CN107497018B - Disposable Pediatric Safety Injection Needles - Google Patents

Abstract

The invention relates to a disposable safe injection needle for children, which can effectively solve the problem of rapid and safe intramuscular injection for children. A long sliding sealing column that slides forward and backward. A needle storage sleeve fixed to the sliding sealing column is arranged between the sliding sleeve and the steel needle. The front end of the storage needle sleeve protrudes from the sliding sleeve. The front ends of the sheath are fixed together and protrude from the cannula at the front end of the needle storage sheath. The steel needle extends into the inner cavity of the needle storage sheath, passes through the sealing column and then extends forward into the inner cavity of the cannula. Within the protection of the needle, it avoids the occurrence of needle stick injury. After the needle is inserted, it is fixed by the positioning cover to prevent shaking. The steel needle is driven by the sliding sleeve to separate from the human body for injection. It is safe, reliable, easy to use, and effective. It is an innovation in the syringe.

Description

Disposable Pediatric Safety Injection Needles

technical field

The invention relates to an injection needle, in particular to a disposable safety injection needle for children.

Background technique

In clinical work, when children are injected intramuscularly, because they do not cooperate with the operation, it is often necessary for the parents to fully position themselves before the operator can inject the drug. However, just after the injection needle enters the muscle, due to sudden pain, the child will involuntarily produce activities such as kicking. This kind of activity will lead to adverse consequences: 1. The range of activity is small, which may cause the position of the syringe needle to change in the muscle, damage the muscle tissue, and aggravate the pain. 2. If the range of activity is large, the needle may come out of the skin, resulting in waste of liquid medicine, and the operator may be injured by a needle. 3. Violent activities cause the needle of the syringe to break. Therefore, the improvement and innovation of children's injection needles is imperative.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a disposable safe injection needle for children, which can effectively solve the problem of rapid and safe intramuscular injection for children.

The technical solution solved by the present invention is a disposable safety injection needle for children, including a syringe, a piston core rod and a steel needle, the piston end of the piston core rod extends into the inner cavity of the syringe from the mouth of the rear end of the syringe, and the steel needle The needle is installed at the front end of the syringe, and the inner chamber of the syringe between the liquid inlet of the steel needle and the piston end of the piston rod forms a negative pressure sliding stroke chamber, and the piston rod slides forward and backward along the length of the inner chamber of the syringe to form a Compression injection structure, the outer side of the steel needle is provided with a sliding sleeve fixedly connected to the front end of the syringe, the steel needle is covered with a sliding sealing column that slides forward and backward along its length, and a sliding sealing column is installed between the sliding sleeve and the steel needle. The needle storage sleeve together, the front end of the storage needle sleeve protrudes from the sliding sleeve, the front surface of the sealing column is connected with the sleeve tube that is fixed with the front end of the storage needle sleeve and protrudes from the front end of the storage needle sleeve, and the steel needle extends into the storage needle sleeve The inner cavity, after passing through the sealing column, extends forward into the inner cavity of the casing, and the outer wall of the needle storage sleeve protruding from the front end of the sliding sleeve is provided with a positioning cover extending radially, and the outer wall of the storage needle sleeve is provided with shrapnel, and the sliding sleeve There are positioning holes corresponding to the shrapnel on the outer wall, and the sliding sleeve is slid forward and backward. When the front end of the sliding sleeve is in contact with the rear end of the positioning cover, the steel needle protrudes from the front end of the casing. When the shrapnel is clamped in the positioning hole, The front end of the steel needle is located in the casing between the sealing column and the positioning cover.

The invention has a novel and unique structure, is simple and reasonable, is easy to produce, and is easy to operate, and solves the problem of intramuscular injection of infants and children in clinical work. At the same time, the needle tip of the steel needle is placed in the protection of the sleeve after injection, avoiding the occurrence of needle stick injuries. After the needle is inserted, it is fixed by the positioning cover to prevent shaking, and the steel needle is driven out of the human body by the sliding sleeve for injection. It is safe, reliable, easy to use, and effective. It is an innovation in the syringe and has good social and economic benefits.

Description of drawings

Fig. 1 is a schematic structural view of the present invention (partial cutaway).

Fig. 2 is a partially enlarged sectional view of the front end of the syringe of the present invention (needle inserted state).

Fig. 3 is a partially enlarged sectional view (injection state) of the front end of the syringe of the present invention.

Detailed ways

The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Given by Figures 1-3, the present invention includes a syringe 1, a piston core rod 2 and a steel needle 3, the piston end 2a of the piston core rod 2 extends into the inner cavity of the syringe cylinder from the mouth of the rear end of the syringe 1, and the steel needle 3 Installed on the front end of the syringe 1, the inner chamber of the syringe between the liquid inlet of the steel needle 3 and the piston end of the piston rod constitutes a negative pressure sliding stroke chamber 1a, and the piston rod slides forward and backward along the length of the inner chamber of the syringe , forming a compressed injection structure, the outer side of the steel needle 3 is provided with a sliding sleeve 7 fixedly connected to the front end of the syringe 1, the steel needle 3 is covered with a sliding sealing column 4 that slides forward and backward along its length, the sliding sleeve 7 and the steel needle 3 There is a storage needle cover 10 fixed with the sliding sealing column 4 between them, the front end of the storage needle cover 10 protrudes from the sliding cover 7, and the front end surface of the sealing column 4 is connected with a needle storage cover 10 which is fixed together with the front end and extends out. The sleeve tube 5 at the front end of the needle storage sleeve, the steel needle 3 extends into the inner cavity of the storage needle sleeve 10, passes through the sealing column 4, and then extends forward into the inner cavity of the sleeve sleeve 5, and extends out of the outer wall of the storage needle sleeve 10 at the front end of the sliding sleeve 7 A positioning cover 6 protruding radially is arranged on the top, a shrapnel 8 is arranged on the outer wall of the needle storage sleeve 10, and a positioning hole 9 corresponding to the shrapnel 8 is arranged on the outer wall of the sliding sleeve 7, and the sliding sleeve is slid forward and backward. 7 When the front end is in contact with the rear end of the positioning cover 6, the steel needle 3 protrudes from the front end of the casing 5, and when the shrapnel 8 is clamped in the positioning hole 9, the front end of the steel needle 3 is located between the sealing column 4 and the positioning cover 6 inside the casing.

In order to ensure the use effect, the front end of the sleeve 5 is in the shape of a neck.

The rear end of the piston core rod 2 is provided with a handle 2b.

The syringe 1 is provided with a scale.

The steel needle 3 is separated from the casing 5 , and the steel needle 3 is separated from the storage needle sleeve 10 .

The cross-sections of the sliding sleeve 7 , the storage needle sleeve 10 and the cannula 5 are all circular, the storage needle sleeve 10 is placed inside the sliding sleeve 7 , and the sleeve 5 is placed inside the needle storage sleeve 10 .

The outer side of the sliding sealing post 4 is in sealing connection with the inner peripheral wall of the needle storage sleeve 10 .

The front end of the positioning cover 6 is flush with the front end of the needle storage sleeve 10 .

The positioning cover 6 is connected with the needle storage sleeve 10 through threads.

The shrapnel 8 is a triangular or columnar shrapnel, which can be controlled by the elasticity of the shrapnel itself, and a spring can also be added. When the shrapnel is not ejected, it is compressed between the sliding sleeve 7 and the needle storage sleeve 10. When the shrapnel slides to the position of the positioning hole , it protrudes outward under the action of its own elastic force or spring elastic force, and is stuck in the positioning hole, so that the sliding sleeve 7 and the storage needle sleeve 10 cannot slide relative to each other. At this time, the front end of the steel needle 3 is located between the sealing column 4 and the positioning cover. In the cannula between 6, stable and safe injection can be carried out.

When the present invention is in use, the piston core rod is pushed to compress the length of the negative-pressure sliding stroke cavity, the liquid inlet end of the steel needle is inserted into the medicine, and the piston core rod is pulled outward, and the length of the negative-pressure sliding stroke cavity increases gradually. Under the action of negative pressure, the suctioned medicine is filled to fill the negative pressure sliding stroke cavity, and the operator holds the needle barrel 1 with the pen in his right hand. At this time, the front end of the sliding sleeve 7 contacts the rear end of the positioning cover 6, and the steel needle 3 extends out of the casing 5 the front end of the puncture site, select the correct position and directly puncture the puncture site. After the needle is inserted, extend the cannula at the front end of the needle storage sheath 10 to enter the human body. The outer diameter of the needle storage sheath is larger than the outer diameter of the cannula. Stop entering, press the positioning cover 6 with the left hand to make it close to the skin, pull out the needle barrel 1 with the right hand, the needle barrel drives the steel needle 3 and the sliding sleeve 7 to slide backward relative to the needle storage sleeve 10 until the outer wall of the storage needle sleeve 10 The shrapnel 8 on the top is clamped in the positioning hole 9 on the side wall of the sliding sleeve 7. At this time, the front end of the steel needle 3 is located in the casing between the sealing column 4 and the positioning cover 6, that is, the steel needle is out of the range of the human body, and the casing Still stay in the child's body, the right hand can push the medicine solution into the child's body through the cannula, the sliding sealing column plays the role of sliding seal to prevent the leakage of the medicine solution. The problem of intramuscular injection for infants and children. At the same time, the needle tip of the steel needle is in the protection of the cannula after injection, and the cannula can be made of polyurethane material of commercially available intravenous indwelling needles. In this way, since the indwelling part is a hose, even children There will be no problem of the needle tip scratching the muscle, which effectively avoids the occurrence of needle stick injury. After the needle is inserted, it is fixed by the positioning cover to prevent shaking, and then the steel needle is driven by the sliding sleeve to separate from the human body for injection, which prevents the medical staff from Or family members and patients are stabbed. It is safe and reliable, easy to use and effective. It is an innovation on the syringe and has good social and economic benefits.

Claims (8)

1. A disposable safety injection needle for children, including a syringe (1), a piston core rod (2) and a steel needle (3), the piston end (2a) of the piston core rod (2) passes through the needle cylinder (1) The mouth of the rear end extends into the inner cavity of the syringe, the steel needle (3) is installed at the front end of the syringe (1), and the inner cavity of the syringe is formed between the liquid inlet of the steel needle (3) and the piston end of the piston core rod. Negative pressure sliding stroke chamber (1a), the piston core rod slides forward and backward along the length of the inner cavity of the syringe, forming a compressed injection structure, which is characterized in that the outer side of the steel needle (3) is fixedly connected with the front end of the syringe (1). The sliding sleeve (7), the steel needle (3) is covered with a sliding sealing column (4) that slides forward and backward along its length, and a sliding sealing column (4) is provided between the sliding sleeve (7) and the steel needle (3). ) and the needle storage sleeve (10) fixed together, the front end of the storage needle sleeve (10) protrudes from the sliding sleeve (7), and the front surface of the sealing column (4) is connected with a Stretch out the cannula (5) at the front end of the needle storage sleeve, the steel needle (3) extends into the inner cavity of the needle storage sleeve (10), passes through the sealing column (4), and then extends forward into the inner cavity of the sleeve (5). The outer wall of the needle storage sleeve (10) at the front end of the sliding sleeve (7) is provided with a positioning cover (6) protruding radially, the outer wall of the storage needle sleeve (10) is provided with shrapnel (8), and the sliding sleeve (7 ) is provided with a positioning hole (9) corresponding to the shrapnel (8) on the outer wall, slide the sliding sleeve back and forth, when the front end of the sliding sleeve (7) contacts the rear end of the positioning cover (6), the steel needle (3) stretches out Out of the front end of the sleeve (5), when the shrapnel (8) is clamped in the positioning hole (9), the front end of the steel needle (3) is located in the sleeve between the sealing column (4) and the positioning cover (6); The outer side of the sliding sealing post (4) is in sealing connection with the inner peripheral wall of the needle storage sleeve (10). 2. The disposable safety injection needle for children according to claim 1, characterized in that the front end of the cannula (5) is in the shape of a neck. 3. The disposable safety injection needle for children according to claim 1, characterized in that a handle (2b) is provided at the rear end of the piston core rod (2). 4. The disposable safety injection needle for children according to claim 1, characterized in that, the syringe (1) is provided with a scale. 5. The disposable safety injection needle for children according to claim 1, characterized in that, the steel needle (3) is separated from the cannula (5), and the steel needle (3) and the storage needle sleeve (10) phase separation. 6. The disposable safety injection needle for children according to claim 1, characterized in that the sections of the sliding sleeve (7), needle storage sleeve (10) and sleeve (5) are all circular, The needle storage sleeve (10) is placed inside the sliding sleeve (7), and the sleeve (5) is placed inside the needle storage sleeve (10). 7. The disposable safety injection needle for children according to claim 1, characterized in that, the front end face of the positioning cover (6) is flush with the front end face of the needle storage sleeve (10). 8. The disposable safety injection needle for children according to claim 1, characterized in that, the positioning cover (6) is connected to the needle storage sleeve (10) through threads.