Key type spring blood taking needle

Abstract

The utility model relates to the technical field of medical instruments, and discloses a button type spring blood taking needle which comprises a connecting seat, a needle seat and a grab handle, the interior of the connecting seat is axially through, a trigger window is formed in the side wall of the connecting seat, the needle seat is arranged in the connecting seat in a penetrating mode, and the grab handle is arranged in the needle seat. A needle tube is arranged at the end, close to the first end of the connecting base, of the needle base, an elastic key is arranged on the side wall of the needle base, a spring is arranged between the needle base and the first end of the connecting base, the interior of the grab handle is axially through, and the grab handle is in butt joint with the second end of the connecting base. According to the button type spring blood taking needle, the rapid retraction action of the needle tube is achieved in a button type triggering mode, the structure is simple, operation is convenient and fast, puncturing is effectively prevented, and the use safety of the blood taking needle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, it relates to a button type spring blood taking needle. BACKGROUND

[0002] Disposable sterile blood taking needle is often used with other blood taking instruments to collect human peripheral blood sample and meet the need of blood sample detection. After blood taking, the needle has been adhered to human blood, so the used needle must be disposed to avoid the medical staff or other people being pricked, even the blood taking needle being used again, which causes infection risk.

[0003] The traditional blood taking instrument does not have the needle withdrawing function, and it is extremely inconvenient to take off the blood taking needle after use, and even the operator can be injured. Some blood taking instruments have the needle withdrawing function, but most of them have defects in structure design, and it is not easy to trigger the needle withdrawing, and even the function can be easily disabled, so it is necessary to further optimize the structure. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a button type spring blood taking needle to solve the problems in the above background technology.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A button type spring blood taking needle, comprising a connecting seat, a needle seat and a handle, the inside of the connecting seat is axially through, a trigger window is formed on the side wall of the connecting seat, the needle seat is arranged in the inside of the connecting seat, a needle tube is arranged on the first end of the needle seat close to the connecting seat, an elastic button is arranged on the side wall of the needle seat, a spring is arranged between the needle seat and the first end of the connecting seat, the inside of the handle is axially through, the second end of the handle is butted with the connecting seat, in the initial state, the spring is compressed, the elastic button is stretched out of the trigger window and is limited by the edge of the trigger window, so that the position of the needle seat is locked, and the needle tube is stretched out of the first end of the connecting seat; in the needle withdrawing state, the elastic button is pressed into the trigger window, the limiting effect of the trigger window on the elastic button is invalid, the needle seat is driven into the handle by the elastic force of the spring, and the needle tip of the needle tube is withdrawn into the connecting seat.

[0007] As an optional scheme, a trigger shell is arranged on the connecting seat and corresponds to the position of the trigger window, an elastic pressing part is arranged on the trigger shell, and a protrusion is arranged on the elastic pressing part and used for pressing the elastic button.

[0008] As an optional scheme, the cross section of the trigger shell is C-shaped, clamping heads are arranged on the two sides of the trigger shell, and a protruding side edge is arranged on the connecting seat and used for clamping the clamping heads of the trigger shell.

[0009] As an option, the convex side is provided with two spaced apart positioning grooves, the inner surface of the trigger shell is provided with a convex rib matched with any one of the positioning grooves, in the initial state, the convex rib is located in one of the positioning grooves, the elastic pressing part is dislocated with the elastic button, so that the elastic pressing part cannot contact the elastic button; in the needle withdrawing state, the convex rib is located in the other positioning groove, the elastic pressing part abuts against the elastic button, so that the elastic pressing part can drive the elastic button.

[0010] As an option, the side wall of the needle seat is provided with a convex part, one end of the spring abuts against the convex part, and the other end of the spring abuts against the inner wall of the first end of the connecting seat.

[0011] As an option, the side wall of the handle is provided with an elastic clamping jaw, the elastic clamping jaw is bent towards the inside of the handle, in the process of the needle withdrawing state, the needle seat moves away from the connecting seat, and the elastic clamping jaw is pried open by the convex part; after the needle withdrawing state, the elastic clamping jaw is bent back and reversely limits the convex part, so that the needle seat cannot move to the connecting seat again.

[0012] As an option, the connecting seat is buckled and inserted with the handle, the inner wall of the second end of the connecting seat is provided with an annular clamping groove, and the end of the handle is provided with an annular convex part matched with the annular clamping groove.

[0013] As an option, the surface of the handle is provided with a positioning convex part, and the end of the connecting seat is provided with a groove embedded with the positioning convex part.

[0014] As an option, the end of the needle seat close to the first end of the connecting seat is provided with a cap, and the needle tube is arranged in the cap, and the cap is used for covering the needle tip of the needle tube in the initial state.

[0015] As an option, the connecting seat is provided with a butterfly wing, and the outer surface of the connecting seat is provided with an axial convex rib used for preventing the butterfly wing from rotating.

[0016] The key type spring blood taking needle realizes the quick retracting action of the needle tube through the key type triggering mode, is simple in structure, convenient to operate, effectively prevents needle sticking, and improves the use safety of the blood taking needle. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the appearance of the key type spring blood taking needle provided by the utility model embodiment Figure One ;

[0018] Figure 2 is the appearance of the key type spring blood taking needle provided by the utility model embodiment Figure Two ;

[0019] Figure 3It is the explosion drawing of the key type spring blood taking needle provided by the embodiment of the utility model;

[0020] Figure 4 It is the structure schematic view of the connecting seat in the key type spring blood taking needle provided by the embodiment of the utility model;

[0021] Figure 5 It is the structure schematic view of the handle in the key type spring blood taking needle provided by the embodiment of the utility model;

[0022] Figure 6 It is the structure schematic view of the trigger shell in the key type spring blood taking needle provided by the embodiment of the utility model.

[0023] In the drawings,

[0024] 1, connecting seat;11, trigger window;12, convex side;13, positioning groove;14, annular clamping groove;15, recess;16, axial convex rib;

[0025] 2, needle seat;21, needle tube;22, elastic button;23, convex part;

[0026] 3, handle;31, elastic clamping jaw;32, annular convex;33, positioning convex;

[0027] 4, spring;

[0028] 5, trigger shell;51, elastic pressing part;52, convex block;53, clamping head;54, convex rib;

[0029] 6, cap;

[0030] 7, butterfly wing. DETAILED DESCRIPTION

[0031] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0032] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other features between them.Moreover, first feature "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature.First feature "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0034] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0035] Please refer to Figures 1 to 6 As shown in the figure, the embodiment provides a key type spring blood taking needle, which comprises a connecting seat 1, a needle seat 2 and a handle 3, the inside of the connecting seat 1 is axially through, a trigger window 11 is formed in the side wall of the connecting seat 1, the needle seat 2 is arranged in the inside of the connecting seat 1, the end of the first end of the needle seat 2 close to the connecting seat 1 is provided with a needle tube 21, the side wall of the needle seat 2 is provided with an elastic key 22, the spring 4 is arranged between the needle seat 2 and the first end of the connecting seat 1, the inside of the handle 3 is axially through, and the second end of the handle 3 is butted with the connecting seat 1.

[0036] In the initial state, the spring 4 is compressed, the elastic key 22 is stretched out of the trigger window 11 and is limited by the along mouth of the trigger window 11 due to the elastic action of itself, so that the position of the needle seat 2 is locked, and the needle tube 21 is stretched out of the first end of the connecting seat 1.

[0037] In the needle withdrawing state, the elastic key 22 is pressed into the trigger window 11, the limiting action of the trigger window 11 on the elastic key 22 is invalid, the needle seat 2 is driven into the handle 3 by the elastic force of the spring 4, and the needle tip of the needle tube 21 is withdrawn into the connecting seat 1.

[0038] Therefore, through the key type trigger mode, the quick retraction action of the needle tube 21 is realized, the structure is simple, the cost is low, and the operation is convenient, so that the needle stick is effectively prevented, and the use safety of the blood taking needle is improved.

[0039] Optionally, a trigger shell 5 is arranged on the connecting base 1 and corresponds to the position of the trigger window 11, the trigger shell 5 is provided with an elastic pressing part 51, and the elastic pressing part 51 is provided with a protrusion 52 for pressing the elastic button 22. The presence of the trigger shell 5 can more accurately, effectively and conveniently trigger the elastic button 22, and avoid misoperation.

[0040] Further, the cross section of the trigger shell 5 is C-shaped, and the two sides of the trigger shell 5 are provided with clamping heads 53, and the connecting base 1 is provided with a raised side edge 12 for clamping the clamping heads 53 of the trigger shell 5, so as to facilitate the assembly of the trigger shell 5 and the connecting base 1 into one body and ensure the reliable fixation of the trigger shell 5.

[0041] Still further, the raised side edge 12 is provided with two spaced-apart positioning grooves 13, and the inner surface of the trigger shell 5 is provided with a protruding rib 54 matched with any one of the positioning grooves 13, so as to realize the effective and invalid switching of the trigger function by switching the protruding rib 54 matched with different positioning grooves 13, and avoid mis-triggering.

[0042] In the initial state, the protruding rib 54 is located in one of the positioning grooves 13, the elastic pressing part 51 is misaligned with the elastic button 22, so that pressing the elastic pressing part 51 cannot contact the elastic button 22, thereby avoiding triggering the needle withdrawal during transportation and blood sampling;

[0043] In the needle withdrawal state, the protruding rib 54 is located in the other positioning groove 13, and the elastic pressing part 51 abuts against the elastic button 22, so that pressing the elastic pressing part 51 can link the elastic button 22, and the trigger function is effective.

[0044] Optionally, the side wall of the needle seat 2 is provided with a protruding part 23, one end of the spring 4 abuts against the protruding part 23, and the other end of the spring 4 abuts against the inner wall of the first end of the connecting base 1, so as to ensure that the spring 4 forms a stable force on the needle seat 2.

[0045] Further, the side wall of the handle 3 is provided with an elastic clamping jaw 31, the elastic clamping jaw 31 naturally bends towards the inside of the handle 3, in the process of the needle withdrawal state, the needle seat 2 moves away from the connecting base 1, and the elastic clamping jaw 31 is pushed open by the protruding part 23; after the needle withdrawal state, the elastic clamping jaw 31 bends back and forms reverse limiting on the protruding part 23, so that the needle seat 2 cannot move towards the connecting base 1 again, thereby avoiding the needle tip of the needle tube 21 from being exposed from the connecting base 1 again, effectively avoiding the secondary use of the blood sampling needle, and meeting the requirement of one-time use.

[0046] Optionally, the connecting base 1 and the handle 3 are snap-inserted, the inner wall of the second end of the connecting base 1 is provided with an annular clamping groove 14, and the end of the handle 3 is provided with an annular protrusion 32 matched with the annular clamping groove 14, so as to facilitate the quick assembly of the connecting base 1 and the handle 3.

[0047] Further, the surface of the handle 3 is provided with a positioning protrusion 33, and the end of the connecting seat 1 is provided with a groove 15 embedded with the positioning protrusion 33, so as to ensure the accurate assembly of the connecting seat 1 and the handle 3.

[0048] Optionally, the end of the needle seat 2 close to the first end of the connecting seat 1 is provided with a cap 6, and the needle tube 21 is arranged in the cap 6, so as to cover the needle tip of the needle tube 21 in the initial state, prevent the needle tip of the needle tube 21 from being contaminated and damaged, and protect the safety of the user, and the cap 6 can be removed when used.

[0049] Optionally, the connecting seat 1 is sleeved with a butterfly wing 7, and the outer surface of the connecting seat 1 is provided with an axial protruding rib 16 for preventing the butterfly wing 7 from rotating, so that the operation is more stable and accurate when blood is collected.

[0050] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A push-button spring-loaded blood collection needle, characterized in that, The utility model provides a needle retraction device, which comprises a connecting seat (1), a needle seat (2) and a handle (3), the inside of the connecting seat (1) is axially through, a trigger window (11) is formed on the side wall of the connecting seat (1), the needle seat (2) is arranged in the inside of the connecting seat (1), the end of the needle seat (2) near the first end of the connecting seat (1) is provided with a needle tube (21), the side wall of the needle seat (2) is provided with an elastic button (22), a spring (4) is arranged between the needle seat (2) and the first end of the connecting seat (1), the inside of the handle (3) is axially through, the second end of the handle (3) is connected with the connecting seat (1), In the initial state, the spring (4) is compressed, the elastic button (22) is stretched out of the trigger window (11) and is limited by the along mouth of the trigger window (11), so that the position of the needle seat (2) is locked, and the needle tube (21) is stretched out of the first end of the connecting seat (1); In the needle retraction state, the elastic button (22) is pressed into the trigger window (11), the limiting effect of the trigger window (11) on the elastic button (22) is invalid, the needle seat (2) is driven into the handle (3) by the elastic force of the spring (4), and the needle tip of the needle tube (21) is retracted into the connecting seat (1).

2. The lancet of claim 1 wherein, A trigger shell (5) is arranged on the connecting seat (1) and corresponds to the position of the trigger window (11), the trigger shell (5) is provided with an elastic pressing part (51), and the elastic pressing part (51) is provided with a protruding block (52) for pressing the elastic button (22).

3. The lancet of claim 2 wherein, The cross section of the trigger shell (5) is C-shaped, the trigger shell (5) is provided with a clamping head (53) on both sides, and the connecting seat (1) is provided with a raised side edge (12) for clamping the clamping head (53) of the trigger shell (5).

4. The lancet of claim 3 wherein, The raised side edge (12) is provided with two spaced-apart positioning grooves (13), and the inner surface of the trigger shell (5) is provided with a convex rib (54) matched with any one of the positioning grooves (13), In the initial state, the convex rib (54) is located in one of the positioning grooves (13), the elastic pressing part (51) is misaligned with the elastic button (22), so that pressing the elastic pressing part (51) cannot contact the elastic button (22); In the needle retraction state, the convex rib (54) is located in the other positioning groove (13), the elastic pressing part (51) abuts against the elastic button (22), so that pressing the elastic pressing part (51) can drive the elastic button (22).

5. The key-type spring lancet of claim 1 wherein, The side wall of the needle seat (2) is provided with a protruding part (23), one end of the spring (4) abuts against the protruding part (23), and the other end of the spring (4) abuts against the inner wall of the first end of the connecting seat (1).

6. The lancet of claim 5, wherein: The side wall of the handle (3) is provided with an elastic clamping jaw (31), the elastic clamping jaw (31) is bent towards the inside of the handle (3), During the needle retraction state, the needle seat (2) moves away from the connecting seat (1), and the elastic clamping jaw (31) is pushed open by the protruding part (23); After the needle retraction state, the elastic clamping jaw (31) is bent back and reversely limited to the protruding part (23), so that the needle seat (2) cannot move to the connecting seat (1) again.

7. The key-type spring lancet of claim 1 wherein, The connecting seat (1) is buckled and inserted with the handle (3), and the inner wall of the second end of the connecting seat (1) is provided with an annular clamping groove (14), and the end of the handle (3) is provided with an annular protrusion (32) matched with the annular clamping groove (14).

8. The lancet of claim 7 wherein, The surface of the handle (3) is provided with a positioning protrusion (33), and the end of the connecting seat (1) is provided with a groove (15) embedded with the positioning protrusion (33).

9. The key-type spring lancet of claim 1 wherein, The end of the needle seat (2) close to the first end of the connecting seat (1) is provided with a cap (6), and the needle tube (21) is arranged in the cap (6), and the cap (6) is used for covering the needle tip of the needle tube (21) in the initial state.

10. The lancet of claim 1 wherein, The connecting seat (1) is provided with a butterfly wing (7), and the outer surface of the connecting seat (1) is provided with an axial protruding rib (16) for preventing the butterfly wing (7) from rotating.

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