Veterinary electric needleless injector

Abstract

The utility model discloses an electric needleless injector for livestock. The electric needleless injector comprises a shell, a battery, a nozzle assembly, a liquid inlet pipe assembly, a liquid storage cavity, an adapter block, a motor, a rotating worm, a worm position measuring plate, a compression spring, a spring connecting rod, a piston fixing rod, a transmission bearing, a spring pressing plate, a buffering rubber mat, a liquid medicine push rod and a Hall sensor. The utility model provides three more optimized functional structures: (1) the trigger device is simpler and more practical: the trigger device can be triggered by only pressing the head, the trigger device can be pressed on an animal body when in use, and liquid flying caused by the fact that the trigger device is not attached to the epidermis can be prevented; (2) the liquid medicine, the medicine bottle and the like are more convenient to replace: the Luer taper of the medicine bag is directly sleeved during use, or the medicine tube is directly sleeved on the Luer taper when the self-made medicine bottle and the medicine cylinder are used; and (3) the power structure is more stable and simpler: the motor drives the worm to rotate and then drives the straight connecting rod to operate.

Description

Technical Field

[0001] This utility model relates to the field of veterinary medical devices, specifically to a veterinary electric needleless injector. Background Technology

[0002] A needle-free injector is a veterinary medical device used to replace injection needles, thereby saving needle costs, reducing injection time and difficulty, and preventing cross-infection.

[0003] This device uses pneumatic, hydraulic, or electric methods to spray the internal liquid medicine through tiny nozzles, forming a high-speed, high-pressure jet stream that allows the liquid medicine to penetrate thick epidermis and reach the desired locations such as subcutaneous or intradermal areas for release.

[0004] Current needle-free injectors are available in pneumatic and electric types. The disadvantages of pneumatic injectors are that they require an additional air tank or air pump, making them inconvenient to carry and costing more. Electric injectors mostly use spring compression and release to provide power, but the spring compression method is relatively cumbersome and the power structure is complex.

[0005] There are also problems such as inconvenient triggering devices and difficulty in changing medications (e.g., changing medicine bottles, changing needles, etc.). Utility Model Content

[0006] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a veterinary electric needleless injector to solve the technical defects of existing electric needleless injectors, such as cumbersome power structure, complicated spring compression method, difficulty in changing medication, and inconvenient triggering device.

[0007] To solve the above-mentioned technical problems, this utility model is implemented as follows: A veterinary electric needleless injector is constructed, comprising a shell, a battery, a nozzle assembly, an inlet tube assembly, a reservoir, an adapter block, a motor, a rotating worm gear, a worm gear positioning plate, a compression spring, a spring connecting rod, a piston fixing rod, a transmission bearing, a spring pressure plate, a buffer pad, a medication push rod, and a Hall sensor. The nozzle assembly includes a nozzle, a nozzle sleeve, a nozzle sleeve spring, a nozzle base, a sealing tube, an anti-reverse steel ball A, and a small spring A. The inlet tube assembly includes an external Luer connector, an anti-reverse steel ball B, and a small spring B. The nozzle assembly is installed at the front end of the reservoir. A connecting channel exists between the adapter block and the reservoir, connecting externally to the Luer connector, and then through the medication push rod to the nozzle. The only two outlets of this channel are the Luer connector and the nozzle. When the spring is compressed, causing the liquid push rod to move backward, the steel balls inside the sealing tube are pressed tightly against the inclined surface due to the spring and internal pressure, resulting in a seal. The steel balls inside the adapter block open downward due to internal pressure, leaving only the Luer joint as the sole passage. At this time, the liquid enters the push rod. When the spring is released, the steel balls in the adapter block are pressed tightly against the inclined surface due to internal pressure and the spring, resulting in a seal. The steel balls inside the sealing tube open forward due to internal pressure, allowing the liquid to enter the front end and then be sprayed out from the nozzle.

[0008] Furthermore, the battery is placed independently at the bottom of the casing; the motor is placed at the rear of the casing, with its shaft connected to the rear of the rotating worm. There is a boss at the front of the rotating worm that rotates on the worm measuring plate, which can detect the rotation angle and stop at regular intervals.

[0009] Furthermore, there are two transmission bearings, which, together with the spring connecting rod, form a whole. One set of transmission bearings is tangent to the inclined plane of the rotating worm and moves back and forth with the rotation of the motor. The compression spring is located in the middle section of the spring connecting rod and is fixed by a spring pressure plate. Power is provided by compressing the spring by moving the spring connecting rod. The top is a liquid push rod with a sealing ring. During the compression and release of the spring, the liquid push rod passes through the adapter block and the liquid storage chamber in sequence and is connected by two piston fixing rods. A buffer pad is fixed behind the adapter block. The groove above is equipped with anti-reverse steel ball A and small spring A. A steel ball sealing tube is installed above that. At the end of the steel ball sealing tube is an external Luer connector.

[0010] Furthermore, in the nozzle assembly, the nozzle base has a nozzle at the front end, a small spring A and an anti-reverse steel ball A at the rear, and is fixed and limited by a sealing tube; the outside is a nozzle sleeve, and a nozzle sleeve spring is installed at the rear.

[0011] Furthermore, the outer side of the rotating worm is a smooth, spiral-shaped inclined plane with an angle of approximately 300°, and there is a radially vertical plane beyond the apex of the inclined plane. When the motor rotates, the worm rotates, causing the bearing of the spring connecting rod to move backward, resulting in the spring pressure plate compressing the spring. When the bearing of the spring connecting rod passes the apex of the worm, it drops instantaneously, pushing the liquid ejector rod to eject the liquid, and the spring pressure plate collides with the buffer pad in front to stop the spring.

[0012] Furthermore, a Hall sensor is connected to the worm gear positioning plate. This Hall sensor passes through the adapter block, the outer shell, and the liquid storage chamber, and is flush with the outer surface of the liquid storage chamber. When the nozzle sleeve is pushed to the bottom, the Hall sensor is triggered, the motor starts to rotate, the nozzle sleeve is released, and the nozzle sleeve is springed back, thus achieving the effect of single-shot injection or continuous injection with a single start.

[0013] The present invention has the following advantages: The present invention provides a veterinary electric needleless injector with three more optimized functional structures: (1) The triggering device is simpler and more practical: it can be triggered by pressing the head, and can be pressed on the animal when in use, which can also prevent the liquid from flying out due to not adhering to the epidermis. (2) It is more convenient to change medicine, medicine bottle, etc.: a universal external Luer connector is installed at the top of the liquid inlet pipe. When in use, the Luer connector of the medicine bag can be directly put on, or when using homemade medicine bottle or medicine tube, the medicine tube can be directly put on the Luer connector. (3) The power structure is more stable and simpler: the motor drives the worm to rotate, and then drives a straight connecting rod to run. The worm can convert the radial force of the motor into the axial force of the connecting rod with only one part. As a large solid metal part, the worm is difficult to deform except for surface friction marks, which greatly extends the service life and eliminates the risk of use caused by material breakage and misalignment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram showing the location of the Hall sensor in this application;

[0016] Figure 3 This is a schematic diagram of the nozzle assembly structure in this application;

[0017] Figure 4 This is a schematic diagram of the liquid inlet pipe assembly structure in this application.

[0018] The components include: outer casing 1, battery 2, nozzle assembly 3, liquid inlet pipe assembly 4, liquid storage chamber 5, adapter block 6, motor 7, rotating worm gear 8, worm gear measuring plate 9, compression spring 10, spring connecting rod 11, piston fixing rod 12, transmission bearing 13, spring pressure plate 14, buffer pad 15, liquid push rod 16, Hall sensor 17, nozzle 3-1, nozzle sleeve 3-2, nozzle sleeve spring 3-3, nozzle base 3-4, sealing tube 3-5, anti-reverse steel ball A3-6, small spring A3-7, external Luer connector 4-1, anti-reverse steel ball B4-2, and small spring B4-3. Detailed Implementation

[0019] The following will be combined with the appendix Figures 1-4 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] This utility model provides an electric needleless veterinary injector to solve the technical defects of existing electric needleless injectors, such as cumbersome power structure, complicated spring compression method, difficulty in changing medication, and inconvenient triggering device.

[0021] like Figures 1-4 As shown, the electric needle-free injector described in this application includes a housing 1, a battery 2, a nozzle assembly 3, an inlet tube assembly 4, a liquid storage chamber 5, an adapter block 6, a motor 7, a rotating worm gear 8, a worm gear positioning plate 9, a compression spring 10, a spring connecting rod 11, a piston fixing rod 12, a transmission bearing 13, a spring pressure plate 14, a buffer pad 15, a liquid push rod 16, and a Hall sensor 17. The nozzle assembly 3 includes a nozzle 3-1, a nozzle sleeve 3-2, a nozzle sleeve spring 3-3, a nozzle base 3-4, a sealing tube 3-5, an anti-reverse steel ball A3-6, and a small spring A3-7. The inlet tube assembly 4 includes an external Luer connector 4-1, an anti-reverse steel ball B4-2, and a small spring B4-3.

[0022] The assembly method corresponding to this application is as follows:

[0023] Battery 2 is placed independently below housing 1; motor 7 is placed behind housing 1, with its shaft connected to the rear of rotating worm 8. A boss in front of rotating worm 8 rotates on worm measuring plate, which can detect the rotation angle and stop at a time. Two transmission bearings 13 and spring connecting rod 11 form a whole. The large bearing is tangent to the inclined surface of the worm and moves back and forth with the rotation of the motor. Compression spring 10 is located in the middle of spring connecting rod 11 and is fixed by spring pressure plate 14. Power is provided by compressing the spring by moving the spring connecting rod. The top is a liquid push rod 16 with a sealing rubber ring. During the compression and release of the spring, liquid push rod 16 passes through adapter block 6 and liquid storage chamber 5 in sequence and is connected by two piston fixing rods. A buffer rubber pad 15 is fixed behind adapter block 6. Anti-reverse steel ball A3-6 and small spring A3-7 are installed in the groove above. Steel ball sealing tube 3-5 is installed above. At the end of steel ball sealing tube 3-5 is an external Luer connector 4-1.

[0024] like Figure 3 In the nozzle assembly shown: the nozzle base 3-4 has a nozzle 3-1 installed at the front end, a small spring A3-7 and an anti-reverse steel ball A3-1 installed at the rear, and is fixed and limited by a sealing tube; the outside is a nozzle sleeve 3-2, and a nozzle sleeve spring 3-3 is installed at the rear.

[0025] Drug flow pattern: The nozzle assembly 3 is installed at the front end of the liquid storage chamber 5. There is a connecting channel between the adapter block 6 and the liquid storage chamber 5, which connects to the Luer connector 4-1. The liquid flows through the drug push rod to the nozzle 3-1. The only two outlets of this channel are the Luer connector and the nozzle. When the spring is compressed, causing the drug push rod to move backward, the steel ball in the sealing tube is pressed against the inclined surface due to the spring and internal pressure, resulting in a seal. The steel ball in the adapter block opens downward due to internal pressure, leaving only the Luer connector as the sole passage. At this time, the drug enters the push rod. When the spring is released, the steel ball in the adapter block is pressed against the inclined surface due to internal pressure and the spring, resulting in a seal. The steel ball in the sealing tube opens forward due to internal pressure, allowing the liquid to enter the front end and then be sprayed out from the nozzle.

[0026] Spring release principle: The outer side of the rotating worm 8 is a smooth spiral inclined plane with an angle of approximately 300°. Beyond the apex of the inclined plane is a radially vertical plane. When the motor rotates, the worm rotates, causing the bearing of the spring connecting rod to move backward, resulting in the spring pressure plate compressing the spring. When the bearing of the spring connecting rod passes the apex of the worm, it drops instantaneously, pushing the liquid ejector rod to eject the liquid. The spring pressure plate then collides with the front buffer pad to stop the spring.

[0027] Triggering device: A Hall sensor 17 is connected to the worm gear positioning plate 9. The Hall sensor 17 passes through the adapter block 6, the outer shell 1, and the liquid storage chamber 5, and is flush with the outer surface of the liquid storage chamber 5. When the nozzle sleeve is pushed to the bottom, the Hall sensor is triggered, the motor starts to rotate, the nozzle sleeve is released, and the nozzle sleeve is springed back, so as to achieve the effect of single-shot injection or single-start continuous injection.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A veterinary powered needle-free injector characterized by; The application relates to a liquid medicine injection device, which comprises a shell (1), a battery (2), a nozzle assembly (3), a liquid inlet pipe assembly (4), a liquid storage cavity (5), an adapter block (6), a motor (7), a rotating worm (8), a worm position measuring plate (9), a compression spring (10), a spring connecting rod (11), a piston fixing rod (12), a transmission bearing (13), a spring pressing plate (14), a buffer rubber pad (15), a liquid medicine push rod (16) and a Hall sensor (17). The nozzle assembly (3) comprises a nozzle (3-1), a nozzle sleeve (3-2), a nozzle sleeve spring (3-3), a nozzle base (3-4), a sealing pipe (3-5), anti-reverse steel ball A (3-6) and small spring A (3-7). The liquid inlet pipe assembly (4) comprises an external luer joint (4-1), anti-reverse steel ball B (4-2) and small spring B (4-3). The nozzle assembly (3) is arranged at the front end of the liquid storage cavity (5), the adapter block (6) and the liquid storage cavity (5) are provided with a connecting channel, the channel is externally connected to the luer joint (4-1), passes through the liquid medicine push rod and reaches the nozzle (3-1), and the only two outlets of the channel are the luer joint and the nozzle.

2. The electrically operated needle-free injector for veterinary use according to claim 1, characterized in that; The battery (2) is independently arranged below the shell (1); the motor (7) is arranged at the rear of the shell (1) and is connected to the rear of the rotating worm (8) through the shaft center, the front of the rotating worm (8) is provided with a boss which rotates on the worm position measuring plate and can detect the rotating angle and stop at a certain time.

3. The electrically operated needle-free injector for veterinary use according to claim 1, characterized in that; The transmission bearing (13) is provided with two groups, the transmission bearing (13) and the spring connecting rod (11) form an integral whole, one group of the transmission bearing (13) is tangent to the inclined surface of the rotating worm (8) and moves back and forth along with the rotation of the motor, the compression spring (10) is arranged in the middle section of the spring connecting rod (11) and is fixed by the spring pressing plate (14), the power is provided by the compression spring through the movement of the spring connecting rod, the top is the liquid medicine push rod (16) provided with a sealing rubber ring, the liquid medicine push rod (16) sequentially passes through the adapter block (6) and the liquid storage cavity (5) in the spring compression and release process and is connected by two piston fixing rods, the rear of the adapter block (6) is fixed with the buffer rubber pad (15), the anti-reverse steel ball A (3-6) and the small spring A (3-7) are arranged in the groove at the upper portion, the steel ball sealing pipe (3-5) is arranged above, and the luer joint (4-1) is externally connected to the end of the steel ball sealing pipe (3-5).

4. The electrically operated needle-free injector for veterinary use according to claim 1, characterized in that; In the nozzle assembly (3), the nozzle base (3-4) is provided with the nozzle (3-1) at the front end, the rear is provided with the small spring A (3-7) and the anti-reverse steel ball A (3-6), and the sealing pipe is used for fixing and limiting; the outside is the nozzle sleeve (3-2), and the rear is provided with the nozzle sleeve spring (3-3).

5. The electrically operated needle-free injector for veterinary use according to claim 1, characterized in that; The outer side of the rotating worm (8) is a spiral smooth inclined surface, the inclined surface is about 300 DEG, and a radial vertical surface is arranged at the top of the inclined surface.

6. The electrically operated needle-free injector for veterinary use according to claim 1, characterized in that; The worm position measuring plate (9) is connected with a Hall sensor (17), the Hall sensor (17) passes through the adapter block (6), the shell (1) and the liquid storage cavity (5) and is flush with the outer side plane of the liquid storage cavity (5).

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