Heel blood collector

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a heel hemostix which comprises a shell, blades and a blade outlet, the shell comprises a main shell and an outer cap which can be separated, an upper shell of the main shell and a lower shell of the main shell are connected in a buckled mode, the front end of a near-end cutting edge is in a protruding arc shape, the inner wall of the upper shell of the main shell is provided with blade limiting blocks which are oppositely arranged, and the blade limiting blocks are arranged on the outer cap of the main shell. The lower portion of the push-pull part sequentially penetrates through a connecting body sliding groove in an upper shell of the main shell and a connecting groove in the blade, a torsional spring is arranged in the main shell, and the torsional spring is arranged on a torsional spring fixing shaft in a sleeving mode. The outer cap is pulled out, the near-end cutting edge is exposed and disinfected, the push-and-pull key is pressed by fingers and pushed to the far end, the push-and-pull key drives the blade to move to the far end through the cooperation of the connector at the lower end and the torsional spring, the torsional spring generates force for restoring deformation, after the blade reaches the terminal position, the cutting edge is completely contracted into the main shell, and the knife outlet abuts against the action area, so that the knife is completely cut off. When the push-and-pull key is loosened, the near-end cutting edge rushes out of the cutting edge to cut the skin, the shape of the near-end cutting edge is changed, and the near-end cutting edge is not prone to breakage.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, in particular to a heel blood sampling device. Background Art

[0002] A blood sampling device is a common blood sampling tool used in hospitals. In newborn heel screening, due to the physical condition of newborns, heel blood sampling is mostly used to screen for three genetic diseases. Most existing heel blood sampling devices use the tip of the knife to draw blood from the foot of the newborn, and the blood can only be drawn from the protruding part of the heel. This application aims to improve this. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides a heel blood sampler, which has the advantages of simple structure and convenient use, and solves the problems mentioned in the above background technology.

[0004] The utility model is a heel blood sampling device, comprising a shell, a blade and a knife outlet, the shell comprising a main shell and an outer cap, the main shell and the outer cap are separable, the upper shell comprising an upper shell of the main shell, the lower shell comprising a lower shell of the main shell, the upper shell of the main shell and the lower shell of the main shell are buckled and connected, the middle position of the proximal blade of the blade is an arc convex toward the proximal end, the inner wall of the upper shell of the main shell is provided with relatively arranged blade limit blocks, a blade accommodating groove is formed between the relatively arranged blade limit blocks, a push-pull part is provided on the main shell, the lower part of the push-pull part passes through the connecting body slide groove of the upper shell of the main shell and the connecting groove on the blade in sequence, the push-pull part drives the blade to move axially along the blade accommodating groove, the inner wall of the main shell is provided with a torsion spring fixing shaft, the torsion spring is sleeved on the torsion spring fixing shaft, the proximal end of the torsion spring is limited in the push-pull part and contacts with the lower surface of the blade, and the distal end of the torsion spring abuts against the first limit strip.

[0005] The push-pull part includes a push-pull button for hand push-pull operation and a connecting body connected below the push-pull button, the lower surface of the connecting body passes through the connecting groove, the proximal end of the torsion spring is limited in the connecting body and contacts with the lower surface of the blade, the inner wall of the lower shell of the main shell is provided with a third limit block, after the main shell is buckled, it abuts against the lower surface of the blade to limit the vertical displacement of the blade, the horizontal width of the third limit block in the axial vertical direction of the main shell is smaller than the spacing between the relatively arranged blade limit blocks, that is, the vertical projection of the third limit block on the upper shell of the main shell is located between the relatively arranged blade limit blocks.

[0006] The lower surface of the connecting body is provided with a torsion spring installation opening and a torsion spring accommodating cavity. The torsion spring installation opening and the torsion spring accommodating cavity are communicated, and the axial direction of the torsion spring installation opening and the axial direction of the torsion spring accommodating cavity are perpendicular to each other.

[0007] The proximal blade is an axially symmetrical structure, and the size of the blade outlet is larger than the widest size of the proximal blade when in use, allowing the proximal blade to extend and retract at the blade outlet. In the initial state, the proximal blade extends out of the blade outlet.

[0008] The length of the push-pull groove determines the moving distance of the connector. The push-pull groove is a key slide groove. The displacement of the connector provides the torsion spring with power to restore deformation, so that the proximal blade quickly cuts through the action area.

[0009] The buckling connection between the main housing upper shell and the main housing lower shell is achieved by providing mutually matching buckling grooves and buckling protrusions on the buckling surfaces between the two.

[0010] The outer cap is open at the distal end, and an outer cap groove is formed from the distal end of the outer cap toward the proximal end to protect the proximal blade.

[0011] The outer cap is integrally formed.

[0012] The distal end of the torsion spring is provided with a hook portion perpendicular to the first limiting strip, and the hook portion cooperates with the limiting groove on the first limiting strip to limit the distal end of the torsion spring.

[0013] The outer cap comprises an outer cap upper shell and an outer cap lower shell, and the outer cap upper shell and the outer cap lower shell are buckled together.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the main shell and the outer cap are detachable, protecting the proximal blade when not in use, and the outer cap can be pulled out when in use. The proximal blade is exposed, and the proximal blade is disinfected again. The push-pull button is pressed by the finger and pushed toward the distal end. The push-pull button drives the blade to move toward the distal end through the cooperation of the connector at the lower end and the torsion spring, and the torsion spring generates a force to restore the deformation. After reaching the terminal position, the blade is completely retracted into the main shell, and the blade outlet is abutted against the action area of ​​the user. Release the push-pull button, and the proximal blade can rush out of the blade outlet quickly to cut the skin, changing the shape of the proximal blade and making it not easy to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall top view of the heel blood sampler of the utility model in specific embodiment 1;

[0016] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the upper shell of the main housing and the connecting part of the outer cap and the upper shell of the main housing of the utility model in specific embodiment 1;

[0017] Figure 3 This is an enlarged three-dimensional structural example diagram of the push-pull portion of the heel blood sampling device of the utility model in specific embodiment 1;

[0018] Figure 4 This is an enlarged front view of the push-pull portion of the heel blood sampling device of the utility model in specific embodiment 1;

[0019] Figure 5 This is a schematic diagram of the lower shell structure of the main shell of the heel blood sampler of the utility model in specific embodiment 1.

[0020] In the figure: 1. main shell; 11. upper shell of main shell; 12. lower shell of main shell; 2. outer cap; 3. blade; 31. proximal blade; 32. connecting groove; 4. blade outlet; 5. blade limit block; 51. blade accommodating groove; 52. connector slide groove; 6. push-pull part; 61. push-pull button; 62. connector; 621. torsion spring installation opening; 622. torsion spring accommodating cavity; 63. button slide groove; 7. torsion spring; 71. torsion spring fixing shaft; 8. first limit strip; 9. third limit block; 10. snap-fit ​​groove; 101. snap-fit ​​protrusion. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Specific embodiment 1: Please refer to Figure 1-5For the convenience of description, the proximal end mentioned in the full text is defined as the direction in which the heel blood sample is close to the user's action area. When in use, the end of the heel blood sample farthest from the user is defined as the distal end. The heel blood collector comprises a shell, a blade 3 and a knife outlet 4, wherein the shell comprises a main shell 1 and an outer cap 2, wherein the main shell 1 and the outer cap 2 are separable, the upper shell comprises a main shell upper shell 11, and the lower shell comprises a main shell lower shell 12, wherein the main shell upper shell 11 and the main shell lower shell 12 are snap-fitted and connected, and the middle position of the proximal blade 31 of the blade 3 is an arc convex toward the proximal end, which changes the shape of the tip of one side of the existing blade. Combining the structure of the utility model and the puncturing knife outlet method, the tip of the blade can be better protected and the tip of the blade is not easy to break. Moreover, the improved proximal blade 31 can ensure that both the puncturing depth and the puncturing width are reached during puncturing, and both are taken into consideration. If the puncturing method in the utility model is adopted or the existing one-side blade outlet method is used, the puncturing depth and width cannot be well matched, either the width is appropriate, but the puncturing depth is too deep, resulting in a deep wound, or the deepest tip of the blade reaches a sufficient depth, but the width is not enough, the bleeding point is not enough, and it is not conducive to blood collection. The inner wall of the upper shell 11 of the main shell is provided with blade limiting blocks 5 which are arranged opposite to each other, and a blade accommodating groove 51 is formed between the blade limiting blocks 5 which are arranged opposite to each other. The main shell 1 is provided with a push-pull portion 6. In this specific embodiment, the upper shell 11 of the main shell is provided with a push-pull portion 6, and the lower part of the push-pull portion 6 passes through the connecting body slide groove 52 of the upper shell 11 of the main shell and the connecting groove 32 on the blade 3 in sequence. The push-pull portion 6 drives the blade 3 to move axially along the blade accommodating groove 51. The inner wall of the main shell 1 is provided with a torsion spring fixing shaft 71, and the torsion spring 7 is sleeved on the torsion spring fixing shaft 71. The proximal end of the torsion spring 7 is confined in the push-pull portion 6 and contacts with the lower surface of the blade 3, and the distal end of the torsion spring 7 abuts against the first limiting strip 8. Figure 2 shown.

[0023] The push-pull part 6 includes a push-pull button 61 for hand push-pull operation and a connector 62 connected below the push-pull button 61. A button slide groove 63 is provided on the surface of the upper shell 11 of the main shell for placing the push-pull button 61, and the push-pull button 61 can slide along the button slide groove 63 to prevent misoperation, sliding or pushing the push-pull button 61. The upper surface of the push-pull button 61 is provided with raised horizontal lines to increase the contact area between the finger and the push-pull button 61, increase friction, make it easier to apply force and prevent slipping. The lower surface of the connecting body 62 passes through the connecting groove 32, the proximal end of the torsion spring 7 is limited in the connecting body 62 and contacts the lower surface of the blade 3, the inner wall of the lower shell 12 of the main housing is provided with a third limit block 9, after the main housing 1 is buckled, it abuts against the lower surface of the blade 3 to limit the vertical displacement of the blade 3, the horizontal width of the third limit block 9 in the axial vertical direction of the main housing 1 is smaller than the spacing between the relatively arranged blade limit blocks 5, that is, the vertical projection of the third limit block 9 on the upper shell 11 of the main housing is located between the relatively arranged blade limit blocks. In this specific embodiment, the third limit block 9 is arranged parallel to the axial direction of the main housing, which can not only prevent the vertical displacement of the blade 3 from deviating beyond the upper and lower edges of the blade outlet, but also prevent the blade 3 from hitting the third limit block and being restricted in movement when the vertical displacement is slightly offset. The vertical position of the blade 3 is limited by the cooperation of the proximal end of the torsion spring 7 and the connector 62, and the third limit block 9 is used to further prevent the vertical position of the blade 3 from being greatly offset, which would affect the proximal blade 31 from exiting the knife opening 4. The height of the knife opening 4 can be greater than twice the thickness of the blade 3. If it is too small, the other structural precision requirements of the heel blood collection device will be higher. If it is too large, the use effect will be poor. Therefore, the knife opening 4 is arranged at the proximal end of the upper shell 11 of the main shell body, and the corresponding position of the knife opening 4 of the lower shell 12 of the main shell body is the edge boss of the lower shell 12 of the main shell body, and the edge boss of this part serves as the lower wall of the knife opening 4.

[0024] The lower surface of the connecting body 62 is provided with a torsion spring installation opening 621 and a torsion spring accommodating cavity 622. The torsion spring installation opening 621 and the torsion spring accommodating cavity 622 are communicated with each other, and the axial direction of the torsion spring installation opening 621 and the axial direction of the torsion spring accommodating cavity 622 are perpendicular to each other.

[0025] The proximal blade 31 is an axially symmetrical structure, and the size of the blade outlet 4 is larger than the widest size of the proximal blade 31 when in use, allowing the proximal blade 31 to extend and retract from the blade outlet 4. In the initial state, the proximal blade 31 extends out of the blade outlet 4.

[0026] The length of the push-pull groove determines the moving distance of the connector 62 , and the displacement of the connector 62 provides the torsion spring 7 with power to restore deformation, so that the proximal blade 31 can quickly cut through the active area.

[0027] The main housing upper shell 11 and the main housing lower shell 12 are buckled together by providing a buckling groove 10 and a buckling protrusion 101 that cooperate with each other on the buckling surface between the two to achieve a buckling connection. The inner wall of the main housing upper shell 11, near the upper top wall, is provided with a buckling groove 10, and the buckling groove 10 is axially symmetrically arranged, such as Figure 2 As shown, two snap-fit ​​grooves 10 are provided on one side, and after axial symmetry, there are a total of 4 axial grooves. The snap-fit ​​contact surface of the lower shell 12 of the main shell is stepped, and the snap-fit ​​protrusion 101 is located on the side wall of the upper edge boss of the lower shell 12 of the main shell, and cooperates with the snap-fit ​​groove 10. When the upper shell 11 of the main shell and the lower shell 12 of the main shell are snapped together, the snap-fit ​​protrusion is inserted into the snap-fit ​​groove 10. The snap-fit ​​technology can be understood by those skilled in the art and will not be repeated.

[0028] The outer cap 2 is open at the distal end, and a groove of the outer cap 2 is formed from the distal end of the outer cap 2 to the proximal end, which is used to protect the proximal blade 31 of the blade. A person skilled in the art can know that the connection between the outer cap 2 and the main shell can be snapped in or magnetically attracted, which is not shown in the accompanying drawings and does not affect the understanding of the inventive point of this specific embodiment by those skilled in the art.

[0029] The outer cap 2 is integrally formed.

[0030] Usage process: The main shell 1 and the outer cap 2 are detachable, and the proximal blade 31 is protected when not in use. The outer cap 2 can be pulled out when in use. The proximal blade 31 is exposed, and the medical staff can disinfect the proximal blade 31 again. After disinfection, the push-pull button 61 is pressed by the finger and pushed to the far end. The push-pull button 61 drives the blade 3 to move to the far end through the cooperation of the connector 62 at the lower end and the torsion spring 7, and the torsion spring 7 generates a force to restore the deformation. After reaching the terminal position, the blade is completely retracted into the main shell 1, and the blade outlet 4 is abutted against the action area of ​​the user. Release the push-pull button 61, and the proximal blade 31 can rush out of the blade outlet 4 at a high speed to cut the skin, changing the shape of the proximal blade 31 and making it not easy to break.

[0031] Specific embodiment 2: The difference between this specific embodiment and specific embodiment 1 is that the distal end of the torsion spring 7 is provided with a hook portion perpendicular to the first limiting strip 8, and the hook portion cooperates with the limiting groove on the first limiting strip 8 to limit the distal end of the torsion spring 7. The distal end position of the torsion spring 7 is further limited.

[0032] Specific embodiment 3: The difference between this specific embodiment and specific embodiment 1 is that the outer cap 2 includes an outer cap upper shell and an outer cap lower shell, and the outer cap upper shell and the outer cap lower shell are buckled together.

[0033] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Heel blood sampling device, including a housing, a blade and a blade outlet, Features: The shell comprises a main shell and an outer cap, and the main shell and the outer cap are separable, the upper shell comprises an upper shell of the main shell, and the lower shell comprises a lower shell of the main shell, the upper shell of the main shell and the lower shell of the main shell are buckled and connected, the middle position of the proximal blade of the blade is an arc convex toward the proximal end, the inner wall of the upper shell of the main shell is provided with relatively arranged blade limit blocks, and a blade accommodating groove is formed between the relatively arranged blade limit blocks, a push-pull part is provided on the main shell, the lower part of the push-pull part passes through the connecting body slide groove of the upper shell of the main shell and the connecting groove on the blade in sequence, and the push-pull part drives the blade to move axially along the blade accommodating groove, the inner wall of the main shell is provided with a torsion spring fixing shaft, the torsion spring is sleeved on the torsion spring fixing shaft, the proximal end of the torsion spring is limited in the push-pull part and contacts with the lower surface of the blade, the distal end of the torsion spring abuts against the first limit strip, and the length of the push-pull groove determines the moving distance of the connecting body.

2. The heel blood collection device according to claim 1, Features: The push-pull part includes a push-pull button operated by hand push-pull and a connecting body connected below the push-pull button, the lower surface of the connecting body passes through the connecting groove, the proximal end of the torsion spring is limited in the connecting body and contacts with the lower surface of the blade, and the inner wall of the lower shell of the main shell is provided with a third limit block, which abuts against the lower surface of the blade after the main shell is buckled to limit the vertical displacement of the blade, and the horizontal width of the third limit block in the axial direction perpendicular to the main shell is smaller than the spacing between the relatively arranged blade limit blocks.

3. The heel blood collection device according to claim 2, Features: A torsion spring installation opening and a torsion spring accommodating cavity are provided on the lower surface of the connecting body. The torsion spring installation opening and the torsion spring accommodating cavity are communicated with each other, and the axial direction of the torsion spring installation opening and the axial direction of the torsion spring accommodating cavity are perpendicular to each other.

4. The heel blood sampling device according to claim 3, Features: The proximal blade is an axially symmetrical structure, and the size of the blade outlet is larger than the widest size of the proximal blade when in use, allowing the proximal blade to extend and retract at the blade outlet. In the initial state, the proximal blade extends out of the blade outlet.

5. The heel blood collection device according to claim 1, Features: The buckling connection between the main housing upper shell and the main housing lower shell is achieved by providing mutually matching buckling grooves and buckling protrusions on the buckling surfaces between the two.

6. The heel blood collection device according to claim 1, Features: The outer cap is open at the distal end, and an outer cap groove is formed from the distal end of the outer cap toward the proximal end to protect the proximal blade.

7. The heel blood collection device according to claim 6, Features: The outer cap is integrally formed.

8. The heel blood sampling device according to claim 4, Features: The distal end of the torsion spring is provided with a hook portion perpendicular to the first limiting strip, and the hook portion cooperates with the limiting groove on the first limiting strip to limit the distal end of the torsion spring.

9. The heel blood sampling device according to claim 7, Features: The outer cap comprises an outer cap upper shell and an outer cap lower shell, and the outer cap upper shell and the outer cap lower shell are buckled together.

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