JP4489677B2 - Seat back lock device for vehicle seat - Google Patents

Description

  The present invention relates to a seat back lock device for a vehicle seat. Specifically, the seat back of one of the plurality of seats arranged side by side in the vehicle width direction is engaged with an engaged portion that protrudes from the seat back of another seat adjacent to the seat. An engaging portion that is locked and received is provided, and the inclination angle position of the seat back of one seat is the same as the seat back of the other seat by the engagement lock between the engaging portion and the engaged portion. The present invention relates to a seat back lock device for a vehicle seat that can be held on the vehicle.

Conventionally, a rear seat of a vehicle may be provided with a so-called free hinge type seat (hereinafter referred to as a free seat) that does not have a reclining mechanism for adjusting a tilt angle of a seat back. The free seat is configured such that the seat back can tilt with respect to the seat cushion, but the seat back cannot be stopped at a certain tilt angle position only by the configuration of the seat alone. . Therefore, a technique has been proposed in which the seat back of this free seat can be held at a constant tilt angle position by engaging with the seat back of an adjacent seat provided with a reclining mechanism or the side wall of the vehicle body and leaning. ing.
As this type of related technique, the techniques disclosed in Patent Document 1 and Patent Document 2 can be cited. In these disclosed technologies, a lock device is provided on the seat back side portion of the free seat, and a striker that can be engaged and locked with the lock device is provided on the side wall of the vehicle body so as to protrude to the seat back side. . According to this configuration, by tilting the seat back toward the rear side of the vehicle, the lock device can be engaged and locked with the striker protruding from the side wall of the vehicle body, and the tilt angle of the seat back is maintained at this lock position. Can be kept.
Further, in the disclosed technique, when it is not necessary to hold the seat back at a certain tilt angle position, for example, the seat back is folded down to the seat cushion side, or the seat itself is slid forward in the vehicle. When doing so, the striker protruding from the side wall of the vehicle body can be folded and stored in conjunction with these operations. Thereby, when it is not necessary, it is possible to eliminate the protrusion by the striker so as not to get in the way.

Japanese Patent Laid-Open No. 10-194085 Japanese Utility Model Publication No. 61-78741

However, in the above-described conventional technique, when the free sheet is applied as a configuration in which the free sheet is engaged and locked to the seat back of the adjacent sheet, if the free sheet is further provided with an additional function such as a sheet storage mechanism, such a series of operations is performed. It sometimes caused problems.
For example, when a sheet storage mechanism is configured that allows a free sheet in a folded position to be flipped up to the adjacent sheet, the striker is stored in conjunction with the operation of setting the free sheet in a folded position. Therefore, it is possible to avoid interference between the free-seat raised up and the striker. However, if the seat tumble mechanism is provided with this seat storage mechanism, and a free seat and a seat adjacent to the seat storage mechanism are folded in a folded posture, the seat tumble mechanism can be lifted all at once. Since the striker is placed in the retracted state when the sheets are in the folded posture, both the sheets are not engaged and cannot be flipped up at the same time.

  The present invention was devised as a solution to the above-described problem, and the problem to be solved by the present invention is a configuration in which a seat back of a free sheet is engaged and locked with a seat back of an adjacent sheet. Even if this free sheet is further provided with additional functions such as a sheet storage mechanism and a sheet tumble mechanism, the series of operations can be performed without any trouble.

In order to solve the above problems, the seat back lock device for a vehicle seat of the present invention takes the following means.
First, the first invention is an engaged state in which a seat back of one of a plurality of seats arranged side by side in the vehicle width direction is provided to protrude from a seat back of another seat adjacent to the seat. An engagement portion that is received by being locked to the engagement portion is provided, and the inclination angle position of the seat back of one sheet is changed from the seat back of another sheet by the engagement lock between the engagement portion and the engaged portion. A seat back lock device for a vehicle seat that can be held at the same inclination angle position, and in a folded state in which the seat back of one seat is folded down to the seat cushion side, this seat is placed on the other adjacent seat side. A sheet storage mechanism that can be raised to the side and brought into a storage state, and a protrusion state that is provided so as to be interlocked with the operation of the sheet storage mechanism and that the engaged portion protrudes from the engagement portion so as to be engaged and lockable. Together A lock state switching mechanism that can be switched to a stored state that is impossiblely stored in the seat back, and the lock state switching mechanism is an operation that causes one seat in the folded state to be flipped up sideways by the seat storage mechanism. The engaged portion is set in the retracted state in conjunction with the movement of the engagement portion, and the engagement lock is possible if the engaged portion protrudes from the movement locus of the engaging portion when the posture state of one seat tilts the seat back. The engaged portion is set to the protruding state when the state is in the related position.
According to the first aspect, the engaged portion is in the retracted state when the one sheet in the folded state is flipped up to the other sheet side. Accordingly, it is possible to avoid interference between the one sheet to be flipped up and stored and the engaged portion. Further, the engaged portion is in the protruding state when the posture state of one sheet is in a relational position where the engaging portion and the engaged portion in the protruding state can be locked. Therefore, for example, the seat backs of both the sheets can be engaged and locked with each other by setting the other sheets to the folded state with respect to the one sheet in the folded state.

Next, in a second aspect based on the first aspect described above, the engaged portion is a striker provided so as to protrude toward the seat back of one seat, and the lock state switching mechanism starts the striker. It is connected to the hinge mechanism part that is connected so as to be able to turn over and the part that is displaced in accordance with the striker and the one-side-up movement of the one sheet. And an operation mechanism unit including an operation cable that is pulled by the operation to rotate the striker and put it in a retracted state.
According to the second aspect of the invention, the operation cable connected to the striker is pulled by an operation in which one sheet is flipped up sideways. Thereby, the striker made into the protrusion state rotates and it will be in a retracted state.

Next, according to a third aspect, in the second aspect described above, the sheet storage mechanism is provided so as to be interlocked with a jumping mechanism unit that connects one sheet so that it can be flipped up sideways, The space for allowing one sheet to be flipped up is secured by moving the one sheet, which is flipped up and stored in conjunction with the operation of causing one sheet to be flipped up sideways, away from the other seats in the vehicle width direction. And a moving mechanism portion that moves away from other seats in the vehicle width direction, and the operation cable of the operation mechanism portion is connected to a portion that moves away from the other seats in the vehicle width direction by the moving mechanism portion. It is what.
According to the third aspect of the invention, the operation cable is pulled and pulled into a portion that moves in a direction away from the other seat in the vehicle width direction as one seat is flipped up sideways. .

Next, according to a fourth aspect of the present invention, in the third aspect described above, the seat storage mechanism includes a node provided integrally with the vehicle floor or another seat, and a node provided integrally with the one seat. It consists of a four-joint link mechanism that is configured as an opposite joint of a fixed joint, and the connector joint arranged on the other sheet side in the four-joint link mechanism is the direction of rotation opposite to the direction in which one sheet jumps And a moving mechanism that moves away from other seats in the vehicle width direction.
According to the fourth aspect of the present invention, the jumping mechanism portion and the moving mechanism portion constituting the seat storage mechanism are included in the four-bar linkage mechanism that connects one seat and the vehicle floor or another seat. Is done. The operation cable is connected to the connector node constituting the four-bar linkage mechanism and is pulled.

Next, according to a fifth aspect of the present invention, in any one of the second to fourth aspects, the striker is stored in a rotational position state in which the striker is housed inside the seatback outer shape of another seat. It is set.
According to the fifth aspect of the invention, the striker that is provided so as to protrude from the seat back is brought into a retracted state by being rotated to a position where it is housed in the outer shape of the seat back. Therefore, the pull-in length required for the operation cable is sufficient to allow the striker to be rotated to the retracted position.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first invention, in the configuration in which one sheet (free sheet) is engaged and locked with the seat back of another adjacent sheet, a sheet storage mechanism, a sheet tumble mechanism, and the like are further added to the one sheet. Even if the function is provided, such a series of operations can be performed without any trouble.
Furthermore, according to the second invention, the configuration of the first invention can be realized by a relatively simple structure.
Furthermore, according to the third aspect of the present invention, it is easy to ensure a tensile displacement amount for pulling the operation cable by providing a structure that moves away from another fixedly installed sheet.
Furthermore, according to the fourth aspect, the configurations of the sheet storage mechanism and the lock state switching mechanism can be realized with a simpler structure.
Furthermore, according to the fifth aspect, since the pulling length of the operation cable necessary for putting the striker into the retracted state is short, the striker can be easily switched between the protruding state and the retracted state.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the seat back lock device for a vehicle seat according to the first embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of a vehicle seat, FIG. 2 is a perspective view showing a side flip-up storing operation of the free seat 1A, and FIG. 3 shows a folding operation of the free seat 1A and the reclining seat 1B. FIG. 4 is a side view showing the tumble storage operation of the free seat 1A and the reclining seat 1B, FIG. 5 is a perspective view showing the operation of switching the locked state of the striker 20, and FIG. 6 shows the connection structure of the striker 20. FIG. 7 is a side view showing an operation in which the lock state of the lock mechanism 10 is switched, FIG. 8 is a side view showing a state in which the lock mechanism 10 is switched to a release state, and FIG. It is a side view showing operation.

The vehicle seat of the present embodiment is applied as a rear seat of a vehicle as well shown in FIG. This rear seat is a so-called free hinge type seat (hereinafter, referred to as “free hinge type seat”) that does not have a reclining mechanism for adjusting the inclination angle of the seat back 2a, among the three seats arranged side by side in the vehicle width direction W. Free sheet 1A). The free seat 1A is configured such that the seat back 2a can tilt with respect to the seat cushion 3a. However, the seat back 2a cannot be stopped at a certain tilt angle position only by the configuration of the seat alone. It has become. However, the seat back 2a of the free seat 1A is configured so as to be engageable and lockable with a seat back 2b of a reclining seat (hereinafter referred to as a lycra seat) 1B having a reclining mechanism R adjacent to the back in the drawing of FIG. Yes. Therefore, the seat back 2a of the free seat 1A can be held at the same inclination angle position as the seat back 2b of the lycra sheet 1B by the same engagement lock. Here, the free sheet 1A corresponds to one sheet of the present invention, and the lycra sheet 1B corresponds to another sheet of the present invention.
The free seat 1A and the lycra seat 1B are arranged so that almost no gap is formed between their outer shapes so that the seating surface and the backrest surface of the entire rear seat are configured substantially continuously in the vehicle width direction W. It is arranged. Further, the free sheet 1A and the lycra sheet 1B are configured to be tiltable about their respective axes by the tilting shafts 4a and 4b set at coaxial positions.

Further, as shown in FIG. 2, the free seat 1A is released from the engagement lock with the lycra seat 1B when the seat is not used, and the seat back 2a is folded toward the seat cushion 3a (see FIG. 2). 2 in the imaginary line state), it can be moved up to the lycra sheet 1B side to be in the stowed state (solid line state in FIG. 2). The storage operation of the free seat 1A is performed in accordance with the operation of a seat storage mechanism (hereinafter referred to as storage mechanism) 30 provided between the lower portion of the seat cushion 3a and the lower portion of the seat cushion 3b of the lycra seat 1B. Then, by setting the free seat 1 </ b> A in a side-up state as described above, the vacated space can be used as a walk-through space or a cargo space.
On the other hand, the lycra seat 1B supports the free seat 1A with respect to the vehicle floor O by the storage mechanism 30 provided as described above. As shown in FIG. 4, when the lycra seat 1B is not used, the lycra seat 1B can be raised to the front of the vehicle with the seat back 2b folded to the side of the seat cushion 3b. . The storing operation of the lycra seat 1B is performed in accordance with the operation of the tumble mechanism T provided between the lower front end of the seat cushion 3b and the vehicle floor O. In this embodiment, when the lycra sheet 1B is stored, the free sheet 1A is engaged and locked with the lycra sheet 1B (see FIG. 1), or the free sheet 1A is folded without storing (see FIG. 3). Thus, as shown in FIG. 4, the free sheet 1A can be tumble-stored together. Then, by tumble storing the free sheet 1A and the lycra sheet 1B in this way, the vacated space can be widely used as a cargo space.

  By the way, the engagement lock between the seat back 2a of the free seat 1A and the seat back 2b of the lycra seat 1B is a hook-like lock mechanism 10 provided on the seat back 2a of the free seat 1A as shown in FIG. Is carried out by being engaged and locked to a gate-shaped striker 20 that protrudes from the seat back 2b of the lycra seat 1B. Here, the lock mechanism 10 corresponds to the engaging portion of the present invention.

Here, the striker 20 is provided on a side surface adjacent to the free seat 1A in the seat back 2b, and normally protrudes in the vehicle width direction W toward the seat back 2a side of the free seat 1A (virtual view of FIG. 5). Line state). As can be seen with reference to FIG. 2, the striker 20 has an outer shape of the seat back 2b when the lock mechanism 10 is not used in an engagement lock state, specifically when the free seat 1A is flipped up and stored. The storage state (the broken line state in FIG. 5) accommodated in the interior can be made. In the retracted state of the striker 20, the striker 20 is located on the inner side of the outer side surface B that forms the outer shape of the seat back 2b, as shown by the solid line in FIG. Here, as well shown in FIG. 5, a window hanger C that can cover the striker 20 in the retracted state is hung on the seat back 2b. This window hook C is formed of a thin rubber material having flexibility, and when the striker 20 is protruded, it is bent and deformed by being pushed out from the inside, so that the retracting and unfolding operation of the striker 20 is not hindered. It has a configuration. Further, as shown in FIG. 6, the storing operation of the striker 20 is performed by a lock state switching mechanism (hereinafter referred to as switching) that connects the striker 20 to the back frame F that forms the skeleton of the seat back 2b. This is performed in accordance with the operation of 40).
As shown in FIG. 2, the switching mechanism 40 is provided so as to be interlocked with the operation of the storage mechanism 30 described above, and rotates the striker 20 in conjunction with the storage operation of causing the free seat 1A to flip up. The storage state (broken line state in FIG. 2) is assumed. Thereby, the protrusion by the protrusion of the striker 20 can be eliminated, and interference between the free sheet 1 </ b> A and the striker 20 that is stored up and down can be avoided. In addition, the switching mechanism 40 is linked to the unfolding operation of returning the free sheet 1A in the flip-up storage state (the solid line state in FIG. 2) to the folded state (the virtual line state in FIG. 2) before the flip-up storage. The striker 20 is unfolded and rotated in the direction of returning, and the above-described protruding state (the phantom line state in FIG. 2) is obtained.
As described above, the switching mechanism 40 can switch the striker 20 between the retracted state and the protruding state in conjunction with the storing operation and the unfolding operation by the storing mechanism 30, but is not interlocked depending on other operations. The position state (lock state) can be maintained without switching. Accordingly, when the striker 20 is in a protruding state on the movement locus of the lock mechanism 10 when the posture state of the free seat 1A tilts the seat back 2a as shown in FIGS. 1 and 3, the engagement can be locked. Whenever it is in position, the striker 20 is maintained in a protruding state. That is, when the state is in the above-mentioned relational position, as can be seen with reference to the phantom line state in FIG. 3, for example, the seat back 2a of the free seat 1A in the folded state is tilted toward the vehicle rear side. Thus, when the striker 20 is in the protruding state, the lock mechanism 10 and the striker 20 can be engaged and locked. Alternatively, as can be seen with reference to the solid line state of FIG. 3, the locking mechanism 10 and the striker 20 are moved by tilting the seat back 2b of the lycra seat 1B toward the vehicle front side in the folded state of the free seat 1A. It is also in a state where the engagement can be locked.

Hereinafter, each component will be described in detail.
First, as well shown in FIG. 3, the lock mechanism 10 is provided on the side surface adjacent to the lycra seat 1B in the seat back 2a of the free seat 1A, and is accommodated inside the outer shape of the seat back 2a. The structure is exposed to the outside from the side and back of the back. Specifically, as well shown in FIG. 7, the hook member 11 formed so as to be engageable and lockable with the striker 20 is integrally attached to the back frame F constituting the skeleton of the seat back 2a by the rotating shaft 11a. It is attached to the supported bearing part 13 so as to be rotatable. As shown by the phantom lines in FIG. 1, the hook member 11 is configured such that the contact portion 11b formed in its jaw shape comes into contact with the striker 20 by pushing the lock mechanism 10 toward the striker 20. When it is pushed, it rotates counterclockwise as shown in FIG. As a result, as shown by the solid line in the figure, the hook member 11 is hooked on the striker 20 from the lower portion 11c formed by depression in the jaw shape. In this hooked state, the locking portion 11d formed at the rotating end of the hook member 11 is similarly connected to the support portion 13 so as to be rotatable about the rotating shaft 12b. Since the locking mechanism 10 is engaged with and locked to the striker 20, the locking mechanism 10 is held. Further, the support portion 13 functions as a stopper for the striker 20 that is pushed into the lock mechanism 10.
The engagement lock state of the lock mechanism 10 can be switched to the release state by performing a pulling operation of the release strap S provided at the shoulder opening position of the seat back 2a shown in FIG. That is, as clearly shown in FIG. 7, when the release strap S is pulled, the claw member 12 connected to the release strap S is rotated clockwise from the position shown by the solid line in FIG. . As a result, as shown in FIG. 8, the locked state between the claw member 12 and the hook member 11 can be removed. The hook member 11 can be urged and rotated in the release direction (clockwise direction) by the urging action of the spring member 14 connected between the two, so that the striker 20 is pushed away from the opening portion 11c. Thus, the engagement lock state between the lock mechanism 10 and the striker 20 can be released.
Note that, when the pulling operation of the release strap S is stopped, the hook member 11 is in a lockable state indicated by the phantom line in FIG. 7, so that the lock mechanism 10 is pushed again toward the striker 20. Thus, the engagement can be locked.

Next, as well shown in FIG. 6, the switching mechanism 40 includes a hinge mechanism portion 41 that connects the striker 20 having a gate shape to the back frame F so as to be able to be rotated up and down, and the root side of the striker 20. And an operation mechanism unit 42 that is connected to the part and rotates the striker 20 in conjunction with the storing operation and the unfolding operation by the storing mechanism 30 described above.
In the former hinge mechanism 41, a connecting member 41c joined integrally with the striker 20 is attached so as to be rotatable with respect to the rotation shaft 41a. Thereby, the striker 20 can be rotated around the rotation axis 41a between the solid line position and the virtual line position shown in FIG. A spring member 41b (spiral spring) is provided on the rotation shaft 41a of the hinge mechanism 41 to urge the striker 20 in the clockwise direction shown in FIG. Thereby, the striker 20 is urged | biased so that it may protrude in a free state.
The latter operation mechanism unit 42 includes an operation cable 42 a connected between the striker 20 and the storage mechanism 30. Specifically, one end of the operation cable 42a is connected to the base portion of the striker 20, and the other end is connected to the first connector node 33 of the storage mechanism 30 (see FIG. 9) described later. The first connector joint 33 rotates clockwise and pulls the operation cable 42a during the storing operation for storing the free sheet 1A. Here, as well shown in FIG. 6, the operation cable 42 a holds the striker 20 in the protruding state without pulling the striker 20 in the free state before the pulling operation (see FIG. 6). Virtual line state). Then, the operation cable 42 a acts to pull in the striker 20 by being pulled in accordance with the storing operation of the storing mechanism 30. As a result, the striker 20 is rotated counterclockwise against the rotation biased by the spring member 41b to be in the retracted state (solid line state in FIG. 6). The retracted state of the striker 20 is maintained while the operation cable 42a is being pulled.

Next, as shown in FIG. 9, the storage mechanism 30 includes a fixed node 31 provided integrally with the lycra sheet 1B, and an opposite node provided so as to be opposed to the fixed node 31 and provided integrally with the free sheet 1A. , And a first connector node 33 and a second connector node 34, respectively. Here, the first connector section 33 corresponds to the connector section of the present invention. Each of these nodes is formed in a plate shape that is elongated toward the back of the paper surface, and has a supporting strength that can support the free sheet 1A cantilevered with respect to the lycra sheet 1B by the four-link mechanism linked to the link. ing.
The storage mechanism 30 composed of the four-bar linkage mechanism turns the opposing node 32, which is integral with the free sheet 1A, to stand up in the counterclockwise direction from the unfolded position indicated by the phantom line in FIG. If it does, it will rotate so that the 1st connector node 33 arrange | positioned at the side of the lycra sheet | seat 1B may sink in the clockwise direction. Thereby, the opposing node 32 is rotated counterclockwise while being moved away from the lycra sheet 1B. As a result, when the free sheet 1A is in the standing posture by rotating the opposing node 32 (solid line state in FIG. 9), the vehicle width direction W (paper surface) is defined between the free sheet 1A and the lycra sheet 1B. A constant storage space A (inside left and right direction) can be formed. With this storage space A, it is possible to allow the free seat 1A, which is in a folded state and the seat thickness is increased, to be allowed to be flipped up and pivoted in the vehicle width direction W required to place the free seat 1A in the stored state. The storage space A can be secured. That is, the four-bar linkage mechanism constitutes a jumping mechanism unit that connects the free seat 1A so that it can be flipped up sideways, and a moving mechanism unit that moves the free seat 1A away from the lycra seat 1B in the vehicle width direction W. Has been. Here, the first connector joint 33 is formed in a curved plate shape that is curved toward the second connector joint 34 facing the first connector joint 33. As a result, when the free sheet 1A is stowed in the standing posture of the opposing node 32 (solid line state in FIG. 9), the first connector node 33 may be stored in a state where it overlaps with the fixed node 31 and the second connector node 34. It is possible to secure a wide storage space A in the height direction (vertical direction in the drawing) of the free sheet 1A that is stored and has a standing posture.
The first connector node 33 is integrally provided with a hook-shaped bracket 33a, and the other end of the operation cable 42a is connected to the bracket 33a. The operation cable 42a is in a free state without being subjected to a pulling operation at the unfolded position indicated by the phantom line in FIG. 9, that is, the state position before the free sheet 1A is stored. And the operation cable 42a is pulled by this 1st connector node 33 by the 1st connector node 33 rotating clockwise with the accommodation operation | movement of the free sheet | seat 1A (solid line state of FIG. 9). Thereby, as described above, the operation cable 42a pulls the striker 20 (see FIG. 6) and switches to the retracted state.

Subsequently, a method of using the present embodiment will be described.
First, as shown well in FIG. 1, the free seat 1A in a state in which the seat back 2a is engaged and locked to the seat back 2b of the lycra seat 1B as a seatable posture is flipped up to the lycra seat 1B side. A method for setting the storage state will be described. In this state, the lock mechanism 10 provided on the seat back 2a of the free seat 1A and the striker 20 provided on the seat back 2b of the lycra seat 1B are engaged and locked. Therefore, first, the release strap S provided at the shoulder position of the free sheet 1A is pulled. Thereby, the engagement lock state between the seat back 2a of the free seat 1A and the seat back 2b of the lycra seat 1B is released. Therefore, the free seat 1A can be brought into the folded state (the imaginary line state in FIG. 2) by moving the seat back 2a of the free seat 1A forward to the seat cushion 3a side. In the folded state of the free sheet 1A, the striker 20 is maintained in a protruding state. Next, the folded free sheet 1A is flipped sideways toward the lycra sheet 1B. Thus, the striker 20 is stored inside the outer shape of the seat back 2b in conjunction with the side flip-up operation of the free seat 1A. Therefore, the free sheet 1 </ b> A that has been flipped up can be brought into the housed state (solid line state in FIG. 2) without interfering with the striker 20. Here, if the unfolding operation | movement which returns the free sheet | seat 1A made into the accommodation state to the state (the imaginary line state of FIG. 2) before flipping up sideways is performed, the striker 20 will be in a protrusion state again. Therefore, by tilting the seat back 2a of the free seat 1A developed in the phantom line state of FIG. 2 toward the vehicle rear side, as shown in FIG. 1, the seat back 2b of the lycra seat 1B is engaged and locked. Can be made.
Next, a method for raising the lycra seat 1B together with the free seat 1A to the front side of the vehicle and placing it in the housed state will be described. That is, as well shown in FIG. 1, when the seat back 2a of the free seat 1A and the seat back 2b of the lycra seat 1B are engaged and locked as described above, the seat back 2b of the lycra seat 1B is placed on the seat cushion 3b side. By moving forward to the folded state, the free sheet 1A is also folded (the phantom line state in FIG. 4). Alternatively, as well shown in FIG. 3, in the folded state in which the seat back 2a of the free seat 1A is released from the engagement lock state with the seat back 2b of the lycra seat 1B as described above, The striker 20 can be engaged and locked with the lock mechanism 10 by bringing the back 2b forward and bringing it into the folded state (solid line state in FIG. 3). Therefore, as shown in FIG. 4, the free seat 1A or the lycra seat 1B is flipped up forward of the vehicle in the folded state where the seat back 2a of the free seat 1A and the seat back 2a of the lycra seat 1B are engaged and locked. Thus, both of them can be tumbled at the same time to be stored.

  Thus, according to the seat back lock device for a vehicle seat of this embodiment, the free seat 1A jumps sideways in a configuration in which the seat back 2a of the free seat 1A is engaged and locked with the seat back 2b of the adjacent lycra seat 1B. Even if the storage mechanism 30 that can be raised and stored, or the tumble mechanism T for jumping up and storing together with the lycra seat 1B, the series of operations can be performed without problems. Such a configuration can be realized by a relatively simple configuration in which the switching mechanism 40 that performs the pulling operation by the operation cable 42 a is linked to the storage mechanism 30. Furthermore, the storage mechanism 30 that allows the free seat 1A to be suitably flipped up and stored can be easily configured as a four-bar linkage mechanism. Further, the operation cable 42a is connected to the first connector section 33 of the four-bar linkage mechanism having a large rotational displacement, so that the striker 20 can be stored and unfolded in conjunction with the storage and unfolding operation of the free seat 1A. It can be done well.

Although the embodiment of the present invention has been described with one example, the present invention can be implemented in various forms in addition to the above example.
For example, the manner in which the lycra seat is moved together with the free seat and stored is not limited to the one that tumbles in the front direction of the vehicle. Various forms such as a storage state by being inserted can be adopted. Further, when the free seat is not moved and stored together with the lycra seat, the storage mechanism may be disposed not between the free seat and the lycra seat but between the vehicle floor.
Further, the mechanism for switching the striker between the protruding state and the retracted state is not limited to the configuration in which the striker is turned upside down. For example, the striker moves back and forth linearly according to the operation state of the operation cable. Various configurations such as a configuration to be moved can be applied.
In addition, the storage mechanism is shown as a four-bar linkage mechanism that functions as both a storage mechanism part and a movement mechanism part. However, the structure corresponding to the storage mechanism part such as a hinge mechanism and the movement of the slider mechanism, etc. It is good also as a structure which provided the structure corresponded to a mechanism part separately independently.

It is a perspective view showing the schematic structure of the vehicle seat. It is a perspective view showing the side-up and storing operation of the free seat. It is a perspective view showing folding operation of a free seat and a reclining seat. It is a side view showing the tumble storing operation of a free seat and a reclining seat. It is a perspective view showing the operation | movement by which the locked state of a striker is switched. It is a side view showing the connection structure of a striker. It is a side view showing the operation | movement by which the lock state of a lock mechanism is switched. It is a side view showing the state which switched the lock mechanism to the release state. It is a side view showing operation of a storage mechanism.

Explanation of symbols

1A Free sheet (one sheet)
1B Reclining seat (other seats)
2a, 2b Seat back 3a, 3b Seat cushion 4a, 4b Tilt shaft 10 Lock mechanism (engaging part)
DESCRIPTION OF SYMBOLS 11 Hook member 11a Rotating shaft 11b Contact part 11c Opening part 11d Locking part 12 Claw member 12a Claw part 12b Rotating shaft 13 Bearing part 14 Spring member 20 Striker 30 Sheet storage mechanism 31 Fixed node 32 Opposite node 33 1st connector Section (connector section)
33a Bracket 34 Second connector joint 40 Lock state switching mechanism 41 Hinge mechanism 41a Rotating shaft 41b Spring member 41c Connecting member 42 Operation mechanism 42a Operation cable C Window hanging R Reclining mechanism T Tumble mechanism W Vehicle width direction S Release strap F Back frame A Storage space O Vehicle floor B External side

Claims (5)

The seat back of one of the plurality of seats arranged side by side in the vehicle width direction is engaged and locked with an engaged portion that protrudes from the seat back of another seat adjacent to the seat. An engagement portion that is received is provided, and the inclination angle position of the seat back of the one sheet is set to the same inclination angle position as the seat back of the other sheet by the engagement lock between the engagement portion and the engaged portion. A vehicle seat back lock device that can be held,
A seat storage mechanism capable of causing the one seat to be stored in a folded state in which the seat back of the seat is folded down to the seat cushion side and then flipped sideways to the other adjacent seat side;
A protruding state in which the engaged portion is provided so as to be interlocked with the operation of the seat storage mechanism, and protruded so as to be engageable with the engaging portion; A lock state switching mechanism that can be switched to,
Have
The lock state switching mechanism sets the engaged portion in a retracted state in conjunction with an operation of causing the sheet storage mechanism to flip up one sheet in the folded state, and the posture state of the one sheet is a seat back. If the engaged portion is in a projecting state on the movement locus of the engaging portion when tilted, the engaged portion is in a projecting state when in a related position where the engagement can be locked. A seat back lock device for a vehicle seat. The vehicle seat backlock device according to claim 1,
The engaged portion is a striker provided to protrude toward the seat back of the one sheet,
The lock state switching mechanism is connected to a hinge mechanism portion for connecting the striker so that the striker can be rotated up and down, and a portion that is displaced in accordance with a lateral jumping operation of the striker and the one seat. And an operation mechanism portion configured to include an operation cable that is pulled by a lateral flip-up operation of the one sheet to rotate the striker to enter the retracted state. A seat back lock device for a vehicle seat. A seat back lock device for a vehicle seat according to claim 2,
The sheet storage mechanism is provided so as to be capable of interlocking with the jumping mechanism unit that couples the one sheet so that the sheet can be flipped up side by side, and in conjunction with the operation of causing the one sheet to be flipped up sideways. In order to secure a space for allowing the one seat to be flipped up and stored to move away from the other seat in the vehicle width direction to allow the one seat to be flipped up in the vehicle width direction. And a moving mechanism part that moves away from
The seat back lock device for a vehicle seat, wherein the operation cable of the operation mechanism unit is connected to a portion that moves away from the other seat in the vehicle width direction by the moving mechanism unit. A vehicle seat back lock device according to claim 3,
In the seat storage mechanism, a node provided integrally with a vehicle floor or the other seat is a fixed node, and a node provided integrally with the one seat is an opposite node of the fixed node. A connector mechanism disposed on the other sheet side of the four-bar link mechanism is rotated in a rotation direction opposite to the flip-up rotation direction of the one sheet, and is separated from the other sheet. A seat back lock device for a vehicle seat, comprising a moving mechanism that moves away in the vehicle width direction. A seat back lock device for a vehicle seat according to claim 2,
The seat back lock device for a vehicle seat, wherein the stowed state of the striker is set as a rotational position state in which the striker is housed inside a seat back outer shape of the other seat.

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