JPH10286048A - Electric source voltage monitoring apparatus for fishing electrically driven reel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric source voltage monitoring apparatus for an electrically-driven reel, capable of detecting whether an external electric source voltage is in a proper voltage range by a simple constitution. SOLUTION: An external electric source voltage is divided by voltage divider resistances R1 and R2 , voltage divider output is impressed on an inverted input terminal of a voltage comparator 23, output of a voltage transducer 21 is divided to give a divided output, which is impressed on a noninverted input terminal of the voltage comparator. Further, a cathode terminal of Zener diode ZD is connected to a positive electrode of the external electric source and an anode terminal to the noninverted input terminal of the voltage comparator. When the external electric source voltage is lower than the upper limit voltage of the proper voltage range of a microcomputer 22, voltage divider output of resistors R3 and R4 for voltage divider is inputted to the noninverted input terminal of the voltage comparator and when the external electric source voltage is higher, a voltage corresponding to the upper limit voltage in a proper voltage range of the microcomputer 22 is impressed on the noninverted input terminal of the voltage comparator by sending an electric current flowing in the Zener diode ZD to R4 . The external electric source voltage is compared with the proper voltage. When the external electric source voltage is out of the proper voltage range, the drive of the microcomputer 22 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fishing reel for monitoring whether or not a power supply used for an electric reel for fishing (hereinafter, simply referred to as an "electric reel") is within a power supply range usable by the electric reel. The present invention relates to a power supply voltage monitoring device for a reel.

[0002]

2. Description of the Related Art Electric reels are widely used for deep-field fishing on fishing boats and the like. The electric reel not only performs electric winding by a motor drive, but also calculates a yarn feeding amount from a rotation number of a spool using a microcomputer (hereinafter, referred to as a “CPU”), and automatically calculates a yarn feeding amount to a predetermined water depth. Generally, it is provided with a function as a so-called shelf reel that can take out a thread, that is, a so-called shelf can be provided.

As a power source for such an electric reel, an external power source or an external power source permanently installed on a fishing boat is usually used. The supplied voltage is in a voltage state suitable for driving a motor built in the electric reel, CP responsible for reel control
It is necessary to monitor whether the voltage is in a voltage range suitable for the operation of U, and therefore, a power supply voltage monitoring device is required. Conventional power supply voltage monitoring devices for electric reels include CP
A semiconductor element (a reset IC, a voltage monitoring IC, etc.) for sending a signal relating to the state of the power supply voltage to U, or a discrete circuit combining a resistor, a capacitor, a Zener diode, a transistor and the like has been used. As another method, the CPU of the A / D converter is applied to constantly monitor the voltage of the external power supply device, and when the voltage exceeds a high limit voltage, the CPU functions as an electric reel (thread length measurement display). , Motor winding, etc.).

[0004]

However, in a conventional reset IC or a discrete circuit used so far, a low limit voltage can be detected but a high limit voltage cannot be detected. However, there is a problem that the element and the motor cannot be protected.

When a reset IC (PST575) marketed by a semiconductor maker (Mitsumi Electric) is used,
This reset IC is configured to supply a reset signal to the CPU in response to an output signal when the output transistor is turned on, since the output transistor having the open collector configuration is turned on when the input voltage becomes equal to or lower than a predetermined voltage. However, this IC has an operation limit voltage of the IC internal elements, and has a problem that the on state (output of logic 0) of the output transistor cannot be maintained at an input voltage lower than a certain level.

The resistors R11 and R11 shown in FIG.
12, a commercialized discrete circuit composed of a capacitor C11, a Zener diode ZD, and a transistor TR is used, as shown in FIG. 4, an interrupt signal (I
NT), the external power supply voltage V _B is not rise even reach the upper limit voltage of the electric reel drive (18V), it is impossible to stop the CPU 22.

[0007] As shown in FIG. 5, by utilizing an A / D converter built-in CPU, the external power supply voltage V _B of the resistor R21, R2
Divided by 2 in addition to the A / D conversion input port of the CPU 22, the method of constantly CPU 22 is monitoring the external power supply voltage V _B, to detect the upper limit voltage (18V), the next A
The / D conversion equation, obtains the digital value of the external power supply voltage V _B, is detected by comparing with a previously configured digital values to CPU22 of the ROM (not shown).

V _B (digital value) = (V _AD / V _REF ) × 256 = (V _PWR / V _RER ) × {R22 / (R21 + R22)}
× 256 However, when the CPU 22 with a built-in A / D converter is used, the CPU 22 to be used is expensive, and the number of external signal pins is large, so that the shape of the CPU 22 is large, and the electric reel is integrated into a simple function and small shape. Was inconvenient.

Accordingly, the present invention provides a low-cost fishing electric reel which can detect the upper and lower limit voltages of the external power supply voltage with a simple configuration, and can reduce the size of the electric reel and simplify the functions. It is intended to provide a power supply voltage monitoring device.

[0010]

According to the present invention, there is provided a microcomputer operating in an appropriate voltage range defined by an upper limit voltage and a lower limit voltage.
In the power supply voltage monitoring device for a fishing electric reel (10), the first reference voltage corresponding to the lower limit voltage is supplied when the voltage supplied from the external power supply (15) is lower than the upper limit voltage. 1 reference voltage supply means (21, R3,
R4) and second reference voltage supply means (ZD, 21) for supplying a second reference voltage corresponding to the upper limit voltage when the voltage supplied from the external power supply (15) is higher than the upper limit voltage.
R3, R4), a first input terminal to which a first reference voltage and a second reference voltage are selectively applied, and an external power supply (15).
Has a second input terminal to which a power supply voltage signal representing a voltage supplied from the external power supply (15) is applied. When the voltage supplied from the external power supply (15) is lower than the upper limit voltage, the first reference voltage is set to the first input voltage. And when the voltage supplied from the external power supply (15) is higher than the upper limit voltage, a second reference voltage is applied to the first input terminal and applied to the second input terminal respectively. A voltage comparator (23) for comparing with the power supply voltage signal, and when the voltage supplied from the external power supply (15) is out of an appropriate range, the voltage comparator (23) is stopped by the microcomputer (22). A power supply voltage monitoring device (20) for an electric fishing reel (10) that outputs a signal to stop the operation of the microcomputer (22).

Further, the present invention incorporates a microcomputer (22) which operates in an appropriate voltage range defined by an upper limit voltage and a lower limit voltage, and uses an external power supply voltage supplied from an external power supply (15) to the microcomputer (22). 22) A power supply voltage monitoring device for use in an electric fishing reel provided with a voltage converter (21) for converting into a stabilized voltage suitable for the operation of (22) and outputting the same, wherein an inverting input terminal and a non-inverting input terminal are connected to each other. A voltage comparator (23) having an output terminal connected to the microcomputer (22), and a divided output obtained by dividing an external power supply voltage is applied to an inverting input terminal of the voltage comparator (23). A first voltage-dividing resistor (R1, R2) and a second voltage-dividing output obtained by dividing the output of the voltage converter (21) to a non-inverting input terminal of the voltage comparator (23).
And a Zener diode (ZD) having a cathode terminal connected to the positive terminal of the external power supply (15) and an anode terminal connected to the non-inverting input terminal of the voltage comparator (23). , The second voltage dividing resistors (R3, R
The first voltage dividing resistor (R1, R2) and the second voltage dividing resistor (R) such that the divided voltage output of 4) corresponds to the lower limit voltage of the appropriate voltage range of the microcomputer (22).
3, R4), and a Zener diode (ZZ) whose Zener voltage (Vz) corresponds to the upper limit voltage of the appropriate voltage range of the microcomputer (22).
An external power supply voltage monitoring circuit for the electric fishing reel selected in D) is provided.

In this case, the microcomputer is stopped when the external power supply voltage is equal to or higher than the upper limit voltage and equal to or lower than the lower limit voltage of the appropriate voltage range of the microcomputer, using a voltage comparator having a maximum rating of the power supply voltage of 24 V or more. RO for configuring the microcomputer
Preferably, it is stored in M.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an electric reel 10 and an electric reel 10 to which a power supply voltage monitoring device according to the present invention is applied.
1 shows an external power supply 15 for supplying power to the power supply.

As shown in FIG. 1, a spool 2 is rotatably mounted on the reel body 1. A fishing line (not shown) is wound around the spool 2, and the unwound fishing line can be wound up by the manual handle 3,
Electric spooling can also be performed by a spool driving motor 5 via a speed reduction mechanism 4 built in the spool 2. A motor drive section 6 for switchingly driving the spool drive motor 5 is embedded in the thumb rest section 16 located in front of the spool 2. The reel unit 1 is provided with a control unit 7, a display unit 8, an operation push button switch group 9 including a winding switch, a stop switch, and the like, and a power supply receptacle 11. The display unit 8 displays the thread take-out amount calculated by the control unit 7, data relating to the shelf position, and the like.

The power supply receptacle 11 is a power supply connection portion projecting from the reel body 1 and having a substantially cylindrical outer shape, a screw portion formed on the outer peripheral surface, and two male contacts at the center portion. Electrodes 11a and 11b are provided upright. An external power supply 15 can be connected to the power supply receptacle 11 using a power supply cable 12. As the external power supply 15, a battery power supply as shown in FIG. In this example, the external power supply 15 that is compatible with the electric reel 10 supplies a voltage of 12 V to the reel body 1.

The power cable 12 shown in FIG. 1 has a power plug 13 at one end and connection clips 14a and 14b to the plus and minus terminals of the external power supply 15 at the other end. The power plug 13 of the power cable 12 has a screw portion formed on an inner peripheral surface thereof which can be screwed with a screw portion formed on an outer peripheral surface of the power receptacle 11, and a male contact of the power receptacle 11 is formed at a central portion. Electrodes 11a, 11
A female contact electrode fitted to b is provided.
Male contact electrode 11a of power supply receptacle 11,
11b and the female contact electrode of the power cable 12 are fitted in a fixed positional relationship, and the threaded portion of the outer peripheral surface of the power receptacle 11 and the thread formed on the power plug 13 of the power cable 12 are screwed together. The cable 12 can be connected to the power supply receptacle 11 so as not to fall off. Connection clip 14a, 1 of power cable 12
4b is connected to the negative electrode and the positive electrode of the external power supply 15, respectively.

FIG. 2 shows a circuit configuration of the power supply voltage monitoring device 20 according to the embodiment of the present invention. The power supply voltage monitoring device 20 forms a part of the control unit 7. The power supply voltage monitoring device 20 determines whether the voltage supplied from the external power supply 15 is a voltage suitable for driving the spool driving motor 5 or a voltage suitable for operation of the microcomputer that controls the electric reel 10. This is a device for monitoring the situation. That is, there is an appropriate voltage range for driving the electric reel 10, and if a voltage lower than the lower limit voltage is supplied, or if a voltage higher than the upper limit voltage is supplied, the voltage is deviated from the appropriate range. It is necessary to control to perform a predetermined operation different from a normal operation.

As shown in FIG. 2, the power supply receptacle 11
The negative contact electrode 11a is grounded, the positive contact electrode 11b is connected to a voltage converter (REG) 21 via a first backflow prevention diode D1, and the voltage converter 21 further includes a second A power supply terminal _{VDD of the} CPU 22 and a built-in secondary battery C2 as a sub-power supply built in the reel body 1 are connected via a backflow prevention diode D2. The cathode of the first backflow prevention diode D1 is grounded via the capacitor C1. A series circuit of voltage dividing resistors R1 and R2 is connected between the cathode of the first reverse current prevention diode D1 and the ground, and the connection point of the voltage dividing resistors R1 and R2 is connected to the inverting input of the voltage comparator 23. Connected to terminal.

A Zener diode ZD is connected in the reverse direction between the cathode of the first backflow prevention diode D1 and the non-inverting input terminal of the voltage comparator 23. That is, the cathode (K) is connected to the positive contact electrode 11b side, the anode (A) is connected to the non-inverting input terminal side of the voltage comparator 23, and a reverse voltage is applied to the Zener diode ZD. I have. When the reverse voltage is equal to or lower than a predetermined voltage (in the present embodiment, equal to or lower than 16.8 V), the Zener diode ZD exhibits a high impedance and substantially no current flows. Current flows, and the voltage between the cathode and the anode is kept constant.

A capacitor C3 is connected between the output terminal of the voltage converter 21 and the ground, and a series circuit of voltage dividing resistors R3 and R4 is connected in parallel with the capacitor C3.
The connection point between the voltage dividing resistors R3 and R4 is connected to the non-inverting input terminal of the voltage comparator 23 and the anode of the Zener diode ZD. The output terminal of the voltage comparator 23 is connected to an interrupt terminal (INT) of the CPU 22. A resistor R5 is connected between the second backflow prevention diode D2 and the interrupt terminal of the CPU 22.

Next, the operation of the power supply voltage monitoring device 20 configured as described above will be described.

[0022] When the power receptacle 11 external power supply 15 to the electric reel 10 is connected, the external power supply 15 is the power supply voltage V _B supplied appearing in positive contact electrode 11b of the power supply receptacle 11. Supply voltage V _B is applied to the voltage converter 21 via the first backflow prevention diode D1.
The input voltage to the voltage converter 21 is _defined as V _PWR . Input voltage V _PWR corresponds to the supply voltage V _B of the external power supply 15. The voltage converter 21 is provided for lowering the input voltage _VPWR so as to conform to the operating voltage range of the CPU 22. If the input voltage _VPWR is equal to or higher than a predetermined value, the voltage converter 21 operates at a constant voltage V ^+. Is output.

The constant voltage output V ⁺ from the voltage converter 21 is
When the voltage is applied to the start input terminal _VDD of the CPU 22 via the second backflow prevention diode D2, the built-in secondary battery C
2 is also applied. As a result, the CPU 22 becomes operable by receiving power supply, and the built-in secondary battery C2 is charged. The built-in secondary battery C2 is for backing up the CPU 22. For example, when the electric reel 10 is connected to the external power supply 15 and the power supply cable 12 connecting the power supply receptacle 11 and the external power supply 13 is disconnected during operation, the built-in secondary battery C2 is disconnected.
Even if the power supply to the PU 22 is interrupted, the built-in secondary battery C2
Backs up the CPU 22 and temporarily holds data relating to the thread take-out amount and shelf position being displayed on the display unit 8. Thereafter, when the external power supply 13 is connected to the power supply receptacle 11, the data is continuously displayed on the display unit 8 based on the held data. In this embodiment, a voltage of about 4.6 V is supplied from the built-in secondary battery C2.

The constant voltage output V ⁺ of the voltage converter 21 is divided by the voltage dividing resistors R3 and R4, and the connection point voltage of both resistors is applied to the non-inverting input terminal of the voltage comparator 23 as the reference voltage _Vref. . In this embodiment, since the voltage dividing resistors R3 and R4 are set to 47 KΩ and 15 KΩ, respectively, when the constant voltage output V ⁺ of the voltage converter 21 is 5 V, the reference voltage _Vref is obtained by the following equation. V _ref = V ⁺ × R4 / (R3 + R4) = 5.0 × 15 / (47 + 15) ≒ 1.21 [V] On the other hand, the voltage V _PWR is applied to the inverting input terminal of the voltage comparator 23.
Is divided by the voltage dividing resistors R1 and R2, that is, the resistor R
The voltage V _{CM at} the connection point between 1 and R2 is applied. The voltage V _CM applied to the inverting input terminal of the voltage comparator 23 is obtained by the following equation. V _CM = V _PWR × R2 / (R1 + R2) The output of the voltage comparator 23 is high (logic 1) when the voltage V _{CM at the} inverting input terminal is lower than the reference voltage V _ref applied to the non-inverting input terminal. When the voltage V _CM exceeds the reference voltage V _ref , the level changes from high level to low level (logic 0).
Changes to The voltage V _{CM at the} inverting input terminal is equal to the reference voltage V _ref
V _PWR when is equal to is given by the following equation. V _CM = V _ref = _VPWR × R2 / (R1 + R2) From the above equation, V _PWR = {(R1 + R2) / R2} × _{Vref In} this embodiment, the voltage dividing resistors R1 and R2 are 58.
Since 2 KΩ and 15 KΩ are set, V _PWR = {(58.2 + 15) / 15} × 1.21 = 5.9 [V] That is, the input voltage V _PWR to the voltage converter 21 is 5.9 V or less. , The output from the voltage comparator 23 is at a high level, and when the input voltage V _PWR exceeds 5.9 V, the voltage comparator 2
The output from 3 changes from high level to low level.
When the input voltage V _PWR is 5.9 V or higher and 18.01 V (V
_PWR = Vz + _Vref = 16.8 + 1.21 = 18.0
When 1V) or less, the Zener diode VZ is high impedance and is not substantially the current flows through the Zener diode ZD, the input voltage V _PWR has 18.01V
When it becomes larger, the impedance of the Zener diode ZD rapidly decreases and current starts to flow. As a result, the current flowing through the Zener diode ZD is superimposed on the resistor R4, and the voltage drop at the resistor R4 increases accordingly. This voltage drop, the reference voltage V than the input voltage V _CM
ref becomes higher, and the output of the voltage comparator 23 changes from low level to high level.

When the Zener diode ZD has a high impedance and no current flows through the Zener diode ZD, the input voltage V _PWR to the voltage converter 21 is applied to the inverting input terminal of the voltage comparator 23 by R2 / (R1 + R2). Is applied to the non-inverting input terminal, and a voltage obtained by dividing the output voltage V ⁺ of the voltage converter 21 by R4 / (R3 + R4) is applied, but V _CM = R ₂ × V _PWR / (R ₁ + R ₂₎ = V
_PWR /4.88 and _{V ref = R 4 × V +} / (R 3 + R 4) = V +
/4.3, the voltage converter 21 operates outside the constant voltage range and the non-inverting input terminal of the voltage comparator 23 is always used even when the input / output voltages of the voltage converter 21 are substantially equal. towards the reference voltage V _ref applied is greater than the input voltage V _CM is applied to the inverting input terminal. When the output voltage of the voltage converter 21 becomes equal to or lower than the predetermined voltage, the CPU 22 does not start.

In summary, (1) when the voltage V _PWR is 5.9 V or less, the output of the voltage comparator 23 becomes high level. (2) When the voltage V _PWR exceeds 5.9 V and is 18.0 V or less, the output of the voltage comparator 23 is at a low level. (3) When the voltage V _PWR exceeds 18.01 V, the output of the voltage comparator 23 goes high.

When the output of the voltage comparator 23 changes from a low level to a high level, the R connected to the CPU 22
An external interrupt is applied to the program stored in the OM (not shown), and the functions of the electric reel 10 (thread length measurement, display, electric winding, key input reception, etc.) are stopped.

As described above, it is monitored whether or not the input voltage to the voltage comparator 23 has exceeded the upper limit voltage 18.01V and whether or not the lower limit voltage is 5.9V or less.
At V, if an external battery of 24 V is mistakenly connected, the CPU 22 does not operate, so that the spool driving motor 5 built in the electric reel is not driven.
When an external power supply 15 is connected such that the input voltage to the voltage comparator 23 is equal to or lower than the lower limit voltage, CP
Unstable operation of U22 can be avoided.

[0029]

According to the first aspect of the present invention, a single voltage comparator has a first reference voltage corresponding to the lower limit voltage of the appropriate voltage range of the microcomputer and a second reference voltage corresponding to the upper limit voltage. The reference voltage is selectively applied, and these reference voltages are appropriately compared with the power supply voltage signal. When the voltage supplied from the external power supply is higher than the upper limit voltage of the appropriate voltage range and lower than the lower limit voltage, Since the voltage comparator outputs a stop signal to the microcomputer to stop the operation of the microcomputer, even if the microcomputer is accidentally connected to a high-voltage battery or a permanent power source for a fishing boat, the microcomputer is driven by an electric reel. Therefore, it is possible to prevent a failure or the like due to supply of an overvoltage to the motor in advance without starting the built-in spool rotation motor. In addition, even when an appropriate external power supply is used, when the power supply voltage drops, the microcomputer is similarly stopped, so that unstable operation of the microcomputer can be prevented. it can.

According to the second aspect of the present invention, a circuit for determining whether an external power supply voltage such as a battery used for an electric fishing reel and a permanent power supply for a fishing boat is in an appropriate voltage range includes a resistor and a voltage. The output signal for starting and stopping the microcomputer is obtained simply by using a comparator and a zener diode, so that a low-cost power supply voltage monitoring device can be provided. Can be realized.

According to the third aspect of the invention, even when the external power supply of 24 V or more is erroneously connected to a normal electric reel designed to use the external power supply of 12 V, The stop state can be automatically set according to the program stored in the ROM.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an electric reel to which the present invention is applied and an external power supply for supplying power to the electric reel.

FIG. 2 is a circuit diagram of a power supply voltage monitoring device according to an embodiment of the present invention.

FIG. 3 is a circuit diagram of a conventional power supply voltage monitoring device using a discrete circuit.

FIG. 4 is a diagram for explaining the operation of the circuit shown in FIG. 3;

FIG. 5 is a circuit diagram of a conventional power supply voltage monitoring device configured using a CPU with a built-in A / D converter.

[Explanation of symbols]

 Reference Signs List 10 electric reel 11 power supply receptacle 15 external power supply 20 power supply voltage monitoring device 21 voltage converter (REG) 22 microcomputer (CPU) 23 voltage comparator ZD Zener diode R1, R2, R3, R4 resistor for voltage division

Claims (3)

[Claims] 1. A power supply voltage monitoring device for a fishing electric reel incorporating a microcomputer operating in an appropriate voltage range defined by an upper limit voltage and a lower limit voltage, wherein a voltage supplied from an external power supply is lower than the upper limit voltage. To supply a first reference voltage corresponding to the lower limit voltage.
A second reference voltage for supplying a second reference voltage corresponding to the upper limit voltage when the voltage supplied from the external power supply is higher than the upper limit voltage.
Reference voltage supply means, a first input terminal to which a first reference voltage and a second reference voltage are selectively applied, and a second to which a power supply voltage signal representing a voltage supplied from an external power supply is applied. When the voltage supplied from the external power supply is lower than the upper limit voltage, the first reference voltage is applied to the first input terminal, and the voltage supplied from the external power supply is higher than the upper limit voltage. A voltage comparator for applying a second reference voltage to the first input terminal when the voltage is high, and comparing with a power supply voltage signal applied to the second input terminal. If it is out of the proper range,
The power supply voltage monitoring device for an electric reel for fishing, wherein the voltage comparator outputs a stop signal to the microcomputer to stop the operation of the microcomputer. 2. A microcomputer which operates in an appropriate voltage range defined by an upper limit voltage and a lower limit voltage,
A voltage converter for converting an external power supply voltage supplied from an external power supply into a stabilized voltage suitable for the operation of the microcomputer and outputting the stabilized voltage; A voltage comparator having an input terminal and a non-inverting input terminal, an output terminal connected to the microcomputer, and a voltage divider for applying a divided output obtained by dividing an external power supply voltage to the inverting input terminal of the voltage comparator. A second voltage-dividing resistor for applying a voltage-divided output obtained by dividing the output of the voltage converter to a non-inverting input terminal of the voltage comparator; A Zener diode having an anode terminal connected to the non-inverting input terminal of the voltage comparator, wherein the divided output of the second voltage-dividing resistor is set to a lower limit voltage of an appropriate voltage range of the microcomputer. The voltage dividing ratios of the first voltage dividing resistor and the second voltage dividing resistor are respectively selected so as to correspond, and a Zener diode whose Zener voltage corresponds to an upper limit voltage of an appropriate voltage range of the microcomputer is selected. An external power supply voltage monitoring circuit for an electric fishing reel. 3. A program for using a voltage comparator having a maximum rating of a power supply voltage of 24 V or more, and stopping the microcomputer when an external power supply voltage is equal to or more than an upper limit voltage and equal to or less than a lower limit voltage of an appropriate voltage range of the microcomputer. 3. A power supply monitoring circuit for an electric fishing reel according to claim 2, wherein the control information is stored in a ROM constituting said microcomputer.