KR20190126520A - Constant velocity infusion device for painless syringe and painless sylinge having the same - Google Patents

Abstract

The present invention relates to a liquid chemical injection control device for a painless syringe which, during injection of an injection liquid with a painless syringe, controls a movement of a piston rod, thereby significantly reducing generating noises, reducing scars, and alleviating pain, and enables effective injection to a hypodermic tissue, thereby enabling rapid internal resorption; and a painless syringe comprising the same. According to the present invention, the liquid chemical injection control device is formed at one side of a rod member in the painless syringe including the rod member moving to move a syringe rod forming an injection unit with a hydraulic pressure or a resilience of an elastic member. The chemical injection control device comprises: a plurality of stopper grooves formed on external sides of the rod member to have intervals in a longitudinal direction; a mounting hole formed on a body, at which the rod member is movably placed, in an orthogonal direction to the moving direction of the rod member; a stopper provided to be movable at the mounting hole and in contact with the rod member; a cover cap coupled to cover the mounting hole; and the elastic member placed between the stopper and the cover cap and elastically supporting the stopper toward a side of the rod member.

Description

Chemical injection control device for painless syringes and painless syringes having the same {CONSTANT VELOCITY INFUSION DEVICE FOR PAINLESS SYRINGE AND PAINLESS SYLINGE HAVING THE SAME}

The present invention relates to a liquid injection control device for a painless syringe and a painless syringe having the same, and more particularly, to control the movement of the piston rod during injection of the injection liquid using a painless syringe, thereby significantly reducing noise and reducing scarring and pain. The present invention relates to a liquid injection control device for a painless syringe and a painless syringe having the same, which can alleviate and enable faster absorption into the body by effective injection into subcutaneous tissue.

In general, a syringe is considered a tool that nurses and doctors use to inject medicine directly into the patient's body.

1 is a block diagram showing a general syringe. Conventional syringes have one needle (1) as shown in FIG. 1 and press the piston (2) to inject the medicine in the cylinder (3) to the patient.

However, users who need to be injected several times a day, such as diabetics, have to be injected frequently during medical treatment at home, not in the hospital. At this time, a general syringe (syringe made of needles and push rods) Not only do you have to use injections, but you also have to give yourself a shot.

In addition, even in the case of a general patient, if a patient wants to inject themselves or injects a child with a severe movement, there is also a considerable difficulty in injecting the drug without having an excellent injection technique. There is a problem that does not solve.

On the other hand, in order to solve such a problem, a syringe which inserts a general syringe into a sleeve so that instant injection by elasticity or air pressure of a spring is performed, or a thin hole (about 0.1 mm diameter) instead of the injection needle is inserted into the syringe tip. A painless syringe has been proposed which is capable of providing and injecting the injection liquid into the skin by applying pressure from the back of the syringe.

However, such a conventional painless syringe is, for example, in the case of a painless syringe striking a piston in a spring-loaded manner, at the time of compressing loading of a spring to make a momentary impact, a very large force for compressing the spring is required. jig) should be used, which is very cumbersome and time consuming in use because the compression jig must be used after the loading jig is combined and separated after each load.

In addition, the conventional spring-loaded painless syringe has a problem that can not be applied to the injection of a few injections, such as skin cosmetics in a way that injection liquid is injected at a time, once hitting a bunch of blows, spring The blow sound that occurs during the blow is greatly generated, giving discomfort to the subject, and particularly in the case of animals such as young birds, which are very sensitive to sound, they die due to the blow sound.

On the other hand, in another example of a conventional painless syringe, a painless syringe that moves and injects a piston in a fluid (for example, air) extrusion method does not have sufficient extruding force to push out the piston, and extrudes compressed gas in the extrusion path. Loud hitting sound occurs, causing problems such as discomfort.

In addition, the painless syringe of the conventional fluid extrusion method is injected at a rapid speed, so that the injection solution may not be sufficiently injected into the subcutaneous tissue, and some may pop out, and a scar may remain on the injection surface after injection. Although it is a syringe, there is a problem that can cause relatively pain.

(Document 1) Republic of Korea Patent Publication No. 10-0777146 (announced on November 19, 2007) (Document 2) Korean Utility Model Publication No. 20-1994-0006930 (Document 3) Korean Utility Model Publication No. 20-1997-0001378 (August 4, 1997) (Document 4) Republic of Korea Patent Publication No. 10-2001-0067582 (Published July 13, 2001)

Therefore, the present invention for solving the above-mentioned conventional problems, by controlling the movement of the piston rod during injection of the injection liquid using a painless syringe to significantly reduce the noise generated, to leave no scars, to further reduce the pain The purpose of the present invention is to provide a liquid injection control device for a painless syringe and a painless syringe having the same.

It is another object of the present invention to provide a liquid injection control device for a painless syringe and a painless syringe having the same, so that the absorption into the body can be made faster by effective injection of the subcutaneous tissue into the body.

In addition, the present invention is another object to provide a painless syringe that is easy to use, and can be used in a variety of fields such as medical care of humans and animals, as well as skin cosmetics, which can improve the utility.

The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to a first aspect of the present invention for achieving the above objects and other features, a painless syringe having a rod member that is moved to move the syringe rod constituting the injection unit by the elastic force of the hydraulic or elastic member A chemical liquid injection control device for a painless syringe is configured on one side of the rod member, the plurality of stopper grooves formed on the outer edge of the rod member with a distance in the longitudinal direction; A mounting hole formed in a body in which the rod member is movable in a direction orthogonal to a moving direction of the rod member; A stopper movably provided in the mounting hole and in contact with the rod member; A cover cap coupled to cover the mounting hole; And an elastic member provided between the stopper and the cover cap to elastically support the stopper toward the rod member side.

According to a second aspect of the present invention, there is provided a chemical liquid injection control device for a painless syringe configured on a path through which gas is discharged from a painless syringe having a rod member moved by gas pressure to move a syringe rod of a syringe. A cylindrical body having a communication path connected in communication with the discharge side and formed at a central portion thereof, the cylindrical body being closed at one surface thereof; A cylindrical rotating member rotatably provided at an outer periphery of the cylindrical body and driven to rotate in response to a linear movement of the rod member; And flow passage opening and closing means formed between the cylindrical body and the rotating member and configured to allow and close the gas discharge through the cylindrical body and the rotating member according to the movement of the rod member. An inlet hole formed at one side of the body, a first communication hole formed to communicate with the communication path at the other side of the cylindrical body, and a plurality of second communication holes formed at intervals in the circumferential direction on the outer edge of the rotating member; Including, when the first communication hole and the second communication hole is communicated is provided with a chemical injection control device for a painless syringe to discharge the exhaust gas flowing through the inlet hole to the outside through the second communication hole.

According to a third aspect of the present invention, there is provided a chemical liquid injection control apparatus for a painless syringe configured on a path through which gas is discharged from a painless syringe having a rod member moved by gas pressure to move a syringe rod of a syringe. An inlet housing; A movable body provided to be slidably movable in the housing; An elastic member provided in the housing to elastically support the movable body; And hydraulic fluid flow control means formed between the housing and the mobile body to control a flow in which the hydraulic fluid flowing in accordance with the movement of the mobile body is communicated to the outside. Including the first communication hole and a plurality of second communication holes formed in the housing, the hydraulic fluid flowing into the housing by communicating the first communication hole and the second communication hole by the movement of the movable body is the second communication hole. Provided with a liquid injection control device for a painless syringe to be discharged to the outside through.

According to a fourth aspect of the present invention, there is provided a painless syringe including a liquid injection control device for a painless syringe according to any one of the first to third aspects described above.

In a fourth aspect of the invention, the painless syringe comprises: a valve body having an interior space; A liquefied gas container connected to an internal space of the valve body in an open state, the liquefied gas container coupled to the extruded vaporized gas into the valve body; A valve body penetrating through a central portion provided to slidably move the inner space of the valve body in an airtight manner; An operation unit configured on one side of the valve body and slidingly moving the valve body in a front-rear operation; A cylinder body coupled to one side of the valve body, the cylinder body having an internal space and detachably coupled to an injection liquid unit having a syringe rod; A piston rod body as the rod member slidably provided in an inner space of the cylinder body; An inflow communication path communicating one side of the inner space of the valve body with one end of the inner space of the cylinder body; A discharge communication path communicating between the other side of the inner space of the valve body and the other end side of the inner space of the cylinder body; At least one outer communication passage formed at an outer edge of the valve member and in communication with and closed with the discharge communication passage according to the forward and backward movement of the valve member; A discharge path formed in the valve body in communication with an external and the external communication path; And a chemical injection control device for a painless syringe provided in association with the discharge path.

In the fourth aspect of the present invention, the valve member is coupled to a cylindrical body portion, a plurality of extension flange portions extending outwardly from both ends and a central portion of the cylindrical body, respectively, and the end face of the extension flange portion to the valve. A sliding sealing member that provides airtightness while sliding in contact with the inner surface of the body, the cylinder body is a guide that is formed in the inner space on one side, in communication with the inner space on the other side and guides the piston rod of the piston member hermetically It is formed in a cylindrical shape formed with a hole, the other end is formed with a coupling portion detachably coupled with the coupling portion of the rod protective cap constituting the injection unit, the piston member is sliding along the inner surface of the guide hole of the cylinder body A moving piston rod and one end of the piston rod and The piston head in contact with the inner surface of the body, and may be provided on the outer edge of the piston head and a sliding sealing member for providing airtightness while sliding contact with the inner surface of the cylinder body.

In the fourth aspect of the present invention, it is preferable to further include a cushion member provided at the edges of the front and rear of the piston head.

According to a fifth aspect of the present invention, there is provided a gas turbine comprising: a valve body having an inner space; A liquefied gas container connected to an internal space of the valve body in an open state, the liquefied gas container coupled to the extruded vaporized gas into the valve body; A valve body penetrating through a central portion provided to slidably move the inner space of the valve body in an airtight manner; An operation unit configured on one side of the valve body and slidingly moving the valve body in a front-rear operation; A cylinder body coupled to one side of the valve body, the cylinder body having an internal space and detachably coupled to an injection liquid unit having a syringe rod; A piston rod body as the rod member slidably provided in an inner space of the cylinder body; An inflow communication path communicating one side of the inner space of the valve body with one end of the inner space of the cylinder body; A discharge communication path communicating between the other side of the inner space of the valve body and the other end side of the inner space of the cylinder body; At least one outer communication passage formed at an outer edge of the valve member and in communication with and closed with the discharge communication passage according to the forward and backward movement of the valve member; A discharge path formed in the valve body in communication with an external and the external communication path; And a chemical liquid injection control means provided at one side of the cylinder body to control a moving speed of the piston member.

According to a fifth aspect of the present invention, the chemical liquid injection control means includes a plurality of stopper grooves formed on the outer edge with a distance in the longitudinal direction of the piston rod; A mounting hole formed in a direction orthogonal to the guide hole at one side of the guide hole of the cylinder body; A spherical stopper provided to be linearly movable in the mounting hole on the inner wall side of the guide hole; A cover cap coupled to cover the mounting hole; And an elastic member provided between the spherical stopper and the cover cap to elastically support the spherical stopper.

According to a fifth aspect of the present invention, the chemical liquid injection control means includes a closed cylindrical body having a communication path connected in communication with the side to which the extruded vaporization gas is discharged; A cylindrical rotating member rotatably in close contact with the outer edge of the cylindrical body; An inlet hole formed on one side of the cylindrical body such that the extruded vaporized gas discharged from the valve body flows into the communication path side of the cylindrical body; A first communication hole formed on the other side of the cylindrical body so as to communicate with the communication path; A plurality of second communication holes formed on the outer edge of the rotating member at intervals in the circumferential direction; And a movement direction switching driving means for rotating the rotation member in association with the linear movement of the piston rod, wherein a part of the rotation member may be provided to be exposed to the outside.

According to a fifth aspect of the present invention, the chemical liquid injection control means includes a cylindrical valve housing having one end coupled in communication with the discharge path; A valve piston which is hermetically slidably moved inside the valve housing by a fluid flowing through the discharge path; A cover cap coupled to cover the other end of the valve housing; An elastic member provided between the valve piston and the cover cap to elastically support the valve piston; And hydraulic fluid flow control means formed between the valve housing and the valve piston and configured to communicate or block the flow of the extruded vaporized gas introduced through the discharge path through movement of the valve piston. .

In the fifth aspect of the present invention, the valve housing is formed in a cylindrical shape consisting of a relatively small diameter portion and a large diameter portion larger in diameter than the small diameter portion, and the valve piston has an outer diameter corresponding to the inner diameter of the large diameter portion. It is made of a cylindrical H-shaped cross section having a diameter, the cover cap is composed of a coupling cylindrical portion screwed to the inner surface of the valve housing, and a disc dial portion integrally formed on the upper end of the coupling cylindrical portion, the hydraulic fluid flow The control means may include a plurality of first communication holes formed on the side wall of the valve piston, and a plurality of second communication holes formed on the side wall of the valve housing.

According to the medicine injection control device for painless syringes and painless syringes having the same according to the present invention, it is possible to significantly reduce the noise generated, to prevent scars, and to further reduce pain.

In addition, according to the present invention, there is an effect that the absorption in the body can be made faster by effective injection of the subcutaneous tissue.

In addition, according to the present invention, there is an effect that can be very useful in minimizing the effects of noise on the subjects, such as infants, especially in animal procedures such as small bird animals that can die due to impact noise.

Moreover, according to this invention, it is convenient to use, it can be used for various aspects, such as skin beauty, and there exists an effect which can improve usability.

The effects of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a block diagram showing a general syringe.
Figure 2 is a block diagram showing a painless syringe with a chemical solution injection control device according to a first embodiment of the present invention.
3 is a view showing an operating state of a painless syringe including a chemical liquid injection control device according to a first embodiment of the present invention, and showing a neutral state of an operation unit.
4 is a view showing an operating state of a painless syringe having a chemical liquid injection control device according to a first embodiment of the present invention, which shows a state of forward operation (injection operation or ejection operation) of an operation unit;
FIG. 5 is a view showing an operating state of a painless syringe having a chemical liquid injection control device according to a first embodiment of the present invention, and showing a retraction operation (loading operation) state of an operation unit.
6 is a view showing the configuration of a painless syringe having a drug injection control device according to a second embodiment of the present invention.
7 is a view showing a cross-sectional configuration of a chemical injection control device according to a second embodiment of the present invention.
8 is an exploded view illustrating components of a chemical injection control apparatus according to a second embodiment of the present invention.
9 is a view showing the configuration of a painless syringe having a drug injection control device according to a third embodiment of the present invention.
10 is a view showing a cross-sectional configuration of the valve housing constituting the chemical liquid injection control device according to a third embodiment of the present invention.
11 is a view showing a cross-sectional configuration of the valve piston constituting the chemical liquid injection control device according to a third embodiment of the present invention.
12 is a view showing a cross-sectional configuration of the dial cover cap constituting the chemical liquid injection control device according to a third embodiment of the present invention.

Further objects, features and advantages of the present invention can be more clearly understood from the following detailed description and the accompanying drawings.

Prior to the detailed description of the present invention, the present invention may be variously modified and may have various embodiments, and the examples described below and illustrated in the drawings are intended to limit the present invention to specific embodiments. It is to be understood that the present invention includes all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

In addition, the terms "... unit", "... unit", "... module", and the like described in the specification mean a unit for processing at least one function or operation, which means hardware or software or hardware. And software.

In addition, in the following description with reference to the accompanying drawings, the same components will be given the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, a liquid injection control device for a painless syringe and a painless syringe having the same will be described according to a preferred embodiment of the present invention.

First, a liquid injection control device for a painless syringe according to the present invention, the first embodiment is a painless syringe having a rod member which is moved to move the syringe rod constituting the injection unit by the elastic force of the elastic member such as hydraulic pressure or spring In the chemical liquid injection control device is configured on one side of the rod member, a plurality of stopper grooves formed on the outer edge with a gap in the longitudinal direction of the rod member; A mounting hole formed in a body in which the rod member is movable in a direction orthogonal to a moving direction of the rod member; A stopper linearly movable in the mounting hole and in contact with the rod member; A cover cap coupled to cover the mounting hole; And an elastic member (ie, a coil spring) provided between the stopper and the cover cap to elastically support the stopper toward the rod member.

Next, a painless syringe having a chemical liquid injection control apparatus according to the first embodiment will be described in detail with reference to FIGS. 2 to 5. In the following description, the painless syringe is an example of moving the piston rod, which is a rod member, by pneumatic pressure, and may be employed when moving the piston rod, which is a rod member, by elasticity of hydraulic or elastic members, as described above. Of course.

2 is a block diagram showing a painless syringe having a chemical liquid injection control apparatus according to a first embodiment of the present invention, Figures 3 to 5 is a painless provided with a chemical liquid injection control apparatus according to a first embodiment of the present invention Fig. 3 is a view showing the operating state of the syringe, Fig. 3 is a view showing the neutral state of the operation unit, Fig. 4 is a view showing the forward operation (scan operation or the ejection operation) state of the operation unit, and Fig. 5 is the retraction of the operation unit. It is a figure which shows the operation (loading operation) state.

2 to 5, the chemical liquid injection control device according to the first embodiment of the present invention, one end is closed, the valve body having an inner space 101 in the longitudinal direction; A spool valve member (200) provided with both end portions and a central portion so as to be slidably movable in an airtight contact with the inner space of the valve body (100), the through hole (201) being formed in the central portion; A liquefied gas container 300 detachably coupled to the other end of the valve body 100 and communicating with an internal space of the valve body 100 in a state where the nozzle part configured at one end thereof is opened; An operation unit configured at one side of the valve body 100 to move the valve member 200 by a predetermined operation; A cylinder body 500 coupled to one side of the valve body 100 and having one end closed and having an inner space in a longitudinal direction; A piston member (600) provided with one end thereof slidably movable in airtight contact with the inner space of the cylinder body (500) and having a piston rod (610) at the other end thereof; An injection liquid unit 700 detachably coupled to the other end of the cylinder body 500 and having a syringe rod 711 contacted or recessed to the piston rod 610; According to the operation of the operation unit to communicate with and close the inner space of the cylinder body 500 and the inner space of the valve body 100 where one end side of the piston member 600 is located, the cylinder body 500 Gas flow path forming means for communicating and closing the internal space of the external air (outside); And chemical liquid injection control means provided at one side of the cylinder body 500 to control the chemical liquid injection speed by controlling the moving speed of the piston member 600.

The valve body 100 has an inner space (circular inner space) of a length longer than the length of the valve member 200, the other end is formed with a seating port is detachably coupled to the nozzle portion of the liquefied gas container 300 .

The valve member 200 is coupled to a cylindrical body portion, a plurality of extension flange portions extending outwardly from both ends and a central portion of the cylindrical body, respectively, and an end surface of the extension flange portion to the inner surface of the valve body 100. A sliding sealing member (for example, O-ring) 210 for sliding contact while maintaining the airtight is made.

Here, the outer space portion formed between the extension flange portion of the valve member 200 constitutes one component of the gas flow path forming means to be described in detail below.

In the liquefied gas container 300, the nozzle portion of the liquefied gas container 300 is opened at the same time as the valve body 100 is coupled to the liquefied gas container 300. Gas which can be ejected while being vaporized through the nozzle unit of, for example, liquefied carbon dioxide (CO2) may be filled, but is not limited thereto.

Here, the nozzle portion of the liquefied gas container 300 is configured to be coupled to the seating opening of the valve body 100, and at the same time configured to be ejected while the filled liquefied gas (for example, liquefied carbon dioxide) is vaporized, Detailed description thereof will be omitted.

Subsequently, the operation unit is configured to operate in conjunction with, for example, the operation knob 410 provided to the valve body 100 to be slidably movable, and the operation knob 410 to the valve body 100 to perform the operation. The valve member 200 includes an interlocking member (not shown) to move back and forth during a predetermined operation (eg, forward and backward operation) of the knob. Here, the operation knob 410 of the operation unit preferably further includes an elastic restoring member (not shown) to elastically support to be elastically restored to its original state after the forward operation.

Next, the cylinder body 500 has an inner space 501 is formed on one side, the guide hole for communicating with the inner space on the other side and guides the piston rod 610 of the piston member 600 in an airtight manner. Is formed in a cylindrical shape, the other end is formed with a coupling portion 510 detachably coupled to the rod protection cap of the injection unit 700 to be described later.

In addition, the piston member 600 provided in the cylinder body 500 may include a piston rod 610 and an airtight sliding movement along an inner surface of the guide hole of the cylinder body 500, and the piston rod 610. A piston head 620 formed at one end and contacting an inner surface of the cylinder body 500, and provided at an outer edge of the piston head 620 to maintain airtightness while slidingly contacting an inner surface of the cylinder body 500. It comprises a sliding sealing member (for example, O-ring) 630 for.

In addition, the piston member 600 further includes a cushion member 640 provided at an edge portion of the rear surface of the piston head 620 (opposite side of the side where the proximal end of the piston rod 610 is configured). In addition, the cushion member 640 may also be provided on the front surface of the piston head 620 (the surface of the side where the proximal end of the piston rod 610 is configured).

As such, the cushion member 640 provided in the piston member 600 has a piston head 620 formed of a large diameter portion relatively larger than the diameter of the piston rod 610 with a strong force in the inner space of the cylinder body 500. The piston head 620 is cushioned by the cushion member 640 without instantaneous collision with the cylinder body 500 when the momentary sliding movement.

Next, the injection unit 700 is a syringe 710 having a syringe rod 711, one end is coupled to the syringe 710, the other end is coupled to the coupling portion 510 of the cylinder body 500 And a rod protective cap 720 having a syringe coupling portion 721 detachably coupled thereto.

Here, the coupling between the coupling portion 510 of the cylinder body 500 and the syringe coupling portion 721 of the rod protective cap 720 is not particularly limited as long as the components can be detachably coupled. no. For example, the coupling part 510 of the cylinder body 500 may be formed in a cylindrical shape so that the cylinder body 500 and the injection unit 700 may be easily detached, and the syringe coupling part 721 may have a cylindrical shape. It is formed, it can be coupled in a bayonet mounting coupling method that is coupled to the outer edge of the coupling portion 510 and then rotated to one side to be locked.

Next, the gas flow path forming means may include an inflow communication path 810 communicating one side of the inner space 101 of the valve body 100 and one end of the inner space 501 of the cylinder body 500. A discharge communication path 820 communicating the other side of the inner space 101 of the valve body 100 with the other end side of the inner space 501 of the cylinder body 500, and the valve member 200. Is formed on the outer edge and in communication with the discharge communication path 820 and the exhaust communication path 820 in accordance with the forward and backward movement of the valve member 200, and the valve body 200 in communication with the external communication path 830 The discharge path 840 is formed in the).

In the inflow communication path 810, the discharge communication path 820, the external communication path 830, and the discharge path 840, as shown in FIG. 3, in the neutral position of the operation knob 410 of the operation unit. The inflow communication path 810, the discharge communication path 820, the external communication path 830, and the discharge path 840 are not in communication with each other, and the extruded vaporization gas is filled in the inner space 101 of the valve body 100. It has a 1st gas flow path formation state.

In addition, in the inflow communication path 810, the discharge communication path 820, the external communication path 830, and the discharge path 840, an operation (forward operation) of the operation knob 410 for injecting the injection liquid of the injection liquid unit. In the state, as shown in FIG. 4, the inlet communication path 810 is opened so that the extruded vaporization gas (or filling gas) filled in the inner space 101 of the valve body 100 is inside the cylinder body 500. It is supplied to one side of the space 501 to move the piston member 600, the discharge communication path 820 and the outer communication path 830 and the discharge path 840 is the internal space 501 of the cylinder body 500 And a second gas flow path formed in communication with the other side of the.

In addition, in the inflow communication path 810, the discharge communication path 820, the external communication path 830, and the discharge path 840, the operation knob 410 is loaded (retracted operation) as shown in FIG. 5. As described above, the inflow communication path 810 is closed, and the discharge communication path 820 and the internal space 501 of the valve body 100 communicate with each other to fill the internal space 101 of the valve body 100. Gas is supplied, and the external communication path 820 and the discharge path 840 have a third gas flow path that is not in communication with the discharge communication path 820.

According to the present invention, the extruded vaporized gas ejected from the liquefied gas container 300 when the operation knob is operated by the gas flow path forming means configured as described above is internally charged gas (ie, the loaded state) (the valve body 100). It is delivered to the internal space 101 of the vaporized gas) to be delivered to the piston member 600 to deliver a fast and strong ejection pressure it is possible to provide a painless injection device that can inject the injection liquid without instantaneous noise generated .

Next, the chemical liquid injection control means controls the sliding movement of the piston member 600 when the piston member 600 is momentarily moved (less than 1 second) by the pressure of the extruded vaporization gas (filling gas). Constant velocity) to allow the injection of the injection drug by the injection unit to be controlled at a controlled rate.

As shown in the drawing, the chemical liquid injection control means includes a plurality of stopper grooves 910 formed at an outer edge with a gap in the longitudinal direction of the piston rod (rod member) 610 of the piston member 600, and the cylinder body. A mounting hole formed on one side of the guide hole of the 500 in a direction orthogonal to the guide hole, a spherical stopper 920 provided to be linearly movable in the mounting hole on the inner wall side of the guide hole, and the mounting hole. A cover cap 930 coupled to cover the cover, and an elastic member (ie, a coil spring) 940 provided between the spherical stopper 920 and the cover cap 930 to elastically support the spherical stopper 920. Include.

In addition, the mounting hole included in the chemical injection control means and the cover cap 930 are coupled by a screw coupling method, and the cover cap 930 is rotated in a clockwise or counterclockwise direction of the cover cap 930. By adjusting the elastic force of the elastic member, the outer surface of the cover cap 930 according to the coupling pitch of the cover cap 930 based on the outer surface of the cylinder body 500 coupled to the cover cap 930 A design elastic display indicating the action elastic force of the elastic member may be displayed.

Accordingly, it is possible to adjust the pressing force of the spherical stopper 920 against the piston rod 610 by adjusting the elastic force of the elastic member by adjusting the coupling pitch of the cover cap 930.

Since the chemical injection control means is configured, not only noise reduction through control of the moving speed, but also scars on the scanning surface can be reduced, and the pain can be further alleviated.

On the other hand, it will be described a chemical liquid injection control apparatus according to a second embodiment of the present invention.

The chemical liquid injection control device according to the second embodiment of the present invention is a chemical liquid injection control device configured on a path through which hydraulic pressure is discharged from a painless syringe having a rod member which is moved to move the syringe rod of the syringe hydraulically. A one-side closed cylindrical body having a communication part connected to be in communication with a side in which the rod member is disposed in a moving direction for chemical liquid injection in a central part; A cylindrical rotating member rotatably in close contact with the outer edge of the cylindrical body, the cylindrical rotating member being driven in rotation in response to the linear movement of the rod member; And a flow path opening and closing means formed between the cylindrical body and the rotating member and configured to allow and close the discharge of the hydraulic body through the cylindrical body and the rotating member in accordance with the movement of the rod member.

Specifically, the chemical liquid injection control device according to the second embodiment of the present invention will be described in detail with reference to FIGS. 6 to 8. 6 is a view showing the configuration of a painless syringe having a drug injection control device according to a second embodiment of the present invention, Figure 7 is a view showing a cross-sectional configuration of the drug injection control device according to a second embodiment of the present invention 8 is an exploded view of the components of the chemical injection control device according to the second embodiment of the present invention.

In the following description of the chemical liquid injection control device according to the second embodiment of the present invention, the same reference numerals are assigned to the same components as those of the painless syringe including the chemical liquid injection control device according to the first embodiment. Descriptions of the same elements will be omitted or simplified for clarity and simplicity.

The painless syringe to which the chemical liquid injection control device according to the second embodiment of the present invention is applied is applied when the piston rod, which is a rod member, is moved by hydraulic pressure. do.

A painless syringe having a chemical liquid injection control device according to a second embodiment of the present invention, as shown in Figures 6 to 8, one end is closed, the valve body 100 having an inner space 101 in the longitudinal direction ; A spool valve member (200) provided with both end portions and a central portion so as to be slidably movable in an airtight contact with the inner space of the valve body (100), the through hole (201) being formed in the central portion; A liquefied gas container 300 detachably coupled to the other end of the valve body 100 and communicating with an internal space of the valve body 100 in a state where the nozzle part configured at one end thereof is opened; An operation unit configured at one side of the valve body 100 to move the valve member 200 by a predetermined operation; A cylinder body 500 coupled to one side of the valve body 100 and having one end closed and having an inner space in a longitudinal direction; A piston member (600) provided with one end thereof slidably movable in airtight contact with the inner space of the cylinder body (500) and having a piston rod (610) at the other end thereof; An injection liquid unit 700 detachably coupled to the other end of the cylinder body 500 and having a syringe rod 711 contacted or recessed to the piston rod 610; According to the operation of the operation unit to communicate with and close the inner space of the cylinder body 500 and the inner space of the valve body 100 where one end side of the piston member 600 is located, the cylinder body 500 Gas flow path forming means for communicating and closing the internal space of the external air (outside); And a chemical liquid injection control means of the second embodiment, which is provided at one side of the cylinder body 500 to control the chemical liquid injection speed by controlling the moving speed of the piston member 600.

Since the other components in the components of the painless syringe including the second embodiment are the same as those of the painless syringe having the medicine injection control means of the first embodiment, description thereof is omitted, and the chemical liquid of the second embodiment is omitted. Only the injection control means will be described.

The chemical liquid injection control unit of the second embodiment has a surface in which a piston rod 610, which is a rod member, is provided at a central portion thereof and has a communication path 1110 connected in communication with a side from which a hydraulic fluid is disposed in a movement direction for chemical liquid injection. Closed cylindrical body 1100; A cylindrical rotating member 1120 rotatably in close contact with the outer edge of the cylindrical body 1100; An inlet hole 1111 formed at one side of the cylindrical body 1100 such that the discharge filling gas discharged from the valve body 100 flows into the communication path 1110 of the cylindrical body 1100; A first communication hole (communication long hole) 1112 formed to communicate with the communication path 1110 on the other side of the cylindrical body 1100; A plurality of second communication holes 1121 formed at intervals in the circumferential direction on the outer edge of the rotating member 1120; And a movement direction driving unit for rotating the cylindrical rotating member 1120 in response to the linear movement of the piston rod 610, wherein a part of the rotating member 1120 is provided to be exposed to the outside. It is done.

For example, the movement direction switching driving means may include one or more gear teeth formed in the circumferential direction of the rotation member 1120, and a rack gear formed on one side of the piston rod 610 and engaged with the gear teeth. .

In the chemical liquid injection control means of the second embodiment configured as described above, the filling gas which is on the other side of the internal space 501 of the cylinder body 500 is discharged through the discharge path 840 by the drug injection operation of the operation unit, The filling gas discharged to the discharge path 840 is provided to the rotating member 1120, and the second communication formed in the rotating member 1120 is caused by the rotation of the rotating member 1120 which cooperates with the linear movement of the piston rod 610. As the ball 1121 communicates with and closes the first communication hole 1112 of the cylindrical body 1100, the communication relationship is opened and closed to control the movement of the piston rod 610 by controlling the discharge of the filling gas to the outside.

In other words, in the state in which the first communication hole 1112 and the second communication hole 1121 are closed, the filling gas discharged from the internal space 101 of the valve body 100 passes through the inlet hole 1111. Gas flowing into the communication path 1110 of 1100 may not be discharged to the outside through the second communication hole 1121, and in the state in which the first communication hole 1112 and the second communication hole 1121 are opened, It is discharged to the outside through the two communication holes 1121.

Thus, the chemical liquid injection control means of the second embodiment can control the injection speed of the drug by interrupting the flow of the filled gas in conjunction with the movement of the piston rod 610 as the rod member.

Next, a chemical injection control device according to a third embodiment of the present invention will be described.

The chemical liquid injection control device according to the third embodiment of the present invention is a chemical liquid injection control device configured on a path through which a hydraulic fluid is discharged from a painless syringe having a rod member moved to move a syringe rod of a syringe by hydraulic pressure. A housing into which the hydraulic fluid flows; A movable body provided to be slidably movable in the housing; An elastic member provided in the housing to elastically support the movable body; And hydraulic fluid flow control means formed between the housing and the mobile body to control a flow in which the hydraulic fluid flowing in accordance with the linear movement of the mobile body communicates with the outside.

Specifically, the chemical liquid injection control apparatus according to the third embodiment of the present invention will be described in detail with reference to FIGS. 9 to 12. 9 is a view showing the configuration of a painless syringe having a chemical injection control device according to a third embodiment of the present invention, Figure 10 is a valve housing constituting a chemical injection control device according to a third embodiment of the present invention 11 is a view showing a cross-sectional configuration, Figure 11 is a view showing a cross-sectional configuration of the valve piston constituting the chemical liquid injection control device according to a third embodiment of the present invention, Figure 12 is a chemical liquid injection according to a third embodiment of the present invention It is a figure which shows the cross-sectional structure of the dial type cover cap which comprises a control apparatus.

In the following description of a painless syringe having a chemical injection control device according to a third embodiment of the present invention, the same components as those of the painless syringe having a chemical injection control device according to the first and second embodiments described above For the sake of clarity and simplicity, the description of the same elements will be omitted or simplified.

The painless syringe to which the chemical liquid injection control device according to the third embodiment of the present invention is applied will be described as being applied when the piston rod, which is a rod member, is moved by pneumatic pressure.

A painless syringe having a chemical liquid injection control device according to a third embodiment of the present invention, as shown in Figures 9 to 12, one end is closed, the valve body 100 having an inner space 101 in the longitudinal direction ; A spool valve member (200) provided with both end portions and a central portion so as to be slidably movable in an airtight contact with the inner space of the valve body (100), the through hole (201) being formed in the central portion; A liquefied gas container 300 detachably coupled to the other end of the valve body 100 and communicating with an internal space of the valve body 100 in a state where the nozzle part configured at one end thereof is opened; An operation unit configured at one side of the valve body 100 to move the valve member 200 by a predetermined operation; A cylinder body 500 coupled to one side of the valve body 100 and having one end closed and having an inner space in a longitudinal direction; A piston member (600) provided with one end thereof slidably movable in airtight contact with the inner space of the cylinder body (500) and having a piston rod (610) at the other end thereof; An injection liquid unit 700 detachably coupled to the other end of the cylinder body 500 and having a syringe rod 711 contacted or recessed to the piston rod 610; According to the operation of the operation unit to communicate with and close the inner space of the cylinder body 500 and the inner space of the valve body 100 where one end side of the piston member 600 is located, the cylinder body 500 Gas flow path forming means for communicating and closing the internal space of the external air (outside); And a chemical liquid injection control means of the third embodiment, which is provided at one side of the cylinder body 500 to control the chemical liquid injection speed by controlling the moving speed of the piston member 600.

Since the other components are the same as the configuration of the painless syringe having the chemical liquid injection control means of the first and second embodiments described above, description thereof is omitted, and only the chemical liquid injection control means of the third embodiment will be described.

Chemical liquid injection control means of the third embodiment, the cylindrical valve housing 1210 having one end coupled in communication with the discharge path (840); A valve piston 1220 provided to be slidably moveable in the valve housing 1210 by the fluid flowing through the discharge path 840; A cover cap 1230 coupled to cover the other end of the valve housing 1210; An elastic member 1240 provided between the valve piston 1220 and the cover cap 1230 to elastically support the valve piston 1220; And a flow formed between the valve housing 1210 and the valve piston 1220 to communicate or block the flow of the hydraulic fluid (gas) introduced through the discharge path 840 by linear movement of the valve piston 1220. It includes; hydraulic fluid flow control means configured to.

As shown in FIG. 10, the valve housing 1210 has a cylindrical shape including a relatively small diameter portion 1211 and a large diameter portion 1212 larger in diameter than the small diameter portion.

The valve piston 1220 is formed in a cylindrical H-shaped cross-section, the outer diameter is formed having a diameter corresponding to the inner diameter of the large diameter portion of the valve housing 1210. In other words, the valve piston 1220 is formed inside a cylindrical portion 1221 having a diameter corresponding to the inner diameter of the large diameter portion of the valve housing 1210, and inside the middle portion of the cylindrical portion. Compartment partition 1222 is included.

12, the cover cap 1230 includes a coupling cylindrical portion 1231 and a disc dial 1232 integrally formed at an upper end of the coupling cylindrical portion 1231.

Here, the cover cap 1230 and the valve housing 1210 are made to be coupled in a screwed manner. In other words, a threaded portion is formed on an outer surface of the coupling cylindrical portion 1231 of the cover cap 1230, and a threaded portion is formed on an inner surface of an upper end of the valve housing 1210 to be engaged with each other.

The screw coupling of the cover cap 1230 and the valve housing 1210 is the elastic force of the elastic member 1240 acting on the valve piston 1220 by adjusting the pitch interval by rotating the disc dial 1232 in the forward or reverse direction By adjusting the, the vibration speed of the valve piston 1220 can be adjusted.

Subsequently, the elastic member 1240 is formed of a coil spring, one end of which is seated inside the engagement cylindrical portion 1231 of the cover cap 1230, and the other end of the elastic member 1240 is located inside the upper portion of the valve piston 1220. It is seated on and stablely supported.

Next, the hydraulic fluid flow control means includes a plurality of first communication holes 1251 formed on the side wall of the valve piston 1220, and a plurality of second communication holes formed on the side wall of the valve housing 1210 ( 1252).

In the chemical liquid injection control means of the third embodiment configured as described above, the filling gas which is on the other side of the inner space 501 of the cylinder body 500 is discharged through the discharge path 840 by the drug injection operation of the operation unit, The filling gas discharged into the discharge path 840 pushes up the valve piston 1220 and opens the first communication hole 1251 of the valve piston 1220 and the second communication hole 1252 of the valve housing 1210. And the valve piston 1220 moves downward when the elastic force of the elastic member 1240 is greater than the discharge pressure, so that the first communication hole 1251 of the valve piston 1220 communicates with the second housing of the valve housing 1210. The ball 1252 opens and closes the communication relationship while repeating the operation of preventing communication.

On the other hand, the painless syringe having the chemical liquid injection control device according to the first to the third embodiment according to the present invention shows a case where the liquefied gas container 300 is coupled in the longitudinal direction of the valve body 100, liquefaction The gas container 300 may be configured to be orthogonally coupled to the valve body 100.

Specifically, the painless syringe having the chemical liquid injection control apparatus according to each embodiment of the present invention may be configured in a gun type so as to easily grip and further increase usability. For example, further comprising a handle housing for receiving a liquefied gas container on the lower surface or the upper surface of one end of the valve body 100, the liquefied gas on the lower surface or the upper surface of the one end of the valve body 100 to which the handle housing is coupled A seating hole is formed to detachably couple the nozzle part of the container 300, and the seating hole is formed to communicate with the inner space 101 of the valve body 100 through a communication passage.

The liquefied gas container 300 is coupled to the receiving space of the handle housing 120 mounted.

According to the drug injection control device and a painless syringe having the same according to the present invention as described above, it is possible to significantly reduce the noise generated, to prevent scars, to further relieve pain, and to effectively inject into the subcutaneous tissue. Injection has the advantage of allowing faster absorption in the body.

In addition, according to the present invention, it is possible to minimize the effect of the noise to the subjects such as infants, especially in animal procedures such as small bird animals that can die due to the impact noise, it is very useful, easy to use, skin beauty, etc. There is an advantage that can be used in a variety of ways to improve the usability.

The embodiments and the accompanying drawings described herein are merely illustrative of some of the technical ideas included in the present invention. Therefore, since the embodiments disclosed herein are not intended to limit the technical spirit of the present invention, but to explain, it is obvious that the scope of the technical spirit of the present invention is not limited by these embodiments. Modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical idea included in the specification and drawings of the present invention should be construed as being included in the scope of the present invention.

100: valve body
101: internal space of the valve body
200: valve member
210, 630: sliding seal member
300: liquefied gas container
410: operation knob
500: cylinder body
510: coupling part
501: internal space of the cylinder body
600: piston member
610: piston rod
620: piston head
640: cushion member
700: injection liquid unit
710: syringe
711: syringe rod
720: rod protection cap
721: coupling part
810: inflow path
820: exhaust communication path
830: external communication path
840: exhaust path
910: stopper groove
920: old stopper
930: cover cap
940, 1240: elastic member
1100: cylindrical body
1111: inlet hole
1112: first communicator
1120: rotating member
1121: second communication hole
1210: valve housing
1211: small diameter
1212: big neck
1220: valve piston
1221: cylinder
1222: compartment bulkhead
1230: cover cap
1231: coupling cylinder
1232: disc dial
1251: first communication hole
1252: second communicator

Claims (12)

A liquid injection control device for a painless syringe configured on one side of the rod member in a painless syringe having a rod member moved to move the syringe rod constituting the injection unit by the elastic force of the hydraulic or elastic member,
A plurality of stopper grooves formed on the outer edge of the rod member with a distance in the longitudinal direction;
A mounting hole formed in a body in which the rod member is movable in a direction orthogonal to a moving direction of the rod member;
A stopper movably provided in the mounting hole and in contact with the rod member;
A cover cap coupled to cover the mounting hole; And
And an elastic member provided between the stopper and the cover cap to elastically support the stopper toward the rod member.
Chemical injection control device for painless syringe.
A chemical liquid injection control apparatus for a painless syringe configured on a path through which gas is discharged from a painless syringe having a rod member moved by gas pressure to move a syringe rod of a syringe,
A cylindrical body having a communication path connected in communication with a side through which gas is discharged, and formed to be closed at one surface thereof;
A cylindrical rotating member rotatably provided at an outer periphery of the cylindrical body and driven to rotate in response to a linear movement of the rod member; And
And opening and closing means formed between the cylindrical body and the rotating member and configured to allow and close the gas discharge through the cylindrical body and the rotating member according to the movement of the rod member.
The flow opening and closing means is formed with an inlet hole formed on one side of the cylindrical body, a first communication hole formed to communicate with the communication path on the other side of the cylindrical body, and the outer edge of the rotating member at intervals in the circumferential direction Including a plurality of second communication hole, when the first communication hole and the second communication hole is in communication with the exhaust gas flowing through the inlet hole is discharged to the outside through the second communication hole
Chemical injection control device for painless syringe.
A chemical liquid injection control apparatus for a painless syringe configured on a path through which gas is discharged from a painless syringe having a rod member moved by gas pressure to move a syringe rod of a syringe,
A housing into which the hydraulic fluid flows;
A movable body provided to be slidably movable in the housing;
An elastic member provided in the housing to elastically support the movable body; And
And a hydraulic fluid flow control means formed between the housing and the mobile body to control a flow in which the hydraulic fluid flowing in accordance with the movement of the mobile body communicates with the outside.
The hydraulic fluid flow control means includes a plurality of first communication holes formed in the movable body and a plurality of second communication holes formed in the housing, and the first communication hole and the second communication hole are moved by the movement of the movable body. In communication, the hydraulic fluid flowing into the housing is discharged to the outside through the second communication hole
Chemical injection control device for painless syringe.
Painless syringe comprising a drug injection control device for painless syringe according to claim 1.
The method of claim 4, wherein
The painless syringe is
A valve body having an inner space;
A liquefied gas container connected to an internal space of the valve body in an open state, the liquefied gas container coupled to the extruded vaporized gas into the valve body;
A valve body penetrating through a central portion provided to slidably move the inner space of the valve body in an airtight manner;
An operation unit configured on one side of the valve body and slidingly moving the valve body in a front-rear operation;
A cylinder body coupled to one side of the valve body, the cylinder body having an internal space and detachably coupled to an injection liquid unit having a syringe rod;
A piston rod body as the rod member slidably provided in an inner space of the cylinder body;
An inflow communication path communicating one side of the inner space of the valve body with one end of the inner space of the cylinder body;
A discharge communication path communicating between the other side of the inner space of the valve body and the other end side of the inner space of the cylinder body;
At least one outer communication passage formed at an outer edge of the valve member and in communication with and closed with the discharge communication passage according to the forward and backward movement of the valve member;
A discharge path formed in the valve body in communication with an external and the external communication path; And
Includes; the chemical liquid injection control device for a painless syringe provided in association with the discharge path
Painless syringe.
The method of claim 5,
The valve member is coupled to a cylindrical body portion, a plurality of extension flange portions extending outwardly from both ends and a central portion of the cylindrical body, respectively, and an end surface of the extension flange portion, and is in sliding contact with an inner surface of the valve body. Including a sliding sealing member to provide,
The cylinder body is formed in a cylindrical shape in which an inner space is formed on one side, and a guide hole for communicating with the inner space on the other side and airtightly guides the piston rod of the piston member, and the other end constitutes the injection unit. The coupling part is detachably coupled with the coupling part of the rod protective cap,
The piston member is provided on a piston rod sliding along an inner surface of the guide hole of the cylinder body, a piston head formed at one end of the piston rod and in contact with an inner surface of the cylinder body, and an outer edge of the piston head. And a sliding sealing member for providing airtightness while slidingly contacting the inner surface of the cylinder body.
Painless syringe.
The method of claim 6,
Further comprising a cushion member provided at the edge of the front and rear of the piston head
Painless syringe.
A valve body having an inner space;
A liquefied gas container connected to an internal space of the valve body in an open state, the liquefied gas container coupled to the extruded vaporized gas into the valve body;
A valve body penetrating through a central portion provided to slidably move the inner space of the valve body in an airtight manner;
An operation unit configured on one side of the valve body and slidingly moving the valve body in a front-rear operation;
A cylinder body coupled to one side of the valve body, the cylinder body having an internal space and detachably coupled to an injection liquid unit having a syringe rod;
A piston rod body as the rod member slidably provided in an inner space of the cylinder body;
An inflow communication path communicating one side of the inner space of the valve body with one end of the inner space of the cylinder body;
A discharge communication path communicating between the other side of the inner space of the valve body and the other end side of the inner space of the cylinder body;
At least one outer communication passage formed at an outer edge of the valve member and in communication with and closed with the discharge communication passage according to the forward and backward movement of the valve member;
A discharge path formed in the valve body in communication with an external and the external communication path; And
It is provided on one side of the cylinder body; chemical liquid injection control means for controlling the movement speed of the piston member;
Painless syringe.
The method of claim 8,
The chemical injection control means
A plurality of stopper grooves formed on the outer edge with a gap in the longitudinal direction of the piston rod;
A mounting hole formed in a direction orthogonal to the guide hole at one side of the guide hole of the cylinder body;
A spherical stopper provided to be linearly movable in the mounting hole on the inner wall side of the guide hole;
A cover cap coupled to cover the mounting hole; And
And an elastic member provided between the spherical stopper and the cover cap to elastically support the spherical stopper.
Painless syringe.
The method of claim 9,
The chemical injection control means
A one-sided closed cylindrical body provided with a communication path connected in communication with the side through which the extruded vaporization gas is discharged;
A cylindrical rotating member rotatably in close contact with the outer edge of the cylindrical body;
An inlet hole formed on one side of the cylindrical body such that the extruded vaporized gas discharged from the valve body flows into the communication path side of the cylindrical body;
A first communication hole formed on the other side of the cylindrical body so as to communicate with the communication path;
A plurality of second communication holes formed on the outer edge of the rotating member at intervals in the circumferential direction; And
Includes; movement direction switching drive means for rotationally driving the rotating member in conjunction with the linear movement of the piston rod,
Part of the rotating member is characterized in that it is provided to be exposed to the outside
Painless syringe.
The method of claim 9,
The chemical injection control means
A cylindrical valve housing having one end coupled in communication with the discharge path;
A valve piston which is hermetically slidably moved inside the valve housing by a fluid flowing through the discharge path;
A cover cap coupled to cover the other end of the valve housing;
An elastic member provided between the valve piston and the cover cap to elastically support the valve piston; And
A hydraulic fluid flow control means formed between the valve housing and the valve piston and configured to communicate with or block the flow of the extruded vaporized gas introduced through the discharge path by the movement of the valve piston.
Painless syringe.
The method of claim 11,
The valve housing is formed in a cylindrical shape consisting of a relatively small diameter portion and a large diameter portion larger in diameter than the small diameter portion,
The valve piston is made of a cylindrical H-shaped cross section having an outer diameter corresponding to the inner diameter of the large diameter portion,
The cover cap is composed of a coupling cylindrical portion screwed to the inner surface of the valve housing, and a disc dial portion integrally formed on the upper end of the coupling cylindrical portion,
The hydraulic fluid flow control means includes a plurality of first communication holes formed on the side wall of the valve piston, and a plurality of second communication holes formed on the side wall of the valve housing.
Painless syringe.

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