JPH0726529Y2 - Door lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a door lock device.

(Prior Art) A door lock device includes a door lock mechanism, a link mechanism that operates the door lock mechanism, and an actuator that operates the link mechanism, and holds a locking arm that constitutes the link mechanism in an unlocked position. A turnover spring is used to do this.

(Problems to be solved by the present invention) In the conventional door lock device, since many links are interposed between the turnover spring and the output shaft of the actuator, the output of the actuator is locked and unlocked by the locking arm. It is necessary to overcome the resistance of the turnover spring that holds the position and the resistance of the link. However, since there are many links interposed between the actuator and the turnover spring, the transmission efficiency thereof is also poor, and the actuator becomes large in size to compensate for the above-mentioned resistance force and poor transmission efficiency. The miniaturization of the actuator goes against the demand for miniaturization of the device, and improvement is desired.

Therefore, it is an object of the present invention to solve the above-mentioned problems of the prior art.

(Means for Solving the Problems) In order to solve the problems described above, the present invention is a technical means for fixing a locking arm to an output shaft of an actuator, and disposing a turnover spring on the locking arm and the housing. To use.

(Operation) Since the output of the actuator directly moves the turnover spring via the locking arm, the output loss is extremely small and it is not necessary to upsize the motor.

(Example) An example in which the concept of the present invention is applied to a door lock device will be described below. The door lock device 1 has a release lever 3 pivotally supported by a housing 2. This release lever 3
It is rotatable about a fulcrum 26. This fulcrum 26 is
The release lever 3 is the center of rotation of the pole of the door lock operating part (not shown), and the release lever 3 is interlocked with the pole via the pin 27. The position of the release lever 3 shown in FIG. 1 is a locked state of the door lock, and an unlocked state can be obtained by rotating the lever 3 counterclockwise. When the outside handle is operated, a force acts in the direction indicated by 29, and the rod 4 rotates the lever 30 counterclockwise about the fulcrum 31. When the inside handle is operated, a force acts in the direction indicated by 28 to rotate the lever 30 counterclockwise about the fulcrum 31. The counterclockwise rotation of the lever 30 pushes the open lever 5 downward. The downward movement of the open lever 5 is caused by the protrusion 6 of the open lever 5 pushing the end portion 7 of the release lever 3 and rotating the release lever 3 counterclockwise about the fulcrum 31 in the counterclockwise direction. , Unlock the door lock (see Fig. 2).

The door is locked in order to prevent the door from being opened accidentally while the vehicle is traveling, but generally, by pushing the locking button 8 and rotating the locking arm 9 interlocking with the locking button 8 clockwise, Make this door lock. A part of the locking arm 9 is connected to the open lever 5 through an elongated hole. When the locking arm 9 is in the A position, the lowering of the open lever 5 allows the projection 6 thereof to come into contact with the end 7 of the release lever 3. However, when the locking button 8 is pushed, the locking arm 9 is rotated clockwise with the pin about the pin 10 and moved to the position B, the open lever 5 moves in the direction of the arrow C, and the projection 6 is released. Separate it from the end 7 of the lever 3 (see FIG. 3). As a result, even if the handle is operated and the open lever 5 is lowered, the projecting piece 6 and the end portion 7 do not come into contact with each other, and the door is locked (see FIG. 4). .

The keyless lock mechanism will be described. With the door open, press the locking button 8 to open the locking arm 9
Is rotated clockwise so that the protruding piece 6 does not face the end portion 7 of the release lever 3. When the outside or inside handle is operated, the open lever 5 is pushed down and the state shown in FIG. 5 is obtained. If you close the door in this state,
Although the relacing lever 3 is rotated counterclockwise, the step portion 11 of the open lever 5 and the projecting piece 12 of the release lever 3 are idled, and the release lever 3 is freely rotated counterclockwise. , The door is kept locked (see Fig. 6). After the door is closed, the release lever 3 is brought into the state shown in FIG. 5 by the spring, and returns to the state shown in FIG. 3 when the operation from the handle side is stopped.

Next, the self-cancelling mechanism will be described. While the door is open, the locking button 8 is pushed to rotate the locking arm 9 clockwise, and the open lever 5 is rotated in the direction C shown in FIG. To do. When the door is closed without operating the outside or inside handle, the release lever 3 rotates counterclockwise by a pole (not shown). This movement causes the protruding piece 12 of the release lever 3 to come into contact with the stepped portion 11 of the open lever 5 to rotate the open lever 5 in the clockwise direction as shown in FIG. As a result, the locking button 8 is returned to its original position, and the locking arm 9 moves to the open lever 5
Rotate counterclockwise around the pin 10 through the long hole. That is, since the state shown in FIG. 1 is restored, when the handle is operated to open the door, the protrusion 6 of the open lever 5
Pushes down the end 7 of the release lever 3 and allows the door to open.

The key operation will be described with reference to FIG. A key operation lever 13 is rotatably supported by the pin 10, and a protrusion 14 thereof is arranged in parallel with a protrusion 15 of the locking arm 9. This lever
13 is connected to the key cylinder via a rod. When the key is operated in the locking direction, the key operating lever 13 is rotated clockwise, and the abutment between the protrusion 14 and the protrusion 15 moves the locking arm 9 from the position A to the position B to lock the door. When the locked state is secured and the key operation is stopped, the lever (B) returns to the A position by the action of the spring attached to the key cylinder side. That is, in a state where the locking button 8 is pushed down, in other words, the projecting piece 6 of the open lever 5 and the end portion 7 of the release lever 3 are not opposed to each other, and the outside or inside handle is operated. , The door remains closed. When the key is rotated in the unlocking direction, the stepped portion 14 'pushes the projection 15 and the locking arm 9
Is rotated counterclockwise to the state shown in FIG. The first
Even if the key operation lever 13 is rotated to the position B'by the key in the state shown in the figure, the stepped portion 14 'only comes close to the protrusion 15 and the locking arm 9 does not rotate.

In addition to the above-mentioned manual operation, the pin 10 is electrically rotated in response to a command signal from the driver to move the locking arm 9 from the position A to the position B (or vice versa) to lock and unlock. A lockable state is obtained. Referring to FIG. An operating lever 17 having an arm portion 16 is fixed to the pin 10. Insert the wheel gear 18 into the pin 10 and
The pair of pins 19 and 20 that are planted in the arm are opposed to the arm portion 16.

On the other hand, an annular groove 21 is provided in the housing 2 '. This groove 21
Is, as shown in FIG. 10, partly opposite wall surfaces 22,
It is narrowed by 23. Groove coil spring 24
It is put in 21, and its end is brought into contact with the shoulders of the wall surfaces 22, 23. In addition, the projecting piece 25 protruding from the lower surface of the wheel gear 18 is attached to the wall surface.
Position between 22 and 23. As a result, for example, when the wheel gear 18 rotates clockwise as seen in FIG.
Presses the right end of the spring 24 and contracts the spring 24. At this time, the left end of the spring 24 comes into contact with the shoulders of the wall surfaces 22 and 23 to enable the compression of the spring 24. When the wheel gear 18 rotates, the pin 19 abuts on the arm portion 16 to rotate the operating lever 17 and the pin 10, and the locking arm 9 is rotated.
It is possible to move from position A to position B. When the wheel gear 18 rotates in the opposite direction, the protrusion 25 causes the spring 24 to compress in the counterclockwise direction while bringing the right end of the spring 24 into contact with the shoulders of the walls 22 and 23, and the pin 20 causes the operating lever 17 to move. pin
Rotate 10 to move the locking arm 9 from the B position to the A position. By using the annular groove 21 as described above, the total length of the spring 24 can be lengthened and sufficient bending can be secured.

The wheel gear 18 rotatably supported by the pin 10 meshes with a worm gear 27 directly connected to the electric motor 26,
By controlling the energization of 26, the rotation direction of the wheel gear 18 is controlled. Generally, when the lead angle γ ₀ of the worm gear becomes larger than the friction angle φ,
Allows transmission of rotational torque to 27. Therefore, in this example, the advance angle is set to be equal to or greater than the friction angle (φ = 8.53 °) by utilizing the relationship of μ (friction coefficient) = tan φ. That is, the friction coefficient μ = 0.1 to 0.15 and the friction angle φ = 5.71 ° to 8.53 ° between the worm gear 27 made of phosphor bronze and the wheel gear 18 made of resin are set, and the friction angle is set to 8.53 or more. Allow the rotation of. The advance angle (γ ₀ ) of the worm gear 27 is selected by, for example, rotating the wheel gear 18 by a door lock operation by the driver using the electric motor 16, and immediately after the operation, the wheel gear 18 is rotated by the spring 24. Allows return to original position and subsequent manual operation. In other words, it enables manual operation and then electric operation or electric operation and then manual operation. In addition, since the operating lever 17 and the wheel gear 18 are completely separated during manual operation, the arm portion 16 only idles between the pins 19 and 20, and does not drag the motor portion.
It can be operated lightly and the operation feeling is good.

As shown in FIG. 12, the pin 10 fixed to the actuating lever 17 actuated by the motor 26 in the housing 2 ′ has a stepped portion and a square portion at its tip, and the stepped hole 32 of the housing 2 is provided. Inserted in. The outer peripheral surface of the stepped hole 32 serves as a bearing portion 34 that receives the hole 33 of the key operating lever 13 on its outer peripheral surface. The square portion of the pin 10 protruding from the bearing portion 34 is inserted into the hole 35 of the locking arm 9 having the same shape. The locking arm 9 is seated on the top surface of the bearing portion 34. Since the bearing portion 34 for the key operation lever 13 is formed integrally with the housing 2, a separate bearing is not required, and the mounting portion of the locking arm 9 does not extend laterally outward.

As shown in FIGS. 12 and 13, a turnover spring 36 for holding the locking arm 9 in the locking / unlocking position is provided with a recess 37 in the housing 2 near the bearing portion 34, and a hole in the locking arm 9 that is almost opposed to the recess 37. 38 and lock it. In this example, since the output shaft 10 is directly coupled to the locking arm 9, the rotational force from the motor is efficiently transmitted to the turnover spring, so that the operating force can be small. This allows the motor 26 to be downsized and allows the entire device to be made compact.

As already understood from the description of FIG. 1, the fulcrum 26 which is the rotation center of the release lever 3 also serves as the rotation center of the pole of the door lock mechanism (not shown), and the pin 27 moves the pole to the locking / unlocking position. Thus, the door lock mechanism is housed in the housing 2. The various levers and arms as described above are arranged on the outer surface of the housing 2. On the other hand, an actuator that rotates the output shaft 10 including the motor 26 and the like is housed in an extension portion of the housing 2 for the door lock mechanism. In addition, the motor
26 and the worm wheel 18 are arranged in parallel, and the output shaft 10
The thickness of the entire apparatus can be reduced as compared with the case where the motor 26 is directly connected to the motor 26 and the motor is placed in a right angle relationship with various levers and arms.

In this example, since the turnover spring is arranged on the actuating lever, there is no transmission loss of output, the rotational torque of the wheel gear 18 is transmitted to the electric motor 26 via the worm 27, and the reverse rotation of the motor 26 is enabled. There is. The electric motor 26 rotates the operating lever 17 to rotate the locking arm 9
Is moved to the locking position (B) and the unlocking position (B ') shown in FIG. 1, but the operating lever 17 is moved to these positions (B, B').
Arrange a stopper 39 to stop. The function of the stopper 39 will be described with reference to FIG. Although only one stopper 39 is shown in FIG. 14, the function of the other stopper is the same, so that the figure and its description are omitted.

To operate the electric motor 26, the wheel gear 18 is rotated through the worm 27, and the pin 19 moves the operating lever 17 to the pin 10.
Rotate with. At this time, the return spring 24 bends and stores energy for returning the wheel gear 18 to the neutral position. In this example, the operating lever 17 has the normal stop position 40.
Then, the operating lever 7 further advances and moves to the overtravel position 41, and the stopper 39 is elastically deformed.
That is, the stopper 39 is elastically deformed by an amount corresponding to the overtrapel. The stopper 39 is made of a solid or hollow body such as rubber or synthetic resin that allows such elastic deformation. The elastic force of the stopper 39 is applied when the electric motor 26 is turned off, that is, when the wheel gear is returned to the neutral position. It works to push back the operating lever 17 together with the spring 24 to the normal locking / unlocking position.
The assisting force from the stopper 39 can reduce the biasing force of the spring 24 and the output of the electric motor 26 accordingly. Note that the relationship between the wheel gear 18 and the motor reverse torque is
Shown in Figure 15.

The relationship between the output shaft 10 and the housing 2 is shown in FIG.
This will be described in more detail with reference to FIG.

The output shaft 10 fixed to the operating lever 17 has a large shaft diameter 40
And a small shaft diameter portion 41. on the other hand,
The hole 32 of the housing 2 comprises a large opening 42 for receiving the large shaft diameter portion 40 and a small opening 43 for receiving the small shaft diameter portion 41. The locking arm 9 is fixed to a small shaft diameter portion 41 protruding from the housing 2, and the key operation lever 13 is rotatably supported by the bearing portion 34 of the housing 2.

When the output shaft 10 is attached to the hole 32 of the housing 2, the O-ring 44 is fitted to the small shaft diameter portion 41 of the output shaft 10 and output from the inside of the housing 2 so that the small shaft diameter portion 41 protrudes from the housing 2. Insert the shaft 10 into the hole 32. When the output shaft 10 is inserted into the hole 32, the step portion of the hole 32 faces the step portion of the output shaft 10 via the O-ring 44. Thus, the output shaft
The movement of the housing 10 with respect to the housing 2 can be restricted. This is useful to ensure correct movement of the actuating lever 17. Further, since the O-ring 44 may be attached to the output shaft 10 and attached to the hole 32 of the housing 2, the assembling work is extremely easy.

In the example shown in FIGS. 9 and 14, the pin 19 is planted on the wheel gear 18, but in order to rotate the operating lever 17,
As shown in the figure, the wheel gear 18 has a semi-circular rising portion.
45 is provided as a convex portion instead of the pin 19. The end of the convex portion 45 can come into contact with the arm 16 of the operating lever 17. Electric motor 26
When electricity is applied to the wheel 18, the wheel 18 rotates via the worm 27. One end of the convex portion 45 comes into contact with the arm 16 according to the rotation direction of the wheel gear 18, and while compressing the return spring 24, the operating lever 17 is moved to the unlocked or unlocked position, and the pin 10 serving as the output shaft is moved. Move the link mechanism. Actuating lever 17
When the motor occupies the locked or unlocked position and the motor 26 is de-energized, the release urging force of the compressed return spring 24 causes the wheel gear 18, the worm 27 and the motor 26 to rotate in the reverse direction and the wheel gear 18 to the neutral position. Return to. Wheel gear 18
When is returned to the neutral position, as shown in FIG. 17, a gap 46 is left between the end of the convex portion 45 and the arm 16. When the electric motor 26 is energized, the gap 46 immediately sets the rotational speed of the motor to the rated value, and when the convex portion 45 comes into contact with the arm 16 of the operating lever 17, the inertia energy of the motor output shaft causes the inertia energy of the deceleration portion and the door. Increase the static friction of the lock mechanism etc. That is,
When the convex portion 45 contacts the arm 16 of the actuating lever 17, the rotational inertia energy of the motor can be transmitted to the arm 16, so that the motor can be downsized.

(Effect) In the present invention, since the motor output is made small, the operating hammering sound at the locking / unlocking position of the locking arm can be made small. or,
Since the recess is used to lock the turnover spring to the housing, there is no galling, and the use of a resin housing can reduce the operating resistance of the turnover spring, and at the same time the sliding part No rusting and stable performance can be maintained over the long term.

[Brief description of drawings]

FIG. 1 is a front view showing this example, FIG. 2 is a partial front view showing a state in which an open lever is operating a release lever, and FIGS. 3 and 4 are partial front views showing an idle state of a locking mechanism. 5 and 6 are partial front views showing the keyless lock mechanism, FIGS. 7 and 8 are partial front views showing the self-cancelling mechanism, FIG. 9 is an exploded view of the actuator portion, and FIG. 10 is Fig. 11 is a plan view showing the return spring, Fig. 11 is a side view of the worm, Fig. 12 is an exploded perspective view of the mounting portion of the output shaft, Fig. 13 is a side view showing the mounting of the turnover spring, and Fig. 14 is an operating lever. And FIG. 15 is a plan view showing the relationship between the wheel rotation angle and the motor reverse torque, FIG. 16 is a cross-sectional view of the output shaft portion, and FIG. 17 is a plan view of the actuator section. . In the figure: 1 ... Door lock device, 2, 2 '... Housing,
3 ... Release lever, 5 ... Open lever, 8 ...
Locking button, 9 ... Locking arm, 10 ... pin, 13 ... Key operating lever, 15 ... Projection part, 17 ... Actuating lever, 24 ... Return spring, 26 ... Motor, 34 ...
… Bearing, 36 …… Turnover switch, 39 …… Stopper.

Claims (2)

[Scope of utility model registration request] 1. A door lock mechanism housed in a housing, a link mechanism arranged on an outer wall of the housing to operate the door lock mechanism, and an actuator housed in the housing and operating the link mechanism. The actuator includes an electric motor, and a worm wheel coupled to a rotating shaft of the electric motor via a worm;
An operating lever for transmitting the rotational torque from the worm wheel to the output shaft, the output shaft of the actuator is integrally connected to the locking arm of the link mechanism connected to the door locking knob, and the locking arm and the housing are further connected. Door lock device with a turnover spring arranged between and. 2. The door lock device according to claim 1, wherein one end of the turnover spring is locked in a recess provided in a synthetic resin housing.