CN220424451U - Internal magnetic control device, flywheel assembly and body-building equipment - Google Patents

Abstract

The utility model discloses an internal magnetic control device, a flywheel assembly and fitness equipment, wherein the internal magnetic control device comprises two swing arms, two magnetic elements, a magnetic control shell and a driving unit. Each set of magnetic elements is respectively arranged on each swing arm, the magnetic control shell is provided with a central perforation, the pivoting end of each swing arm is respectively rotatably arranged on the edge of the magnetic control shell, the two swing arms are symmetrically arranged in the center, the driving unit comprises a driving mechanism, a linkage mechanism and two driving arms, the linkage mechanism is connected with the driving mechanism in a driving way and is arranged to be capable of rotating around the central perforation of the magnetic control shell, and the opposite ends of each driving arm are respectively rotatably arranged on the driven end of each swing arm and the linkage mechanism.

Description

Internal magnetic control device, flywheel assembly and body-building equipment

Technical Field

The utility model relates to the field of fitness equipment, in particular to an internal magnetic control device, a flywheel component and fitness equipment.

Background

Exercise equipment for aerobic exercise based on magnetoresistive spinning, elliptical machines, rowing machines and the like is becoming popular in the market place, which generally comprises a frame body, and an inner magnetic control device, a flywheel and a treading device which are respectively mounted on the frame body, wherein the flywheel surrounds the outer part of the inner magnetic control device and is drivably connected with the treading device. When the user drives the flywheel to rotate relative to the frame body and the inner magnetic control device through the stepping device, the flywheel can cut the magnetic induction lines of the magnetic group of the inner magnetic control device to obtain resistance, so that the user is assisted in body building. The resistance of the flywheel when being driven to rotate can be adjusted by adjusting the relative positions of the magnetic group of the internal magnetic control device and the flywheel, so that a user is helped to achieve different body-building effects. How to easily and reliably drive the magnetic group of the inner magnetic control device to move relative to the flywheel so as to adjust the relative positions of the magnetic group of the inner magnetic control device and the flywheel is a technical problem which the inventor of the present utility model aims to solve.

Disclosure of Invention

It is an object of the present utility model to provide an internal magnetic control device, flywheel assembly and exercise apparatus wherein the linkage of the internal magnetic control device is capable of smoothly driving the swing arm to swing.

It is an object of the present utility model to provide an internal magnetic control device, flywheel assembly and exercise apparatus wherein the linkage of the internal magnetic control device is capable of reliably driving the swing arm to oscillate.

It is an object of the present utility model to provide an internal magnetic control device, a flywheel assembly and exercise equipment, wherein the linkage mechanism of the internal magnetic control device can drive the swing arm to swing at a larger angle, so that the linkage mechanism of the internal magnetic control device can smoothly and reliably drive the swing arm to swing.

According to one aspect of the present utility model, there is further provided an internal magnetic control device comprising:

a magnetic control shell with a central perforation;

at least one set of magnetic elements;

at least one swing arm having a pivoting end and a driven end corresponding to the pivoting end, wherein the pivoting end of the swing arm is rotatably mounted to an edge of the magnetic control housing, and a set of the magnetic elements are disposed outside the swing arm; and

A drive unit comprising a drive mechanism, a linkage mechanism and at least one drive arm, wherein the drive mechanism is mounted to the magnetron housing, wherein the linkage mechanism is drivably connected to the drive mechanism, and the linkage mechanism further comprises a linkage element and at least one linkage arm integrally extending outwardly from the linkage element, the linkage element being configured to be rotatable about the central aperture of the magnetron housing, wherein opposite ends of the drive arm are rotatably mounted to the driven end of the swing arm and an end of the linkage arm remote from the linkage element, respectively.

According to one embodiment of the present utility model, the internal magnetic control device includes two sets of the magnetic elements and two swing arms, one set of the magnetic elements is provided on each of the outer sides of each swing arm, and the two swing arms are provided in a center-symmetrical manner, wherein the interlocking mechanism includes two interlocking arms integrally extended outward from opposite sides of the interlocking element in a symmetrical manner, and the driving unit includes two driving arms, respectively, opposite ends of one driving arm are rotatably mounted to the driven end of one swing arm and an end of one of the interlocking arms away from the interlocking element, and opposite ends of the other driving arm are rotatably mounted to the driven end of the other swing arm and an end of the other interlocking arm away from the interlocking element, respectively.

According to an embodiment of the present utility model, one of the two link arms of the link mechanism is drivably mounted to the drive mechanism.

According to one embodiment of the utility model, the driving mechanism comprises a driving part, an arc-shaped driving element and a set of driving gears, wherein the driving part is fixedly arranged on the magnetic control shell, the driving element is slidably arranged on the magnetic control shell, each gear in the set of driving gears is rotatably arranged on the magnetic control shell, one gear in the set of driving gears is meshed with a worm of the driving part, one gear in the set of driving gears is meshed with driven teeth of the driving element, and the linkage arm is rotatably arranged on the driving element.

According to one embodiment of the utility model, the magnetic control housing has an arcuate guide rail, the drive element has an arcuate rail slot, the guide rail of the magnetic control housing extends to the rail slot of the drive element to allow the drive element to ride on the guide rail of the magnetic control housing such that the drive element is slidably mounted to the magnetic control housing.

According to one embodiment of the utility model, the connection location of the linkage arm and the driving element is adjacent to the connection location of the driven end of the swing arm and the linkage arm.

According to one embodiment of the utility model, the connection position of the linkage arm and the driving element coincides with the connection position of the driven ends of the linkage arm and the swing arm.

According to one embodiment of the utility model, the internal magnetic control device further comprises a potential control unit comprising a rotary potentiometer and a driven gear sleeved on the rotary potentiometer, the driven gear being rotatably mounted to the magnetic control housing and the driving teeth being engaged to the driving element.

According to another aspect of the present utility model, there is further provided a flywheel assembly comprising an inner magnetic control device and a flywheel, wherein the flywheel is disposed around the outer side of the inner magnetic control device, wherein the inner magnetic control device further comprises:

a magnetic control shell with a central perforation;

at least one set of magnetic elements;

at least one swing arm having a pivoting end and a driven end corresponding to the pivoting end, wherein the pivoting end of the swing arm is rotatably mounted to an edge of the magnetic control housing, and a set of the magnetic elements are disposed outside the swing arm; and

A drive unit comprising a drive mechanism, a linkage mechanism and at least one drive arm, wherein the drive mechanism is mounted to the magnetron housing, wherein the linkage mechanism is drivably connected to the drive mechanism, and the linkage mechanism further comprises a linkage element and at least one linkage arm integrally extending outwardly from the linkage element, the linkage element being configured to be rotatable about the central aperture of the magnetron housing, wherein opposite ends of the drive arm are rotatably mounted to the driven end of the swing arm and an end of the linkage arm remote from the linkage element, respectively.

According to another aspect of the present utility model, there is further provided an exercise apparatus comprising:

a machine frame;

a treading device;

a flywheel; and

an internal magnetic control device, wherein the internal magnetic control device is mounted to the equipment rack, the tread device is trampably mounted to the equipment rack, the flywheel is rotatably mounted to the equipment rack and drivably connected to the tread device, and the flywheel is disposed around the outside of the internal magnetic control device, wherein the internal magnetic control device further comprises:

A magnetic control shell with a central perforation;

at least one set of magnetic elements;

at least one swing arm having a pivoting end and a driven end corresponding to the pivoting end, wherein the pivoting end of the swing arm is rotatably mounted to an edge of the magnetic control housing, and a set of the magnetic elements are disposed outside the swing arm; and

a drive unit comprising a drive mechanism, a linkage mechanism and at least one drive arm, wherein the drive mechanism is mounted to the magnetron housing, wherein the linkage mechanism is drivably connected to the drive mechanism, and the linkage mechanism further comprises a linkage element and at least one linkage arm integrally extending outwardly from the linkage element, the linkage element being configured to be rotatable about the central aperture of the magnetron housing, wherein opposite ends of the drive arm are rotatably mounted to the driven end of the swing arm and an end of the linkage arm remote from the linkage element, respectively.

According to another aspect of the present utility model, there is further provided an internal magnetic control device, comprising:

a magnetic control shell with a central perforation;

Two sets of magnetic elements;

the two swing arms are respectively provided with a pivoting end and a driven end corresponding to the pivoting end, the pivoting ends of the two swing arms are respectively rotatably arranged at the edge of the magnetic control shell, and the two swing arms are arranged in a central symmetry manner, wherein a group of magnetic elements are respectively arranged at the outer side of each swing arm;

a drive unit, further comprising:

a driving mechanism mounted to the magnetic control housing;

a linkage mechanism including a linkage member configured to be rotatable about the center through hole of the magnetic control housing, a linkage arm integrally extending outwardly from the linkage member, one end portion of the linkage arm being rotatably mounted to the linkage member, and a middle portion of the linkage arm being drivably connected to the driving mechanism; and

the two driving arms, wherein the opposite ends of one driving arm are respectively rotatably arranged at the driven end of one swinging arm and the end part of the connecting arm far away from the connecting element, and the opposite ends of the other driving arm are respectively rotatably arranged at the driven end of the other swinging arm and the end part of the movable arm far away from the connecting element.

According to one embodiment of the present utility model, the driving mechanism further includes a driving portion fixedly mounted to the magnetic control housing, a driving member including a screw shaft rotatably mounted to the magnetic control housing and a screw holder drivably provided to the screw shaft, the movable arm being slidably connected to the screw holder, each of the gears of the driving gears of a set being rotatably mounted to the magnetic control housing, and one of the gears of a set being engaged with a worm of the driving portion, one end of the screw shaft being engaged with one of the gears of a set of the driving gears.

According to one embodiment of the utility model, the screw seat has a protrusion, the movable arm has a sliding groove, the sliding groove extends along the length direction of the movable arm, wherein the protrusion of the screw seat protrudes into the sliding groove of the movable arm, and the protrusion of the screw seat is allowed to slide along the sliding groove of the movable arm.

According to one embodiment of the present utility model, the internal magnetic control device further includes a potential control unit including a sliding potentiometer, the sliding potentiometer further including a fixed portion and a sliding portion slidably provided to the fixed portion, the fixed portion being fixedly provided to the magnetic control housing, the sliding portion being mounted at a connection position of the linking member and the movable arm.

According to another aspect of the present utility model, there is further provided a flywheel assembly comprising an inner magnetic control device and a flywheel, wherein the flywheel is disposed around the outer side of the inner magnetic control device, wherein the inner magnetic control device further comprises:

a magnetic control shell with a central perforation;

two sets of magnetic elements;

the two swing arms are respectively provided with a pivoting end and a driven end corresponding to the pivoting end, the pivoting ends of the two swing arms are respectively rotatably arranged at the edge of the magnetic control shell, and the two swing arms are arranged in a central symmetry manner, wherein a group of magnetic elements are respectively arranged at the outer side of each swing arm;

a drive unit, further comprising:

a driving mechanism mounted to the magnetic control housing;

a linkage mechanism including a linkage member configured to be rotatable about the center through hole of the magnetic control housing, a linkage arm integrally extending outwardly from the linkage member, one end portion of the linkage arm being rotatably mounted to the linkage member, and a middle portion of the linkage arm being drivably connected to the driving mechanism; and

The two driving arms, wherein the opposite ends of one driving arm are respectively rotatably arranged at the driven end of one swinging arm and the end part of the connecting arm far away from the connecting element, and the opposite ends of the other driving arm are respectively rotatably arranged at the driven end of the other swinging arm and the end part of the movable arm far away from the connecting element.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following more particular description of embodiments of the present utility model, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain the utility model. In the drawings, like reference numerals generally refer to like parts or steps.

FIG. 1 illustrates an application environment of an internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model.

Fig. 2A and 2B show a perspective state of the internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model, respectively, from different viewpoints.

Fig. 3 shows an exploded state of the internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model.

Fig. 4A and 4B show, respectively, from different perspectives, another exploded state of the internal magnetic control device of the exercise apparatus according to the above-described preferred embodiment of the present utility model.

Fig. 5 shows a top view of a partial structure of the internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model.

Fig. 6 shows a top view of a partial structure of still another internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model.

FIG. 7 shows an exploded view of another internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model.

Fig. 8A and 8B show another exploded state of the internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model, respectively, from different viewpoints.

Fig. 9 shows a top view of a partial structure of the internal magnetic control device of the exercise apparatus according to the above preferred embodiment of the present utility model.

Description of the embodiments

Before any embodiments of the utility model are explained in detail, it is to be understood that the utility model is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The utility model is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Furthermore, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

Also, in the present disclosure, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus the above terms should not be construed as limiting the present disclosure; in a second aspect, the terms "a" and "an" should be understood as "at least one" or "one or more", i.e. in one embodiment the number of one element may be one, while in another embodiment the number of the element may be plural, the term "a" should not be construed as limiting the number.

Fig. 1-5 illustrate an internal magnetic control device 100 according to a preferred embodiment of the present utility model, the internal magnetic control device 100 being used to provide a magnetic field environment, wherein the exercise apparatus employs the internal magnetic control device 100 of the present utility model.

It is worth mentioning that the exercise apparatus implemented as an elliptical machine is only exemplary, and is not limiting to the specific type of exercise apparatus of the present utility model. For example, in other examples of the utility model, the exercise apparatus may also be a rowing machine, a spinning, or the like.

The exercise apparatus of the present utility model comprises the internal magnetic control device 100, an apparatus frame, a pedal device, and a flywheel 400, wherein the internal magnetic control device 100 is mounted to the apparatus frame, wherein the pedal device is pedal-mounted to the apparatus frame, wherein the flywheel 400 is rotatably mounted to the apparatus frame and is drivably connected to the pedal device, and the flywheel 400 is disposed around the outside of the internal magnetic control device 100. When the user continuously steps on the stepping device to drive the flywheel 400 to rotate relative to the inner magnetic control device 100 and the equipment rack, the flywheel 400 continuously cuts the magnetic induction line of the inner magnetic control device 100 to obtain a load, so that the user can achieve the purpose of body building through the body building equipment.

It will be appreciated that the load that the flywheel 400 achieves when driven to rotate is related to the amount by which the flywheel 400 cuts the magnetic induction lines of the inner magnetic control device 100. Specifically, the greater the amount of magnetic induction lines of the inner magnetic control device 100 that the flywheel 400 cuts when driven to rotate, the greater the load that the flywheel 400 can achieve, at which time the more laborious the user steps on the stepping device. Accordingly, the smaller the amount of magnetic induction lines of the inner magnetic control device 100 cut when the flywheel 400 is driven to rotate, the smaller the load the flywheel 400 can obtain, and the more effort the user saves when stepping on the stepping device.

It should be noted that the load obtained when the flywheel 400 is driven to rotate is represented by the resistance value when the user steps on the stepping device, the larger the load obtained when the flywheel 400 is driven to rotate is, the larger the resistance value when the user steps on the stepping device is, and accordingly, the smaller the load obtained when the flywheel 400 is driven to rotate is, the smaller the resistance value when the user steps on the stepping device is.

To meet the user's different demands on the load of the flywheel 400 of the exercise machine, the inner magnetic control device 100 of the present utility model is configured to be able to adjust the relative positions of the magnet wires and the flywheel 400 such that the more the magnet wires of the inner magnetic control device 100 are positioned closer to the flywheel 400, the more the flywheel 400 cuts the magnet wires of the inner magnetic control device 100 when driven to rotate, and correspondingly the less the magnet wires of the inner magnetic control device 100 are positioned farther from the flywheel 400, the more the flywheel 400 cuts the magnet wires of the inner magnetic control device 100 when driven to rotate. Thus, by adjusting the relative positions of the magnetic induction lines of the inner magnetic control device 100 and the flywheel 400, the resistance value of the user when stepping on the stepping device can be adjusted.

Referring specifically to fig. 1-5, the internal magnetic control device 100 includes a magnetic control housing 10, a drive unit 20, at least one swing arm 30, and at least one set of magnetic elements 40. The magnetron housing 10 has a housing space 101 and a peripheral opening 102 communicating with the housing space 101. The driving unit 20 is provided to the housing space 101 of the magnetron housing 10 for providing a driving force. The swing arm 30 has a pivot end 31 and a driven end 32 corresponding to the pivot end 31, the pivot end 31 of the swing arm 30 is rotatably mounted to the magnetron housing 10, the driven end 32 of the swing arm 30 is drivably connected to the driving unit 20, so that the swing arm 30 is swingably disposed at the peripheral opening 102 of the magnetron housing 10. The magnetic element 40 is disposed on the swing arm 30 to allow the magnetic element 40 to provide a magnetic field environment at the peripheral opening 102 of the magnetron housing 10. The flywheel 400 can surround the outside of the magnetic control housing 10 of the inner magnetic control device 100, and the peripheral opening 102 of the magnetic control housing 10 corresponds to the inside of the flywheel 400, such that the inner magnetic control device 100 and the flywheel 400 form a flywheel assembly. When the flywheel 400 is driven to rotate relative to the inner magnetic control device 100, the flywheel 400 is able to cut the magnetic induction lines of the magnetic element 40 of the inner magnetic control device 100 to obtain a load.

In this particular example of the internal magnetic control device 100 of the present utility model shown in fig. 1 to 5, the internal magnetic control device 100 comprises two swing arms 30, each swing arm 30 being respectively provided with a set of the magnetic elements 40, wherein the pivoting ends 31 of the two swing arms 30 are respectively rotatably mounted to the edge of the magnetic control housing 10, the driven ends 32 of the two swing arms 30 are respectively drivably connected to the driving unit 20, and the two swing arms 30 are arranged in central symmetry. When the flywheel 400 is driven to rotate relative to the inner magnetic control device 100, the flywheel 400 is able to cut the magnetic induction lines of each set of the magnetic elements 40 of the inner magnetic control device 100 to obtain a load.

Alternatively, in other specific examples of the internal magnetic control device 100 of the present utility model, the internal magnetic control device 100 may include three or more swing arms 30 and three or more sets of the magnetic elements 40, each swing arm 30 being provided with one set of the magnetic elements 40, respectively, and the swing arms 30 being arranged in central symmetry.

Preferably, with continued reference to fig. 1 to 5, the outer side of each swing arm 30 faces the peripheral opening 102 of the magnetron housing 10, and each set of the magnetic elements 40 is disposed on the outer side of each swing arm 30, so that each set of the magnetic elements 40 can be directly exposed to the peripheral opening 102 of the magnetron housing 10 to improve magnetic utilization.

It should be noted that the manner in which the magnetic element 40 is disposed on the swing arm 30 is not limited in the internal magnetic control device 100 of the present utility model, as long as the magnetic element 40 can be reliably disposed on the swing arm 30. For example, in one preferred example of the internal magnetic control device 100 of the present utility model, the magnetic element 40 may be provided to the swing arm 30 by means of glue bonding, and in another preferred example of the internal magnetic control device 100 of the present utility model, the magnetic element 40 may be provided to the swing arm 30 by means of embedding.

It should be noted that the number of magnetic elements 40 in each set of magnetic elements 40 is not limited in the internal magnetic control device 100 of the present utility model. For example, in this particular example of the internal magnetic control device 100 shown in FIGS. 1-5, the number of magnetic elements 40 in each set of magnetic elements 40 is three, which are disposed outside of the swing arm 30 in spaced relation to each other.

Preferably, the swing arm 30 extends between the pivot end 31 and the driven end 32 in a curved manner so that the swing arm 30 has a cambered surface shape, and thus the shape of the outer side of the swing arm 30 is substantially the same as the shape of the peripheral edge of the magnetic control housing 10. Preferably, a set of the magnetic elements 40 is of a cambered surface type, and the shape of the inner side of the set of the magnetic elements 40 is identical to the shape of the outer side of the swing arm 30, so that the set of the magnetic elements 40 is reliably disposed on the outer side of the swing arm 30.

Referring to fig. 2A to 5, the magnetic control housing 10 includes a disk-shaped first housing 11 and a disk-shaped second housing 12, the first housing 11 is provided with a first ring 111, the second housing 12 is provided with a second ring 121, wherein the first housing 11 and the second housing 12 are mounted to each other in such a manner that the first ring 111 and the second ring 121 correspond to each other, so that the housing space 101 of the magnetic control housing 10 is formed inside the first ring 111 and the second ring 121, and the peripheral opening 102 of the magnetic control housing 10 is formed outside the first ring 111 and the second ring 121.

Further, the edge of the first housing 11 is provided with a plurality of first mounting posts 112, the edge of the second housing 12 is provided with a plurality of second mounting posts 122, and each of the first mounting posts 112 of the first housing 11 and each of the second mounting posts 122 of the second housing 12 are mounted and supported with each other to avoid deformation of the edge of the first housing 11 and the edge of the second housing 12. Preferably, screws are allowed to lock the first housing 11 and the second housing 12 at the positions of the first mounting posts 112 of the first housing 11 and the second mounting posts 122 of the second housing 12.

Opposite sides of the pivoting end 31 of the swing arm 30 are rotatably mounted to the edge of the first housing 11 and the edge of the second housing 12, respectively, to rotatably mount the pivoting end 31 of the swing arm 30 to the edge of the magnetron housing 10, and the swing arm 30 is allowed to swing at the peripheral opening 102 of the magnetron housing 10, and each of the first mounting posts 112 of the first housing 11 and each of the second mounting posts 122 of the second housing 12 are located outside the swing arm 30 to limit the amplitude of outward swing of the swing arm 30. Preferably, the first mounting post 112 of the first housing 11 and the second mounting post 122 of the second housing 12 correspond to a gap between two adjacent magnetic elements 40 in a set of the magnetic elements 40 to avoid the magnetic elements 40.

Referring to fig. 2A and 2B, the magnetron housing 10 further has a center hole 103, and a middle portion of a mounting shaft can be mounted to the center hole 103 of the magnetron housing 10, and opposite ends of the mounting shaft protrude outside the first housing 11 and outside the second housing 12, respectively. The flywheel 400 is rotatably mounted to the mounting shaft such that the mounting shaft rotatably surrounds the flywheel 400 outside of the inner magnetic control device 100 such that the inner magnetic control device 100 and the flywheel 400 form the flywheel assembly. It will be appreciated that the opposite ends of the mounting shaft can be mounted to the equipment rack to mount the internal magnetic control device 100 to the equipment rack.

When the user steps on the stepping device of the exercise apparatus to drive the flywheel 400 to rotate relative to the inner magnetic control device 100, the flywheel 400 can cut the magnetic induction lines of each set of the magnetic elements 40 of the inner magnetic control device 100 to obtain a load, so that the user can achieve the exercise purpose through the exercise apparatus.

When the driving unit 20 drives each swing arm 30 to swing relative to the magnetic control housing 10, each set of swing arms 30 can respectively drive each set of magnetic elements 40 to swing synchronously, so as to change the relative distance between each set of magnetic elements 40 and the flywheel 400, thus adjusting the relative distance between the magnetic induction line of the internal magnetic control device 100 and the flywheel 400, thereby adjusting the load obtained when the flywheel 400 is driven to swing, and further adjusting the resistance value when the user steps on the stepping device.

For example, referring to fig. 5, when the driving unit 20 drives each of the swing arms 30 to swing outward to a maximum swing position, the relative distance between each of the magnetic elements 40 and the flywheel 400 is adjusted to a design minimum value, at which time the flywheel 400 is driven to rotate to cut the magnetic induction lines of each of the magnetic elements 40 by the maximum amount, and the flywheel 400 is able to obtain the maximum resistance value, and accordingly, when the driving unit 20 drives each of the swing arms 30 to swing inward to a minimum swing position, the relative distance between each of the magnetic elements 40 and the flywheel 400 is adjusted to the design maximum value, at which time the flywheel 400 is driven to rotate to cut the magnetic induction lines of each of the magnetic elements 40 by the minimum amount, and the flywheel 400 is able to obtain the minimum resistance value.

It will be appreciated that, in the course of the driving unit 20 driving each of the swing arms 30 to swing from the minimum swing position to the maximum swing position, respectively, the amount of magnetic induction lines of the flywheel 400 cutting each set of the magnetic elements 40 when driven to rotate gradually increases, so that the resistance value that the flywheel 400 can obtain when driven to rotate gradually increases. Accordingly, in the course of the driving unit 20 driving each of the swing arms 30 to swing from the maximum swing position to the minimum swing position, respectively, the amount of magnetic induction lines of the flywheel 400 cutting each set of the magnetic elements 40 when driven to rotate is gradually reduced, so that the resistance that the flywheel 400 can obtain when driven to rotate is gradually reduced.

With continued reference to fig. 3-5, the drive unit 20 comprises a drive mechanism 21, a linkage mechanism 22 and at least one drive arm 23, wherein the drive mechanism 21 is disposed at the magnetron housing 10, wherein the linkage mechanism 22 is drivably connected to the drive mechanism 21, and the linkage mechanism 22 comprises a linkage member 221 and at least one linkage arm 222 integrally extending outwardly from the linkage member 221, the linkage member 221 being configured to be rotatable about the central bore 103 of the magnetron housing 10 and drivably connected to the drive mechanism 21, wherein opposite ends of the drive arm 23 are rotatably mounted to the free end of the linkage arm 222 (i.e., the end of the linkage arm 222 remote from the linkage member 221) and the driven end 32 of the swing arm 30, respectively. With the above-mentioned structure, when the driving mechanism 21 drives the linkage mechanism 22 to rotate the linkage element 221 around the central through hole 103 of the magnetic control housing 10, the linkage arm 222 enables the driving arm 23 to apply a force to the swing arm 30 at a larger angle to drive the swing arm 30 to drive the magnetic element 40 to swing relative to the magnetic control housing 10, so that, on one hand, the internal magnetic control device 100 of the present utility model can reduce the requirement for the driving force of the driving mechanism 21 to facilitate reducing the cost of the internal magnetic control device 100, and on the other hand, the linkage arm 222 enables the driving arm 23 to apply a force to the swing arm 30 at an angle approaching 90 °, which not only can improve the utilization rate of the power output by the driving mechanism 21, but also can solve the problem of easy "locking" of the linkage components of the internal magnetic control device 100.

Specifically, referring to fig. 5, by rotatably mounting the driving arm 23 to the free end of the interlock arm 222, the connection line between the driven end 32 of the swing arm 30 and the rotation axis of the driving arm 23 and the rotation axis of the pivot end 31 of the swing arm 30 and the rotation axis of the magnetron housing 10 and the connection line between the driven end 32 of the swing arm 30 and the rotation axis of the driving arm 23 and the rotation axis of the free end of the interlock arm 222 form a larger angle, which is approximately 90 °, so that when the driving mechanism 21 drives the interlock mechanism 22 to rotate the interlock element 221 around the center through hole 103 of the magnetron housing 10, the interlock arm 222 enables the driving arm 23 to apply a force to the swing arm 30 at an angle approximately 90 °, thereby enabling the driving unit 20 to smoothly drive the swing arm 30 to swing in a larger range, so as to improve the reliability of the internal magnetic control device 100.

In this particular example of the internal magnetic control device 100 of the present utility model, the interlocking mechanism 22 includes two interlocking arms 222, the two interlocking arms 222 symmetrically integrally extend outward from opposite sides of the interlocking element 221, and accordingly, the number of the driving arms 23 is two, opposite ends of one driving arm 23 are rotatably mounted to the free end of one interlocking arm 222 and the driven end 32 of one swinging arm 30, respectively, and opposite ends of the other driving arm 23 are rotatably mounted to the free end of the other interlocking arm 222 and the driven end 32 of the other swinging arm 30, respectively. When the driving mechanism 21 drives the linkage element 221 to rotate around the central through hole 103 of the magnetic control housing 10, the two linkage arms 222 respectively force the two driving arms 23 to the two swing arms 30 at a larger angle, so as to drive the two swing arms 30 to drive the two groups of magnetic elements 40 to swing relative to the magnetic control housing 10.

It should be noted that the manner in which the drive arm 23 is rotatably mounted to the driven end 32 of the swing arm 30 is not limited in the internal magnetic control device 100 of the present utility model. For example, in this particular example of the internal magnetic control device 100 shown in fig. 1-5, the internal magnetic control device 100 further includes two assemblies 50, wherein the drive arm 23 is rotatably mounted to the assemblies 50, the assemblies 50 being mounted to the driven end 32 of the swing arm 30, such that the drive arm 23 is rotatably mounted to the driven end 32 of the swing arm 30. Preferably, in this specific example of the internal magnetic control device 100 of the present utility model, referring to fig. 4A, 4B and 5, the linking member 221 is ring-shaped, having a circular fitting hole 2211, wherein the second housing 12 of the magnetic control housing 10 has a cylindrical boss 124, the boss 124 surrounds the central through hole 103 of the magnetic control housing 10, wherein the linking member 221 is fitted around the boss 124 of the second housing 12 such that the boss 124 of the second housing 12 extends to the fitting hole 2211 of the linking member 221, and an outer wall of the boss 124 of the second housing 12 and an inner wall of the linking member 221 for forming the fitting hole 2211 are fitted to each other to be rotatably mounted to the magnetic control housing 10 and allow the linking member 221 to rotate around the central through hole 103 of the magnetic control housing 10. By allowing the outer wall of the boss 124 of the second housing 12 and the inner wall of the linking member 221 for forming the fitting hole 2211 to be fitted to each other, when the linking mechanism 22 is driven to rotate the linking member 221 around the center through hole 103 of the magnetic control housing 10, the linking member 221 can be prevented from swinging, thereby reducing noise and ensuring reliability of the internal magnetic control device 100.

Further, with continued reference to fig. 1 to 5, one of the linkage arms 222 of the linkage mechanism 22 is drivably connected to the driving mechanism 21 to allow the driving mechanism 21 to rotate the linkage element 221 around the central through hole 103 of the magnetron housing 10 by driving the linkage arm 222 to swing, thereby driving the other linkage arm 222 to swing in opposite directions, so that the two swing arms 30 can be synchronously driven to swing with respect to the magnetron housing 10. Compared with the mode that the driving mechanism 21 directly drives the linkage element 221 to rotate, the internal magnetic control device 100 of the present utility model can improve the utilization rate of the power output by the driving mechanism 21 by directly driving one of the linkage arms 222 to swing and drive the linkage element 221 to rotate.

With continued reference to fig. 3-5, the drive mechanism 21 includes a drive portion 211, a set of drive gears 212, and an arcuate drive member 213. The driving part 211 is mounted on the magnetic control housing 10, wherein the driving part 211 has an output shaft 2111, and the driving part 211 outputs power to provide driving force in a manner that the output shaft 2111 rotates, for example, the driving part 211 may be a driving motor, and the output shaft 2111 may be a worm. A set of the drive gears 212 are rotatably mounted to the magnetron housing 10, respectively, and one of the drive gears 212 of the set of the drive gears 212 is engaged with the output shaft 2111 of the drive portion 211. The drive element 213 is slidably mounted to the magnetron housing 10, wherein the drive element 213 has a row of driven teeth 2131, one of the drive gears 212 of a set of the drive gears 212 being meshed with the driven teeth 2131 of the drive element 213. The free end of one of the linkage arms 222 of the linkage mechanism 22 is rotatably mounted to the driving element 213.

When the driving part 211 provides driving force in a manner that the output shaft 2111 of the driving part 211 rotates, the driving force provided by the driving part 211 is transmitted to the driving element 213 through a group of driving gears 212, so that the driving element 213 slides relative to the magnetron housing 10, the driving element 213 can drive the linkage element 221 of the linkage mechanism 22 to rotate around the center through hole 103 of the magnetron housing 10 when being driven to slide relative to the magnetron housing 10, and the linkage mechanism 22 allows the driving arm 23 to easily pull or push the swing arm 30 to swing at a larger angle due to a larger angle formed by an extending direction of a connecting line between the center of the pivot end 31 of the swing arm 30 and the center of the driven end 32 and the extending direction of the driving arm 23.

Further, referring to fig. 4A and 4B, the second housing 12 of the magnetic control housing 10 has an arc-shaped guide rail 123, the driving element 213 has an arc-shaped rail groove 2132, wherein the guide rail 123 of the second housing 12 is held in the rail groove 2132 of the driving element 213 to allow the driving element 213 to ride on the guide rail 123 of the second housing 12, such that the driving element 213 is slidably mounted to the magnetic control housing 10.

In other words, when the driving part 211 provides a driving force to the driving element 213 through the set of driving gears 212, the guide rail 123 of the second housing 12 and the rail groove 2132 of the driving element 213 cooperate with each other to guide the sliding direction of the driving element 213, thereby improving the reliability of the internal magnetic control device 100.

Referring to fig. 5, in this specific example of the internal magnetic control device 100 of the present utility model, the connection position of the interlocking arm 222 of the interlocking mechanism 22 and the driving element 213 of the driving mechanism 21 is adjacent to the connection position of the driving arm 23 and the interlocking arm 222. In this particular example of the internal magnetic control device 100 of the present utility model shown in fig. 6, the connection position of the interlock arm 222 of the interlock mechanism 22 and the drive element 213 of the drive mechanism 21 coincides with the connection position of the drive arm 23 and the interlock arm 222. With continued reference to fig. 1 to 5, the internal magnetic control device 100 further includes a potential control unit 60, where the potential control unit 60 includes a rotary potentiometer 61 and a driven gear 62 sleeved on a rotating shaft of the rotary potentiometer 61, and the rotary potentiometer 61 is held in the housing space 101 of the magnetic control housing 10. The driving element 213 has a row of driving teeth 2133, and the driving teeth 2133 of the driving element 213 mesh with the driven gear 62 of the potential control unit 60. When the driving part 211 drives the driving element 213 to slide relative to the magnetic control housing 10 through the driving gear 212, the driving element 213 drives the rotating shaft of the rotary potentiometer 61 to rotate, so as to change the resistance value of the rotary potentiometer 61.

It will be appreciated that the resistance of the rotary potentiometer 61 is related to the rotation angle of the interlocking element 221 of the interlocking mechanism 22 around the central through hole 103 of the magnetron housing 10, and the rotation angle of the interlocking element 221 of the interlocking mechanism 22 around the central through hole 103 of the magnetron housing 10 determines the position of the magnetic element 40 and thus the load of the flywheel 400 when driven to rotate. In other words, the position of the magnetic element 40 of the internal magnetic control device 100 of the present utility model and the load of the flywheel 400 when driven to rotate can be determined by detecting the resistance value of the rotary potentiometer 61 of the potential control unit 60.

Preferably, the driven teeth 2131 and 2133 of the driving element 213 of the driving mechanism 21 are located on two sides of one of the linkage arms 222 of the linkage mechanism 22, respectively, such that a set of the driving gears 212 and the potential control unit 60 of the driving mechanism 21 can be located on two sides of one of the linkage arms 222 of the linkage mechanism 22, respectively, to optimize the structure of the internal magnetic control device 100.

With continued reference to fig. 1-5, the internal magnetic control device 100 further includes a circuit board 70, the circuit board 70 being fixedly mounted to the first housing 11 or the second housing 12 of the magnetic control housing 10, and the circuit board 70 being held in the housing space 101 of the magnetic control housing 10, wherein the driving part 211 and the rotary potentiometer 61 are electrically connected to the circuit board 70, respectively.

The internal magnetic control device 100 shown in fig. 7 to 9 is different from the internal magnetic control device 100 shown in fig. 1 to 5 in the specific structure of the driving unit 20.

Specifically, the driving unit 20 includes a driving mechanism 21, a linkage mechanism 22, and two driving arms 23. The interlocking mechanism 21 includes an interlocking member 221, an interlocking arm 222, and a movable arm 223, wherein the interlocking member 221 is provided to be rotatable around the center through hole 103 of the magnetron housing 10, wherein the interlocking arm 222 integrally extends outward from the interlocking member 221, wherein one end portion of the movable arm 223 is rotatably mounted to the interlocking member 221, and the movable arm 223 is drivably connected to the driving mechanism 21. Opposite ends of one of the driving arms 23 are rotatably mounted to the free end of the link arm 222 and the driven end 32 of one of the swing arms 30, respectively, and opposite ends of the other driving arm 23 are rotatably mounted to the other end of the movable arm 223 and the driven end 32 of the other swing arm 30, respectively. With such a structure, when the driving mechanism 21 drives the movable arm 223 of the linkage mechanism 22 to swing, on one hand, the movable arm 223 can apply a force to one swing arm 30 with a larger angle to drive the swing arm 30 to drive one set of magnetic elements 40 to swing relative to the magnetic control housing 10, on the other hand, the movable arm 223 can drive the linkage element 221 to rotate around the central through hole 103 of the magnetic control housing 10, so as to allow the driving arm 23 connected to the linkage arm 222 to apply a force to the other swing arm 30 with a larger angle to drive the swing arm 30 to drive one set of magnetic elements 40 to swing relative to the magnetic control housing 10, so that, on the one hand, the inner magnetic control device 100 of the present utility model can reduce the requirement of the driving force of the driving mechanism 21 to be beneficial to reduce the cost of the inner magnetic control device 100, on the other hand, the linkage arm 222 can enable the driving arm 23 to apply a force to the other swing arm 30 with an angle approaching 90 °, and can not improve the power output of the driving mechanism 21 and can easily solve the problem of the magnetic control device 100.

Preferably, in this specific example of the internal magnetic control device 100 shown in fig. 7 to 9, the linking member 221 is ring-shaped, and the linking member 221 is rotatably installed to the magnetic control housing 10 in such a manner that a central axis of the linking member 221 coincides with a central axis of the central through hole 103 of the magnetic control housing 10.

It should be noted that the manner in which the drive arm 23 is rotatably mounted to the driven end 32 of the swing arm 30 is not limited in the internal magnetic control device 100 of the present utility model. For example, in this particular example of the internal magnetic control device 100 shown in fig. 7-9, the internal magnetic control device 100 further includes two assemblies 50, wherein the drive arm 23 is rotatably mounted to the assemblies 50, the assemblies 50 being mounted to the driven end 32 of the swing arm 30, such that the drive arm 23 is rotatably mounted to the driven end 32 of the swing arm 30.

With continued reference to fig. 7-9, the drive mechanism 21 includes a drive portion 211, a set of drive gears 212, and a drive element 213. The driving part 211 is mounted on the magnetic control housing 10, wherein the driving part 211 has an output shaft 2111, and the driving part 211 outputs power to provide driving force in a manner that the output shaft 2111 rotates, for example, the driving part 211 may be a driving motor. A set of the drive gears 212 are rotatably mounted to the magnetron housing 10, respectively, and one gear of the set of the drive gears 212 is engaged with the output shaft 2111 of the drive portion 211. The drive element 213 comprises a screw shaft 2134 and a screw shaft seat 2135 which is arranged on the screw shaft 2134 in a driving manner, wherein the screw shaft 2134 is rotatably mounted on the magnetic control housing 10, the screw shaft 2134 has a shaft tooth 21341, and the shaft tooth 21341 of the screw shaft 2134 is meshed with one of a set of drive gears 212. The movable arm 223 of the interlock mechanism 22 is slidably connected to the screw base 2135 of the drive element 213.

When the driving portion 211 provides driving force in a manner that the output shaft 2111 of the driving portion 211 rotates, the driving force provided by the driving portion 211 is transmitted to the screw shaft 2134 of the driving element 213 through a set of driving gears 212, so that the screw shaft 2134 rotates relative to the magnetic control housing 10, at this time, the screw base 2135 is driven to slide along the screw shaft 2134, the screw base 2135 can slide relative to the movable arm 223 of the linkage mechanism 22 when being driven to slide along the screw shaft 2134, so as to drive the movable arm 223 to swing, and during the swinging process, the movable arm 223 can apply a force to one swing arm 30 at a larger angle, so as to drive the swing arm 30 to swing one set of magnetic elements 40 relative to the magnetic control housing 10, and on the other hand, the movable arm 223 can drive the linkage element 221 to rotate around the center through hole 103 of the magnetic control housing 10, so as to allow the other swing arm 23 connected to drive the other swing arm 30 at a larger angle relative to the swing arm 30, so as to drive the other swing arm 23 to swing the magnetic control housing 30.

Further, the screw base 2135 of the driving element 213 has a protrusion 21351, the movable arm 223 has a sliding groove 2231, the sliding groove 2231 extends along the length direction of the movable arm 223, wherein the protrusion 21351 of the screw base 2135 of the driving element 213 protrudes into the sliding groove 2231 of the movable arm 223, and the protrusion 21351 of the screw base 2135 of the driving element 213 can slide along the sliding groove 2231 of the movable arm 223 to drive the movable arm 223 to swing when the screw base 2135 is driven to slide along the screw shaft 2134. Preferably, the sliding groove 2231 of the movable arm 223 is a through groove so that the protrusion 21351 of the screw seat 2135 of the driving element 213 and the sliding groove 2231 of the movable arm 223 cooperate with each other.

Further, referring to fig. 8A and 9, the potential control unit 60 includes a sliding potentiometer 63, the sliding potentiometer 63 further includes a fixed portion 631 and a sliding portion 632 slidably provided to the fixed portion 631, the fixed portion 631 is fixedly provided to the magnetic control housing 10, the sliding portion 632 is mounted to a connection position of the linkage member 221 and the movable arm 223, such that when the driving section 211 drives the movable arm 223 to swing and drive the linkage member 221 to rotate through a set of the driving gear 212 and the driving member 213, the sliding portion 632 generates sliding with respect to the fixed portion 631 to change a resistance value of the sliding potentiometer 63. Preferably, the demarcation potentiometer 63 may be a sliding resistor.

It will be appreciated that the resistance of the sliding potentiometer 63 is related to the rotation angle of the interlocking element 221 of the interlocking mechanism 22 around the central through hole 103 of the magnetron housing 10, and the rotation angle of the interlocking element 221 of the interlocking mechanism 22 around the central through hole 103 of the magnetron housing 10 determines the position of the magnetic element 40 and thus the load of the flywheel 400 when driven to rotate. In other words, the position of the magnetic element 40 of the internal magnetic control device 100 of the present utility model and the load of the flywheel 400 when driven to rotate can be determined by detecting the resistance value of the sliding potentiometer 63.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.

Claims (15)

1. An internal magnetic control device, comprising:

a magnetic control shell with a central perforation;

At least one set of magnetic elements;

at least one swing arm having a pivoting end and a driven end corresponding to the pivoting end, wherein the pivoting end of the swing arm is rotatably mounted to an edge of the magnetic control housing, and a set of the magnetic elements are disposed outside the swing arm; and

a drive unit comprising a drive mechanism, a linkage mechanism and at least one drive arm, wherein the drive mechanism is mounted to the magnetron housing, wherein the linkage mechanism is drivably connected to the drive mechanism, and the linkage mechanism further comprises a linkage element and at least one linkage arm integrally extending outwardly from the linkage element, the linkage element being configured to be rotatable about the central aperture of the magnetron housing, wherein opposite ends of the drive arm are rotatably mounted to the driven end of the swing arm and an end of the linkage arm remote from the linkage element, respectively.

2. The internal magnetic control device according to claim 1, wherein the internal magnetic control device comprises two sets of the magnetic elements and two swing arms, one set of the magnetic elements is provided on each of the outer sides of each swing arm, and the two swing arms are provided in a center symmetrical manner, wherein the interlocking mechanism comprises two interlocking arms integrally extended outward from opposite sides of the interlocking element in a symmetrical manner, and the driving unit comprises two driving arms, respectively, opposite ends of one driving arm are rotatably mounted to the driven end of one swing arm and an end of the other driving arm away from the interlocking element, respectively, and opposite ends of the other driving arm are rotatably mounted to the driven end of the other swing arm and an end of the other interlocking arm away from the interlocking element, respectively.

3. The internal magnetic control device according to claim 2, wherein one of the two linkage arms of the linkage mechanism is drivably mounted to the drive mechanism.

4. The internal magnetic control device of claim 3, wherein the drive mechanism comprises a drive portion, an arcuate drive element, and a set of drive gears, wherein the drive portion is fixedly mounted to the magnetic control housing, the drive element is slidably mounted to the magnetic control housing, each gear of the set of drive gears is rotatably mounted to the magnetic control housing, and one gear of the set of drive gears is engaged to the worm of the drive portion, one gear of the set of drive gears is engaged to the driven tooth of the drive element, wherein the interlock arm is rotatably mounted to the drive element.

5. The internal magnetic control device of claim 4, wherein the magnetic control housing has an arcuate guide track and the drive element has an arcuate track slot, the guide track of the magnetic control housing extending to the track slot of the drive element to allow the drive element to ride on the guide track of the magnetic control housing such that the drive element is slidably mounted to the magnetic control housing.

6. The internal magnetic control device of claim 4, wherein a connection location of the linkage arm and the drive element is adjacent to a connection location of the driven ends of the linkage arm and the swing arm.

7. The internal magnetic control device of claim 4, wherein a connection location of the linkage arm and the drive element coincides with a connection location of the driven ends of the linkage arm and the swing arm.

8. The internal magnetic control device according to any one of claims 4 to 7, further comprising a potential control unit comprising a rotary potentiometer and a driven gear mounted around the rotary potentiometer, the driven gear being rotatably mounted to the magnetic control housing and the drive teeth engaged to the drive element.

9. Flywheel assembly, characterized in that it comprises:

the internal magnetic control device according to any one of claims 1 to 8; and

a flywheel, wherein the flywheel is disposed around the outside of the inner magnetic control device.

10. Exercise equipment, its characterized in that includes:

a machine frame;

a treading device;

a flywheel; and

the internal magnetic control device according to any one of claims 1 to 8, wherein the internal magnetic control device is mounted to the equipment rack, the tread device is tread-mounted to the equipment rack, the flywheel is rotatably mounted to the equipment rack and is drivably connected to the tread device, and the flywheel is disposed around an outside of the internal magnetic control device.

11. An internal magnetic control device, comprising:

a magnetic control shell with a central perforation;

two sets of magnetic elements;

the two swing arms are respectively provided with a pivoting end and a driven end corresponding to the pivoting end, the pivoting ends of the two swing arms are respectively rotatably arranged at the edge of the magnetic control shell, and the two swing arms are arranged in a central symmetry manner, wherein a group of magnetic elements are respectively arranged at the outer side of each swing arm;

a drive unit, further comprising:

a driving mechanism mounted to the magnetic control housing;

a linkage mechanism including a linkage member configured to be rotatable about the center through hole of the magnetic control housing, a linkage arm integrally extending outwardly from the linkage member, one end portion of the linkage arm being rotatably mounted to the linkage member, and a middle portion of the linkage arm being drivably connected to the driving mechanism; and

the two driving arms, wherein the opposite ends of one driving arm are respectively rotatably arranged at the driven end of one swinging arm and the end part of the connecting arm far away from the connecting element, and the opposite ends of the other driving arm are respectively rotatably arranged at the driven end of the other swinging arm and the end part of the movable arm far away from the connecting element.

12. The internal magnetic control device according to claim 11, wherein the drive mechanism further comprises a drive portion, a drive element and a set of drive gears, wherein the drive portion is fixedly mounted to the magnetic control housing, the drive element comprises a screw shaft and a screw mount drivingly disposed to the screw shaft, the screw shaft is rotatably mounted to the magnetic control housing, the movable arm is slidably connected to the screw mount, each gear of a set of the drive gears is rotatably mounted to the magnetic control housing, and one gear of a set of the drive gears is engaged to a worm of the drive portion, and one end of the screw shaft is engaged to one gear of a set of the drive gears.

13. The internal magnetic control device according to claim 12, wherein the screw mount has a protrusion, the movable arm has a runner that extends along a length of the movable arm, wherein the protrusion of the screw mount protrudes into the runner of the movable arm, and the protrusion of the screw mount is allowed to slide along the runner of the movable arm.

14. The internal magnetic control device according to any one of claims 11 to 13, further comprising a potential control unit including a sliding potentiometer further including a fixed portion fixedly provided to the magnetic control housing and a sliding portion slidably provided to the fixed portion, the sliding portion being mounted at a connection position of the linking member and the movable arm.

15. Flywheel assembly, characterized in that it comprises:

the internal magnetic control device according to any one of claims 11 to 14; and

a flywheel, wherein the flywheel is disposed around the outside of the inner magnetic control device.