CN107174693B - Pull rod type safety indwelling needle - Google Patents
Pull rod type safety indwelling needle Download PDFInfo
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- CN107174693B CN107174693B CN201710374087.2A CN201710374087A CN107174693B CN 107174693 B CN107174693 B CN 107174693B CN 201710374087 A CN201710374087 A CN 201710374087A CN 107174693 B CN107174693 B CN 107174693B
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- pull rod
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- operating handle
- sleeve
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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
- A61M5/14—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
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- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
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- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a safe type detaining needle for preventing needle point puncture, in particular to a pull rod type safe detaining needle, which has the structural key points that: the telescopic needle tip protection device comprises a plurality of pull rods, wherein the pull rods, an operating handle sleeve and a storage sleeve component form a telescopic needle tip protection device, the pull rods are uniformly distributed along the circumferential direction of the operating handle sleeve, the rear ends of the pull rods are exposed at the rear of the operating handle sleeve, the front ends of the pull rods penetrate through the inner cavity of the operating handle sleeve and the corresponding part of the storage sleeve component or are sleeved or fixedly connected with the operating handle sleeve, an elastic buckle device is correspondingly arranged at the front section of the operating handle sleeve at the tail end of the pull rods, the elastic buckle device forms a front stop device for preventing the front string of the climbing operation handle, a structure for preventing the relative pull rods from moving backwards when the stretching stroke is in place is further arranged at the front section of the operating handle sleeve, the needle tubes penetrate through needle tip stop members and baffle plates, and the tail ends of the needle tubes are fixed on the needle bases, and the needle bases are fixedly connected with the operating handle sleeve. The invention has the following advantages: simple structure, convenient assembly, convenient mass production and lower production cost.
Description
Technical Field
The invention relates to a safe type detaining needle for preventing needle point puncture, in particular to a pull rod type safe detaining needle.
Background
The safety type detaining needle for preventing needle point puncture is used for accommodating the needle tube after needle withdrawal, and particularly the protective sleeve for wrapping the needle point is generally sleeved together in a mutually telescopic manner by a plurality of sections of cylinders. When withdrawing the needle, one section of the cylinder body stretches and finally wraps the needle tube therein. The two adjacent cylinders realize mutual limiting after stretching in a mode of arranging inner and outer convex shoulders at the corresponding front and rear ends. The structure is effective in preventing the puncture of the needle point, but has the defects of inconvenient assembly, complex structure and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the pull rod type safety indwelling needle which is simple in structure and convenient to assemble.
The object of the present invention is achieved by the following means.
The utility model provides a safe needle of keeping somewhere of pull rod formula, includes pipe subassembly and puncture needle tubing subassembly and back blood viewing device, and pipe subassembly includes pipe and pipe seat, and puncture needle tubing subassembly includes operating handle cover, connecting piece, needle point end out the component, accomodates cover, needle file and needle tubing, accomodates the cover and constitutes accomodate the cover subassembly with the connecting piece rigid coupling to through connecting piece and pipe seat buckle connection, its structural feature lies in: the telescopic protection device for wrapping the needle point is formed by the pull rod, the operating handle sleeve and the storage sleeve component, the pull rod is a plurality of long rod pieces, the pull rod is uniformly distributed along the circumferential direction of the operating handle sleeve, the rear end of the pull rod is exposed behind the operating handle sleeve, the front end of the pull rod penetrates through the inner cavity of the operating handle sleeve and is in sleeve joint or fixedly connection with the corresponding part of the storage sleeve component, an elastic buckle device is correspondingly arranged at the front section of the operating handle sleeve at the tail end of the pull rod, the elastic buckle device forms a front stop device for preventing the front string of the climbing over operating handle, the front section of the operating handle sleeve is also provided with a structure for preventing the rear movement relative to the pull rod when the extending stroke is in place, when the structure is in contact connection with the pull rod, the pull rod starts to be pulled back, the needle tube penetrates through the needle point stop member and the baffle, the tail end of the needle tube is fixed on the needle seat, and the operating handle sleeve is fixedly connected with the needle seat.
Therefore, the telescopic cylinder body in the telescopic protective sleeve in the prior art is replaced by the pull rod, so that the telescopic protective sleeve is simple in structure and convenient to assemble. The pull rod is not in a cylinder structure, and can be detached from the rear part of the operating handle sleeve more than the other cylinders (such as the operating handle sleeve, the storage sleeve assembly and the like) with equal length or close to the other cylinders, so that a longer extension length of the telescopic protective sleeve is obtained, and under the condition that the extension length is the same, a cylindrical member (such as the operating handle sleeve, the storage sleeve assembly and the like) in the telescopic protective device can be shorter. This is an unexpected effect of the present solution. The needle tube which is extended backwards to be in place exits the needle point stopping member and is stopped by the needle point stopping member.
The object of the present invention can also be achieved by the following means.
Further preference for tie rods is:
the tie rod is an elongated rod member which may be rectangular, or circular, or triangular, or oval in cross-section, but is preferably a segment of a ring.
The number of the pull rods can be 2-5, and the most preferable number is 2.
The catheter seat is made of transparent materials, a blood returning bin in the blood returning observation device is positioned on the catheter seat, a needle point stopping member is arranged in a front inner cavity of a connecting piece behind the blood returning bin, a baffle is positioned in an inner cavity of a containing sleeve component behind the needle point stopping member, the baffle is made of a breathable plug material which can be soft or hard and is breathable but hemostatic, a sliding hole corresponding to a pull rod is arranged on an operating handle sleeve, the sliding hole is arranged on a radial baffle plate at the front end of the inner cavity of the operating handle sleeve, two front convex cards and rear convex cards which are distributed at axial intervals are arranged on one side surface of the tail end of the pull rod, an open long groove which enables the convex cards to form elastic convex cards is arranged on the pull rod below the convex cards, an elastic buckling device before stopping is formed by the rear vertical face of the front convex cards and the front vertical face of the rear convex cards, the baffle plate is used as a structure for preventing the operating handle sleeve from continuously moving backwards relative to the pull rod, the baffle plate passing over the front convex cards falls in a groove between the front convex cards, and the front end of the pull rod passes through the operating handle sleeve sliding hole to be fixedly connected with the containing sleeve component.
The baffle can be used as a plug which can prevent the inner cavity opening of the storage sleeve from being permeable to blood but is breathable, and can also support the needle tube.
When the needle is withdrawn, the operating handle sleeve belt pulled back is withdrawn back together with the needle seat and the needle tube, at the moment, the pull rod is not moved, after the baffle climbs over the front convex card and falls into the groove between the front convex card and the rear convex card, the rear end face of the baffle is clamped with the front vertical face of the rear convex card and withdrawn together with the pull rod, and the pull rod is fixedly connected with the storage sleeve assembly, so that the whole storage sleeve assembly is pulled off to be separated from the catheter seat.
The needle seat comprises a cover body, the needle tube is fixedly connected at the center of the cover body, the cover body is covered at the tail end of the operating handle sleeve, a plurality of sliding holes corresponding to the pull rods are arranged on the bottom plate of the cover body, a flange plate is arranged at the tail of the accommodating sleeve, the sliding holes corresponding to the plurality of pull rods are also arranged on the flange plate, the pull rods penetrate through the sliding holes on the cover body and pass through the sliding holes of the accommodating sleeve, the front ends of the pull rods extend to the front part of the operating handle sleeve, one side surface of the front end of the pull rods is provided with two front convex cards and rear convex cards which are distributed at axial intervals, an open long groove is arranged on the pull rod below the convex cards, the rear elevation of the front convex cards is in clamping contact with the front end surface of the flange plate to be used as a structure for preventing the pull rods from continuously moving backwards relative to the accommodating sleeve, the rear end surface of the flange plate is in clamping contact with the front elevation of the rear convex cards to form an elastic clamping device before the pull rod is stopped, the slide hole wall of the flange plate which is climbed by the back protruding card is fallen in a groove between the front protruding card and the back protruding card, the tail end of the pull rod is provided with a protruding card, the operating handle sleeve body is a cylinder body, the cylinder body wall of the front section of the cylinder body is provided with an elastic arm formed by a tongue-shaped sheet extending along the axial direction, the protruding card on the elastic arm stretches into the inner cavity of the cylinder body, after the elastic protruding card climbs over the corresponding protruding card of the tail end of the pull rod, the front elevation of the elastic protruding card is blocked with the back elevation of the pull rod to form a front stopping device of the operating handle front string which prevents the climbing over, the cylinder body in front of the elastic protruding card is provided with a rigid protruding card which stretches to the cylinder cavity, when the rigid protruding card is blocked with the pull rod, the rigid protruding card is in a structure which is pulled back, and the rigid protruding card is blocked with the pull rod or is blocked directly or blocked indirectly by other components.
When the needle is withdrawn, the operation handle sleeve belt which is pulled backwards is withdrawn together with the needle seat and the needle tube, at the moment, the pull rod is not moved, when the elastic convex card climbs over the pull rod rear convex card, the rigid convex card and the rear convex card are contacted, the operation handle sleeve is withdrawn together with the pull rod, the pull rod is withdrawn backwards, and is supported in the flange sliding hole and slides backwards until the flange sliding hole wall is sunk in a groove between the front convex card and the rear convex card of the pull rod, the pull rod does not move relative to the storage sleeve, the operation handle sleeve belt which is withdrawn continuously is taken together with the pull rod and the storage sleeve, and the whole storage sleeve component is pulled out to be separated from the buckling connection with the catheter seat.
The further optimization of the technical scheme is as follows:
the sliding clamping plate body is a circular ring, a flange is arranged outside the circular ring, a sliding hole corresponding to the pull rod is formed in the flange in a penetrating mode, the pull rod is sleeved in the sliding hole in a penetrating mode, the sliding clamping plate is axially clamped between the cover body and the storage sleeve, the sliding clamping plate is radially sleeved in the inner cavity of the operating handle sleeve body, the operating handle sleeve is retracted, and the rigid protruding clip on the sliding clamping plate body is contacted with the sliding clamping plate after penetrating through the flange of the storage sleeve and drives the protruding clip at the tail end of the pull rod to be retracted.
The long rod-shaped pull rod is easy to deform due to deflection, and the sliding clamping plate is inserted, so that the position of the pull rod can be positioned in a follow-up manner, and the sliding clamping plate can be ensured to be clamped with the convex clamp at the tail end of the sliding clamping plate.
The different positions of the blood return observation windows can correspondingly bring about different peculiar structures. One is:
the catheter seat is made of transparent materials, a blood returning bin in the blood returning observation device is positioned on the catheter seat, the needle point stopping component is arranged in a front inner cavity of the connecting piece behind the blood returning bin, the baffle plate is positioned in an inner cavity of the accommodating sleeve component behind the needle point stopping component, the baffle plate is made of a breathable but hemostatic breathable plug material, and a flange for clamping the baffle plate is arranged at the tail end of the inner cavity of the accommodating sleeve component.
The baffle can be used as a plug which can prevent the inner cavity opening of the storage sleeve from being permeable to blood but is breathable, so that the blood is prevented from overflowing, and the needle tube can be supported.
The other is:
the needle seat is provided with a column body protruding forwards, the column body is provided with an inner cavity, the needle tube penetrates through the inner cavity, the tail end of the inner cavity is provided with a ventilation plug, the column body and the storage sleeve are made of transparent materials, the operating handle sleeve is provided with a ventilation groove serving as an observation window, and a blood return bin in the blood return observation device is positioned on the needle seat.
There are the following preferred modes regarding the connection member. One is:
the connecting piece comprises a ladder shell, the inner cavities of the large end and the small end are communicated with the outside to form an opening, the small end is used for being inserted into the inner cavity of the catheter seat, a plurality of convex clamps are arranged on the inner cavity and used for being buckled with the annular groove of the inner cavity of the catheter seat, the small end wall is a thin wall with elasticity, the inner cavity of the large end accommodates an eccentric triangular block serving as a needle point stopping component, the inner cavity of the large end is provided with an annular groove which is buckled and matched with a corresponding annular convex ring on the containing sleeve, and the shoulder wall of the ladder of the inner cavity is provided with a needle passing tube hole.
The other is:
the connecting piece comprises a ladder shell, and a rotation stopping block and an anti-disengaging block which are arranged on the periphery of the shell in a surrounding mode, wherein the inner cavities of the large end and the small end are communicated with the outside to form an opening, the inner cavities of the small end are used for being inserted into the inner cavity of the catheter seat, elastic convex blocks are arranged on the anti-disengaging blocks which are symmetrically arranged on the periphery of the catheter seat and are used for being buckled on corresponding lugs on the periphery of the catheter seat, the rotation stopping block is arranged in a staggered mode relative to the anti-disengaging block and is contacted with the side edges of the lugs, the small end wall is a thin wall with elasticity, the inner cavity of the large end accommodates an eccentric triangular block serving as a needle point stopping member, an annular groove is arranged in the inner cavity of the large end and is buckled with a corresponding annular convex ring on the containing sleeve, and the shoulder wall of the ladder of the inner cavity is provided with a needle tube through hole.
The stop tab prevents rotation of the connector relative to the catheter hub by abutting the lug side.
In summary, compared with the prior art, the invention has the following advantages: simple structure, convenient assembly, convenient mass production and lower production cost.
Drawings
FIG. 1 is a schematic view of a pull rod type safety indwelling needle according to the present invention;
FIG. 2 is a schematic cross-sectional view of the structure of the pull rod type safety indwelling needle according to the present invention;
FIG. 3 is a schematic perspective view of a connector; FIG. 4 is a perspective cross-sectional view of a connector;
FIG. 5 is a schematic perspective view of the receiving sleeve; FIG. 6 is a schematic perspective view of a receiving sleeve; FIG. 7 is a perspective cross-sectional view of the receiving sleeve;
FIG. 8 is a schematic perspective view of a sliding card; FIG. 9 is a schematic perspective view of a sliding card;
fig. 10 is a schematic perspective view of the hub; fig. 11 is a schematic perspective view of the hub; fig. 12 is a perspective cross-sectional view of the hub;
FIG. 13 is a perspective view of a baffle; FIG. 14 is a perspective cross-sectional view of a flap;
FIG. 15 is a schematic perspective view of a tie rod; FIG. 16 is a schematic perspective view of a tie rod;
FIG. 17 is a front view of the operating handle sleeve; FIG. 18 is a perspective view of the operating handle sleeve; FIG. 19 is a left side view of the operating handle sleeve;
FIG. 20 is a schematic view of the connection of the receiver assembly to the catheter hub;
FIG. 21 is a schematic view of the needle withdrawal process; fig. 22 is a schematic view of the completion of needle withdrawal;
FIG. 23 is a schematic view of the structure of a pull rod type safety indwelling needle according to the present invention; FIG. 24 is a top view of FIG. 23;
FIG. 25 is a schematic cross-sectional view of a pull rod type safety indwelling needle according to the present invention;
FIG. 26 is a schematic perspective view of a connector; FIG. 27 is a perspective cross-sectional view of a connector;
fig. 28 is a perspective cross-sectional view of the hub; fig. 29 is a schematic perspective view of the hub;
FIG. 30 is a schematic perspective view of an operating handle sleeve; FIG. 31 is a left side view of the operating handle sleeve;
FIG. 32 is a schematic cross-sectional view of a pull rod type safety indwelling needle according to the present invention;
FIG. 33 is a schematic perspective view of a connector; FIG. 34 is a perspective cross-sectional view of a connector;
FIG. 35 is a schematic perspective view of a receiving sleeve; FIG. 36 is a perspective cross-sectional view of the receiving sleeve;
fig. 37 is a perspective cross-sectional view of the hub; fig. 38 is a schematic perspective view of the hub;
FIG. 39 is a schematic perspective view of a tie rod; FIG. 40 is a schematic perspective view of a tie rod;
FIG. 41 is a right side view of the operating handle sleeve; FIG. 42 is a front cross-sectional view of the operating handle sleeve;
fig. 43 is a schematic view of the completion of needle withdrawal; fig. 44 is an A-A view in fig. 43.
The invention is described in more detail below with reference to the accompanying drawings.
Detailed Description
Embodiment one:
referring to fig. 1 and 2, the pull rod type safety indwelling needle comprises a catheter assembly 1, a puncture needle tube assembly 2 and a blood return observation device, wherein the catheter assembly comprises a catheter and a catheter seat, the inner cavity of the catheter seat of the catheter assembly is a blood return bin, and the seat body is made of transparent materials, so that blood return condition can be observed conveniently; the puncture needle tube component 2 consists of an operating handle sleeve 2.1, a connecting piece 2.2, an eccentric triangular block 2.3, a baffle sheet 2.4, a storage sleeve 2.5, a sliding clamping plate 2.6, a needle seat 2.7, a needle tube 2.8 and a pull rod 2.9. The containing sleeve 2.5 is fixedly connected with the connecting piece 2.2 to form a containing sleeve assembly, and is in buckling connection with the catheter seat through the connecting piece 2.2. The pull rod 2.9, the operating handle sleeve 2.1 and the storage sleeve component form a telescopic protection device for wrapping the needle point, the pull rod 2.9 is a strip-shaped rod piece, two pull rods are uniformly distributed along the circumferential direction of the operating handle sleeve 2.1, and the rear end of the pull rod 2.9 is exposed behind the operating handle sleeve 2.1. The needle seat 2.7 comprises a cover body, the needle tube 2.8 is fixedly connected in the center of the cover body, the cover body is covered at the tail end part of the operating handle sleeve 2.1, and two sliding holes corresponding to the pull rod are arranged on the bottom plate of the cover body. The tail part of the storage sleeve 2.5 is provided with a flange plate, and the flange plate is also provided with slide holes corresponding to the two pull rods. The sliding holes corresponding to the pull rod are formed in the flange of the sliding clamping plate 2.6 in a penetrating mode, the front end of the pull rod 2.9 sequentially penetrates through the sliding holes in the operating handle sleeve, the sliding clamping plate 2.6 and the storage sleeve 2.5 until the front portion of the operating handle sleeve is stretched, and the pull rod 2.9 is connected with the sliding holes in the sliding clamping plate 2.6 and the storage sleeve 2.5 in a sliding mode.
Referring to fig. 3, 4 and 20, the connecting piece 2.2 is a stepped shell, the inner cavities of the large end and the small end are communicated with the outside to form an opening, the small end is used for being inserted into the inner cavity of the catheter seat, a plurality of convex cards 2.2.1 are arranged on the small end and used for being buckled with the annular groove 1.1 of the inner cavity of the catheter seat, and the small end wall is a thin wall, so that the small end is elastic and is convenient to be inserted into and separated from the catheter seat; the large end inner cavity 2.2.3 is used for accommodating the eccentric triangular block 2.3, an annular groove 2.2.2 is arranged at a certain distance from the end face and used for being in tight buckling fit with the annular convex ring 2.5.2 on the storage sleeve 2.5, and the stepped shoulder wall is provided with a needle passing tube hole 2.2.4.
Referring to fig. 5, 6 and 7, the receiving sleeve 2.5 is a stepped cylindrical shell, and a flange-like flange 2.5.3 is arranged on the periphery of the opening of the cylindrical shell, and the flange shape is similar to the cross-sectional shape of the inner cavity of the operating handle sleeve 2.1. An annular convex clamp 2.5.2 is arranged on the periphery of the small end of the ladder and is used for being matched with the inner groove of the connecting piece in a fastening way, a frustum 2.5.1 is arranged on the outer end face of the bottom of the cylinder and is used for enabling the needle passing hole on the eccentric triangular block to be not aligned with the central hole of the eccentric triangular block after the needle tube is withdrawn, and the triangular block blocks the central hole of the frustum from being communicated with the needle passing hole of the connecting piece, so that the needle tube can be prevented from penetrating out of the needle passing hole of the connecting piece in case of forward movement of the needle tube. The open part of the storage sleeve cavity 2.5.5 is provided with a convex clamp 2.5.6, and the stop baffle 2.4 slides outwards along with the needle tube in the cavity when the needle tube is withdrawn, so that the baffle seals the storage sleeve cavity and shields the needle head with blood stains. The flange 2.5.3 is provided with symmetrical pull rod sliding holes 2.5.3.2, and four notches 2.5.3.1 are arranged on the outer side of the flange and are used for sliding out from the operating handle sleeve to avoid the rigid convex clamp 2.1.4 at the end part of the handle sleeve opening when withdrawing the needle.
Referring to fig. 8 and 9, the body of the sliding clamping plate 2.6 is a circular ring, a flange-shaped flange 2.6.1 is arranged on one side of the periphery of the circular ring, the shape of the flange is similar to the shape of the cross section of the inner cavity of the operating handle sleeve 2.1, symmetrical pull rod sliding holes 2.6.1.1 are arranged on the flange, and the central hole of the circular ring can pass through the needle seat rod 2.7.1.
Referring to fig. 10, 11 and 12, the needle holder 2.7 is composed of a cover-shaped shell 2.7.2 with an inner cavity cross section similar to the outer peripheral cross section of the operating handle sleeve 2.1 and a cylinder 2.7.1 with a certain length extending outwards from the center of the cover bottom, the cover bottom is provided with symmetrical pull rod sliding holes 2.7.2.1, the size can smoothly pass through the convex clamp at the rear end of the pull rod, the front section in the middle of the cylinder is a needle penetrating hole 2.7.4, a contact pin fixing hole 2.7.5 is arranged between the needle penetrating hole bottom and the outer end face of the cover bottom, the contact pin fixing hole is connected closely, and a glue dispensing hole 2.7.3 for gluing a needle tube is arranged on the outer end face of the cover bottom.
Referring to fig. 13 and 14, the baffle 2.4 is a thin disc, and has a needle-penetrating hole 2.4.1 in the middle, which is in transition fit with the periphery of the needle tube, so that the transition fit is convenient for closing the opening of the containing sleeve and shielding the needle head along with the rearward movement of the needle tube in the process of withdrawing the needle tube.
Referring to fig. 15 and 16, the pull rod 2.9 is an elongated rod 2.9.1, the cross-sectional edge of which is a narrow profile defined by two arcuate lines with a certain distance and straight lines connecting the two ends of the arcuate lines, respectively, and the cross-section of which may be rectangular, circular, triangular, or elliptical. Two convex cards 2.9.2 and 2.9.3 with a certain interval are arranged on the narrow side surface at one end of the rod piece, an open long groove 2.9.5 is arranged below the convex cards, the upper convex cards form elastic convex cards, and a convex card 2.9.4 is also arranged at the other end of the rod piece.
Referring to fig. 17, 18 and 19, the operating handle sleeve 2.1 is composed of an operating wing 2.1.1 and a thin-walled sleeve 2.1.2, the cross section of which is annular, can be approximately elliptical, can be circular or rectangular with rounded corners. The sleeve is sleeved outside the connecting piece 2.2, the eccentric triangular block 2.3, the baffle plate 2.4, the storage sleeve 2.5, the sliding clamping plate 2.6, the needle seat 2.7, the needle tube 2.8 and the pull rod 2.9; two long sides of a part, which is close to one end of the operation wing panel and is at a certain distance from the sleeve port, are provided with elastic arms 2.1.3, the inner side of the front end of each elastic arm is provided with a convex card 2.1.3.1, the convex card protrudes into the inner cavity 2.1.5 of the sleeve, and the inner side of the sleeve port, which is close to the operation wing panel, is provided with four rigid convex cards 2.1.4.
Referring to fig. 1-20, one side of the front end of the pull rod 2.9 is provided with two front and rear protruding cards 2.9.2 and 2.9.3 which are distributed at axial intervals, the rear vertical surface of the front protruding card 2.9.2 is in clamping contact with the front end surface of the flange plate 2.5.3 to be used as a structure for preventing the pull rod 2.9 from moving backwards relative to the storage sleeve 2.5, the rear end surface of the flange plate 2.5.3 is in clamping contact with the front vertical surface of the rear protruding card 2.9.3 to form an elastic clamping device before the pull rod 2.9 is stopped, and the wall of the flange plate sliding hole 2.5.3.2 which is spanned by the rear protruding card 2.9.3 is trapped in a groove between the front and rear protruding cards 2.9.2 and 2.9.3. The tail end of the pull rod 2.9 is provided with a convex card, and after the elastic convex card 2.1.3.1 on the operating handle sleeve 2.1 climbs over the corresponding convex card 2.9.4 at the tail end of the pull rod, the front elevation and the rear elevation of the pull rod convex card 2.9.4 are in clamping contact to form a front stopping device for preventing the climbing over of the front string of the operating handle sleeve 2.1. When the rigid convex card arranged on the cylinder body in front of the elastic convex card is in contact connection with the pull rod, the pull rod starts to be pulled back, and the rigid convex card is in contact with the pull rod back convex card 2.9.4 through the sliding clamping plate 2.6. The sliding clamping plate 2.6 is axially clamped between the needle seat cover body and the accommodating sleeve 2.5, is radially sleeved in the inner cavity of the cylinder body of the operating handle sleeve 2.1, is retracted, passes through the accommodating sleeve flange notch 2.5.3.1, and is in clamping contact with the sliding clamping plate 2.6 to drive the sliding clamping plate 2.6 to be retracted and then is in clamping contact with the convex clamp 2.9.4 at the tail end of the pull rod.
Indwelling needle assembly:
firstly, a needle tube fixedly-connecting end penetrates through a needle passing hole of a connecting piece, then penetrates through an eccentric triangular block, then penetrates through a central hole of a storage sleeve, the needle tube fixedly-connecting end exposes out of the rear end face of the storage sleeve, then the eccentric triangular block is pushed into an inner cavity of the connecting piece through the front end face of the storage sleeve, and the connecting piece and the storage sleeve are pressed and fastened firmly in a homeopathic manner; then the sliding clamping plate is provided with a flange face towards the upper column body of the needle seat, the column body is sleeved in, the middle inner hole is in sliding fit with the column body, the combined part is inserted into the inner cavity from the rear end opening of the operating handle sleeve, the flange of the sliding baffle is in sliding fit with the inner cavity of the handle sleeve, and the upper cover-shaped shell of the needle seat is fixedly connected with the handle sleeve in a pressing manner; the rear end of the needle tube on the needle tube assembly passes through the baffle plate to be in transition fit with the baffle plate and then penetrates into the needle penetrating hole on the needle seat, the front end surface of the needle seat pushes the baffle plate to slide through the convex card at the mouth part of the inner cavity of the accommodating sleeve to push to the end part of the inner cavity of the accommodating sleeve, the needle tube is continuously inserted into the needle inserting hole on the needle seat, the rear end of the needle tube is exposed in the glue hole at the rear end point of the needle seat, the rear end point of the needle tube is fixedly connected with the glue, then the accommodating sleeve and the connecting piece assembly are inserted into the inner cavity of the handle sleeve, and the flange on the accommodating sleeve is also in sliding fit with the handle sleeve; and then, respectively enabling one ends of the elastic protruding clamps of the two pull rods to face the rear end of the needle seat, penetrating through the needle seat, the sliding clamping plate and the pull rod sliding holes on the storage sleeve until the front end surfaces of the pull rods are basically flush with the stepped shoulder of the connecting piece, completing the assembly of the needle tube puncture assembly, and finally penetrating the needle tube on the needle tube puncture assembly through the catheter assembly until the connecting piece is inserted into the inner cavity of the rear end of the catheter seat, and enabling the connecting piece to be protruded and clamped into the concave annular groove on the inner cavity of the catheter seat, thereby completing the assembly of the remaining needle, as shown in fig. 2.
The retention needle is used:
after the indwelling needle is successfully punctured and placed in the tube, the indwelling catheter assembly is pressed, the operating handle is pulled to sleeve the operating wing, the needle seat is driven to be far away from the catheter assembly, the needle tube gradually withdraws from the catheter, and the needle tube drives the baffle. Because the connecting piece is in buckling fit with the catheter seat, the connecting piece is in tight fit with the storage sleeve, the operating wing is pulled continuously, the storage sleeve and the connecting piece are fixed relative to the catheter seat, the connecting piece and the operating wing gradually slide out of the inner cavity of the handle sleeve, the pull rod is still in a free sliding state in the storage sleeve, the sliding baffle and a pull rod sliding hole on the needle seat, the sliding baffle is also in a free sliding state in the handle sleeve, but slides to the front end opening end of the handle sleeve, when the front end surface of the flange of the sliding baffle is contacted with the slope surface on the elastic convex card on the handle sleeve, the needle tube drives the baffle to slide backwards in the storage sleeve until the baffle is blocked by the convex card at the opening of the rear end of the storage sleeve, and the baffle shields the opening of the storage sleeve; the operation handle sleeve continues to move backwards, the rear end of the pull rod firstly slides through the pull rod sliding hole of the needle seat and enters the inner cavity of the handle sleeve, when the rear end convex clamp is contacted with the rear end face of the flange of the sliding baffle, the baffle drives the pull rod to slide backwards in the pull rod sliding hole on the storage sleeve until the slope face of the elastic convex clamp at the front end of the pull rod is contacted with the front end face of the flange of the storage sleeve; the operation handle sleeve is pulled back again, the elastic convex card at the front end of the pull rod is stressed and contracted, the slope surface of the back convex card slides into the pull rod sliding hole on the flange of the storage sleeve until the back convex card slides through the pull rod sliding hole, at the moment, the front end surface and the back end surface of the flange of the storage sleeve just fall between the vertical surfaces of the front convex card and the back convex card of the elastic convex card of the pull rod, and the pull rod cannot move back and forth for the storage sleeve; the elastic convex clamp on the handle sleeve swings outwards under the action of force, the slope surface of the convex clamp climbs on the side surface of the flange of the sliding baffle until the front end surface of the flange of the sliding baffle is contacted with the vertical surface of the convex clamp in the opening of the handle sleeve, the elastic convex clamp just climbs on the side surface of the flange of the sliding baffle, the vertical surface of the elastic convex clamp is contacted with the rear end surface of the flange of the sliding baffle, and the sliding baffle cannot float relative to the handle sleeve; at this time, each sliding piece of the puncture assembly is completely pulled out and locked, then the operation handle is pulled backwards by a little force, the convex clamp on the connecting piece is driven to slide out of the concave ring groove of the catheter seat, the puncture assembly is separated from the catheter assembly, and the puncture operation is finished. After each sliding piece of the puncture assembly is completely pulled open, the needle tube moves backwards along with the needle seat, the needle tip enters the storage sleeve and is still, the eccentric triangular block is separated from the needle tube, the inner cavity of the connecting piece is in a free turning state, the eccentric triangular block passes through the needle hole and cannot be easily aligned with the central hole of the storage sleeve due to the restriction of the frustum of the front end surface of the storage sleeve, each assembly is compressed inwards after being pulled open, the buckling connection fails, the needle tip cannot be transmitted out of the head of the connecting piece to hurt people, and the purpose of preventing needle puncture is achieved, as shown in figures 21 and 22.
The undescribed portion of this embodiment is identical to the prior art.
Embodiment two:
referring to fig. 23, 24 and 25, this is also an indwelling needle which is formed by observing the condition of blood return in the lumen of the transparent needle hub, and is also composed of a catheter assembly and a needle tube puncture assembly. The catheter seat 2.10 of the catheter assembly is made of semitransparent or opaque materials, and the puncture blood return condition is observed by observing the inner cavity of the transparent needle seat, wherein one end of the catheter seat is usually provided with a standard female luer socket, and the periphery of the catheter seat is provided with a joint tightening screw tooth or a symmetrical screw tooth lug.
Referring to fig. 26 and 27, the connector 2.11 is provided with one or two symmetrically distributed catheter hub rotation stopping blocks 2.11.2 at the periphery of the frustum of the insertion catheter hub, and is further provided with a release preventing block 2.11.1 which is distributed at an angle of 90 degrees with the rotation stopping blocks 2.11.2, and a convex block 2.11.1.1 thereon, wherein the convex block 2.11.1.1 is used for being buckled with a lug on the catheter hub. Before the puncture tube placement and needle withdrawal are successfully operated, the buckling joint prevents the catheter seat from being separated from the puncture assembly; after the needle is withdrawn, the buckling connection is pulled off, so that the connecting piece and the catheter seat are tripped.
Referring to fig. 27 and 29, the needle stand is made of transparent material, and the front end is provided with a needle fixing dispensing hole 2.13.1 and a needle insertion hole 2.13.2, and a blood return bin 2.13.3 is arranged behind the needle insertion hole.
Referring to fig. 30 and 31, the operating handle sleeve 2.12 in the puncture needle tube assembly is made of transparent material, so that the transparent needle seat 2.13 in the inner cavity of the puncture needle tube assembly can be conveniently observed and assembled, the operating handle sleeve can also be made of opaque material, but an observation window 2.12.2 is arranged on the side of the sleeve body facing an operator, the transparent needle seat 2.13 in the inner cavity of the sleeve body is observed and assembled, and the operating wings 2.12.1 are arranged at the front end of the operating sleeve facing the operator side or on two sides of the operating sleeve.
The undescribed portion of this embodiment is the same as that of embodiment one.
Best mode for carrying out the invention:
referring to fig. 32, the pull rod type safety indwelling needle comprises a catheter assembly, a puncture needle tube assembly and a blood return observation device, wherein the puncture needle tube assembly also comprises a connecting piece 2.15, an operating handle sleeve 2.16, a containing sleeve 2.17, a needle seat 2.18, a pull rod 2.19 and an eccentric triangular block.
Referring to fig. 33 and 34, the small end of the connecting piece 2.15 is closed, a pin passing hole 2.15.4 is arranged in the middle, an inner cavity 2.15.3 is used for assembling an eccentric triangular block, symmetrical lugs 2.15.1 are added on the periphery of the stepped shoulder, symmetrical pull rod fixing holes 2.15.2 are formed in the lugs, the lugs and the large end of the connecting piece can be freely placed into the operating handle sleeve, and a concave annular groove 2.15.5 is also formed in the inner cavity of the large end.
Referring to fig. 35 and 36, the receiving sleeve 2.17 comprises a cover 2.17.1 and an outward extending tube 2.17.2 from the middle of the cover bottom, a convex clamping ring 2.17.1.1 is also arranged on the periphery of the front end of the cover, a frustum is arranged on the front end face of the cover, a pinhole is arranged in the middle of the frustum, and the frustum is communicated with the inner cavity 2.17.2.1 of the rear tube.
Referring to fig. 37 and 38, the hub 2.18 may be shortened either as in the embodiment or, as shown in fig. 37 and 38, the hub upper cylinder may be shortened, leaving a small section for guiding when the needle cannula is inserted.
Referring to fig. 39 and 40, the pull rod 2.19 is an elongated rod 2.9.1, the cross-sectional edge of which is a narrow profile defined by two arcuate lines with a certain distance and straight lines connecting the two ends of the arcuate lines, respectively, and the cross-section of which may be rectangular, circular, triangular, or elliptical. Two convex cards 2.19.2 and 2.19.3 with a certain interval are arranged on the narrow side surface at one end of the rod piece, an open long groove 2.19.4 is arranged below the convex cards, the upper convex cards form elastic convex cards, a plurality of positioning convex cards 2.19.1 are arranged on the other side surfaces except the intrados surface at a certain distance from the end surface at the other end of the rod piece, or the end parts are arranged into positioning steps for positioning the depth of the fixed connection hole of the inserted connecting piece.
Referring to fig. 41 and 42, the operating handle sleeve 2.16 is the same as the first embodiment in shape and the cross section of the inner cavity, except that a partition 2.16.1 is arranged at a certain distance from the opening end face to the inner cavity operating wing end, the pull rod sliding holes 2.16.1.1 are symmetrically arranged on the partition, a pin passing hole 2.16.1.2 is formed in the middle of the partition, a handle sleeve cavity on the front side of the partition is used for installing a connecting piece lug, and a plurality of plane bosses 2.16.2 are arranged on the other side of the partition near the pull rod sliding holes and used for limiting the swing amplitude of the pull rod after the pull rod is locked with the partition in a fastening manner, so that the fastening reliability is ensured.
Indwelling needle assembly
Firstly, a needle tube fixedly-connecting end penetrates through a connecting piece pin hole, then penetrates through an eccentric triangular block, then penetrates through a storage sleeve pin hole, the needle tube fixedly-connecting end exposes out of the rear end face of the storage sleeve, then the eccentric triangular block is pushed into an inner cavity of the connecting piece through the front end face of the storage sleeve, and the connecting piece and the storage sleeve are pressed and fastened firmly in a homeopathic manner; then the needle tube passes through the needle hole in the middle of the baffle plate of the receiving sleeve, then is inserted into the needle holder fixing hole, the end part is exposed out of the rear end surface of the needle holder or is level with the end surface, then the needle holder is sleeved and fixedly connected with the rear end part of the handle sleeve, then the needle tube is fixedly connected in the dispensing hole by dispensing, the connecting piece and the receiving sleeve assembly are put into the cavity of the front end part of the handle sleeve, the edge end surface of the cover of the receiving sleeve is contacted with the baffle plate, then one ends of the two pull rods with the inserted positioning convex cards face the rear end surface of the needle holder, are inserted into the pull rod sliding holes of the needle holder, pass through the inner cavity of the handle sleeve and the upper sliding holes of the baffle plate until the front end of the pull rod is inserted into the pull rod fixing hole of the connecting piece, the convex cards are contacted with the rear end surface of the connecting piece, and the pull rod is fixedly connected from the front end surface of the connecting piece by dispensing; finally, the needle tube tip is inserted into the catheter assembly, the needle tip penetrates out of the catheter tip, and the small end of the connecting piece is in plug-in buckling fit with the inner cavity at the rear part of the catheter seat, so that the assembly is completed, as shown in fig. 32.
Indwelling needle use
The pulling is the same as the operation pulling mode of the first embodiment, and the pulling is shown in fig. 43.
FIG. 44 is a right side cross-sectional view of the handle sleeve after the needle withdrawal of the indwelling needle has been pulled apart, showing the restraining relationship of the flexible male clip plateau of the pull rod with the planar abutment of the septum.
The undescribed portion of this embodiment is the same as that of embodiment one.
Claims (10)
1. The utility model provides a safe type of pull rod formula keep somewhere needle, including pipe subassembly and puncture needle tubing subassembly and back blood viewing device, pipe subassembly includes pipe and pipe seat, puncture needle tubing subassembly includes the operating handle cover, the connecting piece, the needle point ends out the component, accomodate the cover, needle file and needle tubing, accomodate the cover and constitute accomodate the cover subassembly with the connecting piece rigid coupling, and be connected with pipe seat buckle through the connecting piece, a serial communication port, still include a pull rod, the telescopic protection device of pull rod and operating handle cover, accomodate the cover subassembly constitution parcel needle point, the pull rod is a rectangular shape member, a plurality of in total, equipartitions along operating handle cover circumference, the pull rod rear end takes off the dew at operating handle cover rear, its front end passes operating handle cover inner chamber and accomodates the corresponding part of cover subassembly or cup joint or rigid coupling, pull rod tail end operating handle cover anterior segment corresponds and is provided with an elasticity buckle device, this elasticity buckle device constitutes the structure that prevents the operating handle front cluster that the climbing over, when the stretching stroke is put in place, this structure is contacted with the pull rod, the pull rod begins to be connected by the rear end, stop the needle file is passed out after the needle file and needle file is fixed with needle tubing.
2. The pull rod type safety needle as claimed in claim 1, wherein the pull rod is an elongated rod member having a cross section of either a rectangular shape, a circular shape, a triangular shape, an elliptical shape, or a segmented ring shape.
3. The pull rod type safety indwelling needle according to claim 1 or 2, wherein the number of the pull rods is 2 to 5.
4. The pull rod type safety indwelling needle according to claim 1, wherein the catheter seat is made of transparent material, a blood returning bin in the blood returning observation device is located on the catheter seat, the needle point stopping member is arranged in a front inner cavity of a connecting piece behind the blood returning bin, the baffle is located in an inner cavity of a containing sleeve component behind the needle point stopping member, the baffle is made of soft or hard breathable but hemostatic breathable plug material, the operating handle sleeve is provided with a sliding hole corresponding to the pull rod, the sliding hole is arranged on a radial partition plate at the front end of the inner cavity of the operating handle sleeve, one side surface of the tail end of the pull rod is provided with two front convex cards and rear convex cards distributed at axial intervals, an open long groove is formed in the pull rod below the convex cards, the rear elevation of the front convex cards and the front end surface of the partition plate form elastic buckling devices before stopping, the rear end surface of the partition plate contacts with the front elevation of the rear convex cards to be used as a structure for preventing the operating handle sleeve from continuing to move backwards relative to the pull rod, the partition plate passing over the front convex cards falls into a groove between the front convex cards and rear convex cards, and the front end of the handle sleeve passes through the containing sleeve component.
5. The pull rod type safety indwelling needle according to claim 1, in which the needle stand comprises a cover body, the needle tube is fixedly connected in the center of the cover body, the cover body is covered at the tail end of the operating handle sleeve, a plurality of sliding holes corresponding to the pull rods are arranged on the bottom plate of the cover body, a flange plate is arranged at the tail of the accommodating sleeve, a plurality of sliding holes corresponding to the pull rods are also arranged on the flange plate, the pull rods pass through the sliding holes on the cover body and pass through the sliding holes of the accommodating sleeve, the front ends of the pull rods extend to the front part of the operating handle sleeve, one side surface of the front end of the pull rods is provided with two front and rear convex cards distributed at axial intervals, an open long groove is arranged on the pull rod below the convex cards, the rear elevation of the front convex cards is in contact with the front end surface of the flange plate to be used as a structure for preventing the pull rods from continuously moving backwards relative to the accommodating sleeve, the rear end surface of the flange plate and the front elevation cards of the rear convex cards form elastic clamping devices before stopping the pull rods, the slide hole wall of the flange plate which is climbed by the back protruding card is fallen in a groove between the front protruding card and the back protruding card, the tail end of the pull rod is provided with a protruding card, the operating handle sleeve body is a cylinder body, the cylinder body wall of the front section of the cylinder body is provided with an elastic arm formed by a tongue-shaped sheet extending along the axial direction, the protruding card on the elastic arm stretches into the inner cavity of the cylinder body, after the elastic protruding card climbs over the corresponding protruding card of the tail end of the pull rod, the front elevation of the elastic protruding card is blocked with the back elevation of the pull rod to form a front stopping device of the operating handle front string which prevents the climbing over, the cylinder body in front of the elastic protruding card is provided with a rigid protruding card which stretches to the cylinder cavity, when the rigid protruding card is blocked with the pull rod, the rigid protruding card is in a structure which is pulled back, and the rigid protruding card is blocked with the pull rod or is blocked directly or blocked indirectly by other components.
6. The pull rod type safety indwelling needle according to claim 5, wherein the other member which is clamped between the rigid convex clamp and the pull rod rear convex clamp is a sliding clamp plate, the sliding clamp plate body is a circular ring, a flange is arranged outside the circular ring, a sliding hole which is arranged corresponding to the pull rod is penetrated through the flange, the pull rod is sleeved in the sliding hole in a penetrating manner, the sliding clamp plate is axially clamped between the cover body and the accommodating sleeve, the sliding clamp plate is radially sleeved in the inner cavity of the operating handle sleeve body, and the retracted operating handle sleeve is sleeved with the rigid convex clamp which is contacted with the sliding clamp plate after penetrating through the flange of the accommodating sleeve and drives the sliding clamp plate to be retracted and contacted with the convex clamp at the tail end of the pull rod.
7. The pull rod type safety indwelling needle according to claim 1, wherein the catheter base is made of transparent material, a blood return bin in the blood return observation device is located on the catheter base, the needle point stopping member is arranged in a front inner cavity of the connecting piece behind the blood return bin, the baffle is located in an inner cavity of the accommodating sleeve component behind the needle point stopping member, the baffle is made of soft or hard breathable but hemostatic breathable plug material, and a flange for clamping the baffle is arranged at the tail end of the inner cavity of the accommodating sleeve component.
8. The pull rod type safety indwelling needle according to claim 1, wherein the needle stand has a columnar body protruding forward, the columnar body has an inner cavity in which the needle tube penetrates, a vent plug is provided at the end of the inner cavity, the columnar body and the housing sleeve are made of transparent materials, a vent groove is provided on the operating handle sleeve as an observation window, and a blood return bin in the blood return observation device is located on the needle stand.
9. The pull rod type safety indwelling needle according to claim 1, wherein the connecting member is formed by a stepped housing, the inner cavities of the large end and the small end are communicated with the outside to form an opening, the small end is used for being inserted into the inner cavity of the catheter seat, a plurality of convex clamps are arranged on the small end and used for being buckled with an annular groove of the inner cavity of the catheter seat, the small end wall is a thin wall with elasticity, the inner cavity of the large end accommodates an eccentric triangular block serving as a needle point stopping member, the inner cavity of the large end is provided with an annular groove to be buckled with a corresponding annular convex ring on the accommodating sleeve, and the stepped shoulder wall of the inner cavity is provided with a needle tube passing hole.
10. The pull rod type safe indwelling needle according to claim 1, wherein the connecting piece is composed of a step shell, a rotation stopping block and an anti-disengaging block which are arranged around the periphery of the shell in a surrounding mode, the inner cavities of the large end and the small end are communicated with the outside to form an opening, the small end is used for being inserted into the inner cavity of the catheter seat, elastic protruding blocks are arranged on the anti-disengaging blocks which are symmetrically arranged around the periphery of the inner cavity and are used for being buckled on corresponding lugs on the outer peripheral surface of the catheter seat, the rotation stopping block is arranged in a staggered mode relative to the anti-disengaging blocks and is contacted with the side edges of the lugs, the small end wall is a thin wall with elasticity, the inner cavity of the large end accommodates an eccentric triangular block serving as a needle point stopping member, an annular groove is arranged in the inner cavity of the large end and is buckled with a corresponding annular protruding ring on the accommodating sleeve, and the shoulder wall of the step of the inner cavity is provided with a needle passing tube hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710374087.2A CN107174693B (en) | 2017-05-24 | 2017-05-24 | Pull rod type safety indwelling needle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710374087.2A CN107174693B (en) | 2017-05-24 | 2017-05-24 | Pull rod type safety indwelling needle |
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| CN107174693A CN107174693A (en) | 2017-09-19 |
| CN107174693B true CN107174693B (en) | 2023-08-15 |
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| CN201710374087.2A Active CN107174693B (en) | 2017-05-24 | 2017-05-24 | Pull rod type safety indwelling needle |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109646761A (en) * | 2018-12-29 | 2019-04-19 | 顶医疗科技（昆山）有限公司 | A kind of anti-venous indwelling needle |
| CN111012977B (en) * | 2020-01-21 | 2024-09-10 | 贝普医疗科技股份有限公司 | Penholder type indwelling needle with shielding needle eccentric baffle |
| WO2023220845A1 (en) * | 2022-05-16 | 2023-11-23 | 百仕韦(长汀)医疗器械有限公司 | Hemodialysis needle with swing brake pad |
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| CN207856027U (en) * | 2017-05-24 | 2018-09-14 | 福建省百仕韦医用高分子股份有限公司 | Rod-pulling type safe type retention needle |
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| JP2007151752A (en) * | 2005-12-02 | 2007-06-21 | Nipro Corp | Indwelling needle |
| CN202590066U (en) * | 2012-02-09 | 2012-12-12 | 张亚平 | Antithrombotic anticoagulant type safe indwelling needle |
| WO2014201709A1 (en) * | 2013-06-18 | 2014-12-24 | 浙江康德莱医疗器械股份有限公司 | Safe, intravenous infusion indwelling needle component |
| CN104645447A (en) * | 2015-01-29 | 2015-05-27 | 福建省百仕韦医用高分子股份有限公司 | Indwelling needle with double-slit protection sleeve |
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| CN107174693A (en) | 2017-09-19 |
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