JP3261670B2 - Fan unit for electronic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan unit used for cooling electronic equipment such as a telephone exchange.

[0002]

2. Description of the Related Art In electronic equipment in the communication field, for example, telephone exchanges, a plurality of board units having a predetermined function by mounting electronic components on a printed board are arranged such that each board surface is vertical. The fan units are mounted in parallel and in multiple stages in the equipment rack (shelf), but since the electronic components mounted on each board unit include heat-generating electronic components, a fan unit is inserted between the upper and lower board units. It is arranged and cooled by this fan unit.

FIG. 2 is a perspective view showing a schematic structure of a conventional fan unit for electronic equipment of this kind. In the drawing, reference numeral 1 denotes a front plate of the fan unit, and two rail-shaped support members 2 are provided in parallel on the back surface of the front plate 1.
A printed circuit board 3 having a ventilation hole thereon is fixed so as to be horizontal to the vertical front plate 1.

A fan 4 has rotating blades 5 and a housing 6 for supporting the rotating blades. The fan 4 has the rotating blades 5 facing the ventilation holes of the printed circuit board 3, and the four corners of the housing 6 and the printed circuit board 3. A nut 8 on the lower surface side of the printed circuit board 3
Are fixed on the printed circuit board 3 by screwing.

Reference numeral 9 denotes a terminal portion provided on the printed circuit board 3 and 10 denotes a terminal portion provided on the outer peripheral surface of the housing 6 of the fan 4. The terminal portions 9 and 10 are formed by soldering a cable 11. Connected, whereby the fan 4 is electrically connected to the printed circuit board 8. 1
Reference numeral 2 denotes a fuse indicating a power supply state to the fan 4;
Are mounted on the printed circuit board 3 together with a light emitting diode (not shown) indicating the driving state of the front panel 1 and can be seen through a window provided on the front surface of the front plate 1.

Reference numeral 13 denotes a connector for external connection provided on the rear end side of the printed circuit board 3, and reference numeral 14 denotes a handle provided on the surface of the front plate 1. The fan unit with such a configuration is
When the user holds the handle 13 and inserts it from the rear end of the printed circuit board 3 into the upper and lower stages of the board units mounted on the device rack, a connector provided on the device rack side is provided at the rear end of the printed circuit board 3. External connection connector 13 is fitted,
As a result, the printed circuit board 3 is supplied with power, so that the fan 4 is driven to rotate the rotating blades 5, and the fuse 12 and the light emitting diode (not shown) function.

[0007] The rotation of the rotary blades 5 generates a flow of wind that sucks air from the lower surface side of the printed circuit board 3 and exhausts air upward, thereby forcibly cooling the board units in the upper and lower stages. At this time, the front plate 1 of the fan unit will serve eyes to prevent wind leakage from the device rack front portion.

A fan provided on the printed circuit board 3
The number 4 differs depending on conditions such as the amount of heat generated by the board units mounted on the upper and lower stages and the dimensions of the board units.

[0009]

However, in the above-mentioned prior art, since the fan is fixed on the printed circuit board with the long-axis screw and the nut, the fan for passing the long-axis screw through the printed circuit board is required. A plurality of holes must be provided, so that it is necessary to avoid through holes in the wiring pattern of the printed circuit board, and there is a problem that the degree of freedom of wiring is limited.

[0010] Further, when the replacement of the fan due to the wear of the bearing of the fan, the life of the grease, or the like, or the replacement of the fan due to the failure occurs, not only the tool for removing the long shaft screw and the nut is required, but also Even after removing the long axis screws and nuts, the troublesome work of removing and reconnecting the cable soldered to the fan and the terminal part of the printed circuit board, and re-fixing with the long axis screws and nuts is required, It takes a long time to replace the fan, and in electronic devices that are constantly operating, such as telephone exchanges, it will hinder cooling of the board unit during fan replacement. Therefore, there is a problem that the fan unit has to be replaced every time, and the cost increases.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has a structure in which a fan is fixed on a printed circuit board having ventilation holes, and is mounted on an electronic device in a device frame. In the electronic device fan unit disposed between the upper and lower substrate units, and cooling the upper and lower substrate units by the rotation of the fan,
Rutotomoni a plurality of connectors on said printed circuit board so as to be positioned across the vents, the connector pair
A plurality of connectors Nasu provided on the fan, the plurality
At least one of the connector pairs
For fixing and electrical connection of the printed circuit board and the fan
And a dummy connector using the other only for fixing the fan.
As data pairs, by fitting these connectors pairs to fix the fan on said printed board, characterized in that an electrical connection.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a fan unit for electronic equipment according to the present invention.
In the figure, 1 is a front plate of the fan unit, 2 is a support member,
Reference numeral 3 denotes a printed circuit board, 4 denotes a fan, 5 denotes rotating blades, 6 denotes a housing, 12 denotes a fuse, 13 denotes an external connection connector, and 14 denotes a handle. I have.

Reference numeral 15 denotes a ventilation hole provided on the printed circuit board, and is provided with a diameter larger than the outer diameter of the rotary blade 5 of the fan 4. 16 is a connector provided on the printed circuit board 3 so as to be located on both sides of the ventilation hole 15, and 17 is a housing 6 of the fan 4 so as to correspond to the connector 16.
The fan 5 is fixed on the printed circuit board 3 by making one of the connectors 16 and 17 a male and the other a female and fitting them together, and the electrical connection is made. .

A fan provided on the printed circuit board 3
The printed circuit board 4 is the same as the conventional one in that the number of mountings differs depending on conditions such as the amount of heat generated by the board units mounted on the upper and lower stages and the dimensions of the board unit.
Is provided with a light emitting diode (not shown) together with the fuse 12, and the fuse 12 and the light emitting diode can be viewed from a window provided in front of the front plate 1 in order to confirm the power supply state and the driving state of the fan 4. Is the same.

The fan unit having such a configuration is
When inserted between the upper and lower stages of the board unit mounted on the apparatus rack from the rear side of the printed circuit board 3 with the handle 1 4, the connector provided in the apparatus rack side to the rear end side of the printed circuit board 3 The provided external connection connector 13 is fitted,
As a result, the printed circuit board 3 is supplied with electric power, and the fan 4 is driven to rotate the rotary blades 5, so that a flow of air is drawn in from the lower surface side of the printed circuit board 3 and exhausted upward. The substrate unit can be forcibly cooled.

[0016] At this time, the front plate 2 of the fan unit to serve eyes to prevent wind leakage from the device rack front portion is the same as that of the conventional. By the way, in the present invention, the fan 4 is fixed on the printed circuit board 3 by changing the connector 17 provided on the housing 6 of the fan 4 to the connector 16 provided on the printed circuit board 3 as described above.

[0017] Therefore, when the replacement by failure of the fan 4 is required, pulling the fan unit from the apparatus rack with the handle 1 4, when pulled upward by hand housing 6, the housing 6 of the fan 4 Connector 1 provided
7 is removed from the connector 16 provided on the printed circuit board 3, and the fan 4 is detached from the printed circuit board 3. Then, the connector 17 provided on the housing 6 of the replacement fan 4 is newly connected to the connector 16 on the printed circuit board 3 b. When the fan unit is fitted to the original position of the device rack, the external connection connector 13 is fitted again to the connector provided on the device rack side, and the fan unit returns to a normal state.

In the above-described embodiment, the connector 16 on the printed circuit board 3 and the connector 17 on the fan 4 are
A pair is provided to fix the fan 4 to the printed circuit board 3 and make an electrical connection. However, if there is only one electrical connection, the other pair has only a fixed function as a dummy. What should I do?

[0019]

As described above, according to the present invention, a plurality of connectors are provided on a printed circuit board so as to sandwich the ventilation hole, and a plurality of connectors are provided on the fan so as to correspond to the connectors. Te, thereby fixing the fan on said printed circuit board by fitting a plurality of connectors, since a structure for electrically connecting, through a major axis screw for fans fixed to the printed board through hole Need not be provided, and the wiring pattern of the printed circuit board does not need to consider through holes, so that the effect of improving the degree of freedom of wiring can be obtained.

When it is necessary to replace the fan, the fan can be removed from the printed circuit board simply by pulling out the fan unit from the apparatus frame and lifting the fan, and the connector for the new fan can be fixed in the same manner. It can be done by mating, so there is no need for conventional tools when replacing the fan, greatly reducing man-hours and time, and reducing costs by replacing the fan itself. The effect is also obtained, and particularly, it is extremely effective as a fan unit of an electronic device which is always operating such as a telephone exchange.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a fan unit for electronic equipment according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a conventional electronic device fan unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front plate 2 Support material 3 Printed circuit board 4 Fan 5 Rotating blade 6 Housing 12 Fuse 13 Connector for external connection 15 Ventilation hole 16 Connector 17 Connector

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 6-2780 (JP, U) JP-A 59-18494 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05K 7/20 H05K 7/12

Claims (1)

(57) [Claims] An electronic apparatus has a structure in which a fan is fixed on a printed circuit board having a ventilation hole, and is disposed between an upper and a lower substrate units mounted on an electronic device. in electronics fan unit for cooling the stage of the substrate unit, Rutotomoni a plurality of connectors on said printed circuit board so as to be positioned across the vents, the connector pair
A plurality of connectors Nasu provided on the fan, the plurality
At least one of the connector pairs
For fixing and electrical connection of the printed circuit board and the fan
And a dummy connector using the other only for fixing the fan.
A fan unit for an electronic device, wherein the fan is fixed on the printed circuit board and an electrical connection is made by fitting these connector pairs as a connector pair .