WO2025248944A1 - Lighting fixture - Google Patents

Abstract

This lighting fixture (1) comprises a mounting fixture (20) on which a lamp (10) is mounted and which is embedded in a ceiling. The mounting fixture (20) has a fixture body (21) and a heat dissipation mechanism (23) provided on the inside surface of the fixture body (21). The heat dissipation mechanism (23) is in contact with the lamp (10).

Description

lighting fixtures

This disclosure relates to lighting fixtures such as downlights.

Downlights, which are installed by being recessed into the ceiling, are known as one type of lighting fixture. Downlights are placed, for example, in through-holes in the ceiling.

In recent years, in order to save energy and extend life, LED light sources made up of light-emitting diodes (LEDs) have come to be used as the light source for lighting fixtures. LED light sources can be made to emit light by a power supply circuit made up of multiple circuit elements. Conventionally, downlights that use LED light sources have been known that have an LED light source built into them.

However, since installing and replacing downlights requires a licensed electrician, even if a user wants to change the color or light distribution angle of the light emitted by a downlight with an LED light source built in, after installing the downlight, they cannot do so because they cannot replace the light source themselves.

In response, a downlight has been proposed in which the lamp with an LED light source is separated from the mounting fixture, allowing the lamp to be attached to and detached from the mounting fixture. Patent Document 1 discloses an example of this type of downlight, a lighting fixture with a socket to which a lamp with a GX53 type base can be detachably attached. In such lighting fixtures, the color and light distribution angle of the illumination light can be changed by replacing the lamp.

JP 2010-129489 A

When a lighting fixture is turned on, heat is generated from the light source (light-emitting section) and circuit elements. For this reason, the lighting fixture needs to be able to dissipate the heat generated by the light source and circuit elements. LEDs in particular have the characteristic that their own heat generation causes their temperature to rise and their light output to decrease, so in lighting fixtures that use LED light sources, it is important to be able to dissipate the heat generated by the light source.

However, with the demand for smaller lighting fixtures, it is difficult for small mounting fixtures to provide sufficient heat dissipation performance.

Furthermore, by tightly contacting the outer surface of the lamp with the inner surface of the fixture body in the mounting fixture, the heat from the lamp can be conducted to the mounting fixture and dissipated, but to make lamp replacement easier, there needs to be a gap between the outer surface of the lamp and the inner surface of the fixture body that is at least large enough for a user's fingers to fit through. For this reason, it is not possible to tightly contact the outer surface of the lamp with the inner surface of the fixture body.

This disclosure was made in consideration of these issues, and aims to provide a lighting fixture that can efficiently dissipate heat generated by the lamp without compromising ease of lamp replacement.

One aspect of a lighting fixture according to the present disclosure includes a mounting fixture to which a lamp is attached and which is recessed into a ceiling, the mounting fixture having a fixture body and a heat dissipation mechanism provided on the inner surface of the fixture body, the heat dissipation mechanism being in contact with the lamp.

According to the present disclosure, heat generated by the lamp can be efficiently dissipated without compromising ease of lamp replacement.

FIG. 1 is a cross-sectional view of a lighting fixture according to a first embodiment. FIG. 2 is a diagram showing the lighting fixture according to the first embodiment in a state where the lamp is removed from the fixture. FIG. 3 is a diagram showing the configuration of a socket in the lighting fixture according to the first embodiment. FIG. 4 is a cross-sectional view of the mounting fixture taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view of a lighting fixture according to a modification of the first embodiment. FIG. 6 is a cross-sectional view of a lighting fixture according to the second embodiment. FIG. 7 is a diagram showing the lighting fixture according to the second embodiment when the lamp is removed from the fixture. FIG. 8 is a cross-sectional view of the mounting fixture taken along line VIII-VIII in FIG. FIG. 9 is a cross-sectional view of a lighting fixture according to a modification of the second embodiment. FIG. 10 is a cross-sectional view of a lighting fixture according to the third embodiment. FIG. 11 is a cross-sectional view of the lighting fixture taken along line XI-XI in FIG. FIG. 12 is a cross-sectional view of the lighting fixture according to the third embodiment when the lamp is removed from the fixture. FIG. 13 is a cross-sectional view of the lighting fixture taken along line XIII-XIII in FIG.

One aspect of the lighting fixture disclosed herein includes a mounting fixture to which a lamp is attached and which is recessed into a ceiling. The mounting fixture has a fixture body and a heat dissipation mechanism provided on the inner surface of the fixture body, and the heat dissipation mechanism is in contact with the lamp.

This configuration allows for efficient dissipation of heat generated by the lamp without compromising ease of lamp replacement.

Furthermore, in one aspect of the lighting fixture disclosed herein, the heat dissipation mechanism may be at least one protrusion, and the at least one protrusion may have a tip that contacts a side surface of the lamp.

This configuration allows for easy lamp replacement while still ensuring contact between the lamp and the fixture body after the lamp is installed in the fixture.

Furthermore, in one aspect of the lighting fixture according to the present disclosure, the at least one protrusion may protrude inward from the inner surface of the fixture body.

This configuration makes it easy to attach the lamp to the mounting fixture, and also makes it easy to ensure contact between the lamp and the fixture body after the lamp is attached to the mounting fixture.

Furthermore, in one aspect of the lighting fixture according to the present disclosure, the at least one protrusion may be elastically deformable. Specifically, the lamp may be configured to be inserted into the fixture body in a first direction when attached to the fixture body. The at least one protrusion may be deformable in the first direction.

With this configuration, the protrusion is pushed by the lamp and elastically deforms when the lamp is inserted into the fixture body, so the protrusion does not get in the way when the lamp is installed. This does not impede ease of lamp replacement. Furthermore, after the lamp is installed in the fixture body, the bent protrusion comes into contact with the side of the lamp, allowing heat generated by the lamp to be efficiently conducted to the fixture body. This allows heat generated by the lamp to be dissipated even more efficiently.

Furthermore, in one aspect of the lighting fixture according to the present disclosure, the at least one protrusion may consist of multiple protrusions, and the multiple protrusions may be arranged along the axial direction of the central axis of the fixture body.

This configuration increases the contact area between the heat dissipation mechanism and the fixture body, allowing heat generated by the lamp to be dissipated more efficiently.

Furthermore, in one aspect of the lighting fixture according to the present disclosure, the at least one protrusion may deform in a direction perpendicular to the central axis of the fixture body.

This configuration allows the protrusion to elastically deform in a direction perpendicular to the central axis of the device body.

Furthermore, in one aspect of the lighting fixture according to the present disclosure, the at least one protrusion may consist of multiple protrusions, which are arranged along the circumferential direction of the inner surface of the fixture body, and each of the multiple protrusions may be a folded plate-shaped member, and by rotating the lamp when attaching the lamp to the fixture body, the folded multiple protrusions may deform so as to extend in the rotational direction of the lamp.

With this configuration, the rotation of the lamp when it is attached to the fixture can be used to elastically deform the multiple protrusions, bringing the lamp into contact with the multiple protrusions.

Furthermore, in one aspect of the lighting fixture according to the present disclosure, the lamp may have a base, and the mounting fixture may have a socket to which the base of the lamp may be detachably attached.

This configuration allows for easy lamp replacement by simply attaching and detaching the lamp base from the socket.

Furthermore, in one aspect of the lighting fixture according to the present disclosure, the lamp may have an LED light source.

LEDs have the characteristic that their own heat generation causes their temperature to rise and their light output to decrease. However, the heat generated by the LED light source can be efficiently dissipated via a heat dissipation mechanism, which prevents the light output of lamps with LED light sources from decreasing.

(Embodiment)
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that each of the embodiments described below represents a specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, components that are not described in the independent claims that represent the highest concept of the present disclosure will be described as optional components.

Furthermore, each figure is a schematic diagram and is not necessarily an exact representation. Therefore, the scale and other details do not necessarily match between the figures. In each figure, the same reference numerals are used to designate substantially identical components, and redundant explanations will be omitted or simplified.

Furthermore, in this specification, the terms "above," "up," "below," and "below" do not refer to the upward direction (vertically upward) and downward direction (vertically downward) in absolute spatial recognition, but are used as terms defined by relative positional relationships. Furthermore, the terms "above," "up," "below," and "below" apply not only to cases where two components are arranged with a gap between them and another component exists between them, but also to cases where two components are arranged in contact with each other.

(Embodiment 1)
First, a lighting fixture 1 according to embodiment 1 will be described with reference to FIGS. 1 to 4. FIG. 1 is a cross-sectional view of the lighting fixture 1 according to embodiment 1. FIG. 2 is a diagram showing the lighting fixture 1 according to embodiment 1 with the lamp 10 removed from the mounting fixture 20. FIGS. 1 and 2 show a cross section taken along a plane passing through and parallel to the central axis of the mounting fixture 20. FIG. 3 is a diagram showing the configuration of the socket 22 in the lighting fixture 1 according to embodiment 1. FIG. 4 is a cross-sectional view of the mounting fixture 20 taken along line IV-IV in FIG. 2. Note that the socket 22 is not shown in FIG. 4.

As shown in Figures 1 and 2, the lighting fixture 1 comprises a lamp 10 and a mounting fixture 20 to which the lamp 10 is attached.

Lighting fixture 1 is a recessed lighting fixture that is installed by being embedded in a construction material such as the ceiling of a building, and emits illumination light downward (to the floor, wall, etc.). As shown in Figure 1, lighting fixture 1 in this embodiment is a downlight installed in a through hole 101 provided in ceiling 100, and emits illumination light toward the floor. Lighting fixture 1 emits light emitted from lamp 10 as illumination light. The planar shape of through hole 101 in ceiling 100 is circular.

Lamp 10 has a housing 11, a light-emitting unit 12, a translucent cover 13, two power supply pins 14 that serve as a base, and a power supply unit 15. In this embodiment, lamp 10 is a flat, thin lamp with an overall disk-like or flat shape.

The housing 11 houses the light-emitting unit 12 and the power supply unit 15. The light-emitting unit 12 and the power supply unit 15 are supported by the housing 11. The housing 11 may be made of either resin or metal. The power supply unit 15 is a power supply circuit that generates power to make the light-emitting unit 12 emit light. For example, the power supply unit 15 converts AC power (e.g., AC 100V commercial AC power) received by the two power feed pins 14 into DC power and supplies the DC power to the light-emitting unit 12. The power supply unit 15 includes, for example, a circuit board and multiple circuit elements mounted on the circuit board.

The light-emitting unit 12 emits light using power supplied from the power supply unit 15. The light-emitting unit 12 emits, for example, white light. In this case, the lamp 10 emits white light as illumination light.

In this embodiment, the light-emitting unit 12 is composed of an LED. Therefore, the lamp 10 is an LED lamp. As an example, the light-emitting unit 12 has a substrate and one or more LED elements mounted on the substrate. The LED elements may be surface-mounted LED packages or LED chips. When the LED elements are LED chips, the LED chips are covered with a sealing member. In this case, when a blue LED chip that emits blue light is used as the LED chip, the blue LED chip is sealed with a sealing member made of a resin material containing a yellow phosphor. This causes white light to be emitted from the sealing member.

When the light-emitting unit 12 emits light, heat is generated from the light-emitting unit 12 and also from the power supply unit 15. Specifically, when the light-emitting unit 12 emits light, heat is generated from the LED of the light-emitting unit 12 and also from the circuit elements of the power supply unit 15.

The light-emitting unit 12 is covered by a translucent cover 13. The translucent cover 13 is a translucent member that has translucency. Therefore, light from the light-emitting unit 12 that enters the inner surface of the translucent cover 13 passes through the translucent cover 13 and is emitted to the outside of the translucent cover 13. The translucent cover 13 is attached to the housing 11. Specifically, the translucent cover 13 is attached to the open end of the opening in the housing 11.

The translucent cover 13 can be made of a translucent resin material such as acrylic or polycarbonate, or a translucent material such as glass. The translucent cover 13 is a milky white diffusion cover that has light diffusing properties, but it may also be a transparent cover that does not have light diffusing properties.

The power feed pins 14 are electrically conductive pins. In this embodiment, the power feed pins 14 are made of a metal material. The power feed pins 14 receive power from outside the lamp 10 to cause the light emitting portion 12 to emit light. For example, two power feed pins 14 receive AC power from the socket 22 of the mounting fixture 20. The two power feed pins 14 and the power supply portion 15 are electrically connected by lead wires (not shown) or the like, and the AC power received by the two power feed pins 14 is supplied to the power supply portion 15 via the lead wires. In this embodiment, each of the two power feed pins 14 is a pin with a T-shaped cross section and a disc-shaped enlarged diameter portion at its tip.

The two power supply pins 14 are connection pins for connecting the lamp 10 to the socket 22 of the mounting fixture 20. Each power supply pin 14 is electrically and mechanically connected to the socket 22. As shown in FIG. 3, each power supply pin 14 is engaged with a pin receiving hole 22a formed in the socket 22, and is electrically and mechanically connected to a terminal board (not shown) arranged within the socket 22. Furthermore, by connecting the power supply pins 14 to the socket 22, the lamp 10 is held in the socket 22.

The two power supply pins 14 form the lamp 10's base, and are detachably attached to the socket 22. In this embodiment, the lamp 10's base is, for example, a GX53 type base. Therefore, in addition to the two power supply pins 14, the lamp 10 also has a protrusion 16 as part of the base. This protrusion 16 is part of the housing 11, and is provided on the surface of the housing 11 opposite the translucent cover 13 side. The power supply unit 15 is housed in the space inside this protrusion 16.

Furthermore, this protrusion 16 forms a step on the surface of the housing 11 opposite the light-transmitting cover 13 side. The two power feed pins 14 are provided on a step surface that is one step lower than this step. In other words, the two power feed pins 14 are provided on the sides of the protrusion 16. Specifically, the two power feed pins 14 are arranged 180 degrees apart around the protrusion 16. In other words, the two power feed pins 14 are arranged in opposing positions with the protrusion 16 in between.

The lamp 10 configured in this manner is attached to the mounting fixture 20. Specifically, the lamp 10 is inserted into the fixture body 21 of the mounting fixture 20 and attached to the socket 22 of the mounting fixture 20. For example, if the lighting fixture 1 is installed on a ceiling, as shown in Figure 1, the lamp 10 is attached to the socket 22 so that the translucent cover 13 faces the floor (i.e., so that the two power supply pins 14 face the ceiling). Therefore, the lamp 10 is inserted vertically into the mounting fixture 20.

The lamp 10 is removably attached to the socket 22. That is, the lamp 10 can be attached to and detached from the socket 22. This allows the lamp 10 to be replaced. For example, the lamp 10 can be attached to the socket 22 by inserting it into the fixture body 21 and rotating it around a horizontal plane. Specifically, the lamp 10 can be attached to the socket 22 by grasping the outer surface of the lamp 10 with one's hand, inserting the power supply pin 14 of the lamp 10 into the pin receiving hole 22a of the socket 22, and rotating the lamp 10 clockwise. On the other hand, to remove the lamp 10 from the socket 22, the lamp 10 can be removed from the socket 22 by rotating the lamp 10 counterclockwise.

The mounting fixture 20 is embedded in the ceiling 100. Specifically, the mounting fixture 20 is embedded in a through-hole 101 provided in the ceiling 100. As shown in Figures 1 and 2, the mounting fixture 20 has a fixture body 21, a socket 22, and a heat dissipation mechanism 23.

The fixture body 21 is embedded in a through-hole 101 provided in the ceiling 100. The fixture body 21 is cylindrical with a bottom, and has a cylindrical frame 21a and a top plate 21b.

The frame body 21a is a cylindrical member. The frame body 21a is placed in the through-hole 101 in the ceiling 100 and fixed to the ceiling 100. Although not shown, the frame body 21a is fixed to the ceiling 100 by a mounting spring or the like fixed to the frame body 21a. In this embodiment, the outer peripheral surface of the frame body 21a contacts the inner surface of the through-hole 101 in the ceiling 100, but this is not limited to this.

The frame 21a houses the lamp 10. The lamp 10 is surrounded by the frame 21a. Specifically, the outer peripheral surface of the lamp 10 faces the inner peripheral surface of the frame 21a. However, the inner peripheral surface of the frame 21a does not contact the lamp 10, and a gap exists between the inner peripheral surface of the frame 21a and the outer surface of the lamp 10. The gap between the inner peripheral surface of the frame 21a and the outer surface of the lamp 10 is, for example, 5 mm to 20 mm, but is not limited to this. From the perspective of making it easy to replace the lamp 10, it is desirable that the gap between the inner peripheral surface of the frame 21a and the outer surface of the lamp 10 be at least wide enough for a person's finger to fit through.

A flange-shaped collar is provided at the lower open end of the frame body 21a. The collar of the frame body 21a is formed so as to protrude outward from the outer surface of the frame body 21a. The collar of the frame body 21a abuts against the underside of the ceiling 100.

The frame 21a is made of a metal material such as aluminum or iron, or a resin material with high thermal conductivity. In this embodiment, the frame 21a is made of a metal material whose main component is aluminum. As an example, the frame 21a is made of aluminum die-cast.

Top plate 21b is a plate-shaped member. Top plate 21b is fixed to frame body 21a so as to cover the upper opening of frame body 21a. As an example, top plate 21b is disk-shaped. Top plate 21b is a metal plate made of a metal material such as aluminum or iron, or a resin plate made of a resin material with high thermal conductivity. In this embodiment, top plate 21b is an aluminum plate made of a metal material whose main component is aluminum.

The frame body 21a and the top plate 21b are preferably made of the same material, but may also be made of different materials. Furthermore, the frame body 21a and the top plate 21b may be integral rather than separate. In this case, the device body 21, in which the frame body 21a and the top plate 21b are integrated, can be formed by press working such as deep drawing.

The socket 22 is attached to the fixture body 21. Specifically, the socket 22 is fixed to the inner surface of the top plate 21b. For example, the socket 22 and the top plate 21b are fixed with screws, but this is not limited to this.

The socket 22 functions to hold the lamp 10 and supply power to the lamp 10. Specifically, the socket 22 has a socket function that is compatible with a GX53 type base. The socket 22 is made of an insulating resin material. Furthermore, the socket 22 has a circular shape when viewed from above.

The lamp 10's base is removably attached to the socket 22. Specifically, the socket 22 is provided with two pin receiving holes 22a into which the two power supply pins 14 that make up the lamp 10's base are engaged, and the two power supply pins 14 are removably attached to the socket 22. The socket 22 also has a recess 22b that receives the protrusion 16 of the lamp 10. When the lamp 10 is attached to the socket 22, the protrusion 16 of the lamp 10 is housed in the recess 22b.

The two pin receiving holes 22a correspond one-to-one to the two power supply pins 14 of the lamp 10. Specifically, the two pin receiving holes 22a are provided at 180-degree intervals around the circumference of the socket 22. Each pin receiving hole 22a consists of a large-diameter circular hole and an elongated hole connected to the circular hole. The elongated hole of the pin receiving hole 22a extends in the direction of rotation when the lamp 10 is rotated to attach it to the socket 22. For example, when attaching the lamp 10 to the socket 22, the large-diameter portion of the power supply pin 14 of the lamp 10 is inserted into the circular hole of the pin receiving hole 22a, and then the lamp 10 is rotated to move the power supply pin 14 along the elongated hole into the pin receiving hole 22a. As a result, the power supply pin 14 is engaged with the pin receiving hole 22a and electrically and mechanically connected to the terminal board arranged in the socket 22. Power is supplied to the lamp 10 when the power supply pin 14 comes into contact with the terminal board.

The heat dissipation mechanism 23 dissipates heat generated by the lamp 10. Specifically, the heat dissipation mechanism 23 dissipates heat generated by the light-emitting unit 12 and the power supply unit 15.

The heat dissipation mechanism 23 is provided on the inner surface of the fixture body 21. In this embodiment, the heat dissipation mechanism 23 is composed of protrusions 23a. Specifically, the heat dissipation mechanism 23 is composed of multiple protrusions 23a arranged at predetermined intervals along the axial direction of the central axis of the fixture body 21. For example, the heat dissipation mechanism 23 is composed of four protrusions 23a, but is not limited to this.

Each of the multiple protrusions 23a protrudes inward from the inner surface of the instrument body 21. Each of the multiple protrusions 23a has a cantilever beam structure, with one end (first end) fixed to the inner surface of the frame body 21a of the instrument body 21, and the other end (second end) which is a free end located on the opposite side of the inner surface of the frame body 21a. As shown in Figure 4, each protrusion 23a is annular with a constant width and is provided around the entire inner surface of the frame body 21a. Furthermore, each protrusion 23a is flat with a thickness smaller than its width, and extends so as to widen in a direction perpendicular to the central axis of the instrument body 21.

The heat dissipation mechanism 23 is in contact with the lamp 10. This allows heat generated by the lamp 10 to be conducted to the fixture body 21 via the heat dissipation mechanism 23. In this embodiment, the heat dissipation mechanism 23 is in contact with the side of the lamp 10.

Specifically, the tips of the multiple protrusions 23a that make up the heat dissipation mechanism 23 are in contact with the side surface of the lamp 10. In other words, the free ends of the protrusions 23a are in contact with the side surface of the lamp 10. In this embodiment, the tips of the multiple protrusions 23a are in contact with the outer surface of the housing 11 of the lamp 10.

The multiple protrusions 23a are preferably made of a material with high thermal conductivity, such as a metal material. This allows heat generated by the lamp 10 to be efficiently conducted to the fixture body 21 via the multiple protrusions 23a. The thermal conductivity of each protrusion 23a is, for example, between 50 (W/m·K) and 500 (W/m·K), but is not limited to this. In this embodiment, the multiple protrusions 23a are made of copper. Furthermore, the larger the contact area between each protrusion 23a and the lamp 10, the more effectively the heat dissipation can be improved.

When the lamp 10 is inserted into the frame 21a of the fixture body 21 and attached to the socket 22, the tips of the multiple protrusions 23a slide along the side of the lamp 10. At this time, it is preferable for the multiple protrusions 23a to be elastically deformed. This allows the tips of the multiple protrusions 23a to elastically deform when the lamp 10 is attached to the socket 22, making it easy for the lamp 10 to come into contact with the multiple protrusions 23a, and when the lamp 10 is removed from the socket 22, the multiple protrusions 23a return to their original state due to their elastic restoring force. Therefore, the lamp 10 can be replaced many times.

As described above, the lighting fixture 1 according to this embodiment includes a mounting fixture 20 to which a lamp 10 is removably attached. The mounting fixture 20 has a fixture body 21, a socket 22, and a heat dissipation mechanism 23 provided on the inner surface of the fixture body 21, and the heat dissipation mechanism 23 is in contact with the lamp 10.

With this configuration, heat generated by the lamp 10 can be conducted to the fixture body 21 via the heat dissipation mechanism 23, and the heat generated by the lamp 10 can be dissipated from the surface of the fixture body 21 into the air layer. Specifically, heat generated by the light-emitting unit 12 and power supply unit 15 of the lamp 10 can be conducted to the fixture body 21 via the heat dissipation mechanism 23 and dissipated.

Furthermore, in the lighting fixture 1 according to this embodiment, the lamp 10 and the fixture body 21 are not thermally coupled by tightly contacting the side of the lamp 10 with the inner surface of the fixture body 21, but rather the lamp 10 and the fixture body 21 are thermally coupled by sandwiching a heat dissipation mechanism 23 between them. This ensures a certain gap between the side of the lamp 10 and the inner surface of the fixture body 21, making it easy to attach the lamp 10 to the mounting fixture 20. This means that the lamp 10 can be easily replaced.

In this way, the lighting fixture 1 according to this embodiment can efficiently dissipate heat generated by the lamp 10 without compromising ease of lamp 10 replacement.

Furthermore, in the lighting fixture 1 according to this embodiment, the heat dissipation mechanism 23 is a protrusion 23a, the tip of which contacts the side of the lamp 10.

This configuration allows the lamp 10 to be easily replaced while still ensuring contact between the lamp 10 and the fixture body 21 after the lamp 10 is attached to the mounting fixture 20.

Furthermore, in the lighting fixture 1 according to this embodiment, the protrusion 23a protrudes inward from the inner surface of the fixture body 21.

This configuration makes it easy to attach the lamp 10 to the mounting fixture 20, and also makes it easy to ensure contact between the lamp 10 and the fixture body 21 after the lamp 10 is attached to the mounting fixture 20.

Furthermore, in the lighting fixture 1 according to this embodiment, the lamp 10 has a base, and the mounting fixture 20 has a socket 22 to which the base of the lamp 10 can be detachably attached.

This configuration allows the lamp 10 to be easily replaced by simply attaching and detaching the lamp 10 base to the socket 22.

In the lighting fixture 1 according to this embodiment, each of the multiple protrusions 23a constituting the heat dissipation mechanism 23 is annular with a fixed width and is provided around the entire inner circumferential surface of the frame body 21a. However, this is not limited to this. For example, as shown in FIG. 5, multiple protrusions 23aA constituting the heat dissipation mechanism 23A may be present in both the axial direction of the central axis of the fixture body 21 and the circumferential direction of the frame body 21a. In other words, the multiple protrusions 23aA are arranged like brush bristles. This makes the protrusions 23aA more susceptible to elastic deformation than the protrusions 23a in FIG. 4, making it easier to attach the lamp 10 to the fixture body 21 with less force and increasing the contact area between the lamp 10 and the fixture body 21. This makes it easier to replace the lamp 10 and more efficiently dissipates heat generated by the lamp 10.

(Embodiment 2)
Next, a lighting fixture 1B according to a second embodiment will be described with reference to Figures 6 to 8. Figure 6 is a cross-sectional view of the lighting fixture 1B according to the second embodiment. Figure 7 is a diagram showing the lighting fixture 1B according to the second embodiment when the lamp 10 is removed from the mounting fixture 20B. Figures 6 and 7 show a cross-section of the mounting fixture 20B taken along a plane passing through and parallel to the central axis of the mounting fixture 20B. Figure 8 is a cross-sectional view of the mounting fixture 20B taken along line VIII-VIII in Figure 7. Note that the socket 22 is not shown in Figure 8.

As shown in Figures 6 to 8, lighting fixture 1B according to this embodiment, like lighting fixture 1 according to embodiment 1 above, comprises a lamp 10 and a mounting fixture 20B to which lamp 10 is attached. In this embodiment, mounting fixture 20B also comprises a fixture body 21, a socket 22, and a heat dissipation mechanism 23B, and heat dissipation mechanism 23B is composed of multiple protrusions 23aB arranged axially along the central axis of fixture body 21. Furthermore, multiple protrusions 23aB protrude inward from the inner surface of fixture body 21, and the tip of each protrusion 23aB contacts the side of lamp 10.

In this embodiment, each of the multiple protrusions 23aB has a cantilever beam structure having one end (first end) fixed to the inner circumferential surface of the frame body 21a of the instrument body 21, and the other end (second end) which is a free end located on the opposite side of the inner circumferential surface of the frame body 21a. As shown in FIG. 8, each protrusion 23aB is annular with a constant width and is provided around the entire inner circumferential surface of the frame body 21a. Each protrusion 23aB is flat with a thickness smaller than its width, and extends so as to widen in a direction perpendicular to the central axis of the instrument body 21.

The lighting fixture 1B of this embodiment differs from the lighting fixture 1 of embodiment 1 above in the shape of the protrusions 23aB when they come into contact with the lamp 10. Specifically, the protrusions 23a in embodiment 1 above do not deform so as to bend when the lamp 10 is inserted, but the protrusions 23aB in this embodiment do deform so as to bend when the lamp 10 is inserted. More specifically, in this embodiment, each of the multiple protrusions 23aB is an elastically deformable valve. The lamp 10 is configured to be inserted into the fixture body 21 in a first direction when attached to the fixture body 21. The multiple protrusions 23aB are capable of deforming in this first direction.

For example, when the lamp 10 is inserted into the frame 21a of the fixture body 21 and attached to the socket 22, the free ends of the multiple protrusions 23aB are pushed by the lamp 10 and bent in the insertion direction (first direction) of the lamp 10. Therefore, the multiple protrusions 23aB come into contact with the side of the lamp 10 with their tips bent. In this case, the multiple protrusions 23aB are elastically deformed, so when the lamp 10 is removed from the socket 22, the multiple protrusions 23aB return to their original state due to their elastic restoring force. Therefore, the lamp 10 can be replaced many times.

In this embodiment, the multiple protrusions 23aB are also made of a metal material such as copper. Furthermore, the multiple protrusions 23aB are flexible elastic members.

As described above, lighting fixture 1B according to this embodiment, like embodiment 1 above, includes mounting fixture 20B to which lamp 10 is detachably attached. Mounting fixture 20B has fixture body 21, socket 22, and heat dissipation mechanism 23B provided on the inner surface of fixture body 21, with heat dissipation mechanism 23B in contact with lamp 10.

This configuration allows the heat generated by the lamp 10 to be efficiently dissipated without compromising the ease of lamp 10 replacement.

Furthermore, in this embodiment, the protrusions 23aB that make up the heat dissipation mechanism 23B are elastically deformable valves. The lamp 10 is configured to be inserted into the fixture body 21 in a first direction when attached to the fixture body 21. The multiple protrusions 23aB are deformable in this first direction.

With this configuration, when the lamp 10 is inserted into the fixture body 21, the free end of the protrusion 23aB is pushed by the lamp 10, causing it to elastically deform and bend, so the protrusion 23aB does not get in the way when the lamp 10 is installed. This does not impair the ease of replacing the lamp 10. Furthermore, after the lamp 10 is installed in the fixture body 21, the free end of the bent protrusion 23aB comes into contact with the side of the lamp 10, allowing heat generated by the lamp 10 to be efficiently conducted to the fixture body 21. This allows heat generated by the lamp 10 to be dissipated even more efficiently.

Furthermore, in this embodiment, multiple protrusions 23aB (valves) are arranged along the axial direction of the central axis of the device body 21.

This configuration increases the contact area between the heat dissipation mechanism 23B and the fixture body 21, allowing heat generated by the lamp 10 to be dissipated more efficiently.

In the lighting fixture 1B according to this embodiment, each of the multiple protrusions 23aB constituting the heat dissipation mechanism 23B is annular with a fixed width and is provided around the entire inner circumferential surface of the frame body 21a. However, this is not limited to this. For example, as shown in FIG. 9, multiple protrusions 23aC constituting the heat dissipation mechanism 23C may be present in both the axial direction of the central axis of the fixture body 21 and the circumferential direction of the frame body 21a. In other words, the multiple protrusions 23aC are arranged like brush bristles. This makes the protrusions 23aC more susceptible to elastic deformation than the protrusions 23aB in FIG. 8. This allows the lamp 10 to be easily attached to the fixture body 21 with less force and increases the contact area between the lamp 10 and the fixture body 21. This therefore makes it easier to replace the lamp 10 and more efficiently dissipates heat generated by the lamp 10.

(Embodiment 3)
Next, a lighting fixture 1D pertaining to embodiment 3 will be described with reference to FIGS. 10 to 13. FIG. 10 is a cross-sectional view of the lighting fixture 1D pertaining to embodiment 3. FIG. 11 is a cross-sectional view of the lighting fixture 1D taken along line XI-XI in FIG. 10. FIG. 12 is a cross-sectional view of the lighting fixture 1D pertaining to embodiment 3 when the lamp 10 is removed from the mounting fixture 20D. FIG. 13 is a cross-sectional view of the lighting fixture 1D taken along line XIII-XIII in FIG. 12. Note that FIGS. 10 and 12 show cross sections taken along a plane passing through and parallel to the central axis of the mounting fixture 20D. Specifically, FIG. 10 shows a cross-section taken along line X-X in FIG. 11, and FIG. 12 shows a cross-section taken along line XII-XII in FIG. 13.

As shown in Figures 10 to 13, lighting fixture 1D according to this embodiment, like lighting fixture 1 according to embodiment 1 above, comprises a lamp 10 and a mounting fixture 20D to which lamp 10 is attached. In this embodiment as well, mounting fixture 20D comprises a fixture body 21, a socket 22, and a heat dissipation mechanism 23D, which is composed of multiple protrusions 23aD that protrude inward from the inner surface of fixture body 21, with the tips of each protrusion 23aD contacting the side of lamp 10.

The lighting fixture 1D of this embodiment differs from the lighting fixture 1 of embodiment 1 above in the structure of the multiple protrusions 23aD that make up the heat dissipation mechanism 23D. Specifically, while the multiple protrusions 23a in embodiment 1 above were arranged along the axial direction of the central axis of the fixture body 21, the multiple protrusions 23aD in this embodiment are provided along the circumferential direction of the inner surface of the fixture body 21. Furthermore, while the protrusions 23a in embodiment 1 above did not bend or deform when the lamp 10 was inserted, the protrusions 23aD in this embodiment deform in a direction perpendicular to the central axis of the fixture body 21.

Specifically, each of the multiple protrusions 23aD is a bent plate-shaped member. For example, each of the multiple protrusions 23aD is a leaf spring made of metal plate, with one end fixed to the inner surface of the frame body 21a so that the main surface is parallel to the central axis of the device main body 21. As an example, each protrusion 23aD is shaped like a thin rectangular metal plate wound longitudinally, and has one side (first side) fixed to the inner surface of the frame body 21a and the other side (second side) which is a free end located on the opposite side from the inner surface of the frame body 21a. In this embodiment, three protrusions 23aD are fixed to the frame body 21a at 120-degree intervals along the axial direction of the central axis of the device main body 21.

When the lamp 10 is attached to the fixture body 21, the lamp 10 is rotated inside the fixture body 21, causing the bent protrusions 23aD to deform and stretch in the direction of rotation of the lamp 10. Specifically, the other side of the free end of the wrapped metal plate is pressed by the lamp 10, causing it to deform and stretch in the direction of rotation. As a result, the tips of the free ends of the protrusions 23aD come into contact with the side of the lamp 10. In this case, the protrusions 23aD are elastically deformed, so when the lamp 10 is removed from the socket 22, the protrusions 23aD return to their original state due to their elastic restoring force. Therefore, the lamp 10 can be replaced many times.

As described above, lighting fixture 1D according to this embodiment, like embodiment 1 above, includes mounting fixture 20D to which lamp 10 is removably attached. Mounting fixture 20D has fixture body 21, socket 22, and heat dissipation mechanism 23D provided on the inner surface of fixture body 21, with heat dissipation mechanism 23D in contact with lamp 10.

This configuration allows the heat generated by the lamp 10 to be efficiently dissipated without compromising the ease of lamp 10 replacement.

Furthermore, in the lighting fixture 1D of this embodiment, the protrusions 23aD that constitute the heat dissipation mechanism 23D deform in a direction perpendicular to the central axis of the fixture body 21.

This configuration allows the protrusion 23aD to be elastically deformed in a direction perpendicular to the central axis of the instrument body 21 (radial direction).

Furthermore, in the lighting fixture 1D of this embodiment, multiple protrusions 23aD are provided along the circumferential direction of the inner surface of the fixture body 21. Each of the multiple protrusions 23aD is a folded plate-shaped member, and by rotating the lamp 10 when installing the lamp 10 in the fixture body 21, the folded multiple protrusions 23aD deform so as to extend in the rotational direction of the lamp 10.

With this configuration, the rotation of the lamp 10 when it is attached to the mounting fixture 20D is used to elastically deform the multiple protrusions 23aD, allowing the lamp 10 to come into contact with the multiple protrusions 23aD.

(Modification)
Although the lighting fixture according to the present disclosure has been described above based on the embodiments, the present disclosure is not limited to the above-described embodiments.

For example, in the above embodiments 1 to 3, the protrusions 23a to 23aD are made of a metal material, but this is not limited to this. The protrusions 23a to 23aD may be made of a non-metallic material such as a resin material, as long as it has high thermal conductivity. In this case, the protrusions 23a to 23aD should be made of an elastically deformable material such as an elastomer. Furthermore, the thermal conductivity of the protrusions 23a to 23aD should be higher than the thermal conductivity of the housing 11 of the lamp 10 so that heat from the lamp 10 is efficiently conducted to the protrusions 23a to 23aD.

Furthermore, in the above embodiments 1 to 3, the lamp 10 is an LED lamp having an LED light source, but this is not limited to this. For example, the lamp 10 may be a fluorescent lamp, a halogen lamp, etc.

Furthermore, in the above embodiments 1 to 3, the lamp 10 is a flat-type lamp with a GX53-type base, but this is not limited to this. For example, the lamp 10 may be a lamp with a GH76p-type or GH69h-type base, or may be a lamp other than a flat-type. The lamp 10 may also be a bulb-type lamp with an E-type base (E-base). In this case, the socket 22 of the mounting fixture 20 has a threaded portion into which the E-base is fitted.

In addition, this disclosure also includes forms obtained by applying various modifications that a person skilled in the art would conceive of to the above-described embodiments and modifications, and forms realized by arbitrarily combining the components and functions of the embodiments and modifications within the scope of the present disclosure. This disclosure also includes any combination of two or more claims from among the multiple claims set forth in the claims at the time of filing, to the extent that there is no technical contradiction. For example, when a dependent-form claim set forth in the claims at the time of filing is made into a multiple claim or multiple-multiple claim that cites all of the superordinate claims within the scope of the technical contradiction, this disclosure also includes all combinations of claims included in that multiple claim or multiple-multiple claim.

The technology disclosed herein can be widely used in lighting fixtures such as downlights that have a mounting fixture to which a lamp is attached. In particular, the technology disclosed herein is useful as a recessed lighting fixture that is installed by being embedded in a building material such as a ceiling.

REFERENCE SIGNS LIST 1, 1B, 1D Lighting fixture 10 Lamp 11 Housing 12 Light-emitting section 13 Light-transmitting cover 14 Power supply pin 15 Power supply section 16 Protrusion 20, 20B, 20D Mounting fixture 21 Fixture body 21a Frame 21b Top plate 22 Socket 22a Pin receiving hole 22b Recess 23, 23A, 23B, 23C, 23D Heat dissipation mechanism 23a, 23aA, 23aB, 23aC, 23aD Protrusion 100 Ceiling 101 Through hole

Claims (10)

A fixture is provided to which the lamp is attached and which is recessed into the ceiling;
The mounting fixture has a fixture body and a heat dissipation mechanism provided on an inner surface of the fixture body,
the heat dissipation mechanism is in contact with the lamp;
Lighting fixtures. the heat dissipation mechanism is at least one protrusion,
the at least one protrusion has a tip that contacts a side surface of the lamp;
10. The lighting fixture of claim 1. The at least one protrusion protrudes from an inner surface of the tool body toward the inside of the tool body.
3. A lighting fixture according to claim 2. The at least one protrusion is elastically deformable.
4. A lighting fixture according to claim 3. The lamp is configured to be inserted into the fixture body in a first direction when attached to the fixture body,
the at least one protrusion is deformable in the first direction;
5. A lighting fixture according to claim 4. the at least one protrusion comprises a plurality of protrusions;
The plurality of protrusions are arranged along the axial direction of the central axis of the instrument body.
6. A lighting fixture according to claim 5. The at least one protrusion deforms in a direction perpendicular to the central axis of the instrument body.
4. A lighting fixture according to claim 3. the at least one protrusion comprises a plurality of protrusions;
The plurality of protrusions are provided along a circumferential direction of an inner surface of the tool body,
each of the plurality of protrusions is a bent plate-like member,
When the lamp is attached to the fixture body, the lamp is rotated, so that the bent protrusions are deformed so as to extend in the rotation direction of the lamp.
8. A lighting fixture according to claim 7. The lamp has a base,
The mounting fixture has a socket to which the base of the lamp is detachably attached.
A lighting fixture according to any one of claims 1 to 8. The lamp has an LED light source.
A lighting fixture according to any one of claims 1 to 8.