JP5730146B2 - Ottoman device for vehicle seat - Google Patents

Description

  The present invention relates to a ottoman device for a vehicle seat for mounting a passenger's foot to be used by being attached to the vehicle seat.

As a prior art of an ottoman device for a vehicle seat, for example, there is one disclosed in Patent Document 1.
The ottoman device includes a fixed portion fixed to a lower surface of a seat cushion (front portion) of a vehicle seat, a link mechanism capable of extending and shortening one end supported by the fixed portion, and an ottoman supported by the other end of the link mechanism. And an urging means for urging the link mechanism in the extension direction, a lock mechanism for allowing or restricting the extension and shortening operations of the link mechanism, and a lock operation means for operating the lock mechanism.

When no external force is applied, the lock operating means is positioned at the lock allowable position, and the lock mechanism is held in the locked state. Therefore, if an external force is not exerted on the lock operating means when the link mechanism is in the shortened state, the ottoman approaches the fixed portion side by the action of the lock mechanism and is held at the retracted position located immediately below the seat cushion.
On the other hand, when the passenger moves the lock operating means to the unlock position, the lock mechanism shifts to the unlocked state, so that the link mechanism urged by the urging means is in the extended state, and the ottoman is separated forward from the fixing portion. When the ottoman moves to a use position that is easy for the passenger to use, if the passenger returns the lock operation means to the lock allowable position, the lock mechanism is locked again and the link mechanism cannot be deformed. Retained. Therefore, a passenger sitting on the seat can place his / her feet on the ottoman.

JP 2006-198105 A

Since the ottoman device does not have means for holding the lock operation means in the lock allowable position, when the ottoman is in the storage position, if the passenger's hand or foot unintentionally touches the lock operation means, The lock mechanism is unexpectedly unlocked, and the ottoman can move to the use position side.
In order to solve this problem, it is only necessary to provide holding means for holding the lock operating means in the lock allowable position.
However, if the holding means is provided as a configuration different from the lock mechanism, the number of parts is greatly increased, resulting in a complicated structure and a significant increase in manufacturing cost.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an ottoman device for a vehicle seat that can simultaneously hold a link mechanism in a shortened state and hold a lock operation lever at a lock allowable position by a simple and inexpensive mechanism. .

  An ottoman device for a vehicle seat according to the present invention includes a fixed portion that is fixed to a vehicle seat, a storage position that approaches the fixed portion, and an ottoman that is movable between a use position that is separated from the fixed portion, and the fixed portion. The ottoman is provided between the ottoman and the ottoman to move the ottoman to the storage position and the use position, an unlocked state in which the movement mechanism is allowed to move, and the movement of the movement mechanism is restricted. A locking mechanism that can be shifted to a locked state in which the locking mechanism is held in the use position; a lock allowable position that is supported by the ottoman and that allows the locking mechanism to be shifted to the locked state; and A lock operation lever that can be moved to the unlocking position to be shifted to the unlocked state, a storage engagement member provided in the moving mechanism, and a lock operation lever provided on the lock operation lever. And a storage lock member that holds the ottoman in the storage position and holds the lock operation lever in the lock allowable position by engaging with the storage engagement member. .

  One of the storage engagement member and the storage lock member is a lock pin, the other is detachable from the lock pin, and the storage position is engaged with the lock pin when the ottoman is in the storage position. It may be a holding groove.

  The lock mechanism at the time of use moves together with the lock pin as the engaging member at the time of storage and the ottoman and is detachable from the lock pin. When the ottoman is located at the use position, And an engaging lock groove.

  The lock operation lever is supported by the ottoman so as to be movable only in the sliding direction, and the direction in which the ottoman moves from the storage position to the use position is such that the lock operation lever of the lock operation lever when the ottoman is located at the storage position. It may be different from the sliding direction.

According to the present invention, when the ottoman is located at the storage position and the moving mechanism is in the shortened state, the storing engagement member provided on the moving mechanism and the storing lock member provided on the lock operation lever are engaged. The retracting engagement member and the retracting lock member can simultaneously hold the link mechanism in the shortened state and hold the lock operation lever at the lock allowable position.
In addition, since the engaging member at the time of storage and the locking member at the time of storage serve as both the lock mechanism for the moving mechanism and the lock mechanism for the lock operation lever, an increase in the number of parts is minimized. Therefore, the structure is not extremely complicated, and the manufacturing cost is not significantly increased.

  If comprised like invention of Claim 2, the structure of the engaging member at the time of storage and the locking member at the time of storage will become very simple, and it will become possible to make manufacturing cost smaller.

  According to the third aspect of the present invention, since the lock pin also serves as a component of the lock mechanism in use, the structure of the ottoman device can be simplified and the manufacturing cost can be further reduced.

  According to the fourth aspect of the invention, when the retracting engagement member and the retracting lock member are engaged (when the ottoman is in the retracted position and the moving mechanism is in the shortened state), the lock operation lever The sliding direction, which is the movable direction, and the movable direction of the moving mechanism are different from each other. For this reason, if one of the lock operating lever and the moving mechanism tries to move, both of them are mechanically twisted, so that the movement of the lock operating lever toward the unlocked position and the movement of the moving mechanism in the extending direction can be restricted, and the link mechanism can be shortened. The holding in the state and holding at the lock allowable position of the lock operation lever becomes more reliable.

1 is a side view of a seat cushion of a vehicle seat according to an embodiment of the present invention and an ottoman device in a retracted state attached to a front portion of the seat cushion. It is a side view of an ottoman device which omitted illustration of a cushion when an ottoman moved to the back most use position. It is a side view of an ottoman device when an ottoman moves to the foremost use position. It is a disassembled perspective view of an ottoman device with a cushion omitted. It is a side view of an ottoman device when sliding a lock operation lever to a lock release position. It is an enlarged side view of a movable lock member. (A) is a side view showing the lock operation lever, the movable lock member, and the tension spring when the lock operation lever is located at the lock permissible position, and (b) is the position of the lock operation lever at the lock release start position. It is the same side view when doing.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The direction in the following description is based on the arrow direction in the figure.
A vehicle seat 10 shown in FIG. 1 includes a seat cushion 11 attached to the vehicle floor, and a seat back (not shown) attached rotatably to the rear portion of the seat cushion 11. An ottoman device 13 is attached to the front end portion of the lower surface of the seat cushion 11 of the vehicle seat 10.

The ottoman device 13 has a structure described below.
The ottoman device 13 includes a pair of left and right fixing portions 14 that are symmetrical to each other. The left and right fixing portions 14 are fixed to the front end portion of the lower surface of the seat cushion 11. One end portions of the first link 17 and the second link 18 are rotatably connected to the left and right fixing portions 14 by rotating connection pins 19 and 20 extending in the left-right direction. As shown in the figure, the first link 17 and the second link 18 are substantially parallel, and the length of the second link 18 is approximately half that of the first link 17. The middle part of the third link 21 extending in a different direction from the first link 17 and the second link 18 and one end part of the middle part of the left and right first links 17 and the other end part of the second link 18, respectively. Rotation connection pins 22 and 23 extending in a direction parallel to the rotation connection pins 19 and 20 are rotatably connected. At the other end of the left and right first links 17, one end of a fourth link 24 that is substantially parallel to the third link 21 extends in a direction parallel to the rotary connection pins 19 and 20, respectively. Is connected to be rotatable. Further, both ends of a connection pipe 26 extending in the left-right direction are fixed to the left and right third links 21, and both ends of a connection pipe 27 extending in the left-right direction are fixed to the left and right fourth links 24, respectively. It is.
The first link 17, the second link 18, the rotary connection pins 19, 20, the third link 21, the rotary connection pins 22, 23, the fourth link 24, the rotary connection pin 25, the connection pipe 26, and the connection pipe 27 are linked. It is a component of the mechanism 15 (movement mechanism). Since the link mechanism 15 includes the connection pipe 26 and the connection pipe 27, the left first link 17, the second link 18, the third link 21, the fourth link 24, the right first link 17, The two links 18, the third link 21, and the fourth link 24 rotate in synchronization with each other.
The link mechanism 15 can be deformed into a shortened state shown in FIG. 1, a maximum deployed state shown in FIG. 3, and a state between the shortened state and the maximum deployed state. A spring support pin 29 and a spring support pin 30 project from the right fixed portion 14 and the second link 18 in a fixed state, respectively, and a tension spring S1 (between the spring support pin 29 and the spring support pin 30 ( Both ends of the turnover spring are attached. When the link mechanism 15 is in a shortened state and a shape close to the shortened state, more specifically, when the axis of the tension spring S1 is located on the opposite side of the rotational connection pin 19 from the center point of the rotational connection pin 20 in a side view. The direction in which the end of the second link 18 on the side of the rotational connection pin 23 approaches the fixing portion 14 with respect to the right fixing portion 14 and the second link 18 from the tension spring S1 (the second link 18 in FIGS. 1 to 3). In the counterclockwise direction). On the other hand, when the link mechanism 15 is in the maximum deployed state and a shape close to the maximum deployed state, more specifically, the axis of the tension spring S1 is positioned closer to the rotary connection pin 19 than the center point of the rotary connection pin 20 in a side view. When the end of the second link 18 on the side of the rotational connection pin 23 is separated from the fixed portion 14 with respect to the right fixed portion 14 and the second link 18 from the tension spring S1 (second direction in FIGS. 1 to 3). The rotation biasing force in the direction in which the link 18 is rotated in the clockwise direction) is exerted.
Furthermore, both ends of lock pins 28 (engaging members at the time of storage), which are columnar members extending in the left-right direction, are fixed to the ends of the left and right first links 17 opposite to the rotation connection pins 19.

An ottoman 32 is attached to the front ends of the left and right third links 21 and the fourth link 24 of the link mechanism 15. The ottoman 32 includes a rectangular base plate 33 that is long in the left-right direction, a pair of left and right mounting brackets 34 that are fixed to the back surface of the base plate 33, and a cushion 35 that is fixed to the surface and peripheral surface of the base plate 33. Are provided.
The left and right mounting brackets 34 are rotatably connected to the left and right fourth link 24 by the pair of left and right rotational connection pins 37 extending in the direction parallel to the rotational connection pins 19 and 20. It is. The left and right mounting brackets 34 pass through the vicinity of the left and right ends of the rotary connection shaft 39 parallel to the connection pipes 26 and 27 so that they can rotate relative to each other. The end portions on the opposite side of the 21 rotational connection pins 23 are fixed. Since the ottoman 32 is thus rotatably supported by the link mechanism 15 (the third link 21 and the fourth link 24), the distance in the front-rear direction with respect to the fixed portion 14 in conjunction with the shortening operation and the unfolding operation of the link mechanism 15 To change. That is, when the link mechanism 15 is in the shortened state, the ottoman 32 is located at the storage position shown in FIG. 1, and when the link mechanism 15 in the shortened state is extended forward, the ottoman 32 is shown in FIGS. It is located at the use position (first, second, third use position).

  A movable lock member 40 having a substantially U-shaped cross section is attached to the rotary connecting shaft 39. The movable lock member 40 includes a pair of left and right groove forming pieces 41 and a connecting piece 42 that connects one ends of the left and right groove forming pieces 41, and is formed in a through hole formed in the left and right groove forming pieces 41. Two portions of the rotary connecting shaft 39 are fitted so as to be rotatable. Lock grooves 43, 44, 45 are formed side by side on the end surface of the left and right groove forming pieces 41 opposite to the connection piece 42. Each of the lock grooves 43, 44, 45 includes first opposing walls 43a, 44a, 45a and second opposing walls 43b, 44b, 45b that face each other. The groove widths of the openings 43c, 44c, 45c of the lock grooves 43, 44, 45 are wider than the diameter of the lock pin 28, and the groove widths of the lock grooves 43, 44, 45 are deeper than the openings 43c, 44c, 45c. The width gradually decreases toward the side (bottom side), and the groove width of the narrowest portion of the lock grooves 43, 44, 45 is narrower than the diameter of the lock pin 28. Furthermore, the openings 43c, 44c, and 45c side portions of the second opposing walls 43b, 44b, and 45b constitute stopper surfaces 43d, 44d, and 45d (the one-dot chain line in FIG. 6 corresponds to the stopper surfaces 43d, 44d, and 45d). Boundary position of other parts). As shown in the drawing, the height of the second facing wall 43b (from the bottom of the lock groove 43) is higher than that of the first facing wall 43a. Similarly, the height of the second opposing wall 44b (from the bottom of the locking groove 44) is higher than that of the first opposing wall 44a, and the height of the second opposing wall 45b (from the bottom of the locking groove 45) is the first. Higher than one opposing wall 45a.

A lock operation lever 48 located between the left and right mounting brackets 34 is attached to the back surface of the base plate 33. The lock operating lever 48 is fixed to the lever main body 49 having a pair of left and right pressing projections 50 extending in the front-rear direction and extending toward one side of the movable lock member 40, and the other end of the lever main body 49. And a cover member 56 made of synthetic resin. The lever body 49 is formed with two long holes 51 and 52 arranged side by side. Support bolts 53 and 54 are inserted into the long hole 51 and the long hole 52, respectively, and a male screw hole (not shown) formed on the back surface of the base plate 33 is a male screw formed on the support bolt 53 and the support bolt 54. Are screwed together. Accordingly, the lock operation lever 48 has a lock permissible position where one end of the long hole 51 and the long hole 52 abuts on the support bolt 53 and the support bolt 54, respectively, and the cover member 56 protrudes from the base plate 33 and the cushion 35. The other ends of the long hole 51 and the long hole 52 are in contact with the supporting bolt 53 and the supporting bolt 54, respectively, and the entire cover member 56 is opposed to the base plate 33, the cushion 35, and the ottoman 32 in the thickness direction ( It can slide in the front-rear direction with respect to the base plate 33 between the unlocked position retracted to the position where it no longer protrudes) (the base plate 33 cannot move relative to other directions). Furthermore, the front and rear end portions of the tension spring S2 are attached to the spring supporting protrusions 49a and the supporting bolts 54 protruding from the end of the lever body 49 opposite to the cover member 56, respectively. Since an urging force is always applied from the tension spring S2 to the lever main body 49 to slide the lever main body 49 toward the lock allowable position, the lever main body 49 is not applied to the lock operating lever 48 toward the lock release position. Is positioned at the lock allowable position by the urging force of the tension spring S2.
Further, both ends of the tension spring S3 are attached between the spring supporting protrusions 49a of the lever body 49 and the spring supporting protrusions 42a protruding from the connection piece 42, respectively. Therefore, an urging force in a direction for causing the movable lock member 40 to approach the base plate 33 is always applied to the movable lock member 40 from the tension spring S3.
When the lock operating lever 48 is positioned at the lock allowable position and no force other than the urging force of the tension spring S3 is applied to the movable lock member 40, the movable lock member 40 receiving the rotation urging force of the tension spring S3 is the base. Approach the plate 33 side.

  The cover member 56 is integrally provided with a pair of left and right engaging members 57 (locking members at the time of storage). A guide groove 58 extending toward the base end side of the engagement member 57 and gradually narrowing toward the base end side is formed on the distal end surface of the engagement member 57. A storage position holding groove 59 that is circular in cross section and communicates with the guide groove 58 is formed on the back side. The width of the rear end of the guide groove 58 when the engaging member 57 is in the free state is narrower than the diameter of the lock pin 28, and the diameter of the storage position holding groove 59 when the engaging member 57 is in the free state is locked. It is slightly narrower than the diameter of the pin 28.

Next, the operation of the ottoman device 13 will be described.
When the link mechanism 15 is in the shortened state, the ottoman 32 is substantially orthogonal to the horizontal direction as shown in FIG. Further, the lock pin 28 is engaged with the left and right storage position holding grooves 59 while elastically deforming the left and right engagement members 57. At this time, the deformable direction of the link mechanism 15 (the deformation direction toward the maximum unfolded state) and the sliding direction of the lock operation lever 48 with respect to the base plate 33 are different from each other. If one of them tries to move, both will be mechanically twisted. Therefore, the movement of the lock operating lever 48 toward the unlock position is reliably restricted, and the extension operation of the link mechanism 15 in the maximum deployed state is restricted (the locking of the engagement member 57 and the lock pin 28 described later is locked). The extension mechanism for performing the releasing operation is allowed), the link mechanism 15 is held in the shortened state, and the lock operation lever 48 is securely held in the lock allowable position. Further, at this time, the movable lock member 40 approaching the base plate 33 side by the rotational biasing force of the tension spring S3 comes into contact with the left and right pressing protrusions 50 of the lever main body 49, so that the closest approach position shown in FIG. Retained.
If the passenger pulls the lock pin 28 out of the storage position holding groove 59 and the guide groove 58 while elastically deforming the engaging member 57 by hand (when the link mechanism 15 is slightly extended), the ottoman 32 can move forward. It becomes a state. If a forward moving force is applied to the ottoman 32 without operating the lock operation lever 48 in this state, the ottoman 32 moves forward with the extension operation of the link mechanism 15, and the relative relationship between the lock pin 28 and the movable lock member 40 is reached. The position changes gradually. When the lock pin 28 approaches the opening 43c of the lock groove 43, the lock pin 28 that has passed outside (directly above) the opening 43c contacts the stopper surface 43d of the lock groove 43 as shown by the phantom line in FIG. To do. As shown in FIG. 6, the boundary position between the stopper surface 43d and the other part of the second opposing wall 43b (see the alternate long and short dash line in FIG. 6) passed while grazing the end surface on the opening 43c side of the first opposing wall 43a. The movement locus of the center point of the lock pin 28 is a position where it intersects the second opposing wall 43b. The lock pin 28 that is in contact with the stopper surface 43 d smoothly passes through the opening 43 c that is wider than the diameter of the lock pin 28 and moves to the back side of the lock groove 43. Since the groove width of the predetermined portion on the back side of the lock groove 43 is the same as that of the lock pin 28, rattling between the lock pin 28 and the lock groove 43 is eliminated when the lock pin 28 is engaged with the portion of the lock groove 43. The position of the movable lock member 40 at this time is the lock position, which is a position farther from the base plate 33 than the closest approach position (position in FIG. 1). Since the rotational biasing force toward the lock position is always applied from the tension spring S3 to the movable lock member 40, the ottoman 32 is held in a stable state at the first use position shown in FIG. The passenger's foot seated on the seat 10 can be supported by the cushion 35 in a stable state.

When it is desired to move the ottoman 32 further to the front use position, the passenger presses the lock operation lever 48 (cover member 56) backward against the urging force of the tension spring S2 by hand or the like to reach the lock allowable position. The lock operation lever 48 that has been positioned is slid to a lock release start position between the lock allowable position and the lock release position. Then, the left and right pressing protrusions 50 that are separated from the connection piece 42 press the connection piece 42, so that the movable lock member 40 rotates in a direction away from the base plate 33 while elastically deforming the tension spring S 3 in the extension direction. .
As shown in FIG. 7A, the urging force (tensile force) of the tension spring S3 when the lock operation lever 48 is located at the lock allowable position is F, and connects the rotary connection shaft 39 and the spring support protrusion 42a. The angle formed between the first straight line L1 and the second straight line L2, which is the axis of the tension spring S3, is θ1 (first acute angle) smaller than 90 °. Accordingly, the rotational biasing force (component force of the biasing force F) applied to the movable lock member 40 by the tension spring S3 at this time is F1 (= F · sin θ1). On the other hand, as shown in FIG. 7B, the urging force (tensile force) of the tension spring S3 when the lock operation lever 48 moves to the unlock start position is F ′, and the first straight line L1 and the second straight line L2 are The angle formed is θ2 (second acute angle) smaller than θ1. At this time, the rotational biasing force (component force of the biasing force F ′) applied to the movable lock member 40 by the tension spring S3 is F2 (= F ′ · sin θ2), and F2 <F1. Thus, the rotational biasing force applied to the movable lock member 40 by the tension spring S3 when the lock operation lever 48 is moved to the unlock start position is reduced, so that the tension from the tension spring S3 to the movable lock member 40 is moved to the lock position side. Although the urging force is applied, the lock operation lever 48 can be smoothly slid to the lock release position side with a small force.

Then, when the movable lock member 40 rotates to the unlock position shown in FIG. 5 by sliding the lock operation lever 48 to the unlock position, the lock pin 28 escapes to the outside (upward) of the lock groove 43. When the lock operation lever 48 is returned to an intermediate position between the unlocking position and the lock permissible position after the escape, and the ottoman 32 is moved further forward, the lock pin 28 passed through the outside (directly above) the opening 44c of the lock groove 44. Contacts the stopper surface 44d of the lock groove 44 (see the phantom line in FIG. 6). As shown in FIG. 6, the boundary position between the stopper surface 44d and the other part of the lock groove 44 (see the two-dot chain line in FIG. 6) is passed through the end face on the opening 44c side of the first opposing wall 44a while grazing. The movement locus of the center point of the pin 28 is a position where it intersects the second opposing wall 44b. Thereafter, when the movable lock member 40 is moved to the lock position by returning the lock operation lever 48 to the lock allowable position, the lock pin 28 smoothly passes through the opening 44 c and moves to the back side of the lock groove 44, and the lock groove 44. The lock pin 28 is engaged with a portion having the same width. Then, rattling between the lock pin 28 and the lock groove 44 is eliminated, so that the ottoman 32 is held in a stable state at a second use position (not shown).
Furthermore, when the movable lock member 40 is rotated to the unlock position by rotating the lock operation lever 48 to the unlock position in this state, the lock pin 28 escapes to the outside (upward) of the lock groove 44. When the ottoman 32 is moved further forward after the escape, the lock pin 28 that passes through the outside (directly above) the opening 45c of the lock groove 45 contacts the stopper surface 45d of the lock groove 45 (see the phantom line in FIG. 6). . As shown in FIG. 6, the boundary position between the stopper surface 45d and the other part in the lock groove 45 (see the two-dot chain line in FIG. 6) is passed through the end face on the opening 45c side of the first opposing wall 45a while grazing. The movement locus of the center point of the pin 28 is a position where it intersects the second opposing wall 45b. After that, when the movable lock member 40 is moved to the lock position by returning the lock operation lever 48 to the lock allowable position, the lock pin 28 smoothly passes through the opening 45c and moves to the back side of the lock groove 45, and the lock groove It engages with a portion having the same width as the 45 lock pins 28. Then, rattling between the lock pin 28 and the lock groove 45 is eliminated, so that the ottoman 32 is stably held at the third use position shown in FIG.
On the other hand, when the ottoman 32 is held at the first use position, the ottoman 32 is moved forward while the lock operation lever 48 is kept at the unlock position (the movable lock member 40 is kept at the unlock position). , The lock pin 28 approaches the lock groove 45 after passing over the opening 44c of the lock groove 44, and contacts the stopper surface 45d after passing the outside of the opening 45c of the lock groove 45. Accordingly, also in this case, the lock pin 28 smoothly passes through the opening 45c and then engages with the portion of the lock groove 45 (the portion having the same width as the lock pin 28).

When returning the ottoman 32 held at the first, second, and third use positions to the retracted position, the movable lock member 40 that has been located at the lock position by first pressing the lock operation lever 48 to the unlock position. Is rotated to the unlocked position to allow the lock pin 28 to escape to the outside (upward) of the lock groove 43 (44, 45), and then the ottoman 32 is pressed backward. Then, the link mechanism 15 performs a shortening operation while resisting the urging force of the tension spring S1 (rotational urging force in the direction in which the end portion of the second link 18 on the rotation connecting pin 23 side is separated from the fixing portion 14) by this pressing force. When the axial line of the tension spring S1 moves beyond the center point of the rotation connection pin 20 to the opposite side to the rotation connection pin 19 in a side view, the biasing force of the tension spring S1 (on the rotation connection pin 23 side of the second link 18) (The rotation biasing force in the direction in which the end of the ottoman 32 approaches the fixed portion 14) and the weight of the ottoman 32 cause the link mechanism 15 to move to the retracted position while being in the shortened state. When the passenger releases the pressing force to the lock operation lever 48 while the ottoman 32 moves to the retracted position, the lock operation lever 48 returns to the lock allowable position by the urging force of the tension spring S2.
When the ottoman 32 reaches the position immediately before the storage position, the lock pin 28 automatically engages the left and right storage position holding grooves 59 while elastically deforming the engaging member 57, so that the ottoman 32 moves to the storage position. Then, the ottoman 32 is held at the storage position and the link mechanism 15 is held in a shortened state.

  According to the embodiment described above, the lock mechanism (lock mechanism in use) for holding the ottoman 32 in the first, second, and third use positions is the lock pin 28 and the lock grooves 43, 44, 45. Therefore, the lock mechanism can be made simple and inexpensive.

Further, the movable lock member 40 is urged to the lock position side by the tension spring S3, and the lock operation lever 48 is held at the lock allowable position by the urging force of the tension spring S2, so that the ottoman 32 is moved to the first, second, It can be securely held in the third use position.
Further, the rotational biasing force (F2) of the tension spring S3 against the movable lock member 40 when the lock operation lever 48 is slid to the unlocking start position is made smaller than the rotational biasing force (F1) when it is positioned at the lock allowable position. Therefore, the operability of the lock operation lever 48 is good even though the rotational biasing force toward the lock position is applied from the tension spring S3 to the movable lock member 40.

Further, since the holding of the link mechanism 15 in the shortened state and the holding of the lock operating lever 48 at the lock allowable position are realized by a lock mechanism having a simple structure including the lock pin 28 and the engaging member 57, the lock It is possible to reduce the manufacturing cost of the mechanism.
In addition, the locking mechanism of the link mechanism 15 (the locking mechanism at the time of storage) in which the lock pin 28 and the engaging member 57 are in the retracted state is also used as the locking mechanism (the locking mechanism at the time of storage) for the lock operating lever 48. Reference numeral 28 also serves as a lock mechanism (lock mechanism in use) of the link mechanism 15 when the ottoman 32 is located at the first, second, and third use positions. Therefore, the vehicle seat 10 is provided with a lock mechanism for holding the ottoman 32 in the use position (lock mechanism during use) and a lock mechanism for holding the ottoman 32 in the storage position (lock mechanism during storage). Therefore, the structure is not extremely complicated and the manufacturing cost is not significantly increased.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this embodiment, It can implement, giving various deformation | transformation.
For example, the lock pin 28 may be provided on the ottoman 32 side, and the movable lock member 40 (lock grooves 43, 44, 45) may be provided on the link mechanism 15 side. Further, one of the movable lock member 40 and the lock operation lever 48 is provided on one of the ottoman 32 and the link mechanism 15, and the other of the movable lock member 40 and the lock operation lever 48 is provided on the other of the ottoman 32 and the link mechanism 15. Also good.
Further, the lock operation lever 48 may be rotatably attached to one of the ottoman 32 and the link mechanism 15. Also in this case, the total length of the tension spring S3 when the lock operation lever 48 is moved to the unlocking start position is set to be shorter than that when it is positioned at the lock allowable position.
Further, the number of lock grooves formed in the movable lock member 40 may not be three, but may be one, two, or a plurality of four or more.
Furthermore, the lock pin 28 may be provided on the lock operation lever 48 side, and the engagement member 57 may be provided on the link mechanism 15 side.
Further, the rotary connection pins 19 and 20 may be attached to the seat cushion 11 after the fixing portion 14 is omitted.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 11 Seat cushion 13 Ottoman device 14 Fixing part 15 Link mechanism (movement mechanism)
17 1st link 18 2nd link 19 20 Rotation connection pin 21 3rd link 22 23 Rotation connection pin 24 4th link 25 Rotation connection pin 26 27 Connection pipe 28 Lock pin (locking mechanism at the time of use) (engaging member at the time of storage)
29 30 Spring support pin 32 Ottoman 33 Base plate 34 Mounting bracket 35 Cushion 37 Rotation connection pin 39 Rotation connection shaft 40 Movable lock member 41 Groove formation piece 42 Connection piece 42a Spring support protrusion 43 44 45 Lock groove (lock mechanism in use) )
43a 44a 45a First opposing wall 43b 44b 45b Second opposing wall 43c 44c 45c Opening 43d 44d 45d Stopper surface 48 Lock operating lever 49 Lever main body 49a Spring support protrusion 50 Press protrusion 51 52 Long hole 53 54 Support bolt 56 Cover member 57 Engagement member (locking member when retracted)
58 Guide groove 59 Storage position holding groove S1 Tension spring S2 Tension spring S3 Tension spring

Claims (4)

A fixing part for fixing to the vehicle seat;
An ottoman movable between a storage position approaching the fixed portion and a use position spaced apart from the fixed portion;
A moving mechanism provided between the fixed portion and the ottoman for moving the ottoman to the storage position and the use position;
An in-use lock mechanism capable of transitioning between an unlocked state that allows movement of the moving mechanism and a locked state that restricts movement of the moving mechanism and holds the ottoman in the use position;
A lock operation lever supported by the ottoman and movable to a lock allowable position for shifting the lock mechanism in use to the locked state and a lock release position for shifting the lock mechanism in use to the unlocked state;
An engaging member for storage provided in the moving mechanism;
A storage lock member that is provided on the lock operation lever and holds the ottoman in the storage position and holds the lock operation lever in the lock allowable position by engaging with the storage engagement member;
An ottoman device for a vehicle seat, comprising: The ottoman device for a vehicle seat according to claim 1,
One of the engaging member at the time of storage and the locking member at the time of storage is a lock pin,
An ottoman device for a vehicle seat, the other being a storage position holding groove that can be engaged with and disengaged from the lock pin and engages with the lock pin when the ottoman is positioned at the storage position. The ottoman device for a vehicle seat according to claim 2 ,
When using the above locking mechanism,
The lock pin which is the engaging member at the time of storage;
A lock groove that moves together with the ottoman and is detachable from the lock pin, and engages the lock pin when the ottoman is in the use position;
An ottoman device for a vehicle seat comprising: The ottoman device for a vehicle seat according to any one of claims 1 to 3,
The lock operation lever is supported by the ottoman so as to be movable only in the sliding direction,
An ottoman device for a vehicle seat in which a direction in which the ottoman moves from the storage position to the use position is different from a sliding direction of the lock operation lever when the ottoman is positioned at the storage position.

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