JP2505241Y2 - fire alarm - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a fire receiver, a display,
The present invention relates to a fire alarm such as a repeater.

[Conventional technology and its problems]

In the conventional fire alarms such as fire receivers that receive fire signals, etc. to display the fire area, etc., display devices that display the fire area, etc., and relays that transmit fire signals etc. to the fire receiver, circuit parts There is known a case in which a door is attached to an enclosure for accommodating the like with an inner hinge.

In such an inner hinge type fire alarm, such as a fire alarm, as shown in FIG.
In order to avoid that one end of the door collides with the housing 2 and cannot be opened and closed, the edge of the door 4 on the side of collision, that is, the edge of the inner hinge 3 side is floated from the housing 2 to attach the door 4. In this case, there is a problem that dust may enter through the gap or the left and right depth dimensions may be different. Therefore, as shown in FIG. 6, a packing 6 or the like is provided on the other end side so that the door 4 is parallel to the housing 2.

However, both of the above, against a strong impact on the door 4,
Since the inner hinge 3 is mainly configured to support, the inner hinge 3
Are easily damaged by impact, and when the door 4 is opened, a part of the door 4 on the inner hinge 3 side exceeds the width of the fire alarm 1, so that the alarms 1 such as these are closely connected. I couldn't.

[Means for solving the problem]

In order to solve the above problems, the present invention provides a fire alarm in which a door body that covers an opening is attached to the front surface of a housing that has an opening in the front surface and a circuit component is accommodated by an inner hinge so as to be openable and closable. The housing is formed by bending inward a front edge of each side wall of the housing to form an opening front edge that surrounds the opening, and the housing is an inner curved edge in which an edge is bent inward at a peripheral edge thereof. And a side plate having a width smaller than the width of the housing and covering the opening of the housing. So that the side plate is inside one side wall of the housing,
And, the other side plate of the door body is attached to the housing so as to be substantially flush with the other side wall of the housing without protruding outward, and the inner curved edge of the one side plate of the door body is , The trailing edge between the side plate and the inner curved edge does not collide with the opening front edge of one side wall of the housing when the door body is rotated about the rotation axis of the inner hinge. At the position, it is bent inward, and the inner curved edge of each of the other side plates of the door body is bent inward so as to abut against each of the other front edges of the opening when the door is closed. It was a fire alarm.

[Action]

The fire alarm configured as described above does not project the door to the outside of the housing when the door is opened and closed. Therefore, even when a plurality of alarms 1 are connected, the door can be opened and closed between the alarms. There is no need to provide a gap for

In addition, the inner curved edge of the door body, except for the one inner curved edge on the side with the inner hinge, and the other inner curved edges contact the front edges of the openings of the housing, so the dustproof effect is enhanced and the impact is increased. Also has the effect of becoming stronger.

〔Example〕

An embodiment of the fire alarm according to the present invention is shown in FIG.
This will be described with reference to FIG.

In FIG. 1, 1 is a fire alarm such as a fire receiver, 2 is a housing, 3 is an inner hinge, and 4 is a door that covers the front surface of the housing 2.

In the housing 2, 21 is an opening provided in the front surface of the housing 2, 22 is one side wall, 23 is the other side wall on the opposite side, 24 is a lower side wall, 221, 231, 241 are front edges of the side walls 22 to 24. It is an opening front edge formed by bending inward.

In the inner hinge 3, one end 31 has one side wall 22 of the housing 2.
The fixed arm 32 fixed to the rotary arm 33 is rotatably supported by the rotary shaft 33 on the other end side of the fixed arm 31, and is fixed to the side plate 42 of the door body 4.

In the door body 41, 41 is its front plate, 42 is one side plate connected to the front plate 41, 43 is the other side plate on the opposite side, 44 is a lower plate, and 421, 431, 441 are end edges of each side plate 42-44. Is formed by bending inwardly so as to abut the front edges 221, 231, 241 of the openings of the housing 2, and 422 is provided on the inner curved edge 421 into which the fixed arm 31 of the inner hinge 3 enters when the door body 4 is opened. Notched portions, 423 is a front corner edge of the side plate 42, and 424 is a rear corner edge formed on the inclined surface of the side plate 42.

The width of the door body 4 covers the opening 21 of the housing 2,
Further, it is formed so as to be narrower than the width of the housing 2. The door body 4 has a front corner edge of one side plate 42 when the door body 4 is opened and closed.
A rotation locus L1 drawn by 423 is an extension line L of one side wall 22 of the housing 2.
2 so that the side plate 42 of the door body 4 is located inside the side wall 2 of the housing.
It is attached to the housing 2 by the inner hinge 3 so that the other side plate 43 of the door body 4 is substantially flush with the other side wall 23 of the housing 2 so that a gap L3 is formed with respect to 2. There is.

In addition, the inner curved edge 421 of the door body 4 is such that the rotation locus L4 of the rear corner edge 424 of the inclined surface does not project to the inside of the housing 2 from the opening front edge 221 of the housing 2, and the rotation axis 33 of the inner hinge 3 causes The other inner curved edges 431, 441 and the inner curved edge of the upper plate (not shown) are formed so as to be positioned inward and contact the front edge of the opening when the door is closed. Opening front edge 23
1, 241 and the upper side wall (not shown) are bent so as to come into contact with the front edge of the opening.

Reference numeral 51 is a printed circuit board on which various circuit parts such as a fire signal receiving circuit are mounted, 52 is a district indicator lamp connected to the printed circuit board 51 by an electric wire (not shown), and 53 is a set screw of the door body 4.

In the fire alarm device 1 configured in this way, the door body 4 does not project to the outside of the housing 2 when the door body 4 is opened and closed. There is no need to provide a gap for opening and closing the door.

Further, when the door body 4 is closed, the inner curved edge 421 of each side plate of the door body 4 is closed.
However, since the contact with the housing 2 except for the cutout portion 422 of the inner curved edge 421, the intrusion of dust into the alarm device 1 can be significantly reduced, and sufficient strength against external impact can be obtained. Can be protected.

3 and 4 show another different embodiment of the present invention.

The embodiment of FIG. 3 differs from the embodiment of FIGS. 1 and 2 in that the rear corner edge 424 between one side plate 42 of the door body 4 and the inner curved edge 421 is formed into a curved surface. In other respects, the other parts are similar.

In the embodiment of FIG. 4, the inner curved edge 421 is formed by bending the side plate 42 at a substantially right angle so that the rotation locus L4 drawn by the rear corner edge 424 does not collide with the opening front edge 221 in the same manner as above. Then, the further inner curved edges 441 and the like are bent so as to contact the opening front edge 241 and the like of the housing 2. Also in this embodiment, except for the inner curved edge 421, the other inner curved edges come into contact with the front edges of the openings of the housing 2, so that the dustproof effect is higher than that in the conventional example, and the impact resistance is high. Get stronger.

〔effect〕

According to this invention, the fire alarm, when opening and closing the door,
The door body does not project to the outside of the housing, so that even when a plurality of alarm devices 1 are connected, there is an effect that it is not necessary to provide a gap for opening and closing the door between the alarm devices.

In addition, the inner curved edge of the door body, except for the one inner curved edge on the side with the inner hinge, and the other inner curved edges contact the front edges of the openings of the housing, so the dustproof effect is enhanced and the impact is increased. It also has the effect of becoming stronger against.

[Brief description of drawings]

1 is a cross-sectional plan view of an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional plan view of an essential part of FIG. 1, and FIGS. 3 and 4 are enlarged cross-sectional plan views of other embodiments of the essential part. 5 and 6 are schematic plan views of a conventional example. 1 ... Fire alarm, 2 ... Housing, 3 ... Inner hinge, 4 ... Door body, 21
... Opening, 22 ... One side wall, 23 ... Other side wall, 24 ... Lower side wall, 221,231,241 ... Opening front edge, 42 ... One side plate, 43 ... Other side plate, 421,431,441 ... Inward curving edge, 424 ... Rear corner edge , L4… Rotation locus of rear corner.

Claims (1)

(57) [Scope of utility model registration request] 1. A fire alarm in which a door having an opening on the front surface and housing a circuit component is attached to a front surface of the housing to cover the opening by an inner hinge so that the door can be opened and closed. A front edge of each side wall of the housing is bent inward to form an opening front edge that surrounds the opening, and the door body is provided with a side plate having an inner curved edge whose end edge is bent inward at the periphery thereof. Forming a width narrower than the width of the housing and covering the opening of the housing, and the door body is an inner hinge, and one side plate of the door body on the side having the inner hinge is formed on the side wall of the housing. The door body is attached to the housing so that the side plate is on the inner side of one side wall and the other side plate of the door body is substantially flush with the other side wall of the housing without protruding outward. The inner curved edge of the one of the side plates has a rear corner edge between the side plate and the inner curved edge so that the door body is fixed to the rotation axis of the inner hinge. It is bent inward at a position where the rotation trajectory drawn when it is rotated to the center does not collide with the opening front edge of one side wall of the housing, and the inner curved edges of the other side plates of the door body are closed doors. The fire alarm, wherein the fire alarm is formed by being bent inward so as to contact the other front edges of the other openings of the casing in the state.