CN111888587A - Acupuncture device is prevented to elasticity lantern ring and dog cooperation formula - Google Patents

Acupuncture device is prevented to elasticity lantern ring and dog cooperation formula Download PDF

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Publication number
CN111888587A
CN111888587A CN202010723705.1A CN202010723705A CN111888587A CN 111888587 A CN111888587 A CN 111888587A CN 202010723705 A CN202010723705 A CN 202010723705A CN 111888587 A CN111888587 A CN 111888587A
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China
Prior art keywords
needle
hole
stop
stop block
elastic
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CN202010723705.1A
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Chinese (zh)
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张洪杰
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Beipu Medical Technology Co ltd
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Beipu Medical Technology Co ltd
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Priority to CN202010723705.1A priority Critical patent/CN111888587A/en
Publication of CN111888587A publication Critical patent/CN111888587A/en
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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
    • A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (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)

Abstract

An elastomeric collar and stopper mating anti-needle-stick device comprising: the rear end of the conduit seat component is provided with an anti-falling structure; the needle protecting sleeve is provided with a needle through hole, a sliding groove and a slot; the elastic lantern ring is sleeved on the needle protective sleeve; the stop block is slidably arranged in the chute, one surface of the stop block is matched with the needle tube, and the other surface of the stop block is supported on the inner wall of the elastic sleeve ring; the limiting sheet is arranged in the slot and is provided with a stop hole; a needle stand which is sleeved on the rear part of the needle protection sleeve; the needle tube penetrates through the catheter seat assembly, the needle protecting sleeve and the limiting sheet and provides support for the stop block, the rear end of the needle tube is fixed in the needle seat, and a protruding buckle is arranged at the position close to the front end. The needle base is pulled backwards, the needle base drives the needle tube to retreat, when the needle tube retreats to the protruding buckle and is blocked by the stop hole of the limiting piece, the front end of the needle tube retreats away from the stop block, the stop block slides in the sliding groove of the needle protection sleeve under the action of the elastic sleeve ring, so that the front end of the needle tube is blocked, the needle point is shielded in the needle protection sleeve, and the safety of a product is improved.

Description

Acupuncture device is prevented to elasticity lantern ring and dog cooperation formula
Technical Field
The invention relates to the technical field of needle head protection, in particular to an elastic lantern ring and stop block matched type acupuncture-preventing device.
Background
After the existing product with the needle tube is used and pulled out, the needle point of the needle tube is exposed outside more, so that the puncture wound is easily caused to people, particularly, the potential safety hazard is more serious for the medical needle product, and once the used medical needle product causes the puncture wound to people, the possibility of cross infection exists.
Disclosure of Invention
The invention aims at the problems and provides an elastic lantern ring and stop block matched type acupuncture-proof device.
The purpose of the invention can be realized by the following technical scheme:
an elastomeric collar and stopper mating anti-needle-stick device comprising:
the rear end of the conduit seat component is provided with an anti-falling structure;
the needle protection sleeve is internally provided with a needle through hole which is communicated along the axis, the front part of the needle protection sleeve is arranged from the rear end of the catheter seat assembly, the front end of the outer wall of the needle protection sleeve is provided with a sliding chute, the sliding chute divides the front end of the needle through hole into two sections, the rear end of the outer wall of the needle protection sleeve is provided with a slot, and the slot divides the rear end of the needle through hole into two sections;
the elastic lantern ring is sleeved at the front end of the outer wall of the needle protection sleeve through elastic deformation and corresponds to the sliding groove in position;
the check block is slidably arranged in the sliding groove of the needle protection sleeve, one surface of the check block facing the sliding groove of the needle protection sleeve is matched with the needle tube, the other surface of the check block facing the outside of the sliding groove of the needle protection sleeve is supported on the inner wall of the elastic lantern ring, and the rear part of the check block is matched with the anti-falling structure of the catheter seat component;
the limiting piece is arranged in the slot of the needle protection sleeve and is provided with a stop hole corresponding to the needle through hole;
a needle stand which is sleeved on the rear part of the needle protection sleeve;
the needle tube penetrates through the catheter seat assembly, the needle through hole of the needle protection sleeve and the stop hole of the limiting sheet and provides support for the stop block, the rear end of the needle tube is fixed in the needle seat, and a convex buckle with the size larger than that of the stop hole of the limiting sheet is arranged at the position, close to the front end, of the outer wall of the needle tube;
the needle file is pulled backward and is driven the needle tubing and retreat along the axial together, when the needle tubing retreats protruding buckle and is blocked by the stop hole of spacing piece, the front end of needle tubing retreats and leaves the dog, the dog loses the support of needle tubing, under the elasticity restoring force effect of the elastic sleeve ring, the dog breaks away from with the anti-disengaging structure of conduit saddle subassembly, and slide toward the spout of needle lag is inside, thereby the dog blocks the front end department of the needle through-hole of needle lag, prevent that the front end of needle tubing from stretching out forward, the needle lag, the shielding of dog and spacing piece realization to the needle tubing front end, the needle file continues to be pulled backward, protruding buckle through the needle tubing drives spacing piece, and then drive the needle lag and the elastic sleeve ring and the dog on it and move backward together, when the needle lag is pulled out from the rear end of conduit saddle subassembly, realize separating with the conduit saddle subassembly.
The structure of the stop block can adopt the following two schemes.
One scheme is that the anti-falling structure of the conduit seat assembly is an annular clamping groove which is inwards concave in the circumferential direction at the rear end of the inner wall of the conduit seat, and a stopping protrusion matched with the annular clamping groove of the conduit seat is arranged on the rear side of the stop block.
The other scheme is that the anti-falling structure of the conduit seat assembly is a clamping groove penetrating through the side wall of the conduit seat, and a retaining bulge matched with the clamping groove of the conduit seat is arranged on the rear side of the other side of the stop dog. Furthermore, both sides of the stop block can be provided with positioning convex ribs matched with the sliding grooves of the needle protection sleeve.
Further refine above-mentioned technical scheme, the constant head tank that supplies elasticity lantern ring card to go into can be equipped with on the another side of dog. The front side, the rear side and the two sides of the stop block can be provided with positioning surfaces matched with the sliding grooves of the needle protecting sleeve.
The needle protection cover is characterized in that an annular positioning groove which is inwards concave along the circumferential direction is arranged at the front end of the outer wall of the needle protection cover, a positioning plane which is parallel to the axis is arranged on the groove bottom surface of the annular positioning groove, a sliding groove is arranged on the positioning plane, the sliding groove and the inserting groove are arranged along the radial plane, and the elastic lantern ring is sleeved in the annular positioning groove through elastic deformation.
The limiting piece can be in an L-shaped piece shape, one side of the limiting piece is installed in the slot of the needle protection sleeve and is provided with a stop hole, and the other side of the limiting piece is arranged on the outer wall of the needle protection sleeve. And flanges are arranged at the edges of the stop holes of the limiting pieces.
The groove that communicates with the hole is seted up to the front end department of needle tubing, the dog with needle tubing matched with one side can adopt the circular arc transition with the leading flank, when the needle tubing retreats when the dog, the one side of dog hugs closely on the needle tubing outer wall under the elasticity restoring force effect of the elastic lantern ring to be located the groove of needle tubing outside, make the needle tubing smoothly retreat.
Compared with the prior art, the invention has the beneficial effects that: overall structure is compact, and the operation is simple, the needle file is stimulateeed backward, make the needle file drive the needle tubing retreat along the axial, when the needle tubing retreats protruding buckle and is blocked by the stop hole of spacing piece, the front end of needle tubing retreats and leaves the dog, the dog loses the support of needle tubing, and under the elasticity restoring force effect of the elastic sleeve ring, inside the slip of spout toward the needle lag, thereby block the front end department of the needle through-hole of needle lag, prevent that the front end of needle tubing from stretching out forward, the realization is shielded the front end needle point of needle tubing in the needle lag, the security of product has been improved.
Drawings
Fig. 1 is an exploded view of embodiment 1.
FIG. 2 is a full sectional view of example 1.
Fig. 3 is a schematic structural view of the catheter holder assembly of embodiment 1.
Fig. 4 is an assembly diagram of the needle shield, the elastic collar, the stopper piece, and the needle tube in embodiment 1.
Fig. 5 is a schematic view of the structure of the needle shield in embodiment 1.
Fig. 6 is a schematic structural view of a stopper in embodiment 1.
Fig. 7 is a partial sectional view of embodiment 1.
Fig. 8 is a schematic structural view of a stopper in embodiment 1.
Fig. 9 is a schematic structural view of a hub and a needle cannula in example 1.
FIG. 10 is a partial sectional view showing the example 1 brought into a self-destruction state.
Fig. 11 is a schematic structural view of the catheter hub assembly separated from the catheter hub assembly after the self-destruction state of embodiment 1.
FIG. 12 is a schematic view showing the process of passing the slit of the syringe through the stopper in example 1.
The components in fig. 1 to 12 are numbered as follows:
1, a conduit seat assembly, a 101 conduit seat, a 1011 annular clamping groove, a 102 metal wedge, a 103 conduit and a 104 isolating plug;
2-needle protective sleeve, 201-needle through hole, 202 annular positioning groove, 203 positioning plane, 204 sliding groove, 205 slot, 206 groove and 207 groove surface;
3 an elastic collar;
4, a stop block, a 401 positioning groove, a 402 positioning surface, a 403 backstop bulge and a 404 circular arc;
5, a limiting sheet and 501 stop holes;
6 needle seats, 601 seat parts and 602 handle parts;
7 needle tube, 701 protruding buckle, 702 groove.
Fig. 13 is an exploded view of embodiment 2.
Fig. 14 is a full sectional view of embodiment 2.
Fig. 15 is a schematic structural view of the catheter hub assembly of example 2.
Fig. 16 is an assembly view of the needle shield, the elastic collar, the stopper piece, and the needle tube according to example 2.
Fig. 17 is a schematic view of the structure of the needle shield in embodiment 2.
Fig. 18 is a schematic structural view of a stopper in embodiment 2.
Fig. 19 is a partial sectional view of embodiment 2.
Fig. 20 is a schematic structural view of a stopper piece in embodiment 2.
FIG. 21 is a partial sectional view showing the state of self-destruction in example 2.
Fig. 22 is a schematic structural view of the catheter hub assembly separated from the catheter hub assembly after the self-destruction state of embodiment 2.
The catheter hub, stop and stop tabs in fig. 13-22 are numbered as follows, with the remaining component numbers referring to fig. 1-12:
101 a conduit seat and 1011 a clamping groove;
4, a stop block, a 401 positioning groove, a 402 positioning surface, a 403 backstop bulge, a 404 circular arc and a 405 positioning convex rib;
5 limiting sheets, 501 stop holes and 502 flanges.
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 and 2, the elastic collar and stopper matching type acupuncture prevention device comprises a catheter holder assembly 1, a needle protection sleeve 2, an elastic collar 3, a stopper 4, a limiting sheet 5, a needle seat 6 and a needle tube 7.
Referring to fig. 2 and 3, the catheter hub assembly 1 comprises a catheter hub 101, a metal wedge 102, a catheter 103, and an isolating plug 104, the metal wedge 102 and the isolating plug 104 being mounted in a back-and-forth arrangement in the catheter hub 101, the catheter 103 extending from the front end of the catheter hub 101 and having its rear end fixed to the metal wedge 102. The rear end department of pipe seat 101 inner wall is equipped with anti-disengaging structure for with the protruding 403 cooperation of stopping of dog 4, be connected with pipe seat 101 to guarantee needle lag 2, refer to fig. 2, anti-disengaging structure is the ring groove 1011 of indent in the rear end department circumference of pipe seat 101 inner wall.
Referring to fig. 2, the front of the needle shield 2 is loaded into the catheter hub 101 from the rear end of the catheter hub 101. Referring to fig. 4 and 5, the needle shield 2 is cylindrical, a needle through hole 201 is formed in the needle shield 2 and penetrates along the axis, a ring-shaped positioning groove 202 is formed at the front end of the outer wall of the needle shield 2 and is arranged along the circumferential direction, the annular positioning groove 202 is used for installing the elastic lantern ring 3, the front and back side groove walls of the annular positioning groove 202 block the elastic lantern ring 3 to prevent the elastic lantern ring from moving axially, the bottom surface of the annular positioning groove 202 is provided with a positioning plane 203 parallel to the axis of the needle protection cover 2, the distance from the positioning plane 203 to the axial line of the needle shield 2 is less than the radius of the groove bottom of the annular positioning groove 202, the positioning plane 203 is provided with a sliding groove 204 arranged along the radial surface of the needle shield 2, the width of the sliding groove 204 is greater than that of the annular positioning groove 202 and extends beyond the front and rear groove walls of the annular positioning groove 202, the sliding groove 204 divides the front end of the needle through hole 201 into two sections, and the sliding groove 204 is used for installing the stopper 4. The rear end of the outer wall of the needle protection sleeve 2 is provided with a slot 205 arranged along the radial surface, the slot 205 divides the rear end of the needle through hole 201 into two sections, and the slot 205 is used for installing the limiting sheet 5.
Referring to fig. 4 and 7, the elastic collar 3 is sleeved in the annular positioning groove 202 of the needle shield 2 through elastic deformation, and the inner diameter of the elastic collar 3 is smaller than the groove bottom diameter of the annular positioning groove 202.
Referring to fig. 4, 6 and 7, the stopper 4 is mounted in the sliding groove 204 of the needle shield 2 and is slidable along the vertical direction of the positioning plane 203, one surface of the stopper 4 facing the inside of the sliding groove 204 is matched with the needle tube 7, the other surface of the stopper 4 facing the outside of the sliding groove 204 is supported on the inner wall of the elastic collar 3 and is provided with a positioning groove 401 for the elastic collar 3 to be clamped in, positioning surfaces 402 matched with the sliding groove 204 are arranged on the front side, the rear side and the two sides of the stopper 4, a retaining protrusion 403 matched with the annular groove 1011 of the catheter seat 101 is arranged on the rear side of the stopper 4, a groove 206 corresponding to the retaining protrusion 403 is further formed at the front end of the outer wall of the needle shield 2, see fig. 5, and the groove 206 is communicated with the rear side of the.
Referring to fig. 4 and 8, the position-limiting sheet 5 is in the shape of an L-shaped sheet, one side of the position-limiting sheet 5 is arranged in the slot 205 of the needle protection cover 2 in an interference manner, and a stop hole 501 corresponding to the needle through hole 201 of the needle protection cover 2 is formed thereon. The back end department of the outer wall of the needle shield 2 is also provided with a concave table surface 207 which is parallel to the axis of the needle shield 2 and is concave inwards, see fig. 5, the concave table surface 207 is arranged corresponding to the notch of the slot 205 so as to facilitate the assembly and disassembly of the limiting piece 5, and the other side of the limiting piece 5 is arranged on the concave table surface 207 of the needle shield 2.
Referring to fig. 2 and 9, the needle holder 6 includes a holder portion 601 and a handle portion 602, the holder portion 601 has an inner hole and a needle fixing hole which are axially communicated with each other, the holder portion 601 covers the rear portion of the needle shield 2 through the inner hole, and the front end surface of the holder portion is abutted against the rear end surface of the catheter holder 101, the needle fixing hole is used for fixing the rear end of the needle tube 7, and the handle portion 602 is connected to the side of the holder portion 601. The needle tube 7 penetrates through an inner hole of the guide tube 103, an inner hole of the metal wedge 102, the isolation plug 104, a needle through hole 201 of the needle protection sleeve 2 and a stop hole 501 of the limiting sheet 5 and provides support for the stop block 4, the front end of the needle tube 7 is a needle point and is exposed out of the front end of the guide tube 103, the rear end of the needle tube 7 is fixed in a needle fixing hole of a seat body 601 fixed on the needle seat 6, a protruding buckle 701 protruding along the circumferential direction is arranged at the position, close to the front end, of the outer wall of the needle tube 7, the outer diameter of the protruding buckle 701 is larger than the stop hole 501 of the limiting sheet 5 and smaller than the inner hole of the guide tube 103, the inner hole of the metal wedge 102 and the needle through hole 201 of the needle protection sleeve 2, and the axial distance between the protruding buckle 701 and the.
During assembly, the stop 4 is first installed into the sliding groove 204 of the needle shield 2, the stop protrusion 403 of the stop 4 is installed into the groove 206, and one side of the limiting piece 5 is installed into the slot 205 of the needle shield 2. Then, the rear end of the needle tube 7 is inserted from the front end of the needle through hole 201 of the needle shield 2, passes through the stop hole 501 of the stop piece 5 backwards, and then extends out from the rear end of the needle through hole 201 of the needle shield 2. Then, the rear end of the needle tube 7 is inserted into the needle fixing hole after passing through the inner hole of the needle base 6 and is fixed by environment-friendly quick-drying glue. The rear part of the needle shield 2 is then fitted into the inner bore of the seat body 601 of the needle seat 6, and the rear end face of the needle shield 2 is made to abut against the bottom surface of the inner bore of the seat body 601, while the elastic collar 3 is fitted in the annular positioning groove 202 of the needle shield 2 and the positioning groove 401 of the stopper 4, or successively. The forward end of the needle cannula 7 is then inserted into the catheter hub assembly 1, the catheter hub assembly 1 being an assembled kit, and the forward end of the needle cannula 7 is inserted from the rear end of the catheter hub 101 and advanced sequentially through the septum 104 and the metal wedge 102 into the catheter 103. Finally, the front part of the needle shield 2 is installed into the catheter seat 101 from the rear end of the catheter seat 101, the front end surface of the seat body 601 of the needle seat 6 abuts against the rear end surface of the catheter seat 101, the needle tip of the needle tube 7 is exposed from the front end of the catheter 103 at the moment, the exposed length of the needle tip meets the standard requirement, and the retaining protrusion 403 of the stopper 4 is arranged in the annular clamping groove 1011 of the catheter seat 101 for axial limiting, so that the needle shield 2 is well connected with the catheter seat 101 without external force. Thus, the assembly of the anti-acupuncture device is completed, and the anti-acupuncture device is in an unused state.
When the puncture-preventing device is used for puncture in clinic, the handle part 602 of the needle base 6 is held by hand to drive the needle base 6 and the needle tube 7 to move backwards. Referring to fig. 10, when the needle tube 7 is retracted to the position where the protruding buckle 701 is blocked by the stop hole 501 of the limiting plate 5, the front end of the needle tube 7 is retracted away from the stopper 4, the stopper 4 loses the support of the needle tube 7, the stop protrusion 403 of the stopper 4 is disengaged from the ring-shaped slot 1011 of the catheter hub 101 under the elastic restoring force of the elastic collar 3, the stopper 4 slides towards the inside of the sliding slot 204 of the needle shield 2 along the vertical direction of the positioning plane 203, thereby blocking the front end of the needle through hole 201 of the needle shield 2 and preventing the front end of the needle tube 7 from extending forwards, at this time, the front end of the needle tube 7 is shielded in the needle shield 2 by the stopper 4 and the limiting plate 5, the needle tube 7 and the needle shield 2 cannot move relatively along the axis, and the needle pricking device enters a self-destruction. Meanwhile, since the retaining protrusion 403 of the stopper 4 is disengaged from the annular groove 1011 of the catheter hub 101, the anti-slip function between the stopper 4 and the catheter hub 101 is disabled, and the catheter hub assembly 1 is separable as a whole.
Referring to fig. 11, the handle portion 602 of the needle holder 6 is continuously held by hand to drive the needle holder 6 and the needle tube 7 to move backward, the protruding buckle 701 of the needle tube 7 drives the limiting piece 5, and further drives the needle protection cover 2 and the elastic collar 3 and the stop block 4 thereon to move backward together, and when the needle protection cover 2 is pulled out from the rear end of the catheter holder 101, the separation from the catheter holder assembly 1 is realized.
It should be noted that, for the needle tube 7 with the slit 702 at the front end, consideration is given to the case when the slit 702 of the needle tube 7 passes the stopper 4 in an extreme case during the retraction of the needle tube 7. With the stopper 4 of the present embodiment, since the stopper 4 is a block and the surface of the stopper 4 that fits the needle tube 7 is a whole surface structure, and the length of the surface is greater than the length of the groove 702 of the needle tube 7, and the surface is transited by the arc 404 with the front side surface of the stopper 4, referring to fig. 12, when the groove 702 of the needle tube 7 retreats past the stopper 4, most of the surface of the stopper 4 that fits the needle tube 7 is located on the surface of the needle tube 7, and tightly attached to the needle tube 7 under the action of the elastic collar 3 until the groove 702 of the needle tube 7 completely passes the arc 404 of the stopper 4, and the stopper 4 cannot be snapped into the groove 702 of the needle tube 7, so that the needle tube 7 can be smoothly pulled out without causing a pause and is convenient for clinical use.
Example 2
Referring to fig. 13 and 14, the elastic collar and stopper matching type acupuncture prevention device comprises a catheter holder assembly 1, a needle protection sleeve 2, an elastic collar 3, a stopper 4, a limiting sheet 5, a needle seat 6 and a needle tube 7.
Referring to fig. 14 and 15, the catheter hub assembly 1 comprises a catheter hub 101, a metal wedge 102, a catheter 103, and an isolation plug 104. The difference from embodiment 1 is that the rear end of the side wall of the catheter hub 101 is provided with an anti-slip structure, which is a locking groove 1011 penetrating the side wall of the catheter hub 101 and used for matching with the anti-slip protrusion 403 of the stop block 4 to ensure that the needle shield 2 is connected with the catheter hub 101.
Referring to fig. 16 and 17, the needle protection cover 2 is still provided with a needle through hole 201, an annular positioning groove 202, a positioning plane 203, a sliding groove 204 and a slot 205, which are only slightly different from the dimensions in embodiment 1 and are not described again.
Referring to fig. 16, 18 and 19, the stopper 4 is different from embodiment 1 in that a rear side of the other surface of the stopper 4 facing the outside of the slide groove 204 is provided with a retaining protrusion 403 which is engaged with a locking groove 1011 of the catheter hub 101, and both sides of the stopper 4 are provided with positioning ribs 405 which are engaged with the slide groove 204. The positioning groove 401, the positioning surface 402 and the arc 404 are only different in size and are not described again.
Referring to fig. 16 and 20, the difference between the position-limiting sheet 5 and the embodiment 1 is that a flange 502 is provided along the edge of the stop hole 501 on one side of the position-limiting sheet 5, so as to ensure that one side of the position-limiting sheet 5 is interference-mounted in the slot 205 of the needle shield 2.
The elastic collar 3, the needle seat 6 and the needle tube 7 refer to the embodiment 1.
Referring to fig. 14, the difference in assembly is that the housing portion 601 of the needle hub 6 houses the needle shield 2 and the rear portion of the catheter hub 101 through an internal bore, and the retaining protrusion 403 of the stop 4 is axially retained in the notch 1011 of the catheter hub 101, so that the needle shield 2 remains well connected to the catheter hub 101 without external forces. Assembly description of other components refer to example 1.
Referring to fig. 21, the needle stick prevention device enters a self-destruction state, which is different in that when the stopper 4, which is not supported by the needle tube 7, slides toward the inside of the slide groove 204 of the needle shield 2 by the elastic restoring force of the elastic collar 3, the retaining protrusion 403 of the stopper 4 is disengaged from the notch 1011 of the catheter hub 101, the anti-separation function between the stopper 4 and the catheter hub 101 is disabled, and the catheter hub assembly 1 is separable as a whole. The final condition of the catheter hub assembly 1 after detachment is shown in figure 22.
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 (10)

1. An elastic collar and stopper fitting type anti-needle-stick device, comprising:
the rear end of the conduit seat component is provided with an anti-falling structure;
the needle protection sleeve is internally provided with a needle through hole which is communicated along the axis, the front part of the needle protection sleeve is arranged from the rear end of the catheter seat assembly, the front end of the outer wall of the needle protection sleeve is provided with a sliding chute, the sliding chute divides the front end of the needle through hole into two sections, the rear end of the outer wall of the needle protection sleeve is provided with a slot, and the slot divides the rear end of the needle through hole into two sections;
the elastic lantern ring is sleeved at the front end of the outer wall of the needle protection sleeve through elastic deformation and corresponds to the sliding groove in position;
the check block is slidably arranged in the sliding groove of the needle protection sleeve, one surface of the check block facing the sliding groove of the needle protection sleeve is matched with the needle tube, the other surface of the check block facing the outside of the sliding groove of the needle protection sleeve is supported on the inner wall of the elastic lantern ring, and the rear part of the check block is matched with the anti-falling structure of the catheter seat component;
the limiting piece is arranged in the slot of the needle protection sleeve and is provided with a stop hole corresponding to the needle through hole;
a needle stand which is sleeved on the rear part of the needle protection sleeve;
the needle tube penetrates through the catheter seat assembly, the needle through hole of the needle protection sleeve and the stop hole of the limiting sheet and provides support for the stop block, the rear end of the needle tube is fixed in the needle seat, and a convex buckle with the size larger than that of the stop hole of the limiting sheet is arranged at the position, close to the front end, of the outer wall of the needle tube;
the needle base is pulled backwards to drive the needle tube to retreat along the axial direction, when the needle tube retreats to the convex buckle and is blocked by the stop hole of the limiting sheet, the front end of the needle tube retreats to leave the stop block, the stop block loses the support of the needle tube, under the action of the elastic restoring force of the elastic lantern ring, the stop block is separated from the anti-falling structure of the catheter base component and slides towards the inside of the sliding groove of the needle protecting sleeve, so that the stop block blocks the front end of the needle through hole of the needle protecting sleeve to prevent the front end of the needle tube from extending forwards, and the needle protecting sleeve, the stop block and the limiting sheet realize the shielding of,
the needle file continues to be by the rearward pulling, drives spacing piece through the protruding buckle of needle tubing, and then drives needle lag and the last elasticity lantern ring of needle lag and dog and move backward together, when the needle lag is pulled out from the rear end of pipe seat subassembly, realizes separating with the pipe seat subassembly.
2. The anti-acupuncture device of an elastic sleeve ring and a block matched type is characterized in that the anti-falling structure of the catheter holder component is an annular clamping groove which is inwards concave in the circumferential direction at the rear end of the inner wall of the catheter holder, and the back side of the block is provided with a backstop bulge matched with the annular clamping groove of the catheter holder.
3. The anti-needle-stick device of claim 1, wherein the anti-slip structure of the catheter holder assembly is a slot extending through the sidewall of the catheter holder, and the rear side of the other surface of the stopper is provided with a retaining protrusion matching with the slot of the catheter holder.
4. The elastic lantern ring and block matched anti-acupuncture device according to any one of claims 1 to 3, wherein a positioning groove for the elastic lantern ring to be clamped into is arranged on the other surface of the block.
5. A cooperating anti-needle-stick device of claim 3, wherein the stop has a pair of positioning ribs on opposite sides thereof for engaging the grooves of the needle shield.
6. A device according to any of claims 1 to 3 or 5, wherein the stop has locating surfaces on its front, rear or both sides for engaging with the grooves of the needle shield.
7. The needle-stick prevention device of any one of claims 1 to 3 or 5, wherein the outer wall of the needle shield has a circumferential concave annular positioning groove at the front end, the bottom surface of the annular positioning groove has a positioning plane parallel to the axis, the positioning plane has a sliding groove, the sliding groove and the slot are arranged along the radial plane, and the elastic collar is elastically deformed to fit into the annular positioning groove.
8. The apparatus according to any one of claims 1 to 3 or 5, wherein the position-limiting piece is an L-shaped piece, one side of the position-limiting piece is mounted in the slot of the needle shield and has a position-stopping hole, and the other side of the position-limiting piece is disposed on the outer wall of the needle shield.
9. The apparatus according to claim 8, wherein the edge of the stop hole of the stop piece is provided with a flange.
10. The needle-prick preventing device with the matched elastic lantern ring and the stop block according to any one of claims 1 to 3, 5 and 8, wherein a groove communicated with the inner hole is formed at the front end of the needle tube, the side, matched with the needle tube, of the stop block and the front side face of the stop block are in arc transition, when the needle tube retreats past the stop block, one side of the stop block is tightly attached to the outer wall of the needle tube under the elastic restoring force of the elastic lantern ring and is positioned outside the groove of the needle tube, and therefore the needle tube retreats smoothly.
CN202010723705.1A 2020-07-24 2020-07-24 Acupuncture device is prevented to elasticity lantern ring and dog cooperation formula Pending CN111888587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010723705.1A CN111888587A (en) 2020-07-24 2020-07-24 Acupuncture device is prevented to elasticity lantern ring and dog cooperation formula

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010723705.1A CN111888587A (en) 2020-07-24 2020-07-24 Acupuncture device is prevented to elasticity lantern ring and dog cooperation formula

Publications (1)

Publication Number Publication Date
CN111888587A true CN111888587A (en) 2020-11-06

Family

ID=73190088

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010723705.1A Pending CN111888587A (en) 2020-07-24 2020-07-24 Acupuncture device is prevented to elasticity lantern ring and dog cooperation formula

Country Status (1)

Country Link
CN (1) CN111888587A (en)

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