Disclosure of Invention
In view of the above, the present invention is directed to a medical injector, which can pull out an injection needle from an injection tube without touching the injection needle by a medical worker, so as to protect the medical worker.
In order to solve the technical problems, the technical scheme of the invention is as follows: a medical injector comprises an injection tube and an injection push rod arranged in the injection tube, wherein a rubber plug is arranged at the end part of the injection push rod, the periphery of the rubber plug is abutted against the inner cylinder wall of the injection tube, and an injection needle is sleeved at the end part of the injection tube;
the syringe comprises a syringe body, a syringe needle, a push needle cavity, a push needle part, a sealing piece, a driving block and a sealing piece, wherein the syringe body is provided with a push needle cavity in the wall, the push needle part comprises a push needle rod, the wall of the syringe body is provided with a pressing hole and a driving hole, the pressing hole penetrates through the push needle cavity and the wall of the outer cylinder of the syringe body, the driving hole penetrates through the push needle cavity and the wall of the inner cylinder of the syringe body, the driving hole is internally provided with the sealing piece so as to seal the driving hole, the push needle rod is provided with the pressing block and the driving block, the pressing block penetrates through the pressing hole and protrudes out of the wall of the outer cylinder of the syringe;
the push needle rod can move up and down along the push needle cavity, a touch rod is arranged on the push needle rod, one end of the touch rod is connected with the push needle rod, and the other end of the touch rod penetrates through the outer cylinder wall of the injection cylinder and can touch the injection needle head;
the injection push rod can generate extrusion force towards the direction of the injection needle to the driving block, the push rod can push the contact rod to move towards the direction of the injection needle, and the contact rod pushes the injection needle to be separated from the injection tube.
Through the technical scheme, after the injector is used once, medical personnel can press the pressing block into the injection tube, the sealing sheet can be broken by the driving block on the push rod and the driving block can be positioned in the injection tube, then the medical personnel pushes the injection push rod towards the direction of the injection needle head, the end part of the injection push rod can be pressed against the driving block and enables the push rod and the contact rod to move towards the direction of the injection needle head, the contact rod can extrude the injection needle head, the injection needle head can be separated from the injection tube, the injection needle head can be detached without touching the injection needle head by hands of the medical personnel, and the effect of protecting the medical personnel is strong;
in addition, the sealing sheet is also punctured simultaneously, and this injection cylinder also can receive direct destruction, prevents the malicious recycle of secondary.
Preferably, the end of the pressing block close to the sealing sheet is provided with a tip.
Through above-mentioned technical scheme, set up most advanced on pressing the briquetting, the sealing piece is punctureed more easily to the most advanced that enables to press the briquetting.
Preferably, the needle pushing cavity can be used for the needle pushing rod to move along the radial direction of the injection cylinder along the radial direction cavity diameter of the injection cylinder.
Through above-mentioned technical scheme, when medical personnel pressed the pressing block, whole push pin pole can produce along the radial direction of injection cylinder and remove.
Preferably, a spring is arranged in the push needle cavity and can generate elastic force to the push needle rod in the direction away from the injection needle head.
Through above-mentioned technical scheme, spring force can apply on the push pin pole to when the push pin pole does not receive to syringe needle direction thrust effect, the spring enables push pin pole and conflict pole and is located the direction that deviates from the syringe needle, and then guarantees the stability of being connected between syringe needle and the injection tube.
Preferably, the spring is located at a position on one side of the needle pushing rod close to the injection needle, a sliding block is arranged on the cavity wall of the needle pushing cavity in a sliding mode, two ends of the spring are connected to the sliding block and the needle pushing rod respectively, and the sliding direction of the sliding block is consistent with the moving direction generated after the needle pushing rod is pressed.
Through above-mentioned technical scheme, when the push pin pole moved toward injection tube middle part position, the push pin pole can drive spring and slider and produce and remove, and the slider slides and connects on the chamber wall in push pin chamber, can not only promote the installation stability between push pin pole and the conflict pole two, can promote the mobility stability between the two in addition.
Preferably, the number of the needle pushing parts is two, and the two needle pushing parts are symmetrically distributed on the injection cylinder.
Through above-mentioned technical scheme, medical personnel's accessible is pressed simultaneously and is pushed the pressing block in the needle pushing portion, and then makes the drive block that corresponds in the needle pushing portion salient in the inner tube wall of injection tube, then promotes the injection push rod again, and the injection push rod can conflict with two drive blocks simultaneously, and two conflict poles can produce thrust to the syringe needle simultaneously, and the syringe needle can break away from with the injection tube production more easily.
Preferably, be equipped with annular mounting groove on the circumference wall of the pole of injection push rod, the rubber buffer cover is located in the mounting groove, the tip that the injection push rod is close to the syringe needle is equipped with the conflict board of stereoplasm, punctures gasket (11) and enters into back in injection tube (1) when drive block (13), conflict board (17) face can offset with drive block (13).
Through the technical scheme, firstly, the sealing property between the injection push rod and the inner cylinder wall of the injection cylinder can be ensured; secondly, because the quantity of pushing away the needle portion is two, need carry out conflict simultaneously to the drive block in two pushing away needle portions, adopt stereoplasm touch panel can carry out conflict simultaneously to two conflict poles, and two pushing away needle bars can take place synchronization action, and the syringe needle can deviate from the injection tube more smoothly.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings 1-2 to make the technical solution of the present invention easier to understand and grasp.
The utility model provides an injection syringe for medical treatment, includes injection tube 1, injection push rod 2, is equipped with the injection chamber in injection tube 1, and the tip cover at injection tube 1 is equipped with syringe needle 4, is equipped with annular mounting groove 16 on injection push rod 2's the circumference pole wall, and the cover is equipped with rubber buffer 3 in mounting groove 16, and injection push rod 2 is close to the tip of syringe needle 4 and is equipped with the conflict board 17 of stereoplasm. Wherein, the periphery of the rubber plug 3 is contacted with the inner cylinder wall of the injection cylinder 1.
A needle pushing cavity 5 is arranged in the wall of the injection tube 1, and needle pushing parts 6 are arranged in the needle pushing cavity 5, in this embodiment, the number of the needle pushing parts 6 is two, and the two needle pushing parts 6 are symmetrically distributed on the injection tube 1.
For the needle pushing parts 6, each needle pushing part 6 comprises a needle pushing rod 7, the cylinder wall of the injection cylinder 1 is provided with a pressing hole 9 and a driving hole 10, the pressing hole 9 penetrates through the needle pushing cavity 5 and the outer cylinder wall of the injection cylinder 1, and the driving hole 10 penetrates through the needle pushing cavity 5 and the injection cavity of the injection cylinder 1.
A sealing sheet 11 is arranged in the driving hole 10 to seal the driving hole 10, and the material of the sealing sheet 11 can be rubber. The push rod 7 is provided with a push block 12 and a drive block 13. The needle pushing cavity 5 can move along the radial direction of the injection tube 1 by the needle pushing rod 7. The pressing block 12 passes through the pressing hole 9 and protrudes from the outer cylindrical wall of the syringe 1. The driving block 13 passes through the driving hole 10, and the pressing block 12 is provided with a tip 14 at the end close to the sealing sheet 11, so that the driving block 13 can pierce the sealing sheet 11 and extend out of the inner cylinder wall of the syringe 1 by pressing the pressing block 12.
The push needle rod 7 can move up and down along the push needle cavity 5, a touch rod 8 is connected on the push needle rod 7, one end of the touch rod 8 is connected with the push needle rod 7, and the other end of the touch rod passes through the outer cylinder wall of the injection tube 1 and can touch the injection needle 4.
A spring 15 is arranged in the needle pushing cavity 5, and the spring 15 can generate elastic force to the needle pushing rod 7 in the direction away from the injection needle 4. The spring 15 is positioned at one side of the push needle rod 7 close to the injection needle 4, a slide block 18 is arranged on the cavity wall of the push needle cavity 5 in a sliding mode, two ends of the spring 15 are respectively connected to the slide block 18 and the push needle rod 7, the sliding direction of the slide block 18 is consistent with the moving direction generated after the push needle rod 7 is pressed, and the sliding direction of the slide block 18 is perpendicular to the length direction of the injection tube 1.
The injection push rod 2 can generate extrusion force towards the direction of the injection needle head 4 to the pressing block 12, the push rod 7 can push the contact rod 8 to move towards the direction of the injection needle head 4, and the contact rod 8 pushes the injection needle head 4 to be separated from the injection tube 1.
In the specific implementation process:
under the normal use environment, the pressing block 12 of the push rod 7 passes through the pressing hole 9 and protrudes out of the outer cylinder wall of the injection cylinder 1, the driving block 13 is positioned in the driving hole 10, a gap is left between the tip 14 on the driving block 13 and the sealing sheet 11, the elastic force of the spring 15 is applied to the push rod 7, and the push rod 7 and the abutting rod 8 are positioned in the direction departing from the injection needle head 4; the medical personnel hold the outer cylinder wall of the injection tube 1 by hands and push the injection push rod 2, the rubber plug 3 of the injection push rod 2 can slide along the inner cylinder wall of the injection tube 1, and the injection in the injection tube 1 can be smoothly sprayed out from the injection needle head 4.
After this syringe used once, medical personnel's hand is pressed pressing block 12, move push pin rod 7 toward the inside of injection tube 1, push pin rod 7 can slide through spring 15 pulling slider 18, most advanced 14 on the driving block 13 can pierce sealing piece 11 and extend outstanding in injection tube 1, medical personnel inject injection push rod 2 again, the conflict board 17 of injection push rod 2 can produce the extrusion to driving block 13, push pin rod 7, pressing block 12, conflict pole 8 can move toward 4 directions of injection needle, spring 15 can receive the extrusion, the tip of conflict pole 8 can take place the conflict with injection needle 4, injection needle 4 alright follow 1 tip of injection tube and deviate from.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.