WO2007142377A1 - An eccentric-revolutionary body and a vibration apparatus comprising the same - Google Patents

An eccentric-revolutionary body and a vibration apparatus comprising the same Download PDF

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Publication number
WO2007142377A1
WO2007142377A1 PCT/KR2006/002536 KR2006002536W WO2007142377A1 WO 2007142377 A1 WO2007142377 A1 WO 2007142377A1 KR 2006002536 W KR2006002536 W KR 2006002536W WO 2007142377 A1 WO2007142377 A1 WO 2007142377A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotating body
eccentric rotating
eccentric
rotational force
vibration
Prior art date
Application number
PCT/KR2006/002536
Other languages
French (fr)
Inventor
Dea-Sung Jang
Sang-Kyu Lee
Woo-Young Cho
Original Assignee
Ceragem Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ceragem Co., Ltd. filed Critical Ceragem Co., Ltd.
Publication of WO2007142377A1 publication Critical patent/WO2007142377A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H11/00—Belts, strips or combs for massage purposes
    • A61H11/02—Massage devices with strips oscillating lengthwise
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/061—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses

Definitions

  • the present invention relates to an eccentric rotating body and a vibration apparatus comprising the same, and more particularly, to an eccentric rotating body capable of simultaneously performing eccentric revolution and centrifugal revolution in a stable state to produce an eccentric motion as a whole, and a vibration apparatus comprising the eccentric rotating body.
  • One of the exercise equipment is a vibration belt capable of efficiently getting rid of surplus fat at the waist.
  • the vibration belt is a product obtained by functionally improving a conventional belt.
  • a vibration apparatus for generating minute vibration is mounted inside the belt so that surplus fat at the waist can be get rid of by using a minute vibration force generated from the vibration apparatus.
  • Vibration belts well known nowadays include "Massage Belt” disclosed in Korean Utility Model Registration No. 20-290294, "Electric Massage Belt” disclosed in Korean
  • the massage belt disclosed in Korean Utility Model Registration No. 20-290294 comprises an electric motor for generating a rotational force, a plurality of interlocking gears and interlocking shafts for transmitting the rotational force from the electric motor, two eccentric rotating bodies for generating eccentric revolution through the interlocking shafts, and a housing body for mounting them therein.
  • the two eccentric rotating bodies are eccentrically rotated and each of them can provide a vibrational force due to an eccentric force by itself.
  • the eccentric rotating bodies are symmetrically arranged on the right and left sides with respect to the electric motor, there is an aspect in which the eccentric motional forces of the eccentric rotating bodies are offset with each other.
  • the eccentric motions of the eccentric rotating bodies cannot be efficiently used.
  • Fig. 1 is an exploded perspective view schematically showing a vibration apparatus used in a vibration belt commercially available on the market.
  • the vibration apparatus 10 for a vibration belt commercially available on the market comprises an electric motor for generating a rotational force, a timing belt for transmitting the rotational force from the electric motor, an interlocking pulley 20 rotated by the rotational force transmitted by the timing belt, a rotational shaft 30 coupled to the interlocking pulley and rotated together with the interlocking pulley, upper and lower supports 32 and 34 coupled to the rotational shaft 30 at upper and lower portions thereof and eccentrically rotated together with the rotational shaft, and an eccentric rotating member 36 coupled to the upper and lower supports.
  • reference numeral 40 that has not yet been described is bearings coupled to the rotational shaft 30.
  • the rotational force is transmitted to the interlocking pulley 20 by the timing belt and the transmitted rotational force rotates the rotational shaft 30 at high speed. Therefore, the upper and lower supports 32 and 34 eccentrically coupled to the rotational shaft 30 are eccentrically rotated at high speed, and the eccentric rotating member 36 coupled between the supports is rotated at high speed.
  • the upper and lower supports 32 and 34 which are formed as separate components and coupled to the rotational shaft 30, are eccentrically rotated at high speed in the state where the heavy, eccentric rotating member 36 is eccentrically mounted at a side to the supports.
  • the rotational shaft 30 is burdened with heavy load that in turn is concentrated on the coupled portions of the upper and lower supports 32 and 34.
  • the coupled portions of the upper and lower supports 32 and 34 should wholly cope with stress generated due to the change of the rotation direction as it is. This is a common problem in all vibration apparatuses used for the aforementioned conventional vibration belts.
  • vibration apparatuses for vibration belts commercially available on the market employ rotational shafts made in the form of polygonal rods (for example, current products employ rotational shafts in the form of hexagonal rods).
  • rotational shafts made in the form of polygonal rods for example, current products employ rotational shafts in the form of hexagonal rods.
  • an object of the present invention is to provide an eccentric rotating body, which is structurally improved such that even when an electric motor rotates at high speed, the eccentric rotating body can be rotated by directly receiving a rotational force from the electric motor.
  • Another object of the present invention is to provide a vibration apparatus comprising the structurally improved, eccentric rotating body.
  • a further object of the present invention is to provide a method of using the vibration apparatus comprising the structurally improved, eccentric rotating body.
  • An eccentric rotating body comprises an eccentric rotating body positioned at a longitudinally central region of a cylindrical preform for the eccentric rotating body and formed of a remainder of about 1/2 to 1/8 of the cylindrical preform by cutting out about 1/2 to 7/8 of the cylindrical preform including a central axis thereof; an upper disk-shaped rotating portion positioned at an upper end of the eccentric rotating portion, and a lower disk-shaped rotating portion positioned at a lower end of the eccentric rotating portion; and a central shaft portion defining a central axis in a longitudinal direction of the cylindrical preform.
  • the central shaft portion serves as a central axis of rotation for the eccentric rotating body of the present invention when the eccentric rotating body is rotated.
  • the central shaft portion may be formed of cylinders extending outwardly from the centers of the upper and lower disk-shaped rotating portions, or formed of a cylindrical hollow penetrating through the centers of the upper and lower disk-shaped rotating portions.
  • the upper disk-shaped rotating portion preferably has a belt engaging section at a circular outer peripheral surface thereof.
  • the belt engaging section may be formed directly on the outer peripheral surface or formed by inwardly engraving it along the outer peripheral surface.
  • a vibration apparatus of the present invention comprises a housing coupled to the vibration belt and containing respective components mounted therein; an electric motor for generating a rotational force, the electric motor being mounted in the housing; a power transmission belt for transmitting the rotational force generated from the electric motor; the eccentric rotating body for generating an eccentric rotational force while being rotated at high speed by the rotational force transmitted through the power transmission belt; and a fixing shaft fitted into the central shaft portion of the eccentric rotating body and fixedly coupled to the housing regardless of the highspeed rotation of the eccentric rotating body.
  • bearings be further provided in bearing coupling holes formed in the upper and lower disk-shaped rotating portions of the eccentric rotating body.
  • the present invention is directed to a method of using a vibration apparatus comprising the eccentric rotating body.
  • the method comprises the steps of generating a rotational force by the electric motor in the housing to be rotated at high speed; transmitting the rotational force generated from the electric motor through the power transmission belt; and generating an eccentric rotational force by causing the upper disk-shaped rotating body of the eccentric rotating body to directly receive the rotational force transmitted through the power transmission belt and by directly rotating the eccentric rotating body at high speed.
  • the eccentric rotating body of the present invention is manufactured by cutting a single article as a cylindrical preform, there is an advantage in that the manufacturing process can be greatly simplified.
  • eccentric rotating body of the present invention a rotational force from an electric motor is transmitted directly to an eccentric rotating portion that is an integral part of the eccentric rotating body, so that the eccentric rotating body can be directly rotated by the rotational force.
  • a vibration apparatus manufactured using the eccentric rotating body of the present invention generally comprises an electric motor, a power transmission belt and the eccentric rotating body, and the eccentric rotating body corresponds to a single component.
  • the vibration apparatus is characterized in that it comprises only several, very simple components.
  • the vibration apparatus of the present invention can be very easily and simply assembled upon assembly thereof, noise due to respective components can be reduced upon use thereof, and the mechanical life thereof can be greatly prolonged.
  • Fig. 1 is an exploded perspective view schematically showing a vibration apparatus used in a vibration belt commercially available on the market.
  • Fig. 2 schematically shows an eccentric rotating body according to the present invention, wherein Figs. 2 A to 2E illustrate preferred embodiments of the eccentric rotating body.
  • Fig. 3 shows coupling relationships among the eccentric rotating body, a fixing shaft and bearings, which are main components of a vibration apparatus according to the present invention.
  • Fig. 4 is a sectional view schematically showing an assembled state of the vibration apparatus according to the present invention.
  • Fig. 5 is a perspective view schematically showing main components in the assembled state of the vibration apparatus according to the present invention.
  • Fig. 2 schematically shows an eccentric rotating body 100 according to the present invention, wherein Figs. 2 A to 2E illustrate preferred embodiments of the eccentric rotating body 100.
  • the eccentric rotating body 100 of the present invention comprises an eccentric rotating portion 110 positioned at a longitudinally central region of a cylindrical preform for the eccentric rotating body.
  • the cylindrical preform is preferably manufactured out of an iron-based material such as by cutting a steel rod into a certain length. This is because a steel product with heavy weight is preferred to generate an eccentric force through high-speed rotation.
  • the eccentric rotating portion 110 can be manufactured by cutting the cylindrical preform.
  • the reason why the eccentric rotating portion 110 is formed of the remainder of the cylindrical preform which is left after cutting out the cylindrical preform is that convenience of machining is taken into consideration and in view of relationships with other components, they are intended to establish an integral relationship as parts of an identical main body so that they can be stably rotated even at high speed.
  • the eccentric rotating body 100 of the present invention comprises an upper disk- shaped rotating portion 120 at positioned at an upper end of the eccentric rotating portion 110.
  • the upper disk-shaped rotating portion 120 is a portion of the cylindrical preform, which has not been subjected to cutting, and has a circular outer peripheral surface.
  • the upper disk-shaped rotating portion 120 is formed integrally with the eccentric rotating portion 110 while taking the shape of a disk as a whole. Contrary to the eccentric rotating portion 110, the upper disk-shaped rotating portion 120 is centrifugally rotated upon rotation thereof at high speed.
  • the eccentric rotating body 100 of the present invention comprises a lower disk- shaped rotating portion 130 positioned at a lower end of the eccentric rotating portion 110.
  • the lower disk-shaped rotating portion 130 is positioned at a side opposite to the upper disk-shaped rotating portion 120.
  • the lower disk-shaped rotating portion 130 is also a portion of the cylindrical preform, which has not been subjected to cutting, and has a circular outer peripheral surface.
  • the lower disk-shaped rotating portion 130 is formed integrally with the eccentric rotating portion 110 while taking the shape of a disk as a whole. Similarly, the lower disk-shaped rotating portion 130 is also centrifugally rotated upon rotation thereof at high speed.
  • the eccentric rotating body 100 of the present invention comprises a central shaft portion 140 of the cylindrical preform.
  • the central shaft portion 140 serves as a central axis of rotation for the eccentric rotating body 100 of the present invention when the eccentric rotating body 100 is rotated.
  • the central shaft portion 140 may be formed of cylinders extending outwardly from the centers of the upper and lower disk-shaped rotating portions 120 and 130 (Fig. 2A), or may be formed of a cylindrical hollow penetrating through the centers of the upper and lower disk-shaped rotating portions (Figs. 2B to 2E).
  • the central shaft portion 140 is formed of a cylindrical hollow (Figs. 2B to 2E)
  • this is made by drilling the cylindrical preform in the central axis direction to form the cylindrical hollow.
  • a fixing shaft 240 is subsequently fitted into and engaged with the hollow.
  • the eccentric rotating portion 110 and the upper and lower disk-shaped rotating portions 120 and 130 are formed by machining a single cylindrical preform so as to establish a relationship in which they are integrally coupled with one another.
  • the upper disk-shaped rotating portion 120 preferably has a belt engaging section 122 at the circular outer peripheral surface thereof.
  • the belt engaging section 122 may be formed directly on the outer peripheral surface or formed by inwardly engraving it along the outer peripheral surface.
  • the belt engaging section 122 is formed directly on the outer peripheral surface of the upper disk-shaped rotating portion 120, there is an advantage in that the rotational force generated from the electric motor 220 is transmitted directly to the eccentric rotating body 100 by means of a power transmission belt 230. Further, since other components are not used as media, there is an advantage in that a resistance force or a frictional force due to the media can be prevented, thereby more efficiently transmitting the rotational force.
  • a timing belt or V-belt may be used for the belt engaging section 122.
  • the upper and lower disk- shaped rotating portions 120 and 130 be further provided with bearing coupling holes 150 around the central shaft portion 140. Bearings 250 are coupled to the bearing coupling holes 150.
  • the present invention is directed to a vibration apparatus 200 comprising the eccentric rotating body 100.
  • Fig. 3 shows coupling relationships among the eccentric rotating body 100, the fixing shaft 240 and the bearings 250, which are main components of the vibration apparatus 200 according to the present invention.
  • Fig. 4 is a sectional view schematically showing an assembled state of the vibration apparatus 200 according to the present invention
  • Fig. 5 is a perspective view schematically showing main components in the assembled state of the vibration apparatus 200 according to the present invention.
  • the vibration apparatus of the present invention comprises a housing that is coupled to a vibration belt and contains the respective components mounted therein.
  • the housing 210 is functionally similar to that of a conventional vibration apparatus.
  • the vibration apparatus 200 of the present invention comprises the electric motor 220 for generating a rotational force, which is mounted in the housing 210.
  • the electric motor 220 generates a rotational force by receiving external electric energy.
  • the vibration apparatus 200 of the present invention comprises the power transmission belt 230 for transmitting the rotational force generated from the electric motor 220 to other components.
  • One of a timing belt and a V-belt commonly used may be selectively used as the power transmission belt 230.
  • the vibration apparatus 200 of the present invention comprises the eccentric rotating body 100 for generating an eccentric rotational force while being rotated at high speed by the rotational force transmitted through the power transmission belt 230. Since the eccentric rotating body 100 has been already described above, a detailed description thereof will be omitted. Referring to Figs. 3 to 5, the eccentric rotating body 100 is specifically shown as having particular configurations. However, it will be apparent that this is only for illustrative purposes and the scope of the invention is not intended to be limited to those shown in the figures.
  • the vibration apparatus 200 of the present invention comprises the fixing shaft 240 to be fitted into the central shaft portion 140 of the eccentric rotating body. Both ends of the fixing shaft 240 are securely fixed to the housing 210 and still maintained in the state fixedly coupled to the housing 210 even when the eccentric rotating body 100 is rotated at high speed.
  • the vibration apparatus 200 of the present invention constitutes one of features different from those of conventional vibration apparatuses.
  • the vibration apparatus 200 further comprise the bearings 250.
  • inner peripheries of the bearings 250 are engaged with the fixing shaft 240, and outer peripheries thereof are engaged with the bearing coupling holes 150 formed at the upper and lower disk-shaped rotating portions. This is to allow the fixing shaft 240 to be maintained in the fixed state without being influenced by the high-speed rotation of the eccentric rotating body 100.
  • the vibration apparatus 200 of the present invention is also different from conventional vibration apparatuses.
  • the present invention is directed to a method of using the vibration apparatus 200 comprising the eccentric rotating body 100. This can be readily understood by examining the operational relationship among the respective components in the vibration apparatus of the present invention.
  • the electric motor 220 mounted in the housing 210 is operated by electrical energy. As a rotational shaft of the electric motor 220 rotates at high speed, a rotational force is generated.
  • the rotational force generated from the electric motor 220 is transmitted to the power transmission belt 230 engaged with the rotational shaft of the electric motor 220 and subsequently to the upper disk-shaped rotating portion 120 engaged with the power transmission belt 230 therethrough.
  • the rotational force generated from the electric motor 220 is transmitted to the upper disk-shaped rotating portion 120, and at the same time, directly to the eccentric rotating body 100 so that the eccentric rotating body 100 can be rotated at high speed.
  • the eccentric rotating portion 110 formed as an integral portion of the eccentric rotating body 100 at the central region thereof is also rotated together at high speed.
  • the eccentric rotating portion 110 is constructed of about 1/2 to 1/8 of the eccentric rotating body existing only at a side thereof, it causes an eccentric motion according to the highspeed rotation.
  • the eccentric motion resulting from the high-speed rotation of the eccentric rotating body 100 vibrates the housing 210 of the vibration apparatus 200.
  • the use of the vibration enables the user utilizing the vibration belt to be blessed with a tapotement or massage function, and the like.
  • the present invention provides the eccentric rotating body for causing lateral leaning upon rotation thereof at high speed, and a vibration apparatus comprising the eccentric rotating body.
  • a vibration apparatus comprising the eccentric rotating body.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

The present invention relates to an eccentric rotating body and a vibration apparatus comprising the same. The vibration apparatus of the present invention employs an eccentric rotating body manufactured by integrally machining a cylindrical steel rod. In the present invention, the eccentric rotating body comprises an eccentric rotating body formed of a remainder of about 1/2 to 1/8 of the cylindrical steel rod by cutting out about 1/2 to 7/8 of the cylindrical steel rod at a central region thereof, and upper and lower disk- shaped rotating portions connected to the eccentric rotating portion, so that all of them can be integrally manufactured. In the vibration apparatus of the present invention, the eccentric rotating body is rotated by causing the upper disk-shaped rotating portion to directly receive a rotational force from an electric motor. The rotational force generated from the electric motor can be efficiently used and stable and uniform minute vibration can be generated.

Description

AN ECCENTRIC-REVOLUTIONARY BODY AND A VIBRATION APPARATUS
COMPRISING THE SAME
Technical Field
The present invention relates to an eccentric rotating body and a vibration apparatus comprising the same, and more particularly, to an eccentric rotating body capable of simultaneously performing eccentric revolution and centrifugal revolution in a stable state to produce an eccentric motion as a whole, and a vibration apparatus comprising the eccentric rotating body.
Background Art
Nowadays, many people are greatly interested in their physical heath and make an effort to keep and manage their healthy bodies. Taking exercise steadily at predetermined times every day is most preferred in order to keep physical health. Nobody can deny the importance of exercise as a means for keeping health.
In spite of sufficient recognition of the importance of exercise as a means for keeping health, there are few people who steadily continue to take exercise every day in practice. This is because everyday affairs inhibit people from sparing time for exercise or it is difficult to spare time in practice.
Continuous efforts have been made to lead healthier life while overcoming such actual difficulties and include use of exercise equipment that can substitute for physical exercise. One of the exercise equipment is a vibration belt capable of efficiently getting rid of surplus fat at the waist.
The vibration belt is a product obtained by functionally improving a conventional belt. In the vibration belt, a vibration apparatus for generating minute vibration is mounted inside the belt so that surplus fat at the waist can be get rid of by using a minute vibration force generated from the vibration apparatus. Vibration belts well known nowadays include "Massage Belt" disclosed in Korean Utility Model Registration No. 20-290294, "Electric Massage Belt" disclosed in Korean
Utility Model Registration No. 20-345251, and those commercially available on the market.
The massage belt disclosed in Korean Utility Model Registration No. 20-290294 comprises an electric motor for generating a rotational force, a plurality of interlocking gears and interlocking shafts for transmitting the rotational force from the electric motor, two eccentric rotating bodies for generating eccentric revolution through the interlocking shafts, and a housing body for mounting them therein. At this time, the two eccentric rotating bodies are eccentrically rotated and each of them can provide a vibrational force due to an eccentric force by itself. However, so far as the eccentric rotating bodies are symmetrically arranged on the right and left sides with respect to the electric motor, there is an aspect in which the eccentric motional forces of the eccentric rotating bodies are offset with each other. Thus, there is a disadvantage in that the eccentric motions of the eccentric rotating bodies cannot be efficiently used.
Meanwhile, "Electric Massage Belt" disclosed in Korean Utility Model Registration No. 20-345251 is to remove noise generated from interlocking gears upon rotation of an electric motor at high speed by substituting the interlocking gears in a housing body with a timing belt. However, eccentric rotating bodies are also arranged symmetrically on the right and left sides. Thus, there is still a disadvantage in that the eccentric motions of the eccentric rotating bodies cannot be efficiently used. In consideration of the disadvantage, a vibration belt capable of generating one eccentric motion with one electric motor is commercially available on the market.
Fig. 1 is an exploded perspective view schematically showing a vibration apparatus used in a vibration belt commercially available on the market.
The vibration apparatus 10 for a vibration belt commercially available on the market comprises an electric motor for generating a rotational force, a timing belt for transmitting the rotational force from the electric motor, an interlocking pulley 20 rotated by the rotational force transmitted by the timing belt, a rotational shaft 30 coupled to the interlocking pulley and rotated together with the interlocking pulley, upper and lower supports 32 and 34 coupled to the rotational shaft 30 at upper and lower portions thereof and eccentrically rotated together with the rotational shaft, and an eccentric rotating member 36 coupled to the upper and lower supports. At this time, reference numeral 40 that has not yet been described is bearings coupled to the rotational shaft 30.
When the electric motor rotates at high speed in the vibration apparatus 10 commercially available on the market, the rotational force is transmitted to the interlocking pulley 20 by the timing belt and the transmitted rotational force rotates the rotational shaft 30 at high speed. Therefore, the upper and lower supports 32 and 34 eccentrically coupled to the rotational shaft 30 are eccentrically rotated at high speed, and the eccentric rotating member 36 coupled between the supports is rotated at high speed.
As the electric motor rotates at high speed, the upper and lower supports 32 and 34, which are formed as separate components and coupled to the rotational shaft 30, are eccentrically rotated at high speed in the state where the heavy, eccentric rotating member 36 is eccentrically mounted at a side to the supports. Thus, the rotational shaft 30 is burdened with heavy load that in turn is concentrated on the coupled portions of the upper and lower supports 32 and 34. Further, when the rotation direction of the electric motor that rotates at high speed is suddenly changed, the coupled portions of the upper and lower supports 32 and 34 should wholly cope with stress generated due to the change of the rotation direction as it is. This is a common problem in all vibration apparatuses used for the aforementioned conventional vibration belts.
Disclosure
Technical Problem
In consideration of the problems, vibration apparatuses for vibration belts commercially available on the market employ rotational shafts made in the form of polygonal rods (for example, current products employ rotational shafts in the form of hexagonal rods). However, a fundamental solution has not yet been found.
Accordingly, an object of the present invention is to provide an eccentric rotating body, which is structurally improved such that even when an electric motor rotates at high speed, the eccentric rotating body can be rotated by directly receiving a rotational force from the electric motor. Another object of the present invention is to provide a vibration apparatus comprising the structurally improved, eccentric rotating body.
A further object of the present invention is to provide a method of using the vibration apparatus comprising the structurally improved, eccentric rotating body.
Technical Solution
An eccentric rotating body according to the present invention comprises an eccentric rotating body positioned at a longitudinally central region of a cylindrical preform for the eccentric rotating body and formed of a remainder of about 1/2 to 1/8 of the cylindrical preform by cutting out about 1/2 to 7/8 of the cylindrical preform including a central axis thereof; an upper disk-shaped rotating portion positioned at an upper end of the eccentric rotating portion, and a lower disk-shaped rotating portion positioned at a lower end of the eccentric rotating portion; and a central shaft portion defining a central axis in a longitudinal direction of the cylindrical preform. In the present invention, the central shaft portion serves as a central axis of rotation for the eccentric rotating body of the present invention when the eccentric rotating body is rotated. The central shaft portion may be formed of cylinders extending outwardly from the centers of the upper and lower disk-shaped rotating portions, or formed of a cylindrical hollow penetrating through the centers of the upper and lower disk-shaped rotating portions.
In the present invention, the upper disk-shaped rotating portion preferably has a belt engaging section at a circular outer peripheral surface thereof. The belt engaging section may be formed directly on the outer peripheral surface or formed by inwardly engraving it along the outer peripheral surface. In the present invention, it is preferred that the upper and lower disk-shaped rotating portions be further provided with bearing coupling holes if the central shaft portion is formed of a cylindrical hollow.
Moreover, the present invention is directed to a vibration apparatus comprising the eccentric rotating body. A vibration apparatus of the present invention comprises a housing coupled to the vibration belt and containing respective components mounted therein; an electric motor for generating a rotational force, the electric motor being mounted in the housing; a power transmission belt for transmitting the rotational force generated from the electric motor; the eccentric rotating body for generating an eccentric rotational force while being rotated at high speed by the rotational force transmitted through the power transmission belt; and a fixing shaft fitted into the central shaft portion of the eccentric rotating body and fixedly coupled to the housing regardless of the highspeed rotation of the eccentric rotating body.
In the present invention, it is preferred that bearings be further provided in bearing coupling holes formed in the upper and lower disk-shaped rotating portions of the eccentric rotating body.
Furthermore, the present invention is directed to a method of using a vibration apparatus comprising the eccentric rotating body. The method comprises the steps of generating a rotational force by the electric motor in the housing to be rotated at high speed; transmitting the rotational force generated from the electric motor through the power transmission belt; and generating an eccentric rotational force by causing the upper disk-shaped rotating body of the eccentric rotating body to directly receive the rotational force transmitted through the power transmission belt and by directly rotating the eccentric rotating body at high speed.
Advantageous Effects
As described above, since the eccentric rotating body of the present invention is manufactured by cutting a single article as a cylindrical preform, there is an advantage in that the manufacturing process can be greatly simplified.
Further, in the eccentric rotating body of the present invention, a rotational force from an electric motor is transmitted directly to an eccentric rotating portion that is an integral part of the eccentric rotating body, so that the eccentric rotating body can be directly rotated by the rotational force. Thus, there is an advantage in that there is no need for transmitting the rotational force via any other components.
Moreover, since a vibration apparatus manufactured using the eccentric rotating body of the present invention generally comprises an electric motor, a power transmission belt and the eccentric rotating body, and the eccentric rotating body corresponds to a single component. Thus, the vibration apparatus is characterized in that it comprises only several, very simple components.
Accordingly, there are advantages in that the vibration apparatus of the present invention can be very easily and simply assembled upon assembly thereof, noise due to respective components can be reduced upon use thereof, and the mechanical life thereof can be greatly prolonged.
Brief Description of Drawings Fig. 1 is an exploded perspective view schematically showing a vibration apparatus used in a vibration belt commercially available on the market.
Fig. 2 schematically shows an eccentric rotating body according to the present invention, wherein Figs. 2 A to 2E illustrate preferred embodiments of the eccentric rotating body. Fig. 3 shows coupling relationships among the eccentric rotating body, a fixing shaft and bearings, which are main components of a vibration apparatus according to the present invention.
Fig. 4 is a sectional view schematically showing an assembled state of the vibration apparatus according to the present invention. Fig. 5 is a perspective view schematically showing main components in the assembled state of the vibration apparatus according to the present invention.
Best Mode
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It will be apparent that the accompanying drawings are merely provided for the purpose of more detailed description of the technical spirit of the invention and the technical spirit of the invention is not limited thereto.
Fig. 2 schematically shows an eccentric rotating body 100 according to the present invention, wherein Figs. 2 A to 2E illustrate preferred embodiments of the eccentric rotating body 100. The eccentric rotating body 100 of the present invention comprises an eccentric rotating portion 110 positioned at a longitudinally central region of a cylindrical preform for the eccentric rotating body. In the present invention, the cylindrical preform is preferably manufactured out of an iron-based material such as by cutting a steel rod into a certain length. This is because a steel product with heavy weight is preferred to generate an eccentric force through high-speed rotation.
In the present invention, the eccentric rotating portion 110 can be manufactured by cutting the cylindrical preform. Here, it is desirable to cut out about 1/2 to 7/8 of the cylindrical preform including a central axis thereof so that the remainder of about 1/2 to 1/8 of the cylindrical preform can form the eccentric rotating portion. If a portion to be cut out is less than 1/2, it is difficult to performing machining and there may be a risk that a centrifugal rotational force is generated to be larger than an eccentric rotational force. If a portion to be cut out is above 7/8, it is likely that the eccentric rotational force will be weak. Thus, it is desirable to perform the cutting in the aforementioned range. In the present invention, the reason why the eccentric rotating portion 110 is formed of the remainder of the cylindrical preform which is left after cutting out the cylindrical preform is that convenience of machining is taken into consideration and in view of relationships with other components, they are intended to establish an integral relationship as parts of an identical main body so that they can be stably rotated even at high speed.
The eccentric rotating body 100 of the present invention comprises an upper disk- shaped rotating portion 120 at positioned at an upper end of the eccentric rotating portion 110. The upper disk-shaped rotating portion 120 is a portion of the cylindrical preform, which has not been subjected to cutting, and has a circular outer peripheral surface. The upper disk-shaped rotating portion 120 is formed integrally with the eccentric rotating portion 110 while taking the shape of a disk as a whole. Contrary to the eccentric rotating portion 110, the upper disk-shaped rotating portion 120 is centrifugally rotated upon rotation thereof at high speed.
The eccentric rotating body 100 of the present invention comprises a lower disk- shaped rotating portion 130 positioned at a lower end of the eccentric rotating portion 110. The lower disk-shaped rotating portion 130 is positioned at a side opposite to the upper disk-shaped rotating portion 120. The lower disk-shaped rotating portion 130 is also a portion of the cylindrical preform, which has not been subjected to cutting, and has a circular outer peripheral surface. The lower disk-shaped rotating portion 130 is formed integrally with the eccentric rotating portion 110 while taking the shape of a disk as a whole. Similarly, the lower disk-shaped rotating portion 130 is also centrifugally rotated upon rotation thereof at high speed.
The eccentric rotating body 100 of the present invention comprises a central shaft portion 140 of the cylindrical preform. The central shaft portion 140 serves as a central axis of rotation for the eccentric rotating body 100 of the present invention when the eccentric rotating body 100 is rotated. The central shaft portion 140 may be formed of cylinders extending outwardly from the centers of the upper and lower disk-shaped rotating portions 120 and 130 (Fig. 2A), or may be formed of a cylindrical hollow penetrating through the centers of the upper and lower disk-shaped rotating portions (Figs. 2B to 2E). In the present invention, if the central shaft portion 140 is formed of a cylindrical hollow (Figs. 2B to 2E), this is made by drilling the cylindrical preform in the central axis direction to form the cylindrical hollow. A fixing shaft 240 is subsequently fitted into and engaged with the hollow.
As such, in the eccentric rotating body 100, the eccentric rotating portion 110 and the upper and lower disk-shaped rotating portions 120 and 130 are formed by machining a single cylindrical preform so as to establish a relationship in which they are integrally coupled with one another.
In the present invention, the upper disk-shaped rotating portion 120 preferably has a belt engaging section 122 at the circular outer peripheral surface thereof. The belt engaging section 122 may be formed directly on the outer peripheral surface or formed by inwardly engraving it along the outer peripheral surface.
In the present invention, if the belt engaging section 122 is formed directly on the outer peripheral surface of the upper disk-shaped rotating portion 120, there is an advantage in that the rotational force generated from the electric motor 220 is transmitted directly to the eccentric rotating body 100 by means of a power transmission belt 230. Further, since other components are not used as media, there is an advantage in that a resistance force or a frictional force due to the media can be prevented, thereby more efficiently transmitting the rotational force. A timing belt or V-belt may be used for the belt engaging section 122. Moreover, in the present invention, it is preferred that the upper and lower disk- shaped rotating portions 120 and 130 be further provided with bearing coupling holes 150 around the central shaft portion 140. Bearings 250 are coupled to the bearing coupling holes 150.
Further, the present invention is directed to a vibration apparatus 200 comprising the eccentric rotating body 100.
Fig. 3 shows coupling relationships among the eccentric rotating body 100, the fixing shaft 240 and the bearings 250, which are main components of the vibration apparatus 200 according to the present invention.
Fig. 4 is a sectional view schematically showing an assembled state of the vibration apparatus 200 according to the present invention, and Fig. 5 is a perspective view schematically showing main components in the assembled state of the vibration apparatus 200 according to the present invention.
The vibration apparatus of the present invention comprises a housing that is coupled to a vibration belt and contains the respective components mounted therein. The housing 210 is functionally similar to that of a conventional vibration apparatus.
The vibration apparatus 200 of the present invention comprises the electric motor 220 for generating a rotational force, which is mounted in the housing 210. The electric motor 220 generates a rotational force by receiving external electric energy.
The vibration apparatus 200 of the present invention comprises the power transmission belt 230 for transmitting the rotational force generated from the electric motor 220 to other components. One of a timing belt and a V-belt commonly used may be selectively used as the power transmission belt 230.
The vibration apparatus 200 of the present invention comprises the eccentric rotating body 100 for generating an eccentric rotational force while being rotated at high speed by the rotational force transmitted through the power transmission belt 230. Since the eccentric rotating body 100 has been already described above, a detailed description thereof will be omitted. Referring to Figs. 3 to 5, the eccentric rotating body 100 is specifically shown as having particular configurations. However, it will be apparent that this is only for illustrative purposes and the scope of the invention is not intended to be limited to those shown in the figures.
The vibration apparatus 200 of the present invention comprises the fixing shaft 240 to be fitted into the central shaft portion 140 of the eccentric rotating body. Both ends of the fixing shaft 240 are securely fixed to the housing 210 and still maintained in the state fixedly coupled to the housing 210 even when the eccentric rotating body 100 is rotated at high speed. In this regard, the vibration apparatus 200 of the present invention constitutes one of features different from those of conventional vibration apparatuses.
In the present invention, it is more preferred that the vibration apparatus 200 further comprise the bearings 250. In the present invention, inner peripheries of the bearings 250 are engaged with the fixing shaft 240, and outer peripheries thereof are engaged with the bearing coupling holes 150 formed at the upper and lower disk-shaped rotating portions. This is to allow the fixing shaft 240 to be maintained in the fixed state without being influenced by the high-speed rotation of the eccentric rotating body 100. In this regard, the vibration apparatus 200 of the present invention is also different from conventional vibration apparatuses. In addition, the present invention is directed to a method of using the vibration apparatus 200 comprising the eccentric rotating body 100. This can be readily understood by examining the operational relationship among the respective components in the vibration apparatus of the present invention.
When a user first applies external power, the electric motor 220 mounted in the housing 210 is operated by electrical energy. As a rotational shaft of the electric motor 220 rotates at high speed, a rotational force is generated.
The rotational force generated from the electric motor 220 is transmitted to the power transmission belt 230 engaged with the rotational shaft of the electric motor 220 and subsequently to the upper disk-shaped rotating portion 120 engaged with the power transmission belt 230 therethrough. The rotational force generated from the electric motor 220 is transmitted to the upper disk-shaped rotating portion 120, and at the same time, directly to the eccentric rotating body 100 so that the eccentric rotating body 100 can be rotated at high speed.
At this time, as the eccentric rotating body 100 is rotated at high speed, the eccentric rotating portion 110 formed as an integral portion of the eccentric rotating body 100 at the central region thereof is also rotated together at high speed. However, since the eccentric rotating portion 110 is constructed of about 1/2 to 1/8 of the eccentric rotating body existing only at a side thereof, it causes an eccentric motion according to the highspeed rotation. The eccentric motion resulting from the high-speed rotation of the eccentric rotating body 100 vibrates the housing 210 of the vibration apparatus 200. The use of the vibration enables the user utilizing the vibration belt to be blessed with a tapotement or massage function, and the like.
Industrial Applicability
The present invention provides the eccentric rotating body for causing lateral leaning upon rotation thereof at high speed, and a vibration apparatus comprising the eccentric rotating body. When the vibration apparatus of the present invention is applied to a belt, minute vibration is transmitted to the waist of a user so that the belt can be used as a vibration belt capable of getting rid of surplus fat at the waist.
Although the eccentric rotating body and the vibration apparatus comprising the same according to the present invention have been described in detail above, they are merely the most preferred embodiments of the present invention. The present invention is not limited thereto and the scope of the invention is defined by the appended claims. It will be apparent that those skilled in the art can make various modifications and changes thereto by reading the descriptions of the specification and these modifications and changes also fall within the scope of the invention.

Claims

1. An eccentric rotating body for use in a vibration apparatus of a vibration belt, comprising: a) an eccentric rotating body positioned at a longitudinally central region of a cylindrical preform for the eccentric rotating body and formed of a remainder of about 1/2 to 1/8 of the cylindrical preform by cutting out about 1/2 to 7/8 of the cylindrical preform including a central axis thereof; b) an upper disk-shaped rotating portion positioned at an upper end of the eccentric rotating portion, and a lower disk-shaped rotating portion positioned at a lower end of the eccentric rotating portion; and c) a central shaft portion defining a central axis in a longitudinal direction of the cylindrical preform.
2. The eccentric rotating body as claimed in claim 1, wherein the central shaft portion is formed of cylinders extending outwardly from the centers of the upper and lower disk- shaped rotating portions.
3. The eccentric rotating body as claimed in claim 1, wherein the central shaft portion is formed of a cylindrical hollow penetrating through the centers of the upper and lower disk-shaped rotating portions.
4. The eccentric rotating body as claimed in claim 1, wherein the upper disk-shaped rotating portion has a belt engaging section at a circular outer peripheral surface thereof.
5. The eccentric rotating body as claimed in claim 3, wherein the upper and lower disk-shaped rotating portions are further provided with bearing coupling holes around the central shaft portion.
6. A vibration apparatus for use in a vibration belt, comprising: a) a housing coupled to the vibration belt and containing respective components mounted therein; b) an electric motor for generating a rotational force, the electric motor being mounted in the housing; c) a power transmission belt for transmitting the rotational force generated from the electric motor; d) an eccentric rotating body for generating an eccentric rotational force while being rotated at high speed by the rotational force transmitted through the power transmission belt, the eccentric rotating body including i) an eccentric rotating body positioned at a longitudinally central region of a cylindrical preform for the eccentric rotating body and formed of a remainder of about 1/2 to 1/8 of the cylindrical preform by cutting out about 1/2 to 7/8 of the cylindrical preform including a central axis thereof, ii) an upper disk-shaped rotating portion positioned at an upper end of the eccentric rotating portion and a lower disk-shaped rotating portion positioned at a lower end of the eccentric rotating portion, and iii) a central shaft portion formed of a cylindrical hollow including a central axis of the cylindrical preform; and e) a fixing shaft fitted into the central shaft portion of the eccentric rotating body and fixedly coupled to the housing regardless of the high-speed rotation of the eccentric rotating body.
7. The vibration apparatus as claimed in claim 6, wherein the upper disk-shaped rotating portion has a belt engaging section at a circular outer peripheral surface thereof.
8. The vibration apparatus as claimed in claim 6, wherein the upper and lower disk- shaped rotating portions are further provided with bearing coupling holes around the central shaft portion.
9. The vibration apparatus as claimed in claim 8, wherein bearings are further provided in the bearing coupling holes.
10. A method of using a vibration apparatus for a vibration belt, comprising the steps of: a) generating a rotational force by an electric motor in a housing to be rotated at high speed; b) transmitting the rotational force generated from the electric motor through a power transmission belt; and c) generating an eccentric rotational force by causing an upper disk-shaped rotating body of an eccentric rotating body to directly receive the rotational force transmitted through the power transmission belt and by directly rotating the eccentric rotating body at high speed.
PCT/KR2006/002536 2006-06-08 2006-06-29 An eccentric-revolutionary body and a vibration apparatus comprising the same WO2007142377A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2006-0051285 2006-06-08
KR1020060051285A KR100684506B1 (en) 2006-06-08 2006-06-08 An eccentric-revolutionary body and a vibration apparatus comprising the same

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WO2007142377A1 true WO2007142377A1 (en) 2007-12-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0555761U (en) * 1991-12-27 1993-07-23 セイコー電子工業株式会社 Vibration motor for pager
KR19990020261U (en) * 1997-11-25 1999-06-15 이형도 Vibration weight of vibration motor
KR200295005Y1 (en) * 2002-08-08 2002-11-16 예명해 kneader
KR20040013902A (en) * 2002-08-09 2004-02-14 주식회사 엠베스트 Single Phase Brushless Vibration Motor Using Film Coils

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990020262U (en) * 1997-11-25 1999-06-15 이형도 Vibration weight of vibration motor
JP3570391B2 (en) * 2001-04-26 2004-09-29 三菱マテリアルシ−エムアイ株式会社 Transducer for vibration generator of small radio

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0555761U (en) * 1991-12-27 1993-07-23 セイコー電子工業株式会社 Vibration motor for pager
KR19990020261U (en) * 1997-11-25 1999-06-15 이형도 Vibration weight of vibration motor
KR200295005Y1 (en) * 2002-08-08 2002-11-16 예명해 kneader
KR20040013902A (en) * 2002-08-09 2004-02-14 주식회사 엠베스트 Single Phase Brushless Vibration Motor Using Film Coils

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