JP5549116B2 - Sliding device for vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat slide device, and more particularly to a vehicle seat slide device provided with a safety lock.

  Conventionally, a vehicular seat slide device that can slide a seat back and forth with respect to a floor is already known. Here, Patent Document 1 below discloses a vehicle seat slide device including a slide lock that can fix a vehicle seat at a slide position desired by an occupant. Thereby, the passenger | crew can adjust and use the slide position of the vehicle seat.

JP 2007-69694 A

  However, in the above-described prior art, when the occupant releases the slide lock in order to adjust the slide position of the vehicle seat, for example, sudden acceleration or sudden stop of the vehicle causes a rapid acceleration to act on the vehicle seat. Then, the vehicle seat may slide due to the acceleration. That is, in the vehicle seat, a sliding operation unintended by the occupant may be performed. In order to solve this problem, there is also a slide device equipped with a so-called safety lock, which is provided with an auxiliary lock separately from the slide lock to prevent the occupant's unintentional sliding motion when the occupant releases the slide lock. it was thought. However, since this slide device requires two locks (slide lock and auxiliary lock), its structure is complicated.

  The present invention is intended to solve such a problem, and an object of the present invention is to provide a vehicle seat slide device having a safety lock even with a simple structure.

The present invention is for achieving the above object, and is configured as follows.
The invention according to claim 1 includes a lower rail assembled on the vehicle floor side, an upper rail assembled on the vehicle seat side so as to be slidable with respect to the lower rail, and a slide lock that regulates sliding of the upper rail with respect to the lower rail, The slide lock is a vehicle seat slide device composed of a lock arm assembled on the upper rail side so as to be inserted into any of a plurality of locking holes formed along the longitudinal direction of the lower rail. , Equipped with a roller that rotates with respect to the bottom surface of the lower rail as the upper rail slides, and from the locked state of the slide lock in which the lock arm is inserted into the locking hole, the unlocked state in which the insertion is released When the upper rail slides, By the rotation of the roller, the slide lock is characterized to be returned to the locked state.
According to this configuration, when the occupant releases the left and right slide locks in order to adjust the slide position of the vehicle seat, for example, sudden acceleration or sudden stop of the vehicle causes a rapid acceleration to act on the vehicle seat. Even in this case, it is possible to prevent a sliding operation unintended by the occupant. A so-called safety lock can be activated. Since this safety lock is normally performed by a lock arm that fixes the slide of the vehicle seat, it can be implemented with a simple structure without requiring the two locks considered in the prior art.

FIG. 1 is an exploded perspective view of a sliding device for a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view after assembly of FIG. FIG. 3 is an exploded perspective view of the slide lock of FIG. 1 into a base assembly and a lock assembly. FIG. 4 is a perspective view of the state in which FIG. 3 is assembled. FIG. 5 is an exploded perspective view of the base assembly of FIG. FIG. 6 is an exploded perspective view of the lock assembly of FIG. FIG. 7 is a schematic longitudinal sectional view (A) of the slide lock and a schematic longitudinal sectional view (B) of the link mechanism in the locked state. FIG. 8 is a schematic vertical sectional view (A) of the slide lock and a schematic vertical sectional view (B) of the link mechanism in the unlocked state. FIG. 9 is a vertical cross-sectional schematic view (A) of the slide lock and a vertical cross-sectional schematic view (B) of the link mechanism in a state where a rapid acceleration is applied to the vehicle seat in FIG. 8. FIG. 10 is a vertical cross-sectional schematic diagram (A) of the slide lock and a vertical cross-sectional schematic diagram (B) of the link mechanism when returning to the locked state again in FIG. 9.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In the following description, “up”, “down”, “front”, “back”, “left”, and “right” refer to the directions of “up”, “down”, “front”, “back”, “left”, and “right” described in the above-described drawings. It shows the direction of up, down, front, back, left, right when used as a reference.

  First, with reference to FIGS. 1 and 2, a schematic configuration of a sliding device 4 for a vehicle seat 1 according to an embodiment of the present invention will be described. As an example of the sliding device 4 for the vehicle seat 1, the sliding device 4 for the passenger seat will be described as an example.

  The sliding device 4 includes a pair of left and right lower rails 10 and 10 assembled along the front-rear direction of the vehicle floor F, and left and right assembled to the seat cushion 2 of the vehicle seat 1 so as to be slidable with respect to both the lower rails 10. A pair of upper rails 20, 20 and left and right slide locks 30, 30 that are respectively assembled to the upper rails 20 and restrict the sliding of the upper rails 20 with respect to the lower rails 10 are provided. A plurality of locking holes 12a into which locking claws 92b of lock arms 92 (to be described later) of the left and right slide locks 30 and 30 can be inserted are formed in the bottom surfaces 12 of the lower rails 10 along the longitudinal direction thereof. Yes.

  Next, the detailed structure of the left and right slide locks 30 will be described with reference to FIGS. The left and right slide locks 30 and 30 are assembled to the left and right upper rails 20 and 20 so as to be symmetrical. Therefore, in the following description, only the left slide lock 30 among the left and right slide locks 30 and 30 will be described, and the description of the right slide lock 30 will be omitted.

  The left slide lock 30 is assembled to the left surface of the side wall 22 of the left upper rail 20 at substantially the center in the longitudinal direction. The left slide lock 30 includes a case-like base assembly 40 and a lock assembly 70 assembled therein (see FIGS. 3 and 4). Hereinafter, each of these assemblies 40 and 70 will be described individually.

  First, the base assembly 40 will be described with reference to FIG. The base assembly 40 mainly includes an outer case 42, a roller 48, and a transmission member 60.

  First, the outer case 42 will be described. The outer case 42 includes a left outer case 44 and a right outer case 46 formed in a substantially U shape so as to form a pair on the left and right. The outer case 42 is configured by joining the front and rear ends of the left outer case 44 and the front and rear ends of the right outer case 46, respectively. Further, guide grooves 44a and 46a are formed on the inner surfaces of the left and right outer cases 44 and 46, respectively, along the upper and lower sides thereof.

  In both the guide grooves 44a and 46a, guides 74a and 76a of left and right inner cases 74 and 76 described later can be guided. Thereby, even if the inner case 72 is assembled inside the outer case 42, the inner case 72 can be assembled without causing play. Further, retaining pieces 44c and 44c that protrude so as to face each other are formed on the lower edges of the front and rear of the left outer case 44, respectively. Thereby, even if the inner case 72 is assembled inside the outer case 42, it is possible to prevent the inner case 72 from falling out of the outer case 42.

  Next, the roller 48 will be described. The roller 48 is pivotally attached to a step surface 44b formed so as to rise on the surface of the left outer case 44 so that the outer peripheral surface 48a contacts the bottom surface 12 of the left lower rail 10. A first gear 50 is integrally assembled on the surface 48 b of the roller 48. At this time, the first gear 50 is assembled such that its axis coincides with the axis of the roller 48.

  Finally, the transmission member 60 will be described. The transmission member 60 includes a swinging body 62 pivotally attached to the step surface 44b of the left outer case 44, a first pulley 64 and a second pulley 66 pivotally attached to both ends of the swinging body 62, The belt 68 is fixed to the pulleys 64 and 66. A gear 68 a that can mesh with the gear 50 a of the first gear 50 described above is formed on the surface of the belt 68.

  The swinging body 62 is set so that the gear 68a of the belt 68 meshes with a gear 82a of a second gear 82 described later when the left slide lock 30 is in a locked state (FIG. 7B described later). )reference). In addition, when the left slide lock 30 is changed from the locked state to the unlocked state, the swing body 62 is further set so that the gear 68a of the belt 68 is also engaged with the gear 50a of the first gear 50 (described later). (See FIG. 8B). The base assembly 40 includes the outer case 42, the roller 48, and the transmission member 60 described above.

  Next, the lock assembly 70 will be described with reference to FIG. The lock assembly 70 mainly includes an inner case 72, a plate 78, a hook 90, and a lock arm 92.

  First, the inner case 72 will be described. The inner case 72 includes a left inner case 74 and a right inner case 76 that are formed in a substantially U shape so as to form a pair on the left and right. The inner case 72 is configured by joining the front and rear ends of the left inner case 74 and the front and rear ends of the right inner case 76 respectively. The guides 74a and 76a already described are formed on the outer surfaces of the left and right inner cases 74 and 76 along the upper and lower sides, respectively.

  In addition, guide grooves 74b and 76b are formed on the inner surfaces of the left and right inner cases 74 and 76, respectively, along the front and rear thereof. Both guide grooves 74b and 76b guide both edges in the longitudinal direction of a plate 78 to be described later. Thereby, the plate 78 can be slid back and forth with respect to the inner case 72, and the movement of the plate 78 in the vertical direction with respect to the inner case 72 can be restricted.

  A second gear 82 is pivotally attached to the left surface (front surface) of the left inner case 74 via a shaft 84. A second gear 82 is integrally fastened to one end side of the shaft 84, and a third gear 86 is integrally fastened to the other end side. The gear 86a of the third gear 86 is set so as to mesh with a rack 78d on the surface of a plate 78 described later. The third gear 86 includes a ratchet mechanism therein. Thereby, only the rotation of the second gear 82 in the forward direction (the arrow direction in FIG. 6) can be transmitted to the third gear 86.

  Next, the plate 78 will be described. The plate 78 is a member formed in a substantially rectangular thin plate shape. In the plate 78, a long hole 78a is formed at the center in the longitudinal direction, and a short hole 78b is formed in front of the long hole 78a. Both the holes 78a and 78b are formed so as to be arranged on the same straight line. Further, a base 90a and a front arm 90b of a hook 90, which will be described later, can be inserted into the holes 78a and 78b.

  The rack 78d already described is formed on the left side of the long hole 78a of the plate 78. Further, a projection 78c is formed in front of the short hole 78b of the plate 78. One end of the tension spring 80 is hooked on the projection 78c. The other end side of the tension spring 80 is latched in a hook hole 74 c formed in the left inner case 74.

  Next, the hook 90 will be described. The hook 90 is a plate member formed in a substantially inverted T shape including a base portion 90a and arm portions 90b and 90 integrally formed before and after the base portion 90a. A pin 94 a formed at the tip of the lever 94 is hooked on the hook 90. The lever 94 is connected to a knob (not shown) that can be operated by the occupant via an operation cable (not shown). When the occupant operates the knob, the hook 90 rises as the lever 94 rotates. This knob is common to the left and right slide locks 30. Therefore, the lifting operation of the hook 90 accompanying the operation of the occupant's knob is simultaneously performed in the left and right slide locks 30.

  Finally, the lock arm 92 will be described. The lock arm 92 is a member in which a recessed portion 92 a capable of accommodating both arm portions 90 b of the hook 90 is formed. At the lower end of the lock arm 92, for example, two locking claws 92b that can be simultaneously inserted into two continuous locking holes 12a among the plurality of locking holes 12a of the left lower rail 10 are formed. Yes. The front and rear ends of the lock arm 92 are joined to the front and rear inner surfaces of the left inner case 74 in a state in which both arm portions 90b of the hook 90 are accommodated in the recessed portion 92a.

  When the locking claw 92 b of the lock arm 92 is inserted into the locking hole 12 a of the left lower rail 10, the left upper rail 20 is locked with respect to the left lower rail 10. The same applies to the right slide lock 30 that is not described. For this reason, this locking is simultaneously performed in the left and right slide locks 30 and 30. Hereinafter, this locked state is referred to as “slid lock 30 locked state”. In this state, the occupant can fix and use the vehicle seat 1.

  On the other hand, when the insertion of the locking claw 92b is released, the left upper rail 20 is unlocked with respect to the left lower rail 10. The same applies to the right slide lock 30 that is not described. Therefore, this unlocking is also performed simultaneously at the left and right slide locks 30 and 30 due to the above-described operation of the occupant's knob. Hereinafter, the unlocked state is referred to as “the unlocked state of the slide lock 30”. In this state, the occupant can slide the vehicle seat 1. The lock assembly 70 includes the inner case 72, the plate 78, the hook 90, and the lock arm 92 described above.

  Next, with reference to FIGS. 7 to 10, the operation of the slide device 4 having the above-described configuration will be described. When the slide position of the vehicle seat 1 is adjusted forward from the locked state of the slide lock 30 shown in FIG. 7, the occupant first operates the knob to rotate the lever 94 (see FIG. 8A). The hook 90 is raised by rotating from the state indicated by the line to the state indicated by the solid line. Then, since the upper surface 90b1 of the both arms 90b of the hook 90 comes into contact with the back surface of the plate 78 (the lower surface in FIG. 8A), the plate 78 also rises with this contact.

  At this time, as described above, since the vertical movement of the plate 78 is restricted with respect to the inner case 72, the inner case 72 and the lock arm 92 are also raised as the plate 78 is raised. Thereby, the insertion of the locking claw 92b of the lock arm 92 to the locking hole 12a of the lower rail 10 is eliminated, and the slide lock 30 is switched from the locked state to the unlocked state.

  At this time, as the third gear 86 pivotally attached to the inner case 72 rises, the rocking body 62 of the transmission member 60 causes the gear 68 a of the belt 68 to be changed to the gear 50 a of the first gear 50. It turns in the direction of meshing. Thus, a link mechanism is formed with the first gear 50 as a base point and the transmission member 60, the second gear 82, the third gear 86, and the rack 78d as end points (see FIG. 8B).

Next, in this unlocked state, the occupant slides the vehicle seat 1 forward. Then, since the outer peripheral surface 48a of the roller 48 is in contact with the bottom surface 12 of the lower rail 10, the roller 48 is also rotated forward. With this rotation, the first gear 50 integrated with the roller 48 also rotates, and this rotation is transmitted to the rack 78d of the plate 78 through the link mechanism (the arrow in FIG. 9B is a link). Shows the direction of rotation of the mechanism). As a result, the plate 78 slides backward against the urging force of the tension spring 80. Then, since the hook 90 slides forward relative to the plate 78, the front arm portion 90b slides to a position where it can be fitted into the short hole 78b of the plate 78, and the rear arm portion 90b. Also slides to a position where it can be fitted into the long hole 78a of the plate 78 (see FIG. 9A). Therefore, even if the hook 90 is raised, the inner case 72 and the lock arm 92 are lowered by their own weight. Therefore, the locking claw 92b of the lock arm 92 is inserted into the locking hole 12a of the lower rail 10, and the slide lock 30 is returned from the unlocked state to the locked state. Thereby, for example, the vehicle seat 1 can be slid forward by one locking hole 12a. Thereafter, this is repeated, and the occupant can adjust the slide position of the vehicle seat 1 forward by sliding the vehicle seat 1 to a desired slide position .

  In the description of this operation, when the occupant is operating the knob, for example, when a sudden acceleration acts on the vehicle seat 1 due to a sudden stop of the vehicle, the vehicle seat 1 slides forward due to the acceleration. I will do it. That is, in the vehicle seat 1, a forward sliding operation not intended by the occupant is performed. At this time, since the outer peripheral surface 48a of the roller 48 is in contact with the bottom surface 12 of the lower rail 10, the roller 48 is also rotated forward.

  With this rotation, the first gear 50 integrated with the roller 48 also rotates, and this rotation is transmitted to the rack 78d of the plate 78 through the link mechanism (the arrow in FIG. 9B is a link). Shows the direction of rotation of the mechanism). As a result, the plate 78 slides backward against the urging force of the tension spring 80. Then, since the hook 90 slides forward relative to the plate 78, the front arm portion 90b slides to a position where it can be fitted into the short hole 78b of the plate 78, and the rear arm portion 90b. Also slides to a position where it can be fitted into the long hole 78a of the plate 78 (see FIG. 9A).

  Therefore, even if the hook 90 is raised, the inner case 72 and the lock arm 92 are lowered by their own weight. Therefore, the locking claw 92b of the lock arm 92 is inserted into the locking hole 12a of the lower rail 10, and the slide lock 30 is returned from the unlocked state to the locked state. In this way, when the occupant is operating the knob, even if a slide operation unintended by the occupant is performed, the slide of the vehicle seat 1 can be locked immediately. A so-called safety lock can be activated.

  When the slide of the vehicle seat 1 is locked by the operation of the safety lock, the occupant only has to release the operation of the knob. Then, the hook 90 is lowered by its own weight (see FIG. 10A). As a result, the state in which the both arm portions 90b of the hook 90 are fitted in the holes 78a and 78b of the plate 78 is released, so that the plate 78 is returned to the state before sliding by the urging force of the tension spring 80. In addition, it returns to the state before a link mechanism is also formed with rotation of the rocking | swiveling body 62 (refer FIG. 10 (B)).

  In the description of this action, when the occupant is operating the knob, contrary to the above, if a sudden acceleration is applied to the vehicle seat 1 due to the sudden start of the vehicle, the vehicle seat 1 is caused by the acceleration. Slides backwards. That is, in the vehicle seat 1, a backward sliding operation that is not intended by the occupant is performed. At this time, the roller 48 also rotates backward. Therefore, the first gear 50 also rotates with this rotation. However, as described above, this rotation is moved to the rack 78d of the plate 78 by the ratchet mechanism built in the third gear 86. It is never transmitted.

  Therefore, the left slide lock 30 remains unlocked. However, since the right slide lock 30 provided so as to be symmetrical with the left slide lock 30 is in a locked state, the slide of the vehicle seat 1 can be locked.

  The sliding device 4 for the vehicle seat 1 according to the embodiment of the present invention is configured as described above. According to this configuration, the vehicle seat 1 changes from the locked state of the slide lock 30 in which the locking claw 92 b of the lock arm 92 is inserted into the locking hole 12 a of the lower rail 10 to the unlocked state in which the insertion is released. When the slide slides, the link mechanism is operated by the rotation of the roller 48 accompanying the slide, and one of the left and right slide locks 30 and 30 is returned to the locked state. Therefore, when the occupant releases the left and right slide locks 30 and 30 to adjust the slide position of the vehicle seat 1, for example, sudden acceleration or sudden stop of the vehicle causes rapid acceleration on the vehicle seat 1. Even if it acts, it is possible to prevent a sliding motion unintended by the occupant. A so-called safety lock can be activated. Since this safety lock is normally performed by the lock arm 92 that fixes the slide of the vehicle seat 1, the safety lock can be implemented with a simple structure without requiring the two locks considered in the prior art.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, as an example of the sliding device 4 for the vehicle seat 1, the sliding device 4 for the passenger seat has been described as an example. However, the present invention is not limited to this. For example, a rear seat slide device may be used.

  In the embodiment, the configuration has been described in which the hook 90 that has been lifted starts to descend due to its own weight when the occupant slides the vehicle seat 1 to a desired position in front and releases the operation of the knob. However, the present invention is not limited to this, and a configuration that starts to descend by an urging member (for example, a spring) may be used. The same applies to the lock arm 92.

10 Lower rail 12a Locking hole 20 Upper rail 30 Slide lock 48 Roller 92 Lock arm F Vehicle floor

Claims (1)

A lower rail assembled on the vehicle floor side, an upper rail assembled on the vehicle seat side so as to be slidable with respect to the lower rail, and a slide lock that regulates sliding of the upper rail with respect to the lower rail,
The slide lock is a vehicle seat slide device composed of a lock arm assembled on the upper rail side so as to be inserted into any of a plurality of locking holes formed along the longitudinal direction of the lower rail. ,
A roller that rotates relative to the bottom of the lower rail as the upper rail slides is provided.
When the upper rail slides from the locked state of the slide lock in which the lock arm is inserted into the locking hole to the unlocked state in which the lock is released, the slide lock is locked by the rotation of the roller accompanying this slide. A vehicle seat slide device, wherein the vehicle seat slide device is returned to a state .

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