TWI602591B - Safety needle - Google Patents

Description

Safety needle

The invention relates to a needle for injection, in particular to a safety needle which can effectively cause a needle sticking event and thereby reduce the probability of blood infection.

Blood infection mainly spreads the pathogen to another individual through blood and wound infection. For example, hepatitis B, hepatitis C and acquired immunodeficiency syndrome (AIDS) can be transmitted through blood, and blood infection is common in medical treatment. Caused by the use of injection equipment, as well as the empty window period of donors and recipients during blood donation and blood transfusions.

According to the statistics of the Ministry of Health and Welfare, Taiwan’s nursing staff has nearly 1.2-2.8 needles per person per year. Among them, the contaminated needles (the wounds of the syringes after use) are between 0.7-0.9 times/year, and according to the domestic The foreign research report pointed out that the blood infection caused by needle sticking has an infection rate of about 6-40% for hepatitis B, 0-10% for hepatitis C, and 0.3-0.5% for acquired immunodeficiency syndrome. Therefore, To maintain the safety and health of medical staff, Article 56 of the Republic of China Medical Law stipulates that since the year of 101, the safety needles will be fully provided in proportion every year.

There are many types of safety needles on the market, such as the new patent case of "Safety Needle Structure of Drip Injection Device" of the Republic of China No. M465177, the "Practical Structure of Safe Self-Destructing Syringe" of the People's Republic of China, No. CN203564613, Utility Model Patent Case, Republic of China No. M485055 "Ann The new patent case of the whole syringe and the new patent case of the "Safe Vein Indwelling Needle" of the Republic of China No. M475287.

However, the new patent case of the Republic of China No. M465177 "Safety Needle Structure for Drip Injection Device" is a pull-back safety needle structure, and the utility model patent of the "Improved Structure of Safe Self-Destructing Syringe" of the People's Republic of China No. CN203564613 is a kind of Self-destructive safety needle structure, the two types of pull-back safety needle structure and self-destructive safety needle structure are quite complicated in operation. If the force is applied improperly during operation, it is easy to cause a needle sticking event. In addition, the Republic of China No. M485055 The new "safety syringe" patent case is a safety needle structure using elastic elements or using the elastic principle. When the elastic element is used, the structure is too large, the operation is not easy, and it is easy to stain and cause pain to the patient. Non-good design, in addition, the new patent case of the Republic of China No. M475287 "Safe Vein Indwelling Needle" is a needle-shield safety needle structure. Due to its complicated structure, the needle-shield safety needle structure has a high production cost. Therefore, the general medical site considers the cost, and usually does not choose such a high-cost safety needle structure.

In view of the above-mentioned safety needle type, the inventor of the present invention failed to solve the problem and could not reduce the needle sticking and cost considerations. Therefore, it was improved and innovated by the thought, and after painstaking research, the safety needle was finally successfully developed.

The main object of the present invention is to provide a safety needle which can effectively reduce the incidence of needle sticking events and maintain the safety and health of medical staff.

A secondary object of the present invention is to provide a safety needle having a simple structure and convenient operation.

For the purpose of the present invention, one of the structures of the safety needle of the present invention mainly comprises an injection needle, a syringe and a sleeve, and the front end of the syringe has a needle holder for inserting the injection needle, and the outer edge of the syringe Having at least one guide rail, one side or both sides of the guide rail are provided with a plurality of serrations, the side edges of the serrations respectively have an introduction surface and a retention surface, and the retention surfaces of the serrations are located farther from the front end of the guide rail In the direction of the sleeve, the sleeve is sleeved on the outer edge of the barrel, and the inner wall of the sleeve has a latch, the cassette is received in the guide rail, and the cassette has a function of the serration At least one introduction surface and at least one retention surface.

One of the structures of the safety needle of the present invention is mainly when the medical staff pushes the sleeve toward the front end of the syringe after the injection of the medicament or the blood collection operation is completed, and then the thrust of the medical staff passes through the inner wall of the sleeve. The cassette is moved by the introduction surface of the crucible and the introduction surface of the serration of the guide rail, so that the cassette is moved in the guide rail to move the sleeve to the outer edge of the syringe to cover the injection needle, and the cassette is moved to the cassette. At the forefront of the guide rail, the needle is placed completely inside the sleeve.

1‧‧‧Syringe

11‧‧‧ needle seat

12‧‧‧ rails

121‧‧‧Sawtooth

1212‧‧‧Import

1213‧‧‧ stranded surface

122‧‧‧First section rail

123‧‧‧Second section rail

124‧‧‧third section rail

125‧‧‧Receiving area

2‧‧‧ casing

21‧‧‧Carmen

211‧‧‧榫 import side

212‧‧‧榫榫留面

22‧‧‧Arc hole

23‧‧‧Strengthened ribs

3‧‧‧ reserved slot

31‧‧‧Flexible wall

4‧‧‧Injection needle

1 is a perspective view of the first embodiment; FIG. 2 is an exploded perspective view of the first embodiment; FIG. 3 is a schematic view of the first embodiment; and FIGS. 4A-4C are the first embodiment. FIG. 5A to FIG. 5C are diagrams showing the relative positions of the cassettes and the guide rails of the first embodiment; FIG. 6 is an exploded perspective view of the second embodiment; FIG. Schematic diagram of the embodiment of the card; 8 is an exploded perspective view of the third embodiment; FIGS. 9A-9E are schematic views showing relative positions of the cassette and the guide rail of the third embodiment; FIG. 10 is an exploded perspective view of the fourth embodiment; Fig. 12 is a perspective view showing the relative positions of the cassette and the guide rail of the fifth embodiment; Fig. 13 is a partial sectional view of the sleeve of the fifth embodiment; and Fig. 14 is a sixth embodiment An exploded view of the example.

1 to 5C, which is a first embodiment of a safety needle according to the present invention. In this embodiment, a syringe 1 and a sleeve 2 are mainly included, and the outer edge of the needle seat 11 at the front end of the syringe 1 is sleeved. There is an injection needle 4, and the outer edge of the syringe 1 has a guide rail 12 extending from the front end of the syringe 1 toward the rear end of the syringe 1 with a first segment of the guide rail 122 and near the rear end of the syringe 1. After the second side rail 123 extends to a fixed distance of the side edge of the cylinder 1 , a third section of the rail 124 extends from the rear end of the barrel 1 toward the front end of the barrel 1 to a position close to the front end of the barrel 1 . The sleeve is sleeved on the outer edge of the barrel 1. The end of the sleeve 2 has a latch 21 on the inner wall surface of the sleeve 2, and the cassette 21 is received in the guide rail 12. In addition, the first The segment guide rail 122 and the third segment guide rail 124 have a plurality of serrations 121 on the side or both sides of the front end of the syringe 1, or the first segment guide rail 122 and the third segment guide rail 124 are close to the side or both sides of the syringe 1 The cloth is provided with a plurality of serrations 121, and each of the sides of the serrations 121 has an introduction surface 1212 and a retention surface 1213, and the cassette 21 has at least one pair of the serrations 121. The introduction surface 211 and the at least one stagnation surface 212, wherein the stagnation surface 1213 is perpendicular to the angle between the first segment rail 122 and the third segment rail 124, and the sawtooth 121 on the first segment rail 122 The retention surface 1213 is located farther from the front end of the syringe 1 In the direction, the retaining surface 1213 of the serration 121 on the third segment guide 124 is located closer to the front end of the syringe 1. In addition, in the embodiment, the syringe 1 is located at the position of the serration 121 of the guide rail 12. At least one reserved groove 3 may be disposed on the side or both sides to form an elastic elastic wall 31 between the reserved groove 3 and the guide rail 12.

When the first embodiment of the safety needle of the present invention is used, the medical staff inserts the sleeve 2 from the end of the syringe 1 into the outer edge of the barrel 1 and places the cassette 21 on the first section rail 122. The front end, then the sleeve 2 is pulled toward the rear end of the syringe 1, and the cassette 21 is moved through the weir introduction surface 211 and the introduction surface 1212 of the serration 121, and the sleeve 2 is moved toward the rear end of the syringe 1 to make the needle 4 is exposed from the front end of the sleeve 2 for the medical personnel to perform an injection or liquid take-up action, and after the injection or liquid withdrawal is completed, the medical staff can rotate the sleeve 2 or the syringe 1 to pass the cassette 21 through the second guide rail. 123 enters the third segment guide 124, and then pushes the sleeve 2 toward the front end of the barrel 1, so that the cassette 21 is moved by the third segment guide 124 near the end of the barrel 1 to move the sleeve 2 toward the front end of the barrel 1. The sleeve 2 is re-covered by the injection needle 4, and at the same time, the retaining surface 1213 of the serration 121 of the third-section guide rail 124 abuts against the quasi-retaining surface 212 of the cassette 21, so that the sleeve 2 can no longer be moved. The second guide rail 123 is pushed in the direction to avoid leakage of the injection needle 4. In addition, when the cassette 21 passes through the serration 121 provided on the guide rail 12, the guide is made When the surface 211 acts on the introduction surface 1212 of the serration 121, the cassette 21 and the serration 121 are pressed against each other, and the cassette 21 and the serration 121 are moved in opposite directions. At this time, the cassette 21 or the serration 121 is two. One or the other of the elastic walls 31 is deformed in the direction of the reserved groove 3 by pressing the elastic wall 31, so that the cassette 21 can smoothly pass through the serrations 121.

Since the first embodiment of the safety needle of the present invention is operated, the medical staff only needs to rotate the sleeve 2 or the syringe 1 after the injection or the liquid is taken, and then push the sleeve 2 toward the front end of the syringe 1. And when the cassette 21 is pushed back to the end of the third-section guide rail 124 (close to the front end of the syringe 1), it stops, so that it is quite easy to operate, and the conventional pull-back safety needle structure can be avoided because of the medical staff's application. Force In the case of the needle sticking event, the safety needle of the present invention has a simple structure, so that the production cost can be effectively reduced.

FIG. 6 is a perspective exploded view of the second embodiment of the safety needle according to the present invention. In the embodiment, the front end of the third rail 124 is adjacent to the side edge of the front end of the syringe 1 and has a receiving area 125. The accommodating area 125 is connected with the third section rail 124 at least one saw tooth 121, and the stagnation surface 1213 of the swarf 121 is located farther away from the third section rail 124, when the safety needle of the present invention is second Before the embodiment is used, the medical staff penetrates the sleeve 2 from the end of the syringe 1 to cover the outer edge of the syringe 1, and the cassette 21 is located at the front end of the first section rail 122, and then the sleeve 2 is Pulling toward the rear end of the syringe 1 causes the cassette 21 to pass through the weir introduction surface 211 and the introduction surface 1212 of the serration 121, and the sleeve 2 is moved toward the rear end of the barrel 1 to expose the injection needle 4 from the front end of the sleeve 2. For the medical personnel to perform the action of injecting or taking the liquid, and after the injection or the liquid is completed, the carousel 21 is passed through the second segment guide 123 into the third segment guide 124 through the rotating sleeve 2 or the syringe 1. Pushing the sleeve 2 toward the front end of the barrel 1, and when the cassette 21 is moved to the end of the third section rail 124, the medical staff again sees through Rotating the sleeve 2 or the syringe 1 so that the weir introduction surface 211 of the cassette 21 acts on the introduction surface 1212 of the serration 121 at the junction of the accommodating area 125 and the third section rail 124, so that the cassette 21 enters the capacity In the setting area 125, at this time, the retention surface 1213 of the connection portion 121 of the accommodating area 125 and the third-section guide rail 124 abuts against the stagnation surface 212 of the cassette 21, so that the cassette 21 cannot be used. The accommodating area 125 is retracted to the third-section guide rail 124, so that the sleeve 2 can no longer be pushed back toward the rear end of the syringe 1 to prevent the sharp end of the injection needle 4 from being exposed, thereby preventing the occurrence of the needle-pinning condition.

Referring to FIGS. 8-10, in the first embodiment and the second embodiment of the safety needle of the present invention, the cassette on the sleeve and the guide rail of the barrel are mutually replaceable, for example, the present invention. The third embodiment is the structure in which the cassette on the sleeve and the guide rail of the barrel are mutually replaced, and the fourth embodiment is the cassette of the sleeve and the barrel of the second embodiment. The structure after the rails are replaced with each other.

In the third embodiment, the latch 21 is disposed at the front edge of the barrel 1, and the guide rail 12 is extended from the rear of the sleeve 2 to a first section of the guide rail 122, and is adjacent to the front end of the sleeve 2. After the side edge of the sleeve 2 extends a fixed distance from the second section rail 123, a third section of the rail 124 extends from the front end of the sleeve 2 to the rear end of the sleeve 2 to a position close to the rear end of the sleeve 2, so the third implementation In the case of use, the medical staff will make the cassette 21 correspond to the rear end of the first section of the guide rail 122, and then insert the sleeve 2 from the front end of the barrel 1 into the outer edge of the barrel 1, so that the cassette 21 passes through the crucible introduction surface 211 and The introduction surface 1212 of the serration 121 acts to drive the sleeve 2 to move toward the rear end of the syringe 1 to expose the injection needle 4 from the front end of the sleeve 2 for the medical personnel to perform an injection or liquid take-up action, and to inject or take a liquid. After completion, the medical staff rotates the sleeve 2 or the syringe 1 to cause the cassette 21 to enter the third section of the guide rail 124 through the second section of the guide rail 123, and then pushes the sleeve 2 toward the front end of the syringe 1 to make the cassette 21, the third segment guide 124 approaches the end of the syringe 1 to drive the sleeve 2 to move toward the front end of the syringe 1, and the sleeve 2 is re-covered by the injection needle 4. At the same time, the retaining surface 1213 of the sawtooth 121 of the third-stage guide rail 124 abuts against the quasi-retaining surface 212 of the cassette 21, so that the sleeve 2 can no longer be pushed toward the rear end of the syringe 1 to avoid the injection needle 4. For the purpose of external leakage, in addition, when the cassette 21 is passed through the serration 121 provided on the guide rail 12 to cause the crucible introduction surface 211 to act on the introduction surface 1212 of the serration 121, the cassette 21 and the serration 121 are pressed against each other. And the cassette 21 and the serration 121 are moved in opposite directions. At this time, either or both of the cassette 21 or the serration 121 pass through the pressing elastic wall 31, so that the elastic wall 31 is deformed toward the reserved groove 3. The cassette 21 can be smoothly passed through the serrations 121.

Before the fourth embodiment is used, the medical staff penetrates the sleeve 2 from the end of the syringe 1 to cover the outer edge of the barrel 1, and the cassette 21 is located at the rear end of the first section rail 122, and then The sleeve 2 is pushed toward the rear end of the barrel 1, and the cassette 21 is moved through the crucible introduction surface 211 and the introduction surface 1212 of the serration 121, and the sleeve 2 is moved toward the rear end of the barrel 1 to make the injection needle 4 be sleeved. 2 The front end is exposed, and after the injection or liquid extraction is completed, the rotating sleeve 2 or the syringe 1 is rotated, so that the cassette 21 passes through the second section guide 123 to enter the third section. The rail 124 pushes the sleeve 2 toward the front end of the barrel 1. When the cassette 21 moves to the end of the third section rail 124, the medical staff again passes the sleeve 2 or the barrel 1 to make the cassette 21 The introduction surface 211 acts on the introduction surface 1212 of the sawtooth 121 at the junction of the accommodating area 125 and the third section rail 124, so that the cassette 21 enters the accommodating area 125.

In addition, referring to FIG. 11 to FIG. 13 , a fifth embodiment of the present invention, in the embodiment, the saw teeth 121 of the upper rail 21 of the syringe 1 can also be disposed on the first guide rail 122 of the guide rail and the third guide rail. 124 is adjacent to the bottom surface of the front end of the barrel 1, and the cassette 21 is disposed on the inner wall surface of the sleeve 2 near or near the end, and interacts with the serration 121 to serve as the guiding sleeve 2 to displace and make the sleeve 2 can no longer push back to the rear end of the syringe 1, and the sleeve 2 defines a reserved slot 3 on each side of the cassette 21 to allow the cassette 21 to interact with the serration 121 of the syringe. The arrangement of the retaining groove 31 allows the cassette 21 to be arched upward and deformed, so that the cassette 21 can smoothly pass through the serration 121. In addition, the embodiment can also be used as the third embodiment and the fourth embodiment. The upper cassette 21 and the guide rail 12 of the cylinder 1 are replaced with each other.

Please refer to FIG. 14 , which is a sixth embodiment of the safety needle of the present invention. The embodiment is similar to the structure of the third embodiment, and the difference is that the needle holder 11 is disposed on the side edge of the front end of the syringe 1 , so The front end of the needle sleeve 2 is provided with an arcuate hole 22 through which the injection needle 4 can pass. Through the arrangement of the arcuate hole 22, the injection needle 4 is rotated in the sleeve 2 or the syringe 1, so that the cassette 21 passes through the When the two-section guide rail 123 enters the third-section guide rail 124, the injection needle 4 can be displaced along the curved hole 22. In addition, when the guide rail 12 is disposed on the sleeve of the safety needle of the present invention, the strength of the sleeve 2 is easily caused. Insufficient, the present invention can also provide a reinforcing rib 23 at the outer edge of the end of the sleeve 2 for complementing the strength of the sleeve 2.

It can be seen from the above that the present invention can be disposed on the cylinder and the sleeve by correspondingly connecting the cassette and the guide rail, and the cassette is disposed on the bottom surface or both sides of the guide rail, and thus is covered by the technical features of the present invention. Within the scope of the scope, the transformation of the relative position and the modification of the front-rear direction shall be included in the patent scope of the present case.

The detailed description of the present invention is intended to be illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention. In the scope, and the case is not only innovative in terms of technical thinking, but also has many functions that are incompatible with the traditional structure of the past, it has fully complied with the statutory patent requirements of novelty and progressiveness, and applied for it according to law, and urges you to approve the invention. Patent application, in order to invent, to the sense of virtue.

1‧‧‧Syringe

11‧‧‧ needle seat

12‧‧‧ rails

121‧‧‧Sawtooth

1212‧‧‧Import

1213‧‧‧ stranded surface

122‧‧‧First section rail

123‧‧‧Second section rail

124‧‧‧third section rail

2‧‧‧ casing

3‧‧‧ reserved slot

4‧‧‧Injection needle

Claims (12)

The utility model relates to a safety needle, which is mainly provided with a sleeve on the outer edge of a cylinder, which comprises: at least one guide rail, the rail is sleeved on the outer edge of the cylinder, and the guide rail comprises a first section rail and a second section. a guide rail and a third-stage guide rail extending from a front end of the barrel toward a rear end of the barrel to a position close to a rear end of the barrel, and extending to the side edge of the barrel by the second-stage guide rail The distance extends to the front end of the barrel to a position close to the front end of the barrel, and the first section rail, the second section rail and the third section rail have a plurality of serrations on one side, two sides or a bottom surface thereof Each of the serrations has an introduction surface and a retention surface; and at least one cassette, the cassette is disposed on the end wall surface of the end of the sleeve or near the end, and the cassette is placed on the guide rail The cassette has at least one introduction surface and at least one retention surface that interact with the serrations. The safety needle according to claim 1, wherein an angle between the retention surface and the guide rail is perpendicular or less than 90 degrees, and the retention surface is located farther from the front end of the guide rail. The safety needle according to claim 1, wherein the position of the third-stage guide rail adjacent to the front end of the syringe extends to the side edge with an accommodating area. The safety needle according to claim 3, wherein the third section rail and the accommodating area are provided with at least one serration, the side of the serration has a lead-in surface and a stagnation surface, and the stagnation surface is located Farther away from the direction of the rail. The safety needle according to claim 1, wherein the syringe is provided with at least one reserved groove on one side or both sides of the position where the saw teeth are provided on the guide rail, so that the reserved groove and the guide rail form an elasticity. Elastic wall. A safety needle is mainly provided with a sleeve on the outer edge of a syringe, which comprises: At least one rail, the rail is sleeved on the outer edge of the sleeve, the rail includes a first section rail, a second section rail and a third section rail, the first section of the rail is from the end of the sleeve After the front end of the sleeve extends to a position close to the front end of the sleeve, the second section rail extends a fixed distance to the side edge of the sleeve, and then extends to the end of the sleeve to the end of the sleeve with the third section rail. One side, two sides or a bottom surface of the first segment rail, the second segment rail and the third segment rail have a plurality of serrations, each of the serrations having an introduction surface and a retention surface; and at least one cassette, The cassette is disposed on the outer edge of the front end of the barrel, and the cassette is received in the guide rail. The cassette has at least one introduction surface and at least one retention surface that interact with the serrations. The safety needle according to claim 6, wherein the angle between the retention surface and the guide rail is perpendicular or less than 90 degrees, and the retention surface is located farther from the front end of the guide rail. The safety needle according to claim 6, wherein the position of the third-stage guide rail near the end of the sleeve extends to the side edge to have an accommodating area. The safety needle according to claim 9, wherein the third section rail and the accommodating area are provided with at least one serration, the side of the serration has a lead-in surface and a stagnation surface, and the stagnation surface is located Farther away from the direction of the rail. The safety needle according to claim 6, wherein the sleeve is provided with at least one reserved groove on one side or both sides of the position of the serration provided on the guide rail, so that the reserved groove and the guide rail form an elasticity. Elastic wall. The safety needle of claim 6, wherein the sleeve end outer edge ring is provided with a reinforcing rib. The safety needle according to claim 6, wherein the side edge of the front end of the needle has a needle holder for inserting the injection needle, and the front end of the needle sleeve is provided with an arcuate hole through which the injection needle can pass.