A needle-free injection device that automatically adjusts injection pressure

Abstract

The utility model belongs to the needleless injection equipment technical field, specifically disclose a kind of automatic adjustment injection pressure's needleless injection device, comprising: injection subassembly, including injection cavity and push rod piston, push rod piston is movably installed in injection cavity;Push rod subassembly, including push rod and spring, push rod and push rod piston fixed connection, spring is sleeved on push rod, and when push rod moves, first compression spring, then be released process when driving to move;Automatic pressure regulating subassembly, with the rear end of push rod subassembly is connected, for the rear end limit position of spring is automatically adjusted, to change the compression amount of spring when device works to change the injection pressure of device.The utility model is according to different day age section's pig group, through automatic pressure regulating subassembly, the rear end limit position of spring is automatically adjusted, and then through the adjustment of spring compression amount, to realize the adjustment of device injection pressure.

Description

Technical Field

[0001] This utility model belongs to the technical field of needle-free injection equipment, and in particular relates to a needle-free injection device that automatically adjusts injection pressure. Background Technology

[0002] Injection therapy is crucial in the livestock industry, reducing disease-related mortality in pig herds. Needle-free injection technology eliminates the risks of needle breakage and cross-infection between different animals associated with traditional needle-based injections. However, pigs of different ages have varying skin thicknesses, requiring different injection pressures when using needle-free immunization to ensure the medication is delivered intradermally and promote faster antibody production.

[0003] To meet the needs of pigs of different ages, needle-free devices need to be able to adjust the injection pressure so that one needle-free device can be used for immunization of pigs of all different ages. If the injection pressure is manually adjusted, it will not only increase the workload of the staff, but also cause deviations in on-site execution.

[0004] Therefore, designing a needle-free injection device that can automatically adjust the device pressure according to the age of the immunized pig herd to ensure the immunization effect has become a key research topic in the existing technology field. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings of the prior art, this utility model provides a needleless injection device with automatic adjustment of injection pressure, which solves the above problems.

[0006] To achieve the above objectives, this utility model discloses a needle-free injection device with automatic adjustment of injection pressure, comprising:

[0007] An injection assembly includes an injection chamber and a push rod piston, the push rod piston being movably mounted within the injection chamber;

[0008] A push rod assembly includes a push rod and a spring, wherein the push rod and the push rod piston are fixedly connected, the spring is fitted on the push rod, and when the push rod moves, the spring is first compressed and then driven to move during the release process of the spring;

[0009] An automatic pressure regulating component is connected to the rear end of the push rod assembly and is used to automatically adjust the rear end limit position of the spring, thereby changing the compression of the spring during device operation to change the injection pressure of the device.

[0010] Compared with existing technologies, this application has the following advantages: During use, the automatic pressure regulating component automatically adjusts the rear limit position of the spring according to the pig herd's age, thereby regulating the injection pressure of the device by adjusting the spring compression. After the pressure is adjusted, the drive rod moves backward to compress the spring, simultaneously driving the push rod piston to move backward within the injection chamber, allowing external medication to enter the injection chamber. When injection is needed, the spring pressure is released, which in turn drives the push rod forward, injecting the medication into the pig's skin.

[0011] In summary, this application addresses the issue of different injection pressures required for pigs of different ages and the problem of non-standard manual pressure adjustment on-site by adding an automatic pressure adjustment component, thereby ensuring immunization effectiveness.

[0012] Furthermore, the automatic pressure regulating assembly includes a pressure regulating motor and a pressure regulating screw coaxially connected to the pressure regulating motor. The pressure regulating screw is coaxially connected to a pressure regulating block, the pressure regulating block is connected to the rear end of a top block, and the front end of the top block is connected to the rear end limit position of the spring. When the pressure regulating motor rotates forward and backward, it drives the pressure regulating screw to rotate forward and backward, thereby driving the pressure regulating block to move back and forth, which in turn drives the top block to move back and forth to adjust the compression of the spring.

[0013] Furthermore, the voltage regulating motor is fixed inside the device by a motor fixing block and a rear fixing plate.

[0014] Furthermore, it also includes a power assembly for driving the push rod to move in order to compress the spring.

[0015] Furthermore, the power assembly includes a power motor, a planar cam, and a cam pin. The power motor is connected to the planar cam, the planar cam abuts against the cam pin, and the cam pin is connected to the push rod. When the power motor is working, it drives the planar cam to rotate, thereby causing the cam pin to move along the curved surface of the planar cam, thus realizing the movement of the push rod.

[0016] Furthermore, the power motor is vertically designed within the device.

[0017] Furthermore, the tube wall of the top block is designed with an elongated hole, and the cam pin passes through the elongated hole.

[0018] Furthermore, the circumferential surface of the planar cam abuts against the circumferential surface of the cam pin, and the cam pin is perpendicularly connected to the push rod.

[0019] Furthermore, a pressure sensor is provided between the top block and the pressure regulating block. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the internal structure of the needleless injection device with automatic injection pressure adjustment according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the external structure of the needleless injection device with automatic injection pressure adjustment according to an embodiment of the present invention.

[0023] Figure 3 for Figure 1 A sectional view;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure on the other side.

[0025] The attached figures are labeled as follows:

[0026] 1. Injection assembly; 11. Injection chamber; 12. Push rod piston; 2. Push rod assembly; 21. Push rod; 22. Spring; 3. Automatic pressure regulating assembly; 31. Pressure regulating motor; 32. Pressure regulating screw; 33. Pressure regulating block; 34. Top block; 35. Motor fixing block; 36. Rear fixing plate; 4. Power assembly; 41. Power motor; 42. Flat cam; 43. Cam pin. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1-4 As shown, this utility model discloses a needle-free injection device with automatic adjustment of injection pressure, comprising:

[0029] The injection assembly 1 includes an injection chamber 11 and a push rod piston 12, the push rod piston 12 being movably installed inside the injection chamber 11;

[0030] The push rod assembly 2 includes a push rod 21 and a spring 22. The push rod 21 and the push rod piston 12 are fixedly connected. The spring 22 is fitted on the push rod 21. When the push rod 21 moves, it first compresses the spring 22 and is then driven to move by the release process of the spring 22.

[0031] The automatic pressure regulating component 3 is connected to the rear end of the push rod component 2 and is used to automatically adjust the rear end limit position of the spring 22, thereby changing the compression of the spring 22 during operation to change the injection pressure of the device.

[0032] Compared with the prior art, this application has the following advantages: During use, the automatic pressure regulating component 3 automatically adjusts the rear limit position of the spring 22 according to the pig herd's age, thereby adjusting the injection pressure of the device by regulating the compression of the spring 22. After the pressure is adjusted, the push rod 21 is driven to move backward to compress the spring 22, simultaneously driving the push rod piston 12 to move backward within the injection chamber 11, allowing external medication to enter the injection chamber 11. When injection is needed, the pressure of the spring 22 is released, which in turn drives the push rod 21 to move forward, thereby injecting the medication into the pig's skin.

[0033] Following the above embodiment, more specifically, the automatic pressure regulating component 3 includes a pressure regulating motor 31 and a pressure regulating screw 32 coaxially connected to the pressure regulating motor 31. The pressure regulating screw 32 is coaxially connected to the pressure regulating block 33, the pressure regulating block 33 is connected to the rear end of the top block 34, and the front end of the top block 34 is connected to the rear end limit position of the spring 22. When the pressure regulating motor 31 rotates forward and backward, it drives the pressure regulating screw 32 to rotate forward and backward, thereby driving the pressure regulating block 33 to move back and forth, thereby driving the top block 34 to move back and forth to adjust the compression of the spring 22.

[0034] In one embodiment, when the pressure regulating motor 31 rotates forward, it drives the pressure regulating block 33 to move forward (towards the injection assembly 1). At this time, the rear end limit position of the spring 22 also moves forward, thereby reducing the compression of the spring 22 under force. In other words, the thrust generated when the spring 22 is released also decreases, and the injection pressure of the injection assembly 1 decreases accordingly. Conversely, when the pressure regulating motor 31 rotates in the reverse direction, it drives the pressure regulating block 33 to move backward, thereby moving the rear end limit position of the spring 22 backward. The compression of the spring 22 under force increases, and the injection pressure of the injection assembly 1 increases.

[0035] Following the above embodiment, more specifically, the voltage regulating motor 31 is fixed inside the device by the motor fixing block 35 and the rear fixing plate 36.

[0036] Following the above embodiments, more specifically, it also includes a power assembly 4 for driving the push rod 21 to move in order to compress the spring 22.

[0037] Following the above embodiment, more specifically, the power assembly 4 includes a power motor 41, a planar cam 42, and a cam pin 43. The power motor 41 is connected to the planar cam 42, the planar cam 42 abuts against the cam pin 43, and the cam pin 43 is connected to the push rod 21. When the power motor 41 is working, it drives the planar cam 42 to rotate, thereby causing the cam pin 43 to move along the curved surface of the planar cam 42, thus realizing the movement of the push rod 21. The design of the planar cam 42 significantly reduces processing costs compared to the curved cams of the prior art.

[0038] Among them, such as Figure 4 As shown, when the power motor 41 rotates counterclockwise, it drives the planar cam 42 to rotate, thereby moving the cam pin 43 backward, which in turn drives the push rod 21 to move backward, thus compressing the spring 22. When the cam pin 43 rotates to the highest point of the planar cam 42, the spring 22 is compressed to its maximum. As the planar cam 42 continues to rotate, the cam pin 43 is no longer pushed by the planar cam 42, and the spring 22 is released, completing one injection. At this time, the planar cam 42, push rod 21, spring 22, cam pin 43, etc., are reset, waiting for the next injection.

[0039] Following the above embodiments, more specifically, the power motor 41 is vertically designed inside the device, which makes the weight distribution of the entire device more even, lighter in the hand, and easier to operate.

[0040] Following the above embodiment, more specifically, the tube wall of the top block 34 is designed with an elongated hole, through which the cam pin 43 passes. The design of the elongated hole allows the cam pin 43 to have a space to move back and forth, and also ensures that the push rod 21 has a space to move back and forth, thereby realizing the compression and release of the spring 22.

[0041] Following the above embodiment, more specifically, the circumferential surface of the planar cam 42 abuts against the circumferential surface of the cam pin 43, and the cam pin 43 is vertically connected to the push rod 21. Through the vertical or planar connection relationship of the above-mentioned components, the layout of the device is more reasonable, the force transmission is more uniform and appropriate during device operation, and the device operates more smoothly.

[0042] Following the above embodiment, more specifically, a pressure sensor is provided between the top block 34 and the pressure regulating block 33. The pressure sensor can detect the pressure generated when the spring 22 is compressed and released, and then automatically feed it back to the control system. The control system then controls the pressure regulating motor 31 to work, which is more conducive to automatically adjusting the injection pressure of the device. The control system can be a PLC controller.

[0043] 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 needle-free injection device with automatically adjustable injection pressure, characterized in that, include: An injection assembly includes an injection chamber and a push rod piston, the push rod piston being movably mounted within the injection chamber; A push rod assembly includes a push rod and a spring, wherein the push rod and the push rod piston are fixedly connected, the spring is fitted on the push rod, and when the push rod moves, the spring is first compressed and then driven to move during the release process of the spring; An automatic pressure regulating component is connected to the rear end of the push rod assembly and is used to automatically adjust the rear end limit position of the spring, thereby changing the compression of the spring during device operation to change the injection pressure of the device.

2. The needle-free injection device with automatically adjustable injection pressure according to claim 1, characterized in that, The automatic pressure regulating assembly includes a pressure regulating motor and a pressure regulating screw coaxially connected to the pressure regulating motor. The pressure regulating screw is coaxially connected to a pressure regulating block, the pressure regulating block is connected to the rear end of a top block, and the front end of the top block is connected to the rear end limit position of the spring. When the pressure regulating motor rotates forward and backward, it drives the pressure regulating screw to rotate forward and backward, thereby driving the pressure regulating block to move back and forth, which in turn drives the top block to move back and forth to adjust the compression of the spring.

3. The needle-free injection device with automatically adjustable injection pressure according to claim 2, characterized in that, The voltage regulating motor is fixed inside the device by a motor fixing block and a rear fixing plate.

4. The needle-free injection device with automatically adjustable injection pressure according to claim 2, characterized in that, It also includes a power assembly for driving the push rod to move in order to compress the spring.

5. The needle-free injection device with automatically adjustable injection pressure according to claim 4, characterized in that, The power assembly includes a power motor, a planar cam, and a cam pin. The power motor is connected to the planar cam, the planar cam abuts against the cam pin, and the cam pin is connected to the push rod. When the power motor is working, it drives the planar cam to rotate, thereby causing the cam pin to move along the curved surface of the planar cam, thus realizing the movement of the push rod.

6. The needle-free injection device with automatically adjustable injection pressure according to claim 5, characterized in that, The power motor is vertically designed inside the device.

7. The needle-free injection device with automatically adjustable injection pressure according to claim 6, characterized in that, The top block has a long, narrow hole in its tube wall, and the cam pin passes through the long, narrow hole.

8. The needle-free injection device with automatically adjustable injection pressure according to claim 7, characterized in that, The circumferential surface of the planar cam abuts against the circumferential surface of the cam pin, and the cam pin is perpendicularly connected to the push rod.

9. A needle-free injection device with automatically adjustable injection pressure according to claim 2, characterized in that, A pressure sensor is installed between the top block and the pressure regulating block.

Images