JP2535394Y2 - Fire transmitter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire transmitter having a push button switch and a telephone jack.

[0002]

2. Description of the Related Art Conventionally, a fire transmitter that is installed on a wall or the like in a guard area and sends an alarm signal to a receiver by a push-button operation when a fire occurs to warn the user is provided with, for example, a circuit shown in FIG. I have. In FIG. 4, reference numeral 1 denotes a push button switch, which includes switch contacts 2a and 2b. The switch contact 2a is used for transmitting an alarm signal, and the switch contact 2b is used for lighting a confirmation lamp 3 using an LED. Note that a protective zener diode 4 is connected to the confirmation light 3 in parallel.

One end of the switch contact 2a is connected to a signal line terminal L via a current limiting resistor R1, and one end of the switch contact 2b is connected to a signal line terminal A via a confirmation lamp 3 and a resistor R2. Further, the other ends of the switch contacts 2a and 2b are connected to the same common-side signal line terminal C. On the other hand, a telephone jack 5 is provided in the transmitter circuit.
Is connected to a telephone line terminal T, and the other end is connected to a common-side telephone line terminal TC.

[0004]

By the way, when installing a fire transmitter and connecting a power / signal line and a telephone line to a receiver, as shown in FIG. The signal line terminal C and the common-side telephone line terminal TC are connected by a jumper wire 6, so that only the common line on the power / signal line side needs to be used without drawing a telephone line.

[0005] However, depending on the installation location of the fire transmitter, it is expected that noise mixed into the telephone line will increase. In such a case, as shown in FIG. 5, a common line is drawn for each of the power / signal line 7 and the telephone line 8 and connected to the common-side signal line terminal C and the telephone line terminal TC, and the jumper line 6 is disconnected. By making the common line independent, noise on the telephone line 8 is reduced.

However, in the conventional fire transmitter, the jumper wire 6 is provided on a printed circuit board on which the transmitter circuit is mounted. Therefore, when the jumper wire 6 is cut with a nipper or the like, the printed circuit board is not used. The back cover of the case behind the transmitter body in which the cable is housed must be removed and cut off, and there is a problem that the work of cutting the jumper wire becomes complicated. In addition, since the jumper wire 6 is provided inside the case, it is complicated to open the case back cover when checking whether the jumper wire has been cut or not.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a fire transmitter capable of easily cutting a jumper wire and confirming the presence or absence of the cut. .

[0008]

In order to achieve this object, the present invention is configured as follows. First, the present invention provides a pushbutton switch 1 that is turned on by a pressing operation to output an alarm signal,
At least one pair of signal line terminals connecting the switch contacts 2a and 2b of the pushbutton switch 1 to the power / signal line 7 from the receiver, a telephone jack 5, and a pair connecting the telephone jack 5 to a telephone line 8 from the receiver. And a jumper wire 6 connecting between a common terminal C of the signal line terminals and a common terminal TC of the telephone line terminals.

In the present invention, such a fire transmitter is characterized in that an intermediate portion of the jumper wire 6 is taken out of the case behind the main body in which the circuit board is stored and held. Furthermore, on the outside of the case from which the jumper wire 6 has been pulled out,
Protective block 23 to secure space for taking out jumper wire 6
To protect the jumper wire lead-out part.

[0010]

According to the fire transmitter of the present invention having such a configuration, the jumper wire 6 mounted on the printed circuit board for connecting the common terminal C on the power / signal line side and the common terminal TC on the telephone line side is provided. Since the intermediate portion is held in a state of being taken out of the case, it is easy to cut the jumper wire 6 with a nipper or the like, and it is also possible to easily check whether the jumper wire is cut or not.

[0011]

1 is an explanatory view showing a fire transmitter from the back as one embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a main body of the fire transmitter, and when the main body 10 is viewed from the front, FIG.
Has the structure shown in FIG. In FIG. 2, a front cover 11 is attached to a front portion of the main body 10, and the front cover 11 has a pressing hole 12 opened substantially in the center. A pressing protection plate 13 is disposed behind the pressing hole 12, and a push button switch is provided behind the pressing protection plate 13, as will be described later. On the surface of the pressing protection plate 13, a display "press strongly" for notifying the switch operation is drawn.

A display door 14 is provided on the top of the front cover 11 so as to be openable and closable. When the display door 14 is opened, a telephone plug insertion port is provided inside. On the display door 14, the operation "Call the telephone" is described when making a telephone call according to the name of the "fire alarm". Referring again to FIG. 1, a storage case 15 is integrally provided behind the main body 10, and a printed circuit board 16 on which a transmission circuit similar to that shown in FIG. 4 is mounted.

The internal structure of the main body 10 and the storage case 15 is as shown in the sectional view of FIG. In FIG. 3, the fire transmitter of the present invention is roughly divided into a main body 10 and a front cover 11.
The non-locking type push button switch 1 is incorporated in the storage case 15 of the main body 10. Specifically, the push button switch 1 is mounted on the back side printed circuit board 16 by soldering, and the printed circuit board 16 is placed in the storage case 15. It is assembled by screwing and fixing.

A confirmation light 3 and a telephone jack 5 using LEDs are mounted on a printed circuit board 16, and the circuit connection shown in FIG. 4 is realized by a printed pattern.
A back cover 18 is mounted on the back side of the printed circuit board 16. For this reason, FIG. 1 shows a state where the back cover 18 of the storage case 15 is removed. Storage case 1
A return coil spring 19 is interposed between the push button switch 1 incorporated in the cover 5 and the pressing protection plate 13 located behind the pressing hole 12 of the front cover 11.

When a fire is detected, when the pressing protection plate 13 is pushed in with a fingertip, the coil spring 19 is compressed, the knob 20 of the push button switch is pushed in, and the switch contact of the push button switch 1 is turned on. The pressing protection plate 13 is held by the lock spring 21 of the built-in locking mechanism at the switch-on position of the push button switch 1. The release of the pressure protection plate 13 held at the switch-on position to the off position is achieved by opening the upper display door 14 and pressing the lock spring 21 provided therein to open the locking portion, thereby releasing the pressure protection plate 13. The lock is released, and the coil spring 19 returns to the illustrated initial position (off position).

Referring again to FIG. 1, the printed circuit board 16
As shown in FIG. 4, a jumper wire 6 for connecting between the common terminal C on the power / signal line side and the common terminal TC on the telephone line side is mounted, and the jumper wire 6 is connected to the storage case 15 as shown in FIG. The middle portion is drawn out from the drawing groove 22 formed on the side surface of the outside. A protection block 23 is integrally formed below the draw-out groove 22 from which the jumper wire 6 is drawn, and a thickness D of the protection block 23 forms an installation space for the jumper wire 6 in a state where the fire transmitter is installed. It is possible to prevent the jumper wire 6 pulled out from 22 from being crushed at the time of installation and coming into contact with a member at the installation location to be cut or short-circuited.

As a matter of course, a jumper wire 6 having a coating is used. Further, on the side of the case opposite to the side from which the jumper wire 6 is drawn out in the storage case 15 of FIG.
A terminal block for three signal line terminals A, L and C on the power / signal line 7 side and a terminal block for two terminals T and TC on the telephone line 8 side shown in FIG.

Reference numeral 24 denotes a pair of mounting holes provided on the back surface of the main body 10. Next, the operation of the above embodiment will be described. First, at the stage of manufacturing the fire transmitter according to the present invention, when the printed circuit board 16 is assembled into the storage case 15 on the back side of the main body 10 as shown in FIG. The jumper wire 6 with the cover, which is mounted with a margin, is taken out from the draw-out groove 22 on the side surface of the storage case 15 and mounted. A terminal for taking out the jumper wire 6 from the lead groove 22 to the outside is set to an appropriate length so as to fit in a space determined by the thickness D of the protection block 23 formed on the lower side.

When the printed circuit board 16 has been assembled with the jumper wires 6 pulled out, a back cover 18 is attached to the back side of the printed circuit board 16 as shown in FIG. When installing the thus-produced fire transmitter of the present invention at the site, if the noise on the telephone line does not matter so much, the fire transmitter is installed without changing the jumper line 6.

On the other hand, if noise is superimposed on the telephone line and it is expected that the installation location is of poor communication quality, the common line is independently provided from the receiver side, and the power supply signal line and the telephone line are drawn. When installing the fire transmitter, the jumper wire 6 that is drawn out from the draw-out groove 22 of the storage case 15 is cut off, and as shown in FIG.
And the common line of the telephone line 8 are electrically independent.

The jumper wire 6 may be cut at one location of the jumper wire 6 drawn out, or may be completely cut from the base of the lead groove 22. In consideration of contact with other devices, it is desirable to cut the jumper wire 6 from the extraction portion of the extraction groove 22 to the extraction portion. Note that the internal structure of the sensor body shown in FIG. 3 is merely an example of the present invention, and the common line on the power / signal line side and the common line on the telephone line side are connected by a jumper line 6 on the printed circuit board 16. The present invention can be applied to a fire transmitter having an appropriate structure as it is.

In the above embodiment, the jumper wire 6 is drawn out to the side surface of the storage case 15, but it may be taken out from the back cover 18 mounted on the back side of the printed circuit board 16. Further, in order to keep the inside of the storage case 15 secure when the jumper wire 6 is taken out from the draw-out groove 22, the draw-out groove 22 from which the jumper wire 6 is taken out.
It is desirable to fill the portion with an adhesive or the like and hermetically fix it.

[0023]

According to the present invention, as described above, the jumper wire connecting the power line and the common line of the telephone line is taken out on the back side of the fire transmitter body. When the signal line for power supply and the common line of the telephone line are independently connected to each other, the work of cutting the jumper can be extremely easily performed, and the presence or absence of the cut of the jumper can be easily confirmed.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a fire transmitter from the back as an embodiment of the present invention.

FIG. 2 is a front view of the fire transmitter of FIG. 1;

FIG. 3 is a sectional view showing the internal structure of the fire transmitter of FIG. 1;

FIG. 4 is a circuit diagram showing a conventional transmitter circuit.

FIG. 5 is an explanatory diagram showing connection of a signal line and a telephone line to a transmitter circuit.

[Explanation of symbols]

 1: Push button switch 2a, 2b: Switch contact 3: Confirmation light 5: Telephone jack 6: Jumper wire 7: Power / signal line 8: Telephone line 10: Main body 11: Front cover 12: Press hole 13: Press protection plate 14: Display door 15: Storage case 16: Printed circuit board 18: Back cover 19: Coil spring 20: Knob 21: Lock spring 22: Pull-out groove 23: Protection block 24: Mounting hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A pushbutton switch for turning on by a pressing operation to output an alarm signal, at least one pair of signal line terminals for connecting switch contacts of the pushbutton switch to a power / signal line from a receiver, a telephone jack, A pair of telephone line terminals connecting the telephone jack to a telephone line from a receiver, and a jumper line connecting a common terminal of the signal line terminals and a common terminal of the telephone line terminals. In the fire transmitter, the middle part of the jumper wire is taken out of the case behind the main body containing the circuit board and held there. 2. A fire transmitter according to claim 1, wherein a protection block for securing a space for taking out the jumper wire is provided outside the case from which the jumper wire is drawn.