JP2005019316A - Lighting device and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of electrically insulating a metal housing base for a case and a circuit board module from each other at a low cost by a simple structure and suitable for acquiring waterproofness. <P>SOLUTION: Using inputting/outputting electric wire connectors 31 and 32 attached to both longitudinal ends of a circuit board 22 equipped to the circuit board module 21, insulating spacers 35 are arranged in an electric insulation connector case 33 for these connectors. In these spacers 35, the module 21 is supported at its both ends and stored inside the metal storage base 12 of the case 11, while the soldering face 22a of the circuit board 22 is held apart from the base wall 12a of the storage base 12. In this way, the base wall 12a is formed into a holeless structure by omitting a cutout serving as a spacer at the base wall 12a while electrically insulating the storage base 12 and the circuit board 22 from each other without requiring any special spacer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture having a discharge lamp such as a fluorescent lamp, and a lighting device for lighting the discharge lamp of the fixture.
[0002]
2. Description of the Related Art A lighting device provided with a fluorescent lamp illuminator often uses a lighting device having an inverter type lighting circuit made by combining a large number of electrical components, so-called an electronic ballast.
[0003]
In this type of lighting device, a circuit board provided with a lighting circuit is accommodated in a case made of a metal bottom plate and a cover.
[0004]
In order to electrically insulate the electrical components mounted on the circuit board from the bottom plate, a plurality of supporting pieces each having a mounting recess and having a substantially L shape are cut and raised from the bottom surface of the bottom plate. There is known a lighting device in which a circuit board is placed on a base plate so that each support piece portion serves as a spacer to separate the circuit board from the bottom plate (see, for example, Patent Document 1).
[0005]
[Patent Document 1]
JP 10-154861 A (paragraphs 0018-0020, paragraphs 0024-0025, FIGS. 1-2, and 5)
[0006]
The metal bottom plate of the case provided in the lighting device of Patent Document 1 is made by press working, and a plurality of support pieces are cut and raised on the bottom surface thereof. Therefore, the structure of the mold used for press molding is complicated. For this reason, since the molding cost of the bottom plate increases with the high mold cost, it is disadvantageous for reducing the cost of the lighting device.
[0007]
Furthermore, since the supporting piece part integrated with the bottom plate is made of metal, the supporting piece part escapes from the circuit so that a necessary electrical insulation distance is secured between the supporting piece part and the circuit pattern of the circuit board. A pattern must be provided. For this reason, when the mounting density of electrical components on a circuit board is increased in order to reduce the size and performance of the lighting device, the mounting position of the electrical components may be restricted, which may limit the circuit pattern design. There is.
[0008]
Further, depending on the usage of the lighting fixture, the lighting device may need to be waterproof. In this case, it is considered that an electrically insulating synthetic resin is filled at least between the bottom plate and the circuit board, and the soldering surface of the circuit board is filled with the filling resin. However, since the conventional lighting device is provided with the plurality of support pieces cut and raised as described above, the bottom plate is formed with the cut and raised marks as holes. For this reason, it is difficult to fill the synthetic resin between the bottom plate and the circuit board as described above.
[0009]
The problem to be solved by the present invention is that it is possible to obtain electrical insulation between the metal housing base of the case and the circuit board module at a low cost with a simple configuration and suitable for obtaining waterproofness. It is providing a lighting device provided with this lighting device and this device.
[0010]
In order to solve the above-mentioned problems, the lighting device of the invention according to claim 1 has a metal housing base having a base wall and a cover attached to the housing base. A case, an electrically insulating circuit board, and various electrical components that are mounted between both ends of the board in the longitudinal direction to form a lighting circuit, and the lighting circuit includes terminals that pass through the circuit board; A circuit board module including an electrical component soldered and mounted on a soldering surface of a circuit board, the soldering surface being separated from the base wall and built in the case, and the base wall and the circuit board A connector case made of synthetic resin provided with an insulating spacer disposed between and electrically connected to the lighting circuit at both ends in the longitudinal direction of the circuit board. It is anda wire connector for input and output.
[0011]
The lighting device of the present invention uses an input / output electric wire connector attached to both ends in the longitudinal direction of the circuit board provided in the circuit board module, and provides an insulating spacer on the electrically insulating connector case of the connector, These spacers support the circuit board module at both ends and hold the soldering surface of the circuit board away from the base wall of the metal housing base of the case. Thereby, it is possible to electrically insulate between the housing base and the circuit board without requiring a special spacer component, and to make a structure in which the base wall does not need to be raised and raised to provide the spacer. Therefore, the structure of the mold for press-molding the storage base can be simplified, the cost can be reduced, and an electrically insulating synthetic resin is provided between the base wall of the storage base and the soldering surface of the circuit board. Is preferable because the filling resin does not leak from the base wall.
[0012]
In the present invention, the base wall of the housing base can have a holeless structure, but the holeless structure means that there is no hole formed by a cut and raised mark. Therefore, the structure of the base wall provided with fine holes to the extent that the filled resin does not leak in relation to the viscosity of the resin when the filled resin is filled into the containing base is the base of the structure without holes. It is included in the wall.
[0013]
In the lighting device of the invention according to claim 2, the wire connector is soldered by penetrating a terminal protruding from the connector case into the circuit board, and the insulating spacer can be pushed into the connector case. The pushing direction leading end side portion penetrates the connector case and protrudes from the soldering surface by the pushing, and the escape portions through which the insulating spacer passes are respectively at the longitudinal ends of the circuit board. It is characterized by being provided.
[0014]
In this invention, in the state before the insulating spacer of the electric wire connector is pushed in, the distal end portion in the pushing direction of the spacer is held in a state where it does not protrude from the connector case. When soldering, the insulating spacer is not melted or deformed by the heat of the molten solder. For this reason, the insulating spacer can be surely pushed and moved after soldering to exhibit a predetermined function.
[0015]
According to a third aspect of the present invention, there is provided a lighting fixture comprising: a fixture main body; a lamp socket attached to the fixture main body; a discharge lamp removably supported by the socket; and the discharge lamp attached to the fixture main body. The lighting device according to claim 1 or 2 to be lit.
[0016]
Since the lighting device provided in the lighting fixture of the present invention is the lighting device according to claim 1 or 2, the electrical insulation between the metal housing base of the case and the circuit board module can be achieved with a simple configuration and at a low cost. In addition, it is possible to provide a lighting fixture equipped with a lighting device suitable for obtaining waterproofness.
[0017]
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
[0018]
The luminaire denoted by reference numeral 1 in FIG. 1 is preferably used with waterproofness as an outdoor lamp, a tunnel lamp installed in a tunnel, an eaves lamp of a station building, or the like. The luminaire 1 includes a luminaire body 2, a lamp socket 3, a discharge lamp, for example, a straight fluorescent lamp 4, and a lighting device 5 that functions as an electronic ballast.
[0019]
The appliance main body 2 is made of metal and has a rectangular parallelepiped shape, and lamp sockets 3 project downward from both ends in the longitudinal direction, for example. The fluorescent lamp 4 is detachably supported by the lamp socket 3. A lighting device 5 for lighting the fluorescent lamp 4 is built in the instrument body 2. The lighting device 5 is configured as follows.
[0020]
As shown in FIGS. 2 to 4, the lighting device 5 includes a case 11, a circuit board module 21, an input wire connector 31 and an output wire connector 32, and a filling resin 41. .
[0021]
The case 11 has an accommodation base 12 and a cover 15 attached thereto, and has a long rectangular box shape. The seam 11a of the case 11, the ridges 11b of the four corners of the cover 15, and the mounting portion 11c of the external wire connector to be described later are provided with a weathering layer (not shown) that is cured by applying silicone resin or the like. However, in this case, it is possible to give the case 11 a more reliable waterproof property.
[0022]
The accommodation base 12 is made of metal, and one surface thereof (the upper surface in FIGS. 2 and 3) is opened. The housing base 12 has a base wall 12a opposite to the opening. The base wall 12a has a flat plate shape and has no hole. In the center portion in the width direction of the end wall 12b located at both ends in the longitudinal direction of the housing base 12, relief grooves 13 that open to the tip of the end wall 12b (the end opposite to the base wall 12a) are cut out. ing.
[0023]
The cover 15 is made of metal (it can also be made of synthetic resin), and one surface thereof (the lower surface in FIGS. 2 and 3) is opened. The cover 15 is disposed so as to be fitted to the outside of the housing base 12.
[0024]
Input and output relay connectors 17A and 17B are attached to both ends in the longitudinal direction of the cover 15, respectively. These relay connectors 17A and 17B have a first connection end 17a, a second connection end 17b, and a support protrusion 17c. The first connection end 17 a is exposed outside the end walls 15 b located at both ends in the longitudinal direction of the cover 15. An input external electric wire connector 18 is inserted and connected to the first connecting end 17a of the input relay connector 17A from the outside of the case 11, and an input electric wire (not shown) drawn into the instrument body 2 is connected to the electric wire connector 18. ) Terminals are plugged in and connected. Similarly, an output external electric wire connector 19 is inserted and connected to the first connection end 17a of the output relay connector 17B from the outside of the case 11, and one of the output electric wires (not shown) is connected to the electric wire connector 19. The terminal is plugged in and connected. The other end of the output electric wire is wired in the instrument body 2 so as to be connected to the lamp socket 3 or the like.
[0025]
The second connection end portions 17 b of the relay connectors 17 </ b> A and 17 </ b> B face the opening of the cover 15. The support protrusions 17c of the relay connectors 17A and 17B are in contact with the inner surface of the wall 15a facing the opening of the cover 15, and the relay connectors 17A and 17B are connected to the first connector end when connecting to the wire connector 31 or 32. 17a is provided so as to function as a stopper for preventing the 17a from escaping toward the wall 15a.
[0026]
The case 11 incorporates a circuit board module 21 that turns on the fluorescent lamp 4. The module 21 includes an electrically insulating circuit board 22 and a lighting circuit 23. The circuit board 22 has a long rectangular shape, and one surface thereof is used as a component mounting surface 22a, and the other surface on which a circuit pattern is printed is mainly used as a soldering surface 22b. The lighting circuit 23 is configured to include, for example, an inverter circuit portion by combining a semiconductor such as a transistor, a resistor, a capacitor, a coil, and other various electrical components, and is mounted on an intermediate portion of the circuit board 22 excluding both longitudinal ends. Most of the electrical components are mounted on the component mounting surface 22a.
[0027]
The lighting circuit 23 includes a plurality of electrical components mounted on the circuit board 22 by flow soldering. These electrical components have terminals 24. By passing the terminals 24 through the circuit board 22 and passing the flow solder layer, the lands of the circuit pattern are individually joined with solder 27 to the circuit board 22. Installed. In this way, it is preferable to attach the electrical component by flow soldering processing without regard to manual work in terms of good mass productivity.
[0028]
The high-voltage-side wire connector 31 is soldered to one end in the longitudinal direction of the circuit board 22, and the other low-voltage-side wire connector 32 is soldered to the other longitudinal end of the circuit board 22. Thus, by placing the lighting circuit 23 between the electric wire connectors 31 and 32 and arranging the electric wire connectors 31 and 32 at both ends in the longitudinal direction of the circuit board 22, the insulation distance between the electric wire connectors 31 and 32 is obtained. Can be secured sufficiently.
[0029]
Although the number of terminals and connecting portions of both wire connectors 31 and 32 and the size according to this number are different, both wire connectors 31 and 32 have the same configuration. That is, both the electric wire connectors 31 and 32 incorporate a plurality of conductive connection fittings (the main part of the fittings are not shown) in a connector case 33 made of synthetic resin, which is an electrically insulating member. It has the connection part 33a corresponding to a connection metal fitting. A plurality of terminals 34 (see FIGS. 5 and 6) projecting integrally from the respective connection fittings are projected on the surface of the connector case 33 located on the side opposite to the connection portion 33a.
[0030]
By passing these terminals 34 through the circuit board 22 and passing the flow solder layer together with the electrical components forming the lighting circuit 23, the terminals 34 are individually soldered to the input / output lands of the circuit pattern, 32 is electrically connected to the lighting circuit 23 and attached to the circuit board 22. Thus, it is preferable in terms of mass productivity that the both wire connectors 31 and 32 are attached to the circuit board 22 by the flow soldering process regardless of the manual operation.
[0031]
Furthermore, each of the connector cases 33 of the electric wire connectors 31 and 32 is provided with an insulating spacer 35 having a pair of rod shapes, for example. These insulating spacers 35 are made of the same type of electrically insulating synthetic resin as the connector case 33. The insulating spacer 35 can pass through a guide hole (not shown) provided through the connector case 33 in the direction connecting the connection portion 33a and the terminal 34, and is pushed from above the surface 33b on which the connection portion 33a is provided. It is provided as possible.
[0032]
Before the use of the electric wire connectors 31 and 32, the insulating spacer 35 protrudes from the surface 33b as shown in FIG. 5A and does not protrude from the other surface 33c of the connector case 33 from which the terminal 34 protrudes. The state is retained. This holding is performed by, for example, a lower end portion of the guide hole or the like, and the insulating spacer 35 is crushed by the pressing operation of the insulating spacer 35 to allow the insulating spacer 35 to pass therethrough. This can be realized by, for example, providing a temporary fixing portion made up of a plurality of bridges having a small cross section that is broken by the pushing operation and allows the insulating spacer 35 to pass therethrough.
[0033]
FIG. 5B shows a state in which the insulating spacer 35 is pushed in manually or by an automatic machine. In this state, the insulating spacer 35 is held by protruding from the surface 33c of the connector case 33 from which the terminal 34 is projected. The holding in this case is possible because the insulating spacer 35 is in pressure contact with the trace of the temporary fixing portion. The protruding length A of the pressed insulating spacer 35 from the surface 33 c is sufficiently longer than the protruding length of the terminal 34. The protruding length A is set to a length that can secure a necessary electrical insulation distance between the soldering surface 22 b of the circuit board 22 and the base wall 12 a of the housing base 12.
[0034]
The attachment of the electric wire connectors 31 and 32 to the circuit board 22 is performed in a state before the insulating spacer 35 is pushed. Thus, FIG. 6A shows a state in which the electric wire connectors 31 and 32 are soldered to the circuit board 22 by the flow soldering process. Therefore, since the insulating spacer 35 does not protrude from the soldering surface 22b in the flow soldering process, the lower end portion of the insulating spacer 35 may be deformed or melted with the flow soldering process, resulting in a malfunction. Absent.
[0035]
FIG. 6B shows a state in which the insulating spacers 35 of the two electric wire connectors 31 and 32 attached to the circuit board 22 are pushed and moved. In this case, since the insulating spacer 35 penetrates the circuit board 22, in order to enable this penetration, as shown in FIG. 7, a relief portion through which the insulating spacer 35 passes at both longitudinal ends of the circuit board 22. 25 is provided. The escape portion 25 is made of, for example, a through hole, but can be made by a notch instead. In addition, the code | symbol 26 in FIG. 7 has shown the terminal through-hole through which the terminal 34 of both the electric wire connectors 31 and 32 passes.
[0036]
The circuit board module 21 and the electric wire connectors 31 and 32 which are attached to both ends in the longitudinal direction and have the insulating spacers 35 protruding from the use position form the lighting circuit unit U. As shown in FIG. 6C, the lighting circuit unit U is placed on the base wall 12a with the insulating spacer 35 as a foot and is housed in the housing base 12. Since the housed lighting circuit unit U is supported at both ends in the longitudinal direction, it is provided in a stable housed state, and the soldering surface 22b of the circuit board 22 is provided by a distance corresponding to the protruding length A of each insulating spacer 35. Is provided away from the base wall 12a. Thereby, electrical insulation between the soldering surface 22b and the base wall 12a of the metal housing base 12 can be performed.
[0037]
Assembling of the lighting device 5 is completed by assembling the case 11 by fitting the cover 15 onto the housing base 12 in the assembled state of FIG. In this case, the second connecting end 17b of the relay connectors 17A and 17B that are already mounted in the cover 15 as the cover 15 is fitted to the housing base 12 is connected to the wire connector 31 or The connection end portion 17b and the connection portion 33a are connected to each other, and the lighting circuit unit U is pressed against the base wall 12a.
[0038]
For this reason, it can hold | maintain so that the lighting circuit unit U may not rattle in the assembled case 11. FIG. In addition, the input wire connector 31 and the external wire connector 18 are electrically connected via the input relay connector 17A, and the output wire connector 32 and the external wire connector 19 are connected via the output relay connector 17B. Are electrically connected.
[0039]
The filling resin 41 is provided as necessary, and a synthetic resin such as an unsaturated polyester resin having good thermal conductivity is used for this. The filling resin 41 is filled at least between the base wall 12a of the housing base 12 and the circuit board 22 as shown in FIG. In this filling, first, a predetermined amount of uncured filling resin 41 is injected into the housing base 12, and then the lighting circuit unit U is housed in the housing base 12 as described above to cure the uncured filling resin 41. Is provided. The filling resin 41 can also be provided so as to fill the entire case 11, and in this case, the water resistance can be further improved. However, the provision as in the present embodiment is preferable in that the increase in cost can be suppressed because the amount of the filling resin 41 used can be minimized while obtaining the required electrical insulation.
[0040]
The filling resin 41 is provided so as to cover the soldering surface 22b of the circuit board 22 so as not to touch moisture or moisture in the case 11. Thereby, tracking at the soldering surface 22b is prevented by the electrically insulating filling resin 41, and the waterproofness of the lighting device 5 can be improved. Furthermore, since the filling resin 41 functions as a heat transfer member, the heat generated in the lighting circuit unit U can be radiated to the housing base 12 through the filling resin 41 and can be released to the outside from the case 11. For this reason, the temperature rise of the lighting circuit unit U is prevented, and the risk of causing a malfunction in the inverter-type lighting circuit 23 can be suppressed. Note that the lighting device 5 having the above-described configuration may be attached to the fixture body 2 with its base wall 12a in close contact with the chassis of the fixture body 2, thereby transferring heat generated in the lighting circuit unit U to the chassis. Can be released.
[0041]
In the lighting device 5, it is indispensable to provide input / output wire connectors 31 and 32 at both ends in the longitudinal direction of the circuit board 22 included in the circuit board module 21. The above-described lighting device 5 uses the input / output wire connectors 31 and 32, and the insulating spacer 35 is provided in the electrically insulating connector case 33 of the wire connectors 31 and 32. At 35, the circuit board module 21 is supported at both ends in the metal housing base 12, and the soldering surface 22b of the circuit board 22 is held away from the base wall 12a.
[0042]
For this reason, it is possible to electrically insulate between the housing base 12 and the circuit board 22 without requiring special spacer parts. Furthermore, the electric wire connectors 31 and 32 are products having an electrically insulating synthetic resin connector case 33. Therefore, it is easy to change the shape and structure of the connector case 33, and the insulating spacer 35 can be easily provided on the connector case 33, which is highly feasible.
[0043]
As described above, the insulating spacer 35 of the connector case 33 provides a necessary insulating distance between the soldering surface 22b of the circuit board 22 and the base wall 12a. In order to obtain this arrangement, the base wall The base wall 12a can be made into a structure without a hole. For this reason, the structure of the storage base 12 is simplified, and the structure of a mold for press-molding the storage base 12 can be simplified. Therefore, it is possible to reduce the cost of the lighting device 5 as the molding cost of the housing base 12 is reduced.
[0044]
Moreover, since the insulating spacer 35 is electrically insulative, it is necessary to provide the circuit pattern by escaping the insulating spacer 35 so that a necessary electric insulation distance is secured between the insulating spacer 35 and the circuit pattern of the circuit board 22. Absent. For this reason, when the mounting density of the electrical components on the circuit board 22 is increased in order to reduce the size and the performance of the lighting device 5, the mounting position of the electrical components is not limited by the insulating spacer 35, and the circuit pattern There are no design restrictions.
[0045]
Further, since the base wall 12a of the box-shaped storage base 12 has a structure without a hole, when the electrically insulating filling resin 41 is filled between the base wall 12a and the soldering surface 22a of the circuit board 22. The filled resin 41 does not leak from the base wall 12a. For this reason, it is preferable when configuring the lighting device 5 that improves moisture resistance and waterproofness.
[0046]
The present invention is not limited to the one embodiment. The lighting unit may be one that lights the lamp normally, or one that lights in an emergency such as a power failure.
[0047]
According to the first aspect of the present invention, the electrical insulation between the metal housing base of the case housing the circuit board module and the circuit board module is simplified by using an input / output wire connector. In addition to being able to be obtained at a low cost with a simple structure, since the base wall of the housing base has no holes, it is possible to provide a lighting device suitable for obtaining waterproofness using a filling resin.
[0048]
According to the invention of claim 2, when the terminals of the electric wire connector are soldered to the circuit board with the flow solder, the insulating spacer is not melted or deformed by the heat of the molten solder. Therefore, it is possible to cause the insulating spacer to exhibit a predetermined function.
[0049]
According to the invention of claim 3, since the lighting device according to claim 1 or 2 is provided, electrical insulation between the metal housing base of the case and the circuit board module can be obtained at a low cost with a simple configuration. In addition, it is possible to provide a lighting fixture including a lighting device suitable for obtaining waterproofness.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a lighting apparatus according to an embodiment of the present invention.
2 is a perspective view showing a lighting device provided in the lighting fixture of FIG. 1. FIG.
3 is a cross-sectional view showing a lighting device provided in the lighting fixture of FIG. 1. FIG.
4 is an exploded cross-sectional view of a lighting device provided in the lighting fixture of FIG. 3;
FIG. 5A is a front view showing the electric wire connector of the lighting device provided in the lighting fixture of FIG. 1 in a state before the insulating spacer is pushed. (B) is a front view which shows the electric wire connector of the lighting device with which the lighting fixture of FIG. 1 is provided in the state into which the insulating spacer was pushed.
6A is a front view showing a wire connector soldered to a circuit board of a lighting device provided in the lighting fixture of FIG. 1 in a state before the insulating spacer is pushed. FIG. (B) is a front view which shows the electric wire connector soldered to the circuit board of the lighting device with which the lighting fixture of FIG. 1 is provided in the state into which the insulating spacer was pushed. (C) is sectional drawing which shows the state which accommodated the circuit board by which the electric wire connector of the lighting device with which the lighting fixture of FIG. 1 was soldered was accommodated in the accommodation base.
7 is a plan view showing one end portion of a circuit board of a lighting device provided in the lighting fixture of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 2 ... Appliance main body, 3 ... Lamp socket, 4 ... Fluorescent lamp (discharge lamp), 5 ... Lighting apparatus, 11 ... Case, 12 ... Housing base of a case, 12a ... Base wall of a housing base, 15 ... Cover of case, 21 ... Circuit board module, 22 ... Circuit board, 22b ... Soldering surface, 23 ... Lighting circuit, 24 ... Terminal of electrical component, 25 ... Escape part, 31 ... Electric wire connector for input, 32 ... For output Wire connector, 33 ... connector case, 34 ... terminal of wire connector, 35 ... insulating spacer, 41 ... filling resin, U ... lighting circuit unit

Claims (3)

A metal storage base having a base wall, and a case having a cover attached to the storage base;
An electrical insulating circuit board, and various electrical components mounted between both longitudinal ends of the board to form a lighting circuit, and a terminal through which the lighting circuit penetrates the circuit board are connected to the circuit board A circuit board module that includes an electrical component that is soldered and mounted on a soldering surface, the soldering surface being separated from the base wall and embedded in the case;
It has a synthetic resin connector case provided with an insulating spacer disposed between the base wall and the circuit board, and is electrically connected to the lighting circuit at both longitudinal ends of the circuit board. A wire connector for input and output,
A lighting device comprising: The wire connector is soldered by penetrating a terminal protruding from the connector case into the circuit board, and the insulating spacer is provided so as to be able to be pushed into the connector case. And a relief portion through which the insulating spacer passes is provided at each longitudinal end portion of the circuit board. The lighting device according to 1. An instrument body;
A lamp socket attached to the instrument body;
A discharge lamp removably supported by the socket;
The lighting device according to claim 1 or 2, wherein the discharge lamp is turned on by being attached to the appliance body,
The lighting fixture characterized by comprising.

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