A tendon structure cooperating with a protective sleeve

Abstract

The utility model discloses a kind of shaft muscle structure cooperating with protective sleeve, it includes;Shaft body, the outer circumferential surface of shaft body constitutes the mounting surface for installing external protective sleeve, mounting surface has the taper of facilitating external protective sleeve to be equipped, so that the shaft body is circular truncated cone structure;Two convex ribs, it is fixed on the outer circumferential surface of shaft body with interval, each the convex rib of described is in the one straight generatrix of shaft body mounting surface, the circumferential angle of two convex ribs relative to shaft body axis is 40 °~100 °.Convex rib's arc section makes it realize linear contact with the inner wall of protective sleeve, not large area surface contact, reduce the fit contact area, overcome the difficult problem that the separation force of large size instrument is too large due to fit surface is big, size interference, so that the installation and removal of longer protective sleeve are more labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a rib structure that cooperates with a protective sleeve. Background Technology

[0002] Currently, many polymer medical devices require protective measures for specific areas before use, and adding protective sleeves is a common method. The most typical fit between the protective sleeve and the device is a cylindrical fit. For smaller products, due to the small mating area and high dimensional stability, it is easy to control the assembly performance of the device and the protective sleeve (such as the force required to install and remove the protective sleeve), preventing accidental detachment before use and ensuring easy disassembly during use. However, for larger products, the cylindrical mating area increases significantly, making it difficult to reliably control the fit performance between the device and the protective sleeve.

[0003] Common ways to match control devices with protective sleeves include: (1) Replace the protective sleeve material with a flexible material with lower hardness, but such materials are prone to deformation or bending, and have poor protective effect on the instrument; (2) Provide annular raised ribs or three or more evenly distributed vertical ribs on the mating surfaces of the protective sleeve and / or the instrument. This method is more effective for smaller instruments, but performs poorly on larger instruments. It often results in the protective sleeve and the instrument fitting too tightly, which is not conducive to assembly and disassembly, or the fit is too loose, which causes the protective sleeve to fall off prematurely.

[0004] In addition, some instruments have long operating parts, requiring correspondingly longer protective sleeves. Longer soft protective sleeves are prone to significant deformation, so softer materials cannot be used, making rigid and semi-rigid materials the common choices.

[0005] To address the aforementioned problems in the existing technology, we have made technical improvements to the existing fit structure between the protective sleeve and the shaft to meet usage requirements. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a shaft rib structure with a reasonable structural design that is suitable for the fit between the protective sleeve and the shaft in polymer medical devices in the medical field.

[0007] The technical problem to be solved by this utility model is achieved through the following technical solution: a rib structure that cooperates with a protective sleeve, comprising; The shaft body has an outer peripheral surface that forms a mounting surface for installing an external protective sleeve. The mounting surface has a taper that facilitates the installation of the external protective sleeve, giving the shaft body a frustum-shaped structure. Two convex ribs are fixed at intervals on the outer circumferential surface of the shaft. Each convex rib is on one of the straight generatrices of the shaft mounting surface. The circumferential angle between the two convex ribs and the shaft axis is 40°~100°.

[0008] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the rib structure that cooperates with the protective sleeve described above, wherein the thickness of the rib is 0.1mm~0.5mm.

[0009] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the rib structure that cooperates with the protective sleeve described above has rounded corners on the outer wall of the rib, so that the longitudinal section edge of the rib is set in an arc shape.

[0010] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the rib structure that cooperates with the protective sleeve described above, wherein the width of the rib is not greater than 1.5mm.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are: (1) By setting two convex ribs on the surface of the shaft, an asymmetrical linear contact is formed with the inner wall of the outer protective sleeve, so that the protective sleeve is in a non-uniform stress state. This structure can provide sufficient friction to prevent the protective sleeve from falling off naturally during storage and transportation, and avoid the problem of excessive disassembly force caused by tight fit, thus balancing the contradictory requirements of "preventing falling off" and "easy to install and disassemble".

[0012] (2) The arc-shaped cross section of the rib enables it to make linear contact with the inner wall of the protective sleeve, rather than large-area surface contact, which reduces the contact area and overcomes the problem of excessive separation force caused by large-size instruments due to large contact area and interference size, making the installation and removal of longer protective sleeves easier.

[0013] (3) This structure does not rely on the soft deformation of the protective sleeve material to achieve assembly, thus allowing the protective sleeve to be made of semi-rigid or rigid materials. This effectively solves the defects of long soft protective sleeves being easy to bend and deform, significantly enhances the rigidity and reliability of protection for key parts of the instrument, and extends the service life of the protective sleeve. Moreover, the structure is simple and easy to process and manufacture. The entire improvement scheme only involves the optimization of the shaft structure, which can be achieved by setting a specific slope and two convex ribs. It has good compatibility with existing processing technology, does not require a complicated manufacturing process, and is conducive to controlling production costs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a full sectional view of the protective sleeve used in conjunction with this utility model.

[0015] Reference numerals: 1. Shaft; 2. Protective sleeve; 3. Rib. Detailed Implementation

[0016] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0017] Example 1, referring to Figure 1-2 A rib structure that mates with a protective sleeve, comprising: Shaft 1, the outer peripheral surface of shaft 1 forms a mounting surface for mounting the outer protective sleeve 2. The mounting surface is a circumferential surface and has a taper to facilitate the fitting of the outer protective sleeve 2. The size of the taper can be selected according to the usage requirements, so that the shaft 1 has a frustum-shaped structure. Two ribs 3 are fixed at intervals on the outer circumferential surface of the shaft 1. Each rib 3 is on one of the straight generatrices of the mounting surface of the shaft 1. The circumferential angle between the two ribs 3 and the axis of the shaft 1 is 40°~100°. The specific angle can be selected according to the usage requirements. The thickness of the protruding rib 3 is 0.1mm~0.5mm, and its specific thickness can be selected according to the usage requirements; The outer wall of the rib 3 has rounded corners, so that the longitudinal section edge of the rib 3 is set in an arc shape; The width of the protruding rib 3 is no more than 1.5mm, and its specific value can be selected according to the usage requirements. The shaft 1, the rib 3, and the matching protective sleeve 2 can be made of polymer materials, such as polyolefin materials.

[0018] Using the medical device in Example 1, such as the connecting part of the middle through tube of the shaft 1, when it is necessary to close the end of the shaft 1 with the protective sleeve 2, the protective sleeve 2 can be directly fitted onto the outer circumferential surface of one end of the shaft 1. Because the surface of the shaft 1 is provided with two convex ribs 3, it forms an asymmetrical linear contact with the inner wall of the outer protective sleeve 2, so that the protective sleeve 2 is in a non-uniform stress state. This structure can provide sufficient friction to prevent the protective sleeve 2 from falling off naturally during storage and transportation, and also avoids the problem of excessive disassembly force caused by excessive tightness.

Claims

1. A rib structure that mates with a protective sleeve, characterized in that: It includes; The shaft body has an outer peripheral surface that forms a mounting surface for installing an external protective sleeve. The mounting surface has a taper that facilitates the installation of the external protective sleeve, giving the shaft body a frustum-shaped structure. Two convex ribs are fixed at intervals on the outer circumferential surface of the shaft. Each convex rib is on one of the straight generatrices of the shaft mounting surface. The circumferential angle between the two convex ribs and the shaft axis is 40°~100°.

2. The axial rib structure that mates with the protective sleeve according to claim 1, characterized in that: The thickness of the rib is 0.1mm to 0.5mm.

3. The axial rib structure that mates with the protective sleeve according to claim 1, characterized in that: The outer wall of the rib has rounded corners, so that the longitudinal section edge of the rib is set in an arc shape.

4. The axial rib structure that mates with the protective sleeve according to claim 1, characterized in that: The width of the rib is no more than 1.5 mm.

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