JP5703446B2 - Housing structure and discharge lamp lighting device - Google Patents

Description

  The present invention relates to, for example, a metal housing that houses an electronic device, and more particularly, to a housing structure and a discharge lamp lighting device that houses a ballast for illumination.

2. Description of the Related Art Conventionally, a housing structure is known that includes attachment means for attaching a case lid to a case body so as to cover a printed wiring board (see, for example, Patent Document 1).
In Patent Document 1, the attachment means includes a plurality of first projecting pieces provided on the leg pieces and projecting to face the first side pieces, and a plurality of mounting means provided on the case lid and projecting to face the leg pieces. The second projection piece.
In Patent Document 1, the case main body and the case lid are attached to each other by the first protrusion and the second protrusion being engaged with each other.

Conventionally, a housing structure having an electromagnetic device main body, a lead wire connected to the electromagnetic device main body, a case having an opening, storing the electromagnetic device main body from the opening and pulling out the lead wire is known. (For example, refer to Patent Document 2).
Patent Document 2 includes a lead wire holding body that is held on the case side and has a holding portion that detachably holds the middle of the lead wire from a direction that intersects the longitudinal direction of the lead wire.

JP 2009-152082 A (FIG. 1, claim 1) Japanese Patent Laid-Open No. 2001-244131 (FIG. 1, claim 1)

Patent document 1 can perform the electrical connection of a case main body and a case cover reliably.
In Patent Document 2, it is possible to prevent a load from being applied to the connecting portion between the lead wire and the electromagnetic device main body, and the lead wire can be easily attached to the lead wire holding body, thereby improving the assemblability.

By the way, as shown in FIG. 13, a housing structure in which the electric wire 103 is drawn from between the first housing 101 and the second housing 102 has been proposed as in Patent Document 1 and Patent Document 2.
In such a conventional housing structure, a wiring substrate 104 to which an electric wire 103 is connected is accommodated in a first housing 101.
In the conventional case structure, the first case 101 has a slit 105, and the electric wire 103 is drawn out through the slit 105 and connected outside.
In the conventional case structure, the second case 102 has a screw insertion hole 107 corresponding to the screw hole 106 provided in the first case 101.

As shown in FIG. 14, in the conventional case structure, after the electric wire 103 is arranged in the slit 105, the first case 101 and the second case 102 are connected to the opening of the second case 102. One housing 101 is inserted, and the screw 108 is screwed into the screw hole 106 from the screw insertion hole 107.
However, in such a conventional case structure, the electric wire 103 tends to escape upward in FIG.
For this reason, the wire 103 may be damaged at the edge portion 109 of the second housing 101, or may be damaged at the edge portion 110 of the slit 105 of the first housing 101 when the wiring board 104 is accommodated in the first housing 101. There is a risk of doing.

Therefore, as shown in FIG. 15, a conventional housing structure has been proposed in which a bushing 111 such as rubber is fitted into the slit 105 and the wire 103 is passed through the bushing 111 to prevent damage to the coating of the wire 103. Yes.
In addition, as shown in FIG. 16, there has been proposed a conventional housing structure that prevents damage to the covering of the electric wire 103 by covering the electric wire 103 with a protective tube 112 without using a bushing.
Furthermore, unlike these, the conventional housing which prevents damage to the coating of the electric wire 103 by surface-treating the edge portion 109 of the second housing 101 and the edge portion 110 of the slit 105 of the first housing 101. Body structure has been proposed.

Note that these conventional casing structures use at least two screws 108 for fixing the first casing 101 and the second casing 102.
This is because it is necessary to ensure electrical connection between the first housing 101 and the second housing 102 for safety.

In these conventional case structures, the first case 101 and the second case 102 may be fixed using a claw-like part instead of the screw 108. In this case, however, the mechanical strength is high. It is not enough and electrical connection cannot be ensured reliably.
Therefore, the conventional case structure is costly when the first case 101 and the second case 101 are subjected to surface punching or the bushing 111 or the protective tube 112 is used.
Further, the conventional case structure has poor assembling workability because the two screws 108 are used for fixing the first case 101 and the second case 102.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a casing structure and a discharge lamp lighting device that can easily protect the coating of an electric wire with an inexpensive structure and can improve assembly workability. It is to provide.

  The housing structure according to the present invention has a built-in wiring board to which an electric wire is connected, and covers a substantially rectangular parallelepiped metal first housing whose one surface is open, and one open surface of the first housing. In the case structure in which the electric wire is led out through a slit provided in the first case and connected to the outside. A fitting portion is provided between the body and the second housing, and a side of the second housing adjacent to the fitting portion is bent toward the opening of the first housing. In the fitting portion, the second housing is bent toward the inner side of the first housing, and the fitting portion includes a groove provided in the slit, and a groove of the second housing. And the first housing and the first surface of the first housing on a surface opposite to the surface having the slit. And the housing is screwed.

  In the housing structure according to the present invention, the first housing has at least one projecting structure toward the inside so that the width of the first housing is reduced.

  In the housing structure according to the present invention, in the slit, the connection point between the electric wire and the wiring board is disposed at a position off the extended line of the slit position, and the first housing includes the slit. The portion has two projecting structures toward the inside so that the width becomes smaller, and the projecting structures have different projecting dimensions.

  The discharge lamp lighting device according to the present invention has a housing structure.

  According to the housing structure and the discharge lamp lighting device according to the present invention, it is possible to easily protect the coating of the electric wire with an inexpensive structure and to improve the assembly workability.

1 is an exploded perspective view of a housing structure and a discharge lamp lighting device according to a first embodiment of the present invention. 1 is a perspective view of an external appearance of a housing structure and a discharge lamp lighting device according to a first embodiment of the present invention. Sectional drawing around the electric wire of the housing structure and discharge lamp lighting device of the first embodiment according to the present invention 2 is an exploded perspective view of a housing structure and a discharge lamp lighting device according to a second embodiment of the present invention. An exploded perspective view of a housing structure and a discharge lamp lighting device according to a third embodiment of the present invention. External appearance perspective view of housing structure and discharge lamp lighting device according to third embodiment of the present invention Partially cutaway front view around the slit of the casing structure and discharge lamp lighting device of the fourth embodiment according to the present invention The partially broken front view around the slit of the housing structure and discharge lamp lighting device of the fifth embodiment according to the present invention An exploded perspective view of a casing structure and a discharge lamp lighting device according to a sixth embodiment of the present invention. External appearance perspective view of housing structure and discharge lamp lighting device of sixth embodiment according to the present invention The partially broken front view around the slit of the housing structure and discharge lamp lighting device of the sixth embodiment according to the present invention Partially cutaway front view around the slit of the casing structure and discharge lamp lighting device of the seventh embodiment according to the present invention Exploded perspective view of conventional housing structure External perspective view of conventional housing structure Side sectional view around the electric wire of another conventional housing structure Side sectional view around the electric wire of another conventional housing structure

Hereinafter, a plurality of embodiments of a housing structure and a discharge lamp lighting device according to the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, a discharge lamp lighting device 10 to which the housing structure of the first embodiment according to the present invention is applied includes a first housing 11 and a second housing 12.
The first housing 11 includes a bottom plate 13, a pair of side plates 14 and 15, and a pair of end plates 16 and 17, and has a slit 18 cut out in one end plate 16 in a U shape. The slit 18 has a pair of grooves 19 for fitting in the lateral direction.

The second housing 12 includes a top plate 20, a pair of side plates 21 and 22, a first fitting piece 23, a second fitting piece 24, a third fitting piece 25, and a tongue piece 26. .
The first fitting piece 23 is formed in an L shape from one edge of the top plate 20 and bent at the bent portion 27.
The second fitting piece 24 is formed by being bent into an L shape in the same direction as the first fitting piece 23 from one edge of the top plate 20.

The third fitting piece 25 is formed by being bent into an L shape in the same direction as the second fitting piece 24 from the other edge of the top plate 20.
The tongue piece 26 protrudes from the other edge of the top plate 20 toward the second housing 12 and has a screw insertion hole 28.
In the second housing 12, the first fitting piece 23 is fitted into the groove 19 of the first housing 11.

As for the 1st housing | casing 11, the edge part of the slit 18 is surface-finished for the covering protection of the electric wire 29. FIG.
In the second housing 12, the side plates 21 and 22 adjacent to the first fitting piece 23 are bent toward the opening 30 of the first housing 11, and when the side plates 21 and 22 are fitted, Enters the inside of one housing 11.

At this time, the bending of the side plates 21 and 22 has a function of improving the mechanical strength of the second housing 12 and a function of reducing the gap with the first housing 11 after the fitting. As a guide.
The first housing 11 is fitted with a second fitting piece fitting hole 31 into which the second fitting piece 24 is fitted and a third fitting piece 25 in order to ensure the fixing strength with the second housing 12. A third fitting piece insertion hole 32 to be formed and a screw hole 33 corresponding to the screw insertion hole 27 of the tongue piece 26 are provided.
The first housing 11 accommodates a wiring board 34 to which an electric wire 29 is electrically connected on a bottom plate 13 surrounded by a pair of side plates 14 and 15 and a pair of end plates 16 and 17.

As shown in FIG. 2, in assembling the discharge lamp lighting device 10, the wiring board 34 is dropped inside the first housing 11, and the electric wire 29 is drawn out through the slit 18.
Next, the first housing 11 is advanced from above toward the second housing 12, and the side plates 21 and 22 of the second housing 12 are inserted inside the first housing 11.
Then, the second housing 12 is slid along the longitudinal direction of the first housing 11.
Accordingly, in the second housing 12, the first fitting piece 23 is fitted into the groove 19 of the slit 18 of the first housing 11, and the second fitting piece 24 is the second fitting piece of the first housing 11. It is inserted into the insertion hole 31.

At the same time, the third fitting piece 25 is fitted into the third fitting piece fitting hole 32 of the first housing 11, and the screw insertion hole 27 of the tongue piece 26 coincides with the screw hole 33 of the first housing 11 and temporarily. It becomes a fixed state.
Then, from this temporarily fixed state, a single screw 35 is screwed into the screw hole 33 of the first housing 11 from the screw insertion hole 28 of the tongue piece 26, whereby the first housing 11 and the second housing 12. And assembled.

Thus, by screwing from the tongue piece 26 on the other side of the top plate 20 of the second housing 12, the first fitting piece 23 and the second fitting piece 24 of the second housing 12 become the first housing. It is attracted to the body 11 and firmly fixed in a close contact state.
Therefore, the assembly can be simplified and the workability can be greatly improved by using only one screw 35 as compared with the case where two screws are used as in the conventional case.

As shown in FIG. 3, since the first fitting piece 23 is bent toward the inside of the first housing 11, even if the electric wire 29 tends to escape upward after fitting, the second housing 12 The wire 29 does not touch the edge portion of the wire, and the covering of the wire 29 is not damaged.
Therefore, the surface punching process for the second housing 12 is not necessary.
Here, as the material of the second housing 12, a material such as a steel plate or aluminum is suitable in consideration of workability, and a thickness of about 0.5 mm to 2 mm is appropriate in consideration of strength and workability. is there.

Moreover, workability can be improved by setting the corner radius of the bent portion 27 of the first fitting piece 23 to be equal to or greater than the plate thickness of the second housing 12.
In addition, as the electric wire 29 used as the ballast for illumination applied to the discharge lamp lighting device 10, the cross-sectional area is preferably 0.75 mm ² or more.

As described above, according to the case structure of the first embodiment according to the present invention described above, when the electric wire 29 is about to escape to the second case 12 side, it comes into contact with the bent portion 27 of the first fitting piece 23. This will not damage the coating.
Further, according to the case structure, the first case 11 and the second case 12 are connected to one end plate 17 on the side opposite to the one end plate 16 provided with the slit 18 of the first case 11. Secure with screws 35.

Thereby, according to the housing structure, the number of screws 35 can be reduced to one, and the second housing 12 can be moved to the second housing 12 by tightening the second fitting piece 24 and the third fitting piece 25 of the second housing 12. One housing 11 can be securely adhered, and mechanical strength can be secured.
Therefore, according to the housing structure, the covering of the electric wire 29 can be easily protected with an inexpensive structure, and the assembly workability can be improved.

  Moreover, according to the discharge lamp lighting device 10 of the first embodiment of the present invention, the cover of the electric wire 29 can be easily protected with an inexpensive structure, and the productivity can be improved by the casing structure that can improve the assembly workability. .

(Second Embodiment)
Next, a housing structure and a discharge lamp lighting device according to a second embodiment of the present invention will be described.
In the following embodiments, components that are the same as those in the first embodiment described above or components that are functionally similar are denoted by the same or corresponding reference numerals in the drawings, and the description thereof is simplified or omitted. To do.

As shown in FIG. 4, the discharge lamp lighting device 40 to which the housing structure of the second embodiment according to the present invention is applied is an extension extended from the top plate 20 near the center of the other edge of the top plate 20. A second housing 41 having a portion 42 is provided.
The extension portion 42 has a length dimension L2 that is larger than the length dimension L1 from the end portions of the side plates 21 and 22 to one edge portion of the top plate 20 in the top plate 20 of the second housing 12.
This is because the second housing 12 is held on the first housing 11 by the extension 42 during the sliding movement during the fitting.

  According to the housing structure and the discharge lamp lighting device 40 of the second embodiment according to the present invention, the second housing 12 is prevented from falling when the second housing 12 is slid on the first housing 11. This can further improve the assembly workability.

(Third embodiment)
Next, a housing structure and a discharge lamp lighting device according to a third embodiment of the present invention will be described.
As shown in FIGS. 5 and 6, the discharge lamp lighting device 50 to which the housing structure of the third embodiment according to the present invention is applied is disposed outside the first housing 11 at the time of temporary fixing and fitting. A second housing 51 having a pair of side plates 52 and 53 is provided.

According to the housing structure and the discharge lamp lighting device 50 of the third embodiment according to the present invention, when the second housing 51 is disposed on the first housing 11, the pair of side plates 52 of the second housing 51. , 53 are arranged outside the first housing 11.
Therefore, according to the housing structure and the discharge lamp lighting device 50 of the third embodiment, the second housing 51 can be prevented from dropping, and the assembly workability can be further improved.

(Fourth embodiment)
Next, a housing structure and a discharge lamp lighting device according to a fourth embodiment of the present invention will be described.
As shown in FIG. 7, a discharge lamp lighting device 60 to which the housing structure of the fourth embodiment according to the present invention is applied includes a first housing 61 having a slit 63 with a pair of protrusions 62 protruding inward. Prepare.
In the first housing 61, the width dimension of the slit 63 is reduced by the protrusion 62. The corner portion 64 of the protrusion 62 is subjected to a curved surface process and a surface punching process so as not to damage the coating of the electric wire 29.

According to the housing structure and the discharge lamp lighting device 60 of the fourth embodiment according to the present invention, after the wiring board 34 is accommodated in the first housing 11, the first housing 11 and the second housing 12 are connected. In the fitting operation, the range in which the electric wire 29 moves can be limited.
Therefore, according to the housing structure and the discharge lamp lighting device 60 of the fourth embodiment, it is possible to reliably prevent the electric wire 29 from escaping to the second housing 12 side during fitting.

(Fifth embodiment)
Next, a housing structure and a discharge lamp lighting device according to a fifth embodiment of the present invention will be described.
As shown in FIG. 8, a discharge lamp lighting device 70 to which the housing structure of the fifth embodiment according to the present invention is applied includes a first housing 71 having a slit 73 with a pair of protrusions 72 protruding inward. Prepare.
In the first housing 71, the radius of the curved surface processing of the upper corner portion 74 disposed in front of the protrusion 72 when the electric wire 29 is passed through the slit 73 is arranged rearward after the electric wire 29 is passed through the slit 73. It is larger than the radius of curved surface processing of the lower corner portion 75.

  According to the housing structure and the discharge lamp lighting device 70 of the fifth embodiment of the present invention, it is easy to pass the electric wire 29 when passing it through the slit 73, and it is difficult for the electric wire 29 to come off after passing through the slit 73. Can dramatically improve performance.

(Sixth embodiment)
Next, a housing structure and a discharge lamp lighting device according to a sixth embodiment of the present invention will be described.
As shown in FIGS. 9 and 10, a discharge lamp lighting device 80 to which the housing structure of the sixth embodiment according to the present invention is applied includes an electric wire 29 and a wiring board 34 in a slit 82 provided in the first housing 81. Is located at a position deviating from the extension of the slit 82 position.
In the discharge lamp lighting device 80, the power terminal block 83 is attached to the outer surface of the one end plate 16 of the first housing 81.
When the discharge lamp lighting device 80 is applied to a ballast for lighting, it is generally installed indoors instead of in a fixture, and a VVF cable or the like is generally used for connecting a power line. A power terminal block 83 is used as the input terminal.

As shown in FIG. 11, the first housing 81 has a pair of protrusions 84 and 85 inward so that the width of the slit 82 is reduced, and one protrusion 85 is connected to the other protrusion 84. Compared to the protruding dimensions.
The slit 82 can reliably prevent the electric wire 29 from escaping in the upper right direction in FIG. 11 because one projection 85 has a larger projection dimension than the other projection 84.

  According to the housing structure and the discharge lamp lighting device 80 of the sixth embodiment of the present invention, when the power terminal block 83 is installed, the electric wire 29 is hardly detached from the slit 82, and the assembly workability is greatly improved. Can be improved.

(Seventh embodiment)
Next, a housing structure and a discharge lamp lighting device according to a seventh embodiment of the present invention will be described.
As shown in FIG. 12, the discharge lamp lighting device 90 to which the housing structure of the seventh embodiment according to the present invention is applied has a first housing 91 on the inner side so that the width becomes small in the slit 92. It has a single protrusion 93 toward it.
The slit 92 protrudes inward with a single protrusion 93 having a gap slightly larger than the outer diameter of the electric wire 29.

  According to the housing structure and the discharge lamp lighting device 90 of the seventh embodiment of the present invention, when the power terminal block 83 is installed, the electric wire 29 is not easily detached from the slit 92 by a simple structure, and the assembly work is performed. Can dramatically improve performance.

  In addition, in the housing structure and the discharge lamp lighting device of the present invention, the electric wire, the wiring board and the like are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

10, 40, 50, 60, 70, 80, 90 Discharge lamp lighting device 11, 61, 71, 81, 91 First housing 12, 41, 51 Second housing 18, 63, 73, 82, 92 Slit 19 Groove (fitting part)
23 First fitting piece (fitting part)
29 Electric wire 34 Wiring board

Claims (4)

A first casing made of a substantially rectangular parallelepiped metal having a built-in wiring board to which an electric wire is connected and having one surface open;
A second housing made of metal that is fitted so as to close the opened surface of the first housing;
In the housing structure in which the electric wire is connected to the outside through the slit provided in the first housing,
A fitting portion is provided between the first housing and the second housing,
The side of the second housing adjacent to the fitting portion is bent toward the opening of the first housing,
In the fitting portion, the second housing is bent toward the inside of the first housing,
The fitting portion is formed by a groove provided in the slit and a bent portion of the second housing,
A housing structure in which the first housing and the second housing are screwed on a surface opposite to the surface having the slit of the first housing. The housing structure according to claim 1,
The first housing has a housing structure having at least one projecting structure toward the inside so that the width of the first housing is reduced in the slit. The housing structure according to claim 1,
In the slit, the connection point between the electric wire and the wiring board is arranged at a position off the extended line of the position of the slit,
The first housing has two projecting structures toward the inside so that the width of the slit portion is reduced.
The projecting structure is a housing structure with different projecting dimensions.   A discharge lamp lighting device having the housing structure according to any one of claims 1 to 3.

Images