Seat for a vehicle

Abstract

Provided is a vehicle seat in which, even if a width direction sliding device is provided, an unlocking operation by a pedal is performed well. The vehicle seat is provided with a reclining mechanism that performs a reclining operation with a locking function with respect to a seat cushion, a width direction sliding device disposed below the reclining mechanism, a pedal portion that is stepped on during release of the locking function, and a transmission mechanism that transmits a stepping operation of the pedal portion to the reclining mechanism to release the locking function. The reclining mechanism is provided with an unlocking plate that releases the locking function by rotation through a predetermined angle. The transmission mechanism is provided with a first link having a sliding member that rotates by the stepping operation of the pedal portion, a second link having a cam surface on which the sliding member slides by the rotation of the first link to rotate the second link, and a third link having a lower end that is linked to the second link and an upper end that is engaged with the unlocking plate, the third link being lowered by the rotation of the second link to rotate the unlocking plate through the predetermined angle.

Description

Technical Field

[0001] This invention relates to seats for vehicles. Background Technology

[0002] Patent document 1 describes a structure in which the reclining device is unlocked in a vehicle seat by operating a special unlocking lever.

[0003] In vehicles where the seat is either the front row or the center seat in a three-row configuration, the unlock lever is often designed as a foot pedal for rear passengers.

[0004] Patent Document 2 describes a vehicle seat that includes: a front-to-back sliding device for sliding the seat in the front-to-back direction; and a left-to-right sliding device for sliding the seat in the width direction.

[0005] The left and right sliding device has: a fixed guide rail, which is arranged in a pair at the front and rear of the vehicle, connected to the upper part of the movable guide rail component of the front and rear sliding device and extending to the left and right; and a movable guide rail, which is supported on the fixed guide rail in a manner that allows it to slide left and right, and is connected to the seat side component.

[0006] The unlocking mechanism described in Patent Document 1 has an unlocking rod that extends from the tilting mechanism and acts directly on the tilting mechanism.

[0007] When this unlocking mechanism is applied to a vehicle seat with a left-right sliding device as described in Patent Document 2, the height of the reclining mechanism increases by the amount corresponding to the installation of the left-right sliding device, causing it to move away from the floor near the preferred position of the pedal. Therefore, conventionally, the following structure is often used: the pedal and the reclining mechanism are connected by a steel wire, and the pressing action of the pedal is converted into a pulling action of the steel wire and transmitted to the reclining mechanism, thereby unlocking the mechanism.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent Application Publication No. 2002-211292

[0011] Patent Document 2: Japanese Patent Application Publication No. 2002-248973 Summary of the Invention

[0012] The technical problem that the invention aims to solve

[0013] In recent years, research has been conducted to simplify the construction of the left and right sliding mechanism (hereinafter referred to as the width sliding mechanism) that slides the seat in the width direction in order to reduce the weight of the seat. At the same time, in order to reduce the torque exerted on the rear width sliding mechanism by the occupant's reclining movements, it is desirable to position the rear width sliding mechanism closer to the rear reclining mechanism (directly below or near it) than before.

[0014] If the rear width-direction sliding device is positioned below the tilting mechanism, it becomes prone to interfering with the mechanism of the unlocking pedal. For example, this could result in less allowable space for the connecting parts that rotate when the pedal is pressed, making it difficult to obtain sufficient tension in the steel wire and hindering the unlocking action.

[0015] Therefore, the technical problem to be solved by the present invention is to provide a vehicle seat that can be easily unlocked by stepping on a pedal even when it has a sliding device in the width direction.

[0016] Solution to the technical problem

[0017] To solve the above-mentioned technical problems, one solution of the present invention has the following structure.

[0018] 1) A seat for a means of transportation, comprising:

[0019] Chair cushion;

[0020] Chair back;

[0021] A reclining mechanism that enables the chair back to recline relative to the seat cushion in a locking manner;

[0022] A sliding device is disposed below the reclining mechanism to move the seat cushion in the width direction of the seat cushion;

[0023] A pedal portion, which is stepped on to release the locking function of the reclining mechanism; and

[0024] A transmission mechanism that transmits the pedaling action to the reclining mechanism to release the locking function;

[0025] The tilting mechanism has an unlocking plate, which can release the locking function by rotating it at a predetermined angle.

[0026] The transmission mechanism has:

[0027] The first link has a slider and rotates by the stepping action of the pedal part;

[0028] A second link, the second link having a cam surface, the slider sliding on the cam surface by means of the rotation of the first link, thereby causing the second link to rotate; and

[0029] The third link is connected at its lower end to the second link. The unlocking plate engages with the upper end of the third link. The second link rotates, and the third link moves downward, causing the unlocking plate to rotate by the specified angle.

[0030] 2) The vehicle seat according to 1), wherein the pedal portion is rotatably supported by a component substantially integrated with the movable guide rail of the sliding device.

[0031] 3) The vehicle seat according to 2), wherein the pivot point of the second link is located closer to the front end of the seat cushion and closer to the top than the pivot point of the first link.

[0032] 4) A vehicle seat according to any one of 1) to 3), wherein, when the state in which the pedal is not stepped on is taken as the first state, and the state in which the pedal is stepped on is taken as the second state,

[0033] During the transition from the first state to the second state, the slider moves upward, and the engagement position of the unlocking plate and the third link moves downward.

[0034] Invention Effects

[0035] According to the present invention, the following effect can be obtained: even with a width-direction sliding device, the unlocking action can be performed well by stepping on the pedal. Attached Figure Description

[0036] Figure 1 This is a perspective view of a vehicle seat 91, which is an embodiment of a vehicle seat according to an embodiment of the present invention.

[0037] Figure 2 This is a side view showing the width-direction sliding device 912 and the transmission mechanism K of the vehicle seat 91.

[0038] Figure 3 This is a construction diagram used to illustrate the transmission mechanism K.

[0039] Figure 4 This is a three-dimensional view of the transmission mechanism K, viewed from slightly below and to the left rear.

[0040] Figure 5 yes Figure 4 The Y-direction view. Detailed Implementation

[0041] The vehicle seat according to an embodiment of the present invention will be described using a vehicle seat 91 (hereinafter referred to as seat 91) as an example. For ease of explanation, the directions up, down, front, back, left, and right in the following description will be defined as passing through. Figure 1 The direction indicated by the center arrow. For example, the left and right direction is the width direction of seat 91 (cushion 1).

[0042] Seat 91 is configured as a front seat relative to the rear seats on the floor FL of a vehicle, for example.

[0043] For example, in the case of a vehicle that is a car with three rows of seats, seat 91 is set on the floor FL as a front seat or a middle seat.

[0044] like Figure 1 As shown, the seat 91 includes a seat cushion 1, a seat back 2, and a headrest 3 that is detachably mounted on the seat back 2. The seat cushion 1 has a pair of front-to-back movable guide rails 911 at its lower part, which are extended in the front-to-back direction and installed parallel to each other in the left-to-right direction.

[0045] On the other hand, a pair of front and rear fixed guide rails 81 are laid on the floor FL of a vehicle such as a car where the seat 91 is installed. The pair of front and rear fixed guide rails 81 are laid in a front-to-back direction and are parallel to each other in the left and right directions.

[0046] The front and rear movable guide rail 911 is supported on the front and rear fixed guide rail 81 in a manner that allows it to slide in the front and rear direction. As a result, the seat 91 can slide relative to the floor FL in the front and rear direction (see arrow DR1).

[0047] The seat cushion 1 has a pair of width-direction sliding devices 912 extending in the left-right direction and separated parallel in the front-back direction on the upper part of the front-back movable guide rail 911. The width-direction sliding devices 912 are connected to the upper part of the seat cushion 1. As a result, the upper part of the seat cushion 1 and the backrest 2 rotatably connected to it can slide in the left-right direction relative to the front-back movable guide rail 911 (see arrow DR2).

[0048] A reclining mechanism 7 is provided on the left side of the rear part of the seat cushion 1. The reclining mechanism 7 connects the backrest 2 to the seat cushion 1 in a manner that allows for relative reclining (see arrow DR3).

[0049] A transmission mechanism K is provided between the tilting mechanism 7 and the width-direction sliding device 912 at the rear.

[0050] Figure 2 This is a side view showing the width-direction sliding device 912 and the transmission mechanism K of the seat 91.

[0051] like Figure 2 As shown, the seat 91 has a pair of sliding devices 912 on the upper part of the front and rear movable guide rail portion 911, which are parallel to each other front and rear and extend in the left and right direction. The left and right direction is... Figure 2 The paper is perpendicular to the direction of the paper, with the left side being the front side of the paper.

[0052] The front width direction sliding device 912 includes: left and right fixed guide rails 912a, which are provided to extend upward from the front of the front and rear movable guide rails 911; and left and right movable guide rails 111, which are supported on the left and right fixed guide rails 912a in a manner that allows them to move in the left and right direction.

[0053] The rear width direction sliding device 912 includes: left and right fixed guide rails 912b, which are provided to extend upward from the rear of the front and rear movable guide rail portion 911; and left and right movable guide rails 112, which are supported on the left and right fixed guide rails 912b in a manner that allows them to move in the left and right direction.

[0054] The seat cushion 1 has a base panel 11 extending forward, backward, left, and right at its bottom. The base panel 11 is a component with high rigidity that forms the skeleton of the seat cushion 1.

[0055] The left and right movable guide rails 111 and 112 are integrally connected to the base panel 11 above them.

[0056] The rear edge of the base panel 11 is made into a back panel 113 that slopes upwards.

[0057] like Figure 1 and Figure 2 As shown, a reclining mechanism 7 is arranged above the left and right movable guide rails 112 at the rear, which connects the backrest 2 to the seat cushion 1 in a way that allows it to recline relatively.

[0058] The reclining mechanism 7 selectively allows the backrest 2 to rotate or not rotate relative to the seat cushion 1 about a reclining axis CL7 extending in the left and right direction. The reclining mechanism 7 has a locking function that maintains the reclining motion of the backrest 2 in a prohibited state (non-rotational state).

[0059] The tilting mechanism 7 has a generally circular unlocking plate 71 that is rotatable about the tilting axis CL7. The unlocking plate 71 is pressed against the tilting axis CL7 by a torque applying component (not shown). Figure 2 Apply force in a clockwise direction.

[0060] In its normal state without external force, the unlocking plate 71 is subjected to torque by the torque applying member and comes into contact with the rotation limiting member (not shown). The rotational position where the unlocking plate 71 comes into contact with the rotation limiting member is designated as the locked position. When the unlocking plate 71 is in the locked position, the tilting motion is locked and prohibited.

[0061] By overcoming the applied torque of the torque-applying component, the unlocking plate 71 is moved from the locked position to... Figure 2 Rotate counterclockwise by the specified angle, and the backward tilt lock is released.

[0062] Next, see Figures 2-4 The transmission mechanism K is described in detail. Figure 3 It is extraction Figure 2 The construction diagram of the transmission mechanism K in the diagram, magnified. Figure 4 This is a three-dimensional view of a portion of the transmission mechanism K, viewed from the lower left rear.

[0063] like Figure 3 As shown, the transmission mechanism K has a structure that includes a pedal part 51, a first link 52, a second link 53, a coil spring 54 and a third link 5 from the bottom side.

[0064] like Figure 4 As shown, the pedal portion 51 has an arm portion 510 extending rearward and a shaft portion 511 connected to the root of the arm portion 510 and extending in the left and right direction.

[0065] The shaft portion 511 is inserted into the bearing portions 121, 122 in a manner that allows it to rotate around the axis. The bearing portions 121, 122 are formed on the back plate 12 which is integrated with the back panel 113 of the base panel 11.

[0066] That is, the pedal part 51 is supported by a component integrated with the base panel 11 in such a way that it can rotate about the pedal axis CL5 which extends in the left and right direction.

[0067] The shaft 511 is supported by the torsion coil spring 513, which acts as a force-applying component. Figure 3 The force is applied in a counterclockwise direction. In its normal state when not stepped on by the rear seat occupant, the pedal 51 is held in a position where the arm 510 is approximately horizontal by abutting against the rotation limiting member (not shown).

[0068] Will be used as a side view Figure 3 The two-dimensional position of the pedal axis CL5 in the front-back and up-down directions is taken as the first rotation fulcrum P1.

[0069] Hereinafter, the normal state will be referred to as the first state, and the state in which the pedal part 51 is fully depressed will be referred to as the second state.

[0070] The first link 52, which is a plate-shaped component, has a defined angle θb with respect to the arm 510 (see [reference]). Figure 3 It is integrally connected to the shaft portion 511 of the pedal portion 51 in a manner that allows it to be connected in one piece. The angle θb is, for example, about 150°.

[0071] The first link 52 extends forward and upward in the first state of the pedal part 51. The first link 52 has a cylindrical first link pin 521 protruding to the left at its front end.

[0072] The second link 53 is fixed at the second rotation fulcrum P2 to a component (not shown) on the side of the base panel 11 in such a way that it can rotate about the first rotation axis CL53 that extends to the left and right.

[0073] like Figure 2 As shown, the two-dimensional position of the second rotation fulcrum P2 in the front-back and up-down directions is the position of the first rotation axis CL53, which is set on the upper side of the base panel 11 and to the lower left of the first connecting rod pin 521 in the first state of the pedal part 51.

[0074] The second link 53 is a slender plate-shaped component. The second pivot point P2 is located near one end of the second link 53.

[0075] The second link 53 has an opening 531 that opens along its length. One end side (lower end side) of the opening 531 is made into a standby opening 531a with an opening that is approximately circular. Furthermore, the lower edge of the opening portion of the opening 531 that is connected to the standby opening 531a and faces the front end is made into a cam surface 531b for the first link pin 521, which will be described later, to slide as a slider.

[0076] A link connection point P3 is provided at the other end (upper end) of the second link 53. The third link 55 is connected to the link connection point P3 in a manner that allows it to rotate about the second rotation axis CL54.

[0077] The second link 53 has an extension arm 532 that is closer to the front end than the link connection point P3 and extends out with a narrower width.

[0078] One end of the helical spring 54, which serves as the force-applying component, is fixed to the base panel 11 at the first spring fulcrum P54a. The other end of the helical spring 54 is connected to the second spring fulcrum P54b between the opening 531 of the second link 53 and the link connection point P3.

[0079] Therefore, the second link 53 is pushed by the coil spring 54. Figure 3 Apply force in a counterclockwise direction.

[0080] The third link 55 is a slender plate-shaped component that extends in the upward and downward direction. As described above, the lower end of the third link 55 is connected to the second link 53 at the link connection point P3.

[0081] The third link 55 is connected to the left of the second link 53.

[0082] An elongated opening 551, corresponding to the external shape, is formed from the middle part to the upper end of the third link 55 along its length.

[0083] The pin 711 on the unlocking plate 71 of the rear tilting mechanism 7 enters the upper part of the opening 551 and engages. That is, the unlocking plate 71 is engaged at the upper end of the third link 55.

[0084] exist Figure 2 In the first state shown, the position of the pin 711 that enters the opening 551 and engages corresponds to the locking position of the unlocking plate 71.

[0085] like Figure 4 As shown, above the link connection point P3 in the third link 55, a protrusion 552 protruding to the right is formed by a so-called half-brush process.

[0086] The second link 53, which has an extension arm 532, is subjected to a counterclockwise force by a coil spring 54 centered on the first rotation axis CL53. In the first state, where the pedal portion 51 is approximately horizontal, as... Figure 5 As shown, the extended arm 532 of the second link 53 abuts against the protrusion 552 of the third link 55. Therefore, rotation of the second link 53 and its connection to the third link 55 caused by the force applied by the coil spring 54 is prohibited. On the other hand, movement of the third link 55 in the forward and backward directions is restricted by the engagement of the upper side of the third link 55 with the opening 551 of the pin 711. Therefore, the posture of the second link 53 and the third link 55 is maintained in the first state. Figure 2 The posture shown.

[0087] The transmission mechanism K described above enters the second state from the first state, in which the rear seat occupant fully presses the pedal 51 without applying any force to the pedal 51.

[0088] Figure 3 The second state of the transmission mechanism K is shown in solid line, while the first state is shown in dashed line for a portion of the part.

[0089] like Figure 3 As shown, if the arm 510 of the pedal portion 51, which is in the first state indicated by a single dotted line, is stepped down and rotated (arrow DR31), the first link pin 521 of the first link 52 integrated with the arm 510 rotates clockwise about the pedal axis CL5 (arrow DR32).

[0090] If the first link pin 521 rotates clockwise, it will abut against the cam surface 531b of the opening 531 of the second link 53. The first link 52 rotates further by overcoming the elastic rebound force of the coil spring 54 through the stepping of the pedal part 51. Therefore, the first link pin 521 slides on the cam surface 531b and exerts a force on the second link 53 in the clockwise direction, causing the second link 53 to rotate clockwise about the first rotation axis CL53 (arrow DR33). The first link pin 521 functions as a slider with respect to the cam surface 531b.

[0091] As the second link 53 rotates along arrow DR33, the link connection point P3 also rotates clockwise around the first rotation axis CL53 (arrow DR34).

[0092] Therefore, the third link 55, which is rotatably connected to the link connection point P3, is pulled downward to the right and moved down (arrow DR35).

[0093] As a result, the pin 711 of the unlocking plate 71, which is engaged with the upper part of the opening 551 of the third link 55, is pulled downward (arrow DR36). Therefore, the unlocking plate 71 rotates by an angle θa (DR37) corresponding to the distance the pin 711 is pulled.

[0094] The angle θa is set to be sufficiently large than the predetermined counterclockwise rotation angle of the unlocking plate 71 required for tilt unlocking. Therefore, by stepping on the arm 510 of the pedal 51 to change the state of the transmission mechanism K from the first state to the second state, the tilt lock of the tilt mechanism 7 can be released.

[0095] If from Figure 3 When the second state, shown in solid line, removes the stepping force on the arm 510, the arm 510, including the first link 52, returns to the first state through the torsional elastic rebound force of the torsion coil spring 513.

[0096] The second link 53, including the link connection point P3, rotates counterclockwise due to the elastic rebound force of the coil spring 54. Figure 4 and Figure 5 As shown, rotation stops at the restricted position where the extended arm 532 abuts against the protrusion 552. That is, it returns to the first state.

[0097] like Figure 3As shown, due to the rotation when the state changes from state 1 to state 2, the first link pin 521, which acts as a slider, moves upward by a distance Ha in the vertical direction. On the other hand, if the state changes from state 1 to state 2, the engagement position of the pin 711 of the unlocking plate 71 with the third link 55 moves downward by a distance Hb in the vertical direction. In the transmission mechanism K, the distance Ha < the distance Hb.

[0098] like Figure 2 As shown, the smaller the distance Da in the front-to-back direction between the tilting mechanism 7 and the width-direction sliding device 912 at the rear, the more likely the following constraints will occur.

[0099] That is, such as Figure 3 As shown, the region AR1 located in front of and below the first rotation fulcrum P1 is due to... Figure 2 Since the width direction sliding device 912 is configured as shown, the rotation range of the first link 52 with the first link pin 521 cannot be set.

[0100] Furthermore, since the area AR2 extending from the right side of the first pivot point P1 to the upper right is the legroom for the rear seat occupants of the seat back 2, no parts other than the footrest 51 can protrude.

[0101] Therefore, the first link 52 is essentially configured to rotate in the area spanning from above the first pivot point P1 to the upper left. Thus, when the pedal portion 51 is pressed, the first link pin 521 rotates and rises, moving in the opposite direction to the downward movement of the pin 711 of the unlocking plate 71 when the tilt lock is released.

[0102] In contrast, the transmission mechanism K has a third link 55, which transmits the rotational action of the second link 53 with cam surface 531b to the rotational action of the unlocking plate 71 with pin 711, thereby linking them together.

[0103] Furthermore, the first link pin 521 of the first link 52 is used as a sliding member. By rotating the pedal part 51, the first link pin 521 slides on the cam surface 531b of the second link 53. Through this sliding, the second link 53 rotates, causing the link connection point P3 to move downward. The downward movement distance Hb of the third link 55, which engages with the pin 711, is set to be a larger distance than the upward movement distance Ha of the first link pin 521.

[0104] like Figure 3 As shown, the movement trajectory of the first link pin 521 between the first state and the second state crosses the line segment connecting the center position of the pin 711 connecting the first state D and the first rotation fulcrum P1, i.e., the connecting line LN1.

[0105] That is, the transmission mechanism K has the following function: to reverse the direction of the first linkage pin 521's movement (upward) along with the pedal part 51's stepping (downward), and increase the amount of movement (distance Ha) (increase the distance Hb).

[0106] Therefore, even though the seat 91 equipped with the transmission mechanism K has a width-direction sliding device 912, it can still perform a good backward reclining unlocking action by stepping on the pedal.

[0107] The pedal portion 51 is rotatably supported by a back plate 12 that is substantially integral with the base panel 11.

[0108] As a result, the foot pedal portion 51 has increased resistance to being stepped on. Furthermore, even when the vehicle equipped with the seat 91 experiences an impact force on the seat 91, such as a collision, the foot pedal portion 51 and the first link 52 are less likely to deform. Therefore, when an impact force is applied to the seat 91, the first link pin 521 of the first link 52 is prevented from deforming and causing the second link 53 to rotate, thus preventing the reclining lock from being unintentionally released.

[0109] like Figure 4 As shown, in the first state, a gap, exemplified by gap Dt, is provided between the inner edge of the standby opening 531a in the opening 531 of the second link and the first link pin 521 that enters the standby opening 531a. That is, if the first link 52 does not rotate to a certain extent, the first link pin 521 will not abut against the inner edge of the opening 531.

[0110] Therefore, when a vehicle equipped with seat 91 is involved in a collision or other event that applies an impact force to seat 91, causing various components to move due to deformation or inertial force, the first link pin 521 is prevented from causing the second link 53 to rotate, thus preventing the reclining lock from being unintentionally released.

[0111] This invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of this invention.

[0112] The transmission mechanism K does not necessarily have to make the distance Hb greater than the distance Ha. However, when the width direction sliding device 912 is arranged below the tilting member 7, thus narrowing the area that allows rotation by stepping on the pedal part 51, it is preferable that the distance Hb be made greater than the distance Ha, so that the space occupied around the pedal part 51 can be reduced.

[0113] During the transition between the first and second states, the transmission mechanism K does not necessarily require the movement trajectory of the first link pin 521 to cross the line segment connecting the center position of the pin 711 in the first state and the first rotation fulcrum P1, i.e., the connecting line LN1. However, when the width-direction sliding device 912 is positioned below the tilting mechanism 7, thus narrowing the area allowing rotation via the pedal portion 51, it is preferable that the movement trajectory of the first link pin 521 crosses the connecting line LN1 during the transition between the first and second states. This would reduce the space occupied in the front-rear direction around the pedal portion 51.

[0114] Means of transportation are not limited to automobiles. Means of transportation include vehicles and other means of transportation, such as railway vehicles, airplanes, ships, etc.

[0115] The directions mentioned above, such as up, down, left, right, front, and back, are for the convenience of explanation and do not limit the orientation of the vehicle seat 91 in the vehicle.

[0116] Label Explanation

[0117] 1 chair cushion

[0118] 11 Base Panel

[0119] 111, 112 Left and right movable guide rails

[0120] 113 back panel

[0121] 12 backplates

[0122] 121, 122 bearing sections

[0123] 2 chair back

[0124] 3 headrests

[0125] 51 Pedal Section

[0126] 510 arm

[0127] 511 shaft

[0128] 513 Force-applying component (torsion coil spring)

[0129] 52 First Link

[0130] 521 First Linkage Pin (Sliding Part)

[0131] 53 Second Link

[0132] 531 opening

[0133] 531a standby opening

[0134] 531b Cam Surface

[0135] 532 Extended Arm

[0136] 54 Helical Spring (Force-Applying Component)

[0137] 55 Third Link

[0138] 551 opening

[0139] 552 protrusion

[0140] 7. Rear tilting mechanism

[0141] 71 Unlocking Board

[0142] 711 sales

[0143] 81 front and rear fixed guide rails

[0144] 91. Vehicle seats (seats)

[0145] 911 Front and Rear Movable Guide Rails

[0146] 912 Width Direction Sliding Device

[0147] 912a, 912b left and right fixed guide rails

[0148] AR1, AR2 areas

[0149] CL5 pedal axle

[0150] CL7 rear tilt axis

[0151] CL53 first rotation axis

[0152] CL54 second rotation axis

[0153] Da,Ha,Hb distance

[0154] Dt gap

[0155] FL Flooring

[0156] K delivery mechanism

[0157] LN1 connection wire

[0158] P1 First rotational fulcrum

[0159] P2 Second Rotational Pivot

[0160] P3 Linkage Connection Point

[0161] P54a spring, first fulcrum

[0162] P54b spring, second fulcrum

[0163] Angles θa and θb

Claims

1. A seat for a vehicle, wherein, have: Chair cushion; Chair back; A reclining mechanism that enables the chair back to recline relative to the seat cushion in a locking manner; A sliding device is disposed below the reclining mechanism to move the seat cushion in the width direction of the seat cushion; The pedal is stepped on in order to release the locking function of the reclining mechanism; and A transmission mechanism that transmits the pedaling action to the reclining mechanism to release the locking function; The tilting mechanism has an unlocking plate, which can release the locking function by rotating it at a predetermined angle. The transmission mechanism has: The first link has a slider and rotates by the stepping action of the pedal part; The second link has a cam surface, and the slider slides on the cam surface by means of the rotation of the first link, thereby causing the second link to rotate; and The third link, the lower end of which is connected to the second link, and the unlocking plate engaging with the upper end of the third link, cause the second link to rotate, thereby causing the third link to move downwards and rotating the unlocking plate by the predetermined angle. When the pedal is not pressed (state 1) and the pedal is pressed (state 2) is considered as the first state,... During the transition from the first state to the second state, the slider moves upward, and the engagement position of the unlocking plate and the third link moves downward. The distance the slider moves upward is less than the distance the engaging position moves downward.

2. The vehicle seat according to claim 1, wherein, The pedal portion is rotatably supported by a component that is substantially integrated with the movable guide rail of the sliding device.

3. The vehicle seat according to claim 2, wherein, The pivot point of the second link is located closer to the front end of the seat cushion and closer to the top than the pivot point of the first link.

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