WO2010035123A2 - Klaxon électronique pour véhicule - Google Patents

Klaxon électronique pour véhicule Download PDF

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Publication number
WO2010035123A2
WO2010035123A2 PCT/IB2009/006968 IB2009006968W WO2010035123A2 WO 2010035123 A2 WO2010035123 A2 WO 2010035123A2 IB 2009006968 W IB2009006968 W IB 2009006968W WO 2010035123 A2 WO2010035123 A2 WO 2010035123A2
Authority
WO
WIPO (PCT)
Prior art keywords
chip
circuit
diaphragm
electronic
horn
Prior art date
Application number
PCT/IB2009/006968
Other languages
English (en)
Other versions
WO2010035123A3 (fr
Inventor
Hari Prakash
Ashok Kumar
Sudhir Dahiya
Original Assignee
Gerres, Stephan
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 Gerres, Stephan filed Critical Gerres, Stephan
Priority to EP09745102A priority Critical patent/EP2342709A2/fr
Publication of WO2010035123A2 publication Critical patent/WO2010035123A2/fr
Publication of WO2010035123A3 publication Critical patent/WO2010035123A3/fr

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means

Definitions

  • This invention relates to an electronic horn for a vehicle.
  • this invention relates to an electronic horn having a chip on board (COB) circuit for contactless switching protected against surges and high vibration environment.
  • COB chip on board
  • Conventional horns used in automotive vehicles have a vibrating diaphragm driven by an electromagnetic device.
  • the said electromagnetic device is a coil driven by current pulses.
  • Current pulses are developed by a mechanical switch such as a circuit breaker wherein such switch would energize a magnetic coil to cause the diaphragm movement.
  • Diaphragm movement during its travel would open the switch, allowing the diaphragm to return in the reverse direction due to the elastic energy accumulated in the diaphragm thus closing the switch again.
  • Switching and corresponding movement of the diaphragm causes the cycle to repeat at a particular frequency equal to the fundamental frequency which can be adjusted by a screw.
  • Objects of the invention It is an object of the invention to provide an electronic horn with surge protected contactless switching system such that the life cycle of the horn is increased and its operation is simplified.
  • an electronic horn for a vehicle comprising a housing sub-assembly; a diaphragm sub-assembly and a chip on board circuit riveted to a terminal block outside the housing.
  • the said chip on board circuit having clipping means for eliminating surge voltages.
  • Figure 1 illustrates a schematic circuit diagram of a solid state energizing circuit on a printed circuit board of the prior art.
  • Figure 2 illustrates a cross sectional view of the housing sub assembly for an electronic horn according to the present invention.
  • Figure 3 illustrates a cross sectional view of electronic block sub assembly according to the present invention.
  • Figure 4 illustrates a cross sectional view of the diaphragm sub assembly for disc type electronic horn according to one embodiment of the present invention.
  • Figure 5 illustrates a cross sectional view of the diaphragm sub assembly for trumpet type electronic horn according to one embodiment of the present invention.
  • Figure 6 illustrates a block diagram of the chip on board circuit of the electronic horn according to the present invention.
  • the present invention provides an electronic horn.
  • the electronic horn according to the present invention is now described in detail with reference to the accompanying drawings, wherein reference numerals used in the accompanying drawings correspond to the like elements throughout the description.
  • Figure 1 illustrates a schematic circuit diagram of a solid state energizing circuit on a printed circuit board of the prior art.
  • a power supply is provided through a battery to a voltage regulator.
  • Output from the said voltage regulator is further coupled to a timer through a limiting resistor for generating a pulse wave having frequency similar to the resonance frequency.
  • the timer is connected to an adjustable resistor for varying the timer output frequency as well as the duty cycle.
  • Output of the timer is further connected to a switching device, which is a MOSFET having its source connected to the ground and its drain is coupled to the coil.
  • Positive terminal of the power supply is further connected to the other end of the coil.
  • FIG. 2 illustrates a cross sectional view of the housing sub assembly (101) for an electronic horn according to the present invention.
  • the housing sub- assembly (101) comprises a cup shaped housing (102) and a coil body assembly (116).
  • the cup shaped housing (102) is made of metal or plastic casing to protect inner components which are safely secured inside the housing (102) from being damaged.
  • the housing (102) is stepped to define a small closed end portion (106) comprising an end wall (108) and a larger open end portion (110) terminating in a radial flange (112).
  • the small end portion (106) and the larger end portion (110) are connected by means of an intermediate section, such as a planar annular portion (114).
  • the coil body assembly (116) is provided for mounting an energizing coil (129) which generates a magnetic field inside the housing (102).
  • the coil body assembly (116) is engaged with the housing (102) by rivets (122) through the apertures (not shown) provided in the annular portion (114) and the coil body assembly (116).
  • the rivets (122) through the coil body assembly (116) and the housing (102) are also connected to an electronic block sub-assembly (not shown) having a chip on board circuit (not shown) placed inside a terminal block (130).
  • the chip on board circuit (not shown) is placed inside a metal casing (not shown) to protect the chip from being damaged.
  • the chip on board circuit (not shown) may be in any form, however an arc shaped chip on board fits easily above the annular portion, (114) of the said housing (102).
  • the casing (not shown) and said terminal block (130) are also provided with a similar shape as that of the chip on board, so that said chip on board is placed properly inside the terminal block (130).
  • the casing (not shown) may be plastic or metal casing made of non heat dissipating material so that the heat generated in the housing due to reciprocating movement of the diaphragm is not transmitted to the chip on board circuit (not shown) inside the metal casing (not shown) .
  • the rivets (122) are basically mechanical fasteners having a factory head and a buck tail. Different types of rivets may be used for the fastening purpose such as solid rivets, blind rivets, multi grip rivets, grooved rivets, peel type blind rivets, self pierce rivets, plastic rivets, tubular rivets and the like.
  • the rivets (122) provide better fastening between the housing and the chip on board circuit (not shown) placed inside a metal casing (not shown) compared to click fitted PCB used in the prior art where the click fitted PCB used to fail during conditions of high vibrations associated with the vehicles.
  • the terminal block (130) has shape similar to that of the chip on board circuit (not shown) and provides covering to the chip on board circuit (not shown).
  • the terminal block (130) receives the rivets (122) through the chip on board circuit (not shown) and has terminals (142) to connect an external power supply (not shown) through a battery, to the chip on board circuit (not shown) inside the metal casing (not shown) .
  • An aperture (not shown) in the end wall (108) of the housing holds an anchor bolt (126) which extends towards the coil body assembly (116).
  • One end of the anchor bolt (126) receives the coil body assembly (116) and the opposite end of the anchor bolt (126) is threaded to receive a mounting bracket (128).
  • the mounting bracket (128) is further secured with a securing nut (134) so as to connect the said housing to the vehicle body.
  • the anchor bolt securely connects the said mounting bracket with the vehicle so that vibrations associated with the vehicles do not affect the secured connection between the housing (102) and the mounting bracket (128).
  • the coil body assembly (116) of the housing sub assembly (101) has an energizing coil (129) , which is secured inside the cup-shaped housing (102) by means of said rivets (122) connected through the apertures (not shown) inside the coil body assembly (116) and the cup- shaped housing (102).
  • the energizing coil (129) is made up of a conductor such as a solid copper wire or the like and wound around a core to form an inductor or electromagnet.
  • the coil (129) is further coated with varnish or wrapped with an insulating tape to provide insulation and to secure the wire in place.
  • Said coil (129) acts as an electromagnetic driver when current is passed through it and is connected to the output of the chip on board circuit (not shown).
  • FIG. 3 illustrates a cross sectional view of the electronic block sub assembly (140) according to the present invention.
  • the electronic block sub assembly (140) comprises of a terminal block (130) placed above the COB (132) and covering the said chip on board (132) placed inside a metal casing (133), so as , to protect the COB (132) from getting damaged.
  • the chip on board circuit is (132) placed inside the metal casing (133) and upon the planar annular portion (114) which interconnects the smaller end portion (108) and the larger portion (110) of the housing (102).
  • the chip on board circuit (132) comprises of a printed circuit board (PCB) (180) having an embedded chip (182) like a layer of chip wafer.
  • the chip on board also comprises of, linear elements like resistors and non-linear elements like junction diodes mounted on it.
  • the PCB (180) along with other elements mounted on it are further placed inside a metal or plastic casing (133) which does not dissipate heat and thus does not allow the characteristics of electronic components to vary with changes in the temperature.
  • the terminal block (130) and the chip on board circuit (132) are connected to each other and the housing by means of rivets (122) through apertures (138) in the terminal block (130) and chip on board circuit (132).
  • the chip on board circuit (132) comprises of a solid state switching circuit which is provided inside an electronic circuit casing (133) and is located outside the cup-shaped housing (102).
  • the electronic circuit casing (133) may be of any form, nevertheless, in general the casing (133) has the shape of an arc which : easily fits on the planar annular portion (114) of the housing inside the
  • terminal block (130) is made of plastic or metallic material which does not allow the heat produced inside the housing to dissipate to the chip on board circuit (132) and prevents heating of the riveted, casing (133) from the heat generated inside the housing (102) thus preventing damage and malfunction of said electronic circuit.
  • the terminal block (130) comprises of terminals (142) connecting an external power supply (not shown) to provide desired electric current to the chip on board circuit (132) which is further connected to said energizing coil (129).
  • the chip on board circuit (132) provides an electrical output to the energizing coil (129) mounted on the coil body assembly (116) thereby magnetizing the energizing coil (129). Riveting of the said chip on board circuit (132) inside the metal casing (133) with the housing (102) increases the life of horn by reducing failure from dislocation of the chip on board and loosening of connections between different components of the chip on board during jerks and vibrations in the vehicle.
  • FIG. 4 illustrates a cross sectional view of the diaphragm sub assembly for disc type electronic horn according to one embodiment of the present invention.
  • a diaphragm sub-assembly (151) comprises a diaphragm (150) made of a resilient metal with good elastic properties and an armature (152).
  • the diaphragm (150) is made of a material such that when the coil (129) is energized by passing current through it, a magnetic field is generated around the coil (129) which pulls the diaphragm (150) and the armature (152) towards the energizing coil (129).
  • the armature (152) is riveted to the diaphragm (150) along with a resonator plate or an oscillator (154).
  • the diaphragm (150) is clamped to the periphery of the radial flange (112) in the cup shaped housing (102).
  • the resonator plate or the oscillator (154) is further secured to the second sub assembly by a nut (156) with a cap cover (158).
  • Said oscillator (154) is responsible for producing metallic sound inside the disc horn and this metallic beep sound distinguishes disc horns from other horns.
  • the housing sub-assembly (101) is then assembled together with the diaphragm assembly (151) by a sealing ring (168).
  • the electromagnet is excited again by the chip on board circuit (132) in the same manner leading the diaphragm (150) to commence a new oscillation cycle at the same frequency as that of resonance frequency of the electronic chip on board circuit (132).
  • the switching action in the system is completed by chip on board circuit (132) which results in reciprocating movement of diaphragm (150) along with the oscillator (154) resulting in sound generation by the horn.
  • FIG. 5 shows a cross sectional view of the diaphragm sub assembly for trumpet type electronic horn according to another embodiment of the present invention.
  • Diaphragm sub-assembly (151 1 ) comprises a metal diaphragm (150 5 ) and an armature (152*).
  • the armature (152*) is connected to the diaphragm (150*) by riveting it to the diaphragm (150% Metal diaphragm is clamped to the periphery of the radial flange (112) in the housing (102).
  • a packing disc (170*) is provided for better packing between the disc plate (160*) and the diaphragm (150") so that the air pressure generated inside the diaphragm assembly (151") is not released and is fully transferred through the disc plate (160") to projectors (172 1 J for obtaining maximum sound output.
  • the disc plate (16O 1 ) has an aperture (not shown) in the centre to transmit the pressure produced inside the diaphragm assembly (151 s ) due to reciprocating movement of the diaphragm (150*) to the projectors (172 5 ).
  • dimensions of the projectors (172" are varied accordingly.
  • FIG. 6 is a block diagram of the chip on board circuit of the electronic horn according to one embodiment of the present invention.
  • the chip on board circuit (132) may be used in different types of horns available and need not be limited to electronic horn comprising a switching circuit (602) coupled to a battery (600) for providing switching action.
  • Switching circuit (602) provides a pulse train having frequency similar to the resonance frequency of the diaphragm assembly to a driver circuit (604).
  • Switching circuit (602) has a clipping circuit (606) having a clipping means for completely clipping surge voltages which are generated in high frequency inductive coil circuits. Either a series or shunt clipper can be used as a clipping circuit. Normally a resistor in combination with a diode is used but such circuit does not provide proper protection to the entire electronic circuit components from the surge voltages
  • present invention clipping means is a transil diode connected in the clipping; circuit (606) to provide better clipping.
  • the clipping circuit (606) has the transal : diode which totally eliminates surge voltage generated due to inductive loading : v and provides better protection to the electronic circuit components from damage and malfunction.
  • the clipping circuit (606) is further connected to a ; timer in the switching circuit (602) for outputting pulse train having frequency > similar to the resonance frequency of the diaphragm assembly.
  • timer circuit is normally an IC 55S or IC556 or an operational amplifier.
  • Output from the timer is coupled to a switching means to provide switching at a frequency similar to the resonance frequency of the electromechanical system.
  • switching means may be a Metal Oxide-Semiconductor Field Effect Transistor (MOSFET) connected to the driving circuit.
  • Output of the switching circuit (602) is provided to the driver circuit (604), wherein the driver ! ⁇ circuit (604) comprises of an energizing coil mounted on the coil body assembly , of the horn and an electromagnetic means for energizing the coil (129)., '
  • the energizing c ⁇ (129) mounted on the coil body assembly is energized by electromagnetic means by passing current through the coil (129). The current thereby produces a magnetic field around the coil which pulls the diaphragm towards the coil ! (129).
  • the coil body assembly (116) and the anchor bolt (126) get magnetized simultaneously upon being energized by electric current and thereby puffing

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L’invention concerne un klaxon électronique pour véhicule comprenant un sous-ensemble boîtier et un sous-ensemble membrane. Une puce disposée sur une carte de circuit imprimé est rivée à un bloc terminal extérieur au boîtier, et est dotée de moyens d’écrêtage pour éliminer les surtensions.
PCT/IB2009/006968 2008-09-26 2009-09-25 Klaxon électronique pour véhicule WO2010035123A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09745102A EP2342709A2 (fr) 2008-09-26 2009-09-25 Klaxon électronique pour véhicule

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2269/DEL/2008 2008-09-26
IN2269DE2008 2008-09-26

Publications (2)

Publication Number Publication Date
WO2010035123A2 true WO2010035123A2 (fr) 2010-04-01
WO2010035123A3 WO2010035123A3 (fr) 2011-01-20

Family

ID=42060173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/006968 WO2010035123A2 (fr) 2008-09-26 2009-09-25 Klaxon électronique pour véhicule

Country Status (2)

Country Link
EP (1) EP2342709A2 (fr)
WO (1) WO2010035123A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102413404A (zh) * 2011-12-05 2012-04-11 哈尔滨固泰电子有限责任公司 无触点电子喇叭电源隔离供电电路及其隔离供电方法
FR2980615A1 (fr) * 2011-09-28 2013-03-29 Delphi Tech Inc Sirene comportant un systeme de connexion ameliore
WO2014151827A2 (fr) * 2013-03-15 2014-09-25 Sanjiv Patel Avertisseur et dispositif sonores électroniques sans contact
CN104494513A (zh) * 2014-12-30 2015-04-08 哈尔滨固泰电子有限责任公司 拉铆螺杆连接的新型喇叭及进行拉铆紧固的方法
WO2015167572A1 (fr) 2014-05-01 2015-11-05 Sanjiv Patel Avertisseur et dispositif sonores électroniques sans contact

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1566373A (en) * 1977-01-21 1980-04-30 Star Mfg Co Buzzer with electronic integrated oscillation circuit
US6819227B2 (en) * 2001-02-01 2004-11-16 Infineon Technologies Ag Acoustic signal generator, and method for generating an acoustic signal
WO2005069678A1 (fr) * 2004-01-16 2005-07-28 Yamaguchi Electrical Ind. Co.Limited Avertisseur sonore
WO2007076666A1 (fr) * 2005-12-30 2007-07-12 Hongwei Zhao Avertisseur electronique adaptatif intelligent
FR2910733A1 (fr) * 2006-12-26 2008-06-27 Renault Sas Dispositif de protection anti-surtension

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1566373A (en) * 1977-01-21 1980-04-30 Star Mfg Co Buzzer with electronic integrated oscillation circuit
US6819227B2 (en) * 2001-02-01 2004-11-16 Infineon Technologies Ag Acoustic signal generator, and method for generating an acoustic signal
WO2005069678A1 (fr) * 2004-01-16 2005-07-28 Yamaguchi Electrical Ind. Co.Limited Avertisseur sonore
WO2007076666A1 (fr) * 2005-12-30 2007-07-12 Hongwei Zhao Avertisseur electronique adaptatif intelligent
FR2910733A1 (fr) * 2006-12-26 2008-06-27 Renault Sas Dispositif de protection anti-surtension

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2980615A1 (fr) * 2011-09-28 2013-03-29 Delphi Tech Inc Sirene comportant un systeme de connexion ameliore
WO2013045343A1 (fr) * 2011-09-28 2013-04-04 Delphi Technologies, Inc. Sirene comportant un systeme de connexion ameliore
CN103826936A (zh) * 2011-09-28 2014-05-28 德尔菲技术公司 包括改进的连接系统的警报器
CN102413404A (zh) * 2011-12-05 2012-04-11 哈尔滨固泰电子有限责任公司 无触点电子喇叭电源隔离供电电路及其隔离供电方法
WO2014151827A2 (fr) * 2013-03-15 2014-09-25 Sanjiv Patel Avertisseur et dispositif sonores électroniques sans contact
WO2014151827A3 (fr) * 2013-03-15 2014-11-27 Sanjiv Patel Avertisseur et dispositif sonores électroniques sans contact
WO2015167572A1 (fr) 2014-05-01 2015-11-05 Sanjiv Patel Avertisseur et dispositif sonores électroniques sans contact
CN106232426A (zh) * 2014-05-01 2016-12-14 桑吉夫·帕特尔 电子非接触式喇叭和声音装置
EP3105081A4 (fr) * 2014-05-01 2017-10-04 Sanjiv Patel Avertisseur et dispositif sonores électroniques sans contact
US10086653B2 (en) 2014-05-01 2018-10-02 Patel Sanjiv Electronic contactless horn and sound device
CN104494513A (zh) * 2014-12-30 2015-04-08 哈尔滨固泰电子有限责任公司 拉铆螺杆连接的新型喇叭及进行拉铆紧固的方法

Also Published As

Publication number Publication date
WO2010035123A3 (fr) 2011-01-20
EP2342709A2 (fr) 2011-07-13

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