JP7400513B2 - locking device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a locking device.

A hook (also called a latch) that holds a striker and a pole (also called a ratchet) that locks a vehicle seat or an opening/closing body of a vehicle (such as a bonnet or trunk lid) and a hook (also called a latch) that holds the striker. A locking device equipped with the following is widely used (for example, Patent Document 1). In this type of locking device, the hook is biased toward the striker release position where the striker is released and the lock is released, and when the pole locks the hook, the hook resists the biasing force and moves the hook to the striker holding position. to keep it in the locked state. When an operating force for unlocking is input to the pole, the pole rotates to release the lock from the hook, and the biasing force rotates the hook toward the striker release position to enter the unlocked state.

Special Publication No. 2006-516502

In conventional locking devices, the biasing force of the biasing means (spring, etc.) that biases the hook alone cannot ensure the movement of the hook from the striker holding position to the striker release position (lock release operation) when unlocking. There was a possibility that it could not be executed. For example, in vehicle seat locking devices, large movement resistance was applied to the hook due to the weight of the seat, so even if the pole was released, the hook could not move smoothly to the striker release position. .

Some types of locking devices include a damper member that a striker comes into contact with in a locked state. The damper member is made of an elastic body, and in the locked state is pressed by the striker and elastically deforms. Then, during the unlocking operation, the damper member presses the striker with the force of restoring from the elastic deformation, thereby assisting the unlocking operation. However, in a type of locking device that does not include such a damper member, the damper member cannot assist in unlocking operation.

A possible solution to the above problems is to increase the biasing force of the hook biasing means to increase the reliability of the hook operation when releasing the lock. However, if the biasing force of the biasing means is increased, there is a risk of resistance to movement of the hook to the striker holding position when the striker is placed in the locked state. Furthermore, it may be difficult to use a large and powerful biasing means due to constraints on installation space. Therefore, it has been desired to improve the operability of the hook when releasing the lock by a method other than increasing the biasing means.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a locking device with a simple configuration and excellent operability during unlocking.

The locking device of the present invention includes a hook operable between a striker holding position for holding the striker and a striker release position for releasing the striker, and a locking position for restricting movement of the hook from the striker holding position to the striker release position. A pole that is operable to an unlock position that allows the hook to move from a striker holding position to a striker release position, and a holding member that holds the hook in the striker holding position when the pole is in the locked position. moves from the locked position to the unlocked position, one of the pole and the holding member presses the other, and the other of the pole and holding member presses the hook from the striker holding position to the striker release position , and the pole and holding member press the hook from the striker holding position to the striker release position. is characterized in that it is coaxially and rotatably supported .

When the pole has a locking part that locks the hook in the striker holding position at the lock position, and a linking part that contacts the pressing member and transmits force when rotating from the lock position to the unlock position, By configuring the structure in which the amount of protrusion of the linking portion is larger than the amount of protrusion of the locking portion from the center of rotation of the pole, the hook can be pressed efficiently.

The hook has a striker holding groove into which the striker enters at the striker holding position, and a pair of arm portions located on both sides of the striker holding groove. It is preferable to have a pressing part.

According to the present invention, by pressing the hook toward the striker release position when the lock is released through the pole and the pressing member, the hook is reliably moved to the striker release position and the operability when the lock is released is improved. can be improved. Since the pole and presser member that lock and hold the hook in the locked state are also used to press the hook when unlocking, the effect can be achieved with a simple configuration with a small number of parts.

FIG. 3 is a side view of a vehicle seat equipped with a locking device, in which (A) shows a locked state of the locking device, and (B) shows a state when the locking device is unlocked and the seat is flipped up. FIG. 2 is an exploded perspective view of the locking device of the first embodiment. It is a figure showing the lock state of the locking device of a 1st embodiment. FIG. 6 is a diagram showing a state in the middle of a lock release operation in the locking device of the first embodiment. FIG. 3 is a diagram showing an unlocked state of the locking device of the first embodiment. FIG. 3 is a diagram showing a state in which the locking device of the first embodiment has moved the pole to an overstroke position. It is a figure showing the principal part of the locking device of a 2nd embodiment.

Embodiments to which the present invention is applied will be described below with reference to the drawings. A vehicle seat 1 shown in FIG. 1 is a tumble seat that can be flipped up forward, and has a seat cushion 2 that is a seat surface portion and a seat back 3 that is a backrest portion. It is possible to tilt the seat back 3 back and forth with respect to the seat cushion 2 by a reclining device (not shown).

A front portion of the seat cushion 2 is rotatably supported via a hinge mechanism 4 with respect to a floor surface 5 of the vehicle. The rear part of the seat cushion 2 is supported by a floor surface 5 via a locking device 10. A striker 13 is fixed to the floor surface 5 side. In the locked state of the locking device 10 shown in FIG. 1(A), the locking device 10 holds the striker 13, and the flip-up of the vehicle seat 1 is restricted. As shown in FIG. 1(B), when the seat back 3 is tilted forward, the lock device 10 enters the unlocked state, releases the hold on the striker 13, and rotates the vehicle seat 1 via the hinge mechanism 4. You can flip it forward.

A locking device 10 according to a first embodiment will be described with reference to FIGS. 2 to 6. As shown in FIG. 2, the locking device 10 has a base plate 11 and a cover plate 12 fixed to the lower part of the seat cushion 2, and a hook 20, a pole 30, a pressing member 40 It is constructed by assembling the following.

Support holes 11a and 11b are formed in the base plate 11, and support holes 12a and 12b are formed in the cover plate 12. A shaft pin 14 is fixed to the support hole 11a and the support hole 12a, and a shaft pin 15 is fixed to the support hole 11b and the support hole 12b. A striker entry groove 12c into which a striker 13 fixed to the floor surface 5 can enter is formed in the cover plate 12.

A hook 20 is provided so as to be rotatable about the shaft pin 14. Among the rotating directions of the hook 20, the direction indicated by arrow S1 in FIG. 3 is defined as the striker release direction, and the direction indicated by arrow S2 is defined as the striker retraction direction.

The hook 20 has a shaft hole 21 that is pivotally supported by the shaft pin 14 and a striker holding groove 22 that can hold the striker 13 inside. A first arm 23 and a second arm 24 are provided on both sides of the striker holding groove 22. The hook 20 is further provided with a locking portion 25 and a spring hook portion 26 that protrude in a radial direction centered on the shaft hole 21 at different positions in the rotational direction from the first arm 23 and the second arm 24. ing.

The first arm 23 and the second arm 24 are cantilever-shaped protrusions extending along the striker holding groove 22, and the amount of protrusion from the innermost part of the striker holding groove 22 (length to the tip) is The first arm 23 is larger than the second arm 24. The first arm 23 is located on the striker retraction direction S2 side with respect to the striker holding groove 22, and the second arm 24 is located on the striker release direction S1 side with respect to the striker holding groove 22.

Near the tip of the first arm 23, an introduction surface 23a is formed that curves away from the second arm 24 as it advances toward the tip. Inside the striker holding groove 22 on the back side of the introduction surface 23a, the distance between the first arm 23 and the second arm 24 is approximately the same as the diameter of the striker 13.

The first arm 23 is further formed with pressed parts 23b and 23c. The pressed portion 23 b is located near the tip of the first arm 23 and is formed on the outer surface side opposite to the introduction surface 23 a facing the striker holding groove 22 . The pressed portion 23b is an inclined surface whose distance from the introduction surface 23a increases as it advances toward the base end of the first arm 23. The pressed portion 23c is formed on the outer surface side of the first arm 23 following the pressed portion 23b, and is an inclined surface inclined in the opposite direction to the pressed portion 23b.

The hook 20 is rotationally biased toward the striker release direction S1 by a hook bias spring 27. The hook biasing spring 27 is a tension spring, and one end is hung on the spring hook 26 of the hook 20, and the other end is hooked on the spring hook 12d of the cover plate 12.

A pawl 30 is provided so as to be rotatable about the shaft pin 15. Among the rotational directions of the pawl 30, the direction shown by arrow T1 in FIG. 3 is defined as the locking direction, and the direction shown by arrow T2 is defined as the locking direction.

The pole 30 has a shaft hole 31 that is pivotally supported by the shaft pin 15. Further, the pole 30 has a locking part 32 that projects from the periphery of the shaft hole 31 in different directions, a traction arm 33, and a linking part 34. The locking portion 32 and the linking portion 34 protrude in generally opposite directions across the shaft hole 31, and the amount of protrusion (length to the tip) of the locking portion 32 and the linking portion 34 from the shaft hole 31 is approximately equal. A transmission hole 33a is formed near the tip of the traction arm 33. Further, a spring hook portion 35 is provided that protrudes laterally from the location where the transmission hole 33a is formed.

The pawl 30 is rotationally biased in the locking direction T1 by a pawl biasing spring 36. The pole biasing spring 36 is a tension spring, and one end is hung on the spring hook 35 of the pole 30, and the other end is hooked on the spring hook 12d of the cover plate 12.

The operating member 37 (see FIG. 2) is inserted into the transmission hole 33a of the traction arm 33. A cable (not shown) is connected to the operating member 37. When the seat back 3 of the vehicle seat 1 is tilted forward (see FIG. 1), the cable is pulled and force is transmitted from the operating member 37 to the traction arm 33, and the pole 30 is moved against the biasing force of the pole bias spring 36. rotates in the unlocking direction T2.

A holding member 40 is provided so as to be rotatable about the shaft pin 15. In other words, the pole 30 and the pressing member 40 are coaxially supported. The rotational direction of the holding member 40, like the rotational direction of the pole 30, is expressed as a locking direction (direction shown by arrow T1 in FIG. 3) and a locking direction (direction shown by arrow T2 in FIG. 3).

The holding member 40 has a shaft hole 41 that is pivotally supported by the shaft pin 15. Further, the holding member 40 includes a holding part 42 that projects in different directions from the periphery of the shaft hole 41, a spring hook arm 43, and a linking part 44. The holding portion 42 and the linking portion 44 protrude in generally opposite directions with the shaft hole 41 interposed therebetween.

The holding member 40 is urged to rotate in the locking direction T1 by a holding member urging spring 45. The pressing member biasing spring 45 is a tension spring, and one end thereof is hung on the spring hanging arm 43 of the pressing member 40, and the other end is hung on the spring hanging portion 11c of the base plate 11.

As shown in FIG. 2, the pole 30 and the pressing member 40 are each plate-shaped members, and are arranged so as to overlap along the axis of the shaft pin 15. Note that the wall thickness of the pole 30 in the axial direction of the shaft pin 15 is greater than that of the holding member 40. The linking part 44 of the holding member 40 is bent in the middle, and the linking part 34 of the pole 30 and the linking part 44 (bent tip side part) of the holding member 40 are at the same position in the axial direction of the shaft pin 15. . Therefore, the pawl 30 and the pressing member 40 can cause the linking parts 34 and the linking parts 44 to come into contact with each other or to separate from each other according to changes in their mutual positional relationship in the rotational direction.

The operation of the lock device 10 having the above configuration will be explained. FIG. 3 shows the locking state of the locking device 10. In the locked state, the hook 20 is in a striker holding position where it holds the striker 13 that has entered the striker holding groove 22. At the striker holding position, the striker holding groove 22 of the hook 20 is oriented substantially perpendicular to the striker entry groove 12c of the cover plate 12, and the movement of the striker 13 toward the opening side of the striker entry groove 12c is controlled by the second arm 24. is regulated.

In the locked state of the locking device 10, the pole 30 is in the locked position. At the locked position of the pawl 30, the tip of the locking part 32 is located opposite to (close to) the side surface of the locking part 25 of the hook 20 in the striker release direction S1. The pawl 30 is held at the lock position by the biasing force of the pawl biasing spring 36 in the locking direction T1. Although the hook 20 is biased in the striker release direction S1 by the hook biasing spring 27, rotation in the striker release direction S1 is prevented by the locking portion 25 coming into contact with the locking portion 32. Therefore, the hook 20 maintains the striker holding position.

In the locked state of the locking device 10, the presser member 40 is further moved to a position where the presser portion 42 is pressed against the locking portion 25 of the hook 20 by the urging force of the presser member urging spring 45 in the locking direction T1 (the holding position). ). As shown in FIG. 3, there is a predetermined clearance between the locking portion 25 of the hook 20 and the locking portion 32 of the pole 30 in the locked state. Further, the locking device 10 does not include an elastic body (damper member) that the striker 13 and the hook 20 come into contact with in the locked state. However, due to the pressure of the pressing member 40, the hook 20 is stably held (fixed) at the striker holding position, and vibration and rattling between the striker 13 and the hook 20 can be prevented.

In the locked state, the pawl 30 restricts the rotation of the hook 20 in the striker release direction S1. Therefore, the pawl 30 is configured to have a large wall thickness and high rigidity so that the hook 20 can be reliably locked. On the other hand, the holding member 40 serves to supplementarily stabilize the hook 20 in the locked state, and has a smaller wall thickness than the pawl 30.

In the locked state of the locking device 10, when the reclining device of the vehicle seat 1 is unlocked and the seat back 3 is tilted forward (see FIG. 1(A)), a cable (not shown) is pulled. When the lock release operation force is transmitted to the operating member 37 (FIG. 2) via the towed cable, the pawl 30 moves against the shaft pin against the biasing force of the pawl biasing spring 36, as shown in FIG. 15 in the unlocking direction T2. Then, the locking portion 32 of the pawl 30 is removed from the rotation trajectory of the locking portion 25 of the hook 20, and the pawl 30 becomes the unlocked position in which the hook 20 is not locked.

When the pawl 30 rotates to the unlock position and the hook 20 is unlocked by the pawl 30, the hook 20, which is now rotatable in the striker release direction S1, rotates to the striker release position shown in FIG. The force for rotating the hook 20 to the striker release position is provided by the biasing force of the hook biasing spring 27, and the pawl 30 and the pressing member 40 further function to assist the rotation of the hook 20.

More specifically, in the locked state of the locking device 10 shown in FIG. is located, and the first arm 23 of the hook 20 is located on the unlocking direction T2 side. There is a gap (separated) between the linking part 34 of the pole 30 and the linking part 44 of the holding member 40, and there is a gap between the linking part 44 of the holding member 40 and the first arm 23 of the hook 20. There are (spaced apart).

In the locked state, the pawl 30 and the holding member 40 have the locking part 32 and the holding part 42 in contact with the hook 20, respectively, in the locking direction T1 (the urging direction of the pole urging spring 36, the pressing member urging spring Further rotation in the biasing direction of 45 is restricted. Therefore, in the locked state, the relationship in which the linking part 34 and the linking part 44 are spaced apart, and the relationship in which the linking part 44 and the pressed part 23b are spaced apart are maintained, respectively (see FIG. 3).

When the pawl 30 is rotated in the unlocking direction T2 from the locked state shown in FIG. 3 by operation via the operating member 37, the linking portion 34 approaches the linking portion 44. At the initial stage of the rotation of the pawl 30 in the unlocking direction T2, the pressing member 40 maintains the pressing position shown in FIG. 3 without receiving any rotational force from the pawl 30. Further, the locking portion 32 of the pole 30 maintains a state in which the locking portion 25 of the hook 20 can be locked, and the hook 20 continues to be held at the striker holding position.

After the pawl 30 independently rotates by a predetermined amount in the unlocking direction T2, the linking portion 34 of the pawl 30 comes into contact with the linking portion 44 of the pressing member 40. Then, the linking part 34 presses the linking part 44, and the rotational force of the pawl 30 in the unlocking direction T2 is transmitted to the pressing member 40. As a result, the holding member 40 resists the urging force of the holding member urging spring 45 and rotates together with the pawl 30 in the unlocking direction T2.

When the pawl 30 and the holding member 40 both rotate a predetermined amount in the unlocking direction T2, the linking part 44 of the holding member 40 comes into contact with the pressed part 23b of the hook 20, and the linking part 44 locks the pressed part 23b. Push in the release direction T2. The pressing force from this linking portion 44 to the pressed portion 23b acts as a force that rotates the hook 20 in the striker release direction S1.

FIG. 4 shows a state immediately after the locking portion 32 of the pole 30, which has rotated in the lock release direction T2 and reached the lock release position, is separated from the locking portion 25 of the hook 20. At this time, the holding member 40 has reached the holding release position corresponding to the unlocking position of the pole 30, and the holding part 42 is separated from the locking part 25 of the hook 20. In other words, this is a state in which the hook 20 can be locked by the pole 30 and a state immediately after the pressing of the hook 20 by the pressing member 40 is released. In the state shown in FIG. 4, the hook 20 is moved from the striker holding position toward the striker release direction S1 due to the pressing force from the pawl 30 and the pressing member 40 rotating in the unlocking direction T2 and the urging force from the hook urging spring 27. It is rotating slightly.

That is, at the time when the pawl 30 releases the locking of the hook 20, the pressing force from the pawl 30 and the pressing member 40 has already been transmitted to the hook 20. By setting the operation timing in this manner, the pressing force by the pawl 30 and the pressing member 40 can be assisted from the initial stage when the pawl 30 is unlocked and the hook 20 starts rotating to the striker holding position. can be done.

At the earliest stage of rotation of the hook 20 in the striker release direction S1 shown in FIG. 4, the linking portion 44 of the pressing member 40 is in contact with the pressed portion 23b of the first arm 23 of the hook 20. Then, when the hook 20 rotates in the striker release direction S1 and the positional relationship between the first arm 23 and the pressing member 40 changes, the object that the linking part 44 contacts changes to the pressed part 23c of the hook 20, A pushing force from the pole 30 and the pressing member 40 acts on the pressed portion 23c.

Note that, unlike this embodiment, when the linking part 44 of the pressing member 40 pushes the hook 20 and rotates it in the striker release direction S1, the linking part 44 pushes only the area of the pressed part 23b, and the pressed part 23c It may be configured such that the linking part 44 does not come into contact with the linking part 44 (at the stage where the pressed part 23c faces the linking part 44, the first arm 23 is separated from the linking part 44).

When the hook 20 further rotates in the striker release direction S1, the first arm 23 of the hook 20 separates from the linking portion 44 of the pressing member 40. Then, the hook 20 rotates to the striker release position shown in FIG. 5, the striker 13 separates from the striker holding groove 22, and the locking device 10 enters the unlocked state. As shown in FIG. 5, in the unlocked state, the respective side surfaces of the locking part 32 of the pole 30 and the pressing part 42 of the pressing member 40 are opposite to the tip of the locking part 25 of the hook 20, and Rotation of the pole 30 and the pressing member 40 in the stopping direction T1 is regulated by the hook 20.

The pawl 30 is rotatable to an overstroke position (FIG. 6), which is further advanced in the unlocking direction T2 from the unlocking position shown in FIGS. 4 and 5. The amount of traction by the cable and the operating member 37 is set so that the pawl 30 rotates to the overstroke position when the seat back 3 is tilted forward. Thereby, even if there is an error in the accuracy or assembly of parts, the pole 30 can be reliably moved to the unlocking position and unlocked.

When the lock device 10 is in the unlocked state shown in FIGS. 5 and 6, the vehicle seat 1 can be rotated and flipped forward via the hinge mechanism 4, as shown in FIG. 1(B).

When the vehicle seat 1 is returned from the state where it has been flipped forward and the rear portion of the seat provided with the locking device 10 approaches the floor surface 5, the striker 13 enters the striker entry groove 12c of the cover plate 12, and the hook 20 is introduced. It comes into contact with the surface 23a (see FIG. 5). The hook 20 pressed against the introduction surface 23a by the striker 13 rotates in the striker retraction direction S2 against the biasing force of the hook biasing spring 27.

When the hook 20 rotates by a predetermined amount in the striker retraction direction S2, the tip of the locking part 25 of the hook 20 no longer faces the respective sides of the locking part 32 of the pole 30 and the holding part 42 of the holding member 40, and the pole 30 Then, the holding member 40 becomes rotatable in the locking direction T1. When the hook 20 reaches the striker holding position shown in FIG. The locking device 10 enters the locking state described above.

As described above, in the locking device 10, when the hook 20 is rotated from the striker holding position to the striker releasing position in the unlocking operation, in addition to the urging force of the hook urging spring 27, the locking device 10 rotates in the locking release direction T2. A pressing force from the pole 30 and the pressing member 40 is applied to the hook 20. Thereby, even if the load acting on the lock device 10 is large, the hook 20 can be reliably moved to the striker release position and unlocked.

For example, the striker 13 is in a fixed position with respect to the floor surface 5 of the vehicle, and when the locking device 10 is unlocked, the rear part of the vehicle seat 1 including the locking device 10 is slightly lifted and the striker 13 is moved into the striker holding groove. Removed from 22. At this time, the weight of the rear portion of the vehicle seat 1 is applied to the hook 20, and it is necessary to rotate the hook 20 in the striker release direction S1 against the load. Then, the rotation of the hook 20 is assisted by the pushing force of the pawl 30 and the pressing member 40 that receive the lock release operation from the operating member 37, thereby lifting the rear part of the vehicle seat 1 while rotating the hook 20. Even a lock release operation can be performed reliably.

As described above, the locking device 10 is configured so that the pressing force applied to the hook 20 by the pawl 30 and the pressing member 40 is applied at the initial stage of the unlocking operation. In the lock release operation, the greatest force is required at the initial stage when the hook 20, which is stopped at the striker holding position, starts to rotate in the striker release direction S1, so assistance is provided by pressing the pawl 30 and the holding member 40 at this initial stage. This is extremely effective in achieving a smooth unlocking operation.

Note that the timing at which the hook 20 is pressed by the pole 30 and the pressing member 40 can be arbitrarily selected. For example, the setting of the final timing of pressing the hook 20 may be configured to press the hook 20 not only during the initial stage of rotation of the hook 20 in the striker release direction S1 but also over a longer period of time. .

On the other hand, it is desirable that the start time of pressing the hook 20 by the pole 30 and the pressing member 40 is not set too early. In the locked state where the hook 20 is held in the striker holding position by the pole 30 or the pressing member 40, even if the hook 20 is pressed in the striker release direction S1, the hook 20 cannot be rotated and is moved in the lock release direction T2. There is a possibility that the movement of the pole 30 and the pressing member 40 itself may be hindered. Therefore, the timing to start pressing the hook 20 is preferably set immediately before the pole 30 releases the hook 20, as in the present embodiment. Alternatively, the pressing of the hook 20 may be started at the same time as or after the hook 20 is released from the pawl 30.

The pole 30 and the holding member 40 are coaxially supported by the shaft pin 15. Therefore, the two members (pole 30 and pressing member 40) that sequentially transmit the pressing force to push the hook 20 when the lock is released are arranged with good space efficiency. Further, since the pole 30 and the holding member 40 are pivotally supported by the common shaft pin 15, the number of parts can be reduced.

In the locking device 10 described above, the amount of protrusion (length to the tip) of the locking portion 32 and the linking portion 34 from the shaft hole 31 of the pawl 30 is approximately equal. The amount of protrusion (length to the tip) of the linking part 44 of the holding member 40 from the shaft hole 41 is set to be approximately the same as that of the linking part 34 of the pole 30. As shown in FIGS. 3 to 6, the wall surface of the cover plate 12 is located near the tips of the linking parts 34 and 44, and the linking parts 34 and 44 interfere with the wall surface of the cover plate 12. By setting the amount of protrusion so that it does not, the size of the locking device 10 is reduced.

On the other hand, regarding the function of pushing the hook 20 when releasing the lock, the portion where force is transmitted from the pole 30 to the holding member 40 and the portion where force is transmitted from the holding member 40 to the hook 20 are supported by the shaft pin 15. The greater the distance from the rotation center, the more efficiently the hook 20 can be pushed in. A locking device 50 according to a second embodiment constructed with this point in mind is shown in FIG. In the locking device 50, the first arm 28 of the hook 20, the linking portion 38 of the pole 30, and the linking portion 46 of the pressing member 40 are different from each part of the locking device 10 described above, and the other parts are different from the locking device 10. have in common. In FIG. 7, illustrations other than the hook 20, the pole 30, and the pressing member 40 are omitted.

The linking portion 38 of the pawl 30 in the locking device 50 has a larger protrusion amount (length to the tip) from the shaft hole 31 than the locking portion 32 . The linking portion 46 of the holding member 40 has a larger protrusion amount (length to the tip) from the shaft hole 41 than the holding portion 42 . The first arm 28 of the hook 20 has a larger protrusion amount (length to the tip) from the innermost part of the striker holding groove 22 than the first arm 23 of the first embodiment. The introduction surface 28a and the pressed parts 28b and 28c in the first arm 28 have the same functions as the introduction surface 23a and the pressed parts 23b and 23c of the first embodiment.

During the unlocking operation of the locking device 50, a pressing force is transmitted from the linking part 38 of the pawl 30 rotating in the unlocking direction T2 to the linking part 46 of the pressing member 40, and from the linking part 46 the first arm 28 of the hook 20 ( The pressing force is transmitted to the pressed parts 28b, 28c). The state in FIG. 7 corresponds to the state in FIG. 4 of the locking device 10 of the first embodiment, in which the hook 20 receives the pressing force from the pawl 30 and the pressing member 40 and rotates in the striker release direction S1. It shows the initial stages of starting the process. Compared to the lock device 10 of the first embodiment, the position where the linking part 38 abuts the linking part 46 and the position where the linking part 46 abuts the pressed part 28b (28c) are different from those of the pawl 30 and the pressing member 40. It is away from the center of rotation (axis pin 15). As a result, the amount of pushing of the pawl 30 and the pressing member 40 into the hook 20 per unit rotation angle becomes large, and the effect of assisting the rotation of the hook 20 to the striker release position becomes high.

In the lock devices 10 and 50 of each of the above embodiments, when the lock is released, the linking part 34 (38) of the pawl 30 presses the linking part 44 (46) of the holding member 40, and the linking part 44 (46) of the holding member 40 is pressed. ) presses the pressed parts 23b, 23c (28b, 28c) of the hook 20. As a modification different from this, the linking part 44 (46) of the pressing member 40 presses the linking part 34 (38) of the pole 30, and the linking part 34 (38) of the pole 30 presses the pressed part 23b of the hook 20, It is also possible to operate in the order of pressing 23c (28b, 28c).

Specifically, in the direction of rotation around the shaft pin 15, the positions of the linking part 34 (38) of the pawl 30 and the linking part 44 (46) of the presser member 40 are swapped, and the linking part 34 (38) of the pawl 30 is rotated. ), the connecting portion 44 (46) of the holding member 40 is located on the locking direction T1 side, and the first arm 23 (26) of the hook 20 is located on the locking release direction T2 side. Further, the configuration is such that an operating force from an operating member corresponding to the operating member 37 of the embodiment described above is input to the pressing member 40.

In this manner, in the locking device of the present invention, either the pressing member 40 or the pawl 30 can be used as the member that applies a force to the hook 20 in the striker release direction S1 when the lock is released. That is, in the locking device of the present invention, when the pawl 30 moves (rotates) from the lock position to the unlock position to release the movement restriction on the hook 20, one of the pawl 30 and the pressing member 40 presses the other, The other of the pawl 30 and the pressing member 40 presses the hook 20 from the striker holding position to the striker release position.

In the illustrated locking device 10 (50), a coil spring (tension spring) is used as a biasing means for biasing the hook 20, the pole 30, the pressing member 40, etc., but a different biasing means may be used. For example, it is also possible to use a torsion spring as the biasing means.

In the illustrated lock device 10 (50), the pole 30 and the pressing member 40 are coaxially supported. As described above, this configuration has the advantage that parts can be arranged in a space-saving manner and the number of parts can be reduced. However, it is also possible to apply the present invention to a structure in which the pole and the holding member are supported at different axial positions.

Although the illustrated locking device 10 (50) is applied to the floor locking of the vehicle seat 1, the locking device of the present invention is not limited to the floor locking of the seat, and may be of a type having a hook and a pole. It can be widely applied to locking devices. For example, it can be applied to a locking device for back locking a seat, a locking device for locking an opening/closing body such as a bonnet or a trunk lid of a vehicle, and the like.

Furthermore, the embodiments of the present invention are not limited to the above-described embodiments and their modifications, and may be variously changed, replaced, and transformed without departing from the spirit of the technical idea of the present invention. Furthermore, if the technical idea of the present invention can be realized in a different manner due to advances in technology or other derived technologies, it may be implemented using that method. Accordingly, the claims cover all embodiments that may fall within the spirit of the invention.

1: Vehicle seat 10: Lock device 11: Base plate 12: Cover plate 13: Striker 14: Axis pin 15: Axis pin 20: Hook 22: Striker holding groove 23: First arm (arm portion)
23b: Pressed part 23c: Pressed part 24: Second arm (arm part)
25 : Locking part 27 : Hook biasing spring 28 : First arm (arm part)
28b: Pressed part 28c: Pressed part 30: Pole 32: Locking part 34: Linking part 36: Pole biasing spring 37: Operating member 38: Linking part 40: Pressing member 42: Holding part 44: Linking part 45: Holding member biasing spring 46: Interlocking portion 50: Locking device

Claims (3)

a hook operable between a striker holding position for holding a striker and a striker release position for releasing the striker;
a pole operable between a lock position that restricts movement of the hook from the striker holding position to the striker release position and an unlock position that allows movement of the hook from the striker holding position to the striker release position;
a pressing member that holds the hook in the striker holding position when the pole is in the locking position;
Equipped with
When the pole moves from the lock position to the unlock position, one of the pole and the pressing member presses the other, and the other presses the hook from the striker holding position to the striker release position. ,
The locking device is characterized in that the pawl and the pressing member are rotatably supported coaxially . The said pole is
a locking portion that locks the hook in the striker holding position at the lock position;
a linking portion that contacts the pressing member and transmits force when rotating from the locked position to the unlocked position,
The locking device according to claim 1, wherein the amount of protrusion of the linking portion is greater than the amount of protrusion of the locking portion from the center of rotation of the pawl. The hook has a striker holding groove into which the striker enters at the striker holding position, and a pair of arm portions located on both sides of the striker holding groove,
3. The locking device according to claim 1, further comprising a pressed portion on an outer surface of one of the pair of arm portions, which receives the pressing force from the pressing member.

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