EP0410146B1 - Résistance à coulisser - Google Patents

Résistance à coulisser Download PDF

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Publication number
EP0410146B1
EP0410146B1 EP90112044A EP90112044A EP0410146B1 EP 0410146 B1 EP0410146 B1 EP 0410146B1 EP 90112044 A EP90112044 A EP 90112044A EP 90112044 A EP90112044 A EP 90112044A EP 0410146 B1 EP0410146 B1 EP 0410146B1
Authority
EP
European Patent Office
Prior art keywords
casing
carrier
housing
guide rails
resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90112044A
Other languages
German (de)
English (en)
Other versions
EP0410146A2 (fr
EP0410146A3 (en
Inventor
Rita Burger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilhelm Ruf KG
Original Assignee
Wilhelm Ruf KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wilhelm Ruf KG filed Critical Wilhelm Ruf KG
Publication of EP0410146A2 publication Critical patent/EP0410146A2/fr
Publication of EP0410146A3 publication Critical patent/EP0410146A3/de
Application granted granted Critical
Publication of EP0410146B1 publication Critical patent/EP0410146B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/022—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being openable or separable from the resistive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path

Definitions

  • the invention relates to a sliding resistor according to the preamble of claim 1, as is known for example from US-A-4 005 381.
  • sliding resistors are generally known and commercially available.
  • the electrical properties of the known sliding resistors such as linearity, limit values of the electrical resistance in the two end positions of the slide, freedom from hysteresis, etc. depend to a large extent on dimensional tolerances of the individual mechanical components of the sliding resistor.
  • An important influencing variable is the exact positioning of the resistance carrier in the housing.
  • it is known to rivet the resistance carrier in the housing, which is complex to manufacture and presupposes that the corresponding holes for the rivets both on the resistance carrier and are also precisely positioned on the housing.
  • the resistance carrier is only inserted into a frame of the housing from above. Due to the play required for this, the resistance carrier can still be moved slightly within the housing even after the final assembly, so that the electrical properties mentioned above are not obtained to the desired extent.
  • the main advantage is a significantly simplified assembly.
  • the resistance carrier and the wiper carrier with wiper spring are inserted into the housing from one end without, above all, the resistance carrier having to be positioned exactly.
  • the housing is then closed by the housing cover, which snaps into the housing with a snap lock. Due to the resilient web attached to the housing, the resistance carrier is also clearly positioned in the insertion direction and held there. Additional operations for positioning and / or fastening the resistance carrier in the housing are not required.
  • the precise execution of the assembly steps is irrelevant to the precision of the electrical properties of the sliding resistor.
  • the housing and the housing cover are each plastic injection molded parts, in particular the guide rails and the resilient web are each formed in one piece with the associated part. This results in a better dimensional accuracy of the mechanical parts, since primarily only the dimensional accuracy of the plastic injection mold is decisive. This also increases functional reliability, since no separate parts for guide rails and springs are required, which could otherwise lead to failures due to the way they are fastened.
  • One end of the housing can be closed by the housing cover, both the guide rails in the housing and the slot for guiding the wiper carrier to this side are open, so that these parts can be mounted from one side with an insertion direction.
  • the resistance carrier is held even more precisely in the housing.
  • the T-shaped snap hooks on the housing cover ensure that the housing cover is securely attached to the housing, so that it cannot come loose even when vibrated. Functional safety is promoted as a whole.
  • the chamfer on the guide rails simplifies assembly.
  • the sliding resistance has a housing 1 with a substantially cuboid outer contour.
  • One end face of the housing 1 is open and can be closed by an essentially rectangular housing cover 2 become.
  • a rectangular resistance carrier 3 is arranged in the interior of the housing, on the upper side of which one or more resistance tracks 4 are applied.
  • the top of the housing 1 has an elongated hole-shaped opening 5, through which a grinder support 6 extends and is displaceably guided there.
  • a wiper spring 7 is fastened on the side of the wiper carrier facing the resistance carrier 3 and has a plurality of wiper arms 8 (cf. FIG. 3), each of which touches an associated resistance path 4.
  • the individual arms 8 are made of electrically conductive, resilient material and attached to a common strip 9, so that they lie in electrical parallel connection to each other.
  • contact lugs 9 are attached, which are in electrical contact with the ends of the resistance tracks 4 or a conductor track 10.
  • the contact lugs 9 protrude through openings 11 in the end face 12 of the housing 1 facing away from the housing cover 2.
  • latching hooks projecting beyond the end face 12 are integrally attached to the housing 1. With this locking hook 13, the sliding resistance to another object, such as. B. a circuit board.
  • two mutually opposite guide rails 14 are present in the interior of the housing 1, which have guide grooves 15 directed towards one another and extend essentially through the entire length of the housing.
  • the resistance carrier is held in these guide rails 14 and can be inserted from the open end face of the housing 1.
  • bevels 16 are provided on the ends of the guide rails facing the open end of the housing 1.
  • the resistance carrier 3 is pushed in from the open end face of the housing 1 until the front side 17 lying in the insertion direction comes to a stop against stops 18 on the inside of the end wall 12.
  • the resistance carrier 3 is thus clearly and reproducibly fixed in the insertion direction.
  • the two axes perpendicular to the direction of insertion are fixed by the guide rails 14.
  • a fixation against the direction of insertion is carried out by the housing cover 2, specifically by a resilient web 19 present there, which is made of the material of the housing cover 2 through two parallel incisions 20 and 21 is formed.
  • the resilient web 18 presses against the rear edge of the resistance carrier 3, as seen in the insertion direction, and presses it permanently against the stops 18.
  • the guide rails 14 of the housing 1 are briefly aligned with the interior of the housing 1 protruding guide sections 22 are provided which fix the rear end of the resistance carrier in relation to the housing cover 2.
  • these guide sections also have chamfers 23.
  • the rear ends of the guide rails 14 also have chamfers 24 which facilitate insertion of the resistance carrier.
  • the housing cover 2 has integrally molded locking tongues 25 which are T-shaped in plan view.
  • the outer sides of the housing have corresponding T-shaped recesses, behind which the locking tongues snap into place.
  • the locking tongues each have a chamfer 27 for pushing on the housing cover.
  • the wiper carrier 6 has four sections that can be distinguished from one another, namely a first cuboid section 28 to which the wiper spring 7 is fastened.
  • the special type of this attachment is in DE-OS 36 29 002.5 of the applicant.
  • This first section 28 is wider than the slot-shaped opening 5 of the housing 1.
  • a second section 29 with a rectangular cross section adjoining the first section 28 is arranged in the slot-shaped recess 5 and thus guides the wiper carrier 6 in the recess 5.
  • This is followed a third section 30, which is significantly wider than the slot-shaped recess 5 and has an approximately H-shaped contour in the plan view of FIG. 2.
  • the two lateral legs 31 and 32 formed in this way rest with dome-like projections 33 on a guide track 34 which is formed by the upper side of a housing wall 35, the slot-shaped opening 5 being excluded from this housing wall 35.
  • This housing wall 35 is offset inwards relative to an upper edge 36 of the housing 1, specifically by approximately the width of the third section 30. The upper side of the third section 30 is thus aligned with the upper edge 36 of the housing.
  • the third section 30 is followed by a fourth section 37 with a cylindrical shape, which serves as a gripping or actuating element for the sliding resistance.
  • the slot-shaped opening 5 extends up to the end face of the housing, to which the housing cover 2 is attached. In the area of the other end face 12, however, the opening 5 ends at a stop formed by the housing wall 35.
  • the movement path of the grinder carrier is thus limited on the one hand by the stop 38 and on the other hand by the housing cover 2.
  • the housing 1, the housing cover 2 and the grinder support 6 are each plastic injection molded parts that can be easily mass-produced.
  • the assembly of the sliding resistor is particularly easy.
  • the resistance member 3 is inserted into the open end face of the housing 1 between the guideways 14.
  • the contact lugs 9 then pass through the opening 11 and the front edge of the resistance carrier 3 comes into contact with the stops 18.
  • the wiper carrier 6 is inserted into the slot-shaped opening 5.
  • the housing cover 2 is put on until the locking tongues 25 engage. All assembly steps are therefore carried out from one end of the housing in the same direction.
  • the individual parts are largely secured during assembly.
  • the assembly steps are also very simple. Nevertheless, the spatial design of the individual parts provides an exactly reproducible and extremely precise position of the parts relative to one another, which means that the electrical resistance values can be precisely maintained regardless of assembly tolerances or dimensional tolerances of the mechanical components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)

Claims (10)

  1. Rhéostat à curseur muni d'un boîtier, d'un support de résistance disposé dans le boîtier et comprenant au moins une piste de résistance rapportée sur sa face supérieure, d'un support de curseur ou frotteur disposé coulissant dans un trou oblong du boîtier et d'un ressort de curseur fixé au support de curseur et qui est en contact avec la piste de résistance, deux rails de guidage opposés l'un à l'autre (14) et entre lesquels est maintenu le support de résistance (3) étant disposés à l'intérieur du boîtier (1), caractérisé en ce que les rails de guidage (14) sont ouverts vers l'une des faces frontales du boîtier (1), en ce qu'un couvercle de boîtier (2) est prévu sur cette face frontale du boîtier (1) et en ce qu'une barrette à suspension élastique (19) du couvercle de boîtier (2) est en contact avec la face frontale du support de résistance (3).
  2. Rhéostat à curseur selon la revendication 1, caractérisé en ce que sur la face frontale (12) du boîtier (1) opposée au couvercle de boîtier (2), est prévue au moins une butée (18) qui est en contact avec l'autre face frontale (17) du support de résistance (3).
  3. Rhéostat à curseur selon la revendication 1 ou 2, caractérisé en ce que la barrette à suspension élastique (19) est reliée monobloc au couvercle de boîtier (2) et en ce que deux découpes (20) courant parallèlement l'une à l'autre sont prévues dans le couvercle de boîtier (2).
  4. Rhéostat à curseur selon l'une des revendications 1 à 3, caractérisé en ce que le trou oblong (5) est ouvert dans la direction vers la face frontale du boîtier (1), sur laquelle est prévu le couvercle de boîtier (2), et en ce que le couvercle de boîtier (2) est disposé directement au voisinage de cette ouverture du trou oblong.
  5. Rhéostat à curseur selon l'une des revendications 1 à 4, caractérisé en ce que sont également prévus sur le couvercle de boîtier (2), des rails de guidage (22), ces rails étant disposés en correspondance aux rails de guidage (14) du boîtier (1) et dans l'alignement de ceux-ci, et en ce que les rails de guidage (22) du couvercle de boîtier (2) font saillie à l'intérieur du boîtier (1).
  6. Rhéostat à curseur selon l'une des revendications 1 à 5, caractérisé en ce que sont prévus sur le couvercle de boîtier (2), deux crochets de verrouillage en forme de T (25) qui s'engagent dans des cavités correspondantes (26) sur la face extérieure du boîtier (1).
  7. Rhéostat à curseur selon l'une des revendications 1 à 6, caractérisé en ce que sont prévus sur la face frontale opposée (12) au couvercle de boîtier du boîtier (1) des ouvertures (11) qui sont traversées par des pattes de soudage (9) reliées aux pistes de résistance.
  8. Rhéostat à curseur selon l'une des revendications 1 à 7, caractérisé en ce que les rails de guidage (14) sont reliés monobloc au boîtier (1) réalisé en matière synthétique.
  9. Rhéostat à curseur selon l'une des revendications 1-à 8, caractérisé en ce que la paroi (35) du boîtier (1), dans laquelle est prévu le trou oblong (5) est disposée décalée vers l'intérieur par rapport à la face supérieure (36) du boîtier (1).
  10. Rhéostat à curseur selon l'une des revendications 1 à 9, caractérisé en ce qu'aux extrémités ouvertes des rails de guidage (14, 21) sont prévus des chanfreins (24, 23).
EP90112044A 1989-07-24 1990-06-25 Résistance à coulisser Expired - Lifetime EP0410146B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8908984U 1989-07-24
DE8908984U DE8908984U1 (de) 1989-07-24 1989-07-24 Schiebewiderstand

Publications (3)

Publication Number Publication Date
EP0410146A2 EP0410146A2 (fr) 1991-01-30
EP0410146A3 EP0410146A3 (en) 1992-04-29
EP0410146B1 true EP0410146B1 (fr) 1995-01-25

Family

ID=6841379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112044A Expired - Lifetime EP0410146B1 (fr) 1989-07-24 1990-06-25 Résistance à coulisser

Country Status (2)

Country Link
EP (1) EP0410146B1 (fr)
DE (2) DE8908984U1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005473A (en) * 1995-01-20 1999-12-21 Alps Electric Co., Ltd. Rotary operation type variable resistor
GB2370695B (en) * 1999-04-01 2002-12-18 Penny & Giles Controls Ltd Potentiometer
DE102006045500A1 (de) * 2006-09-27 2008-04-17 Hella Kgaa Hueck & Co. Potentiometer zur Sensierung des Verstellweges eines Stellantriebs
CN108711478B (zh) * 2018-05-20 2020-10-02 福州思琪科技有限公司 一种可调电阻的调节装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2310136A1 (de) * 1973-03-01 1974-09-05 Ruf Ohg Wilhelm Schiebewiderstand
US4005381A (en) * 1975-06-09 1977-01-25 Dale Electronics, Inc. Slide potentiometer

Also Published As

Publication number Publication date
EP0410146A2 (fr) 1991-01-30
EP0410146A3 (en) 1992-04-29
DE8908984U1 (de) 1989-09-14
DE59008338D1 (de) 1995-03-09

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