CN113509615A

CN113509615A - Mechanical transmission mode of needleless injector

Info

Publication number: CN113509615A
Application number: CN202010277363.5A
Authority: CN
Inventors: 王仁臻; 王燕; 宋正起; 高雪桃; 崔庆雄; 武燕飞; 周明
Original assignee: Kunming Sangda Technology Co ltd
Current assignee: Kunming Sangda Technology Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-10-19
Anticipated expiration: 2040-04-10
Also published as: CN113509615B

Abstract

The invention discloses a mechanical transmission mode of a needleless injector, and belongs to the field of medical instruments. The voice coil motor injection device comprises a voice coil motor module, a guide module, a reading module, an injection module and a handle module; the voice coil motor module provides a power source, the guide module provides a guide effect for the voice coil motor module, the reading module measures the movement stroke of the voice coil motor module, the injection module, the guide module and the voice coil motor module jointly realize the functions of absorbing liquid medicine and removing bubbles, the liquid medicine is injected for a series of actions, and the handle module provides convenience for operators; this patent adopts voice coil motor as the power supply, can improve the controllability of injection in-process drive power, carries out the accurate mediation of dose to can carry out the injection of different doses to different crowds, the syringe has good adaptability, not only can improve injection efficiency, also facilitates for the terrorist needle crowd, reduces the stinging sense when injecting, and convenient operation is simple and direct.

Description

Mechanical transmission mode of needleless injector

Technical Field

The invention relates to a needleless injector, belongs to the field of medical instruments, and particularly relates to a mechanical transmission mode of the needleless injector.

Background

The traditional syringe with needle is used as a common administration means, and can quickly make the medicine act in the body. The medicine is convenient for patients to take medicine and apply medicine, and plays an irreplaceable role in promoting human health. However, with the continuous innovation of biomedical technology and the improvement of the medical health level of human beings, the syringe with the needle has some disadvantages in the actual use process. Such as: the phenomenon of local skin injury, bleeding, pain and the like is easily caused when the needle head enters the human tissue, and adverse conditions such as subcutaneous fat tissue nodules, muscle atrophy and the like can occur after long-term use. Most patients, especially children, are frightened, and the psychological burden is increased. The use of disposable syringes increases the cost of treatment and also generates a large amount of medical waste, which is also a major threat to environmental health. Improper needle management and improper use can cause cross-infection and may also lead to the spread of infectious diseases. Medical care personnel can use the medical care personnel clinically only after formal training, otherwise improper operation can cause puncture accidents.

In order to overcome the defects of the injector with the needle, the invention provides the needleless injector which can directly enter the human tissues without the help of the needle. The injection dose and the injection depth of the needle-free injector in the current market are uncontrollable, so that the application range has certain limitation. Especially, the insulin needleless injector can only inject the fixed dose to the fixed depth, which brings inconvenience to the patient and the medical staff.

Disclosure of Invention

The invention aims to overcome the defects of a power source and improve the controllability of the driving force in the injection process so as to realize effective control on a jet flow speed-time curve.

In order to achieve the purpose, the invention adopts the technical scheme that: the electromagnetic force generated by the voice coil motor is used as a power source of the needleless injector, and the mechanical transmission device of the needleless injector comprises a voice coil motor module, a guide module, a reading module, an injection module and a handle module; the voice coil motor module comprises a stator fixing plate, a voice coil motor stator, a voice coil motor rotor, a pull rod, a handle connecting piece and a guide piece; the guide module comprises a pressing sheet, a push rod shaft, a guide shaft, a linear bearing, a clamp spring, a linear T-shaped short bearing and a sleeve; the reading module includes magnetic scale groove, magnetic stripe, protection steel band, displacement sensor, magnetic fence fixing base, fixed slot support, reading headstock, the injection module includes ampoule fixing base, ampoule adaptor, ampoule piston, ampoule, the handle module includes handle, apron.

The stator fixing plate is punched to fix the voice coil motor stator; the bottom surface of the voice coil motor stator is tightly attached to the stator fixing plate and fixed through demagnetizing countersunk head screws. The rotor of the voice coil motor is fixedly connected with the push rod shaft through a pressing sheet and a screw; the push rod shaft borne by the linear bearing can enable the voice coil motor rotor to be suspended, and the guide shafts penetrate through the linear T-shaped short bearings and are distributed on two sides of the push rod shaft, so that the voice coil motor rotor is overlapped with the stator axis of the voice coil motor, a favorable gap is generated, and friction loss force is prevented from being generated during movement; when the voice coil motor is electrified to generate electromagnetic force, the rotor of the voice coil motor drives the push rod shaft to move together, the transmitted force acts on the ampoule piston, the push rod shaft is inserted into the ampoule piston to be clamped, and the ampoule piston follows along with the action of the voice coil motor to suck liquid medicine and remove bubbles; when the operations of sucking the liquid medicine and removing bubbles are completed, the voice coil motor moves to a corresponding position, at the moment, the voice coil motor is endowed with a force to push the push rod shaft at a high speed to drive the ampoule piston to move, so that the liquid medicine is pushed to be sprayed into the tiny micropores of the ampoule bottle and injected into the skin.

Preferably, the stator fixing plate is connected with the handle connector, and the outer cylindrical surface of the stator fixing plate is milled to be a plane coincident with the plane of the handle connector.

Preferably, the handle connecting piece is provided with long holes at two sides, so that the handle module can be adjusted along with the adjustment of the gravity center position of the injector, and is convenient for an operator to hold.

Preferably, the sleeve is connected with the handle connecting piece, the outer cylindrical surface of the sleeve is milled into a plane which is coincident with the plane of the handle connecting piece, the two sides of the sleeve are provided with process grooves for installing the snap springs, the snap springs are convenient to install and disassemble, the right side of the sleeve is provided with a groove, when the linear T-shaped short bearing is installed, the linear T-shaped short bearing can be prevented from being impacted in the tabletting movement process, the outer cylindrical surface of the center of the sleeve is milled into a plane, and the milled plane is provided with a through hole for providing a channel for the magnetic scale to move.

Preferably, the fixing groove support is provided with a groove.

Preferably, the push rod shaft and the guide shaft are arranged in a triangular shape.

Preferably, the outer cylindrical surface of the reading head seat is milled into a plane.

Preferably, the outer cylindrical surface of the ampoule fixing seat is milled into a plane, and is overlapped with the milled plane of the reading head seat, and the ampoule fixing seat is fixedly connected with the reading head seat.

Preferably, the big end face of the ampoule adaptor is provided with an installation process hole.

Preferably, the handle and the cover plate are arranged at an inclined angle, and the edge on the handle is chamfered, so that an operator can hold the handle conveniently.

The invention does not need to use a needle head during injection, and the medicine directly enters human tissues, thereby solving the problems of infection, tissue injury, bleeding, pain and the like caused by the fact that the needle head penetrates into the human body during the traditional injection, increasing the psychological pressure of a patient, leading the distribution of the injected medicine in the human tissues to be dispersion, being beneficial to medicine absorption, being convenient and simple to operate, being capable of being used in any place, reducing the cost of medical waste treatment, improving the controllability of driving force during the injection process, carrying out accurate adjustment on the dosage, and carrying out injection with different dosages for different people.

Drawings

FIG. 1 is a schematic diagram of a voice coil motor module according to the present invention;

FIG. 2 is a schematic view of the construction of the guide module of the present invention;

FIG. 3 is a schematic diagram of the reading module structure of the present invention;

FIG. 4 is a schematic view of the injection module configuration of the present invention;

FIG. 5 is a schematic view of the overall structure of the present invention;

fig. 6 is a schematic sectional view of the overall structure of the present invention.

The figure shows that: the voice coil motor comprises a voice coil motor module 1, a stator fixing plate 2, a voice coil motor stator 3, a voice coil motor rotor 4, a pull rod 5, a handle connecting piece 6, a guide piece 7, a guide module 8, a pressing piece 9, a push rod shaft 10, a guide shaft 11, a linear bearing 12, a clamp spring 13, a linear T-shaped short bearing 14, a sleeve 15, a reading module 16, a magnetic ruler groove 17, a magnetic stripe 18, a protective steel belt 19, a displacement sensor 20, a magnetic fence fixing seat 21, a fixing groove support 22, a reading head seat 23, an injection module 24, an ampoule fixing seat 25, an ampoule adaptor 26, an ampoule piston 27, an ampoule bottle 28, a handle module 29, a handle 30 and a cover plate 31.

Detailed description of the preferred embodiments

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixedly connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The electromagnetic force generated by the voice coil motor is used as the power source of the needleless injector, and the mechanical transmission device of the needleless injector comprises a voice coil motor module 1, a guide module 8, a reading module 16, an injection module 24 and a handle module 29; the voice coil motor module 1 comprises a stator fixing plate 2, a voice coil motor stator 3, a voice coil motor rotor 4, a pull rod 5, a handle connecting piece 6 and a guide piece 7; the guide module 8 comprises a pressing sheet 9, a push rod shaft 10, a guide shaft 11, a linear bearing 12, a clamp spring 13, a linear T-shaped short bearing 14 and a sleeve 15; the reading module 16 comprises a magnetic ruler groove 17, a magnetic stripe 18, a protective steel belt 19, a displacement sensor 20, a magnetic fence fixing seat 21, a fixing groove support 22 and a reading head seat 23, the injection module 24 comprises an ampoule fixing seat 25, an ampoule adaptor 26, an ampoule piston 27 and an ampoule bottle 28, and the handle module 29 comprises a handle 30 and a cover plate 31.

The stator fixing plate 2 is punched to fix the voice coil motor stator 3; the bottom surface of the voice coil motor stator 3 is tightly attached to the stator fixing plate 2 and fixed by a demagnetizing countersunk head screw. The rotor 4 of the voice coil motor is fixedly connected with the push rod shaft 10 through a pressing sheet 9 and a screw; the push rod shaft 10 borne by the linear bearing 12 can suspend the voice coil motor mover 4 in the air, the guide shaft 11 passes through a central hole of the linear T-shaped short bearing 14, and the linear T-shaped short bearings 14 are distributed at the lower two sides of the push rod shaft 10, so that the voice coil motor mover 4 is overlapped with the axis of the voice coil motor stator 3, a favorable gap is generated, and the friction loss force is prevented from being generated during movement; when the voice coil motor is electrified to generate electromagnetic force, the voice coil motor rotor 4 drives the push rod shaft 10 to move together, the transmitted force acts on the ampoule piston 27, the push rod shaft 10 is inserted into the ampoule piston 27 to be clamped, and the ampoule piston 27 follows along with the action of the voice coil motor to suck liquid medicine and remove bubbles; when the operations of sucking the liquid medicine and removing bubbles are completed, the voice coil motor moves to a corresponding position, at the moment, the voice coil motor is endowed with a force to push the push rod shaft 10 at a higher speed to drive the ampoule piston 27 to move, so that the liquid medicine is pushed to be sprayed from the tiny micropores of the ampoule bottle 28 and injected into the skin.

The stator fixing plate 2 is punched to fix the voice coil motor stator 3; 3 bottom surfaces of voice coil motor stator are hugged closely stator fixed plate 2 passes the demagnetization grub screw stator fixed plate 2 to screw up and be in the screwed hole that 3 bottom surfaces of voice coil motor stator correspond. The pull rod 5 is perpendicular to the stator fixing plate 2 and evenly distributed around the voice coil motor stator 3, the surface of the pull rod 5 is tightly attached to the surface of the stator fixing plate 2, and a screw penetrates through the stator fixing plate 2 and is screwed in a threaded hole corresponding to the pull rod 5. The guide piece 7 is used for connecting the pull rod 5, the surface of the other side of the pull rod 5 is tightly attached to the surface of the guide piece 7, a screw penetrates through the guide piece 7 and is screwed in a threaded hole corresponding to the pull rod 5, a groove is formed in the cylindrical plane of the guide piece 7, the rotor coil of the voice coil motor is prevented from being cut when moving, the two ends of the pull rod 5 are respectively connected with the stator fixing plate 2 and the guide piece 7, and the two ends of the pull rod 5 can be replaced at will to connect the two structural parts.

The push rod shaft 10 is a stepped shaft, a first section of shaft from the right is matched with a hole in the top end of the rotor 4 of the voice coil motor, the diameter of a second section of shaft is larger than that of a central hole in the pressing sheet 9, the thickness of the second section of shaft is the same as that of two symmetrical counter bore bosses on the pressing sheet 9, and a third section of shaft is used for installing the linear bearing 12.

Push rod shaft 10 rises the first section axle in the right side and inserts the downthehole of 4 top central points of voice coil motor active cell put, make this one side the shaft shoulder with 4 top surfaces of voice coil motor active cell hug closely together, will the unthreaded hole of preforming 9 central points puts is followed the other end of push rod shaft 10 penetrates, and with the parallel laminating of the shaft shoulder of push rod shaft 10 opposite side, utilize the method of shaft shoulder location, pass two demagnetization screws the counter bore boss of preforming 9 to screw up in the corresponding screwed hole in 4 tops of voice coil motor active cell, make push rod shaft 10 with voice coil motor active cell 4 links firmly together.

One side of the guide shaft 11 with the threaded end is screwed into a corresponding threaded hole boss on the pressing sheet 9, and the threaded end face of the guide shaft 11 is overlapped with the corresponding threaded hole boss on the pressing sheet 9. The corresponding threaded holes on the pressing sheet 9 are distributed on the lower two sides of the unthreaded hole in the center of the pressing sheet 9.

Sleeve 15 is the T shape, sleeve 15 center cylinder hole installation linear bearing 12, linear bearing 12 inserts sleeve 15 center cylinder hole will jump ring 13 is embedded into the ladder inslot at linear bearing 12 both ends prevents linear bearing 12 axial motion. The holes of the sleeve 15 for mounting the linear T-shaped short bearing 14 are distributed at the lower two sides of the central cylindrical hole of the sleeve 15, the holes of the sleeve 15 and the hole are distributed in a triangular shape, the linear T-shaped short bearing 14 penetrates through the corresponding hole on the sleeve 15, the surface of one side of the linear T-shaped short bearing 14 is tightly attached to the surface of the groove of the sleeve 15, a screw penetrates through the counter bore boss of the linear T-shaped short bearing 14 and is screwed in the threaded hole corresponding to the groove of the sleeve 15, and the linear T-shaped short bearing 14 is fixedly connected with the sleeve 15. The sleeve 15 on which the linear bearing 12 and the linear T-shaped short bearing 14 are mounted penetrates through the push rod shaft 10 corresponding to the hole of the linear bearing 12 and the guide shaft 11 corresponding to the hole of the linear T-shaped short bearing 14, so that the sleeve 15 and the guide member 7 are in surface-to-surface fit, and a screw penetrates through the guide member 7 and is screwed in a threaded hole corresponding to the sleeve 15.

The magnetic tape groove 17 is used for installing the magnetic tape 18, the magnetic tape 18 is tightly attached to the magnetic tape groove 17, the magnetic tape 18 is pressed and fixed by the protective steel belt 19, the magnetic tape groove 17 where the magnetic tape 18 and the protective steel belt 19 are installed penetrates through a square hole corresponding to the sleeve 15, one end of the magnetic tape groove 17 is embedded into a groove of a boss of the pressing sheet 9, a screw penetrates through the protective steel belt 19 and the magnetic tape groove 17 and is screwed in a threaded hole corresponding to the boss of the pressing sheet 9, the fixed groove support 22 penetrates through the push rod shaft 10, a screw penetrates through a threaded hole in the fixed groove support 22 and is screwed and fixed on the push rod shaft 10 and is used for supporting the magnetic tape groove 17, and a screw penetrates through the protective steel belt 19 and the magnetic tape groove 17 and is screwed in a threaded hole in the fixed groove support 22.

The reading head seat 23 is matched with the sleeve 15, the milled plane of the reading head seat 23 is parallel to the milled plane of the sleeve 15, and a screw is threaded through the reading head seat 23 and screwed into a corresponding threaded hole of the sleeve 15 for screwing. The displacement sensor 20 is fixed in the magnetic gate fixing seat 21, the upper plane of the displacement sensor 20 is tightly attached to the inner plane of the magnetic gate fixing seat 21, the lower plane of the magnetic gate fixing seat 21 is tightly attached to the reading head seat 23 to be milled, a screw penetrates through the magnetic gate fixing seat 21 and is screwed into a threaded hole corresponding to the reading head seat 23 to be screwed, and the displacement sensor 20 is used for measuring the walking path of the voice coil motor mover 4.

Ampoule fixing base 25 with reading headstock 23 threaded connection, ampoule fixing base 25 by the milling plane with reading headstock 23 is by the milling plane coincidence, interior external screw thread is attacked to ampoule adaptor 26, the external screw thread with ampoule fixing base 25 cooperation is connected, the internal thread with 28 cooperations of ampoule are connected, make 28 protruding mesa of ampoule with 26 planes are hugged closely.

The handle connecting piece 6 is connected with the stator fixing plate 2 and the sleeve 15, the length of the handle connecting piece is equal to that of the pull rod 5, the upper plane of the handle module 29 is tightly attached to the inner plane of the handle connecting piece 6, a screw penetrates through the handle connecting piece 6 and is screwed into a threaded hole corresponding to the handle to be screwed, and the handle connecting piece 6 is provided with a long hole, so that the handle module 29 can be adjusted along with the adjustment of the gravity center position of the injector, and an operator can conveniently hold the handle.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A mechanical transmission mode of a needleless injector is characterized by comprising a voice coil motor module (1), a guide module (8), a reading module (16), an injection module (24) and a handle module (29);

the voice coil motor module (1) comprises a stator fixing plate (2), a voice coil motor stator (3), a voice coil motor rotor (4), a pull rod (5), a handle connecting piece (6) and a guide piece (7); the voice coil motor stator (3) is fixed with the stator fixing plate (2), the pull rods (5) are distributed around the voice coil motor stator (3) and are perpendicular to the stator fixing plate (2) and fixedly connected together, the handle connecting piece (6) is placed perpendicular to the stator fixing plate (2) and fixedly connected together, and the guide piece (7) is fixedly connected with the pull rods (5) and the handle connecting piece (6);

the guide module (8) comprises a pressing sheet (9), a push rod shaft (10), a guide shaft (11), a linear bearing (12), a clamp spring (13), a linear T-shaped short bearing (14) and a sleeve (15), a first section shaft from the right of the push rod shaft (10) is inserted into a central hole at the top end of the voice coil motor rotor (4), a counter bore boss on the pressing sheet (9) is equal to a second section shaft from the right of the push rod shaft (10), a light hole at the central position of the pressing sheet (9) penetrates from the other end of the push rod shaft (10), so that the push rod shaft (10) is fixedly connected with the voice coil motor rotor (4), one side of the guide shaft (11) with a threaded end is screwed into a corresponding threaded hole boss on the pressing sheet (9), and the threaded end face of the guide shaft (11) is coincided with a corresponding threaded hole boss face on the pressing sheet (9), the corresponding threaded hole bosses on the pressing sheet (9) are distributed on the lower two sides of a unthreaded hole in the central position of the pressing sheet (9), the thickness of the threaded hole bosses on the pressing sheet (9) is smaller than that of a second section shaft from the right of the push rod shaft (10), the sleeve (15) is in a T shape, the linear bearing (12) is inserted into a central cylindrical hole of the sleeve (15), the snap springs (13) are embedded into stepped grooves at the two ends of the linear bearing (12) to prevent the linear bearing (12) from axially moving, holes for mounting the linear T-shaped short bearing (14) on the sleeve (15) are distributed on the lower two sides of the central cylindrical hole of the sleeve (15), the holes of the two are distributed in a triangular shape, the linear T-shaped short bearing (14) penetrates through the corresponding hole on the sleeve (15), so that the linear T-shaped short bearing (14) is fixedly connected with the sleeve (15), the sleeve (15) is fixedly connected with the guide piece (7);

the reading module (16) comprises a magnetic scale groove (17), a magnetic strip (18), a protective steel strip (19), a displacement sensor (20), a magnetic grid fixing seat (21), a fixed groove support (22) and a reading head seat (23), the magnetic strip (18) is tightly attached to the magnetic scale groove (17), the magnetic strip (18) is pressed and fixed by the protective steel strip (19), the magnetic scale groove (17) penetrates through a square hole corresponding to the sleeve (15), one end of the magnetic scale groove is embedded into a groove of a boss of the pressing sheet (9), the pressing sheet (9) is fixed with the magnetic scale groove (17), the fixed groove support (22) penetrates through the push rod shaft (10), the fixed groove support (22) is fixed on the push rod shaft (10) and used for supporting and fixing the magnetic scale groove (17), the reading head seat (23) is matched with the sleeve (15), the reading head seat (23) is parallel to the milling plane of the sleeve (15), the reading head seat (23) is fixedly connected with the sleeve (15), the displacement sensor (20) is fixed in the magnetic grid fixing seat (21), and the magnetic grid fixing seat (21) is installed on a milled plane of the reading head seat (23); the injection module (24) comprises an ampoule fixing seat (25), an ampoule adaptor (26), an ampoule piston (27) and an ampoule bottle (28), wherein the ampoule fixing seat (25) is fixedly connected with the reading head seat (23), the ampoule adaptor (26) taps internal and external threads, the external threads are matched and connected with the ampoule fixing seat (25), and the internal threads are matched and connected with the ampoule bottle (28), so that a convex table surface of the ampoule bottle (28) is tightly attached to the plane of the ampoule adaptor (26);

the handle module (29) comprises a handle (30) and a cover plate (31), the cover plate (31) is embedded into the handle (30) and fixedly connected together, and the handle (30) is fixedly connected with the handle connecting piece (6).

2. A mechanical transmission of a needleless injector according to claim 1, characterized in that one side of the cylindrical surface of the stator holder (2) is milled into a plane, the plane of one side of the stator holder (2) has a weight-removing slot, the pull rod (5) can be installed at any position, one side of the cylindrical surface of the guide (7) is milled into a plane, the cylindrical plane of the guide (7) has a slot, the handle connector (6) has long holes on both sides, and the adjustment of the handle module (29) can be performed according to the gravity center of the injector.

3. The needle-free injector mechanical transmission mode according to claim 1, wherein the diameter of the second section shaft from the right of the push rod shaft (10) is larger than the diameter of the central hole of the pressing sheet (9) and is also larger than the diameter of the central hole at the top end of the voice coil motor rotor (4).

4. The needle-free injector mechanical transmission mode according to claim 1, wherein an outer cylindrical surface of the ampoule fixing seat (25) is milled into a plane, the plane is overlapped with the milled plane of the reading head seat (23), and a mounting process hole is formed in a large end face of the ampoule adaptor (26).

5. A mechanical transmission of a needleless injector according to claim 1, characterized in that the handle (30) and the cover plate (31) are mounted at an oblique angle, and the edges of the handle (30) are chamfered.