Display device of fire alarm system, fire disaster receiver, and fire disaster sensor

Abstract

To provide a display device of a fire alarm system, which is easily visible even under an adverse condition.SOLUTION: A display device of a fire alarm system of the present invention comprises a light-emitting element and an external light-blocking cover, in which the external light blocking cover is installed near the light-emitting element, making light emitted by the light-emitting element easier to see even when an amount of light emitted by the light-emitting element is reduced.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to disaster prevention equipment such as a display device for a fire alarm system, a fire receiver, and a fire detector, and more particularly to disaster prevention equipment having a display device or a display element. [Background technology]

[0002] Generally, a fire receiver in a fire alarm system is provided with a display device using light-emitting elements in the display unit, as described in Patent Document 1. The light-emitting elements of the display device emit light not only when a fire is alerted, but also when a fault occurs in the fire alarm system. Also, as shown in Patent Document 2, a fire detector in a fire alarm system is provided with a display device using light-emitting elements such as a confirmation light. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-23907 [Patent Document 2] Japanese Patent Application Publication No. 2017-182617 Summary of the Invention [Problem to be solved by the invention]

[0004] The light-emitting elements of a display device emit light at a brightness that is visible to the eye. However, in adverse conditions such as an extremely bright environment or when the power supply voltage drops for some reason while exposed to strong light such as external light, the light emitted from the light-emitting elements may be difficult to see.

[0005] An object of the present invention is to provide a display device for a fire alarm system that is easily visible even under adverse conditions. [Means for solving the problem]

[0006] In one embodiment of the present invention, the display device of the fire alarm system is characterized by having a light-emitting element and an external light blocking cover, and by installing the external light blocking cover near the light-emitting element, making it easy to see even when the light emission amount of the light-emitting element is reduced. [Effects of the Invention]

[0007] According to the present invention, the display device of the fire alarm system can be made easily visible even under adverse conditions. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing the device configuration of the fire control receiver of the first embodiment. [Figure 2] FIG. 2 is a front view of the fire control signal receiver having the display device of the first embodiment. [Figure 3] FIG. 1 is a front view of a display device according to a first embodiment. [Figure 4] FIG. 2 is a bottom view of the display device of the first embodiment. [Figure 5] FIG. 10 is a front view of a display device according to a modified example of the first embodiment. [Figure 6] FIG. 10 is a front view of a fire control signal receiver having a display device according to a second embodiment. [Figure 7] 10 is a fire alarm system equipped with the fire detector of Example 3. [Figure 8] FIG. 11 is a longitudinal sectional view of a fire detector having a display device according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0009] Figure 1 shows the device configuration of the fire receiver 1. The fire receiver 1 is connected to a commercial AC power source, which is converted to DC by a power supply circuit 141 and used as the power source for the fire receiver 1. The arrows in Figure 1 indicate the power source for the fire receiver 1. The earth wiring is not shown in Figure 1.

[0010] The internal circuit 14 in the fire receiver 1 in Fig. 1 includes a power supply circuit 141, a secondary battery 142, a control device 143, a voltage measuring device 144, a display driver 145, and a switch 146. The control device 143 has a CPU and memory. The output of the power supply circuit 141 is DC, and becomes the power source for the fire receiver 1 indicated by the arrow via the switch 146. The secondary battery 142 is also connected to the arrow, and the secondary battery 142 also becomes the power source for the fire receiver 1. The voltage measuring device 144 is connected to the output of the secondary battery 142.

[0011] The control device 143 is connected to a voltage measuring device 144, a display driving device 145, and a switch 146. The display driving device 145 is also connected to the light-emitting element 121 and a plurality of light-emitting elements 13. The plurality of light-emitting elements 13 are light-emitting elements other than the light-emitting element 121 in the fire control panel 1 of the first embodiment.

[0012] The control device 143 obtains the output voltage value of the secondary battery 142 by the voltage measuring device 144. It also controls the opening and closing of the switch 146. Furthermore, it supplies current from the display driving device 145 to control the light emission of the light emitting element 121 and the plurality of light emitting elements 13.

[0013] Secondary battery 142 is provided in fire control panel 1 to cope with a power outage of the commercial power supply in the event of a fire or the like. When power is being supplied from the commercial power supply, secondary battery 142 is charged by the DC voltage from power supply circuit 141. When power from the commercial power supply is cut off due to a power outage, power from secondary battery 142 is supplied as a power source for fire control panel 1.

[0014] The secondary battery 142 deteriorates due to aging and other factors. A deteriorated secondary battery 142 cannot provide the required voltage during use, so the fire control device 1 of Example 1 tests the secondary battery 142. When testing the secondary battery 142, the control device 143 opens the switch 146, the voltage measuring device 144 measures the voltage of the secondary battery 142, and the output voltage value is sent to the control device 143. The control device 143 determines whether the secondary battery 142 has deteriorated based on whether the output voltage value is lower than a required voltage value. If the output voltage value is lower than the required voltage value and the secondary battery 142 has deteriorated, the control device 143 causes the display driving device 145 to blink the light-emitting element 121, which is the trouble light. This allows the tester to recognize the deterioration of the secondary battery 142 and replace it.

[0015] Because the secondary battery 142 gradually deteriorates, even if the secondary battery 142 is deteriorated at the time of testing and its output is lower than the specified voltage, a certain level of voltage can still be obtained. Therefore, even if the output voltage of the secondary battery 142 is determined to be deteriorated, it is possible to control the test and cause the light emitting element 121 to emit light. However, a drop in the voltage of the secondary battery 142 may reduce the luminance of the light emitting element 121, which indicates deterioration of the secondary battery 142, making it difficult for the tester to visually recognize the battery. In the fire control device 1, it is technically possible to determine deterioration of the secondary battery 142 even when using a commercial power source. However, due to fire safety regulations, the secondary battery 142 is tested using the secondary battery 142 as a power source without using a commercial power source.

[0016] FIG. 2 shows a front view of the fire receiver 1 equipped with the display device 12 of the first embodiment. A display panel 11 is provided on the front of the fire receiver 1, and various displays are made by the display device 12, light-emitting element 13, and the like provided on the display panel 11. The display device 12 has the light-emitting element 121 shown in FIG. 1 as well as a configuration (external light protection cover) around the light-emitting element 121, which will be described later. The light-emitting element 13 does not have a surrounding configuration like the light-emitting element 121. The light-emitting element 121 serves as a trouble light that emits light to indicate a trouble. During a test of the secondary battery 142, if the output voltage value of the secondary battery 142 is lower than a predetermined voltage value, it is determined that the secondary battery 142 has deteriorated, and the light-emitting element 121, which serves as the trouble light, flashes.

[0017] Fig. 3 shows an enlarged front view of the display device 12, and Fig. 4 shows an enlarged bottom view of the display device 12. Fig. 4 is a view seen from the direction of arrow U in Fig. 3, and shows a cross section of the display panel 11. In Fig. 4, the upper side is the front side of the display panel 11.

[0018] The display device 12 of Example 1 has a light-emitting element 121, an external light blocking cover 122, and an annular cover base 123. The light-emitting element 121 is columnar, and the cover base 123 is cylindrical. As shown in FIGS. 3 and 4 , the annular cover base 123 is fitted into a recess in the display panel 11, and the light-emitting element 121 is fitted inside the cover base 123. The light-emitting element 121 has a light-emitting body and a light-guiding section, and the light-guiding section protrudes slightly forward from the cover base 123. The external light blocking cover 122 is provided around the vicinity of the light-emitting element 121, protruding forward from the cover base 123. The external light blocking cover 122 is formed in an arc shape when viewed from the front. The external light blocking cover 122 is formed integrally with the cover base 123, and a portion of the outermost part of the cylindrical cover base 123 protrudes forward. 3, the cylindrical cover base 123 is provided on the display panel 11 so as to be rotatable around the light emitting element 121. When the cover base 123 rotates and moves, the direction of the external light blocking cover 122 relative to the light emitting element 121 moves. The position of the arc-shaped external light blocking cover 122 can rotate around the center of the arc.

[0019] The direction of external light that obscures the light-emitting element 121 varies depending on the installation situation of the fire receiving device 1. When installing the fire receiving device 1, the cover base 123 is fitted into the recess of the display panel 11 so that the external light blocking cover 122 is oriented in the direction of external light relative to the light-emitting element 121. The outer periphery of the cover base 123 is cylindrical, and the corresponding recess of the display panel 11 is also circular when viewed from the front. Therefore, the external light blocking cover 122 can be installed on the display panel 11 in any direction as seen from the light-emitting element 121. Furthermore, the external light blocking cover 122 is rotatable even after installation, allowing the position to be adjusted after installation of the external light blocking cover 122. This provides appropriate external light blocking, and by installing the external light blocking cover 122 near the light-emitting element 121, the display device 12 of the fire alarm system can be made easily visible even when the power supply voltage drops and the light emission amount of the light-emitting element 121 decreases under strong light exposure. The height of the external light protection cover 122, that is, the amount of protrusion from the display panel 11, is at least approximately the same as the diameter of the light emitting element 121 so as to obtain the effect of blocking external light.

[0020] <Modification> Fig. 5 shows a front view of the display device 22 in a modified example of Example 1. Fig. 5 is a front view of the vicinity of the display device 22 in the fire receiver 2 (not shown). The configuration of the fire receiver 2 is almost the same as that of the fire receiver 1 shown in Figs. 1 and 2, but the display device 22 is different from the display device 12 of the fire receiver 1.

[0021] The display device 22 of the modified example has a light-emitting element 221, an external light blocking cover 222, and a cover base 223. The light-emitting element 221 is cylindrical. As with the display device 12 of Example 1, the display device 22 of the modified example has the cover base 223 fitted into a recess in the display panel 21, and the light-emitting element 221 fitted in the center of the approximately annular cover base 223. The light-emitting element 221 has a light-emitting body and a light-guiding section, and the light-guiding section protrudes slightly forward from the cover base 223. The external light blocking cover 222 is provided around the vicinity of the light-emitting element 221, protruding forward from the cover base 223. The external light blocking cover 222 is formed in an arc shape when viewed from the front, and is provided integrally with the cover base 223.

[0022] The cover base 223 in this modification has the same inner shape as the cover base 123 in Example 1, but its outer periphery has the side surfaces of a decagonal prism. The corresponding recess in the display panel 21 is also decagonal when viewed from the front. Therefore, the external light blocking cover 222 can be attached to the display panel 21 while changing its orientation by 36° in the rotational direction indicated by the arrow T. In this modification, the position of the external light blocking cover 222 is determined when the cover base 223 is attached to the display panel 11. This provides appropriate external light blocking, and by installing the external light blocking cover 222 near the light emitting element 221, the display device 22 of the fire alarm system can be easily viewed even when the light emission amount of the light emitting element 221 is reduced in a state where strong light is shining on it. [Example]

[0023] FIG. 6 shows a front view of a fire receiver 3 equipped with a display device 32 according to a second embodiment. A display panel 31 is provided on the front of the fire receiver 3, and various displays are performed using the display device 32, light-emitting elements 33, and other elements provided on the display panel 31. The display device 32, indicated by a dotted circle in FIG. 6, includes a light-emitting element 322 that emits light when commercial power is being used, a light-emitting element 321 that emits light when a problem occurs, and an external light protection cover 323. The light-emitting element 33 is a display device that does not include an external light protection cover or the like. The external light protection cover 323 is fixed to the display panel 31. The external light protection cover 323 is formed by bending a rectangular plate at one point into an L-shape. The external light protection cover 323 protrudes forward from the display panel 31 and extends from above the light-emitting elements 321 and 322 to the right in FIG. 6. The light-emitting elements 321 and 322 are collectively covered inside the external light protection cover 323.

[0024] The fire receiver 3 of the second embodiment has the same configuration as the fire receiver 1 of the first embodiment shown in Fig. 1, but differs from the fire receiver 1 in the display device 32. In the fire receiver 3, if the voltage of a secondary battery (not shown) is low during a test of the secondary battery, the light-emitting element 321 flashes. Since the commercial power supply is turned off during the test of the secondary battery, the light-emitting element 322, which indicates that the commercial power supply is being used, is turned off.

[0025] In the display device 32 of Example 2, an external light blocking cover 323 collectively covers a plurality of light emitting elements, namely, light emitting elements 321 and light emitting elements 322, which are used when testing a secondary battery. Therefore, even if the power supply voltage drops due to deterioration of the secondary battery, the light emitting states of the light emitting elements 321 and light emitting elements 322 can be easily visually confirmed. The display device 32 of Example 2 is used when the direction of external light that makes the light emitting elements 321 and light emitting elements 322 difficult to see is the upper right side of the fire receiver 3 shown in FIG. 6. As described above, even in Example 2, by providing the external light blocking cover 323 near the light emitting elements 321 and light emitting elements 322, the display device 32 of the fire alarm system can be easily visually confirmed even when the power supply voltage drops and the light emission amount of the light emitting elements 321 and light emitting elements 322 decreases in a state where strong light is shining on them. [Example]

[0026] 7 shows a fire alarm system equipped with a fire detector 4 according to a third embodiment. In the fire alarm system, multiple sets of sensing lines CL are connected to a fire receiver R, and the sensing lines CL are distributed across multiple fire detectors 4. A termination device E is connected to the end of the sensing lines CL. In the third embodiment, a display device 41 is provided in the fire detector 4.

[0027] 8 is a vertical cross-sectional view of a fire detector 4 equipped with a display device 41 of Example 3. As shown in the dotted circle, the fire detector 4 has a display device 41 on the periphery. The display device 41 has a light-emitting element 411 serving as a confirmation light inside a recess that is inclined outward. By being located inside the recess, the light-emitting element 411 is protected from external light, making it easy to see, and the inner wall of the recess is provided with an external light-blocking cover 412.

[0028] 8, the dotted line indicates the central axis C of the recessed portion that is the light-emitting element 411 and the external light protection cover 412. When the fire detector 4 is installed on a horizontal ceiling, the direction of the central axis C of the light-emitting element 411 and the external light protection cover 412 is inclined at an angle θ from the vertical direction P shown by the solid line so that the lower portion faces outward. The angle θ is preferably 15 degrees or more and 45 degrees or less.

[0029] The light-emitting element 411 is a confirmation light that lights up when a fire detector 4 detects a fire, allowing the fire detector 4 that detected the fire to be identified. When many of the fire detectors 4 connected to the same sensing line CL shown in FIG. 7 detect a fire, many of the confirmation lights light up, the amount of current in the sensing line CL increases, and the voltage of the sensing line CL drops. This reduces the amount of current flowing through the light-emitting element 411, and the amount of light emitted decreases. However, because an external light blocking cover 412 is installed near the light-emitting element 411, the light emitted by the display device 41 of the fire alarm system is easy to see even when the amount of light emitted by the light-emitting element 411 decreases when exposed to strong light.

[0030] In the first embodiment, the external light protection cover 122 is rotatable near the light emitting element 121. However, the external light protection cover and the cover base may be integrally formed with the display panel, so that the external light protection cover is fixed in place. Furthermore, the secondary battery 142 shown in the first embodiment is intended to cope with power outages such as fires, and may be a normal battery that cannot be charged. In this case, a long-life normal battery is used, but even long-life batteries will naturally discharge or deteriorate over time, causing a decrease in output voltage, so they are replaced depending on test results.

[0031] The external light blocking cover 412 of Example 3 is a side wall of the recess, but may also be an external light blocking cover that protrudes in an arc shape and is rotatable around the center of the arc as the center of rotation as in Example 1. In the case of an external light blocking cover as in Example 1, when the fire detector is installed on a horizontal ceiling, the direction of the central axis of the external light blocking cover may be such that the lower part is inclined outward at an angle of 15 degrees to 45 degrees from the vertical direction.

[0032] Furthermore, the specific configuration is not limited to the embodiments, and the present invention includes design changes within the scope of the gist of the present invention. Furthermore, the above-mentioned examples and modifications can be combined by utilizing each other's technology as long as there are no particular contradictions or problems in the purpose, configuration, etc. [Explanation of symbols]

[0033] R fire receiver, CL sensing line, E termination device, C center axis, P vertical direction, θ tilt angle, 1 Fire receiver, 11 Display panel, 12 Display device, 121 Light emitting element, 122 External light protection cover, 123 Cover base, 13 Light emitting element, 14 Internal circuit, 141 Power supply circuit, 142 Secondary battery, 143 Control device, 144 Voltage measuring device, 145 Display driving device, 146 Switch, 2 fire receiver, 21 display panel, 22 display device, 221 light emitting element, 222 external light prevention cover, 223 cover base, 3 Fire receiver, 31 Display panel, 32 Display device, 321 Light emitting element, 322 Light emitting element, 323 External light prevention cover, 33 Light emitting element, 4 Fire detectors, 41 Display devices, 411 Light-emitting elements, 412 External light protection covers

Claims

1. A light emitting element and an external light blocking cover are provided, The display device of a fire alarm system is characterized in that the external light blocking cover is installed near the light emitting element, so that the display device is easily visible even when the light emission amount of the light emitting element is reduced.

2. 2. The display device for a fire alarm system according to claim 1, wherein the external light blocking cover is provided in an arc shape and is rotatable around the center of the arc.

3. A display device for a fire alarm system according to claim 1 or 2; a battery; A fire alarm receiver characterized in that, when the battery is tested, the light-emitting element emits light using the battery as a power source.

4. 4. The fire control panel according to claim 3, wherein the external light blocking cover covers a plurality of the light emitting elements collectively.

5. A display device for a fire alarm system according to claim 1 or 2, A fire detector characterized in that the direction of the central axis of the external light protection cover is such that, when installed on a horizontal ceiling, the lower part is inclined outward at an angle of 15 degrees or more and 45 degrees or less from the vertical.

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