JPH0523084A - Line length measuring device of reel for fishing - Google Patents

Abstract

PURPOSE:To obtain the title device equipped with ultrasonic beam transmitting and receiving means on a plane including a spool shaft, capable of making transmitting and receiving time correspond to change of line wound diameter even in variation of the line wound diameter during unreeling and reeling of fishing line and measuring line length in high accuracy. CONSTITUTION:First, a transmitting means 31 and a receiving means 33 of a line wound diameter measuring means are laid in a plane including a spool shaft 19 and an ultrasonic beam is emitted from the transmitting means 31 to the line wound diameter surface of a spool 1. Successively, the reflected wave thereof is received by the receiving means 33 and a time required for receiving the ultrasonic beam from the transmitting means 31 by the receiving means 33 is determined by a time measuring means. Then the measured time is converted into an electric signal proportional to the line wound diameter by a line wound diameter detecting means. On the other hand, revolution during unreeling or reeling of the spool 1 is detected by a sensor 75, a pulse signal from the sensor 75 is calculated by an up/down counter. Finally line length is computed based on the counted number of revolutions and the line wound diameter signal and the line length is shown by an indicator 13.

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 fishing reels, and more particularly to a line length measuring device capable of highly accurately measuring the amount of reeled-out and wound-up amount of fishing line from the number of rotations of a spool.

[0002]

2. Description of the Related Art In recent fishing reels, the length of reeling / winding length of a fishing line from a spool is measured to accurately lower the tackle on a shelf containing fish, and in fishing, the tackle is not used. It is possible to check the flight distance by checking the point at which the device was thrown in.

As a method for measuring the amount of fishing line delivered and the amount wound, a conventional method is, for example, JP-A-60-244247.
As shown in the publication, data such as a relational expression of the winding amount and the spool winding diameter with the thickness of the thread as a parameter and the total length of the thread are input from a keyboard in a microcomputer incorporated in the reel body, 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, and the count value is loaded into a microcomputer every calculation cycle, and a formula for calculating the yarn length according to the yarn diameter to be used is selected. Then, the yarn length is calculated based on this calculation formula, and the result of the calculation is output to a display device to digitally display the yarn length of the payout or the winding so as to be provided to the fisherman's stool.

However, in the conventional thread length measuring device for fishing reels as described above, the thickness data of the thread and the total length data of the thread wound on the spool are updated by the keyboard each time the thread used changes. The input operation becomes complicated, and the yarn length calculation formula is a quadratic formula or 3 formula.
Since the following formula is used, it takes time for the yarn length calculation in a microcomputer with low computing ability, and when the yarn payout speed is high such as fishing, the yarn length calculation speed cannot catch up with the yarn payout speed. The yarn length that changes momentarily cannot be displayed instantaneously. Further, if the yarn length calculation formula is simplified, there is a problem that accurate yarn length measurement becomes impossible.

Therefore, the present applicant has developed a fishing reel yarn length measuring device which solves such a problem, and disclosed it in Japanese Patent Application No. 63-137764. A fishing reel line length measuring device according to the present application includes a reel body, a spool around which a fishing line rotatably supported by the reel body is wound, a sensor for detecting the rotation of the spool, and the sensor. An up / down counter for counting up and down the pulse signal output from the spool, light emitting means for irradiating the surface of the spool with the diameter of the bobbin, and a position sensor for detecting the position of the reflected light reflected from the surface of the bobbin. And a means for calculating the thread length based on the thread winding diameter data from the thread winding 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.

In this fishing reel thread length measuring device, when the light emitting means irradiates the spool on the surface of the bobbin winding diameter,
The position of the spot reflected light is detected by the position sensor of the bobbin diameter detecting means and can be converted into a signal proportional to the bobbin diameter. Therefore, the bobbin diameter signal and the rotation at the time of winding or winding the thread counted by the up / down counter. If the yarn length is calculated by the calculating means based on the number of revolutions corresponding to the number, the pay-out 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 are unnecessary, and the operability of the reel is improved.

[0007]

However, in such a yarn length measuring apparatus, since the surface of the spool having the winding diameter is irradiated with the spot light, the light beam output from the light emitting body such as the LED or the semiconductor laser element is used. There is a problem that it is necessary to focus the light on the bobbin winding surface by an optical system such as a lens, and it is necessary to focus the reflected light on the position sensor by another optical system.

That is, when the above-mentioned optical system is used, it is very difficult to miniaturize the sensor part because of the optical system, and the range of the bobbin diameter that can be measured by one optical system is very small. However, 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 circumstances, and provides a yarn length measuring device for a fishing reel, which is small and lightweight, and can measure the distance with high accuracy regardless of the yarn type. The purpose is to do.

[0010]

To achieve the above object, the present invention provides a reel unit, a spool rotatably supported by the reel unit via a spool shaft, around which a fishing line is wound, and the spool. Sensor for detecting the rotation of the spool, an up / down counter for counting up and down the pulse signal output from the sensor, transmitting means for emitting an ultrasonic beam to the surface of the spool of the spool, and the surface of the spool of the spool. Receiving means for receiving the reflected wave reflected,
And a time measuring means for measuring the time until the ultrasonic beam emitted from the transmitting means is received by the receiving means, and a bobbin diameter detecting means for converting the time measured by the time measuring means into an electric signal proportional to the bobbin diameter. A bobbin diameter measuring means consisting of
The above-mentioned up / down diameter data from the bobbin diameter measuring means
Comprising 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, and the transmitting means and the receiving means of the above-mentioned yarn winding diameter measuring means are spools. It is characterized in that it is attached to the reel unit so as to be located on a plane including the axis.

[0011]

According to the present invention, the ultrasonic beam is emitted to the bobbin diameter surface of the spool by the transmitting means, the reflected wave is received by the receiving ultrasonic sensor by the receiving means, and is emitted from the transmitting means by the time measuring means. The time until the ultrasonic beam is received by the receiving means is measured. Then, the time measured by the time measuring means is converted into an electric signal proportional to the diameter of the bobbin by the bobbin diameter detecting means, and the number of revolutions at the time of reeling or winding is counted by the bobbin diameter signal and the up / down counter. The yarn length is calculated by the calculating means on the basis of the corresponding number of rotations.

Further, according to the present invention, even if the diameter of the fishing line is changed by feeding or winding the fishing line, the transmitting means and the receiving means are located on the plane including the spool shaft. Therefore, the transmission and reception time of ultrasonic waves is linear, and highly accurate measurement is performed.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 12 show a fishing reel according to a first embodiment of the present invention, in which 1 is a spool rotatably supported by a reel body 3 and 5 is a manual handle. Rotational force generated by a spool drive motor (not shown) arranged in the spool 1 is transmitted to the spool 1 by the reduction gear mechanism 7 mounted in the reel unit 3 so that the fishing line 9 is paid out or wound up. Is becoming

Reference numeral 11 denotes an electronic control mechanism housing for housing the control mechanism of the fishing reel, and a digital display 13 for displaying the thread length is provided on the operation panel thereof. Then, the electronic control mechanism housing 11 includes the reel left frame 15
And the reel right side frame 17 is detachably attached.

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

On the other hand, on the other side of the electronic control mechanism housing 11, there is provided a fixing piece 29 screwed to the reel left frame 15, and although not shown, the reel left frame screwed to the frame 21. When the screw of 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 is removed, and the electronic control mechanism housing 11 is integrated with the left frame 15 of the reel into the frame. It can be removed from 21.

Further, in FIG. 2, reference numerals 31 and 33 denote a transmitting ultrasonic sensor and a receiving ultrasonic sensor which constitute a bobbin diameter detecting device 35, which will be described later, and are provided at the bottom of the electronic control mechanism housing 11. As shown in FIG. 4, two sensor mounting holes 37 are provided so that these ultrasonic sensors 31, 33 are located on a plane M ₁ including the axis L of the spool shaft 19.
The ultrasonic sensors 31 and 33 are housed in the sensor mounting holes 37, respectively, and both ultrasonic sensors 31 and 33 are arranged in the upper front portion of the reel unit 3. There is. And both ultrasonic sensors 31, 3
As shown in FIGS. 2 and 5, a vibration-absorbing material 39 made of foam material, silicon, or vibration-proof rubber is wound around the outer circumference of the wiring 3 to prevent a short circuit due to mutual interference.

Each of the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33 has a waterproof structure having a cylindrical outer shape as shown in FIG. 6, and 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 transmitting ultrasonic sensor 31 is
As shown in FIG. 4, it functions as a transmitting means for emitting the ultrasonic beam 55 to the surface P of the diameter of the fishing line 9 wound around the spool 1, and the ultrasonic sensor 33 for reception has the surface P of the diameter of the fishing line. It functions as a receiving means for receiving the reflected wave 57 reflected from the ultrasonic wave beam 55 emitted from the transmitting ultrasonic sensor 31 so that the receiving ultrasonic sensor 33 can receive the reflected wave 57 satisfactorily. Both ultrasonic sensors 31,
33 is arranged in a substantially V shape with the surface P of the bobbin diameter.
Then, as shown in FIG. 2, the notch 5 for allowing the ultrasonic beam 55 and the reflected wave 57 to pass therethrough is provided in the mounting portion 23.
9 is formed.

FIG. 8 shows the details of the control mechanism of the fishing reel housed in the electronic control mechanism housing 11, and in the figure,
Reference numeral 61 is a microcomputer for calculating the yarn length, displaying the yarn length, and controlling the writing of data.
Reference numeral 1 denotes a CPU (central processing unit) 63 for controlling and managing a program memory, a data memory, a timer, and an input / output device to execute necessary calculations and transfer processes for processing a given job, and a yarn length calculation processing program. And a ROM 67 for storing a yarn length calculation formula, a RAM 67 for storing data such as a calculation result in the CPU 63, and an input interface 6
9 and an output interface 71, which are connected to the CPU 63 via a bus 73.

A sensor 75 detects the rotation of the spool 1 and its direction, and is a pair of reed switches 75a and 7a.
5b, and a plurality of magnets 75c that are fixed to the inner peripheral edge of the spool 1 so as to face it.

Then, a forward / reverse rotation determination signal of the spool 1 obtained by turning the reed switches 75a and 75b ON / OFF by the magnet 75c first,
By taking in the CPU 63 through the input interface 69, the built-in up / down counter 77 is set to the up-counting or down-counting state.

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

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

As described above, the bobbin diameter detecting device 35 is
An ultrasonic sensor 31 for transmitting which emits an ultrasonic beam 55 to the surface P of the spool diameter of the spool 1, and a reflected wave 57 which is arranged separately from the ultrasonic sensor 31 for transmission and is reflected from the surface P of the spool diameter. The reception ultrasonic sensor 33 is provided.

FIG. 8 also shows the details of the control means of the spool detection device 35, which emits the ultrasonic beam 55 from the transmitting ultrasonic sensor 31 to the surface P of the spool 1 having the spool diameter. And a receiving circuit 81 for receiving the reflected wave 57 of the ultrasonic beam 55 reflected from the surface P of the bobbin diameter with the receiving ultrasonic sensor 33.
Ultrasonic beam 5 emitted from transmitting ultrasonic sensor 31
The time difference until 5 is received by the receiving ultrasonic sensor 33 is configured to be measured by the timer 84 built in the microcomputer 61.

The time difference Δt and the distance to the bobbin surface stored in the ROM 65 d = (sonic velocity 331 [m / s
ec] × 2) / 1 × Δt, d is calculated. FIG. 9 shows an example of the transmitting circuit 79 and the receiving circuit 81, in which the signal for instructing measurement to the drigger terminal 85 is the CPU.
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 transmitting ultrasonic sensor 31 by the wave number of the CPU 63.

The ultrasonic beam 55 is reflected by the surface P having the diameter of the bobbin to form a reflected wave 57, which enters the ultrasonic sensor for reception 33 and induces a received wave voltage. The received wave voltage is the receiving circuit 81
, A multi-stage widening circuit, a detection transformer 91, a detector terminal 93, and a microcomputer 61.
Is output to the input interface 69.

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

FIG. 10 shows an example of time difference measurement. For example, a voltage waveform 95 of transmission is applied to the transmission ultrasonic sensor 31 for a time period of 30 μs per spool 1/4 rotation, and the surface P of the spool diameter of the spool 1 is transmitted from the transmission ultrasonic sensor 31.
The ultrasonic beam 55 is emitted to.

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

The time difference from the rising edge of the transmission pulse to the rising edge of the reception pulse of 150 μs is defined as the time difference Δt.
It is stored in 67. That is, as shown in FIG. 8, the distance d from the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33 to the surface P of the bobbin diameter is d = Δt × (v / 2), where v is the speed of sound. Therefore, it is possible to obtain the distance d by measuring the time Δt.

FIG. 11 shows an actual measurement of the relationship between the sensor output voltage appearing at the detector terminal 93 in FIG. 9 and the distance d from the sensor surface to the surface P of the bobbin diameter when the reel feeds / winds 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, the bobbin diameter D is D = (where c is the distance between the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33 and the spool shaft 19 of the spool 1). It can be easily calculated with cd−x2.

Next, the yarn length measuring operation of this embodiment constructed as described above will be described according to the processing procedure shown in FIG.
When the program of FIG. 12 starts, first, in step S1, it is determined whether or not the fishing line 9 has been fed.

Here, when it is determined that the fishing line 9 has been fed, the spool 1 is rotated in the normal rotation direction in accordance with the feeding of the fishing line 9, so that a signal in the normal rotation direction is sent from the sensor 75 through the input interface 69. The up / down counter 77 is set in the up direction by being taken in by the CPU 63, and the pulse signal for each one revolution of the spool output from the sensor 75 along with the rotation of the spool 1 is passed through the input interface 69 to the up / down counter. It is taken in by 77 and 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 at each calculation cycle of the microcomputer 61, and the voltage corresponding to the thread winding diameter D output from the thread winding diameter detecting means 35 is further changed. A-D
The converter digitally converts the data into data, executes the calculation of L = π · D · N in the next step S4, and outputs the calculation result to the digital display 13 through the output interface 71 and the decoder 83. The fed-out yarn length L is digitally displayed (step S5).

On the other hand, if it is determined in step S1 that the fishing line 9 has been wound, the spool 1 is rotated in the reverse direction as the fishing line 9 is wound. Is input to the CPU 63 through the input interface 69, thereby setting the up / down counter 77 in the down direction, and at the same time, the pulse signal output from the sensor 75 due to the reverse rotation of the spool 1 is input to the up / down counter 77. Then, the down-count operation subtracts from the contents counted at the time of feeding (step S6).

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

Further, even if the diameter of the fishing line is changed by feeding or winding the fishing line 9, both ultrasonic sensors 31 and 33 are arranged as shown in FIG.
As described above, since it is located on one plane M ₁ including the axis L of the spool shaft 19, the ultrasonic wave transmission / reception time linearly corresponds to the change in the diameter of the bobbin and highly accurate measurement is performed. ..

As described above, the yarn length measuring device for a fishing reel according to this embodiment uses the ultrasonic sensors 31, 3 to measure the distance.
Since No. 3 is used, an optical system such as a lens is not necessary, and therefore, the size of the reel can be reduced by reducing the size of the sensor unit as compared with the conventional case.

Moreover, in this embodiment, the transmitting ultrasonic sensor 3 is used.
1 and the ultrasonic sensor for reception 33 are separately arranged, and the high-pressure pulse signal is transmitted to the ultrasonic sensor for transmission 31 in combination with the fact that the vibration absorbing material 39 is wound around the outer circumferences of the ultrasonic sensors 31, 33. Even when the ultrasonic wave 55 is applied and the ultrasonic beam 55 is emitted, the reverberation of the ultrasonic sensor 31 for transmission is reflected by the ultrasonic sensor 33 for reception.
Since it does not affect the thread winding diameter surface P of the spool 1.
And the distance between the ultrasonic sensors 31 and 33 is short,
It is possible to measure the distance with high accuracy regardless of the yarn type.

In addition, even if the diameter of the fishing line is changed by feeding or winding the fishing line 9, the ultrasonic sensor 31,
Since 33 is positioned on one plane M ₁ including the shaft center L of the spool shaft 19 as shown in FIG. 4, the ultrasonic wave transmission / reception time linearly corresponds to the change in the diameter of the bobbin, and high-precision measurement is always maintained. It has the advantage that it can.

Furthermore, according to the present embodiment, the spool shaft 1
Since the ultrasonic sensors 31 and 33 can be arranged based on 9, the positioning of the ultrasonic sensors 31 and 33 is easy. In addition, in general, the fishing reel is often used under severe conditions where dust or the like is likely to adhere, but in the present embodiment,
When 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 an advantage in terms of maintenance as well.

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

The second embodiment will be described below. However, since the configuration excluding the invented portion is the same as that of the first embodiment, the description thereof will be omitted here and only the invented portion will be described. Will be described. The same parts as those in the first embodiment are indicated by the same reference numerals.

In FIG. 13, 99 is an electronic control mechanism housing 97.
Is a mounting portion for mounting the mounting portion 99. The mounting portion 99 is provided along the spool 1 at a substantially central upper portion of the reel unit 3. 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 reel left side frame 15. It is removable from 21.

Further, at the bottom of the electronic control mechanism housing 97,
As shown in FIG. 14, two sensor mounting holes 101 are provided along the spool shaft 19 so that the ultrasonic sensors 31 and 33 are located on a plane M ₂ including the axis L of the spool shaft 19. The ultrasonic sensors 31 and 33 are housed in the sensor mounting holes 101, respectively, and both ultrasonic sensors 31 and 33 are arranged in the central upper portion of the reel unit 3. Then, the ultrasonic sensor for transmission 31
Both 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 favorably receive the reflected wave 57 of the ultrasonic beam 55 emitted from. .. Further, as shown in FIG. 13, a passage hole 103 for passing the ultrasonic beam 55 and the reflected wave 57 is formed in the placing portion 99 so as to face the ultrasonic sensors 31 and 33.

The fishing reel yarn length measuring device according to the present embodiment is constructed in this manner, and the yarn length measuring device also achieves the intended purpose 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 mounted in front of the reel unit 3 and in the upper center part thereof via the electronic control mechanism housings 11 and 97. However, the ultrasonic sensors 31 and 33 are attached to the reel unit 1 via the sensor support 105 as described below.
It may be placed behind 07. Incidentally, also in this embodiment,
Since the configuration excluding the invented portion is the same as that of the first embodiment, description thereof will be omitted and only the invented portion will be described. The same parts as those in the first embodiment are indicated by the same reference numerals.

In FIG. 15 and FIG. 16, 109 is a post at the rear of the reel body, 111 is a notch provided in the center of the lower part of the post 109, and ultrasonic sensors 31, 33 are provided in the notch 111. The sensor support 105 is detachably attached with screws 113.

On the spool facing surface 111a of the sensor support 111, as shown in FIG.
The ultrasonic sensors 31 and ₃ are arranged on one plane M ₃ including the axis L of 9
Two sensor mounting holes 115 are provided along the spool shaft 19 so that 3 is located, and the ultrasonic sensors 31, 33 are housed in these sensor mounting holes 115, respectively. Is arranged behind the reel unit 3 so as to face the spool 1. or,
Ultrasonic beam 55 emitted from transmitting ultrasonic sensor 31
In order that the reception ultrasonic sensor 33 can satisfactorily receive the reflected wave 57, the both ultrasonic sensors 31 and 33 are arranged in a substantially V shape with the surface P of the bobbin diameter. The lead wires 117 of the ultrasonic sensors 31 and 33 are connected to the electronic control mechanism housing 119 via the support column 109 and the reel left frame 15.

Since this embodiment is constructed in this way, the present embodiment does not require an optical system such as a lens as in the first embodiment, so that the reel can be downsized. In addition, there is an advantage that high-precision measurement can always be maintained regardless of the yarn type even when the diameter of the wound yarn changes.

Further, according to this embodiment, the ultrasonic sensor 3
When dust or the like adheres to the 1, 33, the sensor support 10
5 is removed from the support 109, ultrasonic sensors 31, 33
It also has an advantage in terms of maintenance, such as easy removal of dust and the like adhering to the receiver and receiver.

In each of the above embodiments, the present invention has been described with the use of two ultrasonic sensors, the transmitting ultrasonic sensor 31 and the receiving ultrasonic sensor 33. However, as shown in FIG. , Which can also be applied to a bobbin diameter measuring means for receiving with one ultrasonic sensor 121. For example, the shaft center L of the spool shaft 19 as shown in FIG. 18 is provided at the bottom of the electronic control mechanism housing 11 of FIG. One sensor mounting hole (not shown) is provided so that the ultrasonic sensor 121 is located on the one plane M ₁ including the ultrasonic sensor 121.
Alternatively, the ultrasonic sensor 121 may be disposed in the upper front portion of the reel unit 3 with such a structure. With such a structure, the intended purpose can be achieved as in the first embodiment.

Further, in each of the above embodiments, the pair of reed switches 75a and 75b are arranged so as to face the magnet 75c directly fixed to one side of the spool 1, and the sensor 75 for detecting the rotation speed and the rotation direction of the spool 1 is arranged. Was constructed,
It goes without saying that the sensor may be configured to detect the rotation of the rotating body that rotates in conjunction with the spool 1 via a known mesh transmission mechanism.

[0057]

As described above, according to the fishing reel yarn length measuring apparatus of the present invention, the conventional optical system such as a lens is not required, so that the reel can be downsized. In addition to being possible, it has the effect that even if the diameter of the bobbin changes, high-precision measurement can always be maintained regardless of the yarn type.

[Brief description of 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 container showing an ultrasonic sensor mounting structure.

FIG. 3 is a side view of the fishing reel showing the mounting position of the electronic control mechanism container.

FIG. 4 is a perspective view showing a mounting position of an 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 an ultrasonic sensor.

FIG. 7 is a cross-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 detection device according to the present embodiment.

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

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

FIG. 12 is a flow chart showing the procedure of yarn length measurement display in this embodiment.

FIG. 13 is a bottom view of the electronic control mechanism container 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 cross-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 the mounting position of the ultrasonic sensor when one ultrasonic sensor is used.

[Explanation of symbols]

 1 Spool 3,107 Reel Main Body 9 Fishing Line 19 Spool Axis 31 Ultrasonic Sensor for Transmission 33 Ultrasonic Sensor for Reception 61 Microcomputer 79 Transmission Circuit 81 Reception Circuit 105 Sensor Support

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuya Nanbu 3-14-16 Maesawa, Higashi Kurume-shi, Tokyo Daiwa Seiko Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A reel body, a spool around which a fishing line is rotatably supported by a reel shaft and which is rotatably supported by the reel body, a sensor for detecting rotation of the spool, and a sensor for detecting the rotation of the spool. An up / down counter for counting up and down the pulse signal outputted from the transmitting means, a transmitting means for emitting an ultrasonic beam to the surface of the bobbin diameter of the spool, and a receiving means for receiving a reflected wave reflected from the surface of the bobbin diameter. And a time measuring means for measuring the time until the ultrasonic beam emitted from the transmitting means is received by the receiving means, and a bobbin diameter detecting means for converting the time measured by the time measuring means into an electric signal proportional to the bobbin diameter. And a thread winding diameter data from the thread winding diameter measuring means
Comprising 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 this calculating means. A yarn length measuring device for a fishing reel, which is attached to a reel body so as to be located on a plane including a shaft.