JP3367904B2 - Vehicle door latch device for power closing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door latch device.

[0002]

2. Description of the Related Art Conventionally, many publications disclose a door latch device having a so-called one-motion door opening mechanism capable of both opening the door and releasing the locked state by a single door opening operation from the inside of the vehicle in the locked state. It is known and, for example, in Japanese Patent Laid-Open No. 58-150673, a latch rotatable by a contact with a striker fixed to a vehicle body from a door open position to a full latch position via a half latch position, A ratchet that engages with a latch to prevent the latch from returning from the half-latch position or the full-latch position to the open door position, an open lever connected to an outer open handle of a vehicle door, and an open lever of the open lever. In the unlocked state where the ratchet can be disengaged from the latch by rotation and when the open lever rotates, the ratchet is released. Has a lock mechanism that switches to a locked state in which the ratchet cannot be disengaged from the latch, and an inner lever that is coupled to an inner open handle of the vehicle door and that disengages the ratchet from the latch regardless of the state of the lock mechanism when rotated. However, the vehicle door latch device is described in which the lock mechanism returns to the unlocked state when the inner lever rotates in the locked state. Further, conventionally, a door latch device provided with a power closing mechanism for displacing a vehicle door in an incompletely closed position (half-latch position) to a completely closed position (full-latch position) by the power of a motor is also described in many publications and known. For example, in Japanese Patent Laid-Open No. 2-200982,
A latch rotatable by contact with a striker fixed to the vehicle body from a door open position to a full latch position via a half latch position, and by engaging with the latch, the latch is in the half latch position or the full latch position. From the ratchet to prevent returning to the open position from the,
An open lever connected to an outer open handle of a vehicle door, an unlocked state in which the ratchet can be disengaged from the latch by rotation of the open lever, and a lock in which the ratchet cannot be disengaged from the latch by rotation of the open lever. A lock mechanism that switches to a state, and an inner lever that is connected to an inner open handle of the vehicle door to rotate the open lever when rotated, and the latch is rotated by the power of a power closing unit equipped with a motor. A vehicle door latch device for power closing is described in which a power lever associated with a power lever capable of rotating the latch in the half latch position to the full latch position is associated.

[0003]

Among the above-mentioned publicly known examples,
With the door latch device equipped with the one-motion door opening mechanism,
The open lever rotates when the outer open handle is opened, but does not rotate when the inner open handle is opened. This is because in the one-motion door opening mechanism, the operating force of the inner open handle is transmitted to the ratchet without going through the lock mechanism, so that the door can be opened even when the lock mechanism is in the locked state. Further, in the door latch device including the power closing mechanism, a safety mechanism capable of stopping the power closing mechanism is provided in consideration of safety during the closing operation by power. The safety mechanism is provided with a cancel lever that cuts off the power transmission path inside the power close unit to free the power lever, and the cancel lever is configured to operate by rotation of the open lever. Therefore, if the power closing mechanism is added to the door latch device equipped with the one-motion door opening mechanism, the safety mechanism of the power closing mechanism becomes effective only when the outer open handle is operated, and the power closing door is stopped when the inner open handle is operated. There was a disadvantage that I couldn't do it.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a latch 16 which is rotatable from an open position to a full latch position via a half latch position by contact with a striker 6 fixed to a vehicle body, and the latch. A ratchet 18 which engages with 16 to prevent the latch 16 from returning from the half-latch or full-latch position to the open door position, and an outer open handle 34 for the vehicle door 2.
Open lever 32 connected to the open lever 32, and an unlocked state in which the ratchet 18 can be disengaged from the latch 16 by rotation of the open lever 32 and the open lever 3.
When the ratchet 18 is connected to the inner open handle 36 of the vehicle door 2 when rotated, the ratchet 18 is locked regardless of the state of the lock mechanism. An inner lever 38 for disengaging the latch 16 from the latch 16, and the lock mechanism returns to the unlocked state when the inner lever 38 rotates in the locked state. A wire lever 58, which can rotate the latch 16 in the half-latched position to the full-latch position when rotated by the power of the power-closed unit 8 provided, is associated with the power-closed unit 8. The power transmission path is cut off and the wire lever 58 is closed. A cancel lever 96 for connecting the cancel lever 96 to the open lever 32 and disconnecting the power transmission path by the rotation of the open lever 32. The vehicle door latch device for a power closing door is configured so as to be able to rotate even when it is rotated.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the inner surface of a typical swing opening / closing type vehicle door 2 to which a door latch device 1 according to the embodiment of the present invention is attached. There is. The door 2 is generally composed of a metal outer plate 3, a metal inner plate 4, and a window glass 5. The latch device 1 includes a striker 6 fixed to a vehicle body (not shown).
A latch unit 7 that keeps the door 2 in a closed state by engaging with the door 2 and a power closing unit 8 that supplies power to the latch unit 7 for completely closing the door. The latch unit 7 is fixed to the metal rear plate 9 that bridges the outer plate 3 and the rear end of the inner plate 4 with bolts or the like. The latch unit 7 and the power closing unit 8 are the power wire 1 for power transmission.
0 and the safety wire 11 for transmitting the door opening operation force of the latch unit 7 to the power closing unit 8.
Although the details will be described later, the power closing unit 8 includes the door 2
Is manually closed to a predetermined position (half-latch position), power is sent to the latch unit 7, and the latch unit 7 uses the power to move the door 2 to the full-latch position to completely close the door 2. Let Reference numeral 12 is a glass rail that slidably holds both sides of the window glass 5.

FIG. 3 shows the front surface of the latch unit 7, FIG. 4 shows its back surface, FIG. 5 shows its longitudinal section, and FIG. 6 shows its left side surface. Since the front surface of the latch unit 7 is attached to the door 2 so that the front surface of the latch unit 7 contacts the rear plate 9, the front surface of the latch unit 7 faces rearward with respect to the vehicle body. However, in the following description, Unless otherwise specified, the front side of the latch unit 7 is the front side.

3 to 6, the latch unit 7 is shown.
The latch body 13 is made of synthetic resin and is long in the vertical direction as a whole, and a wide concave portion 14 is formed on the front side thereof except the upper portion. A latch 16 having a U-shaped groove 15 is provided in the recess 14 by a latch shaft 17 and a ratchet 1
8 is rotatably attached by a ratchet shaft 19.
The latch 16 is biased in the clockwise direction in FIG. 2 by the elastic force of the spring 20, and the ratchet 18 is biased in the counterclockwise direction by the elastic force of the spring 21 and is in contact with the outer peripheral surface of the latch 16. When the door 2 is moved in the closing direction, the striker 6 fixed to the vehicle body enters into the horizontal guide groove 22 formed in the latch body 13 and enters the U-shaped groove 1 of the latch 16.
5, the latch 16 is rotated counterclockwise, and the latch 16
When is rotated to the half-latch position, the ratchet 18 is engaged with the half-latch step 23 of the latch 16 by the elasticity of the spring 21, and when the latch 16 is rotated to the full-latch position,
The ratchet 18 engages with the full-latch step portion 24 of the latch 16, so that the door 2 is completely closed. Reference numeral 25 denotes a rear bulge portion formed on the latch body 13 for partitioning the guide groove 22.

A metal cover plate 26 is fixed to the front surface of the latch body 13 so as to close the recess 14, and a support plate 27 extending downward is provided below the cover plate 26. Bending part 28
The fixture 29 of the power wire 10 is engaged and fixed to.

A metal back plate 30 is provided on the back side of the latch body 13 so as to be in contact with the latch body 13, and a metal bracket 31 is attached to the back plate 30 at a predetermined interval. To be An open lever 32 for disengaging the ratchet 18 from the latch 16 and a lock lever 33 for switching the latch unit 7 between a locked state and an unlocked state are provided between the back plate 30 and the bracket 31. The open lever 32 is the ratchet shaft 1 described above.
9, the left arm 32A of the open lever 32 has a rod 35 extending to the outside open handle 34 of the door 2.
Are connected with lost motion.

The interior side (the right side in FIG. 4) of the back plate 30 is bent at a substantially right angle in the direction away from the latch body 13 to form a sub plate 30A. The sub plate 30A has an open handle inside the door 2. Three
Inner lever 38 connected to wire 37 up to 6
To support.

The lock lever 33 is pivotally supported on the bracket 31 (and / or the back plate 30) by a lock shaft 39, and its left end is connected to a key cylinder 40 of the door 2 via a wire or a rod 41. . A pin 42 (FIG. 6) protruding rearward is provided at the other end of the lock lever 33. The sub plate 30A includes:
The motor type actuator 43 is fixed, an output lever 45 is attached to the output shaft 44 of the actuator 43, and the pin 42 is connected to the output lever 45. Further, a wire 47 reaching the inner lock button 46 of the door 2 is locked to the output lever 45.

A lock link 48 is bridged between the lock lever 33 and the open lever 32, and a lock pin 48 is slidably engaged with an elongated hole 49 formed in the open lever 32 above the lock link 48. 50 is formed, and the lower portion of the lock link 48 is pivotally supported by the lock lever 33 by a shaft 51.

As shown in FIG. 5, a ratchet lever 52 is pivotally supported on the ratchet shaft 19, and the ratchet lever 5
The left arm 52A (FIGS. 7 and 8) of the second ratchet 1
A ratchet pin 53 protruding from the rear side of the latch body 13 from 8 is engaged. The right arm 52B of the ratchet lever 52 extends rightward so as to face the rotation path of the inner lever 38, and the inner open handle 36
When the inner lever 38 is rotated by the door opening operation, the ratchet lever 52 is engaged with this and the ratchet lever 52 rotates counterclockwise. When the ratchet lever 52 rotates counterclockwise,
The ratchet 18 rotates via the ratchet pin 53 and is disengaged from the latch 16, so that the door 2 is opened.

The lock lever 33 is, as is well known,
The lock link 48 is switched between the unlock position (FIG. 7) and the lock position (FIG. 8) by rotating the key cylinder 40, the actuator 43, and the lock button 46. As shown in FIG. 7, the lock link 48
When the lock pin 50 is in the unlock position, the lock pin 50 is moved downward in the elongated hole 49 to face the contact arm 54 of the ratchet lever 52. In this state, when the open lever 32 rotates counterclockwise by the operation of opening the outer open handle 34, the lock pin 50 causes the contact arm 54 to move.
And the ratchet lever 52 is rotated counterclockwise, the door 2 is opened.

When the lock lever 33 of FIG. 7 is rotated clockwise, the lock pin 50 of the lock link 48 moves upward and is displaced to the lock position separated from the contact arm 54 as shown in FIG. In the state of FIG. 8, since the lock pin 50 is separated from the contact arm 54, the open lever 3
The door cannot be opened by the counterclockwise rotation of 2, and therefore the opening operation of the outer open handle 34 is invalid. However, in the state of FIG. 8, when the inner lever 38 is rotated by the door opening operation of the inner open handle 36, as described above, the inner lever 38 directly abuts the right arm 52B of the ratchet lever 52 and the ratchet lever. Since 52 is rotated counterclockwise, the door is opened even if the lock pin 50 is in the lock position.

On the left side of the lock pin 50 of the lock link 48, there is formed a canceling portion 55 protruding upward in one shape. The canceling portion 55 is arranged on the same plane as the left arm 52A of the ratchet lever 52. In the unlocked state of FIG. 7, the cancel portion 55 is separated from the lower surface of the left arm 52A of the ratchet lever 52 by a predetermined distance, and even if the ratchet lever 52 rotates counterclockwise by the door-opening operation, the left arm 52A remains open. It does not come into contact with the cancel portion 55. However, when the lock link 48 is switched to the lock position, the canceling portion 55 moves upward and approaches the lower surface of the left arm 52A, as shown in FIG. Therefore, as described above, when the ratchet lever 52 is rotated counterclockwise through the inner lever 38 by the door opening operation of the inner open handle 36 in the locked state to open the door 2, at the same time, the left arm 52A is opened. Comes into contact with the canceling portion 55 and the lock link 48
To move the lock pin 50 to the unlock position. Therefore, by rotating the ratchet lever 52, the door 2 can be opened and the locked state can be released by one operation.

Right arm 32B of the open lever 32
Is extended to the right so as to overlap with the right arm 52B of the ratchet lever 52 so as to face the rotation trajectory of the inner lever 38, and when the inner lever 38 is rotated by the opening operation of the inner open handle 36, The open lever 32 is configured to rotate counterclockwise by engaging with this. As described above, the rotation of the inner lever 38 directly rotates the ratchet lever 52 to open the door 2, and the rotation of the ratchet lever 52 releases the locked state (one-motion opening configuration). Although widely known from the above, a configuration in which both the open lever 32 and the ratchet lever 52 rotate by the rotation of the inner lever 38 is novel, and this configuration is important in relation to a safety mechanism for the power closing unit 8 described later. Has a great effect.

The upper portion of the latch body 13 is shown in FIG.
5, a storage space 56 that is not in direct communication with the recess 14 is formed. The storage space 56 includes the cover plate 26 and the back plate 30.
A wire shaft 57 supported by and is housed therein, and a wire lever 58 located on the back side of the back plate 30 is rotatably supported at the rear end of the wire shaft 57. The wire lever 58 of the embodiment is formed by stacking two plates, and a wire groove 59 into which the power wire 10 is fitted is provided at the outer peripheral edge thereof, and the cable end 60 of the power wire 10 is a wire lever. It is locked to 58.
On the outer periphery of the wire shaft 57, the main body is accommodated in the storage space 56.
Wind the spring 61 so that it fits inside. One end of the spring 61 is brought into contact with the latch body 13 and the other end is locked to the wire lever 58, and the elasticity of the spring 61 causes the wire lever 58 to move.
Is urged clockwise in FIG. When the power wire 10 is pulled by the operation of the power closing unit 8, the wire lever 58 rotates counterclockwise in FIG. 4, and when the operation of the power closing unit 8 is stopped and the power wire 10 becomes free, the spring 61 is released. Figure 4 by the elasticity of
Return to the initial position of.

The rear end of the latch shaft 17 extends rearward through the bottom wall 62 of the latch body 13 and the back plate 30, as shown in FIG.
Is crimped to. The base of the switch lever 63 is rotatably attached to the latch shaft 17 between the back plate 30 and the bracket 31. On the rotation end side of the switch lever 63, the latch body 13 is penetrated from the outer peripheral portion of the latch 16 through the circular arc slot 64 of the latch body 13.
The end portion of the latch pin 65 projecting to the back side of is latched, and the switch lever 63 is configured to rotate integrally with the latch 16 by the connection by the latch pin 65. The spring 20 is arranged between the back plate 30 and the bracket 31, and biases the switch lever 63 in the counterclockwise direction in FIG. 4 to bias the latch 16 in the clockwise direction in FIG. To do.

An unlatched position (door opening position) of the latch 16 is provided at the upper portion on the back side of the latch body 13.
A switch body 66 for detecting the half-latch position and the full-latch position is provided, but the switch body 66 does not interfere with the glass rail 12 and the latch body 1 is provided.
Mounted in the 3 corners. That is, the glass rail 12
When the latch unit 7 is attached to the door 2,
As shown in FIG. 2, the latch unit 7 is located at the center of the rear side of the latch unit 7, and in the embodiment of FIG. 5, both the latch shaft 17 and the ratchet shaft 19 are substantially at the center of the latch unit 7. The glass rail 12 can be regarded as facing the line connecting the latch shaft 17 and the ratchet shaft 19 because the glass rail 12 is disposed at the position. Therefore, it is desired that the thickness of this portion of the latch unit 7 in the front-rear direction is made as thin as possible. Therefore, in this embodiment, the switch body 66 is attached to the side of the latch body 13 so as not to overlap the glass rail 12 in the front-back direction of the latch unit 7. Further, the switch body 66 is designed not to overlap with the wire lever 58 in the front-rear direction even when the wire lever 58 rotates.

The latch unit 7 in FIG. 4 shows the door open state. When the door 2 is manually moved in the door closing direction and the latch 16 is rotated by the engagement with the striker 6,
The switch lever 63 interlocking with the latch 16 is shown in FIG.
When the latch 16 rotates clockwise from the door open position to the half-latch position, the convex portion 67 of the switch lever 63 contacts the contact arm 68 of the switch body 66 to turn on the switch body 66, and the latch 16 is fully latched. When it exceeds the position and rotates a little, the convex portion 67 causes the contact arm 68 to move.
And the switch body 66 is turned off. The position of the latch 16 is monitored by turning on / off the switch body 66, and the power closing unit 8 moves the latch 16 from the door open position to the half-latch position to switch the switch body 66.
Is turned on, and when the latch 16 passes the full latch position and the switch body 66 is turned off, the operation is stopped.

When the latch 16 moves from the open position to the half-latch position by manually closing the door, the latch pin 65 is released.
Moves from the solid line position in FIG. 4 to the virtual position. The latch pin 65 at this virtual position faces the rotation trajectory of the pressing surface 69 of the wire lever 58. Therefore, when the power closing unit 8 is actuated by the displacement of the latch 16 to the half-latch position and the wire lever 58 rotates counterclockwise in FIG. 4, the pressing surface 69 contacts the latch pin 65 (see FIG. 9), When the wire lever 58 further rotates,
As shown in FIG. 10, the latch 16 is displaced to the full latch position,
The door 2 is completely closed. Therefore, when the closing force of the door 2 is weak and the door 2 is not completely closed,
That is, even if the door 2 stops in the half-latch state, it is not necessary to close the door 2 again. The power closing unit 8 does not stop operating in the state shown in FIG.
When the latch 16 excessively rotates and the switch body 66 is turned off, the operation is stopped.

In this embodiment, considerable effort is made to reduce the thickness of the upper portion of the latch unit 7 to which the wire lever 58 is attached as much as possible. The first is that a spring 61 for returning the wire lever 58 rotated by pulling the power wire 10 to the initial position is housed in the housing space 56. Storage space 56
Since the latch body 13 is formed by utilizing its thickness, the spring 61 can be attached without increasing the thickness of the latch unit 7. Second is the latch body 1
That is, the thickness itself on the upper side of 3 is thin. In the latch body 13 of the present embodiment, the depth of the recess 14 for accommodating the latch 16 and the like is the same as the conventional one, but the thickness of the bottom wall 62 forming the bottom surface of the recess 14 is smaller than that of the conventional one. It is thin. Since the bottom wall 62 of this embodiment does not accommodate a spring or the like therein, the bottom wall 62 can be thinned to a thickness that can ensure the strength of the latch body 13. Thirdly, the convex portion is not formed on the back surface of the bottom wall 62 above the rear bulging portion 25, and the switch body 66 is arranged at a position where it does not overlap with the rotation locus of the wire lever 58 in the front-back direction. is there. Therefore, the wire lever 58 can be brought close to the back surface of the latch body 13 (back plate 30) so as to be in contact therewith. As a result, the thickness of the upper portion of the latch unit 7, especially between the cover plate 26 and the wire lever 58 can be reduced. Therefore, as shown in FIGS. 5 and 11, on the glass rail 12 fixed to the door 2 in a state where the upper part is inclined rearward with respect to the door 2,
Even if the lower side of the latch unit 7 is placed in contact with
The upper side of the latch unit 7 does not interfere with the glass rail 12, and therefore the degree of freedom in installing the glass rail 12 is increased.

In FIG. 4, the upper end of a safety link 71 is pivotally supported by a pin 70 on the left arm 32A of the open lever 32, and the lower end of the safety link 71 is pivotally supported by one end of a safety lever 73 by a shaft 72. Safety lever 73 is shaft 7
4 is pivotally supported on the bracket 31. A bent portion 75 is formed at the lower end of the bracket 31, and the fixture 76 of the safety wire 11 is engaged and fixed to the bent portion 75, and the cable end 77 of the safety wire 11 is engaged with the other end of the safety lever 73. Stop it. With this configuration, when the open lever 32 is rotated by operating either the outer open handle 34 or the inner open handle 36, the safety link 7
The safety wire 11 is pulled via the safety lever 73 and the safety lever 73. When the safety wire 11 is pulled, the power wire 10 is pulled by the power closing unit 8.
Becomes a free state, and the closing of the door 2 can be stopped. This is the safety mechanism, and the safety mechanism operates by rotation of the open lever 32. Open lever 3
The reason why the second right arm 32B is configured to be engageable with the inner lever 38 is that the open lever 32 can be rotated by the inner open handle 36.

Next, the structure of the power closing unit 8 will be described with reference to FIGS. The base plate 78 of the power closing unit 8 is fixed to a position in the vicinity of the latch unit 7 at a position below the inner space of the door 2, and more preferably, it is arranged below the lower limit position of the window glass 5 of the door 2. Let A substantially fan-shaped output member 79 is rotatably attached to the base plate 78 by a support shaft 80, and a gear portion 83 with which a gear 82 of a motor portion 81 meshes is formed on the outer peripheral portion of the output member 79. A winch lever 84 is rotatably attached to the support shaft 80 so as to overlap with the output member 79. One end of the winch lever 84 is formed in a fan shape around the support shaft 80, and the wire groove 8 around which the power wire 10 is wound is formed on the outer peripheral edge thereof.
5 is formed.

The winch lever 84 and the output member 7
9, a slot 86 through which the support shaft 80 passes.
Is provided with a connecting member 87. A connecting pin 88 protruding from both sides of the connecting member 87 is fixed to the tip of the connecting member 87. The output member 79 is provided with a U-shaped engagement groove 89 capable of engaging with the connecting pin 88, and the winch lever 84 is provided at the other end with a slot 90 with which the other connecting pin 88 is engaged. A spring 93 is provided between the protrusion 91 of the connecting member 87 and the protrusion 92 of the winch lever 84, and the connecting pin 88 of the connecting member 87 is urged by the elastic force of the spring 93 in the direction of approaching the support shaft 80. The engagement between 88 and the engagement groove 89 of the output member 79 is maintained. The winch lever 84 is
When the power wire 10 is pulled by the elasticity of the spring 61 of the latch unit 7, it is urged in the counterclockwise direction in FIG.

The output member 79 is in the position shown in FIG. 12 when the motor portion 81 is inactive (standby state),
In this state, when the latch 16 shifts from the door open position to the half-latch position and the switch body 66 detects the half-latch state, the motor portion 81 operates to rotate the output member 79 clockwise. Then, since the engaging groove 89 of the output member 79 is engaged with the connecting pin 88 of the connecting member 87, the connecting member 87 also rotates clockwise, and the connecting pin 88 engages with the slot 90 of the winch lever 84. Thereby, the winch lever 84 also rotates clockwise, the power wire 10 is wound up, and the wire lever 58 of the latch unit 7 is rotated counterclockwise in FIG. As a result, as described above, the pressing surface 69 of the wire lever 58 contacts the latch pin 65,
When the wire lever 58 further rotates, the latch 16 is displaced to the full latch position by power, and the door 2 is completely closed.

The base plate 78 has shafts 94 and 95.
Thus, the cancel lever 96 and the intermediate lever 97 are pivotally supported. The first arm 98 of the cancel lever 96 and the intermediate lever 97 are connected by a pin 99, and the intermediate lever 97
At this point, the cable end 100 of the safety wire 11 is locked. The cancel lever 96, which is connected to the safety wire 11 via the intermediate lever 97, pulls the safety wire 11 around the shaft 94 when the open lever 32 rotates by the door opening operation of the outer open handle 34 or the inner open handle 36. Rotate clockwise.

Second arm 1 of the cancel lever 96
01 is disposed so as to overlap with the output member 79,
The second arm 101 has an arc slot 102 formed around the shaft 94, and the support shaft 80 is inserted into the arc slot 102. The rotation range of the cancel lever 96 is defined by the play width between the slot 102 and the support shaft 80. The second arm 101 is in the position shown in FIG. 12 when the open handles 34, 36 are not operated, and the second arm 101 is substantially overlapped with the output member 79 except for the portion near the shaft 94. is doing. The side surface of the second arm 101 has an arc-shaped cancel cam surface 103.
And the cancel cam surface 103 moves in a direction away from the support shaft 80 when the safety wire 11 is pulled by the rotation of the open lever 32. Therefore, the output member 7
When 9 is rotated by the power of the motor unit 81, the outer open handle 34 or the inner open handle 3
When any one of 6 is operated to open the door, the open lever 32 rotates and the cancel cam surface 103 abuts the connecting pin 88 of the connecting member 87 as shown in FIG. 13, so that the connecting member 87 resists the elastic force of the spring 93. Slide it. As a result, the connecting pin 88 is disengaged from the engaging groove 89 of the output member 79, and the connection between the output member 79 and the connecting member 87 is released. This means that the power path of the power closing unit 8 has been cut off, thus stopping the rotation of the latch 16 in the full latch direction. In this way, the power path is cut by opening the open handles 34 and 36, so that the operation of the power closing unit 8 can be stopped easily and reliably even in an emergency.

17 and 18 show a resin cover 1 for providing the above-mentioned latch unit 7 with anti-theft property and waterproof property.
The state where 04 is attached is shown. Resin cover 104
Is composed of a main case 105 that surrounds the back side of the latch body 13 and a sub case 106 that surrounds the sub plate 30A extending rearward from the latch body 13.
Parts provided on the back side of the latch body 13 such as the wire lever 58, the open lever 32, the lock lever 33, and the switch body 66 are covered by the main case 105, and the inner lever 38 attached to the sub plate 30A by the sub case 106. And actuator 4
The output lever 45 and the like of No. 3 are covered.

The main case 105 is provided with an opening 107 serving as a passage for the rod 35 reaching the outer open handle 34 and the rod 41 reaching the key cylinder 40. A seal member 108 is provided on the front side of the upper portion of the main case 105 in order to enhance waterproofness.
Thus, the gap with the upper portion of the latch body 13 is closed. As a result, rainwater that has entered the door 2 will not be released by the latch unit 7.
Rainwater does not enter the upper portion of the latch unit 7 even if it falls on the. Therefore, it is not necessary to make the switch body 66 provided above the latch unit 7 waterproof. A flange 109 that facilitates the use of the seal member 108 is integrally formed on the upper portion of the latch body 13 of the embodiment (FIGS. 5 and 19).

[0032]

In the locked state of FIG. 8, when the inner lever 38 is rotated by opening the inner open handle 36, the inner lever 38 contacts the right arm 52B of the ratchet lever 52 and rotates the ratchet lever 52 counterclockwise. Then, the door 2 is opened. At the same time, the rotation of the ratchet lever 52 causes the left arm 52A of the ratchet lever 52 to move to the cancel portion 55 of the lock link 48.
Abutting against the lock link 48 to move the lock link 48 downward
To the unlock position. Therefore, the door 2 can be opened and the locked state can be released by a single operation by opening the inner open handle 36 (one-motion door opening).

When the door 2 is moved in the closing direction, the striker 6 fixed to the vehicle body enters the latch body 13 and contacts the U-shaped groove 15 of the latch 16 to open the latch 16 in the open position. When the ratchet 18 is engaged with the full-latch step portion 24 of the latch 16 in the full-latch position, the door 2 is completely closed.

However, if the door closing force is weak, the latch 16 may rotate only to the half-latch position due to the engagement with the striker 6. In such a case, the latch 16 is displaced by the power closing unit 8 from the half latch position to the full latch position. That is, when the latch 16 reaches the half-latch position, the switch lever 63 connected to the latch 16 by the latch pin 65 also rotates to the half-latch position, and the convex portion 67 of the switch lever 63 causes the switch body 6 to move.
6 contact arm 68. As a result, the switch body 66 detects the half-latch position and operates the motor portion 81 of the power closing unit 8 to move the output member 79 to the position shown in FIG.
Rotate clockwise at 2. Then, since the engaging groove 89 of the output member 79 is engaged with the connecting pin 88, the connecting member 87 also rotates clockwise, and the connecting pin 88 and the slot 90 are rotated.
By the engagement with the winch lever 84, the winch lever 84 also rotates clockwise to wind up the power wire 10, and the wire lever 58 of the latch unit 7 rotates counterclockwise in FIG. As a result, the pressing surface 69 of the wire lever 58 becomes
When the wire lever 58 is further rotated, the latch 16 is displaced to the full latch position by power as shown in FIG. 10, and the door 2 is completely closed.

If a hand or the like is caught during the closing of the door by the power closing unit 8, the outer open handle 34 is immediately opened. Then open lever 3
2 rotates and the rotation of the open lever 32 causes the safety wire 71 to pass through the safety link 71 and the safety lever 73.
Wind up. As a result, the cancel lever 96 of the power closing unit 8 rotates clockwise as shown in FIG.
The cancel cam surface 103 is the connecting pin 88 of the connecting member 87.
And the connecting member 87 is slid against the elastic force of the spring 93 to disengage the connecting pin 88 from the engaging groove 89 of the output member 79. Thereby, the output member 79 and the connecting member 8
The connection with 7 is released, the power transmission of the power closing unit 8 is stopped, the power wire 10 becomes free, and further closing of the door 2 is interrupted. At this time, in the present invention, although the one-motion door opening structure is adopted, the right arm 32B of the open lever 32 is extended to the right,
Since the inner lever 38 can be engaged with the inner open handle 36, the open lever 32 can be rotated even by the door opening operation of the inner open handle 36. Therefore, the inner open handle 36 can also free the power wire 10.

[0036]

As described above, according to the present invention, the latch 16 rotatable from the door open position to the full latch position via the half latch position by contact with the striker 6 fixed to the vehicle body, and the latch 16 are provided. A ratchet 1 for preventing the latch 16 from returning from the half latch position or the full latch position to the door opening position by engaging with
8, an open lever 32 connected to the outer open handle 34 of the vehicle door 2, an unlocked state in which the ratchet 18 can be disengaged from the latch 16 by the rotation of the open lever 32, and the rotation of the open lever 32. A locking mechanism that switches the ratchet 18 to a locked state in which the ratchet 18 cannot be disengaged from the latch 16, and when the ratchet 18 is connected to the inner open handle 36 of the vehicle door 2 and rotates, the ratchet 18 is locked regardless of the state of the locking mechanism.
And an inner lever 38 for separating the latch 16 from the latch 16, and the lock mechanism returns to the unlocked state when the inner lever 38 rotates in the locked state.
Associated with a wire lever 58 capable of rotating the latch 16 in the half-latch position to the full-latch position when rotated by the power of the power-close unit 8. A cancel lever 96 for disconnecting the power transmission path of the wire lever 58 to free the wire lever 58 is provided. The cancel lever 96 is connected to the open lever 32 so that the power transmission path is cut by the rotation of the open lever 32. Since the open lever 32 is a vehicle door latch device for closing the power door configured to be rotated by the rotation of the inner lever 18, one opening operation from the inside of the vehicle in the locked state can be performed to open and close the door. Door with so-called one-motion door opening mechanism that can be released It is possible to attach a power closing mechanism (power closing unit) to the switch device, and a safety mechanism for urgently stopping the power closing mechanism can be operated not only with the outer open handle but also with the inner open handle. Can be secured. Further, in the present invention, in the above apparatus, the ratchet 18 includes a ratchet lever 52 that rotates integrally with the ratchet 18.
The ratchet lever 52 includes a right arm 52B engageable with the inner lever 38, and the open lever 32 is provided so as to substantially overlap with the right arm 52B and engageable with the inner lever 38. A right arm 32B is provided, and the lock mechanism includes a cancel portion 55 for returning the lock mechanism to the unlocked state by engaging with the left arm 52A of the ratchet lever 52 when the ratchet lever 52 rotates in the locked state. Since the cancel lever 96 is the vehicle door latch device for power closing door connected to the left arm 32A of the open lever 32, it can be implemented with a simple structure.

[Brief description of drawings]

FIG. 1 is a side view showing the relationship between a vehicle door and a latch device according to the present invention.

FIG. 2 is a cross-sectional view showing the relationship between windows and a last latch unit.

FIG. 3 is a front view of the latch unit.

FIG. 4 is a rear view of the latch unit.

FIG. 5 is a developed vertical section of the latch unit.

FIG. 6 is a left side view of the latch unit.

FIG. 7 is a relationship diagram showing an unlocked state.

FIG. 8 is a relationship diagram showing a locked state.

FIG. 9 is an explanatory view showing a latch and a wire lever at a half-latch position.

FIG. 10 is an explanatory view showing a latch and a wire lever at a full latch position.

FIG. 11 is a vertical sectional side view showing a mounting state of the latch unit.

FIG. 12 is a front view of the power closing unit.

FIG. 13 is an explanatory diagram showing a state in which the cancel lever is rotated during the operation of the power closing unit.

FIG. 14 is a sectional view of a power closing unit.

FIG. 15 is a front view of a winch lever.

FIG. 16 is a front view of a connecting member.

FIG. 17 is a rear view of the latch unit with a resin cover attached.

FIG. 18 is a right side view of the latch unit with a resin cover attached.

FIG. 19 is a partial cross-sectional view showing a resin cover, a waterproof seal, and a latch body.

[Explanation of symbols]

1 ... Door latch device, 2 ... Vehicle door, 3 ... Metal outer plate,
4 ... metal inner plate, 5 ... window glass, 6 ... striker, 7 ...
Latch unit, 8 ... power closing unit, 9 ... metal rear plate, 10 ... power wire, 11 ... safety wire, 1
2 ... glass rail, 13 ... latch body, 14 ... recess,
15 ... U-shaped groove, 16 ... Latch, 17 ... Latch shaft, 18 ...
Ratchet, 19 ... Ratchet shaft, 20, 21 ... Spring,
22 ... Guide groove, 23 ... Half-latch step, 24 ... Full-latch step, 25 ... Rear bulge, 26 ... Cover plate,
27 ... Support plate, 28 ... Bending part, 29 ... Fixing device, 3
0 ... Back plate, 30A ... Sub plate, 31 ... Bracket, 32 ... Open lever, 32A ... Left arm,
32B ... right arm, 33 ... lock lever, 34 ... outer open handle, 35 ... rod, 36 ... inner open handle, 37 ... wire, 38 ... inner lever, 39
... Lock shaft, 40 ... Key cylinder, 41 ... Rod, 42
... pin, 43 ... actuator, 44 ... output shaft, 45 ...
Output lever, 46 ... Inner lock button, 47 ... Wire, 48 ... Lock link, 49 ... Slot, 50 ... Lock pin, 51 ... Shaft, 52 ... Ratchet lever, 52A ... Left arm, 52B ... Right arm, 53 ... Ratchet Pin, 54
... abutment arm, 55 ... canceling part, 56 ... storage space, 57 ... wire shaft, 58 ... wire lever, 59 ...
Wire groove, 60 ... Cable end, 61 ... Spring, 62
... bottom wall, 63 ... switch lever, 64 ... arc slot,
65 ... Latch pin, 66 ... Switch body, 67 ... Convex part, 6
8 ... Contact arm, 69 ... Pressing surface, 70 ... Pin, 71 ... Safety link, 72 ... Shaft, 73 ... Safety lever, 74 ... Shaft, 7
5 ... Bending part, 76 ... Fixing device, 77 ... Cable end, 7
8 ... Base plate, 79 ... Output member, 80 ... Support shaft,
81 ... Motor part, 82 ... Gear, 83 ... Gear part, 84 ... Winch lever, 85 ... Wire groove, 86 ... Slot, 8
7 ... Connecting member, 88 ... Connecting pin, 89 ... U-shaped engaging groove,
90 ... Slot, 91, 92 ... Protrusion, 93 ... Spring, 9
4, 95 ... Shaft, 96 ... Cancel lever, 97 ... Intermediate lever, 98 ... First arm, 99 ... Pin, 100 ... Cable end, 101 ... Second arm, 102 ... Arc slot, 103 ... Cancel cam surface, 104 ... Resin cover,
105 ... Main case, 106 ... Sub case, 107 ... Opening part, 108 ... Seal member, 109 ... Collar part.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05B 65/12-65/42

Claims (2)

(57) [Claims] 1. A latch 16 rotatable by abutment with a striker 6 fixed to a vehicle body from a door open position to a full latch position via a half latch position, and the latch 16 engaged with the latch 16 18 for preventing the vehicle from returning from the half-latch position or the full-latch position to the open door position, and an open lever 32 connected to an outer open handle 34 of the vehicle door 2.
And rotation of the open lever 32 causes the ratchet 1
8 in the unlocked state where the latch 8 can be disengaged from the latch 16 and the rotation of the open lever 32.
Is locked to a state in which it cannot be disengaged from the latch 16, and the ratchet 18 is disengaged from the latch 16 regardless of the state of the lock mechanism when connected to the inner open handle 36 of the vehicle door 2 and rotated. An inner lever 38 and the lock mechanism is returned to the unlocked state when the inner lever 38 rotates in the locked state,
A wire lever 58, which is capable of rotating the latch 16 in the half-latch position to the full-latch position when rotated by the power of the power-closing unit 8 having a motor 81, is associated with the latch 16, and the power-closing unit 8 is connected. Is provided with a cancel lever 96 that disconnects the power transmission path of the power closing unit 8 to free the wire lever 58. The cancel lever 96 is connected to the open lever 32 and the open lever 32 is rotated to rotate the power. The open lever 32 is configured so that the transmission path is cut off.
A vehicle door latch device for power closing doors configured to rotate even when rotating. 2. The ratchet 18 according to claim 1.
Is connected to a ratchet lever 52 that rotates integrally with the ratchet 18, the ratchet lever 52 includes a right arm 52B engageable with the inner lever 38, and the open lever 32 substantially overlaps with the right arm 52B. Is provided so as to engage with the inner lever 38, and the lock mechanism engages with the left arm 52A of the ratchet lever 52 when the ratchet lever 52 rotates in the locked state. A vehicle door latch device for power closing, in which a cancel portion 55 for returning the lock mechanism to the unlocked state is provided, and the cancel lever 96 is connected to the left arm 32A of the open lever 32.