JPS5814201Y2 - door lock - Google Patents

Description

[Detailed description of the invention] This invention relates to a door lock in which the latch bolt moves in and out in conjunction with the rotation of the handle. Conventional door locks of this type generally slide in the direction in which the latch bolt moves in and out. It is possible to have a tractor, and this retractor is slid backward by an operating arm of a hub linked to a handle, thereby retracting the latch bolt. The object of the present invention is to provide a door lock in which the latch bolt is retracted by a tractor so that the depth dimension of the entire door lock can be made as small as possible. To provide a door lock that minimizes the space occupied in the lock of a retractor in a retractor, and allows space for the insertion hole for the mounting leg even when using a joint plate with legs for attaching the handle. Furthermore, if a rotatable latch bolt is used to create a door lock that is so-called left- or right-handed, and can be opened inward or outward, there will be no hindrance. It is intended to provide door locks that can be obtained.

The drawing shows one embodiment of the door lock according to this invention.
is a latch bolt that is provided so as to be retractable from the lock case 2, and a spring 6 fitted to a guide rod 5 having a receiving part 4 that is in contact with the rear wall of the lock case is attached to the hollow part 3, so that the latch bolt is always extended in the protruding direction. It is given an elasticity of .

Reference numeral 7 denotes a latch guide which is removably fitted into the small diameter portion 8 of the latch bolt 1 at a U-shaped notch 9, and the bent portion 10 at one end is brought into contact with a guide wall 11 erected on the bottom wall of the lock case.

12 is a notch formed in the guide wall 11 for inserting the latch bolt, and 13 is a protruding piece of the latch guide 7, which fits into a long part provided on the case lid (not shown) to guide the sliding movement of the latch bolt 1. I'm letting you do it.

The latch bolt 1 can be rotated by removing the latch guide 7, and can be left or right-handed, and can be opened inward or outward.

Reference numeral 14 denotes a retractor, to which a spring 16 installed between a U-shaped bent portion 15 and the guide wall 11 constantly applies a resilient force in a direction away from the guide wall 11.

Reference numeral 17 denotes an inclined edge forming a part of the retractor 14, which allows sliding on the inclined surface of the inclined bent portion 18 formed on the latch guide 7.

19.19 Projections formed on the beam tractor 14 are fitted into the elongated holes 20 formed on the bottom wall of the lock case and the elongated holes formed on the case lid, respectively, and serve as guides when sliding the rafter.

A hub 21 rotates in conjunction with the indoor and outdoor handles, has an operating arm 22, and is brought into contact with the outer surface of the U-shaped bent portion 15 of the retractor 14.

23 is a square hole for inserting a square rod attached to the handle, 24° 24
2 is a stud having a screw hole for attaching the case lid, 25 is an insertion hole of one of the mounting legs provided upright on the cylindrical plate of the outdoor handle, and 26 is a notch in which the other mounting leg is located.

In other words, the method for attaching the indoor/outdoor handle is to connect the mounting leg, which is erected on the cylindrical plate of the outdoor handle, from the outdoor side door surface to the indoor side through the insertion hole and notch formed in the case lid and the insertion hole and notch of the lock case. This is used when the cylindrical plate of the indoor handle is screwed to this mounting leg, and is not necessary when simply fixing the joint plate directly to the door surface with screws.

27 is a front plate. Next, the operating state will be explained. In the state shown in FIG. 1, when the door is in the closed state, the latch bolt 1 is fitted into the strike of the door receiving portion, and the natural opening of the door is prevented.

In this state, if the handle on the indoor side or the indoor side is rotated, the hub 21 and the operating arm 22 are rotated, and the retractor 14 is pushed up against the spring force of the spring 16, so that The latch guide 7 and the latch bolt 1 are moved back through the shaped bent portion 18 against the spring force of the spring 6, and the door can be opened.

When the door is closed again, the latch bolt 1 is fitted into the strike again and the closed state of the door is maintained, as in the conventional case.

In the above embodiment, since the latch bolt is rotatable, it is linked to the J)-rafter via a removable latch guide, but when using a latch bolt that only moves in and out, it is especially necessary to use a separate component. It is not necessary to provide a separate latch guide, and the latch bolt itself may be formed with an inclined surface that can slide against the inclined edge.

As is clear from the above description, the door lock of this invention is provided with a latch bolt that can slide in a direction substantially perpendicular to the direction in which the latch bolt comes in and out, and a sloped surface that can slide with the sloped edge provided on the tractor. By providing the latch bolt itself or the latch guide attached to the latch bolt, it is linked to the handle and the latch bolt is retracted when the tractor slides, so the latch bolt can be retracted in the same way as a retractor in a conventional door lock. Compared to the case where the lock moves backward, the depth dimension of the entire door lock can be made as small as possible, and it can be used even in cases where narrow aluminum sashes are often used as door frames as in recent years. Become.

In addition, since we adopted an interlocking structure in which the inclined edge and the inclined surface slide together, the interlocking member can be made to the minimum necessary size, and the space occupied by the retractor inside the lock can be minimized, making it easy to install the handle. Even when using a cylindrical plate with mounting legs, it is possible to easily take up space for the mounting legs to be inserted, and it also has the advantage of being able to adopt a handle attachment method according to one's preference.

In addition, since the latch bolt removing tractor is not directly engaged with the slanted surface and the slanted edge simply slide together, it is possible to form the slanted surface provided on the latch bolt side into a removable latch guide as in the embodiment. There is no problem when using a rotatable latch bolt. It is.

[Brief explanation of the drawing]

Figure 1 is a side view of the door lock according to this invention with the case lid removed; Figure 2 is a side view of the same in its operating state; Figure 3 is a front view of the beam tractor; Figure 4 is a front view of the latch guide. It is a diagram. 1...Latch bolt, 7...Latch guide, 14...IJ l-rafter, 17...
... Slanted edge, 18 ... Slanted bent part.

Claims (2)

[Scope of utility model registration request] (1) By sliding the retractor through a hub that rotates in conjunction with the handle, the latch bolt, which is designed to be retractable by constantly applying an elastic force in the protruding direction, can be retracted against the elastic force. In this door lock, the retractor is capable of sliding in a direction substantially perpendicular to the retraction direction of the latch bolt, and is placed inside the lock case so as to constantly apply an elastic force in the retracting direction from the latch bolt. A latch guide having an inclined surface is provided at the end, and the retractor is provided with an inclined edge that slides on the inclined surface, and the hub is provided with a latch guide that allows the retractor to resist elastic force when the handle is rotated. A door lock that is provided with an actuating arm that engages a retractor to press in the direction of the latch bolt. (2) The door lock according to claim 1, wherein the latch guide is removably provided on the latch bolt.