JP3886436B2 - Unlock mechanism for vehicle seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lock release mechanism for a vehicle seat such as an automobile seat.
[0002]
[Prior art]
Conventional rear seats for automobile seats include, for example, an operation member such as an operation lever provided on a vehicle body that supports a seat back in an upright manner by locking the seat back with a lock mechanism and locking the lock mechanism on the seat back. There is one that is released by operating and the seat back is moved forward.
[0003]
In the above-described seat back lock release mechanism, for example, as shown in Japanese Utility Model Publication No. 5-45544 (FIG. 1), the operation force of the unlocking operation member connected to the lock mechanism via a connecting rod is used. The connecting rod is pulled upward to release the lock by the lock release mechanism, and the lock rod holds the lock release state by the lock mechanism when the lock is released.
[0004]
[Problems to be solved by the invention]
In the above unlocked state, the connecting rod is fixed in the length direction by the cam so that the striker on the vehicle body side is locked to the latch on the seat side.
Therefore, even if the operating member is operated in the unlocked state, the connecting rod cannot be pushed down because the connecting rod is fixed.
[0005]
By the way, the operating member is disposed so as to protrude upward from the top of the seat back, which is the outside of the seat back. By pulling the operating member forward, the operating member rotates forward to pull up the connecting rod and lock the lock. Is configured to be released.
[0006]
And it is formed so that the seat back can be moved forward by gripping the operation member and pulling it further forward.
[0007]
Therefore, as described above, the operation member protrudes from the seat back, and because of the relationship that was used at the time of front-down, for example, when the front-back seat back is raised and locked to the vehicle body side, the operation member is erroneously gripped. May be lifted backwards.
[0008]
At that time, if the operating member is rotated in the locking direction, which is the rear, the connecting rod that connects the operating member and the locking mechanism is fixed as described above, and therefore the operating member is rotated backward. The connecting rod and the operating member are deformed into a curved shape without being pushed down by the force.
[0009]
There is a problem that the lock release mechanism does not operate due to the deformation of the connecting rod or the like.
[0010]
Therefore, the present invention provides a vehicle seat lock release mechanism that is configured so that the connecting rod that connects the operation member and the lock mechanism does not move in the length direction after the lock release. The purpose is to prevent the connecting rod and the like from being deformed even if the operating member is operated.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured to release the lock by the unlocking mechanism by pulling the connecting rod upward by the operating force of the unlocking operation member connected to the locking mechanism via the connecting rod, In the vehicle seat lock release mechanism in which the connecting rod holds the unlocked state by the lock mechanism when released, the operation member is pivotally attached to the fixed member of the seat and is coaxial with the operation portion. It consists of a lever part that is pivotally attached independently to the operation part and connects the connecting rod, and the operation part is turned to the lever part in the direction opposite to the unlocking direction. When the operating portion is rotated in the unlocking direction without being engaged, an engaging portion that engages with the operating portion is provided , and the connecting rod is connected to the lever portion .
[0012]
With the above configuration, the operation unit is independent of the lever unit that connects the connecting rod, and engages with the lever unit when unlocked. Only the operating portion rotates, and the operating force of the operating portion is not transmitted to the lever portion. Therefore, since the operating force of the operating portion is not applied to the connecting rod, the connecting rod or the like is not deformed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a rear seat of an automobile seat provided with a vehicle seat unlocking mechanism according to the present invention. In this rear seat, a seat back SB is locked to a vehicle body B side by a seat back locking mechanism 3, and a headrest HD is seated. It is locked by a headrest lock mechanism (not shown) provided in the back SB.
[0014]
The seat back SB and the headrest HD described above are configured such that the lock is released by operating the operation member 1 that protrudes upward from the top of one side of the seat back SB, and it can be moved as shown by a chain line in FIG. . In the figure, SC denotes a seat cushion that is flipped forward before the seat back SB falls forward.
[0015]
FIG. 2 shows a state when the seat back SB is locked, and FIG. 3 shows a state when the lock is released.
[0016]
The seat back SB is locked to the vehicle body B side by the seat back lock mechanism 3, and the seat back lock mechanism 3 has a conventionally well-known structure. The illustrated seat back lock mechanism 3 includes a striker 30 protruding from the vehicle body B side. The seatback SB side latch 31 that engages with the striker 30, the cam 32 that holds the engagement state of the latch 31, the spring 33 that is stretched between the cam 32 and the latch 31, and the like. Yes.
[0017]
The above-described latch 31 rotates around the pin 31B pivotally attached to the fixed plate 34 of the seat back SB, has a notch 31A for engaging the striker 30 at the edge, and the cam 32 has the pin 32B as the rotation center. A protrusion 32A that is pivotally attached to the fixed plate 34 and engages with the stopper of the latch 31 is provided integrally, and a connecting rod 2 that connects one end of the spring 33 and the operating member 1 to the tip of the cam 32. The lower end of is pivoted.
[0018]
The operation member 1 includes an operation portion 11 having an upper portion protruding outward from the top portion of the seat back SB, and a lever portion 12 that is coaxially connected to the operation portion 11 and pivotally attached independently to the operation portion 11. The lever portion 12 is provided with an engaging portion 12A that engages only when the operating portion 11 is rotated in the direction of the arrow in FIG.
[0019]
A resin knob 10 is integrally formed on the upper portion of the operation unit 11, and the lever 12 is connected to the upper end of the connection rod 2 and a connection wire 20 connected to the headrest lock mechanism.
[0020]
As shown in FIG. 3, the connecting rod 2 is configured not to move downward because the protrusion 32 </ b> A of the cam 32 abuts against the edge of the latch 31 when the seat back SB is unlocked.
[0021]
When the seat back SB is returned from the forward-turned state to the standing state, the striker 30 on the vehicle body B side hits the latch 31, the latch 31 rotates and the striker 30 comes into the notch 31A of the latch 31. Engage. As a result, the seat back SB is locked to the vehicle body B as shown in FIG.
[0022]
The operation portion 11 and the lever portion 12 constituting the operation member 1 are pivotally attached to a shaft 14 inserted through a mounting plate 15 fastened to a fixing member (not shown) such as a frame of the seat back SB. ing.
[0023]
As shown in FIG. 6, the operating portion 11 connects a pair of left and right plates with a connecting plate 11-3, one plate is formed in an L shape, and the engaging portion of the lever portion 12 is formed on the lower upper side 11A. 12A is formed so that it abuts and engages.
The upper portions 11C and 11C of the left and right plates are integrally embedded in the knob portion 10. 11B and 11B in the figure indicate insertion holes of the shaft 14.
[0024]
As shown in FIG. 6, the lever portion 12 is pivotally mounted in a pair of left and right plates constituting the operation portion by bending the plate into a substantially U shape.
[0025]
The engaging portion 12A is extended outward at a substantially right angle to one standing portion 12-1 of the lever portion 12, and the connecting rod 2 is hooked to the other standing portion 12-2. The latching hole 12C and the latching hole 12C for latching the connecting wire 20 are opened.
In the figure, 12B and 12B indicate insertion holes of the shaft 14.
[0026]
Then, the end of the spring 13 wound around the shaft 14 is locked to the lever portion 12 and the operation portion 11 so that the upper side 11A of the operation portion 11 abuts against the engagement portion 12A of the lever portion 12. It is fast.
[0027]
The shaft 14 passes through the insertion holes 15B and 15B of the mounting plate 15.
[0028]
Thus, since the lock release mechanism according to the present invention is configured as described above, when the operation member 1 is rotated in the forward arrow direction from the locked state of the seat back SB shown in FIG. The shaft 14 is rotated around the center of rotation, and the engaging portion 12A of the lever portion 12 is pulled upward.
[0029]
As a result, the lever portion 12 rotates about the shaft 14 and pulls the connecting rod 2 upward, so that the engagement state of the cam 32 with the latch 31 is released and at the same time the latch 31 is moved by the elasticity of the spring 33. The striker 30 on the vehicle body B side is turned off from the latch 31 and the seat back SB is unlocked as shown in FIG.
[0030]
Since the connecting wire 20 is also pulled simultaneously when the operation unit 11 is rotated, the headrest is unlocked and the headrest HD is moved to the front side of the seat back SB by the elasticity of a spring or the like that biases the headrest HD forward. Fall forward.
[0031]
Then, in the unlocked state of the seat back SB by the operation member 1 shown in FIG. 4, even if the occupant mistakenly operates the seat back SB in the direction of the arrow in FIG. And the lever portion 12 are independently attached to the shaft 14, and the operation portion 11 is free with respect to the lever portion 12 in the counterclockwise direction of FIG. Only the portion 11 rotates, but the lever portion 12 does not rotate.
[0032]
For this reason, the connecting rod 2 and the connecting wire 20 that are connected to the lever portion 12 are not deformed because they are not pushed downward.
[0033]
Further, since the spring 13 wound around the shaft 14 is locked at both ends to the operation portion 11 and the lever portion 12 and is not locked to the fixing member, the lever portion 12 always maintains a neutral state. Yes.
[0034]
The operation unit 11 is configured such that when it rotates in the unlocking direction, it hits a fixed stopper (not shown) in the seat back SB and does not rotate further forward. Yes.
[0035]
Further, what is shown shows a lock release mechanism of the seat back lock mechanism 3 that locks the seat back SB to the vehicle body B, but the present invention is not limited to this, and the seat back is folded upward and downward. It can also be used as a folding mechanism.
[0036]
【The invention's effect】
According to the present invention, in the lock release mechanism having the structure as described above, even if the operation member is erroneously operated after the lock release, the connecting rod or the like constituting the lock release mechanism is not deformed or damaged.
[0037]
Therefore, since the lock release mechanism always operates reliably, the seat can be locked and unlocked accurately. In particular, in a mechanism that simultaneously releases a plurality of locks, such as a seat back lock mechanism and a headrest lock mechanism, the lock release mechanism does not deform, and thus acts accurately.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a rear seat for an automobile provided with a mechanism according to the present invention.
FIG. 2 is an explanatory diagram of the mechanism of the present invention in a locked state.
FIG. 3 is an explanatory diagram of a state where the lock is released by the mechanism of the present invention from the state of FIG. 2;
FIG. 4 is a cross-sectional view of a main part in an unlocked state.
FIG. 5 is a front view of a main part in the state of FIG. 4;
FIG. 6 is an exploded perspective view of a main part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Operation member 2 Connecting rod 3 Seat back lock mechanism 11 Operation member operation part 12 Operation member lever part 12A Lever part engagement part

Claims (3)

The connecting rod is pulled upward by the operating force of the unlocking operation member that is connected to the lock mechanism via the connecting rod to release the lock by the unlock mechanism, and the lock rod is unlocked by the lock mechanism when the lock is released. In the vehicle seat unlock mechanism for maintaining the state,
The operation member is pivotally mounted on a fixed member of the seat so as to be pivotable, and a lever portion that is coaxially coupled to the operation portion and pivotally pivoted independently of the operation unit so as to connect the connecting rod. Consists of
Engagement portion with which the operation portion is engaged when the operation portion is rotated in the unlocking direction without being engaged with the lever portion when the operation portion is rotated in the reverse direction with respect to the unlocking direction. A vehicle seat unlocking mechanism comprising: a connecting rod connected to the lever portion ; 2. The vehicle seat unlocking mechanism according to claim 1, wherein the locking mechanism is one or both of a seatback locking mechanism that locks the seatback to the vehicle body side and a headrest locking mechanism that locks the headrest to the seatback side. The vehicle seat unlocking mechanism according to claim 1 or 2, wherein a connecting rod connected to the seat back locking mechanism and a connecting wire connected to the headrest locking mechanism are connected to the lever portion.

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