WO2001080261A1 - Mejoras introducidas en el objeto de la patente n° 9802346 por interruptor de red para televisor con desconexion degaussing - Google Patents
Mejoras introducidas en el objeto de la patente n° 9802346 por interruptor de red para televisor con desconexion degaussing Download PDFInfo
- Publication number
- WO2001080261A1 WO2001080261A1 PCT/ES2001/000026 ES0100026W WO0180261A1 WO 2001080261 A1 WO2001080261 A1 WO 2001080261A1 ES 0100026 W ES0100026 W ES 0100026W WO 0180261 A1 WO0180261 A1 WO 0180261A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- switch
- button
- disconnection
- network switch
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/20—Driving mechanisms
- H01H13/24—Driving mechanisms with means for introducing a predetermined time delay
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/16—Picture reproducers using cathode ray tubes
- H04N9/29—Picture reproducers using cathode ray tubes using demagnetisation or compensation of external magnetic fields
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
Definitions
- the image tube used in television sets and other similar devices is usually a cathode ray tube of electromagnetic bending.
- the cathode ray tube consists essentially of an electron cannon capable of generating a thin electronic beam, a deflector system and a screen ... covered by . a thin layer of a luminescent substance.
- the deflector system which can be electrostatic or magnetic in nature, is intended to deflect the electronic beam generated in the tube by hitting a luminescent screen producing visible images. Regardless of the nature of the baffle system, it comprises two pairs of baffle plates: one pair for vertical deflection and the other pair for horizontal deflection.
- the combined deflector system can direct the beam towards any point of the screen and even carry out a periodic scan of the entire surface of the screen.
- the cathode ray tubes in addition to being used as oscilloscopes, form the basis of television receiving devices.
- the flexion or barrel unit located at the back works by means of a lightning system electronic with cathodes of rapid heating, surrounded by some deflector coils that surround said cannon.
- a demagnetizing circuit consisting of a demagnetizing coil that is mounted on the back of the cathode ray tube and a PTC resistor.
- This demagnetizing circuit serves to demagnetize the image tube at the time of connection of the device through the main switch, arranging it in optimal conditions for its operation causing a "zeroing" of the same when it is turned on.
- the demagnetizing circuit in this sense, it is understood as a transitory of the demagnetizing circuit the time from the moment of connection, in which an intensity is reached between 10 to 15 amps, up to 300 milliseconds later (equivalent to 15 complete cycles of a sinusoid of 50 Hz alternating current) in which the intensity drops in the order of milliamps in the last cycle.
- This time is considered to be sufficient for the coil to completely demagnetize the cathode ray tube.
- the stationary term of the demagnetizing circuit corresponds to the rest of the time (from 300 s onwards) elapsed after the demagnetization of the tube. This time includes the image and stand-by operation of the device.
- the disconnect of the demagnetizing circuit referred to in the main patent No. 9802346 is the switch through which the demagnetization circuit is disconnected.
- Said auxiliary switch is conveniently designed for open the circuit at least 300 ms after the mains switch has connected the device (at which time the intensity in the demagnetizing circuit is generally of the order of milliamps).
- the auxiliary switch performs a delay of at least 300 milliseconds regardless of the speed of the operation of the switch performed by the user.
- the delay of the auxiliary switch can be carried out, according to the main patent, through mechanical means taking advantage of the energy provided by the user at the moment when he presses the button of the main switch to turn on the apparatus.
- the auxiliary switch integrated in the network switch incorporates mechanical means that allow the opening of the demagnetizing circuit in a delayed way when closing the main circuit.
- Said mechanical means are formed by a combination of sprockets that rotate in the first place against the action of elastic means, to subsequently cause, with the help of a probe, the opening of the demagnetizing circuit.
- the mentioned means take advantage of the mechanical energy corresponding to the user's action on the button of the network switch when you want to activate the device, which transmits the applied force through a zipper integrated in the button that moves against the elastic means mentioned above open the demagnetizing circuit.
- the improvements proposed with respect to the aforementioned have the main objective of providing a delay mechanism in the operation of the auxiliary switch that has a considerably simple and effective configuration, both from a constructive and functional point of view.
- the network switch object of the present invention is designed to cut or allow the electrical supply of a television or the like to the cathode ray tube and to demagnetizing circuits surrounding said tube. This is done by means of an auxiliary switch module mounted on the same network switch body, which is operated by a probe that is driven by the same button on said network switch.
- the auxiliary switch module incorporates at least one PTC thermistor held between two contact tabs and serves to control the power supply to the demagnetizing circuits of the device.
- the auxiliary switch module incorporates electrical contact delay means that have great mechanical simplicity, as will be detailed hereafter.
- the main feature of the switch of the present invention resides in the fact that said delay means comprise a sliding cylinder that is guided at one end of the push button of the network switch and, therefore, can slide inside of the housing driven by a probe which, in turn, is moved by the push button of the network switch when it is operated by the user.
- a support piston of said housing which is provided with an air outlet groove that allows the movement of the cylinder relative to the piston when pushed by the probe, and an air intake groove of smaller dimensions than the exit groove to cause a backward movement of said cylinder at a lower speed.
- the cylinder of said delay means is guided at one end of the button and slides by the impulse of said probe.
- the guidance is carried out thanks to a longitudinal projection that runs through a groove formed in the auxiliary switch module housing.
- the cylinder travels with respect to the fixed piston, which is provided with a radial recess where an O-ring is arranged to maintain continuous contact between said piston and the cylinder in the relative sliding thereof.
- the O-ring has a small longitudinal play on the plunger, that is, it can move slightly in the direction longitudinal with respect to the piston where it is mounted in order to allow the passage of air through the exit groove during the movement of the cylinder.
- the cylinder is provided with a metal protrusion that, when making contact with metal tabs when approaching them by the probe, allows the passage of current, which previously passes through the contacts of the network switch, towards the PTC and made contact plates that feed the coils of the demagnetizing circuit.
- the piston has an interior space where a compression spring is housed that drives the cylinder in its backward movement.
- the switch button is provided with a vertical projection that is inserted into a groove formed in an extension of the cylinder. Said extension of the cylinder allows the cylinder to be guided, so that when the user presses the button, the probe pushes the cylinder and causes it to move towards the PTC, and when released, the cylinder recoils thanks to the compression spring mentioned above and to the protrusion vertical of the button that stretches the cylinder backwards. In this way, there is a double mechanism of recoil of the cylinder that guarantees the movement of the same towards the initial position.
- the projection acts, then, in the event that the spring does not adequately retract the cylinder, for example if the O-ring deteriorates, although this case is unlikely due to the short stroke of the cylinder and, in general, to the small dimensions of the elements that configure the switch described.
- the button is provided with a probe that is mounted articulated in it on one end and, on the other, it is in contact by sliding in a cavity provided with a plurality of inclined planes.
- the reading made by said end of the probe in the path of said inclined planes determines the connection and disconnection positions of the network switch when the user activates and releases the button, acting on the cylinder and causing the displacement thereof as described. previously.
- the intended objectives are achieved, obtaining a network switch equipped with an auxiliary switch module of noticeably simpler configuration.
- Said auxiliary switch makes it possible to open the demagnetizing circuit in a delay time of not less than 300 ms after the network switch has connected the apparatus, said delay being independent of the speed of the switch actuation performed by the user.
- Figure nS 1 is a perspective view of a network switch with degaussing disconnection, which has been illustrated without the closing cover to appreciate the elements that form them.
- Figure nQ 2 is a plan view of the auxiliary switch module sectioned by the horizontal plane X- X 'of figure nQ 3.
- Figure nQ 3 is a side elevation view of the switch of Figure nQ 1.
- Figure nQ 4 is a bottom plan view of a cavity of the switch housing cover provided with a plurality of inclined planes where the probe end moves to determine the connection and disconnection positions of the network switch when the user presses and releases the button.
- Figures 5 and 6 are enlarged partial views illustrating the movement of the cylinder with respect to the plunger and the respective positions taken by the O-ring with respect to the plunger.
- Figure nQ 7 is a schematic view of the switch of the invention seen from below illustrating the electrical scheme of its operation.
- the network switch (1) object of the improvements of the present invention is intended to regulate the electrical supply of a television or the like to the cathode ray tube thereof and to demagnetizing circuits surrounding said tube.
- the switch (1) is constituted by a base (2) that is covered by a cover in the mounting position, which has not been illustrated in the figures for reasons of clarity.
- the switch (1) is provided with a single button (3) that can slide longitudinally when operated by the user.
- the switch (1) is provided with an auxiliary switch module jointly designated by (4) in the figures, which disconnects the demagnetizing circuit of a television, opening the circuit at least 300 ms after the network switch (1) You have connected the device. This is done, as will be described later, by operating a probe (34) that is driven by the push button (3) of the network switch (1).
- the auxiliary switch module (4) incorporates a PTC type thermistor (5) held between two contact tabs (6, 7) used to control the power supply to the demagnetizing circuits of the device.
- the opening of the demagnetizing circuit by the Auxiliary switch (4) with a minimum delay of 300 ms after the mains switch (1) has connected the device is carried out by means of a delay of the electrical contact comprising a sliding cylinder (8) guided at one end (9) of the button (3) of the network switch (1). More specifically, the cylinder (8) is provided with an extension (10) in which there is a longitudinal groove (11) that slides a shoulder (12) of the button (3).
- the cylinder (8) includes a longitudinal shoulder (13) formed in the lower part thereof, which is arranged inside a guide groove (14) formed in the base (2) of the switch (1).
- a second longitudinal projection (15) serves as a guide and support for the cylinder (8) in its sliding along the base (16) of the auxiliary switch module (4) when it is driven by the said probe (34).
- the guidance of the cylinder (8) in its sliding movement is ensured by a pair of upper longitudinal projections (17, 18) that fit into corresponding grooves of the cover (not illustrated) preventing the cylinder from pitching (8).
- a piston (20) is arranged fixed at the end (21) adjacent to the PTC (5) ) to a vertical wall (22) that emerges from the base (16).
- the piston (20) is provided with a radial air outlet groove (23) that allows the cylinder (8) to slide in relation to the piston (20) when it is pushed by the probe (34) when the button (3) is operated.
- the piston (20) includes an air intake slot (24). These slots (23, 24) can be seen in Figures 5 and 6.
- the intake slot (24) has dimensions smaller than the output slot (23).
- the outlet slot (23) can have a depth of 2 mm, while the intake slot (24) can have a depth of 0.1 mm.
- these values which correspond to a cylinder stroke (8) of approximately 4 mm, are a function of the delay that is intended to be obtained at the opening of the demagnetizing circuit.
- the delay for these values corresponds approximately to a delay greater than 300 ms, sufficient time for the temperature of the PTC to have stabilized and the current flowing through it to present minimum values allowing the demagnetization of the apparatus.
- the plunger (20.) has a radial recess , (25) adapted to accommodate an O-ring (26).
- the O-ring (26) maintains continuous contact between the plunger (20) and the
- the O-ring (26) plays an important role in the passage of air through the grooves (23, 24). In this sense, the O-ring (26) has a small longitudinal play (e) in its seating in the plunger (20). Said set (e) allows a slight longitudinal displacement of the O-ring
- the piston (20) has an interior space (29) where a compression spring (30a) is housed as illustrated in figure nQ 2.
- the spring (30a) allows the cylinder to retract (8) when the operator presses the button (3), although the fact that the cylinder (8) can also retract by the action of the vertical projection (12) of the button (3), which forces the extension (10) of the cylinder ( 8) to back off, moving it in said backward movement.
- the O-ring (26) is arranged as illustrated in Figure 6, in which the longitudinal play (e) is to the left of said figure and the air circulates through the intake slot (24), so that the cylinder (8) goes back at a lower speed than the speed of advance depending on the dimensional relationship between the grooves (23, 24) mentioned above.
- connections between the contacts (44, 45, 46, 47) and the metal tabs (30, 31, 32) can be established on the same base (2, 16) of the switch object of the present invention in order to obtain a set compact.
- connection and disconnection positions adopted by the button (3) of the network switch (1) are determined by the probe (34), which is mounted articulated at one end on the button (3) and, on the other, it remains in contact by sliding in a cavity (35) like the one illustrated in figure nQ 4.
- Said cavity (35) is formed in the inner part of the switch cover (1) and comprises a plurality of inclined planes (36 , 37, 38).
- the probe end (34J is available *? _ In _the_ position (39) when the switch (1) is in the disconnected position to slide along the inclined plane (35) up to the stop (40) that determines the interlocking point of the push button (3) in the connection position, which is established when the probe end (34) is in position (41).
- the probe (34) starts from said position (41) towards position (42) by sliding along the plane (38) to the final disconnection position (43).
- the movements described imply the corresponding sliding of the cylinder (8) with respect to the piston (20) with the consequent delay in the recoil with respect to the advance thereof.
- the piston (20) is driven by the probe (34) by means of the push button (3) taking advantage of the energy provided by the user at the moment in which said push button (3) is operated. mounted on the main switch button (1) of the device in question.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Thermally Actuated Switches (AREA)
- Push-Button Switches (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01903787A EP1197979A1 (en) | 2000-04-19 | 2001-02-06 | Improvements to the subject matter of patent no. 9802346 by on-off mains switch for television set with degaussing disconnection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200001025A ES2161194B1 (es) | 1998-11-11 | 2000-04-19 | Interruptor de red para televisor con desconexion degaussing |
ESP200001025 | 2000-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001080261A1 true WO2001080261A1 (es) | 2001-10-25 |
Family
ID=8493256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2001/000026 WO2001080261A1 (es) | 2000-04-19 | 2001-02-06 | Mejoras introducidas en el objeto de la patente n° 9802346 por interruptor de red para televisor con desconexion degaussing |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1197979A1 (es) |
WO (1) | WO2001080261A1 (es) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4241805B2 (ja) | 2006-11-22 | 2009-03-18 | 船井電機株式会社 | 薄型表示装置の電源スイッチ取付構造 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800538A (en) * | 1954-06-29 | 1957-07-23 | Frank O Kuhn | Electric switch |
US3000034A (en) * | 1958-05-19 | 1961-09-19 | Delman Co | Windshield clearing system |
US3303297A (en) * | 1964-01-23 | 1967-02-07 | Rau Swf Autozubehoer | Time delay switch having pneumatically delayed disconnection means |
DE1540680A1 (de) * | 1962-12-05 | 1969-06-12 | Marquardt J & J | Verzoegerungsglied fuer elektrische Einbauschalter oder entsprechende Schalterkombinationen |
US3721021A (en) * | 1971-05-24 | 1973-03-20 | M Stewart | Reading pacer device |
GB2012488A (en) * | 1977-12-24 | 1979-07-25 | Priesemuth W | Pneumatically operating delay switches |
US4596121A (en) * | 1984-06-12 | 1986-06-24 | Toyota Jidosha Kabushiki Kaisha | Control apparatus for selectively supplying electricity |
-
2001
- 2001-02-06 WO PCT/ES2001/000026 patent/WO2001080261A1/es not_active Application Discontinuation
- 2001-02-06 EP EP01903787A patent/EP1197979A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800538A (en) * | 1954-06-29 | 1957-07-23 | Frank O Kuhn | Electric switch |
US3000034A (en) * | 1958-05-19 | 1961-09-19 | Delman Co | Windshield clearing system |
DE1540680A1 (de) * | 1962-12-05 | 1969-06-12 | Marquardt J & J | Verzoegerungsglied fuer elektrische Einbauschalter oder entsprechende Schalterkombinationen |
US3303297A (en) * | 1964-01-23 | 1967-02-07 | Rau Swf Autozubehoer | Time delay switch having pneumatically delayed disconnection means |
US3721021A (en) * | 1971-05-24 | 1973-03-20 | M Stewart | Reading pacer device |
GB2012488A (en) * | 1977-12-24 | 1979-07-25 | Priesemuth W | Pneumatically operating delay switches |
US4596121A (en) * | 1984-06-12 | 1986-06-24 | Toyota Jidosha Kabushiki Kaisha | Control apparatus for selectively supplying electricity |
Also Published As
Publication number | Publication date |
---|---|
EP1197979A1 (en) | 2002-04-17 |
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