JPH0346555Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanism for preventing a substrate such as a printed circuit board from coming off, which is plug-in mounted to a connector of a communication device, an electronic device, or the like.

The conventional retaining mechanism, as shown in Figure 1,
A lock bar 3 having a protrusion 4 for preventing the printed circuit board from coming off, a rail 1 having a groove 2 in which the lock bar 3 slides, and an oblong hole 7 at a position corresponding to the hole 5 provided at one end of the lock bar 3. a holding part 6 for holding one end of the lock bar 3;
a step-shaped hole 1 engaging with a hole 7 of said holding part 6;
1 and attached to the holding part 6;
It consists of a pin 9 that is inserted into a hole in the lock bar 3 through the holes 11 and 7, and a screw 14 that fixes the holding part 6 to the housing 15. When the knob 12 of the lever 10 is pulled in the direction of the arrow C, the lock bar 3 moves in the direction of the arrow D by a length corresponding to the major axis of the hole 7 in response, and the printed circuit board 16 is ready to be inserted. After inserting the printed circuit board, when the knob 12 is pushed in the direction of arrow B, the lock bar 3 moves in the direction of arrow A, and the protrusion 4 reaches the position of the notch 16a of the printed circuit board 16, so that the It is possible to prevent the board 16 from coming off in the direction of arrow E.

However, such a conventional slip-off prevention mechanism has a disadvantage in that it requires a large number of parts and requires a large number of man-hours to assemble because it requires troublesome work such as press-fitting of pins.

The object of the present invention is to provide a retaining mechanism that eliminates the above-mentioned drawbacks.

The retaining mechanism of the present invention includes a plurality of notches provided corresponding to mounting intervals of the plurality of boards;
A lock bar having a hole of a predetermined size and an L-shaped cross section, an L-shaped groove for slidably holding the lock bar, and a protrusion formed on one wall forming the L-shaped groove. a holding part having a slit with one end open and having grooves on the upper and lower surfaces, each groove having a recess that engages with the protrusion, and a protrusion on the rear surface that engages with the hole formed in the lock bar. and a block that slides on the lock bar.

Next, the present invention will be explained in detail with reference to the drawings. FIG. 2 is a perspective view showing an embodiment of the present invention;
Fig. 3 is an exploded enlarged view of a part of Fig. 2, Fig. 4 is a sectional view taken along line C-C in Fig. 2, and Fig. 5 is a sectional view taken along line D-D in Fig. 3.
The sectional views, FIGS. 6a and 6b, are sectional views taken along line E--E in FIG.

This embodiment includes a lock bar 20 having an L-shaped cross section with a plurality of notches 18 for inserting a plurality of printed circuit boards 17 and a hole 19 at one end, and a lock bar 20 for slidably holding the L-shaped lock bar 20. L-shaped groove 21
a holding part 24 having a slit 23 with one end open and having protrusions 22a and 22b formed on one wall surface constituting the L-shaped groove 21; and a groove 25 having grooves 25a and 25b on the upper and lower surfaces, respectively.
The block 28 has recesses 26a and 26b that can be engaged with the protrusions 22a and 22b, respectively, and a protrusion 27 that fits into the hole 19 of the L-shaped lock bar 20 on the rear surface.

To assemble the block 28, insert the block 28 into the slit 23 of the holding part 24 through the grooves 25a and 25b, and then insert the holding part 24 into the side plate of the housing through the screw hole 31 and screw 30 formed in the holding part 24. 29
This is completed by attaching the cover 32 that covers the upper part of the L-shaped lock bar 20 to the side plate 29b. The cover 32 is constructed so as not to prevent lateral movement of the L-shaped lock bar 20. In this way, assembly is very easy.

Next, the operation of inserting and removing the board will be explained with reference to FIGS. 6a and 6b.

At the time of insertion, first, the block 28 is moved to engage the recess 26b and the protrusion 22a. At this time, the L-shaped lock bar 20, which is engaged with the protrusion 27 provided on the rear surface of the block 28 through the hole 19, also moves together. In this state, the board 17 is inserted into the housing through the notch 18, as shown in FIG. 6a. Next, when the block 28 is moved in the direction of arrow A until the recess 26a is engaged with the protrusion 22a and the protrusion 22b of the recess 26b, the sixth block 28 is moved.
As shown in Figure b, the position of the notch 18 also moves. As a result, the board 17 is prevented from coming off by the lock bar 20.
This is prevented by a portion other than the notch 18 on the side surface of the .

Further, the board 17 can be removed by the reverse operation to the above-described operation, that is, by moving the block 28 in the direction of arrow B from the state shown in FIG. 6b to the state shown in FIG. 6a. Ru.

The holding part 24 and the block 28 are made of materials that have a certain degree of elasticity so that the protrusions 22a and 22b and the parts of the block 28 other than the recesses 26a and 26b can move the block 17. .

As described above, the present invention has the effect of reducing the number of parts and assembly man-hours.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a conventional retaining mechanism, FIG. 2 is a perspective view showing an embodiment of the present invention, FIG. 3 is an exploded perspective view of a portion of FIG. FIG. 5 is a sectional view taken along line CC in FIG. 3, FIG. 5 is a sectional view taken along line DD in FIG. 3, and FIGS. In the figure, 1...Rail, 2...Groove, 3...
Lock bar, 4... protrusion, 5... hole, 6... holding part, 7... hole, 9... press-fit pin, 10... lever, 11... hole, 12... knob, 14... screw, 15... Frame, 16... Board, 1
7... Board, 18... Notch, 19... Hole, 20
...L-shaped lock bar, 21...L-shaped groove, 22a,
22b...Protrusion, 23...Slit, 24...Holding component, 25a, 25b...Concave groove, 26a, 26
b... recess, 27... protrusion, 28... block, 29a, 29b... side plate, 30... screw,
31...screw hole, 32...cover.

Claims (1)

[Claims for Utility Model Registration] A board slip-off prevention mechanism for preventing a board from coming off from a housing in which a plurality of boards are mounted in parallel, comprising first and second surfaces orthogonal to each other,
a plurality of cutouts for inserting and removing the boards corresponding to the mounting positions of the plurality of boards on the first surface, and a plurality of notches of a predetermined size provided at one end of the first surface. A holding part comprising a lock bar having a hole, an L-shaped groove for slidably holding the lock bar, and a slit with one end open and having a protrusion formed in one wall forming the L-shaped groove; a first, a second, and a third set of opposing surfaces, and each of the faces forming the first set of opposing surfaces has first and second grooves corresponding to the slits of the holding component. and the first
and a surface having a recess corresponding to the protrusion of the slit in at least one of the second grooves, and forming a set of the second opposing surfaces parallel to the length direction of the first and second grooves. and a lock bar sliding block having a protrusion on one side thereof that fits into a hole provided in the lock bar.