JP4080736B2 - Electric door lock device for vehicle - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a vehicle door lock device, and more particularly to an electric door lock device that performs unlocking electrically.
[0002]
[Prior art and its problems]
In general, a vehicle door lock device including a luggage door (trunk) fixes a striker to one of a vehicle body and a vehicle door, and rotatably supports a hook and a ratchet for holding and releasing the striker. It has a general configuration. In the electric type in which unlocking is performed electrically, the ratchet is rotated in the unlocking direction by a ratchet pressing body driven by a motor.
[0003]
Conventionally, in order to transmit the force of the ratchet pressing body to the ratchet, this electric door lock device for a vehicle has separately supported a roller at an engaging portion of the ratchet with the ratchet pressing body. However, supporting a roller as a separate member on the ratchet has problems of assembly accuracy between the ratchet and the roller, an increase in the number of parts, and an increase in assembly man-hours.
[0004]
Also, even if it is electric, it is common to support an open lever on the base plate that rotates the ratchet in the unlocking direction by manual operation to enable manual unlocking. The unlocking open lever is provided independently of the ratchet pressing body, and similarly causes an increase in the number of parts and assembly man-hours.
[0005]
OBJECT OF THE INVENTION
The present invention provides a device that can simplify the structure around the ratchet and can reduce the number of parts and the number of assembling steps based on the above problem awareness of the electric door lock device for a vehicle. With the goal.
Another object of the present invention is to provide an electric door lock device that can simplify the support structure of an open lever for manual unlocking as well.
[0006]
SUMMARY OF THE INVENTION
The present invention relates to a striker fixed to one of a vehicle body and a vehicle door; a hook and a ratchet that are supported rotatably on the other of the vehicle body and the vehicle door and hold and release the striker; In the electric door lock device for a vehicle having a motor-driven ratchet pressing body that is pivoted to the ratchet, the ratchet pressing body is provided with an unlocking cam that gradually increases the distance from the center of rotation. As an engagement portion with the unlocking cam, a linear portion that faces substantially in the radial direction from the rotation center of the ratchet, and an inclined portion that is located at the tip of the linear portion and is inclined with respect to the linear portion When the lock is released, the unlocking cam changes the contact position from the inclined part of the bent piece to the linear part and unlocks it. It is characterized in that cause I. In this way, the ratchet itself is formed with the engagement portion with the ratchet pressing body as a bent piece, and when unlocking, the unlocking cam has a contact position from the inclined portion to the linear portion of the bent piece. By being configured to change , not only the roller becomes unnecessary, but there is no room for the assembly accuracy to be a problem. That is, it is possible to reduce high assembly accuracy, the number of parts, and the number of assembly steps.
[0007]
Further, in order to enable manual unlocking, an open lever for rotating the ratchet in the unlocking direction by manual operation can be pivotally mounted coaxially with the ratchet pressing body. In this aspect, the linear portion of the bent piece of the ratchet is preferably an engaging portion with this open lever.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Initially, the whole structure and operation | movement of the door lock apparatus 11 of one Embodiment of this invention are demonstrated. In this embodiment, the present invention is applied to a luggage door (trunk). As shown in FIGS. 1 and 2, a base plate 12 made of a metal material has a luggage room (vehicle body) of an automobile and a luggage door (vehicle). One of the doors) is fixed to, for example, a luggage door, and the striker 13 held and released by the door lock device 11 is fixed to, for example, a luggage room. A striker entry groove 14 is formed in the base plate 12, and a hook 17 and a ratchet 18 are pivotally attached to both sides of the striker entry groove 14 by shafts 15 and 16, respectively.
[0009]
The hook 17 includes a striker holding groove 17a, a lock engaging portion 17b, a spring hooking portion 17c, and a switch lever pressing portion 17d. The ratchet 18 includes a lock portion 18a that engages and disengages with the lock engaging portion 17b of the hook 17, a spring hook portion 18b, and a driven arm 18c. A tension spring 19 that stretches and biases the hook 17 and the ratchet 18 in a direction in which the lock engaging portion 17b and the lock portion 18a are engaged is stretched between the spring hook portions 17c and 18b. When the lock engaging portion 17b and the lock portion 18a are engaged, the striker 13 is held in the striker holding groove 17a (locked state). On the other hand, when the engagement between the lock engaging portion 17b and the lock portion 18a is released, the tension spring 19 rotates the hook 17 in the striker opening direction, and the striker 13 is released from the striker entry groove 14 (unlocked state).
[0010]
A motor housing 20 made of a synthetic resin material is fixed to the base plate 12. The motor housing 20 integrally includes a motor unit housing recess 20a, a rotating body housing recess 20b, and a rotation center shaft 20c formed protruding from the rotating body housing recess 20b. A motor unit 21 having a worm 21a fixed to the rotating shaft is inserted and fixed in the motor unit housing recess 20a. The rotation center shaft 20c extends toward the base plate 12 and has a small-diameter fitting portion 20d that fits into the support hole 12a of the base plate 12 at the tip. The motor housing 20 also has one positioning protrusion 20e corresponding to the fixing holes 12b (three in the illustrated example) of the base plate 12 and two fixing screw seats (screw holes) 20f (see FIG. 4). . The positioning protrusions 20e are fitted into the corresponding fixing holes 12b, and the fixing screws are inserted into the remaining two fixing holes 12b and the fixing screw seat 20f. Of the two fixed screw seats 20f, the one closest to the hook 17 is a joint fastening hole 12b 'and a joint fastening screw seat 20f' for the lamp terminal in the room (luggage room).
[0011]
As shown in FIGS. 2 and 3, the base plate 12 is located on one plane by bending the plate thickness plane having the striker entry groove 14 and the plate thickness plane for fixing the motor housing 20. First, the hook 17 and the ratchet 18 also have a bent shape corresponding to the bent shape of the base plate 12, but the bent shape of the hook 17 and the ratchet 18 is omitted in the drawing for the sake of simplicity. I'm drawing.
[0012]
A cam-integrated worm wheel (ratchet pressing body, rotating cam body) 22 and an open lever 23 that are positioned in the rotating body housing recess 20b and an open lever 23 are coaxially fitted to the rotation center shaft 20c of the motor housing 20 so as to be relatively rotatable. ing. As shown in FIGS. 6 and 7, the cam-integrated worm wheel 22 is centered on a center hole 22 a that receives the rotation center shaft 20 c of the motor housing 20 in a relatively rotatable manner and a center hole 22 a that meshes with the worm 21 a of the motor unit 21. The worm wheel 22b and the unlock cam 22c that gradually increases the distance from the center hole 22a are integrally provided.
[0013]
The open lever 23 includes a fulcrum hole 23a that receives the rotation center shaft 20c of the motor housing 20 in a relatively rotatable manner, a lock release arm 23b, a wire hooking arm 23c, and a rod coupling arm 23d. A wire 24 that is pulled in conjunction with a pull lever in the vehicle compartment is connected to the wire hanging arm 23c, and a rod (not shown) that is pulled in conjunction with a key device is connected to the rod coupling arm 23d.
[0014]
The unlock cam 22c of the cam-integrated worm wheel 22 and the unlock arm 23b of the open lever 23 are respectively connected to an engaging portion 18d provided as a bent piece (cut-and-raised piece) at the tip of the driven arm 18c of the ratchet 18. Disengage. More specifically, the engaging portion 18d includes a linear portion 18d1 pressed by the unlocking cam 22c of the cam-integrated worm wheel 22 or the unlocking arm 23b of the open lever 23, and an inclined portion pressed by the unlocking cam 22c. 18d2. When the open lever 23 is rotated in the clockwise direction in FIG. 1 via the wire hooking arm 23c (pull lever) or the rod coupling arm 23d (key device), the straight portion 18d1 is centered on the shaft 16 by the unlocking arm 23b. Is pushed counterclockwise in FIG.
[0015]
A compression spring 25 is inserted between the bent piece 12c of the base plate 12 and the wire hooking arm 23c, and constantly urges the open lever 23 in the returning direction in which the unlocking arm 23b is separated from the driven arm 18c. . The return position of the open lever 23 is regulated by a stopper (not shown). Further, between the cam-integrated worm wheel 22 and the motor housing 20, a torsion spring 22d (shown in FIGS. 6 and 7) having a coil portion centered on the center hole 22a is latched, so that the cam-integrated worm The wheel 22 is urged to rotate counterclockwise in FIGS. Kaidotan in the counterclockwise direction of the cam piece worm wheel 22, the lock release cam 22c are regulated at the position in contact with the stopper wall 20t of the motor housing 20 (FIG. 6), in the turning end Unlocked The cam 22c is in a non-engagement position with the engagement portion 18d of the ratchet 18.
[0016]
The engaging portion 18d of the ratchet 18 is energized to the motor unit 21 by, for example, a remote control unlocking signal, and when the worm wheel 22b is rotated clockwise through the worm 21a, the worm wheel 22b is integrated with the worm wheel 22b. It is pressed in the same direction by the lock release cam 22c (FIGS. 8A, 8B, and 8C).
[0017]
Regardless of whether the cam-integrated worm wheel 22 or the open lever 23 is used, when the ratchet 18 rotates counterclockwise about the shaft 16 of FIGS. 1 and 8, the lock portion 18a and the lock engaging portion 17b The engagement is released, the striker 13 is released from the striker holding groove 17a, and the lock is released.
[0018]
As shown in FIGS. 9 to 12, a motor drive plus (+) terminal 30 and a minus (−) terminal 31 for energizing the motor unit 21 and an indoor lamp plus terminal 32 are insert-molded in the motor housing 20. Yes. The motor drive plus terminal 30 and the motor drive minus terminal 31 protrude into the motor unit housing recess 20a, respectively, and are inserted into the electrode recesses 21b and 21c (FIG. 2) of the motor unit 21 and are electrically connected to the motor side terminals 30a and 31a. Connection terminals 30 b and 31 b projecting into a male socket 20 s provided integrally with the motor housing 20 are provided. The motor drive minus terminal 31 is also provided with an indoor lamp (minus) extension terminal 31c, and the end of the indoor lamp extension terminal 31c matches the position of the co-tightening screw seat 20f 'of the motor housing 20. A round hole terminal 31d is formed. The round hole terminal 31d is exposed on the surface of the motor housing 20 on the base plate 12 side.
[0019]
Between the joint fastening hole 12b ′ of the base plate 12 and the joint fastening screw seat 20f ′ of the motor housing 20, an indoor lamp movable negative (−) terminal 33 is electrically connected and fixed to the motor drive negative terminal 31. . That is, the indoor lamp movable minus terminal 33 includes a round hole terminal 33a corresponding to the round hole terminal 31d of the motor drive minus terminal 31, and an elastically deformable switch arm 33b extending from the round hole terminal 33a in the hook 17 direction. In the state where the round hole terminal 31d and the round hole terminal 33a are in contact with each other, a fixing screw 34 (FIG. 12) is inserted between the joint fastening hole 12b ′ and the joint fastening screw seat 20f ′. It is tightened. The motor driving minus terminal 31 and the indoor lamp operating minus terminal 33 are electrically connected to the base plate 12 and grounded through the fixing screw 34 and the round hole terminals 33a and 31d. As shown in FIG. 4, the movable minus terminal 33 is fitted into the swing range regulating groove 20g of the motor housing 20, and the base portion of the switch arm 33b is fitted between the regulating projections 20h and 20i so as not to rotate. The position is restricted. The swing range regulating groove 20g and the regulating projections 20h and 20i are effective for temporarily fixing the movable minus terminal 33 to the motor housing 20 before being fixed to the base plate 12.
[0020]
The switch arm 33 b of the indoor lamp movable negative terminal 33 extends toward the switch lever pressing portion 17 d of the hook 17. As described above, the hook 17 rotates about the shaft 15 in response to the locking and unlocking of the vehicle door. When the hook 17 is in the locked position, the switch arm 33b is connected to the round hole terminal 33a via the switch lever pressing portion 17d. It is elastically deformed around the center and free when it is in the unlocked position.
[0021]
The above-described indoor lamp positive terminal 32 insert-molded in the motor housing 20 has a connection terminal 32a at one end extending into the male socket 20s of the motor housing 20, and a detection terminal 32b at the other end being used for the indoor lamp. The movable minus terminal 33 is extended to a fixed position in contact with and away from the switch arm 33b. The switch arm 33b contacts the detection terminal 32b in a free state (the unlocked position of the hook 17) (FIG. 11), and elastically deforms to a non-contact position with the detection terminal 32b when the hook 17 is in the locked position (FIG. 11). FIG. 10).
[0022]
A female socket (not shown) is inserted into the male socket 20s of the motor housing 20, and a power supply circuit to the motor unit 21 is connected between the connection terminals 30b and 31b. In addition, a lighting circuit for the in-room (luggage room) lamp 35 is formed between the connection terminals 32a and 31b (FIGS. 10 and 11).
[0023]
In the lock device having the above-described configuration, the lock lever 17b of the hook 17 and the lock portion 18a of the ratchet 18 are engaged, and the open lever 23 is in the locked state (FIG. 1) in which the striker 13 is held in the striker holding groove 17a. 1 is rotated clockwise through the pull lever (wire hooking arm 23c) or the key device (rod coupling arm 23d), the unlocking arm 23b moves the linear portion 18d1 of the engaging portion 18d of the ratchet 18 together. Press in the same direction. Then, the engagement between the lock portion 18a and the lock engaging portion 17b is released, and the striker 13 is released from the striker holding groove 17a, and the lock is released. When the unlocking power for the open lever 23 is released, the lever 23 returns to the initial position by the force of the compression spring 25.
[0024]
In the locked state, for example, when the motor unit 21 is energized by a remote control unlocking signal and the worm 21a rotates, the worm wheel 22b rotates in the clockwise direction in FIGS. 1 and 8 against the torsion spring 22d. Then, the engaging portion 18d of the ratchet 18 is pressed in the same direction by the lock release cam 22c. Therefore, similarly, the lock is released.
[0025]
In the locked state where the striker 13 is held in the striker holding groove 17a of the hook 17, the switch lever pressing portion 17d of the hook 17 presses the switch arm 33b of the indoor lamp movable negative terminal 33 as shown in FIG. Thus, the indoor lamp plus terminal 32 is separated from the detection terminal 32b. For this reason, the indoor lamp 35 is not energized and does not light up. On the other hand, in the unlocked state in which the hook 17 opens the striker 13, as shown in FIG. 11, the switch lever pressing portion 17d moves away from the switch arm 33b to free the switch arm 33b. For this reason, as a result of the switch arm 33b and the detection terminal 32b coming into contact with each other and energizing the indoor lamp 35, the indoor lamp 35 is turned on.
[0026]
Next, features of the present invention will be described. The ratchet 18 shown in the above embodiment has an engaging portion 18d formed of a bent piece at the tip of the drive arm 18c. The engaging portion 18d includes a linear (engaging) portion 18d1 that is directed in a radial direction from the rotation center (shaft 16) of the ratchet 18, and an inclined (engaging) portion 18d2 that follows the tip portion of the linear portion 18d1. The linear portion 18d1 and the inclined portion 18d2 are connected by a smooth surface. When the linear portion 18d1 and the inclined portion 18d2 are pressed by the unlocking cam 22c (cam which gradually increases the distance from the rotation center) of the cam-integrated worm wheel 22, the inclined portion 18d2 is first pressed and then The linear portion 18d1 is pressed. The unlocking arm 23b of the open lever 23 presses the linear portion 18d1.
[0027]
As described above, the engagement portion of the ratchet 18 with the unlocking cam 22c (cam-integrated worm wheel 22) is an engagement portion 18d formed as a bent piece on the ratchet 18 itself. The engaging roller which was pivotally attached becomes unnecessary. The assembly accuracy between the ratchet 18 and the cam-integrated worm wheel 22 can be ensured by the positional accuracy of the shaft 16 and the support hole 12a of the base plate 12 (the rotation center shaft 20c of the motor housing 20). Since the holes 12a are both formed on the base plate 12, the positional accuracy can be easily ensured.
[0028]
Further, an open lever 23 for manual unlocking is supported on the rotation center shaft 20c of the cam-integrated worm wheel 22 so as to be relatively rotatable coaxially, and the cut-and-engage engagement portion 18d of the ratchet 18 is connected to the open lever 23. By providing the linear portion 18d1 as the engaging portion, the number of parts can be reduced and the number of assembling steps can be reduced.
[0029]
In the above embodiment has exemplified the cam integral worm wheel 22 as the ratchet pushing member, the present invention is specifically mechanism for giving a rotational force to the ratchet pressing member is not limited.
[0030]
【The invention's effect】
According to the present invention, in the electric door lock device for a vehicle , the ratchet pressing body is provided with the lock release cam that gradually increases the distance from the rotation center thereof, while the ratchet is engaged with the lock release cam. As a joint portion, a bent piece having a linear portion that faces substantially in the radial direction from the rotation center of the ratchet and an inclined portion that is located at the tip of the linear portion and is inclined with respect to the linear portion is formed. In the unlocking operation, the unlocking cam is configured to change the contact position from the inclined portion of the bent piece to the linear portion to perform the unlocking operation, so that the configuration around the ratchet can be configured more easily. In addition, high assembly accuracy, the number of parts and the number of assembly steps can be reduced. Also, by the engaging portion of the open lever for linear portion man unlocking a part of the same ratchet bent piece may support structure likewise simplified open lever.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a vehicle door lock device according to the present invention.
FIG. 2 is an exploded perspective view of the same.
FIG. 3 is a longitudinal sectional view of the same.
FIG. 4 is a rear view of the motor housing.
FIG. 5 is a cross-sectional view taken along line VV in FIG.
FIG. 6 is a rear view of a single cam integrated worm wheel. .
7 is a cross-sectional view taken along line VII-VII in FIG.
FIGS. 8A, 8B, and 8C are front views showing the unlocking operation by the cam-integrated worm wheel. FIGS.
FIG. 9 is a perspective view showing a wiring structure provided in the motor housing.
FIG. 10 is a diagram showing an off state of an indoor lamp lighting circuit according to the same wiring structure;
FIG. 11 is a diagram showing the ON state.
12 is a cross-sectional view taken along line XII-XII in FIG.
[Explanation of symbols]
11 Door lock device 12 Base plate 12a Support hole 12b Fixing hole 12b 'Joint tightening hole 13 Striker 14 Striker entry groove 15 16 Shaft 17 Hook 17a Striker holding groove 17b Lock engaging part 17c Spring hook part 17d Switch lever pressing part 18 Ratchet 18a Lock Portion 18b spring hook portion 18c driven arm 18d engagement portion 18d1 linear portion 18d2 inclined portion 19 tension spring 20 motor housing 20a motor unit storage recess 20b rotating body storage recess 20c rotation center shaft 20d small diameter fitting portion 20f fixed screw seat 20f 'Screwed screw seat 20s Male socket 21 Motor unit 21a Worm 21b 21c Electrode recess 22 Cam integrated worm wheel (ratchet pressing body)
22a Center hole 22b Worm wheel 22c Unlocking cam 22d Torsion spring 23 Open lever 23a Support hole 23b Unlocking arm 23c Wire hooking arm 23d Rod coupling arm 24 Wire 25 Compression spring 30 Motor drive plus terminal 31 Motor drive minus terminal 30a 31a Motor side Terminal 30b 31b Connection terminal 31c Indoor lamp extension terminal 31d Round hole terminal 32 Indoor lamp positive terminal 32a Connection terminal 32b Detection terminal 33 Indoor lamp movable negative terminal 33a Round hole terminal 33b Switch arm 34 Fixing screw 35 Indoor lamp

Claims (2)

A striker fixed to either the vehicle body or the vehicle door;
A hook and a ratchet, which are rotatably supported on the other of the vehicle body and the vehicle door, for gripping and releasing the striker;
A motor-driven ratchet pressing body for rotating the ratchet in the unlocking direction;
In an electric door lock device for a vehicle having
The ratchet pressing body has a lock release cam that gradually increases the distance from the center of rotation,
As the engagement portion of the ratchet with the unlocking cam of the ratchet pressing body, a linear portion facing the radial direction from the rotation center of the ratchet, and the linear portion located at the tip of the linear portion An electric door lock device for a vehicle , wherein a bent piece having an inclined portion inclined with respect to the inner surface is formed, and the unlocking cam changes the contact position from the inclined portion to the linear portion when unlocked. . 2. The door lock device according to claim 1, wherein an open lever for rotating the ratchet in the unlocking direction by a manual operation is coaxially supported by the ratchet pressing body and freely supported for relative rotation with the ratchet pressing body. An electric door lock device for a vehicle in which the linear portion of the bent piece of the ratchet constitutes an engaging portion with the open lever.

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