JP5463707B2 - Sliding device for vehicle seat - Google Patents

Description

  The present invention relates to a vehicular seat slide device, and more particularly to a vehicular seat slide device capable of adjusting the slide position of a seat by sliding an upper rail with respect to a lower rail.

  Conventionally, when the seat slide lock is released in order to adjust the seat slide position (position in the longitudinal direction of the seat relative to the floor), for example, sudden acceleration or sudden stop of the vehicle causes rapid acceleration on the seat. Even in such a case, a vehicular seat slide device that restricts the seat from sliding due to the acceleration is already known. Patent Document 1 below discloses a vehicle seat slide device in which the slidable amount of a seat is regulated by an auxiliary lock even when the seat slide lock is released. As a result, even when a sudden acceleration is applied to the seat when the slide position of the seat is adjusted, the seat can be prevented from sliding greatly due to the acceleration.

JP-A-8-164780

  However, the above-described conventional technology has a structure in which the slidable amount of the seat is regulated by the auxiliary lock even when a rapid acceleration is not applied to the seat. Therefore, when it is desired to slide the seat greatly, it is necessary not only to release the slide lock but also to release the auxiliary lock. As described above, since it is necessary to release the lock twice (release the slide lock and release the auxiliary lock), the slide operation when the seat is largely slid is complicated.

  The present invention is intended to solve such a problem, and its purpose is to simplify the sliding operation when the sheet is greatly slid, and even when a sudden acceleration is applied to the sheet, the sheet is caused by the acceleration. It is an object of the present invention to provide a vehicle seat sliding device that can prevent sliding.

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 to the vehicle floor side, and an upper rail assembled to the vehicle seat side so as to be slidable with respect to the lower rail, and sliding the upper rail with respect to the lower rail to slide the seat A vehicle seat sliding device capable of adjusting a position, wherein an acceleration acting relative to the vehicle in a sliding direction of the vehicle seat is detected, and when the detected acceleration exceeds a predetermined magnitude, a lower rail A brake unit for generating a frictional resistance is provided between the side and the upper rail side, and the lower rail and the upper rail are configured as a manual type slide .
According to this configuration, even when the vehicle seat is slid to a position where the slide amount increases, the vehicle seat can be slid only by releasing the slide lock. Therefore, as described in the prior art, it is not necessary to unlock twice, and the sliding operation when the vehicle seat is largely slid can be easily performed. Further, according to this configuration, when the vehicle seat slide position is adjusted, even if a sudden acceleration acts on the vehicle seat and the vehicle seat starts to slide due to the acceleration, the slide is immediately stopped. Can be made. That is, even when a sudden acceleration is applied to the vehicle seat when the slide position of the vehicle seat is adjusted, the vehicle seat can be prevented from sliding due to the acceleration.

The invention according to claim 2 is the vehicle seat slide device according to claim 1, wherein the brake unit is provided on the upper rail side of the lower rail side and the upper rail side. The configuration is as follows.
According to this configuration, a frictional resistance can be generated between the lower rail side and the upper rail side by the acceleration experienced by the occupant. Therefore, a frictional resistance can be generated between the lower rail side and the upper rail side without causing a sense of incongruity to the occupant seated in the vehicle seat.

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 showing the assembled state of FIG. FIG. 3 is an exploded perspective view of the brake unit of FIG. FIG. 4 is a schematic diagram of a longitudinal sectional view of the brake unit of FIG. FIG. 5 is a schematic diagram of a cross-sectional view of the brake unit of FIG. FIG. 6 is a schematic cross-sectional view of the brake unit in FIG. 4 showing a state when, for example, sudden acceleration is applied to the vehicle seat due to sudden start of the vehicle. FIG. 7 is a schematic cross-sectional view of the brake unit in FIG. FIG. 8 is a schematic diagram of a longitudinal cross-sectional view of the brake unit in FIG. 4 showing a state when a rapid acceleration is applied to the vehicle seat due to, for example, a sudden stop of the vehicle. FIG. 9 is a schematic cross-sectional view of the brake unit in FIG.

  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. 1-2, the sliding apparatus 4 of the vehicle seat (for example, passenger seat) 1 which concerns on the Example of this invention is demonstrated. The sliding device 4 is assembled to a pair of left and right lower rails 10 and 10 assembled along the front-rear direction of the vehicle floor F, and the seat cushion 2 of the vehicle seat 1 so as to be slidable with respect to both the lower rails 10. It is composed of a pair of left and right upper rails 20 and 20.

  The slide device 4 includes a slide lock that can slide the upper rails 20 with respect to the lower rails 10 and adjust the slide position of the vehicle seat 1. Here, the slide lock will be described in detail. The slide lock is a known lock mechanism, and is assembled to the side surface of the upper rail 20 so as to be rotatable around an axis whose longitudinal direction is the axial direction. Arm 22 and a plurality of through-holes 12a formed in the inner side wall 12 on the inner side of the lower rail 10 along the longitudinal direction thereof.

  At the tip of the arm 22, for example, three claws 22 a that can be simultaneously inserted into three continuous through holes 12 a among the plurality of through holes 12 a are formed. The arm 22 is connected via a lever (not shown) that can be operated by the occupant and an operation cable (not shown). When the occupant is not operating the lever, the pawl 22a penetrates the lower rail 10 at all times. It is assembled to the side surface of the upper rail 20 in a state of being biased in the insertion direction of the hole 12a.

  When these three claws 22a are inserted into the three continuous through holes 12a, the slide of the upper rail 20 is locked with respect to the lower rail 10, that is, the slide lock state. Thereby, the upper rail 20 can be fixed to the lower rail 10. When it is desired to adjust the slide position of the vehicle seat 1 from this slide lock state, first, the lever 22 is operated to rotate the arm 22 in the direction opposite to its urging direction.

  Then, since the insertion state of the claw 22a of the arm 22 and the through hole 12a of the lower rail 10 is eliminated, the vehicle seat 1 can be freely slid. Then, when the vehicle seat 1 is slid to a desired position, the lever operation is released, and the claw 22a of the arm 22 is inserted into the through hole 12a of the lower rail 10 again. As a result, the slide lock state is restored with the slide position adjusted.

  In this manner, the vehicle seat 1 can be adjusted to a slide position desired by the occupant (that is, a position where the slide amount increases or decreases). The slide locks described above are provided on the left and right sides so as to lock the slides of the upper rails 20. For this reason, when the occupant performs a lever operation, the left and right arms 22 rotate simultaneously. The slide lock is configured in this way.

  Further, the slide device 4 includes a brake unit 30 on the outer wall surface 24 on the outer side of the outer rail 20 on the outer side. The brake unit 30 includes a base member 32, a case member 34, a weight 36, a cover member 38, and a brake pad 40.

  Below, with reference to FIGS. 3-5, each structural member 32, 34, 36, 38, 40 of this brake unit 30 is demonstrated separately. First, the base member 32 will be described. The base member 32 is a substantially rectangular panel member that forms the base of the brake unit 30. The back surface of the base member 32 is joined to, for example, the outer side outer wall surface 24 of the outer side upper rail 20.

  Next, the case member 34 will be described. The case member 34 is a substantially B-shaped frame member that houses a weight 36 to be described later. A substantially U-shaped recess 34a is formed on the bottom surface of the case member 34 to prevent the stored weight 36 from rolling in the sliding direction (see FIG. 4). By thus forming the recess 34a to prevent the weight 36 from rolling, the spring constant required for the tension spring 42 described later can be reduced. That is, the tension spring 42 can be reduced in size. The edge of one side (the back side in FIG. 3) of the case member 34 is joined to the front surface of the base member 32.

  Next, the weight 36 will be described. The weight 36 is a spherical member that detects acceleration acting relatively to the vehicle floor F in the sliding direction. The weight 36 can move in the sliding direction when the detected acceleration exceeds a predetermined magnitude. Next, the cover member 38 will be described. The cover member 38 is a substantially U-shaped cover that restricts the weight 36 housed in the case member 34 so as to move only in the sliding direction.

  On the left and right sides of the front surface of the cover member 38 are formed openings 38b through which both brake pads 40 arranged respectively in front and rear in the sliding direction described later are advanced. Further, both free ends 38a of the cover member 38 are respectively joined to the front surface of the base member 32 so as to cover the case member 34 in which the weight 36 is accommodated as described above.

  Next, the brake pad 40 will be described. The brake pad 40 is a pad member that generates a frictional resistance between itself and the outer side outer wall surface 14 of the outer side lower rail 10. The brake pad 40 is covered with the brake surface 40a and the surface of the cover member 38 when no rapid acceleration is applied to the vehicle seat 1 (hereinafter simply referred to as “normal time of the vehicle seat 1”). The cover 38 is housed inside the cover member 38 so as to be substantially flush with the opening 38b of the member 38 (see FIG. 5).

  At this time, the brake pad 40 is housed inside the cover member 38 with the tension spring 42 hooked between the brake pad 40 and the base member 32. The brake pads 40 are respectively arranged in the front and rear of the sliding direction so as to be able to cope with any of the sliding directions of the weight 36. In addition, when the vehicle seat 1 is subjected to a rapid acceleration with respect to the “normal time of the vehicle seat 1” described above, it is referred to as “when the acceleration of the vehicle seat 1 occurs”.

  Further, a tapered surface 40b is formed on the rear side of the brake pad 40 so that the brake pad 40 itself is advanced from the opening 38b of the cover member 38 by contact with the movement of the weight 36 in the sliding direction. It should be noted that the inclination directions of the tapered surfaces 40b of the two brake pads 40 are opposite to each other (in FIG. 5, the taper of the left brake pad 40) so that the weight 36 can be moved regardless of the sliding direction. The inclination direction of the surface 40b is a right-down direction, whereas the inclination direction of the tapered surface 40b of the right brake pad 40 is a left-down direction. . The brake unit 30 is configured in this way.

  Next, with reference to FIGS. 6-9, the effect | action of the sliding apparatus 4 of the vehicle seat 1 which consists of the structure mentioned above is demonstrated. When the slide lock of the vehicle seat 1 is released to adjust the slide position of the vehicle seat 1, for example, if a sudden acceleration is applied to the vehicle seat 1 due to a sudden start of the vehicle, the vehicle seat 1 is Start to slide backwards. At this time, since a rapid acceleration acts on the weight 36 of the brake unit 30, the weight 36 also moves over the recessed portion 34 a of the case member 34 due to this acting acceleration (see FIG. 6).

  Then, with this movement, the tapered surface 40b of the rear brake pad 40 is pushed in, so that the rear brake pad 40 starts to advance from the opening 38b of the cover member 38 against the urging force of the tension spring 42. Therefore, the brake surface 40a of the advanced brake pad 40 starts to come into contact with the outer side outer wall surface 14 of the outer side lower rail 10 (see FIG. 7).

  Thereby, a frictional resistance is generated between the lower rail 10 and the upper rail 20 side, and the sliding of the vehicle seat 1 is decelerated or stopped by the generated frictional resistance. This description is described in the claims “If the acceleration acting relative to the vehicle in the sliding direction of the vehicle seat is detected and the detected acceleration exceeds a predetermined magnitude, the lower rail side and the upper rail This is equivalent to “creating a frictional resistance with the side”.

  In addition, when the rapid acceleration which acted on the vehicle seat 1 is eliminated, the weight 36 that has moved rearward is also returned to the recessed portion 34a by its own weight. Along with this, the pushing of the tapered surface 40b of the brake pad 40 is also eliminated, so that the advanced brake pad 40 is also returned to the opening 38b of the cover member 38 by the urging force of the tension spring 42 (the brake pad 40 also advances). Back to the previous state).

  In this description, since the weight 36 is moved rearward instantly, the rearward sliding distance of the vehicle seat 1 is small. The magnitude of the acceleration when the weight 36 moves rearward is determined by the shape of the recessed portion 34a of the case member 34 and the spring constant of the tension spring 42 in consideration of passenger safety. It is a matter. The same applies to the case where a rapid acceleration acts on the vehicle seat 1 due to a sudden stop of the vehicle, which will be described later.

  On the other hand, when the slide lock of the vehicle seat 1 is released to adjust the slide position of the vehicle seat 1, for example, when a sudden acceleration is applied to the vehicle seat 1 due to the sudden stop of the vehicle, The vehicle seat 1 begins to slide forward. At this time, since a rapid acceleration acts on the weight 36 of the brake unit 30, the weight 36 also moves over the recess 34 a of the case member 34 due to the acting acceleration (see FIG. 8).

  Then, with this movement, the tapered surface 40b of the front brake pad 40 is pushed in, so that the front brake pad 40 starts to advance from the opening 38b of the cover member 38 against the biasing force of the tension spring 42. Therefore, the brake surface 40a of the advanced brake pad 40 starts to come into contact with the outer-side outer wall surface 14 of the outer-side lower rail 10 (see FIG. 9).

  As a result, a frictional resistance is generated between the lower rail 10 and the upper rail 20 side as in the case where a sudden acceleration is applied to the vehicle seat 1 due to the sudden start of the vehicle described above, and the vehicle is caused by the generated frictional resistance. The sheet 1 slide decelerates or stops. This description also describes in the claims, “When the acceleration acting relative to the vehicle in the sliding direction of the vehicle seat is detected and the detected acceleration exceeds a predetermined magnitude, the lower rail side and the upper rail This is equivalent to “creating a frictional resistance with the side”.

  In addition, when the rapid acceleration which acted on the vehicle seat 1 is eliminated, the weight 36 that has moved forward is also returned to the recessed portion 34a by its own weight. Along with this, the pushing of the tapered surface 40b of the brake pad 40 is also eliminated, so that the advanced brake pad 40 is also returned to the opening 38b of the cover member 38 by the urging force of the tension spring 42 (the brake pad 40 also advances). Back to the previous state).

  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 slide device 4 includes the slide lock that can adjust the slide position of the vehicle seat 1 by sliding the upper rails 20 with respect to the lower rails 10. Therefore, even when the vehicle seat 1 is slid to a position where the slide amount increases, the vehicle seat 1 can be slid only by releasing the slide lock. Therefore, as described in the prior art, since it is not necessary to unlock twice, the sliding operation when the vehicle seat 1 is largely slid can be easily performed.

  Further, according to this configuration, when the acceleration acting relative to the vehicle floor F in the sliding direction exceeds a predetermined magnitude, the outer side outer wall surface 14 and the outer side upper rail 20 of the outer side lower rail 10 are provided. The brake pad 40 of the outer wall 24 on the outer side begins to come into contact. For this reason, even when the vehicle seat 1 is adjusted in the slide position, a sudden acceleration acts on the vehicle seat 1, and even if the vehicle seat 1 starts to slide due to the acceleration, the slide can be stopped immediately. it can. That is, even when a sudden acceleration is applied to the vehicle seat 1 while adjusting the slide position of the vehicle seat 1, the vehicle seat 1 can be prevented from sliding due to the acceleration.

  Moreover, according to this structure, the brake unit 30 is provided in the upper rail 20 side among the lower rail 10 side and the upper rail 20 side. Therefore, it is possible to generate a frictional resistance between the lower rail 10 side and the upper rail 20 side by the acceleration felt by the passenger sitting on the vehicle seat 1. Therefore, a frictional resistance can be generated between the lower rail 10 side and the upper rail 20 side without causing the passenger to feel uncomfortable.

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, the example in which the brake unit 30 is provided on the upper rail 20 side has been described. However, it is not limited to this, For example, you may provide in the lower rail 10 side. In that case, what is necessary is just to set it as the structure which advances the brake pad 40 toward the upper rail 20 side.

  In the embodiment, the configuration in which the weight 36 is prevented from rolling in the sliding direction by the recessed portion 34 a formed on the bottom surface of the case member 34 has been described. However, the present invention is not limited to this. For example, a configuration may be employed in which compression springs are disposed on the front and rear inner surfaces of the case member 34 to prevent the weight 36 from rolling in the sliding direction. In this case, when the slide lock of the vehicle seat 1 is released to adjust the slide position of the vehicle seat 1, for example, if a sudden acceleration is applied to the vehicle seat 1 due to a sudden start of the vehicle, the weight 36 Moves backward while bending the compression spring on the rear side. Thereby, the taper surface 40b of the back brake pad 40 can be pushed in similarly to the case where the recessed part 34a was formed. On the contrary, for example, when a sudden acceleration is applied to the vehicle seat 1 due to a sudden stop of the vehicle, the weight 36 moves forward while bending the front compression spring. Thereby, the taper surface 40b of the front brake pad 40 can be pushed in similarly to the case where the recessed part 34a was formed.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 4 Slide apparatus 10 Lower rail 20 Upper rail 30 Brake unit 36 Weight 40 Brake pad

Claims (2)

A vehicle seat having a lower rail assembled on the vehicle floor side and an upper rail assembled on the vehicle seat side so as to be slidable with respect to the lower rail, the seat rail being adjustable by sliding the upper rail with respect to the lower rail. A sliding device,
Brake unit that detects the acceleration acting relative to the vehicle in the sliding direction of the vehicle seat and generates a frictional resistance between the lower rail side and the upper rail side when the detected acceleration exceeds a predetermined magnitude equipped with a,
A vehicle seat slide device characterized in that the lower rail and the upper rail are slides of a manual type . The vehicle seat slide device according to claim 1,
A brake device for a vehicle seat, wherein the brake unit is provided on the upper rail side of the lower rail side and the upper rail side.

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