KR20030078345A - automatic injector for prevention epidemics of livestock - Google Patents

Abstract

PURPOSE: An automatic injector for animal disinfection is provided to enable a continuous use for a long time, apply it to every animal and perform a disinfection injection onto a great mass of animals. CONSTITUTION: The automatic injector comprises: an injector main body(10) which automatically provides a constant amount of an agent by supplying a power source; and an injecting gun(60) which receives the agent exhausted from the injector main body(10) and puts the agent into animals simultaneously with the insertion of an injection needle(62) to the animals. By this, the injector puts the agent continuously by the control of a controller(2).

Description

Automatic Injector for Prevention epidemics of livestock}

The present invention relates to an automatic syringe for livestock quarantine, and more particularly, a syringe body for supplying power and automatically providing a certain amount of medicine, and a medicine discharged from the syringe body to receive the needle and insert the needle into the livestock. The automatic injection machine, which is divided into injection guns that allow the injection of medicaments, enables continuous injection of medicines under the control of the controller, and enables the rapid injection of injection liquids into large quantities of livestock It is a syringe.

In general, the law regulates contributing to the development of livestock industry and the improvement of public health by preventing the spread or spread of infectious diseases of livestock such as pigs, cows and chickens. The use of quarantine injections per animal is widely applied.

The syringe used in this manner uses a general syringe consisting of a piston rod installed in the coil spring, a medicine container formed in the syringe body, a handle for advancing the electric piston rod, and the like.

However, the conventional syringe as described above is a method in which the operator must inject the medicine by pushing the handle while the needle is inserted into the body of the livestock, in particular, when injecting the pig, the pig feels pain as soon as the needle is stuck By doing so, there is a serious disadvantage that the drug cannot be injected effectively.

Therefore, as in 1999 Patent Application No. 034496 issued by the applicant of the present invention, a pneumatic cylinder for pneumatically pushing the medicine supplied to the drug supply means, a pneumatic valve for supplying and discharging the pneumatic pressure to the pneumatic cylinder, A pneumatic unit connected to the pneumatic valve by a pneumatic supply tube to supply pneumatic pressure, and pneumatic drive means for operating the pneumatic valve by injecting the needle into the livestock, thereby making it possible to inject the injection needle into the livestock. Pneumatic livestock quarantine injection device that has the effect of greatly improving the injection work efficiency by allowing the injection has been devised.

However, the above-described pneumatic livestock quarantine injection apparatus is to be injected into the pneumatic pressure by using a gas cylinder, there is a disadvantage that it is impossible to use the injection device for a long time by a limited amount of pneumatic pressure, of course, the compressed air inside the gas cylinder In the state of using all the compressed air to the inside of the cylinder to be charged, but in general livestock farms are not equipped with the means for filling such compressed air has to use cumbersome filling station, the filling device is also very expensive, so easy to purchase There is a problem that comes with restrictions on use.

The present invention has been made in order to eliminate the problems described above, a syringe body for automatically supplying a certain amount of medicine by supplying power, and the medicine is discharged from the syringe body to receive the needle is inserted into the livestock and at the same time By an autoinjector which is divided into injection guns to be injected and continuously administers medicines under the control of a controller,

It can be used continuously by easily charging the battery in the main body using the home power supply, and can control the amount of movement of the cylinder and piston to inject the correct amount of medicine, and it is possible to continuously administer the medicine to prevent large quantities of livestock in a short time. It is an object of the present invention to provide an automatic syringe for livestock quarantine that can be injected.

As technical means for achieving the above object, known medicine discharging means by a nozzle for supplying the medicine inside the medicine container and discharged only to one side, a plunger retracting means for causing the piston inside the nozzle to reciprocate back and forth, and retreat Plunger movement detecting means for controlling the retraction action by recognizing the movement amount of the moved plunger, Plunger retraction fixing means for fixing the position of the plunger when the movement amount of the plunger is detected by the plunger movement detecting means, the electric plunger is rapidly Plunger power control means for cutting off or connecting the power to retract the plunger at the moment of advancing, drug injection reaction means for inserting the needle into the livestock and at the same time the drug provided from the syringe body is rapidly administered.

1 is an overall configuration of the present invention automatic syringe

Figure 2 is a front sectional view of the main body of the present invention automatic syringe

3 is a cross-sectional view of the main body of the present invention automatic syringe

Figure 4 is a bottom sectional view of the main body of the present invention automatic syringe

Figure 5 is a side cross-sectional view of the main body of the present invention automatic syringe

Figure 6 is a detailed cross-sectional view of the main body injection liquid discharge port of the present invention automatic syringe

Figure 7 is a perspective view showing the main body plunger operating state of the main syringe

Figure 8 is a perspective view showing a sensor sensitive state according to the operation of the main body plunger of the present invention automatic syringe

9 is a perspective view showing the main body plunger reversing and stopping state of the present invention automatic syringe

10 is a perspective view showing the operating state of the main motor gear and planetary gear of the present invention automatic syringe

Figure 11 is a side view showing a cross-sectional view of the injection gun of the present invention automatic syringe

Figure 12 is an enlarged cross-sectional view showing in detail the injection gun operating portion of the automatic syringe according to the present invention

Explanation of symbols on the main parts of the drawings

1: Body 2: Controller

3: main battery 4: medicine

5: nozzle 6: piston

7: Plunger 8: Compression Spring

10: syringe body

20: plunger retracting means 21: drive motor

22: reducer 23: motor gear

24: rack 25: planetary gear

26: children gear

30: plunger movement detecting means 31,31 ': groove

32: sensor plate 33: inductive sensor

40: plunger retraction fixing means 41,41 ': locking jaw

42: plunger stopper 43: hook

44: trigger 45: trigger solenoid

50: plunger power control means 51: rotary latch

52: latch solenoid

60: injection gun 61: battery

62: needle 63: guider

64: needle fixing tube 65: drug tube

66: body

70: drug injection reaction means 71: pressing mouth

72: push switch 73: needle spring

74: circuit board

Hereinafter, preferred embodiments of the present invention will be described.

Figure 1 is a front view schematically showing the overall configuration of the automatic syringe of the present invention, Figure 2 is a front sectional front view of the main body of the present invention autoinjector, Figure 3 is a top plan sectional view of the main body of the present invention autoinjector, Figure 4 Is a bottom cross-sectional view of the main body, and FIG. 5 is a cross-sectional side view of the main body of the present invention.

The controller 2 is coupled to the upper portion of the body 1 on the enclosure, and one side of the body 1 is equipped with a main battery 3 for supplying power, and the other side of the body 1 includes a medicine container 4. The nozzle 5 to be combined is protruded,

Inside the body 1 there is a built-in piston (6) sliding in the interior of the nozzle (5) and the plunger (7) for causing the piston 6 to reciprocate back and forth,

The plunger 7 includes a plunger retracting means 20 for retracting the plunger 7, a plunger movement detecting means 30 which detects and stops the movement amount of the plunger 7, and a plunger retracting means 20. The plunger retraction fixing means 40 for fixing the plunger 7 retracted by the plunger, and the plunger power interrupting means 50 for controlling the power for retracting the plunger 7 are combined,

One end of the plunger (7) and the syringe body (10) that is installed in the compression spring (8);

A battery 61 is built into the body 66, and one side end of the body 66 couples a guider 63 having a needle 62 fixed to the needle fixing tube 64.

The guider 63 described above is formed separately by the injection gun 60 formed in connection with the drug injection reaction means 70 for inserting the injection needle 62 into the livestock and at the same time the drug is introduced,

The medicine provided from the syringe body 10 is connected to the needle 5 of the syringe body 10 of the syringe body 10 and the needle gun 60 of the injection gun 60 by the separate medicine tube 65. It is configured to be discharged through.

In addition, the plunger retracting means 20 described above includes the driving motor 21 and the plunger 7 of the motor gear 23 and the plunger 7 drawn out from the reduction gear 22 of the driving motor 21 embedded in the body 1. The rack 24 coupled to the outer side is formed by connecting the planetary gear 25 and the idle gear 26, and the power of the driving motor 21 is transmitted to the rack 24 so that the plunger 7 is retracted. ,

The plunger movement detecting means 30 couples a sensor plate 32 having a plurality of grooves 31, 31 ′ formed at an outer lower side of the plunger 7, and a known sensitive sensor ( By combining the 33, the response sensor 33 is configured to transmit the recognition according to the movement of the grooves 31 and 31 'of the sensor plate 32 coupled to the retracting plunger 7.

In addition, the plunger retraction fixing means 40 forms a plunger stopper 42 having a plurality of locking jaws 41 and 41 'formed on the outer upper side of the plunger 7, and above the plunger stopper 42. The hinge 44 is fixed to the end of the trigger 44, the latch 44 is formed at one end, the upper one end of the trigger 44 is equipped with a trigger solenoid 45 for pressing and rotating the trigger 44, the trigger ( 44) and the trigger solenoid 45 is configured to perform the position fixing and releasing action of the plunger 7,

The plunger power interrupting means 50 separates the motor gear 23 withdrawn from the drive motor 21 for retracting the plunger 7 and the planetary gear 25 meshed with the motor gear 23. The shaft is coupled by the 51, the center of the rotating latch 51 is hinged to the motor gear 23 and the planetary gear 25 is hinged to one side end of the rotating latch 51, the rotation is rotated, The planetary gear 25 and the idle gear 26 are intermittent as the latch 51 rotates, and the rotational action of the rotary latch 51 is formed by the latch solenoid 52 formed at the other end of the rotary latch 51. It is configured to be made.

In addition, the drug injection reaction means 70 is formed by extending the pressing hole 71 on one side of the guider 63, the push switch 72 is mounted on the end side of the pressing hole 71, The guider 63 is elastically installed by the needle spring 73 to the needle fixing tube 64 coupled to the body 66, the push switch 72 is coupled to the circuit board 74, the guider 63 sliding back and forth And the pusher 71 allow the push switch 72 and the circuit board 74 to transmit an electrical signal to the controller 2 of the syringe body 10.

In the figure, reference numeral 100, 100 'is a check valve, 101 is a transmitter, 102 is a receiver, 103 is an emergency switch, 104, 105 is a return spring.

The overall operation and detailed operation relationship of each of the present invention auto-injector having the above configuration will be described in more detail by the accompanying drawings.

First, when explaining the overall operating relationship of the automatic syringe of the present invention, the operator specifies the discharge amount of the drug to be injected by operating the controller 2 formed on the upper side of the syringe body (1).

When the discharge amount of such medicine is specified, the drive motor 21 inside the body 1 is automatically rotated to retract the plunger 7, and the retracting plunger 7 is moved by a separate inductive sensor 33. When it reaches a constant retraction distance by sensing, the signal is transmitted to stop the driving motor 21 and at the same time to fix the retracted plunger 7 by the trigger 44.

In addition, since a separate compression spring 8 is installed on the rear side of the aforementioned plunger 7, the retracting plunger 7 is elastically supported by the elastic force of the compression spring 8,

As shown in FIG. 6, the piston 6 inside the nozzle 5 retreats at the same time as the retracting action of the plunger 7 described above, and inhales a predetermined amount of medicine in the medicine container 4.

In addition, since the check valves 100 and 100 'are coupled to the nozzle 5, the side to which the medicine container 4 is coupled, and the side to which the medicine is discharged, respectively, the medicine is discharged from the medicine container 4 by this. Only the suction is possible, and the medicine inside the sucked nozzle 5 is in a state capable of only discharge to the drug tube 65 side.

In this state, the needle 62 exposed at one end of the separate injection gun 60 is inserted into the subcutaneous of the livestock, and at the same time, the guider 62 at the rear end of the needle 62 retreats and transmits an electric signal. 101 transmits the signal to the syringe body 10 by the receiver 102 of the body 1 and at the same time fixes the plunger 7 which has been compressed and retracted by the compression spring 8 and The trigger 44 is forcibly rotated by the trigger solenoid 45 to cause the plunger 7 which is electrically driven by the elastic force of the compression spring 8 to move forward at high speed.

Thus, the advancing plunger 7 forwards the retracted piston 6 together, and as the piston 6 moves forward, the medicine inside the nozzle 5 is injected into the injection gun 60 along the chemical tube 65. It is discharged to the needle (62).

In addition, the plunger 7 that has been advanced is retracted by the rotation of the drive motor 21 to be in the state of waiting for drug discharge, so that the continuous injection of the drug is possible.

In more detail the operating relationship of each major component according to the overall operating state,

First, the retraction of the plunger 7 having a compression force by the compression spring 8 and retreating is shown by the plunger retracting means 20 as shown in FIG. 7, and the rack 24 is disposed on one side of the plunger 7. ) Is coupled and the drive motor 21 is mounted in the direction in which the rack 24 is coupled, so that the motor gear 23 decelerated and drawn out by the reduction gear 22 of the drive motor 21 is The rack 24 is engaged with the planetary gear 25 and the idle gear 26 described above.

Accordingly, when the driving motor 21 rotates, power is transmitted to the motor gear 23, the planetary gear 25, and the idle gear 26, and the rack 24 is retracted from the fixed plunger 7.

In addition, the plunger movement detecting means 30 for detecting the amount of movement of the retracting plunger 7 and transmitting it as an electrical signal is coupled to the sensor plate 32 on the bottom of the plunger 7, as shown in FIG. A plurality of grooves 31 and 31 'are formed on one side of the sensor plate 32, and a well-known induction sensor 33 is placed on the upper and lower portions of the grooves 31 and 31' for the response. Since the sensor 33 detects the movement amount of the grooves 31 and 31 ′, the retraction movement amount of the plunger 7 is recognized.

That is, the electric sensitive sensor 33 is a conventional optical sensor, the first step of the groove (31, 31 ') formed in the sensor plate 32 passes through the sensitive sensor 33 in one step Recognizing and recognizing the amount of the specified drug from the controller 2 of the body (1), that is, the moment corresponding to the steps of 1 to about 10 steps to cut off the power of the drive motor 21, the retraction of the plunger 7 Will be stopped.

Therefore, the plunger movement detecting means 30 described above is plunger by the sensor plate 32 and the sensitive sensor 33 of the plunger 7 when the plunger 7 retreats to discharge the designated amount of the medicament from the user. The driving motor 21 is controlled by recognizing the retraction amount of (7) so that the correct amount of drug input is measured.

In addition, as described above, after the plunger 7 is retracted by a certain amount, the medicine is filled in the nozzle 5, and the medicine should not be discharged until the needle 62 is inserted into the livestock. Since the retracted plunger 7 should be fixed by a separate fixing device, the plunger 7 which has been previously fixed by the separate plunger retracting fixing means 40 is fixed.

Since the power of the drive motor 21 acts as a damping function at the high speed of the plunger 7, it prevents the rapid injection of the medicament, so when the plunger 7 is fixed after retreating, the power is automatically cut off and the plunger is separated. The plunger 7 retracted by the retraction fixing means 40 should be fixed.

The plunger retraction fixing means 40 is fixed by mutual engagement of the plunger stopper 42 and the separate trigger 44 coupled to the upper portion of the plunger 7, as shown in FIG. 9, the plunger stopper 42 ), A plurality of locking jaws 41 and 41 'are continuously formed on the upper side thereof, and a trigger 44 having a locking port 43 formed at one end thereof is coupled to the locking jaws 41 and 41'. will be.

In addition, since the trigger 44 is inserted into the latching jaws 41 and 41 'of the plunger stopper 42 in which only one end of the latch 43 is inserted, when the plunger 7 retreats, the plunger stopper ( While the latching opening 43 of the trigger 44 slides on the engaging jaws 41 and 41 'of the 42, the retraction of the plunger 7 can be performed without resistance.

When the plunger 7 intends to move forward, the catching opening 43 of the trigger 44 is inserted into and fixed to the catching jaws 41 and 41 'to suppress the advancement of the plunger 7.

That is, since the inclined surface is formed in the backward direction of the plunger stopper 42 and the vertical surface is formed in the forward direction, the locking hole 43 is engaged with the plunger stopper 42 when the plunger 7 is moved backward. The inclined surfaces of the jaws 41, 41 ′ and the locking holes 43 slide together, and the plunger 7 naturally retreats. On the contrary, when the plunger 7 is to be advanced, the locking holes 43 of the trigger 44 are moved. ) The locking jaws 41 and 41 ′ are caught on the inclined surface and the plunger 7 is not advanced.

In addition, a separate return spring 104 is coupled to the aforementioned trigger 44 so that the latching opening 43 of the trigger 44 is always locked by the return spring 104 by the return spring 104. By pressing 41 '), it is possible to suppress the advancement of the plunger 7 more effectively.

In this fixed state, when the drug discharge signal is received from the injection gun 60, the trigger solenoid 45 formed at one end of the trigger 44 operates to rotate the hinge fixed trigger 44, thereby triggering 44 As the locking hole 43 of the trigger 44 and the locking jaw 41 and 41 'of the plunger stopper 42 are separated by the rotation of the plunger 7, the plunger 7 which is elastically supported by the compression spring 8 is fastened. To be advanced.

The forward action of the plunger 7 is to advance the piston (6) together to discharge the drug filled in the nozzle (5) to the injection gun (60) side through the drug tube (65).

In addition, the power of the drive motor 21, which was connected to the rack 24 of the plunger 7 in order to retract the plunger 7 as described above, is to be separated at the same time as the retraction fixation of the plunger 7,

Such a power interruption action is performed by the plunger power interruption means 50 as shown in FIG. 10. As described above, the retraction action of the plunger 7 is performed by the motor gear 23 and the planetary gear of the drive motor 21. As a combination of the 25 and the idle gear 26,

The motor gear 23 and the planetary gear 25 are forcibly rotated by separate rotational latches 51 to separate the engagement relationship between the planetary gears 25 and the idler gears 26, so that the plunger 7 moves forward. The forward force is transmitted to the drive motor 21 to prevent the speed from being lowered or the load applied to the drive motor 21.

That is, after the plunger 7 is retracted by the drive motor 21 to a desired target, and the plunger 7 is fixed by the separate plunger retraction fixing means 40, the latch solenoid which has pressed the rotary latch 51 is pressed. (52) is operated and the rotary latch 51 is retractable, the retractable rotary latch 51 is rotated to the rear by the return spring 105 to separate the planetary gear 25 and the idle gear (26) It is to let.

In addition, when the plunger 7 moves forward and the chemical is injected, the latch solenoid 52 is operated again to rotate the rotary latch 51, and the planetary gear 25 separated by the rotation of the rotary latch 51. Since the idle gear 26 is engaged again, the power of the driving motor 21 is transmitted to the rack 24 and the plunger 7 so that the plunger 7 is retracted.

The organic operating relationship inside the syringe body 10 is operated by a signal provided from a separate injection gun 60, and the drug should be injected by the injection gun 60 or the plunger 7 when the injection is finished. Is to move forward or backward and to fill and discharge the drug inside the nozzle.

That is, a battery 61 for supplying power to the circuit board 74 and the transmitter 101 is built in the body 66 of the scan gun 60, as shown in FIG. On one side of the tubular guider 63 inside the needle 62 is fixed to protrude.

In addition, the guider 63 can be reciprocated back and forth while the needle 62 is coupled to the needle fixing tube 64 to which the drug tube 65 for delivering the drug provided from the syringe body 10 is coupled. will be.

In the coupling structure of the needle 62, the needle 62 is inserted into the subcutaneous of the livestock, and at the same time the guider 63 retreats and transmits a drug discharge signal, as shown in FIG. The means 70 is a needle 62 is inserted into the subcutaneous of the livestock, guided by the needle spring 73, the guider 63, which was protruding, is pressed by the livestock skin when the guider 63 is needle The spring 73 is compressed and retracted, and the retraction action of the guider 63 simultaneously retracts the pusher 71 protruding from one side of the guider 63, so that the end side circuit board 74 of the pusher 71 is retracted. Press the push switch 72 coupled to the pressing by the retracting pusher 17, so that the signal of the push switch 72 is sent to the receiving unit 102 of the syringe body 10 through the transmitting unit 101 The plunger 7 is moved forward to allow the drug to be discharged.

In addition, in the above embodiment, the remote control by the receiver 102 and the transmitter 101 is possible, but may be changed to a wired connection structure.

In addition, in addition to the automatic drug discharge action by the guider 63 as described above, by pressing a separate emergency switch 103 formed on the upper side of the body 66 to force the drug is discharged, it is possible to discharge the drug in an emergency It is also possible to combine the manual operation methods.

After the process of discharging the drug as described above, the plunger 7, which has been advanced, is automatically retracted to the initial retracted position by the control of the controller 2, and the automatic retraction of the plunger 7 is performed by the medicine container ( 4) Since the medicine inside is to be filled again inside the nozzle (5) is to be a drug discharge standby state.

Therefore, the medicine can be rapidly introduced into the livestock by the insertion of the needle 62 and the retraction of the guider 63, so that not only a very fast and large-scale livestock quarantine can be carried out, but also embedded in the body 1. The main battery 3, that is, the controller 2 and the driving motor 21, the trigger solenoid 45, the latch solenoid 52, and the like to charge the main battery (3) for supplying power, so the continuous and continuous use This would be possible.

Livestock quarantine automatic injection machine as described above can be easily used by continuously charging the battery in the main body using a domestic power source, can control the amount of movement of the cylinder and the piston can be injected into the correct metering, continuous drug Because it is possible to administer, it is effective to carry out quarantine injections to a large amount of livestock in a short time.

Claims (6)

The controller 2 is coupled to the upper portion of the body 1 on the enclosure, and one side of the body 1 is equipped with a main battery 3 for supplying power, and the other side of the body 1 includes a medicine container 4. A nozzle 5 to be coupled is formed to protrude, and a body 6 includes a piston 6 sliding inside the aforementioned nozzle 5 and a plunger 7 for reciprocating the piston 6 back and forth. , The plunger 7 includes a plunger retracting means 20 for retracting the plunger 7, a plunger movement detecting means 30 which detects and stops the movement amount of the plunger 7, and a plunger retracting means 20. The plunger retracting fixing means 40 for fixing the plunger 7 retracted by the plunger and the plunger power interrupting means 50 for controlling the power for retracting the plunger 7 are combined, and the plunger 7 At one end of the syringe body 10, which was compressed into a compression spring (8); A battery 61 is built in the body 66, and one side end of the body 66 couples a guider 63 in which a needle 62 fixed to the needle fixing tube 64 is embedded, and the electric guider (63) is divided into injection guns (60) formed in connection with the drug injection reaction means (70) to insert the needle at the same time as the injection needle 62 is inserted into the livestock, respectively, The medicine provided from the syringe body 10 is connected to the needle 5 of the syringe body 10 of the syringe body 10 and the needle gun 60 of the injection gun 60 by the separate medicine tube 65. Livestock quarantine auto-injector, characterized in that the discharge through. The method of claim 1, wherein the plunger retracting means 20, The planetary gear includes a drive motor 21 embedded in the body 1 and a rack 24 coupled to an outer side of the plunger 7 and the motor gear 23 drawn out from the reducer 22 of the drive motor 21. (25) and the idle gear (26) is formed, the power of the drive motor 21 is transmitted to the rack 24, the livestock quarantine auto-injector, characterized in that the plunger (7) is retracted. The method of claim 1, wherein the plunger movement detecting means 30, A sensor plate 32 having a plurality of grooves 31 and 31 ′ is coupled to an outer lower side of the plunger 7, and a well-known sensitive sensor 33 is coupled to the sensor plate 32 to retreat. Livestock quarantine auto-injector, characterized in that the sensor (32) coupled to the movement of the grooves (31) (31 ') of the sensor plate 32 coupled to the cognitive transfer. 2. The plunger retraction fixing means 40 according to claim 1, A trigger having a plunger stopper 42 having a plurality of locking jaws 41 and 41 ′ formed on an outer upper side of the plunger 7, and a locking hole 43 formed at one end thereof on the upper side of the plunger stopper 42. The hinge 44 is fixed, but the upper sole end of the trigger 44 is equipped with a trigger solenoid 45 for pressing and rotating the trigger 44, and the plunger 44 is triggered by the trigger 44 and the trigger solenoid 45. A livestock quarantine machine, characterized in that to perform the position fixing and releasing action of (7). The method of claim 1, wherein the plunger power control means 50, The motor gear 23 withdrawn from the drive motor 21 for retracting the plunger 7 and the planetary gear 25 engaged with the motor gear 23 are axially coupled by a separate rotary latch 51, The center portion of the rotary latch 51 is hinged to the motor gear 23 and the planetary gear 25 is hinged to one end of the rotary latch 51, the planetary latch according to the rotation of the rotary latch 51 The gear 25 and the idle gear 26 is intermittent, and the rotation action of the rotary latch 51 is made by the latch solenoid 52 formed on the other end of the rotary latch 51 Dragon syringe. According to claim 1, Drug administration reaction unit 70, The pusher 71 extends on one side of the guider 63, and the push switch 72 is mounted on the end side of the pusher 71, but the guider 63 is a needle coupled to the body 66. Resilient installation to the fixed tube 64 by the needle spring 73, the push switch 72 is coupled to the circuit board 74, the push switch 72 by the guider 63 and the pusher 71 to slide back and forth. And circuit board 74 to transmit the electrical signal to the controller (2) of the syringe body (10).