The present invention relates to the technology field of fuse link switch, and more particularly to a protection structure of fuse link switch.
It is well known that fuse link switches are applied in a power system to protect the system's equipment from overload and/or short circuits. A fuse link switch commonly comprises: an insulator, a fuse tube, an upper-end fixing unit, an upper-end conductor connecting unit, a conductive plate spring, a lower-end fixing unit, a lower-end conductor connecting unit, a toggle mechanism, and a mounting bracket. Particularly, an upper cover is adopted for semi-enclosing the upper-end fixing unit and the upper-end conductor connecting unit, and a lower cover is adopted for semi-enclosing the lower-end fixing unit and the lower-end conductor connecting unit. By such arrangements, the upper cover and the lower cover prevent birds from being electrocuted and also protect kites and branches from coming into contact with the fuse link.
However, the conventional fuse link switch still shows a few drawbacks in practical use. The drawbacks are summarized as follows.
(1) Despite both the upper cover and the lower cover being semi-closed housings, there is still a risk of birds being electrocuted and kites and branches coming into contact with the conductive articles covered by the upper cover and/or the lower cover.
(2) Because being covered by the upper cover, it is hard for the engineering staff to control a load break tool to connect a pull ring and/or a pull hook of the fuse tube. Moreover, it is worth mentioning that, during using the load break tool to directly pull the fuse tube to drop out, electric arc is produced between the conductive plate spring and the first electrical connecting element.
(3) The upper cover and the lower cover are commonly both a polyhedron having an accommodation space, such that the upper cover fails to comprehensively contact the upper-end fixing unit and the upper-end conductor connecting unit. Likewise, the lower cover also fails to comprehensively contact the lower-end fixing unit and the lower-end conductor connecting unit.
According to the above descriptions, it is understood that there is room for improvement in the conventional fuse link switch. In view of that, the inventor of the present application has made great efforts to make inventive research and eventually provided a protection structure of fuse link switch.
The primary objective of the present invention is to disclose a protection structure for being applied in a fuse link switch. The fuse link switch comprises: an insulator, a fuse tube including an upper connection portion and a lower connection portion, an upper-end fixing unit, a lower-end fixing unit, and a toggle mechanism, wherein the upper connection portion is connected with a pull hook. The protection structure comprises at least one electrically insulating shielding layer covering at least one of the upper-end fixing unit, the pull hook, the upper connection portion, the lower connection portion, the lower-end fixing unit, and the toggle mechanism through overmolding technique.
For achieving the primary objective mentioned above, the present invention provides an embodiment of the protection structure, which is applied in a fuse link switch. The fuse link switch comprises: an insulator, a fuse tube including an upper connection portion and a lower connection portion, an upper-end fixing unit, a lower-end fixing unit including a lower-end conductor connecting member, and a toggle mechanism, wherein the upper connection portion is connected with a pull hook. Said protection structure is characterized in that: comprising at least one electrically insulating shielding layer covering at least one of the upper-end fixing unit, the pull hook, the upper connection portion, the lower connection portion, the lower-end fixing unit, the lower-end conductor connecting member, and the toggle mechanism, wherein the at least one electrically insulating shielding layer is made of an electrically insulation material.
In one embodiment, the electrically insulation material is silicone rubber.
In one embodiment, the at least one electrically insulating shielding layer is formed to cover at least one of the upper-end fixing unit, the pull hook, the upper connection portion, the lower connection portion, the lower-end fixing unit, the lower-end conductor connecting member, and the toggle mechanism through overmolding technique.
In one practicable embodiment, the at least one electrically insulating shielding layer overall covers at least one of the upper-end fixing unit, the pull hook, the upper connection portion, the lower connection portion, the lower-end fixing unit, the lower-end conductor connecting member, and the toggle mechanism through overmolding technique.
In another one practicable embodiment, the at least one electrically insulating shielding layer locally covers at least one of the upper-end fixing unit, the pull hook, the upper connection portion, the lower connection portion, the lower-end fixing unit, the lower-end conductor connecting member, and the toggle mechanism through overmolding technique.
In one embodiment, the electrically insulating shielding layer locally covers the pull hook, such that at least one part of the pull hook is not covered by the electrically insulating shielding layer.
In one embodiment, the insulator is made of a material selected from a group consisting of polymer material and ceramic material.
The invention as well as a preferred mode of use and advantages thereof will be best understood by referring to the following detailed description of an illustrative embodiment in conjunction with the accompanying drawings, wherein:
To more clearly describe a protection structure of fuse link switch according to the present invention, embodiments of the present invention will be described in detail with reference to the attached drawings hereinafter.
With reference to
When producing the protection structure, the at least one electrically insulating shielding layer (21, 31, 411, 421, 51, 61) is formed to cover at least one of the upper-end fixing unit 20, the pull hook 30, the upper connection portion 41, the lower connection portion 42, the lower-end fixing unit 50, the lower-end conductor connecting member 60, and the toggle mechanism 70 through overmolding technique.
With reference to
Furthermore,
With reference to
In addition,
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Besides,
Therefore, through above descriptions, all embodiments and their constituting elements of the protection structure of the fuse link switch proposed by the present invention have been introduced completely and clearly; in summary, the present invention includes the advantages of:
(1) By forming at least one electrically insulating shielding layer (21, 31, 411, 421, 51, 61) to cover at least one of the upper-end fixing unit 20, the pull hook 30, the upper connection portion 41, the lower connection portion 42, the lower-end fixing unit 50, the lower-end conductor connecting member 60, and the toggle mechanism 70 through overmolding technique, the protection structure prevents birds from being electrocuted and also protects kites and branches from coming into contact with the fuse link switch.
(2) Because the at least one electrically insulating shielding layer (21, 31, 411, 421, 51, 61) is formed through overmolding technique, any one of the upper-end fixing unit 20, the pull hook 30, the upper connection portion 41, the lower connection portion 42, the lower-end fixing unit 50, the lower-end conductor connecting member 60, and the toggle mechanism 70 still has appearance consistency.
(3) The at least one electrically insulating shielding layer (21, 31, 411, 421, 51, 61) has a specific layer thickness, such that any one of the upper-end fixing unit 20, the pull hook 30, the upper connection portion 41, the lower connection portion 42, the lower-end fixing unit 50, the lower-end conductor connecting member 60, and the toggle mechanism 70 is protected from external impact.
The above description is made on embodiments of the present invention. However, the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or alterations within the spirit of the present invention still fall within the scope of the present invention.
Number | Date | Country | Kind |
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111201029 | Jan 2022 | TW | national |
Number | Name | Date | Kind |
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2630508 | Meisenheimer | Mar 1953 | A |
2692315 | Hubbard | Oct 1954 | A |
2734964 | Edwards et al. | Feb 1956 | A |
3041426 | Baker | Jun 1962 | A |
4546341 | McNaghten | Oct 1985 | A |
4768010 | Brown | Aug 1988 | A |
6922132 | Montante | Jul 2005 | B2 |
7532103 | Almgren | May 2009 | B2 |
9349501 | Miyamoto | May 2016 | B2 |
10818407 | Di-Gianni | Oct 2020 | B2 |
Number | Date | Country |
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201498465 | Jun 2010 | CN |
Entry |
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CN-201498465-U—English translation (Year: 2010). |
Number | Date | Country | |
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20230238195 A1 | Jul 2023 | US |