JPH05167274A - Guide structure of printed board unit - Google Patents

Abstract

PURPOSE:To eliminate looseness between a guide rail and a printed board unit by a method wherein a guide part prescribed in thickness is mounted on the printed board unit, and the printed board unit is guided by the guide rail provided with a groove as large in width as the thickness of the guide part. CONSTITUTION:A guide part 2, which is composed of a tongue 2a and a side 2b that is prescribed in thickness and bent at the tongue 2a to be in parallel with the lengthwise direction of the a printed board unit 1, is fixed to both the edges 1a of the printed board unit 1 by the tongue 2a and screws 3. The printed board unit 1 with the guide part 2 is supported by a guide rail 5 and made to slide freely on it. A groove 5a set nearly as large in width as the prescribed thickness of the guide part 2 is provided to the guide rail 5, so that no looseness is produced between the guide rail 5 and the guide part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed board unit guide structure, and more particularly to a printed board unit guide structure for guiding and inserting the printed board unit when connecting to a back panel of a housing through a jack. It is about.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a printed board unit 40 slides on guide rails 41 provided corresponding to both edges of the printed board unit 40 so that the printed board unit 40 can be moved. A guide is provided along with the insertion / removal, the jack 42 provided on the back surface of the printed board unit 40 is engaged with the terminals of the back panel 44, and the back panel 44 is joined to the printed board unit 40. Particularly in the conventional example, as shown in FIG. 5, the guide rail 41 guides the wall thickness of the edge portion of the printed board unit 40 to insert and remove the printed board unit.

The thickness of the printed board unit 40 varies depending on the number of laminated layers (printed board unit shown by solid lines and dotted lines in FIG. 5), and the maximum layer thickness is set so that any layer thickness can be accommodated. Groove 4 on the guide rail
1a is determined.

[0004]

However, in the past, when the thickness of the printed board unit was thin, there was play in the groove of the guide rail, and this play causes the printed board unit to move left and right in advance. Taking this into consideration (especially when the mounting height of the component mounted on the printed board unit is high, it is necessary to consider the moving amount), the positions of the adjacent guide rails are shown to some extent (shown by α in FIG. 6). ) It is not preferable for high-density mounting because it is arranged apart.

Therefore, an object of the present invention is to increase the mounting density of the guide rails that guide the printed board unit when inserting and removing it.

[0006]

SUMMARY OF THE INVENTION The above object is to provide an edge portion 1a of the printed board unit 1 in a printed board unit guide structure for guiding the printed board unit 1 when the printed board unit 1 is inserted into and removed from the housing. Mounted on the printed circuit board unit 1 and having a guide portion 2b having a predetermined wall thickness and a groove 5a corresponding to the predetermined wall thickness of the guide component 2, And a guide rail 5 attached to the housing while supporting the guide component 2 slidably, and the guide structure of the printed board unit.

[0007]

That is, in the present invention, a guide component having a predetermined wall thickness is attached to the printed board unit,
Since the guide rail guides the printed board unit by the guide rail having the groove width equivalent to the wall thickness of the guide component, there is no backlash between the guide rail and the printed board unit. Therefore, the adjacent guide rails can be arranged as close as possible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a sectional view of an embodiment of the present invention. FIG. 3 is an enlarged view of part A. In addition, the same reference numerals throughout FIG. 1 to FIG. 3 indicate the same objects.

As shown in FIG. 1, a tongue portion 2 is provided on both edges 1a of a printed board unit 1 on which components not shown are mounted.
The guide component 2 is fastened by a screw 3 and is bent from the tongue portion 2a thereof, and the side portion 2b having a predetermined thickness is formed in parallel with the longitudinal direction of the printed board unit 1. ..

A jack 4 connected to a back panel (not shown) is provided on the right side of the printed board unit 1 in FIG.
Is attached. When the cross section of FIG. 1 is shown in FIG. 2, the tip ends of the guide components 2 mounted above and below the printed board unit 1 are supported by guide rails 5 mounted on a housing (not shown). The printed board unit 1 including the guide component 2 is supported by the guide rails 5 and freely slid on the guide rails 5.

An enlarged view of the portion A in FIG. 2 is shown in FIG. 3, and the relationship between the guide component 2 and the guide rail 5 is a width approximately equal to a predetermined thickness of the guide component 2. Since the groove 5a set to 1 is formed in the guide rail 5, there is no excessive play between the guide rail 5 and the guide component 2. It should be noted that in FIG. 3, there is play between the guide rail 5 and the guide parts, but this play is a design play, and it is said that this play is smaller than that shown in the problem of the present invention. There is no end.

That is, in this embodiment, the guide component 2 having a predetermined wall pressure is slid on the guide rail 5 having a groove corresponding to the wall thickness, whereby the guide rail and the guide member are guided. There is no play between the component 2 (printed board unit 1) and the combination thereof. What is necessary is to make one set of a guide component and a guide rail set to a predetermined size. Since it is possible to deal with a printed board unit having a board thickness, the cost is also desirable.

Further, in the present embodiment, the guide part 2 has been described as having a curved portion. However, this curved portion is not absolutely necessary, and the curved portion is excluded if necessary. It may be a straight guide part.

[0015]

As described above, according to the present invention, even if the thickness (plate thickness) of the printed board unit changes, the printed board unit is guided severely without being affected by backlash. Therefore, it is possible to make the structure very suitable for high-density mounting.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a sectional view of an embodiment of the present invention.

FIG. 3 is an enlarged view of part A.

FIG. 4 is a diagram showing a conventional example.

FIG. 5 is a cross-sectional view taken along the line A-A ′.

FIG. 6 is a diagram showing a problem.

[Explanation of symbols]

 1 printed board unit, 2 guide parts, 2a tongue, 2b sides, 3 screws, 4 jacks, 5 guide rails,

Claims (1)

[Claims] 1. A printed circuit board unit guide structure for guiding the printed circuit board unit (1) when the printed circuit board unit (1) is inserted into or removed from the housing, wherein an edge portion (1a) of the printed circuit board unit (1) is provided. Which is attached to the printed circuit board unit (1) and has a guide portion (2b) having a predetermined wall thickness and a predetermined wall thickness of the guide member (2). Groove (5
A guide structure for a printed board unit, comprising: a), a guide rail (5) attached to the housing and slidably supporting the guide component (2).