Bumpers and bumpers pieces thereof
By designing a bar plate with the first and second epitaxial bodies, counterweight adjustment assembly structure and base body, the difficulties in the existing bar plate in providing weight adjustment and unstable physical effects are solved, and a more convenient and realistic training effect is achieved.
Patent Information
- Application Number
- CN202510555870.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2025-06-17
AI Technical Summary
Existing bars have difficulties in weight adjustment and providing unstable physical effects, resulting in inconvenient training and unrealistic effects.
A bar plate is designed, and its bar plate substrate has a first and second epitaxial bodies, a counterweight adjustment assembly structure and a base body, through which a larger swing amplitude and moment of inertia are provided, and a micro-level weight adjustment is achieved through the assembly of the counterweight parts.
It improves the convenience and authenticity of training, avoids dependence on other complex appearances and materials, and ensures the authenticity of training effects.
Smart Images
Figure CN120154864A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a training device for core training exercises, and particularly to a barbell and barbell plates mainly used for muscle strength training in sports competitions and fitness training. Background Art
[0002] Currently, the existing barbell plates are mainly circular in shape, with fixed sizes and shapes, and the weights are made according to international specifications. When changing the weight, the overall weight can only be adjusted by increasing or decreasing the number of plates hanging on the bar axis. Therefore, it involves the operation of installing and removing barbell plates of various kilogram levels up and down, which is very time-consuming and laborious, increasing the complexity of use.
[0003] In addition, if an unstable physical effect or a specific impact stimulus needs to be provided, additional devices with moving capabilities are required. For example: adding an off-axis motor inside the barbell, standing on a variably moving ground, hanging iron chains outside the barbell plates, tying elastic rubber materials to the barbell plates, or filling water into the barbell plates, etc. Generally speaking, it can be classified into two major types: unstable external environment and unstable load-bearing devices.
[0004] Among them, for the unstable external environment, there are defects that are completely different from most real sports competition states.
[0005] For the unstable load-bearing devices, the main problem is that there is too much external mechanical kinetic energy control, which is not a projection of the real situation in sports competition scenarios. Taking an off-axis motor as an example, the vibration and oscillation frequency generated, whether in terms of the stimulus source frequency, stimulus intensity, and controllable training potential, is not the same as the situation of the athlete's real internal body movement deviation; taking a weighted iron chain as an example, the length of the iron chain and the trajectory of the movement may interfere, resulting in uncontrollable unexpected movements and causing out-of-control injuries; or the water-filled plates, which are the closest to the real original state, because the density of water is relatively low, the generated fluctuations are too large and deviate too much from the interference simulation required by the athlete, and it is also easy to cause out-of-control injuries. Moreover, due to the fragility of the plastic material, it is also easy to cause damage, etc. Therefore, if measured by the simulation principle in sports training science, the designs of this type are difficult to be recognized and converted into the training effects of the original specific technical capabilities.
[0006] Therefore, there is an urgent need for a barbell and barbell plates to overcome one or more of the above defects. Summary of the Invention
[0007] An object of the present invention is to provide barbell plates, which on the one hand improve the convenience of use, and on the other hand do not require relying on other complex shapes and different material equipment for assistance in training under real sports competition states, thereby ensuring the true reliability of the training effect.
[0008] Another object of the present invention is to provide barbell plates, which on the one hand improve the convenience of use, and on the other hand do not need to rely on other complex shapes and different material equipment for assistance during training in the real sports competition state, so as to ensure the authenticity and reliability of the training effect.
[0009] To achieve the above object, the barbell plate of the present invention includes a barbell plate base, and the barbell plate base has a first extension body, a second extension body, a weight adjustment assembly structure and a base body. An assembly hole for assembling and connecting with an external bar shaft is opened at the first end of the base body; the first extension body and the second extension body extend in opposite directions and protrude from the opposite second end of the base body, and the first extension body and the second extension body also surround the center line of the assembly hole or a center line parallel to the center line of the hole and are separated from each other; the weight adjustment assembly structures are multiple and are separated from each other and arranged together around the center line of the assembly hole or the center line.
[0010] Compared with the prior art, by means of the design of "an assembly hole for assembling and connecting with an external bar shaft is opened at the first end of the base body, the first extension body and the second extension body extend in opposite directions and protrude from the opposite second end of the base body, and the first extension body and the second extension body also surround the center line of the assembly hole or a center line parallel to the center line of the hole and are separated from each other", the shape of the barbell plate base is similar to the shape of an anchor, so that the barbell plate of the present invention can provide a larger swing amplitude and moment of inertia; in terms of weight adjustment, by assembling counterweights on different weight adjustment assembly structures, a micro-level weight adjustment can be achieved, so that the barbell plate of the present invention provides a more delicate training application. Since the weight adjustment of the barbell plate of the present invention only needs to assemble the counterweights on different weight adjustment assembly structures, on the one hand, it is convenient to use without taking time and effort, and on the other hand, it does not need to rely on other complex shapes and different material equipment for assistance, and training is carried out in the real sports competition state, so as to ensure the authenticity of the training effect. Therefore, the comparison effect of the barbell plate of the present invention with the prior art described in the background technology is as follows:
[0011] (1) For the existing circular barbell plates, since the shape, size and weight of each barbell plate are fixed and unchangeable, they can only be used by sleeving them on the bar shaft in a larger step combination; while the barbell plate of the present invention only adds counterweights with a smaller step to immediately increase or decrease the weight load effect, without having to laboriously disassemble and assemble barbell plates of various kilogram quantities up and down, which increases the convenience of actual use at the training site.
[0012] (2) The special training mode of unstable stimulation demand relies on other complex shapes and auxiliary equipment of different materials. However, it can only provide relatively single and low-variability effects. The barbell plates of the present invention are used in combination with the bar shaft, fully conforming to the original usage habits and safety cognitions, without the need to use various auxiliary equipment with different shapes and materials, avoiding various troubles such as difficult arrangement, equipment damage, safety concerns, and limited effects.
[0013] (3) In terms of the external environment unstable training system, it is completely different from most real sports competition states. Therefore, from the perspective of the theory of motor nerve control, it is different nerve control modes. The barbell plates of the present invention do not change the state of the earth's gravity on the user's real standing or various postures. It only amplifies the power flow state that may interfere with action control within itself through physical design, increasing the awareness and recognition intensity of self-perceived action bias, enabling the trainee to activate a more effective and strong self-control nerve action mode in neurophysiology, and achieving the training of enhancing the body stability and coordination ability under the challenge of external force load.
[0014] (4) For the holding and loading devices (wearing, holding, and carrying): The main problem is that there are too many external mechanical kinetic energy controls, which is not a projection of the real situation in the sports competition scenario. Taking the eccentric motor as an example, the vibration and oscillation frequency generated are not the same as the real internal self-body movement bias of the athlete in terms of the stimulation source frequency, stimulation intensity, controllable training potential, etc.; taking the weighted iron chain as an example, the length of the iron chain and the movement trajectory may interfere, resulting in uncontrollable unexpected movements and causing out-of-control injuries; or the water-filled plate, which is the closest to the real original state. Because the density of water is low, the generated fluctuations are too large and deviate too much from the interference simulation required by the athlete, and it is also easy to cause out-of-control injuries. Moreover, due to the fragility of the plastic material, it is also easy to cause damage, etc. Therefore, if this type of design is measured by the simulation principle in sports training science, it is very difficult to obtain recognition and convert it into the training effect of the original special technical ability. In the barbell plates of the present invention, because it adheres to the principle of 'not changing the original movement mechanics principle, only amplifying the individual's subtle internal bias, and not entering the "over-design misunderstanding"', it can achieve the original intention of providing effective unstable stimulation training, and at the same time can truly meet the basic requirements of training safety protection, which is the key to product design. As for other aspects such as the convenience of arrangement, the durability of the equipment, the ease of use of the device, and the economy of the cost, they have become part of the additional value of this design.
[0015] Preferably, the first extension body and the second extension body are symmetric with each other.
[0016] Preferably, the base body is symmetrically arranged with the symmetry plane of the first epitaxial body and the second epitaxial body as the center, the center line of the assembly hole is located in the symmetry plane, and the center line is located in the symmetry plane.
[0017] Preferably, in the direction of the second end of the base body towards the first end of the base body, the first end of the base body protrudes relative to the first epitaxial body and the second epitaxial body, and the base body has a necking structure with an arc-shaped narrowing at the position between its first end and the second end.
[0018] Preferably, the center line is located between the center line of the assembly hole and the second end of the base body.
[0019] Preferably, the outer contours of the first epitaxial body, the second epitaxial body and the base body are located on a first cylindrical surface with the center line of the assembly hole or the center line as the center line.
[0020] Preferably, the inner contours of both the first epitaxial body and the second epitaxial body are located on a second cylindrical surface with the center line of the assembly hole or the center line as the center line.
[0021] Preferably, the inner contours on both sides of the first epitaxial body and the second epitaxial body are each arc-transitioned with the base body.
[0022] Preferably, all the weight adjustment and assembly structures are arranged at equal intervals; some of all the weight adjustment and assembly structures are located on the second end of the base body, some of all the weight adjustment and assembly structures are located on the first epitaxial body, and the remaining ones of all the weight adjustment and assembly structures are located on the second epitaxial body.
[0023] Preferably, the barbell plate of the present invention further includes a weight member for being assembled and connected with the weight adjustment and assembly structure, and the weight member can be selectively assembled and connected with any one of the weight adjustment and assembly structures.
[0024] Preferably, the weight adjustment and assembly structure is a threaded hole, and the weight member correspondingly has an external thread structure threadedly connected with the threaded hole; alternatively, the weight adjustment and assembly structure is an external thread structure, and the weight member correspondingly has a threaded hole threadedly connected with the external thread structure.
[0025] Preferably, the external thread structure or the threaded hole is located at the center of the weight member.
[0026] Preferably, the weight member is a cylinder or a regular prism.
[0027] To achieve the above object, the barbell of the present invention includes a bar shaft and the aforementioned barbell plate, and the bar shaft is fittingly inserted into the assembly hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 is a perspective view of the barbell of the present invention.
[0029] Figure 2 is a perspective view of the barbell plate in the barbell of the present invention, and the counterweight in this figure is assembled and connected to the counterweight adjustment and assembly structure at the leftmost side.
[0030] Figure 3 is at Figure 2 is a state diagram when the counterweight is assembled and connected to the fourth counterweight adjustment and assembly structure from the left.
[0031] Figure 4 is at Figure 2 is a state diagram when the counterweight is assembled and connected to the rightmost counterweight adjustment and assembly structure.
[0032] Figure 5 is Figure 4 is a perspective exploded view.
[0033] Figure 6 is Figure 5 is a plan view seen from above after hiding the counterweight.
[0034] Figure 7 is at Figure 6 is a plan view further showing the first cylindrical surface and the second cylindrical surface on the basis of
[0035] Figure 8 is Figure 5 is a perspective view of the counterweight in
[0036] Figure 9 is a perspective view of another form of the counterweight. DETAILED DESCRIPTION OF THE INVENTION
[0037] In order to describe in detail the technical content and structural features of the present invention, the following further description is made in conjunction with the embodiments and with reference to the drawings.
[0038] Please refer to Figure 1 , the barbell 100 of the present invention is mainly applied to muscle strength training in sports competitions and sports fitness training. It includes a barbell plate 100 and a bar shaft 200. The bar shaft 200 is fittingly inserted into the assembly hole 141 (to be mentioned below) of the barbell plate 100 to achieve the purpose of assembling the bar shaft 200 and the barbell plate 100 together. It should be noted that although Figure 1 only shows that the number of barbell plates 100 on the bar shaft 200 is two, obviously, according to actual needs, the number of barbell plates 100 can also be other numbers, which is set according to the specifications of the barbell 100, so it is not limited by Figure 1 shown.
[0039] Combined with Figure 6 and Figure 7 , as an example, the barbell plate 100 includes a barbell plate base 10 and a counterweight member 20. The barbell plate base 10 has a first extension body 11, a second extension body 12, a counterweight adjustment and assembly structure 13, and a base body 14. An assembly hole 141 for assembling and connecting with the bar shaft 200 is provided at the first end 14a of the base body 14. Optionally, in Figures 1 to 5 , as an example, the assembly hole 141 is a circular hole to facilitate the machining and manufacturing of the assembly hole 141 on the base body 14. Obviously, according to actual needs, the assembly hole 141 can also be a regular polygon hole or an elliptical hole, etc., so it is not limited by Figure 6 and Figure 7 shown. It should be noted that since the assembly hole 141 is assembled and connected with the bar shaft 200, correspondingly, the lateral outer contour of the position of the bar shaft 200 for assembling with the assembly hole 141 is circular, regular polygon or elliptical, etc.
[0040] Combined with Figures 2 to 5 again, as an example, the first extension body 11 and the second extension body 12 extend in opposite directions and protrude from the opposite second end 14b of the base body 14. For example, in Figures 1 to 7 , as an example, the first extension body 11 extends arcuately from the left and protrudes from the second end 14b of the base body 14, and the second extension body 12 extends arcuately from the right and protrudes from the second end 14b of the base body 14. Obviously, according to actual needs, it is also possible to make the first extension body 11 extend linearly from the left and protrude from the second end 14b of the base body 14 and the second extension body 12 extend linearly from the right and protrude from the second end 14b of the base body 14, so it is not limited by Figures 1 to 7 shown; in addition, the first extension body 11 and the second extension body 12 are also arranged around a center line C2 parallel to the center line C1 of the assembly hole 141 and are separated from each other, as shown in Figure 7 . The counterweight adjustment and assembly structures 13 are eight arranged separately and jointly around the center line C2. Obviously, according to actual needs, the number of the counterweight adjustment and assembly structures 13 can also be two, three, four, five, six, seven, nine or more, so it is not limited by Figures 5 to 7 shown.
[0041] The counterweight member 20 is used to be assembled and connected with the counterweight adjustment and assembly structure 13, and the counterweight member 20 can be selectively assembled and connected with any one of the counterweight adjustment and assembly structures 13; among them, Figure 2 shows that the counterweight member 20 is assembled and connected with the leftmost counterweight adjustment and assembly structure 13, Figure 3 shows that the counterweight member 20 is assembled and connected with the fourth counterweight adjustment and assembly structure 13 counted from the left, Figure 4It shows that the counterweight 20 is assembled and connected to the rightmost counterweight adjustment and assembly structure 13; therefore, by selecting different counterweight adjustment and assembly structures 13 for assembly connection with the counterweight 20, the counterweight 20 is positioned at different positions on the barbell base 10, and by virtue of the physical principle of inertial motion, swings with different amplitudes and impacts on body stability naturally occur. It should be noted that although Figures 2 to 4 it shows that only one counterweight 20 is assembled and connected to different counterweight adjustment and assembly structures 13 to achieve the purpose of fine weight adjustment. Obviously, according to actual needs, multiple counterweights 20 can also be assembled and connected to the corresponding counterweight adjustment and assembly structures 13, which can also achieve the purpose of weight adjustment. More specifically, as follows:
[0042] As Figure 6 shown, as an example, the first extension body 11 and the second extension body 12 are symmetric to each other, and the base body 14 is symmetrically arranged with the symmetry plane P1 of the first extension body 11 and the second extension body 12 as the center, so as to facilitate the manufacturing and processing of the barbell plate 100; at this time, the center line C1 of the assembly hole 141 is located in the symmetry plane P1, and the center line C2 is located in the symmetry plane P1, and the state is shown in Figure 6 and Figure 7 shown; alternatively, in Figure 6 and Figure 7 as an example, the center line C2 is located between the center line C1 of the hole and the second end 14b of the base body 14, so that the shaking feeling of the barbell plate 100 when the counterweight 20 is connected to different counterweight adjustment and assembly structures 13 is more obvious. Specifically, in Figures 1 to 7 as an example, in the direction of the second end 14b of the base body 14 towards the first end 14a of the base body 14, the first end 14a of the base body 14 protrudes relative to the first extension body 11 and the second extension body 12, and the base body 14 has a necking structure 14c with an arc-shaped narrowing at the position between its first end 14a and the second end 14b; thus, such a design facilitates the grasping operation of the barbell plate 100 by the operator during the installation and disassembly of the barbell plate 100, thereby improving the reliability of the operator's grasping of the barbell plate 100; in addition, in Figure 6 and Figure 7Among them, as an example, the outer contour 111 of the first extension body 11, the outer contour 121 of the second extension body 12, and the outer contour 141 of the base body 14 are located on the first cylindrical surface P2 with the center line C2 as the center line. The outer contour 111 of the first extension body 11, the outer contour 121 of the second extension body 12, and the outer contour 141 of the base body 14 are designed in a way that is eccentric relative to the center line C1 of the assembly hole 141. On the one hand, this enables the barbell plate 100 to more effectively provide a larger swing amplitude and moment of inertia. On the other hand, the outer arc radian and radius of the barbell plate 100 are the same as those of the existing international barbell plates, thus ensuring the compatibility of the barbell plate 100 with the existing international barbell plates. In addition, in Figure 6 and Figure 7 Among them, as an example, the inner contour 112 of the first extension body 11 and the inner contour 122 of the second extension body 12 are located on the second cylindrical surface P3 with the center line C2 as the center line. The inner contour 112 of the first extension body 11 and the inner contour 122 of the second extension body 12 are designed in a way that is eccentric relative to the center line C1 of the assembly hole 141. Therefore, the barbell plate 100 can more effectively provide a larger swing amplitude and moment of inertia. Among them, in order to avoid stress concentration and facilitate manufacturing, in Figure 6 and Figure 7 Among them, as an example, the inner contour 112 of the first extension body 11 has an arc transition with the base body 14, and the inner contour 122 of the second extension body 12 has an arc transition with the base body 14. The arc transition structure is shown by the reference numeral 15.
[0043] As Figures 6 to 7 shown, as an example, all the weight adjustment and assembly structures 13 are arranged at equal intervals to ensure that the shaking feeling of the barbell plate 100 is more obvious and orderly, which is suitable for quantitative calculation and standardized control. In addition, some of all the weight adjustment and assembly structures 13 are located on the second end 14b of the base body 14, some of all the weight adjustment and assembly structures 13 are located on the first extension body 11, and the remaining ones of all the weight adjustment and assembly structures 13 are located on the second extension body 12. Specifically, in combination with Figures 1 to 8 Among them, as an example, the weight adjustment and assembly structure 13 is a threaded hole, and the weight piece 20 correspondingly has an external thread structure 21 that is threadedly connected to the threaded hole, so as to facilitate the quick installation and disassembly of the weight piece 20 and facilitate the adjustment operation. Obviously, according to actual needs, the weight adjustment and assembly structure 13 can also be an external thread structure. Correspondingly, the weight piece 20 is correspondingly provided with a threaded hole, and the purpose of assembling and connecting the weight piece 20 to the barbell plate base 10 in a threaded connection manner can also be achieved. Therefore, it is not limited by Figures 1 to 8 shown. More specifically, in Figure 8 Among them, as an example, the external thread structure 21 is located at the center of the weight piece 20 to ensure that the center of gravity of the weight piece 20 is located on the center line of the weight piece 20. In addition, in Figure 8Among them, as an example, the counterweight 20 is a regular prism; obviously, according to actual needs, the counterweight 20` can also be Figure 9 the cylinder shown.
[0044] Compared with the prior art, by means of the design that "the first end 14a of the base body 14 is provided with an assembly hole 141 for assembling and connecting the bar shaft 200, the first extension body 11 and the second extension body 12 extend in opposite directions and protrude from the opposite second end 14b of the base body 14, and the first extension body 11 and the second extension body 12 are also arranged around the center line C1 of the assembly hole 141 or a center line C2 parallel to the center line C1 of the hole and are separated from each other", the outer shape of the barbell plate base 10 is similar to the outer shape of the anchor, so that the barbell plate 100 can provide a larger swing amplitude and moment of inertia; in terms of weight adjustment, by assembling the counterweight 20 on different counterweight adjustment assembly structures 13, the adjustment of micro-level weight can be achieved, so that the barbell plate 100 provides more delicate training applications. Since the weight adjustment of the barbell plate 100 only requires assembling the counterweight 200 on different counterweight adjustment assembly structures 13, on the one hand, it is convenient to use without taking time and effort, and on the other hand, it does not need to rely on other complex shapes and different material equipment for assistance, and is trained in the real sports competition state, so as to ensure the authenticity of the training effect. Therefore, the comparison effect of the barbell plate 100 with the prior art described in the background art is as follows:
[0045] (1) The existing circular barbell plates have fixed shapes, sizes and weights for each barbell plate, so they can only be used by sleeving them on the bar shaft in a larger step combination; while the barbell plate 100 of the present invention only adds a counterweight 20 with a smaller step to immediately increase or decrease the weight load effect, without having to laboriously disassemble and assemble barbell plates of various grades and kilogram quantities, which increases the convenience of actual use at the training site.
[0046] (2) The unstable stimulation requires special training modes that rely on other complex shapes and different material equipment for assistance, but they can only provide relatively single and low-variability effects. While the barbell plate 100 of the present invention is used in combination with the bar shaft 200, which completely conforms to the original usage habits and safety cognitions, without having to use various accessory devices with different shapes and materials, avoiding various troubles such as difficult sorting, equipment damage, safety concerns and limited effects.
[0047] (3)In the case of an external environment unstable training system, it is completely different from most real sports competition states. Therefore, from the perspective of the theory of motor nerve control, different nerve control modes are involved. The barbell plate 100 of the present invention does not change the state of the earth's gravity on the user's real standing or various postures. It only amplifies, through physical design, the power flow state contained within itself that may interfere with movement control, increases the awareness and cognitive intensity of self-perceived movement bias, and enables the trainee to activate a more effective and intense self-control nerve action mode in neurophysiology, so as to achieve the training of enhancing the body stability and coordination ability under the challenge state of external force load.
[0048] (4)Regarding the holding and loading devices (wearing, holding, and carrying): The main problem is that there are too many external mechanical kinetic energy controls, which are not projections of the real situation in sports competition scenarios. Taking an off-axis motor as an example, the vibration and oscillation frequency generated are not the same as the real internal self-body movement bias of athletes in terms of the stimulation source frequency, stimulation intensity, controllable training potential, etc. Taking a weighted iron chain as an example, the length of the iron chain and the trajectory of the movement action may interfere, resulting in uncontrollable unexpected movements and leading to out-of-control injuries. Or, for the water-filled plate that is closest to the real original state, because the density of water is low, the generated fluctuations are too large and deviate too much from the interference simulation required by the athlete, and it is also prone to the risk of out-of-control injuries. Moreover, due to the fragility of the plastic material, it is also easy to cause damage, etc. Therefore, if this type of design is measured according to the simulation principle in sports training science, it is difficult to obtain recognition and convert it into the training effect of the original special technical ability. In the barbell plate 100 of the present invention, because it adheres to the principle of 'not changing the original movement mechanics principle, only amplifying the subtle internal bias of the individual, and not entering the "over-design misunderstanding"', it can achieve the original intention of providing effective unstable stimulation training, and at the same time can truly meet the basic requirements of training safety protection, which is the key to product design. As for other aspects such as the convenience of sorting, the durability of the equipment, the ease of use of the device, and the economy of the cost, they have become part of the additional value of this design.
[0049] It should be noted that although the drawings show that the first extension body 11 and the second extension body 12 are arranged around the center line C2 parallel to the hole center line C1 and are separated from each other, and all the weight adjustment and assembly structures 13 are arranged around the center line C2 together; obviously, according to actual needs, the first extension body 11 and the second extension body 12 can also be made to be arranged around the hole center line C1 and all the weight adjustment and assembly structures 13 can be made to be arranged around the hole center line C1 together. Therefore, it is not limited to what is shown in the drawings. In addition, the barbell base 10 and the weight members 20 (20`) can be produced by lathe technology or casting technology, and then rubber coating treatment can be carried out subsequently.
[0050] The above-disclosed are only the preferred examples of the present invention. Certainly, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.
Claims
1. A lever sheet, comprising a lever sheet base, characterized in that: The lever plate base has a first extension, a second extension, a counterweight adjustment assembly structure and a base. The first end of the base is provided with an assembly hole for assembly and connection with an external lever shaft. The first extension and the second extension extend in opposite directions and protrude from the second end opposite to the base. The first extension and the second extension are also arranged around the center line of the assembly hole or a center line parallel to the center line and are separated from each other. The counterweight adjustment assembly structure is a plurality of structures separated from each other and arranged around the center line or the center line of the hole.
2. The lever sheet according to claim 1, characterized in that: The first epitaxial body and the second epitaxial body are symmetrical to each other, the substrate is symmetrically arranged with the symmetry plane of the first epitaxial body and the second epitaxial body as the center, the center line of the assembly hole is located in the symmetry plane, and the center line is located in the symmetry plane.
3. The lever sheet according to claim 1, characterized in that: In the direction from the second end of the substrate toward the first end of the substrate, the first end of the substrate is protruding relative to the first and second extension bodies, and the substrate has an arc-shaped narrowing neck structure at a position between the first and second ends.
4. The lever sheet according to claim 1, characterized in that: The center line is located between the center line of the assembly hole and the second end of the substrate; the outer contours of the first epitaxial body, the second epitaxial body and the substrate are located on a first cylindrical surface with the center line of the assembly hole or the center line as the center line; the inner contours of the first epitaxial body and the second epitaxial body are located on a second cylindrical surface with the center line of the assembly hole or the center line as the center line; the inner contours on both sides of the first epitaxial body and the second epitaxial body each transition to the substrate in an arc shape.
5. The lever sheet according to claim 1, characterized in that: All of the counterweight adjustment assembly structures are arranged at equal intervals; some of the counterweight adjustment assembly structures are located on the second end of the base, other of the counterweight adjustment assembly structures are located on the first extension body, and the remaining of the counterweight adjustment assembly structures are located on the second extension body.
6. The lever sheet according to claim 1, characterized in that: It also includes a counterweight member for assembly and connection with the counterweight adjustment assembly structure, and the counterweight member can be selectively assembled and connected with any of the counterweight adjustment assembly structures.
7. The lever sheet according to claim 6, characterized in that: The counterweight adjustment assembly structure is a threaded hole, and the counterweight component has an external threaded structure threadedly connected to the threaded hole; or, the counterweight adjustment assembly structure is an external threaded structure, and the counterweight component has a threaded hole threadedly connected to the external threaded structure.
8. The lever sheet according to claim 7, characterized in that: The external thread structure or threaded hole is located at the center of the counterweight.
9. The lever sheet according to claim 6, characterized in that: The counterweight is a cylinder or a regular prism.
10. A lever bell, comprising a lever shaft, characterized in that: The lever bell also includes a lever bell piece according to any one of claims 1 to 9, and the lever shaft is inserted into the assembly hole in a fitting manner.