JP6701785B2 - Sunshade drive - Google Patents

Description

  The present invention relates to a sunshade drive device.

  Some vehicles are provided with a sunshade drive device that opens and closes a shade for blocking light from the rear glass or the like to the inside of the vehicle (see, for example, Patent Document 1). Such a sunshade drive device includes a motor for opening and closing the shade via the link mechanism. For example, when an operation switch provided in the driver's seat is pressed once, the motor is driven and the upper end of the shade is moved by the link mechanism. It is pulled up and the closing operation is performed.

JP, 2011-213332, A

  By the way, in such a sunshade drive device, when the amount of change in the current value of the motor exceeds a threshold value when a foreign object is caught or when the opening/closing end position (terminal position) is reached, it is determined that the motor is in a locked state. A control unit for stopping the motor by means of the motor is provided to prevent the motor from being energized for a long time. In the lock determination process for determining such a locked state, the amount of change exceeds the threshold value even when not in the locked state at the time of startup, and therefore the unlocked state is set for the mask time set in advance at the time of startup. It is necessary to perform a mask process for making a determination. This masking process takes into consideration that the load and current value applied to the motor change due to changes in the attitude of the link mechanism depending on the shade position (open/close end position or open/close intermediate position), and It is necessary to set the mask time to a length that does not make an erroneous determination that it is in the locked state regardless of the position (starting at any position). Specifically, for example, when the amount of change in the motor current value is large due to the influence of the attitude of the link mechanism near the opening/closing center position and it does not easily converge, the motor is started near the opening/closing center position (for example, at the opening/closing center position). It is necessary to set the mask time long enough so as not to make an erroneous determination that the lock state is set even in the case of reverse driving. The erroneous determination that the motor is in the locked state causes a problem that the motor does not start depending on the position of the shade at the time of starting. However, if the mask time is set to be long as described above, for example, when the motor is started from the opening/closing end position and the amount of change in the motor current value is small and converges in a short time, the lock state (Pinching) cannot be detected, and the motor may continue to be energized for a long time.

  The present invention has been made to solve the above problems, and an object thereof is to provide a sunshade drive device capable of highly accurately determining whether or not a locked state is present.

A sun shade driving device that solves the above problem is determined to be in a locked state when a motor for opening and closing a shade via a link mechanism and the amount of change in the current value of the motor exceed a preset threshold value. The lock determination process to perform, and a control unit that performs a mask process that determines a non-locked state regardless of the result of the lock determination process for a preset mask time when the motor is activated, and the control unit, In order to change the mask time in the mask processing according to the position of the shade, the control unit sets the mask time when the position of the shade is at the opening/closing end position as a first mask time, The mask time when the shade position is at the opening/closing intermediate position is set as a second mask time longer than the first mask time .

  According to this configuration, the control unit determines the lock state when the amount of change in the motor current value exceeds the preset threshold value, and the preset mask time when the motor starts. The mask process for determining the unlocked state is performed for the amount regardless of the result of the lock determination process. Then, since the mask time in the mask processing is changed by the control unit according to the position of the shade, the mask processing is performed with the mask time in consideration of a current value having a different waveform depending on the posture of the link mechanism with respect to the position of the shade. Therefore, it is possible to highly accurately determine whether or not the lock state is established.

  According to this configuration, the mask time when the shade position is at the opening/closing end position is the first mask time, and the mask time when the shade position is at the opening/closing intermediate position is longer than the first mask time. Since it is set as two mask times, it is possible to specifically determine with high accuracy whether or not the lock state is established.

In the sunshade drive device, it is preferable that, when the control unit determines that the lock state is set, the power supply to the motor is stopped.
According to this configuration, when the control unit determines that the motor is in the locked state, the power supply to the motor is stopped, so that it is possible to prevent the power supply from being continuously energized for a long time even in the locked state.

  In the sun shade drive device, when the operation switch is operated, the control unit drives the motor to move the position of the shade to one of the open/close end positions even when the operation switch is in a non-operation state. Preferably.

  According to this configuration, when the operation switch is operated, the control unit drives the motor so as to move the position of the shade to one of the open/close end positions even when the operation switch is in an unoperated state (having a so-called auto function. Therefore, it is possible to obtain a greater effect as compared with, for example, one in which the motor is driven only during continuous operation. In other words, if the motor is driven only during continuous operation, the operator may stop the operation immediately after seeing that the shade is not moving. If it is not possible, there is a high possibility that the auto function will continue to be energized for a long time, so that the effect of being able to determine the locked state with high accuracy becomes greater.

  With the sunshade drive device of the present invention, it is possible to determine with high accuracy whether or not the locked state.

(A) And (b) is a schematic block diagram of the rear sunshade apparatus in one embodiment. FIG. 6 is a characteristic diagram for explaining the operation of the sunshade drive device in one embodiment. FIG. 6 is a characteristic diagram for explaining the operation of the sunshade drive device in one embodiment.

Hereinafter, one embodiment of the rear sunshade device will be described with reference to FIGS.
As shown in FIGS. 1( a) and 1 (b ), the rear sunshade device is provided below the rear glass in the vehicle interior, and includes a link mechanism 1 and a shade S via the link mechanism 1. A motor 2 for opening/closing driving, and a control unit 3 capable of driving and controlling the motor 2 are provided. In the present embodiment, the motor 2 and the control unit 3 constitute a sunshade drive device.

  The link mechanism 1 includes a fixed frame 4 formed in a long shape along the vehicle width direction and fixed to a vehicle, and a pair of lower sides whose base ends are rotatably supported at both ends of the fixed frame 4. An arm 5, an upper arm 6 whose proximal end is rotatably connected to the tip of each lower arm 5, and a movable frame 7 whose both ends are rotatably connected to the tip of each upper arm 6. With. The upper end of the shade S is attached to the movable frame 7. Further, a motor 2 capable of rotationally driving the rotating shaft 2a is fixed to the central portion of the fixed frame 4 in the longitudinal direction (vehicle width direction).

  Further, the link mechanism 1 includes a rotating member 8 having protruding rotating portions 8a protruding in the radial direction of the rotating shaft 2a at intervals of 180 degrees and rotating integrally with the rotating shaft 2a; 8a, and a link rod 9 rotatably connected to the other end of the lower arm 5 and rotatably connected to an operation lever portion 5a protruding from the base end side of each lower arm 5.

  In the link mechanism 1, when the rotating shaft 2a (projecting rotating portion 9a) is rotationally driven, the link rod 9 moves substantially along the longitudinal direction thereof, and the operating lever portion 5a of the lower arm 5 is operated. The lower arm 5 rotates, the upper arm 6 rotates, and the movable frame 7 moves up and down, so that the shade S opens and closes with the vertical movement. It should be noted that FIG. 1A shows a state in which the position of the shade S is the open/close center position, and FIG. 1B shows a state in which the position of the shade S is the open end position.

A control unit 3 is electrically connected to the motor 2, and an operation switch 11 provided in a driver's seat or the like is electrically connected to the control unit 3.
When the operation switch 11 is operated (for example, pressed once), the control unit 3 drives the motor 2 to move the position of the shade S to one of the open/close end positions even when the operation switch 11 is in the non-operation state. The so-called auto function is controlled. Specifically, for example, when the operation switch 11 is once pressed while the shade S is at the closed end position, the control unit 3 causes the motor 2 to drive the drive current to move the position of the shade S to the open end position. Continue to supply. Further, for example, when the operation switch 11 is pressed once while the shade S is at the open end position, the control unit 3 supplies a drive current to the motor 2 to move the position of the shade S to the closed end position. to continue. In addition, for example, when the operation switch 11 is pressed while the motor 2 is being driven, the control unit 3 supplies the drive current to the motor 2 so as to move the shade S to the side opposite to the direction in which the shade S was being moved. After stopping, the drive current in the opposite direction is supplied to the motor 2.

  Further, the control unit 3 performs a lock determination process of determining that the motor 2 is in the locked state when the amount of change in the current value of the motor 2 exceeds a preset threshold value X, and a preset mask time when the motor 2 is started. The mask process for determining the unlocked state is performed for the amount regardless of the result of the lock determination process. In the present embodiment, the amount of change in the current value of the motor 2 is obtained by detecting the current value of the motor 2 every 3 ms and using the current value, the total (or average value) of the current values for the past 150 ms. Is calculated as the difference between the total (or average value) of the current values in the past 150 ms to the past 300 ms, and the control unit 3 calculates the change amount (difference) every 3 ms.

  Then, the control unit 3 of the present embodiment changes the mask time in the mask processing according to the position of the shade S. Specifically, the control unit 3 sets the mask time when the position of the shade S is at the opening/closing end position as the first mask time M1 (200 ms in this embodiment), and the position of the shade S is the intermediate opening/closing position (opening/closing end). The mask time when it is in a position other than the partial position) is set as a second mask time M2 (300 ms in this embodiment) longer than the first mask time M1.

Further, when the control unit 3 determines in the lock state by the lock determination process, the power supply to the motor 2 is stopped.
Next, the operation and action of the sunshade drive device configured as described above will be described.

  For example, as shown in FIG. 2, when the operation switch 11 is pressed once with the shade S in the open end position (timing t1), the controller 3 supplies a drive current to the motor 2. At this time, first, the current value of the motor 2 rapidly increases (starting current) and quickly decreases, and the change amount of the current value exceeds the preset threshold value X, but the first mask time M1 (main In the embodiment, it falls below the threshold value X before exceeding 200 ms). Therefore, the masking process of the control unit 3 determines the unlocked state, the supply of the drive current to the motor 2 is continued, and the closing operation of the shade S is continued.

Then, for example, near the open/close center position, the load increases due to the influence of the attitude of the link mechanism 1 and the current value of the motor 2 also increases.
Then, for example, when the operation switch 11 is pressed near the opening/closing center position during the closing operation of the shade S while the motor 2 is being driven (timing t2), the shade S is moved to the opposite side to the moving direction. In order to move the motor 2, the control unit 3 stops the supply of the drive current to the motor 2, and then supplies the drive current in the opposite direction to the motor 2 (timing t3). At this time, first, the current value of the motor 2 rapidly increases (starting current), and after that, the current value becomes a large current value due to the influence of the attitude of the link mechanism 1, and the amount of change in the current value is equal to the preset threshold value X. It greatly exceeds and does not converge easily, but falls below the threshold value X before exceeding the second mask time M2 (300 ms in this embodiment). The amount of change in the current value exceeds the threshold value X when the first mask time M1 (200 ms in the present embodiment) has elapsed, but the second mask time M2 (300 ms in the present embodiment). ), it falls below the threshold value X. Therefore, it is determined by the masking process of the control unit 3 that the lock state is unlocked, the drive current is continuously supplied to the motor 2, and the opening operation of the shade S is continued.

  Then, when the shade S reaches the open end position, the current value of the motor 2 sharply increases (lock current), the large current value is continued, and the change amount of the current value is the threshold value X set in advance. Over. Then, the lock determination process of the controller 3 determines that the motor 2 is in the locked state, and the power supply to the motor 2 is stopped.

  Further, for example, as shown in FIG. 3, the operation switch is in a state where the shade S is at the open end position and a load or the like is placed above the shade S (movable frame 7) (already pinched state). When 11 is pressed once (timing t4), the control unit 3 supplies the drive current to the motor 2. At this time, first, the current value of the motor 2 rapidly increases (starting current), the shade S does not move due to the luggage, and the large current value continues, and the amount of change in the current value is a preset threshold value. Exceeds the value X. Specifically, the amount of change in the current value exceeds the threshold value X when the first mask time M1 (200 ms in the present embodiment) has elapsed, but the second mask time M2 (in the present embodiment, When 300 ms) has elapsed, it is below the threshold value X. Since the mask time at this time is the first mask time M1 (200 ms in this embodiment), it is determined by the lock determination process of the control unit 3 that the lock state is present, and the power supply to the motor 2 is stopped. It If the mask time is set to the second mask time M2 (300 ms in the present embodiment) even when the shade S is at the open/close end position, this locked state cannot be detected and the motor 2 is driven. The current will continue to be supplied.

Next, the characteristic effects of the above embodiment will be described below.
(1) The lock determination process for determining that the control unit 3 is in the locked state when the amount of change in the current value of the motor 2 exceeds a preset threshold value X, and the preset mask when the motor 2 is started. The mask process for determining the unlocked state is performed for the time period regardless of the result of the lock determination process. The control unit 3 changes the masking time in the masking process according to the position of the shade S. Therefore, the masking considering a current value having a different waveform depending on the posture of the link mechanism 1 with respect to the position of the shade S and the like. The mask processing can be performed in time, and it is possible to highly accurately determine whether or not the lock state is established.

  In the present embodiment, the mask time when the position of the shade S is at the open/close end position is the first mask time M1 (200 ms), and the mask time when the position of the shade S is at the open/close intermediate position is the first mask time. Since the second mask time M2 (300 ms), which is longer than M1, is set, it is possible to specifically determine with high accuracy whether or not the lock state is established.

(2) When the control unit 3 determines that the motor 2 is in the locked state, the power supply to the motor 2 is stopped.
(3) When the operation switch 11 is operated (for example, pressed once), the control unit 3 drives the motor 2 so as to move the position of the shade S to one of the open/close end positions even in the non-operation state. Those having a so-called automatic function. Therefore, for example, more effects can be obtained as compared with the case where the motor 2 is driven only while the operation is continued. That is, in the case of driving the motor 2 only while the operation is continued, the operator may stop the operation immediately after seeing that the shade S is not moving. If it is not detected, there is a high possibility that the auto function will continue to energize for a long time, so that it is highly effective to be able to determine the locked state with high accuracy.

The above embodiment may be modified as follows.
In the above embodiment, the mask time at the open/close end position is set as the first mask time M1 (200 ms), and the mask time at the open/close intermediate position is set as the second mask time M2 (300 ms). Alternatively, if it is changed so as to be able to determine whether or not it is in the locked state with high accuracy according to the position of the shade S, it may be changed to another section or time. For example, the mask time may be changed according to the position of the shade S in three steps or more or in no step. Further, for example, the mask time when the position of the shade S is at the open end position and the mask time when it is at the closed end position may be different.

  In the above-described embodiment, the control unit 3 stops the power supply to the motor 2 when it is determined that the lock state is set. However, the present invention is not limited to this. For example, when the control section 3 determines that the lock state is set, it is used. You may make it control to notify a person.

  In the above-described embodiment, when the operation switch 11 is operated (for example, pressed once), the control unit 3 causes the motor 2 to move the position of the shade S to one of the open/close end positions even in the non-operation state. However, the present invention is not limited to this and may be one that does not have such an auto function.

The technical ideas that can be understood from the above embodiment will be described below.
(A) A motor for opening and closing the shade through a link mechanism, a lock determination process for determining that the motor is in a locked state when the amount of change in the current value of the motor exceeds a preset threshold value, and When the motor is activated, a control unit that performs a mask process that determines a non-locked state regardless of the result of the lock determination process for a preset mask time is provided, and the control unit is in the middle of the opening/closing operation of the shade. The sunshade drive device is characterized in that the mask time is set longer when the reversing operation is performed than when starting from the opening/closing end position.

  According to this configuration, the control unit determines that the motor is in the locked state when the amount of change in the current value of the motor exceeds a preset threshold value, and the preset mask time when the motor is started. The mask process for determining the unlocked state is performed for the amount regardless of the result of the lock determination process. Then, when the reversing operation is performed in the middle of the opening/closing operation of the shade by the control unit, the mask time is longer than when starting from the opening/closing end position, so it is highly accurately determined whether or not it is in the locked state. It becomes possible.

  1... Link mechanism, 2... Motor, 3... Control part, 11... Operation switch, M1... 1st mask time, M2... 2nd mask time, X... Threshold value, S... Shade.

Claims (3)

A motor for opening and closing the shade via a link mechanism,
The result of lock determination processing for determining that the motor is in a locked state when the amount of change in the current value of the motor exceeds a preset threshold value, and the lock determination processing for a preset mask time when the motor is started. Regardless of which, a control unit that performs a mask process for determining the unlocked state is provided,
The control unit changes the mask time in the mask processing according to the position of the shade ,
The control unit sets the mask time when the position of the shade is at the opening/closing end position as a first mask time, and sets the mask time when the position of the shade is at the opening/closing intermediate position from the first mask time. A sunshade drive device, wherein the second mask time is set to be long . The sunshade drive device according to claim 1 , wherein
The sunshade drive device, wherein the control unit stops power supply to the motor when the control unit determines that the lock state is established. The sunshade drive device according to claim 2 , wherein
When the operation switch is operated, the control unit drives the motor so as to move the position of the shade to one of the open/close end positions even when the operation switch is not operated. apparatus.