Title:
PHONOGRAPH CAPABLE OF AUTOMATICALLY ADJUSTING ROTATIONAL SPEED
Document Type and Number:
WIPO Patent Application WO/2024/032333
Kind Code:
A1
Abstract:
The present invention relates to the technical field of phonographs, and provides a phonograph capable of automatically adjusting a rotational speed. The present invention comprises a phonograph bracket and a rotating platter. The phonograph bracket is provided with a driving apparatus, a phonograph head component, a turntable spindle, and an MCU control main board. The rotating platter is detachably sleeved on the turntable spindle. The driving apparatus is movably connected to the rotating platter. The MCU control main board is electrically connected to the driving apparatus and the phonograph head component separately. A real-time rotational speed measurement apparatus is further arranged between the phonograph bracket and the rotating platter, and comprises a speed measuring disc and a photoelectric sensor. The photoelectric sensor is fixedly arranged on an upper surface of the phonograph bracket, the speed measuring disc is fixedly arranged on a lower surface of the rotating platter, the speed measuring disc and the photoelectric sensor are fitted with each other, and the photoelectric sensor is electrically connected to the MCU control main board. The present invention has the following beneficial effects: manual debugging is not needed, the rotational speed control accuracy is high, the tone quality is not easily changed, the product quality of the phonograph is greatly improved, and the production costs are significantly reduced.
Inventors:
LIU JIRU (CN)
JIANG HENGJIAN (CN)
LI ZHAOHAI (CN)
JIANG HENGJIAN (CN)
LI ZHAOHAI (CN)
Application Number:
PCT/CN2023/108095
Publication Date:
February 15, 2024
Filing Date:
July 19, 2023
Export Citation:
Assignee:
SHENZHEN JUNLAN ELECTRONIC LTD (CN)
International Classes:
G11B19/28
Foreign References:
| CN218214646U | 2023-01-03 | |||
| CN115171740A | 2022-10-11 | |||
| CN217933165U | 2022-11-29 | |||
| CN107705809A | 2018-02-16 | |||
| US3993315A | 1976-11-23 | |||
| CN101826329A | 2010-09-08 | |||
| CN102308335A | 2012-01-04 | |||
| CN109285564A | 2019-01-29 | |||
| TWM590301U | 2020-02-01 |
Attorney, Agent or Firm:
SHENZHEN HAI SHUN DA INTELLECTUALPROPERTY AGENCY CO., LTD (CN)
Download PDF: