TW200410738A - 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

200410738 V. Description of the invention (l) The title of the month of the month of the month, the invention relates to a "more than eight kinds of benefits need to be changed to the ancient king, ten sets of devices", especially a variety of hypodermic needles of various injection cylinders. ^ Used for those who are located behind the needles, which are bound and whose operation positions are so dangerous to the virus, that they can ensure their safety in use. Previously: 60 93 sister-like. The traditional safety injection syringe structure, as disclosed in US Patent No. 3170, includes a syringe (barrel) 10, plunger ^ Plunger) 20 ^-, ^ t,; Two sigma syringes, and the main feature of this patent is that a tab 13 is protruded at the front end of the conventional Dan 10, and a shaped guide groove 33 is provided on the sleeve 30. The guide groove 33 is used. The supporting portion 35 at the bottom of the groove is the convex portion 13, so that 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 stop The portion 35 has the elasticity of the plastic material itself, so that the blocking portion 35 is not completely lockable to the convex portion 3, and the convex portion 13 can be removed and used again, so that its safety is lost. In addition, in order to match the cannula 10 with the cannula 30, the injection cylinder 10 with the convex portion 13 can smoothly slide the convex portion 13 in the guide groove 33, and its size gauge is affected by the setting of the convex portion 13. Need to make a modest change, so that the injection syringe does not use the international standard specifications of the long-used original structure, which not only consumes 'high' mold cost, but also has compatibility and interoperability with similar products of the same industry. Limitation, that is, it cannot be implemented in other injection cylinders of the same type, in particular, 323.021TW.ptd Page 5 200410738 V. Description of the invention (2) — After changing the original structure, make the injection syringe 10 The water-tight structure of the injection solution and its use need to be improved to overcome the technical problems. v Wen Wangzhu's problems are difficult to find. Summary: The main purpose of the present invention is to provide an overnight set to allow the use of contaminated needles; 1. Rf is a safety needle set and locked in the safety needle cover. The needle is retracted and used again to ensure = full :: head-density is not available after retraction. A second object of the present invention is to provide a set, wherein the cannula unit is installed between the injection cylinder and the cylinder base. The simple tight sleeve of the joint bridge with the injection cylinder does not need to be changed in any way. . Traditions are set on different traditional injection cylinders; those with direct compatibility and applicability. This makes the present invention have a wide range, and provides a multifunctional safety needle set with fixed unit and r: end; : The stage section can be used for people outside the base unit of the needle body, and the sleeves can be easily guided by the long tube to be easy to operate. ^ By this, the technical f effect is achieved. Needle list of the adopted body base unit _: Early seat, one set fixed on the longitudinal tube Shishuo 70 and one set on the outer periphery of the longitudinal tube base unit

323-021TWP.ptd 1ΔΔ Page 6 200410738 V. The casing unit of the description of the invention (3), wherein the longitudinal cylinder base unit is a pipe body with a larger diameter at the rear end of the pipe body. : Diameter ί body = one flange is provided at the corresponding position, the diameter of the two rear cymbals is the front end of the injection cylinder, and the larger or inserted in the convex part; the needle is provided on the outer periphery of the body The unit is tightly sleeved on the longitudinal smaller diameter pipe body; the casing unit at the front end of the early element of the body base is a hollow pipe body, and its outer periphery is a chute including a straight portion and a transverse portion, where ^ 长π groove, the stop portion, the rear end turning portion, and the transverse portion includes two two =-front end portion,-lock square groove and a limit provided at the entrance end of the lock square groove :: standing concave stop system It is a thin strip element and safety needle sleeve ^. Alas, the limiting body; the body material of the flat 70 is connected to—by this, the sleeve unit can be sleeved on the barrel base unit, and the convex portion on the barrel base unit can be just around the sleeve, And move 'and get good guidance, f the middle part of the J-shaped chute of the convex part, and the right part of the tube's base, the front end of the sleeve before the injection unit for the injection; When the convex part: 70 protruding from the rear end turning part of the transverse section locates the concave part, it makes the: two grooves inside the single groove and is completely covered; t the convex part makes the sleeve unit no longer able to be pushed inside the needle. And stay still, 0 constitutes-independent hypodermic needle

323-021TWP.ptd 745 200410738 V. Description of the invention (4) The powerful features of the invention, the technical means, and the drawings and figures reached are explained in detail below. The right of a will be followed by specific examples, following the implementation methods: 1 to 3 The first preferred embodiment of the safety needle cover device of the month-evening work of this figure, such as the first, the main guide / can be implemented by subcutaneous injection The injection cylinder 10 or the drip bottle 'the device at least includes-a simple and tightly fixed two longitudinally long ΐ A seat Ϊ shot cylinder 1 10 connecting part 11 as a bridge connection unit 20, 中 7 And a set of sleeves placed on the outer periphery of the cylinder base unit, its 俨 Ϊ 2 ΐ f seat single table 30 ′ is a front end having a smaller diameter pipe body 33, a body having a larger diameter pipe body 35 ′ A flange 351 is provided at each of the larger corresponding positions, and the two flanges 351 ″ are exhausted. The front end of the injection catheter connector of the injection cylinder or the drip bottle may be directly fixed by the inner hole of the larger diameter tube 35. The connection part of the injection cylinder body] 1 ^ and a convex part 3 4 is provided at the outer peripheral part of the front end of the larger diameter tube body 5 5 of the delta diameter; the convex part 34 can be interlocked with the locking groove 225 described below For any feasible shape f, in a preferred embodiment of the present invention, as shown in FIG. 1A, the convex portion 34 is made front-to-back, low to the right, and low to the left, showing a d-shaped break. The shape of the surface is such that the locking protrusion 34 can be easily fitted into the sleeve unit 20, and can be easily removed after being locked into the locking groove 225 described below. In detail, the convex portion 34 includes a first D-shaped surface 341, a second trapezoidal surface 342, and a third shaped surface. Page 8 323.021TWP.ptd 200410738

343, the fourth trapezoidal surface 342, the top surface 345, and the bottom surface. Among them, 誃 34 is characterized in that, except that the bottom surface 34 and the top surface 345 are square, the area of the first surface is larger than the second surface, and the second surface is larger than the third surface. Open the surface, the third surface is the fourth surface, and the top surface 345 is an arc-shaped inclined surface, that is, the upper second surface is inclined at 342 to the lower fourth surface 344. At the same time, The first surface SSL makes an arc-shaped inclination, so that the locking protrusion 34 can be smoothly slid into the locking square groove 225 (see details below).笞 This set of 笞 unit is a hollow pipe body 21 with a sliding groove 220, and a dust cover 22 is shielded above the sliding groove 2J0 to meet sanitation. The front end of the pipe body 21 is provided with an opening 21B. For the expansion and contraction of the needle 4 of the needle unit 40, the length of the chute 220 is less than the length of the tube body 21. In a preferred embodiment of the present invention, as shown in Figure i, the chute material 220 includes Straight portion 221 and a transverse portion 222, wherein the straight portion / includes a front stop portion 221F and a rear turning portion 221R, and the transverse portion 2 2 2 includes a square positioning recess including the first (left) end. 2 2 *, the second (the locking square groove 225 at the right end and a soil-restricting shirt provided at the entrance end of the locking square groove 225), thereby fixing the cylinder base unit 3 in front of the injection cylinder 10 It is sleeved by the sleeve single sleeve 20, and the convex portion 34 can be guided and moved in the chute 22, and the & good guide, the needle 41 can be retracted and retracted freely in the sleeve unit 20; when the barrel When the convex part 34 of the body base unit 30 is located in the positioning concave part 224 (as shown in FIG. 4) of the transverse section 221 before the new product is used, the needle can be made single Yin Yuan ^ 〇 Again The unused 刖 is hidden inside to protect it, so that the needle tip & 1 a of the needle 41 is completely covered and protected, thereby forming an independent needle safety device,

200410738 V. Description of Invention

And the cylinder base unit 30 is connected to the rear part 11 as shown in Fig. 2-3. The connection of the injection cylinder 10 fixed at the end 35 is shown in Figure 2-8 of the QV. When the injection is to be performed, first remove the convex portion 34 of the base = two * from the positioning concave portion 224 (such as (Shown in Figures 5 and 7), = From f, 222, turning 22_ moves forward in the chute 22〇, the needle 41 of this head unit 40 can be opened from the front end of the sleeve unit 20— When entering and exiting until the convex portion 34 moves to the front stop point 221F, the needle 41 is fully exposed, and a telescopic figure is formed; because the operation of holding the sleeve unit 20 by the hand = setting 3 to the needle Beyond 41, there is no need to pass through the needle tip 41a of the needle 41; therefore, there is no danger of injury or virus infection during use, and it is extremely safe. When the injection is completed, the sleeve unit 20 only needs to be operated in the reverse direction. The convex portion 34 = when the stopper portion 221F at the front end of the chute 220, the turning portion 221R at the rear end and the lateral section 222 are moved to the positioning recess 224 at the rear end, The needle unit 40 is once again hidden inside the cannula unit 20, that is, the protection state of the hypodermic needle before use is restored as shown in Fig. 7 and Figure 7. When the base unit 30 is tightened clockwise, the convex The portion 34 then enters the locking square groove 225 by positioning the recessed portion 224, as shown in Figs. 6 and 8. At this time, the convex portion 34 passes the restricting portion 227 and enters the locking square groove 225. The convex portion 34— Once entering the locking square groove 225, it is held in the locking square groove 225. As shown in FIG. 8, since the left side of the top surface of the convex portion 34 is much higher than the bottom edge of the limiting portion 227, the convex portion Once the 34 enters the locking square groove 225, it is difficult for the convex portion 34 to slide out of the restricting portion 227 after being restricted by the restricting portion 227. In this way, it is ensured that the needle tip 41 of the needle unit 40 is permanently hidden in the sleeve

2UU41U738

Sleeve unit 2. Operation; bit] 3. Because in this process, the hand has held the tip 41a of the needle 41. Because / finally located behind the needle 41, there is no need to be infected, so “there ’s no need to be injured or infected by the most important feature of the virus. J female is full-featured; this structural feature 'is to be explained here,% 丄 further ensures that one of the safety sleeves x Ming is better in the embodiment in order to-. Λ early Wu 20 is absolutely safe in use' on the needle When the seat sheet is inserted, let the used contaminated needle 41-after carding, put an end to 2 \ Use 'Specially make the left section of the horizontal section 221 of the T-slot 220 into two " convex section 34 tightly fitted positioning recess m The right section is made to have a locked square groove 2 2 5 after being blocked by I ^ 2 2 7. Since the official soap 7020 is injection-molded from plastic, the design and material selection are engraved. The thinking design makes the restricting portion 227 have good elasticity and toughness, so that after the convex portion 34 is buckled into the locking square groove 225 from below the restricting portion 227, the restricting portion 227 still maintains its original strength. 227 is a thin strip element connected to the body material of the safety sleeve unit 20 One. In order to make it easy to operate, as shown in Figures 1 and 丨 A, the top of the convex portion is made into an arc-shaped inclined top surface from left to right as described above, that is, the second surface facing upwards 3 4 2 is inclined toward the lower fourth surface 3 4 4 and at the same time, it is also inclined from the first surface 3 41 to the third surface 3 4 3 to facilitate the operation of the convex unit 20 when the convex portion 34 easily crosses the restricting portion 227 and enters the locking square groove 225, but once the convex portion 34 enters the locking square groove 225, it is blocked in the locking square groove 225, as shown in Figs. 6 and 8, The left side of the top surface of the portion 34 is much higher than the bottom edge of the stopper portion 227, so once the convex portion 34 enters the lock

200410738 V. Description of the invention (8) After the square groove 225 is stopped, the stopper 227 is restricted, and the convex portion 34 will never slide out of the stopper 2 2 7 again. In this way, after 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 the medical staff or other personnel contacting the needle tube not be injured, and Used needles cannot be used again. This section completely eradicates the possibility of re-cleaning and using used needles by the bad people in low-developed countries. This is the main idea of this invention. And explain.

Another feature of the inventive idea is that an anti-slip convex ring 23 is provided at the middle outer periphery of the sleeve unit 20 of the above embodiment to facilitate the user's finger grip, and the inner wall of the rear end of the sleeve unit 20 is as shown in FIG. 4. As shown, a horn expansion hole 228 and a shoulder portion 229 are formed, because the total size D1 of the height of the convex portion 34 plus the outer diameter of the cylinder 4 seat unit 30 is smaller than the maximum inner diameter D3 of the horn expansion hole 228. The minimum inner diameter D2 of the horn enlarged hole 228, this definition plus the plastic material of the casing unit 20 has good characteristics such as good elasticity and toughness, etc. = only when the injection cylinder 50 and the casing unit 20 are combined This cylinder is called the base unit 30, and the locking protrusion 34 is easy to be inserted into the casing unit 20, and the forming mold structure of the casing unit 20 can be simplified. The total diameter of the diameter is much larger than the casing single

Inch 2, fi can not make the cylinder base unit 3 ° locking convex portion 34 straight. 丨 j limb 早 座 early wood 30 locking convex portion 34 is sleeved into the sleeve; οπ & The pre-heat-joint closure sleeve makes the internal mold structure and assembly quite complicated. ^ Hita Yaki This is another fight for the present invention

Page 12 200410738 V. Description of the invention (9) Please refer to Figures 9-10, for the purpose of explanation. • The second embodiment of the present invention is in the month ::::: The embodiment is implemented in a slender Hypodermic injection cylinder 丨 〇A female full needle sleeve device 30 is fixed by the rear end 35 of the longitudinal cylinder 30 and the base unit m of the longitudinal cylinder base m, as shown in FIG. 9 and 2 length = In the connection example of the cylinder 10A, the safety needle sheath device of the present invention implements the third embodiment of the present invention 10B ^ M ^ ^ ^ ^ Λ 3 0, Λ ^ ^ and the large-diameter tube injection cylinder 10B The connection 邛 / ^ long cylinder 3 0 rear end 3 5 is shown, and can be implemented as the first continuous solid V 2 B of the present invention; 2 sets of 3 solids and: = 10 implemented in the manner shown in the figure. Basically the same as 2 ::, the description is omitted. For example, referring to Figure 11 ®, the present invention can be implemented in a drip catheter connector 70, and n electricity 7. The connecting portion 71 is internally threaded, and is embedded and connected by the flange 351: Ershuo to increase the force. Its fixed strength can be implemented as shown in the above-mentioned first embodiment of the present invention in the manner of Figures 2-3 and 4-8; and this structural feature is substantially the same as the first embodiment of the present invention described above, and the relevant description is omitted. Those who want to emphasize the explanation here are the main idea of the present invention is to provide a needle safety device composed of a cannula unit, a longitudinal cylinder base unit, and a needle element, that is, the needle safety device The I unit uses the cylinder base unit as the needle unit and the syringe: it is easy and tight to fit the bridge, and the operating position is always located at the side of the needle to avoid accidental injury during use and ensure its safety; therefore,

200410738

There is no need to change 彳 glI _ B 7 the original traditional injection cylinder and needle structure of the original J Bu, Gen p " νΤΓ 吉 ϋιrxi J drip catheter connector on the different traditional hypodermic injection cylinders or points L = wide compatibility and applicability, and unique operation intention: the space type formed by the sign is actually the invention invention * f convex ridge and the guide groove and the locking hand in the guide groove :: Or square buckle recesses) are the above-mentioned preferred U: Special examples are not limited to this, there are other ;; ϊτ: column as, 'projection 34 can be changed to a square body or a polygon + 1 ^ 5 I-shaped guide grooves, and it is feasible to combine the rear end turning portions 2 2 1 R and 224 into one. 4+ _5 ‘The invention can be directly used in the simplest way without changing any of the original principles’ Section ΐ ΐ ΐ Section B, it is clear that it is fully in line with the invention: Application for a patent in accordance with the law, please be as early as possible The principle of legislation that rewards Chinese people's inventions in the Patent Law is the representative symbol of the most important part 主; L main shot-the cylinder consists of 1 0 Α slender hypodermic injection cylinder 10B large diameter tube hypodermic injection cylinder 11, 11 A ~ B connecting part 21 Official body 2 1 B opening 22 Dust cover 20 Sleeve unit 220 Sliding groove, Straight portion 221 transverse section (ie, the locking example includes multiple equivalent means, T guide groove Positioning the concave injection cylinder and sleeve to apply for patents with different benefits, hope 0

200410738 Description of the invention (11) 221R rear end turning part 221F front end stop 2 2 4 square positioning recess 2 2 5 lock groove 2 2 7 stop 2 2 8 enlarged hole 2 2 9 shoulder 2 3 anti-slip convex ring 30 cylinder base unit 3 3 smaller diameter pipe body 34 convex portion 341 first D-shaped surface 342 second trapezoidal surface 343 third D-shaped surface 344 fourth trapezoidal surface 3 4 5 top surface 346 bottom surface 3 5 larger diameter Body 3 5 1 Flange 4 0 Needle unit 41 Needle 41 a Needle tip 42 Needle seat 71 Fixed end 70 Catheter connector

323-021TWP.ptd Page 15 200410738 Brief Description of Drawings Figure 1 is a three-dimensional exploded view of a preferred embodiment of the present invention Figure 1 A is a three-dimensional enlarged schematic view of a convex portion of a preferred embodiment of the present invention; FIG. 2 is a sectional view of an unused state of a preferred embodiment of the present invention; FIG. 2A is a partially enlarged sectional view of FIG. 2; FIG. 3 is a sectional view of a used state of a preferred embodiment of the present invention; Figures 6 to 6 are explanatory diagrams of the first to third operating states of the first preferred embodiment of the present invention; Figure 7 is a sectional operating diagram from line 7-7 of Figure 5; Figure 8 is from Figure 6 to Figure 8- Section 8 action drawing; Figure 9 is a schematic perspective view of the second preferred embodiment of the present invention; Figure 10 is a schematic perspective view of the third preferred embodiment of the present invention; Figure 11 is the present invention A perspective view of the fourth preferred embodiment.

323-021TWP.ptd Page 16

Claims (1)

200410738 —------- 6. Scope of patent application 1 · A "multifunctional safety needle cover device / injection cylinder of injection needle, the safety device package ^ 'is suitable for various subcutaneous elements, a set fixed to the Longitudinal cylinder base single ^ A sleeve unit, a head unit and a set of the longitudinal cylinder base unit on the outer periphery of the single longitudinal cylinder base unit are two ends. The rear end of the tube body is provided with a larger diameter tube body, and the smaller diameter tube body is provided with a flange at a corresponding position, and the eosinophilic body diameter at the rear end thereof is the front end of the injection cylinder, and Compare: the diameter or inserted in the convex part; the official body knows that the outer peripheral part is provided with a pin needle unit tightly fixed to the longitudinal smaller diameter tube body; the four sets of official units at the front of the long Jing body base unit are one The hollow pipe body has a chute including a straight portion and a transverse portion, and a long groove is provided. The = stop portion, the rear end turning portion, and the lateral portion, including the front end portion, is- Fine entry: the limit part, the limit body; 〃 Queen needle cover, the body material of the early fan is connected into a tube, the G seat unit can be put on the tube base unit The outer periphery is moving and is well received = when the stopper is just at the middle stop of the long chute of the casing unit, it guides when the convex part moves to the front casing unit of the long chute. Previously, the needle unit at the front end of the cylinder base unit was extended to the rear end of the lateral section for projection. When the convex part was locked in the long chute unit and received a concave part of 卩 疋 °° position, the needle was used. The unit is shrunk by the cover of the righteous sleeve of the sleeve; when the convex portion crosses the limit by the positioning concave portion 323-021TW.ptd page 17 200410738 VI. The scope of patent application = when the square groove is locked, the convex portion is locked in the lock Stopping the cannula prevents the cannula from moving any longer, leaving the needle in the square groove, but holding it in place, thus forming-an independent subcutaneous injection cannula unit. Pipzhuang's safety device for shooting needles 2: : Please: "Multi-functional safety" # ί ::, the department and the chute 'can be set in pairs to increase the guiding effect' so that the sleeve g is earlier than the longitudinal cylinder base unit f Introduced as a stable person. When you move in multiples, please refer to the "Multi-functional device" in the item of the patent scope !, where the convex portion is a D-shaped convex portion, the set has an arc portion and the other side is straight. Ministry.邛 Including one side is 4. For example, in the “Multi-function safety f2ΐ” of the scope of application for patent, the locking convex part is made slightly to the right and left to the left. = ::-Inner back 'and easy to place 5, "The multifunctional safety needle cover is placed" in the first scope of the patent scope, where' the rear end / upper side of the long cylindrical base unit is inserted and fixed In a variety of different ancient times, the main line is doubtful. ㉟Bumen's subcutaneous main barrel or drip tube connector's connection part 6. Please use the "multifunctional safety needle set" in the first item of the patent scope. 忒 The long chute is a long ΐ type chute. 7. 罟 7. Please ask for "Multi-function Safety Needle Cover Dream Set" in the first item of the patent scope, where 'the long chute is a long L-shaped chute.褒 8. If you apply for item 1 of the scope of the patent, “Multifunctional safety needle grommet 323.021TWF.ptd, page 18, 7 Kfi ZUU41U / i8 VI. Application scope __ 1) Set up ^ '1 the tube should be the cylinder The convex portion of the base unit further includes a D-th y-plane, a second trapezoidal surface, a first top surface of the tongue, and a bottom surface, among which, a few second D-shaped surfaces, a fourth trapezoidal surface, and a list ^ ^ ^ ^ The area of the bottom surface and the top surface of the convex portion 34 is square. The area of one side is larger than 坌 — q-shaped, a, ^ ^ ^, the first surface, the second surface is larger than the third surface, and the first W is larger than the fourth. And g is called Di Er ^ / ^ The bei surface is an arc-shaped inclined surface, that is, the fourth surface that is lower from Li Xizhe surface is curved to the fifth surface. The second and third surfaces of the flute are also made. With the arc-shaped inclination, with #: 乂 时 'and then from the first side to the seventh, the locking convex portion can be smoothed by the limiting portion, and the code can be locked into the locking square groove. I4 smoothly 9. If the "multifunctional safety needle cover device" in the scope of application for the patent is "wherein", the hollow tube body is recorded in or. & The body compound is provided with a non-slip ring on its outer periphery. For example, the "disposable safety needle cover device" in the scope of patent application No. 1, wherein a horn is formed on the inner wall of the rear end of the sleeve unit to expand the shoulder, and The top of the convex part is made into an arc-shaped inclined top surface from the front to the back, so that the convex part of the cylinder base unit can be easily inserted into the sleeve unit. Π · For example, the "disposable safety needle cover device" in the scope of patent application, where the left side of the top of the convex part is higher than the limit part, so after the convex part enters the locking square groove, it is restricted. It is difficult for the stopper to slide out of the stopper. Convex 4 757