Protection device applied to arm strength device

Abstract

The utility model relates to the technical field of protection devices, in particular to a protection device applied to an arm strength device, which comprises a bracket, a ratchet wheel group rotatably arranged in the bracket, a springback piece arranged on one side of the ratchet wheel group, a displacement disc arranged on the other side of the ratchet wheel group, a brake arranged on the bracket and used for controlling the displacement disc to move, a rotating speed sensor and a ratchet groove, when the arm strength device rebounds and straightens, the rotating speed sensor detects anticlockwise movement, and if the speed of the ratchet wheel set exceeds a preset value, under the control of the built-in processor, the brake sucks the displacement disc, the displacement disc drives the ratchet wheel set to be clamped into a ratchet groove of the support, the displacement disc makes contact with the contact sensor after displacement, and after the contact is conducted for 1-5 seconds, the contact sensor stops moving. The arm strength device is prevented from accidentally slipping out of the hand in the using process and hurting a user, and the technical problem that when the hand is accidentally separated from the arm strength device in the using process, the arm strength device rebounds to easily cause injury to the human body is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of protective devices, in particular to a protective device used for an arm strengthener. Background Art

[0002] At present, China Patent Publication No.: CN204469100U discloses an arm strengthener, including a spring, a steel pipe and a handle. A steel pipe is provided at each end of the spring, and a handle is provided at the end of the steel pipe. A safety belt is provided on the handle. A controller is provided on the steel pipe on one side of the spring, and the controller is connected to the handle. A groove is provided on the controller, and an electronic display screen and a USB interface are provided in the groove. Five anti-slip plates are provided on the handle, etc., which discloses an arm strengthener of the general structure of the existing equipment. However, when the hand accidentally leaves the arm strengthener during use, the rebound of the arm strengthener can easily cause human injury. Utility Model Content

[0003] Therefore, in response to the above problems, the present invention proposes a protective device for an arm strengthener, which solves the technical problem that when the hand accidentally leaves the arm strengthener during use, the arm strengthener may rebound and easily cause human injury.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a protective device for an arm strengthener, comprising a bracket, a ratchet group rotatably arranged in the bracket, a rebound member arranged on one side of the ratchet group, a displacement disk arranged on the other side of the ratchet group, a brake arranged on the bracket and controlling the movement of the displacement disk, a speed sensor arranged on the bracket and connected to the ratchet group, and a ratchet groove arranged on the bracket near the ratchet group.

[0005] Furthermore, a contact sensor for detecting the movement of the displacement plate is provided on the other side of the bracket.

[0006] Furthermore, the ratchet assembly includes a rotating shaft rotatably arranged in the bracket, and a ratchet disc arranged on the rotating shaft.

[0007] Furthermore, the resilient member is a clockwork disc or a torsion spring.

[0008] Furthermore, the brake is an electromagnet or a linear drive mechanism.

[0009] By adopting the above technical solution, the beneficial effects of the utility model are:

[0010] This invention is applied to the arm strength trainer protection device. Through the setting of the protection device, the wire is first wrapped around the outside of the ratchet group, and the two wires are respectively wrapped around the two horizontal sides of the arm strength trainer. When the arm strength trainer moves, the rebound part drives the ratchet group to move clockwise or counterclockwise. When the arm strength trainer performs compression movement, the speed sensor measures clockwise movement, and the built-in processor does not impose any restrictions; when the arm strength trainer performs rebound movement, the speed sensor measures counterclockwise movement. If the speed of the ratchet group exceeds the preset value, under the control of the built-in processor, the brake absorbs the displacement disk, and the displacement disk drives the ratchet group to be stuck in the ratchet groove of the bracket. At the same time, the brake absorbs the pawl, so that the pawl is stuck on the ratchet part to achieve braking of the ratchet group. After the displacement, the displacement disk will contact the contact sensor. After 1 to 5 seconds of contact, the brake will release the brake to prevent the arm strength trainer from accidentally slipping out of the hand during use, causing the arm strength trainer to cause harm to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 This is a schematic diagram of the explosion state structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the exploded structure of the bracket of the utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the utility model in a partial explosion state;

[0015] Figure 5 The brake of the present utility model is a schematic diagram of a linear drive mechanism in use. DETAILED DESCRIPTION

[0016] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0017] refer to Figures 1 to 5The present embodiment provides a protective device for an arm strengthener, comprising a bracket 1, a ratchet group 2 rotatably arranged in the bracket 1, a rebound member 3 arranged on one side of the ratchet group 2, a displacement disk 4 arranged on the other side of the ratchet group 2, a pawl 10 arranged on the displacement disk 4, a ratchet member 9 arranged on the ratchet group 2 on one side of the displacement disk 4, a brake 5 arranged on the bracket 1 and controlling the movement of the displacement disk 4, a speed sensor 6 arranged on the bracket 1 and connected to the ratchet group 2, and a ratchet groove 7 arranged on the bracket 1 near the ratchet group 2; the brake 5 can be an electromagnet, or a linear drive mechanism, the linear drive mechanism can be an electromagnetic pull rod, an electric push rod or other drive mechanism to push the pawl, which are all existing technologies and will not be discussed here. No further details are given; the speed sensor is a rotary encoder, a Hall sensor assembly or a photoelectric sensor, or it can be replaced by 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 middle 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 upper and lower Hall sensors in turn, so we can determine the forward rotation direction of the shaft by comparing the output signals of the two sensors; they are all existing technologies and will not be described in detail here; when the brake is a linear drive mechanism, you can refer to Figure 5 One side of the linear drive mechanism is provided on the bracket 1, and the other side is hinged on the pawl 10. When the linear drive mechanism needs the pawl 10 to brake, the built-in push rod of the linear drive mechanism moves downward, and at the same time drives the pawl 10 to rotate to one side and clamp it into the ratchet part. At the same time, the displacement disk loses its support and moves, and the ratchet group is clamped into the ratchet groove. When braking is not required, the linear drive mechanism drives the pawl, and the pawl rotates away from the ratchet part, and at the same time lifts the displacement disk so that the ratchet group does not contact the ratchet groove.

[0018] By setting up the protection device, the wire is first wound around the outside of the ratchet group 2, and the two wires are respectively wound around the lateral sides of the arm strength device. When the arm strength device moves, the rebound member drives the ratchet group 2 to move clockwise or counterclockwise. When the arm strength device performs compression movement, the speed sensor 6 measures the clockwise movement, and the built-in processor does not impose any restrictions; when the arm strength device performs rebound and straight movement, the speed sensor 6 measures the counterclockwise movement. If the speed of the ratchet group 2 exceeds the preset value, under the control of the built-in processor, the brake 5 attracts the displacement disk 4 and the pawl 10, and the displacement disk 4 is brought The movable ratchet group 2 is inserted into the ratchet groove 7 of the bracket 1. At the same time, after power is turned on, one side of the pawl 10 is attracted by the brake 5. After the pawl 10 rotates, the side away from the brake 5 will be inserted into the ratchet part 9. After the displacement disk 4 is displaced, it will contact the contact sensor 8. At this time, the built-in rotating shaft 2a of the ratchet group 2 does not rotate, and the rotating shaft 2a pulls the arm strength tool to hover through the wire. After 1 to 5 seconds of contact, the brake 5 is released, the pawl 10 is separated from the brake 5, and the displacement disk 4 returns to its original position. The ratchet group 2 does not contact the ratchet groove 7, which prevents the arm strength tool from accidentally slipping out of the hand during use, causing the arm strength tool to cause harm to the user.

[0019] A contact sensor 8 for detecting the movement of the displacement disk 4 is provided on the other side of the bracket 1. After the displacement disk 4 moves, it will contact the contact sensor 8. The contact sensor 8 sends a detection signal to the built-in processor. After 1 to 5 seconds of contact, the brake 5 releases the brake. It can be set according to actual usage, or the contact sensor 8 can be not set. The brake 5 can also be automatically released after adsorbing the displacement disk 4; the contact sensor 8 can be a magnetic inductor proximity sensor or an oscillator proximity sensor, both of which are products available on the market. The structure is well known, and the corresponding model can be purchased according to production needs, which will not be described here.

[0020] The ratchet member 9 and the pawl 10 are arranged such that when the speed sensor 6 measures counterclockwise movement, the speed of the ratchet group 2 exceeds the preset value, and the brake 5 absorbs the displacement disk 4 while driving the pawl 10 to move, so that the pawl 10 contacts the ratchet member 9, further braking the ratchet group 2 to prevent the elastic force of the arm strength device from being too large and the braking force of the ratchet groove 7 or the ratchet member 9 on one side from being insufficient.

[0021] The ratchet assembly 2 includes a rotating shaft 2a rotatably disposed in the bracket 1 and a ratchet disc 2b disposed on the rotating shaft 2a.

[0022] Preferably, a ratchet disc 2b can be provided on one side of the rotating shaft 2a, and a ratchet groove 7 is provided on the bracket 1 near the ratchet disc 2b; alternatively, a ratchet disc 2b can be provided on each side of the rotating shaft 2a, and the bracket 1 includes a front bracket 1a and a rear bracket 1b, and both the front bracket 1a and the rear bracket 1b are provided with ratchet grooves 7. When the brake 5 does not attract the displacement disc 4, the ratchet disc 2b does not contact the ratchet groove 7. When the brake 5 attracts the displacement disc 4, the rotating shaft 2a moves, and the ratchet disc 2b moves to the ratchet groove 7 in the bracket 1.

[0023] The displacement plate 4 is rotatably connected to the rotating shaft 2a, and the ratchet member 9 is connected to the rotating shaft 2a. After the brake 5 attracts the pawl 10 and moves, the displacement plate 4 drives the rotating shaft 2a to move, so that the ratchet plate 2b on the rotating shaft 2a contacts the ratchet groove 7 of the bracket 1.

[0024] The resilient member 3 is a clockwork disc or a torsion spring. The torsion spring and the clockwork disc are arranged on one side of the bracket and are connected to the rotating shaft. They can drive the rotating shaft to rotate and can also be replaced by other springs that achieve the same function.

[0025] A main control circuit board and battery can be provided, electrically connected to the battery, brake, and speed sensor. The speed sensor, brake, main control circuit board, and battery are all existing electrical devices in the art. Those skilled in the art should be familiar with conventional electronic component model selection and connection techniques. Based on the above description and accompanying drawings, and after a limited number of circuit connection experiments, those skilled in the art can fully reproduce the braking and collision avoidance function disclosed in this patent application and achieve the same technical effects.

[0026] A moving hole 4a is provided on the top side of the displacement disk, a convex shaft 1c rotatably connected to the moving hole is provided on the bracket, and a limit block 1d is provided on the bottom side of the displacement disk. When the brake is not braked, the displacement disk contacts the limit block. After the brake is braked, the displacement disk moves and contacts the contact sensor. It is also possible to not provide a moving hole and a limit block, and set springs on the upper and lower sides of the displacement disk for limiting, or set a torsion spring on the middle part of the ratchet group, and fix the torsion spring on the bracket, or any existing installation method that achieves the same function.

[0027] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0031] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details of the present invention without departing from the spirit and scope of the present invention as defined by the appended claims, and all of these changes are within the scope of protection of the present invention.

Claims

1. A protective device for an arm trainer, characterized in that: The invention comprises a bracket (1), a ratchet assembly (2) rotatably arranged in the bracket (1), a rebound member (3) arranged on one side of the ratchet assembly (2), a displacement disk (4) arranged on the other side of the ratchet assembly (2), a pawl (10) arranged on the displacement disk (4), a ratchet member (9) arranged on the ratchet assembly (2) on one side of the displacement disk (4), a brake (5) arranged on the bracket (1) and controlling the movement of the displacement disk (4), a speed sensor (6) arranged on the bracket (1) and connected to the ratchet assembly (2), and a ratchet groove (7) arranged on the bracket (1) near the ratchet assembly (2), wherein the ratchet assembly (2) comprises a rotatable ratchet assembly (2) rotatably arranged in the bracket (1). A shaft (2a), and a ratchet disc (2b) provided on the rotating shaft (2a), wherein one side of the brake (5) is provided on the bracket (1), and the other side is hingedly provided on the pawl (10). When the brake (5) needs the pawl (10) to brake, the built-in push rod of the brake (5) moves downward, and at the same time drives the pawl (10) to rotate to one side and engage with the ratchet member (9). At the same time, the displacement disc (4) loses support and moves, and the ratchet group (2) engages with the ratchet groove (7). When braking is not required, the brake (5) drives the pawl (10), and the pawl (10) rotates away from the ratchet member (9), and at the same time lifts the displacement disc (4) so ​​that the ratchet group (2) does not contact with the ratchet groove (7).

2. The protective device for an arm supporter according to claim 1, characterized in that: A contact sensor (8) for detecting the movement of the displacement plate (4) is provided on the other side of the bracket (1).

3. The protective device for an arm supporter according to claim 1, characterized in that: The resilient member (3) is a spring disc or a torsion spring.

4. The protective device for an arm supporter according to claim 1, characterized in that: The brake (5) is an electromagnet.

5. The protective device for an arm supporter according to claim 1, characterized in that: The brake (5) is a linear drive mechanism.

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