JPH0618837Y2 - Locking device for automobile seats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a locking device for an automobile seat.

(Prior Art) In general, there is a rear seat for a vehicle in which the rear seat back is foldable and the seat back can be tilted forward so that the trunk room can communicate with the passenger compartment. Therefore, the latch mechanism that engages the seat back with the vehicle body is released by the release mechanism to tilt the seat back forward of the vehicle.

However, the release mechanism that releases the latch on the rear seat back is normally designed to operate the knob that protrudes upward from the rear seat back.Therefore, operate the knob from the passenger compartment to bring the rear seat back forward and move it to the trunk room. This means that the luggage inside can be taken out of the passenger compartment, which may result in theft or the like.

Therefore, for example, as a rear seat back lock device capable of preventing the rear seat back from tilting forward from the inside of the vehicle for the purpose of preventing theft or the like, for example, the actual opening 59.
As described in JP-A-104838, a latch mechanism that locks a retractable rear seat back to a vehicle body and a latch mechanism that is linked to the latch mechanism to release the latch mechanism by operating a knob enables the rear seat back to be tilted forward. It has been proposed that the connection with the release mechanism is released by moving a handle arranged in the luggage compartment.

(Problems to be solved by the invention) However, in the case of releasing the connection between the latch mechanism and the release mechanism, there is a risk that the release mechanism may be connected by repeated operation of the knob, and the rear seat back may not be held in a locked state. There's a problem.

The present invention has been made in view of the above point, and an object of the present invention is to provide a locking device for a vehicle seat, in which the lockability of the rear seat back is improved and the antitheft property is improved.

(Means for Solving the Problem) In order to achieve the above object, the present invention has a retractable rear seat back, and a striker is attached to the vehicle body, while the rear seat back has a lock lever. A latch mechanism for engaging the lock lever with the striker to lock the rear seat back to the vehicle body is attached, and a release mechanism capable of releasing the latch mechanism by operating the lock knob is linked to the latch mechanism. Based on the premise of a locking device for an automobile seat, the present invention is characterized by including a handle facing the interior of the luggage compartment and having a lock release preventing mechanism for holding the lock lever of the latch mechanism in a locked state by the movement of the handle. .

That is, the present invention does not release the linkage between the latch mechanism and the release mechanism in order to prevent the lock mechanism from unlocking, but holds the lock lever itself of the latch mechanism in the locked state.

(Function) When the handle arranged in the luggage compartment is moved, the lock release prevention mechanism holds the lock lever of the latch mechanism in the locked state, and the latch mechanism cannot be released by operating the lock knob of the release mechanism. .

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a rear seat of an automobile, which includes a seat cushion 2 and a retractable seat back 3 which can be laid down forward with respect to the seat cushion 2.

At the rear portion of the seat back 3, a latch mechanism 5 for locking the seat back 3 to the vehicle body 4, and a release mechanism which is linked to the latch mechanism 5 and can release the latch mechanism 5 by operating a lock knob 6. There is provided a lock device 11 including a mechanism 7 and a lock release preventing mechanism 10 having a handle 9 arranged in the trunk room 8 and holding the latch mechanism 5 in a locked state by the movement of the handle 9.

The latch mechanism 5 has a lock lever 21 which is removably engaged with a U-shaped striker 20 fixed to the vehicle body 4. The lock lever 21 has a through hole 21a, and a lock lever shaft 22 is fixed through the through hole 21a. The lock lever shaft 22 rotates around a lower first lock plate 23 and an upper second lock plate 24. It is movably supported, whereby the lock lever 21 is rotatable with respect to both lock plates 23 and 24.

Further, the lock lever 21 has the first and second locking portions 21 that lock the striker 20 to one side with respect to the through hole 21a.
b and 21c have third locking portions 21d on the other side, which engage with a safety plate 42 described later.

An engagement hole 21e is formed in the vicinity of the third locking portion 21d of the lock lever 21, and the engagement hole 21e is wound around the lock lever shaft 22 above the second lock plate 24. One end of the lock lever spring 25 is engaged through the elongated hole 24a of the second lock plate 24, so that the lock lever 21 moves to the striker 20.
Is always urged in the direction to release the engagement with.

In the release mechanism 7, one end of the release lever 26 having an engaging portion 26a is released inside a mounting portion 23a projecting upward from the side portion of the first lock plate 23, that is, on the side of the second lock plate 24. Lever shaft 27
It is rotatably attached by. The release lever 26 has a spring 28 wound around a release lever shaft 27 so that the engagement portion 26a is the second locking portion 21c of the lock lever 21 (the side facing the first locking portion 21b). Is always urged in the direction to engage with.

Further, an engagement pin 31 is provided on the other end of the release lever 26 so as to stand outward (on the side of the mounting portion 23a), and the lock knob 6 protruding from above the seat back 3 is attached to the engagement pin 31. Are linked via a link mechanism 32, and the locking pin 6 is unlocked by a lock release operation (pushdown operation) of the lock knob 6, whereby the lock pin 6 can be unlocked. More specifically, a rod 30 projecting below the lock knob 6 is connected to one end of a link 33 pivotally attached to the rear seat back, and the other end of the link 33 has a locking portion at the tip. Rod 34 having 34a
And the engaging portion 34a of the rod 34 is positioned below the engaging pin 31 at a fixed interval when locked,
When the lock is released, the release lever 26 is displaced upward so as to engage with the engagement pin 31 to pivotally displace the release lever 26, and the engagement between the release lever 26 and the lock lever 21 is released.

The unlocking prevention mechanism 10 includes a rotation shaft 41 pivotally mounted between the lock plates 23 and 24.
The upper end of the rotating shaft 41 (that is, the second lock plate 24
Side) and a safety plate 42 having an engaging portion 42a that is engaged with the third engaging portion 21d of the lock lever 21.
And the lower end of the rotating shaft 41 (the first lock plate 23
And a safety lever 43 fixed to the side).

Further, the safety plate 42 has an engaging portion 42b bent upward, and the engaging portion 42b engages with the long hole 24b of the second lock plate 24, so that the safety plate 42 is engaged.
It is designed to guide the rotation of the. The safety lever 43 has an extension portion 43a that has a handle 9 at the tip and projects in the radial direction, and a spring attachment portion 43b that is adjacent to the extension portion 43a and has a tip bent downward. A lock spring 45 is interposed between 43b and the spring mounting portion 23b of the first lock plate 23.

51 is a spacer member, and the small diameter portions 51a and 51b are provided at the upper and lower ends.
The small-diameter portions 51a and 51b are fitted into the fitting holes 23c and 24c of the lock plates 23 and 24, respectively, and function to keep the gap between the lock plates 23 and 24 constant. A holder rubber 52 is interposed between the lock lever 21 and the first lock plate 23.

According to the above-described structure, when the lock knob 6 protruding from above the rear seat 1 is pushed down, the locking portion 34a of the rod 34 of the link mechanism 32 linked to the lock knob 6 is displaced upward, and the spring 28 spring. The engagement pin 31 is displaced upward against the force, and the release lever 26
Rotate. As a result, the restriction by the engaging portion 26a of the release lever 26 is removed, so that the lock lever 2
1 is rotatable in the disengagement direction with the striker 20, and the seat back 3 can be tilted forward.

However, if the handle 9 is gripped from the side of the trunk room 8 through the window 4a and is engaged with the third locking portion 21d of the lock lever 21 against the spring of the lock spring 45, the lock lever 21 is rotated. Even if the movement is regulated by the safety plate 42 and the regulation by the release lever 26 is released by depressing the lock knob 6, the lock lever 21 cannot be rotated, and therefore the seat back 3 cannot be tilted forward.

When the handle 9 is rotated in the opposite direction, the regulation by the safety plate 42 is released, so that the seat back 3 can be laid down to the front side only by operating the lock knob 6.

(Effect of the Invention) As described above, according to the present invention, since the lock lever itself of the latch mechanism is held in the locked state, the linkage between the latch mechanism and the release mechanism is released to hold the latch mechanism in the locked state. As compared with the case of doing so, the holding property of the retractable rear seat back in the locked state is improved, and sufficient theft prevention can be achieved.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a schematic view of a rear part of an automobile, Figs. 2 and 3 are side and rear views of an upper portion of a seat back of a rear seat, and Fig. 4 is a perspective view of a locking device. 5 is an exploded perspective view, and FIGS. 6 and 7 are a plan view and a front view, respectively. 1 ... Rear seat, 3 ... Seat back, 4 ... Car body,
5 ... Latch mechanism, 6 ... Lock knob, 7 ... Release mechanism, 8 ... Trunk room, 9 ... Handle, 10 ... Unlock prevention mechanism, 11 ... Lock device, 20 ... Strike, 21 ... Lock lever

Claims (1)

[Scope of utility model registration request] 1. A retractable rear seat back having a striker attached to the vehicle body, while a lock lever is provided on the rear seat back to engage the lock lever with the striker to engage the rear seat back with the vehicle body. In a vehicle seat in which a latch mechanism for stopping is attached, and a release mechanism capable of releasing the latch mechanism by operating a lock knob is linked to the latch mechanism, the handle has a handle facing the trunk room. A lock device for an automobile seat, comprising a lock release preventing mechanism for holding a lock lever of the latch mechanism in a locked state by movement.