CN202454769U - Electrical connector with stranded wire type elastic pin - Google Patents
Electrical connector with stranded wire type elastic pin Download PDFInfo
- Publication number
- CN202454769U CN202454769U CN2012200488308U CN201220048830U CN202454769U CN 202454769 U CN202454769 U CN 202454769U CN 2012200488308 U CN2012200488308 U CN 2012200488308U CN 201220048830 U CN201220048830 U CN 201220048830U CN 202454769 U CN202454769 U CN 202454769U
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- layer
- contact pin
- wire
- elastic contact
- wiry
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Abstract
The utility model relates to an electrical connector with a stranded wire type elastic pin. In the stranded wire type elastic pin, at least two metal wires are arranged on a center layer; the cross section of each of metal wires on each layer is enveloped to be circular, and the metal wires between the adjacent layers are tightly attached; the stranding directions of the metal wires on at least one layer are opposite to those of the metal wires on the other layers, and the stranding directions of the metal wires on the outermost layer are opposite to those of the metal wires on the adjacent layer; a helical angle of each metal wire on the outer layer is small than that of each metal wire on the inner layer; the length of the stranded wire type elastic pin is larger than or is equal to the helical pitch of each metal wire on the outermost layer; the external diameter D of a maximum fat point is 1.3-1.9 times of the external diameter d of the pin; and the span L of the fat point is 2.2-3.8 times of the external diameter d of the pin. According to the electrical connector, the stranded wire type elastic pin has small meshing force, so that a multi-core connector is very easily inserted or separated artificially; and the stranded wire type elastic pin can be used in the multi-core connector.
Description
Technical field
The utility model relates to the electric connector with stranded elastic contact pin, relates to especially that a kind of reliability is high, contact engaging and separating force is little, plug is convenient, the electric connector of long service life.
Background technology
For electric connector with stranded elastic contact pin, need between the two ends of stranded elastic contact pin, carry out towards fat, form the fat point of " bulge shape ", the strain through fat point matches with the jack of rigidity, thus the contact of formation electric connector is right.
U.S. Pat 3; 31; 9217 disclose a kind of stranded elastic contact pin (see figure 1), and it increases second layer metal silk 87 on the basis of core metal silk 88, and outer layer metal silk 86 is opposite with second layer metal silk 87 hands of spiral; The two ends of outer layer metal silk 86, second layer metal silk 87 and core metal silk 88 weld together respectively, to form the solder joint of two protrusions.As shown in Figure 1; When the jack with rigidity plugs together; This unique core metal silk just only produces the pressure or the pulling force of axis, thereby the contraction of " bulge shape ", the strain of expansion have all been played undesirable effect of contraction, therefore; The engaging force of plug is very big, can not in a lot of connector of core number, use.
U.S. Pat 4; 358; 180 disclose a kind of stranded elastic contact pin (see figure 2), on traditional two-layer stranded elastic contact pin, improve, as shown in Figure 2; It comprises the inner current-carrying part 16 that is formed by three copper free wires 18 (soft copper) strand system, with the outside current-carrying part that is surrounded by one group of identical wire 22,24 spiral of diameter.25～70% of outside 7 one metal wires are shaped by beallon, and remaining external metallization silk is shaped to reduce engaging force (being equivalent to the power that connector pin and jack plug together needs), the separating force of maintenance minimum by oxygen-free copper.U.S. Pat 4,358,180 only are made up of the double layer of metal silk, make the effort that reduces contact engaging and separating force be restricted equally.
The applicant's CN101546879A has proposed a kind of twist needle light in inserting/pulling force, and it is made up of two-layer above metal alloy wires, more specifically; When having proposed said twist needle light in inserting/pulling force and adopting three-layer metal alloy silk to constitute, the reverse each other strand system of the second layer and ground floor, the 3rd layer is in reverse to second layer strand again and makes; After strand system is accomplished, form through overshoot is fat, ground floor adopts three metal alloy wires; The second layer adopts ten metal alloy wires, and the 3rd layer is adopted ten six roots of sensation metal alloy wires.
Yet; The applicant finds; To really make significantly the diminishing of contact engaging and separating force; Also need further essential features, for example, the diameter, pin that also need confirm overall diameter, total cross-sectional area, each layer radical, silk footpath, pitch, closely connected requirement, maximum fat point directly, fat some span, helical angle wiry or the like.
Those skilled in the art will readily understand that these parameters have tangible constraint each other, promptly any one parameter all can not be selected arbitrarily independently, can't obtain enforceable technical scheme through the routine test of limited number of times.
And just still press on the market and expect that reliability is high, contact engaging and separating force is little, plug is convenient, the connector of long service life.
The utility model content
The purpose of the utility model provides a kind of electric connector with stranded elastic contact pin, and its stranded elastic contact pin engaging force is little, makes manual work plug together or separate the multicore count connector to become very easy, can be used for the connector of multicore number.
For this reason; The utility model provides a kind of electric connector with stranded elastic contact pin, it is characterized in that, said stranded elastic contact pin comprises double layer of metal silk at least; The wire of central core has two one metal wires at least; More outer field wire envelope is than the wire of internal layer, and the cross section that the wire of each layer difference envelope becomes is rounded, fits tightly between the wire of adjacent layer; The length of stranded elastic contact pin is more than or equal to the screw pitch of outermost metal silk; The external diameter of maximum fat point or external diameter that diameter D is contact pin or 1.3～1.9 times of diameter d; External diameter that fat some span L is contact pin or 2.2～3.8 times of diameter d.
Preferably, the strand system wiry of one deck strand system direction wiry and other layers is in the opposite direction at least, and the strand system wiry of outermost strand system direction wiry and adjacent layer is in the opposite direction; More outer field helical angle wiry is less than the helical angle wiry than internal layer.
Preferably, central core strand system helical angle wiry is 80～84 °, and the strand system helical angle of second layer metal silk is 73～77 °, and the strand system helical angle of three-layer metal silk is 65～69 °.
Preferably, the diameter wiry of each layer equates respectively, or the diameter wiry of each layer all equates.
Preferably, the tolerance of the diameter wiry of each layer is this layer wire nominal silk footpath ± 20%
Preferably; Each layer wire nominal diameter satisfies: 0.9d1≤d2≤1.1d1, and 0.9d1≤d3≤1.1d1, wherein d1 is the nominal diameter of each one metal wire of ground floor; D2 is the nominal diameter of each one metal wire of the second layer, and d3 is the nominal diameter of the 3rd layer of each one metal wire.
Preferably, the ground floor wire is provided with 2～4, and the second layer metal silk is provided with 8～12, and the three-layer metal silk is provided with 12～18.
Preferably, the ground floor wire is provided with 3, and the second layer metal silk is provided with 10, and the three-layer metal silk is provided with 15.
Preferably, D=1.6d, L=3d.
Preferably, each layer wire is copper free wire or beryllium-bronze silk.
In the prior art, increasing the stranded elastic contact pin number of plies wiry and radical, is for stranded elastic contact pin is increased slightly, so that contact pin can pass through bigger rated current.
On the contrary; According to the utility model; Under the constant situation of said stranded elastic contact pin diameter, traditional two-layer stranded elastic contact pin is improved to three layers or multilayer more, increase the radical of outer layer metal silk simultaneously; And reduce all diameters wiry, with the cross-sectional area that obtains the littler stranded elastic contact pin of engaging force and increase conduction current.
According to the utility model, the engaging force of said contact pin can descend significantly, can be used in the more connector of core number, to reduce the contact engaging and separating force of connector;
According to the utility model, during the plugging together of said contact pin,, can improve effective contact area that contact pin and jack are electrically connected, the electric reliability of raising electric connector because the skin of contact pin has more contact point with the rigidity jack;
According to the utility model, to compare with traditional two-layer stranded elastic contact pin, the connect-disconnect life of said contact pin can be brought up to more than 50,000 times even 100,000 times from 500 times of industry standard regulation.
According to the utility model; With traditional internal layer only three layers of stranded elastic contact pin of one compare; The engaging force of the stranded elastic contact pin of the utility model or separating force descend more than 40%, and the connect-disconnect life of said contact pin can be brought up to more than 50,000 times from 500 times of industry standard regulation equally.
Description of drawings
Fig. 1 is the structural representation according to the stranded elastic contact pin of a prior art;
Fig. 2 is the structural representation according to the stranded elastic contact pin of another prior art;
Fig. 3 is according to the structure of the stranded elastic contact pin of the utility model and parameter sketch map;
Fig. 4 is along the cross section cutaway view Amplified image of A-A line in Fig. 3.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is done further to specify:
Shown in Fig. 3-4, have ground floor wire 1, second layer metal silk 2, three-layer metal silk 3 according to the stranded elastic contact pin structure of the utility model.Second layer metal silk 2 envelope ground floor wires 1, the three-layer metal silk 3 envelope second layer metal silks 2, envelope is circular respectively for each layer wire, fits tightly between adjacent layer, and adjacent double layer of metal skein silk system is in the opposite direction; The ground floor wire forms by 82 ° ± 2 ° spiral strands of helical angle system, and the second layer metal silk forms by 75 ° ± 2 ° spiral strands of helical angle system, and the three-layer metal silk forms by 67 ° ± 2 ° spiral strands of helical angle system; The wire diameter of each layer equates respectively, i.e. all wire 1 equal diameters of ground floor, all wire 2 equal diameters of the second layer, all wire 3 equal diameters of the 3rd layer.
According to the utility model, the generation type of stranded elastic contact pin is following: be twisted into a sufficiently long synthetic silk by wire 1,2,3 spirals, cut into the length that needs again; Then; The end of described wire 1,2,3 is fixed through laser spot welding, and last privileged site between two ends carries out towards fat, forms fat point; Be used for the rigidity jack in wall elasticity contact, thereby realize being electrically connected.
Will in industry, obtain to use, one of difficult point is choosing of stranded elastic contact pin parameter.
According to the utility model, the related parameter of stranded elastic contact pin is as shown in Figure 3, and M is the length of stranded elastic contact pin; The D contact pin is the fat degree of fat point, is the diameter of maximum fat some B; D is the diameter of contact pin, is called for short the pin footpath; L is the span of fat point, is the fat some distance between two ends; α is by being twisted system helical angle wiry, and P is the point that mark helical angle wiry is got.
According to the stranded elastic contact pin of the utility model, in one embodiment, each layer strand system direction wiry is identical, promptly is all left-handed or dextrorotation; In one embodiment, adjacent double layer of metal skein silk system is in the opposite direction; In other embodiment, adjacent double layer of metal skein silk system direction can be identical, but one metal wire layer strand system direction is opposite with other layers at least; Therein among embodiment, the winding direction of three-layer metal silk 3 and second layer metal silk 2, ground floor winding direction wiry are opposite.
In one embodiment, the diameter wiry of each layer equates respectively, i.e. the equal diameters of all wires 1 of ground floor, the equal diameters of all wires 2 of the second layer, the equal diameters of all wires 3 of the 3rd layer.
In one embodiment, the diameter wiry of each layer allows certain tolerance, tolerance be this layer wire nominal silk footpath ± 20%.
In one embodiment; The nominal diameter of setting each one metal wire of ground floor is d1, and the nominal diameter of each one metal wire of the second layer is d2, and the nominal diameter of the 3rd layer of each one metal wire is d3; Each layer wire nominal diameter preferably satisfies: 0.9d1≤d2≤1.1d1,0.9d1≤d3≤1.1d1.
In other embodiment, the wire of each layer all equates, promptly the diameter of all wires 2 of the diameter of all wires 1 of ground floor, the second layer, the 3rd layer the diameter of all wires 3 all equate.
In one embodiment, adopt the combination of following technical characterictic: m=3, n=10, p=15, α
1=82 °, α
2=75 °, α
3=67 °.In another embodiment, adopt the combination of following technical characterictic: m=3, n=10, p=16, α
1=82 °, α
2=75 °, α
3=67 °.
In one embodiment, fat degree D is chosen for 1.3～1.9 times of pin footpath d, and span L is chosen for 2.2～3.8 times of pin footpath d, preferably, and D=1.6d, L=3d.
The length M of stranded elastic contact pin is relevant with the screw pitch of three-layer metal silk 3.If M less than 1/2nd of screw pitch, in the manufacture process of contact pin, the phenomenon of filoselle occurs easily, just after synthetic silk was cut off operation, the outer layer metal silk can not be fixed.Best choice is that M is more than or equal to the screw pitch of three-layer metal silk 3.
The wire material of stranded elastic contact pin can be selected oxygen-free copper (soft copper) silk, beryllium-bronze silk or tin bronze wire for use, preferred copper free wire or beryllium-bronze silk.
With traditional internal layer be 3 beryllium-bronze wires; And skin is that 7 beryllium-bronze wire stranded elastic contact pins are compared; Under all identical situation of pin footpath d, fat degree D, span L, wire material, surface roughness wiry, surface treatment, heat treatment, test sleeve; The engaging force of the stranded elastic contact pin of the utility model or separating force descend more than 40%, and connect-disconnect life can be brought up to more than 50,000 times even 100,000 times, and still keep the electric reliability of traditional stranded elastic contact pin; Can use in the more connector of core number, to reduce the contact engaging and separating force of connector.
Comparative example and test case
With described stranded elastic contact pin and the traditional internal layer of pin footpath d for
is that 3 beryllium-bronze wires and skin are that 7 beryllium-bronze wire stranded elastic contact pins are applied to respectively in the connector of 100 cores; And carried out verification experimental verification; Under the identical situation of all conditions such as test sleeve, the testing result of connector engaging force, connector separating force, contact separating force (being said contact pin separating force), connect-disconnect life number of times is as shown in table 1:
Table 1 adopts the connector and the connector verification experimental verification data contrast table that adopts traditional contact pin of the said contact pin of the utility model
Annotate: connector life-span 500 times of adopting traditional contact pin the data that reach by GJB2446-95 " shell is located microminiature rectangular electric connector general specification " of requirement.
Claims (10)
1. electric connector with stranded elastic contact pin is characterized in that:
Said stranded elastic contact pin comprises double layer of metal silk at least; The wire of central core has two one metal wires at least; More outer field wire envelope is than the wire of internal layer, and the cross section that the wire of each layer difference envelope becomes is rounded, fits tightly between the wire of adjacent layer;
The length of stranded elastic contact pin is more than or equal to the screw pitch of outermost metal silk;
The D outer diameter of the maximum fat point of stranded elastic contact pin is 1.3～1.9 times of outside diameter d of contact pin; 2.2～3.8 times of the outside diameter d that fat some span L is contact pin.
2. electric connector as claimed in claim 1; It is characterized in that: said stranded elastic contact pin; At least the strand system wiry of one deck strand system direction wiry and other layers is in the opposite direction, and the strand system wiry of outermost strand system direction wiry and adjacent layer is in the opposite direction; More outer field helical angle wiry is less than the helical angle wiry than internal layer.
3. electric connector as claimed in claim 1; It is characterized in that: said stranded elastic contact pin; Central core strand system helical angle wiry is 80 °～84 °, and the strand system helical angle of second layer metal silk is 73 °～77 °, and the strand system helical angle of three-layer metal silk is 65 °～69 °.
4. electric connector as claimed in claim 1 is characterized in that: said stranded elastic contact pin, the diameter wiry of each layer equate respectively, or the diameter wiry of each layer all equates.
5. electric connector as claimed in claim 1 is characterized in that: the tolerance of the diameter wiry of said each layer of stranded elastic contact pin for this layer wire nominal silk footpath ± 20%.
6. electric connector as claimed in claim 1; It is characterized in that: said each layer of stranded elastic contact pin wire nominal diameter satisfies: 0.9d1≤d2≤1.1d1; 0.9d1≤d3≤1.1d1; Wherein d1 is the nominal diameter of each one metal wire of ground floor, and d2 is the nominal diameter of each one metal wire of the second layer, and d3 is the nominal diameter of the 3rd layer of each one metal wire.
7. electric connector as claimed in claim 1 is characterized in that: said stranded elastic contact pin, ground floor wire are provided with 2～4, and the second layer metal silk is provided with 8～12, and the three-layer metal silk is provided with 12～18.
8. electric connector as claimed in claim 7 is characterized in that: said stranded elastic contact pin, ground floor wire are provided with 3, and the second layer metal silk is provided with 10, and the three-layer metal silk is provided with 15.
9. electric connector as claimed in claim 1 is characterized in that: said stranded elastic contact pin, D=1.6d, L=3d.
10. electric connector as claimed in claim 1 is characterized in that: said stranded elastic contact pin, each layer wire are copper free wire or beryllium-bronze silk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200488308U CN202454769U (en) | 2012-02-15 | 2012-02-15 | Electrical connector with stranded wire type elastic pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200488308U CN202454769U (en) | 2012-02-15 | 2012-02-15 | Electrical connector with stranded wire type elastic pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202454769U true CN202454769U (en) | 2012-09-26 |
Family
ID=46870599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200488308U Withdrawn - After Issue CN202454769U (en) | 2012-02-15 | 2012-02-15 | Electrical connector with stranded wire type elastic pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202454769U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570118A (en) * | 2012-02-15 | 2012-07-11 | 贵州航天电器股份有限公司 | Electric connector with wire-stranding elastic contact pin |
| CN106848684A (en) * | 2016-12-21 | 2017-06-13 | 苏州华旃航天电器有限公司 | A kind of electric contact piece with elastic double helix Wound-rotor type contact element |
-
2012
- 2012-02-15 CN CN2012200488308U patent/CN202454769U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570118A (en) * | 2012-02-15 | 2012-07-11 | 贵州航天电器股份有限公司 | Electric connector with wire-stranding elastic contact pin |
| CN102570118B (en) * | 2012-02-15 | 2014-09-17 | 贵州航天电器股份有限公司 | Electric connector with wire-stranding elastic contact pin |
| CN106848684A (en) * | 2016-12-21 | 2017-06-13 | 苏州华旃航天电器有限公司 | A kind of electric contact piece with elastic double helix Wound-rotor type contact element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120926 Effective date of abandoning: 20140917 |
|
| RGAV | Abandon patent right to avoid regrant |