JP2000332439A - Shock dispersing rib and box body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain stiffness of a cabinet 1, without breaking internal electronic components, etc., by a rib provided inside the cabinet 1 for housing the electronic components and a printed wiring board 2. SOLUTION: There is provided a rib 4, on the inner wall face of a cabinet 1, which has a prescribed length, and in which the height from the inner wall face of the cabinet 1 towards a substrate 2 is highest at a position counter to a boss 3 for supporting the substrate 2, and as the rib 4 separates from the position counter to the boss 3, it is formed continuously low. When a shock is given to an X position relevant to the position where the height is formed highest, the shock is fully supported by the rib 4 and the boss 3. Furthermore, an impact force when the shock is given added to a Y position separated at a prescribed distance from the X position is transmitted from the rib 4 from the rib 4 near the Y position which is lower in height towards the rib 4 of the X position which is high in height, while being dispersed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a cabinet storage case for storing boards, electronic components, and the like, and more particularly, to a shock distribution rib and a housing structure for protecting the inside from an externally applied shock.

[0002]

2. Description of the Related Art In a case for housing a substrate or an electronic component, for example, a cabinet, as a measure for preventing an instantaneous impact from being applied to the cabinet and destroying the inside, a conventional method is to mount the cabinet on the back side (inner wall surface). Ribs were provided to increase the rigidity of the cabinet.

[0003] Conversely, when electronic components and the like inside the cabinet are destroyed by the impact provided by the ribs provided on the cabinet, a method of removing the ribs has been adopted.

[0004]

However, when the ribs are removed as described above, the rigidity of the cabinet is lost. When the ribs are provided, the rigidity of the cabinet increases, but the ribs themselves destroy the inside of the cabinet. Was.

In this case, there has been no other method but to take measures such as newly inserting a cushion material in place of the rib.

[0006] The present invention has been made in view of the above points, and an object of the present invention is to provide an impact dispersion device in which ribs provided inside a housing can maintain the rigidity of the housing without breaking electronic components and the like inside the housing. It is to provide a rib and a housing structure.

[0007]

Means for Solving the Problems (1) The impact distribution rib according to claim 1 of the present invention for solving the above-mentioned problem is a rib of a predetermined length provided on an inner wall surface of a housing for housing a substrate. The height from the inner wall surface of the housing toward the substrate is highest at a position facing a support portion provided with a support member for supporting the substrate, and from a position facing the support portion. It is characterized by being formed continuously lower as the distance increases.

According to a second aspect of the present invention, a housing structure is provided on an inner wall surface of a housing for housing a substrate, and a height from the inner wall surface of the housing toward the substrate supports the substrate. It is characterized by having a rib that is the highest at a position facing the support site where the support member is provided, and that is continuously lowered as it is separated in a predetermined direction from the position facing the support site, The heights of the ribs are continuously reduced as the ribs are separated in a plurality of directions from a portion facing the support portion. (2) According to the present invention, the portion of the rib facing the supporting portion of the substrate is formed to have the highest height,
The tips of the ribs are in contact with or very close to the substrate. Therefore, when an impact is applied to the outer wall of the housing at a position where the rib is formed at the highest position, the rib can sufficiently withstand the impact. In addition, since the electronic component does not exist in the portion where the rib is formed at the highest position (supporting portion of the substrate), there is no influence on the electronic component.

[0009] A portion of the rib separated from a portion facing the support portion is formed to have a low height.
For this reason, the impact force when an impact is applied to the outer wall of the housing at this location is dispersed by transmitting the rib from the rib at the location to the rib at the location facing the support site. As a result, the impact applied to the outer wall of the housing at a location separated from the location facing the support portion of the substrate is supported at the location facing the support location.

At this time, even if a part of the housing is deformed inward due to the impact, since the height of the rib at a position separated from the position facing the support portion is low, the housing or the rib deformed inward and the substrate A gap is secured between them, and the electronic components on the substrate are not damaged or destroyed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross section of a main part of an embodiment in which the present invention is applied to a cabinet in which electronic components, substrates and the like are stored. In FIG. 1, reference numeral 1 denotes a cabinet, 2 denotes a printed wiring board for mounting electronic components, and 3 denotes a boss (rib) of a mechanical deck fixed to a chassis frame or the like and supporting the printed wiring board 2 from below.

Reference numeral 4 denotes a rib provided on the inner wall surface of the cabinet 1. The height of the rib 4 from the inner wall surface of the cabinet 1 toward the printed wiring board 2 is highest at a position facing the support portion of the boss 3, and is continuously lowered as the position increases from the position. . In FIG. 1, electronic components and the like on the printed wiring board 2 are not shown.

In the above configuration, it is assumed that an impact is applied to a portion X of the outer wall of the cabinet 1 as shown by an arrow in the drawing, which is opposed to a portion supported by the boss 3.
In this case, since the height of the rib 4 at the X portion is so high that its tip is very close to the printed wiring board 2, the rib 4 and the boss 3 can sufficiently withstand the impact.

At this time, since there are no electronic components or the like inside the cabinet near the X location, there is no adverse effect on the electronic components and the like.

It is also assumed that an impact is applied to a location Y on the outer wall of the cabinet 1 which is separated from the location X by a predetermined distance as shown by an arrow in the figure. In this case, the impact force is distributed by transmitting the ribs 4 from the ribs 4 in the vicinity of the low Y portion to the ribs 4 in the high X portion. As a result, the impact applied to the Y location on the outer wall of the cabinet 1 is dispersed by the ribs 4 and can be supported by the impact-resistant boss 3 and the ribs 4 opposed thereto.

At this time, even if the vicinity of the Y portion of the cabinet 1 is deformed inward due to the impact, the height of the ribs 4 in the vicinity is low, so that the inner wall or rib 4 of the cabinet 1 deformed inward and the printed wiring board 2, a gap is secured, and the electronic components on the substrate are not damaged or destroyed.

The ribs 4 may be provided on the inner wall surface of the cabinet 1 not only in one direction but also in two, three or more directions. In this case, the effect of dispersing the impact is further obtained. .

The height of the rib 4 is highest at a position facing the boss 3 which is a supporting portion, and is linearly lowered as the distance from the boss 3 increases.
The height of the rib may be changed in a curve as shown in FIG.

In FIG. 2, reference numeral 11 denotes a cabinet;
Denotes printed wiring boards for mounting electronic components, 13a and 13b
Is fixed to a chassis frame or the like, and the printed wiring board 1
This is the boss (rib) of the mechanical deck that supports 2 from below.

Reference numeral 14 denotes a rib provided on the inner wall surface of the cabinet 11. The height of the rib 14 from the inner wall surface of the cabinet 11 toward the printed wiring board 12 is
The height is highest at a position facing the support site of the bosses 13a and 13b, and is continuously lowered as the distance from the position increases. In FIG. 2, electronic components and the like on the printed wiring board 12 are not shown.

In the above configuration, the bosses 13a and 1b on the outer wall of the cabinet 11 as shown by arrows in the drawing are shown.
It is assumed that an impact is applied to the portions X ₁ and X ₂ facing the supporting portion by 3b. In this case, the height of the ribs 14 at the X ₁ and X _{2 positions} is such that
2, the rib 14 and the bosses 13a and 13b can sufficiently withstand the impact.

At this time, since there are no electronic components or the like inside the cabinet near X ₁ and X ₂ , there is no adverse effect on the electronic components and the like.

As shown by arrows in the figure, the X ₁ and X ₂
Y of the outer wall of the cabinet 11 separated from the location by a predetermined distance
Assume that an impact is applied to the location. The impact force in this case is
The ribs 4 are distributed along the ribs 14 from the ribs 4 near the low Y portion to the ribs 14 at the high X ₁ and X ₂ positions. As a result, Y of the outer wall of the cabinet 11
The impact applied to the location is dispersed by the ribs 14 and can be supported by the impact-resistant bosses 13a and 13b and the ribs 14 facing the bosses 13a and 13b.

At this time, even if the vicinity of the Y portion of the cabinet 11 is deformed inward due to the impact, since the height of the rib 14 in the vicinity is low, the inner wall or the rib 14 of the cabinet 11 deformed inward and the printed wiring board 12, a gap is ensured, and the electronic components on the substrate are not damaged or broken.

The ribs 14 may be provided on the inner wall surface of the cabinet 11 not only in one direction but also in two, three or more directions. In this case, the effect of dispersing the impact is further obtained. .

As described above, according to the embodiment of the present invention, even if the cabinet is deformed by an impact, a gap can be secured between the cabinet and the interior thereof while maintaining the rigidity of the cabinet. Dispersed in the substrate support portion (boss portion) that is strong against impact, and the internal electronic components and the like can be protected.

The present invention also relates to the cabinets 1, 11
The same operation and effect as described above can be obtained when the present invention is applied to a storage case including an upper case and a lower case, and other housings.

[0028]

As described above, according to the present invention, even if the housing is deformed by an impact, a gap can be secured between the housing and the housing while maintaining the rigidity of the housing. It can be dispersed at a strong substrate support site and protect internal electronic components and the like. Further, it is not necessary to insert a new cushioning material such as a cushioning material inside the housing, so that the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

1, 11: cabinet, 2, 12: printed circuit board, 3, 13a, 13b: boss, 4, 14: rib.

Claims (3)

[Claims] 1. A rib having a predetermined length provided on an inner wall surface of a housing for housing a substrate, wherein a height from the inner wall surface of the housing toward the substrate is a supporting member for supporting the substrate. An impact-dispersing rib, which is formed to be highest at a portion facing the provided support portion and to be continuously lowered as the distance from the portion facing the support portion increases. 2. A substrate provided on an inner wall surface of a housing for accommodating a substrate, wherein a height from the inner wall surface of the housing toward the substrate is opposed to a support portion provided with a support member for supporting the substrate. A housing structure comprising: a rib that is the highest at a location and that is continuously lowered as the distance from the location facing the support site increases in a predetermined direction. 3. The housing structure according to claim 2, wherein the height of each of the ribs is continuously reduced as the ribs are separated in a plurality of directions from a portion facing the support portion.