CN206694853U - Light source cell and the ligthing paraphernalia with light source cell - Google Patents

Abstract

In order to provide the light source cell with higher electrical reliability and the ligthing paraphernalia with the light source cell, light source cell (10) includes light source (1)；Installation component (4), light source (1) are attached on the first surface (4aa) of installation component (4), and installation component is made up of metal material；Supply unit (3), its be attached at installation component (4) on the second surface (4ab) of the opposite side of first surface (4aa) and be configured to provide electric power to light source (1)；With grounded metal retainer (6), it is attached on second surface (4ab) and is electrically connected to installation component (4).Grounded metal retainer (6) has the fixed part (6a) for being fixed to installation component (4) and the flat part (6b) kept by fixed part (6a).Flat part (6b) is arranged to electrically connect with gap as defined in the second surface (4ab) away from installation component (4) towards second surface (4ab) and with ground wire (8).

Description

Light source unit and lighting fixture with light source unit

technical field

The utility model generally relates to a light source unit and a lighting fixture with the light source unit, and more particularly relates to a light source unit with a power supply device and a lighting fixture with the light source unit.

Background technique

In related lighting fixtures, in order to avoid failure or damage caused by overvoltage, it can be grounded.

As this type of lighting fixture, there is known a configuration including a body, a unit mounted to the body, and a socket held by the body (for example, JP 2009-123686 A (hereinafter referred to as "Document 1")). The unit consists of a base on which the junction box and stabilizers are mounted. The socket is attached to the lamp socket.

In the lighting fixture of Document 1, the base of the unit is screwed to the body, thereby being grounded (grounded securely).

As another lighting fixture (lighting device), there is known a configuration in which a tubular lamp and a fixture body are provided (for example, WO 2011/122518 A1 (hereinafter referred to as "document 2")). The tubular lamp has a lamp body on which a light emitting element is arranged. The lamp body has a heat dissipation unit made of metal. The appliance body is provided with a wiring board. The lamp body is attached to the terminal block.

In the lighting fixture of Document 2, the tubular lamp has a power supply unit that supplies power to the light emitting element, and a ground unit. The ground part has a ground wire and a connector. In the ground section, a connector is attached to the top end of the ground wire. The base portion of the ground portion is fixed to the mounting base of the heat dissipation unit with screws. The ground part grounds the heat dissipation unit of the lamp body through the ground terminal of the wiring board provided on the fixture body.

In addition, a more reliable electrical configuration is required for the light source unit and a lighting fixture having the light source unit, and further improvements in the configurations of Documents 1 and 2 are required.

Utility model content

An object of the present invention is to provide a light source unit with higher electrical reliability and a lighting fixture with the light source unit.

A light source unit according to one embodiment of the present invention includes a light source, a mounting member, a power supply unit, and a grounded (grounded) metal holder. The mounting member is made of metal material. The light source is attached to the first surface of the mounting member. The power supply unit is attached to a second surface of the mounting member on the opposite side of the first surface. The power supply unit is configured to supply power to the light source. The grounded metal cage is attached to the second surface. The grounded metal cage is electrically connected to the mounting member. The grounded metal holder has a fixed portion and a flat plate portion. The fixing portion is fixed to the mounting member. The flat plate portion is held by the fixing portion. The flat plate portion is arranged to face the second surface with a prescribed gap from the second surface of the mounting member. The flat portion is electrically connected to the ground wire.

A lighting fixture in an embodiment of the present invention includes the above-mentioned light source unit and a fixture body. The appliance body holds the light source unit.

The light source unit and lighting fixture can have a more reliable electrical configuration.

Description of drawings

The drawings depict one or more implementations in accordance with the present teachings, by way of example only, and not limitation. In the drawings, the same or similar elements are denoted by the same reference numerals, in which:

Fig. 1 is a partially broken sectional view of a light source unit and a lighting fixture according to an embodiment of the present invention;

2 is a partially broken perspective view of the light source unit viewed from its back;

3 is an exploded perspective view of the lighting fixture viewed from its front;

Figure 4 is a perspective view from the front of the lighting fixture; and

FIG. 5 is a circuit diagram of a light source unit.

detailed description

Hereinafter, the light source unit 10 and the lighting fixture (lighting device) 30 according to the present embodiment will be described with reference to FIGS. 1 to 5 . In the figures, to avoid redundancy, elements of the same type are denoted by the same reference numerals. For convenience of illustration, the size and positional relationship of components in each drawing may be exaggerated. As an aspect of each element included in the embodiments to be described, the element may be constituted by one member such that the one member doubles as the elements, or the function of one member may be realized by a plurality of members.

As shown in FIGS. 1 to 3 , the light source unit 10 of this embodiment includes a light source 1 , a mounting member 4 , a power supply device 3 and a grounded (grounded) metal holder 6 . The mounting member 4 is made of metal material. The light source 1 is attached on the first surface 4aa of the mounting member 4 . The power supply device 3 is attached on the second surface 4ab of the mounting member 4 on the opposite side to the first surface 4aa. The power supply device 3 is configured to supply power to the light source 1 . A ground metal holder (ground mounting metal member) 6 is attached on the second surface 4ab. A grounded metal holder 6 is electrically connected to the mounting member 4 . The ground metal holder 6 has a fixing portion 6a and a flat plate portion 6b. The fixing portion 6 a is fixed to the mounting member 4 . The flat plate portion 6b is held by the fixing portion 6a. The flat plate portion 6b is arranged to face the second surface 4ab of the mounting member 4 with a prescribed gap from the second surface 4ab. As shown in FIG. 2 , the flat plate portion 6 b is electrically connected to the ground wire 8 .

Since the flat plate portion 6b of the grounded metal holder 6 is arranged to face the second surface 4ab of the mounting member 4 with a prescribed gap and is electrically connected to the ground wire 8, the light source unit 10 of the present embodiment has higher electrical reliability.

Hereinafter, the configuration of the light source unit 10 according to the present embodiment will be described in detail. As shown in FIGS. 1 to 3 , the light source unit 10 of the present embodiment is housed in the recess 31 aa of the fixture body 31 , thereby constituting a part of the lighting fixture 30 . As shown in FIG. 1 , light source unit 10 includes cover member 5 , hook spring 7 a , and hook piece 7 b in addition to light source 1 , power supply device 3 , mounting member 4 and ground metal holder 6 .

The light source 1 includes a light emitting element 1a, and a mounting substrate 1b on which the light emitting element 1a is mounted. Each of the light emitting elements 1a is an LED (Light Emitting Diode). The light emitting element 1 is electrically connected to a conductive pattern provided on the mounting substrate 1b with solder.

For example, each LED has an LED chip, a package provided with a hollow portion in which the LED chip is placed, and a translucent packaging member that encapsulates the hollow portion. For example, the LED chip is a blue LED chip configured to emit blue light. The encapsulation member is formed of a light-transmitting material. Examples of light-transmitting materials used for encapsulating members include silicone and epoxy. The light-transmitting material used for the encapsulation member is mixed with phosphor. For example, phosphorus is yellow phosphorus, which is excited by blue light from a blue LED chip to emit yellow light. Each LED is configured to emit a mixed color light that is a mix of blue light from the blue LED chip and yellow light from the yellow phosphor. For example, each LED is configured to emit neutral white light as mixed color light. Each light-transmitting material of the packaging member of the LED may not be mixed with phosphor. For example, each LED may be a surface mount LED comprising an LED chip, a package and packaging member, or a single LED chip. The light source 1 is not limited to such a configuration employing an LED as the light emitting element 1a. For example, each light emitting element 1a may be an organic electroluminescent device.

As shown in FIG. 3, the mounting substrate 1b has an outline (outer shape) shaped like an elongated rectangular flat plate. The mounting substrate 1b has a conductive pattern electrically connected to the light emitting element 1a. The conductive patterns electrically connect the light emitting elements 1a in series. The light emitting elements 1a are arranged in a straight line passing through the center in the transverse direction of the mounting substrate 1b along the longitudinal direction of the mounting substrate 1b. Each of the light emitting elements 1a is electrically connected to the conductive pattern with solder. For example, the mounting substrate 1b is a glass epoxy substrate. The mounting substrate 1b is not limited to a glass epoxy substrate, but examples thereof may further include a ceramic substrate and a metal-based printed wiring board. The connector 1c is mounted on an end portion in the longitudinal direction of the mounting substrate 1b. The connector 1c is electrically connected to the conductive pattern to allow power to be supplied to the light emitting element 1a. A cable connected to the connector 1 c of the mounting substrate 1 b is electrically connected to the power supply device 3 . It should be noted that, in the embodiment of FIG. 3, the mounting substrate 1b includes a first half substrate and a second half substrate electrically connected to each other, and the connector 1c is arranged on the first and second half substrates (ie, the mounting substrate 1b) the end of.

As shown in FIGS. 1 and 2 , the power supply device 3 is attached to the second surface 4ab of the mounting member 4 on the opposite side to the first surface 4aa on which the mounting substrate 1b is attached. The power supply device 3 is configured to supply prescribed lighting power to the mounting substrate 1b to turn on the light emitting element 1a. As shown in FIG. 3 , the power supply device 3 includes a power supply substrate 3 a, electrical components 3 b, and a case 3 c. The power substrate 3a is a glass epoxy resin substrate. The power supply substrate 3a is not limited to a glass epoxy substrate, but examples thereof may further include a ceramic substrate and a metal-based printed wiring board. Various types of electrical components 3b are mounted on the power supply substrate 3a.

Various types of electrical components 3 b constitute different circuits in the power supply device 3 . Examples of various types of electrical components 3b include transformers, diodes, capacitors, switching devices, and driver ICs (Integrated Circuits) for controlling switches of the switching devices. Various types of electrical elements 3b are appropriately electrically connected to constitute a power supply circuit for generating lighting power of the light emitting element 1a. For example, the power circuit includes a step-up chopper circuit and a step-down chopper circuit.

The case 3c accommodates a power supply substrate 3a and various types of electrical components 3b. The case 3c has a profile shaped like an elongated rectangular case, and the profile has openings formed in its surface. The housing 3c is arranged such that the mounting member 4 closes said opening. The housing 3c is attached to the mounting member 4, for example by means of mounting screws. The housing 3c includes a metal plate. The housing 3c is formed by punching and bending a metal plate.

As shown in Figures 2 and 3, the mounting member 4 has an elongated profile. As shown in FIG. 1 , the mounting member 4 is shaped like a C composed of a mounting portion 4 a and two side plate portions 4 b when viewed from a cross section perpendicular to the longitudinal direction of the mounting member 4 . The mounting portion 4a is formed in an elongated rectangular shape when viewed from the front (in the embodiment of FIG. 1 , the lower surface) of the mounting portion 4a. The side plate portion 4b is provided along the longitudinal direction of the mounting portion 4a so as to extend from both ends of the mounting portion 4a in the widthwise direction along the thickness direction of the mounting portion 4a. The side plate portions 4b are respectively provided with protrusions 4e protruding outward from their respective top ends. The protrusions 4 e are arranged along the longitudinal direction of the mounting member 4 .

Each protruding portion 4e is formed into a tubular shape by the coiled (rolled up) end of the corresponding side plate portion 4b. The mounting portion 4a is provided with a hollow portion 4ad passing through the center of the mounting portion 4a in the transverse direction along the longitudinal direction of the mounting portion 4a. The hollow portion 4ad includes a bottom portion 4cb and two side portions 4cc. The bottom 4cb is formed in an elongated rectangular shape when viewed from the front (in the embodiment of FIG. 1 , the lower surface) of the bottom 4cb. The side portions 4cc are bent downward from both ends in the widthwise direction of the bottom portion 4cb along the longitudinal direction of the bottom portion 4cb. The sides 4cc have a greater distance as they are further from the bottom 4cb. As shown in FIG. 1, the mounting member 4 is provided with a groove 4ae at a corresponding region between the bottom 4cb and each side plate portion 4b on the side of the second surface 4ab.

The mounting substrate 1 b is arranged at an appropriate position on the bottom 4 cb on the side of the first surface 4 aa of the mounting member 4 . The mounting substrate 1 b is attached to the bottom 4 cb of the mounting member 4 . The surface of the side portion 4cc constitutes a reflector that reflects light from the light emitting element 1a. As shown in FIG. 3, the mounting member 4 has an engaging piece 4s protruding from a bottom portion 4cb. The engaging piece 4s is inserted into the hole 1bc piercing the mounting substrate 1b in the thickness direction of the mounting substrate 1b. The engaging piece 4s is formed by bending, whereby the mounting member 4 fixes the mounting substrate 1b between the engaging piece 4s and the bottom portion 4cb.

The mounting member 4 is made of steel plate, for example. The material of the mounting member 4 is not limited to steel plates, and examples of metal materials may further include aluminum, copper, and stainless steel. With the light source unit 10, the mounting substrate 1b is arranged in contact with the mounting member 4 made of a metal material, whereby the mounting member 4 can be used as a heat sink. In the case where the mounting member 4 is made of a steel plate having a higher thermal conductivity than resin, the mounting member 4 can effectively dissipate the heat from the light emitting element 1a outward. The mounting member 4 is formed by punching and bending a steel plate.

The cover member 5 has an elongated profile. As shown in FIGS. 1 to 4 , the cover member 5 has a cover body 5 a and a cover end 5 b. As shown in FIG. 1 , the cover member 5 covers the mounting substrate 1 b on which the light emitting element 1 a is mounted, whereby a space 10 aa is formed between the mounting member 4 and the cover member 5 .

The cover body 5a has a light emitting portion 5c and a protruding plate 5d. The light emitting portion 5c has a semi-cylindrical profile. The light emitting portion 5c may be formed with a smooth curved surface, or a concave-convex surface. The concave-convex surface of the light emitting portion 5c can be used to converge or diverge the light from the light emitting element 1a. In other words, the light emitting portion 5c may function as a lens.

Protruding plates 5 d are provided on both ends of the light exit portion 5 c in the lateral direction so as to be along the longitudinal direction of the light exit portion 5 c. Two protruding plates 5d protrude in parallel from both ends of the light emitting portion 5c. The two protruding plates 5d are respectively provided with inwardly protruding protrusions 5e.

The protrusions 5 e are hooked on corresponding protrusions 4 e of the mounting member 4 . As shown in FIG. 1 , the two protruding plates 5 d each include an inner protrusion 5 f located between the protrusion 5 e and the light emitting portion 5 c. The two inner protrusions 5f are arranged such that their own top ends are close to each other. The extension portions 5h are provided on both ends of the light exit portion 5c in the lateral direction so as to be along the longitudinal direction of the light exit portion 5c. The extension portion 5h protrudes outside the corresponding protruding plate 5d such that the extension portion 5h and the light emitting portion 5c are connected to each other. In the cover body 5a, a light emitting portion 5c, a protruding plate 5d, a protrusion 5e, an extension 5h, and an inner protrusion 5f are integrally formed.

Cap ends 5b are provided on both ends of the cap body 5a in the longitudinal direction. Each cap end 5b has a profile shaped like a semi-disc. Each cap end 5b includes two clamping portions 5g. Each of the two clamping portions 5g can clamp the corresponding inner protrusion 5f of the cover body 5a. Each clamping portion 5g clamps the corresponding inner protrusion 5f, whereby the cap end 5b is attached to the cap body 5a.

Preferably, the cover member 5 is configured to allow the light from the light emitting element 1a to pass efficiently. The material of the cover member 5 may be a translucent resin such as polycarbonate resin or acrylic resin. For example, the cover member 5 may be formed by extrusion. A light diffusing agent may be contained in the translucent resin of the cover member 5 .

The grounded metal holder 6 has a first reinforcement wall 6d and a second reinforcement wall 6f in addition to the fixing portion 6a and the flat plate portion 6b. As shown in FIGS. 1 to 3 , the ground metal holder 6 has a box-shaped profile formed by a fixing portion 6 a, a flat plate portion 6 b, a first reinforcing wall 6 d, and a second reinforcing wall 6 f. As shown in FIGS. 2 and 3 , the flat plate portion 6 b has an outline shaped like an elongated rectangular flat plate. In FIG. 2 , a double-headed arrow X indicates the longitudinal direction of the flat plate portion 6b, and a double-headed arrow Y shows the horizontal direction of the flat plate portion 6b.

The fixed portion 6a has a first fixed portion 6aa and a second fixed portion 6ab. As shown in FIGS. 1 and 2 , the first fixing portion 6aa has a first side wall 6c, a first base piece 6g, and a protruding piece 6j. The first side wall 6c has an outline shaped like an elongated rectangular flat plate. The first base sheet 6g is arranged at one end of the first side wall 6c in the transverse direction so as to be along the longitudinal direction of the first side wall 6c. The first base sheet 6g has an outline shaped like a rectangular flat plate. The first base sheet 6g protrudes outward in a direction perpendicular to the first side wall 6c. The protruding piece 6j is arranged on the other end of the first base sheet 6g in the transverse direction opposite to the first side wall 6c so as to be along the longitudinal direction of the first base sheet 6g.

The protruding piece 6j has an outline shaped like a rectangular flat plate. The protruding piece 6j protrudes from the first base sheet 6g in the thickness direction of the first base sheet 6g. The protruding piece 6j is arranged to face the first side wall 6c. In other words, the first fixing portion 6aa has a C-shaped profile formed of the first side wall 6c, the first base piece 6g, and the protruding piece 6j when viewed from a cross section perpendicular to the double-headed arrow Y.

The second fixing portion 6ab has a second side wall 6e and a second base sheet 6h. The second side wall 6e has an outline shaped like an elongated rectangular flat plate. The second base sheet 6h is provided on the end portion of the second side wall 6e on the side opposite to the flat plate portion 6b so as to be along the longitudinal direction of the flat plate portion 6b. The second base sheet 6h has an outline shaped as a rectangular flat plate. The second base sheet 6h protrudes outward in a direction perpendicular to the second side wall 6e. The second fixing portion 6ab has an L-shaped profile formed by the second side wall 6e and the second base sheet 6h when viewed from a cross section perpendicular to the double-headed arrow X. The first side wall 6c of the first fixing portion 6aa and the second side wall 6e of the second fixing portion 6ab are arranged to be perpendicular to each other.

The insertion hole 6ba is provided at the center in the transverse direction of the flat plate portion 6b on one side of the longitudinal first edge of the flat plate portion 6b. The insertion hole 6ba pierces the flat plate portion 6b in the thickness direction of the flat plate portion 6b. The first side wall 6c of the first fixing portion 6aa is arranged on the first edge in the longitudinal direction of the flat plate portion 6b so as to be along the transverse direction of the flat plate portion 6b. The first side wall 6c protrudes along the thickness direction of the flat plate portion 6b. The second side wall 6e of the second fixing portion 6ab is arranged on the first edge in the transverse direction of the flat plate portion 6b so as to be along the longitudinal direction of the flat plate portion 6b. The second side wall 6e is arranged on the side of the second edge opposite to the first edge in the longitudinal direction of the flat plate portion 6b. The second side wall 6e protrudes along the thickness direction of the flat plate portion 6b.

The first reinforcing wall 6d is arranged on the second edge of the flat plate portion 6b in the longitudinal direction so as to be in the transverse direction of the flat plate portion 6b. The first reinforcing wall 6d has an outline shaped like an elongated rectangular flat plate. The first reinforcement wall 6d protrudes from the flat plate portion 6b along the thickness direction of the flat plate portion 6b. The first reinforcement wall 6d is arranged to face the first side wall 6c. The dimension of the first reinforcement wall 6d in the longitudinal direction is smaller than the dimension of the first side wall 6c in the longitudinal direction. The size of the first reinforcement wall 6d in the lateral direction is substantially equal to the size of the first side wall 6c in the lateral direction. The first reinforcement wall 6 d can enhance the mechanical strength of the grounded metal holder 6 .

The second reinforcing wall 6f is arranged on a second edge of the flat plate portion 6b opposite to the first edge in the lateral direction, where the second side wall 6e is arranged on the first edge. The second reinforcement wall 6f has an outline shaped like an elongated rectangular flat plate. The dimension of the second reinforcing wall 6f in the longitudinal direction of the flat plate portion 6b is larger than the dimension of the second side wall 6e in the longitudinal direction of the flat plate portion 6b. The dimension of the second reinforcing wall 2f in the transverse direction is smaller than the corresponding dimension of the first and second side walls 6c, 6e in the transverse direction. The second reinforcement wall 6f protrudes from the flat plate portion 6b along the thickness direction of the flat plate portion 6b. The second reinforcement wall 6f is arranged to face the second side wall 6e. The second reinforcement wall 6f can enhance the mechanical strength of the grounded metal holder 6 .

In the ground metal holder 6, the fixing portion 6a and the flat plate portion 6b are integrally formed of a metal piece. The ground metal holder 6 is formed by punching and bending a metal piece. For example, the metal part of the grounded metal cage 6 is a steel plate. The metal member of the ground metal holder 6 is not limited to steel plates, and examples of metal materials may further include aluminum, copper, and stainless steel.

The first base piece 6g of the ground metal holder 6 is placed in one of the grooves 4ae of the mounting member 4 in the lateral direction (the first groove 4ae) so as to be along the longitudinal direction of the mounting member 4 . As shown in FIGS. 1 and 2, the first base sheet 6g is slightly smaller than the groove 4ae to fit into the groove 4ae, thereby determining its position. The first base piece 6g is fastened to the mounting portion 4a in such a manner that the first base piece 6g is put into the groove 4ae, whereby the ground metal holder 6 is fixed. That is, the first base sheet 6g is fastened to the mounting portion 4a. In short, the first base sheet 6g is a fastening sheet. The first base sheet 6g is fixed to the mounting portion 4a so as to be electrically connected thereto.

The protruding pieces 6j are arranged along the corresponding side plate portions 4b, and the first base piece 6g is inserted into the groove 4ae of the mounting member 4. As shown in FIG. The protruding piece 6j may be fixed to the side plate portion 4b with screw(s). The protruding piece 6j is attached to the side plate portion 4b, and the first base piece 6g is inserted into the groove 4ae of the mounting member 4. As shown in FIG. The protruding piece 6j is connected to the side plate portion 4b of the mounting member 4 so that the light source unit 10 can further enhance the mechanical fixing strength of the mounting member 4 and the ground metal holder 6 . In the light source unit 10 , the mounting member 4 can be electrically connected to the ground metal holder 6 by connecting the protruding piece 6 j to the side plate portion 4 b of the mounting member 4 . The protruding piece 6j does not necessarily have to be joined to the side plate portion 4b.

In other words, the mounting member 4 in the light source unit 10 of the present embodiment has a mounting portion 4a shaped like a flat plate and has a first surface 4aa and a second surface 4ab, and extends from the second surface 4ab along the thickness direction of the mounting portion 4a. The side plate portion 4b. Preferably, the fixing portion 6a has a protruding piece 6j joined to the side plate portion 4b.

In the present embodiment, since the fixing portion 6a has the protruding piece 6j connected to the side plate portion 4b, the light source unit 10 can further strengthen the electrical and mechanical connection.

The second base piece 6 h of the ground metal holder 6 is placed in the other groove (second groove 4ae ) in the lateral direction among the grooves 4ae of the mounting member 4 so as to be along the longitudinal direction of the mounting member 4 . The second base piece 6h is slightly smaller than the second groove 4ae to fit into the second groove 4ae, thereby determining its position. The second base piece 6h is fastened to the mounting portion 4a in such a manner that the second base piece 6h is put into the second groove 4ae, whereby the ground metal holder 6 is fixed. That is, the second base sheet 6h is fastened to the mounting member 4 . In short, the second base sheet 6h is a (second) fastening sheet. The second base sheet 6h is fixed to the mounting portion 4a to be electrically connected thereto.

As for the ground metal holder 6 , the ground metal holder 6 is mechanically and electrically connected to the installation member 4 because the fixing portion 6 a is fastened and fixed to the installation member 4 .

In other words, in the present embodiment, the fixing portion 6 a of the light source unit 10 preferably has a fastener fastened to the mounting member 4 .

In the present embodiment, since the fixing portion 6a has a fastener fastened to the mounting member 4, the light source unit 10 can improve the mechanical fixing strength of the mounting member 4 and the ground metal holder 6 and electrically and electrically fix the mounting member 4 and the ground metal holder 6 with a relatively simple configuration. connect.

The ground metal holder 6 and the mounting member 4 are not limited to the configuration in which they are fastened so as to be electrically connected to each other. The mechanical and electrical connection between the grounded metal cage 6 and the mounting member 4 may be made using screw(s).

As shown in FIGS. 1 and 2 , the screw 9 is fixed into the insertion hole 6ba of the grounded metal holder 6 through a spring washer. For example, self-tapping screws can be used as the screw 9 . The screws 9 are not limited to self-tapping screws, but can be bolts and nuts. The ground metal holder 6 has a gap between the flat plate portion 6b and the second surface 4ab of the mounting member 4, which is properly set so that the screw 9 does not contact the mounting member 4 even when fixed in the insertion hole 6ba. For the ground metal holder 6, screws 9 are fixed in the insertion holes 6ba, thereby fixing the ground wire 8 to the flat plate portion 6b. The ground wire 8 is provided with a crimp terminal 8a whose tip is shaped like a ring. For example, the ground wire 8 is a flexible cable. By fixing the crimp terminal 8 a of the ground wire 8 to the flat plate portion 6 b with the screw 9 , the mounting member 4 is electrically connected to the ground wire 8 through the ground metal holder 6 . The ground metal holder 6 is not limited to a configuration in which the crimp terminal 8 a of the ground wire 8 is fixed to the flat plate portion 6 b with screws and the ground metal holder 6 is electrically connected to the ground wire 8 . In the case where the top end of the ground wire 8 is a metal piece shaped like a flat plate, the ground metal holder 6 may have a holder configured to clamp and hold the metal piece.

As shown in FIG. 1 , a hook spring 7 a is attached to the second surface 4 ab of the mounting member 4 . The hook springs 7 a are provided on both ends in the longitudinal direction of the mounting member 4 and on one side (in this embodiment, the second side) in the lateral direction of the mounting member 4 . The hook springs 7 a are hooked on respective corresponding hook metal parts of the appliance body 31 .

As shown in FIG. 1 , a hooking piece 7 b is attached to the second surface 4 ab of the mounting member 4 . As shown in FIG. 3 , the hooking pieces 7 b are provided on both ends in the longitudinal direction of the mounting member 4 and on the other side (in this embodiment, the first side) in the lateral direction of the mounting member 4 . The hooking pieces 7b are inserted into respective corresponding hooking holes 31k of the appliance body 31 and hooked on the outer peripheries of the hooking holes 31k.

Hereinafter, the circuit of the light source unit 10 will be described with reference to FIG. 5 . In FIG. 5 , the mounting member 4 to which the light source 1 and the power supply device 3 are attached is indicated by a chain line. FIG. 5 shows the grounded mounting member 4 .

The power supply device 3 includes an input connector 3d, a filter circuit 3e, a rectifier 3f, a boost circuit 3g, a step-down circuit 3h, and an output connector 3i. The power supply device 3 also includes a main control circuit 3j, a control power supply circuit 3k, a light output control circuit 3m, a light-off control circuit 3n, and a signal receiver 3p.

The input connector 3d is configured to be electrically connected to an external power source 40, such as an AC power source. The filter circuit 3e has a common mode choke coil 3e1 and a cross-line capacitor 3e2. The rectifier 3f is, for example, a diode bridge circuit. The AC input terminal of the rectifier 3f is electrically connected to an external power source 40 through a filter circuit 3e and an input connector 3d. The rectifier 3f is configured to full-wave rectify the AC voltage and AC current from the external power source 40 to output pulse output from its own DC output terminal.

The booster circuit 3g has a choke coil L1, a first switching device Q1, a first rectifying device D1, and a first smoothing capacitor C1. In the boosting circuit 3g, the choke coil L1, the first switching device Q1, the first rectifying device D1, and the first smoothing capacitor C1 constitute a boosting chopper circuit. The boost chopper circuit acts as a power correction circuit. The step-up circuit 3g is configured to step up the pulsating voltage from the rectifier 3f to output a DC voltage (output voltage).

The step-down circuit 3h has a second switching device Q2, an inductor L2, a second rectifying device D2, a first resistor R1, and a second smoothing capacitor C2. In the step-down circuit 3h, the second switching device Q2, the inductor L2, the second rectifying device D2, the first resistor R1, and the second smoothing capacitor C2 constitute a step-down chopper circuit. The step-down chopper circuit is a Buck converter. The step-down circuit 3h is configured to step down the DC voltage from the boost circuit 3g to output a DC current (output current). The output connector 3i is electrically connected to the output terminal of the step-down circuit 3h. For example, the output connector 3i is a jack connector.

The main control circuit 3j is configured to control the switching of the first switching device Q1, thereby regulating the output voltage of the boost circuit 3g to a constant voltage. The main control circuit 3j is also configured to control the switching of the second switching device Q2, thereby regulating the output current of the step-down circuit 3h to a prescribed target value. The control power supply circuit 3k is configured to generate operating power for the main control circuit 3j from the output voltage from the booster circuit 3g.

In the power supply device 3, the light output control circuit 3m and the light-off control circuit 3n are configured to be supplied with a control signal from the signal receiver 3p. The light-off control circuit 3n is configured to generate a light-off signal for turning off the light source 1 according to the control signal, thereby providing the light-off signal to the main control circuit 3j. The main control circuit 3j is configured to stop the switching of the second switching device Q2 to deactivate the step-down circuit 3h when receiving the light-off signal, thereby turning off the light source 1 .

The light output control circuit 3m is configured to generate a light output control signal indicating the light output level of the light source 1 according to the control signal, thereby supplying the light output control signal to the main control circuit 3j. The main control circuit 3j is configured to adjust the On duty ratio of the second switching device Q2 according to the light output control signal from the light output control circuit 3m. The light output control circuit 3m is configured to detect (measure) the output current from the step-down circuit 3h of the voltage across the first resistor R1 and generate a light output control signal such that the average value of the output current corresponds to a target of the light output level The values are consistent.

Hereinafter, higher electrical reliability obtained from the configuration of the light source unit 10 of the present embodiment will be explained based on the light source unit 10 of the present embodiment and the light source unit of a comparative example. The light source unit of the comparative example has a similar configuration to the light source unit 10 of the present embodiment except that it is not provided with a grounded metal holder. In the light source unit of the comparative example, it is considered that the power supply unit attached to the mounting member is electrically grounded through the wire outside the power supply unit in order to avoid malfunction. In the case where the power supply unit attached to the mounting member is electrically grounded through an electric wire outside the power supply unit, the light source unit of the comparative example needs to satisfy the standards of Act on Product Safety of Electrical Appliances and Materials for Grounding Protection of Lighting Appliances. on Product Safety of Electrical Appliances and Materials).

In addition, for lighting fixtures, the standard law of product safety of electrical appliances and materials may be different from JIS (Japanese Industrial Standards) or IEC standards (International Electrotechnical Commission). For example, for the light source unit of the comparative example, only the power supply unit attached to the mounting member is electrically grounded through a wire outside the power supply unit may not satisfy the standards of IEC60598-1 7.2.11 and IEC61347-1 9 regarding grounding protection of lighting fixtures.

For the light source unit of the comparative example, it is considered that in order to satisfy the standards of IEC60598-1 7.2.11 and IEC61347-1 9 regarding ground protection of lighting fixtures, the ground wire is directly fixed to the mounting member by means of screws.

However, in the case where the ground wire is directly fixed to the mounting member by means of screws, there is a concern that fragments of the mounting member may pierce the side of the mounting substrate on which the light emitting element is mounted. With the light source unit of the comparative example, the fragments of the mounting member piercing the side of the mounting substrate on which the light emitting element is mounted lowers the electrical reliability because the slices adhere to the conductive pattern of the mounting substrate. In addition, with the light source unit of the comparative example, in the case where the ground wire is directly fixed to the mounting member with a screw, the screw may protrude from the surface of the mounting substrate on which the light emitting element is mounted. In the light source unit of the comparative example, in the case where the ground wire is directly fixed to the mounting member by means of a screw, if the screw protrudes from the surface of the mounting substrate on which the light emitting element is mounted, the optical performance is degraded because the light from the light emitting element There are shadows of screws in the light.

In the light source unit 10 of this embodiment, since the ground wire 8 is electrically connected to the mounting member 4 through the ground metal holder 6 , the mounting member 4 is grounded separately from the power supply device 3 . Since the mounting member 4 is grounded separately from the power supply device 3, the light source unit 10 of the present embodiment can satisfy JIS and IEC standards on grounding protection of lighting fixtures.

In the light source unit 10 of this embodiment, since the flat plate portion 6b of the ground metal holder 6 faces the second surface 4ab of the mounting member 4 with a prescribed gap, the ground wire 8 can be electrically connected relatively easily. Since there is a prescribed gap between the flat plate portion 6b and the second surface 4ab, the light source unit 10 of this embodiment can suppress the influence of debris by the screw 9, thereby having high electrical reliability even when the ground wire 8 is connected.

In this embodiment, the flat plate portion 6b of the ground metal holder 6 has a prescribed gap when the flat plate portion 6b faces the second surface 4ab of the mounting member 4, and is electrically connected to the ground wire 8 together with the appliance body 31. Thus, the light source unit 10 can prevent the screws 9 from protruding from the surface side of the mounting substrate 1b. The light source unit 10 can prevent the screw 9 from protruding from the surface side of the mounting substrate 1b, so that a decrease in optical performance can be suppressed and the degree of freedom in design can be improved.

Assembly of the light source unit 10 will be described below.

In the assembly process of the light source unit 10, the light emitting element 1a is mounted on the mounting substrate 1b, and the light source 1 is prepared in advance. In the assembly process, the grounded metal holder 6 is attached to the second surface 4ab of the mounting member 4 in advance. The ground metal holder 6 is fastened to the mounting member 4 in advance. The first base piece 6g of the ground metal holder 6 is placed into one of the two grooves 4ae of the mounting member 4 . The second base sheet 6h is put into the other of the two grooves 4ae of the mounting member 4 . The ground metal is held by plastically deforming the first base sheet 6g and the bottom portion 4cb in the thickness direction and in the direction perpendicular to the thickness direction by utilizing plasticity of the metal produced by punching the stacked first base sheet 6g and the bottom portion 4cb from the thickness direction. A shelf 6 is joined to the bottom 4cb of the mounting member 4 .

The ground metal holder 6 is attached to the bottom 4cb of the mounting member 4 such that a punch from the first surface 4aa side of the bottom 4cb protrudes from the second surface 4ab while the first base sheet 6g is superimposed on the bottom 4cb. In the ground metal holder 6 , the second base piece 6 h is further connected to the mounting portion 4 a of the mounting member 4 similarly to the connection of the first base piece 6 g to the mounting member 4 . The ground metal holder 6 is electrically and mechanically connected to the mounting member 4 by connecting the first base piece 6g to the bottom 4cb and the second base piece 6h to the bottom 4cb.

During assembly, the mounting substrate 1b is placed on the first surface 4aa of the mounting member 4, followed by bending the engaging piece 4s of the mounting member 4 inserted into the hole 1bc of the mounting substrate 1b. Accordingly, the light source 1 is attached to the mounting portion 4 a of the mounting member 4 . During assembly, the power supply device 3 is attached to the second surface 4ab of the mounting member 4 . During assembly, the power supply device 3 is fastened to the mounting member 4 .

During assembly, the cover member 5 is then attached to the mounting member 4 to cover the mounting substrate 1b. During assembly, the protrusion 5e of the cover member 5 engages with the protrusion 4e of the mounting member 4 . The two protrusions 5 e are respectively hooked to the corresponding protrusions 4 e , whereby the cover member 5 is attached to the fitting 4 . During assembly, the protrusion 5e of the cover member 5 engages with the protrusion 4e of the mounting member 4 . During assembly, the cover member 5 is integrally fixed to the mounting member 4 by appropriately screwing the protruding plate 5 d of the cover member 5 onto the side plate portion 4 b of the mounting member 4 . During assembly, the cover ends 5 b are attached to both ends in the longitudinal direction of the combined body of the cover member 5 and the mounting member 4 . Thus, the light source unit 10 can be assembled.

Hereinafter, the fixture body 31 of the lighting fixture 30 will be briefly described with reference to FIGS. 1 , 3 and 4 . For example, the lighting fixture 30 is directly attached to the ceiling. The appliance body 31 is attached to the ceiling with bolts.

The appliance body 31 has an elongated profile. The tool body 31 is shaped like a flat box. The appliance body 31 is formed of a metal plate. The concave portion 31aa is provided at the center of the appliance body 31 . The concave portion 31aa has a contour formed by the rectangular concave surface of the appliance body 31 . The concave portion 31aa is provided along the entire length in the longitudinal direction of the appliance body 31 .

The appliance body 31 has inclined portions 31b on both sides of the recessed portion 31aa, which extend from the opening edge of the recessed portion 31aa. The inclined portion 31b is so inclined that the thickness of the appliance body 31 gradually becomes smaller in a direction away from the concave portion 31aa. The appliance body 31 includes an end cap 31e. End caps 31 e are provided at both ends in the longitudinal direction of the appliance body 31 . Each end cap 31e is shaped in a trapezoidal shape when viewed from the front thereof.

As shown in FIG. 3 , hooking holes 31k into which the hooking pieces 7b of the light source unit 10 are inserted are provided at both ends in the longitudinal direction of the concave portion 31aa. The light source unit 10 is attached to the appliance body 31 in such a manner that a part of the light source unit 10 is inserted into the concave portion 31aa. The power supply device 3 and the ground metal holder 6 are accommodated in the recessed portion 31aa. In the lighting fixture 30 , the protruding plate 5 d of the cover member 5 is placed between the side plate portion 4 b of the light source unit 10 and the concave portion 31 aa of the fixture body 31 while the light source unit 10 is attached to the fixture body 31 . The extension portion 5 h is provided so as to overlap the opening edge of the concave portion 31 aa of the appliance body 31 while the light source unit 10 is attached to the appliance body 31 .

In other words, the lighting fixture 30 includes the light source unit 10 and the fixture body 31 . The fixture body 31 holds the light source unit 10 .

An insertion hole 31ca is provided in the bottom portion 31a of the appliance body 31 . The insertion hole 31ca is provided in the bottom 31a along the longitudinal direction of the appliance body 31 . A power supply wire (live wire and neutral wire) for power supply is inserted into any one of the insertion holes 31ca. The power line is electrically connected to the external power source 40 . The control wire(s) is inserted into any one of the insertion holes 31ca. Light output control signals for controlling the illumination of the light source unit 10 are transmitted in the control line(s). A ground conductor is inserted into any one of the insertion holes 31ca. The ground conductor is grounded on the outside of the lighting fixture 30 . For example, each of the power line, the control line(s), and the ground conductor is an electric wire whose core wire is covered with an insulating coating.

Insertion holes 31cb are provided at the bottom 31a, and each of the hanger bolts is to be inserted into any one of the insertion holes 31cb. Four insertion holes 31cb are provided along the longitudinal direction of the appliance body 31 . Bolts provided behind the ceiling are to be inserted into any one of the insertion holes 31cb. The hanger bolts inserted into the respective insertion holes 31cb are fastened with corresponding nuts. Metal hooks are attached to both ends in the longitudinal direction of the bottom 31 a and to one of both ends in the transverse direction of the bottom 31 a. The hook spring 7 a of the light source unit 10 is hooked on a corresponding metal hook piece of the appliance body 31 .

A junction box 36 is attached to the bottom 31a. The junction box 36 allows an external power source 40 to supply power to the power supply device 3 through a connection line. The junction box 36 is respectively connected with the power line, the control line(s) and the ground conductor. The junction box 36 has a case 36a, a junction screw 36b, and a junction plate 36c. As shown in FIGS. 1 and 3 , the housing 36a has a square tube 36e, a connecting portion 36f, and a cylindrical portion 36g. The housing 36a has three square tubes 36e. The three square tubes 36e are linked by the joint portion 36f so as to be laterally arranged side by side while their respective longitudinal directions are arranged in a row. Two cylindrical portions 36g are arranged at both ends in the longitudinal direction of each square tube 36e. The axial direction of each cylindrical portion 36g is perpendicular to the longitudinal direction of the corresponding square tube 36e. The inside of each cylindrical portion 36g communicates with the inside of the corresponding square tube 36e.

Each terminal screw 36b is allowed to move inside the corresponding cylindrical portion 36g along the axial direction of the corresponding cylindrical portion 36g. Each terminal plate 36c is arranged inside the corresponding square tube 36e to face the corresponding terminal screw 36b. Each terminal screw 36b is screwed into the corresponding cylindrical portion 36g. Each terminal plate 36c is shaped like an elongated rectangular plate along the inside of the corresponding square tube 36e.

In the terminal box 36, each pair of terminal screws 36b and the terminal plate 36c are allowed to sandwich the cores of the electric wires therebetween when the cores of the electric wires are inserted into the corresponding square tubes 36e. The ground conductor outside the lighting fixture 30 is inserted into, for example, the first opening of the square tube 36e in the junction box 36 to be fixed with the junction screw 36b on the side of the first opening. For example, the ground wire 8 from the ground metal holder 6 is inserted into, for example, the second opening of the square tube 36e in the junction box 36 on the opposite side to the first opening to be fixed with another terminal screw 36b on the side of the second opening. Thus, the terminal box 36 enables the ground wire 8 to be electrically connected to the ground conductor through one of the terminal plates 36c.

Installation of the lighting fixture 30 of the present embodiment will be briefly described below.

During installation, the power line, control line(s) and ground conductors exposed to the room through the ceiling are inserted into all or a part of the appliance body 3 into the insertion hole 31ca. During installation, hanger bolts exposed into the room through the ceiling are inserted into all or a part of the insertion holes 31cb. For example, the hanger bolts are screwed into the corresponding nuts while the hanger bolts are inserted into the corresponding washers, thereby fixing the appliance body 31 on the ceiling. During installation, the power wires, the control wire(s) and the ground conductor are respectively connected to the junction box 36 . It should be noted that in the case of the terminal box 36 having three terminal screws 36b, three terminal blocks 36c and three square tubes 36e, the control wire(s) will be electrically connected to the power supply unit 3 instead of Through junction box 36.

Next, the previously assembled light source unit 10 is put into the concave portion 31aa of the fixture body 31 . During installation, the hooking pieces 7 b of the light source unit 10 are hooked to the corresponding hooking holes 31 k of the fixture body 31 , and the light source unit 10 is temporarily held by the fixture body 31 . During installation, the power supply device 3 is then electrically connected to the junction box 36 through the connection wire while the light source unit 10 is temporarily held by the appliance body 31 . During installation, the ground metal holder 6 is electrically connected to the junction box 36 through the ground wire 8 while the light source unit 10 is temporarily held by the fixture body 31 . The first end of the core wire of the ground wire 8 is fixed to the junction box 36 with a terminal screw 36b, and the second end of the core wire of the ground wire 8 on the opposite side to the first end is fixed to the ground metal holder 6 by means of a screw 9. The flat plate portion 6b around the insertion hole 6ba.

During installation, the light source unit 10 is rotated around the hook hole 31 k of the appliance body 31 as a rotation center to be accommodated in the concave portion 31 aa of the appliance body 31 . Thus, the lighting fixture 30 of the present embodiment can be installed relatively easily.

The lighting fixture 30 is not limited to a surface-mounted type. As long as the lighting fixture can hold its corresponding light source unit 10, the lighting fixture 30 can be applied to other types of lighting fixture configurations.

While the foregoing has described what are considered to be the best examples and/or embodiments, it should be understood that various types of modifications could be made therein, and that the subject matter disclosed herein could be embodied in various forms and examples, and that they could are used in many applications, and this article only describes some of them. The following claims are intended to claim any and all modifications and variations that fall within the true scope of the teachings herein.

List of reference signs

1 light source

3 Power supply unit

4 Mounting components

4a Installation part

4b side panel

4aa first surface

4ab second surface

6 Grounded metal cage

6a Fixed part

6b flat part

6j protruding piece

10 light source unit

30 lighting fixtures

31 appliance body

Claims (4)

1. A light source unit, comprising: light source; a mounting member, the light source is attached to a first surface of the mounting member, the mounting member is made of a metal material; a power supply device attached to a second surface of the mounting member on the opposite side of the first surface and configured to provide power to the light source; and a grounded metal cage attached to the second surface and electrically connected to the mounting member, wherein, the ground metal holder has a fixed portion fixed to the mounting member and a flat plate portion held by the fixed portion, The flat plate portion is arranged to face the second surface of the mounting member with a prescribed gap from the second surface and is electrically connected to a ground line. 2. The light source unit according to claim 1, wherein the fixing portion has a fastener fastened to the mounting member. 3. The light source unit according to claim 1 or 2, characterized in that, The mounting member has a mounting portion shaped like a flat plate and having the first surface and the second surface, and a side plate portion extending from the mounting portion in the thickness direction of the mounting portion. said second surface extends, and The fixing portion has a protruding piece joined to the side plate portion. 4. A lighting fixture, comprising: The light source unit according to any one of claims 1 to 3; and An appliance body that holds the light source unit.