JPH02302543A - Ventilation fan - Google Patents

Abstract

PURPOSE:To make vanes stop automatically even if it should be forgotten that a power supply switch is turned OFF, when a grill is removed for cleaning from a cover, and thereby to prevent fingers from coming into contact with rotating vanes and being injured thereby, by providing a switch which is put in a closed state only when the grill is fitted to the cover. CONSTITUTION:A cover 6 is provided with a switch 8 which is put in a closed state only when a grill 7 is fitted to a cover 6. When the grill 7 is removed from the cover 6 on the occasion of cleaning up dust deposited inside the grill 7, the switch 8 provided for the cover 6 is put in the closed state simultaneously. Even if it should be forgotten that a power supply switch 9 is turned OFF, accordingly, vanes 4 stop automatically and it is prevented without fail that fingers come into contact with the vanes 4 rotating and are injured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a ventilation fan used in rooms of ordinary households.

BACKGROUND OF THE INVENTION Conventionally, this type of ventilation fan has generally been constructed as shown in FIGS. 3 and 4, although no specific literature can be cited. That is, a motor 102 is horizontally supported by a support arm 103 in a frame 101 that is inserted and attached to an opening in a vertical wall 100, and blades 104 for sending air outside are fixed to the motor 102. A shutter 106 that closes when the ventilation fan is stopped is provided at the exhaust side opening of the frame 101, and a cover 106 having a fan guide portion is provided on the intake side of the frame 101. And cover 106
A grill 107 was provided on the front side.

Problems to be Solved by the Invention In such a conventional configuration, when cleaning the dust accumulated inside the grill 107, the grill 107 is removed from the cover 106, but in the unlikely event that you forget to turn off the power and the blade 104 is rotating. , a finger may come into contact with the blade 104 and be injured.

The present invention is intended to solve these problems, and aims to reliably prevent fingers from coming into contact with the rotating blades and causing injury.

Means for Solving the Problem In order to solve this problem, the present invention is provided with a switch that is closed only when the grill is attached to the cover.

With this configuration, when cleaning the dust that has accumulated inside the grill, the grill is removed from the cover, but at the same time the switch provided on the cover is in the open state, so even if you forget to turn off the power, the blades will automatically turn off. will be stopped.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 denotes a frame body that is inserted into an opening in a vertical wall 1Q and installed, and houses a motor 3 horizontally supported by a support arm 2 and a blade 4 fixed to the motor 3, and has an opening on the exhaust side. A cover 6 is provided which has a shutter 6 at the opening and a fan guide at the intake side opening. cover 6
A grill 7 is provided on the front side. The cover 6 is provided with a switch 8 that is closed only when the grill 7 is attached to the cover 6.

In the above configuration, when cleaning the dust accumulated inside the grill 7, the grill 7 is removed from the cover 6, but at the same time the switch 8 provided on the cover 6 is opened, so that even if you forget to turn off the power switch 9, the grill 7 is removed from the cover 6. , the blades 4 will automatically stop, and injuries caused by contact with the rotating blades 4 will be reliably prevented.

In addition, in the embodiment, the switch 8 was provided on the cover 6, but
The same effect can be obtained even if it is installed on another part such as a frame.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, dust accumulated inside the grill can be cleaned by providing a switch that is closed only when the grill is attached to the cover. Even if you forget to turn off the power switch when removing the grill from the cover to remove the grill, the blades will automatically stop, ensuring that your fingers do not come into contact with the rotating blades and get injured. You can get the effect that you can.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a ventilation fan according to an embodiment of the present invention;
The figure is a wiring diagram of the ventilation fan, FIG. 3 is a sectional view of a conventional ventilation fan, and FIG. 4 is a wiring diagram of the ventilation fan. 1...Frame body, 2...Support arm, 3.
...Motor, 4...Blade, 6...Cover, 7...Grill, 8...Switch. Name of agent: Patent attorney Shigetaka Awano 1 person 1-
Figure 1 of the bell
2-Mataq No Figure 2

Claims (1)

[Claims] A cover having a frame attached to an opening in a vertical wall, a motor supported by a support arm within the frame, a blade fixed to the motor, and a fan guide provided on the intake side of the frame. A ventilation fan comprising a grill provided on the front surface of the cover, and a switch that is closed only when the grill is attached to the cover.