JP2588408Y2 - Board mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board mounting apparatus that can easily mount a board.

[0002]

2. Description of the Related Art In an electric device such as a video deck, screws are generally used to mount a substrate on a chassis or a plastic cabinet for mounting various components. However, when screws are used, the number of components increases and the cost increases, and a board mounting device as shown in FIG. 4 has also been used.

In FIG. 4, reference numeral 10 denotes a video deck chassis. The chassis 10 has a bottom plate 10a and a side plate 10b erected upward from an edge thereof. The bottom plate 10a is provided with a pair of elastic ribs 12 and a plurality of mounting portions 14 for mounting the substrate 18 thereon. The elastic rib 12 has claw-shaped locking pieces 16 for locking the substrate 18, and the locking pieces 16 face each other. The board 18 is sandwiched between the locking piece 16 and the mounting portion 14. This not only restricts the vertical movement of the substrate 18, but also restricts the lateral movement of the substrate 18 because the side surface of the substrate 18 is sandwiched between the elastic ribs 12 on both sides.

The elastic rib 12 and the mounting portion 14 are formed integrally with the chassis 10 by molding. In order to mount the substrate 18,
It is only necessary to mount the board 18 on the base plate 4 and hang the locking piece 16, and it is possible to omit the operation of forming a screw hole and attaching a screw to the chassis 10, and it is possible to easily attach the board 18. become.

[0005]

However, in the conventional board mounting apparatus shown in FIG. 4, if a strong impact is given by, for example, dropping of the chassis 10 or a device body incorporating the same, as shown by a virtual line. In addition, there is a problem that the elastic rib 12 swings and the locking piece 16 separates from the substrate 18, and the substrate 18 may come off a predetermined position.

[0006] A board mounting apparatus which attempts to solve this problem is disclosed in Japanese Utility Model Laid-Open No. 5-28086. In this board mounting apparatus, as shown in FIG.
A screw hole 20 is formed in the side plate 10b of the second member, and a hole 24 is formed in the cover 22 that covers the chassis 10, and a screw 26 is formed.
Is inserted through the hole 24 and screwed into the screw hole 20. Then, the screw 26 is tightened, and the end of the screw 26 is
So that it abuts. In this way, even when an impact is applied to the substrate mounting device, the elastic rib 12 is regulated so as not to swing, and the detachment of the substrate 18 is prevented. In addition, Japanese Utility Model Laid-Open No. 5-28086 discloses modifications of the substrate mounting device shown in FIG. 5, but all of them use screws 26 for fixing the elastic ribs 12.

However, in the board mounting apparatus shown in FIG. 5, although the purpose of securely fixing the board has been achieved, since the screws 26 are used to fix the elastic ribs 12, the board mounting apparatus may still be used. There remains a problem that the number of parts and the number of working steps are increased. That is, the cover 22
If the screw for fixing the elastic rib 12 is also used as the screw for fixing the elastic rib 12, the number of screws 26 does not increase, but the cover 22 should be fixed to the chassis 10 due to, for example, a problem of strength or the like. When the position of the screw is shifted from the position of the screw 26 for fixing the elastic rib 12, both the screw for fixing the cover 22 and the screw 26 for fixing the elastic rib 12 must be used. This leads to an increase in the number of parts.

When the dedicated screw 26 is used, the hole 24 and the screw hole 20 must be formed correspondingly, and the mounting work of the screw 26 increases. That is, it has been difficult for the conventional board mounting apparatus to achieve both reduction in the number of components and the number of work steps, and reliable fixing of the board.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a board mounting apparatus capable of reducing the number of parts and the number of working steps and capable of securely fixing a board. And

[0010]

SUMMARY OF THE INVENTION A substrate mounting apparatus according to the present invention includes a mounting portion on which a substrate is mounted and is entirely covered with a cover. An elastic locking piece to be attached while being mounted on the portion is provided, and the inner surface of the cover is in contact with the elastic locking piece to fix the elastic locking piece. Further, the elastic locking piece has a projection formed to contact the inner surface of the cover. The inner surface of the cover is formed with a convex portion that contacts the elastic locking piece. Further, a projection is formed on the side of the elastic locking piece that comes into contact with the inner surface of the cover, and a convex portion that is in contact with the projection of the elastic locking piece is formed on the inner surface of the cover.

[0011]

As shown in FIG. 2, the mounting piece 40 (FIG. 3) and the mounting column 4
1 to 47 are provided as appropriate, and the substrate 18 is mounted on the mounting pieces 40 and the mounting columns 41 to 47. Elastic ribs 12 are provided upright on the edge of the bottom plate 10 a of the chassis 10. Claw-shaped locking pieces 16 are formed at the end of the elastic rib 12, and these locking pieces 16 are opposed to each other.

A cover 22 that covers the board 18 is attached to the chassis 10. A projection 72 is formed on the surface of the elastic rib 12 opposite to the locking piece 16. The projection 72 comes into contact with the inner surface of the convex portion 74 of the cover 22, whereby the locking piece 16 is fixed so as not to come off the substrate 18 even when an impact is applied. Thus, detachment of the substrate 18 is prevented.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a substrate mounting apparatus according to the present invention.

FIG. 1 shows a video deck to which the board mounting apparatus according to the present invention is applied. The cabinet 30 of the video deck is a rectangular parallelepiped formed of the chassis 10 made of plastic and the cover 22 made of a thin metal plate. A front panel 10c and a rear panel 10d rising from front and rear ends thereof are provided on a bottom plate 10a of the chassis 10.
Is installed.

A cover 2 for covering components in the chassis 10
2 comprises a wide ceiling plate 22a and left and right side plates 22b bent downward from both side ends thereof. These side plates 22
A bent portion 32 is provided at the lower end of the portion b to be bent inward. The bent portion 32 is provided so as not to hurt the hand of the assembly worker.

As shown in FIG. 2, the bottom plate 1 of the chassis 10
Projected steps 34 are formed in the lower part of both side surfaces of Oa. The cover 22 is supported by the chassis 10 by the bent parts 32 abutting on these steps 34 respectively. The side plate 22b of the cover 22 is fixed to the chassis 10 by screws (not shown).

In order to support the ceiling plate 22a of the cover 22 in the middle, as shown in FIG. 3, near the left and right edges of the bottom plate 10a of the chassis 10, support walls 36 are erected one by one along the longitudinal direction. (Fig. 3). A metal girder 38 spans the rear end of the support wall 36. The girder 38 has an L-shaped cross section including an upper portion 38a and a side portion 38b bent downward from a side end of the upper portion 38a. At an appropriate position on the side portion 38b, a mounting piece 40 cut and raised therefrom and directed rearward is formed. The front end of the rectangular substrate 18 is mounted on these mounting pieces 40.

Behind the mounting piece 40, near the both ends of the bottom plate 10a of the chassis 10, a cylindrical mounting column 4 is provided.
1, 42 are erected. In this vicinity, mounting columns 43 to 47 having appropriate shapes are erected at appropriate positions. These mounting columns 41 to 47 are formed integrally with the chassis 10 by molding, have the same height, and the rear end of the substrate 18 is mounted on the mounting columns 41 to 47. .

The mounting columns 41, 4 on the left end side of the bottom plate 10a
Between them, higher positioning columns 48 protrude. The mounting columns 42, 4 on the right end side of the bottom plate 10a.
7, protruding positioning pillars 49 are provided. On the other hand, positioning holes 50 are formed in both corners on the rear end side of the substrate 18. The positioning of the substrate 18 is performed by fitting the positioning columns 48 and 49 into the positioning holes 50, respectively. The positioning columns 48 and 49 are also integrally formed with the chassis 10 by molding. The left mounting column 41, the positioning column 48, and the mounting column 43 are connected by plate-shaped ribs, and They are reinforcing each other. Similarly, the mounting column 42, the positioning column 49, the mounting column 47, and the mounting column 46 on the right side are also connected by plate-shaped ribs, and reinforce each other.

On both sides of the bottom plate 10a of the chassis 10, elastic ribs 12 are provided upright along the longitudinal direction. The elastic rib 12 is formed integrally with the chassis 10 by molding. Left elastic rib 12
Are formed with projecting portions 52 and 54 projecting upward. The projecting portion 5 projecting upward is also formed on the right elastic rib 12.
6, 58 are formed. These projections 52, 5
The upper ends of 4, 56 and 58 have the same height, and claw-shaped engaging pieces 16 each having a tapered surface on the upper part are formed here. These locking pieces 16 face the substrate 18 side.

The distance between the lower end surfaces of the locking pieces 16 and the upper end faces of the mounting pieces 40 and the mounting columns 41 to 47 is substantially the same as the thickness of the substrate 18. 16
Is hung on the substrate 18 to prevent the substrate 18 from moving up and down.

In order to mount the substrate 18 on the mounting piece 40 and the mounting columns 41 to 47 with the locking piece 16 as described above, the cover 22 (FIGS. 1 and 2) is removed. , Elastic rib 1
The two protrusions 52, 54, 56, 58 may be bent outward.

That is, first, the left end of the substrate 18 is inserted between the locking piece 16 of the protruding portions 52 and 54 and the mounting columns 41 and 43 while the positioning columns 48 are fitted into the left positioning holes 50. Thereafter, the substrate 18 is pushed to the left so that the projections 52, 54
When the substrate 18 is pressed down while bending outwardly, it comes into contact with and presses against the tapered surfaces of the locking pieces 16 of the right protrusions 56 and 58, so that the protrusions 56 and 58 bend outward.

Thus, the projections 52, 54, 56,
When the substrate 18 is further pressed down while the substrate 58 is bent outward, the right end of the substrate 18 contacts the upper ends of the mounting columns 42 and 47, and the right positioning column 49 is fitted into the positioning hole 50. Thus, the protrusions 52, 54, 56, 58 are released from the pressing force of the substrate 18, and the right protrusions 56, 58
Hangs on the substrate 18 so that the substrate 18 can be attached.

Here, it has been described that the substrate 18 is mounted with the left end of the substrate 18 as a fulcrum. On the contrary, the substrate 18 may be mounted with the right end of the substrate 18 as a fulcrum. Also, the removal of the substrate 18 from the protrusion 5
2, 54, or 56, 58 by flexing outward.

The left projections 52 and 54 have openings 6
0, 62 are formed, and openings 64, 66 are also formed in the right protrusions 56, 58. As a result, the weight is reduced, and the protrusions 52, 54, 56,
58 can be bent with a small force.

A hollow portion 67 having a U-shaped cross section is integrally connected to one of the left and right protruding portions 52, 56, whereby the protruding portions 52, 56 are reinforced. The remaining left projection 54 is connected to the mounting columns 41 and 43 by connecting portions 68 and 70, whereby the projection 54 and the mounting column 4 are connected.
1 and 43 reinforce each other.

As shown in FIG. 2, a vertically elongated projection 72 is formed on the outer surface of the projecting portion 52, 54, 56, 58 of the elastic rib 12, that is, on the surface opposite to the locking piece 16. I have. On the other hand, convex portions 74 curved in an arc shape are formed on both side plates 22b of the cover 22 by drawing. To attach the cover 22 to the chassis 10,
The cover 22 may be lowered from above with respect to the chassis 10 placed on a flat surface such as a floor, and the side plate 22b may be screwed. To remove the cover 22 from the chassis 10, the cover 22 may be lifted.

The convex portion 74 is convex toward the inside of the cover 22. The inner surface of the projection 74 is in contact with the projection 72. That is, the elastic ribs 12 on both sides are pressed by the convex portions 74 of the side plates 22b on both sides. As described above, the side plate 22b is fixed to the chassis 10 by screws (not shown).
, So that the chassis 10
Since the elastic ribs 12 do not bend outward even when a shock is applied to the base plate 18, the locking pieces 16 are fixed so as not to come off from the substrate 18, and the detachment of the substrate 18 is prevented.

As described above, since the convex portion 74 is formed by drawing, work hardening occurs. Further, the convex portion 74 is formed in an arc shape. Therefore, the convex portion 74 is stronger than other portions of the side plate 22b. By providing the convex portion 74 in this manner, the strength of the side plate 22b of the cover 22 is improved as compared with the case where the convex portion 74 is not provided, so that when the side plate 22b
It is possible to prevent the generation of an indentation due to the projection 72 on the b. This is particularly effective when the elastic rib 12 gives a strong impact to the convex portion 74 due to, for example, dropping the video deck.

Also, without providing the projection 74, the side plate 22b
May be brought into contact with the projection 72. In this case,
The side plate 22b may be closer to the elastic rib 12 than shown, or may be sized so that the protrusion 72 contacts the cover 22.

When the projection 74 is provided as in this embodiment, the side plate 22b other than the projection 74 can be separated from the projection 72 by the projection 74. Further, since the convex portion 74 is formed in an arc shape, the convex portion 74 can be smoothly slid with respect to the projection 72 without being caught by the projection 72.
Therefore, attachment and detachment of the cover 22 to and from the chassis 10 are facilitated.

In this embodiment, it is not necessary to use a dedicated screw or the like for fixing the substrate 18, and the number of components does not increase. Further, by integrally forming the elastic rib 12 and the mounting columns 41 to 47 on the chassis 10, it is possible to further prevent the number of components from increasing.

[0034]

As described above, the substrate mounting apparatus according to the present invention is a substrate mounting apparatus having a mounting portion on which a substrate is mounted and entirely covered with a cover. An elastic locking piece to be attached while being mounted on the mounting portion is provided, and the inner surface of the cover is abutted to fix the elastic locking piece. Further, the elastic locking piece has a projection formed to contact the inner surface of the cover. The inner surface of the cover is formed with a convex portion that contacts the elastic locking piece.
Further, a projection is formed on the side of the elastic locking piece that comes into contact with the inner surface of the cover, and a convex portion that is in contact with the projection of the elastic locking piece is formed on the inner surface of the cover.

Therefore, according to the present invention, since the elastic locking piece is fixed in contact with the inner surface of the cover, the elastic locking piece does not bend outward even when an impact is applied. It does not come off. Thus, the board can be securely fixed without using a screw dedicated to fixing the elastic locking piece. Therefore, it is possible to reduce the number of working steps and increase the reliability of fixing the board without increasing the number of components.

Further, by forming a convex portion on the inner surface of the cover and fixing the elastic locking piece with the convex portion, even when an impact is applied, the cover is prevented from being formed with an indentation due to the projection of the elastic locking piece. it can. Further, there is an effect that the work of attaching the cover is facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a video deck to which a board mounting device according to an embodiment is applied.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and is a cross-sectional view of the board mounting apparatus of the embodiment.

FIG. 3 is a perspective view of the board mounting device of the embodiment.

FIG. 4 is a cross-sectional view showing an example of a conventional substrate mounting device.

FIG. 5 is a cross-sectional view showing another example of a conventional board mounting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Chassis 10a Bottom plate 12 Elastic rib 16 Locking piece 22 Cover 22b Side plate 40 Mounting piece 41-47 Mounting column 72 Projection 74 Convex part

Claims (4)

(57) [Scope of request for utility model registration] 1. A substrate mounting apparatus having a mounting portion on which a substrate is mounted and covered entirely by a cover, wherein the substrate is locked and elastically mounted to be mounted on the mounting portion. A board mounting device, wherein a piece is provided, and an inner surface of the cover is in contact with the cover to fix the elastic locking piece. 2. The board mounting apparatus according to claim 1, wherein a projection is formed on the elastic locking piece so as to contact an inner surface of the cover. 3. The board mounting device according to claim 1, wherein a convex portion is formed on an inner surface of the cover to contact the elastic locking piece. 4. A projection is formed on a surface of the elastic locking piece that is in contact with the inner surface of the cover, and a projection that is in contact with the projection of the elastic locking piece is formed on an inner surface of the cover. The substrate mounting device according to claim 1, wherein