CN214807863U - Injection device - Google Patents

Abstract

The utility model discloses an injection device, which comprises a device body, wherein the device body is provided with an inner cavity extending longitudinally, one end of the inner cavity is an injection end and is provided with an injection port, and the other end of the inner cavity is a tail end and is closed; a piston member having an outer peripheral surface sealed against an inner peripheral surface of the cavity and slidable between the injection end and the trailing end; wherein a portion of the cavity between the piston member and the trailing end is in communication with an external fluid source. The injection device can realize remote injection, has the advantages of relatively stable injection process, convenient injection, simple structure and lower cost.

Description

Injection device

Technical Field

The utility model relates to the field of medical equipment, in particular to injection device.

Background

When experimental treatment or injection treatment is carried out on some experimental animals, even patients, operation is often required to be carried out in a room with radiation, an operator must wear a radiation-proof clothes to carry out injection operation in the room, if the radiation-proof clothes do not exist, the operator must carry out injection operation outside the room, but a proper injector cannot be found at present, so that a device capable of carrying out injection operation outside a radiation area is required, and the using requirement is met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection device, this injection device can realize remote injection, and the injection process is stable convenient, simple structure, and the cost is lower.

In order to solve the above technical problem, an embodiment of the present invention provides an injection device, including:

the device comprises a device body, a valve body and a valve body, wherein the device body is provided with a longitudinally extending inner cavity, one end of the inner cavity is an injection end and is provided with an injection port, and the other end of the inner cavity is a tail end and is closed; a piston member having an outer peripheral surface sealed against an inner peripheral surface of the lumen and slidable between the injection end and the trailing end; wherein a portion of the lumen between the piston member and the trailing end is in communication with an external fluid source.

Compared with the prior art, the utility model, this device accessible remote injection outside fluid promotes the activity of piston spare and accomplishes the injection, and the injection process is comparatively stable, simple structure, and the cost is lower.

In some embodiments, a portion of the cavity between the piston member and the trailing end is in communication with an external fluid source via a communication tube.

In some embodiments, the communicating tube extends through a trailing end of the lumen.

In some embodiments, the injection device further comprises an end cap, the trailing end being closed by the end cap; wherein, the communicating pipe penetrates through the end cover and is inserted into the inner cavity.

In some embodiments, one end of the communication pipe located in the inner cavity is connected to the piston member, and an opening is provided on a side wall of the communication pipe, and the opening is located between the piston member and the end cover.

In some embodiments, a protruding member is annularly arranged on a pipe wall of the communicating pipe, and the protruding member is located between the opening and the end cover.

In some embodiments, the outer periphery of one end of the communicating pipe outside the inner cavity is provided with a radially extending injection handle.

In some embodiments, a sealing ring is disposed between the communication tube and the end cap.

In some embodiments, one end of the communicating pipe located outside the inner cavity is communicated with the fluid source through an extension pipe, and the communicating pipe is detachably connected with the extension pipe.

In some embodiments, the extension tube is a hose.

In some embodiments, the piston member includes a plurality of sealing plugs arranged between the injection end and the tail end, and a connecting rod connecting two adjacent sealing plugs, and each sealing plug circumferentially abuts against the inner wall of the device body.

In some embodiments, the injection device further comprises an injection head in communication with the injection port.

In some embodiments, the external fluid source is a gas source.

Drawings

Fig. 1 is a schematic structural view of an injection device according to a first embodiment of the present invention;

figure 2 is a schematic structural view of an injection device comprising an extension tube according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of an injection device according to a second embodiment of the present invention.

Detailed Description

Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

A first embodiment of the invention will be described with reference to the accompanying drawings, in which the device comprises a device body 1 and a piston member 2, as shown in figure 1. The device body 1 is provided with a longitudinally extending inner cavity 3, one end of the inner cavity 3 is an injection end 4, the injection end 4 is provided with an injection port 5, the other end of the inner cavity 3 is a tail end 6, and the tail end 6 is in a closed state. The outer circumferential surface of the piston member 2 is sealed against part of the inner circumferential surface of the bore 3 and is slidable between the injection end 4 and the trailing end 6. The portion of the cavity 3 between the piston member 2 and the trailing end 6 is in communication with an external fluid source (not shown).

In particular, the longitudinally extending cavity 3 may be cylindrical or have a partially cylindrical shape, the outer circumferential surface of the piston member 2 abutting against the inner circumferential surface of the cylindrical portion and being slidable within the cylindrical cavity 2. It is understood, however, that the cavity 3 may have other shapes, such as a triangular prism, a cubic prism, etc., and is not limited thereto. The injection port 5 of the injection end 4 is communicated with an injection head (not shown in the figure) which is used for being inserted into the body of the experimental animal for injection. The tail end 6 of the inner cavity 3 is in a closed state, and can be closed by a cover body or be integrally closed with the device body. The inner cavity 3 is provided with a through hole 7 on the inner cavity wall between the piston 2 and the tail end 6, and the inner cavity 3 between the piston 2 and the tail end 6 is communicated with an external fluid source through the through hole 7. The through hole 7 may be provided on a closure cap of the trailing end 6 opposite the injection port 5. It will be appreciated that the through-hole 7 may be provided at other locations in the lumen wall between the piston member 2 and the trailing end 6. The inner cavity 3 can be connected with an external fluid source through the through hole 7 by the communicating pipe 8, and the communicating pipe 8 can enter the inner cavity 3 or can not enter the inner cavity 3. The external fluid source injects fluid into the inner cavity 3 between the piston member 2 and the tail end 6 through the communicating tube 8, pushes the piston member 2 to move forward, and injects the injection liquid between the piston member 2 and the injection end 4 into the experimental animal body through the injection head, wherein the injection head is pre-inserted into the animal body before injection. The device injects by injecting fluid to push the piston piece to move, and can alleviate vibration and impact which may occur in the injection process. In addition, in order to ensure that the injection device is kept stable in the injection process, the injection device can be arranged on the fixed support so as to ensure that the injection device does not topple and move and the like in the injection process. Additionally, the external fluid source may be a liquid source or a gas source. The external fluid source may feed liquid or gas into the cavity 3 between the piston member 2 and the trailing end 6, either manually or by some automatic pressurizing means. In addition, the communicating pipe 8 can have different length specifications and can also be adjustable in length, and the length can be adjusted to be outside the radiation area during injection, so that the communicating pipe is not irradiated by radiation.

In some embodiments, as shown in fig. 2, when the length of the communicating tube 8 is short, the communicating tube 8 may be connected to an external fluid source through an extension tube 9. Extension pipe 9 can be with 8 the same stereoplasm materials of communicating pipe, also can be the hose, and when extension pipe 9 is longer, the hose is more convenient to be accomodate, occupies less space. Can be connected through forms such as screw thread, buckle between communicating pipe 8 and the extension pipe 9, also can be directly with communicating pipe 8 disect insertion to extension pipe 9 in the fastening connection, wherein the opening diameter of extension pipe 9 is greater than the opening diameter of communicating pipe 8, and the opening part of extension pipe 9 reduces along the extending direction gradually to make things convenient for communicating pipe 8 to insert extension pipe 9 and chucking communicating pipe 8. In addition, the extension pipe 9 can be pipes with different length specifications, and users can select extension pipes with different lengths according to needs so as to adapt to different requirements.

Compared with the prior art, the utility model, this device promotes the activity of piston spare through remote injection outside fluid and accomplishes the injection, has alleviated vibration and impact that probably appears in the injection process, and the injection process is more stable, simple structure, and the cost is lower.

A second embodiment of the present invention will be described below with reference to the drawings, and as shown in fig. 3, the present device includes a device body 1, a piston member 2, an end cap 60, and a communicating tube 8. The device body 1 is provided with a longitudinally extending inner cavity 3, one end of the inner cavity 3 is an injection end 4, and the injection end 4 is provided with an injection port 5. The other end of the inner cavity 3 is a tail end 6, and an end cover 60 is arranged at the tail end 6. The end cover 60 is provided with a through hole 7, a communicating pipe 8 is arranged in the through hole 7, the communicating pipe 8 penetrates through the end cover 60 to communicate the inner cavity 3 with an external fluid source, the communicating pipe 8 is fixedly connected with the piston part 2, the side wall of the communicating pipe 8 is further provided with an opening 80, and the opening 80 is positioned between the piston part 2 and the end cover 60. The outer circumferential surface of the piston member 2 is sealed against part of the inner circumferential surface of the bore 3 and is slidable between the injection end 4 and the trailing end 6.

Specifically, the longitudinally extending cavity 3 may be cylindrical or have a partially cylindrical shape, and the outer peripheral surface of the piston member 2 is held down to the inner peripheral surface of the cylindrical portion and is slidable in the cylindrical shape. It is understood, however, that the cavity 3 may have other shapes, such as a triangular prism, a cubic prism, etc., and is not limited thereto. The injection port 3 of the injection end 4 is communicated with an injection head which is used for being inserted into the body of an experimental animal for injection. The end cap 60 is fixedly connected to the tail end 6 for closing the tail end 6, and may be detachably connected or integrally connected. When the tail end 6 and the end cover 60 are detachably connected, a sealing ring can be arranged between the tail end 6 and the end cover 60 to ensure the sealing effect between the end cover 60 and the tail end 6. A sealing ring can be arranged between the through hole 7 on the end cover 60 and the communicating pipe 8 to ensure the sealing effect of the fluid in the inner cavity 3 and the external space. One end of the communicating pipe 8 located in the inner cavity 3 is fixedly connected with the piston part 2, an opening 80 is formed in the side wall of the communicating pipe 8, the opening 80 can be one or multiple, preferably, a plurality of openings are circumferentially and annularly formed in the pipe wall of the communicating pipe 8, and therefore even impact force can be provided on the piston part through the arrangement, and the injection process is more stable. External fluid enters the communication tube 8 and then passes through the opening 80 into the cavity 3 between the piston member 2 and the end cap 60. In addition, the distance between the opening 80 and the piston member 2 is 1mm to 3mm, and preferably, the distance between the opening 80 and the piston member 2 is 2mm, so that the piston member 2 can be pushed to move with an optimal impact force when the external fluid is filled, and the pushing efficiency is highest.

In addition, in order to ensure that the opening 80 is always located in the inner cavity 3 between the piston member 2 and the end cover 60 during the movement of the piston member 2, a protruding member (not shown in the figure) may be further annularly arranged on the pipe wall of the communicating pipe 8, the protruding member is located between the opening 80 and the end cover 60, when the piston member 2 moves, the communicating pipe 8 also slides along with the piston member 2, and the protruding member may ensure that the opening 80 does not slide out of the inner cavity 3 along with the piston member 2. Preferably, the distance between the protrusion and the opening 80 is 1mm-2mm, preferably 1.5mm, so that the opening 80 has a large movement space in the inner cavity 3.

The periphery of the end of the communicating tube 8 outside the cavity 3 is provided with an injection handle 81 extending radially, so that after the injection is completed, the piston member 2 can be conveniently pulled back to the vicinity of the tail end 6 and a certain amount of injection liquid can be sucked into the cavity 3 between the injection end 4 and the piston member 2 by using the vacuum formed between the injection end 4 and the piston member 2. An external fluid source is connected with the inner cavity 3 through a communicating pipe 8, fluid is injected into the inner cavity 3, the piston piece 2 is pushed to move forwards along with the increase of the volume of the fluid in the inner cavity 3, and therefore the injection liquid between the injection end 4 and the piston piece 2 is pushed out and is input into the experimental animal body through an injection head.

In some embodiments, the communicating tube 8 may also be connected to an external fluid source through an extension tube 9. Extension pipe 9 can be with 8 the same stereoplasm materials of communicating pipe, also can be the hose, and when extension pipe 9 is longer, the hose is more convenient to be accomodate, occupies less space. Can be through threaded connection between communicating pipe 8 and the extension pipe 9, also can be directly with the fastening connection of communicating pipe 8 disect insertion to extension pipe 9, wherein the opening diameter of extension pipe 9 must be greater than the opening diameter of communicating pipe 8, and the opening part of extension pipe 9 reduces along the extending direction gradually, makes things convenient for communicating pipe 8 to insert extension pipe 9 and chucking communicating pipe 8. In some embodiments, as shown in fig. 2, the piston member 2 includes a plurality of sealing plugs, and a connecting rod connecting two adjacent sealing plugs, each sealing plug is arranged between the injection end 4 and the tail end 6 and circumferentially abuts against the inner wall of the device body 1, so that the sealing effect of the spaces on both sides of the piston member 2 can be enhanced.

The injection device is also applicable to fields other than animal experiments, and can be used for injection treatment of patients in a radiation area.

The device can inject external fluid in a long distance to push the piston piece to move to complete injection, so that vibration and impact which possibly occur in the injection process are alleviated, the injection process is more stable, the structure is simple, and the cost is lower.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims (12)

1. An injection device, comprising:

the device comprises a device body, a valve body and a valve body, wherein the device body is provided with a longitudinally extending inner cavity, one end of the inner cavity is an injection end and is provided with an injection port, and the other end of the inner cavity is a tail end and is closed;

a piston member having an outer peripheral surface sealed against an inner peripheral surface of the lumen and slidable between the injection end and the trailing end;

wherein a portion of the lumen between the piston member and the trailing end is in communication with an external fluid source.

2. The injection unit of claim 1, wherein a portion of the internal chamber between the piston member and the trailing end is in communication with an external fluid source via a communication tube.

3. The injection unit of claim 2, wherein the communication tube extends through a trailing end of the interior chamber.

4. The injection device of claim 3, further comprising an end cap, the trailing end being closed by the end cap; wherein, the communicating pipe penetrates through the end cover and is inserted into the inner cavity.

5. The injection unit of claim 4, wherein the end of the communication tube located in the inner cavity is connected to the piston member, and an opening is provided on a side wall of the communication tube, the opening being located between the piston member and the end cap.

6. The injection unit of claim 5, wherein a projection is disposed around a wall of the communication tube, the projection being positioned between the opening and the end cap.

7. The injection device as defined in claim 5, wherein an outer circumference of an end of the communication tube located outside the inner chamber is provided with a radially extending injection handle.

8. The injection unit of claim 4, wherein a sealing ring is disposed between the communication tube and the end cap.

9. The injection device according to claim 2, wherein an end of the communication tube located outside the inner chamber is in communication with the fluid source through an extension tube, and the communication tube is detachably connected to the extension tube.

10. The injection device of claim 9, wherein the extension tube is a flexible tube.

11. The injection device of claim 1, wherein the piston member comprises a plurality of sealing plugs arranged between the injection end and the tail end, and a connecting rod connecting two adjacent sealing plugs, and each sealing plug circumferentially abuts against the inner wall of the device body.

12. The injection device of claim 1, further comprising an injection head in communication with the injection port.

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