JP2940888B2 - Line length measuring device for fishing reels - 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 a line length measuring device capable of measuring a feeding amount and a winding amount of a fishing line from a rotational speed of a spool with high accuracy.

[0002]

2. Description of the Related Art In recent fishing reels, a fishing line is accurately placed on a shelf where fish is measured by measuring a feeding length / a winding length of a fishing line from a spool. You can check the point at which the device was thrown by measuring the flight distance.

[0003] As a method of measuring the feeding amount and the winding amount of the fishing line, a conventional method is disclosed in, for example, Japanese Patent Application Laid-Open No. 60-244247.
As shown in the publication, a microcomputer incorporated in the reel body inputs data such as a relational expression of a thread winding amount and a spool winding diameter using the thread thickness as a parameter and a total length of the thread from a keyboard, At the time of measurement, the rotation of the spool is detected by a sensor, the pulse signal from this sensor is counted by a counter, the count value is taken into a microcomputer at each calculation cycle, and a yarn length calculation formula according to the used yarn diameter is selected. Then, the line length is calculated based on this formula, and the calculation result is output to a display to digitally display the line length of the feeding or winding up on the display for the convenience of anglers.

However, in the above-described conventional line length measuring device for fishing reels, every time the line used is changed, the data of the line thickness and the total length of the line wound on the spool are transmitted to the keyboard each time. The input operation is complicated, and the input operation becomes complicated.
Since the following formula is used, it takes a long time to calculate the thread length with a microcomputer having a low computing capacity, and when the payout speed of the thread is fast, such as when fishing, the thread length calculation speed cannot catch up with the payout speed of the thread. The thread length that changes every moment cannot be displayed instantaneously. Further, if the yarn length calculation formula is simplified, there is a problem that accurate yarn length measurement becomes impossible.

Accordingly, the present applicant has developed a fishing reel line length measuring device which solves such a problem, and disclosed it in Japanese Patent Application No. 63-137774. A fishing reel line length measuring device according to this application includes a reel body, a spool around which a fishing line rotatably supported by the reel body is wound, a sensor for detecting rotation of the spool, and a sensor for detecting the rotation of the spool. Up / down counter for counting up and down the pulse signal output from the spool, light emitting means for irradiating spot light on the surface of the spool diameter of the spool, and a position sensor for detecting the position of light reflected from the surface of the spool diameter. And a means for calculating the yarn length based on the yarn diameter data from the yarn diameter detecting means and the count value of the up / down counter. And a display for displaying the yarn length calculated by the calculating means.

[0006] In this fishing reel line length measuring device, when the light emitting means irradiates the line diameter surface of the spool,
Since the position of the spot reflected light is detected by a position sensor of the yarn winding diameter detecting means and can be converted into a signal proportional to the yarn winding diameter, the yarn winding diameter signal and the rotation at the time of yarn feeding or winding counted by an up / down counter are used. If the yarn length is calculated by the calculating means on the basis of the number of rotations corresponding to the number, the feed yarn length and the take-up yarn length can be obtained quickly and with high accuracy.
Parameters such as the thickness of the yarn and the total length of the yarn at the time of measuring the yarn length become unnecessary, and the operability of the reel is improved.

[0007]

However, in such a yarn length measuring device, since the surface of the spool is wound with spot light, a light beam output from a light emitting body such as an LED or a semiconductor laser device is used. Must be focused on the winding surface by an optical system such as a lens, and the reflected light needs to be focused on a position sensor by another optical system.

That is, when the above-described optical system is used, it is very difficult to reduce the size of the sensor section because of the presence of the optical system. However, the optical system must be changed according to the size of the reel.

The present invention has been devised in view of the above circumstances, and provides a fishing reel length measuring apparatus which is small and lightweight and which can measure a distance with high accuracy irrespective of the type of thread. The purpose is to do.

[0010]

In order to achieve the above object, the present invention provides a reel body, a spool rotatably supported on the reel body via a spool shaft and having a fishing line wound thereon, A sensor for detecting the rotation of the spool, an up / down counter for counting up and down a pulse signal output from the sensor, a transmitting means for emitting an ultrasonic beam to the surface of the spool diameter of the spool, and a surface of the spool diameter. Receiving means for receiving the reflected wave,
And a time-measuring means for measuring a time until the ultrasonic beam emitted from the transmitting means is received by the receiving means, and a thread diameter detecting means for converting the time measured by the time-measuring means into an electric signal proportional to the thread diameter. A thread diameter measuring means comprising:
The bobbin diameter data from this bobbin diameter measuring means and the above
A calculating means for calculating the yarn length based on the count value of the down counter; and a display for displaying the yarn length calculated by the calculating means. It is characterized in that it is attached to the reel body so as to be located on a plane including the axis.

[0011]

According to the present invention, the transmitting means emits an ultrasonic beam on the spool diameter surface of the spool, the reflected wave is received by the receiving ultrasonic sensor by the receiving means, and the reflected wave is emitted from the transmitting means by the timing means. The time until the received ultrasonic beam is received by the receiving means is measured. The time measured by the time-measuring means is converted into an electric signal proportional to the thread diameter by the thread-diameter detecting means. The yarn length is calculated by the calculating means on the basis of the corresponding rotation speed.

Further, according to the present invention, even if the fishing line diameter changes due to the feeding or winding of the fishing line, the transmitting means and the receiving means are located on a plane including the spool shaft. Therefore, the transmission and reception times of the ultrasonic wave are linearly corresponded to perform high-accuracy measurement.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 12 show a fishing reel according to a first embodiment of the present invention. In the drawings, reference numeral 1 denotes a spool rotatably supported by a reel body 3 and 5 denotes a manual handle. Rotational force of a spool drive motor (not shown) disposed in the spool 1 is transmitted to the spool 1 by a reduction gear mechanism 7 mounted in the reel body 3 so that the fishing line 9 is fed and wound. Has become.

Reference numeral 11 denotes an electronic control mechanism housing for housing a control mechanism for a fishing reel, and a digital display 13 for displaying a line length is provided on an operation panel thereof. The electronic control mechanism housing 11 is mounted on the reel left side frame 15.
And a reel right side frame 17.

That is, as shown in FIG. 1, a reel left frame 15 for supporting one end of a spool shaft 19 and a reel right frame 17 for covering the reduction gear mechanism 7 are provided on a frame 21 of the reel body 3. FIGS. 2 and 3
As shown in FIG. 1, a mounting portion 23 for setting the electronic control mechanism housing 11 on the upper front part of the reel body 3 is provided along the spool 1 on the frame 21 on the reel right side frame 17 side. The frame 21 on the right side frame 17 of the reel has an engagement hole 27 with which an engagement claw 25 provided on one side of the electronic control mechanism housing 11 can be engaged.

On the other side of the electronic control mechanism housing 11, a fixing piece 29 is provided which is screwed to the left frame 15 of the reel. When the screw 15 is removed and removed from the frame 21 in the direction of arrow A, the engaging claw 25 engaged with the engaging hole 27 comes off, and the electronic control mechanism housing 11 is integrated with the reel left side frame 15 into the frame. 21 can be removed.

In FIG. 2, reference numerals 31 and 33 denote a transmitting ultrasonic sensor and a receiving ultrasonic sensor which constitute a thread diameter detecting device 35 which will be described later. As shown in FIG. 4, two sensor mounting holes 37 are provided so that these ultrasonic sensors 31 and 33 are located on one plane M ₁ including the axis L of the spool shaft 19.
The ultrasonic sensors 31 and 33 are accommodated in these sensor mounting holes 37, respectively, and the two ultrasonic sensors 31 and 33 are arranged at the upper front part of the reel body 3. I have. And, both ultrasonic sensors 31, 3
As shown in FIGS. 2 and 5, a vibration absorbing material 39 made of a foam material, silicon, or a vibration-proof rubber is wound around the outer periphery of 3 to prevent a short circuit due to mutual interference.

Each of the transmission ultrasonic sensor 31 and the reception ultrasonic sensor 33 has a waterproof structure having a columnar outer shape as shown in FIG. 6, and a piezoelectric ceramic 41 is formed on the piezoelectric ceramic 41 as shown in FIG. A terminal 45 is connected via a lead wire 43. In addition, in FIG. 7, 47 is an acoustic matching layer, 49 is a metal case, 51 is a base, and 53 is a sealing material.

Thus, the transmission ultrasonic sensor 31
As shown in FIG. 4, the fishing line 9 which is wound around the spool 1 functions as a transmitting means for emitting an ultrasonic beam 55 to the surface P of the line diameter, and the receiving ultrasonic sensor 33 is provided with the surface P of the line diameter. It functions as a receiving means for receiving the reflected wave 57 reflected from the, so that the receiving ultrasonic sensor 33 can receive the reflected wave 57 of the ultrasonic beam 55 emitted from the transmitting ultrasonic sensor 31 satisfactorily. Both ultrasonic sensors 31,
Reference numeral 33 is disposed substantially in a V-shape with the surface P of the bobbin diameter.
Then, as shown in FIG. 2, a notch 5 for passing the ultrasonic beam 55 and the reflected wave 57 is provided in the placing portion 23.
9 are formed.

FIG. 8 shows the details of the control mechanism of the fishing reel housed in the electronic control mechanism housing 11.
Numeral 61 denotes a microcomputer which performs a thread length calculation, a thread length display and a data writing control.
1 is a CPU (central processing unit) 63 which controls and manages a program memory, a data memory, a timer, and an input / output device, and executes an arithmetic operation and a transfer process necessary for processing a given job; A ROM 65 for storing a thread length calculation formula and a RAM 67 for storing data such as a calculation result in the CPU 63;
9 and an output interface 71, which are connected to the CPU 63 via the bus 73.

Reference numeral 75 denotes a sensor for detecting the rotation and the direction of the spool 1 and a pair of reed switches 75a, 75a.
5b and a plurality of magnets 75c opposed thereto and fixed to the inner peripheral edge of the spool 1.

A forward / reverse determination signal of the spool 1 obtained by turning the reed switches 75a and 75b on or off by the magnet 75c first is given by
By taking in the CPU 63 through the input interface 69, the built-in up / down counter 77 is set to an up-count or down-count state.

Also, the reed switches 75a and 75b are turned on.
By inputting a rotation pulse of the spool 1 obtained by / OFF to the up / down counter 77 through the input interface 69, the counter is up-counted or down-counted.

Further, the thread diameter detecting device 35 is connected to the input interface 69 via a transmitting circuit 79 and a receiving circuit 81. The output interface 71
Is connected to a digital display 13 for yarn length display via a decoder 83.

As described above, the bobbin diameter detecting device 35 is
A transmission ultrasonic sensor 31 that emits an ultrasonic beam 55 onto the surface P of the spool diameter of the spool 1 and receives a reflected wave 57 that is disposed separately from the transmission ultrasonic sensor 31 and is reflected from the surface P of the spool diameter. And a receiving ultrasonic sensor 33.

FIG. 8 also shows the details of the control means of the bobbin detection device 35. This control means emits an ultrasonic beam 55 from the transmitting ultrasonic sensor 31 to the surface P of the spool diameter of the spool. A receiving circuit 81 for receiving the reflected wave 57 of the ultrasonic beam 55 reflected from the surface P of the bobbin diameter by the receiving ultrasonic sensor 33,
Ultrasonic beam 5 emitted from transmitting ultrasonic sensor 31
The time difference until the ultrasonic sensor 5 is received by the receiving ultrasonic sensor 33 is measured by a timer 84 built in the microcomputer 61.

Then, the time difference Δt and the distance d = (the sound speed 331 [m / s]
ec] × 2) / 1 × Δt, and d is calculated. FIG. 9 shows an example of the transmission circuit 79 and the reception circuit 81.
When entering from 63, the transistor 87 is turned on and a high-voltage pulse signal is applied from the pulse transformer 89 to the transmission ultrasonic sensor 31 by the number of waves of the CPU 63.

The ultrasonic beam 55 is reflected on the surface P of the bobbin diameter to become a reflected wave 57, enters the receiving ultrasonic sensor 33, and induces a receiving wave voltage. The reception wave voltage is received by the reception circuit 81
Through a multi-stage amplification circuit, through a detection transformer 91, and from a detector terminal 93 to a microcomputer 61
Is output to the input interface 69.

On the other hand, the timer 84 starts with a signal for instructing measurement by the CPU 63, and ends the measurement with a signal at the detector terminal 93. Then, the time difference Δt is stored in the RAM 67 and used for calculating the distance d.

FIG. 10 shows an example of the time difference measurement. The transmission voltage waveform 95 is applied to the transmission ultrasonic sensor 31 for a period of 30 μs, for example, once every ス プ ー ル rotation of the spool.
, An ultrasonic beam 55 is emitted.

The reflected wave 57 reflected on the surface P of the bobbin diameter enters the receiving ultrasonic sensor 33, and a voltage is induced. This voltage is amplified by the receiving circuit 81 and output as the receiving pulse 57.

The time difference 150 μs from the rise of the transmission pulse to the rise of the reception pulse is defined as the time difference Δt,
67. That is, as shown in FIG. 8, the distance d from the transmission ultrasonic sensor 31 and the reception ultrasonic sensor 33 to the surface P of the bobbin diameter is represented by d = Δt × (v / 2) where v is the sound velocity. Therefore, the distance d can be obtained by measuring the time Δt.

FIG. 11 shows the relationship between the sensor output voltage appearing at the detector terminal 93 of FIG. 9 and the distance d from the sensor surface to the surface P of the line winding diameter when the reel performs the feeding / winding operation of the fishing line 9. And plotted. The distance d and the sensor output voltage have a linear relationship. Then, the thread diameter D is obtained by the CPU 63, and the thread length is calculated as described later.

As shown in FIG. 8, when the distance between the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33 and the spool shaft 19 of the spool 1 is c, as shown in FIG. cd−d) × 2.

Next, a description will be given of the yarn length measuring operation of the present embodiment configured as described above according to the processing procedure shown in FIG.
When the program of FIG. 12 is started, first, in step S1, it is determined whether or not the fishing line 9 is fed.

Here, when it is determined that the fishing line 9 is paid out, the spool 1 is rotated in the forward direction in accordance with the feeding of the fishing line 9, and a signal in the forward direction is sent from the sensor 75 through the input interface 69. The CPU 63 sets the up / down counter 77 in the up direction, and outputs a pulse signal for each rotation of the spool 1 from the sensor 75 with the rotation of the spool 1 through the input interface 69. 77, and are sequentially counted up (step S2).

In the next step S3, the count content N of the up / down counter 77 is fetched into the CPU 63 for each calculation cycle of the microcomputer 61, and a voltage corresponding to the thread winding diameter D output from the thread winding diameter detecting means 35 is calculated. A-D
The digitally converted data is taken in by the converter, the calculation of L = π · D · N is executed in the next step S4, and the calculation result is output to the digital display 13 through the output interface 71 and the decoder 83, and The payout yarn length L is digitally displayed (step S5).

On the other hand, if it is determined in step S1 that the fishing line 9 is to be wound, the spool 1 is rotated in the reverse direction along with the winding of the fishing line 9, Is input to the CPU 63 through the input interface 69, thereby setting the up / down counter 77 in the down direction. At the same time, the pulse signal output from the sensor 75 with the reverse rotation of the spool 1 is input to the up / down counter 77. Then, a subtraction is performed from the content counted at the time of feeding by the down-counting operation (step S6).

Then, in the next step S7, the count content Na of the up / down counter 77 is taken into the CPU 63 for each calculation cycle of the microcomputer 61, and La =
By executing the calculation of π · D · Na, the winding yarn length, that is, the yarn length L obtained by subtracting the winding yarn length from the fed yarn length.
a is calculated and output to the digital display 13 to digitally display the thread length La (step S8).

Even if the line diameter changes due to the feeding or winding of the fishing line 9, the ultrasonic sensors 31 and 33 are still in the position shown in FIG.
Since located on one plane M ₁ containing the axis L of the spool shaft 19 as ultrasonic transmissions to the change of the yarn diameter, the reception time is possible to perform high accuracy measurement of the corresponding linear .

As described above, the line length measuring device for a fishing reel according to the present embodiment uses the ultrasonic sensors 31 and 3 for measuring the distance.
The use of No. 3 eliminates the need for an optical system such as a lens, so that it is possible to reduce the size of the reel by reducing the size of the sensor unit as compared with the related art.

In this embodiment, the transmitting ultrasonic sensor 3
1 and the receiving ultrasonic sensor 33 are separately arranged, and a high-voltage pulse signal is transmitted to the transmitting ultrasonic sensor 31 owing to the fact that the vibration absorbing member 39 is wound around the ultrasonic sensors 31 and 33. The reverberation of the transmitting ultrasonic sensor 31 also causes the reverberation of the receiving ultrasonic sensor
Does not affect the thread winding diameter surface P of the spool 1.
And when the distance between the ultrasonic sensors 31 and 33 is short,
The distance can be measured with high accuracy regardless of the yarn type.

In addition, even if the line diameter changes due to the feeding or winding of the fishing line 9, the present embodiment provides the two ultrasonic sensors 31,
33 because I is positioned on a plane M ₁ containing the axis L of the spool shaft 19 as shown in FIG. 4, at all times maintain the ultrasonic transmission of the change in the line winding diameter, highly accurate measurement in response reception time is linearly Have the advantages that can be.

Further, according to this embodiment, the spool shaft 1
Since the ultrasonic sensors 31 and 33 can be arranged on the basis of No. 9, positioning of the ultrasonic sensors 31 and 33 is also easy. In addition, in general, fishing reels are often used under severe conditions in which garbage and the like tend to adhere, but in this embodiment,
If dust or the like adheres to the ultrasonic sensors 31 and 33, the electronic control mechanism housing 11 can be removed from the mounting portion 23 to easily remove the dust and the like attached to the sending and receiving portions of the ultrasonic sensors 31 and 33. It has excellent maintenance advantages, such as being able to perform.

FIG. 13 shows a second embodiment of the present invention. In the first embodiment, the ultrasonic sensors 31 and 3 are provided at the bottom of the electronic control mechanism housing 11 set on the front upper portion of the reel body 3.
3, the electronic control mechanism housing 97 may be disposed on the upper portion of the spool 1 and the ultrasonic sensors 31, 33 may be mounted on the bottom thereof as shown in the second embodiment.

Hereinafter, the second embodiment will be described. Since the structure other than the invention is the same as that of the first embodiment, the description thereof is omitted here, and only the invention is explained. Will be described. The same components as those in the first embodiment are denoted by the same reference numerals.

In FIG. 13, reference numeral 99 denotes an electronic control mechanism housing 97.
The mounting portion 99 is provided substantially at the upper center of the reel body 3 along the spool 1. The electronic control mechanism housing 97 is mounted on the mounting portion 99. The electronic control mechanism housing 97 has the same structure as the electronic control mechanism housing 11 and is integrally framed with the left reel frame 15. 21 can be removed.

Also, at the bottom of the electronic control mechanism housing 97,
As shown in FIG. 14, two sensor mounting hole 101 so that these ultrasonic sensors 31, 33 on a plane M ₂ containing the axis L of the spool shaft 19 is located is provided along the spool shaft 19 The ultrasonic sensors 31 and 33 are accommodated in the sensor mounting holes 101, respectively, and the two ultrasonic sensors 31 and 33 are arranged at the upper center of the reel body 3. And the transmission ultrasonic sensor 31
The ultrasonic sensors 31, 33 are arranged in a substantially V-shape with the surface P of the bobbin diameter so that the ultrasonic sensor 33 for reception can receive the reflected wave 57 of the ultrasonic beam 55 emitted from the squeezer satisfactorily. . As shown in FIG. 13, a through hole 103 for allowing the ultrasonic beam 55 and the reflected wave 57 to pass therethrough is formed in the mounting portion 99 so as to face the ultrasonic sensors 31 and 33.

The fishing line length measuring device of the fishing reel according to the present embodiment is configured as described above, and the intended object is achieved by such a line length measuring device as in the first embodiment. It is possible.

FIG. 15 shows a third embodiment of the present invention. In the first and second embodiments, the ultrasonic sensors 31 and 33 are connected to the front and center of the reel body 3 via the electronic control mechanism housings 11 and 97, respectively. The ultrasonic sensors 31 and 33 are attached to the reel unit 1 via the sensor support 105 as described below.
07 may be arranged. In this embodiment,
Since the configuration except for the inventive portion is the same as that of the first embodiment, the description thereof will be omitted, and the inventive portion will be described exclusively. The same components as those in the first embodiment are denoted by the same reference numerals.

In FIGS. 15 and 16, reference numeral 109 denotes a support at the rear of the reel unit, and reference numeral 111 denotes a notch provided at the lower center of the support 109. Ultrasonic sensors 31, 33 are provided in the notch 111. The sensor support 105 is detachably attached with screws 113.

As shown in FIG. 17, a spool shaft 1 is provided on the spool facing surface 111a of the sensor support 111.
The ultrasonic sensors 31 and _{3 are} placed on one plane M3 including the nine axis L.
The two sensor mounting holes 115 are provided along the spool shaft 19 so that the ultrasonic sensors 31 and 33 are located in the sensor mounting holes 115, respectively. Are arranged behind the reel body 3 so as to face the spool 1. or,
Ultrasonic beam 55 emitted from transmitting ultrasonic sensor 31
The ultrasonic sensors 31 and 33 are arranged in a substantially V-shape with the surface P of the bobbin diameter so that the receiving ultrasonic sensor 33 can receive the reflected wave 57 in a good condition. The lead wires 117 of the ultrasonic sensors 31 and 33 are connected to the electronic control mechanism housing 119 via the support pillar 109 and the inside of the reel left frame 15.

Since the present embodiment is configured as described above, the present embodiment also eliminates the need for an optical system such as a lens as in the first embodiment, so that it is possible to reduce the size of the reel. In addition, there is an advantage that high-precision measurement can be always maintained irrespective of the yarn type even if the yarn winding diameter changes.

According to the present embodiment, the ultrasonic sensor 3
When dust or the like adheres to the sensor support
If the 5 is removed from the support 109, the ultrasonic sensors 31, 33
It also has an advantage in terms of maintenance, such as easy removal of dust and the like attached to the sending and receiving sections.

In each of the embodiments described above, the present invention has been described using two ultrasonic sensors, that is, the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33. However, as shown in FIG. The present invention is also applicable to a bobbin diameter measuring means for performing reception with one ultrasonic sensor 121. For example, as shown in FIG. 18, the axis L of the spool shaft 19 is attached to the bottom of the electronic control mechanism housing 11 in FIG. one on the plane M ₁ as the ultrasonic sensor 121 is positioned provided with one of the sensor mounting hole (not shown), the sensor mounting hole on the ultrasonic sensor 121 comprising
And the ultrasonic sensor 121 may be disposed on the upper front part of the reel body 3. With such a structure, the intended purpose can be achieved similarly to the first embodiment.

In each of the above-described embodiments, a pair of reed switches 75a and 75b are disposed opposite to the magnet 75c directly fixed to one side of the spool 1 to detect the number of rotations of the spool 1 and the direction of rotation. Was configured,
Needless to say, the sensor may be configured to detect the rotation of the rotating body that rotates in conjunction with the spool 1 via a known meshing transmission mechanism.

[0057]

As described above, according to the fishing line length measuring device of the fishing reel according to the present invention, an optical system such as a lens as in the prior art is not required, so that the size of the reel can be reduced. This makes it possible to maintain high-accuracy measurement at all times regardless of the yarn type even if the yarn winding diameter changes.

[Brief description of the drawings]

FIG. 1 is a plan view of a fishing reel according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of an electronic control mechanism housing showing an attachment structure of an ultrasonic sensor.

FIG. 3 is a side view of the fishing reel showing an attachment position of an electronic control mechanism housing.

FIG. 4 is a perspective view showing a mounting position of the ultrasonic sensor in the first embodiment.

FIG. 5 is a bottom view of the electronic control mechanism housing showing the mounting structure of the ultrasonic sensor.

FIG. 6 is an overall perspective view of the ultrasonic sensor.

FIG. 7 is a sectional view showing the internal structure of the ultrasonic sensor.

FIG. 8 is an overall configuration diagram of a yarn length measuring device according to an embodiment of the present invention.

FIG. 9 is a transmission / reception circuit diagram of the bobbin diameter detecting device in the present embodiment.

FIG. 10 is an explanatory diagram showing a relationship between transmission and reception of an ultrasonic beam in the present embodiment.

FIG. 11 is a graph showing a relationship between a distance and a time difference.

FIG. 12 is a flowchart showing a procedure of a yarn length measurement display in the embodiment.

FIG. 13 is a bottom view of the electronic control mechanism housing showing the mounting structure of the ultrasonic sensor according to the second embodiment of the present invention.

FIG. 14 is a perspective view showing a mounting position of an ultrasonic sensor in the second embodiment.

FIG. 15 is a plan view of a fishing reel according to a third embodiment of the present invention.

16 is a sectional view of the fishing reel shown in FIG.

FIG. 17 is a perspective view showing a mounting position of an ultrasonic sensor in the third embodiment.

FIG. 18 is a perspective view showing a mounting position of the ultrasonic sensor when one ultrasonic sensor is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spool 3,107 Reel body 9 Fishing line 19 Spool shaft 31 Transmission ultrasonic sensor 33 Receiving ultrasonic sensor 61 Microcomputer 79 Transmission circuit 81 Receiving circuit 105 Sensor support

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuya Nambu 3-14-16 Maezawa, Higashikurume-shi, Tokyo Daiwa Seiko Co., Ltd. (56) References JP-A-3-292842 (JP, A) (58) Surveyed fields (Int. Cl. ⁶ , DB name) A01K 89/00-89/08 G01B 17/00

Claims (1)

(57) [Claims] 1. A reel body, a spool rotatably supported on the reel body via a spool shaft and having a fishing line wound thereon, a sensor for detecting rotation of the spool, and a pulse signal output from the sensor. Up / down counter for counting up and down, transmitting means for emitting an ultrasonic beam to the surface of the spool diameter of the spool, receiving means for receiving a reflected wave reflected from the surface of the spool diameter, and emission from the transmitting means. A thread diameter measuring device comprising: a time measuring means for measuring a time until the received ultrasonic beam is received by the receiving means; and a yarn diameter detecting means for converting the time measured by the time measuring means into an electric signal proportional to the yarn diameter. Means, the thread diameter data from the thread diameter measuring means and the above
A calculating means for calculating the yarn length based on the count value of the down counter; and a display for displaying the yarn length calculated by the calculating means. The transmitting means and the receiving means of the bobbin diameter measuring means comprise a spool. A fishing line length measuring device for a fishing reel attached to a reel body so as to be located on a plane including an axis.