Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
  • H01H85/02—Details
  • H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
  • H01H85/303—Movable indicating elements

Definitions

• Fuse insert in particular for low-voltage high-performance fuses, also called NH fuses, the working fusible conductor (1) of which is monitored by an indicator fusible conductor (3) which is arranged in parallel electrically and which holds a spring element (4) tensioned by a circuit board (5), which is connected to a signal element (7) slidably guided along the body (6) of the fuse link, which in a visible area (8) indicates the response status of the ammunition fuse in a visible area when the display fuse element responds by conspicuous execution.
• the signal element (7) as Foil is guided, which is made in a transition area (1 1) to the spring element narrower than in the visible area (12) and in a head area (13) for attachment to the Fedei element (4), starting from a large width of the head area (13) than it has its lead-through opening (14) in the circuit board (5), is pointed to a tip
• the invention relates to a fuse link, in particular for low-voltage, high-performance fuses, also known as NH fuses, the working fuse of which is monitored by an indicator fuse which is arranged electrically in parallel therewith.
• the display fuse element holds a spring element in front of a circuit board.
• the spring element is also connected to a signal element which is displaceably guided along the body of the fuse link and which indicates the response state of the working fuse element in a visible area when the display fuse element is triggered by a striking design.
• a fuse link is known (DE-U-2 97 18230).
• Fuse links with a display device generally have a weakening of the body of the fuse link in the area of the display device.
• the body is weakened in a critical area.
• weakening can be avoided in that the signal element is guided largely on the back of the housing of the fuse link and not in a tunnel of the housing body.
• the signal element is expediently protected by a cover and, if necessary, also guided.
• connection of the displaceable signal element which can be made from a film
• the spring element which can also be used as a so-called front indicator
• Gluing, hot stamping, crimping, connecting with shrink film have proven to be complex in practice.
• the invention is based on the object of further developing a fuse link of the type described and 2 visibly improve the connection of the signal element with the spring element:
• the described task is solved by a fuse link according to claim 1.
• the signal element is designed as a film, which is made narrower in a transition area to the spring element than in the visible area; in a head region for fastening to the spring element, starting from a greater width of the head region than its through opening in the circuit board, the signal element tapers to a tip. Through the tip, the signal element can be inserted into the lead-through opening of the board, with bevels forming in the transition to the larger width of the head region, which roll up the signal element formed by the film-like material, so that an assembly position can first be reached and the signal element later pulled out of the board can be.
• the narrow transition area between the viewing area and the head area can run in the lead-through opening of the board and the viewing area takes place in front of the board or in front of one
• Insulation or sealing layer a stop.
• the wide head area allows the signal element to be connected to the spring element using conventional techniques as described above.
• the signal element has at least one more tapered run-up slope in its head region in a transition to the taper region. This makes it easier for the signal element to pass through the circuit board due to its design.
• the spring element has a freely cut mandrel, which is folded against the pulling direction of the signal element.
• This mandrel can be placed perpendicular to the spring element, whereupon the film-like signal element can be pressed so that the mandrel pierces and its undercuts the signal element without further fastening. Hold 3 agents.
• the mandrel can be bent into the plane of the spring element against the pulling direction of the signal element.
• the signal element can be obtained by section from an endless belt.
• FIG. 2 shows a fuse link in the area of interest here, partly in section and shown broken off for the rest.
• the fuse link according to FIG. 2 has a working fuse element 1 with two opposing knife contacts 2 of the usual type.
• a display fuse element 3, which holds a spring element 4 on one of two plates 5, is arranged electrically parallel to the working fuse element.
• the boards have custom grip tabs in the upper area.
• the spring element is illustrated in FIG. 2 in addition to its rest position in the spring-loaded state.
• a signal element 7 is displaceably guided along the body 6 of the fuse link. In a viewing area 8, when the fuse element 3 responds and the spring element 4 springs away when the design is conspicuous, in a display area 9 for the fuse insert addressed when it is moved out, the fuse has triggered.
• the working fuse element is then melted and has caused the fuse to be switched off. 4
• the signal element 7 is covered by a cover 10, through which it can be guided on the back of the body 6 of the fuse link.
• a flat guide groove for the display element can also be formed in the body 6, so that the cover then only covers the signal element to the outside.
• the signal element 7 is designed as a film which is narrower in a transition area 11 to the spring element than in the visible area 12.
• the signal element 7 is tapered to a tip.
• the head region 13 is of a greater width than its through opening 14 in the circuit board 5.
• the spring element 4 can ride on the knife contact 2 in a manner known per se.
• the signal element 7 according to FIG. 1 has two run-on slopes 15, in which the head area tapers more than in its other pointed design. This promotes curling up when inserted into the through opening 14.
• the spring element 4 in the development according to FIG. 3 has a cut-out mandrel 16 which is folded over on the fully assembled fuse link.
• the spring element 4 is shown as it can be made.
• the cushioning of the spring element 4 can be influenced favorably when the display fuse element 3 is addressed.
• the mandrel 16 can be bent out of the plane of the drawing and then folded over in the pulling direction of the spring element, so that it points in the opposite direction according to FIG. If the direction of pull of the signal element is in the opposite direction, the mandrel 16 is in other words folded against the direction of pull of the signal element. 5
• the signal element 7 can be obtained by section from an endless band.
• the pressed-on signal element stops behind the head of the mandrel 16 even before the mandrel is turned over.
• conventional fastening techniques can be used to connect the signal element to the spring element 4.
• the head region can also be made narrower overall. In any case, a play-free connection of the signal element 7 to the spring element 4 is obtained.
• the signal element can be made of polyethylene, resilient and tear-resistant.

Landscapes

• Fuses (AREA)
• Techniques For Improving Reliability Of Storages (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8061388

Family Applications (1)

Country Status (11)

Cited By (2)

Families Citing this family (4)

Citations (1)

• 1998
  • 1998-08-17 DE DE29814737U patent/DE29814737U1/de not_active Expired - Lifetime
• 1999
  • 1999-08-04 CN CN99900004U patent/CN2489556Y/zh not_active Expired - Lifetime
  • 1999-08-04 TR TR2001/00464T patent/TR200100464T2/xx unknown
  • 1999-08-04 ES ES99952299T patent/ES2176030T3/es not_active Expired - Lifetime
  • 1999-08-04 AT AT99952299T patent/ATE215733T1/de not_active IP Right Cessation
  • 1999-08-04 PL PL345749A patent/PL192137B1/pl not_active IP Right Cessation
  • 1999-08-04 CZ CZ20010573A patent/CZ297630B6/cs not_active IP Right Cessation
  • 1999-08-04 DE DE59901145T patent/DE59901145D1/de not_active Expired - Lifetime
  • 1999-08-04 BR BR9913051-3A patent/BR9913051A/pt not_active IP Right Cessation
  • 1999-08-04 HU HU0103674A patent/HU221998B1/hu not_active IP Right Cessation
  • 1999-08-04 EP EP99952299A patent/EP1105903B1/de not_active Expired - Lifetime
  • 1999-08-04 WO PCT/DE1999/002441 patent/WO2000011698A1/de active IP Right Grant

Patent Citations (1)

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