CN211383187U

CN211383187U - Micro-injection device for tumor treatment

Info

Publication number: CN211383187U
Application number: CN201921694410.5U
Authority: CN
Inventors: 刘素风
Original assignee: Xinxiang First People's Hospital
Current assignee: Xinxiang First People's Hospital
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-09-01
Anticipated expiration: 2029-10-10

Abstract

A micro-injection device for tumor treatment, which effectively solves the problem of residual liquid medicine when the prior injector injects micro-medicine; the needle cylinder comprises a needle cylinder which is axial up and down, a needle head is arranged at the lower end of the needle cylinder, a transmission box is arranged at the upper end of the needle cylinder, a piston head which is positioned at the lower end of the needle cylinder and can move up and down is arranged in the needle cylinder, an annular outer cavity is coaxially arranged in the side wall of the needle cylinder, a threaded rod which is positioned at the rear side of the annular outer cavity and axial up and down is connected to the needle cylinder in a rotating manner, an annular push block which is in threaded connection with the threaded rod is coaxially arranged in the annular outer cavity, the annular push block is tightly attached to the annular outer cavity, a through groove which is communicated with the annular outer cavity is arranged on; the structure is simple, the operation is convenient, the conception is novel, and the practicability is strong.

Description

Micro-injection device for tumor treatment

Technical Field

The utility model relates to an auxiliary instrument technical field of oncology, concretely relates to tumour treatment microinjection device.

Background

Tumour patient is when treating, need carry out the microinjection of liquid medicine usually, treats patient's health, and medical personnel use the microinjector to carry out the medicine injection to the patient usually, but current medicine injector is when carrying out the medicine injection to the patient, because the liquid medicine demand is less, and trace liquid medicine can remain and cause the medicine extravagant at syringe needle and cylinder lower extreme, also can have certain influence to the dose of medicine simultaneously, is unfavorable for tumour patient's treatment.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation, in order to overcome the defects of the prior art, the utility model aims at providing a micro-injection device for tumor treatment, which effectively solves the problem of residual liquid medicine when the prior injector injects micro-medicine.

The technical scheme of its solution is, the utility model discloses an upper and lower axial's cylinder, the cylinder lower extreme is equipped with the syringe needle, the cylinder upper end is equipped with the transmission case, be equipped with in the cylinder and be located its lower extreme and the piston head that can reciprocate, annular exocoel has been seted up to the coaxial in the cylinder lateral wall, it is connected with the threaded rod that is located annular exocoel rear side and upper and lower axial to rotate on the cylinder, the coaxial annular ejector pad that is equipped with threaded rod threaded connection in the annular exocoel, annular ejector pad closely laminates with annular exocoel, set up the logical groove with annular exocoel intercommunication on the cylinder inner edge face, the coaxial rotation of annular exocoel lower extreme is connected with the dog that can shelter.

Compared with the prior art, the beneficial effects of the utility model are that: rational in infrastructure, convenient to use sets up piston head, annular ejector pad, threaded rod, arc wall and leads to the groove, when making this device carry out the medicine injection to the patient, can discharge syringe needle or the remaining liquid medicine of cylinder lower extreme, because of remaining of medicine when preventing the microinjection, leads to the medicine extravagant, is equipped with drive gear and driven gear simultaneously, makes things convenient for the use of this device, this simple structure, convenient operation conceives the novelty, and the practicality is strong.

Drawings

Fig. 1 is an isometric view of the present invention.

Figure 2 is the utility model discloses a partially cut right side and look the axonometric drawing.

Figure 3 is the utility model discloses a partially cut owner and look axonometric drawing.

Fig. 4 is an enlarged view of a in fig. 2 according to the present invention.

Fig. 5 is an enlarged view of B in fig. 3 according to the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

The needle cylinder comprises a needle cylinder 1 in the vertical axial direction, a needle head 2 is arranged at the lower end of the needle cylinder 1, a transmission case 3 is arranged at the upper end of the needle cylinder 1, a piston head 4 which is positioned at the lower end of the needle cylinder and can move up and down is arranged in the needle cylinder 1, an annular outer cavity 5 is coaxially arranged in the side wall of the needle cylinder 1, a threaded rod 6 which is positioned at the rear side of the annular outer cavity 5 and is in the vertical axial direction is rotatably connected to the needle cylinder 1, an annular push block 7 which is in threaded connection with the threaded rod 6 is coaxially arranged in the annular outer cavity 5, the annular push block 7 is tightly attached to the annular outer cavity 5, a through groove 8 which is communicated with the annular outer cavity 5 is formed in the inner edge surface of the needle cylinder 1, a stop block 9 which can shield the.

In order to enable the piston head 4 to move up and down, a sliding groove 11 which is coaxial with the needle cylinder 1 and is communicated up and down is formed in the transmission case 3, the upper end of the piston head 4 is coaxially and rotatably connected with a piston rod 12, the upper end of the piston rod 12 penetrates through the needle cylinder 1 and extends out of the sliding groove 11, and a pressing handle 13 is coaxially arranged at the upper end of the piston rod 12.

In order to rotate the threaded rod 6, the upper end of the threaded rod 6 penetrates through the lower side walls of the needle cylinder 1 and the transmission case 3 and is coaxially provided with a driven gear 14, and a transmission gear 15 which can extend out of the sliding groove 11 and can be meshed with the driven gear 14 is coaxially fixed on the piston rod 12.

In order to limit the position of the transmission gear 15 engaged with the driven gear 14, a slot with an upward opening is formed in the lower side wall of the transmission case 3 and located in front of the sliding groove 11, an insertion block 16 which is in front-back direction and can be contacted with the transmission gear 15 is connected in the slot in a sliding manner, the rear end of the lower surface of the insertion block 16 is an inclined plane with a lower front part and a higher rear part, and the front side wall of the sliding groove 11 is connected with the insertion block 16 through a spring piece 17.

In order to make the insert 16 slide back and forth, a through groove 18 which is in the front-back direction and is positioned above the slot is arranged on the upper side wall of the transmission case 3, and a shifting piece 19 of which the upper end extends out of the through groove 18 and the lower end is fixed with the insert 16 is slidably connected in the through groove 18.

In order to facilitate the rotation of the stop block 9, the outer edge surface of the needle cylinder 1 is provided with a swing groove 20 communicated with the annular outer cavity 5, a swing rod 21 with the front end extending out of the swing groove 20 and the rear end fixed with the stop block 9 is slidably connected in the swing groove 20, and the stop block 9 blocks the swing groove 20.

When the utility model is used, the physiological saline is stored under the annular push block 7 in the annular outer cavity 5, the left side wall of the oscillating rod 21 is contacted with the left side wall of the oscillating groove 20, the arc-shaped groove 10 is not communicated with the through groove 8, and the needle cylinder 1 has no liquid medicine;

inserting the needle head 2 into a medicine bottle, moving the pressing handle 13 upwards, driving the piston head 4 to move upwards by the pressing handle 13 through the piston rod 12, discharging gas in the needle cylinder 1 from the joint of the piston rod 4 and the needle cylinder 1 along with the upward movement of the piston rod 4, simultaneously driving the transmission gear 15 to move upwards by the piston rod 12, driving the insertion block 16 to move forwards and extrude the spring piece 17 by the transmission gear 15 because the rear end of the lower surface of the insertion block 16 is an inclined plane with a low front part and a high rear part, driving the shifting piece 19 to move forwards by the insertion block 16, when the transmission gear 15 is not in contact with the insertion block 16, driving the shifting piece 19 to move backwards by the insertion block 16 under the action of the spring piece 17, and along with the upward movement of the piston head 4, sucking medicine liquid in the bottle into the needle cylinder 1 under the action of air pressure, and stopping moving the pressing handle 13 when proper medicine;

after the liquid medicine is sucked into the needle cylinder 1, the needle head 2 is inserted into a treatment position of a patient, the pressing handle 13 is moved downwards, the pressing handle 13 drives the piston head 4 to move downwards through the piston rod 12, the extracted liquid medicine is pushed into blood of the patient, meanwhile, the piston rod 12 drives the transmission gear 15 to move downwards, when the lower end face of the transmission gear 15 is contacted with the upper end face of the insertion block 16, the pressing handle 13 stops moving, and at the moment, the transmission gear 15 is meshed with the driven gear 14;

when the transmission gear 15 is meshed with the driven gear 14, the swing rod 21 swings rightwards, the swing rod 21 drives the stop dog 9 to rotate anticlockwise, when the right end face of the swing rod 21 is contacted with the right side wall of the swing groove 20, the swing rod 21 stops moving, and at the moment, the arc-shaped groove 10 is communicated with the through groove 8;

when the arc-shaped groove 10 is communicated with the through groove 8, the pressing handle 13 is rotated clockwise, the pressing handle 13 drives the transmission gear 15 to rotate clockwise through the piston rod 12, the transmission gear 15 drives the driven gear 14 to rotate anticlockwise, meanwhile, the driven gear 14 drives the threaded rod 6 to rotate anticlockwise, the threaded rod 6 drives the annular push block 7 to move downwards, at the moment, external air flows into the annular outer cavity 5 from the joint of the threaded rod 6 and the needle cylinder 1, the annular push block 7 extrudes physiological saline in the annular outer cavity 5, the physiological saline flows into the needle cylinder 1 along the arc-shaped groove 10 and the through groove 8, meanwhile, residual liquid medicine is pushed to flow into a patient body through the needle head 2, and the liquid medicine in the needle;

after the injection of the patient is finished, the swinging rod 21 is moved leftwards to enable the swinging rod 21 to return to the initial position, the shifting piece 19 is moved forwards, the shifting piece 19 drives the insertion block 16 to move forwards and press the spring piece 17, when the insertion block 16 is not in contact with the transmission gear 15, the pressing handle 13 is moved downwards, the pressing handle 13 drives the transmission gear 15 to move downwards through the piston rod 12 to enable the pressing handle 13 to return to the initial position, and meanwhile, the piston rod 12 drives the piston head 4 to move downwards and return to the initial position.

Claims

1. A micro-injection device for treating tumor comprises a needle cylinder (1) which is axial up and down, and is characterized in that a needle head (2) is arranged at the lower end of the needle cylinder (1), a transmission case (3) is arranged at the upper end of the needle cylinder (1), a piston head (4) which is arranged at the lower end of the needle cylinder (1) and can move up and down is arranged in the needle cylinder (1), an annular outer cavity (5) is coaxially arranged in the side wall of the needle cylinder (1), a threaded rod (6) which is arranged at the rear side of the annular outer cavity (5) and is axial up and down is connected on the needle cylinder (1) in a rotating way, an annular push block (7) which is in threaded connection with the threaded rod (6) is coaxially arranged in the annular outer cavity (5), the annular push block (7) is tightly attached to the annular outer cavity (5), a through groove (8) which is communicated with the annular outer, an arc-shaped groove (10) with the lower end communicated with the through groove (8) is arranged on the upper end surface of the stop block (9).

2. The microinjection device for tumor therapy according to claim 1, wherein the transmission case (3) is provided with a chute (11) which is coaxial with the syringe (1) and is vertically through, the upper end of the piston head (4) is coaxially and rotatably connected with a piston rod (12), the upper end of the piston rod (12) penetrates through the syringe (1) and extends out of the chute (11), and the upper end of the piston rod (12) is coaxially provided with a pressing handle (13).

3. The micro-injection device for tumor therapy according to claim 1, wherein the upper end of the threaded rod (6) penetrates through the lower side walls of the syringe (1) and the transmission box (3) and is coaxially provided with a driven gear (14), and the piston rod (12) is coaxially fixed with a transmission gear (15) which can extend out of the sliding groove (11) and can be meshed with the driven gear (14).

4. The microinjection device for tumor therapy according to claim 1, wherein the lower sidewall of the transmission case (3) is provided with an insertion slot with an upward opening and located in front of the sliding slot (11), the insertion slot is slidably connected with an insertion block (16) which is in front-back direction and can contact with the transmission gear (15), the rear end of the lower surface of the insertion block (16) is an inclined surface with a lower front end and a higher rear end, and the front sidewall of the sliding slot (11) is connected with the insertion block (16) through a spring piece (17).

5. The microinjection device for tumor therapy according to claim 1, wherein the upper sidewall of the transmission case (3) is provided with a through slot (18) located above the slot in the front-back direction, and a shifting piece (19) having an upper end extending out of the through slot (18) and a lower end fixed to the insert block (16) is slidably connected to the through slot (18).

6. The microinjection device for tumor therapy according to claim 1, wherein the outer surface of the needle cylinder (1) is provided with a swing groove (20) communicated with the annular outer cavity (5), the swing groove (20) is slidably connected with a swing rod (21) having a front end extending out of the swing groove (20) and a rear end fixed with the stopper (9), and the stopper (9) shields the swing groove (20).