Crank arm training machine

Abstract

The utility model discloses a crank arm training machine which comprises a main frame, a cushion, a backrest, an upper limb supporting part and a pedal are arranged on the main frame, and the upper limb supporting part and the pedal are both rotationally connected with the main frame; the upper limb supporting part is connected with a counterweight mechanism for providing rotation resistance for the upper limb supporting part; the upper limb supporting part is located above the backrest, a user sits on the cushion, the two arms of the user are supported on the upper limb supporting part, and the upper limbs of the user stretch upwards and backwards and are in the arm bending state; the pedal is located in front of the cushion, a linkage mechanism is arranged between the pedal and the upper limb supporting part, the pedal rotates under stress, the upper limb supporting part and the pedal are driven to rotate in the same direction through the linkage mechanism, and the upper limb supporting part is made to be close to or away from the backrest. By means of the linkage mechanism, a user can control the position and the angle of the upper limb supporting part through simple operation of the pedal, gradual increase of the stretching range of the two arms and flexible adjustment of the training intensity are achieved, and therefore the best training effect is obtained on the premise that safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness equipment, in particular to an arm curl training machine. Background Art

[0002] In the fitness world, training for back and arm strength has always been a key focus for exercisers. Curl-arm machines, specifically designed to strengthen the muscles in these areas, have gained widespread recognition for their effectiveness and practicality. Traditional curl-arm machines typically require users to directly use their arms against weights or resistance to achieve a training effect. However, in actual use, this type of equipment presents some potential issues and challenges.

[0003] First, there are significant differences in flexibility and strength levels between individuals. For beginners or users with poor flexibility, directly performing a large range of arm extension backwards can be very difficult and even risk injury, especially when attempting to extend beyond one's ability, which can easily lead to muscle strain or other injuries.

[0004] Secondly, traditional training machines have limitations in adapting to the needs of different users. Due to the lack of flexible adjustment mechanisms, users of different heights, body shapes, or strength levels may find it difficult to find the training position and angle that best suits them, thus affecting training effectiveness and comfort. Utility Model Content

[0005] The purpose of the utility model is to provide an arm curl training machine, which can automatically adjust the training difficulty and angle according to the actual situation of the user, so as to ensure that the training process is both safe and effective.

[0006] To achieve the above-mentioned object, the solution of the present invention is as follows: an arm curl training machine, comprising a main frame, a seat cushion, a backrest, an upper limb support portion and a footrest provided on the main frame, the upper limb support portion and the footrest being rotatably connected to the main frame;

[0007] The upper limb support part is connected to a counterweight mechanism that provides rotation resistance for it; the upper limb support part is located above the backrest, and the user sits on the seat cushion with both arms supported on the upper limb support part, with the upper limbs stretched upward and backward and the arms bent;

[0008] The footrest is located in front of the seat cushion, and a linkage mechanism is provided between the footrest and the upper limb support part. When the footrest is rotated under force, the upper limb support part is driven to rotate in the same direction as the footrest through the linkage mechanism, so that the upper limb support part moves closer to or away from the backrest.

[0009] Furthermore, the upper limb supporting portion includes a U-shaped armrest, both ends of the U-shaped armrest are bent in a U shape, and the bent portions at both ends of the U-shaped armrest are provided with pads for supporting the upper arm.

[0010] Furthermore, the pedal is located at the inner end and outer end of its rotating shaft, and the upper limb support part is located at the inner end and outer end of its rotating shaft, respectively. The lower end of the connecting rod is rotatably connected to the inner end of the pedal, and the upper end of the connecting rod is rotatably connected to the inner end of the upper limb support part.

[0011] Furthermore, an L-shaped connecting piece is fixed to the inner end of the pedal, and the L-shaped connecting piece is hinged to the lower end of the connecting rod.

[0012] Furthermore, a telescopic cylinder is provided between the inner end of the pedal and the bracket.

[0013] Furthermore, the upper end of the connecting rod is hinged to the rotation axis of the upper limb support part through a connecting piece;

[0014] A connecting disk coaxial with its rotating axis is fixed on the upper limb support part, and a driving column is axially fixed on the connecting disk. The connecting rod swings, driving the connecting plate to swing and push the driving column, thereby driving the connecting disk to rotate, and the upper limb support part rotates following the rotation of the connecting disk.

[0015] Furthermore, an indicator is connected to the driving column, and the indicator is used to indicate the position status of the upper limb support part.

[0016] Furthermore, a buffer pad is provided on the main frame below the pedal, and the pedal falls on the buffer pad when it is reset.

[0017] Furthermore, a strap assembly is provided on the main frame at the waist of the human body.

[0018] Furthermore, a lifting mechanism is provided between the seat cushion and the main frame, and the seat cushion moves up and down relative to the main frame through the lifting mechanism to adjust the height of the seat cushion from the ground.

[0019] After adopting the above solution, the beneficial effects of the utility model are:

[0020] The utility model provides a training machine capable of providing back muscle training for a user. The machine mainly comprises a main frame, a counterweight mechanism, and a seat cushion, a backrest, an upper limb support portion, and footrests arranged on the main frame. The upper limb support portion is located above the backrest. During training, the user sits on the seat cushion with their back against the backrest, stretches their upper limbs upward and backward, and bends their arms. Subsequently, the user contracts their back and arms toward the abdomen to counteract the resistance of the counterweight mechanism, thereby exercising the back muscles and arm strength.

[0021] A footrest is located in front of the seat, and a linkage mechanism is installed between the footrest and the upper limb support. When the user steps on the footrest and applies downward force, the outer end of the footrest is forced to swing downward, driving the inner end of the upper limb support to swing closer to the footrest through the linkage mechanism, reducing the angle of the upper limb support. This allows the user to easily enter the machine, effectively avoiding the discomfort or potential injury caused by an excessive initial extension angle, and improving safety and comfort. Conversely, the outer end of the footrest swings upward, driving the inner end of the upper limb support to swing back away from the footrest. Through this linkage mechanism, the user can control the position and angle of the upper limb support with simple footrest operation, gradually increasing the range of arm extension and flexibly adjusting training intensity, thereby achieving the best training results while ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of an arm curl training machine according to an embodiment of the present invention (initial position);

[0023] Figure 2 This is a three-dimensional diagram of the upper limb support, linkage mechanism and footrest (initial position) of an embodiment of the present invention;

[0024] Figure 3 This is a side view of the upper limb support, linkage mechanism, and footrest (initial position) of an embodiment of the present invention;

[0025] Figure 4 This is a side view (middle position) of the upper limb support portion of an embodiment of the present invention;

[0026] Figure 5 This is a side view of the upper limb support portion (final position) of an embodiment of the present invention.

[0027] Description of labels:

[0028] 1. Main frame; 2. Seat cushion; 3. Backrest; 4. Upper limb support; 41. U-shaped armrest; 42. Pad; 5. Footrest;

[0029] 6. Linkage mechanism; 61. Connecting rod; 62. L-shaped connector; 63. Connecting piece; 64. Connecting plate; 65. Driving column;

[0030] 66. Indicator;

[0031] 7. Telescopic cylinder; 71. Cylinder body; 72. Piston rod; 8. Counterweight mechanism; 9. Pulley rope assembly; 10. Lifting mechanism; 11. Strap assembly; 12. Buffer pad. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The utility model provides a bent arm training machine, such as Figures 1 to 5 As shown, it includes a main frame 1, on which a seat cushion 2, a backrest 3, an upper limb support portion 4 and a footrest 5 are provided, and the upper limb support portion 4 and the footrest 5 are both rotatably connected to the main frame 1;

[0034] like Figure 1 As shown, the upper limb support part 4 is connected to a counterweight mechanism 8, which is connected to the upper limb support part 4 through a pulley rope assembly 9, providing adjustable rotational resistance for the upper limb support part 4, which can meet the needs of different arm curl training machine users.

[0035] like Figure 2 As shown, the upper limb support part 4 is located above the backrest 3, and the upper limb support part 4 includes a U-shaped armrest 41. The two ends of the U-shaped armrest 41 are bent in a U shape, and the bent parts at both ends of the U-shaped armrest 41 are provided with pads 42 for supporting the upper arms. When in use, the user sits on the seat cushion 2, stretches his arms upward and backward, grasps the armrests with both hands, and supports his upper arms on the pads 42, showing a state of stretching his upper limbs upward and backward and bending his arms. At this time, the user can contract toward the abdomen through the coordinated action of the back and arms to resist the resistance from the counterweight mechanism 8, thereby exercising the back muscles and the strength of the arms. The maximum range that the upper limb support part 4 of the arm bending training machine can swing is determined by Figures 3 to 5 As shown, they are the initial state, intermediate state and final state in sequence.

[0036] like Figure 2 As shown, the footrest 5 is located in front of the seat cushion 2, and a linkage mechanism 6 is provided between the footrest 5 and the upper limb support part 4. Figure 3 The footrest 5 and the upper limb support portion are in the initial position. When the footrest 5 is forced to rotate clockwise, the upper limb support portion 4 is driven to rotate clockwise through the linkage mechanism 6 to move closer to the backrest 3, thereby reducing the angle between the backrest 3 and the upper limb support portion 4 (refer to Figure 4 This allows the user to easily enter the machine, effectively avoiding discomfort or potential injury caused by an excessively large initial extension angle, thereby enhancing safety and comfort. When the footrest 5 is rotated counterclockwise to reset, the connecting rod 61 mechanism drives the upper limb support 4 to rotate counterclockwise to reset, increasing the angle between the upper limb support 4 and the backrest 3. Therefore, the footrest 5 and the linkage mechanism 6 allow for easy and rapid adjustment of the position and angle of the upper limb support 4, enabling a gradual increase in the range of arm extension and flexible adjustment of training intensity.

[0037] In this embodiment, the linkage relationship between the footrest 5 and the upper limb support part 4 is as follows: Figures 3 to 5As shown, the pedal 5 is positioned at the inner and outer ends of its rotation axis, respectively, and the upper limb support portion 4 is positioned at the inner and outer ends of its rotation axis, respectively. The lower end of the connecting rod 61 is rotationally connected to the inner end of the pedal 5, and the upper end of the connecting rod 61 is rotationally connected to the inner end of the upper limb support portion 4. Specifically, an L-shaped connector 62 is fixed to the inner end of the pedal 5, and the L-shaped connector 62 is hinged to the lower end of the connecting rod 61. When the pedal 5 swings, the connecting rod 61 is driven via the L-shaped connector 62.

[0038] In order to improve the controllability and self-reset capability of the pedal 5, Figure 2 As shown, a telescopic cylinder 7 is installed between the inner end of the footrest 5 and the bracket. Figure 4 As shown, when the pedal 5 is swung by a clockwise external force, its inner end moves upward, causing the piston rod 72 to move into the cylinder 71 to store energy. Figure 3 As shown, once the pedal 5 loses the external force, the spring or air pressure in the telescopic cylinder 7 will cause the piston rod 72 to quickly reset, pushing the inner end of the pedal 5 downward, thereby realizing the automatic reset function of the pedal 5.

[0039] In addition, in order to reduce the impact and noise when the pedal 5 is reset, the main frame 1 is provided with a buffer pad 12 below the pedal 5. Figure 2 When the pedal 5 contacts the cushion 12 during the reset process, it can effectively absorb the impact energy, slow down the falling speed, protect the equipment from damage, and also provide users with a quieter and more comfortable experience.

[0040] The upper end of the connecting rod 61 is hinged to the rotation axis of the upper limb support part 4 through a connecting piece 63, that is, the connecting piece 63 is rotationally connected to the rotation axis of the connecting rod 61 and the upper limb support part 4. A connecting disk 64 coaxial with its rotation axis is fixed to the upper limb support part 4, and the connecting disk 64 and the upper limb support part 4 move synchronously. A driving column 65 is axially fixed to the connecting disk 64. When the connecting rod 61 swings, the connecting piece 63 will swing accordingly and push the driving column 65, and then drive the connecting disk 64 and the entire upper limb support part 4 to rotate through the driving column 65 to achieve angle adjustment. When the user enters the machine, he can release the foot pedal 5 and start training. Here, when the user enters the machine and releases the foot pedal 5, the swinging of the upper limb support part 4 is controlled by the user's upper limbs. Figure 5 The user swings the upper limb supporting part 4 until the driving column 65 is separated from the connecting piece 63 .

[0041] As a further improvement of the structure, Figures 2 to 5 As shown, the driving column 65 is connected to an indicator 66, which is used to indicate the position of the upper limb support 4. The user can intuitively understand the rotation angle and position of the upper limb support 4 by observing the position of the indicator 66, and thus make corresponding adjustments according to their training needs.

[0042] like Figure 1 and Figure 3 As shown, a lifting mechanism 10 is provided between the seat cushion 2 and the main frame 1. The seat cushion 2 moves up and down relative to the main frame 1 through the lifting mechanism 10 to adjust the height of the seat cushion 2 from the ground, thereby meeting the needs of users of different body shapes and allowing each user to find the training posture that best suits him or her.

[0043] In order to further enhance the safety and protection performance of the device, this embodiment also adds a strap assembly 11 at a key position of the human waist on the main frame 1, such as Figure 4 As shown. The strap assembly 11 is made of a soft yet tough material that fits snugly around the user's waist, providing the necessary support and fixation. During training, the strap assembly 11 effectively prevents the user from losing balance due to excessive movements, thereby protecting the user's waist and spine from accidental injury.

[0044] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. Any equivalent changes made based on the key design of this case shall fall within the scope of protection of this case.

Claims

1. An arm bending training machine, characterized in that: The utility model comprises a main frame, wherein a seat cushion, a backrest, an upper limb support portion and a footrest are provided on the main frame, and the upper limb support portion and the footrest are both rotatably connected to the main frame; The upper limb support part is connected to a counterweight mechanism that provides rotation resistance for it; the upper limb support part is located above the backrest, and the user sits on the seat cushion with both arms supported on the upper limb support part, with the upper limbs stretched upward and backward and the arms bent; The footrest is located in front of the seat cushion, and a linkage mechanism is provided between the footrest and the upper limb support part. When the footrest is rotated under force, the upper limb support part is driven to rotate in the same direction as the footrest through the linkage mechanism, so that the upper limb support part moves closer to or away from the backrest.

2. The arm curl training machine according to claim 1, characterized in that: The upper limb supporting part comprises a U-shaped armrest, both ends of the U-shaped armrest are bent in a U shape, and the bent parts at both ends of the U-shaped armrest are provided with pads for supporting the upper arm.

3. The arm curl training machine according to claim 1, characterized in that: The pedal is located at the inner end and the outer end of its rotating shaft at both ends respectively, the upper limb support part is located at the inner end and the outer end of its rotating shaft at both ends respectively, the lower end of the connecting rod is rotatably connected to the inner end of the pedal, and the upper end of the connecting rod is rotatably connected to the inner end of the upper limb support part.

4. The arm curl training machine according to claim 3, characterized in that: An L-shaped connecting piece is fixed to the inner end of the pedal, and the L-shaped connecting piece is hinged to the lower end of the connecting rod.

5. The arm curl training machine according to claim 3, characterized in that: A telescopic cylinder is provided between the inner end of the footrest and the bracket.

6. The arm curl training machine according to claim 3, characterized in that: The upper end of the connecting rod is hinged to the rotation axis of the upper limb support part through a connecting piece; A connecting disk coaxial with its rotating axis is fixed on the upper limb support part, and a driving column is axially fixed on the connecting disk. The connecting rod swings, driving the connecting plate to swing and push the driving column, thereby driving the connecting disk to rotate, and the upper limb support part rotates following the rotation of the connecting disk.

7. The arm curl training machine according to claim 6, characterized in that: The driving column is connected to an indicator, which is used to indicate the position status of the upper limb support part.

8. The arm curl training machine according to claim 1, characterized in that: A buffer pad is provided on the main frame below the pedal, and the pedal falls on the buffer pad when it is reset.

9. The arm curl training machine according to claim 1, characterized in that: The main frame is provided with a strap assembly at the waist of the human body.

10. The arm curl training machine according to claim 1, characterized in that: A lifting mechanism is provided between the seat cushion and the main frame, and the seat cushion moves up and down relative to the main frame through the lifting mechanism to adjust the height of the seat cushion from the ground.

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