A suprachoroidal injection device

Abstract

The application discloses a choroid suprachoroidal 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 syringe, a first core rod, a second syringe and a second core rod.When the silica gel ring is attached to an eyeball, the first syringe is pulled out from the second syringe, a negative pressure is generated in the air suction cavity to enable the silica gel ring to be adsorbed to the eyeball, the needle tip of the needle tube pierces the sclera of the eyeball to the choroid, the first core rod is pushed into the first syringe, the rubber plug injects the medicine in the medicine injection cavity between the sclera and the choroid of the eyeball, so that the choroid suprachoroidal injection device can be adsorbed and fixed to the eyeball, the length of the needle tip of the needle tube extending out of the mounting head base can define the depth at which the needle tip of the needle tube pierces the eyeball, and the injection depth to the choroid can be accurately controlled, so that the eyeball is prevented from being easily misaligned and damaged when the medicine is injected.

Description

TECHNICAL FIELD

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

[0002] The lack of an adsorption syringe for the eyeball in the injection device makes it difficult to be adsorbed and fixed with the eyeball, causing serious damage to the eyeball due to mispositioning during injection of the medicine, and it is difficult to control the injection depth for the needle tip of the needle tube to pierce the sclera to the choroid of the eyeball, causing difficulty in injecting the medicine into the choroid of the eyeball. SUMMARY

[0003] The embodiment of the present application provides a suprachoroidal injection device, which is used to solve the technical problem of adsorbing and fixing the eyeball, accurately controlling the injection depth to the choroid, and avoiding mispositioning and serious damage to the eyeball during injection of the medicine.

[0004] The embodiment of the present application provides a suprachoroidal injection device, which comprises a silica gel 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.

[0005] The front end of the first core rod is connected to the rubber plug, the first syringe is provided with a medicine injection cavity, the front end of the first core rod extends into the medicine injection cavity from the rear end of the first syringe, the rubber plug is in sealed sliding connection with the medicine 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 in communication with the medicine injection cavity, the needle seat is fixed in the mounting head base, the silica gel 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 silica gel 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 side wall of the first syringe is in sealed sliding connection with the air extraction cavity.

[0006] Further, the mounting head base comprises a first gear adjustment valve and a second gear adjustment valve, the second gear adjustment valve is arranged in the first gear adjustment valve, the needle seat is arranged in the second gear adjustment valve, and the silica gel ring is arranged on the first gear adjustment valve.

[0007] Further, the silica gel ring is in the shape of a cylinder, the front end of the silica gel ring is provided with a funnel-shaped adsorption groove, and the needle tip of the needle tube is located in the funnel-shaped adsorption groove; the rear end of the silica gel ring is provided with a matching groove, the front end of the first gear adjustment valve is provided with a matching protrusion, and the matching groove is in matching connection with the matching protrusion.

[0008] Further, the first gear adjusting valve is provided with a gear protrusion, a first adjusting screw and an empty slot, the second gear adjusting valve is provided with a third sealing ring, a gear shifting protrusion, a blocking part and a second adjusting screw, the third sealing ring is fixed on the outer surface of the second gear adjusting valve, the second gear adjusting valve is sealingly connected with the inner surface of the first gear adjusting valve through the third sealing ring, the gear shifting protrusion is positioned and clamped with the gear protrusion, the second adjusting screw is threadedly connected with the first adjusting screw, and the blocking part is arranged in the empty slot and is limited to slide in the empty slot.

[0009] Further, the outer side wall of the needle seat is provided with a fourth sealing ring, and the needle seat is sealingly connected with the inner surface of the second gear adjusting valve through the fourth sealing ring.

[0010] Further, the front end of the first syringe is provided with a vent groove structure, the outer side wall of the vent groove structure is provided with a sealing screw, and the sealing screw is sealingly and slidingly connected with the air extraction cavity.

[0011] Further, the suprachoroidal space injection device further comprises a limiting guide part, the limiting guide part is fixed on the inner side wall of the second syringe, the second core rod is fixed with the inner side wall of the limiting guide part, the first syringe slides along the second core rod, and the limiting guide part limits the sliding stroke of the first syringe.

[0012] Further, the inner side wall of the limiting guide part 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 sealingly connected with 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 sealingly connected with the inner side wall of the second core rod through the first sealing ring.

[0013] Further, the suprachoroidal space injection device further comprises a gas pressure display device, the outer side wall of the second syringe is further provided with a side wall hole communicating with the air extraction cavity, and the gas pressure display device is installed on the side wall hole and used for displaying the gas pressure in the air extraction cavity.

[0014] Further, the gas pressure display device comprises a passage one, an adjusting knob, a pressure valve, a passage two and a digital display, the pressure valve is arranged on the digital display, the adjusting knob is arranged on the pressure valve, the passage one and the passage two are arranged on the two sides of the digital display, and the passage one is connected with the side wall hole; or the gas pressure display device comprises a negative pressure indicator.

[0015] The choroid cavity injection device provided by the embodiment of the present application can be adsorbed and fixed to the eyeball, the length of the needle tip of the needle tube extending out of the mounting head base can limit the depth of the needle tip of the needle tube piercing the eyeball, and the injection depth to the choroid can be accurately controlled to avoid misplacement and damage to the eyeball when injecting the medicine. BRIEF DESCRIPTION OF DRAWINGS

[0016] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0017] Figure 1 The structure schematic diagram of the choroid cavity injection device provided by the embodiment of the present application is shown.

[0018] Figure 2 The combined structure schematic diagram of the silica gel ring and the mounting head base provided by the embodiment of the present application is shown.

[0019] Figure 3 The structure schematic diagram of the needle tube piercing the eyeball based on the silica gel ring provided by the embodiment of the present application is shown.

[0020] Figure 4 The structure schematic diagram of the mounting head base provided by the embodiment of the present application is shown.

[0021] Figure 5 The structure schematic diagram of the second gear adjusting valve provided by the embodiment of the present application is shown.

[0022] Figure 6 The sectional view of the second gear adjusting valve provided by the embodiment of the present application is shown.

[0023] Figure 7 The structure schematic diagram of the needle tube mounted in the needle seat provided by the embodiment of the present application is shown.

[0024] Figure 8 The combined structure schematic diagram of the rubber plug, the first injector and the first core rod provided by the embodiment of the present application is shown.

[0025] Figure 9 The combined structure schematic diagram of the first core rod and the second injector provided by the embodiment of the present application is shown.

[0026] Figure 10 The structure schematic diagram of a second core rod provided by the embodiment of the present application is shown.

[0027] Figure 11 Another second core rod structure schematic view provided by the embodiment of the present application.

[0028] Figure 12 A whole structure schematic view of a suprachoroidal injection device provided by the embodiment 1 of the present application.

[0029] Figure 13 A whole structure schematic view of a suprachoroidal injection device provided by the embodiment 2 of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] The embodiment of the present application provides a suprachoroidal injection device, which can inject medicine into the choroid of an eyeball.

[0032] Embodiment 1

[0033] In the embodiment 1 of the present application, please refer to Figures 1 to 12 , the suprachoroidal injection device comprises a silica gel 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.

[0034] As shown in Figure 1 , the front end of the first core rod 10 is connected to the rubber plug 7, the first syringe 9 is provided with a medicine injection cavity, the front end of the first core rod 10 extends into the medicine injection cavity from the rear end of the first syringe 9, the rubber plug 7 is in sealed sliding connection with the medicine 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 in communication with the medicine injection cavity, the needle seat 5 is fixed in the mounting head base, the silica gel 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 silica gel 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 a suction cavity, the first syringe 9 is arranged in the suction cavity, and the outer side wall of the first syringe 9 is in sealed sliding connection with the suction cavity.

[0035] As shown in Figure 1 , Figure 2 , Figure 3As shown, when the silica gel ring 1 is attached to the eyeball, the first syringe 9 is pulled out from the second syringe 6, the negative pressure in the air suction cavity causes the silica gel ring 1 to be adsorbed to the eyeball, the needle tip of the needle tube 3 pierces the sclera to the choroid of the eyeball, the first core rod 10 is pushed into the first syringe 9, the rubber plug 7 injects the liquid medicine in the medicine injection cavity between the sclera and the choroid of the eyeball, so that the suprachoroidal space injection device can be adsorbed and fixed with the eyeball, and the length of the needle tip of the needle tube 3 extending out of the mounting head base can define the depth of the needle tip of the needle tube 3 piercing the eyeball, so as to accurately control the injection depth to the choroid and avoid misplacement and damage to the eyeball when injecting the liquid medicine.

[0036] As shown in Figure 4 , Figure 5 , Figure 6 As shown, the mounting head base comprises a first gear adjusting valve 2 and a second gear adjusting valve 4, the second gear adjusting valve 4 is arranged in the first gear adjusting valve 2, the needle seat 5 is arranged in the second gear adjusting valve 4, and the silica gel ring 1 is arranged on the first gear adjusting valve 2.

[0037] As shown in Figure 2 , Figure 3 The silica gel ring 1 is in a cylindrical shape, the front end of the silica gel ring 1 is provided with a funnel-shaped adsorption groove, and the needle tip of the needle tube 3 is located in the funnel-shaped adsorption groove; the rear end of the silica gel ring 1 is provided with a matching groove 1-1, the front end of the first gear adjusting valve 2 is provided with a matching protrusion 24, and the matching groove 1-1 is connected with the matching protrusion 24.

[0038] The funnel-shaped adsorption groove is used to attach to the eyeball to form stable negative pressure adsorption. The matching groove 1-1 and the matching protrusion 24 are connected to realize that the silica gel ring 1 is replaceable, and the silica gel ring 1 can be provided with multiple sizes, and the silica gel ring 1 with a suitable size can be selected based on the size of the eyeball of the user.

[0039] Further, the first gear adjusting valve 2 is provided with a gear protrusion 21, a first adjusting thread 22 and a hollow groove 23, the second gear adjusting valve 4 is provided with a third sealing ring 41, a gear shifting protrusion 42, a blocking part 43 and a second adjusting thread 44, the third sealing ring 41 is fixed to the outer surface of the second gear adjusting valve 4, the second gear adjusting valve 4 is sealingly connected with the inner surface of the first gear adjusting valve 2 through the third sealing ring 41, the gear 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, the blocking part 43 is arranged in the hollow groove 23, and the blocking part 43 is limited to slide in the hollow groove 23.

[0040] The blocking part 43 is limited to slide in the air slot 23, and can limit the circumferential rotation angle of the first gear adjusting valve 2 relative to the second gear adjusting valve 4. When the first gear adjusting valve 2 rotates circumferentially relative to the second gear adjusting valve 4, the gear protrusion 42 can be clamped on the gear protrusion 21, so that the first gear adjusting valve 2 is fixed relative to the second gear adjusting valve 4. The second adjusting screw 44 is threadedly connected with the first adjusting screw 22, so that the first adjusting screw 22 and the second adjusting screw 44 are detachably connected, which facilitates installation and disassembly.

[0041] As shown in Figure 7 , the outer side wall of the needle seat 5 is provided with a fourth sealing ring 51, and the needle seat 5 is sealingly connected with the inner surface of the second gear adjusting valve 4 through the fourth sealing ring 51. The fourth sealing ring 51 can keep the needle seat 5 sealingly connected with the second gear adjusting valve 4, so as to prevent air from entering the air cavity.

[0042] As shown in Figure 8 , the front end of the first syringe 9 is provided with a vent groove structure 91, and the outer side wall of the vent groove structure 91 is provided with a sealing screw 93, which is sealingly and slidably connected with the air cavity. When the first syringe 9 is pulled out of the second syringe 6, the vent groove structure 91 can extract the gas in the air cavity to generate negative pressure, so that the silica gel ring 1 is adsorbed on the eyeball. The sealing screw 93 prevents air from entering the air cavity, and the needle tip of the needle tube 3 pierces the sclera to the choroid when the silica gel ring 1 is adsorbed on the eyeball.

[0043] As shown in Figure 9 , Figure 10 , Figure 11 , the choroidal space injection device further comprises a limiting guide part 11, which is fixed on the inner side wall of the second syringe 6; the second core rod 8 is fixed with the inner side wall of the limiting guide part 11, the first syringe 9 slides along the second core rod 8, and the limiting guide part 11 limits the sliding stroke of the first syringe 9. The limiting guide part 11 can keep the second core rod 8 moving along the axis direction of the second syringe 6, and the limiting guide part 11 can also prevent air from entering the air cavity. The limiting guide part 11 limits the sliding stroke of the first syringe 9 at the same time, so as to avoid that the negative pressure in the air cavity is too high.

[0044] As shown in Figure 9 , Figure 10 , Figure 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 engaged 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 sealed to the inner wall of the second syringe 6, the outer wall of the first syringe 9 is provided with a first sealing ring 92, the first syringe 9 is sealed to the inner wall of the second core rod 8 through the first sealing ring 92.

[0045] like Figure 12 As shown, the suprachoroidal injection device also includes a pressure display device. The outer side wall of the second syringe 6 is also provided with a side wall hole 64 that communicates with the suction chamber. The pressure display device is installed on the side wall hole 64 to display the pressure in the suction chamber.

[0046] like Figure 12 As shown, the pulse pressure display device includes a first passage 12, an adjustment knob 13, a pressure valve 14, a second passage 15, and a digital display 16. The pressure valve 14 is mounted on the digital display 16, the adjustment knob 13 is mounted on the pressure valve 14, the first passage 12 and the second passage 15 are located on both sides of the digital display 16, and the first passage 12 is connected to the side wall hole 64.

[0047] In use, the silicone ring 1 is attached to the eyeball, and the side wall hole 64 of the second syringe 6 is connected to the passage 12. The required 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 suction chamber of the second syringe 6. Due to the negative pressure, the sclera of the eyeball is sucked up, and at the same time, the needle tip of the needle tube 3 pierces the sclera of the eyeball and extends into the injection area between the sclera and choroid of the eyeball.

[0048] Rotating the first gear regulating valve 2 relative to the second gear regulating valve 4 controls the extension length of the needle tube 3. When rotating, the blocking part 43 of the second gear regulating valve 4 moves in a circular motion within the empty groove 23 of the first gear regulating valve 2, and the maximum distance of movement is limited by the circumferential length of the empty groove 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 rotated, an audible signal indicates that one gear has been rotated.

[0049] The drug injection cavity is equipped with a filling bottle or filled with medicine. Pushing the first core rod 10 can directly inject the medicine between the sclera and choroid of the eyeball.

[0050] The choroid cavity injection device provided by the embodiment of the present application can be adsorbed and fixed to the eyeball, the length of the needle tip of the needle tube 3 extending out of the mounting head base can limit the depth of the needle tip of the needle tube 3 piercing the eyeball, and the injection depth to the choroid can be accurately controlled, so as to avoid misplacement and damage to the eyeball when injecting the medicine.

[0051] Embodiment 2

[0052] In the embodiment 2 of the present application, please refer to Figures 1 to 11 、 Figure 13 , the choroid cavity injection device comprises a silica gel 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.

[0053] As shown in Figure 1 , the front end of the first core rod 10 is connected to the rubber plug 7, the first syringe 9 is provided with a medicine injection cavity, the front end of the first core rod 10 extends into the medicine injection cavity from the rear end of the first syringe 9, the rubber plug 7 is in sealing and sliding connection with the medicine 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 in communication with the medicine injection cavity, the needle seat 5 is fixed in the mounting head base, the silica gel 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 silica gel 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 a suction cavity, the first syringe 9 is arranged in the suction cavity, and the outer side wall of the first syringe 9 is in sealing and sliding connection with the suction cavity.

[0054] As shown in Figure 1 、 Figure 2 、 Figure 3As shown, when the silica gel ring 1 is attached to the eyeball, the first syringe 9 is pulled out from the second syringe 6, the negative pressure in the air suction cavity causes the silica gel ring 1 to be adsorbed to the eyeball, the needle tip of the needle tube 3 pierces the sclera to the choroid of the eyeball, the first core rod 10 is pushed into the first syringe 9, the rubber plug 7 injects the liquid medicine in the medicine injection cavity between the sclera and the choroid of the eyeball, so that the suprachoroidal space injection device can be adsorbed and fixed with the eyeball, and the length of the needle tip of the needle tube 3 extending out of the mounting head base can define the depth of the needle tip of the needle tube 3 piercing the eyeball, so as to accurately control the injection depth to the choroid and avoid misplacement and damage to the eyeball when injecting the liquid medicine.

[0055] As shown in Figure 4 , Figure 5 , Figure 6 As shown, the mounting head base comprises a first gear adjusting valve 2 and a second gear adjusting valve 4, the second gear adjusting valve 4 is arranged in the first gear adjusting valve 2, the needle seat 5 is arranged in the second gear adjusting valve 4, and the silica gel ring 1 is arranged on the first gear adjusting valve 2.

[0056] As shown in Figure 2 , Figure 3 As shown, the silica gel ring 1 is in a cylindrical shape, the front end of the silica gel ring 1 is provided with a funnel-shaped adsorption groove, and the needle tip of the needle tube 3 is located in the funnel-shaped adsorption groove; the rear end of the silica gel ring 1 is provided with a matching groove 1-1, the front end of the first gear adjusting valve 2 is provided with a matching protrusion 24, and the matching groove 1-1 is connected with the matching protrusion 24.

[0057] The funnel-shaped adsorption groove is used to attach to the eyeball to form stable negative pressure adsorption. The matching groove 1-1 and the matching protrusion 24 are connected to realize that the silica gel ring 1 is replaceable, and the silica gel ring 1 can be provided with multiple sizes, and the silica gel ring 1 with a suitable size can be selected based on the size of the eyeball of the user.

[0058] Further, the first gear adjusting valve 2 is provided with a gear protrusion 21, a first adjusting thread 22 and a hollow groove 23, the second gear adjusting valve 4 is provided with a third sealing ring 41, a gear shifting protrusion 42, a blocking part 43 and a second adjusting thread 44, the third sealing ring 41 is fixed on the outer surface of the second gear adjusting valve 4, the second gear adjusting valve 4 is sealingly connected with the inner surface of the first gear adjusting valve 2 through the third sealing ring 41, the gear 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 part 43 is arranged in the hollow groove 23 and is limited to slide in the hollow groove 23.

[0059] The blocking part 43 is limited to slide in the air slot 23, and can limit the circumferential rotation angle of the first gear adjusting valve 2 relative to the second gear adjusting valve 4. When the first gear adjusting valve 2 rotates circumferentially relative to the second gear adjusting valve 4, the gear protrusion 42 can be clamped on the gear protrusion 21, so as to realize the fixation of the first gear adjusting valve 2 relative to the second gear adjusting valve 4. The second adjusting screw 44 is threadedly connected with the first adjusting screw 22, so as to realize detachable connection, and facilitate installation and disassembly.

[0060] As shown in Figure 7 , the outer side wall of the needle seat 5 is provided with a fourth sealing ring 51, and the needle seat 5 is sealingly connected with the inner surface of the second gear adjusting valve 4 through the fourth sealing ring 51. The fourth sealing ring 51 can keep the needle seat 5 sealingly connected with the second gear adjusting valve 4, so as to prevent air from entering the air extraction cavity.

[0061] As shown in Figure 8 , the front end of the first syringe 9 is provided with a vent groove structure 91, and the outer side wall of the vent groove structure 91 is provided with a sealing screw 93, which is sealingly and slidingly connected with the air extraction cavity. When the first syringe 9 is pulled out from the second syringe 6, the vent groove structure 91 can extract the gas in the air extraction cavity to generate negative pressure, so that the silica gel ring 1 is adsorbed on the eyeball. The sealing screw 93 prevents air from entering the air extraction cavity, and the needle tip of the needle tube 3 pierces the sclera to the choroid of the eyeball when the silica gel ring 1 is adsorbed on the eyeball.

[0062] As shown in Figure 9 , Figure 10 , Figure 11 , the choroidal space injection device further comprises a limiting guide part 11, which is fixed on the inner side wall of the second syringe 6; the second core rod 8 is fixed with the inner side wall of the limiting guide part 11, the first syringe 9 slides along the second core rod 8, and the limiting guide part 11 limits the sliding stroke of the first syringe 9. The limiting guide part 11 can keep the second core rod 8 moving along the axis direction of the second syringe 6, and the limiting guide part 11 can also prevent air from entering the air extraction cavity. The limiting guide part 11 limits the sliding stroke of the first syringe 9 at the same time, so as to avoid that the negative pressure in the air extraction cavity is too high.

[0063] As shown in Figure 9 , Figure 10 , Figure 11As shown, the inner side wall of the limiting guide part 11 is provided with a limiting step, the outer side wall of the second core rod 8 is in clamped connection with the limiting step, the outer side wall of the second core rod 8 is provided with a second sealing ring 81, the second sealing ring 81 is in sealing connection with the inner side wall of the second syringe 6, the outer side wall of the first syringe 9 is provided with a first sealing ring 92, and the first syringe 9 is in sealing connection with the inner side wall of the second core rod 8 through the first sealing ring 92.

[0064] As shown in the drawings, Figure 13 The pulse gas pressure display device includes a negative pressure indicator 17.

[0065] In use, the silica gel ring 1 is attached to the eyeball, the side wall hole 64 of the second syringe 6 is connected with the passage 12, the required negative pressure value is set by adjusting the adjusting knob 13, the second core rod 8 is pulled back, and the negative pressure in the air extraction cavity of the second syringe 6 is generated; due to the action of the negative pressure, the sclera of the eyeball is sucked up, at the same time, the needle tip of the needle tube 3 pierces the sclera of the eyeball and extends into the injection area between the sclera and the choroid of the eyeball.

[0066] The first gear adjusting valve 2 is rotated relative to the second gear adjusting valve 4 to control the extension length of the needle tube 3. When rotating, the blocking part 43 of the second gear adjusting valve 4 moves in a circle in the empty groove 23 of the first gear adjusting valve 2, and the maximum movement distance is limited by the length of the empty groove 23 in the circumferential direction; at the same time, the gear shifting protrusion 42 of the second gear adjusting valve 4 cooperates with the gear protrusion 21 of the first gear adjusting valve 2, and when rotating, a sound is emitted to prompt that the gear has been rotated by one unit.

[0067] The medicine injection cavity is provided with a filling bottle or filled with medicine water, and the first core rod 10 is pushed to directly inject the medicine water between the sclera and the choroid of the eyeball.

[0068] The choroid cavity injection device provided by the embodiment of the present application can be fixedly attached to the eyeball, the length of the needle tip of the needle tube 3 extending out of the mounting head base can limit the depth of the needle tip of the needle tube 3 piercing the eyeball, and the injection depth to the choroid can be accurately controlled to avoid mispositioning and damage to the eyeball when injecting the medicine water.

[0069] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0070] The above has carried on the detailed introduction to the choroid cavity injection device provided by the embodiment of the application, the principle and implementation mode of the application are described in this paper, and the above embodiment is only used to help understand the technical scheme of the application and its core idea; ordinary skilled in the art should understand that: it can still modify the technical scheme recorded by the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the application.

Claims

1. A suprachoroidal injection device, characterized in that, The device comprises a silicone ring, a mounting head base, a needle tube, a needle seat, a rubber plug, a first syringe, a first plunger, a second syringe and a second plunger. The front end of the first plunger is connected to the rubber plug, the first syringe is provided with a drug injection cavity, the front end of the first plunger extends into the drug injection cavity from the rear end of the first syringe, the rubber plug is in sealed sliding connection with the drug injection cavity, the needle tube is mounted on the needle seat, the needle seat is arranged at the front end of the first syringe, the needle tube is in communication 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 a suction cavity, the first syringe is arranged in the suction cavity, the outer side wall of the first syringe is in sealed sliding connection with the suction cavity. The suprachoroidal injection device further comprises a limiting guide component fixed to the inner side wall of the second syringe, the second plunger is fixed to the inner side wall of the limiting guide component, the first syringe slides along the second plunger, and the limiting guide component limits the sliding stroke of the first syringe. When the silicone ring is attached to the eyeball, the first syringe is pulled out of the second syringe, the negative pressure in the suction cavity causes the silicone ring to be adsorbed to the eyeball, and the needle tip of the needle tube pierces the sclera to the choroid of the eyeball.

2. The suprachoroidal injection device of claim 1, wherein, The mounting head base comprises a first gear adjusting valve and a second gear adjusting valve, the second gear adjusting valve is arranged in the first gear adjusting valve, the needle seat is arranged in the second gear adjusting valve, and the silicone ring is arranged on the first gear adjusting valve.

3. The suprachoroidal injection device of claim 2, wherein, The silicone ring is in the shape of a cylinder, the front end of the silicone ring is provided with a funnel-shaped adsorption groove, and the needle tip of the needle tube is located in the funnel-shaped adsorption groove; the rear end of the silicone ring is provided with a matching groove, the front end of the first gear adjusting valve is provided with a matching protrusion, and the matching groove is in matching connection with the matching protrusion.

4. The suprachoroidal injection device of claim 2, wherein, The first gear adjusting valve is provided with a gear protrusion, a first adjusting thread and a hollow groove, the second gear adjusting valve is provided with a third sealing ring, a gear shifting protrusion, a blocking part and a second adjusting thread, the third sealing ring is fixed to the outer surface of the second gear adjusting valve, the second gear adjusting valve is in sealed connection with the inner surface of the first gear adjusting valve through the third sealing ring, the gear shifting protrusion is in positioning and clamping connection with the gear protrusion, the second adjusting thread is in threaded connection with the first adjusting thread, and the blocking part is arranged in the hollow groove and is limited to slide in the hollow groove.

5. The suprachoroidal injection device of claim 2, wherein, The outer side wall of the needle seat is provided with a fourth sealing ring, and the needle seat is in sealed connection with the inner surface of the second gear adjusting valve through the fourth sealing ring.

6. The suprachoroidal injection device of claim 1, wherein, The front end of the first syringe is provided with a vent groove structure, the outer side wall of the vent groove structure is provided with a sealing thread, and the sealing thread is in sealed sliding connection with the suction cavity.

7. The suprachoroidal injection device of claim 1, wherein, 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 in clamped connection 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 in sealing connection with 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 in sealing connection with the inner side wall of the second core rod through the first sealing ring.

8. The suprachoroidal injection device of claim 1, wherein, The suprachoroidal injection device further comprises a gas pressure display device, the outer side wall of the second syringe is further provided with a side wall hole in communication with the air extraction cavity, and the gas pressure display device is installed on the side wall hole and used for displaying the gas pressure in the air extraction cavity.

9. The suprachoroidal injection device of claim 8, wherein, The gas pressure display device comprises a passage one, an adjusting knob, a pressure valve, a passage two and a digital display, the pressure valve is arranged on the digital display, the adjusting knob is arranged on the pressure valve, the passage one and the passage two are arranged on the two sides of the digital display, and the passage one is connected with the side wall hole; or the gas pressure display device comprises a negative pressure indicator.

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