Strain relief and cable with strain relief

Abstract

The utility model provides a strain relief and a cable with the strain relief, the strain relief comprises: a first plastic member having a wire rod channel and a liquid flow channel, the wire rod channel and the liquid flow channel extending along an assembling direction, the assembling direction being parallel to the axial direction of the wire rod, the wire rod channel being used for accommodating the tail end of the wire rod; the second plastic part comprises a gap filling part and an overflow part, the liquid flow channel is filled with the gap filling part, the gap filling part penetrates through the liquid flow channel, the overflow part is located on the downstream of the gap filling part in the assembling direction and adheres to the first plastic part, and the overflow part and the gap filling part are integrally formed. According to the strain relief and the cable with the strain relief, the yield of the strain relief can be improved, the working hours can be reduced, and the manufacturing process is more stable.

Description

Technical Field

[0001] The utility model relates to a cable periphery, in particular to a strain eliminater and a cable with the strain eliminater. Background Art

[0002] Strain relief (SR) is generally divided into two parts: soft rubber and hard rubber. Both are fixed to the end of the wire by mold forming to eliminate the strain of the end of the wire connected to the device. Strain relief uses polyvinyl chloride (PVC) material. PVC is easy to deform when exposed to high temperature or long-term pressure, and the dimensional accuracy is reduced. In addition, in order to avoid the stress of the soft rubber after cooling and causing the hard rubber to deform, the hard rubber needs to be left to cool for at least four hours after molding, which has low production efficiency. Utility Model Content

[0003] The utility model aims to solve various problems of the existing strain eliminater and provides a strain eliminater and a cable with the strain eliminater.

[0004] To achieve the above-mentioned and other purposes, the utility model provides a strain eliminator for eliminating the strain of the end of a wire, which includes: a first plastic part, having a wire channel and a liquid flow channel, the wire channel and the liquid flow channel extending along an assembly direction, the assembly direction is parallel to the axial direction of the wire, the wire channel is used to accommodate the end of the wire; and a second plastic part, including a filling part and an overflow part, the filling part fills and penetrates the liquid flow channel, the overflow part is located downstream of the filling part along the assembly direction, and the overflow part is adhered to the first plastic part, wherein the overflow part and the filling part are integrally formed.

[0005] Optionally, the liquid flow channel includes a first flow channel and a second flow channel, the first flow channel is connected to the wire channel, and the second flow channel is not connected to the wire channel.

[0006] Optionally, the first plastic part further has a vertical well vertically connected to the liquid flow channel, and the filling portion fills the vertical well.

[0007] Optionally, the overflow portion also extends opposite to the assembling direction.

[0008] Optionally, the first plastic part further has a reverse flow channel extending opposite to the assembling direction, and the overflow portion fills the reverse flow channel.

[0009] Optionally, the second plastic part further includes a neck portion, which is located upstream of the filling portion along the assembling direction, and the neck portion, the overflow portion and the filling portion are integrally formed.

[0010] Optionally, the first plastic part further has a hole perpendicular to the assembling direction, and the neck fills the hole.

[0011] The utility model further provides a cable with a strain reliever, comprising: the strain reliever according to the above-mentioned method; and a wire, wherein the end of the wire is arranged in the wire channel.

[0012] Thus, the strain reliever and the cable having the strain reliever of the utility model can increase the fixing ability between the first plastic part and the second plastic part through the overflow part and the filling part. After the second plastic part is molded, the combined parts will not be twisted and deformed due to the stress of thermal expansion and contraction, which can improve the yield of the strain reliever and reduce the working hours, and the process is more stable.

[0013] In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the description and drawings are only used to illustrate the present invention and are not intended to limit the scope of rights of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An exploded view of the strain relief device of the first embodiment of the utility model;

[0015] Figure 2 It is a three-dimensional schematic diagram of a strain relief device according to a first embodiment of the utility model;

[0016] Figure 3 It is a three-dimensional schematic diagram of the first plastic part of the second embodiment of the utility model;

[0017] Figure 4 It is a three-dimensional schematic diagram of a strain relief device according to a second embodiment of the utility model;

[0018] Figure 5 It is a three-dimensional schematic diagram of the first plastic part of the third embodiment of the utility model;

[0019] Figure 6 A cross-sectional schematic diagram of a strain relief device according to a third embodiment of the present invention;

[0020] Figure 7 The present invention is a flow chart of a method for manufacturing a cable with a strain relief device.

[0021] Reference numerals

[0022] 100 Strain relief

[0023] 100a strain relief

[0024] 100b strain relief

[0025] 1. First plastic part

[0026] 11 Wire Channel

[0027] 11a Cable channel

[0028] 11b Cable Channel

[0029] 12 Liquid flow channel

[0030] 121 First runner

[0031] 122 Second flow channel

[0032] 12a Liquid flow channel

[0033] 12b Liquid flow channel

[0034] 13 Shaft

[0035] 14 Reverse flow channel

[0036] 15. Drilling

[0037] 1a First plastic part

[0038] 1b First plastic part

[0039] 2 Second plastic part

[0040] 21 Filling

[0041] 22 Overflow

[0042] 22b Overflow

[0043] 23 Neck

[0044] 2a Second plastic part

[0045] 2b Second plastic part

[0046] 3 Wire

[0047] d Assembly direction

[0048] Steps S101 to S105 DETAILED DESCRIPTION

[0049] In order to fully understand the present utility model, the present utility model is described in detail through the following specific embodiments and in conjunction with the accompanying drawings. Those skilled in the art can understand the purpose, features and effects of the present utility model from the contents disclosed in this specification. It should be noted that the present utility model can be implemented or applied through other different specific embodiments, and the various details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the utility model points of the present utility model. In addition, the drawings of the present utility model are only simple schematic illustrations and are not depicted according to actual dimensions. The following implementation methods will further explain the relevant technical contents of the present utility model in detail, but the disclosed contents are not intended to limit the claims of the present utility model. The description is as follows:

[0050] like Figure 1 and Figure 2 As shown, the strain reliever 100 of the first embodiment of the present invention is used to relieve the strain at the end of the wire 3. The strain reliever 100 comprises: a first plastic part 1 and a second plastic part 2.

[0051] The first plastic part 1 has a wire channel 11 and a liquid flow channel 12. The wire channel 11 and the liquid flow channel 12 are parallel to each other and extend along the assembly direction d. The assembly direction d is parallel to the axial direction of the wire 3. The wire channel 11 is used to accommodate the end of the wire 3. The wire channel 11 and the liquid flow channel 12 may be connected or not connected. In this embodiment, the liquid flow channel 12 is arranged on the periphery of the wire channel 11 and connected to the wire channel 11. The first plastic part 1 is preferably a mixed material of polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS), which has hard and wear-resistant properties, and is preferably pre-manufactured by injection molding or the like, with higher precision. However, the utility model is not limited thereto.

[0052] The second plastic part 2 includes a filling portion 21 and an overflow portion 22. The filling portion 21 fills and penetrates the liquid flow channel 12. The overflow portion 22 is located downstream of the filling portion 21 along the assembly direction d. The overflow portion 22 adheres to the first plastic part 1. The second plastic part 2 is formed by filling the end surface of the first plastic part 1 upstream in the assembly direction d with liquid glue after the wire 3 passes through the wire channel 11. The liquid glue penetrates into the liquid flow channel 12 along the assembly direction d and fills and penetrates the liquid flow channel 12, and overflows from the downstream end surface of the first plastic part 1. When the liquid glue solidifies to form the second plastic part 2, the portion of the second plastic part 2 located in the liquid flow channel 12 forms a filling portion 21, which not only fills the liquid flow channel 12 but also firmly fixes the first plastic part 1. At the same time, the portion of the liquid glue overflowing from the downstream end face of the first plastic part 1 solidifies to form an overflow portion 22, which also firmly adheres to the end face of the first plastic part 1. Therefore, the overflow portion 22 and the filling portion 21 are integrally formed and firmly fixed to the first plastic part 1. The specific contour shape of the second plastic part 2 can be varied in many ways and is formed by a casting mold.

[0053] In detail, Figure 7 As shown, the manufacturing method of the cable with a strain relief device of the utility model comprises the following steps:

[0054] In step S101, a first plastic part 1 having a wire channel 11 and a liquid flow channel 12 is provided. The first plastic part 1 can be pre-manufactured by injection molding or other methods, and has a higher precision.

[0055] In step S102 , the end of the wire 3 is passed through the wire channel 11 , so that the assembly direction d of the first plastic component 1 is parallel to the axial direction of the wire 3 .

[0056] In step S103, liquid glue is dripped from the upstream of the first plastic part 1 along the assembly direction d, so that the liquid glue flows into and fills the liquid flow channel 12 along the assembly direction d. The liquid glue can also be a PC+ABS material, or other fluid and curable resin material.

[0057] In step S104, the liquid glue is continuously dripped, so that the liquid glue passes through the liquid flow channel 12 and overflows on the downstream end surface of the first plastic part 1 along the assembly direction d. The range of the liquid glue overflow can be controlled by using a casting mold.

[0058] In step S105, the liquid glue is cured to make the liquid glue adhere to the first plastic part 1 and form the second plastic part 2. The curing method depends on the material selected for the liquid glue, and is usually cured by baking, or can be cured by light or other methods.

[0059] In summary, after the liquid glue solidifies, the overflow portion 22 and the filling portion 21 can increase the fixing ability between the first plastic part 1 and the second plastic part 2. After the second plastic part 2 is formed, the combined parts will not be twisted and deformed due to the stress of thermal expansion and contraction. This can improve the yield of the strain relief device 100, reduce working hours, and make the process more stable.

[0060] Furthermore, in this embodiment, the second plastic part 2 further includes a neck 23, which is located upstream of the filling portion 21 along the assembly direction d. The neck 23 is where the liquid glue is first added, and the neck 23, the overflow portion 22 and the filling portion 21 are integrally formed. The specific shape of the neck 23 is not limited and is usually determined by the shape of the mold.

[0061] Furthermore, in this embodiment, the first plastic part 1 further has a bore 15 perpendicular to the assembly direction d, and the neck 23 fills the bore 15 to further increase the fixing ability between the first plastic part 1 and the second plastic part 2 .

[0062] like Figure 3 and Figure 4 As shown, the present invention further proposes a strain eliminator 100a of a second embodiment, which has a first plastic part 1a and a second plastic part 2a. The main difference between the first plastic part 1a and the first plastic part 1 of the first embodiment is that the liquid flow channel 12a of the first plastic part 1a includes a first flow channel 121 and a second flow channel 122. The first flow channel 121 is connected to the wire channel 11a, and the second flow channel 122 is not connected to the wire channel 11a. That is to say, when the liquid glue flows into the first flow channel 121 and forms the filling portion 21, it can further fix the first plastic part 1a and the wire 3, and fill the gap between the first plastic part 1a and the wire 3. However, the present invention is not limited to this. In other embodiments, the first plastic part may only have a liquid flow channel connected to the wire channel (such as the first embodiment), or only have a liquid flow channel not connected to the wire channel. The cross-sectional size and shape of the liquid flow channel can be determined according to the requirements, and the liquid flow channel can be opened at a position where the fixing ability between the first plastic part 1 and the second plastic part 2 is to be enhanced.

[0063] Furthermore, in this embodiment, the first plastic part 1a also has a vertical shaft 13 vertically connected to the liquid flow channel 12a, and the filling portion of the second plastic part 2a fills the vertical shaft 13. Therefore, the second plastic part 2a can enhance the fixing ability between the first plastic part 1 and the second plastic part 2 from other directions.

[0064] like Figure 5 and Figure 6As shown, the utility model further proposes a strain eliminator 100b of the third embodiment, which has a first plastic part 1b and a second plastic part 2b. The first plastic part 1b also has a similar wire channel 11b and a liquid flow channel 12b. The main difference between the first plastic part 1b and the first plastic part 1 of the first embodiment is that the first plastic part 1b also has a reverse flow channel 14 extending in the opposite direction of the assembly direction d, and the overflow part 22b fills the reverse flow channel 14. In other words, after the liquid glue flows into the liquid flow channel 12b, it first overflows from the end face of the first plastic part 1b downstream along the assembly direction d, and then flows into the reverse flow channel 14 in the opposite direction of the assembly direction d, and then solidifies to form the overflow part 22b. Such an overflow part 22b has a state of extending in the opposite direction of the assembly direction d. Therefore, the second plastic part 2b can further enhance the fixing ability between the first plastic part 1 and the second plastic part 2. However, the reverse flow channel 14 is not necessarily a necessary way to make the overflow portion 22b extend in the opposite direction to the assembly direction d; the liquid glue can be made to flow in the opposite direction along the structure of the first plastic part 1b by changing the structural design of the first plastic part 1b.

[0065] The present invention further provides a cable with a strain reliever, which comprises any one of the strain relievers described above and a wire 3. The end of the wire 3 is arranged in a wire channel.

[0066] The present invention has been disclosed in the above with preferred embodiments, but those skilled in the art should understand that the embodiments are only used to describe the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiments should be set as being included in the scope of the present invention. Therefore, the protection scope of the present invention shall be based on the content scope defined in the claims.

Claims

1. A strain reliever for eliminating strain at the end of a wire, characterized in that: The strain relief device comprises: A first plastic part having a wire channel and a liquid flow channel, wherein the wire channel and the liquid flow channel extend along an assembly direction parallel to the axial direction of the wire, and the wire channel is used to accommodate the end of the wire; and The second plastic part comprises a filling part and an overflow part, wherein the filling part fills and penetrates the liquid flow channel, the overflow part is located downstream of the filling part along the assembly direction, and the overflow part is adhered to the first plastic part. Wherein, the overflow portion and the filling portion are formed integrally.

2. The strain relief device according to claim 1, characterized in that The liquid flow channel includes a first flow channel and a second flow channel, the first flow channel is connected to the wire channel, and the second flow channel is not connected to the wire channel.

3. The strain relief device according to claim 1, characterized in that The first plastic part also has a vertical well vertically connected to the liquid flow channel, and the filling portion fills the vertical well.

4. The strain relief device according to claim 1, characterized in that The overflow portion also extends opposite to the assembling direction.

5. The strain relief device according to claim 4, characterized in that The first plastic part further has a reverse flow channel extending in the opposite direction to the assembling direction, and the overflow portion fills the reverse flow channel.

6. The strain relief device according to claim 1, characterized in that The second plastic part further includes a neck portion, which is located upstream of the filling portion along the assembling direction, and the neck portion, the overflow portion and the filling portion are integrally formed.

7. The strain relief device according to claim 6, characterized in that The first plastic part also has a hole perpendicular to the assembling direction, and the neck fills the hole.

8. A cable with a strain relief, characterized in that: The cable with strain relief comprises: The strain relief device according to any one of claims 1 to 7; and A wire, the end of which is arranged in the wire channel.

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