An injection device applicable to a needleless syringe

Abstract

The present invention discloses an injection device applicable to a needleless syringe, comprising: an injection mechanism and a control mechanism disposed inside the injection mechanism. The control mechanism controls the injection mechanism to suck the medicine to be injected from an ampoule bottle into the injection mechanism. Then, the control mechanism detects the skin through infrared rays to detect the specific position of blood vessels. After the detection is completed, the control mechanism selects a corresponding liquid outlet channel to perform an injection operation.

Description

Technical Field

[0001] The present invention relates to the field of drug usage methods, and particularly to an injection device suitable for a needleless syringe. Background Art

[0002] Needleless injection is an injection method without a traditional capillary needle. It does not require piercing the flesh with a needle. Instead, a needleless injection pusher generates a certain pressure through a ring compression spring system with stable mechanical properties. Under the action of the pressure, the liquid medicine is pushed and diffused into the subcutaneous tissue of the patient. Therefore, it will also reduce the pain and fear of needle pricks for patients to a certain extent.

[0003] In the prior art, a needleless injection device with an outer shell and an inner shell in 201280038600.6 also includes a start button and a housing lock. Among them, the start button is operatively associated with the inner shell and the outer shell, and the housing lock is engaged by the start button to prevent the inner shell from moving from the syringe loading position to the injection position when the start button is activated with the inner shell in the syringe loading position.

[0004] In the prior art, most use a hammer to strike and utilize the contractility of a spring to launch the drug. However, this spring has a certain fatigue life, and especially in the case of long-term operation requiring high-speed resilience, it will easily cause mechanical damage to the spring, resulting in equipment damage. Summary of the Invention

[0005] The present invention overcomes the deficiencies of the prior art and provides an injection device suitable for a needleless syringe. The technical problems to be solved include: the source of the inventive concept.

[0006] To achieve the above object, the technical solution adopted by the present invention is: an injection device suitable for a needleless syringe, including: an injection mechanism and a control mechanism disposed inside the injection mechanism.

[0007] The injection mechanism includes an injection housing. A power supply chamber and an injection chamber are provided inside the injection housing. Guide rails are provided on both sides of the inner wall of the injection chamber. An armature is fixedly connected between the guide rails. A push plate is slidably connected inside the injection chamber. A liquid inlet hole is provided on the injection chamber.

[0008] The control mechanism includes a microfluidic chip. The microfluidic chip is disposed at the front end of the injection chamber. The microfluidic chip is divided into upper and lower sides. The bottom layer of the microfluidic chip is a control layer, and the top layer of the microfluidic chip is a liquid layer. An electromagnet is provided on one side of the microfluidic chip adjacent to the injection chamber.

[0009] In a preferred embodiment of the present invention, multiple layers of sealing strips are provided on the circumference of the push plate, and the push plate isolates the injection chamber into two chambers.

[0010] In a preferred embodiment of the present invention, a power source is disposed in the power chamber, and the power source is connected in series with the guide rail, so that the power source, the guide rail, and the armature form a closed loop.

[0011] In a preferred embodiment of the present invention, the liquid inlet hole is disposed at the foremost end of the injection chamber. A miniature one-way valve is fixedly connected to the bottom of the liquid inlet hole. The one-way valve controls the liquid to only enter and not exit at this position. A thimble is fixedly connected to the liquid inlet hole of the one-way valve. The inside of the thimble is hollow, and the outside of the thimble is arranged in an irregular polygonal shape.

[0012] In a preferred embodiment of the present invention, the microfluidic chip is disposed at the front end of the injection chamber. A plurality of liquid inlet channels, liquid outlet channels, and a through channel penetrating the liquid inlet channels and the liquid outlet channels are uniformly etched on the liquid layer.

[0013] In a preferred embodiment of the present invention, the liquid inlet channels are all arranged in a U shape. The liquid outlet channels are symmetrically arranged with respect to the through channel and are arranged in a staggered manner. An ion polymer gel is disposed at the front end of the liquid outlet channels.

[0014] In a preferred embodiment of the present invention, a groove is formed at the bottom of the end of the injection chamber, and an ion polymer gel is disposed in the groove.

[0015] In a preferred embodiment of the present invention, a miniature infrared transmitting and receiving mechanism is disposed at one end of the injection outside the injection mechanism, and a glass cover is disposed outside the infrared transmitting and receiving mechanism.

[0016] In a preferred embodiment of the present invention, a control module, an infrared transmitting and receiving module, and a signal processing module are integrated on the control layer. The control module is electrically connected to the ion polymer gel, the power source, etc. respectively.

[0017] The present invention solves the defects existing in the background technology, and the present invention has the following beneficial effects:

[0018] (1) By using the method of electromagnetic induction, the present invention instantaneously generates a powerful thrust on the push plate to complete the injection operation, effectively avoiding the situation of equipment damage caused by the fatigue of mechanical parts.

[0019] (2) By energizing the guide rail, the present invention generates a strong magnetic field. In the strong magnetic field, the orientation degree of the magnetic dipole of the drug changes according to the orientation of the strong magnetic field, changing from disorder to order, so that when performing drug injection, it is faster at the molecular level.

[0020] (3) By providing microfluidic channels and infrared detection on the microfluidic chip, the present invention enables the device to identify blood vessels, so that the drug can be accurately injected into the corresponding position. Brief Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0022] Figure 1 is a three-dimensional structure diagram of a preferred embodiment of the present invention;

[0023] Figure 2 is a schematic cross-sectional structure diagram of an injection mechanism of a preferred embodiment of the present invention;

[0024] Figure 3 is a schematic cross-sectional structure diagram of a liquid layer of a preferred embodiment of the present invention;

[0025] In the figure:

[0026] 1. Injection mechanism; 2. Control mechanism; 3. Injection housing; 4. Injection cavity; 5. Guide rail; 6. Armature; 7. Pusher plate; 8. Liquid inlet hole; 10. Thimble; 11. Liquid inlet channel; 12. Liquid outlet channel; 13. Through channel. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific situations.

[0031] As Figure 1 and Figure 2 shown, an injection device applicable to a needleless syringe includes: an injection mechanism 1 and a control mechanism 2 disposed inside the injection mechanism 1.

[0032] It should be noted that the control mechanism 2 controls the injection mechanism 1 to suck the medicine to be injected from an ampoule bottle into the injection mechanism 1. After that, the control mechanism 2 detects the skin through infrared rays to detect the specific position of blood vessels. After the detection is completed, the control mechanism 2 then selects the corresponding liquid outlet channel 12 for injection operation.

[0033] The injection mechanism 1 includes an injection housing 3. A power supply chamber and an injection chamber 4 are provided inside the injection housing 3. Guide rails 5 are provided on both sides of the inner wall of the injection chamber 4. An armature 6 is fixedly connected between the guide rails 5. A push plate 7 is slidably connected in the injection chamber 4. A liquid inlet hole 8 is opened on the injection chamber 4.

[0034] In a preferred embodiment of the present invention, multiple layers of sealing strips are provided on the circumference of the push plate 7, and the push plate 7 isolates the injection chamber 4 into two chambers.

[0035] In a preferred embodiment of the present invention, a power supply is provided in the power supply chamber, and the power supply is connected in series with the guide rail 5, so that the power supply, the guide rail 5, and the armature 6 form a closed loop.

[0036] It should be noted that the injection cavity 4 is in a completely sealed state inside the body, the two guide rails 5 are arranged in a parallel state, and the push plate 7 divides the injection cavity 4 into two independent cavities. After the device is started, the power supply energizes the guide rails 5. Under the action of the power supply, the two guide rails 5 and the armature 6 form a closed loop. Under the action of the power supply, the three form three strong magnetic fields, thus generating a huge electromagnetic force. First, under the action of the huge electromagnetic force, the orientation of the magnetic dipole of the drug molecules is changed, turning the originally disordered molecules into ordered ones, making it more arbitrary to eject during injection. Second, under the action of the three strong magnetic fields, the push plate 7 is subjected to a strong Ampere force, causing the push plate 7 to obtain a large acceleration to push the drug forward and eject the drug. The magnitude of the Ampere force received is where a is the width of the current-carrying thin plate, that is, the width of the guide rail 5, b is the distance between the two guide rails 5, and its speed is

[0037]

[0038] In a preferred embodiment of the present invention, the liquid inlet hole 8 is arranged at the front end of the injection cavity 4. A micro one-way valve is fixedly connected to the bottom of the liquid inlet hole 8. The one-way valve controls the liquid to only enter and not exit here. A thimble 9 is fixedly connected to the liquid inlet hole 8 of the one-way valve. The thimble 9 is in a hollow state inside, and the outer side of the thimble 9 is arranged in an irregular polygonal shape.

[0039] It should be noted that when adding medicine to this device, only need to insert the mouth of the ampoule bottle into the liquid inlet hole 8. When inserting, the thimble 9 is completely inserted into the ampoule bottle. Since there is a sealing rubber ring around the outermost side of the liquid inlet hole 8, when the ampoule bottle is inserted into the liquid inlet hole 8, the sealing rubber ring just clamps at the bottleneck of the ampoule bottle, thus safely fixing the ampoule bottle. When the push plate 7 moves away from the liquid inlet hole 8, the internal atmospheric pressure of the injection cavity 4 decreases, thus opening the one-way valve. Through the thimble 9, the medicine is sucked from the ampoule bottle into the injection cavity 4. And because the outer side of the thimble 9 is arranged in an irregular polygon, when the thimble 9 sucks the medicine into the injection cavity 4, due to the irregularity of the outer side of the thimble 9, continuous air flow will be sucked into the ampoule bottle from the unclosable gap to balance the pressure. And the length of the thimble 9 is only 3 millimeters longer than the thickness of the sealing structure on the ampoule bottle, so that the thimble 9 will only be inserted into the ampoule bottle by 3 millimeters in length, avoiding the residue of the medicine during absorption.

[0040] As Figure 3 shown, the control mechanism 2 includes a microfluidic chip. The microfluidic chip is arranged at the front end of the injection cavity 4. The microfluidic chip is divided into upper and lower sides. The bottom layer of the microfluidic chip is the control layer, and the top layer of the microfluidic chip is the liquid layer. An electromagnet is arranged on one side of the microfluidic chip adjacent to the injection cavity 4.

[0041] In a preferred embodiment of the present invention, the microfluidic chip is disposed at the front end of the injection cavity 4. A number of liquid inlet channels 11, liquid outlet channels 12 and a through channel 13 penetrating the liquid inlet channels 11 and the liquid outlet channels 12 are uniformly etched on the liquid layer.

[0042] In a preferred embodiment of the present invention, the liquid inlet channels 11 are all arranged in a U shape, the liquid outlet channels 12 are symmetrically arranged with respect to the through channel 13 and are arranged in a staggered manner, and an ion polymer gel is provided at the front end of the liquid outlet channels 12.

[0043] It should be noted that a number of channels are etched on the top layer of the microfluidic chip, including the liquid inlet channels 11, the liquid outlet channels 12 and the through channel 13. The liquid inlet channels 11 are arranged in a U shape and are arranged on the side close to the injection cavity 4. The liquid inlets and outlets of the liquid inlet channels 11 are also connected to the injection cavity 4; the through channel 13 is a straight channel, arranged in the middle of the liquid inlet channels 11, communicating with the liquid inlet channels 11, and the liquid inlet is connected to the injection cavity 4; the liquid outlet channels 12 are arranged on the side far from the injection cavity 4, the liquid outlet channels 12 are symmetrically arranged with respect to the through channel 13 and are arranged in a staggered manner, and an ion polymer gel is provided at the liquid inlets of the liquid outlet channels 12.

[0044] In a preferred embodiment of the present invention, a micro infrared emission and reception mechanism is provided at the injection end outside the injection mechanism 1, and a glass cover is provided outside the infrared emission and reception mechanism.

[0045] In a preferred embodiment of the present invention, a control module, an infrared emission and reception module and a signal processing module are integrated on the control layer, and the control module is electrically connected to the ion polymer gel, the power supply, etc. respectively.

[0046] In a preferred embodiment of the present invention, a groove is formed at the bottom of the end of the injection cavity 4, and an ion polymer gel is provided in the groove.

[0047] It should be noted that when this device is needed for intravenous injection, the blood vessel needs to be accurately found first. First, the glass cover is placed above the general blood vessel. Based on the principle that hemoglobin in human blood has a strong absorption ability for infrared light while the surrounding tissues have a weak absorption ability for infrared light, infrared light is emitted to the skin and the reflected infrared light is received and processed. Since hemoglobin in the blood has a strong absorption ability for infrared light, the reflected infrared light is weaker than the reflected infrared light at other positions, so as to judge the position of the venous blood vessel.

[0048] When the present invention is in use, when using this device, first, the drug is added. Only need to insert the mouth of the ampoule bottle into the liquid inlet hole 8. When inserting, the thimble 9 completely pierces into the ampoule bottle. Since there is a sealing rubber ring around the outermost side of the liquid inlet hole 8, when the ampoule bottle is inserted into the liquid inlet hole 8, the sealing rubber ring just clamps at the bottleneck of the ampoule bottle, thus safely fixing the ampoule bottle. When the push plate 7 moves away from the liquid inlet hole 8, the atmospheric pressure inside the injection cavity 4 decreases, thus opening the one-way valve. Through the thimble 9, the drug is sucked from the ampoule bottle into the injection cavity 4. And because the outer side of the thimble 9 is set in an irregular polygon, when the thimble 9 sucks the drug into the injection cavity 4, due to the irregularity of the outer side of the thimble 9, continuous air flow will be sucked into the ampoule bottle from the unclosed gap to balance the pressure. And the length of the thimble 9 is only 3 millimeters longer than the thickness of the sealing structure on the ampoule bottle, so that the thimble 9 will only pierce into the ampoule bottle by 3 millimeters, avoiding the residue of the drug during absorption. After that, start the switch set on the back of this device. At this time, the bottom control layer of the microfluidic chip controls the power supply set in the power supply cavity to energize the electromagnet set on the side adjacent to the injection cavity 4 of the microfluidic chip, making it generate magnetism. Since the push plate 7 is also made of magnet material and the magnetism of the two adjacent faces of the electromagnet and the push plate 7 is the same, when the electromagnet is energized, a repulsive force is generated with the push plate 7, pushing the push plate 7 to move to the end of the injection cavity 4, and at the same time sucking the drug at the liquid inlet hole 8 into the injection cavity 4.

[0049] When intravenous injection needs to be performed using this device, the blood vessel needs to be accurately found first. First, cover the glass cover above the approximate blood vessel. According to the principle that hemoglobin in human blood has a strong absorption ability for infrared light while the surrounding tissues have a weak absorption ability for infrared light, infrared light is emitted to the skin and the reflected infrared light is received and processed. Since hemoglobin in the blood has a strong absorption ability for infrared light, the reflected infrared light is weaker than the reflected infrared light at other positions, so as to judge the position of the venous blood vessel.

[0050] After the device is started, the control layer of the microfluidic chip controls the power supply to energize the guide rails 5. Under the action of the power supply, the two guide rails 5 and the armature 6 form a closed loop. Under the action of the power supply, the three form three strong magnetic fields, thus generating a huge electromagnetic force. First, under the action of the huge electromagnetic force, the orientation of the magnetic dipole of the molecules in the drug is changed, turning the originally disordered molecules into ordered ones, making it more arbitrary to eject during injection. Second, under the action of the three strong magnetic fields, the push plate 7 is subjected to a strong Ampere force, so that the push plate 7 obtains a large acceleration to push the drug forward and eject the drug. The magnitude of the Ampere force received is where a is the width of the current-carrying thin plate, that is, the width of the guide rail 5, b is the distance between the two guide rails 5, and its speed is Push the push plate 7 out at this speed. Since a strong Ampere force will be generated instantly when the guide rail 5 is electrified to push the push plate 7 to complete the injection, but once the injection is completed, the orientation of the magnetic dipole of the molecules in the drug cannot be changed. Therefore, a groove is provided at the bottom end of the injection cavity 4. An ionic polymer gel is provided in the groove. The IPMC material is light in weight and has good flexibility. It can generate a large deformation with a low voltage (<3V) and can recover the deformation after the voltage is removed. Therefore, the IPMC material is electrified before the guide rail 5 is electrified to make it expand. Then, when the guide rail 5 is electrified, after three seconds of electrifying the guide rail 5, under the action of the huge electromagnetic force, the orientation of the magnetic dipole of the drug molecules is changed, turning the originally disordered molecules into ordered ones. At this time, the voltage on the IPMC material is removed, and the IPMC material recovers its deformation.

[0051] At the same time, the push plate 7 injects. At the same time, the microfluidic chip selects the desired liquid outlet channel 12 according to the detection, and electrifies the IPMC material in other liquid outlet channels 12 to make it expand, so as to block the liquid outlet channel 12, preventing the gas from discharging from here and only allowing it to be discharged from the corresponding liquid outlet.

[0052] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. An injection device applicable to a needleless syringe, comprising: An injection mechanism and a control mechanism disposed inside the injection mechanism, characterized in that the injection mechanism includes an injection housing, a power supply chamber and an injection chamber are provided inside the injection housing, guide rails are provided on both sides of the inner wall of the injection chamber, an armature is fixedly connected between the guide rails, a push plate is slidably connected in the injection chamber, and a liquid inlet hole is opened on the injection chamber; the control mechanism includes a microfluidic chip, the microfluidic chip is disposed at the front end of the injection chamber, the microfluidic chip is divided into upper and lower sides, the bottom layer of the microfluidic chip is a control layer, the top layer of the microfluidic chip is a liquid layer, and an electromagnet is provided on one side of the microfluidic chip adjacent to the injection chamber; the microfluidic chip is disposed at the front end of the injection chamber, and a plurality of liquid inlet channels, liquid outlet channels and a through channel penetrating the liquid inlet channels and the liquid outlet channels are uniformly etched on the liquid layer; the liquid inlet channels are all arranged in a U shape, the liquid outlet channels are symmetrically arranged with respect to the through channel and are arranged in a staggered manner, and an ion polymer gel is provided at the front end of the liquid outlet channel; a groove is opened at the bottom of the end of the injection chamber, and an ion polymer gel is provided in the groove; the push plate is made of a magnet material.

2. The injection device for a needleless syringe according to claim 1, characterized in that: a plurality of layers of sealing strips are provided on the circumference of the push plate, and the push plate isolates the injection chamber into two chambers.

3. The injection device applicable to a needleless syringe according to claim 1, wherein: a power supply is provided in the power supply chamber, and the power supply is connected in series with the guide rail, so that the power supply, the guide rail and the armature form a closed loop.

4. The injection device applicable to a needleless syringe according to claim 1, characterized in that: the liquid inlet hole is provided at the front end of the injection chamber, a miniature one-way valve is fixedly connected to the bottom of the liquid inlet hole, the one-way valve controls the liquid to only enter and not exit here, a thimble is fixedly connected to the liquid inlet hole of the one-way valve, the inside of the thimble is in a hollow state, and the outside of the thimble is arranged in an irregular polygonal shape.

5. The injection device applicable to a needleless injector according to claim 1, characterized in that: a miniature infrared emission and reception mechanism is provided at one end of the injection outside the injection mechanism, and a glass cover is provided outside the miniature infrared emission and reception mechanism.

6. An injection device applicable to a needleless syringe according to claim 1, characterized in that: a control module, a miniature infrared reception and emission module and a signal processing module are integrated on the control layer, and the control module is electrically connected to the ion polymer gel and the power supply respectively.

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