CN109316193B

CN109316193B - Disposable micro negative pressure blood sampling and taking device

Info

Publication number: CN109316193B
Application number: CN201811163814.1A
Authority: CN
Inventors: 王建美
Original assignee: Zhuhai Kanglilai Medical Instrument Co ltd
Current assignee: Zhuhai kanglilai Medical Instrument Co.,Ltd.
Priority date: 2018-10-02
Filing date: 2018-10-02
Publication date: 2021-07-16
Anticipated expiration: 2038-10-02
Also published as: CN109316193A

Abstract

The invention relates to the technical field of medical blood sampling instruments, and provides a disposable micro negative pressure blood sampler which mainly comprises an outer sleeve, a negative pressure container, a top pressing ring and a blood sampling needle, wherein a cavity is formed in the negative pressure container and is in a vacuum or negative pressure state, the top pressing ring is a control part and is used for triggering a spring arranged in the outer sleeve, so that water stains drive the blood sampling needle to move downwards to penetrate into skin, a rubber body is arranged between the blood sampling needle and the negative pressure container, the rubber body is a key part, the blood sampling needle is different from the negative pressure container when in an upper position through the arrangement of an inner channel, the blood sampling needle is communicated with the negative pressure container once moving downwards to penetrate into the skin, the cavity in the vacuum or negative pressure state in the negative pressure container automatically sucks blood, and a piston disc arranged in the negative pressure container can extrude the blood to achieve.

Description

Disposable micro negative pressure blood sampling and taking device

Technical Field

The invention relates to the technical field of medical blood sampling instruments, in particular to a disposable micro negative pressure blood sampling and taking device.

Background

Blood detection is the most common disease diagnosis method, various diseases of human body can be reflected basically through various indexes of blood, a disposable vacuum blood collector is generally adopted by medical staff, a blood collecting needle is inserted into a vein of the human body, the blood automatically flows into a blood collecting bottle due to the negative pressure influence in the blood collecting bottle, the method is most commonly used when quantitative blood collection is needed, but the blood collection is inconvenient for users to use by themselves, the medical staff is required to carry out professional operation, inconvenience is brought to quick diagnosis, along with the development of the latest disease diagnosis technology, a plurality of infectious diseases can be self-detected under the condition of obtaining a small amount of blood, the users can conveniently and quickly judge the diseases such as AIDS, syphilis, hepatitis B and the like, the operation flow is simple, the test paper form is generally adopted, the small amount of blood is dripped into a test paper detection part, and the result can be read after a period of time, this requires a means for the user to draw blood on his or her own.

The utility model discloses a disposable automatic blood sampling device in the chinese utility model patent of grant notice No. CN201394021Y, this blood sampling device structure is comparatively simple, possess certain automatic execution effect, hold power release form with the blood taking needle and pierce skin with certain dynamics fast through the spring, obtain the blood sampling effect, but this product can not obtain the effect of getting blood, only punctures skin, let blood gush out by oneself (need the user to extrude with the hand even, bring obvious pain), still need instil into the detection position with the help of other instruments with blood absorption.

The invention discloses a vacuum auxiliary type blood collector in Chinese patent with application publication No. CN107212892A, which adopts the mode that a blood collection needle is punctured into skin to collect blood, and a vacuum cavity is arranged on a blood collection device, so that the skin is affected by negative pressure after being punctured in the blood collection process to promote outflow and obtain collection.

Further, as disclosed in international patent application publication No. CN102802525A, a vacuum blood collection tube is also provided with a vacuum cavity for negative pressure blood collection, and the blood is respectively inserted into the skin vein and the vacuum cavity in the form of a double-edged needle, so as to form a channel for the blood to flow into the vacuum cavity.

Disclosure of Invention

Technical problem

Related to the prior art, the disposable blood taking device has to require convenient operation, and meanwhile, a compact structure is ensured, so that the consumption of manufacturing materials is reduced, the manufacturing cost is reduced, and the popularization purpose of disposable use can be achieved.

Accordingly, the primary object of the present invention is to provide a disposable blood sampling device with convenient operation, which maintains a compact and compact structure, has a low manufacturing cost, is suitable for mass production and batch use, has a fast and continuous blood sampling process to alleviate pain, has few operation steps, is convenient for a user to use, and can directly take out a collected blood sample.

The invention is suitable for personal self-test, such as test paper detection of blood type, transaminase, hepatitis B, AIDS and the like.

The disposable micro negative pressure hemospast provided by the invention comprises an outer sleeve positioned at the outermost side, a negative pressure container positioned above the inner part of the outer sleeve, and a top pressure ring positioned below the inner part of the outer sleeve, wherein the outer sleeve and the negative pressure container are both in cylindrical tubular structures, an inner cavity is arranged in the outer sleeve, the bottom of the outer sleeve is in a hollow state, the upper part of the negative pressure container is fixedly arranged at the first upper end part of the outer sleeve, the central axes of cylinders of the outer sleeve and the negative pressure container are positioned at the same straight line, two symmetrical and vertically arranged limiting strips are arranged on the inner wall of the outer sleeve, the upper end parts of the limiting strips are connected and fixed on the inner wall of the outer sleeve through connecting strips, the first lower end parts of the limiting strips at two sides are abutted against the second upper end part of the top pressure ring, the second upper end part of the top pressure ring is positioned between the inner sides of the first lower end, on the contrary, the outer diameter of the bottom end of the top pressing ring is larger than the distance between the first lower end parts of the limiting strips at the two sides in a natural state, the top pressing ring vertically moves upwards to be capable of spreading the limiting strips at the two sides to increase the distance between the limiting strips, and the outer side wall of the middle area of the top pressing ring is provided with a circle of bearing ring I, the inner side wall of the bottom of the outer sleeve is provided with a circle of corresponding bearing ring II, the outer diameter of the bearing ring I is larger than the inner diameter of the bearing ring II and the bearing ring I is positioned above the bearing ring II, so that the bearing ring II can bear the bearing ring I, the inner walls of the middle same area of the limiting strips symmetrically arranged at the two sides are provided with limiting convex blocks, a trigger disc is arranged between the limiting convex blocks and is an annular object with a certain thickness, and a cylindrical through cavity is arranged in the central area of the trigger disc, the outer diameter of the trigger disc is smaller than the inner diameter of the top pressing ring, the inner diameter of the top pressing ring is consistent from top to bottom, the trigger disc can penetrate through the inner part of the top pressing ring when moving downwards, the inner side walls of the limiting lugs on the limiting strips are provided with latch teeth, correspondingly, latch tooth depressions corresponding to the latch teeth are arranged at the corresponding positions on the two sides of the outer wall of the trigger disc, the latch tooth depressions are in a depression state, the latch can be correspondingly clamped in the latch recess so that the trigger plate is fixed on the limit bump, the trigger plate is not movable in the state, when the jacking ring pushes the limiting strips at the two sides upwards, the distance between the limiting strips is increased, the latch is separated from the latch recess, therefore, when the top pressing ring is pushed upwards to a certain state, the triggering disc loses the limiting fixation of the clamping teeth and can be separated from downward movement, and the triggering disc is part of the trigger mechanism of the blood sampler.

In addition, the negative pressure container is arranged above the trigger disc, the outer diameter of the negative pressure container is smaller than that of the trigger disc, the negative pressure container is a shell-shaped object, a cylindrical cavity is arranged in the negative pressure container, the inner wall of the negative pressure container is in a smooth state, a top cover and a bottom cover are arranged above and below the negative pressure container, the edges of the top cover and the bottom cover and the upper side edge and the lower side edge of the negative pressure container are in a sealed state, penetrating fine holes are symmetrically arranged on the bottom cover opposite to the circle center of the bottom cover, and a rubber body is fixedly arranged on the lower end face of the bottom cover, which is one key of the invention, the rubber body is composed of an upper part and a lower part, which are respectively composed of a part I with an inverted circular truncated cone shape and a part II with a cylindrical shape, the part I and the part II are in an integrated state, and are only described separately for the convenience of the invention description, and the rest parts except the fine hole parts between, two first blood circulation grooves are arranged inside the first part, the two first blood circulation grooves are symmetrical relative to the central axis of the first part, the bottoms of the two first blood circulation grooves are close to each other, the tops of the two first blood circulation grooves are separated from each other, the top ends of the two first blood circulation grooves penetrate through the upper surface of the first part and are respectively communicated with symmetrical fine holes on the bottom cover, second blood circulation grooves are arranged at the central axis positions of the second part and the first part, the second blood circulation grooves are communicated with the second blood circulation grooves at the central axis position of the first part, the two blood circulation grooves are combined into one blood circulation groove, the essence of the blood circulation groove is also one, only the first part and the second part are separately described, the bottom ends of the second blood circulation grooves penetrate through the lower surface of the second part, the top ends of the second blood circulation grooves are close to the upper surface of the first part but do not penetrate through the upper surface of the first part, and the lower ends of the two blood circulation grooves are communicated, so that the first blood vessel through groove and the second blood vessel through groove are in a communicated state.

The blood taking needle is a tubular needle body, a tube groove cavity through which blood can flow is formed in the blood taking needle, the bottom end of the blood taking needle is in a sharp state, the bottom end of the blood taking needle can pierce the skin of a human body, the top end of the blood taking needle is in a flat opening state, the outer diameter of the blood taking needle is equal to the inner diameter of the second blood through tube groove, the upper end part of the blood taking needle is inserted into the second blood through tube groove, the outer wall of the upper end part of the blood taking needle is tightly attached to the inner wall of the second blood through tube groove, the upper end part of the blood taking needle is inserted into the second blood through tube groove; when the top end of the blood taking needle is inserted into the blood through groove II at one part, the communication part between the blood through groove I and the blood through groove II is blocked by the blood taking needle and cannot be communicated, and when the top end of the blood taking needle is only inserted into the blood through groove II at one part, the blood taking needle is communicated with the blood through groove I in the state.

The lower end area of the blood taking needle is fixedly provided with a pressing disc which is a circular disc-shaped object, the blood taking needle is positioned at the circle center of the pressing disc, the needle point position of the bottom end of the blood taking needle is positioned below the pressing disc, the pressing disc is positioned below the triggering disc, the pressing disc and the triggering disc are in a relatively parallel state, and meanwhile, the outer diameter of the pressing disc is smaller than the inner diameter of the pressing disc.

The upper part of the trigger disc is provided with a spring, the outer diameter of the spring is smaller than that of the trigger disc, but the inner diameter of the spring is larger than that of the negative pressure container, the upper part area of the spring is sleeved on the negative pressure container, the top end of the spring is abutted against the lower end face of the upper end part I of the outer sleeve, the bottom end of the spring is abutted against the upper end face of the trigger disc, because the position of the upper end part I of the outer sleeve is relatively fixed, the spring is pushed upwards to extrude the trigger disc to form an extrusion, so that the spring obtains elastic force storage, when the trigger disc is fixed at the latch position of the bump, the spring is in an extruded state and has elastic force storage, once the pressing ring pushes upwards to prop the limiting strips at two sides open, the trigger disc loses fixation, the spring can instantly press the trigger disc downwards, the trigger disc is a triggering process of the triggering mechanism, the instant downwards moving of the trigger disc can impact the pressing disc to enable the blood taking needle fixed with the pressing, and the trigger disc is in collision contact with the jacking disc when downwards contacted with the jacking disc, so that the blood taking needle can downwards puncture the skin more powerfully.

The inside of negative pressure container is provided with the piston dish, the external diameter of piston dish equals the internal diameter of the inside cylindrical cavity of negative pressure container, the outer lane wall of piston dish hugs closely on the inner wall of negative pressure container and the piston dish can reciprocate along the inside cylindrical cavity of negative pressure container, the outer lane wall of piston dish adopts rubber material to make, its inner wall contact site with the negative pressure container can reach encapsulated situation, adopt evacuation processing or negative pressure processing in the inside lower part cavity that is in the piston dish below of negative pressure container, in case the blood taking needle moves down, after leading to the blood vessel groove one and blood taking needle intercommunication, the lower part cavity of negative pressure container can communicate with the blood taking needle, the blood taking needle bottom is pierced under skin this moment, and the lower part cavity is vacuum or negative pressure state, blood in the capillary vessel can be sucked to the negative pressure container under the skin by the influence of pressure.

The fixed piston rod that is provided with vertical setting of up end of piston dish, the top cap that the piston rod partly passed negative pressure container is in the top of top cap, and has the hole that can supply the piston rod to pass on the top cap, thereby the piston rod can reciprocate to push the piston dish relatively to the top cap, and the top of piston rod is provided with the pressure dish, makes things convenient for the finger to press the pressure dish and push piston rod and piston dish.

In addition, the two sides of the piston rod are provided with limiting blocks which are symmetrically arranged, the distance between each limiting block and the piston disc is larger than the thickness of a top cover of the negative pressure container, through openings corresponding to the limiting blocks are formed in the two sides of the piston rod, the limiting blocks on the two sides of the piston rod can penetrate through the through openings when being adjusted to a certain position, under the state, the limiting blocks do not influence the up-and-down movement of the piston rod, when the limiting blocks and the through openings are in a staggered state, the limiting blocks cannot penetrate through the top cover through the through openings, and when the limiting blocks are located on the upper side of the top cover and the limiting blocks and the through openings are in.

After blood sampling is finished, the piston rod is only required to be rotated to enable the limiting block to correspond to the through hole, the limiting block can pass through the through hole, the piston rod can push the piston disc downwards, and blood in the cavity at the lower part of the negative pressure container can be extruded.

Advantageous effects of the invention

The operation process of the invention is continuous, only need to support the bottom of the top pressure ring against the surface of the finger or limb skin to press, the trigger mechanism will be started accordingly, keep the pressing state of the hemostix, the blood sampling will be finished automatically, then only need to rotate the piston rod or the pressing plate when needing to take out the blood sample, the position is adjusted to push the piston rod and the piston plate to extrude the blood sample, the operation steps of the whole process are less, the operation is convenient, no other apparatus is needed, and the time of the blood sampling process is short, thus effectively reducing the pain feeling and pain times of users.

As the improvement, the outer side wall of the rubber body is wrapped by the metal shell sleeve, so that the inner substance of the rubber body is more compact, and the inner diameter of the blood vessel passing groove II is prevented from being enlarged due to outward expansion.

As aforementioned improvement, the fixed vertical anticreep pole that is provided with on the up end of top pressure disk, it is provided with the through hole to correspond the position on the trigger dish, the through hole that corresponds is passed on the upper portion of anticreep pole and the top department of anticreep pole is more than the trigger dish up end, be provided with the card strip of horizontal setting on the top of anticreep pole, the same card strip also is in more than the trigger dish up end to the length of card strip is greater than the internal diameter of through hole, and the card strip can be restricted more than the trigger dish up end always like this, and the falling of anticreep pole can be restricted to the card strip, is triggering under the condition that the dish is in fixed state, can restrict the whereabouts of top pressure disk and blood taking needle, prevents to break away from the.

As an improvement, the outer diameter of the pressing plate is equal to or larger than that of the trigger plate, so that the trigger plate is prevented by the pressing plate from being detached from the falling position and a user cannot fix the trigger plate on the latch again by hands.

As the improvement, the upper end face of the top cover of the negative pressure container is provided with dents corresponding to the limiting blocks on two sides opposite to the piston rod, and when the limiting blocks on two sides of the piston rod are adjusted to a certain position, the bottom of the limiting block is sunk into the dents, so that the piston rod is prevented from rotating randomly.

As the improvement, the length of the part of the blood taking needle below the pressing plate is smaller than that of the second blood through channel, so that the situation that the blood taking process is invalid due to the fact that the top end of the blood taking needle is separated from the second blood through channel when the blood taking needle penetrates into the skin downwards is prevented.

As the improvement, the upper end edge of the trigger disc is provided with the arc chamfer, so that the trigger disc is easily placed between the limiting lugs in the production process.

As the improvement, the detachable protective cap is arranged at the bottom of the outer sleeve, the protective cap can be sleeved at the bottom of the outer sleeve in a threaded fixing or clamping fixing mode, a bottom sealing exists at the bottom of the protective cap, the height formed inside the protective cap is larger than the maximum distance of the jacking ring extending out of the outer sleeve, the protective cap can be sleeved at the bottom of the outer sleeve to prevent the jacking ring from being touched and pushed upwards to open the device triggering mechanism, and the protective cap can be removed when the device triggering mechanism is used.

Drawings

Fig. 1 is an overall external perspective view of the present invention.

Fig. 2 is an overall sectional structural view of the present invention.

Fig. 3 is a schematic overall sectional structure view from another perspective of the present invention.

Fig. 4 is an exploded view of the components of the present invention.

FIG. 5 is a schematic cross-sectional view of the present invention before use.

FIG. 6 is a schematic cross-sectional view of the trigger-operated device of the present invention.

Fig. 7 is a partially enlarged cross-sectional view of the negative pressure container portion of the present invention.

FIG. 8 is a partial enlarged sectional view schematically showing a rubber body part before use and a lancet moving down after use.

FIG. 9 is a cross-sectional structural view showing the state of the blood sampling operation according to the present invention.

Fig. 10 is an overall sectional structural view of a modified embodiment of the present invention.

Fig. 11 is a schematic cross-sectional structure of a modified embodiment of the present invention.

Detailed Description

Specific embodiments and implementations of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 2 and 3, the present invention specifically comprises the following components: the device comprises an outer sleeve 10, a negative pressure container 20, a jacking ring 30, a limiting strip 40, a trigger disc 50, a rubber body 60, a blood taking needle 70, a jacking disc 71, a spring 80, a piston disc 90, a piston rod 91 and a pressing disc 92. Wherein, the outer sleeve 10 is located at the outermost side to wrap the whole component, an internal cavity is formed inside the outer sleeve, the bottom of the outer sleeve is hollow, that is, the bottom of the outer sleeve is uncovered, two symmetrical limiting strips 40 are arranged on the inner wall of the outer sleeve 10, the limiting strips 40 are vertically arranged, the upper end parts of the limiting strips are fixedly connected with the inner wall of the outer sleeve 10 through connecting strips 41, limiting convex blocks 43 are arranged on the inner wall of the same area in the middle of the outer sleeve, the trigger disc 50 is arranged between the limiting convex blocks 43, the trigger disc 50 is an annular object with a certain thickness, a cylindrical cavity is formed in the central area of the trigger disc 50, latch teeth 44 are arranged on the inner side wall of the limiting convex blocks 43, latch tooth recesses 51 corresponding to the latch teeth 44 are arranged at corresponding positions on the two sides of the outer wall of the trigger disc 50, the latch tooth recesses 51 are in a recessed state, the, in this state, the trigger plate 50 is immovable, and the pressing ring 30 is disposed at the bottom of the outer sleeve 10.

As can be seen from the figure, the lower end parts one 42 of the limiting strips 40 abut against the upper end parts two 31 of the top pressing ring 30, so that the upper end parts two 31 of the top pressing ring 30 are positioned between the inner sides of the lower end parts one 42 of the limiting strips 40 at two sides, because the outer diameter of the top end of the top pressing ring 30 is smaller than the distance between the lower end parts one 42 of the limiting strips 40 at two sides in the natural state, and the outer diameter of the bottom end of the top pressing ring 30 is larger than the distance between the lower end parts one 42 of the limiting strips 40 at two sides in the natural state, so that the outer diameter between the lower end parts one 42 of the limiting strips 40 is larger and larger when the top pressing ring 30 moves upwards, the limiting strips 40 at two sides are spread, the distance between the limiting strips is increased suddenly, the latch 44 is separated from the latch recess 51, and the trigger disc 50 loses the limiting fixation of the latch 44 and can be separated from moving downwards when the top, the inner diameter of the trigger plate 50 is consistent from top to bottom, the outer diameter of the trigger plate 50 is smaller than the inner diameter of the pressing ring 30, the trigger plate 50 can penetrate through the inner part of the pressing ring 30 when moving downwards, in addition, the spring 80 is arranged in the outer sleeve 10, and the upper end and the lower end of the spring are pressed between the first upper end part 11 of the outer sleeve 10 and the trigger plate 50.

Referring to fig. 5 and 6, the trigger mechanism of the present invention is illustrated in fig. 5, wherein the latch 44 fixes the trigger plate 50, which is in a state before use, and the pressing ring 30 is pushed upward (by pushing the skin of the limb) to open the position-limiting strip 40 and separate the latch 44 from the latch recess 51, before use, the spring 80 is in a state of accumulating force, the trigger plate 50 is instantly fixed, and the spring 80 pushes the trigger plate rapidly downward, as shown in fig. 6, to complete the subsequent acupuncture.

A circle of first bearing rings 32 are arranged on the outer side wall of the approximately middle area of the top pressure ring 30, a circle of corresponding second bearing rings 12 are arranged on the inner side wall of the bottom of the corresponding outer sleeve 10, the outer diameter of the first bearing rings 32 is larger than the inner diameter of the second bearing rings 12, the first bearing rings 32 are located above the second bearing rings 12, the first bearing rings 32 are limited by the second bearing rings 12 and cannot fall down, the top pressure ring 30 fixed with the first bearing rings 32 is located at a certain position and cannot fall down, and the top pressure ring 30 is always located at the bottom of the outer sleeve 10, so that the top pressure ring is prevented from falling off in the packaging and transporting process.

It can be seen from the figure that the negative pressure container 20 is arranged above the inner part of the outer sleeve 10, the outer wall of the negative pressure container 20 is fixedly arranged at the first 11 part of the upper end part of the outer sleeve 10, the outer sleeve 10 and the central axis of the cylinder of the negative pressure container 20 are in the same line, the outer diameter of the negative pressure container 20 is smaller than that of the trigger plate 50 (the arrangement is that the spring can be sleeved on the negative pressure container, and the outer diameter of the spring is smaller than that of the trigger plate 50), the negative pressure container 20 is a shell-shaped object, a cylindrical cavity is arranged in the negative pressure container 20, and the.

Fig. 7 is a partial enlarged cross-sectional view of a portion of the negative pressure container 20, wherein a top cover 21 and a bottom cover 22 are arranged above and below the negative pressure container 20, the edges of the top cover 21 and the bottom cover 22 and the upper and lower side edges of the negative pressure container 20 are in a sealed state, two sides of the bottom cover 22 opposite to the center of the circle are symmetrically provided with penetrating fine holes 23, and a rubber body 60 is fixedly arranged on the lower end surface of the bottom cover 22, which is one of the keys of the present invention, wherein the rubber body 60 is divided into an upper part and a lower part, which are respectively a part 61 with an inverted circular truncated cone shape and a part 62 with a cylindrical shape.

Fig. 8 is a partially enlarged illustration of two states of the rubber body 60, wherein a first part 61 and a second part 62 of the rubber body 60 are integrated, and are only described separately for convenience of description of the present invention, the upper end surface of the first part 61 and the lower end surface of the negative pressure container 20 are fixedly connected in a sealing manner except for the position of the small hole 23, two first blood vessel access grooves 63 are arranged inside the first part 61, the two first blood vessel access grooves 63 are symmetrical with respect to the central axis of the first part 61, the bottoms of the two first blood vessel access grooves are close to each other, the tops of the two first blood vessel access grooves 63 penetrate through the upper surface of the first part 61 and are respectively communicated with the symmetrical small holes 23 on the bottom cover 22, two blood vessel access grooves 64 in a communicating state are arranged at the central axis positions of the second part 62 and the first part 61, and the bottoms of the two blood vessel access grooves 64 penetrate through the lower surface of the second part 62, the top end of the first blood vessel through groove 64 is close to the upper surface of the first blood vessel through groove 61 but does not penetrate through the upper surface, and the lower ends of the first blood vessel through groove 63 are communicated with the approximately middle area of the second blood vessel through groove 64, so that the first blood vessel through groove 63 and the second blood vessel through groove 64 are in a communicated state.

The upper end part of the blood taking needle 70 is inserted into the second blood through-channel 64, the upper end part of the blood taking needle 70 can move up and down along the second blood through-channel 64, the blood taking needle 70 is a tubular needle body, a tube channel cavity which can be used for allowing blood to flow through is formed in the blood taking needle 70, the bottom end of the blood taking needle is in a sharp state and can pierce the skin of a human body, the top end of the blood taking needle is in a flat mouth state, the outer diameter of the blood taking needle 70 is equal to the inner diameter of the second blood through-channel 64, the outer wall of the blood taking needle is tightly attached to the inner wall of the second blood through-channel 64 after the upper end part of the blood taking; when the tip end of the lancet 70 is inserted into the second blood flow channel 64 in the portion 61, the communication portion between the first blood flow channel 63 and the second blood flow channel 64 is blocked by the lancet 70 and cannot communicate with each other, and when the tip end of the lancet 70 is inserted into only the second blood flow channel 64 in the portion 62, the lancet 70 communicates with the first blood flow channel 63 in this state.

Fig. 8 shows a downward movement change of the blood collection needle 70, and in an initial state, the top end of the blood collection needle 70 is inserted into the top end of the first blood circulation groove 64, the communication part of the first blood circulation groove 63 and the second blood circulation groove 64 is blocked by the needle body of the blood collection needle and cannot be communicated with each other, the internal cavity of the negative pressure container in this state cannot be communicated with the blood collection needle, and after the blood collection needle moves downward for a certain distance in the blood collection operation process, when the top end of the blood collection needle moves to the position below the communication part of the first blood circulation groove and the second blood circulation groove, the blood collection needle is a tubular needle body which is communicated with each other up and down, the first blood circulation groove and the second blood collection needle in this state are communicated with each other, the internal cavity of the negative pressure container is also communicated with the blood collection needle to form a blood circulation channel, and.

The lower end area of the blood taking needle 70 is fixedly provided with a top pressing plate 71, the top pressing plate 71 is a disc-shaped object with a circle center, the blood taking needle 70 is arranged at the circle center of the top pressing plate 71, the needle tip part of the bottom end of the blood taking needle 70 is arranged below the top pressing plate 71, the top pressing plate 71 is arranged below the trigger plate 50, the top pressing plate 71 and the trigger plate 50 are in a relatively parallel state, and meanwhile, the outer diameter of the top pressing plate 71 is smaller than the inner diameter of the top pressing ring 30.

As shown in fig. 6, once the trigger mechanism is opened, the trigger plate 5 is released from being fixed, the spring with a certain power above the trigger plate can instantaneously push the trigger plate 50, and the pressing plate 71 is located below the trigger plate 50, the trigger plate 50 moves downwards to impact the pressing plate 71 to drive the lancet 70 to move downwards, so as to complete the blood collection action, wherein the purpose of arranging the cylindrical cavity at the center of the trigger plate 50 is to prevent the rubber body 60 and the lancet 70 from passing through the cylindrical cavity in time; the striking force is obvious in the process that the trigger plate 50 strikes the fixed pressure plate 71 to move downwards, so that the blood taking needle can more powerfully pierce the skin of the limb to complete the blood taking action when moving downwards.

The piston disc 90 is arranged in the negative pressure container 20, the outer diameter of the piston disc 90 is equal to the inner diameter of the cylindrical cavity in the negative pressure container 20, the outer ring wall of the piston disc 90 is tightly attached to the inner wall of the negative pressure container 20 and the piston disc 90 can move up and down along the cylindrical cavity in the negative pressure container 20, the outer ring wall of the piston disc 90 is made of rubber, the contact part of the inner walls of the rest negative pressure containers 20 can reach a sealing state, the lower cavity 24 (see figure number in figure 6) in the negative pressure container 20 below the piston disc 90 adopts vacuum pumping treatment or negative pressure treatment, once the blood taking needle 70 moves downwards, the blood in the capillary vessel I63 is communicated with the blood taking needle 70, the lower cavity 24 of the negative pressure container 20 is communicated with the blood taking needle 70, the bottom end of the blood taking needle penetrates under the skin, the lower cavity 24 is in a vacuum or negative pressure state, the blood in the capillary vessel under the skin can, the blood sampling process is completed.

The upper end face of the piston disc 90 is fixedly provided with a vertically arranged piston rod 91, a part of the piston rod 91 penetrates through the top cover 21 of the negative pressure container 20 and is positioned above the top cover 21, a hole for the piston rod 91 to penetrate through is formed in the top cover 21 (namely, the piston rod 91 can penetrate through the hole, and the hole is not required to be sealed), the piston rod 91 can move up and down relative to the top cover 21 so as to push the piston disc 90, and the top end of the piston rod 91 is provided with a pressing disc 92, so that the piston rod 91 and the piston disc 90 can be conveniently pushed by pressing the pressing disc 92 with fingers.

In addition, the piston rod 91 is provided with symmetrically arranged limit blocks 93 at both sides (in fig. 2, the position of the limit block 93 is not shown due to the cut-away view, see the orientation views of fig. 1 and fig. 3), the distance between the limit block 93 and the piston disc 90 is larger than the thickness of the top cover 21 of the negative pressure container 20 (because the piston disc 90 is located below the top cover 21 and the limit block 93 is located above the top cover 21 in the initial state), and the top cover 21 is provided with through holes 25 corresponding to the limit blocks 93 at both sides opposite to the piston rod 91, the limiting blocks 93 at two sides of the piston rod 91 can pass through the through hole 25 when being adjusted to a certain position, in this state, the limiting blocks 93 do not influence the up-and-down movement of the piston rod 91, when the limiting block 93 and the through hole 25 are in a dislocation state, the limiting block 93 cannot pass through the top cover 21 through the through hole 25, when the limit block 93 is located on the upper side of the top cover 21 and the limit block 93 and the through hole 25 are in a dislocation state, the piston rod 91 is limited to a position and cannot move downwards.

After blood collection is finished, only the piston rod 91 needs to be rotated to enable the position of the limiting block 93 to correspond to the position of the through hole 25, the limiting block 93 can pass through the through hole 25, the piston rod 91 can push the piston disc 90 downwards, and blood in the cavity 23 at the lower part of the negative pressure container 20 can be squeezed out.

Similarly, when the present invention is assembled, the piston disc 90 and the piston rod 91 can be inserted into the negative pressure container 20, the piston disc 90 is inserted into the bottom of the negative pressure container 20, then the upper end of the blood taking needle 70 is inserted into the second blood through channel 64 and inserted into the top end of the second blood through channel 64, the second blood through channel 64 and the first blood through channel 63 are blocked, the piston disc 90 can vacuumize the negative pressure container 20 by pulling the piston rod 91 upwards, so that the lower cavity 24 of the negative pressure container 20 is in a negative pressure state, and a special vacuum pumping device can be omitted from the operation flow to vacuumize the negative pressure container 20; when the piston rod 91 is pulled up to the limit block 93 and passes through the through hole 25 to be positioned above the top cover 21, the piston rod 91 can be rotated to enable the piston rod 91 and the through hole 25 to be staggered, the limit block cannot move downwards, the piston rod 91 is also fixed in the position state, the negative pressure container 20 can be kept in a negative pressure state, the whole operation flow is quick and simple, and the assembly line machining is suitable.

The specific operation method of the invention comprises the following steps:

holding the outer wall of the outer sleeve 10 by fingers, enabling the lower end of the jacking ring 30 to be close to the skin of fingers or limbs, keeping the blood sampler vertical to the surface of the skin relatively, pressing the blood sampler downwards, and pulling out the blood sampling needle 70 after the blood sampling needle is inserted into the skin for 1-2s, so that the blood sampling action is finished; when the hemostix is pressed, the jacking ring 30 is pushed upwards by skin and the limiting strips 40 are opened, then the triggering plate 50 loses fixation, the spring 80 instantly pushes the triggering plate 50 to collide with the jacking plate 71 and push the blood taking needle 70 to be downwards inserted into the skin, the blood taking needle 70 is downwards and simultaneously communicated with the first blood through groove 63, the lower cavity 24 of the negative pressure container 20 is communicated with capillary vessels under the skin through the first blood through needle 70, the first blood through groove 63 and the fine holes 23, the blood in the capillary vessels can be instantly sucked when the lower cavity 24 is in a negative pressure state, a certain amount of blood samples can be collected within 1-2 days, and usually only a plurality of drops of blood samples can be collected.

As shown in fig. 9, when blood is taken, the piston rod 91 is pushed downward by rotating the piston rod 91 so that the position of the stopper 93 corresponds to the through hole 25, the piston disc 90 presses the blood in the negative pressure container 20 so that the blood is pushed out from the lower end of the lancet 70, and the blood dropping from the lower end of the lancet 70 can be used for test paper detection.

It can be seen from the above operation that the blood collection needle 70 can automatically complete the blood collection operation only by once pricking and staying for a short time without manual other operations (such as blood extrusion, piston pushing, other blood collection devices insertion, etc.), the pain time and the pain times are greatly shortened, meanwhile, the blood collection process can be extruded for detection only by rotating the piston rod 91 and pushing without opening the device of the present invention without other blood collection equipment (such as a straw, a dropper, etc.), and the whole operation process is rapid and convenient.

In addition, compared with the prior art in which a vacuum negative pressure blood sampling method is adopted, the general method for communicating the blood sampling needle is that two ends of the blood sampling needle are both set to be sharp (or other similar forms, such as a flexible tube is communicated between two needles), one end of the needle is inserted into skin or a blood vessel, and the other end of the needle is inserted into a vacuum tube in various forms, the two disadvantages of the method are relatively complex in operation, professional medical personnel are required to perform the operation and strictly follow the operation steps, pain is caused after the needle at one end is inserted into a human body, and the other end of the needle at the other end is difficult to avoid relative movement or shaking of the needle in the human body when corresponding operation is performed, further pain is caused, the advantages of the invention can be embodied, through the ingenious design at the rubber body 60, the communication channel with the negative pressure container 20 can be opened when the blood sampling needle, pain caused by the blood collection needle 70 staying in the human body for a long time is avoided.

Preferably, as shown in fig. 8, the outer side wall of the rubber body 60 is wrapped by a metal casing 65, the metal casing 65 belongs to a hard casing, the deformation is extremely small, the rubber body 60 belongs to a soft material and is extremely easy to deform, the metal casing 65 can enable the material inside the rubber body 60 to be more compact, the deformation of the rubber body 60 is prevented from expanding outwards to enlarge the inner diameter of the blood through tube groove two 64, the improvement has the advantage that the inner wall of the blood through tube groove two 64 is enabled to be more compact in contact with the outer wall of the upper end part of the blood taking needle 70, and a better sealing effect is achieved.

Preferably, as shown in the schematic perspective sectional view of fig. 10 and the schematic sectional structure of fig. 11, a vertical anti-dropping rod 72 is fixedly arranged on the upper end surface of the top pressing plate 71, the trigger disc 50 is provided with a through hole 52 at a corresponding position, the upper part of the anti-falling rod 72 passes through the corresponding through hole 52, the top end of the anti-falling rod 72 is arranged above the upper end surface of the trigger disc 50, the top end of the anti-falling rod 72 is provided with a transverse clamping strip 73, the clamping strip 73 is also arranged above the upper end surface of the trigger disc 50, and the length of the clamping strip 73 is larger than the inner diameter of the through hole 52, so that the clamping strip 73 can be always limited above the upper end surface of the trigger disc 50, the clamping strip 73 can limit the falling of the anti-falling rod 72, when the trigger plate 50 is in a fixed state, the fall of the pressing plate 71 and the lancet 70 can be restricted, and the upper end of the lancet 70 can be prevented from being separated from the rubber body 60 during packaging and transportation.

As a modification of the foregoing, the outer diameter of the pressing plate 71 is equal to or greater than the outer diameter of the trigger plate 50, so that the trigger plate 50 is prevented from being manually fixed to the latch 44 again by the user by the pressing plate after falling off.

As the improvement, the top end surface of the top cover 21 of the negative pressure container 20 is provided with indents 26 corresponding to the stoppers 93 at two sides opposite to the piston rod 91, and the bottoms of the stoppers 83 can be sunk into the indents 26 when the stoppers 93 at two sides of the piston rod 91 are adjusted to a certain position, so as to prevent the piston rod 91 from rotating freely.

As a modification of the above, the length of the blood taking needle 70 below the pressing plate 71 is smaller than the length of the second blood through groove 64, so that the blood taking process is prevented from being disabled as the top end of the blood taking needle 70 is separated from the second blood through groove 64 when the blood taking needle 70 penetrates the skin downwards.

As the improvement, the upper end edge 53 of the trigger disc 50 is provided with a cambered chamfer, so that the trigger disc is easily placed between the limiting lugs 43 in the production process.

As a modification of the foregoing, as shown in fig. 11, a detachable protective cap 13 is disposed at the bottom of the outer sleeve 10, the protective cap 13 may be screwed or snap-fitted on the bottom of the outer sleeve 10, a bottom cover is disposed at the bottom of the protective cap 13, a height formed inside the protective cap 13 is greater than a maximum distance that the top press ring 30 extends out of the outer sleeve 10, the protective cap 13 may be disposed behind the bottom of the outer sleeve 10, the top press ring 30 may be touched and pushed up to open the device triggering mechanism, and the protective cap 13 may be removed in use.

Claims

1. The utility model provides a disposable trace negative pressure ware of getting blood which characterized in that: including outer sleeve (10), negative pressure container (20), top clamping ring (30), outer sleeve (10) are cylindrical tubular structure with negative pressure container (20), the inside cavity that exists of outer sleeve (10), its bottom is the fretwork state, the fixed upper end (11) department that sets up at outer sleeve (10) in upper portion of negative pressure container (20), outer sleeve (10) are in same straight line department with the cylinder central axis of negative pressure container (20), the inner wall department of outer sleeve (10) is provided with spacing strip (40) of the vertical setting of twice symmetry, the upper end of spacing strip (40) is connected through connecting strip (41) and is fixed on the inner wall of outer sleeve (10), the lower tip (42) of spacing strip (40) of both sides support and lean on the upper end two (31) departments at top clamping ring (30), the top external diameter of top clamping ring (30) is less than the interval that the lower tip (42) of both sides spacing strip (40) are in under the natural state, the bottom outer diameter of the supporting ring is larger than the distance between the lower end portions (42) of the two side limiting strips (40) in a natural state, the top pressing ring (30) moves vertically upwards to stretch the two side limiting strips (40), a circle of first supporting ring (32) is arranged on the outer side wall of the middle area of the top pressing ring (30), a circle of corresponding second supporting ring (12) is arranged on the inner side wall of the bottom of the outer sleeve (10), the outer diameter of the first supporting ring (32) is larger than the inner diameter of the second supporting ring (12), the first supporting ring (32) is located above the second supporting ring (12), limiting convex blocks (43) are arranged on the inner walls of the middle same areas of the two side-symmetrically arranged limiting strips (40), a trigger disc (50) is arranged between the limiting convex blocks (43), the trigger disc (50) is an annular object with a certain thickness, and a cylindrical through cavity is arranged in the central area of the annular object, the external diameter of the trigger disc (50) is smaller than the internal diameter of the jacking ring (30), the inner side wall of a limiting convex block (43) on the limiting strip (40) is provided with a latch (44) and correspondingly, the two sides of the outer wall of the trigger disc (50) are provided with latch recesses (51) corresponding to the latch (44) at corresponding positions, the latch recesses (51) are in a recessed state, the latch (44) can be correspondingly clamped in the latch recesses (51) so that the trigger disc (50) is fixed on the limiting convex block (43), the jacking ring (30) can increase the distance between the limiting strips (40) and enable the latch (44) to be separated from the latch recesses (51) when upwards pushing the limiting strips (40) at the two sides, in addition, the negative pressure container (20) is positioned above the trigger disc (50), the external diameter of the negative pressure container (20) is smaller than the external diameter of the trigger disc (50), and the negative pressure container (20) is a shell-shaped component, a cylindrical cavity is arranged in the negative pressure container, the inner wall of the negative pressure container is in a smooth state, a top cover (21) and a bottom cover (22) are arranged above and below the negative pressure container, the edge positions of the top cover (21) and the bottom cover (22) and the upper and lower side edges of the negative pressure container (20) are in a sealed state, penetrating small holes (23) are symmetrically arranged on the bottom cover (22) opposite to the circle center, a rubber body (60) is fixedly arranged on the lower end face of the bottom cover (22), the rubber body (60) is composed of an upper part and a lower part and respectively composed of a part I (61) with an inverted circular truncated cone shape and a part II (62) with a cylindrical shape, the part I (61) and the part II (62) are in an integrated state, the rest parts except the small holes (23) between the upper end face of the part I (61) and the lower end face of the negative pressure container (20) are in a sealed and fixed connection, and two blood vessel through grooves I (, the two blood circulation grooves I (63) are symmetrical relative to the central axis of the part I (61), the bottoms of the two blood circulation grooves I are close to each other, the tops of the two blood circulation grooves I (63) are separated from each other, the top ends of the two blood circulation grooves I (63) penetrate through the upper surface of the part I (61) and are respectively communicated with the symmetrical small holes (23) in the bottom cover (22), the central axis positions of the part II (62) and the part I (61) are both provided with a blood circulation groove II (64), the part II (62) and the blood circulation groove II (64) in the central axis position of the part I (61) are in a communicated state, the bottom end of the blood circulation groove II (64) penetrates through the lower surface of the part II (62), the top end of the blood circulation groove II (64) is close to the upper surface of the part I (61) but does not penetrate through the upper surface, and the lower ends of the blood circulation groove I (63) are both communicated with the approximate middle area of the blood circulation groove II (64, so that the first blood vessel passing groove (63) and the second blood vessel passing groove (64) are in a communicated state, and the blood taking needle (70) is also included, the blood taking needle (70) is a tubular needle body, a tube groove cavity for blood to flow through is arranged in the blood taking needle (70), the bottom end of the blood taking needle is in a sharp state, the top end of the blood taking needle is in a flat state, the outer diameter of the blood taking needle (70) is equal to the inner diameter of the second blood vessel passing groove (64), the upper end part of the blood taking needle is inserted into the second blood vessel passing groove (64), the outer wall of the upper end part of the blood taking needle is tightly attached to the inner wall of the second blood vessel passing groove (64), the top end of the blood taking needle (70) is inserted into the second blood vessel passing groove (64) and is abutted against the top end of the second blood vessel passing groove (64), when the top end of the blood taking needle (70) is inserted into the second blood vessel passing groove (64) at the part (61), the communicated part between the first blood vessel passing groove (, when the top end of the blood taking needle (70) is inserted into the blood through pipe groove II (64) at the part II (62), the blood taking needle (70) is communicated with the blood through pipe groove I (63) in the state, in addition, a top pressing plate (71) is fixedly arranged at the lower end area of the blood taking needle (70), the top pressing plate (71) is a circular disc-shaped object, the blood taking needle (70) is positioned at the circle center of the top pressing plate (71), the needle point part at the bottom end of the blood taking needle (70) is positioned below the top pressing plate (71), the top pressing plate (71) is positioned below the trigger plate (50), the top pressing plate (71) and the trigger plate (50) are in a relatively parallel state, meanwhile, the outer diameter of the top pressing plate (71) is also smaller than the inner diameter of the top pressing plate (30), in addition, a spring (80) is arranged above the trigger plate (50), the outer diameter of the spring (80) is smaller than the outer diameter of the trigger plate (50), but the inner diameter of the spring is, the upper area of the spring (80) is sleeved on the negative pressure container (20), the top end of the spring (80) is abutted against the lower end face of the upper end part I (11) of the outer sleeve (10), the bottom end of the spring (80) is abutted against the upper end face of the trigger disc (50), when the trigger disc (50) is fixed at the position of the latch (44) of the limiting bump (43), the spring (80) is in a squeezed state and has elastic force storage, in addition, a piston disc (90) is arranged inside the negative pressure container (20), the outer diameter of the piston disc (90) is equal to the inner diameter of the cylindrical cavity inside the negative pressure container (20), the outer ring wall of the piston disc (90) is tightly attached to the inner wall of the negative pressure container (20), the piston disc (90) can move up and down along the cylindrical cavity inside the negative pressure container (20), the outer ring wall of the piston disc (90) is made of rubber materials, and the contact part of the outer ring wall of the piston disc (90, the vacuum pumping treatment or the negative pressure treatment is adopted in a lower cavity (24) which is arranged below a piston disc (90) in a negative pressure container (20), a piston rod (91) which is vertically arranged is fixedly arranged on the upper end face of the piston disc (90), a hole through which the piston rod (91) can pass is formed in a top cover (21), one part of the piston rod (91) passes through the top cover (21) and is positioned above the top cover (21), a pressing disc (92) is arranged at the top end of the piston rod (91), in addition, limiting blocks (93) which are symmetrically arranged are arranged on two sides of the piston rod (91), the distance between each limiting block (93) and the piston disc (90) is larger than the thickness of the top cover (21), and through holes (25) corresponding to the limiting blocks (93) are formed in two sides of the piston rod (91) relatively on the.

2. The disposable micro negative pressure hemospast according to claim 1, characterized in that: the outer side wall of the rubber body (60) is wrapped with a metal shell sleeve (65).

3. The disposable micro negative pressure hemospast according to claim 2, characterized in that: the fixed vertical anticreep pole (72) that is provided with on the up end of top pressure dish (71), trigger dish (50) are gone up and are provided with through hole (52) in corresponding position, corresponding through hole (52) are passed on the upper portion of anticreep pole (72) and the top of anticreep pole (72) is located more than trigger dish (50) up end, are provided with horizontal card strip (73) that set up on the top of anticreep pole (72), and the length of card strip (73) is greater than the internal diameter that passes through hole (52).

4. The disposable micro negative pressure hemospast according to claim 2, characterized in that: the outer diameter of the pressing plate (71) is equal to or larger than the outer diameter of the trigger plate (50).

5. The disposable micro negative pressure hemospast according to claim 2, characterized in that: the upper end face of the top cover (21) of the negative pressure container (20) is provided with dents (26) corresponding to the limiting blocks (93) on two sides opposite to the piston rod (91), and when the limiting blocks (93) on two sides of the piston rod (91) are adjusted to a certain position, the bottoms of the limiting blocks (93) sink into the dents (26).

6. The disposable micro negative pressure hemospast according to claim 2, characterized in that: the length of the part, below the top pressing plate (71), of the blood taking needle (70) is smaller than that of the second blood through pipe groove (64).

7. The disposable micro negative pressure hemospast according to claim 2, characterized in that: the upper end edge (53) of the trigger disc (50) is arranged by adopting an arc chamfer.

8. The disposable micro negative pressure hemospast according to any one of claims 1 to 7, characterized in that: the protective cap (13) capable of being detached is arranged at the bottom of the outer sleeve (10), a sealing bottom exists at the bottom of the protective cap (13), and the height formed inside the protective cap (13) is larger than the maximum distance of the top pressing ring (30) extending out of the outer sleeve (10).