JPS6012315Y2 - Board mounting device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a circuit board mounting device, and more particularly, to a mounting device for a printed circuit board and a chassis.

To attach the board to the chassis, the most common method is to insert screws into small holes pre-formed in the chassis and tighten them with a screwdriver, but the precision of positioning the small holes and the screw holes on the chassis side is required In addition, the operator needs a screwdriver, and the load applied to the board is borne by the screws, which can cause cracks in the board around the small hole or, in extreme cases, damage. was there.

Therefore, this idea allows the mounting of the board to the chassis without using any tools, and also eliminates the risk of damage as the mounted board is surface supported instead of point supported as is the case with screws. For this purpose, a mounting groove is formed in the chassis into which the edge of the board is inserted, the edge of the board is inserted into this mounting groove, and a fixing cap is fitted into the open end of the mounting groove. This feature is characterized in that the board is installed while preventing the board from coming off.

The details of this invention will be explained below with reference to the attached drawings.

In the figure, reference numeral 10 indicates a board on which electronic components are attached. This board 10 is attached to the chassis 20, and the attached state is held by a fixing cap 30.

The board unit 10 has mounting edges 11 on both side edges, and the upper edge of the mounting edges 11 in the drawing has a stepped portion 11a that is lower in height than the entire board unit 10.

The chassis 20 has a box shape surrounded by side plates,
Projections 22 having a T-shaped cross section are formed at predetermined intervals on the inside of a pair of side plates 21 that face each other, and both sides of the projections 22 form mounting grooves for the fixed cap 30 .
3 is formed.

In addition, on the end surface of the protrusion 22 that is inside the chassis 20,
Mounting frames 25 forming mounting grooves 24 for inserting and fitting the edge of the board 10 are formed at intervals, and a mounting frame 26 is also formed on the bottom surface of the chassis 20 in continuation with the mounting frames 25. A mounting groove 27 is formed.

Locking teeth 28 are formed on the sides of the pair of mounting frames 25 opposite to the grooves, and there is no locking resistance in the direction in which the fixed cap 30 is attached. It's getting lower.

Further, the fixing cap 30 for fixing the board 10 to the chassis 20 can maintain an engaged state with the protrusion 22 of the chassis 20, and has a rectangular shape as a whole. A pair of mounting protrusions 31 to be mounted in the mounting grooves 23 of the cap 30 are formed on one side surface of the cap 30 so as to face each other.

On the inside of the side plates 32 adjacent to the mounting protrusion 31, there are locking plates 33 connected by elastic pieces 32a, and on the inside of these locking plates 33, the locking teeth 28 can be locked. ,
Locking teeth 34 with no locking resistance are formed in the locking direction of the fixed cap 30.

There is a space between these locking teeth 34, 34, and the mounting edge 1 of the board 10 is located inside the top plate 35 of the fixed cap 30.
A recess 1*35a into which the fixing cap 30 is inserted is formed, and the fixing cap 30 is attached so as to straddle the substrate 10.

Next, a description will be given of a board mounting operation using the board mounting apparatus of this invention.

First, the mounting edge 11 of the board 10 is fitted into the mounting groove 24 provided on the chassis 20, and the board 10 is pushed in sufficiently so that one side of the board 10 is also fitted into the mounting groove 27 on the bottom surface of the chassis 20. Attachment protrusion 3 of fixing cap 30 to 23
1 of the fixed cap 30 so that the locking tooth 3 of the fixed cap 30 is attached.
It is attached with the 4th side facing the board 10.

The mounting protrusion 31 fits into the mounting groove 23, and the locking plate 33 is expanded by the locking teeth 28 formed on the mounting frame 25, so that the locking teeth 28 of the mounting frame 25 are positioned in the space between the locking teeth 34. do.

The locking teeth 34 of the fixed cap 30 have no resistance in the direction in which the cap is pushed in, but in the direction in which the fixed cap 30 is removed, they mesh with the locking teeth 28 and cannot move, resulting in a locked state. When the fixing cap 30 is fully pushed in, the mounting edge 11 of the board 10 fits into the groove 35a.
The substrate 10 is completely fixed.

In the above description, only one side of the board 10 has been illustrated and explained, but the other side of the board may be similarly fixed, or may be fixed simply by the mounting groove 24 provided in the chassis 20.

In addition, although the above example has shown an example in which the locking teeth 28 are formed on the side surface of the mounting frame 25 that forms the mounting groove 24, the locking teeth 28 are formed directly on the surface of the protrusion 22 of the mounting groove 24. It may be formed on both sides of the opening of the mounting groove 24 (see Figures 4 and below); in this case, the fixing cap 30 is one in which one locking tooth 34 is provided at the end of the elastic piece 32a (see Figure 5). , (Figure 6).

In the above explanation, the protrusions 22,
Although the mounting frame 25 is shown as integrally formed, the protrusion 2
2. The mounting frame 25 may be molded separately and fixed by adhesive, screws, etc.

As is clear from the above description, according to the board mounting device of this invention, both side edges of the board are fitted into the mounting grooves provided in the chassis, and locking teeth are provided on the open end side of the mounting grooves. Since the open end of the mounting groove is closed with a fixed cap that has locking teeth that mesh with this, there is no need for positioning work or tools for mounting the board, making it efficient and reliable. Get the board installed.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view of the board mounting device according to this invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a partial perspective view showing another embodiment, and FIG. 4 is an exploded perspective view of the same. 5 is a cross-sectional view taken along the line ■--■ in FIG. 4, and FIG. 6 is a plan view of FIG. 5. 10... Board, 11... Mounting edge, ll
a...Step part, 20...Chassis, 21
...Side plate, 22...Protrusion, 23...
... Mounting groove, 24, 27... Mounting groove, 25.
26... Mounting frame, 28... Locking teeth, 3
0... Fixed cap, 31... Mounting protrusion, 32... Side plate, 32a... Elastic piece, 33... Attachment plate , 34...locking teeth,
35...Top plate, 35a...Concave groove.

Claims (1)

[Scope of utility model registration request] A board unit for mounting electronic components, a chassis having a mounting groove into which the edge of the board unit can be inserted and at least one edge of the chassis is open, and a fixing cap that closes the open end of the mounting groove of the chassis. and the board unit has an edge that can be inserted into the mounting groove,
The chassis has a mounting groove for a fixed cap parallel to the mounting groove, and locking teeth formed on both sides of the mounting groove, and the fixed cap has a fitting protrusion that can be fitted into the mounting groove, and a locking tooth on the locking teeth. What is claimed is: 1. A board mounting device comprising locking fixed teeth that can be locked, and configured to mount a board unit inserted into a mounting groove with a fixing cap that closes an open end of the mounting groove.