Needle falling prevention type injector for micro pump

Abstract

The utility model discloses an anti-drop needle type syringe for a micro pump, which belongs to the technical field of syringes and comprises a syringe body and an anti-drop piece arranged at the end of the syringe body and connected with a needle cylinder, and the anti-drop piece is used for stably connecting the syringe body with an extension tube. The connecting part is in threaded connection with a needle cylinder of the injector body, the sealing part is integrally connected with the connecting part, the diameter of the sealing part is larger than that of the connecting part, the circumferential inner wall of the sealing part is in threaded fit with the end of the extension tube, an elastic sealing ring is arranged on the inner wall of the anti-falling part, and the outer wall of the anti-falling part is in threaded fit with the end of the extension tube. Due to the fact that the anti-disengaging piece is in threaded connection with the extension tube, the connection stability is better, the possibility of disengaging is reduced, and the connection sealing performance between the extension tube and the anti-disengaging piece is better due to the fact that the anti-disengaging piece abuts against the elastic sealing ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to syringe technical field especially relates to a kind of syringe for preventing needle type syringe of micro pump. BACKGROUND

[0002] Micro pump is usually placed in specific location, such as the equipment rack of sickbed side, there is certain distance between syringe and patient's body, in order to facilitate medical staff to carry out injection operation to patient, usually set up extension tube at the end of syringe.

[0003] The current syringe used on micro pump and the connection mode of extension tube have direct insertion type and through luer joint to carry out conventional connection, but patient is easy to fall off if appearing restlessness etc., and when injecting some special medicine, such as nimodipine injection, etc., need to be infused with specific pressure, to ensure that medicine can accurately reach the action site and play the best curative effect, which needs to pressurize extension tube, in this case, it is also possible to cause the needle between extension tube and the syringe on micro pump to fall off, and although some extension tubes on the market can be screwed or clamped with the syringe barrel, but there may be poor sealing at the connection, causing the drug to leak when bolus injection, and when the needle needs to be installed on the syringe to draw medicine, since the syringe barrel is provided with threads matched with the extension tube, it is not convenient to install the needle.

[0004] Therefore, it is urgent to improve the syringe for preventing needle type of micro pump to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model embodiment provides a kind of syringe for preventing needle type of micro pump to solve the technical problem mentioned above.

[0006] The utility model embodiment adopts the following technical scheme: including syringe body and the needle barrel of the end part of syringe body are connected with the anti-drop piece, the anti-drop piece is used to stably connect syringe body and extension tube, the anti-drop piece includes the connecting portion of the thread connection with the needle barrel of syringe body and the sealing portion integrally connected with the connecting portion, and the diameter of the sealing portion is greater than the diameter of the connecting portion, the circumferential inner wall of the sealing portion is threadedly matched with the end part of extension tube, the elastic sealing ring is arranged on the inner wall of the anti-drop piece, and the circumferential inner wall of the elastic sealing ring is in abutment with the outer wall of the needle barrel of syringe body, when the anti-drop piece is threadedly screwed to the limit position of the thread connection of the upper part of the needle barrel of the end part of syringe body, the upper end surface of the elastic sealing ring is flush with the upper end surface of the needle barrel of the end part of syringe body, the thread connection of the anti-drop piece and extension tube is better, the possibility of falling off is reduced, and the connection sealing between extension tube and anti-drop piece is better by the abutment of elastic sealing ring.

[0007] Further, an inner wall of the anti-drop piece is provided with a supporting ring, which is located at a lower end of the elastic sealing ring and used for supporting the elastic sealing ring, so that the elastic sealing ring can be in close contact with the end of the extension pipe.

[0008] Further, an upper end surface of the supporting ring is provided with a first sealing protrusion, and a lower end of the elastic sealing ring is provided with a first sealing groove corresponding to the first sealing protrusion, so as to improve the sealing effect between the supporting ring and the elastic sealing ring.

[0009] Further, when the sealing part is threadedly connected with the extension pipe, the upper end surface of the elastic sealing ring is in contact with the end of the extension pipe, so as to reduce the gas entering from the gap between the extension pipe and the sealing part.

[0010] Further, the upper end of the elastic sealing ring is provided with a second sealing groove, and a lower end surface of the end of the extension pipe is provided with a second sealing protrusion corresponding to the second sealing groove, so as to further improve the sealing effect between the extension pipe and the anti-drop piece.

[0011] Further, an outer circumferential wall of the anti-drop piece is provided with an anti-skid protrusion, so as to facilitate the screwing of the anti-drop piece.

[0012] The above at least one technical scheme adopted by the embodiment of the utility model can achieve the following beneficial effects:

[0013] In the utility model, the elastic sealing ring is driven by the anti-drop piece to be in the same level with the end of the needle cylinder, the residual liquid medicine in the needle cylinder part is reduced, the extension pipe can be threadedly connected with the needle cylinder, the connection stability is better, the possibility of falling off is reduced, the connection sealing between the extension pipe and the anti-drop piece is better through the contact of the elastic sealing ring, the risk of liquid medicine leakage or air entering is reduced, and the injection effect of the micro pump is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the utility model, and constitute a part of the utility model. The illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0015] Figure 1 It is a cross-sectional structure schematic view of the anti-drop piece in the utility model;

[0016] Figure 2 It is a connection structure schematic view of the extension pipe and the anti-drop piece in the utility model;

[0017] Figure 3 It is a separation structure schematic view of the extension pipe and the anti-drop piece in the utility model;

[0018] Figure 4The partial section structure schematic diagram of the needle head mounted on the needle cylinder in the utility model is shown in the figure.

[0019] Figure 5 The connection three-dimensional structure schematic diagram of the extension pipe and the syringe body in the utility model is shown in the figure.

[0020] Figure 6 The connection three-dimensional structure schematic diagram of the needle head and the syringe body in the utility model is shown in the figure.

[0021] Figure 7 The structure schematic diagram of the anti-falling piece mounted on the syringe body in the utility model is shown in the figure.

[0022] Reference signs

[0023] Syringe body 1, anti-falling piece 2, connecting part 21, sealing part 22, extension pipe 3, elastic sealing ring 4, supporting ring 5, first sealing protrusion 6, first sealing groove 6l, second sealing groove 7, second sealing protrusion 7l, anti-skid protrusion 8. Specific implementation

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the specific embodiment and corresponding drawings of the utility model to clearly and completely describe the technical scheme of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all the other embodiments obtained by the ordinary skilled in the art without making the creative labor belong to the protection scope of the utility model.

[0025] The following will combine the drawings to specifically describe the technical scheme provided by each embodiment of the utility model.

[0026] The utility model discloses an anti -needle formula syringe for micro pump, including syringe body 1 and the anti -drop piece 2 of being located syringe body 1 end needle cylinder connection, the anti -drop piece 2 is used for the firm connection of syringe body 1 with extension pipe 3, prevent the syringe body 1 of falling off on the extension pipe 3 of micro pump in the use process, wherein the anti -drop piece 2 includes the connecting portion 21 of the needle cylinder place screw connection with syringe body 1 and the sealing portion 22 of integral forming connection with connecting portion 21, the circumferential inner wall of sealing portion 22 is cooperated with the end screw of extension pipe 3, can first thread connection of extension pipe 3 with sealing portion 22 when using, to make the connection stability of two better, and still be equipped with elastic sealing ring 4 on the inner wall of anti -drop piece 2, elastic sealing ring 4 can adopt medical silica gel and so on elastic material quality making, and the circumferential inner wall of elastic sealing ring 4 is in contact with the needle cylinder outer wall of syringe body 1, when the anti -drop piece 2 screw is combined to the needle cylinder outer wall of syringe body 1 end, the upper end surface of elastic sealing ring 4 is flush with the upper end surface of needle cylinder, if the needle of needle cylinder on syringe body 1 end is pulled out at this time, the part of drug solution that syringe body 1 exudes also will not enter the position between the connecting portion 21 of sealing portion 22 and needle cylinder with the blocking effect of elastic sealing ring 4, thereby reduce the pollution of drug solution residue, and when sealing portion 22 is thread connected with extension pipe 3, the upper end surface of elastic sealing ring 4 is in contact with the end of extension pipe 3, to make the connection sealing property between anti -drop piece 2 and extension pipe 3 better, and the diameter of sealing portion 22 is greater than the diameter of connecting portion 21, preferably installing elastic sealing ring 4 on sealing portion 22, when the anti -drop piece 2 reverse screw is moved to the limit position of thread connection, make elastic sealing ring 4 not with the thread on needle cylinder outer wall interference, avoid the abrasion of the inner wall of elastic sealing ring 4 to cause the bad sealing effect.

[0027] As Figure 4 The diameter of sealing portion 22 is greater than the diameter of connecting portion 21, when syringe body l is not connected with extension pipe 3, need to install needle to draw medicine and so on, can reverse screw elastic sealing ring 4 to the direction of moving away from needle cylinder, the needle cylinder end of syringe body l is not affected by elastic sealing ring 4 at this time, namely, the needle can be installed on the needle cylinder.

[0028] Preferably, the inner wall of the anti-dropping piece 2 is further provided with a supporting ring 5, which is located at the lower end of the elastic sealing ring 4 and used for supporting the elastic sealing ring 4. When the extension pipe 3 is threadedly connected with the sealing part 22, the lower end of the extension pipe 3 will abut against the elastic sealing ring 4, and under the supporting and bearing of the supporting ring 5, the elastic sealing ring 4 can withstand the downward pressing force of the extension pipe 3. In order to improve the sealing effect between the sealing part 22 and the extension pipe 3, the upper end of the elastic sealing ring 4 is provided with a second sealing groove 7, and the lower end surface of the end portion of the extension pipe 3 is provided with a second sealing protrusion 71 corresponding to the second sealing groove 7. After the extension pipe 3 abuts against the elastic sealing ring 4, the second sealing protrusion 71 enters into the second sealing groove 7, and with the increasing pressure of the extension pipe 3 on the elastic sealing ring 4, the connection between the second sealing protrusion 71 and the second sealing groove 7 is more closely, so as to further improve the sealing effect and reduce the entry of external air into the extension pipe 3 to affect the medicine injection work.

[0029] Preferably, the upper end surface of the supporting ring 5 is provided with a first sealing protrusion 6, and the lower end of the elastic sealing ring 4 is provided with a first sealing groove 61 corresponding to the first sealing protrusion 6. With the downward pressing force of the extension pipe 3 on the elastic sealing ring 4, the connection between the elastic sealing ring 4 and the supporting ring 5 is more closely, and at this time, the connection between the first sealing protrusion 6 and the first sealing groove 61 is also more closely, so as to form double sealing and achieve better sealing effect.

[0030] Preferably, the circumferential outer wall of the anti-dropping piece 2 is provided with an anti-skid protrusion 8, which is used for increasing the friction between the anti-dropping piece 2 during the screwing, so as to more conveniently rotate the anti-dropping piece 2.

[0031] The above merely describes the embodiments of the present application and is not used for limiting the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A needle-retaining syringe for use with a micropump, characterized in that, The injection device comprises a syringe body (1) and a anti-disengaging member (2) connected to the needle cylinder of the syringe body (1), which is used to connect the syringe body (1) and the extension tube (3) firmly. The anti-disengaging member (2) comprises a connecting part (21) connected to the needle cylinder of the syringe body (1) by screwing and a sealing part (22) integrally connected to the connecting part (21), and the diameter of the sealing part (22) is larger than that of the connecting part (21). The circumferential inner wall of the sealing part (22) is screwed to the end of the extension tube (3). An elastic sealing ring (4) is arranged on the inner wall of the anti-disengaging member (2), and the circumferential inner wall of the elastic sealing ring (4) abuts against the outer wall of the needle cylinder of the syringe body (1). When the anti-disengaging member (2) is screwed to the extreme position of the threaded connection of the upper part of the needle cylinder of the syringe body (1), the upper end surface of the elastic sealing ring (4) is flush with the upper end surface of the needle cylinder of the syringe body (1).

2. A needle-retaining syringe for use with a micropump according to claim 1, wherein A supporting ring (5) is arranged on the inner wall of the anti-disengaging member (2), which is located below the elastic sealing ring (4) and used to support the elastic sealing ring (4).

3. A needle-retaining syringe for use with a micropump according to claim 2, wherein The upper end surface of the supporting ring (5) is provided with a first sealing protrusion (6), and the lower end of the elastic sealing ring (4) is provided with a first sealing groove (61) corresponding to the first sealing protrusion (6).

4. The needle-retaining syringe for use in a micropump according to claim 1, wherein When the sealing part (22) is screwed to the extension tube (3), the upper end surface of the elastic sealing ring (4) abuts against the end of the extension tube (3).

5. The needle-retaining syringe for use in a micropump according to claim 1, wherein The upper end of the elastic sealing ring (4) is provided with a second sealing groove (7), and the lower end surface of the end of the extension tube (3) is provided with a second sealing protrusion (71) corresponding to the second sealing groove (7).

6. The needle-retaining syringe for use in a micropump according to claim 1, wherein The circumferential outer wall of the anti-disengaging member (2) is provided with an anti-skid protrusion (8).

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