A medical injection gun capable of quantitative injection

Abstract

The application discloses a medical injection gun capable of quantitative injection, and belongs to the technical field of medical injection guns. The medical injection gun capable of quantitative injection comprises a main shell, a sub-shell fixedly connected to the bottom of the main shell, and a handle fixedly connected to the inner side of the sub-shell. The injection structure is arranged. When the pressing button is pressed, the pressing rod is driven to move, the second rack is moved along the direction of the second sliding groove, the gear is driven to rotate when the second rack moves, the first rack is moved in the direction opposite to the second rack, the wedge block is driven to move to the position of the connecting block, the connecting block is lifted, the moving rod is lifted, the piston rod of the injection needle is pushed by the push plate to perform injection, and thus the quantitative injection of the injection needle is completed. Therefore, the medical injection gun can perform quantitative injection according to the use requirement, and the medical injection gun can adapt to more use scenarios.

Description

Technical Field

[0001] This invention belongs to the field of medical injection gun technology, specifically relating to a medical injection gun capable of quantitative injection. Background Technology

[0002] A medical injection gun is a medical device used to inject drugs. Injection guns are commonly used to inject liquid drugs, such as vaccines, biological products, and analgesics. Compared with traditional syringes, injection guns have higher injection speeds and better precision. They can ensure that drugs are accurately delivered into the patient's body and can control the depth and speed of injection to ensure drug absorption and safety. However, many injection guns in the current technology cannot perform quantitative injections. In some usage scenarios that require multiple injections or quantitative injections, the advantages of medical injection guns cannot be effectively utilized, leading to inconvenience in the use of medical injection guns. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a medical injection gun that can inject quantitatively.

[0004] The technical solution adopted to solve the above-mentioned technical problems is: a medical injection gun capable of quantitative injection, including a main shell, a secondary shell fixedly connected to the bottom of the main shell, a handle fixedly connected to the inner side of the secondary shell, an injection structure provided inside the main shell, an injection needle placement shell fixedly connected to the side of the main shell away from the secondary shell, a first reserved opening provided at the top of the injection needle placement shell, retaining rings symmetrically fixedly connected to the inner wall of the injection needle placement shell away from the main shell, a needle fixing block fixedly connected to the side of the injection needle placement shell near the retaining ring, a second reserved opening provided at the top of the needle fixing block, and an anti-dislodgement rubber ring provided in the second reserved opening.

[0005] Through the above technical solution, the injection needle can be placed in the injection needle housing through the first reserved port, and the retaining ring can limit the injection needle to prevent it from moving during injection. The anti-dislodgement rubber ring is made of rubber, and the needle tip of the injection needle is placed in the anti-dislodgement rubber ring through the second reserved port, so that the anti-dislodgement rubber ring wraps around the needle tip of the injection needle to prevent the needle tip from moving, thereby improving the safety and accuracy of injection.

[0006] Furthermore, the injection structure includes symmetrically arranged fixing rods, which are fixedly connected to the main housing. Each fixing rod has a plurality of first helical teeth on its top surface, and a movable rod is symmetrically arranged on the inner side of the fixing rod. A plurality of second helical teeth are fixedly connected to the top surface of the movable rod.

[0007] Furthermore, a first movable plate is provided at the top of the fixed rod, and connecting plates are symmetrically fixedly connected to the bottom surface of the first movable plate. Several connecting posts are fixedly connected to the inner side of the connecting plates, and the several connecting posts are respectively arranged between two first helical teeth.

[0008] With the above technical solution, when the moving rod is raised, the second helical tooth will move to the position of the connecting post, thereby lifting the connecting post and moving it from its current slot to the next slot. When the connecting post moves, it will drive the moving rod to move, causing the first moving plate to move toward the direction of the injection needle.

[0009] Furthermore, the first movable plate is symmetrically fixedly connected to the side of the injection needle placement shell with a first sliding block, and a push plate is provided on the side of the first movable plate with the first sliding block. The push plate is provided with a first sliding groove at the position of the first sliding block, and the first sliding block is respectively disposed in the first sliding groove. The push plate is provided with a circular groove on the side away from the first movable plate.

[0010] With the above technical solution, when the first moving plate moves, it will drive the push plate to move, so that the push plate pushes the piston rod of the injection needle to inject. Since the distance the first moving plate moves each time is fixed, the distance the push plate pushes the piston rod of the injection needle each time is also fixed, thereby completing the quantitative injection of the injection needle.

[0011] Furthermore, a connecting block is fixedly connected to the bottom surface of the moving rod, a wedge-shaped block is provided at the bottom end of the connecting block, a first rack is fixedly connected to the bottom surface of the wedge-shaped block, a gear is provided at the bottom end of the first rack, the gear meshes with the first rack, and a second rack is provided at the bottom end of the gear, the second rack meshes with the gear.

[0012] With the above technical solution, when the second rack moves, it will drive the gear to rotate, causing the first rack to move in the opposite direction to the second rack, so that the first rack drives the wedge block to the position of the connecting block, thereby lifting the connecting block and raising the moving rod.

[0013] Furthermore, a first transmission rod is fixedly connected to either side of the gear, a ratchet is fixedly connected to the outer wall of the first transmission rod, the end of the first transmission rod away from the gear is rotatably connected to the inner wall of the sub-housing, a locking block is provided on the ratchet, a second transmission rod is fixedly connected to the side of the locking block away from the gear, the second transmission rod passes through the adjacent sub-housing and is rotatably connected to the sub-housing, and a knob is fixedly connected to the end of the second transmission rod away from the locking block.

[0014] With the above technical solution, when the gear rotates, it will drive the first transmission rod to rotate, causing the ratchet to rotate. During injection, the locking block will not affect the rotation of the ratchet, and at the same time, it will prevent the ratchet from rotating in the opposite direction, so as to ensure that the injection is sufficient each time. After an injection is completed, the knob can be turned to drive the second transmission rod to rotate, so that the locking block will no longer block the reverse rotation of the ratchet, and the gear and rack can be reset.

[0015] Furthermore, a second sliding block is fixedly connected to the bottom surface of the second rack, a fixing plate is provided at the bottom end of the second rack, the fixing plate is fixedly connected to the sub-shell, and a second sliding groove is provided on the fixing plate near the second sliding block, and the second sliding block is disposed in the second sliding groove.

[0016] Through the above technical solution, the fixed plate and the second slide can limit the movement of the second rack and prevent the second rack from deviating.

[0017] Furthermore, a spring is fixedly connected to the side of the fixing plate near the injection needle placement shell, and a second movable plate is fixedly connected to the end of the spring away from the fixing plate. The second movable plate is fixedly connected to the second rack, and a pressure rod is fixedly connected to the side of the second movable plate away from the fixing plate. A button is fixedly connected to the end of the pressure rod away from the pressure rod.

[0018] With the above technical solution, pressing the button will drive the pressure rod to move, which in turn drives the second moving plate to move, causing the second rack to move along the direction of the second slide groove, and causing the spring to change from a relaxed state to a tightened state. When the injection is completed and the knob is rotated, the spring will change from a tightened state back to a relaxed state, and drive the second moving plate to reset, so that the gear and rack return to their initial positions.

[0019] Furthermore, a response button is provided on the inner wall of the sub-housing near the first rack, and an indicator light is provided on the outer wall of the sub-housing near the knob.

[0020] With the above technical solution, when the second rack moves to the position of the response button, the response button will be triggered, causing the indicator light to light up, thus indicating that a quantitative injection has been performed.

[0021] The beneficial effects of this invention are as follows: This invention features an injection structure where pressing a button moves a pressure rod, which in turn moves a second moving plate. This causes a second rack to move along the direction of a second sliding groove. As the second rack moves, it rotates a gear, causing a first rack to move in the opposite direction. This first rack moves a wedge block to the position of a connecting block, lifting the connecting block and raising the moving rod. When the first moving plate moves, it moves a push plate, which in turn pushes the piston rod of the injection needle for injection. Since the distance the first moving plate moves each time is fixed, the distance the push plate pushes the piston rod of the injection needle each time is also fixed. This allows for quantitative injection, enabling the medical injection gun to perform quantitative injections according to usage requirements and adapt to more application scenarios. This invention features a response button. When the second rack moves to the position of the response button, it is triggered, causing an indicator light to illuminate, indicating that a quantitative injection has been performed. This allows staff to clearly understand whether a sufficient amount of injection has been completed, improving the convenience of using the medical injection gun and also enhancing the injection quality. Attached Figure Description

[0022] Figure 1 This is a first-view schematic diagram of the present invention; Figure 2 This is a second-view schematic diagram of the present invention; Figure 3 This is a cross-sectional plan view of the present invention; Figure 4 This is a first-view schematic diagram of the injection structure in this invention; Figure 5 This is a second-view schematic diagram of the injection structure in this invention; Figure 6 This is a partial structural diagram of the injection structure in this invention.

[0023] Reference numerals: 1. Main housing; 2. Injection needle placement housing; 201. First reserved port; 202. Retaining ring; 203. Needle fixing block; 204. Second reserved port; 205. Anti-drop rubber ring; 3. Sub-housing; 301. Response button; 302. Indicator light; 4. Handle; 5. Injection structure; 501. Fixing rod; 502. First helical tooth; 503. Moving rod; 504. Second helical tooth; 505. Connecting block; 506. First moving plate; 507. Connecting plate; 50 8. Connecting column; 509. First sliding block; 510. Push plate; 511. First slide groove; 512. First rack; 513. Wedge block; 514. Gear; 515. First transmission rod; 516. Ratchet; 517. Second rack; 518. Second sliding block; 519. Fixed plate; 520. Second slide groove; 521. Spring; 522. Second moving plate; 523. Pressure rod; 524. Press button; 525. Locking block; 526. Second transmission rod; 527. Knob. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] like Figures 1 to 6 As shown, a medical injection gun capable of quantitative injection in this embodiment includes a main housing 1, a secondary housing 3 fixedly connected to the bottom of the main housing 1, a handle 4 fixedly connected to the inner side of the secondary housing 3, an injection structure 5 provided inside the main housing 1, an injection needle placement shell 2 fixedly connected to the side of the main housing 1 away from the secondary housing 3, a first reserved opening 201 provided at the top of the injection needle placement shell 2, a retaining ring 202 symmetrically fixedly connected to the inner wall of the injection needle placement shell 2 away from the main housing 1, a needle fixing block 203 fixedly connected to the side of the injection needle placement shell 2 near the retaining ring 202, a second reserved opening 204 provided at the top of the needle fixing block 203, and an anti-dislodgement rubber ring 205 provided inside the second reserved opening 204; A response button 301 is provided on the inner wall of the sub-shell 3 near the first rack 512, and an indicator light 302 is provided on the outer wall of the sub-shell 3 near the knob 527. The injection structure 5 includes symmetrically arranged fixing rods 501, which are fixedly connected to the main shell 1. Several first helical teeth 502 are provided on the top surface of each fixing rod 501. Moving rods 503 are symmetrically arranged on the inner side of the fixing rods 501, and several second helical teeth 504 are fixedly connected to the top surface of the moving rods 503. A connecting block 505 is fixedly connected to the bottom surface of the moving rod 503. A wedge block 513 is provided at the bottom end of the connecting block 505. A first rack 512 is fixedly connected to the bottom surface of the wedge block 513. A gear 514 is provided at the bottom end of the first rack 512. The gear 514 meshes with the first rack 512. A second rack 517 is provided at the bottom end of the gear 514. The second rack 517 meshes with the gear 514. A second sliding block 518 is fixedly connected to the bottom surface of the second rack 517. A fixing plate 519 is provided at the bottom end of the second rack 517. The fixing plate 519 is fixedly connected to the sub-housing 3. A second sliding groove 520 is provided near the second sliding block 518 on the fixing plate 519. The second sliding block 518 is located in the second sliding groove 520. A first transmission rod 515 is fixedly connected to either side of the gear 514. A ratchet 516 is fixedly connected to the outer wall of the first transmission rod 515. The end of the first transmission rod 515 away from the gear 514 is rotatably connected to the inner wall of the sub-housing 3. A locking block 525 is provided on the ratchet 516. A second transmission rod 526 is fixedly connected to the side of the locking block 525 away from the gear 514. The second transmission rod 526 passes through the adjacent sub-housing 3 and is rotatably connected to the sub-housing 3. A knob 527 is fixedly connected to the end of the second transmission rod 526 away from the locking block 525. A spring 521 is fixedly connected to the side of the fixing plate 519 near the injection needle placement shell 2. A second moving plate 522 is fixedly connected to the end of the spring 521 away from the fixing plate 519. The second moving plate 522 is fixedly connected to the second rack 517. A pressure rod 523 is fixedly connected to the side of the second moving plate 522 away from the fixing plate 519. A button 524 is fixedly connected to the end of the pressure rod 523 away from the pressure rod 523. A first movable plate 506 is provided at the top of the fixed rod 501. A connecting plate 507 is symmetrically fixedly connected to the bottom surface of the first movable plate 506. A plurality of connecting posts 508 are fixedly connected to the inner side of the connecting plate 507. The plurality of connecting posts 508 are respectively arranged between two first helical teeth 502. A first sliding block 509 is symmetrically fixedly connected to the side of the first movable plate 506 near the injection needle placement shell 2. A push plate 510 is provided on the side of the first movable plate 506 near the first sliding block 509. A first sliding groove 511 is provided on the push plate 510 near the first sliding block 509. The first sliding blocks 509 are respectively arranged in the first sliding groove 511. A circular groove is provided on the side of the push plate 510 away from the first movable plate 506.

[0026] The working principle of this embodiment is as follows: First, the injection needle is placed in the injection needle placement shell 2 through the first reserved opening 201, so that the retaining ring 202 limits the injection needle and prevents the injection needle from moving during injection. Then, the needle tip of the injection needle is placed in the anti-dislodgement rubber ring 205 through the second reserved opening 204, so that the anti-dislodgement rubber ring 205 wraps around the needle tip of the injection needle and prevents the needle tip from moving. After that, pressing the button 524 will drive the pressure rod 523 to move, so that the pressure rod 523 drives the second moving plate. 522 moves, causing the second rack 517 to move along the direction of the second slide groove 520, and causing the spring 521 to change from a relaxed state to a tightened state. When the second rack 517 moves, it drives the gear 514 to rotate, causing the first rack 512 to move in the opposite direction to the second rack 517. This causes the first rack 512 to drive the wedge block 513 to move to the position of the connecting block 505, thereby lifting the connecting block 505 and raising the moving rod 503. Furthermore, when the gear 514 rotates... The first transmission rod 515 is driven to rotate, causing the ratchet 516 to rotate. During injection, the locking block 525 does not affect the rotation of the ratchet 516, and also prevents the ratchet 516 from rotating in the opposite direction, ensuring that each injection is of sufficient dosage. At the same time, when the first moving plate 506 moves, it drives the push plate 510 to move, causing the push plate 510 to push the piston rod of the injection needle for injection. When the second rack 517 moves to the position of the response button 301, it will trigger the response button 301, causing the indicator light 302 to light up, indicating that a quantitative injection has been performed. After an injection is completed, the knob 527 can be rotated, causing the knob 527 to drive the second transmission rod 526 to rotate, so that the locking block 525 no longer obstructs the reverse rotation of the ratchet 516. The spring 521 will change from a tightened state to a relaxed state, and drive the second moving plate 522 to reset, so that the gear 514 and the rack return to the initial position, thereby enabling the staff to quickly perform quantitative injections using the medical injection gun of the present invention.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A medical injection gun capable of quantitative injection, comprising a main housing (1), characterized in that: The bottom of the main housing (1) is fixedly connected to the sub-housing (3), and the inner side of the sub-housing (3) is fixedly connected to the handle (4). The main housing (1) is provided with an injection structure (5). The side of the main housing (1) away from the sub-housing (3) is fixedly connected to an injection needle placement shell (2). The top of the injection needle placement shell (2) is provided with a first reserved opening (201). The inner wall of the injection needle placement shell (2) is symmetrically fixedly connected with a retaining ring (202) away from the main housing (1). The side of the injection needle placement shell (2) near the retaining ring (202) is fixedly connected to a needle fixing block (203). The top of the needle fixing block (203) is provided with a second reserved opening (204). The second reserved opening (204) is provided with an anti-drop rubber ring (205). The injection structure (5) includes symmetrically arranged fixing rods (501), which are fixedly connected to the main housing (1). Each fixing rod (501) has a plurality of first helical teeth (502) on its top surface. A movable rod (503) is symmetrically arranged on the inner side of the fixing rod (501), and a plurality of second helical teeth (504) are fixedly connected to the top surface of the movable rod (503). The top of the fixed rod (501) is provided with a first movable plate (506), and a connecting plate (507) is symmetrically fixedly connected to the bottom surface of the first movable plate (506). A plurality of connecting posts (508) are fixedly connected to the inner side of the connecting plate (507), and the plurality of connecting posts (508) are respectively arranged between two first helical teeth (502). A push plate (510) is provided on the side of the first movable plate (506) near the first sliding block (509), and a circular groove is provided on the side of the push plate (510) away from the first movable plate (506). A connecting block (505) is fixedly connected to the bottom surface of the moving rod (503). A wedge block (513) is provided at the bottom end of the connecting block (505). A first rack (512) is fixedly connected to the bottom surface of the wedge block (513). A gear (514) is provided at the bottom end of the first rack (512). The gear (514) meshes with the first rack (512). A second rack (517) is provided at the bottom end of the gear (514). The second rack (517) meshes with the gear (514). A second sliding block (518) is fixedly connected to the bottom surface of the second rack (517), and a fixing plate (519) is provided at the bottom end of the second rack (517). The fixing plate (519) is fixedly connected to the sub-shell (3). A second sliding groove (520) is provided on the fixing plate (519) near the second sliding block (518), and the second sliding block (518) is disposed in the second sliding groove (520). A spring (521) is fixedly connected to the side of the fixed plate (519) near the injection needle placement shell (2). A second movable plate (522) is fixedly connected to the end of the spring (521) away from the fixed plate (519). The second movable plate (522) is fixedly connected to the second rack (517). A pressure rod (523) is fixedly connected to the side of the second movable plate (522) away from the fixed plate (519). A button (524) is fixedly connected to the end of the pressure rod (523) away from the pressure rod (523).

2. The medical injection gun capable of quantitative injection according to claim 1, characterized in that, The first movable plate (506) is symmetrically fixedly connected with a first sliding block (509) on the side near the injection needle placement shell (2). The push plate (510) is provided with a first sliding groove (511) near the first sliding block (509). The first sliding block (509) is respectively disposed in the first sliding groove (511).

3. A medical injection gun capable of quantitative injection according to claim 2, characterized in that, A first transmission rod (515) is fixedly connected to either side of the gear (514). A ratchet (516) is fixedly connected to the outer wall of the first transmission rod (515). The end of the first transmission rod (515) away from the gear (514) is rotatably connected to the inner wall of the sub-housing (3). A locking block (525) is provided on the ratchet (516). A second transmission rod (526) is fixedly connected to the side of the locking block (525) away from the gear (514). The second transmission rod (526) passes through the adjacent sub-housing (3) and is rotatably connected to the sub-housing (3). A knob (527) is fixedly connected to the end of the second transmission rod (526) away from the locking block (525).

4. The medical injection gun capable of quantitative injection according to claim 1, characterized in that, A response button (301) is provided on the inner wall of the sub-shell (3) near the first rack (512), and an indicator light (302) is provided on the outer wall of the sub-shell (3) near the knob (527).

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