JP2001262897A - Door lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door lock device with an actuator for stopping a lock lever at a lock position reliably so that the lock lever does not reach a super lock position. SOLUTION: This door lock device consists of a motor 3 that rotates in forward and backward directions, a cam member 4 that rotates in linking with the motor 3, and a lock lever 5 that rotates via an engagement projection 15 that is engaged with a cam wall surface 11 that is in one piece with the cam member 4 and is displaced in a radius direction, and is provided with an actuator 1 that drives the motor 3 and rotates the lock lever 5 to an unlock position, a lock position, or a super lock position over the lock position, a concentric wall surface (non-rotary region) 12 for preventing the lock lever 5 from being rotated is provided at a position that is continuous to the cam wall surface 11 for rotating the lock lever 5 from the unlock position to the lock position by engaging with the engagement projection 15 of the cam member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a door lock device,
More particularly, the present invention relates to a door lock device provided with an actuator having a motor for moving a lock lever to an unlock position, a lock position, and a super lock position beyond the lock position.

[0002]

2. Description of the Related Art Conventionally, a door lock device is operated by driving a motor to move a lock lever to an unlock position,
Some include an actuator that is rotatable between a lock position and a super lock position (a position where the door lock state cannot be released even by operating the inner lock knob). In this door lock device, when the lock lever is rotated from the unlocked position to the locked position, the output shaft of the motor continues to rotate due to inertia even when the power supply to the motor is stopped, so that the lock lever is superimposed. There is a risk of pivoting to the locked position.

The present invention has been made in view of the above-mentioned conventional problems, and provides a door lock device provided with an actuator for surely stopping a lock lever at a lock position so as not to reach a super lock position. As an issue.

[0004]

SUMMARY OF THE INVENTION As means for solving the above problems, the present invention provides a motor that rotates forward and backward, a cam member that rotates in conjunction with the motor, and a radial direction that is integral with the cam member. And a lock lever that rotates through an engagement protrusion that engages with a cam wall that is displaced in a direction. The motor is driven to move the lock lever to an unlock position, a lock position, and a super lock position beyond the lock position. In a door lock device provided with a rotating actuator, the cam member may be engaged with the engagement protrusion to rotate the lock lever from an unlocked position to a locked position. A non-rotational area in which the lock lever is not rotated is provided.

In the above invention, the non-rotational area where the lock lever is not rotated is located at a position continuous with the cam wall surface of the cam member which engages with the engagement protrusion and rotates the lock lever from the unlock position to the lock position. After the lock lever is rotated to the lock position, the power supply to the motor is stopped, and even if the motor rotates excessively due to the inertia of its output shaft to rotate the cam member excessively, the cam member does not rotate. Does not rotate the lock lever. Thus, the lock lever can be reliably stopped at the lock position.

[0006] It is preferable that the non-rotational region has a concentric shape about the rotation axis of the cam member. Since the non-rotational area is concentric with the cam member, it does not displace in the radial direction even when the cam member rotates. Thus, the lock lever is not rotated.

[0007] It is preferable that a contact of a wire for supplying electric power to the motor is provided integrally with the lock lever, and when the lock lever is rotated to the lock position, the contact makes the wire short-circuited. As a result, after the lock lever rotates to the lock position, the wiring is short-circuited, the power supply to the motor is stopped, and a brake circuit is formed, so that the lock lever does not further rotate.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an actuator 1 of a door lock device according to the present invention. The actuator 1 includes a housing 2, a motor 3, a cam member 4, a lock lever 5, and a wiring 6. The housing 2 includes the motor 3, the cam member 4, and the lock lever 5.
And the wiring 6.

The motor 3 is supplied with electric power via the wiring 6 by a control circuit (not shown) mounted on the vehicle, and rotates forward and backward. The motor 3 rotates the cam member 4 via a rotation mechanism 7. The rotating mechanism 7 includes a worm attached to a drive shaft of the motor 3 and a worm gear formed on the outer periphery of the cam member 4.
To tell.

As shown in FIG. 2, the cam member 4 is rotatable about a rotation shaft 8 in a normal and reverse direction, and is disposed inside a cylindrical outer wall 9 forming an outer peripheral wall and inside the outer wall 9. Cam 10. The cam 10 has a cam wall surface 11a,
b, c, d, and concentric circular wall surfaces 12 which are concentric arc concave surfaces and convex surfaces having radii r ₁ and r ₂ respectively about the rotation axis 8.
a and b. The cam wall surface 11a is
Displaced to the inner peripheral surface up to a radius r ₁ from the rotary shaft 8 is a concave surface continuous with one end of the concentric walls 12a. The cam wall surface 11b is a concave surface that is displaced in the radial direction from the other end of the concentric wall surface 12a to the outer peripheral surface of the rotating shaft 8. Meanwhile, the cam wall 11c is a schematic plan continuous to one end of said from the rotary shaft 8 is displaced to a radius r ₂ the concentric wall 12b from the outer peripheral surface of the rotary shaft 8. The cam wall surface 11d is a convex surface that is displaced in the radial direction from the other end of the concentric wall surface 12b to the inner peripheral surface of the outer wall 9. These surfaces 11a, 12a, 11b, 11c, 12b and 11d are arranged in a substantially S-shape in a plane. When the driving force is not transmitted from the motor 3, the cam member 4 is urged by a spring (not shown) inside the rotating mechanism 7, so that the state shown in FIG. 1 (initial state) Is returned to.

The lock lever 5 comprises a shaft portion 13 and a substantially fan-shaped lock plate 14. The shaft portion 13 is directly connected to an external door lock mechanism (not shown), and is controlled by an angle at which the shaft portion 13 rotates. The door lock device is in the unlock position, the lock position, and the super lock position. When the lock lever 5 is not rotated, the lock lever 5 is fixed to any one of an unlock position, a lock position, and a super lock position by a biasing force such as a spring.

As shown in FIG. 2, the lock plate 14 comprises a small sector 14a and a large sector 14b, and a raindrop projecting in the direction of the cam member 4 is provided on the outer peripheral edge of the lower surface of the small sector 14a. An engaging projection 15 having a cross section of a shape is provided, and a movable contact piece 16 is attached to the outer peripheral edge of the upper surface of the large sector 14b.

The engaging projections 15 are formed on the cam walls 11a to 11d of the cam 10 of the cam member 4, the concentric walls 12a,
The lock plate 14 is slidably engaged with the lock plate 12b and receives the action force from the cam wall 11 by the rotation of the cam member 4 to rotate the lock plate 14.

The movable contact piece 16 is made of a conductor,
Base 16a and two arms 16b extending from the base
Consists of At the tip of the arm 16b, cylindrical movable contacts 17a and 17b are provided. The movable contact 1
Current flows through the movable contact piece 16 by sliding contact with the wiring 6 described below.

The wiring 6 is disposed on the inner surface of the cover of the housing 2 and supplies an electric current to the motor 3 by a controller 18 provided outside as shown in FIG. The wiring 6 includes wiring portions 6a, 6b, 6c
And terminals a, b, and c, and arc portions 19a, b, and c. The arc portion 19a is formed in an arc shape centered on the shaft portion 13 so that the movable contact 17a slides, while the arc portions 19b and 19c are formed in an arc shape such that the movable contact 17b slides. 13 is formed in an arc shape. The wiring portion 6a connects the arc portion 19a to the terminal a via the motor 3. The wiring portion 6b has an arc portion 19
b is connected to the terminal b, and the wiring portion 6c connects the arc portion 19c to the terminal c. A cutting portion 20 is provided between the arc portions 19b and c. When the movable contact 17b is located at the cutting portion 20, the motor 3 is not energized. A diode 21a is connected between the wiring portions 6a and 6c so that a current flows from the terminal c to the terminal a, and a diode 21a is provided between the wiring portions 6a and 6b from the terminal a side. The diode 21b is connected so that a current flows to the terminal b. The controller 18 receives a signal for switching between unlocking, locking, and super-locking from a key cylinder provided in each door of a driver's seat or a passenger's seat or a switch in the vehicle, and receives the signals from the terminals a, b, and c. The connection between the battery and the battery is switched.

Next, the operation of the door lock device having the above configuration will be described.

First, as shown in FIG. 3, when the user performs a locking operation while the door lock device is in an unlocked state, the terminal b is connected to the + terminal of the battery by the controller 18, and the terminals a and c are connected. Connected to the terminal, a current flows from the terminal b to the terminal a via the movable contact piece 16 for 0.5 second, and causes the motor 3 to rotate forward. As a result, the cam member 4 rotates clockwise, and the engagement protrusion 15
Engages with the cam wall surface 11a of the cam member 4 and receives an acting force;
The lock lever 5 is rotated in the counterclockwise direction so as to interlock with the cam member 4, and as shown in FIG.
Is rotated to the lock position. At this time, the movable contact 17
When b is connected to the arc portion 19c, the motor 3 is short-circuited and the motor 3 is braked and stopped. At this time, as shown in FIG. 5, even if the cam member 4 rotates extra due to the inertia of the output shaft of the motor 3, the concentric wall surface 12a
Since it is not displaced in the radial direction, no acting force is applied to the engagement projection 15 and the lock lever 5 is not rotated. As a result, the lock lever 5 can be maintained at the locked position without fail.

Further, when the user performs the super lock operation, as shown in FIG. 6, the terminals b and c are connected to the + terminal of the battery by the controller 18 and the terminal a is connected to the-terminal.
The terminal 3 is connected to the terminal, and a current flows from the terminal c to the terminal a via the movable contact piece 16 for 0.5 second, thereby causing the motor 3 to rotate forward. Thereby, the lock lever 5 is rotated from the lock position to the super lock position shown in FIG. The lock lever 5 is forcibly stopped after rotating to the super lock position. After a lapse of 0.5 seconds, when the current supply is stopped, the cam member 4 is returned to the initial position by the urging force of the spring as shown in FIG. When the movable contact 17b of the movable contact piece 16 is stopped at the position of the cutting portion 20 due to some abnormality during the rotation to the above-described super lock position, the current flows from the terminal c via the diode 21a. The motor 3 flows to the terminal a and rotates forward.

When the super lock operation is performed in the unlocked state, first, the terminal b is connected to the + terminal of the battery by the controller 18 as in the case of the lock operation, and the terminals a and c are connected. Is connected to the negative terminal, and the current is supplied from the terminal b to the movable contact piece 16 for 0.5 second.
, The terminals b and c are connected to the + terminal of the battery, the terminal a is connected to the-terminal, and the current is zero. For 5 seconds, the current flows from the terminal c to the terminal a via the movable contact piece 16 to enter a super lock state.

Conversely, when the user performs an unlocking operation from the super lock state, the terminal a is connected to the + terminal by the controller 18 as shown in FIG.
Is connected to the-terminal, and current is supplied for 0.5 seconds. At this time, first, the current flows from the terminal a to the terminal c via the movable contact piece 16 to rotate the motor 3 in the reverse direction. As a result, the cam member 4 rotates in the counterclockwise direction, and the engagement protrusion 15 receives the acting force from the cam wall surface 11c to rotate the lock lever 5. The lock lever 5 exceeds the lock position,
When the movable contact 17b contacts the arc portion 19b, the current becomes
As shown in FIG. 8, the motor 3 flows from the terminal a to the terminal b via the movable contact piece 16, and the motor 3 is continuously rotated in the reverse direction. When the lock lever 5 rotates to the unlock position, the lock lever 5 is forcibly stopped. When the supply of current is stopped after 0.5 seconds, the cam member 4 rotates clockwise again to the state shown in FIG. 3 by the urging force of the spring. At this time, the lock lever 5 is maintained at the unlock position.
When the movable contact 17b of the movable contact piece 16 is stopped at the position of the cutting portion 20 due to some abnormality, the current flows from the terminal a to the terminal b via the diode 21b.
And the motor 3 is rotated forward.

[0022]

As is apparent from the above description, according to the present invention, since the non-rotational area is provided in the cam member, the power supply to the motor is stopped and then the extra power is generated due to the inertia of the output shaft of the motor. Even if the cam member rotates, the lock lever does not further rotate.

In particular, a contact of a wire for supplying electric power to the motor is provided integrally with the lock lever, and when the lock lever is turned to the lock position, the contact short-circuits the wire, thereby securely locking the lock lever. It is possible to stop at the position.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an actuator of a door lock device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the cam member and the lock lever of FIG. 1 are assembled.

FIG. 3 is a sectional view showing an example of the operation of the actuator shown in FIG. 1;

FIG. 4 is a sectional view showing an example of the operation of the actuator shown in FIG. 1;

FIG. 5 is a sectional view showing an example of the operation of the actuator shown in FIG. 1;

FIG. 6 is a sectional view showing an example of the operation of the actuator of FIG. 1;

FIG. 7 is a sectional view showing an example of the operation of the actuator shown in FIG. 1;

FIG. 8 is a sectional view showing an example of the operation of the actuator shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Actuator 3 Motor 4 Cam member 5 Lock lever 11 Cam wall surface 12 Concentric wall surface
(Non-rotating area) 15 Engagement protrusion

Claims (3)

[Claims] 1. A motor that rotates forward and backward, a cam member that rotates in conjunction with the motor, and an engagement protrusion that engages with a cam wall that is integrally displaced with the cam member and that is displaced in a radial direction. A door lock device comprising a lock lever, the actuator being configured to drive the motor to rotate the lock lever to an unlock position, a lock position, and a super lock position exceeding the lock position. A non-rotational area in which the lock lever is not rotated is provided at a position that is continuous with the cam wall surface that engages with the engagement protrusion and rotates the lock lever from the unlock position to the lock position. Door lock device. 2. The door lock device according to claim 1, wherein the non-rotational area has a concentric shape about a rotation axis of the cam member. 3. A contact point of a wire for supplying power to the motor is provided integrally with the lock lever, and when the lock lever rotates to the lock position, the contact turns the wire into a short-circuit state. The door lock device according to claim 1 or 2, wherein