JP3160266B2 - Fishing line length measuring device for fishing reels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a line length measuring device for a fishing reel.

[0002]

2. Description of the Related Art In recent years, a fishing reel has been equipped with a line length measuring device as disclosed in JP-A-60-24447 or JP-A-1-307612 in order to improve fishing results. By measuring the feeding amount and the winding amount of the fishing line with these line length measuring devices, it is possible to feed the device to a desired shelf position.

A line length measuring device disclosed in Japanese Patent Application Laid-Open No. 60-24447 discloses a microcomputer mounted on a reel unit, which relates a line winding amount and a spool diameter with a line diameter of a fishing line as a parameter, a total length of a fishing line, and the like. Data is input in advance by a switch operation on the keyboard, a line length calculation formula corresponding to the line diameter to be used at the time of actual fishing is selected, and based on the actual rotational speed of the spool detected by the rotational speed detecting means and the above data. This yarn length calculation formula is calculated, and the calculation result is displayed on a display as a yarn length.

A yarn length measuring device disclosed in Japanese Patent Application Laid-Open No. 1-307612 detects a position of reflected light of spot light emitted from a light emitting means to a surface of a spool of a spool by a position sensor and determines the diameter of the spool. The electric signal is converted into a proportional electric signal, and the operation means calculates the yarn length based on the yarn winding diameter signal and the number of rotations of the spool detected by the rotation number detecting means, and displays this on a display. .

[0005]

However, Japanese Unexamined Patent Publication No.
In the line length measuring device disclosed in Japanese Patent Application Laid-Open No. 0-24447, it is necessary to input the line diameter data and the total length data of the fishing line wound on the spool each time the used line changes,
The input operation was complicated. In addition, since the line length calculation formula is a quadratic or cubic formula, it takes a long time to calculate the line length with a microcomputer having a low computing ability. In addition, the calculation speed cannot keep up, the yarn length that changes every moment cannot be displayed instantaneously, and if the yarn length calculation formula is simplified, accurate yarn length measurement cannot be performed.

On the other hand, in the line length measuring device disclosed in Japanese Patent Application Laid-Open No. 1-307612, parameters such as the thickness and the total length of the fishing line at the time of measuring the line length are unnecessary compared to the above line length measuring device. As a result, the operability of the reel is improved,
Because the spot light is irradiated on the spool surface of the spool,
It is necessary to focus a light beam output from a light-emitting body such as an LED or a semiconductor laser element on the surface of a spool by an optical system such as a lens, and it is necessary to focus reflected light on a position sensor by another optical system. There was a problem.

That is, when the above-described optical system is used, it is very difficult to reduce the size of the sensor because of the optical system. In addition, since the range of the thread winding diameter that can be measured by one optical system is limited, it is pointed out that the optical system has to be changed according to the size of the reel. The present invention has been devised in view of the above-described circumstances, and is capable of measuring a line length with high accuracy regardless of the type of the line, and furthermore, a line length measuring device for a fishing reel capable of miniaturizing the entire reel. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a fishing reel line length measuring apparatus for detecting a rotation number of a spool rotatably supported on a reel body. Detecting means; bobbin diameter measuring means for obtaining bobbin diameter data based on the time from when the ultrasonic wave emitted from the transmitting ultrasonic sensor to the bobbin surface of the spool is received by the receiving ultrasonic sensor; A yarn length measuring means for obtaining a yarn length based on the yarn winding diameter data obtained by the means and the number of rotations of the spool detected by the rotation number detecting means, and a display for displaying the yarn length obtained by the yarn length measuring means. And a short-circuit preventing means for preventing mutual interference between the transmitting ultrasonic sensor and the receiving ultrasonic sensor.

The invention according to claim 2 is the invention according to claim 1.
4. The fishing reel line length measuring device according to claim 1, wherein the short-circuit preventing means is a vibration absorbing material mounted between the transmitting ultrasonic sensor and the receiving ultrasonic sensor. According to the present invention, in the fishing line length measuring device for a fishing reel according to the first aspect, the short-circuit preventing means is a projection provided between the transmitting ultrasonic sensor and the receiving ultrasonic sensor. It is characterized by:

(Action) According to the invention of each claim, the ultrasonic wave is transmitted from the transmitting ultrasonic sensor to the surface of the spool and the reflected wave is received by the receiving ultrasonic sensor. Based on this, the line winding diameter data of the fishing line wound on the spool is obtained.

Then, the yarn length is obtained by the yarn length measurement means based on the yarn winding diameter data and the number of rotations of the spool detected by the rotation number detection means, and this yarn length is displayed on a display. In measuring the yarn length, the short-circuit preventing means prevents mutual interference between the transmitting ultrasonic sensor and the receiving ultrasonic sensor. According to the second aspect of the present invention, the vibration-absorbing material prevents mutual interference between the transmitting ultrasonic sensor and the receiving ultrasonic sensor, and according to the third aspect of the present invention, The protrusion protruding between the sensor and the receiving ultrasonic sensor prevents mutual interference between the transmitting ultrasonic sensor and the receiving ultrasonic sensor.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 11 show a first embodiment of the invention according to claims 1 and 2. In FIG. 1, reference numeral 1 denotes a spool rotatably supported by a reel body 3, reference numeral 5 denotes a manual handle, The rotational force of the manual handle 5 is transmitted to the spool 1 by the reduction gear mechanism 7,
The feeding and winding of the fishing line 9 are performed.

In the figure, 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 thread length is provided on an operation panel on the surface thereof. The electronic control mechanism housing 11 is detachably mounted between the reel left side frame 15 and the reel right side frame 17. That is, as shown in FIG.
Left frame 15 for pivotally supporting one end of the gear, and reduction gear mechanism 7
The right side frame 17 of the reel covers the frame 21 of the reel body 3.
As shown in FIGS. 2 and 3, a mounting portion 23 for setting the electronic control mechanism housing body 11 on the upper front portion of the reel body 3 is provided on the frame 21 on the right side frame 17 of the reel. The spool 1 is provided to face the fishing line winding surface 1a.

The frame 2 on the reel right side frame 17 side
1 is provided with 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, and the screw of the left frame 15 screwed to the frame 21 is removed. When this is 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 can be removed from the frame 21.

In FIG. 2, reference numerals 31 and 33 designate a transmitting ultrasonic sensor and a receiving ultrasonic sensor which constitute a bobbin diameter detecting device 35, which will be described later. It is housed in two sensor mounting holes 37 provided along the spool shaft 19 at the bottom of the control mechanism housing 11,
It is assembled integrally with the electronic control mechanism housing 11.
As shown in FIGS. 2 to 4, a vibration absorbing material (short-circuit preventing means) 39 made of a foam material, silicon, and a vibration-proof rubber is wound around the outer circumferences of both ultrasonic sensors 31, 33. It has a structure to prevent short circuit.

As shown in FIG. 5, the transmission ultrasonic sensor 31 and the reception ultrasonic sensor 33 have a waterproof structure having a columnar outer shape. As shown in FIG. And the terminal 45 is connected via the. In addition, in FIG.
9 is a metal case, 51 is a base, and 53 is a sealing material.

Thus, the transmission ultrasonic sensor 31 is
As shown in FIG. 7, the ultrasonic sensor 55 functions as a transmitting unit that emits the ultrasonic wave 55 to the spool surface of the spool 1, and the receiving ultrasonic sensor 33 functions as a receiving unit that receives the reflected wave 57 reflected by the spool surface. The transmission ultrasonic sensor 3
The ultrasonic sensors 31 and 33 are arranged in a substantially V-shape with respect to the spool surface of the spool 1 so that the receiving ultrasonic sensor 33 can receive the reflected wave 57 of the ultrasonic wave 55 emitted from the spool 1 satisfactorily. ing. Then, as shown in FIG. 2, a notch 59 for allowing the ultrasonic beam 55 and the reflected wave 57 to pass therethrough is formed in the placing section 23.

FIG. 7 shows the details of the yarn length measuring device according to the present embodiment. In the drawing, reference numeral 61 denotes a microcomputer for performing yarn length calculation, 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.
U63, a ROM 65 for storing a thread length calculation processing program and a thread length calculation formula, a RAM 67 for storing data such as a calculation result in the CPU 63, and an input interface 69
And an output interface 71, which are connected to the CPU 63 via the bus 73.

Reference numeral 75 denotes a sensor (rotation speed detecting means) for detecting the rotation speed and the rotation direction of the spool 1, a pair of reed switches 75a and 75b, and a plurality of reed switches 75a and 75b opposed to the reed switches and fixed to the inner peripheral edge of the spool 1. And the magnet 75c. Then, the reed switches 75a, 75
5b is turned ON / OF by magnet 75c
A forward / reverse rotation determination signal of the spool 1 obtained by the F is taken into the CPU 63 through the input interface 69, so that the built-in up / down counter 77 is set to an up-count or down-count state. .

The O of the reed switches 75a and 75b
By inputting the rotation pulse of the spool 1 obtained by N / OFF to the up / down counter 77 through the input interface 69, the counter is counted up or down. Further, the input interface 69 includes a bobbin diameter detecting device 3.
5 is connected via a transmission circuit 79 and a reception circuit 81, and the output interface 71 is connected to a decoder 83.
A digital display 13 for displaying the yarn length is connected via the.

As shown in FIG. 7, the bobbin diameter detecting device 35 includes a transmitting circuit 79 for emitting the ultrasonic wave 55 from the transmitting ultrasonic sensor 31 to the bobbin surface P of the spool 1 and a reflection at the bobbin surface P. And a receiving circuit 81 for causing the receiving ultrasonic sensor 33 to receive the reflected wave 57 of the transmitted ultrasonic wave 55, and the ultrasonic wave 55 emitted from the transmitting ultrasonic sensor 31 is received by the receiving ultrasonic sensor 33. The time difference Δt is measured by the timer 84.

The time difference Δt and the following equation stored in the ROM 65: distance d from the transmitting and receiving ultrasonic sensors 31 and 33 to the bobbin surface P = (sound speed 331 [m / sec] × 1/2) × Δt (1) From Equation (1), the distance d from the sending and receiving ultrasonic sensors 31 and 33 to the thread winding surface P is calculated.

FIG. 8 shows an example of the transmission circuit 79 and the reception circuit 81. When a signal for instructing measurement is input to the trigger terminal 85 from the CPU 63, the transistor 87 is turned on, and the high voltage is supplied from the pulse transformer 89. The pulse signal is C
The wave number of the PU 63 is applied to the transmission ultrasonic sensor 31. The ultrasonic wave 55 is reflected by the bobbin surface P to become a reflected wave 57, enters the receiving ultrasonic sensor 33, and induces a received wave voltage.

The received wave voltage enters the receiving circuit 81, passes through a plurality of stages of amplification circuits, passes through the detection transformer 91, and is output from the detector terminal 93 to the input interface 69 of the microcomputer 61. On the other hand, the timer 84
The measurement starts with a signal instructing the PU 63 to measure, and ends with a signal at the detector terminal 93. And this time difference Δt
Is stored in the RAM 67 and used for calculating the distance d.

FIG. 9 shows an example of the time difference measurement. For example, a transmission voltage waveform 95 is applied to the transmission ultrasonic sensor 31 for a period of 30 μs once every quarter rotation of the spool, and an ultrasonic wave 55 is applied from the transmission ultrasonic sensor 31 to the spool surface P of the spool 1. Fire. The reflected wave 57 reflected on the wound surface P enters the receiving ultrasonic sensor 33, and a voltage is induced. This voltage is amplified by the reception circuit 81 and output as the reception pulse 57. The time difference 150 μs from the rise of the transmission pulse to the rise of the reception pulse is stored in the RAM 67 as the time difference Δt.

That is, as shown in FIG. 7, the distance d from the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33 to the bobbin surface P is represented by the above formula (1), where the sound velocity is v. Since d = Δt × (v / 2), the distance d can be obtained by measuring the time Δt.

FIG. 10 shows the sensor output voltage appearing at the detector terminal 93 in FIG. 8 and the distance d from the sensor surface to the thread winding surface P when the reel performs the feeding / winding operation of the fishing line 9.
Is measured and plotted, and the distance d and the sensor output voltage have a linear relationship. And the CPU
The thread diameter D is obtained from 63, and the thread length is calculated as described later.

Incidentally, as shown in FIG. 7, 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. −d) × 2. Next, the yarn length measuring operation of the present embodiment configured as described above will be described according to the processing procedure shown in FIG.

When the program shown in FIG. 11 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 normal rotation direction in accordance with the feeding of the fishing line 9, and a signal in the normal rotation direction is taken in from the sensor 75 to the CPU 63 through the input interface 69. As a result, the up / down counter 77 is set in the up direction, and the pulse signal for each rotation of the spool output from the sensor 75 with the rotation of the spool 1 is
The data is taken into the up / down counter 77 through the input interface 69 and is 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 the voltage corresponding to the thread diameter D output from the thread diameter detecting means 35 is calculated. A-D
The data obtained by the conversion by the converter is taken in, 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 as the fishing line 9 is wound. The signal 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, the count value at the time of feeding is subtracted 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 at every calculation cycle of the microcomputer 61, and La =
The calculation of π · D · Na is executed to calculate the winding yarn length, that is, the yarn length La obtained by subtracting the winding yarn length from the fed yarn length, and this is output to the digital display 13 to output the yarn length. La is digitally displayed (step S8).

In this series of yarn length measurement, the vibration-absorbing material 39 prevents a short circuit due to mutual interference between the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33. Thus, the fishing line length measuring device of the fishing reel according to the present embodiment,
Since the ultrasonic sensors 31 and 33 are used for measuring the distance, an optical system such as a lens is not required, so that it is very easy to reduce the size of the sensor unit.

In this embodiment, the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33 are separately arranged, and the vibration absorbing material 39 is wound around the outer periphery of both the ultrasonic sensors 31 and 33. Together with this, when a high-voltage pulse signal is applied to the transmitting ultrasonic sensor 31 and the ultrasonic wave 55 is emitted,
The reverberation of the transmitting ultrasonic sensor 31 is the receiving ultrasonic sensor 3
3 is not affected, so even when the distance between the spool surface of the spool 1 and the ultrasonic sensors 31 and 33 is short, there is no short circuit due to mutual interference, and the distance is measured with high accuracy regardless of the yarn type. As a result, the size of the reel can be reduced, and the present invention can be easily applied to a small-sized reel.

In this embodiment, the ultrasonic sensor 3
1 and 33 are housed in two sensor mounting holes 37 provided at the bottom of the electronic control mechanism housing 11 and the electronic control mechanism housing 1
1 and the electronic control mechanism housing 1
According to the present embodiment, the assembly 1 can be easily detached from the frame 21 of the reel body 3, so that the assembly can be easily disassembled, and maintenance can be performed when seawater or dust adheres to the ultrasonic sensors 31 and 33. It has the advantage of excellent properties.

FIG. 12 shows a second embodiment of the invention according to the first and second aspects. In the first embodiment, the electronic control mechanism housing 11 is set on the upper front part of the reel body 3. As in the embodiment, the electronic control mechanism housing body 97 in which the ultrasonic sensors 31 and 33 are integrally mounted may be arranged above the spool shaft 19. Since the configuration other than the invention is the same as that of the first embodiment, the description thereof will be omitted here, and the invention will be described exclusively. The same components as those in the first embodiment are denoted by the same reference numerals.

That is, in FIG. 12, reference numeral 99 denotes a mounting portion provided on the frame 21 for mounting the electronic control mechanism housing 97. The mounting portion 99 faces the fishing line winding surface 1a of the spool 1. And is provided substantially above the center of the reel body 3.
The electronic control mechanism housing 97 is mounted on the mounting portion 99. The electronic control mechanism housing 97 is integrated with the reel left frame 15 from the frame 21 by the same structure as the electronic control mechanism housing 11 described above. It is removable.

At the bottom of the electronic control mechanism housing 97, two sensor mounting holes 101 are provided on the upper portion of the spool 19 along the spool shaft 19, and an ultrasonic sensor is provided in the sensor mounting hole 101. 31 and 33 are assembled integrally with the electronic control mechanism housing 97. And, as in the first embodiment, a vibration absorbing material 39 is wound around the outer circumferences of both the ultrasonic sensors 31 and 33. In addition, as shown in FIG. 12, a passing 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 each of the ultrasonic sensors 31 and 33.

Since the present embodiment is configured as described above, the intended purpose can be achieved by using such a fishing reel as in the first embodiment. FIG.
Reference numeral 3 denotes a third embodiment of the invention according to claims 1 and 2. In this embodiment, since the configuration excluding the invention portion is the same as that of the first embodiment,
Here, the description of them will be omitted, and only the invention will be described. The same components as those in the first embodiment are denoted by the same reference numerals.

In the first embodiment, the electronic control mechanism housing 11 is detachable from the reel left frame 15 side. In the present embodiment, the electronic control mechanism housing 105 is provided on one side of the electronic control mechanism housing 105 with the upper part of the frame 21. Fixing piece 1 to be fixed by screw
The electronic control mechanism accommodating body 105 is detachable from the frame 21 by fixing the fixing piece 107 to the frame 21 with screws.

At the bottom of the electronic control mechanism housing 105, the same two sensor mounting holes 109 as the electronic control mechanism housing 11 are provided along the spool shaft 19. The ultrasonic sensors 31 and 33 are integrally assembled. Further, in the present embodiment, the vibration absorbing material 39 is not wound around the outer circumference of the ultrasonic sensors 31, 33, and as shown in FIGS.
A mounting hole 111 for a vibration-absorbing material 39 is formed between the holes 33 and filled with a vibration-absorbing material 39 made of a foam material, silicon, and vibration-proof rubber.
A short circuit is prevented by mutual interference of 1, 33.

Thus, even with such a fishing reel,
As in the above embodiments, the ultrasonic sensor 3 is used for distance measurement.
The use of the lenses 1 and 33 eliminates the need for an optical system such as a lens and the like, and makes it easy to reduce the size of the sensor unit. The vibration absorber 39 prevents short circuits due to mutual interference between the ultrasonic sensors 31 and 33. Thus, highly accurate yarn length measurement can be performed regardless of the yarn type.

FIGS. 15 and 16 show claims 1 and 2.
In the figure, reference numeral 113 denotes a support at the rear of the reel body, and the support 113 has a spool 1 side shown in FIG.
As shown in the figure, a concave portion 117 for inserting the sensor mounting portion 115a of the electronic control mechanism housing body 115 incorporating the ultrasonic sensors 31 and 33 is provided along the spool shaft 19, and
At the insertion-side end of the sensor mounting portion 115a, a locking claw 121 that opens to the concave portion 117 and engages with the engaging hole 119 provided on the support column 113 side is provided in the insertion direction of the sensor mounting portion 115a. I have.

In the electronic control mechanism housing 115, the sensor mounting portion 115a is inserted into the concave portion 117 from the right side in FIG. The electronic control mechanism housing 115 is fixed to the support column 113 by engaging them with the engagement holes 119 and screwing them. Also,
The sensor mounting portion 115a is provided with a sensor mounting hole 123 that accommodates two ultrasonic sensors 31, 33 each having a vibration absorbing material 39 wound around the outer periphery thereof, facing the spool 1, and is similar to the first embodiment. In order that the reflected wave 57 of the ultrasonic beam 55 emitted from the transmitting ultrasonic sensor 31 can be properly received by the receiving ultrasonic sensor 33, both ultrasonic sensors 31,
Reference numeral 33 is disposed in a substantially V-shape with the surface of the spool 1 having a thread diameter and is assembled in the sensor mounting hole 123.

Since the present embodiment is configured as described above, according to the present embodiment, since the ultrasonic sensors 31 and 33 are used for measuring the distance, an optical system such as a lens is not required, and the sensor section is downsized. In addition, the vibration absorber 39 prevents short circuits due to mutual interference between the ultrasonic sensors 31 and 33. As a result, highly accurate yarn length measurement can be performed regardless of the yarn type.

In addition, in the present embodiment, the reel right side frame 1
7 is removed from the frame 21, and the sensor mounting portion 115a
The electronic control mechanism housing body 115 can be easily removed in the direction of arrow B by removing the screws between the shaft and the support 113. Therefore, according to the present embodiment, the advantage of good assembling, disassembly, and excellent manufacturing and maintenance can be obtained. Have. The structure of the vibration-absorbing material 39 is not limited to the above-described embodiments, but may be replaced with, for example, the structure shown in FIG. 13 as in the fifth embodiment of claims 1 and 2 shown in FIG. When filling the mounting hole 111 formed between the ultrasonic sensors 31 and 33 with the vibration-absorbing material 39 made of foam material, silicon and vibration-proof rubber, the vibration-absorbing material 39 is spooled from the bottom of the electronic control mechanism housing 105. You may make it protrude to one side.

Further, the vibration absorber 39 is not used and the bottom of the electronic control mechanism housing 105 between the ultrasonic sensors 31 and 33 is provided as in the first embodiment of FIGS. The projection 125 is provided integrally, and the ultrasonic sensor 31,
A short circuit due to water droplets between the protrusions 33 may be prevented, and the protrusions 127 having the same shape as the protrusions 125 may be provided with a water repellent which repels water as in the second embodiment of claim 1 and claim 3 shown in FIG. It may be formed of a material such as silicon or the like, and attached to the bottom of the electronic control mechanism housing 105 between the ultrasonic sensors 31 and 33.

Thus, according to these embodiments, the intended purpose can be achieved similarly to the above embodiments. In each of the above embodiments, the pair of reed switches 75a and 75b are arranged opposite to the magnet 75c directly fixed to one side of the spool 1 to constitute the sensor 75 for detecting the number of rotations of the spool 1 and the direction of rotation. However, the number of rotations of the spool may be detected by detecting the rotation of a rotating body that rotates in conjunction with the spool 1 via a conventionally known mesh transmission mechanism.

[0049]

As described above, according to the yarn length measuring device of each claim, since the ultrasonic sensor is used for measuring the distance, the sensor section can be downsized and the reel can be downsized. In addition, the short-circuit prevention means prevents short-circuiting between the transmitting ultrasonic sensor and the receiving ultrasonic sensor, enabling high-accuracy yarn length measurement regardless of the type of yarn. It was able to demonstrate sufficient practicality.

[Brief description of the drawings]

FIG. 1 is a plan view of a fishing reel equipped with a line length measuring device 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 bottom view of the electronic control mechanism housing showing the mounting structure of the ultrasonic sensor.

FIG. 5 is an overall perspective view of the ultrasonic sensor.

FIG. 6 is a sectional view showing the internal structure of the ultrasonic sensor.

FIG. 7 is an overall configuration diagram of a yarn length measuring device according to an embodiment of the present invention.

FIG. 8 is a transmission / reception circuit diagram of the bobbin diameter detecting device in the present embodiment.

FIG. 9 is an explanatory diagram showing a relationship between transmission and reception of an ultrasonic beam in the present embodiment.

FIG. 10 is a graph showing a relationship between a distance and a time difference.

FIG. 11 is a flowchart illustrating a procedure of a yarn length measurement display according to the embodiment.

FIG. 12 is a cross-sectional view of a fishing reel equipped with a line length measuring device according to the second embodiment of the first and second embodiments.

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

FIG. 14 is a bottom view of the electronic control mechanism housing showing the mounting structure of the vibration absorbing material.

FIG. 15 is a cutaway plan view of a main part of a fishing reel equipped with a line length measuring device according to a fourth embodiment of the present invention.

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

FIG. 17 is a partial cross-sectional view of an electronic control mechanism housing showing a mounting structure of a vibration absorbing material according to the fifth embodiment of the present invention.

FIG. 18 is an enlarged cross-sectional view of a main part of the electronic control mechanism housing according to the first embodiment of the present invention.

FIG. 19 is an enlarged sectional view of a main part of the electronic control mechanism housing according to the second embodiment of the first and third embodiments.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 spool 3 reel body 9 fishing line 11, 97, 105, 115 electronic control mechanism housing 21 frame 31 transmitting ultrasonic sensor 33 receiving ultrasonic sensor 39 vibration absorbing material 55 ultrasonic beam 57 reflected wave 61 microcomputer 75 sensor 79 transmitting Circuit 81 Receiver circuit

──────────────────────────────────────────────────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) JP-A Heisei 3-216136 (JP, A) JP-A-3-63810 (JP, U) JP-A 3-54173 (JP, U) JP-A 4-30866 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A01K 89/015

Claims (3)

(57) [Claims] 1. A rotational speed detecting means for detecting a rotational speed of a spool rotatably supported on a reel body, and an ultrasonic wave emitted from a transmitting ultrasonic sensor to a spool surface of a spool is received by a receiving ultrasonic sensor. A thread diameter measuring means for obtaining thread diameter data on the basis of the time required to obtain the thread length, based on the thread diameter data obtained by the thread diameter measuring means and the number of rotations of the spool detected by the number of rotations detecting means. A thread length measuring means to be determined; a display for displaying the thread length determined by the thread length measuring means; and a short-circuit preventing means for preventing mutual interference between the transmitting ultrasonic sensor and the receiving ultrasonic sensor. A fishing line length measuring device for a fishing reel. 2. The line length measurement of a fishing reel according to claim 1, wherein the short-circuit preventing means is a vibration absorbing member mounted between the transmitting ultrasonic sensor and the receiving ultrasonic sensor. apparatus. 3. The line length measurement of a fishing reel according to claim 1, wherein the short-circuit preventing means is a projection projecting between the transmitting ultrasonic sensor and the receiving ultrasonic sensor. apparatus.