JP3354062B2 - Gas leak alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leak alarm mounted on a wall or the like of a house, and more particularly to a gas leak alarm having a structure in which a winding portion of a power supply cord and an alarm device main body are separated. It is about.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show a conventional general gas leak alarm. A code winding plate 26 integrally formed with a code winding shaft 25 is attached to the back side of the alarm device body 1 with screws 27, and the cord 21 is attached to the code winding shaft 25.
And connected to the equipment in the alarm device main body 1. The cord 21 is connected to a power supply via a plug 28 and an outlet 36. The mounting plate 29 is provided with a hooking claw 30, a steadying claw 31, and a hole 32, and is fixed to the wall surface 12 or the like with a wood screw 33 through the hole 32. The hook 3 of the cord winding plate 26 is inserted into the hook 30 of the mounting plate 29.
4 and the steady rest hole 35 is engaged with the steady rest claw 31, so that the alarm device main body 1 is connected to the cord winding plate 26.
Together with the mounting plate 29.

[0003]

Gas leak alarms generally need to be replaced with new ones after their expiration date (usually 5 years). However, in the conventional gas leak alarm described above, since the cord winding plate 26 and the alarm device main body 1 are integrally mounted, the mounting plate 29 is used as it is. Even though the device 21 is still usable, the device 21 is discarded together with the main body 1 of the alarm device, and there is a problem that the cost is high for the user and the waste increases for the manufacturer.

Further, since the cord 21 is also discarded, it is not only troublesome to rewire the replaced cord of the alarm unit 1 to the wall surface 12, but also to attach the cord 21 before attaching the alarm unit 1 to the mounting plate 29. It is necessary to adjust the winding length (length up to the outlet 36), but since it is simply wound around the winding shaft 25 and adjusted, it is difficult to set the length accurately, and there is an error in the length. There is also a problem that the slack is likely to occur with the alarm device.

The present invention has been made in view of the above points. By separating the alarm device main body from the mounting portion, the alarm device main body alone can be replaced, and the mounting portion, the cord winding portion and It is an object of the present invention to provide a gas leak alarm that can reuse a code as it is.

[0006]

According to a first aspect of the present invention, there is provided an alarm device comprising: a mounting portion mounted on a wall surface; and an alarm device main body having a built-in alarm device. A gas leak alarm device configured to supply power to a main body, wherein the mounting portion is fixed to the wall surface, and includes a case having a cord housing portion that houses a cord winding portion therein, The cord winding section has a winding shaft for winding a cord and a female terminal for connecting the cord, and is rotatably housed in the cord housing section. A male terminal that is detachably attached to the attachment portion and that contacts the female terminal in the attached state is formed, and a disc is formed on both sides of the winding shaft in the cord winding portion. On the front disk Irregularities are stopping part of the shape formed ring form, on the alarm body is characterized in that the pawl for locking the irregularities are formed.

For this reason, according to the first aspect of the present invention, the mounting portion in which the cord winding portion is accommodated is fixed to the wall surface, and after the cord winding portion is rotated to adjust the length by winding the cord, an alarm is issued. The container body is detachably attached to the attachment portion. When replacing the alarm device with a new one, only the alarm device main body can be replaced by removing only the alarm device main body from the mounting portion, and the mounting portion, the cord winding portion and the cord can be reused as they are. In addition, the winding length of the cord can be accurately adjusted by rotating the cord winding section.

[0008]

In addition, according to the first aspect of the present invention, when the main body of the alarm device is mounted on the mounting portion, the claws hit the concave and convex portions of the stopping portion and the rotation of the cord winding portion is stopped, so that the cord can be wired without slack. .

According to a second aspect of the present invention, there is provided the gas leak alarm according to the first aspect, wherein the front case and the rear case are overlapped with each other and screwed to the wall, and the case is fixed between the front and rear cases. Wherein the cord housing portion is formed, a circular opening is formed in the front case, and a stop portion of the cord winding portion is exposed in the opening.

According to the present invention, the cord winding portion is accommodated in the cord accommodating portion between the front case and the back case, and the front and back cases are screwed, so that the attaching portion and the cord winding portion are wound. A unit with the unit can be configured.

The invention described in claim 3 is the first or second invention.
4. The gas leak alarm according to claim 1, wherein the female terminal of the cord winding unit is provided around a first disk-shaped terminal provided at a center of rotation of the front disk, and provided around the first terminal. A ring-shaped second terminal, and the male terminal of the alarm device main body is constituted by a protruding terminal that comes into contact with the first terminal and the second terminal, respectively.

Therefore, in the invention according to the third aspect, the position of the terminal does not change regardless of the position where the cord winding section is rotated, and the male terminal of the alarm device main body can always contact.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. 7 and 8 are denoted by the same reference numerals.

Referring to FIGS. 1 and 2, a gas leak alarm A according to the present embodiment includes an alarm main body 1, a mounting portion 2, and a cord winding portion 3.

As shown in FIG. 3, the mounting portion 2 is composed of a front case 4 and a back case 5 in the form of a rectangular and flat container, and holes 6 are formed in four corners of the front and back cases 4, 5. ing. A convex portion 7 (see FIG. 2) is formed at the center of the back case 5, a circular opening 8 is formed in the front case 4, and four locking claws are formed on the outer peripheral surface of the opening 8. 10 are formed. The front case 4 and the back case 5 are stacked,
The cord 6 is screwed from the hole 6 to the wall 12 with a wood screw 11, thereby forming a cord housing 9 between the cases 4 and 5.

The cord winding section 3 includes a hollow winding shaft 15.
Is formed in a disc shape in which front and rear disks 13 and 14 are integrally formed on both sides of the disk 1. A concave 16 (see FIG. 2) is formed on the rear disk 14 so as to be rotatably fitted to the convex portion 7. Disc 1
3 is a ring-shaped stopper 18 having an unevenness 18a on the front surface.
Is formed. The front surface of the front disk 13 is suppressed by the inner peripheral surface of the opening 8 of the front case 4, and the stopper 18 is exposed at the opening 8.

At the center of rotation of the front disk 13, a disk-shaped first terminal 20a and a ring-shaped second terminal 20a
b. The tip of the cord 21 is inserted into the winding shaft 15 and soldered to the first and second terminals 20a and 20b. After soldering, the cord winding unit 3 is rotated to wind the cord 21 around the winding shaft 15 and the length is adjusted so as not to sag.

On the back side of the alarm device main body 1 in which the alarm device is built, four locking holes 22 (see FIGS. 2 and 5) corresponding to the locking claws 10 of the mounting portion 3 are formed, and the cord winding is performed. A claw 23 is formed at one location to engage with the unevenness 18a of the stopper 18 of the take-up portion 3, and male terminals 24a, 24b projecting from the center portion contact the female terminals 20a, 20b of the cord take-up portion 3. Have been.

The alarm device main body 1 is attached to the mounting portion 2 by inserting the locking hole 22 into the locking claw 10 of the mounting portion 2. At this time, the rotation of the cord winding unit 3 is stopped by the claw 23 hitting the uneven portion 18a of the stopping unit 18. Also,
The male terminals 24a and 24b are connected to the female terminals 20 of the cord winding section 3.
a and 20b, respectively, whereby the power in the alarm device body 1 is turned on. Since the first terminal 20a is located at the center of rotation of the cord winding unit 3 and the second terminal 20b has a ring shape, the male terminals 24a and 24b are in contact with each other regardless of the position where the cord winding unit 3 is rotated. it can.

When replacing the alarm with a new one,
By removing the alarm device main body 1 from the locking claw 10 of the mounting portion 2, only the alarm device main body 1 can be replaced, and the mounting portion 2 and the cord winding portion 3 can be reused as they are.

As described above, in the gas leak alarm of the present embodiment, the alarm device main body 1 is separated from the mounting portion 2 and the cord winding portion 3 so that only the alarm device main body 1 can be replaced. In other words, the mounting portion 2, the cord winding portion 3, the cord 21 and the like which can still be used can be reused without being discarded, so that there is an advantage that resources are not wasted and the replacement cost is reduced for the user.

Further, since the cord winding section 3 is rotatable, even after the mounting section 2 is fixed to the wall surface, the cord winding section 3 is rotated to wind the cord 21 so that the length of the cord can be reduced. Easy to adjust.

[0024]

As described above in detail, according to the first aspect of the present invention, a cord winding portion is provided on a mounting portion mounted on a wall surface, and only an alarm device body having a built-in alarm device is separated. Therefore, when replacing the alarm with a new one, by removing only the alarm main body from the mounting part, only the alarm main body can be replaced, and the mounting part, cord winding part and cord can be reused as they are, In addition, resources can be saved and costs borne by users can be reduced. Further, the winding length of the cord can be accurately adjusted by rotating the winding shaft.

In addition, according to the first aspect of the present invention, a ring-shaped stopper having irregularities is formed on the cord winding portion,
Since the claw that locks to the stopper is formed on the alarm body, when the alarm body is attached to the mounting part, the claw hits the uneven part of the stopper, the rotation of the cord winding part is stopped, and the cord does not slack. Wiring can be styled well.

According to the second aspect of the present invention, since the mounting portion is configured such that the front case and the back case are overlapped and screwed to the wall surface, the mounting portion is provided in the cord accommodating portion between the front case and the back case. By housing the cord winding unit and screwing the front and rear cases together, a unit including the mounting unit and the cord winding unit can be easily configured.

According to the third aspect of the present invention, the terminal of the cord winding section has a disk-shaped first terminal provided at the center of rotation of the front disk and a ring-shaped second terminal surrounding the first terminal. Since the terminal is configured with the terminal, the terminal of the alarm device main body can be contacted regardless of the position where the cord winding section is rotated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a gas leak alarm of the present invention.

FIG. 2 is a longitudinal sectional side view partially showing a mounted state of the embodiment.

FIG. 3 is an exploded perspective view of a mounting portion and a cord winding portion according to the embodiment.

FIG. 4 is a front view of a mounting portion and a cord winding portion according to the embodiment.

FIG. 5 is a rear view of the alarm device main body according to the embodiment;

FIG. 6 is a partially enlarged cross-sectional view of a stopper according to the embodiment;

FIG. 7 is an exploded perspective view of a conventional gas leak alarm.

FIG. 8 is a side view of a conventional gas leak alarm mounted state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Alarm body 2 Mounting part 3 Code winding part 4 Front case (case) 5 Back case (case) 8 Opening 9 Cord accommodation part 11 Wood screw 12 Wall surface 13 Front side disk 14 Back side disk 15 Winding shaft 18 Stop 18a Unevenness 20a First terminal (female terminal) 20b Second terminal (female terminal) 21 Cord 24a, 24b Male terminal

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G08B 21/16 H01R 13/46

Claims (3)

(57) [Claims] 1. A gas leakage alarm device comprising: a mounting portion mounted on a wall surface; and an alarm device main body in which an alarm device is built, wherein power is supplied to the alarm device main body by a cord. The part is configured by a case fixed to the wall surface and provided with a cord housing part for housing a cord winding part therein, and the cord winding part connects the winding shaft for winding the cord and the cord. The alarm device main body is detachably attached to the attachment portion, and contacts the female terminal in the attached state. A male terminal is formed and configured, and the cord winding portion has a disk formed on both sides of the winding shaft, and a ring-shaped stopper having irregularities formed on the front disk. The alarm body formed A gas leak alarm device, characterized in that a claw that locks to the unevenness is formed on the gas leak alarm device. 2. The case, wherein a front case and a back case are overlapped and screwed to the wall surface, the cord housing portion is formed between the front and back cases, and a circular opening is formed in the front case. 2. The gas leak alarm according to claim 1, wherein a stop portion of the cord winding portion is formed and is exposed at the opening. 3. The female terminal of the cord winding section includes: a first disk-shaped terminal provided at the center of rotation of the front disk;
A ring-shaped second terminal provided around the first terminal; and a male terminal of the alarm device main body is formed of a protruding terminal that comes into contact with the first terminal and the second terminal, respectively. The gas leak alarm according to claim 1 or 2, wherein: