lighting fixtures

Abstract

To prevent poisoning accidents due to carbon monoxide or the like by arranging a gas sensor in a lighting fixture and notifying workers of danger, to provide the workers with safe and secure work environment.SOLUTION: Lighting fixtures 1, 1A having a body 10 are composed of a measurement unit 60, a light source unit 30, and a power supply control unit 80. The measurement unit 80 has a gas sensor that detects specific gas, and alarm means of detecting the gas and issuing an alarm. The light source unit 80 comprises a light emitting unit 31 including a light emitting element 35 such as an LED, and a cover 50 that wraps around the light emitting unit 31. The power supply control unit 80 converts AC power supplied from an external power source into DC power, and supplies it to the measurement unit 80 and the light source unit 80.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lighting fixture. [Background technology]

[0002] In general, lighting fixtures are widely used for indoor lighting in general buildings such as detached houses and offices, as well as in specialized buildings such as schools, gymnasiums, hospitals, theaters, exhibition halls, department stores, factories, and warehouses, as well as for outdoor street lighting and work lights at construction sites. Work lights are used for lighting outdoor work sites, such as automobile maintenance, and for nighttime road construction and tunnel excavation work, to brightly illuminate the surrounding area. Work lights are commonly referred to as work lights or floodlights. Work lights are powered by commercial power sources such as 100V AC, 200V AC, or three-phase AC. Many work lights offer high light output, are waterproof, and are durable, making them useful not only for indoor and outdoor work, but also for lighting buildings and exhibits.

[0003] Straight-tube LED lighting fixtures have been proposed as lighting fixtures used as work lights (Patent Document 1). Also, portable devices have been developed that detect carbon monoxide generated at work sites and warn workers (Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Registered Utility Model No. 3215150

[0005] [Patent Document 2] Registered Utility Model No. 3148639 Summary of the Invention [Problem to be solved by the invention]

[0006] Patent Document 1 describes a straight-tube LED lighting fixture that includes a long support, multiple LED elements arranged in the longitudinal and circumferential directions on the outer surface of the long support, and a translucent cylinder that surrounds the long support. However, it has no functions to warn against specific gases, including toxic gases such as carbon monoxide that are harmful to workers, making it difficult to avoid danger.

[0007] Furthermore, Patent Document 2 describes a portable device that can be attached to clothing or the like to detect carbon monoxide generated at a work site or the like and warn the worker. However, since this device is to be carried by each individual, it is necessary to purchase one for each worker, which has the drawbacks of making preparation work complicated and increasing maintenance and costs.

[0008] Therefore, in order to solve the problems of the prior art documents, the present invention provides a safe and secure working environment for workers by arranging a gas sensor that detects specific gases in a lighting fixture, brightly illuminating the area around the worker, and sounding an alarm before specific gases, including toxic gases such as carbon monoxide, in the working environment reach levels that are dangerous to the human body, thereby informing the worker of the danger and preventing poisoning accidents caused by carbon monoxide, etc., and ensuring light during power outages. [Means for solving the problem]

[0009] In order to achieve the above object, a lighting fixture according to an aspect of the present invention comprises: A lighting fixture having a main body consisting of a measurement unit, a light source unit, and a power supply control unit, the measuring unit has a gas sensor that detects a specific gas and an alarm means that detects the gas and issues an alarm, the light source unit includes a light emitting unit including a light emitting element such as an LED, and a cover that encases and covers the light emitting unit; The power supply control unit converts AC power supplied from an external power supply into DC power and supplies the DC power to the measurement unit and the light source unit. [Effects of the Invention]

[0010] According to the present invention, by arranging a gas sensor that detects specific gases, including toxic gases such as carbon monoxide, in a lighting fixture that uses a light source consisting of a light-emitting element such as an LED, a bright, safe and secure working environment with a simple structure is provided. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of a lighting fixture according to a first embodiment. [Figure 2] FIG. 2 is a perspective view of a power supply control unit according to the first embodiment. [Figure 3] 2 is a cross-sectional view of the lighting fixture shown in FIG. 1 taken along line AA. [Figure 4] FIG. 2 is a plan view of a light-emitting unit according to the first embodiment. [Figure 5] FIG. 10 is a side view of a main body of a lighting fixture according to a second embodiment. [Figure 6] FIG. 10 is a side view showing a state in which the main bodies of the lighting fixtures according to the second embodiment are connected. DETAILED DESCRIPTION OF THE INVENTION

[0012] To facilitate understanding of the present invention, an example of a lighting fixture according to an embodiment of the present invention will be described with reference to Figures 1 to 6. The lighting fixture according to the embodiment of the present invention is a lighting fixture having a substantially cylindrical light source unit that uses light-emitting elements such as LEDs, which are generally called work lights or task lights.

[0013] It should be noted that the examples described below show one specific example of the present invention, and therefore the arrangement, functions, numerical values, etc. of the components described in the examples are merely examples, and the scope of the present invention should not be construed as being limited by these. In addition, some of the components that make up the lighting fixture, such as wiring and screws, have been omitted to avoid complicating the drawing. [Example]

[0014] Fig. 1 is a perspective view of a lighting fixture 1 according to a first embodiment of the present invention. As shown in the figure, the lighting fixture 1 according to the first embodiment is composed of a long, substantially cylindrical main body 10 and a tripod 100 that supports the main body 10 in a vertical position. The lighting fixture 1 can be easily carried by folding the tripod 100 or by separating it from the tripod 100, and is therefore highly portable.

[0015] The main body 10 has a measuring unit 60 at the top, a light source unit 30 in the middle, and a power supply control unit 80 at the bottom. The measuring unit 60 has a built-in gas sensor for detecting specific gases such as carbon monoxide, and an alarm device (alarm means) that issues an alarm depending on the detection level of the gas sensor. The alarm means has two alarm levels; for example, in a work environment, a first alarm (alarm level 1) is issued when the carbon monoxide concentration reaches 50 ppm or higher, and a second alarm (alarm level 2) is issued when the carbon monoxide concentration reaches 150 ppm or higher.

[0016] Alarms can be issued by light, sound, vibration, or other means. Light alarms notify workers by flashing the brightness of the light source unit 30, urging them to prepare for evacuation. At alarm level 1, the light source unit 30 flashes repeatedly about once every 2-3 seconds, and at alarm level 2, it flashes repeatedly about once every 0.5-1 second. However, to avoid the work environment becoming completely dark when issuing a light alarm, the brightness of the light source unit 30 is kept at about 30-50% of its maximum brightness.

[0017] In addition to the optical alarm described above, other alarms can include audible alarms such as a buzzer or voice alarm, or vibrations such as small vibrations of the lighting device 1. Equipping the measurement unit 60 with these alarms, either alone or in combination, makes it easier to alert the worker and more effective. The measurement unit 60 also has a hemispherical umbrella portion 62 on its upper surface. A thin, slit-shaped air inlet 61 is provided below the ring-shaped umbrella portion. The air inlet 61 guides air from the work environment to the gas sensor. By providing the air inlet 61 in the shaded area below the umbrella portion 62, it prevents dust and water from entering from the outside, improving dustproofing and waterproofing. The air inlet 61 is not limited to a slit-shaped one; it can also be, for example, one with multiple small circular openings or a mesh-like structure, as long as it can ensure dustproofing and waterproofing. Furthermore, a dustproof and waterproof filter may be attached to the entrance of the air inlet 61.

[0018] 2 is a perspective view of the power supply control unit 80 according to the first embodiment. As shown in the figure, the power supply control unit 80 has a substantially cylindrical shape and is provided with recesses 82, 83, and 84 on its side surfaces and a recess 81 on its top surface. A connector 93 having a pair of blades 90 is housed in the recess 82, a power switch 92 is housed in the recess 83, and an unlock button 96 for disengaging the power supply control unit 80 from the tripod 100 is housed in the recess 84 so that they do not protrude outward from the side surface of the power supply control unit 80. Furthermore, an indicator LED 91 is disposed above the power switch 92 in the recess 83, which emits light when the power is on to indicate the lit state.

[0019] The recess 82 is intended to prevent accidents such as damaging the blade portion 90 of the connector 93 of the power supply control unit 80 when setting up the lighting fixture 1 at the work site or during work, and the recess 83 is intended to prevent accidents such as accidentally touching the power switch 92 with a finger or the like and causing the lighting fixture 1 to malfunction.

[0020] The pair of blades 90 of the connector 93 are a power inlet socket with blades for electrically connecting to the female socket 132 of the power cord 135 shown in Figure 5, but this is not limited to this and other sockets may be used depending on the power cord 135.

[0021] A power switch 92 turns on / off the power supply to the light source unit 30 and the measurement unit 60. The power supply control unit 80 receives AC power from a connector 93 provided on the side surface, and supplies appropriate DC power to the light source unit 30, the measurement unit 60, and a battery (not shown) via an AC / DC converter (not shown) built into the power supply control unit 80.

[0022] A battery (not shown) is also built into the power supply control unit 80. The battery is charged by receiving DC power from a built-in AC / DC converter (not shown), and supplies power to the light source unit 30, measurement unit 60, etc. during a power outage or in a work environment where there is no power supply from an external power source (AC power source).

[0023] As the battery, it is desirable to use a lithium-ion battery, especially a lithium iron phosphate battery, which is resistant to overcharging and overdischarging and has a long life. Alternatively, a large-capacity nickel-metal hydride (Ni-MH) battery may be used. By incorporating a battery, it is possible to provide a work environment similar to that when there is an external power source, even at a work site where there is no nearby power source. Furthermore, even in an emergency or sudden power outage, the built-in battery can supply power, and the light source unit 30 can be turned on to ensure light for up to about two days.

[0024] The light source unit 30 has a cylindrical bottom that is approximately the same shape as the recess 81 provided in the upper part of the power supply control unit 80. The light source unit 30 is fixed to the power supply control unit 80 by fitting the bottom of the light source unit 30 into the recess 81 of the power supply control unit 80 and then using fixing means such as screws.

[0025] When main body 10 is used in an upright position at a work site, tripod 100 is used. Lighting fixture 1 is stored with tripod 100 folded. Tripod 100 has a structure that can be separated from main body 10. As shown in FIG. 1 , tripod 100 has an annular gripping member 105 at the top that surrounds and supports main body 10, a holding member 108 at the bottom on which power supply control unit 80 is placed, three legs 102 that support main body 10 so that it stands on the ground, and connecting members 104 that connect each leg 102 to holding member 108. Annular gripping member 105 is a member for holding the cylindrical portion of light source unit 30, and has a hinge so that it can be opened and closed freely. The holding member 108 is a circular member supported by three connecting members 104, and has a circular opening (not shown) on the inside and a pair of recesses (not shown) on the inner periphery of the opening into which a pair of locking members 95 arranged on the protrusions 85 of the power supply control unit 80 fit.

[0026] The procedure for assembling the main body 10 will be described with reference to FIGS. (1) First, open the legs 102 of the tripod and place it on the ground. (2) Open the annular portion of the gripping member 105, position the main body 10 in a vertical position on the gripping member 105, and then close the annular portion to lock it so that it does not open. (3) The power supply control unit 80 is installed by fitting the protrusion 85 on the bottom into the opening of the holding member 108 of the tripod 100. That is, a pair of locking members 95, which are provided on the side surfaces of the protrusion 85 near the bottom of the power supply control unit 80 and biased outward, fit into recesses (not shown) provided on the inner periphery of the annular holding member 108, thereby fixing the locking members 95 in the recesses and fixing the power supply control unit 80 to the holding member 108.

[0027] The procedure for separating the tripod 100 from the lighting fixture 1 and putting it away is as follows. (1) The unlock button 96 disposed in the recess 84 on the side surface of the power supply control unit 80 is pressed to release the engagement between the lock member 95 and the recess provided on the inner periphery of the holding member 108 . (2) Open the annular portion of the gripping member 105 and remove the main body 10. (3) Fold the tripod 100.

[0028] Fig. 3 is a cross-sectional view of the lighting fixture 1 shown in Fig. 1 taken along line AA, and Fig. 4 is a plan view of the base member 32 according to Example 1. Note that in Fig. 3 and other figures, the components are depicted as cross-sectional views, and hatching representing cross sections and internal structures are basically omitted.

[0029] As shown in FIG. 3, the light source unit 30 is composed of a light-emitting unit 31 and a cover 50. The light-emitting unit 31 is composed of three elongated base members 32 assembled together in a substantially equilateral triangular cross section, and a substrate 34 on which a light-emitting element 35 such as an LED is mounted is mounted on the surface of each base member 32. Equilateral triangular support members 38 are disposed at the contact points between adjacent base members 32, thereby securing the base members 32 to each other. The support members 38 are disposed at multiple locations along the longitudinal direction of the base members 32. The light-emitting unit 31 is configured to irradiate light outward from the base members 32 assembled together in a substantially triangular shape, and the irradiated light emitted from the light-emitting unit 31 is irradiated in all directions, thoroughly illuminating the periphery of the lighting fixture 1.

[0030] The cover 50 is a long, cylindrical member. The light-emitting unit 31, which is made up of three base members 32 on which the substrate 34 is mounted, is entirely covered by the cover 50. The cover 50 is a member also called a globe or shade, and is made of a translucent resin material such as polycarbonate resin. The cover 50 protects the substrate 34 on which the light-emitting elements 35, such as LEDs, are mounted, and has the function of evenly diffusing light emitted from the light-emitting elements 35 and providing anti-glare properties.

[0031] 3, inside the base member 32, that is, on the surface opposite to the mounting surface of the substrate 34, inside the triangular prism surrounded by the three base members 32, a cable 40 is arranged to provide electrical continuity between the power supply control unit 80 and the measurement unit 60. The cable 40 is fastened to support members 38 provided at multiple locations along the longitudinal direction inside the base member 32, and includes a DC cable that supplies DC power from the power supply control unit 80 to the measurement unit 60.

[0032] 4 is a plan view of a light-emitting unit 31 on which a substrate 34 according to Example 1 is mounted. As shown in the figure, one light-emitting unit 31 is a base member 32 made of a single elongated flat plate, and a elongated substrate 34, similar to the base member 32, is mounted on the front surface. The base member 32 functions as a heat sink that dissipates heat generated near a light-emitting element 35 such as an LED. The base member 32 is formed from a metal material such as aluminum or iron, but may also be made of a synthetic resin or the like with high thermal conductivity.

[0033] Narrow locking portions 34A are provided on the side of the board 34 by cutting out both sides at multiple locations. By arranging board guides 34B in locking portions 34A, the board 34 is fixed to the front of the main body, minimizing the sliding range of the board 34. Furthermore, board guides 34B are made of a transparent synthetic resin material, but a material colored in yellow, blue, or the like may also be used.

[0034] The light emitting elements 35, such as LEDs, are configured as white LEDs or LEDs that combine red (R), green (G), and blue (B). A plurality of light emitting elements 35 are mounted on the substrate 34, and the light emitting elements 35 are mounted at approximately equal intervals in the column direction on the planar, substantially rectangular substrate 34. The row of the light emitting elements 35 may be a single row or multiple rows. Furthermore, the light emitting elements 35 are not limited to LEDs, and may be organic ELs or the like.

[0035] The substrate 34 is made of a single flat plate corresponding to the length of the base member 32, but may also be configured by arranging a plurality of rectangular substrates 34 in a row and connecting them to each other. Furthermore, the light-emitting elements 35 are not limited to being arranged in a row on the substrate 34, but may also be arranged in multiple parallel rows, or in a mixture of multiple rows and single rows along the longitudinal direction.

[0036] The three base members 32 and the substrates 34 mounted on these three base members 32 are coated with white paint or the like on the surface on the light emitting side, and by reflecting the light emitted from the light emitting element 35 outward, the light emitted from the light emitting element 35 is efficiently reflected, thereby efficiently illuminating the work site brightly.

[0037] When the lighting device 1 of Example 1 is connected to an external power source (AC power source), it uses power supplied from the external power source, and when used without being connected to an external power source, it operates using DC power supplied from a battery in the power supply control unit 80.

[0038] The specifications of lighting fixture 1 are roughly as follows: (1) Brightness of light source unit 30: 5000-10000lm (lumens) (2) Dustproof and waterproof standard: IP66 or IP67 (3) Alarm level: First level: carbon monoxide concentration 50 ppm, second level: 150 ppm

[0039] Furthermore, the lighting device 1 in the first embodiment has approximately the following size, but is not limited to this. (1) Measuring section 60: Length approximately 50mm-120mm, diameter approximately 50mm-120mm (2) Main body 10: Length approximately 800mm-1500mm, diameter equivalent to measuring part 60 (3) Power supply control unit 80: Length approximately 150mm-300mm, diameter approximately 80mm-200mm [Example]

[0040] FIG. 5 is a side view of a main body 10A of a lighting fixture 1A according to Example 2, and FIG. 6 is a side view showing a state in which the main bodies 10A and 10B of the lighting fixture 1A according to Example 2 are connected together. As shown in FIG. 5, the main body 10A includes a measurement unit 60A at the top, a light source unit 30 in the middle, and a power supply control unit 80 at the bottom. As in Example 1, the measurement unit 60A includes a built-in gas sensor that detects specific gases such as carbon monoxide, and an alarm device (alarm means) that uses light, sound, vibration, or the like to alert an operator when the concentration of a gas such as carbon monoxide exceeds a safety standard. In Example 2, the lighting fixture 1A and the main body 10A are synonymous.

[0041] The light source unit 30 of the second embodiment has fixtures 12 attached to two longitudinal sides. Fixtures 12 have holes 15 for threading strings 16, and hooks 120 are attached to the ends of the strings 16. The hooks 120 are attached to stakes, hanging devices, poles, etc. installed on the walls of the work site, and the main unit 10A is installed horizontally. While the main unit 10A may be used alone, as shown in FIG. 6 , arranging multiple main units, such as main unit 10B parallel to main unit 10A, can brightly illuminate a wide area, improving the work environment. This method is particularly effective in tunnels and sewer premises. In the second embodiment, the external power source and the main units 10A, 10B, etc. are electrically connected to each other via multiple power cords 135.

[0042] The fixture 12 is shaped like an arc along the side of the light source part 30, and when the fixture 12 is not in use, it is fixed in close contact with the side of the light source part 30, so the fixture 12 does not protrude and does not get in the way during work or storage.

[0043] As shown in Fig. 5, power cord 135 has a bladed power plug 130 at one end and a female socket 132 at the other end. By inserting power plug 130 into an external power source, AC power is supplied from the external power source to main unit 10A. The AC power supplied from the external power source is converted to appropriate DC power through connector 93 of power supply control unit 80 and then supplied to light source unit 30 and measurement unit 60A. Power supply control unit 80 has the same specifications as in Example 1.

[0044] A measuring unit 60A is disposed at the end of the main body 10A, and similar to the first embodiment, the measuring unit 60A incorporates a gas sensor for detecting specific gases such as carbon monoxide, and an alarm device (alarm means) that issues an alarm according to the detection level of the gas sensor.

[0045] In the second embodiment, the cable 40 disposed within the light source unit 30 includes not only a DC cable for supplying DC power but also an AC cable for supplying AC power input from an external power source to the power supply control unit 80 to a connector 138 disposed at the tip of the measurement unit 60A. The connector 138 is electrically connected to a connector 93 of another main body 10B through a power cord 135.

[0046] Connector 138 is provided with dustproof and waterproof lid 143 that covers the entire connector 138 from above to protect connector 138 from leakage current and the like caused by the intrusion of dust particles, water droplets, etc. Lid 143 is roughly hemispherical and is closed when not electrically connected to main body 10B, but can be opened and closed freely by hinge 144 and fastener 145, and remains open when connected to main body 10B.

[0047] Furthermore, an air inlet 61 having the same specifications as in the first embodiment is provided in the shaded portion below the hinge 144. This improves dustproof and waterproof effects. The air inlet 61 is not limited to a slit-like shape, and may have a plurality of fine circular openings or a mesh-like shape as long as it can ensure dustproof and waterproof effects. Furthermore, a filter with dustproof and waterproof functions may be attached to the entrance of the air inlet 61.

[0048] Furthermore, as shown in FIG. 6, by serially connecting multiple main units 10A, 10B, etc. with a power cord 135, multiple main units can be used as work lights, easily providing a comfortable working environment by brightly illuminating a large area.

[0049] The lighting device 1A in Example 2 has approximately the following size, but is not limited to this. (1) Measuring section 60A: Length approximately 50mm-120mm, diameter approximately 50mm-120mm (2) Main body 10: Length approximately 800mm-1500mm, diameter equivalent to measuring part 60A

[0050] The specifications of lighting fixture 1A are the same as those of lighting fixture 1, as follows: (1) Brightness of light source unit 30: 5000-10000lm (lumens) (2) Dustproof and waterproof standard: IP66 or IP67 (3) Alarm level: First level: carbon monoxide concentration 50 ppm, second level: 150 ppm

[0051] The main body 10A in the second embodiment can use the tripod 100 in the first embodiment. By using the tripod 100, the main body 10A can be used in a vertically standing state, similar to the main body 10 in the first embodiment.

[0052] The measuring units 60, 60A of the present invention are used to measure the carbon monoxide concentration in the air at work sites, etc., but by selecting the measurement sensor, they can be used to measure not only carbon monoxide concentration but also toxic gases such as hydrogen sulfide, hydrogen chloride, ammonia, and nitrous acid gas, as well as oxygen concentration and carbon dioxide concentration, and as an alarm device.

[0053] The present invention is not limited to the above-described embodiment, and various modifications and applications of the above-described embodiment are possible. [Industrial Applicability]

[0054] According to the present invention, a sensor that detects specific gases, including toxic gases such as carbon monoxide, is placed in the lighting fixture, brightly illuminating the area around the worker and sounding an alarm when the specific gas in the work environment reaches a level that is dangerous to the human body, thereby notifying the worker of the danger, thereby providing a safe and secure work environment for the worker. [Explanation of symbols]

[0055] 1.1A lighting fixture 10, 10A, 10B main body 12 Fixtures 15 holes 16 String 30 Light source section 31 Light-emitting part 32 Base material 34 PCB 34A Locking part 34B PCB guide 35 Light-emitting element 38 Support member 40 Cable 50 Cover 60,60A measuring section 61 Air intake 62 Umbrella section 80 Power supply control unit 81, 82, 83, 84 recesses 85 Convex part 90 Blade part 91 Display LED 92 Power switch 93 Connector 95 Locking member 96 Unlock button 100 tripods 102 Legs 104 Connecting member 105 Gripping member 108 Retaining member 120 hooks 130 power plug 132 female socket 135 power cord 138 Connector 143 Lid 144 Hinge 145 fasteners

Claims

1. A lighting fixture having a main body consisting of a measurement unit, a light source unit, and a power supply control unit, the measuring unit has a gas sensor that detects a specific gas and an alarm means that detects the gas and issues an alarm, the light source unit includes a light emitting unit including a light emitting element such as an LED, and a cover that encases and covers the light emitting unit; the power supply control unit converts AC power supplied from an external power supply into DC power and supplies the DC power to the measurement unit and the light source unit; The main body includes the measurement unit, the light source unit, and the power supply control unit arranged in this order, the measuring unit has a connector at its top and an openable / closable lid that covers the connector; The connector is supplied with AC power input to the power supply control unit, and is electrically connectable to another main body via a power cord.

2. the power supply control unit has a connector, 2. The lighting fixture according to claim 1, wherein the connector of the power supply control unit is electrically connectable to a female socket of a power cord having a power plug at one end and a female socket at the other end.

3. 2. The lighting fixture according to claim 1, wherein the power supply control unit includes a power switch on a side surface thereof for turning on / off the power supply of the lighting fixture.

4. the lighting fixture comprises a tripod; The tripod is foldable and detachable from the main body, 2. The lighting fixture according to claim 1, wherein the main body is supported in a vertical position during use.

5. The power supply control unit has a built-in rechargeable battery, 2. The lighting fixture according to claim 1, wherein the battery supplies power to the light source unit and the measuring unit as needed.

6. 2. The lighting fixture according to claim 1, wherein the main body has a fixture on a side thereof for hanging the main body.

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