JP2019137230A - Move mechanism of moved member and sheet for vehicle having move mechanism - Google Patents

Abstract

To provide a move mechanism which can hoist sitting parts corresponding to lengthwise move of an upper rail, and a sheet for vehicle having the move mechanism.SOLUTION: A move mechanism comprises: a rear link member 50 having a lower rail 10, an upper rail 20, a height adjust rail 30 attached to the lower rail directly or indirectly, a moved member 40, a first shaft support part 51 supported rotatably with a shaft by the upper rail, a moved member attachment 52 attached to the moved member, and a slide part 53 shifting along the height adjust rail; and a front link member having a second shaft support part 71 supported rotatably with a shaft by the upper rail, and a third shaft support part 72 supported rotatably with a shaft by the moved member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a moving mechanism for a member to be moved and a vehicle seat having the moving mechanism.

  Various lift-up mechanisms for raising and lowering a vehicle seat have been proposed. For example, Patent Document 1 discloses a rotating member that is rotated by a power source, and a first link member that is rotatably connected to a position (an output portion) whose one end is eccentric from the rotation center of the rotating member. There has been proposed a lifter device for a vehicle seat, comprising: a power conversion mechanism that transmits a displacement on the other end side of the first link member as a displacement in a height direction to a seating portion on which an occupant is seated.

  Such a lifter device includes a power change mechanism that can move the seat portion up and down and transmits the displacement of the other end portion of the first link member as a vertical displacement to the seat portion on which the occupant sits. The rotation is transmitted to the seating portion, so that the seating portion is not displaced in the horizontal direction as well as the vertical direction. Such a lifter device moves up and down in the same straight line as possible.

  Although the conventional lifting device including the lifting mechanism described in Patent Document 1 has been proposed in various ways with respect to the operation of the lifting mechanism, the range of lifting is limited to the hip point according to the height of the driver. The position was adjusted so that it could not be lowered for rest or sleep, and did not have an ascending / descending distance enough to make it higher for viewing.

Japanese Patent Laid-Open No. 2017-24608

  SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and a moving member moving mechanism capable of freely adjusting the height position in response to the longitudinal movement of the upper rail and a vehicle seat having the moving mechanism are provided. The main purpose is to provide.

  The present invention adopts the following means in order to achieve at least one of the above-mentioned main objects.

The moving mechanism of the member to be moved according to the present invention is:
Lower rail,
An upper rail slidably provided on the lower rail;
A height adjustment rail attached directly or indirectly to the lower rail so that at least a portion thereof has an angle with respect to the longitudinal direction of the lower rail;
A moved member to which a seat portion of the seat is attached;
A first shaft support portion that is rotatably supported by the upper rail directly or indirectly, a moved member mounting portion that is directly or indirectly mounted on the moved member, and moves along the height adjustment rail. A rear link member having a slide portion;
A front link member having a second shaft support portion rotatably supported by the upper rail directly or indirectly and a third shaft support portion rotatably supported by the moved member;
It is provided with.

  According to the moving mechanism according to the present invention, the member to be moved can be raised and lowered simply by moving the upper rail back and forth. In addition, by adjusting the angle of the height adjustment rail, the degree of elevation of the moved member relative to the movement of the upper rail can be changed.

  In the moving mechanism according to the present invention, the height adjusting rail may be formed to be bent in the vertical direction.

  By adopting such a configuration, it is possible to change the ratio of the moving distance of the moved member to the moving distance of the upper rail.

  Furthermore, in the moving mechanism according to the present invention, the height adjusting rail is formed such that the front portion and the rear portion are inclined with respect to the length of the lower rail, and the center portion is formed horizontally. It may be.

  By adopting such a configuration, when the upper rail is moved, it can be set so that the moved member does not move up and down when the central portion is moved.

  Furthermore, in the moving mechanism according to the present invention, the height adjusting rail may be characterized in that a front portion, a central portion, and a rear portion are formed with different inclinations with respect to the length of the lower rail. .

  By adopting such a configuration, when the upper rail moves in the front part, the central part, and the rear part, the rate of raising and lowering of the moved member can be made different.

  Furthermore, in the moving mechanism according to the present invention, the front link member may include a biasing member that biases in a predetermined direction.

  By adopting such a configuration, it is possible to easily perform the operation of moving the upper rail that is difficult to apply force forward.

Furthermore, in the moving mechanism according to the present invention,
The height adjustment rail is composed of a long member having a cross section that can accommodate a roller,
The slide part has two rollers whose axles are shifted, one of the rollers abuts on the top surface of the height adjustment rail, and the other roller abuts on the bottom surface of the height adjustment rail. It may be.

  By adopting such a configuration, since the roller presses both the upper surface and the bottom surface, it is possible to reduce the backlash of the slide portion in the height adjustment rail.

  Furthermore, the present invention provides a vehicle seat having the moving mechanism described above.

Furthermore, in the vehicle seat according to the present invention, the moving mechanism is provided on the slide rails on the left and right sides,
The rollers of the moving mechanism on both sides may be arranged symmetrically with respect to each other.

  By adopting such a configuration, the rattling of the vehicle seat can be effectively reduced.

FIG. 1 is a perspective view schematically showing the configuration of a moving mechanism 100 for a member to be moved according to the present embodiment and a vehicle seat 200 having the moving mechanism. FIG. 2 is a side view showing an outline of the configuration of the moving mechanism 100 for the member to be moved and the vehicle seat 200 having this moving mechanism according to the present embodiment. FIG. 3 is a rear view of the moving member moving mechanism 100 according to the present embodiment. FIG. 4 is a schematic diagram showing the movement of the moving mechanism 100 for the member to be moved and the vehicle seat 200 having this moving mechanism according to the present embodiment.

  Next, an embodiment of a moving member moving mechanism and a vehicle seat having the moving mechanism according to the present invention will be described in detail with reference to the drawings, taking a vehicle seat of an automobile as an example. The embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and do not depart from the gist of the present invention. The range can be changed as appropriate. In addition, in this embodiment, although the example applied to the vehicle seat is demonstrated as a representative example, the use place is not limited to a vehicle seat, It can be used for the seat for various vehicles. For convenience of explanation, directions indicated by arrows in FIG. 1 are described as “up”, “down”, “front”, “back”, “right”, and “left”, respectively.

  An embodiment of a vehicle seat 200 using the moving mechanism 100 of the moved member 40 is shown in FIGS. FIG. 1 is a perspective view showing a vehicle seat 200 using the moving mechanism 100 (except for the internal structure). 2 is a side view of the vehicle seat 200 using the moving mechanism 100, and FIG. 3 is a view of the rear link member 50 viewed from the rear.

  As shown in FIG. 1, the vehicle seat 200 using the moving mechanism 100 of the moved member 40 according to the embodiment is slidable mainly on a pair of lower rails 10 and lower rails 10 arranged on both sides of the vehicle seat 200. A pair of upper rails 20, a pair of height adjustment rails 30 fixed to the lower rail 10, a moved member 40, an upper rail 20, a height adjustment rail 30, and a moved member 40. A pair of rear link members 50 engaged with each other and a pair of front link members 70 disposed on the front side of the rear link member 50 and engaged with the upper rail 20 and the moved member 40 are provided.

  The lower rail 10 is not particularly limited, and various known types used for vehicles can be adopted. In the present embodiment, as shown in FIG. 1, a bottom surface portion 11, a standing side surface portion 12 that is erected upward from both sides of the bottom surface portion 11, and a substantially inward direction from the standing side surface portion 12. A long member having a horizontal portion 13 formed horizontally and an inner vertical portion 14 formed downward from the horizontal portion 13 is used.

  The upper rail 20 is a member that slides along the lower rail 10. In the present embodiment, as shown in FIG. 3, an outer extending portion 21 is formed so as to straddle the inner vertical portion 14 of the lower rail 10. It can move freely in the longitudinal direction but cannot be removed upward. The upper rail 20 is provided with an upper rail bracket 25 that is erected upward, and the rear link member 50 and the front link member 70 are indirectly attached via the upper rail bracket 25. The upper rail 20 and the lower rail 10 are provided with a lock mechanism 85 (see FIG. 2) for fixing the relative position. The lock mechanism itself can be used by appropriately selecting an existing technology.

  As shown in FIG. 1, the height adjustment rail 30 is formed of a long member having a substantially square cross section with the center of the upper surface opened, and is attached directly or indirectly to the lower rail 10. The height adjustment rail 30 has a plurality of portions with different inclinations. In the present embodiment, the front side is formed with a relatively tight slope (portion A in FIG. 2) so that the front is upward, and the central portion (portion B in FIG. 2) is formed horizontally. The rear side is formed with a relatively gentle slope (portion C in FIG. 2) so that the rear side faces downward, and is formed to be bent as a whole. However, selection of these inclination angles is not particularly limited, and can be selected as appropriate. For example, the central portion may be slightly inclined, four or more different inclinations may be combined, and further, the central portion may be curved to draw an arc. Depending on the inclination of the height adjusting rail 30, the moving ratio of the moved member 40 in the height direction with respect to the longitudinal movement of the upper rail 20 can be adjusted. The mounting form of the height adjustment rail 30 is not limited. In this embodiment, as shown in FIG. 3, it is attached via a so-called Z-shaped bending bracket 35.

  The moved member 40 is a member that supports the seat portion 205 of the vehicle seat 200, and the seat surface moves corresponding to the movement of the moved member 40.

  As shown in FIG. 1 or 2, the rear link member 50 is rotatable with respect to the first shaft support portion 51 (shaft fulcrum) rotatably attached to the rear side of the upper rail bracket 25 and the moved member 40. It is composed of a substantially triangular plate member having a movable member mounting portion 52 (operating point) pivotally supported on the shaft and a slide portion 53 (power point) slidably disposed in the height adjustment rail 30. The first shaft support portion 51 is rotatably attached by a rivet or the like. The moved member mounting portion 52 may be provided so as to be directly rotatable with respect to the moved member 40, or as shown in FIG. 1, the moved member 40 arranged on both sides of the vehicle seat 200 can be rotated. An erected rear connection pipe 41b may be provided, and the rear connection pipe 41b may be provided so as to be axially rotatable. The slide portion 53 is provided with a roller 58 that can move in the height adjustment rail 30. In the present embodiment, as shown in FIG. 3, two rollers 58 a and 58 b are provided, one on each side of the rear link member 50. The rollers 58a and 58b are arranged so that the axles are misaligned, one roller 58 is arranged at a position where the upper surface side of the height adjustment rail 30 is pressed, and the other roller 58 presses the bottom surface of the height adjustment rail 30. Are arranged to be. By arranging in this manner, the upper and bottom surfaces of the height adjustment rail 30 are pressed by the respective rollers 58a and 58b, so that the back link member 50 in the height adjustment rail 30 can be prevented from rattling. More preferably, the angle of the rear link member 50 and the height adjustment rail 30 changes as the rear link member 50 moves in the height adjustment rail 30, so that the height adjustment is performed as shown in the upper left enlarged view of FIG. It is preferable to displace the axle in an oblique direction with respect to the vertical direction of the bottom surface of the rail 30. By disposing the rear link member 50 in this way, the rear link member 50 is pressed against the upper surface and the bottom surface of the height adjustment rail 30 regardless of the position of the height adjustment rail 30. Even if it exists, it can prevent rattling. More preferably, the pair of rollers 58 provided on the height adjustment rails 30 arranged on the left and right sides of the vehicle seat are arranged so as to be symmetrical. For example, both inner rollers 58 press the top surface of the height adjustment rail 30, and both outer rollers 58 press the bottom surface of the height adjustment rail 30. By arranging the roller 58 in this way, it is possible to prevent rattling of the entire moved member 40. In a state in which the upper rail 20 is arranged at the rearmost position, that is, in a state in which the moved member 40 is at the lowest position, the moved member mounting portion 52 is located rearward and upward with respect to the first shaft support portion 51. The slide portion 53 is disposed rearward and downward with respect to the first shaft support portion 51. Preferably, the rear link member 50 may be set so as to have this positional relationship regardless of the position. The rear link member 50 is not necessarily limited to a triangular plate material and is not particularly limited as long as it is formed so as to have a pivot point, an action point, and a force point. For example, you may produce by the combination of a rod-shaped member.

  The front link member 70 is a link member provided in front of the rear link member 50 and, as shown in FIG. 2, a second shaft support portion provided on one side so as to be directly or indirectly rotatable on the upper rail 20. 71 and a third shaft support portion 72 that is rotatably provided with respect to the moved member 40 on the other side. The front link member 70 has a length between the movable member mounting portion 52 and the slide portion 53 (power point) of the rear link member 50 and a length between the second shaft support portion 71 and the third shaft support portion 72. If the lengths are set to be the same, and the straight lines connecting them are substantially parallel, the movement distances of both link members are substantially the same, and the movable member 40 is moved up and down while maintaining the tilt angle. be able to. When the length between the second shaft support portion 71 and the third shaft support portion 72 is shorter than the length between the moved member mounting portion 52 and the slide portion 53 of the rear link member 50, the height of the moved member 40 increases as it rises. The front side can be lowered so that the length between the second shaft support portion 71 and the third shaft support portion 72 is between the moved member mounting portion 52 and the slide portion 53) of the rear link member 50. When longer than the length, the rear side of the moved member 40 can be raised so as to rise as it rises. The forward link member 70 is provided with an urging member 80, and is urged in the direction in which the third shaft support portion 72 of the forward link member 70 is raised (the left rotation direction in FIG. 2).

  As described above, the manufactured vehicle seat 200 operates as follows. As shown in FIG. 4A, when the upper rail 20 is located at the rearmost position, that is, when the moved member 40 is located at the rearmost position, the movable member mounting portion 52 and the front link of the rear link member 50 are used. The third shaft support portion 72 of the member 70 is at the lowest position, and the moved member 40 is also arranged at the lowest position. That is, the vehicle seat is disposed at the lowest position. This position is not a position used during normal driving, but assumes a position used when taking a break, relaxing or sleeping.

  From this state, the operation lever 90 (see FIG. 1) is operated to slide the upper rail 20 forward as shown in FIG. 4B. That is, the seat is moved forward. As a result, the slide portion 53 moves forward in the height adjustment rail 30. As a result of this movement, the slide portion 53 is pressed rearward and upward by a reaction force from the bottom surface of the height adjustment rail 30 in the inclined portion on the rear side of the height adjustment rail 30 (portion C in FIG. 2). . As a result, the rear link member 50 rotates (rotates counterclockwise in FIG. 4) in a direction in which the moving member mounting portion 52 is raised and moved forward. As a result, the rear side of the moved member 40 moves in an arc shape with the first shaft support portion 51 as the center. That is, it moves upward and forward. Further, as the moved member 40 moves forward due to this movement, the third shaft support portion 72 of the front link member 70 is pushed upward and forward, and rotates around the second shaft support portion 71. Therefore, both the front and rear of the moved member 40 are raised, and the entire vehicle seat 205 is raised. And in the horizontal part (part of the range B in FIG. 2) in the center of the height adjustment rail 30, the height of the rear link member 50 between the first shaft support part 51 and the slide part 53 does not change. The uniaxial support portion 51 and the slide portion 53 slide while maintaining a constant angle. Therefore, the height of the slide part 53 does not change, and the height of the rear side of the moved member 40 does not change. Further, no force is applied to the third shaft support portion 72 of the front link member 70, and the height on the front side does not change. That is, the height of the moved member 40 is moved back and forth with the constant height. This range is intended to be used as a seating position during driving, and can move greatly only in the front-rear direction without moving in the height direction.

  Further, when the upper rail 20 is moved forward, the slide portion 53 moves on the inclined portion on the front side (the portion in the range A in FIG. 2). Since the height between the first shaft support portion 51 and the slide portion 53 is shortened, the slide portion 53 is pressed rearward and upward by the reaction force from the bottom surface of the height adjustment rail 30. As a result, the rear link member 50 rotates (rotates counterclockwise in FIG. 4) in a direction in which the moving member mounting portion 52 moves upward and forward. As a result, the rear side of the moved member 40 moves in an arc shape with the first shaft support portion 51 as the center. That is, it moves upward and forward. Further, as the moved member 40 moves forward due to this movement, the third shaft support portion 72 of the front link member 70 is pushed upward and forward, and rotates around the second shaft support portion 71. Therefore, both the front and rear of the moved member 40 are raised, and the entire vehicle seat is raised. In this range, since the inclination is steep, the rising distance with respect to the moving distance of the upper rail 20 in the forward direction is larger than the inclined portion on the rear side (the portion in the range C). This position is a position where the line of sight is high. This position is intended to allow the user to view the outside scenery while the vehicle is stopped or to ensure a child's view with a low line of sight in the passenger seat.

  Thus, according to the moving mechanism concerning the present invention, the vehicular seat can be raised and lowered by sliding the vehicular seat back and forth. The fixing position between FIG. 4A and FIG. 4C is not limited to FIG. 4B, and can be fixed in a plurality of stages. If the relative position of the upper rail 20 and the lower rail 10 is fixed (for example, by a lock unit or the like), all the moved members 40 can be fixed, and it is not necessary to provide a separate fixing unit.

  In addition, by moving the upper rail 20 rearward, as shown in FIGS. 4C to 4A, the moved member 40 is moved by the operation opposite to the ascending operation described above.

  Moreover, according to the moving mechanism concerning this invention, a still lower position and a higher position than the height of the seat cushion used during normal driving | running can be ensured.

  In addition, this invention is not limited to the structure of embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.

  For example, in the above-described embodiment, the center portion of the height adjustment rail 30 (the portion of the range B in FIG. 2) is provided horizontally, but the range B may also be configured with an inclination. The vehicle seat is adjusted by the driver himself in accordance with the height of the driver. At this time, it has been found that the seating position that is comfortable and safe for the driver, that is, the hip point, is statistically and ergonomically within a certain range according to the height. The driver adjusts the front / rear position of the vehicle seat by using the height adjustment rail 30 that is set so that the height of the hip point is set according to the front / rear position of the vehicle seat in a state adapted to the locus. It can be adjusted to the optimal seating height.

  According to the moving mechanism 100 of the moving member 40 as described above, the rising and lowering of the moving member 40 can be controlled only by input means for sliding the upper rail 20 back and forth. Therefore, it is not necessary to adjust the height position again after adjusting the front-rear position of the seat. In the case of the electric type, the height is automatically adjusted by the forward and backward movement of the vehicle seat, so that an electric unit for height adjustment is not required, which contributes to cost reduction as compared with the conventional case.

  In the above-described embodiment, two moving mechanisms 100 are provided so as to correspond to the left and right slide rails, respectively, but the height adjustment rail 30, the front link member 70, and the rear link member 50 are provided on either side, and the other The side may provide only a link that follows the movement of one side without having its own point of action.

  In the above-described embodiment, the vehicle seat has been described. Of course, the present invention is not limited to the vehicle seat, and the moving mechanism according to the present invention can be applied to all vehicle seats such as trains, airplanes, and wheelchairs. Can be applied.

  As shown in the embodiment described above, it can be used as a lifting device for a vehicle seat.

DESCRIPTION OF SYMBOLS 10 ... Lower rail, 11 ... Bottom part, 12 ... Standing side part, 13 ... Horizontal part, 14 ... Inner vertical part, 20 ... Upper rail, 21 ... Outer extension part, 25 ... Upper rail bracket, 30 ... Height adjustment rail 35 ... Bracket, 40 ... Moved member, 41b ... Back connecting pipe, 50 ... Back link member, 51 ... First shaft support, 52 ... Moved member mounting part, 53 ... Slide part, 58 ... Roller, 58a ... Roller , 70: Forward link member, 71: Second shaft support portion, 72: Third shaft support portion, 80 ... Biasing member, 85 ... Lock mechanism, 90 ... Operation lever, 100 ... Movement mechanism, 200 ... Vehicle seat, 205 ... Seat

Claims (8)

Lower rail,
An upper rail slidably provided on the lower rail;
A height adjustment rail attached directly or indirectly to the lower rail so that at least a portion thereof has an angle with respect to the longitudinal direction of the lower rail;
A moved member to which a seat portion of the seat is attached;
A first shaft support portion that is rotatably supported by the upper rail directly or indirectly, a moved member mounting portion that is directly or indirectly mounted on the moved member, and moves along the height adjustment rail. A rear link member having a slide portion;
A front link member having a second shaft support portion rotatably supported by the upper rail directly or indirectly and a third shaft support portion rotatably supported by the moved member;
A moving mechanism characterized by comprising:   The movement mechanism according to claim 1, wherein the height adjustment rail is bent in the vertical direction.   The moving mechanism according to claim 1 or 2, wherein the height adjusting rail is formed such that a front portion and a rear portion are inclined with respect to a length of the lower rail, and a central portion is formed horizontally. .   The moving mechanism according to claim 1 or 2, wherein the height adjusting rail has a front portion, a center portion, and a rear portion formed at different inclinations with respect to the length of the lower rail.   The moving mechanism according to any one of claims 1 to 4, wherein the front link member includes a biasing member that biases in a predetermined direction. The height adjustment rail is composed of a long member having a cross section that can accommodate a roller,
The slide part has two rollers whose axles are shifted, one of the rollers abuts on the top surface of the height adjustment rail, and the other roller abuts on the bottom surface of the height adjustment rail. The moving mechanism according to any one of claims 1 to 5.   A vehicle seat comprising the moving mechanism according to any one of claims 1 to 6. The moving mechanism is provided on the left and right slide rails,
The vehicle seat according to claim 7, wherein the rollers of the moving mechanism on both sides are arranged symmetrically to each other.

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