Safe needle guard and safe blood taking needle cylinder

A safe, needle sheath technology, applied in the direction of needles, blood sampling devices, medical science, etc., can solve the problems of reducing the work efficiency, time-consuming and troublesome of medical staff

Active Publication Date: 2017-02-22

郑万章

6 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the needle part of the anti-puncture infusion needle in the prior art is not fixed securely during use, is easily damaged, and the needle protection recovery operation is cumber...

Method used

Further, the present embodiment also includes a position-limiting structure for positioning the needle body 1, the position-limiting structure includes a position-limiting groove formed on the inner wall of the protective cover 2, and a position-limiting groove formed on the inner wall of the needle body. 1 on the needle base and slid...

Abstract

The invention discloses a safe needle guard. The safe needle guard comprises a needle body and a protective sleeve rotationally arranged on the needle body in a sleeving mode through a connecting structure; the connecting structure comprises at least one sliding groove formed in the protective sleeve and at least one sliding part arranged on the needle body and embedded into the corresponding sliding groove in a sliding mode; at least one elastic stop part is arranged at the tail end of each sliding groove; during retraction, a needle head of the needle body retracts into an inner cavity of the protective sleeve, or the protective sleeve slides towards the needle head of the needle body, and when the sliding parts go across the elastic stop parts, the needle head retracts back to the inner cavity of the protective sleeve; therefore, the needle body slides to the head ends or the tail ends of the sliding grooves to the largest extent and only has the sliding direction, the stretching length of the needle body is always controllable, and when the needle head is not recovered after damage caused by stretching too long, the needle head can be retracted into the inner cavity of the protective sleeve just by directly pushing and pulling the needle body or the protective sleeve without rotating the needle body or the protective sleeve and will not stretch out of the protective sleeve again under the interaction of the sliding parts and the elastic stop parts.

Application Domain

SensorsBlood sampling devices +1

Technology Topic

Push and pullNeedle guard +1

Image

Examples

Experimental program(5)

Example Embodiment

[0031] Example 1

[0032] Such as figure 1 , 2 As shown in and 3, the safety needle cover according to this embodiment includes a needle body 1, and a protective cover 2 sheathed on the needle body 1 is rotated through a connecting structure, and the connecting structure includes at least one At least one sliding groove 3 on the protective sleeve 2 is provided on the needle body 1 and slidably embedded in the sliding portion 4 in the sliding groove 3; wherein, the tail end of the sliding groove 3 is also provided with at least one elastic The blocking part 5, when the needle body 1 retracts toward the inner cavity of the protective sleeve 2 or the protective sleeve 2 slides toward the needle head of the needle body 1, when the sliding part 4 passes over the The elastic blocking portion 5, the needle retracts into the inner cavity of the protective cover 2; as a preferred embodiment, the protective cover 2 is configured as a butterfly-shaped protective cover 2

[0033] In this safety needle cover, the sliding part 4 of the needle body 1 is always embedded in the sliding groove 3, so the needle body 1 slides up to the head end or the tail end of the sliding groove 3 The position and direction are only the sliding direction, and its extension length is always controllable, and the needle will not be damaged due to excessive extension; at the same time, there is no need to rotate the needle body 1 or the protective cover 2 when recycling , Simply push and pull the needle body 1 or the protective cover 2 directly to retract the needle into the inner cavity of the protective cover 2, and the sliding part 4 and the elastic blocking part 5 interact The protective sleeve 2 is no longer extended from the bottom.

[0034] Specifically, the sliding groove 3 is formed on the inner cavity wall of the protective cover 2, and the sliding portion 4 is configured as a first protrusion formed on the needle seat of the needle body 1, and the elastic blocking The portion 5 is set as a second protrusion formed at the end of the sliding groove 3 and protruding inward; wherein, the first protrusion has a first inclined surface, and the second protrusion has a The first inclined surface fits with the second inclined surface; because the first convex portion and the second convex portion have an inclined surface fit, once the first protrusion crosses the second protrusion, the The side surface of the first protrusion will abut against the side surface of the second protrusion, so that the first protrusion cannot go back over the second protrusion, so as to ensure that the retracted needle will not extend again The protective cover 2.

[0035] Further, this embodiment also includes a limiting structure for positioning the needle body 1, and the limiting structure includes a limiting groove formed on the inner wall of the protective sleeve 2 and a needle formed on the needle body 1. The limiting protrusion 9 on the seat and slidably embedded in the positioning groove; wherein the distance between the rear end of the limiting groove and the rear end of the sliding groove 3 is equal to or slightly larger than that of the sliding groove 3 The axial length of the portion 4; thereby preventing the needle body 1 from moving.

[0036] Wherein, in order to facilitate the operator to use force, the needle body 1 is also provided with a needle holder auxiliary member 6 at one end of the protective sheath 2. Specifically, it is preferable that the needle holder auxiliary member 6 is set to be sleeved on the The auxiliary circle seat at the end of the needle body 1; at the same time, the outer wall of the protective sleeve 2 is also provided with an external force auxiliary member 7 that facilitates the application of external force. Preferably, the external force auxiliary member 7 is set to be formed on the outer wall of the protective sleeve 2 Protrusion

Example Embodiment

[0037] Example 2

[0038] Such as Figure 4 with 5 As shown, a safety needle cover according to this embodiment includes a needle body 1, a protective cover 2 sheathed on the needle body 1 is rotated through a connecting structure, and the connecting structure includes at least one sheath At least one sliding part 4 provided on the needle main body 1 and slidably embedded in the sliding groove 3 on the sliding groove 3 on 2; wherein at least one elastic blocking part is also provided at the end of the sliding groove 3 5. When reclaiming, the needle of the needle body 1 retracts toward the inner cavity of the protective sleeve 2 or the protective sleeve 2 slides toward the needle of the needle body 1, when the sliding part 4 exceeds the elastic In the blocking part 5, the needle is retracted into the inner cavity of the protective sleeve 2; as a preferred embodiment, the protective sleeve 2 is configured as a butterfly-shaped protective sleeve 2.

[0039] In this safety needle cover, the sliding part 4 of the needle body 1 is always embedded in the sliding groove 3, so the needle body 1 slides up to the head end or the tail end of the sliding groove 3 The position and direction are only the sliding direction, and its extension length is always controllable, and the needle will not be damaged due to excessive extension; at the same time, there is no need to rotate the needle body 1 or the protective cover 2 when recycling , Simply push and pull the needle body 1 or the protective cover 2 directly to retract the needle into the inner cavity of the protective cover 2, and the sliding part 4 and the elastic blocking part 5 interact The protective sleeve 2 is no longer extended from the bottom.

[0040] The sliding groove 3 is configured as a through groove formed on the protective cover 2, the longitudinal direction of the through groove is consistent with the longitudinal direction of the protective cover 2, and the sliding portion 4 is provided on the needle body 1. The protruding part on the needle seat is slidably embedded in the through groove, and at least one inverted tooth-shaped elastic blocking part 5 is formed on the inner side wall of the tail end of the through groove.

[0041] In this embodiment, as a preferred embodiment, the elastic blocking portion 5 is configured as an inverted tooth elastic blocking formed on the inner side wall of the rear end of the through groove.

[0042] The side wall of the first end of the through groove is also formed with a groove 8 for engaging the protrusion.

Example Embodiment

[0043] Example 3

[0044] Such as Image 6 with 7 As shown, as a transformable embodiment, the difference between this embodiment and Embodiment 2 is that the elastic blocking portion 5 is configured as two inverted tooth elastic blocking portions formed on the inner side wall of the rear end of the through groove. .

PUM

Description & Claims & Application Information

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