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A cylinder device and gas circuit system for non-contact tonometer

A technology of cylinder device and gas circuit system, which is applied in the direction of tonometer, etc., and can solve the problem that the position of the piston is not easy to determine

Active Publication Date: 2022-07-26
湖南卡睿知医疗科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the present invention solves the defect that the piston position in the non-contact tonometer is not easy to determine in the prior art, thereby providing a cylinder device and an air circuit system for the non-contact tonometer

Method used

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  • A cylinder device and gas circuit system for non-contact tonometer
  • A cylinder device and gas circuit system for non-contact tonometer
  • A cylinder device and gas circuit system for non-contact tonometer

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Embodiment 1

[0038] refer to Figure 1-4 , a cylinder device for a non-contact tonometer provided by the present invention includes a cylinder 1 with a chamber and a piston that can reciprocate in the chamber, and the cylinder 1 is located at the end of the movement stroke of the piston A first through hole 2 connecting the chamber and the outside air is opened; a sealing device is provided on the cylinder 1 and is suitable for closing or opening the first through hole 2 .

[0039] Through the above settings, when the cylinder 1 performs the air injection action, the piston starts to start, and the first through hole 2 on the cylinder 1 is in a closed state at the same time. After the piston reaches the preset position, the sealing device opens the first through hole 2 at this time. Excessive gas caused by inertia is discharged through the first through hole 2; when the piston returns to the initial position, the first through hole 2 is always in an open state, so that the outside air will...

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PUM

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Abstract

The present invention relates to the technical field of non-contact tonometers, in particular to a cylinder device and an air circuit system for non-contact tonometers, comprising a cylinder with a chamber and a piston reciprocating in the chamber, and a cylinder on the cylinder A first through hole is opened at the end of the movement stroke of the piston to communicate with the chamber and the outside air; a sealing device is arranged on the cylinder and is suitable for closing or opening the first through hole. The invention can solve the defect that the position of the piston in the non-contact tonometer in the prior art is not easy to determine.

Description

technical field [0001] The invention relates to the technical field of non-contact tonometer, in particular to a cylinder device and an air circuit system for a non-contact tonometer. Background technique [0002] Tonometers have been widely used in the measurement of intraocular pressure in human eyes. By measuring intraocular pressure, it can provide reference for the diagnosis and treatment of glaucoma and related ophthalmic diseases. The tonometer is made according to the Imbert-Fick principle. The principle is to obtain the intraocular pressure by calculating the pressure exerted on the cornea divided by the contact area. The non-contact tonometer uses air pressure to flatten a certain area of ​​the cornea in a non-contact way, and calculates the intraocular pressure by recording the changes in the photoelectric signal during the corneal flattening process. The non-contact tonometer improves the comfort of intraocular pressure measurement by avoiding the contact betwe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/16
CPCA61B3/165
Inventor 解洪升夏明亮唐海军
Owner 湖南卡睿知医疗科技有限公司
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