JP2001241243A - Door lock driving apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actuator which can efficiently transform a driving force of a motor into a rotational power of an output shaft. SOLUTION: When a dead lock(DL) which can block unlocking operation of an actuating lever 4 to block manual unlocking of a door is actuated, in addition to a drive SP 9 as a power transmitting member for driving a DL lever 5 toward a DL position, a spring guide 8 which can press the DL lever 5 toward the DL position is provided if operating load of the DL lever 5 by spring force of a return SP 6 and a moderation SP 7 is so large that spring force of the drive SP 9 alone cannot press the DL lever 5 toward the DL position. As a result, the spring force of the drive SP 9 can be set to a small value. By virtue of this setting, output torque loss caused by sliding frictional resistance generated by the spring force can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock driving device for driving a door lock for locking or unlocking a door, and more particularly to a lock state for locking the door lock and an unlocking state for unlocking the door lock. The present invention relates to a door lock actuator that can be switched between a locked state and a deadlock state that prevents an unlocking operation by a manual operation.

[0002]

Prior Art FIGS. 14 to 16 show prior art.
As shown in FIG. 1, a rotating body 102 that is driven to rotate by a motor 101 via a gear reduction mechanism, and an output shaft 1 that transmits a driving force of the motor 101 to a door lock to operate the door lock.
Operating lever 104 having an operating lever 21;
4 and a lever driving pin 108 for driving the deadlock lever 105
And a drive spring 109 for urging the lever drive pin 108 toward the deadlock lever 105 (Japanese Patent Application No. 11-28).
No. 8280, filed on Oct. 8, 1999).

The deadlock lever 105 is integrally provided with a projection 133 for locking the locked portion 125 of the operating lever 104 during the deadlock operation and preventing the unlocking operation of the operating lever 104. ing. The deadlock lever 105 has a lever driving pin 108.
Are provided with two engaging walls 137 and 138. A moderation spring 1 is provided at one end of the deadlock lever 105 to hold the rotational position of the deadlock lever 105 at the deadlock position and other positions, respectively.
07 is attached. Also, the deadlock lever 10
5, a return spring for DL 106 that urges the deadlock lever 105 in a direction of returning to the initial position.
Is installed.

Here, the rotating body 102 rotates from the neutral point to the door locking position (locked state) or the anti-theft position (deadlock state), or from the neutral point to the door unlocking position (unlocked state). Rotate. The rotating body 10
2 is configured to return to the neutral point by the spring force of the return spring 103 when the rotation drive by the motor 101 ends. One end of the return spring 103 is engaged with a case protrusion 122 provided on the bottom wall surface of the case 110, and the other end is connected to the case 110.
Are locked to a case protrusion 123 provided on the bottom wall surface of the.

[0005] A projection 114 is provided on the front surface of the rotating body 102, and a projection 115 surrounded by a stopper cushion 116 is provided on the back surface of the rotating body 102. When the rotating body 102 rotates in the locking direction, the stopper cushion 116 collides with a lock stopper 118 formed at one circumferential end of an arc-shaped convex wall 117 provided on the bottom wall of the case 110, and rotates. Body 10
2 is configured to collide with an unlock stopper 119 formed at the other end in the circumferential direction of the convex wall 117 when rotating in the unlock direction.

[0006]

Here, in the above vehicle door lock driving device, the deadlock lever 105 is operated in order to efficiently transmit the driving force of the motor 101 as the rotation power of the output shaft 121. It is necessary to reduce the spring force of the drive spring 109 for urging the force in the direction to reduce the sliding friction resistance generated by the spring force. However, the drive spring 109 must be larger than the force for maintaining the moderation between the moderation spring 107 and the return spring 106 in order to operate the deadlock lever 105. However, in order to maintain the deadlock state, the spring force of the moderation spring 107 is reduced by the return spring 10.
3, the spring force of the drive spring 109 cannot be reduced.

On the other hand, at the time of the lock operation, the drive spring 109 must bend itself to get over the engaging wall 138 of the deadlock lever 105, and at the time of releasing the deadlock, the detent spring 107 by the spring force of the drive spring 109. To move the deadlock lever 105 to move the projection 133 off the track on which the locked portion 125 of the operation lever 104 rotates in the unlock direction. Accordingly, even if an attempt is made to reduce the spring force of the drive spring 109 in order to reduce the output torque loss due to the sliding friction resistance generated by the spring force of the drive spring 109, the required spring force of the moderation spring 107 cannot be reduced. Problems arise.

When the deadlock is activated, the lever driving pin 108 is engaged with the engaging wall 1 of the deadlock lever 105.
Since the fail-safe projection 133 is provided on the deadlock lever 105 when the vehicle does not climb over the deadlock lever 38, the deadlock lever 105 becomes heavier and more space is required. When the deadlock lever 105 becomes heavy, the spring force of the DL return spring 106 that holds the initial position of the deadlock lever 105 must be increased so that the deadlock lever 105 does not malfunction due to vibration. D
A problem arises in that the output torque loss due to the spring force of the L return spring 106 increases.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a door lock driving device capable of efficiently transmitting the driving force of a motor as the rotational power of an output shaft. Another object of the present invention is to provide a door lock driving device in which setting of the urging force of the power transmitting elastic body and the second elastic body is very easy.

[0010]

According to the first aspect of the present invention, during deadlock operation, the motor is energized to rotate the rotating body in the locking direction. As a result, the deadlock lever is driven to the deadlock position. Thus, the rotation of the operating lever in the unlocking direction is prevented by the presence of the deadlock lever on the track on which the operating lever rotates in the unlocking direction. This results in a deadlock state in which unlocking of the door lock by manual operation can be prevented.

On the other hand, when the deadlock is released, when the rotating body rotates in the unlocking direction by energizing the motor, the deadlock lever is returned to the initial position by the first elastic body, the power transmitting elastic body and the power transmitting means. Will be returned. At the same time, the operating lever rotates in a direction for unlocking the door lock and is positioned in the unlocked state. When the energization of the motor is completed, the rotating body returns to the neutral point in the unlocked state by the neutral point returning means, but the operating lever is released from the drive connection state with the rotating body, so that the operating lever is in the unlocked position. stay.

As described above, at the time of the deadlock operation, in addition to the power transmitting elastic member, the first power transmitting member for driving the deadlock lever to the deadlock position side.
When the operating load of the deadlock lever due to the urging force of the elastic body and the second elastic body is large and the deadlock lever cannot be pushed to the deadlock position side by the urging force of only the power transmission elastic body, the power transmission elastic body Power transmission means is provided that can push the deadlock lever to the deadlock position side by assisting the urging force.

As a result, the urging force of the power transmitting elastic body can be reduced, so that the sliding friction resistance generated by the urging force of the power transmitting elastic body is suppressed, and the output torque loss of the door lock driving device is suppressed. Thereby, the driving force of the motor can be efficiently transmitted as the rotational power of the output shaft. Further, since the urging force of the power transmitting elastic body can be reduced, the physical size of the power transmitting elastic body can be reduced, and the physical size of the door lock driving device can be reduced.

According to the second aspect of the present invention, the power transmission means is provided with a power transmission projection for driving the deadlock lever to the deadlock position or the initial position, thereby providing the first elasticity. When the operating load of the deadlock lever is large due to the urging force of the body and the second elastic body, and the deadlock lever cannot be pushed by the urging force of only the power transmission elastic body, the deadlock lever is moved to the power transmission projection of the power transmission means. Since the power can be driven by the unit, the urging force of the power transmitting elastic body and the second elastic body can be easily set.

According to the third and fourth aspects of the present invention, when the power transmission elastic member does not move to the home position during the deadlock operation, the deadlock lever is initially set when the deadlock is released. The weight of the deadlock lever can be reduced by installing the fail-safe protrusion for driving to the position of the deadlock to release the deadlock on the power transmission means integrated with the rotating body. Can be.

Therefore, it is not necessary to increase the urging force of the first elastic body for urging the deadlock lever to the initial position in order to prevent the deadlock lever from malfunctioning due to vibration. The output torque cross due to the biasing force of the above is suppressed. Thereby, the driving force of the motor can be efficiently transmitted as the rotational power of the output shaft. Furthermore, the size of the deadlock lever can be reduced,
Since the fail-safe projection can be compactly arranged, the size of the entire device can be reduced.

According to the fifth aspect of the invention, by changing the rotation direction of the rotating body from the lock direction to the unlock direction, the fulcrum contacting the deadlock lever is moved to change the spring constant. An elastic body for power transmission is constituted so as to be able to perform. For example, the elastic body for power transmission is configured so that the spring constant at the time of unlock operation or at the time of deadlock release can be made larger than that at the time of lock operation or deadlock operation. Thereby, two spring constants can be set by one power transmission elastic body, so that the urging force of the power transmission elastic body and the urging force of the second elastic body can be easily set.

According to the sixth aspect of the present invention, the urging force of the power transmitting elastic body is made larger than the urging force of the first elastic body. The deadlock lever can be driven to the deadlock position only by the urging force of the elastic body. Also, by making the urging force of the power transmitting elastic body smaller than the urging force of the second elastic body during the deadlock operation and larger than the urging force of the second elastic body when the deadlock is released,
At the time of deadlock, the deadlock lever can be operated from the initial position to the deadlock position, and when the deadlock is released, the deadlock lever can be operated from the deadlock position to the initial position. Also, the second
By making the biasing force of the elastic body larger than the biasing force of the neutral point returning means, the deadlock lever can be held at the deadlock position even when the neutral point returning means generates the biasing force.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Structure of Embodiment] An embodiment of the present invention will be described based on an embodiment with reference to the drawings. here,
1 and 2 are views showing the overall configuration of the actuator.

A door lock actuator (hereinafter abbreviated as an actuator) of the present embodiment is a vehicle door lock for operating a door lock (not shown) for locking or unlocking a door provided in a vehicle such as an automobile. It is a driving device. Here, the door lock is provided by a latch that engages with a striker provided on the vehicle body side, a ratchet that operates the latch, an open lever that operates the ratchet, and a locking lever that locks or unlocks (none of them are shown). It is configured and is drivingly connected to an actuator via a rod (not shown).

The actuator comprises a motor 1 as a driving source, a rotating body 2 driven to rotate by the motor 1,
A coil-shaped return spring (SP) 3 for urging the output shaft 11 and the rotating body 2 of the motor 1 from the rotational position in the locking direction or the unlocking direction to the neutral point,
It comprises an output shaft 21 that transmits the rotational power (torque) of the motor 1 to the door lock, and an operating lever 4 that rotates integrally. Further, the actuator includes a deadlock (DL) lever 5 that moves in and out of a track on which the operating lever 4 rotates in the unlocking direction, and a return spring (SP) 6 that urges the DL lever 5 in a direction to return to the initial position.
Deadlock (DL)
Moderation spring (SP) 7 for holding the position, a power transmission member for operating the DL lever 5 from the initial position to the deadlock (DL) position, or from the DL position to the initial position, and these main parts. And an actuator case (hereinafter abbreviated as a case) 10 that accommodates the above.

As shown in FIGS. 1 and 2, the motor 1 is an electric motor housed in a case 10 and capable of rotating in a normal direction and a reverse direction. Control circuit). The energization control circuit of the present embodiment is configured to stop energization of the motor 1 after a certain time (for example, 0.2 to 0.5 seconds) has elapsed since the energization of the motor 1 was started. I have. A pinion gear 12 is fixed to the outer periphery of the output shaft 11 of the motor 1.

As shown in FIGS. 1 and 2, the pinion gear 12 is integrally formed of resin. The pinion gear 12 is formed in a substantially cylindrical shape having a convex portion at the tip, and is fixed to the outer periphery of the output shaft 11 of the motor 1 by press fitting or the like so as to rotate integrally with the output shaft 11 of the motor 1. I have. In the vicinity of the pinion gear 12, a reduction gear 20 having a large-diameter gear 20a that meshes with the pinion gear 12 fixed to the output shaft 11 of the motor 1 is provided. The reduction gear 20 is also formed with a small-diameter gear 20b that meshes with the rotating body 2.

As shown in FIGS. 1 and 2, the rotating body 2 is integrally formed of resin, and is rotatably fitted around a fixed shaft 13 fixed to the case 10. The rotating body 2 is moved from an initial stop position (neutral point) to a door locking position (locked state: represented as L state) or an anti-theft position (deadlocked state: represented as DL state) (right rotation direction in FIG. 1). To rotate. Further, it rotates in the direction from the initial stop position (neutral point) to the door unlock position (unlocked state: expressed as UL state) (left rotation direction in FIG. 1).

The rotating body 2 has an inner cylindrical portion fitted on the outer periphery of the fixed shaft 13, an outer cylindrical portion located on the outer peripheral side of the inner cylindrical portion, one end of the inner cylindrical portion and one end of the outer cylindrical portion. And an annular plate portion that connects the two. An outer peripheral gear (cylindrical gear) 14 that meshes with a small-diameter gear provided on the reduction gear 20 is formed on the outer wall surface of the outer cylindrical portion of the rotating body 2. The outer peripheral gear 14 is
A reduction gear device for reducing the rotation speed of the motor 1 is constituted by the pinion gear 12 and the reduction gear 20.

A protruding projection 15 is provided on the back surface (the surface facing the operating lever 4) of the annular plate portion of the rotating body 2, and the surface of the annular plate portion of the rotating body 2 (the top wall surface of the case 10) is provided. (A facing surface) is provided with a convex protrusion 16. And
The protrusion 16 constitutes a fitting portion (engaging portion) that engages with the operating lever 4 to drive the operating lever 4. Also, the protrusion 1
Around the periphery of the stopper 6, a stopper cushion 17 made of a cushion rubber for absorbing an impact upon collision with a stopper (described below) formed on the top wall of the case 10 is mounted.

The stopper cushion 17 includes the rotating body 2
Is rotated in the locking direction, a lock stopper (not shown) serving as a first regulating means provided on one end surface in the circumferential direction of an arc-shaped convex wall (not shown) formed on the top wall surface of the case 10. And the rotation of the rotating body 2 in the further locking direction is restricted.

When the rotating body 2 rotates in the unlocking direction, the stopper cushion 17 is an unlocking stopper (not shown) serving as a second regulating means provided on the other end surface of the convex wall in the circumferential direction. , And further rotation of the rotating body 2 in the unlocking direction is restricted. When the rotation of the output shaft 11 and the rotating body 2 of the motor 1 by the motor 1 (energization of the motor 1) is completed, the rotation between the outer wall surface of the inner cylindrical portion of the rotating body 2 and the inner wall surface of the outer cylindrical portion is completed. It is configured to be returned to the neutral point by the spring force of the return SP3 mounted on the vehicle.

The return SP3 corresponds to the neutral point returning means of the present invention. One end of the return SP3 is locked by a case projection 18 formed so as to project from the top wall surface of the case 10, and the other end is fixed to the top of the case 10. This is a neutral point returning elastic body locked to a case projection 19 formed to protrude from a wall surface.

The operating lever 4 locks the door and locks the door in accordance with the rotation of the rotating body 2, and unlocks the door by unlocking the door. Locking / unlocking operation means that is switched to a lock (UL) state, and is a door lock driving means that outputs the driving force of the motor 1 of the actuator to the door lock. The operating lever 4 is engaged with a protrusion 15 of the rotating body 2 and rotates in a locking direction or an unlocking direction with the rotation of the rotating body 2 (lever body). Output shaft 21 provided in a direction orthogonal to and through the body portion, and this output shaft 21
And an output lever (not shown) fixed to the outer periphery of the other end of the head.

As shown in FIG. 2, the output shaft 21 has one end rotatably supported in the case 10 and the other end protruding from the outer surface of the case 10. The output shaft 21 is insert-molded in the main body of the operation lever 4. The output lever transmits a driving force (torque) of the motor 1 to a door lock operating lever via a rod or a locking lever. The door lock is
Door inside lever in unlocked state (not shown)
Alternatively, when the user pulls (pulls up) an outside lever (not shown), the driving force is transmitted to the ratchet, and the door is opened.

Here, a part of the main body of the operating lever 4 is superimposed on the back surface of the rotating body 2 in FIGS. The rotation center of the operation lever 4 is provided so as to cover the outer periphery of the output shaft 21. The operating lever 4 has two engaging walls 22 and 23 projecting downward in FIG.
A concave cutout portion 24 formed between 2 and 23 is provided.

As shown in FIGS. 3 and 4, the notch 24 is provided with a projection 15 formed on the back surface of the rotating body 2.
When the operating member 4 is in the locked state or the unlocked state in the engaged portion, even if the rotating body 2 moves in the direction to return to the neutral point, the rotational position of the operating lever 4 does not change, that is, It has a size capable of releasing the driving connection state between the body 2 and the operation lever 4.

As shown in FIGS. 1, 3 and 4, the operating lever is provided on the side wall surface of one of the two engaging walls 22 and 23 (DL lever 5 side). When the lock lever 4 is in the unlocked state, the locked portion 25 locked to the DL lever 5 is integrally formed so as to be notched laterally. The side wall surface of the locked portion 25 is formed, for example, with a predetermined curvature around the support shaft 31 of the DL lever 5.

As shown in FIGS. 1 to 6, the DL lever 5 has a plate-shaped lever main body which is superimposed on the back surface of the rotating body 2, and the bottom of the case 10 A support shaft 31 rotatably supported on a wall surface
Is provided. The side wall surface of the lever main body of the DL lever 5 is formed, for example, with a predetermined curvature around the support shaft 31 of the DL lever 5 so as to face the side wall surface of the locked portion 25 of the operation lever 4. . From a part of the side wall surface of the lever body, a projection 34 having a predetermined shape is formed on the support shaft 31.
Project outwardly in the substantially radial direction.

In the lever body of the DL lever 5, the DL lever 5 and the operating lever 4 can rotate when locked (L) depending on the positional relationship with the locked portion 25 of the operating lever 4. At the time of lock (UL), the rotation of the DL lever 5 is prevented, and at the time of deadlock (DL), the locked portion 25 of the operation lever 4 is locked to prevent the operation lever 4 from rotating in the unlock direction. . And D
An engagement wall 35 with which the power transmission member is engaged is provided on the power transmission member side of the projection 33 integrally formed on the surface of the lever body of the L lever 5. Also, DL lever 5
The engaging wall 22 of the operating lever 4 is provided on the side wall surface of the lever body.
Is provided on the side wall surface (locking wall 26).

The return SP6 corresponds to the first elastic body of the present invention, and urges the DL lever 5 in the direction of returning to the initial position. One end is integrally formed with the other end surface of the DL lever 5. The other end is held by a locking wall 38 provided on the side wall surface of the case 10.

The moderation SP7 corresponds to the second elastic body of the present invention, and holds the rotational position of the DL lever 5 at a deadlock (DL) position. A portion (hook portion) for locking the portion 34 is bent in a substantially C shape. And moderation SP
7 is held at one end by the locking wall 39 of the case 10 so that the projection 34 of the DL lever 5 overlaps on the track rotating to the initial position side. 32 is the moderation SP
7 is a protrusion for adjusting the spring load.

As shown in FIGS. 1 to 6, the power transmission member operates the DL lever 5 from the initial position to the DL position when the deadlock is activated, and moves the DL lever 5 to the DL position when the deadlock is released. From the initial position to the DL position when deadlock is activated, and when the deadlock is released, the DL lever 5 is moved from the DL position to the initial position. Drive spring (SP) biasing to the side
9 and so on.

The spring guide 8 corresponds to the power transmission means of the present invention, and is integrally formed on the back surface of the rotating body 2, and the power transmitting projection for driving the DL lever 5 with the rotation of the rotating body 2. It is. The spring guide 8 assists the spring force of the drive SP9 by pushing the engagement wall 35 of the DL lever 5 when the operating load of the DL lever 5 is large due to the force for maintaining the moderation of the moderation SP7 and return SP6. It is configured.

The spring guide 8 has a holding groove 41 for holding the drive SP9, a central protrusion 42 protruding on the opposite side (DL lever 5 side) of the holding groove 41,
End projections 4 extended to both sides of the central projection 42
3, 44, etc. When the deadlock is activated, the end side projection 43 moves the DL lever 5 from the initial position to D
These are power transmission projections that are pressed toward the L position. The central projection 42 is provided with the DL lever 5 during the deadlock operation.
Are fail-safe protrusions (protrusion shapes) for pressing the DL lever 5 from the DL position to the initial position side when the deadlock is released when the slider does not move to the home position.

The drive SP 9 corresponds to the power transmission elastic body of the present invention, and is held in a state where the coil portion wound in a coil shape two or more times is fitted in the holding groove 41 of the spring guide 8. One end is engaged with the outer wall surface of the end projection 43, and the other end is engaged with the outer wall surface of the end projection 44.

The distal end of one end of the drive SP9 projects beyond the end-side projection 43, and is a hook portion wound in a hook shape or a coil portion wound in a coil shape two or more times. ing. The hook at one end of the drive SP9 exerts a spring force on the DL lever 5 when the hook comes into contact with the engagement wall 35 of the DL lever 5.

The drive SP9 changes the rotating direction of the rotating body 2 from the locked direction to the unlocked direction,
By moving the fulcrum contacting the DL lever 5, the spring constant at the time of unlocking operation or at the time of deadlock release is larger than at the time of locking operation or at the time of deadlock operation. That is, the drive SP9 has a small spring constant from the unlocked state to the lock operation or the deadlock operation, and has a large spring constant from the locked state to the unlock operation or the deadlock release.

Here, in this embodiment, the urging force (spring force) of the return SP3 in the state of being compressed and deformed is smaller than the force (spring force) for keeping the moderation between the moderation SP7 and the return SP6, and the motor 1 The rotation of the DL lever 5 and the moderation SP7 cannot be reversed unless the rotation output is applied. Further, the spring force of the moderation SP7 is larger than the spring force of the return SP3 during the DL operation or the lock operation. Further, the biasing force (spring force) for operating the DL lever 5 by the drive SP9 is larger than the spring force of the return SP6 and smaller than the spring force of the moderation SP7 during the DL operation, and is modest when the DL is released. It is larger than the spring force of SP7. That is, the spring force at the time of releasing the DL is: spring force of drive SP9> spring force of moderation SP7> spring force of return SP3.

[Operation of Embodiment] Next, the operation of the actuator of this embodiment will be briefly described with reference to FIGS. Here, FIGS. 3 to 13 are explanatory diagrams of the operation of the main parts of the actuator.

B) Locking operation from unlocked state At the neutral point of the operating lever 4 in the unlocked (UL) state (see FIG. 5A), the rotating body 2 is rotated in the locked (L) direction. When the motor 1 is energized, the torque of the motor 1 is transmitted to the rotating body 2 via the pinion gear 12, and the torque shown in FIG.
As shown in (e), the rotating body 2 rotates around the fixed shaft 13 in the L (right rotation in the drawing) direction while bending the return SP3.

At this time, the projection 15 of the rotating body 2 pushes the inner surface of the engagement wall 23 of the operating lever 4 to push the operating lever 4
Is turned in the L (left-hand rotation in the figure) direction about the output shaft 21, and the operating lever 4 enters a lock (L) state for locking the door (see FIG. 5E). Then, the stopper cushion 17 collides with the lock stopper of the case 10 and the rotation of the rotating body 2 in the L direction is stopped.

At this time, the hook portion at one end of the drive SP9 is in contact with the engaging wall 35 of the DL lever 5,
As the rotating body 2 rotates in the L direction, the abutting wall 36 of the DL lever 5 abuts on the locking wall 26 of the engaging wall 22 of the operating lever 4, thereby preventing the DL lever 5 from rotating leftward in the figure. Is done. For this reason, the hook at one end of the drive SP9 is
As shown in FIGS. 5B to 5E, the vehicle gets over the engagement wall 35 of the DL lever 5.

Thereafter, when the energization of the motor 1 is stopped, the rotating body 2 returns to the neutral point in the locked state due to the urging force (spring force) of the return SP3. Therefore, the operating lever 4 does not rotate, and the L state of the operating lever 4 is maintained.

B) At the time of deadlock operation from the locked state When the operating lever 4 is at the neutral point in the L state (see FIG. 7A),
When the motor 1 is energized so that the rotating body 2 rotates in the L direction, the torque of the motor 1 is transmitted to the rotating body 2 via the pinion gear 12 in the same manner as in the lock operation, and FIG.
8 (a) to 8 (d), while rotating the return SP3 in the same L direction as in FIG. 5 (b) while bending the return SP3, the protrusion 15 of the rotating body 2 is notched. Since the operation lever 4 does not rotate since it passes through the inside of the portion 24, the UL state of the operation lever 4 is maintained.

However, when the lever body of the DL lever 5 is DL
The locked portion 2 of the operating lever 4 is positioned on the track rotating toward the position side.
5 (a) to 3 (d) and FIG.
-(C) and FIGS. 7 (a)-(e) and FIG. 8 (a)-
As shown in (d), the hook wall at one end of the drive SP 9 and the end projection 43 of the spring guide 8 press the engagement wall 35, and the DL lever 5 rotates counterclockwise about the support shaft 31. In the direction of the arrow and the protrusion 34 of the DL lever 5
Collides with the locking wall 26 of the operating lever 4 and stops (FIG. 4).
(C) and FIG. 8 (b)).

In this state, the output shaft 21 of the operating lever 4 is
FIG. 8
As shown in (e), the rotation of the output shaft 21 of the operating lever 4 in the unlocking direction is stopped by the presence of the distal end of the DL lever 5 on the track on which the operating lever 4 rotates in the unlocking direction. As a result, the L state of the operating lever 4 that can prevent unlocking of the door by manual operation can be maintained.
This state is called a deadlock (DL) state.

Further, the rotating body 2 rotates in the L direction,
As shown in FIGS. 8C to 8D, the drive SP9
However, it turns over the engagement wall 35 while bending the return SP6. Then, the stopper cushion 17 collides with the lock stopper of the case 10 and the rotation of the rotating body 2 in the L direction is stopped.

Thereafter, when the energization of the motor 1 is stopped, D
The L lever 5 rotates rightward in the figure by the spring force of the return SP6, but the hook of the moderation SP7 locks the projection 34 of the DL lever 5 to hold the DL lever 5 in the DL position (FIG. 8 ( d)).

On the other hand, the motor 1 and the rotating body 2 are slightly returned to the neutral point side by the spring force of the return SP3, but one end of the drive SP9 is connected to the DL lever 5 as shown in FIG. It stops on the side wall surface of the joint wall 35. That is, since one end of the drive SP9 is locked to the side wall surface of the engagement wall 35 of the DL lever 5, the motor 1 and the rotating body 2 cannot return to the neutral point and maintain the DL state (FIG. 8). (E)).

C) At the time of deadlock release To release the DL state shown in FIGS. 6A and 9A, the motor 1 is rotated so that the rotating body 2 rotates in the UL direction.
Is turned on. Then, FIGS. 6A and 6B and FIG.
As shown in (a) and (b), the projection 34 of the DL lever 5 overcomes the force (spring force) that deflects the moderation SP7 to maintain the moderation of the DL lever 5, and the projection 34 is adjusted to the moderation SP.
Get over the hook part of 7.

FIGS. 6C to 6D and FIG.
As shown in (c) to (d), the hook at one end of the drive SP9 climbs over the engagement wall 35 of the DL lever 5, and
Further, one end of the drive SP9 pushes the side wall surface of the engagement wall 35 of the DL lever 5. Then, the engagement wall 35 is disengaged from the track on which the operation lever 4 rotates in the unlock direction.

At this time, the projection 15 of the rotating body 2 pushes the inner surface of the engagement wall 22 of the operating lever 4 to rotate the operating lever 4 in the UL direction about the output shaft 21, and the operating lever 4 (FIG. 6D and FIG. 9D). Then, the stopper cushion 17 collides with the unlock stopper of the case 10 and the rotation of the rotating body 2 in the UL direction stops.

Thereafter, when the energization of the motor 1 is stopped, FIG.
As shown in (e), the rotating body 2 returns to the neutral point in the unlocked state due to the spring force of the return SP3, but the projection 15 passes through the notch 24 as in the lock operation. The operating lever 4 does not rotate,
The L state is maintained.

(D) When deadlock is released (fail safe) Here, when DL operation is performed from the neutral point in the L state, FIG.
As shown in (a)-(d) and FIGS. 11 (a)-(d), the DL (FAIL) state in which the hook at one end of the drive SP9 has not passed over the engagement wall 35 of the DL lever 5 is shown. In this case, as shown in FIGS.
The central projection 42 of the spring guide 8 pushes the side wall surface of the engagement wall 35, and the central projection 42 gets over the engagement wall 37.

As a result, the projection 34 of the DL lever 5 deflects the moderation SP7 to overcome the force of maintaining the moderation of the DL lever 5, and the projection 34 gets over the hook of the moderation SP7, as shown in FIG. As described above, the DL lever 5 is returned to the initial position by the spring force of the return SP6,
The engaging wall 35 of the DL lever 5 comes off the track on which the operating lever 4 rotates in the unlock direction.

Thereafter, as shown in FIGS. 13A and 13B, the projection 15 of the rotating body 2 pushes the inner surface of the engaging wall 22 of the operating lever 4 to move the operating lever 4 to the output shaft 21. , The operating lever 4 is in the UL state.

[Effects of Embodiment] As described above, in the actuator of this embodiment, in addition to the drive SP9 as a power transmission member for driving the DL lever 5 to the DL position side at the time of deadlock operation, the return is performed. SP6 and moderation S
When the operating load of the DL lever 5 due to the spring force of P7 is large and the DL lever 5 cannot be pressed only by the drive SP9 (the drive SP9 is elastically deformed), the drive SP
By providing the spring guide 8 for assisting the spring force of the drive 9, the spring force of the drive SP9 can be reduced. Therefore, the sliding friction resistance generated by the spring force of the drive SP9 can be suppressed, and the output torque loss can be reduced. Thus, the driving force of the motor 1 can be efficiently transmitted as the rotational power of the output shaft 21.

Further, in the actuator of the present embodiment, as described above, the spring force of the drive SP9 can be reduced, so that the size of the drive SP9 can be reduced and the size of the actuator can be reduced.
Further, the operating load of the DL lever 5 due to the spring force of the return SP6 and the moderation SP7 is large, and the drive S
When the DL lever 5 cannot be pushed to the DL position by the spring force of only P9, that is, when the drive SP9 is only elastically deformed and the DL lever 5 cannot be pushed to the DL position,
Since the DL lever 5 can be driven by the end-side projection 43 of the spring guide 8, the spring force of the drive SP9 and the moderation SP7 can be easily set.

Even when the hook portion at one end of the drive SP9 does not climb over the engagement wall 35 of the DL lever 5 during the deadlock operation, the drive SP9 is integrally formed on the back surface of the rotating body 2 (in this example, integrally formed of resin). By using the provided central projection 42 as a fail-safe projection for releasing the deadlock by driving the DL lever 5 to the initial position side when the deadlock is released, the DL lever (10
5), the weight of the DL lever 5 can be reduced, and the DL lever 5 can be made lighter than the prior art (see FIGS. 14 to 16) in which a fail-safe projection (133) is provided.
Can be simplified. Accordingly, in order to prevent the DL lever 5 from malfunctioning due to vibration, it is not necessary to increase the spring force of the return SP6 for urging the DL lever 5 to the initial position. Can be reduced.
Thus, the driving force of the motor 1 can be efficiently transmitted as the rotational power of the output shaft 21.

By changing the rotation direction of the rotating body 2 from the locking direction to the unlocking direction, the fulcrum contacting the DL lever 5 is moved, so that the unlocking operation or the deadlock operation is performed more than the locking operation or the deadlock operation. The drive SP9 is configured so that the spring constant at the time of unlocking becomes larger. As a result, two spring constants can be set by one drive SP9.
It is possible to easily set the spring force of P9 and moderation SP7.

By making the spring force of drive SP9 greater than the spring force of return SP6, DL
When the operating load of the lever 5 is small, the DL lever 5 can be driven to the DL position only by the spring force of the drive SP9. In addition, the spring force of moderation SP7,
By making the spring force larger than the return SP3, even if the return SP3 generates the spring force,
The DL lever 5 can be held at the DL position.

[Modification] In this embodiment, the door lock driving device of the present invention is applied to an actuator for driving a door lock of each door mounted on a vehicle such as an automobile. May be applied to a door lock driving device (actuator) that drives door locks of doors and back doors mounted on a small vehicle such as a passenger car or a commercial vehicle, or a large vehicle such as a railroad vehicle, a bus or a truck.

Further, the door lock drive device of the present invention may be applied to a trunk lid drive device for locking or unlocking a trunk lid of a vehicle such as an automobile. Further, the door lock drive device of the present invention may be applied to a door lock drive device (actuator) that drives a door lock of a door arranged in a building such as a house or a store, in addition to a vehicle.

In this embodiment, the return SP6 is employed as a first elastic body for urging the DL lever 5 in the direction for holding the DL lever 5 at the initial position, and urging the DL lever 5 in the direction for holding the DL lever 5 in the DL position. Although the moderation SP7 is employed as the second elastic body, one moderation spring may have both functions of the first elastic body and the second elastic body.

[Brief description of the drawings]

FIG. 1 is a plan view showing an entire configuration of an actuator (Example).

FIG. 2 is a sectional view taken along line AA of FIG. 1 (Example).

FIGS. 3A to 3D are plan views showing the operation sequence of a DL lever (Example).

FIGS. 4A to 4C are plan views showing the operation order of the DL lever (Example).

FIGS. 5A to 5E are plan views showing a lock operation of the actuator (Example).

FIGS. 6A to 6D are plan views showing when the deadlock of the actuator is released (Example).

FIGS. 7A to 7E are plan views showing a deadlock operation of the actuator (Example).

FIGS. 8A to 8E are plan views showing a deadlock operation of the actuator (Example).

FIGS. 9A to 9E are plan views showing when the deadlock of the actuator is released (Example).

FIGS. 10A to 10D are plan views showing a deadlock operation of the actuator (Example).

FIGS. 11A to 11D are plan views showing a deadlock operation of the actuator (Example).

FIGS. 12A to 12D are plan views showing when the deadlock of the actuator is released (Example).

13 (a) and 13 (b) are plan views showing when the deadlock of the actuator is released (Example).

FIG. 14 is a plan view showing the overall configuration of an actuator (prior art).

FIG. 15 is a sectional view taken along line BB of FIG. 14 (prior art).

FIG. 16 is a perspective view showing a main configuration of an actuator (prior art).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor (drive source) 2 Rotating body 3 Return spring (neutral point return means) 4 Operating lever 5 DL lever 6 Return spring (1st elastic body) 7 Moderation spring (2nd elastic body) 8 Spring guide (power transmission means) Reference Signs List 9 drive spring (power transmission elastic body) 21 output shaft 35 engagement wall 42 central projection (fail-safe projection) 43 end projection (power transmission projection)

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tsukasa Sekino 136 Washizu, Kosai-shi, Shizuoka Prefecture F-term in the Hamana Kodenso Co., Ltd. 2E250 AA21 HH01 JJ05 JJ46 KK02 LL01 NN04 QQ01 QQ03 RR13 RR34 RR57

Claims (6)

[Claims] 1. A door lock driving device for driving a door lock for locking or unlocking a door, comprising: (a) a motor capable of rotating in forward and reverse directions; A rotating body that rotates from the point to the unlocking direction or from the neutral point to the locking direction; and (c) neutral point return means that urges the rotating body from the rotating position in the locking direction or the unlocking direction to the neutral point. (D) being drivingly connected to the rotating body, rotating in a locking direction when the rotating body rotates in a locking direction, and rotating in a direction for locking the door lock, and unlocking the door lock when the rotating body rotates in an unlocking direction. An output shaft that rotates in a direction to perform a locking operation, and a driving connection state with the rotating body is released when the rotating body returns to a neutral point from a rotating position in a locking direction or an unlocking direction. (E) a deadlock position in which, when deadlock is activated, the operation lever is on a track that rotates in the unlocking direction and can prevent unlocking of the door lock by manual operation; A deadlock lever that rotates between an initial position where the operating lever deviates from a trajectory where the operating lever unlocks when the deadlock is released; and (f) a direction in which the deadlock lever is held in the initial position. (G) a second elastic body that urges the deadlock lever in a direction to hold the deadlock lever at the deadlock position; and (h) the deadlock lever is used when the deadlock is activated. A power transmission bullet that urges the deadlock lever to the initial position side when the deadlock is released while urging the deadlock position side. And body, when a large operation load of the dead locking lever by the urging force of (i) the first elastic body and the second elastic member,
And a power transmitting means for operating the deadlock lever. 2. The door lock driving device according to claim 1, wherein the power transmission means includes a power transmission projection for driving the deadlock lever to the deadlock position side or the initial position side. A door lock driving device comprising: 3. The door lock driving device according to claim 1, wherein the power transmission means is provided with a dead force even when the power transmission elastic body does not move to a fixed position during a deadlock operation. A door lock drive device comprising a fail-safe projection capable of driving the deadlock lever to the initial position side when unlocking. 4. The door lock driving device according to claim 3, wherein the fail-safe projection is provided integrally with the rotating body. 5. The door lock drive device according to claim 1, wherein the power transmission elastic body is configured such that a rotation direction of the rotating body changes from a lock direction to an unlock direction. A door lock driving device, wherein a spring constant can be changed by moving a fulcrum contacting the deadlock lever. 6. The door lock driving device according to claim 5, wherein a biasing force of the power transmitting elastic body is larger than a biasing force of the first elastic body, and the second elastic body is in a deadlock operation. It is smaller than the urging force of the body, and is larger than the urging force of the second elastic body when the deadlock is released. The urging force of the second elastic body is larger than the urging force of the neutral point returning means. And door lock drive.