KR102599496B1 - Percussion device for needleless injector - Google Patents

Abstract

The disclosed percussion device for a needleless syringe includes a percussion guide that retracts when in contact with an object; A percussion nut whose front end is coupled to the percussion guide and whose rear end is coupled with a gap to the case of the needle-free syringe; A percussion spring disposed between the percussion nut and the case; A sensor pin coupled to the case so that the front end is coupled to the percussion guide and retracts together when the percussion guide retracts; And it may include a trigger sensor that is coupled to the case and provides a firing signal to the control unit of the needle-free syringe when it detects the retraction of the sensor pin.

Description

Percussion device for needleless injector}

The present invention relates to a percussion device for a needle-free syringe, and more specifically, to a percussion device for a syringe that can inject an injection into the skin of a person or animal without using a needle.

Recently, as the number of cases where pork is classified as 'abnormal meat' during processing due to injection traces from foot-and-mouth disease vaccination has increased, anxiety over the safety of livestock products is also growing.

Conventional vaccination uses a needle syringe, leaving traces, and in severe cases, side effects such as damage to the muscles at the vaccination site (purulence, tissue lesions), and foreign matter residue (on needles) caused by needle breakage accidents during vaccination, resulting in significant damage to farmers. didn't

Most parts classified as 'abnormal meat' are removed during the processing process, but if they are not discovered, they can cause discomfort to consumers.

Such ‘abnormal meat’ can lead to consumer distrust in the quality of domestically produced meat.

Accordingly, farmers are attracting attention by introducing intradermal needle-free injections that can minimize the possibility of injection traces remaining.

Intradermal needle-free injection is an injection that inserts the vaccine into the skin rather than the muscle.

Intradermal injection is the administration of drugs into the dermis below the epidermis. Since many immune cells are distributed in the dermis, strong immunity can be induced even with a smaller amount of injection than that used for intramuscular (subcutaneous) inoculation.

Republic of Korea Patent No. 10-1966547 'Animal Syringe' is a device that both marks and injects the chemical solution by simply piercing the animal's skin with a syringe needle. Multiple syringe needles are installed to continuously perform the injection through the use of selective syringe needles. Disclosed is a syringe for animals that can be used multiple times without replacing the syringe needle because it allows injection of a chemical solution.

However, Republic of Korea Patent No. 10-1966547 ‘Animal Syringe’ has a problem in that it poses a risk of disease transmission between animals because the needle is used without replacement.

The purpose of the present invention is to provide a percussion device used in a needle-free syringe that can continuously perform intradermal injections by automatically injecting injection liquid without using a needle. This device protects the cylinder and nozzle portion of the needle-free syringe and protects the skin of animals. The present invention provides a percussion device for a needle-free syringe that can perform inoculation by providing a firing signal to the control unit while exposing the nozzle portion only when contacted with a predetermined pressure.

The above purpose is to: a percussion guide that retreats when in contact with an object; A percussion nut whose front end is coupled to the percussion guide and whose rear end is coupled with a gap to the case of the needle-free syringe; A percussion spring disposed between the percussion nut and the case; A sensor pin coupled to the case so that the front end is coupled to the percussion guide and retracts together when the percussion guide retracts; And this can be achieved by a trigger device for a needle-free syringe that is coupled to the case and includes a trigger sensor that provides a firing signal to the control unit of the needle-free syringe when detecting the retraction of the sensor pin.

In addition, for the above purpose, the percussion guide includes: a cylindrical guide body surrounding a cylinder to which the nozzle of a needle-free syringe is coupled; A contact portion formed at the front end of the guide body and forming an entrance so that the nozzle is exposed when the guide body retreats; And it can be achieved by a percussion device for a needle-free syringe including a connection part formed at the lower end of the guide body and coupled to the front end of the sensor pin.

In addition, the above object can be achieved by a percussion device for a needleless syringe in which a plurality of contact grooves are formed at the corners where the guide body and the contact portion meet the percussion guide.

Additionally, the above object can be achieved by a percussion device for a needleless syringe in which a cut groove is formed at the top of the guide body so that the cylinder can be exposed upward.

In addition, the above object can be achieved by a percussion device for a needleless syringe in which a plurality of observation holes are formed in the guide body so that the cylinder located inside can be viewed.

Additionally, the above object can be achieved by a percussion device for a needleless syringe in which the guide body is formed with one or more locking protrusions that limit the length to which the percussion nut is coupled.

In addition, the above object can be achieved by a percussion device for a needleless syringe in which the sensor pin is formed into a front stopper and a rear stopper, and the front stopper and the rear stopper are coupled to the case and limit the range of movement of the sensor pin.

In addition, for the above purpose, the needle-free syringe includes a case provided with an operation button; Battery removable from case; A driving motor coupled inside the case and operated by power from the battery; The front end is coupled to a piston, the rear end is coupled to a drive motor, and a pressure accumulator that provides the pressure necessary for injection of the injection through the operation of the drive motor; A cylinder whose rear end is coupled to the pressure accumulator; An injection liquid supply unit coupled to the upper part of the cylinder to supply injection liquid; a nozzle portion coupled to the front end of the cylinder; A control unit coupled to the case and electrically connected to the drive motor and the battery to operate the drive motor; And it can be achieved by a trigger device for a needleless syringe, which is coupled to the front end of the case and includes a trigger device that provides a firing signal to the control unit when it comes into contact with an object.

In addition, the above object can be achieved by a percussion device for a needleless syringe in which the control unit moves the piston backwards and then fixes it when the user presses the operation button, and the cylinder supplies the injection liquid to the injection liquid chamber when the piston moves backwards.

In addition, the above purpose is to provide a needle-free syringe in which the control unit releases the fixation of the piston when the percussion device provides a firing signal, the piston rapidly advances to the injection liquid chamber and pressurizes the injection liquid, and the injection liquid is injected into the object through the micro hole of the nozzle part. This can be achieved by using a percussion device.

According to the percussion device for a needleless syringe according to the present invention, the cylinder and nozzle part of the needleless syringe can be protected and a firing signal can be provided to the control unit while exposing the nozzle part only when it contacts the animal's skin with a predetermined pressure.

According to the percussion device for a needle-free syringe according to the present invention, intradermal injection can be performed continuously by automatically injecting the injection solution without using a needle, thereby reducing lesions caused by needle injection and reducing economic losses for farmers. there is.

In addition, according to the percussion device for needle-free syringes according to the present invention, it is possible to prevent risks caused by the use of syringe needles.

In addition, according to the percussion device for needle-free syringes according to the present invention, it is possible to prevent diseases from being transmitted between animals due to reuse of syringe needles.

In addition, according to the percussion device for a needleless syringe according to the present invention, injection liquid can be continuously injected into an animal.

In addition, according to the percussion device for a needleless syringe according to the present invention, work efficiency can be improved by semi-automating inoculation of animals.

In addition, according to the percussion device for a needleless syringe according to the present invention, stress on animals due to inoculation can be reduced, so increased production and improved meat quality can be expected.

In addition, according to the percussion device for a needle-free syringe according to the present invention, it is possible to easily inoculate a moving animal by securing a large contact surface on the skin of the animal in contact with the needle-free syringe.

In addition, according to the percussion device for a needle-free syringe according to the present invention, it is possible to perform vaccination by recognizing whether the needle-free syringe is properly grounded on the animal's skin without visual inspection.

In addition, according to the percussion device for a needle-free syringe according to the present invention, an inoculation method such as intradermal injection, subcutaneous injection, or intramuscular injection can be selected by adjusting the pressure at which the injection solution is injected.

Figure 1 is a perspective view of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 2 is an exploded perspective view of a portion of the front of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 3 is a side view of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 4 is a side view of the case of a needle-free syringe equipped with a percussion device for a needle-less syringe according to the present invention opened.
Figure 5 is a side view of the inside of the front case of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 6 is a side view and a partially enlarged view of the pressure accumulator of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 7 is a side view and a partially enlarged view showing that the main spring is compressed as the moving frame moves backwards in the pressure accumulator part of the needleless syringe equipped with the percussion device for the needleless syringe according to the present invention.
Figure 8 is a side view and a partially enlarged view showing that the moving frame is returned to its original position after the main spring of the pressure accumulator of the needleless syringe equipped with the percussion device for the needleless syringe according to the present invention is compressed.
Figure 9 is an exploded perspective view of the front portion of the piston of the pressure accumulator of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 10 is a cross-sectional view of a cylinder of a needle-less syringe equipped with a percussion device for a needle-less syringe according to the present invention.
Figure 11 is a rear perspective view of the cylinder of a needle-free syringe equipped with a percussion device for a needle-less syringe according to the present invention.
Figure 12 is an exploded perspective view showing a check valve disassembled from the cylinder of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 13 is an exploded perspective view of the check valve of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 14 is a cross-sectional view of the check valve of a needle-less syringe equipped with a percussion device for a needle-less syringe according to the present invention.
Figure 15 is a cross-sectional view of the support portion of the injection liquid supply part of a needle-free syringe equipped with a percussion device for a needle-less syringe according to the present invention.
Figure 16 is an exploded cross-sectional view of the nozzle portion of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 17 is an exploded perspective view of the injection liquid supply part of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 18 is a perspective view of a percussion guide for a needle-less syringe equipped with a percussion device for a needle-less syringe according to the present invention.
Figure 19 is a perspective view of the percussion nut of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 20 is an exploded perspective view of the percussion nut of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 21 is a cross-sectional view and partially enlarged view of the nozzle part, cylinder, and injection liquid supply part of a needleless syringe equipped with a percussion device for a needleless syringe according to the present invention.
Figure 22 shows a case where the piston moves backward in Figure 21.
Figure 23 shows a case where the piston moves forward in Figure 21.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, in describing the present invention, descriptions of already known functions or configurations will be omitted to make the gist of the present invention clear.

The X, Y, and Z axes shown in the drawing are arbitrarily determined for the convenience of explanation and not for the purpose of limiting rights. The and the Z-axis is defined as indicating the upward and downward directions.

Each direction described below is based on this, except where otherwise specifically limited.

In the description and claims of the invention, directions such as up (up), down (bottom), left and right (lateral or lateral), anterior (forward, front), posterior (belly, rear), etc. are not intended to limit rights. For convenience of explanation, the relative positions between drawings and structures are set as a standard, and each direction described below is based on this, except where otherwise specifically limited.

Referring to Figures 1 to 3 and 18,

The percussion device 900 for a needle-free syringe according to a preferred embodiment of the present invention is,

A percussion guide (910) that retreats when in contact with an object;

A percussion nut 940 whose front end is coupled to the percussion guide 910 and whose rear end is coupled with a gap to the case 100 of the needle-free syringe 10;

A percussion spring 960 disposed between the percussion nut 940 and the case 100;

A sensor pin (920) whose front end is coupled to the percussion guide (910) and coupled to the case (100) so as to retract together when the percussion guide (910) retracts; and

It is coupled to the case 100 and includes a trigger sensor 930 that provides a firing signal to the control unit 800 of the needle-free syringe 10 when the retraction of the sensor pin 920 is detected.

Referring to Figures 1 to 3,

The needle-free syringe (10),

Case 100 provided with an operation button 112;

A battery 200 detachable from the case 100;

A driving motor 300 coupled to the inside of the case 100 and operated by power from the battery 200;

A piston 460 is coupled to the front end and a rear end is coupled to the drive motor 300, and a pressure accumulator 400 that provides the pressure necessary to inject the injection solution 30 through the operation of the drive motor 300;

A cylinder 500 whose rear end is coupled to the pressure accumulator 400 and an injection chamber 511 capable of storing the injection fluid 30 is formed therein, and the piston 460 reciprocates in the injection fluid chamber 511;

An injection solution supply unit 600 coupled to the upper part of the cylinder 500 to supply the injection solution 30;

A nozzle unit 700 coupled to the front end of the cylinder 500;

A control unit 800 coupled to the case 100 and electrically connected to the driving motor 300 and the battery 200 to operate the driving motor 300; and

It is coupled to the front end of the case 100 and includes a trigger device 900 that provides a firing signal to the control unit 800 when it comes into contact with an object.

Referring to Figures 4 and 5, the case 100 provides a space where the battery 200, the drive motor 300, the pressure accumulator 400, and the control unit 800 are installed.

The case 100 may have a handle 111 formed at the bottom, and an operation button 112 electrically connected to the control unit 800 may be provided on the handle 111.

The operation button 112 is a switch that can supply or cut off power from the battery 200 to the control unit 800.

The handle 111 may have an insertion hole 116 formed at the bottom to allow installation of a removable battery 200, and may be coupled with a silicone pad 117 to prevent slipping.

In the case 100,

A front case in which a pressure accumulator 400 is disposed, a front installation hole 113 through which the pressure accumulator 400 protrudes is formed at the front end, and a handle 111 with an operation button 112 is formed at the bottom. (110); and

A drive motor 300 coupled to the pressure accumulator 400 is disposed therein, and may include a rear case 120 coupled to the rear end of the front case 110.

The case 100 can be divided into a front case 110 and a rear case 120.

The front case 110 and the rear case 120 can be separated into left and right sides, respectively.

The front case 110 provides a space where the pressure accumulator 400 is placed, and the rear case 120 provides a space where the drive motor 300 is placed.

The front installation hole 113 is a hole formed at the front end of the front case 110, and the front end of the pressure accumulator 400 disposed inside the front case 110 can be exposed to the outside of the front case 110. Provides space for

The front case 110 may be formed with a front installation groove 115 into which the rear end of the percussion device 900 is inserted.

The front installation groove 115 may be formed with a clearance groove 114 into which the percussion device 900 can be coupled.

The front case 110 may be formed with a pin hole 118 into which the sensor pin 920 of the percussion device 900 can be coupled.

The rear case 120 may be formed with a strap holder 121 capable of attaching a handle 111 strap or a shoulder strap.

The battery 200 provides power to operate the driving motor 300.

The power supplied from the battery 200 to the driving motor 300 is determined by the control unit 800.

The battery 200 can be separated from the handle 111 of the case 100, charged, and then mounted on the handle 111 again.

The battery 200 may be charged while being integrated into the case 100.

The driving motor 300 operates with power supplied from the battery 200 through the control unit 800.

The drive motor 300 provides power to drive the pressure accumulator 400.

The driving motor 300 may include a reducer and operates according to signals from the control unit 800.

Referring to FIGS. 6 to 9, the pressure accumulator 400 may change the pressure of the injection fluid chamber 511 inside the cylinder 500.

The pressure accumulator 400 may change the pressure of the injection fluid chamber 511 by reciprocating the piston 460 located in the injection fluid chamber 511 inside the cylinder 500.

The pressure accumulator 400 may change the pressure of the injection fluid chamber 511 to supply the injection fluid 30 from the injection fluid supply unit 600 to the injection fluid chamber 511 inside the cylinder 500.

The pressure accumulator 400 can spray the injection solution 30 stored in the injection solution chamber 511 to the outside of the cylinder 500 by changing the pressure of the injection room.

The pressure accumulator 400 operates with power provided from the drive motor 300.

The pressure accumulation unit 400,

A fixed frame 410 coupled to the drive motor 300 and providing a front space and a rear space;

A moving frame (420) coupled to the fixed frame (410) and moving linearly in the front space and the rear space at the same time;

A ball screw 430 coupled to the moving frame 420 located in the rear space and operated by the driving motor 300;

A locking device 440 coupled to the fixing frame 410 in the front space;

A shaft 450 capable of linear movement coupled to the fixed frame 410 and fixed by the locking device 440;

A piston 460 coupled to the front end of the shaft 450;

a support disk 470 coupled to the rear end of the shaft 450 in the front space;

It may include a main spring 480 disposed between the fixing device and the support disk 470 in the front space.

The fixed frame 410 is,

A rear fixed disk 413 coupled to the drive motor 300;

an intermediate fixed disk 412 spaced apart from the rear fixed disk 413 to form the rear space;

a front fixed disk 411 spaced apart from the middle fixed disk 412 to form the front space;

A plurality of rear supports 414 coupled between the rear fixed disk 413 and the intermediate fixed disk 412; and

It may include a plurality of front supports 415 coupled between the middle fixed disk 412 and the front fixed disk 411.

The fixed frame 410 can guide the linear movement of the movable frame 420 and the shaft 450.

The front space is formed between the front fixed disk 411 and the middle fixed disk 412, and the rear space is formed between the middle fixed disk 412 and the rear fixed disk 413.

The front support 415 supports the front space, and the rear support 414 supports the rear space.

The front fixing disk 411 may have a front extension 416 formed at the front and a rear extension 417 formed at the rear.

The front extension 416 is a pipe through which the shaft 450 passes, and has threads formed on the outer surface of the front end and is exposed to the outside of the case 100 through the front installation hole 113.

The rear extension 417 is a pipe through which the shaft 450 passes, and a locking device 440 may be coupled to the outside.

The moving frame 420 is,

A rear moving disk 422 coupled to the moving nut 432 of the ball screw 430 and moving linearly along the rear support 414;

A front moving disk 421 that moves linearly along the front support 415; and

It may include a plurality of movable supports 423 that penetrate the intermediate fixed disk 412 and are coupled between the rear movable disk 422 and the front movable disk 421.

The moving frame 420 is a frame that is coupled to the fixed frame 410 and moves along the front support 415 and the rear support 414.

The moving frame 420 can move forward or backward around the intermediate fixed disk 412.

The moving frame 420 is coupled to the ball screw 430 operated by the drive motor 300 and can move in a straight line.

When the moving frame 420 moves backward, it moves the support disk 470 backward together.

The ball screw 430 is a device used to change rotational motion into linear motion.

The ball screw 430 includes a screw shaft 431 coupled to the drive motor 300 and a moving nut 432 that moves along the screw shaft 431.

The front end of the screw shaft 431 is coupled to the intermediate fixing disk 412, and the rear end is coupled to the drive motor 300 and the coupling 310.

The movable nut 432 can be combined with the rear movable disk 422 to move the movable frame 420 in a straight line.

The locking device 440 is a device that can limit the movement of the shaft 450 using a ball 442.

The locking device 440 may be coupled to the rear extension portion 417.

The locking device 440 inserts the ball 442 into the locking groove 452 formed on the shaft 450 at the position where the support disk 470 moves backwards and compresses the main spring 480, thereby locking the shaft 450. Locking is possible.

When the moving frame 420 moves forward and pushes the locking device 440, the shaft 450 is unlocked.

When the shaft 450 is unlocked, the ball 442 inserted into the locking groove 452 comes out of the locking groove 452, so the shaft 450 is quickly moved by the restoring force of the compressed main spring 480. moves forward.

The locking device 440 is,

A ball guide 441 that is coupled to the inside of the cylindrical housing formed in the fixed frame 410, can be inserted into the shaft 450, can move in a straight line, and has a plurality of locking holes 446 formed therein;

a locking spring 448 disposed between the housing and the ball guide 441;

A plurality of balls 442 disposed in the locking hole 446;

A rocker 443 that is disposed between the housing and the ball guide 441 and moves by the elastic force of the locking spring 448 to insert the ball 442 into the locking groove 452 formed in the shaft 450; and

It may include an unlocker 444 that is disposed outside the housing and is coupled to the locker 443 through a guide hole 447 formed in the housing to move the locker 443.

The housing may be a front extension 416 and/or a rear extension 417 formed on the front fixing disk 411.

The housing has a rocker 443 located inside, a ball guide 441 is located inside the rocker 443, and a shaft 450 is located inside the ball guide 441.

An unlocker 444 is located on the outside of the housing.

The housing is formed with guide holes 447 in the front and rear directions.

The guide hole 447 provides a space where the locker 443 and the unlocker 444 can move together.

The ball guide 441 has a cylindrical shape through which the shaft 450 passes and is fixed inside the housing.

The ball guide 441 may be fixed to the housing by a fixing washer 449.

The fixing washer 449 may be coupled to the housing while contacting the front end and/or rear end of the ball guide 441.

The ball guide 441 is formed with a plurality of locking holes 446 so that the balls 442 can be inserted into the locking groove 452 of the shaft 450.

When the shaft 450 moves backwards and the locking hole 446 is connected to the locking groove 452, the ball 442 can move to the locking groove 452.

The locking spring 448 provides elastic force to move the rocker 443 backward.

The locking spring 448 is arranged to surround the outside of the ball guide 441.

The front end of the locking spring 448 is supported by a support jaw or fixing washer 449 formed inside the housing, and the rear end is supported by a rocker 443.

The ball 442 may be inserted into the locking groove 452 of the shaft 450 to limit the movement of the shaft 450.

The ball 442 is inserted into the locking groove 452 of the shaft 450 when the rocker 443 moves backward.

The ball 442 comes out of the locking groove 452 of the shaft 450 when the unlocker 444 advances.

The rocker 443 has a cylindrical shape fitted into the ball guide 441 and can move linearly along the ball guide 441.

The rocker 443 can insert the ball 442 into the locking groove 452 of the shaft 450 by the elastic force of the spring 448.

The locker 443 and the unlocker 444 are connected by a fixing bolt 445 and can move as one unit.

The fixing bolt 445 passes through the guide hole 447 formed in the housing and couples the locker 443 and the unlocker 444.

The rocker 443 may have a groove formed on its outer surface into which the fixing bolt 445 is coupled.

The rocker 443 may have a slide portion that protrudes inward and contacts the ball guide 441.

The front end surface of the slide part supports the locking spring 448, and the rear end surface may be inclined to press the ball 442 when the rocker 443 moves backwards.

When the shaft 450 moves backward and the locking hole 446 is connected to the locking groove 452, the rocker 443 moves backward by the elastic force of the locking spring 448 and places the ball 442 in the locking groove 452. Can be inserted.

When the ball 442 is inserted into the locking groove 452, the shaft 450 is locked.

The unlocker 444 has a cylindrical shape that is fitted into the housing and can move linearly along the housing.

The unlocker 444 may have a hole through which the fixing bolt 445 passes.

The fixing bolt 445 may be screwed to the locker 443 and/or the unlocker 444.

The unlocker 444 can advance the backward rocker 443 by the elastic force of the locking spring 448.

When the unlocker 444 moves forward by the moving frame 420, the locker 443 moves forward together.

When the rocker 443 moves forward by the unlocker 444, the ball 442 inserted into the locking groove 452 of the shaft 450 is separated from the locking groove 452.

When the ball 442 leaves the locking groove 452, the locked state of the shaft 450 is released.

The shaft 450 moves forward rapidly due to the elastic force of the compressed main spring 480.

The shaft 450 is used to move the piston 460 in a straight line.

The shaft 450 has a piston 460 coupled to the front end and a support disk 470 coupled to the rear end.

The shaft 450 may have a locking groove formed so that it can be locked by the ball of the locking device 440.

The shaft 450 may be formed with an insertion groove 451 into which the rear end of the piston 460 is coupled.

The piston 460 moves linearly in the injection chamber 511 of the cylinder 500.

The piston 460 may have a sealing jaw 462 formed so as to be in close contact with the injection chamber 511.

The piston 460 may have an annular groove 463 formed so that an O-ring 464 that can be in close contact with the injection chamber 511 can be coupled thereto.

The sealing jaw 462 and the O-ring can prevent the injection solution 30 from leaking.

The piston 460 may have an insertion screw 461 formed at its rear end, and the insertion screw 461 is screwed into the insertion groove 451.

The support disk 470 supports the main spring 480 together with the intermediate fixing disk 412.

The support disk 470 can compress the main spring 480 by moving backward together when the front moving disk 421 moves backward.

The support disk 470 does not move forward together with the front moving disk 421.

The main spring 480 provides energy that allows the injection solution 30 to be sprayed at high pressure.

The main spring 480 is disposed between the support disk 470 and the intermediate fixed disk 412.

The pressure accumulation unit 400,

When the moving frame 420 moves backward, the support disk 470 moves backward together and the main spring 480 is compressed,

The shaft 450 is fixed by the locking device 440 while the main spring 480 is compressed,

The moving frame 420 can return to its original position.

When the support disk 470 moves backward, the shaft 450 and the piston 460 also move backward, and at this time, the injection fluid 30 is injected into the injection fluid chamber 511.

Referring to Figures 10 to 12,

The cylinder 500,

It is a pipe in which a nozzle part 700 is coupled to the front end, the rear end is coupled to the needle-free syringe 10, and an injection liquid chamber 511 is formed inside, and a piston 460 reciprocates in the injection liquid chamber 511. (510);

It is formed above the horizontal body 510, so that a first chamber 531 is formed at the top, and a first flow path 532 connecting the injection fluid chamber 511 and the first chamber 531 is formed at the bottom, and injection fluid ( A vertical body 530 to which the injection solution supply unit 600 that supplies 30) is coupled; and

It includes a first check valve 540 coupled to the first chamber 531,

The first check valve 540 opens so that the injection liquid 30 is supplied from the injection liquid supply unit 600 to the injection liquid chamber 511 when the piston 460 retreats.

The horizontal body 510 is,

A front mounting portion 512 to which the nozzle portion 700 is coupled is formed at the front end,

A rear mounting portion 516 to which the needle-free syringe 10 is coupled is formed at the rear end.

The horizontal body 510 is a horizontal pipe, and an injection fluid chamber 511 in which the injection fluid 30 is stored is formed.

The horizontal body 510 has a front mounting portion 512 formed at the front end and a rear mounting portion 516 formed at the rear end.

The horizontal body 510 has a nozzle unit 700 coupled to the front end, and a pressure accumulator 400 is coupled to the rear end.

The front mounting portion 512 has a front flange 513 formed at the front end of the horizontal body 510,

The front flange 513 has a first mounting groove 514 formed on the front and a thread 515 to which the nozzle nut 750 is coupled is formed on the outer surface.

The front flange 513 is formed by extending outward from the front end of the horizontal body 510.

The first mounting groove 514 is a part where the nozzle body 710 and the washer 720 are seated, and the nozzle body 710 and the washer 720 are connected to the thread 515 by a nozzle nut 750. is bound by

The rear mounting portion 516 includes an extension tube 517 through which the shaft 450 of the needleless syringe 10 to which the piston 460 is coupled reciprocates; And a rear flange 518 formed at the rear end of the expansion tube 517 and fixed to the needleless syringe 10 at a cylinder nut 560,

The rear flange 518 has a rotation prevention groove 519 formed on the rear side, and a second mounting groove 520 into which the O-ring 522 is coupled is formed on the rear inner side.

The expansion pipe 517 provides space for the shaft 450 to move.

The rear flange 518 is formed by extending outward from the rear end of the horizontal body 510.

The rear flange 518 is restrained by a cylinder nut 560 to the front extension 416 formed on the fixing frame 410 of the pressure accumulator 400.

The rear flange 518 may have a fifth mounting groove 521 formed around the rear end.

The fifth mounting groove 521 allows the rear end of the rear flange 518 to be inserted into the front extension portion 416.

The rear flange 518 may have a rotation prevention groove 519 formed around the rear end.

The rotation prevention groove 519 prevents the cylinder 500 from rotating when the rear end of the rear flange 518 is inserted into the front extension portion 416.

The front extension 416 has a rotation prevention bump 418 engaged with the rotation prevention groove 519 on the inside of the front end, and a screw thread 419 to which the cylinder nut 560 is coupled is formed on the outside of the front end. .

The vertical body 530 is,

A third mounting groove 533 is formed on the inner surface of the upper part into which the injection solution supply unit 600 is inserted,

A thread 534 to which a fixing nut 616 is coupled is formed on the outer surface of the upper end to restrain the injection solution supply unit 600.

The vertical body 530 is a vertical pipe, and a first flow path 532 connected to the injection chamber 511 is formed at the bottom, and a first chamber 531 connected to the first flow path 532 is formed. formed at the top.

The vertical body 530 may be formed with a fourth mounting groove 535 for installing the first check valve 540 on the bottom 542 of the first chamber 531.

The third mounting groove 533 is formed by expanding the upper end of the first chamber 531 outward.

The insertion bundle 612 at the bottom of the injection solution supply unit 600 inserted into the third mounting groove 533 is restrained by a fixing nut 616.

Referring to Figures 15 and 17,

The injection solution supply unit 600,

A support portion 610 coupled to the upper portion of the cylinder 500 and having a second flow path 624 formed therein;

A spike 630 coupled to the upper part of the support 610 and having a third flow path 632 formed therein;

A fixing part 640 coupled to the support part 610 and restraining the spike 630; and

It includes a protective cup 650 that is coupled to the fixing part 640 and surrounds the vial 20 into which the spike 630 is inserted.

The support portion 610 is,

An insertion bundle 612 inserted into the third mounting groove 533 of the cylinder 500;

A first support pipe (611) extending upward from the insertion bundle (612);

a second support pipe (617) bent at a predetermined angle from the first support pipe (611) and extending upward; and

It includes a stand 618 coupled to the second support pipe 617 to support the spike 630.

The insertion bundle 612 is used to stably couple the support part 610 to the cylinder 500, and an annular groove 613 is formed on the outside so that the O-ring 615 can be coupled thereto.

Since the second support pipe 617 is inclined at a predetermined angle from the first support pipe 611, the stand 618 coupled to the second support pipe 617 is also inclined at a predetermined angle.

The internal passage leading to the first support pipe 611 and the second support pipe 617 forms a third flow passage 632.

The second support pipe 617 on the pedestal 618 forms a fitting portion 620 that is inserted into the lower end of the spike 630.

The fitting portion 620 is formed with an annular groove 621 so that the O-ring 622 can be coupled thereto.

The fitting portion 620 may be coupled to a support ring 623 in contact with the lower end of the spike 630.

The support ring 623 is an O-ring that seals the bottom of the spike 630.

The pedestal 618 supports the spike 630, and a thread 619 to which the fixing part 640 is coupled is formed on the side.

The spike 630 supplies the injection solution 30 to the second passage 624 through the third passage 632 formed in the introduction needle 631 inserted into the vial 20.

The spike 630 may be restrained on the pedestal 618 by the fixing part 640.

The fixing part 640 has a lower first fixture 641 coupled to the base 618 to fix the spike 630, and a through hole 643 formed in the center of the first fixture 641. Through this, the introduction needle 631 of the spike 630 is exposed upward.

The fixing part 640 may have a ball plunger 645 coupled to the second fixing body 642 at the top.

The ball plunger 645 can press and secure the stopper of the vial 20 inserted into the spike 630.

The second fixture 642 may have a bending groove 644 formed on its outer surface into which the protection cup 650 is coupled.

The protective cup 650 may have an open bottom and a fitting protrusion 651 coupled to the bending groove 644 may be formed on the inside of the lower end.

The protective cup 650 is used to protect the circumference of the vial 20 and may have a cutout through which the vial 20 can be observed.

Referring to Figures 12 and 16,

The nozzle unit 700,

A nozzle body 710 in which a second chamber 711 is formed and a spray hole 712 is formed at the front end;

A second check valve 730 coupled to the second chamber 711;

A washer 720 coupled to the inside of the rear end of the nozzle body 710 and forming a fourth flow path 721 connecting the first chamber 531 and the second chamber 711; and

It includes a nozzle nut 750 that is coupled to the front end of the horizontal body 510 and secures the nozzle body 710 to the front end of the horizontal body 510,

The second check valve 730 closes the fourth passage 721 to prevent external air from flowing into the injection chamber 511 through the fourth passage 721 when the piston 460 retreats.

The nozzle body 710 has a second check valve 730 installed in the second chamber 711 inside, and a washer 720 is coupled to the inside of the rear end.

The nozzle body 710 has an expansion portion 713 formed on the outside of the rear end, and the expansion portion 713 comes into contact with a bent portion 751 formed inward from the front end of the nozzle nut 750.

The nozzle body 710 may have a first expansion groove 714 formed inside the expansion portion 713 into which the washer 720 can be seated.

The nozzle body 710 may be formed with a second expansion groove 715 in which the O-ring 723 is mounted at the rear end of the first expansion groove 714.

The second check valve 730 opens and closes the fourth flow passage 721 of the washer 720 coupled to the rear end of the nozzle body 710.

The second check valve 730 opens the fourth flow path 721 so that the injection liquid 30 is supplied from the injection liquid supply unit 600 to the second chamber 711 when the piston 460 advances.

The second check valve 730 closes the fourth passage 721 when the piston 460 moves backward, so that external air introduced through the injection port 712 passes through the fourth passage 721 into the injection chamber 511. ) can be blocked from entering.

The washer 720 is coupled to the rear end of the nozzle body 710 to close the second chamber 711, but connects the second chamber 711 and the injection chamber 511 through the fourth flow passage 721.

The fourth flow path 721 of the washer 720 can be opened and closed by the second check valve 730 in contact with the front.

The washer 720 is seated in the first expansion groove 714, and an annular groove 722 is formed around the rear end so that the O-ring 723 can be coupled thereto.

The O-ring 723 is in close contact with the second expansion groove 715 and the annular groove 722.

The nozzle nut 750 is coupled to a thread 515 formed on the horizontal body 510 of the cylinder 500.

The nozzle nut 750 has a bent portion 751 formed on the inside of the front end portion to constrain the expanded portion 713 of the nozzle body 710.

Referring to Figures 21 to 23,

The control unit 800 controls the power supplied from the battery 200 to the driving motor 300.

The control unit 800 may include a control circuit, a display connected to the control circuit to display the status, and a button for inputting commands to the control circuit.

The control unit 800 moves the piston 460 backwards and then fixes it when the user presses the operation button 112, and the cylinder 500 injects the injection fluid 30 into the injection fluid chamber 511 when the piston 460 moves backwards. This is supplied.

When the piston 460 moves backward, the pressure in the injection fluid chamber 511 decreases, so the first check valve 540 opens and the injection fluid 30 is supplied to the injection fluid chamber 511.

The control unit 800 releases the fixation of the piston 460 when the trigger device 900 provides a firing signal, and the piston 460 rapidly advances to the injection liquid chamber 511 to release the injection liquid 30. is pressurized, and the injection liquid 30 is injected into the object through the nozzle unit 700.

When the piston 460 moves forward, the pressure in the injection fluid chamber 511 increases, so the second check valve 730 opens and the injection fluid 30 is injected through the nozzle portion 700.

Referring to Figure 18,

The trigger device 900 is,

A percussion guide (910) that retreats when in contact with an object;

A percussion nut (940) whose front end is coupled to the percussion guide (910) and whose rear end is coupled with a gap to the case (100) of the needle-free syringe;

A percussion spring disposed between the percussion nut 940 and the case 100;

A sensor pin 920 whose front end is coupled to the percussion guide 910 and coupled to the case 100 so as to retract together when the percussion guide 910 retracts; and

It is coupled to the case 100 and includes a trigger sensor 930 that provides a firing signal to the control unit 800 of the needle-free syringe when it detects the retraction of the sensor pin 920.

The percussion guide 910 is,

A cylindrical guide body (911) surrounding the cylinder (500) to which the nozzle of the needle-free syringe is coupled;

A contact portion 912 formed at the front end of the guide body 911 and having an entrance 914 so that the nozzle is exposed when the guide body 911 retracts; and

It is formed at the lower end of the guide body 911 and includes a connection portion 917 to which the front end of the sensor pin 920 is coupled.

The percussion guide 910 protects the nozzle from being exposed to the outside, and when it touches the skin of an animal, it retreats and the nozzle is exposed to the outside.

The percussion guide 910 is coupled to a percussion nut 940 at the rear end, and the percussion nut 940 is coupled to the case 100.

The guide body 911 may have a cut groove 915 formed at the top so that the cylinder 500 can be exposed upward.

The incision groove 915 is a portion where the vertical body 530 of the cylinder 500 coupled with the injection liquid supply unit 600 is exposed to the outside of the guide body 911.

The cut groove 915 is formed forward from the upper rear end of the guide body 911, and provides a space for the vertical body 530 of the cylinder 500 to move in the guide body 911.

The guide body 911 may be formed with a plurality of observation holes 916 so that the cylinder 500 located inside can be viewed.

The observation hole 916 provides a space to check the cylinder 500 surrounded by the guide body 911.

The guide body 911 may be formed with one or more locking protrusions 919 that limit the length to which the percussion nut 940 is coupled.

The guide body 911 has a thread 918 formed on the outside of the rear end to which the percussion nut 940 is coupled.

The locking protrusion 919 is a stopper that limits the length at which the percussion nut 940 coupled to the screw thread 918 is fastened to the guide body 911.

The locking protrusion 919 is preferably formed separately on the left and right sides.

The contact portion 912 is a portion that contacts the animal's skin, and an entrance 914 through which the nozzle can enter and exit is formed in the center.

The percussion guide 910 may have a plurality of contact grooves 913 formed at the corners where the guide body 911 and the contact portion 912 meet.

The contact groove 913 can secure a large contact area by inserting a portion of the skin into the contact groove 913 when the contact portion 912 contacts the skin of an animal.

The contact groove 913 can prevent the position where the contact portion 912 is in contact with the animal's skin from moving.

The connection portion 917 is formed at the lower end of the guide body 911 to connect the guide body 911 and the sensor pin 920.

The connection portion 917 may be coupled to the sensor pin 920 using a bolt and nut.

The connecting portions 917 may be formed as a pair so that they can be coupled from both sides around the sensor pin 920.

Referring to Figures 19 and 20,

The percussion nut 940 is,

A front nut (941) in which a flange is formed at the front end and a thread (943) is formed on the inner side; And a rear nut 944 having a rear nut flange 945 formed at the rear end and a thread 950 coupled to the thread 943 of the front nut 941 formed on the outer surface.

The front nut 941 is coupled to a thread 918 formed on the guide body 911 of the percussion guide 910, which provides a firing signal to the control unit 800 when it contacts an object.

The front nut 941 connects the guide body 911 and the rear nut 944.

The rear nut 944 is combined with the front nut 941 and is inserted into the front installation groove 115 of the case 100.

The rear nut 944 is formed with a plurality of locking protrusions 946 protruding outward on the outer surface of the rear nut flange 945.

In the case 100, the locking protrusion 946 is coupled to the front installation groove 115 to form a clearance groove 114 that can move in the forward and backward directions.

The locking protrusion 946 of the rear nut 944 is inserted into the clearance groove 114 and can move in the forward and backward directions.

The rear nut 944 is formed with a protruding step 947 on the inner surface.

The step 947 supports the percussion spring disposed between the rear nut 944 and the case 100.

The rear nut 944 may have a fitting groove 948 formed at the front end to be inserted into the rear end of the percussion guide 910.

The rear nut 944 may have an insertion protrusion 949 formed at the front end that is inserted into the cut groove 915 of the guide body 911.

The order in which the percussion guide 910 and the percussion nut 940 are combined is as follows.

① Combine the front nut (941) with the rear nut (944).

② Insert the insertion protrusion 949 of the rear nut 944 into the cut groove 915 of the percussion guide 910.

③ Fit the rear end of the percussion guide (910) into the fitting groove (948) of the rear nut (944).

④ Fasten the front nut (941) to the thread (918) of the percussion guide (910) up to the locking jaw (919).

The percussion spring is disposed between the step 947 of the rear nut 944 and the case 100.

The percussion spring provides elastic force so that the percussion guide 910 can return to its original position after retreating.

The sensor pin 920 allows the percussion sensor 930 to detect the retreat of the percussion guide 910.

The sensor pin 920 may be formed into a front stopper 922 and a rear stopper 923.

The front stopper 922 and the rear stopper 923 are coupled to the case 100 and limit the range of movement of the sensor pin 920.

The sensor pin 920 is coupled to the pinhole 118 of the case 100.

The sensor pin 920 has a front stopper 922 located outside the case 100 and a rear stopper 923 located inside the case 100.

The percussion sensor 930 detects the rear end of the sensor pin 920 that retreats together with the percussion guide 910.

Referring to Figures 12 to 14,

The first check valve 540,

It includes a bottom 542 on which a through hole 543 through which the injection liquid 30 passes is formed and an upper border 544 extending upward along the circumference of the bottom 542 and disposed at the outlet of the injection liquid 30. The first body 541;

A plurality of concentric irregularities 547 with expanding diameters are formed on the upper surface to open and close the inlet of the injection solution 30, and a lower border 548 extending downward along the circumference of the sheet 546. a second body 545 that includes and is disposed above the first body 541; and

It includes a check spring 550 disposed between the bottom 542 of the first body 541 and the seat 546 of the second body 545.

The first body 541 is disposed at the outlet where the injection liquid 30 is discharged and supports the lower end of the check spring 550.

The outlet is formed on the lower surface of the first chamber 531 of the cylinder 500.

The first body 541 may be placed in the fourth mounting groove 535 of the cylinder 500.

The fourth mounting groove 535 allows the first body 541 to maintain a constant position.

The first body 541 includes a bottom 542 that supports the lower end of the check spring 550 and an upper edge 544 that prevents the check spring 550 from being separated.

The first body 541 may further have a plurality of through holes 543 formed at the corners where the bottom 542 and the upper edge 544 meet.

The second body 545 is disposed at the inlet through which the injection liquid 30 is supplied and supports the upper end of the check spring 550.

The inlet is formed on the lower surface of the injection solution supply unit 600.

The second body 545 includes a seat 546 that supports the upper end of the check spring 550 and a lower border 548 that prevents the check spring 550 from being separated.

The unevenness 547 reduces the area in contact with the inlet through which the injection solution 30 is supplied, so that the second body 545 can descend more easily when the piston 460 moves backward.

Since the irregularities 547 are in the form of a plurality of concentric circles with expanding diameters, each irregularity 547 can block the inlet through which the injection liquid 30 is supplied.

The second body 545 may have a seating groove 549 formed on the lower surface of the seat 546 in which the upper end of the check spring 550 is installed.

The seating groove 549 maintains the upper end of the check spring 550 at a constant position.

The second body 545 has a plurality of vertical grooves 551 formed on the outer surface of the lower border 548.

The vertical groove 551 becomes a passage through which the injection liquid 30 passes when the second body 545 descends and the inlet through which the injection liquid 30 is supplied opens.

When the second body 545 is made of synthetic resin, opening and closing performance can be improved due to the elasticity of the material.

The second check valve 730 has the same configuration as the first check valve 540.

In the second check valve 730, the fourth flow path 721 of the washer 720 of the nozzle unit 700 becomes the inlet of the injection liquid 30, and the injection port 712 of the nozzle unit 700 serves as the injection liquid 30. becomes the exit of

The second check valve 730 is arranged in the order of the first body 731, the check spring 740, and the second body 735 in the front-back direction in the second chamber 711.

However, the first check valve 540 and the second check valve 730 may use check springs 550 and 740 with different elastic forces.

If the check spring 550 of the first check valve 540 has less elastic force than the check spring 740 of the second check valve 730, when the piston 460 moves backward, the second check valve 730 It is easily opened and the injection solution 30 can be supplied to the injection fluid chamber 511.

In addition, if the check spring 550 of the first check valve 540 has a smaller elastic force than the check spring 740 of the second check valve 730, when the piston 460 moves forward, the second check valve 730 ) is opened at a higher pressure, and the injection liquid 30 can be sprayed at a higher pressure.

The needle-free syringe 10 operates in the following sequence.

① Turn on the power of the control unit 800.

② Press and hold the operation button (112) on the handle (111).

③ The control unit 800 moves the moving frame 420 backwards to compress the main spring 480 and supplies the injection liquid 30 to the cylinder 500.

④ The locking device 440 locks the shaft 450 with the main spring 480 compressed.

⑤ The moving frame 420 moves forward and returns to its original position.

⑥ When the skin of the animal is pressed with the trigger device (900), the trigger signal is transmitted to the control unit (800).

⑦ The control unit 800 advances the moving frame 420 to unlock the locking device 440.

⑧ The piston 460 moves forward rapidly due to the elastic force of the main spring 480.

⑨ The injection liquid 30 of the cylinder 500 is injected through the nozzle unit 700.

The operation button 112 is a switch that notifies the control unit 800 that the user is performing a task.

Only when the operation button 112 is pressed, the processes ③ to ⑨ are automatically repeated.

Although specific embodiments of the present invention have been described and shown above, it is known in the art that the present invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. This is self-evident to those who have it.

Accordingly, such modifications or variations should not be understood individually from the technical idea or viewpoint of the present invention, and the modified embodiments should be regarded as falling within the scope of the claims of the present invention.

10: Needle-free syringe 20: Vial
30: Injection 100: Case
110: Front case 111: Handle
112: Operation button 113: Front installation hole
114: clearance groove 115: front installation groove
116: Insertion hole 117: Silicone pad
118: Pinhole 120: Rear case
121: Strap holder 200: Battery
300: Drive motor 310: Coupling
400: pressure accumulator 410: fixed frame
411: Front fixed disk 412: Middle fixed disk
413: Rear fixed disk 414: Rear support
415: front support 416: front extension
417: Rear extension 418: Rotation bump
419: thread 420: moving frame
421: Front moving disk 422: Rear moving disk
423: moving support 430: ball screw
431: screw shaft 432: moving nut
440: Locking device 441: Ball guide
442: ball 443: rocker
444: Unlocker 445: Fixing bolt
446: Locking hole 447: Guide hole
448: Locking spring 449: Fixing washer
450: Shaft 451: Insertion groove
452: Locking groove 460: Piston
461: Insert screw 462: Sealing jaw
463: Annular groove 464: O-ring
470: Support disk 480: Main spring
500: cylinder 510: horizontal body
511: Injection chamber 512: Front mounting portion
513: Front flange 514: First mounting groove
515: thread 516: rear mounting portion
517: Extension pipe 518: Rear flange
519: Anti-rotation groove 520: Second mounting groove
521: Fifth mounting groove 522: O-ring
530: vertical body 531: first chamber
532: 1st flow path 533: 3rd mounting groove
534: thread 535: fourth mounting groove
540; First check valve 541: First body
542: Bottom 543: Through hole
544: upper border 545: second body
546: Sheet 547: Irregularities
548: Lower border 549: Seating groove
550: check spring 551: vertical groove
560: Cylinder nut 600: Injection fluid supply unit
610: support 611: first support pipe
612: Insert bundle 613: Annular groove
615: O-ring 616: Fixing nut
617: second support pipe 618: pedestal
619: thread 620: insertion part
621: Annular groove 622: O-ring
623: Support ring 624: Second euro
630: Spike 631: Introduction needle
632: Third Euro 640: Fixed part
641: first fixture 642: second fixture
643: Through hole 644: Bent groove
645: Ball plunger 650: Protective cup
651: Fitting protrusion 700: Nozzle part
710: nozzle body 711: second chamber
712: Nozzle 713: Extension part
714: First expansion groove 715: Second expansion groove
720: Washer 721: Fourth Euro
722: Annular groove 723: O-ring
730: Second check valve 731: First body
735: second body 740: check spring
750: nozzle nut 751: bent part
800: Control unit 900: Percussion device
910: percussion guide 911: guide body
912: contact portion 913: contact groove
914: entrance 915: cut groove
916: observation hole 917: connection part
918: thread 919: locking jaw
920: Sensor pin 921: Fastening groove
922: Front stopper 923: Rear stopper
930: percussion sensor 940: percussion nut
941: Front nut 942: Front nut flange
943: thread 944: rear nut
945: Rear nut flange 946: Locking protrusion
947: Step 948: Fitting groove
949: Insertion protrusion 950: Screw thread
960: percussion spring

Claims (10)

A percussion guide that retracts when it comes in contact with an object;
A percussion nut whose front end is coupled to the percussion guide and whose rear end is coupled with a gap to the case of the needle-free syringe;
A percussion spring disposed between the percussion nut and the case;
A sensor pin coupled to the case so that the front end is coupled to the percussion guide and retracts together when the percussion guide retracts; and
A percussion device for a needle-free syringe, characterized in that it includes a percussion sensor that is coupled to the case and provides a firing signal to a control unit of the needle-less syringe when the retraction of the sensor pin is detected. According to paragraph 1,
The percussion guide is,
A cylindrical guide body surrounding the cylinder to which the nozzle of the needle-free syringe is coupled;
A contact portion formed at the front end of the guide body and forming an entrance so that the nozzle is exposed when the guide body retreats; and
A percussion device for a needle-free syringe, characterized in that it includes a connection part formed at the lower end of the guide body and coupled to the front end of the sensor pin. According to paragraph 2,
The percussion guide is a percussion device for a needle-free syringe, characterized in that a plurality of contact grooves are formed at the corners where the guide body and the contact portion meet. According to paragraph 3,
A percussion device for a needleless syringe, characterized in that the guide body has a cut groove formed at the top so that the cylinder can be exposed upward. According to paragraph 4,
A percussion device for a needleless syringe, characterized in that the guide body is formed with a plurality of observation holes to view the cylinder located inside. According to clause 5,
A percussion device for a needle-free syringe, characterized in that the guide body is formed with one or more locking protrusions that limit the length to which the percussion nut is coupled. According to paragraph 1,
The sensor pin is formed into a front stopper and a rear stopper,
The front stopper and the rear stopper are coupled to the case to limit the range of movement of the sensor pin. According to any one of claims 1 to 7,
The needle-free syringe,
A case provided with an operation button;
a battery detachable from the case;
a driving motor coupled inside the case and operated by power from the battery;
A piston is coupled to the front end and a rear end is coupled to the drive motor, and a pressure accumulator that provides the pressure necessary for injection of the injection through the operation of the drive motor;
A cylinder whose rear end is coupled to the pressure accumulator, wherein an injection chamber capable of storing injection fluid is formed, and wherein the piston reciprocates in the injection fluid chamber;
An injection liquid supply unit coupled to the upper part of the cylinder to supply injection liquid;
a nozzle portion coupled to the front end of the cylinder;
a control unit coupled to the case and electrically connected to the driving motor and the battery to operate the driving motor; and
A trigger device for a needleless syringe, characterized in that it includes a trigger device that is coupled to the front end of the case and provides a firing signal to the control unit when it comes into contact with an object. According to clause 8,
The control unit moves the piston backwards and then fixes it when the user presses the operation button,
The cylinder is a percussion device for a needleless syringe, characterized in that the injection liquid is supplied to the injection liquid chamber when the piston moves backwards. According to clause 9,
The control unit releases the fixation of the piston when the percussion device provides a firing signal,
The piston rapidly advances into the injection solution chamber and pressurizes the injection solution,
A percussion device for a needleless syringe, characterized in that the injection liquid is injected into the object through the nozzle portion.

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