CN104887250B - A kind of disposable safe blood sampling Needlestick prevention device - Google Patents

Abstract

The invention discloses a disposable safe blood collection anti-acupuncture device, which includes a protective shell, including a first accommodating cavity formed by pressing the first upper shell and the head end of the lower shell, and the second upper shell and the lower shell. The second accommodating cavity formed by pressing the tail end of the lower case; the needle holder is movable in the first accommodating cavity formed by the protective shell, the needle holder is a hollow tubular structure, the needle The inner wall of the seat axially passes through the blood collection needle, and the blood collection needle protrudes from the needle seat toward the tail end of the lower housing and enters the second accommodating cavity, and the first accommodating cavity is connected to the second accommodating cavity. The distance between the accommodating cavities is smaller than the length of the needle holder; wherein, the inner wall of the first accommodating cavity is provided with a card platform, and the outer wall of the needle holder is provided with a rib matching the card platform, and the blood collection is completed. Finally, the needle seat drives the blood collection needle to move from the second accommodating cavity to the first accommodating cavity, and when the rib passes through the card table, the blood collection needle completely enters the in the second accommodating cavity.

Description

A disposable anti-acupuncture device for safe blood collection

technical field

The invention relates to a medical device. More specifically, the present invention relates to a disposable anti-needle stick device for safe blood collection.

Background technique

In the existing venous blood collection devices on the market, because the protective shell cannot be completely locked or the needle seat cannot be tightly fitted to the protective shell, the needle tip is exposed after the blood collection is completed. , it is very easy to come into contact with the blood of the blood collector, which will lead to infection of medical staff. If the blood collector suffers from infectious diseases, the consequences will be more serious.

Contents of the invention

It is an object of the present invention to solve at least the above-mentioned disadvantages and to provide at least the advantages which will be described hereinafter.

Another object of the present invention is to provide a disposable anti-acupuncture device for safe blood collection. Through structural improvement, the needle seat is locked to realize self-destruction, so as to improve the recovery safety of the blood collection device.

In order to achieve these objects and other advantages according to the present invention, a disposable safe blood collection anti-needle stick device is provided, comprising:

The protective case includes a first accommodating cavity formed by pressing the head end of the first upper case and the lower case and a second accommodating cavity formed by pressing the second upper case and the tail end of the lower case, The first accommodating cavity and the second accommodating cavity are through cavities with side communication;

The needle holder is movable in the first accommodation cavity formed by the protective shell. The needle holder has a hollow tubular structure. The inner wall of the needle holder axially penetrates the blood collection needle, and the blood collection needle faces downward from the needle holder The tail end of the housing protrudes and enters the second accommodating cavity, and the distance between the first accommodating cavity and the second accommodating cavity is smaller than the length of the needle seat;

Wherein, the inner wall of the first accommodating cavity is provided with a card platform, and the outer wall of the needle seat is provided with a convex edge matching the card platform. After the blood collection is completed, the needle seat drives the blood collection needle to automatically The second accommodating cavity moves toward the first accommodating cavity, and when the convex rib passes through the card table, the blood collection needle completely enters the second accommodating cavity.

During blood collection, the needle seat can be pushed to drive the blood collection needle to move from the first accommodating cavity to the second accommodating cavity, and the blood collection needle is protruded from the second accommodating cavity for blood collection; , pulling the needle seat, driving the blood collection needle to move from the second accommodating cavity to the first accommodating cavity, when the convex edge passes through the card table, the blood collection needle completely enters the In the second accommodating cavity, at this time, the needle seat can no longer move toward the second accommodating cavity, and the blood collection needle is completely blocked, thereby realizing safe self-destruction.

Preferably, wherein, the cross-sections of the first upper case, the second upper case and the lower case are all semi-circular structures; the first upper case and the second upper case A pair of locking protrusions are respectively provided on the contact surfaces of the housing and the lower housing, and a pair of locking grooves are provided on the lower housing corresponding to the locking protrusions. The locking protrusion of the first upper case snaps into the locking slot at the head end of the lower case to form the first accommodating cavity, and the locking protrusion of the second upper case snaps into the locking slot at the tail end of the lower case A second accommodating cavity is formed.

Preferably, an elastic piece protrudes from a side of the first upper casing close to the lower casing, and the elastic piece presses against the needle hub.

Preferably, wherein, the needle base is integrally formed.

Preferably, wherein, the needle seat includes sequentially from the direction of the head end to the direction of the tail end,

The extruding section has a conical hollow structure, and when the rib passes through the card table, the extruding section is interference-fitted into the cavity at the head end of the first accommodating cavity;

The locking section extends axially from the extruding section toward the tail end of the lower casing to form a conical hollow structure;

a base section extending axially from the locking section toward the rear end of the lower casing to form a cylindrical hollow structure;

Wherein, the diameter of the end surface of the base section is smaller than the diameter of the conical bottom surface of the locking section, so as to form a rib structure at the conical bottom surface of the locking section, and the extrusion section, the locking section and the The base segments are coaxial and have the same inner diameter, and the blood collection needle is tightly attached to the inner wall of the needle seat.

Preferably, wherein, the outer wall of the base section is provided with a needle handle for pushing and pulling the needle hub. A slideway is formed between the elastic piece of the needle handle and the lower housing, and the needle handle drives the needle holder to slide along the slideway.

Preferably, wherein, the needle seat is an elastic plastic part.

Preferably, wherein, the card table is in the shape of a barb, including:

The introduction groove is an "eight"-shaped through groove. When the needle holder drives the blood collection needle to move from the second accommodating cavity to the first accommodating cavity, the extrusion section of the needle holder first passes through the the introduction groove, and unidirectionally slide into the barb-shaped slot along the inner wall of the introduction groove;

The tightening groove communicates with the introduction groove, the tightening groove is a cylindrical groove body, the outer diameter of the bottom end of the extrusion section is in close contact with the tightening groove, and the inner diameter of the tightening groove is smaller than the The outer diameter of the conical bottom surface of the locking section;

The deadlocking groove is connected through the tightening groove, and the deadlocking section cannot come out after entering the deadlocking groove through the tightening groove, so as to realize self-destruction.

The needle base adopts elastic plastic parts, and when the locking section passes through the tightening groove, it can shrink slightly, so that it enters the locking groove through the tightening groove and is locked.

The blood collection needle axially passes through the second accommodating cavity, the needle tip of the blood collection needle is protected by the second accommodating cavity, and the needle tip is not touched by a contact person.

The extrusion section is connected with the blood collection bag through a blood collection channel, and the blood collection channel includes a blood collection tube and a pipe joint.

The present invention at least includes the following beneficial effects: 1) Through the cooperation of the locking protrusion and the locking groove, the locking of the first accommodation cavity and the second accommodation cavity is realized, ensuring that the first accommodation cavity and the second accommodation cavity are locked together. 2. The housing cavity cannot be disassembled in a non-violent way, thereby improving the reliability of the device; 2) The locking section adopts a three-dimensional tapered structure, and after sliding into the locking groove in one direction, there is a relatively small gap between the locking section and the locking groove. Large contact area, the locking section is tightly locked by the locking groove, which further improves the safety of blood collection device recovery.

Other advantages, objectives and features of the present invention will partly be embodied through the following descriptions, and partly will be understood by those skilled in the art through the study and practice of the present invention.

Description of drawings

Fig. 1 is a schematic structural view of the disposable safe blood collection anti-acupuncture device of the present invention;

Fig. 2 is a schematic structural view of the first upper casing of the disposable safe blood collection anti-acupuncture device of the present invention;

Fig. 3 is a schematic diagram of the structure of the lower casing of the disposable safe blood collection anti-acupuncture device of the present invention;

Fig. 4 is a schematic diagram of the manufacturing process of the disposable anti-needlestick device for safe blood collection of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

The following drawings show an implementation form according to the present invention, which includes: a disposable safe blood collection anti-needle stick device, including:

The protective case includes a first accommodating cavity formed by pressing the head end of the first upper case and the lower case and a second accommodating cavity formed by pressing the second upper case and the tail end of the lower case, The first accommodating cavity and the second accommodating cavity are through cavities with side communication;

The needle holder is movable in the first accommodation cavity formed by the protective shell. The needle holder has a hollow tubular structure. The inner wall of the needle holder axially penetrates the blood collection needle, and the blood collection needle faces downward from the needle holder The tail end of the housing protrudes and enters the second accommodating cavity, and the distance between the first accommodating cavity and the second accommodating cavity is smaller than the length of the needle seat;

Wherein, the inner wall of the first accommodating cavity is provided with a card platform, and the outer wall of the needle seat is provided with a convex edge matching the card platform. After the blood collection is completed, the needle seat drives the blood collection needle to automatically The second accommodating cavity moves toward the first accommodating cavity, and when the convex rib passes through the card table, the blood collection needle completely enters the second accommodating cavity.

Wherein, the cross-sections of the first upper case, the second upper case and the lower case are all semi-circular structures; A pair of locking protrusions are respectively provided on the contact surface of the lower housing, and a pair of locking grooves are provided on the lower housing corresponding to the locking protrusions.

Wherein, an elastic sheet protrudes from a side of the first upper casing close to the lower casing, and the elastic sheet presses against the needle seat.

Wherein, the needle base is integrally formed.

Wherein, the needle seat includes sequentially from the direction of the head end to the direction of the tail end,

The extruding section has a conical hollow structure, and when the rib passes through the card table, the extruding section is interference-fitted into the cavity at the head end of the first accommodating cavity;

The locking section extends axially from the extruding section toward the tail end of the lower casing to form a conical hollow structure;

a base section extending axially from the locking section toward the rear end of the lower casing to form a cylindrical hollow structure;

Wherein, the diameter of the end surface of the base section is smaller than the diameter of the conical bottom surface of the locking section, so as to form a rib structure at the conical bottom surface of the locking section, and the extrusion section, the locking section and the The base segments are coaxial and have the same inner diameter, and the blood collection needle is tightly attached to the inner wall of the needle seat.

Wherein, the outer wall of the base section is provided with a needle handle for pushing and pulling the needle hub.

Wherein, the needle seat is an elastic plastic part.

Wherein, the card table is barb-shaped, including,

The introduction groove is an "eight"-shaped through groove. When the needle holder drives the blood collection needle to move from the second accommodating cavity to the first accommodating cavity, the extrusion section of the needle holder first passes through the the introduction groove, and unidirectionally slide into the barb-shaped slot along the inner wall of the introduction groove;

The tightening groove is connected with the introduction groove, the tightening groove is a cylindrical groove body, the outer diameter of the bottom end of the extrusion section is in close contact with the tightening groove, and the inner diameter of the tightening groove is smaller than the The outer diameter of the conical bottom surface of the locking section;

The deadlocking groove is connected through the tightening groove, and the deadlocking section cannot come out after entering the deadlocking groove through the tightening groove, so as to realize self-destruction.

One end of the extruded section opposite to the locked section is connected to the blood collection bag through a blood collection channel, and the blood collection channel includes a blood collection tube and a pipe connector.

The needle base is made of plastic.

The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations to the housing and sealing plug of the present invention will be apparent to those skilled in the art.

As mentioned above, according to the present invention, this technology takes measures to protect the needle tip. After the blood collection is completed, as long as the needle tip is retracted to the protection position, the protection device can be activated to block the needle tip so that it cannot move forward unless the entire needle seat is destroyed by force. and needle tip devices. In this way, the safe blood collection operation is achieved, and the health of medical staff is effectively protected.

working principle:

After the blood collection is completed, the hand-held needle handle returns to the position of the upper and lower limit slots formed by the protection device. The protection device is a slightly elastic shrapnel so that the needle handle and needle tip can be retracted. After returning to the limit position, the limit There is a barb-shaped card slot at the center, which cooperates with the barb on the needle seat on the needle point, so that the needle seat is firmly stuck in the limit card slot formed by the cooperation of the protection device, and can no longer move forward. At this time, the tip of the needle point is just wrapped in the needle point protective cover and is not exposed, and can no longer pierce objects, thus forming a harmless anti-acupuncture effect.

Manufacturing process:

The assembly process of the front part of the anti-acupuncture blood collection needle of this patent is not different from that of general blood collection needles, which are basically ①Assembly of the insertion needle and the insertion needle seat ②Assemble the hemostatic sheath of the insertion needle and ③Assembly of the venous needle and the venous needle holder ④The venous needle Assembling the needle tip sheath ⑤ Adhesive extension tube between the insertion needle and the venous needle ⑥ Assembling the anti-acupuncture device ⑦ Product single packaging. So far the whole product assembly process is completed.

Although embodiments of the present invention have been disclosed above, it is not limited to the applications set forth in the specification and examples. It can be fully applied to various fields suitable for the present invention. Additional modifications can readily be made by those skilled in the art. Therefore, the invention should not be limited to the specific details and examples shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (6)

1. The Needlestick prevention device 1. a kind of disposable safe is taken a blood sample, including,

   Containment vessel, including first upper shell and lower house head end the first accommodating cavity for pressing and being formed and second upper shell are with The second accommodating cavity that housing tail end is pressed and formed, the described first accommodating cavity communicate with the described second accommodating cavity for side Cavity；

   Needle stand, movable to be located in the first accommodating cavity that the containment vessel is formed, the needle stand is in hollow tubular structure, described Needle stand inwall axially penetrates through blood taking needle, and the blood taking needle, which stretches out from needle stand towards lower house tail end direction and enters described second, to be held Intracavitary is empty, and the described first accommodating cavity is smaller than the needle stand length with the described second accommodating cavity；

   Wherein, the described first accommodating cavity inner wall is provided with chuck, and the needle stand lateral wall is provided with what is matched with the chuck Fin, after blood sampling terminates, the needle stand drives the blood taking needle to be moved from the described second accommodating cavity to the described first accommodating cavity Dynamic, when the fin is by the chuck, the blood taking needle is completely into the described second accommodating cavity；

   The needle stand includes successively from the head end direction to the tail end direction,

   Extruded segment, tapered hollow structure, when the fin is by the chuck, the extruded segment is in interference fit with described In one accommodating cavity head end cavity；

   Locked section, axially extend to form a conical hollow structure to the lower house tail end direction from the extruded segment；

   Base section, extend to form a cylindrical type hollow structure to the lower house tail end direction from the locked section of axial direction；

   The base section end face diameter is less than the locked section of taper basal diameter, to be formed at the locked section of taper bottom surface One fin structure, the extruded segment, locked section and the base section coaxial line and internal diameter are identical, and the blood taking needle tightly pastes Together in the needle stand inwall；

   The chuck is in barb type, including,

   Lead-ingroove, in "eight" shape groove, the needle stand drives the blood taking needle to house cavity to described first from described second During accommodating cavity movement, the needle stand extruded segment unidirectionally slips into institute first by the lead-ingroove along the lead-ingroove inwall State in barb type neck；

   Groove is tightened up, is penetrated with the lead-ingroove, the groove of tightening up is in cylindrical type cell body, extruded segment bottom external diameter and the receipts Tight groove is close to, and the groove internal diameter of tightening up is less than locked section of taper bottom surface external diameter；

   Locked groove, with it is described tighten up groove insertion be connected, described locked section tightened up described in groove enter the locked groove after can not take off Go out, realize self-destruction.
2. The Needlestick prevention device 2. disposable safe as claimed in claim 1 is taken a blood sample, wherein, the first upper shell, described second The cross section of upper shell and the lower house is in semicircle ring structure；The first upper shell and the second upper shell with it is described A pair of locked projections are respectively equipped with the contact surface of lower house, are accordingly provided with a pair with the locked projection on the lower house Locked neck.
3. The Needlestick prevention device 3. disposable safe as claimed in claim 2 is taken a blood sample, wherein, the first upper shell is under described A flexure strip is stretched out in housing side, and the flexure strip compresses the needle stand.
4. The Needlestick prevention device 4. disposable safe as claimed in claim 3 is taken a blood sample, wherein, the needle stand is formed in one structure.
5. The Needlestick prevention device 5. disposable safe as claimed in claim 4 is taken a blood sample, wherein, the base section outer wall, which is provided with, to be used to push away Draw the needle handle of the needle stand.
6. The Needlestick prevention device 6. disposable safe as claimed in claim 5 is taken a blood sample, wherein, the needle stand is elastic plastic.