JPH11113111A - Power source case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a mechanical strength, and to enhance ventilation by making vent holes in a honeycomb on a power source case. SOLUTION: A switching power source 1 has an approximately box-shaped casing (a power source case) 3 made of an alluminum alloy fitted in such a way as to cover the power source body 2 put inside an apparatus body, and a large number of hexagonal vent holes 4 are provided in line, in the upper end side surfaces of the casing 3 corresponding to the vicinities of heat generating members of the power source body. Since the vent holes 4 of the casing 3 have a honeycomb shape, the width of a crosspiece between each vent hole 4 and an adjoining one is equal, and it becomes possible to obtain sufficient opening and to have an excellent ventilation. Besides, the mechanical strength of each vent hole 4 becomes uniform, and the strength does not lower partially, and besides a load caused by a temperature change is not generated either, since the width of a crosspiece between each vent hole 4 and an adjoining one is equal, so the they become stronger as a whole. Moreover, it is difficult for foreign matters such as a screw, etc., to enter from the vent holes 4, since the maximum width of the vent holes 4 is smaller, compared to the opening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a case of a power supply device such as a switching power supply.

[0002]

A power supply device such as a switching power supply is widely used for various electronic devices and the like as a device for receiving a commercial AC voltage as an input and generating a stable DC output required for the electronic devices and the like. . In such a power supply device, various components built in the power supply device generate heat depending on use conditions. Therefore, in order to prevent the heat from being trapped in the device, the casing (case) of the power supply device is particularly close to the heat-generating components. A large number of circular ventilation holes are formed in the device to release heat generated in the device to the outside.

However, in the above prior art,
Since the holes formed as the ventilation holes are circular, if the circular holes are formed continuously, the crossbar formed between the adjacent ventilation holes changes its width along an arc and has a narrow portion. A wide part can be formed. For this reason, in order to obtain sufficient mechanical strength, the interval must be set based on the narrow portion, and the opening area is wasted by the wide portion, so it is necessary to secure a sufficient opening area. There was a problem that it was not possible. Moreover, since the amount of thermal expansion due to the temperature rise due to heat radiation is different between the narrow portion and the wide portion, a load is applied to the cross between the vent holes, and deformation or the like is likely to occur at this point.

Therefore, it has been practiced to secure a sufficient opening area of the ventilation holes by making the ventilation holes square and to make the width of the cross-bar between adjacent ventilation holes the same. If the length of one side of the ventilation hole is increased in order to secure it, the maximum width of the ventilation hole is diagonal, so that there is a problem that foreign substances such as screws may enter the device.

In view of the above problems, an object of the present invention is to provide a power supply case having excellent mechanical strength and good air permeability.

[0006]

According to a first aspect of the present invention, there is provided a power supply case which receives a predetermined voltage as an input and generates an output required for various devices. It is formed in a honeycomb shape.
By adopting such a configuration, by connecting the substantially hexagonal ventilation holes continuously, the width of the bar between the adjacent ventilation holes can be made equal, so that a sufficient opening area can be secured. The air permeability is good. In addition, since the width of the bar between adjacent vents is the same and the shape is honeycomb, the mechanical strength of the vents is uniform and there is no partial decrease in strength. Since they are uniform and do not generate a load on the crosspiece between the ventilation holes, the strength is improved as a whole.
In addition, since the maximum width of the hole is smaller than the opening area, there is an effect that foreign matters such as screws are hardly mixed from the vent hole.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a power supply case according to the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a switching power supply serving as a power supply device. The switching power supply 1 has a substantially rectangular box shape as an aluminum alloy power supply case attached so as to cover a power supply main body 2 installed in a device main body. A plurality of hexagonal ventilation holes 4 are provided in a honeycomb shape in the vicinity of the heat generating member of the power supply main body on the upper surface and side surfaces of the casing 3. In FIG. 1, reference numeral 5 denotes a printed circuit board, and reference numeral 6 denotes various electronic components constituting the power supply body 2 mounted on the printed circuit board.

The operation of the above configuration will be described. When a commercial AC voltage is input to the switching power supply 1 and an electronic device is connected to output a DC current, various electronic components 6 constituting the power supply main body 2 generate heat. The heat generated in the switching power supply 1 is released to the outside by the air flowing in and out of the ventilation holes 4, so that the heat does not stay in the switching power supply 1. On this occasion,
This vent hole 4, as shown in FIG. 2 is a hexagon, since the sequence vents 4 of the hexagon in a honeycomb shape, the width D ₁ of the crosspiece 7 between 4 adjacent each vent is also ing.
Therefore, an opening area is sufficiently large as compared with the case of a circular vent holes 4a in which securing the width D ₁ of the same crosspiece 7, as shown by a one-dot chain line in FIG. 2, the heat has good breathability Can be quickly and sufficiently discharged. Further, since the width D ₁ of the crosspiece 7 between 4 adjacent each vent is honeycombed mechanical strength becomes uniform, and so never take load by thermal expansion, thereby the mechanical It has improved strength. Furthermore, compared with the vent holes 4b of the square of the same width as indicated by the two-dot chain line in FIG. 2, diagonal dimension d ₂ of the maximum width D ₂ vents 4b
Smaller enough to make it harder for foreign matter such as screws to enter.

As described in detail above, the casing 3 of the switching power supply 1 of this embodiment is
Are formed in a honeycomb shape, so that each adjacent ventilation hole 4
Since the width of the crosspiece 7 can be made the same, a sufficient opening area can be secured and the air permeability is good. Further, there is no partial reduction in strength and mechanical strength of the vent hole 4 parts the width D ₁ of the crosspiece 7 between 4 adjacent each vent is the same was homogeneous, even more load due to temperature changes Since these do not occur, the strength is improved as a whole. Moreover, since in comparison with the opening area aperture maximum width D ₂ is small, foreign matters such as screws effect so that it is difficult mixed from vent pores 4.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, the ventilation hole 4 is a regular hexagon, but is not limited to this, and may be a hexagon with a rounded corner. Further, the power supply device to which the present invention can be applied is not limited to a switching power supply, but can be applied to various power supply devices as long as they have ventilation holes.

[0011]

According to the present invention, in a case of a power supply device which receives a predetermined voltage as input and generates an output required for various devices, a vent hole of the case is formed in a honeycomb shape, and mechanical strength is improved. It is possible to provide a power supply case with excellent air permeability.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a power supply case according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view showing the ventilation hole.

[Explanation of symbols]

 Reference Signs List 1 switching power supply (power supply unit) 3 casing (case) 4 ventilation hole

Claims (1)

[Claims] 1. A power supply case, wherein a vent of the case is formed in a honeycomb shape in a case of a power supply device which receives a predetermined voltage and generates an output required for various devices.