CN212934908U - Conductive terminal, electric connector and terminal equipment - Google Patents

Abstract

The utility model discloses a conductive terminal, electric connector and terminal equipment, electric connector's conductive terminal includes the contact site, the contact site has a plurality of structural layers, and includes basement, nickel cladding material, rhodium cladding material and the platinum cladding material that sets up from the lining to the outside. The nickel plating layer has good acid resistance, the rhodium plating layer can obstruct the corrosion of the outside to the substrate, and the platinum plating layer has good corrosion resistance, thereby ensuring various performances and durability of the conductive terminal. In addition, the rhodium plating layer is arranged on the inner layer, so that the requirements of strength, wear resistance and the like are not required, the thickness can be properly reduced, the rhodium plating layer can simplify the rhodium electroplating process while the thickness is reduced, and the manufacturing cost is favorably reduced.

Description

Conductive terminal, electric connector and terminal equipment

Technical Field

The utility model relates to a conductive terminal, electric connector and terminal equipment especially relate to a data fast transmission's conductive terminal, electric connector and terminal equipment.

Background

The electric connector plays a role in lifting weight in the existing electronic equipment and has the functions of charging the electronic equipment and transmitting data; however, when water or other substances enter the electronic device, the electronic device may be damaged, and in severe cases, the electronic device may not be used normally. With the change and innovation of science and technology, the existing electronic equipment can achieve a certain waterproof effect, the waterproof property becomes a new trend, and the development of the waterproof electric connector also tends to be standardized. Although the electric connector can be designed into a waterproof structure in the prior art and can prevent the electronic equipment from contacting with the outside, when corrosive media are adhered to the electric connector, the electric connector can corrode the conductive terminals of the electric connector, so that the electric connector generates a condition of function attenuation or failure after being used for a period of time, and the use of the electric connector is influenced.

Therefore, it is necessary to provide a new conductive terminal, an electrical connector and a terminal device to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low-cost conductive terminal, electric connector and terminal equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a conductive terminal comprises a contact part, wherein the contact part is provided with a plurality of structural layers and comprises a substrate, a nickel plating layer, a rhodium plating layer and a platinum plating layer which are arranged from inside to outside.

In a preferred embodiment, the nickel plating layer is a nickel or nickel alloy layer, the rhodium plating layer is a rhodium or rhodium alloy layer, and the platinum plating layer is a platinum or platinum alloy layer.

In a preferred embodiment, the contact portion comprises a first intermediate transition layer comprising at least one metal transition layer, the first intermediate transition layer being located between the nickel plating layer and the rhodium plating layer.

In a preferred embodiment, the metal transition layer comprises a palladium plating layer covering the outside of the nickel plating layer.

In a preferred embodiment, the contact comprises a second intermediate transition layer located between the rhodium plating and the platinum plating.

In a preferred embodiment, the thickness of each of the first intermediate transition layer and the second intermediate transition layer is not less than 2u ".

In a preferred embodiment, the contact portion further comprises a copper plating layer, the copper plating layer being located between the substrate and the nickel plating layer.

In a preferred embodiment, the thickness of the nickel plating layer is 40 to 300u ″.

In a preferred embodiment, the contact portion further includes an outer metal layer covering the outside of the platinum plating layer, and the thickness of the outer metal layer is not less than 2u ″.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an electrical connector, comprising: the shielding shell surrounds the outer side of the insulating body to form a butt joint cavity, and the conductive terminal is provided with a fixing part fixed on the insulating body, a contact part extending forwards from the fixing part and protruding into the butt joint cavity, and a welding part extending backwards out of the insulating body. The contact part of the conductive terminal is the contact part.

In order to achieve the above object, the utility model discloses still adopt following technical scheme: a terminal device comprises the electric connector.

Compared with the prior art, the utility model discloses following beneficial effect has: the contact part is provided with a plurality of structural layers and comprises a substrate, a nickel plating layer, a rhodium plating layer and a platinum plating layer which are arranged from inside to outside. The nickel plating layer has good acid resistance, the rhodium plating layer can prevent the external corrosion to the substrate, and the platinum plating layer has good corrosion resistance, so that various performances and durability of the conductive terminal are ensured; and the cost of the platinum coating is lower, and the corrosion resistance is better. In addition, the rhodium plating layer is arranged on the inner layer, so that the requirements of strength, wear resistance and the like are not required, the thickness can be properly reduced, the rhodium plating layer can simplify the rhodium electroplating process while the thickness is reduced, and the manufacturing cost is favorably reduced.

Drawings

Fig. 1 is a perspective view of the electrical connector of the present invention.

Fig. 2 is a schematic perspective view of another angle of the electrical connector shown in fig. 1.

Fig. 3 is an exploded view of the electrical connector shown in fig. 1.

Fig. 4 is a cross-sectional view of the electrical connector shown in fig. 1 taken along the direction a-a.

Fig. 5 is a cross-sectional view of the electrical connector shown in fig. 1 taken along the direction B-B.

Fig. 6 is a schematic structural view of the contact portion of the conductive terminal in the electrical connector according to the present invention.

Fig. 7 is a schematic structural view of a second embodiment of a contact portion of a conductive terminal according to the present invention.

Fig. 8 is a schematic structural view of a third embodiment of a contact portion of a conductive terminal according to the present invention.

Fig. 9 is a schematic structural view of a fourth embodiment of a contact portion of a conductive terminal according to the present invention.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Likewise, "a pair" and the like do not denote a limitation of quantity, but rather denote the presence of at least one of the pair. "plurality" or "a plurality" means two or more. Unless otherwise indicated, the terms "front," "back," "lower," and/or "upper row" and the like are used for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" and its derivatives, when used in this specification, are intended to specify the presence of stated elements or items, but do not exclude the presence of other elements or items. "connect" and like terms are not limited to physical or mechanical connections and may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, an electrical connector 100 for mounting on a circuit board (not shown) is disclosed. The electrical connector 100 includes an insulative housing 10, a plurality of conductive terminals 20 held on the insulative housing 10, a pair of middle shielding plates 30 held in the insulative housing 10, and a shielding shell 40 covering the insulative housing 10, wherein the shielding shell 40 and the insulative housing 10 enclose a mating cavity 101 for inserting a mating connector (not shown).

Referring to fig. 3, the insulating housing 10 includes a base 11 and a tongue portion 12 extending forward from the base 11. The base 11 is fixed in the shielding shell 40 and has a holding groove 111 at the front end and a fixing groove 112 at the rear end, and the holding groove 111 and the fixing groove 112 are respectively disposed at the front and rear sides of the base 11. The tongue portion 12 includes a flat plate portion 13 at a front end and a stepped portion 14 at a rear end, the stepped portion 14 is formed by extending forward from the base portion 11, and the flat plate portion 13 is formed by extending forward from the stepped portion 14. The two sides of the rear end of the flat plate part 13 are both concavely provided with retaining grooves 131, and the two sides of the front end of the flat plate part 13 are provided with a pair of convex parts 132, and the convex parts 132 are positioned in front of the retaining grooves 131. The thickness of the step portion 14 in both the width direction and the height direction is larger than that of the flat plate portion 13, so as to enhance the strength of the insulating body 10.

Referring to fig. 3 to 5, the conductive terminals 20 are integrally formed in the insulating body 10, and the conductive terminals 20 are arranged in two rows on the upper and lower surfaces of the insulating body 10, and the two rows of conductive terminals 20 are divided into an upper row terminal 21 and a lower row terminal 22. The number of the upper row terminals 21 and the lower row terminals 22 is the same, and the arrangement sequence of the upper row terminals 21 and the lower row terminals 22 from left to right is opposite, so that the electrical connector 100 can realize the function of being plugged into the mating connector 200 in a positive and negative manner. Each of the upper row terminal 21 and the lower row terminal 22 at least includes a pair of ground terminals, a pair of power terminals, a pair of signal terminals, and a detection terminal. The pair of ground terminals of the upper row of terminals 21 and the lower row of terminals 22 are held at both sides of the outermost end of the insulative housing 10. The pair of power terminals, the pair of signal terminals and the detecting terminal are located between the pair of ground terminals, i.e. located at the middle position of the insulating body 10 in the transverse direction.

The upper row of terminals 21 and the lower row of terminals 22 are held in parallel in the up-down direction in the insulative housing 10. Each of the upper row terminal 21 and the lower row terminal 22 includes a holding portion 201 held on the base portion 11, a contact portion 202 extending forward from the holding portion 201 and protruding into the mating cavity 101, a soldering portion 203 extending backward from the holding portion 201 to the base portion 11, and an embedded portion 204 bent forward from the contact portion 202.

The holding portions 201 of the upper and lower rows of terminals 21 and 22 are held in the step portion 14 and the base portion 11. The contact portion 202 of the upper row terminal 21 is exposed to the upper surface of the flat plate portion 13, and the embedded portion 204 of the upper row terminal 21 extends downward and is embedded in the flat plate portion 13 to be fixed with the second tongue plate portion 12. The contact portion 202 of the lower row terminal 22 is exposed to the lower surface of the flat plate portion 13, and the embedded portion 204 of the lower row terminal 22 extends forward and is embedded in the flat plate portion 13 to be held with the tongue plate portion 12. Meanwhile, the soldering portions 203 of the upper and lower rows of terminals 21 and 22 extend rearward out of the base 11 and are arranged in a row.

The pair of middle shield pieces 30 are two symmetrical independent parts and no connecting structure is provided between the middle shield pieces 30. The pair of middle shielding plates 30 are separately disposed at two sides of the insulating body 10, and the pair of middle shielding plates 30 are respectively located between two pairs of ground terminals of the upper row terminal 21 and the lower row terminal 22 in the vertical direction and avoid other conductive terminals except the ground terminals in the width direction. Each of the middle shielding plates 30 includes a fixing portion 31 fixed in the insulating housing 10, an abutting portion 32 extending outward from the fixing portion 31, and a grounding pin 33 extending backward from the fixing portion 31 to the insulating housing 10. The interference portion 32 is formed to extend laterally outward from the fixing portion 31.

The fixing portion 31 of the middle shielding plate 30 is held in the tongue portion 12 and the base portion 11. The interference portion 32 is exposed out of the protrusion 132 and the retaining groove 131. In the using process, the butting connector is clamped in the buckling groove 131 and electrically connected with the abutting portion 32, so as to realize the grounding function. In addition, when the mating connector is mated with the electrical connector 100, the interference portion 32 can protect the protrusion 132 and the latching groove 131 from being scratched by the mating connector, thereby prolonging the service life. Meanwhile, the grounding pin 33 of the middle shielding plate 30 and the soldering portion 203 of the conductive terminal 20 both extend out of the insulating body 10 and are arranged in a row in the transverse direction.

The shielding shell 40 is made of metal material and has a substantially cylindrical structure. The inner wall 41 of the shielding shell 40 and the insulating body 10 enclose to form a docking cavity 101, and the tongue plate portion 12 protrudes into the docking cavity 101. The shielding shell 40 includes a plurality of protrusions 42 protruding from the inner wall 41 into the docking chamber 101 and a backstop 43 at the rear. When the insulative housing 10 is assembled into the mating cavity 101 of the shielding shell 40 from the rear to the front, the rear end surface of the protrusion 42 abuts against the abutting groove 111, thereby preventing the insulative housing 10 from moving forward during use. In addition, the front end surface of the protrusion 42 is protruded forward beyond the front end surface of the base 11, and when an over-pushing phenomenon occurs during the mating process with the mating connector, the mating connector is preferentially pushed against the protrusion 42 to protect the insulation body 10 from being damaged. The rear stop portion 43 of the shielding shell 40 abuts against the retaining groove 112 to prevent the insulating housing 10 from moving backward. The shielding shell 40 further includes a holding pin 44 at least held on a circuit board (not shown), so that the shielding shell 40 has functions of grounding and shielding. Of course, in other embodiments, the shielding case may not be provided, and the shielding function may be implemented by using the housing of the terminal device, for example.

Referring to fig. 6, which is a schematic cross-sectional view of a portion of the contact portion 202 of the conductive terminal 20, the contact portion 202 of the conductive terminal 20 has a plurality of structural layers, and the contact portion 202 includes a substrate a0, a nickel plating layer a1, a rhodium plating layer a2, and a platinum plating layer A3 sequentially disposed from inside to outside. The base a0 of the contact portion 202 is the same as the base of the holding portion 201 and the soldering portion 203, and is made of copper or copper alloy. Optionally, the material of the nickel plating layer a1 is nickel or a nickel alloy, the nickel alloy is a nickel-tungsten alloy or a nickel-phosphorus alloy, and a nickel-tungsten alloy is selected in this embodiment; the rhodium plating layer A2 is made of rhodium or rhodium alloy, and rhodium-ruthenium alloy is selected in the embodiment; the platinum plating layer a3 is made of platinum or a platinum alloy, and the platinum alloy is selected in this embodiment.

The nickel plating layer A1 has good acid resistance, the rhodium plating layer A2 can block the corrosion of the substrate A0 from the outside, and the platinum plating layer A3 has good corrosion resistance; thereby ensuring various performances and durability of the conductive terminal 20, and the cost of the platinum plating layer is lower and the corrosion resistance is better. Meanwhile, since the rhodium plating layer a2 is provided in the inner layer, the rhodium plating layer a2 has no strength, wear resistance, or the like, and thus the thickness can be appropriately reduced, thereby reducing the content of rhodium material. In other words, the thickness of the rhodium plating layer a2 is reduced, so that the requirement for the concentration of the rhodium ruthenium plating solution and the requirement for the plating current are reduced, and the rhodium ruthenium plating solution is prevented from aging and failing due to too high concentration, thereby further reducing the cost of the conductive terminal 20.

The thickness of the nickel plating layer A1 is not less than 40u '("u' is English system unit, is commonly used in electroplating industry, 1 μm is approximately equal to 40u '), and 40-300 u' is selected in the embodiment; the thickness of the rhodium plating layer A2 is not less than 5u ', in the embodiment, 5-60 u' is selected; the thickness of the platinum plating layer A3 is not less than 10u ', 10-60 u' is selected in the embodiment.

The contact 202 further includes a copper plating a4, the copper plating a4 is located between the substrate a0 and the nickel plating a1, and the copper plating a4 is made of copper or a copper alloy, in this embodiment, copper is selected. The copper plating layer A4 is electroplated on the outer side of the substrate A0, which is beneficial to improving the flatness of the substrate surface and reducing the internal stress of the subsequent electroplated layer caused by uneven distribution.

Referring to fig. 7, the second embodiment is different from the first embodiment in that the contact 202 includes a first intermediate transition layer a5, and the first intermediate transition layer includes at least one metal transition layer, and the first intermediate transition layer a5 is located between the nickel plating layer a1 and the rhodium plating layer a 2. In this embodiment, the first intermediate transition layer a5 includes a palladium plating layer covering the nickel plating layer a1 and a metal layer covering the palladium plating layer, and the metal layer includes a gold layer, a rhodium layer, a platinum layer, or the like, and this experiment uses a gold layer, i.e., a palladium alloy is understood as one metal transition layer, and a gold layer, a rhodium layer, and a platinum layer are understood as another metal transition layer or layers, so the metal transition layer may have a one-layer or multi-layer structure. The first intermediate transition layer a5 is used for increasing the bonding force between the nickel plating layer a1 and the rhodium plating layer a2 and reducing the internal stress therein.

The palladium plating layer is made of palladium or palladium alloy, and palladium-nickel alloy is selected in the embodiment; the palladium plating layer has good electric corrosion resistance, good process stability and capability of realizing precise selective electroplating. The gold layer is made of gold or a gold alloy, and has good stability and corrosion resistance, so that the substrate A0 is effectively protected. Meanwhile, the thickness of the first intermediate transition layer A5 is not less than 2u ', and 2-60 u' is selected in this embodiment.

Referring to fig. 8, the third embodiment is different from the second embodiment in that the contact portion 202 includes a second intermediate transition layer a6, the second intermediate transition layer a6 is located between the rhodium plating a2 and the platinum plating A3, and the second intermediate transition layer a6 is used for bonding the rhodium plating a2 and the platinum plating A3 to reduce internal stress therein. Meanwhile, the thickness of the second intermediate transition layer A6 is not less than 2u ', in the embodiment, 5-60 u' is selected, and certainly, the second intermediate transition layer is not only a one-layer structure, and can be provided with multiple layers, so that the thickness of the coating is increased.

As shown in fig. 9, the fourth embodiment is different from the second embodiment in that the contact portion 202 includes an outer metal layer a7, and the outer metal layer a7 covers the outside of the platinum plating A3. The outer metal layer A7 comprises a palladium alloy layer covering the platinum plating layer A3 and a second platinum plating layer covering the palladium alloy layer. The palladium alloy layer is made of silver-palladium alloy and has good electric corrosion resistance; the second platinum plating layer is made of platinum or platinum alloy, and can further prevent the substrate A1 from being corroded by the outside. Meanwhile, the thickness of the outer metal layer A7 is not less than 2u ', and 2-60 u' is selected in this embodiment.

It should be noted that, for each of the above plating layers, the larger the thickness of the plating layer is, the better the parameters of the conductive terminal, such as mechanical properties, electrical properties, chemical properties, etc., but at the same time, rhodium, palladium, and gold in each plating layer are all expensive metals, so that it is necessary to balance the manufacturing cost and performance of the conductive terminal in actual production.

The utility model discloses a contact portion 202 includes basement A0, nickel coating A1, rhodium coating A2 and platinum coating A3 from inside to outside setting. The nickel plating layer A1 has good acid resistance, the rhodium plating layer A2 can obstruct the corrosion of the outside to the substrate, the platinum plating layer A3 has good corrosion resistance, and ensures various performances and durability of the conductive terminal 20, and the platinum plating layer has low cost and better corrosion resistance. In addition, the rhodium plating layer A2 is arranged in the inner layer, so that the requirements of strength, wear resistance and the like are not required, the thickness can be reduced properly, the rhodium plating layer A2 can simplify the rhodium electroplating process, and the manufacturing cost of the electric connector 100 and the terminal equipment is reduced.

Meanwhile, the utility model discloses still relate to a terminal equipment (not shown), for example be cell-phone, panel computer, notebook computer, desktop computer, intelligent wrist-watch, virtual reality equipment etc.. The terminal device includes the above-mentioned electrical connector 100, and certainly also includes structures such as shell, display screen, mainboard, battery, etc., the welding part 203 and the mainboard electric connection of electrical connector 100, contact part 202 is used for connecting the data line in order to charge or data transmission. The cost of the electrical connector 100 is reduced, which is beneficial to reducing the cost of the whole terminal device, and meanwhile, the performance and the service life of the product are not influenced by the reduction of the cost.

In summary, the above is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the content of the specification should still belong to the scope covered by the present invention.

Claims (11)

1. A conductive terminal includes a contact portion; the method is characterized in that: the contact part is provided with a plurality of structural layers and comprises a substrate, a nickel plating layer, a rhodium plating layer and a platinum plating layer which are arranged from inside to outside.

2. An electrically conductive terminal as claimed in claim 1, wherein: the nickel plating layer is a nickel or nickel alloy layer, the rhodium plating layer is rhodium or a rhodium alloy layer, and the platinum plating layer is platinum or a platinum alloy layer.

3. An electrically conductive terminal as claimed in claim 1, wherein: the contact portion comprises a first intermediate transition layer, and the first intermediate transition layer comprises at least one metal transition layer, and the first intermediate transition layer is positioned between the nickel plating layer and the rhodium plating layer.

4. An electrically conductive terminal as claimed in claim 3, wherein: the metal transition layer comprises a palladium plating layer covering the outer side of the nickel plating layer.

5. An electrically conductive terminal as claimed in claim 3, wherein: the contact includes a second intermediate transition layer between the rhodium plating and the platinum plating.

6. An electrically conductive terminal as claimed in claim 5, wherein: the thicknesses of the first intermediate transition layer and the second intermediate transition layer are not less than 2 u'.

7. An electrically conductive terminal as claimed in claim 5, wherein: the contact portion further includes a copper plating layer between the substrate and the nickel plating layer.

8. An electrically conductive terminal as claimed in claim 7, wherein: the thickness of the nickel coating is 40-300 u'.

9. An electrically conductive terminal as claimed in claim 3, wherein: the contact part also comprises an outer metal layer covering the outer side of the platinum plating layer, and the thickness of the outer metal layer is not less than 2 u'.

10. An electrical connector, comprising: the shielding shell surrounds the outer side of the insulating body to form a butt joint cavity, and the conductive terminal is provided with a fixing part fixed on the insulating body, a contact part extending forwards from the fixing part and protruding into the butt joint cavity, and a welding part extending backwards out of the insulating body; the method is characterized in that: the contact portion of the conductive terminal is the contact portion of any one of claims 1 to 9.

11. A terminal device characterized by: the terminal device comprises an electrical connector as claimed in claim 10.

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