JP6495049B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device that locks / unlocks a seat having a seat back provided to be tiltable in the front-rear direction with respect to a seat cushion.

Among vehicle seats, there is a tumble seat (a flip-up type seat) in which a seat back of a rear seat (second seat, third seat) is tilted forward and the seat is flipped up to form a luggage compartment there.
This tumble seat is usually formed with a groove into which a striker provided on the floor can enter, and can be rotated from an unlocked position where the striker can enter the groove to a locked position where prohibiting the striker from being removed from the groove, The hook and the striker biased in the unlock position direction are provided so as to be rotatable on the opposite side of the hook, and are biased in the direction of engaging with the hook and engaged with the hook positioned at the lock position. Thus, the hook has a pole that prohibits rotation of the hook, and is fixed to the floor by a lock mechanism that can lock / unlock the striker provided on the floor.

  In general, if the seat back of the seat locked to the striker on the floor is tilted forward from the seatable position, the tumble seat pushes the pole in a direction that disengages the hook and passes the over position where it cannot be seated. When the seat back is tilted further forward from the over position, the contact with the pole is canceled and the lock mechanism can be re-locked against the striker. A canceling mechanism for setting the state is provided (for example, see Patent Document 1).

Japanese Patent No. 4172756

However, since the cancellation mechanism having the above-described configuration is provided on the hook side with the striker trajectory as the center, there are the following problems.
(1) The distance between the cancellation mechanism and the pole becomes longer, and the cancellation mechanism becomes huge.
(2) The movement trajectory of the part that moves the cancel mechanism pole increases.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lock device in which the cancel mechanism is small and the movement trajectory of the component that moves the pole of the lock mechanism is small.

In order to achieve at least one of the problems described above, a locking device reflecting one aspect of the present invention is:
A locking device that locks / unlocks a seat with a seat back provided to be tiltable in the front-rear direction with respect to a seat cushion,
A groove is formed in which the striker provided on the floor can enter, and the striker can rotate from an unlock position where the striker can enter the groove to a lock position where the striker is prevented from being separated from the groove, and is unlocked. A hook biased in the direction, which is rotatably provided on the opposite side of the hook with respect to the approach locus of the striker, is biased in a direction to engage with the hook, and is associated with the hook positioned at the lock position. A lock mechanism that has a pole that prohibits rotation of the hook by combining, and that can be locked / unlocked with respect to the striker provided on the floor;
When the seat back of the seat locked to the striker on the floor is tilted forward in the seat cushion direction, the pole is pressed to disengage the pole from the hook, and the seat back is tilted forward. When the further advances, has a cancel mechanism that cancels the pressing to the pole,
The cancel mechanism is configured to press against a radially outer peripheral surface of the pole and is disposed on the pole side of the pole and the hook .

  Other features of the present invention will become more apparent from the following detailed description and accompanying drawings.

According to the locking device of the present invention, the cancel mechanism presses the outer circumferential surface of the pole in the radial direction, and is disposed on the pole side of the pole and the hook , thereby disabling the distance between the cancel mechanism and the pole. Becomes shorter and the cancellation mechanism becomes smaller. In addition, the movement trajectory of the part that moves the pawl of the cancel mechanism is reduced.

  Other effects of the present invention will become more apparent from the following detailed description and accompanying drawings.

It is a disassembled perspective view of the locking device of this embodiment. FIG. 2 is a view in the direction of the arrow II in FIG. 1 when the lock device in FIG. 1 is assembled. FIG. 3 is a view in the direction of the arrow III in FIG. 1 when the locking device in FIG. 1 is assembled. It is a figure explaining a series of operation | movement of the tumble seat provided with the locking device of this embodiment. It is a block diagram of the locking device shown in FIG. 1 in the state of (a) of FIG. It is a block diagram of the locking device shown in FIG. 1 in the state of (b) of FIG. It is a block diagram of the locking device shown in FIG. 1 in the state of (d) of FIG. It is a block diagram of the locking device shown in FIG. 1 in the state of (e) of FIG. It is a block diagram of the locking device shown in FIG. 1 in the state of (h) of FIG. It is a block diagram of the locking device shown in FIG. 1 in the state of (i) of FIG.

  This will be described with reference to the drawings. 1 is an exploded perspective view of the locking device of the present embodiment, FIG. 2 is a view taken in the direction of the arrow II in FIG. 1 when the locking device of FIG. 1 is assembled, and FIG. 3 is a diagram when the locking device of FIG. FIG. 4 is a view for explaining a series of operations of the tumble seat provided with the locking device of the present embodiment, and FIG. 5 is a view shown in FIG. 1 in the state of FIG. 6 is a block diagram of the locking device shown in FIG. 1 in the state of FIG. 4B, and FIG. 7 is a block diagram of the locking device shown in FIG. 1 in the state of FIG. 4D. 8 is a block diagram of the locking device shown in FIG. 1 in the state of FIG. 4E, FIG. 9 is a block diagram of the locking device shown in FIG. 1 in the state of FIG. 4H, and FIG. It is a block diagram of the locking device shown in FIG. 1 in the state of (i) of FIG.

<Overall configuration>
A tumble seat provided with the locking device of the present embodiment will be described with reference to FIG. The tumble seat 1 includes a seat cushion 3 that supports a seated person's buttocks and a seat back 5 that supports the seated person's back. The tumble seat 1 has a reclining device (not shown), and the seat back 5 can tilt in the front-rear direction with respect to the seat cushion 3.

A front portion of the seat cushion 3 is attached to the floor F via a hinge mechanism 7.
A lock device 9 that can be locked / unlocked by a striker (see FIG. 1) provided on the floor F is provided at the rear portion of the seat cushion 3. Therefore, by unlocking the lock device 9, the tumble seat 1 can be flipped up with respect to the floor F around the hinge mechanism 7.
<Locking device 9>
The locking device 9 will be described with reference to FIGS. A striker 10 is provided on the floor F.

  In the figure, an attachment 11 serving as a base of the locking device 9 is provided at the rear portion of the seat cushion 3 of the tumble seat 1. A lock mechanism 51 is provided on one surface side of the attachment 11, and a cancel mechanism 101 is provided on the other surface side. The lock mechanism 51 of the present embodiment is configured to assemble a lock mechanism assembly in which a portion surrounded by a broken line in FIG.

Here, the lock mechanism 51 will be described.
A groove 53 a into which the striker 10 can enter is formed in the base 53 of the lock mechanism 51. A hook 55 is disposed on one side of the groove 53a, and a pole 61 is disposed on the other side.

  A through hole 55 b is formed in the hook 55. The base 53 is formed with a hole 53b that faces the hole 55b of the hook 55 and has a diameter slightly smaller than the diameter of the hole 55b of the hook 55. The hook 55 is rotatably attached to the base 53 by a shaft 59 that is inserted through the hole 55b of the hook 55 and one end of which is caulked to the hole 53b of the base 53. At the other end of the shaft 59, a flange portion 59a that prohibits the hook 55 from being detached from the base 53 is formed.

  The hook 55 is formed with a groove 55a into which the striker 10 can enter. In this embodiment, as shown in FIG. 1-3, the depth direction of the groove 55a of the hook 55 intersects the depth direction of the groove 53a of the base 53, and the hook that prohibits the removal of the striker 10 engaged with the groove 55a. As shown in FIG. 8, the depth direction of the groove 55a of the hook 55 is along the depth direction of the groove 53a of the base 53, and the position where the striker 10 can enter the groove 55a of the hook 55 is shown. This is called the unlock position.

A first convex portion 55 c and a second convex portion 55 d are formed on the radially outer peripheral surface of the hook 55 along the rotation direction of the hook 55 to the unlock position. A recess 55e is formed between the first protrusion 55c and the second protrusion 55d.
Next, a through hole 61 c is also formed in the pole 61. The base 53 is formed with a hole 53c that faces the hole 61c of the pole 61 and has a diameter slightly smaller than the diameter of the hole 61c of the pole 61. The pole 61 is rotatably attached to the base 53 by a shaft 65 that is inserted through the hole 61 c of the pole 61 and one end of which is caulked to the hole 53 c of the base 53. At the other end portion of the shaft 65, a collar portion 65a that prohibits the pole 61 from being detached from the base 53 is formed.

On the surface of the pole 61 that faces the hook 55, a first convex portion 61a that can be engaged and disengaged with the concave portion 55e of the hook 55 is formed. Further, a concave portion 61b into which the second convex portion 55d of the hook 55 can enter is formed on the surface of the pole 61 facing the hook 55.
A spring (spiral spring) 69 is disposed between the base 53 and the hook 55 so as to wind a cylindrical shaft 59 having both open end surfaces. The outer end of the spring 69 is locked to a projection (not shown) formed on the hook 55, and the inner end is locked to the base 53. The hooks 55 are urged by the springs 69 in the unlock position direction (the arrow UL direction in FIG. 1).

  A spring (spiral spring) 71 is disposed between the base 53 and the pole 61 so as to wind a cylindrical shaft 65 whose both end surfaces are open surfaces. The outer end portion of the spring 71 is locked to a protrusion (not shown) formed on the pole 61, and the inner end portion is locked to the base 53. The spring 61 biases the pole 61 in a direction to engage with the hook 55 (in the direction of arrow E in FIG. 1).

The attachment 11 is formed with a hole 11b and a hole 11c facing the shaft 59 and the shaft 65. The shaft 11 and the shaft 63 are erected on the attachment 11 using the hole 11b and the hole 11c. Yes.
In addition, a cushion rubber 67 is provided in the groove 53 a of the base 53, so that the striker 10 that enters the base 53 comes into contact therewith and cushions the impact between the striker 10 and the base 53.
<Cancellation mechanism>
The cancel mechanism 101 will be described with reference to FIGS. As shown in FIG. 3, the cancel mechanism 101 according to the present embodiment is arranged on the pole 61 side with the approach locus of the striker 10 (dashed line t in FIG. 3) as the center.

  A first cancel link 105 is rotatably attached to the attachment 11 using a hinge pin 103. The cable 107 that transmits the tilt of the seat back 5 includes an outer tube 107a and an inner cable 107b provided in the outer tube 107a. The end portion of the outer tube 107a in the vicinity of the cancel mechanism 101 is locked to the locking portion 11d of the attachment 11, and the inner cable 107b is a cable formed at a location other than the rotation center (hinge pin 103) of the first cancel link 105. Locked to the locking portion 105b.

  On the 1st cancellation link 105, the 2nd cancellation link 111 is rotatably provided in the location other than the rotation center (hinge pin 103) of the 1st cancellation link 105 using the hinge pin 109. As shown in FIG. A cancel pin 113 is provided on the second cancel link 111 at a location other than the rotation center (hinge pin 109) of the second cancel link 111.

  The cancel pin 113 is inserted into the arc-shaped elongated hole 105a formed in the first cancel link 105 and the hole 11e formed in the attachment 11, and one surface side of the attachment 11 (the lock mechanism 51 is provided). Side) and can come into contact with the pole 61 of the lock mechanism 51.

  Furthermore, since the other end of the spring 115 whose one end is locked to the spring locking portion 11 f of the attachment 11 is locked to the cancel pin 113, the cancel pin 113 is the arc-shaped length of the first cancel link 105. It is urged in a direction to contact the lower end of the hole 105a.

Here, the part where the cancel pin 113 of the pole 61 contacts will be described. In the present embodiment, the cancel pin 113 can abut on the outer circumferential surface of the pole 61 in the radial direction.
A second convex portion 61e is formed on the outer circumferential surface of the pole 61 in the radial direction, and a spring 71 is attached to the second convex portion 61e by a pressing contact of a cancel pin 113 accompanying a forward tilt of a seat back 5 described later. An unlocking surface (standing wall surface) 61d that receives a force for rotating the pole 61 in the direction of disengaging (disengaging) from the hook 55 against the force is formed. The top of this unlocking surface 61d is a radially outer peripheral surface that is furthest away from the rotation center (shaft 65) of the pole 61. That is, the unlocking surface 61d is formed on the radially outer peripheral surface farthest from the rotation center (shaft 65) of the pole 61.

Next, the operation of the locking device having the above configuration will be described with reference to FIGS.
<Available seating>
In a state where the user can sit on the tumble seat 1 shown in FIG. 4A, the lock device 9 is in the state shown in FIG. In FIG. 5, the hook 55 of the locking mechanism 51 is in the locked position, the striker 10 is engaged with the groove 55 a, the concave portion 55 e of the hook 55 and the first convex portion 61 a of the pole 61 are engaged, Rotation in the unlock position direction is prohibited (locked state).

At this time, the cancel pin 113 of the cancel mechanism 101 is in contact with the lower end of the arc-shaped elongated hole 105 a of the first cancel link 105 by the urging force of the spring 115.
<Tumble sheet up>
The reclining device of the tumble seat 1 is unlocked, and the seat back 5 in a seatable position as shown in FIG. The inner cable 107b of the cable 107 is pulled according to the forward tilt of the seat back 5, the first cancel link 105 rotates against the biasing force of the spring 115, and the cancel pin 113 is connected to the second convex portion 61e of the pole 61. The unlocking surface 61d is pressed against. For this reason, the pole 61 starts to rotate in the direction of separating from the hook 55 (the direction in which the pole 61 is disengaged from the hook 55).

When the seat back 5 passes the over position shown in FIG. 4B, the engagement between the concave portion 55e of the hook 55 and the first convex portion 61a of the pole 61 is released as shown in FIG. The pole 61 is disengaged.
Then, the hook 55 is rotated in the unlock position direction by the urging force of the spring 69, and the striker 10 can be detached from the groove 55a of the hook 55 (unlockable state).

When the lock mechanism 51 is unlocked, the tumble seat 1 can be flipped up around the hinge mechanism 7 as shown in FIG.
When the seatback 5 is further tilted forward while the tumble seat 1 is being lifted up, the inner cable 107b is further pulled and the first cancel link 105 is further rotated. As shown in FIG. While abutting on the unlocking surface 61d of the two convex portions 61e, it moves in a direction away from the center of rotation of the pole 61 and reaches the top of the unlocking surface 61d.
(Immediately before the cancellation mechanism is activated).

  As shown in FIG. 4D, when the seat back 5 is tilted forward until it substantially overlaps the seat cushion 3, the first cancel link 105 is further rotated by the inner cable 107b as shown in FIG. Is away from the unlocking surface 61d of the second convex portion 61e of the pole 61, and the force to push the pole 61 away from the hook 55 is lost. For this reason, the pole 61 rotates in a direction to engage with the hook 55 by the biasing force of the spring 71, the first convex portion 61a of the pole 61 abuts on the first convex portion 55c of the hook 55, and the lock mechanism 51 is restarted. It becomes a lockable state.

  Then, when the tumble seat 1 is further flipped up from the state of FIG. 4D and the seat back 5 is overlaid on the seat cushion 3, the seat back 5 is completely attached to the seat cushion 3 as shown in FIG. In a state where the tumble sheet 1 is overlapped with the tumble state, the tumble sheet 1 is completely tapped up.

  From this tumble state, the tumble seat 1 is returned to the original position as shown in FIG. 4 (f), and the tumble in a state where the seat back 5 overlaps the seat cushion 3 as shown in FIG. 4 (g). When the seat 1 returns to the original position, the striker 10 of the floor F is engaged with the groove 55a of the hook 55, and the striker 10 pushes the groove 55a of the hook 55 to rotate the hook 55 in the unlock position to the lock position direction. . When the hook 55 rotates to the hook position, as shown in FIG. 9, the first convex portion 61a of the pole 61 engages with the concave portion 55e of the hook 55, and the locked state in which the rotation of the hook 55 in the unlock position direction is prohibited. Thus, the tumble sheet 1 is prohibited from being flipped up.

  As shown in FIG. 4 (h), when the seat back 5 of the tumble seat 1 is tilted backward, the inner cable 107b of the cable 107 is returned in accordance with the backward tilt of the seat back 5. Therefore, the first cancel link 105 tries to return toward the original position by the biasing force of the spring 115. At this time, the cancel pin 113 provided on the second cancel link 111 abuts on the second convex portion 61 e of the pole 61. When the seat back 5 of the tumble seat 1 is further tilted backward as shown in FIG. 4 (i), the cancel pin 113 resists the urging force of the spring 115 as shown in FIG. Then, while moving in the elongated hole 105a of the first cancel link 105, it moves on the second convex portion 61e of the pole 61 and returns to the state of FIG.

According to the above configuration, the following effects can be obtained.
(1) Since the cancel mechanism 101 according to the present embodiment is arranged on the pole 61 side with the approach locus t of the striker 10 as the center, the distance between the cancel mechanism 101 and the pole 61 is shortened, and the cancel mechanism 101 is reduced in size. Can be In addition, the movement locus of the first cancellation link 105, which is a component that moves the pole 61 of the cancellation mechanism 101, is also reduced.

 (2) When the lock mechanism 51 is in the locked state (FIGS. 5 and 6), the pawl 61 of the lock mechanism 51 and the cancel pin 113 of the cancel mechanism 101 are in contact with each other. It is possible to prevent the parts from striking each other at the time of pressing and generating abnormal noise or deformation of the parts.

(3) Since the cancel mechanism 101 abuts on the outer circumferential surface of the pole 61 in the radial direction, it is not necessary to form a hole or the like in the pole 61 and the strength of the pole 61 does not decrease.
(4) Since the unlock surface 61d of the pole 61 is formed on the radially outer peripheral surface farthest from the center of rotation of the pole 61, the cancel mechanism can drive the pole 61 with a small force.

10 striker 51 lock mechanism 55 hook 101 cancel mechanism 61 pole

Claims (4)

A locking device that locks / unlocks a seat with a seat back provided to be tiltable in the front-rear direction with respect to a seat cushion,
A groove is formed in which the striker provided on the floor can enter, and the striker can rotate from an unlock position where the striker can enter the groove to a lock position where the striker is prevented from being separated from the groove, and is unlocked. A hook biased in the direction, which is rotatably provided on the opposite side of the hook with respect to the approach locus of the striker, is biased in a direction to engage with the hook, and is associated with the hook positioned at the lock position. A lock mechanism that has a pole that prohibits rotation of the hook by combining, and that can be locked / unlocked with respect to the striker provided on the floor;
When the seat back of the seat locked to the striker on the floor is tilted forward in the seat cushion direction, the pole is pressed to disengage the pole from the hook, and the seat back is tilted forward. When the further advances, has a cancel mechanism that cancels the pressing to the pole,
The cancel mechanism is disposed on the pole side of the pole and the hook by pressing against the radially outer peripheral surface of the pole. When the locking mechanism is in the locked state,
The lock device according to claim 1, wherein the pawl of the lock mechanism and the cancel mechanism are in contact with each other. The locking device according to claim 1, wherein the cancel mechanism presses a radially outer peripheral surface farthest from a rotation center of the pole . The locking device has a base attachment,
The cancellation mechanism is
A first cancel link that interlocks with the seat back, a second cancel link that rotates together with the first cancel link, and a spring that urges the second cancel link in a direction to contact the locked pole And
4. The lock according to claim 3 , wherein one end of the spring is locked to the second cancel link and the other end is locked to the attachment, and the first cancel link is biased via the second cancel link. apparatus.

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