Leg extension machine

Abstract

To provide a leg extension machine that enables a user to exercise by lifting a weight with movements of lifting a lever connected to the weight while being seated, and that is usable adapting not only to length of the user's leg but also with thickness of the leg.SOLUTION: A leg extension machine 1 includes: a frame part 10 standing upright while supported by a floor; a seat part 20 connected to the frame part 10, providing a space where a user can be seated, and whose standing angle and height are adjustable; an exercise rotation part 30 connected to the frame part 10, disposed adjacent to the seat part 20, provides a space where the seated user to hang his or her legs, and rotated by an external force applied by the user; a weight part 40 supported by the frame part 10 and accommodating a plurality of weights; a weight transmission part 50 which is connected to the frame part 10, mediates the exercise rotation part 30 and the weight part 40, and linked to the rotation of the exercise rotation part 30 to raise and lower the weight of the weight part 40.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a leg extension machine, and more particularly to a leg extension machine that allows a user to lift a weight by lifting a lever connected to the weight while remaining seated, and that can be used to accommodate not only the length of a user's legs but also the thickness of their legs. [Background technology]

[0002] Recently, due to the boom in self-management and obesity prevention and adult disease prevention, most people, regardless of age or gender, are enjoying a variety of exercises. The types of exercises are extremely diverse, and many people nowadays are signing up to sports gyms to exercise.

[0003] Many people go to gyms because they have a wide variety of exercise equipment and can adjust the weight load of muscle training to suit their physical condition and exercise volume. Another advantage of gyms is that they allow you to exercise regardless of the season, weather, or time.

[0004] Generally, exercise at a sports gym is broadly divided into aerobic exercise and equipment exercise, and is further divided into upper body muscle training, lower body muscle training, abdominal muscle training, etc. depending on the purpose of the exercise.

[0005] Among these, typical exercise equipment for training lower body muscles includes a leg curl machine, a leg extension machine, and an aerial walking machine.

[0006] Existing leg extension machines are inconvenient to use because they only accommodate the length of the user's legs by adjusting the position of the seating part and do not take into account various thigh thicknesses.

[0007] Therefore, research is needed into a leg extension machine that can be used to accommodate not only the length of a user's legs but also the thickness of their legs. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Registered Utility Model No. 20-0453493 Summary of the Invention [Problem to be solved by the invention]

[0009] To provide a leg extension machine that allows a user to lift a weight by lifting a lever connected to the weight while remaining seated, and that can be used to accommodate not only the length of a user's legs but also the thickness of the legs.

[0010] Another object of the present invention is to provide a leg extension machine that has a compact overall structure, which not only reduces manufacturing costs but also makes it easy to maintain and manage exercise facilities. [Means for solving the problem]

[0011] The leg extension machine according to one embodiment of the present invention includes a frame unit 10 that stands up while being supported on the floor, a seat unit 20 that is connected to the frame unit 10 and provides a space for a user to sit on and that is adjustable in terms of the angle and height of the stand, a motion rotation unit 30 that is connected to the frame unit 10 but is disposed adjacent to the seat unit 20 and provides a space for a seated user to place their feet, and that rotates when an external force is applied by the user, a weight unit 40 that is supported by the frame unit 10 and accommodates a plurality of weights, and a weight unit 40 that is connected to the frame unit 10 and accommodates the motion rotation unit. The seating unit 20 may include a weight transmission unit 50 that mediates between the moving and rotating unit 30 and the weight unit 40 and raises and lowers the weight of the weight unit 40 in conjunction with the rotation of the moving and rotating unit 30. The seating unit 20 may include a buttocks seating unit 21 that supports the buttocks of a seated user, a back seating unit 23 that supports the back of a seated user, a seating angle adjustment unit 25 that is connected to the frame unit 10 and the back seating unit 23 and adjusts the angle of the back seating unit, and a plurality of grip units 27 that are connected to both sides of the buttocks seating unit 21 and are provided parallel to the buttocks seating unit 21 so that the user can grip it.

[0012] In addition, the frame unit 10 according to one embodiment of the present invention includes a lower support unit 11 supported on a floor surface, a weight receiving unit 13 disposed behind the mounting unit 20 but erected from the lower support unit 11 to form an accommodating space therein for receiving the weight unit 40, a mounting support unit 15 erected from the lower support unit 11 to support the mounting unit 20, a transmission support unit 17 erected from the lower support unit 11 but disposed adjacent to the weight receiving unit 13 to support the weight transmission unit 50, and a motion support unit 19 intervening between the transmission support unit 17 and the mounting support unit 15 and supporting the motion rotation unit 30. The seating support part 15 may include a pair of seating support pieces 151 supporting the buttocks seating part 21, a pair of bent support pieces 153 extending from first points of the pair of seating support pieces 151, a rotating support piece 155 which mediates the pair of seating support pieces 151 and the back seating part 23 and has a plurality of rotating links 1551 in a space between the pair of seating support pieces 151 so that the back seating part 23 can rotate, and a seating height adjustment part 157 having one end linked to a point on the lower support part 11 and the other end linked to the pair of bent support pieces 153 and configured to adjust the height of the pair of bent support pieces 153.

[0013] In addition, the seating angle adjuster 25 according to an embodiment of the present invention may include a fan-shaped angle adjuster plate 251 fixed to the pivot link 1551 and operating in conjunction with the back seat 23, a plurality of angle adjuster holes 253 penetrating the angle adjuster plate 251 but spaced apart along an arc, a fixing lever module 255 connected to a second point of the seating support piece 151 and inserted into at least one of the angle adjuster holes 253 to fix the angle of the back seat 23, and a damper 257 mediating a third point of the seating support piece 151 and a point of the angle adjuster plate 251, and pulling the angle adjuster plate 251 toward the third point of the seating support piece 151 when the fixing lever module 255 is released.

[0014] In addition, the weight unit 40 according to one embodiment of the present invention includes a weight stack 41 formed by stacking a plurality of weights that can be separated from one another while being accommodated in the weight accommodation unit 13, a wire 43 connected to the weight transmission unit 50 on one side and the weight stack 41 on the other side, which raises and lowers the weight stack 41 by moving the weight transmission unit 50, and a wire 43 that mediates between the wire 43 and the weight stack 41, but the weights attached to the wire 43 vary depending on the connection state with the weight stack 41. a weight transfer unit 45 for transferring the weight 43 to the weight transfer unit 41; a transfer pin 47 for determining a connection state between the weight transfer unit 45 and the weight stack unit 41; and a guide roller unit 49 for providing a movement path for the wire 43 while being housed in the weight housing unit 13. The guide roller unit 49 includes a first upper roller piece 491 disposed at an upper side of the weight housing unit 13 but on the same line as the weight transfer unit 45; a second upper roller piece 492 housed in the weight housing unit 13 and disposed adjacent to the first upper roller piece 491 and biased toward the weight transfer unit 50; and a lower roller piece 495 housed in the weight housing unit 13 and disposed below the second upper roller piece 492 but adjacent to the weight transfer unit 50. The weight transfer unit 50 includes a transmission rotation shaft 51 rotatably connected to the transmission support unit 17 and a transmission adjustment plate 53 connected to the transmission rotation shaft 51 and rotated by the wire 43. The transmission adjusting plate 53 may include a first sector-shaped portion 531 formed in a sector shape, a plurality of first through holes 533 that penetrate the first sector-shaped portion 531 but are spaced apart according to an arc shape, a wire fixing portion 535 that is formed on one side of the first sector-shaped portion and to which the wire 43 is fixed, and a wire guide portion 537 that guides the wire 43 fixed to the wire fixing portion 535 so that the wire 43 is arranged along an outer circumferential surface of the first sector-shaped portion 531.

[0015] In addition, the motion rotation unit 30 according to one embodiment of the present invention includes a connecting rotation shaft 31 formed in multiple concentric stages so as to surround the outer periphery of the transmission rotation shaft 51 and rotatably connected to the transmission rotation shaft 51, a linking bar 33 connected perpendicularly to the connecting rotation shaft 31, an adjusting rotation shaft 35 rotatably connected to an end of the linking bar 33, a motion adjusting plate 37 formed at an end of the linking bar 33, and a hook 38 connected to the adjusting rotation shaft 35 and on which a user's feet are placed. a movement connecting portion 39 detachably connected to the movement adjusting plate 37, the connection rotation shaft 31 being arranged parallel to the first sector-shaped portion 531, a bending selection portion 311 having an end portion arranged at an upper portion of the plurality of first through-holes 533, and an interlocking button formed at an end of the bending selection portion 311, which is inserted into one of the plurality of first through-holes 533 and is released from the through-hole by an applied external force, and is returned to be inserted into the opposing through-hole when the applied external force is released; The interlocking button portion 313 changes the angle formed with the floor surface of the interlocking bar 33 according to the connection position with the first sector-shaped portion 531, and the height of the hanging portion 38 from the floor surface changes accordingly. The movement adjusting plate 37 includes a second sector-shaped portion 371 formed in a sector shape and a plurality of second through-holes 373 that penetrate the second sector-shaped portion 371 but are spaced apart along an arc. The movement connecting portion is disposed parallel to the second sector-shaped portion 371, and an end portion of the movement connecting portion is The movement selection unit 391 is disposed on the upper portion of the plurality of second through-holes 373, and the movement button unit 393 is formed at the end of the movement selection unit 391 and is inserted into one of the plurality of second through-holes 373, and is released from the hole by an applied external force, and is returned to be inserted into the opposing through-hole when the applied external force is released. The movement button unit 393 has a distance between the hanging portion 38 and the seating portion 20 that changes depending on the connection position with the second sector-shaped portion 371. [Effects of the Invention]

[0016] The leg extension machine according to one embodiment of the present invention allows a user to lift a weight by lifting a lever connected to the weight while sitting, and has the effect of being usable for users of all leg lengths and thicknesses.

[0017] Furthermore, the leg extension machine according to one embodiment of the present invention has a compact overall structure, which not only reduces manufacturing costs but also makes it easier to maintain and manage exercise facilities. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a diagram illustrating a leg extension machine according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating a frame part according to an embodiment of the present invention. [Figure 3] 1 is a view showing a seating support part according to an embodiment of the present invention; [Figure 4] 1 is a view showing a seating unit according to an embodiment of the present invention; [Figure 5] 1 is a view showing a seating angle adjuster according to an embodiment of the present invention; [Figure 6] 1 is a diagram illustrating a moving rotating unit according to an embodiment of the present invention; [Figure 7] FIG. 2 is a diagram showing weight parts according to an embodiment of the present invention. [Figure 8] 1 is a diagram showing a weight transmission unit according to an embodiment of the present invention; [Figure 9] 10A and 10B are comparative diagrams showing angle and height adjustments of a leg extension machine according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the concept of the present invention is not limited to the examples shown, and a person skilled in the art who understands the concept of the present invention may easily propose other degenerate inventions or other embodiments within the scope of the concept of the present invention by adding, changing, or deleting other components within the scope of the same concept, which would also be considered to be within the scope of the concept of the present invention.

[0020] The leg extension machine 1 of the present invention will be described in detail below with reference to the accompanying Figures 1 to 8.

[0021] FIG. 1 is a diagram showing a leg extension machine according to one embodiment of the present invention.

[0022] Referring to FIG. 1, a leg extension machine 1 according to an embodiment of the present invention may include a frame unit 10, a mounting unit 20, a motion rotating unit 30, a weight unit 40, and a weight transmitting unit 50.

[0023] The frame portion 10 can stand upright while being supported on the floor. The frame portion 10 will be described in more detail with reference to FIG.

[0024] FIG. 2 is a diagram showing a frame portion according to an embodiment of the present invention.

[0025] Referring to FIG. 2, the frame 10 according to an embodiment of the present invention may include a lower support 11, a weight receiving portion 13, a seating support 15, and a transmission support 17.

[0026] The lower support portion 11 can be supported on the floor surface.

[0027] The weight receiving part 13 is disposed behind the mounting part 20 and stands upright from the lower support part 11 to form a receiving space therein for receiving the weight part 40. The weight receiving part 13 may have an adjustment opening 131 that opens from the front side facing the mounting part 20 and exposes at least a portion of the weight part 40 to the outside.

[0028] The seating support part 15 stands up from the lower support part 11 and can support the seating part 20. The seating support part 15 will be described in more detail with reference to FIG.

[0029] FIG. 3 is a view showing a seating support part according to an embodiment of the present invention.

[0030] Referring to FIG. 3, the seating support part 15 according to an embodiment of the present invention may include a pair of seating support pieces 151 , a pair of bent support pieces 153 , a pivoting support piece 155 and a seating height adjusting part 157 .

[0031] The pair of seating support pieces 151 can support the buttocks seating portion 21 .

[0032] A pair of bent support pieces 153 may be extended from the first points of the pair of seating support pieces 151 .

[0033] The rotation support piece 155 mediates between the pair of seat support pieces 151 and the back seat 23, and a plurality of rotation links 1551 are provided in the space between the pair of seat support pieces 151 so that the back seat 23 can rotate.

[0034] The seating height adjusting part 157 has one end linked to a point on the lower support part 11 and the other end linked to the pair of bent support pieces 153 to adjust the height of the pair of bent support pieces 153. The seating height adjusting part 157 may be composed of two types of bars and a height adjusting button. A height adjusting grip part 159 may be provided at a point on the bent support pieces 153 to facilitate height adjustment by the seating height adjusting part 157. The seating height adjusting part 157 has the effect of adjusting the angle of the buttocks seating part 21 by adjusting the height of one side of the buttocks seating part 21.

[0035] Referring again to FIG. 2, the transmission support part 17 stands upright from the lower support part 11 and is disposed adjacent to the weight receiving part 13 to support the weight transmission part 50 .

[0036] 1, the seating unit 20 is connected to the frame unit 10 to provide a seating space for the user and may be provided to allow adjustment of the standing angle and height. The seating unit 20 will be described in more detail with reference to FIG. 4.

[0037] FIG. 4 is a view showing a seating unit according to an embodiment of the present invention.

[0038] Referring to FIG. 4, the seating portion 20 according to an embodiment of the present invention may include a buttocks seating portion 21, a back seating portion 23, a seating angle adjusting portion 25, and a pair of grip portions 27.

[0039] The buttocks support portion 21 supports the buttocks of a seated user.

[0040] The back support portion 23 supports the back of a seated user.

[0041] The seating angle adjuster 25 is connected to the frame 10 and the back seat 23 to adjust the angle of the back seat 23. The seating angle adjuster 25 will be described in more detail with reference to FIG. 5.

[0042] FIG. 5 is a view showing a seating angle adjuster according to an embodiment of the present invention.

[0043] Referring to FIG. 5, the seating angle adjuster 25 according to an embodiment of the present invention may include an angle adjustment plate 251, a plurality of angle adjustment holes 253, a fixing lever module 255, and a damper 257.

[0044] The angle adjusting plate 251 may be fixed to the rotary link 1551, move in conjunction with the back rest 23, and be formed in a fan shape.

[0045] The angle adjustment holes 253 may penetrate through the angle adjustment plate 251 and be spaced apart along an arc.

[0046] A fixing lever module 255 is coupled to a second point of the seat support piece 151 and inserted into at least one of the angle adjusting holes 253 to fix the angle of the back seat 23 .

[0047] The damper 257 mediates between the third point of the mounting support piece 151 and one point of the angle adjustment plate 251, and can pull the angle adjustment plate 251 toward the third point of the mounting support piece 151 when the fixing lever module 255 is released.

[0048] Referring again to FIG. 4, a pair of grip portions 27 may be connected to both sides of the seating portion 21 and provided parallel to the seating portion 21 so that the user can grip it.

[0049] 1, the motion rotating unit 30 is connected to the frame unit 10 but is disposed adjacent to the seating unit 20 to provide a space for a seated user to place their feet and to rotate with an external force applied by the user. The motion rotating unit 30 will be described in more detail with reference to FIG. 6.

[0050] FIG. 6 is a diagram showing a moving rotating unit according to an embodiment of the present invention.

[0051] Referring to FIG. 6, the motion rotating part 30 according to an embodiment of the present invention may include a connecting rotation shaft 31, a linking bar 33, an adjusting rotation shaft 35, a motion adjusting plate 37, and a motion connecting part 39.

[0052] The connecting rotation shaft 31 is formed in multiple concentric stages so as to surround the outer circumferential surface of the transmission rotation shaft 51 and can be rotatably connected to the transmission rotation shaft 51. The connecting rotation shaft 31 may include a folding selection portion and an interlocking button portion.

[0053] The bent selection portion 311 may be disposed in parallel with the first sector-shaped portion 531 , and an end portion thereof may be disposed above the plurality of first through-holes 533 .

[0054] The interlocking button portion 313 is formed at an end of the bending selection portion 311, and is inserted into one of the plurality of first through-holes 533 and is released from the through-hole by an applied external force, and is returned to be inserted into the opposite through-hole when the applied external force is released. The interlocking button portion 313 may be configured such that an angle formed with the floor of the interlocking bar 33 changes depending on a connection position with the first sector-shaped portion 531, thereby changing a height of the hook portion 38 from the floor.

[0055] Specifically, the link button 313 allows the knee height to be adjusted according to the user's body type and physical condition. In general, users who are unable to extend their knees well may find it difficult to place their feet on the hook 38 while lying face down. In this case, the user can exercise by raising the height of the hook 38.

[0056] The interlocking bar 33 can be connected to the connecting pivot shaft 31 perpendicularly.

[0057] The adjustment pivot shaft 35 may be pivotally connected to the end of the link bar 33 .

[0058] The movement adjusting plate 37 may be formed at an end of the interlocking bar 33. The movement adjusting plate 37 may include a second sector-shaped portion 371 formed in a sector shape and a plurality of second through-holes 373 passing through the second sector-shaped portion 371 but spaced apart along an arc.

[0059] The motion connector 39 is connected to the adjustment pivot shaft 35, provides a space for mounting a hook 38 on which a user's feet can be placed, and may be detachably connected to the motion adjustment plate 37. The motion connector may include a motion selection unit 391 arranged parallel to the second sector-shaped portion 371 and having an end located above the plurality of second through-holes 373, and a motion button 393 formed at an end of the motion selection unit 391, inserted into one of the plurality of second through-holes 373, disengaged from the through-hole by an applied external force, and returned to being inserted into the opposing through-hole when the applied external force is released. The motion button 393 may be configured such that a distance between the hook 38 and the seat 20 changes depending on a connection position with the second sector-shaped portion 371.

[0060] 1, the weight unit 40 is supported by the frame unit 10 and can accommodate a plurality of weights. The weight unit 40 will be described in more detail with reference to FIG.

[0061] FIG. 7 is a diagram showing weight parts according to one embodiment of the present invention.

[0062] Referring to FIG. 7, the weight unit 40 according to an embodiment of the present invention may include a weight stack 41, a wire 43, a weight transfer unit 45, a transfer pin 47, and a guide roller unit 49.

[0063] The weight stack portion 41 is formed by stacking a plurality of weights that can be separated from one another while being housed in the weight housing portion 13 .

[0064] One side of the wire 43 is connected to the weight transmission unit 50 and the other side is connected to the weight stack unit 41, so that the weight stack unit 41 can be raised and lowered by moving the weight transmission unit 50.

[0065] The weight mediating part 45 mediates between the wire 43 and the weight stack part 41, and the weight that is transferred to the weight mediating part 45 can be varied depending on the connection state with the weight stack part 41.

[0066] The intermediate pin 47 can determine the connection state between the weight intermediate portion 45 and the weight stack portion 41.

[0067] The guide roller portion 49 can provide a movement path for the wire 43 while being housed in the weight housing portion 13 .

[0068] The guide roller unit 49 may include a first upper roller piece 491 , a second upper roller piece 492 and a lower roller piece 495 .

[0069] The first upper roller piece 491 is disposed on the upper side of the weight receiving portion 13, but may be disposed on the same line as the weight medium portion 45.

[0070] The second upper roller piece 492 may be accommodated in the weight accommodating portion 13 and disposed adjacent to the first upper roller piece 491, and may be disposed biased toward the weight transmitting portion 50.

[0071] The lower roller piece 495 is accommodated in the weight accommodating portion 13 and is disposed below the second upper roller piece 492, but may be disposed adjacent to the weight transmitting portion .

[0072] The guide roller portion 49 allows tension to be maintained without twisting the wire 43 from the weight stack portion 41 to the weight transmission portion 50, thereby increasing the efficiency of transmission of external force.

[0073] 1 again, the weight transmission unit 50 is connected to the frame unit 10 and mediates between the motion rotation unit 30 and the weight unit 40, and can raise and lower the weight of the weight unit 40 in conjunction with the rotation of the motion rotation unit 30. The weight transmission unit 50 will be described in more detail with reference to FIG. 8.

[0074] FIG. 8 is a diagram showing a weight transmission unit according to an embodiment of the present invention.

[0075] Referring to FIG. 8, a weight transmission unit 50 according to an embodiment of the present invention may include a transmission rotation shaft 51 and a transmission adjustment plate 53.

[0076] The transmission rotation shaft 51 can be rotatably connected to the transmission support part 17 .

[0077] The transmission adjustment plate 53 is connected to the transmission rotation shaft 51 and can be rotated by the wire 43 in conjunction with the transmission rotation shaft 51 .

[0078] The transmission adjusting plate 53 may include a first sector-shaped portion 531 , a plurality of first through holes 533 , a wire fixing portion 535 and a wire guide portion 537 .

[0079] The first sector-shaped portion 531 may be formed in a sector shape.

[0080] The first through holes penetrate the first sector-shaped portion 531, but are spaced apart along an arc.

[0081] The wire fixing portion 535 is formed on one side of the first sector-shaped portion 531, and the wire 43 can be fixed thereto.

[0082] The wire guide portion 537 may guide the wire 43 fixed to the wire fixing portion 535 so that the wire 43 is disposed along the outer circumferential surface of the first sector-shaped portion 531 .

[0083] When the wire 43 is wound or unwound along the outer circumferential surface of the first sector-shaped portion 531 , the wire guide portion 537 can prevent the wire 43 from coming off the first sector-shaped portion 531 .

[0084] In addition, an example of angle adjustment of the leg extension machine will be described below with reference to FIG.

[0085] FIG. 9 is a comparative diagram of the leg extension machine according to an embodiment of the present invention with different angle and height settings.

[0086] 9, the seat height adjuster 157, seat angle adjuster 25, exercise adjuster plate 37, intermediate pin 47, and transmission adjuster plate 53 can be adjusted to suit the body of each user, allowing for effective exercise. The leg extension machine 1 of the present invention can be used in various embodiments other than the examples (a) and (b).

[0087] As described above, according to one embodiment of the present invention, a user can lift a weight and exercise by lifting a lever connected to the weight while remaining seated, and it has the effect of being usable for users of all leg lengths and thicknesses.

[0088] Furthermore, the leg extension machine according to an embodiment of the present invention has a compact overall structure, which not only reduces manufacturing costs but also makes it easier to maintain and manage exercise facilities.

[0089] Although one embodiment of the present invention has been described above based on limited examples and drawings, the embodiment of the present invention is not limited to the above example, and various modifications and variations can be made by those skilled in the art based on such description. Therefore, one embodiment of the present invention should be understood only by the scope of the following claims, and all equivalent or similar modifications are considered to fall within the scope of the present invention. [Explanation of symbols]

[0090] 1: Leg extension machine 10: Frame section 20: Landing section 30: Rotating part 40: Part by weight 50: Weight transmission section

Claims

1. A frame part (10) that stands up while being supported on the floor; a seating section (20) connected to the frame section (10) to provide a space for a user to sit and whose standing angle and height are adjustable; a rotating part (30) connected to the frame part (10) but arranged adjacent to the seating part (20) to provide a space for a seated user to place their feet, and which is rotated by an external force applied by the user; a weight section (40) supported by the frame section (10) and containing a plurality of weights; and a weight transmission unit (50) connected to the frame unit (10), acting as an intermediary between the moving rotation unit (30) and the weight unit (40), and lifting and lowering the weight of the weight unit (40) in conjunction with the rotation of the moving rotation unit (30); Including, The seating portion (20) is a buttocks support portion (21) for supporting the buttocks of a seated user; a back support portion (23) for supporting the back of a seated user; a seating angle adjusting unit (25) connected to the frame unit (10) and the back seating unit (23) for adjusting the angle of the back seating unit (23); and a plurality of grip portions (27) connected to both sides of the seating portion (21) and provided parallel to the seating portion (21) so that the user can grip the gripping portion; Leg extension machine including.

2. The frame portion (10) is A lower support part (11) supported on the floor surface; a weight receiving part (13) that is arranged behind the seating part (20) but stands upright from the lower support part (11) and forms a receiving space therein to provide a space for receiving the weight part (40); a seating support part (15) standing upright from the lower support part (11) and supporting the seating part (20); a transmission support part (17) that stands up from the lower support part (11) and is disposed adjacent to the weight storage part (13) to support the weight transmission part (50); and a motion support part (19) that mediates between the transmission support part (17) and the seating support part (15) and supports the motion rotation part (30); Including, The seating support portion (15) is A pair of seating support pieces (151) supporting the buttock seating portion (21); a pair of bent support pieces (153) extending from the first points of the pair of seating support pieces (151); a rotation support piece (155) that mediates the pair of seating support pieces (151) and the back seating part (23) and has a plurality of rotation links (1551) provided in the space between the pair of seating support pieces (151) so that the back seating part (23) can rotate; and a seating height adjusting part (157) whose one end is linked to a point of the lower support part (11) and whose other end is linked to the pair of bent support pieces (153) and which is provided to adjust the height of the pair of bent support pieces (153); 10. The leg extension machine of claim 1, comprising:

3. The seating angle adjustment unit (25) is An angle adjustment plate (251) fixed to the rotating link (1551) and moving in conjunction with the back rest (23) and formed in a fan shape; A plurality of angle adjustment holes (253) are formed through the angle adjustment plate (251) and spaced apart along an arc; a fixing lever module (255) coupled to a second point of the seating support piece (151) and inserted into at least one of the angle adjusting holes (253) to fix the angle of the back seating part (23); and a damper (257) that mediates between the third point of the seating support piece (151) and one point of the angle adjusting plate (251) and pulls the angle adjusting plate (251) toward the third point of the seating support piece (151) when the fixing lever module (255) is released; 3. The leg extension machine of claim 2, comprising:

4. The weight part (40) is a weight stack (41) formed by stacking a plurality of weights that can be separated from one another while being accommodated in the weight accommodating section (13); a wire (43) connected at one end to the weight transmission unit (50) and at the other end to the weight stack unit (41), for raising and lowering the weight stack unit (41) by moving the weight transmission unit (50); a weight mediating portion (45) that mediates between the wire (43) and the weight stack portion (41) and allows the weights attached thereto to vary depending on the state of connection with the weight stack portion (41); A mediating pin (47) that determines the connection state between the weight mediating portion (45) and the weight stack portion (41); and a guide roller portion (49) that provides a path for the wire (43) while being housed in the weight housing portion (13); Including, The guide roller portion (49) a first upper roller piece (491) disposed at the upper side of the weight receiving portion (13) but aligned with the weight transfer portion (45); A second upper roller piece (492) accommodated in the weight accommodation section (13), arranged adjacent to the first upper roller piece (491), and biased toward the weight transmission section (50); and a lower roller piece (495) accommodated in the weight accommodation portion (13) and disposed below the second upper roller piece (492) but adjacent to the weight transmission portion (50); Including, The weight transmission unit (50) a transmission pivot shaft (51) rotatably connected to the transmission support part (17); and a transmission adjusting plate (53) that is connected to the transmission rotating shaft (51) and rotated by the wire (43); Including, The transmission adjustment plate (53) is a first sector-shaped portion (531) formed in a sector shape; a plurality of first through holes (533) that penetrate the first sector-shaped portion (531) but are spaced apart along an arc; a wire fixing portion (535) formed on one side of the first sector-shaped portion and to which the wire (43) is fixed; and a wire guide portion (537) for guiding the wire (43) fixed to the wire fixing portion (535) so that the wire (43) is arranged along the outer circumferential surface of the first sector-shaped portion (531); 4. The leg extension machine of claim 3, comprising:

5. The moving rotation part (30) is a connecting pivot shaft (31) formed in multiple concentric stages so as to surround the outer circumferential surface of the transmission pivot shaft (51) and rotatably connected to the transmission pivot shaft (51); a link bar (33) connected perpendicularly to the link pivot shaft (31); an adjustment pivot shaft (35) pivotably connected to the end of the interlocking bar (33); A movement adjustment plate (37) formed at the end of the interlocking bar (33); and a movement connecting part (39) connected to the adjustment pivot (35), providing a space for mounting a hanger (38) on which the user's feet are placed, and detachably connected to the movement adjustment plate (37); Including, The connecting pivot shaft (31) is a bending selection portion (311) arranged parallel to the first sector-shaped portion (531) and having an end portion arranged above the plurality of first through holes (533); and a linking button portion (313) formed at an end of the bending selection portion (311), which is inserted into one of the plurality of first through holes (533) and is released from the through hole by an applied external force, and is returned to be inserted into the opposing through hole when the applied external force is released; Including, The interlocking button part (313) is The angle formed with the bottom surface of the interlocking bar (33) is changed depending on the connection position with the first sector-shaped portion (531), and the height of the hanging portion (38) from the bottom surface is changed; The movement adjustment plate (37) is A second sector-shaped portion (371) formed in a sector shape; and a plurality of second through holes (373) that penetrate the second sector-shaped portion (371) but are spaced apart along an arc; Including, The motion linkage is a movement selection portion (391) arranged parallel to the second sector-shaped portion (371) and having an end portion arranged above the plurality of second through-holes (373); and a movement button unit (393) formed at an end of the movement selection unit (391), which is inserted into one of the plurality of second through-holes (373) and is released from the through-hole by an applied external force, and is returned to be inserted into the opposing through-hole when the applied external force is released; Including, The exercise button part (393) 5. The leg extension machine according to claim 4, wherein the distance between the hanging portion (38) and the seating portion (20) varies depending on the connection position of the second sector-shaped portion (371).

Images