CN219804133U - Injection device for endoscope - Google Patents

Abstract

The utility model relates to an injection device for an endoscope, which comprises a needle head part, an inner tube, a shell and a liquid injection push rod, wherein the needle head part is arranged at one end of the inner tube; the limiting groove is located the lateral wall of shell, and the limiting groove includes displacement spout, locking groove, and the axial direction setting of displacement spout along the shell, locking groove are located the displacement node department of displacement spout to along the circumference and the displacement spout through connection of shell. The utility model has simple structure, convenient assembly, single-hand operation of advancing and retreating needle, adjustable and locking needle extension depth, simple structure, easy processing, strong practicability and the like.

Description

Injection device for endoscope

Technical Field

The present utility model relates to the technical field of medical instruments, and more particularly, to an injection device for injecting a drug into a tissue site in a body cavity by being introduced into the body cavity through a channel of an endoscope.

Background

An endoscope injection device is a medical device that introduces a treatment device into a body cavity through a channel of an endoscope and performs various treatments on an affected part or the like in the body cavity.

A conventional endoscope injection device is generally provided with an elongated insertion portion that can be inserted into an endoscope channel, and an operation portion that is connected to an end position of the insertion portion, wherein the insertion portion includes a double tube having an outer tube and an inner tube that is inserted into the outer tube so as to be retractable therein, the operation portion performs an operation of advancing and retracting the inner tube, and a hollow needle body is attached to a distal end of the inner tube. However, the conventional endoscope injection device generally has only a simple injection function, and all needle insertion and needle withdrawal operations need to be completed by hand during use, and the hand control of an operator is not separated from the whole course, so that the operation is laborious and inconvenient. In addition, the length of the needle tip extending out of the sleeve is constant and not adjustable, so that the needle is difficult to adapt to different disease parts, and the penetration depth of the needle tip cannot be adjusted according to the specific situation of the affected part.

Thus, there is a need for an endoscopic injection device that can be operated with one hand and in which the depth of retraction of the needle can be adjusted in a positioning manner.

Disclosure of Invention

The utility model aims to provide an endoscope injection device which solves the problems that in the prior art, a needle can not be advanced and retracted by one hand, the telescoping depth of a needle head can not be adjusted, and the like.

The embodiment of the utility model can be realized by the following technical scheme:

the injection device for the endoscope comprises a needle head part, an inner tube, a shell and a liquid injection push rod, wherein the needle head part is arranged at one end of the inner tube, the inner tube is arranged in the shell, the inner end of the liquid injection push rod stretches into the shell and is connected with the other end of the inner tube, a push-pull rod is arranged on the side surface of the liquid injection push rod, and the push-pull rod radially extends to a limit groove penetrating through the shell;

the limiting groove is located the lateral wall of shell, the limiting groove includes displacement spout, locking groove, the displacement spout is followed the axial direction setting of shell, the locking groove is located displacement node department of displacement spout, and follow the circumference of shell with displacement spout through connection.

Further, the shell comprises an outer tube and an operating part, the outer tube and the operating part are connected in a penetrating way along the axial direction, the inner tube is arranged in the outer tube, and the inner end of the liquid injection push rod extends into the operating part and is connected with the operating part in a sliding way.

Further, the operation part is a cylindrical structure with hollow inside and open ends, and the length direction of the displacement chute is along the axial direction of the operation part.

Further, the limit groove is arranged at the end part of the operation part, and one end of the displacement chute is communicated with the opening end of the shell.

Further, along the length direction of the displacement chute, the displacement chute is provided with at least two displacement nodes, the number of the locking grooves is at least two, and at least two locking grooves are respectively arranged at different displacement nodes of the displacement chute.

Further, at least two locking grooves are respectively positioned at two sides of the displacement chute and are alternately arranged.

Further, the needle head is movably connected with the inner tube along the circumferential direction of the needle head.

The injection device for the endoscope provided by the embodiment of the utility model has at least the following beneficial effects:

the utility model can advance and retreat the needle by one hand, the telescoping depth of the needle head can be adjusted along the length direction of the displacement chute, and the position locking is carried out through the locking groove, so that the utility model has the advantages of easy operation, adjustable telescoping depth of the needle head, strong practicability and the like.

The utility model has the advantages of simple structure, convenient assembly, simple structure, easy processing, production cost saving and the like, and the push-pull rod and the liquid injection push rod can be integrally formed.

Drawings

FIG. 1 is a schematic view showing the overall structure of an injection device for an endoscope according to the present utility model;

fig. 2 is a schematic view showing an exploded state of an injection device for an endoscope according to the present utility model.

Reference numerals in the figures

1-a needle part; 2-an inner tube; 3-a push-pull rod; 4-a housing; 41-an outer tube; 42-an operation part; 421-displacement chute; 422-locking groove; 5-liquid injection push rod.

Detailed Description

The present utility model will be further described below based on preferred embodiments with reference to the accompanying drawings.

In addition, various components on the drawings have been enlarged (thick) or reduced (thin) for ease of understanding, but this is not intended to limit the scope of the utility model.

The singular forms also include the plural and vice versa.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the embodiments of the present utility model conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, terms first, second, etc. are used herein for distinguishing between different elements, but not limited to the order of manufacture, and should not be construed as indicating or implying any relative importance, as such may be different in terms of its detailed description and claims.

The terminology used in the description presented herein is for the purpose of describing embodiments of the utility model and is not intended to be limiting of the utility model. It should also be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be connected mechanically, directly or indirectly through an intermediate medium, and can be communicated internally. The specific meaning of the above terms in the present utility model will be specifically understood by those skilled in the art.

Fig. 1 is a schematic view of the overall structure of an injection device for an endoscope of the present utility model, and fig. 2 is a schematic view of an exploded state of an injection device for an endoscope of the present utility model, as shown in fig. 1 and 2, the injection device for an endoscope comprises a needle portion 1, an inner tube 2, a push-pull rod 3, a housing 4, and a liquid injection push rod 5, wherein the needle portion 1 is disposed at one end of the inner tube 2, the inner tube 2 is disposed in the housing 4, the inner end of the liquid injection push rod 5 extends into the housing 4 and is connected with the other end of the inner tube 2, and the liquid injection push rod 5 drives the inner tube 2 to axially displace in the housing 4 under the action of force so as to change the telescopic state of the needle portion 1 relative to the housing 4.

The push-pull rod 3 is connected to the side surface of the liquid injection push rod 5 and extends to a limit groove penetrating through the shell 4 in the radial direction, the limit groove is positioned on the side wall of the shell 4 and comprises a displacement sliding groove 421 and a locking groove 422, the displacement sliding groove 421 is arranged along the axial direction of the shell 4, and the push-pull rod 3 is positioned in the displacement sliding groove 421 and slides and displaces along the axial direction so as to change the telescopic state of the needle part 1 relative to the shell 4;

the locking groove 422 is located at a displacement node of the displacement chute 421, and is in through connection with the displacement chute 421 along the circumferential direction of the housing 4, and after the push-pull rod 3 is displaced to the displacement node of the displacement chute 421, the push-pull rod 3 is pushed to displace into the locking groove 422 along the circumferential direction of the housing 4, so as to implement position locking.

Specifically, a containing cavity for containing the inner tube 2 and the liquid injection push rod 5 along the axial displacement is arranged in the shell 4, the inner end of the liquid injection push rod 5 is connected in the containing cavity of the shell 4 along the axial sliding, and the needle head part 1 is driven by the inner tube 2 to axially stretch and retract along the containing cavity.

It should be noted that, for convenience of description, in this embodiment, the end of the liquid injection push rod 5 connected to the inner tube 2 is set to be the inner end of the liquid injection push rod 5, and the end of the liquid injection push rod 5 disposed outside the housing 4 is set to be the outer end thereof.

In some preferred embodiments, the housing 4 includes an outer tube 41 and an operating portion 42, the outer tube 41 and the operating portion 42 are connected in a penetrating manner along an axial direction, the inner tube 2 is disposed in the outer tube 41, and an inner end of the liquid injection push rod 5 extends into the operating portion 42 and is connected with the operating portion 42 in a sliding manner, so as to adapt to the shapes of the inner tube 2 and the liquid injection push rod 5, and facilitate operation.

In some preferred embodiments, the operation portion 42 is a hollow cylinder structure with two open ends, and the length direction of the displacement chute 421 is set along the axial direction of the operation portion 42, so that the push-pull rod 3 pushes the injection push rod 5 to displace axially in the displacement chute 41.

In some preferred embodiments, the limiting groove is disposed at an end of the operating portion 42, and one end of the displacement chute 421 is connected with the open end of the housing 4, so as to facilitate assembly.

In some preferred embodiments, at least two displacement nodes are disposed along the length direction of the displacement chute 421, where the displacement nodes refer to a certain position point of the push-pull rod 3 along the axial direction of the housing 4 and are matched with the displacement chute 421, and when the push-pull rod 3 drives the injection push rod 5 to displace to different displacement nodes from outside to inside, the extension length of the needle portion 1 relative to the outer tube 41 is changed, so as to realize the adjustable depth of extension and retraction of the needle.

Accordingly, the number of the locking grooves 422 is at least two, and at least two locking grooves 422 are located at different displacement nodes of the displacement chute 421, so as to implement position locking on the push-pull rod 3 located at different displacement nodes.

In some preferred embodiments, at least two locking grooves 422 are respectively located at two sides of the displacement chute 421 and are alternately arranged, for example, a first locking groove 422 is disposed at the left side of the displacement chute 421, a second locking groove 422 is disposed at the right side of the displacement chute 421, and a third locking groove 422 is disposed at the left side of the displacement chute 421, which are alternately arranged in sequence, so as to optimize the layout and increase the convenience of operation.

In some preferred embodiments, the push-pull rod 3 needs to rotate along the circumferential direction of the housing 4 when performing position locking, so as to drive the needle head 1 to rotate, and in order to reduce discomfort to a patient caused by rotation of the needle head 1 during locking, the needle head 1 is movably connected with the inner tube 2 along the circumferential direction thereof.

In some preferred embodiments, the needle portion 1 is movably connected with the inner tube 2 through a connecting piece, the connecting piece is located between the inner side wall of the inner tube 2 and the periphery of the needle portion 1, the fixed end of the connecting piece is hinged to the side wall of the inner tube 2, the periphery of the connecting end of the needle portion 1 is provided with a moving track, and the movable end of the connecting piece is movably matched with the moving track for realizing movable connection.

While the foregoing is directed to embodiments of the present utility model, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (7)

1. The utility model provides an injection utensil for endoscope, includes tip portion (1), inner tube (2), shell (4), notes liquid push rod (5), tip portion (1) set up in one end of inner tube (2), inner tube (2) set up in shell (4), the inner of notes liquid push rod (5) stretches into in shell (4), and with the other end of inner tube (2) is connected, its characterized in that:

the side surface of the liquid injection push rod (5) is provided with a push-pull rod (3), and the push-pull rod (3) extends to a limit groove penetrating through the shell (4) along the radial direction;

the limiting groove is located the lateral wall of shell (4), the limiting groove includes displacement spout (421), locking groove (422), displacement spout (421) are followed the axial direction setting of shell (4), locking groove (422) are located displacement node department of displacement spout (421), and follow the circumference of shell (4) with displacement spout (421) through connection.

2. An endoscopic injection apparatus according to claim 1, wherein:

the shell (4) comprises an outer tube (41) and an operating part (42), the outer tube (41) and the operating part (42) are connected in a penetrating way along the axial direction, the inner tube (2) is arranged in the outer tube (41), and the inner end of the liquid injection push rod (5) extends into the operating part (42) and is connected with the operating part (42) in a sliding way.

3. An endoscopic injection apparatus according to claim 2, wherein:

the operation part (42) is a cylindrical structure with hollow inside and open ends, and the length direction of the displacement chute (421) is arranged along the axial direction of the operation part (42).

4. An endoscopic injection apparatus according to claim 3, wherein:

the limit groove is arranged at the end part of the operation part (42), and one end of the displacement chute (421) is communicated with the opening end of the shell (4).

5. An endoscopic injection apparatus according to claim 1, wherein:

along the length direction of displacement spout (421), displacement spout (421) are provided with two at least displacement nodes, the setting quantity of locking groove (422) is two at least, at least two locking groove (422) set up respectively in the different displacement nodes of displacement spout (421).

6. An endoscopic injection apparatus according to claim 5, wherein:

at least two locking grooves (422) are respectively positioned at two sides of the displacement sliding groove (421) and are alternately arranged.

7. An endoscopic injection apparatus according to claim 1, wherein:

the needle head (1) is movably connected with the inner tube (2) along the circumferential direction of the needle head.