JPH0736483U - Ventilation opening / closing mechanism for electronic devices - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a ventilation hole opening / closing mechanism for an electronic device which is excellent in maintainability and does not depend on an operator for opening / closing operation of the ventilation hole due to a change in outside air temperature. [Structure] Ventilation holes 2 and 3 provided in a housing 1 of an electronic device
In a ventilation hole opening / closing mechanism for an electronic device that opens and closes, a shape memory coil spring 5 that constantly contacts outside air around the electronic device and changes in plasticity with an outside air temperature that requires ventilation for the electronic device as a predetermined temperature, and the shape memory coil spring Bias spring 6 that interlocks with 5 and does not plastically change itself due to temperature change 6
A shaft 7 for holding the shape memory coil spring 5 and the bias spring 6, and the shaft 7 fixed to one end of the shaft 7.
The opening / closing plate 8 having the square holes 11 facing the ventilation holes 2 and 3 provided in the housing 1 is provided, and the opening / closing plate 8 and the square holes 11 of the opening / closing plate 8 move due to the plastic change of the shape memory coil spring 5.
The ventilation holes 2 and 3 provided in the are opened and closed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ventilation mechanism for an electronic device, and more particularly to a ventilation hole opening / closing mechanism for an electronic device that opens / closes a ventilation hole provided in a housing of the electronic device.

[0002]

[Prior art]

 4A and 4B are perspective views showing a conventional ventilation hole opening / closing mechanism. FIG. 4A shows a state in which the ventilation hole is opened, and FIG. 4B shows a state in which the ventilation hole is closed.

In FIG. 4, the housing 13 is provided with a plurality of ventilation holes 14. Further, the guide screw 16 attached to the housing 13 and the groove 17 of the slide plate 15 are fitted to each other, and the slide plate 15 can be slid up and down by the guide screw 16. When ventilation is required for the electronic device, the slide plate 15 is moved to the upper position to open the ventilation hole 14, and when ventilation is not required, the slide plate 15 is moved to the lower position. 14 is closed. After this upward and downward movement, the slide plate 15 is fixed by the guide screw 16.

[0004]

[Problems to be solved by the device]

 However, in such a conventional structure, there is a problem that an operator must open and close the ventilation hole due to a change in the outside air temperature. Therefore, if an operator mistakes the opening / closing timing of the ventilation hole or if the opening / closing operation of the ventilation hole is delayed due to a sudden change in the weather, the internal equipment of the device may malfunction.

In order to eliminate the above-mentioned problems, the present invention provides a ventilation hole opening / closing mechanism for an electronic device which is excellent in maintainability and does not rely on the operator to open / close the ventilation hole due to changes in the outside air temperature. The purpose is to provide.

[0006]

Means for Solving the Problems The present invention provides a ventilation hole opening / closing mechanism for an electronic device that opens and closes a ventilation hole provided in a housing of the electronic device, and is constantly in contact with the outside air around the electronic device, and A shape memory coil spring whose plasticity changes with the outside air temperature that requires ventilation as a predetermined temperature, and a bias spring that interlocks with the shape memory coil spring and that does not plastically change by temperature change, a shape memory coil spring and the bias spring. And an opening / closing plate that is fixed to one end of the shaft and has a hole facing the ventilation hole provided in the housing. The opening / closing plate and the opening / closing plate are opened and closed by the plastic change of the shape memory coil spring. The holes provided in the plate move to open and close the ventilation holes provided in the housing.

[0007]

[Action]

 With the above configuration, when the outside air temperature around the electronic device becomes higher than the predetermined temperature at which the shape memory coil spring plastically changes, the elastic force of the shape memory coil spring decreases and the shape memory coil spring is pushed by the bias spring. Therefore, the shaft holding the shape memory coil spring and the bias spring and the opening / closing plate fixed to one end of the shaft are pushed out and moved, and the ventilation holes provided in the housing and the holes provided in the opening / closing plate are provided. Perforations penetrate through to allow ventilation of electronic devices.

Further, when the outside air temperature around the electronic device becomes lower than a predetermined temperature at which the shape memory coil spring plastically changes, the shape memory coil spring increases the elastic force by the plastic change and pushes the bias spring. Therefore, the shaft holding the shape memory coil spring and the bias spring and the opening / closing plate fixed to one end of the shaft are pulled and moved, and the ventilation hole provided in the housing and the hole provided in the opening / closing plate are moved. And are closed to prevent ventilation of electronic devices.

[0009]

【Example】

 1 is a perspective view showing an embodiment of a ventilation hole opening / closing mechanism of an electronic device according to the present invention, FIG. 2 is a perspective view showing an embodiment of an electronic device using the ventilation hole opening / closing mechanism of FIG. 1, and FIG. It is operation | movement explanatory drawing of the ventilation hole opening / closing mechanism of FIG.

In FIG. 2, a casing 1 of an electronic device has electronic components inside, and an internal temperature is kept in a constant temperature range by an intake hole 2 and an exhaust hole 3 used as ventilation holes. Here, the housing 1 is provided with an opening 4 on both the intake hole 2 side and the exhaust hole 3 side, and the shape memory coil spring 5 comes into contact with the outside air around the device in the opening 4. Have been installed. An opening / closing plate 8 is slidably mounted inside the intake hole 2 and the exhaust hole 3.

In FIG. 1, the opening / closing plate 8 is provided with a plurality of square holes 11 and a blocking portion 12 between the square holes 11, and is fixed to the shaft 7 by a set screw 9. The holding metal fitting 18 is fixed to the housing 1 and slidably holds the shaft 7. The shaft 7 holds a shape memory coil spring 5 and a bias spring 6, and a partition plate 10 is provided between them.

The opening / closing operation will be described with reference to FIG. 3 (a) is a front view showing the case where the opening / closing plate 8 is in the open state, FIG. 3 (b) is a front view showing the intake / exhaust holes 2 and 3 provided in the housing of the electronic device, and FIG. 3 (c) is It is a front view which shows the case where the opening / closing plate 8 is in a closed state.

In FIG. 3, the shape memory coil spring 5 has a property that its plasticity changes when reaching a certain temperature. Then, the elastic force of the shape memory coil spring 5 is reduced when the outside air is higher than a predetermined temperature (the temperature at which ventilation of the electronic device is required), and when the outside air is lower than the predetermined temperature, the shape memory coil spring is It is preset so that the elastic force of No. 5 increases and returns to the plasticity at the time of shipment.

That is, as shown in FIG. 3A, when the outside air has a temperature higher than a predetermined temperature, the elastic force of the shape memory coil spring 5a decreases due to its plastic change and is pressed by the bias spring 6a. Therefore, the shaft 7 and the opening / closing plate 8 fixed to one end of the shaft 7 are pushed and moved, so that the square hole 11 of the opening / closing plate 8 and the intake / exhaust holes 2 and 3 shown in FIG. The housing 1 is ventilated.

Contrary to the above operation, when the outside air temperature is lower than the predetermined temperature, as shown in FIG. 3C, the shape memory coil spring 5b increases in elastic force due to plastic change and pushes the bias spring 6b. Therefore, the shaft 7 and the opening / closing plate 8 fixed to one end of the shaft 7 are pulled and moved, so that the blocking portion 12 of the opening / closing plate 8 and the intake / exhaust holes 2 and 3 shown in FIG. Together, it makes ventilation of the housing 1 impossible.

[0016]

[Effect of device]

 As described in detail above, according to the present invention, by engaging the shape memory coil spring whose plasticity changes with constant temperature and the opening / closing plate, the opening / closing work of the ventilation hole according to the change of the outside air temperature is automated. Therefore, it is not necessary for the operator to open and close the ventilation holes. Therefore, it is possible to reduce the risk of malfunction of the electronic device, which is caused by the operator erroneously opening / closing the ventilation hole or delaying the opening / closing work due to a sudden change in weather.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a ventilation hole opening / closing mechanism of an electronic device according to the present invention.

FIG. 2 is a perspective view showing an embodiment of an electronic device using the ventilation hole opening / closing mechanism of FIG.

3 is a front view for explaining the operation of the ventilation hole opening / closing mechanism of FIG. 1. FIG.

FIG. 4 is a perspective view showing a ventilation hole opening / closing mechanism of a conventional electronic device.

[Explanation of symbols]

 1 Housing 2 Intake Hole 3 Exhaust Hole 4 Opening 5 Shape Memory Coil Spring 6 Bias Spring 7 Axis 8 Open / Close Plate 11 Square Hole 12 Blocking Section

Claims (1)

[Scope of utility model registration request] 1. A ventilation hole opening / closing mechanism of an electronic device for opening / closing a ventilation hole provided in a casing of an electronic device, wherein the outside air temperature around the electronic device is constantly in contact with the outside air temperature at which ventilation is required. A shape memory coil spring that changes in plasticity at a predetermined temperature, a bias spring that interlocks with the shape memory coil spring and does not plastically change itself due to temperature change, a shaft that holds the shape memory coil spring and the bias spring, and the shaft. And an opening / closing plate fixed to one end of the opening / closing plate having a hole facing the ventilation hole provided in the housing, and the opening / closing plate and the hole provided in the opening / closing plate are moved by the plastic change of the shape memory coil spring. A ventilation hole opening / closing mechanism for an electronic device, wherein the ventilation hole provided in the housing is opened / closed.