JPH0541588A - Printed board mounting structure - Google Patents

Abstract

PURPOSE:To eliminate a chilled air from a position of a printed board drawn when the board is drawn at the time of hot-line maintenance or hot-line additional mounting in a printed board mounting structure particularly mounted in an electronic apparatus and cooling the board having a heat generating component such as an LSI, etc., with chilled air. CONSTITUTION:The printed board mounting structure comprises a printed board 13 mounting heat generating components and inserted into a back panel 1, a shelf 2 inserted with the board through a guide rail 4 and having an opening 3 for feeding chilled air, an air cover 11 surrounding the board 13 and having an opening 11a for feeding the air in a predetermined direction, and shielding plates 6, 7 in which its tension is always applied to the opening side to open or close the opening 3 provided at the shelf 2 according to insertion or removal of the board 13, and the plates 6, 7 are provided at the end of the shelf 2 at the side of the back panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board mounting structure, and more particularly to a printed circuit board mounting structure for mounting a printed circuit board mounted on an electronic device and having a heat generating component such as an LSI with cold air.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, an electronic device has a back panel 100 on its rear surface.
Printed circuit board 1 having heat-generating components such as LSI for 00
02 is connected to the connector. This printed board 102
Back panel 10 when connecting the
Shelf 101 is installed in front of 0, and this shelf 1
Guide rail 103 for guiding printed board 102 to 01
Is provided.

On the other hand, the printed board 1 is attached to the shelf 101.
An opening 105 serving as a passage for cold air for cooling 02 is provided.
5 are located on both sides.

Therefore, the opening 10 of the lower shelf 101
The cold air supplied from 5 is the opening 1 of the upper shelf 101.
05, the heat of heat generating components such as LSI on the printed board 102 located between the shelves is taken and discharged to the outside, and such cooling is performed.

A front plate 104 serves to prevent the cold air from leaking and to act as a shield against noise and the like.

[0006]

In recent years, when performing maintenance or extension of a printed board mounted on an electronic device, active maintenance or extension is performed. That is, since the work is performed while the electronic device is in operation, when one printed board is pulled out, cool air leaks from the pulled-out position, and it becomes impossible to cool the other mounted printed boards. ..

Therefore, an object of the present invention is to prevent cold air from leaking from the position of the pulled-out printed board when the printed board is pulled out during active maintenance or active addition.

[0008]

SUMMARY OF THE INVENTION The above-mentioned object is to mount a heat-generating component on the printed board 1 to be mounted on the back panel 1.
3 and a shelf 2 having the printed board 13 inserted through a guide rail 4 and having an opening 3 through which the cold air flows.
And an air cover 11 which surrounds the printed board 13 and has an opening 11a through which the cool air flows in a predetermined direction.
And a shield plate 6 and 7 which is constantly applied to the opening side and which opens and closes the opening 3 provided in the shelf 2 in accordance with the insertion and removal of the printed board 13. The shield plates 6 and 7 are This is achieved by a printed circuit board mounting structure, which is provided at an end of the shelf 2 on the back panel side.

[0009]

That is, in the present invention, when a certain printed board connected to the back panel by the connector is pulled out, the stress that regulates the shielding plate, to which the tension is constantly applied to the opening side of the shelf, disappears. Based on this, the opening is closed.

Further, when the printer plate is mounted, since there is a stress that regulates the shield plate by the air cover, the opening is secured based on the stress in the direction opposite to the tension.

[0011]

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

FIG. 2 is a diagram showing the operation of the first embodiment. FIG. 3 is a view showing the air cover of the first embodiment.
FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram showing the operation of the second embodiment. FIG. 6 is a diagram showing the operation of the second embodiment. 1 to 6, the same reference numerals denote the same objects.

First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a pair of shelves 2 positioned in the vertical direction and a connector 5 for making a connector connection with a printed board to be described later are provided on the front surface of a back panel 1, and a printed board mounted on the shelf 2 is provided between them. A guide rail 4 is provided to guide the insertion and removal of
The guide rail 4 can be easily inserted and removed by sliding the edge of the printed board.

On the other hand, on the shelf 2 with the guide rail 4 as a boundary, an opening 3 serving as a passage for cold air for cooling a heat-generating component such as an LSI mounted on a printed board is provided, and corresponds to the opening 3. A spring hinge 10 is provided at the end portion on the back panel side of the position, and the shield plate 6 is provided with the spring hinge 10 as an axis.
7, 8 and 9 are provided.

The shield plates 6, 7, 8 and 9 are spring hinges 10.
The opening 3 provided in the shelf 2 is normally closed by the action of the. Further, as can be seen from the drawings, the openings 3 located in the left, right, upper, and lower parts of the guide rail 4 are opened and closed by different shielding plates, so that the four shielding plates 6, 7, 8, 9 are provided, and in order to avoid a collision when each of them is moved in the closed state, at least the shield plates 6 in a vertical relation
The shield plate 7 and the shield plate 8 and the shield plate 9 are different in length, for example, from the shield plate 6 and the shield plate 8 as compared with the shield plate 7 and the shield plate 9.

In order to facilitate understanding, FIG. 1 shows a state in which printed boards mounted between the shelves are removed. As shown in FIG. 3, the printed board 13 used in the first embodiment is surrounded from the front and back sides of the printed board 13 by an air cover 11 made of a metal having a U-shaped cross-section, and the enclosed printed board. A heat-generating component 14 such as an LSI to be cooled is mounted on 13, and an edge portion of the printed board protrudes from the end of the air cover 11 for a predetermined length, and the protruding portion slides on the guide rail described above. It becomes the part to do.

The operation of the first embodiment will be described with reference to FIG. 2. FIG. 2A shows a state in which the printed board 13 is mounted on the shelf 2, and the front surface of the back panel 1 (in the drawing, FIG. Printed board 1 between shelves 2 located on the left side
3 is inserted and mounted, the printed board 13
The shield plates 6 and 7 are pressed by the end surface 11b (right side in the figure) of the air cover 11 that covers the shield plates 6 and 7 due to the stress acting on the shield plates 6 and 7 in the direction opposite to the tension of the spring hinge 10. Spring hinge 1 to panel 1 side
It rotates about 0, so the shelf 2 and the air cover 1
The openings 3 and 11a of 1 and 1 are aligned with each other to form a passage of cold air, and the heat-generating component 14 such as an LSI mounted on the printed board 13 is cooled.

FIG. 1B shows a state where the printed board 13 is pulled out from the shelf 2, and when the printed board 13 is pulled out from the shelf 2,
The opening 3 of the shelf 2 is in a state where the printed board 13 is completely pulled out from the shelf 2 in the L direction by the tension T which constantly acts on the opening 3 side of the shelf 2 of the spring hinge 10.
Is not blocked by the shield plates 6 and 7, and therefore does not adversely affect the cooling of other printed boards in operation.

Although not shown, the shield plates 8 and 9 are operated in the same manner as the shield plates 6 and 7 are operated. Next, from the state where the opening 3 of the shelf 2 is closed by the shield plates 6 and 7, the printed board 13
The state in which the shielding plates 6 and 7 rotate with the insertion of the will be described.

When the shield plates 6 and 7 are in a state of completely closing the opening 3, when the printed board 13 is inserted in the R direction, the end surface 1 of the air cover 11 surrounding the printed board 13 is closed.
1b is a bent portion 6 provided at the tips of the shielding plates 6 and 7.
a, 7a.

When the printed board 13 is continuously inserted while the collision state is maintained, the shield plates 6 and 7 move in the anti-tension direction with the spring hinge 10 as the axis, as shown by the dotted line in FIG. Rotate. The end surface 11 of the air cover 11 when pressing the shield plates 6 and 7 in the dotted line state
b is at the position of the two-dotted broken line.

After that, when the printed board 13 is completely inserted, the shielding plates 6 and 7 are located between the printed board 13 and the back panel 1 as shown in FIG. As described above, the opening 3 of the shelf 2 and the air cover 1
1 and the opening 11a coincide with each other to form a passage for cold air,
A heat-generating component 14 such as an LSI mounted on the printed board 13.
Cooling is performed.

In the first embodiment, as shown in FIG. 1, the areas of the shielding plates 6 and 7 are only about half of the area of the opening 3 provided in the shelf 2, but the remaining half is occupied. Since it is used as a cooling passage for the adjacent air cover 11, leakage of cold air does not occur.

Next, a second embodiment of the present invention will be described with reference to FIGS. Incidentally, in the second embodiment,
Descriptions of parts having the same configurations as those of the first embodiment will be omitted, and those given the same reference numerals in the first embodiment respectively represent the same object.

As shown in FIG. 4, in the present embodiment,
On the shelf 2 with the printed board 13 (guide rail 4) as a boundary, an opening 3 serving as a passage of cold air for cooling heat-generating components such as LSI mounted on the printed board 13 is provided, and corresponds to the opening 3. The spring hinges 10 are provided on the air covers 19 and 20 surrounding the printed board 13 at the positions, and the shield plates 15, 16, 17, and 18 are provided around the spring hinges 10.

The shield plates 15, 16, 17, and 18 are designed to close the opening 3 provided in the shelf 2 under normal conditions by the action of the spring hinge 10. However, in the state of FIG. 4, since the printed board 13 is mounted on the shelf 2, the shielding plates (combination of 15 and 18 and 16 and 17) are shielded from each other when the printed board 13 is inserted. Since the plate is pressed toward the air cover (for example, the shield plate 18 is pressed against the air cover 19 by the tension of the shield plate 15), the opening 3 of the shelf 2
Since the openings 11a of the air covers 19 and 20 can be aligned with each other, heat-generating components such as LSI mounted on the printed board 13 can be cooled.

FIG. 6 is a view showing an air cover of the second embodiment, which is a portion (in the drawing) corresponding to the opening 3 of the shelf 2 of a U-shaped metal body which surrounds the printed board 13 and has a U-shaped cross section. Shield plates 17 and 18 that shield the opening 3 in the notch 11c)
Install. This attachment is fastened to the air cover 19 by a screw or the like so that the spring hinge 10 serves as an axis, and the tension of the spring hinge 10 normally causes an outward direction of the spring hinge 10 (no load is applied). It is urged to.

Next, the operation of the second embodiment will be described with reference to FIGS. 4 and 5. As described above, the state shown in FIG. 4 shows a state in which the printed board 13 is mounted on the shelf 2. Therefore, when the printed board 13 is mounted on the shelf 2, the shield plates 15, 16, 17, 18 provided on the respective air covers 19, 20 face each other and the tension of the adjacent shield plate (directly the spring hinge 10). Of the air covers 19 and 20, and the shielding plates 15, 16, 17, and 18 can be neutralized in the cutout portions 11c of the air covers 19 and 20 located at the boundaries between the air covers 19 and 20, respectively. Therefore, the printed board 13 is attached to the shelf 2.
Along with the mounting of the
That can be opened and is mounted on the printed board 13.
It is possible to cool heat-generating components such as.

On the other hand, the state shown in FIG. 5 shows the state where the printed board 13 is removed from the shelf 2.
The description will be made assuming that the printed board 13 on the right side in the drawing is removed from the shelf 2. When the printed board 13 on the right side is removed, the shield plate 17 provided on the air cover 19 surrounding the printed board 13 on the left side, Since there is no force to press 18, the shield plates 15 and 16 provided on the left air cover 20 close the opening 3 of the shelf 2 by the tension T'in the direction of the arrow from the broken line portion in the drawing around the spring hinge 10. It will be.

In the second embodiment, one opening 3
Since the two air covers 19 and 20 are positioned with their respective half areas, when one printed board 13 is removed, the shielding plate 17 provided on the air cover 19 surrounding the other printed board 13 is removed. With the use of the shielding plates 17, 18 provided on the air cover 19 surrounding the other printed board 13 while ensuring the passage of the cool air for cooling the heat-generating components such as the LSI mounted on the other printed board 13 Since it is possible to block the passage of the cold air that originally cools the heat-generating component such as the LSI mounted on one printed board 13, there is no adverse effect on the cooling of the other printed board 13 in operation.

[0032]

As described above, according to the present invention, it is possible to automatically open or close the opening provided in the shelf that serves as a passage for cold air when the printed board mounted on the shelf is inserted or removed. Therefore, in the operating state, there is no obstruction to the cooling of other printed boards that are in operation due to the leakage of cool air when an arbitrary printed board is removed from the shelf, and therefore the cooling capacity is improved.

[Brief description of drawings]

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

2A and 2B are diagrams showing the operation of the first embodiment, in which FIG. 2A shows a state in which a printed board is mounted, and FIG. 2B shows a state in which the printed board is removed.

FIG. 3 is a diagram showing an air cover of the first embodiment.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram showing the operation of the second embodiment.

FIG. 6 is a diagram showing an air cover of a second embodiment.

FIG. 7 is a diagram showing a conventional example.

[Explanation of symbols]

1 back panel, 2 shelves, 3
Opening, 4 guide rails, 6, 7,
8, 9, shield plate, 10 spring hinge, 13 printed board,

Claims (3)

[Claims] 1. A printed board (13) on which a heat-generating component is mounted and which is attached to a back panel (1), the printed board (13) is inserted through a guide rail (4), and the cold air is passed through. A shelf (2) having an opening (3) through which the air flows, an air cover (11) surrounding the printed board (13) and having an opening (11a) through which the cold air flows in a predetermined direction, and a constant opening The tension is applied to the side, and the opening (3) provided in the shelf (2) is connected to the printed board (1).
3) has a shield plate (6, 7) that opens and closes according to the insertion and removal of the shelf, and the axis accompanying the movement of the shield plate (6, 7) is
A printed circuit board mounting structure, characterized in that the printed circuit board mounting structure is provided at an end portion on the back panel side of. 2. The shield plate (6, 7) having a bent portion (6a, 7a) at its tip, and a spring hinge (10) for constantly applying tension to the shield plate (6, 7) on the opening side. When the air cover (11) is inserted, its tip (11
When b) collides with the bent portions (6a, 7a) of the shield plates (6, 7), the shield plates (6, 7) are moved in the anti-tension direction about the back panel side end as an axis. (3) is released, and when the air cover (11) is pulled out, the shielding plate (6, 6)
According to the tension applied to 7), the opening (3)
The printed board mounting structure according to claim 1, wherein the printed circuit board mounting structure is closed. 3. A printed board (13) on which a heat-generating component is mounted and which is attached to a back panel (1), the printed board (13) is inserted through a guide rail (4), and the cold air is passed through. And a shelf (2) having an opening (3) through which the cold air flows, and an opening (11a) surrounding the printed board (13) and allowing the cold air to flow in a predetermined direction. The opening (3) provided in (2) is opened / closed according to the insertion / extraction of the printed board (13), and the shield plates (17, 18) are always tensioned on the opening side.
An air cover (19) having a printed circuit board mounting structure.