Slit lamp optical filter clamp

Abstract

The utility model relates to the technical field of medical instruments, in particular to a slit lamp optical filter clamp. According to the technical scheme, a light guide pipe is arranged at the upper end of a base, a beam splitter prism is installed at the top end of the light guide pipe, a slit lamp is arranged in the base, and light of the slit lamp penetrates through the light guide pipe and is reflected through the beam splitter prism; a connecting rod is arranged on one side of the light guide pipe, a baffle is installed on the connecting rod, and a first light filter and a second light filter are clamped and fixed between the connecting rod and the baffle. Through the ingenious design of the connecting rod, the baffle plate, the tension spring and the inserting rod, a user can easily replace the first optical filter and the second optical filter, so that a white light optical filter or a fluorescein optical filter plate suitable for the current inspection requirement can be quickly selected. The design improves the flexibility and efficiency of inspection.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a slit lamp filter fixture. Background Art

[0002] The slit lamp microscope is an important instrument that is indispensable for ophthalmic examinations. When using the slit lamp, a filter device is required to make the imaging clearer and more accurate. After searching, the Chinese patent announcement number CN117898670A discloses a fully automatic naked-eye 3D slit lamp microscope and its control method. Although the device controls the solenoid valve by setting a diffuser to drive the position of the diffuser when in use, adjusts the focused light entering the slit light source emission prism, and makes the diffuser adjust the light spot astigmatism, the device can only adjust the light spot by driving the position of the diffuser when in use, and cannot select the use of white light filter or fluorescein filter as needed, and cannot meet the use requirements. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a slit lamp filter fixture, which solves the problems raised in the background art.

[0004] The utility model solves the above-mentioned technical problems as follows:

[0005] A slit lamp filter fixture comprises a base, a light guide tube is provided at the upper end of the base, a beam splitter prism is mounted on the top end of the light guide tube, a slit lamp is provided in the base, light from the slit lamp passes through the light guide tube and is reflected by the beam splitter prism;

[0006] A connecting rod is provided on one side of the light guide tube, a baffle is mounted on the connecting rod, and a first filter and a second filter are clamped and fixed between the connecting rod and the baffle.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a white light filter and a fluorescein filter plate are provided on the first filter and the second filter respectively.

[0009] The beneficial effects of adopting the above further scheme are:

[0010] This design enables the slit lamp filter holder to support two different examination modes—white light mode and fluorescein mode. The white light filter and yellow fluorescein filter are optimized for different examination requirements. The white light filter diffuses the light source, making the light softer and improving the patient's experience. The yellow fluorescein filter, on the other hand, enhances contrast and provides clearer images when examining corneal staining and contact lens fitting. This design helps improve diagnostic accuracy and reliability. This versatility greatly enhances the flexibility and application range of the device. Because the first and second filters can be easily exchanged in the holder, clinicians can switch from white light to fluorescein examinations in a short time without having to replace the entire holder or adjust complex settings. This fast switching capability is particularly important in ophthalmology clinics or hospitals that need to perform multiple examinations simultaneously.

[0011] Furthermore, a blind hole is provided on the connecting rod, and a tension spring is installed in the blind hole. A plug-in rod is provided on the baffle, and both ends of the tension spring are respectively connected and fixed to the connecting rod and the plug-in rod.

[0012] The beneficial effects of adopting the above further scheme are:

[0013] The tension spring provides a resilient clamping force for the filter. When the filter is placed between the connecting rod and the baffle, the tension of the tension spring causes the connecting rod and the baffle to tightly clamp the filter, preventing it from loosening or falling out during inspection. This secure clamping force ensures the stability of the filter during use, allowing it to remain in place even in the presence of vibration or accidental contact, thereby ensuring light stability and inspection accuracy. When the filter needs to be replaced, the user can simply compress the tension spring to release the clamping force and easily remove the filter from between the connecting rod and the baffle. This design simplifies the filter replacement process and improves work efficiency.

[0014] Furthermore, through holes are formed through the first filter and the second filter, and the positions and sizes of the through holes are adapted to the plug-in rod. The first filter and the second filter are mounted on the plug-in rod through the through holes.

[0015] The beneficial effects of adopting the above further scheme are:

[0016] The through-hole design allows the filter to be precisely aligned with the rod during installation, eliminating installation difficulties or instability caused by misalignment. This precise positioning ensures the filter maintains the correct position and angle during use, ensuring accurate light transmission. The filter is attached to the rod through the through-hole, and combined with the tension of the tension spring, a stable mounting structure is formed.

[0017] Furthermore, a card slot is provided through the through holes of the first filter and the second filter, and a limit block is provided on the plug rod. After the first filter and the second filter are rotated, they are locked by the card slot and the limit block.

[0018] The beneficial effects of adopting the above further scheme are:

[0019] The snap-fit ​​design of the slot and stop ensures the filter's secure installation. Once the filter is properly positioned, the slot engages the stop, forming a secure locking mechanism that prevents the filter from accidentally loosening and falling out during use. This locking mechanism not only enhances the filter's secure installation but also the stability of the entire fixture system. It reduces vibration and displacement caused by a loose filter, thereby ensuring stable and accurate light transmission.

[0020] The utility model provides a slit lamp filter fixture. It has the following beneficial effects:

[0021] The ingenious design of the connecting rod, baffle, tension spring, and plug-in rod allows users to easily swap between the primary and secondary filters, quickly selecting the white light filter or fluorescein filter plate that suits the current inspection needs. This design improves inspection flexibility and efficiency. The ingenious design of the connecting rod, baffle, tension spring, and plug-in rod allows users to easily swap between the primary and secondary filters, quickly selecting the white light filter or fluorescein filter plate that suits the current inspection needs. This design improves inspection flexibility and efficiency.

[0022] The coordinated use of the connecting rod, baffle, and tension spring ensures the filter's stability during clamping, preventing it from shifting or falling during inspection, ensuring accurate and safe inspection. The slots on the first and second filters engage with the stoppers on the connecting rod, locking the filters. This design further enhances filter stability during use and prevents loosening due to vibration or accidental contact.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following is a detailed description of the preferred embodiments of the present invention with the accompanying drawings. The specific implementation methods of the present invention are given in detail in the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] In the attached figure:

[0026] Figure 1 This is a schematic diagram of the axial side appearance of the utility model;

[0027] Figure 2 This is a schematic diagram of the explosion structure of the optical filter of the present utility model;

[0028] Figure 3 This is a schematic diagram of the backward explosion structure of the optical filter of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 1. Base; 2. Light guide; 3. Beam splitter; 4. First filter; 5. White light filter; 6. Connecting rod; 7. Baffle; 8. Second filter; 9. Fluorescent filter plate; 10. Tension spring; 11. Slot; 12. Through hole; 13. Connecting rod; 14. Limit block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1 to 3 As shown, the embodiment provided by the utility model:

[0033] Example 1

[0034] A slit lamp filter fixture includes a base 1. A light guide tube 2 is provided at the upper end of the base 1. A beam splitter prism 3 is installed at the top end of the light guide tube 2. A slit lamp is provided in the base 1. Light from the slit lamp passes through the light guide tube 2 and is reflected by the beam splitter prism 3 to illuminate the patient's eyes.

[0035] Example 2

[0036] like Figures 1 to 3As shown, the present invention proposes a slit lamp filter holder. Compared to the first embodiment, this embodiment further includes: a connecting rod 6 is provided on one side of the light guide 2, and a baffle 7 is mounted on the connecting rod 6. A first filter 4 and a second filter 8 are clamped and fixed between the connecting rod 6 and the baffle 7, facilitating the user to select a white light filter 5 or a fluorescein filter 9 as needed. The connecting rod 6 has a blind hole, and a tension spring 10 is installed in the blind hole. The baffle 7 has a plug-in rod 13, and the ends of the tension spring 10 are respectively connected and fixed to the connecting rod 6 and the plug-in rod 13. The presence of the tension spring 10 provides an elastic clamping force for the filter. When the filter is placed between the connecting rod 6 and the baffle 7, the tension of the tension spring 10 causes the connecting rod 6 and the baffle 7 to tightly clamp the filter, preventing it from loosening or falling off during the inspection process. This firm clamping force ensures the stability of the filter during use, allowing it to remain in place even in the presence of vibration or accidental contact, thereby ensuring light stability and accurate inspection. When the filter needs to be replaced, the user can simply compress the tension spring 10 to release the clamping force on the filter, then easily remove the filter from between the connecting rod 6 and the baffle 7. This design simplifies the filter replacement process and improves work efficiency. Through-holes 12 are formed through the first and second filters 4, 8. The position and size of through-holes 12 match the plug-in rod 13. The first and second filters 4, 8 are installed on the plug-in rod 13 through through-holes 12. The design of through-holes 12 ensures that the filters are precisely aligned with the plug-in rod 13 during installation, avoiding installation difficulties or instability caused by positional deviations. This precise positioning ensures that the filters maintain the correct position and angle during use, thereby ensuring accurate light transmission. The filters are attached to the connecting rod 13 through through-holes 12. Combined with the tension of the tension spring 10, this creates a stable mounting structure. A slot 11 extends through the through-holes 12 of the first and second filters 4, 8. A stopper 14 is provided on the connecting rod 13. After the first and second filters 4, 8 are rotated, the slots 11 and stopper 14 engage and lock the two together. This design of the slots 11 and stopper 14 ensures the stability of the filters after installation. When the filters are rotated to the appropriate position, the slots 11 tightly engage the stopper 14, forming a reliable locking mechanism that prevents the filters from accidentally loosening and falling off during use. This locking mechanism not only improves the stability of the filter installation but also enhances the stability of the entire fixture system. This reduces vibration and displacement caused by loose filters, thereby ensuring stable and accurate light transmission. The first filter 4 and second filter 8 are equipped with a white light filter 5 and a fluorescein filter plate 9, respectively. This design enables the slit lamp filter holder to support two different examination modes—white light mode and fluorescein mode. The white light filter 5 and fluorescein filter plate 9 are optimized for different examination requirements.The white light filter 5 provides a more comprehensive fundus image, helping doctors identify fundus lesions; while the fluorescein filter 9 highlights the details of the fundus blood vessels, helping doctors more accurately assess vascular health. This design helps improve diagnostic accuracy and reliability. This versatility greatly enhances the device's flexibility and application range. Because the first filter 4 and the second filter 8 can be easily replaced using a fixture, doctors can switch from white light examination to fluorescein examination in a short time without having to replace the entire fixture or adjust complex settings. This fast switching capability is particularly important for ophthalmology clinics or hospitals that need to perform multiple examinations simultaneously.

[0037] Working principle:

[0038] The slit lamp serves as a light source, emitting light. This light is crucial in ophthalmic examinations, as it illuminates the patient's eyes for detailed observation. Light from the light source is transmitted through a light pipe 2. The design of the light pipe 2 ensures efficient and stable transmission of light to the beam splitter prism 3, minimizing light scattering and loss.

[0039] Upon reaching the beam splitter prism 3, the light is reflected according to the prism's optical properties. The beam splitter prism 3 precisely directs the light in the desired direction, namely the patient's eye. Furthermore, it can also perform spectroscopic processing as needed, separating the light into different wavelengths or paths to meet different examination requirements.

[0040] Based on the examination requirements, the user can select and install the appropriate first filter 4 or second filter 8 using the fixture's connecting rod 6, baffle 7, and other structures. These filters have different optical properties, capable of filtering out unwanted wavelengths of light and allowing only specific wavelengths of light to pass through. When light passes through the filters, they block most of the unwanted light and only allow specific light (such as white light or cobalt blue light) to pass through. In this way, the light reaching the patient's eye is carefully filtered and selected, clearly displaying the structure and pathology of the eye.

[0041] Filtered light shines onto the patient's eye, forming a clear optical section or image. The doctor observes this optical section or image through the binocular system of the slit lamp microscope. The microscope's magnification function allows the doctor to clearly see the details of the eye's structure, enabling accurate evaluation and diagnosis.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A slit lamp filter holder, comprising a base (1), a light guide (2) provided at the upper end of the base (1), a beam splitter prism (3) mounted at the top end of the light guide (2), a slit lamp provided in the base (1), light from the slit lamp passing through the light guide (2) and reflected by the beam splitter prism (3), characterized in that: A connecting rod (6) is provided on one side of the light guide tube (2), a baffle (7) is mounted on the connecting rod (6), and a first filter (4) and a second filter (8) are clamped and fixed between the connecting rod (6) and the baffle (7).

2. The slit lamp filter holder according to claim 1, characterized in that: A white light filter (5) and a fluorescein filter plate (9) are respectively provided on the first filter (4) and the second filter (8).

3. The slit lamp filter holder according to claim 1, characterized in that: The connecting rod (6) is provided with a blind hole, and a tension spring (10) is installed in the blind hole. The baffle (7) is provided with a plug-in rod (13), and the two ends of the tension spring (10) are respectively connected and fixed to the connecting rod (6) and the plug-in rod (13).

4. The slit lamp filter holder according to claim 1, characterized in that: A through hole (12) is provided through the first optical filter (4) and the second optical filter (8), the position and size of the through hole (12) being adapted to the plug-in rod (13), and the first optical filter (4) and the second optical filter (8) are sleeved and mounted on the plug-in rod (13) through the through hole (12).

5. The slit lamp filter holder according to claim 3, characterized in that: A clamping slot (11) is provided through the through holes (12) of the first optical filter (4) and the second optical filter (8), and a limiting block (14) is provided on the connecting rod (13). After the first optical filter (4) and the second optical filter (8) are rotated, they are locked by being mutually engaged with the clamping slot (11) and the limiting block (14).

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