JPS6135667Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a child proof locking device for a vehicle door.

As an example of this type of device, as described in Japanese Patent Application Laid-Open No. 54-35918, a child proof lock device connected to a door lock device is connected to a first lock lever connected to an inner handle of the door and the first lock lever connected to the door lock device.
A second lock lever is pivotally supported on the base plate concentrically with the lock lever and is latched to the open plate of the door lock device, and a child lever is also pivotally supported on the base plate and connected to the double-ended lock lever via a link. Things are publicly known.

However, in such a known device, the link is pivotally supported on the child lever, and the distal end engaging portion of the link is engaged with an engaging surface provided on the first lock lever, so that the engaging portion of the link is attached to the first lock lever. As the lock lever rotates, it separates from its engagement surface, resulting in the inconvenience that the engagement relationship becomes unstable.

The purpose of the present invention is to obtain a device free of such inconveniences, and the engaging portion of the link rotates in a stable engaged state without displacing its engagement position even when the first lock lever rotates. It has been made possible.

To explain this with reference to the illustrated embodiment, reference numeral 1 designates a base plate, on the front surface of which there is a latch 3 which pivots through a spring 2 so as to engage with it upon insertion of a striker, and a A ratchet 5 is resiliently engaged with the ratchet 5 via a spring 4 to maintain rotation, and one end is connected to the inner handle rod 6 to release the resilient engagement of the ratchet 5, and the other end is connected to the inner handle rod 6 to release the resilient engagement of the ratchet 5. An open plate 8 is connected to the outer handle rod 7 and swings when pulled by these rods 6 and 7, and a surface 8a of the plate 8 and the ratchet are connected to each other so as to negate the swing of the open plate 8. A lock slider 9 connected to a lock knob (not shown) is provided so as to be freely interposed in and out between the pressing surface 5a of the base of the lock slider 9 and the pressing surface 5a of the base of the lock slider 9.

2 and 3 on the side front surface of the board 1.
As shown in the figure, a first lock lever 11 is connected to the inner handle rod 6 via a support shaft 10.
and a second lock lever 12 latched to the open plate 8 are coaxially supported, and a support shaft 13
A child lever 14 is pivotally supported through a support shaft 15, and a link 16 is pivotally supported at one end on the back of the other end of the second lock lever 12 via a support shaft 15. A first pin 16a that engages with the child lever 14 is protruded from the back surface, and a second pin 16b that engages with the first lock lever 11 and the second lock lever 12 is protruded from the front surface. The guide groove 14a of the child lever 14 to be engaged is formed into a long hole so that the second lock lever 12 can swing freely, and the second pin 1
6b engages with the engagement groove 1 of the first lock lever 11
1a is formed with a locking groove 11b for locking the second pin 16b at one end and a loose fitting groove 11c for loosely fitting the second pin 16b at the other end.
The locking groove 12a of the lock lever 12 is formed in an arc shape along the rotation locus of the second pin 16b so as to always lock the second pin 16b. In the figure, 17 is an opening provided in the base plate 1 to regulate the swing angle of the child lever 14, 18 is a stopper protruding from the child lever 14 to come into contact with the side wall of the opening, and 19 is a cutout of the child lever 14. It shows a spring provided to hold the switch position.

Since the present invention is constructed as described above, when the child lever 14 is not set as shown in the second figure, the first lock lever 11 and the second lock lever 12 are locked together by the engagement of the second pin 16b. Thus, the inner handle rod 6
The opening plate 8 is rotated by the swinging of the second lock lever 12 in conjunction with the swinging of the first lock lever 11 connected to the latch 3, and the latch 3 is disengaged and unlocked, but the child lever 14 is now switched to the set state. As the link 16 rotates, the link 16 rotates about the support shaft 15, and the second pin 16b moves upward along the locking groove 12a of the second lock lever 12, and this upward movement is caused by the movement of the first lock lever 11. Free fit groove 1
1c, the first lock lever 11 connected to the inner handle rod 6 swings, but the lever 11 only swings in vain and the second lock lever 12
However, the latch 3 is not unlocked.

In this way, according to the present invention, link 16 is
A locking pin 16a that is pivotally supported on the second lock lever 12 and protrudes from one surface of the link 16 is engaged with a guide groove 14a provided on the child lever 14, and
A locking pin 16b protruding from the other surface of the link 16 concentrically with the locking pin 16a is attached to the second lock lever 12.
Since the locking groove 11b provided in the first lock lever 11 and the loose fitting groove 11c continuous to the other end of the locking groove 11b are selectively engaged with each other through the locking groove 12a provided in the locking lever 11, it is a child lever. 14 is not set, when the inner handle is pulled, the first lock lever 11 connected to it is pulled, and the second lock lever 12 is moved counterclockwise via the locking pin 16b of the link 16 in the engagement groove 11b. When the child lever 14 is in the set state, the locking pin 16b of the link 16 is in the loose fitting groove 11c of the first lock lever 11, and the locking pin 16b of the link 16 is in the loose fitting groove 11c of the first lock lever 11.
The pull of the lock lever 11 is disabled, and in this case, the link 1 that is pivotally supported by the second lock lever 12
6, the locking pin 16b is inserted into the second lock lever 1.
The first lock lever 11 is inserted through the second locking groove 12a.
The locking pin 16a, which is concentric with the locking pin 16b, is connected to the locking groove 14a of the child lever 14 in a switchable manner. In order to engage the link 16, the link 16 is always engaged with the first lock lever 11, the second lock lever 12, and the child lever 14, so that the link 16 can rotate in a stable state, and the rotation operation can be performed smoothly. It has the effect of

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a view taken along the line A-A in FIG. 1, and FIG.
The figure is a side view of FIG. 2. 3... Latch, 5... Ratchet, 6... Inner handle rod, 7... Outer handle rod, 8... Open plate, 11... First lock lever, 11a... Engagement groove, 12... Third 2 Lock lever, 12a...Latching groove, 14...Child lever, 16...Link, 16b...Latching pin.

Claims (1)

[Scope of utility model registration request] A childproof locking device connected to the door locking device includes a first locking lever 11 connected to the inner handle of the door, and a second locking lever 11 that is pivotally supported by the base plate 1 concentrically with the first locking lever 11 and latched to the open plate 8 of the door locking device. Like the lock lever 12, a child lever 14 is pivotally supported on the base plate 1 and connected to both the lock levers 11 and 12 via a link 16.
and the link 16
is pivotally supported on the second lock lever 12, and a locking pin 16a protruding from one surface of the link 16 is engaged with a guide groove 14a provided in the child lever 14, and a locking pin 16a and a locking pin 16a are provided on the other surface of the link 16. A concentric locking pin 16b is connected to a locking groove 11b provided on the first lock lever 11 via a locking groove 12a provided on the second lock lever 12.
A child-proof locking device for a vehicle door, characterized in that the locking device is selectively engaged with a loose fitting groove 11c continuous to the other end.