An auxiliary device for fundus examination

Abstract

The present invention discloses an auxiliary device for fundus examination, which relates to the technical field of fundus examination, and comprises a support frame and an ophthalmoscope arranged on the support frame, wherein the support frame is provided with an inflatable support mechanism, and the inflatable support mechanism comprises an inflatable cushion and a support assembly, wherein the middle part of the inflatable cushion is fixed on the 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 tilted to fit the patient's head. The auxiliary device for fundus examination provided by the present invention, when preparing to examine a patient, the support assembly switches to the first state in which the inflatable cushion is fitted on the support frame, at which time the patient can lie on the support frame and rest his head on the inflatable cushion, and then the support assembly switches to the second state in which both ends of the inflatable cushion are tilted, thereby making the inflatable cushion fit the patient's head to restrict the patient's head and try to avoid the patient's head from swinging when being examined.

Description

Technical Field

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

[0002] Fundus examination is a medical examination method for observing the internal structure of the eyeball (such as the retina, optic nerve, blood vessels, etc.) through professional equipment, mainly used to evaluate eye health and detect early lesions of systemic diseases (such as diabetes, hypertension).

[0003] For example, in the patent document with the authorization announcement number CN221577672U, the authorization announcement date of August 23, 2024, and the name of "A Head Stabilizing Device for Eye Examination", it includes a bottom plate, on the top surface of which an examination device and a support base are installed. A support frame is installed on the top of the support base, and a mandibular support and a forehead support are arranged between the support frames. This patent can fixedly support the back of the patient's head through the setting of the pillow support, making the fixation of the patient's head more stable, making the examination results more accurate, and improving the examination efficiency.

[0004] In the prior art, patients generally sit for funduscopic examination. Obviously, in this examination method, the patient's head is prone to swing and other situations, affecting the observation of the patient's eyes by medical staff. Summary of the Invention

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

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An auxiliary device for fundus examination, including a support frame and an ophthalmoscope arranged on the support frame, and the following are arranged on the support frame:

[0008] An inflatable support mechanism, which includes an inflatable pad and a support component. The middle part of the inflatable pad is fixed on the support frame, and the support component has a first state in which both ends of the inflatable pad are attached to the support frame and a second state in which both ends of the inflatable pad are lifted to fit the patient's head.

[0009] In the above-mentioned auxiliary device for fundus examination, a first inflation channel communicating with the inflatable pad is constructed on the support frame.

[0010] In the above-mentioned auxiliary device for fundus examination, the support component 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 connected to the inflatable pad in a limited manner.

[0011] In the above-mentioned auxiliary device for fundus examination, a fixing plate is fixed on the inflatable pad, and the top end of the support rod is slidably connected to the fixing plate.

[0012] In the above-mentioned fundus examination auxiliary device, 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, 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.

[0013] In the above-mentioned 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 arranged in the connecting cavity.

[0014] In the above-mentioned fundus examination auxiliary device, a movable cavity is constructed on the support frame, a first C-shaped tube connected to the first inflation channel is arranged 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.

[0015] In the above-mentioned fundus examination auxiliary device, 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 the end of the second C-shaped tube away from the second inflation channel extends to the moving range of the second limit block.

[0016] In the above fundus examination auxiliary device, the first C-shaped tube and the second C-shaped tube are both elastic and will deform when the air pressure inside them changes.

[0017] In the above fundus examination auxiliary device, a third hole is also configured on the blocking plate.

[0018] In the above technical scheme, the present invention provides a fundus examination auxiliary device. 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 rise up, 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

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the fixing plate provided by another embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the support rod provided by another embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the first hole structure provided by another embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the second hole structure provided by another embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the plugging plate provided by another embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the elastic member provided by another embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the L-shaped baffle provided by another embodiment of the present invention;

[0028] Figure 9 Schematic diagram of the convex portion provided by another embodiment of the present invention;

[0029] Figure 10 Schematic diagram of the return spring provided by another embodiment of the present invention;

[0030] Figure 11 Schematic diagram of the abutting rod provided by another embodiment of the present invention.

[0031] Explanation of reference numerals:

[0032] 1, support frame; 2, fundus camera; 3, inflatable pad; 4, first inflation channel; 5, second inflation channel; 6, support rod; 7, fixing plate; 8, connecting column; 9, connecting cavity; 10, plugging plate; 11, first hole; 12, second hole; 13, elastic member; 14, first C-shaped tube; 15, first limiting block; 16, second C-shaped tube; 17, second limiting block; 18, L-shaped block; 19, push rod; 20, third hole; 21, convex portion; 22, abutting rod; 23, return spring. Detailed implementation manners

[0033] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below with reference to the accompanying drawings.

[0034] Refer to Figures 1-11, an embodiment of the present invention provides a fundus examination assistance device, including a support frame 1 and an ophthalmoscope 2 provided on the support frame 1. An inflatable support mechanism is provided on the support frame 1, and the inflatable support mechanism includes an inflatable pad 3 and a support assembly. The middle of the inflatable pad 3 is fixed on the support frame 1, and the support assembly has a first state in which both ends of the inflatable pad 3 are attached to the support frame 1 and a second state in which both ends of the inflatable pad 3 are lifted to fit the patient's head.

[0035] Specifically, the ophthalmoscope 2 is a professional medical device for examining the internal structure of the eyeball. When in use, the patient generally sits for the examination. During the process, the patient's head will involuntarily swing (shake). Obviously, this will affect the observation effect of the ophthalmoscope 2. The innovation of the embodiment of the present invention lies in that the ophthalmoscope 2 is provided on the support frame 1 (the ophthalmoscope 2 can be slidably arranged on the support frame 1 to bring the ophthalmoscope 2 closer to the patient during the examination and move the ophthalmoscope 2 away when not in use). The support frame 1 can be selected from the bed body structure in the prior art, so that the patient can lie on the support frame 1 to receive the examination of the ophthalmoscope 2; an inflatable pad 3 and a support assembly are provided on the support frame 1. The inflatable pad 3 can be selected from the inflatable air cushion structure in the prior art, and the support assembly can be selected from the deformable bracket structure in the prior art to force both ends of the inflatable pad 3 to lift when deforming; thus arranged, when it is necessary to examine the patient with the ophthalmoscope 2, the inflatable pad 3 is inflated and the inflatable support mechanism is in the first state. At this time, the inflatable pad 3 is attached to the support frame 1, and the patient's head can rest on the inflatable pad 3; then the inflatable support mechanism is switched to the second state to force both ends of the inflatable pad 3 to lift, so that the whole inflatable pad 3 is arc-shaped and attached to the patient's head, so as to improve the supporting force and force the patient's head to be in the middle position of the inflatable pad 3, which is convenient for the ophthalmoscope 2 to conduct the examination (if the patient's head is not in the middle position of the inflatable pad 3, the position of the ophthalmoscope 2 needs to be adjusted greatly).

[0036] In another embodiment provided by the present invention, further, a first inflation channel 4 communicating with the inflatable pad 3 is constructed on the support frame 1. Specifically, the first inflation channel 4 can be selected from a pipeline structure, which is embedded in the support frame 1 and communicates with the inflatable pad 3; a gas source (such as an air pump structure, which is the prior art and not shown here and will not be elaborated) is provided on the support frame 1, and the output end of the gas source is communicated with the first inflation channel 4 to deliver gas into the inflatable pad 3 or extract gas from the inflatable pad 3 through the gas source.

[0037] Further, the support assembly includes a second inflation channel 5 constructed on the support frame 1. A support rod 6 is slidably connected within the second inflation channel 5, and the top end of the support rod 6 is connected to the inflatable pad 3 in a limiting manner. Specifically, the second inflation channel 5 can be a pipe structure, which is embedded in the support frame 1; there are two sets of symmetrically arranged structures for the second inflation channel 5 and the support rod 6. The ends of the two inflation channels away from the corresponding support rods 6 can be combined together to share a common air source (such as Figure 2 shown), that is, in this embodiment, there are two air sources on the support frame 1, and the two air sources are respectively connected to the first inflation channel 4 and the second inflation channel 5; the end of the second inflation channel 5 away from the air source is vertically constructed, and one end of the support rod 6 is slidably connected in the vertical part of the second inflation channel 5, and a dynamic sealing structure is provided between the two. When inflating the second inflation channel 5 through the air source, the air pressure in the second inflation channel 5 increases to force the support rod 6 away from the second inflation channel 5, thereby driving the end of the inflatable pad 3 to tilt up; when extracting the gas in the second inflation channel 5 through the air source, the air pressure in the second inflation channel 5 decreases to force the support rod 6 to retract into the second inflation channel 5, thereby driving the end of the inflatable pad 3 to fit on the surface of the support frame 1. In this way, the state of the inflatable support mechanism can be controlled through the two air sources to adapt to the support and restriction of the patient's head, facilitating fundus examination of the patient.

[0038] In the above embodiment, the end of the support rod 6 away from the second inflation channel 5 and the inflatable pad 3 can be directly fixedly connected to drive the end of the inflatable pad 3 to tilt up through the support rod 6. Preferably, a fixing plate 7 is fixed on the inflatable pad 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 pad 3, and a connecting column 8 adapted to the through groove is constructed at the top end of the support rod 6. The connecting column 8 is movably arranged in the through groove; a fitting groove is constructed on the support frame 1. When the inflatable pad 3 fits on the support frame 1, both the fixing plate 7 and the support rod 6 are located in the fitting groove, and the connecting column 8 is located at one end of the through groove close to the center of the inflatable pad 3. When the support rod 6 moves out of the second inflation channel 5, the support rod 6 can force the fixing plate 7 and the end of the inflatable pad 3 to move upward. During the process, the connecting column 8 moves relative to the through groove until the support rod 6 moves to the limit position, and then the connecting column 8 moves relative to the through groove to the end away from the center of the inflatable pad 3. At this time, the inflatable pad 3 is in an arc shape as a whole, and the support rod 6 can support the arc-shaped inflatable pad 3. The advantage of such a setting is that during the process of the support rod 6 driving the end of the inflatable pad 3 to tilt up, the connecting column 8 can move relative to the through groove to adapt to the movement of the end of the inflatable pad 3 and the fixing plate 7, and then adapt to drive the inflatable pad 3 to deform to limit the position of the patient's head, so that the patient can cooperate with the fundus microscope 2 for examination as much as possible.

[0039] It should be noted that in each embodiment of the present invention, the inflatable cushion 3 expands in its thickness direction to avoid, as much as possible, the inflatable cushion 3 contracting in its length direction during exhaust, so that the fixing plate 7 can be correspondingly inserted into 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 operating to enable the support rod 6 to maintain a certain supporting force (too large a supporting force may cause harm to the patient's head). For patients with different head circumferences, the rising height of the support rod 6 is different, and the position of the connecting column 8 in the through groove is different, so as to adapt to support and limit the heads of different patients, while keeping the patient's head in the middle position of the inflatable cushion 3 and avoiding, as much as possible, the patient's head from swinging, and avoiding, as much as possible, the supporting force of the support rod 6 being too large and causing harm to the patient.

[0040] In another embodiment provided by the present invention, further, a connection cavity 9 is constructed on the support frame 1, the first inflation channel 4 and the second inflation channel 5 are both communicated with the connection cavity 9, and a blocking plate 10 is slidably connected in the connection cavity 9. The blocking plate 10 has a first position for opening the first inflation channel 4 and blocking the second inflation channel 5 and a second position for blocking the first inflation channel 4 and opening the second inflation channel 5. Specifically, in the above embodiment, two air sources need to be provided on the support frame 1 to respectively inflate and exhaust the first inflation channel 4 and the second inflation channel 5. In this embodiment, a connection cavity 9 is provided on the support frame 1, the first inflation channel 4 and the second inflation channel 5 are communicated through the connection cavity 9, and then the first inflation channel 4 or the second inflation channel 5 is blocked by the blocking plate 10, so that only one air source on the support frame 1 needs to be connected to the connection cavity 9; with such a setting, when the inflatable cushion 3 needs to be operated, the blocking plate 10 is moved to the first position, and at this time, the first inflation channel 4 can be inflated or exhausted through the air source to control the operation of the inflatable cushion 3. When the support rod 6 needs to be operated, the blocking plate 10 is moved to the second position, and at this time, the second inflation channel 5 can be inflated or exhausted through the air source to control the end of the inflatable cushion 3 to tilt up or fit the support frame 1.

[0041] Preferably, a first hole 11 and a second hole 12 are formed in the plugging plate 10, and an elastic member 13 for forcing the plugging plate 10 to move towards one end is arranged in the connection cavity 9. An activity cavity is formed in the support frame 1, and a first C-shaped pipe 14 communicated with the first inflation channel 4 is arranged in the activity cavity. A first limiting block 15 is formed on the plugging plate 10, and one end of the first C-shaped pipe 14 away from the first inflation channel 4 extends to the moving stroke of the first limiting block 15. A second C-shaped pipe 16 communicated with the second inflation channel 5 is arranged in the activity cavity. A second limiting block 17 is formed on the plugging plate 10, and one end of the second C-shaped pipe 16 away from the second inflation channel 5 extends to the moving stroke of the second limiting block 17. Specifically, the activity cavity is communicated with the connection cavity 9, and the plugging plate 10 is located on the side of the connection cavity 9 close to the activity cavity. During the process of the plugging plate 10 sliding along the connection cavity 9, the plugging plate 10 can keep plugging the connection cavity 9, and try to avoid the connection between the connection cavity 9 and the activity cavity (so that the air source inflates or exhausts the first inflation channel 4 or the second inflation channel 5 through the connection cavity 9, and try to avoid the leakage of gas from the connection part of the connection cavity 9 and the activity cavity), and try to avoid the air pressure in the activity cavity changing with the change of the connection cavity 9; a first C-shaped pipe 14 and a second C-shaped pipe 16 are arranged in the activity cavity. One end of the first C-shaped pipe 14 is communicated with the first inflation channel 4, and the other end is a plugging end and the plugging end is located in the activity cavity. One end of the second C-shaped pipe 16 is communicated with the second inflation channel 5, and the other end is a plugging end and the plugging end is located in the activity cavity; a first limiting block 15 and a second limiting block 17 are formed on the plugging plate 10, and both the first limiting block 15 and the second limiting block 17 are located in the activity cavity; the elastic member 13 can be a spring structure in the prior art, one end of which is fixed on the inner wall of the connection cavity 9, and the other end is fixed on the plugging plate 10. The spring is in a compressed state to force the plugging plate 10 to move in the connection cavity 9; when the plugging plate 10 slides along the connection cavity 9, it can fit on the ends of the first inflation channel 4 and the second inflation channel 5. If the inflation channel corresponds to the hole on the plugging plate 10, the corresponding inflation channel is opened.

[0042] Both the first C-shaped pipe 14 and the second C-shaped pipe 16 are elastic and will deform when the air pressure in them changes. Specifically, both the first C-shaped pipe 14 and the second C-shaped pipe 16 are C-shaped pipes. The C-shaped pipe is integrally C-shaped, its interior is hollow and the cross-section structure is oval (or flat). When the pressure value inside the C-shaped pipe increases, its cross-section gradually expands and approaches a circle, so that the C-shaped pipe will approach to deform into a cylindrical shape; conversely, when the pressure value inside the C-shaped pipe decreases, the C-shaped pipe will reset to the original C shape by its own elastic force, and at the same time its cross-section will also reset to the original oval or flat shape, so that the plugging end of the C-shaped pipe moves in a certain relationship with the size of the pressure value.

[0043] The blocking plate 10 has a first position, a second position, and a third position in the connection cavity 9 that are gradually away from the elastic member 13 (as Figures 4-6 shown in the schematic diagrams of the blocking plate 10 in the first position, the second position, and the third position. In the figures, other redundant structures are omitted, and only part of the support frame 1 and part of the connection cavity 9 are shown. The overall connection cavity 9 is a closed cavity connected to a gas source, and is then controlled by the blocking plate 10 to communicate with the first inflation channel 4 and the second inflation channel 5), that is, when the blocking plate 10 moves away from the elastic member 13 in the connection cavity 9, it sequentially passes through the first position, the second position, and the third position; in the first position, the first limiting block 15 abuts against the first C-shaped tube 14, and the blocking plate 10 cannot continue to move along the connection cavity 9 under the elastic force of the elastic member 13. At this time, the first hole 11 communicates with the first inflation channel 4, and the second hole 12 and the second inflation channel 5 are misaligned, that is, the blocking plate 10 opens the first inflation channel 4 and blocks the second inflation channel 5; when inflating the connection cavity 9 and the first inflation channel 4 through a gas source, the inflatable pad 3 expands, and the air pressure in the first inflation channel 4 increases. The first C-shaped tube 14 deforms to drive its blocking end to be misaligned with the first limiting block 15 (after the inflatable pad 3 inflates and expands, it has a certain air pressure inside. 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 limiting block 15), so that the blocking plate 10 can move towards the second position under the action of the elastic member 13; when the blocking plate 10 moves to the second position, the second limiting block 17 abuts against the blocking end of the second C-shaped tube 16, and the elastic member 13 cannot continue to drive the blocking plate 10 to move along the connection 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 communicate, that is, the blocking plate 10 blocks the first inflation channel 4 and opens the second inflation channel 5; when inflating the connection cavity 9 and the second inflation channel 5 through a gas source, the support rod 6 moves away from the second inflation channel 5 to force both ends of the inflatable pad 3 to tilt up. As the air pressure in the second inflation channel 5 increases, the second C-shaped tube 16 gradually deforms until it separates from the second limiting 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 limiting block 17). After the second C-shaped tube 16 is misaligned with the second limiting block 17, the blocking plate 10 moves towards 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 simultaneously through the blocking plate 10, and the inflatable pad 3 is preferably kept in an arc shape to support and limit the patient's head.

[0044] The advantage of such a setting is that by providing a gas source on the support frame 1, the position of the plugging plate 10 can be switched passively, enabling the plugging plate 10 to be in different states. The gas source can first inflate the inflatable cushion 3. When the air pressure in the inflatable cushion 3 reaches the threshold, the position of the plugging plate 10 is switched passively to inflate the second inflation channel 5 alone until the air pressure in the second inflation channel 5 reaches the threshold, and then the first inflation channel 4 and the second inflation channel 5 are plugged passively to keep the inflatable cushion 3 in a certain state.

[0045] It should be noted that there are two L-shaped stoppers 18 constructed in the movable cavity. During the movement of the first limiting block 15 and the second limiting block 17 along with the plugging plate 10, the two L-shaped stoppers 18 do not interfere with the first limiting block 15 and the second limiting block 17. The two L-shaped stoppers 18 are respectively in contact with the first C-shaped tube 14 and the second C-shaped tube 16. When the first C-shaped tube 14 abuts against the first limiting block 15, one L-shaped stopper 18 is located on the side of the first C-shaped tube 14 away from the first limiting block 15 to support the first C-shaped tube 14, enabling the first C-shaped tube 14 to deform in contact with the L-shaped stopper 18 and minimizing the deviation of the position of the first C-shaped tube 14 due to the abutment of the first limiting block 15. Similarly, the other L-shaped stopper 18 is used to abut against the second C-shaped tube 16 to minimize the deviation of the position of the second C-shaped tube 16 due to the abutment of the second limiting block 17.

[0046] A push rod 19 structure can be provided in the connection cavity 9. One end of the push rod 19 is fixed to the inner wall of the connection cavity 9, and the other end can abut against the plugging plate 10 to force the plugging plate 10 to move along the connection cavity 9 towards the elastic member 13 when the push rod 19 extends (as Figure 7 shown, when the plugging plate 10 is in the first position, the push rod 19 does not interfere with the plugging plate 10 when it contracts, and the push rod 19 can abut against the plugging plate 10 to reset it to the first position along the connection cavity 9 when it extends); Optionally, an extension portion can be constructed on the plugging plate 10, and the extension portion extends outside the support frame 1, enabling the user to control the extension portion to drive the plugging plate 10 towards the elastic member 13.

[0047] 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 gas source, so that the inflatable cushion 3 shrinks and fits onto the support frame 1, and the inflatable cushion 3 is prevented from being in a high-pressure state for a long time as much as possible.

[0048] The blocking plate 10 is provided with a protrusion 21, and a connecting groove is provided on the protrusion 21. The two ends of the connecting groove are respectively connected with the connecting cavity 9 and the movable cavity. A resisting rod 22 is slidably arranged in the connecting groove. A dynamic sealing structure is arranged between the resisting rod 22 and the connecting groove. A reset spring 23 is arranged in the connecting groove. One end of the reset 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 movable cavity through the reset spring 23. When the blocking plate 10 is in the first position and the second position, the 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. When 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-inflating passage 5 overcomes the air pressure of the return spring 23 and is retracted into the connecting groove. At this time, the air-inflating passage 5 is released and the air-inflating passage 5 is opened. When the air source is used to draw the air in the connecting cavity 9, the air-blocking plate 10 is in the third position to block the first and second air-inflating passages 4 and 5, so that the air source can only draw the air in the connecting cavity 9 to make the connecting cavity 9 under negative pressure. When the air pressure difference between the connecting cavity 9 and the second air-inflating passage 5 is large, the air-inflating passage 22 overcomes the elastic force of the return spring 23 and is retracted into the connecting groove under the action of the air pressure difference. At this time, the air-blocking plate 10 is released and can move to the fourth position under the action of the elastic member 13 to open the first and second air-inflating passages 4 and 5 at the same time, so as to draw the air in the first and second air-inflating passages 4 and 5 at the same time through the air source, thereby making the air-inflating passage 3 deflate and fit onto the support frame 1.

[0049] The advantage of such a configuration is that by directly sucking the gas in the connecting cavity 9 through the air source, 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 installed and attached to the support frame 1. The sealing plate 10 can be 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.

[0050] It should be noted that the first limiting block, the second limiting block and the abutting rod 22 are all configured 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 resistance rod 22 and the inner wall of the second inflation channel 5 are in conflict with each other, so as to force the resistance rod 22 to be retracted into the connecting groove again (preferably, the resistance rod 22 and the connecting groove can be constructed as mutually compatible non-rotating bodies to avoid the rotation of the resistance rod 22 and drive the wedge surface to deflect).

[0051] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An auxiliary device for fundus examination, comprising a support frame and an ophthalmoscope arranged on the support frame, characterized in that, The support frame is provided with: An inflatable support mechanism, which includes an inflatable pad and a support component. The middle of the inflatable pad is fixed on the support frame. The support component has a first state in which both ends of the inflatable pad are attached to the support frame and a second state in which both ends of the inflatable pad are lifted to conform to the patient's head; A first inflation passage communicating with the inflatable pad is constructed on the support frame; The support component includes a second inflation passage constructed on the support frame. A support rod is slidably connected in the second inflation passage, and the top end of the support rod is connected to the inflatable pad in a limiting manner; A connection cavity is constructed on the support frame. The first inflation passage and the second inflation passage are both communicated with the connection cavity, and a blocking plate is slidably connected in the connection cavity; A first hole and a second hole are constructed on the blocking plate, and an elastic member for forcing the blocking plate to move towards one end is arranged in the connection cavity; An activity cavity is constructed on the support frame. A first C-shaped tube communicating with the first inflation passage is arranged in the activity cavity, and a first limiting block is constructed on the blocking plate; A second C-shaped tube communicating with the second inflation passage is arranged in the activity cavity, and a second limiting block is constructed on the blocking plate; Both the first C-shaped tube and the second C-shaped tube are elastic and will deform when the air pressure in them changes; When the first limiting block abuts against the first C-shaped tube, the first hole communicates with the first inflation passage, and the second hole and the second inflation passage are misaligned; when inflating the connection cavity, the first C-shaped tube deforms to be misaligned with the first limiting block, so that the blocking plate can move under the action of the elastic member to make the second limiting block abut against the second C-shaped tube. At this time, the first hole and the first inflation passage are misaligned, and the second hole and the second inflation passage communicate; as the air pressure in the second inflation passage increases, the second C-shaped tube gradually deforms until it separates from the second limiting block.

2. The fundus examination assisting device according to claim 1, wherein A fixing plate is fixed on the inflatable pad, and the top end of the support rod is slidably connected to the fixing plate.

3. An auxiliary device for fundus examination according to claim 1, characterized in that, A third hole is also constructed on the blocking plate.

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