JP3621198B2 - Rainproof alarm device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rainproof alarm device installed in a store, a factory, a home, or the like.
[0002]
[Prior art]
Usually, in a store, a factory, a home, or the like, an alarm device is installed in case of a disaster. Since this alarm device may be installed not only indoors but also outdoors, a rainproof alarm device provided with a rainproof film to prevent intrusion of moisture such as rain and snow has been proposed (actual implementation) Sho 62-149882).
[0003]
Such a conventional rainproof alarm device will be described below with reference to the drawings. FIG. 11 is a schematic perspective view showing a conventional rainproof alarm device. In the figure, reference numeral 50 denotes a cover plate, which projects screw holes 50a and 50a for screwing a base 52 serving as a base of the globe 51 and a light emitter (not shown) such as a lamp at a position above the apparatus main body. Hole 50b is provided. In addition, openings 50c made of through holes arranged in a grid are provided at positions below these holes, and an activation switch 54 is attached to the lower side of the holes together with the activation switch frame 53. Yes.
[0004]
The globe 51 is a semi-elliptical member having an internal cavity that covers the light emitter, and has a threaded portion 51 c at a portion attached to the base 52. The base 52 is a disk-shaped member having a female screw portion 52c that engages with the screw portion 51c on the inner side surface, and includes screw holes 52a and 52a that overlap with the screw holes 50a and 50a, and a hole 52b that overlaps with the hole 50b. Is provided.
[0005]
Reference numeral 55 denotes a main body case, in which a circuit board for an alarm device, the above-described light emitter, and the like are provided (not shown). A speaker 57 is stored in the storage portion 56 in the main body case 55, and a rainproof film 58 is attached to the sound generation portion side of the speaker 57. The rainproof film 58 is attached so as to be sandwiched between the speaker 57 and the acoustic opening 59. Here, the acoustic opening 59 is a disk-like member having a certain thickness for forming a resonance part between the rainproof film 58, and a plurality of acoustic holes are provided on the surface. Reference numeral 60 denotes a pressing ring for fixing the rain-proof film 58 protruding from the edge of the storage portion 56.
[0006]
[Problems to be solved by the invention]
By the way, in the conventional rainproof alarm device described above, in order to attach the globe 51 to the cover plate 50, the base 52 having the female screw portion 52c that engages with the screw portion 51c of the globe 51 is used. This is because when the bulb 51 is broken when the globe 51 is detachable and a normal bulb such as a lamp is used as the light emitter, the bulb is easily replaced.
[0007]
However, in recent years, LEDs (light emitting diodes) are frequently used as the light emitters. For this reason, the light emitter is rarely damaged in a normal usage pattern, and after the rainproof alarm device is attached, the glove is made detachable even if it is detachable. Therefore, the screw part, base, etc. have substantially lost their significance, and rather have a problem that the construction of the rainproof alarm device is complicated, resulting in complicated manufacturing processes and increased manufacturing costs. It was.
[0008]
Furthermore, if the glove can be easily attached and detached from the outside, only the glove may be removed due to mischief. In such a case, the function of emitting light to the surroundings is impaired by the illuminant and the globe, and the illuminant is exposed to the outside, so that the illuminant and its mounting part, and even the elements in the alarm device are damaged. There was a problem of increased fear.
[0009]
On the other hand, if moisture such as rain and snow enters the globe, it will splash water on the light emitters and circuit boards, etc., and may damage these parts. Therefore, it is necessary to prevent moisture from entering the globe by some means. is there. In the above-described rainproof type alarm device, no special rainproof means is provided at the glove mounting portion, and intrusion of rain and snow is prevented by bringing the members into close contact with each other. Further, as other means, there is a means in which an annular rubber packing is interposed as a rainproof means between the globe and the base or between the base and the cover plate.
[0010]
However, in the case of close contact between the members, moisture permeates through capillarity at the close contact portion, so that the rainproof function cannot be perfected. Further, when a rubber packing is used as rainproof means, the rubber packing may be eroded by moisture such as rain and snow, or may be deteriorated by pressure held between members. For this reason, for example, in the case of a severe usage pattern such as being installed outdoors and exposed to bad weather for a long time, there is a possibility that water may enter the rainproof alarm device from the glove mounting portion.
[0011]
In addition, the mechanism for generating an alarm sound is also composed of a combination of independent members such as a speaker, a rainproof film, a sound generation opening, and a press ring, so that the configuration of the entire rainproof alarm device is also complicated. It was a factor.
[0012]
The present invention has been made in view of such circumstances, and while maintaining the functions required as an alarm device, the structure of the device can be simplified and a more complete rainproof function can be secured. An object is to provide a rain alarm device.
[0013]
[Means for Solving the Problems]
The invention according to claim 1 includes a speaker that emits an alarm sound inside the main body case and a circuit that drives the speaker, and an alarm device that issues an alarm by operating a start switch. A cover plate attached to the front surface of the main body case, and a cylindrical member whose front end portion fits the groove, A cylindrical member inserted into the groove portion with an outer peripheral side surface of the portion and an inner peripheral side surface of the groove portion, and the light emitter and the cylindrical member attached to the front surface of the cover plate It has a glove to cover.
[0014]
According to a second aspect of the present invention, in the rainproof alarm device according to the first aspect, the outer peripheral side surface of the cylindrical member is inclined in the inner diameter direction until just before the tip portion.
[0015]
According to a third aspect of the present invention, in the rainproof alarm device according to the first or second aspect, the cylindrical member is provided with a flange portion having a diameter larger than that of the cylindrical portion at a base end thereof. Yes.
[0016]
According to a fourth aspect of the present invention, in the rainproof alarm device according to any one of the first to third aspects, the cover plate is a mounting hole having a predetermined shape formed on a circumference surrounding the light emitter. And the groove portion is formed along a concentric circle on the inner side of the circumference, and the globe is formed in the shape of the attachment hole at the edge portion on the attachment side to the cover plate. A claw portion projecting in accordance with the screw hole and a concave portion that overlaps the screw hole, the claw portion is fitted into the mounting hole, and a screw is fitted into the superposed screw hole and the concave portion. And a glove attached to the cover plate.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
<1. Appearance configuration>
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an external configuration of a rainproof alarm device according to an embodiment of the present invention.
[0018]
In FIG. 1, reference numeral 1 denotes a cover plate, and a globe 2 is attached at a position above the apparatus main body. The cover plate 1 has a predetermined shape and size at predetermined positions so that the start switch 4, the recovery switch 5, and the acoustic hole seal 6 provided on the main body case 3 appear when the cover plate 1 is fitted to the main body case 3. A hole is provided.
[0019]
The globe 2 is a semi-elliptical member having an internal cavity, and an edge 2 a corresponding to a surface obtained by cutting the ellipse is attached to the cover plate 1. Although not appearing in appearance, a rainproof ring is provided inside the globe 2 to prevent intrusion of moisture such as rain and snow. The shape of the inside of the globe 2, the shape of the rainproof ring, its installation mode, etc. will be described later.
[0020]
The main body case 3 is a case in which various members for generating an alarm sound and the like are accommodated. The start switch 4 is a switch for operating the alarm ON / OFF. Once pressed, the start switch 4 is kept on until the recovery switch 5 is pressed, and the alarm continues to be issued. The acoustic hole seal 6 is a sticker attached to the surface of a mechanism that emits an alarm sound (hereinafter referred to as “alarm sound generating portion”), and is provided with a plurality of acoustic holes 6a, together with a display portion for battery testing. 6b. The details of the alarm sound generation unit mentioned here will also be described later.
[0021]
<2. Mounting structure of globe 2 to cover plate 1>
Next, a structure for attaching the globe 2 to the cover plate 1 will be described. FIG. 2 is a perspective view showing the cover plate 1 removed from the main body case 3 and shows a state in which the globe 2 is removed from the cover plate 1. FIG. 3 is a plan view when only the cover plate 1 is viewed from above.
[0022]
In FIG. 2, 7 is an LED protruding in the center of the globe mounting position of the cover plate 1, and has a terminal connected to a power supply terminal provided in the main body case 3 on the back side of the cover plate 1.
[0023]
Reference numeral 8 denotes a belt-like hole composed of a wide part (wide part 8a) and a narrow part (narrow part 8b), which are provided at four equal intervals surrounding the LED 7 at an equal interval in the longitudinal direction. The shape is curved along the circumference (see FIG. 3). Here, the circumference in which the belt-like holes 8 are located corresponds to the size of the edge 2 a that is an attachment portion of the globe 2. Screw holes 9 are provided between the belt-like holes 8 on the circumference.
[0024]
Reference numeral 10 denotes a groove having a diameter smaller than the circumference and formed along the circumference inside the belt-like hole 8 and the screw hole 9. The width w and depth d of the groove portion 10 have predetermined dimensions that fit with the lower edge portion of the rainproof ring 11 (see FIG. 2).
[0025]
The rainproof ring 11 is a substantially cylindrical member including a cylindrical portion 11a extending in the vertical direction in FIG. 2 and an annular collar portion 11b formed on the upper edge thereof toward the outside. 4A and 4B are a vertical sectional view and a plan view of the rainproof ring 11 seen from below. As shown in FIG. 4A, the thickness of the cylindrical portion 11a is gradually decreased with the cylindrical portion outer peripheral side surface Sa slightly inclined to the position of the stepped portion 11c. In addition, this inclination is given as needed, and may be usually flat. Further, the lower edge portion below the stepped portion 11c is further extended by a certain length h with a certain thin wall thickness v to form a narrow edge portion 11d.
[0026]
Here, the wall thickness v is slightly smaller than the width w, the length h is substantially equal to the depth d, and the outer diameter of the narrow edge portion 11d and the inner diameter of the groove portion 10 are equal. As a result, the inner peripheral side surface of the groove portion 10 and the outer peripheral side surface of the narrow edge portion 11d are in close contact with each other, and the outer peripheral side surface of the groove portion 10 and the inner peripheral side surface of the narrow edge portion 11d are loosely fitted.
[0027]
On the other hand, four claw portions 12 having an L-shaped cross section corresponding to the band-shaped holes 8 are provided on the edge portion 2a of the globe 2 shown in FIG. Further, the cross section of the globe 2 is as shown in FIG. 5, and a semi-elliptical shape is formed by an inclined inner surface formed in a step shape from the edge 2a to the tip 2b. Here, the length (step) of each step of the stepped inner surface becomes smaller toward the tip portion 2b, and the rainproof ring is longest from the lower end surface of the edge portion 2a to the first step 2c. 11 is slightly longer than the length from the stepped portion 11c to the upper surface of the flange portion 11b. Reference numeral 2d denotes a recess formed on the inner surface side of the edge 2a, and is positioned where it overlaps with the screw hole 9 when the globe 2 is attached to the cover plate 1.
[0028]
The attachment part of the globe 2 described above has a shape in which the narrow edge portion 11d is fitted to the groove portion 10, the rainproof ring 11 is inserted into the cover plate 1, and the globe 2 is placed thereon. Here, the globe 2 is attached to the cover plate 1 by inserting the claw portions 12 into the narrow portions 8b by rotating the claw portions 12 through the wide portions 8a of the belt-shaped holes 8 and then rotating the gloves 2 for a small amount. . Further, after attaching the globe 2 with the belt-like hole 8 and the claw portion 12 in this way, a screw is press-fitted into the screw hole 2d and the screw hole 9 that are overlapped from the back side of the cover plate 1 to prevent the globe 2 from rotating. Thus, the globe 2 is fixed.
[0029]
FIG. 6 shows how the globe 2 is attached to the cover plate 1 so as to cover the rainproof ring 11 as described above. This figure is a cross-sectional view of the center of the attachment portion of the globe 2. As shown in the drawing, a water channel X is formed on the inner surface side of the attachment portion of the globe 2 by a cylindrical portion 11a and a collar portion 11b having an L-shaped cross section.
[0030]
Here, when the portion indicated by the symbol B in FIG. 6, that is, the fitting portion between the narrow edge portion 11d and the groove portion 10 is enlarged, it is as shown in FIG. In this figure, the vertical direction is the vertical direction when the rainproof alarm device is actually installed. As shown in the drawing, the inner peripheral side surface S1 of the groove portion 10 and the outer peripheral side surface S2 of the narrow edge portion 11d are in close contact with each other in a state where the rainproof ring 11 is elastically deformed, and the outer peripheral side surface of the cylindrical portion Since Sa is slightly tilted to the position of the stepped portion 11c, water such as rain and snow that has entered the globe 2 through a slight gap between the cover plate 1 and the globe 2 is indicated by a symbol W in the figure. It will flow to the cover plate side of the water channel X. That is, the water that has entered the globe 2 flows along the surface of the cover plate 1, hits the outer peripheral side surface Sa of the cylindrical portion, loses kinetic energy toward the rainproof ring 11, and gently flows down through the water channel X. It becomes like this.
[0031]
<3. Internal structure of main body case 3>
Then, the structure in the main body case 3 is demonstrated. FIG. 8 is a view showing the front surface of the main body case 3 when the cover plate 1 is removed. Although omitted here, a circuit board for issuing an alarm in response to the operation of the start switch 4 and the recovery switch 5 is provided inside the main body case 3.
[0032]
In the figure, 13 is a terminal connected to an external AC power source. Reference numeral 14 denotes a rechargeable storage battery used as a standby power supply, which is charged by electric power supplied via a terminal 13. A fuse 15 is composed of a fuse carrier holding a glass tube fuse and a fuse base receiving the fuse carrier. The fuse 15 is provided at a predetermined position on the circuit board corresponding to each of the AC power source connected to the terminals 13 and 13 and the standby power source of the storage battery 14.
[0033]
Reference numeral 16 denotes an LED power supply terminal to which the terminal of the LED 7 is connected. Reference numeral 17 denotes a spare glass tube fuse that is fitted in the main body case 3. Reference numeral 18 denotes an alarm signal input / output terminal.
[0034]
Here, the configuration of the alarm sound generator provided in the main body case 3 will be described in detail. The alarm sound generating unit is configured on the back surface of the speaker mounting portion 19 as shown in FIG. FIG. 9 is a perspective view illustrating a configuration of an alarm sound generating unit with the front surface of the main body case 3 illustrated in FIG. 8 as a bottom surface.
[0035]
In FIG. 9, reference numeral 20 denotes a speaker storage portion provided on the back surface of the speaker mounting portion 19 of the main body case 3. The speaker storage unit 20 includes an annular outer frame 20a that matches the size of the sound generating unit outer edge 21a of the speaker 21, and a packing support unit 20b that supports the speaker packing 22 inside the outer frame 20a. The rain film 23 is stored in such a manner as to be sandwiched between the speaker packing 22 and the speaker 21. Here, the speaker packing 22 is an annular packing for receiving the sound generating portion outer edge 21a of the speaker 21, and the rainproof film 23 is a rainproof film made of a thin film.
[0036]
Reference numerals 20c and 20c denote speaker presses that extend to the outer frame 20a, and have a convex portion that fits the sound generating portion outer edge 21a of the speaker 21 when the speaker 21 or the like is stored in the speaker storage portion 20. Further, a screw receiving hole 20d is provided on the outer side surface of the outer frame 20a, and the sound generating portion outer edge 21a of the speaker 21 housed in the outer frame 20a is pressed by the screw 24.
[0037]
Reference numeral 25 denotes a lattice-shaped opening made of a plurality of L-shaped strip-shaped plates, which are provided at a certain distance from the packing support portion 20b, and the acoustic holes are formed on the bottom surface (the front surface of the main body case 3). A seal 6 is attached. Thereby, a resonance part is formed in front of the sound generation part of the speaker 21 and the rainproof film 23. Further, the lattice-like opening 25 functions to reinforce the acoustic hole 6a of the acoustic hole seal 6 and to protect the rainproof film 23 by making the object difficult to enter from the outside by having an L-shaped cross section. have.
[0038]
<4. Overall configuration>
FIG. 10 shows a cross-sectional view of the central portion of the entire rainproof alarm device described above. As shown in the figure, the cover plate 1 and the globe 2 are integrated, and the configuration of the globe mounting portion is greatly simplified. And in the glove 2, the rainproof ring 11 fits the inner peripheral side surface of the groove portion 10 and the outer peripheral side surface of the narrow edge portion 11d, and the outer peripheral side surface of the groove portion 10 and the inner peripheral side surface of the narrow edge portion 11d. Is inserted in a loose fit. Thereby, the above-mentioned water channel X is formed, and water such as rain and snow that has entered flows downward along the water channel X so as to wrap around the LED 7.
[0039]
In addition, the lattice-like opening 25 is also formed integrally with the main body case 3 for the alarm sound generating portion. Further, since the speaker 21 is firmly fixed and the rainproof film 23 that protrudes from the sound generating portion outer edge 21a is bent to the rear of the sound generating portion of the speaker 21, a conventional rainproof film pressing ring is not required. As described above, in the rainproof alarm device described above, the configuration of the entire device is greatly simplified as compared with the conventional one.
[0040]
【The invention's effect】
As described above, according to the present invention, in the globe, the circumferential groove portion surrounding the light emitter is formed in the cover plate, and the outer peripheral side surface of the tip portion is fit with the inner peripheral side surface of the groove portion. Since the cylindrical member that is closely attached is provided, the water that has entered the glove flows down along the outer peripheral side surface of the cylindrical member. Thereby, moisture does not enter inside the cylindrical member, and it is possible to prevent water from being applied to the luminous body and other internal elements in the globe. In this way, the rainproof function in the rainproof type alarm device becomes more complete, and the effect that the product life can be further prolonged and the durability can be improved in a harsh use environment can be obtained.
[0041]
Here, in the invention described in claim 2, since the outer peripheral side surface of the cylindrical member is inclined in the inner diameter direction until just before the tip portion, water such as rain and snow that has entered the glove is directed to the tip side of the outer peripheral side surface. It will gather and flow. Thereby, it can avoid that the water which permeate | stored accumulates on the outer peripheral side surface of a cylindrical member, and the effect that the water flow along an outer peripheral side surface is accelerated | stimulated and water flows down rapidly is acquired.
[0042]
Furthermore, according to the third aspect of the present invention, since the collar portion is provided at the base end of the cylindrical member, the base end side of the cylindrical member is provided even when a large amount of water enters the glove. It is possible to prevent the intrusion of moisture from the water and to further enhance the rainproof function.
[0043]
On the other hand, in the invention according to claim 4, the glove is attached to the cover plate by providing an attachment hole of a predetermined shape on the circumference outside the groove and fitting the claw provided on the glove side. Does not require a base for glove attachment. Therefore, the rainproof function can be perfected as described above, and the overall structure of the rainproof alarm device can be simplified.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external configuration of a rainproof alarm device according to an embodiment of the present invention.
2 is a perspective view showing the cover plate 1 removed from the main body case 3. FIG.
FIG. 3 is a plan view when only the cover plate 1 is viewed from above.
FIG. 4 is a vertical sectional view (a) of a rainproof ring 11 and a plan view (b) viewed from below.
FIG. 5 is a view showing a cross section of a globe 2;
6 is a cross-sectional view of the center of the attachment portion of the globe 2. FIG.
FIG. 7 is an enlarged view showing a mode of fitting between the groove portion 10 and the narrow edge portion 11d.
FIG. 8 is a diagram showing the inside of the main body case 3 when the cover plate 1 is removed.
FIG. 9 is a perspective view showing a configuration of an alarm sound generating unit with the front surface of the main body case 3 as a bottom surface.
FIG. 10 is a cross-sectional view of the rainproof alarm device according to the embodiment.
FIG. 11 is a schematic perspective view showing a conventional rainproof alarm device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover plate 2 Globe 3 Main body case 4 Starting switch 6 Sound hole seal 6a Sound hole 7 LED
8 Belt-shaped hole 9 Screw hole 10 Groove part 11 Rainproof ring 11a Cylindrical part 11b Collar part 11c Stepped surface 11d Narrow edge part 12 Claw part Sa Cylindrical part outer peripheral side surface S1 Groove part inner peripheral side surface S2 Narrow edge part outer peripheral side X Water channel

Claims (4)

In the alarm device that has a speaker that emits an alarm sound inside the main body case and a circuit that drives the speaker, and that issues an alarm by operating a start switch,
A cover plate attached to the front surface of the main body case, the light emitter provided on the front surface, and a circumferential groove that surrounds the light emitter in plan view;
A cylindrical member having a distal end portion fitted to the groove portion, the outer circumferential side surface of the distal end portion and the inner circumferential side surface of the groove portion being fitted into the groove portion;
A rainproof alarm device comprising a glove attached to the front surface of the cover plate and covering the light emitter and the cylindrical member. The rainproof alarm device according to claim 1, wherein an outer peripheral side surface of the cylindrical member is inclined in an inner diameter direction until just before the tip portion. The rainproof alarm device according to claim 1 or 2, wherein the cylindrical member is provided with a flange portion having a diameter larger than that of the cylindrical portion at a base end thereof. In the rainproof alarm device according to any one of claims 1 to 3,
The cover plate is a cover plate having mounting holes and screw holes of a predetermined shape formed on a circumference surrounding the light emitting body, and the groove portion formed along a concentric circle inside the circumference. ,
The globe has a claw projecting from an edge of the attachment side to the cover plate in accordance with the shape of the attachment hole, and a concave portion overlapping with the screw hole, and the claw is attached to the cover plate. A rainproof alarm device, characterized in that the rainproof alarm device is a glove that is fitted to the cover plate by fitting the screw into the hole and the recessed portion that are fitted into the hole.

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