JPH0527650Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a push-button-operated door catch device in which a latch mechanism is operated in the unlocking direction by pushing a push button placed on the front of the door. .

[Prior Art] The conventional push button operated door catch device disclosed in Japanese Utility Model Publication No. 54-29073 has a push button fitted into the hollow of a case fixed to the door, and a guide at the rear end of the case. A lock shaft that protrudes into the hollow of the case from the center hole of the plate is fixed to the fixed frame, and a release spring that presses against the rear surface of the guide plate is fitted and fixed to the lock shaft, so that when the push button is pushed in, the lock shaft is fixed to the fixed frame. A locking plate whose end abuts the front is fitted into the case hollow so that it can be tilted freely, a return spring is inserted between the push button and the locking plate, and a part of the rear of the locking plate protrudes from the front of the guide plate. A lock hole is provided in the center of the lock plate, supported by a protruding piece, into which a lock shaft can be inserted when the lock plate is erected.

[Problems to be solved by the invention] This conventional device has a relatively large number of component parts, which not only increases manufacturing and assembly costs, but also causes the edge of the lock hole in the tilted lock plate to touch the circumferential surface of the lock shaft. Since the structure is such that the door is locked in the closed position by biting the lock shaft, repeated use will cause large and small scar protrusions to protrude on the circumferential surface of the lock shaft, and these protrusions will interfere with the guide hole and lock hole. The lock shaft may not be inserted smoothly.

Therefore, the purpose of the present invention is to reduce the cost of manufacturing and assembly due to the small number of component parts, and to prevent the operation from becoming unsmooth due to repeated use.
To provide a push-button actuated door catch device that always operates easily by one-touch operation of a push button.

[Means for Solving the Problems] Hereinafter, it will be explained using the reference numerals in the attached drawings. The push button actuated door catch device of the present invention is fixed to the back side of the door 1, and is attached to the through hole 2 of the door 1. A base plate 4 has an operation space 3 opened to the front side of the door through the base plate 4; the base end is pivoted to one end side of the bearing plate portion 5 of the base plate 4 by a fixed pivot 6 parallel to the front side of the door 1. a restraining lever 8 having a protruding locking claw 7 at its tip; a base end pivotally connected to the other end side of the bearing plate part 5 by a fixed pivot shaft 9 parallel to the fixed pivot shaft 6; A first receiving groove 10 and a second receiving groove 11 in which the locking pawl 7 engages and disengages are provided adjacent to each other on the side surface, and when the locking pawl 7 engages with the first receiving groove 10, the receiving groove on the fixed frame 12 side A latch lever 15 having a protruding locking groove 14 at its tip that engages with the metal part 13; a tension coil spring 16 installed between the restraint lever 8 and the latch lever 15; and a tension coil spring 16 that fits into the through hole 2 of the door 1. and a push button 17 that comes into contact with the middle part of the restraint lever 8. Pushing and moving the push button 17 rotates the restraint lever 8, and the locking claw 7 and the first
This is to release the engagement of the receiving groove 10.

[Function] When the fingertip is inserted into the through hole 2 of the door 1 and the push button 17 is pushed, the restraint lever 8 whose intermediate portion is pushed by the push button 17 moves counterclockwise in FIG. 2 around the fixed pivot 6. Rotate to. This rotation causes the locking pawl 7 of the restraint lever 8 to lock into the first receiving groove 1 of the latch lever 15.
0, the latch lever 15 receives the traction force from the tension coil spring 16 and rotates counterclockwise about the fixed pivot 9.

During the rotation process of the latch lever 15, the locking groove 1
Since the tip of the long groove wall 14a of No. 4 presses the receiving part 13 of the fixed frame 12 under the force of the tension coil spring 16, the door 1 is opened by the reaction.
The rotation of the latch lever 15 and the restraining lever 8 is stopped when the locking pawl 7 engages with the second receiving groove 11 as shown in FIG. The engaged state of the groove 11 is maintained by the traction force of the tension coil spring 16.

When closing the door 1, the tip of the long groove wall 14a of the locking groove 14 first touches the receiving part 1 of the fixed frame 12.
3, the latch lever 15 is moved against the fixed pivot 9
It rotates clockwise in Fig. 4 around .
Long groove wall portion 14a and short groove wall portion 14 of locking groove 14
The door 1 is locked with respect to the fixed frame 12 by inserting the money receiving part 13 between the openings 1 and 2b.

At the starting end of the rotation of this latch lever 15, the second
Since the receiving groove 11 and the locking pawl 7 are disengaged, the restraint lever 8 receives the traction force from the tension coil spring 16 and rotates clockwise around the fixed pivot 6, which prevents the rotation of the latch lever 15. At the terminal end, the first receiving groove 10 and the locking pawl 7 engage with each other. This state of engagement between the first receiving groove 10 and the locking pawl 7 is maintained by the traction force of the tension coil spring 16.

[Embodiment] In the illustrated embodiment, the base plate 4 has a mounting plate portion 21 extending at right angles from the base end of a U-shaped bearing plate portion 5, and a small hole in the mounting plate portion 21 is formed in the base plate 4. 22
It is fixed to the back surface of the door 1 by a screw 18 passing through. A spring support pin 19 is installed and fixed between the opposing side walls of the restraint lever 8 having a U-shaped cross section, and the latch lever 1 is bent and formed to have a U-shaped cross section.
A spring support pin 20 is installed and fixed between the side wall portions 5. The ring portions at both ends of the tension coil spring 16 are fitted into the spring support pins 19 and 20.

The push button 17 is made of rubber, and when the rectangular main portion is fitted into the through hole 2 of the door 1, the push button 17 is inserted into the proximal annular collar 2.
3 is adhesively fixed to the back of door 1. The operating space 3 of the base plate 4 is formed between the bearing plate portions 5 having a U-shaped cross section, and the push button 17 has a main body that elastically deforms and moves into the operating space 3, and the restraining lever Press 8. After the restraining lever 8 is driven, the main body portion of the push button 17 is elastically restored and separated from the intermediate portion of the restraining lever 8. Therefore, in this embodiment, there is no need to separately provide a spring means for returning the push button 17.

[Effects of the invention] As described above, the push button actuated door catch device of the present invention has a base plate 4 fixed to the back of the door 1.
, a restraint lever 8 pivotally connected to the base plate 4 by a fixed pivot 6, a latch lever 15 pivotally connected to the base plate 4 by a fixed pivot 9, and a structure between the restraint lever 8 and the latch lever 15. An installed tension coil spring 16 and a push button 17 fitted into the through hole 2 of the door 1
In addition to having a small number of components as a whole, the tension coil spring 16 is used both for holding the restraint lever 8 and the latch lever 15 in engagement and for driving the door 1 to open, and a plurality of spring means are separately incorporated. Since this is not necessary, the device can be manufactured and assembled at low cost.

In addition, the locking claw 7 of the restraint lever 8 and the latch lever 1
The engagement and disengagement of 5 with the first receiving groove 10 and the second receiving groove 11 is as follows.
Since the restraint lever 8 and the latch lever 15 rotate in the same direction along the tangential direction, the locking claw 7
This device does not cause the phenomenon of forcible biting, and even after repeated use over a long period of time, it operates easily and smoothly with a small amount of force.

[Brief explanation of drawings]

FIG. 1 is a front view of a door using a push-button-operated door catch device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. is a sectional view taken along the line B-B in FIG. 1, and FIG. 4 is a sectional view of the door in an open state. 1...Door, 2...Through hole, 3...Operation hole, 4...
Base plate, 5...Bearing plate portion, 6...Fixed pivot, 7
... Locking claw, 8 ... Restraint lever, 9 ... Fixed pivot, 10 ... First receiving groove, 11 ... Second receiving groove, 12
. . . Fixed frame body, 13 . ...Push button, 18...Fixing screw, 1
9, 20... Spring support pin, 21... Mounting plate portion, 22... Small mounting hole, 23... Proximal annular collar portion, 24... Bottom wall portion for regulating the rotation angle of the restraining lever.

Claims (1)

[Scope of utility model registration request] a base plate 4 fixed to the back side of the door 1 and provided with an operation space 3 opened to the front side of the door through a through hole 2 of the door 1; a fixed pivot 6 whose base end is parallel to the front side of the door 1;
A restraining lever 8 is pivotally attached to one end side of the bearing plate portion 5 of the base plate 4 by a locking lever 8 and has a locking claw 7 protruding from its tip.
and; a first receiving groove 10 whose base end is pivotally connected to the other end side of the bearing plate part 5 by a fixed pivot 9 parallel to the fixed pivot 6, and a locking pawl 7 engages and disengages from the side surface of the base end; Second receiving groove 1
1 are provided adjacent to each other, and the latch lever has a locking groove 14 protruding from the tip thereof, which engages with the receiving part 13 on the fixed frame 12 side when the locking pawl 7 engages with the first receiving groove 10. 1
5; a tension coil spring 16 installed between the restraining lever 8 and the latch lever 15; and a push button 17 fitted into the through hole 2 of the door 1 and abutting the middle part of the restraining lever 8. A push-button-operated door catch device that rotates a restraining lever 8 by pushing the locking lever 17 to disengage the locking pawl 7 and the first receiving groove 10.