JP3306483B2 - Electronic component substrate support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support for an electronic component substrate, for example, a printed circuit board, and more particularly to a guide structure for inserting and removing a printed circuit board in the printed circuit board.

[0002]

2. Description of the Related Art A printed wiring board unit (hereinafter, referred to as a printed board) is widely used as a component of a computer or the like. This printed board is used by being mounted on a support such as a shelf. The printed circuit board needs to be able to be inserted and removed from the shelf for maintenance or the like. For this reason, it is usual that the shelf is fixed and the printed circuit board is inserted and removed along the guide rail.
In order to easily and surely insert and remove the printed circuit board from the shelf, various types of support structures have been devised. FIG. 3 shows an example of the structure disclosed in Japanese Utility Model Laid-Open No. 1-161385.

In FIG. 3, reference numeral 1 denotes a printed circuit board;
a is a shelf upper surface, 2b is a shelf bottom surface, 3 is a left side plate of the shelf, 4 is a right side plate of the shelf, 11 is a guide rail, and 12 is a pair of ribs forming the guide rail 11. In the drawings, members having the same or similar functions are denoted by common numbers. In the printed circuit board 1, a roller is provided at a contact portion with the guide rail 11 (not shown), so that friction between the printed circuit board 1 and the guide rail 11 is reduced to facilitate the taking in and out of the printed circuit board.

[0004] A structure of a support as shown in FIG. 4 is also known. In this figure, 8 is a guide rail,
9 is an opening formed in the upper surface and the bottom surface of the shelf. FIG. 5 is an arrow view of the support.

In the structure shown in FIG. 3, one guide rail 11 is provided for each printed circuit board 1. In this structure, openings are provided on the bottom and top surfaces of the shelf. The guide rail is divided into three. The printed board 1 is guided to a predetermined position by a guide rail 8. In addition, since air is circulated through openings formed in the upper surface and the lower surface of the shelf, the printed circuit board can be cooled by forced air cooling or natural air cooling.

[0006]

However, in the support having the above structure, there is a problem in cooling efficiency of the printed circuit board. For example, in the support shown in FIG. 3, the flow of air is poor, and the heat radiated from the printed circuit board 1 is accumulated in the shelf, and the circuit on the printed circuit board 1 may run out of heat. In the structure shown in FIG. 4, air is circulated to some extent by providing openings on the bottom and top surfaces of the shelf, thereby dissipating heat from the printed circuit board. However, in this structure, since the guide rail occupies a large portion on the bottom surface or the top surface of the shelf, it is difficult to increase the opening area of the cooling opening. Therefore, the inflow resistance is increased in both the natural air cooling and the forced air cooling, and the cooling efficiency is not so high.

Further, if the guide portion is simply reduced to increase the opening area of the opening, the printed circuit board may not slide in parallel with the guide rails at the time of insertion and removal of the printed circuit board and may fall off. I can't. Further, since the rigidity of the guide rail itself is reduced, even the function of the shelf may not be satisfied due to distortion and distortion.

Further, in the above-described insertion / extraction guide structure of the printed circuit board 1, since the contact area between the guide rail and the printed circuit board wiring unit is large, frictional resistance is increased, and smooth insertion / extraction cannot be performed. There is also a problem that powder is generated. SUMMARY OF THE INVENTION An object of the present invention is to provide a printed circuit board support that can easily and reliably guide a printed circuit board with high cooling efficiency in view of the above background.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a plurality of electronic component substrates, for example, a plurality of printed circuit boards can be arranged in parallel with each other in a detachable manner. In the printed circuit board support having guide rails formed thereon for guiding to the arrangement position, an opening is provided in the bottom surface so that air flowing through the opening cools the printed board when the printed circuit board is mounted. In the opening, a rod is provided for guiding the printed circuit board when the printed circuit board passes through the opening, and the longitudinal axis of the rod is substantially perpendicular to the insertion / removal direction of the printed circuit board. It is characterized by having such a configuration.

In the above configuration, it is preferable that the rod-shaped member is configured to be rotatable about its longitudinal axis by contacting the printed circuit board when the printed circuit board is inserted and removed. In addition, the shape is preferably, for example, a cylindrical rod-like shape that can support a printed circuit board and does not hinder the flow of air. When the opening is large, the rod is
In order to smoothly guide the printed circuit boards, it is preferable to arrange a plurality of printed circuit boards at intervals so as not to fit into the openings.

[0011]

By providing an opening on the bottom surface of the support of the printed circuit board, the printed circuit board is cooled by air flowing through the opening when the printed circuit board is mounted. At this time, in order to secure the strength of the support and to smoothly guide the printed circuit board, it is usually necessary to reduce the opening to some extent. Therefore, in the present invention, since the strength of the support is improved by providing the rod-shaped body in the opening, the opening can be made large. Further, the influence on the air circulation is small. In addition, by setting the longitudinal axis of the rod to be substantially perpendicular to the insertion / removal direction of the printed board, the contact area between the printed board and the rod is reduced, so that the friction between the two is reduced, and the insertion / extraction of the printed board is performed smoothly. It can be carried out. Further, by configuring the rod-shaped body to be rotatable about its longitudinal axis, it is possible to more smoothly insert and remove the printed circuit board.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a printed circuit board support (shelf) according to an embodiment of the present invention, and FIG. In these figures, 5a is the upper surface of the shelf, 5b
Denotes a bottom surface of the shelf, 6 denotes a rod (rod-like body), and 7 denotes a heating element such as a circuit. An opening 10 is provided at the center of the shelf bottom 5b.
Is provided. A rod 6 is provided at the center of the opening 10, and its longitudinal axis is perpendicular to the insertion direction of the printed circuit board 1.

In this structure, the printed circuit board 1 is guided to a predetermined position by a guide rail 8 on the shelf bottom surface 5b. When the printed board 1 passes through the opening, the printed board 1 passes over the rod 6.

If the opening 10 is large, when inserting or removing the printed circuit board 1, the rear end of the printed circuit board 1 is inserted into the opening 10 due to its own weight, and is sandwiched between the upper surface and the bottom surface of the shelf. Although there is a possibility that insertion and removal may not be possible, by providing the rod 6 as described above, the opening 10
Even if the size is large, there is no possibility that the printed circuit board 1 gets stuck in the opening 10.

The longitudinal axis of the rod 6 is perpendicular to the insertion direction of the printed circuit board 1, so that the contact area between the printed circuit board 1 and the rod 6 is small and the friction is small. Therefore, insertion and removal of the printed circuit board 1 are also easy. Furthermore, since the rod 6 has a cylindrical shape, when the printed circuit board wiring unit 1 passes through the opening 10, the printed circuit board 1 can be guided in the normal insertion direction even if the rear lower end portion of the printed circuit board 1 is dropped off. The rod 6 may be rotatable around its longitudinal axis. In this case, the rod 6 functions as a "roller", and the insertion and removal of the printed circuit board 1 is further facilitated.

Further, since the area occupied by the opening 10 is relatively large as compared with the conventional case, the cooling air can efficiently blow through the shelf in the vertical direction, usually from the bottom to the top. Cooling efficiency can be increased. Since the rod 6 has a thin cylindrical shape as described above, the loss when the cooling air passes can be almost ignored.

[0017] Normally, larger take the rigidity of the opening ratio of the opening 10 of the shelf bottom 5b is lowered, by which arranged rod 6 in the present embodiment, distortion or distortion suppression <br/> Erare Also, the rigidity of the entire shelf is improved.

In this embodiment, only one rod 6 is provided in the opening 10. However, the opening 10 is large, and if only one rod 6 is provided, the rod 6 and the opening 1 are provided.
If there is a possibility that the printed circuit board 1 will fit between the end portions of the printed circuit board 0, a plurality of rods 6 may be arranged in parallel at a predetermined interval. By doing so, the printed circuit board 1 can be further improved.
There is also an advantage that the insertion and removal of the device becomes smooth.

Further, by making the opening 10 larger, the contact area between the shelf bottom surface 5b and the printed circuit board 1 is reduced, and the frictional resistance is reduced. Therefore, the shelf bottom surface 5b
The generation of abrasion powder generated by friction between the substrate and the printed circuit board 1 is also suppressed. Although the printed circuit board has been described above, it goes without saying that the present embodiment can be similarly applied to other electronic component boards similar to the printed circuit board.

[0020]

As described above, according to the present invention,
Since the electronic component substrate is supported by the rod-shaped body during insertion / removal, even if the opening is enlarged, the electronic component substrate is not stuck in the opening, and the rod-shaped body is a reinforcing material for the bottom surface of the support of the electronic component substrate. Therefore, there is an effect that the strength of the bottom surface of the support is increased and distortion and distortion of the bottom surface are suppressed.

Further, since the contact area between the electronic component substrate and the rod-shaped body is small and the friction is reduced, there is an effect that the insertion / extraction guide of the electronic component substrate becomes smooth. In particular, when the rod-shaped body is cylindrical, the rigidity is improved as compared with the conventional sheet metal guide rail, and the abrasion powder generated by friction between the electronic component substrate wiring unit and the guide rail is suppressed, and the reliability is improved. The performance is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a support according to one embodiment of the present invention.

FIG. 2 is an arrow view of a support according to one embodiment of the present invention.

FIG. 3 is an explanatory view of a support according to a conventional example.

FIG. 4 is an explanatory view of a support according to a conventional example.

FIG. 5 is an arrow view of a support according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 3 Left side plate 4 Right side plate 5a Shelf top surface 5b Shelf bottom surface 6 Rod 7 Heating element 8 Guide rail 10 Opening

Claims (2)

(57) [Claims] 1. An electronic component substrate, comprising: a plurality of electronic component substrates which can be arranged in a parallel and detachable manner with each other; and a guide rail formed on a bottom surface for guiding each electronic component substrate to a predetermined arrangement position. In the support, an opening is provided in the bottom surface so that air flowing through the opening cools the electronic component substrate when the electronic component substrate is mounted, and the electronic component substrate is provided in the opening. the rod-like member to guide the electronic component substrate when passing through the opening is provided, the longitudinal axis of the rod-shaped member has been configured such that the insertion direction substantially perpendicular of the electronic component substrate, the support of the electronic component substrate body. 2. The electronic component substrate support according to claim 1, wherein the rod-shaped member is configured to be rotatable about its longitudinal axis by contacting the electronic component substrate when the electronic component substrate is inserted and removed. Tei Ru, the support of the electronic component substrate.