WO2016173250A1 - 电涌保护器 - Google Patents

电涌保护器 Download PDF

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Publication number
WO2016173250A1
WO2016173250A1 PCT/CN2015/095935 CN2015095935W WO2016173250A1 WO 2016173250 A1 WO2016173250 A1 WO 2016173250A1 CN 2015095935 W CN2015095935 W CN 2015095935W WO 2016173250 A1 WO2016173250 A1 WO 2016173250A1
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WO
WIPO (PCT)
Prior art keywords
sleeve
metal
insulating sleeve
disposed
connecting terminal
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Application number
PCT/CN2015/095935
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English (en)
French (fr)
Inventor
陈斌
Original Assignee
陈斌
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Publication of WO2016173250A1 publication Critical patent/WO2016173250A1/zh

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C7/00Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12Overvoltage protection resistors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Definitions

  • the present invention relates to a surge protector.
  • surge protector in the It is used to protect various electrical equipment in low-voltage distribution systems from lightning overvoltage, operating overvoltage and other conditions.
  • the existing surge protector has poor sealing performance and does not have the functions of waterproofing, dustproof and anti-corrosion. Under the harsh environment, it may be affected by environmental factors, and the inside is corroded by sand and liquid, resulting in a surge protector. The work is not working properly.
  • the present invention proposes a surge protector that solves the problem of poor sealing in the prior art.
  • the utility model comprises a casing with a bottom end closed top opening, a first insulating sleeve disposed at the bottom end of the casing, an aluminum piece disposed in the first insulating sleeve, a varistor chip disposed on the aluminum piece and electrically connected to the aluminum piece a metal connecting terminal disposed on the varistor chip and electrically connected to the varistor chip, a second insulating sleeve disposed on the metal connecting terminal, a spacer disposed on the second insulating sleeve, and a spacer disposed on the second insulating sleeve a circlip on the gasket, the varistor chip is received in the first insulating sleeve, a middle portion of the metal connecting terminal forms a step portion, and the second insulating portion is sleeved on the metal connecting terminal at a portion above the step portion a first sleeve, a second sleeve disposed on the lower portion of the metal connecting terminal at
  • the varistor chip since the varistor chip is located at the bottom of the casing, the varistor chip is placed in the first insulating sleeve, and the metal connecting terminal is crimped.
  • Varistor chip And inserting a second insulating sleeve on the metal connecting terminal, wherein the metal connecting terminal is provided with a first collar and a second collar respectively abutting in the second insulating sleeve to function as an insulation and an internal seal.
  • the gasket is crimped on the second insulating sleeve and crimped by a snap spring to serve as an external seal to achieve dustproof and waterproof effects.
  • Figure 1 is a schematic longitudinal sectional view of a surge protector of the present invention.
  • 100 surge protector; 10, housing; 20, first insulating sleeve; 30, aluminum sheet; 40, varistor chip; 50 , metal connecting terminal; 60, second insulating sleeve; 70, gasket; 80, circlip; 11, bottom; 12, side; 21, bottom wall; 22, annular side wall; , the first metal column; 52, the second metal column; 53, the third metal column; 91, the first ring; 55, the step portion; 92, the second ring; 82, the disc spring; 61, the first sleeve ; 62 , the second sleeve; 63, the connecting ring; 93, the third ring.
  • the surge protector 100 is a voltage-limited surge protector including a housing 10 and is disposed in the housing 10 a first insulating sleeve 20, an aluminum sheet 30 disposed in the first insulating sleeve 20, a varistor chip 40 disposed on the aluminum sheet 30 and electrically connected to the aluminum sheet 30, and a varistor chip disposed on the varistor chip 40 a metal connecting terminal 50 electrically connected to the varistor chip 40, a second insulating sleeve 60 disposed on the metal connecting terminal 50, a spacer 70 disposed on the second insulating sleeve 60, and a spacer disposed on the spacer Circlip 80 on 70.
  • the housing 10 may be an aluminum outer casing having a cylindrical shape with a bottom end closing the top opening.
  • the housing 10 includes a circular bottom surface 11 and the bottom surface The outer periphery of 11 is vertically extended upwardly to form a side 12 .
  • the first insulating sleeve 20 is received in the housing 10 and located at the bottom end of the housing 10.
  • the first insulating sleeve 20 The insulating sleeve for the flame retardant material comprises an annular bottom wall 21 and an annular side wall 22 extending vertically upward from the outer periphery of the bottom wall 21.
  • the bottom wall 21 of the first insulating sleeve 20 and the housing 10 The periphery of the bottom surface is in contact with the annular side wall 22 of the first insulating sleeve 20 in contact with the inner wall of the housing 10.
  • the aluminum sheet 30 has a circular plate shape and has the same thickness as the bottom wall 21 of the first insulating sleeve 20, and has the same size as the first insulating sleeve 20
  • the bottom wall 21 has the same inner diameter, and the aluminum piece 30 is just received in the bottom 21 wall of the first insulating cover 20.
  • the varistor chip 40 has a circular plate shape and a thickness thereof and an annular sidewall of the first insulating sleeve 20.
  • the height of 22 is the same as the inner diameter of the annular side wall 22 of the first insulating sleeve 20, and the varistor chip 40 is just received in the annular side wall of the first insulating sleeve 20.
  • the upper and lower surfaces of the varistor chip 40 are respectively plated with silver, and a glass glaze layer is provided on the side.
  • the metal connection terminal 50 may be a copper connection terminal including a first metal post 51 disposed on the varistor chip 40. a second metal post 52 connected to the top end of the first metal post 51 and a third metal post 53 connected to the top end of the second metal post 52.
  • the first metal pillar 51 and the second metal pillar 52 And the third metal column 53 is cylindrical and its central axis is on the same straight line.
  • the outer diameter of the first metal post 51 is the same as the outer diameter of the aluminum piece 30, and is smaller than the outer diameter of the varistor chip 40, In order to ensure that the metal connection terminal 50 and the aluminum piece 30 are completely in contact with the varistor chip 40, to ensure that the lightning current does not pass through the varistor chip under the lightning overvoltage condition, the metal connection terminal 50 and the aluminum piece are caused. 30 Direct conduction.
  • the outer diameter of the second metal post 52 is larger than the outer diameter of the first metal post 51.
  • a first collar 91 is sleeved on the top end of the second metal post 52.
  • the third metal column 53 The outer diameter is smaller than the outer diameters of the first metal post 51 and the second metal post 52, and a step portion is formed between the second metal post 52 and the third metal post 53. .
  • a second collar 92 is sleeved and fixed in the middle of the third metal column.
  • the bottom end of the third metal post 53 is sleeved by a disc spring 82, and the periphery of the disc spring 82 abuts against the step portion 55.
  • the second insulating sleeve 60 is a flame-retardant insulating sleeve, and is disposed on the second metal pillar 52 and the third metal pillar 53 of the metal connecting terminal 50.
  • the first sleeve 61 is sleeved on the outer periphery of the top end of the second metal column 52
  • the second sleeve 62 is sleeved on the outer periphery of the third metal column 53, and is connected to the first sleeve 61 and the second sleeve 62.
  • the connection between the rings 63 The first sleeve 61 extends in the longitudinal direction of the second metal post 52 with its central axis overlapping the central axis of the second metal post 52.
  • the first sleeve 61 The inner diameter is slightly larger than the outer diameter of the second metal post 52, and the inner wall abuts against the outer wall of the first collar 91, and the outer wall abuts against the inner wall of the housing 10.
  • the second sleeve 62 is along the third metal 53 The longitudinal extension of the central axis overlaps the central axis of the third metal post 53.
  • the inner diameter of the second sleeve 62 is slightly larger than the outer diameter of the third metal post 53, and the inner wall and the second collar 92 The outer wall is against.
  • the connecting ring 63 is located above the step portion 55 and abuts against the disc spring 82, and its outer periphery is perpendicularly connected to the top end of the first sleeve 61, and the inner circumference and the second sleeve 62 The bottom end is connected vertically.
  • the bottom end of the second sleeve 62 is sleeved with a third collar 93.
  • the third collar 93 is located on the connecting ring 63 and has the same width as the connecting ring 63. That is, the third collar 93
  • the inner side abuts against the bottom end of the second sleeve 92 and the outer side abuts against the housing 10 of the surge protector 100.
  • the gasket 70 is annular and sleeved on the second sleeve 62 of the second insulating sleeve 60 and sandwiched between the retaining spring 80 and the second insulating sleeve. 60 between the connecting rings 63.
  • the spacer 70 has the same width as the width of the connecting ring 63, the inner side of which abuts against the second sleeve 62, and the outer side of the housing 10 of the surge protector 100. Affordable.
  • the retaining spring 80 is sleeved on the second sleeve 62 of the second insulating sleeve 60 and abuts against the spacer 70.
  • the circlip 80 The inner side of the second sleeve 62 abuts against the outer wall of the second sleeve 62, and the outer side thereof is engaged in the card slot of the inner wall of the housing 10 of the surge protector 100.
  • the surge protector 100 is placed in the first insulating sleeve because the varistor chip 40 is located at the bottom of the housing 10.
  • the metal connecting terminal 50 is crimped to the varistor chip 40
  • the second insulating sleeve 60 is sleeved on the metal connecting terminal 50
  • the metal connecting terminal 50 is respectively provided against the second insulating sleeve.
  • the first ring 91 and the second ring 92 in the 60 are used for the function of insulation and internal sealing
  • the third sleeve 93 is sleeved on the second insulating sleeve 60, and the pad is pressed on the third ring 93.
  • the varistor chip 40 is larger than the metal connection terminal 50 and the aluminum sheet 30
  • the outer diameter of the metal connection terminal 50 and the varistor chip 40 are in surface contact, and have the advantages of large flow rate, rapid flow, and low residual voltage. Due to the varistor chip 40
  • the outer periphery is coated with a glass glaze layer and is located in the first insulating sleeve 20, and the first insulating sleeve 20 is made of a flame retardant material even if the varistor chip 40 It is punctured and ignited, and it is impossible to ignite other parts in the casing.
  • the open flame is extinguished in the casing to achieve the purpose of fire prevention. Due to the structure of the metal connection terminal 50, the housing 10 is made There is sufficient air space inside, and the outer wall has a large thickness to achieve the purpose of explosion protection.
  • the surge protector 100 can still work normally under harsh environments, improving the safety of the surge protector.
  • the disc spring 82 The number of the second insulating sleeve 60 is directly disposed on the step portion 55 of the metal connecting terminal 50, which may be one or two or more, and may not be provided with a disc spring. .

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

一种电涌保护器(100),包括壳体(10)、设于壳体内的第一绝缘套(20)、设于第一绝缘套内的铝片(30)、设于铝片上的压敏电阻芯片(40)、设于压敏电阻芯片上的金属连接端子(50)、设于金属连接端子上的第二绝缘套(60)、设于第二绝缘套上的垫片(70)及卡簧(80),压敏电阻芯片收容于第一绝缘套内,金属连接端子的中部形成台阶部(55),第二绝缘套包括套设于金属连接端子于台阶部上的第一套筒(61)、于台阶部下的第二套筒(62)及连接第一套筒与第二套筒之间的连接环(63),第二套筒的外侧与壳体的内壁相抵靠,金属连接端子上套设有第一套环(91)及第二套环(92),各套环外周缘分别与第一套筒及第二套筒的内壁相抵靠,卡簧套设于第二绝缘套上并外侧卡设于壳体内。该电涌保护器兼顾内外密封的效果,达到防尘等目的。

Description

电涌保护器 电涌保护器
技术领 域
本发明涉 及一种电涌保护器。
背景技术
由于外部或内部原因,大部分电路中都会存在电涌,电涌的存在一定程度上会影响电路的使用稳定性,同时也会给用电器造成一定的损害,为了减少电涌的存在,一般电路中都会设有电涌保护器,以 用来保护低压配电系统中各种电器设备免受雷电过电压、操作过电压等状况时损坏。
现有电涌保护器,密封性不好,不具备防水、防尘及防腐蚀的性能,在环境恶劣的条件下,可能受到环境因素影响,内部被沙尘、液体侵蚀,导致电涌保护器的工作不正常。
发明内容
本发明提出一 种电涌保护器,解决了现有技术中密封性不好的问题。
本发明的技术方案是这样实现的:
一种 电涌保护器 , 包括底端封闭顶端开口的壳体、设于该壳体内底端的第一绝缘套、设于该第一绝缘套内的铝片、设于该铝片上并与铝片电连接的压敏电阻芯片、设于该压敏电阻芯片上并与压敏电阻芯片电连接的金属连接端子、设于该金属连接端子上的第二绝缘套、设于该第二绝缘套上的垫片及设于该垫片上的卡簧,所述压敏电阻芯片收容于第一绝缘套内,所述金属连接端子的中部形成一台阶部,所述第二绝缘包括套设于金属连接端子于台阶部上方部分的第一套筒、套设于金属连接端子于台阶部下方部分的第二套筒及连接于第一套筒与第二套筒之间的连接环,所述连接环位于台阶部上,所述第二套筒的外侧与壳体的内壁相抵靠,所述金属连接端子上于靠近台阶部的位置及台阶部上方部分的中部分别套设有第一套环及第二套环,所述第一套环及第二套环的内侧固定于金属连接端子上,第一套环的外周缘与第一套筒的内壁相抵靠,第二套环的外周缘与第二套筒的内壁相抵靠,所述垫片夹设于卡簧与第二绝缘套的连接环之间,所述卡簧的内侧与第二绝缘套的外壁相抵靠,其外侧卡设于壳体内壁内。
本发明的有益效果为:
本发明中 的电涌保护器由于压敏电阻芯片 位于壳体内底部, 压敏电阻芯片 置于第一绝缘套中,金属连接端子压接 压敏电阻芯片 ,并于金属连接端子上套入第二绝缘套,金属连接端子上设有分别抵靠于第二绝缘套内的第一套环及第二套环,以起到绝缘及内部密封的作用,在第二绝缘套上压接垫片并使用卡簧压接,以起到外部密封的作用,从而达到防尘、防水的目的。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图 1 为本发明电涌保护器的纵剖面示意 图。
图中:
100 、电涌保护器; 10 、壳体; 20 、第一绝缘套; 30 、铝片; 40 、压敏电阻芯片; 50 、金属连接端子; 60 、第二绝缘套; 70 、垫片; 80 、卡簧; 11 、底面; 12 、侧面; 21 、底壁; 22 、环形侧壁; 51 、第一金属柱; 52 、第二金属柱; 53 、第三金属柱; 91 、第一套环; 55 、台阶部; 92 、第二套环; 82 、碟簧; 61 、第一套筒; 62 、第二套筒; 63 、连接环; 93 、第三套环 。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
如图 1 所示,该电涌保护器 100 为电压限制型电涌保护器,其包括壳体 10 、设于该壳体 10 内的第一绝缘套 20 、设于该第一绝缘套 20 内的铝片 30 、设于该铝片 30 上并与铝片 30 电连接的压敏电阻芯片 40 、设于该压敏电阻芯片 40 上并与压敏电阻芯片 40 电连接的金属连接端子 50 、设于该金属连接端子 50 上的第二绝缘套 60 、设于该第二绝缘套 60 上的垫片 70 及设于该垫片 70 上的卡簧 80 。
所述壳体 10 可为铝外壳,其为底端封闭顶端开口的圆筒状。该壳体 10 包括一圆形的底面 11 及由该底面 11 的外周缘向上垂直延伸形成的侧面 12 。
所述第一绝缘套 20 收容于壳体 10 内,并位于壳体 10 的底端。该第一绝缘套 20 为阻燃材料绝缘套,其 包括一环形的底壁 21 及由该底壁 21 的外周缘向上垂直延伸的环形侧壁 22 。该第一绝缘套 20 的底壁 21 与壳体 10 的底面的外围相接触,该第一绝缘套 20 的环形侧壁 22 与壳体 10 的内壁相接触。
所述铝片 30 为圆形板状,其厚度与第一绝缘套 20 的底壁 21 厚度相同,其大小与第一绝缘套 20 的底壁 21 的内径相等,该铝片 30 刚好收容于第一绝缘套 20 的底 21 壁内。所述压敏电阻芯片 40 为圆形板状,其厚度与第一绝缘套 20 的环形侧壁 22 的高度相同,其大小与第一绝缘套 20 的环形侧壁 22 的内径相同,该压敏电阻芯片 40 刚好收容于第一绝缘套 20 的环形侧壁 22 内以定位。该压敏电阻芯片 40 的上、下表面分别镀银,侧面设有玻璃釉层。
所述金属连接端子 50 可为铜连接端子,其包括设于压敏电阻芯片 40 上的第一金属柱 51 、连接于该第一金属柱 51 顶端的第二金属柱 52 及连接于该第二金属柱 52 顶端的第三金属柱 53 。所述第一金属柱 51 、第二金属柱 52 及第三金属柱 53 均为圆柱状,其中心轴线在同一条直线上。该第一金属柱 51 的外径与铝片 30 的外径相同,且均小于压敏电阻芯片 40 的外径, 以保证金属连接端子 50 及铝片 30 均与 压敏电阻芯片 40 完全接触,确保雷电过电压状态下,雷电流不经过 压敏电阻芯片 ,致使金属连接端子 50 与铝片 30 直接导通 。该第二金属柱 52 的外径大于第一金属柱 51 的外径。该第二金属柱 52 的顶端套设有一第一套环 91 。该第三金属柱 53 的外径均小于第一金属柱 51 及第二金属柱 52 的外径,并于第二金属柱 52 与第三金属柱 53 之间形成一台阶部 55 。该第三金属柱的中部套设并固定有第二套环 92 。所述第三金属柱 53 的底端套设由一碟簧 82 ,该碟簧 82 的外围抵靠于台阶部 55 上。
所述第二绝缘套 60 为阻燃材料绝缘套, 套设于金属连接端子 50 的第二金属柱 52 及第三金属柱 53 上,其包括套设于第二金属柱 52 顶端外围的第一套筒 61 、套设于第三金属柱 53 外围的第二套筒 62 及连接于第一套筒 61 与第二套筒 62 之间的连接环 63 。该第一套筒 61 沿第二金属柱 52 的纵向延伸,其中心轴线与第二金属柱 52 的中心轴线相重叠。该第一套筒 61 的内径略大于第二金属柱 52 的外径,其内壁与第一套环 91 的外壁相抵靠,其外壁与壳体 10 的内壁相抵靠。该第二套筒 62 沿第三金属 53 的纵向延伸,其中心轴线与第三金属柱 53 的中心轴线相重叠。该第二套筒 62 的内径略大于第三金属柱 53 的外径,其内壁与第二套环 92 的外壁相抵靠。所述连接环 63 位于台阶部 55 上方并与碟簧 82 相抵靠,其外周缘与第一套筒 61 的顶端垂直连接,内周缘与第二套筒 62 的底端垂直连接。所述第二套筒 62 的底端套设有一第三套环 93 。该第三套环 93 位于连接环 63 上,其宽度与连接环 63 相同。即该第三套环 93 的内侧与第二套筒 92 的底端相抵靠,外侧与电涌保护器 100 的壳体 10 相抵靠。
所述垫片 70 为环形,其套设于第二绝缘套 60 的第二套筒 62 上,并夹设于卡簧 80 与第二绝缘套 60 的连接环 63 之间。该垫片 70 的宽度与连接环 63 的宽度相同,其内侧与第二套筒 62 相抵靠,外侧与电涌保护器 100 的壳体 10 相抵靠。
所述卡簧 80 套设于第二绝缘套 60 的第二套筒 62 上,并抵靠于垫片 70 上。该卡簧 80 的内侧与第二套筒 62 的外壁相抵靠,其外侧卡设于电涌保护器 100 的壳体 10 内壁的卡槽内。
该电涌保护器 100 由于压敏电阻芯片 40 位于壳体 10 内底部, 压敏电阻芯片 40 置于第一绝缘套 20 中,金属连接端子 50 压接 压敏电阻芯片 40 ,并于金属连接端子 50 上套入第二绝缘套 60 ,金属连接端子 50 上设有分别抵靠于第二绝缘套 60 内的第一套环 91 及第二套环 92 ,以起到绝缘及内部密封的作用,在第二绝缘套 60 上套有第三套环 93 ,于第三套环 93 上压接垫片 70 并使用卡簧 80 压接,以起到外部密封的作用,从而达到防尘、防水、防腐蚀的目的。由于压敏电阻芯片 40 的外径大于金属连接端子 50 及铝片 30 的外径,使金属连接端子 50 与压敏电阻芯片 40 采用面式接触,具有通流量大、通流迅速、残压低等优点。由于压敏电阻芯片 40 的外周缘涂有玻璃釉层,并位于第一绝缘套 20 内,且第一绝缘套 20 采用阻燃材料,即使压敏电阻芯片 40 被击穿引燃,也无法引燃壳体内的其他部件,明火随即熄灭在壳体内,达到防火的目的。由于金属连接端子 50 的结构,使壳体 10 内有足够的空气空间,外壁厚度大,以此达到防爆的目的。该电涌保护器 100 在恶劣的环境下,仍能正常工作,提高了电涌保护器的安全性。
具体实施时,所述碟簧 82 的个数不受上述实施例的限制,其可为一个,也可为两个或多个,还可不设有碟簧,使第二绝缘套 60 直接设于金属连接端子 50 的台阶部 55 上。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (9)

  1. 一种电涌保护器,其特征在于:包括底端封闭顶端开口的壳体、设于该壳体内底端的第一绝缘套、设于该第一绝缘套内的铝片、设于该铝片上并与铝片电连接的压敏电阻芯片、设于该压敏电阻芯片上并与压敏电阻芯片电连接的金属连接端子、设于该金属连接端子上的第二绝缘套、设于该第二绝缘套上的垫片及设于该垫片上的卡簧,所述压敏电阻芯片收容于第一绝缘套内,所述金属连接端子的中部形成一台阶部,所述第二绝缘包括套设于金属连接端子于台阶部上方部分的第一套筒、套设于金属连接端子于台阶部下方部分的第二套筒及连接于第一套筒与第二套筒之间的连接环,所述连接环位于台阶部上,所述第二套筒的外侧与壳体的内壁相抵靠,所述金属连接端子上于靠近台阶部的位置及台阶部上方部分的中部分别套设有第一套环及第二套环,所述第一套环及第二套环的内侧固定于金属连接端子上,第一套环的外周缘与第一套筒的内壁相抵靠,第二套环的外周缘与第二套筒的内壁相抵靠,所述垫片夹设于卡簧与第二绝缘套的连接环之间,所述卡簧的内侧与第二绝缘套的外壁相抵靠,其外侧卡设于壳体内壁内。
  2. 如权利要求1所述的电涌保护器,其特征在于:还包括套设于金属连接端子上并位于台阶部上的至少一碟簧,所述第二绝缘套的连接环的下表面与碟簧相抵靠。
  3. 如权利要求1所述的电涌保护器,其特征在于:所述第二套筒的底端套设有一第三套环,该第三套环位于连接环上,其宽度与连接环相同,所述垫片位于第三套环上。
  4. 如权利要求1所述的电涌保护器,其特征在于:所述金属连接端子包括设于压敏电阻芯片上的第一金属柱、由该第一金属柱顶端向上延伸的第二金属柱及由该第二金属柱顶端向上延伸的第三金属柱,所述台阶部位于第二金属柱与第三金属柱之间,所述第一金属柱、第二金属柱及第三金属柱均为圆柱状,其中心轴线在同一条直线上,所述第一套筒套设于第二金属柱上,所述第二套筒套设于第三金属柱上。
  5. 如权利要求4所述的电涌保护器,其特征在于:所述第一金属柱的外径与铝片的外径相同,且均小于压敏电阻芯片的外径,所述第三金属柱的外径小于第一金属柱的外径。
  6. 如权利要求1至5中任何一项所述的电涌保护器,其特征在于:所述第一绝缘套包括一环形的底壁及由该底壁的外周缘向上垂直延伸的环形侧壁,所述铝片设于该第一绝缘套的底壁内,该铝片为圆形板状,其厚度与第一绝缘套的底壁厚度相同,其大小与第一绝缘套的底壁的内径相等,所述压敏电阻芯片收容于环形侧壁内,其厚度与第一绝缘套的环形侧壁的高度相同,其大小与第一绝缘套的环形侧壁的内径相同。
  7. 如权利要求1所述的电涌保护器,其特征在于:所述压敏电阻芯片的外径均大于铝片的外径及金属连接端子底端的外径。
  8. 如权利要求1至5中任何一项所述的电涌保护器,其特征在于:所述压敏电阻芯片的上、下表面分别镀银,侧面设有玻璃釉层。
  9. 如权利要求1至5中任何一项所述的电涌保护器,其特征在于:所述第一绝缘套及第二绝缘套均为阻燃材料绝缘套。
PCT/CN2015/095935 2015-04-29 2015-11-30 电涌保护器 WO2016173250A1 (zh)

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