CN102446635A - Electric switch with improved switch contact - Google Patents
Electric switch with improved switch contact Download PDFInfo
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- CN102446635A CN102446635A CN2011102997181A CN201110299718A CN102446635A CN 102446635 A CN102446635 A CN 102446635A CN 2011102997181 A CN2011102997181 A CN 2011102997181A CN 201110299718 A CN201110299718 A CN 201110299718A CN 102446635 A CN102446635 A CN 102446635A
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Abstract
The present invention relates to an electric switch which comprises a set of terminals. Each terminal is provided with the following components: at least one contactor device, an opening for accommodating an electric conductor, and a screw thread device for screwing the electric conductor to tight. A movement component with at least two contactor devices is configured, wherein one contactor device pivotablly and permanently contacts with the contactor device of the terminal, and other contactor device of the movement component movably contact with the contactor device of the terminal. A driving device slidably contact with at least one part of the movable component for driving the movement component to move from a first switch position to a second switch position. The terminal and each contactor device of the movement component comprise composite material of an inner core part. A central shaft has high ceramic TSC proportion and low Ag proportion. When the movement component moves to the periphery of the inner core part relatively to the central shaft, along with reduction of ceramic TSC proportion, percentage of Ag increases gradually. The contactor device of the electric switch has better abrasion resistance and higher impact strength. Furthermore the electric switch has the following advantages: prolonged service life and improved contactor quality.
Description
Technical field
The present invention relates generally to the electric switch that is used for circuit.The present invention is specifically related to a kind of electric switch with improved switch contact.
Background technology
Usually, electric switch like single channel or two-way switch, is used for through between electric wire, being electrically connected control circuit and to circuit supply.Dissimilar contactors is based on the Combination Design of electric component with machinery and electric component.Operate this switch to open or closed electrical connection through circuit, it can selectively open or closed circuit the user through opening or closed this switch.
Electric switch is provided with fixed terminal, and the contact of fixed terminal electrically contacts through the contact of transfer arm each other, and it is through simple hinge mechanism operation.In electric switch, contact needs stand to surpass 10,000 circulations, and therefore carries out the accelerated aging test.Because fixing, the mobile and/or pivot contact of electric switch is more being operated under top load and the temperature, therefore in course of normal operation, these contacts of switch are easy to wearing and tearing or corrosion, even when overheated the appearance, the further degeneration.The wearing and tearing of this electrical contact and overheated cause the switching manipulation of losing efficacy or degenerating, the inefficacy of other switch block or fault and minimize whole life-span of switch.Because various conditions overheated wearing and tearing that cause or degeneration can occur in the switching manipulation process; The electric weight that these various conditions such as contact carry, the voltage that applies in the contact both sides, and the maximum operating temp of contact experience; Together with the operated working strength of contact, the i.e. quantity of switching manipulation and frequency.
In addition, the wearing and tearing of electrical contact are the most normally owing to be connected to fixed terminal or the starting the arc of generation causes when fixed terminal breaks off at the contact of transfer arm in the switching manipulation process.It also can be because the pollution of the contact surface of the contact of fixed terminal causes.Further, the excessive heat of contact or other switch block causes that the physical characteristic of the contact of terminal changes.When its contact was corroded and damages, the effect of switch possibly lost efficacy, and it causes the risk that people or machine are damaged.
The contact design of switch is to stand to occur in this starting the arc, corrosion and the excessive heat of switch the inside.In the life-span of switch, though various conventional method utilize specific contact material as the contact of switch to stand the wearing and tearing of fixing and mobile contact under sizable impact.In some conventional switch, brass material or other composite material are formed and form electrical contact as switch with the property led of offeing telex, better impact strength and wear-resistant.
About traditional electric switch, it is difficult in the whole life-span of switch to keep the contact quality of electrical contact, when it bears because the higher Mechanical Contact power of the starting the arc and temperature during with wearing and tearing the circuit that it has destroyed switch and has been attached thereto.Further, it also can cause in the conductivity transmission loss and to the risk of people injury.In addition, it requires often to monitor and change the contact of whole switch or switch.Therefore, need provide a kind of its can overcome the electric switch with improved switch contact of above-mentioned defective.
Summary of the invention
Target of the present invention provides a kind of electric switch with improved switch contact, and it helps better wear-resistant and impact strength to improve the life-span of electric switch, has also improved the contact quality of electric switch.
Another target of the present invention provides a kind of electric switch with improved switch contact, and it can obtain higher pyroconductivity and conductivity.
According to an aspect, realize the electric switch that the present invention relates to of this target, comprise one group of terminal, each terminal is furnished with at least one contact apparatus, is used to receive the opening and the screw device that is used to tighten electric conductor of electric conductor.Moving meter is furnished with at least two contact apparatus, and one of them contact apparatus is to contact with the contact apparatus of one of them terminal pivotly and for good and all, and other contact apparatus of moving meter contacts with the contact apparatus of other terminal movably.At least a portion sliding contact of drive unit and moving meter with drive moving meter from first position of the switch to the second switch position.Each contact apparatus of terminal and moving meter comprises the inner core of composite material; Its central shaft at it has high ceramic TSC (titanium silicon carbide) ratio and low Ag (silver) ratio; Wherein when with respect to central shaft when the periphery of inner core moves; Along with the minimizing of the percentage of ceramic TSC, increase gradually at the percentage of the silver of the central shaft of inner core.
In addition; The composite material of the said inner core of each contact apparatus preferably it central shaft by 20% silver qualitatively and qualitatively 80% ceramic TSC form, and it with respect to the periphery of the central shaft of inner core by 80% silver qualitatively and qualitatively 20% ceramic TSC form.The composite material of the inner core of each contact apparatus comprises structure gradient (grading) and the high Ag and the electricity of low ceramic TSC and the mixture of thermal gradient of high ceramic TSC and low Ag.The composite material of the inner core of each contact apparatus is coated with the external coating that is formed by high Ag and low ceramic TSC composite material.External coating preferably by 90% silver qualitatively and qualitatively 10% ceramic TSC composite material form.
In addition, in first position of the switch, only moving meter contact apparatus contact apparatus of being electrically connected to one of them terminal is supplied with to break off to the electricity of circuit.In the second switch position, the contact apparatus of all moving meters is electrically connected to the contact apparatus of each terminal to supply with to circuit.The contact apparatus of moving meter comprises mobile contact seat and mobile contact terminal (tip).The contact apparatus of terminal comprises Pivot joint and fixed contact end.Drive unit is placed in the outer rocking bar (rocker) and is mounted with elastic device to exert pressure on moving meter.This group terminal and moving meter are closed in the shell with base cover.This group terminal and moving meter are formed by electric conduction material.
Description of drawings
The present invention will discuss with reference to accompanying drawing more specifically.
Fig. 1 shows the internal structure that is in the OFF state according to the electric switch of one exemplary embodiment of the present invention;
Fig. 2 shows the internal structure that is in the ON state according to the electric switch of one exemplary embodiment of the present invention;
Fig. 3 shows the detail drawing according to the switch contact of the description electric switch of one exemplary embodiment of the present invention;
Fig. 4 shows the explanatory view according to the composite material of the switch contact of the electric switch of one exemplary embodiment of the present invention;
Fig. 5 shows the sequential flowchart according to the method for the composite material of the switch contact of the description formation electric switch of one exemplary embodiment of the present invention.
Embodiment
The present invention will be after this with reference to description of drawings.
Fig. 1 shows according to the electric switch of one exemplary embodiment of the present invention internal structure at its OFF state.The present invention relates to electric switch, it can use at different rated values, and different circuit (the 1-utmost point, the 2-utmost point) etc. are used for control circuit and supply with to circuit.Electric switch comprises outer rocking bar 1, and it is configured as being used for the aesthstic lid of electric switch.Outer rocking bar 1 also can be known as central plate.Outer rocking bar 1 is designed to keep plunger or driver 3 at its center.Plunger 3 is mounted with plunger spring 2, and it is exerted pressure on plunger 3.Electric switch has and has the base cover that is connected to outer rocking bar 1 or the shell 4 of contacts cover 5, makes to form enclosed construction to seal one group of fixed terminal 6 and mobile contact arm 7.Shell 4 also is known as base seat (base socket).
With reference to Fig. 3, explained according to one exemplary embodiment of the present invention and described switch contact 6a1,6b1, the 7a of electric switch, the detail drawing of 7b.Mobile contact arm 7 is configured as having mobile contact seat 7a and the terminal 7b of mobile contact.The first fixed terminal 6a is furnished with and is used to admit input conductor 12, that is, and and the opening 9 of the electric wire of live; And the supporting terminal support 8 that is used to support the pivot contact joint 6a1 of the first fixed terminal 6a.Similarly, the second fixed terminal 6b is furnished with and is used to receive output conductor 12, that is, and and the opening 10 of equipment conductor (appliance conductor); And the terminal 6b1 of fixed contact.The switch contact of electric switch comprises mobile contact seat 7a, mobile contact terminal 7b, Pivot joint 6a1 and fixed contact joint 6b1.Fixed terminal 6a, 6b are made up of terminal screw 11, and it is used to tighten and fixed conductor 12 after suitable conductor 12 is inserted into fixed terminal opening 9,10.The Pivot joint 6a1 of the mobile contact seat 7a of transfer arm 7 and the first fixed terminal 6a electrically contacts with permanent mode; And the contactor end 6b1 of the terminal 7b of the mobile contact of transfer arm 7 and the second fixed terminal 6b only electrically contacts when on-state.
The outer rocking bar 1 of electric switch can be operated through simple hinge mechanism gets into two position of the switch, like open position and on-position.At open position, plunger 3 is actuated to guide mobile contact arm 7 leaning against on the base cover 5, and this has broken off electrically contacting between the terminal 6b1 of fixed contact of the terminal 7b of mobile contact and the second fixed terminal 6b of transfer arm 7.Therefore, at open position, electric switch is opened or is disconnected to the electricity of the circuit that is connected to it and supplies with.Similarly, at on-position, plunger 3 is set up between sliding with the terminal 6b1 of fixed contact at the terminal 7b of the mobile contact of transfer arm 7 and the second fixed terminal 6b on the mobile contact arm 7 and is electrically contacted.Therefore, at on-position, electric switch is closed perhaps to be supplied with to the circuit that is connected to it.
Fig. 4 has explained the sketch map of the composite material of switch contact 6a1 according to the electric switch of exemplary embodiment of the present invention, 6b1,7a, 7b.Switch contact, like the mobile contact seat 7a of electric switch, the terminal 7b of mobile contact, the terminal 6b1 of Pivot joint 6a1 and fixed contact is formed by inner core 100, and it is coated with external coating 101.The inner core 100 of contact 6a1,6b1,7a, 7b and external coating 101 are made up of the sinter powder metal composite material of conduction; Comprise silver particles (Ag) and ceramic TSC (titanium silicon carbide), it is defined as FGM (functionally graded material).Each contact 6a1,6b1,7a, 7b comprise the composite material of inner core; Its central shaft at it has high ceramic TSC (titanium silicon carbide part) ratio and low Ag (silver) ratio, is wherein increasing gradually with respect to central shaft reduction along with the percentage of ceramic TSC when the periphery of inner core moves at the percentage of the central shaft Ag of inner core.The composite material of the inner core of each contact apparatus comprises structure gradient and the high Ag and the electricity of low ceramic TSC and the mixture of thermal gradient of high ceramic TSC and low Ag.
On the one hand, the inner core 100 of contact 7a, 7b, 6a1,6b1 is formed by the composite material of ceramic TSC of height and low Ag, 20% silver and 80% ceramic SC qualitatively on the preferred mass.On the other hand, the inner core 100 of contact 7a, 7b, 6a1,6b1 is at its central shaft, formed 20% silver and 80% ceramic TSC qualitatively on the preferred mass by the composite material of ceramic TSC of height and low Ag; And at its periphery about central shaft, the mixture of Gao Yin and low ceramic TSC, 80% silver and 20% ceramic TSC qualitatively on the preferred mass.When moving about the periphery of central shaft towards inner core 100, in the composite material of the central shaft of inner core 100 percentage of Ag with respect to composite material in the percentage of ceramic TSC increase gradually.Similarly, when moving about the periphery of central shaft towards inner core 100, in the composite material of the central shaft of inner core 100 percentage of ceramic TSC with respect to composite material in the percentage of Ag reduce gradually.The composite material of high ceramic TSC and low Ag is with reference to making the structure gradient composite material, and the composite material of high Ag and low ceramic TSC is with reference to making electricity and thermal gradient composite material.
In addition; The composite material of the inner core of each contact apparatus 6a1,6b1,7a, 7b is coated to have an external coating 101 that is formed by high Ag and low ceramic TSC composite material, wherein external coating 101 preferred by 90% silver qualitatively and qualitatively the composite material of 10% ceramic TSC form.The composite material of contact 6a1,6b1,7a, 7b makes the path of electric current through minimum resistance, and promptly the periphery of contact owing to it comprises high Ag, and is implemented in the stress/pressure distribution of the central axis of contact, because it comprises high ceramic TSC.Therefore; By means of ceramic TSC; Switch contact 6a1,6b1,7a, 7b obtain that high abrasion to this electrical applications decreases and the impact strength material with the quality and life-span of maintained switch contact, and realize good electrical conductivity and electronics flowability by means of silver particles.Therefore, this switch contact has increased the life-span of electric switch and has also improved the contact quality of electric switch.
Fig. 5 shows the flow chart of method of the composite material of the switch contact 6a1 that described according to the formation electric switch of exemplary embodiment of the present invention, 6b1,7a, 7b.Beginning, titanium silicon carbide (TSC) powder mixes with the cermet adhesive.Then, the composite powder that ceramic TSC and silver particles (Ag) powder needs with formation, that is, and the ideal mixture of Ag and ceramic TSC.Thereafter, composite powder is sintered and is machined as the shape that needs, like sphere, and oval or any other shape.At last, the composite material of shaping can be brazed in the brass terminal, and like fixed terminal 6a, 6b and mobile contact arm 7, the composite material that wherein is shaped is as contact portion or device.
And have 15.6 * 10 traditionally
6The brass material (CuZnX) of good conductivity compare, this composite material material has higher heat conductivity, good electrical conductivity, higher impact strength and very high wear-resistant.The material behavior of composite material of the present invention is tabulated as follows with respect to traditional material (CuZnX):
Based on this table, the heat of the composite material that obtains and conductivity be near traditional material CuZnX, and the composite material that wherein obtains is through increasing the composition of its Ag wherein, its hot and conductivity even can approach fine copper.Proved also that in using the 20A switch of CuZn15 the thermal characteristics of composite material pivot contact joint with TSC of Ag has shown 37.2 degrees centigrade whole temperature rise.Therefore, this composite material material well is adapted to be used for the temperature rising standard of this kind electronic product.
Foregoing description is a specific embodiment of the present invention.Should think that present embodiment has been merely illustrative purposes and has set forth.To those skilled in the art is significantly, though the present invention explains that according to its specific embodiment it exists multiple alternative form of the present invention, improvement and variation at this.Intention is to comprise all these improvements and changes, as long as they get in the spirit and scope of the present invention like claim or its equivalent.Therefore, all changes, improvement and the alternative form of wide protection range that falls into accompanying claims is under main idea of the present invention.
Claims (12)
1. electric switch comprises:
A plurality of terminals, each said terminal is furnished with at least one contact apparatus, is used to hold the opening and the screw device that is used to tighten said electric conductor of electric conductor;
Be furnished with the moving meter of at least two contact apparatus; One of them said contact apparatus is to contact with the said contact apparatus of one of them said terminal pivotly and for good and all, and another contact apparatus of said moving meter contacts with the said contact apparatus of other said terminal movably; And
Drive unit, at least a portion sliding contact of said drive unit and said moving meter with drive said moving meter from first position of the switch to the second switch position;
It is characterized in that: each contact apparatus of said terminal and said moving meter comprises the composite material of inner core; Said inner core has high ceramic TSC (titanium silicon carbide) ratio and low Ag (silver) ratio at its central shaft; When about central shaft when the periphery of inner core moves; Along with the minimizing of the percentage of ceramic TSC, increase gradually at the percentage of the silver of the central axis of inner core.
2. electric switch as claimed in claim 1; It is characterized in that: the composite material of the said inner core of each contact apparatus preferably it central shaft by 20% silver qualitatively and qualitatively 80% ceramic TSC form; In its perimeter with respect to the central shaft of inner core, by 80% silver qualitatively and qualitatively 20% ceramic TSC form.
3. electric switch as claimed in claim 1 is characterized in that: the composite material of the inner core of said each contact apparatus comprises structure gradient and the high Ag and the electricity of low ceramic TSC and the mixture of thermal gradient of high ceramic TSC and low Ag.
4. electric switch as claimed in claim 1 is characterized in that: the composite material of the inner core of said each contact apparatus is coated with the external coating that is formed by high Ag and low ceramic TSC composite material.
5. electric switch as claimed in claim 4 is characterized in that: said external coating by 90% silver qualitatively and qualitatively 10% ceramic TSC composite material form.
6. electric switch as claimed in claim 1 is characterized in that: in said first position of the switch, only said moving meter contact apparatus is electrically connected to the said contact apparatus of one of them said terminal, supplies with to break off to the electricity of circuit.
7. electric switch as claimed in claim 1 is characterized in that: in said second switch position, the said contact apparatus of all said moving meters is electrically connected to the said contact apparatus of each said terminal, to supply with to said circuit.
8. electric switch as claimed in claim 1 is characterized in that: the said contact apparatus of said moving meter comprises mobile contact seat and mobile contact end.
9. electric switch as claimed in claim 1 is characterized in that: the said contact apparatus of said a plurality of terminals comprises Pivot joint and fixed contact end.
10. electric switch as claimed in claim 1 is characterized in that: said drive unit is placed in the outer rocking bar and is mounted with elastic device, to exert pressure on said moving meter.
11. electric switch as claimed in claim 1 is characterized in that: said a plurality of terminals and said moving meter are closed in the shell with base cover.
12. electric switch as claimed in claim 1 is characterized in that: said a plurality of terminals and said moving meter are formed by electric conduction material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN2904/CHE/2010 | 2010-09-30 | ||
| IN2904CH2010 | 2010-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102446635A true CN102446635A (en) | 2012-05-09 |
| CN102446635B CN102446635B (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110299718.1A Active CN102446635B (en) | 2010-09-30 | 2011-09-30 | There is the electric switch of the switch contact of improvement |
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| Country | Link |
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| CN (1) | CN102446635B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57138727A (en) * | 1981-02-20 | 1982-08-27 | Matsushita Electric Works Ltd | Illumination seesaw switch |
| JPS60112215A (en) * | 1983-11-18 | 1985-06-18 | 松下電器産業株式会社 | Switch |
| JPS61110921A (en) * | 1984-11-02 | 1986-05-29 | オムロン株式会社 | Switch |
| CN1595577A (en) * | 2003-09-11 | 2005-03-16 | 西蒙股份公司 | Improved embedded mechanism with rotation key for prompting low voltage circuitry |
| CN101617376A (en) * | 2006-12-15 | 2009-12-30 | Abb研究有限公司 | Contact element |
-
2011
- 2011-09-30 CN CN201110299718.1A patent/CN102446635B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57138727A (en) * | 1981-02-20 | 1982-08-27 | Matsushita Electric Works Ltd | Illumination seesaw switch |
| JPS60112215A (en) * | 1983-11-18 | 1985-06-18 | 松下電器産業株式会社 | Switch |
| JPS61110921A (en) * | 1984-11-02 | 1986-05-29 | オムロン株式会社 | Switch |
| CN1595577A (en) * | 2003-09-11 | 2005-03-16 | 西蒙股份公司 | Improved embedded mechanism with rotation key for prompting low voltage circuitry |
| CN101617376A (en) * | 2006-12-15 | 2009-12-30 | Abb研究有限公司 | Contact element |
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| Publication number | Publication date |
|---|---|
| CN102446635B (en) | 2015-11-18 |
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