JPH0131248B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is applicable to fire alarms and other types of emergency button devices that are normally covered with a cover, and when used in an emergency, the cover is destroyed and an internal communication button is pressed. This invention relates to a protection plate device for an emergency button.

This type of protection plate currently in use requires the protection plate itself to be destroyed in order to press the emergency button, or some models have adopted a model in which the protection plate falls into the case when used. . In the former case, it is extremely uneconomical to install a new protective plate when things return to normal after use, and in the latter case, there is no need to replenish a new protective plate, but it is necessary to disassemble the case and install a new protective plate. It is necessary to take out the fallen protective plate, reassemble the case, and reset the protective plate to a predetermined position, which has the disadvantage of being too time-consuming. Additionally, it is technically possible to incorporate a pressure detection device into the emergency button itself so that it does not operate below a certain pressure, but this would be difficult to put into practical use as the manufacturing cost would be extremely high.

The present invention was devised to eliminate these drawbacks of the conventional type, and when the protective plate of the emergency button, etc. receives pressure exceeding a certain value, it retreats, and the user is forced to push the emergency button, etc. together with the protective plate. The protective plate is characterized in that after use, the protective plate can be easily returned to the position before use if necessary.

To explain one embodiment with reference to the drawings, 1 is a case, 3 is a protection plate provided with a reset hole 2, one edge of which is supported inside the case 1, and its free end 3'
is in contact with the tip of the pressure detection rod 5. Reference numeral 4 denotes an emergency button installed in the case 1 close to the protection plate 3 along with the pressure detection rod 5. By pushing the button 4, a connected switch 4' can be operated. Therefore, the protective plate 3 has one edge supported inside the case 1, and its free end 3' supported by the pressure detection rod 5, thereby closing the opening 1' of the case 1 from the inside. Reference numeral 14 denotes a reset button for releasing the emergency button 4 from being fixed in the pressed position, and by pressing this, the reset switch 14' can be operated.

The protective plate 3 configured as described above is held as it is in normal times, and only when a pressure of a certain value or more is applied to the protective plate 3 in an emergency, the holding by the pressure detection rod 5 is released and the free end 3 is held as it is. The mechanism that allows the regression of ′ is as follows.

A fixing lever 9 and a release lever 10 are mounted on the frame 6 on which the switches 4' and 14' are mounted and fixed, and are pivoted so as to overlap each other by means of a coaxial shaft S. A spring 12 is tensioned between both levers 9 and 10, and the fixing lever 9 One end is engaged and fixed by a claw piece 8 under the action of a spring 7, and the above-mentioned claw piece 8 is moved against the action of the spring 7 on the release lever 10, and the fixing lever 9 is connected to the release lever 10 by moving the claw piece 8 against the action of the spring 7.
An edge 10' is provided for disengaging the mating member.
In the long hole 11 of the release lever 10 installed in this way,
A protrusion 5' of the pressure detection rod 5 is slidably inserted. Incidentally, 13 is the emergency button 4 and the pressure detection rod 5.
It is a leaf spring that connects the Further, 15 and 16 are both springs, and each has the role of returning the emergency button 4 and reset button 14 to their old positions.

The position shown in Figure 2 (in the normal position, the protective plate 3 is
As shown in the figure, both levers 9 and 10 are installed so that they can only be rotated in a clockwise direction around an axis S.
The spring 12, which is stretched between 0 and 0, is arranged so that its repulsion force can be adjusted in advance as desired.

Next, the operation and function will be explained. When the protection plate 3 of the device of the present invention set as described above is lightly pushed with a force below a predetermined pressure, the free end 3' of the protection plate 3 is pressed against the pressure detection rod. 5, but the release lever 10 cannot be rotated clockwise through the elongated hole 11 into which the projection 5' of the rod 5 is inserted. The reason for this is that the spring 12 stretched between the fixed lever 9 and the release lever 10, which are fixed by the claw piece 8, cannot be compressed.

Next, when a strong pressure of more than a certain value is applied to the protection plate 3 and the free end 3' presses the tip of the pressure detection rod 5 to the extent that it can compress the spring 12, the force applied to the pressure detection rod 5 is The release lever 10 is rotated clockwise through the protrusion 5' and the elongated hole 11 while compressing the spring 12, and the edge 1
0' moves the claw piece 8 against the action of the spring 7 to release the fixed state of the fixed lever 9. As a result, both levers 9 and 10 become free and rapidly rotate clockwise around the shaft S, and the pressure detection rod 5
is allowed to advance. This allows the user to
At the same time, the emergency button 4 can be pushed in, and the pressed emergency button 4 is fixedly held in that position in order to actuate the switch 4'.

To restore everything to the previous state after use, press the reset button 14 with a separately prepared thin rod or the like through the reset hole 2 provided in the protection plate 3, and press the emergency button 4.
is released and returned to its old position by the spring 15, the pressure detection rod 5 connected to it by the leaf spring 13 also returns to its old position, which causes the locking lever 9 and release lever 10 to Since it is rotated counterclockwise about the shaft S, the claw piece 8 engages and fixes the fixing lever 9 when it comes to the corresponding position, and
The tip of the pressure detection rod 5 pushes back the free end 3' of the protection plate 3, and the whole mechanism automatically returns to its position before use.

In the explanation, the reset hole 2 is provided in the protection plate 3, but the position of the reset hole 2 is arbitrary.If the reset button 14 can be pressed from the outside when necessary, it can be bored in an appropriate location on the case 1. It's okay.

As described above, according to the present invention, it is possible to obtain a protective plate device at a low cost that can be restored extremely easily without disassembling the case after use.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the inside of the device of the present invention in normal times, Figure 2 is an explanatory diagram of the inside of the device of the present invention in emergency situations, and Figures 3 and 4 are respectively
FIG. 3 is a side view of the engine section in the state shown in FIGS. 1...Case, 1'...Case opening, 2...
Reset hole, 3...Protection plate, 3'...Free end of protection plate, 4...Emergency button, 4'...Switch, 5
...Pressure detection rod, 5'...Protrusion, 6...Frame,
7...Spring, 8...Claw piece, 9...Fixing lever, 10...Release lever, 10'...Edge, 11
... Long hole, 12 ... Spring, 13 ... Leaf spring, 14 ... Reset button, 15, 16 ... Spring.

Claims (1)

[Claims] 1 The free end 3' of the protection plate 3 supported at one edge by the case 1 is intended to be able to press the emergency button 4 and the pressure detection rod 5, and is rotatably pivoted to the frame 6, and one end is supported by the spring 7. an edge 1 which is rotatably pivoted to the frame 6 on the same axis S as a fixed lever 9 which is stopped by a claw 8 under its action, and which allows said claw 8 to move against the action of a spring 7;
The protrusion 5' of the pressure detection rod 5 is slidably inserted into the elongated hole 11 of the release lever 10 having a diameter of 0', and a spring 12 is stretched between the levers 9 and 10. Emergency button 4 with leaf spring 1
3, and a reset hole 2 is provided to allow pressing of a reset button 14 for returning the emergency button 4 to an appropriate location on the protection plate 3 or case 1.