Fundus examination auxiliary device

Abstract

The invention discloses a fundus examination auxiliary device, and relates to the technical field of fundus examination.The fundus examination auxiliary device comprises a supporting frame and an ophthalmoscope arranged on the supporting frame, the supporting frame is provided with an inflation supporting mechanism, the inflation supporting mechanism comprises an inflation cushion and a supporting assembly, the middle of the inflation cushion is fixed to the supporting frame, and the supporting assembly is fixed to the supporting frame; the supporting assembly has a first state in which the two ends of the inflatable cushion are attached to the supporting frame and a second state in which the two ends of the inflatable cushion are driven to tilt to be attached to the head of the patient. According to the fundus examination auxiliary device, when a patient is ready to be examined, the supporting assembly is switched to the first state so that the inflatable cushion can be attached to the supporting frame, at the moment, the patient can lie on the supporting frame and rest on the inflatable cushion, and then the supporting assembly is switched to the second state so that the two ends of the inflatable cushion can tilt up; therefore, the inflatable cushion is attached to the head of the patient to limit the head of the patient, and the situation that the head swings when the patient is examined is avoided as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of fundus examination, and in particular to an auxiliary device for fundus examination. Background Art

[0002] Fundus examination is a medical examination method that uses professional equipment to observe the internal structures of the eyeball (such as the retina, optic nerve, blood vessels, etc.). It is mainly used to assess eye health and detect early lesions of systemic diseases (such as diabetes and hypertension).

[0003] For example, the patent document entitled "A Head Stabilization Device for Eye Examination," with authorization publication number CN221577672U and publication date August 23, 2024, includes a base plate with an inspection device and a support seat mounted on top. A support frame is mounted on top of the support seat, with a mandibular support and a forehead support positioned between the support frames. This patent provides a headrest to securely support the back of the patient's head, making the patient's head more secure, resulting in more accurate examination results and improved efficiency.

[0004] In the prior art, patients generally sit while receiving an ophthalmoscopy examination. Obviously, during this examination method, the patient's head is prone to swinging, which affects the medical staff's observation of the patient's eyes. Summary of the Invention

[0005] The purpose of the present invention is to provide an auxiliary device for fundus examination to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: An auxiliary device for fundus examination, comprising a support frame and an ophthalmoscope arranged on the support frame, wherein the support frame is provided with: The inflatable support mechanism includes an inflatable cushion and a support assembly. The middle part of the inflatable cushion is fixed on the support frame. The support assembly has a first state in which both ends of the inflatable cushion are fitted on the support frame and a second state in which both ends of the inflatable cushion are tilted up to fit the patient's head.

[0007] In the above fundus examination auxiliary device, the support frame is constructed with a first inflation channel connected to the inflation cushion.

[0008] In the above-mentioned fundus examination auxiliary device, the support assembly includes a second inflation channel constructed on the support frame, a support rod is slidably connected in the second inflation channel, and the top end of the support rod is limitedly connected to the inflation cushion.

[0009] In the above fundus examination auxiliary device, a fixing plate is fixed on the inflatable cushion, and the top end of the support rod is slidably connected to the fixing plate.

[0010] The above-mentioned fundus examination auxiliary device has a connecting cavity constructed on the support frame, the first inflation channel and the second inflation channel are both connected to the connecting cavity, and a sealing plate is slidably connected in the connecting cavity, and the sealing plate has a first position that opens the first inflation channel and blocks the second inflation channel and a second position that blocks the first inflation channel and opens the second inflation channel.

[0011] In the above fundus examination auxiliary device, the blocking plate is configured with a first hole and a second hole, and an elastic member for forcing the blocking plate to move toward one end is provided in the connecting cavity.

[0012] The above-mentioned fundus examination auxiliary device has a movable cavity constructed on the support frame, a first C-shaped tube connected to the first inflation channel is provided in the movable cavity, a first limit block is constructed on the blocking plate, and the first C-shaped tube extends from one end away from the first inflation channel to the moving range of the first limit block.

[0013] In the above-mentioned fundus examination auxiliary device, a second C-shaped tube connected to the second inflation channel is provided in the movable cavity, a second limit block is constructed on the sealing plate, and the second C-shaped tube extends from one end away from the second inflation channel to the moving range of the second limit block.

[0014] In the above fundus examination auxiliary device, both the first C-shaped tube and the second C-shaped tube are elastic and will deform when the air pressure inside them changes.

[0015] In the above fundus examination auxiliary device, a third hole is further formed on the blocking plate.

[0016] In the above technical solution, the present invention provides an auxiliary device for fundus examination. When preparing to examine a patient, the support component switches to the first state to make the inflatable cushion fit on the support frame. At this time, the patient can lie on the support frame and rest his head on the inflatable cushion. Then the support component switches to the second state to make the two ends of the inflatable cushion tilted, so that the inflatable cushion fits the patient's head to restrict the patient's head, and try to avoid the patient's head swinging when being examined. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2A schematic diagram of the fixing plate structure provided in yet another embodiment of the present invention; Figure 3 A schematic diagram of a support rod structure provided in yet another embodiment of the present invention; Figure 4 A schematic diagram of a first hole structure provided in yet another embodiment of the present invention; Figure 5 A schematic diagram of a second hole structure provided in yet another embodiment of the present invention; Figure 6 A schematic diagram of the sealing plate structure provided in yet another embodiment of the present invention; Figure 7 A schematic diagram of the elastic member structure provided in yet another embodiment of the present invention; Figure 8 A schematic diagram of an L-shaped baffle structure provided in yet another embodiment of the present invention; Figure 9 A schematic diagram of the structure of a raised portion provided in another embodiment of the present invention; Figure 10 A schematic diagram of the structure of a return spring provided in another embodiment of the present invention; Figure 11 This is a schematic diagram of the interference rod structure provided by another embodiment of the present invention.

[0019] Description of reference numerals: 1. Support frame; 2. Ophthalmoscope; 3. Inflatable cushion; 4. First inflation channel; 5. Second inflation channel; 6. Support rod; 7. Fixing plate; 8. Connecting column; 9. Connecting cavity; 10. Sealing plate; 11. First hole; 12. Second hole; 13. Elastic member; 14. First C-shaped tube; 15. First limit block; 16. Second C-shaped tube; 17. Second limit block; 18. L-shaped block; 19. Push rod; 20. Third hole; 21. Protrusion; 22. Resistance rod; 23. Return spring. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Reference Figure 1-11 An embodiment of the present invention provides an auxiliary device for fundus examination, including a support frame 1 and an ophthalmoscope 2 arranged on the support frame 1, the support frame 1 is provided with an inflatable support mechanism, the inflatable support mechanism includes an inflatable cushion 3 and a support assembly, the middle part of the inflatable cushion 3 is fixed on the support frame 1, and the support assembly has a first state in which both ends of the inflatable cushion 3 are attached to the support frame 1 and a second state in which both ends of the inflatable cushion 3 are tilted up to fit the patient's head.

[0022] Specifically, the ophthalmoscope 2 is a professional medical device used to examine the internal structure of the eyeball. When in use, the patient usually sits to be examined. During the process, the patient's head will swing (shake) unconsciously. Obviously, this will affect the observation effect of the ophthalmoscope 2. The innovation of the embodiment of the present invention is that the ophthalmoscope 2 is set on the support frame 1 (the ophthalmoscope 2 can be slidably set on the support frame 1 to bring the ophthalmoscope 2 close to the patient during the examination and move the ophthalmoscope 2 away when idle). The support frame 1 can use the bed structure in the prior art so that the patient can lie on the support frame 1 to be examined by the ophthalmoscope 2; an inflatable cushion 3 and a support assembly are set on the support frame 1. The inflatable cushion 3 can use the inflatable air cushion structure in the prior art, and the support assembly can use the deformable bracket structure in the prior art to force the two ends of the inflatable cushion 3 to tilt up when deformed; with such an arrangement, when needed When performing funduscopy 2 on the patient, the inflatable cushion 3 is inflated and the inflatable support mechanism is in the first state. At this time, the inflatable cushion 3 is attached to the support frame 1, and the patient's head can be rested on the inflatable cushion 3; then the inflatable support mechanism is switched to the second state to force the two ends of the inflatable cushion 3 to be tilted up, so that the inflatable cushion 3 as a whole is attached to the patient's head in an arc shape, so as to increase the supporting force while forcing the patient's head to be in the middle position of the inflatable cushion 3, which is convenient for funduscopy 2 to be examined (if the patient's head is not in the middle position of the inflatable cushion 3, the position of the ophthalmoscope 2 needs to be adjusted to a large extent).

[0023] In another embodiment provided by the present invention, the support frame 1 is further configured with a first inflation channel 4 that communicates with the inflatable cushion 3. Specifically, the first inflation channel 4 can be a pipe structure, embedded in the support frame 1 and connected to the inflatable cushion 3. The support frame 1 is provided with an air source (such as an air pump structure, which is a prior art structure not shown and will not be described here in detail). The output end of the air source is connected to the first inflation channel 4, so that gas can be delivered to or extracted from the inflatable cushion 3 through the air source.

[0024] Furthermore, the support assembly includes a second inflatable channel 5 constructed on the support frame 1, and a support rod 6 is slidably connected in the second inflatable channel 5. The top end of the support rod 6 is limitedly connected to the inflatable cushion 3. Specifically, the second inflatable channel 5 can be a pipe structure, which is embedded in the support frame 1; the second inflatable channel 5 and the support rod 6 are symmetrically arranged in two groups, and the ends of the two inflatable channels away from the corresponding support rod 6 can be merged together to share a common air source (such as Figure 2As shown), that is, in this embodiment, two air sources are provided on the support frame 1, and the two air sources are connected to the first air-inflating channel 4 and the second air-inflating channel 5 respectively; the second air-inflating channel 5 is vertically constructed at one end away from the air source, and one end of the support rod 6 is slidably connected to the vertical part of the second air-inflating channel 5, and a dynamic sealing structure is provided between the two. When the second air-inflating channel 5 is inflated by the air source, the air pressure in the second air-inflating channel 5 increases to force the support rod 6 away from the second air-inflating channel 5, thereby driving the end of the air-inflating cushion 3 to tilt up; when the air in the second air-inflating channel 5 is extracted by the air source, the air pressure in the second air-inflating channel 5 decreases to force the support rod 6 to be retracted into the second air-inflating channel 5, thereby driving the end of the air-inflating cushion 3 to fit onto the surface of the support frame 1. In this way, the state of the air-inflating support mechanism can be controlled by the two air sources to support and restrict the patient's head appropriately, thereby facilitating fundus examination of the patient.

[0025] In the above embodiment, the end of the support rod 6 away from the second inflation channel 5 can be directly fixedly connected to the inflatable cushion 3, so that the end of the inflatable cushion 3 can be driven to tilt up through the support rod 6. Preferably, a fixing plate 7 is fixed on the inflatable cushion 3, and the top end of the support rod 6 is slidably connected to the fixing plate 7. Specifically, a through groove is constructed on the fixing plate 7 along the length direction of the inflatable cushion 3, and a connecting column 8 adapted to the through groove is constructed at the top of the support rod 6, and the connecting column 8 is movably arranged in the through groove; an interlocking groove is constructed on the support frame 1, and when the inflatable cushion 3 is attached to the support frame 1, the fixing plate 7 and the support rod 6 are both located in the interlocking groove, and the connecting column 8 is located at the end of the through groove close to the center of the inflatable cushion 3. When the support rod 6 is moved out of the second inflatable channel 5, the fixing plate 7 and the end of the inflatable cushion 3 can be forced to move up through the support rod 6. During the process, the connecting column 8 moves relatively in the through groove until the support rod 6 moves to the extreme position, and then the connecting column 8 moves relatively to the end of the through groove away from the center of the inflatable cushion 3. At this time, the inflatable cushion 3 is arc-shaped as a whole, and the arc-shaped inflatable cushion 3 can be supported by the support rod 6. The advantage of such a setting is that, when the support rod 6 drives the end of the inflatable cushion 3 to tilt up, the connecting column 8 can move relatively in the through groove to adapt to the movement of the end of the inflatable cushion 3 and the fixed plate 7, and then drive the inflatable cushion 3 to deform to limit the position of the patient's head, so that the patient can cooperate with the ophthalmoscope 2 as much as possible for examination.

[0026] It should be noted that, in each embodiment of the present invention, the inflatable cushion 3 expands along its thickness direction, and the inflatable cushion 3 is prevented from shrinking along its length direction when exhausting, so that the fixing plate 7 can be correspondingly embedded in the fitting groove; in each embodiment of the present invention, when the air pressure in the second inflation channel 5 reaches a certain threshold, the corresponding air source stops running, so that the support rod 6 maintains a certain supporting force (excessive supporting force may cause damage to the patient's head). For patients with different head circumferences, the support rod 6 rises to different heights, and the connecting column 8 is positioned at different positions in the through-groove, so as to adapt to the support and restriction of the head of different patients, and while keeping the patient's head in the middle position of the inflatable cushion 3, try to avoid the patient's head from swinging, and try to avoid the support force of the support rod 6 being too large to cause damage to the patient.

[0027] In another embodiment provided by the present invention, further, a connecting cavity 9 is constructed on the support frame 1, and the first inflation channel 4 and the second inflation channel 5 are both connected to the connecting cavity 9. A sealing plate 10 is slidingly connected in the connecting cavity 9, and the sealing plate 10 has a first position that opens the first inflation channel 4 and blocks the second inflation channel 5 and a second position that blocks the first inflation channel 4 and opens the second inflation channel 5. Specifically, in the above embodiment, two air sources need to be set on the support frame 1 to inflate and exhaust the first inflation channel 4 and the second inflation channel 5 respectively. In this embodiment, a connecting cavity 9 is set on the support frame 1, and the first inflation channel 4 and the second inflation channel 5 are connected through the connecting cavity 9, and then the first inflation channel 4 or the second inflation channel 5 is blocked through the sealing plate 10, so that only one air source is retained on the support frame 1 to be connected to the connecting cavity 9; with such an arrangement, when it is necessary to operate the inflatable cushion 3, the sealing plate 10 is moved to the first position. At this time, the first inflation channel 4 can be inflated or exhausted by the air source to control the operation of the inflatable cushion 3. When it is necessary to operate the support rod 6, the sealing plate 10 is moved to the second position. At this time, the second inflation channel 5 can be inflated or exhausted by the air source to control the end of the inflatable cushion 3 to tilt up or fit the support frame 1.

[0028] Preferably, the blocking plate 10 is constructed with a first hole 11 and a second hole 12, and an elastic member 13 for forcing the blocking plate 10 to move toward one end is provided in the connecting cavity 9. The support frame 1 is constructed with a movable cavity, and a first C-shaped tube 14 communicating with the first inflation channel 4 is provided in the movable cavity. A first limit block 15 is constructed on the blocking plate 10, and the first C-shaped tube 14 extends away from one end of the first inflation channel 4 to the moving range of the first limit block 15. A second C-shaped tube 16 communicating with the second inflation channel 5 is provided in the movable cavity, and a second limit block 17 is constructed on the blocking plate 10, and the second C-shaped tube 16 extends away from one end of the second inflation channel 5 to the moving range of the second limit block 17. Specifically, the movable chamber is connected to the connecting chamber 9, and the blocking plate 10 is located on the side of the connecting chamber 9 close to the movable chamber. When the blocking plate 10 slides along the connecting chamber 9, the blocking plate 10 can keep blocking the connecting chamber 9, and try to avoid the connecting chamber 9 from being connected to the movable chamber (so that the gas source inflates or exhausts the first inflation channel 4 or the second inflation channel 5 through the connecting chamber 9, and tries to avoid gas leakage from the connection between the connecting chamber 9 and the movable chamber), and try to avoid the air pressure in the movable chamber from changing with the change of the connecting chamber 9; a first C-shaped tube 14 and a second C-shaped tube 16 are provided in the movable chamber, and one end of the first C-shaped tube 14 is connected to the first inflation channel 4, and the other end is a blocking end and the blocking end is located in the movable chamber. One end of the second C-shaped tube 16 is connected to the second inflation channel 5, and the other end is a blocking end and the blocking end is located in the active cavity; the blocking plate 10 is constructed with a first limit block 15 and a second limit block 17, and the first limit block 15 and the second limit block 17 are both located in the active cavity; the elastic member 13 can adopt a spring structure in the prior art, one end of which is fixed on the inner wall of the connecting cavity 9, and the other end is fixed on the blocking plate 10, and the spring is in a compressed state to force the blocking plate 10 to move in the connecting cavity 9; the blocking plate 10 can fit on the end heads of the first inflation channel 4 and the second inflation channel 5 when sliding along the connecting cavity 9. If the inflation channel corresponds to the hole on the blocking plate 10, the corresponding inflation channel is opened.

[0029] Both the first and second C-shaped tubes 14, 16 are elastic and deform when the air pressure within them changes. Specifically, the first and second C-shaped tubes 14, 16 are C-shaped tubes, each C-shaped overall, hollow inside, and elliptical (or flat) in cross-section. As the pressure within the C-shaped tube increases, its cross-section gradually expands and approaches a circular shape, causing the C-shaped tube to deform closer to a cylindrical shape. Conversely, as the pressure within the C-shaped tube decreases, the C-shaped tube returns to its original C-shape due to its own elastic force, and its cross-section also returns to its original elliptical or flat shape. This allows the blocked end of the C-shaped tube to move in a manner related to the pressure.

[0030] The blocking plate 10 has a first position, a second position and a third position (eg, Figure 4-6 The figure shows a schematic diagram of the blocking plate 10 in the first position, the second position and the third position. Other redundant structures are omitted in the figure, and only part of the support frame 1 and part of the connecting cavity 9 are shown. The overall connecting cavity 9 is a closed cavity connected to the air source, and is then controlled by the blocking plate 10 to connect with the first inflation channel 4 and the second inflation channel 5). That is, when the blocking plate 10 is away from the elastic member 13 in the connecting cavity 9, it passes through the first position, the second position and the third position in sequence; in the first position, the first limit block 15 and the first C-shaped tube 14 abut against each other, and the blocking plate 10 cannot continue to move along the connecting cavity 9 under the elastic force of the elastic member 13. At this time, the third position A hole 11 is connected to the first inflation channel 4, and the second hole 12 is misaligned with the second inflation channel 5, that is, the blocking plate 10 opens the first inflation channel 4 and blocks the second inflation channel 5; when the connecting cavity 9 and the first inflation channel 4 are inflated through the air source, the inflatable cushion 3 expands, the air pressure in the first inflation channel 4 increases, and the first C-shaped tube 14 is deformed to drive its blocking end to be misaligned with the first limit block 15 (after the inflatable cushion 3 is inflated, there is a certain air pressure inside it. When the air pressure in the first inflation channel 4 reaches a certain threshold, the first C-shaped tube 14 is misaligned with the first limit block 15), so that the blocking plate 10 can be When the sealing plate 10 moves to the second position, the second limit block 17 contacts the blocking end of the second C-shaped tube 16, and the elastic member 13 can no longer drive the sealing plate 10 to move along the connecting cavity 9. At this time, the first hole 11 and the first inflation channel 4 are misaligned, and the second hole 12 and the second inflation channel 5 are connected, that is, the sealing plate 10 blocks the first inflation channel 4 and opens the second inflation channel 5. When the connecting cavity 9 and the second inflation channel 5 are inflated through the air source, the support rod 6 moves away from the second inflation channel 5 to force the two ends of the inflatable cushion 3 to tilt up. As the air pressure in the second inflation channel 5 increases, the second C-shaped tube 16 gradually It gradually deforms until it separates from the second limit block 17 (when the air pressure in the second inflation channel 5 reaches a certain threshold, the second C-shaped tube 16 is misaligned with the second limit block 17). After the second C-shaped tube 16 is misaligned with the second limit block 17, the blocking plate 10 moves to the third position under the action of the elastic member 13; when the blocking plate 10 moves to the third position, the first hole 11 and the first inflation channel 4 are misaligned, and the second hole 12 and the second inflation channel 5 are misaligned. At this time, the first inflation channel 4 and the second inflation channel 5 can be blocked at the same time by the blocking plate 10, and the inflatable cushion 3 is kept in an arc shape as much as possible to support and limit the patient's head.

[0031] The advantage of such a setting is that by arranging an air source on the support frame 1, the position of the sealing plate 10 can be passively switched to make the sealing plate 10 in different states, so that the air source can first inflate the inflatable cushion 3, and when the air pressure in the inflatable cushion 3 reaches a threshold, the position of the sealing plate 10 is passively switched to inflate the second inflatable channel 5 separately, until the air pressure in the second inflatable channel 5 reaches a threshold, and the first inflatable channel 4 and the second inflatable channel 5 are passively blocked to keep the inflatable cushion 3 in its state.

[0032] It should be noted that two L-shaped stops 18 are constructed in the movable cavity. When the first limit block 15 and the second limit block 17 move with the sealing plate 10, the two L-shaped stops 18 do not interfere with the first limit block 15 and the second limit block 17; the two L-shaped stops 18 are respectively fitted with the first C-shaped tube 14 and the second C-shaped tube 16. When the first C-shaped tube 14 conflicts with the first limit block 15, one L-shaped stop 18 is located on the side of the first C-shaped tube 14 away from the first limit block 15 to support the first C-shaped tube 14 so that the first C-shaped tube 14 can be deformed by fitting with the L-shaped stop 18, and try to avoid the first C-shaped tube 14 from being displaced in position due to the conflict of the first limit block 15; similarly, the other L-shaped stop 18 is used to conflict with the second C-shaped tube 16, and try to avoid the second C-shaped tube 16 from being displaced in position due to the conflict of the second limit block 17.

[0033] A push rod 19 structure can be provided in the connecting cavity 9, one end of the push rod 19 is fixed to the inner wall of the connecting cavity 9, and the other end can resist the blocking plate 10, so that when the push rod 19 is extended, the blocking plate 10 is forced to move along the connecting cavity 9 close to the elastic member 13 (such as Figure 7 As shown, the blocking plate 10 is in the first position, and the push rod 19 does not interfere with the blocking plate 10 when it is contracted. When the push rod 19 is extended, it can resist the blocking plate 10 and return to the first position along the connecting cavity 9); optionally, an extension portion can be constructed on the blocking plate 10, and the extension portion extends to the outside of the support frame 1, so that the user can manipulate the extension portion to drive the blocking plate 10 close to the elastic member 13.

[0034] In another embodiment provided by the present invention, further, a third hole 20 is constructed on the blocking plate 10. Specifically, the third hole 20 is located on the side of the second hole 12 away from the first hole 11. In this embodiment, the blocking plate 10 has three holes, and the blocking plate 10 has a fourth position in the connecting cavity 9. When the blocking plate 10 is in the third position, it can be further slid along the connecting cavity 9 by the action of the elastic member 13 until the blocking plate 10 hits the inner wall of the connecting cavity 9. The blocking plate 10 is in the fourth position. At this time, the second hole 12 is connected to the first inflation channel 4, and the third hole 20 is connected to the second inflation channel 5. When the blocking plate 10 is in the fourth position, the gas in the first inflation channel 4 and the second inflation channel 5 can be simultaneously sucked through the air source to make the inflatable cushion 3 shrink and fit onto the support frame 1, so as to avoid the inflatable cushion 3 being in a high-pressure state for a long time.

[0035] The blocking plate 10 is provided with a raised portion 21, and a connecting groove is provided on the raised portion 21. The two ends of the connecting groove are respectively connected to the connecting cavity 9 and the active cavity. A resisting rod 22 is provided in the connecting groove for sliding. A dynamic sealing structure is provided between the resisting rod 22 and the connecting groove. A return spring 23 is provided in the connecting groove. One end of the return spring 23 is fixed to the inner wall of the connecting groove, and the other end is fixed to the resisting rod 22, so that the resisting rod 22 is forced to move toward the side of the active cavity through the return spring 23. When the blocking plate 10 is in the first position and the second position, the return spring 23 is provided. When the blocking plate 10 is in the third position, the contact rod 22 contacts the inner wall of the connecting chamber 9, so that the contact rod 22 squeezes the return spring 23 and is retracted into the connecting groove. When the blocking plate 10 moves to the third position, the connecting groove moves to the position corresponding to the second inflation channel 5. At this time, the contact rod 22 can extend out of the connecting groove under the action of the return spring 23 until the blocking plate 10 moves to the third position. The contact rod 22 is snapped onto the inner wall of the second inflation channel 5, thereby limiting the position of the blocking plate 10. When the blocking plate 10 is in the third position When the air pressure difference between the first and second air-inflating passages 4 and 5 is large, the air pressure difference between the first and second air-inflating passages 4 and 5 is large, and ...

[0036] The advantage of such a setting is that the gas in the connecting cavity 9 is directly sucked by the air source, so that the sealing plate 10 can be passively switched to the fourth position to passively open the first inflation channel 4 and the second inflation channel 5 until the inflatable cushion 3 is first and fits onto the support frame 1. The sealing plate 10 can be driven to reset to the first position by the push rod 19, so that the air source can be directly operated next time to adapt to the support and restriction of the heads of different patients.

[0037] It should be noted that the first limiting block, the second limiting block and the abutting rod 22 are all constructed with a wedge-shaped surface (such as Figure 11 As shown), when the blocking plate 10 is forced to reset to the first position by the push rod 19, the first wedge block (the second wedge block) can force the blocking end of the first C-shaped tube 14 (the second C-shaped tube 16) to avoid through the wedge surface, so that the first limit block 15 and the second limit block 17 are reset; accordingly, when the blocking plate 10 is reset to the first position, the wedge surface of the interference rod 22 and the inner wall of the second inflation channel 5 conflict with each other, so as to force the interference rod 22 to be retracted into the connecting groove (preferably, the interference rod 22 and the connecting groove can be constructed as mutually compatible non-rotating bodies to avoid the interference rod 22 rotating and causing the wedge surface to deflect).

[0038] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A fundus examination auxiliary device, comprising a support frame and an ophthalmoscope arranged on the support frame, characterized in that: The support frame is provided with: The inflatable support mechanism comprises an inflatable cushion and a support assembly, wherein the middle portion of the inflatable cushion is fixed on a support frame, and the support assembly has a first state in which both ends of the inflatable cushion are fitted on the support frame and a second state in which both ends of the inflatable cushion are lifted up to fit the patient's head.

2. The fundus examination auxiliary device according to claim 1, characterized in that: The support frame is provided with a first inflation channel which is in communication with the inflation cushion.

3. The fundus examination auxiliary device according to claim 2, characterized in that: The support assembly comprises a second air-filling channel constructed on the support frame, a support rod is slidably connected in the second air-filling channel, and the top end of the support rod is limitedly connected to the air cushion.

4. The fundus examination auxiliary device according to claim 1, characterized in that: A fixing plate is fixed on the inflatable cushion, and the top end of the support rod is slidably connected to the fixing plate.

5. The fundus examination auxiliary device according to claim 3, characterized in that: A connecting cavity is constructed on the support frame, the first inflation channel and the second inflation channel are both connected to the connecting cavity, and a sealing plate is slidably connected in the connecting cavity. The sealing plate has a first position that opens the first inflation channel and blocks the second inflation channel and a second position that blocks the first inflation channel and opens the second inflation channel.

6. The fundus examination auxiliary device according to claim 5, characterized in that: The blocking plate is configured with a first hole and a second hole, and the connecting cavity is provided with an elastic member for forcing the blocking plate to move toward one end.

7. The fundus examination auxiliary device according to claim 5, characterized in that: The support frame is provided with an active cavity, in which a first C-shaped tube connected with the first inflation channel is arranged, and a first limit block is constructed on the blocking plate, and one end of the first C-shaped tube away from the first inflation channel extends to the moving stroke of the first limit block.

8. The fundus examination auxiliary device according to claim 7, characterized in that: A second C-shaped tube connected to the second inflation channel is arranged in the movable cavity, a second limit block is constructed on the blocking plate, and one end of the second C-shaped tube away from the second inflation channel extends to the moving stroke of the second limit block.

9. The fundus examination auxiliary device according to claim 7, characterized in that: The first C-shaped tube and the second C-shaped tube are both elastic and will deform when the air pressure inside them changes.

10. The fundus examination auxiliary device according to claim 6, characterized in that: The blocking plate is also provided with a third hole.

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