Suprachoroidal space injection device

Abstract

The invention discloses a suprachoroidal space injection device, and relates to the technical field of injection devices. The injection device comprises a silica gel ring, a mounting head base, a needle tube, a needle seat, a rubber plug, a first injector, a first core rod, a second injector and a second core rod. When the silica gel ring is attached to the eyeball, the first injector is pulled out of the second injector, negative pressure is generated in the air exhaust cavity to enable the silica gel ring to be adsorbed to the eyeball, the needle tip of the needle tube punctures the sclera of the eyeball to the choroid, the first core rod is pushed into the first injector, and the first core rod is pushed into the second injector. The rubber plug injects liquid medicine in the medicine injection cavity between the sclera and the choroid of an eyeball, so that the suprachoroidal space injection device can be fixed to the eyeball in an adsorption mode, and the length, stretching out of the mounting head base, of the needle tip of the needle tube can limit the depth of the needle tip of the needle tube for puncturing the eyeball. The injection depth can be accurately controlled to the choroid, and eyeballs are prevented from being damaged due to dislocation during liquid medicine injection.

Description

Technical Field

[0001] The present application relates to the technical field of injection devices, and in particular to a suprachoroidal space injection device. Background Art

[0002] The injection device lacks an adsorption syringe for the eyeball, which makes it difficult to adsorb and fix it to the eyeball, causing it to be easily dislocated and seriously damage the eyeball when injecting medicine. Moreover, when injecting medicine into the eyeball, it is difficult to achieve the precise control of the injection depth so that the needle tip of the syringe can pierce the sclera of the eyeball to the choroid, making it difficult to inject medicine into the choroid of the eyeball. Summary of the invention

[0003] An embodiment of the present application provides a suprachoroidal space injection device, which is used to solve the technical problem of being adsorbed and fixed to the eyeball when injecting medicine into the choroid of the eyeball, accurately controlling the injection depth to the choroid, and avoiding dislocation and serious damage to the eyeball during the injection of medicine.

[0004] The embodiment of the present application provides a suprachoroidal space injection device, including a silicone ring, a mounting head base, a needle tube, a needle seat, a rubber plug, a first syringe, a first core rod, a second syringe, and a second core rod; The front end of the first core rod is connected to the rubber plug, the first syringe is provided with a drug injection cavity, the front end of the first core rod extends from the rear end of the first syringe into the drug injection cavity, the rubber plug is sealingly and slidably connected to the drug injection cavity, the needle tube is installed on the needle seat, the needle seat is arranged at the front end of the first syringe, the needle tube is communicated with the drug injection cavity, the needle seat is fixed in the mounting head base, the silicone ring is arranged at the front end of the mounting head base, the needle tip of the needle tube extends out of the mounting head base and is located in the silicone ring, the rear end of the mounting head base is connected to the second syringe and fixes the needle seat, the second syringe is provided with an air extraction cavity, the first syringe is arranged in the air extraction cavity, and the outer wall of the first syringe is sealingly and slidably connected to the air extraction cavity.

[0005] Furthermore, the mounting head base includes a first gear regulating valve and a second gear regulating valve, the second gear regulating valve is arranged in the first gear regulating valve, the needle seat is arranged in the second gear regulating valve, and the silicone ring is arranged on the first gear regulating valve.

[0006] Furthermore, the silicone ring is cylindrical, and a funnel-shaped adsorption groove is provided at the front end of the silicone ring, and the needle tip of the needle tube is located in the funnel-shaped adsorption groove; a matching groove is provided at the rear end of the silicone ring, and a matching protrusion is provided at the front end of the first gear regulating valve, and the matching groove is matched and connected with the matching protrusion.

[0007] Furthermore, the first gear regulating valve is provided with a gear protrusion, a first adjusting thread and an empty groove, the second gear regulating valve is provided with a third sealing ring, a shifting protrusion, a blocking portion and a second adjusting thread, the third sealing ring is fixed to the outer surface of the second gear regulating valve, the second gear regulating valve is sealed and connected to the inner surface of the first gear regulating valve via the third sealing ring, the shifting protrusion is positioned and clamped with the gear protrusion, the second adjusting thread is threadedly connected with the first adjusting thread, the blocking portion is arranged in the empty groove, and the blocking portion is limited to slide in the empty groove.

[0008] Furthermore, a fourth sealing ring is provided on the outer side wall of the needle seat, and the needle seat is sealed and connected to the inner surface of the second gear regulating valve via the fourth sealing ring.

[0009] Furthermore, a ventilation groove structure is provided at the front end of the first syringe, and a sealing thread is provided on the outer side wall of the ventilation groove structure, and the sealing thread is sealingly and slidably connected to the air extraction cavity.

[0010] Furthermore, the suprachoroidal space injection device also includes a limiting guide component, which is fixed on the inner wall of the second syringe; the second core rod is fixed to the inner wall of the limiting guide component, the first syringe slides along the second core rod, and the limiting guide component limits the sliding stroke of the first syringe.

[0011] Furthermore, the inner wall of the limiting guide component is provided with a limiting step, the outer wall of the second core rod is clamped with the limiting step, the outer wall of the second core rod is provided with a second sealing ring, the second sealing ring is sealedly connected to the inner wall of the second syringe, the outer wall of the first syringe is provided with a first sealing ring, and the first syringe is sealedly connected to the inner wall of the second core rod through the first sealing ring.

[0012] Furthermore, the suprachoroidal space injection device also includes an air pressure display device, and the outer wall of the second syringe is also provided with a side wall hole connected to the vacuum chamber, and the air pressure display device is installed on the side wall hole to display the air pressure in the vacuum chamber.

[0013] Furthermore, the pulse air pressure display device includes a passage 1, an adjusting button, a pressure valve, a passage 2 and a digital display, the pressure valve is arranged on the digital display, the adjusting button is arranged on the pressure valve, the passage 1 and the passage 2 are arranged on both sides of the digital display, and the passage 1 is connected to the side wall hole; or the pulse air pressure display device includes a negative pressure indicator.

[0014] The suprachoroidal space injection device provided in the embodiment of the present application, when the silicone ring is attached to the eyeball, the first syringe is pulled out from the second syringe, and negative pressure is generated in the vacuum chamber so that the silicone ring is adsorbed on the eyeball, the needle tip of the needle tube pierces the sclera of the eyeball to the choroid, and the first core rod is pushed into the first syringe. The rubber plug injects the medicine in the drug injection chamber between the sclera and choroid of the eyeball, so that the suprachoroidal space injection device can be adsorbed and fixed to the eyeball, and the length of the needle tip of the needle tube extending beyond the mounting head base can limit the depth of the needle tip of the needle tube piercing the eyeball, and can accurately control the injection depth to the choroid, thereby avoiding dislocation and damage to the eyeball when injecting the medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the suprachoroidal space injection device provided in an embodiment of the present application.

[0017] Figure 2 This is a schematic diagram of the combined structure of the silicone ring and the mounting head base provided in an embodiment of the present application.

[0018] Figure 3 This is a schematic diagram of the structure of a needle tube provided in an embodiment of the present application that punctures the eyeball based on a silicone ring.

[0019] Figure 4 A schematic diagram of the structure of the mounting head base provided in an embodiment of the present application.

[0020] Figure 5 A schematic diagram of the structure of the second gear regulating valve provided in an embodiment of the present application.

[0021] Figure 6 A cross-sectional view of the second gear regulating valve provided in an embodiment of the present application.

[0022] Figure 7 This is a schematic diagram of the structure of the needle tube provided in an embodiment of the present application installed on the needle seat.

[0023] Figure 8 This is a schematic diagram of the combined structure of the rubber stopper, the first syringe, and the first core rod provided in an embodiment of the present application.

[0024] Fig. 9 This is a schematic diagram of the combined structure of the first core rod and the second syringe provided in an embodiment of the present application.

[0025] Fig.10 A schematic structural diagram of a second core rod provided in an embodiment of the present application.

[0026] Fig.11 A schematic structural diagram of another second core rod provided in an embodiment of the present application.

[0027] Fig.12 This is a schematic diagram of the overall structure of a suprachoroidal space injection device provided in Example 1 of the present application.

[0028] Fig.13 This is a schematic diagram of the overall structure of a suprachoroidal space injection device provided in Example 2 of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] An embodiment of the present application provides a suprachoroidal space injection device, which can be used to inject medicine into the choroid of the eyeball.

[0031] Example 1

[0032] In Example 1 of this application, please refer to Figures 1 to 12 The suprachoroidal space injection device includes a silicone ring 1, a mounting head base, a needle tube 3, a needle seat 5, a rubber plug 7, a first syringe 9, a first core rod 10, a second syringe 6, and a second core rod 8.

[0033] like Figure 1 As shown, the front end of the first core rod 10 is connected to the rubber plug 7, the first syringe 9 is provided with a drug injection cavity, the front end of the first core rod 10 extends from the rear end of the first syringe 9 into the drug injection cavity, the rubber plug 7 is sealingly and slidably connected to the drug injection cavity, the needle tube 3 is installed on the needle seat 5, the needle seat 5 is arranged at the front end of the first syringe 9, the needle tube 3 is communicated with the drug injection cavity, the needle seat 5 is fixed in the mounting head base, the silicone ring 1 is arranged at the front end of the mounting head base, the needle tip of the needle tube 3 extends out of the mounting head base and is located in the silicone ring 1, the rear end of the mounting head base is connected to the second syringe 6 and fixes the needle seat 5, the second syringe 6 is provided with an air extraction cavity, the first syringe 9 is arranged in the air extraction cavity, and the outer wall of the first syringe 9 is sealingly and slidably connected to the air extraction cavity.

[0034] like Figure 1 , Figure 2 , Figure 3As shown, when the silicone ring 1 is attached to the eyeball, the first syringe 9 is pulled out from the second syringe 6, and negative pressure is generated in the vacuum chamber to make the silicone ring 1 adsorbed on the eyeball, the needle tip of the needle tube 3 pierces the sclera of the eyeball to the choroid, and the first core rod 10 is pushed into the first syringe 9. The rubber plug 7 injects the medicine in the drug injection cavity between the sclera and choroid of the eyeball, so that the suprachoroidal space injection device can be adsorbed and fixed to the eyeball, and the length of the needle tip of the needle tube 3 extending beyond the mounting head base can limit the depth of the needle tip of the needle tube 3 piercing the eyeball, and can accurately control the injection depth to the choroid, so as to avoid dislocation and damage to the eyeball when injecting the medicine.

[0035] like Figure 4 , Figure 5 , Figure 6 As shown, the mounting head base includes a first gear regulating valve 2 and a second gear regulating valve 4, the second gear regulating valve 4 is arranged in the first gear regulating valve 2, the needle seat 5 is arranged in the second gear regulating valve 4, and the silicone ring 1 is arranged on the first gear regulating valve 2.

[0036] like Figure 2 , Figure 3 As shown, the silicone ring 1 is cylindrical, and a funnel-shaped adsorption groove is provided at the front end of the silicone ring 1, and the needle tip of the needle tube 3 is located in the funnel-shaped adsorption groove; a matching groove 1-1 is provided at the rear end of the silicone ring 1, and a matching protrusion 24 is provided at the front end of the first gear regulating valve 2, and the matching groove 1-1 is matched and connected with the matching protrusion 24.

[0037] The funnel-shaped adsorption groove is used to adhere to the eyeball to form a stable negative pressure adsorption. The matching groove 1-1 and the matching protrusion 24 are connected to each other to realize that the silicone ring 1 is replaceable. The silicone ring 1 can be set in multiple sizes, and the silicone ring 1 of a suitable size can be selected based on the size of the user's eyeball.

[0038] Furthermore, the first gear regulating valve 2 is provided with a gear protrusion 21, a first adjusting thread 22 and a groove 23, and the second gear regulating valve 4 is provided with a third sealing ring 41, a shifting protrusion 42, a blocking portion 43 and a second adjusting thread 44. The third sealing ring 41 is fixed to the outer surface of the second gear regulating valve 4, and the second gear regulating valve 4 is sealed and connected to the inner surface of the first gear regulating valve 2 through the third sealing ring 41. The shifting protrusion 42 is positioned and clamped with the gear protrusion 21, the second adjusting thread 44 is threadedly connected with the first adjusting thread 22, and the blocking portion 43 is arranged in the groove 23, and the blocking portion 43 is limited to slide in the groove 23.

[0039] The blocking portion 43 is limited to slide in the empty groove 23, and can limit the circumferential rotation angle of the first gear regulating valve 2 relative to the second gear regulating valve 4. When the first gear regulating valve 2 rotates circumferentially relative to the second gear regulating valve 4, the shifting protrusion 42 can be clamped on the gear protrusion 21 to achieve the fixation of the first gear regulating valve 2 relative to the second gear regulating valve 4. The second adjusting thread 44 is threadedly connected with the first adjusting thread 22 to achieve a detachable connection, which is convenient for installation and disassembly.

[0040] like Figure 7 As shown, the outer wall of the needle seat 5 is provided with a fourth sealing ring 51, and the needle seat 5 is sealed and connected to the inner surface of the second gear regulating valve 4 through the fourth sealing ring 51. The fourth sealing ring 51 can keep the needle seat 5 and the second gear regulating valve 4 sealed and prevent air from entering the air extraction cavity.

[0041] like Figure 8 As shown, the front end of the first syringe 9 is provided with a venting groove structure 91, and the outer side wall of the venting groove structure 91 is provided with a sealing thread 93, and the sealing thread 93 is sealingly and slidably connected with the air extraction cavity. When the first syringe 9 is pulled out from the second syringe 6, the venting groove structure 91 can extract the gas in the air extraction cavity to generate negative pressure so that the silicone ring 1 is adsorbed on the eyeball, and the sealing thread 93 prevents air from entering the air extraction cavity. When the silicone ring 1 is adsorbed on the eyeball, the needle tip of the needle tube 3 pierces the sclera to the choroid of the eyeball.

[0042] like Fig. 9 , Fig.10 , Fig.11 As shown, the suprachoroidal space injection device further includes a limiting guide component 11, which is fixed to the inner side wall of the second syringe 6; the second core rod 8 is fixed to the inner side wall of the limiting guide component 11, the first syringe 9 slides along the second core rod 8, and the limiting guide component 11 limits the sliding stroke of the first syringe 9. The limiting guide component 11 can keep the second core rod 8 moving along the axial direction of the second syringe 6, and the limiting guide component 11 can also seal to prevent air from entering the air extraction cavity. The limiting guide component 11 also limits the sliding stroke of the first syringe 9 to avoid excessive negative pressure in the air extraction cavity.

[0043] like Fig. 9 , Fig.10 , Fig.11As shown, the inner wall of the limiting guide component 11 is provided with a limiting step, the outer wall of the second core rod 8 is clamped with the limiting step, the outer wall of the second core rod 8 is provided with a second sealing ring 81, the second sealing ring 81 is sealedly connected to the inner wall of the second syringe 6, and the outer wall of the first syringe 9 is provided with a first sealing ring 92, and the first syringe 9 is sealedly connected to the inner wall of the second core rod 8 through the first sealing ring 92.

[0044] like Fig.12 As shown, the suprachoroidal space injection device also includes an air pressure display device. The outer wall of the second syringe 6 is also provided with a side wall hole 64 connected to the vacuum chamber. The air pressure display device is installed on the side wall hole 64 to display the air pressure in the vacuum chamber.

[0045] like Fig.12 As shown, the pulse air pressure display device includes a passage 1 12, an adjusting button 13, a pressure valve 14, a passage 2 15 and a digital display 16, the pressure valve 14 is arranged on the digital display 16, the adjusting button 13 is arranged on the pressure valve 14, the passage 1 12 and the passage 2 15 are arranged on both sides of the digital display 16, and the passage 12 is connected to the side wall hole 64.

[0046] When in use, the silicone ring 1 is attached to the eyeball, the side wall hole 64 of the second syringe 6 is connected to the passage 12, and the desired negative pressure value is set by adjusting the adjustment knob 13, and the second core rod 8 is pulled back to generate negative pressure in the vacuum chamber of the second syringe 6; the sclera of the eyeball will be sucked up due to the negative pressure, and at the same time, the needle tip of the needle tube 3 will pierce the sclera of the eyeball and extend into the injection area between the sclera and choroid of the eyeball.

[0047] The extension length of the needle tube 3 can be controlled by rotating the first gear regulating valve 2 relative to the second gear regulating valve 4. When rotating, the blocking portion 43 of the second gear regulating valve 4 performs a circular motion in the empty slot 23 of the first gear regulating valve 2, and the maximum motion distance is limited by the circumferential length of the empty slot 23; at the same time, the shifting protrusion 42 of the second gear regulating valve 4 cooperates with the gear protrusion 21 of the first gear regulating valve 2, and when rotating, a sound is emitted to prompt that the gear is rotated by one unit.

[0048] The medicine injection cavity is provided with a filling bottle or filled with liquid medicine, and the liquid medicine can be directly injected between the sclera and choroid of the eyeball by pushing the first core rod 10 .

[0049] The suprachoroidal space injection device provided in the embodiment of the present application is as follows: when the silicone ring 1 is attached to the eyeball, the first syringe 9 is pulled out from the second syringe 6, and negative pressure is generated in the vacuum chamber so that the silicone ring 1 is adsorbed on the eyeball, the needle tip of the needle tube 3 pierces the sclera of the eyeball to the choroid, and the first core rod 10 is pushed into the first syringe 9. The rubber plug 7 injects the medicine in the medicine injection chamber between the sclera and choroid of the eyeball, so that the suprachoroidal space injection device can be adsorbed and fixed to the eyeball, and the length of the needle tip of the needle tube 3 extending beyond the mounting head base can limit the depth of the needle tip of the needle tube 3 piercing the eyeball, and can accurately control the injection depth to the choroid, thereby avoiding dislocation and damage to the eyeball when injecting the medicine.

[0050] Example 2

[0051] In Example 2 of this application, please refer to Figures 1 to 11 , Fig.13 The suprachoroidal space injection device includes a silicone ring 1, a mounting head base, a needle tube 3, a needle seat 5, a rubber plug 7, a first syringe 9, a first core rod 10, a second syringe 6, and a second core rod 8.

[0052] like Figure 1 As shown, the front end of the first core rod 10 is connected to the rubber plug 7, the first syringe 9 is provided with a drug injection cavity, the front end of the first core rod 10 extends from the rear end of the first syringe 9 into the drug injection cavity, the rubber plug 7 is sealingly and slidably connected to the drug injection cavity, the needle tube 3 is installed on the needle seat 5, the needle seat 5 is arranged at the front end of the first syringe 9, the needle tube 3 is communicated with the drug injection cavity, the needle seat 5 is fixed in the mounting head base, the silicone ring 1 is arranged at the front end of the mounting head base, the needle tip of the needle tube 3 extends out of the mounting head base and is located in the silicone ring 1, the rear end of the mounting head base is connected to the second syringe 6 and fixes the needle seat 5, the second syringe 6 is provided with an air extraction cavity, the first syringe 9 is arranged in the air extraction cavity, and the outer wall of the first syringe 9 is sealingly and slidably connected to the air extraction cavity.

[0053] like Figure 1 , Figure 2 , Figure 3As shown, when the silicone ring 1 is attached to the eyeball, the first syringe 9 is pulled out from the second syringe 6, and negative pressure is generated in the vacuum chamber to make the silicone ring 1 adsorbed on the eyeball, the needle tip of the needle tube 3 pierces the sclera of the eyeball to the choroid, and the first core rod 10 is pushed into the first syringe 9. The rubber plug 7 injects the medicine in the drug injection cavity between the sclera and choroid of the eyeball, so that the suprachoroidal space injection device can be adsorbed and fixed to the eyeball, and the length of the needle tip of the needle tube 3 extending beyond the mounting head base can limit the depth of the needle tip of the needle tube 3 piercing the eyeball, and can accurately control the injection depth to the choroid, so as to avoid dislocation and damage to the eyeball when injecting the medicine.

[0054] like Figure 4 , Figure 5 , Figure 6 As shown, the mounting head base includes a first gear regulating valve 2 and a second gear regulating valve 4, the second gear regulating valve 4 is arranged in the first gear regulating valve 2, the needle seat 5 is arranged in the second gear regulating valve 4, and the silicone ring 1 is arranged on the first gear regulating valve 2.

[0055] like Figure 2 , Figure 3 As shown, the silicone ring 1 is cylindrical, and a funnel-shaped adsorption groove is provided at the front end of the silicone ring 1, and the needle tip of the needle tube 3 is located in the funnel-shaped adsorption groove; a matching groove 1-1 is provided at the rear end of the silicone ring 1, and a matching protrusion 24 is provided at the front end of the first gear regulating valve 2, and the matching groove 1-1 is matched and connected with the matching protrusion 24.

[0056] The funnel-shaped adsorption groove is used to adhere to the eyeball to form a stable negative pressure adsorption. The matching groove 1-1 and the matching protrusion 24 are connected to each other to realize that the silicone ring 1 is replaceable. The silicone ring 1 can be set in multiple sizes, and the silicone ring 1 of a suitable size can be selected based on the size of the user's eyeball.

[0057] Furthermore, the first gear regulating valve 2 is provided with a gear protrusion 21, a first adjusting thread 22 and a groove 23, and the second gear regulating valve 4 is provided with a third sealing ring 41, a shifting protrusion 42, a blocking portion 43 and a second adjusting thread 44. The third sealing ring 41 is fixed to the outer surface of the second gear regulating valve 4, and the second gear regulating valve 4 is sealed and connected to the inner surface of the first gear regulating valve 2 through the third sealing ring 41. The shifting protrusion 42 is positioned and clamped with the gear protrusion 21, the second adjusting thread 44 is threadedly connected with the first adjusting thread 22, and the blocking portion 43 is arranged in the groove 23, and the blocking portion 43 is limited to slide in the groove 23.

[0058] The blocking portion 43 is limited to slide in the empty groove 23, and can limit the circumferential rotation angle of the first gear regulating valve 2 relative to the second gear regulating valve 4. When the first gear regulating valve 2 rotates circumferentially relative to the second gear regulating valve 4, the shifting protrusion 42 can be clamped on the gear protrusion 21 to achieve the fixation of the first gear regulating valve 2 relative to the second gear regulating valve 4. The second adjusting thread 44 is threadedly connected with the first adjusting thread 22 to achieve a detachable connection, which is convenient for installation and disassembly.

[0059] like Figure 7 As shown, the outer wall of the needle seat 5 is provided with a fourth sealing ring 51, and the needle seat 5 is sealed and connected to the inner surface of the second gear regulating valve 4 through the fourth sealing ring 51. The fourth sealing ring 51 can keep the needle seat 5 and the second gear regulating valve 4 sealed and prevent air from entering the air extraction cavity.

[0060] like Figure 8 As shown, the front end of the first syringe 9 is provided with a venting groove structure 91, and the outer side wall of the venting groove structure 91 is provided with a sealing thread 93, and the sealing thread 93 is sealingly and slidably connected with the air extraction cavity. When the first syringe 9 is pulled out from the second syringe 6, the venting groove structure 91 can extract the gas in the air extraction cavity to generate negative pressure so that the silicone ring 1 is adsorbed on the eyeball, and the sealing thread 93 prevents air from entering the air extraction cavity. When the silicone ring 1 is adsorbed on the eyeball, the needle tip of the needle tube 3 pierces the sclera to the choroid of the eyeball.

[0061] like Fig. 9 , Fig.10 , Fig.11 As shown, the suprachoroidal space injection device further includes a limiting guide component 11, which is fixed to the inner side wall of the second syringe 6; the second core rod 8 is fixed to the inner side wall of the limiting guide component 11, the first syringe 9 slides along the second core rod 8, and the limiting guide component 11 limits the sliding stroke of the first syringe 9. The limiting guide component 11 can keep the second core rod 8 moving along the axial direction of the second syringe 6, and the limiting guide component 11 can also seal to prevent air from entering the air extraction cavity. The limiting guide component 11 also limits the sliding stroke of the first syringe 9 to avoid excessive negative pressure in the air extraction cavity.

[0062] like Fig. 9 , Fig.10 , Fig.11As shown, the inner wall of the limiting guide component 11 is provided with a limiting step, the outer wall of the second core rod 8 is clamped with the limiting step, the outer wall of the second core rod 8 is provided with a second sealing ring 81, the second sealing ring 81 is sealedly connected to the inner wall of the second syringe 6, and the outer wall of the first syringe 9 is provided with a first sealing ring 92, and the first syringe 9 is sealedly connected to the inner wall of the second core rod 8 through the first sealing ring 92.

[0063] like Fig.13 As shown, the pulse pressure display device includes a negative pressure indicator 17.

[0064] When in use, the silicone ring 1 is attached to the eyeball, the side wall hole 64 of the second syringe 6 is connected to the passage 12, and the desired negative pressure value is set by adjusting the adjustment knob 13, and the second core rod 8 is pulled back to generate negative pressure in the vacuum chamber of the second syringe 6; the sclera of the eyeball will be sucked up due to the negative pressure, and at the same time, the needle tip of the needle tube 3 will pierce the sclera of the eyeball and extend into the injection area between the sclera and choroid of the eyeball.

[0065] The extension length of the needle tube 3 can be controlled by rotating the first gear regulating valve 2 relative to the second gear regulating valve 4. When rotating, the blocking portion 43 of the second gear regulating valve 4 performs a circular motion in the empty slot 23 of the first gear regulating valve 2, and the maximum motion distance is limited by the circumferential length of the empty slot 23; at the same time, the shifting protrusion 42 of the second gear regulating valve 4 cooperates with the gear protrusion 21 of the first gear regulating valve 2, and when rotating, a sound is emitted to prompt that the gear is rotated by one unit.

[0066] The medicine injection cavity is provided with a filling bottle or filled with liquid medicine, and the liquid medicine can be directly injected between the sclera and choroid of the eyeball by pushing the first core rod 10 .

[0067] The suprachoroidal space injection device provided in the embodiment of the present application is as follows: when the silicone ring 1 is attached to the eyeball, the first syringe 9 is pulled out from the second syringe 6, and negative pressure is generated in the vacuum chamber so that the silicone ring 1 is adsorbed on the eyeball, the needle tip of the needle tube 3 pierces the sclera of the eyeball to the choroid, and the first core rod 10 is pushed into the first syringe 9. The rubber plug 7 injects the medicine in the medicine injection chamber between the sclera and choroid of the eyeball, so that the suprachoroidal space injection device can be adsorbed and fixed to the eyeball, and the length of the needle tip of the needle tube 3 extending beyond the mounting head base can limit the depth of the needle tip of the needle tube 3 piercing the eyeball, and can accurately control the injection depth to the choroid, thereby avoiding dislocation and damage to the eyeball when injecting the medicine.

[0068] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] The above is a detailed introduction to a suprachoroidal space injection device provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A suprachoroidal space injection device, characterized in that: It includes a silicone ring, a mounting head base, a needle tube, a needle seat, a rubber plug, a first syringe, a first core rod, a second syringe, and a second core rod; The front end of the first core rod is connected to the rubber plug, the first syringe is provided with a drug injection cavity, the front end of the first core rod extends from the rear end of the first syringe into the drug injection cavity, the rubber plug is sealingly and slidably connected to the drug injection cavity, the needle tube is installed on the needle seat, the needle seat is arranged at the front end of the first syringe, the needle tube is communicated with the drug injection cavity, the needle seat is fixed in the mounting head base, the silicone ring is arranged at the front end of the mounting head base, the needle tip of the needle tube extends out of the mounting head base and is located in the silicone ring, the rear end of the mounting head base is connected to the second syringe and fixes the needle seat, the second syringe is provided with an air extraction cavity, the first syringe is arranged in the air extraction cavity, and the outer wall of the first syringe is sealingly and slidably connected to the air extraction cavity.

2. The suprachoroidal space injection device according to claim 1, characterized in that: The mounting head base includes a first gear regulating valve and a second gear regulating valve, the second gear regulating valve is arranged in the first gear regulating valve, the needle seat is arranged in the second gear regulating valve, and the silicone ring is arranged on the first gear regulating valve.

3. The suprachoroidal space injection device according to claim 2, characterized in that: The silicone ring is cylindrical, and a funnel-shaped adsorption groove is provided at the front end of the silicone ring, and the needle tip of the needle tube is located in the funnel-shaped adsorption groove; a matching groove is provided at the rear end of the silicone ring, and a matching protrusion is provided at the front end of the first gear regulating valve, and the matching groove is matched and connected with the matching protrusion.

4. The suprachoroidal space injection device according to claim 2, characterized in that: The first gear regulating valve is provided with a gear protrusion, a first adjusting thread and an empty groove, the second gear regulating valve is provided with a third sealing ring, a shifting protrusion, a blocking portion and a second adjusting thread, the third sealing ring is fixed to the outer surface of the second gear regulating valve, the second gear regulating valve is sealed and connected to the inner surface of the first gear regulating valve via the third sealing ring, the shifting protrusion is positioned and clamped with the gear protrusion, the second adjusting thread is threadedly connected with the first adjusting thread, the blocking portion is arranged in the empty groove, and the blocking portion is limited to slide in the empty groove.

5. The suprachoroidal space injection device according to claim 2, characterized in that: A fourth sealing ring is provided on the outer side wall of the needle seat, and the needle seat is sealed and connected to the inner surface of the second gear regulating valve through the fourth sealing ring.

6. The suprachoroidal space injection device according to claim 1, characterized in that: A venting groove structure is provided at the front end of the first syringe, a sealing thread is provided on the outer side wall of the venting groove structure, and the sealing thread is sealingly and slidably connected with the air extraction cavity.

7. The suprachoroidal space injection device according to claim 1, characterized in that: The suprachoroidal space injection device also includes a limiting guide component, which is fixed on the inner side wall of the second syringe; the second core rod is fixed to the inner side wall of the limiting guide component, the first syringe slides along the second core rod, and the limiting guide component limits the sliding stroke of the first syringe.

8. The suprachoroidal space injection device according to claim 7, characterized in that: The inner side wall of the limiting guide component is provided with a limiting step, the outer side wall of the second core rod is clamped with the limiting step, the outer side wall of the second core rod is provided with a second sealing ring, the second sealing ring is sealedly connected to the inner side wall of the second syringe, the outer side wall of the first syringe is provided with a first sealing ring, and the first syringe is sealedly connected to the inner side wall of the second core rod through the first sealing ring.

9. The suprachoroidal space injection device according to claim 1, characterized in that: The suprachoroidal space injection device also includes an air pressure display device. The outer wall of the second syringe is also provided with a side wall hole connected to the vacuum chamber. The air pressure display device is installed on the side wall hole to display the air pressure in the vacuum chamber.

10. The suprachoroidal space injection device according to claim 9, characterized in that: The pulse air pressure display device includes passage one, an adjusting button, a pressure valve, passage two and a digital display, the pressure valve is arranged on the digital display, the adjusting button is arranged on the pressure valve, the passage one and the passage two are arranged on both sides of the digital display, and the passage one is connected to the side wall hole; or the pulse air pressure display device includes a negative pressure indicator.

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