Weight training equipment with adjustable exercise angle

Abstract

The present invention relates to a weight training device with adjustable exercise bar angles. The weight training device of the present invention includes a main frame, first and second exercise bars hinged to one side of the main frame so that a user can push or pull them with a grip, and an exercise bar rotation unit that rotates the first and second exercise bars in opposite directions based on the longitudinal central axes of the first and second exercise bars. The exercise bar rotation unit includes a connecting plate that includes a fixing pin and is rotatably connected to the main frame between the first and second exercise bars, a holder that includes a plurality of angle adjustment holes and is configured to fix the fixing pin inserted into one of the angle adjustment holes, and first and second connecting bars that connect the first and second exercise bars to the connecting plate and rotate the first and second exercise bars respectively based on the central axes by rotating the connecting plate.

Description

[Technical Field]

[0001] The present invention relates to a weight training apparatus, and more particularly to a weight training apparatus in which the movement angle of an exercise bar can be variably adjusted. [Background technology]

[0002] The mechanical upper and lower body weight equipment used in conventional fitness centers has the disadvantage that the angle at which the exercise bar is pushed or pulled is specified to be a single angle, making it difficult to provide diverse stimulation to the muscles in the relevant area. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention has been made in view of the above points, and its object is to provide a weight training device that allows a user to adjust the angle of an exercise bar that is pushed or pulled during weight training. [Means for solving the problem]

[0004] To achieve the above object, the weight training apparatus according to the present invention includes a main frame, first and second exercise bars hingedly connected to one side of the main frame so that a user can push or pull them with a grip, and an exercise bar rotation unit that rotates the first and second exercise bars in opposite directions based on the longitudinal central axes of the first and second exercise bars. The exercise bar rotation unit includes a connecting plate that includes a fixing pin and is rotatably connected to the main frame between the first and second exercise bars, a holder that includes a plurality of angle adjustment holes and is configured to fix the fixing pin inserted into any of the angle adjustment holes, and first and second connecting bars that connect the first and second exercise bars to the connecting plate and rotate the first and second exercise bars respectively based on the central axes by rotating the connecting plate. [Effects of the Invention]

[0005] The weight training apparatus according to the present invention allows the user to stimulate muscles in various parts by adjusting the angle of the exercise bar.

[0006] The effects of the present invention are not limited to the effects described above, but should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the present invention or the claims. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of a weight training device according to a first embodiment of the present invention, viewed from the rear left side. [Figure 2] 1 is a perspective view of a weight training apparatus according to a first embodiment of the present invention, viewed from the rear right side. [Figure 3] 1 is an enlarged view of an exercise bar rotating portion 40 of a weight training device according to a first embodiment of the present invention. [Figure 4] 1 is a side view showing a weight training device according to a first embodiment of the present invention. [Figure 5] 1 is a detailed view of the first and second connecting brackets 50, 60 of the weight training device according to the first embodiment of the present invention. [Figure 6] FIG. 10 is a perspective view showing a portion of a weight training device according to a second embodiment of the present invention. [Figure 7] FIG. 7 is a front view of FIG. 6. [Figure 8] FIG. 10 is a perspective view showing a portion of a weight training device according to a third embodiment of the present invention. [Figure 9] FIG. 9 is a front view of FIG. 8. [Figure 10] FIG. 10 is a perspective view showing a portion of a weight training apparatus according to a fourth embodiment of the present invention. [Figure 11] FIG. 11 is a plan view of FIG. [Figure 12] FIG. 10 is a perspective view of a weight training apparatus according to a fifth embodiment of the present invention, seen from the right side. [Figure 13] FIG. 10 is a perspective view of a weight training apparatus according to a fifth embodiment of the present invention, seen from the left side. [Figure 14] 10 is a view showing first and second exercise bars 520, 530, an exercise bar rotation unit 540, and an exercise bar angle adjustment unit 550 according to a fifth embodiment of the present invention. [Figure 15] 10 is a view showing a case where the left and right angles of the first and second exercise bars 520 and 530 are set to 0 degrees by the exercise bar angle adjuster 550 according to the fifth embodiment of the present invention. [Figure 16] 10 is a view showing a case where the left and right angles of the first and second exercise bars 520 and 530 are set to 10 degrees by the exercise bar angle adjuster 550 according to the fifth embodiment of the present invention. [Figure 17] 10 is a view showing a case where the left and right angles of the first and second exercise bars 520 and 530 are set to −10 degrees by the exercise bar angle adjuster 550 according to the fifth embodiment of the present invention. [Figure 18] 10 is a diagram showing a bench 511 and a swing shaft support part 515 in the case where a swing shaft 514 and third and fourth rotation shafts 524, 534 share a rotation shaft according to a fifth embodiment of the present invention. FIG. [Figure 19] FIG. 10 is a view showing a bench 511 and a swing shaft support part 515 in a state where the position of the swing shaft 514 is adjusted so that the distance between the swing shaft 514 and the third and fourth rotation shafts 524 and 534 is increased according to a fifth embodiment of the present invention. [Figure 20] FIG. 10 is a view showing the bench 511 and the swing shaft support part 515 in a state where the position of the swing shaft 514 is adjusted so that the distance between the swing shaft 514 and the third and fourth rotation shafts 524, 534 is maximized according to the fifth embodiment of the present invention. [Figure 21] 10 is a view showing a swing angle adjuster 560 according to a fifth embodiment of the present invention. FIG. [Figure 22] 13A and 13B are diagrams illustrating a free swing in a forward mode according to a fifth embodiment of the present invention. [Figure 23] FIG. 10 is a diagram illustrating a free swing in a forward mode according to a fifth embodiment of the present invention. [Figure 24]13A and 13B are diagrams illustrating a free swing in a reverse direction mode according to a fifth embodiment of the present invention. [Figure 25] 13A and 13B are diagrams illustrating a free swing in a reverse direction mode according to a fifth embodiment of the present invention. [Figure 26] 10A and 10B are diagrams showing examples of first and second swing brackets 585 and 586 according to a fifth embodiment of the present invention. [Figure 27] 10A and 10B are views showing other examples of the first and second swing brackets 585 and 586 according to the fifth embodiment of the present invention. [Figure 28] 10A and 10B are diagrams showing an example of first and second swing connectors 581 and 582 according to a fifth embodiment of the present invention. [Figure 29] 10A and 10B are diagrams showing other examples of first and second swing connectors 581 and 582 according to the fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] The disclosed embodiments will be described in detail below with reference to the accompanying drawings.

[0009] First, it is made clear that the terms used below are defined taking into consideration their functions in the present invention and should be interpreted as concepts that conform to the technical ideas of the present invention and as meanings that are commonly or commonly recognized in the art. Furthermore, if a detailed description of a well-known function or configuration related to the present invention is deemed to obscure the gist of the present invention, the detailed description thereof will be omitted.

[0010] Although the upper body weight training device according to the present invention is described as a shoulder press and the lower body weight training device is described as a leg extension, the present invention is not limited to these and may be applied to various weight training devices using exercise bars or grips.

[0011] First Example FIG. 1 is a perspective view of a weight training apparatus according to a first embodiment of the present invention, viewed from the rear left side; FIG. 2 is a perspective view of a weight training apparatus according to a first embodiment of the present invention, viewed from the rear right side; FIG. 3 is an enlarged view of an exercise bar rotating portion 40 of the weight training apparatus according to the first embodiment of the present invention; FIG. 4 is a side view of the weight training apparatus according to the first embodiment of the present invention; and FIG. 5 is a detailed view of the first and second connecting brackets 50, 60 of the weight training apparatus according to the first embodiment of the present invention.

[0012] 1 and 2, the weight training device according to the first embodiment of the present invention includes, as main components, a main frame 10, first and second exercise bars 20 and 30, an exercise bar rotation unit 40, first and second connecting brackets 50 and 60, a weight unit 70, third and fourth connecting bars 80 and 90, and first and second stoppers 81 and 91. Although other components constituting the weight training device may be included, the following description will focus on the main components of the present invention.

[0013] The main frame 10 is installed to be able to rest on the ground and support and connect other components. The main frame 10 may be equipped with a bench 11 on which an exerciser can sit, a foot plate, and the like.

[0014] One end of the first and second movement bars 20, 30 is hinged to one side of the upper front part of the main frame 10 at a fixed interval, and the other end of the first and second movement bars 20, 30 is provided with grips 21, 31, respectively, so that the user can push or pull the first and second movement bars 20, 30.

[0015] The exercise bar rotation unit 40 is configured to rotate the first and second exercise bars 20, 30 in opposite directions based on the longitudinal central axes of the first and second exercise bars 20, 30. By changing the angle of the first and second exercise bars 20, 30, the muscle areas to be stimulated change.

[0016] The motion bar rotation unit 40 includes a connection plate 41 having a fixing pin 42 and rotatably connected to the upper part of the front part of the main frame 10 between the first and second motion bars 20 and 30, a holder 43 having a plurality of angle adjustment holes 43a and provided on the front part of the main frame 10 so that the fixing pin 42 inserted into one of the angle adjustment holes 43a is fixed, and first and second connection bars 44 and 45 connecting the first and second motion bars 20 and 30 to the connection plate 41 and rotating the first and second motion bars 20 and 30 about their central axes as the connection plate 41 rotates.

[0017] The connecting plate 41 includes an angle adjustment knob 42a coupled to the fixing pin 42. The angle adjustment knob 42a can be used to move the fixing pin 42 up and down to attach and detach it from the angle adjustment hole 43a. The connecting plate 41 is configured to rotate around its central rotation axis 41a. After the fixing pin 42 is pulled up and separated from the existing angle adjustment hole 43a, the connecting plate 41 is rotated by moving the angle adjustment knob 42a up or down. Once the connecting plate 41 has rotated to an appropriate angle, the pulled-up fixing pin 42 is released, and the fixing pin 42 is retracted into the angle adjustment hole 43a, fixing the angle. The angle adjustment holes 43a are provided in the holder 43 at regular intervals along the movement path of the fixing pin 42 as the connecting plate 41 rotates.

[0018] In this way, the angles of the grips 21 and 31 can be adjusted by rotating the first and second movement bars 20 and 30. The connecting plate 41 shown in the figure is configured as a flat plate, but its shape and size can be changed in various ways.

[0019] Furthermore, by aligning the centers of the grips 21, 31 with the central axes of the first and second exercise bars 20, 30, the position of the parts gripped by the hands does not change even when the first and second exercise bars 20, 30 are rotated. Therefore, by rotating the first and second exercise bars 20, 30 and changing the angle, the outer, central, and inner parts of the muscles can be stimulated as intended.

[0020] One end of the first connecting bar 44 is hinged to the upper part of the left end of the connecting plate 41, and the other end of the first connecting bar 44 is hinged to the first bracket 22 fixed to the lower end of the first motion bar 20. The first connecting bar 44 moves upward or downward as the connecting plate 41 rotates, and the first bracket 22 and the first motion bar 20 rotate together as the first connecting bar 44 moves.

[0021] One end of the second connecting bar 45 is hinged to the lower left end of the connecting plate 41, and the other end of the second connecting bar 45 is hinged to the second bracket 32 ​​fixed to the lower end of the second motion bar 30. The second connecting bar 45 moves left or right as the connecting plate 41 rotates, and the second bracket 32 ​​and the second motion bar 30 rotate together as the second connecting bar 45 moves.

[0022] The fixing pin 42 is coupled to the other right end of the connecting plate 41 so as to pass through the connecting plate 41 .

[0023] In this way, the first and second movement bars 20 and 30 rotate in opposite directions at the same angle depending on the connection relationship and positions of the connection plate 41 and the first and second connection bars 44 and 45.

[0024] The first and second brackets 22, 32 are configured as flat plates that are angled downward and inward, but their shapes and sizes can be configured differently depending on the connection relationship and positions of the connecting plate 41 and the first and second connecting bars 44, 45. In addition, the positions of the contact points 22a, 32a of the first and second brackets 22, 32 also vary depending on the connection relationship and positions of the connecting plate 41 and the first and second connecting bars 44, 45.

[0025] As shown in FIG. 3, angle C of first bracket 22 inclined from horizontal and angle A of second bracket 32 ​​inclined from horizontal are identical angles facing each other, and are angles that minimize deviation when adjusting the angles of grips 21 and 31. These angles can be referred to as "variable angles." Angle B of connecting plate 41 can be referred to as a fixed angle because it maintains a 90-degree angle. However, angle B is the angle between the imaginary line connecting the tangent point of rotation axis 41a of connecting plate 41 to first connecting bar 44 and the imaginary line connecting the tangent point of rotation axis 41a to second connecting bar 45. This angle minimizes deviation when adjusting the angles of grips 21 and 31. As the variable angle and fixed angle change, the magnitude of the deviation between angles A and B changes during angle adjustment. For example, if the fixed angle is 90 degrees and the variable angle is 60 degrees, adjusting the angle adjustment knob 42a from -20 degrees to +20 degrees in 5-degree increments will result in a negligible deviation between angles A and B. However, if the variable angle is changed to 65, 70, 75, or 80 degrees, the deviation between angles A and B will increase. This means that the angles of the left and right grips 21 and 31 will be different, resulting in different exercise angles.

[0026] If the fixed angle is not 90 degrees and the variable angle is not 60 degrees, for example, if the fixed angle is 120 degrees and the variable angle is 50, 55, or 65 degrees, the deviation between angles A and B will be greater than when the fixed angle is 90 degrees and the variable angle is 60 degrees, and the device will no longer function as an exercise device. Therefore, angles A and B can only function as an exercise device within a limited angle condition range. If this condition is exceeded, the deviation between the angles of the left and right grips 21 and 31 will be too great and the device will no longer function as an exercise device. Thus, it is technically very important to specify the limited angle condition range for angles A and B. When the variable angle is 60 degrees and the fixed angle is 90 degrees, the rate of change (deviation) between angles A and B in the adjustment range from -20 degrees to +20 degrees is 0.57%, making it suitable for use as an exercise device.

[0027] 4 and 5, the first and second connecting brackets 50, 60 are intended to fix the first and second movement bars 20, 30 in their original positions without interlocking with the weight unit 70 even when the first and second movement bars 20, 30 rotate, and are respectively coupled to the lower parts of the first and second movement bars 20, 30 facing the weight unit 70. The first and second connecting brackets 50, 60 are each a pair spaced a certain distance apart above and below, with first and second stoppers 81, 91 located in the center that connect the connecting bars 80, 90, and the upper and lower connecting brackets have arc-shaped elongated holes 51, 61 spaced apart so that stoppers that share the vertical central axis of the first and second movement bars 20, 30 can be fitted in.

[0028] The first and second stoppers 81 and 91 are in the form of pipes with a certain thickness so that a fixing pin can be inserted in the center, and their length is such that they can be assembled into the spaces between the upper and lower connecting brackets, and their sides are designed to be assembled to the third and fourth connecting bars 80 and 90.

[0029] The weight section 70 is for providing weight to the first and second exercise bars 20, 30, and includes left and right barbell plate shafts 71 to which multiple barbell plates can be attached.

[0030] The third and fourth connecting bars 80, 90 are respectively assembled and connected to the first and second stoppers 81, 91 which are connected to the weight section 70 and the first and second connecting brackets 50, 60. Spherical bearings that rotate back and forth and left and right are attached to the upper and lower ends of the third and fourth connecting bars 80, 90, and the upper ends are assembled to the first and second stoppers 81, 91, and the lower ends are assembled to the left and right weight sections 70, respectively.

[0031] The first stopper 81 is inserted into the elongated hole 51 of the first connecting bracket 50, which consists of upper and lower brackets, and the second stopper 91 is inserted into the elongated hole 61 of the second connecting bracket 60, which consists of upper and lower brackets.

[0032] The third stopper 25 is hingedly connected to the lower end of the first movement bar 20 and rotates together with the first movement bar 20 about the longitudinal central axis, but limits the movement of the first movement bar 20 to restrict the downward movement range of the grip 21. The fourth stopper 35 is hingedly connected to the lower end of the second movement bar 30 and rotates together with the second movement bar 30 about the longitudinal central axis, but limits the movement of the second movement bar 30 to restrict the downward movement range of the grip 31.

[0033] Second Example FIG. 6 is a perspective view showing a portion of a weight training device according to a second embodiment of the present invention, and FIG. 7 is a front view of the device shown in FIG.

[0034] The weight training device according to the second embodiment of the present invention is almost identical to the first embodiment in components such as main frame 10, first and second exercise bars 20 and 30, first and second connecting brackets 50 and 60, weight unit 70, third and fourth connecting bars 80 and 90, and first and second stoppers 81 and 91. However, the exercise bar rotation unit 240, first and second brackets 222 and 232, and holder 243 are different from those of the first embodiment. Therefore, only the components of the second embodiment that differ from the first embodiment, namely, exercise bar rotation unit 240, first and second brackets 222 and 232, and holder 243, will be described.

[0035] Similarly, the exercise bar rotation unit 240 of the second embodiment is configured to rotate the first and second exercise bars 20, 30 in opposite directions based on the longitudinal central axes of the first and second exercise bars 20, 30. By changing the angle of the first and second exercise bars 20, 30, the muscle areas to be stimulated change.

[0036] The motion bar rotation unit 240 of the second embodiment includes a first bracket 222 and a fixing pin 242 fixedly coupled to one end of the first motion bar 20 so as to rotate together with the first motion bar 20, a second bracket 232 fixedly coupled to one end of the second motion bar 30 so as to rotate together with the second motion bar 30, a holder 243 having a plurality of angle adjustment holes 243a and provided on the front part of the main frame 10 so as to fix the fixing pin 242 inserted into one of the angle adjustment holes 243a, and a connecting bar 245 connecting the first bracket 222 and the second bracket 232 and transmitting the rotational force of the second bracket 232 to the first bracket 222 so that the first and second motion bars 20, 30 rotate about their longitudinal central axes as the second bracket 232 rotates. Here, the angle adjustment holes 243a are provided in the holder 243 at regular intervals on the movement path of the fixing pin 242 as the second bracket 232 rotates. One end of the connecting bar 245 is hinged to one end of the first bracket 222 , and the other end of the connecting bar 245 is hinged to the lower part of the second bracket 232 .

[0037] The first bracket 222 is configured as a flat plate extending horizontally inward, but its shape and size can be configured differently depending on the connection relationship between the second bracket 232 and the connecting bar 245 and their positions.

[0038] In the case of the second bracket 232, it is preferable that the angle between the imaginary line connecting the central axis of the second movement bar 30 to the fixing pin 242 and the imaginary line connecting the central axis of the second movement bar 30 to the contact point 232a is set to 90 degrees. The fixing pin 242 is located to the left of the central axis of the second movement bar 30, and the contact point 232a is located below the central axis of the second movement bar 30. Furthermore, the distance (d) from the central axis of the first movement bar 20 to the contact point 222a is the same as the distance (d) from the central axis of the second movement bar 30 to the contact point 232a.

[0039] The second bracket 232 includes an angle adjustment knob 242a coupled to the fixing pin 242, and the fixing pin 242 can be moved up and down using this angle adjustment knob 242a to be attached to or detached from the angle adjustment hole 243a. After the fixing pin 242 is pulled up and separated from the existing angle adjustment hole 243a, the angle adjustment knob 242a is moved up or down to rotate the second bracket 232. Once the second bracket 232 has rotated to an appropriate angle, the pulled-up fixing pin 242 is released, and the fixing pin 242 is retracted into the angle adjustment hole 243a, fixing the angle. In this way, the rotation of the second bracket 232 rotates the first and second movement bars 20 and 30, thereby adjusting the angles of the respective grips 21 and 31.

[0040] One end of the connecting bar 245 is hinged to the contact point 222a of the first bracket 222, and the other end of the connecting bar 245 is hinged to the contact point 232a of the second bracket 232. The positions of the contact points 222a and 232a of the first and second brackets 222 and 232 vary depending on the connection relationship between the first and second brackets 222 and 232 and the connecting bar 245 and their positions.

[0041] As the second bracket 232 rotates, the second movement bar 30 rotates, and the connecting bar 245 moves upward to the left or downward to the right, rotating the first bracket 222 and the first movement bar 20. In this way, depending on the connection relationship between the first and second brackets 222, 232 and the connecting bar 245 and their positions, the first and second movement bars 20, 30 rotate at the same angle in opposite directions.

[0042] Third Example FIG. 8 is a perspective view showing a portion of a weight training device according to a third embodiment of the present invention, and FIG. 9 is a front view of the device shown in FIG.

[0043] The weight training device according to the third embodiment of the present invention is almost identical to the first embodiment in components such as main frame 10, first and second exercise bars 20 and 30, first and second connecting brackets 50 and 60, weight unit 70, third and fourth connecting bars 80 and 90, and first and second stoppers 81 and 91, but differs from the first embodiment in first and second brackets 322 and 332 and first and second holders 343 and 344. Therefore, only the first and second brackets 322 and 332 and first and second holders 343 and 344, which are components of the third embodiment that differ from the first embodiment, will be described.

[0044] In the third embodiment, the first and second brackets 322, 332 are not linked to each other but rotate independently. As shown in Figures 8 and 9, the first bracket 322 includes a first fixing pin 342a and is fixedly connected to one end of the first movement bar 20 so as to rotate together with the first movement bar 20. The second bracket 332 includes a second fixing pin 342b and is fixedly connected to one end of the second movement bar 30 so as to rotate together with the second movement bar 30.

[0045] The first holder 343 includes a number of first angle adjustment holes 343a and is provided on the front surface of the main frame 10 to fix the first fixing pin 342a inserted into one of the first angle adjustment holes 343a. The second holder 344 includes a number of second angle adjustment holes 344a and is provided on the front surface of the main frame 10 to fix the second fixing pin 342b inserted into one of the second angle adjustment holes 344a. The first holder 343 and the second holder 344 are provided parallel to the front surface of the main frame 10 with a gap between them.

[0046] The first angle adjustment holes 343a are provided in the first holder 343 at regular intervals on the movement path of the first fixed pin 342a caused by the rotation of the first bracket 322, and the second angle adjustment holes 344a are provided in the second holder 344 at regular intervals on the movement path of the second fixed pin 342b caused by the rotation of the second bracket 332.

[0047] The first movement bar 20 rotates around its longitudinal central axis by rotating the first bracket 322, and the second movement bar 30 rotates around its longitudinal central axis by rotating the second bracket 332.

[0048] The first and second brackets 322, 332 are configured as flat plates facing inward in the horizontal direction, but their shapes and sizes can be different. The first fixing pin 342a is located to the right of the center axis of the first movement bar 20, and the second fixing pin 342b is located to the left of the center axis of the second movement bar 30.

[0049] The first bracket 322 also includes a first angle adjustment knob 342c coupled to the first fixing pin 342a, and the first fixing pin 342a can be moved up and down using the first angle adjustment knob 342c to be attached to and detached from the first angle adjustment hole 343a. After the first fixing pin 342a is pulled up and separated from the existing angle adjustment hole 343a, the first bracket 322 is rotated by moving the first angle adjustment knob 342c up or down.

[0050] Once the first bracket 322 has rotated at an appropriate angle, the first fixing pin 342a that had been pulled up is released, and the first fixing pin 342a is retracted into the first angle adjusting hole 343a, thereby fixing the angle.

[0051] In this way, by rotating the first bracket 322 and individually rotating the first exercise bar 20, the angle of the left grip 21 can be adjusted individually.

[0052] Similarly, the second bracket 332 includes a second angle adjustment knob 342d coupled to a second fixing pin 342b. The second fixing pin 342b can be moved up and down using the second angle adjustment knob 342d to be attached to and detached from the second angle adjustment hole 344a. After the second fixing pin 342b is pulled up and separated from the existing angle adjustment hole 344a, the second bracket 332 is rotated by moving the second angle adjustment knob 342d up or down. Once the second bracket 332 has rotated to the appropriate angle, the pulled-up second fixing pin 342b is released, and the second fixing pin 342b is retracted into the second angle adjustment hole 344a, fixing the angle. In this way, the angle of the right grip 31 can be individually adjusted by individually rotating the second movement bar 30 through rotation of the second bracket 332.

[0053] Fourth Example FIG. 10 is a perspective view showing a portion of a weight training device according to a fourth embodiment of the present invention, and FIG. 11 is a plan view of FIG.

[0054] The weight training device according to the fourth embodiment of the present invention is almost identical to the first embodiment in components such as main frame 10, first and second exercise bars 20 and 30, first and second connecting brackets 50 and 60, weight unit 70, third and fourth connecting bars 80 and 90, and first and second stoppers 81 and 91, but differs in that it uses multiple gears 444, 445, 446, and 447 instead of exercise bar rotating unit 240 and first and second brackets 222 and 232 of the first embodiment. Therefore, only the multiple gears 444, 445, 446, and 447 and holder 443, which are components of the fourth embodiment that differ from the first embodiment, will be described.

[0055] The motion bar rotating unit 440 of the fourth embodiment includes four gears 444, 445, 446, and 447 for rotating the first and second motion bars 20 and 30 in opposite directions based on the longitudinal central axes of the first and second motion bars 20 and 30.

[0056] The first gear 444 is fixedly coupled to one end of the first motion bar 20 so as to rotate together with the first motion bar 20, and the second gear 445 is fixedly coupled to one end of the second motion bar 30 so as to rotate together with the second motion bar 30. The gear ratios or rotation ratios of at least the first and second gears 444, 445 must be identical to each other, and the gear ratios or rotation ratios of the third and fourth gears 446, 447 must be identical to each other.

[0057] The third and fourth gears 446 and 447 are rotatably coupled to the front of the main frame 10 between the first and second gears 444 and 445, and rotate around their respective central rotation axes. The first, second, third, and fourth gears 444, 445, 446, and 447 are arranged in a row and rotate in mesh with gears on their respective peripheries. When at least one of the third and fourth gears 446 and 447 rotates, the third and fourth gears 446 and 447 transmit rotational force to the first and second gears 444 and 445. In order for the first and second movement bars 20 and 30 to rotate at the same angle, it is preferable that the gear ratios or rotation ratios of the first and second gears 444 and 445 and the third and fourth gears 446 and 447 be the same.

[0058] The exercise bar rotating unit 440 of the fourth embodiment includes a holder 443, which is provided on the front surface of the main frame 10 between the main frame 10 and the fourth gear 447. The holder 443 has a number of angle adjustment holes, and a fixing pin 442 provided on at least one of the third and fourth gears 446 and 447 is inserted into one of the angle adjustment holes to fix the holder 443. The angle adjustment holes are provided on the holder 443 at regular intervals on the movement path of the fixing pin 442 caused by the rotation of either the third or fourth gear 446 or 447.

[0059] At least one of the third and fourth gears 446, 447 includes a fixing pin 442 and an angle adjustment knob 442a, and the fixing pin 442 can be moved up and down using the angle adjustment knob 442a to be attached to or detached from the angle adjustment hole.

[0060] When either the third or fourth gear 446, 447 is rotated using the angle adjustment knob 442a, this rotational force is transmitted to the first and second gears 444, 445, thereby causing the first and second movement bars 20, 30 to rotate in opposite directions at the same angle.

[0061] Fifth Example FIG. 12 is a perspective view of a weight training apparatus according to a fifth embodiment of the present invention as seen from the right side, and FIG. 13 is a perspective view of a weight training apparatus according to the fifth embodiment of the present invention as seen from the left side.

[0062] 12 and 13, the weight training apparatus according to the fifth embodiment of the present invention includes, as main components, a main frame 510, a bench 511, a backrest 512, first and second exercise bars 520 and 530, an exercise bar rotation unit 540, an exercise bar angle adjustment unit 550, a swing angle adjustment unit 560, and a weight unit 570. Although other components constituting the weight training apparatus may be included, the following description will focus on the main components of the present invention.

[0063] The first and second exercise bars 520 and 530 are configured so that a user can push or pull them with their legs while sitting on the bench 511, and are rotatable left and right based on the first and second vertical rotation axes 523 and 533, respectively, and can also be rotated up and down based on the third and fourth horizontal rotation axes 524 and 534, respectively.

[0064] The first and second exercise bars 520 and 530 are connected to the first and second exercise bar support parts 522 and 532, respectively. As shown in FIG. 14, when a user pushes or pulls the first and second exercise bars 520 and 530, the first and second exercise bars 520 and 530 and the first and second exercise bar support parts 522 and 532 rotate up and down together based on the third and fourth rotation axes 524 and 534.

[0065] FIG. 15 shows a case where the left and right angles of the first and second exercise bars 520, 530 are set to 0 degrees by the exercise bar angle adjustment unit 550, FIG. 16 shows a case where the left and right angles of the first and second exercise bars 520, 530 are set to 10 degrees by the exercise bar angle adjustment unit 550, and FIG. 17 shows a case where the left and right angles of the first and second exercise bars 520, 530 are set to -10 degrees by the exercise bar angle adjustment unit 550.

[0066] 15 to 17, the motion bar rotation unit 540 rotates the first and second motion bars 520 and 530 in opposite directions about the first and second rotation axes 523 and 533 to vary the left and right angles (e.g., -10 degrees, 0 degrees, 10 degrees, 20 degrees, etc.) of the first and second motion bars 520 and 530. To this end, the motion bar rotation unit 540 includes first and second brackets 541 and 542, a connecting plate 544, and first and second connecting bars 547 and 548.

[0067] The first and second brackets 541 and 542 are rotatably connected to the first and second rotation shafts 523 and 533, respectively, and rotate the first and second motion bar support parts 522 and 532, respectively, about the first and second rotation shafts 523 and 533. The connecting plate 544 is configured to rotate about its central axis by the motion bar angle adjuster 550.

[0068] The first and second connecting bars 547 and 548 connect the first and second brackets 541 and 542 to the connecting plate 544, and are configured to rotate the first and second brackets 541 and 542 about the first and second rotation axes 523 and 533 as the connecting plate 544 rotates. One end of the first connecting bar 547 is hingedly connected to one end of the connecting plate 544, and the other end of the first connecting bar 547 is hingedly connected to the first bracket 541. One end of the second connecting bar 548 is hingedly connected to the other end of the connecting plate 544, and the other end of the second connecting bar 548 is hingedly connected to the second bracket 542.

[0069] In order to minimize the angular deviation of the first and second motion bars 520, 530 when they rotate left and right, the distance between the tangent point 544a between the central axis of the connecting plate 544 and the first connecting bar 547 and the distance between the tangent point 544b between the central axis of the connecting plate 544 and the second connecting bar 548 are set differently, so that the tangent point 544b between the central axis of the connecting plate 544 and the second connecting bar 548 is located on an imaginary line, and the tangent point 544a with the first connecting bar 547 is located at an angle other than on the imaginary line. The imaginary line referred to above is a line that passes through the central axis of the connecting plate 544 in the longitudinal direction on the connecting plate 544.

[0070] The exercise bar angle adjuster 550 is configured to control the exercise bar rotation unit 540 to adjust the angles of the first and second exercise bars 520 and 530, and includes a grip 551 for adjusting the angle, a fixing pin 552 for fixing the angle, and a holder 554 with a number of angle adjustment holes 554a. When the fixing pin 552 is pulled up and separated from an existing angle adjustment hole 554a, and then released, the fixing pin 552 is pulled into another angle adjustment hole 554a by an elastic material (not shown), and the angle is fixed.

[0071] In this way, the angles of the first and second movement bars 520 and 530 can be adjusted by using the movement bar angle adjuster 550 to rotate the first and second brackets 541 and 542, the connecting plate 544, and the first and second movement bar support parts 522 and 532.

[0072] Figure 18 is a diagram showing bench 511 and swing axis support part 515 when swing axis 514 and third and fourth rotation axes 524, 534 share a rotation axis, Figure 19 is a diagram showing bench 511 and swing axis support part 515 in a state where the position of swing axis 514 has been adjusted so that the distance between swing axis 514 and third and fourth rotation axes 524, 534 is increased, and Figure 20 is a diagram showing bench 511 and swing axis support part 515 in a state where the position of swing axis 514 has been adjusted so that the distance between swing axis 514 and third and fourth rotation axes 524, 534 is maximized.

[0073] The bench 511 and the backrest 512 are configured to be swingable about a swing shaft 514 that is installed horizontally on the front side of the bench 511. The swing shaft support part 515 is connected to the main frame 510 and is configured to support the swing shaft 514 and adjust the position of the swing shaft 514. The swing shaft support part 515 is configured to adjust the position of the swing shaft 514 so that the swing shaft 514 and the third and fourth rotation shafts 524 and 534 share a common rotation axis as shown in FIG. 18, or so that the distance between the swing shaft 514 and the third and fourth rotation shafts 524 and 534 is changed as shown in FIGS. 19 and 20. The swing shaft support part 515 includes a swing shaft position adjustment part 516 that variably adjusts and fixes the distance between the swing shaft 514 and the third and fourth rotation shafts 524 and 534. The swing shaft position adjustment part 516 includes a number of holes 516a and fixing pins 516b that are installed on a side of the swing shaft support part 515. The position of the swing shaft 514 varies depending on the position of the hole 516a to which the fixing pin 516b is coupled.

[0074] 12 and 21, the swing angle adjustment unit 560 includes a swing angle adjustment lever 561 that allows the bench 511 and the backrest 512 to swing freely or fixes them at a certain angle, a fixing bracket 563 that is connected to the main frame 510 and includes a number of holes 563a to fix the swing angle adjustment lever 561, and an elastic part 565 that is provided between the main frame 510 and the backrest 512.

[0075] The swing angle adjustment lever 561 includes a grip 561a, an adjustment pin 561b that fixes the angle, a stator 561c that fixes the adjustment pin 561b after it is released, a first link 561d connected to the bottom of the swing angle adjustment lever 561, and an adjuster linker 561e that is connected between the bench 511 and the first link 561d and corrects the angle difference between the bench 511 and the first link 561d. When the adjustment pin 561b is separated from the hole 563a, free swing is permitted, and when the adjustment pin 561b is inserted into the hole 563a, the bench 511 and the backrest 512 are fixed at a certain angle (e.g., 5 degrees, 10 degrees, 15 degrees, 20 degrees, or 25 degrees).

[0076] When the fixed pin 516b is fixed away from the hole 563a by locking the stator 561c of the swing angle adjusting lever 561 and the bench 511 and the backrest 512 are allowed to swing freely, the bench 511 and the backrest 512 rotate together around the swing axis 514 when the first and second movement bars 520 and 530 rotate up and down based on the third and fourth rotation axes 524 and 534. Conversely, when the stator 561c of the swing angle adjusting lever 561 is unlocked and the fixed pin 516b is inserted and fixed in the hole 563a and the bench 511 and the backrest 512 are fixed at a certain angle, the bench 511 and the backrest 512 do not rotate when the first and second movement bars 520 and 530 rotate up and down based on the third and fourth rotation axes 524 and 534.

[0077] 22 and 23 are diagrams for explaining the free swing in the forward direction mode, and FIGS. 24 and 25 are diagrams for explaining the free swing in the reverse direction mode.

[0078] The first and second swing connectors 581 and 582 are rotatably connected to the bench 511 and the backrest 512, and the first and second swing brackets 585 and 586 are connected to the weight unit 570. When the barbell plate support unit 571, which is linked to the first and second exercise bars 520 and 530, rotates up and down, the first and second swing brackets 585 and 586 transmit the rotational force to the first and second swing connectors 581 and 582, allowing the bench 511 and the backrest 512 to rotate up and down in a forward or backward direction.

[0079] Free swing is performed in either forward mode or reverse mode. In forward mode, the bench 511 is set to the highest inclination angle (-5 degrees) as shown in FIG. 22. At this time, the spring is activated, reducing the load on the adjustment pin 561b, which is pushed down by the user's weight, allowing the swing angle adjustment lever 561 to be easily operated with little force. The first and second swing connectors 581 and 582 are then coupled to the rear holes 585a and 586a of the first and second swing brackets 585 and 586, and the adjustment pin 561b is separated from the fixing bracket 563 and fixed by the stator 561c. As shown in FIG. 23, when the first and second movement bars 520 and 530 are then raised, the bench 511 moves downward. When the first and second movement bars 520 and 530 are lowered, the bench 511 returns to its original position as shown in FIG. 22. At this time, since the adjustment pin 561b is disengaged from the fixed bracket 563, the swing angle adjustment lever 561 also swings together with the bench 511.

[0080] In the reverse mode, as shown in FIG. 24, the inclination angle of bench 511 is set to the lowest (-25 degrees). At this time, the spring is activated, reducing the load on adjustment pin 561b, which is pressed by the user's weight, allowing swing angle adjustment lever 561 to be easily operated with little force. Next, first and second swing connectors 581 and 582 are coupled to front holes 585b and 586b of first and second swing brackets 585 and 586, and adjustment pin 561b is separated from fixing bracket 563 and fixed by stator 561c. Then, as shown in FIG. 25, when first and second movement bars 520 and 530 are lifted, bench 511 moves upward. When first and second movement bars 520 and 530 are lowered, bench 511 returns to its original position as shown in FIG. 24. Since adjustment pin 561b is now disengaged from fixing bracket 563, swing angle adjustment lever 561 also swings along with bench 511.

[0081] Fig. 26 is a view showing an example of first and second swing brackets 585, 586 configured as an integrated unit, and Fig. 27 is a view showing another example of first and second swing brackets 585, 586 configured as separate units that move independently. Fig. 28 is a view showing an example of first and second swing connectors 581, 582 that are coupled to the first and second swing brackets 585, 586 of Fig. 26, and Fig. 29 is a view showing another example of first and second swing connectors 581, 582 that are coupled to the first and second swing brackets 585, 586 of Fig. 27.

[0082] 26, when the first and second swing connectors 581, 582 are configured as an integrated unit, the first and second swing brackets 585, 586 are provided with different structures to ensure space for simultaneous attachment and detachment of the first and second swing connectors 581, 582, as shown in Fig. 28, and space for attachment and detachment of the first swing connector 581 is provided at the front and rear ends of the first swing bracket 585. The first and second swing connectors 581, 582 are rotatably coupled to both sides of a bench support 513 that supports a bench 511.

[0083] In addition, in order to attach and detach the first and second swing connectors 581, 582 and the first and second swing brackets 585, 586, a grip (not shown) that can be pulled by attaching an elastic material 583 such as a spring to an axis for rotatingly connecting the swing connectors 581, 582 to the bench is provided inside at least one of the first and second swing connectors 581, 582.

[0084] The same fixing members as the rear holes 585a, 586a and the front holes 585b, 586b are included so that the fixing pins 585 of the first and second swing connectors 581, 582 are fixed to the left and right around the rotation axis of the first and second swing brackets 585, 586 in order for the bench 511 and the backrest 512 to rotate forward or backward.

[0085] In order for the bench 511 and the backrest 512 to rotate in the forward direction, the front holes 585b and 586b, which are left-side fixing members located on the left side of the rotation axis of the first and second swing brackets 585 and 586, are only located on the left side of the rotation axis even when the barbell plate support part 571 is lifted. In order to rotate in the reverse direction, the rear holes 585a and 586a, which are right-side fixing members located on the right side of the rotation axis of the first and second swing brackets 585 and 586, are only located on the right side of the rotation axis even when the barbell plate support part 571 is lifted. In order to rotate from the forward direction to the reverse direction, the front holes 585b and 586b, which are left-side fixing members located on the left side of the rotation axis of the first and second swing brackets 585 and 586, move to the right when the barbell plate support part 571 is lifted to a certain height.

[0086] 27, when the first and second swing connectors 581, 582 are configured to move independently, the first and second swing brackets 585, 586 are provided with the same structure as shown in Fig. 29 for independent attachment and detachment to the first and second swing connectors 581, 582. In this case, a grip 584, a fixing pin 585, and an elastic material (not shown) that can be pulled toward the inside of the first and second swing connectors 581, 582 for attachment and detachment to and from the first and second swing connectors 581, 582 and the first and second swing brackets 585, 586 are further included.

[0087] When the first and second swing connectors 581, 582 are configured as an integrated unit, if the distance between the rotation center of the first and second swing connectors 581, 582 and the left fixing member of the first and second swing connectors 581, 582 is the same as the distance between the rotation center of the first and second swing connectors 581, 582 and the right fixing member of the first and second swing connectors 581, 582, the first and second swing connectors 581, 582 are configured in an I-shape, and if the distance between the rotation center of the first and second swing connectors 581, 582 and the left fixing member of the first and second swing connectors 581, 582 is not the same as the distance between the rotation center of the first and second swing connectors 581, 582 and the right fixing member of the first and second swing connectors 581, 582, the first and second swing connectors 581, 582 are configured in a V-shape or a W-shape.

[0088] The present invention is not limited to the above-described embodiments and the accompanying drawings, and various modifications and applications not exemplified are possible within the scope of the technical idea of ​​the present invention, and the substitution of components and modifications to other equivalent embodiments may be possible. Therefore, content related to modifications and applications of the features of the present invention should be interpreted as being included within the scope of the present invention.

Claims

1. The mainframe and first and second movement bars hingedly coupled to one side of the main frame so that a user can push or pull them with a grip; a motion bar rotation unit that rotates the first and second motion bars in opposite directions relative to the longitudinal central axes of the first and second motion bars; The motion bar rotation part is a connecting plate including a fixing pin and rotatably connected to the main frame between the first and second motion bars; a holder including a plurality of angle adjustment holes and configured to fix the fixing pin inserted into any of the angle adjustment holes; a first connecting bar and a second connecting bar that connect the first and second exercise bars to the connecting plate and rotates the first and second exercise bars about the central axis by rotating the connecting plate.

2. 2. The weight training apparatus of claim 1, wherein one end of the first connecting bar is hingedly connected to an upper portion of one end of the connecting plate, the other end of the first connecting bar is hingedly connected to a first bracket fixed to the first exercise bar, one end of the second connecting bar is hingedly connected to a lower portion of one end of the connecting plate, and the other end of the second connecting bar is hingedly connected to a second bracket fixed to the second exercise bar.

3. 3. The weight training apparatus of claim 2, wherein angle A of the first bracket inclined from the horizontal and angle C of the second bracket inclined from the horizontal are the same angle facing each other, and angles A and C are angles at which deviation is minimized when the angle of the grip is adjusted.

4. The weight training apparatus of claim 2, wherein angle B of the connecting plate, which is the angle between an imaginary line connecting the tangent point of the rotation axis of the connecting plate and the first connecting bar and an imaginary line connecting the tangent point of the rotation axis of the connecting plate and the second connecting bar, is an angle at which deviation is minimized when the angle of the grip is adjusted.

4. first and second connecting brackets respectively coupled to the first and second motion bars so that the weight unit does not rotate in conjunction with the rotation of the first and second motion bars; The vehicle further includes third and fourth connecting bars that connect weights to the first and second connecting brackets, respectively. the first and second connecting brackets are arranged in pairs at an upper and lower position at a predetermined interval so that the first and second stoppers can be assembled thereto, and each of the first and second connecting brackets includes one or more elongated holes, the elongated holes being arc-shaped and sharing a central longitudinal axis of the first and second motion bars, and having a thickness such that a fixing pin of the first and second stoppers can be inserted therein; the first and second stoppers are in the form of pipes having a predetermined thickness and a hollow center, and a length such that they can be inserted between the upper and lower brackets of the first and second connecting brackets, and the fixing pin of the first and second stoppers passes through the center of the pipes to be fixed; 2. The weight training device according to claim 1, wherein the third and fourth connecting bars are fitted with spherical bearings at their upper and lower ends, which are rotatable in the forward and backward directions and left and right directions, and are attached to the first and second stoppers and the weight portion.

5. The mainframe and first and second movement bars hingedly coupled to one side of the main frame so that a user can push or pull them with a grip; a motion bar rotation unit that rotates the first and second motion bars in opposite directions relative to the longitudinal central axes of the first and second motion bars; The motion bar rotation part is a first bracket fixedly coupled to one end of the first motion bar so as to rotate with the first motion bar; a second bracket fixedly coupled to one end of the second motion bar, the second bracket including a fixed pin, for rotation with the second motion bar; a holder including a plurality of angle adjustment holes and configured to fix the fixing pin inserted into any of the angle adjustment holes; a connecting bar connecting the first bracket and the second bracket and transmitting a rotational force of the second bracket to the first bracket so that the first and second exercise bars rotate about the central axis by rotation of the second bracket.

6. a distance (d) from the central axis of the first motion bar to the contact point of the first bracket and the connecting bar and a distance (d) from the central axis of the second motion bar to the contact point of the second bracket and the connecting bar are lengths that minimize deviation when adjusting the angle of the grip, the angle of the first bracket and the angle of the second bracket inclined from the horizontal direction are angles that minimize deviation when adjusting the angle of the grip, 6. The weight training device of claim 5, wherein one end of the connecting bar is hingedly connected to one end of the first bracket, and the other end of the connecting bar is hingedly connected to a lower portion of the second bracket.

7. The mainframe and first and second movement bars hingedly coupled to one side of the main frame so that a user can push or pull them with a grip; a first bracket fixedly coupled to one end of the first motion bar, the first bracket including a first fixed pin, for rotation therewith; a second bracket fixedly coupled to one end of the second motion bar, the second bracket including a second fixed pin, for rotation with the second motion bar; a first holder including a plurality of first angle adjustment holes and configured to fix the first fixing pin inserted into any of the first angle adjustment holes; a second holder including a plurality of second angle adjustment holes and configured to fix the second fixing pin inserted into any of the second angle adjustment holes; The first exercise bar rotates about a longitudinal central axis of the first exercise bar by rotating the first bracket, and the second exercise bar rotates about a longitudinal central axis of the second exercise bar by rotating the second bracket.

8. The mainframe and first and second movement bars hingedly coupled to one side of the main frame so that a user can push or pull them with a grip; a motion bar rotation unit that rotates the first and second motion bars in opposite directions relative to the longitudinal central axes of the first and second motion bars; The motion bar rotation part is a first gear fixedly coupled to one end of the first motion bar for rotation therewith; a second gear fixedly coupled to one end of the second motion bar for rotation therewith; third and fourth gears rotatably coupled to the main frame between the first and second gears and configured to transmit a rotational force to the first and second gears by rotating while meshing with each other; a holder including a plurality of angle adjustment holes, the holder being configured to insert and fix a fixing pin provided on at least one of the third and fourth gears into any of the angle adjustment holes.

9. The mainframe and first and second exercise bars that are rotatable left and right about first and second vertical rotation axes and up and down about third and fourth horizontal rotation axes, respectively, and that are configured to be pushed and pulled by a user; a motion bar rotation unit that rotates the first and second motion bars in opposite directions relative to the first and second rotation axes; a motion bar angle adjusting unit for controlling the motion bar rotating unit to adjust the angles of the first and second motion bars; The motion bar rotation part is first and second brackets rotatably coupled to the main frame about the first and second rotation axes, and configured to rotate the first and second motion bars about the first and second rotation axes, respectively; a connecting plate that rotates around a central axis by the exercise bar angle adjusting unit; first and second connection bars connecting the first and second brackets and the connection plate to each other and rotating the first and second brackets about the first and second rotation axes by rotation of the connection plate; A weight training device comprising:

10. A bench and a backrest configured to be swingable with respect to a swing axis; a swing shaft support unit that supports the swing shaft and includes a swing shaft position adjustment unit that adjusts the position of the swing shaft so that the swing shaft and the third and fourth rotation shafts share a common rotation axis or so that the distance between the swing shaft and the third and fourth rotation shafts is changed and fixed; 10. The weight training device of claim 9, further comprising a swing angle adjuster that allows the bench and backrest to swing freely or fixes them at a certain angle.

11. The swing angle adjustment unit is a swing angle adjustment lever that allows the bench and backrest to swing freely or fixes them at a certain angle; a fixing bracket coupled to the main frame for fixing the swing angle adjustment lever; The seatback includes an elastic portion provided between the main frame and the backrest.

11. The weight training apparatus of claim 10, wherein the swing angle adjustment lever includes a grip, an adjustment pin for fixing the angle, a stator for fixing the adjustment pin after separating it, a first link, and an adjuster linker for correcting an angle difference between the bench and the first link.

12. first and second swing connectors, either integral or separate, rotatably coupled to the bench and backrest; 11. The weight training apparatus of claim 10, further comprising first and second swing brackets that transmit a rotational force to the first and second swing connectors when the barbell plate supporters linked with the first and second exercise bars rotate up and down, thereby allowing the bench and backrest to rotate up and down in a forward or backward direction.

13. When the first and second swing connectors are configured as an integrated unit, the first and second swing brackets are provided with different structures to ensure a space for simultaneous attachment and detachment of the first and second swing connectors, and the first and second swing connectors are rotatably coupled to a bench support base that supports the bench, In order to detach the first and second swing connectors from the first and second swing brackets, a grip is provided inside at least one of the first and second swing connectors, the grip having an elastic material attached to a shaft for rotatably connecting the swing connector to the bench, and the grip can be pulled; When the first and second swing connectors are configured to move independently, the first and second swing brackets are provided with the same structure for independently connecting and disconnecting with the first and second swing connectors; The bench and the backrest may further include a fixing member for fixing the first and second swing connectors to the left and right around the rotation axis of the first and second swing brackets so that the bench and the backrest can rotate forward or backward.

13. The weight training apparatus of claim 12, wherein a left fixing member located on the left side of the rotation axis of the first and second swing brackets for rotating the bench and the backrest in a forward direction only stays to the left side of the rotation axis even when the barbell plate support is lifted, and a right fixing member located on the right side of the rotation axis of the first and second swing brackets for rotating in a reverse direction only stays to the right side of the rotation axis even when the barbell plate support is lifted, and the left fixing member located on the left side of the rotation axis of the first and second swing brackets for rotating from a forward direction to a reverse direction moves to the right when the barbell plate support is lifted to a predetermined height.

14. 14. The weight training device of claim 13, wherein when the first and second swing connectors are configured as an integrated unit, if the distance between the rotation center of the first and second swing connectors and the left fixing member of the first and second swing connectors is the same as the distance between the rotation center of the first and second swing connectors and the right fixing member of the first and second swing connectors, the first and second swing connectors are configured as an I-shape, and if the distance between the rotation center of the first and second swing connectors and the left fixing member of the first and second swing connectors is not the same as the distance between the rotation center of the first and second swing connectors and the right fixing member of the first and second swing connectors, the first and second swing connectors are configured as a V-shape or a W-shape.

15. 10. The weight training apparatus of claim 9, wherein one end of the first connecting bar is hingedly connected to an upper end of the connecting plate, the other end of the first connecting bar is hingedly connected to the first bracket, one end of the second connecting bar is hingedly connected to a lower end of the connecting plate, and the other end of the second connecting bar is hingedly connected to the second bracket.

16. 16. The weight training apparatus of claim 15, wherein a distance between a tangent point between the central axis of the connecting plate and the first connecting bar and a distance between a tangent point between the central axis of the connecting plate and the second connecting bar are set differently from each other to minimize an angular deviation of the first and second exercise bars when the first and second exercise bars rotate left and right, and the tangent point between the central axis of the connecting plate and the second connecting bar is located on an imaginary line, and the tangent point between the central axis of the connecting plate and the first connecting bar is located at an angle other than on the imaginary line.

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