TWM266057U - Structure of back contracting type safe injection syringe - Google Patents

Description

M266057 4. Creation Instructions (1) 2. Creation Instructions [Technical Field of Creation] This creative department and injection needles can be included in the syringe to prevent the needles from being exposed after use, resulting in the safety of medical personnel accidentally stabbed by injection needles. 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 required. It uses an outer cylinder and a cap sleeve m 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.

[Prior art]

Please refer to the first figure. The traditional injection syringe is mainly composed of a hollow outer cylinder, a push rod and an injection needle. The front end of the outer cylinder is integrally connected with a cone-shaped outer circumference and is provided in the center. The protruding small tube of the hollow flow channel. When the injection needle is installed, the needle seat of the injection needle is held in the protruding small tube by hand, and the cone cylindrical surface protruding from the outer circumference of the small tube and the needle seat of the injection needle are joined by hand. ; And the push rod is axially installed in the outer cylinder cavity, and the injection liquid is sucked into the cylinder cavity through the needle tube, the needle seat, and the protruding small tube by the push rod pulling action. After the injection solution is pumped to a predetermined dose, the injection operation can be performed directly, or the needle cap can be set back, and the needle can be loosened and pressed by the protruding small tube, and the injection needle can be removed and replaced with a new injection needle. , And then perform the injection operation. The injection operation is to push the injection liquid from the inner cavity of the outer cylinder through the small tube, the needle seat and the needle tube into the body through the pushing action of the push rod. Because the injection needle of the injection syringe is engaged with the protruding small tube, only the hand is used to compress the injection needle to cover it.

Page 6 M266057, creation instructions (2) In order to prevent the injection syringe from being removed during operation, the small tube is pressed tightly, in which the outer bow and the front end of the screw cylinder rotate the guide bow I clockwise. The sulcus and the occurrence of the needle. When the injection is performed, the injection needle can be used for this injection. Due to the integration, the problem is that in recent years, the syringe is the main component, and when the end of the injection needle, the accident caused the injection needle to stop the operator by the push rod and the special operation, should be caused by In one, the outer tube has a small tube and a small protrusion. The injection needle is inserted tightly around the flange of the seat cavity to perform the suction operation of the injection needle, or the needle is removed. The critical pressure action when the person falls out of the human body (increase) is to make the injection projected. After the needle is not drawn, the needle will not be branched to the predetermined counterclockwise. Or the solenoids are the function of the retractable storage of the shaped injection needle. In order to solve the problem, a special injection needle retraction type was developed. The injection should be tied to an outer cylinder with a reciprocating pusher. The inner cavity of the set of cylinders is directly connected with a special field to clamp the pusher in the direction of the injection needle. At this time, pull the pusher backwards, and you can read it as intended. Outlet control of two inner cavity cavities, when in operation, injection needle cap Note the new members are not really dangerous. Causes the injection of the small tube of the M needle set of another transmitting needle, and the dose after the accidental push by the spiral solenoid is rotated. The line is explained on page 7. M266057 IV. Creative Instructions (3) | Lead The special injection needle is displaced into the inner cavity of the outer cylinder. In this way, after the injection operation is completed, the special # injection needle can be retracted into the outer cylinder inner cavity, so as to avoid the formation of the exposed needle + the outside Danger of stabbing, but because the retractable type | full syringe of this special injection needle does not have the function of replacing the injection needle during operation, it causes concerns about safety and hygiene and inconvenience during operation.

Moreover, the Ning shrink type safety injection syringe of this special injection needle is only suitable for its special made special injection needle, so Ufa has achieved a widespread effect. Therefore, a retractable safety injection syringe suitable for injection needle is more medically used. The staff hopes that, in light of this, the author # of this case further researched and improved the unfinished parts of the previous creation, and finally obtained an innovative and industrially valuable original creation. [Creation content] That is, the main purpose of this creation is to provide a retractable safety injection syringe structure, which is connected by a relative structure between a cap sleeve, a connection seat and a commonly used injection needle separated from the outer cylinder. The seat and the injection needle can be retracted into the safety guard of the outer cylinder cavity.

Another purpose of this creation is to provide a retractable safety injection syringe structure, which is formed by thermal fusion welding of the cap sleeve and the sealing ring, and the separation of the connection seat and the outer cylinder, so that the injection solution can be reliably prevented. Leak reliability. Another purpose of this creation 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

Page 8 M266057 IV. Creation instructions (4) The separate structure of the socket and the outer cylinder allows the structure of the cover sleeve, the connecting seat and the outer cylinder to be inserted from the front end of the outer cylinder, for convenience of automated assembly .

For this reason, this creation is a retractable safety injection syringe structure 'wherein the outer tube is a hollow tube and the inner cavity of the body near the front end is provided with a raised ring as abutting the connection seat body The front end of the outer tube body is sleeved with the head sleeve, and the inner cavity of the head sleeve is sleeved with the connection seat ', and the protruding small tube of the connection seat is provided at the front end of the inner cavity of the outer tube' The injection needle is connected; and the pusher device Qin the inner cavity of the outer cylinder can perform pulling and pushing motions, so as to extract or inject the liquid medicine, and pull the connection seat with the injection needle into the inner cylinder of the outer cylinder; The cap sleeve is a pipe body sleeved at the front end of the inner cavity of the outer cylinder, and the outer periphery is fitted to the inner wall of the front end of the outer cylinder. The other end of the body is thermally fused with a sealing ring to form a body, and the outer circumferential surface of the barrel is closely matched with the inner cavity of the outer barrel, so as to prevent the injection solution from leaking from the inner cavity of the front end of the outer barrel, thereby preventing leakage. ;

The connecting base is mainly composed of a protruding small tube and an integral body, and is installed in the cavity of the cover head sleeve to insert an injection needle; wherein the protruding small tube is a cone-shaped column with an outer circumference and a center A hollow flow channel is provided, and the diameter of the protruding small tube is gradually enlarged from the protruding end to the root and is connected with the seat body part. The end of the seat body part abuts the convex ring of the outer tube, and the other end of the seat body part The shoulder is close to the end of the screw of the head sleeve, so that the connection seat has a positioning and clamping effect; and the outer circumferential surface of the seat body of the connection seat has a close fit with the inner cavity of the sealing ring of the head sleeve. Anti-injection solution from inside the cap sleeve

Line 9 is better than it is. , The detailed description of the outline of the detailed form of the composition of the composition and the combination of the implementation of the implementation of the first to the first to make the first mapping to make the warehouse | * four creation of this book this book series The figure is a diagram illustrating an example of the sectional view to the vertical axis, and the actual plan view is shown in FIG. The axial cross-section of the axial view. Use the axis diagram to make the surface example and apply it -2 real M266057 Fourth, the creative instructions (5) The wall leaks, which has the effect of preventing leakage. Please refer to the third to sixth drawings. The retractable safety injection syringe structure of this creation mainly includes an outer cylinder (1 0), a cap sleeve (40), a connecting seat (30), and a push rod ( 20) and an injection needle (90), wherein the outer tube (10) is a hollow tube body, and the inner cavity of the outer tube (10) protrudes radially near the front end to form a convex ring (13) ), According to which the inner cavity of the outer cylinder (10) forms a front cavity (1 2) and a rear cavity (1 4). 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 (40 0) 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 elasticity A tubular body made of material (such as rubber) and the ring

Page 10 M266057 Creative instructions (6) The inner wall of the cylinder (10) front cavity (12) is tightly matched, and a close effect is formed between the hijab sleeve (40), which is suitable for those who depend. A plurality of ring-shaped convex teeth (45) are screwed on the inner wall of the cover head sleeve (40). Double-threaded threads are provided on the inner wall of the cylinder body (400). The phase angles of the two-threaded threads are 丨 80 ° each other, and the double-threaded threads are equal to or less than one and a half lengths of the full teeth. ) Flange (9 2 1) to make the barrel (10) cavity. The outer circle of the ring (50) is adjacent to the outer circle to form the anterior cavity (12) and the dentible end that enhances the leak-proofness of the injection solution, and the cover sleeve (40) (4 6) is additionally provided, and each thread (4 6 ) The effective screw length of each tooth can not be retracted to the outside.

The connecting seat (30) is composed of a protruding small tube and a body (34), and is accommodated in the cavity of the cover sleeve (40); the seat body of the connecting seat (30) ( The end of 34) forms a resisting shape with the convex ring (/ 3) of the inner cavity of the outer cylinder (10), and is provided for resisting the connecting seat (30) after being retracted into the outer cylinder (丨 〇), (14) And the protruding tube (32) of the connecting seat (30) is also accommodated in the cavity of the cover sleeve (40), and from the mouth of the cover sleeve (40) to the cover sleeve (40); ) The inner part expands and extends in a cone shape and is connected with the seat body part (34); and the outer circumference of the seat body part (34) and the sealing ring (50) of the head sleeve (40) are in an interference fit. In order to form a close effect between the cap sleeve (40) and the connecting seat (30), it is provided for those who improve the reliability of the leakage prevention of the injection solution.

In addition, a plurality of buckle teeth (36) are arranged annularly on the outer periphery of the seat body (34), and the buckle teeth (362) and the convex teeth (45) in the cavity of the cover head sleeve (40) are locked with each other. According to this, the connecting seat (30) is restricted from forming a rotation stop, and the reliability of the connection of the connecting seat (30) with the injection needle is restricted. ^ This creation uses an outer cylinder (1 0), a cover sleeve (40), and a connection base (30).

Page 11 M266057 4. Creation instructions (7) The composition of the separate configuration, when the injection syringe field (90) is operated to put the inner cavity of its needle seat (92) into the protrusion, use = take-injection needle = ". ), Made by the flange (921) (32 cards) of the needle seat (92); =? Turn (4 0) in the tooth groove of the internal cavity screw tooth, and due to clockwise rotation, the convexity of the main needle seat cavity The edge (921) is subjected to the spiral screw 'ten (90), so that the solid ground sleeve is tightly closed to the small tube, and by the stop of the two cavity flange (921) of the ννννίνΛΤ, the injection needle does not There will be sound. occur. When performing the injection syringe # work, the pumping operation of the injection liquid is performed by pulling the pusher ^. When the injection solution is pumped to a predetermined dose, or the needle cap is set back, rotate the needle counterclockwise by hand, remove the needle, replace it with a new needle, and then enter the main Shooting operation. When the push rod (20) pushes the injection solution to the end of the stroke, 'the front end of the push rod (20) and the seat body (34) of the connection seat (30) are combined with each other' for the push rod ( 2) The lead connection base (30) together with the injection needle (90) retracts into the inside of the outer cylinder (10) to achieve the safety purpose of needle tip protection; as the push rod (20) and the connection base ( The composition of the seat body (34) of 30) is not necessarily related to the technical aspects of this creation and is not described in detail. When the first embodiment is assembled, the connecting seat (30) can be inserted into the head sleeve (40), and then the head sleeve (40) together with the connecting seat (30) can be removed from the outer cylinder. (10) The front end is directly inserted into the outer cylinder (10) and the front cavity (12) is connected, and the assembly operation can be completed. It is known that the connection seat (30) can be directly connected to the outer cylinder from the outer cylinder because of the assembly procedure. (10) The front end is installed to complete the assembling operation of the connecting base (30), and the convenience of assembling the connecting base (30) is accordingly improved.

Page 12 M266057 Fourth, the author (8). Furthermore, when the injection needle (90 $ is installed, its flange (921) of the needle seat (92) is subject to the thread C4 6 due to hand rotation), and it is screwed into the inside of the cap sleeve (40). When the end flange (921) of the needle base (9 2 |) reaches the end of the thread (46), the needle base (9 2 |) is tightly sleeved with the small tube (3 2), and a push rod can be used. Extract the injection solution into the inner cavity of the outer cylinder to a predetermined dose for injection operation. Or, when the injection + into-into the inner cavity of the outer cylinder reaches the predetermined dose, put the needle back on the needle seat, rotate the needle seat with the hand + clockwise, and remove the used injection needle with the same operation Methods Replace the needle with a new one. The second embodiment of this creation is derived from the changes of the first embodiment described above, and the similarities between the two are not repeated; please refer to the ninth figure, the second embodiment of this creation mainly includes an outer tube (丨 〇 ' ), A push rod (20,), a connection seat (30 '), a cover sleeve (40'), and a sealing ring (50,), wherein the sealing ring (50,) ring bundle An interference fit is formed on the periphery of the seat body 6,) of the connecting seat (30,), so as to improve the reliability of anti-leakage. The foregoing are the specific and feasible preferred embodiments and design drawings of this creation, but these embodiments and design drawings are only examples and are not intended to limit the scope of the rights of this creation technology. All equal technical means or Those who implement the scope of rights covered by the scope of patent application shall not deviate from the scope of creation and shall be the scope of rights of the applicant. &

Page 13 M266057 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 this creation. 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 figure is an axial cross-sectional view of the state of use of the first example of this creation. The seventh diagram is an axial cross-sectional view of the second practical example of this creation.

Description of component representative symbols: Outer cylinder (1 0), cylinder body (400), front cavity (12), raised ring (1 3), push rod (2 0), rear cavity (1 4), connection base (30), teeth (3) 6 2) Small tube (3 2) Seat body (34) Hedging sleeve (40) Sealing ring (50) Convex teeth (45) Thread (4 6) Injection needle (90) Socket (9 2) convex Edge (9 2 1) Outer cylinder (1 0 ') Push rod (20') Seat (30 ') Seat body (3 6') Cover sleeve (40 ') Sealing ring (5 0')

Page 14

Claims (1)

M266057 5. Scope of patent application 1. A retractable safety injection syringe structure, which mainly includes an outer cylinder, a cap sleeve, a connection seat; --- push rod and an injection needle; wherein the outer cylinder is The hollow tube body has a front poplar inner cavity fitted with a hijab sleeve, and the inner cavity of the hijab sleeve is fitted with a connecting seat so that the connecting seat is placed at the front end of the inner cavity of the outer cylinder; The inner cavity of the outer cylinder can be pulled and pushed to carry out extraction or injection of the medicinal solution, and pull the connection seat together with the injection needle into the inside of the outer cylinder; 1 The hijab sleeve is a tubular body, and a double-threaded screw is provided on the inner wall of the hijab sleeve. The screw is locked with the flange of the needle seat of the injection needle, so that the injection needle is tightly sleeved on the connection seat. The conical cylindrical surface of the projecting small tube; a plurality of ring-shaped convex teeth are arranged adjacent to the end of the screw on the inner wall of the cover sleeve; the connecting seat is composed of a projecting small tube and an integral body In which, the seat body is combined with the pusher buckle for the person who retracts into the outer cylinder through the pusher lead injection needle; the protruding small tube is < It has a hollow flow channel and is accommodated in the barrel of the cover sleeve, so that its front end is engaged with the needle seat of the injection needle, and its rear end is extended to connect with the seat body; and the outer peripheral ring of the seat body A plurality of sprocket teeth are arranged in the shape, and the sprocket teeth and the convex teeth in the cavity of the cover head are locked with each other, and the connecting seat is restricted to form a spin stopper. 2. The retractable safety injection syringe structure described in item 1 of the scope of the patent application, wherein the cap sleeve and the connection seat are three separate components from the outer cylinder. 3. Retractable safety injection syringe knot as described in item 1 of the scope of patent application Page 15 M266057_ 5. 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 described in item 1 of the scope of the patent application, wherein a seal ring is provided at the rear section of the cap 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 as described in item 4 of the patent application scope, wherein the sealing ring 楱 is a tubular body formed of an elastic material, and the sealing ring is connected to the cap sleeve Thermal fusion to form one. Page 16