CN-121370038-B - Jet saliva suction mouth mirror

CN121370038BCN 121370038 BCN121370038 BCN 121370038BCN-121370038-B

Abstract

The invention relates to the technical field of medical equipment, and discloses an air-jet saliva-sucking stomatoscope which comprises a lens seat, a handle, an air-jet mechanism, an air suction hole and a saliva suction hole. The lens seat is internally provided with a negative pressure cavity, the upper part of the lens seat is provided with a lens, the handle is detachably connected with the lens seat, and the inside of the handle is provided with an air blowing pipeline and a negative pressure pipeline. The air injection mechanism is arranged on the side of the lens seat near the handle and comprises a semi-annular cavity, an output gap, a baffle plate and a micro-convex array, and can generate a composite inclined air curtain of-15 DEG to 0 DEG, which covers the surface of the lens. The saliva sucking holes are arranged on the circumferential side surface of the lens seat, are internally provided with flexible one-way valves, and the fluid resistance of the saliva sucking channel is far greater than that of the air sucking channel. According to the invention, the air curtain is formed on the surface of the lens and is recycled efficiently, so that the fog and pollution of the lens are effectively prevented, the outward airflow stimulation is reduced, and the visual field definition, the operation efficiency and the comfort level of a patient are remarkably improved.

Inventors

LIANG LI
YANG NAN
LIU ZHEN
JIANG HAO
GAO HUI
WANG CHEN

Assignees

中国人民解放军总医院第八医学中心

Dates

Publication Date: 20260512
Application Date: 20251106

Claims (9)

1. An air jet saliva suction mouth mirror, comprising: a lens seat, the upper part of which is provided with a lens, a negative pressure cavity is arranged in the inner part; the handle is detachably connected with the lens seat; the air injection mechanism is arranged on the inner side wall of the lens seat close to the handle and used for generating an inclined air curtain for covering the surface of the lens; A plurality of air suction holes arranged on the opposite surface of the air injection mechanism, the air suction holes being directly communicated with the negative pressure cavity, and The saliva sucking holes are formed in the circumferential side face of the lens seat, are connected with the negative pressure cavity, and are internally provided with flexible one-way valves; The saliva suction channel formed by the saliva suction holes has larger fluid resistance than the air suction channel formed by the air suction holes, and the handle is internally provided with an air blowing pipeline and a negative pressure pipeline which are respectively connected to the air blowing mechanism and the negative pressure cavity; The flexible one-way valve is of an umbrella-shaped valve structure, is adsorbed and closed by negative pressure in an initial state and seals the saliva suction hole, the opening pressure threshold value of the flexible one-way valve is configured to be-80 to-110 kPa, when the saliva suction hole is blocked by liquid or the air suction hole is blocked to cause the flow of the system to be reduced, the negative pressure value in the negative pressure cavity is increased, and when the opening pressure threshold value is reached, the flexible one-way valve is opened.
2. An air jet saliva suction mouth mirror as defined in claim 1, wherein the air jet mechanism comprises: the semi-annular cavity is communicated with the air blowing pipeline; The output gap is formed in one side of the semi-annular cavity, which faces the lens; A partition board arranged in the semi-annular cavity to divide the semi-annular cavity into an upper cavity and a lower cavity, and The micro-convex array is arranged on the lower surface of the partition plate and is composed of a plurality of micro-protrusions which are regularly arranged; Wherein the partition plate and the micro-convex array are jointly configured to divide the air flow into an upper layer horizontal air flow and a lower layer inclined air flow, and the injection angle of the lower layer inclined air flow is-15 degrees to 0 degrees.
3. The jet saliva suction mouth mirror as recited in claim 2, wherein the micro-protrusions are one or more of cylinders, truncated cones or wedge prisms.
4. The jet saliva suction mouth mirror as defined in claim 1, wherein the saliva suction hole has an arc-shaped channel structure, the outer end opening and the inner end opening are both inclined downward, and the highest point of the channel is higher than the openings at both ends.
5. An air jet saliva suction mouth mirror as defined in claim 1, wherein the flexible one-way valve is made of medical silicone.
6. The jet saliva suction mouth mirror as defined in claim 2, wherein the output slit of the jet mechanism is semi-circular, the suction holes are correspondingly distributed along the semi-circle, and a surrounding flow field structure with one side jet and one side suction is formed on the periphery of the lens.
7. An air jet saliva suction mouth mirror as defined in claim 1, wherein the total effective cross-sectional flow area of the suction holes is greater than the total effective cross-sectional flow area of the saliva suction holes.
8. An air jet saliva suction mouth mirror as defined in claim 2, wherein the height of the output slit is consistent with the height of the semi-annular cavity interior.
9. A method of using a jet saliva suction mouth mirror according to any one of claims 1-8, comprising the steps of: supplying gas to the gas spraying mechanism through the gas blowing pipeline to form a gas curtain barrier on the surface of the lens; Sucking air curtain gas through the negative pressure pipeline and the air suction hole to enable the air flow to form a circulation loop around the lens; when the saliva suction hole is blocked or the flow of the saliva suction hole is reduced, the negative pressure of the system is increased, so that the flexible one-way valve is opened, and saliva suction operation is performed; When the saliva suction is completed and the suction flow is recovered, the flexible one-way valve is automatically closed, and the system recovers an air curtain circulation mode.

Description

Jet saliva suction mouth mirror Technical Field The invention relates to the technical field of medical equipment, in particular to an air-jet saliva-sucking stomatoscope. Background In the process of oral examination and treatment, medical workers often use stomatoscope to observe the condition of the oral cavity of a patient, thereby assisting diagnosis and operation. The stomatoscope is used as a basic diagnostic instrument and is widely applied to clinical examination of various oral diseases. Conventional mouth mirrors are typically composed of a handle and a tilting lens provided at one end thereof. However, in the treatment process, saliva generated in the oral cavity of a patient, high humidity environment formed by exhalation, and scraps and water mist generated during dental drilling and grinding are easy to cause fog or pollution on the surface of the lens, which hinders the clear vision of doctors. In order to solve this problem, stomatoscope having air injection and saliva suction functions has appeared in the market. The device is provided with an air flow jet opening facing the lens at the end part of the handle, can remove mirror mist and liquid drops and fragments attached to the mirror mist through air injection, and is also provided with a saliva suction opening at the end part, wherein the saliva suction opening is connected with a waterway and a circuit system of an external dental chair through an internal connecting pipe, and saliva is sucked through negative pressure. However, although the saliva suction port can suck part of the air flow, more air still enters into the deep part of the oral cavity, so that the throat and soft palate area are stimulated, and reflective reactions such as cough or nausea of a patient are easily caused. Therefore, it is necessary to provide an air-jet saliva-sucking mouth mirror to solve the above technical problems. Disclosure of Invention The invention overcomes the defects of the prior art and provides the jet saliva suction stomatoscope. In order to achieve the purpose, the invention adopts the technical scheme that the jet saliva suction stomatoscope comprises: a lens seat, the upper part of which is provided with a lens, a negative pressure cavity is arranged in the inner part; the handle is detachably connected with the lens seat; the air injection mechanism is arranged on the inner side wall of the lens seat close to the handle and used for generating an inclined air curtain for covering the surface of the lens; A plurality of air suction holes arranged on the opposite surface of the air injection mechanism, the air suction holes being directly communicated with the negative pressure cavity, and The saliva sucking holes are formed in the circumferential side face of the lens seat, are connected with the negative pressure cavity, and are internally provided with flexible one-way valves; wherein the fluid resistance of the saliva suction channel formed by the plurality of saliva suction holes is larger than that of the air suction channel formed by the plurality of the air suction holes; The inside of the handle is provided with an air blowing pipeline and a negative pressure pipeline which are respectively connected to the air blowing mechanism and the negative pressure cavity. In a preferred embodiment of the present invention, the air injection mechanism comprises: the semi-annular cavity is communicated with the air blowing pipeline; The output gap is formed in one side of the semi-annular cavity, which faces the lens; A partition board arranged in the semi-annular cavity to divide the semi-annular cavity into an upper cavity and a lower cavity, and The micro-convex array is arranged on the lower surface of the partition plate and is composed of a plurality of micro-protrusions which are regularly arranged; Wherein the partition plate and the micro-convex array are jointly configured to divide the air flow into an upper layer horizontal air flow and a lower layer inclined air flow, and the injection angle of the lower layer inclined air flow is-15 degrees to 0 degrees. In a preferred embodiment of the present invention, the micro-protrusions are in the shape of one or more of a cylinder, truncated cone, or wedge prism. In a preferred embodiment of the present invention, the saliva suction hole has an arc-shaped channel, the outer end opening and the inner end opening are both inclined downward, and the highest point of the channel is higher than the openings at both ends. In a preferred embodiment of the invention, the flexible one-way valve is an umbrella-shaped valve structure, is made of medical silica gel, is adsorbed and closed by negative pressure in an initial state and seals the saliva suction hole, and the opening pressure threshold is configured to be-80 to-110 kPa. In a preferred embodiment of the invention, when the saliva suction hole is blocked by liquid or the air suction hole is blocked, so that the system flow is reduced, the