The present invention relates to a multi-instruction switch, and particularly to multi-instruction switch capable of enhancing electrical insulation.
Along with the miniaturization of various electronic devices, designs of electronic components correspondingly follow the miniaturization trend.
As the conductive elastic plate 41 comes into contact with the normally closed pin 2 or the normally open pin 3 during up-and-down movements, a contact point is melted by an electric arc as a result of electric discharge. Thus, carbon residue is generated and scattered to the surroundings and even deposited on the insulation block 422. With long-term accumulation, the carbon residue forms a conductive layer that connects the normally closed pin 2 to the normally open pin 3. During a high-voltage test, the conductive layer electrically connects the normally closed pin 2 to the normally open pin 3 in a way that, the micro-switch not only becomes malfunctioning but also fails safety certification of higher amperage and an expected product yield rate.
Therefore the primary object of the present invention is to overcome the above issue of a switch malfunction caused by deposited carbon residue at an insulation block in a conventional switch structure.
To achieve the above object, a multi-instruction switch for enhancing electrical insulation is provided. The multi-instruction switch comprises a housing, a common pin, and a switching pin set. The housing comprises an accommodating space, a conductive elastic plate performing a back-and-forth press process when receiving a user press, and a support rack disposed in the accommodating space. The conductive elastic plate comprises a normal connection section and a switching connection section. The support rack has a limiting track for the switching connection section to move therein. The common pin penetrates through the housing to extend into the accommodating space, and is normally in electrical contact with the normal connection section. The switching pin set, penetrating through the housing to extend into the accommodating space, comprises a first pin and a second pin disposed on the support rack. The first pin comprises a contact section located in the limiting track. The second pin comprises a trigger section located in the limiting track. The limiting track comprises a first insulation plate disposed at the contact section and located between the contact section and the trigger section, a second insulation plate disposed at the trigger section and located between the contact section and the trigger section, and an insulation space located between the first insulation plate and the second insulation plate.
In an embodiment, the support rack comprises a first support portion for fixing the first pin, and a second support portion for fixing the second pin.
In an embodiment, the first support portion comprises a first embedding slot for embedding the first pin; the second support portion is disposed correspondingly to the first embedding slot and is for embedding the second pin.
In an embodiment, the second support portion comprises an engaging slot for fixing the second pin.
In an embodiment, the first pin has a connection section embedded in the first support portion and connected to the contact portion.
In an embodiment, the first insulation plate is connected to the first support portion and the second support portion, and the second insulation plate is connected to the first support portion and the second support portion.
In an embodiment, the thickness of the first insulation plate is greater than the thickness of the contact section, and the thickness of the second insulation plate is greater than the thickness of the trigger section.
In an embodiment, the housing is formed by a base and a cover.
In an embodiment, the housing further comprises a press member assembled with the conductive elastic plate.
In an embodiment, the press member comprises a flexible support member that deforms when receiving a user press during the back-and-forth press operation.
In an embodiment, the housing further comprises a restoration spring disposed in the accommodating space, accommodating around the common pin and connected to the conductive elastic plate.
Compared to a conventional multi-instruction switch structure, the multi-instruction switch of the present invention has the features below.
In the multi-instruction switch for enhancing electrical insulation of to the present invention, an insulation effect is enhanced through the first insulation plate, the second insulation plate and the insulation space located at the limiting track. The first insulation plate and the second insulation plate are capable of cutting off unnecessary contact between the conductive elastic plate and the switching pin set. The insulation space prevents the carbon residue deposit, which is generated during the switching process of the conductive elastic plate, from indirectly conducting the contact section and the trigger section to thus eliminate the issue of a switch malfunction. Therefore, the present invention effectively enhances the electrical insulation capability of the switch.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
A multi-instruction switch for enhancing electrical insulation of the present invention can be implemented in various embodiments according to the different application requirements. Current multi-instruction switches usually comprise at least two pins for switching and outputting different instructions. In the present invention, a multi-instruction switch comprising three pin is taken as an example for explaining the embodiment, not limiting the present invention.
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In the multi-instruction switch for enhancing electrical insulation of the present invention, the insulation effect is enhanced by the first insulation plate, the second insulation plate and the insulation space located at the limiting track. When the conductive elastic plate moves at the limiting track, the first insulation plate and the second insulation late are capable of cutting off unnecessary contact between the conductive elastic plate and the switching pin set, and the insulation space isolates the trigger section from the trigger section. Therefore, the present invention effectively enhances the electrical insulation capability of the switch.
In conclusion, the multi-instruction switch for enhancing electrical insulation of the present invention comprises a housing, a common pin and a switching pin set. The housing has an accommodating space, a conductive elastic plate disposed in the accommodating space, and a support rack disposed in the accommodating space and comprising a limiting track. The switching pin set, penetrating through the housing to extend into the accommodating space, comprises a first pin and a second pin disposed on the support rack. The first pin comprises a contact section located in the limiting track. The second pin comprises a trigger section located in the limiting track. The limiting track has an insulation space between the trigger section and the contact section. Thus, carbon residue generated during a switching process of the conductive elastic plate is not deposited between the contact section and the trigger section, such that the multi-instruction switch of the present invention can be applied to electronic devices having higher amperage.
While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
This application is a continuation-in-part, and claims priority, of from U.S. patent application Ser. No. 13/964,906 filed on Aug. 12, 2013, entitled “MULTI-INSTRUCTION SWITCH FOR ENHANCING ELECTRICAL INSULATION”, the entire contents of which are hereby incorporated by reference.
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Number | Date | Country | |
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20150041439 A1 | Feb 2015 | US |
Number | Date | Country | |
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Parent | 13964906 | Aug 2013 | US |
Child | 14165247 | US |