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CN-115395820-B - Vibration energy collector for supplying power to electric toothbrush

CN115395820BCN 115395820 BCN115395820 BCN 115395820BCN-115395820-B

Abstract

The invention relates to a vibration energy collector for supplying power to an electric toothbrush, which comprises a vibration beam (1) and a vibration amplifying device, wherein the vibration beam (1) is an arched iron sheet with a plurality of concave surfaces and inner sides adhered with MFC sheets (2), and the vibration amplifying device comprises iron balls (3) and springs (4). Compared with the prior art, the invention has the advantages of high system output power, long service life, stable operation and the like.

Inventors

  • DAI DI
  • Yuan tianchen
  • YANG JIAN
  • SONG RUIGANG
  • MIAO XIAODAN

Assignees

  • 上海工程技术大学
  • 上海工程技术大学

Dates

Publication Date
20260421
Application Date
20220811
Priority Date
20220811

Claims (6)

  1. 1. The vibration energy collector for supplying power to the electric toothbrush is characterized by comprising a vibration beam (1) and a vibration amplifying device, wherein the vibration beam (1) is an arched iron sheet with a plurality of concave surfaces and an MFC sheet (2) adhered to the inner side of the concave surface, and the vibration amplifying device comprises an iron ball (3) and a spring (4); The vibration amplifying device comprises two iron balls (3) positioned at the upper end and the lower end of the vibration beam (1), and the iron balls (3) are connected through springs (4); the vibration amplifying device is arranged between the vibration beams (1); The diameter of the spring (4) is slightly smaller than the minimum diameter surrounded by the convex surfaces of the vibration beams (1); The diameter of the iron ball (3) is larger than the minimum diameter surrounded by the convex surfaces of the vibration beams (1).
  2. 2. The vibration energy collector for supplying power to the electric toothbrush according to claim 1, wherein the upper and lower ends of the vibration beam (1) are fixed in the grooves on the inner side of the electric toothbrush shell (5).
  3. 3. A vibration energy harvester for electric toothbrushes according to claim 2, wherein the height of the upper end of the recess is slightly greater than the thickness of the vibrating beam (1).
  4. 4. The vibration energy harvester for an electric toothbrush according to claim 2 wherein soft pads are provided on the inside of the grooves.
  5. 5. A vibration energy harvester for electric toothbrushes according to claim 1, characterized in that the electrodes of all MFC foils (2) are connected at both ends to an interface circuit by wires, converting the output alternating current into direct current.
  6. 6. A powered vibration energy harvester according to claim 1, characterized in that two MFC lamellae (2) are attached to each vibrating beam (1) inside the concave surface.

Description

Vibration energy collector for supplying power to electric toothbrush Technical Field The invention relates to the technical field of electric toothbrushes, in particular to a vibration energy collector for supplying power to an electric toothbrush. Background In order to better ensure the health of teeth of people, various electric toothbrushes which achieve the aim of cleaning by high-frequency vibration or sonic driving are appeared along with the continuous development of technology. The electric toothbrush can quickly decompose toothpaste into fine foam through high-frequency vibration, so that the tooth gaps are deeply cleaned, compared with a common toothbrush, the electric toothbrush can remove 38% of dental plaque, and meanwhile, the vibration of the electric toothbrush can promote the blood circulation of the oral cavity, so that the effect of massaging gum tissues is achieved. However, the electric toothbrush on the market at present mainly adopts battery power supply, needs to be replaced or charged regularly, is inconvenient to use, has short service life and is easy to pollute the environment. Vibration energy collectors currently studied mainly have two conversion modes, piezoelectric and electromagnetic. The piezoelectric vibration energy collection device has the advantages of simple structure, higher power density, higher output voltage and the like, but the traditional piezoelectric vibration energy collection device mainly adopts a piezoelectric ceramic piece, is very fragile and easy to weather, and is easy to crack in the working process of the collector, thereby influencing the recovery efficiency. Disclosure of Invention The invention aims to provide a vibration energy harvester for supplying power to an electric toothbrush. The invention aims at realizing the technical scheme that the vibration energy collector for supplying power to the electric toothbrush comprises a vibration beam and a vibration amplifying device, wherein the vibration beam is an arched iron sheet with a plurality of concave surfaces and inner sides adhered with MFC sheets, and the vibration amplifying device comprises an iron ball and a spring. The invention adopts the piezoelectric vibration energy acquisition device, and the piezoelectric effect is utilized to convert the vibration energy generated in the using process of the electric toothbrush into electric energy, so as to achieve the purpose of supplying energy to the electric toothbrush. The MFC (piezoelectric ceramic fiber sheet) sheet can provide higher performance, flexibility and reliability, is not easy to short circuit, weather and crack, has long service life, high electromechanical conversion efficiency and smaller rigidity, and is internally provided with electrodes, thus ensuring the working stability of the collector. The MFC sheet is adhered to the inner side of the vibration Liang Aomian, so that the deformation of the MFC sheet in the vibration process is larger, the MFC sheet is not easy to fall off, and the service life of the device is prolonged. Preferably, the MFC flakes are selected from commercially available M2807-P2, M2814-P3, and the like. Preferably, the vibration amplifying device is composed of two iron balls and a spring. Preferably, the vibration amplifying device comprises two iron balls positioned at the upper end and the lower end of the vibration beam, and the iron balls are connected through springs. The vibration amplifying device is simple in structure and high in reliability, iron balls are mutually linked and restrained, vibration generated in the using process can be better amplified, the vibration beam is obviously deformed, and therefore the output power of the system is improved. Preferably, the vibration amplifying device is disposed between the vibration beams. Further preferably, the diameter of the spring is slightly smaller than the minimum diameter enclosed by each vibration Liang Tumian. The vibration amplifying device is fixed by adopting the minimum diameter surrounded by the springs with the diameter slightly smaller than that of each vibration Liang Tumian, so that the vibration in multiple directions can be amplified by the vibration amplifying device while the vibration amplifying device is ensured to generate displacement in a reliable range, and the energy collection efficiency of the device is improved. Further preferably, the diameter of the iron ball is larger than the minimum diameter enclosed by each vibration Liang Tumian. Preferably, the upper and lower ends of the vibration beam are fixed in the grooves on the inner side of the electric toothbrush shell. Further preferably, the height of the upper end of the groove is slightly larger than the thickness of the vibration beam, so that the vibration beam can generate larger deformation when the electric toothbrush shell vibrates. Further preferably, soft gaskets are arranged on the inner sides of the grooves so as to reduce friction damping of