Subcutaneous injection auxiliary device

Abstract

The utility model discloses a subcutaneous injection auxiliary device which comprises a needle cylinder, a detachable side cover, an automatic booster, a clamping piece and an adjustable sleeve. A pre-filled syringe is placed in the needle cylinder, and a needle head of the pre-filled syringe extends out of the front end of the needle cylinder; the clamping piece is arranged on the inner wall of the needle cylinder and is used for fixing the pre-filled syringe; the automatic booster is arranged at the inner rear end of the needle cylinder, meanwhile, an injection button is arranged on the outer end face of the rear end of the needle cylinder and used for starting the automatic booster, a piston handle clamping part is arranged at the front end of the automatic booster, and the piston handle clamping part can manually move forwards to be matched with a piston handle of the pre-filled syringe; the detachable side cover is detachably connected with the cylinder wall of the needle cylinder; the adjustable sleeve is arranged at the front end of the needle cylinder, and the extending length is adjustable. The self-service subcutaneous injection auxiliary device can assist home persons in completing subcutaneous injection through self-service operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a hypodermic injection auxiliary device. BACKGROUND

[0002] Standardized anticoagulant therapy management is the key to prevent and treat thrombotic diseases during pregnancy. Low molecular weight heparin does not penetrate the placental barrier, has a long half-life, durable effect, good safety performance and other advantages, and becomes the preferred drug for the prevention and treatment of perinatal thrombotic diseases. Since the drug needs to be injected for a long time, it is often completed at home. However, improper injection operation can easily cause injection site ecchymosis, induration, bleeding, local pain and other symptoms, reduce drug compliance, affect the effect of anticoagulant therapy, and even force pregnant women to frequently visit the hospital, increasing the consumption of medical resources.

[0003] At present, the recommended needle length for subcutaneous injection of pregnant women refers to the non-pregnant population. It is generally recommended to use a short needle with a needle length of 5-6 mm for vertical injection, and it is also recommended to use a needle with a length of 4-5 mm. When the needle length is greater than or equal to 6 mm, the skin must be pinched or injected at a 45-degree angle, otherwise the risk of muscle injection will be significantly increased. In order to effectively prevent drug overflow or exosmosis, pre-filled anticoagulants generally use "air lock" structure, but the prerequisite for its implementation is vertical injection. However, the needle length used at present is more than 10 mm, and the skin must be pinched and the pen is held vertically for slow injection, but this operation method is difficult for pregnant women to learn by themselves. In addition, studies have shown that pinching the skin can double the distance between the abdominal skin and muscle, but it is sometimes difficult to raise the skin fold on the thigh, and the average distance between the skin and muscle may only increase by 20%, and some pregnant women still cannot achieve the appropriate subcutaneous fat thickness after pinching the skin.

[0004] At present, there is still a lack of injection auxiliary device for pre-filled needle injection that matches the subcutaneous fat thickness of pregnant women, increasing the difficulty of operation for pregnant women. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a subcutaneous injection auxiliary device which can assist self-operation of home users to complete subcutaneous injection.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] A subcutaneous injection auxiliary device, comprising a needle cylinder, a detachable side cover, an automatic booster, a clamping piece and an adjustable sleeve.

[0008] The pre-filled syringe is placed in the needle cylinder, and the needle of the pre-filled syringe is protruded from the front end of the needle cylinder; the clamping piece is arranged on the inner wall of the needle cylinder and is used for fixing the pre-filled syringe; the automatic booster is arranged at the rear end in the needle cylinder, and a push button is arranged on the outer end surface of the rear end of the needle cylinder and is used for starting the automatic booster; the front end of the automatic booster is provided with a piston handle clamping part, and the piston handle clamping part can be manually moved forward and is matched with the piston handle of the pre-filled syringe; the detachable side cover is detachably connected with the cylinder wall of the needle cylinder; and the adjustable sleeve is arranged at the front end of the needle cylinder and can be adjusted in length.

[0009] Further, the detachable side cover is connected with the cylinder wall of the needle cylinder through a buckle structure.

[0010] Further, the front end of the needle cylinder is provided with an annular groove, the annular groove extends along the axial direction of the needle cylinder, the adjustable sleeve is inserted into the annular groove and is matched with the inner wall of the annular groove in a threaded manner, and the adjustable sleeve is provided with a scale.

[0011] Further, the front end of the needle cylinder is further provided with a needle protection sleeve, the front end of the needle protection sleeve is open, the needle protection sleeve is coaxially arranged on the inner side of the adjustable sleeve, the needle protection sleeve exceeds the adjustable sleeve, and the needle protection sleeve is retracted to the same horizontal position as the adjustable sleeve after being pressed.

[0012] Further, the surface of the clamping piece is rubber.

[0013] Further, the clamping distance of the clamping piece is variable, and the clamping piece is used for clamping pre-filled syringes of different sizes.

[0014] Beneficial effects:

[0015] 1. The utility model can assist in controlling the needle insertion depth, automatically pushes and injects through the automatic booster, solves the difficulty of single-handed vertical pen type injection operation of home users, and improves the convenience and safety of home subcutaneous injection.

[0016] 2. The detachable side cover of the utility model is connected with the cylinder wall of the needle cylinder through a buckle structure, and installation and dismounting are fast.

[0017] 3. The front end of the needle cylinder of the utility model is further provided with a needle transparent protection sleeve for protecting the needle. DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model.

[0019] Figure 2 It is a structure schematic view of the adjustable sleeve.

[0020] Among them, 1-needle cylinder, 2-dismountable side cover, 3-push button, 4-clamping piece, 5-adjustable sleeve, 6-needle protection sleeve, 7-rotary knob. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] This invention provides a subcutaneous injection auxiliary device, such as... Figure 1 As shown, it includes a syringe 1, a removable side cover 2, an automatic booster, a clamping component 4, and an adjustable cannula 5.

[0023] The syringe 1 is used to hold a pre-filled syringe. The needle of the pre-filled syringe extends from the front end of the syringe 1, and the syringe barrel is stopped by the inner wall of the front end of the syringe 1. The clamp 4 is set on the inner wall of the syringe 1 to fix the pre-filled syringe. The automatic booster is set at the rear end of the syringe 1, and the outer end face of the rear end of the syringe 1 is provided with a push button 3 to activate the automatic booster. The front end of the automatic booster is provided with a piston handle engagement part, which can be manually moved forward to adapt to the piston handle of the pre-filled syringe. The detachable side cover 2 is detachably connected to the barrel wall of the syringe 1. The adjustable sleeve 5 is set at the front end of the syringe 1, and the extension length is adjustable.

[0024] The automatic injector is existing technology, such as an electric injector. Its principle is that an electric motor drives a screw, which in turn moves a piston handle to eject the medication from the syringe 1. The electric injector consists of an electric motor, a screw, and a controller. When the electric motor starts, the screw rotates, moving the piston handle to propel the medication forward in the syringe 1, thus achieving injection. The controller can control the speed and direction of the electric motor to precisely control the injection volume and speed.

[0025] Specifically, the detachable side cover 2 is connected to the barrel wall of the syringe 1 by a snap-fit ​​structure, which makes it easy to remove the side cover and insert a pre-filled syringe into the syringe 1.

[0026] The syringe barrel 1 has an annular groove at its front end, extending axially along the barrel 1. An adjustable sleeve 5 is inserted into this groove, threaded into the inner wall of the groove. The insertion depth of the pre-filled syringe needle is adjusted by screwing the adjustable sleeve 5 into and out of the annular groove. The figure shows the two states of the adjustable sleeve 5 being screwed in and out. The annular groove has an external thread, and the adjustable sleeve 5 has an internal thread on its inner wall. Figure 2 As shown, the adjustable sleeve 5 has a scale for determining the unscrewing length.

[0027] In another embodiment, a push-pull button is provided on the outer wall of the syringe 1 to drive the adjustable sleeve 5 to extend or retract, and the adjustable sleeve 5 can be limited after it extends or retracts.

[0028] As an improvement, the needle cylinder 1 is further provided with a needle protection sleeve 6 at the front end, which is open at the front end, nested inside the adjustable sleeve 5 and coaxially arranged, and the needle protection sleeve 6 is a transparent flexible bellows. When the hypodermic injection auxiliary device is pressed for injection, the needle protection sleeve 6 is pressed and retracted to the same horizontal position as the adjustable sleeve 5 when it contacts the body. When the injection is completed and the body is not in contact, the needle protection sleeve 6 will immediately rebound and expand to protect the needle from needle stick injury.

[0029] In another embodiment, the needle protection sleeve 6 can also be a sleeve, which is provided with a spring and a guide column between the sleeve and the front end of the needle cylinder 1. Before injection, the sleeve extends out of the adjustable sleeve 5, and the sleeve is compressed to compress the spring and retract along the guide column until it is located at the same horizontal position as the adjustable sleeve 5. The guide column is axially parallel to the needle cylinder 1.

[0030] The clamping distance of the clamping member 4 is variable, which is used to clamp pre-filled syringes of different sizes to achieve the effect of fixing the needle body. The surface of the clamping member 4 is rubber, which has a buffering effect and protects the needle body from being crushed. The clamping member 4 in the figure is only a position indication, and there are various clamping mechanisms in the prior art that can achieve this function, such as including two clamping pieces and an elastic connecting structure, the two clamping pieces rotate coaxially to achieve the opening and closing of the whole, and the opening angle can also be adjusted to adapt to different thicknesses of the needle body.

[0031] In use, open the detachable side cover 2, put the pre-filled syringe into the needle cylinder 1, manually clamp the piston handle clamping part at the front end of the automatic booster and the piston handle of the pre-filled syringe together, and then buckle the detachable side cover 2; adjust the extension length of the adjustable sleeve 5 to ensure that the exposed length of the needle (referring to the length exposed from the adjustable sleeve 5) meets the injection requirements, hold the hypodermic injection auxiliary device vertically and press it towards the injection site of the body, at the same time the needle protection sleeve 6 is forced to retract until the adjustable sleeve 5 is limited by contacting the body, and then the automatic injection can be completed by pressing the injection button 3.

[0032] In summary, the above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hypodermic injection aid characterized in that, The needle cylinder, detachable side cover, automatic booster, clamping piece and adjustable sleeve are included. The pre-filled syringe is placed in the needle cylinder, and the needle of the pre-filled syringe is extended from the front end of the needle cylinder; the clamping piece is arranged on the inner wall of the needle cylinder and used for fixing the pre-filled syringe; the automatic booster is arranged at the rear end of the needle cylinder, and a push button is arranged on the outer end surface of the rear end of the needle cylinder and used for starting the automatic booster; the front end of the automatic booster is provided with a piston handle clamping part, which can be manually moved forward and matched with the piston handle of the pre-filled syringe; the detachable side cover is detachably connected with the cylinder wall of the needle cylinder; and the adjustable sleeve is arranged at the front end of the needle cylinder and can be adjusted in length.

2. The hypodermic injection aid of claim 1, wherein, The detachable side cover is connected with the cylinder wall of the needle cylinder through a buckle structure.

3. The hypodermic injection aid of claim 1 wherein, The front end of the needle cylinder is provided with an annular groove which extends along the axial direction of the needle cylinder, and the adjustable sleeve is inserted into the annular groove and threadedly matched with the inner wall of the annular groove; and the adjustable sleeve is provided with a scale.

4. The hypodermic injection aid of claim 1 or 3, wherein, The front end of the needle cylinder is also provided with a needle protection sleeve, the front end of the needle protection sleeve is open, the needle protection sleeve is nested on the inner side of the adjustable sleeve and coaxially arranged with the adjustable sleeve, the needle protection sleeve exceeds the adjustable sleeve, and is retracted to the same horizontal position as the adjustable sleeve after being pressed; and the needle protection sleeve is a flexible bellows.

5. The hypodermic injection aid of claim 1 wherein, The surface of the clamping piece is rubber.

6. The hypodermic injection aid of claim 5, wherein, The clamping distance of the clamping piece is variable, and the clamping piece is used for clamping pre-filled syringes of different sizes.

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