Pupil pen with comparison function
By introducing a ruler projection component and an illumination component into the pupil pen, and utilizing a combination of red and white LED lights, the problem of existing pupil pens being unable to provide a reference object is solved, enabling high-contrast pupil comparison and improving the accuracy and data reliability of RAPD examination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI PROVINCIAL HOSPITAL
- Filing Date
- 2025-04-16
- Publication Date
- 2026-07-03
Smart Images
Figure CN224441320U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pupil pen technology, and in particular to a pupil pen with a comparison function. Background Technology
[0002] Relative afferent pupillary disturbance (RAPD) is mainly used to detect lesions of the optic nerve and retina. During the examination, the examiner uses a pupillary pen to shine light on the patient's pupil and observes and compares the direct light response of the pupils of both eyes. When the healthy eye is shone, the pupil of the affected eye constricts due to indirect light reflex; when the affected eye is shone, the pupil of the affected eye does not constrict or constricts only slightly and slowly.
[0003] However, existing pupil pens only have an illumination function and cannot provide a reference object during the test. Medical staff need to judge whether the patient has RAPD based on their experience, which leads to low accuracy in the judgment. Utility Model Content
[0004] The purpose of this invention is to solve the problem that existing pupil pens cannot provide a reference object during detection, and to propose a pupil pen with comparison function.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A pupil pen with comparison function includes a barrel and a battery. One end of the barrel is provided with an illumination component, and the other end of the barrel is provided with a back cover. A scale projection component is provided inside the illumination component. The outer wall of the barrel is provided with anti-slip texture. The battery is located inside the barrel.
[0007] The scale projection assembly includes an inner cylinder, a red LED light is fixedly installed at one end of the inner cylinder facing the cylinder body, a convex lens is fixedly connected at the other end of the inner cylinder facing outwards, and a plane mirror is provided between the red LED light and the convex lens.
[0008] Preferably, the irradiation assembly includes a reflector cup, which is fixedly connected to the cylinder body. The reflector cup has a through hole at its center and multiple light guide grooves are formed around the through hole.
[0009] Preferably, the light guide groove is inclined at 10° toward the through hole, and a white LED light is fixedly installed inside the light guide groove.
[0010] Preferably, three shielding plates arranged in concentric circles are bonded to the side of the plane mirror facing the red LED light, and the shielding plates form an annular light-transmitting gap.
[0011] Preferably, the outer wall of the cylinder is provided with anti-slip texture, and a diffuser plate matching a white LED light is bonded between the cylinder and the inner cylinder.
[0012] Preferably, a pen holder is fixedly connected to the outer wall of the back cover, an electrode is provided at the end of the back cover facing the battery, and a control button is fixedly installed at the end of the back cover away from the battery.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] 1. This utility model, by setting a scale projection component, projects a 3.5mm diameter red halo after the red LED illuminates the shield and is refracted by the convex lens at a working distance of 5cm. This halo forms a high-contrast outline with the edge of the pupil, making it easy for medical staff to quickly compare the diameter. At the same time, the wavelength characteristics of red light can effectively avoid stimulating the contraction of the pupillary sphincter muscle, ensuring that the pupil is in a natural state during measurement and improving the reliability of the measurement data.
[0015] 2. By setting up an illumination component, the white LED light emits light at a 10° angle towards the center through the light guide groove to supplement the missing illumination at the red LED light. The light is evenly scattered by the diffuser, avoiding the interference of multiple light source ghosting and ensuring the visual separation between the ruler projection and the illumination spot. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of a pupil pen with comparison function proposed in this utility model;
[0017] Figure 2 This is a structural assembly diagram of a pupil pen with comparison function proposed in this utility model;
[0018] Figure 3 This is a schematic diagram of the internal structure of a pupil pen with comparison function proposed in this utility model;
[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0020] Figure 5 This is a structural assembly diagram of a ruler projection component in a pupil pen with comparison function proposed in this utility model.
[0021] In the diagram: 1. Body; 2. Battery; 3. Back cover; 4. Reflector; 5. Light guide groove; 6. White LED light; 7. Inner cylinder; 8. Red LED light; 9. Convex lens; 10. Plane mirror; 11. Shielding plate; 1101. Light transmission gap; 12. Soft light plate; 13. Pen holder; 14. Electrode; 15. Control button. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0023] Reference Figure 1-5 A pupil pen with comparison function includes a barrel 1 and a battery 2. One end of the barrel 1 is provided with an illumination component, and the other end of the barrel 1 is provided with a back cover 3. A ruler projection component is provided inside the illumination component, and the battery 2 is located inside the barrel 1.
[0024] The scale projection assembly includes an inner cylinder 7, a red LED light 8 is fixedly installed at one end of the inner cylinder 7 facing the cylinder body 1, a convex lens 9 is fixedly connected at the other end of the inner cylinder 7 facing outwards, and a plane mirror 10 is provided between the red LED light 8 and the convex lens 9.
[0025] Furthermore, the irradiation assembly includes a reflector cup 4, which is fixedly connected to the cylinder body 1. A through hole is provided in the center of the reflector cup 4, and multiple light guide grooves 5 are provided around the through hole. The light guide grooves 5 are inclined at 10° toward the through hole, and a white LED light 6 is fixedly installed in the light guide groove 5.
[0026] Furthermore, a shielding plate 11 arranged in concentric circles is attached to the side of the plane mirror 10 facing the red LED lamp 8. Three shielding plates 11 arranged in concentric circles are attached to the side of the plane mirror 10 facing the red LED lamp 8, and an annular light-transmitting gap 1101 is formed between the shielding plates 11.
[0027] It should be noted that: the shielding plate 11 is smaller than the plane mirror 10, and the gap between the outermost shielding plate 11 and the inner cylinder 7 is equal to the light transmission gap 1101, such as... Figure 3 As shown, the convex lens 9 is close to the shielding plate 11, and the convex lens 9 and the shielding plate 11 are far away from the red LED lamp 8. The distance between the shielding plate 11 and the convex lens 9 is less than twice the focal length of the convex lens 9, so that the red light emitted by the red LED lamp 8 passes through the light transmission gap 1101 and is refracted by the convex lens 9 at the working distance to project multiple inverted and reduced red light rings. This is the projection principle of the scale projection component, which will not be elaborated on later.
[0028] The red light transmitted between the outermost shielding plate 11 and the inner cylinder 7 forms a red halo with a diameter of 5mm at 5cm. The red light passing through the light transmission gap 1101 has diameters of 3.5mm and 2mm from the outside to the inside at 5cm. 3.5mm is the common diameter of the pupil in a normal state, 5mm is the maximum diameter of the pupil in the dark state, and 2mm is the minimum diameter of the pupil in the light state. These will not be elaborated further.
[0029] The further advantages of using the above method are: the red halo forms a clear and sharp ruler projection at a working distance of 5cm, creating a high-contrast outline with the edge of the pupil, which facilitates medical staff to quickly compare the diameter. At the same time, the wavelength characteristics of red light can effectively avoid stimulating the pupillary sphincter to contract, ensuring that the pupil is in a natural state during measurement, thus improving the reliability of the measurement data.
[0030] Furthermore, the outer wall of the cylinder body 1 is provided with anti-slip texture, and a diffuser plate 12 matching the white LED lamp 6 is bonded between the cylinder body 1 and the inner cylinder 7 to avoid ghosting when multiple white LED lamps 6 are irradiated, eliminate interference from multiple light sources, and ensure the visual separation between the scale projection and the illumination spot.
[0031] Furthermore, a pen holder 13 is fixedly connected to the outer wall of the back cover 3, an electrode 14 is provided at the end of the back cover 3 facing the battery 2, and a control button 15 is fixedly installed at the end of the back cover 3 away from the battery 2.
[0032] It should be noted that: control button 15 is electrically connected to white LED 6 and red LED 8. When control button 15 is pressed for the first time, red LED 8 lights up; when control button 15 is pressed for the second time, white LED 6 lights up; and when control button 15 is pressed for the third time, white LED 6 and red LED 8 turn off.
[0033] When using this utility model, it can be held in the pocket of clothing by the pen holder 13. Before the examination, the medical staff holds the body 1, places their thumb on the control button 15, and makes the front end of the pupil pen vertically aligned with the subject's eye, while maintaining a working distance of 5cm. During this process, the anti-slip texture on the outside of the body 1 increases the stability of operation.
[0034] During the examination, press the control button 15, and the red LED light 8 will light up. Multiple red ruler light rings will be projected onto the subject's eyes through the ruler projection component, thus forming a clear and sharp ruler projection at a working distance of 5cm. This creates a high-contrast outline with the edge of the pupil, making it easy for medical staff to quickly compare the diameter. At the same time, the wavelength characteristics of red light can effectively avoid stimulating the pupillary sphincter muscle to contract, ensuring that the pupil is in a natural state during measurement and improving the reliability of the measurement data.
[0035] After aligning the red scale halo with the subject's pupils, press the control button 15 again to turn on the white LED 6. The white LED 6 emits light at a 10° angle towards the center through the light guide groove 5 to supplement the missing illumination at the red LED 8. Then, the light is evenly diffused by the diffuser 12 between the cylinder 1 and the inner cylinder 7, avoiding interference from multiple light source ghosting and ensuring the visual separation between the scale projection and the illumination spot.
[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A pupil pen with comparison function, comprising a barrel (1) and a battery (2), characterized in that, An irradiation component is provided at one end of the cylinder (1), and a rear cover (3) is provided at the other end of the cylinder (1). A scale projection component is provided inside the irradiation component, and the battery (2) is located inside the cylinder (1). The scale projection assembly includes an inner cylinder (7), a red LED lamp (8) is fixedly installed at one end of the inner cylinder (7) facing the cylinder body (1), a convex lens (9) is fixedly connected at the other end of the inner cylinder (7) facing outward, and a plane mirror (10) is provided between the red LED lamp (8) and the convex lens (9).
2. The pupil pen with a ratio function according to claim 1, wherein: The irradiation assembly includes a reflector cup (4), which is fixedly connected to the cylinder body (1). A through hole is provided in the center of the reflector cup (4), and multiple light guide grooves (5) are provided around the through hole.
3. The pupil pen with a ratio function according to claim 2, wherein: The light guide groove (5) is inclined at 10° toward the through hole, and a white LED lamp (6) is fixedly installed inside the light guide groove (5).
4. The pupil pen with a ratio function according to claim 1, wherein: Three shielding plates (11) arranged in concentric circles are attached to the side of the plane mirror (10) facing the red LED lamp (8), and an annular light-transmitting gap (1101) is formed between the shielding plates (11).
5. The pupil pen with a ratio function according to claim 1, wherein: The outer wall of the cylinder (1) is provided with anti-slip texture, and a diffuser plate (12) matching the white LED lamp (6) is bonded between the cylinder (1) and the inner cylinder (7).
6. The pupil pen with a ratio function according to claim 1, wherein: A pen holder (13) is fixedly connected to the outer wall of the back cover (3). An electrode (14) is provided at the end of the back cover (3) facing the battery (2). A control button (15) is fixedly installed at the end of the back cover (3) away from the battery (2).