JPH0637508Y2 - Drawer opening / closing mechanism - Google Patents

Description

The present invention relates to a drawer opening / closing mechanism, and more particularly to a drawer opening / closing mechanism including a drawer stop member.

[Prior Art] Japanese Patent Application No. 59-
There is something like that shown in No. 252409.

The drawer opening / closing mechanism has a drawer 23 slidably arranged in a drawer housing 21 as shown in FIGS.

That is, the bearing provided on the inner surface of the drawer storage section 21.
The rail 22 is engaged with a rail 24 provided on the outer surface of the drawer 23 and is slid.

Then, the protruding portion 25, which is a stop member for stopping the drawer 23 on the way to reach the maximum open position of the drawer 23, is pulled out.
It is provided on the outer surface of the
It was supposed to stop at an intermediate position by inserting 22.

[Problems to be Solved by the Invention] In the above-described conventional drawer opening / closing mechanism, if the distance between the inner surface of the drawer housing portion 21 and the outer surface of the drawer 23 is increased, the load on the bearing 22 is increased and the external dimensions are increased. Is disadvantageous in terms of reliability and ease of use, and as a result, as shown in FIG. 3, the size and shape of the convex portion 25 that stops the drawer 23 while reaching the maximum open position is restricted. Therefore, in order for the convex portion 25 to exert its function, an excessive load (bending stress) is generated at the root 31 of the convex portion. As a result, there is a drawback in that the fatigue life of the convex portion 25 is significantly shorter than that of other mechanical members.

[Means for Solving the Problems] The present invention has been made to solve the above problems. As a means for solving the problems, an opening / closing mechanism of a drawer according to the present invention includes a rail provided on an inner surface of a drawer storage portion and the drawer. A bearing that slides on the surface of the rail on the outer surface of the drawer that slides on the inner surface of the storage portion, and a drawer stop member that abuts the bearing provided at a predetermined position of the rail, and the stop member is the It is configured to be rotatably mounted on the surface opposite to the inner surface of the drawer housing portion and to be projected and urged toward the rail side from a hole formed on the inner surface of the drawer housing portion via a spring.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional plan view showing an opening / closing mechanism of a drawer according to an embodiment of the present invention.

In the figure, reference numeral 11 denotes a drawer housing portion, and a drawer 13 is housed in the drawer housing portion 11.

That is, the rail 12 is provided on the inner surface of the drawer housing portion 11, the bearing 14 is attached to the outer surface of the drawer 13, and the drawer 13 slides by sliding inside the rail 12. A drive mechanism 16 with a coil spring 16a of the drawer 13 and a locking mechanism 17 are provided inside the drawer housing portion 11 and inside the drawer 13.

A drawer that abuts the bearing 14 at the center of the rail 12.
Stop members 15 of 13 are provided to apply a resistance force to smooth sliding of the drawer 13 due to rolling of the bearing 14.

This stop member 15 is provided on the surface opposite to the inner surface of the drawer housing portion 11, and cuts out a part of the rail 12 provided on the inner surface of the drawer housing portion 11, where the biasing force of the coil spring 15b moderately acts. Load is applied to the rail 12
It is supported by a rotating shaft 15a so that it can come in and out from the surface of the. In order for the bearing 14 attached to the outer surface of the drawer 13 to pass, the stop member 15 is pushed in from the surface of the rail 12, and a load is generated on the coil spring 15b, but the wire diameter, winding diameter, It is possible to withstand this load by appropriately determining the number of turns.

Further, unlike the prior art cited above, there is no need to provide a mechanism in a narrow space such as the inner space of the drawer housing and the clearance between the drawers, so the geometrical restrictions of the coil spring are reduced, and a mechanism with a long life against fatigue fracture is realized. be able to.

A bearing 18 is also provided on the inner surface of the drawer housing portion of the main body 11 to help the drawer 13 slide smoothly.

In the closed state of the drawer 13, when the locking mechanism 17 is released, the drawer 13 slides the bearing 14 onto the rail 12 and is pushed out by the restoring force of the coil spring 16a to be in the open state. If the restoring force of the coil spring 16a is set to an appropriate level, the operation of the bearing 14 sliding on the rail 12 can be stopped by the bearing 14 colliding with the stop member 15 provided at the center of the rail surface. . That is, the drawer 13 is once stopped at this position and is in the first open state.

In order for the bearing 14 to get over the stop member 15, it is necessary to apply a force larger than the restoring force of the coil spring 16a which is adjusted in advance. If the drawer 13 is pulled by hand in the first open state, the stop member 15 is exposed to the biasing force of the coil spring 15b and is swung outward, and the bearing 14 can ride over the stop member 15, so that the drawer 12 can be easily moved to the maximum position. It can be pulled out to the open position. The magnitude of the force required for the bearing 14 to get over the stop member 15 can be changed by adjusting the restoring force of the coil spring 15b. When closing the drawer 13, push the drawer 13 by hand and the bearing 14 will get over the stop member 15 again,
It is retracted to a predetermined position and fixed in the closed state by the locking mechanism 17.

[Effects of the Invention] As described above, the opening / closing mechanism of the drawer of the present invention includes the rail provided on the inner surface of the drawer storage portion and the outer surface of the drawer that slides on the inner surface of the drawer storage portion on the surface of the rail. A slide bearing and a drawer stop member that comes into contact with the bearing provided at a predetermined position of the rail are provided, and the stop member is rotatably mounted on a surface opposite to the inner surface of the drawer storage portion and has a spring. Since it is projected and urged toward the rail side from the hole formed on the inner surface of the drawer housing through the above, there is an effect that the life of the stop member against fatigue damage can be extended.

[Brief description of drawings]

FIG. 1 is a sectional plan view showing an opening / closing mechanism of a drawer according to an embodiment of the present invention, FIG. 2 is a sectional plan view showing a conventional opening / closing mechanism of a drawer, and FIG. It is an expanded sectional view which follows the A line. 11: Drawer storage 12: Rail 13: Drawer 14: Bearing 15: Stop member 15b: Coil spring

Claims (1)

[Scope of utility model registration request] 1. A rail provided on the inner surface of the drawer housing portion, a bearing on the outer surface of the drawer that slides on the inner surface of the drawer housing portion and sliding on the surface of the rail, and the rail provided at a predetermined position on the rail. A drawer stop member that is in contact with the bearing; the stop member is rotatably attached to a surface opposite to the inner surface of the drawer storage portion, and the rail is formed from a hole formed in the drawer storage portion inner surface via a spring. Opening / closing mechanism of the drawer, which is characterized in that it is projected and urged to the side.