Nozzle for dust collecting device, dust collecting device, bellows hose, living body sensor type lighting device, and fire alarm device

The integration of a magnetized dust collector nozzle, a lubricated bellows hose, a biosensing lighting device, and an advanced fire alarm system addresses the challenges of suction power reduction, glare, and fire alarm practicality, resulting in improved performance and safety across these technologies.

JP2025079704APending Publication Date: 2025-05-22松川電器株式会社
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Patent Information

Application Number
JP2023192549
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-11-10
Publication Date
2025-05-22

AI Technical Summary

Technical Problem

Existing dust collectors face issues with suction power reduction and breakdowns due to metallic foreign objects and hair tangling, while automatic lighting devices cause glare, and fire alarm devices lack practicality in activating fire extinguishers and identifying fire causes.

Method used

The implementation of a dust collector nozzle with a magnet between the brush and suction port to attract metallic foreign objects, a bellows hose with a lubricating coating layer to prevent dust adhesion, a biosensing lighting device that adjusts illumination angles to avoid dazzling, and a fire alarm device that automatically activates fire extinguishers and captures images of fires for identification.

Benefits of technology

The solutions enhance the durability and suction efficiency of dust collectors, reduce glare from lighting devices, and improve the practicality and safety of fire alarm systems by preventing breakdowns, attracting foreign objects, and enabling early fire suppression.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a nozzle for a dust collecting device that is less likely to be deteriorated in suction force and to fail, and to provide a dust collecting device and a bellows hose, a living body sensor type lighting device having less glare, and a fire alarm device that is highly practical.SOLUTION: A nozzle for a dust collecting device includes: a brush; a suction port connected to a suction device; and a magnet between the brush and the suction port in a direction of sucking dust that is collected via the brush during dust collection.SELECTED DRAWING: Figure 1
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Description

[Technical field]

[0001] The present invention relates to a nozzle for a dust collector, a dust collector, a bellows hose, a living body sensing lighting device, and a fire alarm device. [Background technology]

[0002] Dust collecting devices with improved suction performance have been known for some time now. As an example of such a dust collecting device, Patent Document 1 describes a vacuum cleaner head that is biased against and adapts to the surface being cleaned in order to maintain a sealed state between the vacuum cleaner head and the surface being cleaned. Furthermore, lighting devices that automatically turn on lights have been known for some time now. As an example of such lighting devices, Patent Document 2 describes an automatic toilet lighting device that can turn on the toilet lights only when necessary without bothering the user and is also less likely to malfunction. Furthermore, fire alarm systems that detect and notify fires have been known for some time. As an example of such a fire alarm system, Patent Document 3 describes a fire alarm device that allows the user to immediately recognize the location of a fire extinguisher even if a fire occurs in a dark place, and is not easily limited to a specific location and can be immediately adapted to a fire extinguisher that has been installed in the past. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2021-511911 [Patent Document 2] JP 2009-272075 A [Patent Document 3] JP 2007-193683 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the inventors of the present invention examined the vacuum cleaner head described in Patent Document 1, they found that metallic foreign objects such as needles and metal pieces contained in dust were sucked in as they were, and that hair got tangled in the brush. They also found that dust and other particles easily adhere to the inner surface of the bellows hose used in vacuum cleaners, etc., resulting in reduced suction power and breakdowns. Furthermore, when the present inventors examined the automatic lighting device described in Patent Document 2, they found that the light hits the eyes and causes glare. Furthermore, when the inventors of the present invention examined the fire warning device described in Patent Document 3, they found that it lacked practicality because it was not possible to activate a fire extinguisher and it was not possible to identify the cause of the fire. The present invention aims to solve such problems, and to provide a dust collector nozzle, a dust collector and a bellows hose that are less likely to lose suction power and break down, a biosensing lighting device that is not dazzling, and a highly practical fire alarm device. [Means for solving the problem]

[0005] As a result of investigations conducted by the present inventors in light of the above problems, the above problems were solved by the following means. <1> A nozzle of a dust collector having a brush and a suction port connected to a suction device, A nozzle of a dust collector, the nozzle having a magnet between the brush and a suction port, in a direction in which dust collected through the brush during dust collection is sucked in. <2> The magnet is disposed at a position 0.1 to 5 cm away from the outermost surface of the brush closest to the dust in the suction direction. <1> A nozzle for a dust collector according to claim 1. <3> The magnetic force of the magnet is 200 to 500 mT. <1> or <2> A nozzle for a dust collector according to claim 1. <4> A dust collector nozzle having a brush, The direction in which dust collected through the brush is sucked during dust collection is perpendicular to the longitudinal direction of the brush, A nozzle of a dust collecting device having a blade parallel to the longitudinal direction of the brush and located 0.5 to 5 cm inward from the outermost surface of the brush. <5> The blade is arranged including a position where the distance between the center of the suction port connected to the suction device and the longitudinal side of the brush is the shortest. <4> A nozzle for a dust collector according to claim 1. <6> A dust collector nozzle having a rotating brush, The direction in which the dust collected through the rotary brush is sucked during dust collection is perpendicular to the rotation axis of the rotary brush, A nozzle of a dust collecting device, the nozzle having a blade parallel to the rotation axis of the rotary brush and located 0.5 to 5 cm inward from the outermost surface of the rotary brush. <7> The blade is arranged including a position where the distance between the center of the suction port connected to the suction device and the rotation axis of the rotary brush is the shortest. <6> A nozzle for a dust collector according to claim 1. <8> <1> ~ <7> A dust collecting device having a nozzle of the dust collecting device described in any one of the above. <9> A bellows hose with a lubricating coating layer on the inside. <10> For air conditioning equipment, dust collection equipment, or cleaning equipment, <9> 3. The bellows hose according to claim 1 . <11> A living body sensing lighting device having a sensing unit that acquires information for identifying a torso of a living body in a target space, an identification unit that identifies the torso of the living body in the target space based on the information acquired by the sensing unit, and a lighting unit that operates based on the information identified by the identification unit, The lighting unit adjusts an illumination angle to illuminate the torso of a living organism. <12> A fire alarm device having a detection unit that detects smoke and / or fire and an illumination unit that illuminates light, A fire alarm device in which, when the sensing unit detects smoke and / or fire, the light emitted from the illumination unit activates a fire extinguisher. <13> A fire alarm device having a detection unit that detects smoke and / or fire, an image capturing unit that captures the smoke and / or fire detected by the detection unit, and a transmission unit that transmits the image captured by the image capturing unit to the outside. <14> The time from when the detector detects smoke and / or fire to when the transmitter transmits the image is more than 0 seconds and less than 5 minutes. <13> A fire alarm device as described above. Effect of the Invention

[0006] The present invention makes it possible to provide a dust collector nozzle, a dust collector, and a bellows hose whose suction power is unlikely to decrease and which are unlikely to break down, a biosensing lighting device that is unlikely to be dazzling, and a highly practical fire alarm device. [Brief description of the drawings]

[0007] [Figure 1] 2A and 2B are a plan view and a cross-sectional view taken along line AA' of a nozzle of the dust collecting device according to the present invention. [Diagram 2] 2A and 2B are a plan view and a cross-sectional view taken along line AA' of a nozzle of the dust collecting device according to the present invention. [Diagram 3] 2A and 2B are a plan view and a cross-sectional view taken along line AA' of a nozzle of the dust collecting device according to the present invention. [Figure 4] 2A and 2B are a plan view and a cross-sectional view taken along line AA' of a nozzle of the dust collecting device according to the present invention. [Diagram 5] 2A and 2B are a plan view and a cross-sectional view taken along line AA' of a nozzle of the dust collecting device according to the present invention. [Figure 6] 2A and 2B are a plan view and a cross-sectional view taken along line AA' of a nozzle of the dust collecting device according to the present invention. [Figure 7] 1 is a schematic diagram of a bellows hose according to the present invention. [Figure 8] 1 is a schematic diagram of a vacuum cleaner, which is an example of a dust collecting device according to the present invention. [Figure 9] 1 is a schematic diagram of a biosensing illumination device according to the present invention; [Figure 10] 1 is a diagram showing a state in which the biosensing illumination device according to the present invention is used; [Figure 11] 1 is a schematic diagram of a fire alarm device according to the present invention; [Figure 12] 1 is a schematic diagram of a fire alarm device according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. Note that the following present embodiment is an exemplification for explaining the present invention, and the present invention is not limited only to the present embodiment. In this specification, "~" is used to mean including the numerical values described before and after it as the lower limit value and the upper limit value. In this specification, various physical property values and characteristic values are assumed to be those at 23°C unless otherwise specified. Also, regarding the descriptions of angles, vertical, parallel, etc. in this specification, an error of ±10° or less is regarded as an error, and the error is preferably ±5° or less, more preferably ±3° or less, and even more preferably ±1° or less. In FIGS. 1 to 12, the scale may not match the actual situation.

[0009] <Nozzle of the dust collector> FIGS. 1(a) and 2(a) show a plan view of the nozzle of the dust collector according to the first embodiment, where 1 is the nozzle of the dust collector, 2 is a brush, 3 is a suction port, 4 is a magnet, and 5 indicates the suction direction. The nozzle 1 of the dust collector according to the present embodiment is characterized in that it has a magnet 4 between the brush 2 and the suction port 3 in the suction direction 5 in which the dust collected through the brush 2 during dust collection is sucked. With such a configuration, it is possible to attach metal foreign matters such as needles and metal pieces contained in the dust to the magnet, and it is possible to provide a nozzle of a dust collector in which a decrease in suction force due to clogging of foreign matters is unlikely to occur and which is less likely to malfunction. Note that the suction port 3 may be directly connected to the suction device or may be connected via a connection part. Examples of the connection part include a connector and the like.

[0010] FIGS. 1(b) and 2(b) show a cross-sectional view taken along line A-A' of the nozzle of the dust collector according to the first embodiment, where 1 is the nozzle of the dust collector, 2 is a brush, 3 is a suction port, 4 is a magnet, 5 is the suction direction, 6 is the outermost surface of the brush, and 7 is the dust. The position of the magnet 4 of the nozzle 1 of the dust collector of this embodiment is preferably 0.1 cm or more, more preferably 0.5 cm or more, even more preferably 1 cm or more, and preferably 5 cm or less, more preferably 4 cm or less, and even more preferably 3 cm or less, from the outermost surface 6 of the brush on the side closer to dust 7 between the brush 2 and the suction port 3. By making the distance equal to or greater than the above lower limit, the magnet is prevented from coming into contact with the brush, and the cleaning area is prevented from being damaged by the magnet during cleaning. Also, by making the distance equal to or less than the above upper limit, foreign matter scattered by the brush can be more effectively attached to the magnet. It is also preferable that the magnet is removable, so that metallic foreign matter adhering to the magnet can be easily collected.

[0011] The magnetic force of the magnet in the nozzle of the dust collector is preferably 200 mT or more, more preferably 250 mT or more, and even more preferably 300 mT or more, and is preferably 500 mT or less, more preferably 450 mT or less, and even more preferably 400 mT or less. By setting the magnetic force to be equal to or greater than the lower limit, the magnet can more effectively collect metallic foreign matter. By setting the magnetic force to be equal to or less than the upper limit, metallic foreign matter adhering to the magnet can be easily removed.

[0012] The type of magnet in the nozzle of the dust collecting device is not particularly limited as long as it has a predetermined magnetic force, and for example, a ferrite magnet, a neodymium magnet, a samarium-cobalt magnet, an alnico magnet, etc. can be used.

[0013] The magnet of the nozzle of the dust collecting device preferably has a curved shape, which can prevent damage to floors, etc. during cleaning. The size of the magnet in the lateral direction (perpendicular to the suction direction) of the nozzle of the dust collector is preferably equal to or smaller than the width of the brush (side perpendicular to the suction direction) and equal to or larger than the diameter of the suction port. By making the size in this way, foreign matter can be more efficiently attracted to the magnet. Furthermore, the size of the magnet in the longitudinal direction (parallel to the suction direction) is not particularly limited as long as it can be placed between the brush and the suction port, and can be any size. Furthermore, the thickness of the magnet is not particularly limited as long as it does not interfere with suction, and can be any thickness.

[0014] 3(a) and 5(a) are plan views of the nozzle of the dust collector of the second embodiment, in which 1 indicates the nozzle of the dust collector, 2' indicates the rotary brush, 3 indicates the suction port, 5 indicates the suction direction, 6 indicates the outermost surface of the brush, 8 indicates the blade, and 9 indicates the rotation axis of the rotary brush. Note that, in the case of a non-rotating brush, the outermost surface 6 of the brush is exemplified as the position closest to the dust collection surface or cleaning surface when dust is collected by the dust collector, and in the case of a rotary brush, it is exemplified as the outer peripheral surface of the brush. The nozzle 1 of the dust collector of this embodiment is characterized in that the suction direction 5 in which dust collected through the rotary brush 2' is sucked in during dust collection is perpendicular to the rotary brush rotation axis 9 (longitudinal direction of the brush), and the blade is parallel to the rotary brush rotation axis 9 (longitudinal direction of the brush) and located 0.5 to 5 cm inside the outermost surface 6 of the brush. With this configuration, when hair contained in dust gets tangled in the brush, the hair can be cut with the blade, making it possible to provide a nozzle of a dust collector that is less likely to experience a decrease in suction power due to hair tangling and is less likely to break down. In addition, hair is less likely to clog the nozzle, etc., making it possible to reduce the effort required for the user to maintain the dust collector.

[0015] Figures 3(b) and 5(b) show a plan view and an A-A' cross-sectional view of the nozzle of the dust collector of the second embodiment, in which 1 indicates the nozzle of the dust collector, 2' indicates the rotary brush, 3 indicates the suction port, 5 indicates the suction direction, 6 indicates the outermost surface of the brush, 8 indicates a blade, and 9 indicates the rotation axis of the rotary brush. The position of the blade 8 of the nozzle 1 of the dust collecting device of this embodiment is preferably 0.5 cm or more from the outermost surface 6 of the brush, more preferably 1 cm or more, and preferably 5 cm or less, more preferably 3 cm or less. By making it equal to or greater than the above lower limit, the blade can be prevented from damaging the floor or the like during cleaning. Also, by making it equal to or less than the above upper limit, hair tangled in the brush can be cut more effectively. In addition, the blade 8 may be movable, i.e., it may be configured to be stored inside the brush during cleaning and to be pulled out to the outermost surface of the brush during maintenance of the dust collection device to cut hair wrapped around the brush.

[0016] The material of the blade of the nozzle of the dust collecting device is not particularly limited, and may be, for example, stainless steel.

[0017] Figures 4 and 6 show the nozzle of the dust collector of the second embodiment, where 1 is the nozzle of the dust collector, 2' is the rotary brush, 3 is the suction port, 3' is the center of the suction port, 6 is the outermost surface of the brush, 8 is the blade, 9 is the rotation axis of the rotary brush, and α indicates the position where the distance between the center 3' of the suction port and the rotation axis 9 of the rotary brush is shortest. The blade 8 of the nozzle 1 of the dust collector of this embodiment is preferably arranged to include a position α where the distance between the center 3' of the suction port connected to the suction device and the rotation axis 9 of the rotary brush (the side in the longitudinal direction of the brush in the case of a non-rotating brush) is the shortest. Collected dust including hair tends to be concentrated and sucked in a position close to the suction port. Therefore, by arranging the blade 8 to include a position α where the distance between the center 3' of the suction port and the rotation axis 9 of the rotary brush is the shortest, hair that tends to get tangled in the brush can be effectively cut.

[0018] The shape and size of the blade of the nozzle of the dust collecting device are not particularly limited as long as they are capable of being placed on a brush and cutting hair, and can be of any shape and size. It is also preferred that the blade is removable, which allows for the blade to be sharpened.

[0019] <Dust collection device> FIG. 8 shows a vacuum cleaner as an example of the dust collecting device of this embodiment, where 40 indicates the vacuum cleaner, 1 indicates a nozzle of the dust collecting device of this embodiment, 10 indicates a bellows hose, and 12 indicates a suction device. The dust collecting device of this embodiment has a dust collecting device nozzle of this embodiment.

[0020] <Bellows hose> FIG. 7 shows the bellows hose of this embodiment, where 10 indicates the bellows hose and 11 indicates the lubricating coating layer. The bellows hose 10 of the present embodiment is characterized in that the inside thereof is provided with a lubricious coating layer 11. With such a configuration, it is possible to prevent dust and the like from adhering to the inside of the bellows hose, and it is possible to provide a bellows hose that is less susceptible to reduced suction power and clogging.

[0021] The thickness of the lubricating coating layer provided on the bellows hose is preferably 10 μm or more, more preferably 20 μm or more, and even more preferably 30 μm or more, and is preferably 100 μm or less, more preferably 70 cm or less, and even more preferably 50 cm or less. By making the thickness equal to or greater than the lower limit, damage to the coating layer due to bending of the bellows hose can be prevented. Also, by making the thickness equal to or less than the upper limit, the flexibility of the bellows hose can be prevented from being impaired.

[0022] The lubricating coating layer provided on the bellows hose is preferably made of a soft material that prevents adhesion of dust and does not impede bending of the bellows hose, such as a fluororesin coating or parylene coating.

[0023] The bellows hose of the present embodiment can be used in an air conditioning device, a dust collecting device, a cleaning device, etc. An example of the air conditioning device is an air conditioner, an example of the dust collecting device is a vacuum cleaner, and an example of the cleaning device is a washing machine.

[0024] <Biosensing lighting device> FIG. 9 shows the living body sensing illumination device of this embodiment, in which 13 indicates the living body sensing illumination device, 14 indicates a sensing unit, 15 indicates an identification unit, 16 indicates an illumination unit, and 30 indicates light. FIG. 10 shows the living body sensing illumination device of this embodiment in use, where 13 indicates the living body sensing illumination device and 17 indicates the torso of a living body. The living body sensing lighting device 13 of this embodiment is characterized by having a sensing unit 14 that acquires information for identifying the torso 17 of a living body in the target space, a discrimination unit 15 that identifies the torso 17 of the living body in the target space based on the information acquired by the sensing unit 14, and a lighting unit 16 that operates based on the information identified by the discrimination unit 15, and the lighting unit 16 adjusts the irradiation angle to irradiate light onto the torso 17 of the living body. With this configuration, it is possible to provide a living body sensing lighting device that is less dazzling to the eyes.

[0025] As the identification unit of the biosensing lighting device of this embodiment, the device described in International Publication No. 2018 / 207292 can be referred to, the contents of which are incorporated herein by reference.

[0026] The living body sensing lighting device of this embodiment can illuminate the area around a person's hands while he or she is working, or can illuminate pets such as dogs and cats.

[0027] <Fire alarm system> FIG. 11 shows a fire alarm system of the first embodiment, in which 18 indicates a fire alarm system, 14 indicates a sensing unit, 19 indicates an irradiation unit, and 20 indicates a fire extinguisher. The fire alarm device 18 of the first embodiment has a sensing unit 14 that senses smoke and / or fire and an irradiating unit 19 that irradiates light, and is characterized in that when the sensing unit 14 senses smoke and / or fire, the light irradiated from the irradiating unit 19 activates the fire extinguisher 20. With this configuration, the fire extinguisher 20 can sense the light irradiated from the irradiating unit 19 and activate the fire extinguisher 20 immediately after the occurrence of a fire. As a result, the fire extinguisher can be automatically operated at an extremely early stage, the spread of the fire can be suppressed, and the fire extinguishing activity can be completed in a short time. In addition, since the fire extinguisher is automatically operated, it is possible to perform fire extinguishing activities safely.

[0028] FIG. 12 shows a fire alarm system of the second embodiment, in which 18 indicates a fire alarm system, 14 indicates a sensing section, 21 indicates an image capturing section, and 22 indicates a transmitting section. The fire alarm device 18 of the second embodiment is characterized by having a detection unit 14 that detects smoke and / or ignition, an image capture unit 21 that captures an image of the smoke and / or ignition detected by the detection unit 14, and a transmission unit 22 that transmits to the outside the image captured by the image capture unit 21. With this configuration, the smoke and / or ignition can be captured immediately after the outbreak of a fire, increasing the possibility of identifying the cause of the fire.

[0029] In the fire alarm device of the second embodiment, the time from when the detector detects smoke and / or fire to when the transmitter transmits an image is preferably more than 0 seconds and not more than 5 minutes, more preferably more than 0 seconds and not more than 1 minute, even more preferably more than 0 seconds and not more than 30 seconds, even more preferably more than 0 seconds and not more than 10 seconds, even more preferably more than 0 seconds and not more than 5 seconds, and particularly preferably more than 0 seconds and not more than 1 second. By setting the time within the above range, it is more likely that the image can be transmitted to the outside before the fire alarm device becomes inoperable due to a fire. [Explanation of symbols]

[0030] 1 Dust collector nozzle 2 Brush 2' Rotating Brush 3 Suction port 3' Center of suction port 4. Magnets 5 Suction direction 6. Top surface of the brush 7 dust 8 blades 9 Rotating shaft of rotary brush 10 Bellows Hose 11 Slippery coating layer 12 Suction device 13. Biosensing lighting device 14 Sensing part 15 Identification section 16 Lighting Department 17 Living Body 18 Fire alarm system 19 Irradiation unit 20 Fire extinguisher 21 Photography Department 22 Transmitter 30 light 40 Vacuum cleaner α The position where the distance between the center of the suction port and the rotation axis of the rotary brush is the shortest

Claims

1. A nozzle of a dust collector having a brush and a suction port connected to a suction device, A nozzle of a dust collector, the nozzle having a magnet between the brush and a suction port, in a direction in which dust collected through the brush during dust collection is sucked in.

2. 2. The nozzle of a dust collector according to claim 1, wherein the magnet is disposed at a position 0.1 to 5 cm in the suction direction from the outermost surface of the brush on the side closest to the dust.

3. 2. The nozzle of the dust collector according to claim 1, wherein the magnetic force of the magnet is 200 to 500 mT.

4. A dust collector nozzle having a brush, The direction in which dust collected through the brush is sucked during dust collection is perpendicular to the longitudinal direction of the brush, A nozzle of a dust collector having a blade parallel to the longitudinal direction of the brush and located 0.5 to 5 cm inward from the outermost surface of the brush.

5. 5. The nozzle of a dust collecting device according to claim 4, wherein the blade is arranged including a position where a distance between a center of a suction port connected to a suction device and a side of the brush in a longitudinal direction is shortest.

6. A dust collector nozzle having a rotating brush, The direction in which the dust collected through the rotary brush is sucked during dust collection is perpendicular to the rotation axis of the rotary brush, A nozzle of a dust collecting device, the nozzle having a blade parallel to the rotation axis of the rotary brush and located 0.5 to 5 cm inward from the outermost surface of the rotary brush.

7. 7. The nozzle of a dust collecting device according to claim 6, wherein the blade is arranged including a position where a distance between a center of a suction port connected to a suction device and a rotation axis of the rotary brush is the shortest.

8. A dust collector comprising the dust collector nozzle according to any one of claims 1 to 7.

9. A bellows hose with a lubricating coating layer on the inside.

10. The bellows hose according to claim 9, which is for use in an air conditioning device, a dust collecting device, or a cleaning device.

11. A living body sensing lighting device having a sensing unit that acquires information for identifying a torso of a living body in a target space, an identification unit that identifies the torso of the living body in the target space based on the information acquired by the sensing unit, and a lighting unit that operates based on the information identified by the identification unit, The lighting unit adjusts an illumination angle to illuminate the torso of a living organism.

12. A fire alarm device having a detection unit that detects smoke and / or fire and an illumination unit that illuminates light, A fire alarm device in which, when the sensing unit detects smoke and / or fire, the light emitted from the illumination unit activates a fire extinguisher.

13. A fire alarm device having a detection unit that detects smoke and / or fire, an image capturing unit that captures the smoke and / or fire detected by the detection unit, and a transmission unit that transmits the image captured by the image capturing unit to the outside.

14. The fire alarm device according to claim 13, wherein the time from when the detector detects smoke and / or fire to when the transmitter transmits an image is longer than 0 seconds and shorter than 5 minutes.

Citation Information

Patent Citations

  • Fire alarm and fire alarm system provided therewith

    JP2007193683A

  • Automatic illumination system for bathroom

    JP2009272075A

  • vacuum cleaner head

    JP2021511911A