JP3502599B2 - Vehicle door latch device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door latch device, and more particularly to a power closing mechanism for doors (doors for getting on and off, door racks, glass hatches, tailgates, etc.). And a latch device having a power open mechanism. 2. Description of the Related Art Conventionally, a door latch device having both a power closing mechanism and a power opening mechanism is known. A known power closing mechanism is a mechanism that displaces a door from a half-latched state to a full-latched state by rotating a latch of a latch device that engages with a striker from a half-latch position to a full-latch position by motor power. Further, the known power opening mechanism opens the door by releasing the ratchet of the latch device, which engages with the latch and retains the engagement state between the latch and the striker, with the power of the motor from the latch. It is a mechanism to do. [0003] The problem of the known device is that two motors are used, a motor for a power closing mechanism and a motor for a power opening mechanism. [0004] Therefore, the present invention provides a striker 8
A power closing mechanism for rotating the latch 6 engaged with the latch 6 from the half latch position to the full latch position by motor power, and engaging the latch 6 with the latch 6 and the striker 8.
A ratchet 7 for holding the engaged state e Bei the withdrawal monkey power open mechanism from the latch 6 in motor power of the motor for rotating the fully latched position the latch 6 from the half-latched position, the ratchet 7 The motor that is released from the latch is one common motor 10
And the power of the motor 10
Door opening direction opposite to the closing direction from the closed position
A gear 14 that rotates in both directions,
The latch 6 is actuated by rotation in the closing direction to release the latch 6.
Press the lever to displace it from the latch position to the full latch position.
Pressure link 20 and the rotation of the gear 14 in the door opening direction.
To release the ratchet 7 from the latch 6
The operation is performed by the ratchet lever 32 to be operated and the operation knob 41.
When it is made, it comes into contact with the ratchet lever 32 and
An open lever 37 for operating the cheet lever 32;
The pressing link 20 has the open lever 3
Guides slidably engaged with pins 25 supporting
This is a configuration of a vehicle door latch device provided with a lot 24 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A door latch device 1 according to the present invention includes a latch body 4 including a base plate 2 and a cover plate 3. The door latch device 1 shown in the figure is for a tailgate, and is fixed to the tailgate 5. The shape of the tailgate latch body 4 is disclosed in Japanese Unexamined Patent Publication No. Hei 4-29768.
Reference can be made to those described in Japanese Patent Publication No. A well-known latch 6 and a ratchet 7 are supported inside the latch body 4. The latch 6
When the tailgate 5 is moved in the door closing direction, the tailgate 5 comes into contact with a striker 8 fixed to a vehicle body (not shown).
First, when the tailgate 5 is rotated from the unlatched position to the half-latch position to initially engage with the striker 8 and further moved in the door closing direction, the tailgate 5 is rotated from the half-latch position to the full-latch position and fully engaged with the striker 8. The ratchet 7 retains the engagement between the latch 6 and the striker 8 by engaging with the latch 6. A bracket 9 rising upward is fixed to the latch body 4, and a motor unit 12 including a motor 10 and a speed reduction mechanism 11 is mounted on the upper portion of the bracket 9. A sector gear 14 is supported at the center of the bracket 9 by a sector shaft 13, and teeth of the sector gear 14 mesh with an output gear 15 of the motor unit 12. The position of the sector gear 14 shown in FIG. 1 is a neutral position, and from this position, the sector gear 14 rotates in both a clockwise direction (door closing direction) and a counterclockwise direction (door opening direction) by the power of the motor 10. A sector switch 16 is provided at a position near the sector gear 14 of the bracket 9.
Is attached. Contact terminal 17 of sector switch 16
When the sector gear 14 rotates, it selectively comes into contact with and separates from the two pressing pieces 18 and 19 implanted in the sector gear 14 and turns on and off. A right end 21 of a pressing link 20 (FIG. 3) is pivotally supported by a pin 22 on the base side of the sector gear 14. The pressing link 20 is long in the left-right direction, and a contact portion 23 having a vertical surface is formed at a lower center portion thereof.
4 are formed. The leading end (front end) of a guide pin 25 extending in the front-rear direction is slidably inserted into the guide slot 24. The pressing link 20 is connected to the sector gear 1.
When 4 turns right from the neutral position, the left side moves as a whole to the left while being guided by the guide pins 25. The rear end of the guide pin 25 is inserted into a vertical moving groove 26 formed in the bracket 9, so that the guide pin 25 is slidably supported by the bracket 9 in the vertical direction. A latch lever 27 that rotates integrally with the latch 6 is provided outside the upper portion of the latch body 4. The latch 6 and the latch lever 27 are connected via a latch shaft 28 serving as a rotation axis of the latch 6, but may be connected to each other by a connecting pin (not shown). The distal end 29 of the latch lever 27 faces the vicinity of the contact portion 23 of the pressing link 20. When the pressing link 20 moves to the left by the power of the motor 10, the abutting portion 23 moves the tip 2 of the latch lever 27.
9 to rotate the latch 6 in the full latch direction via the latch lever 27. In the above description, the motor 10
The mechanism for rotating the latch lever 27 with the motor power described above is the power closing mechanism in the present invention. A mounting piece 30 is integrally formed on the cover plate 3 of the latch body 4 and a shaft 3 is attached to the mounting piece 30.
1 supports the ratchet lever 32. The first arm 33 of the ratchet lever 32 is connected to the base plate 2.
Extending from the gap between the cover plate 3 and the inside of the latch body 4 so that the tip 3 of the ratchet 7
4 near. The short second arm 35 of the ratchet lever 32 is integrally formed with a bent piece 36 bent rearward so as to reach an upper position of the right end 21 of the pressing link 20. The bent piece 36 is connected to the sector gear 14.
Is turned to the left from the neutral position.
Abuts the right end 21 of the ratchet lever 32, whereby the ratchet lever 32 turns left around the shaft 31 so that the first arm 33 contacts the tip 34 of the ratchet 7 to release the ratchet 7. Then, the ratchet 7 is disengaged from the latch 6 and the tailgate 5 is opened. In the above description, the motor 10
The mechanism for rotating the ratchet 7 by the motor power is the power open mechanism in the present invention, and the power open mechanism shares one motor 10 with the power close mechanism. [0015] on the left side of the ratchet lever 32, Oh
Pun lever 37 is disposed. The open lever 37 is rotatably supported by the front end of the guide pin 25. Oh
At the right end of Pun lever 37, the ratchet lever 3
A pressing piece 39 that contacts the second third arm 38 is formed. Reference numeral 40 denotes a latch switch for detecting the half-latch position of the latch 6, and reference numeral 41 denotes an operation knob on the left end of the open lever 37. In the neutral state shown in FIG. 1, when the tail gate 5 is moved in the door closing direction, the latch 6 comes into contact with the striker 8 to rotate from the unlatched position to the half-latch position, and the ratchet 7 engages with the latch 6. In addition, the latch 6 is prevented from returning toward the unlatched position. When the latch switch 40 detects the displacement of the latch 6 to the half-latch position, the motor 10 rotates in the door closing direction to rotate the sector gear 14 rightward in FIG. Then, the pressing link 20 connected to the sector gear 14 by the pin 22 moves to the left, and the contact portion 23 of the pressing link 20 contacts the tip end 29 of the latch lever 27 to rotate the latch lever 27. Latch lever 2
The latch 6 that rotates integrally with the latch 7 is rotated toward the full latch position (FIG. 4). As a result, the latch 6 moves from the half latch position to the full latch position by the power of the motor 10, and the tailgate is closed. In the above, the amount of rotation of the motor 10 in the door closing direction is controlled by time or a load applied to the motor.
When the latch 6 is displaced to the full latch position, the motor 10 reverses and rotates in the door opening direction. When the contact terminal 17 of the sector switch 16 contacts the pressing piece 18 of the sector gear 14, the motor 10 stops. To urgently stop and stop the power closing by the power of the motor 10, the open lever 37 is operated. When the operation knob 41 at the left end of the open lever 37 is lifted upward, first, the open lever 37 turns right around the guide pin 25, and the pressing piece 39 contacts the third arm 38 of the ratchet lever 32, and the ratchet lever 32
Is turned to the left around the axis 31. Then, the first arm 33 of the ratchet lever 32 comes into contact with the tip 34 of the ratchet 7 to rotate the ratchet 7. This releases the latch 6 from being restrained by the ratchet 7 (FIG. 6). When the operating knob 41 of the open lever 37 is further lifted with the ratchet 7 released from the latch 6, the ratchet lever 32 does not rotate any more, so the pressing piece 39 and the third arm 38 of the ratchet lever 32 are not rotated. The guide pin 25 is moved upward along the moving groove 26 by using the contact portion of the guide pin 25 as a fulcrum. Then, the pressing link 20 whose left portion is supported by the guide pin 25 moves upward on the left side around the right pin 22, and the pressing link 20
The contact portion 23 is detached from the distal end 29 of the latch lever 27, whereby the connection between the latch 6 and the motor 10 is released (FIG. 7). When the latch 6 is released from the latch 6 by the ratchet 7 and the connection between the latch 6 and the motor 10 is released in this manner, the power closing door by the power of the motor 10 is stopped, and the latch 6 becomes free. The tailgate 5 can be rotated in the unlatch position direction, and the tailgate 5 can be opened in an emergency. When the motor 10 is rotated in the door opening direction in the closed state, the sector gear 14 turns left from the neutral position. The rotation of the motor 10 to open the door is performed by a door opening operation of a separately provided remote controller or an indoor start switch. The right end portion 21 of the pressing link 20 when the sector gear 14 is Hidariten is moved upward to the bending pieces 36 of the ratchet lever 32 abuts the first and thereby the ratchet lever 32 is Hidariten around the shaft 31 Arm 33 is ratchet 7
The ratchet 7 is rotated by contacting the tip 34 of the ratchet 7, thereby releasing the ratchet 7 from the latch 6 and opening the tailgate 5. Although the door latch device 1 according to the present invention has been described and illustrated as a latch device for a tailgate, the basic concept of the power closing mechanism and the power opening mechanism described above is based on an entrance door (swing type door and door). (Including a sliding door), and is not limited to a tailgate latch device. As described above, the present invention provides a striker 8
A power closing mechanism for rotating the latch 6 engaged with the latch 6 from the half latch position to the full latch position by motor power, and engaging the latch 6 with the latch 6 and the striker 8.
A ratchet 7 for holding the engaged state e Bei the withdrawal monkey power open mechanism from the latch 6 in motor power of the motor for rotating the fully latched position the latch 6 from the half-latched position, the ratchet 7 The motor that is released from the latch is one common motor 10
And the power of the motor 10
Opening direction from the closed position and the opposite direction from the closed position
A gear 14 that rotates in both directions,
The latch 6 is actuated by the rotation in the closing direction to release the latch 6.
Press the lever to displace it from the latch position to the full latch position.
Pressure link 20 and the rotation of the gear 14 in the door opening direction.
To release the ratchet 7 from the latch 6
The operation is performed by the ratchet lever 32 to be operated and the operation knob 41.
When it is made, it comes into contact with the ratchet lever 32 and
An open lever 37 for operating the cheet lever 32;
The pressing link 20 has the open lever 3
Guides slidably engaged with pins 25 supporting
Since the vehicle door latch device provided with the lot 24 is provided , the power open mechanism and the power close mechanism are connected to one motor 1
Since 0 is shared with each other, an inexpensive and small door latch device can be obtained .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a door latch device of the present invention. FIG. 2 is a partially longitudinal side view of the same. FIG. 3 is a front view of a pressing link of the door latch device. FIG. 4 is a view showing a state in which a sector gear of the door latch device is rotated in a door closing direction. FIG. 5 is a view showing a state in which the sector gear is rotated in a door opening direction. FIG. 6 is a diagram showing a state where a ratchet is rotated by an emergency lever. FIG. 7 is a diagram showing a state in which a pressing link is released from a latch lever by an emergency lever. [Description of Signs] 1 ... door latch device, 2 ... base plate, 3 ... cover plate, 4 ... latch body, 5 ... tailgate, 6 ...
Latch, 7: Ratchet, 8: Striker, 9: Bracket, 10: Motor, 11: Reduction mechanism, 12: Motor unit, 13: Sector shaft, 14: Sector gear, 15
... Output gear, 16 ... Sector switch, 17 ... Contact terminal, 18, 19 ... Pressing piece, 20 ... Press link, 21 ... Right end part, 22 ... Pin, 23 ... Contact part, 24 ... Guide slot, 25 ... Guide pin , 26: moving groove, 27: latch lever, 28: latch shaft, 29: tip, 30: mounting piece, 3
1 ... shaft, 32 ... ratchet lever, 33 ... first arm,
34 ... tip, 35 ... second arm, 36 ... bent piece, 37 ...
Open lever, 38: third arm, 39: pressing piece, 4
0 ... Latch switch, 41 ... Operation knob.

Claims (1)

(57) Claims: 1. A power closing mechanism for rotating a latch engaged with a striker from a half latch position to a full latch position by motor power, and a latch engaged with the latch to engage the latch. 6 and Bei example a withdrawal monkey power open mechanism a ratchet 7 for holding the engagement with the striker 8 from the latch 6 with motor power, a motor for rotating the fully latched position the latch 6 from the half-latched position The motor that releases the ratchet 7 from the latch is a common single motor 10 ,
From the neutral position to the door closing direction by the power of the motor 10
And both directions of opening direction opposite to the closing direction
The gear 14 and the rotation of the gear 14 in the closing direction
Activates the latch 6 from the half-latch position
A pressing link 20 for displacing to a full latch position;
A14 is operated by the rotation of the
Ratchet lever for releasing the socket 7 from the latch 6
32 and the operation knob 41
The ratchet lever 32 is formed by contacting the
And an open lever 37 for moving the pressing link.
20 has a pin 25 for supporting the open lever 37.
A vehicle door latch device provided with a guide slot 24 slidably engaged.