Portable field of view

Abstract

This utility model provides a portable perimeter, including a support frame and an inflatable component detachably connected to the support frame. The inflatable component, when inflated, has an inner surface with a spherical surface and a through hole at its center. A camera is positioned on the support frame corresponding to the through hole. A projector is also positioned on the support frame on the side opposite the camera. The reduced volume of the inflatable component after deflating makes the overall perimeter smaller and easier to carry.

Description

Technical Field

[0001] This utility model relates to the field of ophthalmic examination equipment, and in particular to a portable perimeter. Background Technology

[0002] A perimeter is an ophthalmic examination instrument used to measure and examine the range of the human eye's visual field and any visual field defects. It primarily detects the visual field based on the principle that the human eye produces visual responses to visual targets of different directions and brightness. By recording the subject's response to the appearance of the targets, the visual field range and visual sensitivity are determined, thereby assessing whether the visual field is normal and whether any abnormalities such as visual field defects exist.

[0003] In the existing technology, the structural design of the field of view meter results in its large size and poor portability. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies in the aforementioned technology by providing a portable field of view, aiming to improve the portability of the field of view and make it convenient for use in situations such as at home.

[0005] The objective of this utility model is achieved as follows: This application provides a portable field of view meter, including a support frame and an inflatable component detachably connected to the support frame; wherein,

[0006] The inner surface of the inflatable component after inflation includes a spherical surface, and a through hole is provided at the center of the spherical surface;

[0007] A camera is provided at the corresponding position of the support frame and the through hole;

[0008] A projector is also installed on the support frame on the side opposite to the camera.

[0009] In the above design, the field of view consists of a support frame and an inflatable component. The inflatable component can be deflated when the field of view is being carried. The volume of the deflated inflatable component is reduced, making the overall size of the field of view smaller and easier to carry.

[0010] In some possible implementations, the inflatable component includes a spherical portion and a connecting portion for connection with the support frame.

[0011] In some possible implementations, the connecting part includes an observation window, and a connector is provided around the observation window. The connecting part is connected to the support frame through the connector.

[0012] In some possible implementations, the spherical portion includes a first surface and a second surface, wherein the first surface and the second surface are made of flexible material;

[0013] A first inflatable frame is sandwiched between the first surface and the second surface; the first inflatable frame is fixedly connected to the first surface and the second surface.

[0014] The first inflatable frame is made of flexible material and has a hollow structure for storing gas.

[0015] The second side of the first inflatable frame is hemispherical after inflation.

[0016] In some possible implementations, the connecting portion includes a third surface and a fourth surface, wherein the third surface and the fourth surface are made of flexible material;

[0017] A second inflatable frame is provided between the third surface and the fourth surface, and the second inflatable frame is fixedly connected to the third surface and the fourth surface;

[0018] The second inflatable frame is made of flexible material and has a hollow structure for storing gas;

[0019] After the second inflatable frame is inflated, its third and fourth surfaces are flat.

[0020] In some possible implementations, the support frame includes a crossbeam; one end of the crossbeam is connected to a column, and the column is connected to a camera.

[0021] The other end of the crossbeam is connected to a ring frame, and the upper part of the ring frame is connected to a projector.

[0022] In some possible implementations, the support frame is also provided with a face positioning structure.

[0023] In some possible implementations, the facial positioning includes a neck brace disposed at the lower part of the support frame and a forehead brace disposed at the upper part of the support frame, with the top of the forehead brace connected to the projector.

[0024] In some possible implementations, the neck brace includes a support plate and a handle connected below the support plate;

[0025] The handle is inserted into the support frame;

[0026] A locking element is also provided between the handle and the support frame.

[0027] In some possible implementations, the support frame further includes a connecting seat;

[0028] The connector includes a slot, and a top bolt is provided on one side of the slot. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the portable field of view meter of this utility model. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the structure of the portable field of view meter of this utility model. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the structure of the portable field of view meter of this utility model. Figure 3 ;

[0032] Figure 4 This is a schematic diagram of the support frame structure of the portable field of view meter of this utility model;

[0033] Figure 5 This is a schematic diagram of the cross-sectional structure of the portable field of view of this utility model. Figure 1 ;

[0034] Figure 6 This is a schematic diagram of the cross-sectional structure of the portable field of view of this utility model. Figure 2 . Detailed Implementation

[0035] This application provides a portable perimeter, which is connected to an inflatable component via a support frame. In use, air is inflated into the component, making its inner surface spherical, thus forming a hemispherical perimeter in conjunction with a camera and projector. When carrying, the air is expelled from the component, reducing its size and allowing it to be folded for easy portability. This solves the problem of existing perimeters being bulky and inconvenient to carry.

[0036] To facilitate understanding of the technical solution of this application, its application scenarios are described below:

[0037] A perimeter is an ophthalmic examination instrument used to measure and examine the range and extent of a person's visual field. It primarily works based on the principle that the human eye responds to visual stimuli of targets from different directions and brightness. By recording the subject's reaction to the targets, the range and sensitivity of their visual field are determined, thereby assessing whether the visual field is normal and whether any abnormalities such as visual field defects exist. Visual field testing is a fundamental method for diagnosing and monitoring glaucoma and other visual and optic nerve diseases. Close monitoring of the location and extent of visual field abnormalities plays a crucial role in treatment.

[0038] Perimeters can be classified into planar perimeters, curved perimeters, and hemispherical perimeters. Among them, the hemispherical perimeter has the widest range of applications, is the most commonly used perimeter, and has the highest accuracy.

[0039] The portable perimeter of this application is a hemispherical perimeter. The hemisphere is equivalent to a projection screen. There is a projector device in front of it. The projector device projects light spots at different positions on the hemispherical screen. The user can judge the field of view by recognizing the light spots.

[0040] When using the device, the user needs to look directly at the camera and use peripheral vision to identify the light spots on the projection screen. A single-eye test is typically performed, during which the other eye needs to be covered.

[0041] The following description, in conjunction with the accompanying drawings, further illustrates this implementation case:

[0042] Depend on Figure 1 — Figure 6 As can be seen, this application provides a portable field of vision meter, including a support frame 1 and an inflatable component 2 detachably connected to the support frame 1.

[0043] In some examples, the support frame 1 is used to secure the inflatable component 2. Specifically, when in use, the inflatable component 2 is inflated and then secured by the support frame 1. When not in use, the inflatable component 2 is deflated, resulting in a smaller volume that is easier to carry.

[0044] It should be understood that the inflatable component 2 and the support frame 1 can be fixedly connected, such as by fixing the inflatable component 2 to the support frame 1 with rivets or other components; or they can be detachably connected, such as by Velcro or other components. In addition, the inflatable component 2 is provided with an inflation port, the structure of which can adopt existing inflation structures, such as the inflation port structure of a swimming ring.

[0045] It should be noted that the support frame 1 can be a foldable support frame 1, which is smaller in size after folding and easier to carry; or it can be an integrated support frame 1, which is convenient for users to assemble.

[0046] In this application, the inner surface of the inflatable component 2 after inflation includes a spherical surface 21, and a through hole 22 is provided at the center of the spherical surface 21. A camera 3 is provided on the support frame 1 corresponding to the through hole 22, wherein the camera 3 is embedded in the through hole 22. When in use, the user needs to look at the camera 3.

[0047] It should be noted that in this embodiment, the through hole 22 is located at the center of the spherical surface 21, but this is not an absolute position; it is mainly for ease of understanding. Considering factors such as manufacturing errors, the through hole 22 may be offset from the center of the spherical surface 21. The limitation in this application is intended to ensure that when the through hole 22 is located at the center of the spherical surface 21, the space around the spherical surface 21 relative to the user's eyes is the same when the user looks at the camera 3, resulting in more accurate detection results.

[0048] In use, light spots need to be projected onto multiple positions of the spherical surface 21 through the projector 4. In this application, the projector 4 is installed on the support frame 1 on the side opposite to the camera 3.

[0049] It should be noted that during use, the projector 4 needs to be placed inside the inflatable component 2. The projector 4 can rotate and, according to the set program, randomly project light spots onto the spherical surface 21 of the inflatable component 2 to detect whether the user has any problems such as a lack of field of vision.

[0050] In some examples, the projector 4 is connected to the support frame 1 via a rotating assembly. This rotating assembly may include a horizontal rotating assembly 41 that controls the horizontal rotation of the projector 4, and a pitch rotating assembly 42 that controls the pitch of the projector 4. The horizontal rotating assembly 41 and the pitch rotating assembly 42 enable the projector 4 to project light spots at different positions on the spherical surface 21.

[0051] It should be understood that the field of view meter in this application also includes electronic control components.

[0052] In some examples, the electronic control components include an electronic control box 5 and a controller 6. The electronic control box 5 contains control circuitry for controlling the position and number of projected light spots by the projector 4. The user can provide feedback on the recognition of the light spots via the controller 6. For example, if the electronic control components indicate that a light spot is projecting, the user presses the controller 6 if they see the light spot, and does not press it if they do not see it. By comparing the position of the projected light spot corresponding to when the user presses the controller 6, the missing area in the user's field of vision can be determined.

[0053] In some examples, a communication module, such as Bluetooth, can be installed within the control box 5. The field of view meter connects to a mobile terminal via a wireless communication module. The mobile terminal can be a mobile phone, tablet, etc. Data such as the light spot projection position can be set via the mobile terminal, and reports can also be generated through the mobile terminal.

[0054] In the above scheme, the field of view consists of a support frame 1 and an inflatable component 2. When carrying it, the inflatable component 2 can be deflated. After deflation, the volume of the inflatable component 2 decreases, making the overall size of the field of view smaller and easier to carry.

[0055] In some alternative implementations, refer to Figures 1-3 The inflatable component 2 includes a spherical part 24 and a connecting part 23, which is used to connect with the support frame 1.

[0056] In some examples, the spherical part 24 and the connecting part 23 can be an integral structure or a separate structure. When a separate structure is used, the spherical part 24 and the connecting part 23 can be connected by Velcro, buckles, or other means. In this embodiment, the inflatable component 2 and the support frame 1 adopt a detachable connection structure, which is convenient for carrying and storage after disassembly.

[0057] In some alternative implementations, see [link / reference] Figure 3 The connecting part 23 includes an observation window 231, and a connector 232 is provided around the observation window 231. The connecting part 23 is connected to the support frame 1 through the connector 232.

[0058] In some examples, the observation window 231 is used by the user to observe the interior of the inflatable component 2 through the observation window 231 to identify the light spot emitted by the projector 4.

[0059] In some examples, the connector 232 can be Velcro. The Velcro is fixedly connected to the connecting part 23. A similar Velcro strip is also provided on the side of the support frame 1 away from the camera 3, which is then glued to the connector 232. The connector 232 is folded from the inner layer of the viewing window 231 and glued to the Velcro on the support frame 1, thereby securing the inflatable component 2 to the support frame 1. The connection between the connector 232 and the support frame 1 facilitates operation.

[0060] In some possible implementations, see [reference] Figure 5 The spherical part 24 includes a first surface 241 and a second surface 242, both of which are made of flexible material. A first inflatable frame 243 is sandwiched between the first surface 241 and the second surface 242, and the first inflatable frame 243 is fixedly connected to the first surface 241 and the second surface 242.

[0061] In some examples, to make the appearance of the inflatable component 2 simple, the inflatable component 2 in this application includes a first surface 241 and a second surface 242 with the same shape.

[0062] In some examples, the first surface 241, when inflated, becomes a spherical surface 21, and the second surface 242, when inflated, is in the same state. The second surface 242 encloses the first surface 241 within it.

[0063] In some examples, the first surface 241, the first inflatable frame 243, and the second surface 242 can be fixedly connected by adhesive. The first inflatable frame 243 is made of flexible material and has a hollow structure for storing gas.

[0064] When air is inflated into the first inflatable frame 243, the first inflatable frame 243 expands under the action of air pressure, and at the same time, the first surface 241 and the second surface 242 deform accordingly.

[0065] Since the first side 241, the first inflatable frame 243, and the second side 242 are all made of flexible materials, their shapes can be folded freely after deflating, making them easy to carry.

[0066] In some examples, the first inflatable frame 243 is made of a material with good airtightness, such as rubber. The first surface 241 and the second surface 242 can be made of materials such as cloth or plastic.

[0067] Since the first inflatable frame 243 is located between the first surface 241 and the second surface 242, the first surface 241 and the second surface 242 provide a certain degree of protection for the first inflatable frame 243 and reduce the risk of air leakage.

[0068] In some possible implementations, see [reference] Figure 6 The connecting part 23 includes a third surface 231 and a fourth surface 232, both of which are made of flexible material. A second inflatable frame 233 is provided between the third surface 231 and the fourth surface 232, and the second inflatable frame 233 is fixedly connected to the third surface 231 and the fourth surface 232.

[0069] In some examples, the third surface 231, the second inflatable frame 233, and the fourth surface 232 can be fixedly connected by adhesive.

[0070] In some examples, the second inflatable frame 233 is made of a flexible material and has a hollow structure for storing gas. After the second inflatable frame 233 is inflated, it supports the third surface 231 and the fourth surface 232 under air pressure.

[0071] Since the third side 231, the second inflatable frame 233, and the fourth side 232 are all made of flexible materials, their shapes can be folded freely after deflating, making them easy to carry.

[0072] It should be understood that the second inflatable frame 233 can be connected to the first inflatable frame 243 to share an inflation port, or it can be inflated separately.

[0073] In some examples, the second inflatable frame 233 is made of a material with good airtightness, such as rubber. The third surface 231 and the fourth surface 232 can be made of materials such as fabric or plastic.

[0074] Since the second inflatable frame 233 is located between the third surface 231 and the fourth surface 232, the third surface 231 and the fourth surface 232 provide a certain degree of protection for the second inflatable frame 233 and reduce the risk of air leakage.

[0075] To improve the neatness of the appearance of the inflatable component 2 after inflation, the third surface 231 and the fourth surface 232 of the second inflatable frame 233 are flat after inflation.

[0076] In some possible implementations, see [reference] Figure 4 The support frame 1 includes a crossbeam 11, one end of which is connected to a column 12, and the column 12 is connected to a camera 3. The other end of the crossbeam 11 is connected to a ring frame 13, and the upper part of the ring frame 13 is connected to a projector 4.

[0077] In the above structure, the crossbeam 11 mainly serves as a connector, the column 12 is used to install the camera 3, and the ring frame 13 is used to fix the inflatable component 2.

[0078] In some examples, the beam 11 and the column 12, as well as the beam 11 and the ring frame 13, can be fixedly connected, such as a one-piece structure made by bending sheet metal, or by welding; they can also be rotatably connected, such as by a hinge structure; or they can be detachably connected, such as by bolts and nuts.

[0079] Fixed connections make assembly easier for users. Rotary or detachable connections make storage easier and improve portability.

[0080] In some possible implementations, see [reference] Figures 2-4 The support frame 1 is also equipped with a facial positioning structure. This structure limits the user's position during use, improving detection accuracy.

[0081] In some examples, facial positioning includes a neck brace 14 located at the lower part of the support frame 1 and a forehead brace 15 located at the upper part of the support frame 1, with the top of the forehead brace 15 connected to the projector 4.

[0082] In some examples, the neck brace 14 and the support frame 1 can be connected via a lifting mechanism, as different people have different heights and facial sizes. The ability to lift and connect the neck brace 14 and the support frame 1 allows for use by people of different heights; additionally, by adjusting the distance between the neck brace 14 and the forehead brace 15, it can accommodate people with different facial sizes.

[0083] For some specific examples, see Figure 4 The neck brace 14 includes a support plate 141 and a handle 142 connected below the support plate 141. To facilitate the fixing of the neck brace 14, the handle 142 is inserted into the support frame 1, and a locking member 143 is provided between the handle 142 and the support frame 1.

[0084] In some examples, locking element 143 may be a top bolt.

[0085] In some possible implementations, refer to Figures 1-4 The support frame 1 also includes a connecting seat 16, which includes a slot 161, and a top bolt 162 is provided on one side of the slot 161.

[0086] In some examples, when in use, the edge of the table can be inserted into the slot 161 and secured by the top bolt 162 for easy fixation and use.

[0087] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0088] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A portable perimeter characterized in that, It includes a support frame and an inflatable component detachably connected to the support frame; wherein, The inner surface of the inflatable component after inflation includes a spherical surface, and a through hole is provided at the center of the spherical surface; A camera is provided at the corresponding position of the support frame and the through hole; A projector is also installed on the support frame on the side opposite to the camera.

2. The portable perimeter according to claim 1, wherein, The inflatable component includes a spherical part and a connecting part, the connecting part being used to connect with the support frame.

3. The portable perimeter according to claim 2, wherein, The connecting part includes an observation window, and a connector is provided around the observation window. The connecting part is connected to the support frame through the connector.

4. The portable perimeter according to claim 2, wherein, The spherical portion includes a first surface and a second surface, wherein the first surface and the second surface are made of flexible material; A first inflatable frame is sandwiched between the first surface and the second surface; the first inflatable frame is fixedly connected to the first surface and the second surface. The first inflatable frame is made of flexible material and has a hollow structure for storing gas. The second side of the first inflatable frame is hemispherical after inflation.

5. The portable perimeter according to claim 2, wherein, The connecting portion includes a third surface and a fourth surface, and the third surface and the fourth surface are made of flexible material; A second inflatable frame is provided between the third surface and the fourth surface, and the second inflatable frame is fixedly connected to the third surface and the fourth surface; The second inflatable frame is made of flexible material and has a hollow structure for storing gas; After the second inflatable frame is inflated, its third and fourth surfaces are flat.

6. The portable perimeter ophthalmometer according to any one of claims 1 to 5, wherein The support frame includes a crossbeam; one end of the crossbeam is connected to a column, and the column is connected to a camera. The other end of the crossbeam is connected to a ring frame, and the upper part of the ring frame is connected to a projector.

7. The portable perimeter according to claim 6, wherein, The support frame is also equipped with a facial positioning structure.

8. The portable field of view according to claim 7, characterized in that, The facial positioning includes a neck brace located at the lower part of the support frame and a forehead brace located at the upper part of the support frame, with the top of the forehead brace connected to the projector.

9. The portable perimeter ophthalmometer of claim 8, wherein, The neck brace includes a support plate and a handle connected to the bottom of the support plate; The handle is inserted into the support frame; A locking element is also provided between the handle and the support frame.

10. The portable perimeter according to claim 6, wherein, The support frame also includes a connecting seat; The connector includes a slot, and a top bolt is provided on one side of the slot.

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