JPS589945Y2 - lock - Google Patents

Description

[Detailed description of the invention] This invention relates to a lock that can prevent unauthorized unlocking.

In general, even if a lock is made to be strong, if a strong rotational force is applied to the knob in the unlocking direction with a pipe wrench or the like when locking, the spindle will rotate and the cam and retractor will operate, causing the spindle to rotate. If the lock is twisted and destroyed, the operating rod that rotates the hub will rotate, and the hub will immerse the bolt, which could lead to unauthorized unlocking.

This invention addresses the above-mentioned difficulties and focuses on the fact that due to the structure of the lock, the spindle rotates before the operating rod, and by improving the hub removal tractor, it is possible to prevent unauthorized unlocking. This is what we are trying to provide.

Hereinafter, the configuration of this invention will be explained with reference to the drawings shown as one embodiment.

Reference numeral 1 denotes a latch bolt, which engages a protrusion 4 of a latch tail 3 with a long hole 2 provided in the upper and lower side walls, and is connected to the latch tail 3 with a spring 5 interposed between the bolt and the latch tail. , is provided so as to be removable from the case 6.

A retractor 7 has one end connected to the latch tail 3, and a retractor spring 9 interposed between the other end and the rear wall 8 of the case 6.

Reference numeral 10 denotes a threaded bolt, which is provided so as to be able to move in and out of the case 6.

A cam 11 is rotatably provided on the case 6, and protrusions 12 and 12 formed on the upper and lower sides engage with rising pieces 13 and 13 formed on the retractor 7, respectively.

Reference numeral 14 denotes a hub, which includes a cam 11 and a lid body, and a dead operation piece 1 which is provided at 15 so as to be rotatable independently of the cam 11 and formed in a protruding shape.
A spring receiving part 17 is formed on one side of the spring 6, and a trough-lid abutting part 18 is formed on the other side.

The dead operation piece 16 of this hub 14 is engaged with a notch 20 provided in the dead body 19 of the dead bolt 10,
When the retractor 7 slides rearward, the retractor abutting portion 18 is caused by the hub regulating portion 2 provided on the tractor 7.
1, and rotation of the hub 14 is prevented.

Reference numeral 22 denotes a dead spring, which is wound around the screw bearing shaft 23. One end of the spring is in contact with the upper wall 24 of the case 1, the other end is in contact with the bent piece 25 of the dead body 19, and the spring 22 is in contact with the bent piece 25 of the dead body 19 near the other end. It is in contact with the spring receiving part 17.

A spindle 26 is fitted into the spindle hole 27 of the cam 11, and one end is fixed to the knob.

When the spindle 26 is rotated by the knob, the cam 11 rotates, the retractor 7 slides rearward, and the latch bolt 1 is retracted into the case 6.

Reference numeral 28 denotes an operating rod, which is fitted into an operating rod hole 29 of the hub 14, and one end of which is connected to the cylinder.

When the operating rod 28 is rotated by the cylinder, the hub 14
rotates, and the deadbolt 10 sinks into the case 1.

This invention adopts the above configuration, so Figures 1 and 6
In the locked state shown in the figure, when a rotational force is applied to the outdoor knob in the unlocking direction, the spindle 26 rotates and the cam 11 rotates, thereby the retractor 7 slides rearward and the second As shown in the drawings and FIG. 7, the hub regulating portion 21 of the retractor 7 abuts against the retractor abutting portion 18 of the hub 14. As shown in FIG.

In this state, even if a strong rotational force is applied to the knob in the unlocking direction with a pipe wrench or the like, the hub 14 will not be able to rotate because the retractor abutting section 18 is in contact with the hub regulating section 21. 10 is prevented from entering and the locked state is maintained.

If a strong rotational force is still applied, the operating rod 28 will be twisted to prevent unauthorized unlocking.

As mentioned above, this invention can prevent unauthorized unlocking, and can be easily implemented for many locks because it can achieve its purpose by improving the retractor and hub without requiring separate parts. This has practical effects such as a simple configuration.

[Brief explanation of the drawing]

Figure 1 is a side view of an embodiment of the lock according to this invention in a locked state with the lid open, Figure 2 is a side view with the lid opened with the beam tractor sliding, and Figure 3 is a line taken along line III-III in Figure 2. A cross-sectional view of
Fig. 4 shows the beam tractor, A is a plan view, B is a front view, Fig. 5 is a hub, A is a plan view, B is a side view, C is a bottom view, Figs. FIG. 7 is an explanatory diagram of the operation. 7...Retractor-114...Hub,
18...Retractor-contact part, 21...
・Hub Regulation Department.

Claims (1)

[Scope of utility model registration request] A lock in which a deadbolt is moved in and out through a hub that rotates in conjunction with a cylinder, and a retractor is slid by a cam that rotates in conjunction with a knob to retract the latch bolt against elastic force. , wherein the hub is formed with a retractor contacting portion, and the retractor is provided with a hub regulating portion that comes into contact with the hub tractor contacting portion in the locked position when the retractor is slid. .