JPH0891101A - Lock mechanism for folding type rear seat back - Google Patents

Abstract

PURPOSE: To provide mechanism that can release lock from both cabin and trunk room sides and also inhibit lock release from the cabin side by providing a lock release means with a positioning means and a release action member for connecting a first and a second operating parts operated from a cabin and a trunk room and releasing or allowing lock by an engaging means. CONSTITUTION: A lock release means 36 in lock mechanism 10 has a first operating part 40 operated to be pushed in from the cabin 14 side, a second operating part 42 operated to be pushed in from the trunk room 16 side and pulled, and a connecting rod 44 for connecting the first and second operating parts 40, 42. In the case of releasing lock, a latch member 26 is rotated into a non- engaging position through a claw member 38 against the energizing force of a tension coil spring 34 so as to release the engagement between the latch member 26 and a hook member 24. When the lock release means 36 is further moved onto the trunk room 16 side, the lock release means 36 is moved onto the second position side by the reversal of energizing force of a turn-over device 50. In this state, the second operating part 42 is pushed in exclusively from the trunk room 16 side to release lock.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking mechanism for a retractable rear seat back, and more particularly, it can be unlocked from both the passenger compartment side and the trunk compartment side, and can be unlocked easily from the passenger compartment side. The present invention relates to an inexpensive lock mechanism.

[0002]

2. Description of the Related Art A passenger vehicle having a trunk room behind a rear seat is a retractable type in which the passenger compartment and the trunk room are separated from each other in an upright state, and the passenger compartment and the trunk room are communicated by being laid down on the passenger compartment side. There is a rear seat back that allows the trunk room and the passenger compartment side to be used as a continuous space. That is, the rear seat back is arranged at its lower end so as to be rotatable around a rotation axis substantially parallel to the vehicle width direction, and can be laid down toward the vehicle compartment side as necessary. In such a retractable rear seat back, the retractable rear seat back is locked to the vehicle body and locked in an upright state, or the locking to the vehicle body is released by operating the lock releasing means so that the retractable rear seat back falls down. Generally, a locking mechanism for permitting is provided.

The lock mechanism shown in FIG. 12 is an example thereof, and includes a bracket 152 fixedly mounted on the retractable rear seat back 150, and a rotation about a first axis A which is substantially parallel to the vehicle width direction. By being movably provided, the retractable rear seat back 150 is erected,
It is engaged with a striker 154 fixed to the vehicle body and rotated from an unlock position to a lock position,
The hook member 156 that locks the retractable rear seat back 150 in the upright state by being positioned at the lock position and the bracket 152 that is rotatable about the second axis B that is substantially parallel to the first axis A. The hook member 156 is mechanically positioned at the lock position by being engaged with the hook member 156 that is disposed and rotated to the lock position, while being hooked by being rotated to the non-engagement position. A latch member 158 that allows the member 156 to rotate to the unlocked position, and the latch member 15
The latch member 1 is connected to 8 and is manually operated.
And a lock release member 160 for rotating 58 around the second axis B to the non-engaging position. The hook member 156 is provided with an engagement groove 156a, and the striker 154 fixed to the vehicle body has the engagement groove 156a.
When the hook member 156 enters the inside and is rotated to the lock position, the hook member 156 and the striker 154 are rotated.
And are engaged so that they cannot be separated from each other, and the retractable rear seat back 150 is locked in the upright state. Also, the latch member 1
58 is provided with a pole 158a.
By engaging a with the engaging groove 156b of the hook member 156, the hook member 156 is prevented from rotating counterclockwise of the first axis A and is positioned at the lock position. Hook member 156 and latch member 15
A tension coil spring 162 is stretched between the
The pawl 158a and the engagement groove 156b are urged to maintain the meshed state, and the lock release member 160 is also provided.
When the latch member 158 is separated from the hook member 156 by the pulling operation, the hook member 156 is urged to rotate counterclockwise of the first axis A, that is, to the unlock position side.

FIG. 12 shows a state in which the hook member 156 is positioned at the lock position and the retractable rear seat back 150 is locked in the upright state. From this state, when the string-shaped lock releasing member 160 is pulled upward in the drawing to rotate the latch member 158 counterclockwise of the second axis B, the latch member 158 and the hook member 156 are engaged with each other. Disengagement, the hook member 156 is in the counterclockwise direction of the first axis A,
That is, the rotation to the unlock position side is allowed. In this way, the latch member 1 reaches the non-engaging position region where the hook member 156 is allowed to rotate counterclockwise.
With 58 being rotated counterclockwise of the second axis B,
When the retractable rear seatback 150 is pulled toward the passenger compartment, that is, in the right direction in the drawing, the hook member 156 is separated from the striker 154 while rotating counterclockwise about the first axis A. Can be laid down. In this fallen state, the hook member 156 is located at the unlocked position that is rotated counterclockwise of the first axis A compared to the state of FIG. 12, and the unlocked position is generated based on the biasing force of the tension coil spring 162. Held in. Since the latch member 158 can be rotated counterclockwise for unlocking, a rod-shaped lock releasing member 164 is attached to one end of the latch member 158 as shown by the alternate long and short dash line and the push-down operation is performed. It may be done.

On the other hand, the apparatus disclosed in Japanese Utility Model Publication No. 63-26975 is provided with a canceling mechanism for disabling the unlocking by the unlocking means, and disabling the folding of the retractable rear seat back if necessary. This prevents the luggage in the luggage compartment from being taken out from the passenger compartment side to prevent theft.

[0006]

However, since such a conventional lock mechanism can be unlocked only from the passenger compartment side, even if it is necessary to incline the seat back when loading luggage in the trunk room, the passenger compartments will be closed one by one. It was necessary to turn to the side and perform the unlocking operation, and the operability was not always good. Further, the device provided with the cancel mechanism for disabling the lock release by the lock release means has a complicated structure, the number of parts and the number of assembling steps are large, and the cost is high.

The present invention has been made in view of the above circumstances, and it is an object of the present invention that the lock can be unlocked from both the passenger compartment side and the trunk room side, and the unlocking from the passenger compartment side is easily disabled. It is to provide a simple and inexpensive locking mechanism that can be

[0008]

In order to achieve such an object, a first aspect of the present invention separates a vehicle compartment and a trunk room from each other in a standing state, and has a rotation shaft center substantially parallel to a vehicle width direction. The seats are arranged in a retractable rear seat back that connects the passenger compartment and the trunk room by pivoting the seats to the vehicle compartment side to bring them into communication with each other. A lock mechanism that allows the retractable rear seat back to fall down when it is locked by a manual operation and is locked by (a) the retractable rear seat back provided on the retractable rear seat back. And a locking means for mechanically locking the locked rear seat back to the vehicle body by raising the rear seat back, and (b) pushing from the passenger compartment side. A first operation unit to be operated, a second operation unit which is operated from the trunk room side, which first
And a coupling mechanism for mechanically coupling the operation section and the second operation section to interlock with each other, the first operation section can be pushed in from the passenger compartment side, and the second operation section can be operated on the trunk room side. From the passenger compartment side and the second operation portion can be operated from the trunk room side because the first position and the first operation portion are retracted into the retractable rear seat back. A lock releasing means disposed in the retractable rear seat back so as to be movable between the second position and (c) the lock releasing means and the locking means are provided so as to extend across the lock releasing means and the lock means. While the unlocking means unlocks the lock when the unlocking position is moved between the first position and the second position, the unlocking means is positioned at the first position or the second position. In the state, lock the locking means And releasing action member for containers, and biasing means for biasing to move the lock release means is moved to; (d) unlocking position to the first position,
(E) Positioning means for positioning the lock releasing means moved to the second position side beyond the lock releasing position at the second position.

[0009]

In the lock mechanism for such a retractable rear seat back, the lock release means is held at the first position according to the urging force of the urging means.
Alternatively, when the retractable rear seat back is erected while being positioned at the second position by the positioning means,
The locking means is locked to a striker or the like provided on the vehicle body and mechanically locked in the locked state. As a result, the retractable rear seat back is held in the upright state.

On the other hand, when the retractable rear seat back is laid down, whether the first operating portion is pushed in from the passenger compartment side when the lock releasing means is held at the first position according to the urging force of the urging means. When the second operating portion is operated from the trunk room side and the lock releasing means is moved to the lock releasing position against the urging force of the urging means, the lock of the locking means is released via the releasing action member. It is possible to lay down the inverted rear seat back. The unlocking means moved to the unlocking position is returned to the first position according to the urging force of the urging means unless it is positioned at the second position by the positioning means, so that the lock can be unlocked from both the passenger compartment side and the trunk room side. When returning the unlocking means to the first position as described above, the unlocking means may be operated within a range where the positioning means does not position the unlocking means.

Further, in a state where the unlocking means is moved to the second position side beyond the unlocking position and is positioned at the second position by the positioning means, the first operating portion retracted into the retractable rear seat back is provided. Since the vehicle cannot be pulled from the passenger compartment side, the second operating portion is exclusively operated from the trunk room side to unlock. When the lock releasing means is moved from the second position to the lock releasing position, the lock releasing means is moved to the first position according to the urging force of the urging means, so that the lock releasing operation from the vehicle interior side is disabled. When returning the lock releasing means to the second position, the lock releasing means may be moved to the second position side and positioned by the positioning means at the second position.

Here, the unlocked position is set to a wide range, and a switch between the unlocked position and the second position by the biasing means or the second position is switched with the intermediate position as a boundary. In that case, if the lock releasing means is operated within the range where the positioning means returns to the second position, it is not necessary to return to the second position side by side. In short, since it is sufficient that the unlocking means is returned to the first position by the biasing means when the unlocking means is held at the first position and the lock is released by pushing the first operating portion. is there.

As described above, in the lock mechanism of the present invention, if the lock releasing means is held at the first position, the lock releasing operation can be performed from both the passenger compartment side and the trunk room side, and the releasing operation can be performed. On the other hand, if the lock release means is positioned at the second position by the positioning means, the lock release from the passenger compartment side becomes impossible and theft prevention or the like can be achieved. Moreover, in the present invention, the unlocking means is arranged so as to be movable between the first position and the second position,
Since it can only be positioned at the second position as needed, the device can be configured easily and inexpensively as compared with the conventional case in which a cancel mechanism is provided and unlocking is disabled. is there.

It should be noted that the unlocking member that unlocks the locking means when the unlocking means moves from the unlocked position to the unlocking means does not depend on the moving direction of the unlocking means. The lock may be released only when it moves to either the first position or the second position, and is appropriately determined in consideration of the configuration of the locking means and the like.

The urging means is composed of, for example, a spring, and the positioning means is arranged to immovably position the unlocking means against the urging force of the urging means by, for example, a spring force or a frictional force. However, with the middle position between the first position and the second position and including the lock release position on the first position side as a boundary, the lock release means is used as the first position or the second position. It is also possible to construct the biasing means and the positioning means by means of a turnover device which is moved alternatively, in which case the device is simpler and cheaper to construct.

Further, by providing a moderation imparting means for increasing the movement resistance of the lock releasing means before the lock releasing means is positioned at the second position by the positioning means, that is, between the lock releasing position and the second position, the lock is provided. Whether the release means is moved to the first position according to the urging force of the urging means or is held at the second position by the positioning means can be easily recognized by the operation resistance, and the first operation portion is pushed. Thus, it is possible to prevent the lock releasing means from being pushed in to the second position against the intention when releasing the lock.

[0017]

A second aspect of the present invention is a specific example of the first aspect of the invention, in which the vehicle compartment and the trunk room are separated from each other in a standing state, and the rotation is substantially parallel to the vehicle width direction. It is arranged on a retractable rear seat back that connects the passenger compartment and the trunk room by pivoting about the axis and falling down to the vehicle compartment side, and the retractable rear seat back is locked to the vehicle body. A lock mechanism that locks the erected state and allows the foldable rear seat back to fall down by manually unlocking the foldable rear seat back. (F) The lock mechanism is fixed to the foldable rear seat back. And (g) is provided on the bracket so as to be rotatable about a first axis substantially parallel to the rotation axis, and the retractable rear seat back is erected. A hook member that is locked to the vehicle body, is rotated from an unlock position to a lock position, and is positioned at the lock position to hold the retractable rear seat back in an upright state; The hook member is disposed rotatably around a second axis that is substantially parallel to the first axis, and is engaged with the hook member that is turned to the lock position to mechanically move the hook member. The latch member that allows the hook member to rotate toward the unlock position by being rotated to the non-engagement position while being positioned in the lock position, and (i) the latch member is always A spring for urging the hook member in a direction to engage the hook member;
A first operation part that is pushed in from the passenger compartment side, a second operation part that is operated from the trunk room side, and a connection that mechanically connects the first operation part and the second operation part so as to interlock with each other. A first position where the first operation part can be pushed in from the vehicle compartment side and the second operation part can be operated from the trunk room side; and the first operation part is the retractable type. And a second position where the second operation section is immersive in the rear seat back and inoperable from the vehicle compartment side and operable from the trunk room side.
(K) The lock releasing means disposed on the retractable rear seat back, and (k) the lock releasing means and the bracket are disposed so as to extend over the lock releasing means, and the lock releasing means are disposed at the first position and the second position. The first of them with an intermediate position between
A turnover device for selectively moving to a position or a second position, and (l) rotatably provided on the lock releasing means about a third axis, the lock releasing means extending from the first position to the first position. When it is moved to the intermediate position, it is held at the engagement position and engages with the latch member to rotate the latch member against the biasing force of the spring to the non-engagement position. When the unlocking means is moved in the opposite direction, it is rotated around the third axis along with the engagement with the latch member, while the unlocking means is positioned at the first position or the second position. In this state, the latch member has a claw member that allows the latch member to engage with the hook member according to the biasing force of the spring.

[0018]

In the locking mechanism for such a retractable rear seat back, the retractable rear seat back is in a state in which the lock release means is located at the first position or the second position by the turnover device. When the back is erected, the hook member is locked to the striker fixed to the vehicle body and rotated from the unlock position to the lock position, while the latch member engages with the hook member according to the biasing force of the spring. Combined,
Mechanically position the hook member in the locked position. As a result, the retractable rear seat back is held in the upright state.

On the other hand, when the retractable rear seat back is laid down, the first operation portion is pushed from the passenger compartment side or the second operation portion while the lock release means is held at the first position.
If the operating portion is operated from the trunk room side and the lock releasing means is moved from the first position to the front of the intermediate position (the position corresponding to the lock releasing position of the first invention) against the biasing force of the turnover device, The claw member is engaged with the latch member during the movement process, and the latch member is rotated to the non-engagement position against the biasing force of the spring. As a result, the hook member is allowed to rotate to the unlock position side, and the retractable rear seat back can be laid down. The lock releasing means is selectively moved by the turnover device to the first position or the second position with the intermediate position as a boundary, so that the lock releasing means can be released from both the passenger compartment side and the trunk room side. When returning to the 1st position, the operation may be released in a state where the lock releasing means is located closer to the first position than the intermediate position.

Further, when the lock releasing means is held in the second position, the first operating portion cannot be pulled from the passenger compartment side, so the second operating portion is exclusively operated from the trunk room side to release the lock. Will be done. In that case, the pawl member is engaged with the latch member when the unlocking means is moved from the first position to the intermediate position, and the latch member is rotated to the non-engaging position. The lock release means is once moved to the first position and then returned to the intermediate position to release the lock. While the pawl member is again engaged with the latch member in the process of returning the lock releasing means to the first position, the lock releasing means moves to the first position by rotating the pawl member around the third axis. Is acceptable. Further, when returning the lock releasing means to the second position in order to disable the lock releasing operation from the vehicle interior side, the lock releasing means is moved to the second position rather than the intermediate position.
It suffices to cancel the operation while being positioned on the position side.

As described above, also in the lock mechanism of the second aspect of the present invention, if the lock releasing means is held at the first position, the lock releasing operation can be performed from both the passenger compartment side and the trunk room side. On the other hand, if the lock releasing means is held at the second position, the lock can not be released from the passenger compartment side, so that theft can be prevented. Moreover, since the unlocking means is arranged so as to be movable between the first position and the second position and can be held in the second position as needed, a cancel mechanism is provided as in the conventional case to lock. The device can be configured easily and inexpensively as compared with the case where the release is disabled. In particular, in the second aspect of the invention, since the unlocking means is selectively moved to the first position or the second position by the turnover device, the device is simpler and cheaper to construct.

The hook member, the latch member, and the spring correspond to the locking means of the first invention, and the turnover device corresponds to the biasing means and the positioning means of the first invention.

Further, by providing a moderation imparting means for increasing the movement resistance of the unlocking means at the intermediate position where the biasing direction of the turnover device is reversed, the unlocking means can be moved to either the first position or the second position. Whether or not the lock is released can be easily recognized by the operation resistance, and it is possible to prevent the lock releasing means from being pushed to the second position unintentionally when the first operating portion is pushed to release the lock.

[0024]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a partially cutaway front view showing a lock mechanism (hereinafter, simply referred to as a lock mechanism) 10 of a retractable rear seat back to which a second invention, which is an example of the first invention, is applied, FIG. 2 is a partial schematic view of the vehicle structure showing a disposition state of the retractable rear seat back 12 including the lock mechanism 10. Retractable rear seat back 1
2 is a passenger compartment 1 in a standing state as shown by a solid line in FIG.
4 and the trunk room 16 are separated from each other, and the lower end portion thereof is disposed so as to be rotatable about a support shaft (rotating shaft center O) substantially parallel to the vehicle width direction, and falls down toward the front side of the vehicle as shown by a chain line. This is to make the vehicle compartment 14 and the trunk room 16 communicate with each other so that they can be used as a continuous space. In such a communication state, the interior of the trunk room 16 does not go out of the vehicle. It is possible to take out luggage or the like to the passenger compartment 14 side, or to store a long object across both sides.

In FIG. 1, a lock mechanism 10 is fixedly mounted on a side portion of the retractable rear seat back 12 via a bracket 18, and the bracket 18 is vertically and substantially parallel to the vehicle width direction. A pair of rotating shafts 20 and 22 are provided separately from each other, and a hook member 24 and a latch member 26 are attached so as to be rotatable around the rotating shafts 20 and 22, respectively. Rotation axis 2
The axes A and B of 0 and 22 correspond to the first axis and the second axis, respectively. Standing up retractable rear seat back 12
A striker 28, which is a locking member, is fixed to the back of the vehicle by projecting forward from the vehicle body.
A notch 18a is formed for the striker 28 to enter. Although not shown, the bracket 1
A bracket having substantially the same shape as that of the lower half portion of 8 is arranged so as to cover the hook member 24 and the latch member 26 from the front side of the paper surface of FIG. 1, and supports both ends of the rotating shafts 20 and 22 together with the bracket 18. Is composed of.

When the retractable rear seat back 12 is erected, the hook member 24 allows the striker 28 to enter the engaging groove 24a and rotate from the unlock position to the lock position as shown in FIG. When it is rotated to the lock position by the latch member 26, the retractable rear seat back 12 is held in the upright state while maintaining the engagement state with the striker 28. The shape of the engagement groove 24a is determined so that an engagement relationship similar to the engagement between the rack and the pinion can be obtained according to the relative position with the striker 28. Also, the hook member 2
4 is provided with an engaging groove 24b, while the latch member 26 is provided with a pole 26a at a portion opposed thereto, and the hook member 24 is axially centered by engaging the pole 26a with the engaging groove 24b. It is prevented from rotating to the left of A and is positioned at the lock position.

A stopper 30 is provided on the bracket 18 and defines a counterclockwise rotating end of the axis A of the hook member 24. That is, the unlocked position of the hook member 24 is defined by the stopper 30. Further, a tension coil spring 34 is arranged between a locking portion of the hook member 24 provided on the right side of the rotation shaft 20 and a locking portion of the latch member 26 provided on the right side of the rotation shaft 22. The hook member 24 and the latch member 26 are urged to rotate toward the left side of the axis A and to the right side of the axis B, respectively, so as to approach each other. Therefore, as shown in FIG. 1, when the pole 26a is engaged with the engagement groove 24b, the engagement is maintained by the biasing force of the tension coil spring 34.

However, when the latch member 26 is rotated counterclockwise around the axis B against the biasing force of the tension coil spring 34, the latch member 26 and the hook member 24 are disengaged from each other and the hook member 24 is disengaged. Is allowed to rotate counterclockwise about the axis A to the unlocked position. In this way, the latch member 26 is rotated counterclockwise about the axis B to a non-engagement position region that allows the hook member 24 to rotate counterclockwise to the unlock position, for example, the position shown in FIG. When the retractable rear seat back 12 is pulled toward the vehicle compartment 14 in this state, the hook member 24 is separated from the striker 28 while rotating counterclockwise about the axis A, and the retractable rear seat back 12 is laid down. You can Hook member 24
After rotating from the lock position to the left of the axis A, even if the latch member 26 rotates to the right of the axis B according to the biasing force of the tension coil spring 34, the pole 2
6a is brought into contact with the convex portion 24c of the hook member 24, and the hook member 24 engages with the engaging groove 24a and the striker 28 as the retractable rear seat back 12 falls, and the hook member 24 is left on the axial center A. While being rotated around,
At the unlocked position where the striker 28 substantially abuts the stopper 30, the striker 28 completely comes out of the engagement groove 24a. The stopper 30 is the tension coil spring 3 after unlocking.
The minimum tension of 4 is also provided for the purpose of preventing the tension coil spring 34 from being disengaged or rattling.

A cushion member such as a rubber block or a spring, which is elastically deformed by abutting against the vehicle body side such as the striker 28 when the retractable rear seat back 12 is erected, is provided on the retractable rear seat back 12. In other words, when the latch member 26 is once rotated to the non-engagement position and the engagement between the pawl 26a and the engagement groove 24b is released, the retractable rear seat back 12 is pulled by the restoring force of the cushion member at that time. The hook member 24 is rotated slightly to the right in FIG. 5, and accordingly, the hook member 24 is rotated counterclockwise about the axis A while being separated from the striker 28. As a result, even if the latch member 26 is rotated clockwise about the axis B according to the biasing force of the compression coil spring 34, the pawl 26a and the engagement groove 24b are not re-engaged with each other, and the latch member 26 is simply moved. The locked state can be released simply by rotating the retractable rear seat back 12 to the non-engagement position, and then the tilting operation of the retractable rear seat back 12 may be performed.

An unlocking means 36 is provided in a portion of the retractable rear seat back 12 above the latch member 26 so as to be movable in the vehicle front-rear direction. The lock releasing means 36 is a first push-in operation from the passenger compartment 14 side.
The operation unit 40, the second operation unit 42 that is pushed and pulled from the trunk room 16 side, and the first operation unit 40
And a second operating portion 42 and a connecting rod 44 as a connecting mechanism that connects the second operating portion 42 so that they cannot move relative to each other and interlocks with each other. The first operating portion 40 is guided by a supporting member 46 provided on the vehicle compartment 14 side of the retractable rear seat back 12, and the second operating portion 42 is guided by a supporting member 48 provided on the trunk room 16 side. Therefore, the entire unlocking means 36 is movable between a first position on the vehicle compartment 14 side shown in FIG. 1 and a second position on the trunk room 16 side shown in FIG. In the first position, the first operation portion 40 is located in the vehicle compartment 14
Is a position where the second operation portion 42 can be operated from the trunk room 16 side, and the second position is
The first operation portion 40 is retracted into the retractable rear seat back 12 so that the operation from the passenger compartment 14 side is impossible, and the second operation portion 42 is provided.
Is a position that can be operated from the trunk room 16 side. The first operation part 40 has a push button shape, and the second operation part 42 has a ring-shaped lever part as shown in FIG. 3 which is a Z arrow view as seen from above in FIG. It is equipped with it protruding inside.

A turnover device 50 is arranged across the lock releasing means 36 and the bracket 18. In this turnover device 50, the lock releasing means 36 is provided at the first position with the intermediate position between the first position and the second position as a boundary.
It is urged to move to a position or a second position, and is provided with a turning lever 52 arranged on the bracket 18 so as to be rotatable about a pin 54 substantially parallel to the axis B. The rotating lever 52 is engaged with a pin 56 fixed to the connecting rod 44 substantially parallel to the axis B through an engaging groove 52 a formed at the tip end of the rotating lever 52. It is rotated around the pin 54 in conjunction with the movement, and the rotation range is defined by a pair of stoppers 58 and 60 provided on the bracket 18. When the turning lever 52 is brought into contact with the stopper 58, the first position of the lock releasing means 36 is determined as shown in FIG. 1, and when the turning lever 52 is brought into contact with the stopper 60, the rotation lever 52 shown in FIG. As shown in FIG.
A second position of is defined. Further, a tension coil spring 66 is provided between a pin 62 fixedly provided at the center of the rotating lever 52 and a pin 64 fixedly provided on the bracket 18 at a position higher than the pin 54 in FIG. And the lock releasing means 36 selectively moves to the first position or the second position with an intermediate position (a thought point) where the pin 62 is located on a straight line connecting the pin 54 and the pin 64 as a boundary. Be moved to.

The pin 56 of the connecting rod 44 is shown in FIG.
As can be seen from FIG. 4 which is a cross-sectional view taken along the line IV-IV, the connecting rod 44 is fixed by press-fitting or the like in a state of penetrating the connecting rod 44 substantially horizontally and protruding to both sides by a predetermined dimension. A claw member 38 is rotatably attached to the side opposite to the combined side, and the claw member 3
8 and the connecting rod 44 between the torsion coil spring 6
8 is wound around the outer circumference of the pin 56.
One end and the other end of the torsion coil spring 68 are hooked on a pin 70 fixed to the connecting rod 44 and a hook hole 72 of the hook member 38, respectively, and the biasing force of the twist coil spring 68 causes the hook member 38 to move. Is always in an engagement position capable of engaging with the latch member 26, that is, in FIG.
The pin 56 is held in a position rotated counterclockwise. This engaging position is the connecting rod 44
The protrusion 38a of the claw member 38 contacts the stopper pin 74 fixed substantially parallel to the pin 56, and the latch member 26 is provided in the process of the unlocking means 36 moving from the first position to the intermediate position. By engaging with, the latch member 26 is rotated to the non-engaging position as shown in FIG. FIG. 5 shows a state in which the unlocking means 36 is in the unlocked position, and the unlocked position is
The turnover device 50 is set between the intermediate position where the biasing direction is reversed and the first position. The axis C of the pin 56 corresponds to the third axis.

By operating the first operating portion 40 or the second operating portion 42 to move the lock releasing means 36 to the trunk room 16 side beyond the intermediate position, the turning lever 52 is stopped as shown in FIG. It can be located in the defined second position by abutting against 60. Since the unlocking means 36 has exceeded the intermediate position, the turnover device 5
Since the biasing direction by 0 is switched to the second position side, the unlocking means 36 is positioned at the second position by the biasing force. The turnover device 50 functions as a biasing means and a positioning means. At a point before the lock releasing means 36 as shown in FIG. 6 reaches the second position, the engagement between the claw member 38 and the latch member 26 is released, and the latch member 26 is released.
Is rotated clockwise about the axis B according to the biasing force of the tension coil spring 34. From this state in which the first operation unit 40 is immersed in the retractable rear seat back 12,
Since the lock release means 36 cannot be moved to the first position by pulling out the first operation part 40, the lock release operation from the vehicle interior 14 side becomes impossible. This makes it possible to prevent theft. That is, if a door / ignition key (so-called sub key) that cannot unlock the trunk room 16 from outside the vehicle is used, as when the vehicle is checked in, as with a vehicle in which the retractable rear seat back 12 is not provided. It is possible to prevent theft in the trunk room 16 in such cases.

Next, the operation of the lock mechanism 10 configured as described above will be described. When the unlocking means 36 is positioned by the turnover device 50 at the first position shown in FIG. 1 or the second position shown in FIG. 6, the retractable rear seat back 12 is erected so that the hook member 24 is released. While being locked by the striker 28 and rotated from the unlocked position to the locked position, the latch member 26 is engaged with the hook member 24 according to the biasing force of the tension coil spring 34, and the hook member 24 is moved to the locked position. Position it properly. As a result, the retractable rear seat back 12 is held in the upright state.

On the other hand, when the retractable rear seat back 12 is to be laid down, first, when the lock release operation is performed from the state where the lock release means 36 is located at the first position as shown in FIG. If it is, the first operation part 40 is pushed in, and if it is from the trunk room 16 side, the second operation part 42 is pulled, the lock releasing means 36 is moved to the lock release position shown in FIG. The latch member 26 and the hook member 24 are engaged with each other by rotating the latch member 26 counterclockwise around the axis B to the non-engagement position region via the lever. The hook member 24 is disengaged and is allowed to rotate in the counterclockwise direction of the axis A, that is, toward the unlock position. If the retractable rear seat back 12 is pulled toward the vehicle compartment 14 side, that is, in the right direction in the drawing in the state of FIG. 5, the hook member 24 rotates counterclockwise about the axis A while the striker 2 moves.
The retractable rear seat back 12 can be laid down by being separated from 8. The unlocking means 36 is selectively moved by the turnover device 50 to the first position or the second position with the intermediate position as a boundary, so that the lock releasing means 36 is locked so as to be unlocked from both the vehicle compartment 14 side and the trunk room 16 side. When returning the releasing means 36 to the first position,
The operation may be released in a state in which the lock releasing means 36 is located closer to the first position than the intermediate position.

In this fallen state, the hook member 24 is held at the unlocked position based on the biasing force of the tension coil spring 34. When the retractable rear seat back 12 is erected from the lying state, the lock releasing means 3 is used.
The retractable rear seat back 12 may be raised as it is without operating the 6 at all. At the time of this standing, the hook member 24 is rotated to the lock position side as the striker 28 enters the engagement groove 24a, the pawl 26a of the latch member 26 meshes with the meshing groove 24b, and the tension coil spring 34 is attached. By maintaining the meshing by the force, the hook member 24 is positioned at the lock position, and the retractable rear seat back 12 is maintained in the upright state.

Further, when the lock releasing means 36 is further moved from the lock releasing position of FIG. 5 to the trunk room 16 side and the pushing operation of the first operating portion 40 or the pulling operation of the second operating portion 42 is performed until the intermediate position is exceeded, The lock releasing means 36 is moved to the second position side by reversing the biasing force of the turnover device 50, and is positioned at the second position as shown in FIG. On the way, the latch member 26, which was engaged with the claw member 38, disengages as the claw member 38 moves, and meshes with the hook member 24 from the non-engaged position region according to the biasing force of the tension coil spring 34. Return to position.

When the lock releasing means 36 is held at the second position as described above, the first operating portion 40 is moved from the vehicle compartment 14 side.
Since the pulling operation cannot be performed, the second operating portion 42 is exclusively pushed from the trunk room 16 side to unlock. In that case, the pawl member 38 is engaged with the latch member 26 when the lock releasing means 36 is moved from the first position to the lock releasing position, and the latch member 26 is rotated to the non-engaging position. Therefore, after the lock releasing means 36 is once moved to the first position, it is returned to the lock releasing position to release the lock. While the pawl member 38 is engaged with the latch member 26 in the process of the lock releasing means 36 returning to the first position, the pawl member 38 is rotated clockwise about the axis C to release the lock. The means 36 is allowed to move to the first position. Further, when returning the lock releasing means 36 to the second position in order to disable the lock releasing operation from the vehicle interior 14 side, the lock releasing means 36 is operated in a state in which the lock releasing means 36 is located closer to the second position than the intermediate position. Should be canceled.

As described above, in the lock mechanism 10 for the retractable rear seat back according to this embodiment, the lock releasing means 3 is used.
If 6 is held in the first position, the unlocking operation can be performed from both the vehicle compartment 14 side and the trunk room 16 side, and the unlocking operation becomes easy, while the unlocking means 3
If 6 is held at the second position, the lock cannot be unlocked from the vehicle compartment 14 side, so that theft can be prevented.
Moreover, since the unlocking means 36 is arranged so as to be movable between the first position and the second position and can be held in the second position when necessary, a cancel mechanism is provided as in the conventional case. The device can be configured easily and inexpensively as compared with the case where the unlocking is disabled. Further, the lock release means 36 is provided by the turnover device 50.
Is selectively moved to the first position or the second position, so that the device is simpler and cheaper to construct.

Next, another embodiment of the present invention will be described. The same parts as those in the above-described embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

The locking mechanism 11 of the retractable rear seat back shown in FIG. 7 is configured to give a moderation to the unlocking means 36 as compared with the embodiment of FIG. The protrusions 52b are provided, and stoppers 59 and 61 for contacting the protrusions 52b and defining the rotation range of the rotation lever 52, and further the first position and the second position of the lock releasing means 36 are provided in the stoppers 58 and 60. Instead, the bracket 61 is provided, while the stopper 61 is provided.
A base end portion of a leaf spring 76 is attached in the vicinity of, and a tip end engaging portion 76a thereof is located on the rotation locus of the protrusion 52b. The leaf spring 76 provides moderation at a position where the unlocking means 36 is moved by a movement amount corresponding to the rotation amount of the rotation lever 52 rotated until the protrusion 52b is engaged with the tip engaging portion 76a. Then, the lock releasing means 36 moved from the first position shown in FIG. 7 gives the movement resistance before reaching the lock releasing position and reaching the intermediate position as shown in FIG.

In the lock mechanism 11 as described above, when the lock releasing means 36 held at the first position is moved to the lock releasing position to release the lock, the biasing direction of the turnover device 50 is reversed. Leaf spring 76 in front of
Since the movement resistance is given by the lock release means 36,
It becomes possible to easily recognize to which direction the first position and the second position are moved by the operation resistance, and when the first operation portion 40 is pushed in to release the lock, the lock release means 36 is unintentionally released. Can be prevented from being pushed to the second position. The leaf spring 76 functions as a moderation imparting means.

FIG. 9 is a partially cutaway front view showing a lock mechanism (hereinafter, simply referred to as a lock mechanism) 80 of a retractable rear seat back according to another embodiment of the first invention. Tiltable rear seat back 12 as in the previous embodiment
A slide member 88 is vertically mounted along the retractable rear seat back 12 via a pair of guide pins 84, 86 that are vertically spaced apart from each other. The notch 8 is attached so as to be movable in a direction (hereinafter referred to as a sliding direction) substantially orthogonal to the center of rotation of the back 12, and a notch 8 into which the striker 28 is inserted like the bracket 18.
2a is formed. A tension coil spring 90 is stretched between the bracket 82 and the slide member 88, and always biases the slide member 88 substantially downward in FIG. 9 so as to maintain the engagement state with the striker 28. ing. The slide member 88 includes an engagement groove 92 that engages with the striker 28, a pair of elongated holes 94 and 96 into which the guide pins 84 and 86 are inserted, and a substantially V-shaped intermediate portion therebetween. It has an elongated hole 98. Locking means is configured to include the slide member 88 and the tension coil spring 90.

On the other hand, the retractable rear seat back 12 has
A lock releasing means 100 that penetrates the retractable rear seat back 12 in the front-back direction at a right angle to the sliding direction of the slide member 88 is provided so as to be movable in the penetrating direction. The lock releasing means 100 has a first operating portion 102 that is pushed in from the vehicle compartment 14 side and a second operating portion 104 that is pushed in and pulled from the trunk room 16 side.
And a connecting rod 106 as a connecting mechanism for connecting the first operating section 102 and the second operating section 104 such that they are relatively immovable and interlocking with each other.
Is guided by a support member 108 provided on the vehicle compartment 14 side of the retractable rear seat back 12, and a second operation unit 106 is provided on the trunk room 16 side.
Guided by 10. The first operation unit 102 has a push button shape, and the second operation unit 104 is the same as that shown in FIG.
A ring-shaped lever portion similar to the above is provided in a state of protruding into the trunk 16.

Connecting rod 106 of unlocking means 100
An engagement pin 112 that is engaged with the elongated hole 98 is fixed to the first operation portion 102 or the second operation portion 10.
4 is moved together with the unlocking means 100. Therefore, due to the engagement between the engagement pin 112 and the elongated hole 98, the slide member 88 is moved against the urging force of the tension coil spring 90 in accordance with the movement of the lock releasing means 100, so that the elongated hole 98 When the lock releasing means 100 is operated to the lock releasing position where the engaging pin 112 reaches near the V-shaped valley, the engagement lock of the slide member 88 with the striker 28 is released. The shape of the elongated hole 98 is determined in correspondence with the stroke required for releasing the engagement of the slide member 88 with the striker 28 and the moving stroke of the lock releasing means 100. FIG. 9 shows a state in which the unlocking means 100 is located at the first position, in which the first operating portion 102 can be pushed in and the second operating member 104 can be pulled.

However, when the engaging pin 112 moves relatively beyond the V-shaped valley of the elongated hole 98, the tension coil spring 9
It moves to the moving end on the opposite side of the V-shape according to the urging force of 0,
The unlocking means 100 is positioned at the second position. Although illustration is omitted, when the unlocking means 100 is in the second position, the operation of the first operating portion 102 is impossible,
In addition, the pushing operation of the second operation unit 104 is possible. Therefore, the lock release operation cannot be performed from the vehicle compartment 14 side, and the lock mechanism 80 cannot be unlocked unless the second operation portion 104 is pushed from the trunk room 16 side. In the case of this embodiment, the unlocking is also performed when the unlocking means 100 is moved from the second position to the first position. In this embodiment, the tension coil spring 90, the elongated hole 98 and the engaging pin 112 correspond to the urging means and the positioning means, and the engaging pin 112 also corresponds to the releasing action member.

On the other hand, a protrusion 114 is provided in the vicinity of the elongated hole 96 of the slide member 88, and a plate spring 116 is fixed to the bracket 82 so that the protrusion 116a thereof is positioned on the movement locus of the protrusion 114. Is provided. In the leaf spring 116, the projection 116a engages with the protrusion 114 when the slide member 88 is moved and the engagement lock is released in accordance with the movement of the lock releasing means 100 to the lock releasing position as described above. Is provided so as to function as a moderation imparting means, and the same effect as that of the leaf spring 76 can be obtained.

Also in the lock mechanism 80 of this embodiment, when the lock releasing means 100 is located at the first position, the releasing operation can be selectively performed on both the vehicle compartment 14 side and the trunk room 16 side, Unlocking means 10
By positioning 0 at the second position, the operation from the vehicle compartment 14 side can be disabled, and the same effects as the above-described embodiment can be obtained.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention can be implemented in other modes.

For example, the lock releasing means 36 of the above embodiment.
In the above, the first operating part 40 and the second operating part 42 are configured to be relatively immovable by the connecting rod 44, but the first operating part 40 and the second operating part 42 are connected to the rack and a connecting mechanism such as a pinion or a link mechanism. It is also possible to connect them so as to have an interlocking relationship, and for example, it is possible to arrange the first operating portion 40 on the upper portion of the rear seat back 12 such that the operating directions intersect with each other. The same applies to the unlocking means 100.

In the above embodiment, the retractable rear seat back 12 is locked to the vehicle body by the hook member 24 that engages with the striker 28 and the latch member 26 that positions it, or the slide member 88. ,
The retractable rear seat back 12 may be locked to the vehicle body by using other locking members, locking elements and positioning elements,
The locking means can be configured in various forms with different basic structures.

In the embodiment shown in FIG. 1, the hook member 2 is used.
4 and the latch member 26 between the tension coil spring 34
However, it is possible to use other different springs such as a torsion coil spring and a wire spring instead of the tension coil spring 34.

Further, in the embodiment shown in FIGS. 7 and 9, the leaf springs 76, 116 are provided and the unlocking means 36, 1 are provided.
The moderation was given to each 00,
Such moderation imparting means does not necessarily have to be provided and may be omitted. It is also possible to configure the moderation imparting means by using another spring member or the like.

Further, in the embodiment shown in FIG. 9, the engaging pin 112 as the releasing member is provided in the lock releasing means 100, but as shown in FIG.
No. 0, the engaging pin 122 is fixed, and the lock releasing means 124, which is biased and positioned by a turnover device (not shown), is provided with a mountain-shaped convex portion 126.
May be configured to be engaged with.

Further, in the above embodiment, the lock releasing means 3
Although the latch member 26 is rotated or the slide member 88 is moved in the forward path of the lock release operation for moving the 6, 100 from the first position to the second position side, the lock is released. As shown in FIG. 11, the unlocking means 130 is provided with a cam 134 which is biased counterclockwise of the pin 132 and whose rotation end is defined, and the engaging portion 138 provided on the slide member 136 is provided with the cam 134. It is also possible that the lock is released on the return path that is moved by the biasing means after being operated to the second position side.

Further, in the embodiment shown in FIG. 9, the engaging pin 11 is used.
Since 2 is engaged with the V-shaped elongated hole 98, the slide member 88 by engagement with the striker 28 when the retractable rear seat back 12 is erected from the lying state.
9, the lock releasing means 100 is reciprocated in the operating direction. However, as shown by the alternate long and short dash line in FIG. It is possible to avoid unnecessary operation of the unlocking means 100.

Further, in the above embodiment, the lock mechanism 10, 1
1, 80 are arranged relatively above the retractable rear seat back 12, the arrangement position can be changed as appropriate, for example, the locking means is provided near the hinge point O in FIG. The lock releasing means may be provided on the upper portion of the seat back, and the lock releasing means may be connected to the locking means via a rod-shaped or link-shaped intermediate part or the like.

Although not illustrated one by one, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a lock mechanism for a retractable rear seat back to which a second invention, which is a specific example of the first invention, is applied.

FIG. 2 is a partial schematic view of a vehicle structure in which the lock mechanism of FIG. 1 is provided in a retractable rear seat back.

3 is a Z arrow view showing a second operation portion of the unlocking means in FIG. 1. FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a diagram showing a state in which the lock releasing means is moved to a lock releasing position in the lock mechanism of FIG. 1. FIG.

FIG. 6 is a view showing a state where the lock releasing means is moved to a second position in the lock mechanism of FIG.

7 is a diagram showing a mode in which a moderation imparting means is provided in the lock mechanism of FIG.

8 is a diagram showing a state in which the lock releasing means is moved to the lock releasing position in the lock mechanism of FIG. 7.

FIG. 9 is a partially cutaway front view showing the lock mechanism of the retractable rear seat back according to another embodiment of the first invention.

FIG. 10 is a diagram for explaining another mode of the release acting member.

FIG. 11 is a view for explaining still another mode of the release acting member.

FIG. 12 is a diagram illustrating a lock mechanism of a conventional retractable rear seat back.

[Explanation of symbols]

10, 11, 80: Locking mechanism for retractable rear seat back 12: Retractable rear seat back 14: Vehicle compartment 16: Trunk room 18, 19: Bracket 24: Hook member 26: Latch member 34: Tension coil spring (spring) 36 , 100, 124, 130: unlocking means 38: claw members 40, 102: first operating portion 42, 104: second operating portion 44, 106: connecting rod (connecting means) 50: turnover device 88, 120, 136 : Slide member (locking means) 90: Tensile coil spring (biasing means, positioning means) 112, 122: Engagement pin (release action member) 134: Cam (release action member) A: First axis B: No. 2 axis center C: 3rd axis center

Claims (2)

[Claims] 1. The vehicle compartment and the trunk room are separated by separating the vehicle room and the trunk room in a standing state, and are rotated about a rotation axis substantially parallel to the vehicle width direction and fall down to the vehicle room side. Is disposed on a retractable rear seat back that communicates with the retractable rear seat back, and the retractable rear seat back is locked to the standing state by locking the retractable rear seat back on the vehicle body, and the lock is released by a manual operation. A lock mechanism that allows the rear seat back to fall down, the lock mechanism being provided on the foldable rear seat back, and being locked to the vehicle body when the foldable rear seat back is erected, and its locked state. Locking means for mechanically locking the first operation part to be pushed in from the passenger compartment side, a second operation part to be operated from the trunk compartment side, and the first operation part. And a coupling mechanism that mechanically couples the working section and the second operating section to interlock with each other, the first operating section can be pushed in from the passenger compartment side, and the second operating section can be operated on the trunk room side. From the passenger compartment side and the second operation portion can be operated from the trunk room side because the first position and the first operation portion are retracted into the retractable rear seat back. A lock releasing means disposed on the retractable rear seat back so as to be movable between the second position and the lock releasing means and the locking means are provided so as to straddle the lock releasing means. While the lock is released when the lock release position between the first position and the second position is moved, while the lock release means is located at the first position or the second position, the lock is released. Release to allow locking of locking means Member, urging means for urging the lock releasing means moved to the lock releasing position to move to the first position, and moving to the second position side beyond the lock releasing position. A locking mechanism for the retractable rear seat back, comprising: positioning means for positioning the unlocking means to the second position. 2. The vehicle compartment and the trunk room are separated by separating them from each other in the upright state, and are rotated about a rotation axis substantially parallel to the vehicle width direction to fall down to the vehicle compartment side. Is disposed on a retractable rear seat back that communicates with the retractable rear seat back, and the retractable rear seat back is locked to the standing state by locking the retractable rear seat back on the vehicle body, and the lock is released by a manual operation. A lock mechanism that allows the rear seat back to fall down, the bracket being fixed to the retractable rear seat back, and the bracket being rotatable about a first axis substantially parallel to the rotation axis. Is provided on the vehicle body, and when the retractable rear seat back is erected, it is locked to the vehicle body and is rotated from the unlock position to the lock position. A hook member that holds the retractable rear seat back in an upright state by being positioned in a stationary position, and the hook member is rotatably disposed on the bracket about a second axis substantially parallel to the first axis. The hook member is mechanically positioned at the lock position by being engaged with the hook member rotated to the lock position,
A latch member that allows the hook member to rotate toward the unlock position by being rotated to the non-engagement position, and always urges the latch member in a direction to engage with the hook member. A spring, a first operating portion that is pushed in from the passenger compartment side, a second operating portion that is operated from the trunk room side, and the first operating portion and the second operating portion are mechanically connected to each other. A first position at which the first operation part can be pushed in from the passenger compartment side and the second operation part can be operated from the trunk room side; The retractable rear seat is movably retracted into a retractable rear seat back so as to be movable between a second position incapable of being operated from the vehicle compartment side and operable of the second operation portion from the trunk room side. Placed on the back A lock releasing means, the lock releasing means and the bracket, and the lock releasing means is located at an intermediate position between the first position and the second position. Alternatively, a turnover device that selectively moves to the second position and a lock release means that is rotatable about a third axis are arranged in the lock release means, and the lock release means moves from the first position to the intermediate position. When it is pushed, it is held in the engagement position and engages with the latch member to rotate the latch member to the non-engagement position against the biasing force of the spring. When it is moved in the direction, it is rotated around the third axis along with the engagement with the latch member,
And a pawl member that allows the latch member to engage with the hook member according to the urging force of the spring when the unlocking means is in the first position or the second position. Locking mechanism for retractable rear seat back.