JP2001020579A - Vehicle door latch device with child lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a safety mechanism by the door opening operation with an inside open handle even when a child lock mechanism is in the child lock state. SOLUTION: This vehicle door latch device with child lock mechanism is formed so that the end part of a safety wire 40 ranging from a safety mechanism to an open lever 20 is connected to the open lever 20 with a first lost motion and also connected to one end of a safety lever 33, and the other end of the safety lever 33 is connected to an inner lever 42 through an unlock link with a second lost motion.

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 with a child lock mechanism.

[0002]

2. Description of the Related Art Conventionally, a latch engageable with a striker fixed to a vehicle body, a ratchet engaging with the latch to maintain engagement with the striker, and a ratchet connected to an outer open handle of a door to rotate, An open lever for releasing the ratchet from the latch, an inner lever connected to the inner open handle of the door, a child lock mechanism provided between the inner lever and the open lever, and A power closing unit that operates when rotated from the unlatched position to the half latched position by engagement to rotate the latch from the half latched position to the full latched position by motor power, wherein the power closing unit is connected to the open lever. When the open lever rotates, Serial child lock mechanism with a vehicle door latch apparatus having a safety mechanism to stop the rotation of the latch by motor power are known.

[0003]

The above-mentioned known mechanism has a structure in which the safety mechanism is operated by the opening rotation of the open lever, and the open lever is configured such that the child lock mechanism is in the child lock state. Since the connection with the inner open handle of the door is released, the safety mechanism cannot be operated by the inner open handle in the child lock state.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a latch 6 which can be engaged with a striker 2 fixed to a vehicle body, and a ratchet which is engaged with the latch 6 and holds the engagement with the striker 2. 7 and open handle 22 outside the door
The ratchet 7 is connected to the latch 6
An open lever 20 to be disengaged from the door, an inner lever 42 connected to an inner open handle 43 of the door,
When a child lock mechanism 45 provided between the inner lever 42 and the open lever 20 and the latch 6 rotates from an unlatched position to a half-latch position by engagement with the striker 2, the latch 6 is actuated to activate the latch 6. A power closing unit 37 that can be rotated from a half latch position to a full latch position by motor power. The power closing unit 37 is connected to the open lever 20 and operates when the open lever 20 rotates to operate by the motor power. An end of a safety wire 40 extending from the safety mechanism 39 to the open lever 20 is connected to the open lever 20 with a first lost motion, and a safety lever is provided. 33 to one end The other end of the lever 33 is obtained by a child lock mechanism with a vehicle door latch device which is connected with a second lost motion through the release link 52 to the inner lever 42.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. A vehicle door latch device 1 according to the present invention includes a striker 2 fixed to a vehicle body (not shown) and a striker 2 attached to a vehicle door (not shown). And a latch unit 3 that keeps the door closed in cooperation with the latch unit 3.

On the front surface of the synthetic resin latch body 4 of the latch unit 3, a wide recess 5 is formed.
Inside, a latch 6 and a ratchet 7 are rotatably mounted by a latch shaft 8 and a ratchet shaft 9, respectively. In FIG. 1, the latch 6 is urged in a clockwise direction by the elastic force of a latch spring 10, and the ratchet 7 is urged in a counterclockwise direction by the elastic force of a ratchet spring 11. When the door is manually moved in the closing direction, the striker 2 relatively enters into the horizontal passage 12 formed in the latch body 4 and the striker 2 moves to the unlatched position of the latch 6 (the position in FIG. 1). The latch 6 comes into contact with the mold groove 13 and is rotated counterclockwise. When the latch 6 rotates from the unlatched position to the half-latch position due to contact with the striker 2, the ratchet 7 engages with the half-latch step portion 14 of the latch 6, and the door is initially closed. When the half latch position (state) is reached, and when the latch 6 rotates to the full latch position, the ratchet 7 engages with the full latch step 15 of the latch 6, the door is completely closed, and the full latch position (state) is reached. Becomes

The ratchet 7 is connected to the latch body 4
And a ratchet pin 17 projecting to the rear side of the latch body 4 through the opening 16 of the latch body 4. A metal cover plate 18 for closing the concave portion 5 is fixed to the front surface of the latch body 4, and a metal back plate 19 is fixed to the rear surface of the latch body 4, as shown in FIG. The back plate 1
9 is bent rearward at a right angle to form a sub-plate 19A.

On the rear side of the latch unit 3, an open lever 20 for releasing the ratchet 7 from the latch 6 and a lock lever 21 for switching the latch unit 3 between a locked state and an unlocked state are provided. . The open lever 20 is connected to the ratchet shaft 9.
The door is rotatably attached to the door, and its outdoor end is connected to the outer open handle 22 of the door via a rod 23 in a lost motion. The lock lever 21 is supported by the back plate 19 by a lock shaft 24. The indoor end of the lock lever 21 is connected to an inner lock button 25 of the door.

A motor type actuator 26 is fixed to the sub-plate 19A if desired, and an output lever (not shown) of the actuator 26 is connected to the lock lever 21.
Is engaged with the connection hole 27 formed at the indoor side end of the vehicle.

A lock link 28 is provided between the lock lever 21 and the open lever 20 so as to extend in the vertical direction of the latch body 4. A lock pin 30 slidably engaged with a long hole 29 formed in the open lever 20 is provided at an upper portion of the lock link 28.
Is connected to the lock lever 21 by a shaft 31.

A ratchet lever 32 is pivotally supported on the ratchet shaft 9. The ratchet lever 32 is located on the back surface side of the latch body 4, and the ratchet pin 17 of the ratchet 7 is engaged with an outer arm 32 </ b> A extending to the outside of the ratchet lever 32 so that the ratchet lever 32 is integrated with the ratchet 7. To rotate.

The lock lever 21 is switched between an unlock position X and a lock position Y by rotating by the operation of the lock button 25 or the actuator 26, as is well known. When the lock lever 21 is rotated counterclockwise from the position shown in FIG. 2 and displaced to the unlock position X, the lock pin 30 moves down in the elongated hole 29 and can engage with the contact arm 32B of the ratchet lever 32. Confront. In this unlocked state, the open lever 20
However, when the outer open handle 22 is rotated counterclockwise by the door opening operation, the lock pin 30 contacts the contact arm 32B to rotate the ratchet lever 32 counterclockwise. Thereby, the ratchet 7 is connected to the ratchet pin 17.
And the engagement with the latch 6 is released, the engagement between the latch 6 and the striker 2 is released, and the door is opened.

On the other hand, when the lock lever 21 is at the lock position Y shown in FIG. 2, the lock pin 30 is separated from the contact arm 32B and the opposed state is released.
Therefore, in the locked state, the ratchet lever 32 does not rotate even if the open lever 20 is rotated counterclockwise by the outer open handle 22, so that the door does not open.

Although not shown in FIG. 2, a safety lever 33 overlapping with the open lever 20 is rotatably mounted on the ratchet shaft 9 as shown in FIG. The upper end of the wire link 35 is connected to the outdoor end of the safety lever 33 by a connecting pin 34, and the end of the connecting pin 34 is slidably engaged with an arc slot 36 formed on the outdoor side of the open lever 20. Let it.

As shown in FIG. 1, a motor type power closing unit 37 for supplying power for moving the door from the half latch position to the full latch position is connected to the latch unit 3. Close unit 3
The motor power 7 is transmitted to the latch 6 of the latch unit 3 via a flexible power wire 38. The power closing unit 37 operates when the door is moved from the open position to the half-latch position with manual power and is initially closed, and rotates the latch 6 in the full latch direction via the power wire 38. Therefore, even if the force at the time of closing the door is insufficient to fully latch the door, the door is completely closed by the power of the motor after the door is half-latched.

The closing unit 37 has a safety mechanism 3
9 are provided. A flexible safety wire 40 reaching the safety mechanism 39 is connected to a lower portion of the wire link 35 preferably via a crank lever (not shown). The safety mechanism 39 is activated when the door open handle 22 is opened and the wire link 35 is moved downward while the door is moving from the half latch position to the full latch position by the motor power of the closing unit 37. Then, the motor of the power closing unit 37 is stopped and the power wire 38 is released. Therefore, when an unexpected situation occurs while the door is being closed by power, this can be avoided by operating the open handle 22 to open the door.

An L-shaped inner lever 42 is pivotally supported on the sub-plate 19A by a shaft 41. One arm 42A of the inner lever 42 is connected to an open handle 43 inside the door via a wire 44 or the like.

A child lock mechanism 45 is provided between the inner lever 42 and the open lever 20. The upper end of the child drink 46 which is long in the vertical direction of the child lock mechanism 45 has the inner lever 42.
The other arm 42B is pivotally supported by a pin 47, and a vertical slot 48 is formed below the child drink 46. The switching pin 50 of the child lock operation lever 49 is slidably engaged with the slot 48, and the operation of the operation lever 49 causes the child drink 46 to swing about the pin 47 so that the child lock position and the child unlock position can be set. It is constituted so that it may be displaced.

An engagement piece 51 is provided below the child drink 46. The engagement piece 51 is connected to the child drink 46.
Is in the child unlocked position, the open lever 20 is opposed to the indoor end 20A of the open lever 20 so as to be engageable. Therefore, when the inner lever 42 is rotated by the inner open handle 43 at the time of child unlocking, the child drink 46 moves upward, the engaging piece 51 abuts on the open lever 20, and the open lever 20 is rotated to open the door. Therefore, if the lock lever 21 is unlocked, the door is opened.

When the child drink 46 is displaced to the child lock position by the operation lever 49, the engagement piece 51 is moved to the indoor end 2 of the open lever 20.
It becomes impossible to engage at a distance from 0A. Therefore, at the time of child lock, the inner lever 42 is rotated by the inner open handle 43 so that the child drink 46 is rotated.
The door is not opened because the engaging piece 51 does not abut the open lever 20 even if is moved upward.

The upper end of a vertically long release link 52 is pivotally supported by the pin 47 on the arm 42B of the inner lever 42, and a pin 53 is provided at the lower end of the release link 52. Indoor end 33A
Is slidably engaged with the arc-shaped slot 54 formed in the above.

[0022]

When the door is manually moved in the closing direction, the striker 2 relatively enters the horizontal passage 12 and contacts the U-shaped groove 13 of the latch 6 to rotate the latch 6 counterclockwise in FIG. When the latch 6 is set to the half-latch position by manual closing, the power closing unit 37 is operated, and thereafter, the power wire 38 is pulled by the motor power to displace the latch 6 to the full latch position.

When an unexpected situation occurs while the latch 6 is being rotated by the motor power, the outer open handle 22 or the inner open handle 43 is opened. When the outer open handle 22 is operated to open the door, the open lever 20 rotates to open the door via the rod 23 (counterclockwise rotation in FIGS. 2 and 4), whereby the ends of the arc slot 36 are immediately connected. Since the pin 34 is pressed to move the wire link 35 downward, the safety mechanism 39 operates without delay via the safety wire 40,
By stopping the motor of the power closing unit 37 and releasing the power wire 38, an unexpected situation can be avoided.

When the inner open handle 43 is operated to open the door, the inner lever 42 rotates via the wire 44. At this time, the child lock mechanism 45
Is in child lock state, child drink 4
6, the opening lever 20 cannot be rotated, but the rotation of the inner lever 42 causes the release lever 52 to rotate.
4, the safety lever 33 rotates counterclockwise in FIG. 4, so that the connecting pin 34 moves downward and the safety mechanism 3
9 is activated.

[0025]

As described above, the present invention provides a latch 6 which can be engaged with a striker 2 fixed to a vehicle body, and a ratchet 7 which is engaged with the latch 6 and holds the engagement with the striker 2. An open lever 20 connected to the outside open handle 22 of the door to release the ratchet 7 from the latch 6 when rotated, an inner lever 42 connected to the inside open handle 43 of the door, the inner lever 42 and the open A child lock mechanism 45 provided between the lever 20 and the latch 6 is actuated when the latch 6 is rotated from the unlatched position to the half latched position by engagement with the striker 2 to move the latch 6 from the half latched position by motor power. A power closing unit 37 capable of rotating to a full latch position; 37 in those with a safety mechanism 39 for stopping the rotation of the latch 6 by the motor power operated with the open lever 20 rotates is connected to the open lever 20, the safety mechanism 39
The end of the safety wire 40 from the open lever 20 to the open lever 20 is connected to the open lever 20 with a first lost motion and to one end of a safety lever 33, and the other end of the safety lever 33 is connected to the inner lever 4
Since the vehicle door latch device with the child lock mechanism is connected to the vehicle door 2 through the release link 52 with the second lost motion, even if the child lock mechanism 45 is in the child lock state, the safety mechanism 39 is opened by the opening operation of the inner open handle 43. Can be activated. Also,
In the present invention, the safety lever 33 is a vehicle door latch device with a child lock mechanism supported by the same shaft 9 at a position where the safety lever 33 overlaps with the open lever 20, so that the latch unit can be prevented from being enlarged.

[Brief description of the drawings]

FIG. 1 is a front view of a latch assembly.

FIG. 2 is a rear view of the latch assembly in a locked state.

FIG. 3 is a rear view of the open lever.

FIG. 4 is a rear view of a main part.

FIG. 5 is a side view of a main part.

FIG. 6 is a sectional view of a main part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle door latch device, 2 ... Striker, 3 ... Latch unit, 4 ... Latch body, 5 ... Recess, 6 ... Latch,
7: ratchet, 8: latch axis, 9: ratchet axis, 1
0: Latch spring, 11: Ratchet spring, 12: Horizontal passage, 13: U-shaped groove, 14: Half latch step, 15: Full latch step, 16: Opening, 17: Ratchet pin, 1
8 ... Cover plate, 19 ... Back plate, 19A ...
Sub-plate, 20: open lever, 20A: indoor end, 21: lock lever, 22: outer open handle, 23: rod, 24: lock shaft, 25: inner lock button, 26: motorized actuator, 27: coupling Hole, 28 ... Lock link, 29 ... Long hole, 30 ... Lock pin, 31 ... Shaft, 32 ... Ratchet lever, 32A ... Outer arm, 32B ... Contact arm, 33 ... Safety lever,
33A: Indoor end, 34: Connecting pin, 35: Wire link, 36: Arc slot, 37: Motor type power closing unit, 38: Power wire, 39: Safety mechanism,
40 safety wire, 41 shaft, 42 inner lever, 42A, 42B arm, 43 inner open handle, 44 wire, 45 child lock mechanism,
46: Child drink, 47: Pin, 48: Slot, 49: Child lock operation lever, 50: Switching pin, 51: Engagement piece, 52: Release link, 53: Pin, 5
4: An arc slot.

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[Procedure amendment]

[Submission date] September 22, 1999 (September 9, 1999
2)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuto Yokomori 1200 Shimojo Nishiwari, Ogusa-cho, Nirasaki City, Yamanashi Prefecture F-term in the Nirasaki Plant of Mitsui Kinzoku Mining Co., Ltd. 2E250 AA21 HH02 JJ37 JJ39 JJ53 KK02 LL01 PP04 PP05 PP12 PP13 QQ03 RR11

Claims (2)

[Claims] 1. A latch 6 that can be engaged with a striker 2 fixed to a vehicle body, a ratchet 7 that is engaged with the latch 6 to maintain engagement with the striker 2, and an outer open handle 22 of a door. An open lever 20 that is connected and rotates to release the ratchet 7 from the latch 6
An inner lever 42 connected to the inner open handle 43 of the door, a child lock mechanism 45 provided between the inner lever 42 and the open lever 20, and an engagement of the latch 6 with the striker 2. And a power closing unit 37 which operates when rotated from the unlatched position to the half latched position to rotate the latch 6 from the half latched position to the full latched position by motor power. A safety mechanism 39 that is connected to operate when the open lever 20 rotates and stops the rotation of the latch 6 by the motor power.
0 is connected to the open lever 20 with the first lost motion and to one end of the safety lever 33, and the other end of the safety lever 33 is connected to the inner lever 42 via a release link 52. And a vehicle door latch device with a child lock mechanism connected with a second lost motion. 2. The safety lever according to claim 1, wherein
Is a vehicle door latch device with a child lock mechanism supported by the same shaft 9 at a position overlapping with the open lever 20.