Head for handle and liquid jet injection device comprising same

Abstract

Disclosed is a head for a handle, which is configured so as to be capable of discharging a liquid medicine stored therein to the outside when pressurized by an external force. The handle head includes: an inlet chamber part coupled to the handle main body, the interior of which is provided with a liquid medicine filling space; a feeder part which is connected to the inlet chamber part and is formed so as to inject the liquid medicine into the liquid medicine filling space; a piston installed inside the inlet chamber portion and configured to push the liquid medicine filled in the liquid medicine filling space when pressurized by an external force; an elastic support member formed to elastically support the piston; and an outlet chamber portion coupled to the inlet chamber portion and configured to discharge the liquid medicine by pressurization of a piston, in which an end portion of the piston defines a portion of a liquid medicine filling space.

Description

Technical Field

[0001] The present invention relates to a handle head configured to discharge internally stored liquid medicine to the outside when subjected to external pressure, and a liquid injection device having the handle head. Background Technology

[0002] Techniques that use accelerated liquids to cut and penetrate target objects are widely used. One of the most representative methods is ultra-high pressure cutting, known as waterjet cutting. Waterjet cutting is a device that uses ultra-high pressure compressed water or an abrasive mixture, sprayed through orifices and nozzles onto the surface of a target object, to achieve cutting according to the desired shape.

[0003] On the other hand, a syringe is typically used to inject medication into the tissue. A syringe consists of a needle that pierces the tissue, a barrel filled with medication, and a movable piston inserted within the barrel. This syringe is configured to allow the medication to penetrate the tissue by moving the piston within the barrel.

[0004] Although syringes are efficient tools for delivering medication, issues such as the risk of infection caused by needles, fear of needles, and inconvenience of use are still mentioned. Therefore, research on needle-free syringes has been continuously advancing in recent years.

[0005] An example of a needle-free injector is as follows: An energy device capable of pressurizing the piston is incorporated within the syringe barrel. Utilizing the orifice and nozzle structure within the water jet, a drug delivery device can be created that replaces grinding mixtures, continuously supplying and stably delivering the drug solution. In this device, the high-pressure water jet mixes with the externally supplied mixture and passes through the nozzle at extremely high speed. This allows for the control of the water jet to operate only at specific times, and for the sequential supply of drug solution from the outside in accordance with a corresponding operational sequence.

[0006] Furthermore, some needle-free injectors utilize strong air pressure to compress air, which is then pressurized by a piston within the cylinder to inject a drug solution filled within the cylinder into the skin. In this traditional method, an elastic member forming a diaphragm is located between the drug solution within the cylinder and the piston. In other words, with conventional needle-free injectors, the kinetic energy of the pressurized piston, rather than the drug solution, is transferred to the elastic member through the compression of the air; the elastic member deforms substantially to pressurize the drug solution and achieve injection.

[0007] In the structure of such traditional needle-free injectors, the kinetic energy of the piston is transferred to the liquid medication via an elastic component. As the injector is used over time, or even when not in use, the elastic force of the component may change over time, potentially leading to a decrease in the accuracy of energy transfer via the piston. Consequently, traditional needle-free injectors may result in reduced reliability in the accuracy of liquid medication dispensing. Summary of the Invention

[0008] The technical issues to be solved A handle head is provided that can more stably maintain the magnitude of the external force transmitted to the liquid for dispensing the liquid, and a liquid jet injection device having the handle head is provided.

[0009] Technical solutions to technical problems To achieve the objectives of this invention, a handle head according to an embodiment of the present invention includes: an inlet chamber part connected to a handle body, having an internal medicine filling space; a feeder part connected to the inlet chamber part, configured to dispense medicine into the medicine filling space; a piston installed inside the inlet chamber part, configured to push the medicine filling the medicine filling space when pressurized by an external force; an elastic support member configured to elastically support the piston; and an outlet chamber part connected to the inlet chamber part, configured to discharge the medicine through pressurization of the piston, wherein the end of the piston defines a portion of the medicine filling space.

[0010] According to one example of the invention, the end of the piston may be configured to contact the liquid filling the liquid filling space.

[0011] According to one example of the present invention, the out-of-mouth chamber may include: an out-of-mouth chamber body, an in-mouth chamber body connected to the in-mouth chamber, having a drug discharge valve mounting groove and a drug discharge outlet communicating with the drug discharge valve mounting groove; and a drug discharge valve, installed in the drug discharge valve mounting groove, wherein the drug discharge valve may be configured to contact the drug filling space.

[0012] According to one example of the invention, the liquid discharge valve may be arranged such that it is spaced apart from the end of the liquid filling space that faces the piston.

[0013] According to one example of the present invention, the inlet chamber may include: an inlet chamber body formed detachably from the handle body, having a piston mounting groove and a drug dispensing valve mounting groove respectively communicating with the drug filling space at different positions; and a drug dispensing valve mounted in the drug dispensing valve mounting groove, wherein the feeder portion may be arranged to correspond to the drug dispensing valve.

[0014] According to one example of the invention, the piston may include: a piston head formed to be exposed to the outside of the inlet chamber and subjected to external forces; a piston rod extending from the piston head, the end of which defines the liquid filling space and has at least one O-ring groove; and an O-ring mounted in the O-ring groove.

[0015] According to one example of the invention, the resilient support member may be formed around the piston rod and supported by the piston head and the piston mounting groove facing each other.

[0016] According to one example of the invention, the elastic support member may be annular with a hollow portion, wherein the piston rod is accommodated in the hollow portion.

[0017] According to another embodiment of the present invention, a liquid injection device includes: a handle body; and a handle head coupled to the handle body; wherein the handle body includes: a cylindrical portion having a cylindrical body, a housing surrounding the cylindrical body, and a hammer housed inside the cylindrical body and configured to move between one end and another end of the cylindrical body; a control valve portion configured to selectively open and close an inlet flow path and an exhaust flow path, the inlet flow path being connected to a compressed air generating portion that generates compressed air supplied to the interior of the cylindrical body and one end of the cylindrical body, the exhaust flow path being connected to one end of the cylindrical body and the outside; and a pressurizing portion having a pressurizing member opposite to an opening formed at the other end of the cylindrical body and coupled to the inlet chamber portion, wherein when the hammer house strikes the pressurizing member, the pressurizing member is configured to pressurize the piston.

[0018] According to one example of the invention, a filling portion may be provided between the housing and the cylinder, the filling portion being in communication with the other end of the cylinder, and when the air intake passage is opened, the compressed air is compressed and filled in the filling portion, and the hammer may be configured such that, in a state where it has moved from one end of the cylinder to the other end due to the opening of the air intake passage, when the exhaust passage is opened, the hammer moves from the other end of the cylinder to one end by compressing the compressed air filled in the filling portion.

[0019] Invention Effects The effects of the present invention obtained by the above method are as follows.

[0020] The handle head includes: an inlet chamber having a medicine filling space; a feeder for adding medicine into the medicine filling space of the inlet chamber; a piston installed inside the inlet chamber and pushing the medicine filling in the medicine filling space when pressurized by an external force; an elastic support member arranged on the piston's movement path to elastically support the piston; and an outlet chamber connected to the inlet chamber and discharging the medicine through the pressurization of the piston. The end of the piston is formed to define a portion of the medicine filling space.

[0021] According to the structure of this handle head, the piston, which transmits the external force for discharging the medicine to the medicine filling space, is configured to directly pressurize the medicine filling space. That is, the handle head of the present invention does not include an additional structure between the end of the piston and the medicine filling space for transmitting the external force of the piston to the medicine filling space. Therefore, the external force applied to the piston for discharging the medicine can be transmitted to the medicine filling space as is.

[0022] In conclusion, by maintaining a constant external force applied to the drug filling space via a piston, a handle head and a liquid injection device with the same handle head can be provided that offer higher reliability in drug dispensing accuracy compared to a handle head that includes additional structures between the piston and the drug filling space. Furthermore, a handle head and a liquid injection device with the same handle head can be provided that achieve high energy transfer efficiency by reducing energy loss transmitted to the drug through the piston. Attached Figure Description

[0023] Figure 1 This is a perspective view showing how the handle head is connected to the handle body according to an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 The diagram shows a handle head and a liquid injection device having the handle head.

[0025] Figure 3 It is shown Figure 1 The diagram shows a three-dimensional representation of the handle with its head disassembled.

[0026] Figure 4 It is shown Figure 3 The diagram shows the open and closed states of the liquid discharge valve and the liquid inlet valve.

[0027] Figure 5 It is shown Figure 2 A conceptual diagram showing a portion of the liquid jet injection device being separated.

[0028] Figure 6 It is along Figure 5The cross-sectional view shown is taken by line AA.

[0029] Figure 7 It is shown Figure 2 A conceptual diagram of the liquid jet injection device before the air intake path is opened.

[0030] Figure 8 yes Figure 7 The diagram shown is a conceptual illustration of a liquid jet injection device, illustrating how the air intake path is opened, causing the hammer to move from one end of the cylinder to the other.

[0031] Figure 9 yes Figure 8 The diagram shows a concept of a liquid jet injection device, in which a hammer moves to the other end of the cylinder and impacts a pressurizing component, which then moves a certain distance due to the impact.

[0032] Figure 10 yes Figure 9 The diagram shows a concept of a liquid injection device, illustrating how, after the hammer impacts the pressurizing component, the exhaust path is opened, causing the hammer to move toward one end of the cylinder.

[0033] Figure 11 yes Figure 10 The diagram shows a concept of a liquid jet injection device, illustrating the state in which the hammer moves to one end of the cylinder and returns to its initial position. Detailed Implementation

[0034] The handle head and liquid injection device having the handle head of the present invention will now be described in more detail with reference to the accompanying drawings.

[0035] In this specification, even in different embodiments, the same or similar structures are assigned the same or similar reference numbers, and repeated descriptions of this are omitted.

[0036] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0037] Figure 1 This is a perspective view showing how the handle head 140 is connected to the handle body 100a according to an embodiment of the present invention. Figure 2 yes Figure 1 The diagram shows a concept of a handle head 140 and a liquid injection device 100 having the handle head 140. Figure 3 It is shown Figure 1 The diagram shows a three-dimensional representation of the handle with its head 140 disassembled. Figure 4 It is shown Figure 3A perspective view of the open and closed states of the medicine discharge valve 145b and the medicine inlet valve 141c. Figure 5 It is shown Figure 2 A conceptual diagram showing a portion of the liquid jet injection device 100 being separated. Figure 6 It is along Figure 5 The cross-sectional view shown is taken along line AA. Furthermore, Figure 4 (a) shows the medicine discharge valve 145b and medicine inlet valve 141c in the closed state. Figure 4 (b) shows the state in which the liquid discharge valve 145b and the liquid inlet valve 141c are open.

[0038] Reference Figures 1 to 6 The liquid injection device 100 includes a handle body 100a and a handle head 140.

[0039] The handle body 100a is configured to generate an external force for discharging the liquid medicine and to transmit that force to the handle head 140, which performs the filling and discharging of the liquid medicine. A more detailed description of the handle body 100a will be provided later.

[0040] The handle head 140 includes an inlet chamber part 141, a feeder part 142, a piston 143, an elastic support member 144, and an outlet chamber part 145.

[0041] The oral cavity chamber 141 is connected to the handle body 100a and has a medicine filling space 141a inside. The oral cavity chamber 141 may include an oral cavity body 141b and a medicine inlet valve 141c.

[0042] The oral cavity body 141b is detachably formed from the handle body 100a, and may have a piston mounting groove 141b1 and a medicine dispensing valve mounting groove 141b2 respectively communicating with the medicine filling space 141a at different positions. The oral cavity body 141b is configured to accommodate a piston 143 on its inner side. The piston 143 may be configured to move back and forth while surrounded by the oral cavity body 141b.

[0043] Here, the liquid injection valve 141c can be configured to be installed within the liquid injection valve mounting groove 141b2. Furthermore, the feeder unit 142 can be arranged correspondingly to the liquid injection valve 141c. The liquid injection valve 141c can be configured to selectively open and close the liquid injection port of the inlet chamber body 141b based on the pressure difference.

[0044] The feeder section 142 can be configured to connect to the inlet chamber section 141 and dispense the liquid medicine into the liquid medicine filling space 141a. Furthermore, as... Figure 1 As shown, a syringe (syringe) capable of containing liquid medicine and configured to supply the contained liquid medicine to the feeder section 142 may be connected to the feeder section 142.

[0045] Piston 143 is installed within the inlet chamber 141 and configured to push the medicine filling the medicine filling space 141a when pressurized by an external force. At this time, the end of piston 143 can be configured to directly contact the medicine filling space 141a of the inlet chamber 141. Furthermore, the external force applied to piston 143 can be generated by high-pressure air hammering, laser methods, or magnetic methods.

[0046] In addition, piston 143 may include piston head 143a, piston rod 143b and O-ring 143c.

[0047] The piston head 143a can be configured to be exposed to the outside of the inlet chamber 141 and receive external forces.

[0048] The piston rod 143b extends from the piston head 143a, and its end defines the liquid filling space 141a, and as follows: Figure 2 As shown, it can have at least one O-ring groove 143b1.

[0049] O-ring 143c can be configured to be installed in O-ring groove 143b1. O-ring 143c can be composed of a first O-ring 143c1 and a second O-ring 143c2. Furthermore, the first O-ring 143c1 and the second O-ring 143c2 can be made of the same or different materials. In this case, O-ring groove 143b1 can be composed of a first O-ring groove 143b1a and a second O-ring groove 143b1b corresponding to the first O-ring 143c1 and the second O-ring 143c2, respectively.

[0050] Furthermore, in conventional methods, it is believed that hygiene issues do not exist only when the liquid filling space 141a and the piston 143 are not in direct contact, but rather have an additional structure such as an elastic membrane. However, the present invention is configured such that the O-ring 143c functions as such an elastic membrane.

[0051] In addition, piston 143 can be made of, for example, a plastic material that is harmless to the human body.

[0052] The elastic support member 144 can be formed as an elastic support piston 143.

[0053] Furthermore, the elastic support member 144 can be formed to surround the piston rod 143b, and can be configured to be supported by the piston head 143a and the piston mounting groove 141b1 facing each other. Therefore, the elastic support member 144 can be configured to remain stably arranged in a predetermined position inside the inlet chamber 141 without deviating.

[0054] In addition, the elastic support member 144 is inserted between the piston head 143a and the piston mounting groove 141b1, which can provide elastic force to the piston 143 to restore the piston 143 that has moved due to impact with the pressurizing member 131.

[0055] Furthermore, the elastic support member 144 may be annular with a hollow portion 144a, in which the piston rod 143b is accommodated.

[0056] The outlet chamber 145 can be configured to connect to the inlet chamber 141 and discharge the liquid medicine to the outside by pressurization of the piston 143. For example, the outlet chamber 145 may include an outlet chamber body 145a and a liquid medicine discharge valve 145b. Here, the liquid medicine discharge valve 145b can be configured to contact the liquid medicine filled in the liquid medicine filling space 141a.

[0057] The out-of-mouth chamber 145 can be configured to connect to the in-mouth chamber 141 and discharge the liquid medicine to the outside by pressurization of the piston 143.

[0058] The oral cavity body 145a can be connected to the oral cavity body 141b of the oral cavity section 141, and can have a liquid discharge valve mounting groove 145a1 and a liquid discharge outlet 145a2 communicating with the liquid discharge valve mounting groove 145a1.

[0059] The liquid discharge valve 145b can be installed in the liquid discharge valve mounting groove 145a1.

[0060] Here, the liquid discharge valve 145b can be configured to contact the liquid filling space 141a. Furthermore, the liquid discharge valve 145b can be formed as another part defining the liquid filling space 141a.

[0061] Furthermore, the liquid discharge valve 145b can be formed as another part defining the liquid filling space 141a. For example... Figure 4 As shown, the liquid discharge valve 145b can selectively open and close the liquid discharge port 145a2 of the oral cavity body 145a by means of pressure difference.

[0062] Furthermore, the liquid discharge valve 145b can be arranged such that it is spaced apart from the end of the liquid filling space 141a that faces the piston 143.

[0063] Furthermore, fluids such as pharmaceutical solutions need to move steadily in a single direction from inlet to outlet. Moreover, check valves are a very common type of device used to block or control the flow of fluids relative to their direction of flow. Various types of these check valves are commercially available, readily accessible, and can be selectively applied based on the fluid's flow direction, pressure, material, and other factors.

[0064] Here, the end of the piston 143 facing the liquid filling space 141a is configured to define a portion of the liquid filling space 141a. That is, there is no additional structure between the end of the piston 143 and the liquid filling space 141a for transmitting external forces from the piston 143 to the liquid filling space 141a.

[0065] Based on the structure of the head 140 described above, the piston 143, which transmits the external force for discharging the medicine to the medicine filling space 141a filled in the inlet chamber 141, is configured to directly pressurize the medicine filling space 141a. That is, the handle head 140 does not include an additional structure between the end of the piston 143 and the medicine filling space 141a for transmitting the external force of the piston 143 to the medicine filling space 141a. Therefore, the external force applied to the piston 143 for discharging the medicine can be transmitted to the medicine filling space 141a as is. For example, assuming the magnitude of the external force applied to the piston 143 is 100%, the piston 143 of the present invention can stably transmit 85% or more of the energy to the medicine filling space 141a.

[0066] In conclusion, by maintaining a constant external force applied to the drug filling space 141a via the piston 143, compared to a conventional handle head 140 that further includes additional structures between the piston 143 and the drug filling space 141a, a handle head 140 and a liquid injection device 100 with the handle head 140 can be provided that offer higher reliability in drug dispensing accuracy. Furthermore, a handle head 140 and a liquid injection device 100 with the handle head 140 can be provided that achieve high energy transfer efficiency by reducing energy loss transmitted to the drug through the piston 143.

[0067] The handle body 100a that transmits external force to the head 140 will be described in more detail below.

[0068] The handle body 100a is connected to the head 140, forming the part that the user holds when using the liquid jet injection device 100. Furthermore, the handle body 100a is configured to transmit the external force for discharging the liquid to the head 140. The handle body 100a includes a cylindrical portion 110, a control valve portion 120, and a pressurizing portion 130.

[0069] The cylindrical part 110 has a cylindrical body 111, a shell 112 and a hammer body 113.

[0070] The cylindrical body 111 extends in one direction. The inner side of the cylindrical body 111 has a space within which the hammer 113 can move between one end and the other end of the cylindrical body 111. The cylindrical body 111 may be cylindrical with both ends open, or only the other end open. Furthermore, the shape of the cylindrical body 111 is not limited to a cylindrical shape; it may also be formed into other polygonal cylindrical shapes besides a cylindrical shape, with an inner space for the hammer 113 to move.

[0071] The shell 112 is arranged on the outside of the cylinder 111 and is formed to surround the cylinder 111.

[0072] The hammer 113 is housed within the interior 111a of the cylinder 111 and is configured to move between one end and the other end of the cylinder 111. The hammer 113 may be configured to correspond to the inner surface of the cylinder 111. For example, when the cylinder 111 is cylindrical, the hammer 113 may also be cylindrical or cylindrical in shape. The opposing surfaces of the cylinder 111 and the hammer 113 are correspondingly formed, allowing the hammer 113 to move while being stably guided inside the cylinder 111.

[0073] The control valve section 120 can be configured to selectively open and close the intake flow path 161 and the exhaust flow path 162.

[0074] The air intake passage 161 forms a flow path for compressed air to flow into the interior of the cylinder 111. The air intake passage 161 is configured to connect the compressed air generating section 11, which generates compressed air, and one end of the cylinder 111. That is, one end of the air intake passage 161 is connected to the compressed air generating section 11, and the other end is connected to one end of the cylinder 111. The compressed air generating section 11 may be equipped with a pressure valve 11a, which is used to regulate the pressure of the compressed air supplied to the interior 111a of the cylinder 111.

[0075] The exhaust flow path 162 forms a flow path connecting one end of the cylinder 111 and the outside of the cylinder 111. The outside of the cylinder 111 can be an atmospheric region.

[0076] A connecting flow path 163 may be provided between the air intake flow path 161 and the exhaust flow path 162. The connecting flow path 163 is connected to the interior 111a of the cylinder 111 and the air intake flow path 161, and is also connected to the interior 111a of the cylinder 111 and the exhaust flow path 162.

[0077] The control valve 120 can control the connection flow path 163 to selectively connect with either the intake flow path 161 or the exhaust flow path 162. That is, the control valve 120 can be configured to close the connection between the connection flow path 163 and the exhaust flow path 162 when the connection flow path 163 is connected to the intake flow path 161. Conversely, the control valve 120 can be configured to close the connection between the connection flow path 163 and the intake flow path 161 when the connection flow path 163 is connected to the exhaust flow path 162.

[0078] The control valve unit 120 can perform opening and closing operations on the intake air passage 161 and the exhaust air passage 162 depending on whether the power is on. For example, the control valve unit 120 can be configured to connect the intake air passage 161 and the connecting passage 163 when the power is on, and connect the exhaust air passage 162 and the connecting passage 163 when the power is off.

[0079] The pressurizing section 130 has a pressurizing member 131 facing an opening formed at the other end of the cylinder 111. The pressurizing section 130 may have a pressurizing cover 132 surrounding at least a portion of the pressurizing member 131.

[0080] The head 140 is connected to the pressurizing part 130 and is configured to discharge the internal liquid medicine to the outside through the piston 143, which is pressurized when the hammer 113 strikes the pressurizing member 131.

[0081] The cylindrical part 110, the pressurizing part 130 and the head 140 can be formed in a way that allows them to be separated from each other, and can be provided as a disposable treatment component for diversifying injection techniques and preventing infection.

[0082] In addition, a filling portion 150 is provided between the housing 112 and the cylinder 111.

[0083] The filling section 150 is connected to the other end of the cylinder 111, and when the air intake passage 161 is opened, it forms a space for compressed air to be compressed and filled.

[0084] Furthermore, the filling portion 150 can be formed as part of the side surface surrounding the cylinder 111. For example, with Figure 2 Based on the liquid injection device 100 shown, the filling portion 150 may be formed only in the lower part of the cylinder 111, excluding the upper part of the cylinder 111. Therefore, the shape and / or arrangement of the filling portion 150 can be more diverse, thereby enabling the design of the liquid injection device 100 to be realized in more diverse forms. However, the filling portion 150 may also be formed around the entire side surface of the cylinder 111, rather than just a part of it.

[0085] Here, the hammer 113 can be formed such that when the exhaust passage 162 is opened, the compressed air that was compressed in the housing 112 when the intake passage 161 is opened is restored from one end of the cylinder 111 to the other end.

[0086] More specifically, when the hammer 113 moves from one end of the cylinder 111 to the other end by opening the air intake passage 161, if the exhaust passage 162 is opened, the hammer 113 moves from the other end of the cylinder 111 to one end by compressing and filling the compressed air in the filling section 150.

[0087] For example, when the air intake passage 161 is opened, the hammer 113 moves to the other end of the cylinder 111 and impacts the pressurizing member 131 by the compressed air supplied to one end of the cylinder 111.

[0088] Furthermore, when the hammer 113 is moved to the other end of the cylinder 111, and the exhaust passage 162 is opened, the compressed air compressed and filled in the filling part 150 can be pushed by the airflow released to the outside of the cylinder 111 through the exhaust passage 162 due to the pressure difference between the inside 111a and the outside of the cylinder 111, thereby moving to one end of the cylinder 111.

[0089] Additionally, the liquid injection device 100 may include a control unit 12, which performs control-related functions such as the control valve unit 120 and the compressed air generation unit 11. The control unit 12 may include a display module (not shown) for a user interface.

[0090] In addition, such as Figure 6 As shown, a partition 123 may be present between the other end of the cylinder 111 and the pressurizing member 131.

[0091] The partition 123 may have a connecting portion 123a.

[0092] The connecting portion 123a is formed to connect the opening formed at the other end of the cylinder 111 with the filling portion 150.

[0093] Furthermore, the connecting portion 123a of the partition 123 may have a first hole 123a1 communicating with an opening formed at the other end of the cylinder 111, and a second hole 123a2 communicating with the first hole 123a1 and the filling portion 150.

[0094] Based on the structure of the first hole 123a1 and the second hole 123a2, even without providing additional hole structures to connect the opening formed at the other end of the cylinder 111 and the filling portion 150, a flow path for the compressed air can be formed between the opening formed at the other end of the cylinder 111 and the filling portion 150, within the thickness range of the connecting portion 123a, through the first hole 123a1 and the second hole 123a2.

[0095] Additionally, the pressure member 131 is formed to face the opening formed at the other end of the cylinder 111 and impacts the hammer 113. A pressure member seal 131a for sealing the pressure member 131 may be formed on the outer peripheral surface of the pressure member 131.

[0096] Additionally, a magnetic body 112a with magnetic force may be provided on the end of the shell 112 facing the cylinder 111. Here, the hammer 113 can be connected to the magnetic body 112a by magnetic force. Thus, when the hammer 113 moves from the other end of the cylinder 111 back to one end, the hammer 113 can stably maintain its initial position after moving back to the initial position.

[0097] Furthermore, at least one of the two surfaces of the magnetic body 112a and the hammer body 113 facing each other may be provided with a hammer pad 113a, which is formed to absorb the impact when the magnetic body 112a and the hammer body 113 collide with each other.

[0098] Below, we will refer to Figures 7 to 11 Describe the operation process of the liquid jet injection device 100.

[0099] Figure 7 It is shown Figure 2 A conceptual diagram of the liquid injection device 100 before the air intake path 161 is opened. Figure 8 yes Figure 7 The diagram shows a concept of a liquid injection device 100, in which the air intake passage 161 is opened, causing the hammer 113 to move from one end of the cylinder 111 to the other end. Figure 9 yes Figure 8 The diagram shows a concept of a liquid injection device 100, in which a hammer 113 moves to the other end of a cylinder 111 and impacts a pressurizing member 131, and the pressurizing member 131 moves a certain distance due to the impact. Figure 10 yes Figure 9 The diagram shows a concept of a liquid injection device 100, which illustrates how, after the hammer 113 impacts the pressurizing member 131, the exhaust passage 162 is opened, causing the hammer 113 to move toward one end of the cylinder 111. Figure 11 yes Figure 10 The diagram shows a concept of a liquid injection device 100, illustrating the state in which the hammer 113 moves to one end of the cylinder 111 and returns to its initial position.

[0100] Reference Figures 7 to 11 Compressed air generated in the compressed air generating section 11 is supplied to the interior 111a of the cylinder 111, and the pressure generated by the compressed air supplied to the interior 111a of the cylinder 111 causes the hammer 113 to move forward. Thus, pressure energy is converted into kinetic energy for the first time. This kinetic energy is then converted into impact energy a second time through the impact of the hammer 113 against the pressurizing member 131. The impact energy generated by the impact of the pressurizing member 131 against the piston 143 is then converted back into kinetic energy a third time. As the liquid medicine filled inside the head 140 is pressurized, it is discharged through the outlet chamber 145. Subsequently, as the exhaust passage 162 is opened, the hammer 113 returns to its initial position due to the force of the compressed air in the filling section 150 attempting to be released through the exhaust passage 162.

[0101] More specifically, first refer to Figure 7 In the initial state of the liquid injection device 100, such as Figure 8 As shown, when the air intake passage 161 is opened by the control valve section 120, compressed air generated by the compressed air generating section 11 is supplied to the interior 111a of the cylinder 111 through the air intake passage 161. Furthermore, the compressed air supplied to the interior 111a of the cylinder 111 causes the hammer 113 to move from one end of the cylinder 111 to the other end. At this time, the compressed air is compressed and filled into the filling section 150 formed between the cylinder 111 and the housing 112.

[0102] Next, refer to Figure 9 The hammer 113 moves to the other end of the cylinder 111 by compressed air and impacts the pressurizing member 131. The impact energy of the hammer 113 and the pressurizing member 131 is transmitted to the piston 143, thereby pushing the piston 143. At this time, the piston 143, which has absorbed the impact energy, is converted into high-speed micro-motion by the elastic support member 144, thereby pressurizing and pushing the liquid medicine in the head 140 in the direction of the oral cavity chamber 145. Subsequently, the liquid medicine discharge valve 145b is pressurized and opened, and the liquid medicine in the head 140 is discharged to the outside through the oral cavity chamber 145.

[0103] Next, refer to Figure 10After the piston 143 finishes pressurizing, a negative pressure is generated inside the head 140. The medicine inlet valve 141c, located between the feeder section 142 (connected to an external medicine storage device (not shown)) and the inside of the head 140, is opened, allowing the medicine to be filled through the pressure difference between the inside and outside of the head 140. After filling is complete, the negative pressure inside the head 140 is eliminated, and the medicine inlet valve 141c automatically closes. Simultaneously, the medicine outlet valve 145b closes, preventing the backflow of medicine discharged through the outlet chamber 145 of the head 140 and blood from the wound.

[0104] In addition, such as Figure 10 As shown, the return of the hammer 113 to its initial position is achieved by the force of compressed air in the filling section 150 formed between the cylinder 111 and the housing 112 attempting to be released through the exhaust passage 162, which pushes the hammer 113. Furthermore, the return of the hammer 113 to its initial position can also be achieved in part by the impact reaction force generated after the hammer 113 strikes the pressurizing member 131.

[0105] Finally, as Figure 11 As shown, the hammer 113 can return to its initial position and can be stably maintained in the state of moving to the initial position by means of a magnetic body 112a arranged at one end facing the cylinder 111.

[0106] The above description is merely illustrative, and those skilled in the art can make various modifications without departing from the scope and spirit of the described embodiments. The above embodiments can be implemented individually or in any combination.

Claims

1. A head for a handle, comprising: The inlet chamber part is connected to the handle body and has a liquid filling space inside; The feeder part is connected to the inlet chamber and is configured to inject liquid medicine into the liquid medicine filling space. A piston is installed inside the inlet chamber and is configured to push the liquid filling the liquid filling space when it is pressurized by an external force. An elastic support member is formed to elastically support the piston; and The outlet chamber part is connected to the inlet chamber part and is configured to discharge the medication under pressure via the piston. The end of the piston defines a portion of the liquid filling space.

2. The handle head according to claim 1, wherein, The end of the piston is in contact with the liquid filling the liquid filling space.

3. The handle head according to claim 2, wherein, The oral cavity includes: The main body of the exit chamber, the main body of the inlet chamber connected to the inlet chamber, and having a drug discharge valve mounting groove and a drug discharge outlet communicating with the drug discharge valve mounting groove; and A liquid medicine discharge valve is installed in the liquid medicine discharge valve mounting slot. The liquid discharge valve is in contact with the liquid filling space.

4. The handle head according to claim 3, wherein, The liquid discharge valve is arranged such that it is spaced apart from the end of the liquid filling space that faces the piston.

5. The handle head according to claim 2, wherein, The inlet chamber includes: The oral cavity body is detachably formed on the handle body and has a piston mounting groove and a drug injection valve mounting groove respectively communicating with the drug filling space at different positions; and A medicine inlet valve is installed in the medicine inlet valve mounting slot. The feeder is arranged to correspond to the liquid medicine injection valve.

6. The handle head according to claim 5, wherein, The piston includes: The piston head is formed to be exposed to the outside of the inlet chamber and to withstand external forces; A piston rod, extending from the piston head, having its end defining the liquid filling space, and having at least one O-ring groove; and An O-ring is installed in the O-ring groove.

7. The handle head according to claim 6, wherein, The elastic support member is formed around the piston rod and is supported by the piston head and the piston mounting groove facing each other.

8. The handle head according to claim 7, wherein, The elastic support member is annular with a hollow portion, wherein the piston rod is housed in the hollow portion.

9. A liquid jet injection device, comprising: handle body; as well as The handle head according to any one of claims 1 to 8 is connected to the handle body; The handle body includes: The cylindrical section includes a cylindrical body, a shell surrounding the cylindrical body, and a hammer housed inside the cylindrical body and configured to move between one end and the other end of the cylindrical body. A control valve section is configured to selectively open and close an intake air passage and an exhaust air passage. The intake air passage connects a compressed air generating section that generates compressed air to be supplied to the interior of the cylinder to one end of the cylinder. The exhaust air passage connects one end of the cylinder to the outside. The pressurizing section has a pressurizing member opposite to the opening formed at the other end of the cylinder, and is connected to the inlet chamber. When the hammer strikes the pressurizing member, the pressurizing member pressurizes the piston.

10. The liquid jet injection device according to claim 9, wherein, A filling section is provided between the housing and the cylinder, the filling section is connected to the other end of the cylinder, and when the air inlet passage is opened, the compressed air is compressed and fills the filling section. The hammer is configured such that, when the intake air passage is opened and the hammer moves from one end of the cylinder to the other end, when the exhaust air passage is opened, the hammer moves from the other end of the cylinder to one end by compressing and filling the compressed air in the filling section.

Images