JPH02490Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device that utilizes the elasticity of a synthetic resin molded member to prevent loosening of an adjustment screw.

Conventional components to prevent adjustment screws from loosening include:
As shown in FIG. 1, by inserting a tension member 3 such as a taper spring or a compression coil spring between the head 1a of the adjustment screw 1 and the chassis 2, tension is applied in the direction in which the adjustment screw 1 is separated from the chassis 2. Alternatively, as shown in FIG. 2, the adjustment screw 1 is fixed by applying fixing means 4 such as a screw lock or adhesive to the contact portion between the adjustment screw 1 and the chassis 2.

However, the device shown in FIG. 1 has the disadvantage that the production cost is high due to the use of the tension member 3, and the space corresponding to the height of the tension member is wasted. The one shown in the figure has drawbacks such as being time-consuming to install and making readjustment difficult after the adjustment screw is fixed to the chassis.

SUMMARY OF THE INVENTION An object of the present invention is to provide an adjustment screw locking device that eliminates the above-mentioned drawbacks, is inexpensive to manufacture, and has a high locking effect.

The configuration of the present invention will be explained based on the embodiments and the drawings from FIG. 3 onwards.

Bearings and other parts are sometimes formed by outsert molding on the chassis 2 of audio equipment, etc., and this outsert molding is used to make a synthetic resin material that is engaged with the adjustment screw 1 under strong pressure. The block body 5 is molded into the chassis 2.

Adjustment screw 1 is screw hole 1 formed in chassis 2
0, the block body 5 is molded so as not to overlap the screw hole 10 and to have the rotating shaft portion 6 in a punch hole 9 provided near the screw hole 10.

This block body 5 is connected at its rear end (rotating shaft part 6 side) with a pin gate part of a runner in outsert molding, and when this block body 5 is rotated, the connecting part is torn and the rotating shaft part 6 is connected. Since the block body 5 can be rotated around the center, the block body 5 can be inserted into the screw hole 10.
The adjustment screw is configured to act as a locking member by rotating it toward the side. In addition, this block body 5 may be outsert molded alone,
Further, when a similar adjustment screw is arranged nearby, it may be formed so that it is connected to a block body for preventing loosening of the adjustment screw by a pin gate portion. Alternatively, if another member such as a bearing is arranged nearby, it may be connected to that member.

The block body 5 is intended to prevent the adjustment screw from loosening by engaging it with the adjustment screw 1 under strong pressure. A clamping hole 8 for clamping the split portion 7 and the adjustment screw 1 is formed, and the clamping hole 8 has a smaller diameter than the adjustment screw 1 and rotates the block body 5 toward the screw hole 10 side. The clamping hole portion 8 corresponds to the screw hole 10, and the body of the adjustment screw 1 screwed into the screw hole 10 is compressed by the elasticity of the slotted portion 7.

Figures 6 and 7 show the adjustment screw 1 of the block body 5.
This is another configuration example for engaging in a strong pressure state, in which the block body 5 is formed into a rod-shaped body, and a stopper 11 is provided protrudingly in the vicinity of the adjustment screw 1 by the above-mentioned outsert molding, and this block body 5 is adjusted. The screw 1 is configured so that its tip end is engaged with a stopper 11 in a curved state by being pressed against the side surface of the body of the screw 1.

Next, to describe the operation of the present invention, first, in order to outsert mold the block body 5, the block body 5 is
It is molded at a position away from the screw hole so that it does not overlap with the screw hole 10 of the chassis 2. This is screw hole 10
This is because if the block body 5 is molded in a position that overlaps with the screw hole, there is a risk that the screw hole will be filled with the protruding resin, and there is also the problem that the precision of the mold must be improved to prevent the resin from protruding.
Therefore, in the present invention, the block body 5 is formed in a position that does not overlap with the screw hole, and is configured to be rotated during use.

In the examples shown in FIGS. 3 to 5, the block body 5 is provided with a slotted portion 7, so when the adjustment screw is screwed in with great force, this slotted portion 7 expands slightly. After the adjustment is completed, the inner wall surface of the clamping hole 8 clamps the body of the adjustment screw due to the elasticity of the resin material of the block body and the elasticity of the slotted part. The adjustment screw is always held in a proper state by the clamping force of the clamping hole, and does not become loose.

The embodiments shown in FIGS. 6 and 7 do not have the slotted portion 7 and the clamping hole portion 8, but the block body 5 is bent by contacting the stopper 11, and its elasticity allows the adjustment screw to be tightened. This was an attempt to prevent the loosening of the

According to the adjustment screw loosening device of the present invention, it does not use a separate tension member as in the past, resulting in cost reduction, and since the adjustment screw is not completely fixed, it is difficult to adjust it properly. It is possible. The block body can be formed by outsert molding onto a chassis, and the desired loosening prevention effect can be achieved even if the precision of the outsert mold is rough or the positional precision of the outsert mold and the punched hole is rough. Furthermore, since the elasticity of the synthetic resin molded member is used to prevent loosening, it has excellent effects such as reducing the number of assembly steps.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views of a conventional locking member, FIGS. 3 to 7 show an embodiment of the locking device according to the present invention, and FIG. 3 is a plan view during outsert molding. , FIG. 4 is a plan view when in use, FIG. 5 is a longitudinal sectional view when in use, and FIGS. 6 and 7 are plan views of other embodiments. 1: Adjustment screw, 2: Chassis, 5: Block body, 6: Rotating shaft portion, 7: Slit portion, 8: Squeezing hole portion, 9: Punch hole, 10: Screw hole, 11: Stopper.

Claims (1)

[Scope of utility model registration request] A locking device for an adjustment screw, which is formed by outsert-molding a block made of synthetic resin on a chassis so as to engage under strong pressure with the adjustment screw screwed into a screw hole formed in the chassis. Make sure that the body does not overlap the screw hole.
Moreover, the adjustment is characterized in that it is formed to have a rotating shaft portion in a hole provided in the vicinity of the screw hole, and is configured to function as a locking member for the adjustment screw by rotating the block body. Screw locking device.