TW592742B - Safety syringe for subcutaneous injection - Google Patents

Abstract

A safety syringe for subcutaneous injection comprises a sleeve with a L-shaped guiding slot; a hollow barrel with a projection on the outer surface and having a front nose; a needle unit fit at the front of the barrel; and a plunger snugly fitted within and slide through the barrel. After use, pull the plunger to cause the barrel to slide rearward until the needle is received in the sleeve again, thereby preventing a medical worker from being contaminated by microorganisms or blood on needle by accidentally pricking.

Description

592742 V. Description of the invention (1) The present invention relates to a "multifunctional safety needle cover step, less and no need to change the original injection cylinder and needle Ί--position == head safety setting ★, and its The operating position is behind the needle. During use, the nursing staff can < or may be infected by the virus, and can ensure its safety in use; Safety injection syringe structure 'as disclosed in U.S. Patent No. 093 1 70, including a barrel (i.e. a barrel), a plunger plug (P = e:) 20, and a sleeve (30), in which 〇 和 柱 'and the main feature of the patent is that a tab 13 is protruded at the other end of the conventional f-shot 10, and a shape guide groove ~ 33 is provided above the sleeve 30, and the guide groove is used. The stopper convex part η at the bottom of the groove 33 is, in actual use, the safety of the sleeve 30 is at stake. The reason is that the sleeve 30 is made of plastic material, and the stopper 35 It has the elasticity of the plastic two material, so that the blocking portion 35 can not be completely locked to the convex portion 13, but the convex portion 13 can be removed and used again. Make it safer. Furthermore, in order to match the sleeve 10 with the cannula 30, the convex portion 13 can smoothly slide in the guide groove 33, and its size is subject to the convex portion 13 The setting effect needs to be moderately changed, making the injection syringe unable to follow the international standard specifications of the original structure that has been used for a long time. This does not cost molds, and is compatible with the same type of products in the industry. In other injection cylinders of the same type, in particular, page 5 323.021TWP.ptd 592742 V. Description of the invention (2) ___ After changing the original structure, make the injection to pull 彳 Λ " κ, Wang shot syringe 1 〇 washroom The watertight structure of the cylinders 0 Λ and their injection solutions and the smoothness of operation between them and the soil 20 need to be improved urgently to overcome the technical problems. Difficulties in use safety occur. SUMMARY OF THE INVENTION The purpose is to provide overnight settings, so that used needles that have been contaminated], 2 can safely set the needle and lock it in the locking groove of the safety needle cover, s effectively retract the needle into the needle and remove it again to ensure its use. Safety = once indented The next purpose of the Ming Dynasty is to provide a one-in-one arrangement, in which the cannula unit f forces the joint bridge between the female full needle set injection cylinder ^ ^ Zao Wu as the needle unit and the injection cylinder do not have to be tight to make various Traditionally provided in different kinds of wire transfer, ± U # facilitates the compatibility and applicability of the casing unit directly. 9 body, so that the present invention can be widely installed, = provided- The outer periphery of a multifunctional safety needle set element, the longitudinal cylinder is fixed to the longitudinal cylinder base of the firing cylinder, and the sleeve unit is set up: and the slave is available for easy operation. ; ΐ ::: and get a good guide '· By this, to achieve the purpose and effect of technology, one of the body base units adopted by the device, the body base is early, and one set is fixed to the longitudinal tube. Shibei Zaofan and a set on the outer periphery of the elongated cylinder base unit 323-021TWP.ptd page 6 592742 V. Casing sheet i of the invention description (3), in which ^ this elongated cylinder base sheet The rear end of the pipe body has a larger diameter pipe body ^ The front end has a smaller diameter pipe body, and a flange larger diameter pipe is provided at each corresponding position. At the rear end, the front end of the injection cylinder is directly named, and the two flanges can be screwed or inserted into the% convex portion; a larger diameter through the front end of the tube body is provided with a β-hai needle unit, which is tightly fixed. On the smaller-diameter pipe body, the front end of the longitudinally long base body unit is white. The casing unit is a central office. The chute includes-a straight section and a section; the section :: "" -Long chute with two stops, a trace of sincerity, ^, ,, and the straight section includes a rib such as a section, -locking square slot Γ :::, including-square positioning recess ^ is-thin strip components and safety The body material of the needle sleeve unit is connected to the middle and front and out of the tube limit. The grooved slippery sleeve is shaped like an over-shaped single-contracted long head and the needle is single-concave. Unit to the buckle head seat single-acting end pin fixed base tube moves forward to convex the body cover part of the body tube to the convex single, convex to the seat, when it should be used as the base when the sleeve is correct The body can be concave; the ca n’t guide the shooting position cover element to guide the doomed cover sheet on the tube of the preparation part to fix the complete set of Yuanliang solid end to turn the order to, the front end to the seat, after the time Accept This basic part is borrowed from the body, and the order is inward.

, Built-in 323-021TWP.ptd Page 7 592742 5. Inventor (4). In order to further understand the features, technical means, and specific functions and objectives achieved by the present invention, more specific embodiments of the present invention are enumerated, followed by detailed description with drawings and numbers. Embodiment: The first preferred embodiment of the multifunctional safety needle cover device of the present invention, as shown in Figs. 1 to 3, can be implemented on the injection cylinder 10 of a subcutaneous injection or the / main shooting guide joint of a drip bottle. The device includes at least a long cylindrical base unit 30 which is connected to the connecting portion of the needle unit 40 and the injection cylinder 10 with a simple and tight sleeve, and a set of a long cylindrical base unit 30 and a set placed on the cylindrical base unit. The outer casing unit 20, wherein the cylinder base unit 30 has a smaller diameter pipe body 33 at the front end, and a larger diameter pipe body 35 at the rear end of the pipe body. A flange 351 is provided at a position corresponding to the diameter of the rear end. The two flanges 35i-351 can be screwed to the front end of the injection catheter connector of the injection cylinder or the drip bottle or the larger diameter of the tube 35. The inner hole is directly inserted into the connection portion ji of the injection cylinder body, and a convex portion 34 is provided at the outer peripheral portion of the front end of the larger diameter tube body 35; the convex portion 34 can be made to interact with the locking groove 225 described below Any feasible shape of the lock, in a preferred embodiment of the present invention, as shown in FIG. 1A, the projection W 3 4 'Front and back low' and right low left high, the shape of the cross section is shown o 'so that the locking projection 34 is easy to fit in the casing unit 20, and it is easy to lock on the following lock After the stop groove 225 is inside, it is not easy to be removed again. In detail, the convex portion 34 includes a first D-shaped surface 341, a second trapezoidal surface 342, and a third D-shaped surface 592742. 5. Description of the Invention (5) 343, a fourth trapezoidal surface 342, a top surface 345, and a bottom surface 346. The convex portion 34 is characterized in that, except that the bottom surface 34 and the top surface 345 are square, the area of the first surface 341 is larger than the second surface, and the second surface is larger than the third surface, and the third surface is larger than the fourth surface. Surface 345 is an arc-shaped inclined surface, that is, it is inclined from the upper second surface 3 4 2 to the lower fourth surface 3 4 4. At the same time, an arc is also formed from the first surface toward the third surface. The shape is inclined so that the locking convex portion 34 can be smoothly inserted into the locking square groove 225 (details will be described later). The casing unit 20 is a hollow tube body 21 having a sliding groove 220, and the dusting cover 22 is shielded above the sliding groove 220 to meet sanitation. An opening 2 is provided at the end of the body 21 1 B, which can be used to expand and retract the needle 41 of the needle unit 40. The length of the slide groove 220 is smaller than the length of the tube body 21. In a preferred embodiment of the present invention, as shown in FIG. The groove system is a τ-shaped chute 220, including a straight portion 221 and a transverse portion 222, wherein the straight portion includes a front stop portion 2 21 F and a rear turning portion 2 2 1 R. The transverse portion 222 includes a square positioning recess 224 at the first (left) end, a lock square groove 225 at the second (right) end, and a stopper portion 0 provided at the entrance end of the lock square groove 225. Thus, the sleeve is fixed to the injection The cylinder base unit 30 in front of the cylinder 10 can be sleeved, and the convex portion 34 can be guided and moved in the chute 220: Needle 41 ▼ Telescopically retractable in the sleeve unit 20; A 4-body base unit 30 is provided When the & section 34 of the new product is ready to use the positioning recess 224 (shown in Figure 4) of the 胄 system 221, the needle can be singled, and the direction J can be hidden inside before being used for protection. Protection, so that the needle 41 is completely covered and protected ’It constitutes an independent needle safety;

592742

The connecting part 11 of the injection cylinder ι0 is fixed by the rear end 35 of the ling body base unit 30, as shown in Fig. 2-3. 〇〇 Kiss Refer to Figure 2-8, when you want to perform injection, you can first move the base = the intricate convex portion 34 from the positioning concave portion 224 (as shown in Figure 5 and γ),

^ The lateral section 222 and the turning portion 221R move forward in the chute 220. At this time, the needle 41 of the needle unit 40 can be opened from the front end opening 1BJ of the sleeve unit 20 until the convex portion 34 moves to the front end. At the point of 221F, the needle 41 has already struck the king's road and formed a retractable needle safety device, as shown in 21-3. Because the operation position of holding the sleeve unit 2 by the hand is always in the position After 41, there is no need to pass through the needle tip 4 1 a of the needle 41; therefore, there is no danger of a puncture or virus infection during use, and it is very safe, and when the injection is completed, the cannula unit 20 only needs to be operated in the reverse direction When the convex part 3 front end stop 221F of the chute 220, the rear end turning part 22ir, and the positioning recess 224 that moves laterally to the rear end, the needle unit 40 will be > ^ 7 1 ^ set & single 20 Within ”means that before the hypodermic needle is not used, the 5th 锁 2 ° 卩 ^ 4 will enter the locking square groove 225 from the recessed position 224, and at this time, the convex part 3 4 will pass the limit part 2 2 7 while entering the lock

Lock: The convex portion 34 is blocked once it enters the locking square groove 225. As shown in FIG. 8, the left side of the top surface of the convex portion 34 is much higher than the bottom edge of the restricting portion 227, so it is convex. After one page ^ slot 225, the limit stop Qiu 227々π t — back eight lock square ”Qixi ice Γ block, the convex portion 34 will never slide out of the limit name. The mouth is' ensure the needle unit 4〇 Needle tip 41a is always hidden in $

592742 Five 'Explanation (7) & ^ Ϊ 2 〇, there is no risk of stabbing. Because in this process, the operation position of the hand holding the cannula as early as tg20 is always behind the needle 41, no need to go through, the needle of the needle 41 is 41a larger; therefore, there is no danger of a puncture or virus infection. , And very safe; this structural feature is really the most important feature of the present invention. It should be explained here that, in one of the preferred embodiments of the present invention, in order to ensure that the female complete set 20 is absolutely safe in use, the used contaminated needle 41 is allowed when the needle holder 40 is retracted inward. Once the card is locked, it is prevented from being used again. The left section of the transverse section 221 of the τ-shaped slide groove 22 0 is formed with a positioning recess 22 4 that closely cooperates with the convex section 34. The right section is made with a J-dead section. After the stop of 227, enter the tightly locking square groove m. Since the dad unit 20 is injection molded, the design and material selection are deliberately designed to make the stopper 227 have good elasticity and toughness. In order to make the convex portion 34 buckle into the locking square groove m from below the restricting portion 227, the restricting portion 2-27 still retains its original strength. 'It can be seen from the figure that the restricting portion is milked as a thin π piece and the safety sleeve unit 20 The body material is integrated into one. In order to make it easier to operate, as shown in the figure, the top of the convex portion 3> 4 is made into an arc-shaped inclined top surface from left to right as described above, that is, from the second surface 342 to the upper surface. The lower fourth surface 344 is inclined with an arc, and at the same time, the ϋΓΓ surface 341 is also inclined with an arc toward the third surface 343. In order to facilitate the operation, the convex portion% easily passes the restricting portion 227 and enters the locking square groove. Once the convex portion 34 enters the locking square groove 225, it is stopped at the position 25, as shown in Figs. 6 and 8, because the left side of the top surface of the convex portion 34 is much higher than the bottom edge of the restricting portion 227. Therefore, the convex part can be entered on page 11.323.021TWP.Ptd 592742 V. Description of the invention (8) After the square groove 225 is stopped, the stopper 227 is restricted, and the convex part 34 can hardly slide out of the stopper 227 again. In this way, once the needle 41 of the needle seat unit 40 is retracted into the needle sleeve unit 20 and the convex portion 34 is locked into the locking square groove 225, not only will it not hurt the medical staff or other personnel who contact the needle tube, and it has been used. The needles cannot be used again. This section completely eradicates the possibility of re-cleaning and using the used needles of low-developed countries. This is the main idea of this invention. . Another feature of the idea of the present invention is that an anti-slip convex ring 23 is additionally provided on the middle periphery of the sleeve unit 20 of the above embodiment to facilitate user's finger grip, and the inner wall of the rear end of the sleeve unit 20 is as the fourth one. As shown in the figure, a horn, a large hole 228 and a shoulder 229 are formed. Due to the height of the convex portion 34 plus the outer diameter of the cylindrical base single TC30, μ is smaller than the maximum inner diameter D3 of the horn enlarged hole 228. And the minimum inner diameter D2 larger than the horn enlarged hole 228, this definition, coupled with the good elasticity and toughness of the plastic material of the sleeve unit 20, is not only conducive to the combination of the injection cylinder 50 and the sleeve unit 20 The locking convex portion 34 of the cylindrical body base unit 30 is easy to insert into the sleeve unit 20, and the mold structure is more suitable; otherwise, the height of the locking convex portion 34 is higher than the outer diameter of the body base early element 30. The total dimension D1 is much larger than the size of the casing unit 20 = inner diameter, and the cylinder base unit 30 cannot be locked into the protrusion ^, and the casing unit 20 must be formed at the rear end of the casing unit 20 A crack% '俟 the cylinder base unit 30 locking projection 34 is sleeved into the casing unit 20 die In preheating engagement gap is closed, the sleeve unit 2. The result: The mold structure and assembly are quite complicated, which is another aspect of the present invention.

592742 V. Description of the invention (9) Please refer to Figs. 9-10. For illustration, in the second embodiment of the present invention, the second and third embodiments of the present invention are implemented in an elongated hypodermic injection cylinder. The safety needle cover device 30 of the present invention is extended by the rear end 35 of the longitudinal cylinder 30, and the longitudinal cylinder base unit 11A is fixed, as shown in FIG. 9; In the connection example of the body 10A, the safety needle cover device of the present invention is based on the third embodiment 10B of the present invention, and the longitudinal S cylinder base | element is applied to the large-diameter subcutaneous injection cylinder and The connection of the large-diameter tube injection cylinder 10B is shown by the rear end 35 of the elongated cylinder 30, and can be fixed as described in the first embodiment of the present invention, as shown in the figure; and this structure: large Figures 4 and 8 of ::: are the same as those shown in Figures 4 to 8. The relevant explanations are omitted. The above description of the first embodiment of the present invention = see the figure η 'in the present invention can be implemented in the drip catheter connector 70, the second example τ can also be through the rear end flange 351 of the barrel base 35 ^ The long / body base unit 30 is internally threaded on the portion 71, and is inserted by a convex coffee cup with a strength of 22: 2; and can be as shown in Figures 2-3 and 4-8 of the first embodiment of the present invention. This method is the same as the first embodiment of the present invention, and the related descriptions are: It is generally the same as the above, and it is intended to emphasize the explanation here. It is the main invention of the invention through the casing unit and the longitudinal cylinder base. Seat sheet: 2 :: 4 needle safety device, that is, the needle safety I unit uses the cylinder base unit as the needle unit and the syringe ^: the bridge's simplified "h set m, and the operating position is always located at Behind the needle to avoid accidental puncture during use and ensure its safety; therefore,

323-021TWP.ptd Page 13 592742

There is no need to change I 彳 仞 仞 旯 旯 仃 仃 仃 仃 仃 original various traditional injection cylinders and = tubes :: ΐ 接 ::: a variety of different traditional subcutaneous extremely easy to surname :: has a wide range of compatibility and appropriate sound So 3® ΪΪ ,,, ° structural features and the unique spatial form W is unique. To the convex part, the guide groove, and the convex part of the guide groove (or the square buckle concave part) (方形) is a special case of the above-mentioned comparative example of the present invention, and is not limited to this, there are two others: ίτ 用 / 例 ⑹ 'The convex portion 34 may be changed into a square body or multiple β " or 1-shaped guide grooves, and it is also feasible to combine the rear end turning portion 2 2 1 R 224 into one. The original injection cylinder of the needle structure or the point of use, and the operation is actually an innovative method of the present invention (ie, the best embodiment of the locking method is to use a number of equivalent means angle body, T guide grooves and positioning recesses. In summary, the needle structure of the hair Under the principle, the second section of the injection cylinder, the patent filed according to law highlights that the patent law rewards people to clear the original injection cylinder without changing any of the original cylinders, and that it can be directly fixed to different manifestations. For applications that meet the application requirements of the invention patent, please grant the patent of this case at an early date, and in the spirit of the legislation of the invention, we are looking forward to it. The main part of the sheep represents 10 injection cylinder 10B shuttle tube subcutaneous betting 11, 11A ~ B connecting part 21 Tube body 22 Dust cover 220 Chute, straight section 1 0 A slender hypodermic injection cylinder body 2 1 B opening 20 casing unit 221 transverse section

323-021TW.ptd

592742 V. Description of the invention (11) 221R rear end turning part 2 2 1 F front stop part 2 2 4 square positioning recess 2 2 5 lock groove 2 2 7 limit part 2 2 8 pull < enlarged hole 2 2 9 shoulder Section 2 3 Anti-slip convex ring 30 Cylinder base unit 33 Small diameter pipe body 34 Convex portion 341 First D-shaped surface 3 4 2 Second trapezoidal surface 343 Third D-shaped surface 344 Fourth trapezoidal surface 345 Top surface 346 Underside 3 5 Large diameter tube body 3 5 1 Flange 4 0 Needle unit 41 Needle 4 1 a Needle tip 42 Needle seat 71 Fixed end 70 Catheter connector

323-021TWP.ptd Page 15 592742

Three-dimensional decomposition of the preferred embodiment. The first figure of the convex part of the preferred embodiment is the present invention-Figure 1A is the figure of the invention; Figure 2 is the invention-Chejiao Figure 2A is the second figure Figure 3 of the Bureau is a comparison of the present invention. Figures 4 to 6 are explanatory diagrams of the first state of the present invention. An enlarged sectional view of an unused state portion of the preferred embodiment. First of a preferred embodiment of the use state of the embodiment. The schematic diagram is an enlarged cross-sectional view of the schematic diagram; the top view, to the third action state, the seventh diagram is from the fifth diagram 7 to 7 "ν The eighth diagram is from the θ diagram 8 to 8 @ section action diagram; the ninth diagram is This is the second line two section action diagram of the present invention; FIG. 10 is a three-dimensional embodiment of the flute _ best embodiment of the present invention. FIG. 11 is the fourth preferred embodiment of the second preferred embodiment of the flute of the present invention. Establish an intention; indicate a circle;

Claims (1)

592742 _ VI. Scope of patent application 1 · A "multifunctional safety needle cover device, the injection cylinder of an injection needle, the safety device package 22 series is suitable for various subcutaneous elements, a set fixed to the longitudinal cylinder base Longitudinal cylinder base Single needle unit of the sleeve unit on the outer periphery of the cannula unit and a set of the long cylindrical base unit are pure, the rear end of the tube has a large Diameter pipe body; I. It has a smaller diameter pipe body, each of which is provided at a corresponding position: a flange, the diameter of the pipe body at the rear end of the diameter of the front end of the injection cylinder, and the comparison; Fixed on the convex part; < the body peripheral part is provided with a 50-H needle unit tightly fixed on the smaller diameter tube body; the sleeve unit at the front of the μ longitudinally long body base unit is a middle An empty pipe body, the chute includes-a straight part and a horizontal south ⑽ ^ has a long chute on the periphery, the limit is two locks ... the horizontal part includes-square ... the stop is a one-degree and the lock Limiting part of the entrance end of the square groove, body; ',' ,,,, ·· tian u 70 pieces and the body material of the safety needle cover unit The cylindrical element can be sleeved on the outer periphery of the base unit of the cylinder and moved, and the convex part of the early element can just stop at the middle end of the long chute of the casing unit. When the convex part moves to the front cover of the long chute, it is: 2 o'clock, the needle unit fixed at the front end of the cylinder base unit is extended 2: 2 2 ends for injection use; when the convex part is buckled Stop at the positioning recess of the one and two f-end turning portions of the long chute, so that the needle unit is retracted into the sleeve early and completely covered; when the protruding portion passes the limit by the positioning recess 323-021TWP.ptd 592742 Scope of patent application -------- When the stopper is locked in the lock square groove, the convex part is locked, so that the sleeve unit can no longer be moved, so that the needle is single dead ^ Lock the square groove But it does not stop, so it constitutes an independent one = suffocated in the casing unit. Safety device of the shooting needle 2 · As "Position" in the first scope of the patent application, the convex part and the chute It can be used as a pair of king pin sets, so that the casing unit is placed on the base of the longitudinal cylinder. When making reciprocating movements, moreover, such as "$ ^ position" in item 丨 of the scope of patent application, where the convex portion is a _D-shaped convex portion, the needle sleeve has a circular arc portion and the other side is a straight portion. By. The person / 卩 σ 卩 includes one side as in the “Setting” of item 丨 of the patent application scope. Among them, the latching convex portion is shaped as a full needle covering surface so that the convex portion can be easily covered. ^ D After being locked in the above locking groove, it is not easy to be moved out of the ^, and it is easy to be removed. 5 · For example, "Xi-^" in the scope of patent application, among which, visit the long_base single / pin set : Fixed on various hypodermic syringes or 6 · If the scope of the patent application is set "", where the long slippery functional safety needle set 7. If the patent application for the second paragraph is item 1 of the long 3 slide slot. ", Where the long-slip, evening functional safety needle cover farmer 8. If the scope of the patent application is the longest, the long-slip chute. Beizhi Multi-function Safety Needle Set 323-021TWP.ptd Page 18 6. The scope of the patent application is set to n ', where the cylinder base unit > face, a second trapezoidal face, a third D = face and A bottom surface, wherein the area of the first surface of the convex portion 34 is larger than that of the second surface, which in turn is larger than that of the fourth surface, and the top surface is arc-shaped, and is inclined toward the lower fourth surface. An arc-shaped incline is provided so as to lock the person who is caught in the locking square slot. 9 · As for the item 1 in the scope of patent application ", in which the hollow tube body is reinstated. 10 · According to item 1 of the scope of the patent application, in which the inner part of the rear end of the casing unit is formed, and the top of the convex part is formed as a self-face to facilitate the convex part of the cylinder base unit. η As for the item No. 1 in the scope of patent application ", among which there are many left sides of the top surface of the convex part, so once the convex part enters the locking square groove, it is difficult to slide out of the restricted part. The convex portion further includes a first shaped surface, a fourth trapezoidal surface, a bottom surface and a top surface which are square, the second surface is larger than the third surface, and the second inclined surface is formed by the second higher surface, and then The first side faces the convex part, and the multifunctional safety needle set can be smoothly moved by the stopper. A slip ring is provided on the outer periphery. The wall of the disposable safety needle set forms a horn enlarged hole and a low-south arc-shaped inclined top. Inserted into the cannula unit, "the disposable safety needle set is higher than the bottom edge of the stopper, and the protrusion is restricted by the stopper.