Injection device

Abstract

The present invention discloses an injection device, which comprises a device body, the device body has 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, the outer circumference of the piston member is sealed relative to the inner circumference of the inner cavity and can slide between the injection end and the tail end; wherein the part of the inner cavity between the piston member and the tail end is connected to an external fluid source. The injection device can realize remote injection, the injection process is relatively stable, the injection is convenient, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to an injection device. Background Art

[0002] When conducting experiments or injection treatments on some experimental animals or even patients, it is often necessary to operate in a room with radiation. The operator must wear radiation protection clothing to perform the injection operation in the room. If there is no radiation protection clothing, the injection operation must be performed outside the room. However, suitable syringes cannot be found at present. Therefore, a device that can perform injection operations outside the radiation area is needed to meet the needs of use. Summary of the invention

[0003] The object of the present invention is to provide an injection device, which can realize long-distance injection, has a stable and convenient injection process, a simple structure and low cost.

[0004] To solve the above technical problems, an embodiment of the present invention provides an injection device, comprising: a device body, the device body having a longitudinally extending inner cavity, one end of the inner cavity being an injection end and provided with an injection port, and the other end of the inner cavity being a tail end and being closed; a piston member, the outer circumferential surface of the piston member being sealed relative to the inner circumferential surface of the inner cavity and being slidable between the injection end and the tail end; wherein the portion of the inner cavity located between the piston member and the tail end is connected to an external fluid source.

[0005] Compared with the prior art, the device of the present invention can complete the injection by injecting external fluid from a long distance to push the piston to move, the injection process is relatively stable, the structure is simple, and the cost is low.

[0006] In some embodiments, a portion of the inner cavity between the piston member and the tail end is connected to an external fluid source through a connecting tube.

[0007] In some embodiments, the connecting tube passes through the rear end of the inner cavity.

[0008] In some embodiments, the injection device further comprises an end cover, and the tail end is closed by the end cover; wherein the connecting tube passes through the end cover and is inserted into the inner cavity.

[0009] In some embodiments, one end of the connecting tube located in the inner cavity is connected to the piston member, and an opening is provided on the side wall of the connecting tube, and the opening is located between the piston member and the end cover.

[0010] In some embodiments, a protrusion is provided on the wall of the connecting tube, and the protrusion is located between the opening and the end cover.

[0011] In some embodiments, a radially extending injection handle is provided on the outer periphery of one end of the connecting tube located outside the inner cavity.

[0012] In some embodiments, a sealing ring is provided between the connecting pipe and the end cover.

[0013] In some embodiments, one end of the connecting tube located outside the inner cavity is connected to the fluid source through an extension tube, and the connecting tube and the extension tube are detachably connected.

[0014] In some embodiments, the extension tube is a hose.

[0015] 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 is circumferentially abutted against the inner wall of the device body.

[0016] In some embodiments, the injection device further comprises an injection head, wherein the injection head is connected to the injection port.

[0017] In some embodiments, the external fluid source is a gas source. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an injection device according to a first embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of an injection device including an extension tube according to a first embodiment of the present invention;

[0020] Figure 3 2 is a schematic structural diagram of an injection device according to a second embodiment of the present invention. Specific embodiments

[0021] The following will be described in detail with reference to the accompanying drawings to provide a clearer understanding of the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0022] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0023] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0024] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0025] 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.

[0026] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0027] The following describes a first embodiment of the present invention with reference to the accompanying drawings. Figure 1 As shown, the device comprises a device body 1 and a piston member 2. The device body 1 has 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, and the other end of the inner cavity 3 is a tail end 6, which is in a closed state. The outer circumference of the piston member 2 is sealed relative to a part of the inner circumference of the inner cavity 3, and can slide between the injection end 4 and the tail end 6. The part of the inner cavity 3 between the piston member 2 and the tail end 6 is connected to an external fluid source (not shown in the figure).

[0028] Specifically, the inner cavity 3 extending longitudinally can be cylindrical, or part of it is cylindrical, the outer circumference of the piston member 2 is against the inner circumference of the cylindrical part, and can slide in the cylindrical cavity 2. However, it is understandable that the inner cavity 3 can also be other shapes, such as triangular, cubic, etc., which are not specifically limited here. The injection port 5 of the injection end 4 is connected to the injection head (not shown in the figure), and the injection head is used to insert into the body of the experimental animal for injection. The tail end 6 of the inner cavity 3 is in a closed state, which can be closed by a cover body or can be closed integrally with the device body. A through hole 7 is provided on the inner cavity wall of the part of the inner cavity 3 located between the piston member 2 and the tail end 6, and the part of the inner cavity 3 located between the piston member 2 and the tail end 6 is connected to the external fluid source through the through hole 7. The through hole 7 can be set on the closing cover of the tail end 6 opposite to the injection port 5. However, it is understandable that the through hole 7 can also be set at other positions of the inner cavity wall between the piston member 2 and the tail end 6. The inner cavity 3 can be connected to the external fluid source via the connecting tube 8 passing through the through hole 7, and the connecting tube 8 can enter the inner cavity 3 or not. The external fluid source injects the fluid into the inner cavity 3 between the piston member 2 and the tail end 6 via the connecting 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 through the injection head, wherein the injection head has been pre-inserted into the animal body before injection. The device injects by injecting fluid to push the piston member to move, which can alleviate the vibration and impact that may occur during the injection process. In addition, in order to ensure that the injection device remains stable during the injection process, the injection device can also be installed on a fixed bracket to ensure that the injection device does not fall over and move during the injection process. In addition, the external fluid source can be a liquid source or a gas source. The external fluid source can manually or through some automatic pressurizing device to input liquid or gas into the inner cavity 3 between the piston member 2 and the tail end 6. In addition, the connecting tube 8 can have different length specifications, and the length can also be adjustable. During injection, the length can be adjusted to outside the radiation area so as not to be irradiated by radiation.

[0029] In some embodiments, Figure 2 As shown, when the length of the connecting tube 8 is shorter, the connecting tube 8 can also be connected to the external fluid source through the extension tube 9. The extension tube 9 can be made of the same hard material as the connecting tube 8, or it can be a hose. When the extension tube 9 is longer, the hose is more convenient to store and takes up less space. The connecting tube 8 and the extension tube 9 can be connected by threads, buckles, etc., or the connecting tube 8 can be directly inserted into the extension tube 9 for fastening, wherein the opening diameter of the extension tube 9 is larger than the opening diameter of the connecting tube 8, and the opening portion of the extension tube 9 gradually decreases along the extension direction to facilitate the insertion of the connecting tube 8 into the extension tube 9 and clamp the connecting tube 8. In addition, the extension tube 9 can be a tube of different lengths, and the user can choose extension tubes of different lengths as needed to meet different needs.

[0030] In some embodiments, the opening diameter of the connecting tube 8 is the same as the opening diameter of the injection port. When the piston member 2 is pushed to one side of the inner cavity 3, the original injection end 4 of the device body 1 can be used as a new tail end, and the original tail end 6 can be used as a new injection end. At this time, the external fluid source can be connected to the new tail end side to push the piston member 2 to slide in the direction of the new injection end. In this way, the injection end and the tail end repeatedly exchange roles to inject experimental animals. The injection device can be reused, which is convenient for operation and reduces costs.

[0031] Compared with the prior art, the device of the present invention completes the injection by remotely injecting external fluid to push the piston to move, thereby alleviating the vibration and impact that may occur during the injection process, making the injection process more stable, the structure simpler, and the cost lower.

[0032] The second embodiment of the present invention is described below with reference to the accompanying drawings. Figure 3 As shown, the device comprises a device body 1, a piston member 2, an end cover 60 and a connecting pipe 8. The device body 1 has an inner cavity 3 extending longitudinally, 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 provided at the tail end 6. A through hole 7 is provided on the end cover 60, and a connecting pipe 8 is provided in the through hole 7. The connecting pipe 8 passes through the end cover 60 to connect the inner cavity 3 with an external fluid source, and the connecting pipe 8 is fixedly connected to the piston member 2. An opening 80 is also provided on the side wall of the connecting pipe 8, and the opening 80 is located between the piston member 2 and the end cover 60. The outer circumference of the piston member 2 is sealed relative to a part of the inner circumference of the inner cavity 3, and can slide between the injection end 4 and the tail end 6.

[0033] Specifically, the inner cavity 3 extending longitudinally can be cylindrical, or there is a part of it that is cylindrical, and the outer circumferential surface of the piston member 2 is in contact with the inner circumferential surface of the cylindrical part, and can slide in the cylinder. However, it is understandable that the inner cavity 3 can also be other shapes, such as triangular, cubic, etc., which are not specifically limited here. The injection port 3 of the injection end 4 is connected to the injection head, and the injection head is used to be inserted into the body of the experimental animal for injection. The end cap 60 is fixedly connected to the tail end 6 to close the tail end 6, and can be a detachable connection or an integral connection. When it is a detachable connection, a sealing ring can also be provided between the tail end 6 and the end cap 60 to ensure the sealing effect between the end cap 60 and the tail end 6. A sealing ring can also be provided between the through hole 7 on the end cap 60 and the connecting pipe 8 to ensure the sealing effect between the fluid in the inner cavity 3 and the external space. One end of the connecting tube 8 located in the inner cavity 3 is fixedly connected to the piston member 2, and an opening 80 is provided on the side wall of the connecting tube 8. The opening 80 may be one or more. Preferably, a plurality of openings are provided circumferentially on the tube wall of the connecting tube 8. Such a configuration can provide a uniform impact force on the piston member, making the injection process more stable. After the external fluid enters the connecting tube 8, it passes through the opening 80 and enters the inner cavity 3 between the piston member 2 and the end cover 60. In addition, the distance between the opening 80 and the piston member 2 is 1mm-3mm. Preferably, the distance between the opening 80 and the piston member 2 is 2mm. When the external fluid is filled, the piston member 2 can be pushed to move with the best impact force, and the pushing efficiency is the highest.

[0034] In addition, in order to ensure that the opening 80 is always 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 piece (not shown in the figure) can be arranged on the wall of the connecting tube 8. The protruding piece is located between the opening 80 and the end cover 60. When the piston member 2 moves, the connecting tube 8 also slides with the piston member 2. The protruding piece can ensure that the opening 80 does not slide out of the inner cavity 3 with the sliding of the piston member 2. Preferably, the distance between the protruding piece and the opening 80 is 1mm-2mm, and preferably, the distance between the protruding piece and the opening 80 is 1.5mm. Such an arrangement can allow the opening 80 to obtain a larger activity space in the inner cavity 3.

[0035] The outer periphery of one end of the connecting tube 8 outside the inner cavity 3 is provided with a radially extending injection handle 81. When 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 utilizing the vacuum formed between the injection end 4 and the piston member 2. The external fluid source is connected to the inner cavity 3 through the connecting tube 8, and the fluid is injected into the inner cavity 3. As the volume of the fluid in the inner cavity 3 increases, the piston member 2 is pushed forward, thereby pushing the injection liquid between the injection end 4 and the piston member 2 out and inputting it into the body of the experimental animal through the injection head.

[0036] In some embodiments, the connecting tube 8 can also be connected to an external fluid source through an extension tube 9. The extension tube 9 can be made of the same hard material as the connecting tube 8, or it can be a hose. When the extension tube 9 is longer, the hose is more convenient to store and takes up less space. The connecting tube 8 and the extension tube 9 can be connected by threads, or the connecting tube 8 can be directly inserted into the extension tube 9 for fastening. The opening diameter of the extension tube 9 must be larger than the opening diameter of the connecting tube 8, and the opening portion of the extension tube 9 gradually decreases along the extension direction, so that the connecting tube 8 can be inserted into the extension tube 9 and the connecting tube 8 can be clamped. In some embodiments, Figure 2 As shown, 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 is circumferentially abutted against the inner wall of the device body 1, thereby enhancing the sealing effect of the space on both sides of the piston member 2.

[0037] It should be noted that the injection device is also applicable to fields other than animal experiments. For example, the device can also be used when performing injection treatment on patients in a radiation zone.

[0038] The device can complete the injection by injecting external fluid from a long distance to push the piston to move, thereby alleviating the vibration and impact that may occur during the injection process, making the injection process more stable, the structure simple, and the cost low.

[0039] Preferred embodiments of the present invention have been described above in detail, but 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 further embodiments.

[0040] 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 considered 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 these claims are entitled.

Claims

1. An injection device, characterized in that: include: The device body has 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, the outer circumference of which is sealed relative to the inner circumference of the inner cavity and can slide between the injection end and the tail end; wherein a portion of the inner cavity between the piston member and the tail end is in communication with an external fluid source; The portion of the inner cavity between the piston member and the tail end is connected to an external fluid source through a connecting pipe; an opening is provided on a side wall of the connecting pipe; One end of the connecting tube located outside the inner cavity is connected to the fluid source through an extension tube; The connecting tube passes through the rear end of the inner cavity; The injection device further comprises an end cover, and the tail end is closed by the end cover; wherein the connecting tube penetrates the end cover and is inserted into the inner cavity; One end of the connecting pipe located in the inner cavity is connected to the piston member, and the opening is located between the piston member and the end cover.

2. The injection device according to claim 1, characterized in that A protruding piece is arranged on the pipe wall of the connecting pipe, and the protruding piece is located between the opening and the end cover.

3. The injection device according to claim 1, characterized in that A radially extending injection handle is provided on the outer periphery of one end of the communicating tube located outside the inner cavity.

4. The injection device according to claim 1, characterized in that A sealing ring is provided between the connecting pipe and the end cover.

5. The injection device according to claim 1, characterized in that The connecting pipe is detachably connected to the extension pipe.

6. The injection device according to claim 5, characterized in that The extension tube is a hose.

7. The injection device according to claim 1, characterized in that 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 is circumferentially abutted against the inner wall of the device body.

8. The injection device according to claim 1, characterized in that The injection device further comprises an injection head, wherein the injection head is communicated with the injection port.

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