JP4105806B2 - Door lock operating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door lock operating device including a motor that can electrically control a door lock for a vehicle such as a passenger car.
[0002]
[Prior art]
Conventionally, in Japanese Patent Application Laid-Open No. 9-105262, a vehicle door lock that keeps a door closed by engagement of a latch and a striker, and a first electrically controllable actuator (hereinafter referred to as a first motor) , The unlatching actuator having an unlatching function for moving the latch to a position where the engagement between the latch and the striker can be released when the internal operation lever is manually operated, and the second electric Position where the meshing state between the latch and the striker cannot be released even if the internal operation lever is manually operated by transmitting the rotation output of the controllable actuator (hereinafter referred to as the second motor) to the latch. A vehicle door lock operating device having a double lock actuator having a double lock function for moving a latch is proposed.
[0003]
[Problems to be solved by the invention]
In the unlatching actuator, the worm gear fixed to the output shaft of the first motor is rotated by the first motor, and the worm wheel meshing with the worm gear is rotated. Since the rotation shaft of the worm wheel is coaxially fixed to the rotation shaft of the drive cam, the drive cam is operated in accordance with the rotation operation of the worm wheel.
[0004]
As a result, the latching claw member (ratchet) that drives the latch by meshing contact with the latch rotates. At this time, a striker is present in a notch provided between the two branches of the latch, and a door reaction force f (30 kgf to 50 kgf) including a repulsive force of a seal material or the like acts in a predetermined direction. In addition, a predetermined frictional force (friction coefficient: about μ ₁ = 0.2) acts on the meshing contact portion of the ratchet and the meshing contact portion of the latch.
[0005]
Therefore, the driving load F ₁ when the ratchet is rotated by the rotation output (driving force) of the unlatching actuator having the first motor is expressed by the following equation (1). As a result, the ratchet to which a large driving load of about 6 kg to 10 kg is applied needs to be rotated by the driving force of the first motor. Therefore, the ratchet required rotating torque at the time of unlatching operation, that is, the unlatching operating force (first motor) Of the first motor of the unlatching actuator needs to be increased in size and increased in current. As a result, there is a problem in that the size of the door lock operating device itself that electrically controls the unlatching operation of the vehicle door lock is increased.
[Expression 1]
F ₁ = f × μ ₁
[0006]
OBJECT OF THE INVENTION
SUMMARY OF THE INVENTION An object of the present invention is to provide a door lock operating device that can realize downsizing of a motor and, hence, a reduction in current, by reducing a ratchet required turning torque during unlatching operation, that is, unlatch operating force. It is another object of the present invention to provide a door lock operating device that can suppress an increase in size of the device itself.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, the sub-ratchet that has locked the sub-latch in the full-latch state and the half-latch state by receiving the rotation output of the motor and rotating around the support shaft during the unlatching operation. Is out of engagement with the sub-latch. As a result, the sub-latch rotates with the urging force of the sub-latch spring to rotate the ratchet around the support shaft, so that the engagement with the ratchet is released and the latch rotates with the force of the latch spring. The meshing state between the latch and the striker is released. At this time, it is the sub ratchet that is driven by the motor, and its required torque is about 1/5 that of the direct drive of the ratchet.
[0008]
As a result, the motor driving load during the unlatching operation for rotating the latch from the fully latched state to the unlatched state can be reduced, so that the ratchet required turning torque during the unlatching operation, that is, the unlatching operating force can be reduced. Therefore, it is possible to easily reduce the size of the motor and hence the current, and to suppress the increase in size of the door lock operating device itself.
[0009]
According to the second aspect of the present invention, as the sublatch spring, the coil part is provided on the support shaft that is the rotation center of the sublatch, one terminal part is held by the fixing member, and the other terminal part is outside the sublatch. A torsion coil spring held at the periphery is used.
[0010]
According to the third aspect of the present invention, the sub ratchet is provided with the sub ratchet return spring that is biased toward the side engaged with the sub latch, so that the striker pushes the latch and the latch becomes the half door state or the full latch state. In this case, the sub ratchet can be engaged with the sub latch. As a result, the urging force is stored in the sub-latch spring, so that the next time the motor is driven, the unlatching operation can be performed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
[Configuration of Example]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. Here, FIG. 1 is a diagram showing an overall configuration of the vehicle door lock operating device.
[0012]
The vehicle door lock operating device 1 of this embodiment includes a vehicle door lock 2, an unlatching actuator 4 having a motor 3 that can electrically control the vehicle door lock 2, and rotation of the unlatching actuator 4. A sub ratchet mechanism 5 for performing an unlatching operation for operating the vehicle door lock 2 from a fully latched state to an unlatched state according to an output, and a door lock control device (not shown) for controlling the unlatching actuator 4 are provided. .
[0013]
The vehicle door lock 2 keeps a door (not shown) mounted on a vehicle such as a passenger car in a closed state (full latch state). The ratchet 6 driven by the sub-ratchet mechanism 5 and the rotation of the ratchet 6 The latch 9 is configured to rotate so as to change the engagement state (engagement state) with the substantially U-shaped striker 7 fixed to the door receiving portion of the vehicle according to the position.
[0014]
The ratchet 6 is rotatable about a support shaft 11 around a support shaft 11 provided in a main body case (one side plate) 10 having a U-shaped notch (groove-shaped portion) 8. It is the latching claw member provided. The ratchet 6 is provided with a claw-shaped engagement portion 12 that meshes with the latch 9, a columnar projection 13 that engages with the sub-ratchet mechanism 5, and the like.
[0015]
The latch 9 is provided so as to be rotatable around the support shaft 14 around the support shaft 14 provided in the main body case 10. Then, the latch 9 releases the full latch state (door closed state) that is completely engaged with the striker 7, the half latch state (half door state) that is not completely engaged with the striker 7, and the engagement with the striker 7 according to the rotation angle. To an unlatched state.
[0016]
A U-shaped notch (recessed portion) 15 capable of receiving the striker 7 is provided between the two forks of the latch 9. The latch 9 has a claw-shaped first engaging portion 16 that engages with the engaging portion 12 of the ratchet 6 when in the fully latched state, and an engaging portion of the ratchet 6 when in the half-door state. A claw-shaped second engaging portion 17 that meshes with the second engaging portion 12 is provided.
[0017]
The latch 9 is provided with a protruding piece 18 that protrudes from the opposite side to the notch 15 side on the opposite side of the fork. In the vicinity of the tip of the projecting piece 18, a cylindrical projection 19 projecting in a direction substantially orthogonal to the surface direction of the projecting piece 18 is provided. A groove-like portion 21 for receiving a latch return spring 20 for returning the latch 9 to the initial position is formed around the support shaft 14 of the main body case 10. One end of the latch return spring 20 is locked to a groove wall surface of a groove-like portion 21 provided in a main body case (the other side plate) (not shown), and the other end is attached to a cylindrical projection 22 of the latch 9. It is locked.
[0018]
The unlatching actuator 4 includes a single motor 3 and a reduction gear mechanism (not shown) for reducing the rotational speed of the rotation shaft of the motor 3 in a resin actuator case 23. The output shaft 24 of the reduction gear mechanism of the unlatching actuator 4 protrudes from the side wall surface of the actuator case 23 toward the sub ratchet mechanism 5. An output lever 25 that rotates about the output shaft 24 is fixed to the output shaft 24. The motor 3 receives a control signal from the door lock control device during the unlatching operation and generates a rotation output.
[0019]
The sub ratchet mechanism 5 corresponds to the unlatching operation means of the present invention, and includes a connecting rod 30 that engages with the ratchet 6, a sub latch 32 that engages with the connecting rod 30, and an escape lever that engages with the sub latch 32. 31 and a sub ratchet 33, and a sub latch spring 35 provided on a support shaft 34 of the sub latch 32.
[0020]
An engagement hole 36 that engages with the protrusion 13 of the ratchet 6 is formed on one end side of the connecting rod 30. A ratchet spring 37 is accommodated in the engagement hole 36. One end of the ratchet spring 37 is locked to the protrusion 13 provided on the ratchet 6, and the other end is locked to the convex portion 38 of the connecting rod 30. Further, the other end side of the connecting rod 30 is assembled to a support shaft 39 that rotates together with the sub-latch 32.
[0021]
The escape lever 31 is rotatably attached to a support shaft 39 provided on the sub-latch 32, and is locked and fixed to a protrusion 41 provided on the sub-latch 32 by the elastic force of the escape fixing spring 40. Further, further displacement in the left rotation direction in the figure is restricted. Further, the escape fixing spring 40 can be bent and rotated in the clockwise rotation direction in the drawing. Therefore, when the latch 9 rotates counterclockwise in the figure, interference with the escape lever 31 can be prevented, and when the latch 9 rotates clockwise in the figure, the escape lever 31 can be hooked and the sub latch 32 can be rotated.
[0022]
The escape fixing spring 40 is a torsion coil spring, the coil portion is wound around the outer periphery of the support shaft 39, one end portion is locked to the outer peripheral edge of the sub-latch 32, and the other end portion is The escape lever 31 is locked to the outer peripheral edge.
[0023]
The sub latch 32 is a component that rotates the ratchet 6 by rotating around the support shaft 34. The sub latch 32 includes a first engaging portion 42 that is connected to the ratchet 6 via the connecting rod 30, and a concave second engaging portion 43 that is engaged with the sub ratchet 33.
[0024]
The sub ratchet 33 is a component that rotates around a support shaft 44 provided in the main body case 10, and constitutes a clutch mechanism (clutch means) together with the sub latch 32 and the sub ratchet (return) spring 45. The sub ratchet 33 has a first engagement portion 46 that meshes with the second engagement portion 43 of the sub latch 32 and a second engagement portion 47 that meshes with the output lever 25 of the unlatching actuator 4.
[0025]
The sub ratchet spring 45 is sub ratchet urging means that urges the sub ratchet 33 in a direction in which the first engagement portion 46 is engaged with the second engagement portion 43 of the sub latch 32. One end of the sub ratchet spring 45 is locked to the sub ratchet 33, and the other end is locked to a protrusion 48 provided on the main body case 10.
[0026]
The engagement of the second engagement portion 43 of the sub latch 32 and the first engagement portion 46 of the sub ratchet 33 is shown in the right side of the drawing with the sub ratchet 33 centered on the support shaft 44 against the urging force of the sub ratchet spring 45. Disengaged when rotating. When the rotation position of the sub latch 32 returns to the initial position, the second engagement portion 43 of the sub latch 32 and the first engagement portion 46 of the sub ratchet 33 are engaged with each other by the urging force of the sub ratchet spring 45.
[0027]
The sub-latch spring 35 is a sub-latch urging means that urges the sub-latch 32 in the clockwise direction about the support shaft 34, and the ratchet 6 is rotated by this elastic force to be in an unlatched state. The sub-latch spring 35 is a torsion coil spring, the coil portion is wound around the outer periphery of the support shaft 34 of the sub-latch 32, and one end portion is a protrusion provided on the main body case 10 (the fixing portion of the present invention 49 (corresponding to a member) and the other end is locked to the outer peripheral edge of the sub-latch 32.
[0028]
(Effects of Example)
Next, the operation of the vehicle door lock operating device 1 of this embodiment will be briefly described with reference to FIGS. Here, FIG. 2 thru | or FIG. 9 is the figure which showed the operating state of the door lock operating device for vehicles.
[0029]
(A) When a command for performing an unlatching operation is issued from the door lock switch or the like from the door closed state to the door open state, the door lock control device energizes the motor 3 in the unlatching actuator 4. Then, a rotational output is generated on the rotating shaft of the motor 3, and the sub ratchet 33 is connected to the support shaft via the output lever 25 fixed to the outer periphery of the output shaft 24 of the reduction gear mechanism as shown in FIGS. The first engagement portion 46 and the second engagement portion 43 of the sub-latch 32 are disengaged by rotating in the clockwise direction shown in the figure around 44.
[0030]
As described above, when the engagement between the sub latch 32 and the sub ratchet 33 is released, the sub latch 32 is moved by the spring force of the sub latch spring 35 in which the coil portion is fixed to the support shaft 34 of the sub latch 32 as shown in FIG. Then, it is rotated around the support shaft 34 in the clockwise direction shown in the figure. As a result, the connecting rod 30 is pushed upward through the support shaft 39 provided in the sub-latch 32. As a result, the ratchet 6 is rotated about the support shaft 11 in the left rotation direction in the figure, whereby the engagement between the engagement portion 12 of the ratchet 6 and the first engagement portion 16 of the latch 9 is released.
[0031]
As shown in FIGS. 3 and 4, when the latch 9 is disengaged from the ratchet 6, the latch 9 rotates about the support shaft 14 by the spring force of the latch return spring 20 to rotate in the counterclockwise direction as shown in the figure. It becomes. At this time, in order to prevent interference between the sub-latch 32 and the protrusion 19 of the latch 9, the escape fixing spring 40 is bent as shown in FIG. The escape lever 31 returns to its original position by the spring force (elastic deformation force) of the escape fixing spring 40 once the escape lever 31 has passed over the projection 19.
[0032]
On the other hand, the striker 7 is disengaged from the notch 15 of the latch 9 as shown in FIG. 1 and FIG. The part 8 is moved from the right end in the drawing to the left end in the drawing. Thereby, the door closed state by the vehicle door lock 2 is released, and the vehicle door lock 2 enters the unlatched state. Therefore, the vehicle door can be opened as shown in FIG.
[0033]
(B) As shown in FIG. 6 from the door open state to the door closed state, the striker 7 moves from the left end in the figure to the right end in the figure in the groove 8 of the main body case 10 by closing the door of the vehicle. It is engaged with the notch 15 of the latch 9. As a result, the striker 7 pushes the latch 9 around the support shaft 11 to rotate the latch 9 in the clockwise direction as shown in FIG. At this time, the escape lever 31 is pushed downward in the figure by the projection 19 of the latch 9, and accordingly, the sub-latch 32 is pushed around the support shaft 34 in the left rotation direction in the figure.
[0034]
By the above, the first engagement portion 46 of the sub ratchet 33 is engaged with the second engagement portion 43 of the sub latch 32 before the half-door state is brought about by the spring force of the sub ratchet spring 45, and the left rotation of the sub latch 32 is illustrated as follows. A spring force (elastic deformation force) is stored in a sub-latch spring 35 provided on the support shaft 34 of the sub-latch 32.
[0035]
As a result, the motor 3 in the unlatching actuator 4 can be moved even in the half door state of the vehicle door lock 2 in which the engaging portion 12 of the ratchet 6 and the second engaging portion 17 of the latch 9 are engaged as shown in FIG. When the sub ratchet 33 is driven and rotated clockwise in the figure, the door can be unlatched. Further, when the vehicle door is completely closed, the striker 7 pushes the latch 9 and the vehicle door lock 2 is fully latched as shown in FIG. 2, and the door is completely closed.
[0036]
Here, when the door is strongly closed and the striker 7 is overstroke, the engagement between the engagement portion 12 of the ratchet 6 and the first engagement portion 16 of the latch 9 is released, but the hand is released from the door. When the striker 7 returns to the normal position, the ratchet 6 returns to a fixed position where the engaging portion 12 and the first engaging portion 16 of the latch 9 are engaged with each other.
[0037]
[Effects of Examples]
As described above, the vehicle door lock operating device 1 according to this embodiment has the driving load F ₂ when the ratchet 6 is rotated by the spring force of the sub latch spring 35 provided on the support shaft 34 of the sub latch 32, that is, the door. The reaction force f is given a torque that exceeds the frictional force (friction coefficient: μ ₁ = 0.2) acting on the meshing contact portion between the engaging portion 12 of the ratchet 6 and the first engaging portion 16 of the latch 9. By applying a frictional force (friction coefficient: about μ ₂ = 0.2) to the meshing contact portion between the second engagement portion 43 of the sub latch 32 and the first engagement portion 46 of the sub ratchet 33, the final result is obtained. The unlatched operating force, that is, the driving load F ₂ that becomes the necessary rotation torque of the sub ratchet can be expressed by the following equation (2).
[0038]
[Expression 2]
F ₂ = f × μ ₁ × μ ₂
For this reason, the drive load F ₁ (by the first motor) without the sub ratchet mechanism 5 is about 6 kg to ₁₀ kg, but can be further reduced to about 1.2 kg to 2.0 kg. It is possible to easily reduce the size of the motor 3 of the actuator 4 and thus reduce the current. Therefore, the enlargement of the vehicle door lock operating device 1 itself can be suppressed.
[0039]
[Modification]
In this embodiment, the present invention is applied to a vehicle door lock operation for electrically unlatching a vehicle door lock 2 that keeps doors (front door, rear door, back door, etc.) installed in a vehicle such as a passenger car closed. Although applied to the apparatus 1, the present invention electrically unlatches the door lock 2 for a vehicle that keeps a door closed in a small vehicle other than a passenger car or a large vehicle such as a railway vehicle, a bus or a truck. The present invention may be applied to a vehicle door lock operating device.
[0040]
Moreover, you may apply this invention to the door lock operating device for buildings which electrically unlatch-operates the door lock of the door installed in buildings, such as not only a vehicle but a house and a store.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an overall configuration of a vehicle door lock operating device (Example).
FIG. 2 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
FIG. 3 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
FIG. 4 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
FIG. 5 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
FIG. 6 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
FIG. 7 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
FIG. 8 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
FIG. 9 is an explanatory view showing an operating state of the vehicle door lock operating device (Example).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle door lock operation apparatus 2 Vehicle door lock 3 Motor 4 Unlatch actuator 5 Sub ratchet mechanism (unlatch operation means)
6 ratchet 7 striker 9 latch 32 sub latch 33 sub ratchet 34 support shaft 35 sub latch spring 45 sub ratchet spring (sub ratchet return spring)
49 Protrusion (fixing member)

Claims (3)

A latch that forms at least a full latch state and a half latch state that meshes with the striker and an unlatched state that releases the striker by rotating about the support shaft, and in a direction that rotates the latch so as to be in the unlatched state Latch spring to be urged, and meshed with and latched with the latch when in the fully latched state and the half latched state, and rotated around the support shaft in the unlatched state to release the meshed state with the latch A door lock having a ratchet to be
A motor that generates rotational output;
An unlatching operation means for performing an unlatching operation for rotating the latch from the full latch state and the half latch state to the unlatching state by rotating the ratchet in response to the rotation output of the motor;
The unlatching operation means is connected to or interlocked with the ratchet, and rotates around the support shaft to rotate the ratchet;
A sub-latch spring serving as a drive source for urging the sub-latch in the direction of rotating the ratchet and disengaging the latch;
When engaged in the full latch state, the sub latch is engaged to lock the sub latch, and when the unlatch operation is performed, the rotation output of the motor is received to rotate around the support shaft, thereby releasing the engagement state with the sub latch. A door lock operating device comprising a sub-ratchet. In the door lock operation device according to claim 1,
The sub-latch spring is a torsion in which a coil portion is provided on a support shaft serving as a rotation center of the sub-latch, one end portion is held by a fixing member, and the other end portion is held by an outer peripheral edge of the sub-latch. A door lock operating device characterized by being a coil spring. In the door lock operation device according to claim 1 or 2,
The door lock operating device according to claim 1, wherein the sub ratchet includes a sub ratchet return spring that is biased toward a side meshing with the sub latch.

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