JPH0745964A - Storage case - Google Patents

Abstract

(57) [Abstract] [Purpose] Protects the edge of the board 21, and also the board 21 and the bottom plate.
An end face opening of a gap provided between the substrate and the substrate is closed to prevent foreign matter, fingers, and the like from entering the underside of the substrate. [Structure] The storage case 31 includes a bottom plate 32, a cover 33, a pair of end plates 34, and a fastening member 81. The bottom plate 32 is an electrical component 22.
Support part that supports the board 21 on which the
Provide 43. The cover 33 has an opening on the lower surface and both end surfaces, and is provided with a length in the end direction shorter than that of the substrate 21.
Cover 21 and attach to bottom plate 32. The end plate 34 is formed of an insulating material and is provided with an end plate portion 61 that closes the end face opening of the cover 33.
A substrate cover portion 62 that covers the end portion of the substrate 21 is provided. The substrate cover portion 62 is provided with a closing portion 69 for closing the end face opening of the gap between the substrate 21 and the bottom plate 32. The fastening member 81 fastens the end plate 34 to the support portion 43 of the bottom plate 32 via the substrate 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage case for storing a board on which electric parts are mounted.

[0002]

2. Description of the Related Art Conventionally, this type of storage case is
As shown in FIGS. 6 to 8, it is used for housing a substrate 1 that constitutes an inverter lighting device for lighting equipment.

The substrate 1 has a printed wiring surface formed on the lower surface thereof, various electric components 2 are mounted on the upper surface thereof, and terminal portions 3 for connecting an electric wire from the outside are mounted on both end portions thereof. The lead wires of 2 and the terminal portion 3 are projected and connected to the printed wiring surface on the lower surface by soldering. Further, mounting holes 4 are formed at the four corners of the substrate 1.

A storage case 5 for storing the substrate 1
Is composed of a metal bottom plate 6 and a cover 7.

The bottom plate 6 is formed to have a substantially U-shaped cross section from a bottom plate portion 8 and a rising portion 9 which is erected upward from both side edge portions of the bottom plate portion 8. In the vicinity of both ends of the bottom plate portion 8, a pair of supporting portions 10 having a substantially L-shaped cross section is formed by cutting and raising upward, and each supporting portion 10 is provided with a screw hole 11. Further, locking portions 12 that bulge outward are provided near both ends of the rising portion 9.
Are formed.

In the cover 7, side plate portions 14 are bent downward from both side edges of the upper plate portion 13, and end plate portions 15 are bent downward from both end edges of the upper plate portion 13. ing. Engaging portions 16 that engage with the engaging portions 12 of the bottom plate 6 are formed so as to bulge inward in the vicinity of both longitudinal ends of the side plate portion 14. And
The opposing intervals of the both end plate portions 15 are narrower than the intervals of the terminal portions 3 mounted on both ends of the substrate 1, and the downward protruding length of the end plate portions 15 is formed smaller than that of the side plate portions 14.

To assemble the storage case 5,
The substrate 1 is placed on the support portion 10 of the bottom plate 6, and the screws 17 are attached to the substrate 1.
Through the mounting hole 4 of the
The cover 7 is attached to the bottom plate 6 from above. The cover 7 is attached by attaching each end plate portion 15 to each terminal portion 3 of the substrate 1 and the electric component 2.
And the side plate portion 14 is fitted to the outer surface of the rising portion 9 and moved downward, the engagement portion 16 of the side plate portion 14 is elastically engaged with the locking portion 12 of the bottom plate 6. Let

In the storage case 5 assembled in this way, the electric components 2 mounted on the substrate 1 are stored and protected in the cover 7, and the end portion of the substrate 1 projects from the cover 7 and the end portion thereof is projected. The terminal portion 3 mounted on the substrate is exposed to the outside, and an external electric wire for connecting to the circuit of the substrate 1 can be connected to the terminal portion 3.

[0009]

However, in the conventional storage case 5, since the printed wiring surface is formed on the lower surface of the substrate 1, the substrate 1 is supported by being separated from the bottom plate 6 upward. It is necessary to set a gap 18 between the printed wiring surface and the bottom plate 6 to secure an insulation distance. The end face of the gap 18 between the substrate 1 and the bottom plate 6 is open even in the case assembled state. Therefore, the gap
There is a risk that metal parts such as screws and washers or dust may enter the lower side of the substrate 1 from 18 to short-circuit the circuit of the substrate 1, or fingers may move from the gap 18 to the substrate 1 when the carrying case 5 is moved. There is a risk of entering the underside and touching the printed wiring surface. Moreover, since the edge of the substrate 1 projects from the cover 7, a hard object may hit the edge of the substrate 1 and damage it when the storage case 5 is handled.

Further, since the cover 7 only elastically joins the engaging portion 16 of the side plate portion 14 to the engaging portion 12 of the rising portion 9 of the bottom plate 6, when stress is applied to the cover 7, The cover 7 is likely to come off or laterally shift.

The present invention has been made in view of the above problems, and covers the end portion of the substrate and closes the gap between the substrate and the bottom plate to surely protect the substrate to be housed, and also to protect the cover and the bottom plate. It is an object of the present invention to provide a storage case that can be reliably connected to each other.

[0012]

The invention according to claim 1 is
A bottom plate having a supporting portion for supporting a board on which electrical components are mounted with a gap above, a bottom surface and both end surfaces being open, and having a length in the end direction shorter than the board, and covering the board to cover the bottom plate. A cover to be attached and an end plate portion for closing an end surface opening of the cover are provided, and a cover portion for covering an end portion of the substrate and a closing portion for closing an end surface opening of a gap between the substrate and the bottom plate are provided. An end plate made of an insulating material and a fastening member for fastening the end plate to the support portion of the bottom plate via the substrate are provided.

According to a second aspect of the present invention, in the first aspect of the invention, the bottom plate is provided with rising portions on both side edges, and the cover is provided with engaging holes near the ends of the side plate portions fitted inside the rising portions. The end plate is provided with a locking claw portion that engages with the locking hole on the side surface that fits inside the end portion of the cover, and the distance between the rising portion and the side plate portion is the locking claw portion and the locking hole. It is smaller than the engagement dimension with.

[0014]

According to the first aspect of the present invention, in the assembled state of the storage case, the substrate is supported on the support portion of the bottom plate with a gap upward, and the cover is attached to the bottom plate to cover the substrate and the end face of the cover. The end plate is attached to the base plate, and the end plate is fastened to the support portion of the bottom plate through the substrate by the fastening member. Then, the end portion of the substrate is covered by the substrate cover portion of the end plate, and the end face opening in the gap between the bottom plate and the substrate is closed by the closing portion of the end plate.

According to the second aspect of the invention, in addition to the operation of the first aspect of the invention, the side plate portion of the cover is interposed between the rising portion of the bottom plate and the end plate, and the locking claw portion of the end plate is formed. The cover is joined to the bottom plate by engaging with the engaging holes of the side plate portion of the cover. Since the distance between the rising portion and the side plate portion is set to be smaller than the engagement dimension between the locking claw portion and the locking hole, the side plate portion of the cover is locked in the rising direction of the bottom plate, that is, the engaging hole. When the side plate part comes into contact with the rising part and the movement is restricted when the side plate part moves in the direction of coming off from the claw part, the engagement state between the engagement hole and the locking claw part is ensured, and It is prevented from coming off.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the storage case of the present invention is shown in FIG.
It will be described with reference to FIGS.

In the figure, 21 is a substrate, and this substrate 21 is
For example, it constitutes an inverter lighting circuit for lighting equipment, is formed in a rectangular plate shape, a printed wiring surface is formed on the lower surface, various electric components 22 are mounted on the upper surface, and both ends are Terminals 23a and 23b for connecting electric wires from the outside are mounted, and the lead wires of the electric component 22 and the terminals 23a and 23b are projected and soldered to the printed wiring surface on the lower surface. In addition, the substrate 21
Mounting holes 24 are formed at the four corners of the.

Reference numeral 31 is a storage case, and this storage case 31 is
It is composed of a bottom plate 32, a cover 33, and a pair of end plates 34.

The bottom plate 32 is formed of a steel plate that has been subjected to vibration damping processing, and is formed in a substantially U-shaped cross section from the bottom plate portion 41 and the rising portions 42 that are raised from both side edges of the bottom plate portion 41. Has been done. Further, the length of the bottom plate 32 in the end direction is formed to be longer than that of the substrate 21.
It is formed slightly wider than the width of. Further, in the vicinity of both ends of the bottom plate portion 41, a pair of support portions 43 having a substantially L-shaped cross section for supporting the substrate 21 are formed by being cut and raised upward, and the support portions 43 are provided with screw holes 44.

The cover 33 is made of a steel plate that has been subjected to vibration damping processing, and has a cross section from the upper plate portion 51 and side plate portions 52 bent downward from both side edges of the upper plate portion 51. It is formed in a substantially U shape. Engagement holes 53 are provided in the vicinity of the lower end edges of both side plate portions 52. The length of the cover 33 in the end direction is shorter than the substrate 21 and is formed to correspond to the mounting range of the electric component 22, and the outer distance between the both side plate portions 52 is equal to the inner distance between the compatible upper portions 42 of the bottom plate 32. It is formed to have similar dimensions.

The end plate 34 is formed of an insulating material such as resin or ceramics, and an end plate portion 61 for closing the end face opening of the cover 33 and a substrate cover portion 62 for covering the end portion of the substrate 21 are integrally formed. Has been formed.

The end plate portion 61 is formed in a rectangular shape substantially conforming to the shape of the end surface of the cover 33, and a fitting portion 63 having a substantially U-shaped cross section for fitting inside the cover 33 is formed on the inner surface side of the end plate portion 61 so as to project therefrom. ing. Locking claw portions 64 that engage with the engaging holes 53 of the cover 33 are formed in the vicinity of the lower ends on both outer sides of the fitting portion 63, and the upper surface of the locking claw portion 64 is inclined downward. A tapered surface 65 is formed. Further, in the vicinity of the lower ends on both inner sides of the fitting portion 63, engagement step portions 66 that are continuous with the lower surface of the upper surface covering portion 67 described later and engage with the upper surfaces of both side edge portions of the substrate 21 are formed. .
The relationship between the engagement claw portion 64 and the engagement hole 53, such as the engagement dimension, will be described later in the operation.

The substrate cover portion 62 includes an upper surface cover portion 67 that covers the upper surface of the end portion of the substrate 21 and a side surface cover portion that covers both side surfaces of the end portion of the substrate 21.
68 is formed, and a closing portion 69 that closes the end face openings of the bottom plate 32 and the substrate 21 is formed. Top cover 67
In the center, rectangular insertion holes 70a, 70b for inserting the terminal portions 23a, 23b of the substrate 21 are formed in the center, and these insertion holes 70a, 70b are formed.
Mounting holes 71 are formed on both sides of a and 70b.

Further, 81 is a fastening member, and this fastening member 81
Comprises a mounting screw 82 and a washer 83, and the mounting screw 82 fitted with the washer 83 is screwed into the screw hole 44 of the support portion 43 of the bottom plate 32 through the mounting hole 71 of the end plate 34 and the mounting hole 24 of the substrate 21. To be done.

Next, the operation of this embodiment will be described.

To assemble the storage case 31, first, the fitting portions 63 of the end plate 34 are fitted and attached to both ends of the cover 33 from below. At this time, the tapered surface of the locking claw portion 64 of the end plate 34
65 hits the lower edge of the side plate 52 of the cover 33
52 is elastically deformed so that it expands, and the locking claw 64 covers.
When positioned in the engagement hole 53 of 33, the engagement hole 53 engages with the locking claw portion 64 by the elastic force of the side plate portion 52.

Subsequently, the both ends of the substrate 21 are fitted and assembled to the lower side of the substrate cover 62 of the both end plates 34 attached to the cover 33. At this time, the substrate 21 is inserted through the insertion holes 70a and 70b of the end plates 34.
Insert the respective terminal portions 23a and 23b.

Subsequently, both side plate portions 52 of the cover 33 are fitted inside the compatible upper portion 42 of the bottom plate 32, and the substrate 21 is supported by the support portion 43 of the bottom plate 32.
Place on top.

After this, a mounting screw 82 fitted with a washer 83
Through the mounting holes 71 of the end plate 34 and the mounting holes 24 of the substrate 21 into the screw holes 44 of the support portion 43, and the bottom plate 32, the substrate 21 and the end plate
34 is integrally fastened. By this fastening, the lower surface of the end plate 34 is brought into pressure contact with the bottom plate 32, and the substrate 21 is provided between the lower surface of the upper surface cover portion 67 of the substrate cover portion 62 of the end plate 34 and between the engagement step portion 66 and the support portion 43.
Is pinched.

In this way, the housing case 31 for housing the substrate 21 on the bottom plate 32 with the cover 33 and the end plate 34 is assembled.

In the assembled state of the storage case 31,
The terminal portions 23a and 23b project from the insertion holes 70a and 70b of the end plates 34 to the outside, and external terminals for connecting the circuit of the board 21 can be connected to the terminal portions 23a and 23b. Also, storage case 31
The board 21 housed inside is provided with a gap 91 between the printed wiring surface on the lower surface of the board 21 and the bottom plate 32, and an insulation distance is secured.

The end portion of the substrate 21 is the substrate cover portion of the end plate 34.
Since it is covered with 62, it is possible to prevent a hard object from hitting and damaging the substrate 21 when the storage case 31 is handled. In addition, since the end opening of the gap 91 between the substrate 21 and the bottom plate 32 is closed by the closing portion 69, the substrate 21 is removed from the gap 91.
Prevents metal parts such as screws and washers from entering underneath and dust, and prevents short circuits in the circuit board 21.
It is possible to prevent the printed wiring surface from coming into contact with the lower side of the board 21 from 91.

In the assembled state of the storage case 31, as shown in FIG. 2, the rising portion 42 of the bottom plate 32, the side plate portion 52 of the cover 33, and the fitting portion 63 of the end plate 34 are sequentially located from the outside, The engagement hole 53 and the locking claw portion 64 are engaged with each other between the rising portion 42 and the fitting portion 63. At this time, the thickness of the side plate portion 52 is t, and the rising portion 42 is
The distance between the side plate portion 52 and the side plate portion 52 is A, the distance between the side plate portion 52 and the fitting portion 63 is B, and the projection size of the locking claw portion 64 is C, and the engagement hole 53 and the locking claw portion 64 are engaged. If the dimension (CB) is set, the dimensional relationship of A <CB is set, that is, the rising portion 42 and the side plate portion 52.
The distance A between the engagement claw portion 64 and the engagement hole 53 is (C-
It is set smaller than B).

Therefore, even if the side plate portion 52 moves in the direction of the rising portion 42, that is, in the direction in which the engaging hole 53 falls off the locking claw portion 64, the side plate portion 52 abuts on the rising portion 42 and its movement is restricted. Since the engagement state between the engagement hole 53 and the locking claw portion 64 is ensured even at the time when the bottom plate 32 and the cover 33 are not removed.
The combined state with can be reliably maintained.

The projecting dimension C of the locking claw 64 is larger than the plate thickness t of the side plate 52, and the locking claw 64 rises from the engaging hole 53.
When projecting to the 42 side, the actual engagement dimension between the engagement hole 53 and the locking claw portion 64 is the plate thickness t of the side plate portion 52.

Further, since the end plate 34 is formed of an insulating material such as resin or ceramics, it is not necessary to provide an insulating distance between the end plate 34 and the substrate 21, and the storage case 31 can be downsized.

The engaging position of the engaging hole 53 of the cover 33 and the engaging claw portion 64 of the end plate 34 is the same as in the previous embodiment.
Not limited to the inner position of the above, but the same effect as that of the above-described embodiment can be obtained even if it is provided at a position above the rising portion 42 and exposed to the outside.

[0038]

According to the first aspect of the present invention, since the end portion of the substrate is covered with the substrate cover portion of the end plate, damage to the substrate can be prevented, and the closing portion of the end plate separates the substrate and the bottom plate. Since the end opening of the gap is closed, it is possible to prevent metal parts such as screws and washers and dust from entering the underside of the board and short-circuiting the circuit on the board. It is possible to prevent the surface from being touched, and thus it is possible to reliably protect the substrate to be stored in the storage case.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the side plate portion of the cover is interposed between the rising portion of the bottom plate and the end plate, and the locking claw of the end plate is provided. In the connecting structure in which the cover portion is engaged with the engaging hole of the side plate portion of the cover to connect the cover to the bottom plate, the distance between the rising portion and the side plate portion of the cover is determined by the engagement dimension between the engaging claw portion and the engaging hole. By setting it smaller, even if the side plate part of the cover moves in the direction of the rising part of the bottom plate, that is, in the direction in which the engagement hole comes off the locking claw part, the engagement state of the engagement hole and the locking claw part Can be secured and the cover can be prevented from coming off the bottom plate.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a storage case of the present invention.

FIG. 2 is a partial cross-sectional view showing an engaged state of an engaging claw portion and an engaging hole of the above embodiment.

FIG. 3 is a cross-sectional view of a part of the above-described embodiment as seen from a side surface with a cutout.

FIG. 4 is a sectional view of the same embodiment as seen from the end face direction.

FIG. 5 is a perspective view of the above embodiment in an assembled state.

FIG. 6 is a perspective view of a conventional storage case in an exploded state.

FIG. 7 is a cross-sectional view of the conventional example seen from a side surface direction with a part cut away.

FIG. 8 is a sectional view of the conventional example seen from the end face direction.

FIG. 9 is a perspective view of the above conventional example.

[Explanation of symbols]

 21 Circuit board 22 Electrical parts 31 Storage case 32 Bottom plate 33 Cover 34 End plate 42 Vertical part 43 Support part 52 Side plate part 53 Engagement hole 61 End plate part 62 Board cover part 64 Locking claw part 69 Closing part 81 Fastening member 91 Gap

Claims (2)

[Claims] 1. A bottom plate having a support portion for supporting a board on which electrical parts are mounted with a gap above, a bottom surface and both end surfaces of which are open, and a length in the end portion direction shorter than the board is provided to cover the board. A cover to be attached to the bottom plate, and an end plate portion for closing an end face opening of the cover, and a substrate cover portion covering the end portion of the substrate and an end face opening of a gap between the substrate and the bottom plate. A storage case, comprising: an end plate made of an insulating material provided with a closing part; and a fastening member for fastening the end plate to a support part of the bottom plate via the substrate. 2. The bottom plate is provided with rising parts on both side edges, the cover is provided with engaging holes near the ends of the side plate parts fitted inside the rising parts, and the end plates are fitted inside the ends of the cover. A side surface is provided with a locking claw portion that engages with the locking hole, and a distance between the rising portion and the side plate portion is smaller than an engagement dimension between the locking claw portion and the locking hole. The storage case according to item 1.