JPH0121203Y2 - - Google Patents

Description

[Detailed description of the invention] This invention involves inserting the mounting hole in one of the two plates from the front side and locking it in a penetrating manner, and the part protruding from the back side of the plate to the other plate. The holes opened in the hole or the edges of the plates are latched to join the plates in a tangential manner, while the surface side of the overlying plate is operated to release the latching to the lower plate and undo the bond. The present invention relates to a latch for joining plates made of synthetic resin, and in particular, the present invention has two engaging claw means protruding from the rear side of the upper plate and provided in steps along the length direction. The object of the present invention is to provide an improved connecting latch that can accommodate changes in the thickness of the underlying plate.

Regarding the latch that allows these plates to be joined together and released, the application was made in 1983.
29560 (Utility Model Application Publication No. 58-133608), the present invention improves the latch related to this already proposed latch to ensure stable engagement even when the thickness of the underlying plate changes. The object of the present invention is to provide an improved latch for achieving the desired condition.

Below, this invention will be explained based on the illustrated embodiment. Reference numeral 1 denotes a latch according to the invention molded from synthetic resin, which includes a plate part 2 having a U-shape in plan view, and a latch erected from the three outer edges of this plate part. a head portion 4 consisting of a wall 3, a shaft portion 5 having a U-shaped cross section projecting downward from the three inner edges of the plate portion, and an opposing side wall 5 of this shaft portion.
It has a locking leg portion 7 consisting of non-return claws 6, 6 that stand diagonally upward from the lower edge portions of a and 5a.

The locking leg portion 7 is hollow, and the opposite side wall 5
a, 5a, and a connecting wall 5b that connects both side walls surrounds this hollow part. And the hollow part is the connecting wall 5
It is open on the surface facing b, and extends upward at the inner edge of the plate portion 2.

The connecting wall 5b extends downward almost straight beyond the position where the non-return claws 6, 6 on both side walls are grown, and ends, and the opposing side walls 5a, 5a are connecting walls extending downward from the position where the non-return claw 6 grows. 5b so as to end at the lower end of the connecting wall 5b. Further, from the lower end of the connecting wall 5b, an operating arm 9 having a width such that it can fit into the opposing gap between the opposing side walls 5a, 5a is integrally connected via a thin hinge portion 8.

The operating arm 9 has a plate shape, and has a length such that its free end passes between the inner edges of the U-shape of the plate part 2 and protrudes above the upper surface thereof when the operating arm 9 is folded back about the hinge part as a fulcrum and stands upright. An engaging pawl 10 is provided in the middle of the length of the outer surface.
A knob 11 is provided at the free end, and a penetrating window 12 is provided between the engaging claw 10 and the free end, more precisely, directly above the protruding position of the engaging claw 10. is provided.

This operating arm 9 is attached to the connecting wall 5 as shown in FIGS.
It is molded integrally with the locking leg part 7 so as to hang directly below from the lower end of b, and is folded back at a thin hinge part 8 to face the connecting wall so that the knob part 11 faces the head. The knob part 11 is adapted to pass through the U-shaped open part of the plate part 2 and ride on the upper surface.

In the figure, reference numeral 13 denotes a biasing spring piece extending from the side surface of the connecting wall 5b of the locking leg portion 7 toward the inside of the hollow portion;
1 is an engaging spring piece which is an auxiliary engaging means and is provided between two biasing spring pieces, extends in the same shape, and has an auxiliary engaging pawl 15 at its distal end to provide spring properties.

As shown in FIG. 2, the biasing spring piece 13 and the engaging spring piece 14 are derived from a position close to the lower end of the connecting wall 5b and extend diagonally upward, and are attached to the opposite side walls 5a, 5a.
The distal end portions, that is, the free end portions of the operating arms 9 are brought into contact with the inner surface of the operating arm 9 which is folded back and erected using the hinge portion 8 as a fulcrum in the hollow portion surrounded by the engaging spring pieces. 14 is an auxiliary engaging claw 15 at the tip of the operating arm 9 through the opened window 12.
It protrudes from the outer side of the engagement claw 10 and faces directly above the engagement claw 10.

One efficient method for forming the latch according to the present invention is as described above.
It is assembled into a ready-to-use state by integrally molding it in a hanging position, and then raising the operating arm with the hinge part 8 as the turning point.

The use of this latch will be explained next. When two plates are fixed in contact with each other, one of the plates, for example the cover plate 16, is allowed to pass through the locking leg 7 by deflating the check pawl 6. A mounting hole 17 is opened, and the locking leg portion is pushed into this hole from the front side to perform mounting.

At this time, as the locking leg is inserted, the operating arm 9 is pressed by the edge of the mounting hole 17 and pushed into the hollow part of the leg 7 while bending the biasing spring piece 13 and the engagement spring piece 14, and the outer surface of the operating arm 9 is pressed. The engaging claw 10 and the auxiliary engaging claw 15 are moved back to pass through the hole. Then, the non-return claw 6 provided on the leg after this passage is bent by the edge and pulled out to the back side, and when restored, the head 4 comes into contact with the surface of the cover plate to engage with the edge of the hole. They are jointly fixed to the lid plate.

On the other hand, the entire locking leg 7 including the check claw 6 is passed through the other plate facing the lid plate 16, for example, a plate 18 such as a cabinet. The engaging claws 10, 1 of the operating arm 9
5 is an engagement hole with an opening edge that does not allow passage through, or one side edge 1 of the plate portion 18.
9 facing the same position as the edge of the opening and facing the latch attached to the lid plate.

The latch attached to the cover plate 16 approaches the plate part 18 as the cover plate is closed, and the engaging pawl 10 provided on the operating arm 9 is inserted into the opening provided therein or at one side edge 19.
The operating arm 9 is pushed through the hollow part of the leg part against the biasing spring 13 and the engaging spring 14 in a rubbing manner. After passing, the operating arm 9 is restored by the restoring force of the hinge part 8 and the repulsion of the spring piece, and the engaging claw 10 and the auxiliary engaging claw 15 protruding outward are engaged with the one side edge 19 of the plate part. The cover plate 16 is connected to the plate part 18.
It will be fixed and occluded in contact with the surface of the

6 and 7 of the drawings, the latch of the present invention attached to the lid plate is pressed against the plate part 18, and the engaging claw 10 or the auxiliary engaging claw 1 provided on the operating arm 9 is shown.
5 is latched and closed, and FIG.
FIG. 7 shows a state in which the plate portion 18 is thick and the engaging pawl 10 is directly engaged with the one edge portion 19.

As shown here, when the thickness of the plate part is thin, when the operating arm faces one side edge 19 of the plate part 18 by pressing the latch, the engaging claw 10 first slides together to close the hollow part of the leg. At the same time, the engagement spring piece 14 is pushed in, and the auxiliary engagement claw 15 is retreated. and,
After the one side edge 19 passes the engaging claw 10, the operation arm is released, and only the auxiliary engaging claw 15 is pushed in, and then when the side edge 19 passes the position of the auxiliary engaging claw 15, The retraction of this is released, and the auxiliary engaging claw 15 is engaged with one side edge to be fixed (FIG. 6).

On the other hand, when the thickness of the plate part is large, the engagement claw 10 passes through the one side edge 19 and is restored to its original state, where it engages and a closed state is obtained, and the auxiliary engagement claw 15 protrudes from the window 12. is left in abutment against the edge of the plate and retracted.

In this way, the latch of the present invention can be engaged with plate parts of different thicknesses to fix the cover plate 16 in a closed state. When the operating arm is moved toward the locking leg against the spring pieces 13 and 14, the protruding engagement claws 10 and 15 move back and come off, allowing them to be separated from the plate.

As described above, the latch of the present invention has two independent locking means: the non-return pawl 6 provided on the locking leg 7 and the engaging pawl 10 provided on the operating arm 9 movable via the hinge portion 8. Therefore, the two plates to be connected are individually engaged, and one is fixedly engaged and the other is detachably engaged by the operation of the operating arm, so that the plates can be engaged and detached from each other without coming off from one of the plates. They can be combined freely, and the operation at the time of engagement is simply pressing.
The release operation can be performed by operating a knob on the front side of the plate, making it extremely convenient to handle.

In particular, the latch of the present invention has two independent engagement means, the engagement claw 10 and the auxiliary engagement claw, which are released by the operating arm, even if the thickness of the overlapping lower plates changes. 15, it is possible to selectively engage these elements to always obtain a stable engagement state without rattling.

In the embodiment described above, the two engaging claws are provided in two stages to obtain two engagement points, but the window 12 provided on the operating arm is made vertically elongated so that the length of the auxiliary engaging claw 15 is different. By projecting a plurality of engagement spring pieces 14 at different positions to the outer surface of the operating arm through this window 12, it is possible to increase the engagement points, and it is also possible to accommodate different plate thicknesses. becomes possible.

Of course, in practice, if the upper surface of each engaging pawl is sloped as shown in the figure to form the inclined surfaces 10' and 15', it will be easier to bite the edge or one side edge of the engaging hole of the lower plate. This is convenient because it is effective in preventing rattling, and at the same time, the range corresponding to the slope is widened to accommodate changes in plate thickness.

[Brief explanation of drawings]

The drawing shows one embodiment of the present invention.
The figure is an enlarged perspective view, FIG. 2 is a front view of the operation piece in the unfolded state with the operating piece hanging below the locking leg, FIG. 3 is a side view, and FIG. 5
The figure is a sectional view taken along the line shown in Fig. 2, Fig. 6 is an enlarged sectional view showing the engagement state when the lower plate is thin, and Fig. 7 is an enlarged sectional view showing the engagement state when the lower plate is thick. It is an enlarged sectional view showing a state where it engaged directly with a pair of claws. 4... Head, 6... Non-return claw, 7... Locking leg,
8...Hinge portion, 9...Operating arm, 10...Engagement claw, 11...Knob portion, 12...Window, 13...Biasing spring, 14...Engagement spring piece serving as auxiliary engagement means, 1
5...Auxiliary engagement claw.

Claims (1)

[Scope of utility model registration request] A non-return claw means that hangs down from the lower surface of the head and deforms when pushed into a mounting hole provided in a plate such as a lid plate, passes through the hole, and holds the plate between the head and the lower surface of the head. a locking leg provided with a locking leg, and a knob that is connected to the leg end of the locking leg via a thin hinge section, is folded back along the side of the locking leg using the hinge section as a fulcrum, and is provided at the free end. The part protrudes upward from one side edge of the head and engages with an opening or edge formed in a plate of a cabinet or the like to which the lower surface of the plate such as the cover plate is brought into contact with the outer surface and fixed. An operating arm provided with an engaging claw, and an auxiliary engaging claw extending from the side surface of the locking leg toward the operating arm and provided at its free end through a window provided above the engaging claw of the operating arm. A latch for connecting plates, comprising an auxiliary engagement means that projects freely in and out of the outer surface of the operating arm.