JP3185594U - Thumb turn lock device - Google Patents

Abstract

A thumb turn lock device that can be easily attached to a door knob used to prevent an intruder from unlocking at home.
A thumb turn lock device (1) detachably attachable to a door knob (2) having a cylinder lock that can be locked / unlocked by a thumb turn (3) from the indoor side, and a mounting part (10) for detachably pinching a shaft (4) of the door knob (2). And a fixed arm 20 which is attached to the mounting portion 10 so as to be rotatable about the mounting end portion 21 and which fixes the thumb turn 3 to the locking position.
[Selection] Figure 1

Description

  The present invention relates to a thumb turn lock device that can be detachably installed on a door knob with a thumb turn and that prevents the key from being opened and closed by fixing the thumb turn.

  Patent Document 1 (Japanese Utility Model Publication No. 62-14061) discloses that a lock lever is embedded in the outer periphery of a door knob with a thumb turn so as to be freely fitted along the axial direction of the door knob, and the end of the lock lever on the front end side of the door knob. A locking groove is provided in either one or both of the thumb turn and the lock lever so that the thumb turn and the lock lever are fitted to each other when the lock lever is pivoted and intersects with the thumb turn. A double lock device is disclosed. Therefore, if you are staying indoors, you can turn the lock lever and insert it into the thumb turn so that if the suspicious person tries to unlock the lock using the key from the outside, the thumb turn will not rotate. Can be prevented.

  Patent Document 2 (Japanese Utility Model Publication No. 6-20811) discloses a hook-shaped portion (thum turn) provided on an operation tab and a groove that is rotatably connected to a side surface of a door frame and engages with the hook-shaped portion of the operation tab. A safety locking mechanism is disclosed that includes a gutter means having a gutter member having a hole. As a result, when staying in the room, the thumb turn is fixed by the hook member rotatably provided on the base plate fixed to the side surface of the door frame. Since the thumb turn does not rotate when trying to release the key, the key can be prevented from being released.

  Patent Document 3 (Utility Model Registration No. 3039389) discloses a door knob fixture that locks from outside the house or room using a door knob fixture of a different mechanism other than the door key. This fixture can be attached to the side of the door to securely fix walls and fixtures, and is movable and can be stored in the side box when not in use, such as at home or in the room. It has become.

  Patent Document 4 (Japanese Patent Laid-Open No. 2002-327561) discloses a door unlocking alarm device that senses an illegal door unlocking operation from the outside at an early stage and issues an alarm during the unlocking operation. This door unlocking alarm device incorporates a grooved rotor that engages with the thumb turn in the alarm device case fitted to the door knob, and detects the angle difference by comparing the rotation angle of the rotor with the door knob rotation angle or the door fixing part. A switch is provided in the case, and a circuit and an alarm for issuing an alarm when the detection switch detects an angle difference greater than a set value are incorporated in the case.

Japanese Utility Model Publication No. 62-14061 Japanese Utility Model Publication No. 6-20811 Registered Utility Model No. 3039389 JP 2002-327561 A

  As described in the above-mentioned patent documents, in recent years, it has been required to prevent illegal intruders having a key and unauthorized intruders having a key opening technique. For this reason, Patent Document 1 has a structure in which a lock lever is fitted and fixed to the thumb turn, but there is a problem in that it is expensive because the doorknob itself needs to be replaced with that of the structure.

  In the safety lock mechanism disclosed in Patent Document 2, since the base plate is fixed to the side surface of the door frame with an adhesive or a screw, there is a problem that it cannot be attached without permission outside the home, and the door knob has a problem with the thumb turn. There is a problem that alignment is difficult.

  Since the door knob fixing tool disclosed in Patent Document 3 requires a space for arranging the side box in the vicinity of the door, there arises a problem that it cannot be attached to a door having no space.

  From the above, the present invention can be easily attached to a doorknob used to prevent unauthorized intruders who have a lock key or unauthorized intruders who can unlock them from being unlocked at home. Provide a thumb turn lock device.

  Accordingly, the thumb turn lock device according to the present invention is a thumb turn lock device that is detachable from a door knob having a cylinder lock that can be locked / unlocked by a thumb turn from the indoor side, and the shaft of the door knob is detachably sandwiched. A mounting portion and a fixing arm that is rotatably attached to the mounting portion and fixes the thumb turn in a locked position.

  As a result, the mounting portion is detachable with respect to the shaft of the doorknob, so the mounting portion can be mounted on the doorknob when necessary, and the thumb turn in the locked position can be fixed by the fixing arm. It is possible to lock the rotation of the thumb turn without adding a special structure around the door.

  The mounting portion includes a pair of sandwiching portions that sandwich the shaft of the door knob, a pair of lever portions that are connected to each of the sandwiching portions via a fulcrum, and that opens and closes the sandwiching portion, and the pair of lever portions. And an urging means for urging the sandwiching portion in a closing direction.

  Accordingly, the pair of sandwiching portions can be opened by gripping the pair of lever portions, and can be easily mounted on the shaft of the door knob.

  Further, the fixed arm has a mounting end rotatably mounted on a support portion provided at one of the sandwiching portions of the mounting portion, and an extension extending from the mounting end toward the front surface of the door knob. It is desirable that the arm portion and a fixing portion extending from the extended arm portion along the front surface of the door knob and having a meshing gap with which the thumb turn meshes are formed.

  In this way, after mounting on the shaft of the door knob, the fixed arm is rotated with the mounting end as a fulcrum, and the thumb turn is engaged with the engagement gap of the fixed portion formed at the distal end of the fixed arm and fixed. It is.

  Furthermore, it is desirable that a high friction member is disposed on a portion of the sandwiching portion that contacts the shaft of the door knob. The high friction member is preferably rubber, synthetic resin or the like.

  As a result, the grip force of the sandwiching portion can be improved, so that the thumb turn can be reliably locked.

  As described above, according to the present invention, it is easy to attach to and detach from the door knob, and it is possible to lock the rotation of the thumb turn with a simple structure. It is possible to prevent intruders from entering due to illegal unlocking. Moreover, since there is no fixing to the frame and wall around the doorknob, there is an advantage that permission to the owner of the room is unnecessary.

It is explanatory drawing which showed the state which mounted | wore the thumb turn lock apparatus based on the Example of this invention. It is the top view which showed the state with which the thumb turn lock apparatus based on implementation to this invention was mounted | worn. It is a top view of the thumb turn lock device concerning the example of the present invention. It is a front view of the thumb turn lock device concerning the example of the present invention.

  An embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIGS. 1 and 2, the thumb turn lock device 1 according to the present invention is detachable from a shaft 4 of a door knob 2 having a cylinder lock that can be locked / unlocked by a thumb turn 3 from the indoor side. The thumb turn lock device 1 includes a mounting portion 10 that detachably holds the shaft 4 of the door knob 2, and a fixing arm 20 that is rotatably attached to the mounting portion 10 and fixes the thumb turn 3 to a locked position. Consists of.

  The mounting portion 10 is connected to a pair of sandwiching portions 11 and 12 for sandwiching the shaft 4 of the door knob 2 and the sandwiching portions 11 and 12 via fulcrums 13 to open and close the sandwiching portions 11 and 12. A pair of lever portions 14 and 15 and biasing means, such as a spring 16, provided on the pair of lever portions 14 and 15 and biasing the sandwiching portions 11 and 12 in the closing direction are configured. Further, the one sandwiching portion 11 and the one lever portion 14 are integrally formed of synthetic resin or the like, and at the same time, the other sandwiching portion 12 and the other lever portion 15 are also integrally formed of synthetic resin or the like. .

  The fixed arm 20 includes a mounting end 21 that is rotatably mounted on a support portion 17 provided on one of the sandwiching portions 11 and 12 of the mounting portion 10 (for example, 11), and the mounting end 21 from the mounting end 21 An extending arm portion 22 extending toward the front surface of the door knob 2, and a fixing portion 23 extending from the extending arm portion 22 along the front surface of the door knob 2 and having a meshing gap 24 with which the thumb turn 3 meshes. Consists of. Moreover, since this fixed arm 20 needs a predetermined | prescribed intensity | strength, it is desirable that it is metal. Further, the fixing portion 23 of the fixing arm 20 is preferably bent so as to correspond to the shape of the surface on which the thumb turn 3 on the front surface of the door knob 2 is disposed, and further, the fixing portion 23 is predetermined so as to fit into the front surface of the door knob 2. It is desirable to have an elastic force of Further, in this embodiment, the support portion 17 is cantilevered, but the support portion 17 may be supported from both sides.

  Furthermore, a high friction member 30 made of rubber, synthetic resin, or the like having a high frictional force is disposed on a portion of the sandwiching portions 11 and 12 that is in contact with the shaft 4 of the door knob 2, that is, an inner peripheral surface.

  In the thumb turn lock device 1 configured as described above, when a resident is at home or in the room, the holding portions 11 and 12 are opened by grasping the lever portions 14 and 15 to be mounted on the shaft 4 of the door knob 2, and the fixed arm The thumb turn 3 moved to the locking position by moving 20 is sandwiched and fixed by the meshing gap 24. As a result, even if an attempt is made to turn the key from the outside, the rotation of the thumb turn 3 is hindered, so that unlocking cannot be performed and entry into the room can be prevented.

  As described above, the thumb turn lock device 1 according to the present invention can be easily attached to and detached from the door knob 2 and can lock the rotation of the thumb turn 3 with a simple structure. In addition, it is possible to prevent a suspicious person from invading by turning the thumb turn or illegally unlocking. Moreover, since there is no fixation to the frame and wall around a doorknob, there exists an advantage that the permission to the owner of the room is unnecessary.

  In the embodiment described above, the fixed arm 20 is formed of a metal wire or a metal rod, but may be formed by bending a metal plate.

DESCRIPTION OF SYMBOLS 1 Thumb turn lock device 2 Door knob 3 Thumb turn 4 Shafts 11 and 12 Clamping part 13 Supporting points 14 and 15 Lever part 16 Spring 17 Supporting part 20 Fixed arm 21 Mounting end part 22 Extension arm part 23 Fixed part 24 Interlocking gap

Claims (4)

A thumb turn lock device that is detachable from a door knob having a cylinder lock that can be locked / unlocked by thumb turn from the indoor side,
A mounting part for detachably sandwiching the doorknob shaft;
A thumb turn lock device, wherein the thumb turn lock device is rotatably attached to the mounting portion and is constituted by a fixing arm for fixing the thumb turn to a locked position.   The mounting portion is provided with a pair of sandwiching portions that sandwich the shaft of the doorknob, a pair of lever portions that are connected to each of the sandwiching portions via a fulcrum, and that opens and closes the sandwiching portion, and the pair of lever portions. The thumb turn lock device according to claim 1, further comprising: an urging unit that urges the pinching portion in a closing direction.   The fixed arm includes a mounting end portion that is rotatably mounted on a support portion provided on one of the sandwiching portions of the mounting portion, and an extending arm portion that extends from the mounting end portion toward the front surface of the door knob. The thumb turn lock according to claim 1, wherein the thumb turn lock is configured to extend along the front surface of the door knob from the extended arm portion and to be formed with a meshing gap in which the thumb turn is meshed. apparatus. The thumb turn lock device according to claim 2, wherein a high friction member is disposed at a portion of the sandwiching portion that contacts the shaft of the door knob.

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