JPH034065Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a board case that houses a board for mounting electronic components such as a printed circuit board.

[Background technology]

For example, the case of the display/operation block that makes up the display and operation section of a control panel houses a board on which electronic components such as a printed circuit board are mounted. Conventionally, the board is fixed as shown in Figure 3. It had been. That is, a receiving protrusion 31 is formed on the inner surface of the operation/display case 30, a claw 32 is provided on the upper part of the receiving protrusion 31, and the board 33 is pushed in and supported by the receiving protrusion 31, and the claw 32 prevents it from coming off.

However, this board case has disadvantages in that the board 33 is difficult to remove during inspection, and the claws 32 are easily damaged.

Further, as other means, a screw structure is used, which results in poor workability, and a supporter structure increases the number of parts and costs.

[Purpose of invention]

The purpose of this invention is to provide a case for a board in which the board can be easily attached and removed and the claws are not damaged.

[Disclosure of invention]

This idea consists of a case body with an opening at the top, vertical protrusions formed on a pair of inner surfaces of the case body, and a board receiving surface protruding from the inner surface of the case body at a predetermined height. , an electronic component mounting board formed with a recess that engages with the vertical protrusion; a U-shaped fixing member that elastically hugs the vertical protrusion and presses the top surface of the board; and a U-shaped fixing member that closes the opening of the case body. and a panel that presses down the fixing member. Therefore, the board can be easily attached and detached by removing the panel and attaching and detaching the fixing member. Also, there are no claws, so there is no risk of damage caused by the claws.

An embodiment of this invention is shown in FIGS. 1 and 2. That is, the case body 1 has an opening 2 formed on the top surface, a rib 3 of a predetermined height rising from the bottom surface on one opposing surface of the inner surface, and the top surface is connected to the board receiving surface 4.
shall be. Further, ribs 5 reaching from the bottom surface to the opening 2 are formed on the same side surface to serve as vertical protrusions for supporting the substrate. The side surface of the rib 5 facing the center of the case is inclined, and the amount of protrusion from the inner surface of the rib 5 gradually increases from the opening side to the bottom side.

The substrate 6 has a size within the inner dimension of the case body 1, and has a recess 7 cut out corresponding to the rib 5. The concave portion 7 is engaged with the rib 5 and the substrate 6 is
When inserted into the case body 1, the board 6 is placed on the receiving surface 4.
It comes into contact with and is supported. Also, in this supported state, the recess 7
The distance X between the bottom edges of the ribs 5 and the distance Y between the opposing slopes of the ribs 5 at the same height are set to be XY.

The U-shaped fixing member 8 only needs to have pinching elasticity, but may be made of an insulating material that also has elasticity in the longitudinal direction, such as rubber or polyethylene. This U-shaped fixing member 8 is placed on the substrate 6 and elastically held by the ribs 5. The height (longitudinal direction) of the fixing member 8 is such that it reaches the opening 2 when attached to the rib 5.

The panel 9 closes the opening 2 of the case body 1 and holds down the fixing member 8.

Note that 10 is a display panel of the control panel.

With this configuration, when the opening 2 of the case body 1 is closed with the panel 9, the board 6 is held down via the fixing member 8, and the friction between the receiving surface 4, the bottom edge of the recess 7, and the inclined surface of the rib 5 is reduced. The direction c is fixed by the locking, and the directions a and b are also fixed by the engagement between the rib 5 and the recess 7. On the other hand, if the panel 9 is removed and the fixing member 8 is removed from the rib 5, the board 6 can be easily removed, and the board 6 can be easily attached and detached.

Further, there is no claw 32 as in the conventional example, and the case body 1 and the board 6 are not damaged. Further, although the fixing member 8 is required, the number of parts is relatively small and the cost can be reduced. Furthermore, since it is composed of ribs 3 and 5, the structure of the case body 1 is simple and the cost of the mold etc. can be reduced. If the fixing member 8 is made of a material that is elastic in the longitudinal direction, such as rubber, vibrations and shocks can be absorbed.

Note that the display panel 10 may be provided with a rib that presses the substrate 6, but since this rib protrudes from the panel 10, it is easily damaged during assembly work, is problematic for parts inventory, and has no impact absorption effect. In this respect, it is inferior to this embodiment.

[Effect of idea]

As described above, according to the circuit board case of this invention, the panel and the fixing member are held against the ribs to hold the circuit board, so it is easy to attach and detach the circuit board, and it is less likely to be damaged compared to a case with claws. The number of parts is relatively small and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of this invention, FIG. 2 is an exploded perspective view, and FIG. 3 is an exploded perspective view of a conventional example. 1... Case body, 2... Opening, 4... Receiving surface, 5... Rib (vertical protrusion), 6... Board, 7...
Recessed portion, 8...fixing member, 9...panel.

Claims (1)

[Scope of utility model registration request] a case body with an open top surface; a vertical protrusion formed on a pair of inner surfaces of the case body; a board receiving surface protruding from the inner surface of the case body at a predetermined height; an electronic component mounting board formed with a recess that engages with the strip; a U-shaped fixing member that elastically hugs the vertical protrusion and presses the top surface of the board; and a U-shaped fixing member that closes the opening of the case body and A board case that includes a panel that holds down a fixing member.