KR101592151B1 - A racket of which tension can be adjusted - Google Patents

A racket of which tension can be adjusted Download PDF

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Publication number
KR101592151B1
KR101592151B1 KR1020150145031A KR20150145031A KR101592151B1 KR 101592151 B1 KR101592151 B1 KR 101592151B1 KR 1020150145031 A KR1020150145031 A KR 1020150145031A KR 20150145031 A KR20150145031 A KR 20150145031A KR 101592151 B1 KR101592151 B1 KR 101592151B1
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KR
South Korea
Prior art keywords
tension
unit
racket
switch
string
Prior art date
Application number
KR1020150145031A
Other languages
Korean (ko)
Inventor
이선규
Original Assignee
이선규
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Publication date
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Priority to KR1020150145031A priority Critical patent/KR101592151B1/en
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Publication of KR101592151B1 publication Critical patent/KR101592151B1/en

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/08—Frames with special construction of the handle
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/005—Devices for measuring the tension of strings
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/12—Devices arranged in or on the racket for adjusting the tension of the strings
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/22—Adjustable handles

Abstract

The present invention relates to a racket 1 capable of displaying the tension of the string 10 via the tension sensor 51 and the display unit 60 and adjusting the tension of the string 10 through the tension adjuster 53. [ Furthermore, it is possible to reduce the energy used to display the tension of the string 10 by including the charging unit 80 that converts and stores the vibration due to the impact of the racquet 1 into electric energy. And has a feature that the tension value detected by the tension sensor 51 through the motor 103 and the control controller 105 can be feedback-controlled to the user's set tension value.

Description

[0001] The present invention relates to a racket capable of adjusting tension,

The present invention relates to a racket capable of displaying and adjusting a tension of a string. More specifically, the present invention can display a tension of a string through a tension sensor and a display unit, and adjust a tension of the string through a tension adjuster. And more particularly, to a racket including a motor and a control controller capable of converting and storing vibration due to the impact of a racket through a live part into electrical energy and feedback-controlling the detected tension value to a user's set tension value.

Rackets that control the tension of a common string are known. However, there is a known problem that the tension control racket can not accurately know the string tension value by adjusting the tension of the racket due to the intuition of the user. Further, in order to precisely control the tension value of the racquet, a separate string machine must be used.

The object of the present invention is to provide a racket capable of adjusting the tension of a string by a tension adjuster and detecting the adjusted tension value by a tension sensor and displaying the adjusted tension value in real time on a display unit. have.

It is another object of the present invention to provide a racket including a charger for converting and storing vibrations caused by hitting of the racket into electric energy.

It is another object of the present invention to provide a racket including a motor and a control controller for automatically driving a tension adjusting unit so that a tension value of a string detected by a tension sensor is a set tension value of a user.

The racket includes a string, a head frame to which the string is attached, a knob having a step formed at a lower end thereof, and a connecting portion connecting the head frame and the knob to solve the above-mentioned problem. And a power supply unit, wherein a head frame hole is formed in the head frame, a knob hole is formed in the knob, and the tension adjusting means is connected to one end of the string passing through the head frame hole and the knob hole A tension sensor for detecting the tension of the string; a cylindrical coupling portion in which the tension sensor is fastened at one end and the male screw portion is formed at the outer periphery of the other end; and a female screw portion is formed at the inner periphery of the one end, And a tension adjusting portion formed on the end portion so as to be rotatable with the step, Wherein the power supply unit includes means for supplying power to the tension sensor and the display unit and includes a chargeable battery and a charge terminal for applying external power for charging the battery The racquet being capable of adjusting the tension.

The racket capable of adjusting the tension may further include a tension adjusting groove which can manually adjust the tension of the string on the outside of the other end of the tension adjuster.

The racquet capable of adjusting the tension further includes a charging unit and a switch unit. The charging unit includes a charger housing in the form of a non-magnetic material and having a rectangular tube shape. The charging unit is coupled to the inside of the charger housing in a direction parallel to the plane of the head frame, A rod-like permanent magnet fastened to the fastening hole in a direction perpendicular to the plane of the head frame; and a plurality of permanent magnets arranged on the outer circumference of the charger housing in a shape surrounding the rod- A DC-DC converter connected to an output terminal of the rectifying unit; and a battery connected to an output terminal of the DC-DC converter, wherein the switch unit is connected to the battery, A first switch unit disposed between the tension sensor and the display unit for on / off controlling power supply; A second switch unit disposed between the sensor and the display unit for controlling on / off of power supply; a power detection sensor for checking whether the power of the battery is sufficient; The first switch is turned off and the second switch is turned on, and when the power of the battery is insufficient, the first switch is turned on and the second switch is turned off.

The tack adjustable racket further includes a tension automatic control unit, wherein the tension automatic control unit includes an input unit for receiving a set tension value of a user, a memory unit for storing a set tension value input from the input unit, And a control controller for feedback-controlling the motor driving unit such that a tension value detected by the tension sensor and a preset tension value stored in the memory unit are equal to each other, have

The control controller of the tension adjustable racket may be an integrator comprising a resistor, a capacitor and an operational amplifier.

According to the above configuration, the present invention has the effect of providing a racket that allows the user to adjust the tension of the string to a desired value in real time.

In addition, the present invention has an effect of providing a racket for reducing energy for driving a tension sensor and a display unit by converting vibration due to the impact of the racket into electric energy.

The present invention also has the effect of providing a racket for automatically adjusting the tension of a string with a user's set tension value.

1 shows a racquet of the present invention
2 is a view of the racquet handle of the present invention viewed from the bottom to the top
3 is a view showing the inside of the handle of the racquet of the present invention
4 is a view showing a configuration for converting the vibration of a racket of a live part of the present invention into electric energy
5 is a view showing a configuration for storing converted electric energy of a live part of the present invention as a DC voltage
6 is a view showing the internal structure of the tension automatic control unit of the present invention
7 is a view for explaining a process in which the tension of the present invention is automatically controlled

Hereinafter, the racket 1 capable of adjusting the tension will be described in detail with reference to FIGS. 1 to 7. FIG.

(First Embodiment) The racket 1 capable of manually adjusting the tension in Figs. 1, 2 and 3 will be described.

The racket 1 capable of adjusting tension can be used as a racket 1 having a string 10, a head frame 20 to which the string 10 is attached, a handle 30 having a step 33 at a lower end thereof, (30).

The racket 1 capable of adjusting the tension further includes a tension adjusting means 50, a display unit 60, and a power source unit 70.

A head frame hole 21 is formed in the head frame 20 and a handle hole 31 is formed in the handle 30.

The tension adjusting means 50 includes a tension sensor 51 connected to one end of the string 10 passing through the head frame hole 21 and the knob hole 31 to detect the tension of the string 10, A cylindrical engagement portion 52 having the tension sensor 51 fastened at one end thereof and a male screw portion 52a formed at the outer circumferential edge of the other end thereof and a cylindrical engagement portion 52 having the male screw portion 52a coupled to the inner circumferential edge of the one end portion And a tension adjusting part 53 formed with a female screw part 53a and a protruding step 53b at the other end so as to be rotatably coupled with the step 33. [

The display unit 60 displays the tension sensed by the tension sensor 51.

The power supply unit 70 is a means for supplying power to the tension sensor 51 and the display unit 60. The power supply unit 70 includes a rechargeable battery 71 and a charging terminal 72 for applying external power for charging the battery 71. [ (72).

Further, the tension adjusting unit 53 further includes a tension adjusting groove 53c which can manually adjust the tension of the string 10 on the outside of the other end.

The one end and the other end of the coupling part 52 are coupled by the spherical projection 52c and the spherical groove 52d so that even if the female threaded part 53a formed on the other end of the coupling part 52 rotates, I never do that. A protrusion 52b is formed on the outer periphery of one end of the fastening portion 52 and a slit 32 is formed in the inside of the handle 30. The protrusion 52b is engaged with the slit 32, It is possible to guide the linear movement of the fastening portion 52 and thereby prevent the string 10 from being twisted.

By the combination of these structures, when the tension adjusting part 53 is rotated, the tension sensor 51 is moved and the string is pulled or pushed, so that the tension of the string can be manually adjusted as desired by the user.

In addition, since the manually adjusted tension value is detected by the tension sensor 51 and displayed on the display unit 60 in real time, the user can know the tension value manually adjusted in real time.

(Second Embodiment) Figs. 4 and 5 illustrate a racket for reducing energy for driving vibrations of a tension sensor and a display unit by converting vibrations caused by hitting of a racket into electric energy.

The tension-adjustable racket 1 of the first embodiment further includes a charging section 80 and a switch section 90.

The charging part 80 is composed of a charging part housing 81 which is a non-magnetic material and has a rectangular tube shape. The charging part 80 is coupled to the inside of the charging part housing 81 in a direction parallel to the plane of the head frame 20, A rod-shaped permanent magnet 83 fastened to the fastening hole 82a in a direction perpendicular to the plane of the head frame 20; and a rod-shaped permanent magnet 83 And a rectifying part 87 connected to both ends of the coil 84. The rectifying part 87 is connected to the output terminal of the rectifying part 87. The rectifying part 87 is connected to both ends of the coil 84, And a battery 89 connected to an output terminal of the DC-DC converter 88. The DC-

The switch unit 90 includes a first switch unit disposed between the battery 71, the tension sensor 51 and the display unit 60 to turn on / off the power supply, A second switch unit disposed between the tension sensor 51 and the display unit 60 for controlling on / off of power supply; a power detection sensor for checking whether the power of the battery 59 is sufficient; The first switch is turned off and the second switch is turned on when the power of the battery is sufficient according to the value detected by the detection sensor. When the power of the battery is insufficient, the first switch is turned on and the second switch is turned off And a switch control section.

According to Faraday's law, when the permanent magnet 83 inside the fixed coil 84 is moved, the magnetic field B of the permanent magnet 83 also varies, and the coil 84 is subjected to such a magnetic field B A current in a direction for suppressing the fluctuation of the voltage is generated. It can be rectified through a rectifying part 87 formed by a circuit (a full-wave rectifying circuit) connecting a capacitor to a bridge diode or a circuit (a half-wave rectifying circuit) connecting a capacitor to a diode or the like. The DC-DC converter 88 may be an inductor-type boost converter or an inductorless-type charge pump converter, which is a step-up type. The capacitor 89 may be a conventional capacitor.

The charging part housing 81 and the plate spring 82 are coupled to each other by a fixing part 86 including a bracket 85 and a bolt 86a and a nut 86b. At this time, the width of the plate spring 82 can be adjusted by adjusting the length of the 'A' -shaped bracket 85, and as a result, the displacement of the permanent magnet 83 can be appropriately adjusted.

The vibration of the racket is converted into electric energy and stored in the battery 89. By driving the tension sensor 51 and the display unit 60 with the stored energy, The energy saving effect of increasing the charging time interval of the battery 71 is obtained.

(Third Embodiment) [0042] In Figs. 6 and 7, a racket for automatically adjusting the tension of a string with a set tension value of a user will be described.

The racket 1 capable of adjusting the tension in the first embodiment further includes a tension automatic control unit 100. [

The tension automatic control unit 100 includes an input unit 101 for receiving a user's set tension value, a memory unit 102 for storing a set tension value input from the input unit 101, a DC A motor driving unit 104 for driving the DC motor unit 103 and a control unit for controlling the motor driving unit 104 such that the tension value detected by the tension sensor 51 is equal to a preset tension value stored in the memory unit, And a control controller 105 for feedback-controlling the motor 104.

The control controller 105 may be an integrator including a resistor R, a capacitor C, and an operational amplifier Op.Amp.

7 shows a process of driving the tension value detected by the tension sensor 51 by the negative feedback control in the same manner as the tension value set by the user through the input unit 101. [ Specifically, the error between the tension value detected by the tension sensor and the tension value set by the user is integrated by the integrator, and the DC motor unit 103 is driven via the motor driving unit 104 with the integrated voltage value Vctrl. And the tension adjusting unit 53 is rotated to move the tension sensor 51 to adjust the tension of the string 10. [

By combining these configurations, the negative feedback control is performed in which the integral voltage value Vctrl is automatically determined so that the tension value difference becomes zero.

1: Adjustable racket
10: string 20: head frame
30: handle 40: connection
50: tension adjusting means 60:
70: power supply unit 80:
90: switch unit 100: tension automatic control unit

Claims (5)

A handle 30 having a step 33 at a lower end thereof; a connecting portion 40 connecting the head frame 20 and the handle 30; , The racket (1) comprising:
The racket 1 further includes a tension adjusting means 50, a display portion 60, and a power source portion 70,
A head frame hole 21 is formed in the head frame 20, a handle hole 31 is formed in the handle 30,
The tension adjusting means 50 includes a tension sensor 51 connected to one end of the string 10 passing through the head frame hole 21 and the knob hole 31 to detect the tension of the string 10, A cylindrical engagement portion 52 having the tension sensor 51 fastened at one end thereof and a male screw portion 52a formed at the outer circumferential edge of the other end thereof and a cylindrical engagement portion 52 having the male screw portion 52a coupled to the inner circumferential edge of the one end portion And a tension adjusting part 53 having a female screw part 53a and a protruding step 53b at the other end so as to be rotatably engaged with the step 33,
The display unit 60 displays the tension sensed by the tension sensor 51,
The power supply unit 70 is a means for supplying power to the tension sensor 51 and the display unit 60. The power supply unit 70 includes a rechargeable battery 71 and a charging terminal 72 for applying external power for charging the battery 71. [ (72)
The racket further includes an automatic tension controller (100)
The tension automatic control unit 100 includes an input unit 101 for receiving a user's set tension value, a memory unit 102 for storing a set tension value input from the input unit 101, a DC A motor driving unit 104 for driving the DC motor unit 103 and a control unit for controlling the motor driving unit 104 so that the tension value detected by the tension sensor 51 is equal to the preset tension value stored in the memory unit, And a control controller (105) for feedback-controlling the tachometer (104). The tension adjustable racket (1) The method according to claim 1,
And a tension adjusting groove (53c) capable of manually adjusting a tension of the string (10) at the outer side of the other end of the tension adjusting part (53) The racquet according to claim 1, wherein the racket (1) further comprises a charging part (80) and a switch part (90)
The charging part 80 is composed of a charging part housing 81 which is a non-magnetic material and has a rectangular tube shape. The charging part 80 is coupled to the inside of the charging part housing 81 in a direction parallel to the plane of the head frame 20, A rod-shaped permanent magnet 83 fastened to the fastening hole 82a in a direction perpendicular to the plane of the head frame 20; and a rod-shaped permanent magnet 83 And a rectifying part 87 connected to both ends of the coil 84. The rectifying part 87 is connected to the output terminal of the rectifying part 87. The rectifying part 87 is connected to both ends of the coil 84, And a capacitor 89 connected to an output terminal of the DC-DC converter 88. The DC-
The switch unit 90 includes a first switch unit disposed between the battery 71, the tension sensor 51 and the display unit 60 to turn on / off the power supply, A second switch unit disposed between the tension sensor 51 and the display unit 60 to turn on / off the power supply; a power detection sensor for checking whether the power of the battery 89 is sufficient; The first switch is turned off and the second switch is turned on when the power of the battery is sufficient according to the value detected by the detection sensor. When the power of the battery is insufficient, the first switch is turned on and the second switch is turned off A racket (1) capable of adjusting the tension, characterized by comprising a switch control part 4. The method according to any one of claims 1 to 3,
Wherein the one end and the other end of the coupling portion 52 are coupled with the spherical protrusion 52c and the spherical groove 52d to prevent the string 10 from being twisted. 4. The method according to any one of claims 1 to 3,
Characterized in that the control controller (105) is an integrator including a resistor (R), a capacitor (C) and an operational amplifier (Op.Amp)
KR1020150145031A 2015-10-18 2015-10-18 A racket of which tension can be adjusted KR101592151B1 (en)

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KR1020150145031A KR101592151B1 (en) 2015-10-18 2015-10-18 A racket of which tension can be adjusted

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Application Number Priority Date Filing Date Title
KR1020150145031A KR101592151B1 (en) 2015-10-18 2015-10-18 A racket of which tension can be adjusted

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KR101592151B1 true KR101592151B1 (en) 2016-02-05

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111569382A (en) * 2020-05-21 2020-08-25 三峡大学 Badminton racket capable of adjusting beat line pound and stay wire pound adjusting device
KR200492305Y1 (en) 2019-04-10 2020-09-14 정지완 Tension-adjustable sports racket
CN113908504A (en) * 2021-11-04 2022-01-11 四川启睿克科技有限公司 Intelligent badminton racket and intelligent badminton racket control system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002272882A (en) 2001-03-16 2002-09-24 Akifumi Nakane Device for string gut
JP2005319238A (en) * 2004-05-06 2005-11-17 Hiroshi Takahashi Tension meter for tennis racket
KR101217095B1 (en) * 2009-09-15 2012-12-31 승덕남 Racket for emitting light using an electromagnetic induction, and emitting method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002272882A (en) 2001-03-16 2002-09-24 Akifumi Nakane Device for string gut
JP2005319238A (en) * 2004-05-06 2005-11-17 Hiroshi Takahashi Tension meter for tennis racket
KR101217095B1 (en) * 2009-09-15 2012-12-31 승덕남 Racket for emitting light using an electromagnetic induction, and emitting method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200492305Y1 (en) 2019-04-10 2020-09-14 정지완 Tension-adjustable sports racket
CN111569382A (en) * 2020-05-21 2020-08-25 三峡大学 Badminton racket capable of adjusting beat line pound and stay wire pound adjusting device
CN111569382B (en) * 2020-05-21 2021-10-19 三峡大学 Badminton racket capable of adjusting beat line pound and stay wire pound adjusting device
CN113908504A (en) * 2021-11-04 2022-01-11 四川启睿克科技有限公司 Intelligent badminton racket and intelligent badminton racket control system

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