Injection device

Abstract

The utility model belongs to the technical field of injection instruments, and discloses an injection device. The injection device comprises a shell, an adjusting part, a needle tube and an extension tube, the shell extends in the first direction and is hollow, an opening is formed in the peripheral wall of the shell in the first direction, a plurality of clamping grooves are formed in the inner wall of the shell in the circumferential direction of the shell, and a first through hole is formed in the first end of the shell; the adjusting part comprises a clamping part, the clamping part enters the shell through the opening and is clamped in one of the clamping grooves, and the clamping part can be clamped with different clamping grooves so as to drive the adjusting part to change the position in the first direction; the needle tube is arranged at the first end of the shell in the first direction and communicates with the interior of the shell through the first through hole. The extension tube penetrates through the needle tube and is connected with the adjusting part, and the position of the adjusting part can be changed to drive the extension tube to adjust the length of the extension tube extending out of the needle tube. Through gear adjustment of the extension tube, the extending distance of the extension tube from the needle tube is more accurate, and the safety of the subretinal injection technology is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection device technology, and in particular to an injection device. Background Technology

[0002] Subretinal injection, as a novel drug delivery route, enables the precise delivery of therapeutic drugs into the subretinal space, and is used in ophthalmic surgery to treat retinopathy and related retinal diseases. Subretinal drug delivery has become an effective method. In existing technologies, subretinal injection needles consist of a fixed-length metal tube and an extension tube, which are manually inserted and injected using the metal tube and extension tube as carriers.

[0003] Because subretinal injection requires extremely high accuracy in determining the optimal injection site, it demands exceptional professional skills and precise hand control from the operator. Improper operation may lead to complications such as retinal detachment and hemorrhage, or damage to structures from the anterior segment to the posterior segment of the eye, posing medical risks. Utility Model Content

[0004] The purpose of this invention is to provide an injection device to address the problem that the existing subretinal injection technique requires extremely high professional skills and precise hand control from the operator. Improper operation may lead to complications such as retinal detachment and hemorrhage, or damage to the structures from the anterior segment to the posterior segment of the eye, posing medical risks. This invention reduces the difficulty of the subretinal injection technique and improves its safety.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An injection device is provided, comprising:

[0007] A housing, the housing extending along a first direction and being hollow inside, the housing having an opening on its peripheral wall along the first direction, the housing having a slot on its inner wall along the circumference of the housing, a plurality of slots being provided along the first direction, and a first through hole being provided at the first end of the housing;

[0008] An adjusting member, the adjusting member including a snap-fit ​​part, the snap-fit ​​part entering the housing through the opening and snapping into one of the slots, the snap-fit ​​part being able to snap into different slots, thereby driving the adjusting member to change position along the first direction;

[0009] A needle tube, which is disposed at the first end of the housing along the first direction and communicates with the interior of the housing through the first through hole;

[0010] An extension tube is inserted into the needle tube and connected to the adjusting member. Changing the position of the adjusting member can adjust the length of the extension tube extending out of the needle tube.

[0011] As an optional technical solution for the injection device, the injection device further includes a liquid pipeline. A second through hole is provided at the second end of the housing. The liquid pipeline can enter the interior of the housing through the second through hole and connect with the adjusting member. The extension tube is connected to the liquid pipeline.

[0012] As an optional technical solution for the injection device, the first through hole and the second through hole

[0013] As an optional technical solution for the injection device, the injection device further includes a connecting tube, which is disposed on the adjusting member, and its two ends are respectively connected to the extension tube and the liquid pipeline.

[0014] As an optional technical solution for the injection device, the diameter of the extension tube is smaller than the diameter of the liquid pipeline, the connecting tube is a reducing tube, and the ends of both the extension tube and the liquid pipeline are placed inside the connecting tube and are tightly attached to the inner wall of the connecting tube.

[0015] As an optional technical solution for the injection device, the adjusting member is provided with a connecting hole along the first direction, and the connecting tube is placed in the connecting hole and is interference-fitted with the connecting hole.

[0016] As an optional technical solution for the injection device, the locking part is configured as a stepped cylinder, the connecting hole is provided in the locking part, and the depth of the connecting hole along the first direction is equal to the maximum diameter of the locking part.

[0017] As an optional technical solution for the injection device, the free end of the liquid line is provided with a 6% Luer conical connector structure for connection with a standard syringe.

[0018] As an optional technical solution for the injection device, the adjusting member further includes a push-pull part, which extends out of the opening and is placed outside the housing. Applying force to the push-pull part can drive the adjusting member to move along the first direction.

[0019] As an optional technical solution for the injection device, the push-pull part is configured as an arc-shaped plate.

[0020] The beneficial effects of this utility model are:

[0021] This application discloses an injection device, including a housing, an adjusting component, a needle tube, and an extension tube. The housing extends along a first direction and is hollow inside. An opening is provided on the peripheral wall of the housing along the first direction, and multiple slots are provided on the inner wall of the housing along the circumference of the housing. A first through hole is provided at the first end of the housing. The adjusting component includes a locking part that enters the housing through the opening and locks into one of the slots. The locking part can lock into different slots, thereby causing the adjusting component to change position along the first direction. The needle tube is located at the first end of the housing along the first direction and communicates with the interior of the housing through the first through hole. The extension tube passes through the needle tube and is connected to the adjusting component. Changing the position of the adjusting component can adjust the length of the extension tube extending from the needle tube. By locking the locking part into different slots, the adjusting component can be adjusted in stages, thereby causing the extension tube to be adjusted in stages. Changing the interval between the slots can change the adjustment distance of the extension tube, making the distance the extension tube extends from the needle tube more precise, reducing the difficulty of subretinal injection technology and improving the safety of subretinal injection technology. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of the injection device provided in this embodiment of the utility model;

[0024] Figure 2 This is a cross-sectional view of the injection device provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 10. Housing; 11. Opening; 12. Slot;

[0027] 20. Adjusting component; 21. Snap-fit ​​part; 22. Push-pull part;

[0028] 30. Needle; 40. Extension tube; 50. Liquid tubing; 60. Connecting tube; 70. Connector structure. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] Subretinal drug delivery has become an effective method. Current technology involves subretinal injection needles consisting of a fixed-length metal tube and an extension tube, which are manually inserted and injected to locate the drug. Because subretinal injection requires extremely high accuracy in determining the optimal injection site, it demands exceptional skill and precise hand control from the operator. Improper operation can lead to complications such as retinal detachment and hemorrhage, or damage to structures from the anterior to posterior segments of the eye, posing significant medical risks.

[0034] To address the aforementioned problems, this embodiment provides an injection device, see reference. Figure 1 and Figure 2 It includes a housing 10, an adjusting component 20, a needle tube 30, and an extension tube 40.

[0035] Specifically, the housing 10 extends along a first direction and is hollow inside. An opening 11 is provided on the peripheral wall of the housing 10 along the first direction. A plurality of slots 12 are provided on the inner wall of the housing 10 along its circumference. A first through hole is provided at the first end of the housing 10. In this embodiment, the housing 10 is configured as a variable-diameter cylinder, with the smaller diameter cylinder serving as the operating position and the larger diameter cylinder as the gripping position. The opening 11 is located at the operating position. The slots 12 can be arranged around the inner wall of the housing 10, or they can be located on the inner wall of the housing 10 opposite to the opening 11. In this embodiment, the slots 12 are V-shaped grooves.

[0036] Furthermore, the adjusting member 20 includes a locking portion 21, which enters the housing 10 through the opening 11 and engages with one of the slots 12. The locking portion 21 can engage with different slots 12, thereby causing the adjusting member 20 to change position along the first direction. Specifically, the locking portion 21 is a rod, and its end is provided with a V-shaped tip. Specifically, the width of the opening 11 is the same as the width of the locking portion 21 to limit the offset of the locking portion 21 during movement.

[0037] Specifically, the adjusting member 20 also includes a push-pull portion 22, which extends from the opening 11 and is positioned outside the housing 10. Applying force to the push-pull portion 22 can move the adjusting member 20 along a first direction. In this embodiment, the push-pull portion 22 is configured as an arc-shaped plate, and the operator pushes and pulls the arc-shaped plate by placing their fingers on it. In other embodiments, the push-pull portion 22 can be configured as a rod. In other embodiments, the push-pull portion 22 can be driven by an electric push rod, improving the automation level of the injection device. In this embodiment, the locking portion 21 and the push-pull portion 22 are perpendicular to each other.

[0038] Furthermore, the needle tube 30 is disposed at the first end of the housing 10 along the first direction and communicates with the interior of the housing 10 through the first through hole; the extension tube 40 is inserted into the needle tube 30 and connected to the adjusting member 20, and the adjustment member 20 can adjust the length of the extension tube 40 extending out of the needle tube 30 by changing its position. Specifically, the needle tube 30 has a standard outer diameter size, such as 23G, 25G, etc.

[0039] In actual operation, the needle 30 first enters the eyeball, and after reaching the designated position, the extension tube 40 is pushed out from the end of the needle 30 by the adjusting member 20, precisely extending under the retina for injection. The adjusting member 20 is adjusted in stages by engaging with different slots 12 through the locking part 21, thereby driving the extension tube 40 to adjust in stages. Changing the interval between the slots 12 changes the adjustment distance of the extension tube 40, making the extension tube 40 extend more precisely from the needle 30, reducing the difficulty of subretinal injection technology and improving its safety.

[0040] Furthermore, the injection device also includes a liquid conduit 50. A second through-hole is provided at the second end of the housing 10, through which the liquid conduit 50 enters the interior of the housing 10 and connects to the adjusting member 20. The extension tube 40 communicates with the liquid conduit 50. Specifically, the first and second through-holes are coaxial. In this embodiment, the injection device also includes a connecting tube 60, which is disposed on the adjusting member 20. Both ends of the connecting tube 60 are connected to the extension tube 40 and the liquid conduit 50, respectively.

[0041] Specifically, the diameter of the extension tube 40 is smaller than the diameter of the liquid pipeline 50, and the connecting tube 60 is a reducer. The ends of both the extension tube 40 and the liquid pipeline 50 are placed inside the connecting tube 60 and are tightly fitted against its inner wall. The reducing tube 60 provides a buffer when liquid is transported through the liquid pipeline 50, reducing the pressure when liquid enters the extension tube 40. In other embodiments, the extension tube 40 can be directly inserted into the end of the liquid pipeline 50, and a rubber gasket can be placed between the extension tube 40 and the liquid pipeline 50 to prevent liquid leakage.

[0042] In this embodiment, the adjusting member 20 is provided with a connecting hole along the first direction, and the connecting tube 60 is placed in the connecting hole and has an interference fit with the connecting hole. In other embodiments, the connecting tube 60 and the adjusting member 20 can be glued together, etc. Specifically, the connecting hole is provided in the snap-fit ​​portion 21. Further, in order to increase the reliability of the interference fit between the connecting tube 60 and the adjusting member 20, the snap-fit ​​portion 21 is set as a stepped cylinder, and the depth of the connecting hole along the first direction is equal to the maximum diameter of the snap-fit ​​portion 21.

[0043] Furthermore, since the liquid pipeline 50 moves with the adjusting member 20, a partition is provided inside the housing 10 to increase support for the liquid pipeline 50. The partition divides the interior of the housing 10 into a first cavity and a second cavity. The adjusting member 20 is located in the first cavity. A third through hole is provided through the partition, through which the liquid pipeline 50 passes and connects to the adjusting member 20. The sidewall of the third through hole not only supports the liquid pipeline 50 but also restricts its movement along the first direction to prevent deviation, thus preventing the liquid pipeline 50 from disengaging from the connecting pipe 60. In this embodiment, the second and third through holes have the same diameter and are both clearance-fitted with the liquid pipeline 50.

[0044] Furthermore, the free end of the liquid line 50 is equipped with a 6% Luer conical connector structure 70 for connection with a standard syringe, improving the versatility and compatibility of the injection device. It should be noted that since the 6% Luer conical connector structure 70 is a well-established technology, its structure and connection principle will not be described here.

[0045] 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 injection device, characterized in that, include: A housing (10) extends along a first direction and is hollow inside. An opening (11) is provided on the peripheral wall of the housing (10) along the first direction. A slot (12) is provided on the inner wall of the housing (10) along the circumference of the housing (10). Multiple slots (12) are provided along the first direction. A first through hole is provided at the first end of the housing (10). Adjusting member (20), the adjusting member (20) includes a snap-fit ​​part (21), the snap-fit ​​part (21) enters the housing (10) through the opening (11) and snaps into one of the slots (12), the snap-fit ​​part (21) can snap into different slots (12), thereby driving the adjusting member (20) to change position along the first direction; A needle tube (30) is disposed at the first end of the housing (10) along the first direction and communicates with the interior of the housing (10) through the first through hole; An extension tube (40) is inserted into the needle tube (30) and connected to the adjusting member (20). The adjusting member (20) can adjust the length of the extension tube (40) extending out of the needle tube (30) by changing its position.

2. The injection device according to claim 1, characterized in that, The injection device further includes a liquid pipeline (50), and a second through hole is provided at the second end of the housing (10). The liquid pipeline (50) can enter the interior of the housing (10) through the second through hole and be connected to the adjusting member (20). The extension tube (40) is connected to the liquid pipeline (50).

3. The injection device according to claim 2, characterized in that, The first through hole and the second through hole are coaxial.

4. The injection device according to claim 2, characterized in that, The injection device further includes a connecting tube (60), which is disposed on the adjusting member (20). Both ends of the connecting tube (60) are connected to the extension tube (40) and the liquid pipeline (50), respectively.

5. The injection device according to claim 4, characterized in that, The diameter of the extension tube (40) is smaller than the diameter of the liquid pipeline (50), the connecting tube (60) is a reducing tube, and the ends of the extension tube (40) and the liquid pipeline (50) are both placed inside the connecting tube (60) and are tightly attached to the inner wall of the connecting tube (60).

6. The injection device according to claim 4, characterized in that, The adjusting member (20) is provided with a connecting hole along the first direction, and the connecting pipe (60) is placed in the connecting hole and is interference-fitted with the connecting hole.

7. The injection device according to claim 6, characterized in that, The snap-fit ​​part (21) is configured as a stepped cylinder, and the connecting hole is provided in the snap-fit ​​part (21). The depth of the connecting hole along the first direction is equal to the maximum diameter of the snap-fit ​​part (21).

8. The injection device according to claim 2, characterized in that, The free end of the liquid line (50) is provided with a 6% Luer conical connector structure (70) for connection to a standard syringe.

9. The injection device according to any one of claims 1-8, characterized in that, The adjusting member (20) further includes a push-pull part (22), which extends out of the opening (11) and is placed outside the housing (10). Applying force to the push-pull part (22) can drive the adjusting member (20) to move along the first direction.

10. The injection device according to claim 9, characterized in that, The push-pull part (22) is configured as an arc-shaped plate.

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