JP2013035517A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of achieving a reduction in the number of components for a stopper structure and simplification of configuration.SOLUTION: The vehicle seat, which makes a height of a seating part adjustable, includes: right and left side frames 30 which configure right and left frames of the seating part; front and rear links 6 and 7; a slide rail 5 which configures a four-link mechanism together with the side frames 30 and the front and rear links 6 and 7; and an operation unit 8 which has an operation member turned to drive the four-link mechanism and adjust the height of the seating part. The operation unit 8 has a pinion gear 82 which is rotated by an operation of the operation member. The rear link 7 is provided with a sector gear 71 which is meshed with the pinion gear 82 and which drives the four-link mechanism by the rotation of the pinion gear 82. Stopper parts 72 and 73 for regulating a driving range of the four-link mechanism are integrally provided at the outer peripheral edge of the rear link 7.

Description

  The present invention relates to a vehicle seat capable of adjusting the height of a seating portion.

  Conventionally, a vehicle seat such as a vehicle seat capable of adjusting the height of a seating portion is known. For example, in Patent Document 1, a four-bar linkage mechanism is configured by left and right seat frames, a seat riser provided below the seat frame, and a front link and a rear link interposed between the seat frame and the seat riser. In addition, a vehicle seat is disclosed in which a four-bar linkage mechanism is driven by operating a driving means provided on one of the seat frames, and the seat frame (sitting portion) is moved up and down.

JP 2008-265365 A

  By the way, in the vehicle seat of Patent Document 1, a guide hole provided in a sector gear integrated with a rear connecting shaft is engaged with a guide pin fixed to the inner surface of the seat frame, and the seat portion is raised and lowered. Thus, the drive of the four-bar linkage mechanism is restricted by the guide pin coming into contact with the upper end or the lower end of the guide hole.

  However, in the conventional stopper structure that regulates the drive of the four-bar linkage mechanism, the sector gear having the guide hole is integrated with the rear link constituting the four-bar linkage mechanism via the connecting shaft, and the guide is mounted on the seat frame. Since the pins are fixed, there is a problem that the number of parts increases. In addition, the large number of parts complicates and enlarges the stopper structure, which may increase the size of the vehicle seat.

  Therefore, an object of the present invention is to provide a vehicle seat that can reduce the number of parts of the stopper structure and simplify the configuration.

  The present invention for achieving the above-described object is a vehicle seat capable of adjusting the height of a seating portion, and the left and right side frames constituting the left and right frames of the seating portion, and the respective side frames. The front and rear links that are pivotably connected to each other, and the four-link mechanism that is provided below the side frame and supports the front and rear links so as to be pivotable together with the side frames and the front and rear links. A link support member, and an operation unit having an operation member for driving the four-bar link mechanism by rotating and adjusting the height of the seating portion. The link has a first gear that rotates by operation, and the link is provided with a second gear that meshes with the first gear and drives the four-bar linkage mechanism by rotation of the first gear. Is, the outer peripheral edge of the link that at least the second gear is provided, a stopper portion for restricting the drive range of the four-link mechanism, characterized in that it is formed integrally.

  According to such a configuration, since the second gear and the stopper portion are integrally provided in the link for raising and lowering the side frame, the number of parts can be reduced as compared with the conventional configuration. Thereby, the assembly workability | operativity of the vehicle seat can be improved. In addition, since the stopper portion is integrally provided on the outer peripheral edge of the link, the stopper structure can be simplified and downsized, so that the vehicle seat can be downsized.

  In the vehicle seat described above, the stopper portion includes a first stopper portion that restricts driving of the four-bar linkage mechanism when the left and right side frames are at the highest position, and the left and right side frames are at the lowest position. And a second stopper portion that restricts driving of the four-bar linkage mechanism.

  According to such a configuration, the drive of the four-link mechanism can be reliably restricted at both the highest position and the lowest position, and the seating portion can be stably supported at any position.

  In the vehicle seat described above, the first stopper portion has a first contact surface that restricts driving of the four-bar linkage mechanism by contacting the link support member, and the second stopper portion It can be set as the structure which has a 2nd contact surface which controls the drive of the said 4 joint link mechanism by contact | abutting to a link support member.

  According to such a configuration, it is not necessary to separately provide a dedicated member as a counterpart with which the stopper portion abuts, so that the number of parts can be reduced. In addition, this makes it possible to improve the assembly workability of the vehicle seat.

  In the vehicle seat described above, the rotation shaft on the link support member side of the link may be provided between the first stopper portion and the second stopper portion.

  According to such a configuration, the movable range of the four-bar linkage mechanism, that is, the adjustable height range of the seating portion is increased, and the seating portion is stably supported when contacting the link support member. Can do.

  In the vehicle seat in which the stopper portion has an abutting surface, the front end portion of the first abutting surface when the first stopper portion abuts on the link support member is from the rotation shaft of the operation member. And the rear end portion of the second contact surface when the second stopper portion is in contact with the link support member is located behind the rotation shaft of the operation member. It can be set as the structure provided.

  According to such a configuration, the rotation shaft of the operating member is located between the front end portion of the first contact surface and the rear end portion of the second contact surface in the front-rear direction. Thus, the difference in the length of the path of the force transmitted to the link support member through the first gear, the second gear and the link can be reduced. Thereby, a seating part can be supported more stably.

  In the vehicle seat in which the stopper portion described above has a contact surface, the link support member has a flat contacted surface that contacts the stopper portion, and the first stopper portion is connected to the link support member. A normal line of the abutted surface at the rear end of the first abutting surface when abutting is provided so as to pass through the operation unit, and the second stopper portion abuts on the link support member The normal line of the abutted surface at the front end portion of the second abutting surface may be provided so as to pass through the operation unit.

  According to such a configuration, when the abutment surface and the link support member abut, the operation unit is positioned above the abutment surface, so the first gear, the second gear, and the The path of the force transmitted to the link support member through the link can be shortened. Thereby, a seating part can be supported more stably.

  In each of the vehicle seats described above, the stopper portion may be provided on a side opposite to the side on which the second gear is provided with reference to at least one rotation shaft of the link. .

  According to such a configuration, since the stopper portion and the second gear are provided apart from each other, the influence of the load applied when the stopper portion restricts the drive of the four-bar linkage mechanism reaches the second gear. This can be reduced.

  According to the present invention, since the second gear and the stopper portion are integrally provided on the link for raising and lowering the side frame, the number of parts can be reduced and the assembly workability of the vehicle seat can be improved. . In addition, since the stopper portion is integrally provided on the outer peripheral edge of the link, the stopper structure can be simplified and downsized, so that the vehicle seat can be downsized.

  In addition, according to the present invention, by having a configuration having the first stopper portion and the second stopper portion, it is possible to reliably regulate the driving of the four-bar linkage mechanism at both the highest position and the lowest position, The seating portion can be stably supported at any position.

  Moreover, according to this invention, by setting it as the structure which each stopper part contact | abuts to a link support member, a number of parts can be reduced and the assembly workability | operativity of a vehicle seat can be improved.

  Further, according to the present invention, by providing the rotation shaft on the link support member side of the link between the first stopper portion and the second stopper portion, the height range of the adjustable seating portion can be increased. The seating portion can be stably supported when it comes into contact with the link support member.

  Further, according to the present invention, the rotation shaft of the operation member is provided so as to be positioned between the front end portion of the first contact surface and the rear end portion of the second contact surface, so that the link from the rotation shaft. The difference in the length of the path of the force transmitted to the support member can be reduced, and the seating portion can be supported more stably.

  In addition, according to the present invention, the operating unit is provided so as to be positioned above the contact surface that is in contact with the link support member, thereby shortening the path of the force transmitted from the rotation shaft to the link support member. And the seating portion can be supported more stably.

  Further, according to the present invention, by providing the stopper portion on the side opposite to the side on which the second gear is provided, the influence of the load applied when the stopper portion restricts the drive of the four-bar linkage mechanism is It is possible to reduce the gear.

1 is a perspective view of a vehicle seat according to an embodiment of the present invention. It is the side view which looked around the right side frame from the outside. It is an enlarged view around an operation unit. It is the side view which looked at the right side frame periphery from the inside. It is figure (a), (b) for demonstrating joining of a front link and a connection pipe. It is figure (a), (b) for demonstrating fixation of an operation unit. It is a figure for demonstrating the height adjustment of a seating part, The figure (a) which shows when a seating part exists in the lowest position, and the figure (b) which shows when a seating part exists in the highest position. It is an enlarged view around the operation unit of the vehicle seat which concerns on a modification.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the present invention, front and rear, left and right, and top and bottom are based on the passenger sitting on the seat.

  As shown in FIG. 1, a vehicle seat 1 as an example of a vehicle seat is configured such that the height of a seating portion on which an occupant sits can be adjusted, and a seatback frame 2 that constitutes a seatback frame; The seat part frame 3 constituting the seat part frame, the seat spring 4 as the occupant support member, the slide rail 5 as the link support member, the front link 6, the rear link 7, and the operation unit 8 are mainly used. In preparation.

  The vehicle seat 1 is configured by covering a seat cushion (not shown) made of urethane foam or the like on the outside of the seat back frame 2 and the seating portion frame 3.

  The seating part frame 3 mainly includes left and right side frames 30 that are substantially plate-like that constitute the left and right frames of the seating part, and a pan frame 39 that connects the front parts of the left and right side frames 30. Each side frame 30 and pan frame 39 are formed by pressing a metal plate, respectively.

  In the present embodiment, the pair of side frames 30 are formed symmetrically so that the operation unit 8 can be attached to either the left or right side frame 30. However, the present invention is not limited to this, and the right side frame 30 to which the operation unit 8 is fixed may be different from the left side frame 30 to which the operation unit 8 is not fixed. Specifically, for example, the left side frame 30 may have a configuration that does not include a protective wall 36 described later.

  As shown in FIG. 2, the side frame 30 mainly includes a main body portion 30A that extends substantially in the front-rear direction and a mounting portion 30B that protrudes obliquely upward from the rear portion of the main body portion 30A. . In the present embodiment, in the side frame 30, the main body 30A and the attachment 30B are integrally formed (as one component).

  The mounting portion 30B is provided with a known reclining mechanism 9 for adjusting the angle of the seat back frame 2, and the seat back is mounted on the mounting portion 30B (the rear portion of the seating portion frame 3) via the reclining mechanism 9. A frame 2 is attached.

  In the present embodiment, the side frame 30 has an uneven surface as a whole. More specifically, the side frame 30 has a fixed wall 31 to which the operation unit 8 is fixed, a flange portion 32 as a reinforcing portion provided around the fixed wall 31, and a link mounting recess 33. .

  The fixed wall 31 has a shape that extends in the front-rear direction from the front part to the rear end of the main body part 30A and protrudes upward so as to cover the lower part of the attachment part 30B at the rear part. ing. The fixed wall 31 mainly has an engaging portion 34, a positioning hole 35 (see FIG. 3), and a protective wall 36 (see FIG. 4).

  The flange portion 32 is provided so as to protrude outward in the left-right direction with respect to the fixed wall 31 around the fixed wall 31 and extend along the upper and lower edges of the side frame 30. Each of the upper and lower flange portions 32 has a substantially U shape in a sectional view (see FIG. 5A).

  In the present embodiment, the flange portion 32 provided at the upper and lower edges of the side frame 30, the front end portion of the side frame 30 (main body portion 30A), and the side frame 30 (including the upper portion of the attachment portion 30B). The rear end portion is a flush and continuous surface (except for a cut portion described later). For this reason, the reclining mechanism 9 is attached to a surface protruding outward in the left-right direction with respect to the fixed wall 31 to which the operation unit 8 is fixed.

  The flange portion 32 is partially cut at a portion where the main body portion 30A and the attachment portion 30B of the upper edge portion of the side frame 30 are connected to each other and a portion slightly forward from the front-rear center of the lower edge portion of the main body portion 30A. It has a cut portion 32A and a lower cut portion 32B. The upper cut portion 32A and the lower cut portion 32B are flush with the fixed wall 31.

  The link mounting recess 33 is a recess that is provided in a portion slightly in front of the center in the front-rear direction of the main body 30 </ b> A and is recessed inward in the left-right direction with respect to the fixed wall 31. The link mounting recess 33 has a substantially circular shape when viewed from the side, and is provided so that a part thereof covers the lower cut portion 32B. Thereby, for example, the side frame 30 (main body portion 30A) is moved in the height direction as compared with a configuration in which the link mounting recess 33 is provided between the upper and lower flange portions 32 where the lower cut portion 32B is not provided. It can be made compact.

  A front link 6 is connected to the inner side of the bottom wall of the link mounting recess 33 in the left-right direction.

  As described above, since the side frame 30 has an uneven surface as a whole, the rigidity of the side frame 30 can be improved. Further, in the present embodiment, since the flange portion 32 has a substantially U-shaped cross section, for example, in comparison with a configuration in which the peripheral portion of the side frame 30 is bent once in the left-right direction, The rigidity of the side frame 30 can be further improved.

  And the operation | movement of the front link 6 can be stabilized by connecting the front link 6 to the bottom wall of the link attachment recessed part 33 of the side frame 30 which improved rigidity in this way. The same can be said for the rear link 7 and the reclining mechanism 9, so that it is possible to improve the stability of the seat portion height adjustment operation and the seat back frame 2 angle adjustment operation, which will be described later.

  Next, the detail of the engaging part 34, the positioning hole 35, and the protective wall 36 which were provided in the fixed wall 31 is demonstrated.

  The engaging portion 34 is configured to attach the seat spring 4 to the side frame 30, and is provided below the front end portion of the upper cut portion 32A of the fixed wall 31 (main body portion 30A) and at the rear end portion of the lower cut portion 32B. One is provided above. As shown in FIG. 3, the engaging portion 34 is formed in a concave shape that is recessed inward in the left-right direction with respect to the fixed wall 31 (see also FIG. 6A), and two through holes 34 </ b> A are formed at the bottom thereof. Have. The seat spring 4 is engaged with the engaging portion 34 by inserting an end portion of the seat spring 4 into the through hole 34A.

  The positioning hole 35 is a through hole having a substantially circular shape in a side view for determining the position of the operation unit 8 with respect to the side frame 30, and is located at the rear of the fixed wall 31, more specifically, behind the rear engaging portion 34. Two are provided. Details of the positioning hole 35 will be described later.

  As shown in FIG. 4, the protective wall 36 is a substantially cup-shaped portion that extends inward in the left-right direction from the rear portion of the fixed wall 31 (rear of the rear engaging portion 34). It is provided integrally. The protective wall 36 includes a bottom wall portion 36A that is substantially parallel to the fixed wall 31, and a connecting wall portion 36B that connects the fixed wall 31 and the bottom wall portion 36A.

  36 A of bottom walls are formed so that the whole pinion gear 82 as an example of the 1st gear mentioned later and the part which the said pinion gear 82 and the sector gear 71 as an example of the 2nd gear mesh | engage from the left-right direction inner side may be covered. ing. Further, the connecting wall portion 36B is provided so as to cover from the rear obliquely upper side to the front oblique lower side of the pinion gear 82 along the periphery of the pinion gear 82, thereby covering the portion where the pinion gear 82 and the sector gear 71 are engaged from above. It is formed as follows.

  As described above, the protective wall 36 covers a portion where the pinion gear 82 and the sector gear 71 mesh with each other, so that foreign matter can be prevented from entering and pinching between the pinion gear 82 and the sector gear 71. In particular, in the present embodiment, since the meshing portions are covered from above, the foreign matter is less likely to fall into the teeth of the pinion gear 82 and the teeth of the sector gear 71, and the foreign matter can be more reliably suppressed from being caught. .

  In the present embodiment, since the protective wall 36 is provided integrally with the side frame 30, it is not necessary to attach another part having the same function as the protective wall 36 to the side frame 30. And assembly workability can be improved.

  As shown in FIG. 1, the seat spring 4 is a member that supports an occupant seated on the seat portion, and is disposed between the left and right side frames 30 (main body portion 30A). More specifically, in the present embodiment, the seat spring 4 has one end engaged with the engaging portion 34 of one side frame 30 and the other end engaged with the engaging portion 34 of the other side frame 30. By doing so, it is arranged so as to be bridged between the main body portions 30A of the left and right side frames 30.

  The slide rail 5 is a known configuration for moving the seating part frame 3 (sitting part) back and forth, and is provided below the side frame 30 (sitting part frame 3). The slide rail 5 is mainly composed of a lower rail 51 and an upper rail 52.

  The lower rail 51 has a shape extending long in the front-rear direction, and two lower rails 51 are provided at predetermined intervals on the left and right. Each lower rail 51 is fixed to the floor of the vehicle (vehicle).

  The upper rail 52 has a shape extending long in the front-rear direction, and is engaged with the lower rail 51 so as to be slidable in the front-rear direction. At the upper end of the upper rail 52, a planar contact surface 52A extending in a substantially front-rear direction on which stoppers 62, 72, 73 described later of the front link 6 and the rear link 7 abut, and the front link 6 and the rear link A link support portion 52B having a substantially triangular shape in side view, which rotatably supports 7 is provided.

  The upper rail 52 is connected to the seating portion frame 3 via the front link 6 and the rear link 7, so that the seating portion can be slid back and forth with respect to the floor of the vehicle to which the lower rail 51 is fixed. It can be done.

  As shown in FIG. 4, the front link 6 and the rear link 7 are rotatably connected to the side frame 30 and the upper rail 52 (slide rail 5), respectively, so that the side frame 30 and the slide rail 5 are connected. In addition, a four-bar linkage mechanism as a height adjustment mechanism is configured. The four-joint link mechanism allows the left and right side frames 30 (sitting portions) to be raised and lowered with respect to the slide rail 5 (vehicle floor).

  More specifically, one front link 6 is provided on each of the left and right sides (only one is shown), and a rear end of the drawing is formed by a pin 91 to form a node at the front of the side frame 30 (main body 30A). It is connected to the bottom wall of the link mounting recess 33. The pin 91 pivotally supports the front link 6 so that the front link 6 can rotate with respect to the side frame 30.

  The front end of the front link 6 is connected to the link support portion 52B on the front side of the upper rail 52 by a pin 92 so as to form a node. The pin 92 pivotally supports the front link 6 so that the front link 6 can rotate with respect to the slide rail 5.

  As shown in FIGS. 5A and 5B, a concave portion 61 and a stopper portion 62 are integrally provided on the outer peripheral edge of each front link 6.

  The recessed part 61 is a recessed part with which the end part of the connection pipe 65 as a connection member can be engaged, and has substantially circular arc shape seeing from the left-right direction. The left and right front links 6 are welded to the connecting pipe 65 in a state where the end of the substantially cylindrical connecting pipe 65 is engaged with the recess 61, so that the one side frame 30 is directed to the other side frame 30. The connecting pipes 65 are connected to each other. In the drawings of the present application, the welded portions are indicated by hatching with dots.

  According to the configuration for connection as described above, the connection pipe 65 can be disposed and attached to the recess 61 provided on the outer peripheral edge of the front link 6, so that the front link 6 and the connection pipe can be attached. Assembling workability with 65 can be improved. In particular, in this embodiment, the connection between the connection pipe 65 and the front link 6 is facilitated because the engagement between the connection pipe 65 having a substantially cylindrical shape and the recess 61 having a substantially arc shape when viewed from the side is facilitated. It can be improved further.

  Further, since the connecting pipe 65 can be arranged so as to be placed in the recess 61, the degree of freedom in the assembly order of the front link 6 and the connecting pipe 65 when assembling the vehicle seat 1 is improved, so that the assembly workability of the vehicle seat 1 is improved. It becomes possible to make it.

Hereinafter, the recess 61 will be further described.
When the front link 6 is in the posture shown in FIG. 5B, the recess 61 is provided on the upper side of the outer peripheral edge of the front link 6 so as to open upward. More specifically, the recess 61 is between the pin 91 that is the rotation axis on the side frame 30 side of the front link 6 and the pin 92 that is the rotation axis on the slide rail 5 side of the outer peripheral edge of the front link 6. Thus, the left and right front links 6 are formed so as to open toward the space above the plane PL2 connecting the rotation center on the side frame 30 side and the rotation center on the slide rail 5 side.

  Thereby, since the connection pipe 65 can be put in the recessed part 61, the assembly workability | operativity of the front link 6 and the connection pipe 65 can be improved more reliably. Moreover, since the recessed part 61 is formed between the pins 91 and 92, for example, in order to provide the recessed part 61, it is not necessary to provide the front link 6 with a portion that protrudes toward the rear of the pin 91. The front link 6 can be downsized and the configuration thereof can be simplified.

  More specifically, the recessed portion 61 is formed so that the opening edge portion 61 </ b> A extends toward the outside of the recessed portion 61 rather than the portion engaging with the connecting pipe 65. Thereby, since it becomes easy to engage the connection pipe 65 with the recessed part 61, the assembly workability | operativity of the front link 6 and the connection pipe 65 can further be improved.

  In the present embodiment, the connection pipe 65 is welded along the inner peripheral wall of the recess 61. Thereby, since the connection strength of the connection pipe 65 integrated by welding and the pair of left and right front links 6 can be improved, the direction of the load applied to the front link 6 changes as the four-bar linkage mechanism is driven. Even if it does, it can make it difficult to receive the influence of the change.

  In addition, when the substantially cylindrical connecting pipe 65 and the concave portion 61 having a substantially arc shape when viewed from the side are welded over the entire engagement range, the connecting pipe 65 and the pair of left and right front links 6 are more firmly connected. Is more desirable.

  The stopper portion 62 is a portion that regulates driving of the four-bar linkage mechanism together with a later-described second stopper portion 73 of the rear link 7 by contacting the contacted surface 52A of the upper rail 52. The stopper portion 62 is illustrated on the lower side of the outer peripheral edge of the front link 6 on the opposite side of the upper side in the drawing with respect to the surface PL2 described above. It is provided so as to protrude downward on the lower side of the pin 91 when in the posture shown in FIG.

  As described above, the stopper portion 62 and the recess 61 are provided apart from each other, so that the influence of the load applied when the stopper portion 62 comes into contact with the contacted surface 52A is engaged with the recess 61. 65 can be reduced. Thereby, a deformation | transformation etc. of the connection pipe 65 can be suppressed.

  As shown in FIG. 4, one rear link 7 is provided on each of the left and right sides (only one is shown), and a rear end of the drawing is formed by a pin 93 to form a node at the rear of the side frame 30 (main body 30A). In this way, the fixed wall 31 is connected to the inside in the left-right direction. The pin 93 pivotally supports the rear link 7 so that the rear link 7 can rotate with respect to the side frame 30.

  Further, the front end of the rear link 7 shown in the figure is connected to the link support portion 52B on the rear side of the upper rail 52 by a pin 94 so as to form a node. The pin 94 pivotally supports the rear link 7 so that the rear link 7 can rotate with respect to the slide rail 5.

  A sector gear 71 and stopper portions (first stopper portion 72 and second stopper portion 73) are integrally provided on the outer peripheral edge of the right rear link 7R. In the present embodiment, the sector gear 71 and the first stopper portion 72 are not provided on the outer peripheral edge of the left rear link 7L, and only the second stopper portion 73 is provided integrally (see FIG. 1). ).

  The sector gear 71 is a gear that meshes with a pinion gear 82 provided in the operation unit 8 and drives the four-bar linkage mechanism by the rotation of the pinion gear 82. The rear link 7R is in a state shown in FIG. It is formed on the upper surface of the rear end of 7R. Each gear tooth of the sector gear 71 is arranged on a substantially arc centering on a pin 93 that is a rotation shaft on the side frame 30 side of the rear link 7R.

  The first stopper portion 72 and the second stopper portion 73 are portions that regulate the drive range of the four-bar linkage mechanism by abutting against the abutted surface 52A of the upper rail 52. More specifically, when the left and right side frames 30 (sitting portions) are at the highest position, the first stopper portion 72 abuts against the abutted surface 52A and restricts the drive of the four-link mechanism (FIG. 7). (See (b)), and the second stopper 73 is a part that abuts against the abutted surface 52A and restricts the drive of the four-link mechanism when the seating part is at the lowest position.

  When the rear link 7R is in the posture shown in FIG. 4, the first stopper portion 72 is a portion that protrudes forward from the vicinity of the portion that supports the pin 94 of the rear link 7R, and the sector gear 71 is based on the pin 94 as a reference. Is provided on the front end side of the rear link 7 </ b> R opposite to the rear end side provided with. The end surface (front end surface) of the first stopper portion 72 is a first contact surface 72A that contacts the contacted surface 52A when the seating portion is at the highest position.

  As shown in FIG. 7B, the first contact surface 72A of the first stopper portion 72 has an operation knob 81 (operation member) described later of the operation unit 8 at the front end when the first contact surface 72A contacts the contacted surface 52A. ) Is provided so that the normal line L1 of the abutted surface 52A at the rear end when it abuts on the abutted surface 52A passes through the operation unit 8.

  Returning to FIG. 4, the second stopper portion 73 is a portion that protrudes downward from between the pins 93 and 94 of the rear link 7 when the rear link 7 is in the posture shown in FIG. 4. With reference to (surface PL3 connecting the rotation center of the pin 93 and the rotation center of the pin 94), it is provided on the lower surface side of the rear link 7 opposite to the upper surface side on which the sector gear 71 is provided. An end surface (lower end surface) of the second stopper portion 73 is a second contact surface 73A that contacts the contacted surface 52A when the seating portion is at the lowest position.

  In the present embodiment, the pin 94 that is the pivot shaft on the slide rail 5 side of the rear link 7R is provided between the first stopper portion 72 and the second stopper portion 73 in the front-rear direction.

  The second abutment surface 73A of the second stopper portion 73 has a rear end portion when it abuts against the abutted surface 52A and is located rearward of the rotation shaft 81A of the operation knob 81, so that the abutted surface 52A A normal line L2 of the abutted surface 52A at the front end when abutting is provided so as to pass through the operation unit 8.

  As shown in FIG. 1, the left and right rear links 7 are connected to each other by a substantially cylindrical connecting pipe 75. In the present embodiment, the rear link 7 and the connection pipe 75 are inserted by welding the end of the connection pipe 75 into a substantially circular through-hole provided in the rear link 7 as viewed from the side, and welding. It is joined. However, the present invention is not limited to this, and the rear links 7 may be connected to each other by adopting the same configuration as that of the front link 6 described above.

  The operation unit 8 is a member for driving the four-bar linkage mechanism by the operation of the occupant and adjusting the height of the seating portion. Of the left and right side frames 30, the operation unit 8 is located on the outer side in the left and right direction of the right side frame 30. Fixed to the back of the surface. The detailed arrangement of the operation unit 8 will be described later.

  As shown in FIG. 3, the operation unit 8 mainly includes a plate-shaped pedestal portion 80, an operation knob 81 as an operation member, a pinion gear 82 (see FIG. 4), and a fixing portion 83. Has been.

  The operation knob 81 is supported so as to be rotatable with respect to the pedestal portion 80, and is provided so as to protrude outward from the laterally outer surface of the fixed wall 31. Although illustration is omitted, the operation knob 81 rotates with friction with respect to the pedestal portion 80 by a known configuration.

  As shown in FIG. 4, the pinion gear 82 is supported coaxially with the operation knob 81 with respect to the pedestal portion 80 so as to rotate together by operation of the operation knob 81, and is provided on the inner side in the left-right direction of the fixed wall 31. The pinion gear 82 meshes with the sector gear 71 of the rear link 7R. With such a configuration, the pinion gear 82 is rotated by rotating the operation knob 81, and the height of the seating portion can be adjusted by driving the four-bar linkage mechanism.

  Returning to FIG. 3, the fixing portion 83 is a substantially triangular plate-like portion that protrudes radially outward from the pedestal portion 80, and two fixing portions 83 are provided in the present embodiment. More specifically, one of the two fixing portions 83 is provided so as to protrude toward the opposite side to the other across the rotation shaft 81A of the operation knob 81.

  Each fixing portion 83 is provided with one positioning hole 83A (through hole) having a substantially circular shape in side view for determining the position of the fixing portion 83 (operation unit 8) with respect to the side frame 30. The two positioning holes 83A in total are provided in the vicinity of the distal end portion 83B of each fixing portion 83 so as to overlap the two positioning holes 35 provided in the side frame 30.

  In this embodiment, the diameter of the positioning hole 83A of the fixing portion 83 is substantially the same as the diameter of a cylindrical portion (portion inserted into the positioning hole 83A) of a positioning pin P (see FIG. 6A) described later. It has become. Further, the diameter of the positioning hole 35 of the side frame 30 is formed larger than the diameter of the positioning hole 83 </ b> A of the fixing portion 83. The degree of the detailed size of the positioning hole 35 will be described later.

  The operation unit 8 is attached to a bottom wall of a recess provided in the side frame 30, specifically, a fixed wall 31 that is recessed inward in the left-right direction with respect to the flange portion 32 and the like. Thereby, since the protrusion amount of the operation unit 8 to the left-right direction outer side can be made small, a seating part can be reduced in size in the left-right direction, and compactization of the vehicle seat 1 can be achieved.

  Further, since the operation unit 8 is attached to the fixed wall 31 (the bottom wall of the recess), for example, the operation unit 8 is attached to a surface that is flush with the surface to which the reclining mechanism 9 of the attachment portion 30B is attached. As compared with the above, the length of the rotation shaft of the pinion gear 82 can be shortened. Thereby, the influence of the load concerning the rotating shaft of the pinion gear 82 can be reduced.

  The operation unit 8 is fixed to the fixed wall 31 (side frame 30) by welding. Thereby, since the operation unit 8 can be firmly fixed with respect to the side frame 30, for example, the impact resistance of the operation unit 8 in the case where the vehicle is collided can be improved.

  More specifically, the operation unit 8 is fixed to the side frame 30 by welding the fixing portion 83 to the side frame 30. Thereby, since the operation unit 8 and the side frame 30 can be welded at a position away from the operation knob 81 which is a movable part, the influence of spatter and heat generated during welding can be suppressed.

  In the present embodiment, since the two fixing portions 83 are provided, the fixing strength of the operation unit 8 with respect to the side frame 30 is further improved, and the operation unit 8 can be more stably fixed.

Hereinafter, the arrangement of the operation unit 8 will be described in detail.
In the present embodiment, in the operation unit 8, the rotation shaft 81 </ b> A of the operation knob 81 as a drive shaft is arranged behind the seat spring 4. Thereby, since the pinion gear 82 etc. which are the structures for driving the 4-joint link mechanism of the operation unit 8 from the part which the passenger | crew of a seating part seats can be kept away, a seating feeling can be kept favorable.

  In particular, in the present embodiment, since the entire operation unit 8 is disposed behind the rear engagement portion 34, the operation unit 8 and the engagement portion 34 do not overlap in the front-rear direction. Therefore, since the freedom degree of the arrangement position in the up-down direction of the engaging part 34 can be improved, the freedom degree of arrangement | positioning of the seat spring 4 engaged with the engaging part 34 improves, and seating feeling is improved. It is possible to make it.

  In the present embodiment, the seat spring 4 is employed as an occupant support member (a member that supports an occupant seated on the seat), and the range in which the operation unit 8 and the seat spring 4 overlap in the front-rear direction is reduced. Therefore, the degree of freedom of the arrangement position of the seat spring 4 itself is also improved. This also makes it possible to improve the seating feeling.

  Further, since the rotation shaft 81A of the operation knob 81 is disposed behind the seat spring 4, the main body portion is compared with the configuration in which the rotation shaft 81A and the seat spring 4 are disposed so as to overlap each other. Since 30A can be downsized (thinned) in the vertical direction, the side frame 30 can be downsized in the height direction.

  The operation unit 8 is fixed to the side frame 30 with one fixing portion 83 facing the engaging portion 34, that is, with the two fixing portions 83 facing substantially in the front-rear direction. Thereby, compared with the structure which fixes the fixing | fixed part 83 in the state which faced the up-down direction, the side frame 30 can be compactized to a height direction.

  Further, the operation unit 8 is arranged so as to be moved upward with respect to the main body portion 30A so that the upper portion thereof covers the lower portion of the attachment portion 30B. Thereby, since the main body 30A can be thinned, the side frame 30 can be made compact in the height direction.

  Further, the operation unit 8 is disposed on a line L3 connecting the rotation center of the reclining mechanism 9 and the rear end portion of the rear engagement portion 34 when viewed from the left-right direction. Thereby, since the reclining mechanism 9, the operation unit 8, and the rear engaging part 34 (seat spring 4) can be arranged on a straight line, the side frame 30 can be made compact in the height direction.

  As shown in FIG. 2, the operation unit 8 is configured such that the rotation shaft 81 </ b> A of the operation knob 81 is a pin 91 that is the rotation center of the front link 6 on the side frame 30 side and the side link 30 side of the rear link 7. Is disposed on the upper side of the surface PL1 connecting the pin 93 which is the center of rotation. As a result, the operation unit 8 is arranged above the drive range of the four-bar linkage mechanism, so that the side frame 30 is compact in the height direction without obstructing the operation of the front link 6 and the rear link 7. Can be

  Further, as shown in FIG. 3, the operation unit 8 is arranged so that the upper front portion thereof covers the upper cut portion 32A. Thereby, for example, the side frame 30 can be made compact in the height direction as compared with a configuration in which the operation unit 8 is attached between the upper and lower flange portions 32 where the upper cut portion 32A is not provided.

  In the present embodiment, the operation unit 8 is fixed in a posture that extends so that the front fixing portion 83 extends over the upper cut portion 32A, so that the front fixing portion 83 does not cover the upper cut portion 32A. Compared to the case where the operation unit 8 is fixed, the operation unit 8 can be arranged further upward. Thereby, the side frame 30 can be further downsized.

  Further, the operation unit 8 has a front end portion 83B, which is the most protruding portion of the rear fixing portion 83, as viewed from the left-right direction, and a line L4 connecting the rotation center of the reclining mechanism 9 and the rotation center of the operation knob 81. A line L5 is arranged below the line L4 so as to avoid the top, and the front end portion 83B of the front fixing portion 83 connects the rear end portion of the rear engaging portion 34 and the rotation center of the operation knob 81. Is disposed above the line L5. Thereby, since the reclining mechanism 9, the operation unit 8, and the rear engaging portion 34 can be disposed close to each other in the vertical direction, the side frame 30 can be made compact in the vertical direction.

  In the operation unit 8, the rotation shaft 81 </ b> A of the operation knob 81 is disposed above the seat spring 4. Thereby, compared with the configuration in which the operation unit 8 is disposed immediately behind the seat spring 4, the operation unit 8 can be disposed closer to the front, so that the side frame 30 can be made compact in the front-rear direction. .

  In the operation unit 8, the front fixing portion 83 is fixed at a position adjacent to the rear engaging portion 34, more specifically, the through hole 34A provided in the engaging portion 34 (side frame 30). Yes. The rigidity of the side frame 30 is reduced around the through hole 34A. By fixing the fixing portion 83 near the through hole 34A, the periphery of the through hole 34A is fixed to the fixed wall 31 and the plate shape. Since it has a double wall structure with the part 83, the rigidity of the seating part frame 3 as a whole can be improved.

  The operation unit 8 is attached so as to be adjacent to the reclining mechanism 9 and at a position obliquely below the front of the reclining mechanism 9 and behind the front end portion of the attachment portion 30B to which the reclining mechanism 9 is attached. ing. Since the operation unit 8 and the reclining mechanism 9 are both highly rigid members, the rigidity of the side frame 30 as a whole can be improved by arranging them in the vicinity. Thereby, the stability of the seat portion height adjustment operation when the operation unit 8 is operated and the angle adjustment operation of the seat back frame 2 when the reclining mechanism 9 is operated can be improved.

  In the present embodiment, the welded portion W1 of the front-side fixing portion 83 is located near the engaging portion 34, and the welded portion W2 of the rear-side fixing portion 83 is located near the reclining mechanism 9. The rigidity of the side frame 30 can be further improved.

  As shown by a chain line in FIG. 2, an operation lever 9 </ b> L for operating the reclining mechanism 9 is provided on the right side frame 30 to which the operation unit 8 is attached. The operation lever 9L is provided so as to extend substantially obliquely downward from the front portion of the reclining mechanism 9 when viewed from the left and right direction outside, and a part of the operation lever 9L overlaps with the rotation shaft 81A of the operation knob 81. In addition, the operation knob 81 is disposed on the outer side in the left-right direction. As a result, the space inside the left and right direction of the operation lever 9L can be used effectively, and the vehicle seat 1 can be made compact.

  Although not shown, in the present embodiment, the operation knob 81 is provided with a height mechanism operation lever for rotating the operation knob 81. The height mechanism operation lever is provided so as to extend substantially forward from the front portion of the operation knob 81 through the side frame 30 and the operation lever 9L.

  In this embodiment, since the operation unit 8 is arrange | positioned at the rear part of the side frame 30, the freedom degree of arrangement | positioning of the part which the passenger | crew of a height mechanism operation lever operates can be raised. This makes it possible to dispose the height mechanism operation lever at a position where it is easier for the occupant to operate, so that the operability of the operation knob 81 can be improved.

  Next, the manufacturing method of the vehicle seat 1 described above, more specifically, fixing of the operation unit 8 to the side frame 30 during the manufacturing process of the vehicle seat 1 will be described.

  When the operation unit 8 is fixed to the side frame 30, first, as shown in FIG. 6A, the positioning hole 83A of the fixing portion 83 and the positioning hole 35 of the side frame 30 to which the rear link 7R is connected are temporarily inserted. A fixing pin P is inserted, and the operation unit 8 is temporarily fixed to the side frame 30 (temporary fixing step). Thereby, as shown in FIG. 6B, the pinion gear 82 of the operation unit 8 and the sector gear 71 of the rear link 7R mesh with each other.

  In the present embodiment, as described above, the diameter of the positioning hole 83A is substantially the same as the diameter of the cylindrical portion of the pin P, and the diameter of the positioning hole 35 is larger than the diameter of the positioning hole 83A. As a result, the operation unit 8 is temporarily fixed with some play in the surface direction of the fixed wall 31 with respect to the side frame 30. As a result, the pinion gear 82 can be pressed against the sector gear 71 by pressing the operation unit 8 in the direction indicated by the arrow.

  In the manufacturing method of the present embodiment, the fixing portion 83 of the operation unit 8 and the fixed wall 31 of the side frame 30 are welded by the welding torch T while pressing the pinion gear 82 against the sector gear 71, and the operation unit 8 is connected to the side frame. 30 (fixing step).

  According to the fixing of the operation unit 8 as described above, since the gap between the teeth of the pinion gear 82 and the teeth of the sector gear 71 can be reduced, rattling between the pinion gear 82 and the sector gear 71 can be suppressed. Accordingly, for example, even when an impact is applied to the vehicle seat 1 due to a rear-end collision of the vehicle, the rotation of the rear link 7 can be suppressed, so that the seating by driving the four-link mechanism is performed. Sinking of the part can be suppressed.

  From the above, in the present invention, the size of the positioning hole 35 is large enough to adjust the gap between the teeth of the pinion gear 82 and the teeth of the sector gear 71, and the operation unit 8 is temporarily attached to the side frame 30 by the pin P. It is desirable to be small enough to stop. That is, if the size of the positioning hole 35 is substantially the same as that of the positioning hole 83A, it is difficult to adjust the gap between the teeth of the pinion gear 82 and the teeth of the sector gear 71, and the size of the positioning hole 35 is too large. This is because the operation unit 8 falls off the side frame 30 during temporary fixing.

Finally, the operation for adjusting the height of the vehicle seat 1 will be described.
As shown in FIG. 7A, when the occupant operates the operation knob 81 and rotates the pinion gear 82 in the clockwise direction in the drawing when the side frame 30 is at the lowest position, the rear link that meshes with the pinion gear 82. The 7R sector gear 71 rotates about the pin 93 in the counterclockwise direction in the figure. As a result, the left and right rear links 7 connected by the connection pipe 75 rise up toward the front.

  In conjunction with this, the front link 6 that constitutes the four-bar linkage mechanism together with the rear link 7, the slide rail 5, and the side frame 30 also rises forward, so as shown in FIG. Will move upward. Thereby, the position of the side frame 30 can be made high. Thereafter, the first abutment surface 72A of the first stopper portion 72 provided on the outer peripheral edge of the rear link 7R abuts against the abutted surface 52A of the slide rail 5, so that the drive of the four-bar link mechanism is restricted. The side frame 30 reaches the highest position.

  When the occupant operates the operation knob 81 and rotates the pinion gear 82 counterclockwise in the drawing when the side frame 30 shown in FIG. 7B is at the highest position, the rear link 7R meshing with the pinion gear 82 is shown. The sector gear 71 rotates around the pin 93 in the clockwise direction in the figure. As a result, the left and right rear links 7 are tilted backward.

  In conjunction with this, the front link 6 also falls backward, so that the side frame 30 moves downward as shown in FIG. Thereby, the position of the side frame 30 can be lowered. Thereafter, the stopper portion 62 provided on the outer peripheral edge of the front link 6 and the second contact surface 73A of the second stopper portion 73 provided on the outer peripheral edge of the rear link 7 come into contact with the contacted surface 52A. Thus, the drive of the four-link mechanism is restricted, and the side frame 30 reaches the lowest position.

According to the above, the following effects can be obtained in the present embodiment.
The sector gear 71 and the stopper portions 72 and 73 are integrally provided on the rear link 7R for raising and lowering the side frame 30, and the stopper portions 62 and 73 are integrally provided on the front link 6 and the rear link 7L. There is no need to provide it. Thereby, while being able to reduce a number of parts, the assembly workability | operativity of the vehicle seat 1 can be improved. Further, since the stopper portions 62, 72, 73 are integrally provided on the outer peripheral edges of the links 6, 7, the stopper structure can be simplified and reduced in size, so that the vehicle seat 1 can be reduced in size. It becomes possible.

  Since the rear link 7R includes the first stopper portion 72 and the second stopper portion 73, the drive of the four-bar linkage mechanism can be reliably restricted at both the highest position and the lowest position, and the seating portion at any position. Can be stably supported.

  Since the slide rail 5 that constitutes the four-bar linkage mechanism is used as the counterpart against which the stopper portions 72 and 73 abut, it is not necessary to provide another part to abut against the stopper portions 62, 72, and 73, thus reducing the number of parts. can do. Thereby, the assembly workability | operativity of the vehicle seat 1 can be improved.

  Since the pin 94 is provided between the first stopper portion 72 and the second stopper portion 73, the movable range of the four-bar linkage mechanism, that is, the height range of the adjustable seating portion can be increased while being covered. When contacting the contact surface 52A, the seat portion can be stably supported.

  As shown in FIG. 7, the front end portion of the first contact surface 72A is positioned in front of the rotation shaft 81A of the operation knob 81, and the rear end portion of the second contact surface 73A is more than the rotation shaft 81A. Since it is located rearward, the rotation shaft 81A is located between the front end portion of the first contact surface 72A and the rear end portion of the second contact surface 73A in the front-rear direction. Thereby, the difference in the length of the path of the force transmitted from the rotation shaft 81A through the pinion gear 82, the sector gear 71 and the rear link 7 to the contacted surface 52A can be reduced, and the seating portion can be made more stable. Can be supported.

  Both the normal line L1 of the contacted surface 52A at the rear end portion of the first contact surface 72A and the normal line L2 of the contacted surface 52A at the front end portion of the second contact surface 73A define the operation unit 8. In other words, the operation unit 8 is positioned above the contact surfaces 72A and 73A. Thereby, the path of the force transmitted from the rotation shaft 81A through the pinion gear 82, the sector gear 71 and the rear link 7 to the contacted surface 52A can be shortened, and the seating portion can be supported more stably. it can.

  The first stopper portion 72 is provided on the front end side opposite to the rear end side on which the sector gear 71 is provided with the pin 94 as a reference, and the second stopper portion 73 is provided on the pins 93 and 94 (surface PL3) as a reference. Therefore, the stopper portions 72 and 73 are provided apart from the sector gear 71. As a result, it is possible to reduce the influence of the load applied when the stopper portions 72 and 73 abut against the abutted surface 52A on the sector gear 71, so that the four-bar linkage mechanism is driven well. Is possible.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of this invention.

  In the said embodiment, although the flange part 32 (reinforcement part) made cross-sectional view substantially U shape, this invention is not limited to this. For example, the flange portion may be configured to have a substantially L shape in cross-sectional view with the bottom wall of the concave portion, which is bent once by bending the peripheral edge portion of the side frame outward or inward in the left-right direction.

  In the said embodiment, although a part of link attachment recessed part 33 was provided so that the lower side cut | interruption part 32B might be covered, this invention is not limited to this. For example, referring to FIG. 2, the link mounting recess 33 may be provided to face the lower cut portion 32 </ b> B, specifically, to contact the chain line shown in FIG. 2. According to this, the side frame 30 can be made more compact in the height direction as compared with the case where the link mounting recess 33 is provided close to the flange portion 32 in a configuration having no lower cut portion 32B.

  Moreover, in the said embodiment, although the link attachment recessed part 33 was provided so that the lower side cut | interruption part 32B might be covered, this invention is not limited to this. For example, referring to FIG. 2, in a configuration in which the lower cut portion 32 </ b> B is not provided in the flange portion 32, the link mounting recess 33 may be provided between the upper and lower flange portions 32. Even with such a configuration, the rigidity of the side frame 30 can be improved. Further, since the front link 6 is connected to a portion having high rigidity, the operation of the front link 6 can be stabilized.

  In the embodiment, the seat spring 4 is bridged between the main body portions 30A of the left and right side frames 30, but the present invention is not limited to this. For example, the seat spring may be stretched along the front-rear direction substantially parallel to the left and right side frames. In this case, the end portion of the seat spring may be attached to, for example, a frame or a pipe spanned between the left and right side frames 30.

  In the said embodiment, although the seat spring 4 was illustrated as a passenger | crew support member, this invention is not limited to this. For example, the occupant support member may be a pan frame disposed between the left and right side frames.

  In the said embodiment, although the slide rail 5 which enables a seating part to move back and forth was illustrated as a link support member (member which supports the links 6 and 7), this invention is not limited to this. For example, the link support member may be a link support bracket fixed to the vehicle floor, or may be a vehicle floor integrally provided with a link support configuration.

  In the above embodiment, the first stopper portion 72 is provided on the front end side opposite to the rear end side on which the sector gear 71 is provided on the basis of the pin 94, but the present invention is not limited to this. . For example, referring to FIG. 4, the first stopper 72 may be provided on the lower side opposite to the upper side on which the sector gear 71 is provided, with the pins 93 and 94 (surface PL3) as a reference. Good. According to this, since the 1st stopper part 72 and the sector gear 71 can be arrange | positioned farther, it can further reduce that the influence of the load concerning the 1st stopper part 72 reaches the sector gear 71.

  Moreover, in the said embodiment, although the 2nd stopper part 73 was provided in the opposite side to the side in which the sector gear 71 was provided on the basis of the pins 93 and 94 (surface PL3), this invention is limited to this. It is not a thing. For example, referring to FIG. 4, the second stopper portion 73 may be provided on the side opposite to the side on which the sector gear 71 is provided with reference to at least one pin (rotation center).

  In the above embodiment, the shapes of the left and right rear links 7 are different, but the present invention is not limited to this. For example, in the above embodiment, the left and right rear links 7 are formed symmetrically so that the four-bar linkage mechanism (height adjustment mechanism) can be driven even if the operation unit 8 is attached to either the left or right side frame 30. May be.

  In the above-described embodiment, the first stopper portion 72 that restricts the drive of the four-link mechanism when the side frame 30 is at the highest position is provided on the rear link 7R. However, the present invention is not limited to this. Absent. For example, you may provide a 1st stopper part and a 2nd stopper part in the front link 6 (at least one) of the said embodiment. In the present invention, it is sufficient that the stopper portion is provided only at the rear link 7R provided with at least the sector gear 71 (second gear).

  In the embodiment, the left and right front links 6 and the connection pipe 65 (connection member) are fixed by welding, but the present invention is not limited to this. For example, the left and right links and the connecting member may be fixed by adhesion, or may be fixed by fastening bolts or the like. The same applies to the left and right rear links 7 and the connecting pipe 75.

  In the said embodiment, although the substantially cylindrical connection pipe 65 was illustrated as a connection member (member which connects a right-and-left link), this invention is not limited to this, For example, a column shape, a prismatic connection member, etc. It may be. The same applies to the connecting pipe 75.

  In the embodiment, the recess 61 of the front link 6 has a substantially arc shape when viewed from the left-right direction, but the present invention is not limited to this. That is, the shape of the recess can be appropriately changed according to the shape of the connecting member.

  In the above-described embodiment, the operation unit 8 is such that the welded portion W1 of the front fixing portion 83 is positioned near the engaging portion 34 and the welded portion W2 of the rear fixing portion 83 is positioned near the reclining mechanism 9. However, the present invention is not limited to this. For example, as indicated by a chain line in FIG. 3, the operation unit 8 has a welded portion W1 ′ of the front-side fixing portion 83 located near the flange portion 32 and a welded portion W2 ′ of the rear-side fixing portion 83 connected to the pin 93. It may be located near. This also makes it possible to improve the rigidity of the side frame 30.

  In the embodiment, as shown in FIG. 3, the operation unit 8 has the distal end portion 83 </ b> B of the rear fixing portion 83 disposed below the line L <b> 4, and the distal end portion 83 </ b> B of the front fixing portion 83 is a line. Although arranged above L5, the present invention is not limited to this. For example, as shown in FIG. 8, the operation unit 8 is configured such that the distal end portion 83B of the rear fixing portion 83 is disposed above the line L4 while avoiding the line L4, and the distal end portion 83B of the front fixing portion 83 is. May be arranged below the line L5 while avoiding the line L5. Accordingly, the reclining mechanism 9, the operation unit 8, and the rear engagement portion 34 can be disposed close to each other in the front-rear direction, so that the side frame 30 can be made compact in the front-rear direction. In addition, illustration of the location welded is abbreviate | omitted in FIG.

  In the embodiment, the operation unit 8 has the rotation shaft 81A of the operation knob 81 disposed behind the seat spring 4, but the present invention is not limited to this. For example, in the above-described embodiment, the entire operation unit 8 may be disposed behind the seat spring 4 (occupant support member).

  According to this, the pinion gear 82 and the like can be further away from the portion of the seating portion where the occupant sits, so that the seating feeling can be kept even better. Further, since the operation unit 8 is arranged further rearward, a portion of the operation unit 8 that is attached to the mounting portion 30B can be increased, so that the main body 30A can be made thinner, and the side frame 30 can be moved in the height direction. It becomes possible to make it compact.

  In the said embodiment, although the operation unit 8 was arrange | positioned so that the part might cover the upper cut part 32A, this invention is not limited to this. For example, referring to FIG. 3, the operation unit 8 may be disposed so as to face the upper cut portion 32 </ b> A, specifically, in contact with the chain line shown in FIG. 3. According to this, the side frame 30 can be made compact in the height direction as compared with the case where the operation unit 8 is brought close to the upper flange portion 32 in the configuration having the flange portions 32 on the upper and lower sides.

  In the above embodiment, the operation unit 8 is provided with the two fixing portions 83, but the present invention is not limited to this. For example, only one fixing part may be provided, or three or more fixing parts may be provided. In the present invention, the shape of the fixing portion 83 is not particularly limited, and may be, for example, a substantially semi-oval shape as shown in FIG.

  In the embodiment, the pinion gear 82 (first gear) is provided so as to rotate coaxially with the operation knob 81 (operation member), but the present invention is not limited to this. For example, the gear (first gear) that meshes with the link-side gear may be provided so as to mesh with the gear that rotates coaxially with the rotation shaft of the operation member directly or via another gear.

  In the above embodiment, the positioning hole 35 of the side frame 30 is formed larger than the positioning hole 83A of the fixing portion 83. However, the present invention is not limited to this, and the positioning hole of the fixing portion is more than the positioning hole of the side frame. May be formed larger.

  In the said embodiment, although the operation unit 8 was attached to the rear part of the side frame 30, this invention is not limited to this, For example, you may attach to the front-back direction center vicinity or front part of a side frame. In this case, the link directly driven by the operation on the operation member may be the front link 6 instead of the rear link 7 (7R) of the above embodiment. That is, a configuration like the sector gear 71 of the above embodiment may be provided on the front link 6.

  In the embodiment, the operation unit 8 is attached to the right side frame 30, but the present invention is not limited to this, and may be attached to the left side frame 30.

  In the above embodiment, the operation knob 81 (lever type operation member) provided with the height mechanism operation lever is exemplified, but the present invention is not limited thereto, and may be a dial type operation member, for example.

  In the above-described embodiment, the vehicle seat 1 such as an automobile is shown as an application example of the vehicle seat. However, the present invention is not limited to this, and other vehicle seats, for example, a boat seat or an aircraft seat. It can also be applied.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 3 Seating part frame 5 Slide rail 6 Front link 7 Rear link 8 Operation unit 30 Side frame 52A Contact surface 71 Sector gear 72 1st stopper part 72A 1st contact surface 73 2nd stopper part 73A 2nd contact Contact surface 81 Operation knob 81A Rotating shaft 82 Pinion gear 94 Pin

Claims (7)

A vehicle seat with adjustable seating height,
Left and right side frames constituting left and right frames of the seat;
Front and rear links rotatably connected to the side frames;
A link support member that is provided below the side frame and supports the front and rear links so that the front and rear links are rotatable, and constitutes a four-bar link mechanism together with the side frames and the front and rear links,
An operation unit having an operation member for driving the four-bar link mechanism by rotating and adjusting the height of the seating portion;
The operation unit has a first gear that rotates by operation of the operation member,
The link is provided with a second gear that meshes with the first gear and drives the four-bar link mechanism by rotation of the first gear,
A vehicle seat characterized in that at least an outer peripheral edge of a link provided with the second gear is integrally provided with a stopper portion for restricting a driving range of the four-bar linkage mechanism.   The stopper portion includes a first stopper portion that restricts driving of the four-joint link mechanism when the left and right side frames are at the highest position, and the four-joint link mechanism when the left and right side frames are at the lowest position. The vehicle seat according to claim 1, further comprising a second stopper portion that restricts driving of the vehicle. The first stopper portion has a first contact surface that restricts driving of the four-bar linkage mechanism by contacting the link support member,
The vehicle seat according to claim 2, wherein the second stopper portion has a second contact surface that restricts driving of the four-bar linkage mechanism by contacting the link support member.   The vehicle seat according to claim 3, wherein a rotation shaft of the link on the link support member side is provided between the first stopper portion and the second stopper portion. The first stopper portion is provided such that a front end portion of the first abutting surface when abutting on the link support member is positioned forward of a rotation shaft of the operation member,
The second stopper portion is provided such that a rear end portion of the second abutting surface when abutting on the link support member is positioned rearward of a rotation shaft of the operation member. The vehicle seat according to claim 3 or 4. The link support member has a flat contacted surface that comes into contact with the stopper portion,
The first stopper portion is provided such that a normal line of the contacted surface at a rear end portion of the first contact surface when contacting the link support member passes through the operation unit.
The second stopper portion is provided such that a normal line of the contacted surface at a front end portion of the second contact surface when contacting the link support member passes through the operation unit. The vehicle seat according to any one of claims 3 to 5.   The said stopper part is provided in the opposite side to the side in which the said 2nd gear was provided on the basis of the at least one rotating shaft of the said link, The any one of Claim 1-6 The vehicle seat according to claim 1.

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