JP2017212080A - Led unit and lighting fixture including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED unit capable of controlling light distribution with a relatively simple configuration and to provide a lighting fixture including the LED unit.SOLUTION: An LED unit 10 includes: a base 1; a light emitting device 3 arranged on one surface side of the base 1; a lighting device 2 for lighting the light emitting device 3; a connection terminal 4 for electrically connecting the light emitting device 3 and the lighting device 2; and a translucent cover 7 attached to the base 1 so as to cover the light emitting device 3. A wiring board 2a of the lighting device 2 is arranged to face a mounting board 3b of the light emitting device 3 in the thickness direction. The wiring board 2a has an opening 2aa penetrating in the thickness direction and controlling light distribution of light from the light emitting device 3. The connection terminal 4 applies an elastic force toward the direction in which the mounting board 3b and the wiring board 2a are separated from each other. The cover 7 supports the wiring board 2a and is configured so that the distance between the mounting board 3b and the wiring board 2a can be relatively displaced in the thickness direction of the wiring board 2a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an LED unit and a lighting fixture including the same.

  Conventionally, an LED unit has been used as a light source of a lighting fixture.

  As a light-emitting device that can be used for this type of LED unit, a configuration including a circuit board, a light-emitting element, a wiring board, and a lens member is known (for example, Patent Document 1).

  In the configuration of Patent Document 1, the light emitting element is mounted on a circuit board. The circuit board has a wiring pattern. The wiring board has a pattern for electrical conduction. The electrical conduction pattern on the wiring board is electrically connected to the wiring pattern on the circuit board. The wiring board has a hole. The lens member collects or diffuses light emitted from the light emitting element. Part of the lens member is fitted into a hole formed in the wiring board, and the relative position between the lens member and the wiring board is positioned. In Patent Document 1 described above, changing the relative position between the lens member and the wiring board is not disclosed.

JP 2010-3968 A

  By the way, the LED unit is required to have a configuration capable of controlling the light distribution with a relatively simple configuration, and the configuration using the above-described Patent Document 1 is not sufficient, and further improvement is required.

  The objective of this invention provides the LED unit which can control light distribution by a comparatively simple structure, and a lighting fixture provided with the same.

  The LED unit of one aspect according to the present invention includes a base, a light emitting device, a lighting device, a connection terminal, and a cover. The light emitting device is disposed on one surface side of the base. The lighting device lights the light emitting device. The connection terminal electrically connects the light emitting device and the lighting device. The cover has translucency. The cover is attached to the base so as to cover the light emitting device. The light emitting device includes an LED chip, a mounting substrate, and a first terminal portion. The LED chip is mounted on the mounting substrate. The first terminal portion is electrically connected to the LED chip. As for the said mounting substrate, the said LED chip and the said 1st terminal part are arrange | positioned on the 1st surface. The lighting device includes a wiring board, an electronic component, and a second terminal portion. The wiring board is disposed to face the mounting board in the thickness direction. The electronic component constitutes a lighting circuit. The lighting circuit controls lighting of the light emitting device. The second terminal portion is electrically connected to the electronic component. As for the said wiring board, the said electronic component and the said 2nd terminal part are arrange | positioned on the 2nd surface. The wiring board has an opening. The opening penetrates in the thickness direction of the wiring board. The opening controls light distribution of light emitted from the light emitting device. The connection terminal has a first end and a second end. The first end portion is electrically connected to the first terminal portion of the mounting board. The second end portion is electrically connected to the second terminal portion of the wiring board. The connection terminal applies an elastic force in a direction in which the mounting substrate and the wiring substrate are separated from each other. The cover supports the wiring board. The cover is configured to relatively displace the distance between the mounting substrate and the wiring substrate in the thickness direction of the wiring substrate.

  The lighting fixture of 1 aspect which concerns on this invention is equipped with the said LED unit mentioned above, and the fixture main body to which the said LED unit is attached.

  The LED unit of the present invention and the lighting fixture including the LED unit can control light distribution with a relatively simple configuration.

FIG. 1 is an exploded perspective view of a front side showing an LED unit according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the back side of the LED unit. FIG. 3 is a cross-sectional view showing the LED unit. FIG. 4 is a perspective view showing a main part of the LED unit of the modified example. FIG. 5 is a side view showing a main part of an LED unit of another modified example. FIG. 6 is a perspective view showing a main part of an LED unit of another modified example of the above. FIG. 7 is a cross-sectional view of a lighting fixture including the LED unit.

  Below, the LED unit 10 of this embodiment is demonstrated with reference to FIG. In the figure, the same reference numerals are assigned to the same members, and duplicate descriptions are omitted. The size and positional relationship of the members shown in each drawing may be exaggerated for clarity of explanation. In the following description, each element included in the present embodiment may be configured such that a plurality of elements are configured by one member and the plurality of elements are shared by one member. You may implement | achieve by sharing with a member.

  As shown in FIGS. 1 to 3, the LED unit 10 of the present embodiment includes a base 1, a light emitting device 3, a lighting device 2, a connection terminal 4, and a cover 7. The light emitting device 3 is disposed on one surface side of the base 1. The lighting device 2 lights the light emitting device 3. The connection terminal 4 electrically connects the light emitting device 3 and the lighting device 2. The cover 7 has translucency. The cover 7 is attached to the base 1 so as to cover the light emitting device 3. The light emitting device 3 includes an LED chip 3a, a mounting substrate 3b, and a first terminal portion 3c. The LED chip 3a is mounted on the mounting substrate 3b. The first terminal portion 3c is electrically connected to the LED chip 3a. In the mounting substrate 3b, the LED chip 3a and the first terminal portion 3c are arranged on the first surface 3ba. The lighting device 2 includes a wiring board 2a, an electronic component 2b, and a second terminal portion 2c. The wiring board 2a is disposed to face the mounting board 3b in the thickness direction. The electronic component 2b constitutes a lighting circuit. The lighting circuit controls lighting of the light emitting device 3. The second terminal portion 2c is electrically connected to the electronic component 2b. As for the wiring board 2a, the electronic component 2b and the 2nd terminal part 2c are arrange | positioned at the 2nd surface 2ab. The wiring board 2a has an opening 2aa. The opening 2aa penetrates in the thickness direction of the wiring board 2a. The opening 2aa controls the light distribution of the light emitted from the light emitting device 3. The connection terminal 4 has a first end 4a and a second end 4b. The first end portion 4a is electrically connected to the first terminal portion 3c of the mounting substrate 3b. The second end portion 4b is electrically connected to the second terminal portion 2c of the wiring board 2a. The connection terminal 4 gives an elastic force in a direction in which the mounting substrate 3b and the wiring substrate 2a are separated from each other. The cover 7 supports the wiring board 2a. The cover 7 is configured to relatively displace the distance between the mounting substrate 3b and the wiring substrate 2a in the thickness direction of the wiring substrate 2a.

  In the LED unit 10 of the present embodiment, the opening 2aa defines the light distribution of the light emitted from the light emitting device 3, and the cover 7 determines the distance between the mounting board 3b and the wiring board 2a in the thickness direction of the wiring board 2a. Light distribution can be controlled with a relatively simple configuration that can be displaced relatively.

  Below, each structure of the LED unit 10 of this embodiment is demonstrated.

  In addition to the base 1, the lighting device 2, the light emitting device 3, the connection terminal 4, and the cover 7, the LED unit 10 of this embodiment includes an electric wire 5 and a receptacle connector 6, as shown in FIG. .

  The base 1 has a bottomed cylindrical outer shape. As shown in FIGS. 1 to 3, the base 1 has a bottom wall portion 1a, a peripheral wall portion 1b, and a male screw portion 1c. The bottom wall 1a has a disc-like outer shape. As shown in FIG. 2, the bottom wall portion 1 a has a through hole 1 aa that penetrates in the thickness direction. The through hole 1aa has a rectangular outer shape in the rear view. The peripheral wall 1b has a cylindrical outer shape. The male screw portion 1c is provided on the peripheral wall portion 1b. The external thread part 1c is arrange | positioned along the outer peripheral surface of the surrounding wall part 1b.

  The base 1 is formed by, for example, aluminum die casting. The material of the base 1 is not limited to aluminum but may be, for example, copper or stainless steel. In the base 1, a bottom wall portion 1a, a peripheral wall portion 1b, and a male screw portion 1c are integrally formed. The base 1 has not only a configuration in which the bottom wall portion 1a, the peripheral wall portion 1b, and the male screw portion 1c are integrally formed, but also the peripheral wall portion 1b and the male screw portion 1c are integrally formed, and the bottom wall portion 1a The structure in which the surrounding wall part 1b is formed separately may be sufficient.

  The lighting device 2 includes a wiring board 2a, an electronic component 2b, and a second terminal portion 2c, and a lighting circuit for lighting the LED chip 3a is formed. The wiring board 2a has an outer shape of an annular flat plate. The wiring board 2a is provided with an opening 2aa at the center. The opening 2aa penetrates in the thickness direction of the wiring board 2a. The opening 2aa has a circular shape when viewed from the front. The wiring board 2a is formed in, for example, an annular flat plate shape or a flat frame shape. The wiring board 2a has wiring. The wiring is formed in a predetermined shape. The wiring is, for example, a copper foil. A plurality of types of electronic components 2b are mounted on the wiring board 2a. The wiring board 2a electrically connects multiple types of electronic components 2b by wiring.

  The wiring board 2a is, for example, a glass cloth base epoxy resin. Hereinafter, the glass cloth base epoxy resin is also referred to as a glass epoxy substrate. The wiring board 2a is not limited to a glass epoxy board, but may be a metal base printed wiring board or a ceramic board.

  The plural types of electronic components 2b are, for example, a transformer, a diode, a capacitor, a switching element, and a drive IC (Integrated Circuit) that controls switching of the switching element. The plural types of electronic components 2b are provided on the second surface 2ab of the wiring board 2a.

  The lighting circuit is configured by appropriately electrically connecting a plurality of types of electronic components 2b. The lighting circuit generates lighting power for the LED chip 3a. The lighting circuit includes a step-up chopper circuit and a step-down chopper circuit. The lighting circuit rectifies an AC voltage from an external power source such as a commercial AC power source into a DC voltage. The lighting circuit steps up and down the rectified DC voltage, and outputs a current that matches a predetermined target value. The lighting circuit is not limited to a configuration including a step-up chopper circuit and a step-down chopper circuit. The lighting circuit only needs to be able to control the lighting of the light emitting device 3, and may be a circuit having only a current limiting resistor for controlling the current flowing through the LED chip 3a.

  Each of the pair of second terminal portions 2c is provided on the second surface 2ab of the wiring board 2a. The pair of second terminal portions 2c is electrically connected to the wiring of the wiring board 2a. Each of the pair of second terminal portions 2c is made of a conductor. The second terminal portion 2c may be configured integrally with the wiring of the wiring board 2a or may be configured separately. The lighting device 2 is electrically connected to an electric wire 5 having a receptacle connector 6 at the tip.

  As shown in FIGS. 1 and 3, the light emitting device 3 includes a sealing portion 3d in addition to the LED chip 3a, the mounting substrate 3b, and the pair of first terminal portions 3c. The LED chip 3a is, for example, a blue LED chip. The LED chip 3a is mounted on the first surface 3ba of the mounting substrate 3b. The LED chip 3a is not limited to one, and a plurality of LED chips 3a may be mounted on the mounting substrate 3b.

  The mounting substrate 3b has a rectangular flat plate-like outer shape. The mounting substrate 3b has a predetermined shape of wiring. The wiring is, for example, a copper foil. The mounting substrate 3b electrically connects the LED chip 3a and the first terminal portion 3c by wiring. When a plurality of LED chips 3a are mounted on the mounting substrate 3b, the plurality of LED chips 3a are electrically connected in series by wiring. The mounting substrate 3b is not limited to a configuration in which a plurality of LED chips 3a are electrically connected in series by wiring. The mounting substrate 3b may be electrically connected in parallel with a plurality of LED chips 3a by wiring, or may be connected in series and parallel. The mounting substrate 3b has a reflective film provided on the first surface 3ba. The reflective film is, for example, a white resist film. The resist film covers the entire first surface 3ba except for the wiring pad on which the LED chip 3a is mounted and the pair of first terminal portions 3c. The resist film suppresses the light emitted from the LED chip 3a from being absorbed by the mounting substrate 3b. The mounting substrate 3b is, for example, a metal base printed wiring board. The mounting substrate 3b is not limited to a metal base printed wiring board, and may be a ceramic substrate or a glass epoxy substrate, for example.

  Each of the pair of first terminal portions 3c is provided on the first surface 3ba of the mounting substrate 3b. The pair of first terminal portions 3c are electrically connected to the wiring of the mounting substrate 3b so that power can be supplied to the LED chip 3a. Each of the pair of first terminal portions 3c is made of a conductor. The 1st terminal part 3c may be comprised integrally with the wiring of the mounting board | substrate 3b, and may be comprised separately.

  The sealing portion 3d is provided on the first surface 3ba of the mounting substrate 3b. The sealing part 3d covers the LED chip 3a. The sealing part 3d is formed of a translucent sealing material. The sealing portion 3d has a lens function. Examples of the translucent sealing material include silicone resin, epoxy resin, and glass. The sealing part 3d contains a phosphor in a translucent sealing material. Examples of the phosphor include a yellow phosphor that is excited by blue light emitted from a blue LED chip and emits yellow light. The light emitting device 3 emits white light by the mixed color light of the blue light from the blue LED chip and the yellow light from the yellow phosphor. In other words, the light emitting device 3 constitutes a white LED.

  The phosphor of the light emitting device 3 is not limited to a yellow phosphor, and may be a red phosphor and a green phosphor, for example. The light emitting device 3 may be a white LED in which an ultraviolet LED chip is combined with a red phosphor, a green phosphor, and a blue phosphor. The light emitting device 3 may be a white LED in which a red LED chip, a green LED chip, and a blue LED chip are combined. The light emitting device 3 is disposed so that the mounting substrate 3b faces the wiring substrate 2a of the lighting device 2.

  A pair of connection terminals 4 is provided as shown in FIGS. Each of the pair of connection terminals 4 has a long outer shape. The pair of connection terminals 4 are formed in the same configuration. Each connection terminal 4 is formed of a metal plate.

  Each connection terminal 4 has a connecting portion 4c in addition to a first end 4a and a second end 4b. The first end 4 a is provided at one end in the longitudinal direction of the connection terminal 4. The first end 4a has a rectangular flat plate outer shape. The second end 4 b is provided at the other end opposite to one end of the connection terminal 4 in the longitudinal direction. The second end 4b has a rectangular flat plate outer shape. The connecting portion 4c connects the first end 4a and the second end 4b. The connecting portion 4c has a zigzag outer shape when viewed from the side. The connecting portion 4c has a zigzag outer shape, thereby forming a compression spring. The connection terminal 4 can apply an elastic force in a direction in which the first end 4a and the second end 4b are separated in a compressed state.

  The connection terminal 4 is electrically connected to the light emitting device 3 when the first end portion 4a is in contact with the first terminal portion 3c of the mounting substrate 3b. Of the pair of connection terminals 4, the first end 4 a of one connection terminal 4 is electrically connected to the first terminal 3 c on the anode side of the light emitting device 3. Of the pair of connection terminals 4, the first end portion 4 a of the other connection terminal 4 is electrically connected to the first terminal portion 3 c on the cathode side of the light emitting device 3. The connection terminal 4 is electrically connected to the lighting device 2 when the second end portion 4b is in contact with the second terminal portion 2c of the wiring board 2a. The connection terminal 4 is disposed between the wiring board 2a and the mounting board 3b. Each connection terminal 4 is formed by punching and bending a metal plate. Examples of the material of the connection terminal 4 include phosphor copper, brass, or copper plated with silver.

  The electric wire 5 includes a core wire and an insulation coating. The material of the core wire is a metal material such as copper, for example. The material of the insulation coating is, for example, vinyl chloride. Two electric wires 5 are provided so that power can be supplied to the lighting device 2. One end of each electric wire 5 is electrically connected to the wiring of the wiring board 2a. A receptacle connector 6 is provided at the other end opposite to one end of each electric wire 5.

  As shown in FIG. 2, the receptacle connector 6 is exposed to the outside from the through hole 1aa of the base 1. The receptacle connector 6 is inserted with a plug electrically connected to an external power source. The receptacle connector 6 is configured such that a plug is inserted from the thickness direction of the base 1. The receptacle connector 6 is configured to be electrically and mechanically connected to the plug. The receptacle connector 6 supplies power from the external power source to the lighting device 2 via the electric wire 5.

  As shown in FIGS. 1 to 3, the cover 7 has a bottomed cylindrical outer shape as a whole. The cover 7 transmits light emitted from the light emitting device 3. The cover 7 includes a cover main body 7a, a cover portion 7b, and a female screw portion 7c.

  The cover body 7a has a bottomed cylindrical outer shape. The cover body 7a has a light emitting portion 7h and a first peripheral wall 7j. The light emitting portion 7h has a disk-like outer shape. The light emitting unit 7h emits light from the light emitting device 3 to the outside. The first peripheral wall 7j has a cylindrical outer shape. The first peripheral wall 7j is provided along the periphery of the light emitting portion 7h. One end side of the first peripheral wall 7j is closed with a light emitting portion 7h. The first peripheral wall 7j is formed so as to be smoothly continuous with the light emitting portion 7h.

  The cover part 7b has the collar part 7k and the 2nd surrounding wall 7m. The flange portion 7k has an outer shape of an annular flat plate shape. The flange portion 7k is configured to contact the peripheral portion of the wiring board 2a. The flange portion 7k is in contact with the side opposite to the second surface 2ab of the wiring board 2a on which the electronic component 2b is mounted.

  In the state in which the cover 7 is attached to the base 1, the flange portion 7 k is pressed against the wiring board 2 a by the elastic force of the connection terminal 4. In other words, the flange portion 7k of the cover 7 supports the wiring board 2a.

  The second peripheral wall 7m has a cylindrical outer shape. The second peripheral wall 7m has a larger outer shape than the first peripheral wall 7j in a front view. 7 m of 2nd surrounding walls protrude from the outer periphery of the collar part 7k along the thickness direction of the collar part 7k. The second peripheral wall 7m protrudes in the opposite direction to the first peripheral wall 7j along the thickness direction of the flange portion 7k.

  The female screw portion 7c is provided on the second peripheral wall 7m. The female screw portion 7c is disposed along the inner surface of the second peripheral wall 7m. The female screw portion 7c is configured to be screwed with the male screw portion 1c. The cover 7 is attached to the base 1 by screwing the female screw portion 7c with the male screw portion 1c.

  Between the cover 7 and the base 1, a lighting device 2, a light emitting device 3, a pair of connection terminals 4, an electric wire 5, and a receptacle connector 6 are disposed. When the cover 7 is attached to the base 1, the light-emitting device 3, the connection terminal 4, and the lighting device 2 are connected so that the connection terminal 4 gives an elastic force in a direction in which the light-emitting device 3 and the lighting device 2 are separated from each other. Hold between the base 1. The cover 7 supports the wiring board 2 a while being attached to the base 1. The wiring board 2 a is exposed to the LED chip 3 a of the light emitting device 3 from the opening 2 aa while being attached to the base 1.

  The cover 7 is integrally formed with a cover main body 7a, a cover portion 7b, and a female screw portion 7c. The cover 7 is made of a light transmissive material. Examples of the translucent material of the cover 7 include acrylic resin, polycarbonate resin, and glass. The cover 7 can be formed by injection molding, for example.

  Hereinafter, it will be described that the light distribution can be controlled with a relatively simple configuration of the LED unit 10 of the present embodiment.

  By the way, there are various types of LED units in the light emitting device, and when trying to obtain the same orientation characteristics with different types of light emitting devices, the structure of the LED unit or the optics corresponding to the different types of light emitting devices. Parts may need to be replaced.

  In the LED unit 10 of the present embodiment, as shown in FIG. 3, the wiring board 2a is arranged facing the mounting board 3b. The LED unit 10 emits light from the light emitting device 3 through the opening 2aa. In FIG. 3, the light of the light-emitting device 3 is illustrated with a dashed-dotted arrow. In the LED unit 10, the wiring board 2 a around the opening 2 aa blocks a part of the light emitted from the light emitting device 3. In other words, the opening 2aa controls the light distribution of the light from the light emitting device 3. The LED unit 10 can control the light distribution by changing the light transmitted through the opening 2aa by relatively displacing the distance between the wiring board 2a and the mounting board 3b.

  In the LED unit 10, when the tightening of the female screw portion 7 c and the male screw portion 1 c is strengthened with the cover 7 attached to the base 1, the wiring substrate 2 a approaches the mounting substrate 3 b in the thickness direction of the wiring substrate 2 a. It is displaced to. The LED unit is displaced so that the wiring board 2a is separated from the mounting board 3b in the thickness direction of the wiring board 2a when the screwing of the female screw part 7c and the male screw part 1c is loosened with the cover 7 attached to the base 1. To do. In FIG. 3, the direction of displacement of the wiring board 2a with respect to the mounting board 3b is illustrated by a white arrow.

  The LED unit 10 of the present embodiment does not need to change optical components for different types of light emitting devices, and can control light distribution with a relatively simple configuration. In the LED unit 10 of the present embodiment, since the wiring board 2a is arranged to face the mounting board 3b, it is possible to suppress heat from the mounting board 3b from directly transferring to the wiring board 2a. In the LED unit 10, since the wiring board 2a is disposed to face the mounting board 3b, it is possible to suppress heat from the wiring board 2a from being directly transferred to the mounting board 3b.

  In the LED unit 10 of the present embodiment, the connection terminal 4 is preferably a leaf spring.

  In the LED unit 10 of this embodiment, since the connection terminal 4 is a leaf spring, even if the relative position between the mounting board 3b and the wiring board 2a is displaced, the electrical connection between the mounting board 3b and the wiring board 2a. Connection can be made.

  When the first end 4a and the light emitting device 3 are connected to each other by the solder, the connection terminal 4 is a metal plate, so that the solder connection tends to be difficult due to heat dissipation of the metal plate. In the LED unit 10 of the present embodiment, the mounting substrate 3b and the wiring substrate 2a are provided with an elastic force in a direction away from each other, so that the first end portion 4a and the first terminal portion 3c and the second end portion are provided. The electrical connection reliability between the part 4b and the second terminal part 2c can be increased.

  The LED unit 10 of the present embodiment can release the electrical connection between the mounting board 3b and the wiring board 2a with the cover 7 removed from the base 1 because the connection terminal 4 is a leaf spring. Since the LED unit 10 can release the electrical connection between the mounting substrate 3b and the wiring substrate 2a, it is possible to prevent the operator from directly viewing the light from the light emitting device 3.

  In the LED unit 10 of the present embodiment, the electrical shape between the first end portion 4a and the first terminal portion 3c and between the second end portion 4b and the second terminal portion 2c is determined by the spring shape that gives elastic force. Since it is possible to make a simple connection relatively easily, assembly workability can be improved.

  Next, the structure of the modification of the LED unit 10 of this embodiment is demonstrated based on the principal part shown in FIGS.

  The first modification shown in FIG. 4 has the same configuration as the LED unit 10 of the present embodiment, except that the connection terminal 4 is configured by a coil spring.

  In the configuration of the first modification, since the connection terminal 4 is configured by a coil spring, it is relatively easy to adjust the magnitude of the elastic force in the direction in which the mounting substrate 3b and the wiring substrate 2a are separated. .

  That is, in the LED unit 10 of the modification of this embodiment, it is preferable that the connection terminal 4 is a coil spring.

  In the second modification shown in FIGS. 5 and 6, the connection terminal 4 has the same configuration as that of the LED unit 10 of the present embodiment except that the connection terminal 4 includes a pin 4d and a clamping portion 4e instead of the leaf spring. .

  In the second modification, the connection terminal 4 includes a pin 4d and a sandwiching portion 4e. One end of the pin 4d is electrically connected to the first terminal portion 3c. The other end of the pin 4d protrudes in the thickness direction of the mounting substrate 3b. One end of the clamping part 4e is electrically connected to the second terminal part 2c. It is preferable that the pinching part 4e pinches the pin 4d from the direction where the other end intersects the protruding direction of the pin 4d.

  In the second modification, the pinching portion 4e sandwiches the pin 4d from the direction intersecting the projecting direction of the pin 4d. Therefore, when the cover 7 is screwed to the base 1, both the mounting board 3b and the wiring board 2a are rotated around. The accompanying poor electrical contact can be suppressed. In the second modification, the mounting substrate 3b has an insertion hole 2ba that penetrates in the thickness direction. The pin 4d is inserted through the insertion hole 2ba.

  In the second modification, the other end of the pin 4d protrudes in the thickness direction of the mounting substrate 3b, and the other end of the clamping portion 4e is not limited to the configuration in which the pin 4d is sandwiched. In the second modification, the other end of the pin 4d may protrude in the thickness direction of the wiring board 2a, and the other end of the holding portion 4e may sandwich the pin 4d.

  That is, in the LED unit 10, the connection terminal 4 includes a pin 4 d and a clamping part 4 e. One end of the pin 4d is electrically connected to the second terminal portion 2c. The other end of the pin 4d protrudes in the thickness direction of the wiring board 2a. One end of the clamping part 4e is electrically connected to the first terminal part 3c. The sandwiching portion 4e may be configured to sandwich the pin 4d from the direction where the other end intersects the protruding direction of the pin 4d.

  Below, the assembly process of the LED unit 10 is demonstrated.

  In the assembly process of the LED unit 10, the light emitting device 3 is placed on the bottom wall 1 a of the base 1. The light emitting device 3 is not limited to the configuration that is directly placed on the bottom wall 1a. The light emitting device 3 may be placed on the base 1 via a heat dissipation sheet. The heat dissipation sheet efficiently dissipates heat generated in the light emitting device 3 to the base 1. The heat radiation sheet has electrical insulation and thermal conductivity. The heat-dissipating sheet is more preferably a gel-like elastomer material that is gel-like, has a low crosslinking density, is soft and has elasticity. Examples of the heat dissipation sheet include a silicone gel sheet. The heat dissipation sheet is not limited to the silicone gel sheet, and may be formed of a material having excellent electrical insulation and thermal conductivity.

  When the light emitting device 3 is placed on the base 1 via the heat dissipation sheet, the base 1 may have a rectangular frame-shaped positioning projection on the bottom wall portion 1a. The positioning protrusion protrudes outward from the bottom wall portion 1a along the thickness direction of the bottom wall portion 1a. The positioning protrusion has a rectangular outer shape when viewed from the front. The height dimension of the positioning protrusion is set to be larger than the thickness dimension of the heat dissipation sheet.

  Next, the connection terminals 4 and the wiring board 2a are arranged so that the pair of connection terminals 4 are sandwiched between the mounting board 3b and the wiring board 2a. An electronic component 2b is mounted in advance on the wiring board 2a. An electric wire 5 is electrically connected to the wiring board 2a in advance. With the pair of connection terminals 4 sandwiched between the mounting substrate 3b and the wiring substrate 2a, the opening 2aa of the wiring substrate 2a exposes the sealing portion 3d of the light emitting device 3 in a front view. As for the connection terminal 4, the 1st end part 4a is arrange | positioned on the 1st terminal part 3c of the mounting substrate 3b. The connection terminal 4 and the first terminal portion 3c of the mounting substrate 3b are electrically connected. As for the connection terminal 4, the 2nd end part 4b is arrange | positioned on the 2nd terminal part 2c of the wiring board 2a. The connection terminal 4 and the second terminal portion 2c of the wiring board 2a are electrically connected.

  In the assembly process, the cover 7 is attached to the base 1 in a state where the pair of connection terminals 4 are sandwiched between the mounting board 3b and the wiring board 2a. The cover 7 is attached to the base 1 by screwing the female screw portion 7 c of the cover 7 into the male screw portion 1 c of the base 1. In a state where the cover 7 is attached to the base 1, the first end portion 4a applies an elastic force to the first terminal portion 3c. In a state where the cover 7 is attached to the base 1, the second end portion 4b applies an elastic force to the second terminal portion 2c. Finally, the LED unit 10 adjusts the depth at which the cover 7 is screwed into the base 1 to control the light distribution.

  Next, the lighting fixture 12 including the LED unit 10 will be briefly described with reference to FIG. The luminaire 12 shown in FIG. 7 is a downlight that is embedded in the ceiling material 17.

  The lighting fixture 12 includes an LED unit 10 and a fixture main body 11 to which the LED unit 10 is attached.

  The instrument main body 11 has a main body part 11a, an outer collar part 11b, a bottom part 11c, and a power supply accommodating part 11e. The main body 11a has a cylindrical outer shape. The outer flange portion 11b extends outward from the opening edge of the main body portion 11a.

  The LED unit 10 is accommodated in the main body 11a. The LED unit 10 is placed on the bottom 11c. The bottom part 11c has a disk-like outer shape. The bottom part 11c closes one end of the cylindrical main body part 11a. The bottom part 11c has a connection hole 11ca penetrating in the thickness direction. The connection hole 11ca exposes the receptacle connector 6 of the LED unit 10 to the outside.

  In the main body 11a, a power storage 11e is disposed on the opposite side via the bottom 11c. The power storage unit 11e has a cylindrical outer shape. As for the power storage part 11e, the cylindrical end is closed by the bottom part 11c. The power storage unit 11e stores and arranges the power supply unit 15. The power supply unit 15 is electrically connected to the power supply line 13. A connector plug 14 is provided at the tip of the power line 13. The power supply unit 15 is configured to be able to supply power for lighting the LED unit 10 via the power supply line 13 and the connector plug 14. The power supply unit 15 may be a terminal block that is electrically connected to an external power supply, or may be a storage battery that supplies power to the LED unit 10.

  The power supply unit 15 is arranged away from the power supply storage portion 11e. The lighting fixture 12 suppresses heat conduction between the power supply unit 15 and the LED unit 10 by arranging the power supply unit 15 and the power supply housing portion 11e apart from each other. The lighting fixture 12 is electrically connected to the receptacle connector 6 by inserting the connector plug 14 of the power supply unit 15 into the connection hole 11ca.

  In the LED unit 10, the receptacle connector 6 exposed from the through hole 1aa of the base 1 is detachably connected to the connector plug 14 of the power supply unit 15. Since the lighting fixture 12 constitutes a connector to which the connector plug 14 of the power supply unit 15 and the LED unit 10 can be detachably connected, connection work when the LED unit 10 is attached or detached can be easily performed.

  The instrument main body 11 is embedded in an embedding hole 17 a provided in the ceiling material 17. The instrument body 11 may include an attachment spring. The mounting spring sandwiches the peripheral portion of the embedding hole 17a in the ceiling material 17 with the outer flange portion 11b. The instrument main body 11 is attached to the ceiling member 17 such that the outer flange portion 11b abuts on the peripheral portion of the embedding hole 17a on the lower surface of the ceiling member 17.

  The instrument body 11 is made of a metal material. The lighting fixture 12 can efficiently dissipate heat generated in the light emitting device 3 of the LED unit 10 to the outside through the base 1 through the metallic fixture body 11 compared to the resin fixture body 11. An example of the material of the instrument body 11 is aluminum. The material of the instrument body 11 is not limited to aluminum, and may be, for example, copper or ceramics.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea according to the present invention.

DESCRIPTION OF SYMBOLS 1 Base 2 Lighting apparatus 2a Wiring board 2aa Opening part 2ab 2nd surface 2b Electronic component 2c 2nd terminal part 3 Light-emitting device 3a LED chip 3b Mounting board 3ba 1st surface 3c 1st terminal part 4 Connection terminal 4a 1st edge part 4b 2nd end part 4d pin 4e clamping part 7 cover 10 LED unit 11 fixture body 12 lighting fixture

Claims (6)

A base, a light emitting device disposed on one surface side of the base, a lighting device that lights the light emitting device, a connection terminal that electrically connects the light emitting device and the lighting device, and covering the light emitting device A translucent cover attached to the base as described above,
The light-emitting device includes an LED chip, a mounting substrate on which the LED chip is mounted, and a first terminal portion that is electrically connected to the LED chip.
In the mounting substrate, the LED chip and the first terminal portion are arranged on a first surface,
The lighting device includes a wiring board disposed to face the mounting substrate in a thickness direction, an electronic component that constitutes a lighting circuit that controls lighting of the light emitting device, and a second terminal that is electrically connected to the electronic component. And
In the wiring board, the electronic component and the second terminal portion are arranged on a second surface,
The wiring board has an opening that penetrates in the thickness direction and controls light distribution of light emitted from the light emitting device;
The connection terminal includes a first end portion that is electrically connected to the first terminal portion of the mounting board, and a second end portion that is electrically connected to the second terminal portion of the wiring board. The mounting board and the wiring board are given an elastic force in a direction away from each other,
The LED unit is configured to support the wiring board and to relatively displace the distance between the mounting board and the wiring board in the thickness direction of the wiring board.   The LED unit according to claim 1, wherein the connection terminal is a leaf spring.   The LED unit according to claim 1, wherein the connection terminal is a coil spring.   The connection terminal has one end electrically connected to the first terminal portion and the other end protruding in the thickness direction of the mounting substrate, and one end electrically connected to the second terminal portion and the other end connected to the pin. The LED unit according to claim 1, further comprising: a sandwiching portion that sandwiches the pin from a direction that intersects the protruding direction.   The connection terminal has one end electrically connected to the second terminal portion and the other end protruding in the thickness direction of the wiring board, and one end electrically connected to the first terminal portion and the other end connected to the pin. The LED unit according to claim 1, further comprising: a sandwiching portion that sandwiches the pin from a direction that intersects the protruding direction.   The lighting fixture provided with the LED unit as described in any one of Claims 1-5, and the fixture main body to which the said LED unit is attached.

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