A liquid filling and injection device

Abstract

The present invention discloses a liquid filling and injection device, which mainly relates to the field of medical equipment. It comprises a main body, a hand wheel is rotatably provided on one side of the main body, a striker mechanism is provided in the main body at a position above the syringe and connected to the connecting shaft; a second push rod is slidably provided in the main body and at a position above the liquid storage cylinder, a dial wheel is rotatably provided in the main body, the bottom end of the second push rod contacts the piston in the liquid storage cylinder, a metering dial bar that can be pulled out laterally is provided on one side of the main body, and the dial wheel is toggled by the metering dial bar; a drug guide shell is detachably provided at the bottom of the syringe and the bottom of the liquid storage cylinder, and the two drug guide shells are connected by a drug guide tube. The beneficial effects of the present invention are: the drug dispensing device and the injection device are combined together, so that the drug dispensing and injection processes are integrated, which is convenient for ordinary patients to operate and use, and can meet the needs of blind patients to control the extraction of the appropriate injection volume, which is conducive to popularization and use.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, in particular to a liquid filling and injection device. Background Art

[0002] Needle-free injection is an injection method that does not require a traditional capillary needle. Instead, a needle-free injection pusher generates pressure through a mechanically stable annular compression spring system, pushing the medication through the patient's subcutaneous tissue. This pressure also reduces the pain and fear of needle pricks.

[0003] Most existing needle-free syringes are structures that combine a drug dispensing device and an injection device. The drug must be dispensed first and then separated for injection. The separation process and operation are cumbersome and have the disadvantage of poor usability. Moreover, for blind patients, a dedicated person is required to dispense the drug and separate it before the injection operation can be performed. Blind patients themselves cannot clearly control the extraction of the appropriate amount of medicine for their injection, which is inconvenient for blind patients to use. Summary of the Invention

[0004] The purpose of the present invention is to provide a liquid filling and injection device, which combines a medicine dispensing device and an injection device to integrate the medicine dispensing and injection processes, making it convenient for ordinary patients to operate and use, and can meet the needs of blind patients to control the extraction of the injection volume suitable for themselves, which is conducive to popularization and use.

[0005] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0006] A liquid filling and injection device comprises a main body, wherein a syringe and a liquid reservoir are respectively provided at the bottom of the main body, wherein the bottom of the syringe passes through the main body, a hand wheel is provided on one side of the main body for rotation via a connecting shaft, and a striker mechanism is provided in the main body above the syringe and in transmission connection with the connecting shaft, wherein the striker mechanism is used to strike the piston rod of the syringe;

[0007] A second push rod is slidably provided in the main body and above the liquid storage cylinder. A dial wheel is rotatably provided in the main body. The second push rod passes through the dial wheel and is threadedly connected to the dial wheel. The bottom end of the second push rod contacts the piston in the liquid storage cylinder. A metering dial bar that can be pulled out laterally is provided on one side of the main body. The dial wheel is toggled by the metering dial bar. The pulling length of the metering dial bar is proportional to the amount of medicine discharged from the liquid storage cylinder.

[0008] The bottom of the injection cylinder and the bottom of the liquid storage cylinder are both detachably covered with a drug guide shell, the two drug guide shells are connected through a drug guide tube, and the bottom of the main body is detachably provided with a cap;

[0009] The striker mechanism includes a gear provided on a connecting shaft. A first push rod is slidably provided in the main body. One side of the first push rod is provided with teeth meshing with the gear. The bottom end of the first push rod is provided with a striker plate. A first spring is sleeved outside the first push rod above the striker plate.

[0010] A limiting mechanism matched with the striker mechanism is provided in the main body. The position of the striker mechanism is restricted by the limiting mechanism, and the striker mechanism can strike the piston rod after the restriction of the limiting mechanism is removed.

[0011] Further, the limiting mechanism includes a sliding groove provided on one side of the main body. A stop rod is slidably provided in the sliding groove. One end of the stop rod penetrates through the sliding groove and is hinged to the inside of the main body. A slider is provided at one end of the stop rod outside the main body.

[0012] Further, a second spring is provided between one side of the stop rod and the inner wall of the main body. The second spring is parallel to the horizontal length direction of the sliding groove.

[0013] Further, a ball spring is provided outside the bottom of the main body. A clamping groove capable of clamping the ball spring is provided on the inner wall of the cap.

[0014] Further, one end of the connecting shaft is provided with an insertion block. A slot inserted with the insertion block is provided on one side of the handwheel.

[0015] Further, a rocker is inserted on the handwheel.

[0016] Further, an installation block is detachably embedded on one side of the main body. The metering strip is slidably arranged on the installation block.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The structure of this patent combines the medicine-taking device and the injection device into one, realizing the integration of medicine-taking and injection. The liquid medicine is filled into the syringe through the dial wheel and the second push rod, and the liquid medicine in the syringe is injected into the patient's subcutaneous tissue through the striker mechanism, which is convenient for ordinary patients to operate and use, and the operation is simple and fast. Moreover, this patent uses the metering strip to drive the dial wheel to rotate, and the amount of medicine added to the syringe is controlled by pulling the length of the metering strip, which can meet the needs of blind patients to independently control the appropriate injection amount for themselves, enabling blind patients to operate the medicine addition and injection processes by themselves without the assistance of others, reducing the work intensity of nursing staff, and being easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 is an exploded view of the overall structure of the present invention.

[0020] Attached Figure 2 is an exploded view of the overall structure of the present invention.

[0021] Reference numerals shown in the drawings:

[0022] 1. Main body; 2. Syringe barrel; 3. Liquid storage barrel; 4. Connecting shaft; 5. Handwheel; 6. Piston rod; 7. Second push rod; 8. Dial wheel; 9. Metering bar; 10. Medicine guiding shell; 11. Medicine guiding tube; 12. Cap; 13. Gear; 14. First push rod; 15. Impact plate; 16. First spring; 17. Chute; 18. Stop bar; 19. Slide block; 20. Second spring; 21. Ball spring; 22. Card slot; 23. Insert block; 24. Insert slot; 25. Crank; 26. Mounting block. Detailed implementation manners

[0023] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0024] The present invention relates to a liquid filling and injection device, the main body structure includes a main body 1, and the bottom of the main body 1 is respectively provided with an injection cylinder 2 and a liquid storage cylinder 3, the liquid storage cylinder 3 is used to store the liquid, the injection cylinder 2 and the liquid storage cylinder 3 can be integrally formed with the main body 1, or a detachable connection method is adopted. In order to facilitate the replacement and maintenance of the injection cylinder 2 and the replacement of the liquid storage cylinder 3, this patent adopts a detachable structure. Of course, even if the liquid storage cylinder 3 is not detachable, an external syringe can be used for adding medicine. The top of the injection cylinder 2 is threadedly connected to the inside of the main body 1, and the liquid storage cylinder 3 passes through the bottom of the main body 1 and is slidably connected to the main body 1. A baffle that can block the through-hole of the liquid storage cylinder 3 is screwed to the bottom of the main body 1 to fix the liquid storage cylinder 3. The injection port at the bottom of the injection cylinder 2 passes through the main body 1 and protrudes from a part of the main body 1 for convenient injection. A handwheel 5 is provided on one side of the main body 1 through a connecting shaft 4, and the connecting shaft 4 is rotatably connected to the inside of the main body 1 through a bearing. A striker mechanism is provided at a position above the injection cylinder 2 in the main body 1, and the striker mechanism includes a The gear 13 is placed on the connecting shaft 4, and the gear 13 rotates with the connecting shaft 4. A first push rod 14 is provided in the main body 1 for vertical sliding, and the first push rod 14 cannot rotate in the main body 1. One side of the first push rod 14 is provided with teeth meshing with the gear 13. The bottom end of the first push rod 14 is provided with a striker plate 15. The first push rod 14 is located above the striker plate 15 and is covered with a first spring 16 on the outside. The top end of the first spring 16 is against the wall of the mounting cavity inside the main body 1, and the gear 13 is driven to rotate by the hand wheel 5. Through the meshing teeth The first push rod 14 drives the striker plate 15 to move upward and squeeze the first spring 16, so that the first spring 16 accumulates force. When injection is required, the hand wheel 5 is released, and the striker plate 15 is pushed by the first spring 16 to strike the piston rod 6 of the syringe 2, so that the liquid medicine in the syringe 2 is injected into the patient's body. In order to realize the up and down sliding of the first push rod 14 and the compression and recovery of the first spring 16, those skilled in the art can make conventional structural improvements to the interior of the main body 1 according to the existing technology. This is a common structure in the existing technology and will not be described in detail here.

[0025] A second push rod 7 is provided in the main body 1 and is located above the liquid storage cylinder 3 for vertical sliding. The second push rod 7 cannot rotate and can only slide up and down in the main body 1. A dial wheel 8 is provided for rotation in the main body 1, and the dial wheel 8 is fixed in the installation position in the main body 1. The specific installation structure of the dial wheel 8 is not described here. It can be rotatably installed through an axis or a seat. The second push rod 7 passes through the dial wheel 8 and is threadedly connected to the dial wheel 8. The bottom end of the second push rod 7 is in contact with the piston in the liquid storage cylinder 3. A metering dial 9 that can be pulled horizontally is provided on one side of the main body 1. After prior conversion, the pulling length of the metering dial 9 is proportional to the amount of medicine discharged from the liquid storage cylinder 3. Therefore, the dosage can be known by pulling the length of the metering dial 9, which is convenient for blind patients to add medicine and inject themselves. Teeth are provided on the outer side of the dial wheel 8, and teeth are provided on the side of the metering dial 9 facing the dial wheel 8 to engage with the dial wheel 8. Other achievable structures can also be selected. The dial wheel 8 is driven by the metering dial 9 to drive the second push rod 7 to slide up and down, so that the bottom end of the second push rod 7 can push the piston of the liquid storage cylinder 3 to slide, thereby squeezing the liquid in the liquid storage cylinder 3 into the injection cylinder 2, and adding medicine to the injection cylinder 2. When the liquid in the liquid storage cylinder 3 is used up, the metering dial 9 can be pulled back to move the second push rod 7 up and reset, and a new liquid storage cylinder 3 can be inserted;

[0026] The bottom of the injection barrel 2 and the bottom of the liquid storage barrel 3 are both detachably covered with a medicine guiding shell 10, which can be sealed with the bottom of the injection barrel 2 and the liquid storage barrel 3 respectively to prevent the medicine from leaking. The two medicine guiding shells 10 are connected by a medicine guiding tube 11, so that the medicine in the liquid storage barrel 3 is injected into the injection barrel 2 through the medicine guiding shell 10 and the medicine guiding tube 11 under the pushing pressure of the second push rod 7, realizing the combination of the dosing device and the injection device structure. The bottom of the main body 1 is detachably provided with a cap 12, which can protect the injection barrel 2 and the liquid storage barrel 3 when not in use.

[0027] Preferably, a limiting mechanism cooperating with the firing pin mechanism is provided in the main body 1, and the position of the firing pin mechanism is limited by the limiting mechanism, and the firing pin mechanism can hit the piston rod 6 after the limiting mechanism is removed. The limiting mechanism moves up the first push rod 14 to squeeze the first spring 16 to accumulate force and then block the bottom of the first push rod 14, preventing the first push rod 14 from driving the striker 15 to hit the piston rod 6 when no injection or dosing operation is performed. There is no need to control the hand wheel 5 to fix the position of the first push rod 14 before injection, which is more convenient and labor-saving to use.

[0028] Preferably, the limiting mechanism includes a sliding groove 17 provided on one side of the main body 1. A stop rod 18 is slidably arranged in the sliding groove 17. One end of the stop rod 18 penetrates through the sliding groove 17 and is hinged to the inside of the main body 1. A slider 19 is provided at the end of the stop rod 18 outside the main body 1. The slider 19 drives one end of the stop rod 18 to slide in the sliding groove 17, causing the other end of the stop rod 18 to rotate around the hinge point. The arrangement of the stop rod 18 does not prevent the up-and-down sliding of the second push rod 7. When the handwheel 5 rotates to drive the first push rod 14 to move upward and compress the first spring 16 until the striker plate 15 is located above the stop rod 18, the slider 19 is used to push the end of the stop rod 18 to move the stop rod 18 below the striker plate 15, restricting the position of the striker plate 15 and keeping the first spring 16 in a state of stored energy all the time. When injection is needed, just move the slider 19 to move the stop rod 18 away. There is no need to continuously control the handwheel 5 to fix the position of the first push rod 14, which is convenient and labor-saving.

[0029] Preferably, a second spring 20 is provided between one side of the stop rod 18 and the inner wall of the main body 1. The second spring 20 is parallel to the horizontal length direction of the sliding groove 17. Under the action of the second spring 20, the stop rod 18 is always pushed towards the vertical axis direction of the striker plate 15. It can directly push the stop rod 18 below the striker plate 15 after the striker plate 15 moves above the stop rod 18 under the action of the second spring 20, playing a role in assisting the pushing of the stop rod 18, which is more convenient and labor-saving.

[0030] Preferably, a ball spring 21 is provided on the outer side of the bottom of the main body 1. There is a horizontal through hole at the bottom of the main body. Two balls are slidably arranged at both ends in the through hole. A spring is arranged in the through hole, and both ends of the spring respectively abut against the two balls. On both inner side walls of the cap 12, there are card slots 22 that can be respectively engaged with the two balls of the ball spring 21, which is convenient for the disassembly of the cap 12 and can also ensure the firmness after the cap 12 is buckled with the bottom of the main body 1.

[0031] Preferably, one end of the connecting shaft 4 is provided with an insertion block 23, and a slot 24 for inserting the insertion block 23 is provided on one side of the handwheel 5, making the handwheel 5 detachable, reducing the volume of the device after disassembly, facilitating storage and carrying, and the slot 24 is replaceable. If the slot surface of the slot 24 is severely worn, it can be replaced, avoiding the replacement of the entire handwheel 5 and facilitating the saving of maintenance costs.

[0032] Preferably, a crank 25 is inserted into the handwheel 5. In this patent, a pin is used as the crank 25. The pin is inserted between the groove of the handwheel 5 and the groove of the slot 24 to ensure the synchronous rotation of the handwheel 5 and the slot 24, facilitating the rotation of the handwheel 5, and the inserted crank 25 is detachable, facilitating storage and carrying and convenient to use.

[0033] Preferably, a mounting block 26 is detachably embedded on one side of the main body 1, and the metering dial 9 is pullable and arranged on the mounting block 26. One end of the mounting block 26 is rotatably connected to the main body 1, and the other end of the mounting block 26 is detachably connected to the main body 1 through a spring component, so that one end of the mounting block 26 can be rotated around the main body 1 after being removed, which facilitates the installation and replacement of the metering dial 9 and meets the use requirements of dosing with different liquid medicine dosages.

[0034] When using this patent, first turn the hand wheel 5 to make the first push rod 14 drive the striker 15 to move up and squeeze the first spring 16. When the striker 15 moves to the top of the stop rod 18, the stop rod 18 is pushed under the action of the second spring 20 so that the stop rod 18 is blocked under the striker 15 to limit the position of the striker 15. Then, according to the amount of medicine added, a certain length of the metering dial 9 is pulled, and the dial wheel 8 is rotated to drive the second push rod 7 to press the piston of the liquid storage cylinder 3, so that the liquid in the liquid storage cylinder 3 passes through the medicine guide shell 10 and the medicine guide tube 11 is injected into the syringe 2, and then the medicine guide shell 10 at the bottom of the syringe 2 is removed. The blocking rod 18 is moved by the slider 19 to rotate the blocking rod 18 in the direction of the second spring 20 and squeeze the second spring 20. After the blocking rod 18 is moved away from the bottom of the striker 15, the striker 15 is pushed by the first spring 16 to hit the piston rod 6, and the medicine liquid in the syringe 2 is ejected and injected into the patient's body, completing the injection; then the metering dial 9 is pulled in the opposite direction to add medicine to the liquid storage cylinder 3 for the next injection.

[0035] This product is convenient for ordinary patients to operate and use, and is simple and quick to operate. The amount of medicine added to the syringe barrel 2 is controlled by pulling the length of the metering dial 9, which can meet the needs of blind patients to control the extraction of the injection amount suitable for themselves, so that blind patients can also operate the dosing and injection process by themselves without the assistance of others, reducing the workload of nursing staff and being easy to promote and use.

Claims

1. A liquid filling and injection device, characterized in that: The invention comprises a main body (1), wherein an injection cylinder (2) and a liquid storage cylinder (3) are respectively provided at the bottom of the main body (1), the bottom of the injection cylinder (2) passes through the main body (1), a hand wheel (5) is provided on one side of the main body (1) for rotation via a connecting shaft (4), and a striker mechanism is provided in the main body (1) at a position above the injection cylinder (2) and is connected to the connecting shaft (4) in a transmission manner, and the striker mechanism is used to strike the piston rod (6) of the injection cylinder (2); A second push rod (7) is slidably provided in the main body (1) and at a position above the liquid storage cylinder (3); a dial wheel (8) is rotatably provided in the main body (1); the second push rod (7) passes through the dial wheel (8) and is threadedly connected to the dial wheel (8); the bottom end of the second push rod (7) contacts the piston in the liquid storage cylinder (3); a metering dial (9) that can be pulled out laterally is provided on one side of the main body (1); the dial wheel (8) is toggled by the metering dial (9); and the pulling length of the metering dial (9) is proportional to the amount of medicine discharged from the liquid storage cylinder (3); The bottom of the injection cylinder (2) and the bottom of the liquid storage cylinder (3) are both detachably covered with a drug guide shell (10), the two drug guide shells (10) are connected through a drug guide tube (11), and the bottom of the main body (1) is detachably provided with a cap (12); The striker mechanism includes a gear (13) arranged on the connecting shaft (4), a first push rod (14) is slidably provided in the main body (1), a tooth meshing with the gear (13) is provided on one side of the first push rod (14), a strike plate (15) is provided at the bottom end of the first push rod (14), and a first spring (16) is sleeved on the outside of the first push rod (14) located above the strike plate (15); A limiting mechanism cooperating with the striker mechanism is provided in the main body (1), and the position of the striker mechanism is limited by the limiting mechanism. When the limiting mechanism is released, the striker mechanism can strike the piston rod (6).

2. The liquid filling and injection device according to claim 1, characterized in that: The limiting mechanism comprises a slide groove (17) arranged on one side of the main body (1), a blocking rod (18) is slidably provided in the slide groove (17), one end of the blocking rod (18) passes through the slide groove (17) and is hinged to the inside of the main body (1), and a slider (19) is provided at one end of the blocking rod (18) located outside the main body (1).

3. The liquid filling and injection device according to claim 2, characterized in that: A second spring (20) is provided between one side of the blocking rod (18) and the inner wall of the main body (1), and the second spring (20) is parallel to the horizontal length direction of the sliding groove (17).

4. The liquid filling and injection device according to claim 1, characterized in that: A ball spring (21) is provided on the outer side of the bottom of the main body (1), and a slot (22) capable of engaging with the ball spring (21) is provided on the inner wall of the cover cap (12).

5. The liquid filling and injection device according to claim 1, wherein: An insert block (23) is provided at one end of the connecting shaft (4), and a slot (24) for plugging into the insert block (23) is provided at one side of the hand wheel (5).

6. The liquid filling and injection device according to claim 1, characterized in that: A crank handle (25) is plugged into the hand wheel (5).

7. The liquid filling and injection device according to claim 1, characterized in that: A mounting block (26) is detachably embedded on one side of the main body (1), and the metering dial (9) is drawable and arranged on the mounting block (26).

Images