Injector for growth hormone powder

Abstract

The utility model discloses an injector for growth hormone powder, which comprises a needle cylinder, the front end of the needle cylinder is in threaded connection with a replaceable needle head, the rear end of the needle cylinder is fixedly provided with a limiting sleeve seat, a metering groove is arranged in the limiting sleeve seat, the rear end of the limiting sleeve seat is connected with a quantitative extraction mechanism, and the quantitative extraction mechanism is connected with a quantitative control device. A piston body is installed at the front end of the quantitative extraction mechanism and is in sliding connection with the inner wall of the needle cylinder. The injector for the growth hormone powder is provided with the quantitative extraction mechanism, a piston rod in the quantitative extraction mechanism rotates outwards to drive a piston body to move in a needle cylinder, and when the piston rod in the quantitative extraction mechanism rotates and moves, the piston rod can drive a scale groove to rotate and move synchronously; at the moment, a metering groove in the limiting sleeve seat can be matched with a displayed scale groove to accurately extract growth hormone powder liquid, and waste caused by misoperation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, in particular to a syringe for growth hormone powder. Background Technique

[0002] In the current field of pediatric medicine, recombinant human growth hormone is widely used to treat diseases such as growth hormone deficiency, idiopathic short stature, congenital ovarian hypoplasia, Prader-Willi syndrome, small for gestational age infants, and chronic kidney disease, so as to promote the height growth of children. At present, the growth hormone dosage forms on the market in China include freeze-dried powder, short-acting aqueous solution, and long-acting aqueous solution. Since growth hormone needs to be used for a long time and the price is relatively high, for families with average economic conditions, the freeze-dried powder becomes a more economical choice. However, the use of freeze-dried powder is relatively inconvenient. It is necessary to mix the freeze-dried powder with injection water through a syringe before injection and then inject. And there are still certain defects in the existing syringes during use.

[0003] For example, an automatic injection pen for growth hormone powder proposed in the application number CN202222979409.5 includes a syringe. The syringe includes a barrel, a needle head, and a piston rod. It also includes a housing and a power mechanism arranged in the housing. The housing is a columnar structure. A first groove for installing and fixing the syringe is arranged in the housing, and the needle head extends to the outside of the housing; the power mechanism is used to drive the piston rod to stretch relative to the barrel; the power mechanism includes a motor, a driving gear connected to the motor, a driven gear meshing with the driving gear, and a lead screw. One end of the lead screw is connected to the piston rod through a clamping plate. In the actual use process, when injecting the growth hormone powder solution, the automatic injection pen uses the power mechanism to realize the automatic stretching of the piston rod to complete the extraction and injection work. However, such production cost is too high and it is easy to cause inability to inject due to power factors, reducing the practicability. At the same time, when using the power mechanism to extract the growth hormone powder solution, it is easy to cause the phenomenon of excessive extraction due to untimely control, which will cause waste.

[0004] Therefore, we propose a syringe for growth hormone powder to solve the problems mentioned above. Content of the Utility Model

[0005] The purpose of the utility model is to provide a syringe for growth hormone powder to solve the problems of high production cost, easy influence due to power factors, and easy waste due to untimely control during the extraction of growth hormone powder solution mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A syringe for growth hormone powder, including a barrel,

[0007] A contamination prevention mechanism is installed at the front end of the syringe barrel.

[0008] A limit sleeve seat is fixedly installed at the rear end of the syringe barrel. A measuring groove is formed inside the limit sleeve seat. A quantitative extraction mechanism is connected to the rear end of the limit sleeve seat. A piston body is installed at the front end of the quantitative extraction mechanism. The piston body is slidably connected to the inner wall of the syringe barrel.

[0009] Injection trigger mechanisms are installed on both sides of the syringe barrel. The rear end of the injection trigger mechanism is fixedly connected to an injection pressing plate.

[0010] Preferably, the quantitative extraction mechanism includes a fixed sleeve seat fixedly installed at the rear end of the limit sleeve seat. A fixed block is fixedly installed at the top of the inner wall of the fixed sleeve seat. A piston rod is slidably connected inside the fixed sleeve seat. A spiral groove is formed on the surface of the piston rod. The spiral groove is in fit with the fixed block. A scale groove is also formed on the surface of the piston rod. The front end of the piston rod is rotatably connected to the piston body. A knob is fixedly installed at the rear end of the piston rod. A button is rotatably installed at the rear end of the knob.

[0011] Preferably, when the piston rod rotates, it drives the spiral groove to cooperate with the fixed block and the fixed sleeve seat to form a spiral telescopic structure. The scale grooves are spirally and equally spaced on the surface of the piston rod.

[0012] With the design of the above structure, by externally rotating the piston rod, it rotates and moves inside the fixed sleeve seat in cooperation with the fixed block, and drives the scale groove and the piston body to move outwards. It is beneficial to use the contamination prevention mechanism at the front end to extract the growth hormone powder solution at this time. The setting of the measuring groove can correspond to the rotating and moving scale groove, so as to facilitate the control of the screwing-out length of the piston rod and the piston body, which is beneficial to accurately quantitatively extract the growth hormone powder solution, improving the medicine-taking accuracy of the syringe for growth hormone powder and avoiding waste.

[0013] Preferably, the injection trigger mechanism includes a first connection seat fixedly sleeved on the outer circle of the rear part of the syringe barrel. Damping rubber sleeves are fixedly embedded inside both ends of the first connection seat. A connecting rod is slidably penetrated inside the damping rubber sleeves. A baffle is fixedly installed at the front end of the connecting rod. A spring is sleeved on the connecting rod between the baffle and both ends of the first connection seat. The rear end of the connecting rod is fixedly connected to the injection pressing plate. A second connection seat is fixedly sleeved on the outer circle of the front part of the syringe barrel. Limit grooves are formed inside both ends of the second connection seat. A movable seat is slidably connected inside the limit grooves. A control plate is fixedly connected to the outer end of the movable seat. A clamping block is fixedly installed on the inner side of the control plate.

[0014] Preferably, the connecting rod and the first connecting seat form a damping sliding structure through a damping rubber sleeve, and the connecting rod and the baffle form a telescopic structure with both ends of the first connecting seat through a spring.

[0015] Preferably, the control board and the limiting groove and the second connecting seat form a limiting sliding structure through a movable seat, and the control board is movably clamped and connected with the baffle through a clamping block.

[0016] With the design of the above structure, after the growth hormone powder solution is quantitatively extracted, by triggering the injection trigger mechanism, the injection trigger mechanism can cooperate with the injection pressing plate to apply a screw-in pressure to the piston rod and the piston body, realizing the automatic injection of the growth hormone powder solution, improving the use convenience, and at the same time reducing the production cost and the adaptability of the use environment.

[0017] Preferably, the anti-pollution mechanism includes a threaded valve seat installed at the front end of the syringe barrel. The outer ring of the threaded valve seat is threadedly connected with a medicine placing tube. The front end of the medicine placing tube is fixedly installed with a mounting seat. A replaceable needle is threadedly connected to the mounting seat. A rubber ring is slidably sleeved on the outer ring of the medicine placing tube. The front end of the rubber ring is fixedly connected with a protective cylinder.

[0018] With the design of the above structure, the medicine placing tube in the anti-pollution mechanism can be conveniently disassembled and assembled, thereby preventing the liquid medicine from entering the syringe barrel and causing cross-contamination during recycling. The protective cylinder can slide and be positioned on the surface of the medicine placing tube through the rubber ring, which is beneficial to expose and hide the detachable needle. When exposed, it is convenient for injection, and when hidden, it can effectively protect the detachable needle.

[0019] Compared with the prior art, the beneficial effects of the present utility model are: the syringe for growth hormone powder;

[0020] 1. It is provided with a quantitative extraction mechanism. By externally rotating the piston rod in the quantitative extraction mechanism, the piston body can be driven to move inside the syringe barrel. When the piston rod rotates and moves in the quantitative extraction mechanism, the scale groove will also rotate and move synchronously. At this time, the metering groove inside the limit sleeve seat can cooperate with the displayed scale groove to accurately extract the growth hormone powder solution, avoiding waste caused by improper operation, and improving the accuracy and use effect of the syringe for growth hormone powder;

[0021] 2. An injection trigger mechanism is provided. After the metering extraction mechanism cooperates with the piston body to quantitatively extract the growth hormone powder solution, through manual control of the injection trigger mechanism, the injection trigger mechanism can cooperate with the injection pressing plate to drive the piston rod to rotate and move inward, and drive the piston body to automatically inject the growth hormone powder solution extracted inside the medicine placement tube, improving the operation convenience. At the same time, the production cost of the manually operated structure is reduced, and the phenomenon of inability to inject due to power factors will not occur, improving the adaptability to the use environment;

[0022] 3. A pollution prevention mechanism is provided. In the pollution prevention mechanism, the medicine placement tube and the syringe are designed to be detachable, which can prevent the liquid medicine from entering the inside of the syringe and causing cross-contamination during recycling. At the same time, the protective cylinder in the pollution prevention mechanism can slide and be positioned on the surface of the medicine placement tube through a rubber ring, so as to facilitate the hiding and exposure of the detachable needle, improving the injection convenience of the detachable needle, and can reduce the fear of children seeing the needle during injection, reducing the psychological pain of children. Description of the Drawings

[0023] Figure 1 It is a schematic side view external structure diagram of the present utility model;

[0024] Figure 2 It is a schematic connection structure diagram of the syringe side section and the metering extraction mechanism of the present utility model;

[0025] Figure 3 It is a schematic side section structure diagram of the metering extraction mechanism of the present utility model;

[0026] Figure 4 It is a schematic connection structure diagram of the metering extraction mechanism and the injection trigger mechanism of the present utility model;

[0027] Figure 5 It is a schematic side section structure diagram of the injection trigger mechanism of the present utility model;

[0028] Figure 6 It is a schematic side section structure diagram of the pollution prevention mechanism of the present utility model.

[0029] In the figure: 1. Syringe barrel; 2. Anti-pollution mechanism; 201. Threaded valve seat; 202. Medicine placement tube; 203. Mounting seat; 204. Replaceable needle; 205. Rubber ring; 206. Protective cylinder; 3. Limit sleeve seat; 4. Measuring groove; 5. Quantitative extraction mechanism; 501. Fixed sleeve seat; 502. Fixed block; 503. Piston rod; 504. Spiral groove; 505. Scale groove; 506. Knob; 507. Button; 6. Piston body; 7. Injection trigger mechanism; 701. First connection seat; 702. Damping rubber sleeve; 703. Connecting rod; 704. Baffle; 705. Spring; 706. Second connection seat; 707. Limit groove; 708. Movable seat; 709. Control board; 710. Block; 8. Injection pressing plate. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-5 , the present invention provides a technical solution: A syringe for growth hormone powder includes a syringe barrel 1, and an anti-pollution mechanism 2 is installed at the front end of the syringe barrel 1. The anti-pollution mechanism 2 includes a threaded valve seat 201 installed at the front end of the syringe barrel 1. The outer ring of the threaded valve seat 201 is threadedly connected to a medicine placement tube 202. The front end of the medicine placement tube 202 is fixedly installed with a mounting seat 203. A replaceable needle 204 is threadedly connected to the mounting seat 203. A rubber ring 205 is slidably sleeved on the outer ring of the medicine placement tube 202. The front end of the rubber ring 205 is fixedly connected to a protective cylinder 206;

[0032] With the design of the above structure, when injection is not performed, the rubber ring 205 is located on the front surface of the medicine placement tube 202. At this time, the protective cylinder 206 corresponding to the rubber ring 205 will wrap and hide the replaceable needle 204, and can reduce the fear of children seeing the needle during injection, and reduce the psychological pain of children. When injecting, by pulling the protective cylinder 206, it drives the rubber ring 205 to retreat and position on the surface of the medicine placement tube 202 until the replaceable needle 204 is completely exposed, so as to facilitate the subsequent injection insertion work.

[0033] A limit sleeve seat 3 is fixedly installed at the rear end of the syringe barrel 1. A metering groove 4 is formed inside the limit sleeve seat 3. The rear end of the limit sleeve seat 3 is connected with a quantitative extraction mechanism 5. A piston body 6 is installed at the front end of the quantitative extraction mechanism 5. The piston body 6 is slidably connected with the inner wall of the syringe barrel 1. The quantitative extraction mechanism 5 includes a fixed sleeve seat 501 fixedly installed at the rear end of the limit sleeve seat 3. A fixed block 502 is fixedly installed at the top of the inner wall of the fixed sleeve seat 501. A piston rod 503 is slidably connected inside the fixed sleeve seat 501. A spiral groove 504 is formed on the surface of the piston rod 503. The spiral groove 504 is in contact with the fixed block 502. When the piston rod 503 rotates, it drives the spiral groove 504 to cooperate with the fixed block 502 and the fixed sleeve seat 501 to form a spiral telescopic structure. A scale groove 505 is also formed on the surface of the piston rod 503. The scale grooves 505 are distributed at equal intervals in a spiral manner on the surface of the piston rod 503. The front end of the piston rod 503 is rotatably connected with the piston body 6. A knob 506 is fixedly installed at the rear end of the piston rod 503. A button 507 is rotatably installed at the rear end of the knob 506;

[0034] The design of the above structure enables the rotation of the knob 506 to drive the piston rod 503 to rotate on one side of the piston body 6. During the rotation of the piston rod 503, it drives the spiral groove 504 to move in a spiral manner within the inner ring of the fixed sleeve seat 501 in cooperation with the limit of the fixed block 502. This is beneficial for driving the scale groove 505 to rotate and move synchronously during external rotation, and enables the scale groove 505 during rotational movement to be accurately displayed in a single group in the metering groove 4 formed inside the limit sleeve seat 3. Thus, it is convenient to control the screwing-out distance of the piston rod 503 and the piston body 6 according to the scale groove 505 corresponding to the required dose, which is beneficial for accurately quantitatively extracting the growth hormone powder solution with the replaceable needle 204, medicine placement tube 202, and mounting seat 203 at the front end and storing it inside the medicine placement tube 202, improving the medicine-taking accuracy and operation convenience of the syringe for growth hormone powder. The setting of the medicine placement tube 202 can prevent the growth hormone powder solution from entering the inside of the syringe barrel 1, and at the same time, the medicine placement tube 202 can be replaced after a single injection, effectively preventing cross-contamination caused by multiple uses inside the syringe barrel 1;

[0035] It should be noted that before injecting the growth hormone powder, it is necessary to dissolve the growth hormone powder with a dilution solution to obtain the growth hormone powder solution for injection work.

[0036] On both sides of the syringe barrel 1, an injection trigger mechanism 7 is installed. A rear end of the injection trigger mechanism 7 is fixedly connected to an injection pressing plate 8. The injection trigger mechanism 7 includes a first connecting seat 701 fixedly sleeved on an outer circle of a rear part of the syringe barrel 1. Inside both ends of the first connecting seat 701, damping rubber sleeves 702 are fixedly embedded. A connecting rod 703 slidably penetrates through the inside of the damping rubber sleeve 702. The connecting rod 703 and the first connecting seat 701 form a damping sliding structure through the damping rubber sleeve 702. A baffle 704 is fixedly installed at a front end of the connecting rod 703. A spring 705 is sleeved on the connecting rod 703 between the baffle 704 and both ends of the first connecting seat 701. The connecting rod 703 and the baffle 704 form a telescopic structure with both ends of the first connecting seat 701 through the spring 705. A rear end of the connecting rod 703 is fixedly connected to the injection pressing plate 8. A second connecting seat 706 is fixedly sleeved on an outer circle of a front part of the syringe barrel 1. Inside both ends of the second connecting seat 706, limiting grooves 707 are provided. An activity seat 708 is slidably connected to the inside of the limiting groove 707. An outer end of the activity seat 708 is fixedly connected to a control plate 709. The control plate 709 and the second connecting seat 706 form a limiting sliding structure through the activity seat 708 and the limiting groove 707. A clamping block 710 is fixedly installed on an inner side of the control plate 709. The control plate 709 and the baffle 704 are movably clamped and connected through the clamping block 710;

[0037] With the design of the above structure, before injection, the clamping block 710 and the baffle 704 are in a clamped state, and the spring 705 is in a compressed state. After accurately extracting the growth hormone powder solution, the replaceable needle 204 at the front end is inserted into the injection site. At this time, by pushing the control plate 709 outwards, it drives the activity seat 708 to move outwards in the limiting grooves 707 inside both ends of the second connecting seat 706, and drives the clamping block 710 to release the clamping restriction on the baffle 704. Then, the spring 705 will expand and cooperate with the baffle 704 to drive the connecting rod 703 and the injection pressing plate 8 to move in a reset manner. Due to the setting of the damping rubber sleeves 702 inside both ends of the first connecting seat 701, the connecting rod 703 will drive the injection pressing plate 8 to slide slowly under the damping action. When the injection pressing plate 8 moves to be docked with the button 507, it will squeeze the button 507, and then squeeze the knob 506 and the piston rod 503, so that the piston rod 503 cooperates with the fixed block 502 to rotate and move inside the fixed socket 501, and at the same time drives the piston body 6 to automatically inject the growth hormone powder solution inside the medicine placing tube 202 through the replaceable needle 204. When the piston rod 503 and the knob 506 rotate inwards, they will rotate at the front end of the button 507.

[0038] Thus, a series of operations are completed. Contents not described in detail in this specification belong to the prior art well-known to those skilled in the art.

[0039] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A syringe for growth hormone powder, comprising a syringe barrel (1), characterized in that: A pollution prevention mechanism (2) is installed at the front end of the syringe barrel (1); A limit sleeve seat (3) is fixedly installed at the rear end of the syringe barrel (1). A measurement groove (4) is provided inside the limit sleeve seat (3). A quantitative extraction mechanism (5) is connected to the rear end of the limit sleeve seat (3). A piston body (6) is installed at the front end of the quantitative extraction mechanism (5). The piston body (6) is slidably connected to the inner wall of the syringe barrel (1); Injection trigger mechanisms (7) are installed on both sides of the syringe barrel (1). The rear end of the injection trigger mechanism (7) is fixedly connected to an injection pressing plate (8).

2. The syringe for growth hormone powder according to claim 1, characterized in that: The quantitative extraction mechanism (5) includes a fixed sleeve seat (501) fixedly installed at the rear end of the limit sleeve seat (3). A fixed block (502) is fixedly installed at the top of the inner wall of the fixed sleeve seat (501). A piston rod (503) is slidably connected inside the fixed sleeve seat (501). A spiral groove (504) is provided on the surface of the piston rod (503). The spiral groove (504) fits with the fixed block (502). A scale groove (505) is also provided on the surface of the piston rod (503). The front end of the piston rod (503) is rotatably connected to the piston body (6). A knob (506) is fixedly installed at the rear end of the piston rod (503). A button (507) is rotatably installed at the rear end of the knob (506).

3. The syringe for growth hormone powder according to claim 2, wherein: When the piston rod (503) rotates, the spiral groove (504) cooperates with the fixed block (502) and the fixed sleeve seat (501) to form a spiral telescopic structure. The scale grooves (505) are spirally and equally spaced on the surface of the piston rod (503).

4. The syringe for growth hormone powder according to claim 1, characterized in that: The injection trigger mechanism (7) includes a first connection seat (701) fixedly sleeved on the outer circle of the rear part of the syringe barrel (1). Damping rubber sleeves (702) are fixedly embedded inside both ends of the first connection seat (701). A connecting rod (703) is slidably penetrated inside the damping rubber sleeves (702). A baffle (704) is fixedly installed at the front end of the connecting rod (703). A spring (705) is sleeved on the connecting rod (703) between the baffle (704) and both ends of the first connection seat (701). The rear end of the connecting rod (703) is fixedly connected to the injection pressing plate (8). A second connection seat (706) is fixedly sleeved on the outer circle of the front part of the syringe barrel (1). Limit grooves (707) are provided inside both ends of the second connection seat (706). A movable seat (708) is slidably connected inside the limit grooves (707). The outer end of the movable seat (708) is fixedly connected to a control plate (709). A clamping block (710) is fixedly installed on the inner side of the control plate (709).

5. A syringe for growth hormone powder according to claim 4, characterized in that: The connecting rod (703) forms a damping sliding structure with the first connection seat (701) through the damping rubber sleeves (702). The connecting rod (703) and the baffle (704) form a telescopic structure with both ends of the first connection seat (701) through the spring (705).

6. The syringe for growth hormone powder according to claim 4, characterized in that: The control board (709) forms a limiting sliding structure with the limiting groove (707) and the second connecting seat (706) through the movable seat (708), and the control board (709) is movably and snap-fitted with the baffle (704) through the snap block (710).

7. A syringe for growth hormone powder according to claim 1, characterized in that: The anti-pollution mechanism (2) includes a threaded valve seat (201) installed at the front end of the syringe barrel (1). The outer ring of the threaded valve seat (201) is threadedly connected with a medicine placing tube (202). The front end of the medicine placing tube (202) is fixedly installed with a mounting seat (203). A replaceable needle head (204) is threadedly connected to the mounting seat (203). A rubber ring (205) is slidably sleeved on the outer ring of the medicine placing tube (202), and a protective cylinder (206) is fixedly connected to the front end of the rubber ring (205).

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