JPS603899Y2 - Latch direction change device for door locks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for changing the direction of a latch in a door lock.

With conventional door locks, the entire lock case had to be replaced in order to change the direction of the latch bolt to open to the right or to the left, which was expensive and the replacement operation was complicated. .

In view of the problems of conventional door locks, the present invention provides a door lock that allows only the latch to change direction without having to replace the entire lock case.

By making it possible to change the direction of the latch without changing the lock case, the direction of the latch can easily correspond to the left-right opening door, thereby contributing to cost reduction.

Embodiments of the present invention illustrated in the drawings will be described below.

■ 1 is the locking member, which is made of synthetic resin to provide cushioning properties.
The locking member 1 is made of rubber or the like and is movably fitted onto the support shaft 4 of the latch 3, and the ends 2 on both sides of the locking member 1 are inserted into the holes 6 of the lock box 5.

(FIG. 2) The hole 6 of the lock box 5 is made long enough to allow the tips 2 at both ends of the locking member 1 to move a little.

The buffer spring 7 is inserted between the guide plate 8 of the latch support shaft 4 provided upright on the lock box 5 and the locking member 1, and causes the locking member 1 to spring toward the rear side of the lock box.

The buffer spring 7 requires a stronger elastic force than the hub biasing spring 10.

The hub 9 has a hole 11 through which the shaft 17 of the handle is inserted, and is elastically biased in the direction of arrow A by a hub biasing spring 10, so that the protruding piece 12 of the hub 9 engages with the end surface 1-1 of the locking member 1.

A pressing member 13 is fixed to the rear end of the support shaft 4 of the latch 3, and is pressed rearward when the hub 9 rotates, so that the latch 3 is retracted.

The latch spring 15 is a spring that constantly presses the latch bolt 3 to protrude from the lock box 5.

The bush 16 is used to guide the latch 3 and to prevent the noise generated when the bush 16 moves in and out.

When the hub 9 is now rotated with the handle, the protruding piece 12 of the hub 9 presses the pressing member 13, causing the latch 3 to be retracted into the lock box 5.

When the handle is released from the hand, the hub 9 returns to its original position due to the elasticity of the hub biasing spring 10, but at this time the protruding piece 12 collides with the end face 1-1 of the locking member 1 with force.

The locking member 1 is inserted so that its protrusion 2 can move slightly within the hole 6 of the lock box 5, and the buffer spring 7 prevents the collision between the locking member 1 and the protrusion 12. As a result, it compresses and flexes, absorbing the impact with the locking member 1 when the hub 9 returns.

- Since the force-retaining member 1 itself has a buffering effect due to its constituent materials and moves a little within the hole 6, in the case of a weak impact, it is possible to absorb the impact only with the locking member 1. .

■ In this invention, the rotation shaft 21 is located below the latch support shaft 4.
A fixed lever 20 is attached which is rotatable about the center.

Further, a front plate 19 is removably attached to the front surface 24 of the lock box with attachment screws 23.

Further, a hole 25 is bored in the front surface 24 of the lock box at a position corresponding to the lower end 20b of the fixed lever 20.
0 is biased in the direction of arrow B in FIGS. 1 and 4 by a fixed lever biasing spring 22.

In the "normal state" in which the latch 3 protrudes as shown in FIG.
0a protrudes between the guide piece 8 and the locking member 1.

Therefore, after the protruding piece 12 of the hub 9 presses the pressing piece 13 and the latch 3 is retracted from the front surface 24 of the lock box, the hub 9 is returned to its original position by the hub biasing spring 10 and attached to the locking member 1. collide.

At this time, the locking member 1 can only move a short distance until it locks on the upper end 20a of the fixed lever 20.

By the way, when it is desired to change the direction of the latch 3, the direction of the latch 3 is changed as follows.

■ First, remove the mounting screws 23 from the top plate 19 and attach the lock box front 2.
Remove from step 4.

Then, the fixed lever 20 rotates about the shaft 21 in the direction of arrow B (FIG. 1), and its lower end 20b touches the front surface 24 of the lock box.
As a result, the upper end 20a of the fixed lever 20 moves downward and comes out from between the locking member 1 and the guide piece 8, and the locking member 1 becomes movable toward the front surface 24 of the lock box.

The upper end 20a comes out from the front surface of the locking member 1.

■ Next, when the hub 9 is rotated in the direction of arrow A in FIG. moves forward due to the stretching force of

At this time, the pressing plate 13 also moves along with the protruding piece 12 of the hub 9.

The latch bolt 3 thus protrudes from the front surface 24 of the lock box and is exposed to the outside.

(2) Next, the latch support shaft 4 is rotated 180 degrees to change the direction of the latch 3 that is integrated with the latch support shaft 4.

At this time, the latch 3 is pulled out from the bush 16, so the latch support shaft 4 is rotatable.

(2) Next, when the rotation of the hub 9 is released, the hub 9 returns from the position shown in FIG. 4 to the position shown in FIG. 1.

In this way, the latch support shaft 4 also moves back, and the latch 3 also returns to its original position.

At this time, the latch spring 15 is compressed and the buffer spring 7 is expanded.

As a result, a gap is created between the locking member 1 and the guide piece 8.

■ Next, attach the top plate 19 to the front surface 2 using the mounting screws 23.
4, the lower end 20b of the fixed lever 20 is retracted into the front surface 24 of the lock box and rotates about the shaft 21.

Thus, its upper end 20a projects to the front of the locking member 1,
The state shown in Figure 1 will be reached.

Effects of the present invention: Due to the top plate 19, the upper end 20a of the fixing lever 20 protrudes to the front of the locking member 1, and even if the hub 9 is rotated in the direction of arrow A, the latch 3 cannot be moved toward the front surface. When changing the direction of the latch 3, remove the fixing plate 19 and rotate the hub 9 at the required angle in the direction of arrow A. The entire latch 3 will be exposed in front of the front surface 24, making it possible to change the direction. .

That is, this has an excellent effect in that the direction of the latch 3 can be easily changed by simply removing the top plate 19 and slightly rotating the handle in the direction opposite to the side on which the door is opened and closed.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figure 1: 2. Front sectional view of the device of the present invention; Figure 2: Figure 1 n-n
Sectional view, FIG. 3: A view taken along the line IV-IV in FIG. 1, FIG. 4: A front sectional view of the device of the present invention when the fixing plate 19 is removed. 1... Locking member, 2... Both ends of locking member 1, 3... Latch, 4... Latch support shaft, 5... Curved... Lock box, 6... Lock box hole, 7... Buffer spring, 8... Guide plate for spindle 4, 9... Hub , 10... Hub biasing spring, 11... Insertion hole of handle shaft 17, 12... Protrusion piece of hub 9, 13... Pressing plate, 14... ...(missing number), 15...Latch spring, 16...Latch bolt 3 bushing, 17...Handle shaft, 19...
・Top plate, 20... Fixed lever 21...
・Fixed lever rotating shaft, 22...Fixed lever biasing spring, 23...Fixed plate mounting screw, 24.
...Front side of the lock box, 25...Hole on the front side of the lock box.

Claims (1)

[Scope of Claim for Utility Model Registration] The latch support shaft 4 is inserted into the guide plate 8 fixed to the lock case 5, and the locking member 1 is inserted into the latch support shaft 4, and the locking member 1 and the guide are inserted into the latch support shaft 4. A buffer spring 7 is wound between the plates 8, and a latch spring 15 is wound between the guide plate 8 and the latch 3. It is inserted into a hole 6 of a lock box 5 that is long in the direction of the latch support shaft 4, and is movable in the direction of the latch support shaft 4. Furthermore, a top plate 19 is removably attached to the front surface 24 of the lock box, while a top plate 19 is rotatable about a shaft 21 fixed to the lock box 5 below the latch support shaft 4. , fixed lever biasing spring 22
This door lock is provided with a fixing lever 20 whose lower end 20b is urged to protrude to the front surface 24 of the lock box due to the elasticity of When pressed, the upper end 20a protrudes between the locking member 1 and the guide plate 8, and the hub 9
When the top plate 19 is removed from the front surface 24 of the lock box, the lower end 20b of the fixed lever 20 protrudes from the front surface 24 of the lock box, and the upper end 20a of the locking member 1 The latch spring 15 is released from between the latch spring 15 and the guide plate 8, and moves the hub 9 against the buffer spring 7 until the locking member 1 collides with the guide plate 8.
A latch direction changing device for a door lock, characterized in that the latch shaft 4 is moved forward until the entire latch 3 is exposed from the front face 24 of the lock box by the tension of the latch 3.