Rotation type blood taking needle capable of being retracted automatically

Abstract

The invention provides a rotary automatic needle retracting blood taking needle, and belongs to the technical field of medical instruments, and the rotary automatic needle retracting blood taking needle comprises a first shell provided with a locking block and an unlocking groove; the blood taking needle assembly comprises a second shell and a needle body, the second shell can rotate relative to the circumferential direction of the first shell, the needle body is connected with the second shell and extends out of one end of the second shell, a linkage block is arranged at the other end of the second shell, and the linkage block is connected with the needle body. When the second shell rotates relative to the first shell, the linkage block can be aligned with the locking block or the unlocking groove. The device has the beneficial effects that when the first shell rotates until the linkage block is aligned with the unlocking groove, the second shell can move in the axial direction of the first shell, so that the needle body is driven to move in the axial direction of the first shell to enter the first shell; and cross infection or other medical pollution caused in the collecting, transporting and treating processes of the used blood taking needle is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices and relates to a rotary blood collection needle with automatic needle collection. Background Art

[0002] A lancet is a commonly used instrument in the medical field. The lancet uses the needle tip to pierce the skin to collect blood samples. When collecting blood, the wound of the person being collected is close to the operator's fingers or gloves. Therefore, after the collection is completed, the exposed needle can easily scratch the operator.

[0003] For example, an invention patent with a publication number of CN111166348A provides a blood collection needle, comprising: an outer sleeve, one end of which is provided with a needle outlet, the other end of which is provided with a receiving port, and a needle core guide portion is provided inside the outer sleeve; an inner sleeve, one end of which enters the outer sleeve from the receiving port and is snap-fitted with the outer sleeve, and the other end is located outside the receiving port; a needle core, which is provided with a blood collection needle body, and the needle core can be rotatably arranged at one end of the inner sleeve along the circumferential direction with the inner sleeve; and a spring, which provides power for the axial movement of the needle core along the needle core guide portion toward the needle outlet, wherein: a step surface adjacent to the needle core guide portion is provided inside the outer sleeve, and the needle core has an abutting end surface abutting against the step surface; a rotation guide portion is provided inside the outer sleeve, and a rotation fitting portion cooperating with the rotation guide portion is provided on the radially outer side of one end of the inner sleeve; and based on the axial movement of the inner sleeve toward the needle outlet, the rotation fitting portion cooperates with the rotation guide portion to make the inner sleeve rotate in the circumferential direction, and based on the rotation, the abutting end surface is suitable for leaving the step surface and entering the needle core guide portion.

[0004] In summary, some existing blood collection needles cannot be retracted after use, so that the exposed needles can easily scratch the operator, thereby causing cross infection or medical contamination, posing certain safety hazards and leaving much room for improvement. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to provide a rotary blood collection needle with automatic needle retraction.

[0006] The objectives of the present invention can be achieved through the following technical solutions: A rotating automatic needle-retracting blood collection needle, comprising: a first shell, which is provided with a locking block and an unlocking groove; a blood collection needle assembly, which includes a second shell and a needle body, the second shell can rotate relative to the circumferential direction of the first shell, the needle body is connected to the second shell and extends out of one end of the second shell, and the other end of the second shell is provided with a linkage block, when the second shell rotates relative to the first shell, the linkage block can be aligned with the locking block or the unlocking groove, when the linkage block is aligned with the locking block, the second shell is restricted from moving in the axial direction relative to the first shell, and when the linkage block is aligned with the unlocking groove, the second shell can move in the axial direction relative to the first shell.

[0007] In the above-mentioned rotating automatic needle collection needle, it also includes a third shell, the first shell is connected to the third shell and can rotate in the circumferential direction relative to the third shell, and the second shell is connected to the third shell and can move in the axial direction relative to the third shell.

[0008] The above-mentioned rotating automatic needle-retracting blood collection needle also includes a reset spring, and the reset spring can push the second shell to approach the first shell.

[0009] In the above-mentioned rotating automatic needle collection needle, the first shell is also provided with a positioning block, and the third shell is also provided with a first positioning groove and a second positioning groove. When the first shell rotates relative to the third shell, the positioning block is driven to move to the first positioning groove or the second positioning groove. When the positioning block is located in the first positioning groove, the linkage block is aligned with the locking block, and when the positioning block is located in the second positioning groove, the linkage block is aligned with the unlocking groove.

[0010] In the above-mentioned rotating automatic needle-retracting blood collection needle, the positioning block is provided with a movable inclined surface, and when the positioning block moves from the first positioning groove to the second positioning groove, it passes through the side wall of the first positioning groove via the movable inclined surface.

[0011] In the above-mentioned rotating automatic needle-retracting blood collection needle, the first positioning groove is provided with a fixed inclined surface, and the positioning block passes through the fixed inclined surface when moving from the first positioning groove to the second positioning groove.

[0012] In the above-mentioned rotating automatic needle-retracting blood collection needle, the first shell is also provided with a limit block, and the third shell is also provided with a limit slot. When the first shell rotates relative to the third shell, the limit block is driven to move in the limit slot. When the limit block contacts one side wall of the limit slot, the linkage block is aligned with the locking block. When the limit block contacts the other side wall of the limit slot, the linkage block is aligned with the unlocking slot.

[0013] In the above-mentioned rotating automatic needle-retracting blood collection needle, the first shell is further provided with a movable blocking part, and the second shell is further provided with a fixed blocking part, and the movable blocking part can contact the fixed blocking part to limit the axial movement of the second shell along the first shell.

[0014] In the above-mentioned rotating automatic needle-retracting blood collection needle, the first shell is further provided with a first clamping portion, and the third shell is provided with a second clamping portion, and the second clamping portion can be clamped with the first clamping portion.

[0015] The above-mentioned rotating automatic needle collection needle also includes a protective cap, which is detachably connected to the second shell. When the protective cap is connected to the second shell, it covers the portion of the needle body extending out of the second shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the first shell is rotated until the linkage block is aligned with the unlocking groove, the second shell can move along the axial direction of the first shell, thereby driving the needle body to move along the axial direction of the first shell into the interior of the first shell, thereby avoiding cross infection or other medical contamination caused by the used blood collection needle during collection, transportation and processing.

[0018] 2. When the linkage block is aligned with the unlocking slot, the reset spring is reset without pressure, thereby spontaneously pushing the second housing to move closer to the first housing, reducing the operator's manual action of pulling back the needle and improving the efficiency of blood sample collection.

[0019] 3. When the first shell drives the positioning block to rotate to the first positioning groove, the linkage block is aligned with the locking block so that the second shell cannot move. When the first shell drives the positioning block to rotate to the second positioning groove, the linkage block is aligned with the unlocking groove so that the second shell can move along the axial direction of the first shell.

[0020] 4. When the positioning block moves, the movable inclined surface contacts the fixed inclined surface of the first positioning groove, so that the positioning block can move smoothly from the first positioning groove to the second positioning groove.

[0021] 5. When the second shell moves along the axial direction of the first shell until the fixed blocking part passes over the movable blocking part, the action of the reset spring can drive the second shell to move in the opposite direction, so that the movable blocking part contacts the fixed blocking part, thereby restricting the second shell from moving in the opposite direction along the axial direction of the first shell, preventing the needle from extending again. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the rotary automatic needle-retracting blood collection needle of the present invention.

[0023] Figure 2 The diagram is an exploded view of the rotary automatic needle-retracting blood collection needle of the present invention.

[0024] Figure 3 It is a front view of the rotary automatic needle-retracting blood collection needle of the present invention before the needle is retracted.

[0025] Figure 4 for Figure 3 Section view from the AA perspective.

[0026] Figure 5 for Figure 3 A cross-sectional view from the BB perspective.

[0027] Figure 6 The present invention is a front view of the rotary automatic needle-retracting blood collection needle after the needle is retracted.

[0028] Figure 7 for Figure 6 Cross-sectional view from CC perspective.

[0029] In the figure, 100, the first shell; 110, the locking block; 120, the unlocking groove; 130, the positioning block; 131, the movable inclined plane; 140, the limiting block; 150, the movable blocking part; 160, the first clamping part; 210, the second shell; 211, the linkage block; 220, the needle body; 230, the fixed blocking part; 300, the third shell; 310, the first positioning groove; 311, the fixed inclined plane; 320, the second positioning groove; 330, the limiting groove; 340, the second clamping part; 400, the reset spring; 500, the protective cap. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0036] like Figure 1-Figure 7 As shown, a rotating automatic needle collection needle comprises: a first shell 100 and a blood collection needle assembly.

[0037] The first housing 100 is provided with a locking block 110 and an unlocking slot 120 .

[0038] Among them, the blood collection needle assembly includes a second shell 210 and a needle body 220. The second shell 210 can rotate in the circumferential direction relative to the first shell 100. The needle body 220 is connected to the second shell 210 and extends out of one end of the second shell 210. A linkage block 211 is provided at the other end of the second shell 210. When the second shell 210 rotates relative to the first shell 100, the linkage block 211 can be aligned with the locking block 110 or the unlocking groove 120. When the linkage block 211 is aligned with the locking block 110, the second shell 210 is restricted from moving in the axial direction relative to the first shell 100. When the linkage block 211 is aligned with the unlocking groove 120, the second shell 210 can move in the axial direction relative to the first shell 100.

[0039] In this embodiment, when the first shell 100 is rotated until the linkage block 211 is aligned with the unlocking groove 120, the second shell 210 can move along the axial direction of the first shell 100, thereby driving the needle body 220 to move along the axial direction of the first shell 100 into the interior of the first shell 100, thereby avoiding cross infection or other medical contamination caused by the used blood collection needle during collection, transportation and processing.

[0040] like Figure 1-Figure 7 As shown, based on the above embodiment, it also includes a third shell 300, the first shell 100 is connected to the third shell 300 and can rotate in the circumferential direction relative to the third shell 300, and the second shell 210 is connected to the third shell 300 and can move in the axial direction relative to the third shell 300.

[0041] In this embodiment, the first shell 100 can rotate along the circumferential direction of the third shell 300. When the first shell 100 rotates until the linkage block 211 is aligned with the unlocking groove 120, the second shell 210 can move along the axial direction of the third shell 300 to the inside of the first shell 100.

[0042] like Figure 1-Figure 7 As shown, based on the above embodiment, a return spring 400 is further included, and the return spring 400 can push the second shell 210 to approach the first shell 100.

[0043] In this embodiment, when the linkage block 211 is aligned with the unlocking slot 120, the reset spring 400 is reset without pressure, thereby spontaneously pushing the second shell 210 to move closer to the first shell 100, reducing the operator's manual action of pulling back the needle and improving the efficiency of collecting blood samples.

[0044] like Figure 1-Figure 7 As shown, on the basis of the above embodiment, the first shell 100 is also provided with a positioning block 130, and the third shell 300 is also provided with a first positioning groove 310 and a second positioning groove 320. When the first shell 100 rotates relative to the third shell 300, the positioning block 130 is driven to move to the first positioning groove 310 or the second positioning groove 320. When the positioning block 130 is located in the first positioning groove 310, the linkage block 211 is aligned with the locking block 110. When the positioning block 130 is located in the second positioning groove 320, the linkage block 211 is aligned with the unlocking groove 120.

[0045] In this embodiment, when the first shell 100 drives the positioning block 130 to rotate to the first positioning groove 310, the linkage block 211 is aligned with the locking block 110 so that the second shell 210 cannot move. When the first shell 100 drives the positioning block 130 to rotate to the second positioning groove 320, the linkage block 211 is aligned with the unlocking groove 120 so that the second shell 210 can move along the axial direction of the first shell 100.

[0046] like Figure 1-Figure 7 As shown, based on the above embodiment, the positioning block 130 is provided with a movable inclined surface 131 , and when the positioning block 130 moves from the first positioning groove 310 to the second positioning groove 320 , the movable inclined surface 131 passes through the side wall of the first positioning groove 310 .

[0047] In this embodiment, a movable inclined surface 131 is disposed on the positioning block 130 so that the positioning block 130 can rotate from the first positioning groove 310 to the second positioning groove 320 along the direction of the movable inclined surface 131 .

[0048] like Figure 1-Figure 7As shown, on the basis of the above embodiment, the first positioning groove 310 is provided with a fixed inclined surface 311 , and the positioning block 130 passes through the fixed inclined surface 311 when moving from the first positioning groove 310 to the second positioning groove 320 .

[0049] In this embodiment, when the positioning block 130 moves, the movable inclined surface 131 contacts the fixed inclined surface 311 of the first positioning groove 310 , so that the positioning block 130 can smoothly move from the first positioning groove 310 to the second positioning groove 320 .

[0050] like Figure 1-Figure 7 As shown, on the basis of the above embodiment, the first shell 100 is further provided with a limiting block 140, and the third shell 300 is further provided with a limiting groove 330. When the first shell 100 rotates relative to the third shell 300, the limiting block 140 is driven to move in the limiting groove 330. When the limiting block 140 contacts one side wall of the limiting groove 330, the linkage block 211 is aligned with the locking block 110. When the limiting block 140 contacts the other side wall of the limiting groove 330, the linkage block 211 is aligned with the unlocking groove 120.

[0051] In this embodiment, when the linkage block 211 rotates from being aligned with the locking block 110 to being aligned with the unlocking slot 120, the positioning block 130 rotates from the first positioning slot 310 to the second positioning slot 320, and the limit block 140 contacts a side wall of the limit slot 330. At this time, the first shell 100 cannot continue to rotate, so that the positioning block 130 cannot be rotated back to the first positioning slot 310.

[0052] like Figure 1-Figure 7 As shown, based on the above embodiment, the first shell 100 is further provided with a movable blocking portion 150, and the second shell 210 is further provided with a fixed blocking portion 230. The movable blocking portion 150 can contact the fixed blocking portion 230 to limit the axial movement of the second shell 210 along the first shell 100.

[0053] In this embodiment, when the second shell 210 moves along the axial direction of the first shell 100 to the point where the fixed blocking portion 230 passes over the movable blocking portion 150, the action of the reset spring 400 can drive the second shell 210 to move in the opposite direction, so that the movable blocking portion 150 contacts the fixed blocking portion 230, thereby restricting the second shell 210 from moving in the opposite direction along the axial direction of the first shell 100, thereby preventing the needle body 220 from extending again.

[0054] like Figure 1-Figure 7As shown, on the basis of the above embodiment, the first shell 100 is further provided with a first clamping portion 160 , and the third shell 300 is provided with a second clamping portion 340 , and the second clamping portion 340 can be clamped with the first clamping portion 160 .

[0055] In this embodiment, the first housing 100 is engaged with the third housing 300 via the second engaging portion 340 and the first engaging portion 160 , so as to prevent the first housing 100 from falling off when rotating along the circumferential direction of the third housing 300 .

[0056] like Figure 1-Figure 7 As shown, based on the above embodiment, it also includes a protective cap 500, which is detachably connected to the second shell 210. When the protective cap 500 is connected to the second shell 210, it blocks the portion of the needle 220 extending out of the second shell 210.

[0057] In this embodiment, the protective cap 500 covers the portion of the needle body 220 extending out of the second housing 210 to prevent the extended needle body 220 from causing injury to personnel. When the blood collection needle needs to be used, the protective cap 500 can be removed.

[0058] In addition, the blood collection needle also includes a butterfly-shaped fixing device, which is used to fix the blood collection needle on the patient's skin surface to prevent the blood collection needle from falling off.

Claims

1. A rotating automatic needle collection needle, characterized in that: include: A first housing, which is provided with a locking block and an unlocking slot; A blood collection needle assembly, comprising a second shell and a needle body, wherein the second shell can rotate in a circumferential direction relative to the first shell, the needle body is connected to the second shell and extends out of one end of the second shell, and a linkage block is provided at the other end of the second shell, and when the second shell rotates relative to the first shell, the linkage block can be aligned with the locking block or the unlocking groove, when the linkage block is aligned with the locking block, the second shell is restricted from moving in an axial direction relative to the first shell, and when the linkage block is aligned with the unlocking groove, the second shell can move in the axial direction relative to the first shell.

2. A rotary automatic needle collection needle as claimed in claim 1, characterized in that: It also includes a third shell, the first shell is connected to the third shell and can rotate relative to the third shell in a circumferential direction, and the second shell is connected to the third shell and can move relative to the third shell in an axial direction.

3. A rotary automatic needle collection needle as claimed in claim 2, characterized in that: A return spring is also included, and the return spring can push the second housing to approach the first housing.

4. A rotary automatic needle collection needle as claimed in claim 2, characterized in that: The first shell is also provided with a positioning block, and the third shell is also provided with a first positioning groove and a second positioning groove. When the first shell rotates relative to the third shell, the positioning block is driven to move to the first positioning groove or the second positioning groove. When the positioning block is located in the first positioning groove, the linkage block is aligned with the locking block, and when the positioning block is located in the second positioning groove, the linkage block is aligned with the unlocking groove.

5. A rotary automatic needle collection needle as claimed in claim 4, characterized in that: The positioning block is provided with a movable inclined surface, and when the positioning block moves from the first positioning groove to the second positioning groove, it passes through the side wall of the first positioning groove via the movable inclined surface.

6. A rotary automatic needle collection needle as claimed in claim 4, characterized in that: The first positioning groove is provided with a fixed inclined surface, and the positioning block passes through the fixed inclined surface when moving from the first positioning groove to the second positioning groove.

7. A rotary automatic needle collection needle as claimed in claim 2, characterized in that: The first shell is also provided with a limiting block, and the third shell is also provided with a limiting groove. When the first shell rotates relative to the third shell, the limiting block is driven to move in the limiting groove. When the limiting block contacts one side wall of the limiting groove, the linkage block is aligned with the locking block. When the limiting block contacts the other side wall of the limiting groove, the linkage block is aligned with the unlocking groove.

8. The rotary automatic needle collection needle as claimed in claim 3, characterized in that: The first shell is further provided with a movable blocking portion, and the second shell is further provided with a fixed blocking portion, and the movable blocking portion can contact the fixed blocking portion to limit the axial movement of the second shell along the first shell.

9. The rotary automatic needle collection needle as claimed in claim 2, characterized in that: The first shell is further provided with a first clamping portion, and the third shell is provided with a second clamping portion, and the second clamping portion can be clamped with the first clamping portion.

10. The rotary automatic needle collection needle as claimed in claim 1, characterized in that: It also includes a protective cap, which is detachably connected to the second shell body. When the protective cap is connected to the second shell body, it covers the portion of the needle body extending out of the second shell body.

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