Thin sleeve

Abstract

The utility model relates to a thin sleeve, which belongs to the field of thin sleeves, and comprises an inner liner tube, a middle support steel wire layer and a first protective layer which are distributed from inside to outside, a second protective layer is arranged on the outer side of the first protective layer, the second protective layer is made of an elastic material, and the hardness of the second protective layer is smaller than that of the first protective layer. The second protection layer is arranged, the hardness of the second protection layer is smaller than that of the first protection layer, the product performance is guaranteed while the binding reliability of the binding belt is guaranteed, and when a plurality of thin sleeves are bound at the same time, the size of the thin sleeves can be reduced when the thin sleeves are bound at the same time through cooperation between the first protrusions and the first grooves; and the friction force between the ribbon and the second protection layer is improved through the first grooves, relative sliding between the ribbon and the second protection layer is prevented, and the reliability of bundling the thin sleeves through the ribbon is further improved.

Description

Technical Field

[0001] The utility model relates to a thin cannula, belonging to the field of thin cannulas. Background Art

[0002] The thin sleeve is mainly used in the control system of automobile cable assembly, mainly controlling the lifting and lowering of automobile window glass, the opening and closing control of automobile doors, front and rear trunks, fuel tank caps, etc., mainly involving the passenger car industry.

[0003] like Figure 5 As shown, the thin casing in the prior art consists of three parts: an inner liner, an intermediate supporting steel wire layer, and an outer protective layer. With the development of the automotive field, cable ties are used more and more widely. When the outer protective layer of the conventional casing is harder, the cable tie is not firmly tied, and the reliability of the cable tie is low. When a softer outer protective layer is used, the cable tie can be tied tightly, but the product's tightening force is insufficient and the performance does not meet the standards.

[0004] Therefore, a thin sleeve is needed to ensure the reliability of cable tie bundling while ensuring product performance. Summary of the Invention

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, a thin sleeve is provided which ensures the reliability of cable tie bundling while ensuring product performance.

[0006] The technical solution adopted by the present invention to solve the above problems is: a thin sleeve, including an internal liner, an intermediate supporting steel wire layer and a first protective layer distributed from the inside to the outside, a second protective layer is provided on the outside of the first protective layer, the second protective layer is made of elastic material, and the hardness of the second protective layer is less than that of the first protective layer.

[0007] Preferably, the second protective layer is made of thermoplastic sulfide, and the first protective layer is made of polypropylene.

[0008] Preferably, the outer surface of the second protective layer is provided with a first groove and a first protrusion, and the first groove matches the first protrusion.

[0009] Preferably, the first grooves and the first protrusions are provided in plurality, and the plurality of first grooves and the plurality of first protrusions are distributed circumferentially with the second protective layer as the center, and the plurality of first grooves and the plurality of first protrusions are arranged at intervals.

[0010] Preferably, the first protrusion is arc-shaped.

[0011] Preferably, the outer surface of the first protective layer is provided with a plurality of second protrusions and a plurality of second grooves, the plurality of second protrusions and the plurality of second grooves are circumferentially distributed with the first protective layer as the center, and the plurality of second protrusions and the plurality of second grooves are arranged at intervals;

[0012] The inner surface of the second protective layer is provided with a plurality of third protrusions and a plurality of third grooves, the plurality of third protrusions and the plurality of third grooves are distributed circumferentially with the second protective layer as the center, and the plurality of third protrusions and the plurality of third grooves are arranged at intervals;

[0013] The second protrusions match the third grooves and are equal in number, and the second protrusions are inserted into the third grooves;

[0014] The third protrusions match the second grooves and are equal in number, and the third protrusions are inserted into the second grooves.

[0015] Preferably, the cross-sectional shapes of the second protrusion and the second protrusion along the diameter direction of the first protective layer are both semicircular.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The utility model provides a thin sleeve, which ensures the reliability of the cable tie bundling while ensuring product performance by providing a second protective layer, and the hardness of the second protective layer is less than that of the first protective layer. Moreover, when multiple thin sleeves are bundled at the same time, the cooperation between the first protrusion and the first groove can not only reduce the volume of the multiple thin sleeves when bundled at the same time, but also reduce the slippage between two adjacent thin sleeves, thereby improving the bundling stability. In addition, the first groove increases the friction between the cable tie and the second protective layer, prevents relative sliding between the cable tie and the second protective layer, and further improves the reliability of the cable tie in bundling the thin sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of a thin cannula of the utility model;

[0019] Figure 2 This is a radial cross-sectional view of a thin cannula of the utility model;

[0020] Figure 3 Schematic diagram of the structure of the first protective layer;

[0021] Figure 4 is a schematic structural diagram of the second protective layer;

[0022] Figure 5 It is a structural diagram of a thin cannula in the prior art.

[0023] in:

[0024] Internal liner 1, intermediate support wire layer 2, first protective layer 3, second protective layer 4;

[0025] A second protrusion 31 and a second groove 32;

[0026] A first groove 41 , a first protrusion 42 , a third protrusion 43 , and a third groove 44 . DETAILED DESCRIPTION

[0027] like Figure 1-4 As shown, a thin sleeve in this embodiment includes an inner liner 1, an intermediate supporting steel wire layer 2 and a first protective layer 3 distributed from the inside to the outside, a second protective layer 4 is provided on the outside of the first protective layer 3, and the second protective layer 4 is made of elastic material. The hardness of the second protective layer 4 is less than that of the first protective layer 3. The material of the second protective layer 4 is specifically thermoplastic sulfide, which is mainly composed of a combination of thermoplastic elastomer and vulcanized rubber, combining the excellent elasticity of rubber and the processing characteristics of plastic. The material of the first protective layer 3 is polypropylene, which is a thermoplastic plastic. The hardness of polypropylene is greater than that of thermoplastic sulfide. When the thin sleeve is bundled with a cable tie, the elasticity of the second protective layer 4 can ensure the reliability of the cable tie. Secondly, the product performance is guaranteed by the first protective layer 3. In addition, the materials of thermoplastic sulfide and polypropylene can also facilitate the improvement of the bonding force between the first protective layer 3 and the second protective layer 4 to prevent delamination.

[0028] The outer surface of the second protective layer 4 is provided with a first groove 41 and a first protrusion 42. The first groove 41 and the first protrusion 42 are both provided with a plurality of first grooves 41 and a plurality of first protrusions 42. The plurality of first grooves 41 and the plurality of first protrusions 42 are uniformly distributed circumferentially with the second protective layer 4 as the center. The plurality of first grooves 41 and the plurality of first protrusions 42 are arranged at intervals. The first grooves 41 match the first protrusions 42. When the cable tie is tied, the friction between the cable tie and the second protective layer 4 is increased by the first grooves 41, thereby preventing relative sliding between the cable tie and the second protective layer 4, thereby further improving the reliability of the cable tie in tying the thin sleeve.

[0029] In addition, when the cable tie needs to bundle multiple thin tubes at the same time, one of the first protrusions 42 of one of the two adjacent second protective layers 4 is inserted between one of the first grooves 41 of the other second protective layer 4. The cooperation between the first protrusion 42 and the first groove 41 can not only reduce the volume of the multiple thin tubes when being bundled simultaneously, but also reduce the slippage between the two adjacent thin tubes, thereby improving the bundling stability.

[0030] The first protrusion 42 is arc-shaped;

[0031] The outer surface of the first protective layer 3 is provided with a plurality of second protrusions 31 and a plurality of second grooves 32. The plurality of second protrusions 31 and the plurality of second grooves 32 are uniformly distributed circumferentially with the first protective layer 3 as the center, and the plurality of second protrusions 31 and the plurality of second grooves 32 are arranged at intervals.

[0032] The inner surface of the second protective layer 4 is provided with a plurality of third protrusions 43 and a plurality of third grooves 44. The plurality of third protrusions 43 and the plurality of third grooves 44 are evenly distributed circumferentially around the second protective layer 4 and are arranged at intervals.

[0033] The second protrusions 31 match the third grooves 44 and are equal in number, and the second protrusions 31 are inserted into the third grooves 44;

[0034] The third protrusions 43 match the second grooves 32 and are equal in number, and the third protrusions 43 are inserted into the second grooves 32;

[0035] The cross-sectional shapes of the second protrusion 31 and the second protrusion 31 along the diameter direction of the first protective layer 3 are both semicircular;

[0036] The cooperation between the second protrusion 31 and the third groove 44 and the cooperation between the third protrusion 43 and the second groove 32 improves the bonding force between the first protective layer 3 and the second protective layer 4, thereby preventing relative movement between the first protective layer 3 and the second protective layer 4.

[0037] In summary, by providing the second protective layer 4, and the hardness of the second protective layer 4 is less than the hardness of the first protective layer 3, the reliability of the cable tie bundling is ensured while the product performance is guaranteed. Moreover, when multiple thin sleeves are bundled at the same time, the cooperation between the first protrusion 42 and the first groove 41 can not only reduce the volume of multiple thin sleeves when bundled at the same time, but also reduce the slippage between two adjacent thin sleeves, thereby improving the bundling stability. In addition, the friction between the cable tie and the second protective layer 4 is increased by the first groove 41, thereby preventing relative sliding between the cable tie and the second protective layer 4, thereby further improving the reliability of the cable tie in bundling the thin sleeves.

[0038] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A thin casing, comprising an inner liner (1), an intermediate support wire layer (2) and a first protective layer (3) arranged from the inside to the outside, characterized in that: A second protective layer (4) is provided on the outer side of the first protective layer (3); the second protective layer (4) is made of elastic material; and the hardness of the second protective layer (4) is smaller than that of the first protective layer (3).

2. A thin cannula according to claim 1, characterized in that: The material of the second protective layer (4) is thermoplastic sulfide, and the material of the first protective layer (3) is polypropylene.

3. The thin cannula according to claim 1, characterized in that: The outer surface of the second protective layer (4) is provided with a first groove (41) and a first protrusion (42), and the first groove (41) matches the first protrusion (42).

4. A thin cannula according to claim 3, characterized in that: A plurality of the first grooves (41) and the first protrusions (42) are provided. The plurality of first grooves (41) and the plurality of first protrusions (42) are circumferentially distributed with the second protective layer (4) as the center. The plurality of first grooves (41) and the plurality of first protrusions (42) are arranged at intervals.

5. A thin cannula according to claim 3 or 4, characterized in that: The first protrusion (42) is arc-shaped.

6. The thin cannula according to claim 1, characterized in that: The outer surface of the first protective layer (3) is provided with a plurality of second protrusions (31) and a plurality of second grooves (32), the plurality of second protrusions (31) and the plurality of second grooves (32) are all distributed circumferentially with the first protective layer (3) as the center, and the plurality of second protrusions (31) and the plurality of second grooves (32) are arranged at intervals; The inner surface of the second protective layer (4) is provided with a plurality of third protrusions (43) and a plurality of third grooves (44), the plurality of third protrusions (43) and the plurality of third grooves (44) are distributed circumferentially with the second protective layer (4) as the center, and the plurality of third protrusions (43) and the plurality of third grooves (44) are arranged at intervals; The second protrusions (31) match the third grooves (44) and are equal in number, and the second protrusions (31) are inserted into the third grooves (44); The third protrusions (43) match the second grooves (32) and are equal in number, and the third protrusions (43) are inserted into the second grooves (32).

7. The thin cannula according to claim 6, characterized in that: The cross-sectional shapes of the second protrusion (31) and the second protrusion (31) along the diameter direction of the first protective layer (3) are both semicircular.

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