Handheld negative pressure subcutaneous microarray injection device

Abstract

The invention discloses a handheld negative pressure subcutaneous microarray injection device in the technical field of handheld injectors, which comprises a main body piece and a needle piece, the main body piece comprises a mounting cavity and an injection cavity, an injection piece is mounted in the mounting cavity, and the bottom end of the injection piece is fixedly connected with an injection rod; the bottom end of the injection rod is fixedly connected with a piston and is positioned in the downward pipe; the needle head piece comprises a medicine distributing disc, a centralizing pipe and array needle heads, and the centralizing pipe is used for being in butt joint communication with the lower pipe; the injector is automatic in injection, easy to operate and uniform in injection speed, pain is greatly relieved, and medical staff or patients can operate the injector with one hand; quantitative control of injection depth and speed is facilitated, so that different injection requirements are accurately met.

Description

Technical Field

[0001] The invention relates to the technical field of handheld syringes, in particular to a handheld negative pressure subcutaneous microarray injection device. Background Art

[0002] In recent years, subcutaneous injection has been widely used in the medical field due to its advantages such as biocompatibility and high drug absorption rate. However, the traditional injection method is often a single-needle manual injection. Due to the full manual injection, the depth of the needle is difficult to control, which is accompanied by strong pain. The drug diffusion range of a single-needle injection is small. For some specific drugs, multiple injections at multiple points are required, which is not suitable for patients who need frequent medication.

[0003] The prior art discloses an injection method using a microarray needle, which can effectively reduce pain and expand the drug diffusion range. However, most of the injections are performed manually, and the speed of pushing the drug, the amount of drug administered, and the injection depth are difficult to adjust, all relying on one's own feeling. In addition, during manual injection, the syringe needs to be pushed while being held. Therefore, it is difficult to stabilize the syringe by oneself, which increases the pain and makes the injection process uncomfortable.

[0004] Based on this, the present invention designs a handheld negative pressure subcutaneous microarray injection device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a handheld negative pressure subcutaneous microarray injection device to solve the problem of manual injection proposed in the above background technology, that the speed of pushing medicine, the amount of medicine administered and the injection depth are difficult to adjust, and all rely on one's own feeling, which will increase the pain and make the injection process more uncomfortable.

[0006] To achieve the above object, the present invention provides the following technical solution: comprising a main body and a needle part, the main body comprising a mounting cavity and an injection cavity, the mounting cavity and the injection cavity are arranged in sequence from top to bottom, an injection part is installed in the mounting cavity, and the bottom end of the injection part is fixedly connected to the injection rod; The bottom of the injection cavity is fixedly connected to a lower tube, and the bottom end of the injection rod is fixedly connected to a piston and is located in the lower tube; The needle assembly comprises a medicine distribution tray, a central tube and an array needle. The medicine distribution tray and the array needle of the central tube are arranged in sequence from top to bottom and are connected. The central tube is used for docking and connecting with the lower tube.

[0007] As a further solution of the present invention, an air pump is installed in the installation cavity, an air pump is connected to the bottom of the air pump with an air extraction pipe, a vent hole is opened at the bottom of the main body, and the air extraction pipe passes through the installation cavity and the injection cavity and is connected to the vent hole.

[0008] As a further solution of the present invention, a fixing plate is provided in the installation cavity, an internal battery and an integrated circuit board are installed on the top of the fixing plate, the injection piece is an electric push rod, a sensor is installed at the bottom of the piston, and the sensor and the injection piece are electrically connected to the internal battery and the integrated circuit board.

[0009] As a further solution of the present invention, an injection push rod is installed at the bottom of the installation cavity, and a push ring is fixedly connected to the end of the injection push rod. The push ring is used to push the needle part to move downward. A control button is installed on the outside of the main body. The injection push rod and the control button are also electrically connected to the internal battery and the integrated circuit board. The number of needles in the array is 9, and each needle has a diameter of 60μm and a length of 2 mm.

[0010] As a further solution of the present invention, a positioning sleeve is slidably connected to the bottom of the main body, and bottom through slides are provided on both sides of the interior of the positioning sleeve. A limiting slider is fixedly connected to the outside of the main body, and the limiting slider is located in the bottom through slide and the two slide together. A positioning column is slidably connected to the limiting slider, and a positioning hole is provided in the bottom through slide. The positioning column is inserted into the positioning hole and cooperates to fix the positioning sleeve. The concentrated tube sleeve of the needle part is arranged outside the medicine outlet tube and a sealing ring is provided outside the medicine outlet tube.

[0011] As a further solution of the present invention, a mounting ring is fixedly connected to the bottom of the main body, and Japanese-shaped perforations are provided on both sides of the mounting ring. An inclined end slide is slidably connected in the Japanese-shaped perforations. The positioning column extends into the interior of the main body and a push block is fixedly connected to the outer wall. The inclined end slide moves upward to push the push block outward.

[0012] As a further solution of the present invention, the outer diameter of the positioning sleeve is consistent with the outer diameter of the main body, a magnetic sheet is provided on the top of the positioning sleeve, and an iron ring is provided on the bottom end of the main body that cooperates with the positioning sleeve.

[0013] As a further solution of the present invention, a return ring is fixedly connected to the bottom of the injection push rod, and return magnetic blocks are fixedly connected to both sides of the return ring. The return magnetic blocks are magnetically matched with the patch at the rear end of the positioning column.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When the syringe is used, the central tube docking sleeve of the needle part is placed on the lower tube, and the injection is automatic, the injection speed is uniform, and the pain is relieved. The medical staff or patients can operate it with one hand, which is convenient for the patient to be self-governing or the medical staff to perform other treatment methods at the same time. It can be widely used in home care or first aid occasions.

[0015] 2. Slide the positioning sleeve down to the bottom, move the end of the positioning column outward and insert it into the positioning hole, complete the installation of the needle component and fix the positioning sleeve at the same time. After installation, the bottom end of the array needle is flush with the positioning sleeve. Therefore, when the positioning sleeve is placed at the injection site, the distance the array needle moves downward is the injection depth, which facilitates the quantitative control of the injection depth and accurately meets different injection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of a half-section structure of the present invention from a front side perspective; Figure 3 It is a schematic diagram of the enlarged structure of part A of the present invention; Figure 4 This is a schematic diagram of the bottom viewing angle structure of the present invention; Figure 5 It is a partial half-section schematic diagram of the upper part of the present invention from a side perspective; Figure 6 It is a schematic diagram of the structure of the present invention from a front viewing angle.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Main body; 2. Injection rod; 3. Needle piece; 4. Injection piece; 5. Piston; 6. Vacuum pump; 7. Down tube; 301. Dispensing plate; 302. Concentrating tube; 303. Array needle; 11. Fixing plate; 12. Air vent; 13. Integrated circuit board; 15. Injection push rod; 16. Push ring; 17. Vacuum tube; 18. Control button; 19. Positioning sleeve; 20. Bottom slide; 21. Limiting slider; 22. Positioning column; 23. Positioning hole; 24. Mounting ring; 25. Bevel end slide; 26. Push block; 27. Return ring; 28. Return magnet; 40. Internal battery. DETAILED DESCRIPTION

[0018] See also Figure 1-6 , the technical solution provided by the present invention is as follows: A main body 1 and a needle part 3, wherein the main body 1 comprises a mounting cavity and an injection cavity, which are arranged in sequence from top to bottom, and an injection part 4 is installed in the mounting cavity, and the bottom end of the injection part 4 is fixedly connected to the injection rod 2; The bottom of the injection cavity is fixedly connected to a down pipe 7, and the bottom end of the injection rod 2 is fixedly connected to a piston 5 and is located in the down pipe 7; The needle component 3 includes a medicine tray 301, a central tube 302 and an array needle 303. The medicine tray 301 and the array needle 303 are arranged in sequence from top to bottom and are connected. The central tube 302 is used to connect with the lower tube 7.

[0019] The specific principles are as follows: When in use, the central tube 302 of the needle part 3 is butt-fitted on the lower tube 7, the injection part 4 is connected to lift the injection rod 2, and the external drug liquid is absorbed into the needle part 3 through the needle part 3 and temporarily stored therein; then the positioning sleeve 19 is attached to the injection site, and the suction pump 6 is connected to remove part of the air in the positioning sleeve 19 and the contacting skin through the suction pipe 17 and the vent hole 12, and then the skin in the contacting site is absorbed and lifted under the action of pressure, thereby reducing the pain during subsequent injections, and it is relatively easy to operate; Then, the injection push rod 15 pushes the push ring 16 downward, thereby pushing out the needle part 3, so that the end array needle 303 penetrates the skin, and then the injection part 4 is connected to push out the injection rod 2 to press the piston 5 downward, thereby pushing out the medicine temporarily stored in the needle part 3, and injecting the medicine, thereby pushing out the medicine to the greatest extent for injection and reducing the residue.

[0020] The array needles of the needle component 3 are preferably 9, but can also be other evenly distributed numbers to increase the injection area so that the drug can be quickly absorbed; the needle diameter is 60 μm and the length is 2 mm, which can reduce pain, and is made of silicon material to ensure good biocompatibility; the injection component 4 uses an electric push rod to promote injection, and medical staff or patients can operate it with one hand, which is convenient for patients to control themselves or medical staff to perform other treatment methods at the same time, and can be widely used in home care or first aid occasions.

[0021] The needle part 3 is a replaceable part, which is convenient for multiple recycling. Before injection, the needle part 3 needs to be installed by sleeve-fitting the central tube 302 from the bottom of the main body 1 to the outside of the tube 7. The central tube 302 is designed to be longer so that it has more overlap with the lower tube 7, which is convenient for controlling the subsequent injection depth. When installing the needle member 3, the positioning sleeve 19 is retracted at the bottom of the main body 1. The magnetic sheet on the top of the positioning sleeve 19 cooperates with the iron ring of the main body 1 to ensure that the positioning sleeve 19 is stably maintained in a state where the bottom end of the main body 1 is exposed, which is convenient for the alignment and initial insertion of the needle member 3. Then, the positioning sleeve 19 is slid downward to the bottom end. At this time, the positioning hole 23 is opposite to the positioning column 22, and the needle member 3 is pushed up again to complete the insertion. When the concentrated tube 302 is docked with the medicine outlet tube 6, the inclined end slide bar 25 is pushed upward, and then the push block 26 is pushed outward, so that the end of the positioning column 22 moves outward and is inserted into the positioning hole 23, thereby completing the installation of the needle component 3 and the fixation of the positioning sleeve 19. After installation, the bottom end of the array needle 303 is flush with the positioning sleeve 19. Therefore, when the positioning sleeve 19 is placed at the injection site, the distance that the array needle 303 moves downward is the injection depth, which facilitates the quantitative control of the injection depth and accurately meets different injection requirements.

[0022] During injection, the push ring 16 is pushed downward by connecting the injection push rod 15, so that the needle part 3 is pushed out from the positioning sleeve 19, thereby realizing automatic injection; when the injection is completed, the main body 1 is pulled out, and then the needle part 3 is completely pushed out by the injection push rod 15 to realize automatic disassembly of the needle part 3, and the needle part 3 gradually leaves the bottom of the inclined end slide bar 25 during the disassembly process, and the inclined end slide bar 25 automatically falls under gravity and no longer resists the push block 26. When the needle part 3 is completely pushed out, the return ring 27 reaches the positioning column 22, and the positioning column 22 is adsorbed and withdrawn from the positioning hole 23 through the return magnetic block 28, and then the positioning sleeve 19 can move up and down freely, thereby facilitating the alignment of the needle part 3 during the next injection; then the push ring 16 is retracted so that the bottom of the push ring 16 is flush with the bottom of the mounting ring 24 of the main body 1, and can be attached to it after the needle part 3 is installed next time, thereby facilitating the control of the injection depth.

[0023] During the pushing process, the sensor at the bottom of the piston 5 senses the pressure of the drug, and then controls the injection speed, so as to achieve a better injection effect. The specific operation can be turned on by the round key in the control button 18, and the injection push rod 15, the injection piece 4 and the sensor 14 are connected; during injection, the injection push rod 15 is controlled by the up and down keys to control the length of its end, thereby controlling the injection depth; the injection piece 4 is controlled by the left and right keys to speed up or slow down the injection, thereby controlling the injection volume, and then controlling the drug release speed and pain.

Claims

1. A handheld negative pressure subcutaneous microarray injection device, characterized in that: It comprises a main body (1) and a needle part (3), the main body (1) comprising a mounting cavity and an injection cavity, the mounting cavity and the injection cavity being arranged in sequence from top to bottom, an injection part (4) being installed in the mounting cavity, the bottom end of the injection part (4) being fixedly connected to an injection rod (2); The bottom of the injection cavity is fixedly connected to a lower tube (7), and the bottom end of the injection rod (2) is fixedly connected to a piston (5) and is located in the lower tube (7); The needle component (3) comprises a medicine distribution plate (301), a centralizing tube (302) and an array needle (303); the centralizing tube (302), the medicine distribution plate (301) and the array needle (303) are arranged in sequence from top to bottom and are connected; the centralizing tube (302) is used to dock and connect with the lower tube (7).

2. A handheld negative pressure subcutaneous microarray injection device according to claim 1, characterized in that: An air pump (6) is installed in the installation cavity, and an air pump (17) is connected to the bottom of the air pump (6). A vent hole (12) is opened at the bottom of the main body (1), and the air pump (17) passes through the installation cavity and the injection cavity and is connected to the vent hole (12).

3. A handheld negative pressure subcutaneous microarray injection device according to claim 1, characterized in that: A fixing plate (11) is provided in the installation cavity, an internal battery (40) and an integrated circuit board (13) are installed on the top of the fixing plate (11), the injection piece (4) is an electric push rod, a sensor is installed on the bottom of the piston (5), and the sensor and the injection piece (4) are electrically connected to the internal battery (40) and the integrated circuit board (13).

4. A handheld negative pressure subcutaneous microarray injection device according to claim 1, characterized in that: An injection push rod (15) is installed at the bottom of the installation cavity, and a push ring (16) is fixedly connected to the end of the injection push rod (15), and the push ring (16) is used to push the needle member (3) to move downward. A control button (18) is installed on the outside of the main body (1), and the injection push rod (15) and the control button (18) are also electrically connected to the internal battery (40) and the integrated circuit board (13). The number of the array needles (303) is 9, and each needle has a diameter of 60 μm and a length of 2 mm.

5. A handheld negative pressure subcutaneous microarray injection device according to claim 4, characterized in that: The bottom of the main body (1) is slidably connected to a positioning sleeve (19), and bottom through slideways (20) are provided on both sides of the positioning sleeve (19). A limiting slider (21) is fixedly connected to the outside of the main body (1), and the limiting slider (21) is located in the bottom through slideway (20) and the two are slidably matched. A positioning column (22) is slidably connected to the limiting slider (21), and a positioning hole (23) is provided in the bottom through slideway (20). The positioning column (22) is inserted into and matched with the positioning hole (23) to fix the positioning sleeve (19). The central tube (302) of the needle member (3) is sleeved outside the medicine outlet tube (6), and a sealing ring is provided outside the medicine outlet tube (6).

6. A handheld negative pressure subcutaneous microarray injection device according to claim 5, characterized in that: The bottom of the main body (1) is fixedly connected to a mounting ring (24), both sides of the mounting ring (24) are provided with Japanese-shaped through holes, and the Japanese-shaped through holes are slidably connected to an inclined end slide bar (25), the positioning column (22) extends into the interior of the main body (1) and the outer wall is fixedly connected to a push block (26), and the inclined end slide bar (25) moves upward to push the push block (26) outward.

7. A handheld negative pressure subcutaneous microarray injection device according to claim 5, characterized in that: The outer diameter of the positioning sleeve (19) is consistent with the outer diameter of the main body (1), a magnetic attraction sheet is provided on the top of the positioning sleeve (19), and an iron ring is provided at the bottom end of the main body (1) and the positioning sleeve (19) that cooperate with each other.

8. The handheld negative pressure subcutaneous microarray injection device according to claim 6, characterized in that: The bottom of the injection push rod (15) is fixedly connected to a return ring (27), and both sides of the return ring (27) are fixedly connected to return magnetic blocks (28), and the return magnetic blocks (28) are magnetically matched with the patch at the rear end of the positioning column (22).

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