JP2000104431A - Drive control device for door closer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of noise at the time of operating a closer mechanism by controlling a driving mechanism with a control means so that the driving speed of the driving mechanism coincide with the preset target speed at the time of resetting a closer mechanism. SOLUTION: When a recognition that a closer mechanism is not positioned at the original position and that a door of a vehicle is perfectly closed is performed, a timer circuit 56 sends the driving signal to a reverse circuit 52. During the reset operation waiting time by the timer circuit 56, a power source monitor circuit 57 reads the voltage of a power source 6, and an initial pulse duration corresponding to the target rotating speed of a motor 41 and the read voltage is set on the basis of a map stored in a memory inside of a CPU 51. The target rotating speed of the motor 41 is set at a speed lower than the speed of the motor 41 during the closing operation, and the initial pulse duration is set at a pulse duration capable of obtaining the target rotating speed of the motor 41 with the voltage read during the reset operation waiting time. With this structure, the driving noise at the time of reset operation is restricted to a nearly constant little noise in comparison with the driving noise at the time of closing operation, and the generation of noise at the time of operating a closer mechanism can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for a door closer device, and more particularly, to closing a close mechanism from an original position to a fully closed position to change a vehicle door from a half-closed state to a completely closed state. The present invention relates to a drive control device of a door closer device having control means for driving and controlling a drive mechanism so as to return a closer mechanism to an original position after being operated.

[0002]

2. Description of the Related Art Conventionally, a drive control device for a door closer of this type relates to Japanese Patent Application Laid-Open No. 9-291737. This is because the closer mechanism closes the door from the half-closed state to the fully closed state, a drive mechanism that operates the closer mechanism, and the closer mechanism closes the drive mechanism from the original position to the fully closed position to close the vehicle door halfway. Control means for controlling the drive so as to return from the completely closed position to the original position after the state is completely closed.
The driving mechanism in this conventional apparatus is driven by a power supply voltage so that the closer mechanism performs a closing operation and a returning operation based on a signal from a control unit.

[0003]

However, in the above-described conventional apparatus, the driving mechanism is driven at substantially the same driving speed regardless of the closing operation and the returning operation of the closer mechanism, but the returning operation of the closer mechanism is performed. Since the driving is performed after the vehicle door is completely closed, the driving sound of the driving mechanism at this time may be felt as unnecessary discomfort for the user. Further, the driving sound of the driving mechanism is easy to change its timbre due to the sliding resistance of the closer mechanism and the levers constituting the driving mechanism and a change in the load of the return spring. The change in the timbre of the driving sound may cause the user to feel more uncomfortable.

[0004] Therefore, an object of the present invention is to reduce unpleasant noise during operation of the closer mechanism.

[0005]

In order to solve the above-mentioned technical problems, the technical means adopted in the present invention is to control the control means by setting the driving speed of the driving mechanism at the time of return operation of the closer mechanism to a predetermined target speed. That is, it is configured to control the speed.

According to this technical means, the driving sound at the time of the returning operation of the closer mechanism can be made a substantially constant and small driving sound as compared with the driving sound at the time of the closing operation. Therefore, unpleasant sound during operation of the closer mechanism can be reduced.

[0007] More preferably, a PWM control circuit for controlling the drive speed to a target speed by performing PWM control on the control means so as to repeatedly drive the drive mechanism on and off at a high speed during the return operation of the closer mechanism. It is good to comprise.

More preferably, the target speed is set to a speed lower than the drive speed of the drive mechanism during the closing operation of the closer mechanism.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS.
The door closer device 1 is assembled to a door lock device 2 having a latch mechanism having a pawl and a latch for holding a vehicle door in a half-closed state (a so-called half-door state) and a completely closed state (a so-called door-closed state). That
The closer mechanism 3, the drive mechanism 4, and the drive controller 5 (FIG. 3)
Shown). The closer mechanism 3 has a known configuration including an active lever, a passive lever, and the like, and is linked to the latch of the latch mechanism of the door lock device 2 by the passive lever. Drive mechanism 4
Has a well-known configuration including a motor 41 serving as a drive source, a reduction gear structure, an output lever, and the like. The output lever is linked to an active lever of the closer mechanism 3. The drive control device 5 includes a CPU 51, and includes a power source 6 such as a vehicle-mounted battery and a motor 41 of the drive mechanism 4.
And controls the drive of the motor 41 of the drive mechanism 4 based on various signals. In such a configuration, the drive mechanism 4 driven and controlled by the drive control device 5
By operating the motor 41, the active lever and the passive lever of the closer mechanism 3 are operated from the original position to the fully closed position (close operation), and the latch of the latch mechanism of the door lock device 2 is moved from the half latch position to the full latch position. Make it work. As a result, the vehicle door in the semi-closed state is completely closed. After the closing operation, the closer mechanism 3 is driven by the motor 41 of the drive mechanism 4 whose drive is controlled by the drive control device 5 in a direction opposite to that described above.
The active lever and the passive lever are moved from the fully closed position to the original position (return operation).

As shown in FIG. 3, a power supply 6 is connected to the CPU 51 of the drive control device 5.
2 and the motor 41 are connected via the reverse rotation circuit 53. A CPU 5 is provided between the reverse rotation circuit 53 and the motor 41.
1 is connected to a PWM (pulse width modulation) control circuit 54. The PWM control circuit 54 is a circuit for driving the motor 51 with a pulse waveform to drive the motor 51 so as to repeat on and off at a high speed. The PWM control circuit 54 changes the pulse width based on a signal from the CPU 51 to change the rotation speed of the motor 41. Is controlling. The CPU 51 is provided with a full latch switch (hereinafter, referred to as a full latch SW) 7, a half latch switch (hereinafter, referred to as a half latch SW) 8, a pole switch (hereinafter, a pole SW) via an input circuit 55.
9) are connected. The full latch SW7 is
The latch mechanism is provided in the latch mechanism of the door lock device 2 in association with the latch, and is of a limit type that turns from off to on when the latch rotates to a full latch position. The half latch SW8 is disposed in association with the latch mechanism of the door lock device 2, and is turned from on to off when the latch of the latch mechanism of the door lock device 2 rotates to the half latch position. belongs to. The pole SW9 is disposed in association with the pole of the latch mechanism of the door lock device 2,
The door lock device 2 is of a limit type that is turned on and off in accordance with a rotation operation so as to engage with a pawl portion of a pawl latch of a latch mechanism of the door lock device 2. The rotation angle sensor 10 is connected to the CPU 51. The rotation angle sensor 10 is provided in association with the reduction gear structure of the drive mechanism 4, and outputs a signal (rotation angle signal) that changes according to the rotation angle of the motor 41 of the drive mechanism 4 to the CPU 51. It is of the variable resistance volume type. Further, a timer circuit 56 and a power supply monitoring circuit 57 are connected to the CPU 51.

Next, a basic process of the drive control device 5 will be described with reference to FIGS. 4, 5 and 7. FIG.

First, in steps S1 to S10, the CPU 51 determines whether or not the vehicle door is in a half-closed state or a fully-closed state with the closing operation of the vehicle door by a full latch SW7.
The determination is made based on signals from the half latch SW8 and the pole SW9.

When the vehicle door is closed, the full latch SW7
Is turned on and the pole SW9 is switched from on to off (steps S4 and S5), the CPU 51 determines that the vehicle door is in the completely closed state, and ends the processing in step S5.

When the vehicle door is closed, the half latch SW
When the switch 8 is turned off and the pole SW 9 is switched from on to off (steps S9 and S10), the CPU 51 determines that the vehicle door is in the half-closed state, proceeds from step S10 to step S11, and proceeds to step S11. In step S12, a drive signal is issued to the normal rotation circuit 52 after a lapse of a predetermined time measured by the timer circuit 56, and the motor 41 of the drive mechanism 4 is rotated at the power supply voltage of the power supply 6, that is, at the maximum rotation speed in the normal rotation direction. Drive. Thereby, the closer mechanism 3 performs the above-described closing operation. The timer circuit 56
When the vehicle door is opened by operating the handle of the vehicle door or the like while the predetermined time is being measured (waiting for the closing operation), the half latch SW8 is turned on again (step S8). Is stopped, and the process returns from step S8 to step S1. If the vehicle door is completely closed while the timer circuit 56 is counting the predetermined time, the full latch SW7 is turned on and the pole SW9 is switched from on to off (steps S9 and S10). The measurement of the predetermined time by the circuit 56 is stopped, and the process ends in step S10.

At the time of the closing operation, when the full latch SW7 is turned on and the pole SW9 is switched from on to off (steps S16 and S17), the CPU 51 determines that the vehicle door is in a completely closed state, and proceeds to step S18. Then, a stop signal is issued to the normal rotation circuit 52 to stop driving the motor 41 of the drive mechanism 4 in the normal rotation direction. After this, CPU5
In step S1, the process proceeds from step S18 to step S19. In step S19, a drive signal is issued to the reverse rotation circuit 52 after a lapse of a predetermined time counted by the timer circuit 56, as will be described in detail later.
It is driven in the reverse direction at a predetermined target rotation speed by the M control circuit 54. Thereby, the closer mechanism 3 performs the above-described return operation. Then, the process ends in step S19. If the handle of the vehicle door or the like is operated during the closing operation to open the vehicle door, the half latch SW8 is turned on again (step S14).
In U51, in step S15, a stop signal is issued to the normal rotation circuit 52 to stop driving the motor 41 of the driving mechanism 4 in the normal rotation direction, and in step S20, the timer circuit 5
After a lapse of a predetermined period of time measured by 6, a drive signal is issued to the reverse rotation circuit 52 to drive the motor 41 of the drive mechanism 4 in the reverse rotation direction at the maximum speed. Thereby, the closer mechanism 3 performs the above-described return operation. Then, the process ends in step S20.

The process ends.

Next, the processing of the drive control device 5 in the return operation, which is a main part of the present invention, will be described with reference to FIGS.

First, in the CPU 51, step S191 is performed.
, The motor 4 detected by the rotation angle sensor 10
1 is read, and the current rotation speed of the motor 41 is calculated from the read rotation angle of the motor 41.

Thereafter, in step S192, the present position of the closer mechanism 3 is recognized based on the read rotation angle of the motor 41, and if it is determined that the closer mechanism 3 is not at the original position, the full latch is performed in step 193. S
From the state of W7, it is determined whether or not the vehicle door is completely closed.

When it is determined that the closer mechanism 3 is not at the original position and the vehicle door is in the completely closed state, the CPU 51 proceeds from step S193 to step S194, and in steps S194 and S197, the timer circuit 56 counts time. After a lapse of a predetermined time, a drive signal is issued to the reversing circuit 52. While the timer circuit 56 is counting the predetermined time (waiting for the return operation), in step S195, the power supply monitoring circuit 57 reads the power supply voltage of the power supply 6, and in step S196, the power supply voltage depends on the target rotation speed of the motor 41 and the read power supply voltage. The initial pulse width is set based on a map stored in a memory in the CPU 51. Note that the target rotation speed of the motor 41 is set to a rotation speed lower than the rotation speed of the motor 41 during the closing operation, and the initial pulse width is set at step S during standby for the return operation.
The power supply voltage read in 196 sets the pulse width at which the motor 41 theoretically reaches the target rotation speed.

When a drive signal is issued to the reversing circuit 52,
Step S19 is applied to the motor 41 by the PWM control circuit 54.
The motor 41 is driven in the reverse rotation direction by the signal of the pulse waveform having the initial pulse width set in 6.

Thereafter, the CPU 51 proceeds to step S19.
In step S198, when it is determined that the motor 41 has started moving from the rotation angle of the motor 41 detected by the rotation angle sensor 10, and when it is determined that the motor 41 has started moving, step S198 is performed.
From step S200. In step S200, the current rotation speed of the motor 41 calculated and the motor 4
If the current rotation speed is lower than the target rotation speed, the CPU 51 sends a signal to the PWM control circuit 54 to increase the pulse width to increase the rotation speed in step S201. If it is slow, in step S202, a signal for reducing the pulse width is issued to the PWM control circuit 54 to reduce the rotation speed, and the PWM control of the motor 41 is performed so that the rotation speed of the motor 41 approaches the target rotation speed. And drive. Until it is determined in step S198 that the motor 41 has started to move, in step S199, the pulse width is gradually increased from the initial pulse width to secure the initial rotation torque of the motor 41.

When it is determined that the closer mechanism 3 is not at the original position but the vehicle door is not completely closed, the CPU 51
In steps S193 to S203 and S204, a drive signal is issued to the reverse rotation circuit 53 to drive the motor 41 of the drive mechanism 4 in the reverse rotation direction at the maximum rotation speed, thereby immediately returning the closer mechanism 3 to the original position.

Steps S196, S199, S201,
The process returns to step 2191 from S202 and S204, and the above processing is repeated. If it is determined in step S192 that the closer mechanism 4 is at the original position from the rotation angle of the motor 41 detected by the rotation angle sensor 10, the CPU 51 Then, in step 205, a stop signal is issued to the reverse rotation circuit 53 to stop driving the motor 41 in the reverse rotation direction, and the process ends.

As described above, when the closer mechanism 3 performs the returning operation, the motor 41 of the drive mechanism 4 is operated by the closer mechanism 3.
Are driven at a lower rotation speed than the motor 41 of the drive mechanism 4 when the closing operation is performed. Therefore, the driving sound of the driving mechanism 4 at the time of the returning operation of the closer mechanism 3 is smaller than the driving sound at the time of the closing operation. Further, the motor 41 of the drive mechanism 4 at the time of the return operation is driven at a substantially constant rotational speed regardless of the power supply voltage of the power supply 6, the operation load of the closer mechanism 3, and the like. Therefore, the drive sound of the drive mechanism 4 at the time of the return operation of the closer mechanism 3 becomes substantially constant, and a change in timbre is suppressed.

[0026]

According to the present invention, since the drive speed of the drive mechanism is controlled so as to reach a preset target speed at the time of the return operation of the closer mechanism, the drive sound at the time of the return operation of the closer mechanism is reduced. The driving sound can be made substantially constant and small compared with the driving sound at the time of the closing operation, and the unpleasant sound at the time of operating the closer mechanism can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle equipped with a door closer device according to the present invention.

FIG. 2 is a perspective view of a door closer device according to the present invention.

FIG. 3 is a circuit diagram showing a drive control device of the door closer device according to the present invention.

FIG. 4 is a flowchart showing the operation of the control means of the drive control device of the door closer device according to the present invention.

FIG. 5 is a flowchart showing the operation of the control means of the drive control device of the door closer device according to the present invention.

FIG. 6 is a flowchart showing the operation of the control means of the drive control device of the door closer device according to the present invention.

FIG. 7 is a timing chart showing the operation of the control means of the drive control device of the door closer device according to the present invention.

[Explanation of symbols]

 Reference Signs List 3 Closer mechanism 4 Drive mechanism 5 Control means 54 PWM control circuit

Claims (3)

[Claims] 1. A closer mechanism for closing a vehicle door from a half-closed state to a completely closed state, a drive mechanism for operating the closer mechanism, and the closer mechanism closing the drive mechanism from an original position to a fully closed position. Control means for controlling the vehicle door to return from the fully closed position to the original position after the vehicle door has been changed from the semi-closed state to the fully closed state, the control means comprising: A drive control device for the door closer device, wherein the drive speed of the drive mechanism is controlled to be a target speed set in advance during the return operation. 2. The control means has a PWM control circuit that performs PWM control so as to repeatedly drive the drive mechanism on and off at a high speed during a return operation of the closer mechanism, and controls the drive speed to a target speed. A drive control device for a door closer device according to claim 1. 3. The drive control device for a door closer device according to claim 1, wherein the target speed is lower than a drive speed of the drive mechanism when the close mechanism is closed.