JPS5843829Y2 - Printed circuit board removal prevention mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed circuit board removal prevention mechanism that prevents a plurality of printed circuit boards inserted and fixed by a connector or the like from being removed from the connector due to vibration or the like.

Conventionally, printed circuit boards are fixed by fixing L-shaped metal fittings with screws from the direction in which the printed circuit board is inserted, as shown in Figure 1, and by fixing the surface cover of the printed circuit board storage case, as shown in Figure 2. Depending on the method, a method that also serves as a method for fixing the printed circuit board, or a metal fitting with a bulge at the tip at the bottom of each printed circuit board as shown in Fig. 3, and a U-shaped leaf spring on the side of the receiver, can be used to secure the printed circuit board. There was a method in which the board was fixed using the holding force of a leaf spring by inserting it, but the inconvenience of attaching and removing the printed circuit board and the weak holding force made it unsuitable.

The purpose of the present invention is to provide a mechanism for preventing the removal of commercially available odor-prone printed circuit boards, which eliminates the inconvenience of attachment and detachment as described above, and uses gravity applied to the components to easily and reliably apply a holding force. It is to be.

Next, the present invention will be described in detail with reference to the drawings showing an embodiment of the present invention.

A side view of an embodiment of the present invention is shown in FIG. 4, and a partial view thereof is shown in FIG. 5.

To describe its configuration in FIG.
1, there is a deep groove 10 in the lower front of the case 100 to be stored.
4 is provided with approximately the same length as the width of the case 100.

In FIG. 5, a square bar 2 having a trapezoidal shape with approximately the same length as the deep groove 1 and having a certain clearance with the deep groove 1 is dropped into the deep groove 1.

A screw hole 3 is provided in the bottom of the deep groove 1 by inserting a knob screw 5 having a manually operable lock nut 4 upward from the bottom of the deep groove 1 into the screw hole 3, and rotating the knob screw 5. The knob screw 5 moves to the top and pushes up the square bar 2.

A commercially available insertion/extraction tool 8 that performs an insertion/extraction operation on the printed circuit board 6 by rotating with a fulcrum 7 at the end of the printed circuit board 6 is caught between the slope 2a of the square bar 2 and the side surface 1a of the deep groove 1, and cannot rotate. 6 is fixed, and by tightening the lock nut 4, the knob screw 5 is fixed more securely.

Furthermore, to release the fixation of the printed circuit board 6, loosen the lock nut 4, rotate the knob screw 5, and lower it downward.The square bar 2 will then fall in the direction of gravity and separate from the insertion/extraction tool 8, allowing the insertion/extraction tool 8 to rotate freely. I can do it.

By inserting and attaching a C-shaped retaining ring 9 to the tip of the knob screw 5, the knob screw 5 and lock nut 4 are prevented from falling from the screw hole 3 provided in the deep groove 1, and the printed circuit board 6 can be fixed and released. It is clear that the operation is smoother.

That is, according to the invention, by applying force from below upward to fix the conventionally commercially available insertion/extraction tool, the printer I/board can be securely fixed with simple parts and simple movements, and,
When released, the fixing device is lowered in the direction of gravity, thereby providing a mechanism to prevent the printed circuit board from being removed, which facilitates the function of attaching and detaching the printed circuit board.

As clarified in the above embodiments, if the present invention has a deep groove, the function of preventing the printed circuit board from being pulled out can be provided at low cost by combining a square bar, a knob screw, and a lock nut.

The one shown in FIG. 5 shows one embodiment, and the knob screw/lock nut may be a combination of a commercially available screw/nut as shown in FIG. 6, or a combination of a commercially available screw/nut as shown in FIG. It is also possible to use a combination of screws, washers, and spring washers.

Furthermore, it is clear from this embodiment that the present invention can be applied to a single printed circuit board.

[Brief explanation of drawings]

Figures 1, 2, and 3 are views showing the conventional printer I/board removal stopper, Figure 4 is a side sectional view of the Phnont board storage case of the embodiment of the present invention, and Figure 5 is the The lower part of Figure 4 is a detailed side sectional view of the printed circuit board removal prevention mechanism, Figure 6 is a second embodiment of the present invention, and is a diagram showing an example in which commercially available screws and nuts are used as separate knob screws. The figure also shows commercially available screws,
The figure which shows the third Example of this invention which uses a washer and a spring washer.

Claims (1)

[Scope of utility model registration request] A case for storing a printed circuit board with an insertion/extraction tool, which is equipped with a trapezoidal rectangular bar that is movable up and down and installed at the lower front of the case, and a means for pushing up and fixing the square rod from the bottom of the case with a screw. A printed circuit board removal prevention mechanism characterized by fixing the printed circuit board by preventing the removal operation.