Food nutrition catering teaching device

Abstract

The present invention discloses a food nutrition catering teaching device. The food nutrition catering teaching device comprises a projector main body, a trigger device is arranged on the left side surface of an inner cavity of the projector main body, and a suspension rod is fixedly connected to the top surface of the projector main body. The triggering device, a dustproof device, a strain deviceand a release device are matched, the dustproof device can be automatically turned over when the projector main body works; the dustproof device is ensured not to influence the normal work of the projection lens; the dustproof device can be automatically closed when the projector main body stops working; normal operation of the dustproof function of the dustproof device is ensured; the cleaning device is matched with the driving device; the food nutrition catering teaching device can automatically wipe dust attached to the surface of the projection lens after work; and dust can be removed intime, the projection quality can be improved, the dust removal process is very simple, manual dust removal is not needed, the workload of maintenance personnel is reduced, and the practicability of the food nutrition catering teaching device is improved.

Description

technical field [0001] The invention relates to the field of teaching devices, more specifically, to a teaching device for food nutrition and catering. Background technique [0002] Nutritional catering is to design a diet for one day, one week or one month according to the needs of people's bodies and the content of various nutrients in the food, so that the human body can absorb several major nutrients such as protein, fat, carbohydrates, vitamins and minerals. A reasonable proportion means to achieve a balanced diet. Simply put, it requires a variety of dietary structures, including grains, meat, fruits, and vegetables. Specifically, nutritional catering is a scientific and healthy diet. It uses scientific nutrition Guided by theory, it is recommended to take a balanced intake of staple foods, proteins, fruits and vegetables, oils, etc., with a variety of ingredients to achieve balanced nutrition and maintain health. In the teaching process of food nutrition and catering,...

AI Technical Summary

Problems solved by technology

[0003] Existing projectors for food nutrition and catering teaching are generally fixed and installed on the top of the classroom directly through a boom and the lens on the projector is directly exposed to the air. The dustproof effect of the lens is extremely poor. Dust will adhere to the lens, reducing the projection effect and teaching quality, and maintenance personnel are required to clean the dust on the lens. During specific operations, the maintenance personnel judge the amount of dust accumulated on the lens according to the projection quality. When the quality is poor, maintenance personnel use climbing equipment to climb up and use lens paper to wipe the lens. The cleaning process is very troublesome. At the same time, the frequency of cleaning is high, which increases the workload of maintenance personnel. Therefore, it is urgent to design a food nutrition meal teaching device

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