JPS6328840Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a safety device that stops the operation of electrical equipment when it falls over or when the lid is opened.

Conventionally, the switch that opens when the vehicle falls and the switch that is linked to the lid were considered to be separate. For this reason, devices that require both types of safety measures must have their own switches;
The disadvantage was that the number of parts, such as the levers that operate each switch, increased, resulting in higher costs.

This invention reduces the number of parts and provides an inexpensive safety device by using one switch to operate both in the event of a fall and in opening and closing the lid.

This invention will be explained below with reference to drawings that embody it as an electric hot air/cool air fan. The outer box of the electric hot air/cold air machine includes a box frame 1 that forms the top, bottom, and both left and right sides;
It consists of a front frame 2 at the front and upper and lower rear plates 3 and 4 at the rear. The front frame 2 has a cold air outlet 5 at the upper part and a hot air outlet 6 at the lower part, and the cold air outlet 5 is provided with a vertical air direction changing louver 23 therein and a left and right air direction changing louver 24 at the rear.

8 is a cross-flow type fan, and 9 is a fan guide for the fan. Reference numeral 10 denotes a partition plate installed at intervals inside the front frame 2, and forms a ventilation passage 11 between the partition plate 10 and the front frame 2. The ventilation passage 11 is connected to the cold air outlet 5 at the upper part, and is also connected to the outlet of the fan guide 9. Further, an electric heater 12 is built in at the lower part and connected to the hot air outlet 6. The electric heater 12 and the front frame 2 are separated by another partition plate 13.

A lid 14 is attached to cover the opening between the upper and lower rear plates 3 and 4, and has a large number of intake ports 15. A pair of left and right walls 16 project from the lid 14 into the outer box, and support rollers 17 and 18 on the upper and lower sides, respectively. 19
is a belt made of a porous filter, which is placed between rollers 17 and 18.

A tank 20 is installed at the lower part of the outer box 1 and stores water. The lower part of the belt 19 is located in this water.

Reference numeral 21 denotes a filter that covers the intake port 15 of the lid 14, and is held on the lid 14 by a holding frame 22 having a large number of through holes.

When the fan 8 is rotated, outside air is sucked through the filter 21 and the filter belt 19, and is blown out from the air outlet 5 according to the guidance of the louvers 23 and 24. At this time, when the roller 17 is rotated by a motor to drive the belt 19, the air is cooled by the heat of vaporization of the water contained in the belt 19, and cold air is emitted from the outlet 5.

When the left/right wind direction changing louver 24 is operated beyond the normal swing angle using an appropriate operating device (not shown) to hit the adjacent louver, that is, when it is closed, the air sent from the fan 8 descends through the ventilation passage 11. The air is then blown out from the lower air outlet 6. By energizing the heater 12, hot air is generated. Further, by stopping the belt 19, it is possible to select between simple hot air and humidified hot air.

Since the above-mentioned electric hot air and cold air blower is equipped with a heater, it is very dangerous if it falls over and the hot air outlet 6 is blocked, or if the heater breaks or shorts due to the shock of falling. Furthermore, if you forget to attach the belt 19 and the lid 14 that supports the filter 21, not only will you not be able to get cold air or humidification, but you will also inhale dust, which may ignite in the heater part or pollute the inside.
Undesirable.

In the figure, A is a safety device that eliminates these drawbacks. 25 is a cover fixed to the upper rear corner of the outer box 1; 26 is a horizontal shaft 2 inside the cover 25;
an actuating member swingably mounted around 7;
is a microswitch having a normally closed contact fixed to its operating member 26, and inserted into the power supply circuit of the device. A pendulum 29 is attached to the actuating member 26 so as to be able to swing around a shaft 30 parallel to the shaft 27, and has a weight 31 at the lower end and a cam 32 at the upper end which comes into contact with the push button of the micro switch 28. The operating member 26 is biased by a spring 33 so that its upper end falls toward the rear surface of the outer box 1, and the projection 35 of the lid 4 that has entered through the through hole 34 of the rear plate 3
However, the bent portion 26a of the actuating member 26 is pressed against the action of the spring 33.

If the electric hot air/cool air fan is placed horizontally,
A push button of the micro switch 28 is located in the central recess of the cam 32 of the pendulum 29, and closes its normally closed contact to enable operation of the device.

When the device is tilted as shown in Figure 4, the pendulum 29
While the switch 28 is kept hanging down by the action of the weight 31, the convex part of the cam 32 presses the push button of the micro switch 28, opening the normally closed contact and immediately stopping the operation of the device.

Further, when the lid 4 is removed as shown in FIG. 5, the actuating member 26 is tilted around the shaft 27 by the action of the spring 33, while the pendulum 29 is maintained in a hanging state, so that the convex portion of the cam 32 operates the micro switch 28. Press the push button to open the contact. Therefore, the equipment can no longer be operated.

If the device is returned to a horizontal position or the lid 4 is attached, the device can be operated again.

FIG. 6 shows another embodiment, in which the microswitch 28 and the pendulum 29 are directly supported by the cover 25. The actuating member 36 is swingably supported by the cover 25 by an axis 38 parallel to the axis 30 of the pendulum 29, and its lower end is connected to the weight 3 of the pendulum 29.
1 by a spring 37.

When the lid 14 is attached, the protrusion 35 of the lid 14
presses the actuating member 36, and the lower end of the actuating member 36 and the weight 31 of the pendulum 29 face each other with an interval. Therefore, the pendulum 29 is free, allowing safe operation in accordance with the tilting of the device as described above.

When the lid 14 is opened, the actuating member 36 swings the pendulum 29 due to the action of the spring 37, as shown by the two-dot chain line.
Press to open the contact of the micro switch 28.

As described above, according to this invention, the switch is opened by the relative movement between the switch and the pendulum as the device is tilted, and the switch and the pendulum are moved relative to each other by the operation of the operating member as the lid is opened, and the switch is opened. Since it is designed to open, a single switch can achieve both safety functions in the event of a fall and opening/closing the lid, and has the effect of reducing the number of parts and manufacturing at low cost.

In addition, this idea is not only an electric hot air/cold air fan.
Can be widely used in electric heaters, clothes dryers, etc.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of this idea as an electric hot-air/cold-air fan, Figure 2 is an enlarged view of the safety device,
3 is a rear view of FIG. 2 with the lid removed, FIGS. 4 and 5 are explanatory diagrams of the operation of the safety device, and FIG. 6 is a diagram equivalent to FIG. 2 showing another embodiment. 14... Lid, 26... Operating member, 29... Pendulum, 31... Weight, 38... Switch.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A switch inserted into the power supply circuit is provided in the outer box of a device with an openable/closable lid, and a pendulum with one end linked to the switch and a weight at the other end can be swung. An operating member is provided in conjunction with the opening/closing of the lid to allow the switch and the pendulum to move relative to each other. A safety device for electrical equipment characterized by opening a switch by moving a switch and a pendulum relative to each other by operating an associated operating member. 2. The operating member supports the switch and the pendulum and is swingable about an axis parallel to the swing axis of the pendulum, and when the lid is closed, the pendulum is held in a state in which the switch is closed, and when the lid is opened, the pendulum is held in a state in which the switch is closed. The safety device for electrical equipment according to claim 1, which is sometimes tilted around the axis so as to move the switch and the pendulum relative to each other. 3. The operating member is movable in the same direction as the swinging direction of the pendulum, faces the pendulum at a distance when the lid is closed, and presses the pendulum to open the switch when the lid is opened. Safety devices for electrical equipment as described in Section.