EP1132935A2 - Electrical component and process for the manufacture thereof - Google Patents

Electrical component and process for the manufacture thereof Download PDF

Info

Publication number
EP1132935A2
EP1132935A2 EP01105565A EP01105565A EP1132935A2 EP 1132935 A2 EP1132935 A2 EP 1132935A2 EP 01105565 A EP01105565 A EP 01105565A EP 01105565 A EP01105565 A EP 01105565A EP 1132935 A2 EP1132935 A2 EP 1132935A2
Authority
EP
European Patent Office
Prior art keywords
viskoelastic
header
electrical component
component according
functional unit
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.)
Granted
Application number
EP01105565A
Other languages
German (de)
French (fr)
Other versions
EP1132935B1 (en
EP1132935A3 (en
Inventor
Jürgen BREITLOW-HERTZFELDT
Ralf Hoffmann
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.)
TE Connectivity Germany GmbH
Original Assignee
Tyco Electronics AMP GmbH
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 Tyco Electronics AMP GmbH filed Critical Tyco Electronics AMP GmbH
Priority to EP20010105565 priority Critical patent/EP1132935B1/en
Publication of EP1132935A2 publication Critical patent/EP1132935A2/en
Publication of EP1132935A3 publication Critical patent/EP1132935A3/en
Application granted granted Critical
Publication of EP1132935B1 publication Critical patent/EP1132935B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H01H50/443—Connections to coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H01H50/305—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature damping vibration due to functional movement of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock

Definitions

  • the invention relates to an electrical component having a functional unit which is secured to a header and which generates or is sensitive to sound, and having terminal elements which are electrically and acoustically coupled to the functional unit and which project through holes in the header onto the side of the header remote from the functional unit, whereby the functional unit is acoustically isolated.
  • Electrical components of the type mentioned at the outset which form a relay and in which the sound-generating functional unit is the electromagnetic drive of the relay, are known. Electrical components of this type are used for example in cars. The switching noise of electrical components of this type is in many cases so loud that it can even be heard in the passenger compartment of the car. To increase driving comfort in the car, it is consequently necessary to dampen the switching noise of the relay.
  • a sound-dampened relay in which the terminal elements are connected to the electromagnetic drive by way of lines which have a pronounced vibration-damping effect is known.
  • a relay of this type has the disadvantage, however, that the lines having a pronounced vibration-damping effect, which are usually made from stranded conductors or sheet-metal strips punched in a meandering shape, have an ohmic resistance which cannot be disregarded. This means that the load circuit resistance of the relay increases to a value which in some cases is no longer acceptable.
  • sound-dampened relays in which dampen elements are arranged in the holes in a header or between the header and the terminal elements, are known. These sound-dampened relays have the disadvantage that because of the sound-damping transition between the terminal element and the header, the terminal elements have only a low level of mechanical strength in the header. Thus, sound-dampened relays of this type cannot be used for plug relays, that is to say relays which are plugged into a socket together with other electronic components.
  • the invention specifies an electrical component on a functional unit which is secured to a header and which generates or is sensitive to sound.
  • Mechanically secured to the header are terminal elements which are electrically and acoustically coupled to the functional unit.
  • the terminal elements project through holes in the header onto the side of the header remote from the functional unit.
  • the terminal elements have a modulus of elasticity of E A > 50 megapascals, and are partially encased in a viskoelastic material having a modulus of elasticity of E W ⁇ 10 megapascals.
  • a viskoelastic material should be understood to mean a material which can be plastically deformed and is elastic enough to return to its original shape again slowly after the deformation.
  • the material is plasto-elastic.
  • the terminal elements are made from a copper alloy or a similar material. These materials have a modulus of elasticity which is greater than 100 megapascals.
  • a casting compound of one-component or two-component synthetic material is possible.
  • a viskoelastic material of this type typically has a modulus of elasticity which is smaller than one megapascal.
  • a viskoelastic material which is a thermoplastic is possible.
  • a component in which a viskoelastic thermoplastic is partially moulded around the terminal elements is particularly advantageous. This means that the components are particularly easy and inexpensive to make.
  • a component in which the terminal elements are arranged in troughs formed by the header, with part sections provided for the encasing is particularly advantageous.
  • the volume contained between an inner wall of the trough and the corresponding terminal element is at least partially filled with viskoelastic material.
  • the functional unit for example the magnet system of an electromagnetic relay is possible.
  • the reduced switching noise of an electromagnetic relay of this type is particularly critical when it is used in motor vehicles, where the invention is used particularly advantageously.
  • the invention discloses a process for manufacturing a component in which a viskoelastic thermoplastic is moulded partially around the terminal elements.
  • the component is particularly easy and inexpensive to make.
  • the invention discloses a process for manufacturing a component, where a viskoelastic material in the liquid state is poured into a trough containing a terminal element and then cured.
  • the component is particularly easy and inexpensive to make.
  • the invention discloses a process for manufacturing a component, having the following steps:
  • Figure 1 shows an electrical component having a header 1 and a functional unit 2.
  • the header 1 may be for example of synthetic material.
  • the functional unit 2 may be for example the electromagnetic drive system of a relay. Through a hole in the header 1 there projects a terminal element 3 which is secured to the header 1 for example by adhesion. A section of the terminal element 3 is encased in a viskoelastic material 4.
  • the functional unit 2 is electrically and acoustically coupled to the terminal element 3 by means of a coupling element 5.
  • Figure 2 shows a header 1 which is constructed to form a trough 7.
  • a section 6 of the terminal element 3 is located in the trough 7 and projects through the header 1 onto the side of the header 1 opposite the trough 7.
  • the functional unit (not illustrated in Figure 2) is located on the same side of the header 1 as the trough 7.
  • Viskoelastic material 4 may be put into the trough 7, for example in liquid form, and subsequently cured.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Abstract

The invention relates to an electrical component having a functional unit (2) which is secured to a header (1) and which generates or is sensitive to sound, and having terminal elements (3) which are mechanically secured to the header (1) and electrically and acoustically coupled to the functional unit (2) and which project through holes in the header (1) onto the side of the header (1) remote from the functional unit (2) and which have a modulus of elasticity of EA > 50 MPa, in which the terminal elements are partially encased in a viskoelastic material (4) having a modulus of elasticity of Ew < 10 MPa. By encasing the terminal elements (3) in a viskoelastic material (4), effective sound-damping can be produced. Furthermore, the invention relates to a process for manufacturing the component.

Description

The invention relates to an electrical component having a functional unit which is secured to a header and which generates or is sensitive to sound, and having terminal elements which are electrically and acoustically coupled to the functional unit and which project through holes in the header onto the side of the header remote from the functional unit, whereby the functional unit is acoustically isolated.
Electrical components of the type mentioned at the outset, which form a relay and in which the sound-generating functional unit is the electromagnetic drive of the relay, are known. Electrical components of this type are used for example in cars. The switching noise of electrical components of this type is in many cases so loud that it can even be heard in the passenger compartment of the car. To increase driving comfort in the car, it is consequently necessary to dampen the switching noise of the relay.
A sound-dampened relay in which the terminal elements are connected to the electromagnetic drive by way of lines which have a pronounced vibration-damping effect is known. A relay of this type has the disadvantage, however, that the lines having a pronounced vibration-damping effect, which are usually made from stranded conductors or sheet-metal strips punched in a meandering shape, have an ohmic resistance which cannot be disregarded. This means that the load circuit resistance of the relay increases to a value which in some cases is no longer acceptable.
Furthermore, sound-dampened relays in which dampen elements are arranged in the holes in a header or between the header and the terminal elements, are known. These sound-dampened relays have the disadvantage that because of the sound-damping transition between the terminal element and the header, the terminal elements have only a low level of mechanical strength in the header. Thus, sound-dampened relays of this type cannot be used for plug relays, that is to say relays which are plugged into a socket together with other electronic components.
It is therefore the object of the present invention to provide an electrical component which is sound-dampened, in which there is no occurrence of increased electrical resistance in the load circuit and in which the terminal elements have sufficient mechanical strength for the electrical component to be used in plug sockets.
This object is achieved in accordance with the invention by an electrical component according to Claim 1. Advantageous embodiments of the invention and processes for manufacturing the invention can be found in the additional claims.
The invention specifies an electrical component on a functional unit which is secured to a header and which generates or is sensitive to sound. Mechanically secured to the header are terminal elements which are electrically and acoustically coupled to the functional unit. The terminal elements project through holes in the header onto the side of the header remote from the functional unit. The terminal elements have a modulus of elasticity of EA > 50 megapascals, and are partially encased in a viskoelastic material having a modulus of elasticity of EW < 10 megapascals. A viskoelastic material should be understood to mean a material which can be plastically deformed and is elastic enough to return to its original shape again slowly after the deformation. The material is plasto-elastic.
As a result of the encasing of the terminal elements, in accordance with the invention, in a viskoelastic material, effective dampening of the sound transmitted by or to the functional unit by way of the terminal elements is achieved. The solution according to the invention makes use of the effect that when sound is transmitted between two different materials shear stress losses of the vibrational energy occur. These losses are larger the greater the difference in the moduli of elasticity of the materials concerned.
Particularly advantageously, the terminal elements are made from a copper alloy or a similar material. These materials have a modulus of elasticity which is greater than 100 megapascals. For the viskoelastic material, a casting compound of one-component or two-component synthetic material is possible. A viskoelastic material of this type typically has a modulus of elasticity which is smaller than one megapascal. Furthermore, and also according to the invention, a viskoelastic material which is a thermoplastic is possible. Furthermore, a component in which a viskoelastic thermoplastic is partially moulded around the terminal elements is particularly advantageous. This means that the components are particularly easy and inexpensive to make.
Moreover, a component in which the terminal elements are arranged in troughs formed by the header, with part sections provided for the encasing, is particularly advantageous. In this case, the volume contained between an inner wall of the trough and the corresponding terminal element is at least partially filled with viskoelastic material. As a result of constructing the header in the form of one or more troughs, in accordance with the invention, the component is easy to manufacture with the aid of liquid viskoelastic material, which is poured into the trough and then cured. In particular, the viskoelastic material is then only located at the points provided for the encasing.
As the functional unit, for example the magnet system of an electromagnetic relay is possible. The reduced switching noise of an electromagnetic relay of this type is particularly critical when it is used in motor vehicles, where the invention is used particularly advantageously.
Furthermore, the invention discloses a process for manufacturing a component in which a viskoelastic thermoplastic is moulded partially around the terminal elements.
As a result of moulding a viskoelastic thermoplastic around the terminal elements, in accordance with the invention, the component is particularly easy and inexpensive to make.
Furthermore, the invention discloses a process for manufacturing a component, where a viskoelastic material in the liquid state is poured into a trough containing a terminal element and then cured.
As a result of manufacturing the component with the aid of a viskoelastic material poured into a trough in the liquid state, in accordance with the invention, the component is particularly easy and inexpensive to make.
Moreover, the invention discloses a process for manufacturing a component, having the following steps:
  • a) introducing a viskoelastic material in the solid state into a trough containing a terminal element,
  • b) heating the viskoelastic material until it liquefies, and
  • c) cooling the viskoelastic material until it solidifies.
    • As a result of manufacturing the component with the aid of a viskoelastic material which is introduced into a trough in the solid state, in accordance with the invention, soiling of the regions adjacent to the trough is largely avoided, since it is much easier to apply the viskoelastic material with precise positioning in the solid state than in the liquid state.
    The invention will be explained in more detail below with reference to example embodiments and the associated figures:
  • Figure 1 shows an electrical component according to the invention, in diagrammatic cross-section; and
  • Figure 2 shows the header, forming a trough, of an electrical component with a terminal element arranged therein, in diagrammatic cross-section.
    • Figure 1 shows an electrical component having a header 1 and a functional unit 2. The header 1 may be for example of synthetic material. The functional unit 2 may be for example the electromagnetic drive system of a relay. Through a hole in the header 1 there projects a terminal element 3 which is secured to the header 1 for example by adhesion. A section of the terminal element 3 is encased in a viskoelastic material 4. The functional unit 2 is electrically and acoustically coupled to the terminal element 3 by means of a coupling element 5.
    Figure 2 shows a header 1 which is constructed to form a trough 7. A section 6 of the terminal element 3 is located in the trough 7 and projects through the header 1 onto the side of the header 1 opposite the trough 7. The functional unit (not illustrated in Figure 2) is located on the same side of the header 1 as the trough 7. Viskoelastic material 4 may be put into the trough 7, for example in liquid form, and subsequently cured.
    The invention is not restricted to the embodiments shown by way of example, but is defined in its most general form in Claim 1.

    Claims (10)

    1. An electrical component comprising a functional unit (2) which is secured to a header (1) and having terminal elements (3) which are mechanically secured to the header (1) and electrically and acoustically coupled to the functional unit (2) and which project through holes in the header (1) onto the side of the header (1) remote from the functional unit (2) and which have a modulus of elasticity of EA > 50 MPa, in which the terminal elements are partially encased in a viskoelastic material (4) having a modulus of elasticity of EW < 10 MPa.
    2. An electrical component according to Claim 1, in which EA > 100 MPa and EW < 1 MPa.
    3. An electrical component according to Claim 1 or 2, in which the viskoelastic material (4) is a casting compound of one-component or two-component synthetic material.
    4. An electrical component according to Claim 1 or 2, in which the viskoelastic material (4) is a thermoplastic.
    5. An electrical component according to Claim 4, in which a viskoelastic thermoplastic (4) is partially moulded around the terminal elements (3).
    6. An electrical component according to Claim 1 to 4, in which the terminal elements (3) are arranged in troughs (7) formed by the header (1), with part sections (6), and in which the volume contained between an inner wall of the trough and the corresponding terminal element (3) is at least partially filled with viskoelastic material (4).
    7. An electrical component according to Claim 1 to 6, in which the functional unit (2) is the magnet system of an electromagnetic relay.
    8. A process for manufacturing a component according to Claim 5, in which a viskoelastic thermoplastic (4) is moulded partially around the terminal elements (3).
    9. A process for manufacturing a component according to Claim 6, whereby a viskoelastic material (4) in the liquid state is poured into a trough (7) containing a terminal element (3) and then cured.
    10. A process for manufacturing a component according to Claim 6, comprising the following steps:
      a) introducing a viskoelastic material (4) in the solid state into a trough (7) containing a terminal element (3),
      b) heating the viskoelastic material (4) until it liquefies, and
      c) cooling the viskoelastic material (4) until it solidifies.
    EP20010105565 2000-03-08 2001-03-06 Electrical component and process for the manufacture thereof Expired - Lifetime EP1132935B1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    EP20010105565 EP1132935B1 (en) 2000-03-08 2001-03-06 Electrical component and process for the manufacture thereof

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    EP00104952 2000-03-08
    EP00104952 2000-03-08
    EP20010105565 EP1132935B1 (en) 2000-03-08 2001-03-06 Electrical component and process for the manufacture thereof

    Publications (3)

    Publication Number Publication Date
    EP1132935A2 true EP1132935A2 (en) 2001-09-12
    EP1132935A3 EP1132935A3 (en) 2003-06-04
    EP1132935B1 EP1132935B1 (en) 2006-08-23

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    ID=26070653

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP20010105565 Expired - Lifetime EP1132935B1 (en) 2000-03-08 2001-03-06 Electrical component and process for the manufacture thereof

    Country Status (1)

    Country Link
    EP (1) EP1132935B1 (en)

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPH079101Y2 (en) * 1988-08-10 1995-03-06 矢崎総業株式会社 Reed switch mounting structure for eddy current indicator
    FR2719716B1 (en) * 1994-05-05 1996-06-14 Otis Elevator Co Device for fixing relays and contactors on a support wall with reduced impact noise.
    JPH1027533A (en) * 1996-07-11 1998-01-27 Fujitsu Takamizawa Component Kk Electromagnetic relay
    DE19712958C1 (en) * 1997-03-27 1998-05-07 Kloeckner Moeller Gmbh Switch device

    Also Published As

    Publication number Publication date
    EP1132935B1 (en) 2006-08-23
    EP1132935A3 (en) 2003-06-04

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