JPH0317014Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an improvement in a locking device for a door.

In a lock device in which a dead bolt is moved in and out by an operating member that is swung by a key or a thumb turn, in order to provide a click feeling when the dead bolt is extended and retracted,
A device in which a plate-shaped spring is brought into contact with a part of the operating member is conventionally known. This type of position confirmation mechanism has a weak click feeling (the click of a key or thumb turn by hand), which weakens even more with long-term use, and the oscillation (rotation) of the operating member may not be smooth. This poses problems such as making some sacrifices.

This devised door locking device was proposed with the aim of solving the above-mentioned problems, and is linked to a dead bolt and has an operating member that is swung by a key or a thumb turn when the dead bolt is protruded. and a cam piece with corresponding parts when stored, and a proximal end of a positioning lever having a trochanter at the tip is pivotally attached to a part of the case close to the cam piece, and the positioning lever is It is characterized by being biased by a spring so that the trochanter at the tip always comes into contact with the cam piece.

This invention will be explained below based on embodiments shown in the drawings.

Each member of the door lock device of this invention is usually made of metal such as brass or iron, or hard synthetic resin.

In the drawings, 1 is a case of the locking device according to the invention, 1a is a front plate forming a part of the case 1, 1b is a mounting hole into which a cylinder lock (not shown) or the like is fitted, and 2 is a door to which the case 1 is attached. are shown respectively.

Reference numeral 3 denotes an operating member pivotally attached to the case 1 near the mounting hole 1b, which swings in the direction of arrow P via the linking rod 4 when a key inserted into a cylinder lock or the like is rotated. (rotated). Further, the action member 3 is similarly swung by a thumb turn (not shown). 5 indicates the square shaft of the thumb turn inserted into the hole provided in the working member 3. A driven piece 7 is located behind the dead bolt 6 that protrudes into and out of the front plate 1a.
is fixed with a pin 8 or the like, and an engaging rod 3a provided on the aforementioned operating member 3 is loosely fitted into a cam hole 7a provided in the driven piece 7. Therefore, when the action member 3 is swung (rotated) in the direction of the arrow P using the key or thumb turn, the driven piece 7 will slide over a distance l along with the dead bolt 6, and the dead bolt 6 will move. The illustrated state is the closed position (protruding state) or the open position (storage state). During the sliding displacement, the driven piece 7 is fixed to the case 1 by the guide piece 9 whose upper end side is fixed to the case 1, and the elongated hole 7b provided in the driven piece 7 is fixed to the case 1. They are each guided by guide rods 10.

In this invention, a cam part 11 is provided at a part of the above-mentioned operating member 3, that is, at the base end, which corresponds to when the dead bolt 6 is extended and when it is retracted.
will be established. The cam piece 11 can be formed integrally with the working member 3 or separately, and has regions 11a, 11b corresponding to the closed and open positions of the dead bolt 6, ie the working member 3, respectively. In the illustrated example, the contact portion 11a in the closed position
is formed of a protrusion, and the abutting portion 11 in the open position
b is formed by a recess. A base end portion of a positioning lever 12 having a roller or other roller 13 at its tip is pivotally attached to a portion of the case 1 close to the cam piece 11. This positioning lever 12 is biased by a torsion spring or other spring 14 so that the trochanter 13 at its tip always comes into contact with the cam piece 11 of the operating member 3.

In the figure, 15 is a latch, 15a is a support member assembled to the latch 15, 16 is a guide piece that slidably holds the latch 15 and the support member 15a together with the guide hole 1c provided in the front plate 1a, and 17 is a support member assembled to the latch 15. ,
A compression spring is provided between the latch 15 and the guide piece 16, and urges the latch 15 to normally protrude from the front plate 1a.A shaft 19 of a knob or other handle (not shown) is inserted into the compression spring 18. hub,
Reference numeral 20 indicates the hub 18 and the rear piece 1 of the support member 15a.
5b, 21 is a pivot of the swinging piece 20, 22 is a return spring, and 23 is a stopper of the swinging piece 20 when the support member 15a is displaced backward by a distance m by the handle. It is. These constitute a latch actuation mechanism related to the action of the latch 15, which is conventionally known, but in the illustrated example, when the dead bolt 6 is protruded and held in the closed position, a portion 7c of the driven piece 7 behind it is the latch support member 1
The latch 15 is kept stationary in the protruding state by abutting against a part 15c of the part 5a, but the structure of this part is not relevant to the present invention.

According to the door lock device of this invention described above, the operating member 3 can be locked by the key or thumb turn.
When the dead bolt 6 is moved in and out by swinging,
Predetermined portion 11 of the cam piece 11 provided on the action member 3
Since the trochanter 13 of the positioning lever 12, which is biased by the spring 14, contacts a and 11b reliably and stably, it not only provides a sufficient click feeling to the human fingers, but also provides a comfortable feel for long-term use. This has the effect that the click feeling does not weaken even when it is worn. In addition, since the positioning lever 12 is brought into contact with the cam piece 11 of the operating member 3 which swings through the trochanter 13 at its tip, it has the advantage that it can be operated extremely smoothly with a key or thumb turn. be.

[Brief explanation of the drawing]

The drawing is a side view of the door locking device of this invention with a part of the case side plate cut away. DESCRIPTION OF SYMBOLS 1... Case, 3... Acting member, 6... Dead bolt, 11... Cam piece, 12... Positioning lever, 13... Trochanter, 14... Spring.

Claims (1)

[Scope of utility model registration request] A portion 1 corresponding to the action member 3 connected to the dead bolt 6 and swung by a key or a thumb turn corresponds to when the dead bolt 6 is extended and when it is retracted, respectively.
1a and 11b is provided, and a positioning lever 12 having a trochanter 13 at the tip is provided in a portion of the case 1 close to the cam piece 11.
A locking device for a door, characterized in that the base end of the positioning lever 12 is pivotally mounted, and the positioning lever 12 is biased by a spring 14 so that the trochanter 13 at the tip always comes into contact with the cam piece 11.