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WO2004004808A1 - Injecteur muni d'une structure a autodestruction - Google Patents

Injecteur muni d'une structure a autodestruction Download PDF

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Publication number
WO2004004808A1
WO2004004808A1 PCT/CN2003/000473 CN0300473W WO2004004808A1 WO 2004004808 A1 WO2004004808 A1 WO 2004004808A1 CN 0300473 W CN0300473 W CN 0300473W WO 2004004808 A1 WO2004004808 A1 WO 2004004808A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
syringe
hole
needle bar
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2003/000473
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English (en)
Chinese (zh)
Inventor
Hsien-Ming Hsieh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU2003281247A priority Critical patent/AU2003281247A1/en
Publication of WO2004004808A1 publication Critical patent/WO2004004808A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile

Definitions

  • the present invention relates to a syringe with a self-destructing structure, and more particularly to a syringe for a disposable medical device.
  • Most existing syringes are composed of a syringe, a needle shaft, and an injection needle.
  • the syringe is circular, and the needle is detachably sleeved on the extended needle connector or the needle seat at the bottom of the syringe.
  • the needle seat and the syringe are integrally injection-molded.
  • One end of the needle rod is equipped with a piston, which is used to draw the injection solution into the syringe and inject it into the body through the injection needle.
  • the other end of the needle rod has a handle, and the end of the barrel has an open hand support. And hand rest to inject the medicine in the syringe into the body.
  • the syringe has the following disadvantages when used:
  • the main purpose of the present invention is to provide a syringe with a self-destructing structure, which can destructively treat its parts one by one during use, effectively prevent re-use, and can retract the needle into the syringe to It prevents infection from pathogenic sources and is convenient and reliable to use.
  • the present invention mainly provides a syringe with a self-destructing structure, which includes: a syringe assembly, a needle bar assembly, and a needle seat assembly, wherein the needle
  • the barrel assembly includes a syringe and a needle cap.
  • the syringe has a barrel body. One end of the needle cap is connected to the outside of the bottom of the barrel body. A through hole is provided at the bottom of the barrel body to correspond to the needle cap, and the other end of the barrel body is Figure diagram diagram diagram diagram diagram diagram diagram
  • the needle bar assembly penetrates the opening of the syringe body and is pivotally located in the syringe; and the needle seat assembly is installed in the bottom of the syringe body, the needle seat assembly has a through-medicine channel hole, and the needle seat
  • the component has an injection needle mounting seat at the exit corresponding to the medicinal solution channel hole, the injection needle mounting seat is penetrated through a through hole at the bottom of the syringe barrel body, and there is an engaging self-destructing structure between the needle bar assembly and the needle seat assembly.
  • the self-destructing structure enables the needle bar assembly to be engaged with the needle base assembly, and the needle bar assembly drives the needle base assembly to slide along the inner wall of the syringe barrel.
  • the used needle seat assembly of the used syringe can be retracted into the syringe assembly, that is, the middle of the syringe, to achieve protective self-destruction to prevent it from being used again or hurting the staff.
  • FIG. 1 is an exploded perspective view of the first embodiment of the present invention.
  • FIG. 2 is a three-dimensional combined view of the first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the first embodiment of the present invention.
  • FIG. 5 is a sectional view taken along line C-C in FIG. 3.
  • FIG. 6 is a schematic diagram of the assembly of the syringe assembly of the first embodiment of the utility model with one quarter of the syringe removed.
  • FIG. 7 is a schematic plan view of a needle bar assembly according to the first embodiment of the present invention.
  • 8 is a schematic diagram of the assembly of the needle bar, the needle bar hook and the needle bar piston in the first embodiment of the present invention.
  • FIG. 9 is an assembly diagram of the needle hub assembly according to the first embodiment of the present invention.
  • FIG. 10A is a sectional view of a syringe assembly according to the first embodiment of the present invention.
  • FIG. 10B is a right side view of the syringe assembly according to the first embodiment of the present invention.
  • Fig. 10C is a cross-sectional view taken along A-A of Fig. 10A.
  • FIG. 10D is a C-C cross-sectional view of FIG. 10A.
  • FIG. 11A is a schematic plan view of a needle bar according to the first embodiment of the present invention.
  • FIG. 11B is a right side view of the needle bar according to the first embodiment of the present invention.
  • FIG. 12A is a schematic plan view of a needle bar hook according to the first embodiment of the present invention.
  • FIG. 12B is a top view of the needle bar hook according to the first embodiment of the present invention.
  • Fig. 12C is a sectional view taken along the line C-C of Fig. 12B.
  • FIG. 12D is a sectional view taken along the line B-B in Fig. 12B.
  • FIG. 13A is a top view of the needle rod piston according to the first embodiment of the present invention.
  • Fig. 13B is a cross-sectional view taken along A-A of Fig. 13A.
  • FIG. 14A is a schematic plan view of a needle hub according to the first embodiment of the present invention.
  • FIG. 14B is a sectional view of the needle hub of the first embodiment of the present invention.
  • Fig. 14C is a sectional view taken along the line B-B of Fig. 14B.
  • Fig. 15 is a longitudinal sectional view of the needle seat piston according to the first embodiment of the present invention.
  • FIG. 16 is a sectional view of a second embodiment of the present invention.
  • FIG. 17A is a schematic plan view of a needle hub according to a second embodiment of the present invention.
  • Fig. 17B is a cross-sectional view taken along A-A of Fig. 17A.
  • FIG. 18A is a sectional view of a third embodiment of the needle hub of the present invention.
  • Fig. 18B is a sectional view taken along the line B-B in Fig. 18A.
  • FIG. 19 is an assembly schematic diagram of the needle seat structure of the third embodiment of the needle seat of the present invention applied to the second embodiment of the invention. Component symbol
  • Syringe 110 Syringe body 111 Through hole 112 Mounting hole 112 'Bottom 113 Open 114 Hand rest
  • a syringe with a self-destructing structure which is different from a general syringe, is reflected.
  • the utility model is a syringe with a self-destructing structure, which includes a syringe assembly 100, a needle bar assembly 200 and a needle seat assembly 300.
  • the syringe assembly 100 includes at least a syringe 110 and a needle cap 120.
  • the syringe 110 has a syringe body 111, and the needle cap 120 is connected to the outer side of the bottom 113 of the syringe body 111.
  • the bottom 113 of the body 111 is provided with a through hole 112 corresponding to the needle cap 120, and the other end of the syringe body 111 is an opening 114; the main part of the needle bar assembly 200 is sleeved in the syringe assembly 100, and is passed through the syringe body
  • the opening 114 of 111 is pivotally arranged in the syringe 110, forming a piston structure, similar to the existing syringe, and the two are closely fitted to each other so that the medicinal solution is sucked into the syringe 110 and injected outward.
  • the cross-sectional shape of the inner wall of the syringe body 111 is a uniform ellipse or an oval-like shape composed of four arcs or other inner walls are polygonal.
  • the inner wall shape of the syringe body 111 The best choice is a symmetrical shape structure around the central axis; the needle seat assembly 300 (this structure is completely different from the existing syringe, the existing syringe's needle seat is directly integrated with the syringe injection molding) is installed on the front and bottom 113 of the syringe body 111 Inside; the needle seat assembly 300 has a medicinal solution passage hole 311 penetrating therethrough,
  • the needle base assembly 300 has an injection needle mounting base 312 at the exit corresponding to the medicinal liquid channel hole 311, and the injection needle mounting base 312 is penetrated through the through hole 112 on the bottom 113 wall of the syringe body 111; the injection needle mounting base 312 is at the time of assembly
  • the above-mentioned needle cap 120 is connected to the outer wall of the bottom 113 of the syringe body 111 and corresponds to the through hole 112.
  • the needle bar assembly 200 and the needle seat assembly 300 have an engaging self-destructing structure.
  • the engaging self-destructing structure is that the needle bar assembly 200 and the needle seat assembly 300 are engaged, and the needle bar assembly 200 drives the needle seat assembly 300 along the needle.
  • the inner wall of the barrel 111 slides, and the self-destructing structure engages the two together, and the needle seat assembly 300 can slide along the inner wall of the barrel 111 with the needle bar assembly 200.
  • the self-destructing structure can be used to force the used Note 3
  • the syringe base assembly 300 of the injector is retracted into the syringe assembly 100, that is, the middle of the syringe, to achieve the protective self-destructive purpose, so as to prevent being used again or stabbing the staff.
  • All structures that snap together and drive the needle seat assembly 300 to slide For example, a fitting structure between a T-shaped hook protruding from the front end surface of the needle bar assembly 200 and a hole opened on the needle base assembly 300 with an enlarged bottom hole and matching the ⁇ -shaped hook.
  • the front end of the needle bar assembly 200 is pivoted and extends with a hook portion 221, and the needle base assembly
  • the receiving cavity portion 315 is provided in 300.
  • the engaging self-destructing structure is that the hook portion 221 is inserted into the receiving cavity portion 315 and rotated to a certain angle to be engaged with the receiving cavity portion 315.
  • the hook portion 221 includes a head portion 2211 and a neck portion perpendicular to the head portion 2211.
  • the cross-sectional area of the head 2211 is larger than the cross-sectional area of the neck 2212; please refer to FIG. 5 at the same time, the cavity portion 315 is formed by the insertion hole 3151 corresponding to the head 2211 of the hook portion 221 and the bottom of the insertion hole 3151
  • the expansion hole 3152 is configured, and the expansion hole 3152 is the head of the hook portion 221
  • the depth of the above-mentioned insertion hole 3151 is the same as or slightly shorter than the length of the neck portion 2212 of the hook portion 221, and the height dimension of the expansion hole 3152 is the same as or slightly larger than the thickness dimension of the head portion 2211 of the hook portion 221 to ensure a compact fit. In order to reduce the carryover of the injection solution during use.
  • the needle bar assembly 200 includes a needle bar 210, a needle bar hook 220, and a needle bar piston 230; the main body of the needle bar hook 220 is embedded in the needle bar piston 230, and the needle bar piston 230 and
  • the above-mentioned inner wall of the syringe body 111 is matched to ensure a good sealing performance between the needle rod piston 230 and the inner wall of the syringe body 111 to prevent the drug solution from leaking out. Because the inner wall of the syringe body 111 is oval or similar The ellipse and other shapes can ensure that the needle bar piston 230 can move left and right along its axis, as shown in the arrow direction of FIG. 6, and cannot rotate around the axis.
  • the front part of the needle bar 210 is connected with the insert through a strong fitting connection structure.
  • the rear part of the main body of the needle bar hook 220 installed in the needle bar piston 230 is connected, and the needle bar 210 drives the needle bar hook 220 to perform a sealed rotation.
  • the strong connection structure can ensure that the needle bar hook 220 can Rotate with the needle bar 210.
  • the main part of the "embedded" pan pointer rod hook 220 is embedded in the needle rod piston 230, so that the needle rod hook 220 and the needle rod piston 230 are tightly coupled together (see this embodiment); the "set” pan pointer The middle of the rod hook 220 passes through the needle rod piston 230, and both ends of the rod hook 220 hold the needle rod piston 230 therein and join the needle rod hook 220 with the needle rod piston 230 (this structure has been disclosed in the applicant's previous patent) .
  • the above-mentioned "T" hook which is pivoted and extends the front end surface of the needle bar assembly 200, is capable of rotating the hook portion 221 and the needle bar hook 220 integrally. .
  • the needle base assembly 300 includes a needle base 310 and a needle base piston 320; the needle base 310 is tightly fitted in the needle base piston 320, and the needle base piston 320 and the above-mentioned syringe body 111 Anastomosis of the wall (see Figure 5) to ensure a good sealing performance between the needle seat piston 320 and the inner wall of the syringe body 111 to prevent the drug solution from leaking out, and because the inner wall of the syringe body 111 is oval or similarly oval
  • the shape and the like can ensure that the needle seat assembly 300 can only move left and right along its axis direction, and cannot rotate around the axis, as shown in the arrow direction of FIG.
  • the above-mentioned cavity portion 315 is located inside the needle seat 310, and the cavity The part 315 satisfies the structural requirements that the hook part 221 at the front of the needle bar hook 220 described above is inserted and rotated at an angle of less than 90 degrees and snapped together.
  • the self-destructing structure formed by the hook portion 221 and the cavity portion 315 can ensure that the needle bar hook 220 and the needle base 310 are locked together. When the needle bar 210 is pulled out with force, the needle base 310 and the needle base can be ensured.
  • the piston 320 is moved outward (in the direction of the opening 114 of the syringe body 111), so that the needle on the needle base 310 is retracted into the syringe 110, thereby achieving self-destructing and protective purposes.
  • the syringe assembly 100 includes the above-mentioned syringe 110, the syringe 110 includes the above-mentioned syringe body 111, and the bottom 113 of the syringe body 111 has the above-mentioned through hole 112;
  • the syringe body 111 is a cylindrical shape with a uniform inner wall cross-section, having the above-mentioned bottom 113 and the above-mentioned opening 114 at the rear end, and the inner wall cross-sectional shape of the syringe body 111 is oval or quasi-ellipse (four-segment arc) or other polygonal inner walls.
  • the cylindrical shape is oval as shown in FIG.
  • the syringe assembly 100 also includes the above-mentioned needle cap 120.
  • the syringe 110 and the needle cap 120 are connected by a weak and fragile structure 130.
  • the needle cap 120 is mounted on the outer wall of the bottom 113 of the syringe body 111 through a weak and easily destructible structure 130, and corresponds to the above-mentioned through-hole 112 through which the injection needle mounting base 312 passes during assembly; the needle cap 120 is a hollow cylindrical shape, and The circular long hole 121 capable of accommodating the injection needle mounting seat 312 and the injection needle is provided on the rear wall with reinforcing ribs 122. As shown in FIG. 10C, there are four reinforcing ribs 122; as shown in FIG. 10D, the easy The damage structure 130 is a plurality of smaller connecting posts 131 connected to the needle cap 120 and the bottom 113 of the syringe 110.
  • the needle cap When in use, the needle cap can be twisted off along the easily-breakable structure 130, and four connecting posts 131 are evenly distributed. . As shown in FIG. 10A, a ring-shaped protrusion 116 along the inner wall of the syringe body 111 is provided at the open end 114 of the syringe body 111 to prevent the needle bar assembly 200 from accidentally sliding out.
  • the needle bar 210 in the needle bar assembly 200 includes at least a middle needle bar body 211, a rear handle 212, and a front connector 213.
  • the handle 212 is approximately oval The shape is convenient for injection, and its area is larger than the cross-sectional area of the syringe body 111. It is located at the rear end of the needle shaft 211, and its handle 212 is located outside the syringe body 111 after assembly.
  • the cross section of the needle bar body 211 is a “ten” shape, which can be gradually reduced as it approaches the handle 212.
  • the foldable structure 214 is a "V" -shaped foldable structure 214, which is opened on each of the "ten” -shaped structures, and other foldable structures can also be used. Structure, such as through holes or other holes in each of the "ten" -shaped needle bar body 211 structure Shape notch.
  • the connector 213 at the front of the needle bar 210 is connected to the needle bar body 211 by a circular plate 215 transverse to the front end of the needle bar body 211; the connector 213 is a "T" shaped connector 213 with a ladder-shaped head, which is convenient for strong connection .
  • the shape of the piston seat 216 is the same as the shape of the syringe body 111 there, as shown in FIG. 11B.
  • the connector 213 at the front of the needle bar 210 is located at the center of the circular plate 215.
  • the respective point connection structures 217 of the two piston seats 216 are respectively located at the edges of the circular plates 215 opposite to the two piston seats 216.
  • the piston seats 216 are located at the two edges of the needle bar 210, and
  • the inner wall of the syringe body 111 has a certain distance, which is convenient for use (such as when pushing and pulling the needle bar 210) without damaging its structure.
  • This point connection structure 217 constitutes a fragile point on the piston seat 216.
  • the handle 212 has symmetrical wings at both ends, which is convenient to use.
  • the needle bar hook 220 in the needle bar assembly 200 has a rear cylindrical body 222 in addition to the above-mentioned hook portion 221, and the rear portion is cylindrical to facilitate its rotation.
  • the neck portion 2212 of the hook portion 221 is connected to the front end surface of the cylinder 222 through a cylindrical connection portion 2213.
  • the neck portion 2212 of the hook portion 221 is cylindrical, and the connection portion 2213 is a square column.
  • the cylinder is inscribed in a square column.
  • a cavity 223 is provided in the rear of the cylinder 222, and the cavity 223 is matched with the connector 21.3 of the above-mentioned needle bar 210.
  • the cavity 223 is formed by a hole 2231 on the central axis and a through hole perpendicular to the hole.
  • the hole 2232 is formed by a hole 2232 which is a through hole and penetrates the entire cylinder 222, which is convenient for processing. In fact, blind holes can also be used where processing permits.
  • the strong fitting connection structure between the front part of the needle bar 210 and the rear part of the main body of the needle bar hook 220 is that the connector 213 at the front of the needle bar 210 is strongly inserted into the needle bar hook 220.
  • the neck size of the "T" connector 213 is slightly smaller than the outer size of the hole 2231 in the cavity 223, and the size of the hole 2232 in the cavity 223 can accommodate the "T" connection
  • the head of the "T" type connector 213 passes through the hole 2231 and is received in the hole 2232.
  • the neck of the "T” type connector is in the hole 2231 and is The hole 2231 is closely fitted to form a whole.
  • the needle rod piston 230 is a columnar body that matches the inner wall of the syringe body 111, and its outer contour matches the inner wall of the syringe 110, that is, its cross-sectional shape is Oval or quasi-ellipse (formed by four arcs) with cavity 231 in it,
  • the cavity 231 can receive a cylindrical body 222 at the rear of the needle bar hook 220.
  • the cavity 231 is consistent with the shape of the cylindrical body 222 at the rear of the needle bar hook 220, and is also a cylindrical shape. Therefore, the depth of the cavity 231 is the same as the length of the cylindrical body 222 of the needle bar hook 220, and the cavity is the same.
  • the radius of 231 may be slightly larger than the radius of the cylinder 222 to ensure that the above-mentioned cylinder 222 can rotate in the cavity 231; in order to better ensure its overall sealing performance, the size of the cavity 231 may also be the same as the above-mentioned cylinder 222 Or slightly smaller, because the needle bar piston 230 is made of thermoplastic elastic material during processing, it will not affect the rotation of the needle bar hook 220 therein.
  • a through hole 233 is provided at the bottom of the front end of the cavity 231, and the through hole 233 corresponds to the square pillar-shaped connecting portion 2213 in the needle bar hook 220. The depth of the through hole 233 is consistent with the height of the square pillar-shaped connecting portion 2213.
  • the needle bar hook 220 is first inserted into the needle bar piston 230 along the axis and the front hook extends out of the front of the piston, and then the needle bar 210 is strongly inserted into the assembled
  • the needle bar hook 220 in the needle bar piston 230 constitutes a needle bar assembly 200.
  • a circular groove 224 is formed on the front surface of the cylinder 222, and a circular and concave semicircular arc groove 225 is provided on the rear surface; please refer to FIG. 13A,
  • the cavity 231 has a ring-shaped protrusion 232 in the front part and a half-arc ring-shaped protrusion 235 in the rear part.
  • the annular protrusion 232 corresponds to and coincides with the annular groove 224
  • the protrusion 235 corresponds to and coincides with the concave semicircular arc groove 225.
  • the anastomosis structure can prevent the needle bar hook 220 from disengaging from the needle bar piston 230, and plays a sealing and positioning role when the needle bar hook 220 is rotated.
  • the outer contour of the above-mentioned needle bar piston 230 matches the inner wall of the syringe body 111, and the sealing performance between the needle bar piston 230 and the syringe body 111 is guaranteed. It is convenient for the needle bar piston 230 to be slidably and tightly installed in the syringe body 111.
  • the medicine liquid can be sucked into the syringe body 111 through the medicine liquid passage hole 311. Inside or outside the syringe body 111.
  • the needle bar hook 220 is embedded in the cavity 231 of the needle bar piston 230 and its front hook portion 221 protrudes from the front surface of the needle bar piston 230. To ensure that the needle bar hook 220 cooperates with the needle bar piston 230, the needle is extended The connecting portion 2213 of the hook portion 221 on the front end surface of the rod piston 230 is tightly fitted with the needle rod piston 230 to prevent the penetration of the medicinal solution.
  • the needle rod piston 230 is made of a non-toxic elastic material, such as a rubber material, and the elastic material
  • the needle bar hook 220 can also be rotated in the needle bar piston 230.
  • the front of the needle bar 210 is forcibly mounted (inserted).
  • the rear of the needle bar hook 220 inside the needle bar piston 230 allows the needle bar hook 220 to follow the needle bar when the needle bar 210 is rotated. 210—turn.
  • the needle base 310 in addition to the medicinal solution passage hole 3 ⁇ and the injection needle mount 312 described above, the needle base 310 also has a rear cylinder 313 (such as an oval cylinder) similar to the syringe body 111. ) And the front plug 314; the plug 314 is located on the central axis of the needle base 310 and is used for assembling between the needle base 310 and the through hole 112 of the syringe body 111.
  • the needle base 310 and the plug 314 are the connecting parts of the injection needle mounting base 312 and the rear post 313 of the needle base 310, and the plug 314 and the injection needle mounting base 312 are located on the central axis, that is, the needle base assembly
  • the medicinal solution passage hole 311 in 300 is located on the central axis of the needle base assembly 300, that is, the central axis of the plug 314. Therefore, the through hole 112 through which the above-mentioned injection needle mounting base 312 passes also serves as the assembly hole of the needle base 310. The two are combined into one (see Figure 3 and Figure 10A).
  • the plug 314 is consistent with the through hole 112 (also serving as a mounting hole) of the bottom 113 of the syringe body 111, and its shape can be conical.
  • the plug 314 is used to assemble the needle seat assembly 300 on the bottom 113 of the syringe body 111 and Just fit into the through hole 112 of the bottom 113 of the syringe body 111 (see the description of the syringe assembly 100 above). It extends outward to form an injection needle mounting base 312, which facilitates the assembly of the injection needle, and can also fix the injection needle to it during production.
  • the above-mentioned cavity portion 315 corresponds to the above-mentioned hook portion 221.
  • the cavity portion 315 is composed of an insertion hole 3151 corresponding to the head of the hook portion 221 and an expansion hole 3152 at the bottom of the insertion hole 3151 (see FIG. 14C). 0 expansion
  • the hole 3152 can rotate the head of the hook portion 221 by an angle less than 90 degrees.
  • the expansion hole 3152 penetrates the entire needle base 310 along the radial direction, that is, the cylinder 313, and is perpendicular to the insertion hole 3151.
  • the insertion hole 3151 is just to enable the hook to be inserted.
  • the axial projection shape of the head 2211 of the hook portion 221 is the same, and it is also an approximately square (rectangular columnar hole).
  • the expansion hole 3152 allows the hook portion 221 to pass in one direction and move in a circular motion. Do not allow the hook to pass after rotating less than 90 degrees.
  • a pair of clips 316 are provided on the top edge of the expansion hole 3152 corresponding to the hook portion 221. After the hook portion 221 is inserted and rotated about 90 degrees in the direction of the arrow (clockwise), it is stopped by the front wall of the expansion hole 3152 and cannot continue to rotate. At the same time, due to the elastic effect of the clip 316, it can be rotated during clockwise rotation. The hook portion 221 is passed.
  • the medicinal solution passage hole 311 in the above-mentioned needle base assembly 300 penetrates the entire needle base assembly 300 and is located on the central axis of the needle base assembly 300.
  • the needle seat piston 320 is a hollow cylindrical body, and its outer contour shape is consistent with the shape of the inner wall of the syringe body 111.
  • the needle seat piston 320 has a through hole 322, and the two ends of the outer wall are respectively provided with half-arc annular protrusions 321.
  • the semi-circular arc-shaped protrusion 321 is in close contact with the inner wall of the syringe body 111 during assembly to ensure its sealing performance.
  • An annular groove 317 is provided on the surface of the cylinder 313, and the groove 317 is used for clamping the needle seat piston 320.
  • the outer dimension of the annular groove 317 should be larger than the size of the above-mentioned through hole 322, and the two are tightly combined after assembly. Therefore, the through hole 322 can just ensure that the main body 313 of the needle base 310 passes and meets the space required for its assembly.
  • the frictional resistance between 230 and the inner wall of the syringe body 111 is provided with a set of annular protrusions 234 on the front and rear portions of the outer periphery of the needle rod piston 230 that fit the inner wall of the syringe body 111, which is convenient to use.
  • the needle seat piston 320 is first sleeved on the needle seat 310 to form a needle seat assembly 300 (as shown in FIG. 9), and then opened from the rear end of the syringe body 111.
  • the needle seat assembly 300 is assembled to the bottom 113 of the syringe body 111 in a correct orientation.
  • the injection needle mounting seat 312 in the needle seat assembly 300 extends from the through hole 112 (also serving as an assembly hole) of the syringe body 111.
  • its plug 314 is just caught in its through hole 112 (also serves as an assembly hole).
  • the needle bar hook 220 is embedded in the needle bar piston 230 (see FIG. 8). At this time, the hook portion 221 at the front of the needle bar hook 220 extends from the needle bar piston 230, and then the needle bar 210 is forcibly mounted on the needle bar.
  • the piston 230 constitutes a needle bar assembly 200 (see FIG. 8).
  • the needle bar assembly 200 is assembled into the syringe body 111 from the rear opening 114 of the syringe body 111 in the correct orientation.
  • the needle bar hook 220 in the needle bar assembly 200 is just right Align the cavity portion 315 on the needle base 310.
  • the needle cap 120 In use, firstly separate the needle cap 120 along its weak and fragile structure 130 connected to the syringe body 111 (a destructive permanent separation) to expose the injection needle mounting seat 312 in the needle seat assembly 300.
  • the injection needle is installed, and the injection needle can be injection-molded on the mounting seat 312 during processing.
  • injection is performed.
  • the hook portion 221 at the front of the needle bar hook 220 is pushed into the cavity portion 315 of the needle seat piston 320.
  • the approximately rectangular parallelepiped head 2211 enters the bottom of the insertion hole 3151 of the needle seat 310, and the needle bar 210 is rotated clockwise.
  • the angle (less than 90 degrees) is about 90 degrees in this embodiment.
  • the hook portion 221 is caught by the clip 316 in the cavity portion 315, so that the hook portion 221 must not move backward to realize the self-destruct function.
  • the needle bar assembly 200 and the needle seat assembly 300 are engaged together, and the needle bar 210 is pulled out with force.
  • the needle seat assembly 300 will follow the needle bar 210 to the center of the syringe 110. Move the needle holder 310 away from the bottom 113 of the syringe body 111 to prevent the needle from stabbing a medical staff or staff after the injection.
  • the piston seats 216 on both sides of the needle bar 210 are received by the syringe.
  • the limit of 110 will be broken along its point connection structure 217 to prevent it from being used again. Then twist the needle bar 210 with force to reduce the medical waste and achieve self-destructive protection.
  • the structure disclosed in the embodiment is particularly suitable for an intravenous syringe.
  • FIG. 16 which includes a syringe assembly 100, a needle bar assembly 200, and a needle seat assembly 300.
  • the syringe assembly 100 includes at least a syringe 110 having a syringe body 111, and a through hole 112 and a mounting hole 112 'at the bottom 113 of the syringe body 111, respectively.
  • the needle bar assembly 200 also includes a needle bar 210, a needle bar hook 220, and
  • the needle bar piston 230 has the same assembly structure as the first embodiment, and a hook portion 221 protrudes from the front end surface of the needle bar piston 230.
  • the needle base assembly 300 also includes a needle base 310 and a needle base piston 320.
  • the rear portion of the seat 310 also has a hook receiving cavity portion 315.
  • the syringe assembly 100 also includes a needle cap 120 and a weak and fragile structure 130 connected to the syringe. The following description focuses on a structure different from the first embodiment.
  • the plug 314 at the front of the needle base 310 is located on the central axis of the needle base 310 (same as the first embodiment) to ensure the accuracy of assembly and the impact of squeezing. Is used for assembling between the needle base 310 and the mounting hole 112 ′ of the bottom 113 of the syringe body 111; and the through-medicine channel hole 311 is offset from the central axis of the needle base assembly 300, that is, it is offset from the plug 314 and the drug channel hole
  • the injection needle mount 312 ′ at 311 passes through the through hole 112 of the bottom 113 of the syringe body 111.
  • FIGS. 18A and 18B are structural diagrams of another needle base 310 suitable for the first embodiment.
  • the needle base 310 also has a medicinal fluid passage hole 311, and includes an injection needle mounting base 312 with a plug 314 and a rear cylinder 313 (such as an oval cylinder) similar to the syringe body 111; the plug 314 is used for the needle Assembly between the base 310 and the syringe body 111.
  • the cavity portion 315 is also composed of an insertion hole 3151 and an expansion hole 3152.
  • the insertion hole 3151 is located at the central axis of the front portion of the cylinder 313.
  • the mounting hole 3152 ⁇ is a circular hole whose diameter is the same as the diameter of the circumscribed circle of the above-mentioned expansion hole 3152.
  • the mounting hole 3152 ⁇ is convenient for reasonable processing of the cavity portion 315; the injection needle mounting seat 312 can be passed through a mounting seat cover 312 " Installed in the mounting hole 3152 ⁇ , its mounting seat cover 312 "is close to the bottom of the expansion hole 3152, and can be fixed together after assembly to form a whole.
  • FIG. 19 in combination with the second embodiment and the eighteenth FIGS. 18A and 18B, the figure shows an assembly diagram of the needle seat structure applied in the second embodiment, and the structure and diagram of the cavity portion 315 thereof The structures reacted by 18A and 18 B are the same.
  • the plug 314 at the bottom of the needle base 310 is located on the central axis of the needle base 310 and is assembled in the mounting hole 112 ′ (see FIG.
  • the cavity portion 315 is also composed of an insertion hole 3151 and an expansion hole 3152.
  • the insertion hole 3151 is located at the central axis of the rear portion of the cylinder 313.
  • the mounting hole 3152 is a circular hole, and the diameter of The opening hole 3152 has the same diameter of the circumscribed circle, and the mounting hole 3152 ⁇ is convenient for reasonable processing of the cavity portion 315.
  • the plug 314 can be installed in the mounting hole 3152 ⁇ through the plug sleeve 314 ", and the plug sleeve 314" abuts the bottom of the expansion hole 3152 After installation, they can be fixed together to form a whole.
  • the utility model provides a syringe with a self-destructing structure, which can destructively treat its components one by one during use, effectively prevent re-use, and can retract the needle into the syringe to prevent infection from the source. Easy to use and reliable.
  • the above descriptions are merely detailed descriptions and drawings of specific embodiments of the present utility model, and are not intended to limit the present utility model and its features. Those who are familiar with this technical field, follow the spirit of the present utility model, etc. All effective modifications or changes should be included in the patent scope of this application.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Environmental & Geological Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne un instrument médical et notamment un injecteur muni d'une structure à autodestruction. L'injecteur comprend un ensemble de seringue (100), un ensemble de tige d'aiguille (200) et un ensemble de socle d'aiguille (300). L'ensemble de seringue (100) comprend une seringue (110) et un capuchon pour aiguille (120). La seringue est constituée d'un boîtier de seringue (111). Une extrémité du capuchon pour aiguille (120) est connectée au fond du boîtier de seringue (111). Un trou traversant (112) se trouve au fond du boîtier de seringue (111). L'autre extrémité du boîtier de seringue (111) reste ouverte. L'ensemble de tige d'aiguille (200) passe à travers l'extrémité ouverte (114) et peut coulisser à l'intérieur du boîtier de seringue (111). L'ensemble de socle d'aiguille (300) est disposé dans la partie de fond du boîtier de seringue (111). Un trou traversant (311) pour médicaments est fait à l'intérieur à l'intérieur de l'ensemble de socle d'aiguille (300). Un support (310) pour aiguille est aménagé sur l'ensemble de socle d'aiguille (300); il passe à travers le trou traversant (112) du côté inférieur du boîtier de seringue (111). Une structure d'autodestruction est disposée entre l'ensemble de tige d'aiguille (200) et l'ensemble de socle d'aiguille (300). L'ensemble de tige d'aiguille (200) est connecté à l'ensemble de socle d'aiguille (300), de manière à permettre à l'ensemble de tige d'aiguille (200) de coulisser le long du côté intérieur du boîtier de seringue (11) avec l'ensemble de socle d'aiguille (300). Selon l'invention, l'injecteur s'autodétruit après l'usage, ce qui réduit les risques de propagations de maladies.
PCT/CN2003/000473 2002-07-02 2003-06-18 Injecteur muni d'une structure a autodestruction Ceased WO2004004808A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003281247A AU2003281247A1 (en) 2002-07-02 2003-06-18 Injector with self-destruction structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN02238082U CN2536248Y (zh) 2002-07-02 2002-07-02 具有自毁结构的注射器
CN02238082.5 2002-07-02

Publications (1)

Publication Number Publication Date
WO2004004808A1 true WO2004004808A1 (fr) 2004-01-15

Family

ID=4780133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2003/000473 Ceased WO2004004808A1 (fr) 2002-07-02 2003-06-18 Injecteur muni d'une structure a autodestruction

Country Status (3)

Country Link
CN (1) CN2536248Y (fr)
AU (1) AU2003281247A1 (fr)
WO (1) WO2004004808A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413550C (zh) * 2006-03-17 2008-08-27 李文勇 一次性自毁式安全注射器
US7530966B2 (en) 2003-02-27 2009-05-12 B. Braun Melsungen Ag Safety syringes
CN102526847A (zh) * 2011-12-28 2012-07-04 徐雪花 一种安全自毁式注射器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101711902B (zh) * 2009-09-10 2012-10-03 莫山仁 一次性自毁式注射器
CN101829383A (zh) * 2010-05-11 2010-09-15 李少君 异形注射器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5769822A (en) * 1996-09-13 1998-06-23 Mcgary; R. Kern Non-reusable retractable safety syringe
CN2434000Y (zh) * 2000-07-25 2001-06-13 李赛玲 一种新型注射器
CN2453938Y (zh) * 2000-11-06 2001-10-17 李赛玲 一种带自毁装置的新型注射器
CN2528458Y (zh) * 2001-12-29 2003-01-01 李赛玲 带自毁装置的注射器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5769822A (en) * 1996-09-13 1998-06-23 Mcgary; R. Kern Non-reusable retractable safety syringe
CN2434000Y (zh) * 2000-07-25 2001-06-13 李赛玲 一种新型注射器
CN2453938Y (zh) * 2000-11-06 2001-10-17 李赛玲 一种带自毁装置的新型注射器
CN2528458Y (zh) * 2001-12-29 2003-01-01 李赛玲 带自毁装置的注射器

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7530966B2 (en) 2003-02-27 2009-05-12 B. Braun Melsungen Ag Safety syringes
US8419682B2 (en) 2003-02-27 2013-04-16 B. Braun Melsungen Ag Safety syringes
US8758296B2 (en) 2003-02-27 2014-06-24 B. Braun Melsungen Ag Safety syringes
CN100413550C (zh) * 2006-03-17 2008-08-27 李文勇 一次性自毁式安全注射器
CN102526847A (zh) * 2011-12-28 2012-07-04 徐雪花 一种安全自毁式注射器

Also Published As

Publication number Publication date
AU2003281247A1 (en) 2004-01-23
CN2536248Y (zh) 2003-02-19

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