JPS5838126Y2 - padlock - Google Patents

Description

[Detailed description of the invention] This invention relates to a padlock that uses a ball as a locking member, and its purpose is to:
The purpose is to provide a padlock from which the key can be removed from the cylinder.

That is, this invention is a padlock that locks and unlocks with a ball that can be engaged with and released from a ball groove of a locking hook.
A cam having a notch is fitted, the ball is fitted and held in the ball groove on the circumferential surface thereof, and the ball is detachable from the ball groove at the notch, and the cam and the inner cylinder end are unlocked. It is possible to interlock with the direction and engage so that only the end of the inner cylinder can be returned independently, and a cam return spring is installed between the cam and the end of the inner cylinder, so that the ball separates from the ball groove and the cam In the unlocked state located in the notch of the lock, the inner cylinder can be independently rotated back to the key extraction position, thereby making it possible to extract the key in the unlocked state and pushing the locking hook in again. When the ball and ball groove face each other, the cam automatically returns to its original position due to the force of the spring, resulting in a locked state.

Hereinafter, an explanation will be given according to the drawings shown as one embodiment.

1 is a locking hook, and the base 2 is an inverted U that is longer than the locking part 3.
The base 2 is fitted into a hook hole 5 provided in a lock body 4 while being biased in the protruding direction by a hook spring 6.
The hook removal stopper 7 is loosely fitted into a recessed part 8 provided in the base 2 to prevent it from falling off from the lock body 4, and when the lock is locked, the locking part 3 is fitted into the other hook hole 9, and when the lock is unlocked, the lock part 3 is fitted into the other hook hole 9. It is provided so as to be removed from this hook hole 9.

10.10' is a locking ball, which is inserted into the ball hole 11 communicating with the hook holes 5 and 9, and when the lock is locked, the ball groove 12.1 provided in the base 2 of the locking hook 1 and the locking part 3 is inserted.
It is designed to fit into 3.

Reference numeral 14 denotes a cylinder, which is constructed by providing an inner cylinder 16 inside an outer cylinder 15 and rotated by a key, and is installed in a cylinder installation recess 17 of the lock body 4 that communicates with the ball hole 11.

At the protruding end of the inner cylinder 16 of the cylinder 14, a cam 19 having a notch 18 is attached to a protrusion 20 provided on the large diameter part of the inner cylinder 16.
is fitted into the recessed part 21 formed on the lower peripheral edge of the cam 19 with play, and is interlocked with the rotation of the inner cylinder 16 in the unlocking direction by engagement of the protrusion 20 and the side edge of the recessed part. Furthermore, the inner cylinder 16 can be returned to its original position until the projection 20 comes into contact with the other side edge of the recessed notch 21.

The notch 18 of this cam 19 and the circumferential surface that sandwich this notch are located in the ball hole 11, and when the lock is locked, the circumferential surface presses the ball 10, 10', and the ball groove 10 of the locking hook 1 is pressed. .13 to maintain the locked state,
When unlocking, the ball 10.10' is opposed to the notch 18 so that it can exit from the ball groove 12.13,
One ball 10 is pressed by the base 2 of the locking hook 1 and fitted into the notch 18.

Further, a cam return spring 22 is installed between the cam 19 and the end of the inner cylinder 16 so that when the inner cylinder 16 returns independently, the spring 22 rotates to return to its original position.

Next, the operation will be explained.

1 and 2 show the locked state, in which the locking portion 3 of the locking hook 1 is fitted into the hook hole 9, and the ball 10.
10' are pressed outward by the circumferential surface of the cam 19, one ball 10 fits into the ball groove 12 of the base 2, the other ball 10' fits into the ball groove 13 of the locking part 3, and the locking part 3 It is impossible to protrude and the locked state is maintained.

In this locked state, when the key is inserted into the inner cylinder 16 and rotated, the cam 19 rotates at the same time, and the notch 18 of the cam 19 and the ball 10.10' correspond to each other.
When ' is in a movable state, the locking hook 1 uses the elastic force of the hook spring 60 to move the ball 10.10' to the notch 1.
8 and slides, the locking part 3 comes off from the hook hole 9,
The door is unlocked in the state shown in FIGS. 3 and 4.

In this unlocked state, the inner cylinder 16
When the cam 19 is rotated, the ball 10 pressed by the base 2 of the locking hook 1 is fitted in the notch 18 of the cam 19, so the cam 19 does not rotate, and only the inner cylinder 16 is opened as shown in FIG. It returns to its original position, allowing the key to be removed while maintaining the unlocked state.

In the unlocked state with this key removed, the locking hook 1
When the locking part 3 is fitted into the hook hole 9 by pressing , the base 2
and the ball 10.10' in the ball groove 12.13 of the locking part 3.
Correspondingly, the ball 10.10' becomes movable, and the cam 19 rotates under the action of the return spring 22, pressing the ball 10.10' outward, and the ball 10.10' becomes movable in the ball groove 12. .13 and enters the locked state shown in Figures 1 and 2.

As is clear from the above-mentioned embodiments, this invention involves fitting a cam having a notch to the inner cylinder end of a cylinder attached to the lock body, and at that point fitting and holding the ball in the ball groove. At the same time, the cam can be detached from the ball groove at the notch, and the cam and the cylinder inner cylinder can be engaged with each other so that they can be moved in the unlocking direction and only the inner cylinder can be returned independently, and the cam and the inner cylinder end Since a cam return spring is installed between the locks, the key can be removed by inserting the key into the inner tube of the cylinder and rotating the inner tube and cam to unlock the lock. This is preferable in terms of lock management compared to the case where the key is always attached in the unlocked state.

Furthermore, since the padlock automatically returns to the locked state when the locking hook is operated, it is possible to provide a padlock that is easy to lock and has great practical value.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the padlock according to this invention in a locked state, Fig. 2 is a cross-sectional view taken along the line I■-II in Fig. 1,
Figure 3 is a vertical cross-sectional view of the unlocked state, Figure 4 is the IV-
FIG. 5 is a sectional view taken along the line IV, with the key removed in FIG. 4. 1...Lock hook, 4...Lock button-110, 10'...Ball, 12...
・Ball groove, 13...Ball groove, 14...
... Cylinder, 15 ... Outer cylinder, 16 ...
...Inner cylinder, 18...Notch, 19...
Cam, 22... Spring for cam return.

Claims (1)

[Scope of utility model registration request] In a padlock that locks and unlocks with a ball that can engage and disengage from the ball groove of the locking hook, a cam with a notch is fitted into the protruding end of the inner cylinder of the cylinder attached to the lock body, The ball is fitted into and held in the ball groove, and is detachable by the ball groove at the notch, and a protrusion protruding from the inner cylinder is provided as a play lock in a concave notch formed on the lower peripheral edge of the cam. The engagement between this protrusion and the side edge of the concave notch allows the cam and the inner cylinder to be interlocked in the unlocking direction, and only the inner cylinder returns independently until the protrusion engages the other side edge of the concave notch. A padlock with a cam return spring installed between the cam and the end of the inner cylinder.