JP2015096683A - Door latch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door latch device in which occurrence of operation failure can be prevented at a low cost.SOLUTION: In a door latch device 1 which comprises a latch mechanism (fork and claw) that engages with a striker provided at a vehicle body (or door) and can release the engagement situation, a door-opening mechanism (first open lever 16, second open lever 17, etc.) that can open-operate the latch mechanism by operating an operation part for door opening, and an actuator 5 that actuates the door-opening mechanism (or latch mechanism), the actuator 5 comprises a housing 24 which houses a motor inside, and a cover which covers above the latch mechanism is provided integrally at the housing 24 of the actuator 5.

Description

  The present invention relates to a door latch device for locking / unlocking the opening / closing of a door such as a trunk lid or a back door of a vehicle with respect to a vehicle body.

  For example, when a striker provided on the vehicle body side and a door latch device provided on the door side are engaged / disengaged, the door of the vehicle or the like is locked / unlocked with respect to the vehicle body.

  By the way, as disclosed in Patent Document 1, for example, the door latch device includes a fork (hook) engaged with and disengaged from the striker and a claw (ratchet) for holding the fork in an engagement position (latch position) with the striker. A latch mechanism, an opening mechanism for releasing the engagement between the fork and the striker by operating the claw of the latch mechanism by operating force of a handle or the like provided on the door, and a driving force of the motor It is comprised including the actuator operated by. Here, the fork and claw of the latch mechanism are pivotally supported by the base plate, and a spring is provided between the fork and the claw so that the fork and the claw are urged in a predetermined direction. ing. In addition, in the actuator provided in such a door latch device, there is a type that switches the opening mechanism between an unlocked state in which an operating force such as a handle can be transmitted to the claw of the latch mechanism, and a locked state in which it cannot be transmitted, Which type of actuator is used is determined by the specifications of the door latch device.

JP 2003-184391 A

  However, in the door latch device proposed in Patent Document 1, the fork, the claw, and the spring are not covered with a cover or the like and are exposed to the outside, so that other members in the door interfere with the claw and the like. Then, malfunction may occur.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a door latch device that can prevent occurrence of malfunction at low cost.

In order to achieve the above object, the invention according to claim 1
A latch mechanism that locks a striker provided on a vehicle body or a door and can release the locked state;
A door opening mechanism capable of opening the latch mechanism by operating the operation unit for opening the door;
An actuator for operating the latch mechanism or the door opening mechanism;
In a door latch device comprising:
The actuator includes a housing that houses a motor therein,
A cover that covers an upper portion of the latch mechanism is provided integrally with the housing of the actuator.

The invention according to claim 2 is the invention according to claim 1,
The latch mechanism is
A fork detachable from the striker;
A claw engageable with the fork;
A base member that supports the fork shaft that pivotally supports the fork and the claw shaft that pivotally supports the claw;
With
The base member is
A fork fixing part for fixing the Zen taste fork shaft;
A claw fixing portion for fixing the claw shaft;
An upright portion erected at a predetermined angle with respect to the fork fixing portion and the claw fixing portion;
With
The door opening mechanism is disposed on the front side of the standing part of the base member, and the actuator is provided on the back side of the standing part of the base member,
The cover is provided with a cutout portion through which the standing portion of the base member can be inserted.

  According to the first aspect of the present invention, since the upper part of the latch mechanism is covered by the cover integrally provided on the housing of the actuator, the components of the latch mechanism are not exposed to the outside, and the other parts in the door are not exposed. Interference between the member and the components of the latch mechanism can be prevented, and malfunction of the door latch device can be prevented. In this case, since the cover is provided integrally with the housing of the actuator, the number of parts can be reduced to reduce the cost of the door latch device, and the cover is also assembled when the actuator is fixed to the base member or the like. Since it is held at the attachment position, the cover can be easily assembled.

  According to the second aspect of the present invention, even when the actuator is arranged on the back side of the base member, the cover provided integrally with the housing of the actuator is attached to the base member by the notch formed in the cover. It can be arranged so as to cover the upper part of the latch fixing part and the claw fixing part of the base member beyond the standing part. For this reason, the door opening mechanism can be arranged by effectively utilizing the space on the front surface side of the standing portion of the base member, and the layout of the door opening / closing mechanism can be improved.

It is a disassembled perspective view of the principal part of the door latch apparatus which concerns on this invention. 1 is a perspective view of a door latch device according to the present invention. It is a front view of the door latch device concerning the present invention. It is the sectional view on the AA line of FIG. It is a top view which shows the state which removed the actuator and door opening mechanism of the door latch apparatus which concern on this invention. It is a back side perspective view showing the state where the actuator of the door latch device concerning the present invention was removed. It is a perspective view of an actuator of a door latch device concerning the present invention. It is the BB sectional view taken on the line of FIG. (A) is a top view which shows the latching state of the latch mechanism of the door latch apparatus which concerns on this invention, (b) is a top view which shows the open state of the latch mechanism. (A) is a front view which shows the locking state of the door opening mechanism of the door latch apparatus which concerns on this invention, (b) is a front view which shows the unlocking state of the door opening mechanism.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is an exploded perspective view of a main part of the door latch device according to the present invention, FIG. 2 is a perspective view of the door latch device, FIG. 3 is a front view of the door latch device, and FIG. 4 is a cross-sectional view taken along line AA in FIG. 5 is a plan view showing a state in which the actuator and door opening mechanism of the door latch device according to the present invention are removed, FIG. 6 is a rear side perspective view showing a state in which the actuator of the door latch device is removed, and FIG. 7 is an actuator of the door latch device. 8 is a cross-sectional view taken along line BB in FIG. 6, FIG. 9A is a plan view showing a latched state of the latch mechanism of the door latch device according to the present invention, and FIG. 9B is a diagram of the latch mechanism. FIG. 10A is a front view showing a locked state of the door opening mechanism of the door latch device, and FIG. 10B is a front view showing an unlocked state of the door opening mechanism.

<Configuration of door latch device>
A door latch device 1 according to the present invention shown in FIGS. 2 and 3 is mounted inside a door (not shown) of a vehicle to lock / unlock the door with respect to a vehicle body (not shown). A rear base 2 and a front base 3 (see FIG. 1) arranged and fixed on the upper surface side thereof, a latch mechanism housed in a space formed between the rear base 2 and the lower surface of the front base 3, A fence block 4 arranged and fixed on the upper surface side, a door opening mechanism provided on the front side (front side in FIGS. 2 and 3) of the standing portion 3A integrally standing on the front base 3, and the standing arrangement The actuator 5 is provided on the back side of the portion 3A (the back side in FIGS. 2 and 3).

  Next, the rear base 2, the front base 3, the latch mechanism, the fence block 4, the door opening mechanism, and the actuator 5 constituting the door latch mechanism 1 according to the present invention will be described.

(Rear base)
As shown in FIG. 1, the rear base 2 is formed in a box shape having an open upper surface, brackets 2A are integrally formed on the left and right sides, and circular screw holes 2a are formed in each bracket 2A. Each is formed. The door latch device 1 is fixed inside the door by tightening a screw (not shown) inserted into a screw hole 2a formed in each bracket 2A of the rear base 2 to a panel (not shown) of the door.

  The rear base 2 is formed with a storage recess 2B for storing the latch mechanism constituted by a fork 8 and a claw 9, which will be described later. The storage recess 2B is provided on the vehicle body side at the center in the width direction. A striker insertion groove 2b is formed through which the U-shaped striker 50 (see FIG. 9A) enters. Further, circular shaft support holes 2c and 2d are formed on both sides of the striker insertion groove 2b of the housing recess 2B of the rear base 2, and a circular hole is formed in the vicinity of one shaft support hole 2c. A fixed hole 2e is formed. Here, as shown in FIG. 9A, a shaft-shaped fork holding member 6 for preventing the fork 8 from tilting in the housing recess 2B of the rear base 2 is inserted into the fixing hole 2e and fixed. Has been. The fork holding member 6 is provided with a flange portion 6a protruding in the radial direction, and the flange portion 6a is located above the side opposite to the engagement groove 8a across the fork shaft 10 of the fork 8 at the latch position. The inclination of the fork 8 is suppressed by engaging with a part (upper surface) of the fork 8 which is located in the storage recess 2 </ b> B of the rear base 2. The flange portion 6a of the fork holding member 6 acts more effectively when the gap between the fork 8 and the latch fixing portion 3B of the front base 3 is large.

(Front base)
As shown in FIG. 1, the front base (base member) 3 is a horizontal latch fixing portion (fork fixing portion and claw fixing portion) that is fitted and fixed in the housing recess 2 </ b> B of the rear base 2 as shown in FIG. 4. 3B and the upright portion 3A that stands up substantially vertically from the rear end portion of the latch fixing portion 3B. A striker insertion groove 3a through which the striker 50 (see FIG. 9A) enters is formed at the center in the width direction of the latch fixing portion 3B, and both sides of the striker insertion groove 3a are sandwiched between the striker insertion grooves 3a. Are formed with circular shaft support holes 3b, 3c and arc-shaped first through holes 3d and second through holes 3e, respectively.

  Further, on the side edge on the front end side of the latch fixing portion 3B of the front base 3, a first restricting portion 3f that protrudes toward the fork 8 (downward in FIG. 1) to restrict the rotation of the fork 8, and the claw 9 side A second restricting portion 3g that protrudes to restrict the rotation of the claw 9 is formed, and a rectangular frame-shaped cushion ring 7 is fitted and fixed to the second restricting portion 3g. Further, tongue-like support convex portions 3h are integrally formed on the left and right of the front end of the latch fixing portion 3B.

  On the other hand, one shaft support hole 3 i and two screw holes 3 j are formed in the standing portion 3 A of the front base 3, and a spring locking portion 3 k is formed by cutting and raising a cable at one end in the width direction. The holding portion 3m is formed by being bent at a substantially right angle. Further, rib-like support convex portions 3n extending toward the front side (front side in FIG. 1) are integrally formed on both side portions and the center in the width direction of the lower end portion of the standing portion 3A.

(Latch mechanism)
In the space formed by the housing recess 2B of the rear base 2 and the lower surface of the front base 3, the fork 8 and the claw 9 constituting the latch mechanism are connected by the fork shaft 10 and the claw shaft 11 as shown in FIG. Each is housed in a pivotally supported state. Here, the fork shaft 10 and the claw shaft 11 are formed at the shaft support holes 2c and 2d (see FIG. 1) formed at the rear base 2 at both ends (upper and lower ends) and the latch fixing portion 3B of the front base 3. The shaft support holes 3b and 3c are respectively inserted and fixed.

  The fork 8 has a latched position for engaging the striker 50 as shown in FIG. 9A when the door is locked, and an opening that opens the striker 50 as shown in FIG. 9B when the door is unlocked. An engagement groove 8a with which the striker 50 is engaged is formed on a part of the outer periphery of the member. Further, an engagement protrusion 8b and an engagement for selectively engaging the engagement projection 9a of the claw 9 at the latch position as shown in FIG. As shown in FIG. 9B, the recess 8c and a stopper portion 8d that contacts the first restriction portion 3f of the front base 3 at the open position are formed.

  Here, the fork 8 is urged toward the open position (counterclockwise in FIG. 9) by a first spring 12 having one end locked in a circular spring-shaped spring locking hole 8e formed therein. . As will be described later, the first spring 12 is provided on the fence block 4 (see FIG. 4).

  As shown in FIG. 9A, the claw 9 has an engagement position where the engagement projection 9 a engages with the engagement recess 8 c of the fork 8, and the engagement projection 9 a and the fork 8. A member that can selectively move (rotate) between a non-engagement position (not shown) in which the engagement with the engagement recess 8c is released, and a part of the outer periphery thereof has an action portion 9b. And a stopper portion 9c. The stopper portion 9c contacts the second restricting portion 3g of the front base 3 in the locked state of the door shown in FIG. 9A and the unlocked state of the door shown in FIG. It fulfills the function of regulating

  Here, the claw 9 is urged toward the engagement position side (clockwise in FIG. 9) by the second spring 13 whose one end is locked to the circular spring-shaped spring locking hole 9d formed therein. . As will be described later, the second spring 13 is provided on the fence block 4 (see FIG. 4).

(Fence block)
As shown in FIG. 4, the fence block 4 is a member arranged and fixed on the upper surface side of the front base 3, and as shown in FIGS. 1 and 5, a striker 50 (see FIG. 9 (a)) is formed for the striker entry groove 4a. Further, on both sides of the fence block 4 with the striker entry groove 4a sandwiched, cylindrical boss-like spring holding portions 4b and 4c, arc-shaped spring through holes 4d and 4e, and vertically extending along the width direction. Ribbed mounting portions 4A are provided, and each mounting portion 4A is formed with a rectangular rectangular cover mounting hole 4f in the width direction.

  The striker insertion groove 4a of the fence block 4 faces a striker urging piece 4g extending integrally from the front end toward the rear, and a shock absorber is formed at the front end of the striker urging piece 4g. The cushion 14 is fitted and fixed (see FIG. 5). The cushion 14 absorbs an impact caused by the striker 50 when the abutment surface 14a (see FIG. 1) abuts against the striker 50 that enters the striker entry groove 4a. This serves to prevent rattling in the entry groove 4a.

  Furthermore, fitting holes 4h are formed at both ends in the width direction and at the center of the rear end of the fence block 4, respectively. At both ends in the width direction of the bottom surface of the front end portion of the fence block 4, fitting holes (not shown) into which the support convex portions 3h of the front base 3 are inserted are formed. Also, spring locking pieces 4i and 4j are formed in the vicinity of the fitting holes 4h on the left and right sides, respectively.

  Thus, as shown in FIGS. 4 and 5, the first spring 12 and the second spring 13 are inserted and held in the spring holding portions 4 b and 4 c provided in the fence block 4. One end of the first spring 12 is locked by the spring locking piece 4 i provided in the fence block 4, and the other end is formed in the spring through hole 4 d formed in the fence block 4 and the front base 3. The first through hole 3d passes through the first through hole 3d and is locked in the spring locking hole 8e of the fork 8. The fork 8 is moved to the open position side (counterclockwise in FIG. 9) by the first spring 12 as described above. It is energized.

  One end of the second spring 13 is locked by the spring locking piece 4j provided on the fence block 4, and the other end is formed in the spring through hole 4e formed in the fence block 4 and the front base 3. The second through hole 3e passes through the second through hole 3e and is locked in the spring locking hole 9d of the claw 9, and the claw 9 is moved to the engagement position side (clockwise in FIG. 9) by the second spring 13 as described above. It is energized.

(Door opening mechanism)
The door opening mechanism is a mechanism that can open the latch mechanism by operating an operation member (not shown) such as a door handle for opening the door. As shown in FIGS. A locking lever 15, a first open lever 16, a second open lever 17, an inner cable 18a of a cable 18 having one end connected to the second open lever 17, An operation member (not shown) connected to the other end of the inner cable 18a is included.

  An intermediate portion of the locking lever 15 is connected to an output shaft (not shown) of the actuator 5 by a screw 19 (see FIG. 7). Accordingly, the locking lever 15 is rotated by the actuator 5. And the locking lever 15 is selectively urged | biased by the urging | biasing spring 20, respectively in the locking position and unlocking position directions, and the connection pin 21 is provided in the end.

  The intermediate portion of the first open lever 16 and the second open lever 17 is pivotally supported by a shaft portion 22 attached to the shaft support hole 3 i of the front base 3. The upper engaging portion 16 a is engaged with a rectangular engaging hole 17 a formed in the second open lever 17. Accordingly, the first open lever 16 and the second open lever 17 rotate integrally around the shaft portion 22. Here, the first open lever 16 is formed with a slide hole 16b that is long in the vertical direction, and the shaft portion 22 is inserted through the slide hole 16b. Accordingly, the first open lever 16 can slide in the vertical direction with respect to the shaft portion 22.

  In addition, a U-shaped connecting portion 16A is provided at an intermediate portion of the first open lever 16, and a connecting hole 16c that is long in the lateral direction is formed in the connecting portion 16A. The connecting roller 21 provided at one end of the locking lever 15 is slidably engaged with the connecting hole 16c. Note that the lower end portion of the first open lever 16 constitutes an operation portion 16d, and this operation portion 16d passes through the standing portion 3A of the front base 3 to the back side as shown in FIG. The lower end faces the vicinity of the claw 9 of the latch mechanism.

  As shown in FIGS. 2 and 3, the second open lever 17 is formed with a spring locking portion 17 b, and the spring locking portion 17 b and the above-described standing portion 3 </ b> A of the front base 3 are formed. A return spring 23 for biasing the second open lever 17 to the initial position before the operation is interposed in the spring locking portion 3k.

  By the way, one end of the cable 18 is held by the cable holding portion 3m provided on the standing portion 3A of the front base 3, and one end of the inner cable 18a extending from the cable 18 is connected to the second open lever 17. It is connected to the upper end.

(Actuator)
The actuator 5 is for rotating the locking lever 15, and is provided on the back side of the standing portion 3A of the front base 3 as shown in FIGS. The actuator 5 includes a housing 24 formed by joining and integrating a front case 24A and a rear case 24B. The housing 24 includes an electric motor (not shown) that is a drive source, and a speed reduction of the electric motor. A deceleration mechanism (not shown) that transmits to an output shaft (not shown) is incorporated. The housing 24 is formed with a connector portion 24a, and a connector (not shown) connected to an end of a power cord (not shown) is inserted into the connector portion 24a, so that a power source (not shown) is connected to the electric motor. Electric power can be supplied and the electric motor is started.

  As shown in FIG. 7, a bifurcated cover 24C is integrally extended substantially horizontally from the lower end of the front case 24A of the housing 24 toward the front (front side in FIG. 7). A tongue-shaped front end convex portion 24b is formed on each of the left and right tip portions of 24C. A notch 24c is formed at the base end of the cover 24C of the front case 24A. A circular screw hole 24d is formed at a predetermined position of the housing 24 (two locations corresponding to the two screw holes 3j formed in the standing portion 3A of the front base 3).

<Assembly procedure of door latch device>
Next, an assembly procedure of the door latch device 1 configured as described above will be described.

  When the door latch device 1 is assembled, a fork 8 and a claw 9 constituting a latch mechanism are assembled in a space formed between the rear base 2 and the front base 3, and the fork 8 and the claw 9 are assembled with the fork shaft 10 and the claw. The shaft 11 is rotatably supported by the shaft 11 (see FIG. 4).

  Next, the fence block 4 is attached to the upper surface of the latch fixing portion 3B of the front base 3, and the first open lever 16 and the second open lever 17 constituting the door opening mechanism are provided on the front side of the standing portion 3A of the front base 3. Assemble. When the fence block 4 is attached to the front base 3, the left and right support protrusions 3h formed at the front end of the front base 3 are placed on the front end of the rear base 2, and the rear end of the front base 3 is placed. As shown in FIG. 8, the support protrusion 3n and the support protrusion 3h formed on the fitting block 4h formed on the rear end of the fence block 4 and the fitting hole formed on the bottom of the front end (not shown) ). Here, as shown in FIG. 8, the engaging claw 3 n 1 is formed on the support convex portion 3 n of the front base 3, and the elastic claw 4 k is formed on the fence block 4. The engaging claws 3n1 and the elastic claws 4k constitute a locking structure. When the engaging claws 3n1 of the front base 3 are engaged with the elastic claws 4k of the fence block 4, the fence block 4 is moved to the front base 3. It is securely fixed against. In this case, the fence block 4 can be easily attached to the front base 3 by one touch only by aligning the fitting hole 4h of the fence block 4 with the support protrusion 3n of the front base 3 and pushing the fence block 4 into the front base 3. be able to. Further, since the mounting direction of the fence block 4 is the same as the direction in which the striker 50 enters, the fence block 4 is pushed into the front base 3 even when the striker 50 collides with the fence block 4 when the door is closed. Since the force acts in the direction, the fence block 4 does not fall off from the front base 3, and the fence block 4 is securely fixed to the front base 3.

  Thereafter, the actuator 5 is assembled from the side with respect to the front base 3 so that the standing portion 3A of the front base 3 passes through a notch 24c formed in the housing 24 (front case 24A), and then the actuator 5 5 is pushed forward, the front end protrusions 24b formed on the left and right front ends of the cover 24C of the housing 24 (front case 24A) of the actuator 5 are provided on the mounting portion 4A. As shown in FIGS. 2 and 3, the cover mounting hole 4f is inserted. Then, from this state, the screw 25 inserted into the screw hole 3j (see FIG. 1) formed in the standing portion 3A of the front base 3 and the screw hole 24d formed in the housing 24 of the actuator 5 is fastened to the housing 24. As a result, the actuator 5 is fixed to the standing portion 3A of the front base 3 as shown in FIGS.

  Finally, the locking lever 15 is fixed to the output shaft (not shown) of the actuator 5 with a screw 19, and a connecting roller 21 provided at one end of the locking lever 15 is formed on the connecting portion 16 </ b> A of the first open lever 16. When the locking lever 15 and the first open lever 16 are connected by engaging with the connecting hole 16c, the assembly of the door latch device 1 is completed.

  In the door latch device 1 assembled in this way, as shown in FIG. 2, since the cover 24C is attached so as to cover the upper surface of the fence block 4, it is attached to the spring holding portions 4b and 4c of the fence block 4. In addition, the first spring 12 and the second spring 13 are not exposed to the outside and do not interfere with other members in the door, so that the occurrence of malfunction can be prevented. Further, the cover 24C can prevent dust and the like from entering the inside of the latch mechanism, and can further improve the appearance.

<Operation of door latch device>
Next, the operation of the door latch device 1 according to the present invention will be described.

(1) Operation when opening the door in the closed state (locked state):
As shown in FIG. 9 (a), the actuator 5 is in an inoperative state in the locked state where the door closed state is locked because the striker 50 on the vehicle body side is engaged with the engaging groove 8a of the fork 8. The locking lever 15 is in the locked position. At this time, as shown in FIG. 10A, the first open lever 16 moves upward with respect to the shaft portion 22 and is in the locked position. The operation portion 16d at the lower end of the first open lever 16 It is above and does not engage the claw 9. Therefore, an operation member (not shown) such as a door handle is operated to pull the inner cable 18a, and the second open lever 17 and the first open lever 16 are rotated around the shaft portion 22 in the clockwise direction in FIG. Even if it is moved, the operating portion 16d of the first open lever 16 does not reach the claw 9, so that the engaging convex portion 9a of the claw 9 engages with the engaging concave portion 8c of the fork 8 as shown in FIG. Then, the fork 8 is held in the latch position. In this state, the door is locked and cannot be opened. At this time, the claw 9 is held in the engaged position with its stopper portion 9c abutting against the second restricting portion 3g of the front base 3.

  In order to open the door from the above state, when an unlocking signal is transmitted to a ECU (not shown) from a traffic signal carried by the driver, the ECU receiving this signal supplies a current to the electric motor of the actuator 5 to supply the electric motor. Start the motor. Then, the rotation of the electric motor is reduced by a reduction mechanism (not shown) and transmitted to the output shaft, and the locking lever 15 attached to the output shaft rotates clockwise from the locking position.

  When the locking lever 15 rotates as described above, the first open lever 16 in which the connection hole 16c for engaging the connection roller 21 provided at the end of the locking lever 15 is formed is shown in FIG. Thus, the shaft portion 22 moves downward, and reaches the unlocking position where the operation portion 16d at the lower end engages with the action portion 9b of the claw 9. From this state, when an operation member such as a door handle (not shown) is operated to pull the inner cable 18a, the second open lever 17 and the first open lever 16 connected thereto are centered on the shaft portion 22 in FIG. In order to rotate in the clockwise direction of b), the operation part 16d at the lower end of the first open lever 16 engages with the action part 9b of the claw 9, and the claw 9 is moved from the position shown in FIG. It is rotated to the non-engagement position in the counterclockwise direction against the urging force. Then, the engagement between the engagement convex portion 9a of the claw 9 and the engagement concave portion 8c of the fork 8 is released, and the fork 8 is centered on the fork shaft 10 by the urging force of the first spring 12 as shown in FIG. As shown, the counterclockwise rotation and movement to the open position allows the striker 50 to freely come out of the engagement groove 8a of the fork 8, and the door can be opened. At this time, as shown in FIG. 9B, the fork 8 has its stopper portion 8d abutting against the first restricting portion 3f of the front base 3 and its rotation is restricted and held in the open position. .

(2) Action when closing an open door:
When the door is open, as shown in FIG. 9B, the fork 8 is in the open position, and the engagement groove 8 a of the fork 8 stands by at a position where the striker 50 can be received. Further, the claw 9 is urged by the urging force of the second spring 13 and is in contact with the fork 8 as shown in FIG.

  Thus, when the door is closed from the above state, the engagement groove 8a formed in the fork 8 of the door latch device 1 attached to the door is fitted into the striker 50 fixed to the vehicle body. That is, relatively, the striker 50 is inserted into the engagement groove 8 a of the fork 8, and the striker 50 engages with the engagement groove 8 a of the fork 8 to resist the urging force of the first spring 12. Then, the fork shaft 10 is rotated in the counterclockwise direction in FIG. 9B around the fork shaft 10 to the latch position shown in FIG. 9A.

  Then, when the engaging projection 8b of the fork 8 passes the engaging projection 9a of the claw 9, the claw 9 is rotated in the clockwise direction of FIG. 9B by the urging force of the second spring 13, and FIG. As shown in FIG. 9 (a), the fork 8 is held in the latch position as shown in FIG. 9 (a) in order to engage with the engaging recess 8c of the fork 8, and shifts to a locked state that prevents the door from being opened. Then, when the electric motor of the actuator 5 is activated and the locking lever 15 rotates to the locking position, the first open lever 16 moves to the locking position with respect to the shaft portion 22 as shown in FIG. Move up. Thus, the 1st open lever 16 moves to a locking position. When the first open lever 16 moves to the locking position in this way, the operation portion 16d at the lower end of the first lock lever 16 is positioned above the claw 9 and does not reach the claw 9, so that an operation member such as a door handle is used. Even if is operated, the locked state of the door is maintained and the door cannot be opened.

  As described above, in the door latch device 1 according to the present embodiment, the fork 8 and the claw 9 of the latch mechanism, particularly the present embodiment, are provided by the cover 24C provided integrally with the housing 24 (front case 24A) of the actuator 5. Since the upper portions of the first spring 12 and the second spring 13 are covered, the components of the latch mechanism are not exposed to the outside, and the fork 8, the claw 9, the first and second springs 12, 13 are not exposed. Does not interfere with other members in the door, and the occurrence of malfunction of the door latch device 1 can be prevented. In this case, since the cover 24C is provided integrally with the housing 24 (front case 24A) of the actuator 5, the number of parts can be reduced and the cost of the door latch device 1 can be reduced. When the cover 3 is fixed to the base 3, the cover 24C is also held at the assembly position, so that the cover 24C can be easily assembled.

  Further, according to the door latch device 1 according to the present embodiment, even when the actuator 5 is arranged on the back side of the standing portion 3A of the front base 3, it is integrated with the housing 24 (front case 24A) of the actuator 5. The cover 24 </ b> C provided as a target can be arranged so as to cover the upper part of the latch fixing portion 3 </ b> B of the front base 3 beyond the standing portion 3 </ b> A of the front base 3 by the notch 24 c formed in the cover 24 </ b> C. For this reason, the door opening mechanism (the first open lever 16 and the second open lever 17) can be arranged by effectively utilizing the space on the front side of the standing portion 3A of the front base 3, and the door opening and closing mechanism Layout can be improved.

  In the above embodiment, the example in which the door latch device 1 is provided on the door side of the vehicle and the striker 50 is provided on the vehicle body side has been described. On the contrary, the striker 50 is provided on the door side and the vehicle body side is provided. Even when the door latch device 1 is provided, the same effect as described above can be obtained.

  Further, in the above embodiment, the operating force of the operating member such as the door handle is transmitted to or cannot be transmitted to the claw 9 by rotating the locking lever 15 to the locked position or unlocked position by the actuator 5. Although the door latch device 1 that employs the switching method has been described, the present invention similarly applies to a door latch device that employs a method in which the claw 9 is moved directly to the engaged position or the non-engaged position by the electric force of the actuator 5. Of course, it is applicable.

DESCRIPTION OF SYMBOLS 1 Door latch apparatus 2 Rear base 2A Rear base bracket 2B Rear base storage recess 2a Rear base screw hole 2b Rear base striker insertion groove 2c, 2d Rear base shaft support hole 2e Rear base fixing hole 3 Front base (base member)
3A Front base standing part 3B Front base latch fixing part (fork fixing part, claw fixing part)
3a Front base striker insertion groove 3b, 3c Front base shaft support hole 3d Front base first through hole 3e Front base second through hole 3f Front base first restricting portion 3g Front base second restricting portion 3h Front Base support convex part 3i Front base shaft support hole 3j Front base screw hole 3k Front base spring locking part 3m Front base cable holding part 3n Front base support convex part 3n1 Support convex part engaging claw 4 Fence Block 4A Fence block mounting portion 4a Fence block striker entry groove 4b, 4c Fence block spring holding portion 4d, 4e Fence block spring through hole 4f Fence block cover mounting hole 4g Fence block striker biasing piece 4h 4i, 4j Fence block spring locking piece 4k Fence block elastic claw 5 Actuator 6 Fork holding member 7 Cushion ring 8 Fork 8a Fork engagement groove 8b Fork engagement protrusion 8c Fork engagement Recessed portion 8d Fork stopper portion 8e Fork spring locking hole 9 Claw 9a Claw engaging convex portion 9b Claw action portion 9c Claw stopper portion 9d Claw spring locking hole 10 Fork shaft 11 Claw shaft 12 First spring 13 Second spring 14 Cushion 14a Cushion contact surface 15 Locking lever 16 First open lever 16A First open lever connecting portion 16a First open lever engaging portion 16b First open lever slide hole 16c First open Lever connecting hole 16d First open lever operating portion 17 Second open lever 17a Second open lever engaging hole 17b Second open lever spring locking portion 18 Cable 18a Inner cable 19 Screw 20 Biasing spring 21 Connecting pin 22 Shaft 23 Return Spring 24 Housing 24A Housing Front Case 24B Housing Rear Case 24C Housing Cover 24a Housing Connector 24b Housing Front End Projection 24c Housing Notch 24d Housing Screw Hole 25 Screw 50 Strike

Claims (2)

A latch mechanism that locks a striker provided on a vehicle body or a door and can release the locked state;
A door opening mechanism capable of opening the latch mechanism by operating the operation unit for opening the door;
An actuator for operating the latch mechanism or the door opening mechanism;
In a door latch device comprising:
The actuator includes a housing that houses a motor therein,
A door latch device characterized in that a cover for covering an upper portion of the latch mechanism is provided integrally with the housing of the actuator. The latch mechanism is
A fork detachable from the striker;
A claw engageable with the fork;
A base member that supports the fork shaft that pivotally supports the fork and the claw shaft that pivotally supports the claw;
With
The base member is
A fork fixing part for fixing the Zen taste fork shaft;
A claw fixing portion for fixing the claw shaft;
An upright portion erected at a predetermined angle with respect to the fork fixing portion and the claw fixing portion;
With
The door opening mechanism is disposed on the front side of the standing part of the base member, and the actuator is provided on the back side of the standing part of the base member,
The door latch device according to claim 1, wherein the cover is provided with a notch portion through which the standing portion of the base member can be inserted.

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