Needle holder fixing device and sectioning device

Abstract

The utility model discloses a needle holder fixing device and a sectioning device. The needle holder fixing device comprises a base and a supporting structure. The supporting structure comprises a first supporting column and a second supporting column, the first supporting column and the second supporting column are coaxially arranged, the first supporting column is connected to the base through the second supporting column, the first supporting column is matched with the threaded opening of the needle holder, and the second supporting column is matched with the inner cavity of the needle holder. The supporting structure is further provided with a cutting channel, the cutting channel at least extends from the free end of the first supporting column to the connecting end of the first supporting column and the second supporting column in the axial direction, the width of the cutting channel is larger than the thickness of the cutting device, and the cutting channel can guide the cutting device to move in the axial direction. The needle holder can be fixed, the interior of the needle holder can be supported, the cutting device is guided to move in the axial direction through the cutting channel, movement and deformation in the sectioning process can be reduced, and the flatness of a sectioning plane can be improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device testing technology, and in particular to a needle holder fixing device and a cutting device. Background Technology

[0002] In related technologies, the threaded opening on the needle holder needs to be manually cut to inspect the thickness and tolerance dimensions of the thread. However, during the manual cutting process, the needle holder may deform and move around, resulting in an uneven cut surface of the threaded opening, which in turn causes significant deviations in various dimensions of the thread. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a needle holder fixing device that can fix the needle holder and support its internal structure, thereby reducing movement and deformation during the cutting process.

[0004] This utility model also proposes a cutting device.

[0005] A first aspect of this utility model provides a needle holder fixing device. The needle holder fixing device includes a base and a support structure. The support structure includes a first support column and a second support column, which are coaxially arranged. The first support column is connected to the base via the second support column. The first support column is adapted to the threaded port of the needle holder, and the second support column is adapted to the inner cavity of the needle holder. A cutting channel is also provided on the support structure. The cutting channel extends axially from the free end of the first support column to the connection end between the first and second support columns. The width of the cutting channel is greater than the thickness of the cutting device, and the cutting channel can guide the axial movement of the cutting device.

[0006] In some embodiments, the cutting channel extends along the axial direction to the base.

[0007] In some embodiments, the cutting channel includes a first cutting groove and a second cutting groove that penetrate the circumferential surface of the support structure in different radial directions.

[0008] In some embodiments, the first cutting groove and the second cutting groove penetrate the circumferential surface of the support structure in a vertical radial direction.

[0009] In some embodiments, the support structure protrudes from the upper surface of the base; the upper surface of the base also protrudes with a rotation limiting portion, the rotation limiting portion being spaced apart from the support structure to form a locking groove for locking the radial flange of the needle holder.

[0010] In some embodiments, the rotation limiting part is provided with an avoidance opening, which extends through the upper surface of the rotation limiting part along the axial direction of the support structure, and the extension direction of the avoidance opening is located in the same radial plane as the cutting channel to avoid the cutting device.

[0011] In some embodiments, the axial extension dimension of the first support post is configured to be greater than the axial extension dimension of the needle holder thread.

[0012] In some embodiments, the base is constructed as a cylindrical structure coaxial with the support structure.

[0013] A second aspect of this utility model provides a slitting device, which includes a cutting device and a fixing device according to a first aspect of this utility model; the cutting device is used to move axially in the cutting channel of the needle holder fixing device.

[0014] In some embodiments, the cutting device is configured as a blade structure and the thickness of the blade is less than the width of the cutting channel.

[0015] Based on the technical solution, it can be seen that the embodiments provided by this utility model have the following advantages: (1) When the cutting device cuts the threaded opening of the needle holder, the needle holder is coaxially fixed on the outer periphery of the support structure. The support structure supports the needle holder from the inside of the needle holder, which can reduce the deformation and movement of the needle holder during the cutting process, improve the flatness of the cutting, and thus help improve the accuracy of the measurement.

[0016] (2) When the needle holder is coaxially fixed on the outer periphery of the support structure, since the cutting channel penetrates the circumferential surface of the support structure radially, the axis of the support structure is located in the cutting channel, that is, the axis of the needle holder is also located in the cutting channel. As a result, during the process of the cutting device cutting the needle holder along the cutting channel, the cutting channel can guide the cutting device to cut through the axis of the needle holder, assisting in aligning the cutting surface through the axis of the needle holder, which is beneficial to improving the cutting efficiency and detection efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the needle holder fixing device according to an embodiment of the present utility model;

[0019] Figure 2This is a schematic diagram of the assembly of the needle holder fixing device and the needle holder according to an embodiment of the present utility model;

[0020] Figures 3-4 This is a schematic diagram of the needle holder in related technologies;

[0021] Figure 5 This is a partially enlarged view of the assembly of the needle holder fixing device and the needle holder according to an embodiment of the present utility model;

[0022] Figures 6-8 These are schematic diagrams of the needle holder fixing device from different perspectives according to embodiments of the present utility model;

[0023] Figure 9 This is a schematic diagram of the cutting device according to an embodiment of the present utility model.

[0024] Figure label:

[0025] Cutting device 1000, needle holder 2000, needle holder inner cavity 2001, needle holder threaded opening 2002, radial flange 2003;

[0026] Needle holder fixing device 100, cutting device 200;

[0027] Base 1, rotation limiting part 11, clearance opening 111, snap-fit ​​groove 112;

[0028] Support structure 2, first support column 21, second support column 22, cutting channel 23, first cutting groove 231, second cutting groove 232. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In related technologies, the needle holder is a cylindrical product with a threaded opening at its axis, through which it is screwed onto the blood collection needle. There are relevant standards for the thread structure, such as the Luer locking connector specified in GB / T1962.2, which defines in detail the thread pitch, helix angle, thread length, single / double threads, and left / right helixes. However, the thread thickness and tolerance dimensions are not defined in detail. Therefore, the compatibility between the needle holder and the blood collection needle is poor, resulting in incompatibility. Therefore, studying the thread dimensions is crucial for new product design and testing. Before the needle holder is put into use, the relevant parameters of the threaded opening, especially the thread thickness and tolerance dimensions, need to be tested to improve its compatibility with the blood collection needle.

[0033] Currently, before testing whether the threads of a product meet the design requirements, it is necessary to cut the threaded part with a cutter. Since the needle holder product is cylindrical, it is difficult to ensure that the cut surface passes through the center line of the cylinder by visually observing the center line of the cylinder and then manually cutting. At the same time, the needle holder will deform and move during the cutting process, resulting in an uneven cut surface and causing large deviations in the measurement of various dimensions of the threads.

[0034] The following is for reference. Figures 1-9 The present invention describes a needle holder fixing device 100 and a cutting device 1000 according to embodiments of the present invention.

[0035] Example 1

[0036] like Figure 1 As shown, a first aspect embodiment of this utility model provides a needle holder fixing device 100. The needle holder fixing device 100 includes a base 1 and a support structure 2. The support structure 2 includes a first support column 21 and a second support column 22, which are coaxially arranged. The first support column 21 is connected to the base 1 through the second support column 22. The first support column 21 is adapted to the threaded port 2002 of the needle holder, and the second support column 22 is adapted to the inner cavity 2001 of the needle holder.

[0037] like Figure 1 As shown, the support structure 2 is also provided with a cutting channel 23. The cutting channel 23 extends at least axially from the free end of the first support column 21 to the connection end between the first support column 21 and the second support column 22. The width of the cutting channel 23 is greater than the thickness of the cutting device 200. The cutting channel 23 can guide the cutting device 200 to move axially.

[0038] like Figure 2 As shown, the first support post 21 is adapted to the threaded opening 2002 of the needle holder, and the second support post 22 is adapted to the inner cavity 2001 of the needle holder. This means that the diameter of the first support post 21 is adapted to the inner diameter of the threaded opening 2002 so that the threaded opening can be fitted onto the outer circumference of the first support post 21, and the axial dimension of the first support post 21 is greater than or equal to the extension dimension of the threaded opening 2002; the diameter of the second support post 22 is adapted to the inner diameter of the inner cavity 2001 of the needle holder to form a clearance fit or an interference fit. Therefore, the specific diameter and axial extension length of the first support post 21, and the specific diameter of the second support post 22, can be adjusted by those skilled in the art according to the actual needle holder 2000 product.

[0039] like Figure 1 , Figure 3 and Figure 4 As shown, it should be further explained that the first support column 21 and the second support column 22 are coaxially arranged cylindrical shapes to fit the needle holder threaded port 2002 and the needle holder inner cavity 2001.

[0040] The cutting channel 23 extending axially from the free end of the first support column 21 to the connection end between the first support column 21 and the second support column 22 means that the cutting channel 23 needs to completely penetrate the axial length of the first support column 21 to form a complete cut surface for the threaded opening.

[0041] Here, "penetrating the circumferential surface of the support structure 2 in the radial direction" means that the extension direction of the cutting channel 23 includes a radial component, that is, the cutting channel 23 cuts into the interior of the support structure 2 radially from the circumferential surface and penetrates the circumferential surface in at least one radial direction. For example, the cutting channel 23 penetrates the circumferential surface from both sides in one radial direction, which is beneficial for avoiding the cutting device 200.

[0042] In a specific application scenario, the inner cavity of the needle holder 2000 is axially inserted into the second support column 22 from the first support column 21. The threaded opening 2002 of the needle holder is correspondingly fitted onto the outer periphery of the first support column 21, and the inner cavity 2001 of the needle holder is correspondingly fitted onto the outer periphery of the second support column 22. Thus, the needle holder 2000 is coaxially fixed to the outer periphery of the support structure 2, and the support structure 2 supports the needle holder 2000 from within. The cutting channel 23 extends axially from the first support column 21 to the second support column 22 and radially penetrates the circumferential surface of the support structure 2, forming a through guide channel. The cutting channel 23 allows the cutting device 200 (such as a blade) to move stably along the axial direction of the support structure 2 (i.e., the axial direction of the needle holder 200), enabling the cutting action to be performed precisely in a preset direction (axial direction) and reducing blade deviation.

[0043] like Figure 2 As shown, this means that the needle holder 2000 can be coaxially fixed on the outer periphery of the support structure 2. The support structure 2 supports the needle holder 2000 from the inside. The cutting channel 23 extends axially from the first support column 21 to the second support column 22 and radially penetrates the circumferential surface of the support structure 2, forming a through-cutting device 200 guide channel.

[0044] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages:

[0045] (1) When the cutting device 200 cuts the threaded opening of the needle holder 2000, the needle holder 2000 is coaxially fixed on the outer periphery of the support structure 2. The support structure 2 supports the needle holder 2000 from the inside, which can reduce the deformation and movement of the needle holder 2000 during the cutting process, improve the flatness of the cutting, and thus help improve the accuracy of measurement.

[0046] (2) When the needle holder 2000 is coaxially fixed on the outer periphery of the support structure 2, since the cutting channel 23 radially penetrates the circumferential surface of the support structure 2, the axis of the support structure 2 is located in the cutting channel 23, that is, the axis of the needle holder 2000 is also located in the cutting channel 23. As a result, during the process of the cutting device 200 cutting the needle holder 2000 along the cutting channel 23, the cutting channel 23 can guide the cutting device 200 to cut through the axis of the needle holder 2000, and assist in aligning the cutting surface through the axis of the needle holder 2000, which is beneficial to improving the cutting efficiency and detection efficiency.

[0047] In a specific example, the first support column 21 is a cylindrical structure, the second support column 22 is a cylindrical structure, and the base 1 is constructed as a cylindrical structure coaxial with the support structure 2.

[0048] like Figure 1 As shown, the cutting channel 23 extends along the axis to the base 1. That is to say, the cutting channel 23 starts from the free end of the first support column 21, passes through the first support column 21 and the second support column 22 in sequence, and extends to the connection end between the second support column 22 and the base 1.

[0049] like Figure 5 As shown, the cutting channel 23 further includes a first cutting groove 231 and a second cutting groove 232, which penetrate the circumferential surface of the support structure 2 in different radial directions. That is, the first cutting groove 231 extends along the axial direction of the support structure 2 and cuts into the interior of the support structure 2 from the circumferential surface in one radial direction, penetrating the circumferential surface at least on one side in one radial direction; the second cutting groove 232 extends along the axial direction of the support structure 2 and cuts into the interior of the support structure 2 from the circumferential surface in another radial direction, penetrating the circumferential surface at least on one side in the other radial direction.

[0050] like Figure 6 As shown, in a specific example, the first cutting groove 231 penetrates the circumferential surface of the support structure 2 from both sides in a radial direction, and the second cutting groove 232 penetrates the circumferential surface of the support structure 2 from both sides in another radial direction.

[0051] like Figure 6As shown, further, the first cutting groove 231 and the second cutting groove 232 penetrate the circumferential surface of the support structure 2 along a vertical radial direction. In conjunction with the above embodiment, the first cutting groove 231 penetrates the circumferential surface of the support structure 2 from both sides in one radial direction, and the second cutting groove 232 penetrates the circumferential surface of the support structure 2 from both sides in another radial direction. One radial direction and the other radial direction are perpendicular to each other to form a cross shape, thus the first cutting groove 231 and the second cutting groove 232 form a cross-shaped cutting groove when viewed from a projection plane perpendicular to the axial direction.

[0052] Example 2

[0053] like Figure 7 and Figure 8 As shown, the support structure 2 is further disposed on the upper surface of the base 1, that is, the second support column 22 is connected to the upper surface of the base 1, and the first support column 21 is connected to the end of the second support column 22 away from the base 1; the upper surface of the base 1 is also provided with a rotation limiting part 11, which protrudes from the upper surface of the base 1; the rotation limiting part 11 is spaced apart from the support structure 2, and a locking groove 112 is formed between the rotation limiting part and the support structure. The locking groove 112 is used to lock the radial flange of the needle holder, thereby limiting the rotation of the needle holder 2000 and further reducing the movement of the needle holder 2000 during the cutting process.

[0054] like Figure 7 and Figure 8 As shown, the rotation limiting part 11 is further provided with a clearance opening 111. The clearance opening 111 extends through the upper surface of the rotation limiting part 11 along the axial direction of the support structure 2. The extension direction of the clearance opening 111 is located in the same radial plane as the cutting channel 23 to avoid the cutting device 200. That is to say, the clearance opening 111 extends downward from the top of the rotation limiting part 11, and on the projection plane perpendicular to the axis, the cutting channel 23 and the clearance opening 111 are on the same straight line. This can reduce the interference between the base 1 and the cutting device 200.

[0055] In one optional specific example, the rotation limit part 11 is provided at the edge of the base 1 and forms an annular structure. A first clearance opening 111 and a second clearance opening 111 are provided on the annular sidewall. The first clearance opening 111 and the first cutting groove 231 are located in the same radial plane, and the second clearance opening 111 and the second cutting groove 232 are located in the same radial plane.

[0056] like Figure 7 and Figure 8 As shown, in another optional specific example, the rotation limiting part 11 includes two parts, which are symmetrically arranged on both sides of the axis of the support structure 2. Both rotation limiting parts 11 are provided with a clearance opening 111, and the clearance opening 111 and the first cutting groove 231 are located in the same radial plane.

[0057] like Figure 7 and Figure 8 As shown, in another optional specific example, the rotation limiting part 11 includes two parts, which are symmetrically arranged on both sides of the axis of the support structure 2. Both rotation limiting parts are provided with a clearance opening 111, and the clearance opening 111 and the second cutting groove 232 are located in the same radial plane.

[0058] Example 3

[0059] like Figure 5 As shown, the axial extension dimension of the first support post 21 is further configured to be larger than the axial extension dimension of the needle holder threaded opening 2002. In conjunction with the above embodiment, the cutting channel 23 extends axially at least from the free end of the first support post 21 to the connection end between the first support post 21 and the second support post 22. That is, the cutting channel 23 extends axially from the free end of the first support post 21. This also means that the cutting device 200 can enter the cutting channel 23 from the free end of the first support post 21 and move towards the base 1, thereby completely cutting the threaded opening to form a complete cutting surface, which can improve the flatness of the cutting surface.

[0060] like Figure 6 As shown, the base 1 is further constructed as a cylindrical structure coaxially arranged with the support structure 2.

[0061] Example 4

[0062] like Figure 9 As shown, a second aspect embodiment of the present invention provides a cutting device 1000, which includes a cutting device 200 and a fixing device according to a first aspect embodiment of the present invention; the cutting device 200 is used to move axially in the cutting channel 23 of the needle holder fixing device 100.

[0063] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages:

[0064] (1) When the cutting device 200 cuts the threaded opening of the needle holder 2000, the needle holder 2000 is coaxially fixed on the outer periphery of the support structure 2. The support structure 2 supports the needle holder 2000 from the inside, which can reduce the deformation and movement of the needle holder 2000 during the cutting process, improve the flatness of the cutting, and thus help improve the accuracy of measurement.

[0065] (2) When the needle holder 2000 is coaxially fixed on the outer periphery of the support structure 2, since the cutting channel 23 radially penetrates the circumferential surface of the support structure 2, the axis of the support structure 2 is located in the cutting channel 23, that is, the axis of the needle holder 2000 is also located in the cutting channel 23. As a result, during the process of the cutting device 200 cutting the needle holder 2000 along the cutting channel 23, the cutting channel 23 can guide the cutting device 200 to cut through the axis of the needle holder 2000, and assist in aligning the cutting surface through the axis of the needle holder 2000, which is beneficial to improving the cutting efficiency and detection efficiency.

[0066] like Figure 9 As shown, the cutting device 200 is further configured as a blade structure, and the thickness of the blade is less than the width of the cutting channel 23. There is a reserved gap between the blade and the cutting channel, which avoids rigid contact and allows the blade to slide flexibly along the axial direction.

[0067] In a specific example, the blade thickness is 0.5mm, and the width of the cutting channel 23 can be 0.6mm, that is, the width of the first cutting groove 231 is 0.6mm, and the width of the second cutting groove 232 is 0.6mm.

[0068] Other configurations and operations of the cutting device 1000 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The up-down direction, left-right direction, and front-back direction are defined as shown in the figures.

[0069] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Moreover, "above," "over," and "on top" of the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A needle holder fixing device, characterized in that, include: Base (1); The support structure (2) includes a first support column (21) and a second support column (22) arranged coaxially. The first support column (21) is connected to the base (1) through the second support column (22). The outer diameter of the first support column (21) is configured to match the inner diameter of the threaded opening of the needle holder to allow the threaded opening to be fitted on the outer periphery of the first support column (21). The outer diameter of the second support column (22) is configured to match the inner diameter of the inner cavity of the needle holder to form a clearance fit or an interference fit. The support structure (2) is provided with a cutting channel (23), which extends at least axially from the free end of the first support column (21) to the connection end of the first support column (21) and the second support column (22), and penetrates the circumferential surface of the support structure (2) radially. The width of the cutting channel (23) is greater than the thickness of the cutting device (200) to guide the cutting device (200) to move axially.

2. The needle holder securement device of claim 1, wherein, The cutting channel (23) extends along the axial direction to the base (1).

3. The needle holder fixation device of claim 1 or 2, wherein, The cutting channel (23) includes a first cutting groove (231) and a second cutting groove (232) that penetrate the circumferential surface of the support structure (2) in different radial directions.

4. The needle holder securement device of claim 3, wherein, The first cutting groove (231) and the second cutting groove (232) penetrate the circumferential surface of the support structure (2) in a vertical radial direction.

5. The needle holder securement device of claim 1, wherein The support structure (2) protrudes from the upper surface of the base (1); The upper surface of the base (1) is also provided with a limited rotation part (11), which is spaced apart from the support structure (2) to form a locking groove (112) for locking the radial flange of the needle holder.

6. The needle holder securement device of claim 5, wherein, The rotation limiting part (11) is provided with an avoidance opening (111), which extends through the upper surface of the rotation limiting part along the axial direction of the support structure (2). The extension direction of the avoidance opening (111) is located in the same radial plane as the cutting channel (23) to avoid the cutting device (200).

7. The needle holder securement device of claim 1, wherein The axial extension dimension of the first support post (21) is configured to be greater than the axial extension dimension of the needle holder thread.

8. The needle holder fixing device according to claim 1, characterized in that, The base (1) is constructed as a cylindrical structure coaxial with the support structure (2).

9. A cutting apparatus, characterized by include: The needle holder fixing device according to any one of claims 1-8; A cutting device (200) is used to move axially in the cutting channel (23) of the needle holder fixing device.

10. The dissecting device of claim 9, wherein, The cutting device (200) is constructed as a blade structure and the thickness of the blade is less than the width of the cutting channel (23).

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