JPH0559827U - Assembly structure of discharge lighting device - Google Patents

Abstract

(57) [Abstract] [Purpose] The cost of housing members can be reduced, the assembly can be easily automated, the mounting density can be improved, and the device can be downsized.
Provided is an assembly structure of a discharge lighting device which can be made thin. [Structure] At least one of a plurality of casing members 1 and 2 for assembling a device main body surrounding a printed circuit board 4 on which electronic components 9 and the like are mounted has a flat plate shape, and the casing members 1 and 2 are fitted to each other. And then assemble.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an assembly structure of a discharge lighting device equipped with a printed board on which a ballast for lighting a discharge lamp and electronic parts are mounted.

[0002]

[Prior Art]

 FIG. 6 is a perspective view showing the structure of a conventional discharge lighting device, and FIG. 7 is a sectional view showing the internal structure thereof. In the figure, 11 is a case body, 12 is a case lid, 13 is a connecting portion of the case body 11 and the case lid 12, 4 is a printed circuit board on which electronic components are mounted, 5 is a housing for protecting the charging section, and 6 is An insulating base for protecting the printed circuit board on which the electronic component is mounted, 7 is a terminal, 8 is a mounting hole, and 9 is an electronic component mounted on the printed circuit board.

In the above-mentioned conventional example, the case body 11 and the case lid 12 which form the housing are bent into a U-shaped or U-shaped cross section, and the joint portion 13 is formed in a part of the case lid 12. The protruding piece is fitted into the notched hole portion of the case main body 11 to form. The printed circuit board 4 on which the electronic component 9 is mounted is held while being insulated from the case body 11 by the insulating base 6, and is housed in a state surrounded by the case body 11 and the case lid 12.

[0004]

[Problems to be solved by the device]

 In the above-described conventional assembly structure of the discharge lighting device, since both the case body 11 and the case lid 12 are bent, the dimensions of the bending work of both play an important role in fitting. However, there was a problem that the cost of parts was high.

Further, since the bent parts are fitted to each other, there is a problem in that the positional alignment between the case main body 11 and the case lid 12 in the width direction needs to be accurate, and automation of the assembly cannot be easily performed. Further, the electronic component 9 includes a power switching element, which is a heating element, and the like, and these elements are surrounded by the case body 11 and the case lid 12, so that the temperature of the element becomes high. Therefore, it is necessary to attach a large heat-dissipating plate or increase the size of the case formed of the case body 11 and the case lid 12 so as not to reduce the reliability. There was also a problem that it could not be realized.

Therefore, an object of the present invention is to provide a discharge lighting device capable of reducing the member cost, facilitating the automation of assembly, improving the mounting density, and reducing the size and thickness of the device. It is to provide an assembly structure.

[0007]

[Means for Solving the Problems]

 In the discharge lighting device assembling structure according to the present invention, the housing enclosing the printed circuit board is composed of a plurality of members, and at least one of the housing members is formed into a flat plate shape so that the housing members are fitted to each other and assembled. There is. In addition, an electronic component or the like is mounted by forming a conductor pattern on the back surface of a flat plate-shaped casing member with an insulating material interposed.

[0008]

[Action]

 According to the configuration of the present invention, since at least one of the housing members has a flat plate shape, it is possible to perform member processing according to this member, which facilitates processing and reduces cost. it can. In addition, alignment is easier than when bending members are fitted together. Since the electronic components can be mounted on this part using the back surface of the flat plate-shaped member, it is not necessary to provide a heat sink separately, the mounting density of electronic components can be increased, and the device can be downsized, It can be made thinner.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 are a perspective view and a cross-sectional view showing an assembly structure of a discharge lighting device according to a first embodiment of the present invention, in which a case body 1 and a case lid 2 which are cases are configured as shown in FIGS. 7 is different from the conventional example, the other components are the same as those of the conventional example, and the same reference numerals are the same.

The case lid 2 is formed in a flat plate shape, the case body 1 is processed into a concave shape in cross section, and the projection piece 3 provided on the case lid 2 is fitted into the opening 10 formed in the case body 1. The two are combined. Details of the binding are shown in FIGS. 3 (a) and 3 (b). The figure (a) shows the state before mating, and the figure (b) shows the state after mating. As for the coupling, the projection piece 3 of the case lid 2 is fitted in the opening 10 of the case body 1 in the direction of the arrow as shown in FIG. The projection piece 10a is fitted into the fitting hole 3a provided in the projection piece 3 on the case lid 2 side.

As described above, since one of the housing members is formed in a flat plate shape, the housing member itself can be easily processed in accordance with this member, and the case body 1 and the case lid 2 can be fitted together. Can be performed without requiring high precision in alignment. Therefore, the assembly can be easily automated. FIG. 4 is a cross-sectional view showing the configuration of the second embodiment, in which a case main body 21 serving as a housing member for holding the printed circuit board 4 is formed in a flat plate shape, and a case lid 22 serving as another housing member. Are formed in an inverted V shape. The two are joined by fitting a projection piece 23 provided on the case lid 22 into a hole portion of the case body 21. With this configuration, the same effect as that of the first embodiment can be obtained. Also, the same effect can be obtained by forming the casing by forming the casing members having flat sides on all sides having a triangular cross section and fitting them together.

FIG. 5 is a cross-sectional view showing the structure of the third embodiment, in which an insulating material 30 is provided on the back surface of the flat case lid 2 of the first embodiment, and a conductor pattern 31 is formed thereon. And the power switching element 32, which is a heat generating component, is mounted. Further, the electronic component 9 mounted on the printed circuit board 4 is connected by the connector 33 to the pattern 31 on which the power switching element 32 and the like are mounted.

In this embodiment, since the heat-generating component such as the power element is mounted on a part of the housing member, it is possible to improve the heat dissipation without separately providing a heat dissipation plate, and to improve the reliability of the discharge device. Can be improved. In addition, since the space inside the housing can be effectively used for mounting, the mounting density can be increased, and the device can be made smaller and thinner.

[0014]

[Effect of the device]

 According to the assembly structure of the discharge lighting device of the present invention, at least one of the casing members is formed into a flat plate shape, and the casing member is processed according to this member, which facilitates the processing and reduces the cost of the member. Can be planned. In addition, the alignment becomes easier than when the bent members are fitted together, and the assembly can be automated. In addition, the electronic components can be mounted on this part using the back surface of the flat plate member, eliminating the need for a separate heat sink, increasing the reliability of the device and increasing the mounting density of electronic components. Therefore, the device can be made smaller and thinner.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of the first embodiment.

3 (a) and 3 (b) are perspective views illustrating a combined state of the housing members in the first embodiment.

FIG. 4 is a cross-sectional view showing the configuration of the second embodiment.

FIG. 5 is a cross-sectional view showing the configuration of the third embodiment.

FIG. 6 is a perspective view showing a configuration of a conventional example.

FIG. 7 is a sectional view showing a configuration of a conventional example.

[Explanation of symbols]

 1 Case Main Body (Housing Member) 2 Case Lid (Housing Member) 3 Projecting Piece 4 Printed Circuit Board 9 Electronic Component 10 Opening 30 Insulating Material 31 Conductor Pattern

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area // F21V 23/02 Z

Claims (2)

[Scope of utility model registration request] 1. An assembly structure of a discharge lighting device, which is assembled by surrounding a printed circuit board on which a ballast for lighting a discharge lamp, electronic parts and the like are mounted with a housing, wherein the housing is composed of a plurality of members. An assembling structure of a discharge lighting device, characterized in that at least one of the housing members is formed in a flat plate shape, and the housing members are fitted to each other and assembled. 2. The assembly structure of a discharge lighting device according to claim 1, wherein a conductor pattern is formed on the back surface of the flat plate-shaped casing member with an insulating material interposed therebetween to mount an electronic component or the like.