A pendulum

Abstract

The utility model belongs to the technical field of ornaments, especially an ornament, which comprises a base and a fixed frame fixedly connected with the base, a plurality of rotating frames of nested levels and relative rotation are installed at one end of the fixed frame, a counterweight is fixedly connected to the rotating frame, a permanent magnet is fixedly connected to the bottom of the outermost rotating frame, an electromagnetic generator for applying kinetic energy to the permanent magnet is arranged in the base, the rotating shafts of the rotating frames are not perpendicular to the ground, and the rotating shafts of the rotating frames are neither mutually overlapped nor mutually perpendicular, the rotating shafts of the rotating frames are arranged in a non-overlapping and non-orthogonal spatial distribution, the geometric symmetry of the system is broken, the non-linear degree of angular momentum coupling in the three-dimensional space is increased, the formation of resonance and periodic trajectories is inhibited, and thus the swinging trajectory of the chaotic pendulum has stronger unpredictability due to high sensitivity to initial conditions and complex coupling of degrees of freedom, and the ornamental value is significantly improved.

Description

Technical Field

[0001] This utility model belongs to the field of ornament technology, and specifically relates to an ornament. Background Technology

[0002] Traditional multi-ring nested desktop ornaments are a type of chaotic pendulum. Their oscillation pattern is unpredictable and has a certain aesthetic appeal. They are driven by an electromagnetic generator and permanent magnets, which in turn drive the outer rotating frame to rotate. However, to start, the outer rotating frame needs to be manually pushed to swing. When the permanent magnet approaches the electromagnetic generator, the generator generates a magnetic attraction force, accelerating the magnet's approach; or, just as the permanent magnet passes the generator, the generator generates a magnetic repulsion force, accelerating the repulsion of the permanent magnet. Sometimes, both magnetic attraction and repulsion forces are combined, allowing the outer rotating frame to continue swinging. However, in traditional ornaments of this type, the axes of the nested rotating frames, except for the outer frame, are generally at a 45-degree angle to the horizontal. Therefore, the axes of the multiple inner rotating frames may overlap or be perpendicular to each other. The rotation of the different inner rotating frames is more mechanical, and the rotation trajectory is relatively regular, reducing the unpredictable aesthetic appeal of the chaotic pendulum. Utility Model Content

[0003] To address the problems mentioned in the background section, this invention provides a decorative ornament whose swing trajectory exhibits greater unpredictability due to its high sensitivity to initial conditions and complex coupling of degrees of freedom, significantly enhancing its aesthetic value.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ornament, including a base and a fixed frame fixedly connected to the base, one end of the fixed frame is equipped with a plurality of concentric rotating frames nested in layers and rotating relative to each other, a counterweight is fixedly connected to the rotating frame, a permanent magnet is fixedly connected to the bottom of the outermost rotating frame, an electromagnetic generator for applying kinetic energy to the permanent magnet is provided in the base, the rotation axes of the plurality of rotating frames are not perpendicular to the ground, and the rotation axes of the plurality of rotating frames are neither overlapping nor perpendicular to each other, wherein the rotation axis of the outer rotating frame is horizontal to the ground.

[0005] As a preferred embodiment of this utility model, the line connecting the counterweight on the same rotating frame to the center of the rotating frame is perpendicular to the axis.

[0006] As a preferred embodiment of this utility model, in the inner rotating frame, the counterweight mass fixed on the outer inner rotating frame is greater than the counterweight mass fixed on the adjacent inner inner rotating frame.

[0007] As a preferred embodiment of this utility model, the rotating connection between the outer rotating frame and the fixed frame is coated with shear-thickening grease.

[0008] As a preferred embodiment of this utility model, the outer rotating frame rotates relative to the fixed ring on the inner side of the fixed frame via a rotating shaft. A ring shaft is provided between the fixed ring and the rotating shaft to reduce frictional resistance. The ring shaft is made of a non-conductive material, the rotating shaft is made of a magnetic material, and the fixed ring is made of a conductive material. The fixed ring is used to transmit direct current.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the rotation axes of several rotating frames are neither overlapping nor perpendicular to each other. By setting the rotation axes of several rotating frames to a non-overlapping and non-orthogonal spatial distribution, the geometric symmetry of the system is broken, the nonlinearity of angular momentum coupling in three-dimensional space is increased, and the formation of resonance and periodic trajectory is suppressed. As a result, the swing trajectory of the chaotic pendulum has stronger unpredictability due to its high sensitivity to initial conditions and complex coupling of degrees of freedom, which significantly enhances its ornamental value. Attached Figure Description

[0010] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is an exploded view of the mating structure of the fixing ring in this utility model;

[0013] In the picture:

[0014] 1. Base; 2. Fixing frame; 3. Outer rotating frame; 4. Inner rotating frame A; 5. Inner rotating frame B; 6. Counterweight ball; 7. Permanent magnet; 8. Electromagnetic generator; 9. Rotating shaft; 10. Fixing ring; 11. Ring shaft. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1-2 As shown:

[0017] An ornament includes a base 1 and a fixed frame 2 fixedly connected to the base 1. One end of the fixed frame 2 is equipped with a plurality of concentric rotating frames that rotate relative to each other and are nested in a hierarchical manner. A counterweight is fixedly connected to the rotating frame. A permanent magnet 7 is fixedly connected to the bottom of the outermost rotating frame. An electromagnetic generator 8 for applying kinetic energy to the permanent magnet 7 is provided in the base 1. The rotation axes 9 of the plurality of rotating frames are not perpendicular to the ground, and the rotation axes 9 of the plurality of rotating frames do not overlap or perpendicular to each other. Among them, the rotation axis 9 of the outer rotating frame 3 is horizontal to the ground.

[0018] Traditional multi-ring nested desktop ornaments are a type of chaotic pendulum, whose oscillation pattern is unpredictable and has a certain aesthetic appeal. The outer rotating frame 3 is driven to rotate actively by the cooperation of an electromagnetic generator 8 and a permanent magnet 7. However, at startup, the outer rotating frame 3 needs to be manually pushed to swing. When the permanent magnet 7 approaches the electromagnetic generator 8, the electromagnetic generator 8 generates a magnetic attraction force, accelerating the approach of the permanent magnet 7; or when the permanent magnet 7 has just passed the electromagnetic generator 8, the electromagnetic generator 8 generates a magnetic repulsion force, accelerating the repulsion of the permanent magnet 7. Sometimes, both magnetic attraction and repulsion forces are combined, thus allowing the outer rotating frame 3 to continue swinging. However, in traditional ornaments of this type, the axes of the multiple nested rotating frames, except for the outer rotating frame 3, are generally at a 45-degree angle to the horizontal. Therefore, the axes of multiple inner rotating frames may overlap or be perpendicular to each other. The rotation of different inner rotating frames is more mechanical, and the rotation trajectory is relatively regular, reducing the unpredictable aesthetic appeal of the chaotic pendulum.

[0019] By setting the rotation axes 9 of several rotating frames to be neither overlapping nor perpendicular to each other, and by setting the rotation axes 9 of several rotating frames to be non-overlapping and non-orthogonal in spatial distribution, the geometric symmetry of the system is broken, the nonlinearity of angular momentum coupling in three-dimensional space is increased, and the formation of resonance and periodic trajectory is suppressed. As a result, the swing trajectory of the chaotic pendulum has stronger unpredictability due to its high sensitivity to initial conditions and complex coupling of degrees of freedom, which significantly enhances its viewing value.

[0020] In an optional embodiment, the line connecting the counterweight on the same rotating frame to the center of the rotating frame is perpendicular to the axis.

[0021] In this embodiment, by setting the radial connecting line of the counterweight of the rotating frame to be perpendicular to the rotating axis 9, the spatial distribution of the moment of inertia is optimized, so that the centrifugal force and the gravity rectangle form a non-collinear three-dimensional composite torque, which enhances the nonlinear coupling of multi-axis motion, while avoiding the regular constraint of the motion on the axial torque. As a result, the trajectory of the momentum of the chaotic pendulum has higher unpredictability due to the three-dimensional divergence characteristics, taking into account both dynamic balance and anti-resonance performance.

[0022] In an optional embodiment, in the inner rotating frame, the counterweight mass fixed on the outer inner rotating frame is greater than the counterweight mass fixed on the adjacent inner inner rotating frame.

[0023] In this embodiment, as Figure 1 As shown, the inner rotating frame includes inner rotating frame A4 and inner rotating frame B5. A counterweight ball 6 is fixedly connected to both inner rotating frame A4 and inner rotating frame B5. The permanent magnet 7 at the bottom of the outer rotating frame 3 also has the function of counterweight. By setting a counterweight mass greater than that of the adjacent inner layers in the outer inner rotating frame, an asymmetric energy transfer path is formed from the outer layer drive to the inner layer response, which expands the natural frequency difference of each layer to suppress the frequency locking phenomenon. At the same time, the inertial advantage of the large-mass outer layer is used to enhance the anti-interference ability. Finally, through the nonlinear coupling of multi-axis motion and the characteristics of high-dimensional chaotic attractors, the unpredictability of the swing trajectory is improved.

[0024] In an optional embodiment, the rotating connection between the outer rotating frame 3 and the fixed frame 2 is coated with shear-thickening grease.

[0025] In this embodiment, the swing amplitude and swing speed of the traditional outer rotating frame 3 are significantly higher than those of the inner rotating frame. From an aesthetic point of view, it gives people a sense of disjointed movement and looks particularly uncomfortable. This problem mainly occurs when the outer rotating frame 3 swings down under gravity and when it is actively accelerated after being accelerated by the electromagnetic generator 8. The frequency of the back and forth is too fast. Since the acceleration of the electromagnetic generator 8 is not easy to change, the speed of the outer rotating frame 3 when it swings down under gravity can be reduced.

[0026] Shear-thickening grease can be a grease with siloxane as the base oil and mainly added silica nanoparticles or high molecular polymers. When rotating at high speed, the silica particles or polymer chains entangle with each other to form a high-viscosity network, increasing the resistance. At low speed, the particles disperse and the viscosity decreases. Ultimately, the greater the swing speed of the outer rotating frame 3, the greater the rotational resistance, thereby reducing the speed of the outer rotating frame 3 when it swings down. Of course, there is an upper limit to the increase in resistance of shear-thickening grease. When the electromagnetic generator 8 actively drives the permanent magnet 7 to move, a larger current needs to be applied.

[0027] In an optional embodiment, the outer rotating frame 3 rotates relative to the fixing ring 10 inside the fixing frame 2 via the rotating shaft 9. A ring shaft 11 is provided between the fixing ring 10 and the rotating shaft 9 to reduce frictional resistance. The ring shaft 11 is made of a non-conductive material, the rotating shaft 9 is made of a magnetic material, and the fixing ring 10 is made of a conductive material. The fixing ring 10 is used to transmit direct current.

[0028] In this embodiment, the above-mentioned embodiment of coating shear-thickening grease has the advantage of being inexpensive, but the disadvantages are also obvious. It requires increasing the power of the electromagnetic generator 8, and there is also the problem of shear-thickening grease loss leading to functional failure.

[0029] When the outer rotating frame 3 begins to swing downwards, a direct current is supplied to the fixed ring 10. When the direct current passes through the fixed ring 10, it generates a constant magnetic field with unchanged direction and intensity, which forms a stable magnetic coupling with the permanent magnet magnetic field of the rotating shaft 9 made of magnetic material. The relative motion between the constant magnetic field and the rotating shaft 9 will induce an eddy current effect (i.e., the faster the rotation speed, the larger the eddy current). The resistance increases with the rotation speed, thereby reducing the speed of the outer rotating frame 3 when it swings downwards. The fixed ring 10 can be made into a ring coil, which has a better effect.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ornament comprising a base (1) and a fixed frame (2) fixedly connected to the base (1), wherein one end of the fixed frame (2) is equipped with a plurality of concentric rotating frames nested in layers and rotating relative to each other, a counterweight is fixedly connected to the rotating frame, a permanent magnet (7) is fixedly connected to the bottom of the outermost rotating frame, and an electromagnetic generator (8) for applying kinetic energy to the permanent magnet (7) is provided in the base (1), characterized in that: The rotation axes (9) of several rotating frames are not perpendicular to the ground, and the rotation axes (9) of several rotating frames do not overlap or are perpendicular to each other. Among them, the rotation axis (9) of the outer rotating frame (3) is horizontal to the ground.

2. The ornament according to claim 1, characterized in that: The line connecting the counterweight on the same rotating frame to the center of the rotating frame is perpendicular to the axis.

3. The ornament according to claim 1, characterized in that: In the inner rotating frame, the counterweight mass fixed on the outer inner rotating frame is greater than the counterweight mass fixed on the adjacent inner inner rotating frame.

4. The ornament according to claim 1, characterized in that: The rotating connection between the outer rotating frame (3) and the fixed frame (2) is coated with shear-thickening grease.

5. The ornament according to claim 1, characterized in that: The outer rotating frame (3) rotates relative to the fixed ring (10) inside the fixed frame (2) via the rotating shaft (9). A ring shaft (11) is provided between the fixed ring (10) and the rotating shaft (9) to reduce frictional resistance. The ring shaft (11) is made of a non-conductive material, the rotating shaft (9) is made of a magnetic material, and the fixed ring (10) is made of a conductive material. The fixed ring (10) is used to pass direct current.

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