CN211381380U - Puncture appliance capable of realizing continuous single-hand percussion and needle withdrawal - Google Patents

Abstract

The utility model discloses a one-hand continuous percussion moves back puncture utensil of needle, which comprises a housin, trigger the bullet and hit the subassembly, move back needle subassembly and cap for brush, the casing is by last casing, casing butt joint combination down, and inside formation holds the chamber, and the rear end forms the opening of two parallels, triggers the bullet and hits the subassembly and move back needle subassembly and adorn and holding the intracavity, and its rear end extends the casing from two openings respectively and parallels in the casing rear end, and the cap for brush cup joints on casing front end shrink, and the port is seted up one and is allowed the trompil that the blood taking needle walked through before the cap for brush. The utility model discloses the one hand grips, and the thumb transposition is pressed and is realized the percussion puncture, move back the needle operation promptly, and automatic reset position is equipped with next time operation behind the loose key, presses down and moves back the needle key blood taking needle and directly follow the desorption of cap of a writing brush front end, and direct cap of a writing brush front end is worn to adorn during the dress needle, need not to unload the cap of a writing brush, realizes the effect of the continuous percussion blood sampling of one hand, improves the convenience of use greatly.

Description

Puncture appliance capable of realizing continuous single-hand percussion and needle withdrawal

Technical Field

The invention relates to the technical field of medical sampling devices, in particular to a puncture device capable of continuously triggering and withdrawing a needle by one hand.

Background

In modern medicine, it is very common to quantitatively determine relevant components in body fluids of human and animals, for example, for a specific patient or animal, by puncturing living skin to collect a blood sample, and monitoring and analyzing glucose, lactate, cholesterol, bilirubin, and the like in the blood. Puncture devices and a variety of similar devices, such as blood collectors and blood collection pens, are continuously improved, and the puncture devices and blood collection needles used in cooperation with the puncture devices are more and more widely applied. However, most puncture instruments on the market are reusable tools due to cost, and in order to avoid cross infection, the blood collection needles used with the puncture instruments are disposable products, and the puncture instruments and the blood collection needles are combined for use.

The puncture instrument completes one blood sampling operation, and nine basic steps are required: 1. the pen cap is disassembled, 2, the needle is installed and the needle protection cap is removed, 3, the pen cap is installed and returned, 4, the puncture depth is adjusted, 5, loading preparation is carried out, 6, the blood is collected by pressing a button for puncture, 7, the pen cap is disassembled, 8, the needle is disassembled at the side edge (the needle key is pushed forwards and retreated and then pulled backwards for reset), 9, the pen cap is installed and returned for standby and the like, the whole process needs to be repeatedly operated, and the operation is very complicated. In the structure of the needle-mounting and needle-dismounting-free blood sampling pen disclosed in the chinese patent CN109512437A, although the process of repeatedly mounting and dismounting the pen cap is eliminated by replacing the needle, the following steps are still not simplified: 1. when the blood is collected by puncture each time, the tail rod needs to be pulled backwards for loading preparation, and then the side wall emission button is pressed to puncture the blood; 2. after the puncture blood collection, the needle key is pushed forwards and retreated at the side edge and then pulled backwards for resetting. The two steps also need to be repeatedly exchanged, so that the operation is not facilitated by one hand, the blood sampling connection cannot be realized, the complexity is reduced, the effect is still not ideal, and the convenience in use is greatly reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a puncture instrument for realizing continuous single-hand percussion and needle withdrawal, which solves the problems, the trigger key and the needle withdrawal key are arranged in parallel for puncture, the puncture instrument is held and controlled by a single hand, the percussion puncture and the needle withdrawal can be realized by the transposition and pressing of the thumb, the next operation is automatically recovered after the key is released, the blood taking needle is directly detached from the front end of the pen cap by pressing the needle withdrawal key, the needle is directly inserted from the front end of the pen cap during needle installation, the pen cap is not required to be detached, the effect of continuous single-hand percussion blood taking is realized, and the use convenience is greatly improved.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a puncture utensil that single-hand percussion retreats needle in succession, which comprises a housin, trigger the bullet and hit the subassembly, retreat needle subassembly and cap for brush, the casing is by last casing, the combination of casing butt joint down, inside formation holds the chamber, the rear end forms the opening of two parallels, trigger the bullet and hit the subassembly and retreat the needle subassembly and adorn and holding the intracavity, its rear end extends the casing from two openings respectively and parallels in the casing rear end, the cap for brush cup joints on casing front end shrink, the opening that can let the adaptation blood taking needle pass through is seted up to the port before the cap for brush.

According to a further improved technical scheme, the side part of the rear end of the shell is provided with a hand rest, and the hand rest and the needle withdrawing assembly are respectively arranged on the left side and the right side of the triggering impact assembly; or the hand rest and the needle withdrawing component are respectively arranged at two adjacent sides of the triggering and impacting component. The hand is hung on the index finger, and when the thumb is shifted, switched and pressed, the puncture tool cannot slide off, so that the use is more convenient.

The invention further improves the technical scheme that the improved structure also comprises an outer casing sleeve sleeved outside the shell, and the front end contraction part of the shell protrudes out of the front port of the outer casing sleeve. The shell sleeve is sleeved outside the shell formed by the upper shell and the lower shell, so that smooth appearance is better in holding feeling, and dust is prevented from entering the interior.

The invention further improves the technical proposal that the triggering and impacting component comprises a triggering key, a triggering key reset spring, a triggering key sleeve, an impacting spring, an impacting rod, a positioning pin, an impacting rod and an impacting rod reset spring,

a first strip-shaped groove is formed in one side of the outer surface of the front portion of the trigger key, the front groove edge and the rear groove edge of the first strip-shaped groove are oblique edges inclined in the same direction, and a second strip-shaped groove is formed in the other side, opposite to the first strip-shaped groove, of the trigger key in a mirror symmetry mode;

a 7-shaped first sliding groove is formed in one side of the outer surface of the trigger key sleeve, the horizontal section of the first sliding groove is consistent with the low point direction of the front groove edge of the first strip-shaped groove, and a second sliding groove is formed in the other side, opposite to the first sliding groove, of the trigger key sleeve in a mirror symmetry mode along the surface of the trigger key sleeve;

the trigger key reset spring is sleeved on the trigger key, the trigger key is sleeved at the front end of the trigger key, two ends of the trigger key reset spring are abutted against the rear end of the trigger key sleeve and a convex ring on the peripheral surface of the trigger key, the rear end of the striking rod is connected with a striking spring and arranged in an inner cavity of the trigger key, the front end of the striking rod is radially provided with a pin hole, a positioning pin is arranged in the pin hole in a penetrating manner, two ends of the positioning pin sequentially penetrate through a strip-shaped groove and a sliding groove at the corresponding end from inside to outside and are respectively and transversely supported on a step surface of a horizontal section of the; the ejection rod is positioned at the front end of the ejection rod, the rear end of the ejection rod is aligned with the ejection rod, the front end of the ejection rod is provided with a needle seat for mounting a blood taking needle, the rear end of the needle seat is provided with a through hole, and two ends of an ejection rod reset spring are respectively abutted against the ejection rod and the wall of an ejection rod reset spring accommodating cavity arranged in the shell;

the needle withdrawing assembly comprises a needle withdrawing rod and a needle withdrawing rod reset spring, the front end of the needle withdrawing rod is aligned to the through hole at the rear end of the needle seat, the rear end of the rod body penetrates out of the shell, and two ends of the needle withdrawing rod reset spring are respectively abutted against the needle withdrawing rod and the needle withdrawing rod reset spring arranged in the shell to accommodate the cavity wall.

The triggering key is pressed, the positioning pin slides down from the horizontal section of the sliding chute of the triggering key sleeve under the pressing of the inclined edge of the strip-shaped groove of the triggering key and moves forwards in the vertical groove, and the ejection rod is pushed forwards by the ejection rod to extend the blood taking needle; after the hands are released, the triggering key resets under the action of the ejection rod reset spring and the triggering key reset spring, and the blood taking needle retracts. The thumb moves to press the top end of the needle withdrawing rod, the front end of the needle withdrawing rod moves forwards to detach the blood taking needle from the needle seat of the ejection rod, and the blood taking needle directly drops out from the front end opening of the pen cap; after the hand is loosened, the needle withdrawing rod is reset under the action of the needle withdrawing rod reset spring to prepare for next needle removal.

According to a further improved technical scheme of the invention, the needle withdrawing rod consists of a needle withdrawing key and an ejector rod, and an extension part and a fork mouth which are matched with the buckle are respectively arranged at the front part of the needle withdrawing key and the rear part of the ejector rod. The needle withdrawing rod is designed in a split mode, processing and assembling are facilitated, the needle withdrawing rod and the needle withdrawing rod are clamped through the extension parts and the fork openings, and the structure is stable.

According to a further improved technical scheme of the invention, the main body part of the ejection rod is of a double-wall structure with an n-shaped section. The ejection rod is generally of a flat and slender structure and is easy to deform, and the dual-wall structure is adopted in the invention to solve the problem.

According to a further improved technical scheme of the invention, the radial section of the periphery of the trigger key sleeve is non-circular, and the section of an accommodating cavity in the shell is matched with the section of the accommodating cavity. Prevent that touch key cover from rotating in casing circumference.

According to a further improved technical scheme of the invention, the back surfaces of the thimble rod and the ejection rod and the inner wall of the lower shell are respectively provided with a convex rib and a notch which are matched and clamped in an axial direction, so that a striding sliding structure is formed. The axial movement of the ejector pin rod and the ejection rod plays a limiting and guiding role.

According to a further improved technical scheme of the invention, the ejection keycap is sleeved at the rear end of the trigger key. The ejection keycap increases the contact surface pressed by the thumb, and the use is more comfortable.

According to a further improved technical scheme of the invention, the shell is provided with an observation hole. The observation hole can see whether the components in the inner cavity of the shell are installed in place.

The invention has the beneficial effects that:

the trigger impact assembly and the top surface key of the needle withdrawing assembly are arranged in parallel and held by a single hand, the hand is hung on an index finger, the operation of percussion puncture and needle withdrawing can be realized by changing the position and pressing of the thumb, the next operation is automatically repeated after the key is released, the blood taking needle is directly removed from the front end of the pen cap by pressing the needle withdrawing key, the needle is directly penetrated and installed from the front end of the pen cap during needle installation, the pen cap does not need to be detached, the effect of single-hand continuous percussion blood taking is realized, the use convenience is greatly improved, the trigger impact assembly is particularly suitable for long-time continuous puncture operation, the operation fatigue of an operator is reduced, and the.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an exploded perspective view of the present invention;

FIG. 3 is a first perspective sectional view of the present invention;

FIG. 4 is a second perspective sectional view of the present invention;

FIG. 5 is a perspective view of the inner elevation of the lower housing;

FIG. 6 is a perspective view of the toggle key;

FIG. 7 is a perspective view of the trigger sleeve;

FIG. 8 is a perspective view of the ejection lever;

FIG. 9 is a perspective view of the thimble rod;

FIG. 10 is a perspective view of the needle withdrawing key;

wherein the content of the first and second substances,

the device comprises a shell 1, an upper shell 11, a lower shell 12, an ejection rod return spring accommodating cavity 121, a needle withdrawing rod return spring accommodating cavity 122, a notch 123, a hand rest 13, a contraction part 14 and an observation hole 15;

the trigger and ejection assembly 2 comprises a trigger key 21, a first strip-shaped groove 211, a second strip-shaped groove 212, a trigger key reset spring 22, a trigger key sleeve 23, a first sliding groove 231, a second sliding groove 232, an ejection spring 24, an ejection rod 25, a positioning pin 26, an ejection rod 27, a needle seat 271 and an ejection rod reset spring 28;

the needle withdrawing assembly 3 comprises a needle withdrawing rod 31, a needle withdrawing key 311, an ejector pin rod 312, an extension part 3111, a fork 3121 and a needle withdrawing rod reset spring 32;

a pen cap 4;

an outer shell 5;

and a blood collection needle 6.

Detailed Description

As shown in fig. 1 to 10, the present invention includes a housing 1, a trigger striking assembly 2, a needle withdrawing assembly 3 and a pen cap 4, wherein the housing 1 is assembled by an upper housing 11 and a lower housing 12 in a butt joint manner, a receiving cavity is formed inside the housing, two parallel through holes are formed at the rear end of the housing, the trigger striking assembly 2 and the needle withdrawing assembly 3 are assembled in the receiving cavity, the rear ends of the trigger striking assembly and the needle withdrawing assembly extend out of the housing from the two through holes respectively and are parallel to the rear end of the housing, the pen cap 4 is sleeved on a contraction portion 14 at the front end of the housing 1, and an opening through which the blood collection needle 6 can pass is formed at the.

The triggering and impacting component 2 comprises an ejecting keycap 29, a triggering key 21, a triggering key reset spring 22, a triggering keycap 23, an impacting spring 24, an impacting rod 25, a positioning pin 26, an ejecting rod 27 and an ejecting rod reset spring 28,

a first strip-shaped groove 211 is arranged on one side of the outer surface of the front part of the trigger key 21, the front groove edge and the rear groove edge of the first strip-shaped groove are inclined edges inclined in the same direction, and a second strip-shaped groove 212 is arranged on the other side opposite to the first strip-shaped groove along the outer surface of the trigger key in a mirror symmetry manner;

a 7-shaped first sliding groove 231 is formed in one side of the outer surface of the trigger key sleeve 23, the horizontal section of the first sliding groove is consistent with the low point direction of the front groove edge of the first strip-shaped groove, and a second sliding groove 232 is formed in the other side, opposite to the first sliding groove, of the trigger key sleeve in a mirror symmetry mode;

the trigger key reset spring 22 is sleeved on the trigger key 21, the trigger key sleeve 23 is sleeved at the front end of the trigger key 21, two ends of the trigger key reset spring 22 are abutted against the rear end of the trigger key sleeve 23 and a convex ring on the peripheral surface of the trigger key 21, the striking rod is of a stepped cylindrical structure with a thick front part and a thin rear part, the rear end is sleeved with a striking spring 24 and is arranged in an inner cavity of the trigger key 21, a pin hole is radially arranged at the front end, a positioning pin 26 is arranged in the pin hole in a penetrating manner, two ends of the positioning pin 26 sequentially penetrate through a strip-shaped groove and a sliding groove at the corresponding end from inside to outside, and the positioning pin 26 respectively crossarms the; the ejection rod 27 is positioned at the front end of the ejection rod 25, the rear end of the ejection rod is aligned with the ejection rod, the front end of the ejection rod is provided with a needle seat 271 for mounting a blood taking needle, the rear end of the needle seat is provided with a through hole, one end of an ejection rod return spring 28 is sleeved on a spring column on the ejection rod 27, and the other end of the ejection rod return spring abuts against the wall of an ejection rod return spring accommodating cavity 121 arranged in the shell; the rear end of the trigger key 21 is sleeved with an ejection keycap 29.

The needle withdrawing assembly 3 comprises a needle withdrawing rod 31 consisting of a needle withdrawing key 311 and an ejector pin rod 312, and a needle withdrawing rod resetting spring 32, wherein the front end of the ejector pin rod 312 is aligned with a through hole at the rear end of the needle seat 271, the rear end of the rod body is provided with a fork port 3121 which is matched and clamped with an extension 3111 at the front end of the needle withdrawing key 311 outside the shell, one end of the needle withdrawing rod resetting spring 32 is sleeved on a spring column on the ejector pin rod 312, and the other end of the needle withdrawing rod resetting spring abuts against the wall of a needle withdrawing rod resetting spring accommodating cavity 122 arranged in the shell.

The top surface and the top surface of the needle withdrawing key 311 outside the shell are arranged side by side left and right, the side edge part of the rear end of the shell 1 is provided with an arc-shaped hand rest 13, and the hand rest 13 and the needle withdrawing key 311 are arranged on the left side and the right side of the ejection keycap 29 side by side. Still cup jointed outer shell 5 outside casing 1, the outstanding 5 front ports of outer shell of front end shrink of casing 1, the casing buckle mode that the shell and last casing, lower casing merge and form is solid, also can be hot melt, sticky mode solid. The observation hole 15 is arranged on the shell 1, so that whether the internal parts are in place or not can be observed conveniently during assembly, and the shell 5 is sleeved outside the shell, so that the hand-held touch feeling can be improved, and external dust can be prevented from entering the cavity.

The main body part of the ejection rod 27 is of an n-shaped double-wall structure, is different from a conventional slender flat structure, and is not easy to deform.

The radial section of the periphery of the trigger key sleeve 23 is non-circular, and the section of the accommodating cavity in the shell 1 is matched with the section of the accommodating cavity, so that the trigger key sleeve is prevented from rotating in the circumferential direction in the cavity of the shell.

Protruding ribs and notches 123 which are axially matched and clamped are respectively arranged on the back surfaces of the ejector pin rod 312 and the ejection rod 27 and on the inner wall of the lower shell 12, a striding sliding structure is formed, the axial movement of the ejector pin rod and the ejection rod is guided, and the ejector pin rod and the ejection rod cannot shake left and right.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (10)

1. A puncture instrument capable of continuously triggering and withdrawing a needle by one hand is characterized in that: including casing (1), trigger bullet and hit subassembly (2), move back needle subassembly (3) and cap for brush (4), casing (1) is by last casing (11), casing (12) butt joint combination down, inside formation holds the chamber, the rear end forms the opening of two parallels, trigger bullet and hit subassembly (2) and move back needle subassembly (3) and install and holding the intracavity, its rear end extends the casing from two openings respectively and parallels in the casing rear end, cap for brush (4) cup joint on casing (1) front end portion of contracting (14), the opening that can let adaptation blood taking needle (6) walk through is seted up to the port before cap for brush (4).

2. A single-handed, continuous-fire, retracting lancing device according to claim 1, wherein: the side part of the rear end side of the shell (1) is provided with a hand rest (13), and the hand rest (13) and the needle withdrawing assembly (3) are respectively arranged at the left side and the right side of the trigger impact assembly (2); or the hand rest (13) and the needle withdrawing component (3) are respectively arranged at two adjacent sides of the triggering and striking component (2).

3. A single-handed, continuous-fire, retracting lancing device according to claim 1, wherein: the shell is characterized by further comprising an outer shell (5) sleeved outside the shell (1), and the front end contraction part of the shell (1) protrudes out of the front port of the outer shell (5).

4. A single-handed, continuous-fire, retracting lancing device according to claim 1, wherein: the triggering and striking component (2) comprises a triggering key (21), a triggering key reset spring (22), a triggering key sleeve (23), a striking spring (24), a striking rod (25), a positioning pin (26), a striking rod (27) and a striking rod reset spring (28),

a first strip-shaped groove (211) is arranged on one side of the outer surface of the front part of the trigger key (21), the front groove edge and the rear groove edge of the first strip-shaped groove are inclined edges inclined in the same direction, and a second strip-shaped groove (212) is symmetrically arranged on the other side opposite to the first strip-shaped groove along the outer surface of the trigger key in a mirror image manner;

a 7-shaped first sliding groove (231) is formed in one side of the outer surface of the trigger key sleeve (23), the horizontal section of the first sliding groove is consistent with the low point direction of the front groove edge of the first strip-shaped groove, and a second sliding groove (232) is formed in the other side, opposite to the first sliding groove, of the trigger key sleeve in a mirror symmetry mode;

the trigger key reset spring (22) is sleeved on the trigger key (21), the trigger key sleeve (23) is sleeved at the front end of the trigger key (21), two ends of the trigger key reset spring (22) are abutted against the rear end of the trigger key sleeve (23) and a convex ring on the peripheral surface of the trigger key (21), the rear end of the striking rod (25) is connected with a striking spring (24) and arranged in the inner cavity of the trigger key (21), the front end of the striking rod (25) is radially provided with a pin hole, a positioning pin (26) is arranged in the pin hole in a penetrating manner, two ends of the positioning pin (26) sequentially penetrate through a strip-shaped groove and a sliding groove of the corresponding end from inside to outside and are respectively and transversely arranged on a step surface of a horizontal section of the; the ejection rod (27) is positioned at the front end of the ejection rod (25), the rear end of the ejection rod is aligned to the ejection rod, the front end of the ejection rod is provided with a needle seat (271) for mounting a blood taking needle, the rear end of the needle seat is provided with a through hole, and two ends of an ejection rod reset spring (28) are respectively abutted against the ejection rod (27) and the wall of an ejection rod reset spring accommodating cavity (121) arranged in the shell;

move back needle subassembly (3) including moving back needle bar (31) and move back needle pole reset spring (32), move back needle pole (31) front end and aim at the through-hole of needle file (271) rear end, outside the body of rod rear end passed the casing, move back needle pole reset spring (32) both ends butt respectively move back needle bar (31) and the interior back needle pole reset spring that sets up of casing and hold chamber (122) chamber wall.

5. A single-handed continuous firing and retracting lancing device according to claim 4, wherein: the needle withdrawing rod (31) consists of a needle withdrawing key (311) and an ejector rod (312), and an extension part (3111) and a fork port (3121) which are matched with a buckle are respectively arranged at the front part of the needle withdrawing key (311) and the rear part of the ejector rod (312).

6. A single-handed continuous firing and retracting lancing device according to claim 4, wherein: the main body part of the ejection rod (27) is of a double-wall structure with an n-shaped section.

7. A single-handed continuous firing and retracting lancing device according to claim 4, wherein: the radial section of the periphery of the trigger key sleeve (23) is non-circular, and the section of an accommodating cavity in the shell (1) is matched with the section of the accommodating cavity.

8. A single-handed continuous firing and retracting lancing device according to claim 5, wherein: the ejector pin rod (312), the back of the ejection rod (27) and the inner wall of the lower shell (12) are respectively provided with a convex rib and a notch (123) which are axially matched and clamped, and a striding sliding structure is formed.

9. A single-handed continuous firing and retracting lancing device according to claim 4, wherein: the rear end of the trigger key (21) is sleeved with an ejection keycap (29).

10. A single-handed, continuous-fire, retracting lancing device according to claim 1, wherein: an observation hole (15) is arranged on the shell (1).

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