JP4635952B2 - Lock structure of retractable seat for vehicle - Google Patents

Description

  The present invention relates to a lock structure for a retractable seat for a vehicle. Specifically, the lock structure of the retractable seat for the vehicle is provided between the seat for the vehicle and the member on the vehicle body and can be engaged with and disengaged from the member on the vehicle body at the position where the seat is retracted. About.

2. Description of the Related Art Conventionally, some seats for vehicle seats employ a mechanism that allows a seat to be stored and moved when not in use to expand a cargo space. As such a storage mechanism, for example, a mechanism is known in which the seat back is tilted forward to the seat cushion side to place the seat in a folded posture, and the seat is raised to the side of the vehicle and held. Here, as a means for holding the seat in the retracted position where the seat is raised, there is known a type in which a holding belt provided on the seat is hooked on a hanging portion on the vehicle body side such as an assist grip. However, in the method using the holding belt, it takes time to perform the latching and removing operation.
Therefore, in order to simplify the operation, a lock structure that can automatically engage and lock the seat side member and the vehicle body side member by raising the seat to the retracted position is adopted. There is. Specifically, this lock structure is composed of a combination of a frame-shaped striker provided on the seat side and a lock mechanism portion provided on the vehicle body side. The lock mechanism has a receiving port for receiving a striker that approaches relatively as the seat is raised. The lock mechanism portion operates to automatically engage and lock the striker in conjunction with this movement when the striker is pushed into the receiving port.
However, in the above-described lock structure, when the seat raising position is shifted in the front-rear direction of the vehicle for some reason, the striker may not enter the receiving port of the lock mechanism portion and lock. In addition, when the striker and the lock mechanism are engaged and locked, the seat is shaken in the front-rear direction under the influence of traveling of the vehicle, so that the engagement lock between the two members is locked. A heavy load is applied. Thereby, for example, there is a possibility that an abnormal load in the pulling direction is applied to the cable for operating the striker to turn up and down, and the cable is damaged.
Therefore, in order to solve the above problems, it is conceivable to employ a structure that can absorb the above-described relative displacement of the pushing position in the striker or the lock mechanism. For example, Patent Document 1 below discloses a technique that employs a structure that absorbs the displacement of the pushing position in the striker. In this disclosed technique, the striker is pivotally supported so as to be pivotable up and down, and is urged by a torsion spring in the upward pivoting direction lockable with the lock mechanism. As a result, the striker is held by the urging force at the raised rotation position that contacts the stopper. Here, the rotation restricting position by the stopper is originally set to a position that exceeds the reference rotation position where the striker enters and locks into the receiving opening of the lock mechanism portion. In accordance with this, the receiving port of the lock mechanism portion that receives the striker is also set to have a broadened guide surface that serves as a guide surface in order to receive the striker at an excessively advanced position. Thereby, even when the position where the striker enters deviates from the reference rotation position, the displacement of the relative pushing position is absorbed along with the elastic deformation of the torsion spring so that the deviation of the pushing position of the striker is corrected. become. In addition, when the striker and the lock mechanism are engaged and locked, even if a relative displacement occurs between the striker and the lock mechanism, the displacement is absorbed by the elastic deformation of the torsion spring. Become.

JP 2005-263007 A

  However, in the lock structure employing the above disclosed technique, the striker absorbs the relative displacement only in the rotation direction against the bias of the torsion spring. For this reason, the reference rotation position where the striker enters the lock mechanism entrance is set to a position where the striker is largely retracted relative to the restriction position by the stopper, and the reverse rotation is performed according to the amount of the rotational displacement that is returned. The relative displacement in the direction can be absorbed. Therefore, the receiving shape of the lock mechanism that receives the striker must also be set so that the guide surface is widened in order to receive the striker in an excessively advanced position.

  The present invention has been devised as a solution to the above-described problem, and the problem to be solved by the present invention is that the engagement member provided on the seat side member and the reference rotation position of the standing posture. Relative to the engaged member provided on the vehicle body side so that an abnormal load is not applied to the holding means and the size of the structure is not increased. An object of the present invention is to make it possible to suitably absorb the displacement.

In order to solve the above problems, the retractable seat locking structure for a vehicle according to the present invention takes the following means.
First, the first invention is a retractable type for a vehicle which is provided between a seat for a vehicle and a member on the vehicle body side and can be engaged with and disengaged from the member on the vehicle body side at a position where the seat is retracted and moved. The seat locking structure includes an engagement member provided on a member on the seat side, and an engaged member provided on a member on the vehicle body side that is configured to be engageable and lockable with the engagement member. Then, the engaging member and the engaged member move relatively closer together with the retracting movement of the sheet, and the other member is relatively pushed into the receiving port formed in the one member. It is configured to operate so that the member on one side is engaged and locked with the member on the other side in conjunction with the movement, and the engaging member is pivotally supported by the member on the seat side so that it can be turned upside down. , A predetermined standing posture reference that can be engaged and locked with the engaged member by rotating up and down. It can be switched between the moving position and the rotation position of the retracted posture that is retracted according to the shape of the seat, and is provided between the seat side member when the seat is moved and retracted The holding member holds the engaging member in a state where it is raised from the rotation position in the retracted posture to the reference rotation position in the standing posture, and is further held in the reference rotation position in the standing posture. In association with the engaging member, there is provided a rotational displacement absorbing means capable of absorbing and allowing relative rotational displacement in both forward and reverse directions with respect to the reference rotational position of the standing posture of the engaging member by elastic deformation. The rotational displacement absorbing means is engaged with the engagement member along the shape of the receiving port when a relative rotational position shift occurs between the engagement member and the engagement member. Forced while rotating to the position where it engages and locks with the joint member While I am allowing the rotational displacement of the pushed so, and corrects the deviation of the relative rotational position occurring between the engaged member.
According to the first aspect of the invention, when the seat is retracted, the engaging member provided on the seat side member is held in a state where it is raised to the reference rotation position of the standing posture by the holding means. Therefore, when there is no relative rotation position shift between the engaging member and the engaged member, the engaging member is automatically pushed into the engaged member as the sheet is retracted. Engagement locks. Further, when the above-described deviation occurs, the rotational displacement in the direction for correcting the displacement of the engaging member is allowed by the rotational displacement absorbing means. As a result, the engaging member is pushed into the engaged member while being forcibly rotated along the shape of the receiving port as the sheet is retracted, and is automatically engaged and locked therewith. .
In a state where the engaging member and the engaged member are engaged and locked, even if a load that causes a relative rotational position shift between them is applied, the rotational displacement absorbing means engages the engagement member. A rotational displacement in the displacement direction of the member is allowed. That is, the rotational displacement absorbing means absorbs the above-described deviation without an abnormal load acting between the engaging member and the holding means for holding the engaging member at the reference rotational position in the standing posture.

Next, in a second aspect based on the first aspect described above, the engaging member is connected to an operation cable that is pulled when the seat is retracted, and the engaging member is retracted by pulling the operating cable. The rotation displacement absorbing means is a rubber member provided between the engagement member and the seat side member, which is pulled up from the rotation position of the posture to the reference rotation position of the standing posture. And a tension spring provided so as to be interposed in the pulling path of the operation cable, and the rubber member is in a standing posture by abutting the engaging member biased in the turning direction raised by the pulling of the operation cable The engagement member held at the reference rotation position of the standing posture is arranged so that the one-way rotation displacement is elastically deformed in the tension direction of the tension spring. As permissible by And Tsu, characterized in that the rotational displacement in the reverse direction is to be permitted by the elastic deformation due to the pressing of the rubber member.
According to the second invention, the rotational displacement of the engaging member in one direction is absorbed by the elastic deformation of the tension spring. Thereby, the shift | offset | difference of a rotation position is absorbed, without an abnormal load acting between an engagement member and an operation cable. Further, the rotational displacement of the engaging member in the reverse direction is absorbed by the elastic deformation of the rubber member as the holding means. Thereby, the shift | offset | difference of a rotation position is absorbed, without an abnormal load acting between an engagement member and a holding means.

Next, in a third aspect based on the first aspect described above, the rotational displacement absorbing means comprises a spring member and a rubber member provided between the engaging member and the seat side member. The rubber member is disposed in a direction to urge the engaging member in the raising rotation direction. The engaging member, which is arranged as a holding means for holding in the moving position and is held in the reference rotation position of the standing posture, is elastically deformed in one direction against the bias of the spring member. The rotational displacement in the opposite direction is allowed by elastic deformation accompanying the pressing of the rubber member.
According to the third invention, the rotational displacement of the engaging member in one direction is absorbed by the elastic deformation of the spring member. Further, the rotational displacement of the engaging member in the reverse direction is absorbed by the elastic deformation of the rubber member as the holding means. Thereby, the shift | offset | difference of a rotation position is absorbed, without an abnormal load acting between an engagement member and a holding means.

Next, according to the fourth invention, the engaging member is a frame-shaped striker, and the engaged member is a lock mechanism portion having an operation mechanism capable of engaging and locking with the frame-shaped striker. It is characterized by.
According to the fourth aspect of the invention, since the frame-shaped striker is configured to be turned upside down, the structure is simplified as compared with the case where the lock mechanism portion is turned upside down. For example, when the lock mechanism portion is configured to be turned upside down, a large storage space is required for storing the lock mechanism portion in the seat shape. In addition, a mechanism for rotating the lock mechanism portion upside down becomes large. Furthermore, when a cable member for switching the operation of the lock mechanism portion is provided, it is necessary to devise a configuration so that the cable member is not operated in an unexpected manner in conjunction with the up-and-down rotation of the lock mechanism portion. .

The present invention can obtain the following effects by taking the above-described means.
First, according to the first aspect of the present invention, by providing the rotational displacement absorbing means for allowing the rotational displacement in both the forward and reverse directions from the reference rotational position of the engaging member, the engagement member and the holding means are provided. It is possible to suitably absorb the shift of the relative rotational position generated between the engaged member and an abnormal load in between. Since the engaging member can be rotated and displaced in both the forward and reverse directions from the reference rotation position, the swing width of the engaging member can be suppressed, and the size of the structure can be prevented from being increased. .
Furthermore, according to the second aspect of the present invention, the rotational displacement absorbing means is embodied as a relatively simple structure using a tension spring and a rubber member in the structure in which the engaging member is raised by pulling the operation cable. be able to.
Furthermore, according to the third aspect of the present invention, in the structure of the type in which the engaging member is raised by the bias of the spring member, the rotational displacement absorbing means is realized as a relatively simple structure using the spring member and the rubber member. Can be
Furthermore, according to the fourth aspect of the present invention, the structure can be simplified as compared with the case where the lock mechanism portion is rotated upside down by adopting a configuration in which the frame-shaped striker is rotated upside down.

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

  First, the lock structure of the retractable seat for a vehicle according to the first embodiment will be described with reference to FIGS. FIG. 1 is a perspective view schematically showing a lock structure of a retractable seat for a vehicle. FIG. 2 is a perspective view showing a state in which the striker 11 is turned upside down. FIG. 3 is a configuration diagram of the seat 1 in the retracted posture state as viewed from the rear side. FIG. 4 is a configuration diagram illustrating a state in which the striker 11 is rotationally displaced in one direction from the reference rotational position of the standing posture. FIG. 5 is a configuration diagram illustrating a state in which the striker 11 is rotationally displaced in the reverse direction from the reference rotational position of the standing posture. FIG. 6 is a configuration diagram illustrating a state in which the striker 11 and the lock mechanism unit 20 are engaged and locked. FIG. 7 is a configuration diagram showing a state in which the leg member 31 is pivoted up and down.

The vehicle retractable seat locking structure described in this embodiment is provided between the seat 1 and the vehicle body panel P on the outer side O, as well shown in FIG. The seat 1 is provided with a retracting mechanism so that when the seat 1 is not used, a retracting operation in which the seat 1 is folded and raised on the outer side O of the vehicle can be performed. Here, the state of the folding posture of the seat 1 is a posture state in which the seat back 2 is tilted forward to the seat cushion 3 side. The folded state of the seat 1 is represented by a solid line in FIG. 1, and the retracted posture state of the sheet 1 is represented by an imaginary line in FIG. Thus, by storing and moving the seat 1, the floor space in which the seat 1 is installed can be expanded and effectively used as a cargo space.
And the lock | rock structure of the retractable seat for vehicles of a present Example becomes a structure which can carry out the engagement lock of the vehicle body panel P of the outer side O automatically by raising the seat | 1 to the storing position. ing. This lockable structure of the retractable seat for a vehicle includes a combination of a striker mechanism portion 10 provided on the seat 1 side and a lock mechanism portion 20 provided on the vehicle body panel P side. Hereinafter, these configurations will be specifically described.

First, the configuration of the seat 1 will be described with reference to FIG.
That is, the seat 1 includes a reclining device 4 and can perform a reclining operation such as forward or backward tilting of the seat back 2 around the rotation shaft portion 4r. The seat 1 is fixed on the floor F by a tumble mechanism 5 provided at the lower right side of the seat cushion 3 and a folding leg mechanism 30 provided at the lower left side.

Here, the tumble mechanism 5 hinges the seat cushion 3 and the floor F. As a result, the seat 1 lies on the floor F around the rotation shaft portion 5r (the position in the solid line state) and the standing position (in the virtual line state in the imaginary line state) raised from the floor F to the outer side O of the vehicle. The position can be turned up and down.
Further, the tumble mechanism 5 is assembled with a torsion spring (not shown) that urges the seat 1 in the turning direction to raise the seat 1 from the floor F. The torsion spring is assembled in a pre-twisted state, and the seat 1 can be automatically lifted from the floor F by the urging force accompanying the restoration.

The folding leg mechanism 30 includes a leg member 31 and a leg lock mechanism 34.
Specifically, as shown in FIG. 7, the leg member 31 has a substantially plate shape and is pivotally supported on the lower surface side of the seat cushion 3 by the rotating shaft portion 33. As a result, the leg member 31 can be turned upside down between the unfolded position standing vertically on the lower side of the seat cushion 3 and the storage position folded so as to overlap the lower surface side of the seat cushion 3. It is said that. Here, the unfolded position of the leg member 31 is represented by a solid line in FIG. And the storage position of the leg member 31 is represented by the state of the virtual line. In addition, a torsion spring (not shown) that urges the leg member 31 in a turning direction that folds the leg member 31 on the lower surface side of the seat cushion 3 is assembled to the turning shaft portion 33. The torsion spring is assembled in a pre-twisted state, and the leg member 31 is automatically folded on the lower surface side of the seat cushion 3 by the urging force accompanying the restoration.
Next, the leg lock mechanism 34 is provided at the front and rear end positions of the leg member 31. The leg lock mechanism 34 is configured to be detachable from the striker S installed on the floor F. Therefore, by engaging the leg lock mechanism 34 with the striker S, the leg member 31 can be locked on the floor F side in a state where the leg member 31 is erected at the deployed position. Thereby, the raising rotation of the seat 1 by the above-described tumble mechanism 5 can be restricted, and the state where the seat cushion 3 is laid down on the floor F with the leg member 31 as a support can be maintained. The leg lock mechanism 34 operates to release the engagement state with the striker S by operating an operation member (not shown) provided at a predetermined position of the seat 1. Therefore, when the seat 1 is raised from the floor F, the seat 1 can be raised to the outer side O by performing the above-described operation to release the engagement state between the leg lock mechanism 34 and the striker S. State. Accordingly, the seat 1 is automatically raised from the floor F, and the leg member 31 is automatically folded from the deployed position to the storage position.

Next, the configuration of the striker mechanism unit 10 will be described.
That is, the striker mechanism portion 10 is disposed at a lower position on the inner side I on the back side of the seat back 2, as shown in FIG. As shown in FIG. 2, the striker mechanism unit 10 includes a striker 11, a shaft member 12, a torsion spring 13, an operation cable 14, a tension spring 15, and a rubber member 16. Each of these members is assembled to a substrate portion 17 provided integrally with the skeleton of the seat back 2.
Specifically, the striker 11 is formed in a gate-shaped frame shape, and has a configuration in which a mounting bracket is integrally assembled at a foot portion thereof. The striker 11 is pivotally supported on the substrate portion 17 by the shaft member 12 so as to be rotatable up and down.
A torsion spring 13 is provided between the striker 11 and the substrate portion 17. In a state where the torsion spring 13 is wound around the shaft member 12, one end thereof is hooked to the bracket portion of the striker 11, and the other end is hooked to the substrate portion 17. The torsion spring 13 is assembled in a state of being pre-twisted, and the striker 11 is automatically brought down to the rotation position of the inclining posture corresponding to the shape of the seat back 2 by the urging force accompanying the restoration. It has come to include. Here, as can be seen with reference to FIG. 4, the back portion of the seat back 2 on which the striker mechanism 10 is disposed has a concave shape. Further, the striker 11 is formed in a curved shape in which the supporting arm portions 11b on both sides constituting the gate shape are directed in the radial direction of the shaft member 12, and the foot portion attached to the bracket is deviated from the radial direction. Yes. Thereby, the striker 11 that has been brought down is stored in a state that does not protrude from the shape of the seat back 2.
Next, as shown in FIG. 2, the operation cable 14 is connected to the bracket portion of the striker 11 through a tension spring 15 at one end side. The operation cable 14 is pulled when the seat 1 is retracted. That is, as shown in FIG. 7, the operation cable 14 is connected to a bracket 35 whose other end is rotated and displaced by the rotation of the leg member 31 of the folding leg mechanism 30 described above. The bracket 35 is pivotally supported by the pivot shaft 33 in the same manner as the leg member 31. The bracket 35 comes into contact with the push pin 32 that protrudes from the leg member 31 when the leg member 31 is folded. As a result, the bracket 35 rotates together with the leg member 31 and pulls the operation cable 14. That is, when the seat 1 is retracted, that is, when the engagement between the leg lock mechanism 34 and the striker S (see FIG. 1) is released, the operation cable 14 automatically folds the leg member 31 to the storage position. It is towed by the movement that is being carried. Then, returning to FIG. 2, when the operation cable 14 is pulled as described above, the striker 11 rotates in a posture of standing up from the back of the seat back 2 against the bias of the torsion spring 13. It is raised up to.

Accordingly, when the seat 1 is retracted, the striker 11 is raised by the pulling of the operation cable 14 from the rotation position in the retracted position (the position in the virtual line state) to the reference rotation position in the standing position (the position in the solid line state). It is held as a raised state. Specifically, when the striker 11 is raised by pulling the operation cable 14, the contact portion 11 c formed on the leg portion comes into contact with the rubber member 16 installed on the substrate portion 17. Here, as shown in FIG. 4, the rubber member 16 is fixed to the rubber member 16 by inserting the leg portion into an attachment hole 17 h formed in the substrate portion 17. As a result, the striker 11 stops at the reference rotation position (solid line position) of the standing posture by the action of both the pulling force of the operation cable 14 (the restoring force of the tension spring 15) and the elastic force of the rubber member 16. Will be in a state.
The raised striker 11 moves relatively closer to the lock mechanism unit 20 waiting on the vehicle body panel P side as the seat 1 is retracted. As shown in FIG. 6, when the approaching movement of the striker 11 is not shifted to the receiving port 21 a formed in the locking mechanism unit 20, the striker 11 is directly received by the receiving port of the locking mechanism unit 20. 21a enters and locks with the lock mechanism 20 automatically. Here, as shown in FIG. 3, the lock mechanism 20 is provided with the receiving port 21 a directed obliquely upward. The engaging arm portion 11a of the striker 11, that is, the arm portion entering the receiving port 21a of the lock mechanism portion 20 is also inclined so as to be able to enter the receiving port 21a directed obliquely upward. Is formed.

Next, the configuration of the lock mechanism unit 20 will be described.
That is, as shown in FIG. 3, the lock mechanism portion 20 is disposed inside a concave recess Ph formed in the vehicle body panel P. As shown in FIG. 4, the lock mechanism unit 20 includes a substrate member 21, a hook member 22, a hooking claw member 24, and an operation cable 26.
Specifically, the substrate member 21 is fixed integrally with the vehicle body panel P, and structural members such as the hook member 22 and the hooking claw member 24 are assembled thereto. The board member 21 is formed with a receiving port 21a that can receive the striker 11. The receiving port 21a is formed in a shape that widens the diameter in the opening direction, and a guide surface G that guides the striker 11 toward the inside of the receiving port 21a is formed so as to expand. And the receiving port 21a becomes a shape which can receive the striker 11 which entered the inside, as FIG. 6 shows.
Next, the hook member 22 is formed in a jaw shape that can be engaged and locked with the striker 11, and is pivotally supported by the substrate member 21 by the pivot shaft portion 23. The hook member 22 rotates in such a manner that the upper jaw portion 22a of the jaw shape is pushed into the striker 11 as it enters the receiving port 21a. Thereby, the hook member 22 takes a posture state in which the engaging portion 11a of the striker 11 is received between the upper jaw portion 22a and the lower jaw portion 22b. Further, as can be seen with reference to FIG. 4, the hook member 22 is rotated from the state in which the striker 11 is received to the direction in which the striker 11 is pushed out by the upper jaw portion 22a, thereby moving the striker 11 to the outside of the receiving port 21a. Can be extruded. Here, on the outer peripheral surface portion of the hook member 22, a protruding portion 22c having a shape protruding from the outer peripheral surface portion in a step shape is formed.
Next, the hooking claw member 24 is pivotally supported on the substrate member 21 by the pivot shaft 25 parallel to the pivot shaft 23 described above. A tension spring 27 is stretched between the hooking claw member 24 and the hook member 22. As a result, the hooking claw member 24 is always attracted to the outer peripheral surface portion of the hook member 22 by the urging force of the tension spring 27 and is held in contact therewith. In relation to this, the hook member 22 is also held in a posture state in which the hook member 22 is normally rotated in the direction in which the striker 11 is pushed out by the upper jaw portion 22a by the urging force of the tension spring 27. Thereby, the hook member 22 is in a posture state in which the upper jaw portion 22a is exposed to the receiving port 21a.

  Therefore, as shown in FIG. 4, when the striker 11 enters the interior of the receiving port 21a as the seat 1 is retracted, the striker 11 moves to the upper jaw of the hook member 22 exposed to the receiving port 21a. 22a abuts. Then, when the striker 11 further enters the interior of the receiving port 21a, the upper jaw portion 22a of the hook member 22 is rotated in such a manner that the upper jaw portion 22a is pushed into this. As a result, as shown in FIG. 6, the striker 11 is received between the upper jaw portion 22a and the lower jaw portion 22b of the hook member 22, and the engaging arm portion 11a surrounds them by the shape of the receiving port 21a. It will be in a state of being caught. Further, the hooking claw member 24 slides along the outer peripheral surface portion of the hook member 22 in accordance with the movement of the hook member 22 rotating, and falls into the step of the projection 22c. As a result, the hook member 22 is in a state where its rotation in the opposite direction is restricted by the hooking claw member 24. That is, the hook member 22 is held in a posture state in which the engaging arm portion 11a of the striker 11 is enclosed and locked in the receiving port 21a.

Next, the operation cable 26 is connected to the hooking claw member 24 at one end side thereof. The part on the other end side of the operation cable 26 is connected to an operation lever (not shown) provided at a predetermined position on the vehicle body panel P side. Thereby, the operation cable 26 is pulled by the operation of the operation lever. Then, when the operation cable 26 is pulled, as can be seen with reference to FIG. 4, the hooking claw member 24 is rotated against the urging force of the tension spring 27 and falls into the step of the projection 22c. Be raised. As a result, the hook member 22 is released from the rotation restricted state by the hooking claw member 24 and is rotated in a direction to push the striker 11 out of the receiving port 21a by the biasing force of the tension spring 27. As a result, the hooking claw member 24 again rides on the step of the protrusion 22c of the hook member 22, and the engagement lock between the striker 11 and the lock mechanism 20 is released.
If the operation lever is stopped while the engagement lock between the striker 11 and the lock mechanism unit 20 is released, the striker 11 can be engaged and locked again with the lock mechanism unit 20.

Here, referring to FIG. 2, as described above, the striker 11 stands up from the rotation position (the position in the imaginary line state) of the retracted posture by pulling the operation cable 14 when the seat 1 is retracted. It is held in a state where it is raised to the reference reference rotation position (position in the solid line state). The reference rotation position of the standing posture is, as shown in FIG. 6, when the approaching movement of the striker 11 accompanying the retracting movement of the seat 1 is not shifted to the center of the receiving port 21 a of the lock mechanism unit 20. The striker 11 is set in advance as a position where the striker 11 enters the receiving port 21a of the lock mechanism portion 20 as it is and is engaged and locked.
However, as shown in FIGS. 4 and 5, when the seat 1 is retracted, for some reason, the approaching movement of the striker 11 is the longitudinal direction of the vehicle with respect to the center of the receiving port 21a (the horizontal direction in the drawing). It may go to a position shifted to In this case, in order to put the striker 11 into the receiving port 21a, it is necessary to correct this relative rotational position shift. In the present embodiment, this relative rotational position shift can be corrected by the rotational displacement absorbing structure by the striker mechanism section 10. Hereinafter, the rotational displacement absorbing structure will be described in detail.

That is, as shown in FIGS. 4 and 5, the striker mechanism unit 10 is in an upright posture in which the striker 11 comes into contact with the rubber member 16 when the operation cable 14 is pulled as the seat 1 is retracted. Is raised to the reference rotation position (solid line position). As a result, the striker 11 becomes stationary at this rotational position by the action of both the pulling force of the operation cable 14 (the restoring force of the tension spring 15) and the elastic force of the rubber member 16.
Therefore, as shown in FIG. 4, when the striker 11 is in a positional relationship that is shifted rearward (rightward in the drawing) relative to the receiving port 21a, the striker 11 is directed directly toward the receiving port 21a. As it moves closer, the engaging arm portion 11a comes into contact with the guide surface G at a position eccentric from the center of the receiving port 21a. Then, when the striker 11 is moved closer as it is, the striker 11 comes into contact with the guide surface G and receives the receiving port while being rotationally displaced in the direction toward the center of the receiving port 21a along the shape of the guide surface G. It is forcibly pushed into the inside of 21a. That is, when the striker 11 is held at the reference rotation position of the standing posture, the rotational displacement in the above direction is caused by the elastic deformation in the tensile direction of the tension spring 15 provided between the operation cable 14 and the striker 11. It is designed to be absorbed.
Further, as shown in FIG. 5, even when the striker 11 is in a positional relationship that is shifted forward (leftward in the drawing) relative to the receiving port 21 a, the striker 11 has the shape of the guide surface G. Along with a rotational displacement in a direction toward the center of the receiving port 21a along the forcibly, it is forced into the receiving port 21a. That is, when the striker 11 is held at the reference rotation position of the standing posture, the rotational displacement in the above direction is absorbed by the elastic deformation accompanying the pressing of the rubber member 16 in contact with the striker 11. It has become.
Therefore, even when the approaching movement of the striker 11 is in a positional relationship deviated from the center of the receiving port 21a as described above, the shift of the relative rotational position is corrected, and the striker 11 is directly locked. The part 20 can be engaged and locked.

  Referring to FIG. 6, when the striker 11 and the lock mechanism 20 are engaged and locked, a relative rotational position shift occurs between the two in the front-rear direction of the vehicle (the left-right direction in the drawing). Even if a load is applied, the above-described rotational displacement absorbing structure allows the rotational displacement of the striker 11 in the shifting direction. Thereby, the above-described deviation can be absorbed without applying an abnormal load between the striker 11 and the rubber member 16 or the operation cable 14.

Subsequently, a method of using the present embodiment will be described.
That is, in the initial state, the seat 1 is held in a posture state in which the seat 1 can be seated on the floor F. In this initial state, the seat cushion 3 is held in a posture in which the seat cushion 3 is lying on the floor F, and the seat back 2 is held in a posture state in which the seat back 2 stands up from the seat cushion 3. Further, the striker 11 is in a state of being pushed down in accordance with the shape of the seat back 2. Therefore, in order to raise the seat 1 in this state to the outer side O of the vehicle, the leg lock mechanism 34 is released with the seat 1 in the folded posture. As a result, as shown in FIG. 3, the seat 1 is raised from the floor F by the urging force of a torsion spring (not shown) provided in the tumble mechanism 5. As the seat 1 is retracted, the striker 11 is raised to the reference rotation position of the standing posture. Therefore, by raising the seat 1 as it is, the striker 11 can be engaged and locked with the lock mechanism unit 20 waiting on the vehicle body panel P side. As a result, the seat 1 can be held in a retracted posture in which the seat 1 is raised.
In order to return the seat 1 to the original seating posture, first, an operation lever (not shown) provided at a predetermined position on the vehicle body panel P side is operated. Thereby, the engagement lock state of the striker 11 and the lock mechanism part 20 can be cancelled | released. Here, as shown in FIG. 3, a resilient rubber R that comes into contact with the seat 1 when the seat 1 is raised is attached to the vehicle body panel P. The elastic rubber R is configured to elastically receive the raised seat 1, and in a state in which the striker 11 and the lock mechanism portion 20 are engaged and locked, the seat rubber 2 is crushed. It becomes. Therefore, when the engagement lock state between the striker 11 and the lock mechanism portion 20 is released, the rubber member 16 is pushed back in the direction in which the seat back 2 is brought down by its elastic action. Thereby, it is possible to give a boost to the operation of dropping the seat 1 from the storage position. Then, the seat 1 is brought down on the floor F, and the leg member 31 is developed by manual operation. Thereby, the striker 11 that has been erected can be brought down according to the shape of the seat back 2. Then, by engaging and locking the leg lock mechanism 34 of the leg member 31 that has been deployed earlier to the striker S on the floor F side, the seat 1 can be brought into a posture state in which the seat 1 is lying on the floor F.

  Thus, according to the lockable structure of the retractable seat for a vehicle of the present embodiment, the structure for absorbing the rotational displacement that allows the rotational displacement of the striker 11 in both the forward and reverse directions from the reference rotational position is provided. Accordingly, the relative rotational position shift generated between the striker 11 and the rubber member 16 or the operation cable 14 and the receiving port 21a of the lock mechanism unit 20 is preferably performed without applying an abnormal load. Can be absorbed into. Since the striker 11 can be rotationally displaced in both forward and reverse directions from the reference rotational position, the swing width of the striker 11 can be suppressed and the guide surface G can be made compact. This rotational displacement absorbing structure can be realized by a relatively simple configuration using the tension spring 15 and the rubber member 16.

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, as shown in FIG. 8, the rubber member T may be fixed to the striker 11 side and contacted with the substrate portion 17. In this modified embodiment, a part of the substrate portion 17 is peeled up to form a receiving piece 17t, and the rubber member T that rotates and approaches the striker 11 contacts the receiving piece 17t in the normal direction. It comes to touch.
Further, as shown in FIG. 9, the structure for absorbing the rotational displacement of the striker 11 may be a turnover type configuration using a tension spring 19. In this modified embodiment, the tension spring 19 is arranged in a state in which it is directed in the radial direction of the shaft member 12 serving as the rotation center of the striker 11. As a result, the striker 11 is swung in both the forward and reverse directions from this state, assuming that the shaft member 12 and the tension spring 19 are arranged in a straight line as the state of the reference rotation position of the standing posture. It is allowed by the elastic deformation of the tension spring 19 in the tension direction. Therefore, in the case of this configuration, a rubber member for receiving the striker 11 as shown in the above embodiment is not necessary.
In addition, as shown in FIG. 10, the striker 11 is urged in the turning direction to be raised, contrary to the above-described embodiment, and is always brought into the collapsed posture position by hooking the hook U. It is good also as a structure to hold | maintain. In this modified embodiment, a cable (not shown) that is pulled when the seat 1 is retracted is connected to the hook U, and the hook U is detached by pulling the cable. Thereby, the striker 11 can be automatically raised to the reference rotation position of the standing posture. Specifically, as shown in FIG. 11, the striker 11 is in a standing posture by the action of both the urging force of the torsion spring 18 and the elastic force of the rubber member 16 that raises and urges the striker 11 in the turning direction. It will be in the state where it stopped at the reference rotation position. Here, the torsion spring 18 corresponds to a spring member of the present invention. The striker 11 is allowed to be rotated in both the forward and reverse directions from the reference rotation position of the standing posture by the elastic deformation in which the torsion spring 18 is twisted and the elastic deformation accompanying the pressing of the rubber member 16. Become.
Moreover, it is good also as a structure which reverses the arrangement | positioning relationship between a striker and a lock mechanism part, and rotates the lock mechanism part upside down. However, in this case, a large storage space for storing the lock mechanism portion in the seat back shape is required. In addition, a mechanism for rotating the lock mechanism portion upside down becomes large. Furthermore, when an operation cable for switching the operation of the lock mechanism portion is provided, it is necessary to devise a structure so that the operation cable is not operated in unison with the up-and-down rotation of the lock mechanism portion. .
In addition, the lock mechanism portion that engages and locks the striker is a manual lock type that is locked in conjunction with the movement of the striker to move closer. However, for example, an auto-lock type that is locked by electrical control so as to automatically engage and lock the striker by moving the striker closer can also be applied.

1 is a perspective view schematically showing a lock structure of a retractable seat for a vehicle. It is a perspective view showing signs that a striker turns up and down. It is the block diagram which looked at the storing posture state of a sheet from the back side. It is the block diagram showing a mode that the striker rotationally displaced in one direction from the reference | standard rotation position of a standing posture. It is the block diagram showing a mode that the striker rotationally displaced in the reverse direction from the reference | standard rotation position of a standing posture. It is a block diagram showing the state which the striker and the lock mechanism part engaged and locked. It is a block diagram showing a mode that a leg member turns up and down. It is a block diagram showing the other modified example. It is a block diagram showing the other modified example. It is a block diagram showing the other modified example. It is a block diagram showing a mode that the striker is rotationally displaced in both forward and reverse directions from the reference rotational position of the standing posture in the modified embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat back 3 Seat cushion 4 Reclining device 4r Rotating shaft part 5 Tumble mechanism 5r Rotating shaft part 10 Striker mechanism part 11 Striker 11a Engaging arm part 11b Supporting arm part 11c Contact part 12 Shaft member 13 Torsion spring 14 Operation Cable 15 Tension spring 16 Rubber member 17 Substrate part 17h Mounting hole 17t Receiving piece 18 Torsion spring (spring member)
DESCRIPTION OF SYMBOLS 19 Tension spring 20 Locking mechanism part 21 Substrate member 21a Receptacle 22 Hook member 22a Upper jaw part 22b Lower jaw part 22c Projection part 23 Rotating shaft part 24 Hanging claw member 25 Rotating shaft part 26 Operation cable 27 Tension spring 30 Folding leg mechanism 31 Leg member 32 Push pin 33 Rotating shaft part 34 Leg lock mechanism part 35 Bracket F Floor P Car body panel Ph Depression R Elastic rubber S Strike G Guide surface I Inner side O Outer side T Rubber member U Hook

Claims (4)

A locking structure for a retractable seat for a vehicle, which is provided between a seat for a vehicle and a member on a vehicle body side and can be engaged with and disengaged from the member on the vehicle body side at a position where the seat is retracted. And
An engagement member provided on the seat side member;
An engaged member provided on a member on the vehicle body side having a configuration capable of engaging and locking with the engaging member,
The engaging member and the engaged member relatively move with the retracting movement of the sheet, and the other member is relatively pushed into the receiving port formed in the one member. It is configured to operate so that the member on one side is engaged and locked with the member on the other side in conjunction with the movement,
The engaging member is pivotally supported by the seat side member so as to be able to be turned upside down, and can be engaged and locked with the engaged member by the upright turning. It is possible to switch between a reference rotation position and a rotation position of a retracted posture that is retracted in accordance with the shape of the sheet, and at the time of storing and moving the sheet, The holding member provided therebetween holds the engaging member in a state where it is raised from the turning position in the retracted position to the reference turning position in the standing position,
Further, relative to the engagement member held at the reference rotation position of the standing posture, the relative rotation displacement in both the forward and reverse directions with respect to the reference rotation position of the standing posture of the engagement member is elastically deformed. Rotational displacement absorbing means that can be absorbed and allowed by
The rotational displacement absorbing means is configured such that when the relative rotational position shifts between the engaging member and the engaged member, the engaging member is engaged along the shape of the receiving port. A relative displacement position between the engaged member and the engaged member is allowed, allowing a rotational displacement that is forced to be pushed in with a rotation toward a position where the engagement member is engaged and locked. A lock structure for a retractable seat for a vehicle, wherein the shift is corrected. It is a lock structure of the retractable seat for vehicles according to claim 1,
The engagement member is connected to an operation cable that is pulled when the seat is moved, and the engagement member is pulled from a rotation position in a retracted position to a reference rotation position in a standing position by pulling the operation cable. Can be pulled up and lifted up,
The rotational displacement absorbing means is
A rubber member provided between the engagement member and the member on the seat side, and a tension spring provided in a pulling path of the operation cable,
The rubber member is disposed as the holding means for holding the engaging member biased in the turning direction raised by the pulling of the operation cable at the reference turning position of the standing posture by contact,
The engaging member held at the reference rotation position of the standing posture is allowed to rotate in one direction by elastic deformation in the tension direction of the tension spring, and rotates in the opposite direction. A lock structure for a retractable seat for a vehicle, wherein dynamic displacement is allowed by elastic deformation accompanying the pressing of the rubber member. It is a lock structure of the retractable seat for vehicles according to claim 1,
The rotational displacement absorbing means is
It consists of a spring member and a rubber member provided between the engagement member and the member on the seat side,
The spring member is arranged in a direction to raise the engagement member and urge it in the turning direction.
The rubber member is disposed as the holding means for holding the engaging member biased in the raising rotation direction in a reference rotation position of a standing posture by contact,
The engaging member held at the reference rotation position of the standing posture is allowed to move in one direction by elastic deformation against the bias of the spring member, and in the opposite direction. The pivotable displacement of the vehicle is allowed to be allowed by elastic deformation accompanying the pressing of the rubber member. A lock structure for a retractable seat for a vehicle according to any one of claims 1 to 3,
The engaging member is a frame-shaped striker,
The lockable structure of a retractable seat for a vehicle, wherein the engaged member is a lock mechanism portion including an operation mechanism that can be engaged and locked with the frame-shaped striker.

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