JP2002139354A - Indication position correcting apparatus and indicating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicating position correcting apparatus and an indicating apparatus for surely resetting a difference between a designated position where a driven member abuts on a stopper to actually stop a pointer, and a designated position where the pointer is to be stopped. SOLUTION: A stepping motor 1 is rotated by a correcting driving means 8a-3 to correct the difference between a designated position for actually stopping the pointer stored in a storage means 9 and a true designated position where to stop the pointer is to be stopped, after the rotation of the stepping motor 1 has stopped by a drive stopping means 8a-2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointing position correcting device and a pointing device, and more particularly, to a pointing position correcting device for correcting a position of a pointer linked to a rotation operation of a stepping motor, and a pointing position correcting device. The present invention relates to a pointing device provided.

[0002]

2. Description of the Related Art Conventionally, as a pointing device incorporating the above-described pointing position correcting device, for example, a pointing device having a pointer for indicating a vehicle speed or an engine speed is known. As shown in FIG. 7, in the above-described pointing device, the two exciting coils 1a1, 1a2 and the NS pole are alternately magnetized by five poles, and the rotating device follows the change in the exciting state of the exciting coils 1a1, 1a2. A stepping motor 1 having an armature 1b, a hand 2 linked to the rotation of the rotor 1b, a gear 3 for transmitting the rotation of the rotor 1b to the hand 2, and an excitation state of the excitation coils 1a1, 1a2. A drive control device 4 for rotating the rotor 1b in the forward and reverse directions.

When the pointing device is used, for example, in a vehicle speedometer, the drive control device 4 includes a target position θ, which is a pointing position of the pointer 2 calculated based on vehicle speed information measured by a vehicle speed sensor, and a current position θ. The angle data D1 indicating the rotation angle of the rotor 1b corresponding to the movement amount θ-θ ′, which is the difference from the rotation angle θ ′, is supplied. Then, the drive control device 4 transmits the angle data D
By controlling the excitation state of the excitation coils 1a1 and 1a2 according to 1, the pointer 2 moves by the difference θ−θ ′ to indicate the target position.

In the pointing device described above, the movement amount of the pointer 2 (= the difference θ−) due to the vibration of the vehicle body or the input of the angle data D1 on which noise is superimposed, or the like.
θ ′) and the actual amount of movement may cause a step-out. And when this step-out is repeated,
A difference occurs between the speed indicated by the pointer 2 and the speed information measured by the speed sensor, and the indicating device cannot perform an accurate instruction.

Therefore, in order to solve such a problem, as shown in FIG. 8, the pointer 2 is set to zero (for example, 0 km / h).
The stopper 5 is provided at the position indicating
Each time the pointer 2 is turned off or the battery is connected, the pointer 2 is moved to the stopper 5 side, and is brought into contact with the stopper 5 to forcibly stop at the zero position. The reset operation for resetting the difference between the speed information is performed.

[0006]

However, when the stopper 5 is provided on the dial 7 of the indicating instrument as described above, the appearance of the indicating device is impaired. Therefore, as shown in FIG. 7, a driven member 6 is provided on the gear 3 on the back side of the dial 7 and a stopper 5 for mechanically stopping the driven member 6 is provided. The pointer 2 indicates the zero position on the dial 7 at the position where the driven member 6 contacts the stopper 5. By doing so, the stopper 5 does not appear on the surface, and the appearance of the pointing device is not impaired.

However, generally, in this type of stepping motor, it is necessary to drive the pointer 2 into a pointer shaft (not shown) which rotates together with the gear 3. If the driving of the pointer with respect to the pointer shaft is displaced, the pointer 2 does not indicate zero at the position where the driven member 6 abuts on the stopper 5 but indicates a position shifted by the displacement of the driving. For this reason, there is a gap between the speed indicated by the pointer and the speed information measured by the speed sensor, and there has been a problem that an accurate instruction cannot be performed.

Accordingly, the present invention focuses on the above-mentioned problems, and the driven member abuts against a stopper,
Pointing position correction that can rotate the stepping motor to reset the difference between the predetermined position where the pointer actually stops and the true predetermined position where the pointer should stop, so that accurate instructions can be given. Provided is an apparatus and an indicating device that can perform an accurate instruction by resetting a difference between an actual predetermined position of the pointer and a true predetermined position at which the pointer should stop when the driven member contacts the stopper. The task is to

[0009]

Means for Solving the Problems The invention according to claim 1 made to solve the above problems is as shown in FIG.
In response to the input of the command signal, the driven member interlocking with the rotation operation of the stepping motor 1 mechanically stops the rotation of the stepping motor by abutting on the driven member, and simultaneously rotates the stepping motor. Driving means for rotating the stepping motor so that a pointer interlocking with the operation stops at a predetermined position corresponding to the contact position with the driven member, and a driving member for rotating the stepping motor, and the driven member contacts the stopper. After that, a drive stop means for electrically stopping the rotation of the stepping motor by the drive means, and the predetermined position at which the pointer actually stops,
A storage unit for storing a deviation amount from a true predetermined position at which the pointer should be stopped, and the drive stopping unit corrects the deviation amount after electrically stopping rotation of the stepping motor. The pointing position correction device is provided with a correction driving means for rotating a stepping motor to stop the pointer at the true predetermined position.

According to the first aspect of the present invention, the driving means 8
a-1, the driven member interlocked with the rotation operation of the stepping motor 1 in response to the input of the command signal, mechanically stops the rotation of the stepping motor 1 by contact with the driven member, The stepping motor 1 is rotated so as to move to a stopper that stops a pointer linked to the rotation operation of the stepping motor 1 at a predetermined position corresponding to the contact position with the driven member. After the driven member comes into contact with the stopper, the drive stopping means 8a-2 is driven by the driving means 8a-
1 electrically stops the rotation of the stepping motor 1. The correction drive unit 8a-3 is provided with a drive stop unit 8a-2.
After the rotation of the stepping motor 1 is stopped, the stepping amount is corrected so that the difference between the predetermined position where the pointer actually stored in the storage means 9 stops and the true predetermined position where the pointer should be stopped is corrected. The pointer is stopped at the true predetermined position by rotating the motor 1.

Therefore, even if it is not possible to accurately drive the pointer on the pointer shaft, the drive stopping means 8a
After the stop of the rotation of the stepping motor 1 by -2, if there is a deviation between the predetermined position corresponding to the contact position where the hands actually stop and the true predetermined position, the correction driving means 8a-3 is activated. By rotating the stepping motor 1 so as to correct the displacement amount stored in the storage means 9,
It can be placed in a true predetermined position.

The invention according to claim 2 is the pointing position correction device according to claim 1, wherein the correction driving means rotates the stepping motor at a smaller step angle than the driving means. Exists.

According to the second aspect of the present invention, attention is paid to the fact that the amount of deviation between the predetermined position at which the pointer actually stops and the predetermined position at which the pointer should stop is small, and the correction driving means 8a
-3 is a step angle smaller than the driving means 8a-1,
The stepping motor 1 is rotated. Therefore, when the driven member is directed to the stopper in response to the input of the command signal, the stepping motor 1 can be quickly rotated at a step angle larger than the correction driving unit 8a-3. On the other hand, when correcting a small deviation amount, the correction can be accurately performed at a smaller step angle than the driving unit 8a-1.

According to a third aspect of the present invention, there is provided the pointing position correction apparatus according to the first or second aspect, as shown in the basic configuration diagram of FIG.
Adjusting operation means SW11 provided for performing an operation of an adjusting operation for disposing the pointer at the true predetermined position; and adjusting driving means 8a-4 for performing the adjusting operation in accordance with the operation of the adjusting operation means. In order to perform an operation of a writing operation for storing the amount of deviation between the actual predetermined position and the true predetermined position where the hands are arranged as a result of the adjustment operation of the adjustment operation means in the storage means. Write operation means S provided
The pointing position correction apparatus further includes W12 and writing means 8a-5 for performing the writing operation in accordance with the writing operation of the writing operation means.

According to the third aspect of the present invention, the adjustment driving means 8a-4 is operated in accordance with the operation of the adjustment operation means SW11.
The stepping motor 1 is rotated forward and backward. Writing means 8a
-5 stores the amount of deviation between the actual predetermined position in response to the operation of the writing operation means SW12 and the true predetermined position where the pointer is to be stopped as a result of the operation of the adjustment operation means SW11. 9 is performed. Therefore, the shift amount can be easily stored in the storage unit 9 by operating the adjustment operation unit SW11 and the write operation unit SW12.

According to a fourth aspect of the present invention, as shown in the basic configuration diagram of FIG. 1, in the pointing position correction apparatus according to the third aspect, when there are a plurality of stepping motors, one of the plurality of stepping motors is used. Further comprising a selection operation means SW13 provided for performing an operation of a selection operation of selecting one of the two, and a selection means 8a-6 for performing the selection operation in accordance with an operation of the selection operation means; Rotates the selected stepping motor 1 in response to the operation of the adjusting operation means, and enables the writing means to identify the selected stepping motor 1 in response to the operation of the writing operation means. Then, the deviation amount exists in the pointing position correction device stored in the storage means.

According to the fourth aspect of the present invention, when there are a plurality of stepping motors 1, the selection operation means SW13
It is provided for performing an operation of a selection operation for selecting one of the plurality of stepping motors 1. Selection means 8a-6
Performs the selection operation in response to the operation of the selection operation means SW13. Then, the adjustment driving means 8a-4 rotates the selected stepping motor 1 according to the operation of the adjustment operation means SW11, and the writing means 8a-5 switches the writing operation means SW.
12, the selected stepping motor 1
Are stored in the storage means 9 so that the data can be identified. Therefore, by providing the selection operation means SW13 for selecting one of the plurality of stepping motors 1, the adjustment operation means SW1 is provided for each of the plurality of stepping motors 1.
1. There is no need to provide a plurality of write operation means SW12.

According to a fifth aspect of the present invention, as shown in the basic configuration diagram of FIG. 1, there is provided a pointing position correcting apparatus according to the third or fourth aspect, wherein an existing position adjusting device is provided for performing a predetermined operation. A switch, the operation mode of the existing switch, the normal mode in which the predetermined operation is performed according to the switch operation, and the adjustment operation, the writing operation, or the selection operation according to the switch operation. And a switching means 8a-7 for switching between the writing mode and the writing mode, in which the existing switch is used as the adjustment operation means, the writing operation means, or the selection operation means. Exists in the device.

According to the invention described in claim 5, the switching means 8
a-7 is to change the operation mode of the existing switch between a predetermined operation mode in which a predetermined operation is performed according to the switch operation and a writing operation in which an adjustment operation, a writing operation, or a selection operation is performed according to the switch operation. By switching between the modes, the existing switch is used as the adjustment operation unit SW11, the writing operation unit SW12, or the selection operation unit SW13. Therefore, the adjustment switch SW1 is separately provided from the existing switch.
1. Write operation means SW12 or selection operation means SW13
There is no need to provide

According to a sixth aspect of the present invention, in the pointing position correcting apparatus according to the fifth aspect, when the ignition switch is turned on simultaneously with the operation of the existing switch, the switching means switches from the normal mode. , A pointing position correction device for switching to the writing mode.

According to the invention of claim 6, the switching means 8
When a-7 turns on the ignition switch simultaneously with the operation of the existing switch, the predetermined operation mode is switched to the write mode. Therefore, if the ignition switch is turned on at the same time as the operation of the existing switch, the mode can be switched to the write mode without providing additional operation means.

The invention according to claim 7 is the invention according to claim 5 or 6.
4. The pointing position corrector according to claim 1, wherein said existing switch is an odd trip switch.

According to the seventh aspect of the present invention, an odd trip switch is used as the adjusting operation means SW11, the writing operation means SW12, or the selection operation means SW13, so that the adjustment is performed separately from the odd trip switch. Operation means SW11, writing operation means SW12 or selection operation means S
There is no need to provide W13.

According to an eighth aspect of the present invention, there is provided the pointing position correction apparatus according to any one of the fifth to seventh aspects, further comprising a dot matrix display for displaying an operation content according to an operation of the existing switch. A pointing position correction device for displaying an operation content according to an operation of the existing switch in the writing mode by using the dot matrix display.

According to the eighth aspect of the present invention, the dot matrix display for displaying the operation content according to the operation of the existing switch is used to respond to the operation of the existing switch in the writing mode. Displays the operation details. Therefore, in order to grasp the operation contents according to the existing switch operation in the writing mode, it is not necessary to provide a display for displaying the operation contents separately from the dot matrix display.

According to a ninth aspect of the present invention, the stepping motor 1, a driven member interlocked with the rotation of the stepping motor, a pointer interlocked with the rotation of the stepping motor, and a contact between the driven member and the driven member. According to the above, the stop of the stepping motor is mechanically stopped, the stopper stops the pointer at a predetermined position corresponding to the contact position with the driven member, and the driven member is Driving means 8a-1 for rotating the stepping motor toward the stopper, and drive stopping means for electrically stopping the rotation of the stepping motor by the driving means after the driven member comes into contact with the stopper. 8a-2, a storage for storing a deviation amount between the predetermined position at which the pointer actually stops and a true predetermined position at which the pointer should be stopped. Step 9 and the correction driving means for rotating the stepping motor and stopping the hands at the true predetermined position so as to correct the deviation amount after the driving of the stepping motor is stopped by stopping the driving of the stepping motor. 8a-3.

According to the ninth aspect of the present invention, the driving means 8
a-1, the driven member interlocked with the rotation operation of the stepping motor 1 in response to the input of the command signal, mechanically stops the rotation of the stepping motor 1 by contact with the driven member, The stepping motor 1 is rotated so as to move to a stopper that stops a pointer linked to the rotation operation of the stepping motor 1 at a predetermined position corresponding to the contact position with the driven member. After the driven member comes into contact with the stopper, the drive stopping means 8a-2 is driven by the driving means 8a-
1 electrically stops the rotation of the stepping motor 1. The correction drive unit 8a-3 is provided with a drive stop unit 8a-2.
After the rotation of the stepping motor 1 is stopped, the stepping amount is corrected so that the difference between the predetermined position where the pointer actually stored in the storage means 9 stops and the true predetermined position where the pointer should be stopped is corrected. The pointer is stopped at a true predetermined position by rotating the motor 1.

Therefore, even if the pointer cannot be accurately driven into the pointer shaft, after the driving stop means 8a-2 stops the rotation of the stepping motor 1, the pointer stops at a predetermined position corresponding to the contact position where the pointer actually stops. If there is a deviation from the true predetermined position, the correction driving means 8a-3
Is corrected by the amount of displacement stored in the storage means 9,
In order to rotate the stepping motor 1, the pointer can be arranged at a true predetermined position.

According to a tenth aspect of the present invention, in the pointing device according to the ninth aspect, the moving direction of the pointer when the driven member rotates the stepping motor so as to be directed to the stopper. When the moving direction of the pointer when the stepping motor is rotated is set to the forward direction so that the pointer moves away from the stopper, the pointer moves when the driven member comes into contact with the stopper. , Is driven into the pointer shaft so as to stop in the reverse direction side by a predetermined amount from the true predetermined position, and the correction driving unit moves in the forward direction by an amount corresponding to the deviation amount, The pointing device rotates the stepping motor.

According to the tenth aspect, the pointer is:
The driven member is driven into the pointer shaft such that when the driven member comes into contact with the stopper, the driven member is shifted in the opposite direction by a predetermined amount from the true predetermined position and stopped. The correction driving unit rotates the stepping motor 1 in the forward direction by an amount corresponding to the deviation amount. After the driven member contacts the stopper,
The pointer cannot be moved any further in the reverse direction.
Therefore, if the driving of the pointer deviates in the positive direction from the true predetermined position, the deviation amount cannot be reset. Therefore, by intentionally driving the pointer to the pointer axis so as to stop at a position shifted in the reverse direction by a predetermined amount from the true predetermined position, the driving of the pointer to the pointer axis is performed in the forward direction. Even if it is displaced, the pointer can be reliably stopped at a true predetermined position.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing a pointing device incorporating the pointing position correction device of the present invention. The indicating device includes a speedometer 101, a tachometer 102 (not shown), a fuel meter 103 (not shown), and a water temperature gauge 104. The speedometer 101 has two excitation coils 11a1 and 11a2 and five NS poles alternately magnetized, and each of the two excitation coils 11a1 and 1a2
Rotor 11 that rotates following the change in the excitation state of 1a2
b).

Tachometer 102, fuel meter 10
3 and the water thermometer 104 similarly have two exciting coils 12a1 and 12a2,... 14a1 and 14a2, respectively.
,.., 14b.

The speedometer 101 is further provided with a pointer 21 interlocked with the rotation of the rotor 11b, a gear 31 for transmitting the rotation of the rotor 11b to the pointer 21, for example, on the back side of the gear 31, and the rotation of the rotor 11b. The rotor 61 is driven by the piece 61 as a driven member and the contact with the piece 61.
There is provided a stopper 51 for mechanically stopping 1b.

The pointer 2 when the stepping motor 11 is rotated so that the piece 61 faces the stopper 51
The rotation direction of the pointer 21 when the stepping motor 11 is rotated so that the rotation direction of the pointer 1 is away from the stopper 51 is the forward direction Y2.

The speedometer 101, tachometer 102,
Excitation coils 11a1 and 11a2... 14a1 and 14a2 in the fuel meter 103 and the water temperature gauge 104
Is connected to a microcomputer 8 (hereinafter, referred to as μCOM8). The output of the excitation signal from the μCOM 8 causes the excitation coils 11a1 and 11a
,..., 14a1 and 14a2 change, and each of the rotors 11b,.

An ignition switch (hereinafter, referred to as IGSW), not shown, is connected to the above-mentioned μCOM8, and an H-level ON signal S1 output when the IGSW is turned on is supplied. μCOM8 is also supplied with angle data D1 to D4. This angle data D
1 to D4 are calculated based on the measured values of the vehicle speed, the engine speed, the fuel remaining amount, and the water temperature respectively measured by a speed sensor, a rotation speed sensor, a remaining amount sensor, and a water temperature sensor (not shown).

More specifically, for example, the angle data D
Numeral 1 indicates an angle corresponding to a movement amount θ−θ ′, which is a difference between the target position θ, which is the indicated position of the pointer 21, calculated based on the vehicle speed information measured by the vehicle speed sensor, and the current position θ ′. .

By the way, when the pointer 61 abuts on the piece 61 and the stopper 51, the pointer 21 is stopped at a predetermined angle from the position indicating zero (hereinafter referred to as the zero position) at a predetermined angle in the reverse direction Y1. Driving into the shaft. For this reason, as shown in FIG. 3, the pointer 21 moves the position shifted in the reverse direction Y1 by the shift angle θ (= the predetermined angle ± the shift angle generated at the time of driving) at the position where the piece 61 contacts the stopper 51. Instruct and stop. The predetermined angle is set to a value larger than a deviation angle generated when the pointer 21 is driven into the pointer shaft, and is, for example, 1 degree to 2 degrees. For this reason,
Even if the pointer 21 is displaced in the forward direction Y2 when the pointer 21 is driven into the pointer shaft, the pointer 21 is surely moved in the reverse direction Y1 from the zero position.
Stop on the side. Tachometer 102, fuel meter 1
03, the same applies to the water thermometer 104.

Further, the μCOM 8 is further connected to an EEPROM 9 (= storage means) which is a rewritable nonvolatile memory for storing a deviation angle for each instrument. The deviation angle is manually written in advance, for example, in a factory. For this reason, an odd trip switch SW1 (hereinafter, referred to as an O / T switch SW1) used as a means for performing a writing operation and an operation content corresponding to the operation of the O / T switch SW1 are displayed on the μCOM8. The liquid crystal display 10 is connected.

The above-mentioned μCOM 8 is a central processing unit (CPU) 8a that performs various processes according to a program.
ROM 8b, which is a read-only memory storing a processing program executed by the CPU 8a, a work area used in various processing steps in the CPU 8a, a data storage area for storing various data, and the like, which are readable and writable. A built-in RAM 8c and the like are interconnected by a bus line (not shown).

The details of the operation of the pointing device incorporating the pointing position correction device having the above-described configuration will be described below with reference to the flowcharts of FIGS. First, the CPU 8a starts the operation by turning on the IGSW, for example, and in a first step (not shown),
After initializing various areas formed in the RAM 8c in the μCOM 8, the process proceeds to the first step S1.

The CPU 8a first sets the O / T switch SW1
It is determined whether or not is turned on (step S1). At this time, if only the IGSW is turned on alone (N in step S1), the CPU 8a performs the normal driving process until the above-described IGSW is turned off and the output of the on signal S1 is stopped (step S2). .

The normal driving process includes the angle data D1,
.., An excitation signal corresponding to D4 is output, and each excitation coil 1
By controlling the excitation states of 1a1 and 11a2,..., 14a1 and 14a2, the angle data D1,.
, And 14b are rotated forward and backward by an angle corresponding to. By this normal driving process, each pointer 2
1,..., 24 indicate the respective measurement values.

Thereafter, the IGSW is turned off, and the ON signal S
When the output of 1 is stopped (Y in step S3) and the signal level becomes L, the CPU 8a functions as a driving unit and performs a zero-zero driving process (step S4). The return-to-zero drive processing means that the excitation coils 11a1, 11a2,.
The excitation states of 1 and 14a2 are sequentially controlled to obtain a piece 61,
, 64 rotate the rotors 11b,..., 14b so that the rotors 11b,. By this return-to-zero drive processing, the hands 21,...
It will sequentially go to the zero position.

From the above, the stop of the output of the ON signal S1 when the IGSW is OFF is the command signal in the claims.
In addition, the timing of the return-zero driving process is not limited to when the IGSW is turned off, but may be, for example, when the IGSW is turned on or when a vehicle-mounted battery is mounted.

Thereafter, the CPU 8a functions as a drive stopping means, and the pieces 61,.
14b, the excitation signals output to the rotors 11b,... 14b are stopped, and the rotors 11b,.
A drive stop process is performed to stop the rotation of the motor 14b electrically in the order of contact (step S5). Specifically, the contact determination is made based on the presence or absence of an induced voltage generated in a detection coil provided near the rotors 11b,..., 14b.

That is, when an induced voltage is generated in the detecting coil, the rotors 11b,..., 14b are rotating and the pieces 61,. You can judge. On the other hand, when no induced voltage is generated in the detection coil, the rotor 11
.., 64 and the stopper 51,
, 54, it can be determined that the operation has been stopped mechanically.

In the embodiment of the present invention, the exciting coils 11a1 and 1a at the timing controlled to the non-excited state in the return-to-zero driving process are used as the detecting coils.
, 14a1, and 14a2 are diverted.
By the way, the pointer 21 after the drive stop processing is performed,
.., 24 are shifted in the opposite direction by a shift angle θ (a predetermined angle ± a shift angle generated at the time of driving), as shown in FIG.
Deviation from true zero position.

Then, the CPU 8a functions as a correction driving means, and performs a correction driving process (step S5).
6) End the operation. Correction drive processing means EEPRO
In this process, the rotors 11b,... 14b are sequentially rotated again so that the hands 21,..., 24 of the instruments stored in M9 are rotated in the positive direction Y1 by the shift angle.

As described above, by the correction driving process, E
To correct the misalignment angle stored in the EPROM 9,
The rotor 11b in the stepping motors 11,.
.., 14b are sequentially rotated, so that the hands 21,.
4 can be placed at the true zero position.

Therefore, the pieces 61,...
.., 24 are reset between the zero position where the hands 21,..., 24 actually stop and the true zero position where the hands 21,. As a result,
The pointers 21,..., 24 can accurately indicate a measured value by the rotational drive in the normal drive processing in step S2 described above.

Also, the pieces 61,...
After contacting with 1,..., 54, the hands 21,.
It cannot move further in the reverse direction Y1. Therefore, if the driving of the hands 21,..., 24 is shifted in the positive direction Y2 with respect to the zero position, the deviation angle θ cannot be reset. Therefore, as described above, the hands 21,..., 24 are intentionally moved in the reverse direction Y from the zero position.
By driving the pointer shaft so as to stop at the position shifted to the first side, the hands 21,.
,..., 24 can be reliably stopped at the true zero position even if a deviation occurs in the forward and reverse directions.

As shown in FIG.
, 24 are actually stopped, and the hands 21, ...,
Focusing on the fact that the deviation angle θ from the true zero position at which 24 should be stopped is very small,
The PU 8a outputs an excitation signal such that the step angle of the rotors 11b,..., 14b according to the change in the excitation state of the excitation coil becomes smaller than the step angle of the above-mentioned zero-return drive processing.

Therefore, according to the stop of the ON signal output, the pieces 6
, 64 are directed to the stoppers 51,..., 54 at a large step angle.
4b can be quickly rotated. On the other hand, when correcting the slight deviation angle θ, the correction can be accurately performed with a small step angle.

On the other hand, if the O / T switch SW1 is turned on at the same time as the IGSW is turned on (Y in step S1), the process proceeds to steps S7 to S22 in FIG. Here, each pointer 2 is set in accordance with the operation of the O / T switch SW1.
,..., 24 are written. For this reason, the CPU 8a functions as a switching unit,
The operation mode of the / T switch SW1 is changed from the normal mode in which the display of the odd distance and the trip distance on the liquid crystal display 10 is switched according to the switch operation, and the shift angle is stored in the EEPROM 9 according to the switch operation. The mode is switched to a write mode in which various operations for writing are performed.

That is, in this writing mode, when the O / T switch SW1 is short-pressed first, the liquid crystal display 10 sequentially displays "1" every time the O / T switch SW1 is short-pressed.
“2” → “3” → “4” → “1” blinks (steps S7-14). “1” indicates the speedometer 101 and “2”
Is the tachometer 102, and “3” is the fuel meter 10
In FIG. 3, “4” is a number corresponding to each of the water temperature gauges 104, and a lighted display indicates that the corresponding meter can be selected.

Then, for example, when the user
Is written in the EEPROM 9, first, the O / T switch SW1 is short-pressed to "1".
Blinking (step S7). Thereafter, when the O / T switch SW1 is pressed and held (N in step S8 and Y in step S15), the CPU 8a sets the speedometer flag F1.
Is turned on, and the speedometer (ie, the stepping motor 1 of the speedometer) is selected (step S16).

As is apparent from the above, the O / T switch SW1 functions as a selection operation means, and the CPU 8a
Works as a selection means. At the same time CPU8
“a” lights up and displays “1” on the liquid crystal display 10. This light-on display of “1” indicates that the speedometer 101 among a plurality of instruments is used.
Is a display notifying that the user has selected.

Similarly, in the case of the tachometer 102, "2"
Flashing display (step S9), "3" in the case of the fuel meter 103, flashing display (step S11), and "4" in the case of the water temperature meter 104, flashing display (step S13). , The O / T switch SW1 is long-pressed (N in steps S8, 10, 12, or 14 and Y in steps S15, 17, 19, or 21).

By the long press of the O / T switch SW1, "2", "3" or "4" is displayed on the liquid crystal display 10, respectively.
Is displayed, and the tachometer flag F2, the fuel meter flag F3, or the water temperature meter flag F4 is turned on, and each meter is selected (steps S16, S18, S2).
0 or 22).

After one of the meters has been selected, the pointer of the selected meter is shifted by the shift angle θ to the opposite side of the true zero position, as shown in FIG. The procedure for writing the deviation angle θ in the EEPROM 9 will be described below with reference to the flowchart of FIG. First, the O / T switch SW1
Is short-pressed (Y in step S23), and the CPU 8a causes the liquid crystal display 10 to blink "F" (step S24).

The blinking display of "F" indicates that the pointer of the instrument corresponding to the ON flag is rotated by a predetermined angle in the positive direction Y2 by a short push operation of the O / T switch SW1. Is displayed to indicate that is rotated in the forward direction. Therefore, when the O / T switch SW1 is short-pressed thereafter (Y in step S25), the CPU 8a performs an adjustment operation of outputting an excitation signal for rotating the rotor forward in response to this operation (step S26). Moves the pointer in the positive direction Y2 by a predetermined angle. As is apparent from the above operation, it is understood that the O / T switch SW1 functions as an adjusting operation unit, and the CPU 8a functions as an adjusting driving unit.

The CPU 8a has an O / T switch SW
The display of "F" is illuminated for each short press operation of 1, notifying that the switch operation has become effective, and adding the count value K of the shift angle area formed in the RAM 8c (step S27). As a result of the short-pressing operation of the O / T switch SW1, when the pointer reaches the true zero position,
When the T switch SW1 is pressed and held (step S28)
Y), and proceed to the next steps S35 and S36.

On the other hand, if the pointer of the selected meter is deviated from the zero position in the forward direction Y2 as a result of the short-pressing operation of the O / T switch SW1, this deviation angle is obtained in the following procedure. is written into the EEPROM 9. First, press and hold the O / T switch SW1 (step S2
3 and Y in step S29), the CPU 8a causes the liquid crystal display 10 to blink "R" (step S29).
30).

The blinking display of "R" is displayed by rotating the O / T switch SW1 so that the pointer of the instrument corresponding to the ON flag is rotated in the reverse direction Y1 by a predetermined angle. This is a display that tells the child to rotate in the reverse direction. Therefore, when the O / T switch SW1 is short-pressed (Y in step S31), the CPU 8a performs an adjustment operation of outputting an excitation signal for rotating the rotor in reverse according to the operation (step S32). The pointer moves in the opposite direction Y1 by a predetermined angle. In the above operation, O
The / T switch SW1 functions as an adjusting operation means,
U8a functions as an adjustment drive unit.

The CPU 8a has an O / T switch SW
The display of "R" is turned on for each short press operation of 1, to inform that the switch operation has become effective, and to subtract the count value K of the deviation angle area formed in the RAM 8c (step S33).

If the O / T switch SW1 is short-pressed and the O / T switch SW1 is long-pressed (Y in step S34) when the pointer is at the true zero position,
The CPU 8a proceeds to step S35. Step S35
, The CPU 8a functions as a writing unit and
A write operation process for writing in the EEPROM 9 the count value of the shift angle area in 8c as the shift angle of the selected meter. In the above operation, the O / T switch SW1
Functions as writing means, and the CPU 8a functions as writing means.

After the end of the write operation processing, the CPU 8a waits until the IGSW is turned off and the supply of the on signal is stopped (Y in step S36), and ends the operation (see FIG. 4). By the operation shown in the flowcharts of FIG. 5 and FIG. 6, the operation of the O / T switch SW1
The shift angle can be easily stored in the EEPROM 9.

In the above-described embodiment, when the O / T switch SW1 is operated at the same time when the IGSW is turned on, the operation mode of the O / T switch SW1 is switched from the normal mode to the write mode, and the O / T switch SW1 is turned on. It is possible to divert the respective operation means for performing the operation of the forward / reverse adjustment operation, the writing operation, and the selection operation. For this reason, O /
The T switch SW1 does not require a separate operation unit such as a switch for performing a rotation operation, a writing operation, or a selection operation, so that cost can be reduced.

However, if there is no cost limitation, for example, as shown in FIG. 2, the switching terminal N, the clockwise terminal FW, the counterclockwise terminal RE, and the write terminal S
And an operation means such as a switch (not shown) for performing a forward / reverse adjustment operation, a writing operation, or a selection operation is provided separately from the O / T switch SW1. Operation can also be reduced.

In the above-described embodiment, in the write mode, the O / T switch SW1 first functions as a selection operation means, and can select one of a plurality of instruments (ie, a stepping motor). When the meter is selected, the O / T switch SW1 functions as an adjusting operation unit or a writing operation unit, and the CPU 8a performs a rotation operation and a writing operation in response to the operation of the O / T switch SW1. I was going.

As described above, by selecting one of a plurality of instruments (ie, stepping motors), an adjusting operation and a writing operation are performed corresponding to each of the plurality of instruments (ie, stepping motors). It is not necessary to provide a plurality of operation means such as switches for the operation, and the cost can be reduced.

However, if there is no limitation on cost, a switch is provided for each instrument, and a rotating operation and a writing operation are performed on the instrument corresponding to the switch in accordance with the operation of the switch. It is also conceivable to reduce this. Also, by using the one O / T switch SW1 described above as each operation means for performing two operations of the forward / reverse adjustment operation and the write operation,
We are trying to reduce costs. However, in this case as well, if there is no cost limitation, it is conceivable to separately provide switches for performing the rotation operation and the writing operation.

In the above-described embodiment, the liquid crystal display 10 for displaying the odd distance and the trip distance is normally used to display the operation content of the O / T switch SW1 in the writing mode. Is going. For this reason, the operation contents according to the operation of the O / T switch SW1 in the writing mode can be grasped, and the operation contents according to the operation of the O / T switch SW1 in the writing mode are displayed. To
Since it is not necessary to provide the liquid crystal display 10 separately, the cost can be reduced.

Further, in the above-described embodiment, the O / T switch SW1 has been described as an example of the existing switch. However, existing switches in the vehicle are
Not limited to the / T switch SW1, for example, an optical brightness setting switch, a clock date setting switch, and the like are also conceivable.

[0076]

As described above, according to the first aspect of the present invention, the driving of the stepping motor 1 by the driving stop means is stopped even if the driving of the pointer to the pointer shaft cannot be performed accurately. If there is a deviation between the predetermined position corresponding to the contact position where the hands actually stop and the true predetermined position, the correction driving unit corrects the deviation by the deviation amount stored in the storage unit. Then, by rotating the stepping motor, the pointer can be arranged at the true predetermined position, so that the driven member comes into contact with the stopper and the predetermined position at which the pointer actually stops, and the true position at which the pointer should stop Thus, it is possible to obtain a pointing position correction device that can rotate the stepping motor so as to surely reset the difference between the predetermined position and the predetermined position.

According to the second aspect of the invention, when the driven member is caused to face the stopper in response to the input of the command signal, the stepping motor can be quickly rotated at a step angle larger than the correction driving means. . On the other hand, when correcting a small deviation amount, since the correction can be accurately performed at a smaller step angle than the driving means, the actual predetermined position of the pointer and the predetermined position at which the pointer should stop quickly and accurately can be corrected. The pointing position correction device that can rotate the stepping motor so as to reset the difference between them can be obtained.

According to the third aspect of the present invention, the shift amount can be easily stored in the storage means by operating the adjusting operation means and the writing operation means, so that a user-friendly pointing position correction device is obtained. be able to.

According to the fourth aspect of the present invention, the selection operation means for selecting one of the plurality of stepping motors is provided, so that the plurality of adjustment operation means and the writing means correspond to each of the plurality of stepping motors. Since there is no need to provide an operation means, it is possible to obtain a pointing position correction device that reduces costs.

According to the fifth aspect of the present invention, there is no need to provide an adjusting operation unit, a writing operation unit, or a selection operation unit separately from the existing switch. Can be obtained.

According to the sixth aspect of the present invention, when the ignition switch is turned on simultaneously with the operation of the existing switch, the mode can be switched to the write mode without providing additional operation means, so that the cost can be reduced. The intended pointing position correction device can be obtained.

According to the seventh aspect of the present invention, there is no need to provide an adjusting operation means, a writing operation means or a selection operation means separately from the odd trip switch. A position correction device can be obtained.

According to the eighth aspect of the present invention, in order to grasp the operation contents according to the existing switch operation in the writing mode, the display for displaying the operation contents is a dot matrix display. Since it is not necessary to separately provide the pointing position correction device, it is possible to reduce the cost.

According to the ninth aspect of the present invention, even if it is not possible to accurately drive the pointer on the pointer shaft, it is possible to correspond to the contact position where the pointer actually stops after the rotation of the stepping motor is stopped by the drive stopping means. When the deviation between the predetermined position to be performed and the true predetermined position has occurred, the correction driving unit corrects the deviation amount stored in the storage unit to rotate the stepping motor so as to correct the deviation. Since the driven member abuts on the stopper, the difference between the predetermined position where the pointer actually stops and the predetermined position where the pointer should stop can be reliably reset because the driven member abuts on the stopper. An indicating device capable of performing the above-mentioned operations can be obtained. According to the invention as set forth in claim 10, the guideline is dared.
By driving the pointer shaft so as to stop at a position shifted in the opposite direction by a predetermined amount from the true predetermined position,
Even if the driving of the pointer to the pointer shaft is shifted in the forward direction, the pointer can be stopped at the true predetermined position without fail.The pointer actually stops when the driven member contacts the stopper. It is possible to obtain a pointing device that can more reliably reset the difference between the predetermined position to be set and the predetermined position where the pointer should stop.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a pointing position correction device according to the present invention and a basic configuration of the pointing device.

FIG. 2 is a diagram showing an embodiment of a pointing device incorporating a pointing position correction device of the present invention.

FIG. 3 is a diagram for explaining a shift angle caused by driving of a pointer to a pointer shaft.

4 is a flowchart showing a processing procedure of a CPU constituting a pointing device incorporating the pointing position correction device of FIG. 2;

5 is a flowchart showing a processing procedure of a CPU constituting a pointing device incorporating the pointing position correction device of FIG. 2;

6 is a flowchart showing a processing procedure of a CPU constituting a pointing device incorporating the pointing position correction device of FIG. 2;

FIG. 7 is a diagram illustrating an example of a pointing device incorporating a conventional pointing position correction device.

FIG. 8 is a diagram showing an external view of a pointing device incorporating a conventional pointing position correction device.

[Explanation of symbols]

 Reference Signs List 1 stepping motor 2 pointer 5 stopper 6 driven member (piece) 8a-1 drive means (CPU) 8a-2 drive stop means (CPU) 8a-3 correction drive means (CPU) 8a-4 adjustment drive means (CPU) 8a -5 Writing means (CPU) 8a-6 Selection means (CPU) 8a-7 Switching means (CPU) 9 Storage means (EEPROM) SW11 Adjustment operation means (odd trip switch) SW12 Writing operation means (odd trip switch) SW13 selection operation means (Od trip switch)

Claims (10)

[Claims] A driven member that is interlocked with the rotation of the stepping motor in response to the input of the command signal, mechanically stops the rotation of the stepping motor by abutting on the driven member; Driving means for rotating the stepping motor so that a pointer interlocked with the rotation operation of the stepping motor stops at a predetermined position corresponding to the contact position with the driven member, and a driving means for rotating the stepping motor; A drive stop means for electrically stopping the rotation of the stepping motor by the drive means after contacting the stopper; a predetermined position at which the hands are actually stopped; and a true predetermined position at which the hands are to be stopped. Storage means for storing the displacement amount of the stepping motor, and the drive stopping means corrects the displacement amount after electrically stopping the rotation of the stepping motor. The pointing position correction device, further comprising: a correction driving unit that rotates the stepping motor to stop the pointer at the true predetermined position. 2. The pointing position correction device according to claim 1, wherein the correction driving unit rotates the stepping motor at a smaller step angle than the driving unit. 3. The pointing position correction device according to claim 1, wherein the pointing step correction motor is provided to perform an adjustment operation of rotating the stepping motor in a forward / reverse direction to dispose the pointer at the true predetermined position. The adjustment operation means, the adjustment drive means for performing the adjustment operation in accordance with the operation of the adjustment operation means, the actual predetermined position, and the pointer as a result of the adjustment operation of the adjustment operation means. A writing operation unit provided for performing an operation of a writing operation for storing the amount of deviation from the true predetermined position in the storage unit; And a writing means for performing a writing operation. 4. The pointing position correcting apparatus according to claim 3, wherein when there are a plurality of stepping motors, a selection operation provided to perform an operation of a selection operation of selecting one of the plurality of stepping motors. Means, further comprising a selection means for performing the selection operation in response to the operation of the selection operation means, wherein the adjustment drive means rotates the selected stepping motor in response to the operation of the adjustment operation means. The pointing position correction apparatus, wherein the writing unit stores the displacement amount in the storage unit so that the selected stepping motor can be identified according to an operation of the writing operation unit. 5. The pointing position correction device according to claim 3, wherein an existing switch provided for performing a predetermined operation and an operation mode of the existing switch are changed according to the operation of the switch. Switching means for switching between a normal mode in which the predetermined operation is performed and a writing mode in which the adjustment operation, the writing operation, or the selecting operation is performed in accordance with the switch operation; The pointing position correction device, wherein the existing switch is diverted as the adjustment operation unit, the writing operation unit, or the selection operation unit. 6. The pointing position correction device according to claim 5, wherein the switching unit operates the existing switch at the same time as operating the existing switch.
A pointing position correction device characterized in that when the ignition switch is turned on, the normal mode is switched to the writing mode. 7. The pointing position correction device according to claim 5, wherein the existing switch is an odd trip switch. 8. The pointing position correction device according to claim 5, further comprising: a dot matrix display for displaying an operation content according to an operation of the existing switch. A pointing position correction device for displaying an operation content according to an operation of the existing switch in the writing mode by using a device. 9. A stepping motor, a driven member interlocked with a rotation operation of the stepping motor, a pointer interlocked with a rotation operation of the stepping motor, and a rotation of the stepping motor by contact with the driven member. And a stopper for stopping the pointer mechanically and stopping the pointer at a predetermined position corresponding to the contact position with the driven member. The driven member is directed to the stopper in response to a command signal input. Drive means for rotating a stepping motor; drive stop means for electrically stopping rotation of the stepping motor by the drive means after the driven member comes into contact with the stopper; and A storage means for storing an amount of deviation between a predetermined position and a true predetermined position at which the pointer should be stopped; and After driving stop of Ngumota, so as to correct the deviation amount, the by rotating the stepping motor, an instruction device, characterized in that it comprises a said correcting drive means for stopping said pointer to said true position. 10. The pointing device according to claim 9, wherein the direction of movement of the pointer when the stepped motor is rotated so that the driven member is directed to the stopper is set to the opposite direction, and the stopper is moved. When the direction of movement of the pointer when the stepping motor is rotated is set to be a positive direction so that the pointer moves away from the stopper, the pointer moves when the driven member comes into contact with the stopper and the true predetermined position is reached. The correction driving unit rotates the stepping motor in the forward direction by an amount corresponding to the deviation amount. An indicating device characterized by the above-mentioned.