Chest expander

Abstract

The utility model relates to a chest expander which comprises a shell, a winding unit and a force storage unit are arranged on the shell, the winding unit comprises a pair of rocker arm assemblies arranged on the shell and a pull rope wound between the two rocker arm assemblies, and at least one shaft portion of each rocker arm assembly is in transmission connection with the force storage unit. The pull rope is used for pulling the two rocker arm assemblies so that the two rocker arm assemblies can be unfolded outwards, and the pull rope is used for enabling the two rocker arm assemblies to be folded inwards during pulling. The two rocker arm assemblies are arranged, the pull rope is repeatedly wound between the two rocker arm assemblies, and the force storage unit provides folding resistance for the two rocker arm assemblies, so that the two rocker arm assemblies can overcome the resistance to be folded by pulling the pull rope during use, and arm exercise is performed; the pull rope which is wound repeatedly releases a large stroke in the folding process and is suitable for arm tension training, and after the pull rope is folded, the pull rope can be automatically reset and wound along with unfolding of the rocker arm assembly, and manual storage is not needed.

Description

Technical Field

[0001] This utility model belongs to the field of fitness equipment, specifically relating to a resistance band. Background Technology

[0002] Resistance bands are a type of fitness equipment suitable for the general public. They are mainly used to exercise the arms by providing tensile resistance. In existing resistance bands, resistance is generally provided through structures such as springs, elastic bands, or counterweights. Firstly, resistance bands with counterweight structures are generally large machines and are not suitable for small home use. Secondly, resistance bands with springs and elastic bands have a long pulling stroke, and the rope or strap usually needs to be stored after use, which is inconvenient. Utility Model Content

[0003] The purpose of this invention is to provide a tensioner with a long pulling stroke and automatic retraction capability in order to solve the above-mentioned problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] A tensioner includes a housing, on which a winding unit and a power storage unit are disposed. The winding unit includes a pair of rocker arm assemblies disposed on the housing and a pull rope wound between the two rocker arm assemblies. At least one shaft of the rocker arm assembly is throttle-connected to the power storage unit so that the two rocker arm assemblies are in an outwardly extended state. The pull rope is used to retract the two rocker arm assemblies inward when pulled.

[0006] As a further optimization of this utility model, the rocker arm assembly includes a pair of rocker arms, the shaft of the rocker arm is rotatably connected to the housing, and the end of the rocker arm away from the shaft is hinged to the same connecting part. The connecting part is provided with several guide wheels. The pull rope is repeatedly wound between the guide wheels of the two rocker arm assemblies, and one end is finally fixed to the connecting part, while the other end is used for traction exercise. In this solution, by setting the rocker arm assembly and the pull rope that is wound back and forth between the rocker arm assemblies, when the pull rope is pulled, it will drive the two rocker arm assemblies to retract inward, and the multiple wound pull ropes can provide a longer stroke requirement.

[0007] As a further optimization of this utility model, the rotation axis of the guide wheel is parallel to the shaft of the rocker arm, and the outer surface of the guide wheel is provided with an annular groove that matches the pull rope. The guide wheel can reduce the friction when the pull rope slides, and the annular groove is further provided to prevent the pull rope from detaching.

[0008] As a further optimization of this utility model, the power storage unit includes an elastic element disposed within the housing. One end of the elastic element is provided with a first sliding element for compressing the elastic element. The shaft portion of the rocker arm extends radially and is provided with a pressure arm. The pressure arm is used to drive the first sliding element to compress the elastic element. This solution provides an elastic element within the housing and uses the elastic element to lift the pressure arm, so that the two rocker arm assemblies are in an outwardly extended state. When retracting, the elastic element provides resistance.

[0009] As a further optimization of this utility model, the power storage unit also includes an adjustment knob disposed at the bottom of the housing. The adjustment knob is provided with a rotating shaft, and a second sliding member is disposed at the end of the elastic member away from the first sliding member. The rotating shaft passes through the housing and the second sliding member, and a threaded structure for driving the second sliding member to pre-compress the elastic member is provided between the rotating shaft and the second sliding member. This solution further adjusts the pre-compression force of the elastic member by setting an adjustment knob, so as to adjust the resistance of the entire power storage unit.

[0010] As a further optimization of this utility model, the two rocker arms of each rocker arm assembly are parallel to each other and of equal length.

[0011] As a further optimization of this utility model, the housing is also provided with an outlet sleeve for guiding the pull rope, and one end of the pull rope is also provided with a handle. The handle is used for easy hand holding, and the outlet sleeve is used to change the direction of the pull rope for easy force application.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention features two rocker arm assemblies with a pull rope repeatedly wound between them. A power storage unit provides resistance to the two rocker arm assemblies during retraction. In use, the two rocker arm assemblies can be retracted by pulling the pull rope to overcome the resistance and perform arm exercises. The repeatedly wound pull rope releases a large stroke during the retraction process, making it suitable for arm strength training. After retraction, the pull rope can automatically reset and rewind as the rocker arm assemblies unfold, eliminating the need for manual storage. Attached Figure Description

[0014] Figure 1 This is the front view of this utility model.

[0015] Figure 2 This is a rear view of the present invention.

[0016] Figure 3 This is the utility model Figure 2 Schematic diagram of the medium-capacity storage unit.

[0017] Figure 4 This is a rear-view axonometric view of the present invention.

[0018] Figure 5 This is the utility model Figure 4 Schematic diagram of the medium-capacity storage unit.

[0019] In the diagram: 1. Housing; 101. Outlet sleeve; 2. Winding unit; 21. First rocker arm; 22. Second rocker arm; 23. Connecting part; 24. Guide wheel; 25. Pull rope; 26. Handle; 27. First shaft; 28. Second shaft; 29. ​​Pressure arm; 3. Power storage unit; 31. Elastic element; 32. First sliding element; 33. Second sliding element; 34. Rotating shaft; 35. Adjustment knob. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example 1

[0022] like Figure 1-5 As shown, a tensioner includes a housing 1, on which a winding unit 2 and a power storage unit 3 are disposed. The winding unit 2 includes a pair of rocker arm assemblies disposed on the housing 1 and a pull rope 25 wound between the two rocker arm assemblies. At least one shaft of the rocker arm assembly is throttle-connected to the power storage unit 3 so that the two rocker arm assemblies are in an outwardly extended state. The pull rope 25 is used to retract the two rocker arm assemblies inward when pulled.

[0023] This solution uses two rocker arm assemblies with a pull rope 25 repeatedly wound between them. The power storage unit 3 provides resistance to the two rocker arm assemblies. When in use, the two rocker arm assemblies can be pulled to overcome the resistance and retract, thus exercising the arms. The repeatedly wound pull rope 25 releases a large stroke during the retraction process, which is suitable for arm strength training. After retraction, as the rocker arm assemblies unfold, the pull rope 25 can automatically reset and retract, without the need for manual storage.

[0024] Specifically, the rocker arm assembly includes a pair of rocker arms, namely a first rocker arm 21 and a second rocker arm 22. The two rocker arms of each rocker arm assembly are parallel to each other and of equal length. The shaft of the rocker arm is rotatably connected to the housing 1. The shaft of the first rocker arm 21 is the first shaft 27, which passes through the housing 1 from the upper end. The corresponding shaft of the second rocker arm 22 is the second shaft 28, which is rotatably connected to the housing 1 from the middle. The end of the rocker arm away from the shaft is hinged to the same connecting part 23. The connecting part 23 is provided with several guide wheels 24. The pull rope 25 is repeatedly wound between the guide wheels 24 of the two rocker arm assemblies, and one end is finally fixed to the connecting part 23. The other end is used for traction exercise. In this solution, by setting the rocker arm assembly and the pull rope 25 that is wound back and forth between the rocker arm assemblies, when the pull rope 25 is pulled, it will drive the two rocker arm assemblies to retract inward. The multiple winding pull ropes 25 can provide a longer stroke for retraction and extension.

[0025] The rotation axis of the guide wheel 24 is parallel to the shaft of the rocker arm, and the outer surface of the guide wheel 24 is provided with an annular groove that matches the pull rope 25. The guide wheel 24 can reduce the friction when the pull rope 25 slides, and the annular groove is further provided to prevent the pull rope 25 from detaching.

[0026] The power storage unit 3 includes an elastic element 31 disposed inside the housing 1. The elastic element 31 is a spring and is disposed parallel to both sides inside the housing 1. One end of the elastic element 31 is provided with a first sliding element 32 for compressing the elastic element 31. The shaft of the rocker arm extends radially and is provided with a pressure arm 29. The pressure arm 29 is used to drive the first sliding element 32 to compress the elastic element 31. The two rocker arm assemblies have two pressure arms 29, which are symmetrically pressed against the two ends of the first sliding element 32 respectively. This solution provides resistance by setting the elastic element 31 inside the housing 1 and lifting the pressure arm 29 by the elastic element 31, so that the two rocker arm assemblies are in an outwardly extended state. When retracting, the elastic element 31 provides resistance.

[0027] The power storage unit 3 also includes an adjustment knob 35 located at the bottom of the housing 1. The adjustment knob 35 is equipped with a rotating shaft 34. A second sliding member 33 is also provided at the end of the elastic member 31 away from the first sliding member 32. The rotating shaft 34 passes through the housing 1 and the second sliding member 33. A threaded structure is provided between the rotating shaft 34 and the second sliding member 33 for driving the second sliding member 33 to pre-compress the elastic member 31. This solution further adjusts the pre-compression force of the elastic member 31 by setting the adjustment knob 35, so as to adjust the resistance of the entire power storage unit 3. Specifically, the rotating shaft 34 extends into the housing 1 and is rotatably connected to the connecting rib inside the housing 1. By rotating the adjustment knob 35, the second sliding member 32 compresses the elastic member 31 upward under the guidance of the inner wall of the housing 1, so that the elastic member 13 has a certain compressive force acting on the first sliding member 32, thereby increasing the sliding resistance of the first sliding member 32 and thus increasing the traction resistance of the pull rope 25.

[0028] The housing 1 is also provided with an outlet sleeve 101 for guiding the pull rope 25. One end of the pull rope 25 is also provided with a handle 26. The handle 26 is used to make it easy to hold the 101, and the outlet sleeve is used to change the direction of the pull rope 25 for easy application of force.

[0029] The specific implementation method is as follows: fix one end of the housing 1, then rotate the adjustment knob 35 to move the second sliding member 33 to a suitable resistance position, and then pull the pull rope 25. The pull rope 25 is repeatedly wound between the guide wheel 24. When contracting, the two rocker arm units are brought together in the middle, and the first rocker arm 21 of the two rocker arm units squeezes the first sliding member 32 through the pressure arm 29. After releasing the pull rope 25, the elastic member 31 pushes the pressure arm 29 upward, and the rocker arm unit reopens to facilitate the traction training of the next cycle.

[0030] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A tensioner, comprising a housing (1), characterized in that: The housing (1) is provided with a winding unit (2) and a power storage unit (3). The winding unit (2) includes a pair of rocker arm assemblies provided on the housing (1) and a pull rope (25) wound between the two rocker arm assemblies. At least one shaft of the rocker arm assembly is connected to the power storage unit (3) so that the two rocker arm assemblies are in an outwardly extended state. The pull rope (25) is used to retract the two rocker arm assemblies inward when pulled.

2. A tensioner according to claim 1, characterized in that: The rocker arm assembly includes a pair of rocker arms, the shaft of the rocker arm is rotatably connected to the housing (1), and the end of the rocker arm away from the shaft is hinged to the same connecting part (23). The connecting part (23) is provided with a plurality of guide wheels (24). The pull rope (25) is repeatedly wound between the guide wheels (24) of the two rocker arm assemblies, and one end is finally fixed on the connecting part (23), while the other end is used for traction exercise.

3. A tensioner according to claim 2, characterized in that: The rotation axis of the guide wheel (24) is parallel to the shaft of the rocker arm, and the outer surface of the guide wheel (24) is provided with an annular groove that matches the pull rope (25).

4. A tensioner according to claim 2, characterized in that: The power storage unit (3) includes an elastic element (31) disposed in the housing (1). One end of the elastic element (31) is provided with a first sliding element (32) for compressing the elastic element (31). The shaft of the rocker arm extends radially and is provided with a pressure arm (29). The pressure arm (29) is used to drive the first sliding element (32) to compress the elastic element (31).

5. A tensioner according to claim 4, characterized in that: The power storage unit (3) also includes an adjustment knob (35) located at the bottom of the housing (1). The adjustment knob (35) is provided with a rotating shaft (34). A second sliding member (33) is provided at the end of the elastic member (31) away from the first sliding member (32). The rotating shaft (34) passes through the housing (1) and the second sliding member (33). A threaded structure is provided between the rotating shaft (34) and the second sliding member (33) for driving the second sliding member (33) to pre-compress the elastic member (31).

6. A tensioner according to claim 2, characterized in that: The two rocker arms of each rocker arm assembly are parallel to each other and of equal length.

7. A tensioner according to claim 1, characterized in that: The housing (1) is also provided with an outlet sleeve (101) for guiding the pull rope (25), and one end of the pull rope (25) is also provided with a handle (26).

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