TWM411948U - Structure to retract the needle head of safety injection needle cylinder - Google Patents

Description

On June 17th, 100th, the shuttle is replaced by M411948. V. New description: [New technical field] [0001] This work is about a safe injection syringe, which automatically forms a closed seal during the injection process. The chamber, the sealed chamber is ready to inhale the needle, and the purpose of automatically retracting the needle can be achieved. [Prior Art] [0002] A conventional structure, please refer to the figure shown in Figure 9, which is a new type of national

The "disposable safety syringe device" of the No. M286674 includes a needle 91, an engaging portion 92, a syringe 93 and a piston 94. The needle 91 includes a needle tube 911 and a needle holder 912. The needle hub 912 is sleeved on a tubular bearing seat 921 on the front end surface of the engaging portion 92; the engaging portion 92 is placed at the front end of the inner tube of the syringe barrel 93 and fixed, and the system has a body flow forming body. The body has a tubular bearing seat 921 having a small diameter to form a needle 91, and one or more annular grooves 922 are formed on the outer circumferential surface for each of the ring rings 923. A pivoting piece 924 of a suitable thickness is disposed on the rear end surface thereof, and the pivoting piece 924 is connected to the rear end surface of the engaging portion 92 by a connecting piece 925 at the edge thereof, and the connecting piece 925 forms a pivoting piece 924. The pivoting piece 924 can be attached to the rear end surface of the engaging portion 92 or pivoted away from the rear end surface by the connecting piece 925 as a pivot; and the circular rotating hole 926 of the appropriate diameter is provided in the center of the pivoting piece 924. To the inner flow space of the connecting portion 92; the piston 94 is reciprocally pushed and pulled in the syringe 93, and the outer edge of the front end The surface is provided with an annular groove for arranging the sealing ring 941, and a front end surface thereof is provided with a protruding column 942 corresponding to the center of the pivoting piece. The protruding column 942 has a suitable height and a hook portion is arranged at the top end. Conical head end of 943; thereby, when the piston 94 is pushed forward to make the conical head end on the stud 942 form number A0101 page 3 / total 22 pages M411948 100 June 17, revised replacement page arrived When the perforation is applied, the piston can be pushed again to force its conical head to force into the perforation and be hooked by its hook 943; then, when the piston 94 is pulled back in the reverse direction, the pivoting piece 924 The arm can be pivoted away from the rear end face to form an inclined state, and the connecting piece 92 and the upper needle 91 thereof are pulled backward by the connecting piece to be retracted to the inside of the barrel 193. [New content] [0003] (To solve the technical problem) However, in the above-mentioned conventional structure, in order to achieve safety purposes, the user must perform the following actions: When the needle 91 is tilted, the piston 94 must be forced forward to make the needle 911 After bending, the piston 94 is pulled back to the predetermined position and then the preset position of the piston handle 944 is broken; it can be seen that the use of the aforementioned conventional structure is rather troublesome (technical solution to the problem)

In view of this, the creator created a safety injection syringe retracting needle structure based on long-term research and conception of a safe injection syringe, which includes: an outer cylinder, which is a circular cylinder and The end has a terminal chamber for the elastic rod of the inner piston rod to be engaged; a needle includes a metal needle and a joint, and a push groove is provided in the joint, and the whole is from the outer cylinder The rear group is disposed at the front end of the outer cylinder; an outer piston rod is circularly hollow and has an axial sliding groove at a periphery between the middle portion and the end portion, and the outer piston rod is set to sink into the outer cylinder Internally, and the inside of the front end of the card is inserted into the needle member; a pull needle member includes a fitting tapered portion and a rubber pad portion; wherein the fitting tapered portion of the pulling needle member corresponds to the pushing groove of the needle, The rubber pad portion of the pulling needle member is tightly fitted to the inner front end of the outer piston rod; an inner piston rod is connected with a resilient protruding rod at the end thereof, and the elastic protruding rod protrudes from the sliding groove of the outer piston rod and the outer cylinder The inner wall is in conflict; Form No. A0101 Page 4 / Total 22 pages I? The inner diameter of the end chamber of the cylinder is larger than the inner chamber of the outer cylinder body, so that a gap is formed between the inner diameter of the end chamber and the inner diameter of the body, wherein a front end of the outer piston rod is provided with a pushing hole for the pulling rod The plastic dome is aged, and the push hole is a front narrow rear width; wherein the outer piston rod and the corresponding ribs thereof and the corresponding ribs run through at least the perforation, and the side of the rib around the perforation Each side is set to a hypotenuse;

Wherein the outer circumference of the outer piston rod is provided with a plurality of axial ribs; wherein a ring-shaped rubber pad is arranged between the flange provided at the end of the needle and the inner front end of the outer cylinder, and the annular rubber pad is tightly fitted a front end of the cylinder and a flange; wherein the elastic rod of the inner piston rod is radially protruded from the end thereof; the small portion is extended after the front end of the inner piston rod is bent at 90 degrees; and the inner piston rod is extended a plurality of axial ribs are arranged around the outer circumference;

Wherein the inner piston rod is provided with a flange at the middle portion thereof, so that the inner piston rod plug: the inside of the rod is less yaw when moving; the valve is injected at the beginning - speaking, and the 丨 is also 仟; A closed chamber is formed behind the pull rod member in the outer piston rod; the continuous pressure is 33⁄4 4 days*, and the pull needle member is retracted by the reaction force and the tightening force at the pull needle member When it is smaller, the needle and the needle are subjected to atmospheric pressure, which is equivalent to the suction force of the vacuum chamber in the rod, and enters the sealed chamber. Safety, the main purpose of this creation is to provide a convenient operation of the needle cylinder retracting needle structure, and the secondary purpose of this creation: in the form number coffee 1 safer safety injection syringe _ needle structure Another objective of the nuclear replacement page is to provide a safe injection retraction needle structure that facilitates resource recycling and reuse. (Compared with the efficacy of the prior art) As can be seen from the above description, this creation can achieve the following effects compared to the prior art:

1. During the creation of the creation, a closed chamber is generated between the outer piston rod and the inner piston rod, so that the needle is sucked into the injection, so that the user does not need to press the outer piston rod to bend the metal needle tube and break the outer piston rod. That is, the needle can be sealed inside the outer cylinder and discarded, so as to achieve the purpose of safely injecting the syringe; therefore, the creation is quite simple, easy and convenient in operation and use. 2. Since the creation system inhales the needle into the outer piston rod, the needle is discarded by the double-layer coating of the outer piston rod and the outer cylinder, thereby ensuring that the needle is not exposed outside the outer cylinder during transportation; Therefore, this creation can achieve a safer syringe.

3. Since the outer piston rod of the present invention and the corresponding rib around the sliding groove and the corresponding rib extend radially through at least one perforation, the perforation can facilitate breaking the body of the outer piston rod; therefore, when the creation is discarded after the injection is completed, The outer piston rod can be taken out from the outer cylinder, and then the needle is broken and the needle is taken out, and the plastic parts and metal parts of the creation are sorted and recovered to achieve resource reuse. [Embodiment] [0004] First, referring to the figures shown in Figures 1 to 2, the present invention relates to a structure for a safety syringe retracting needle, which comprises: an outer cylinder 1 and a needle 2' - outer piston rod 3' - pull needle member 4 and inner piston rod 5; wherein, the outer cylinder 1 is made of a transparent material of the body 10 and its horizontal form number Α 0101 page 6 / total 22 pages M411948 On June 17, 100, the replacement page was replaced.

The cross section has a circular hollow shape, and a tapered inner hole 12 is provided at the front end thereof, and two opposite fins 15 are disposed at the ends thereof, and a joint end portion of the two fins 15 and the body 10 is provided with a terminal end. The chamber 13 has a tapered inner hole 12 for the needle 2 to penetrate, and the coupling seat 22 provided by the needle 2 is tapered and corresponding to the tapered inner hole 12 to generate a self-locking state to fix the The needle 2; the inner diameter of the end chamber 13 is larger than the inner diameter of the body 10, so that a gap 16 is formed between the inner diameter of the end chamber 13 and the inner diameter of the body 10, and the drop 16 is for the inner piston to push 5 The elastic protruding rod 51 is engaged, and a ring-shaped rubber pad 14 is disposed between the bottom of the outer tube 1 and a flange 221 provided at the end of the needle 2. The annular rubber pad 14 is tightly fitted into the outer tube 1. At the bottom of the bottom, the outer cylinder 1 has the effect of stopping liquid leakage;

The needle 2 includes a metal needle 21 and a joint 22, and the joint 22 is integrally formed of a transparent plastic and fixed to the end of the metal needle 21, and the inside of the joint 22 is provided with a push-out groove 222 and a metal. The needle tube 21 is in communication, and the outer circumference of the coupling seat 22 is also tapered and corresponds to the tapered inner hole 12 at the front end of the outer cylinder 1, so that the needle 2 can be tightly fixed to the front end of the outer cylinder 1; The rod 3 is a hollow body 30 having a piston sleeve 301 at its front end and a pull rod member 4 therein, and a flange 302 is disposed at the end of the rod body 30, and the outer piston rod 3 is further disposed. It is set to sink into the inner portion of the outer cylinder 1, and an axial sliding groove 33 is provided between the middle of the rod body 30 and the flange 30 2 . The sliding groove 33 is for the protruding rod 51 of the inner piston rod 5 to be worn. Extending; an inner piston rod 5 is disposed immediately behind the pull rod member 4; further, the outer circumference of the outer piston rod 3 is provided with a plurality of axial ribs 36, and the outer piston rod 3 is opposite to the sliding groove 33 thereof. The ribs 36 around and corresponding thereto extend radially through at least one of the through holes 35, and the sides of the ribs 36 around the through holes 35 are respectively set to beveled edges 361. Form No. A0101 Page 7 of 22 M411948 On June 17, 100, the replacement pin page is composed of a fitting tapered portion 41 and a rubber pad portion 42, wherein the rubber pad portion 42 is The fitting taper portion 41 of the pull pin member 4 is tapered and corresponds to the pushing and receiving groove 222 of the coupling seat 22 of the needle 2, and the fitting taper portion 41 and the push-pull portion 41 are sleeved. When the slot 222 is combined, the self-locking state can be generated to make the pull-pin member 4 and the needle 2 have a linkage effect; and the pull-tab member 4 is disposed on the tapered inner hole 32 at the front end of the outer piston rod 3 (as shown in FIG. 7 and The inner piston rod 5 is a circular solid rod, and a resilient protruding rod 51 is attached to the end thereof. The elastic protruding rod 51 protrudes radially from the end of the body 50. The front end of the inner piston rod 5 is bent 90 degrees and then extended for a period of time. Therefore, the elastic protruding rod 51 is substantially L-shaped. When the inner piston rod 5 is assembled to the outer piston rod 3, the elastic protruding rod 51 is convex. The sliding groove 33 of the outer piston rod 3 is in contact with the inner wall 111 of the outer cylinder 1; further, the outer circumference of the inner piston rod 5 is provided with a plurality of axial ribs 53, and a middle portion of the inner piston rod 5 is provided with a The edge 52 makes the inner piston rod 5 less yaw when moving inside the outer piston rod 3; please refer to the second circle, as shown by the second circle, the original original state of the safety injection syringe of the present invention The outer piston rod 3 sinks into the inner bottom of the outer cylinder 1, and the inner piston rod 5 sinks into the inner bottom of the outer piston rod 3 to contact the rubber pad portion 42 of the needle pulling member 4, in particular, the inner piston rod 5 is provided. The elastic protruding rod 51 is protruded from the bottom end of the sliding groove 33 provided by the outer piston rod 3, and is in contact with the inner wall 111 of the outer cylinder 1; as shown in Fig. 3, the user inserts the safety injection syringe of the present invention into the medicine. The outer piston rod 3 of the safety injection syringe is pulled in the liquid tank to extract the liquid medicine until the elastic protruding rod 51 of the inner piston rod 5 moves along the sliding groove 33 to be elastically engaged and positioned at the end capacity of the outer cylinder 1 Room 13; as shown in Figure 4, when the patient begins to inject, the user pushes the outer piston rod 3 while the inner piston form number A0101

Page 8 of 22 M411948 June 17, 100 Press the replacement page

The rod 5 does not move because the elastic projection 51 is caught in the drop 16 of the end chamber 13 of the outer cylinder 1, and the needle member 4 to the front end of the outer piston rod 3 is engaged with the pushing groove 222 at the end of the needle 2. At this time, a closed chamber 34 for accommodating the needle 2 is formed behind the needle member 4 in the outer piston rod 3 (as shown in FIG. 5), and in particular, the perforation 35 of the outer piston rod 3 has escape. The action of the gas to reduce the resistance of the hand pushing the outer piston rod 3; as shown in Figures 6 and 7, when the user presses the outer piston rod 3 continuously, the needle member 4 is on the outer piston rod 3 due to the reaction force. The inside of the tapered inner bore 32 is retracted, in other words, the pull-tab member 4 is retracted from a position where the tightening force f is large to a position where the tightening force f is small, and the pull-tab member 4 is When the needle 2 is pushed by the external atmospheric pressure, that is, equivalent to the suction force of the sealed chamber 34 in the rod body, the needle member 4 and the needle 2 are sucked together by the pushing of the external atmospheric pressure P. The sealed chamber 34 is as shown in Fig. 8. In summary, the various embodiments of the structure of the present creation have not been found in books or public use, and are in line with the requirements of the new patent application, and please ask the Bureau to give a patent, and to pray for it; The above is the technical principle applied immediately by the specific implementation of this creation.

If the functional changes made in accordance with the concept of this creation have not exceeded the spirit of the manual and the drawings, they shall be combined with Chen Ming within the scope of this creation. [Simple description of the drawing] [0005] Fig. 1 is a sectional view showing the original state of the creation structure at the time of shipment. Figure 2: An exploded view of the creative structure. Figure 3: Schematic diagram of the extraction of the drug solution for the creation structure. Figure 4: A schematic diagram of the injection of the creative structure. Figure 5: The outer piston rod of the original structure has been formed into a closed chamber. Form No. A0101 Page 9 of 22 M411948 !-· »- June 17th, 2006 * Nuclear replacement page Intent. Fig. 6 is a schematic view showing the needle-pulling member at the front end of the outer piston rod of the original structure in a relatively large tightening position. Fig. 7 is a schematic view showing the stylus member at the front end of the outer piston rod of the original structure in a relatively small tightening position. Fig. 8 is a schematic view showing the drawing of the needle member at the front end of the outer piston rod of the original structure into the sealed chamber. Figure 9: A conventional structure diagram.

[Main component symbol description] [0006] "This creation" Outer tube 1 Internal 11 Tapered inner hole 12 Ring type pad 14 Drop 16 Metal needle 21 Flange 221 Outer piston rod 3 Piston sleeve 3 01 Inner 31 Chute 33 Perforation 35 Beveled edge 3 61 Fitting taper 41 Inner piston rod 5 Elastic lug 51 Form No. A0101 Body 10 Inner wall 111 End chamber 1 3 Flap 15 Needle 2 Binding seat 22 Pushing groove 222 Rod body 30 Flange 302 Tapered Inner hole 32 Closed chamber 34 Rib 36 Pull pin 4 Pad portion 42 Body 50 Flange 52 Page 395

M411948 June 17, 100 Shuttle replacement page ribs 53 Atmospheric pressure P Tension force f "Practical structure" - 9 Needle 91 Needle 911 Needle seat 912 Engagement 92 Tubular socket 921 Groove 922 Closure ring 923 柩 924 924 connecting piece 925 perforation 926 syringe 93 piston 94 sealing ring 941 stud 942 hook 943 piston handle 944 form number A0101 page 11 / total 22 pages

Claims (1)

M411948 June 17, 100 nuclear replacement page VI, the scope of application for patents: 1. A safety injection syringe retracting the needle structure, comprising: an outer cylinder, is a circular cylinder and has a terminal capacity at the end a needle for the elastic rod of the inner piston rod; a needle comprising a metal needle and a joint, and a push groove is arranged in the joint, and the whole is assembled from the rear of the outer cylinder a front end of the outer cylinder; an outer piston rod having a circular hollow shape and having an axial sliding groove at a periphery between the middle portion and the end portion, and the outer piston rod is set to sink into the outer portion of the outer cylinder, and The front end internally snaps into the pull needle; the pull needle comprises a fitting taper and a rubber pad; wherein the fitting I taper of the puller corresponds to the pushing groove of the needle, and the puller The rubber pad portion is tightly fitted to the inner front end of the outer piston rod; an inner piston rod is connected with a resilient protruding rod at the end thereof, and the elastic protruding rod protrudes from the sliding groove of the outer piston rod to interfere with the inner wall of the outer cylinder. 2 . The structure of the safety syringe retracting needle according to claim 1 , wherein an inner diameter of the end chamber of the outer cylinder is larger than an inner diameter of the outer cylinder body, so that the inner diameter of the end chamber and the body The junction of the inner diameters creates a drop. 3. The safety injection syringe retracting needle according to claim 1, wherein the outer end of the outer piston rod is provided with a push-out hole for fitting the rubber pad portion of the pull needle member, and the push The structure of the safety of the needle retracting needle according to the first aspect of the patent application is as follows: wherein the outer circumference of the outer piston rod is provided with a plurality of axial ribs. The structure of the safety syringe retracting needle according to claim 4, wherein the outer piston rod and the corresponding rib around the sliding groove and the rib corresponding thereto radially penetrate at least one perforation, and the side of the rib around the perforation Each side is set to a beveled edge. 6. According to the scope of claim 1 of the safe injection syringe retracting needle 100203084 Form No. 1010101 Page 12 of 22 1003216252-0 M411948 Correction replacement on June 17, 100 The page structure is provided with a ring-shaped rubber pad between the flange provided at the end of the needle and the inner front end of the outer cylinder, and the ring-shaped rubber pad is tightly fitted to the inner front end of the outer cylinder and the flange of the needle. Patent scope number 1 The safety injection syringe retracts the structure of the needle, wherein the elastic rib of the inner piston rod extends from the end of the piston rod for a short period of time, and then the inner end of the inner piston rod is bent at 90 degrees to extend a section. The structure of the safety syringe retracting needle according to claim 1, wherein the inner circumference of the inner piston rod is provided with a plurality of axial ribs. 9. According to claim 1 or 8 Safety syringe retracting needle The structure is characterized in that a flange is arranged at a middle portion of the inner piston rod so that the inner piston rod is less yawed when moving inside the outer piston rod. 10. The structure of the safety syringe retracting needle according to claim 1, wherein when the injection is started, the outer piston rod is pushed but the inner piston rod is not moved, and the rear of the needle member in the outer piston rod is formed. a closed chamber; when the outer piston rod is continuously pressed, the pull needle is retracted by the reaction force, and when the tension of the pull needle is reduced, the pull needle and the needle are subjected to atmospheric pressure. That is, the suction force equivalent to the vacuum chamber in the rod body is sucked into the closed chamber together. 100203084 Form No. A0101 Page 13 of 22 1003216252-0