Protective sleeve

Abstract

The application relates to a protective sleeve, comprising: a main body having a first cavity and a second cavity which are distributed side by side along a first direction, one end of the first cavity along the first direction being configured as an insertion port, and one end of the first cavity far away from the insertion port along the first direction being communicated with the second cavity; in the second direction, the height of the first cavity is greater than that of the second cavity; wherein under the condition that the optical module is in the first packaging form, the first end part of the optical module is inserted and limited in the first cavity; and under the condition that the optical module is in the second packaging form, the second end part of the optical module extends from the first cavity and is limited in the second cavity. According to the protection sleeve, the same protection sleeve can be suitable for the optical modules in at least two packaging forms, and the protection requirements of the golden fingers of the optical modules in different packaging forms can be well met.

Description

Technical Field

[0001] This application relates to the field of optical communication technology, and in particular to a protective sleeve. Background Technology

[0002] OSFP (Octal Small Form Factor Plugable) is an important packaging form for optical modules in the optical communication industry. OSFP is a product package with 0.6mm gold finger spacing, 60 pins, and 8 channels. It features heat dissipation fins or airflow channels on the top. The main mechanical dimensions of Type 1 are 100.4mm in length and 13mm in height, making its overall volume approximately twice that of QSFP-DD. This is an extremely user-friendly packaging for heat dissipation in 800G optical modules with compact cabling and high heat density, and it is widely used in interconnect applications for switches from major manufacturers. OSFP-RHS (Riding Heat Sink) is another application of OSFP packaging. It is compatible with OSFP in terms of electrical and management interfaces, host-side connectors, etc. The main difference lies in its Type 1 main mechanical dimensions: 100.4mm in length and 9.5mm in height. The front block differentiates it from OSFP to prevent physical damage caused by mixing the two.

[0003] The gold fingers of an optical module are the contact parts that connect to the host. Most optical modules use nickel-palladium-gold materials for their gold fingers. To prevent the gold fingers from being oxidized by long-term exposure to air or damaged during transportation, which would affect normal use, protective sleeves must be put on the gold fingers of each type of optical module before warehousing and before leaving the factory. Plastic protective sleeves must be designed and molded for each type of gold finger. The protective sleeves are not very practical and have high production costs. Utility Model Content

[0004] Therefore, it is necessary to provide a protective sleeve to address the problems of poor practicality and high production cost of existing protective sleeves for the gold fingers of optical modules.

[0005] A protective sleeve for protecting the gold fingers of an optical module, the protective sleeve comprising:

[0006] The main body has a first cavity and a second cavity arranged side by side along a first direction. One end of the first cavity along the first direction is configured as an insertion interface, and the end of the first cavity away from the insertion interface along the first direction is connected to the second cavity. The first direction is the depth direction of the protective sleeve. In a second direction, the height of the first cavity is greater than the height of the second cavity. The second direction is the height direction of the protective sleeve.

[0007] In the case where the optical module is in the first packaging form, the first end of the optical module is inserted into and confined within the first cavity;

[0008] When the optical module is in the second packaging form, the second end of the optical module extends into the first cavity and is confined within the second cavity.

[0009] The aforementioned protective sleeve, when the optical module is in the first packaging form, restricts the first end of the optical module to be located within the first cavity; when the optical module is in the second packaging form, restricts the second end of the optical module to be located within the second cavity. The same protective sleeve can be applied to optical modules in at least two packaging forms, which better meets the protection requirements of the gold fingers of optical modules in different packaging forms, improves the applicability of the protective sleeve, helps to reduce production costs, and helps to improve production efficiency.

[0010] In some embodiments, the height of the first cavity ranges from 12.35 mm to 12.45 mm; and / or the depth of the first cavity ranges from 21.98 mm to 22 mm.

[0011] In some embodiments, the height of the second cavity ranges from 9.05 mm to 9.15 mm; and / or the depth of the second cavity ranges from 14.98 mm to 15 mm.

[0012] In some embodiments, the body further has a guide portion configured as a guide chamfer located on the inner periphery of the insertion interface.

[0013] In some embodiments, the guide chamfer has an angle of 45° and a dimension of 0.5 mm in the first direction.

[0014] In some embodiments, the inner circumference of the first cavity is provided with a first rib, and the height of the first rib protruding from the inner circumference of the first cavity is 0.5 mm.

[0015] In some embodiments, the number of the first ribs is at least two, and each of the first ribs is spaced apart on the inner periphery of the first cavity; in the first direction, the size of each of the first ribs is equal to the depth of the first cavity.

[0016] In some embodiments, the inner circumference of the second cavity is provided with a second rib, and the height of the second rib protruding from the inner circumference of the second cavity is 0.5 mm.

[0017] In some embodiments, the number of the second ribs is at least two, and each of the second ribs is spaced apart on the inner periphery of the second cavity; in the first direction, the size of each of the second ribs is equal to the depth of the second cavity.

[0018] In some embodiments, the body is configured as a thermoplastic elastomer structure with elasticity and flame retardancy; the body has a Shore hardness of 65 Shore A to 75 Shore A, and / or the body has a volume resistivity of 10^6 Ω·cm to 10^9 Ω·cm, and / or the body has an electrostatic triboelectric voltage of less than 1000V, and / or the body has an electrostatic residual voltage of less than 20V. Attached Figure Description

[0019] Figure 1 This is an isometric view of the gold fingers and protective sleeve of the optical module in some embodiments of this application.

[0020] Figure 2 for Figure 1 The image shows a front view of the gold fingers and protective sleeve of the optical module.

[0021] Figure 3 This is a front view of the gold fingers and protective sleeve of the optical module in some other embodiments of this application.

[0022] Figure 4 This is an isometric view of the protective sleeve in some embodiments of this application.

[0023] Figure 5 for Figure 4 A partial cross-sectional view of the protective sleeve shown.

[0024] Figure 6 for Figure 4 The left view of the protective sleeve shown.

[0025] Figure label:

[0026] 10. Protective sleeve; 20. Optical module; 21. First end; 23. Second end; 100. Main body; 101. First cavity; 101a. First rib; 102. Second cavity; 102a. Second rib; 103. Socket; 104. Guide part. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "initial," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Please refer to Figures 1 to 3 In one embodiment, the protective sleeve 10 is used to protect the gold fingers of the optical module 20. The protective sleeve 10 includes a main body 100, which has a first cavity 101 and a second cavity 102 arranged side by side along a first direction. One end of the first cavity 101 along the first direction is configured as an interface 103, and the end of the first cavity 101 away from the interface 103 along the first direction is connected to the second cavity 102. The first direction is the depth direction of the protective sleeve 10. In a second direction, the height of the first cavity 101 is greater than the height of the second cavity 102. The second direction is the height direction of the protective sleeve 10.

[0034] Among them, reference Figure 3 When the optical module 20 is in the first package configuration, the first end 21 of the optical module 20 is inserted into and confined within the first cavity 101; Reference Figure 2 When the optical module 20 is in the second packaging form, the second end 23 of the optical module 20 extends into the first cavity 101 and is confined within the second cavity 102.

[0035] It should be noted that the first direction is Figure 2 and Figure 3 The X direction shown is the depth direction of the protective sleeve 10; the second direction is... Figure 2 and Figure 3 The Z direction shown is the height direction of the protective sleeve 10.

[0036] Here, the optical module 20 is an optoelectronic device that converts electrical signals into optical signals. The gold fingers of the optical module 20 are the contact parts on the circuit board of the optical module 20 used to connect with the host. The optical modules 20 with different packaging forms have different structures, and a protective sleeve 10 needs to be put on the gold fingers of each type of optical module 20.

[0037] For example, when the optical module 20 is in a first package form (i.e., OSFP package form), the optical module 20 has a first end 21, the gold fingers of the optical module 20 are located at the first end 21, and the step surface formed between the first cavity 101 and the second cavity 102 limits the first end 21 so that the first end 21 is limited within the first cavity 101; when the optical module 20 is in a second package form (i.e., OSFP-RHS package form), the gold fingers of the optical module 20 have a second end 23, the gold fingers of the optical module 20 are located at the second end 23, the second end 23 extends from the first cavity 101 into the second cavity 102, and the second end 23 is limited within the second cavity 102.

[0038] In the case of the optical module 20 being in the first packaging form, the first end 21 of the optical module 20 is confined within the first cavity 101; in the case of the optical module 20 being in the second packaging form, the second end 23 of the optical module 20 is confined within the second cavity 102. The same protective sleeve 10 can be applied to optical modules 20 in at least two packaging forms, which better meets the protection requirements of the gold fingers of optical modules 20 in different packaging forms, improves the applicability of the protective sleeve 10, helps to reduce production costs, and helps to improve production efficiency.

[0039] In the embodiments of this application, the main body 100 is a component used to provide a protective space for the gold fingers of the optical module 20, and the main body 100 can adopt various structural forms. For example, the main body 100 is an integral structure, and one end of the main body 100 has a plug-in interface 103 for plugging and cooperating with the optical module 20. The main body 100 can be a cuboid, cylindrical or other shape structure with one end open. The shape of the main body 100 is not limited here.

[0040] In the embodiments of this application, the height of the first cavity 101 is greater than the height of the second cavity 102, which is achieved by the following method: in the second direction, the bottom side of the first cavity 101 is flush with the bottom side of the second cavity 102, and the top side of the first cavity 101 is higher than the top side of the second cavity 102. In other embodiments, the height of the first cavity 101 is greater than the height of the second cavity 102, which can also be achieved by the following method: in the second direction, the top side of the first cavity 101 is flush with the top side of the second cavity 102, and the bottom side of the first cavity 101 is lower than the bottom side of the second cavity 102.

[0041] In the embodiments of this application, the opening area of ​​the connector 103 is 22.38mm × 12.4mm, that is, the connector 103 has an opening area of ​​22.38mm × 12.4mm. Figure 1 The height in the Z direction shown is 12.4 mm, and the insertion interface 103 is in Figure 1 The width in the Y direction shown is 22.38 mm.

[0042] For details, please refer to Figure 4 and Figure 5 The height of the first cavity 101 ranges from 12.35 mm to 12.45 mm; and / or the depth of the first cavity 101 ranges from 21.98 mm to 22 mm.

[0043] It should be noted that the height of the first cavity 101 is also... Figure 4 and Figure 5 The dimension shown in the Z direction, the depth of the first cavity 101 is also... Figure 1 The dimension in the X direction is shown.

[0044] The beneficial effect here is that by limiting the height and depth of the first cavity 101 to a preset range, the first cavity 101 can be better adapted to the optical module 20 without taking up too much space and resulting in more consumables.

[0045] In the embodiments of this application, the height of the first cavity 101 can be 12.35mm, 12.4mm or 12.45mm; the depth of the first cavity 101 can be 21.98mm, 21.99mm or 22mm.

[0046] For more specific details, please refer to Figure 4 and Figure 5 The height of the second cavity 102 ranges from 9.05 mm to 9.15 mm; and / or the depth of the second cavity 102 ranges from 14.98 mm to 15 mm.

[0047] It should be noted that the height of the second cavity 102 is also... Figure 4 and Figure 5 The dimension shown in the Z direction corresponds to the depth of the second cavity 102. Figure 4 and Figure 5 The dimension in the X direction is shown.

[0048] The beneficial effect here is that by limiting the height and depth of the second cavity 102 to a preset range, the second cavity 102 can be better adapted to the optical module 20 without taking up too much space and resulting in more consumables.

[0049] In the embodiments of this application, the height of the second cavity 102 can be 12.35mm, 12.4mm or 12.45mm; the depth of the second cavity 102 can be 21.98mm, 21.99mm or 22mm.

[0050] Please refer to Figure 4 and Figure 5 The main body 100 also has a guide portion 104, which is configured as a guide chamfer located on the inner periphery of the insertion interface 103.

[0051] It is understandable that the guide portion 104 is located on the inner periphery of the insertion interface 103, that is, the guide portion 104 is located at the corner of the insertion interface 103.

[0052] The beneficial effect here is that by setting a guide chamfer on the insertion interface 103, the optical module 20 can be quickly inserted into the cavity of the main body 100 under the guidance of the guide chamfer.

[0053] In the embodiments of this application, the connector 103 is rectangular, and its inner periphery has four corners, with a guide chamfer provided at each corner for better guidance. In other embodiments, the connector 103 may also be circular or other shapes, and the guide chamfer may be provided at other locations on the connector 103.

[0054] For a specific embodiment, please refer to Figure 4 and Figure 5 The guide chamfer angle is 45°, and the dimension of the guide chamfer in the first direction is 0.5mm.

[0055] It should be noted that the dimension of the guide chamfer in the first direction, that is, in Figure 4 and Figure 5 The dimension in the X direction is shown.

[0056] The beneficial effect here is that by limiting the angle of the guide chamfer and its size in the first direction, the guide chamfer can guide the insertion of the optical module 20, while the guide chamfer will not take up too much space.

[0057] In other embodiments, the angle of the guide chamfer can be other values, and the dimension of the guide chamfer in the first direction can be other values.

[0058] Please refer to Figure 5 and Figure 6 The first cavity 101 has a first rib 101a on its inner periphery, and the first rib 101a protrudes from the inner periphery of the first cavity 101 by a height of 0.5mm.

[0059] It should be noted that the height of the first rib 101a protruding beyond the inner circumference of the first cavity 101 is, that is, the height of the first rib 101a at... Figure 5 and Figure 6 The thickness in the Z direction is shown.

[0060] The beneficial effects here are: by providing a first rib 101a on the inner periphery of the first cavity 101 and limiting the thickness of the first rib 101a, the friction force when the main body 100 and the optical module 20 are inserted and mated can be increased, and the mechanical strength of the first cavity 101 of the main body 100 can also be strengthened. The first rib 101a will not occupy too much space and will not hinder the insertion and mating of the main body 100 and the optical module 20.

[0061] In the embodiments of this application, the first rib 101a is integrally formed on the inner periphery of the first cavity 101. The first rib 101a can take various shapes. For example, the first rib 101a is a square strip structure extending along the depth direction of the first cavity 101, or the first rib 101a can also be a cylindrical structure extending along the depth direction of the first cavity 101. The shape of the first rib 101a is not limited here.

[0062] In the embodiments of this application, an interference fit of 0.2 mm is provided in the depth and width directions of the first cavity 101, and the pull-out force of the optical module 20 is controlled in the range of 7.3 N to 9.7 N, so as to facilitate the insertion and mating between the main body 100 and the optical module 20.

[0063] For a specific embodiment, please refer to Figure 5 and Figure 6 The number of first ribs 101a is at least two, and each first rib 101a is distributed at intervals on the inner periphery of the first cavity 101; in the first direction, the size of each first rib 101a is equal to the depth of the first cavity 101.

[0064] It should be noted that the dimension of the first rib 101a in the first direction, that is, the dimension of the first rib 101a in the first direction, is... Figure 5 and Figure 6 The dimension in the X direction shown; the depth of the first cavity 101, that is, the depth of the first cavity 101 in... Figure 5 and Figure 6 The dimension in the X direction is shown.

[0065] The beneficial effect here is that by setting multiple first ribs 101a, the friction force when the main body 100 and the optical module 20 are plugged in can be further increased, and the mechanical strength of the first cavity 101 of the main body 100 can be further strengthened.

[0066] In the embodiments of this application, all the first ribs 101a are distributed at intervals on the inner periphery of the first cavity 101. The size and shape of all the first ribs 101a can be exactly the same or different. For example, all the first ribs 101a are square strip structures extending along the depth direction of the first cavity 101.

[0067] Please refer to Figure 5 and Figure 6 The inner circumference of the second cavity 102 is provided with a second rib 102a, and the height of the second rib 102a protruding from the inner circumference of the second cavity 102 is 0.5mm.

[0068] It should be noted that the height of the second rib 102a protruding beyond the inner circumference of the second cavity 102 is that the second rib 102a is at... Figure 5 and Figure 6 The thickness in the Z direction is shown.

[0069] The beneficial effects here are: by providing a second rib 102a on the inner periphery of the second cavity 102 and limiting the thickness of the second rib 102a, the friction force when the main body 100 and the optical module 20 are inserted and mated can be increased, and the mechanical strength of the second cavity 102 of the main body 100 can also be strengthened. The second rib 102a will not occupy too much space and will not hinder the insertion and mating of the main body 100 and the optical module 20.

[0070] In the embodiments of this application, the second rib 102a is integrally formed on the inner periphery of the second cavity 102. The second rib 102a can take various shapes. For example, the second rib 102a is a square strip structure extending along the depth direction of the second cavity 102, or the second rib 102a can also be a cylindrical structure extending along the depth direction of the second cavity 102. The shape of the second rib 102a is not limited here.

[0071] In the embodiments of this application, an interference fit of 0.2 mm is provided in the depth and width directions of the second cavity 102, and the pull-out force of the optical module 20 is controlled in the range of 7.3 N to 9.7 N, so as to facilitate the insertion and mating between the main body 100 and the optical module 20.

[0072] For a specific embodiment, please refer to Figure 5 and Figure 6 The number of second ribs 102a is at least two, and each second rib 102a is distributed at intervals on the inner periphery of the second cavity 102; in the first direction, the size of each second rib 102a is equal to the depth of the second cavity 102.

[0073] It should be noted that the dimension of the second rib 102a in the second direction, that is, the dimension of the second rib 102a in... Figure 5 and Figure 6 The dimension in the X direction shown; the depth of the second cavity 102, that is, the depth of the second cavity 102 in... Figure 5 and Figure 6 The dimension in the X direction is shown.

[0074] The beneficial effect here is that by setting multiple second ribs 102a, the friction force when the main body 100 and the optical module 20 are plugged in can be further increased, and the mechanical strength of the second cavity 102 of the main body 100 can be further strengthened.

[0075] In the embodiments of this application, all the second ribs 102a are spaced apart on the inner periphery of the second cavity 102. The size and shape of all the second ribs 102a can be exactly the same or different. For example, all the second ribs 102a are square strip structures extending along the depth direction of the second cavity 102.

[0076] Please refer to Figure 5 and Figure 6 The main body 100 is constructed as a thermoplastic elastomer structure with elasticity and flame retardancy; the Shore hardness of the main body 100 is 65 Shore A to 75 Shore A, and / or the volume resistivity of the main body 100 is 10^6 Ω·cm to 10^9 Ω·cm, and / or the electrostatic triboelectric voltage of the main body 100 is less than 1000V, and / or the electrostatic residual voltage of the main body 100 is less than 20V.

[0077] It is understandable that the main body 100 is flame retardant and can undergo elastic deformation, and its flame retardant performance has passed the UL94 HB level test (that is, the self-extinguishing time of a 3mm sample is less than 30s).

[0078] The beneficial effects here are: by setting the main body 100 as a thermoplastic elastomer structure with elasticity and flame retardancy, the main body 100 can be more compatible with the optical module 20 for plug-in, and can prevent static electricity, effectively protecting the optical module 20.

[0079] In the embodiments of this application, the Shore hardness value is an indicator used to measure the hardness of non-metallic materials such as rubber and plastics. The higher the Shore hardness value, the greater the hardness of the material. The Shore hardness value of the main body 100 can be 65 Shore A, 70 Shore A, or 75 Shore A.

[0080] In the embodiments of this application, volume resistivity is a physical quantity that measures the internal resistance characteristics of a material. It is defined as the resistance value of a conductor per unit length and unit cross-sectional area under the action of a unit electric field. The higher the volume resistivity, the worse the conductivity of the material. The volume resistivity of the body 100 can be 10^6 Ω·cm, 10^7 Ω·cm, or 10^9 Ω·cm.

[0081] In the embodiments of this application, electrostatic friction voltage refers to the voltage caused by the static charge generated by an object during friction or contact. The electrostatic friction voltage of the main body 100 can be designed to be 500V, 700V, or 900V.

[0082] In the embodiments of this application, residual electrostatic voltage refers to the voltage remaining on the surface of an object or in the test area after the electrostatic elimination device has been used. It is one of the important parameters for measuring the effectiveness of electrostatic elimination. The residual electrostatic voltage of the main body 100 can be designed to be 10V, 16V, or 18V.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A protective sleeve (10) for protecting a gold finger of an optical module (20), characterized in that, The protective sleeve (10) includes: The main body (100) has a first cavity (101) and a second cavity (102) arranged side by side along a first direction. One end of the first cavity (101) along the first direction is configured as an insertion interface (103). The end of the first cavity (101) away from the insertion interface (103) along the first direction is connected to the second cavity (102). The first direction is the depth direction of the protective sleeve (10). In a second direction, the height of the first cavity (101) is greater than the height of the second cavity (102). The second direction is the height direction of the protective sleeve (10). In the case where the optical module is in the first packaging form, the first end (21) of the optical module is inserted into and confined within the first cavity (101); When the optical module is in the second packaging form, the second end (23) of the optical module extends into the first cavity (101) and is confined within the second cavity (102).

2. The boot (10) of claim 1, wherein, The height of the first cavity (101) ranges from 12.35 mm to 12.45 mm; and / or the depth of the first cavity (101) ranges from 21.98 mm to 22 mm.

3. The protective sleeve (10) according to claim 1, characterized in that, The height of the second cavity (102) ranges from 9.05 mm to 9.15 mm; and / or the depth of the second cavity (102) ranges from 14.98 mm to 15 mm.

4. The protective sleeve (10) according to claim 1, characterized in that, The main body (100) also has a guide portion (104) which is configured as a guide chamfer on the inner periphery of the insertion interface (103).

5. The boot (10) of claim 4, wherein, The guide chamfer has an angle of 45° and a dimension of 0.5 mm in the first direction.

6. The boot (10) of claim 1, wherein, The first cavity (101) has a first rib (101a) on its inner periphery, and the first rib (101a) protrudes from the inner periphery of the first cavity (101) by a height of 0.5mm.

7. The boot (10) of claim 6, characterized in that The number of the first ribs (101a) is at least two, and each of the first ribs (101a) is distributed at intervals on the inner periphery of the first cavity (101); In the first direction, the size of each of the first ribs (101a) is equal to the depth of the first cavity (101).

8. The protective sleeve (10) according to claim 1, characterized in that, The second cavity (102) has a second rib (102a) on its inner periphery, and the second rib (102a) protrudes from the inner periphery of the second cavity (102) by a height of 0.5mm.

9. The boot (10) of claim 8, characterized in that, The number of the second ribs (102a) is at least two, and each of the second ribs (102a) is distributed at intervals on the inner periphery of the second cavity (102); In the first direction, the size of each of the second ribs (102a) is equal to the depth of the second cavity (102).

10. The protective sleeve (10) according to claim 1, characterized in that, The main body (100) is constructed as a thermoplastic elastomer structure with elasticity and flame retardancy; The Shore hardness of the body (100) is 65 Shore A to 75 Shore A, and / or the volume resistivity of the body (100) is 10^6 Ω·cm to 10^9 Ω·cm, and / or the electrostatic triboelectric voltage of the body (100) is less than 1000V, and / or the electrostatic residual voltage of the body (100) is less than 20V.

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