AU2022474261B2

AU2022474261B2 - Standing squat calf raise

Info

Publication number: AU2022474261B2
Application number: AU2022474261A
Authority: AU
Inventors: Hyun Jung Byun
Original assignee: Newtech Wellness Co Ltd
Current assignee: Newtech Wellness Co Ltd
Priority date: 2022-08-08
Filing date: 2022-12-13
Publication date: 2026-04-02
Anticipated expiration: 2042-12-13
Also published as: US12337204B2; AU2022474261A1; EP4342550A1; US20240042261A1; CA3209860A1; EP4342550A4; CN117858743B; EP4342550B1; CN117858743A

Abstract

A standing squat calf raise according to an embodiment of the present invention, allowing a user to lift or lower a weight towards the floor while stepping thereon, comprising: a frame portion seated on the floor and forming an installation space with a plurality of frames; a weight applying portion which is connected to the frame portion to be rotatable and applies weight in the direction toward the floor; a footstep portion formed on the front lower portion of the frame portion so as to provide a space where the user steps on; and a movable holding portion which mediates the weight applying portion and the frame portion and allows the weight applying portion to be held at a certain height, wherein the footstep portion has one rear side end having variable height so that the inclination angle of a stepping surface on which the user steps can be changed.

Description

Standing Squat Calf Raise

Technical Field The present invention relates to a standing squat calf raise, and more specifically, a standing squat calf raise machine in which a user can perform an action of lifting or lowering a load toward a floor surface while placing their feet flat on the floor. 2022474261

Background Art A calf raise is an exercise that works the calves through the process of weight training.

Generally, it is most desirable to move up and down as widely as possible, while standing on the balls of the feet on a place like a staircase. However, if there is not sufficient time, it can be a short exercise that is still effective. The idea is to have as much wide range of motion as possible.

The motion is initiated in a squatting position while lifting and lowering the tips of the toes, keeping the back up as high as possible and continuing to hold this position with the use of the buttocks while pushing the latissimus dorsi muscles and keeping the hips supported.

The weight of a barbell or dumbbell should be light compared to those used when squatting. The body may tremble and it may be difficult to keep the center of gravity compared to performing normal squats. Thus, if there is a need to adapt to the calf raise posture from the very beginning, it is recommended that the Smith machine be used.

The advantage of this exercise is that it can be performed anywhere where it is possible to stand. If the range of motion and exercise speed are reduced, the exercise can be performed without standing out too much in public and without looking strange to others. In addition, as the effect of the exercise will vary depending on the posture used, many variations exist due to its simplicity.

Summary of Invention In one aspect of the present disclosure, there is provided a standing squat calf raise machine with which a user can perform a motion of lifting or lowering a load toward a floor surface while standing on their feet comprises, a frame unit forming a mounting space using a plurality of frames while disposed on the floor;

a load application unit rotatably connected to the frame unit and applying a load in a direction of the floor surface; a stool unit formed on a lower part of a front side of the frame unit to provide a surface for the user to step on; an operational rotation unit mediating the load application unit and the frame unit, wherein the load application unit is mounted at a certain height; and 2022474261

wherein a height of one rear end of the stool unit can be adjusted to change the inclination of the surface on which the user steps on; and wherein the stool unit further comprises, a primary stool landing unit resting on the frame unit; a secondary stool landing unit resting on the frame unit, but spaced apart from the primary stool landing unit, and forming a plurality of hanging units along a height direction; a stool support unit connected to the primary stool landing unit and connected to the secondary stool landing unit on one side, and providing a space for a user to step on; the plurality of hanging units being arranged in the order of a primary hanging part, a secondary hanging part, and a tertiary hanging part from a lower side to an upper side; a support plate unit comprising a primary support plate and a secondary support plate connected to each other and forming a certain angle; and an adjustment bar connected to one end of the secondary support plate facing the secondary stool landing unit and hanging on a holding unit, wherein the adjustment bar hangs on any one of the plurality of hanging units to allow for an inclination of the support plate unit to be changed relative to the floor surface.

Preferred embodiments of the present invention may provide a standing squat calf raise machine that can increase a user's exercise efficiency by varying the inclination of a stool where the user stands to perform an action of lifting or lowering a load toward a floor surface while placing their feet flat on the floor.

In one embodiment, the standing squat calf raise allows for an inclination of a stool where a user stands to perform an action of lifting or lowering a load toward a floor surface that can vary while placing their feet flat on the floor, and comprises, a frame unit forming a mounting space with a plurality of frames rotatably connected to the frame unit, a load application unit for applying a load in a direction of a floor space, and a stool unit that is formed on a lower part of a front side of the frame unit to provide a space for the user to step on, wherein the frame unit includes an operational

rotation unit to allow the load application unit to be held at a certain height, and wherein the stool unit may change the inclination of the surface on which the user steps on by varying the height of one side of the rear.

In another embodiment, the stool unit comprises a primary stool landing unit settled on a frame unit spaced apart from a stool support unit, a stool base frame having a secondary stool landing unit 2022474261

forming a plurality of hanging units formed along a height direction with a single side connected to the primary stool landing unit and the other side having a stool landing unit that provides a space for a user to step on while being connected to the secondary stool landing unit, wherein the plurality of hanging units are sequentially arranged in the order of a primary hanging part, a secondary hanging part, and a tertiary hanging part placed from the lower side to the upper side, wherein the stool support unit is connected to a support plate unit consisting of a primary support plate and a secondary support plate connected to each other and to one end of the secondary support plate facing the secondary stool landing part at a certain angle to be equipped with an adjustment bar hanging on a holding unit, and wherein the adjustment bar may be hanging from any one of the plurality of hanging units to allow for an inclination to be changed with respect to a floor surface of the support plate unit.

In another embodiment, a frame unit of a standing squat calf raise comprises a rectangular frame- shaped support frame supported on a floor surface, a standing frame erected upright and connected to a rear side of the support frame connected to the standing frame while mediating a mounting frame that protrudes toward a stool unit and is connected to an operational rotation unit, wherein the support frame is equipped with a reinforcing frame to reinforce a connection of the standing frame to the support frame, and wherein the reinforcing frame comprises a hanging unit protruding from outside to be formed to provide a space to hang an object.

In another embodiment, a load application unit of a standing squat calf raise comprises, while being rotatably connected to a standing frame, a main rotation unit extending to an upper side of a stool unit that is rotatably connected to the standing frame, and is disposed lower than the main rotation unit, a sub-rotation unit extending to the upper side of the stool unit and connected to the main rotation unit and equipped with a connection linkage unit to change a distance between the main rotation unit and the sub-rotation unit, wherein the main rotation unit is rotatably connected to the standing frame and one end of a main rotation bar while being connected to the load application unit composed of a parallel bar and a curved bar that is curved from the parallel bar to provide a

space for gripping and a lower side of the parallel bar and includes a buffer unit formed of a buffer material, wherein the parallel bar consists of a parallel body unit formed in a shape of a straight line and a bent unit bent from the end of the parallel body unit, wherein the buffer unit includes a main cushion unit formed in the parallel body unit to provide a cushion-like effect and an auxiliary cushion unit formed in the curved part to provide a cushion-like effect, and the sub-rotation unit includes a rotatable sub-rotation bar connected to the standing frame and a sub-mounting unit 2022474261

connected to both ends of the sub-rotation bar, and wherein the connecting linkage unit is connected to a primary rotation bar rotatably connected to the main rotation bar and to the sub-rotation bar and is equipped with a secondary rotation bar connected to the primary rotation bar in multiple steps concentrically and a height adjusting unit that determines the sliding status of the secondary rotation bar with respect to the primary rotation bar, and wherein the load application unit mediates the standing frame and the load supporting unit to guide the rotation of the main rotation unit with respect to the standing frame and further provides a guide linkage unit to reinforce the connecting structure.

In another embodiment, an operational rotation unit of a standing squat calf raise comprises, a settling rotation unit rotatably connected to a mounting frame, a mounting connection unit rotatably connected to the standing frame and providing a primary connection rotation shaft and a secondary connection rotation shaft, one side connected to the settling rotation unit and the other side connected to the primary connection rotation shaft, and a primary operational linkage unit transmitting a rotational force of the mounting connection unit to the settling rotation unit, an application rotation unit rotatably connected to a load application unit and providing a tertiary connecting rotation shaft, one side connected to the tertiary connection rotation shaft and the other side connected to the secondary connection rotation shaft, and a secondary operational linkage unit connected to the application rotation unit and transmitting a rotational force of the application rotation unit to the mounting connection unit, an application handle unit providing a space for a user to apply an external force, wherein the rotational force applied to the application handle unit is transmitted to the settling rotation unit through the application rotation unit, the secondary operational linkage unit, the mounting connection unit, and the primary operational linkage unit, and wherein the settling rotation unit, depending on the direction of the rotational force applied to the application handle unit, may be disposed on the path of movement of a sub-rotation bar to support the sub-rotation bar or may be disposed off the path of positional movement of the sub- rotation bar to prevent any movement restriction of the sub-rotation bar.

The disclosed standing squat calf raise machine may increase a user's exercise efficiency by varying the inclination of a stool where the user stands to perform an action of lifting or lowering a load toward a floor surface while placing their feet flat on the floor.

Brief Description of Drawings FIG. 1 is a schematic perspective view illustrating a standing squat calf raise according to one 2022474261

embodiment of the present invention. FIG. 2 is a schematic view illustrating a frame unit of a standing squat calf raise according to one embodiment of the present invention. FIGS. 3 and 4 are schematic views illustrating a stool unit of a standing squat calf raise according to one embodiment of the present invention. FIGS. 5 to 7 are schematic views illustrating a load application unit of a standing squat calf raise according to one embodiment of the present invention. FIGS. 8 and 9 are schematic views illustrating an operational rotation unit of a standing squat calf raise according to one embodiment of the present invention.

Detailed Description Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings below. However, the idea of the present invention is not limited to these embodiments, and those skilled in the relevant field of technology will be able to easily propose other inventions or other embodiments within the scope of the same idea by adding, changing, or deleting, or otherwise modifying other components, all of which will also be included within the scope of the idea of the present invention.

Further, components having the same function within the scope of the same idea exhibited in the drawings of each embodiment are described using the same reference numerals.

FIG. 1 is a schematic perspective view of a standing squat calf raise according to one embodiment of the present invention and FIG. 2 is a schematic view of a frame unit of a standing squat calf raise according to one embodiment of the present invention.

Referring to FIGS. 1 and 2, a standing squat calf raise (1, hereinafter referred to as calf raise) is an exercise machine in which a user can perform a motion of lifting or lowering a load toward a floor surface while standing on their feet.

The calf raise (1) of the present invention may include a frame unit (10), a load application unit (20), a stool unit (30), and an operational rotation unit (40). 2022474261

The frame unit (10) may comprise a plurality of frames forming a mounting space while being placed on a floor surface.

The frame unit (10) may comprise a support frame (11), a standing frame (13), a mounting frame (15), and a reinforcing frame (17).

The support frame (11) may be formed in a square-shaped frame supported on a floor surface and may be adjusted horizontally to be leveled with the floor based on circular support in contact with the floor surface or a load applied to the support frame (11) may be transferred to the floor.

The standing frame (13) may be connected to the rear side of the support frame (11) in an upright position and may be formed by two support plates arranged in parallel.

The mounting frame (15) may be connected to the standing frame (13) while protruding toward the stool unit (30) and may provide a space where the operational rotation unit (40) is connected/installed.

The reinforcing frame (17) may intermediate the standing frame (13) and the support frame (11) to reinforce the connection of the standing frame (13) to the support frame (11).

Specifically, the reinforcing frame (17) may be formed on both sides of the support frame (11) to support and reinforce the two support plates, respectively. Furthermore, the reinforcing frame (17) may be formed with a hanging unit (171) that protrudes from the outside to provide a space for hanging an object.

The load application unit (20) is connected to the frame unit (10) and is capable of applying a load in a direction of the floor surface. At this time, the load from the top to the bottom may be provided by a hanging weight or a resilient force created by an elastic spring or the like.

The stool unit (30) may be formed on a lower part of the front side of the frame unit (10) to provide a space for the user to step on. 2022474261

The operational rotation unit (40) may link the load application unit (20) and the frame unit (10), and allow the load application unit (20) to be mounted at a certain height.

Specifically, the operational rotation unit (40) may be disposed on a rotational path about the frame unit (10) of the load application unit (20) or may be disengaged from the path, which may be actuated by an external force applied by the user.

A detailed description of the operational rotation unit (40) will be provided with reference to FIGS. 8 and 9 below.

The stool unit (30) may have a variation in height at its rear end, such that the inclination of a surface on which the user steps is varied.

Specifically, the stool unit (30) may be formed to be inclined upward from the front of the frame unit (10) toward the rear end, but an upward angle can be changed by the user.

Depending on the change in the angle of the stool unit (30), the user must change the distribution and strength of the force for centering the body, which may allow the user to train the muscles of the regions they want to strengthen.

FIGS. 3 and 4 are schematic views of a stool unit of a standing squat calf raise according to one embodiment of the present invention.

Referring to FIGS. 3 and 4, a stool unit (30) of a calf raise (1) according to one embodiment of the present invention may include a stool frame (31) and a stool support unit (33).

The stool frame (31) may comprise a primary stool landing unit (311) on the frame unit (31) and a secondary stool landing unit (312) on the frame unit (10), but spaced apart from each other, and forming a plurality of hanging units formed along a height direction.

The stool support unit (33) may provide a space for the user to step on, with one side connected to the primary stool landing unit (311) and the other side connected to the secondary stool landing unit 2022474261

(312).

The plurality of hanging units may be arranged in the order of a primary hanging part (312a), a secondary hanging part (312b), and a tertiary hanging part (312c) from the lower side toward the upper side.

The stool support unit (33) may comprise a support plate unit (331) consisting of a primary support plate (331a) and a secondary support plate (331b) connected to each other and to one end of the secondary support plate (331b) facing the secondary stool landing unit (312) at a certain angle to be equipped with an adjustment bar (333) hanging on the hanging units.

The primary support plate (331a) is rotatable at a certain angle while it is inserted into the primary stool landing unit (311).

By arranging the primary support plate (331a) and the secondary support plate (331b) to form a certain angle, the user can maintain a more stable body balance when taking a step. Furthermore, the support plate unit (331) forms fine upward protrusions to prevent slipping, and a plurality of through-holes formed through penetration can allow for moisture or foreign substances to deviate rather than stay on the upper side.

The adjustment bar (333) may hang from any one of the hanging units to allow for inclinations of the support plate unit (331) to be changed with respect to the floor surface.

The user can adjust the upward inclination of their footing by determining the height of the adjustment bar (333) as needed.

FIG. 4(a) shows a state in which the adjustment bar (333) is engaged in the primary hanging part (312a), FIG. 4(b) shows a state in which the adjustment bar (333) is engaged in the secondary

hanging part (312b), and FIG. 4(c) shows a state in which the adjustment bar (333) is engaged in the tertiary hanging part (312c).

FIG. 5 or 7 is a schematic view of a load application unit of a standing squat calf raise according to one embodiment of the present invention. 2022474261

Referring to FIGS. 5 to 7, a load application unit (20) of a calf raise (1) according to one embodiment of the present invention may comprise a main rotating unit (21), a sub-rotating unit (23), and a connection linkage unit (25).

The main rotating unit (21) may extended to the upper side of a stool unit (30) while being connected to a standing frame (13) to be rotatable.

Specifically, the main rotating unit (21) may include a main rotation bar (211), a load support unit (213), and a buffer unit (215).

The main rotation bar (211) may be connected to the standing frame (13) to be rotatable. The load support unit (213) may comprise a parallel bar (213a), connected to one end of the main rotation bar (211), and a curved bar (213b) formed to bend from the parallel bar (213a) to provide a space for a user to grip.

The parallel bar (213a) may comprise a parallel body unit (2131) formed in a straight line and a bent portion (2133) bent from an end of the parallel body unit (2131).

The buffer unit (215), connected to a lower side of the parallel bar (213a), may be formed of a buffer material.

Specifically, the buffer unit (215) may comprise a main cushion unit (215a) formed on the parallel body unit (2131) to provide a cushion-like effect and an auxiliary cushion unit (215b) formed in the bent portion (2133) to provide a cushion-like effect.

The main cushion unit (215a) may be supported on the user's shoulders during squatting exercises, and the auxiliary cushion unit (215b) may be supported on the user's shoulders and back.

The sub-rotating unit (23) may be rotatably connected to the standing frame (13) but disposed at a lower side than the main rotating unit (21) and may extend to the upper side of the stool unit (30). Specifically, the sub-rotating unit (23) may comprise a sub-rotation bar (231) connected to the standing frame (13) to be rotatable and a sub-mounting unit (233) connected to both ends of the sub-rotation bar (231). 2022474261

The sub-mounting unit (233) may provide a space for the user to grip during a squatting exercise, and the user may simultaneously lift and lower the sub-rotating unit (23) through the sub-mounting unit (233) and lift and lower the main rotating unit (21) supported on the shoulders and back. The connection linkage unit (25) connects the main rotating unit (21) to the sub-rotating unit (23), and changes can be made to the distance between the main rotating unit (21) and the sub-rotating unit (23).

Specifically, the connection linkage unit (25) may comprise a primary rotation bar (251) rotatably connected to the main rotation bar (211), a secondary rotation bar (253) rotatably connected to the sub-rotation bar (231), a height-adjusting unit (255) for determining the sliding status of the secondary rotation bar (253) with respect to the primary rotation bar (251) and be multi-stage concentric with the primary rotation bar (251).

The secondary rotation bar (253) may slide along an inner circumferential surface of the hollow primary rotation bar (251) and may be restricted in mutual position movement by the height adjusting unit (255) when it is simultaneously inserted into the primary rotation bar (251) and the secondary rotation bar (253), or maybe free in mutual position movement when the inserted height adjusting unit (255) is released from the primary rotation bar (251).

Furthermore, the load application unit (20) may further comprise a guide linkage unit (27). The guide linkage unit (27) may guide the rotation of the main rotating unit (21) about the standing frame (13), mediate between the standing frame (13) and load support unit (213), and reinforce the connection structure.

FIGS. 8 and 9 are schematic views to show an operational rotation unit of a standing squat calf raise according to one embodiment of the present invention.

Referring to FIGS. 8 and 9, an operational rotation unit (40) of a calf raise (1) according to one embodiment of the present invention may comprise a settling rotation unit (41), a mounting connection unit (42), a primary operational linkage unit (43), an application rotation unit (44), a secondary operational linkage unit (45), and an application handle unit (46).

The settling rotation unit (41) may be connected to a mounting frame (15) to be rotatable. 2022474261

The mounting connection unit (42) may be connected to a standing frame (13) to be rotatable and provide a primary connection rotation shaft (421) and a secondary connection rotation shaft (422).

The primary operational linkage unit (43) has a single side connected to the settling rotation unit (41) and the other side may be connected to the primary connection rotation shaft (421) to allow for a rotational force of the mounting connection unit (42) to be transmitted to the settling rotation unit (41).

The application rotation unit (44) is connected to a load application unit (20) to be rotatable and may provide a tertiary connection rotation shaft (441).

The secondary operational linkage unit (45) has a single side connected to the tertiary connection rotation shaft (441) and the other side may be connected to the secondary connection rotation shaft (422) to allow for the rotational force of the mounting connection unit (42) to be transmitted to the application rotation unit (44).

The application handle unit (46) is connected to the application rotation unit (44) and may provide a space for an external force application by a user.

The rotational force applied to the application handle unit (46) can be transmitted to the settling rotation unit (41) through the application rotation unit (44), the secondary operational linkage unit (45), the mounting connection unit (42), and the primary operational linkage unit (43).

Depending on the direction of the rotational force to the application handle (46), the settling rotation unit (41) may be disposed on a position movement path of a sub-rotation bar (231) to provide support for the sub-rotation bar (231) or a positional movement of a sub-rotation bar (231) may not be restricted when it deviates from the positional movement path of the sub-rotation bar (231).

FIGS. 8 and 9 are drawings with some components removed to illustrate an operational mounting unit (40).

Referring to FIG. 8, the settling rotation unit (41) is settled on a sub-connection unit (235) formed between two sub-rotating plates that make up the sub-rotation bar (231), and in this case, positional 2022474261

movements of the load application unit (20) to the upper part may be possible, but its positional movement to the lower part may be restricted.

FIG. 8 illustrates a state of exercise standby through a calf raise (1), which allows a user to prepare for a workout while stepping on a stool unit in a lower space of a main rotation bar (211) at a specific height.

Referring to FIG. 9, an application rotation unit (44), a secondary operational linkage unit (45), a mounting connection unit (42), a primary operational linkage unit (43), and a settling rotation unit (41) are in a rotated state due to an external force applied to an application handle unit, which can be considered as a state of performing a calf raise (1) exercise.

Here, the settling rotation unit (41) is spaced apart from a sub-connection unit (235) and is not disposed on a top-and-bottom movement path of the sub-connection unit (235), which means that a positional movement of the load application unit (20) is free, allowing a user to perform squat exercises.

While the above describes the composition and features of the present invention based on embodiments of the present invention, the invention is not limited thereto, and it will be apparent to those skilled in the relevant field of technology to which the present invention belongs that various changes or modifications can be made within the spirit and scope of the present invention, and such changes or modifications fall within the scope of the appended patent claims.

Throughout this specification and the claims which follow, unless the context requires otherwise, the word “comprise”, and variations such as “comprises” and “comprising”, will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

Claims

1. A standing squat calf raise machine with which a user can perform a motion of lifting or lowering a load toward a floor surface while standing on their feet comprises, a frame unit forming a mounting space using a plurality of frames while disposed on the floor; a load application unit rotatably connected to the frame unit and applying a load in a direction of 2022474261

the floor surface; a stool unit formed on a lower part of a front side of the frame unit to provide a surface for the user to step on; an operational rotation unit mediating the load application unit and the frame unit, wherein the load application unit is mounted at a certain height; and wherein a height of one rear end of the stool unit can be adjusted to change the inclination of the surface on which the user steps on; and wherein the stool unit further comprises, a primary stool landing unit resting on the frame unit; a secondary stool landing unit resting on the frame unit, but spaced apart from the primary stool landing unit, and forming a plurality of hanging units along a height direction; a stool support unit connected to the primary stool landing unit and connected to the secondary stool landing unit on one side, and providing a space for a user to step on; the plurality of hanging units being arranged in the order of a primary hanging part, a secondary hanging part, and a tertiary hanging part from a lower side to an upper side; a support plate unit comprising a primary support plate and a secondary support plate connected to each other and forming a certain angle; and an adjustment bar connected to one end of the secondary support plate facing the secondary stool landing unit and hanging on a holding unit, wherein the adjustment bar hangs on any one of the plurality of hanging units to allow for an inclination of the support plate unit to be changed relative to the floor surface.

2. The frame unit according to Claim 1 further comprises, a rectangular frame-shaped support frame supported on the floor; a standing frame erected upright and connected to a rear side of the support frame; a mounting frame connected to the standing frame and protruding toward the stool unit, and to which the operational rotation unit is connected; a reinforcing frame interposed between the standing frame and the support frame to reinforce the connection of the standing frame to the support frame; and

the hanging unit protruding from an outer side to provide a space for hanging an object.

3. The load application unit according to Claim 2 further comprises, a main rotation unit rotatably connected to the standing frame and extending upwardly from the stool unit; a sub-rotation unit rotatably connected to the standing frame and disposed at a lower side than the 2022474261

main rotation unit, and extending to the upper side of the stool unit; a connection linkage unit connecting the main rotation unit and the sub-rotation unit, wherein a spacing distance between the main rotation unit and the sub-rotation unit is varied; and a main rotation bar rotatably connected to the standing frame; the load-bearing unit further comprises a parallel bar connected to one end of the main rotation bar and a curved bar formed to bend from the parallel bar to provide a space for the user to grip; and a buffer unit connected to a lower end of the parallel bar and formed of a buffer material, wherein the parallel bar comprising a parallel body unit is formed in a shape of a straight line and a bent unit bent from the end of the parallel body unit, and the buffer unit includes a main cushion unit formed in the parallel body unit to provide a cushion-like effect and an auxiliary cushion unit formed in the curved part to provide a cushion-like effect; and the sub-rotation unit includes a rotatable sub-rotation bar connected to the standing frame and a sub-mounting unit connected to both ends of the sub-rotation bar; and the connecting linkage unit is connected to a primary rotation bar connected to the main rotation bar; a secondary rotation bar rotatably is connected to the sub-rotation bar and has a plurality of ends concentric with the primary rotation bar; and a height adjusting unit determines a sliding status of the secondary rotation bar with respect to the primary rotation bar; and the load bearing unit further comprises a guide linkage unit that guides the rotation of the main rotation unit relative to the standing frame and intermediates between the standing frame and the load-bearing unit to reinforce the connection structure.

4. The operational rotation unit according to Claim 3 further comprises, a settling rotation unit rotatably connected to the mounting frame,

the mounting connection unit rotatably connected to the standing frame and providing a primary connection rotation shaft and a secondary connection rotation shaft; a primary operational linkage unit, wherein one side is connected to the settling rotation unit and the other side is connected to the primary connection rotation shaft to transmit a rotational force of the mounting connection unit to the settling rotation unit; the load bearing unit connected to be rotatable and an application rotation unit providing a tertiary 2022474261

connecting rotation shaft; a secondary operational linkage unit, wherein one side is connected to the tertiary connection rotation shaft and the other side is connected to the secondary connection rotation shaft to transmit the rotational force of the application rotation unit to the mounting connection unit; and connected to the application rotation unit and equipped with an application handle unit providing a space for the application of an external force by the user, wherein the rotational force applied to the application handle unit is transmitted to the settling rotation unit through the application rotation unit, the secondary operational linkage unit, the mounting connection unit, and the primary operational linkage unit, and wherein in the settling rotation unit, the sub-rotation bar is placed on the path of its movement to support a sub-rotation bar, or does not limit a positional movement of the sub-rotation bar when it deviates from a movement path of a position of the sub-rotation bar depending on the direction of a rotational force applied to the application handle unit.