JP2542422Y2 - Fire detector with clamp - 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 detector with a clamp and a clamp.

[0002]

2. Description of the Related Art A leg of a thermosensitive element is embedded in a support column for holding the thermosensitive element, and the leg is fixed to a printed circuit board having circuit elements by soldering. However, since the soldering operation is troublesome and time-consuming, the operation efficiency is not good. Also, once soldered, it is difficult to freely attach and detach. Therefore, conventionally, a clamp that can be easily attached and detached has been used. (See Japanese Utility Model Laid-Open No. 50-138071)

[0003] In this holding metal fitting, side walls of a rectangular cross section are erected on both sides of the bottom so as to face each other, a holding part is formed at the tip of the side wall, and legs of the thermosensitive element are inserted between the holding parts. The leg portion is held by the holding portion.

[0004]

In the conventional holding metal fitting, since a holding portion is formed at the end of the side wall, a height is required due to its configuration. As a result, the height of the clamp is increased, and the overall size of the fire detector is increased. Further, since the legs are held only by the elasticity of the side wall, a large holding force cannot be obtained. Therefore, a problem of poor contact may occur.

[0005] In view of the above circumstances, the present invention provides a fire with a clamp which can reduce the size of the clamp and enhance the clamping force .
The purpose is to obtain a disaster detector . Another purpose is to make it easy to put on and take off.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a thermosensitive element.
In a fire detector in which a leg is clamped by a clamp,
Metal fittings are inserted into the tips of a pair of side walls standing on both sides of the bottom
Part is formed, and the insertion part side is formed on the insertion part side of the inner surfaces of the both side walls.
Has a free end that slopes toward the center of the bottom as the base end
Spring plate pieces facing each other are provided, and a housing of the sensor is provided.
On the back of the device, sandwich the through hole for the leg of the thermosensitive element.
A pair of insertion grooves are provided, and a pair of insertion portions of the holding bracket are provided.
Are respectively fitted and inserted into a pair of insertion grooves of the housing,
The leg of the heat-sensitive element is sandwiched by the spring plate pieces.
By a fire detector with a clamp fitting ,

A printed circuit board is provided on the back of the housing of the sensor.
Is provided, and the holding bracket is inserted into the printed circuit board.
Holes are provided, and the holding metal fitting is mounted on the printed circuit board.
And soldered to the printed circuit board.
2. A fire with a clamping metal according to claim 1, wherein
A disaster detector is used to achieve the above purpose.
You.

[0008]

When the insertion portion of the clamp is inserted into the fixing portion of the housing, the leg of the heat-sensitive element is clamped by the spring plate piece of the clamp. At this time, since the insertion portion is inserted into the fixing portion of the housing, the more the leg portion presses the spring plate piece, the stronger the holding force. Also, since the spring plate piece is provided on the insertion portion side of the inner surface of the side wall and is inclined toward the center of the bottom,
There is no need to increase the height due to its structure.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same reference numerals have the same names and functions. A support column 4 having a heat-sensitive element such as a bimetal 8 is formed, and the support column 4 is hermetically attached to a predetermined position of the sensor housing 1 with an adhesive.

Printed circuit board 12 on which an electric circuit is separately mounted
And a back cover 15 constituting a wire connection portion, and the tip of a terminal fitting fitted to the back cover 15 is attached to the printed circuit board 1.
The two are integrated by soldering at a predetermined position. Then, the leg 11 of the support column 4 as a lead wire
The printed circuit board 12 integrated with the back cover 15 is opposed to a predetermined position on the sensor housing 1 having a protruding inside. The back cover 15 is fixed with the printed circuit board 12 sandwiched between the screws 16.

As shown in FIGS. 2 to 4, the holding member 13 has a U-shaped cross section and has a side wall 2 formed of one spring plate.
0, 21 and a bottom 23, and the side walls 20, 21 are folded inward to be vertical. The two side walls 20, 2
At one end, insertion portions 24 and 25 are provided. In addition, spring plate pieces 27 and 28 having the insertion portions 24 and 25 as base ends are provided on the side wall inner surfaces 20a and 21a. The spring plates 27 and 28 are formed by cutting and raising the side walls and have free ends inclined toward the center of the bottom 23. At the ends of the spring plate pieces 27, 28, a holding portion 27a,
28a are provided facing each other. Tongue pieces 29 and 30 are provided upright on the short side of the bottom portion 23, and are used for connection such as soldering to the printed circuit board 12.

The insertion portions 24 and 25 of the holding member 13 are
The lower end of the leg 11 of the heat-sensitive element is inserted between the spring plate pieces 27 and 28 to be clamped when it is inserted into the groove 33 of the fixing portion.
At this time, since the insertion portions 24 and 25 of the clamp 13 are fixed to the housing 1, the more strongly the leg portion 11 presses the spring plate pieces 27 and 28, the tighter it is pressed. Further, the protector 2 is mounted on the sensor housing 1 by inserting and locking an engaging portion of the protector 2 into a through hole of the sensor housing 1.

In FIG. 1, reference numeral 5 denotes a metal cover for covering the bimetal 8, and the cylindrical portion of the metal cover 5 and the supporting column 4 are provided.
Is filled with a sealing resin 7. Reference numeral 6 denotes a heat-sensitive plate fitted to the metal cover 5, and 9 denotes a movable contact spring plate provided to face the fixed contact 10. Reference numeral 14 denotes an LE inserted in the hole of the printed circuit board 12.
D.

The embodiment of the present invention is not limited to the above. For example, instead of forming the holding member with one spring plate, the bottom and the side wall are formed separately, and the inner surface of the side wall is formed separately. Of course, a body spring plate may be provided.

[0015]

[Effects of the Invention] Since the present invention is configured as described above, the height of the clamps can be reduced and the size of the entire fire detector can be reduced as compared with the conventional example. Further, since the fixing portion is fixed when the insertion portion of the side wall of the holding member is inserted into the fixing portion of the housing, the mounting operation is simple. Also, when the leg of the heat-sensitive element is pushed between the spring plate pieces, the stronger the pressing force of the leg, the stronger the clamping force. Therefore, unlike the conventional example, a contact failure does not occur.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and is an enlarged longitudinal sectional view of a main part of FIG. 4;

FIG. 2 is an enlarged view of the holding bracket of FIG. 1;

FIG. 3 is a front view of a holding bracket.

FIG. 4 is a side view of the holding member.

FIG. 5 is a longitudinal sectional view showing an embodiment of the fire detector of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Detector housing 4 ... Support column of thermal element 11 ... Leg part of thermal element 13 ... Clamping bracket 20 ... Side wall 21 ... Side wall 23 ... Bottom 24 ... Insert section 25 ... Insert section 27 …… Spring leaf piece 28 …… Spring leaf piece

Claims (2)

(57) [Scope of request for utility model registration] 1. A fire in which a leg of a thermal element is clamped by a clamp.
In the detector, the clamps are erected on both sides of the bottom
An insertion portion is formed at the end of the pair of side walls, and the inner surfaces of the side walls are inserted.
On the entry side, with the insertion section side as the base end, and toward the bottom center
Spring plates with free ends that are inclined
And the legs of the thermosensitive element are provided on the back of the housing of the sensor.
A pair of insertion grooves are provided so as to sandwich the insertion hole of the
A pair of insertion portions of the special fitting are inserted into a pair of insertion grooves of the housing.
Each of the thermosensitive elements is fitted and inserted, and
A fire with a clamping fitting characterized by being clamped by a piece
Disaster detector. 2. A printed circuit board is provided on a back surface of the housing of the sensor.
Is provided, and the holding bracket is inserted into the printed circuit board.
Holes are provided, and the holding metal fitting is mounted on the printed circuit board.
And soldered to the printed circuit board.
2. A fire with a clamping metal according to claim 1, wherein
Disaster detector.