JP2579819B2 - Mirror stay drive control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention drives a support stay for supporting an outside mirror provided on a side opposite to a driver's seat for a large vehicle so as to be located at a use position and a storage position. The present invention relates to a mirror stay drive control device. In particular, the present invention relates to a motor control mechanism of a mirror stay drive control device.

〔Overview〕

The present invention relates to a mirror stay drive control device that drives and controls a mirror stay so as to be located at a use position or a storage position. In the mirror stay drive control device, the mirror stay drive is detected to detect that the mirror support stay has reached the use position or the storage position. When the unit reaches the use position or the storage position, a large load is applied to the motor, and when the current of the motor exceeds a predetermined value, it is detected and the power supply to the motor is stopped. This is to simplify the adjustment of the stop setting of the storage position.

[Conventional technology]

For large vehicles, a mirror stay with a left outside mirror mounted on a support stay pivoted to the vehicle is used in order to improve the visibility on the opposite side of the driver's seat and prevent obstacles when stopping. I have. When using this mirror stay, such as when driving, drive the mirror support stay to the left side of the vehicle and rotate it to a position that is more than the width of the vehicle,
When the vehicle is stopped on the left side of the road or the like, the support stay is rotated and stored at the front portion of the vehicle so as not to obstruct the passage of the left side of the vehicle or the approach of the width.

In order to drive the mirror stay to the use position and the storage position, the support stay is swung by a stay drive unit. That is, when the operation switch provided in the driver's seat is set to use or retract, power is supplied to the forward / reverse rotatable motor of the stay driving unit. The rotational force of the motor is converted by a stay driving unit into the movement of a swing arm that swings the support stay, and the swing arm swings the support stay so as to be positioned at the use position and the storage position. Whether or not the user has reached the use position or the storage position is detected by a position sensor, and the power supply to the motor is controlled to be stopped.

At this time, as a technique for detecting whether the support stay has come to the use position or the storage position, for example, two micro-pins are attached to the pivot of the support shaft that is pivotally attached to the vehicle body or the link shaft that swings the swing arm. A switch and a cylindrical cam provided with a cam ridge that presses each of the micro switches at a predetermined position of a use position or a storage position are provided, and the micro switch is operated according to the rotation of the link shaft to supply a current to the motor. The supply was stopped (Japanese Utility Model Application Laid-Open No. 63-196748).

[Problems to be solved by the invention]

However, when the use position and the storage position of the support stay are set by such a combination of the cylindrical cam and the micro switch, there is a problem that the position setting work is difficult. In other words, accurately setting the micro switch and the cylindrical cam to the use position or the retracted position by the pivot of the support stay and the rotation axis of the link shaft of the swing arm requires the rotation angle of the support stay and the swing arm. Was small and required difficult and subtle adjustments. In addition, this fine adjustment has to be performed manually, and there is a problem that mass productivity is hindered.

Also, there is a proposal to provide a forward / reverse rotation motor on the swing arm of the mirror stay (Japanese Utility Model Laid-Open Publication No. 61-186463). In this case, however, a motor is provided on the swing arm of the mirror stay itself, so that a vehicle is not provided. In order to avoid problems such as vibration of the motor, a small motor must be used, so that the driving power of the motor is not sufficient, and the supply and control of the driving power to the motor become complicated, and the weight of the motor is reduced. In order to support the support stay, it is necessary to increase the strength of the support stay, and there is a problem that the support stay becomes heavy.

The present invention solves the above-described problems, and detects that the support stay has come to the use position and the storage position from an increase in the load current of the motor in the support stay drive unit and stops the detection. It is an object of the present invention to provide a drive control device for a mirror stay that can easily and reliably set a use position or a storage position of a support stay.

[Means for solving the problem]

The present invention includes a support stay that supports an outside mirror and is pivotally attached to the vehicle body, and a stay drive unit that includes a forward / reverse rotation motor and swings the support stay around a pivot portion of the vehicle body as a fulcrum. In a mirror stay drive control device including a control circuit that detects that the support stay has reached a use position or a storage position and stops power supply to the motor, the stay drive unit rotates the support stay around a support axis. A rod arm that swings the rod arm by rotation, a gear that reduces and transmits the rotation of the motor to the shaft, a pin connected to one of the gears, When the pin that is inserted and moves in accordance with the rotation of the gear reaches the use position or the retracted position when the support stay reaches the use position or the storage position, the movement of the pin is restricted to A guide groove for applying a large load to the motor, the control circuit comprising: means for detecting a current of the motor; and means for stopping power supply to the motor when a detection value of the means exceeds a predetermined value. It is characterized by including.

[Action]

When the mirror stay is driven from the retracted state to the use position, the operation switch is turned on to use, the motor is rotated, and the support stay is pushed out of the vehicle by the swing arm of the drive unit. When the support stay reaches the use position, the rotation position of the pin connected to the gear that transmits the rotational force of the motor at a low speed to the arm that swings the support stay reaches the end of the guide groove, and the load current of the motor When a current equal to or more than a predetermined value is detected, power supply to the motor is stopped and the swing arm of the drive unit is stopped.

Similarly, when the mirror stay is stored in the storage position from the use state, the supporting stay is similarly pulled into the inside of the vehicle by the swing arm, and the increase in the load current of the motor is detected to stop the motor.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a view for explaining an operation mechanism of a driving device of a mirror stay according to an embodiment of the present invention, and FIG. 2 is a diagram showing a configuration of an electric control system of the driving device of this embodiment.

In FIG. 1, a mirror 1 is attached to an arm of a support stay 21. The support stay 21 is attached to a vehicle body 2 at upper and lower pivot portions 21A so as to be rotatable about a substantially vertical axis. . A housing 3 is provided on a roof portion of the vehicle body 2. The housing 3 is provided with a drive unit for swinging the support stay 21 to a use position and a storage position.

 The structure of this drive unit will be described.

A first shaft 22, a second shaft 23, and a third shaft 24 are attached to a ceiling plate 30 of the housing 3 so as to be rotatable around an axis. A pinion gear 22A and a pinion gear 22B that mesh with the worm gear 4A fixed to the rotation shaft of the forward / reverse rotation motor 4 are fixed to the first shaft 22. A gear 25 that meshes with the pinion gear 22B is fixed to the second shaft 23. A lever 24A and a rod arm 27 are fixed to the third shaft 24. Lever 2
A link arm 26 is provided which is connected to 4A by a pin 26B and is connected to the gear 25 by a pin 26A. The ceiling plate 30 of the housing 3 is provided with an annular guide groove 30A for a half circumference stroke along the circumferential direction of the gear 25, and a pin 26A for inserting the link arm 26 and the gear 25 is inserted. . A rod arm 27 fixed to the third shaft 24 is connected to a rod arm 29 by a joint 28, and the rod arm 29 is connected to an upper arm of the support stay 21. The rod arms 27 and 29 constitute a swing arm that swings the support stay 21.

As shown in FIG. 2, the electric control system of the apparatus of this embodiment includes a motor 4 that rotates forward and backward, and a use side contact provided at a driver's seat so as to position the mirror stay at either the use position or the storage position. , An operation switch 6 for selecting one of the storage-side contacts, a power supply 7 connected to the operation switch 6, and the motor 4 and the operation switch 6 for detecting current consumption of the motor 4. And a control circuit 5 for performing a power supply stop control to the motor 4.

The control circuit 5 includes a current detecting means 51 for detecting a current consumption of the motor 4, and a comparing means 52 for detecting whether or not the current consumption of the motor 4 detected by the current detecting means 51 exceeds a predetermined value. When the comparing means 52 sets the predetermined current value, that is, when the support stay 21 is located at the predetermined use position or the storage position and the current consumption increases and the load becomes high, the power supply to the motor 4 is cut off. And stopping means 53 for performing the operation.

 Next, the operation of the present embodiment will be described.

Here, an example of the operation when the mirror stay is driven from the use position to the storage position will be described.

When the driver parks the vehicle by moving the vehicle body to the left side of the road and moves the outside mirror 1 to the storage position,
The operation switch 6 is operated to the storage side. The operation switch 6 turns on the retracted contact, and the current from the power supply 7
And the motor 4 starts rotating toward the retracted side of the support stay.

The torque of the motor 4 is transmitted to the gear 25 via the pinion gears 22A and 22B. When the gear 25 rotates in the direction of the arrow, the pin 26A moves along the guide groove 30A, and rotates the lever 24A around the third shaft 2 through the link arm 26 in the direction of the arrow. And this third shaft
When the rod arm 27 connected to the rod 24 rotates in the direction of the arrow, the rod arm 29 connected to the rod arm 27 rotates the support stay 21 in the direction of the arrow.

Here, when the support stay 21 reaches the storage position, the gear
The pin 26A inserted into the pin 25 is located on the opposite side of the guide groove 30A, the gear 25 cannot rotate any more, and the motor 4 also stops. At this time, the load current flowing through the motor 4 is the third current.
As shown in the diagram of the relationship between the motor consumption current and the motor speed with respect to the rotation torque of the motor shown in the drawing, the motor consumption current increases and enters a high load current region shown by oblique lines.

This motor consumption current is calculated by the current detection means 51 of the control circuit 5.
, And it is determined by the comparing means 52 whether or not it enters the high load current region indicated by the oblique lines. When entering the high load current region,
In response to the output of the comparing means 52, the stopping means 53 stops the power supply from the power supply 7.

FIG. 4 shows a control flowchart for driving the support stay 21 to the storage position.

When the support stay 21 is driven to the use position, the same can be achieved by rotating the motor 4 in the reverse direction.

In the embodiment of the present invention, when the gear 25 rotates halfway in the direction of the storage position or the use position with the rotation of the motor 4, the pin 26A is regulated by the guide groove 30A, so that the pin 26A cannot rotate any more. Therefore, at that position, the motor 4
Stops, the consumption current flowing to the motor 4 increases rapidly, and it can be detected that the motor 4 has reached the storage position. In the present embodiment, the transmission mechanism that transmits the rotational driving force of the motor 4 is mechanically configured so that it cannot rotate any more when it reaches the storage position or the use position. The fact that the current region has been reached can be clearly detected at the stop position. For this reason, when the current consumption of the motor is detected, the current consumption does not increase until the outside mirror 1 hits the window of the driver's seat by rotating the support stay 21, and the support stay 21 is connected to the vehicle body 2. It can be stopped before hitting the driver's seat.

In the present embodiment, the rotation of the pin 26A is restricted by the guide groove 30A in order to stop the rotation of the motor. However, another restriction mechanism is also possible to surely stop the rotation of the motor 4. It is. For example, the pin 26B at the tip of the lever 24A may have the same configuration, or a stopper may be provided at another position of the gear 25 at a position corresponding to the use position and the storage position.

〔The invention's effect〕

Since the present invention is configured as described above, the rotation position of the mirror stay can be electrically detected, so that fine manual adjustment is not required, and the driving stop of the mirror stay to the use position or the storage position can be accurately performed. It is possible to control. The brake mechanism that applies a large load to the motor when the mirror stay comes to the use position or the storage position has a built-in forward / reverse rotation motor, and a guide groove in a drive unit that drives a rod arm coupled to the mirror stay. Since it is constituted by a pin inserted into the guide groove and connected to a gear for transmitting the rotation of the forward / reverse rotation motor, there is an effect that the structure is simple. Further, since the motor is not directly attached to the rod arm of the mirror stay, it is not necessary to increase the strength of the mirror stay, and there is an effect that a mirror stay having a sufficient driving force can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a driving mechanism of a mirror stay according to one embodiment of the present invention. FIG. 2 is a diagram showing a configuration of an electric control system for drive control of the mirror stay according to the embodiment. FIG. 3 is a diagram showing a relationship between motor power consumption and motor speed with respect to motor torque. FIG. 4 is an example of a control flowchart of the embodiment. DESCRIPTION OF SYMBOLS 1 ... Outside mirror, 2 ... Body, 3 ... Case, 4 ... Motor, 5 ... Control circuit, 6 ... Operation switch, 7 ... Power supply, 21
... Support stays, 22,23,24 ... Shaft, 22A, 22B ... Pinion gear, 24A ... Lever, 25 ... Gear, 26 ... Link arm, 26A, 26B ... Pin, 27,29 ... Rod arm, 28 ... Joint.

Claims (1)

(57) [Claims] 1. A support stay (21) which supports an outside mirror (1) and is pivotally mounted on a vehicle body, and includes a forward / reverse rotation motor (4), and the support stay is mounted on a pivot portion (21A) of the vehicle body. And a stay drive unit for swinging as a fulcrum, and a mirror stay drive control comprising a control circuit (5) for detecting that the support stay has reached a use position or a storage position and stopping power supply to the motor. In the apparatus, the stay driving unit includes: a rod arm (27, 29) for swinging the support stay around a support axis; a shaft (24) for swinging the rod arm by rotation; A gear (22B, 25) for transmitting rotation at a reduced speed; a pin (26A) connected to one of the gears; A guide groove (30A) for restricting the movement of the pin when the vehicle reaches the use position or the storage position to apply a large load to the motor, wherein the control circuit detects a current of the motor; ,
Means for stopping the power supply to the motor when the detected value of the means exceeds a predetermined value.