10 of the shelf 2, whereby the printed circuit board 3 is supported.

[Problems to be solved by the device]

When such an intermediate rail is provided, it is necessary to make the thickness t considerably thick in order to secure a predetermined strength. For this reason, the size of the connector 6 arranged in the upper and lower two stages at a predetermined pitch in the back of the shelf and the size of the newly mounted printed circuit board 3 do not match, and the connector also has a nonstandard small size. The need arises. Particularly, in view of the situation that the number of terminals on the printed circuit board is increasing due to the recent increase in the density of electronic devices, it is a fatal drawback to reduce the size of the connector.

The present invention uses a compact guide rail,
It is an object of the present invention to provide a mounting mechanism for a special-sized printed circuit board that can effectively use the space in the shelf and can use a standard-sized connector without changing the arrangement.

[Means for Solving the Problems]

For this purpose, a plurality of guide grooves are provided on the upper and lower walls of the shelf at a predetermined pitch by sheet metal working, and a plurality of standard-sized printed circuit boards are accommodated in parallel while the upper and lower edges are engaged with the guide grooves. In the shelf of the electronic device configured as described above, a guide rail made of sheet metal is attached to one surface of the special printed circuit board smaller than the standard size along the length direction, and when the special printed circuit board is stored in the shelf, A guide rail made of sheet metal that is paired with the guide rail on the special printed circuit board is attached to a standard size printed circuit board adjacent to the special printed circuit board or a mounting plate of substantially the same size as the special printed circuit board. And a special printed circuit board is held stably by the mounting mechanism of the printed circuit board.

[Action]

To store these printed circuit boards in the shelf, first insert a standard size printed circuit board equipped with guide rails or a plate of substantially the same size in advance into the guide groove of the shelf, and then special The guide rail mounted on the plate substrate may be inserted along the guide rail. In this case, one of the upper and lower edges of the special printed board may be engaged with the guide groove of the shelf.

Hereinafter, the present invention will be described in more detail with reference to the preferred embodiments shown in the drawings.

〔Example〕

FIG. 1 shows a first embodiment of the present invention. This example is intended to mount the special printed circuit boards in the upper and lower two stages in the space where one standard printed circuit board should be inserted.

Guide grooves 4 are provided in parallel on the upper and lower walls of the shelf 2 at a predetermined pitch by sheet metal working. The standard size printed circuit board 5 is pushed vertically to the paper surface of the figure with the upper and lower edges thereof engaged with the guide grooves 4, and the connectors 6 are arranged on the backboard in two steps at a predetermined pitch.
Is configured to be connected to.

According to the present invention, the special printed circuit board 3 mounted on the upper side
Along the lower edge of one side of the sheet metal male guide rail 7
Is fixed. On the other hand, a similar guide rail 7'is fixed to the upper side of the special printed circuit board 3'mounted on the lower side.

Female guide rails 8 and 8'corresponding to the guide rails 7 and 7'are vertically arranged at the center of the standard printed circuit board 5 housed in the shelf adjacent to these special printed circuit boards 3 and 3 '. It is fixed to the tier.

In order to mount these printed circuit boards 3, 3 ', 5 in the shelf 2, first, the standard printed circuit board 5 is inserted into the guide groove 4 at a predetermined position, and the guide rails 8, 8'are attached to the special printed circuit board 3'. Face the side where 3'is to be mounted. Next, the upper guide groove 4'adjacent to the upper edge of the special printed circuit board 3
, The male guide rail 7 is inserted with the tip of the male guide rail 7 engaged with the upper female guide rail 8, and the lower edge of the special printed circuit board 3'is engaged with the lower guide groove 4 '. Let
The male guide rail 7'is inserted with its tip engaged with the lower female guide rail 8 '. Both guide rails 7,8
FIG. 2 shows the engaged state with the.

As a result, the special printed circuit boards 3 and 3'are securely and stably mounted in the shelf by the engagement of both guide rails. Also, since the guide rails 7, 7 ', 8, 8'are attached to the printed circuit board within the range of their length, it is possible to avoid interference with the connector 6 arranged on the backboard.

FIG. 3 shows a second embodiment in which the first embodiment is applied to both sides of a standard printed board 5 and a pair of upper and lower special printed boards 3 and 3'are attached to both sides thereof.

FIG. 4 shows that the female guide rails 8 and 8'are fixed to another mounting plate 9 instead of being provided on the standard printed circuit board 5,
A third embodiment will be shown in which the plate 9 is mounted in the shelf by an appropriate means. In this example, one guide rail 8 serves as both upper and lower guide rails.

FIG. 5 shows a fourth embodiment constructed so that only the female guide plates 8, 8'provided on the mounting plate 9 can stably hold the special printed circuit boards 3, 3 '.

FIG. 6 shows a fifth embodiment in which the guide rail 8 is fixed by using the side wall 10 of the shelf 2 instead of the standard printed circuit board 5 and the mounting plate 9.

[Effect of device]

As described above in detail, according to the present invention, the guide rail is fixed on the special printed circuit board, and the corresponding guide rail is fixed by using the standard printed circuit board adjacent to this or the mounting plate of the same size. Since the special printed circuit board is mounted in the shelf by fixing it and engaging both guide rails, interference between the connector arranged on the backboard and the guide rails is avoided, and the standard size that has been conventionally arranged. The connector can be used as it is.

Further, since these guide rails can be made thin by sheet metal working, it is possible to effectively use the space in the shelf.

[Brief description of drawings]

FIG. 1 is a front view of a shelf showing a first embodiment of the present invention, FIG. 2 is an enlarged perspective view showing engagement of both guide rails, and FIG. 3 shows a second embodiment of the present invention. Front view of the shelf, FIG. 4 is a front view of the shelf showing a third embodiment of the present invention, FIG. 5 is a front view of the shelf showing the fourth embodiment of the present invention, and FIG. 6 is the present invention. FIG. 7 is a front view of a shelf showing a fifth embodiment of the present invention, and FIG. 7 is a front view of a shelf to which a conventional intermediate rail is attached. 1 ... Intermediate rail, 2 ... Shelf, 3 ... Special printed circuit board, 4 ... Guide groove, 5 ... Standard printed circuit board, 6 ... Connector, 7 ... Male guide rail, 8 ... Female guide Rails, 9 ... Mounting plate, 10 ... Side wall of shelf.

Claims (1)

[Scope of utility model registration request] 1. A plurality of standard grooves having a plurality of guide grooves (4) formed on the upper and lower walls of a shelf (2) at a predetermined pitch by sheet metal working, and having upper and lower edges engaged with the guide grooves (4). In a shelf (2) of an electronic device configured to accommodate the printed circuit boards (5) in parallel, a special printed circuit board (3) smaller than the standard size is made of sheet metal along the length direction. Attach the guide rails (7,7 '),
When the special printed circuit board (3) is housed in the shelf (2), a standard size printed circuit board (5) adjacent to the special printed circuit board (3) or a mounting plate (9) of substantially the same size. ) Is attached with a guide rail (7, 7 ') made of sheet metal and paired with the guide rail (7, 7') on the special printed circuit board (3), and these guide rails (7, 8) are attached to each other. A printed circuit board mounting mechanism, characterized in that the special printed circuit board (3) is stably held by being engaged.