JP2023092913A - transmitter - Google Patents

Abstract

To provide a transmitter which eliminates the risk that an erroneous report is issued even if a part of a body of a passer-by or baggage erroneously hits a protection plate.SOLUTION: The present invention relates to a transmitter comprising: a storage case (housing) 23 incorporating a push-button switch and including a recess (recessed storage part) 21 at a front side of the push-button switch; and a protection plate 10 which can be stored in the storage part, includes a head with a front face in a flat plate shape and covers the front side of the push-button switch. The protection plate includes, on a rear face of the head, a cylindrical moving guide 11 protruding toward the storage part in a direction orthogonal with the front face of the head. The storage part includes a leading guide 24A which leads the head in an action direction of the push-button switch and can be fitted to the moving guide. A projection is provided on a fitting surface of the moving guide or the leading guide, or a groove or a slit to which the projection is engaged is provided in the moving guide or the leading guide. The groove or the slit includes a portion which is not parallel with a ridge line of an outer peripheral surface of the moving guide or the leading guide.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a transmitter having a built-in push-button switch, and more particularly, to a technology that is effective when used in a transmitter that is installed on the wall of a building and is operated when a fire breaks out to give an alarm.

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 incorporates the above-mentioned push button switch. , is installed so as to be embedded in the wall surface 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.

JP 2018-142051 A JP-A-04-85699 JP 2014-153993 A

In a conventional fire alarm transmitter, as shown in FIG. 8, a push button B disposed in the center of the front surface of the transmitter tilts around a fulcrum F provided at one end (lower end in the drawing). When the push button is pressed with a finger, the front surface of the push button tilts and the finger slips, and the fingertip enters the gap in the opening of the front panel, causing discomfort. was likely to give In addition, the conventional transmitter has a problem of poor operability due to the small diameter of the push button.

Therefore, we thought about increasing the diameter of the push button, but in the case of the tilting type push button shown in FIG. In addition, it was found that if the amount of movement to turn on the switch is increased, it becomes easier for the fingertip to slip into the gap in the opening of the front panel. As a transmitter having a configuration as shown in FIG. 8, there is one described in Patent Document 1, for example.
On the other hand, as a configuration for avoiding the finger slipping on the front surface of the push button of the transmitter, for example, as described in Patent Documents 2 and 3, the push button (press protection plate) is moved in parallel when the finger is pressed. A configuration is conceivable.

However, in the transmitters described in Patent Documents 2 and 3, in which the push button is pushed in parallel, the protective plate (push button) is required to increase the presence of the transmitter and improve operability. There is a problem that the concern of unintentional reports (false reports) increases when trying to increase the diameter of the sensor. Specifically, for example, a person walking in an aisle where a transmitter is installed loses balance and staggers near the transmitter, and a part of the body such as the shoulder or elbow hits the push button and pushes it, or pushes a large package. When a person carrying a bag passes another person on the other side, they change their posture and push the push button with the corner of the luggage, causing a false alarm. It gets higher.

The present invention has been made with a focus on the above-mentioned problems, and its object is to transmit information without the possibility of issuing a false alarm even if a part of a passerby's body or luggage accidentally hits a protective plate. to provide the machine.
Another object of the present application is to ensure that even if the diameter of the push button (protective plate) is increased in order to improve the operability of the push button type switch, the switch can be reliably turned on by stably moving in parallel without tilting when pressed. To provide a transmitter capable of

In order to solve the above problems, the present invention
a housing having a built-in push-button switch and a recessed storage portion in front of the push-button switch;
a protection plate that can be stored in the storage portion, has a flat plate shape, has a head that is pressed by an operator, and covers the front of the push button switch;
a transmitter comprising
The protection plate has a cylindrical movement guide on the back surface of the head portion that protrudes toward the storage portion in a direction orthogonal to the front surface of the head portion,
The storage section has a guidance guide that guides the head toward the actuating direction of the push button switch and can be fitted to the movement guide,
A projection is provided on the fitting surface of the moving guide or the guiding guide, and a groove or notch for engaging the projection is provided on the fitting surface of the guiding guide or the moving guide,
The groove or notch is formed so as to have a portion that is not parallel to the ridgeline of the outer peripheral surface of the movement guide or the guide guide.

According to the above configuration, the protective plate is moved by the fitting structure between the cylindrical movement guide on the back of the head and the induction guide on the housing side. Even if the diameter of the (push button) is increased, the protective plate does not incline when pressed and can be stably moved in parallel to turn on the switch. In addition, since the protrusions engage with the grooves or cuts formed so as to have a portion that is not parallel to the ridgeline of the outer peripheral surface of the guide and guide it, part of the pressing force is converted into torque and the protection plate rotates. Therefore, even if a part of a passerby's body or luggage accidentally hits the protective plate, it will be difficult for the protective plate to move to the back, and there is a risk that the switch will be turned on and an erroneous alarm will be issued. There is no

Here, it is preferable that the groove or the notch has a helical portion centered on the central axis of the moving guide or the guiding guide.
According to such a configuration, the helical portion of the grooves or cuts formed in the guide can efficiently convert part of the pressing force into torque.

Also, preferably, the groove or the notch is configured to have a portion orthogonal to the ridgeline of the outer peripheral surface of the movement guide or the guide guide.
According to such a configuration, it is possible to temporarily stop the pushing of the protective plate by a portion orthogonal to the ridge line of the groove or notch formed in the guide, and to turn it on by pushing it to the deep part and turning on the switch. Even if a part of a passerby's body or luggage hits the protective plate by mistake, the protective plate cannot move to the inner part, so that it is possible to reliably prevent the switch from being turned on and issuing an erroneous alarm.

Further, preferably, the surface of the head of the protective plate is formed with irregularities.
According to such a configuration, it is possible to prevent difficulty in rotation due to slippage of the palm or fingertips when rotating the protection plate while pressing it to turn on the switch.

Further, desirably, the outer diameter of one of the moving guide and the guiding guide is set smaller than the inner diameter of the other,
The projection is provided on the inner peripheral surface of one of the moving guide and the guide guide whose inner diameter is larger than the other, and the protrusion is provided on the outer peripheral surface of the moving guide or the guide guide whose outer diameter is smaller than the other inner diameter. Make sure there are grooves.
According to this configuration, grooves for guiding the protrusions are provided on the outer peripheral surface of the guide, which is smaller than the inner diameter, so that the grooves can be easily formed in the manufacturing process.

According to the present invention, even if a part of a passerby's body or a package accidentally hits a protective plate, there is no risk of issuing a false alarm. In addition, even if the diameter of the protective plate is increased to improve the operability of the push-button type switch, there is an effect that the switch can be reliably turned on by stably moving in parallel without tilting when pressed.

1 shows an embodiment when the present invention is applied to a fire alarm transmitter, (A) is an overall perspective view of the transmitter, and (B) is a partially exploded perspective view. FIG. 4 is an explanatory diagram showing movement guide operation in the transmitter of the embodiment; It is a cross-sectional side view showing the state before the protection plate is pushed in, and (B) is a cross-sectional side view showing the state after pushing in, showing the operation of the transmitter of the embodiment. (A) and (B) are side views showing modifications of the movement guide of the transmitter. FIG. 10 is a diagram showing an example of grooves or notches provided in the movement guide or induction guide of the transmitter of the embodiment; It is a perspective view which shows the relationship between the movement guide which has the groove|channel of the shape shown in FIG.5(C), and a guidance guide. FIG. 7 is an explanatory diagram showing the operation of the movement guide shown in FIG. 6; It is a cross-sectional side view which shows the specific example of the internal structure of the conventional transmitter for fire alarms.

An embodiment in which the present invention is applied to a fire alarm transmitter will be described below with reference to the drawings.
The fire alarm transmitter (hereinafter simply referred to as the transmitter) 10 of the present embodiment can be turned on by pressing the push button provided on the front surface strongly to turn on the internal switch when an abnormality such as a fire occurs. It has a function of transmitting a signal to notify the occurrence of an abnormality to a fire receiver, 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.

1 to 3 show the transmitter of the first embodiment. Among them, FIG. 1(A) is an overall perspective view of the transmitter, (B) is an exploded perspective view showing a state in which the protection plate is removed from the body side of the transmitter, FIG. 2 is an operation explanatory diagram, and FIG. 3 is the transmitter. is a cross-sectional side view showing the structure of the push button portion of.
The transmitter of the first embodiment, as shown in FIG. 1(A), comprises a disk-shaped protective plate 10 for protecting the push-button switch and a transmitter main body 20. The transmitter main body As shown in FIG. 1B, the portion 20 has a recess 21 for housing the protective plate 10 and a front panel portion 22 having an annular shape at the front.

The protective plate 10 has a diameter that is about 1/3 to 1/2 the diameter of the front panel portion 22 of the transmitter main body portion 20 . Further, the transmitter has a box-like storage case 23 containing a circuit board and the like, and the circuit board and the like are contained inside. 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). In the conventional general transmitter, the diameter of the push button is about 1/4 of the diameter of the front panel portion 22, and the diameter of the protective plate 10 corresponding to the push button of the transmitter of this embodiment is is set to be relatively large compared to the conventional one.

A cylindrical movement guide 11 is provided on the rear surface of the protective plate 10 so as to protrude rearward in a direction orthogonal to the front surface of the protective plate 10, that is, toward the bottom of the concave portion 21 of the transmitter main body 20. ing. Here, the "height" of the cylindrical movement guide 11 is set to be larger than the "inner diameter".
In addition, although there is one moving guide 11 of the protective plate 10 shown in FIG. may be formed. In that case, the heights of the two movement guides may be the same or different.

On the other hand, the transmitter main body 20 has an outer guiding guide 24A and an inner guiding guide 24B arranged in the center of the recess 21 on the front side so as to form a concentric double cylindrical shape at the center of the front surface. It is provided so as to protrude forward, that is, toward the rear surface of the protection plate 10 so as to be perpendicular to each other.
In addition, the inner diameter of the outer guiding guide 24A is set to be slightly larger than the outer diameter of the moving guide 11 on the rear surface of the protective plate 10, so that the guiding guide 24A and the moving guide 11 can be fitted to each other. It is

Furthermore, the movement guide 11 of the protection plate 10 has a straight line on the outer peripheral surface of the cylinder parallel to the central axis of the movement guide 11, such as a gentle S shape or a spiral shape, that is, a portion inclined with respect to the ridge line of the cylinder. A pair of notches (slits) 11a having a shape having a shape is formed, and a pair of cylindrical projections 25 that engage with the notches 11a and are relatively movable are formed on the inner peripheral surface of the outer guide 24A of the transmitter main body 20. is provided.
As a result, when the protective plate 10 is pushed backward from the front, the protective plate 10 and the moving guide 11 rotate and move as shown in FIGS. 2(A) to 2(C). Therefore, by converting part of the pushing force into torque, a resistance force is generated, making it difficult for the internal switch to turn on with a small pushing force. , the switch is not turned on, and it is possible to prevent false alarms from being issued.

Note that the notches 11a are not limited to slits penetrating from the inner peripheral surface to the outer peripheral surface, and may be grooves having a bottom, and may be provided with one or three or more instead of two. Alternatively, a notch or groove may be provided in the outer guiding guide 24A, and the cylindrical projection 25 may be provided on the outer peripheral surface of the moving guide 11. FIG. However, in the fitting structure shown in FIG. 1, if grooves are provided instead of cuts, it is more advantageous in terms of manufacturing to provide grooves on the outer peripheral surface of the guide.
In addition, when the notch 11a has a gentle S-shape as shown in FIG. 1, the repulsive force of the spring is set to be strong, and the protective plate 10 can easily be pushed in only by being hit by a part of the body or luggage. In addition, the surface of the protective plate 10 may be made smooth so that the palm and fingers can easily slide so that the rotation of the movement guide 11 is not hindered when the protective plate 10 is pushed.

Further, the protective plate 10 is made of a translucent material, and an LED (light-emitting element) is provided at the bottom of the concave portion 21 of the transmitter main body 20. When the LED is turned on, the light emitted from the protective plate 10 The light may be incident from the rear surface side and diffusely reflected inside, so that the entire surface of the protective plate 10 may be dimly illuminated. In addition, on the front surface of the protective plate 10, characters such as "push hard" or "push hard while rotating a little" may be printed.

Further, as shown in FIG. 3, a push-button switch 30 is arranged in the storage case 23 so that an actuator (knob) 31 protrudes inside the inner guide 24B.
In this embodiment, the actuator 31 has a length that does not protrude from the front end of the inner guide 24B, so that it is positioned inside the movement guide 11 on the rear surface of the protective plate 10 and at the opening of the inner guide 24B of the transmitter main body 20. A pressing protrusion 12 is provided for entering and contacting and pressing the actuator 31 of the push button switch.

Furthermore, in the transmitter of this embodiment, as shown in FIG. 3A, a coil spring 13 is fitted in the movement guide 11 and the guide guides 24A and 24B, and the protection plate 10 is attached to the body of the transmitter. 3(B), the coil spring 13 is compressed, and the tip of the pressing projection 12 at the center of the rear surface of the protection plate 10 is pushed into the recess 21 of the protection plate 10. As shown in FIG. The actuator (knob) 31 is contacted and pushed in to turn on the switch. When the pushing force to the protective plate 10 is released, the restoring force of the coil spring 13 causes the protective plate 10 to return to its original position.

Also, although not shown, a stopper mechanism is provided to keep the front surface of the protection plate 10 from protruding from the front surface of the transmitter main body 20 in a normal state and to form a flush surface. In such a stopper mechanism, for example, the moving guide 11 of the protective plate 10 is provided with a stopper piece that extends in the axial direction and is elastically deformable. This can be realized by providing an axial slit having a width slightly wider than the width of the stopper piece in the guide 24A, and engaging the claw of the stopper piece with the slit so as to be movable.

Alternatively, the notch 11a may not be formed to the end of the moving guide 11 on the opening side, but may be terminated in the middle, thereby restricting the moving range of the moving guide 11 and preventing it from coming off.
Alternatively, a brim portion is formed on the rear side of the peripheral edge of the protective plate 10, and an eaves portion is provided by protruding the edge portion of the front opening of the transmitter main body portion 20 inward, and the diameter of the opening is set to the above-described value of the protective plate 10. The diameter of the guard plate 10 is set to be smaller than the diameter of the guard plate 10 and slightly larger than the diameter of the projection (pressing part) on the front surface of the protection plate 10, so that the guard plate 10 is positioned at the edge of the front opening of the transmitter main body 20 ( The protection plate 10 may be prevented from protruding forward by being configured to abut on the back surface of the eaves.

As described above, in the transmitter of this embodiment, the protective plate 10 is provided with the movement guide 11, and the transmitter main body 20 is provided with the guidance guide 24A that engages with the movement guide 11. is pushed in, the front surface of the protection plate 10 moves in parallel without being inclined. Thus, even if a position deviated from the center is pressed by enlarging the diameter of the protection plate 10, the switch can be reliably turned on by parallel movement in a stable posture without tilting when pressed. In addition, since the protective plate 10 does not tilt, it is possible to prevent the finger from slipping and touching the edge of the opening of the transmitter main body 20 or entering a gap.
Further, the movement guide 11 is formed with a notch 11a inclined with respect to the ridgeline of the cylinder, and the inner peripheral surface of the outer guiding guide 24A is provided with a cylindrical projection 25 that can be engaged with the notch 11a. The switch is not turned on only when a part of a person's body or a load hits the protection plate 10, and it is possible to prevent an erroneous alarm from being issued.

(Modification)
4 and 5 show a variant of the transmitter of the invention.
Among them, FIG. 4 shows the notch 11a formed in the moving guide 11 in the shape of a crank, and FIG. 5 shows an example of another shape of the notch 11a.
When the moving guide 11 of the modified example of FIG. 4 is used, after the protective plate 10 is pushed halfway, it is rotated slightly clockwise, and then the protective plate 10 is pushed again to turn on the internal switch 30. can be made Therefore, the operation for turning it on is a little more troublesome compared to the transmitter of the above-described embodiment, but even if a passerby's body or a part of luggage accidentally hits the protection plate 10, the switch 30 will still be turned on. has the advantage of being able to reliably prevent

The notch 11a may have a crank shape with rounded corners as shown in FIG. 4(B) instead of the angular crank shape as shown in FIG. 4(A). By rounding the corners, it is possible to turn on the internal switch 30 even if the force applied in the direction of rotating the protection plate 10 when pushing in the protection plate 10 is smaller than that in FIG. 4(A). . Although not shown in FIG. 4, a notch 11b having the same shape as the notch 11a is provided on the opposite side of the movement guide 11, similarly to the one shown by the dashed line in FIG.

When the notch 11a is formed in a crank shape as shown in FIG. 4, in order to easily apply a force in the turning direction, the surface of the protective plate 10 is densely covered with shallow jagged irregularities or small square pyramids. It is preferable to form unevenness or the like to increase the frictional force. Further, on the front surface of the protection plate 10, the characters "push hard while rotating slightly" may be printed, or the characters "push hard" and an arrow indicating the direction of rotation may be printed. . Furthermore, the surface of the protective plate 10 may be provided with a projection like a dial knob of a gas stove.

The examples of the shape of the cutout 11a shown in FIGS. 5A to 5C are those in which the cutout 11a has a symmetrical shape so that the protection plate 10 can rotate in either clockwise or counterclockwise direction. is. If the force to push the protection plate 10 is applied to the center, the easiness of turning the protection plate 10 is about the same in both left and right directions, but in reality the force to push the protection plate 10 is applied to a position shifted from the center. In many cases, there is a difference in the ease of turning left and right. Therefore, by making the notch 11a symmetrical, the switch can be automatically rotated in an easy-to-turn direction, thereby reducing the pushing force required to turn on the switch.

5(A) to (C), FIG. 5(A) is a symmetrical cutout 11a shown in the embodiment of FIG. 1, and FIG. 5(B) is shown in FIG. The cut 11a is made symmetrical, and FIG. 5(C) shows a shape obtained by synthesizing the cut of (A) and the cut of (B) with some modifications.
Also, in FIG. 5(C), in order to prevent the projection 25 from being caught when the protection plate 10 is first pushed in, the entrance A of the central path is formed to spread in a V shape. In addition, tapers S1 and S2 are provided in the middle of the path so as to automatically return when pushing is stopped in the middle of rotation in the pushing process. In addition, in the case of the shape shown in FIG. 5(C), if a cut (slit) is formed, there will be a part that will fall off, so as shown in FIG. 6, it is necessary to form a groove 11b instead of a cut.

FIG. 7 shows the details of the operation of the movement guide 11 from the start of pressing of the protection plate 10 to the recovery when the groove having the shape shown in FIG. 5(C) is applied.
When the protective plate 10 is pushed in in the initial state shown in FIG. 7(A), as shown in FIG. 7(B), the protrusion on the guidance guide 24A side moves parallel to the axis and stops when it comes into contact with the step part in the middle of the path. At that timing, when the protection plate 10 is rotated as shown in FIG. 7(C), it becomes possible to move parallel to the axis again. Then, when the protection plate 10 is further pushed in, the projection on the side of the guide 24A moves parallel to the axis to reach a position where the switch is turned on as shown in FIG. 7(D), and an alarm is issued.

Thereafter, when the palm or fingers are released from the protective plate 10, the restoring force of the internal spring moves the protective plate 10 in the opposite direction as shown in FIGS. 7(E) and 7(F) to restore the original state. When the protective plate 10 is restored, as shown in FIG. 7(E), the protrusions pass through a gently curved groove so that they can be returned to their original positions without stopping or getting caught in the middle. can return.
The shape of the notch 11a or groove is not limited to those shown in FIGS. Any shape may be used as long as it has a portion that is not parallel to the parallel straight lines of the outer peripheral surface of the cylinder, that is, the ridgeline of the cylinder.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments. For example, in the above-described embodiment, the actuator 31 of the push button switch 30 is arranged inside the guide 24A, and the pressing protrusion 12 for operating it is provided inside the movement guide 11. The pressing protrusions 12 may be arranged outside the guiding guide 24A and the moving guide 11, respectively.
In the above-described embodiment, the protection plate 10 is configured to return to its original position when the force pushing the protection plate 10 is released. may be provided.

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.

10 protection plate (push button)
REFERENCE SIGNS LIST 11 movement guide 11a notch 12 pressing protrusion 13 compression coil spring 20 transmitter body 21 recess 22 front panel 23 storage case (housing)
24A, 24B Induction guide 25 Cylindrical projection 30 Push button type switch 31 Actuator (knob)

Claims (5)

a housing having a built-in push-button switch and a recessed storage portion in front of the push-button switch;
a protection plate that can be stored in the storage portion, has a flat plate shape, has a head that is pressed by an operator, and covers the front of the push button switch;
a transmitter comprising
The protection plate has a cylindrical movement guide on the back surface of the head portion that protrudes toward the storage portion in a direction orthogonal to the front surface of the head portion,
The storage section has a guidance guide that guides the head toward the actuating direction of the push button switch and can be fitted to the movement guide,
A projection is provided on the fitting surface of the movement guide or the guide guide, and a groove or notch for engaging the projection is provided on the guide guide or the movement guide,
The transmitter, wherein the groove or the notch is formed so as to have a portion that is not parallel to the ridgeline of the outer peripheral surface of the movement guide or the induction guide. 2. The transmitter according to claim 1, wherein said groove or notch has a spiral portion centered on the central axis of said moving guide or said guiding guide. 3. The transmitter according to claim 1, wherein said groove or notch has a portion orthogonal to a ridgeline of the outer peripheral surface of said moving guide or said guiding guide. 4. The transmitter according to claim 3, wherein the surface of the head portion of the protective plate is uneven. The outer diameter of one of the moving guide and the guiding guide is set smaller than the inner diameter of the other,
The projection is provided on the inner peripheral surface of one of the moving guide and the guide guide whose inner diameter is larger than the other, and the protrusion is provided on the outer peripheral surface of the moving guide or the guide guide whose outer diameter is smaller than the other inner diameter. 2. Transmitter according to claim 1, characterized in that it is provided with grooves.

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