TWM288188U - Retraction type syringe - Google Patents

Description

M288188 VIII. New Description: [New Technology Field] This creation is about an injection syringe, especially the pointer to Taiwan's new Fengli No. M272540. It can be operated with one hand or two hands after the injection of syrup. Rotating/turning right rotation is pulled back, and the needle is returned to the needle for twisting and bending to break back the pull type firing barrel structure. [Prior Art] Conventional injection needles are used in the back end of the needle holder of the firing syringe in order to prevent repeated use after the injection is completed, or to prevent the medical staff from being accidentally stabbed by the needle after the injection is completed. The utility model has a sleeve hole, which can be engaged with the tapered post of the front end of the push rod. When the injection is completed, the tapered post is engaged with the sleeve hole, and the needle seat can be retracted together with the needle by the pull back of the push rod. In the syringe, the effect of safe use is achieved. However, the tapered stem of the well-known push-pull temple and the fitting hole at the rear end of the needle holder must be tightly fitted, otherwise the needle cannot be pulled back smoothly. Therefore, the opposite is difficult for the medical staff to operate, and if the tapered post at the front end of the push rod and the rear end of the needle holder are too tightly assembled, the injection will cause pain to the injecting person. If the assembly is too loose, the syringe is loaded and filled; when the syrup is sprayed, the pressing of the push rod makes it easy for the tapered post to fit into the sleeve hole of the needle holder and is pulled back when the push rod is pulled back. _ Pull the needle back and you will not be able to continue using it. In addition, some designs are: after the injection is completed, when the push rod is pulled out, the force is used to fit the tapered post with the sleeve hole of the needle seat. If so, the injection liquid remaining in the needle is often ejected. It pollutes the surrounding environment and is not hygienic. Based on this, the other person learns to improve the above-mentioned madness, and replaces the shouting caused by the tight fit in the manner of 5 M288188, that is, the l-shaped fishing trough is placed inside the front end of the syringe while the pusher is The front end group 'slanted elastic pressing rod, and the needle connecting rod ' is assembled outside the elastic pressing rod', and on the outer peripheral surface of the needle connecting seat, there are a plurality of convex granules which can sever the l-shaped fishing trough 'before injection" The injection can be performed by rotating the push rod so that the convex card of the needle connector is inserted into the L-shaped hook groove. When the injection is completed, the push rod is reversed. • Rotate to release the convexity of the needle connector from the L-shaped hook groove, and the needle can be connected to the needle and the needle - and retracted into the syringe. The skewed bullet (four) rod connects the needle. • The ship's bias can push the needle forward to the needle (4), causing distortion to achieve the effect of retracting and damaging the needle. However, the above-mentioned conventional ones still have the following problems: the operation of retracting the needle is not smooth. • Since the L-shaped hook groove is unidirectionally engaged and disengaged, the push rod can only be pulled out when it is pulled out. In one-way operation, the operation will often try to detect the ±± rotation and then withdraw it. If the operation is not correct, the broken edge will not be pulled out smoothly.

After the needle is retracted, the deflection is not enough. Because the retraction of the needle is by the biased social pressure cup. # Tfij The elastic pressure rod is housed in a narrow space, so it can provide limited pushing force itself, and The combined weight of the needle connector and the needle is large, and the deflection of the angle of the bullet is simply used. When the elastic fatigue is achieved, the needle is deflected and then deflected, so that the distortion cannot be performed.

Third, the processing difficulties, the A, the cost of the first one because the L-shaped hook groove is set in the front of the syringe

The inner side, therefore, the 3C assembly method of a ship cannot be carried out, and must be formed in one piece; 6 M288188, and due to the special shape and multiple settings of the L type, not only the design of the demoulding is difficult, but the production cost is relatively difficult to improve. Mass production. The above-mentioned Taiwan new patent No. M272540 certainly solves the problems existing in the above-mentioned conventional problems. However, with the actual use requirements, the creators of this case made a breakthrough design, which provided more convenient effects in practical use. [New content]

The purpose of this creation is to provide an injection syringe that provides a two-way rotary extraction of the hoe, thereby making the actual use more convenient and flexible. A further object of the present invention is to provide a double skewing effect after the needle is retracted, and the syringe is surely skewed to ensure the twisting and bending of the needle after retraction. A further object of the present invention is to provide a needle that can be operated with one hand and that can reliably retract the twisted bend, thereby providing a more convenient injection operation. In order to achieve the above object, the front end inner wall of the syringe of the present invention is provided with a plurality of first convex bodies equidistantly, and the outer peripheral surface of the needle seat is oppositely provided with the same number of second convex bodies. In the misalignment mode, even if the first and second convex bodies are misaligned and assembled, the returning position can be connected. Similarly, when the two are disconnected, the first and second convex bodies can be misaligned by first rotating left/right. In addition, the inner wall of the needle seat is provided with at least two ribs, one end of each rib has a guide surface, and the front end of the push rod is provided with a plurality of guide columns, one end of each guide post is a sloped surface, and the other end is a The abutment surface, so that when the push rod is pushed at the time of injection, the 7 M288188 bevel of the guide column at the front end can be withdrawn along the ribs of the needle seat, and the guide of the guide is smoothly pushed forward. When the rain pushes the needle seat out. _After the lip of the opening of the needle seat, the rain can be re-formed, and the other side of the squirt of the syringe is formed into a heart shape, and the flow path of the needle seat is also lacking in the European And the front end of the front end of the push rod is provided with at least a pressing body, which is abutted against the flow path (4), and has abutting, the protruding convex H is tapered (9) & 'the main pushing when the push rod is pushed Slightly skewed, with energy storage. When the pressure of the injection = is pressed: the front end of the rod forms a needle seat out of the limit state, at this time = 纟 push #, when pulling out, the whole reminder cup is slightly stored by the rigid end, that is, the needle seat is one The side is pushed and skewed. Ρ 'The characteristic of this creative injection syringe is that there is a pusher on the outer circumference of the syringe, and a pull ring is arranged on the push rod, so that the user can borrow the index finger and the middle buckle of the one hand after the injection. For the push piece, the left and right rotations (4) can be performed (4), and the thumb can be pulled into the pull ring with the thumb and the Φ can be pulled out smoothly. According to the above characteristics, the elastic element is further provided between the needle and the push rod of the Chinese acupuncture and the push rod, and the large-diameter injection needle can be injected to inject the 'finger one-handed index finger and the middle finger to the push piece' smoothly. / Money moves _, and when the thumb is pulled out, the elastic element is used to provide appropriate "reinforcement" to ensure that the needle seat can be smoothly pushed out. [Embodiment] The syringe i is used to assemble the needle - the needle 2 needle 3 and the push rod 4, and the elastic member 6 and the like, wherein the syringe 2, 8 M288188 is referred to the second figure, and is hollow at both ends. The cylindrical body has a circular hollow portion 20, and an inner wall whose one end is open is disposed at an interval of ninety degrees as four first convex bodies 21, which are arc-shaped ridges, and the outer peripheral edge of the other end is provided with a convex lip. 22. The inner wall of the syringe 2 is provided with a first abutting portion 23 and a second abutting portion 231, and is integrally formed with a convex ring having a different convex height on the inner wall of the barrel 2, and the first abutting portion 23 of the second barrel The height of the protrusion is greater than the second abutment portion 231. — the needle holder 3, please refer to the third figure, and the assembly is connected to the syringe 2 inside, having a needle _ ferrule 30 and a flow path 31 extending through the ends of the needle hub, wherein the needle ferrule 30 is used to assemble the needle 5. The side of the flow path 31 away from the needle ferrule 30 is formed. The inner surface of the flow passage is provided with four ribs 32 at an interval of ninety degrees, each of the ribs has a guide surface 321 at one end, and the opening of the flow passage 31 is provided with a lip 311. The second protrusion 33 of the same number of the first protrusions 21 is provided on the cylinder 2 at an interval of ninety degrees, which is also an arc-shaped ridge. Also, please refer to the seventh figure, the needle seat 3 a shoulder portion 34 is provided on the outer circumference, and the shoulder portion 34 and the second abutting portion 231 are tightly fitted, and the partial overlap φ provides a leak-stopping effect, and when the push rod 4 is advanced, and can be coupled with the syringe 2 The first abutting portion 23 abuts against the push rod 4 from being excessively pushed. When the push rod 4 is pulled back, the second abutting portion 231 can be conveniently slid along the shoulder portion 34. The first abutting portion 23 and the second abutting portion 231 cooperate with the shoulder portion 34, and can provide the function that the push rod 4 can not be excessively pushed and stopped, and can smoothly slip off. The value is mentioned in the large diameter. Injection needle In the configuration, the needle holder 3 is further provided with a concave ring and a Ο-type leakage preventing ring (not shown) under the shoulder portion 34 of the second abutting portion 231, thereby providing a leak-proof function more effectively. : Small-diameter injection needle 9 M288188 In the structure, it is not necessary to provide a 止-type leak-proof ring.) When the syringe 2 and the needle holder 3 are assembled, they are first assembled in a misaligned manner and then re-imformed to connect the body. Similarly, when the two are disconnected, the first and second convex bodies 21, 33 may be misaligned by first rotating left/right.

For the push sample 4, please refer to the fourth drawing for the 'long column shape' in the syringe 2, which is located on the side of the first convex body 21_ of the syringe 2, and has a neck portion 4 A plurality of guide posts 42 are disposed at an interval of ninety degrees above the neck of the neck, and the end of each of the guide posts 42 is a sloped surface 421, and the other end is an abutment surface 422. One of the guide columns (10) and eight guides is not at the same level as the other three guide posts, but is located near the edge of the neck 40. In addition, the front edge of the push rod 4 and the symmetrical lower portion are respectively provided with two pressing jaws a, which can abut against the heart shape (10) of the flow path 31, and on the side of the convex lip 22 of the syringe 2, There is a disk surface 44 poem for the pusher 4 to push the force basis. In addition, the disk surface 44 of the push rod 4 has a pull ring 45' for the thumb finger to be more convenient for one-hand/two-hand operation, and the ring ring can be set in addition to the ring shown in the figure. A ring having an opening, or a ring such as an L piece, a two piece of interlocking, or a geometric shape other than a circular arc, as long as the thumb can be inserted. The elastic member 6 is disposed between the syringe 2 and the push rod 4, and can adopt a retracting spring, the end 6 of which is abutted against the lip 22 of the barrel 2, and the other end 6o is abutted against the push rod. The disk surface 441 ′ of the 4 is provided with a pusher 24 on the outer peripheral surface of the syringe 2, so as to provide a single-handed operation to retract the twisted and twisted needle, that is, the user can borrow the index finger and the arm of the hand after the injection. The finger clips to the push piece 24, smoothly performs the left-handed/right-swivel control, and provides an appropriate restoring force by the elastic member 6 when the push rod 4 is rotated to ensure that the needle seat 3 M288188 can be smoothly roll out. It should be noted that when the elastic member 6 and the pusher 24 are used for the operation of the syringe of the α-diameter or the hands for the general injection, the arrangement may be omitted. When assembling this creation, please refer to the first figure for the second, third and seventh views. Firstly, the leak-proof washer 41 is assembled to the neck 40 of the push rod 4, and the needle holder 3 is closed to the inner needle barrel 2 Then, the elastic member 6 is assembled to the push rod 4, and then the pusher 4 is sleeved in the hollow portion 20 of the syringe 2, and the syringe 2 and the needle holder 3 are rotated in the left/right direction. The second abutting portion 231 is moved to the first abutting portion 23 to abut against the shoulder portion 34 (seventh figure). Next, the needle 5 is assembled to the needle hub 30 of the hub 3 to be assembled. For continued reference to Figures 3 and 4, in conjunction with Figures 5 to 8, when the push rod 4 is advanced during injection, the inclined surface 421 of the guide post 42 at the end of the guide can follow the guide rib 32 of the needle holder 3. The guide ridge of the face 321 is smoothly advanced to inject the syrup (sixth figure), and in the process of pushing the pusher 4, as shown in the seventh figure, the front end of the push rod 4 is pressed along the flow path. The flared 310 of 31 abuts against the forward direction, and is pressed by the tapered trumpet 31 , until the injection is completed, so that the front end of the push rod 4 forms a slight rightward deviation from the center line (as shown in the eighth figure). Piece 6 is pressed to have energy storage (as in the ninth diagram). When the push rod 2 is to be withdrawn, as shown in the ninth figure, the needle seat 3 is disengaged from the limit state by the left-handed/right-handed dislocation, and the abutment surface 422 of the guide post 42 is pressed against the needle seat. The opening lip 3U of the 3, the energy storage of the elastic member 6, and the retracting force of the push rod $ can stably pull the needle holder 3 back, and at this time, the entire needle seat 3 is released from the limit state, and the push rod 4 By using the front and lower right horizontal guide posts to slightly deflect and the energy storage of the elastic member 6 to form a double recovery kinetic energy, the needle holder 3 is pushed to one side of the M288188, and the needle holder 3 is more inclined. Please refer to the tenth, tenth, and figure, to the tilted needle seat 3 (the tenth figure), by pushing the guide post 42 near the edge of the neck 40 against the bottom of the needle seat 3, pushing the push rod 4 forward And the needle can be squeezed and twisted (the eleventh circle). If so, it can achieve more convenient, flexible and safe results. In summary, the creation of the pull-back syringe can achieve the purpose of creation, and the above-mentioned requirements are only the above-mentioned ones, which are only the preferred embodiments of the present creation, and the various modifications according to the creation. And variations should still be included in the scope of this patent application. [Simple description of the drawing] The first figure is the three-dimensional decomposition of the creation of the pull-back syringe. The first and third figures are partial perspective cross-sectional views of the syringe and the needle holder. The fourth figure is another perspective view of the putter. The six figures are cross-sectional views of the creation of the pullback syringe before and after the injection. The first to the ninth figure is a schematic view of the movement of the needle holder of the creation. Tenth, tenth - the figure is a schematic diagram of the needle being twisted. 12 2M288188

[Main component symbol description] Syringe syringe 1 Syringe needle holder 3 Push rod needle 5 Elastic element Circular hollow portion 20 First convex body lip 22 First abutting portion push piece 24 Needle socket portion Flow path 31 Rib Two convex body 33 Shoulder second abutting portion 231 La 17 octagonal lip 311 Guide surface neck 40 Leakage washer 41 Guide post pressing convex body 43 Disk surface pull ring 45 Inclined abutment surface 422 Compression spring both ends 4 6 21 23 30 32 34 310 321 42 44 421 60, 61 13

Claims (1)

M288188 IX. Patent application scope: 1. A pull-back type injection syringe is used for assembling needles, including: a syringe, which is a hollow cylinder with open ends, a circular hollow portion, an inner wall with one end open, etc. a plurality of first protrusions and a first abutting portion are disposed, and an outer periphery of the opening of the other side is provided with a lip; the needle seat is assembled to the inner side of the barrel having the first protrusion, and has a group for the group Needle a needle ferrule, and a flow path extending through the two ends of the needle holder, and a side of the flow path away from the needle ferrule portion forms a racquet shape, and the inner wall of the flow path at the place is provided with at least two ribs, each rib One end has a guide surface, and the gap between the flow passages is provided with a lip, and the outer peripheral surface thereof is equidistantly provided with the same number of second protrusions as the first protrusion, and can abut against the first abutting portion a shoulder; and a push rod, which is long column-shaped and assembled in the barrel, is located on one side of the first convex body of the barrel, has a neck portion, and is provided with a leakage preventing washer on the neck The upper part is provided with a plurality of guide columns, one end of each guide post is a sloped surface, and the other end is an abutting surface, and the front edge is provided with at least one pressing convex body, which can abut on the horn of the flow channel and the needle The lower edge of the seat, in addition, is located on the convex & side of the syringe and has a disk surface. 2. The pull-back syringe according to claim 1, wherein a second abutting portion is further disposed immediately below the first abutting portion. 3. The pull-back syringe of claim 2, wherein a lower portion of the shoulder of the needle seat corresponding to the second abutting portion is further provided with a concave ring fitted thereto. 4. The pull-back syringe according to claim 1, wherein an elastic M288188 component is further disposed between the syringe and the push rod, and the outer peripheral surface of the syringe is provided with a pusher. 5. The pull-back syringe according to claim 4, wherein the elastic member is a compression spring having one end abutting against a lip of the barrel and the other end abutting against a disk surface of the push rod. 6. The pull-back syringe according to claim 3, wherein the first and second abutting portions are integrally formed with a convex ring of different protrusion heights on an inner wall of the syringe, the first abutting portion The protrusion height is greater than the second abutment. 7. The pull-back syringe according to claim 1, wherein the pull-back syringe is further provided with a pull ring attached to the face of the pusher. 8. The pull-back syringe according to claim 1, wherein the needle holder has a cylindrical shape on one side of the second protrusion. 9. The pullback syringe of claim 8, wherein the first & body and the second convex system are arranged at four equal intervals of ninety degrees. 10. The pull-back syringe according to claim 1, wherein the ribs of the inner wall of the hub are arranged at an equidistant distance of ninety degrees. 11. The pull-back syringe according to claim 1, wherein the guide pillars of the push rod are arranged at an equidistance of ninety degrees, one of which is not in the same horizontal plane as the other three guides. Instead, it is placed near the edge of the neck. 12. The pull-back syringe according to claim 1, wherein the pusher is provided with two pressing systems, that is, the pressing convex system is respectively disposed at a front edge of the push rod and below the symmetry. 13. The pull-back syringe according to claim 9, wherein the first convex body and the second convex body are square or arc-shaped ridges. 15