JP7184634B2 - door latch device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a door latching device used, for example, in a car.

Conventionally, as disclosed in Patent Document 1, there is a door latch device that includes a worm, a rotatable worm wheel that meshes with the worm, and a stopper for restricting the rotation of the worm wheel. When the worm wheel rotates by a predetermined angle, a portion of the worm wheel comes into contact with the stopper. This prevents the worm wheel from rotating beyond a predetermined angle.

Japanese Patent Publication No. 2015-515557

In the conventional door latch device described above, the stopper is made of an elastic material to prevent damage to the worm wheel. As a method for enhancing the effect of suppressing this damage, it is conceivable to adjust the rotation speed of the motor so that a part of the worm wheel comes into contact with the stopper at a low speed.

However, the method of adjusting the rotational speed of the motor causes a problem of complicating the control of the motor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a door latch device that can prevent complication of motor control.

A door latch device according to one aspect of the present invention includes:
a motor that generates a driving force;
a rotating member that receives the driving force and rotates within a predetermined rotation range;
a regulating member that contacts the rotating member rotated to at least one of one end of the rotating range and the other end of the rotating range and restricts rotation of the rotating member;
The regulating member is provided with a sliding contact portion that is in sliding contact with the rotating member ,
A first biasing member biasing the restricting member toward the rotating member is provided .

The door latch device of the present invention can prevent complication of motor control.

It is a perspective view of the door latch device of one embodiment of the present invention. 3 is a perspective view of a first case, a motor, and the like; FIG. FIG. 4 is a perspective view of a worm wheel and stopper; FIG. 10 is another perspective view of the worm wheel and stopper; 4 is a plan view of the shaft portion of the first case and its peripheral portion; FIG. It is a perspective view of the shaft part of the said 1st case, and its peripheral part. FIG. 10 is another perspective view of the shaft portion of the first case and its peripheral portion; FIG. 4 is a schematic cross-sectional view of the shaft portion of the first case and its peripheral portion; 3 is a perspective view of the worm wheel and the like in the state of FIG. 2; FIG. FIG. 10 is a perspective view of the worm wheel and the like in another state;

BEST MODE FOR CARRYING OUT THE INVENTION The door latch device of the present invention will be described in detail below with reference to the illustrated embodiments.

FIG. 1 is a perspective view of a door latch device 1 according to one embodiment of the present invention, viewed from the fork 20 side.

For example, the vehicle body of an automobile (not shown) mounts the door latch device 1 . More specifically, the vehicle body has an opening on its side that is opened and closed by a side door. A striker 2 that can be engaged with a fork 20 of the door latch device 1 is provided on the periphery of the opening.

The door latch device 1 is provided on the peripheral edge of the side door and faces the striker 2 when the side door is closed. The door latch device 1 also includes a case 10, a fork 20 rotatably attached to the case 10, and a recess 30 into which the striker 2 is inserted.

The case 10 includes a first case 11 made of resin, for example, and a second case 12 made of resin, for example, combined with the first case 11 . A terminal portion 40 for supplying power to the motors 51 and 61 (shown in FIG. 2) is exposed from the second case 12 .

When the side door is closed, the fork 20 assumes a posture (latch posture) that prevents the striker 2 from leaving the recess 30, and prohibits the side door from rotating in the opening direction. Further, the fork 20 assumes a posture (unlatched posture) in which the striker 2 can be separated from the recessed portion 30 when the side door is opened, so that the side door can be rotated in the opening direction.

The door latch device 1 also includes a claw lever that can be engaged with the fork 20 (not shown). When the claw lever is engaged with the fork 20, change from the latched posture to the unlatched posture is prohibited. Conversely, when the engagement between the claw lever and the fork 20 is released, the latched posture can be changed to the unlatched posture.

FIG. 2 is a perspective view of the first case 11, the motor 51, etc., viewed from the opening 11a side. 2, illustration of some components of the door latch device 1 is omitted.

The door latch device 1 includes a first locking mechanism 50 for controlling locking and unlocking of the side door, and a second locking mechanism 50 for enabling and disabling operation of a door lock knob (not shown) inside the side door. and a mechanism 60 .

The first case 11 is provided with a first lock mechanism 50, a second lock mechanism 60, and the like. This first case 11 has an opening 11a that is closed by a second case 12 (shown in FIG. 1).

The first lock mechanism 50 includes a motor 51 , a round bar-shaped worm 54 , a disk-shaped worm wheel 55 , and a bar-shaped joint 56 .

The motor 51 has a motor body 52 and an output shaft 53 projecting from the motor body 52 . By supplying power to the motor 51 , the output shaft 53 rotates together with the worm 54 .

The worm 54 is attached to the output shaft 53 so as to be movable relative to the output shaft 53 in the axial direction of the output shaft 53 and so as to be immovable relative to the output shaft 53 in the circumferential direction of the output shaft 53 . One axial end of the worm 54 is rotatably supported by the first support portion 11 b of the first case 11 . On the other hand, the other axial end of the worm 54 is rotatably supported by the second support portion 11 c of the first case 11 .

The worm wheel 55 is rotatably attached to the shaft portion 11 d of the first case 11 . A tooth portion is formed over the entire circumference of the outer peripheral edge of the worm wheel 55 . This tooth portion meshes with the tooth portion on the outer peripheral edge of the worm 54 . As a result, the worm wheel 55 rotates as the worm 54 rotates. At this time, an engaging portion (not shown) on the lower surface of the worm wheel 55 engages the joint 56 to move the joint 56 downward in FIG. 2 or upward in FIG. Here, the downward direction in FIG. 2 corresponds to the direction on the worm wheel 55 side with respect to the worm 54 . The upward direction in FIG. 2 corresponds to the direction opposite to the worm wheel 55 with respect to the worm 54 .

The forward rotation of the worm wheel 55 causes the joint 56 to move upward in FIG. At this time, a link (not shown) that interlocks with the joint 56 moves to the locked position, and a locked state in which the connection between the link and the claw lever is released is established. In this locked state, the link interlocked with the operation of the door handle (not shown) cannot operate the claw lever, and the side door cannot be opened by operating the door handle. On the other hand, the joint 56 moves downward in FIG. 2 when the worm wheel 55 rotates in the opposite direction. At this time, the link and the like move to the unlocked position, and an unlocked state is established in which the link and the claw lever are connected. In this unlocked state, the link interlocked with the operation of the door handle can operate the claw lever, and the side door can be opened by operating the door handle. Simply put, upward movement of the joint 56 in FIG. 2 enables locking of the side door, while downward movement of the joint 56 in FIG. 2 enables unlocking of the side door. The state of the joint 56 in FIG. 2 is the state after the joint 56 has moved upward in FIG.

The second lock mechanism 60 includes a motor 61 , a round bar-shaped worm 64 , a worm wheel 65 , a slider 66 and a rotor 67 . The worm wheel 65 is an example of a rotating member.

The motor 61 is positioned below the motor 51 of the first lock mechanism 50 in FIG. In other words, the motor 51 of the first locking mechanism 50 is located on the top side of the vehicle, and the motor 61 of the second locking mechanism 60 is located on the bottom side of the vehicle. This motor 61 also has a motor main body 62 and an output shaft 63 like the motor 51 .

The worm 64 rotates integrally with the output shaft 63 when power is supplied to the motor 61 , and is movable with respect to the output shaft 63 in the axial direction of the output shaft 63 . That is, the method of attaching the worm 64 to the output shaft 63 is the same as the method of attaching the worm 54 to the output shaft 53 . Further, the worm 64 is rotationally supported by the first support portion 11 e and the second support portion 11 f of the first case 11 .

The worm wheel 65 receives the driving force of the motor 61 and rotates within a predetermined rotation range. More specifically, the worm wheel 65 is rotatably attached to the shaft portion 11 g of the first case 11 and meshes with the worm 64 . As a result, the driving force of the motor 61 is transmitted to the worm wheel 65 via the worm 64, and the worm wheel 65 rotates.

The slider 66 is connected to the worm wheel 65 . More specifically, a first protrusion 66a at one end of the slider 66 is inserted into an arc-shaped long hole 651b provided in the worm wheel 65 in a plan view. The biasing force of the spring 69 presses the first protrusion 66a against the inner wall of the long hole 651b on the rotor 67 side. On the other hand, the second protrusion 66b at the other end of the slider 66 is inserted into an elongated hole 67a provided in the rotor 67 and having a linear shape in plan view. The long hole 67a regulates the moving direction of the second protrusion 66b, but does not prohibit the movement of the second protrusion 66b. That is, the second projecting portion 66b is movable inside the elongated hole 67a.

The rotor 67 has a central portion rotatably attached to the shaft portion 11h of the first case 11 . The slot 67 a extends between one end of the rotor 67 and the center of the rotor 67 . A protruding portion 67b at the other end of the rotor 67 is inserted into a long hole 56a at the end of the joint 56 on the lower side in FIG. Here, the diameter of the protrusion 67b is smaller than the length of the long hole 56a in the longitudinal direction.

The door latch device 1 also includes a lock knob lever 70 that interlocks with the door lock knob inside the side door. One end of the lock knob lever 70 is rotatably attached to the shaft portion 11 h of the first case 11 and has the same rotation axis as the rotor 67 . One end of a door lock wire (not shown) connected to a door lock knob is connected to the other end of the lock knob lever 70 .

In the state shown in FIG. 2, when the passenger operates the door lock knob to the unlock side, the lock knob lever 70 rotates clockwise about the shaft portion 11h and abuts the second protrusion 66b of the slider 66. As shown in FIG. At this time, the lock knob lever 70 presses the peripheral edge of the elongated hole 67a of the rotor 67 via the second protrusion 66b of the slider 66 . As a result, the rotor 67 also rotates clockwise around the shaft portion 11h, and the joint 56 moves downward in FIG. That is, the side door is unlocked.

2, when the worm wheel 65 is rotated clockwise about the shaft portion 11g, the slider 66 slides with respect to the rotor 67 from the shaft portion 11h side to the shaft portion 11g side. At this time, the second projecting portion 66b of the slider 66 also moves from the shaft portion 11h side to the shaft portion 11g side within the long hole 67a. After that, even if the passenger operates the door lock knob to the unlock side, the lock knob lever 70 rotates clockwise around the shaft portion 11h, but does not contact the second projection portion 66b of the slider 66. As a result, the rotor 67 does not rotate clockwise around the shaft portion 11h, and the joint 56 does not move downward in FIG. That is, the locking of the side door is maintained.

Further, when the worm wheel 65 is rotated counterclockwise about the shaft portion 11g in a state in which the second projection portion 66b of the slider 66 is positioned on the shaft portion 11g side in the elongated hole 67a, the slider 66 moves to the second position. The second protrusion 66b returns from the shaft portion 11g side to the shaft portion 11h side in the elongated hole 67a.

Thus, by turning the worm wheel 65, it is possible to enable or disable the operation of the door lock knob.

FIG. 3A is a perspective view of the worm wheel 65 and the stopper 68 as seen from the second case 12 side. FIG. 3B is a perspective view of the worm wheel 65 and the stopper 68 as seen from the first case 11 side. Note that the shape of the tooth portion 652 is simplified in FIGS. 3A and 3B. Also, the stopper 68 is an example of a regulating member.

As shown in FIGS. 3A and 3B, the worm wheel 65 includes, for example, a disk-shaped base portion 651, for example, an arc-shaped tooth portion 652, for example, a cylindrical hub portion 653, and a first contact portion. 654 , a second contact portion 655 and a projection 657 .

A central portion of the base portion 651 is provided with a through hole 651a into which the shaft portion 11g is rotatably fitted. A long hole 651b is provided at the end of the base portion 651 opposite to the worm 64 (shown in FIG. 2). The elongated hole 651b is also a through hole penetrating through the base portion 651, like the through hole 651a.

The tooth portion 652 continues to the end of the base portion 651 on the worm 64 side. This tooth portion 652 meshes with the tooth portion on the outer peripheral edge of the worm 64 .

The hub portion 653 is erected on the surface of the base portion 651 opposite to the stopper 68 . The space in the hub portion 653 communicates with the through hole 651a, and the shaft portion 11g is rotatably fitted in the space.

The first and second contact portions 654 and 655 are provided on the surface of the base portion 651 on the side of the stopper 68 so as to be spaced from each other in the circumferential direction of the base portion 651 . The first and second contact portions 654 and 655 are located on the worm 64 side of the base portion 651 and protrude from the surface of the base portion 651 on the stopper 68 side. A sliding portion 656 having an arc shape in plan view is provided between the first contact portion 654 and the second contact portion 655 . Also, the first contact portion 654 has substantially the same shape as the second contact portion 655 .

The sliding portion 656 extends from the first contact portion 654 to the second contact portion 655 along the circumferential direction of the base portion 651 and slides on a sliding contact portion 682 described later. The sliding portion 656 is a convex portion provided on the surface of the base portion 651 on the stopper 68 side.

The protruding portion 657 is provided at the end of the base portion 651 opposite to the worm 64 and protrudes from the surface of the base portion 651 on the stopper 68 side. Also, the protrusion height of the protrusion 657 is substantially the same as the protrusion heights of the first and second contact portions 654 and 655 .

The stopper 68 is made of resin such as PP (polypropylene). The stopper 68 abuts on the worm wheel 65 that has been rotated to one end and the other end of the predetermined rotation range of the worm wheel 65 to restrict the rotation of the worm wheel 65 . More specifically, the stopper 68 has a stopper body 681 and a plate-shaped fin portion 684 . The stopper 68 overlaps the worm wheel 65 in the rotation axis direction of the worm wheel 65 . In other words, the stopper 68 is located between the worm wheel 65 and the first case 11 (shown in FIGS. 1 and 2). The stopper main body 681 is an example of a regulating member main body. Also, the fin portion 684 is an example of a first biasing member.

The surface of the stopper body 681 on the worm wheel 65 side is formed in the same shape as the surface of the stopper body 681 on the side opposite to the worm wheel 65 . More specifically, the end portion of the stopper body 681 on the side of the fin portion 684 has an arc-shaped sliding contact portion 682 in plan view on the surface on the worm wheel 65 side. This sliding contact portion 682 is a convex portion provided on the surface of the stopper body 681 on the worm wheel 65 side. The end of the stopper body 681 on the fin portion 684 side has a convex portion 683 having substantially the same shape as the sliding contact portion 682 on the surface opposite to the worm wheel 65 .

The sliding contact portion 682 is in sliding contact with the sliding portion 656 of the worm wheel 65 (see FIG. 5). The radius of curvature of the sliding contact portion 682 is substantially the same as the radius of curvature of the sliding portion 656 . Also, the circumferential length of the sliding contact portion 682 is shorter than the circumferential length of the sliding portion 656 . Also, the radial length of the sliding contact portion 682 is longer than the radial length of the sliding portion 656 .

The end portion of the stopper body 681 on the fin portion 684 side has a first contact surface 681b with which the first contact portion 654 of the worm wheel 65 contacts and a second contact surface 681b with which the second contact portion 655 of the worm wheel 65 contacts. 2 contact surfaces 681c. The first and second contact surfaces 681b and 681c are each made up of part of the outer peripheral surface of the stopper body 681. As shown in FIG.

A through hole 681 a is provided at the end of the stopper body 681 opposite to the fin portion 684 . The through hole 681 a has a larger diameter than the through hole 651 a of the worm wheel 65 . Further, the shaft portion 11g is fitted into the through hole 681a.

The fin portion 684 protrudes from the stopper body 681 in a direction perpendicular to the rotation axis of the worm wheel 65 . More specifically, the fin portion 684 protrudes from the worm 64 side end surface of the stopper body 681 toward the worm 64 side. The fin portion 684 is formed in an arc shape in plan view, and biases the stopper body 681 toward the worm wheel 65 . Also, the sliding contact portion 682 is adjacent to the fin portion 684 in the direction perpendicular to the rotation axis of the worm wheel 65 . In other words, the fin portion 684 is positioned outside the sliding contact portion 682 in the radial direction of the stopper 68 .

4A is a plan view of the shaft portion 11g of the first case 11 and its peripheral portion. FIG. FIG. 4B is a perspective view of the shaft portion 11g of the first case 11 and its peripheral portion. FIG. 4C is another perspective view of the shaft portion 11g of the first case 11 and its peripheral portion. Note that the worm wheel 65 is not shown in FIGS. 4A to 4C in order to facilitate understanding of the structure of the stopper 68 and its peripheral portion.

As shown in FIGS. 4A to 4C, the shaft portion 11g is thicker at the root side than at the other portions. The stopper 68 is attached to the first case 11 by fitting the through hole 681a of the stopper main body 681 into the base portion of the shaft portion 11g.

First and second holding portions 11i and 11j are provided near the shaft portion 11g. The first and second holding portions 11i and 11j hold the stopper main body 681 therebetween. This prevents the stopper 68 from rotating about the shaft portion 11g.

A contact portion 11k having an arc shape in plan view is provided near the first and second holding portions 11i and 11j.

FIG. 5 is a schematic cross-sectional view of the shaft portion 11g of the first case 11 and its peripheral portion. In FIG. 5, the same constituent parts as those in FIGS. 2 to 4C are given the same reference numerals as the constituent parts in FIGS. 2 to 4C.

When the stopper 68 is attached to the first case 11, the contact portion 11k contacts the fin portion 684, and the fin portion 684 side of the stopper body 681 slightly rises from the first case 11 toward the second case 12 side. At this time, the fin portion 684 is elastically deformable in the axial direction of the shaft portion 11g, and the fin portion 684 side of the stopper body 681 is slightly movable in the axial direction of the shaft portion 11g.

FIG. 6A is a perspective view of the worm wheel 65 and the like in the state of FIG. 2 as viewed from the first case 11 side. FIG. 6B is a perspective view of the worm wheel 65 and the like in another state as seen from the first case 11 side. In FIGS. 6A and 6B, the same components as those in FIGS. 2, 3A and 3B are given the same reference numbers as those in FIGS. 2, 3A and 3B.

As shown in FIGS. 6A and 6B, the door latch device 1 includes a spring 80 that biases the worm wheel 65 in the rotational direction. Note that the spring 80 is an example of a second biasing member.

The spring 80 has one bent end portion 80a located on the worm wheel 65 side and the other linearly extending end portion 80b located on the motor 61 side. One end 80 a of this spring 80 engages with the projection 657 of the worm wheel 65 . As a result, the spring 80 rotates the worm wheel 65 in the rotational direction of the arrow R when the worm wheel 65 rotates in the rotational direction of the arrow R and exceeds a predetermined rotational position, as shown in FIG. 6A. force. On the other hand, as shown in FIG. 6B, the spring 80 rotates the worm wheel 65 in the direction of arrow L when the worm wheel 65 rotates in the direction of arrow L and exceeds the predetermined rotation position. force. Note that the rotation direction indicated by the arrow L is an example of the first rotation direction. Also, the rotation direction indicated by arrow R is an example of a second rotation direction.

The first abutting portion 654 of the worm wheel 65 is provided on the rotation direction side of the arrow R with respect to the stopper 68, and when the worm wheel 65 rotates in the rotation direction of the arrow L, the stopper main body 681 is moved. It contacts the first contact surface 681b.

The second contact portion 655 of the worm wheel 65 is provided closer to the rotation direction of the arrow L than the stopper 68, and when the worm wheel 65 rotates in the rotation direction of the arrow R, the stopper main body 681 is moved. It contacts the second contact surface 681c.

In the door latch device 1 configured as described above, the stopper 68 has the sliding contact portion 682 that comes into sliding contact with the sliding portion 656 of the worm wheel 65 . As a result, when the worm wheel 65 rotates, the dynamic friction between the sliding portion 656 of the worm wheel 65 and the sliding contact portion 682 of the stopper 68 reduces the rotational speed of the worm wheel 65 . Therefore, when the first and second contact portions 654 and 655 of the worm wheel 65 contact the first and second contact surfaces 681b and 681c of the stopper 68, damage to the worm wheel 65 can be suppressed.

Deceleration of the rotation speed of the worm wheel 65 can be obtained without special control of the motor 61 . Therefore, complication of control of the motor 61 can be prevented.

In addition, in the door latch device 1 , the stopper 68 overlaps the worm wheel 65 in the rotation axis direction of the worm wheel 65 . Therefore, it is not necessary to secure a large space for arranging the stopper 68 in the direction perpendicular to the rotation axis of the worm wheel 65 .

Further, in the door latch device 1 , the fin portion 684 urges the sliding contact portion 682 of the stopper 68 toward the sliding portion 656 of the worm wheel 65 . Further, the fin portion 684 is supported by the contact portion 11k, and the fin portion 684 side of the stopper body 681 slightly rises from the first case 11 toward the second case 12 side. As a result, even if the sliding portion 656 of the worm wheel 65 and the sliding contact portion 682 of the stopper 68 bump due to fluctuations in dynamic friction, the sliding contact portion 682 of the stopper body 681 can escape to the first case 11 side. . As a result, it is possible to prevent the worm wheel 65 from bumping into the stopper 68 and stopping the operation of the worm wheel 65 unexpectedly. Therefore, the effect of decelerating the rotation speed of the worm wheel 65 can be stably maintained.

In addition, since the fin portion 684 urges the sliding contact portion 682 of the stopper 68 toward the sliding portion 656 of the worm wheel 65, even if the sliding portion 656 or the sliding contact portion 682 is deformed or worn over time, it will not slide. The sliding of the moving part 656 can be maintained.

In addition, in the door latch device 1 , the sliding contact portion 682 is adjacent to the fin portion 684 in the direction orthogonal to the rotation axis of the worm wheel 65 . Thereby, the sliding contact portion 682 of the stopper 68 can be effectively pressed against the sliding portion 656 of the worm wheel 65 . Therefore, the effect of decelerating the rotational speed of the worm wheel 65 can be easily obtained.

Further, in the door latch device 1 , the fin portion 684 is elastically deformed when the stopper 68 is attached to the first case 11 . Therefore, if the stopper 68 is attached to the first case 11 , the restoring force of the fin portion 684 can bias the stopper body 681 toward the worm wheel 65 . As a result, the process for attaching the stopper 68 to the first case 11 also serves as the process for biasing the stopper main body 681 against the worm wheel 65, thereby simplifying the manufacturing process and increasing manufacturing efficiency. can.

Further, in the door latch device 1 , when the stopper 68 is attached to the first case 11 , the fin portion 684 contacts the contact portion 11 k of the first case 11 . Therefore, by attaching the stopper 68 to the first case 11, the fin portion 684 can be reliably elastically deformed.

Further, in the door latch device 1 , the sliding contact portion 682 is a convex portion provided on the surface of the stopper body 681 on the worm wheel 65 side. This prevents the sliding contact area of the stopper 68 from becoming too large. Therefore, it is possible to prevent the rotation speed of the worm wheel 65 from being excessively reduced.

In addition, in the door latch device 1 , since the sliding contact portion 682 has an arc shape in plan view, the worm wheel 65 can be smoothly rotated along the sliding contact portion 682 .

Further, in the door latch device 1, the spring 80 biases the worm wheel 65 in the direction of rotation of arrow L when the worm wheel 65 rotates in the direction of rotation of arrow L and exceeds a predetermined rotation position. , the rotation of the worm wheel 65 in the direction of arrow L can be assisted.

On the other hand, the spring 80 urges the worm wheel 65 in the rotational direction of the arrow R when the worm wheel 65 rotates in the rotational direction of the arrow R and exceeds the predetermined rotational position. Rotation in the rotation direction of arrow R can be assisted.

Moreover, since the spring 80 can assist the rotation of the worm wheel 65 in the rotation directions of the arrows L and R, the number of parts for assisting the rotation can be reduced. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.

Further, in the door latch device 1, the first contact portion 654 of the worm wheel 65 contacts the first contact surface 681b of the stopper 68 when the worm wheel 65 rotates in the direction of arrow L. As shown in FIG. On the other hand, the second contact portion 655 of the worm wheel 65 contacts the second contact surface 681c of the stopper 68 when the worm wheel 65 rotates in the direction indicated by the arrow R. Therefore, the worm wheel 65 can be reliably rotated only within the predetermined rotation range.

Also, the first contact portion 654 of the worm wheel 65 is provided on the rotating direction side of the arrow R with respect to the stopper 68 . On the other hand, the second contact portion 655 of the worm wheel 65 is provided on the rotating direction side of the arrow L with respect to the stopper 68 . As a result, the stopper 68 can be arranged between the first contact portion 654 and the second contact portion 655 , so that the size of the stopper 68 can be reduced in the rotation direction of the worm wheel 65 .

Further, in the door latch device 1 , the surface of the stopper body 681 on the worm wheel 65 side is formed in the same shape as the surface of the stopper body 681 on the side opposite to the worm wheel 65 . Therefore, even if the stopper 68 is attached to the first case 11 with the wrong side up, the same effects as those described above can be obtained.

Further, the first case 11 is provided with a contact portion 11k that supports the end portion of the stopper 68 on the side where the sliding contact portion 682 is provided toward the worm wheel 65 side. Therefore, by adjusting the length of the contact portion 11k, the degree of contact of the sliding contact portion 682 with the worm wheel 65 can be changed. That is, the dynamic friction between the worm wheel 65 and the sliding contact portion 682 of the stopper 68 can be easily adjusted.

In the above-described embodiment, the stopper 68 abuts the worm wheel 65 when the worm wheel 65 rotates to one end and the other end of the predetermined rotation range. The stopper 68 may contact the worm wheel 65 only when it is rotated to one end or the other end. For example, the worm wheel 65 may not have one of the first and second contact portions 654 and 655 .

Although one stopper 68 is used as an example of the restricting member in the above embodiment, for example, two stoppers 68 may be used. In this case, for example, two stoppers may sandwich a portion of the worm wheel 65 in the rotational direction of the worm wheel 65 .

In the above-described embodiment, the planar view shape of the sliding contact portion 682 is an arc shape, but it may be, for example, a linear shape, a zigzag line shape, or the like.

In the above-described embodiment, the sliding contact portion 682 is a convex portion provided on the surface of the stopper body 681 on the worm wheel 65 side, but the convex portion may not be used. In this case, for example, on the surface of the stopper body 681 on the worm wheel 65 side, the surface roughness of the portion that comes into sliding contact with the sliding portion 656 may be increased.

In the above embodiment, the fin portion 684 is used to urge the stopper body 681 toward the worm wheel 65, but a coil spring, leaf spring, or the like may be used. In this case, for example, a coil spring, leaf spring, or the like may be arranged between the first case 11 and the stopper body 681 .

Although the width of the sliding portion 656 of the worm wheel 65 is smaller than the width of the sliding contact portion 682 of the stopper 68 in the above embodiment, it may be larger than the width of the sliding contact portion 682 of the stopper 68 .

Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments and modifications thereof, and various modifications can be made within the scope of the present invention. For example, one embodiment of the present invention may be obtained by deleting or replacing part of the content described in the above embodiment.

10 case 11 first case 11a opening 11k contact portion 12 second case 50 first lock mechanism 51, 61 motor 60 second lock mechanism 65 worm wheel 68 stopper 651 base portion 652 tooth portion 653 hub portion 654 first contact Part 655 Second contact part 656 Sliding part 657 Protruding part 651a, 681a Through hole 651b Long hole 652 Tooth part 681 Stopper main body 684 Fin part 682 Sliding contact part 681b First contact surface 681c Second contact surface

Claims (11)

a motor that generates a driving force;
a rotating member that receives the driving force and rotates within a predetermined rotation range;
a regulating member that contacts the rotating member rotated to at least one of one end of the rotating range and the other end of the rotating range and restricts rotation of the rotating member;
The regulating member is provided with a sliding contact portion that is in sliding contact with the rotating member ,
A door latch device comprising a first biasing member that biases the restricting member toward the rotating member . The door latch device of claim 1, wherein
A door latch device according to claim 1, wherein the restricting member overlaps the rotating member in a direction of a rotating shaft of the rotating member. The door latch device of claim 1 , wherein
A door latch device, wherein the sliding contact portion is adjacent to the first urging member in a direction orthogonal to the rotation axis of the rotating member. In the door latch device according to any one of claims 1 to 3,
A case having a first case having an opening to which the rotating member and the regulating member are attached and a second case closing the opening;
The regulating member is positioned between the rotating member and the first case,
The door latch device, wherein the first biasing member is elastically deformed when the restricting member is attached to the first case. The door latch device according to claim 4 ,
The regulating member has a regulating member main body,
The first biasing member is a plate-shaped fin portion that protrudes from the regulating member main body in a direction orthogonal to the rotation axis of the rotation member,
A door latch device, wherein the first case has a contact portion with which the fin portion contacts when the restricting member is attached to the first case. In the door latch device according to any one of claims 1 to 5 ,
A door latch device according to claim 1, wherein the sliding contact portion is a convex portion provided on a surface of the regulating member on the rotating member side. In the door latch device according to any one of claims 1 to 6 ,
A door latch device, wherein the planar view shape of the sliding contact portion is an arc shape. In the door latch device according to any one of claims 1 to 7 ,
When the rotating member rotates in the first rotating direction and exceeds a predetermined rotating position, the rotating member is biased in the first rotating direction, and the rotating member rotates in the first rotating direction. a second biasing member that biases the rotating member in the second rotating direction when the rotating member rotates in the second rotating direction opposite to the moving direction and exceeds the predetermined rotating position; A door latch device characterized by: The door latch device according to claim 8 ,
The rotating member is
a first contact portion provided on the side of the second rotation direction relative to the regulation member and contacting the regulation member when the rotation member is rotated in the first rotation direction;
a second abutment portion provided on the side of the first rotation direction relative to the regulation member and abutting against the regulation member when the rotation member is rotated in the second rotation direction; A door latch device characterized by: The door latch device of claim 1, wherein
a first case to which the rotating member and the regulating member are attached and which has an opening;
A case having a second case that closes the opening,
A door latch device according to claim 1, wherein the first case includes a contact portion that supports an end portion of the restricting member on the side where the sliding contact portion is provided toward the rotating member. a motor that generates a driving force;
a rotating member that receives the driving force and rotates within a predetermined rotation range;
a regulating member that abuts on the rotating member rotated to at least one of one end of the rotating range and the other end of the rotating range to restrict rotation of the rotating member;
with
The regulating member is provided with a sliding contact portion that is in sliding contact with the rotating member,
When the rotating member rotates in the first rotating direction and exceeds a predetermined rotating position, the rotating member is biased in the first rotating direction, and the rotating member rotates in the first rotating direction. a second biasing member that biases the rotating member in the second rotating direction when the rotating member rotates in the second rotating direction opposite to the moving direction and exceeds the predetermined rotating position;
The rotating member is
a first contact portion provided on the side of the second rotation direction relative to the regulation member and abutting against the regulation member when the rotation member is rotated in the first rotation direction;
a second abutting portion provided closer to the first rotation direction than the restricting member and abutting against the restricting member when the rotating member rotates in the second rotating direction; A door latch device characterized by:

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