Fitness machines for training the upper body

Abstract

A fitness machine (M) for training the upper body of a user includes: a support frame (1); a first lever (2) connected to the support frame (1) and capable of rotating about a first fixed pivot (F1) about a rotation axis (d) in a first rotation direction (R1) from a starting stroke position to an ending stroke position or vice versa; a second lever (3) connected to the support frame (1) and capable of rotating about a second rotation direction (R2) in the opposite direction from a starting stroke position to an ending stroke position or vice versa; a resistance unit (5) capable of providing resistance during the rotation of the levers (2, 3) and operable by the user for exercise; and a transmission system (6) connecting the levers (2, 3) to the resistance unit (4) via cables (C, C''), wherein the starting stroke position of the levers (2, 3) can be adjusted by an adjustment device that can be activated by a force applied by the user.

Description

Technical Field

[0001] This invention relates to a fitness machine for training the upper body, particularly for training the anterior and posterior deltoids, back muscles, latissimus dorsi, pectoral muscles, triceps, and trapezius.

[0002] More specifically, the present invention relates to a fitness machine of the type described herein, which is specially designed and manufactured to allow the user to train in a generally upright position, performing arm exercises, particularly lateral raises, front raises, rear raises with the torso leaning forward, and chest flyes and shoulder flyes at different angles, with a constant load throughout the exercise, without loss of resistance to lifting the load, allowing for high muscle stress.

[0003] The following description is directed to a fitness machine for training the upper body, which includes a pair of levers rotatably coupled to the frame of the fitness machine and connected to a resistance load unit for exercises such as lateral raises and chest flyes and shoulder flyes, but it should be clearly understood that it should not be considered as limited to this particular purpose. Background Technology

[0004] Currently, it is known that in order to train upper muscle groups such as the anterior and posterior deltoids, latissimus dorsi, pectoralis major, triceps surae, and trapezius, cables or very bulky machines that need to be fixed to a frame or support are used to allow the user to exercise with his / her arms, but these devices require a lot of space so that the user's arms can be fully extended and moved.

[0005] More compact machines are also known that can be placed against a wall and allow for training of upper body muscles. These compact machines include pairs of levers rotatably coupled to the machine frame, allowing for more limited space requirements.

[0006] These known machines typically have a mechanism for adjusting the range of motion (ROM) of the arm during exercise, which requires the use of adjustment pins.

[0007] The connection between the lever and the machine frame is achieved by a circular element (such as a circular flange) with a receiving portion for receiving the adjusting pin at the position selected by the user.

[0008] A known drawback of the machine is that the adjusting pins are usually located on the periphery of the circular components.

[0009] This makes operation difficult for the user, especially when the two levers (and therefore the circular flanges) are arranged side by side and the user's operating space is limited, making it difficult to move the adjusting pin along the periphery of the circular flanges.

[0010] Furthermore, in known machines, the support for the user's forehead is typically positioned between two circular flanges. In this situation, the user's hand may accidentally become stuck in the narrow space between one of the two circular flanges and the forehead support.

[0011] In view of the shortcomings and unresolved problems of the prior art, the object of the present invention is to provide a fitness machine including a ROM adjustment element that can be quickly accessed by the user.

[0012] Another object of the present invention is to provide a fitness machine including a ROM adjustment element that is easy for the user to access and therefore does not cause accidental injury during adjustment.

[0013] Therefore, the technical problem on which this invention is based is to provide a fitness machine that allows adjustment of the exercise ROM in a simple and safe manner for the user, and allows the user to adjust the ROM through the device without their arms overlapping while gripping the lever to make it move. Summary of the Invention

[0014] The basic idea of ​​this invention is to provide a fitness machine that allows users to adjust the starting stroke position of the exercise by means of an adjustment device arranged in the center of the connection area between the lever and the support frame, thereby adjusting the ROM.

[0015] Specifically, the present invention aims to provide a fitness machine for training the upper body of a user, comprising: a support frame for supporting the fitness machine on the ground or a base; a first lever, grippable by a user, connected to a first fixed pivot of the support frame, and capable of rotating about the first fixed pivot in a first direction of rotation about a rotation axis from a user-adjustable starting stroke position to an ending stroke position or from an ending stroke position to a starting stroke position; a second lever, connected to a second fixed pivot of the support frame, and capable of rotating about the second fixed pivot in a second direction of rotation opposite to the first direction of rotation about a rotation axis from a user-adjustable starting stroke position to an ending stroke position or from an ending stroke position to a starting stroke position; a resistance unit capable of providing resistance during rotation of the first and second levers, and operable by the user through the first and second levers for fitness exercises; and a transmission system capable of connecting the first and second levers to the resistance unit via cables, wherein the starting stroke positions of the first and second levers are adjustable by an adjustment device activated by a force applied by the user, the vector of which lies on the rotation axis.

[0016] According to the present invention, the adjusting device includes an actuation component whose extension axis is located on the rotation axis.

[0017] Preferably, according to the present invention, the adjusting device includes a selection component whose extension axis is located on an axis parallel to the rotation axis, and the adjusting device includes an actuation component whose extension axis is located on the rotation axis, wherein the extension axes of the selection component and the extension axes of the actuation component are different from each other and are parallel to each other.

[0018] Still according to the invention, the adjusting device includes a selection element and an actuation element that can be activated by an actuation assembly whose extension axis is located on the rotation axis.

[0019] Still according to the invention, the adjusting device includes an actuating element and a selecting element, which are connected to each other via an actuating assembly whose extended axis is located on the rotation axis.

[0020] According to the present invention, the first and second levers can be connected to the support frame via first and second fixing groups, each fixing group including a cover element having first and second through holes formed on its surface, and the adjustment device can be actuated by actuating elements inserted into the first and second through holes respectively.

[0021] Preferably, according to the invention, the first and second through holes are formed at the center of the surface of each covering element.

[0022] Still according to the invention, the transmission system includes a first selector disc having a plurality of slots formed on its surface for connection to the first lever, the transmission system includes a second selector disc having a plurality of slots formed on its surface for connection to the second lever, and the adjusting device includes a selector pin capable of engaging and disengaging with each of the plurality of slots to adjust the starting stroke position of the first and second levers.

[0023] Still according to the invention, the adjustment device includes: a knob that can be gripped by a user and is movable toward and away from the support frame along the axis of rotation; a rod whose extension axis is located on the axis of rotation and connected to the knob; a lever that can be actuated by the rod; and a selection pin configured to select the starting stroke position of the first and second levers and actuated by the levers, the extension axis of which is different from and parallel to the extension axis of the rod.

[0024] According to the invention further, the rod is rotatably connected inside the knob so as to rotate freely about the axis of rotation together with the first lever, while the knob remains stationary in the user's hand.

[0025] Preferably, according to the invention, the rod is slidably inserted into a first shaft connecting the adjusting device and the transmission system along the axis of rotation, such that it can translate along the axis of rotation.

[0026] Still according to the invention, the lever includes a first end connected to the first fixing group and a second end connected to the selection pin.

[0027] Still according to the invention, the selector pin is connected to the second end of the lever via a resilient safety element.

[0028] According to the present invention, the adjustment device includes: a knob with a ring that can be pressed by a user along the axis of rotation toward the support frame; and a lever that can be activated by the knob with the ring and can control the movement of the selection pin.

[0029] Preferably, according to the invention, the lever is fixed to the plate at one end and connected to the selector pin at the other end by a resilient safety element.

[0030] Finally, according to the present invention, the first and second levers can be connected to the support frame by a first fixing group and a second fixing group, respectively. When they are arranged along a vertical axis perpendicular to the ground in a position fully raised toward the upper end of the support frame, the first and second levers can be returned toward the support frame by an elastic device. Attached Figure Description

[0031] In the attached diagram:

[0032] Figure 1 An isometric view of a fitness machine for training the upper body, which is the subject of this invention, is shown.

[0033] Figure 2 Show Figure 1 Side view of the machine shown;

[0034] Figure 3 Show Figure 1 Top view of the machine shown;

[0035] Figure 4 Show Figure 1 The front view of the machine is shown, with the lever in the operating position;

[0036] Figure 5 A side view of the adjustment assembly of the machine in the engaged position is shown;

[0037] Figure 6 A side view showing the adjustment components of the machine in the disengaged position;

[0038] Figure 7 An exploded view of the components of the machine according to the first embodiment is shown;

[0039] Figure 8 An exploded view of the components of the machine according to the second embodiment is shown;

[0040] Figure 9An isometric view of a fitness machine including components according to a second embodiment is shown; and

[0041] Figure 10 Show Figure 9 The machine shown is shown in top view. Detailed Implementation

[0042] refer to Figures 1-7 This describes a fitness machine M for training the upper body, particularly for arm exercises such as lateral raises, front raises, back raises with a forward torso tilt, and chest flyes and shoulder flyes at different angles.

[0043] The fitness machine M basically includes: a support frame 1 for supporting the fitness machine M on the ground or base; a first lever 2 and a second lever 3, which the user can use to perform fitness exercises, and the levers are connected to the resistance unit 5 through a transmission system 6.

[0044] Specifically, the support frame 1 extends primarily along the Z-axis, which is parallel to the Cartesian coordinate system XYZ, to allow the user to exercise in a generally upright position.

[0045] The support frame 1 also includes a platform 11, which is supported on the ground so that users can stand on it to exercise.

[0046] To perform arm exercises, especially lateral raises, front raises, back raises with the torso leaning forward, and chest flyes and shoulder flyes at different angles, the user can use the first lever 2 and the second lever 3 with both arms simultaneously, or use only one arm at a time, using only one lever 2 or 3.

[0047] The first lever 2 can be gripped by the user and connected to the support frame 1 at the first fixed pivot F1, so that it can rotate about the first fixed pivot F1 according to the first rotation direction R1, about the rotation axis d parallel to the X-axis of the Cartesian coordinate system XYZ, from the user-adjustable starting stroke position to the ending stroke position or from the ending stroke position to the starting stroke position, and depict the first angle α.

[0048] Specifically, each first angle α corresponds to the range of motion of the user's arm, which is defined as the range of motion (ROM). The larger the first angle α, the greater the range of motion of the user's arm, that is, the greater the ROM of the exercise.

[0049] The first lever 2 includes a first end 21 mounted on the first fixed pivot F1 and a free second end 22 that can be gripped by the user.

[0050] Special Reference Figure 7The connection between the first lever 2 and the support frame 1 is achieved through the first fixing group 23. The first fixing group 23 includes a first circular portion 231, on which the first lever 2 is fixed by a first bracket 231a and keyed to the first shaft 234.

[0051] An elastic device, such as a spring (not shown), is arranged between the first lever 2 and the first bracket 231a, particularly when the first lever 2 is positioned fully raised towards the upper end of the support frame 1 (e.g., Figure 4 As shown), the first lever 2 is returned toward the support frame 1 to prevent the first lever 2 from accidentally falling downwards, which could injure the user.

[0052] The first fixing assembly 23 also includes a cover element 233, which is circular and has a through hole 233 at the center of its outer surface. a .

[0053] Similarly, the second lever 3 can be gripped by the user and connected to the support frame 1 at the second fixed pivot F2, thereby enabling it to rotate about the second fixed pivot F2 according to the second rotation direction R2, about the rotation axis d parallel to the X-axis of the Cartesian coordinate system XYZ, from a user-adjustable starting stroke position to an ending stroke position or from an ending stroke position to a starting stroke position, and to depict the second angle β.

[0054] Specifically, each second angle β corresponds to the range of motion of the user's arm, which is defined as the range of motion (ROM). The larger the amplitude of the second angle β, the greater the range of motion of the user's arm, that is, the greater the ROM of the exercise.

[0055] The second lever 3 includes a first end 31 mounted on the second fixed pivot F2 and a free second end 32 that can be gripped by the user.

[0056] The connection between the second lever 3 and the support frame 1 is achieved through the second fixing group 33. The second fixing group 33 includes a second circular portion 331, on which the second lever 3 is fixed by a second bracket 331a and keyed to the second shaft 334.

[0057] An elastic device, such as a spring (not shown), is arranged between the second lever 3 and the second bracket 331a, particularly when the second lever 3 is positioned fully raised towards the upper end of the support frame 1 (e.g., Figure 4 (As shown by the dotted line), the second lever 3 is returned toward the support frame 1 to prevent the second lever 3 from accidentally falling downwards, which could injure the user.

[0058] The second fixing group 33 also includes a cover element 333, which is circular and has a through hole 333a at the center of its outer surface.

[0059] The heights of the first lever 2 and the second lever 3 are adjustable by moving away from and toward the platform 11 according to the direction b of the Z-axis parallel to the Cartesian coordinate system XYZ, so that they slide through the H-shaped handle on the support frame 1 (particularly along the first column 12 and the second column 13).

[0060] The height adjustment of levers 2 and 3 is achieved by inserting a locking pin 14 into a perforated rod 15 arranged parallel to the first post 2 (or alternatively parallel to the second post 3). The locking pin 14 allows levers 2 and 3 to be locked at the desired height.

[0061] The first lever 2 and the second lever 3 can also be moved by the user toward and away from the support frame 1 along the direction d.

[0062] A bearing S is arranged between the first lever 2 and the second lever 3, which is connected to the support frame 1 via a connecting element S1 that allows the user to lean on his / her forehead while exercising by leaning his / her torso towards the support frame 1.

[0063] A screen or display D is also arranged between the first lever 2 and the second lever 3, which is fixed to the support frame 1 by an arm D1, for displaying training parameters, such as the number of exercise repetitions, the selected load, etc.

[0064] The resistance unit 5 is a gravity resistance device, such as a counterweight assembly.

[0065] However, without departing from the scope of protection of this invention, the resistance unit 5 may also be an electromagnetic device, such as an electric motor, capable of simulating different types of resistance, such as gravity, elasticity, and viscous resistance.

[0066] The transmission system 6 includes a cable C that connects the first lever 2 and the second lever 3 to the resistance unit 5, which provides resistance according to the load selected by the user.

[0067] The transmission system 6 includes a first selection disc 60, a first main pulley 61, a set of auxiliary pulleys 62 arranged near the platform 11, and a pulley 69 integrated with the counterweight block group 5, for returning the cable C that connects the first main pulley 61 to the resistance unit 5.

[0068] The first selector disk 60 and the first main pulley 61 are bonded to the first hub 67, which rotates around the first shaft 234 via a bearing connection. Therefore, the first selector disk 60, the first main pulley 61, and the first hub 67 are integral to each other.

[0069] A first counterweight 63 is also bonded to the first shaft 234, which can balance the weight of the first lever 2, especially when returning it to the lowered position at the end of the exercise.

[0070] Multiple slots A1, A2, A3, ..., A are formed on the first selection disk 60. n It is used to adjust the starting stroke position of the first lever 2, as will be described in detail below.

[0071] The transmission system 6 also includes a second selection disc 64 and a second main pulley 65 for returning the cable C that connects the transmission system 6 to the resistance unit 5.

[0072] The second selector disc 64 and the second main pulley 65 are keyed to the second hub 68, which rotates about the second shaft 334 via a bearing connection. Therefore, the second selector disc 64, the second main pulley 65, and the second hub 68 are integral with each other.

[0073] A second counterweight 66 is also bonded to the second shaft 334, which can balance the weight of the second lever 3, especially when returning it to the lowered position at the end of the exercise.

[0074] The second selection disk 64 has multiple slots A1, A2, A3, ..., A n It is used to adjust the starting stroke position of the second lever 3, as will be described in detail below.

[0075] The cable C is fixed at its first end to the first main pulley 61 and is engaged with the set of auxiliary pulleys 62 and the pulley 69 which is integrated with the counterweight block group 5, until it reaches the second main pulley 65, where the second end of the cable C is fixed.

[0076] refer to Figures 5-7 The adjustment of the starting stroke positions of the first lever 2 and the second lever 3 (and therefore the first angle α and the second angle β) for each individual exercise is achieved by an adjustment device 4, which is mounted on both the first lever 2 and the second lever 3. Specifically, the adjustment device 4 is fixed to the first circular portion 231 of the first fixing group 23 by the first bracket 231a and to the second circular portion 331 of the second fixing group 33 by the second bracket 331a.

[0077] Specifically, refer to the first lever 2 for explanation, but the description of the second lever 3 remains unchanged.

[0078] The adjusting device 4 includes an actuating element, such as a knob 41, a selection pin 42, and a lever 43 controlling the position of the pin 42. The lever is actuated by the knob 41 via an actuating assembly (e.g., a rod 46) slidably inserted into the first shaft 234, allowing it to translate along the rotation axis d. The rod 46 is rotatably connected inside the knob 41 so that it can rotate freely about the rotation axis d together with the first lever 2, while the knob 41 remains stationary.

[0079] The selection pin 42 extends along an axis parallel to the rotation axis d. Furthermore, the selection pin 42 is inserted into a hollow receiving portion 232 present on the first circular portion 231.

[0080] The rod 46 extends primarily along the rotation axis d, and specifically, its extension axis is located on the rotation axis d. The extension axis of the selection pin 42 is parallel to and does not coincide with the extension axis of the rod 46, that is, the extension axis of the selection component 42 and the extension axis of the actuation component 46 are different from each other and parallel to each other.

[0081] The selection pin 42 can follow the actuation of the knob 41, moving along the X-axis d parallel to the Cartesian coordinate system XYZ, towards the support frame 1 and in the opposite direction (away from the support frame 1), and interacting with the plurality of slots A1, A2, A3, ..., A n Each slot engages and disengages.

[0082] Specifically, the knob 41 is inserted into the through hole 233a and can be gripped by the user to move the adjustment device 4 from the engaged position to the disengaged position.

[0083] At the engagement position, the selector pin 42 engages with the plurality of slots A1, A2, A3, ..., A n At least one groove is engaged, and the knob 41 is partially inserted into the through hole 233a, facing the support frame 1.

[0084] In this position, the first circular portion 231, the first selection disk 60, and the first main pulley 61 are integrated together and can rotate together with the first lever 2.

[0085] In the disengaged position, the selector pin 42 engages with the plurality of slots A1, A2, A3, ..., A n The groove in the hole is disengaged, and the knob 41 is pulled out of the through hole 233a.

[0086] In this position, the circular portion 231 is disconnected from the first selection disk 60, so the circular portion 231 can rotate together with the first lever 2, while the first selection disk 60 and the first main pulley 61 remain stationary.

[0087] The lever 43 includes a first end 43a and a second end 43b. The first end 43a is rotatably connected to the first bracket 231a of the first circular portion 231, the second end 43b is connected to the selector pin 42 via an elastic safety element (e.g., a safety spring 45), and the centerline of the lever 43 is rotatably connected to the rod 46 via a pin 47.

[0088] Furthermore, the selector pin 42 is surrounded by a first spring 44, which is also inserted into the hollow receiving portion 232.

[0089] Specifically, when selecting pin 42 from slot A n When pulled out, the first spring 44 can be compressed and extended to push the selector pin 42 into slot A. n The joining position in.

[0090] The safety spring 45 is also advantageously used to prevent the selector pin 42 from slipping out of slot A when the knob 41 is accidentally actuated during exercise. n Pull it out. If knob 41 is pulled during exercise, safety spring 45 will extend, thus preventing selector pin 42 from accidentally disengaging from its engaged slot A. n Pull it out from the middle.

[0091] The knob 41 is connected to the lever 434 in an idle manner, such that when the lever 434 rotates during the displacement of the first lever 2, the knob 41 remains stationary in the user's hand.

[0092] refer to Figures 8-10 In the second embodiment, the adjustment device 4' differs only in that it includes an actuation element, such as a knob 41' with a ring and a tilting lever 43' actuated by the knob 41' with the ring.

[0093] The selection pin 42 is actuated by the ring-shaped knob 41', moving along the X-axis (d) parallel to the Cartesian coordinate system XYZ towards the support frame 1, and engaging with the plurality of slots A1, A2, A3, ..., A n Each slot engages and disengages.

[0094] Specifically, the ringed knob 41' is inserted into the through hole 233a, can be connected to the cover element 233 by the teeth of the ring nut, and can be pressed by the user to displace the adjustment device 4' from the engaged position to the disengaged position.

[0095] At the engagement position, the selector pin 42 engages with the plurality of slots A1, A2, A3, ..., A n At least one groove engages, and the ringed knob 41' is inserted into the through hole 233a, toward the support frame 1.

[0096] In this position, the first circular portion 231 and the first selection disk 60 are integral to each other and can rotate together with the first lever 2.

[0097] In the disengaged position, the selector pin 42 engages with the plurality of slots A1, A2, A3, ..., A n The groove in the middle is disengaged, and the ringed knob 41' comes out from the through hole 233a.

[0098] The lever 43' is fixed to the plate 431', which is mounted on the first bracket 231a or the second bracket 331a.

[0099] The lever 43' is fixed to the plate 431' at one end and connected to the selector pin 42 at the other end via the safety spring 45 and the first spring 44.

[0100] When the user presses the ringed knob 41' toward the support frame 1, the plate 431' returns to the lever 43', which in turn returns to the selector pin 42 via the first spring 44, causing the selector pin 42 to move from the plurality of slots A1, A2, A3, ..., A n It was pulled out of one of the slots.

[0101] The operation of the fitness machine M for training the upper body, which is the objective of this invention, is as follows.

[0102] When a user intends to perform arm exercises, especially lateral raises, front raises, back raises with a forward torso tilt, and chest flyes and shoulder flyes at different angles, he / she steps onto the platform 11 and uses the fitness machine M.

[0103] Users first set the exercise load by selecting a weight from the set of weights in resistance unit 5.

[0104] The user then adjusts the exercise ROM using the adjustment device 4 of the first lever 2 and the second lever 3, or only one of them, depending on the exercise to be performed. For simplicity, the operation of the adjustment device 4 applied to the first lever 2 is described here, but the description of the second lever 3 remains unchanged. Specifically, the user pulls the knob 41 towards themselves, away from the support frame 1 along the axis of rotation d.

[0105] The lever 46 is returned by the knob 41, which in turn causes the lever 43 to move. Specifically, the first end 43a of the lever 43 rotates on the first bracket 231a, so the lever 43 moves about the pin 47, while the second end 43b of the lever 43 returns. As a result, the first spring 44, by compression, pulls the selector pin 42 away from the support frame 1 in the direction of the rotation axis d, thereby removing it from the previously inserted slot A. nPull out. The user grasps the free end 22 of the first lever 2, causing it to rotate around the rotation axis d according to the first rotation direction R1 until the required angular position for exercise is reached, while firmly gripping the knob 41. Once the required angular position, i.e., the starting stroke position, is reached, the user releases the knob 41 toward the support frame 1. As a result, the lever 46 pushes the lever 43 toward the support frame 1, and the first spring 44 extends and pushes the selector pin 42, causing it to engage with the plurality of slots A1, A2, A3, ..., A n In another slot.

[0106] The user exercises by rotating the first lever 2 from the starting stroke position to the ending stroke position according to the first rotation direction R1. By moving the first lever 2 from the starting stroke position, the first lever 2, the first fixed assembly 23, the first selection disc 60, the first main pulley 61, the lever 43, and the rod 46 rotate together, allowing the user to increase the selected load on the resistance unit 5 by pushing the first lever from the starting stroke position to the ending stroke position, and vice versa. At the end of the exercise, the first counterweight 63 returns the first lever 2 to the starting stroke position.

[0107] The second embodiment of the adjustment device 4' differs only in that the user presses the ringed knob 41' in a direction parallel to the rotation axis d toward the support frame 1 to move the selection pin 42 from its inserted slot A. n Pull it out from the middle.

[0108] As can be clearly seen from the above description, the advantage of the adjustment device included in the target fitness machine of the present invention is that it allows the user to adjust the starting and ending stroke positions of the lever in an instant, simple and harmless manner, thereby adjusting the ROM. The user can actuate the adjustment device with one hand and move the lever with the other hand, and these hands do not cross each other when the lever rotates around the axis of rotation.

[0109] It is equally clear that the adjustment device can also be used in other exercise machines that include exercise elements that are rotatably coupled to a support frame and connected, for example, via cables, to a resistance unit.

[0110] Obviously, those skilled in the art can make various modifications and variations to the above-mentioned support to meet occasional and specific needs, all of which fall within the scope of protection of the present invention as defined by the appended claims.

Claims

1. A fitness machine (M) for training the upper body of a user, comprising: Support frame (1) for supporting the fitness machine (M) on the ground or base, The first lever (2) can be gripped by the user, is connected to the support frame (1) at the first fixed pivot (F1), and can rotate about the first fixed pivot (F1) around the rotation axis (d) according to the first rotation direction (R1) from the start stroke position adjustable by the user to the end stroke position or from the end stroke position to the start stroke position. The second lever (3) is connected to the support frame (1) at the second fixed pivot (F2) and is capable of rotating about the second fixed pivot (F2) around the rotation axis (d) in a second rotation direction (R2) opposite to the first rotation direction (R1) from the start stroke position to the end stroke position or from the end stroke position to the start stroke position, which can be adjusted by the user. The resistance unit (5) is capable of providing resistance during the rotation of the first lever (2) and the second lever (3), and can be operated by the user through the first lever (2) and the second lever (3) for fitness exercises. The transmission system (6) can connect the first lever (2) and the second lever (3) to the resistance unit (5) respectively via a cable (C). The fitness machine (1) is characterized in that the starting stroke positions of the first lever (2) and the second lever (3) can be adjusted by an adjusting device (4, 4') which can be activated by a force applied by the user and vectored on the axis of rotation (d).

2. The fitness machine (M) according to the preceding claim, characterized in that, The adjustment device (4, 4') includes an actuation component (46) whose extension axis is located on the rotation axis (d).

3. The fitness machine (M) according to any one of the preceding claims, characterized in that, The adjusting device (4, 4') includes a selection component (42), the extension axis of which is located on an axis parallel to the rotation axis (d). The adjusting device (4, 4') includes an actuation assembly (46), the extension axis of which is located on the rotation axis (d), and The extension axis of the selection component (42) is different from and parallel to the extension axis of the activation component (46).

4. The fitness machine (M) according to any one of the preceding claims, characterized in that, The adjustment device (4, 4') includes a selection element (42) and an actuation element (41, 41') that can be actuated by an actuation assembly (46) whose extension axis is located on the rotation axis (d).

5. The fitness machine (M) according to any one of the preceding claims, characterized in that, The adjustment device (4, 4') includes a selection element (42) and an actuation element (41, 41') connected to each other via an actuation assembly (46) whose extension axis is located on the rotation axis (d).

6. The fitness machine (M) according to any one of the preceding claims, characterized in that, The first lever (2) and the second lever (3) can be connected to the support frame (1) respectively via a first fixing group (23) and a second fixing group (33). Each fixing group includes a covering element (233, 333), and a first through hole (233a) and a second through hole (333a) are respectively formed on the surface of the covering element. The adjustment device (4, 4') can be actuated by the actuating elements (41, 41') inserted into the first through hole (233a) and the second through hole (333a) respectively.

7. The fitness machine (M) according to the preceding claim, characterized in that, The first through hole (233a) and the second through hole (333a) are formed at the center of the surface of each cover element (233, 333).

8. The fitness machine (M) according to any one of the preceding claims, characterized in that, The transmission system (6) includes a first selection disc (60), on the surface of which are formed a plurality of grooves (A1, A2, A3, ..., A4) connected to the first lever (2). n ), The transmission system (6) includes a second selection disc (64), on the surface of which are formed a plurality of grooves (A1, A2, A3, ..., A4) connected to the second lever (3). n ),and The adjusting device (4, 4') includes a selection pin (42) that is capable of engaging with the plurality of slots (A1, A2, A3, ..., A...). n Each slot in the lever (2) engages and disengages to adjust the starting stroke position of the first lever (2) and the second lever (3).

9. The fitness machine (M) according to any one of the preceding claims, characterized in that, The regulating device (4) includes: The knob (41) is gripped by the user and can move along the axis of rotation (d) toward and away from the support frame (1). The rod (434) has its extension axis located on the rotation axis (d) and is connected to the knob (41). The lever (43) can be activated by the rod (46). Select pin (42) is configured to select the starting stroke position of the first lever (2) and the second lever (3) and can be activated by the lever (43). The extension axis of the select pin is different from and parallel to the extension axis of the rod (46).

10. The fitness machine (M) according to the preceding claim, characterized in that, The lever (46) is rotatably connected inside the knob (41) so that it can rotate freely about the axis of rotation (d) together with the first lever (2), while the knob (41) remains stationary in the user's hand.

11. The fitness machine (M) according to claim 9 or 10, characterized in that, The rod (46) is slidably inserted along the axis of rotation into the first shaft (234) that connects the adjusting device (4) to the transmission system (6), such that the rod can translate along the axis of rotation (d).

12. The fitness machine (M) according to any one of claims 9 to 11, characterized in that, The lever (43) includes a first end (43a) connected to the first fixing group (23, 33) and a second end (431b) connected to the selection pin (42).

13. The fitness machine (M) according to claim 12, characterized in that, The selector pin (42) is connected to the second end (43b) of the lever (43) via an elastic safety element (45).

14. The fitness machine (M) according to any one of claims 1 to 8, characterized in that, The adjusting device (4') includes: The ringed knob (41') can be pressed by the user along the axis of rotation (d) toward the support frame (1). The lever (43') can be activated by the ring-shaped knob (41') and can control the movement of the selector pin (42).

15. The fitness machine (M) according to the preceding claim, characterized in that, The lever (43') is fixed to the plate (431') at one end and connected to the selector pin (42) at the other end by a resilient safety element (45).

16. The fitness machine (M) according to any one of the preceding claims, characterized in that, The first lever (2) and the second lever (3) can be connected to the support frame (1) through the first fixing group (23) and the second fixing group (33) respectively. When the first lever (2) and the second lever (3) are arranged along the vertical axis perpendicular to the ground and are fully raised towards the upper end of the support frame (1), the first lever and the second lever can be returned towards the support frame (1) by means of an elastic device.

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