JPH0913775A - Closed door holding device - Google Patents

Abstract

PURPOSE: To make more definitely a return operation to a sealed position of a latch by providing i integrally a spring means, which energizes a latch elastically and constantly in the direction which seals a hole in a cabinet main body, on a door mounted on the door. CONSTITUTION: When a handle is operated to open a door, a turning force is transmitted to a latch 3 by way of a rod 15, a cam projection 10 pushes out the central part of a blade spring 9 provided internally on a board 5 so that the latch 3 may turn and a hook-shaped end 2 of the latch 3 may be separated from a hole 12 of a cabinet main body 11 and the door may be openable. When the hand is released from the handle, the latch 3 returns to its original position since the blade spring 9 pushes the cam projection 10 constantly. On one hand, when the hook-shaped end 2 is pushed into the hole 12, a slope area of the hook-shaped end 2 is pushed back to the inner edse of the hole 12 so that the latch 3 may be forcibly turned. At the point when the hook-shaped end 2 rides over the inner edge of the hole 12, the elastic force of the blade spring 9 returns the latch 3 to the turning motion, thereby locking the hook- shaped end 2 with the hole 12 and holding the door in a closed state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closing door holding device,
In particular, the present invention relates to a closing door holding device improved so that the returning operation of the latch to the latching position can be made more reliable.

[0002]

2. Description of the Related Art As a mechanism for holding a door of an office cabinet or a locker in a closed state, a hole 12 provided in an opening of a cabinet body 11 as shown in FIG.
A latch 3 having a hook-shaped free end that can be hooked on the door is pivotally attached to the upper and lower edge portions of the door 4, and a handle pivotally attached to the door so as to be rotatable about a vertical axis (Fig. It is known that a rod 15 is connected between a latch 3 (not shown) and a torsion coil spring (not shown) is attached to the rod 15. In this mechanism, when the handle is rotated, this turning force is transmitted to the latch 3 via the rod 15 and the cabinet body 1
When the latch 3 is rotated in the direction of releasing the engagement with the hole 12 of No. 1 and the handle is released, the elastic force of the torsion coil spring attached to the rod 15 causes the hole 1 of the cabinet body 11 to move.
The latch 3 is adapted to return-rotate in the direction in which the latch 3 is engaged.

[0003]

According to this conventional structure, since the return spring is attached to the rod, there is a backlash between the rod and the latch, and a bending in the twisting direction occurs in the rod. If this happens, the restoring force of the rod may not be sufficiently transmitted to the latch, resulting in incomplete holding of the door.

[0004] The present invention has been devised to solve such disadvantages of the prior art, and its main objects are as follows.
An object of the present invention is to provide an improved door-closing holding device so that the returning operation of the latch to the latching position can be made more reliable.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a latch which can be hooked in a hole of a cabinet body and a base plate which is attached to a door in a state where the latch is pivotally supported and which is parallel to the plane of the door. The structure of the door closing device that is operated to open the door by transmitting the turning force applied to the handle attached to the door rotatably about the shaft to the latch via the rod is hooked in the hole of the cabinet body. This is achieved by providing spring means for integrally elastically urging the latch in such a direction as to be integrated with the substrate.

Particularly, it is preferable to provide a projecting piece for applying an elastic pressing force to the rod member in a direction perpendicular to the axis of the rod member in the vicinity of the hole in the latch for inserting the rod member.

[0007]

With this structure, since the return turning force is directly applied to the latch, the latch can be reliably returned to the closed holding position. Further, the pressing force of the projecting piece against the rod removes the play between the rod and the latch.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below in detail with reference to specific embodiments shown in the accompanying drawings.

1 and 2 show a closing door holding device 1 constructed according to the present invention. This door holding device 1
Is composed of a latch 3 having a hook-shaped end 2 formed at a free end thereof, and a substrate 5 connected to upper and lower end edges of a door 4 in a state where the latch 3 is pivotally supported.

The base plate 5 has a pawl 7 elastically engaged with an ear piece 6 formed on the door 4 (see FIG. 3) and a leaf spring part having both ends for exerting an elastic force on the base end 8 of the latch 3. 9 and are integrally molded of a highly elastic synthetic resin material.

A cam projection 10 is provided on the base end 8 of the latch 3 so as to project radially outward. When the cam protrusion 10 is pushed by the leaf spring portion 9, the latch 3 is rotationally biased in a direction in which the hook-shaped end 2 is locked in the hole 12 provided in the cabinet body 11.

Protrusions 13 are provided at both ends of the leaf spring portion 9 so as to come into contact with the inner surface of the door 4. As a result, outward deformation of the leaf spring portion 9 is suppressed, and desired spring rigidity can be obtained without increasing the wall thickness.

A square hole 14 is formed at the base end 8 of the latch 3, and a rod 15 having a square cross section integrally connected to a handle (not shown) rotatably provided on the door 4 is provided. By inserting into the square hole 14, the door opening operation force applied to the handle can be transmitted to the latch 3.

At the base end 8 of the latch 3, its free end is the square hole 1.
A projecting piece 16 curved toward the center side of 4 extends in the axial direction. The projecting piece 16 elastically presses the rod 15 inserted in the square hole 14 to remove rattling between the latch 3 and the rod 15, and at the same time, exerts an action of preventing the latch 3 on the rod 15 from slipping. .

When the handle is opened, the turning force is transmitted to the latch 3 via the rod 15. Then the cam protrusion 1
0 pushes away the central portion of the leaf spring portion 9 to rotate the latch 3, and the hook-shaped end 2 of the latch 3 separates from the hole 12 provided in the cabinet body 11. This allows the door to be opened.

When the hand is released from the handle, since the leaf spring portion 9 constantly pushes the cam projection 10, the latch 3 returns to its original position and rotates.

When closing the door, the hole 1 in the cabinet body 11
When the hook-shaped end 2 of the latch 3 is pushed into the pin 2, the slanted surface 17 of the hook-shaped end 2 is pushed away by the inner edge of the hole 12, so that the latch 3 is forcibly rotated and the hook-shaped end 2 is moved to the hole 12. The latch 3 is returned and rotated by the elastic force of the leaf spring portion 9 when it has passed over the inner edge of the hook, and the hook-shaped end 2 is locked in the hole 12 and the closed state is maintained.

[0018]

As described above, according to the present invention, since the restoring biasing force directly acts on the latch, the rattling between the latch and the rod is removed by the elastic force of the projecting piece. As a result, the reliability of the closing and holding operation is further enhanced. Further, the elastic force of the projecting piece also has the effect of temporarily fixing the latch to the rod, so that the assembling property is also improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a door closing device according to the present invention.

FIG. 2 is a side cross-sectional view showing a part cut away along the line II-II in FIG.

FIG. 3 is a partial sectional view taken along the line III-III in FIG.

FIG. 4 is a partial perspective view of a cabinet to which the present invention is applied.

[Explanation of symbols]

 1 Door closing device 2 Hook type end 3 Latch 4 Door 5 Board 6 Ear piece 7 Claw 8 Base end 9 Leaf spring part 10 Cam protrusion 11 Cabinet body 12 hole 13 Protrusion 14 Square hole 15 Rod 16 Projection piece 17 Inclined surface

Claims (2)

[Claims] 1. A door having a latch which can be hooked in a hole of a cabinet body, and a substrate which is attached to the door while the latch is pivotally supported, and is rotatable around an axis parallel to a plane of the door. A door-closing holding device that is operated by opening a door by transmitting a turning force applied to a handle attached to the latch via a rod, and always latches the latch in a direction to be locked in a hole of the cabinet body. A closing door holding device, wherein spring means for urging and urging is provided integrally with the substrate. 2. A projecting piece for applying an elastic pressing force to the rod in a direction perpendicular to the axis of the rod is provided in the vicinity of a hole through which the rod is inserted in the latch. The closing door holding device according to claim 1.