WO2011052540A1

WO2011052540A1 - Locking device

Info

Publication number: WO2011052540A1
Application number: PCT/JP2010/068859
Authority: WO
Inventors: 勢人暮林
Original assignee: シロキ工業株式会社
Priority date: 2009-10-28
Filing date: 2010-10-25
Publication date: 2011-05-05
Also published as: JP2011094346A; JP5449981B2

Abstract

Disclosed is a locking device provided with a hook capable of being rotated to a locking position where a striker is held, a release position where the striker is released, and an over-stroke position which is located beyond the locking position; and a ratchet capable of being rotated to an anchor position wherein the hook is held in the locking position and an anchor release position wherefrom the hook is allowed to rotate to the release position. The locking device is also provided with an electric rotation control means for controlling the rotation of the hook and ratchet by driving a motor. When the hook and the ratchet are transitioning from an anchor release state to an anchor state, the electric rotation control means simultaneously holds the hook and the ratchet in the over-stroke position and the anchor release position, then causes the ratchet to rotate to the anchoring position, with the hook held in the over-stroke position, and subsequently causes the hook to rotate to the locking position. By means of the locking device, it is possible to mitigate the collision between the hook and the ratchet during locking operation, thereby improving quietness.

Description

Locking device

The present invention relates to a locking device that performs locking and unlocking by holding and releasing a striker.

This type of locking device includes a hook that can be rotated to a lock position for holding a striker and a release position for releasing the striker, and a ratchet that can be rotated to a locking position and a locking release position with respect to the hook, A structure in which the ratchets are biased toward each other (a release position for hooks and a locking position for ratchets) is common.

JP 2005-299319 A

When locking, the hook and ratchet are forced to approach each other by vigorous force and collide with each other, causing impact and abnormal noise. As a countermeasure, it is known to dispose a shock-absorbing material at the engagement portion between the hook and the ratchet, but a more fundamental countermeasure has been desired.

A locking device having a so-called auto-closure function in which a hooker is rotated to a lock position by electric to perform a striker retracting operation is known as a device that can suppress the momentum of the hook rotation. However, the auto-closure in the conventional locking device can control the rotation of the hook to the lock position, but when the hook and the ratchet are engaged at the final stage of the locking operation as described above, It did not meet the demand for moderation between the ratchets.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a locking device having excellent quietness during a locking operation.

The lock device according to the present invention is a hook that is rotatable to a lock position that holds the striker, a release position that releases the striker, and an overstroke position that advances from the lock position in a direction opposite to the release position; A locking position that engages with the hook and restricts rotation in the release direction; a ratchet that can rotate to a locking release position that releases the engagement; and rotation of the hook and ratchet by driving the motor And when the hook and ratchet transition from the disengaged state to the engaged state, the hook and ratchet are simultaneously held in the overstroke position and the unlocked position, respectively, and then the hook is held in the overstroke position. And an electric rotation control means for rotating the ratchet to the locking position and then rotating the hook to the locking position. That. The hook overstroke position means the escape position of the hook necessary for the mechanism to engage and release the ratchet with the hook, and the amount of rotation from the lock position does not matter. . For example, even if there is a slight change in the rotation position that can be regarded as a lock position based on the overall rotation amount of the hook, if the ratchet can be engaged and disengaged by the change in position, the overstroke Position.

When the hook and the ratchet transition from the engaged state to the disengaged state, the electric rotation control means rotates the hook from the lock position to the overstroke position, and holds the hook at the overstroke position. It is preferable to rotate from the locking position to the locking release position. Furthermore, when a half-lock position that can be engaged with the ratchet in the locking position is set between the lock position and the release position in the hook, and the hook is turned to the release position after the hook and the ratchet are disengaged, The electric rotation control means is preferably configured to rotate the hook by motor driving to the release position and hold the ratchet at the unlocked position until the hook passes at least the half-lock position.

The electric rotation control means can be constituted by a rotating body that is rotationally driven by a motor, and a hook and a ratchet contacting portion provided on the rotating body so as to be eccentric from the rotation center.

More specifically, the hook contact portion or the ratchet contact portion is formed as a protruding member protruding from the rotating body, and the protruding member is contacted with the hook or ratchet. As one aspect of this contact relationship, a pressed surface that is pressed against the projecting member by rotation of the rotating body is formed on the outer surface of the hook or ratchet, and the hook or ratchet is placed in a direction to contact the pressed surface with the projecting member. A rotationally biased configuration is possible.

According to the present invention described above, it is possible to appropriately control the operation of the hook and ratchet during the locking operation by the electric rotation control means, and to obtain a locking device with excellent quietness.

It is a figure which shows the full lock state of the locking device of 1st Embodiment to which this invention is applied. It is a figure which shows the state which the motor was driven to the unlocking direction from the full lock state of FIG. 1, and the hook control pin contact | abutted to the hook. FIG. 3 is a diagram illustrating a state in which the hook is rotated to an overstroke position and the ratchet control pin is in contact with the ratchet by driving the motor in the unlocking direction from the state of FIG. 2. It is a figure which shows the overstroke state by which the hook and ratchet were hold | maintained at the overstroke position and the latch release position by the motor drive to the unlocking direction from the state of FIG. FIG. 5 is a view showing a state in which the hook is rotated to the half-lock position while the ratchet is held in the unlocking position by driving the motor in the unlocking direction from the state of FIG. 4. It is a figure which shows the state by which the hook was rotated to the release position of the striker by the motor drive to the lock release direction from the state of FIG. FIG. 7 is a diagram showing a state where the motor is further driven in the unlocking direction from the state of FIG. 6 and the striker release operation (unlock operation) is completed. It is a figure which shows the half lock state which the hook rotated from the release position to the half lock position by the striker from the state of FIG. 7, and was engaged with the ratchet. FIG. 9 is a diagram illustrating a state in which the position of the ratchet control pin is changed from one end portion to the other end portion in the arc groove of the driven gear when the motor is driven in the lock direction from the half lock state of FIG. 8. FIG. 10 is a diagram illustrating a state in which the hook control pin and the ratchet control pin are in contact with the hook and the ratchet, respectively, by driving the motor in the locking direction from the state of FIG. 9. It is a figure which shows the state by which the hook was rotated to the full lock position by the motor drive to the locking direction from the state of FIG. 10, and the ratchet was rotated to the latch release position. It is a figure which shows the overstroke state by which the hook was rotated to the overstroke position by the motor drive to the locking direction from the state of FIG. 11, and the ratchet was hold | maintained at the latch release position. FIG. 13 is a view showing a state immediately after the ratchet is rotated to the locking position and the hook is returned to the full lock position by the motor driving in the locking direction from the state of FIG. It is a figure which shows the full lock state of the locking device of 2nd Embodiment. It is a figure which shows the overstroke state of the locking device of 2nd Embodiment. It is a figure which shows the full lock state of the locking device of 3rd Embodiment. It is a figure which shows the overstroke state of the locking device of 3rd Embodiment.

With reference to FIGS. 1 to 13, a lock device 10 according to a first embodiment of the present invention will be described. The application field of the present invention is not particularly limited, but a case where the present invention is applied as an automobile door locking device will be described as an example.

The locking device 10 has a hook 12 and a ratchet 13 supported on a base plate 11 that is only partially shown in the drawing so as to be rotatable about

parallel axes

12x and 13x, respectively. The base plate 11 is formed with a striker entry groove 11a that is located between the shaft 12x and the shaft 13x and into which the striker 14 can enter. One end of the striker entry groove 11a is opened at the edge of the base plate 11, and the striker 14 can be inserted and removed through this opening. A base plate 11 (hook 12 and ratchet 13) is provided on one of the body and door of the automobile, and a striker 14 is provided on the other.

The hook 12 includes a striker holding recess 12a that is opened in the outer diameter direction centered on the shaft 12x, a full lock step 12b that is formed in the vicinity of the opening of the striker holding recess 12a, and the full lock step 12b. A half-lock step 12c formed with different circumferential positions, a ratchet holding projection 12d formed adjacent to the half-lock step 12c, and a rotation control arm 12e extending long in the outer diameter direction; And a release stopper portion 12f. The full-lock step portion 12b and the half-lock step portion 12c have substantially the same radial distance from the shaft 12x.

The hook 12 has a release position (FIGS. 6 and 7) where the striker holding recess 12a is overlapped with the striker insertion / removal opening of the striker entry groove 11a to allow the striker 14 to be detached, and a striker holding recess 12a at the back of the striker entry groove 11a Can be rotated to a full lock position (lock position, FIG. 1, FIG. 2, FIG. 11, FIG. 13) that regulates the removal of the striker 14. The hook 12 has a half lock position (FIGS. 5, 8 to 10) between the release position and the full lock position. Further, the hook 12 can be rotated from the full lock position to an overstroke position (FIGS. 3, 4, and 12) slightly advanced in the direction opposite to the release position (counterclockwise). The hook 12 is urged to rotate in the direction of the release position by a tension spring 15 (conceptually shown in FIG. 1) stretched between the hook 12 and the release stopper portion 12f on the standing wall portion 11b of the base plate 11. By abutting, the rotation end (that is, the release position) in the urging direction is determined.

The ratchet 13 includes an engagement claw 13a that can be engaged with the full lock step 12b and the half lock step 12c of the hook 12, and an arcuate sliding contact surface 13b formed between the engagement claw 13a and the shaft 13x. The rotation control arm 13c extends longer in the outer diameter direction than the engaging claw 13a. The ratchet 13 has a locking position (FIGS. 1, 2, and 3) for positioning the engaging claw 13a on the movement locus (rotation locus about the shaft 12x) of the full lock step portion 12b and the half lock step portion 12c. 8 to 10, and 13), and an unlocking position for retracting the engaging claw 13a from the movement locus of the full lock step 12b and the half lock step 12c (FIGS. 4 to 7, 11, and FIG. 12). The ratchet 13 is urged to rotate in the locking position direction by a tension spring 15 (FIG. 1) stretched between the ratchet 12 and when the ratchet 13 is in the locking position, the engaging claw 13a is fully engaged. The hook 12 is held at the full lock position by engaging with the lock step portion 12b, and the hook 12 is held at the half lock position by engaging the engaging claw 13a with the half lock step portion 12c. The overstroke position of the hook 12 is determined when the engagement claw 13a of the ratchet 13 is engaged with the full lock step 12b and when the engagement between the full lock step 12b and the engagement claw 13a is released. This is the escape position required for the mechanism. If the rotation end of the hook 12 in the lock direction is at the full lock position (no overstroke), interference occurs between the hook 12 and the ratchet 13, but the hook 12 is positioned at the overstroke position. Thus, the ratchet 13 can be swung between the unlocking position and the locking position without causing interference. The overstroke position may have a very small position change from the full lock position.

The lock device 10 includes an electric rotation control mechanism 20. The electric rotation control mechanism 20 includes a motor pinion 21 that is rotationally driven by a motor M, and a driven gear (rotating body) 22 that has a gear meshing with the motor pinion 21 on the outer periphery and is rotationally driven about a shaft 22x. . On the driven gear 22, a hook control pin (hook contact portion, projection member) 23 and a ratchet control pin (ratchet contact portion, projection member) 24 are provided at a position eccentric with respect to the shaft 22 x. The hook control pin 23 is fixedly supported on the driven gear 22, and the ratchet control pin 24 is supported so as to be slidable with respect to the arc groove 22 a formed in the circumferential direction around the shaft 22 x. The position of FIGS. 1 to 8 where the ratchet control pin 24 is in contact with one end of the arc groove 22a is hereinafter referred to as an open operation position, and is in contact with the other end of the arc groove 22a. The position 12 is hereinafter referred to as the closing operation position.

The hook control pin 23 can come into contact with a hook rotation control surface (pressed surface) F formed on the outer surface (side surface) of the rotation control arm 12e according to the rotation of the driven gear 22. On the hook rotation control surface F, a convex cam surface portion F1 located on the distal end side of the rotation control arm 12e and a concave cam surface portion F2 located closer to the shaft 12x than the convex cam surface portion F1 are continuously formed. Has been. The ratchet control pin 24 can abut on a ratchet rotation control surface (pressed surface) R formed on the rotation control arm 13 c according to the rotation of the driven gear 22. The ratchet rotation control surface R includes a first concave cam surface portion R1 positioned on the distal end side of the rotation control arm 13c, and a second concave cam surface portion R2 positioned closer to the shaft 13x than the first concave cam surface portion R1. Further, a flat surface portion R3 located near the shaft 13x is formed. The second concave cam surface portion R2 is a surface that substantially coincides with the circumferential direction around the shaft 22x when the ratchet 13 is in the unlocking position.

The lock device 10 also includes switch means (not shown) that detects the positions of the hook 12 and the ratchet 13 and sends a drive signal to the electric rotation control mechanism 20.

The operation of the lock device 10 having the above structure will be described. First, the unlocking (door opening) operation will be described. FIG. 1 shows a fully-locked state in which the door is fully closed. The hook 12 is in the fully-locked position. The striker 14 is held in the striker holding recess 12a, and the striker 14 is placed in the back of the striker entry groove 11a. It is located. The ratchet 13 is in the locking position, and the hook 12 is held in the full lock position by engaging the engaging claw 13a with the full lock step portion 12b (the rotation to the release position is restricted). . The hook control pin 23 is separated from the rotation control arm 12e of the hook 12, and the ratchet control pin 24 is in an open operation position in the arc groove 22a and is separated from the rotation control arm 13c of the ratchet 13. Each of the hook 12 and the ratchet 13 maintains the full lock state by the biasing force of the tension spring 15.

When a lock release (door open) signal is input from this full lock state, the electric rotation control mechanism 20 drives the motor M in the lock release (open) direction, and the driven gear 22 is counterclockwise via the motor pinion 21. Rotate to. Hereinafter, the rotational direction of the driven gear 22 is referred to as an unlocking direction (indicated by an arrow T1 in FIGS. 1 to 6). When the driven gear 22 rotates in the unlocking direction, the hook control pin 23 comes into contact with the convex cam surface portion F1 of the rotation control arm 12e (FIG. 2), and the hook 12 pressed by the hook control pin 23 causes the tension spring 15 to move. Against this urging force, it is rotated to an overstroke position slightly advanced counterclockwise from the full lock position of FIG. 1 (FIG. 3). Here, the ratchet control pin 24 comes into contact with the flat surface portion R3 of the rotation control arm 13c. Further, the driven gear 22 continues to rotate in the unlocking direction, and the ratchet control pin 24 presses the flat surface portion R3 of the rotation control arm 13c, so that the ratchet 13 rotates to the unlocking position against the urging force of the tension spring 15. Moved (FIG. 4). This state is called an overstroke state. In the overstroke state, the ratchet control pin 24 is in contact with the vicinity of the boundary between the second concave cam surface portion R2 and the flat surface portion R3 on the ratchet rotation control surface R. At this time, the hook 12 is held at the overstroke position against the urging force of the tension spring 15 due to the contact relationship between the hook control pin 23 and the hook rotation control surface F of the rotation control arm 12e. In this way, the hook 12 and the ratchet 13 are disengaged from the full lock state by the driving force of the motor M. In the overstroke state of FIG. The pin 23 is held at the overstroke position, the ratchet 13 is held at the unlocking position by the ratchet control pin 24, and the rotation in the direction approaching each other is restricted by the electric rotation control mechanism 20.

When the rotation of the driven gear 22 in the unlocking direction is continued from the overstroke state (after the engagement of the hook 12 and the ratchet 13 is released) in FIG. 4, the hook control pin 23 gradually moves toward the ratchet 13 as shown in FIG. The hook 12 is rotated toward the release position while the concave cam surface portion F2 of the rotation control arm 12e is brought into contact (sliding contact) with the hook control pin 23. The position of the hook 12 in FIG. 5 corresponds to a half-lock position at the time of a locking operation (door closing) described later, but until the hook 12 passes the half-lock position in FIG. 5 from the overstroke position in FIG. The ratchet 13 continues to be held at the unlocked position by the electric rotation control mechanism 20. Specifically, during this time, the ratchet control pin 24 slides on the second concave cam surface portion R2 of the rotation control arm 13c according to the rotation of the driven gear 22, but the second concave cam surface portion R2 is centered on the shaft 22x. Since it has an arc shape, even if the position of the ratchet control pin 24 changes as the driven gear 22 rotates, the angle of the ratchet 13 does not change.

When the driven gear 22 continues to rotate in the unlocking direction from the state of FIG. 5, the ratchet control pin 24 moves away from the rotation control arm 13c to release the pressure on the ratchet rotation control surface R, but instead the ratchet of the hook 12 The holding projection 12d abuts on the arcuate sliding contact surface 13b and restricts the rotation of the ratchet 13 to the locking position (see FIG. 6). As can be seen from FIG. 5, the ratchet holding projection 12d and the arcuate sliding contact surface 13b are close to each other immediately before the ratchet control pin 24 is separated from the rotation control arm 13c. Even if the ratchet holding projection 12d and the arcuate sliding contact surface 13b are brought into contact with each other, almost no impact or abnormal noise is generated. When the driven gear 22 is further rotated in the unlocking direction from the state of FIG. 6, the hook 12 reaches the release position shown in FIG. 6 while being subjected to position control by the hook control pin 23.

In the state of FIG. 6, the striker 14 can be detached from the striker entry groove 11a, and when the driven gear 22 is rotated to the position of FIG. 7 where the hook control pin 23 is separated from the rotation control arm 12e, the drive of the motor M is stopped. The unlocking (opening) operation is completed. At this time, the hook 12 is held at a release position in which the release stopper portion 12f is brought into contact with the standing wall portion 11b by the biasing force of the tension spring 15, and the ratchet 13 is arcuately formed with the ratchet holding projection 12d by the biasing force of the tension spring 15. The sliding contact surface 13b is held in a contacted state (locking release position).

As described above, in the unlocking operation of the locking device 10, the hook 12 always controls the hook of the electric rotation control mechanism 20 until the hook 12 reaches the release position (FIG. 6) from the rotation to the overstroke position (FIG. 3). Since the rotation position is controlled by the pin 23 and is rotated by an amount corresponding to the driving amount of the motor M, the striker 14 is not released with great force by the urging force of the tension spring 15. Therefore, it is possible to perform a high-quality unlocking operation that does not cause an impact or abnormal noise. In particular, when an electric door opener that performs a door opening operation by an electric drive mechanism using a drive source such as a motor is provided, the operation and the release operation of the striker 14 can be smoothly linked. Further, the ratchet 13 is engaged by the ratchet control pin 24 of the electric rotation control mechanism 20 from the rotation of the hook 12 to the unlocking position (FIG. 3) until the hook 12 exceeds the half-lock position (FIG. 5). Since it is held at the stop release position, the rotation of the hook 12 is not hindered. Further, until the hook 12 reaches the release position from the half-lock position, the ratchet holding projection 12d is in sliding contact with the arcuate sliding contact surface 13b, and the ratchet 13 continues to be held on the unlocking position side. Therefore, in the unlocking operation, the hook 12 and the ratchet 13 do not collide with a strong force due to the urging force of the tension spring 15, and the occurrence of impact and noise can be suppressed even in the relationship between the hook 12 and the ratchet 13.

Next, the locking (door closing) operation will be described. When the striker 14 enters the striker entry groove 11a and the striker holding recess 12a in accordance with the door closing operation from the unlocked (door open) state of FIG. 7, the hook 12 is pressed as shown in FIG. Rotates to the half-lock position. At this stage, since the ratchet 13 is not subjected to position control by the ratchet control pin 24, the ratchet 13 is rotated to the locking position by the urging force of the tension spring 15, and the engaging claw 13a is engaged with the half lock step portion 12c. It will be in the half lock state. By turning the ratchet 13 to the locking position, the half lock switch is turned on in the switch means. In FIG. 8, the rotation control arm 13c and the hook control pin 23 appear to overlap each other, but the rotation control arm 13c has a shape offset to the front side of the paper surface, and the rotation control arm 13c is hook-controlled. Does not interfere with pin 23.

When the half-lock switch is turned on in the half-lock state of FIG. 8, the motor M is driven in the lock (closed) direction, and the driven gear 22 rotates in the clockwise direction via the motor pinion 21. Hereinafter, the rotation direction of the driven gear 22 is referred to as a lock direction (indicated by an arrow T2 in FIGS. 8 to 13). When the driven gear 22 rotates in the locking direction, the hook control pin 23 fixedly provided on the driven gear 22 rotates integrally with the driven gear 22, but the ratchet control pin 24 is located in the arc groove 22a as shown in FIG. Is changed from the open operation position to the close operation position. In other words, from FIG. 8 to FIG. 9, the position of the ratchet control pin 24 with respect to the base plate 11 does not change, and only the hook control pin 23 is moved in the rotation direction about the axis 22x.

If the driven gear 22 continues to rotate in the locking direction from the state of FIG. 9 in which the ratchet control pin 24 has been moved to the closed operation position within the arc groove 22a, the hook control pin 23 is moved to the hook of the rotation control arm 12e as shown in FIG. The ratchet control pin 24 comes into contact with the rotation control surface R (first concave cam surface portion R1) of the rotation control arm 13c. If the driven gear 22 continues to rotate from this state in the locking direction, the hook 12 is pressed against the hook control pin 23 by the concave cam surface portion F2 of the rotation control arm 12e as shown in FIG. Against this, it is rotated from the half-lock position to the full-lock position. On the other hand, the ratchet 13 is rotated from the locking position toward the locking release position by the first concave cam surface portion R1 of the rotation control arm 13c being pressed by the ratchet control pin 24. Eventually, as shown in FIG. 11, the contact position of the ratchet control pin 24 with respect to the rotation control arm 13c changes from the first concave cam surface portion R1 on the ratchet rotation control surface R to the second concave cam surface portion R2. In this state, the ratchet 13 is held at the unlocking position.

The driven gear 22 is not stopped at the position shown in FIG. 11 and is further rotated in the locking direction. As shown in FIG. 12, the convex cam surface portion F1 of the rotation control arm 12e is pressed by the hook control pin 23 to overhang the hook 12. Rotate to stroke position. In the lock direction rotation of the driven gear 22 from FIGS. 11 to 12, the ratchet control pin 24 is in sliding contact with the second concave cam surface portion R2 on the rotation control arm 13c, so that the ratchet 13 is held in the unlocked position. Continue to be. Thereby, it will be in the overstroke state which can engage the full-lock step part 12b of the hook 12, and the engaging claw 13a of the ratchet 13. FIG. Similarly to the unlocking described above, even when locked, in the overstroke state, the hook 12 is held in the overstroke position by the hook control pin 23, and the ratchet 13 is held in the unlocking position by the ratchet control pin 24, and The rotation in the approaching direction is restricted.

In order to engage the hook 12 and the ratchet 13, the driven gear 22 is further rotated in the locking direction from the overlock state of FIG. In the overstroke state, the ratchet control pin 24 is in contact with the terminal end of the second concave cam surface portion R2 (boundary portion with the flat surface portion R3), and when the driven gear 22 is rotated in the locking direction, the ratchet 13 While changing the contact position on the rotation control arm 13c with respect to the control pin 24 from the second concave cam surface portion R2 to the flat surface portion R3, the urging force of the tension spring 15 follows the movement of the ratchet control pin 24 to release the lock. It is rotated from the position to the locking position. The hook 12 is held at the overstroke position by the contact of the convex cam surface portion F1 with the hook control pin 23 during the rotation of the ratchet 13 to the locking position, and when the ratchet 13 reaches the locking position, Following the movement of the hook control pin 23 by the urging force of the tension spring 15 (while being position-controlled by the contact of the hook control pin 23 and the convex cam surface portion F1), it is rotated from the overstroke position to the full lock position. Then, as shown in FIG. 13, the full lock step portion 12 b of the hook 12 and the engagement claw 13 a of the ratchet 13 are engaged to be in a full lock state. The driven gear 22 is further rotated in the locking direction, and when the position reaches the position shown in FIG. 1, the driving of the motor M is stopped and the locking operation by the electric rotation control mechanism 20 is completed.

In the locking operation of the locking device 10 described above, the positions of the hook 12 and the ratchet 13 are both controlled by the hook control pin 23 and the ratchet control pin 24 of the electric rotation control mechanism 20, and after the half lock state, the full lock state is finally reached. Thus, the hook 12 and the ratchet 13 are kept separated from each other against the urging force of the tension spring 15 until the engaging claw 13a engages with the full lock step 12b (FIG. 13). Then, when the overstroke state of FIG. 12 is changed to the full lock state of FIG. 13, both the hook 12 and the ratchet 13 are controlled by the hook control pin 23 and the ratchet control pin 24 and the drive amount of the motor M is increased. Accordingly, the hook 12 and the ratchet 13 do not collide with a strong force due to the urging force of the tension spring 15 because it is rotated in the approaching direction (engagement direction). Therefore, in the locking device 10, similarly to the above-described unlocking operation, it is possible to suppress the occurrence of impacts and noises during the locking operation and to perform an operation with a high-class feeling.

14 and 15 show a locking device 110 according to a second embodiment of the present invention. Elements in the locking device 110 that are common to the locking device 10 of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the electric rotation control mechanism 20 of the first embodiment, the hook control pin 23 and the ratchet control pin 24 are supported on one driven gear 22 and the timing of pressing and rotating the hook 12 and the ratchet 13 is adjusted. The ratchet control pin 24 is slidable along the arc groove 22a. Instead, the electric rotation control mechanism 20 of the locking device 110 according to the second embodiment includes two driven gears (rotating bodies) 122A and 122B in meshing relation, and one driven gear 122A has a hook control pin (hook). (Contact portion, projection member) 123 is provided, and a ratchet control pin (ratchet contact portion, projection member) 124 is provided on the other driven gear 122B. The hook control pin 123 and the ratchet control pin 124 are provided at positions eccentric from the rotation center shafts 122A-x and 122B-x of the driven

gears

122A and 122B. The driven gears 122 </ b> A and 122 </ b> B are rotated by the driving force of the common motor M, but have different gear ratios, thereby adjusting the timing of pressing and rotating the hook 12 and the ratchet 13 by the hook control pin 123 and the ratchet control pin 124. . Further, the rotation control arm 13c of the ratchet 13 does not have a portion corresponding to the first concave cam surface portion R1 of the previous embodiment.

When performing the unlocking operation from the fully locked state shown in FIG. 14, the driven gear 122A is rotated counterclockwise (unlocked direction) by the motor M, and the driven gear 122B is rotated clockwise (unlocked direction). By the rotation of the driven gear 122A in the unlocking direction by the motor M, the hook control pin 123 presses the convex cam surface portion F1 of the hook rotation control surface F to rotate the hook 12 from the full lock position to the overstroke position. Further, by the rotation of the driven gear 122B in the unlocking direction, the ratchet control pin 124 presses the second concave cam surface portion R2 of the ratchet rotation control surface R to rotate the ratchet 13 from the locking position to the locking release position. . As a result, the overstroke state of FIG. 15 is achieved. Since the subsequent unlocking operation is the same as in the first embodiment, the illustration is omitted. However, when the driven gear 122A and the driven gear 122B continue to rotate in the unlocking direction, the hook control pin 123 moves the convex cam on the hook rotation control surface F. The pressing is performed from the surface portion F1 to the concave cam surface portion F2, and the hook 12 is rotated to the release position where the striker 14 is released. The ratchet control pin 124 maintains the pressure on the second concave cam surface portion R2 of the ratchet rotation control surface R until the hook 12 exceeds the half-lock position (holds the ratchet 13 at the unlocking position). Exceeds the half-lock position, the ratchet control pin 124 moves away from the rotation control arm 13c and the arcuate sliding contact surface 13b contacts the ratchet holding projection 12d.

In the locking operation by the locking device 110, when the half-lock state is established, the driven gear 122A is rotated clockwise (locking direction) by the motor M, and the driven gear 122B is rotated counterclockwise (locking direction). Here, the contact position of the ratchet control pin 124 when the ratchet control pin 124 is pressed and rotated from the locked position to the unlocked position by the ratchet control pin 124 is the flat surface portion R3 on the rotation control arm 13c. However, the other operations are the same as those in the first embodiment. When the driven

gears

122A and 122B continue to rotate in the lock direction, the overstroke state shown in FIG. 15 is reached, and then the full lock state shown in FIG. 14 is reached.

16 and 17 show a locking device 210 according to a third embodiment of the present invention. Elements in the locking device 210 that are common to the locking device 10 of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the lock device 210, a rotation control groove 30 for inserting a hook control pin (hook contact portion, projecting member) 223 is formed on the rotation control arm 212 e of the hook 12. This is different from the first embodiment in that the rotation of the hook 12 is controlled by the sliding contact relationship between the hook rotation control surface F ′ formed as the inner surface of the hook and the hook control pin 223. The position of the hook 12 is always controlled by the hook control pin 223 without being subjected to the rotation bias by the tension spring 15.

When the unlocking operation from the full lock state shown in FIG. 16 is performed in the lock device 210, when the driven gear 22 is rotated counterclockwise (unlock direction) by the motor M, the hook control pin 223 is centered on the shaft 22x. It moves in the rotation control groove 30 while being displaced in the rotation direction, and the hook 12 is rotated to the overstroke position in FIG. 17 by the sliding contact relationship with the hook rotation control surface F ′. Although the illustration of the subsequent states is omitted, when the driven gear 22 further rotates in the unlocking direction, the hook 12 becomes the striker 14 due to the relationship between the hook control pin 223 and the rotation control groove 30 (hook rotation control surface F ′). It is rotated to the release position that releases The operation of the ratchet 13 is controlled by the same structure as that of the first embodiment. When the ratchet 13 is rotated to the unlocking position with the hook 12 in the overstroke state of FIG. 17, the hook 12 is engaged until the hook 12 reaches the release position. It does not return to the stop position.

Conversely, when the lock device 210 is locked, when the hook 12 is rotated from the release position to the half-lock position by the entry of the striker 14, the driven gear 22 is rotated clockwise (lock direction) by the motor M, and the hook control pin The hook 12 is rotated toward the full lock position by the relationship between the H.223 and the rotation control groove 30 (hook rotation control surface F ′). Then, due to the relationship between the hook control pin 223 and the rotation control groove 30 (hook rotation control surface F ′), the hook 12 is rotated to the overstroke position of FIG. 17 and then returned to the full lock position of FIG. Thus, the ratchet 13 is engaged.

In the lock device 210 according to the third embodiment, as described above, the position of the hook 12 can be controlled without applying an urging force by the tension spring 15 or the like. It is also possible to control the rotation of the ratchet 13 by forming a groove similar to the rotation control groove 30 of the hook 12. In this case, the biasing means such as a tension spring can be omitted also on the ratchet 13 side. Further, in the lock device 210, the hook control pin 223 and the ratchet control pin 24 are provided on the common driven gear 22, but these rotate around different axes as in the lock device 110 of the second embodiment. You may make it support on a separate rotary body.

According to the second and third embodiments described above, it is possible to obtain an effect of preventing sudden rotation of the hook 12 at the time of unlocking and preventing an impact and noise due to a collision between the hook 12 and the ratchet 13 at the time of locking.

As described above in detail, the present invention relates to a locking device that holds a striker by engagement of a hook and a ratchet. During the locking operation, the hook and the ratchet are associated with an overstroke position by an electric rotation control means. At the same time, the ratchet is turned to the locking position while the hook is held at the overstroke position, and then the hook is turned to the lock position. As a result, it is possible to mitigate the collision between the hook and the ratchet during the locking operation and suppress the generation of abnormal noise. The present invention can be used for all locking devices, but as an example, the present invention is suitable for a door locking device for a vehicle that requires quietness.

10 110 210 Lock device 11 Base plate 12 Hook 12b Full lock step portion 12c Half lock step portion 12d Ratchet holding projection 12e Rotation control arm 13 Ratchet 13a Engaging claw 13b Arc-shaped sliding contact surface 13c Rotation control arm 14 Strike 15 Tension spring 20 Electric rotation control mechanism 21 Motor pinion 22 122A 122B Driven gear (rotating body)
22a Arc groove 23 123 223 Hook control pin (hook contact portion, projection member)
24 124 Ratchet control pin (Ratchet contact part, protrusion member)
F Hook rotation control surface (pressed surface)
F1 Convex cam surface part F2 Concave cam surface part M Motor R Ratchet rotation control surface (pressed surface)
R1 First concave cam surface portion R2 Second concave cam surface portion R3 Plane portion

Claims

A hook that is rotatable to a lock position for holding the striker, a release position for releasing the striker, and an overstroke position that advances from the lock position in a direction opposite to the release position;
A latching position that engages with the hook in the lock position and restricts rotation in the release direction; a ratchet that is pivotable to a latch release position that releases the engagement; and a motor that drives the hook Controlling the rotation of the ratchet, and when the hook and ratchet transition from the disengaged state to the engaged state, simultaneously hold the hook and ratchet at the overstroke position and the unlocking position, respectively, Electric rotation control means for rotating the ratchet to the locking position and rotating the hook to the locking position while holding the lever at the overstroke position;
A locking device comprising:
The locking device according to claim 1, wherein the electric rotation control unit rotates the hook from the lock position to the overstroke position when the hook and the ratchet shift from the engaged state to the disengaged state. And a locking device for rotating the ratchet from the locking position to the locking release position while holding the hook at the overstroke position.
3. The locking device according to claim 2, wherein the hook has a half-lock position engageable with the ratchet in the locking position between the lock position and the release position, and the hook and the ratchet are engaged with each other. When the hook is rotated to the release position after the release, the electric rotation control means rotates the hook by motor driving to the release position, and the ratchet is moved until the hook passes at least the half-lock position. A locking device that is held in the unlocked position.
The locking device according to any one of claims 1 to 3, wherein the electric rotation control means is provided on a rotating body that is rotationally driven by a motor so as to be eccentric from a rotation center. A hook contact portion that is capable of contacting the hook and controlling the rotational position of the hook in the contact state; and a ratchet contact portion that is capable of contacting the ratchet and controls the rotational position of the ratchet in the contact state. Locking device.
5. The locking device according to claim 4, wherein the hook contact portion and the ratchet contact portion are projecting members protruding from the rotating body, and at least one of the hook and ratchet is caused by rotation of the rotating body. A locking device having a pressed surface to be pressed by the protruding member on an outer surface and being urged to rotate in a direction in which the pressed surface is brought into contact with the protruding member.