JPH06251269A - Sensor base - Google Patents

Abstract

PURPOSE:To easily connect an electric conductor to an electric conductor connection terminal or detach the electric conductor from the electric conductor connection terminal by enabling the electric conductor connection terminal to be detached freely from a base body part. CONSTITUTION:The electric conductor connection terminal 6 and base body part 2 engages the body part 2 detachably through an engagement claw 6d provided to the terminal 6. At this time, the terminal 6 is engaged detachably with the body part 2 from the arrangement surface of the body part 2 for connection terminals 3a and 5a so that the arrangement side of the electric conductor insertion hole 6a of the terminal 6 is inserted and fitted to a fitting hole 2b. While the terminal 6 is engaged with the body part 2, a conductive pin 51 provided to one terminal plate 13 comes into contact with a contact plate 3b connected directly to a coupling terminal 3a and a conductive pin 51 provided to the other terminal plate 13 comes into contact with a contact plate 5b which is electrically connected to the coupling terminal 5a, so that the electric conductor connection terminal 6 and base body part 2 are electrically connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor base to which a sensor head for detecting smoke, heat, etc. is detachably attached.

[0002]

2. Description of the Related Art A conventional fire detector is used for a disaster prevention device (not shown) represented by a fire receiver, other fire detectors, transmitters, repeaters, etc. It is used by connecting the line via a not-shown) and sends and receives signals to and from the fire receiver in the center, and information such as smoke and heat related to the fire (for example, smoke concentration at the current time and It detects physical quantity information such as temperature change and fire alarm signal indicating that high level smoke or heat is detected, and sends the information to the central fire receiver via the sensor line. ing. For example, a well-known fire detector is shown in FIG. 5. The fire detector includes a detector head 10 for detecting smoke and heat, and the detector head 10 is detachable. It consists of a sensor base 1 which is mounted and fixed on. The sensor base 1 is fixed to a mounting material such as a ceiling material with screws or the like.

An electric wire connecting terminal 6 for inserting and connecting the electric wire 40 is fixedly arranged on the sensor base 1, and connecting terminals 3a, 5a for detachably electrically connecting to the sensor head 10 are also provided. , A light emitting lamp section 9a having a light emitting element. The electric wire connection terminal 6
Is a terminal having a quick-connect terminal structure in which the electric wire 40 is inserted and connected, and constitutes a cable 50 which is connected to a disaster prevention device (fire receiver, other fire detector, transmitter, repeater) in the preceding stage 2
4 electric wires 40 in total so that the electric wires 40 and the two electric wires 40 constituting the cable 50 connected to the disaster prevention device (other fire detector or transmitter) in the subsequent stage are electrically connected to each other.
Can be connected. 2b is the electric wire 4
It is an electric wire insertion port through which 0 is inserted, and is provided at substantially the center of the sensor base 1. The connection terminals 3a and 5a and the electric wire connection terminal 6 are fixedly disposed around the electric wire insertion port 2b and on the same surface side of the sensor base 1, and the electric wire insertion direction is the sensor base 1 It is set at a slight angle to the plane.

Further, the light emitting lamp section 9a detects the fire alarm signal of the sensor head 10 and turns on the light, and also turns on the light emitting element until the fire recovery operation from the fire receiver is performed. It is designed to hold. The self-holding lighting of the light emitting lamp section 9a makes it possible to easily find out which of the plurality of fire detectors fired.

When the electric wire 40 is connected to the conventional sensor base 1 having the above-mentioned structure and is fixedly mounted on the mounting surface 20 such as a ceiling surface, the cables 50, 50 wired behind the mounting surface 20. A hole 20a provided in the mounting surface 20
And the four electric wires 40 of the cables 50, 50 are pulled out to the side of the sensor base 1 on which the electric wire connection terminal 6 is disposed via the electric wire insertion port 2b of the sensor base 1, and the four electric wires 40 are pulled out. After properly inserting and connecting the electric wire 40 of the electric wire 40 to the electric wire connecting terminal 6, the sensor base 1 is attached to the mounting surface 2
Fix to 0 by screwing.

When the sensor head 10 is mounted and fixed to the sensor base 1 fixed to the mounting surface 20 as described above, the sensor head 10 is aligned with the sensor base 1 and the sensor head 10 is fixed. When the sensor head 10 is rotated in one direction, the hook-shaped terminals (not shown) provided on the sensor head 10 are hooked and locked to the connection terminals 3a and 5a, and the sensor head 10 and the sensor base 1 are connected. And are detachably and electrically and mechanically connected and fixed. In the sensor base 1 of FIG. 5 given as a conventional example, the connecting terminals 3a and 5a serve not only to electrically connect the sensor head 10 and the sensor base 1 but also to mechanically fix them. Although configured as described above, there is also one in which a means for mechanically fixing the sensor base 1 and the sensor head 10 is provided separately from the connecting terminals 3a and 5a.

[0007]

By the way, in this type of fire detector, it is obligatory to remove the electric wire 40 from the detector base 1 for wiring check at the time of inspection by a fire department or the like. However, in the conventional sensor base 1, there is a problem that it is very difficult to remove the connected electric wire 40 while the sensor base 1 itself is fixed to the mounting surface 20 such as the ceiling.

Further, in the conventional sensor base 1, since the electric wire 40 is inserted into the electric wire connection port 6 through the electric wire insertion port 2b of the sensor base 1 as described above, the connection work is required. At this time, there is a problem that the electric wire 40 to be connected to the electric wire connecting terminal 6 is stretched, and the construction work is very difficult to perform.

The present invention has been made to solve the above problems, and an object thereof is to provide a sensor base capable of easily connecting an electric wire to an electric wire connecting terminal or removing an electric wire from the electric wire connecting terminal. To provide the structure.

[0010]

SUMMARY OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, is a sensor base for detachably mounting and fixing a sensor head, the base being fixed to a mounting surface such as a ceiling. In the sensor base, in which a connecting terminal for detachably electrically connecting to the sensor head is arranged in the main body part, and a wire connecting terminal for inserting and connecting an electric wire is provided, the electric wire connecting terminal is connected to the electric wire. An electric wire insertion hole for inserting and inserting, a terminal plate for electrically connecting the electric wire inserted and inserted from the electric wire inserting hole to the connecting terminal, and a housing body for accommodating the terminal plate. And a means for removably making electrical contact between the electric wire connecting terminal and the connecting terminal, the electric wire connecting terminal being provided from the side of the connecting terminal on the base main body to the base body. It is characterized in that freely engages releasably on.

[0011]

According to the present invention, the electric wire connecting terminal may be removed from the base main body portion that is still fixed to the mounting surface, and then the electric wire may be connected to or removed from the electric wire connecting terminal. And the removal work can be done easily.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment thereof.

FIG. 1 is a perspective view showing an embodiment of a sensor base according to the present invention, and FIG. 2 is an exploded perspective view of the sensor base. The parts corresponding to those of the conventional example are designated by the same reference numerals.

As shown in FIG. 1, the sensor base 1 of this embodiment is a resin base body 2 fixed to a mounting surface 20 such as a ceiling and having the connecting terminals 3a and 5a.
In addition, the electric wire connection terminal 6 is configured to be removable.

FIG. 4 shows a wire connecting portion 6 of the quick-connect terminal structure.
FIG. As shown in the exploded perspective view of FIG. 1 and the cross-sectional view of FIG. 4, the wire connection terminal 6 includes two terminal plates 13 and 13 each having a metal-molded portion in a substantially U-shape, and the terminal plates 13, Two lock springs 14 and 1 included in 13
4 and resin housing bodies 6x and 6y for accommodating the terminal plates 13 and 13 and the locking springs 14 and 14, respectively. At one end of the terminal board 13, a conductive pin 51,
51 is fixed by soldering, and the terminal plate 13 and the conductive pins 51, 51 are electrically connected to each other. Further, the housing body 6x and the housing body 6y are adapted to be fitted and fixed to each other. Also, the housing body 6y
On one surface, four wire insertion holes 6a are provided,
The electric wires 40, 40 inserted and inserted through the two electric wire insertion holes 6a, 6a are elastically clamped by the one terminal plate 13 and the locking spring 14, and the other two electric wire insertion holes. The electric wires 40, 40 inserted and connected from 6a, 6a are elastically clamped by the other terminal plate 13 and the locking spring 14. Further, the housing body 6a is integrally provided with engaging claws 6d, 6d which are detachably engaged with the base main body 2.

The terminal plate 13 may be partially exposed and the terminal plate 13 may be provided with a wire insertion hole 6a.

When the electric wire 40 is connected to the electric wire connecting portion 6, the tip of the covering portion of the electric wire 40 is peeled off to expose the core wire, and the core wire is inserted through the electric wire insertion hole 6a. Then, as shown in FIG. 4, the core wire 40a is interposed between the locking spring 14 and the terminal plate 13, and the elasticity of the locking spring 14 presses the core wire 40a against the terminal plate 13. Then, the terminal plate 13 and the core wire 40a are brought into electrical contact with each other. At this time, since the locking spring 14 is obliquely hooked to the core wire 40a so as to face the insertion direction of the core wire 40a, even if an attempt is made to remove the core wire 40a from the wire insertion hole, it cannot be easily removed. Further, the electric wire connecting portion 6 is provided with removal holes 6e, 6e for removing the core wire 40a. By inserting and pressing a tool such as a flat-blade screwdriver through the removal hole 6e, the tip of the tool is By pressing the locking spring 14, the locking spring 14 is separated from the core wire 40a, and at that time, the electric wire 40 can be pulled out.

The electric wire connecting terminal of the present invention may be any one as long as it can be connected to the electric wire by requiring a process of inserting and inserting the electric wire from the electric wire insertion hole. 5 year utility model registration application No. 2093], that is, a wire connecting terminal, that is, a terminal plate having a terminal groove into which only the core wire of the electric wire is inserted, and a press for manually pressing the electric wire inserted through the electric wire insertion hole. An electric wire connection terminal comprising a button, wherein the electric wire is inserted and inserted through an electric wire insertion hole, and then the electric wire is pressed by a press button to press the electric wire into a terminal groove provided on the terminal plate. The electric wire connection terminal may be used.

The base body 2 is provided with metal connecting terminals 3a and 5a for electrically connecting the sensor head 10 for detecting smoke and heat associated with a fire, and a light emitting element LED such as a light emitting diode. A light emitting lamp portion 9a having a light emitting circuit 7 on which a resistance element 7a and other circuit elements are mounted, and contact plates 3b and 5b for electrically connecting a plurality of conductive pins 51 of the wire connection terminal 6 respectively. , Are provided. The connection terminal 3a and the contact plate 3b are integrally formed of a metal plate, and the connection terminal 5a and the contact plate 5b are electrically connected to each other through the light emitting lamp section 9a.

A fitting hole 2b is provided in the center of the base body 2 for removably inserting and fitting a part of the wire connecting portion 6. The fitting hole 2b corresponds to the wire insertion port 2b in the conventional example, that is,
When the electric wire 40 is connected to the electric wire connecting terminal 6, the electric wire 40 is inserted once.

The light emitting lamp section 9a is used for the sensor head 1.
A fire alarm signal of 0 is detected through the connecting terminals 3a and 5a and turned on, and the lighting state of the light emitting element is self-maintained until a fire recovery operation is performed from the fire receiver. There is. The self-holding lighting of the light emitting lamp section 9a makes it possible to easily find out which fire detector has fired. Reference numeral 8 is an insulating plate, which is fixed to the back surface side of the light emitting circuit 7 in order to prevent electrical troubles due to external factors of the light emitting lamp section 9a. The configuration may be such that the terminal L2 and the connecting terminal 5a are directly connected without providing the light emitting lamp section 9a.

By the way, the connecting terminals 3a and 5a, as in the conventional example, serve to electrically connect the sensor head 10 and the sensor base 1 and at the same time mechanically fix them. However, it goes without saying that a means for mechanically fixing the sensor base 1 and the sensor head 10 (for example, a resin locking claw) may be provided separately from the connecting terminals 3a and 5a.

As shown in FIG. 3, the electric wire connecting terminal 6 and the base main body 2 having the above-described structure are attached to and detached from the base main body 2 by the engaging claws 6d, 6d provided on the electric wire connecting terminal 6. It is designed to engage freely. At this time,
The electric wire connecting terminal 6 is inserted so that the side of the electric wire connecting terminal 6 on which the electric wire inserting hole 6a is disposed is inserted and fitted into the fitting hole 2b.
The base main body 2 is detachably engaged with the base main body 2 from the side where the connecting terminals 3a, 5a are provided. In the state where the wire connection terminal 6 is engaged with the base body portion 2, the conductive pins 51, 51 provided on the one terminal plate 13 are connected to the contact plate 3b directly connected to the connecting terminal 3a.
To the conductive pin 5 provided on the other terminal plate 13
1, 51 are contact plates 5 electrically connected to the connection terminals 5a.
The electric wire connection terminal 6 and the base main body 2 are electrically connected by contacting b.

When the sensor base 1 having the above-described structure is mounted and fixed to the mounting surface 20 such as a ceiling surface, first, as in the conventional case, the cables 50, 50 wired behind the mounting surface 20 are The four electric wires 40 of the cables 50, 50 are pulled out from the holes 20a provided in the mounting surface 20.
Through the electric wire insertion port 2b of the sensor base 1. Then, the base body 2 is first fixed to the mounting surface 20 with a screw or the like. After that, the plurality of electric wires 40 are inserted and connected to the electric wire connecting terminal 6 removed from the base main body 2, and the electric wire connecting terminal 6 is engaged with the base main body 2.

Also, the electric wire 40 connected from the sensor base 1 by inspection or inspection by a fire department or the like.
When removing the wire, only the wire connecting terminal 6 is removed from the base body 2, and the wire 40 is removed from the wire connecting terminal 6.

In order to connect or disconnect the electric wire 40, an operator often approaches the mounting surface 20 by a stepladder or the like. In the conventional case, however, a sensor is used for connecting or disconnecting the electric wire 40. Unless the base 1 itself is removed from the mounting surface 20, the worker must work facing the mounting surface 20 direction (for example, in the case of the ceiling surface, the upward direction), so the work was very difficult to perform. According to the sensor base 1 of, it is possible to bring the pre-connection terminal 6 close to the hand, and the electric wire connection terminal 6
Since the work of connecting or disconnecting the electric wire 40 to or from the electric wire can be performed near the hand, it is not necessary for the worker to take an unnatural posture, and the work of connecting or removing can be very easily performed.

In this embodiment, the sensor base 1 is exposed and fixed to the mounting surface, but the present invention is an embedded type sensor which is embedded and fixed in the mounting surface such as a ceiling. It can also be applied to the base.

[0028]

[Effects] According to the present invention configured as described above, since the electric wire connecting terminal can be detachably detached from the base body, it is easy to connect the electric wire to the electric wire connecting terminal or to detach the electric wire from the electric wire connecting terminal. You can

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of the present invention.

FIG. 3 is a diagram showing a state in which the wire connection terminal 6 according to the embodiment of the present invention is engaged with the base body 2.

FIG. 4 is a cross-sectional view showing the internal structure of an electric wire connecting terminal 6 according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional sensor base and sensor head.

[Explanation of symbols]

 1 sensor base 2 base body 2b fitting hole 3a connecting terminal 5a connecting terminal 3b contact plate 5b contact plate 6 wire connecting portion 6a wire inserting hole 6d engaging claw 6x. 6y Housing body 13 Terminal plate 14 Locking spring 40 Electric wire 51 Conductive pin

Claims (1)

[Claims] 1. A sensor base for removably attaching and fixing a sensor head, wherein a connecting terminal is detachably electrically connected to the sensor head to a base main body portion fixed to a mounting surface such as a ceiling. And a wire insertion terminal for inserting the electric wire connecting terminal into the electric wire connecting terminal for inserting the electric wire, and an electric wire inserted through the electric wire inserting hole. Comprises a terminal plate that makes electrical contact with the connecting terminal and is electrically connected to the connecting terminal, and a housing body that houses the terminal plate, and the wire connecting terminal and the connecting terminal are detachable from each other and electrically connected. A sensor base, wherein a means for physically contacting is provided, and the electric wire connecting terminal is detachably engaged with the base main body from the side of the base terminal on which the connecting terminal is provided.