A bodybuilding apparatus impact protection device

Abstract

The utility model relates to body -building equipment technical field especially arm strength device anti -collision protection device, including support, rotatably located on the ratchet wheel group of support, set up in ratchet wheel group one side and are used to the rebound assembly of ratchet wheel group rotation, set up in ratchet wheel group the other side's tachometer, set up in the upper cover of support top, set up in the brake of upper cover, set up in the main control circuit board and battery of support, when ratchet wheel group counterclockwise direction rotation speed (pull out line) of tachometer monitoring exceeds the pre -set value, main control circuit board immediately starts brake and lets machine stop working (rotation), ratchet wheel group stops rotating, when main control circuit board detects tachometer clockwise rotation (take up line), main control circuit board removes electronic brake, and new cycle starts work, and ratchet wheel group can move rotation, avoid arm strength device rebound and cause harm to human body.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to an anti-collision protection device for arm strength trainers. Background Technology

[0002] Arm exercisers, also known as grip strengtheners, are used to train arm muscles, primarily focusing on arm and chest strength, and supplementing wrist strength. There are three main types of anti-collision features on existing arm exercisers. The first is the conventional type, with safety ropes attached to both sides of the exerciser, which are strapped to the user's arm before use. However, beginners often neglect this safety feature, or some users find it uncomfortable and don't wear the safety ropes. The second type has ratchet pawls at both ends of the exerciser. During use, the user presses on designated positions on both sides of the exerciser to prevent the pawls from contacting the ratchet. If the hand accidentally leaves the exerciser, the pawls, no longer under hand control, will contact the ratchet, thus preventing the exerciser from rebounding. (See Chinese patent). Publication No. CN2899861Y discloses a safety arm exerciser, including two handles and a spring. The two handles are interference-fitted with both ends of the spring. A pair of pawls are respectively set on the two handles. A torsion spring is set between each pawl and the handle. A pair of holes are set on the two handles. A pair of shafts are interference-fitted with the pair of holes respectively. A pair of bearings are respectively sleeved on the pair of shafts. The pair of bearings are interference-fitted with a pair of ratchet wheels respectively. The pair of ratchet wheels respectively hold the pair of pawls. A groove is set under each pair of ratchet wheels. One end of the spring is set in the groove. The other end of the spring is fixed by a pin. The pair of ratchet wheels are connected by a connecting rope.

[0003] The third type involves incorporating a safety belt into the arm exerciser. For example, Chinese Patent Publication No. CN203264146U discloses an arm exercise bar with a left handle and a right handle, wherein the left handle is equipped with a safety belt storage box.

[0004] The second type of arm exerciser requires the user to press the designated position with their fingers to prevent the pawl from contacting the ratchet. However, when the human hand holds the arm exerciser, the palm is usually in a grasping position, making it inconvenient to press the designated button or position with the thumb. Furthermore, since the arm exerciser is fitness equipment, users often gradually use heavier weights as their exercise intensity increases, resulting in sweaty palms. When the palm is in a grasping position, it will shift and slide from side to side, making it impossible to maintain a firm grip on one position. Even if it is possible, when exercising the anterior deltoid of the shoulder, the arm exerciser requires a reverse grip, which makes it impossible to effectively contact a fixed position.

[0005] The third type involves directly embedding a safety belt inside the arm exerciser. This type of safety belt is designed for automobiles. Inserting the safety belt into a single arm exerciser not only increases its size and weight, making it difficult to grip the arm exerciser, but also causes an imbalance in the left and right weight distribution of the arm exerciser, affecting the force exerted by both hands. Furthermore, in actual use, the braking distance of the safety belt is only 20-30cm, which is long and can cause the hand to slip off, thus failing to provide safe protection for the human body. Summary of the Invention

[0006] Therefore, in response to the above problems, this utility model proposes an anti-collision protection device for arm exercisers, which solves the technical problem that the rebound of existing arm exercisers can easily cause injury to the human body.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an anti-collision protection device for an arm strength exerciser, comprising a bracket, a ratchet assembly rotatably mounted on the bracket, a spring-loaded component located on one side of the ratchet assembly for rotating the ratchet assembly, a speed sensor located on the other side of the ratchet assembly, an upper cover located on the top of the bracket, a brake located inside the upper cover, a main control circuit board located inside the bracket, and a battery, wherein the speed sensor, battery, and brake are electrically connected to the main control circuit board.

[0008] Furthermore, the ratchet assembly includes a pivot rotatably mounted on a bracket, a ratchet mounted on the pivot, and a pawl for braking the ratchet, the pawl being movably mounted on the bracket.

[0009] Furthermore, the brake is an electromagnet or a linear drive mechanism.

[0010] Furthermore, the spring-loaded component is a spring, a torsion spring, or a rotary spring.

[0011] Furthermore, the speed sensor is a Hall sensor assembly.

[0012] Furthermore, guide holes are provided on both sides of the bracket.

[0013] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0014] This arm exerciser anti-collision protection device, when the main control circuit board detects the speed sensor rotating clockwise (retracting the cable), releases the electronic brake, and a new cycle begins. The ratchet assembly can rotate, preventing the arm exerciser from rebounding and causing injury to the user. Compared to the second type of arm exerciser disclosed in the background art, this structure eliminates the need for the hand to be pressed in a designated position, making it easier to grip. It can be used for both overhand and backhand exercises without affecting the effective protection of the arm exerciser. Compared to the third type of arm exerciser disclosed in the background art, this device has a shorter braking distance, and during use, the support is located in the middle of the arm exerciser under the action of the rebound component. Due to the small size and weight of the protection device, it has little impact on the user. Compared to directly placing the safety belt into the gripping position of the arm exerciser, this protection device does not affect the original structure of the arm exerciser, making it convenient for the user. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2This is a schematic diagram of the structure of this utility model in its exploded state;

[0017] Figure 3 This is the circuit block diagram of this utility model;

[0018] Figure 4 This is a flowchart of the present invention;

[0019] Figure 5 This is a schematic diagram of the U-shaped buckle and the first rotating body in an exploded state according to this utility model;

[0020] Figure 6 This is a partial cross-sectional structural diagram of the first and second rotating bodies of this utility model. Detailed Implementation

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] refer to Figures 1 to 6 This embodiment provides an anti-collision protection device for a power arm exerciser, including a bracket 1, a ratchet assembly 2 rotatably mounted on the bracket 1, a spring-loaded component 3 located on one side of the ratchet assembly 2 for rotating the ratchet assembly 2, a speed sensor 4 located on the other side of the ratchet assembly 2, an upper cover 5 located on the top of the bracket 1, a brake 6 located inside the upper cover 5, a main control circuit board located inside the bracket 1, and a battery. The speed sensor 4, the battery, and the brake are electrically connected to the main control circuit board. The main control circuit board and the battery can be independently located outside the bracket or inside the bracket, and can be located in any position as long as the control function is realized.

[0023] Before use, wrap the two wires around the outside of the ratchet assembly 2, and then pull the ends of the two wires out from both sides of the bracket 1. After turning on the power, the main control circuit board starts monitoring the speed sensor 4. When the speed sensor 4 detects that the counterclockwise rotation speed of the ratchet assembly 2 (pulling out the wires) exceeds the preset value, the main control circuit board immediately activates the brake 6 to stop the machine from working (rotating), and the ratchet assembly 2 stops rotating. When the main control circuit board detects that the speed sensor 4 rotates clockwise (retracting the wires), the main control circuit board releases the electronic brake 6, and a new cycle begins. The ratchet assembly 2 can rotate freely, and the main control circuit board can also rotate counterclockwise at a speed exceeding the preset value. After the brake applies braking force to the ratchet assembly for 1 to 6 seconds, the main control circuit board releases the brake.

[0024] The ratchet assembly 2 includes a rotating shaft 21 rotatably mounted on the bracket 1, a ratchet 22 mounted on the rotating shaft 21, and a pawl 23 for braking the ratchet 22. The pawl 23 is movably mounted on the top of the bracket 1 near the brake 6. During use, when the ratchet is not braked, the brake 6 controls the pawl 23 not to contact the ratchet 22. When braking is required, the brake 6 controls the pawl 23 to move and engage with the ratchet 22, thereby braking the ratchet 22.

[0025] The brake 6 is an electromagnet or a linear drive mechanism. The linear drive mechanism can be an electromagnetic pull rod, an electric push rod, or other drive mechanisms that push the pawl. The main control circuit board controls the ratchet 22 to brake by pulling the ratchet 22 set of built-in pawls 23 up and down through the electromagnetic pull rod. It can also be replaced by an electric push rod or other existing devices that achieve the same function.

[0026] Preferably, an electromagnet is used. When braking is required, the main control circuit board controls the electromagnet, and the pawl 23 will fall rapidly under the action of gravity, which can quickly brake the ratchet 22. Alternatively, a magnet block opposite to the magnetic field of the electromagnet can be built into the pawl 23. During use, even if the bracket flips, the pawl 23 can still stick to the ratchet 22.

[0027] The spring-loaded assembly 3 is a spring, a torsion spring, or a rotary spring. When the spring-loaded assembly 3 is preferably a spring, the center of the spring is connected to the central pivot 21 of the ratchet 22, and the other side is connected to the bracket 1. It can control the rotation of the ratchet 22 to take in the wire. It can also be replaced by a torsion spring, with one side connected to the central pivot 21 of the ratchet 22 and the other side connected to the bracket 1. It can also be replaced by other devices that achieve the same function.

[0028] The speed sensor 4 can be a rotary encoder, a Hall sensor assembly, or a photoelectric sensor, or it can be replaced with other existing devices that achieve the same function. When it is a rotary encoder, one side of the rotary encoder is connected to the bracket, and the other side is connected to the central shaft of the ratchet. When it is a Hall sensor assembly, two Hall sensors are used to determine the forward and reverse rotation of the shaft. The Hall sensors are installed above and below the shaft, and a marker, such as a magnet, is set. When the shaft rotates forward, the marker will pass through the Hall sensors above and below in sequence. Therefore, we can determine the forward rotation direction of the shaft by comparing the output signals of the two sensors. One side of the internal shaft of the ratchet 22 is connected to the Hall sensor assembly. After the central shaft 21 of the ratchet 22 rotates one revolution, the Hall sensor assembly detects the number of revolutions of the central shaft 21 of the ratchet 22 and converts it into an electrical signal to be sent to the main control circuit board. The speed sensor 4 is useful for detecting the number of revolutions and the rotation direction of the shaft 21.

[0029] Preferably, guide holes 101 are provided on both sides of the bracket 1. When the wire connecting the arm strength device is fixed on the central rotating shaft 21 of the ratchet 22 group, one wire passes through the left guide hole 101 and the other wire passes through the right guide hole 101, which is conducive to guiding the wire of the arm strength device. Adjustments can be made according to the actual situation, or the guide holes 101 may not be provided.

[0030] The aforementioned speed sensor, brake, main control circuit board, and battery are all existing electrical devices in the art. Those skilled in the art should possess the conventional model selection and connection techniques for electronic components. Based on the above description and accompanying drawings, those skilled in the art can, through a limited number of circuit connection experiments, fully reproduce the braking and collision avoidance function disclosed in this patent application and achieve the same technical effect.

[0031] Specific principle: First, pull out the wire on the rotating shaft 21 and connect it to both sides of the arm exerciser. Then start the machine. The main control circuit board starts working. When the arm exerciser makes a compression motion, that is, the ratchet group 2 retracts the wire under the action of the spring-loaded component 3. The speed sensor component 4 detects that the wire is being retracted (clockwise). The brake 6 in the bracket 1 does not work.

[0032] When the arm exerciser rebounds back to its straight position, i.e., the cable is pulled out, the speed sensor assembly 4 detects that it is counterclockwise (cable pulled out). At this time, the main control circuit board determines whether it exceeds the preset value. If so, the electromagnet inside bracket 1 will release pawl 3, and pawl 3 will lock ratchet assembly 2 under the action of gravity, preventing ratchet assembly 2 from moving. When the arm exerciser performs a compression motion and the spring assembly 5 performs a winding motion, the speed sensor assembly 4 detects that it is winding (clockwise), and the electromagnet will also release the brake and attract the pawl.

[0033] The ratchet assembly has two wires wound around the outside of the built-in rotating shaft. Each wire has a U-shaped buckle 7 at its end. A first rotating body 8 is rotatably connected between the U-shaped buckles. A second rotating body 9, which can rotate 360 ​​degrees, is provided on one side of the first rotating body. The second rotating body is connected to an external arm exerciser. The U-shaped buckles, which connect the first and second rotating bodies to the external arm exerciser, facilitate connection with existing external arm exercisers.

[0034] The first rotating body is provided with a stopper 10 for limiting the swing of the U-shaped buckle within a 180-degree range. The stopper is symmetrically arranged on the upper and lower sides of the first rotating body.

[0035] The first and second rotating bodies are used to connect the arm exerciser. The first and second rotating bodies are two sections that can rotate 360 ​​degrees relative to each other. The U-shaped buckle has symmetrical stops, which allows the U-shaped buckle to swing within a 180-degree range between the two stops. When connected to the arm exerciser, the hand will not touch the two wires on the U-shaped buckle, avoiding the two wires from being affected by the ratchet group and the spring mechanism. Holding the part near the U-shaped buckle will bring the hand into contact with the two wires.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A collision protection device for an arm strength trainer, characterized in that, The device includes a bracket (1), a ratchet assembly (2) rotatably mounted on the bracket (1), a spring-loaded assembly (3) located on one side of the ratchet assembly (2) for rotating the ratchet assembly (2), a speed sensor (4) located on the other side of the ratchet assembly (2), a brake (6) located in the upper cover (5), a main control circuit board, and a battery. The speed sensor (4), the battery, and the brake (6) are electrically connected to the main control circuit board. The ratchet assembly (2) includes a pivot (21) rotatably mounted on a bracket (1), a ratchet (22) mounted on the pivot (21), and a pawl (23) for braking the ratchet (22), the pawl (23) being movably mounted on the bracket (1).

2. The anti-collision protection device for an arm strength trainer according to claim 1, characterized in that: The brake (6) is an electromagnet.

3. The anti-collision protection device for an arm strength trainer according to claim 1, characterized in that: The brake (6) is a linear drive mechanism.

4. The anti-collision protection device for an arm strength trainer according to claim 1, characterized in that: The spring-loaded assembly (3) is a spring, a torsion spring, or a rotary spring.

5. The anti-collision protection device for an arm strength trainer according to claim 1, characterized in that: The speed sensor (4) is a Hall sensor assembly or a photoelectric sensor.

6. The anti-collision protection device for an arm strength trainer according to claim 1, characterized in that: The bracket (1) has guide holes (101) on both sides in the lateral direction.

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