JPH024990Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention combines a guard arm and a lock, which are similar in concept to what is generally called a guard chain or guard chain.

Conventionally, safety chains or guard arms have been considered to be a type of door lock, but this idea is not necessarily correct. The original purpose of a security chain or guard arm is to prevent guests from entering the room against their will when the door is unlocked and opened by a visitor. In other words, if you put a safety chain on the door before opening the lock, it will prevent visitors from entering the room even if the door is opened with the lock open, thereby preventing unexpected harm.

For this purpose, a safety chain is attached in addition to the conventional lock. However, this safety chain is quite troublesome to put on and take off, so even if it is equipped with it,
Usually, for the purpose mentioned above, each time a visitor comes,
The current situation is that there are very few households that do so.
Also, considering the purpose, it would be legitimate to just lock the door and remove the security chain when there are no visitors (this is troublesome when you want to quickly get out from inside the room in an emergency), but this is a hassle. I often see people leaving the battery on, or not using it at all, or turning it on only at night, thinking it's a way to lock the door.

In view of the current situation, the present invention provides a completely new lock with a guard arm that is natural in use, satisfies the original purpose of a guard chain, and also has the function of a lock.

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

In the drawings, 1 is a dead bolt, 1a is an annular groove at the tip of the bolt 1, and a square tip portion X is provided at the tip. Reference numeral 2 denotes a slide groove bored in the strike 5, on which the sliding rotation shaft 3a of the guard arm 3 slides. Reference numeral 3b represents an engagement hole with the dead bolt 1 bored at one end of the guard arm 3, the details of which will be described later.
4 is the lock box, 5 is the strike, 5a is the dead bolt insertion hole, 6 is the door, 7 is the frame, 8 is the thumb turn,
m1 and m2 are strikes 5, and arm 3 is an embedded magnet.

The structure of the lock of the present invention is as follows. That is, the lock of the present invention has an annular groove 1a at the tip of the annular groove 1a.
A lock box 4 having a square tip portion X larger than the diameter of the lock box 4 and a dead bolt 1 protruding in two stages, a strike 5 having a dead bolt engagement hole 5a and a slide groove 2, and a strike 5 having a dead bolt engagement hole 5a and a slide groove 2 at one end. It has a sliding rotating shaft 3a that can slide and rotate against the other end, the dead bolt 1 is engaged with the other end, and the lock box 4 side is a square part y, and the strike 5 side is a circular part Z larger than the square part y. The guard arm 2 has an engaging hole 3a formed therein.

The operation of the present invention will be explained below.

(Description of operation) (a) When the door is closed and unlocked, the dead bolt 1 is in the first stage protruding state as shown in FIG. 4, and the tip of the dead bolt 1 enters the engagement hole 3b of the guard arm 3.

As shown in FIGS. 4a and 4b, the tip of the dead bolt 1 is a square tip portion X, and an annular groove 1a is recessed in the rear portion of the tip.

On the other hand, the engagement hole 3b of the guard arm 3 has a circular part Z on the strike 5 side, and a square part y on the lock box 4 side.
It is becoming.

In the first stage protruding state when the door is closed and unlocked, the square end portion X of the dead bolt 1 passes through the square portion y of the engagement hole 3a of the guard arm 3 and is located in the circular portion Z. In this state, open the door 6 as shown in Figure 1.
When opened, the guard arm 3 is attached to the sliding rotation shaft 3a.
The square part X of the bolt 1 engages with the peripheral wall of the square part y of the guard arm 3, and the bolt 1 rotates while sliding inside the slide groove 2. There's no getting out.

In this way, the guard arm 3 can prevent unnecessary entry of guests from outside, similar to the conventional security chain.

(b) To lock the lock, for example, turn the thumb turn 8 to bring the dead bolt 8 into the second stage protruding state (Fig. 5). The square part X enters the dead bolt insertion hole 5a of the strike 5, and the lock of the present invention It will be locked.

(c) In order to maintain the position of the guard arm 3 when the door is unlocked, magnets m1 and m2 are embedded in the corresponding positions of the strike 5 and the guard arm 3 as shown in Figure 6. The position of the arm 3 is maintained without wobbling.

(Effects of the present invention) Since the guard arm 3, which corresponds to a conventional safety chain, is provided integrally with the lock, there is no need to put it on and take it off each time, unlike the conventional safety chain, and it is easy to handle.

In addition, as a prior invention of the present invention, JP-A-57-
The safety chain of No. 180769 has been proposed because, in this prior invention, a long hole is bored on the free end side of the sliding member corresponding to the guard arm of the present invention and engaged with a dead bolt, so that when the door is opened, The free end of the swinging member protrudes from the locking member (see the protrusion of the free end of the swinging member 10 from the locking member 3a in FIG. 3 of the publication of the prior invention), and the swinging member becomes loose. It makes a lot of noise, and sometimes bumps into people's hands. In contrast, in the present invention, since the strike 5 is provided with the slide groove 2, the sliding rotation shaft 3a of the guard arm 3 slides up while rotating slightly within the slide groove 2.

Therefore, the guard arm 3 engages the dead bolt 3b and the rotating sliding shaft 3a in the process of opening the door 6.
Since the length between them is kept constant, there is no wobbling like in the prior invention.

[Brief explanation of drawings]

Figure 1: Perspective view of the lock of the present invention in use, Figure 2
Fig. 3: A perspective view of the arm 3 and strike 5; Fig. 4 a: A front sectional view of the dead bolt 1 when the first stage is extended; Fig. 4 b: The dead bolt 1 and the arm 3. FIG. 5: A front cross-sectional view of the dead bolt 1 when the second stage is extended. FIG. 6: An explanatory view of the position holding device of the arm 3 during unlocking. 1... Dead bolt, 1a... Annular groove, 2...
Slide groove, 3...Guard arm, 3a...Rotation sliding shaft, 3b...Dead bolt connection hole, 4...Lock box, 5...Strike, 5a...Dead bolt insertion hole, 6...Door, 7... ...Frame, 8...Thumb turn, X...Square tip, (of dead bolt 1),
y...square part (of guard arm 3), Z... circular part (of guard arm 3), m1, m2... magnet.

Claims (1)

[Claims for Utility Model Registration] A lock box 4 attached to a door 6, which has a dead bolt 1 projecting in two stages, with a square tip portion X larger than the diameter of the annular groove 1a at the tip of the annular groove 1a.
, a strike 5 attached to a frame 7 having a dead bolt engagement hole 5a and a slide groove 2; a sliding rotation shaft 3a that is slidable and rotatable relative to the slide groove 2 of the strike 5 at one end; It consists of a guard arm 2 having an engagement hole 3a with which a dead bolt 1 is engaged at the end, and a square part y on the lock box 4 side and a circular part Z larger than the square part Y on the strike 5 side. During the first stage of protrusion,
The square end X is the engagement hole 3 of the guard arm 2.
A lock with a guard arm, characterized in that the circular part Z of a is configured to engage with a dead bolt engagement hole 5a of a strike 5 during the second stage of protrusion.