Field lens dustproof mechanism

Abstract

The utility model provides a dustproof mechanism of a field lens, which comprises a lens body, an output end of the lens body is provided with an emergent mirror surface; the output end of the lens body is sleeved with the dustproof outer cover, the emergent mirror surface is located between the dustproof outer cover and the lens body, an inner cavity is formed by the emergent mirror surface and the dustproof outer cover, an air inlet hole is formed in the outer wall of the dustproof outer cover, a through opening is formed in the middle of the dustproof outer cover, and the outer edge, facing the emergent mirror surface, of the opening extends to form a protruding structure; the bottom of the protruding structure abuts against or is close to the emergent mirror face, and an airflow gap exists between the bottom of the protruding structure and the emergent mirror face so that it can be guaranteed that airflow in the inner cavity faces the opening. The working stability of the laser equipment can be effectively improved, the service life of the laser lens, namely the lens body, is prolonged, the problems of dust light blocking, lens pollution and the like existing in the operation of the laser processing equipment are solved with relatively low cost, the emergent mirror surface of the laser lens can be kept in a clean state, and pollutants of the laser lens can be cleaned in time.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to a dustproof mechanism for field lenses. Background Technology

[0002] Most field lenses in laser processing systems currently on the market do not have a mirror dust prevention system, or they use high-speed air knives for mirror dust removal. However, using high-speed air knives for dust prevention has the following drawbacks:

[0003] 1. Large airflow and high velocity can easily cause the Venturi effect. The Venturi effect causes low-pressure adsorption on the mirror surface, which causes dust particles in the air to be adsorbed on the mirror surface and cannot be removed, thus affecting the laser output effect.

[0004] 2. High-speed, high-pressure airflow causes significant losses of compressed air, resulting in an increased demand for compressed air resources for the entire machine. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a field lens dustproof mechanism, which can effectively improve the working stability of laser equipment, extend the service life of the laser lens (i.e., the lens body), and solve the problems of dust blocking light and lens contamination in the operation of laser processing equipment at a relatively low cost. It can keep the laser lens output mirror surface clean and clean laser lens contaminants in a timely manner. It has a simple structure, stable function, is easy to maintain, and consumes few resources.

[0006] The embodiments of this utility model are achieved through the following technical solutions:

[0007] A field lens dustproof mechanism, comprising:

[0008] The lens body has an output mirror at its output end.

[0009] A dustproof cover is fitted onto the output end of the lens body. The exiting lens is located between the dustproof cover and the lens body, and the exiting lens and the dustproof cover form an inner cavity. The outer wall of the dustproof cover is provided with several air inlets communicating with the inner cavity. A through opening is provided in the middle of the dustproof cover. A protruding structure extends from the outer edge of the opening toward the exiting lens. The bottom of the protruding structure abuts against or is close to the exiting lens, and there is an airflow gap between the bottom of the protruding structure and the exiting lens to ensure that the airflow of the inner cavity is directed toward the opening.

[0010] According to a preferred embodiment, the bottom wall of the protruding structure is provided with a plurality of protrusions, and there is a gap between two adjacent protrusions.

[0011] According to a preferred embodiment, the dustproof cover is polygonal in shape, and the plurality of air inlets are evenly distributed.

[0012] According to a preferred embodiment, the dustproof cover is prismatic in shape, and a plurality of air inlets are disposed opposite to each other on the outer wall of the dustproof cover.

[0013] According to a preferred embodiment, the sidewall of the protrusion structure away from the opening is provided with an inclined surface, and the inclined surface is inclined downward.

[0014] According to a preferred embodiment, a seal is provided between the dust cover and the lens body.

[0015] According to a preferred embodiment, each of the air inlets is connected to a regulating valve.

[0016] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0017] This invention effectively improves the working stability of laser equipment, extends the service life of the laser lens (i.e., the lens body), and solves problems such as dust blocking light and lens contamination in the operation of laser processing equipment at a relatively low cost. It can keep the laser lens output mirror surface clean and can clean laser lens contaminants in a timely manner. It has many advantages such as simple structure, stable function, easy maintenance, and low resource consumption. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A cross-sectional structural schematic diagram of a field lens dustproof mechanism provided for an embodiment of this utility model;

[0020] Figure 2 A three-dimensional structural schematic diagram of a field lens dustproof mechanism provided for an embodiment of this utility model;

[0021] Figure 3 A top view of a dustproof mechanism for a field lens provided in an embodiment of this utility model;

[0022] Figure 4 for Figure 1 A schematic diagram of a partial cross-sectional structure.

[0023] Icons: 1. Dustproof cover; 2. Adjustment valve; 3. Lens body; 301. Exit lens; 302. Inner cavity; 303. Opening; 304. Protruding structure; 4. Seal; 5. Inclined surface; 6. Air inlet; 7. Protrusion. Detailed Implementation

[0024] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0025] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0027] Example

[0028] Please refer to Figures 1 to 4 A field lens dustproof mechanism includes: a lens body 3, the output end of which is provided with an exiting mirror 301; a dustproof cover 1, which is fitted onto the output end of the lens body 3, the exiting mirror 301 is located between the dustproof cover 1 and the lens body 3, and the exiting mirror 301 and the dustproof cover 1 form an inner cavity 302, the outer wall of the dustproof cover 1 is provided with a plurality of air inlets 6 communicating with the inner cavity 302, the middle part of the dustproof cover 1 is provided with a through opening 303, and a protruding structure 304 extends from the outer edge of the opening 303 toward the exiting mirror 301, the bottom of the protruding structure 304 abuts against or is close to the exiting mirror 301 and there is an airflow gap between the bottom of the protruding structure 304 and the exiting mirror 301, so as to ensure that the airflow of the inner cavity 302 is directed toward the opening 303.

[0029] Preferably, the bottom wall of the protruding structure 304 is provided with a plurality of protrusions 7, and there is a gap between two adjacent protrusions 7.

[0030] Preferably, the dust cover 1 is polygonal in shape, with multiple air inlets evenly distributed.

[0031] Preferably, the dust cover 1 is prismatic in shape, and multiple air inlets 6 are arranged opposite each other on the outer wall of the dust cover 1.

[0032] Preferably, the sidewall of the protruding structure 304 away from the opening 303 is provided with an inclined surface 5, and the inclined surface 5 is inclined downward.

[0033] Preferably, a sealing element 4 is provided between the dustproof outer cover and the lens body 3.

[0034] Preferably, each of the several air inlets 6 is connected to a regulating valve 2.

[0035] The working principle of this utility model:

[0036] In this embodiment, a sealing element 4 is provided between the lens body 3 and the dust cover 1. The sealing element 4 can be selected with a rubber gasket and a top screw to ensure the sealing between the lens body 3 and the dust cover 1, and to prevent gas leakage or contaminants from entering the cavity between the lens body 3 and the dust cover 1. The air inlet 6 or the regulating valve 2 are externally connected to an air supply unit such as an air pump. The air supply unit can provide an air source. The air supply unit injects high-pressure gas or airflow into the inner cavity 302 through the air inlet 6. The high-pressure gas or airflow in the inner cavity 302 flows out through the airflow gap and is finally output at the opening 303. The arrow direction indicates the flow method of high-pressure gas or airflow. Since the airflow gap is formed between the protruding structure 304 and the exit mirror surface 301, the flow of high-pressure gas or airflow will perform dust removal treatment on the exit mirror surface 301. The high-pressure gas or airflow in the inner cavity 302 flows through the airflow gap to the opening 303 and is output upward, forming a local clean air mass, blocking external dust and ensuring that the exit mirror surface 301 is not contaminated. In this embodiment, the regulating valve 2 can be selected to facilitate control of the pressure of the high-pressure gas or airflow entering the inner cavity 302. In this embodiment, the dustproof cover 1 is octagonal in shape but not limited to an octagonal structure; a hexagonal structure, a decagonal structure, etc., can be selected. The outer wall of the dustproof cover 1 is provided with air inlets 6 and regulating valves 2 on six sides symmetrical about the center. Every pair of air inlets 6 or regulating valves 2 is symmetrical about the center to ensure that the air pressure is the same at each position, so that the airflow in each inner cavity 302 converges to the center of the opening 303 after passing through the airflow gap, and finally flows outward (then attached). Figure 1The output is oriented upwards (center to top) to prevent dust from entering through opening 303 (preventing dust from entering the airflow gap from top to bottom). Multiple air inlets 6 or regulating valves 2 are not limited to symmetrical arrangement about the center of the dustproof cover 1; they can be staggered or irregularly arranged. The airflow gap can be adjusted according to the airflow size. In this embodiment, high-pressure gas or airflow can be buffered through the inner cavity 302 before flowing from the airflow gap to opening 303, preventing high airflow and high velocity from causing low-pressure adsorption on the mirror surface, resulting in dust particles in the air adsorbing onto the exit mirror surface 301 and being unable to be removed. This avoids the high-pressure airflow of the high-speed air knife causing localized chaos in the internal flow field, which could easily affect the dust removal effect of the original dust removal mechanism in the processing equipment. In this embodiment, the internal flow field is stable, and the dust removal effect is good. In this embodiment, "upper," "lower," "left," and "right" refer to... Figure 1 The direction in the figure is used as an example reference. In this embodiment, the protruding structure 304 is inclined with a wider top and a narrower bottom. Therefore, the angle formed between the side wall of the protruding structure 304 near the inner cavity 302 and the exiting mirror surface 301 is any angle between 0 and 90 degrees. In this embodiment, the side wall of the protruding structure 304 away from the opening 303 is inclined, and the inclination angle of this side wall can be selected as any angle between 0 and 90 degrees, as shown in the attached figure. Figure 1 The opening 303 is tilted downwards, guiding the airflow entering the inner cavity 302 towards the airflow gap, causing the airflow to exit towards the airflow gap, thus ultimately causing the airflow to exit at the outlet. In this embodiment, the opening 303 is rectangular, but it can also be square, circular, hexagonal, polygonal, or irregularly shaped. Furthermore, multiple protrusions 7 can be provided, with airflow gaps formed between adjacent protrusions 7, enabling multiple airflow gaps to output to the opening 303. Figure 4 The middle arrow B indicates the path of the airflow after it enters the inner cavity 302.

[0037] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A dust-proof mechanism for a field lens, characterized by comprising: The utility model relates to a field lens dustproof mechanism, including: Lens body, the output of lens body is provided with exit mirror surface; Dust cover, the dust cover is sleeved on the output of lens body, the exit mirror surface is located between dust cover and lens body, and the exit mirror surface and dust cover form inner chamber, the outer wall of dust cover is provided with a plurality of gas inlet holes that communicate with the inner chamber, the middle part of dust cover is provided with the opening that passes through, the outer edge of opening extends the convex structure to the direction of exit mirror surface, the bottom of convex structure abuts or is close to exit mirror surface and the bottom of convex structure and exit mirror surface exist air flow gap, guarantee the air flow of inner chamber to opening.

2. The field lens dustproof mechanism according to claim 1, wherein, The bottom wall of the convex structure is provided with a plurality of protrusions, and a gap exists between adjacent two protrusions.

3. The field lens dustproof mechanism according to claim 1, wherein, The dust cover is polygonal, and the plurality of gas inlet holes are uniformly distributed.

4. The field lens dustproof mechanism according to claim 1, wherein, The dust cover is prismatic, and the plurality of gas inlet holes are oppositely arranged on the outer wall of the dust cover.

5. The field lens dustproof mechanism according to claim 1, wherein, The side wall of the convex structure away from the opening is provided with an inclined surface, and the inclined surface is arranged downwardly.

6. The field lens dustproof mechanism according to claim 1, wherein, A sealing member is arranged between the dust cover and the lens body.

7. The field lens dustproof mechanism according to claim 1, wherein, The plurality of gas inlet holes are connected with adjusting valves.

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