EP0572192B1 - Saddle type bobbin for deflection coil - Google Patents
Saddle type bobbin for deflection coil Download PDFInfo
- Publication number
- EP0572192B1 EP0572192B1 EP93303990A EP93303990A EP0572192B1 EP 0572192 B1 EP0572192 B1 EP 0572192B1 EP 93303990 A EP93303990 A EP 93303990A EP 93303990 A EP93303990 A EP 93303990A EP 0572192 B1 EP0572192 B1 EP 0572192B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bobbin
- coil
- ribbon cable
- nozzle
- winding
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
- H01J29/76—Deflecting by magnetic fields only
- H01J29/762—Deflecting by magnetic fields only using saddle coils or printed windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/236—Manufacture of magnetic deflecting devices for cathode-ray tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/071—Winding coils of special form
- H01F2041/0711—Winding saddle or deflection coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2209/00—Apparatus and processes for manufacture of discharge tubes
- H01J2209/236—Manufacture of magnetic deflecting devices
- H01J2209/2363—Coils
- H01J2209/2366—Machines therefor, e.g. winding, forming, welding, or the like
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/70—Electron beam control outside the vessel
- H01J2229/703—Electron beam control outside the vessel by magnetic fields
- H01J2229/7032—Conductor design and distribution
- H01J2229/7035—Wires and conductors
- H01J2229/7036—Form of conductor
- H01J2229/7037—Form of conductor flat, e.g. foil, or ribbon type
Definitions
- the present invention relates to a saddle type bobbin for a deflection coil of a deflection yoke mounted on television receivers or display units.
- Fig. 1 shows an example of a bobbin for a saddle type deflection coil for use in a typical deflection yoke.
- the bobbin 2 is provided with a plurality of coil-winding grooves 5, on which, for example, a coiling wire 11 is wound in layers as shown in Fig. 2, to thereby form a deflection coil.
- the coiling wire 11 comprises single conductive wires (including litz wires) with an insulating layer 4 provided thereon which is coated with an adhesive on its periphery.
- the coiling wire 11 In winding the coiling wire 11 on the aforementioned coil-winding grooves 5, the coiling wire 11 is wound in layers by a flyer type automatic winding machine, in single or multiple strands, unbounded or separated in the form of single wires, whereby a deflection coil will be produced. Subsequently, the thus layer-wound coil is supplied with electric power, to heat and melt the adhesive applied outside the insulating layer 4, so that the coil wires adhere to each other to complete a deflection coil.
- Such prior art deflection coil in accordance with the prior art portion of claim 1 as described in DE-A-2744048 suffers from difficulties: owing to variation of the stretching force acting on coiling wire 11 as it is wound and other reasons, the coiling wire 11 is displaced and biassed as shown in Fig. 2, and in other cases, the order of winding of coiling wire 11 is altered and hence such winding as previously designated by a design instruction cannot be reproduced. Further, the biassed states of coiling wire 11 of deflection coil that is mass-produced differ from one another for each article, therefore, it would be impossible to regulate a deflection field with high precision.
- the coiling wire 11 is reduced in its displacement and biassed winding as the width of the coil-winding groove is narrowed to satisfy an original design, but followed by another problem of coil performance being deteriorated because of a ratio L/R between inductance L and resistance R being reduced.
- a deflection coil which is composed by forming a conductive ribbon cable in which a plurality of adjoining conductive wires are arranged parallel in a row as shown in Figs. 3A and 3D, and winding this member in place of winding single wire strands as used to be practiced.
- a similar conductive ribbon cable is disclosed in DE-A-2744048.
- Examples of conductive ribbon cable 15 include one that is composed as shown in Fig. 3A by arranging in parallel a plurality of conductive wires 8 of copper, aluminum or the like with an insulating layer 4 coated thereon, and adhering them using an adhesive 6; one that is composed as shown in Fig. 3B by arranging in parallel a plurality of conductive wires 8 with an insulating layer 4 coated thereon, and adhering together the wires on one side of an insulator sheet 7 of resin, etc., with an adhesive 6; one that is composed as shown in Fig. 3C by arranging and adhering together in parallel a plurality of conductive wires 8 formed with an insulating layer 4 and an adhesive layer 9; and one that is composed as shown in Fig. 3D by arranging a plurality of conductive wires in a contacting manner in a row, each wire being with an insulating layer 4 covered by a thermoplastic adhesive layer 20.
- the conductive wires 8 forming the aforementioned conductive ribbon cable 15 are arranged in parallel with one another in an orderly manner in a row, and therefore, neither will each conductive wire 8 be displaced in ribbon cable 15, nor will the order of the wires be altered. Therefore, when this conductive ribbon cable 15 is used, namely, the ribbon cable 15 is wound in layers, it is possible to produce a deflection coil free from the problems such as significant displacement of the conductive wires 8, and the like.
- a saddle type bobbin for the deflection coil typically has coil-winding grooves 5 in its crossover portions 18, 19 disposed respectively on head and tail end sides thereof, as is exemplarily shown in Fig. 5.
- the height of an inner side flange 3B of the coil-winding groove 5 is formed higher than that of a corresponding outer side flange 3A thereof.
- the winding machine of this previously proposed example is configured as shown in Figs. 6A and 6B. Specifically, there are provided a base 1, a supporting column 17, a bobbin attachment table 33, a bobbin holding member 31, a bobbin 25 for conductive ribbon cable 15, a bobbin rotating mechanism 12, a back-tension adding means 16, a conductive ribbon cable 15, a nozzle supporting table 26, a nozzle rotating mechanism 28, a nozzle shaft 27, a nozzle 30 disposed in a front end of the nozzle shaft, a nozzle head 23, a nozzle supporting column 35, a bobbin 2, a supporting table 41 for bobbin 2, a bobbin holding portion 42, an arm 40, a first bobbin rotating mechanism 38, a bobbin-side supporting column 37, and a second bobbin rotating mechanism 44.
- Nozzle shaft 27 is rotatable in both clockwise and anti-clockwise directions as desired by means of nozzle rotating mechanism 28.
- Nozzle supporting table 26 is attached movable in a vertical direction shown by Y to nozzle supporting column 35.
- Nozzle supporting 35 is placed upright movable in a horizontal direction shown by X. Attached to the lower end of nozzle shaft 27 is nozzle 30, which is rotatable to a desired direction.
- Bobbin holding portion 42 of bobbin 2 is shiftable in Z-direction (a direction normal to the document surface in Fig. 6B).
- the bobbin 2 is rotatable about X-axis in link with the rotation of first bobbin rotating mechanism 38 and is driven rotatably about Z-axis in link with second bobbin rotating mechanism 44.
- conductive ribbon cable 15 is fitted into a groove disposed in the right side inner circumferential wall 45 of bobbin 2 while bobbin 2 is moved in the direction of the arrow and nozzle 30 is moved in X-axis direction facing the inner side of the bobbin, keeping a predetermined distance therebetween.
- nozzle 30 reaches the upper side or head side of bobbin 2, nozzle 30 will be rotated from a position 'a' through a position 'b' to a position 'c' in a course shown by arrows as shown in Fig. 7B.
- conductive ribbon cable 15 may be wound smoothly if nozzle 30 is once rotated up to a position beyond flange 3B so as to round out the ribbon cable, and then returned to the position 'c'.
- bobbin 2 is rotated about X-axis by 90 degrees in the clockwise direction to the state shown in Fig. 7C. From this state, bobbin 2 is rotated by 180 degrees in the anti-clockwise direction about an X-axis passing through a point Z1, to thereby make a state shown in Fig. 7D.
- conductive ribbon cable 15 is fitted to the crossover portion on the head side of bobbin 2.
- bobbin 2 is rotated 90 degrees in the clockwise direction about the X-axis to reach a state shown in Fig. 7E.
- nozzle 30 is rotated from the position 'c' through a position 'd' to the position 'a' in a course shown by arrows in Fig. 7E.
- conductive ribbon cable 15 may be wound smoothly if nozzle 30 is once rotated beyond flange 3B so as to round out the ribbon cable, and then returned to the position 'a'.
- bobbin 2 is shifted downward along Z-axis, and nozzle 30 being moved left in X-axis direction while facing the inner side of the bobbin keeping a predetermined distance therebetween, whereby conductive ribbon cable 15 is fitted into a groove disposed on the opposite side.
- nozzle 30 is moved from the position 'a' through the position 'b' to the position 'c' in a course shown by arrows in Fig. 7F.
- nozzle 30 is once rotated up to a position beyond flange 3B so as to round out the ribbon cable 15, and then returned to the position 'c'. Then, bobbin 2 is rotated 90 degrees in the clockwise direction about the X-axis to reach a state shown in Fig. 7G. From this state, bobbin 2 is rotated 180 degrees in the anti-clockwise direction about Z-axis to thereby make a state shown in Fig. 7H. As a result, conductive ribbon cable 15 is fitted to the crossover portion on the tail end side of bobbin 2.
- bobbin 2 is rotated 90 degrees in the clockwise direction about X-axis to make a state shown in Fig. 7I.
- nozzle 30 is once rotated opposite to a position beyond flange 3B so as to round out the conductive ribbon cable 15, and then, nozzle 30 is rotated from the position 'c' through the position 'd' to the position 'a' in a course shown by the arrow.
- the operation returns to the initial state shown in Fig. 7A, and the cycle described heretofore will be repeated to wind conductive ribbon cable 15 successively into each groove of bobbin 2, whereby a saddle type deflection coil may be completed.
- the present invention has been achieved to eliminate the above problems, and it is an object of the present invention to provide a saddle type bobbin for deflection coil wherein a conductive ribbon cable (wire row member) can be wound with precision by a simple winding operation that may prevent a nozzle from colliding against crossover portion while the conductive ribbon cable is wound on the saddle-shaped bobbin.
- a saddle type bobbin for a deflection coil comprising a head side and a tail end side, a plurality of rows of coil winding grooves extending generally between the head side and the tail end side for receiving a conductive wire ribbon cable to form the deflection coil, and crossover grooves at the head side and the tail end side of the bobbin, linking the coil winding grooves so that the conductive wire ribbon cable can be fitted in a continuous manner to the coil winding grooves and crossover grooves to form a saddle-type deflection coil, each of said crossover grooves being defined between an outer flange and an inner flange of the bobbin, characterised in that the height of said inner flange is equal to, or smaller than that of said corresponding outer flange.
- a conductive ribbon cable is fitted into a coil-winding groove by once rotating a nozzle for delivering the conductive ribbon cable up to a position beyond the inner flange so as to round out the conductive ribbon cable when the nozzle travels from the inner side with respect to the longitudinal direction of the bobbin to the crossover portion, and returning the nozzle to the center of the coil-winding groove.
- conductive ribbon cable can be wound into the coil-winding grooves by positioning the front end of the nozzle for delivering conductive ribbon cable closer to the height of the outer flange of the coil-winding groove. As a result, the conductive ribbon cable can be wound up stably and exactly without failure.
- the height of the inner flange is set equal to or smaller than that of the corresponding outer flange in both the crossover portions, when the nozzle rotates, or travels from the inner side of the bobbin with respect to longitudinal direction thereof to the crossover portion, or vice versa, it is possible to prevent collision of the nozzle with the inner flange, facilitating the winding operation.
- Fig. 9 shows main configurations of a saddle type bobbin for deflection coil in accordance with the embodiment of the present invention.
- Fig. 10 shows a schematic perspective view of a saddle type bobbin for deflection coil shown cut in half in accordance with the embodiment of the present invention.
- the characteristic feature of the embodiment of the invention lies in that the height of an inner flange of a coil-winding groove disposed for each of crossover portions on the head side and tail end (neck) side of a bobbin is equal to, or less than that of a corresponding outer flange, and the other configurations are the same as those of the prior art example.
- bobbin 2 has coil-winding grooves 5 defined between outer and inner flanges 3A and 3B in its crossover portions 18, 19 disposed respectively on head and tail end sides thereof.
- the height of inner flange 3B of the coil-winding groove 5 is formed smaller than that of outer flange 3A thereof.
- Nozzle 30 for delivering conductive ribbon cable 15 is disposed close to flange 3A of coil-winding groove 5.
- conductive ribbon cable 15 can be wound into the coil-winding groove 5 formed in the crossover portion by keeping nozzle 30 for delivering ribbon cable 15 closer to the groove. As a result, conductive ribbon cable 15 can be wound up stably and exactly without displacing or deviating from the groove of the crossover portion.
- the present invention is not limited to the above embodiment, but various other configurations can be adopted.
- inner flange 3B of the crossover portion is smaller than that of outer flange 3A
- inner flange 3B may be as high as corresponding outer flange 3A.
- the present invention will work well if a relation h W ⁇ h B ⁇ h A holds, where h W denotes a height of a layered coil 13 of the conductive ribbon cable in coil-winding groove 5 of the crossover portion, h B and h A represent heights of outer flange 3A and inner flange 3B, respectively.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Description
- The present invention relates to a saddle type bobbin for a deflection coil of a deflection yoke mounted on television receivers or display units.
- In recent years, development of high definition television receivers increasingly requires strict specifications relating to color mismatching, i.e., convergence of the cathode-ray tube screen of these apparatus. It is therefore earnestly desired that the deflection magnetic fields be controlled more precisely.
- Fig. 1 shows an example of a bobbin for a saddle type deflection coil for use in a typical deflection yoke. The
bobbin 2 is provided with a plurality of coil-windinggrooves 5, on which, for example, a coiling wire 11 is wound in layers as shown in Fig. 2, to thereby form a deflection coil. The coiling wire 11 comprises single conductive wires (including litz wires) with aninsulating layer 4 provided thereon which is coated with an adhesive on its periphery. - In winding the coiling wire 11 on the aforementioned coil-winding
grooves 5, the coiling wire 11 is wound in layers by a flyer type automatic winding machine, in single or multiple strands, unbounded or separated in the form of single wires, whereby a deflection coil will be produced. Subsequently, the thus layer-wound coil is supplied with electric power, to heat and melt the adhesive applied outside theinsulating layer 4, so that the coil wires adhere to each other to complete a deflection coil. - Such prior art deflection coil in accordance with the prior art portion of claim 1 as described in DE-A-2744048, however, suffers from difficulties: owing to variation of the stretching force acting on coiling wire 11 as it is wound and other reasons, the coiling wire 11 is displaced and biassed as shown in Fig. 2, and in other cases, the order of winding of coiling wire 11 is altered and hence such winding as previously designated by a design instruction cannot be reproduced. Further, the biassed states of coiling wire 11 of deflection coil that is mass-produced differ from one another for each article, therefore, it would be impossible to regulate a deflection field with high precision. Additionally, mass-production makes dispersion variations between products larger, resulting in lowering of the yield, and hence the prior art winding method is disadvantageous in view of the cost. Even in the just-mentioned prior art method, the coiling wire 11 is reduced in its displacement and biassed winding as the width of the coil-winding groove is narrowed to satisfy an original design, but followed by another problem of coil performance being deteriorated because of a ratio L/R between inductance L and resistance R being reduced.
- In order to eliminate such problems, the present applicant has previously proposed a deflection coil which is composed by forming a conductive ribbon cable in which a plurality of adjoining conductive wires are arranged parallel in a row as shown in Figs. 3A and 3D, and winding this member in place of winding single wire strands as used to be practiced. A similar conductive ribbon cable is disclosed in DE-A-2744048.
- Examples of
conductive ribbon cable 15 include one that is composed as shown in Fig. 3A by arranging in parallel a plurality ofconductive wires 8 of copper, aluminum or the like with aninsulating layer 4 coated thereon, and adhering them using an adhesive 6; one that is composed as shown in Fig. 3B by arranging in parallel a plurality ofconductive wires 8 with aninsulating layer 4 coated thereon, and adhering together the wires on one side of aninsulator sheet 7 of resin, etc., with an adhesive 6; one that is composed as shown in Fig. 3C by arranging and adhering together in parallel a plurality ofconductive wires 8 formed with aninsulating layer 4 and an adhesive layer 9; and one that is composed as shown in Fig. 3D by arranging a plurality of conductive wires in a contacting manner in a row, each wire being with aninsulating layer 4 covered by a thermoplasticadhesive layer 20. - The
conductive wires 8 forming the aforementionedconductive ribbon cable 15 are arranged in parallel with one another in an orderly manner in a row, and therefore, neither will eachconductive wire 8 be displaced inribbon cable 15, nor will the order of the wires be altered. Therefore, when thisconductive ribbon cable 15 is used, namely, theribbon cable 15 is wound in layers, it is possible to produce a deflection coil free from the problems such as significant displacement of theconductive wires 8, and the like. - The production of such a deflection coil as described above is achieved by inserting the conductive ribbon cable into a coil-winding
groove 5 having a flange 3 so as to wind it in layers in parallel to thebottom face 10 of thegroove 5. The deflection coil formed with theconductive ribbon cable 15 can be remarkably improved in its characteristics as compared with those in the prior art. - Meanwhile, a saddle type bobbin for the deflection coil typically has coil-winding
grooves 5 in itscrossover portions 18, 19 disposed respectively on head and tail end sides thereof, as is exemplarily shown in Fig. 5. The height of aninner side flange 3B of the coil-windinggroove 5 is formed higher than that of a correspondingouter side flange 3A thereof. Ifconductive ribbon cable 15 is tried to be wound in coil-windinggroove 5 of thebobbin 2 using a flyer type winding machine (not shown) for winding conventional single wires, theconductive ribbon cable 15 would be wound twisted incrossover portions 18, 19, or displaced from coil-windinggroove 5, since the front end of the nozzle of the winding machine is arranged apart away from coil-windinggroove 5. To deal with this, the applicants hereof have already proposed a method of windingconductive ribbon cable 15 by supplying and inserting it stably into coil-windinggroove 5 using a wire winding machine having a structure as shown in Figs. 6A and 6B in which a distance between the front end of the nozzle for deliveringconductive ribbon cable 15 and coil-windinggroove 5 can be shortened. - The winding machine of this previously proposed example is configured as shown in Figs. 6A and 6B. Specifically, there are provided a base 1, a supporting
column 17, a bobbin attachment table 33, abobbin holding member 31, abobbin 25 forconductive ribbon cable 15, abobbin rotating mechanism 12, a back-tension adding means 16, aconductive ribbon cable 15, a nozzle supporting table 26, anozzle rotating mechanism 28, anozzle shaft 27, anozzle 30 disposed in a front end of the nozzle shaft, anozzle head 23, anozzle supporting column 35, abobbin 2, a supporting table 41 forbobbin 2, abobbin holding portion 42, anarm 40, a firstbobbin rotating mechanism 38, a bobbin-side supporting column 37, and a secondbobbin rotating mechanism 44. - The aforementioned
conductive ribbon cable 15 coiled onbobbin 25 is inserted throughnozzle shaft 27 while being tension-adjusted bytension adding means 16. The front end ofnozzle 30 for deliveringconductive ribbon cable 15 is disposed close to coil-windinggroove 5 ofbobbin 2.Nozzle shaft 27 is rotatable in both clockwise and anti-clockwise directions as desired by means ofnozzle rotating mechanism 28. Nozzle supporting table 26 is attached movable in a vertical direction shown by Y to nozzle supportingcolumn 35. Nozzle supporting 35 is placed upright movable in a horizontal direction shown by X. Attached to the lower end ofnozzle shaft 27 isnozzle 30, which is rotatable to a desired direction. - Bobbin holding
portion 42 ofbobbin 2 is shiftable in Z-direction (a direction normal to the document surface in Fig. 6B). Thebobbin 2 is rotatable about X-axis in link with the rotation of firstbobbin rotating mechanism 38 and is driven rotatably about Z-axis in link with secondbobbin rotating mechanism 44. - The above, respective rotating and shifting mechanisms are controlled by means of an illustrated control device, so that
conductive ribbon cable 15 can be wound smoothly in layers into coil-windinggroove 5 ofbobbin 2 to thereby form a deflection coil. - Now, fabrication procedures of a saddle type deflection coil using this wire winding machine will be explained with reference to Fig. 7A to 7I. Similar procedures are known from, for example, EP-A-0264807.
- In the beginning, as shown in Fig. 7A,
conductive ribbon cable 15 is fitted into a groove disposed in the right side innercircumferential wall 45 ofbobbin 2 whilebobbin 2 is moved in the direction of the arrow andnozzle 30 is moved in X-axis direction facing the inner side of the bobbin, keeping a predetermined distance therebetween. Whennozzle 30 reaches the upper side or head side ofbobbin 2,nozzle 30 will be rotated from a position 'a' through a position 'b' to a position 'c' in a course shown by arrows as shown in Fig. 7B. During this,conductive ribbon cable 15 may be wound smoothly ifnozzle 30 is once rotated up to a position beyondflange 3B so as to round out the ribbon cable, and then returned to the position 'c'. Next,bobbin 2 is rotated about X-axis by 90 degrees in the clockwise direction to the state shown in Fig. 7C. From this state,bobbin 2 is rotated by 180 degrees in the anti-clockwise direction about an X-axis passing through a point Z₁, to thereby make a state shown in Fig. 7D. As a result,conductive ribbon cable 15 is fitted to the crossover portion on the head side ofbobbin 2. Then,bobbin 2 is rotated 90 degrees in the clockwise direction about the X-axis to reach a state shown in Fig. 7E. After the rotation,nozzle 30 is rotated from the position 'c' through a position 'd' to the position 'a' in a course shown by arrows in Fig. 7E. In this case,conductive ribbon cable 15 may be wound smoothly ifnozzle 30 is once rotated beyondflange 3B so as to round out the ribbon cable, and then returned to the position 'a'. - Next, in this state,
bobbin 2 is shifted downward along Z-axis, andnozzle 30 being moved left in X-axis direction while facing the inner side of the bobbin keeping a predetermined distance therebetween, wherebyconductive ribbon cable 15 is fitted into a groove disposed on the opposite side. Whenbobbin 2 goes down to reach a position where the center of the groove of the crossover portion on the tail end side ofbobbin 2faces nozzle 30, thenozzle 30 is moved from the position 'a' through the position 'b' to the position 'c' in a course shown by arrows in Fig. 7F. Also in this case,nozzle 30 is once rotated up to a position beyondflange 3B so as to round out theribbon cable 15, and then returned to the position 'c'. Then,bobbin 2 is rotated 90 degrees in the clockwise direction about the X-axis to reach a state shown in Fig. 7G. From this state,bobbin 2 is rotated 180 degrees in the anti-clockwise direction about Z-axis to thereby make a state shown in Fig. 7H. As a result,conductive ribbon cable 15 is fitted to the crossover portion on the tail end side ofbobbin 2. - Next,
bobbin 2 is rotated 90 degrees in the clockwise direction about X-axis to make a state shown in Fig. 7I. In this state,nozzle 30 is once rotated opposite to a position beyondflange 3B so as to round out theconductive ribbon cable 15, and then,nozzle 30 is rotated from the position 'c' through the position 'd' to the position 'a' in a course shown by the arrow. As a result, the operation returns to the initial state shown in Fig. 7A, and the cycle described heretofore will be repeated to windconductive ribbon cable 15 successively into each groove ofbobbin 2, whereby a saddle type deflection coil may be completed. - In the above structure where
inner flange 3B of the crossover portion is formed higher than a correspondingouter flange 3A for either the head side or tail end side ofbobbin 2, it has become known that whennozzle 30 travels from the inner side with respect to the longitudinal direction of the bobbin to the crossover portion, for example, whennozzle 30 is rotated from the position 'a' through the position 'b' to the position 'c' in the course shown by the arrow, conductive ribbon cable could be smoothly wound ifnozzle 30 is once rotated up to a position beyondinner flange 3B so as to round out theribbon cable 15, and then is returned to the position 'c'. However, winding in this manner tends to causenozzle 30 to strike againstinner flange 3B, and thus the operation becomes difficult. This difficulty can occur in all the steps shown in Figs. 7B, 7E, 7F and 7I. - Further, when a complete deflection coil with a
cover 22 fitted over theflanges band 24, the greater height ofinner flange 3B of coil-windinggroove 5 makescover 22 bulky, requiring a large space, as shown in Fig. 8. - The present invention has been achieved to eliminate the above problems, and it is an object of the present invention to provide a saddle type bobbin for deflection coil wherein a conductive ribbon cable (wire row member) can be wound with precision by a simple winding operation that may prevent a nozzle from colliding against crossover portion while the conductive ribbon cable is wound on the saddle-shaped bobbin.
- The above object of the present invention can be achieved according to claim 1 by providing a
saddle type bobbin for a deflection coil comprising a head side and a tail end side, a plurality of rows of coil winding grooves extending generally between the head side and the tail end side for receiving a conductive wire ribbon cable to form the deflection coil, and crossover grooves
at the head side and the tail end side of the bobbin, linking the coil winding grooves so that the conductive wire ribbon cable can be fitted in a continuous manner to the coil winding grooves and crossover grooves to form a saddle-type deflection coil, each of said crossover grooves
being defined between an outer flange and an inner flange of the bobbin, characterised in that the height of said inner flange is equal to, or smaller than that of said corresponding outer flange. - In accordance with the aspect and feature of the bobbin stated above, a conductive ribbon cable is fitted into a coil-winding groove by once rotating a nozzle for delivering the conductive ribbon cable up to a position beyond the inner flange so as to round out the conductive ribbon cable when the nozzle travels from the inner side with respect to the longitudinal direction of the bobbin to the crossover portion, and returning the nozzle to the center of the coil-winding groove. Upon this process, it is possible to carry out coil-winding without causing collision of the nozzle with the inner flange, which would occur otherwise unless the height of the inner flange is equal to, or smaller than that of the corresponding outer flange.
- As described above, since the height of the inner flange is set equal to, or smaller than that of the corresponding outer flange in both the crossover portions on the head side and tail end side, conductive ribbon cable can be wound into the coil-winding grooves by positioning the front end of the nozzle for delivering conductive ribbon cable closer to the height of the outer flange of the coil-winding groove. As a result, the conductive ribbon cable can be wound up stably and exactly without failure.
- Moreover, since the height of the inner flange is set equal to or smaller than that of the corresponding outer flange in both the crossover portions, when the nozzle rotates, or travels from the inner side of the bobbin with respect to longitudinal direction thereof to the crossover portion, or vice versa, it is possible to prevent collision of the nozzle with the inner flange, facilitating the winding operation.
- The above and many other advantages, features and additional objects of the present invention will become manifest to those versed in the art upon making reference to the following detailed description and accompanying drawings in which preferred structural embodiments incorporating the principles of the present invention are shown by way of illustrative example.
- Fig. 1 is a schematic perspective view showing an example of a prior art saddle type bobbin for deflection coil;
- Fig. 2 is a sectional view partially showing a state of coil-windings in a prior art deflection coil;
- Figs. 3A to 3D are schematic perspective and sectional views showing different types of prior art conductive wire row members (conductive ribbon cables);
- Fig. 4 is an illustration showing a fabrication example of a prior art deflection coil by winding conductive ribbon cable in layers;
- Fig. 5 is an illustrative diagram showing a coil-winding state of a conductive ribbon cable on a prior art saddle type bobbin for deflection coil;
- Figs. 6A and 6B are, respectively, top and side views schematically showing a prior art wire winding machine;
- Figs. 7A to 7I are illustrations showing conventional operation steps of winding a conductive ribbon cable;
- Fig. 8 is a sectional view partially showing a prior art bobbin with a cover being fitted over flanges on its tail end (neck) side;
- Fig. 9 is a constructional illustration showing elemental portions of a saddle type bobbin for deflection coil in accordance with one embodiment of the present invention; and
- Fig. 10 is a schematic perspective view showing a bobbin cut in half of a saddle type bobbin for deflection coil of the embodiment of the invention shown in Fig. 9.
- An embodiment of the invention will hereinafter be described with reference to the accompanying drawings. In the description of the embodiment of the invention, like reference numerals will be allotted for the same parts with those in the previously described prior art example, and the detailed description for those parts will be omitted to avoid the repetition. Fig. 9 shows main configurations of a saddle type bobbin for deflection coil in accordance with the embodiment of the present invention. Fig. 10 shows a schematic perspective view of a saddle type bobbin for deflection coil shown cut in half in accordance with the embodiment of the present invention.
- The characteristic feature of the embodiment of the invention lies in that the height of an inner flange of a coil-winding groove disposed for each of crossover portions on the head side and tail end (neck) side of a bobbin is equal to, or less than that of a corresponding outer flange, and the other configurations are the same as those of the prior art example.
- As shown in these figures,
bobbin 2 has coil-windinggrooves 5 defined between outer andinner flanges crossover portions 18, 19 disposed respectively on head and tail end sides thereof. The height ofinner flange 3B of the coil-windinggroove 5 is formed smaller than that ofouter flange 3A thereof.Nozzle 30 for deliveringconductive ribbon cable 15 is disposed close toflange 3A of coil-windinggroove 5. - Next, when a deflection coil is fabricated by winding
conductive ribbon cable 15 onsaddle type bobbin 2 for deflection coil having the above structure using a wire-winding machine described in the prior art, the same winding procedures or steps as those illustrated in Figs. 7A to 7B are conducted. - According to this embodiment, since the height of
inner flange 3B of a coil-winding groove disposed for each of the crossover portions on head side and neck side of the bobbin is less than that of the correspondingouter flange 3A,conductive ribbon cable 15 can be wound into the coil-windinggroove 5 formed in the crossover portion by keepingnozzle 30 for deliveringribbon cable 15 closer to the groove. As a result,conductive ribbon cable 15 can be wound up stably and exactly without displacing or deviating from the groove of the crossover portion. In addition, since the height ofinner flange 3B is smaller than that ofouter flange 3A, collision betweennozzle 30 andflange 3B does not occur whennozzle 30 is rotated beyondflange 3B so as to round out the ribbon cable in each step of Figs. 7B, 7E, 7F and 7I. Consequently, the operation becomes simplified. - Further, since the height of
inner flange 3B is smaller than that ofouter flange 3A, cover 22 of tail end side can be made smaller, thus making it possible to reduce the space required on the tail end side. - It should be noted that the present invention is not limited to the above embodiment, but various other configurations can be adopted. For example, although in the above embodiment the height of
inner flange 3B of the crossover portion is smaller than that ofouter flange 3A,inner flange 3B may be as high as correspondingouter flange 3A. More specifically, the present invention will work well if a relation hW ≦ hB ≦ hA holds, where hW denotes a height of alayered coil 13 of the conductive ribbon cable in coil-windinggroove 5 of the crossover portion, hB and hA represent heights ofouter flange 3A andinner flange 3B, respectively.
Claims (1)
- A saddle type bobbin (2) for a deflection coil comprising a head side and a tail end side, a plurality of rows of coil winding grooves (5) extending generally between the head side and the tail end side for receiving a conductive wire ribbon cable (15) to form the deflection coil, and crossover grooves (18,19) at the head side and the tail end side of the bobbin, linking the coil winding grooves (5) so that the conductive wire ribbon cable (15) can be fitted in a continuous manner to the coil winding grooves and crossover grooves to form a saddle-type deflection coil, each of said crossover grooves (18,19) being defined between an outer flange (3A) and an inner flange (3B) of the bobbin, characterised in that the height of said inner flange (3B) is equal to, or smaller than that of said corresponding outer flange (3A).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4158622A JPH05325832A (en) | 1992-05-26 | 1992-05-26 | Saddle type bobbin for deflection coil |
JP158622/92 | 1992-05-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0572192A1 EP0572192A1 (en) | 1993-12-01 |
EP0572192B1 true EP0572192B1 (en) | 1995-06-28 |
Family
ID=15675737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93303990A Expired - Lifetime EP0572192B1 (en) | 1992-05-26 | 1993-05-21 | Saddle type bobbin for deflection coil |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0572192B1 (en) |
JP (1) | JPH05325832A (en) |
DE (1) | DE69300218T2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1007859A3 (en) * | 1993-12-07 | 1995-11-07 | Philips Electronics Nv | Saddle-shaped deflection coil, stranded WRAPPED AND WINDING METHOD. |
JP3737191B2 (en) * | 1996-04-26 | 2006-01-18 | 株式会社東芝 | Cathode ray tube deflection yoke and cathode ray tube apparatus |
TW466531B (en) * | 1998-12-07 | 2001-12-01 | Koninkl Philips Electronics Nv | Saddle-shaped deflection coil and winding method |
JP2002367535A (en) * | 2001-06-07 | 2002-12-20 | Mitsubishi Electric Corp | Deflection yoke device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2744048C2 (en) * | 1977-09-30 | 1979-08-23 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Deflection unit for a television receiver |
DE3635220A1 (en) * | 1986-10-16 | 1988-04-21 | Standard Elektrik Lorenz Ag | WRAPPING DEVICE |
DE3920699A1 (en) * | 1989-06-24 | 1991-01-10 | Nokia Unterhaltungselektronik | SADDLE COIL ARRANGEMENT FOR A CATHODE RAY TUBE AND COIL CARRIER FOR SUCH AN ARRANGEMENT |
-
1992
- 1992-05-26 JP JP4158622A patent/JPH05325832A/en active Pending
-
1993
- 1993-05-21 EP EP93303990A patent/EP0572192B1/en not_active Expired - Lifetime
- 1993-05-21 DE DE69300218T patent/DE69300218T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH05325832A (en) | 1993-12-10 |
DE69300218T2 (en) | 1996-03-14 |
EP0572192A1 (en) | 1993-12-01 |
DE69300218D1 (en) | 1995-08-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6782600B2 (en) | Method for winding an armature coil | |
EP0572192B1 (en) | Saddle type bobbin for deflection coil | |
EP0567345B1 (en) | Deflection coil and fabrication method thereof | |
EP0590548B1 (en) | Wire ribbon | |
JP2816458B2 (en) | Saddle deflection coil | |
EP0566303B1 (en) | Fabrication method of a deflection coil | |
EP0590547B1 (en) | A frame body for use in winding a coil for deflection yoke | |
JP3109241B2 (en) | Deflection coil and method of manufacturing the same | |
JP2897544B2 (en) | Deflection yoke | |
JP3023940B2 (en) | Method of manufacturing deflection coil | |
EP0569231B1 (en) | Deflection coil and fabrication method thereof | |
EP0581586A1 (en) | Deflection yoke | |
JP2897545B2 (en) | Deflection yoke coil winding machine | |
JP3355670B2 (en) | Deflection yoke and method of adjusting distribution of deflection magnetic field | |
KR100227703B1 (en) | Detached wire-wound deflection coil, winding method and device thereof | |
US6882097B2 (en) | Deflection yoke | |
JPH01107436A (en) | Deflection yoke | |
MXPA00010184A (en) | Coil winding apparatus and method for manufacturing deflection coil. | |
JPH0631057U (en) | Deflection yoke coil | |
JPH0636194U (en) | Deflection yoke device | |
JP2003142014A (en) | Deflection yoke and cathode-ray tube image receiving device having the deflection yoke | |
JP2001229849A (en) | Deflection yoke apparatus | |
KR19980023410A (en) | Multi-layer Winding Deflection Coil of Cathode Ray Tube and Its Winding Method | |
JPH07220654A (en) | Deflection yoke | |
JPH0648154U (en) | Deflection yoke |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE GB IT |
|
17P | Request for examination filed |
Effective date: 19931214 |
|
17Q | First examination report despatched |
Effective date: 19940128 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
ITF | It: translation for a ep patent filed |
Owner name: DOTT. FRANCO CICOGNA |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE GB IT |
|
REF | Corresponds to: |
Ref document number: 69300218 Country of ref document: DE Date of ref document: 19950803 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20120516 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20120516 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20120519 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69300218 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69300218 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20130520 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20130520 Ref country code: DE Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20130522 |