JP2772356B2 - Fishing reel line length measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line length measuring device for a fishing reel, and more particularly, to an improved line length measuring device capable of measuring the amount of reeling-out or winding of a fishing line from the rotation speed of a spool with high accuracy. About.

[0002]

2. Description of the Related Art In recent fishing reels, the amount of fishing line fed from a spool and the amount of winding thereof are measured, and the device is accurately placed on a shelf where fish are located. You can check the point where you put in the device by measuring.

[0003] As a line length measuring device capable of measuring the amount of reeling out and winding of a fishing line, a line length measuring device disclosed in Japanese Patent Application Laid-Open No. 1-307612 filed by the present applicant has been proposed. And Japanese Patent Application Laid-Open No. 3-223614 are known.

The former yarn length measuring device disclosed in Japanese Patent Application Laid-Open No. 1-307612 discloses a sensor for detecting the rotation of a spool supported on a reel body, and an up / down counter for counting a pulse signal output from the sensor. / Down counter, light emitting means for irradiating spot light on the outer peripheral surface of the spool diameter of the spool, and a spool which detects the position of the light reflected from the outer peripheral surface with a position sensor and converts the position into an electric signal proportional to the spool diameter. Diameter measuring means, means for calculating the yarn length based on the yarn diameter data from the yarn diameter measuring means and the count value of the up / down counter, and a display for displaying the yarn length calculated by the calculating means It is composed of

According to the above yarn length measuring device, when the light emitting means irradiates the outer peripheral surface of the spool diameter of the spool, the position of the spot reflected light is detected by the position sensor of the yarn diameter measuring means and is proportional to the yarn winding diameter. The signal is converted into a signal, and the line length is calculated by the calculating means based on the line diameter signal and the number of rotations at the time of the line feeding or winding counted by the up / down counter. Is required with high accuracy.

On the other hand, the latter yarn length measuring device disclosed in Japanese Patent Application Laid-Open No. Hei 3-223614 has a sensor for detecting the rotation of a spool supported on a reel body, and counts up and down a pulse signal output from the sensor. Up /
A down counter, measuring means for emitting an ultrasonic beam to the outer peripheral surface of the spool diameter of the spool to measure the thread diameter, and a yarn length based on the thread diameter data from the measuring means and the count value of the up / down counter. And a display for displaying the thread length calculated by the calculating means.

In the above yarn length measuring device, when an ultrasonic beam is emitted from the transmitting means in the measuring means to the outer peripheral surface of the spool diameter, the reflected wave is received by the receiving means, and the time is measured by the time measuring means. The time until the ultrasonic beam emitted from the transmitting means is received by the receiving means is measured. The time measured by the time measuring means is converted into a signal proportional to the thread diameter by the thread diameter measuring means. Based on this signal and the number of rotations at the time of yarn feeding or winding counted by the up / down counter. Then, the yarn length is similarly calculated by the calculating means.

[0008]

However, in each of the above-described line length measuring devices, the light emitting means or the transmitting means constantly irradiates and emits spot light or an ultrasonic beam to the outer peripheral surface of the line winding diameter to emit the fishing line and the winding amount. Because of the structure for measuring the amount of extraction, the number of times of irradiation of the spot light and the number of times of emission of the ultrasonic beam are large, and there is a disadvantage that the battery power is greatly consumed.

[0009] Therefore, there is a possibility that undergoes battery exhaustion yarn length measuring device is unusable Tsurijo, also the incorporation of a large battery capacity in order to prevent battery exhaustion, Lille
The whole will be enlarged.

The present invention has been devised in view of such circumstances, and provides a fishing reel length measuring apparatus that consumes less battery power while maintaining the same thread length measuring function as before. With the goal.

[0011]

In order to achieve the above object, the invention according to claim 1 comprises a rotation number detecting means for detecting the rotation number of a spool rotatably supported on a reel body, and a spool of a spool. A bobbin diameter measuring means for measuring a bobbin diameter based on a bobbin diameter calculation formula by transmitting an ultrasonic wave or light to the outer peripheral surface of the diameter and receiving a reflected wave and reflected light thereof, and a peg obtained by the bobbin diameter measuring means. Calculating means for calculating the yarn length from the yarn length calculation formula based on the diameter and the count value of the rotation speed detecting means,
The yarn length measuring device of a fishing reel that includes a display for displaying the yarn length calculated by the calculating means Te at, unwinding of the fishing line
Sometimes, respectively the relationship between the line winding diameter and the number of spool rotations measured includes storage means for storing a map data, during the feeding or winding of the re fishing line in the line winding diameter measuring means and the rotational speed detecting means, rotational speed detecting means Select the thread diameter corresponding to the spool rotation speed detected in the map data,
The yarn length is calculated by the above yarn length calculation formula.

According to a second aspect of the present invention, there is provided a rotational speed detecting means for detecting a rotational speed of a spool rotatably supported by a reel body, and transmitting ultrasonic waves or light to the outer peripheral surface of a spool winding diameter. The bobbin diameter measuring means for measuring the bobbin diameter based on the bobbin diameter calculation formula by receiving the reflected wave and the reflected light, and the bobbin diameter obtained by the bobbin diameter measuring section and the count value of the rotation number detecting means. Winding a fishing line in a fishing reel line length measuring device comprising: a calculating means for calculating a line length from a line length calculating formula; and an indicator for displaying the line length calculated by the calculating unit. Alternatively, based on the number of spool rotations and the line diameter measured at an arbitrary point in time of feeding and the number of spool rotations and line diameter measured when a predetermined amount of the fishing line has been wound or unrolled from the point in time, Calculates the coefficient of speed and spool speed A storage means for storing the coefficient is provided at the stage, and at the time of feeding or winding the fishing line again, the line winding diameter is calculated from the spool rotation number detected by the rotation number detecting means and the coefficient, and the line length is calculated. The yarn length is calculated using a calculation formula.

[0013]

According to the first aspect of the invention, when the fishing line is paid out.
Then, the relationship between the spool diameter and the spool rotational speed measured by the spool diameter measuring means and the rotational speed detecting means is stored as map data in the storage means.

At the time of reeling out or winding of the fishing line again, a line diameter corresponding to the spool rotation number detected by the rotation number detecting means is selected from the map data, and a line length calculation formula is obtained from the spool rotation number and the line winding diameter. , The yarn length is calculated, and the display yarn length is displayed on the display.

According to the second aspect of the present invention, the spool rotation speed and the line winding diameter measured at any time during the winding or unwinding of the fishing line, and the time when the fishing line is wound or unwound by a predetermined amount from the time. A coefficient is calculated based on the number of rotations of the spool and the thread winding diameter measured in step (1), and the coefficient is stored in the storage means.

At the time of feeding or winding the fishing line again, the line winding diameter is calculated from the spool rotation number detected by the rotation number detecting means and the above-mentioned coefficient, and the line length is obtained by the line length calculation formula. .

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a fishing reel provided with a line length measuring device according to an embodiment of the present invention. In the drawing, 1 is a reel body, 3 is a spool rotatably supported by the reel body 1, and a spool A fishing line 5 is wound around 3.

Reference numeral 7 denotes a waterproof flat box housing the yarn length measuring device according to the present embodiment. On the upper panel 7a of the box 7, a digital display 9 for displaying the yarn length and a yarn winding diameter measuring device 11 are provided. And various switches such as a reset switch 13, a start switch 15, a stop switch 17, and the like. Further, in the bobbin diameter measuring device 11, a transmitting ultrasonic sensor 19 for emitting an ultrasonic beam to the bobbin diameter outer peripheral surface of the spool 3 as described later, and the transmitting ultrasonic sensor 19 are separately disposed. A receiving ultrasonic sensor 21 for receiving a reflected wave reflected from the outer peripheral surface of the bobbin diameter is incorporated.

FIG. 2 shows the details of the yarn length measuring device according to the present embodiment. In the figure, reference numeral 23 denotes a microcomputer which performs a yarn length calculation, a yarn length display, and data writing control. A CP that controls and manages a program memory, a data memory, a timer, and an input / output device, and executes an operation and a transfer process necessary for processing a given job.
U (central processing unit) 25, a ROM 27 for storing a thread length calculation program, a thread length calculation formula, and the like, a RAM 29 for storing data such as a calculation result in the CPU 25, and an input interface 31 and an output interface 33. These are connected to the CPU 25 via the bus 35.

A sensor 37 detects the rotation and the direction of the spool 3 and a pair of reed switches 37a and 37b.
And a plurality of magnets 37c opposed thereto and fixed to the inner peripheral edge of the spool 3.

A forward / reverse determination signal of the spool 3 obtained by turning on / off the reed switches 37a, 37b by the magnet 37c at any point is given by:
By taking in the CPU 25 via the input interface 31, the built-in up / down counter 39 is set to an up-count or down-count state. Also, when the reed switches 37a and 37b are turned ON /
The rotation pulse of the spool 3 obtained by turning OFF is supplied to the up / down counter 3 via the input interface 31.
By inputting to 9, the up / down counter 39 counts up or down.

Further, the thread diameter measuring means 11 is connected to the input interface 31 via a transmitting means 41 and a receiving means 43, and the above-mentioned reset switch 13, start switch 15, and stop switch 17 (not shown). It is connected.

The digital display 9 is connected to the output interface 33 via a decoder 45.
As described above, the winding diameter measuring means 11 is disposed separately from the transmitting ultrasonic sensor 19 for emitting the ultrasonic beam 47 to the outer peripheral surface P of the spool diameter of the spool 3 and the transmitting ultrasonic sensor 19. The reflected wave 4 reflected from the outer circumferential surface P of the thread diameter
And a receiving ultrasonic sensor 21 for receiving the signal 9.

The transmitting ultrasonic sensor 19 and the receiving ultrasonic sensor 21 have a waterproof structure having a columnar outer shape, and a terminal 55 is connected to a piezoelectric ceramic 51 via a lead wire 53 as shown in FIG. It is configured. In addition, in FIG. 7, 57 is an acoustic matching layer, 59 is a metal case, 6
1 is a base, 63 is a sealing material.

FIG. 2 also shows the details of the control means of the yarn diameter measuring device 11. This control means transmits the ultrasonic beam 47 from the transmitting ultrasonic sensor 19 to the outer peripheral surface P of the yarn diameter as described above. Transmitting means 41 comprising a transmitting circuit for emitting a laser beam; receiving means 43 comprising a receiving circuit for receiving the reflected wave 49 of the ultrasonic beam 47 reflected from the outer peripheral surface P of the bobbin diameter by the receiving ultrasonic sensor 21; And a timer 65 built in the microcomputer 23 measures a time difference Δt until the ultrasonic beam 47 emitted from the transmission ultrasonic sensor 19 is received by the reception ultrasonic sensor 21. Have been.

Then, the time difference Δt and the distance d = (the sound speed 331) to the outer peripheral surface P of the bobbin diameter stored in the ROM 27.
D is calculated from the equation [m / sec] × １ ／) × Δt.

FIG. 4 shows the transmitting means 41 and the receiving means 4.
3 shows an example in which when a signal for instructing measurement is input to the trigger terminal 67 from the CPU 25, the transistor 69 is turned off.
N, high-voltage pulse signals from the pulse transformer 71 are applied to the transmission ultrasonic sensor 19 by the number of waves of the CPU 25.

The ultrasonic beam 47 is reflected on the outer peripheral surface P of the thread diameter and becomes a reflected wave 49, and enters the receiving ultrasonic sensor 21 to induce a reception wave voltage. The reception wave voltage is received
3a, passing through a plurality of stages of amplification circuits,
3 and the microcomputer 2 from the detector terminal 75
3 is output to the input interface 31. On the other hand, the timer 65 starts with a signal instructing the measurement of the CPU 25 and ends the measurement with a signal of the detector terminal 75. Then, this time difference Δt is stored in the RAM 29 and used for calculating the distance d.

FIG. 5 shows an example of the time difference measurement. For example, the transmission ultrasonic sensor 19 sends the signal once every 0.2 seconds for 30 μs.
During this time, the transmission voltage waveform 77 is applied, and the transmission ultrasonic sensor 19 emits an ultrasonic beam 47 to the outer peripheral surface P of the thread diameter.

The reflected wave 49 reflected by the outer peripheral surface P enters the receiving ultrasonic sensor 21 and induces a voltage. This voltage is amplified by the receiving means 43 and output as the reception pulse 79, so that the time difference 150 μs from the rise of the transmission pulse to the rise of the reception pulse becomes the time difference Δt.

As shown in FIG. 2, the distance d from the transmitting ultrasonic sensor 19 and the receiving ultrasonic sensor 21 to the outer peripheral surface P of the bobbin diameter is, assuming that the sound speed is v, as described above. Since d = (v / 2) × Δt, the distance d can be obtained by measuring the time Δt.

FIG. 6 shows the relationship between the sensor output voltage appearing at the detector terminal 75 of FIG. 5 and the distance d from the sensor surface to the outer peripheral surface P of the line diameter when the fishing line 5 is fed and wound. Is plotted. The distance d and the sensor output voltage have a linear relationship. And the CPU
The thread diameter D is obtained from the reference numeral 25, and the thread length is calculated as described later.

As shown in FIG. 2, when the distance between the transmission ultrasonic sensor 19 and the reception ultrasonic sensor 21 and the spool shaft 81 of the spool 3 is c, as shown in FIG. cd−d) × 2.

In this embodiment, when the reset switch 13 is pressed when the fishing line 5 is extended at the start of fishing, map data, which will be described later, can be input and the program shown in FIG. 7 starts. Has become.

That is, when the fishing line 5 is paid out in step S 1, the spool 3 rotates in the normal rotation direction according to the feeding of the fishing line 5, and a signal in the normal rotation direction is taken in from the sensor 37 into the CPU 25 through the input interface 31. Thus, the up / down counter 39 is set in the up direction, and a pulse signal for each rotation of the spool, which is output from the sensor 37 with the rotation of the spool 3, is transmitted via the input interface 31 to the up / down counter 39. And are sequentially counted up (step S2).

In the next step S3, the count N of the up / down counter 39 is fetched into the CPU 25 at each operation cycle of the microcomputer 23, and further, the yarn winding diameter D output from the yarn winding diameter measuring device 11 every 0.2 seconds. Then, data obtained by digitally converting the voltage corresponding to by the A / D converter is fetched, and in the next step S 4, the calculation of the payout yarn length L is performed from the calculation formula of L = π · D · N in the ROM 27, The calculation result is output to the digital display 9 through the output interface 33 and the decoder 45 to digitally display the payout line length L of the fishing line 5 (step S5), and the line winding diameter D and the spool rotation speed N until the payout of the fishing line 5 is completed. Is stored in the RAM 29 as map data (step S6).

When the fish hits and winds up the fishing line 5 and pays out the fishing line 5 again, the spool rotation speed is detected based on the map data of the line winding diameter D and the spool rotation speed N stored in the RAM 29 to detect the spool rotation speed. The wound yarn winding L is calculated from the formula of L = π · D · N (step S7),
The payout yarn length L is digitally displayed on the digital display 9. At this time, the yarn winding diameter L corresponding to the detected spool rotational speed N is selected from the map data, and the yarn winding length L is calculated. It is not necessary to emit the ultrasonic beam 47 from the transmitting ultrasonic sensor 19 and obtain the thread winding diameter D as described above.

When the fishing line 5 is wound, the spool 3 rotates in the reverse direction with the winding of the fishing line 5, so that a signal in the reverse direction is output from the sensor 37 to the input interface 3.
1, the up / down counter 39 is set in the down direction, and at the same time, the pulse signal output from the sensor 37 with the reverse rotation of the spool 3 is taken into the up / down counter 39. , Is subtracted from the content counted at the time of feeding.

Therefore, the count content Na of the up / down counter 39 is taken into the CPU 25 at each calculation cycle of the microcomputer 23, and La = π · D · Na is calculated based on the count content Na and the map data. The yarn length L, which is obtained by subtracting the wound yarn length from the unwound yarn length, is calculated and displayed on the digital display 9.

If the position of the shelf is changed and the number of spool rotations N is not included in the map data, the CPU 25
The ultrasonic beam 47 is again emitted from the transmission ultrasonic sensor 19 in response to the command (2), and the map data on the relationship between the thread winding diameter D and the spool rotation speed N is additionally stored in the RAM 29.

Thereafter, in fishing, the line length display based on these map data is repeated. However, the type (material, thickness) of the fishing line 5 changes depending on fishing conditions, or the fishing line 5 may be used for a long period of time. When the map data needs to be updated, for example, when an error occurs due to the extension of the fishing line 5, the map data is set to the updated state by pressing the reset switch 13, and the above-described procedure is repeated again so that the fishing line 5 can be updated. The new map data until the end of the feeding is stored in the RAM 29.

Since the line length measuring device according to the present embodiment is configured as described above, the input of the map data requires the angler to feed the fishing line 5 at the start of fishing as described above. When the reset switch 13 is depressed and the fishing line 5 is paid out, the count content N of the up / down counter 39 is taken into the CPU 25, and the data output every 0.2 seconds outputted from the line diameter measuring device 11 is taken into the ROM 27.
Is calculated from the formula of L = π · D · N. Then, the calculation result is the payout line length L of the fishing line 5.
And the relationship between the line winding diameter D and the spool rotation speed N until the end of the feeding of the fishing line 5 is stored in the RAM 29 as map data.

When the fish hits and winds up the fishing line 5 and pays out the fishing line 5 again, the line winding diameter D corresponding to the detected spool rotation speed N is selected from the map data, and based on these data. The payout yarn winding L is calculated from the formula of L = π · D · N, and the payout yarn length L is digitally displayed on the digital display 9.

When the fishing line 5 is wound, a signal in the reverse direction from the sensor 37 is taken into the CPU 25 via the input interface 31 as described above, whereby the up / down counter 39 is set in the down direction. At the same time, a pulse signal output from the sensor 37 in accordance with the reverse rotation of the spool 3 is taken into the up / down counter 39, and is subtracted from the content counted at the time of feeding by the down-counting operation.

Then, the counting content Na of the up / down counter 39 is taken into the CPU 25 at each calculation cycle of the microcomputer 23, and La = π · D · Na is calculated based on the counting content Na and the map data. The yarn length L obtained by subtracting the winding yarn length from the fed yarn length is calculated and displayed on the digital display 9.

As described above, in the present embodiment, when the relationship between the line winding diameter D and the spool rotation speed N is stored in the RAM 29 as map data when the fishing line 5 is fed out at the start of fishing, the subsequent fishing can be performed. In this case, since the wound yarn winding L is calculated based on this map data, the ultrasonic beam 4 from the transmission ultrasonic sensor 19 is conventionally used to measure the yarn winding diameter D.
7 does not need to be constantly emitted, and the ultrasonic beam 47 may be emitted only when the map data is stored.
The number of times of emission of the ultrasonic beam 47 is reduced as compared with the related art.

Therefore, according to the present embodiment, the battery power consumption is reduced as compared with the conventional yarn length measuring device, and as a result,
There is no danger that the thread length measuring device will become unusable due to running out of batteries at the fishing ground, and it is no longer necessary to incorporate a large capacity battery in advance to prevent running out of batteries.

[0048]

[0049]

[0050]

[0051]

[0052]

[0053]

In the above embodiment, the fishing line 5 is extended.
At times, the relationship between the yarn winding diameter D and the spool rotation speed N every 0.2 second is stored in the RAM 29 as map data, and the subsequent yarn length measurement is performed based on this map data. Instead, the claims described below
According to the yarn length measuring device of one embodiment of the item 2, furthermore, the battery
Power saving is possible.

That is, with the start of fishing, when the reset switch 13 is operated in a state where the fishing line 5 has not been extended yet, the input state becomes possible, and the ultrasonic wave from the transmission ultrasonic sensor 19 is applied to the outer peripheral surface P of the line diameter. The beam 47 is configured to be fired only once.

[0056] When the ultrasonic sensor 21 receives the reflected waves 49 for reception, similar to the above real施例, CPU 2
5 is D = (v / 2) × Δt and D = (cd) ×
The spool diameter D ₀ corresponding to the spool rotation speed N ₀ (= 0) is calculated from the calculation formula 2, and based on the spool rotation speed N detected by the sensor 37 and the up / down counter 39, L = π · The calculation of D · N is performed, and the result (L = 0)
Is displayed on the digital display 9.

Then, as shown in FIG.
_At the stage where the fishing line 5 has been paid out by _one rotation, the ultrasonic beam 4 is transmitted from the transmitting ultrasonic sensor 19 to the outer peripheral surface P of the line diameter.
7 is fired only once again, and when the receiving ultrasonic sensor 21 receives the reflected wave 49, the CPU 25 similarly sets d =
From the calculation formula of (v / 2) × Δt and the calculation formula of D = (cd) × 2, the thread winding diameter D ₁ with respect to the spool rotation speed N ₁ detected by the sensor 37 and the up / down counter 39 is calculated. Then, the calculation of L = π · D · N is executed based on the spool rotation speed N ₁ , and the result is displayed on the digital display 9.

From these thread winding diameters D ₀ , D ₁ to D
= AN + b coefficients a and b are obtained by the CPU 25, and the values of the coefficients a and b are stored in the RAM 29. Thus, when the values of the coefficients a and b are determined in this manner, for example, the thread winding diameter D ₂ with respect to the spool rotation speed N ₂ (N ₀ <N ₂ <N ₁ ) is determined by D ₂ = aN ₂ + b. = Π
D · from N equation by _{L = π · D 2 · N} 2 feeding line length L with respect to the spool rotational speed N ₂ is calculated, so as to be displayed on a digital display 9 and the results as feeding yarn length L of the fishing line 5 To be configured.

When the spool rotation speed N ₁ <spool rotation speed N ₃ is detected as shown in FIG.
Sensed spool speed N bobbin diameter D ₃ which corresponds to ₃ and the coefficient of the line winding diameter _{D 0 D = aN + b a} , updates the b, configured and this coefficient a, the value of b to be stored in the RAM29 deep.

Based on this coefficient value, for example, the thread winding diameter D _{4 with} respect to the spool rotation speed N ₄ (N ₀ <N ₄ <N ₃ )
Is obtained from D ₄ = aN ₄ + b, so that L = π · D · N
Is feeding the yarn length L from equation by _{L = π · D 4 · N} 4 with respect to the spool rotational speed N ₄ of calculation, the result is configured to be displayed on the digital display 9 as feeding yarn length L of the fishing line 5 .

Thus, according to the present embodiment, the setting of the coefficient k
In this case , the transmission ultrasonic sensor 19 is controlled only at two points of the spool rotation speeds N ₀ and N ₁ or the spool rotation speeds N ₀ and N _3.
The ultrasonic beam 47 can be emitted from the transmitting ultrasonic sensor 19 as in the related art.
It is no longer necessary to fire the fishing line, and the fishing line 5 is extended.
Sometimes an ultrasonic beam 47 is fired every 0.2 seconds to map
Compared to the above embodiment in which data is stored in RAM 29,
And the number of times the ultrasonic beam 47 is fired is reduced.
It will be.

Therefore, according to the present embodiment, the intended object can be achieved similarly to the above-described embodiment, and the ultrasonic beam 47 is used to input the coefficient as compared with the above-described embodiment. Since the number of times of firing is further reduced, it is possible to further reduce battery consumption.

Also, when the fishing line 5 is fed as described above,
Te, at the stage of winding the use thread to spool 3, start time and stop you press the start switch 15 switch 17
From the respective thread winding diameter D corresponding to the stop time when
= AN + b, the coefficients a and b may be obtained, and thereafter, the drawn-out yarn length L may be calculated and displayed based on the coefficient values.

[0064] and, also by the real施例of this, as above you施例, it is possible to achieve the intended purpose.
In each of the above embodiments, two ultrasonic sensors, that is, the transmission ultrasonic sensor 19 and the reception ultrasonic sensor 21 are used. However, as described in JP-A-3-223614, transmission and reception are performed by one ultrasonic sensor. The present invention can be applied to a yarn diameter measuring device using an ultrasonic sensor, and of course, it can also be applied to a yarn diameter measuring device using a light emitting means as disclosed in JP-A-1-307612.

[0065]

As described above, claim 1 and claim 1
According to the yarn length measuring device of the fish reel fishing according to 2, to reduce the consumption of battery power than the conventional, so that a possibility that the yarn length measuring device causing the battery exhaustion in Tsurijo becomes unusable In addition, it is no longer necessary to incorporate a large-capacity battery in advance to prevent the battery from running out. Also according to claim 2
The yarn length measuring device according to claim 1,
Launches an ultrasonic beam when entering a coefficient
Battery usage is further reduced as the number of times
It is possible to make it.

[Brief description of the drawings]

1 is a perspective view of a fishing reel having a yarn length measuring apparatus according to an embodiment of claim 1.

Figure 2 is an overall configuration diagram of a yarn length measuring apparatus according to an embodiment of claim 1.

FIG. 3 is a sectional view showing an internal structure of the ultrasonic sensor.

FIG. 4 is a transmission / reception circuit diagram of the bobbin diameter detecting device.

FIG. 5 is an explanatory diagram showing the relationship between transmission and reception of an ultrasonic beam in one embodiment of the present invention.

FIG. 6 is a graph showing a relationship between a distance and a time difference.

FIG. 7 is a flowchart showing a procedure of a yarn length measurement display in one embodiment of the first embodiment.

FIG. 8 is a graph showing a relationship between a spool rotation speed and a thread winding diameter.

[Explanation of symbols]

 1 Reel Body 3 Spool 5 Fishing Line 11 Line Diameter Measuring Device 19 Transmitting Ultrasonic Sensor 21 Receiving Ultrasonic Sensor 23 Microcomputer 25 CPU 27 ROM 29 RAM 37 Sensor 47 Ultrasonic Beam 49 Reflected Wave

Claims (2)

(57) [Claims] 1. A rotation number detecting means for detecting a rotation number of a spool rotatably supported by a reel body, and transmitting ultrasonic waves or light to an outer peripheral surface of a spool winding diameter to receive a reflected wave and reflected light thereof. By doing this, a thread diameter measuring means for measuring the thread diameter based on the thread diameter calculating formula, and a thread length calculating formula based on the thread diameter obtained by the thread diameter measuring means and the count value of the rotation speed detecting means, And a display for displaying the line length calculated by the calculating unit.In the line length measuring device for a fishing reel comprising : Equipped with storage means for storing the relationship between the spool diameter and the spool diameter measured by the rotation speed detection means as map data, and corresponds to the spool rotation speed detected by the rotation speed detection means when the fishing line is fed or wound again. The thread diameter to be A line length measuring device for a fishing reel, wherein the line length is calculated by the line length calculation formula by selecting the line length from the fishing line data. 2. A rotation number detecting means for detecting a rotation number of a spool rotatably supported by a reel body, and transmitting ultrasonic waves or light to an outer peripheral surface of a spool winding diameter to receive a reflected wave and reflected light. By doing this, a thread diameter measuring means for measuring the thread diameter based on the thread diameter calculating formula, and a thread length calculating formula based on the thread diameter obtained by the thread diameter measuring means and the count value of the rotation speed detecting means, And a display for displaying the line length calculated by the calculating unit.A line length measuring device for a fishing reel comprising: The coefficient of the spool diameter and the spool speed based on the spool speed and the spool diameter measured at the time and the spool speed and the spool diameter measured at the time when the fishing line has been wound or unwound by a predetermined amount from the time. Is calculated by the calculation means, A storage means for storing the coefficient is provided, and at the time of feeding or winding the fishing line again, the line diameter is calculated from the spool rotation number detected by the rotation number detecting means and the coefficient, and the line length is calculated by the line length calculation formula. A line length measuring device for a fishing reel, wherein the calculation is performed.