JP2550610Y2 - Mounting structure of guide rail for supporting sub-board - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in unit to be mounted on an electronic device such as a communication device and an OA device. More specifically, the present invention supports a sub-board for improving the mounting density of electronic components and the like on a printed circuit board. The present invention relates to a guide rail mounting structure.

[0002]

2. Description of the Related Art There are many electronic devices such as communication devices and OA devices in which a plug-in unit (plug-in package) containing a printed circuit board is detachably attached to the device. The plug-in unit is a hybrid IC or A
A large number of printed circuit boards, such as SICs, on which various electronic components are mounted are provided. However, as demands for high-density mounting increase from the user side, sub-mounts for mounting various components to respond to this request are provided. 2. Description of the Related Art A board is detachably mounted on a main printed board. The sub-board can be easily removed without removing the main board itself from the plug-in unit. In order to change the functions and specifications of the device,
Only the sub-board is removed to check, adjust, and replace the minimum necessary parts. 3 (a), 3 (b), 3 (c)
FIG. 2 is an explanatory view showing a conventional mounting structure for connecting a sub-board to a main printed board, and a plurality of metal chassis plates 32 having one edge fixed to a main board 31 are spaced apart from each other by a predetermined distance. Are fixed in parallel. Each guide rail 33 is a substantially H-shaped resin mold having guide grooves extending in the longitudinal direction on its upper and lower surfaces, and slidably supports the upper and lower edges of the sub-substrate 34 between the opposed guide grooves. It is. The upper and lower edges of the chassis plate 32 are bent as shown to extend steplessly with the upper and lower edges of the main substrate 31 so that the upper and lower edges of the main substrate 1 and the chassis plate 32 are plugged in. In the guide groove 35a.

As a method for fixing the guide rail 33 to the chassis plate 32, as shown in FIGS. 3 (a) and 3 (b), a protrusion 36 is provided on the rear surface of the guide rail 33.
Into the hole 37 formed on the chassis plate side,
6 is crimped or the screw 38 as shown in FIG.
In general, a method of fixing is used. However, the conventional guide rail mounting method described above requires assembling jigs and tools due to caulking and screwing, which requires not only poor workability but also a large number of man-hours. Was desired. In addition,
2-60198, Japanese Utility Model Publication No. 56-99897
According to the Japanese Utility Model Publication No. 61-153390,
A stop piece is provided at one end of the guide rail and its elastic force is used
Technology to fix the guide rail to the chassis
As shown, these are all the lengths of the guide rail.
Because it is only locked and supported at both ends in the direction ,
The central part of the trail is free from the chassis
is there. Therefore, based on the guide rail fixed to the chassis,
When inserting the plate, do not press-fit parallel to the guide rail
Then, the guide rails are deformed and become difficult to insert. Also,
The free center of the resin guide rail is aged
It is said that the change makes it difficult to insert and remove the board.
There is a defect.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has been made in consideration of the above. A guide rail for supporting a sub-substrate that enables one-touch operation of attaching a guide rail to a chassis plate without using special tools. It is intended to provide a mounting structure. It is another object of the present invention to prevent various troubles caused by the floating of the central portion by fixing not only both ends in the longitudinal direction of the guide rail but also the central portion (intermediate portion) to the chassis.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, a guide rail mounting structure according to the present invention is a structure in which a guide rail for slidably mounting a sub-board is mounted on a chassis plate, and the guide rail is provided on a bottom surface thereof. Several
Plurality and having the projections and a plurality of recesses has a longitudinal end portion to elastically deformable elastic locking piece into and out direction, the sheet <br/> Yashi plate loosely fitting the respective projection the hole and, a plurality of first locking protrusion for retaining this by fitted into the respective <br/> recess, a second Kakaritome突for locking the elastic latching pieces has a single, elastic wherein both the opening edge of each recess抜落Chi prevention protrusion is protruded, by pressing a rear side of the elastic latching pieces in the second locking protrusion frontward Before when deformed
Serial first engaging projection piece is made possible drop in the <br/> recess to avoid preventing projection Chi said抜落, the first positioned in the recess when the resilient locking pieces has returned to its original shape locking protrusion is locked by the抜落Chi prevention projection, the plurality of
At least one of the projection and the recess is provided with the guide rail.
It is characterized in that it is arranged at an intermediate position in the longitudinal direction of the bottom surface of the console .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings. 1 (a) and 1 (b) are a perspective view and a sectional view showing a main part of a sub-board mounting structure according to an embodiment of the present invention. The chassis plate 2 is fixed to an end, and a chassis 7 of a plug-in package (FIG. 1B)
(See Reference). Each main board 1 is detachably connected to a connector on a device main body (not shown) by each connector 3 located at a rear edge thereof, and a connector for connecting the sub-board 5 is provided at a front edge of the main board 1. 4 is provided. The upper surface of the chassis plate 2 is a space for detachably mounting the sub-board 5.

The chassis plate 2 is a metal plate whose upper and lower edges are bent as shown in FIG.
The guided portion 6 is slidably fitted in a guide groove 8 arranged on the upper and lower surfaces of the housing 7 of the plug-in package, and is configured to be movable in the housing 7. The guided portion 6 can be smoothly slid into the guide groove 8 of the plug-in package by connecting the upper and lower edges of the main board 1 in a stepless manner.
On the surface of the chassis plate 2, guide rails 10 for slidably supporting the sub-board 5 are arranged in parallel along the mounting direction of the sub-board, as in the above-described conventional example. A characteristic feature is that a one-touch mounting is enabled by providing a guide rail locking mechanism as shown in FIGS. That is, a recess 1 having a protrusion 11 on the bottom surface of the guide rail 10 along its longitudinal direction and a drop-off preventing protrusion 12a at one end in the longitudinal direction of the opening.
2 are alternately arranged, and elastic locking pieces 13 that can be elastically deformed inward and outward (inward and forward) from one end of the guide rail 10 are provided . On the other hand, a hole 1 for receiving the projection 11 is provided on the chassis plate 2 side to which the guide rail 10 is to be fixed.
5 and a first locking projection 16 that fits into the recess 12 and locks the same, and a second locking projection 17 that locks the locking piece 13 is provided.

The length of the hole 15 is set to be longer than that of the projection 11 so as to support the projection 11 movably in a predetermined range in the longitudinal direction of the guide rail. Each of the locking protrusions 16 and 17 forms a U-shaped cut in a part of the chassis plate 2 and then bends a portion located inside the cut line in an inverted L-shape toward the guide rail 10 mounting surface side. They are facing each other. When the guide rail 10 is pushed in the mounting direction indicated by the arrow, the drop-out prevention projection 12a of the recess 12
When the guide rail is slid in the direction opposite to the mounting direction after the guide rail is received inside, the drop-out preventing projection 12a engages with the first locking projection 16 as shown in FIG. The locking piece 13 extends once to the back side in the mounting direction and then hangs downward, and has an inverted hook 13 a at the tip.

By inserting the reverse hook 13a, it is locked as shown in the figure. Of the plurality of protrusions 11 and recesses 12
Either one is in the longitudinal middle of the guide rail bottom surface
It is also located at the position (center), corresponding to these
The holes 15 and the first locking projections 16 are also provided on the corresponding chassis plate.
Is formed. Therefore, the guide
Guide rail when the rail is fixed to the chassis plate 2
Eliminates lifting at the center, ensuring a stable guide
be able to. When the guide rail 10 as described above is fixed to the chassis plate 2, first, the reverse hook 13 a (rear side surface) of the locking piece 13 located at the back end of the guide rail is locked to the second locking projection 17. I do. In this state, the projection 11 is
However, the first locking projection 16 interferes with the dropout prevention projection 12a and cannot fit into the recess 12. Subsequently, the locking piece 13 is moved to the second locking projection 17.
When the entire guide rail is pressed to the rear side in the mounting direction so as to press the guide rail, the locking piece 13 is elastically deformed to the near side (outside) and the entire guide rail moves in the rear direction. Reaches a position where it can drop into the opening between the inner wall of the recess 12 and the dropout prevention protrusion 12a. At this time, when the guide rail 10 is pressed against the surface of the chassis plate 2, the first locking projection 16 falls into the recess 12. Subsequently, when the pressing force on the guide rail is released, the entire guide rail slightly returns to the right in the drawing due to the restoring force of the locking piece 13, so that the distal end of the first locking protrusion 16 is pulled out as shown in FIG. It enters into the fall prevention protrusion 12a and engages with it. This series of operations can be performed with one touch by hand without using any special tool, and the mounting workability of the guide rail can be greatly improved.

[0010]

As described above, according to the present invention, the operation of attaching the guide rail to the chassis plate can be performed with one touch without using tools, and the workability can be greatly improved. Also, among the plurality of protrusions and recesses,
At least one of each is not only the end but also the guide rail bottom
It is also arranged at the middle position (central part) in the longitudinal direction of the surface,
The corresponding holes and the first locking projections
It is formed on a board. Therefore, the above procedure
When the guide rail is fixed to the chassis plate 2, the guide rail
Eliminates lifting at the center of the tool and secures a stable guide
can do. In other words, when inserting the printed circuit board,
Difficult to insert due to deformation of the guide rail
Difficult to pull out, difficult to insert and remove due to deformation over time, etc.
Problems can be eliminated.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory diagrams of a configuration of an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the embodiment of FIG. 1;

FIGS. 3A, 3B and 3C are explanatory diagrams of a configuration of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main board, 2 ... Chassis board, 3 ... Connector, 4 ... Connector, 5 ... Sub board, 6 ...
Guided part, 7: Plug-in package housing,
8 ... guide groove, 10 ... guide rail, 11 ...
· Projection, 12 · · · recess, 12a · · · Fall-out prevention projection, 13 · · · elastic locking piece, 13a · · · reverse hook, 15 ·
..Hole, 16 ... first locking projection, 17 ... second locking projection,

Claims (1)

(57) [Scope of request for utility model registration] 1. A structure in which a guide rail for slidably mounting a sub-board is attached to a chassis plate, wherein the guide rail has a plurality of protrusions and a plurality of
And has a number of recesses, having a longitudinal end portion inward and outward to <br/> elastically deformable resilient locking pieces, the chassis plate before
Engaging a plurality of holes, a plurality of first locking protrusion for retaining this by fitting within said each recess, said bullet <br/> of locking pieces loosely fitting the serial each protrusion a second engagement protrusion of one of stopping, the
Both the opening edge of each recess抜落Chi prevention protrusion is projected, the when undergo elastic deformation to the front side is pressed against the inner side surface of the elastic latching pieces in the second locking protrusion first engaging projection piece is made possible drop in the recess to avoid the抜落Chi preventing protrusions, the first locking protrusion located in said recess when the resilient locking pieces has returned to its original shape is the locked by抜落Chi prevention projection, at least each one of said plurality of projections and recesses is pre
The guide rail is located in the middle of the bottom of the guide rail in the longitudinal direction.
Mounting structure of the sub-substrate supporting guide rails, characterized in that that.