Packaging structure for preventing acupuncture needle from moving around axis of sleeve

Abstract

The utility model discloses a packaging structure for preventing an acupuncture needle from moving around the axis of a sleeve, which comprises a hollow tube body for accommodating the acupuncture needle, and the hollow tube body is provided with an acupuncture needle insertion port; at least two acupuncture needles are arranged in the hollow tube body, and all the acupuncture needles are attached to one another and arranged in the same direction to form an acupuncture needle collection structure in a combined mode. One or more limiting points are arranged at the end, close to the acupuncture needle inserting opening, of the inner wall of the peripheral side of the hollow pipe body, and when the acupuncture needle gathering structure is located in the hollow pipe body, the limiting points are configured to position the acupuncture needle gathering structure. And the acupuncture needle accommodated in the hollow tube body is limited, so that the acupuncture needle does not rotate around the axis of the hollow tube body and does not slide to be separated from the hollow sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a packaging structure of preventing acupuncture needle around sleeve pipe axis movement. BACKGROUND

[0002] At present, there is a sleeve type packaging structure of acupuncture needle on the market, a plurality of acupuncture needles are loaded into a hollow plastic tube, and a concave pressing point is formed on the tube body by extrusion, the acupuncture needles in the tube body are limited by the concave pressing point, and the acupuncture needles are prevented from falling out of the tube body. Compared with the traditional one-needle-one-tube packaging structure, the multi-needle-one-tube packaging structure has the advantages of high packaging efficiency and saving packaging materials.

[0003] For example, the patent document with the application number CN202322343142.5 discloses a sleeve type limiting packaging structure of acupuncture needle, which makes the hollow tube body shrink inward at the opening position of one end to form a tapered limiting surface, and the tapered limiting surface is abutted on the handle of the acupuncture needle to limit the acupuncture needle, which can prevent the acupuncture needle from falling out of the tube body.

[0004] Although the technical scheme provided in the above patent document solves the problem of acupuncture needle falling out of the tube body, it still has limitations in specific use, as follows:

[0005] Most of the sleeves are hollow cylindrical structures, and the single acupuncture needle is also a cylindrical structure. When the acupuncture needle is in the sleeve, the sleeve will mostly provide radial force to fix the multiple acupuncture needles in the sleeve through the binding part, such as the tapered limiting surface in the above patent document. In this way, the acupuncture needle group can be fixed. The acupuncture needle group refers to the combination of the acupuncture needles when they are pinched together. After being fixed, the acupuncture needle group will not easily slide along the axis and come out of the sleeve. Only the operator can manually exert force to pull out the acupuncture needle group. However, this way limits the axial movement of the acupuncture needle group, but cannot limit the rotation of the acupuncture needle group around the axis of the sleeve. Once affected by external force, that is, the exposed end of one or more acupuncture needles in the acupuncture needle group is scratched, a deflection force will be generated in the acupuncture needle group. At this time, the acupuncture needle group is easy to rotate around the axis of the sleeve, so that the acupuncture needle group comes out of the sleeve or moves relative to the binding part and rubs the binding part, resulting in the phenomenon of the acupuncture needle sliding out of the sleeve.

[0006] Therefore, how to solve the above-mentioned problems of the prior art has become the subject to be studied and solved by the utility model. UTILITY MODEL CONTENT

[0007] The utility model provides a packaging structure of preventing acupuncture needle around sleeve pipe axis movement, which aims at solving the technical problems in the above background technology.

[0008] To achieve the above object, the utility model adopts the technical scheme of a kind of packaging structure for preventing acupuncture needle from moving around sleeve pipe axis, comprising hollow pipe body for containing acupuncture needle, the hollow pipe body has acupuncture needle insertion port;

[0009] At least two acupuncture needles are arranged in the hollow pipe body, and all the acupuncture needles are arranged in the same direction to form an acupuncture needle set structure;

[0010] The inner wall of the circumferential side of the hollow pipe body has one or more limit points at one end close to the acupuncture needle insertion port, and the limit points are configured to position the acupuncture needle set structure when the acupuncture needle set structure is in the hollow pipe body.

[0011] The circumferential side of the hollow pipe body is also provided with a plurality of abutting limiting parts, and all the abutting limiting parts are uniformly distributed around the axis of the hollow pipe body, and the abutting limiting parts extend into the hollow pipe body, and the abutting limiting parts have an abutting surface abutting the circumferential side of the acupuncture needle, and when the acupuncture needle set structure is in the hollow pipe body, the circumferential side of each acupuncture needle corresponds to the abutting surface of each abutting limiting part.

[0012] In the above scheme, the relevant content is explained as follows:

[0013] In the above scheme, two or more acupuncture needles can be provided, and one, two or more limit points can also be provided.

[0014] In the above scheme, the acupuncture needle set structure is a plurality of acupuncture needles that are attached one by one like chopsticks.

[0015] In the above scheme, the abutting limiting part is generally in block structure, and the abutting surface is arranged on the surface of the abutting limiting part, so that the abutting limiting part can be more fully attached to the circumferential side of the acupuncture needle. If the abutting surface is arranged at the end of the abutting limiting part, the contact area is small, and it is difficult to solve the problem that the acupuncture needle group is easy to rotate around the sleeve pipe axis as pointed out in the background art.

[0016] In the above scheme, the abutting limiting part and the limit point can be matched to limit the acupuncture needle contained in the hollow pipe body, so that the acupuncture needle neither rotates around the axis of the hollow pipe body nor slides out of the hollow sleeve pipe.

[0017] Specifically, the plurality of acupuncture needles are attached to each other to form an acupuncture needle assembly structure, and then the acupuncture needle assembly structure is placed into the hollow tube. At this time, the limiting points press the side wall of the acupuncture needle assembly structure, so that the acupuncture needle assembly structure cannot slide axially in the hollow tube at will, and the circumferential side of each acupuncture needle corresponds to the abutting surface on each abutting limiting part to prevent the acupuncture needle assembly structure from rotating around the axis of the hollow tube.

[0018] Further technical solutions,

[0019] With the hollow tube as the reference, the inside of the hollow tube is the inner side, and the outside is the outer side.

[0020] Each abutting limiting part includes one or two protruding blocks extending from the outer circumferential surface of the hollow tube towards the inner side.

[0021] The side surface of the protruding block facing the inner side of the hollow tube is the abutting surface. When the protruding block is provided as one, the protruding block is between adjacent acupuncture needles.

[0022] When the protruding block in the abutting limiting part is provided as two, the two protruding blocks are symmetrically and distantly arranged.

[0023] The protruding block can be a strip structure, a point structure, or a structure with a trapezoidal cross section.

[0024] When the protruding block is provided as one, the protruding block is between adjacent acupuncture needles, which is to limit the adjacent acupuncture needles.

[0025] When the protruding block is provided as two, the two protruding blocks are symmetrically and distantly arranged, which is to make each acupuncture needle be clamped between the two protruding blocks.

[0026] Further technical solutions, the acupuncture needle includes a needle tail part, a needle handle, and a needle tip part arranged in sequence along the direction of insertion into the patient's body, the width of the needle tail part is greater than the diameter of the needle handle, and the needle tip part of each acupuncture needle is inserted into the hollow tube through the acupuncture needle insertion port to achieve positioning; the needle tail part of each acupuncture needle is exposed outside the acupuncture needle insertion port.

[0027] With the above design, when the acupuncture needle is removed, only the needle tail part of the acupuncture needle needs to be pulled out.

[0028] The needle tail part, the needle handle, and the needle tip part are arranged in sequence from back to front along the direction of insertion into the patient's body.

[0029] Further technical solutions,

[0030] When the two protruding blocks in the abutting limiting part are arranged, the cross section of the protruding blocks is arc-shaped or strip-shaped; the abutting surface is the arc-shaped concave surface or the strip-shaped surface of the protruding blocks, and the distance between the two protruding blocks in the abutting limiting part is less than or equal to the diameter of the needle handle.

[0031] With the above design, when the needle handle is clamped between the two protruding blocks, the cooperation between the needle handle and the two protruding blocks is interference fit or overfit, but gap fit is not recommended, and once gap fit occurs, the acupuncture needle is prone to shaking.

[0032] Further technical solutions,

[0033] When the cross section of the protruding block is arc-shaped, the two protruding blocks combine to form a semicircular structure, and the diameter of the semicircular structure is less than or equal to the diameter of the needle handle.

[0034] When the acupuncture needle is less contained, the strip-shaped surface is prone to slipping, in order to solve this problem, the semicircular structure is used for limiting, so that the acupuncture needle is at least wrapped by one half, and the risk of slipping is reduced.

[0035] Further technical solutions,

[0036] The hollow pipe body has a process groove corresponding to the protruding block, and the process groove matches the shape of the protruding block; the outer end of the protruding block is positioned and connected at the end of the process groove, and the inner end of the protruding block extends into the hollow pipe body.

[0037] With the above design, the protruding block can be quickly formed, and the manufacturing method is to extrude the hollow pipe body by means of a clamp (the clamp or the hollow pipe body can be heated), when the protruding block extends into the hollow pipe body, the process groove matching the shape of the protruding block is formed on the side of the hollow pipe body.

[0038] Further technical solutions,

[0039] When the plurality of limiting points are arranged, the plurality of limiting points are arranged uniformly around the axis of the hollow pipe body; each limiting point is configured to abut against the needle handle of each acupuncture needle.

[0040] With the above design, each acupuncture needle is abutted by a limiting point, and compared with a single limiting point, the stability is better.

[0041] As for "first", "second", etc. used herein, it does not mean to specially indicate the order or sequence, nor to limit the case, but only to distinguish the components or operations described by the same technical terms.

[0042] As used herein, the terms "connected," "coupled," or "positioned" are used broadly and encompass both direct and indirect electrical or physical connections, operations, or positioning.

[0043] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," and the like are open-ended terms that are intended to be synonymous, and are generally used to permit for the inclusion of additional components, features, or steps without specifically reciting those additional components, features, or steps.

[0044] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," and the like are open-ended terms that are intended to be synonymous, and are generally used to permit for the inclusion of additional components, features, or steps without specifically reciting those additional components, features, or steps.

[0045] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," and the like are open-ended terms that are intended to be synonymous, and are generally used to permit for the inclusion of additional components, features, or steps without specifically reciting those additional components, features, or steps.

[0046] The working principle and advantages of the utility model are as follows:

[0047] In the utility model, the acupuncture needle accommodated in the hollow pipe body is limited through the cooperation of the abutting limiting portion and the limiting point, so that the acupuncture needle cannot rotate around the axis of the hollow pipe body or slide out of the hollow sleeve.

[0048] Specifically, the plurality of acupuncture needles are mutually attached to form an acupuncture needle assembly structure, and then the acupuncture needle assembly structure is placed into the hollow pipe body, at this time, the limiting point extrudes the side wall of the acupuncture needle assembly structure, so that the acupuncture needle assembly structure cannot axially slide in the hollow pipe body, and the circumferential side of each acupuncture needle corresponds to the abutting surface on each abutting limiting portion one by one to prevent the acupuncture needle assembly structure from rotating around the axis of the hollow pipe body in the hollow pipe body. BRIEF DESCRIPTION OF DRAWINGS

[0049] ATTACHMENT Figure 1 It is a structure schematic view when the hollow pipe body in the embodiment of the utility model is not provided with the abutting limiting portion;

[0050] ATTACHMENT Figure 2 It is a structure schematic view when the hollow pipe body in the embodiment of the utility model is not provided with the abutting limiting portion and is inserted with the acupuncture needle;

[0051] ATTACHMENT Figure 3 It is a schematic view of fixing the acupuncture needle when the hollow pipe body structure in the embodiment of the utility model is not provided with the abutting limiting portion;

[0052] ATTACHMENT Figure 4A longitudinal sectional view of the hollow pipe body structure without the abutting limiting part in the embodiment of the present utility model;

[0053] The abutting limiting part is provided with an abutting surface 5. Figure 5 The abutting limiting part is provided with an abutting surface 5. Figure 4 A local enlarged view of the middle A;

[0054] The abutting limiting part is provided with an abutting surface 5. Figure 6 A limiting point structure schematic view in the embodiment of the present utility model;

[0055] The abutting limiting part is provided with an abutting surface 5. Figure 7 A structure schematic view of the hollow pipe body provided with the abutting limiting part in the embodiment of the present utility model;

[0056] The abutting limiting part is provided with an abutting surface 5. Figure 8 An embodiment schematic view of the abutting limiting part being two in the present utility model;

[0057] The abutting limiting part is provided with an abutting surface 5. Figure 9 Another embodiment schematic view of the abutting limiting part being two in the present utility model;

[0058] The abutting limiting part is provided with an abutting surface 5. Figure 10 An embodiment schematic view of the abutting limiting part being one in the present utility model.

[0059] In the above drawings: 1, hollow pipe body; 2, acupuncture needle insertion port; 3, limiting point; 4, abutting limiting part; 5, abutting surface; 6, insertion block; 7, needle tail part; 8, needle handle; 9, needle tip part; 10, process groove. DETAILED DESCRIPTION

[0060] The present utility model will be further described below in combination with the drawings and embodiments:

[0061] Embodiment: the present case will be clearly explained by the drawings and detailed description, and any person skilled in the art can change and modify the technology taught by the present case after understanding the embodiments of the present case, which does not deviate from the spirit and scope of the present case.

[0062] The terms in this paper are only for describing specific embodiments and are not intended to limit the present case. The singular form such as "a", "this", "this", "this" and "the" as used herein also includes the plural form.

[0063] Referring to the drawings, Figures 1-10 A packaging structure for preventing acupuncture needles from moving around the sleeve axis, comprising a hollow pipe body 1 for accommodating acupuncture needles, the hollow pipe body 1 having an acupuncture needle insertion port 2;

[0064] At least two said acupuncture needles are arranged in the hollow pipe body 1, and all said acupuncture needles are arranged in the same direction to form an acupuncture needle assembly structure.

[0065] The circumferential inner wall of the hollow tube body 1 has one or more limiting points 3 near the acupuncture needle insertion port 2, and the limiting points 3 are configured to position the acupuncture needle assembly structure when the acupuncture needle assembly structure is in the hollow tube body 1.

[0066] The circumferential side of the hollow tube body 1 is also provided with a plurality of abutting limiting portions 4, all of which are uniformly distributed around the axis of the hollow tube body 1, and the abutting limiting portions 4 are arranged to extend towards the inside of the hollow tube body 1, and the abutting limiting portions 4 have an abutting surface 5 abutting the circumferential side of the acupuncture needle; when the acupuncture needle assembly structure is in the hollow tube body 1, the circumferential side of each acupuncture needle is one-to-one corresponding to the abutting surface 5 on each abutting limiting portion 4.

[0067] In this embodiment, two or more acupuncture needles can be provided, and the limiting points 3 can also be provided with one, two or more.

[0068] In this embodiment, the acupuncture needle assembly structure is a plurality of acupuncture needles that are one-to-one corresponding and fit together like chopsticks.

[0069] In this embodiment, the abutting limiting portion 4 is generally block-shaped, and the abutting surface 5 is arranged on the surface of the abutting limiting portion 4, so that the abutting limiting portion 4 can be more fully fitted with the circumferential side of the acupuncture needle. If the abutting surface 5 is arranged at the end of the abutting limiting portion 4, the contact area is small, and it is difficult to solve the problem that the acupuncture needle group is easy to rotate around the sleeve axis as pointed out in the background art.

[0070] In the utility model, the cooperation of the abutting limiting portion 4 and the limiting point 3 can limit the acupuncture needle contained in the hollow tube body 1, so that the acupuncture needle cannot rotate around the axis of the hollow tube body 1 or slide out of the hollow sleeve.

[0071] Specifically, a plurality of acupuncture needles are mutually fitted to form an acupuncture needle assembly structure, and then the acupuncture needle assembly structure is placed into the hollow tube body 1. At this time, the limiting point 3 will extrude the side wall of the acupuncture needle assembly structure, so that the acupuncture needle assembly structure cannot slide axially in the hollow tube body 1, and the circumferential side of each acupuncture needle is one-to-one corresponding to the abutting surface 5 on each abutting limiting portion 4, so that the acupuncture needle assembly structure cannot rotate around the axis of the hollow tube body 1 in the hollow tube body 1.

[0072] Preferably, the hollow tube body 1 is taken as a reference, the inside of the hollow tube body 1 is the inside, and the outside is the outside.

[0073] Each of the abutting limiting portions 4 includes one or two protruding blocks 6 extending from the outer circumferential surface of the hollow tube body 1 towards the inside;

[0074] The side surface of the extending block 6 facing the inside of the hollow tube body 1 is an abutting surface 5; when the extending block 6 is provided as one, the extending block 6 is between adjacent acupuncture needles.

[0075] When the extending block 6 in the abutting limiting part 4 is provided as two, the two extending blocks 6 are symmetrically and distantly arranged.

[0076] The extending block 6 can be a strip structure, a point structure or a structure with a trapezoidal cross section.

[0077] When the extending block 6 is provided as one, the extending block 6 is between adjacent acupuncture needles, so that there is an extending block 6 between adjacent acupuncture needles.

[0078] When the extending block 6 is provided as two, the two extending blocks 6 are symmetrically and distantly arranged, so that each acupuncture needle is clamped between the two extending blocks 6.

[0079] Preferably, the acupuncture needle comprises, in sequence along the direction of insertion into the patient's body, a needle tail part 7, a needle handle part 8 and a needle tip part 9, the width of the needle tail part 7 is greater than the diameter of the needle handle part 8, and the needle tip part 9 of each acupuncture needle is inserted into the hollow tube body 1 through the acupuncture needle insertion port 2 to achieve positioning; the needle tail part 7 of each acupuncture needle is exposed outside the acupuncture needle insertion port 2.

[0080] With the above design, when the acupuncture needle is taken out, only the needle tail part 7 of the acupuncture needle needs to be pulled out.

[0081] The needle tail part 7, the needle handle part 8 and the needle tip part 9 are sequentially arranged from back to front along the direction of insertion into the patient's body.

[0082] Preferably, when the extending block 6 in the abutting limiting part 4 is provided as two, the cross section of the extending block 6 is arc-shaped or strip-shaped; the abutting surface 5 is an arc-shaped concave surface or a strip-shaped surface of the extending block 6, and the distance between the two extending blocks 6 in the abutting limiting part 4 is less than or equal to the diameter of the needle handle part 8.

[0083] With the above design, when the needle handle part 8 is clamped between the two extending blocks 6, the cooperation between the needle handle part 8 and the two extending blocks 6 is interference fit or overfit, but gap fit is not recommended, and once gap fit occurs, the acupuncture needle is prone to shaking.

[0084] Preferably, when the cross section of the extending block 6 is arc-shaped, the two extending blocks 6 combine to form a semicircular structure, and the diameter of the semicircular structure is less than or equal to the diameter of the needle handle part 8.

[0085] When the acupuncture needles are less contained, the strip-shaped surface is prone to slipping, in order to solve this problem, the semi-circular structure is used for limiting, so that the acupuncture needle is wrapped by at least one half, and the risk of slipping is reduced.

[0086] Preferably, the hollow pipe body 1 is provided with a process groove 10 corresponding to the extension block 6, and the process groove 10 matches the shape of the extension block 6; the outer end of the extension block 6 is positioned and connected at the end of the process groove 10, and the inner end of the extension block 6 extends into the hollow pipe body 1.

[0087] By the above design, the extension block 6 can be quickly formed, and the manufacturing method is that the hollow pipe body 1 is extruded by a clamp (the clamp or the hollow pipe body 1 can be heated), and when the extension block 6 extends into the hollow pipe body 1, the process groove 10 matching the shape of the extension block 6 is formed on the side of the hollow pipe body 1.

[0088] Preferably, when the plurality of limiting points 3 are provided, the plurality of limiting points 3 are uniformly arranged around the axis of the hollow pipe body 1; each limiting point 3 is configured to abut against the handle 8 of each acupuncture needle.

[0089] By the above design, each acupuncture needle is abutted by a limiting point 3, and compared with a single limiting point 3, the stability is better.

[0090] Working principle:

[0091] The following is an example of a half-circular structure distance formed by two extension blocks 6.

[0092] The plurality of acupuncture needles are adhered to each other to form an acupuncture needle set structure, and then the acupuncture needle set structure is placed into the hollow pipe body 1, at this time, the limiting point 3 extrudes the side wall of the acupuncture needle set structure, so that the acupuncture needle set structure cannot slide axially in the hollow pipe body 1, and when the acupuncture needle is clamped in the hollow pipe body 1, each handle 8 is clamped into a corresponding half-circular structure, that is, the half-circular structure is used for limiting, so that each acupuncture needle is wrapped by at least one half. After that, the acupuncture needle set structure cannot rotate around the axis of the hollow pipe body 1 in the hollow pipe body 1.

[0093] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A packaging structure for preventing acupuncture needles from moving around the axis of a sleeve, characterized in that: Includes a hollow tube (1) for accommodating acupuncture needles, the hollow tube (1) having an acupuncture needle insertion port (2); The hollow tube (1) contains at least two acupuncture needles, and all the acupuncture needles are attached to each other and arranged in the same direction to form an acupuncture needle assembly structure. The inner wall of the hollow tube (1) has one or more limiting points (3) at one end near the acupuncture needle insertion port (2). When the acupuncture needle assembly structure is inside the hollow tube (1), the limiting points (3) are configured to position the acupuncture needle assembly structure. The hollow tube (1) is provided with a plurality of abutment limiting parts (4) on its periphery. All abutment limiting parts (4) are evenly distributed around the axis of the hollow tube (1). The abutment limiting parts (4) extend into the hollow tube (1). The abutment limiting parts (4) have abutment surfaces (5) that abut against the periphery of the acupuncture needle. When the acupuncture needle assembly structure is inside the hollow tube (1), the periphery of each acupuncture needle abuts against the abutment surfaces (5) of each abutment limiting part (4) respectively.

2. The packaging structure for preventing acupuncture needles from moving around the axis of the sleeve according to claim 1, characterized in that: Based on the hollow tube (1), the inside of the hollow tube (1) is the inner side, and the outside is the outer side; Each of the aforementioned abutting and limiting parts (4) includes one or two extension blocks (6) extending from the outer periphery of the hollow tube (1) toward the inner side; The side surface of the insert (6) facing the inside of the hollow tube (1) is the contact surface (5); when the insert (6) is set as one, each insert (6) is located between adjacent acupuncture needles; When the inserting block (6) in the abutting limiting part (4) is set to two, the two inserting blocks (6) are symmetrical and spaced apart.

3. The packaging structure for preventing acupuncture needles from moving around the axis of the sleeve according to claim 1, characterized in that: The acupuncture needle includes a needle tail (7), a needle handle (8), and a needle tip (9) arranged sequentially along the direction of insertion into the patient's body. The width of the needle tail (7) is greater than the diameter of the needle handle (8). The needle tip (9) of each acupuncture needle is inserted into the hollow tube (1) through the acupuncture needle insertion port (2) to achieve positioning. The needle tail (7) of each acupuncture needle protrudes from the acupuncture needle insertion port (2).

4. The packaging structure for preventing acupuncture needles from moving around the axis of the sleeve according to claim 3, characterized in that: When there are two insert blocks (6) in the abutting and limiting part (4), the cross-section of the insert block (6) is arc-shaped or strip-shaped; the abutting surface (5) is the arc-shaped concave surface or strip-shaped surface of the insert block (6), and the distance between the two insert blocks (6) in the abutting and limiting part (4) is less than or equal to the diameter of the needle handle (8).

5. The packaging structure for preventing acupuncture needles from moving around the axis of the sleeve according to claim 4, characterized in that: When the cross-section of the insert (6) is arc-shaped, the two inserts (6) combine to form a semi-circular structure, the diameter of which is less than or equal to the diameter of the needle handle (8).

6. The packaging structure for preventing acupuncture needles from moving around the axis of the sleeve according to claim 3, characterized in that: When multiple limiting points (3) are provided, the multiple limiting points (3) are evenly distributed around the axis of the hollow tube (1); each limiting point (3) is configured to abut against the handle (8) of each acupuncture needle.

7. The packaging structure for preventing acupuncture needles from moving around the axis of the sleeve according to claim 2, characterized in that: The hollow tube (1) has a process groove (10) corresponding to the extension block (6), the process groove (10) and the extension block (6) are matched in shape; the outer end of the extension block (6) is positioned and connected to the end of the process groove (10), and the inner end of the extension block (6) extends into the hollow tube (1).

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