JP3019380U - Door lock - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] When the door is closed, the locking rod can be reliably projected and locked by the attractive force of the permanent magnet. The lock rod does not protrude even if the hand is released from the handle during the opening of the door. [Structure] A lock rod 1 which is always urged in a backward direction via an operating rod 2 is provided in a lock case 5 so as to be retractable and retractable by rotation of a hub 4. A permanent magnet is provided, and a second permanent magnet is provided on the receiving metal 8, and when the door is closed, the operating rod 2 is rotated by the attraction force of the permanent magnets so that the locking rod 1 is operated to project.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a door lock, and in particular, a lock rod that is normally urged in the backward direction is projected and locked by the attraction force of permanent magnets when the door is closed.

[0002]

[Prior art]

 Conventionally, as this kind of door lock, there is one described in Japanese Patent Publication No. 50-2439. In the above conventional one, the lock rod is always biased in the protruding direction, and the lock rod retracted by the operation of the handle is in the retracted state by locking the locking rod to the lock rod in the retracted state. To hold. Then, when the door is closed, the locking rod is rotated by the attractive force of the permanent magnet provided on the frame and the permanent magnet provided on the locking rod to release the locking between the locking rod and the locking rod. The rod is projected and locked.

[0003]

[Problems of conventional technology]

 In the above-mentioned conventional one, the lock rod is held in the retracted state against the biasing force in the protruding direction biased by the lock rod by the lock rod locked to the lock rod, and the attraction force of the magnet is applied. The locking rod is released by the lock lever so that the locking rod is projected.However, due to its structure, a large force acts on the locking portion between the locking rod and the locking rod, so the force required to unlock the locking rod is considerably large. Needed Moreover, the frictional resistance of the locking part is also a major factor, and the locking force varies considerably, and depending on the surface condition of the locking part, it may not be possible to release the locking by the attractive force of the magnet. There were many. Also, when the pivot shaft of the locking rod is rotated by the handle in the closed state, the locking rod is unlocked from the locking rod, so the magnet on the frame side and the magnet provided on the locking rod are It is rotated by the suction force of and is held in a state where the lock with the locking rod is released. For this reason, the lock rod is always in a state where it can be projected, and if you release your hand from the handle while the door is being opened, the lock rod will protrude and come into contact with the frame, damaging the lock rod and the frame, resulting in malfunction of the lock. There was the inconvenience of getting up. Further, depending on the timing, the locking rod and the locking rod may not be properly engaged with each other when the door is opened and the handle is released.At that time, if the locking rod protrudes and the door is closed as it is. There was also the inconvenience that the lock rod crashed into the frame.

[0004]

[Problems to be solved by the device]

 The present invention focuses on the above-mentioned conventional problems, and when the door is opened, the lock rod is securely held in the retracted state, and when the door is closed, the lock rod is surely projected and locked, and the handle is operated. When the lock rod is once retracted, the lock rod is surely held in the retracted position to solve all the above-mentioned conventional problems.

[0005]

[Means for solving the problem]

 In order to solve the above problems, the door lock of the present invention is always urged in the backward direction through the operating rod, and the lock rod retracted through the hub by the operation of the handle appears and disappears in the lock case. A first permanent magnet is integrally provided on the front side of the actuating rod, and a second permanent magnet is provided on a frame or a seat facing the first permanent magnet when the door is closed. A magnet is provided so that when the door is closed, the attraction force of the first permanent magnet and the second permanent magnet overcomes the biasing force of the operating rod in the backward direction of the locking rod and causes the locking rod to project. It is characterized by having done.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1 to 3, reference numeral 1 denotes a lock rod, which is provided inside the lock case 5 so as to be self-immersible from a front plate 51 on the front surface of the lock case 5. Reference numeral 2 is an operating rod, which is rotatably supported by the lock case 5 by a shaft 22 and is constantly urged by a spring 3 in the clockwise direction in FIG. The operating portion 21 at the tip of the operating rod 2 is engaged with the engaging concave portion 11 of the locking rod 1, and the biasing force of the spring 3 of the operating rod 2 constantly urges the locking rod 1 in its backward direction. Reference numeral 6 is a first permanent magnet integrally provided on the front plate 11 side of the operating rod 2.

Reference numeral 4 denotes a hub for operating the lock rod 1, which has a conventionally known structure. By the way, the rotating shaft 42 is rotatably supported by the lock case 5, and the operating shaft 9 of the handle is inserted into a square hole formed through the central portion of the rotating shaft 42. Reference numeral 44 denotes a spring suspended between the lock case 5 and the hub 4, which constantly urges the hub 4 counterclockwise. Reference numeral 53 denotes a column fixed to the lock case 5, and the contact portion 43 of the hub 4 contacts the column 53 to prevent the spring 44 from rotating further.

Further, the operating portion 41 provided on the hub 4 is engaged with the engaging projection 12 provided on the rear end portion of the lock rod 1, and the hub 4 is resisted against the urging force of the spring 44 by the operation of the handle. The lock rod 1 is retracted against the urging force of the lock rod 1 in the protruding direction by the attractive force of the permanent magnet 6 provided on the actuating rod and the permanent magnet 7 provided on the receiving fitting 8 described later. Activate. (FIG. 2) At this time, the abutment portion 46 provided on the hub 4 abuts the column 53 provided on the lock case 5 and prevents further rotation.

Reference numeral 8 denotes a receiving metal member fixed to the frame side, which includes a receiving plate 81 and a box receiving member 82, and is attached to the first permanent magnet 6 provided on the operating rod 2 in the lock case 5. A second permanent magnet 7 is provided at the opposite position. The second permanent magnet 7 is fitted into the recess of the box receiver 82 and is held by the receiving plate 81 fixed to the box receiver 82 with screws 84 and 85. The screws 85, 85 not only fix the box receiver 82 and the receiving plate 81, but also serve as mounting screws for the receiving fitting 8. Reference numeral 83 is an engaging hole of the lock rod 1 provided in the receiving fitting 8.

In the other figures, 52 is a guide member of the lock rod 1 provided on the front plate 51 of the lock case 5. Reference numeral 54 is a guide hole provided in the lock case 5 for guiding the projection 12 provided at the rear end of the lock rod 1. 55, 55 are holes for inserting a mounting post (not shown) of the handle seat. Reference numerals 57 and 57 denote columns with screw holes fixed to the lock case 5 for fixing a cover (not shown) of the lock case 5 with screws. A screw hole may be provided in the pivot shaft 22 of the operating rod 2 or the column 53 for contacting the hub 4, and the cover of the lock case 5 may be fixed with a screw here as well. Further, reference numeral 45 is a long hole provided in a direction extending in a circumferential direction around the rotation shaft 22 of the hub 4, and when the hub 4 is rotated, a handle seat is inserted into the hole 55 of the lock case 5. The attached columns do not interfere with the rotation.

[00011]

[Action]

 FIG. 1 shows a closed state, in which the first permanent magnet 6 provided on the operating rod 2 in the lock case 5 is opposed to the second permanent magnet 7 provided on the bracket 8 attached to the frame. Then, the actuating rod 2 is rotated counterclockwise in FIG. 1 against the heat applied by the spring 3 by the attraction force of the permanent magnets 6, 7. Due to the action of the engaging recess 11 of the locking rod 1 with which the operating portion 21 at the tip of the operating rod 2 engages due to the rotation of the operating rod 2, the locking rod 1 is projected into the engaging hole 83 of the bracket 8. Engage and lock.

To unlock the door, as shown in FIG. 2, a handle (not shown) is rotated clockwise, and the hub operating shaft 9 is rotated clockwise by the handle shaft 9 of the handle. By the rotation of the hub 4, the locking rod 1 is moved by the action of the projection 12 of the locking rod 1 which engages with the operating portion 41 of the hub 4, and the locking rod 1 is locked by the operating rod 2 by the attraction force of the permanent magnets 6 and 7. Retract against the urging force of 1 in the protruding direction. Then, just open the door.

After the door is opened, when the hand is released from the handle, the hub 4 returns to the original state (of FIG. 1) by the urging force of the spring 44, as shown in FIG. (The handle is also integrally rotated through the operation shaft 9 to return to the original state.) When the door is opened, the handle is provided at a position facing the first permanent magnet 6 provided on the operating rod 2. Since the second permanent magnet 7 provided on the metal fitting 8 disappears, the attraction force between the permanent magnets does not act. Therefore, only the biasing force of the spring 3 in the clockwise direction of the operating rod 2 acts on the operating rod 2, so that the lock rod 1 is held in the retracted state of FIG. 3 by the biasing force of the operating rod 2. To be done. In this opened state, the lock rod 1 is not projected.

When the door is opened and the door is completely closed, as shown in FIG. 1, the second permanent magnet 6 provided on the receiving metal fitting 8 is opposed to the first permanent magnet 6 provided on the operating rod 2. Since the permanent magnets 7 are located, the attraction force of the permanent magnets overcomes the urging force of the spring 3 of the operating rod 2 to rotate the operating rod 2 in the counterclockwise direction so that the locking rod 1 is projected. Then, the lock rod 1 is locked by being engaged with the engagement hole 83 of the receiving fitting 8.

[00015]

[Other Examples]

 In the embodiment shown in FIGS. 1 to 3, the lock rod 1 is biased in the backward direction by the winding spring 3 suspended on the operating rod 2 and is acted via the operating rod 2. The spring is not limited to the winding spring, and a compression spring or a tension spring may be suspended on the operating rod 2. Further, the structure of the hub 4 for retracting the locking rod 1 by operating the handle adopts a structure for a lever handle that allows the hub to rotate only in one direction, but for a knob for rotating the hub in both directions. A hub configuration can also be used.

In addition, in order to strengthen the attraction force of the permanent magnets 6 and 7, the front plate 51 of the lock case and the receiving plate 81 of the receiving bracket 8 may be provided with appropriate openings at positions corresponding to the permanent magnets. You can also

[00017]

[Effect of device]

  When the door is completely closed, the lock rod is made to project by the attraction force of the permanent magnets that overcome the biasing force in the retracting direction against the lock rod, so it is based on the magnetic force of the permanent magnet used. Therefore, it is possible to accurately design the above relationship. (Note that the magnetic force must be based on the limit value of the magnetic force when the limit of the gap size (dust size) between the door and the frame is set within, for example, 6 mm.) That is, the door is completely closed and locked. It is possible to provide a door lock in which the rod can surely protrude.

[00018] When the lock rod is retracted by operating the handle and the door is opened, the distance between the magnets increases, and the attraction force (projection force) that overcomes the biasing force of the lock rod in the backward direction does not act. Therefore, the lock rod is securely held in the retracted state. Therefore, the lock rod does not project except when the door is completely closed, so the door is accidentally closed when the lock rod is projecting, and no accident such as breakage or damage of the lock rod or the frame occurs.

In addition, since the locking rod does not come into contact with the receiving metal fitting and slide back when the door is closed, there is no resistance and the door can be closed lightly. The weak force of the closer does not cause problems such as the door not closing completely.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a door lock according to the present invention, showing a closed and locked state.

FIG. 2 shows the state in which the lock rod is retracted by operating the handle.

FIG. 3 shows an open state of the same.

[Explanation of symbols]

 1. Lock bar 2. Actuating rod 3. Spring 4. Hub 5. Lock case 6,7. Permanent magnet 8. Bracket

Claims (1)

[Scope of utility model registration request] 1. A lock rod that is constantly urged in a backward direction via an operating rod and retracted via a hub by a handle operation is provided in a lock case so as to be retractable and retractable. A permanent magnet is integrally provided, and a second permanent magnet is provided on a frame or a seat on the side facing the first permanent magnet when the door is closed, and the first permanent magnet and the second permanent magnet are provided when the door is closed. A door lock configured to overcome the biasing force in the retreating direction by a suction force with a magnet so that the locking rod is projected and locked.