Injection device

Abstract

The invention 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] The present invention relates to the technical field of injection equipment, and in particular to an injection device. Background Art

[0002] As a new drug delivery route, subretinal injection technology can accurately deliver therapeutic drugs to the subretinal space and is used in ophthalmic surgery to treat retinopathy and other related retinal diseases. Subretinal drug delivery has become an effective route. In the prior art, the subretinal injection needle includes a metal tube and an extension tube of fixed length, which are used as carriers for manual positioning, insertion and injection of drugs.

[0003] Since the subretinal injection technique requires extremely high accuracy in the optimal medication location, it also places extremely high demands on the operator's professional skills and precision of hand control. Improper operation may lead to complications such as retinal detachment and bleeding, or damage to the structures from the anterior segment to the posterior segment of the eye, posing a medical hazard. Summary of the invention

[0004] The purpose of the present invention is to provide an injection device to solve the problem that the subretinal injection technology in the prior art has extremely high requirements on the operator's professional skills and the accuracy of hand control. If the operation is improper, it may cause complications such as retinal detachment and hemorrhage, or damage the structure from the anterior segment to the posterior segment of the eye, posing a medical hazard. The difficulty of the subretinal injection technology is reduced and the safety of the subretinal injection technology is improved.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] An injection device is provided, comprising:

[0007] A shell, the shell extends along a first direction and is hollow inside, the shell peripheral wall is provided with an opening along the first direction, the shell inner wall is provided with a card slot along the circumference of the shell, a plurality of the card slots are provided along the first direction, and a first through hole is provided at a first end of the shell;

[0008] An adjusting member, the adjusting member comprising a clamping portion, the clamping portion enters into the housing through the opening and is clamped in one of the clamping slots, the clamping portion can be clamped in different clamping slots, thereby driving the adjusting member to change position along the first direction;

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

[0010] An extension tube is inserted into the needle tube and connected to the adjusting member. The adjusting member changes its position to drive the extension tube to adjust the length extending out of the needle tube.

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

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

[0013] As an optional technical solution of the injection device, the injection device further includes a connecting tube, the connecting tube is arranged on the adjusting member, and two ends of the connecting tube 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 the extension tube and the liquid pipeline are both placed in the connecting tube and tightly attached to the inner wall of the connecting tube.

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

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

[0017] As an optional technical solution for the injection device, the free end of the liquid pipeline is provided with a 6% Luer cone joint 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 portion extending from the opening and disposed outside the shell, and applying force to the push-pull portion can drive the adjusting member to move along the first direction.

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

[0020] Beneficial effects of the present invention:

[0021] The present application discloses an injection device, including a housing, an adjusting member, a needle tube and an extension tube, wherein the housing extends in a first direction and is hollow inside, an opening is arranged on the circumferential wall of the housing along the first direction, a slot is arranged on the inner wall of the housing along the circumference of the housing, a plurality of slots are arranged along the first direction, and a first through hole is arranged at the first end of the housing; the adjusting member includes a clamping part, the clamping part enters the housing through the opening and is clamped in one of the slots, the clamping part can be clamped with different slots, thereby driving the adjusting member to change position in the first direction; the needle tube is arranged at the first end of the housing along the first direction and is connected with the inside of the housing through the first through hole; the extension tube is arranged in the needle tube and connected with the adjusting member, and the adjustment member can drive the extension tube to adjust the length of the needle tube when the position is changed. By clamping the clamping part with different slots, the adjustment member can be adjusted in gears, thereby driving the extension tube to be adjusted in gears, and changing the interval between the slots can change the gear adjustment distance of the extension tube, so that the distance of the extension tube extending from the needle tube is more accurate, reducing the difficulty of the subretinal injection technique and improving the safety of the subretinal injection technique. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0023] Figure 1 is a schematic structural diagram of an injection device provided by an embodiment of the present invention;

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

[0025] In the figure:

[0026] 10. housing; 11. opening; 12. card slot;

[0027] 20. Adjusting member; 21. Clamping portion; 22. Push-pull portion;

[0028] 30. needle tube; 40. extension tube; 50. liquid pipeline; 60. connecting tube; 70. joint structure. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] Subretinal drug delivery has become an effective approach. In the prior art, the subretinal injection needle includes a metal tube and an extension tube of fixed length, which are used as carriers to manually position, insert, and inject drugs. Since subretinal injection technology has extremely high requirements for the accuracy of the optimal medication location, it has extremely high requirements for the operator's professional skills and hand control accuracy. Improper operation may cause complications such as retinal detachment and bleeding, or damage to the structures from the anterior segment to the posterior segment of the eye, posing medical risks.

[0034] To solve the above problems, this embodiment provides an injection device. Figure 1 and Figure 2 , including a shell 10, an adjusting member 20, a needle tube 30 and an extension tube 40.

[0035] Specifically, the shell 10 extends along the first direction and is hollow inside. The circumferential wall of the shell 10 is provided with an opening 11 along the first direction. The inner wall of the shell 10 is provided with a card slot 12 along the circumference of the shell 10. A plurality of card slots 12 are provided along the first direction. The first end of the shell 10 is provided with a first through hole. In this embodiment, the shell 10 is configured as a variable diameter cylinder, the cylinder with a small diameter is an operating station, the cylinder with a large diameter is a holding station, and the opening 11 is provided at the operating station. The card slot 12 can be arranged in a ring on the inner wall of the shell 10, or the card slot 12 can be arranged on the inner wall of the shell 10 opposite to the position of the opening 11. In this embodiment, the card slot 12 is configured as a V-shaped groove.

[0036] Further, the adjusting member 20 includes a clamping portion 21, which enters the housing 10 through the opening 11 and is clamped in one of the clamping slots 12. The clamping portion 21 can be clamped with different clamping slots 12, thereby driving the adjusting member 20 to change position along the first direction. Specifically, the clamping portion 21 is a rod, and a V-shaped tip is provided at the end of the clamping portion 21. Specifically, the width of the opening 11 is the same as the width of the clamping portion 21, so as to limit the displacement of the clamping portion 21 during the movement.

[0037] Specifically, the adjusting member 20 also includes a push-pull portion 22, which extends from the opening 11 and is placed outside the housing 10. Applying force to the push-pull portion 22 can drive the adjusting member 20 to move along the first direction. In this embodiment, the push-pull portion 22 is set as an arc-shaped plate, and the operator's fingers fit the arc-shaped plate and push and pull the arc-shaped plate. In other embodiments, the push-pull portion 22 can be set as a rod. In other embodiments, the push-pull portion 22 can be driven by an electric push rod to improve the automation of the injection device. In this embodiment, the clamping portion 21 and the push-pull portion 22 are perpendicular to each other.

[0038] Further, the needle tube 30 is arranged 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 passed through the needle tube 30 and connected to the adjustment member 20, and the adjustment member 20 changes its position to drive the extension tube 40 to adjust the length of the needle tube 30. Specifically, the needle tube 30 has a standard outer diameter size, such as 23G, 25G, etc.

[0039] In actual operation, the needle tube 30 first enters the eyeball, and after reaching the designated position, the extension tube 40 is pushed out from the end of the needle tube 30 through the adjusting member 20, and accurately extends into the subretina for injection. The adjustment member 20 is adjusted in steps by the engagement of the engaging portion 21 with different engaging slots 12, thereby driving the extension tube 40 to be adjusted in steps. Changing the interval between the engaging slots 12 can change the adjustment distance of the extension tube 40, making the distance that the extension tube 40 extends from the needle tube 30 more accurate, reducing the difficulty of the subretinal injection technique and improving the safety of the subretinal injection technique.

[0040] Further, the injection device further includes a liquid pipeline 50, and a second through hole is provided at the second end of the housing 10, through which the liquid pipeline 50 can enter the interior of the housing 10 and connect with the adjusting member 20, and the extension tube 40 is in communication with the liquid pipeline 50. Specifically, the first through hole and the second through hole are coaxial. In this embodiment, the injection device further includes a connecting tube 60, which is provided at the adjusting member 20, and the two ends of the connecting tube 60 are respectively in communication with the extension tube 40 and the liquid pipeline 50.

[0041] Specifically, the diameter of the extension tube 40 is smaller than the diameter of the liquid pipeline 50, the connecting tube 60 is a reducer, and the ends of the extension tube 40 and the liquid pipeline 50 are both placed in the connecting tube 60 and are in close contact with the inner wall of the connecting tube 60. The connecting tube 60 is set as a reducer, which can buffer when the liquid pipeline 50 transports the liquid and reduce the pressure of the liquid when it 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 set between the extension tube 40 and the liquid pipeline 50 to prevent liquid leakage.

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

[0043] Furthermore, since the liquid pipeline 50 moves with the adjustment member 20, in order to increase the support for the liquid pipeline 50, a partition is provided inside the housing 10, and the partition divides the inside of the housing 10 into a first cavity and a second cavity. The adjustment member 20 is provided in the first cavity, and a third through hole is provided through the partition, and the liquid pipeline 50 passes through the third through hole to connect with the adjustment member 20. The side wall of the third through hole can not only support the liquid pipeline 50, but also limit the movement of the liquid pipeline 50 in the first direction without offset, so as to prevent the liquid pipeline 50 from being separated from the connecting pipe 60 after offset. In this embodiment, the second through hole and the third through hole have the same diameter and both are clearance-matched with the liquid pipeline 50.

[0044] Furthermore, a 6% Luer cone connector structure 70 is provided at the free end of the liquid pipeline 50 to connect with a standard syringe, thereby improving the versatility and compatibility of the injection device. It should be noted that since the 6% Luer cone connector structure 70 is a very mature technology in the prior art, its structure and connection principle will not be introduced here.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An injection device, characterized in that: include: A shell (10), the shell (10) extending in a first direction and being hollow inside, a peripheral wall of the shell (10) being provided with an opening (11) along the first direction, an inner wall of the shell (10) being provided with a card slot (12) along the circumference of the shell (10), a plurality of the card slots (12) being provided along the first direction, and a first through hole being provided at a first end of the shell (10); An adjusting member (20), the adjusting member (20) comprising a clamping portion (21), the clamping portion (21) entering the housing (10) through the opening (11) and being clamped in one of the clamping slots (12), the clamping portion (21) being able to be clamped in different clamping slots (12), thereby driving the adjusting member (20) to change position along the first direction; a needle tube (30), the needle tube (30) being arranged at the first end of the housing (10) along the first direction and being in communication 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) changes its position to drive the extension tube (40) to adjust the length of the extension tube (40) extending out of the needle tube (30).

2. The injection device according to claim 1, characterized in that The injection device further comprises a liquid pipeline (50), the second end of the shell (10) is provided with a second through hole, the liquid pipeline (50) can enter the interior of the shell (10) through the second through hole and be connected to the adjusting member (20), and the extension tube (40) is in communication with 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 comprises a connecting tube (60), wherein the connecting tube (60) is arranged on the adjusting member (20), and two ends of the connecting tube (60) are respectively connected to the extension tube (40) and the liquid pipeline (50).

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; the ends of the extension tube (40) and the liquid pipeline (50) are both placed in the connecting tube (60) and closely 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 fit with the connecting hole.

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

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

9. The injection device according to any one of claims 1 to 8, characterized in that: The adjusting member (20) further comprises a push-pull portion (22), wherein the push-pull portion (22) extends from the opening (11) and is disposed outside the housing (10), and applying force to the push-pull portion (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 portion (22) is configured as an arc-shaped plate.

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