JPS6221637Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a door lock in which when the door is closed, the amount of protrusion of the latch becomes larger than the amount of protrusion in the normal state due to the action of the trigger, so that it can become a dead bolt. .

Conventional door locks of this type include, for example, the Jikko 55-
There is a device No. 50292, but in the case of these conventional door locks, the rotating piece is rotated by the retraction of the trigger,
Since the control member for controlling the protrusion of the latch is slid back and forth by the pivot piece, the resistance force when the trigger is moved back is increased. Therefore, when the door is closed, the large resistance force of the trigger is added to the resistance of the latch, so there is an inconvenience that a large force is required to close the door.

Furthermore, even if only the trigger is pushed in when the door is open, even if an impact is applied to the door while the door is open, the member that restricts the protrusion of the latch will move back, increasing the amount of protrusion of the latch, and if the door is closed as it is, the member that restricts the latch will move backwards. This had the disadvantage of damaging the latch bolt, which was in a dead bolt state, and damaging the frame.

This invention is intended to solve all of the above-mentioned drawbacks of the conventional technology.As the members that control the amount of latch protrusion are all designed to rotate when the trigger is retracted, the resistance force when the trigger is retracted is extremely low. Because it is small, the door can be closed smoothly. Another object of the present invention is to provide a door lock that has excellent operability and safety, such as not increasing the protrusion amount of the latch unless the trigger and latch are retracted at the same time.

The following description will be made based on the illustrated embodiments.

1 is a latch, and 16 is an auxiliary latch placed in the center of the bifurcated rod _l1 of the latch 1, with an auxiliary latch handle 16a inserted into a through hole 1c provided in the latch handle 1a. 1b and 16b are washers fixed to the rear ends of the latch handle 1a and the auxiliary latch handle 16a, respectively, and a spring 17 is provided between the washer 16b and the case 2, and a U-shaped washer is slidably attached to the auxiliary latch handle 16a. A spring receiver 3 is fitted between the latch handle 1a and the washer 16b, and a spring 4 is provided between the rear end of the latch handle 1a and the spring receiver 3.

The latch then moves back against springs 4 and 17. Note that 6 is a U-shaped locking member fixed to the latch handle 1a.

A control member 7 is pivotally supported on the case 2, and has a substantially U-shaped cross section, and is pivotally supported on both sides.

A cam 9 is fitted into the U-shaped space of the control member 7, is coaxially supported with the control member 7, and is rotatable independently. The cam 9 has a return spring 11 disposed between the case 2 and one end of the cam 9.
is always biased clockwise in FIG.
Further, the control member 7 is always biased counterclockwise in FIG. 1 by a return spring 10 disposed between the control member 7 and the cam 9. It comes into contact with one end 9b of the cam 9, and further rotation is prevented. Further, the clockwise rotation of the control member 7 is prevented by one end abutting against a pillar 80 fixed to the case. On the other hand, cam 9 is spring 1
1 in the clockwise direction, one end 9b of the cam 9 presses against the upper side 7 of the control member 7 as described above.
a, and further rotation is prevented and the state shown in FIG. 1 is maintained.

Note that one side 6a of the locking member 6 fixed to the latch is in contact with the upper side 7a of the control member 7, and the latch 1
The protrusion of 2 is restricted and the lock is held in the unlocked state shown in FIG. Further, a locking portion 6b is formed at the tip of one side 6a of the locking member 6, and the locking portion 6b engages with the upper side 7a of the control member 7. Therefore, cam 9
Even if the control member 7 is allowed to rotate counterclockwise and the control member 7 is allowed to rotate counterclockwise, the upper side 7a of the control member engages with the locking portion 6b, and the rotation of the control member 7 is prevented. blocked.

On the other hand, reference numeral 12 denotes a trigger fitted in the case 2 so as to be retractable, and its retreating portion is at one end 9a of the cam.
When the door is open, the state shown in FIG. 1 is maintained.

In addition, reference numeral 14 in the figure is a latch hub, through which the shaft 15 of a knob or handle (not shown) is inserted, and rotates together with the rotation of the handle, and the operating part 14a of the latch hub 14 is fixed to the latch handle 1a. One piece 6c of one locking member 6 is pushed to retract the latch 1.
In addition, in the state shown in FIG. 1, the operation part 14a of the hub is
Since it is not in contact with c, the handle will idle until it does. 15a is a torsion spring that urges the latch hub 14 counterclockwise.

Reference numeral 18 denotes a locking member that is pivotally supported 19 on the upper part of the case 2. Reference numeral 20 denotes a hub pivotally supported by the case 2. An operating pin 22a provided on a cylinder or thumbturn operation cam 22 is engaged with a recess 20a provided at one end, and the hub is rotated by operation of the cylinder or thumbturn. . Note that the operating pin 18a fixed to the rear end of the locking member 18 is connected to the hub 20.
When the hub 20 rotates, the locking member 18 is rotated.

Reference numeral 23 designates a torsion spring, one end of which is hooked onto the operating pin 18a of the locking member 18 and the other end of which is hooked onto the hub 20, biasing the locking member 18 clockwise and the hub 20 counterclockwise. Further, 24 is a click spring that urges the hub 20 in a direction to stabilize it in the locked position and the unlocked position.

The operation of the present invention having the above configuration will be explained.

FIG. 1 shows the door in the open position, with the latch 1 and trigger protruding. Next, when the door is closed, the latch 1 and the trigger 12 come into contact with the receiver and retreat due to the action of the slope, resulting in the state shown in FIG. 2a.

At this time, one end 9a of the cam 9 is pushed against the rear part of the handle 12a of the trigger 12, and the cam 9 is rotated against the spring 11. Further, the control member 7, whose rotation was restricted by the tip of one end 9b of the cam 9 and the locking portion 6b of the locking member 6, is no longer restricted from rotating, so that the control member 7 is moved by the spring 10 as shown in FIG. 2a. turned into a state.

It should be noted that the resistance force that acts when the trigger 12 is retracted is the spring 10 in a direction that cancels out the biasing force of the spring 11.
Since the biasing force of is applied, the resistance force when the trigger 12 is retreated is extremely small.

Next, when the door is completely closed, latch 1 will be at receiver 30.
It protrudes and fits into the receiving hole 30a. (Double-dot chain line in FIG. 2a) In the open state of the door shown in FIG.
However, when the door is completely closed, the control member 7 is rotating, so the latch 1 is in contact with the locking member 6 as shown by the two-dot chain line in Figure 2a. One piece 6c is the latch hub 14
It protrudes until it comes into contact with the operating section 14a. That is, latch 1 performs the function of a dead bolt. In this state, operate the thumb turn or cylinder to lock the locking member 18 via the hub 20 as described above.
As shown in the two-dot chain line in Figure 2a, rotate the
When its tip is engaged with the stepped portion 1d of the latch 1, the latch is prevented from retreating and becomes locked. That is, the latch 1 cannot be moved back by rotating the handle. To unlock, turn the thumb turn or cylinder in the opposite direction to return the locking member 18 to its original state. In this condition, the latch can be retracted by the latch hub 14 by rotating the handle.

When only the trigger 12 is pushed in in the open state of FIG. 1, one end 9a of the cam 9 is pushed by the rear end of the handle 12a of the trigger 12 (FIG. 3), and the cam 9 is rotated against the The control member 7 whose rotation is restricted by the tip of one end 9b of the cam
However, the restriction is lifted and the spring 10 attempts to rotate counterclockwise, but the latch handle 1a
A locking portion 6b of a piece 6a of the locking member 6 fixed to
The upper side 7a of the control member 7 is in contact with the upper side 7a of the control member 7, and cannot be rotated. Therefore, the piece 6a of the locking member 6 is maintained in contact with the rear end portion of the upper side 7a of the control member 7, and the latch 1 does not protrude any further.

Further, even if some kind of impact is applied to the door and a counterclockwise rotational force acts on the control member 7, the control member 7 cannot be rotated in the same manner as described above.

That is, even if a person intentionally or unknowingly touches the trigger 12 and pushes the trigger while the door is open, or even if an impact is applied to the door, the latch 1 will remain as shown by the two-dot chain line in Figure 2a. It doesn't stand out like that.

If, when the door is open, latch 1 protrudes as shown by the two-dot chain line in Figure 2a and becomes a dead bolt, then if the door is closed as it is, then
The side surface 1e of the latch 1 collides with the receiver or frame, damaging the latch and causing the door lock to malfunction.

However, in this case, unless the door is completely closed,
Latch 1 cannot be in a dead bolt condition and the above-mentioned disadvantages do not occur.

When only the latch 1 is pushed in in the open state shown in Fig. 1 (Fig. 4), the latch 1 moves backward against the spring 4, and the locking member 6 fixed to the latch handle 1 also moves away. retreat,
The blocking of rotation of the control member 7 by the locking portion 6b is released. However, since the trigger 12 has not retreated, the cam 9 cannot rotate, and the upper side 7a of the control member 7 comes into contact with one end 9a of the cam 9, preventing its rotation. That is, the control member 7 and the cam 9 maintain their original state, and even when the pushing force of the latch 1 is released, the piece 6a of the locking member 6 comes into contact with the control member 7, maintaining the state shown in FIG. do.

Next, when the door is unlocked from the locked state (double-dashed line diagram in Figure 2a).

If the locking member 18 is blocking the latch 1 from retracting, first operate the thumb turn or cylinder to release the locking member 18, and then turn the handle to release the hub 1.
4 rotate together, and the operation part 14a is connected to the latch handle 1.
The latch 1 is moved back by pushing the piece 6c of the locking member 6 fixed to the latch 6a. And when the door opens,
The trigger 12 protrudes and the cam 9 and control member 7 return to the state shown in FIG. Then, when the rotation force of the handle is released, the latch protrudes, but
Its protrusion is regulated by the control member 7 and maintained in the state shown in FIG.

As described above, according to the door lock of the present invention, the control member 7 that controls the protrusion of the latch 1 by retraction of the trigger 12 and the arm 9 are rotatably coaxially supported in a small space, and each return spring 1
0 and 11 apply rotation biasing forces in opposite directions, so the operation of the control member 7 and cam 9 is extremely smooth, and the resistance force that acts when the trigger retreats is small, so the door closes smoothly. can.

Furthermore, even if the cam 9 is rotated by pushing in only the trigger 12 with the door open, the control member 7 will not rotate even if an impact is applied to the door, so the amount of latch protrusion will be large. It will never be,
It is possible to provide an extremely safe product that prevents damage to the latch or door frame by closing the door with the latch having a large protruding amount.

[Brief explanation of the drawing]

FIG. 1 is a front view of the internal structure of the proposed door lock in the open state. FIG. 2a is a front view of the main parts of the same in the middle of closing the door, and FIG. 2b is a top view of the main parts showing the state from the open state to the closed state. FIG. 3 is a front view of the main part when only the trigger is pushed in with the door open, and FIG. 4 is a front view of the main part when only the latch is pushed in. FIG. 5 is a perspective view showing the assembled state of the control member 7 and the cam 9. 1... Latch, 2... Case, 6... Locking member, 7... Control member, 9... Cam, 12... Trigger, 14... Hub, 16... Auxiliary latch, 18
... Locking member, 20 ... Hub.

Claims (1)

[Scope of utility model registration request] The latch 1 is fitted into the case 2 via a spring 4 so as to be freely retractable, and the cam 9 is fitted into the space of the control member 7 formed in a substantially U-shape, and both are coaxially separated from the case 2. A locking member 6 provided integrally with the latch 1
comes into contact with the upper side 7a of the control member 7, and the latch 1
At the same time, the upper side 7a of the control member 7 engages with the locking portion 6b provided on the locking member 6, and the upper side 7a comes into contact with one end 9b of the cam 9, so that the control member 7 is prevented from protruding. The counterclockwise rotation is restricted, and the rear end of the trigger 12, which is provided so as to be freely retractable and protrude into the case independently of the latch, is brought into contact with the other end 9a of the cam 9, and as the trigger 12 retreats, The cam 9 is provided to rotate counterclockwise against the spring 11, and when the trigger 12 is retracted, only the cam 9 rotates, and only when the trigger 12 and the latch 1 are retracted at the same time, the control member 7 is rotated. The rotation becomes movable, and the restriction on the protrusion direction of the latch 1 is released by the rotation of the control member 7, and the amount of protrusion of the latch becomes larger than the initial state, resulting in a dead bolt state. Features a door lock.