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WO1997017817A1 - Equipement electronique support - Google Patents

Equipement electronique support Download PDF

Info

Publication number
WO1997017817A1
WO1997017817A1 PCT/GB1996/002720 GB9602720W WO9717817A1 WO 1997017817 A1 WO1997017817 A1 WO 1997017817A1 GB 9602720 W GB9602720 W GB 9602720W WO 9717817 A1 WO9717817 A1 WO 9717817A1
Authority
WO
WIPO (PCT)
Prior art keywords
support
base
supporting portion
ball
bearing
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.)
Ceased
Application number
PCT/GB1996/002720
Other languages
English (en)
Inventor
Yasuo Yamamura
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.)
YAMAMURA CHURCHILL Ltd
Original Assignee
YAMAMURA CHURCHILL Ltd
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 YAMAMURA CHURCHILL Ltd filed Critical YAMAMURA CHURCHILL Ltd
Publication of WO1997017817A1 publication Critical patent/WO1997017817A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/026—Supports for loudspeaker casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0052—Physically guiding or influencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/14—Ball joints; Spherical support elements

Definitions

  • This invention relates to supporting electronic equipment. More particularly but not exclusively the invention relates to a set of supports for, and a method of supporting, electronic equipment, such as loudspeakers.
  • the loudspeakers of hi-fi systems have been mounted in various manners.
  • loudspeakers should be mounted on stands which are relatively robust and solid. This provides for some fidelity of reproduction insofar as the loudspeaker stands are used to cut out undesirable resonant vibrations which are set up in the loudspeaker including its housing.
  • vibrations set up in solid material on which audio equipment is mounted can cause distortion of the output from the equipment because of the effects of the vibrations within the equipment.
  • the performance of loudspeakers themselves can be interfered with by resonant and other vibrations which can cause the loudspeaker output to be degraded.
  • Flexible supports such as rubber or air suspension can reduce the transmission of vibrations from a loudspeaker to the surrounding solid environment.
  • a flexible mounting provides a speaker with excessive freedom of vibration. Vibrational degrees of freedom are provided in the form of three linear movements along the x, y and z axes and the three rotational modes of vibration around each of these three axes. Interference between vibrations operating in these six degrees of freedom produces further vibrational modes.
  • flexible mountings allow a loudspeaker and its housing to resonate at a large number of resonant frequencies and the performance of the loudspeaker is degraded.
  • United States patent 5,253,841 describes apparatus for supporting a printing apparatus which is intended to isolate vibrations caused by lateral movement of the printing head from other associated instruments. Rollers are attached to the base of the printing apparatus and are mounted to reciprocate on arcuate guide grooves. Thus, in use the movement of the printing apparatus provided by the rollers has both horizontal and vertical components.
  • a method of mounting electronic equipment comprising providing a support comprising a base and an upper supporting portion on which the electronic equipment is mounted, allowing said upper supporting portion to vibrate freely with respect to said base, and limiting said free vibrations substantially within a horizontal plane, thereby isolating horizontal vibrations created in the electronic equipment from the base.
  • the free horizontal vibrations of the upper supporting portion with respect to the base are limited substantially within a linear direction. This isolates vibrations created in the equipment in the same direction, whilst inhibiting the creation of multidirectional nodes of vibration whereby resonance of the equipment could occur.
  • the allowed linear direction of free vibration is preferably aligned with that main direction of vibration of the equipment.
  • the supporting portion may be allowed to vibrate freely with respect to the base in different horizontal directions.
  • a support for electronic equipment comprising a base and a free-standing supporting upper portion mounted on the base by a ball-bearing constrained to roll freely substantially within a horizontal plane, thereby isolating horizontal vibrations created in the electronic equipment from the base.
  • Fig. 1 is a perspective view of a set of supports embodying the present invention
  • Fig. 2 is a plan view of a portion of a loudspeaker supported by the set of supports illustrated in Fig. 1;
  • Fig. 3 is an exploded perspective view of one of the supports shown in Fig. 1;
  • Fig. 4 is an exploded perspective view of another of the supports illustrated in Fig. 1;
  • Fig. 5 is a perspective view of a support according to a further embodiment of the invention.
  • Fig. 6 is a side view of the support shown in
  • Fig. 7 is an exploded perspective view of the support shown in Figs. 5 and 6;
  • Fig. 8 is a perspective view of a support according to a further embodiment of the invention.
  • Fig. 9 is a sectional view across line A-A in Fig. 8;
  • Fig. 10 is a perspective view of a support according to a yet further embodiment of the invention.
  • Figs. 11 and 12 are sectional views across lines B-B and C-C respectively in Fig. 10.
  • a set of supports embodying the invention comprises a linear bearing support 2 (which allows low-friction motion in a linear horizontal direction only) and two planar bearing supports 4 (which allow motion in any direction in a horizontal plane) .
  • the supports can be arranged in various manners in order to provide support to audio equipment as required. There is however a preferred manner of arrangement in which the supports are arranged relative to one another as shown in Fig. 2.
  • a loudspeaker 6 is placed upon the supports 2 and 4 when they are arranged in a triangular array, with the linear bearing support 2 supporting the front 8 of the loudspeaker and the planar bearing supports 4 supporting the rear of the loudspeaker.
  • the linear bearing support 2 which has a circular wooden or steel base 10 and a circular wooden or steel top 12.
  • Two ball-bearings 14 and 16 are borne between the base 10 and the top 12.
  • the ball-bearings may typically have a diameter of 7mm, although ball-bearings of any suitable diameter may of course be used.
  • the ball-bearings 14 and 16 move along a linear path defined by triangular grooves 18 and 20 in the base and top respectively.
  • the body of the base and top may be formed of wood, steel or other rigid material
  • groove 18 is preferably defined by a metal such as steel.
  • Groove 20 is also similarly defined.
  • the ball-bearings 14 and 16 are constrained to travel only short distances within the grooves 18 and 20 by means of central stops 22 and 24 located in the middle of the grooves, and end stops 26 and 28 located at the ends of the grooves. The ball-bearings 14 and 16 are thus located towards the outer periphery of the support 2 to provide even balance in use.
  • a metal rod 30 of small diameter is located in a shallow groove on the lower surface of the base 10, such that when the base is level (as it should be in use) , the metal rod 30 fully supports the base when placed on a flat horizontal surface.
  • the rod 30 may typically have a diameter of 2mm although of course a rod of any suitable diameter may be used.
  • the rod 30 is disposed at right angles to the groove 18.
  • each of the planar bearing supports 4 comprise a top 32, a middle portion 34 and a base 36.
  • the top 32 consists of a circular metal disc 38 and a metal annular ring 40 bonded concentrically to the base of the disc 38.
  • the annular ring 40 therefore defines a circular flange against which a ball-bearing 42, held between the top 32 and the middle portion 34, abuts.
  • the middle portion consists of a circular body 44 which may be made of wood or steel and has a cylindrical hollow 46 on its upper surface.
  • a metal annular ring 50 is located within the hollow 46.
  • a metal plate 52 is located beneath the annular ring 50.
  • a lower circular flange against which the ball ⁇ bearing 42 abuts is defined by the annular ring 50.
  • the base 36 has a circular foot 54 and an upstanding threaded member 56 which threadingly engages with a bore 58 located on the underside of the middle portion 34.
  • the height of the support 4 is adjustable by rotation of the middle portion 34 with respect to the box 36.
  • the supports When assembled, the supports appear as shown in Fig. 1. Furthermore, when used to support a speaker, the grooves 18 and 20 are aligned as illustrated in Fig. 2 to allow the loudspeaker a freedom of movement which is parallel to the direction of vibration of the loudspeaker membrane (hereinafter referred to as the x-axis) . Because the ball-bearings 14 and 16 in the grooves 18 and 20 and the ball-bearings 42 of the supports 4 in the annular rings 40 and 50 offer a low- friction motion, the loudspeaker is effectively entirely free to move along the x-axis, i.e. backwards and forwards. This movement is of course within the constraints of the length of the groove portions in which the ball-bearings 14 and 16 move and the diameter of the inner flanges of the rings 40 and 50.
  • the x-axis vibrations produced by the loudspeaker are isolated by the supports 2 and 4 and are not transmitted from the loudspeaker 6 via the supports 2 and 4 to the floor or other surface on which the loudspeaker is mounted.
  • the use of ball ⁇ bearings within the support reduces the contact between the upper and lower portions substantially to a point, which further reduces the scope for transmission of horizontal vibrations between the loudspeaker 6 and its surroundings.
  • the rod 30 reduces the transmission of rotational vibrations in the direction of the x-axis by providing a rotational degree of freedom about an axis substantially horizontal and perpendicular to the x- axis (hereinafter referred to as the y-axis) .
  • bearing supports need not be constrained to move only linearly.
  • An arrangement which allows low-friction motion along both the x-axis and the y-axis may be employed.
  • a third embodiment of support as illustrated in Figs. 5-7 might be utilised, preferably in a set of supports.
  • the support illustrated will be referred to herein as an x, y bearing support 60.
  • the x, y bearing support consists of a lower steel plate 62, a middle steel plate 64 and an upper steel plate 66.
  • Middle plate 64 is mounted above lower plate 62 in a similar fashion to the mounting of top 12 with respective base 10 of the embodiment shown in Figs. 1- 3.
  • the middle plate is free to move in the x direction.
  • Triangular grooves 68 are formed coaxially along a line disposed parallel to the x axis in the upper surface of lower plate 62, and corresponding triangular grooves 70 are formed in the lower surface of middle plate 64.
  • Top plate 66 is free to move in the y direction with respect to middle plate 64 by means of a similar mounting.
  • Triangular grooves 74 are formed coaxially along a line parallel to the y axis in the upper surface of middle plate 64.
  • Corresponding triangular grooves 76 are formed in the lower surface of upper plate 66.
  • Ball-bearings 78 move freely, ie without significant frictional resistance, within grooves 74 and 76.
  • a retaining shaft 80 is fixed in the centre of middle plate 64, protruding from both its upper and lower surfaces.
  • a threaded bore is formed in each end of the retaining shaft.
  • An elongate aperture 82 is formed in lower plate 62 extending coaxially with grooves 68 and parallel to the x axis.
  • an elongate aperture 84 is formed in the upper plate 66, coaxially with grooves 76 and extending in a direction parallel to the y axis.
  • a screw 86 extends through the aperture S2 and engages with retaining shaft 30.
  • Aperture 82 is sufficiently wide to allow middle plate 64 to move freely with respect to lower plate 62, whilst keeping the two plates together.
  • a retaining screw 88 passes through aperture 84 and engages with the bore formed in the other end of the retaining shaft 80 to loosely attach the upper plate 66 to the middle plate 64.
  • the aperture 84 may be covered by a cap (not shown) .
  • the x, y bearing support 60 enables vibrations of equipment supported on the support to be isolated from the supporting surfaces.
  • the bearing formed between the upper plate 66 and the middle plate 64 isolates the resolved components of vibrations occurring parallel to the y axis from the supporting surfaces, whereas the x-axis resolved components of vibrations are individually isolated by the bearing formed between the middle plate 64 and the lower plate 62.
  • Figs. 8 and 9 illustrate a support 90 according to a further embodiment of the invention, and which is also preferably used in a set.
  • the support 90 operates in generally the same fashion as the linear bearing support 2 previously described.
  • the support 90 consists of two opposed metal plates 92 and 94, which are press-formed to produce triangular- section channels 96, 98, 100 and 102 within which two ball-bearings 104 and 106 are constrained.
  • the lower plate 94 is provided with a threaded bore 108 in a central position, and the upper plate 92 has a correspondingly located elongated aperture 110 along which a fixing screw 112 is constrained to move.
  • Each of the channels 96-102 and the elongated aperture 110 are aligned along the main axis of the support 90.
  • the ball-bearings 104, 106 maintain a gap between the upper and lower plates 92, 94, and the horizontal rolling movement of the ball-bearings within the channels provides for a low-friction vibrational movement of the upper plate 92 with respect to the lower plate 94 only along the main axis of the support 90.
  • the support 90 may be used in a fashion similar to the manner in which the linear bearing support 2 is used.
  • the linear bearing support 90 is also provided with lateral support pads 114, 116, 118 and 120, which are adhered to the metal plates adjacent to the triangular channels 96-102.
  • the support pads 114-120 are of a thickness which is approximately equal to the height via which the channels 96-112 protrude from the metal plates 92, 94, such that when electronic equipment is placed on the support 90, the base of the equipment and the supporting surface contact both the tops of the triangular grooves and the pads 114-120 at the upper and lower surfaces of the support 90.
  • the pads 114-120 are formed of a slightly compressible material, such that most of the weight of the equipment is supported on the horizontal lines defined by the ridges of the triangular channels 96- 102. This serves to reduce the transmission of vibrations through the support in a manner similar to that of the metal rod 30 described in relation to the linear bearing support 2.
  • Figs. 10 to 12 illustrate a support 122 in accordance with a further embodiment of the invention, also preferably used in a set.
  • the support 122 is generally similar to the x, y bearing support 60 described in relation to Figs. 5 to 7, except modified in a similar manner to the support 90 described in relation to Figs. 3 and 9.
  • the x, y bearing support 122 has upper, middle and lower thin metal plates 124, 126, 128 in which triangular bearing grooves are formed by pressing, but which are otherwise generally similar to plates 62, 64 and 66 of the x, y bearing 60.
  • the x, y bearing support 122 is also provided with support pads 130, 132, 134 and 1 3 6 which are essentially similar to the support pads 1 1 4- 120 of the embodiment described in relation to Figs. 8 and 9.
  • supports as described which allow low-friction motion in both the x-direction (backwards and forwards) and the y-direction (side to side) could be advantageously utilised.
  • Other equipment which could benefit from the use of supports according to the present invention include record turntables, CD players, televisions, other audio, or audio-visual equipment, and CD-ROM drives and other computing equipment.
  • any electronic equipment which produces unwanted vibrations, in particular those having small amplitudes and at least audio frequencies, which would otherwise degrade its performance, and which may be transmitted to other equipment could benefit from the use of supports in accordance with this invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Signal Processing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

Support pour équipement audio, dont la partie support supérieure est fixée sur une base par l'intermédiaire de roulements à billes contenant un roulement à frottement réduit. Le roulement à frottement réduit tolère les vibrations propres de la partie support supérieure, et par conséquent de l'équipement fixé sur celle-ci, dans un sens horizontal, ce qui isole les vibrations horizontales générées dans l'équipement audio par de la base du support.
PCT/GB1996/002720 1995-11-06 1996-11-06 Equipement electronique support Ceased WO1997017817A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9522691A GB2307024B (en) 1995-11-06 1995-11-06 A method of mounting a loudspeaker
GB9522691.6 1995-11-06

Publications (1)

Publication Number Publication Date
WO1997017817A1 true WO1997017817A1 (fr) 1997-05-15

Family

ID=10783451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002720 Ceased WO1997017817A1 (fr) 1995-11-06 1996-11-06 Equipement electronique support

Country Status (2)

Country Link
GB (1) GB2307024B (fr)
WO (1) WO1997017817A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103211528A (zh) * 2009-11-21 2013-07-24 德国福维克控股公司 用于台式厨房设备的支脚
US10187712B2 (en) * 2015-05-13 2019-01-22 Michael P. Latvis, Jr. Energy dissipation devices

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2857064B1 (fr) * 2003-07-02 2006-12-22 Marc Meyer Dispositif de decouplage mecanique pour appareils haute-fidelite
US7743882B2 (en) * 2003-08-18 2010-06-29 Vinh Thanh Vu Vibration-control platform
CN110469626B (zh) * 2019-01-09 2021-08-27 辽宁同泽减震器有限公司 一种电气机柜用径向正交阻尼分别可调侧挂减振器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2102645A5 (fr) * 1970-08-13 1972-04-07 Pineau Andre
EP0520385A2 (fr) * 1991-06-24 1992-12-30 Dieter Pladwig Dispositif de haut-parleurs
WO1994005928A1 (fr) * 1992-09-05 1994-03-17 Josef Hoffmann Dispositif a assemblage elastique

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL59740A0 (en) * 1980-03-31 1980-06-30 Popper Eng Ltd Electromagnetic vibrating system operable at high amplitudes
GB2102533B (en) * 1981-07-16 1984-09-26 Marconi Co Ltd Buffer assemblies
BE897066A (fr) * 1983-06-16 1983-10-17 Staar Sa Dispositif destine a soustraire un appareil de lecture et/ou d'enregistrement a l'influence des sollicitations mecaniques
AT392321B (de) * 1986-10-16 1991-03-11 Alfit Gmbh Beschlag fuer mit schwenk-schiebetueren ausgestattete kastenmoebel u. dgl.
FR2618361A1 (fr) * 1987-07-22 1989-01-27 Somex Sa Machine-outil comportant un bati et un chariot de translation
US5253841A (en) * 1989-06-21 1993-10-19 Sanwa Supply Co., Ltd. Printer vibration isolating apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2102645A5 (fr) * 1970-08-13 1972-04-07 Pineau Andre
EP0520385A2 (fr) * 1991-06-24 1992-12-30 Dieter Pladwig Dispositif de haut-parleurs
WO1994005928A1 (fr) * 1992-09-05 1994-03-17 Josef Hoffmann Dispositif a assemblage elastique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103211528A (zh) * 2009-11-21 2013-07-24 德国福维克控股公司 用于台式厨房设备的支脚
CN103211528B (zh) * 2009-11-21 2015-06-24 德国福维克控股公司 用于台式厨房设备的支脚
US10187712B2 (en) * 2015-05-13 2019-01-22 Michael P. Latvis, Jr. Energy dissipation devices

Also Published As

Publication number Publication date
GB2307024A (en) 1997-05-14
GB9522691D0 (en) 1996-01-10
GB2307024B (en) 2000-03-01

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