CN113764914B - Cable structure and cable connection structure - Google Patents
Cable structure and cable connection structure Download PDFInfo
- Publication number
- CN113764914B CN113764914B CN202110990688.2A CN202110990688A CN113764914B CN 113764914 B CN113764914 B CN 113764914B CN 202110990688 A CN202110990688 A CN 202110990688A CN 113764914 B CN113764914 B CN 113764914B
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- Prior art keywords
- cable
- elastic needle
- elastic
- head
- connector
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
- H01R11/20—End pieces terminating in a needle point or analogous contact for penetrating insulation or cable strands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
- H01R4/2406—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation having needles or pins
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to the field of wire protection, in particular to a cable structure and a cable connection structure. According to the embodiment of the invention, the elastic needle is inserted into the end part of the cable, and the stress release is carried out on the connection part of the cable and other parts by utilizing the elastic force of the elastic needle, so that the original SR (stress release) structure manufactured by thermoplastic molding by utilizing TPE (thermoplastic elastomer) materials is replaced. The defects of the original SR structure in the aspects of installation, use, production and manufacturing cost and the like are overcome, the production efficiency of the stress release structure is improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the field of wire protection, in particular to a cable structure and a cable connection structure.
Background
At present, almost all electric wire products have a design of a Stress Relief (SR) structure in a region below a connector, so that a user can play a role in buffering when the wire is bent in the actual use process, and the wire is prevented from being damaged due to excessive bending through the SR. The conventional SR structure is generally manufactured by thermoplastic molding by adopting TPE (thermoplastic elastomer) materials, and there are two modes of assembling the SR to the wire, one mode is to mold the SR on-line and then assemble other parts, the other mode is to mold the SR part off-line and then thread the SR part to the wire for dispensing and fixing, and then assemble other parts, both the two methods are complex, so that no matter which method is used, the working hours are consumed, and the TPE raw material is generally expensive, so the material cost is high.
Disclosure of Invention
In view of the above, the present invention is to provide a cable structure and a cable connection structure for replacing the existing SR structure, improving the production efficiency of the stress relief structure, and reducing the production cost.
The embodiment of the invention provides a cable structure, which comprises: a cable; and an elastic needle having one end inserted into an end of the cable and fixed.
Further, the elastic needle is made of super-elastic materials.
Further, the elastic needle includes: a head part in a cone structure, the head part being inserted into the cable; and the tail part is of a column structure, is connected with the bottom surface of the head part, has the diameter equal to that of the bottom surface of the head part, and is positioned at the device connecting end of the cable.
Further, the ratio of the total length of the elastic needle to the tail length is more than or equal to 1.8 and less than or equal to 2.5.
Further, the tip of the head is rounded.
Further, the tip of the head is fixed to the cable by cementing.
Further, the elastic needle is made of nickel-titanium alloy.
Further, the cable includes: a plurality of wires arranged around a center, leaving a void at the center for the elastic needle to be inserted, the elastic needle being located in the void; and the outer skin is wrapped outside the plurality of wires.
Further, the head part is of a cone structure, the tail part is of a cylinder structure, and the elastic force of the elastic needle in each radial direction is equal.
Further, an embodiment of the present invention further provides a cable connection structure, including: a cable structure as described above; and the connector is fixedly connected with one end of the cable, which is provided with the elastic needle.
Further, the connector is a USB connector or a Lighting connector or a microUSB connector or a TypeC connector or a wireless charging transmitter or a power adapter or a power plug.
According to the embodiment of the invention, the elastic needle is inserted into the end part of the cable, and the stress release is carried out on the connection part of the cable and other parts by utilizing the elastic force of the elastic needle, so that the original SR (stress release) structure manufactured by thermoplastic molding by utilizing TPE (thermoplastic elastomer) materials is replaced. The defects of the original SR structure in the aspects of installation, use, production and manufacturing cost and the like are overcome, the production efficiency of the stress release structure is improved, and the production cost is reduced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a part of the internal structure of a cable structure according to an embodiment of the present invention;
FIG. 2 is a schematic exploded view of a cable structure according to an embodiment of the present invention;
FIG. 3 is a schematic view showing a specific structure of an elastic needle according to an embodiment of the present invention;
fig. 4 is a schematic structural view of an end face of a cable according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the end face of the cable according to the embodiment of the invention after the elastic needle is inserted;
FIG. 6 is a schematic diagram of a bending test result of a cable structure according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a torsion test of a cable structure according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the overall structure of a cable connection structure according to an embodiment of the present invention;
fig. 9 is a schematic exploded view of a cable connection structure according to an embodiment of the invention.
Legend: 1. a cable; 11. a wire; 12. a skin; 13. a void; 2. a connector; 3. an elastic needle; 31. a head; 32. and a tail part.
Detailed Description
The present invention is described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. The present invention will be fully understood by those skilled in the art without the details described herein. Well-known methods, procedures, flows, components and circuits have not been described in detail so as not to obscure the nature of the invention.
Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.
Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or being "connected between" two nodes, it can be directly coupled or connected to the other element or intervening elements may be present and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled to" or "directly connected to" another element, it means that there are no intervening elements present between the two.
Unless the context clearly requires otherwise, the words "comprise," "comprising," and the like in the description are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1 and 2, the cable structure of the embodiment of the present invention includes a cable 1 and an elastic needle 3. Wherein one end of the elastic needle 3 is inserted into the end of the cable 1 and fixed. In the general cable structure, since the cable 1 is flexible, deformation such as bending and the like can often occur in the use process, and the components connected with the cable are generally rigid, so that stress concentration phenomenon can occur at the connection part of the cable 1 and other components, and excessive bending deformation can occur at the connection part of the cable 1 and other components due to bending of the cable 1, so that the damage to the internal circuit or the outer skin of the cable 1 is caused, and normal use is affected. Therefore, in this embodiment, after the elastic needle 3 is disposed at the end of the cable 1, and the elastic needle 3 is inserted into the end of the cable 1, when the cable 1 is bent, the elastic needle 3 can bear a part of bending moment due to the elasticity of the elastic needle 3, and reduce stress concentration on the cable 1, so that bending deformation of the cable 1 is reduced, and the probability of damage to the cable 1 is reduced. Compared with the widely used stress release structure of TPE (thermoplastic elastomer) materials arranged on the outer side of the cable 1, the elastic needle 3 of the embodiment has the advantages of simple structure, more convenient production and installation and lower cost.
As shown in fig. 4 and 5, in one particular embodiment, the cable 1 includes a plurality of wires 11 and a sheath 12. Wherein a plurality of wires 11 are arranged around a center, leaving a void 13 in the center for the insertion of the elastic needle 3, the elastic needle 3 being located in the void 13. The outer sheath 12 is wrapped around the plurality of wires 11. The plurality of wires 11 are used for transmitting different electric signals or grounding respectively, and the sheath 12 wraps the plurality of wires 11 into one cable. The elastic needle 3 is inserted into the hole 13 and then is located at the center of the cable 1, a plurality of wires 11 are surrounded around the elastic needle 3, and the elastic needle 3 can play a supporting role on the wires 11 in all directions when the cable 1 is stressed and bent, so that a stress releasing function is realized.
In a specific embodiment, the elastic needle 3 is made of a super elastic material. Superelasticity refers to the phenomenon in which a material has an elastic potential energy function, which is a scalar function of the strain tensor, whose derivative of the strain component is the corresponding stress component, and strain automatically recovers upon unloading. That is, the super elastic material is deformed when an external force is applied, but is restored when the external force is removed. The elastic needle 3 is made of super-elastic materials, so that after the cable 1 is bent in the use process, the original shape of the cable 1 can be quickly recovered under the elastic action of the elastic needle 3, and the cable 1 is prevented from being damaged due to long-time excessive bending deformation.
In a specific embodiment, the elastic needle 3 is made of nickel-titanium alloy. The nickel-titanium alloy is an alloy material with super elasticity, which is widely used at present and has better effect, the expansion rate of the nickel-titanium alloy is more than 20 percent, the fatigue life of the nickel-titanium alloy reaches 7 times of 1 x 10, the damping characteristic of the nickel-titanium alloy is 10 times higher than that of a common spring, and the corrosion resistance of the nickel-titanium alloy is superior to that of the medical stainless steel which is the best at present, so that the nickel-titanium alloy can meet the application requirements of various projects and medicine, and is a very excellent functional material. The elastic needle 3 is applied to the cable structure of the embodiment, so that the cable structure can be ensured to have better use effect and longer service life.
As shown in fig. 6 and 7, according to the reliability test results performed on the present cable structure and the conventional SR structure of the same specification, the cable structure using the nickel-titanium alloy has an effective service life longer than that of the conventional SR structure, both in the bending test and the torsion test. In the 180-degree bending test, the bending resistance times of the cable structure of the embodiment can reach about 1250-1500 times, and the traditional SR structure only has about 1050-1300 times. In the torsion test, the number of torsion resistance times of the cable structure using the nitinol elastic needle 3 is about 1200-1350 times, whereas the conventional SR structure is only about 1050-1200 times.
As shown in fig. 3, the elastic needle 3 includes a head 31 and a tail 32. Wherein the head 31 has a cone structure, and a cone tip is inserted into the cable 1. The tail 32 is in a cylindrical structure, the end face of the cylinder is connected with the bottom face of the head 31, the diameter of the end face is equal to that of the bottom face of the head 31, and the tail 32 is located at the device connection end of the cable 1. Specifically, the device connection end of the cable 1 is a connection end where the cable 1 is connected to other components. The elastic force of the elastic needle 3 at the time of bending is related to the diameter of the elastic needle 3, that is, the smaller the diameter is, the smaller the elastic force is, and the larger the deformation amount is under the action of the same external force. Therefore, the elastic needle 3 is divided into the head 31 and the tail 32, and the head 31 is provided in a cone structure, so that the elastic force of the elastic needle 3 to the cable 1 gradually decreases from the direction close to the device connection end to the direction far from the device connection end at the position where the head 31 is located after the head 31 is inserted into the cable 1. Therefore, when the cable 1 is stressed and bent, one end of the cable 1 close to the connecting end of the device is deformed less, stress concentration at the connecting part of the cable 1 and other parts is effectively eliminated, and after a certain distance is kept away from the other parts, the deformation of the cable 1 can be gradually increased until the deformation at the tip end of the elastic needle 3 is almost the same as that of the cable without the elastic needle 3. The head 31 with the cone structure in this embodiment can buffer the pressure between the elastic needle 3 and the cable 1, so as to avoid the problem that the elastic needle 3 is too large in elasticity, and stress concentration is generated between the end of the elastic needle 3 inserted into one end of the cable 1 and the wire 11 when the elastic needle is bent, so that the cable 1 is damaged inside.
In a specific embodiment, the head 31 is in a cone structure, the tail 32 is in a cylinder structure, and the elastic force of the elastic needle 3 in each radial direction is equal, so that the same supporting force given by the elastic needle 3 can be ensured when the cable bends in each direction. The bending resistance and the torsional strength of the cylinder are larger than those of other cylinders, the service life of the cable structure can be guaranteed, and moreover, the elastic needle 3 is made into a cone and a cylinder, so that the elastic needle is more convenient to be inserted into the hole 13 for installation.
In a specific embodiment, the ratio of the total length of the elastic needle 3 to the length of the tail portion 32 is greater than or equal to 1.8 and less than or equal to 2.5, and the ratio of the total length of the elastic needle 3 to the diameter of the tail portion 32 is greater than or equal to 23.5 and less than or equal to 32.5. In this range, it can be ensured that the tail portion 32 provides sufficient support for the connection between the cable 1 and the connector 2, and that the taper of the head portion 31 provides a sufficient buffer distance for the cable 1, so that the cable structure achieves a good use effect. The specific length and diameter of the elastic needle 3 are not fixed and can be determined within the above-mentioned ratio according to the specific requirements of the cable 1. For example, in some cell phone charging wires, the diameter of the spring pin 3 should be approximately equal to the diameter of the wire 11, with a gap of no more than 25% of the wire 11 diameter.
In a specific embodiment, the tip of the head 31 is rounded to avoid the tip from puncturing the wire 11 in contact with it from the inside when the cable 1 is bent, reducing the damage rate of the cable 1.
In a specific embodiment, the tip of the head 31 is fixed to the cable 1 by gluing. Specifically, the tip of the head 31 may be first glued, then the elastic needle 3 is inserted into the cable 1, and fixation can be completed after the glue is solidified, so that the operation is simple and convenient. In addition, the tip is fixed by gluing, and after the tip is glued and fixed, the tip can be wrapped by glue, and the glue is flexible, so that a buffer can be formed between the tip of the head 31 and the wire 11 adjacent to the tip, the wire 11 is further prevented from being pierced from the inside by the tip when the cable 1 is bent, and the damage probability of the cable 1 in the use process is further reduced.
As shown in fig. 7 and 9, the embodiment of the present invention further provides a cable connection structure, where the cable connection structure includes the cable structure and the connector 2, and the connector 2 is fixedly connected to one end of the cable 1, where the elastic needle 3 is mounted. The cable connection structure of the embodiment can have longer service life by using the cable structure, and can achieve lower production cost and higher production efficiency.
In some alternative embodiments, the connector 2 is a USB connector or Lighting connector or micro USB connector or TypeC connector or wireless charging transmitter or power adapter or power plug, etc. Any structure of the connector 2 connected to the end of the cable 1 is applicable to the cable connection structure of the present embodiment.
In summary, in the embodiment of the present invention, the elastic pin 3 is inserted at the end portion of the cable 1 connected to the connector 2, so that the stress at the connection portion of the cable 1 and the connector 2 is released by using the elastic force of the elastic pin 3, thereby replacing the original SR (stress relief) structure manufactured by thermoplastic molding using TPE (thermoplastic elastomer) material. The defects of the original SR structure in the aspects of installation, use, production and manufacturing cost and the like are overcome, the production efficiency and the use quality of the stress release structure are improved, and the production cost is reduced.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cable construction, the cable construction comprising:
a cable (1); and
an elastic needle (3), wherein one end of the elastic needle (3) is inserted into the end part of the cable (1) and fixed;
the cable (1) comprises:
a plurality of wires (11), a plurality of the wires (11) being arranged around a center, a hole (13) being left in the center for the elastic needle (3) to be inserted, the elastic needle (3) being located in the hole (13); and
a sheath (12) wrapping the outer sides of the plurality of wires (11);
the elastic needle (3) comprises:
a head (31) of conical structure, said head (31) being inserted into said cable (1); and
the tail part (32) is of a cylindrical structure, and the tail part (32) is positioned at the device connecting end of the cable (1).
2. The cable construction according to claim 1, wherein,
the tail part (32) is connected with the bottom surface of the head part (31), and the diameter of the tail part is equal to that of the bottom surface of the head part (31).
3. Cable structure according to claim 2, wherein the ratio of the total length of the elastic pin (3) to the length of the tail (32) is greater than or equal to 1.8 and less than or equal to 2.5.
4. Cable structure according to claim 2, wherein the tip of the head (31) is rounded.
5. Cable structure according to claim 4, characterized in that the tip of the head (31) is fixed to the cable (1) by gluing.
6. Cable structure according to claim 1, characterized in that the elastic needle (3) is made of a nickel-titanium alloy material.
7. Cable construction according to claim 2, wherein the elastic needles (3) have equal elastic forces in each radial direction.
8. A cable connection structure, characterized in that the cable connection structure comprises:
the cable construction of any one of claims 1-7; and
the connector (2) is fixedly connected with one end of the cable (1) provided with the elastic needle (3).
9. The cable connection structure according to claim 8, wherein the connector (2) is a USB connector or a Lighting connector.
10. The cable connection according to claim 8, characterized in that the connector (2) is a power plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990688.2A CN113764914B (en) | 2021-08-26 | 2021-08-26 | Cable structure and cable connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990688.2A CN113764914B (en) | 2021-08-26 | 2021-08-26 | Cable structure and cable connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113764914A CN113764914A (en) | 2021-12-07 |
| CN113764914B true CN113764914B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110990688.2A Active CN113764914B (en) | 2021-08-26 | 2021-08-26 | Cable structure and cable connection structure |
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Citations (6)
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|---|---|---|---|---|
| CN205385149U (en) * | 2016-02-16 | 2016-07-13 | 魏海利 | Protective sheath is used to device power joint |
| CN108352699A (en) * | 2015-09-25 | 2018-07-31 | Abb瑞士股份有限公司 | Cable fitting for high-tension cable to be connected to high potential assembly |
| CN207883357U (en) * | 2018-01-05 | 2018-09-18 | 广东珠江电线电缆有限公司 | A kind of house wiring composite cable |
| CN211981098U (en) * | 2020-05-29 | 2020-11-20 | 东莞市溢庆电子应用材料有限公司 | Bending-resistant structure of circuit board flat cable |
| CN212032742U (en) * | 2020-06-18 | 2020-11-27 | 浦大电缆集团有限公司 | High-strength cable |
| CN212847757U (en) * | 2020-08-06 | 2021-03-30 | 深圳市欣盛鸿运科技有限公司 | Bending-resistant shielding wire |
-
2021
- 2021-08-26 CN CN202110990688.2A patent/CN113764914B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108352699A (en) * | 2015-09-25 | 2018-07-31 | Abb瑞士股份有限公司 | Cable fitting for high-tension cable to be connected to high potential assembly |
| CN205385149U (en) * | 2016-02-16 | 2016-07-13 | 魏海利 | Protective sheath is used to device power joint |
| CN207883357U (en) * | 2018-01-05 | 2018-09-18 | 广东珠江电线电缆有限公司 | A kind of house wiring composite cable |
| CN211981098U (en) * | 2020-05-29 | 2020-11-20 | 东莞市溢庆电子应用材料有限公司 | Bending-resistant structure of circuit board flat cable |
| CN212032742U (en) * | 2020-06-18 | 2020-11-27 | 浦大电缆集团有限公司 | High-strength cable |
| CN212847757U (en) * | 2020-08-06 | 2021-03-30 | 深圳市欣盛鸿运科技有限公司 | Bending-resistant shielding wire |
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| Publication number | Publication date |
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| CN113764914A (en) | 2021-12-07 |
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