Adapter for transmitter with indicator light

Abstract

To attach a transmitter with a pilot lamp without performing processing for enlarging an opening even if the opening provided on an attachment surface for an existing pilot lamp and transmitter is small.SOLUTION: In an adapter for a transmitter with a pilot lamp for attaching the transmitter with the pilot lamp in which the pilot lamp and the transmitter with a push button operable from the front are integrally constituted, on a front surface of an attachment plate, it comprises an annular body (20) forming an annular shape having an opening into which at least the rear of a housing of the transmitter can be inserted inside, and formed with a female screw part (20A) which can be screwed into a male screw part formed at least at a part of an outer periphery of the housing of the transmitter or an outer periphery of a housing of the pilot lamp in an inner periphery, and a plurality of holes (20b, 20c) for the screws into which a fixing screw for fixing the annular body to the attachment surface can be inserted or screwed in a cross direction are formed in the annular body.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a technology effective for use in an adapter for a transmitter with a display lamp for sounding an alarm by being operated during a fire and a door for a housing box for disaster prevention-related equipment.

Background Art

[0002] Conventionally, in a building, a fire alarm system (fire alarm equipment) is provided to notify the occurrence of a fire. The fire alarm system includes a fire detector, a manual fire transmitter equipped with a push button switch, a receiver that receives detection signals from the fire detector and the fire transmitter, a bell for fire alarm, a display lamp, etc. Among these, the fire transmitter is installed at an appropriate height position on the wall surface of the corridor etc. of the building. At the time of a fire, when the discoverer strongly presses the push button switch of the fire transmitter, a signal notifying the occurrence of the fire is transmitted to the receiver, and an alarm sound is emitted from the bell provided near the fire transmitter, so that the people around can be notified of the occurrence of the fire.

[0003] The fire transmitter (hereinafter simply referred to as the transmitter) is generally disk-shaped. The transmitter body has a push button switch on the front surface and incorporates a circuit for transmitting a signal when the push button switch is pressed. It is installed by being embedded in the wall surface of a building or attached to the door of a disaster prevention-related equipment box such as a fire hydrant box or a housing box for disaster prevention-related equipment. As an invention related to a housing box for disaster prevention-related equipment to which a transmitter and a display lamp are attached, for example, there is one described in Patent Document 1, and as a design related to a door for a fire hydrant box to which a transmitter and a display lamp are attached, for example, there is one described in Patent Document 2.

[0004] On the other hand, indicator lights are devices installed to indicate the location of disaster prevention equipment such as transmitters and fire hydrant boxes. Conventionally, they were generally bullet-shaped or dome-shaped, but in recent years, flat-type indicator lights with a flat or disc-shaped front surface, and indicator lights integrated with transmitters have also been put into practical use. An example of an invention relating to an indicator light attached to a transmitter is described in Patent Document 3, and an example of an invention relating to a transmitter equipped with a flat-type indicator light is described in Patent Document 4. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-85384 [Patent Document 2] Design Registration No. 1488967 Gazette [Patent Document 3] Japanese Patent Publication No. 2018-101135 [Patent Document 4] Japanese Patent Publication No. 2018-120516 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] Conventional bullet-shaped indicator lights protrude approximately 60 mm from the mounting surface. Due to this large protrusion, they are being replaced in recent years with flat-type indicator lights to avoid potential obstacles to passage and transportation, reduce the risk of damage, and improve aesthetics. There is also a demand to replace transmitters and indicator lights installed on building walls and doors of disaster prevention equipment storage boxes with flat-type transmitters with indicator lights. However, transmitters with indicator lights have a larger casing than transmitters alone because they contain a lamp (LED) housing. Therefore, when replacing conventional indicator lights or transmitters installed on building walls or doors of disaster prevention equipment storage boxes with transmitters with indicator lights, the openings originally provided on the mounting surface for routing wiring or fitting parts of the transmitter body are small. As a result, it may be necessary to enlarge the openings on the mounting surface when installing transmitters with indicator lights. Furthermore, when installing a transmitter with an indicator light on the door of a disaster prevention equipment storage box, it is possible to remove the original indicator light. However, simply removing the indicator light would expose the opening provided for wiring, resulting in a decrease in aesthetic appeal.

[0007] This invention was made in view of the above-mentioned problems, and its objective is to provide an adapter that allows a transmitter with an indicator light to be mounted on a mounting surface without having to enlarge the opening, even if the opening provided on the mounting surface for existing indicator lights or transmitters is small. Another object of the present invention is to provide a door for a disaster prevention equipment housing box that does not degrade in appearance even when the original indicator light or transmitter is replaced with an indicator light-equipped transmitter and the unnecessary indicator light and transmitter are removed. [Means for solving the problem]

[0008] To achieve the above objective, the present invention An adapter for a transmitter with an indicator light, which is configured as an integrated unit with an indicator light and a push button that can be operated from the front, is used to mount a transmitter with an indicator light on the front of a mounting plate. It has an opening on the inside through which at least the rear part of the transmitter housing can be inserted. ru wa Equipped with a form, The annular body is formed with multiple screw holes through which fixing screws for securing the annular body to a mounting surface can be inserted or screwed in in the front-to-back direction. 、 The screw hole comprises a first groove having a width greater than the diameter of the head of the fixing screw, and a second groove that is continuous with the first groove in the thickness direction of the annular body and has a width smaller than the diameter of the head of the fixing screw but larger than the diameter of the male thread portion of the fixing screw. The second groove is formed on the back side of the annular body, and two grooves are provided parallel to each other in the tangential direction from opposing positions on either side of the center of the annular body.That is what happened.

[0011] With the adapter configuration described above, the adapter is fixed to the mounting surface, and the indicator light transmitter is attached to the adapter. This allows the indicator light transmitter to be mounted on the front side of the mounting surface. Therefore, even if the opening provided on the mounting surface for existing indicator lights or transmitters is small, the indicator light transmitter can be mounted on the mounting surface without having to enlarge the opening. In addition, existing disaster prevention equipment housing boxes (or switch boxes) and doors for disaster prevention equipment housing boxes can be reused.

[0013] Also, With the above configuration, after attaching the fixing screws to the designated positions on the mounting surface, the adapter is slid onto the fixing screws from top to bottom, and the transmitter with indicator light is attached to the adapter, thereby fixing the transmitter with indicator light to the mounting surface, making the installation work easy. In addition, existing disaster prevention equipment housing boxes (or switch boxes) and doors for disaster prevention equipment housing boxes can be reused.

[0014] Here, preferably, the first groove is configured such that its bottom surface has a slope that becomes higher as it moves from the opening at the lower end towards the inner part at the top.

[0015] With this configuration, it becomes easier to insert the fixing screw (screw 21) into the first groove (screw insertion groove 20d), and when the fixing screw is moved relative to the back of the first groove, the lower surface of the fixing screw head presses against the stepped portion of the first groove, so that even if an upward force is applied to the adapter, the adapter will not easily move and come off the mounting surface. [Effects of the Invention]

[0018] According to the adapter for a transmitter with an indicator light according to the present invention, even if the opening provided for the existing indicator light or transmitter is small, the transmitter with an indicator light can be mounted on the mounting surface without having to enlarge the opening. Installation can be easily carried out. Furthermore, existing fire-related equipment enclosures (or switch boxes) and doors for fire-related equipment enclosures can be reused. This has the effect of... [Brief explanation of the drawing]

[0019] [Figure 1] This is an exploded perspective view showing one embodiment of the adapter for a transmitter with an indicator light and the transmitter with an indicator light according to the present invention. [Figure 2] Figure 1 is a perspective view showing the indicator light and transmitter of the transmitter with indicator light integrated into one unit. [Figure 3] This shows a first embodiment of an adapter for a transmitter with an indicator light according to the present invention. (A) is a front view of the adapter, and (B) is a cross-sectional view taken along line A-A of the adapter in (A). [Figure 4] This shows a modified example of the adapter of the first embodiment shown in FIG. 3. (A) is a front view of the adapter, and (B) is a cross-sectional view taken along line A-A of the adapter in (A). [Figure 5] This shows a second embodiment of an adapter for a transmitter with an indicator light according to the present invention. (A) is a front view of the adapter, (B) is a cross-sectional view taken along line A-A of the adapter in (A), and (C) is a cross-sectional view taken along line B-B of the adapter in (A). [Figure 6] It is a perspective view showing an example of a suitable transmitter with an indicator light using the adapter of the second embodiment. [Figure 7] This shows a modified example of the adapter of the second embodiment shown in FIG. 5. (A) is a front view of the adapter, and (B) is a cross-sectional view taken along line A-A of the adapter in (A). [Figure 8] This shows a third embodiment of an adapter for a transmitter with an indicator light according to the present invention. (A) and (B) are cross-sectional views of different parts of the adapter. [Figure 9] This shows a configuration example of a door for a disaster prevention-related equipment storage box. (A) is a perspective view of the door with an individual indicator light and a transmitter attached, (B) is a perspective view of the door with the indicator light removed and a transmitter with an indicator light attached, and (C) is a perspective view of the door with a closing cover attached to the opening for the indicator light and a transmitter with an indicator light attached. [Figure 10] It is a side view showing a specific example of a closing cover for closing an opening provided in a door for a disaster prevention-related equipment storage box according to a fourth embodiment of the present invention. [Figure 11] (A) and (B) are side views showing the state where the closing cover is attached to the opening provided in the door for the disaster prevention-related equipment storage box.

Modes for Carrying Out the Invention

[0020] Hereinafter, an embodiment of an adapter for a transmitter with an indicator light to which the present invention is applied will be described with reference to the drawings. The transmitter adapter of this embodiment has the function of mounting the indicator light transmitter to the front side of the opening on the mounting surface. Therefore, the configuration of the adapter 20, along with the configuration of the indicator light transmitter 100 to be mounted, will be described below.

[0021] (First Embodiment) Figure 1 shows the adapter 20 of the first embodiment together with the indicator light transmitter 100 to which it is to be attached. The indicator light transmitter 100 shown in Figure 1 consists of a transmitter body 10 and an indicator light 15 which is integrated in a manner that houses the transmitter body 10. The transmitter unit 10 has a function to transmit a signal to a receiver to indicate the occurrence of an abnormality, such as a fire, by pressing a push button firmly to turn on an internal switch. It comprises a housing unit 12 that has a push button 11 located near the center of the front and houses a circuit board, and a mounting base 13 provided at the front end of the housing unit 12.

[0022] The mounting base body 13 has an opening 13B in the center that faces the front of the push button 11, and a nearly flat front panel portion 13A that is oval-shaped when viewed from the front. A stepped portion 13C is formed so as to protrude rearward from the back of the front panel portion 13A, and partial male screws 13D1 and 13D2 are formed on the arc-shaped upper and lower surfaces of this stepped portion 13C.

[0023] The indicator light 15 comprises a pair of display units 51A and 51B located on both the left and right sides of the transmitter body 10, and a base portion 52 having a storage recess capable of housing the housing portion 12 of the transmitter body 10. An opening 53 is formed in the center of the bottom wall of the base portion 52 through which the housing portion 12 of the transmitter body 10 can be inserted. As shown in Figure 2, the transmitter body 10 and the indicator light 15 are integrated when the housing portion 12 and the stepped portion 13C of the transmitter body 10 are housed in the storage recess. Furthermore, a recess is formed on the back of the front panel of the display section 51A, 51B of the indicator light 15, and a circuit board with a light-emitting element mounted on it can be housed in this recess. The indicator light 15 is made of transparent or translucent resin colored with red paint, and when the light-emitting element is lit, the display section 51A, 51B emits red light.

[0024] The adapter 20 is made up of a nut (ring-shaped nut) which has a ring shape overall and a female thread portion 20A on its inner circumference that can be screwed into the male threads 13D1 and 13D2 mentioned above, and is configured to be fixed to the mounting surface 30 by a screw 21. The transmitter with indicator light 100 is fixed to the mounting surface 30 by the housing portion 12 of the transmitter body 10 passing through the opening 53 of the base portion 52 of the indicator light 15 and being inserted into the opening of the mounting surface 30, and then screwing it into the female thread portion 20A of the adapter 20 which is fixed to the mounting surface 30. In addition, when the transmitter body 10 is screwed into the adapter 20, the base portion 52 of the indicator light 15 is sandwiched between the mounting base body 13 and the mounting surface 30, so that the indicator light 15 is also fixed to the mounting surface 30 in a combined state with the transmitter body 10.

[0025] Figure 3 shows the structure of the adapter 20 in detail. In Figure 3, (A) is a front view of the adapter 20, and (B) is a longitudinal cross-sectional view showing the interior, cut along line AA of (A). As shown in Figure 3(A), in this embodiment, two keyhole holes 20b through which screws can be inserted are formed on the front side of the adapter 20 at opposing positions on either side of the center, and as shown in Figure 3(B), the adapter is fixed by inserting two screws 21 through the keyhole holes 20b and screwing them into the mounting surface 30.

[0026] The two keyhole holes 20b are formed to be point-symmetrical. After screwing the screw 21 into the mounting surface 30, the screw 21 is fitted into the larger of the keyhole holes 20b. When the entire adapter 20 is rotated counterclockwise, the screw 21 moves into the smaller of the keyhole holes 20b, thereby fixing the adapter 20 to the mounting surface 30 by the screw 21. As shown in Figure 3(B), the adapter 20 of this embodiment is provided with a female threaded portion 20A on its inner circumferential surface. When the male threads 13D1 and 13D2 of the transmitter body 10 are screwed into the female thread portion 20A and the transmitter with indicator light 100 is mounted on the mounting surface using the adapter 20, the flange portion on the outer circumference of the front panel of the indicator light 15's display section 51A and 51B closes a portion of the opening side of the daruma hole 20b. The amount of protrusion of the flange portion on the outer circumference of the front panel of the display section 51A and 51B can be increased to cover and hide the entire opening of the daruma hole 20b.

[0027] Figure 4 shows a modified version of the adapter 20 shown in Figure 3. In this modified example, instead of providing two keyhole holes 20b on the front side of the adapter 20, two screw holes 20c are provided on the back side of the adapter 20, and the adapter 20 is fixed to the front surface of the mounting surface 30 by inserting screws 21 from the back surface of the mounting surface 30 and screwing them into the screw holes 20c. In addition, screw holes for screwing in transmitters and indicator lights may already be formed near the opening 30A of the mounting surface 30. In such cases, the adapter 20 can be fixed to the mounting surface 30 using these screw holes. Alternatively, the adapter 20 may be configured so that it is attached from the back using self-tapping screws, without providing screw holes on the back.

[0028] According to the adapter of this embodiment configured as described above, the adapter can be fixed to the front surface of the mounting surface, and the indicator light transmitter 100 can be mounted on the mounting surface using this adapter. This has the advantage that mounting can be performed without having to enlarge the opening that was originally provided on the mounting surface. Furthermore, because the adapter 20 has the above-described configuration, if the length of the flange portion on the outer periphery of the front panel of the indicator light 15 is short and it is not possible to completely cover the daruma hole 20b as shown in Figure 3(B), it is possible to eliminate the daruma hole 20b, thereby preventing a portion of the daruma hole 20b from being visible from the front.

[0029] Furthermore, in the above embodiment, the transmitter with indicator light 100 is attached to the mounting surface 30 by screwing the partial male threads 13D1 and 13D2 on the outer circumference of the transmitter body 10 into the female thread portion 20A on the inner circumference of the adapter 20 fixed to the mounting surface 30. However, the transmitter with indicator light may also be attached to the mounting surface 30 by providing a male thread portion on the entire or a part of the outer circumference of the housing of the indicator light 15 and screwing this male thread portion into the female thread portion 20A on the inner circumference of the adapter 20 fixed to the mounting surface 30. In this case, the transmitter body 10 and the indicator light 15 are connected by screws. Furthermore, it is preferable that the adapter 20 has a female threaded portion 20A on its inner circumference that matches the position of a keyhole or screw hole, so that the indicator light transmitter 100 does not tilt from side to side when the indicator light transmitter 100 is screwed into and fixed to the mounting surface 30.

[0030] Furthermore, for example, a retaining piece or inner flange may be provided at the front end of the opening of the indicator light 15 so as to contact the side edge of the front of the transmitter body 10 from the front, so that when the male threaded portion of the indicator light 15 is screwed into the female threaded portion 20A of the adapter 20, a part of the transmitter body 10 is sandwiched between the adapter 20 and the indicator light, thereby automatically fixing the transmitter with the indicator light. Alternatively, partial male threads 13D1 and 13D2 may be provided on the outer circumference of the transmitter body 10, and a male threaded portion that screws into the female threaded portion 20A of the adapter 20 may also be provided on a part of the outer circumference of the housing of the indicator light 15.

[0031] (Second Embodiment) Figure 5 shows the adapter 20 of the second embodiment. In Figure 5, (A) is a front view of the adapter 20, (B) is a cross-sectional view showing the inside when cut along line AA of (A), and (C) is a cross-sectional view showing the inside when cut along line BB of (A). In the second embodiment shown in Figure 5, instead of fixing the transmitter 10 by screwing it into a female threaded portion 20A on the inner surface of the adapter 20, multiple locking pieces 22, each having a claw 22a at an intermediate height position, are provided on the inner wall of the adapter 20 along the circumferential direction, as shown in Figure 5(B). (Four pieces in the figure.)

[0032] Figure 6 shows an example configuration of a transmitter with an indicator light that is suitable for fixing using the adapter 20 shown in Figure 5. As shown in Figure 6, the transmitter body 10 of the transmitter in Figure 6 is not provided with partial male screws 13D1 and 13D2. However, in the transmitter shown in Figure 6, a recess (groove) G is formed at the boundary between the outer surface of the transmitter body 10 and the outer surface of the indicator light 15 which is integrally coupled with it. The adapter 20 shown in Figure 5 is configured to fix the transmitter to the adapter 20 by engaging the claws 22a of the four locking pieces 22 with the parts (four locations) of this recess G that are enclosed by the dotted lines (circles).

[0033] The locking piece 22 has a free end on the front side of the adapter 20 (the upper side of (B)). When the transmitter with indicator light is inserted from the front, the outer surface of the indicator light 15 deforms the locking piece 22 as it enters the inside of the adapter 20. When the claw 22a aligns with the recess at the boundary between the outer surface of the transmitter body 10 and the outer surface of the indicator light 15, the locking piece 22 moves inward due to elastic restoring force, and the claw 22a of the locking piece 22 engages with the recess G, functioning as a retainer. The number of locking pieces 22 is not limited to four; one or more on the upper and lower sides are sufficient. The adapter 20 is fixed to the mounting surface 30 by screws 21 inserted into bolt holes 20c provided on the front side of the adapter 20. The bolt holes 20c may be oval-shaped holes similar to those in Figure 3, or they may be fixed from the back side of the mounting surface 30 by screws 21, as shown in Figure 5.

[0034] Figure 7 shows a modified version of the adapter 20 shown in Figure 6. In this modified example, as shown in Figure 7(C), a pair of screw insertion grooves 20d, each having a width sufficient for the screw head 21 to be inserted and a width sufficient for the screw neck 21 to be inserted, are formed parallel to each other vertically along the tangential direction, as shown in Figure 7(A). These screw insertion grooves 20d have an open lower end, and by aligning the lower end opening of the screw insertion grooves 20d with two screws 21 that have been pre-screwed to the edge of the opening 30A of the mounting surface 30, and then moving the adapter 20 downward, the screws 21 are moved relative to the back of the screw insertion grooves 20d, thereby fixing the adapter 20 to the front surface of the mounting surface 30.

[0035] Furthermore, when viewing the state shown in Figure 7(A) from the side, the screw insertion groove 20d should be formed such that the bottom surface (stepped portion) of the wide groove into which the head of the screw 21 fits has a slope that becomes higher from the opening at the lower end towards the back at the top. This makes it easier to insert the screw 21 into the screw insertion groove 20d, and when the screw 21 is moved relative to the back of the screw insertion groove 20d, the underside of the head of the screw 21 presses against the stepped portion of the screw insertion groove 20d, preventing the adapter 20 from easily moving and coming off the mounting surface 30 even when an upward force is applied to the adapter 20.

[0036] (Third embodiment) Figure 8 shows the adapter of the third embodiment. The adapter of the third embodiment has a female threaded portion 20A on the inner circumferential surface of the adapter (annular nut) 20, but instead of that, a male threaded portion 20B is provided on the outer circumferential surface of the adapter 20, and a retaining ring 23 is provided which has a female threaded portion 23B that can be screwed into the male threaded portion 20B and a flange portion 23A on the inside of the front end surface.

[0037] The flange portion 23A of the retaining ring 23 has an opening formed such that its inner edge contacts the outer peripheral edge of the indicator light 15 of the indicator light transmitter, which is inserted so as to contact the front surface of the adapter 20. By sandwiching the edge of the indicator light 15 between the flange portion 23A and the adapter 20 with the retaining ring 23, the indicator light transmitter 100 can be fixed to the mounting surface 30 by the adapter 20. The adapter 20 is fixed to the mounting surface 30 by screws 21 inserted into bolt holes 20c provided on the front side of the adapter 20. The bolt holes 20c may be oval-shaped holes similar to those in Figure 3, or they may be fixed from the back side of the mounting surface 30 by screws 21, as shown in Figure 5.

[0038] (Fourth embodiment) Figures 9 to 11 show an embodiment of a door for a disaster prevention equipment housing box to which the present invention is applied, and an embodiment of a cover that closes the opening for an indicator light provided in the door. Conventionally, as shown in Figure 9(A), there is a disaster prevention equipment housing box 30 in which a conventional indicator light 33, a speaker or bell sound hole 32, and a conventional transmitter 34 are provided on the front door 31. In addition, although not shown, there are fire hydrant boxes housed inside the walls of buildings that have an indicator light and a transmitter on the front door.

[0039] As described above, conventionally, the doors of disaster prevention equipment storage boxes equipped with indicator lights and transmitters have been fitted with bullet-shaped indicator lights. Furthermore, it was common for the indicator lights and transmitters to be installed separately. Because bullet-shaped indicator lights protrude significantly, they become an obstacle during movement and transport, and there is a demand to replace them with flat-type indicator lights. In addition, as transmitters with indicator lights are becoming more widespread, there are cases where it is desirable to replace existing disaster prevention equipment storage boxes with transmitters with indicator lights as shown in the above embodiment.

[0040] However, if the conventional indicator light 33 and conventional transmitter 34 provided on the conventional door 31 for disaster prevention equipment are removed and the indicator light-equipped transmitter 100 is installed, the opening 30A where the indicator light or transmitter was installed will be exposed, as shown in Figure 9(B). This embodiment provides a cover suitable for closing this exposed opening. Figure 9(C) shows a state in which the conventional transmitter 34 provided on the conventional door 31 for disaster prevention equipment is replaced with the indicator light-equipped transmitter 100, and the opening (30A) for the indicator light is closed with the cover 40 of this embodiment. Furthermore, it is preferable that the cover 40 be made of a resin or the like that is the same color as the surrounding area, for example, the color of the disaster prevention equipment housing box. For example, disaster prevention equipment housing boxes may change color from white to cream, and by preparing a cover 40 that matches the color of the disaster prevention equipment housing box to which it will be attached, it is possible to close the opening with a cover of the same color as the housing box and make it less conspicuous.

[0041] As shown in Figure 10, the cover 40 for closing the opening in this embodiment consists of a disc-shaped cover body 41 having a diameter larger than the diameter of the opening for mounting an indicator light or transmitter provided in the door of the disaster prevention equipment housing box, a male screw body 42 erected in the center of one side of the cover body 41, and a disc-shaped annular nut 43 having a female screw portion 43a that can be screwed into the male screw body 42. The annular nut 43 is provided with a plurality of screw insertion holes 43b on its outer edge. The screw insertion holes 43b have a large diameter portion formed from the front to a predetermined depth, which is larger than the head of the screw to be used, and a small diameter portion formed on the rear side, which is smaller than the head of the screw and smaller than the screw portion. It is preferable that the annular nut 43 has a larger diameter than conventional indicator lights or conventional transmitters.

[0042] The cover 40 shown in Figure 10 comprises a relatively large-diameter disc-shaped cover body 41 and a disc-shaped annular nut 43, each having a male screw body 42 and a female screw portion 43a that can be screwed together. Therefore, when the opening formed in the door 31 for the disaster prevention equipment housing box is small, the opening can be closed by sandwiching the panel of the door 31 between the cover body 41 and the annular nut 43 as shown in Figure 11(A), and when the opening is small, the opening can be closed as shown in Figure 11(B). The cover for closing the opening of this embodiment can accommodate doors for disaster prevention equipment housing boxes with openings of different sizes.

[0043] Furthermore, if the panel of the door 31 cannot be sandwiched, the opening can be closed by inserting a screw into the screw insertion hole 43b provided on the outer edge of the ring nut 43 to fix the ring nut 43 to the mounting surface, and then screwing the cover body 41 onto this ring nut. Also, even if the panel of the door 31 can be sandwiched between the cover body 41 and the ring nut 43, if the opening is large, the opening can be closed by inserting a screw into the screw insertion hole 43b to fix the ring nut 43 to the back surface of the panel, and then screwing the cover body 41 onto this ring nut. This prevents the screwed-in cover body 41 and ring nut 43 from shifting while still screwed in, thus preventing part of the opening from being exposed.

[0044] Although the present invention has been described above based on embodiments, the present invention is not limited to those of the embodiments described above. For example, in Figure 10, the cover body 41 of the opening closing cover 40 is shown to be circular, but the shape of the cover body 41 is not limited to a circle and may be other shapes such as a polygon such as a square or a star shape. The annular nut 43 is also not limited to a circle and may be other shapes such as a polygon such as a square or a star shape, and may be composed of a small-diameter boss portion having a screw insertion hole 43b and a plurality of arm portions extending radially from the boss portion. Furthermore, if the annular nut 43 has a gripping portion as shown on the outer circumference in Figures 3 and 4, it will be easier to install. Furthermore, in the first to third embodiments, the left and right light-emitting display sections 51A and 51B of the indicator light 15, which is combined with the transmitter body 10, are shown to be curved, but other shapes such as crescent, semi-circular, triangular, or ring-shaped may also be used.

[0045] Furthermore, although the above embodiment shows the mounting base 13 of the transmitter body 10 as being oval-shaped when viewed from the front, the shape of the mounting base 13 is not limited to oval, and may be circular, elliptical, rectangular, or other shapes. Furthermore, although the above embodiment described the application of the present invention to a device combining a fire alarm transmitter and an indicator light that can be combined with the transmitter, the present invention is not limited to fire alarm transmitters and can be widely used for train emergency alarm transmitters installed on station platforms and level crossings. Furthermore, the indicator light-equipped transmitter adapter and blocking cover of the above embodiment are applicable not only to doors for disaster prevention equipment housing boxes, but also to transmitters and indicator lights that are mounted individually on switch boxes or the like embedded in walls (panels). [Explanation of Symbols]

[0046] 100 Transmitter with Indicator Light 10 Transmitter unit 11 Push Buttons 12 Main unit case 13 Mounting base 13A Front Panel 13B opening 13C Paragraph section 13D Partial Male Thread 14 Small Doors 15 Indicator light 51A,51B Display section 52 Base 53 Aperture 20 adapters 20A Female thread section 20b Daruma hole 22 Locking piece 23 Retaining ring 30 Mounting surface 31 Door for storage box of disaster prevention equipment 33 Conventional indicator lights 34 Conventional transmitters

Claims

1. An adapter for a transmitter with an indicator light, which is configured as an integrated unit with an indicator light and a push button that can be operated from the front, is for mounting the transmitter with an indicator light to the front of a mounting plate, It comprises an annular body having an opening on the inside through which at least the rear part of the transmitter housing can be inserted, The annular body has a plurality of screw holes formed therein, through which fixing screws for fixing the annular body to a mounting surface can be inserted or screwed in in the front-to-back direction. The screw hole comprises a first groove having a width greater than the diameter of the head of the fixing screw, and a second groove that is continuous with the first groove in the thickness direction of the annular body and has a width smaller than the diameter of the head of the fixing screw but larger than the diameter of the male thread portion of the fixing screw. An adapter for a transmitter with an indicator light, characterized in that the second groove is formed on the back side of the annular body, and two grooves are provided parallel to each other in the tangential direction from opposing positions on either side of the center of the annular body.

2. The adapter for a transmitter with an indicator light according to Claim 1, characterized in that the first groove has a slope on its bottom surface that becomes higher as it moves from the opening side at the lower end towards the back at the top.

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