Lighting device

Abstract

To provide a lighting device with easily adjustable output. [Solution] The lighting device 10 comprises a light source 11, a magnetic sensor 12, and a power supply unit 13. The magnetic sensor 12 detects when it is placed in a magnetic field. The power supply unit 13 supplies lighting power to the light source 11 and adjusts the output in accordance with the detection by the magnetic sensor 12.

Description

Technical Field

[0001] Embodiments of the present invention relate to lighting devices.

Background Art

[0002] Conventionally, in a dimmable lighting device, output adjustment is performed according to a wired signal input using a signal line or a wireless signal input using a wireless communication unit. However, in the case of wired communication using a signal line, wiring work is required, and in the case of wireless communication, an expensive wireless communication unit is required, leaving room for improvement.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide a lighting device whose output can be adjusted simply.

Means for Solving the Problems

[0005] The lighting device according to the embodiment includes a light source, a magnetic sensor, and a power supply unit. The magnetic sensor detects that it is disposed in a magnetic field. The power supply unit supplies lighting power to the light source and adjusts the output according to the detection of the magnetic sensor.

Effects of the Invention

[0006] According to the embodiment, it can be expected to provide a lighting device whose output can be adjusted simply.

Brief Description of the Drawings

[0007] [Figure 1] It is a circuit diagram of a lighting device provided with a magnetic sensor showing one embodiment. [Figure 2] This is a perspective view of the same lighting device. [Figure 3] This is a perspective view of the main body showing an example of the arrangement of the magnetic sensor. [Figure 4] This is a perspective view of a lighting device showing another example of the arrangement of the same magnetic sensor. [Figure 5] The above diagram shows a lighting device using multiple magnetic sensors, with (a) being a circuit diagram and (b) being an explanatory diagram illustrating the correspondence between the multiple magnetic sensors and magnets. [Modes for carrying out the invention]

[0008] One embodiment will be described below with reference to the drawings.

[0009] Figure 1 shows the circuit diagram of the lighting device 10. The lighting device 10 comprises a light source 11, a magnetic sensor 12, and a power supply unit 13.

[0010] The light source 11 includes a light-emitting element such as an LED that is dimmable.

[0011] The magnetic sensor 12 detects when it is placed in a magnetic field and outputs a signal to the power supply unit 13. For example, a reed switch 14 can be used as the magnetic sensor 12. In the reed switch 14, for example, a pair of reeds are sealed in a glass tube with a gap between them. When the magnet 15 is placed in close proximity to the magnetic field, a north pole and a south pole are induced in the pair of reeds, and the contacts close. When the magnet 15 is moved away and removed from the magnetic field, the pair of reeds separate elastically and the contacts open.

[0012] The power supply unit 13 includes, for example, an AC-DC converter and a DC-DC converter, and receives AC power supplied from a commercial AC power source E, converts it into a predetermined illuminating power which is DC power, and supplies it to the light source 11 to light up the light source 11. The power supply unit 13 adjusts the output value of the illuminating power in response to the detection of a magnetic field by the magnetic sensor 12, thereby dimming the light source 11. For example, when the contact of the reed switch 14 is off, the illuminating power is set to the first output value, and when the contact of the reed switch 14 is on, the illuminating power is adjusted to a second output value which is lower than the first output value or a second output value which is higher than the first output value.

[0013] Figures 2 to 4 show an example of the structure of the lighting device 10. The lighting device 10 comprises a main body 20 installed on the ceiling surface, which is the installation surface, and a light source unit 21 that is detachably arranged on the main body 20.

[0014] The main body 20 has a long top plate portion, which is a mounting plate portion 23, side plate portions 24 that are bent downward from both sides in the short direction intersecting the longitudinal direction of the mounting plate portion 23, and end plate portions 25 that are located at both ends in the longitudinal direction of the mounting plate portion 23. A long storage portion 26 is formed inside the main body 20, and a long opening 27 that communicates with the storage portion 26 is formed on the lower side. Mounting holes 28 for mounting to the ceiling surface are provided near both ends of the mounting plate portion 23, and a wiring hole 29 for drawing in power lines from the outside is provided at one end of the mounting plate portion 23.

[0015] Inside the main body 20, a terminal block 30 and a power supply unit 13 are arranged in the central region along the longitudinal direction of the main body 20, and a spring receiving member 31 is arranged on one end along the longitudinal direction. Power lines drawn into the main body 20 from the wiring hole 29 are connected to the terminal block 30, and the AC power supplied by the power lines is input to the power supply unit 13 through the terminal block 30. Output lines that output lighting power are drawn out from the power supply unit 13, and when the light source unit 21 is attached to the main body 20, the output lines are electrically connected to the light source unit 21.

[0016] The light source unit 21 includes a long chassis 33, a light source 11 attached to the lower surface side of the chassis 33, a cover 34 attached to the chassis 33 so as to cover the light source 11, a mounting spring 35 disposed at one end side in the longitudinal direction of the chassis 33, and a magnet portion 36 disposed at the other end side in the longitudinal direction of the chassis 33.

[0017] The chassis 33 has a long light source mounting plate portion 37 and side wall portions 38 that rise from both sides in the short side direction of the light source mounting plate portion 37 to the back side of the chassis 33.

[0018] As the light source 11, a light source module in which a plurality of light emitting elements such as LEDs are mounted on a long substrate is used.

[0019] The cover 34 has a convex curved surface-shaped cover portion 40 facing the light source 11 and end face portions 41 that close both end faces of the cover portion 40. The cover portion 40 is made of resin and has light transmittance and diffusibility of light from the light source 11. The cover portion 40 has an engaging portion 42 that engages with the upper sides of the side wall portions 38 on both sides of the chassis 33 in a state where a part of the cover portion 40 abuts on the lower surface side of the chassis 33. The end face portion 41 may or may not have light transmittance.

[0020] The mounting spring 35 is attached to the chassis 33 by the mounting member 44. The mounting spring 35 is composed of, for example, a torsion spring. A pair of coil portions 45 are held by the mounting member 44, and a substantially U-shaped hook portion 46 connecting between one ends of the pair of coil portions 45 extends toward the longitudinal end side of the light source unit 21. The other ends of the pair of coil portions 45 are attached to the mounting member 44. The mounting spring 35 is arranged such that a spring force acts in a direction (counterclockwise direction in FIG. 4) in which the hook portion 46 goes from the upper side to the lower side through the end side of the chassis 33. Then, the mounting spring 35 is hooked on the spring receiving member 31 of the main body portion 20 in a state where the hook portion 46 is pulled up from the chassis 33 against the spring force, thereby temporarily suspending the light source unit 21 with respect to the main body portion 20 (see FIG. 4). Further, when the other end side of the light source unit 21 is pushed up, the spring force of the mounting spring 35 pulls up one end side of the light source unit 21 and attaches it to the main body portion 20, and is configured to hold the attached state.

[0021] The magnet portion 36 has a cylindrical magnet 48 and a pair of adsorption members 49 for holding the magnet 48. The pair of adsorption members 49 are attached to the mounting plate 50 by screwing, and the mounting plate 50 is attached to the chassis 33. The axial direction of the cylindrical magnet 48 is oriented in the short hand direction of the chassis 33, and the magnet 48 is sandwiched and held by the pair of adsorption members 49 from both sides in the axial direction. The adsorption member 49 is made of a ferromagnetic metal, stands up in a direction perpendicular to the upper surface of the chassis 33, the tip portion protrudes above the magnet 48 and also protrudes above the upper surface of the light source unit 21, and this tip portion contacts the lower surface of the mounting plate portion 23 of the main body portion and is adsorbed and attached by the magnetic force of the magnet 48.

[0022] When attaching the light source unit 21 to the main body portion 20, the hook portion 46 of the mounting spring 35 on one end side in the longitudinal direction of the light source unit 12 is pulled up against the spring force and hooked on the spring receiving member 31 of the main body portion 20. In this state, the light source unit 21 is in a state of being temporarily suspended from the main body portion 20 via the mounting spring The output line from the power supply unit 13 and the light source 11 are electrically connected in the temporarily suspended state of the light source unit 21.

[0023] The other end of the light source unit 21, which is on the lower side, is rotated upward toward the main body unit 20, with one end of the light source unit 21 as the pivot point. The main body unit 20 and the light source unit 21 are positioned by fitting the side wall portion 38 of the chassis 33 and the engaging portion 42 of the cover 34, which protrude from the upper surface of the light source unit 21, into the opening 27 of the main body unit 20.

[0024] The magnet part 36 contacts the lower surface of the mounting plate part 23 of the main body part 20, and the magnetic force of the magnet part 36 attracts the light source part 21 to the mounting plate part 23, attaching the other end of the light source part 21 to the main body part 20.

[0025] As a result, the mounting spring 35 and the magnet 36 attach both ends of the long light source unit 21 in the longitudinal direction to the main body unit 20.

[0026] On the other hand, when removing the light source unit 21 from the main body unit 20, the other end of the light source unit 21 is pulled down against the magnetic attraction force of the magnet unit 36, and the magnet unit 36 ​​is pulled downward from the mounting plate unit 23 of the main body unit 20.

[0027] The mounting spring 35 connected to the main body 20 is used as a pivot point to rotate the other end of the light source unit 21 downwards, thereby temporarily suspending the light source unit 21 from the main body 20 via the mounting spring 35. With the light source unit 21 temporarily suspended, the electrical connection between the output wire from the power supply unit 13 and the light source 11 is disconnected.

[0028] The light source unit 21 is removed from the main body unit 20 by detaching the hook portion 46 of the mounting spring 35 from the spring receiving member 31.

[0029] Figure 3 also shows an example in which the magnetic sensor 12 is located in the power supply unit 13. The power supply unit 13 is housed in a metal power supply case 53 in which the power supply body, including the power supply circuit board, is made of ferromagnetic material. The magnetic sensor 12 is located on the inner side of the outer surface of the power supply case 53, facing the opening 27 on the lower surface of the main body 20. The power supply case 53 is provided with a magnetic force passage section 54 at a position facing the magnetic sensor 12, through which magnetic force can pass. The magnetic force passage section 54 is made up of an opening or groove in which a part of the power supply case 53 is cut out.

[0030] Furthermore, depending on the type of light source unit 21 combined with the main unit 20, the output value of the lighting power of the power supply unit 13 may be adjusted. In this case, the reed switch 14, which is a magnetic sensor 12, is switched between the off and on states.

[0031] When switching the reed switch 14 to the ON position, a magnetic sheet 55 is used as the magnet 15, and the magnetic sheet 55 is placed on the outer surface of the power supply case 53 so as to cover the magnetic field passage 54 of the power supply case 53, thereby being attached by magnetic force.

[0032] The magnetic force of the magnet sheet 55 passes through the magnetic field passage section 54, and the reed switch 14 is positioned within the magnetic field of the magnet sheet 55. The reed switch 14 positioned within the magnetic field switches from the off state to the on state, and in response, the power supply unit 13 supplies the second output value of lighting power to the light source 11.

[0033] Furthermore, the magnet 15 is not limited to the magnetic sheet 55; a rectangular or cylindrical solid magnet may be used and placed on the outer surface of the power supply case 53 so as to cover the magnetic field passage 54. Also, if the magnetic sensor 12 is located in the power supply unit 13, the magnetic sensor 12 may be located on the outside of the power supply unit 13.

[0034] On the other hand, if the magnetic sheet 55 is not placed on the power supply unit 13, the reed switch 14 remains in the off state, and the power supply unit 13 supplies the first output value of lighting power to the light source 11.

[0035] Figure 4 also shows an example in which the magnetic sensor 12 is located inside the main body 20, separate from the power supply unit 13. The reed switch 14, which is the magnetic sensor 12, is positioned near the adsorption region A where the magnet 36 of the light source unit 21 makes contact with the lower surface of the mounting plate 23 of the main body 20 and is attracted by magnetic force.

[0036] When the reed switch 14 is switched to the ON state, the light source unit 21 is attached to the main unit 20 by the mounting spring 35 and the magnet unit 36, and the reed switch 14 is positioned in the magnetic field of the magnet 48 of the magnet unit 36. The reed switch 14 positioned in the magnetic field switches from the OFF state to the ON state, and in response, the power supply unit 13 supplies the second output value of lighting power to the light source 11. In this case, the magnet 48 of the magnet unit 36 ​​is also used as the magnet 15 that positions the magnetic sensor 12 in the magnetic field.

[0037] On the other hand, by, for example, positioning the reed switch 14 away from the adsorption area A so that the magnetic field of the magnet 48 of the magnet section 36 does not affect it, the reed switch 14 remains in the off state, and the power supply section 13 supplies the first output value of lighting power to the light source 11, even when the light source section 21 is attached to the main body section 20 by the mounting spring 35 and the magnet section 36.

[0038] Figure 5 also shows an example in which multiple reed switches 14 are used as the magnetic sensor 12.

[0039] Multiple reed switches 14 are arranged in the main unit 20 or power supply unit 13 at predetermined intervals so that their magnetic fields do not affect each other. The power supply unit 13 adjusts the output value of the lighting power by the on / off combination of the multiple reed switches 14.

[0040] In the light source unit 21, a magnet 15 is placed in a position where a reed switch 14 can be turned on by placing it in a magnetic field, depending on the type of light source unit 21. In this case, multiple magnets 15 may be used.

[0041] When the light source unit 21 is attached to the main unit 20, the reed switch 14 located in the magnetic field of the magnet 15 is switched to the ON state, and in response, the power supply unit 13 supplies the adjusted lighting power to the light source 11.

[0042] Thus, in the lighting device 10 of this embodiment, by deciding whether or not to place the magnetic sensor 12 in the magnetic field of a magnet, wiring work like that required in the case of wired communication using signal lines is not necessary, and an expensive wireless communication unit like that required in the case of wireless communication is not needed, and the output of lighting power from the power supply unit 13 can be easily adjusted.

[0043] If the magnetic sensor 12 is placed inside the metal power supply case 53 of the power supply unit 13, the magnetic sensor 12 can be placed in the magnetic field of the magnet 15 by providing a magnetic field passage 54 in the power supply case 53.

[0044] By attaching the light source unit 21 to the main unit 20, the magnetic sensor 12 can be positioned in the magnetic field of the magnet 15.

[0045] The magnet 15 can be used interchangeably with the magnet 48 of the magnet section 36 that attaches the light source section 21 to the main body section 20, thereby reducing the number of parts.

[0046] Multiple reed switches 14 are used as magnetic sensors 12, and the output can be adjusted in multiple stages by combining the on / off states of the multiple reed switches 14.

[0047] Note that the magnetic sensor 12 is not limited to the reed switch 14; for example, a coil, Hall element, magnetoresistive element, etc., may also be used.

[0048] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of Symbols]

[0049] 10 Lighting devices 11 Light source 12 Magnetic Sensors 13 Power supply section 14 Reed switches 15 Magnets 20 Main body 21 Light source section 53 Power Supply Cases 54 Magnetic force passing section

Claims

1. Light source and; A magnetic sensor that detects when it is placed in a magnetic field; A power supply unit that supplies power to the light source and adjusts the output in accordance with the detection of the magnetic sensor; A lighting device characterized by having the following features.

2. The power supply unit comprises a power supply body and a power supply case that houses the power supply body and the magnetic sensor, and the power supply case is provided with a magnetic force passage section facing the magnetic sensor. The lighting device according to feature 1.

3. Main body and; A light source unit having the aforementioned light source and detachably attached to the main body; A magnet is placed on either the main body or the light source; Equipped with, The magnetic sensor is positioned on the other side of the main body and the light source, and is positioned in the magnetic field of the magnet through the mounting of the main body and the light source. The lighting device according to feature 1.

4. The magnet attaches the light source to the main body by magnetic force. The lighting device according to feature 3.

5. The magnetic sensor has a plurality of reed switches, The power supply unit adjusts the output by a combination of on / off states of the multiple reed switches. The lighting device according to any one of claims 1 to 4.

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