Protective eyewear field of view detector and method

Abstract

The application provides a protective eyeshield field of view detector and a method thereof. The detector comprises a head model, a head model positioning device and a laser emitter. The head model is installed on the head model positioning device. The head model has two eye pupils each having a pupil positioning point. The head model positioning device comprises a support, a horizontal shaft, a swing seat, a rotating disc and a support seat. The swing seat is rotatably connected to the support through the horizontal shaft. The swing seat is provided with a first protractor for measuring the rotation angle of the swing seat. The horizontal shaft is horizontally through the two pupil positioning points. The rotating disc is rotatably installed on the swing seat. The rotating disc is provided with a second protractor for measuring the rotation angle of the rotating disc. The support seat is installed on the rotating disc. The head model is installed on the support seat. The laser emitter is arranged in front of the head model. The detector and the method thereof are convenient for field of view detection of protective eyeshields and masks. The detection data can be directly obtained, and the detection sample can be quickly judged.

Description

Technical Field

[0001] This invention relates to the field of visual field testing technology, specifically to a visual field testing instrument and method for protective eye shields. Background Technology

[0002] Medical protective goggles and face shields are disposable medical supplies used to prevent direct splashes of blood, bodily fluids, and secretions into the eyes and face, thus preventing infection. However, wearing goggles and face shields can affect a person's field of vision. Field of vision refers to the spatial range that a person can see when looking at an object directly in front of them with their head and eyeballs fixed. A better field of vision makes it easier to observe the surrounding situation and improves safety during work. Therefore, testing the field of vision of goggles and face shields is an essential process in determining whether a product is qualified. Please refer to [link / reference]. Figure 1 and Figure 2 The standard for passing the inspection of medical protective goggles and face shields is that, in the wearing position, the horizontal visual field angle (∠1, ∠2) of each eye in the temporal direction should not be less than 50°, the horizontal visual field angle (∠3, ∠4) in the nasal direction should not be less than 30°, and the vertical visual field angle (∠5, ∠6) in both the upper and lower directions of the line of sight should not be less than 30°. Therefore, there is an urgent need to design a visual field testing device for medical protective goggles and face shields. Summary of the Invention

[0003] In view of the above, the present invention provides a protective goggles and face shield field of view testing instrument and method, so as to facilitate field of view testing of protective goggles and face shields, intuitively obtain test data, and facilitate rapid judgment of whether the sample to be tested is qualified.

[0004] The technical solution of this invention:

[0005] This invention provides a protective eye mask field of view testing device, including a head model, a head model positioning device, and a laser emitter. The head model is mounted on the head model positioning device, and both eyes of the head model have pupil positioning points. The head model positioning device includes a bracket, a horizontal axis, a swing seat, a turntable, and a support base. The swing seat is rotatably connected to the bracket via the horizontal axis. The swing seat is equipped with a first protractor for measuring the rotation angle of the swing seat. The axis of the horizontal axis passes horizontally through the two pupil positioning points. The turntable is rotatably mounted on the swing seat, and the turntable is equipped with a second protractor for measuring the rotation angle of the turntable. The axis of the turntable intersects perpendicularly with the axis of the horizontal axis at one pupil positioning point. The support base is mounted on the turntable. The head model is mounted on the support base with its position adjustable left and right along the horizontal axis. The laser emitter is positioned directly in front of the head model to emit a laser beam that is horizontally and directly aimed at one pupil positioning point of the head model. By adjusting the position of the head model along the horizontal axis, the laser beam can be horizontally and directly aimed at the other pupil positioning point.

[0006] Furthermore, the swing seat includes two end plates, a guide rod connected between the bottom ends of the two end plates, and a support seat mounted on the guide rod. The support seat is fixed to the two guide rods in an adjustable manner along the guide rods. The top ends of the two end plates are rotatably connected to the bracket via a horizontal shaft, and the turntable is rotatably mounted on the support seat.

[0007] Furthermore, the top of the end plate is a fan-shaped portion, and the first protractor includes a first angle scale on the fan-shaped portion and a first pointer on the bracket for indicating the corresponding first angle scale after the swing seat rotates. When the swing seat is in the initial position, the first pointer points to the zero value of the first angle scale.

[0008] Furthermore, the fan-shaped portion of the end plate is provided with an arc-shaped groove, and a detachable locking element is provided in the arc-shaped groove to lock the swing seat onto the bracket when the turntable rotates.

[0009] Furthermore, the second protractor includes a second angle scale on the upper surface of the turntable, and a second pointer mounted on the swing base to indicate the corresponding second angle scale after the turntable rotates. When the head mold is in the initial position, the second pointer points to the zero value of the second angle scale.

[0010] Furthermore, the support base includes a lower connecting block, a support rod, and an upper connecting block. The lower connecting block is fixed on the turntable and has a first adjustment groove. The bottom end of the support rod is adjustablely installed in the first adjustment groove. The upper connecting block is fixed to the top end of the support rod and has a second adjustment groove. The head mold is adjustablely installed in the second adjustment groove to switch the laser beam direct point between two pupil positioning points.

[0011] Furthermore, it also includes a base plate and a support column, with the support column and two brackets fixed to the base plate in an isosceles triangle shape, and the laser emitter mounted on the support column.

[0012] The present invention also provides a method for using the above-described protective eye mask field of view measuring instrument, comprising the following steps:

[0013] The sample to be tested is worn on the head mold. When the head mold is in the initial position, the head mold faces the laser emitter. The laser beam emitted by the laser emitter passes through the sample to be tested and shines horizontally on a pupil positioning point of the head mold. The turntable is rotated clockwise, which causes the head mold to rotate clockwise until the laser beam is blocked by the sample to be tested and cannot shine on the pupil positioning point. The first angle of the turntable rotation is read by the second protractor. The first angle is the temporal horizontal visual field angle.

[0014] Rotate the turntable counterclockwise back to the initial position of the head model and continue rotating until the laser beam is blocked by the sample to be tested and cannot illuminate the pupil positioning point. The second angle of the turntable's counterclockwise rotation from the initial position of the head model is read by the second protractor. The second angle is the horizontal field of view angle on the nasal side.

[0015] Further, rotate the turntable clockwise to return to the initial position of the head mold. When the swing seat is in the initial position, the reading of the first protractor is zero. Rotate the swing seat clockwise around the horizontal axis to drive the head mold to rotate accordingly until the laser beam is blocked by the sample to be tested and cannot irradiate the pupil positioning point. Read the third angle of the swing seat's rotation around the horizontal axis through the first protractor. The third angle is the vertical upward field of view angle.

[0016] Rotate the swing seat counterclockwise to return to the initial position and continue rotating until the laser beam is blocked by the sample to be tested and cannot illuminate the pupil positioning point. Read the fourth angle of the swing seat's rotation around the horizontal axis from its initial position through the first protractor. The fourth angle is the downward field of view angle in the vertical direction.

[0017] Through the above steps, the visual field angles corresponding to one eye are detected. By adjusting the position of the head model on the support, the laser beam emitted by the laser emitter passes through the sample under test and shines horizontally on the other pupil positioning point of the head model. The visual field angles of the other eye are measured according to the corresponding steps described above.

[0018] Furthermore, the following calibration steps are included before fitting the sample to be tested onto the head mold:

[0019] With the head model facing the laser emitter, adjust the left and right positions of the head model so that the laser beam is horizontally and directly aimed at a pupil positioning point;

[0020] The head mold is rotated 90° and locked by a turntable;

[0021] Adjust the position of the head mold by using the support base so that the laser beam is horizontally and directly directed from one side of the head mold to the pupil positioning point;

[0022] Rotate the head model 90° in the opposite direction so that it faces the laser emitter;

[0023] By rotating the head model 45° clockwise and counterclockwise using the swing seat, observe whether the laser point remains at the pupil positioning point.

[0024] Return the head model to face the laser emitter, and then wear the sample to be tested for inspection.

[0025] The beneficial effects of this invention are:

[0026] This invention relates to a protective eye and face mask visual field testing instrument. It comprises a head mold, a head mold positioning device, and a laser emitter. The head mold positioning device consists of a bracket, a horizontal axis, a swing seat, a turntable, and a support base. The sample to be tested (eye mask or face mask) is placed on the head mold. Rotating the turntable causes the head mold to rotate until the laser beam is blocked by the sample and cannot illuminate the pupil positioning point. A second protractor reads the temporal and nasal horizontal visual field angles. Then, rotating the turntable causes the head mold to rotate accordingly until the laser beam is blocked by the sample and cannot illuminate the pupil positioning point. A first protractor reads the vertical upward and downward visual field angles. This allows for the detection of the visual field angles for one eye. By adjusting the position of the head mold on the support base, the laser beam emitted by the laser emitter can pass through the sample and directly illuminate the other pupil positioning point of the head mold. The visual field angles for the other eye are then measured following the same steps. In this way, by simply rotating the turntable and swinging base, the visual field angles of each eye can be read through the first and second protractors, respectively. The test data can be obtained intuitively, which is conducive to quickly determining whether the sample to be tested is qualified and facilitates the visual field test of protective goggles and face shields.

[0027] The preferred embodiments of the present invention and their beneficial effects will be further described in detail with reference to specific implementation methods. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but should not be construed as limiting the invention. In the drawings,

[0029] Figure 1 A top-down view of the horizontal field of vision of a head model wearing a blindfold;

[0030] Figure 2 This is a side view diagram of the head model from the vertical field of vision angle;

[0031] Figure 3 This is a perspective view of the protective eye mask field of view measuring instrument of the present invention;

[0032] Figure 4 This is a front view of the protective eye mask field of view measuring instrument of the present invention;

[0033] Figure 5 for Figure 4 The left view;

[0034] Figure 6 for Figure 4 Top view;

[0035] Figure 7This is a diagram illustrating the usage of the protective eye mask field of view detector of the present invention in detecting the field of view angle in the horizontal direction.

[0036] Figure 8 This is a diagram showing the usage of the protective eye mask field of view detector of the present invention in detecting the field of view angle in the vertical direction.

[0037] The reference numerals in the attached diagrams are as follows: Head mold 1, Head mold positioning device 2, Laser emitter 3, Bracket 21, Horizontal axis 22, Swing seat 23, Turntable 24, Support seat 25, First protractor 26, Second protractor 27, End plate 231, Guide rod 232, Bearing seat 233, First angle scale 261, First pointer 262, Arc groove 234, Locking piece 235, Second angle scale 271, Second pointer 272, Lower connecting block 251, Support rod 252, Upper connecting block 253, Base plate 4, Column 5. Detailed Implementation

[0038] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0039] Please see Figures 3 to 6 This invention provides a protective eye mask field of view testing instrument, including a head mold 1, a head mold positioning device 2, and a laser emitter 3. The head mold 1 is mounted on the head mold positioning device 2, and both eyes of the head mold 1 have pupil positioning points. The head mold positioning device 2 includes a bracket 21, a horizontal shaft 22, a swing seat 23, a turntable 24, and a support base 25. The swing seat 23 is rotatably connected to the bracket 21 via the horizontal shaft 22. The swing seat 23 is provided with a first protractor 26 for measuring the rotation angle of the swing seat 23. The axis of the horizontal shaft 22 horizontally passes through the two pupil positioning points. The turntable 24 is rotatably mounted on the swing seat 23. The turntable 24 is provided with a second protractor 27 for measuring the rotation angle of the turntable 24. The axis of the turntable 24 intersects the axis of the horizontal shaft 22 perpendicularly at one pupil positioning point. The support base 25 is mounted on the turntable 24. The head mold 1 is mounted on the support base 25 with its position adjustable left and right along the horizontal shaft 22. The laser emitter 3 is positioned directly in front of the head mold 1 to emit a laser beam that is horizontally directed at one pupil positioning point of the head mold 1. The position of the head mold 1 is adjusted axially along the horizontal axis 22 so that the laser beam is horizontally directed at the other pupil positioning point.

[0040] The present invention relates to a protective eye mask field of view measuring instrument, which consists of a head mold 1, a head mold positioning device 2, and a laser emitter 3 working together. The head mold positioning device 2 is configured with a bracket 21, a horizontal axis 22, a swing seat 23, a turntable 24, and a support base 25. Please refer to the relevant documentation. Figure 7 and Figure 8The sample to be tested (eye mask or face mask) is placed on head mold 1. When head mold 1 is in its initial position, it faces laser emitter 3. The laser beam emitted by laser emitter 3 passes through the sample to directly illuminate a pupil positioning point on head mold 1. Rotating turntable 24 clockwise causes head mold 1 to rotate clockwise until the laser beam is blocked by the sample and cannot illuminate the pupil positioning point. The first angle of rotation of turntable 24 is read using second protractor 27; this first angle is the temporal horizontal visual field angle ∠1. Then, turntable 24 is rotated counterclockwise back to the initial position of head mold 1 and continues to rotate until the laser beam is blocked by the sample and cannot illuminate the pupil positioning point. The second angle of counterclockwise rotation of turntable 24 from the initial position of head mold 1 is read using second protractor 27; this second angle is the nasal horizontal visual field angle ∠3. Rotate turntable 24 clockwise to return head model 1 to its initial position. When swing base 23 is in its initial position, the reading of the first protractor 26 is zero. Rotate swing base 23 clockwise around horizontal axis 22, causing head model 1 to rotate accordingly, until the laser beam is blocked by the sample to be tested and cannot illuminate the pupil positioning point. Read the third angle of the rotation of swing base 23 around horizontal axis 22 through the first protractor 26. The third angle is the vertical upward visual field angle ∠5. Then, rotate swing base 23 counterclockwise to return to the initial position and continue to rotate until the laser beam is blocked by the sample to be tested and cannot illuminate the pupil positioning point. Read the fourth angle of the rotation of swing base 23 from its initial position around horizontal axis 22 through the first protractor 26. The fourth angle is the vertical downward visual field angle ∠6. In this way, the visual field angles corresponding to one eye are detected. By adjusting the position of the head mold 1 on the support base 25, the laser beam emitted by the laser emitter 3 passes through the sample under test and shines horizontally onto the other pupil positioning point of the head mold 1. The visual field angles of the other eye are then measured according to the corresponding steps described above. In this way, by simply rotating the turntable 24 and the swing base 23, the visual field angles of each eye can be read out through the first protractor 26 and the second protractor 27, respectively. The test data can be obtained intuitively, which is conducive to quickly determining whether the sample under test is qualified and facilitates the visual field inspection of protective goggles and face shields.

[0041] In this embodiment, the swing seat 23 includes two end plates 231, two guide rods 232 connected between the bottom ends of the two end plates 231, and a support seat 233 mounted on the two guide rods 232. The support seat 233 is fixed to the two guide rods 232 in an adjustable position. The top ends of the two end plates 231 are rotatably connected to the bracket 21 via a horizontal shaft 22, and the turntable 24 is rotatably mounted on the support seat 233. This design is simple in structure and easy to manufacture, facilitating both rotatable connection with the bracket 21 and rotatable connection with the turntable 24. The top end of each end plate 231 is a fan-shaped portion. Please refer to [reference needed]. Figure 5The first protractor 26 includes a first angle scale 261 on the sector-shaped portion and a first pointer 262 on the bracket 21 for indicating the first angle scale 261 corresponding to the rotation of the swing seat 23. When the swing seat 23 is in its initial position, the first pointer 262 points to the zero mark of the first angle scale 261. After rotating the swing seat 23 in both directions, the rotation angle of the swing seat 23 can be obtained directly from the degree corresponding to the first angle scale 261 indicated by the first pointer 262. Preferably, each end plate 231 has an arc-shaped groove 234 in its sector-shaped portion, and a detachable locking member 235 is provided in the arc-shaped groove 234 to lock the swing seat 23 onto the bracket 21 when the turntable 24 rotates, so as to avoid the rotation of the swing seat 23 affecting the rotation of the turntable 24 and improve the accuracy of the detection.

[0042] Please see Figure 6 In this embodiment, the second protractor 27 includes a second angle scale 271 disposed on the upper surface of the turntable 24, and a second pointer 272 mounted on the swing base 23 for indicating the second angle scale 271 corresponding to the rotation of the turntable 24. When the head mold 1 is in the initial position, the second pointer 272 points to the zero value of the second angle scale 271. After rotating the turntable 24 in both directions, the rotation angle of the turntable 24 can be obtained directly through the degree corresponding to the second angle scale 271 pointed to by the second pointer 272.

[0043] To improve the level of automation and efficiency of inspection, angle sensors connected to the control system can replace the first and second protractors. Two motors connected to the control system drive the swing base 23 and the turntable 24 to rotate. Photosensitive sensors connected to the control system are installed at the pupil positioning points of the two eyes of the head mold 1 to detect whether the laser beam illuminates the pupil positioning points. When the photosensitive sensors detect that the laser beam is blocked by the sample and cannot illuminate the pupil positioning points, the motors stop. The rotation angle signal measured by the angle sensors is sent to the control system, which automatically determines whether the sample is qualified and sends the result to the display device. This allows for automated detection of the rotation angles of the swing base 23 and the turntable 24.

[0044] In this embodiment, the support base 25 includes a lower connecting block 251, a support rod 252, and an upper connecting block 253. The lower connecting block 251 is fixed to the turntable 24 and has a first adjustment groove. The bottom end of the support rod 252 is adjustablely installed in the first adjustment groove. The upper connecting block 253 is fixed to the top end of the support rod 252 and has a second adjustment groove. The head mold 1 is adjustablely installed in the second adjustment groove to switch the laser beam direct point between two pupil positioning points. By adjusting the installation position of the bottom end of the support rod 252, it is easy to adjust the two pupil positioning points of the head mold 1 to the axis of the horizontal axis 22, ensuring that the head mold 1 rotates with the pupil positioning points as reference points, thereby improving the detection accuracy. If the two pupil positioning points of the head mold 1 deviate from the axis of the horizontal axis 22, the measured rotation angle will be inaccurate.

[0045] Optionally, the protective eye mask field of view detector of the present invention further includes a base plate 4, and two supports 21 are fixedly erected on the base plate 4, which can improve the stability of the support 21. In order to facilitate the fixing of the position of the laser emitter 3 and ensure that the laser beam directly hits the pupil positioning point, the protective eye mask field of view detector of the present invention may also include a support column 5 fixed on the base plate 4. The support column 5 and the two supports 21 are fixed on the base plate 4 in an isosceles triangle. The support column 5 is located at the vertex of the isosceles triangle. The laser emitter 3 is installed on the support column 5. In this way, the laser beam emitted by the laser emitter 3, the axis of the horizontal axis 22, and the axis of the turntable 24 are all perpendicular to each other and intersect at a pupil positioning point of the head mold 1, thereby ensuring the detection accuracy.

[0046] Please refer to the following: Figure 7 and Figure 8 The present invention also provides a method for using a protective eye mask field of view detector, comprising the following steps:

[0047] The sample to be tested (eye mask or face mask) is worn on the head mold 1. When the head mold 1 is in the initial position, the head mold 1 faces the laser emitter 3. The laser beam emitted by the laser emitter 3 passes through the sample to be tested and shines horizontally on a pupil positioning point of the head mold 1. Rotate the turntable 24 clockwise to drive the head mold 1 to rotate clockwise until the laser beam is blocked by the sample to be tested and cannot shine on the pupil positioning point. The first angle of rotation of the turntable 24 is read by the second protractor 27. The first angle is the temporal horizontal visual field angle ∠1.

[0048] Then, rotate the turntable 24 counterclockwise back to the initial position of the head mold 1 and continue to rotate until the laser beam is blocked by the sample to be tested and cannot irradiate the pupil positioning point. The second angle of the turntable 24 rotating counterclockwise from the initial position of the head mold 1 is read by the second protractor 27. The second angle is the horizontal visual field angle ∠3 on the nasal side.

[0049] Then, rotate the turntable 24 clockwise to return to the initial position of the head mold 1. When the swing seat 23 is in the initial position, the reading of the first protractor 26 is zero. Rotate the swing seat 23 clockwise around the horizontal axis 22, causing the head mold 1 to rotate accordingly, until the laser beam is blocked by the sample to be tested and cannot irradiate the pupil positioning point. Read the third angle of the rotation of the swing seat 23 around the horizontal axis 22 through the first protractor 26. The third angle is the vertical upward field of view angle ∠5.

[0050] Then, the swing seat 23 is rotated counterclockwise to return to the initial position and continues to rotate until the laser beam is blocked by the sample to be tested and cannot irradiate the pupil positioning point. The fourth angle of the swing seat 23 rotating around the horizontal axis 22 from its initial position is read by the first protractor 26. The fourth angle is the downward field of view angle ∠6 in the vertical direction.

[0051] Through the above steps, the visual field angles corresponding to one eye are detected. By adjusting the position of the head model 1 on the support 25, the laser beam emitted by the laser emitter 3 is made to pass through the sample under test and directly hit the other pupil positioning point of the head model 1. The visual field angles of the other eye are then measured according to the corresponding steps described above.

[0052] To improve testing accuracy, the following calibration steps are included before fitting the sample to be tested onto the head mold 1:

[0053] 1. With head mold 1 facing laser emitter 3, adjust the left and right position of head mold 1 so that the laser beam is horizontally and directly aimed at a pupil positioning point;

[0054] 2. The head mold 1 is rotated 90° and locked by the turntable 24;

[0055] 3. Adjust the position of the head mold 1 using the support base 25 so that the laser beam is horizontally and directly directed from one side of the head mold 1 to the pupil positioning point;

[0056] 4. Rotate the head model 90° in the opposite direction so that head model 1 faces the laser emitter 3;

[0057] 5. Rotate the head mold 1 45° clockwise and counterclockwise by swinging the swing seat 23, and observe whether the laser point is always at the pupil positioning point;

[0058] 6. Return head mold 1 to face laser emitter 3, and then wear the sample to be tested for inspection.

[0059] Through the above calibration steps, the laser beam emitted by the laser emitter 3, the axis of the horizontal axis 22, and the axis of the turntable 24 can all be perpendicular to each other and intersect at a pupil positioning point of the head mold 1, thereby ensuring detection accuracy.

[0060] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying importance; the terms "bottom surface" and "top surface," "inner" and "outer" respectively refer to the geometric direction toward or away from a specific component.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective goggle mask field of view measuring instrument, characterized in that, The application relates to a head model positioning device and a laser emitter, and comprises a head model (1), a head model positioning device (2) and a laser emitter (3), the head model (1) is installed on the head model positioning device (2), both eyes of the head model (1) have pupil positioning points, the head model positioning device (2) comprises a support (21), a horizontal shaft (22), a swing seat (23), a rotating disc (24) and a supporting seat (25), the swing seat (23) is rotationally connected to the support (21) through the horizontal shaft (22), the swing seat (23) is provided with a first protractor (26) for measuring the rotation angle of the swing seat (23), the axis of the horizontal shaft (22) horizontally penetrates the two pupil positioning points, the rotating disc (24) is rotatably installed on the swing seat (23), the rotating disc (24) is provided with a second protractor (27) for measuring the rotation angle of the rotating disc (24), the axis of the rotating disc (24) and the axis of the horizontal shaft (22) perpendicularly intersect at one pupil positioning point, the supporting seat (25) is installed on the rotating disc (24), the head model (1) is installed on the supporting seat (25) in a position-adjustable manner along the horizontal shaft (22), and the laser emitter (3) is arranged in front of the head model (1) to horizontally emit a laser beam to one pupil positioning point of the head model (1), the position of the head model (1) is adjusted along the horizontal shaft (22) to make the laser beam horizontally emit to the other pupil positioning point.

2. The protective eyewear face shield field of view detector of claim 1, wherein, The swing seat (23) comprises two end plates (231), a guide rod (232) connected between the bottom ends of the two end plates (231), and a bearing seat (233) installed on the guide rod (232), the bearing seat (233) is fixed on the two guide rods (232) in a position-adjustable manner along the guide rod (232), the top ends of the two end plates (231) are rotationally connected to the support (21) through the horizontal shaft (22), and the rotating disc (24) is rotationally installed on the bearing seat (233).

3. The protective eyewear face shield field of view detector of claim 2, wherein, The top end of the end plate (231) is a sector, the first protractor (26) comprises a first angle scale (261) arranged on the sector and a first pointer (262) arranged on the support (21) and used for indicating the corresponding first angle scale (261) after the swing seat (23) is rotated, and when the swing seat (23) is in an initial position, the first pointer (262) points to the zero scale value of the first angle scale (261).

4. The protective eyewear face shield field-of-view detector of claim 3, wherein, The sector of the end plate (231) is provided with an arc-shaped groove (234), and the arc-shaped groove (234) is provided with a detachable locking piece (235) to lock the swing seat (23) on the support (21) when the rotating disc (24) is rotated.

5. The protective eyewear face shield field-of-view detector of claim 1, wherein, The second protractor (27) comprises a second angle scale (271) arranged on the upper surface of the rotating disc (24) and a second pointer (272) installed on the swing seat (23) and used for indicating the corresponding second angle scale (271) after the rotating disc (24) is rotated, and when the head model (1) is in an initial position, the second pointer (272) points to the zero scale value of the second angle scale (271).

6. The protective eyewear face shield field-of-view detector of claim 1, wherein, The support base (25) comprises a lower connecting block (251), a support rod (252) and an upper connecting block (253), the lower connecting block (251) is fixed on the rotating disc (24), the lower connecting block (251) is provided with a first adjusting groove, the bottom end of the support rod (252) is adjustably installed in the first adjusting groove, the upper connecting block (253) is fixed on the top end of the support rod (252), the upper connecting block (253) is provided with a second adjusting groove, the head mold (1) is adjustably installed in the second adjusting groove, so as to switch the straight laser beam between the two pupil positioning points.

7. The protective eyewear face shield field-of-view detector of claim 1, wherein, The bottom plate (4) and the support column (5) are further included, the support column (5) and the two supports (21) are isosceles triangle fixed on the bottom plate (4), and the laser emitter (3) is installed on the support column (5).

8. A method of using the field of view detector for protective eyewear masks according to any one of claims 1-7, characterized in that, The method comprises the following steps: The sample to be detected is worn on the head mold (1), when the head mold (1) is in the initial position, the head mold (1) faces the laser emitter (3), the laser beam emitted by the laser emitter (3) transmits through the sample to be detected and horizontally directly irradiates one pupil positioning point of the head mold (1), the rotating disc (24) is rotated in the clockwise direction, the head mold (1) is driven to rotate in the clockwise direction, until the laser beam is blocked by the sample to be detected and cannot irradiate the pupil positioning point, the first angle of rotation of the rotating disc (24) is read by the second protractor (27), and the first angle is the horizontal direction visual field angle (1) of the temporal side. The rotating disc (24) is rotated in the counterclockwise direction to return to the initial position of the head mold (1) and continues to rotate until the laser beam is blocked by the sample to be detected and cannot irradiate the pupil positioning point, the second angle of rotation of the rotating disc (24) from the initial position of the head mold (1) in the counterclockwise direction is read by the second protractor (27), and the second angle is the horizontal direction visual field angle (3) of the nasal side.

9. The method of the protective eyewear field detector according to claim 8, wherein, The rotating disc (24) is rotated in the clockwise direction to return to the initial position of the head mold (1), when the swing base (23) is in the initial position, the reading of the first protractor (26) is zero, the swing base (23) is rotated in the clockwise direction around the horizontal shaft (22), the head mold (1) is correspondingly rotated, until the laser beam is blocked by the sample to be detected and cannot irradiate the pupil positioning point, the third angle of rotation of the swing base (23) around the horizontal shaft (22) is read by the first protractor (26), and the third angle is the vertical direction upper visual field angle (5). The swing base (23) is rotated in the counterclockwise direction to return to the initial position and continues to rotate until the laser beam is blocked by the sample to be detected and cannot irradiate the pupil positioning point, the fourth angle of rotation of the swing base (23) around the horizontal shaft (22) from the initial position is read by the first protractor (26), and the fourth angle is the vertical direction lower visual field angle (6). Through the above steps, the visual field angles corresponding to one eye are detected, the position of the head mold (1) on the support base (25) is adjusted, the laser beam emitted by the laser emitter (3) transmits through the sample to be detected and horizontally directly irradiates the other pupil positioning point of the head mold (1), and the visual field angles of the other eye are measured through the above corresponding steps.

10. The method of claim 8, wherein, Before wearing the sample to be detected on the head model (1), the following calibration steps are further included: The head model (1) faces the laser emitter (3), and the left and right positions of the head model (1) are adjusted so that the laser beam is horizontally and directly incident on a pupil positioning point; The head model (1) is rotated by 90° by the rotating disc (24) and locked; The position of the head model (1) is adjusted by the supporting seat (25) so that the laser beam is horizontally and directly incident on the pupil positioning point from one side of the head model (1); The head model (1) is rotated by 90° in the opposite direction so that the head model (1) faces the laser emitter (3); The head model (1) is rotated by 45° in the forward and reverse directions by the swing seat (23), and it is observed whether the laser point is always on the pupil positioning point; the head model (1) is returned to face the laser emitter (3), and the sample to be detected can be worn for detection.

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