JPH0112758Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small push button type circuit breaker used in place of a fuse in various electronic circuit devices.

Since the above-mentioned small push-button circuit breaker is made for indoor use, the following problems arise when it is attached to equipment used outdoors.

a Water, dust, etc. may enter the breaker body through the gap around the circuit breaker push button, causing a malfunction of the circuit breaker.

b This type of breaker determines whether it is on or off based on the length of the push button that protrudes from the surface of the breaker body, but since the stroke is short, it is difficult to tell at a glance outdoors.

c The push button is small and thin, so there is a risk of damage if handled roughly.

In view of the above points, the present invention aims to provide a circuit breaker that has a push button protection function and an on/off discrimination function so that the conventional small push button type circuit breaker can be installed in equipment used outdoors. purpose.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 1 designates a side wall of the device, on the back of which a push button type circuit breaker 2 is attached, and a push button 3 faces the center of a window 4 of the side wall 1.

A fixed sheath 5 is fitted around the outer periphery of the push button 3 and surrounds the push button 3 so as to be movable forward and backward. Further, a projecting portion 51 is integrally formed at the base of the fixed sheath 5, and the circuit breaker 2 is connected to the projecting base 51.
It covers the push button protruding surface 21 of.

An inward box portion 52 and an outward box portion 53 having the overhanging base portion 51 as a common bottom surface are provided integrally with the fixed sheath 5. The inward box portion 52 holds the circuit breaker 2, and the outward The circuit breaker 2 is positioned and fixed by fitting the box part 53 into the inner periphery of the window 4 of the side wall 1.

The length of the fixed sheath 5 is such that when the circuit breaker 2 is in the closed state, almost the entire length of the push button 3 is contained within the fixed sheath 5, and when the circuit breaker 2 is in the open state, the head of the push button 3 is within the fixed sheath. It is set to protrude from the tip of 5.

The tip of the fixed sheath 5 and the head of the push button 3 are covered with a cup-shaped transparent cover 6 so as to be visible from the outside.

Then, between the transparent cover 6 and the protruding base of the fixed sheath 5, the transparent cover 6 is constantly pushed outward and the flange (protruding part) 61 of the base of the transparent cover 6 is inserted into the window 4.
By providing a cover pushing spring 7 that urges the cover to be brought into close contact with the inside of the opening edge of the transparent cover 6, a space S is created between the bottom of the transparent cover 6 and the tip of the fixed sheath 5 to allow the push button 3 to protrude. I'm keeping it. The cover push-out spring 7 uses a compression coil spring.

FIG. 1 shows when the circuit is normal (circuit breaker 2 is closed), and the head of the push button 3 and the tip of the fixed sheath 5 are aligned. In addition, in a bimetal inverted type circuit breaker, the head of the push button 3 is attached to the fixed sheath 5.
In some cases, it may retract inward from the tip.

FIG. 2 shows a state where an abnormality has occurred in the circuit (the circuit breaker 2 is open), and the head of the push button protrudes outside the fixed sheath 5 as indicated by the reference numeral 3'.

Figure 3 shows the circuit reset (circuit breaker 2
When the transparent cover 6 is pushed with a finger in the direction of the arrow against the spring 7 in the open to closed state, the push button 3 is pushed and the circuit returns to normal.

FIG. 4 shows another embodiment of the present invention, in which a circuit breaker 2 is supported and fixed to an internal machine frame 8. The transparent cover 6 in the example shown in FIG. 1 is slidably guided on the outer peripheral surface of the fixed sheath 5, but in the example shown in FIG. Guided by sliding. and transparent cover 6
The shoulder (overhanging portion) 62 of the base thereof rests against a presser ring 9 fitted into the opening of the outward cylindrical portion 54. The operation is similar to that of the example shown in FIG.

Since the circuit breaker of the present invention has the above-mentioned configuration, the circuit breaker 2 attached to the device has its front surface (the side on which the push button protrudes) doubly covered by the transparent cover 6 and the fixed sheath 5. , furthermore,
The projecting base 51 of the fixed sheath 5 is biased by the cover extrusion spring 7 so that the projecting base 61 of the transparent cover 6 is always in close contact with the inside of the attached part.
Since the pushbutton protruding surface 21 of the circuit breaker 2 is covered with this, water and dust hardly enter into the circuit breaker 2.

If there is a risk of water entering through the gap between the transparent cover 6 and the side wall 1 (the retaining ring 9 in the example in Figure 4) depending on the installation location of the circuit breaker or the usage environment, prevent water from entering the protruding base 51 of the fixed sheath 5. A punch hole 10 can be provided, and water that has entered the inside of the transparent cover 6 is drained from the hole 10, preventing water from entering the circuit breaker 2.

By making the transparent cover 6 thicker, the push button 3 of the circuit breaker 2 can be protected, and the operation surface (finger contact surface) at the time of reset can be enlarged and the operation stroke can be extended, thereby improving reset operability. will improve.

The transparent cover 6 protrudes from the side wall of the device 1, and the protruding base 61 of the cover 6 is kept in close contact with the inside of the attached part at all times to maintain waterproof and dustproof properties. You can check whether the head of the push button 3 is aligned with the tip of the fixed sheath 5.
Or, if it is retracted, it is known that the circuit breaker 2 is on, and if the head of the push button 3 protrudes from the tip of the fixed sheath 5, it is known that the circuit breaker 2 is off. That is, the fixed sheath 5 is the push button 3.
It serves as a guide to the appearance of the light, and has the effect of making it easier to determine whether it is on or off. Note that if the push button 3 and the fixed sheath 5 are made to have different brightness, shading, etc. of color, the above-mentioned ON/OFF discrimination can be visually observed more clearly.

[Brief explanation of drawings]

Figure 1 is a vertical side view of the circuit breaker according to the present invention, Figure 2 is the same diagram when the circuit breaker is open, Figure 3 is the same diagram when the circuit breaker is reset, and Figure 4 is the diagram showing the circuit breaker according to the present invention. FIG. 1 is the side wall of the equipment, 2 is the circuit breaker, 2
1 is a push button protruding surface, 3 is a push button, 4 is a window, 5
is a fixed sheath, 51 is an overhanging base, 6 is a transparent cover,
61 is a collar, and 7 is a cover extrusion spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A fixed sheath is provided around the outer periphery of the push button of the circuit breaker to surround the push button so that the push button can move forward and backward. Covers the protruding surface of the button, and adjusts the length of the fixed sheath such that when the circuit breaker is in the closed state, almost the entire length of the push button is contained within the fixed sheath, and when the circuit breaker is in the open state, the head of the push button is within the fixed sheath. A cup-shaped transparent cover is set to protrude from the tip of the fixing sheath and covers the tip of the fixed sheath and the head of the push button so as to be visible from the outside, and between the transparent cover and the protruding base of the fixing sheath, A cover pushing spring is provided that constantly pushes the transparent cover outward and urges the protruding base of the transparent cover to come into close contact with the inside of the attached part, and the transparent cover is pushed against the cover pushing spring. A push button type circuit breaker characterized in that the breaker can be set by pushing the push button into a fixed sheath.