Transmitter

Abstract

To prevent intensifying light emission intensity of a part of a protection plate in a transmitter including the protection plate made of a translucent material, having a skin consisting of a woven fabric adhered to an outer surface of an outer surface cover and having a light source disposed inside of the protection plate.SOLUTION: A transmitter comprises: a main body part that builds in a push button switch to be put into an ON state by a pressuring operation from outside; an outer surface cover that is arranged outside of the main body part; and a protection plate that is arranged so as to locate outside of the push button switch, has a rod part in a rear surface, and is made of a translucent material. In the transmitter configured so that the protection plate is pushed to thereby cause the rod part to turn on the push button switch, a light source is disposed inside of the protection plate, the outer surface cover includes the skin adhered to the outer surface, ian opening is formed that has the protection plate arranged on an inner side, and in the skin, the opening is formed that is larger than a cross section of the rod part and smaller than a diameter of a pressuring part of the protection plate, and a light shield part made of a resin layer is provided around the opening.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a transmitter and activation device (hereinafter referred to as a transmitter) for an alarm device that is installed on the wall or the like of a building and issues an alarm when operated in the event of an emergency. [Background technology]

[0002] Conventionally, manual transmitters equipped with push button switches are installed on walls at an appropriate height inside buildings to notify the occurrence of an emergency such as a fire. When an emergency occurs, a person who discovers the emergency presses the push button on the transmitter hard to turn on an internal switch, which transmits a signal notifying the occurrence of the emergency to a receiver, etc., and also emits an alarm sound from a bell installed near the transmitter, thereby notifying people in the vicinity of the occurrence of the emergency.

[0003] In addition, conventional transmitters generally had a structure in which the main body structure served as a base and a compression spring urged the push button (protective plate) outward, so as to generate resistance when the push button was pressed and return it to its original position. Some transmitters having such a configuration are provided integrally with an indicator light for indicating the presence of fire-related equipment (including the transmitter) (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-120516 A Summary of the Invention [Problem to be solved by the invention]

[0005] The indicator light-equipped transmitter described in Patent Document 1 is configured to function as a position indicator light that notifies the presence of the transmitter by emitting light from an arc-shaped light-emitting part disposed around the transmitter, and the outer surfaces of the transmitter and the surrounding light-emitting parts are formed flat. Therefore, visibility from the side is poor. In addition, since the display part and the outer surface of the protective plate are located on the same plane, there is a problem that it is difficult to visually tell where to press.

[0006] Therefore, the applicant has invented and previously filed an application for a transmitter having a protective plate arranged to be positioned outside a push button switch and having a rod portion on its back, configured so that the push button switch is turned on when the protective plate is pressed in, in which the outer cover is composed of a light-guiding member and a cover member made of a translucent material, and a light source is disposed inside the protective plate so that light from the light source is guided by the light-guiding member to cause the entire outer cover to emit light (Patent Application No. 2023-027960).

[0007] Conventional transmitters generally used red-painted metal or red resin on the surface, giving them an inorganic feel, but the transmitter according to the invention of the prior application has a cloth skin attached to the surface of the outer cover, and the entire surface of the outer cover is made to emit light, giving it a warm and soft feel, and an opening smaller than the diameter of the pressing part of the protective plate and larger than the diameter of the rod part is formed in the skin, and the rod part of the protective plate is inserted into the opening in the skin, so that the pressing part is located inward from the outermost part of the outer cover, which has the advantage that it is visually easy to see where to press.

[0008] However, the transmitter according to the above-mentioned prior invention uses a transparent part made of a light-transmitting material for the protective plate so that the internal switch part can be seen, and the light emitted from the light source passes through the skin via the light-guiding member located on the back surface of the skin and the cover member made of a light-transmitting material, and is emitted to the outside from the entire surface of the skin. Therefore, it was found that when the skin is made to emit light at a predetermined brightness, the light emission intensity of the protective plate part becomes strong because the protective plate is a transparent part, and this causes a problem that the light emission balance of the entire transmitter becomes poor.

[0009] The present invention has been made in consideration of the above-mentioned problems, and has as its object to prevent the emission intensity in the protective plate area from becoming too strong in a transmitter which has a protective plate made of a light-transmitting material, a skin made of woven fabric attached to the outer surface of an outer cover, and a light source disposed inside the protective plate, thereby achieving a good emission balance for the entire transmitter. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention provides A transmitter comprising: a main body incorporating a push button switch which is turned on by pressing from the outside; an outer cover disposed on the outside of the main body; and a protective plate disposed outside the push button switch, having a rod portion on its back surface and made of a light-transmitting material, wherein the rod portion turns on the push button switch when the protective plate is pressed in, A light source is disposed inside the protective plate, the outer cover includes a skin attached to an outer surface, and an opening is formed inside in which the protective plate is disposed; An opening larger than the cross section of the rod portion and smaller than the diameter of the pressing portion of the protective plate is formed in the skin, and a light-shielding portion made of a resin layer is provided around the opening.

[0011] According to a transmitter having the above-described configuration, the light-shielding portion made of a resin layer provided around the opening in the skin can attenuate the light from the light source disposed inside the protective plate, thereby preventing the emission intensity in the protective plate area from becoming too strong and achieving a good emission balance for the entire transmitter. Furthermore, since the surface of the outer cover is covered with a skin made of a soft woven fabric, the design is improved, and the opening edge in the center of the skin can be easily held down by the flange of the protective plate, eliminating the need for a complex structure to hold down the skin, thereby reducing manufacturing costs. Also, since the protective plate and the skin are in contact with each other without any gaps, the intrusion of dust and foreign matter can be prevented.

[0012] Here, preferably, the light-shielding portion is formed of a resin layer bonded to the back surface of the skin, The size of the light blocking portion is configured to be at least the same as the size of the pressing portion of the protection plate. According to this configuration, the emission intensity of the entire pressing portion of the protective plate can be weakened, so that the emission balance of the entire transmitter can be improved.

[0013] Also, preferably, the skin is formed of a woven fabric, the light-shielding portion includes a first pattern portion made of a resin layer formed on an edge portion of the opening, and a second pattern portion made of a resin layer formed on an outer side of the first pattern portion, The light transmittance of the resin layer of the first pattern portion is set to be lower than the light transmittance of the resin layer of the second pattern portion.

[0014] According to the above configuration, in a transmitter in which a skin made of woven fabric is attached to the outer surface of the outer cover, the light-shielding section prevents the luminescence intensity of the protective plate from becoming too strong, while also preventing fraying from occurring mainly at the edge of the opening in the center of the skin.This makes it possible to avoid frayed threads getting into the sliding portion when the push button (protective plate) is pressed, causing malfunctions.

[0015] Further, preferably, the light blocking portion is made of a resin layer and is formed to have a gradation. Alternatively, the light blocking portion is formed of a resin layer in a radial pattern. With this configuration, the design of the transmitter can be improved, and the part that needs to be pressed to turn on the push button switch can be easily identified. Also, the light emission balance of the entire outer cover can be easily adjusted.

[0016] In this case, the light blocking portion is formed in a radial pattern made of a resin layer, which can improve the design and make it easier to see the part that needs to be pressed to turn on the push button switch. The resin layer may be attached to the skin at least before cutting the skin to form the opening. Effect of the Invention

[0017] According to the transmitter of the present invention, in a transmitter having a protective plate made of a light-transmitting material, with a skin made of woven fabric attached to the outer surface of the outer cover and a light source disposed inside the protective plate, it is possible to prevent the emission intensity in the protective plate area from becoming too strong, thereby achieving a good emission balance for the entire transmitter. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view showing the appearance of a transmitter with an indicator lamp according to one embodiment of the present invention, as viewed from the outside. FIG. [Diagram 2] 2 is a cross-sectional side view showing the internal structure of the indicator lamp-equipped transmitter of FIG. 1. [Diagram 3] 3 is an enlarged cross-sectional view showing a main part of the internal structure of the transmitter shown in FIG. 2. [Figure 4] 1. FIG. 4 is a perspective view of the inner surface side, illustrating a method of fixing the surface of the cover member of the light-emitting part that constitutes the transmitter with indicator lamp of FIG. [Diagram 5] 4 is a front view showing the configuration of a surface layer made of a woven fabric attached to an outer cover constituting the transmitter of the embodiment. FIG. [Figure 6] 13A and 13B are diagrams showing examples of resin patterns provided on a skin attached to an outer cover of a transmitter according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The transmitter to which the present invention is applied is composed of an outer cover portion having a push button on the inside, a push button switch located inside the outer cover portion and turned on when the push button is pressed, and a transmitter main body portion which incorporates a circuit board which generates a signal when the switch is turned on and sends it to the outside. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a transmitter with an indicator lamp to which the present invention is applied will be described with reference to the drawings.

[0020] 1 and 2 show an embodiment of a transmitter with an indicator lamp to which the present invention is applied. Of these, Fig. 1 is an overall perspective view of the transmitter, and Fig. 2 is a sectional side view showing the internal structure of the transmitter shown in Fig. 1. As shown in FIG. 1, the transmitter of this embodiment is composed of a transmitter main body 10 equipped with a box-shaped storage case 12 with a built-in push button switch, and a disk-shaped transmitter cover 20 connected to the front of the transmitter main body 10, which has a push button 21 that protects the push button switch located inside the center of the outer surface and has a light-emitting portion 22 around it.

[0021] As shown in FIG. 2, the push button (external protective plate) 21 has a rod-shaped pressing rod portion 21a that protrudes inward at the center of its back surface, and inside the storage case 12 of the transmitter main body 10, there is disposed an inner protective plate 13 that is disc-shaped and has a rod-shaped member 13a that protrudes inward at the center of the back surface so as to face the rear end surface of the pressing rod portion 21a. A circuit board 14 having a push button switch 11 mounted thereon is disposed within the storage case 12 at a position facing the rear end of the rod-shaped member 13a of the inner protective plate 13. Although not shown, this circuit board 14 is provided with a circuit that generates a fire signal and sends it to the outside when the push button switch 11 is turned on.

[0022] Furthermore, on the rear surface of the circuit board 14, a terminal block 15 is provided which is equipped with terminals to which ends of external wiring for transmitting signals to a fire control panel are connected. Also, a guide member 16 having an outer guide portion 16a that guides the outer peripheral wall of the inner protective plate 13 and an inner guide portion 16b that fits with and guides the rod-shaped member 13a of the inner protective plate 13 is formed integrally with the storage case 12. A dust cover 17 is attached to the rear end of the storage case 12 to prevent the intrusion of dust and debris. Meanwhile, a flange-shaped plate portion 12a is provided on the front end side of the storage case 12, and a plurality of engagement claws 12b are provided on the outer surface side of the plate portion 12a.

[0023] 2, the transmitter cover 20 comprises a disk-shaped main body plate 22A joined so as to cover the outer opening of the storage case 12 incorporating the push button switch 11, a light guide plate 22B joined to the outer surface of the main body plate 22A, and a cover member 22C joined to the outer surface of the light guide plate 22B. In the center of this transmitter cover 20, a push button 21 is disposed as an outer protective plate for protecting the push button switch 11.

[0024] The body plate 22A of the transmitter cover 20 has a disk-shaped inner flat portion 22a in the center, a cone-shaped portion 22b around the inner flat portion 22a, and a circular outer flat portion 22c around the inner flat portion 22a, and a short cylindrical eaves portion 22d bent inward is formed on the periphery of the outer flat portion 22c. A cylindrical portion 22e protruding inward is provided on the back surface of the center of the body plate 22A, and a rod portion 21a formed on the back surface of the push button 21 so as to protrude inward is inserted into the cylindrical portion 22e.

[0025] 3, a pair of locking claws 22f are formed on the inner peripheral surface of the cylindrical portion 22e, and a pair of grooves 21b are formed on the outer peripheral surface of the rod portion 21a, into which the locking claws 22f are engaged so as to be movable in the axial direction. The rear end of the groove 21b is closed and has a step, and when the push button 21 moves outward, the step comes into contact with the locking claws 22f, preventing further outward movement. In other words, it functions as a position restricting means for restricting the push button 21 from slipping outward. Furthermore, a cylindrical wall portion 22g is provided in the center of the outer surface of the main body plate 22A so as to surround the rod portion 21a of the push button 21, and this wall portion 22g functions as a stopper when the push button 21 is pressed.

[0026] The main body plate 22A of the transmitter cover 20 is connected to the front end of the storage case 12 by engaging an engagement claw 22h provided on the back surface thereof with an engagement claw 12b of the plate portion 12a of the storage case 12. The main body plate 22A is configured so that the engagement claw 22h first comes into contact with the front end of the storage case 12 with the engagement claw 22h and the engagement claw 12b misaligned from each other in the circumferential direction, and then the main body plate 22A is rotated slightly so that the engagement claw 22h engages with the engagement claw 12b. This allows the transmitter cover 20 to be attached to the outer surface side of the transmitter main body portion 10. However, the main body plate 22A and the storage case 12 may be configured to be connected to each other by screws at the plate portion 12a.

[0027] Meanwhile, the light guide plate 22B has a circular opening 22i formed in its center, through which the rod portion 21a of the push button 21 is inserted. Also, the light guide plate 22B has a cone-shaped portion in its center and a flat portion having an annular shape around the cone-shaped portion, in correspondence with the shape of the main body plate 22A, and a visor portion 22j having a short cylindrical shape bent inward is formed on the periphery of the flat portion. In addition, in the transmitter of this embodiment, a circuit board 14 is arranged on the outer surface of the inner flat portion 22a of the main plate 22A of the transmitter cover 20, and has a plurality of light-emitting elements (LEDs: light-emitting diodes) 23 that function as light sources mounted with their emission portions facing outward. On the other hand, the light guide plate 22B has a light incident surface formed at the rear end of the edge of the central opening 22i, and is disposed so as to face this light incident surface with the emission parts of the light emitting elements 23. The plurality of light emitting elements 23 are disposed in an annular shape corresponding to the light incident surface of the edge of the opening 22i.

[0028] The rod portion 21a of the push button 21 can move back and forth along the inner surface of the cylindrical portion 22e of the main body plate 22A, and when the pressing portion on the outer surface of the push button 21 is pressed with a finger, the pressing rod portion 21a moves inward and its rear end face moves the inner protective plate 13 inside the storage case 12 inward, and the rear end of the rod-shaped member 13a of the inner protective plate 13 hits the actuator of the push button switch 11, turning on the switch. Although not particularly limited, the push button 21 is formed from a light-transmitting material, and a portion of the light emitted from the light-emitting element 23 enters the back of the push button 21 and exits from the outer surface, thereby brightening the surface of the push button 21.

[0029] Furthermore, in the transmitter of this embodiment, the entire light guide plate 22B is made of a light-transmitting light guide material such as acrylic resin or polycarbonate resin. Here, the light guide material has a structure in which light-reflecting particles are mixed inside or fine grooves are formed on the back surface, so that the incident light is reflected repeatedly on the front and back surfaces and travels, and part of the light hits the light-reflecting particles or fine grooves on the way and changes direction and is emitted from the front surface side, so that the entire light emits bright light. Also, a part of the light emitted from the light-emitting element 23 may pass through the light guide plate 22B, enter from the back of the push button 21, and exit from the outer surface, causing the surface of the push button 21 to emit light.

[0030] On the other hand, the cover member 22C of the transmitter cover 20 is made of a soft material such as silicone resin that is translucent and can retain its shape, and the surface of this shape-retaining member is covered with a skin 22k made of fabric (woven cloth) made of a material that is flexible, flame-retardant, and elastic. The cover member 22C is formed so as to cover the eaves portion 22j at the outer edge of the light guide plate 22B from the side to the back. As a result, even if an external impact is applied to the cover member 22C, the shape-retaining member deforms to absorb the impact, preventing damage to the surface, and the emission of light from the eaves portion 22j improves visibility from the side of the transmitter. In addition, since the surface of the shape-retaining member is covered with the skin 22k made of woven fabric, the light guided by the light guide plate 22B is diffused or transmitted and emitted to the outside, giving it a soft, vague texture. The surface 22k of the cover member 22C is made of a woven fabric that is woven in a manner that allows it to have a stretchable property. Examples of the material for the woven fabric of the surface include meta-amide fiber, aramid fiber, polyvinyl chloride, vinylidene chloride, modacrylic, etc. Of course, other materials than those mentioned above may be used as long as they meet the required conditions.

[0031] Also, the inner edge of the shape-retaining member of the cover member 22C stops near the outer periphery of the push button 21, but the skin 22k is formed to extend further inward. Then, as shown in FIG. 5, an opening 22m having the same size as the outer diameter of the pressing rod portion 21a of the push button 21 is formed in the center of the skin 22k, and the pressing rod portion 21a is inserted into this opening. This results in a configuration in which the back surface of the flange portion of the push button 21 presses the center of the skin 22k toward the storage case 12. At this time, the skin 22k is pulled inward and stretched, and the tension acts as a force to press the push button 21 outward. As a result, even if a spring for biasing the push button 21 outward is not provided in the storage case 12, it is possible to apply a resistance when the push button 21 is pressed and a force to return the push button 21 to its original position.

[0032] Furthermore, as shown in FIG. 2, when the transmitter cover 20 presses the center of the skin 22k with the back surface of the push button 21, the center of the cover member 22C is recessed toward the storage case 12, and the outer surface of the push button 21 is positioned inward from the most bulging part of the outer surface of the cover member 22C, thereby preventing the push button 21 from being accidentally pressed and the switch being turned on when the transported item hits the transmitter, thereby preventing an erroneous signal from being sent to the receiver. When the pressure from the push button 21 is released and the cover 22k returns to its fixed position due to the tension, the push button switch 11 in the storage case 12 is turned off, but the fire alarm state is self-maintained by the electric circuit provided on the circuit board 14. Therefore, the fire alarm state is maintained even if the push button switch 11 is turned off. The state maintained by the electric circuit on the circuit board 14 is released by a recovery pulse from the receiver.

[0033] 5, in the transmitter of this embodiment, a reinforcing resin portion 22n is provided on the peripheral portion of the skin 22k, and a circular light-shielding portion 22p is provided around the central opening 22m of the skin 22k to weaken the light from the light-emitting portion 22. By providing the light-shielding portion 22p around the central opening 22m of the skin 22k, as described above, when the push button 21 is made of a light-transmitting material and the light-emitting portion 22 is disposed inside, the light-shielding portion 22p can weaken the light from the light-emitting portion 22, thereby preventing the light emission intensity of the protective plate from becoming too strong and achieving a good light emission balance of the entire transmitter. In the embodiment of FIG. 5, the light-shielding portion 22p is set to have a shape and size that is approximately the same as the shape and size of the pressing portion of the push button 21. However, the shape and size of the light-shielding portion 22p do not need to be the same as the shape and size of the pressing portion, and the size, pattern design, color, etc. may be adjusted taking into consideration the translucency and design.

[0034] In this embodiment, the reinforcing resin portion 22n and the light shielding portion 22p are both formed by applying or printing a resin adhesive or an ultraviolet curing resin onto the skin 22k, and then solidifying or curing the resin. In addition, although not particularly limited, the light-shielding portion 22p has a first pattern 22p1 arranged at the edge of the opening 22m, the layer thickness of which is increased to reduce the light transmittance, and a second pattern 22p2, the layer thickness of which is reduced compared to the first pattern, arranged so as to surround the first pattern 22p1, the light transmittance of which is increased. In other words, the thickness of the resin layer serves as a means for adjusting the light transmittance, and by increasing the layer thickness of the first pattern 22p1, the first pattern 22p1 also functions as a reinforcing portion. It is desirable that the diameter of the second pattern 22p2 is the same as or slightly larger than the diameter of the push button 21. In addition to the above-mentioned "layer thickness," there is also a method of adjusting the color of the attached resin as a means of adjusting the light transmittance. For example, since the light transmittance differs depending on the color, it is possible to adjust the light transmittance by the resin color, including transparent colors (clear red, blue, yellow, etc.), without creating a sense of incongruity in appearance, by printing and attaching the resin to the back surface of the skin. In addition, even when printing on the surface of the skin, a pattern with an ingenious design may be used, for example, a pattern such as dots or a color different from the skin (for example, black).

[0035] Specific examples of the resin material forming the reinforcing resin portion 22n on the periphery of the skin 22k and the light-shielding portion 22p around the central opening 22m include, for example, silicone resin, cellulose resin, alkyd resin, acrylic resin, polyurethane resin, polyester resin, gum arabic, glue, etc. By using a resin that forms the light-shielding portion 22p colored in the same color as the skin 22k, it is possible to eliminate visual discomfort. Instead of applying or printing the resin adhesive or ultraviolet curing resin, for example, a film-like sheet may be printed with a predetermined material in a predetermined shape, and the printed surface may be placed against the skin material, and heat and pressure may be applied to attach the reinforcing material in the predetermined shape. Also, it is preferable to apply or print the resin adhesive or ultraviolet curing resin on the back surface of the skin 22k, which makes it possible to adjust the brightness of the front side of the push button 21 without impairing the texture of the woven fabric of the skin 22k.

[0036] Furthermore, as described above, the reinforcing resin portion 22n is formed on the periphery of the skin 22k, and the first pattern 22p1 having a large layer thickness is provided on the edge of the central opening 22m of the skin 22k, so that the threads constituting the woven fabric are less likely to fray. As a result, the central area and peripheral area of ​​the skin 22k can be prevented from being deformed when the push button 21 is pressed. In addition, when the push button 21 is pressed and the rod portion 21a moves, it is possible to prevent the frayed threads from entering the gap between the rod portion 21a and the cylindrical portion 22e of the main body plate 22A and causing malfunction.

[0037] 6(A) and (B) show other pattern examples of the light-shielding portion 22p provided around the opening 22m at the center of the skin 22k. Of these, Fig. 6(A) shows the light-shielding portion 22p configured as a gradation pattern made up of multiple dots, and Fig. 6(B) shows the light-shielding portion 22p configured as a multiple radial pattern that narrows toward the outside. By providing the light-shielding portion 22p with such a pattern, the design of the transmitter can be improved and the part to be pressed to turn on the push button switch can be easily understood. In addition to the above-mentioned dot method, the gradation can be achieved by overlapping long and short lines, wide and narrow lines, overlapping polygons, multicoloring, color changes, etc.

[0038] In the embodiment shown in FIG. 5, it is also possible to omit the reinforcing resin portion 22n at the periphery of the skin 22k and the first pattern 22p1 of the light blocking portion 22p, and provide only the second pattern 22p2. Although the process of applying resin to the edge and periphery of the central opening 22m of the skin 22k can be performed after cutting the woven fabric that forms the skin 22k, in this embodiment, the resin is applied or printed in a wide area along the cutting line of the rectangular woven fabric before cutting, and after solidifying or curing, the woven fabric is cut along the cutting line to form the circular skin 22k. This makes it easy to cut the woven fabric with a cutter and prevents fraying of the woven fabric during cutting.

[0039] Next, a method for fastening the outer edge of the skin 22k made of woven fabric constituting the cover member 22C will be described with reference to Figs. The peripheral portion of the skin 22k is sewn into a bag shape as shown in Fig. 3, and a ring-shaped elastic body 25 made of a circular rubber string or a ring spring as shown in Fig. 4 is housed inside the bag-shaped sewn portion. The diameter of the ring-shaped elastic body 25 in its natural state is set to be sufficiently smaller than the diameter of the light guide plate 22B.

[0040] 3, the peripheral portion of the skin 22k covers the side of the canopy portion 22j at the outer edge of the light guide plate 22B and is folded back to the back. At this time, the ring-shaped elastic body 25 is in a stretched state, so that the peripheral portion of the skin 22k is squeezed toward the center by the force of the ring-shaped elastic body 25 trying to shrink, and tension is applied to the skin 22k. As a result, the skin 22k can fix the shape-retaining member of the cover member 22C and the light guide plate 22B to the outer surface of the main plate 22A.

[0041] As described above, in the transmitter with indicator lamp of this embodiment, the light emitted from the light emitting element 23 enters the light entrance surface near the central opening of the light guide plate 22B, travels through the cone-shaped portion 22b, and is reflected outward when it reaches the outer surface of the cover, causing the entire outer surface of the transmitter cover 20 to emit bright light. Also, part of the light that has traveled through the cone-shaped portion 22b of the light guide plate 22B is emitted toward the center, enters the inside through the flange of the push button 21, and is emitted from the outer surface.

[0042] As a result, the entire outer surface of the cover member 22C and the entire outer surface of the push button 21 emit light. Therefore, visibility from the outer side is good without increasing the diameter of the outer cover. In addition, light that enters the light guide plate 22B of the transmitter cover 20 is also emitted from the surface of the visor portion provided on the outer periphery, i.e., the outer periphery of the transmitter cover 20. Therefore, visibility from the side of the transmitter is also good. Furthermore, in the transmitter with indicator light of this embodiment, the outer surface of the cover member 22C is curved and nearly flat, so it does not protrude outward as much as conventional bullet-shaped indicator lights, which has the advantage of not interfering with movement when transporting equipment.

[0043] Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-mentioned embodiments. For example, in the above-mentioned embodiment, the skin 22k of the cover member 22C of the transmitter cover 20 is pulled inward and stretched, and the tension acts as a force to push the push button 21 outward. However, the shape-retaining member of the cover member 22C may be formed of an elastic material, and when the center of the skin 22k is pressed inward by the push button 21, the shape-retaining member is deformed, and the elastic restoring force of the shape-retaining member provides a force to return the push button 21 to its original state. In addition, in order to supplement the force to return the push button 21 to its original state, a compression spring that urges the push button 21 forward may be arranged in the storage case 12 at a position indicated by the dashed lines B1 and B2 in FIG. 2.

[0044] In the above embodiment, a bag-shaped sewn portion is provided on the periphery of the skin 22k of the cover member 22C, and a ring-shaped elastic body is housed therein to squeeze the bag-shaped sewn portion inward by its elastic force, thereby attaching the cover member 22C to the main plate 22A and the light guide plate 22B, but the cover member 22C may be fixed to the main plate 22A by thermocompression bonding, or a hook for hanging the skin 22k may be provided on the main plate 22A. Also, a string may be passed through the bag-shaped sewn portion instead of a ring spring to squeeze the skin, or the edge of the skin 22k may be fixed to the main plate 22A with a stapler, nail, or screw, or the skin may be fixed to the main plate 22A with an adhesive tape such as double-sided tape or an adhesive.

[0045] In addition, in the above embodiment, the transmitter cover 20 is circular, but it may be elliptical or polygonal. Furthermore, in the above embodiment, the present invention has been described as being applied primarily to a fire transmitter that constitutes a fire alarm system, but the present invention is not limited to fire transmitters and can be widely used in train emergency alert transmitters installed on station platforms and at railroad crossings, and emergency call transmitters installed in toilets, bathrooms, etc. [Explanation of symbols]

[0046] 10 Transmitter body 11 Push button switch 12 Storage case 12a Flange-shaped plate portion 12b Engagement claw 13 Inner protection plate 14 Circuit Board 15 Terminal block 16 Guide member 20 Transmitter cover (outer cover) 21 Push button (outer protective plate) 21a Rod section 21b Groove 22 Light emitting part 22A Body Plate 22B Light guide plate 22C Cover material 22a Inner flat part of main plate 22b Cone-shaped portion of main plate 22c Outer flat part of main plate 22d Main plate eaves 22e Cylindrical part of the main plate 22f locking claw 22h engaging claw 22i aperture 22j Eaves 22k epidermis 22m opening 22p1,22p2 Light shielding part 23 Light emitting element (LED) 24 Bag-shaped sewing part 25 Ring-shaped elastic body (ring spring)

Claims

1. A transmitter comprising: a main body having a built-in push button switch that is turned on by pressing from the outside; an outer cover disposed on the outside of the main body; and a protective plate disposed outside the push button switch, the protective plate having a rod portion on a back surface thereof and made of a light-transmitting material, the rod portion being configured to turn on the push button switch when the protective plate is pressed in, A light source is disposed inside the protective plate, the outer cover includes a skin attached to an outer surface, and an opening is formed inside in which the protective plate is disposed; A transmitter characterized in that an opening is formed in the skin that is larger than the cross section of the rod portion and smaller than the diameter of the pressing portion of the protective plate, and a light-shielding portion made of a resin layer is provided around the opening.

2. The light-shielding portion is formed of a resin layer bonded to the back surface of the skin, 2. The transmitter according to claim 1, wherein the size of the light blocking portion is at least the same as the size of the pressing portion of the protection plate.

3. The skin is formed of a woven fabric, the light-shielding portion includes a first pattern portion made of a resin layer formed on an edge portion of the opening, and a second pattern portion made of a resin layer formed on an outer side of the first pattern portion, 3. The transmitter according to claim 2, wherein the resin layer of the first pattern portion has a lower light transmittance than the resin layer of the second pattern portion.

4. 2. The transmitter according to claim 1, wherein the light blocking portion is made of a resin layer and is formed to have a gradation.

5. 4. The transmitter according to claim 3, wherein the light blocking portion is formed in a radial pattern made of a resin layer.

6. 6. The transmitter according to claim 1, wherein the resin layer is attached to the skin at least before cutting the skin to form the opening.

Images