Intraocular injection assembly

Abstract

The utility model provides an intraocular injection assembly, and relates to the technical field of medical instruments. The intraocular injection assembly comprises an injection needle seat and an injection needle; a plurality of first auxiliary channels which extend in the axial direction of the injection needle base and are sequentially communicated with one another are arranged in the injection needle base, the diameters of the first auxiliary channels are sequentially reduced in the direction from the first end to the second end of the injection needle base, and the first auxiliary channels are matched to form a first injection channel; at least two second auxiliary channels which extend in the axial direction of the injection needle and are sequentially communicated with one another are arranged in the injection needle, the diameters of the second auxiliary channels are sequentially reduced in the direction from the first end to the second end of the injection needle, and the second auxiliary channels are matched to form a second injection channel; the injection needle is connected to the second end of the injection needle base, and the first end of the injection needle base can be connected to an outlet of an external injector so that the second injection channel can be communicated with the external injector through the first injection channel. According to the intraocular injection assembly, the flowing speed is increased, the injection time is shortened, and the infection risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially, relates to an intraocular injection assembly. BACKGROUND

[0002] Intraocular injection filling surgery is a common method in retinal disease, age-related macular degeneration, endophthalmitis and other surgeries. Especially in retinal disease surgery, the syringe needs to be inserted into the pars plana, and silicone oil or heavy water is injected into the vitreous cavity. The filled silicone oil or heavy water pushes the retina back to its original position and closes the hole, keeping the retina stable.

[0003] The existing injection needle has a thin and long inner cavity, so when injecting and filling silicone oil or heavy water, the fluid resistance in the injection needle is large, which leads to a long injection time of silicone oil or heavy water, thereby prolonging the operation time and possibly increasing the risk of eye infection in patients. UTILITY MODEL CONTENT

[0004] The utility model aims to provide an intraocular injection assembly that improves flow speed, shortens injection time, and reduces the risk of infection.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The intraocular injection assembly comprises:

[0007] The injection needle seat is provided with a plurality of first auxiliary channels that extend axially along the injection needle seat and are sequentially connected to each other. From the first end of the injection needle seat to the second end of the injection needle seat, the diameters of the plurality of first auxiliary channels decrease sequentially and cooperate to form a channel that penetrates the injection needle seat along the axial direction of the injection needle seat.

[0008] The injection needle head is provided with at least two second auxiliary channels that extend axially along the injection needle head and are sequentially connected to each other. From the first end of the injection needle head to the second end of the injection needle head, the diameters of the second auxiliary channels decrease sequentially and cooperate to form a second injection channel that penetrates the injection needle head along the axial direction of the injection needle head.

[0009] The first end of the injection needle head is connected to the second end of the injection needle seat, and the first end of the injection needle seat can be connected to the outlet of an external syringe, so that the second injection channel communicates with the external syringe through the first injection channel.

[0010] As a further technical solution, from the first end of the injection needle hub to the second end of the injection needle hub, a plurality of the first auxiliary channels are sequentially configured as a Luer connector conical channel, a transition channel and a first connecting channel, wherein the Luer connector conical channel can communicate with the outlet of an external syringe;

[0011] From the first end of the injection needle to the second end of the injection needle, each of the second auxiliary channels is sequentially configured as a second connecting channel and a standard injection channel. The second end of the injection needle is inserted into the injection needle seat from the Luer connector conical channel and extends out of the first connecting channel so that the first injection channel and the second injection channel are connected.

[0012] As a further technical solution, the Luer connector conical channel and the transition channel are smoothly connected. From the first end of the injection needle to the second end of the injection needle, the first end of the injection needle is provided with a guide surface that is inclined towards the axis of the injection needle. The guide surface is smoothly connected to the inner wall of the first injection channel.

[0013] As a further technical solution, from the first end of the injection needle hub to the second end of the injection needle hub, the inner diameter of the first connecting channel gradually decreases, and the transition channel smoothly transitions to the first connecting channel;

[0014] After the injection needle is inserted into the injection needle hub, the outer wall of the first end of the injection needle is press-fitted with the inner wall of the first connecting channel, and the end face of the first end of the injection needle is set as the guide surface.

[0015] As a further technical solution, an abutment step is provided between the transition channel and the first connecting channel, and the first end of the injection needle is provided with an abutment flange that can abut against the abutment step, and the end face of the abutment flange away from the standard injection channel is set as the guide surface.

[0016] As a further technical solution, a sealing groove is provided on one of the abutting step and the abutting flange near the end face of the abutting step, and a sealing convex rail is provided on the other. Both the sealing groove and the sealing convex rail extend in a ring shape along the circumference of the injection needle seat. When the abutting flange abuts against the abutting step, the sealing convex rail is engaged in the sealing groove.

[0017] And / or, when the abutting flange abuts against the abutting step, a sealing ring is provided between the abutting step and the abutting flange.

[0018] As a further technical solution, a limiting groove is provided on one of the abutting step and the abutting flange, and a corresponding limiting block is provided on the other. When the injection needle is inserted into the injection needle seat, the limiting block is limited and engaged with the limiting groove.

[0019] As a further technical solution, the outer wall of the first end of the injection needle is bonded to the inner wall of the first connecting channel.

[0020] As a further technical solution, the injection needle and the injection needle seat are integrally formed.

[0021] As a further technical solution, the intraocular injection assembly also includes an injection needle cap, which can be detachably fitted onto the injection needle hub.

[0022] Compared with the prior art, the intraocular injection component provided by this utility model has the following technical advantages:

[0023] Because the diameters of the multiple first auxiliary channels decrease sequentially from the first end to the second end of the injection needle hub, and the diameters of the second auxiliary channels decrease sequentially from the first end to the second end of the injection needle tip, both the first and second injection channels are variable-diameter channels with progressively decreasing diameters along the direction of the injection needle tip within the injection needle hub. Therefore, during the injection of silicone oil or heavy water, as the silicone oil or heavy water flows sequentially from the external syringe through the first and second injection channels, the silicone oil flows from the larger diameter channel through the smaller diameter channel, reducing injection resistance, thereby shortening the injection time and lowering the risk of infection. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of the first embodiment of the intraocular injection assembly provided in this utility model;

[0026] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0027] Figure 3 This is a cross-sectional view of a second embodiment of the intraocular injection assembly provided in this utility model.

[0028] Figure 4 yesFigure 3 A magnified view of a section at point B in the middle;

[0029] Figure 5 This is a cross-sectional view of the injection needle hub in the intraocular injection assembly provided in this embodiment of the utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the injection needle in the intraocular injection assembly provided in this embodiment of the utility model;

[0031] Figure 7 yes Figure 6 A magnified view of a section at point C;

[0032] Figure 8 This is a disassembly diagram of the intraocular injection assembly provided in this embodiment of the utility model.

[0033] In the picture:

[0034] 100. Injection needle hub; 110. Luer connector conical channel; 120. Transition channel; 130. First connecting channel; 101. Abutment step; 102. Sealing groove;

[0035] 200. Injection needle; 210. Second connection channel; 220. Standard injection channel; 201. Abutment flange; 202. Sealing convex rail; 203. Limiting block;

[0036] 310. Sealing ring;

[0037] 400. Injection needle cap. Detailed Implementation

[0038] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0039] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0041] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0042] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0043] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0044] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0045] Combination Figures 1 to 8 As shown, the intraocular injection assembly provided in this embodiment is used to inject fluids such as silicone oil or heavy water into the eye, and during the injection process, it increases the flow rate, shortens the injection time, and reduces the risk of infection. Specifically, the intraocular injection assembly includes an injection needle hub 100 and an injection needle 200. The injection needle hub 100 has multiple first auxiliary channels extending axially along the needle hub 100 and interconnected sequentially. The diameters of the multiple first auxiliary channels decrease sequentially from the first end to the second end of the needle hub 100, forming a second injection channel that penetrates the needle hub 100 axially. The injection needle 200 has at least two second auxiliary channels extending axially along the needle head 200 and interconnected sequentially. The diameters of the second auxiliary channels decrease sequentially from the first end to the second end of the needle head 200, forming a second injection channel that penetrates the needle head 200 axially. The first end of the injection needle 200 is connected to the second end of the injection needle hub 100, and the first end of the injection needle hub 100 can be connected to the outlet of an external syringe (not shown in the figure) so that the second injection channel communicates with the external syringe through the first injection channel.

[0046] Because the diameters of the multiple first auxiliary channels decrease sequentially from the first end to the second end of the injection needle holder 100, and the diameters of the second auxiliary channels decrease sequentially from the first end to the second end of the injection needle 200, both the first and second injection channels are variable-diameter channels with progressively decreasing diameters along the direction of the injection needle 200 in the injection needle holder 100. Therefore, during the injection of silicone oil or heavy water, when the silicone oil or heavy water flows sequentially from the external syringe through the first and second injection channels, the silicone oil flows from the larger diameter channel through the smaller diameter channel, reducing injection resistance, thereby shortening the injection time and reducing the risk of infection.

[0047] Specifically, refer to the outflow rate (FlowrateFR) formula:

[0048]

[0049] Wherein, Flowrate is the outflow rate, pressure difference is the pressure difference, η is the density of the injected fluid, L is the overall length of the injection channel, and r is the inner diameter of the injection channel. From the above formula, it can be seen that the outflow rate is directly proportional to the pressure difference and inversely proportional to the resistance within the injection channel. The pressure difference depends on the positive pressure level of the injection assembly and the intraocular pressure. The resistance within the injection channel depends on the density of the injected fluid, the overall length of the needle injection channel, and the inner diameter of the injection channel. Combining the formula, it can be concluded that when the pressure difference remains constant, the smaller the inner diameter of the injection channel and the longer the overall length of the needle injection channel, the greater the resistance within the injection channel and the lower the fluid outflow rate. Therefore, in this embodiment, by repeatedly changing the diameter, the resistance within the injection channel is reduced, and the fluid outflow rate is increased, i.e., the injection speed is increased.

[0050] In this embodiment, the first injection channel is described as consisting of three sequentially arranged variable-diameter sections, and the second injection channel is described as consisting of two sequentially arranged variable-diameter sections. In other embodiments, the number of variable-diameter sections constituting the first injection channel can be set to two, four, five, etc., according to specific needs; the number of variable-diameter sections constituting the second injection channel can be set to three, four, five, etc., according to specific needs.

[0051] Specifically, from the first end of the injection needle hub 100 to the second end of the injection needle hub 100, multiple first auxiliary channels are sequentially configured as a Luer connector conical channel 110, a transition channel 120, and a first connecting channel 130. The Luer connector conical channel 110 can communicate with the outlet of an external syringe. The Luer connector conical channel 110 is a standard connecting channel to facilitate connection to the outlet of any size external syringe of the injection needle hub 100, thereby improving the applicability of the intraocular injection assembly. By setting the transition channel 120, the inner diameter of the first injection channel gradually decreases, avoiding abrupt changes in the inner diameter and ensuring the flow effect of fluid in the first injection channel during injection. From the first end of the injection needle 200 to the second end of the injection needle 200, each second auxiliary channel is sequentially configured as a second connecting channel 210 and a standard injection channel 220. The second end of the injection needle 200 is inserted into the injection needle hub 100 from the Luer connector conical channel 110 and extends out of the first connecting channel 130, so that the first injection channel and the second injection channel are connected. The second connecting channel 210 is connected to the first connecting channel 130. The diameter of the standard injection channel 220 can be set according to actual needs so that the outer diameter of the injection needle 200 area corresponding to the standard injection channel 220 is the standard outer diameter size. For example, the outer diameter of the injection needle 200 area corresponding to the standard injection channel 220 can be 20G, 23G, 25G, 27G, etc., so as to facilitate its use in conjunction with other ophthalmic surgical instruments.

[0052] Preferably, the Luer connector conical channel 110 and the transition channel 120 are smoothly connected. From the first end of the injection needle 200 to the second end of the injection needle 200, the first end of the injection needle 200 is provided with a guide surface (not shown in the figure) that is inclined towards the axis of the injection needle 200. The guide surface is smoothly connected to the inner wall of the first injection channel. By smoothly connecting the Luer connector conical channel 110 and the transition channel 120, and by smoothly connecting the guide surface to the inner wall of the first injection channel, the resistance of the injection needle hub 100 and the injection needle 200 themselves to the injected fluid is reduced, thereby further improving the injection speed.

[0053] In this embodiment, the injection needle hub 100 and the injection needle 200 can be integrally molded. This configuration eliminates the need for assembly during use, improving processing convenience and enhancing the connection strength and stability between the two. Alternatively, the injection needle hub 100 and the injection needle 200 can be molded separately. After molding, the injection needle 200 is connected to the second end of the injection needle hub 100. This configuration reduces the manufacturing difficulty of the injection components, thereby improving processing efficiency and reducing processing costs.

[0054] After the injection needle hub 100 and the injection needle tip 200 are separately formed, the connection method for connecting the injection needle tip 200 to the second end of the injection needle hub 100 is provided in this embodiment in three ways, specifically:

[0055] In the first case, from the first end of the injection needle holder 100 to the second end of the injection needle holder 100, the inner diameter of the first connecting channel 130 gradually decreases, and the transition channel 120 is smoothly connected to the first connecting channel 130; after the injection needle 200 is inserted into the injection needle holder 100, the outer wall of the first end of the injection needle 200 is interference-fitted with the inner wall of the first connecting channel 130, and the end face of the first end of the injection needle 200 is set as a guide surface.

[0056] Specifically, the transition channel 120 and the first connecting channel 130 are smoothly connected, and the guide surface is smoothly connected to the inner wall of the first injection channel. This reduces the resistance to the injected fluid at the connection between the transition channel 120 and the first connecting channel 130, and at the connection between the first injection channel and the second connecting channel 210, thereby further improving injection efficiency. From the first end of the injection needle holder 100 to the second end of the injection needle holder 100, the inner diameter of the first connecting channel 130 gradually decreases. From the first end of the injection needle 200 to the second end of the injection needle 200, the outer diameter of the injection needle 200 can be set to gradually decrease or remain constant. After the second end of the injection needle 200 is inserted into the injection needle holder 100 through the first injection channel, the outer wall of the first end of the injection needle 200 is press-fitted with the inner wall of the first connecting channel 130 to fix the injection needle 200 to the second end of the injection needle holder 100.

[0057] In the second embodiment, an abutment step 101 is provided between the transition channel 120 and the first connecting channel 130. The first end of the injection needle 200 is provided with an abutment flange 201 that abuts against the abutment step 101. The abutment flange 201 abuts against the abutment step 101, thereby positioning the injection needle 200 at the second end of the injection needle holder 100. By setting the end face of the abutment flange 201 away from the standard injection channel 220 as a guide surface, a smooth transition connection between the second connecting channel 210 and the transition channel 120 is achieved, thereby reducing the flow resistance of the fluid to be injected at the abutment flange 201. Furthermore, in this embodiment, the inner diameter of the first connecting channel 130 can be set to gradually decrease or remain constant from the first end to the second end of the injection needle holder 100, and the outer diameter of the injection needle 200 is correspondingly set to the inner diameter of the first connecting channel 130.

[0058] Furthermore, a sealing groove 102 is provided on one of the abutment step 101 and the abutment flange 201 near the end face of the abutment step 101, and a sealing convex rail 202 is provided on the other. Both the sealing groove 102 and the sealing convex rail 202 extend in a ring shape along the circumference of the injection needle seat 100. When the abutment flange 201 abuts against the abutment step 101, the sealing convex rail 202 is engaged in the sealing groove 102.

[0059] Combination Figure 1 and Figure 2 As shown, in this embodiment, the sealing groove 102 is disposed on the abutment step 101, and the sealing convex rail 202 is disposed on the end face of the abutment flange 201 near the abutment step 101. The sealing convex rail 202 is engaged in the sealing groove 102 to improve the sealing between the first injection channel and the second injection channel.

[0060] Or combination Figure 3 and Figure 4 As shown, when the abutting flange 201 abuts against the abutting step 101, a sealing ring 310 is provided between the abutting step 101 and the abutting flange 201. By providing the sealing ring 310, the sealing performance between the first injection channel and the second injection channel is improved.

[0061] In some other embodiments, a sealing groove 102 is provided on the abutment step 101, and a sealing convex rail 202 is provided on the end face of the abutment flange 201 near the abutment step 101. At the same time, a sealing rubber ring 310 is provided between the abutment step 101 and the abutment flange 201.

[0062] Furthermore, a limiting groove (not shown in the figure) is provided on one of the abutting step 101 and the abutting flange 201, and a corresponding limiting block 203 is provided on the other. When the injection needle 200 is inserted into the injection needle seat 100, the limiting block 203 is limited and engaged with the limiting groove.

[0063] Specific combination Figure 6 and Figure 7 As shown, in this embodiment, the limiting block 203 is disposed on the end face of the abutting flange 201 near the abutting step 101, and along the circumference of the abutting flange 201, a plurality of limiting blocks 203 are spaced apart on the abutting flange 201, and a plurality of limiting slots are correspondingly spaced apart on the abutting step 101. When the abutting flange 201 abuts against the abutting step 101, the plurality of limiting blocks 203 are correspondingly engaged with the plurality of limiting slots, thereby limiting the relative rotation of the injection needle hub 100 and the injection needle 200 in the circumferential direction, avoiding relative rotation between the injection needle 200 and the injection needle hub 100, thereby ensuring the effectiveness of the intraocular injection assembly.

[0064] In some other embodiments, the limiting block 203 may also be disposed on the outer wall of the first end of the injection needle 200, and the limiting groove may be disposed on the inner wall of the first injection channel.

[0065] The third method involves bonding the outer wall of the first end of the injection needle 200 to the inner wall of the first connecting channel 130. By bonding the injection needle 200 to the second end of the injection needle seat 100, the second injection channel is connected to the external syringe through the first injection channel.

[0066] Preferably, the intraocular injection assembly further includes an injection needle cap 400, which is detachably fitted onto the injection needle holder 100. By providing the injection needle cap 400, in the non-working state, the injection needle cap 400, fitted onto the injection needle holder 100, protects the injection needle holder 100 and the injection needle 200, preventing damage to these components from external instruments and thus ensuring their effectiveness. Simultaneously, it prevents the injection needle 200 from pricking the operator, improving storage convenience and safety. In the working state, the injection needle cap 400 can be removed from the injection needle holder 100 for immediate injection, ensuring ease of use.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An intraocular injection assembly, characterized by The injection needle seat (100) is provided with a plurality of first auxiliary channels extending along the axial direction of the injection needle seat (100) and sequentially connected to each other, and the diameters of the plurality of first auxiliary channels sequentially decrease from the first end of the injection needle seat (100) to the second end of the injection needle seat (100), and the first injection channel is formed by the first auxiliary channels along the axial direction of the injection needle seat (100). The injection needle head (200) is provided with at least two second auxiliary channels extending along the axial direction of the injection needle head (200) and sequentially connected to each other, and the diameters of the second auxiliary channels sequentially decrease from the first end of the injection needle head (200) to the second end of the injection needle head (200), and the second injection channel is formed by the second auxiliary channels along the axial direction of the injection needle head (200). The first end of the injection needle head (200) is connected to the second end of the injection needle seat (100), and the first end of the injection needle seat (100) can be connected to the outlet of an external injector, so that the second injection channel communicates with the external injector through the first injection channel. From the first end of the injection needle seat (100) to the second end of the injection needle seat (100), the plurality of first auxiliary channels are sequentially provided as a luer taper channel (110), a transition channel (120), and a first connecting channel (130), and the luer taper channel (110) can communicate with the outlet of an external injector.

2. The intraocular injection assembly of claim 1, wherein, From the first end of the injection needle head (200) to the second end of the injection needle head (200), each second auxiliary channel is sequentially provided as a second connecting channel (210) and a standard injection channel (220), the second end of the injection needle head (200) is inserted into the injection needle seat (100) from the luer taper channel (110) and protrudes out of the first connecting channel (130), so that the first injection channel and the second injection channel are communicated. The luer taper channel (110) and the transition channel (120) are smoothly connected, and the first end of the injection needle head (200) is provided with a guide surface inclined towards the axis of the injection needle head (200) from the first end of the injection needle head (200) to the second end of the injection needle head (200), and the guide surface is smoothly connected with the inner wall of the first injection channel.

3. The intraocular injection assembly of claim 2, wherein, From the first end of the injection needle seat (100) to the second end of the injection needle seat (100), the inner diameter of the first connecting channel (130) gradually decreases, and the transition channel (120) is smoothly connected with the first connecting channel (130).

4. The intraocular injection assembly of claim 3, wherein, After the injection needle head (200) is inserted into the injection needle seat (100), the outer wall of the first end of the injection needle head (200) is interference fit with the inner wall of the first connecting channel (130), and the end face of the first end of the injection needle head (200) is provided as the guide surface. ​ 5. The intraocular injection assembly of claim 3, wherein, The transition channel (120) is provided with an abutting step (101), a first end of the injection needle (200) is provided with an abutting flange (201) capable of abutting with the abutting step (101), and an end face of the abutting flange (201) away from the standard injection channel (220) is provided as the guide face.

6. The intraocular injection assembly of claim 5, wherein, The abutting step (101) and the abutting flange (201) are provided with a sealing groove (102) on one of the end faces of the abutting step (101) and a sealing convex rail (202) on the other, the sealing groove (102) and the sealing convex rail (202) are both annular along the circumference of the injection needle seat (100), and when the abutting flange (201) abuts on the abutting step (101), the sealing convex rail (202) is clamped in the sealing groove (102). And / or, when the abutting flange (201) abuts on the abutting step (101), a sealing rubber ring (310) is arranged between the abutting step (101) and the abutting flange (201).

7. The intraocular injection assembly of claim 5, wherein, One of the abutting step (101) and the abutting flange (201) is provided with a limiting clamping groove, and the other is correspondingly provided with a limiting clamping block (203), when the injection needle (200) is inserted into the injection needle seat (100), the limiting clamping block (203) is clamped in the limiting clamping groove.

8. The intraocular injection assembly of claim 2, wherein, An outer wall of the first end of the injection needle (200) is bonded to an inner wall of the first connecting channel (130).

9. The intraocular injection assembly of claim 2, wherein, The injection needle (200) and the injection needle seat (100) are integrally formed.

10. The intraocular injection assembly of any of claims 1-9, wherein, The intraocular injection assembly further comprises an injection needle cap (400), which can be detachably sleeved on the injection needle seat (100).

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