CN111012978A - Remaining needle with shielding needle eccentric blocking piece - Google Patents
Remaining needle with shielding needle eccentric blocking piece Download PDFInfo
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- CN111012978A CN111012978A CN202010072381.XA CN202010072381A CN111012978A CN 111012978 A CN111012978 A CN 111012978A CN 202010072381 A CN202010072381 A CN 202010072381A CN 111012978 A CN111012978 A CN 111012978A
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- Prior art keywords
- needle
- eccentric
- hole
- shield
- cavity
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Classifications
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- 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- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
- A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
-
- 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
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- 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
- A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
-
- 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
- A61M2005/3206—Needle or needle hub disconnecting devices forming part of or being attached to the hub or syringe body
-
- 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
- A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
- A61M2005/3223—Means impeding or disabling repositioning of used needles at the syringe nozzle
-
- 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
- A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
- A61M2005/3223—Means impeding or disabling repositioning of used needles at the syringe nozzle
- A61M2005/3224—Means to disalign the needle tip and syringe nozzle
Abstract
An indwelling needle with an eccentric barrier of a shield needle, comprising: the needle protecting sleeve is provided with a cavity in the front part, a front end port on the front end surface and a needle through hole in the rear part; the eccentric blocking piece is arranged in the cavity of the needle protecting sleeve and is provided with an eccentric hole and a plurality of blind holes; the spring clamping piece comprises a front baffle plate part, a rear baffle plate part, a connecting part and an elastic cantilever part, and the elastic cantilever part drives the eccentric baffle plate to move; a needle seat; the needle tube penetrates through the spring clamping piece, the eccentric blocking piece and the needle protecting sleeve, the rear end of the needle tube is fixed on the needle base, and an annular bulge is arranged at the position close to the needle point; a catheter hub assembly. The needle base is pulled backwards to drive the needle tube to retreat, when the needle point of the needle tube retreats from the eccentric hole of the eccentric blocking piece, self-destruction is realized, at the moment, the elastic cantilever part of the spring clamping piece drives the eccentric blocking piece to block the needle through hole of the needle protecting sleeve, the annular bulge of the needle tube is matched with the stop needle hole on the rear blocking plate part of the spring clamping piece to axially and backwards limit the needle tube, and the needle point is shielded in the needle protecting sleeve, so that the safety of a product is improved.
Description
Technical Field
The invention belongs to the technical field of remaining needles, and particularly relates to a remaining needle with an eccentric blocking piece of a shielding needle.
Background
The existing partial indwelling needle has the defects that after venipuncture, a needle tube is pulled out, and the needle tip of the used needle tube is exposed outside, so that medical personnel or other people are easily stabbed when the indwelling needle tube is cleaned and destroyed, and cross infection is caused. And a needle tube retraction mechanism is designed on part of the remaining needle, but the structure of the needle tube retraction mechanism is not reliable enough, the needle tip of the needle tube has the possibility of extending out again, and potential safety hazards exist.
Disclosure of Invention
The invention provides an indwelling needle with an eccentric blocking piece of a shielding needle, aiming at the problems.
The purpose of the invention can be realized by the following technical scheme:
an indwelling needle with an eccentric barrier of a shield needle, comprising:
the needle protecting sleeve is internally provided with a cavity in the front part, a mandril guide hole communicated with the cavity is arranged on the lower side of the side wall of the needle protecting sleeve, the front end surface of the needle protecting sleeve is provided with a front port communicated with the cavity, and a needle through hole which is communicated along the axis is arranged in the rear part of the needle protecting sleeve;
the eccentric blocking pieces are arranged in the cavity of the needle protection sleeve and are arranged along the radial surface, more than 1 piece of the eccentric blocking pieces is arranged, eccentric holes are formed in the eccentric blocking pieces, a plurality of blind holes are formed in the rear end surface of the eccentric blocking pieces and are circumferentially arranged on the peripheral sides of the eccentric holes, and more than 2 supporting points are arranged on the outer contour of the blind holes;
the spring clamping piece comprises a front baffle plate part, a rear baffle plate part, a connecting part and an elastic cantilever part, wherein the front baffle plate part is arranged at the front part of a cavity of the needle protection sleeve and axially limits the eccentric baffle plate forwards;
a needle stand connected to the rear side of the needle protecting cover;
the rear end of the needle tube extends into the front port of the needle protection sleeve, and the needle tube sequentially penetrates through the needle hole of the spring clamping piece, the eccentric hole of the eccentric blocking piece, the front section of the needle through hole of the needle protection sleeve, the stop needle hole of the spring clamping piece and the rear section of the needle through hole of the needle protection sleeve along the axial direction and then is fixed on the needle base, the front end of the needle tube is a needle point and is exposed after penetrating through the catheter base assembly, and a slotted hole and an annular bulge which are arranged in the front and at the back are arranged at the position; and
the catheter seat assembly comprises a catheter seat, a metal wedge, a catheter and an isolation plug, wherein the rear part of the catheter seat is arranged in the front end of the needle protection sleeve, and the side wall of the rear part of the catheter seat is provided with a bayonet matched with a buckle of the spring clamping piece;
the outer diameter of the annular bulge of the needle tube is larger than the stop needle hole of the spring clamping piece and smaller than the needle through hole of the needle protecting sleeve, the eccentric hole of the eccentric blocking piece, the needle hole of the spring clamping piece and the catheter inner hole of the catheter seat component;
when the needle base is pulled backwards, the remaining needle is triggered to perform self-destruction, the needle base drives the needle tube to retreat along the axial direction, when the needle point of the needle tube retreats from the eccentric hole of the eccentric separation blade, the eccentric separation blade without the support of the needle tube freely moves in the cavity of the needle protection sleeve until reaching a balanced state, the eccentric separation blade at the moment is in contact with the inner wall of the cavity of the needle protection sleeve through more than 2 support points of the outer contour to keep balance, the solid surface of the eccentric separation blade completely blocks the front end of the front section of the needle through hole of the needle protection sleeve, the blind hole of the eccentric separation blade prevents the needle point of the needle tube from entering the eccentric hole, and when the needle point of the needle tube retreats continuously, the annular bulge of the needle tube is blocked by the stop needle hole; the elastic cantilever part of the spring clamping piece recovers deformation, a buckle at the front end of the elastic cantilever part is disengaged from a bayonet of a catheter seat of the catheter seat assembly, and the catheter seat assembly can be taken down from the front end of the needle protection sleeve.
Furthermore, the front part of the side wall of the cavity of the needle protection sleeve is provided with a plurality of stop protrusions arranged along the circumferential direction, and after the eccentric blocking piece is installed from the front port of the needle protection sleeve, the eccentric blocking piece is extruded through the outer contour to cross the stop protrusions on the front part of the side wall of the cavity and then is installed into the cavity.
Furthermore, the side wall of the front port of the needle protection sleeve is provided with a guide groove and/or a guide rib, and the side wall of the rear part of the catheter seat assembly is provided with a guide rib matched with the guide groove and/or a guide groove matched with the guide rib.
Furthermore, a front baffle part notch communicated with the front part of the cavity is formed in the side wall of the needle protection sleeve, and the front baffle part of the spring clamping piece is arranged in the front part of the cavity of the needle protection sleeve through the front baffle part notch.
Furthermore, a rear baffle portion clamping groove is formed in the rear portion of the needle protecting sleeve, the rear baffle portion of the spring clamping piece is installed in the rear baffle portion clamping groove, a plurality of first elastic clamping hooks are arranged on the rear baffle portion of the spring clamping piece, the first elastic clamping hooks are extruded in the rear baffle portion clamping groove to provide acting force, and the rear baffle portion of the spring clamping piece is clamped in the rear baffle portion clamping groove.
Furthermore, the left side or the right side of the side wall of the needle protection cover is provided with an opening, two connecting part fixing blocks connected with the inner structure of the needle protection cover are arranged in the opening, the two connecting part fixing blocks are arranged up and down and are provided with tooth surfaces in opposite directions, the connecting parts of the spring clamping pieces are arranged in the opening, the connecting parts of the spring clamping pieces are provided with more than two second elastic clamping hooks, the more than two second elastic clamping hooks are extruded to abut against the tooth surfaces of the two connecting part fixing blocks, and the connecting parts of the spring clamping pieces are clamped in the opening of the needle protection cover.
Furthermore, an elastic cantilever part clamping groove is formed in the upper side in the needle protective sleeve, a plurality of clamping protrusions are arranged on the groove wall of the elastic cantilever part clamping groove, and the rear part of the elastic cantilever part of the spring clamping piece is installed in the elastic cantilever part clamping groove and clamped by the clamping protrusions.
Further, the needle file includes seat portion and handle portion, set up hole and the needle fixed orifices of following the axis intercommunication around in the seat portion, seat portion passes through the rear portion of hole suit in the needle lag, the rear end of fixed needle tubing in the needle fixed orifices, handle portion connects in the side of seat portion.
Further, still include infusion hose assembly, infusion hose assembly includes infusion hose, hemostatic clamp, annotates infusion joint, heparin cap, end cap.
Compared with the prior art, the invention has the beneficial effects that: the needle base is pulled backwards, the needle base drives the needle tube to retreat along the axial direction, when the needle point of the needle tube retreats from the eccentric hole of the eccentric separation blade, the self-destruction of a remaining needle is realized, the eccentric separation blade which loses the support of the needle tube freely moves in the cavity of the needle protection sleeve until reaching a balance state, the eccentric separation blade at the moment blocks the front end of the front section of the needle through hole of the needle protection sleeve, the stop needle hole of the spring clamping piece is matched with the annular bulge of the needle tube in a limiting manner in the axial direction behind the needle tube, the needle point of the needle tube is shielded in the needle protection sleeve, and the safety of a product is improved.
Drawings
Fig. 1 is a schematic view of the entire structure of embodiment 1.
Fig. 2 is an exploded view of embodiment 1.
FIG. 3 is a sectional view of example 1.
Fig. 4 is a schematic view of the structure of the needle shield of embodiment 1.
Fig. 5 is a schematic perspective cross-sectional view of the needle shield of example 1.
Fig. 6 is another schematic structural view of the needle shield in embodiment 1.
Fig. 7 is a schematic view of the front end structure of the needle shield in embodiment 1.
Fig. 8 is a schematic structural view of the eccentric cam in embodiment 1.
Fig. 9 is a sectional view of the eccentric cam in embodiment 1.
Fig. 10 is a schematic view of a posture of the single eccentric flap in the balanced state in embodiment 1.
Fig. 11 is another posture view of the single eccentric flap of embodiment 1 in a balanced state.
Fig. 12 is a schematic view of the structure of the spring clip of embodiment 1.
Fig. 13 is another structural view of the spring clip according to embodiment 1.
FIG. 14 is a schematic view of the assembly process of the needle shield, the over-center tab, and the spring clip of example 1.
Fig. 15 is a sectional view of the needle holder in embodiment 1.
FIG. 16 is a schematic view showing the structure of a needle cannula according to embodiment 1.
FIG. 17 is a schematic view of the assembly of the needle cannula, hub, assembled needle shield, eccentric cam, and spring clip of example 1.
Fig. 18 is a schematic structural view of the catheter holder assembly according to embodiment 1.
Fig. 19 is a schematic structural view of the catheter hub in example 1.
FIG. 20 is a schematic view showing the embodiment 1 in which the handle of the needle holder is held to push the needle holder and the needle tube to the desired positions and the indwelling needle is not used.
FIG. 21 is a schematic view showing a self-destruction state from an unused state in example 1.
Fig. 22 is a schematic view of a posture of the 3 eccentric baffles in a balanced state.
Fig. 23 is another schematic view of the 3 eccentric baffles in a balanced state.
Fig. 24 is a schematic view of the entire structure of embodiment 2.
The parts in the figures are numbered as follows:
1-needle protective sleeve
101 cavity
102 stop projection
103 mandril guide hole
104 guide groove
105 guide rib
106 pin through hole
107 front baffle notch
108 rear baffle part clamping groove
109 connecting part fixing block
110 elastic cantilever part clamping groove
111 tooth surface
112 clamping projection
2 eccentric block piece
201 eccentric hole
202 blind hole
203 fulcrum a
204 fulcrum b
205 fulcrum c
3 spring clip
301 front baffle
302 tailgate portion
303 connection part
304 elastic cantilever part
305 pinhole
306 stop pin hole
307 first elastic hook
308 second elastic hook
309 fastener
4 needle seat
401 seat body part
402 handle part
403 inner hole
404 needle fixing hole
5 needle tube
501 slotted hole
502 annular projection
6 conduit seat subassembly
601 conduit seat
6011 guide rib
6012 guide groove
6013 Bayonet
602 metal wedge
603 catheter
604 isolating plug
7 transfusion hose assembly
8 ejector pins.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in conjunction with the accompanying drawings to make it clear to those skilled in the art how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.
Example 1
Referring to fig. 1 to 3, an indwelling needle with an eccentric blocking piece of a shielding needle comprises a needle protecting sleeve 1, an eccentric blocking piece 2, a spring clamping piece 3, a needle base 4, a needle tube 5 and a catheter base assembly 6.
Referring to fig. 4 to 7, a cavity 101 is provided in the front of the needle shield 1, a plurality of stop protrusions 102 are provided in the front of the sidewall of the cavity 101, the stop protrusions are circumferentially arranged on the front of the sidewall of the cavity 101, and a push rod guide hole 103 communicating with the cavity 101 is provided on the lower side of the sidewall of the needle shield 1.
The front end face of the needle protection sleeve 1 is provided with a front port communicated with the cavity 101, the side wall of the front port is provided with a guide groove 104 and a guide rib 105 which extend axially, the guide groove 104 and the guide rib 105 are symmetrically arranged at 180 degrees, the front end of the guide groove 104 extends to the front end face of the needle protection sleeve 1, and the guide rib 105 is arranged on the inner wall of the front port.
A needle through hole 106 which is through along the axis is formed in the rear portion of the needle protection sleeve 1, the front end of the needle through hole 106 is communicated with the cavity 101, and the rear end of the needle through hole 106 is communicated with the center of the rear end face of the needle protection sleeve 1.
The left side or the right side of the side wall of the needle protection cover 1 is set to be open from the cavity 101 to the rear end face, a spring clamping piece mounting structure is arranged on the needle protection cover 1, and the spring clamping piece mounting structure comprises a front baffle part notch 107, a rear baffle part clamping groove 108, two connecting part fixing blocks 109 and an elastic cantilever part clamping groove 110.
The front baffle slot 107 is disposed at the open front end and communicates with the front of the cavity 101. The backplate portion slot 108 is opened in the rear portion of the needle shield 1 along the radial surface and is communicated with the opening, and the backplate portion slot 108 divides the needle through hole 106 into two sections. The two connecting part fixing blocks 109 are arranged in the front of the opening and connected with the inner structure of the needle protecting sleeve 1, and the two connecting part fixing blocks 109 are arranged up and down and are provided with tooth surfaces 111 on opposite surfaces. The elastic cantilever part clamping groove 110 is axially arranged at the upper side in the needle protection sleeve 1 and is communicated with the cavity 101, the opening and the rear baffle part clamping groove 108, and a plurality of clamping protrusions 112 are arranged on the groove wall of the elastic cantilever part clamping groove 110.
Referring to fig. 3, 8 and 9, the eccentric blocking pieces 2 are installed in the cavity 101 of the needle protection sleeve 1 and arranged along the radial plane, the number of the eccentric blocking pieces 2 is more than 1, the eccentric blocking pieces 2 are provided with through eccentric holes 201, the edges of the eccentric holes 201 are provided with rounded corners, the rear end surfaces of the eccentric blocking pieces 2 are provided with a plurality of blind holes 202 uniformly distributed on the peripheral sides of the eccentric holes 201 along the circumferential direction, and the outer contour of the eccentric blocking piece 5 is provided with more than 2 pivots.
The shape of the outer contour of the eccentric baffle piece 2, the number of the supporting points and the distribution positions of the supporting points are variable. In this embodiment, the outer contour of the eccentric blocking piece 2 is provided with 6 fulcrums, which are 2 fulcrums a203, 2 fulcrums b204, and 2 fulcrums c205, and the eccentric blocking piece 2 has 2 postures in the balanced state in the cavity 101 of the needle shield 1, see fig. 10 and 11.
Referring to fig. 3, 12 and 13, the spring clip 3 is installed in the needle shield 1, and the spring clip 3 includes a front baffle portion 301, a rear baffle portion 302, a connecting portion 303 and an elastic cantilever portion 304.
The front baffle portion 301 is mounted in the front of the cavity 101 through the front baffle portion notch 107 of the needle shield 1, the inner structures of the front baffle portion 301 and the needle shield 1 are axially limited to the front and back of the eccentric baffle 2, and the front baffle portion 301 is provided with a needle hole 305 coaxial with the needle through hole 106 of the needle shield 1.
The backplate portion 302 is installed in backplate portion draw-in groove 108 through the uncovered of needle lag 1, and backplate portion 302 is seted up and is stopped a position pinhole 306 coaxial with the needle through-hole 106 of needle lag 1, is equipped with a plurality of first elasticity pothooks 307 with backplate portion draw-in groove 108 matched with on the backplate portion 302, first elasticity pothook 307 is extruded in backplate portion draw-in groove 108 and is provided the effort, makes backplate portion 302 chucking in backplate portion draw-in groove 108.
The two ends of the connecting portion 303 are respectively connected with the front baffle portion 301 and the rear baffle portion 302, the connecting portion 303 is arranged along the opening of the needle shield 1, the connecting portion 303 is provided with more than two second elastic hooks 308 matched with the two connecting portion fixing blocks 109 of the needle shield 1, and the more than two second elastic hooks 308 are pressed against the tooth surfaces 111 of the two connecting portion fixing blocks 109, so that the connecting portion 303 is positioned at the opening of the needle shield 1.
The rear end of the elastic cantilever part 304 is connected with the rear baffle part 302, the elastic cantilever part 304 is installed in the needle shield 1 through the opening of the needle shield 1, the rear part of the elastic cantilever part 304 is installed in the elastic cantilever part clamping groove 110 of the needle shield 1 and clamped by the clamping protrusion 112, the front end of the elastic cantilever part 304 extends to the front port of the needle shield 1, the front end of the elastic cantilever part 304 is provided with a buckle 309, and the elastic cantilever part 304 is upwards propped by the eccentric blocking piece 2 through the front part to generate elastic deformation.
Referring to fig. 14, the assembly process of the needle shield 1, the eccentric catch 2, and the spring clip 3 is as follows: firstly, the eccentric blocking piece 2 is installed in the cavity 101 of the needle protection sleeve 1, specifically, the eccentric blocking piece 2 is installed from the front port of the needle protection sleeve 1, so that the outer contour of the eccentric blocking piece 2 is extruded to cross the stop protrusion 102 at the front part of the side wall of the cavity 101, and then the eccentric blocking piece 2 is installed in the cavity 101. The spring clip 3 is then mounted in the needle shield 1, specifically, the front baffle portion 301 of the spring clip 3 is mounted in the front of the cavity 101 from the front baffle portion notch 107 of the needle shield 1, the rear baffle portion 302 of the spring clip 3 is mounted in the rear baffle portion notch 108 from the opening of the needle shield 1, the rear baffle portion 302 is clamped in the rear baffle portion notch 108 by the first elastic hook 307, the connecting portion 303 of the spring clip 3 is disposed in the opening of the needle shield 1, so that the second elastic hooks 308 arranged in two rows up and down are pressed against the tooth surfaces 111 of the two connecting portion fixing blocks 109 of the needle shield 1, the elastic cantilever portion 304 of the spring clip 3 is mounted in the needle shield 1 from the opening of the needle shield 1, the rear portion of the elastic cantilever portion 304 is mounted in the elastic cantilever portion notch 110, and is clamped by the clamping protrusion 112, and the front part of the elastic cantilever part 304 is arranged on the upper side of the eccentric blocking piece 2.
Referring to fig. 15, the needle holder 4 includes a holder portion 401 and a handle portion 402, the holder portion 401 has an inner hole 403 and a needle fixing hole 404, the inner hole 403 and the needle fixing hole 404 are axially arranged in the holder portion 401, the holder portion 401 is sleeved on the rear portion of the needle shield 1 through the inner hole 403, the needle fixing hole 404 is used for fixing the rear end of the needle tube 5, and the handle portion 402 is connected to the side of the holder portion 401.
Referring to fig. 16, the front end of the needle tube 5 is a needle point, a slot 501 and an annular protrusion 502 are axially arranged in front and back directions on the needle tube 5 near the needle point, the slot 501 is axially formed along the needle tube 5, the annular protrusion 502 is circumferentially and protrudingly formed on the outer wall of the needle tube 5, and the outer diameter of the annular protrusion 502 is larger than the stop needle hole 306 of the spring clip 3, smaller than the needle through hole 106 of the needle protection cover 1, the eccentric hole 201 of the eccentric baffle 2, the needle hole 305 of the spring clip 3, and the inner hole of the catheter 603 of the catheter base assembly 6.
Referring to fig. 17, the assembling process of the needle tube 5, the needle holder 4, the assembled needle protecting sleeve 1, the eccentric blocking piece 2 and the spring clamping piece 3 is as follows: firstly, the auxiliary tool mandril 8 extends into the mandril guide hole 103 of the needle protection sleeve 1, the mandril 8 is operated to jack up the eccentric baffle plate 2 in the cavity 101, and the eccentric hole 201 of the eccentric baffle plate 2 is aligned with the needle through hole 106 of the needle protection sleeve 1. And then the rear end of the needle tube 5 is extended into the front port of the needle protection cover 1, so that the rear end of the needle tube 5 sequentially passes through the needle hole 305 of the spring clamping piece 3, the eccentric hole 201 of the eccentric blocking piece 2, the front section of the needle through hole 106 of the needle protection cover 1, the stop needle hole 306 of the spring clamping piece 3 and the rear section of the needle through hole 106 of the needle protection cover 1 along the axial direction and then extends out of the rear end of the needle protection cover 1. Then, the rear end of the needle tube 5 is inserted into the needle fixing hole 404 through the inner hole 403 of the needle holder 4 and fixed by environment-friendly quick-drying glue. At this time, the auxiliary tool ejector 8 is removed, and the needle tube 5 supports the eccentric cam 2 upward against the front portion of the elastic cantilever portion 304 of the spring clip 3, so that the elastic cantilever portion 304 is elastically deformed.
Referring to fig. 18, the catheter hub assembly 6 comprises a catheter hub 601, a metal wedge 602, a catheter 603 and an isolating plug 604, wherein the metal wedge 602 and the isolating plug 604 are arranged in the catheter hub 601, the front part of the catheter 603 extends out from the front end of the catheter hub 601, and the rear end of the catheter 603 is fixed on the metal wedge 602.
Referring to fig. 3 and 19, the rear portion of the catheter base 601 is installed in the front end of the needle shield 1, a guide rib 6011, a guide groove 6012, and a bayonet 6013 are disposed on a side wall of the rear portion of the catheter base 601, the guide rib 6011 and the guide groove 6012 both extend in the axial direction and are symmetrically arranged at 180 °, the guide rib 6011 is disposed on an outer wall of the rear portion of the catheter base 601, the guide rib 6011 is in guiding fit with the guide groove 104 of the front port of the needle shield 1, the rear end of the guide groove 6012 extends to the rear end surface of the catheter base 601, the guide groove 6012 is in guiding fit with the guide rib 105 of the front port of the needle shield 1, the bayonet 6013 is disposed on the rear side of the guide rib 6011, the bayonet 6013 is in snap fit with the snap 309 of the elastic cantilever portion 304 of the spring clip 3, so as to achieve circumferential and axial locking of the catheter base 601, and the whole catheter base assembly 6 is installed at.
Referring to fig. 20, after the catheter hub assembly 6 is assembled with the needle shield 1, the hub 4 is operated to leave the indwelling needle unused as follows: the handle part 402 of the needle base 4 is held by hand to drive the needle base 4 and the needle tube 5 to move forward, so that the needle base 4 tightly sleeves the tail part of the needle protection sleeve 1, the needle point of the needle tube 5 is exposed from the front end of the catheter 603 of the catheter base assembly 6, and the exposed length of the needle point meets the standard requirement. The lower part of fig. 20 shows the indwelling needle in an unused state.
Referring to fig. 21, after the indwelling needle is used up, the process of pulling the needle holder 4 backwards to trigger the indwelling needle to self-destruct and remove the catheter holder assembly 6 is as follows: the handle part 402 of the hand-held needle base 4 drives the needle base 4 and the needle tube 5 to move backwards, when the needle point of the needle tube 5 exits the eccentric hole 201 of the eccentric separation blade 2, the eccentric separation blade 2 which is not supported by the needle tube 5 freely moves in the cavity 101 of the needle protection sleeve 1 until reaching a balance state, the eccentric separation blade 2 at the moment keeps balance with the inner wall of the cavity 101 of the needle protection sleeve 1 through more than 2 support points of the outer contour, the eccentric hole 201 of the eccentric separation blade 2 is not coaxial with the needle through hole 106 of the needle protection sleeve 1, the solid surface of the eccentric separation blade 2 completely blocks the front end of the front section of the needle through hole 106 of the needle protection sleeve 1, and the blind hole 202 of the eccentric separation blade 2 avoids the needle point of the needle tube 5 to be led. When the needle point of the needle tube 5 continuously retreats to the rear baffle plate part 302 of the spring clip 3, the annular bulge 502 of the needle tube 5 is blocked by the stop needle hole 306 on the rear baffle plate part 302, so that the needle point of the needle tube 5 is shielded in the needle shield 1, and at this time, the product enters a self-destruction state and cannot be used any more. Referring to the lowest part of fig. 21, the elastic cantilever portion 304 of the spring clip 3 is deformed again, the latch 309 at the front end of the elastic cantilever portion 304 is disengaged from the latch 6013 of the catheter hub 601, and the catheter hub assembly 6 can be removed from the front end of the needle shield 1, so that the indwelling needle is self-destructed and the catheter hub assembly 6 is separated.
The number of the eccentric blocking pieces 2 in this embodiment is 1, and the number of the eccentric blocking pieces 2 may be more or less, as long as the function of blocking the front end of the front section of the needle through hole 106 of the needle protection cover 1 and the needle tip of the shielding needle tube 5 can be realized. This is additionally given a schematic view of 3 eccentric flaps 2, the 3 eccentric flaps 2 having 2 positions in a balanced state in the cavity 101 of the needle shield 1, see fig. 22 and 23. In a posture of the 3 eccentric flaps 2 shown in fig. 22 in a balanced state, the center distance between the eccentric hole 201 of the eccentric flap 2 and the needle through hole 106 of the needle shield 1 is L1, and the movement locus of the eccentric hole 201 is a circle having a radius of R1 (R1 = L1); in another posture of the 3 eccentric flaps 2 in the balanced state shown in fig. 23, the center distance between the eccentric hole 201 of the eccentric flap 2 and the needle through hole 106 of the needle shield 1 is L2, and the movement locus of the eccentric hole 201 is a circle having a radius of R2 (R2 = L2). Wherein, the diameter of the eccentric hole 201 of the eccentric baffle 2 is D, the diameter of the needle through hole 106 of the needle shield 1 is D, L1 > (D + D)/2, L2 > (D + D)/2, L1 (R1) and L2(R2) can be the same or different. Thus, the eccentric hole 201 of the eccentric blocking piece 2 is always kept in a non-intersecting and non-overlapping state with the needle through hole 106 of the needle shield 1 in a balanced state, and the edge of the eccentric hole 201 can shield the needle hole of the needle tube 5.
Example 2
Referring to fig. 24, the indwelling needle with the shielding needle eccentric baffle plate is different from embodiment 1 in that the indwelling needle further comprises a transfusion hose assembly 7, the transfusion hose assembly 7 comprises a transfusion hose, a hemostatic clamp, a transfusion connector, a heparin cap and an end cap, and the transfusion hose assembly 7 belongs to the prior art, so that specific structures of various components and connection relations among the components are not repeated.
It should be noted that many variations and modifications of the embodiments of the present invention fully described are possible and are not to be considered as limited to the specific examples of the above embodiments. The above examples are given by way of illustration of the invention and are not intended to limit the invention. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.
Claims (9)
1. The utility model provides a keep somewhere needle with eccentric separation blade of shielding needle which characterized in that includes:
the needle protecting sleeve is internally provided with a cavity in the front part, a mandril guide hole communicated with the cavity is arranged on the lower side of the side wall of the needle protecting sleeve, the front end surface of the needle protecting sleeve is provided with a front port communicated with the cavity, and a needle through hole which is communicated along the axis is arranged in the rear part of the needle protecting sleeve;
the eccentric blocking pieces are arranged in the cavity of the needle protection sleeve and are arranged along the radial surface, more than 1 piece of the eccentric blocking pieces is arranged, eccentric holes are formed in the eccentric blocking pieces, a plurality of blind holes are formed in the rear end surface of the eccentric blocking pieces and are circumferentially arranged on the peripheral sides of the eccentric holes, and more than 2 supporting points are arranged on the outer contour of the blind holes;
the spring clamping piece comprises a front baffle plate part, a rear baffle plate part, a connecting part and an elastic cantilever part, wherein the front baffle plate part is arranged at the front part of a cavity of the needle protection sleeve and axially limits the eccentric baffle plate forwards;
a needle stand connected to the rear side of the needle protecting cover;
the rear end of the needle tube extends into the front port of the needle protection sleeve, and the needle tube sequentially penetrates through the needle hole of the spring clamping piece, the eccentric hole of the eccentric blocking piece, the front section of the needle through hole of the needle protection sleeve, the stop needle hole of the spring clamping piece and the rear section of the needle through hole of the needle protection sleeve along the axial direction and then is fixed on the needle base, the front end of the needle tube is a needle point and is exposed after penetrating through the catheter base assembly, and a slotted hole and an annular bulge which are arranged in the front and at the back are arranged at the position; and
the catheter seat assembly comprises a catheter seat, a metal wedge, a catheter and an isolation plug, wherein the rear part of the catheter seat is arranged in the front end of the needle protection sleeve, and the side wall of the rear part of the catheter seat is provided with a bayonet matched with a buckle of the spring clamping piece;
the outer diameter of the annular bulge of the needle tube is larger than the stop needle hole of the spring clamping piece and smaller than the needle through hole of the needle protecting sleeve, the eccentric hole of the eccentric blocking piece, the needle hole of the spring clamping piece and the catheter inner hole of the catheter seat component;
when the needle base is pulled backwards, the remaining needle is triggered to perform self-destruction, the needle base drives the needle tube to retreat along the axial direction, when the needle point of the needle tube retreats from the eccentric hole of the eccentric separation blade, the eccentric separation blade without the support of the needle tube freely moves in the cavity of the needle protection sleeve until reaching a balanced state, the eccentric separation blade at the moment is in contact with the inner wall of the cavity of the needle protection sleeve through more than 2 support points of the outer contour to keep balance, the solid surface of the eccentric separation blade completely blocks the front end of the front section of the needle through hole of the needle protection sleeve, the blind hole of the eccentric separation blade prevents the needle point of the needle tube from entering the eccentric hole, and when the needle point of the needle tube retreats continuously, the annular bulge of the needle tube is blocked by the stop needle hole; the elastic cantilever part of the spring clamping piece recovers deformation, a buckle at the front end of the elastic cantilever part is disengaged from a bayonet of a catheter seat of the catheter seat assembly, and the catheter seat assembly can be taken down from the front end of the needle protection sleeve.
2. The indwelling needle with an eccentric shield for shielding needle according to claim 1, wherein the front part of the side wall of the cavity of the needle shield is provided with a plurality of stop protrusions arranged circumferentially, and the eccentric shield is inserted into the cavity after being inserted from the front port of the needle shield by being pressed by the outer contour over the stop protrusions in the front part of the side wall of the cavity.
3. The indwelling needle with the shielding needle eccentric baffle according to claim 1, wherein the front port side wall of the needle shield is provided with a guide groove and/or a guide rib, and the rear side wall of the catheter hub assembly is provided with a guide rib and/or a guide groove which are matched with the guide groove.
4. The indwelling needle with an eccentric shield for a shielded needle according to claim 1, wherein the side wall of the needle shield defines a front shield portion notch in communication with the front of the cavity, the front shield portion of the spring clip fitting into the front of the cavity of the needle shield through the front shield portion notch.
5. The indwelling needle with an over-center shield for a shielded needle according to claim 1, wherein the needle shield has a back shield portion notch formed in the back portion of the needle shield, the back shield portion of the spring clip being received in the back shield portion notch, the back shield portion of the spring clip having a plurality of first resilient fingers thereon, the first resilient fingers being compressed in the back shield portion notch to provide a force to clamp the back shield portion of the spring clip in the back shield portion notch.
6. The indwelling needle with the shielding needle eccentric blade according to claim 1, wherein the needle shield has an opening at the left or right side, two connecting portion fixing blocks connected to the inner structure of the needle shield are provided in the opening, the two connecting portion fixing blocks are arranged up and down and have tooth surfaces facing each other, the connecting portion of the spring clip is mounted in the opening, the connecting portion of the spring clip is provided with two or more second elastic hooks, and the two or more second elastic hooks are pressed against the tooth surfaces of the two connecting portion fixing blocks to clamp the connecting portion of the spring clip in the opening of the needle shield.
7. The indwelling needle with an eccentric shielding needle according to claim 1, wherein the needle shield has a slot with a resilient cantilever part at its upper side, the slot wall of the slot has a plurality of clamping protrusions, and the spring clip has a resilient cantilever part at its rear end mounted in the slot and clamped by the clamping protrusions.
8. The indwelling needle with the shielding needle eccentric baffle according to claim 1, wherein the needle holder comprises a holder body and a handle, the holder body has an inner hole and a needle fixing hole which are arranged therein and communicate with each other along the axis, the holder body is sleeved on the rear end of the needle protecting cover through the inner hole, the needle fixing hole is used for fixing the rear end of the needle tube, and the handle is connected to the side of the holder body.
9. The indwelling needle with the shielding needle eccentric baffle according to any one of claims 1 to 8, further comprising an infusion hose assembly, wherein the infusion hose assembly comprises an infusion hose, a hemostatic clamp, an infusion joint, a heparin cap and an end cap.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072381.XA CN111012978A (en) | 2020-01-21 | 2020-01-21 | Remaining needle with shielding needle eccentric blocking piece |
| PCT/CN2021/072447 WO2021147811A1 (en) | 2020-01-21 | 2021-01-18 | Indwelling needle with shielding needle eccentric baffle piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072381.XA CN111012978A (en) | 2020-01-21 | 2020-01-21 | Remaining needle with shielding needle eccentric blocking piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111012978A true CN111012978A (en) | 2020-04-17 |
Family
ID=70203109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010072381.XA Pending CN111012978A (en) | 2020-01-21 | 2020-01-21 | Remaining needle with shielding needle eccentric blocking piece |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111012978A (en) |
| WO (1) | WO2021147811A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021147811A1 (en) * | 2020-01-21 | 2021-07-29 | 贝普医疗科技有限公司 | Indwelling needle with shielding needle eccentric baffle piece |
| WO2022048132A1 (en) * | 2020-09-02 | 2022-03-10 | 苏州林华医疗器械股份有限公司 | Continuous positive pressure maintaining needle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007521918A (en) * | 2004-02-13 | 2007-08-09 | スミス・メディカル・エイエスディ・インコーポレーテッド | Needle tip protector |
| JP2014068711A (en) * | 2012-09-28 | 2014-04-21 | Nipro Corp | Indwelling needle |
| CN203861690U (en) * | 2014-05-12 | 2014-10-08 | 圣光医用制品有限公司 | Vein detained needle capable of preventing needling |
| CN204158810U (en) * | 2014-10-10 | 2015-02-18 | 苏州林华医疗器械有限公司 | A kind of safe type venous retaining needle |
| CN204582151U (en) * | 2015-01-26 | 2015-08-26 | 山东新华安得医疗用品有限公司 | The anti-acupuncture needleless of card form connects venous detaining needle |
| CN204709529U (en) * | 2015-05-21 | 2015-10-21 | 广东爱迪医疗科技有限公司 | One-off card button anti-pricking wound type remaining needle |
| CN204709530U (en) * | 2015-05-21 | 2015-10-21 | 广东爱迪医疗科技有限公司 | Disposable safe type remaining needle |
| CN111012978A (en) * | 2020-01-21 | 2020-04-17 | 贝普医疗科技有限公司 | Remaining needle with shielding needle eccentric blocking piece |
-
2020
- 2020-01-21 CN CN202010072381.XA patent/CN111012978A/en active Pending
-
2021
- 2021-01-18 WO PCT/CN2021/072447 patent/WO2021147811A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021147811A1 (en) * | 2020-01-21 | 2021-07-29 | 贝普医疗科技有限公司 | Indwelling needle with shielding needle eccentric baffle piece |
| WO2022048132A1 (en) * | 2020-09-02 | 2022-03-10 | 苏州林华医疗器械股份有限公司 | Continuous positive pressure maintaining needle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021147811A1 (en) | 2021-07-29 |
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Address after: No.14, Xingji Road, Yongxing street, Longwan District, Wenzhou City, Zhejiang Province Applicant after: Beipu Medical Technology Co.,Ltd. Address before: No.14, Xingji Road, Yongxing street, Longwan District, Wenzhou City, Zhejiang Province Applicant before: Beipu Medical Technology Co.,Ltd. |
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