5 results about "Fish fin" patented technology

The application discloses a modular multi-stage adaptive variable stiffness bionic fish fin and a robotic fish. The bionic fish fin comprises a main driving part, a swing part, a first elastic member and a variable stiffness assembly. The swing part is hinged to the main driving part and swings with the main driving part. One end of the first elastic member is connected to the main driving part, and the other end is connected to the swing part. The variable stiffness assembly comprises a second elastic member and a second traction cable. One end of the second elastic member is connected to the main driving part, and the other end is connected to the second traction cable. The second traction cable is connected to the swing part. The length of the second traction cable is greater than the distance between the swing part and the second elastic member. The first elastic member is used to provide a first reset force to drive the swing part to reset. When the swing part swings greatly, the second elastic member provides a second reset force to the swing part to assist in driving the swing part to reset, so that the bionic fish fin can realize graded stiffness adjustment under different swing amplitudes without the need for additional power sources or control systems.

1. Name of this design: Spray gun tail (shark fin). 2. Purpose of this design: This partial design is used as the tail of a spray gun; the entire spray gun is used for spraying. 3. The key design feature of this product is the shape of the spray gun's tail. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. Other matters requiring explanation: This design patent application is a partial design patent application. The gray-covered parts in each figure are the parts of the partial design that are not claimed for protection, while the parts outside the gray in the figures are the content for which patent protection is sought. This application does not claim protection for color; color is only used to distinguish the partial appearance design that needs protection.

This invention relates to an amphibious variable stiffness fin controlled by shape memory alloy, comprising: a pectoral fin root mounting base, a rotatable coaxial center, a fixed boundary main fan bone, an intermediate driven fan bone, a driving boundary main fan bone, a flexible film, an arc-shaped groove, a cylindrical slider, a first baffle, and a second baffle. The fixed boundary main fan bone is fixed to the rotatable coaxial center, and the driving boundary main fan bone rotates around the rotatable coaxial center. The intermediate driven fan bone is located between the fixed boundary main fan bone and the driving boundary main fan bone, and is mounted on the pectoral fin root mounting base via the rotatable coaxial center. The arc-shaped groove is mounted on the pectoral fin root mounting base with the coaxial center as its center. The root driving part of the driving boundary main fan bone is rigidly connected to the cylindrical slider. The first baffle and the second baffle are located on both sides of the arc-shaped groove. Compared with the prior art, this invention has the advantages of simple control logic and better adaptability to water-land transition conditions.

1. Name of the product in this design: Swimsuit (Fish Fin). 2. Intended use of this design: for swimming equipment. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application relates to a bionic jellyfish robot driven by a bistable soft actuator. The bionic jellyfish robot comprises a head assembly and a propulsion mechanism, the head assembly comprises a shell and a control system, the control system comprises a pneumatic telescopic cylinder; the propulsion mechanism comprises a bistable soft actuator connected with the pneumatic telescopic cylinder, the bistable soft actuator is driven to realize first and second stable state switching through the pneumatic telescopic cylinder; the bistable soft actuator is obtained by cross combination of a plurality of bistable curved beams sharing a top surface, first soft hinges are arranged on both sides of the top of each bistable curved beam outside the top surface, and a fish fin structure is arranged on each bistable curved beam; when the pneumatic telescopic cylinder is actuated, the bistable soft actuator realizes jumping between the first and second stable states through the first soft hinges. The bionic jellyfish robot has a unique bistable soft actuator structure design, can achieve the collaborative matching of low driving force and high output energy, and simultaneously decouples the pulse propulsion and steering functions, thereby avoiding the shortcomings of propulsion efficiency and steering sensitivity constraints.