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WO2020004031A1 - Alarme - Google Patents

Alarme Download PDF

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Publication number
WO2020004031A1
WO2020004031A1 PCT/JP2019/023237 JP2019023237W WO2020004031A1 WO 2020004031 A1 WO2020004031 A1 WO 2020004031A1 JP 2019023237 W JP2019023237 W JP 2019023237W WO 2020004031 A1 WO2020004031 A1 WO 2020004031A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
sound
output unit
sound output
space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/023237
Other languages
English (en)
Japanese (ja)
Inventor
佳武 島田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to EP19826379.0A priority Critical patent/EP3816990B1/fr
Publication of WO2020004031A1 publication Critical patent/WO2020004031A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke

Definitions

  • the present disclosure relates generally to alarms. More particularly, the present disclosure relates to an alarm device that issues an alarm by generating a sound.
  • Patent Document 1 discloses a fire detector (alarm).
  • the fire detector is provided with a speaker that reports occurrence of a trouble.
  • the housing of the fire detector includes a body, a front cover, and a rear cover, and the front cover has a sound hole for emitting sound from a speaker disposed on the rear side of the front cover body. It is formed penetrating in the thickness direction.
  • Patent Document 1 there is a sound hole in front of a speaker (sound output unit). This sound hole had a possibility of passing smoke and moisture.
  • the problem is to provide an alarm that can secure the volume while protecting the sound source.
  • the alarm device includes a sound output unit that generates a sound, and a housing that houses the sound output unit.
  • the housing has a hermetic structure, a shielding portion that covers the sound output portion, and one or more transmission portions that transmit sound from the sound output portion to an outside of the housing from an opening in a portion different from the shielding portion. And a ventilation path.
  • FIG. 1 is a perspective view of an alarm device (disaster prevention device) according to one embodiment.
  • FIG. 2 is a front view of the alarm device.
  • FIG. 3 is a schematic sectional view of the alarm device.
  • FIG. 4 is an exploded perspective view of the alarm device.
  • FIG. 5 is another exploded perspective view of the alarm device.
  • FIG. 6 is a perspective view of a partition of the alarm device.
  • FIG. 7 is another perspective view of the partition.
  • FIG. 8 is a sectional perspective view taken along line XX of FIG.
  • FIG. 9 is a sectional perspective view taken along line YY of FIG.
  • FIG. 10 is an explanatory diagram of an introduction path of the alarm device.
  • FIG. 11 is a schematic sectional view of the alarm device of the first modification.
  • FIG. 12 is a perspective view of the alarm device of the second modification.
  • FIG. 13 is an exploded perspective view of the alarm of the second modification.
  • FIG. 14 is another exploded perspective view of
  • FIGS. 1 and 2 show an alarm device 10 according to an embodiment.
  • the alarm 10 is a kind of disaster prevention equipment.
  • the alarm device 10 is a disaster prevention device that issues an alarm when smoke generated by a fire or the like is detected.
  • a disaster prevention device detects the smoke and, for example, outputs an alarm sound or issues an alert by linking with another device by a communication function.
  • the “disaster prevention device” in the present disclosure is a device installed in a facility for the purpose of, for example, preventing a disaster such as a fire, preventing damage from being damaged, or recovering from a disaster.
  • the disaster prevention device when the disaster prevention device has an alarm function for issuing an alarm, it is also called an alarm device.
  • the disaster prevention device has a detection function of detecting a target substance, it is also called a sensor.
  • the disaster prevention equipment may have both an alarm function and a detection function, and in this case, it may be called a sensor or an alarm.
  • facilities in which such disaster prevention equipment is installed include residential facilities such as apartment houses or detached houses, and non-residential facilities such as hotels, office buildings, schools, welfare facilities, commercial facilities, theme parks, hospitals or factories. Housing facilities.
  • the alarm 10 is installed in a facility, for example, in a living room, corridor, stairs, or the like of the facility, attached to a ceiling, a wall, or the like.
  • the alarm device 10 includes a sound output unit 30 that generates a sound, and a housing 50 that houses the sound output unit 30.
  • the housing 50 has an airtight structure and has a shielding portion 61c that covers the sound output portion 30 and transmits sound from the sound output portion 30 to the outside of the housing 50 through an opening 51 located at a portion different from the shielding portion 61c.
  • the shielding portion 61c is a portion that covers the sound output unit 30 in the housing 50, and has an airtight structure. Therefore, protection of the sound output unit 30, which is a sound generation source, can be expected. As an example, the sound output unit 30 can be protected from smoke, moisture, and the like by the shielding portion 61c. Since the shielding part 61c has an airtight structure, the sound from the sound output unit 30 is not directly transmitted. However, since the housing 50 has the ventilation path P11, the sound from the sound output unit 30 can be transmitted to the outside of the housing 50 from the opening 51 located at a portion different from the shielding portion 61c. Therefore, the volume can be secured. As described above, according to the alarm 10, the sound volume can be secured while protecting the sound generation source (the sound output unit 30).
  • FIG. 3 is a schematic cross-sectional view of the alarm 10 only, and the dimensions of each component of the alarm 10 are different from those of other drawings such as FIG. .
  • the alarm device 10 includes a circuit block 20 and a housing 50, as shown in FIGS.
  • the alarm 10 includes an operation button 90 and a battery 100.
  • the battery 100 it is not essential that the battery 100 is included in the components of the alarm device 10. That is, the alarm 10 does not necessarily need to include the battery 100.
  • the circuit block 20 includes a sound output unit 30 and a sensing unit 40.
  • the sound output unit 30 is a device for generating a sound. More specifically, the sound output unit 30 is an electroacoustic transducer that outputs a sound (sound wave) by receiving an electric signal. Examples of the electro-acoustic transducer include a speaker and a buzzer. In the present embodiment, the sound output unit 30 includes the diaphragm 31.
  • the sound output unit 30 has a disk shape as a whole.
  • the diaphragm 31 has a disk shape.
  • the sensing unit 40 is a device for detecting a target substance.
  • the target substance is smoke.
  • the target substance is not limited to smoke, but may be carbon monoxide, carbon dioxide, or another gas. That is, the target substance may be a substance that is desired to be detected for disaster prevention. Such a target substance can be appropriately selected depending on the type of the disaster prevention equipment.
  • the sensing unit 40 has a sensing space S11, and is configured to detect a target substance in the sensing space S11. More specifically, as shown in FIG. 10, the sensing unit 40 includes a case 41, a light emitting element 42, and a light receiving element 43.
  • the case 41 has a hollow disk shape.
  • the case 41 is made of a synthetic resin.
  • the case 41 is, for example, a molded product made of a synthetic resin. Further, the inner space of the case 41 becomes the sensing space S11.
  • the case 41 includes a plurality of passages 411 that connect the space on the side of the case 41 and the sensing space S11. Each of the plurality of passages 411 has a bent shape. Accordingly, the target substance is taken into the sensing space S11 from outside the case 41 while suppressing light from entering the sensing space S11 from outside the case 41.
  • the light emitting element 42 and the light receiving element 43 are housed in a case 41 as shown in FIG.
  • the sensing unit 40 senses smoke based on a change in the amount of light reflected by the smoke in the sensing space S11 or the amount of light transmitted through the sensing space S11.
  • the light emitting element outputs light toward the sensing space S11.
  • the light receiving element 43 is disposed at a position where direct light from the light emitting element 42 does not enter and at which light scattered by smoke in the sensing space S11 enters. Thus, in a state where no smoke exists in the sensing space S11, the light receiving element 43 does not receive the light output from the light emitting element 42. In a state where smoke exists in the sensing space S11, the light receiving element 43 receives light (scattered light) output from the light emitting element 42 and scattered by the smoke.
  • the sensing unit 40 smoke existing in the sensing space S ⁇ b> 11 can be sensed according to the light receiving state of the light receiving element 43.
  • the light emitting element 42 is, for example, a light emitting diode (LED: Light Emitting Diode).
  • the light receiving element 43 is, for example, a photodiode (PD: Photodiode).
  • the circuit block 20 further includes a printed wiring board 21 and one or more electronic components 22 including switches, as shown in FIGS.
  • the electronic component 22 is mounted on the printed wiring board 21.
  • the sensing unit 40 is mounted on the printed wiring board 21.
  • the sound output unit 30 and the battery 100 are electrically connected to the printed wiring board 21 via electric wires or the like.
  • a control circuit is configured by the printed wiring board 21 and one or more electronic components 22.
  • the control circuit controls the sound output unit 30 based on an output from the sensing unit 40, for example. More specifically, the control circuit gives an electric signal to the sound output unit 30 to generate a sound when the detection unit 40 detects smoke.
  • the housing 50 houses the circuit block 20 (including the sound output unit 30 and the sensing unit 40).
  • the housing 50 houses the operation button 90 and the battery 100.
  • the housing 50 has a disk shape that is circular in plan view.
  • the housing 50 is fixed to a construction surface (for example, a ceiling surface).
  • the casing 50 is not directly fixed to the construction surface, but is fixed indirectly to the construction surface by being fixed to the mounting base fixed to the construction surface. You. Of course, the housing 50 may be directly fixed to the construction surface.
  • the housing 50 includes a first cover 60, a second cover 70, and a partition 80, as shown in FIGS.
  • the first cover 60 is a front portion
  • the second cover 70 is a rear portion. That is, in the alarm 10, it is assumed that the second cover 70 is used directly or indirectly fixed to the enforcement surface.
  • the first cover 60, the second cover 70, and the partition 80 are made of a synthetic resin.
  • the first cover 60, the second cover 70, and the partition 80 are molded products made of synthetic resin, for example.
  • the first cover 60 includes a front wall (first wall) 61 and a peripheral wall (first peripheral wall) 62, as shown in FIGS.
  • the front wall 61 has a plate shape.
  • the front wall 61 has a circular plate shape.
  • the peripheral wall 62 protrudes from the peripheral edge of the front wall 61 toward the second cover 70.
  • the peripheral wall 62 has a circular cylindrical shape.
  • the front wall 61 has a concave portion (first concave portion) 63 on a surface (rear surface, upper surface in FIG. 3) facing the inside of the housing 50 (rear surface, which is partially thinned).
  • the front wall 61 includes a predetermined portion (first predetermined portion) 61a forming the concave portion 63, and a peripheral portion (first peripheral portion) 61b surrounding the predetermined portion 61a.
  • the predetermined portion 61a is a circular portion
  • the peripheral portion 61b is an annular portion.
  • the predetermined portion 61a corresponds to a central portion of the front wall 61.
  • the concave portion 63 is located at the center of the rear surface of the front wall 61.
  • the thickness of the predetermined portion 61a gradually changes. More specifically, the predetermined portion 61a gradually becomes thinner from the edge of the predetermined portion 61a toward the center.
  • the surface of the front wall 61 facing the inside of the housing 50 has a larger curvature than the surface of the front wall 61 facing the outside of the housing 50 (front surface) at least in the predetermined portion 61a.
  • the predetermined portion 61a and the peripheral portion 61b have the same curvature on the front side of the front wall 61, but have a larger curvature on the rear side than on the peripheral portion 61b. Thereby, the concave portion 63 is formed.
  • the contour of the rear surface of the predetermined portion 61a when the predetermined portion 61a has the same curvature on the rear surface side as the peripheral portion 61b (that is, when the front wall 61 is not partially thin) is indicated by a two-dot chain line.
  • L60 indicates a state in which the thickness of the predetermined portion 61a does not decrease until t11 and remains at t12, which is the same as the peripheral portion 61b. Due to the presence of the recess 63, it is possible to expand the space available for housing the circuit block 20 in the housing 50. In the present embodiment, as shown in FIGS.
  • a part of the circuit block 20 (a part of the electronic component 22 a) is in the recess 63. Therefore, an increase in the size of the housing 50 (in particular, an increase in the thickness of the housing 50) can be suppressed. That is, according to the alarm device 10, the size of the alarm device 10 can be reduced.
  • the front wall 61 has a shielding part 61c that covers the sound output unit 30, as shown in FIGS.
  • the shielding portion 61c is a portion of the front wall 61 that faces the sound output unit 30.
  • the shielding portion 61c extends over the predetermined portion 61a and the peripheral portion 61b.
  • the front wall 61 does not have an opening at the shielding portion 61c. That is, the shielding portion 61c has an airtight structure.
  • the shielding portion 61c has a shape that does not easily function as a cone or a diaphragm with respect to the sound from the sound output unit 30. That is, the shielding portion 61c does not have a structure that amplifies vibration.
  • the shielding portion 61c transmits the sound pressure of the sound (see the arrow P12 in FIG. 3) that propagates from the sound output portion 30 to the outside of the housing 50 through the shielding portion 61c, and transmits the sound pressure from the sound output portion 30 to the ventilation path P11 ( (See FIG. 3).
  • the ventilation path P11 will be described later in detail.
  • the first cover 60 has a tubular portion 64 as shown in FIG.
  • the cylindrical portion 64 protrudes from the shielding portion 61c to the sound output unit 30 side.
  • the cylindrical portion 64 contacts the sound output portion 30 protruding from the shielding portion 61c over the entire circumference (see FIGS. 3 and 9).
  • the tube portion 64 is a circular tube.
  • the sound output unit 30 faces the diaphragm 31 toward the front wall 61, and the cylinder 64 hits the sound output unit 30 so as to surround the diaphragm 31.
  • the tube portion 64 has an airtight structure.
  • the cylindrical portion 64 constitutes a closed box together with the shielding portion 61c. In other words, a closed space S12 is formed in front of the sound output unit 30. Thereby, improvement of the acoustic characteristics of the alarm 10 can be expected.
  • the first cover 60 has an opening 65 in the front wall 61.
  • the opening 65 is formed to expose the operation button 90.
  • the opening 65 has a circular shape.
  • the operation button 90 is a member for operating a switch of the circuit block 20.
  • the operation button 90 is movable with respect to the first cover 60 along the thickness of the front wall 61.
  • the operation buttons 90 are made of synthetic resin.
  • the operation button 90 is, for example, a molded product made of a synthetic resin.
  • the second cover 70 includes a rear wall (second wall) 71 and a peripheral wall (second peripheral wall) 72, as shown in FIGS.
  • the rear wall 71 is plate-shaped.
  • the rear wall 71 has a circular plate shape.
  • the peripheral wall 72 protrudes from the peripheral edge of the rear wall 71 to both the first cover 60 side and the opposite side to the first cover 60.
  • the peripheral wall 72 has a circular cylindrical shape.
  • the rear wall 71 has a concave portion (second concave portion) 73 on a surface (a front surface, the lower surface in FIG. 3) facing the inside of the housing 50 (the front surface, the lower surface in FIG. 3). ing.
  • the rear wall 71 includes a predetermined portion (second predetermined portion) 71a forming the concave portion 73, and a peripheral portion (second peripheral portion) 71b surrounding the predetermined portion 71a.
  • the predetermined portion 71a is a circular portion
  • the peripheral portion 71b is an annular portion. In the present embodiment, the predetermined portion 71a is located at a position shifted from the central portion of the rear wall 71.
  • the thickness of the predetermined portion 71a is not different from the thickness of the predetermined portion 61a and is uniform.
  • the predetermined portion 71a is thinner than the peripheral portion 71b, but protrudes outward of the housing 50 from the peripheral portion 71b.
  • the concave portion 73 is formed by the predetermined portion 71a being thinner than the peripheral portion 71b.
  • the outline of the front surface of the predetermined portion 71a when the predetermined portion 71a has the same thickness as the peripheral portion 71b (that is, when the rear wall 71 is not partially thin) is indicated by a two-dot chain line L70. ing.
  • the two-dot chain line L70 indicates a state where the thickness of the predetermined portion 71a is not t21 but remains at t22 which is the same as the peripheral portion 71b. Due to the presence of the recess 73, it is possible to expand the space available for housing the circuit block 20 in the housing 50. In the present embodiment, as shown in FIGS.
  • a part of the circuit block 20 (a part of the sensing unit 40) is in the recess 73. Therefore, an increase in the size of the housing 50 (in particular, an increase in the thickness of the housing 50) can be suppressed. That is, according to the alarm device 10, the size of the alarm device 10 can be reduced.
  • the second cover 70 has a wall (second wall) 74.
  • the wall portion 74 is formed on a surface of the rear wall 71 facing the inside of the housing 50.
  • the wall portion 74 forms a part of a specific guide wall 87a described later.
  • the second cover 70 has an opening 75 in the rear wall 71.
  • the opening 75 is formed for removing the battery 100.
  • the opening 75 has a rectangular shape.
  • the second cover 70 has a plurality of mounting claws 76 on the rear wall 71.
  • the plurality of mounting claws 76 protrude from a surface of the rear wall 71 facing the outside of the housing 50.
  • the plurality of attachment claws 76 are used to attach the alarm 10 to the above-described attachment base.
  • the partition 80 is disposed between the first cover 60 and the second cover 70 as shown in FIG.
  • the partition 80 defines a space between the first cover 60 and the second cover 70 as a first space S51 between the first cover 60 and the partition 80 and a second space between the second cover 70 and the partition 80. Partition into space S52.
  • the partition 80 includes a partition plate 81 as shown in FIGS. 6 and 7.
  • the partition plate 81 has a circular plate shape.
  • the partition plate 81 is sized to fit within the peripheral wall 62 of the first cover 60.
  • the partition plate 81 entirely covers the opening of the peripheral wall 62 as shown in FIGS.
  • the surface of the partition plate 81 on the side of the second cover 70 is generally on the same plane as the surface that is the tip of the peripheral wall 62.
  • the partition 80 includes an opening 82, a holding portion 83, a battery storage portion 84, a plurality of through holes 85, and a plurality of support portions 86.
  • the opening 82, the holding portion 83, the battery housing portion 84, the plurality of through holes 85, and the plurality of support portions 86 are formed on the partition plate 81.
  • the opening 82 is a hole that allows the sensing unit 40 to protrude toward the second space S52.
  • the opening 82 has a size through which the case 41 of the sensing unit 40 passes.
  • the opening 82 has a circular shape.
  • the printed wiring board 21 and the sound output unit 30 are accommodated in the first space S51, and the sensing unit 40 projects through the opening 82 into the second space S52. Therefore, the sensing unit 40 is housed in the second space S52.
  • the sound output unit 30 and the sensing unit 40 are respectively housed in separate spaces (the first space S51 and the second space S52) partitioned by the partition 80. Thereby, the possibility that the sensing unit 40 is affected by the sound generated by the sound output unit 30 is reduced.
  • the holding unit 83 is a part for housing the sound output unit 30.
  • the holding portion 83 has a bottom 831 having a shape recessed toward the second cover 70 in the partition plate 81.
  • the bottom portion 831 is a facing portion facing the sound output unit 30 in the partition 80.
  • the bottom 831 has elasticity. That is, the thickness and shape of the bottom 831 are set so as to have elasticity.
  • the holding portion 83 has a support protrusion 832 and a plurality of positioning protrusions 833.
  • the support protrusion 832 corresponds to a central portion of the sound output unit 30.
  • the support protrusion 832 protrudes from the bottom 831 toward the first cover 60.
  • the support protrusion 832 has a cylindrical shape.
  • Each of the plurality of positioning projections 833 corresponds to the side surface and the rear surface of the sound output unit 30 at the edge of the sound output unit 30.
  • the plurality of protrusions 833 are arranged so as to surround the sound output unit 30.
  • the plurality of projections 833 hit the side and rear surfaces of the sound output unit 30 to guide the sound output unit 30 to a specified position with respect to the partition plate 81.
  • a space for transmitting the sound from the sound output unit 30 is formed between the sound output unit 30 and the bottom 831 of the holding unit 83.
  • the bottom portion 831 has elasticity. Therefore, the sound output unit 30 can be pressed against the front wall 61 (the cylindrical portion 64) of the first cover 60 at the bottom 831. Therefore, the sound output unit 30 can be stably arranged in the first space S51.
  • the battery housing section 84 is a section for housing the battery 100.
  • the battery housing portion 84 includes a concave portion 841 that is a portion of the partition plate 81 that is concave toward the first cover 60.
  • the recess 841 accommodates a part of the battery 100.
  • the battery housing portion 84 further has a peripheral wall 842 surrounding the battery 100 partially housed in the recess 841.
  • the peripheral wall 842 separates the inside of the battery housing portion 84 from the second space S52. Thus, the battery 100 can be protected from smoke flowing into the second space S52.
  • the plurality of through holes 85 are holes penetrating the partition plate 81.
  • the plurality of through holes 85 connect the first space S51 and the second space S52.
  • the plurality of through holes 85 serve as a sound path from the first space S51 to the second space S52.
  • the plurality of through holes 85 are located at the edge of the partition plate 81.
  • the plurality of through holes 85 are arc-shaped.
  • the plurality of through holes 85 are arranged so as to surround the opening 82. Further, the plurality of through holes 85 include a specific through hole 85 a located on the opposite side of the holding portion 83 with respect to the opening 82.
  • the plurality of support portions 86 support the rear wall 71 of the second cover 70 with respect to the partition plate 81.
  • the plurality of support parts 86 are prismatic.
  • the plurality of support portions 86 determine the distance between the partition plate 81 and the rear wall 71.
  • the peripheral wall 62 and the peripheral wall 72 do not contact each other, and the opening 51 is formed between the peripheral wall 62 and the peripheral wall 72. (See FIGS. 1, 3, 8, and 9).
  • the opening 51 is used to transmit the sound from the sound output unit 30 to the outside of the housing 50. That is, as shown in FIG. 3, the housing 50 transmits the sound from the sound output unit 30 to the outside of the housing 50 from the opening 51 in a portion different from the shielding portion 61 c (that is, the side of the housing 50). It has an air passage P11 for transmission. Therefore, the ventilation path P11 transmits the sound from the sound output unit 30 to the space on the side of the housing 50. In particular, the ventilation path P11 transmits the sound from the sound output unit 30 to the outside of the housing 50 through the first space S51, the through hole 85, and the second space S52. In the present embodiment, the ventilation passages P11 correspond to the through holes 85 one-to-one. That is, there are as many ventilation paths P11 as the number of through holes 85.
  • the sound output unit 30 outputs sound to both the front wall 61 side and the rear wall 71 side.
  • the sound output from the sound output unit 30 to the front wall 61 side propagates through the shielded portion 61c through the closed space S12 and reaches the outside of the housing 50.
  • the sound output from the sound output unit 30 to the rear wall 71 side is transmitted to the first space S51 (particularly, the space between the sound output unit 30 and the bottom 831 and the space between the printed wiring board 21 and the front wall 61). Space), the through hole 85, and the second space S52 to reach the outside of the housing 50.
  • the sound from the alarm 10 is transmitted from the sound output unit 30 to the front wall 61 side, propagates through the shielded portion 61c and reaches the outside of the housing 50 (first sound), and And a sound (second sound) that travels from the output unit 30 to the rear wall 71 side and reaches the outside of the housing 50 through the through hole 85.
  • first sound and the second sound cancel each other, the overall volume of the sound output from the alarm 10 decreases.
  • the plurality of through holes 85 constitute a part of the ventilation path P11. Therefore, in the case 50, the position of the through hole 85 is adjusted.
  • a specific through-hole 85 a among the plurality of through-holes 85 is located on the opposite side of the holding portion 83 with respect to the opening 82, and is located away from the sound output unit 30.
  • the presence of the specific through hole 85a suppresses the first sound and the second sound from canceling each other.
  • the through hole 85 is formed in the partition 80 (partition plate 81) such that the waveform of the first sound and the waveform of the second sound do not have opposite phases at the reference point in front of the housing 50. ing. Thus, a decrease in the volume of the sound from the alarm 10 is suppressed.
  • the opening 51 is also used for introducing smoke into the sensing space S11.
  • the housing 50 has a plurality of introduction paths P13 connecting the sensing space S11 of the sensing unit 40 and the opening 51 of the housing 50 in the second space S52 (see FIGS. 3 and 10).
  • the plurality of introduction paths P13 are defined by a plurality of guide walls 87, as shown in FIG.
  • the peripheral wall 842 of the battery storage unit 84 also defines the introduction path P13 together with the plurality of guide walls 87.
  • a portion of the partition 80 that forms the introduction path P13 is indicated by hatching of dots.
  • the guide wall 87 is directed from the periphery of the partition plate 81 to the sensing unit 40 so as to guide the smoke that has entered the second space S52 from the opening 51 to the sensing space S11.
  • the plurality of through-holes 85 are located on the periphery of the partition plate 81. Therefore, the plurality of through holes 85 include a through hole connected to the introduction path P13. Thereby, the ventilation path P11 and the introduction path P13 share the space between the opening 51 and the through hole 85. Thereby, the ventilation path P11 and the introduction path P13 can be efficiently arranged.
  • the housing 50 includes the plurality of guide walls 87 that define the introduction path P13.
  • the plurality of guide walls 87 are formed on the partition plate 81 of the partition 80 except for a specific guide wall 87a. Some guide walls 87 are formed integrally with the support portion 86.
  • the guide wall 87a is a guide wall that crosses the bottom 831 of the partition 80 (the portion facing the sound output unit 30).
  • the specific guide wall 87 a includes a pair of first wall portions 871 and 871 projecting from the partition 80 toward the second cover 70 and a second wall projecting from the second cover 70 toward the partition 80. And a unit 74.
  • the second wall portion 74 is located between the pair of first wall portions 871, 871.
  • the possibility that the guide wall 87a suppresses deformation of the bottom portion 831 can be reduced.
  • the possibility that the pressing of the sound output unit 30 against the front wall 61 by the bottom portion 831 can be reduced can be reduced.
  • a portion of the guide wall 87a that overlaps the support protrusion 832 is the second wall 74. This can further reduce the possibility that the guide wall 87a suppresses the deformation of the bottom portion 831.
  • the second wall 74 does not contact the bottom 831 as shown in FIG. Therefore, the possibility that the guide wall 87a suppresses the deformation of the bottom portion 831 can be further reduced.
  • the shielded portion 61c is a portion that covers the sound output unit 30 in the housing 50 and has an airtight structure. Therefore, protection of the sound output unit 30, which is a sound generation source, can be expected.
  • the sound output unit 30 can be protected from smoke, moisture, and the like by the shielding portion 61c. Since the shielding part 61c has an airtight structure, the sound from the sound output unit 30 is not directly transmitted. However, since the housing 50 has the ventilation path P11, the sound from the sound output unit 30 can be transmitted to the outside of the housing 50 from the opening 51 provided in a portion different from the shielding portion 61c. Therefore, the volume can be secured. As described above, according to the alarm 10, the sound volume can be secured while protecting the sound generation source (the sound output unit 30).
  • the presence of the recess 63 makes it possible to expand the space available for housing the circuit block 20 in the housing 50.
  • a part of the circuit block 20 (a part of the electronic component 22 a) is in the recess 63. Therefore, an increase in the size of the housing 50 (in particular, an increase in the thickness of the housing 50) can be suppressed.
  • the presence of the concave portion 73 makes it possible to expand the space available for housing the circuit block 20 in the housing 50.
  • a part of the circuit block 20 (a part of the sensing unit 40) is in the recess 73. Therefore, an increase in the size of the housing 50 (in particular, an increase in the thickness of the housing 50) can be suppressed. That is, according to the alarm device 10, the size of the alarm device 10 can be reduced.
  • FIG. 11 shows an alarm device 10A according to a first modification.
  • the alarm device 10A includes a housing 50A different from the housing 50 of the alarm device 10.
  • the housing 50A has a second cover 70A different from the second cover 70 of the housing 50.
  • FIG. 11 is a schematic cross-sectional view of the alarm 10 as in FIG. 3, and the thickness of each component of the alarm 10A is exaggerated for the sake of easy understanding.
  • the second cover 70A has an opening 77 as shown in FIG.
  • the opening 77 is used to transmit the sound from the sound output unit 30 to the outside of the housing 50A, similarly to the opening 51.
  • the opening 77 is provided, for example, at a position overlapping the through hole 85 on the rear wall 71.
  • the opening 77 is used for transmitting the sound from the sound output unit 30 to the outside of the housing 50A. That is, as shown in FIG. 11, the housing 50A transmits the sound from the sound output unit 30 to the outside of the housing 50A from the opening 77 in a portion different from the shielding portion 61c (that is, the rear portion of the housing 50A). Ventilation path P11A. Therefore, the ventilation path P11A transmits the sound from the sound output unit 30 to the space behind the housing 50A. In particular, the ventilation path P11A transmits the sound from the sound output unit 30 to the outside of the housing 50A through the first space S51, the through hole 85, and the second space S52.
  • the opening 77 is provided on the rear wall 71 at a position overlapping the through hole 85. Therefore, the ventilation path P11A corresponds to the through-hole 85 one-to-one. That is, there are as many ventilation paths P11A as the number of the through holes 85.
  • the housing 50A has not only the ventilation path P11 but also the ventilation path P11A. Therefore, the housing 50A transmits the sound from the sound output unit 30 to both the space behind the housing 50A and the space on the side. More specifically, the housing 50A transmits the sound from the sound output unit 30 to the outside of the housing 50A from the openings 51 and 77 located at a portion different from the shielding portion 61c.
  • the opening 77 is also used for introducing smoke into the sensing space S11.
  • the housing 50A has a plurality of introduction paths P13A connecting the sensing space S11 of the sensing unit 40 and the outside of the housing 50A in the second space S52 (see FIG. 11). That is, the housing 50A has not only the introduction path P13 but also the introduction path P13A. Therefore, the case 50A easily introduces smoke into the sensing space S11.
  • Modification 2 12 to 14 show an alarm device 10B according to a second modification.
  • the alarm 10B includes a circuit block 20 and a housing 50B, as shown in FIGS.
  • the alarm 10B includes an operation button 90 and a battery 100.
  • the circuit block 20, the operation button 90, and the battery 100 are the same as those of the alarm device 10, and thus the description is omitted.
  • the housing 50B houses the circuit block 20 (including the sound output unit 30 and the sensing unit 40).
  • the housing 50B houses the operation buttons 90 and the battery 100.
  • the housing 50B has a disk shape that is circular in plan view.
  • the housing 50B includes a first cover 60B and a second cover 70B, as shown in FIGS.
  • the first cover 60B is a front portion
  • the second cover 70B is a rear portion.
  • the first cover 60B and the second cover 70B are made of synthetic resin.
  • the first cover 60B and the second cover 70B are, for example, molded products made of synthetic resin.
  • the first cover 60 ⁇ / b> B includes a front wall (first wall) 610 and a peripheral wall (first peripheral wall) 620 as shown in FIGS. 13 and 14.
  • Front wall 610 is plate-shaped.
  • the front wall 610 has a circular plate shape.
  • the peripheral wall 620 protrudes from the peripheral edge of the front wall 610 toward the second cover 70B.
  • the peripheral wall 620 has a circular cylindrical shape.
  • the front wall 610 is partially thinner and has a concave portion 630 on a surface facing the inside of the housing 50B.
  • the front wall 610 includes a predetermined portion 610a forming the concave portion 630, and a peripheral portion 610b surrounding the predetermined portion 610a.
  • the presence of the concave portion 630 makes it possible to expand the space available for housing the circuit block 20 in the housing 50B. Therefore, an increase in the size of the housing 50B (in particular, an increase in the thickness of the housing 50B) can be suppressed.
  • front wall 610 has shielding portion 610c covering sound output unit 30.
  • the shielding portion 610c is a portion of the front wall 610 that faces the sound output unit 30.
  • the front wall 610 does not have an opening at the shielding part 610c. That is, the shield part 610c has an airtight structure.
  • the first cover 60B has a tubular portion 640.
  • the cylindrical portion 640 protrudes from the shielding portion 610c to the sound output unit 30 side.
  • the cylindrical part 640 contacts the sound output part 30 protruding from the shielding part 610c over the entire circumference.
  • the cylindrical portion 640 is a circular cylindrical shape.
  • the cylindrical portion 640 has an airtight structure.
  • the cylindrical part 640 forms a closed box together with the shield part 610c.
  • the first cover 60B has an opening 650 in the front wall 610.
  • the opening 650 is formed to expose the operation button 90.
  • the opening 650 has a circular shape.
  • the second cover 70B includes a rear wall (second wall) 710 and a peripheral wall (second peripheral wall) 720, as shown in FIGS.
  • the rear wall 710 is plate-shaped.
  • the rear wall 710 has a circular plate shape.
  • the peripheral wall 720 protrudes from the peripheral edge of the rear wall 710 to the side opposite to the first cover 60B.
  • the peripheral wall 720 has a circular cylindrical shape.
  • the second cover 70B includes a circuit housing 730 as shown in FIGS.
  • the circuit housing section 730 is a section for housing the sensing section 40.
  • the circuit housing section 730 has a shape that is recessed on the rear wall 710 on the side opposite to the first cover 60B. Therefore, the circuit block 20 is housed in the housing 50B with the sensing unit 40 positioned inside the circuit housing unit 730.
  • the second cover 70B includes a battery storage section 740 as shown in FIGS.
  • Battery storage section 740 is a section for storing battery 100.
  • Battery storage section 740 includes a portion of rear wall 710 that is recessed toward first cover 60B.
  • the second cover 70B includes a plurality of support portions 750.
  • the plurality of support portions 750 support the front wall 610 of the first cover 60B with respect to the second cover 70B.
  • the plurality of support portions 750 have a prism shape.
  • the plurality of supports 750 determine a distance between the front wall 610 and the rear wall 710. Regarding the distance between the front wall 610 and the rear wall 710 and the dimensions of the peripheral wall 620 and the peripheral wall 720, the opening 510 is formed between the peripheral wall 620 and the peripheral wall 720 without the peripheral wall 620 and the peripheral wall 720 being in contact with each other. (See FIG. 12).
  • the second cover 70B has a plurality of mounting claws 760 on the rear wall 710.
  • the plurality of mounting claws 760 protrude from a surface of the rear wall 710 facing the outside of the housing 50B.
  • the plurality of mounting claws 760 are used to mount the alarm 10B to the above-described mounting base.
  • the opening 510 described above is used for transmitting the sound from the sound output unit 30 to the outside of the housing 50B. That is, as shown in FIG. 12, the housing 50B transmits the sound from the sound output unit 30 to the outside of the housing 50B from the opening 510 in a portion different from the shielding portion 610c (that is, a side portion of the housing 50B). It has a ventilation path P11B for transmitting. Therefore, the ventilation path P11B transmits the sound from the sound output unit 30 to the space on the side of the housing 50B.
  • the opening 510 is also used to introduce smoke into the sensing space S11.
  • the housing 50B has a plurality of introduction paths P13B that connect the sensing space S11 of the sensing unit 40 and the opening 510 of the housing 50B in the housing 50B (see FIG. 12).
  • the plurality of introduction paths P13B are defined by the plurality of guide walls 770.
  • the guide wall 770 extends from the periphery of the rear wall 710 toward the sensing unit 40 so as to guide the smoke that has entered the housing 50B from the opening 51 into the sensing space S11. As shown in FIG. 13, the plurality of guide walls 770 are formed on the rear wall 710 of the second cover 70B. The plurality of guide walls 770 are formed integrally with some support portions 750.
  • the housing 50B includes the first cover 60B and the second cover 70B. That is, unlike the housing 50, the housing 50B does not include the partition 80. That is, the partition 80 is not essential.
  • each component of the alarm 10 is not limited to the embodiment and can be changed as appropriate.
  • the sound output unit 30 and the sensing unit 40 are not limited to the above example, and can be replaced with a conventionally known device. Further, the circuit block 20 does not necessarily need to include both the sound output unit 30 and the sensing unit 40. For example, the circuit block 20 of the alarm device 10 does not have to include the sensing unit 40. In this case, the introduction path P13 is not necessary. The circuit block 20 does not need to include a switch. In this case, neither the operation button 90 nor the opening 65 is required.
  • the shape of the housing 50 of the alarm device 10 is not limited to the embodiment, and can be changed as appropriate.
  • the housing 50 may be rectangular or polygonal in plan view, instead of circular. That is, similarly, the first cover 60 and the second cover 70 may not be circular in plan view but may be rectangular or polygonal.
  • the plurality of through holes 85, 85a are arranged so as to surround the sensing unit 40.
  • only one through hole 85 may be provided.
  • one through hole 85 may be formed so as to surround the sensing unit 40.
  • the housing 50 only needs to have one or more through-holes 85, and it is not essential to have a plurality of through-holes 85.
  • the shape of the through hole 85 does not need to be a circular arc, but may be a circular shape, a polygonal shape, or any other desired shape.
  • the position of the through hole 85 is not limited to the position of the above-described embodiment, and may be any appropriate position.
  • the housing 50 only needs to have one or more air passages P11, and it is not essential to have a plurality of air passages P11. Further, in the alarm device 10, the ventilation path P11 and the through hole 85 do not have to correspond one-to-one.
  • the ventilation path P11 may include two or more through holes 85, and the two or more through holes 85 may exist in series or in parallel in the ventilation path P11.
  • the housing 50 has a plurality of introduction paths P13.
  • the housing 50 may have only one introduction path P13.
  • the introduction path P13 and the ventilation path P11 do not need to share the opening 51.
  • the circuit block 20 of the alarm device 10 does not have the sensing unit 40, the introduction path P13 is not necessary.
  • the shielding portion 61c is a part of the front wall 61, but this is only an example. If the sound output unit 30 is arranged to face the rear wall 71, a part of the rear wall 71 may be used as a shielding part. That is, a portion of the housing 50 facing the sound output unit 30 (particularly, a portion of the sound output unit 30 located in front of the diaphragm 31) may be set as the shielding portion.
  • the predetermined portion 61a is gradually thinned from the edge of the predetermined portion 61a toward the center, but may be gradually thinned. However, if the predetermined portion 61a is gradually thinned, the sink during molding is easily suppressed. This facilitates the formation of the housing 50 using the molding technique.
  • the predetermined portion 61a may be thinner than the peripheral portion 61b, and may have a uniform thickness. Further, the surface of the front wall 61 facing the inside of the housing 50 may have a larger curvature than the surface of the front wall 61 facing the outside of the housing 50 as a whole, in addition to the predetermined portion 61a. Further, the first cover 60 may have a plurality of predetermined portions 61a (that is, the concave portions 63).
  • the predetermined portion 71a has a uniform thickness, but may gradually or gradually become thinner from the edge to the center of the predetermined portion 71a.
  • the surface of the rear wall 71 facing the inside of the housing 50 may have at least the curvature of the predetermined portion 71a larger than the surface of the rear wall 71 facing the outside of the housing 50.
  • the second cover 70 may have a plurality of predetermined portions 71a (that is, the concave portions 73).
  • both the front wall 61 and the rear wall 71 do not need to be partially thin. That is, it is sufficient that at least one of the front wall 61 and the rear wall 71 has the recesses 63 and 73 on the surface facing the inside of the housing 50 because the thickness is partially reduced.
  • the first cover 60 does not need to be partially thin. That is, the first cover 60 need not have the concave portion 63.
  • the second cover 70 need not be partially thin. That is, the second cover 70 need not have the concave portion 73.
  • the alarm 10A has both the ventilation path P11 and the ventilation path P11A, but in this case, the ventilation path P11 is not essential. That is, in the alarm device 10A, the housing 50A may not have the opening 51.
  • An alarm device (10; 10A; 10B) includes a sound output unit (30) for generating a sound and a housing (50; 50A; 50B) for housing the sound output unit (30).
  • the housing (50; 50A; 50B) has a shielding part (61c; 610c) and one or more ventilation paths (P11; P11A; P11B).
  • the shielding part (61c; 610c) has an airtight structure and covers the sound output unit (30).
  • the one or more air passages (P11; P11A; P11B) pass the sound from the sound output unit (30) through the opening (51; 77; 510) located at a location different from the shielding site (61c; 610c). It is transmitted to the outside of the housing (50; 50A; 50B). According to the first aspect, it is possible to secure the sound volume while protecting the sound generation source (sound output unit 30).
  • the alarm (10; 10A; 10B) of the second aspect can be realized by a combination with the first aspect.
  • the casing (50; 50A; 50B) projects from the shielding portion (61c; 610c) and is in contact with the sound output unit (30) all around. Having. According to the second aspect, improvement in acoustic characteristics can be expected.
  • the alarm device (10; 10A; 10B) of the third aspect can be realized by a combination with the first or second aspect.
  • the shielding part (61c; 610c) propagates from the sound output unit (30) to the shielding part (61c; 610c) and reaches outside the housing (50; 50A; 50B).
  • the sound pressure of the sound to be made is lower than that in the case of propagating through the one or more ventilation paths (P11; P11A; P11B).
  • improvement in acoustic characteristics can be expected.
  • the alarm device (10; 10A; 10B) of the fourth mode can be realized by a combination with any one of the first to third modes.
  • the housing (50; 50A; 50B) has a first cover (60; 60B) having a front wall (61; 610) and a second cover having a rear wall (71; 71A; 710). (70; 70A; 70B).
  • the shielding part (61c; 610c) is a part of the front wall (61; 610). According to the fourth aspect, it is possible to secure a sound volume while protecting a sound generation source.
  • the alarm (10; 10A; 10B) of the fifth aspect can be realized by a combination with the fourth aspect.
  • the one or more air passages (P11; P11A; P11B) transmit the sound from the sound output unit (30) to a space on the side of or behind the housing (50; 50A; 50B). Transmit to space. According to the fifth aspect, it is possible to secure a sound volume while protecting a sound generation source.
  • the housing (50; 50A) further includes a partition (80) disposed between the first cover (60) and the second cover (70; 70A).
  • the partition (80) includes a first space (S51) between the front wall (61) and the partition (80) and a second space between the rear wall (71; 71A) and the partition (80). It has one or more through holes (85, 85a) connecting to the space (S52).
  • the sound output unit (30) is in the first space (S51). According to the sixth aspect, it is possible to secure the sound volume while protecting the sound generation source.
  • the alarm (10; 10A) of the seventh aspect can be realized by a combination with the sixth aspect.
  • the one or more through-holes (85, 85a) have opposite waveforms of the first sound waveform and the second sound waveform at a reference point in front of the housing (50; 50A).
  • the partition (80) is formed so as not to be formed.
  • the first sound travels from the sound output unit (30) toward the front wall (61), propagates through the shielding part (61c), and reaches the outside of the housing (50; 50A). It is.
  • the second sound travels from the sound output unit (30) toward the rear wall (71; 71A) and passes through the one or more through holes (85, 85a) to form the housing (50; 50A).
  • improvement in acoustic characteristics can be expected.
  • the alarm (10; 10A) of the eighth aspect can be realized by a combination with the sixth or seventh aspect.
  • the one or more air passages (P11; P11A; P11B) transmit the sound from the sound output unit (30) to the first space (S51), the one or more through holes (85, 85a) and through the second space (S52) to the outside of the housing (50; 50A). According to the eighth aspect, it is possible to secure the sound volume while protecting the sound source.
  • the alarm device (10; 10A) of the ninth aspect can be realized by a combination with any one of the sixth to eighth aspects.
  • the opening (51) includes a gap between the second cover (70; 70A) and the first cover (60) and the partition (80).
  • the structure of the housing (50; 50A) can be simplified.
  • the alarm device (10; 10A; 10B) of the tenth aspect can be realized by a combination with any one of the sixth to ninth aspects.
  • the alarm (10; 10A) has a sensing space (S11) and further includes a sensing unit (40) for sensing a target substance in the sensing space (S11).
  • the sensing unit (40) is in the second space (S52). According to the tenth aspect, the possibility that the sensing unit (40) is affected by the sound generated in the sound output unit (30) is reduced.
  • the alarm device (10; 10A; 10B) of the eleventh aspect can be realized by a combination with the tenth aspect.
  • the one or more through holes (85, 85a) surround the sensing unit (40). According to the eleventh aspect, it is possible to secure a sound volume while protecting a sound generation source.
  • the alarm device (10; 10A; 10B) of the twelfth aspect can be realized by a combination with the tenth or eleventh aspect.
  • the housing (50; 50A) has an introduction path (P13; P13A) connecting the sensing space (S11) of the sensing unit (40) and the opening (51; 77).
  • the one or more through holes (85, 85a) include through holes (85, 85a) connected to the introduction path (P13; P13A).
  • the ventilation path (P11; P11A) and the introduction path (P13; P13A) can be efficiently arranged.
  • the alarm device (10; 10A) of the thirteenth aspect can be realized by a combination with the twelfth aspect.
  • a facing portion (831) of the partition (80) facing the sound output unit (30) has elasticity.
  • the sound output section (30) can be stably arranged in the first space (S51).
  • the alarm (10; 10A) of the fourteenth aspect can be realized by a combination with the thirteenth aspect.
  • the housing (50; 50A; 50B) includes one or more guide walls (87) that define the introduction path (P13; P13A; P13B).
  • the one or more guide walls (87) include a specific guide wall (87a) that traverses the opposing portion (831) of the partition (80).
  • the specific guide wall (87a) includes a first wall (871) protruding from the partition (80) toward the second cover (70; 70A; 70B), and the second cover (70; 70A; 70B).
  • the alarm (10; 10A) of the fifteenth aspect can be realized by a combination with the fourteenth aspect.
  • the second wall (74) does not contact the opposing portion (831). According to the fifteenth aspect, it is possible to further reduce the possibility that the guide wall (87a) suppresses deformation of the opposing portion (the bottom portion 831).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)

Abstract

La présente invention vise à protéger une unité de sortie sonore sans compromettre le volume sonore. À cet effet, la présente invention concerne une alarme (10) qui comprend : une unité de sortie sonore (30) pour générer un son et un boîtier (50) pour stocker l'unité de sortie sonore (30). Le boîtier (50) comprend une section de blindage (61c) et un ou plusieurs passages d'air (P11). La section de blindage (61c) a une structure étanche à l'air et recouvre l'unité de sortie sonore (30). Le ou les passages d'air (P11) transmettent le son de l'unité de sortie sonore (30) à l'extérieur du boîtier (50) à travers une ouverture (51) située dans une section différente de la section de blindage (61c).
PCT/JP2019/023237 2018-06-28 2019-06-12 Alarme Ceased WO2020004031A1 (fr)

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EP19826379.0A EP3816990B1 (fr) 2018-06-28 2019-06-12 Alarme

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JP2018123641A JP7165861B2 (ja) 2018-06-28 2018-06-28 警報器
JP2018-123641 2018-06-28

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JP7390539B2 (ja) * 2020-04-21 2023-12-04 パナソニックＩｐマネジメント株式会社 感知器、及び火災報知システム
JP2024120740A (ja) * 2023-02-24 2024-09-05 パナソニックＩｐマネジメント株式会社 煙感知器

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JP2009230546A (ja) * 2008-03-24 2009-10-08 Panasonic Electric Works Co Ltd 火災警報器
JP2011186643A (ja) * 2010-03-05 2011-09-22 New Cosmos Electric Corp 煙感知器
JP2013525897A (ja) * 2010-04-21 2013-06-20 スプルー・セーフティー・プロダクツ・リミテッド 煙感知器
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Also Published As

Publication number Publication date
JP7165861B2 (ja) 2022-11-07
DE202019006052U1 (de) 2024-05-23
JP2022153415A (ja) 2022-10-12
JP7519609B2 (ja) 2024-07-22
JP2020003673A (ja) 2020-01-09
EP3816990A4 (fr) 2021-08-11
EP3816990A1 (fr) 2021-05-05
EP3816990B1 (fr) 2024-02-14

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