JP2553289B2 - Door lock latch actuator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch actuating device for reversing a latch to open and close a door lock.

[0002]

2. Description of the Related Art Conventionally, door locks with a trigger mechanism have been used for doors of hotel guest rooms and the like, in which a latch is retracted by a slight force to open and close the door.

FIG. 10 shows a conventional door lock with a trigger mechanism. In this door lock, a latch bolt 62 provided inside a case 61 is urged by a coil spring 63 in a direction of protruding from the case 61. The latch bolt 62
A trigger member 65 is rotatably attached to the tip of the shaft via a fulcrum shaft 64. Further, the pin 66 provided on the trigger member 65 is fitted into the long hole 67 of the latch bolt 62, and the tip end portion of the trigger member 65 is projected from the tip inclined surface 68 of the latch bolt 62.

In this door lock, the position at which the tip of the trigger member 65 and the receiving metal fitting 50 of the door frame abut is set to a distance closer to the fulcrum shaft 64 than the pin 66, and the coil spring is different from the coil spring depending on the distance. A lever mechanism is formed, and when the receiving fitting 50 and the trigger member 65 come into contact with each other, the lever spring causes the coil spring 63 to contract with a large force,
The latch bolt 62 is designed to be immersed.

[0005]

However, in the above conventional door lock, the latch bolt 62 has the trigger member 65.
Since it slides integrally with the latch bolt 62, the spring force of the coil spring 63 always acts on the latch bolt 62, and as the coil spring 63 contracts, a repulsive force gradually increases.
Will join. For this reason, there is a characteristic that the movement of the latch bolt that is immersed gradually becomes sluggish, the responsiveness of the movement of the latch bolt is poor, and sometimes the movement of the latch bolt is stopped during the immersion.

In a hotel or the like, a function of opening the door immediately is required in the event of an emergency such as a fire or an earthquake. In the conventional door lock shown in FIG. 10, the latch bolt 62 is completely closed. The lock cannot be unlocked unless the operation handle or the like is turned until it is immersed in the case 61, so there is a drawback that it takes time to open the door.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a latch actuating device capable of lightly and smoothly moving a latch in and out and opening a door immediately.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention includes a reversible latch protruding and retracted from a case and a slider urged toward the latch by an elastic member. Provided between the latch and the slider is a movably provided trigger member whose rear end portion abuts the slider, and is formed such that the tip end portion of the trigger member is retractable from the tip inclined surface of the latch, to the slider, the engagement member to stop the inversion of the latch is provided to engage the rear end of the latch, to the trigger member, expansion much convey the rear end portion of the movement amount received by tip luck
The dynamic expansion mechanism was incorporated.

As a second means, the present invention attaches the above-mentioned engaging member so as to be movable in a direction different from the moving direction of the slider, and the movement causes the engaging member to engage with the rear end portion of the latch. It was configured to leave.

[0010]

In the latch actuator having the above structure, the slider normally pushes the trigger member toward the latch so that the tip of the trigger member projects from the inclined surface of the latch. When the door frame receiving metal member comes into contact with the tip end portion of the trigger member from this state when the door is closed, the rear end portion of the trigger member is pushed back by the enlarged movement amount by the action of the motion enlargement mechanism. Then, when the engagement member of the slider and the rear end of the latch are disengaged, the latch can be freely inverted, so that the door after that can be extremely lightly retracted. You can

On the other hand, when the door lock is opened, the slider is moved in the direction away from the latch by operating the door handle or the like to disengage it from the engagement position with the latch. As a result, the latch can be flipped over so that the door can be opened immediately.

According to the second means of the present invention,
When the engagement member is moved, the engagement between the slider and the latch can be released, so that the door can be opened without pushing back the slider.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the entire structure of the door lock of the embodiment. An electromagnetic lock mechanism C is provided on the upper portion of the door lock, and a latch actuating device A and a latch actuating device A therebelow are provided.
An operation mechanism B for operating is provided.

As shown in FIGS. 2 to 5, the latch actuating device A is provided with a pair of partition plates 3 and 3 inside the lock box 1 of the door lock, and the partition plates 3 and 3 and the lock box 1 are provided. The side plate and the front plate form a box-shaped case 2. Also,
An opening 5 is formed in the front plate 4 of the case 2 so as to face the receiving fitting 50 of the door frame, and a latch 6 is attached to the opening 5.

The latch 6 is incorporated in the opening 5 of the case 2 so as to be retractable and retractable inside the case 2, and a step portion 7 provided on both side surfaces of the latch 6 is provided.
The front plate 4 of the case is engaged with the front plate 4 to prevent the latch from coming out forward. In the latch 6, one side surface of the tip is formed with an inclined surface 8 and the other side surface is formed with a vertical surface 9, and a through groove 10 into which a trigger member 22 described later is slidably inserted is formed in the central portion. Has been formed. Further, at the rear end of the latch 6, an engaging member 1 described later is provided.
A pair of protrusions 11, 11 with which 6 is engaged is formed, and the engaging portion 21 of the engaging member 16 is provided between the both protrusions 11, 11.
A gap 12 having a width larger than the width of is provided.

On the other hand, inside the case 2, a slider 13 is movably provided, and coil springs 14 and 14 for urging the slider toward the latch 6 are incorporated on the rear side of the slider 13.

Further, a space 15 is formed inside the slider 13 and opens forward and sideways, and an engaging member 16 is incorporated in the space 15. The engagement member 16 is slidable in a direction orthogonal to the moving direction of the slider 13 by fitting the long holes 17 and 17 and the pins 18 and 18 provided on the slider 13. Further, the engaging member 16 is always urged downward by a spring 19 incorporated in the inner side of the space 15, and the end portion of the engaging member 16 is provided on the side surface of the slider 13 by this urging. It projects from the opening 20 toward the operation mechanism B.

Further, on one side of the engaging member 16,
Engagement portion 2 that engages with projections 11 and 11 at the rear end portion of latch 6
1 is formed, the inversion of the latch 6 is stopped by the engagement of the engaging portion 21 and the protrusion 11, and the latch 6 is held in the upright state.

A trigger member 22 is movably incorporated between the latch 6 and the slider 13.
The trigger member 22 includes an operating piece 23 having an inclined surface 24 at its tip, a pressing plate 26 rotatably attached to one end of the operating piece 23 via a pin 25, and the other end of the operating piece 23. A guide plate 28 rotatably attached to the slider 13 by a pin 27, and the rear end portion of the pressing plate 26 is attached to the slider 13.
Is in contact with a recess 29 formed in the front surface of the.

Further, the operation piece 23 on the tip side is inserted into the through groove 10 of the latch 6 and is incorporated so as to be retractable from the tip side of the latch. As shown in FIG. 5, the latch 6 stands up. In this state, the inclined surface 24 of the operating piece 23 projects forward from the inclined surface 8 at the tip of the latch, and
It comes into contact with 0.

On the other hand, guide plates 30 and 31 made of synthetic resin are attached to both side surfaces of the case 2, and the trigger member 22 is provided in guide grooves 32 and 33 provided in the guide plates 30 and 31 in the longitudinal direction of the case. Pressing plate 26
And the guide plate 28 are slidably fitted together. The guide grooves 32 and 33 allow the slider 13 to move when the trigger member 22 moves.
It serves to guide along the moving direction of.

Further, both ends of a winding spring 34 fitted on the pin 25 are engaged with the inner surfaces of the pressing plate 26 and the operating piece 23, and the operating spring 23 and the pressing plate 26 are engaged by the winding spring 34. It is urged away from each other. As a result, the pressing plate 26 is constantly pressed toward the recess 29 of the slider 13, and the pressing plate 26 and the guide plate 28 are pressed toward the guide plates 30 and 31 on both sides, and both plates 26 are pressed. , 28 has one guide groove 3
The trigger member 22 is rotated about the connecting pin 27 of the guide plate 28 as a fulcrum in a state of being fitted in the casings 2 and 33 as shown in FIG.

Further, in the trigger member 22, the distance L ₁ from the position where the operating piece 23 and the receiving metal fitting 50 abut to the pin 27 which is the fulcrum of rotation is from the fulcrum pin 27 to the connecting pin 25 of the pressing plate 26. Less than distance L ₂ (L
₁ <L ₂ ) is set, and the motion expansion is
It constitutes a large mechanism. That is, when the receiving metal fitting 50 comes into contact with the inclined surface 24 of the operating piece 23, the operating piece 23 is pin 2
7 about the fulcrum, but due to the action of the motion enlarging mechanism due to the difference between the distances L ₁ and L ₂ , the pressing plate 26 is moved.
The dynamic stroke is enlarged and the push-back plate 26 pushes it back.
The push-back stroke of the rider 13 can be extended.
It

On the other hand, as shown in FIG. 2, the door lock operating mechanism B provided adjacent to the latch actuator A includes an operating shaft 35 to which the door handle is connected and a notch 36 on the peripheral surface of the operating shaft 35. The switch piece 37 that abuts is provided, and the switch piece 37 faces the end portion of the engaging member 16 that protrudes from the case 2. In this operation mechanism B, when the switch piece 37 is turned upward by the operation shaft 35 as shown in FIG. 3, the engaging member 16 is pushed upward and the engaging portion 2 is moved.
1 moves to the gap 12 between the protrusions 11 of the latch 6, and the latch 6 is free to be inverted.

The electromagnetic lock mechanism C provided on the upper portion of the door lock is, as shown in FIG. 1, a solenoid 38, a lock shaft 39 driven by the solenoid 38, and an operation shaft 35 of the operation mechanism B from the solenoid 38. When the solenoid 38 is actuated, the lock shaft 39 pops out and locks, and the connecting member 40 pushes the notch 41 on the peripheral surface of the operating shaft 35 to rotate the switch piece 37. It is like this.

The door lock of the embodiment has the above structure,
Next, the operation will be described. In a normal state, as shown in FIGS. 2 and 5, the elasticity of the coil spring 14 pushes the slider 13 forward, the engagement member 16 engages with the protrusion 11 of the latch, and the latch 6 is held in an upright state. . Further, the trigger member 22 is pressed against the latch 6, and the tip of the operating piece 23 is in a state of protruding from the inclined surface 8 of the latch 6.

From this state, when the receiving metal fitting 50 of the door frame comes into contact with the inclined surface 24 of the operating piece 23, the operating piece 23 rotates about the pin 27 as a fulcrum, but the above operation is performed by the action of the motion enlarging mechanism. The movement amount of the piece 23 is enlarged and transmitted to the pressing plate 26, and the pressing plate 26 pushes the slider 13 back. Therefore, the coil spring 14 contracts and the slider 13
Moves rearward, and the operating piece 23 moves rearward.

When the slider 13 is pushed back in this way, as shown in FIG. 5, the engagement between the engaging member 16 and the projection 11 is disengaged, and the latch 6 is in an invertible state. The latch 6 is retracted and the door is closed smoothly.

Next, when the door is completely closed and the receiving metal fitting 50 and the latch 6 come to a position where they face each other as shown in FIG. 7, the latch 6 is pushed to the receiving metal fitting 50 by pushing out the slider 13 by restoring the coil spring 14. The latch 6 is pushed out, the engagement member 16 and the protrusion 11 are engaged with each other, and the posture of the latch 6 is maintained in the upright state.

On the other hand, when the door is opened, as shown in FIG. 3, the operation shaft 35 of the operation mechanism B is rotated by the door handle, and the engaging member 16 is pushed up by the switch member 37 to project the engaging portion 21 and the latch 6. Disengage with 11. As a result, the latch 6 is in a state in which it can be freely inverted, so when the door is opened next, the latch 6 abuts the receiving metal fitting 50 and easily inverts as shown in FIG. 8, while pushing back the trigger member 22. Immerse yourself in Case 2. Therefore, the door can be opened immediately by a slight turning operation of the door handle.

In the above-mentioned latch actuating device A, the direction of the latch 6 is changed as shown in FIG. 9, and the pressing plate 26 of the trigger member 22 is brought into contact with another recess 29 of the slider 13, You can easily change it to a reverse-handed door lock.

[0032]

As described above, according to the present invention, when the slider is pushed back together with the trigger member, the engagement between the slider and the latch is disengaged, and the latch is freely inverted. Therefore, when the door is closed, the latch is slightly retracted. The door can be closed securely and smoothly.

Further, since the latch can be turned upside down by disengaging the latch from the slider, there is an advantage that the door can be opened immediately by a slight operation amount of the door handle or the like.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing the entire structure of a door lock.

FIG. 2 is a cross-sectional view showing an enlarged main part of the above.

FIG. 3 is a sectional view showing the operating state of FIG.

FIG. 4 is an exploded perspective view showing a latch and a trigger member of the latch actuator.

FIG. 5 is a cross-sectional plan view of a latch actuator.

FIG. 6 is a sectional view showing an operating state of the above.

FIG. 7 is a sectional view showing an operating state of the above.

FIG. 8 is a sectional view showing an operating state of the above.

FIG. 9 is a sectional view of a latch actuating device in which the direction of the latch is changed.

FIG. 10 is a sectional view showing a conventional example.

[Explanation of symbols]

 A latch actuating device B operating mechanism C electromagnetic locking mechanism 1 lock box 2 case 6 latch 8 inclined surface 11 protrusion 13 slider 14 coil spring 16 engaging member 21 engaging portion 22 trigger member 23 operating piece 26 pressing plate 28 guide plate 35 operating axis 37 Switch piece 50 Receiving bracket

Claims (2)

(57) [Claims] 1. A reversible latch protruding and retracted from the case and a slider urged toward the latch by an elastic member are provided inside the case, and a rear end portion of the slider is provided between the latch and the slider. A trigger member that abuts is provided movably, and the tip end portion of the trigger member is formed to be retractable from the tip inclined surface of the latch. an engagement member for stopping the inversion provided in the trigger member, expansion much convey the rear end portion of the movement amount received by tip luck
A door lock latch actuator that incorporates a dynamic expansion mechanism. 2. The engaging member is movably attached in a direction different from the moving direction of the slider, and the engaging member is disengaged from the rear end portion of the latch by the movement. The door lock latch actuator described in.