TWI242457B - Retractable type safety syringe structure - Google Patents

Abstract

This invention is related to a retractable type safety syringe structure which mainly comprises an outer tube, a lid sleeve, a joint base, a push rod and a needle. Among them, the outer tube is a hollow tube body; the front end of the outer tube body fits the lid sleeve, the cavity of the lid sleeve also fits the joint base and the joint base connects with the needle. Also the push rod is installed in the cavity of the outer tube which provides to draw out the injection solution or to inject and pulls the joint base together with the needle into the inside part of the outer tube. The lid sleeve covers the front end of the outer tube cavity and has inner double threads wherein the other side of the tube body connects with a sealed ring by hot melting to make it be sealed up and leakage preventing. The joint base is composed of a projecting small tube and a base body installed in the cavity of the lid sleeve in which the base body has a buckle mechanism of wedging with the push rod to provide the pull rod to pull the joint base to retract into the inside part of the outer tube. This invention takes advantage of the detachable components of the outer tube, the lid sleeve and the joint base. When operating the syringe, the needle base is tightly covered on the projecting small tube by clockwise gyrating the needle by hands, and by dragging the pull rod to draw out the injection solution to directly inject or to be covered by needle lid again, then after detaching the needle and changing a new needle, proceed to inject again. When the pull rod is pulled to the end point of the route, because of the pull rod wedging with the buckle mechanism of the base body of the joint base, the pull rod draws the joint base together with the needle to retract in the inside part of the outer tube, and the object of guarding against needle is achieved.

Description

1242457_ V. Description of the invention (1) II. Description of the invention [Technical field to which the invention belongs] The creation system and the injection needle can be stored inside the syringe to prevent the needle from being exposed after use, resulting in the safety of medical personnel from accidental stabbing of the injection needle. Hazardous retractable safety injection syringes are related, in particular, a retractable safety injection syringe structure that can be replaced with various specifications of injection needles as needed. It uses an outer cylinder, a cap sleeve, and The separation configuration between the connection seats can ensure the feasibility of the injection needle retracting into the inner cavity of the outer cylinder, and improve the safety of the operator of the injection syringe. For the prior art, please refer to the first figure, a tube, a body tube, a tube, and a tube that is pulled or joined to make a small needle with a push and then installed; again, 〇 when the set of injection is a tube, protruding The ejection of the rod and the outer circle of the injection protrudes the injection needle cap and the needle is released through the needle seat tube. The injection tube of the needle tube is ejected by the injection tube. The cylinder is mainly composed of a hollow outer shooting needle. The front end of the outer cylinder is a cone-shaped cylinder with a hollow channel at the center of the protrusion. The needle seat of the injection needle is inserted into the protrusion. The outer cylindrical cone surface and the needle seat of the injection needle are manually pressed into the outer cylinder cavity, and the push rod is drawn through the needle tube, the needle seat and the protruding small tube to be sucked to the predetermined position. After the dose, you can perform the injection operation, loosen your hands and press the needle with the protruding small tube tightly, replace it with a new injection needle, and then perform the injection operation. Note The pushing action of the rod moves the injection solution from the inner cavity of the outer tube through the convex tube into the body. Due to the injection combination of the injection syringe, it is only necessary to compress the injection needle by hand to make it cover.

Page 6 1242457 V. Description of the invention (2) In order to prevent the needle cylinder from being detached during operation during the pressing action of the protruding small tube, the injection tube can be rotated when the outer tube, solenoid and front end are rotated. Tight grooves occur with this header. When injecting a solution through a needle, the injection is performed. Due to the integration, the problem is that in recent years, the needle cylinder has its main component, and the outer shot needle, when the end of the injection, by the push rod and the specialty, the intention of the injection to stop the operation is protruded from a middle tube For small injection needles, a densely set cavity is used for convex injection and suction operations, or the needle is unloaded by the needle person. It is a set-off. The practice is not to participate in the practice. It is easy to see the second picture because it is easy to fall off and squeeze the action person outside the operation. See the second picture, which is the other cylinder, a putter, and a note. The inner cavity of the body seat has a protruding and clamping operation, and the screw is replaced when the injection needle is replaced and formed. The flanged small tube inserted into the cavity, so that when the injection is made, the injection cap is used to draw the injection with a new injection, and the injection is received by the injection needle, which is not drawn by the needle to the pre-handed counterclockwise injection needle. The small tube shoots the needle, and the screw will have the presumed needle rotation, and the staff will not be sure. The traditional injection of the injection needle is caused, and the outer assembly assembled in the syringe is clockwise threaded by the clockwise thread of the catheter thread, and the rod of the thread of the catheter accidentally falls off. After the dose is injected, the injection can be transferred for injection. The outer cylinder, protruding tube, or spiral tube are all shaped needles that have no retractable storage function. In order to solve this problem, a special type of retractable safety injection needle has to be developed in an outer cylinder with a reciprocating The inner cavity of the barrel of the moving putter group is directly connected with a specially made special injection at the front end and the pusher rod is moved to the injection needle to the stroke. The stroke is composed of the front end of the pusher rod and the special injection needle. It should be snapped with an injection needle. At this time, the push rod can be pulled backwards.

Page 7 1242457 V. Explanation of the invention (3) After the special injection operation is completed, the injection can be avoided to avoid the concerns about the function of the injection needle. In addition, the special note made for this purpose is suitable for injection needles. In view of this, this step of research and improvement is clear. The injection needle moves into the inner cavity of the outer cylinder. In this way, when injected, the special injection needle can be retracted into the inner cavity of the outer cylinder, and the injection needle is exposed to the stab wound hazard caused by the outside, but due to its retractable safety There is no replacement of the injection syringe in operation, which causes the safety and sanitation and inconvenience of retracting the injection needle in the operation practice. The type of safety injection syringe is only suitable for its special injection needle, so it cannot achieve the widespread effect. Retractable safety injection syringes are even more desired by medical personnel. The inventor of the case has aimed at the incomplete aspects of the previous inventions, and has finally achieved innovation and industrial use value. [Abstract] The present invention mainly The purpose is to provide a retractable safety injection syringe structure, which uses a relative structure between a cap sleeve, a connection seat and a commonly used injection needle separated from the outer cylinder, so that the connection seat and the injection needle can be retracted into the outside. Safety guard in the cavity. Another object of the present invention is to provide a retractable safety injection syringe structure, which is formed by thermal fusion welding of a cap sleeve and a sealing ring, and a separation structure of a connection seat and an outer cylinder, so that the injection solution can be reliably prevented. Leak reliability. Still another object of the present invention is to provide a retractable safety injection syringe structure, which is formed by thermal fusion welding of a cap sleeve and a sealing ring, and

mm

1242457 V. Description of the invention (4) The adapter and the outer tube can be made from outside. Because of this, the outer cylinder is looped to make a tie with the cover and the injection needle of the connection seat; and then moved, and the needle for the shooting needle enters the cover and is fitted into the double integrated half-circle. The injection liquid is installed from the connector, and the protruding small tube is directly separated from the small tube, and the end of the seat body is closely separated from the sealing ring, which makes the cap sleeve, the connection seat and the outer tube separate. The front end of the structure tube is inserted into the assembly for convenience of automatic assembly. The present invention is a pusher that protrudes against the cylinder to fit the push rod. The outer diameter of the cover head is from the end of the protruding head to the cover head; and the inner cavity is tightly connected to an empty tube. The cover of the small tube device is pumped by the inside of the tube. The end abuts the sleeve adapter tight ligand tube seat. The head is sleeved on the outer wall, and the peripheral cavity of the body leaks a convex cavity cone. The seat is seated on the outer screw. The retractable safety injection needle Tube structure, the inner cavity of the body near the front end is provided There is a protruding body end; the inner cavity of the front cylinder of the outer cylinder is fitted with the connecting seat, and the front end of the inner cavity of the outer cylinder is connected to the inner cavity of the outer cylinder, and can be pulled and pushed for injection, and pulled Lead the connecting base with the other end of the cap in the injection cylinder and go out, and the inner part of the tooth, which is shaped and gradually tapered, is used to create a tube in the cavity by the cavity hood and hot-melt the tube, and expand the convex end by the center. The body joint of the tube at the end of the control body = the effect of tight sealing of the cavity and the effect of preventing leakage. A set of body parts is set with a large and ring, so that the injection needle with a circumferential surface is empty and the seat is seated. The socket is formed with a ring formed on the inner wall of the outer peripheral end of the cover to prevent it; the body structure; of which, the channel and the convex body and the body part generate another positioning cover head sleeve head sleeve

Page 9 1242457 V. Description of the invention (5) The wall leaks out and has the effect of preventing leakage. [Embodiment] The above is an overview of the structure and configuration of the present invention, and the following is a detailed description of preferred and feasible specific embodiments, in conjunction with the drawings. The third figure is an exploded perspective view of the first example of the present invention. The fourth figure is an axial cross-sectional view of the first real socks example of the present invention. The fifth picture is the 2-2 Korean noodle picture of the fourth picture. The sixth figure is an axial cross-sectional view of the use state of the first embodiment of the present invention. The seventh figure is an axial sectional view of the second embodiment of the present invention. Referring to the third to sixth figures, the retractable safety injection syringe structure of the present invention mainly includes an outer cylinder (10), a cap sleeve (40), a connecting seat (30), and a push rod (20). ) And an injection needle (90), wherein the outer cylinder (10) is a hollow tube body, and the inner cavity of the outer cylinder (10) protrudes radially near the front end to form a convex ring ( 1 3) According to the inner cavity of the outer cylinder (10), a front cavity (12) and a rear cavity (14) are formed. The cap sleeve (40) is a tubular body formed by thermal fusion bonding of a cylinder body (400) and a sealing ring (50), and is tightly press-fitted to the front cavity (12); the cap sleeve (40) The outer periphery of the cylinder body (400) is in an interference fit with the front cavity (12) of the outer cylinder (10), and is used for fixing the head sleeve (40); the sealing ring (50) is made of an elastic material (Such as: rubber) formed tubular body, and the seal ring

Page 10 1242457 V. Description of the invention (6) The outer circle of the ring (50) and the inner wall of the front cavity (12) of the outer cylinder are tightly matched to form the front cavity (丨 2) and the cover sleeve (4). 〇) to form a close effect, and to improve the reliability of injection leakage prevention. A plurality of ring-shaped convex teeth (4 5) are arranged adjacent to the inner wall screw ends ® of the hood sleeve (40). The cover head sleeve (40) is provided with a double-threaded thread (4 6) on the inner wall of the barrel body (400). The threads (4 6) have a phase angle of each other of 8o degrees, and the double-threaded screw teeth Each effective screw length is equal to or less than one and a half length of the full tooth, thereby preventing the groove of the double-thread screw tooth from jamming the needle seat (9 2) flange (9 2 1) of the injection needle, making the injection needle unable to retract. To the outer cylinder (丨 〇) cavity. The connecting base (30) is composed of a protruding tube (32) and a body (34)-a body 'and is accommodated in the cavity of the cover sleeve (40); the connecting base (30) The raised ring of the end of the seat body (34) and the inner cavity of the outer cylinder (10)

(/ 1 3) Form a resisting shape, for the purpose of resisting the connection seat (30) after retreating into the outer cylinder (丨 〇) = (14), and the protruding small tube (32) of the connection seat (30) is also included. It is placed in the cavity of the head cover sleeve (40), and expands and extends in a cone shape from the mouth of the head cover sleeve (40) to the inside of the head cover sleeve (40), and is connected with the seat body part (34). ; And the outer circumference of the seat body (34) and the sealing ring (50) of the head sleeve (40) are in an interference fit, so as to form the head sleeve (40) and the connecting seat (30). The effect of close contact between the two can be used to improve the reliability of leakage prevention of injections. In addition, a plurality of button teeth (3 β 2) are annularly arranged on the outer periphery of the seat body portion (3 4), and the button teeth (362) and the convex teeth (45) provided in the cavity of the cover sleeve (40) are mutually connected. card

The system 'is used to restrict the connection seat (30) from forming a spin stopper, thereby providing reliability for the connection seat (30) to engage with the injection needle.

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V. Description of the invention (7) The present invention is composed of an outer cylinder (10) and a pen-shaped wooden detachable configuration. When operating (time 40,), and "block (30)" (9 0) The inner cavity of the seat (9 2) is inserted into the convex if mg 'main injection needle (90)' and the convex seat of the needle seat (92) /, (32), and rotates clockwise (921J IV; The small tube, and through the ^ ^ ^ ^ ^ ^; Λ ί ^ 9! 1 ^^, ί When the two needles enter the same position, by pulling the push rod (2 0), Suction operation of the injection solution. After the injection solution is sucked to a predetermined dose, the injection operation can be performed directly, or the needle cap can be set back, and the injection needle can be rotated counterclockwise by hand, and the injection needle can be removed and replaced with a new one After the needle is injected, the injection operation is performed again. When the pusher (20) pushes the injection solution to the end of the stroke, the front end of the pusher (20) and the seat body (34) of the connection seat (30) The buckle 4 »combination is used for the push rod (20) to lead back the connection base (30) together with the injection needle (g〇) to retract into the inside of the outer cylinder (10), to achieve the safety purpose of needle tip protection; The push rod (20) and the connecting seat (30) The structure of the seat body portion (34) is not necessarily related to the present invention in technology, and is not described in detail. When the first embodiment is assembled, the connecting seat (30) may be firstly inserted into the head cover. Tube (40), and then the cover sleeve (40) together with the connecting seat (30) is inserted from the front end of the outer tube (10) directly into the front cavity (12) of the outer tube (10), and the assembly operation can be completed. It can be seen that, in the present invention, since the connecting base (30) can be directly loaded from the front end of the outer cylinder (10) to complete the assembling operation of the connecting base (30) due to the assembly process, the connecting base (3) is improved accordingly. 0) Convenience of assembly

Page 12 1242457 V. Description of invention (8). Furthermore, when the injection needle (90) is installed, the flange (9 2 1) of the needle seat (9 2) is pushed by the thread (4 6) due to hand rotation, and is screwed into the cap sleeve ( 40) Inside, when the end flange (921) of the needle base (92) reaches the end of the thread (4 6), the needle base (9 2) is tightly sleeved with the small tube (3 2). Use the push rod to extract the injection solution into the inner cavity of the outer cylinder to a predetermined dose, and perform the injection operation. Or, when the injection solution enters the inner cavity of the outer cylinder to reach a predetermined dose, the needle is put back on the needle seat, and the needle seat is rotated counterclockwise by hand to remove the used injection needle and replace it with a new one by the same operation method. Injection needle, and then perform the injection operation. 'The second embodiment of the present invention is obtained by changing the foregoing first embodiment, and the same points of the two φ will not be repeated; please refer to the ninth figure, the second embodiment of the present invention mainly includes an outer cylinder (1 0 '), a push rod (2 0'), a connection seat (30 '), a cap sleeve (40') and a sealing ring (50 '), wherein the sealing ring (50') The ring is tied around the outer periphery of the seat body (36 ') of the connecting seat (30') and forms an interference fit, so as to improve the reliability of anti-leakage. The foregoing are specific and feasible preferred embodiments and design drawings of the present invention, but these embodiments and design drawings are merely examples and are not intended to limit the scope of the rights of the technology of the present invention. Those who apply for the scope of rights covered by the scope of patent application and implement it are the scope of rights of the applicant without departing from the scope of the invention.

Page 13 1242457_ Brief description of the diagram The first diagram is a schematic diagram of a conventional injection syringe structure. The second figure is a schematic diagram of another conventional injection syringe structure. The third figure is an exploded perspective view of the first embodiment of the present invention. The fourth figure is an axial sectional view of the first embodiment of the present invention. The fifth figure is a sectional view taken along the line 2-2 of the fourth figure. The sixth diagram is an axial cross-sectional view of the use state of the first embodiment of the present invention. The seventh diagram is an axial cross-sectional view of the second embodiment of the present invention. Description of component representative symbols: Outer cylinder (1 0), cylinder body (400), front cavity (1 2), convex ring (1 3), push rod (2 0), rear cavity (1 4), connection seat (30), teeth ( 3 6 2) Small tube (3 2) Seat body (3 4) Head sleeve (40) Sealing ring (50) Convex teeth (45) Thread (4 6) Injection needle (9 0) Needle seat (9 2 ) Flange (9 2 1) Outer cylinder (1 0 ') Push rod (2 0') Seat (30 ') Seat body (3 6') Sealing ring (5 0 ') Cover sleeve (40' )

Page 14

Claims (1)

1242457 VI. Application for patent scope 1. A retractable safety injection syringe structure with a capped tube as the inner cavity end; the needle moves into the middle of the thread injection needle sleeve and the needle retracts. In addition, the socket can be connected with the socket-shaped sleeve of the seat body, the hollow tube and the push rod for the outer cylinder head cover, and the sleeve body is screwed into the inner wall through a tight sleeve. Its front end is connected with the hijab to prevent rotation. It mainly includes an outer cylinder, a connection seat, a push rod and an injection needle. Among them, the outer body, whose seat connection device is inside the medicinal fluid pumping cylinder, presents the screw teeth. The end of the connecting seat tooth is connected with a hollow flow and injection in the push-out cylinder; and the sleeve cavity. The inner cavity of the front end is sleeved with the cover head, so that the connecting seat and the inner cavity of the outer cylinder can be taken in or injected, and the tubular body is pulled, and the protruding head is adjacent to the protruding small tube cone of the needle seat of the injection needle. A plurality of rings protrude through a small tube and a body rod is buckled and combined, and a donor is provided; the small pipe is protruded and is accommodated in the needle seat of the cap needle, and the convex teeth in the ring-shaped inner periphery of the seat body are mutually The clamping tube is sleeved, and the cover sleeve is placed in the inner cavity of the outer tube to pull and push the connection seat together with the injection sleeve edge card cylindrical surface portion, and the inner wall is restored after passing through the 头 hood. According to the above, the convex body that is placed on the back of the cylinder extends a number of buckles to limit the setting of the double to advance the teeth of the hijab; the belt injection is in the cone body and extends to With the tooth, borrow the connection 2. The retractable safety injection syringe structure described in item 1 of the scope of patent application, wherein the cover sleeve and the connection seat are three separate components from the outer tube. 3. Retractable safety injection syringe knot as described in item 1 of the scope of patent application Page 15 1242457_ 6. The scope of the patent application, in which the effective thread length of the double thread is equal to or less than one-half of the full thread length. 4. The retractable safety injection syringe structure according to item 1 of the scope of the patent application, wherein a seal ring is provided at the rear section of the cover sleeve, the seal ring and the inner cavity of the outer cylinder, and the seal ring and the There is an interference fit between the connecting seats, which is provided for those who improve the reliability of anti-leakage. 5. The retractable safety injection syringe structure described in item 4 of the scope of patent application, wherein the sealing ring is a tubular body formed of an elastic material, and the sealing ring and the head sleeve are thermally combined Form one. Page 16