Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
  • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N3/00—Arrangements or adaptations of other passenger fittings, not otherwise provided for
  • B60N3/14—Arrangements or adaptations of other passenger fittings, not otherwise provided for of electrically-heated lighters

Definitions

• the present invention relates to cigar lighters, in particular for motor vehicles, and relates more particularly to the removable heating plug that such a cigar lighter comprises.
• a cigarette lighter comprises an ignition body fixed to a fixed wall of the vehicle such as a console or the dashboard thereof.
• This body on the one hand, carries electrical supply parts as well as a socket outlet member, usually in the form of a bimetallic strip, and, on the other hand, serves as a receptacle for the removable heating plug comprising two parts movable axially with respect to each other against elastic return means with axial action as described for example in document FR-A-2 701 438.
• the mobile part comprises a button made of electrically and thermally insulating material secured to an electrically conductive support carrying electrically insulated an end cup internally receiving an electric heating resistor in the form of a spiral.
• the cup engages with the hooks of the socket outlet bimetallic strip and an electrical circuit is established allowing the heating of the heating resistor.
• the blades of the bimetallic strip expand and the button returns to its initial position under the action of the elastic return means. It then remains only to extract the plug to light, for example, a cigarette.
• a heating plug of the above-mentioned type in which the assembly axis has a bulge with an upper inclined shoulder turned away from the bottom of the cup, is characterized in that the bottom of the cup has, for contact with the outer end of the heating resistance, a plurality of annular sectors stamped towards the inside of the cup, in that the outer end of the heating resistance is clamped between said sectors and the edge of the cup folded inward, while the inner end of the heating resistor follows the shape of the upper shoulder of the bulge of the assembly axis, and in that said sectors are located at the bottom connection with the rounded connection area at the side edge of the cup.
• the resistor is assembled mechanically without welding and the number of parts is reduced, no ring being necessary.
• stampings make it possible to pre-center the electrically insulating washer conventionally interposed between the bottom of the cup and the bulge of the assembly pin to the support of the plug.
• This arrangement makes it possible not to modify the assembly axis or the electrically insulating washer interposed between the bottoms of the cup and of the support.
• the formation of the sectors is easy to carry out and makes it possible to spare resistance due to the formation of free space between the stamped sectors.
• These sectors use simple tools. Generally it is easier to locally stamp the bottom of the cup and this spares the bottom of the cup. In addition, these sectors allow the edge of the cup to be folded down easily. In addition, good electrical contacts are obtained at the ends of the heating resistor. The internal end of said resistor is forced into contact with the upper shoulder.
• the stamped areas are closed here with a shallow depth.
• Figure 1 is a partial axial sectional view of the plug showing the assembly of the resistor with its associated cup according to the invention
• Figure 2 is an axial sectional view along the line A-A of Figure 1.
• Figure 1 we see in 1 the electrically conductive end cup, here metallic, of the heating plug of one cigarette lighter.
• This cup 1 is perforated centrally and serves as a receptacle for the heating resistor 2 in the form of a spiral. It is intended to cooperate in the aforementioned manner with the blades of the bimetallic strip of the ignition body for its heating.
• This cup 1 of hollow annular shape, is fixed to the support 3 of the removable plug by means of an electrically conductive pin 4.
• This support 3 is in the form of a metal socket and has a bottom 5 crossed by the assembly axis 4 used for fixing the cup 1 to the support 3 with the intervention of an electrically insulating washer 6 between the bottom 5 of the support 3 and the bottom 7 of the dish 1.
• the washer 6 can be replaced by a fuse intended to cut the electrically supply circuit of the electrically conductive resistor 2 when the temperature exceeds a predetermined value.
• an electrically insulating washer 8 In the bottom 7 of the cup 1 is arranged an electrically insulating washer 8, the inner edge of which comes to bear on an inclined annular shoulder 9 belonging to a bulge 10 of the axis 4.
• the shoulder 9 will be referred to as the lower shoulder 9 because it is turned towards the bottom 7 of the cup 1.
• This axis 4 crosses central between the support 3 (its bottom 5), the washer 6 , the bottom 7 of the cup 1 and the washer 8.
• the pin 4 is crimped at 11 in contact with the bottom 5 of the support 3 having a peripheral annular bead 12 for contact with the insulating washer 6.
• the support 3 carries electrically insulated the cup 1 and the assembly pin 4 serves as a centering device for the washer 6. Thanks to the shoulder 9, in contact with the inner edge of the washer 8, an automatic centering of the cup 1 is obtained relative to the axis 4 and therefore relative to the support 3 during the crimping of the axis 4 in contact with the face of the base 5 facing away from washer 6 and cup 1.
• the inner edge of the washer 8 takes a frustoconical shape and enters the central opening of the cup 1.
• the axially flexible heating resistor 2 here in the form of a spiral, has an internal end 14 housed in a diametrical slot provided at the free end 15 of the axis
• the resistor 2 is housed in the cup 1 being surrounded by the annular edge 16 which the cup 1 has laterally at the outer periphery of its bottom 7.
• the edge 16 is initially of axial orientation and is connected in one piece to the bottom 7 by a rounded area 17.
• the hollow cup 1 is therefore delimited by the bottom 7 and the edge 16. Initially the resistor 2 is housed in the cup
• the edge 16 of the metal cup 1 in order, in a manner known per se, to give it the external shape necessary for its cooperation with the hooks of the bimetallic plug (not visible) of the cigarette lighter and so that simultaneously the spiral 2 (the heating resistor) is positioned as shown in FIG. 1.
• the edge 16 therefore envelops the resistor 2.
• the bottom 7 of the cup 1 has, at its external periphery, at its connection with the rounded zone 17 for connection to the lateral edge 16, annular sectors 20 here regularly distributed.
• the axis 4 is crimped with fixing of the washers 6.8; and from the cup 1 to the support 3.
• the resistor 2 comes into contact with the sectors 20 and its outer end 19 (its last turn) is deformed (pressed) in the direction of the bottom 7, being allowed to enter the space delimited by the rounded area 17.
• the penultimate turn of the resistor is therefore automatically pressed in contact with the sectors 20 in the form of oblong bosses. Here several turns are in contact with the sectors for the benefit of a good electrical connection.
• the turns of resistance 2 have a V-shaped section. outer 19 of the resistor 2 is clamped between said sectors 20 and the edge 16 of the cup 1 folded inwardly.
• the resistor 2 after rolling the edge 16, follows the shape of the bulge 10 and more particularly the shape of the upper inclined shoulder 22 which the bulge 10 has on the side opposite to its shoulder 9, said bulge 10 having a generally V-shaped section.
• the shoulder 22 is said to be an upper inclined shoulder because it is turned away from the bottom 7 of the cup 1. This shoulder extends in elevation relative to the sectors 20 so that at least the penultimate turn of the internal end 14 of the resistor is forced into contact with said shoulder 22. Good electrical contacts are thus obtained.
• the height of the stampings 20 is generally equal to the height of the washer 8 in contact with the inclined lower shoulder 9.
• stampings 20 stiffen the cup 1 and the axis 4 remains unchanged.
• V-shaped section of the resistor 2 makes it possible not to damage the turns of the resistor 2, in particular when the edge 16 is folded down.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Environmental & Geological Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Transportation (AREA)
• Passenger Equipment (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9469682

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (7)

• 1994
  • 1994-12-08 FR FR9414895A patent/FR2727909A1/fr active Granted
• 1995
  • 1995-12-07 WO PCT/FR1995/001628 patent/WO1996017748A1/fr not_active Application Discontinuation
  • 1995-12-07 US US08/687,468 patent/US5883359A/en not_active Expired - Lifetime
  • 1995-12-07 EP EP95942229A patent/EP0767744A1/fr not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events