JP2023095405A - Protection plate for push button type switch and transmitter for fire alarm comprising the protection plate - Google Patents

Abstract

To provide a transmitter for fire notification that is capable of providing a reliable notification in the event of a fire while preventing an erroneous notification, and a protection plate for the same.SOLUTION: A protection plate is provided with a knob part which is shaped so as to project to a front side. Then, a transmitter for fire notification using the protection plate has an auxiliary elastic member disposed around the knob part, such that when a reporter reaches out his hand, a surface of the auxiliary elastic member deforms and the knob part floats relatively. Thus, the reporter can reliably report a fire by pinching the knob part while easily rotating and pressing the protection plate. Alternatively, an auxiliary plate is provided around a tip of the knob part and a double layer of springs having different spring coefficients is provided inside. This causes the auxiliary plate to be displaced first and then the knob part to relatively float, so the reporter can reliably report a fire by pinching the knob part and easily rotate and press the protection plate.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a protective plate for a push-button switch, and is an effective technique for use in, for example, a push-button of a fire alarm transmitter that is provided on the wall of a building and is operated to issue an alarm when a fire breaks out. Regarding.
The present invention also relates to a fire alarm transmitter using the protective plate.

A fire alarm system is installed inside the building to notify the occurrence of a fire. The fire alarm system consists of a manual fire alarm transmitter equipped with a fire detector and push-button switch, a receiver, a fire alarm bell, an indicator light, etc. Of these, the fire alarm transmitter is It is installed at an appropriate height on the wall surface of the building corridor, etc. In the event of a fire, the finder presses the push button of the fire alarm transmitter to turn on the internal switch, which transmits a fire alarm signal to the receiver and a bell installed near the transmitter. An alarm sound can be emitted from the fire alarm to notify people in the vicinity of the occurrence of a fire.

Conventional fire alarm transmitters generally have a disk-shaped front panel that covers the exposed part of the room on the front of the transmitter body, and the transmitter body is equipped with the push button switch. It is installed so as to be embedded in the wall of the building. In addition, a cannonball-shaped indicator light was provided near the fire alarm transmitter so that it could be easily detected from a distance or even in the dark.
Examples of inventions related to fire alarm transmitters having the functions described above include Patent Document 1
and 2 are described.

JP 2018-142051 A JP-A-04-85699

In the conventional fire alarm transmitter, as disclosed in Patent Document 1 or Patent Document 2, the protective plate that covers the push button is pushed in with a finger, so the transmitter is arranged, for example. When a person walking in an aisle loses balance near a transmitter and staggers, and a part of the body such as the shoulder or elbow hits the protective plate and pushes it, or when a person carrying a large luggage passes another person on the other side, the posture should be adjusted. It was not possible to deny the possibility that a false alarm could be issued by pushing the protective plate with the corner of the luggage when the time signature is changed.
In response to this, by requesting that the protective plate be rotated with the palm or fingertips when reporting, part of the pushing force is converted into torque, and even if a linear pushing force is input, the device can be pushed to the end. If you make it harder, you can solve it. However, since the surface of the conventional protective plate is generally smooth, there is a problem that the palm and fingertips slip, and a distraught discoverer at the time of a fire outbreak cannot turn it properly.

Furthermore, in order to psychologically induce the rotation operation, it is conceivable to use a shape that simulates the dial knob commonly used in home gas stoves, etc., but the protective plate for the fire alarm transmitter is Even in the normal state, it is not desirable from the viewpoint of psychological acceptability that the shape resembles a dial knob.

The present invention has been made in view of the above-mentioned problems, and its purpose is to prevent false alarms, and at the same time to reliably rotate the protective plate in the event of a fire to make it possible to report, a push button switch type. To provide a protective plate suitable for a fire alarm transmitter.
Further, the present invention provides a fire alarm transmitter which has such a protection plate, has a shape that looks like a flat surface in a normal state, and can reliably rotate the protection plate when a fire breaks out to make a report. for the purpose.

In order to solve the above-mentioned problems, the present invention provides a push-button type switch that can be stored in the storage part of a housing that has a recessed storage part in front of the push-button switch, and is pressed by an operator. A push-button switch protection plate having a head that covers the front of the push-button switch, wherein the head is configured to have a knob portion that protrudes from the front side of the housing. It is what I did.
According to the above configuration, a reporter who discovers a fire can reliably rotate the protection plate by pinching the protruding knob on the front side of the head of the protection plate.

Further, another invention of the present application has the protective plate described above, and an auxiliary elastic member including an auxiliary surface that is pressed and deformed in accordance with a pressing operation is arranged around the knob portion.
According to the above configuration, while avoiding the conspicuousness of the knob on the front surface of the fire alarm transmitter in a normal state, the auxiliary elastic member is pressed and deformed when the whistleblower stretches out his/her hand to make a depressing motion when a fire breaks out. , the knob portion is lifted relatively, and the knob portion can be reliably pinched to make a report.

Further, another invention of the present application has the above-described protection plate, and an auxiliary plate including an auxiliary surface that is displaced in the direction of depression in accordance with a depression operation is arranged around the tip of the knob portion, and the auxiliary plate A first spring is provided between the rear surface of the plate and the front surface of the head, and a second spring having a spring coefficient larger than that of the first spring is provided between the rear surface of the head and the housing. It is configured as follows.
According to the above configuration, while avoiding the conspicuousness of the knob portion on the front surface of the fire alarm transmitter in a normal state, when the caller reaches out and presses down to make a report when a fire breaks out, the auxiliary plate is displaced in the direction of pressing down. As a result, the grip portion is lifted relatively, and the grip portion can be reliably pinched to make a report.

Here, preferably, of the front panel of the housing, the auxiliary surface, and the tip of the knob, at least the auxiliary surface and the tip of the knob are flush with each other before the pressing operation is performed.
According to such a configuration, in a normal state, it has a shape that looks like a flat surface as in the conventional case, but when a fire occurs, it is possible to reliably pick up the knob and rotate the protective plate to make a report.

According to the present invention, it is possible to realize a fire alarm transmitter capable of reliably reporting when a fire occurs while preventing false alarms.

It is a figure which shows one Example of the protection plate and transmitter for fire alarms concerning this invention. It is a figure which shows an example of the protection plate and auxiliary|assistant elastic member which concern on 1st Embodiment. FIG. 5 is a diagram showing an example in which hollow silicon is used for the auxiliary elastic member according to the first embodiment; FIG. 7 is a diagram showing how the auxiliary elastic member is deformed when the auxiliary elastic member according to the first embodiment is used in the fire alarm transmitter; It is a figure which shows one example of the auxiliary plate based on 2nd Embodiment. It is the figure which showed a mode that an auxiliary plate displaces when the auxiliary plate which concerns on 2nd Embodiment is used for the transmitter for fire alarms.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the embodiment at the time of applying the protective plate which concerns on this invention, and the said protective plate to the transmitter for fire alarms is described.
In the fire alarm transmitter of this embodiment (hereinafter simply referred to as the transmitter), when an abnormality such as a fire occurs, the push button provided on the front is strongly pressed and rotated to turn on the internal switch. It has a function of transmitting a signal to notify the occurrence of an abnormality to a fire receiver when turned on, and is configured to be used by being installed on the wall of a building, the door of a fire hydrant box, or the like.
For this reason, the protective plate according to the present invention has a knob part with a shape protruding from the surface so as to facilitate rotation.

1 to 6 schematically show the transmitter of this embodiment. 1 is an overall view of the transmitter, FIGS. 2 to 4 are explanatory diagrams according to the first embodiment, and FIGS. 5 and 6 are explanatory diagrams according to the second embodiment.
As shown in FIG. 1, both the transmitter 10 of the first embodiment and the second embodiment protects the push-button type switch, and presses and rotates a protection plate 20 at the time of reporting, and a part of the protection plate 20 It is composed of a knob portion 21 , a predetermined member forming an auxiliary surface 25 around the tip of the knob portion 21 , and a storage case 11 .
Although the details will be described later, the predetermined member forming the auxiliary surface 25 is made of an elastic material in the first embodiment, and is made of a hard material similar to the protective plate in the second embodiment.

FIG. 1(a) shows the appearance of the transmitter 10 in a normal state. An auxiliary surface 25 and the tip of the knob portion 21 are visible on the front surface of the transmitter 10 . It should be noted that at least the auxiliary surface 25 and the tip of the knob portion 21 should be flush with each other so as not to cause problems such as catching the clothes of passers-by due to the formation of unevenness, and to improve the design. It is preferable to determine the dimensions of each part so that the Furthermore, it is even more preferable to align the front panel portion 12 of the transmitter 10 and make it flush.

FIG. 1(b) is an exploded perspective view of the transmitter 10 shown in FIG. 1(a), with certain members omitted and the protective plate 20 removed.
As shown in FIG. 1(b), the transmitter 10 has a recessed storage portion 13 for storing the protective plate 20 and a front panel portion 12 having an annular shape at the front.
The transmitter 10 includes a box-shaped or columnar storage case 11 containing a circuit board or the like, and the circuit board or the like is contained therein. The circuit board or the like includes a push button switch or a circuit that detects the ON state of the switch, generates a signal, and transmits the signal to a fire receiver (not shown).

On the rear surface of the protective plate 20, as shown in FIG. 1(b), a cylindrical movement guide 23 extends rearward in a direction orthogonal to the front surface of the protective plate 20, that is, toward the bottom of the housing portion 13 of the transmitter 10. provided to protrude.
On the other hand, in the center of the front surface of the housing portion 13 on the front side of the transmitter 10, a cylindrical guidance guide 14 protrudes forward, i. is provided.

The inner diameter of the guiding guide 14 is set to a size different from the outer diameter of the moving guide 23 on the rear surface of the protective plate 20 by the thickness of the guide. ing.
Further, the movement guide 23 is provided with a gap 24 as shown in FIG. 1(b). On the other hand, a protrusion 15 is provided on the inner wall of the guide 14 .

As indicated by the dotted line arrow in FIG. 1(b), the gap 24 and the projection 15 are engaged with each other, and the gap 24 has a crank shape that splits in two. This is based on the fact that, in most cases, when a passerby staggers and accidentally presses the protective plate with his/her shoulder, resulting in a false alarm, the pressing operation is terminated linearly and instantaneously. That is, although the protective plate is linearly pushed down halfway due to the meshing of the gap 24 and the projection 15, it cannot be further pushed down linearly in the middle. On the other hand, when a fire reporter makes a report, he or she intentionally rotates the protection plate clockwise or counterclockwise and then pushes it further in order to make the original correct report.

In FIG. 1, the head portion 22 of the protection plate 20 is drawn with a size that is assumed to be about 1/2 to 1/3 of the diameter of the front panel portion 12 of the transmitter 10, but this is for easy understanding. , and even if it is about 1/4 of the general size, there is no problem in carrying out the present invention.

A member including a protection plate and an auxiliary surface according to the first embodiment will be described with reference to FIG.
As shown in FIG. 2( a ), the protection plate 20 according to the present invention has a movement guide 23 on the back side of the head 22 , that is, on the side toward the storage unit 13 , and the front side of the head 22 , that is, by the whistleblower. It has a knob portion 21 on the side where it can be opened.

As shown in FIG. 2A, in the present embodiment, the knob portion 21 is attached to the head portion 22 in a substantially rectangular parallelepiped shape. The size may be appropriately determined in relation to the head 22, but as will be described later, it is considered preferable to use a human hand, especially the index finger and thumb, to pick it up. , and a thickness of 10 mm in the horizontal direction.
Alternatively, instead of the substantially rectangular parallelepiped, a cylindrical shape having unevenness on the side surface may be used.
Also, it is preferable that the knob portion 21 is made of the same material as the head portion 22 . A different material may be used, but it is required that the material and coloring be able to ensure visibility even in the event of a fire.

An auxiliary elastic member having an auxiliary surface 25 according to the first embodiment is shown in FIG. 2(b).
The auxiliary elastic member 30 is realized as a hollow cylinder made of low-resilience urethane or silicon, and has the property of being easily deformed in the pressing direction when the communicator stretches out his/her hand and presses down as usual.
The auxiliary elastic member 30 has a hole 31 having the same shape and size as the knob 21, and as shown in FIG.

When low-resilience urethane is used for the auxiliary elastic member 30, the shape shown in FIG. 2(b) can be realized as solid.
In the case of a hollow columnar shape using silicon, it may be realized as shown in FIG. FIG. 3(b) shows the end face of the one-dot chain line connecting AA' in FIG. 3(a).
Further, by aligning the thickness of the auxiliary elastic member 30 with the height of the knob portion 21 in the protruding direction, as shown in FIG. 1A, the surface of the transmitter can be flush.

FIG. 4 shows how the auxiliary elastic member 30 is deformed so that the knob 21 is lifted and the rotary motion is facilitated when the caller operates the transmitter according to the first embodiment to make a report in the event of a fire. It will be shown schematically.

FIG. 4(a) shows a vertical cross section of the transmitter according to the first embodiment as seen from the side, and a state in which the caller brings his hand 1 closer to make a report.
As shown in FIG. 4(a), a coil spring 16 and a push-button switch actuator 19 are inserted into the body of the transmitter 10. As shown in FIG.
Of course, before the caller touches the transmitter 10 with the hand 1, the auxiliary elastic member 30 is not particularly deformed.

FIG. 4(b) shows the situation immediately after the communicator starts pressing the transmitter 10 after touching the hand 1 to the transmitter 10 after FIG. 4(a).
When the pressing action is started, the auxiliary elastic member 30 deforms in the pressing direction. At this time, the auxiliary surface 25, which is the surface of the auxiliary elastic member 30, becomes a deformed auxiliary surface 32 that is partially recessed as indicated by the dotted line on the immediate side of the knob portion 21. As shown in FIG. Then, the knob portion 21 protrudes from the auxiliary surface 25A. Then, as shown in FIG. 4(b), the whistleblower can pinch the grip portion 21 between the index finger and the thumb, and further push the protection plate 20 by rotating it as described with reference to FIG. 1(b). becomes possible.
When the protective plate 20 is pushed in, the coil spring 16 is compressed, and the tip of the protrusion at the center of the rear surface of the protective plate 20 comes into contact with the actuator 19 of the push button type switch and pushes it in to turn on the switch. When the pressing force on the protection plate is released, the restoration force of the coil spring 16 and the rotation in the opposite direction return the protection plate 20 to its original position.

A member including a protection plate and an auxiliary surface according to the second embodiment will be described with reference to FIG.
FIG. 5(a) shows the shape of the auxiliary plate 40, which is a predetermined member including the auxiliary surface 25B.
The auxiliary plate 40 has the same disk shape as the head 22, and has a hole 41 of the same size as the knob portion 21, like the auxiliary elastic member 30 of the first embodiment. and the hole 41 are fitted without a gap.
The auxiliary plate 40 is made of the same material as the protective plate 20, and has a certain hardness or more. That is, it is made of a material that does not easily deform when pressed by a human hand.

FIG. 5B shows a state in which the auxiliary plate 40 and the protection plate 20 are integrated by inserting the knob portion 21 into the hole 41 as a state during operation. As can be seen from the figure, the auxiliary plate 40 is fixed near the tip of the knob portion 21, and a spring is inserted into the gap between the auxiliary plate 40 and the head portion 22 of the protective plate 20 as will be described later.

FIG. 6 shows how the auxiliary plate 40 is displaced when a caller operates the transmitter according to the second embodiment to make a report in the event of a fire. is shown schematically.
6, the transmitter according to the second embodiment includes a first spring 17 attached to the auxiliary plate 40 and the head portion 22 of the protection plate 20, and a head portion 22 of the protection plate 20 and the storage portion. A second spring 18 is provided between the bottom surface of 13 .

Here, the first spring 17 and the second spring 18 are not the same, but when the spring coefficients of both are compared, the relationship "(first spring coefficient)<(second spring coefficient)" is satisfied. It is preferable to select and use one as appropriate. That is, the first spring 17 is a weak spring that is easily contracted as the pressing action is performed, and the second spring 18 is a spring that is strong enough to contract when the pressure is stronger than when the pressing action is started.

6(b) and 6(c), it will be explained that the effect of the present invention is achieved by making the spring coefficients of the first spring 17 and the second spring 18 different.
As shown in FIG. 6(b), when the communicator starts pressing to make a report, the spring coefficient of the first spring 17 is smaller than the spring coefficient of the second spring 18, so that the knob 21 is easily contracted. come. On the other hand, since the second spring 18 does not easily contract, it maintains approximately the same length as in FIG.

In the state shown in FIG. 6(b), the communicator can hold the handle portion 21 between the index finger and the thumb, and can further push in the protection plate 20 by rotating it as described with reference to FIG. 1(b). It becomes possible.

When the protective plate 20 is pushed in, the second spring 18 is compressed, and the tip of the protrusion at the center of the rear surface of the protective plate 20 comes into contact with the actuator 19 of the push-button switch and pushes it in to turn on the switch. Then, when the pressing force on the protection plate is released, the protection plate 20 returns to its original position due to the restoring force of the first spring 17 and the second spring 18 and the rotation in the opposite direction.

As described above, the protective plate according to the present invention has a knob portion on its front surface, and a member including an auxiliary surface is arranged around the knob portion. While the front of the transmitter is flush with the front, the knob easily pops up in the event of a fire. You can make a notification by turning on.

In addition, on the front surface of the auxiliary elastic member 30 or the auxiliary plate 40, characters such as "push hard, rotate, and then push" may be printed. The tip of the grip portion 21 may also be printed.

In each embodiment, the protective plate 20 is made of a well-known material and needs to have a certain degree of hardness, but it may have a property of transmitting light.
That is, the protective plate 20 is made of a translucent material, and when an LED (light-emitting element) (not shown) disposed at the bottom of the housing portion 13 of the transmitter 10 is turned on, the light is emitted from the rear surface of the head 22. The light may be incident from the side and diffusely reflected inside, so that the entire surface of the knob portion 21 glows vaguely. Moreover, the translucent material forming the protection plate 20 may be a transparent material such as an acrylic resin mixed with light scattering particles.
Furthermore, if the auxiliary elastic member 30 in the first embodiment and the auxiliary plate 40 in the second embodiment are given a certain degree of light transmittance, the auxiliary surface 25 (see FIG. 1(a)) can also dimly glow. is also possible.

Furthermore, in the above embodiment, the present invention is applied to a fire alarm transmitter that constitutes a fire alarm system, but the present invention is not limited to a fire alarm transmitter, and can be applied to station platforms and railroad crossings. It can also be widely used as a transmitter for emergency stop of trains, an emergency stop button for escalators and other devices.

REFERENCE SIGNS LIST 10 Fire alarm transmitter 17 First spring 18 Second spring 20 Protective plate 21 Knob 22 Head 25A Auxiliary surface of auxiliary elastic member 30 Auxiliary elastic member 32 Deformed auxiliary surface 40 Auxiliary plate

Claims (4)

A push-button switch is housed in a housing having a recessed housing in front of the push-button switch, and has a head to be depressed by an operator. A protective plate for a push-button switch that covers the front of the switch,
The head is
A protective plate for a push-button switch, comprising: a knob portion protruding from the front side of the housing.
Having the protective plate according to claim 1,
A fire alarm transmitter, wherein an auxiliary elastic member including an auxiliary surface that is pressed and deformed in response to a pressing action is arranged around the knob.
Having the protective plate according to claim 1,
An auxiliary plate including an auxiliary surface that is displaced in the direction of the depression in response to the depression is arranged around the tip of the knob,
A first spring is provided between the rear surface of the auxiliary plate and the front surface of the head, and a second spring having a spring coefficient larger than that of the first spring is provided between the rear surface of the head and the storage section. A fire alarm transmitter characterized by comprising:
Claim 2, wherein at least the auxiliary surface and the tip of the knob among the front panel of the housing, the auxiliary surface, and the tip of the knob are flush with each other before the pressing operation is performed. Or the transmitter for fire alarms of 3.

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