JPH0846379A - Fixing structure for cooling fan - Google Patents

Abstract

PURPOSE:To obtain a fixing structure of a fan for cooling the inside of the housing of an electronic apparatus through forced ventilation in which the cooling fan can be fixed and removed surely in a short time. CONSTITUTION:A duct for supplying/discharging the air into/from the inside of a housing 9 is provided, at one end thereof, with a lid 2 applied airtightly to the fringe part so that it can be opened/closed easily. The lid 2 is fixed; on the inner side face thereof, with a cooling fan 1 and a cover 8 of the housing 9 is provided, at a part corresponding to the lid 2, with a cut 84 larger than the lid 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling fan mounting structure for forcedly ventilating the internal heat generated in the housing of electronic equipment to cool it by air.

In recent years, electronic devices have been remarkably miniaturized and packaged with high density due to remarkable high performance and high density of electronic parts, especially semiconductor parts. But the small size of the equipment,
High-density mounting requires an increase in internal heat generation per unit volume, and it is required to enhance its cooling capacity.In the case of air cooling as well, most of the natural convection air cooling will be forced air cooling using a cooling fan, and it will be even more extreme. The jet jet air cooling has come to be used, and liquid cooling has come to be put to practical use.

The cooling fan used for such forced air cooling is required to have higher performance and higher reliability.

[0004]

2. Description of the Related Art FIG. 4 shows an example of a conventional forced air-cooled electronic device, (a) is an external perspective view of the electronic device, and (b) is a state in which a cover is removed.

As shown in FIG. 4, in a conventional forced air-cooled electronic device, a plurality of circuit units 7 are arranged side by side in a housing 9 and plug-in mounted, and a duct is formed vertically between them. The upper plate 97 of the housing 9 at the upper end of the duct is partitioned by the duct, and the cooling fan 19 for exhaust is screwed to the inner side surface. Of course, although not shown, the bottom surface of the casing 9 has a ventilation hole for intake, a ventilation hole 98 for exhaust is provided on the upper plate of the casing 9, and dustproof covering the outer shape of the casing 9 is provided. Ventilation holes 88 are also provided at positions corresponding to the ventilation holes 98 of the cover 89 for preventing touch and electromagnetic interference, and the inside of the duct is forcibly ventilated from the bottom to the top by the cooling fan 19 for cooling.

[0006]

However, the cooling fan 19 is constantly rotating while the equipment is operating,
It has a limited service life including bearings and is shorter than other electronic parts.To replace or inspect this cooling fan 19 due to an abnormality, remove the cover 89 from several fixing screws, and then remove it. The upper plate 97 can be removed by removing the fixing screws at several places, removing the wiring of the predetermined cooling fan 19 on the inner surface thereof, and then removing the fixing screws at several places. To install the cooling fan 19, tighten the fixing screws in the reverse order of the above to fix, then install the upper plate 97 and cover.
89 is over and it ends. As described above, the cooling fan 19 is attached / detached by tightening / removing it with a large number of fixing screws, which does not make the working man-hours ridiculous. If this took a long time, the operation of the equipment had to be limited or stopped. Furthermore, there is a risk that each fixing screw may fall into the inside of the housing 9 upon removal, causing a short circuit or loss. There were problems such as.

In view of the above problems, it is an object of the present invention to provide a cooling fan mounting structure in which the cooling fan can be easily attached / detached in a reliable and short time.

[0008]

The above-described object is to achieve the above-mentioned objects with reference to FIGS.
As shown in (1), an opening / closing lid 2 that is airtightly contacted with an edge and is openable / closable outside is provided at an end of a duct for exhausting or inhaling air from the inside of a housing 9 of an electronic device. Cooling fan 1 on the side
This is achieved by the cooling fan mounting structure of the present invention. (2) Further, if there is a cover 8 for covering the casing 9, the opening / closing lid 2
This is achieved by the cooling fan mounting structure of the present invention, in which the corresponding portion is provided with a larger cutout portion 84 or a cutout portion. (3) The above-described cooling fan mounting structure in which the fan mounting member 3 that guides the outer shape and presses and closely contacts the cooling fan 1 at a predetermined position is provided on the inner side surface of the opening / closing lid 2 is also suitable. (4) Further, the cooling fan 1 is pressed against the inner surface of the opening / closing lid 2 via the airtight elastic member 4 to be in close contact with the inner surface of the opening / closing lid 2. (5) The cooling fan mounting structure is also suitable, in which the fan mounting member 3 is provided with the connector 5 and the wiring of the cooling fan 1 is connected to the connector.

[0009]

That is, as shown in the principle configuration diagram of the present invention in FIG. 1, an opening / closing lid 2 is provided at the exhaust portion or the intake portion at the end of the duct for cooling the casing 9, and the cooling fan 1 is provided on the inner side surface thereof. Since the corresponding portion of the cover 8 that is attached is the removal portion 84, the cooling fan 1 inside can be contacted by simply opening the opening / closing lid 2 without removing the cover 8, which is extremely simple.

Further, since the opening / closing lid 2 is in air-tight contact with the edge portion of the duct, the cooling fan 1 does not suck air from the outside of the duct in the vicinity and reduce the cooling efficiency.
Furthermore, the cooling fan 1 is guided to a predetermined position by the fan mounting member 3, and is pressed and closely fixed by the elastic member of the fan mounting member 3. For example, in a box-shaped fan mounting member 3 having two open surfaces as shown in FIG. 2, ventilation holes 81 are formed in the bottom surface, and pressing leaf springs 34 are provided on both sides, and the cooling fan 1 is opened from one open side surface. When the cooling fan 1 is inserted and pushed to a predetermined position, both side surfaces of the cooling fan 1 are guided by contacting both side surfaces of the fan mounting member 3 and pressed against each other by the leaf spring 34, and the front end abuts against the inner side surface of the cooling fan 1. Is attached to.

Further, as shown in FIG. 3, the fan mounting member 33 has a shallow box lid shape for guiding one end surface of the cooling fan 1, and a bent spring member 35 is rotatably mounted on the opposite side. , The cooling fan 1 is placed on the fan mounting member 33, and the spring member 35 is rotated to hang the end portion on the upper end surface of the cooling fan 1 by applying a spring to the cooling fan 1 to the fan mounting member 33 side. Can be pressed and tightly fixed.

As a result, the cooling fan 1 is simply and securely fixed without using screws. Furthermore, in the latter case, if the air-tight elastic member 4, for example, a rubber plate, is pressed and fixed to the contact surface of the cooling fan 1, the cooling fan 1 will be in close contact with the cooling fan 1.
There is no leakage of ventilation before and after, improving cooling efficiency,
Moreover, fixing is easy and reliable.

Further, by connecting the wiring of the cooling fan 1 to the connector 5 provided on the housing 9 side,
You can connect securely. In this connector connection, there is a connector in the middle of the wiring cable that can be freely disconnected and connected, and the structure other than the connector is guided and fixed at a predetermined position, and the connectors fixed to each structure are Including the case of plug-in connection.

Thus, the cooling fan mounting structure of the present invention can be obtained in which the cooling fan can be easily attached / detached in a reliable and short time.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. Throughout the drawings, the same reference numerals denote the same objects. FIG. 2 shows an embodiment of the present invention, (a) is an external perspective view, (b) is a configuration perspective view, and FIG. 3 is a configuration perspective view of another embodiment of the present invention.

The embodiment of the present invention is applied to a digital concentrator / multiplexer, and is a wall-mounted or self-supporting case 9 having a height of 50 × width of 50 × depth of 26 cm, and a maximum of eight circuit units 7 inside.
Is plug-in mounted, the external connection cable is introduced from the lower part of the housing 9 and the connector is connected, and the cooling of the internal heat is sucked from the ventilation holes (not shown) in the lower part of the housing 9 and passes through the ducts. The cooling fan 1 at the end of the duct at the top of the housing 9 passes through the duct formed between the circuit units 7.
It is accelerated by and goes through a path for exhausting air from the ventilation hole 21 opened in the opening / closing lid 2.

The front, top and both sides of the case 9 are covered with a metal cover 8, and a part of the top, a corresponding portion of the opening / closing lid 2 is provided with a recess 84, and further, a ridge is formed on one edge. The display section 85 for displaying the operating state is exposed.

The opening / closing lid 2 partitions a part of the upper plate of the housing 9 and a mounting portion of the cooling fan 1, has a ventilation hole 21, is attached to the outside by a hinge 25 so as to be openable / closable, and is further attached to the outside. Without a business trip, a bag-like handle (not shown) is provided, a turning lock lever 23 for locking when closed is provided, and a rubber gasket 24 is provided at the peripheral edge portion so that the duct edge and the inner surface are airtightly adhered to each other. It is pasted on.

In one embodiment, as shown in FIG. 2, an opening / closing lid 2 of 20 × 40 cm is provided on the upper surface of a casing 9, and two axial flow type cooling fans 1 are attached to a fan attaching member 3. is there. The fan mounting member 3 is a box-shaped member having an open upper surface and one side surface formed of a thin steel plate, a ventilation hole 32 formed in the bottom surface, and two curved stainless steel strips on both inner sides. The leaf spring 34 is welded and fixed, and the projecting pieces 36 provided with slits 37 on both side edges of the open side surface of the bottom face are provided to face each other on a business trip. The fixing rod 39 is provided with its end portion tied to a string whose one end is fixed in the vicinity, and further, a notch portion 38 is opened in the center upper part of the opposite side surface, and the connector 5 is opened at a predetermined position. It is fixed toward.

The fan mounting member 3 is used as the opening / closing lid 2
The side edges of the cooling fan 1 are fixed to the inner surface of the cooling fan 1 by welding, and a wiring cable from the inside of the device to the cooling fan 1 is terminal-connected to the connector 5.

As a result, the cooling fan 1 having the connector 55 fitted and connected to the connector 5 mounted at a predetermined position and having internal wiring is provided on the open side surface of the fan mounting member 3 from which the fixing rod 39 is removed, and the connector 55 is located on the head side. Then, if both sides of the cooling fan 1 are guided by both sides of the fan mounting member 3 and proceed, the leaf springs 34 on the bottom face press the inner surface of the opening / closing lid 2 to move the head. At the same time that the side edge of the side abuts against the side surface of the inner part, the connector 55 is plugged into the connector 5 to be connected to the connector 5, and the fixing rod 39 is hung between the slits 37 of the projecting piece 36 for the purpose of retaining, and the mounting is completed. .

Further, the second cooling fan 1 is also mounted in the same manner, then the opening / closing lid 2 is closed, and the rotary lock lever 23 is rotated while being pressed to be locked to complete the operation. In addition, for removal, the rotation lock lever 23 is rotated while pressing the opening / closing lid 2 to release the lock, and the opening / closing lid 2 is opened by holding a handle (not shown) and brought into contact with the cooling fan 1.

First, the fixing rod 39 of the predetermined cooling fan 1 is removed. Next, one end of the fixing rod 39 is inserted into the notch 38 on the opposite side of the fan mounting member 3 and is pressed against the side surface of the cooling fan 1 to push out the cooling fan 1 for easy removal. At the same time, the connector connection is automatically disconnected.

As described above, the fixing screw is not used at all for mounting and removing the cooling fan 1, and the removed member is not dropped or lost, and the work is simple, reliable, and can be performed in a short time. In the other embodiment, as shown in FIG. 3, only the points different from the one embodiment will be described.

The fan mounting member 33 fixed to the inner side surface of the opening / closing lid 2 is a box lid shape whose periphery is bent according to the outer shape of the end surface of the cooling fan 1, and has a ventilation hole 32 formed in the center thereof. An airtight elastic member 4 made of a rubber plate having a circular hole 41 having the same diameter and the same diameter as the ventilation hole 32 is tightly attached and fitted. One end of a spring member 35 is rotatably attached to the two opposing bent pieces. Installed.
Further, the connector 5 is fixed to the other bent piece at a position where it can be easily inserted and removed.

The spring member 35 is formed by bending a spring stainless steel plate into a shape of Mt. Fuji and expanding the skirt to generate a reaction force. One end of the spring member 35 is a fan mounting member.
It is attached to the bent piece of 33, and the other end is shaped so as to be hooked on the end surface of the cooling fan 1 and to be easily detached by fingers.

The fan mounting member 33 is fixed to each of the cooling fan 1 mounting positions on the inner surface of the opening / closing lid 2 with the ventilation holes 32 concentric with each other, and fixed by welding. The wiring cable to is connected to the terminal.

As a result, the cooling fan 1 having the connector 55 at the wiring end is placed on the ventilation hole 32 of the fan mounting member 33 in which the spring member 35 is rotated outward, and any one of the upper end surfaces of the cooling fan 1 is placed. The side of the spring member 35 is pressed with a finger to compress the airtight elastic member 4 and pull the spring member 35 on that side to spread the end, and the end portion is hooked on the end face, and then the spring member 35 is also attached to the opposite side. Then, the connector 55 is finally connected to the connector 5, and the mounting is completed.

Further, the second cooling fan 1 is similarly mounted, and then the opening / closing lid 2 is closed and locked to complete the process. For removal, the opening / closing lid 2 is opened and brought into contact with the cooling fan 1.

First, the connector 55 is disconnected from the connector 5 to disconnect the connection. Next, while pressing the predetermined cooling fan 1, the two spring members 35 hooked on the end face of the cooling fan 1 are successively hooked and unhooked, so that the fan can be easily taken out.

As described above, the fixing screw is not used at all for mounting and removing the cooling fan 1, and the removed member is not dropped or lost, and the work is simple, reliable, and can be performed in a short time. Each of the above-described embodiments shows an example, and the configuration, dimensions, and materials of each part are not limited to the above.

Although the position of the opening / closing lid 2 is the upper surface of the housing 9,
It may be on the side or front as long as it can be handled and opened to the outside. Also, its opening / closing and locking mechanism is hinge 25.
Although the rotation lock lever 23 is used, well-known techniques such as a pivot support mechanism and a slide mechanism may be used, and the movable portion of the lock mechanism may be provided on the housing 9 side.

Although the gasket 24 is attached to the opening / closing lid 2 for airtightly closing the duct edge, the gasket 24 may be provided on the duct edge. As for the mechanism of the fan mounting members 3 and 33, other known techniques may be used as long as they are simple, reliable, can be operated in a short working time, and there is no member that comes off.

[0034]

As described above, according to the cooling fan mounting structure of the present invention, a cooling fan mounting structure can be obtained in which the cooling fan can be easily attached / detached, reliably and in a short time, and the cooling fan is removed except the cooling fan. There is no member, and it is possible to eliminate dropping and loss of the removed member, short circuit failure, etc., and the practical effect is extremely large.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention.

FIG. 2 is an embodiment of the present invention (a) external perspective view (b) structural perspective view

FIG. 3 is a configuration perspective view of another embodiment of the present invention.

FIG. 4 is a conventional example of forced air-cooled electronic equipment (a) External perspective view of electronic equipment (b) Cover removal state diagram

[Explanation of symbols]

1,19 Cooling fan 2 Open / close lid 3,
33 Fan mounting member 4 Airtight elastic member 5,55 Connector 7
Circuit unit 8,89 Cover 9 Case 2
1,32,81,88,98 Ventilation hole 23 Pivot lock lever 24 Gasket 25
Hinge 34 Leaf spring 35 Spring member 36
Protrusion 37 Slit 38 Notch 39
Fixed rod 41 Circular hole 84 Pull-out part 85
Display 97 Upper plate

Claims (5)

[Claims] 1. A structure for mounting a cooling fan for forcedly ventilating internal heat of a casing of an electronic device to perform air cooling, wherein airtightness is provided at an end portion of a duct for exhausting or sucking air from the inside of the casing. An attachment structure for a cooling fan, comprising an opening / closing lid which is in contact with the outside and is openable / closable, and a cooling fan is attached to an inner surface of the opening / closing lid. 2. The cooling fan mounting structure according to claim 1, wherein a larger opening or notch is provided in a corresponding portion of the cover that covers the housing. 3. The cooling fan mounting structure according to claim 1, further comprising a fan mounting member which guides the outer shape of the cooling fan and presses the cooling fan to a predetermined position so as to closely contact the inner surface of the opening / closing lid. 4. The mounting structure for a cooling fan according to claim 3, wherein the cooling fan is pressed against the inner surface of the opening / closing lid via an airtight elastic member so as to be closely fixed. 5. The cooling fan mounting structure according to claim 3, wherein the fan mounting member is provided with a connector, and the wiring of the cooling fan is connected to the connector.