EP0666579A1 - High-tension transformer - Google Patents
High-tension transformer Download PDFInfo
- Publication number
- EP0666579A1 EP0666579A1 EP95101308A EP95101308A EP0666579A1 EP 0666579 A1 EP0666579 A1 EP 0666579A1 EP 95101308 A EP95101308 A EP 95101308A EP 95101308 A EP95101308 A EP 95101308A EP 0666579 A1 EP0666579 A1 EP 0666579A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylindrical bobbin
- coil part
- tension coil
- forward end
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/42—Flyback transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/02—Coils wound on non-magnetic supports, e.g. formers
- H01F2005/022—Coils wound on non-magnetic supports, e.g. formers wound on formers with several winding chambers separated by flanges, e.g. for high voltage applications
Definitions
- the present invention relates to a high-tension transformer having a low-tension coil part which is inserted in a through hole of a high-tension coil part, and more specifically, it relates to a high-tension transformer improved in a structure which is formed on an outer peripheral surface of a cylindrical bobbin forming a low-tension coil part.
- a flyback transformer (hereinafter referred to as an FBT) is known as a high-tension transformer having a low-tension coil part which is inserted in a through hole of a high-tension coil part.
- Such an FBT is employed for supplying a high dc voltage to an anode of a cathode ray tube of a television receiver or the like.
- Fig. 1 is a sectional view schematically illustrating the structure of the aforementioned FBT.
- This FBT 1 has a pair of core members 2 and 3 which are coupled with each other to form an angular-annular core.
- the core members 2 and 3 have leg portions 2a, 2b, 3a and 3b respectively. Forward ends of the leg portions 2a and 3a as well as those of the leg portions 2b and 3b are bonded with each other respectively through adhesives (not shown) or the like.
- the leg portions 2a and 3a are inserted in a low-tension coil part 4, to be bonded with each other in this low-tension coil part 4.
- the low-tension coil part 4 has a cylindrical bobbin 5 and a plurality of section collars 6 which are formed on the outer peripheral surface of the cylindrical bobbin 5 at prescribed intervals along its longitudinal direction.
- Lead wires 7 are wound on regions between the plurality of section collars 6 respectively.
- a plurality of lead wires 7 are wound on the outer peripheral surface of the cylindrical bobbin 5 by the so-called section winding.
- the cylindrical bobbin 5 is provided on its lower end with a flange part 5a, from which a plurality of terminal pins 8 are drawn out. Both ends of the lead wires 7 are connected to the terminal pins 8.
- the low-tension coil part 4 is inserted in a high-tension coil part 9 having a through hole 9a.
- the high-tension coil part 9 is formed by winding a lead wire 10 such as an enamel copper wire on the outer peripheral surface of a cylindrical bobbin 9b.
- the cylindrical bobbin 5 thereof is inserted in the through hole 9a of the cylindrical bobbin 9b forming the high-tension coil part 9, as shown by arrow A in Fig. 2.
- the cylindrical bobbin 5 is provided on its outer peripheral surface with the plurality of section collars 6. If the centers of the cylindrical bobbins 5 and 9b are not correctly aligned with each other, therefore, the section collars 6 collide with the cylindrical bobbin 9b, to break the cylindrical bobbin 5 or 9b. Therefore, the center of the cylindrical bobbin 5 forming the low-tension coil part 4 is correctly aligned with that of the cylindrical bobbin 9b, and the cylindrical bobbin 5 is carefully inserted in the cylindrical bobbin 9b. Thus, a long time is required for this inserting operation, leading to insufficient productivity.
- An object of the present invention is to provide a high-tension transformer, which overcomes the aforementioned disadvantages of the conventional high-tension transformer so that a low-tension coil part can be readily inserted in a high-tension coil part through a low-priced equipment.
- a high-tension transformer comprising a high-tension coil part having a through hole, and a low-tension coil part having a cylindrical bobbin which has a forward end portion and a base end portion, a plurality of section collars which are formed on an outer peripheral surface of the cylindrical bobbin at prescribed intervals along its longitudinal direction, and lead wires which are wound on regions between the plurality of section collars respectively.
- the low-tension coil part is inserted in the through hole of the high-tension coil part from the forward end portion of the cylindrical bobbin, while the cylindrical bobbin is provided on a forward end side of its outer peripheral surface with a tapered portion which is so tapered as to approach the outer peripheral surface of the cylindrical bobbin toward the forward end portion.
- the cylindrical bobbin forming the low-tension coil part is provided on its outer peripheral surface with the tapered portion which is so as to approach the outer peripheral surface of the cylindrical bobbin tapered toward the forward end portion.
- the low-tension coil part is smoothly inserted in the through hole of the high-tension coil part. Even if the center of the low-tension coil part slightly deviates from that of the through hole of the high-tension coil part, the low- and high-tension coil parts can be readily and correctly aligned with each other due to the action of the tapered portion.
- the tapered portion comes into contact with the inner wall of the through hole of the high-tension coil part to facilitate insertion of the low-tension coil part of the high-tension coil part so long as the forward end portion of the former is introduced into the through hole of the latter, whereby the center of the low-tension coil part is correctly aligned with that of the through hole.
- the feature of the present invention resides in that the cylindrical bobbin forming the low-tension coil part is provided on its outer peripheral surface with the tapered portion which is so tapered as to approach the outer peripheral surface of the cylindrical bobbin toward the forward end portion, and various modes are available for the structure of this tapered portion.
- sectional shapes of the section collars along the longitudinal direction of the cylindrical bobbin are so formed as to approach the outer peripheral surface of the cylindrical bobbin toward its forward end portion, whereby the section collars are provided with the tapered portion(s).
- the tapered portion When the tapered portion is thus defined by the section collar(s), the tapered portion may be provided on the section collar of the frontmost position which is closest to the forward end portion of the cylindrical bobbin. Further, this section collar may be formed by a plurality of section collars which are divided in the circumferential direction, or by that having a continuous shape in the circumferential direction.
- the sectional shapes of the plurality of section collars may be formed to have the aforementioned tapered portions respectively.
- all section collars may be formed to have the aforementioned tapered portions.
- the plurality of section collars which are arranged along the longitudinal direction of the cylindrical bobbin are so formed that outer edges thereof approach the outer peripheral surface of the cylindrical bobbin toward its forward end portion.
- the aforementioned tapered portion is formed by a member which is different from the section collars.
- the inventive transformer may further comprise an auxiliary member which is so tapered as to approach the outer peripheral surface of the cylindrical bobbin toward its forward end portion, and this auxiliary member is arranged at least on a forward end side of the section collar which is provided on the frontmost position in this case.
- This auxiliary member may be formed independently of the section collars at a prescribed distance therefrom, while the same is preferably integrally formed with the section collars.
- Fig. 3 is a schematic sectional view showing the overall structure of an FBT 21 according to the embodiment of the present invention.
- the FBT 21 has a core which is formed by a pair of core members 22 and 23.
- the core members 22 and 23 have pairs of leg portions 22a, 22b, 23a and 23b respectively.
- the leg portions 22a and 22b are bonded with the leg portions 23a and 23b through insulating adhesives (not shown) respectively.
- the core, having an angular-annular shape, which is formed by the core members 22 and 23 is inserted in a low-tension coil part 24 in the portion where the leg portions 22a and 23a are bonded with each other.
- the low-tension coil part 24 has a cylindrical bobbin 25 which is made of synthetic resin, for example.
- This cylindrical bobbin 25 is substantially cylindrical as a whole, and has a flange portion 25c on its base end portion 25b which is opposite to its forward end portion 25a.
- a plurality of section collars 26 and 27 are formed on an outer peripheral surface of the cylindrical bobbin 25.
- lead wires 28 are wound on the outer peripheral surface of the cylindrical bobbin 25 in regions between the plurality of section collars 26 and 27 respectively. Namely, a plurality of lead wires 28 are so section-wound that a plurality of wound portions are arranged along the longitudinal direction of the cylindrical bobbin 25. Both ends of the lead wires 28 are connected to terminal pins 29 which are drawn out from the flange portion 25c.
- the lead wires 28 can be formed by conductors such as enamel copper wires, for example, having insulation-coated surfaces.
- the low-tension coil part 24 is inserted in the high-tension coil part 30.
- the high-tension coil part 30 has a cylindrical bobbin 31 which is made of synthetic resin or a metal having an insulated surface, for example.
- a lead wire 32 consisting of an enamel coil wire or the like is wound on an outer peripheral surface of the cylindrical bobbin 31.
- the high-tension coil part 30 has a through hole 30a so that the aforementioned low-tension coil part 24 is inserted in this through hole 30a.
- a case 32 is mounted to enclose the high-tension coil part 30 receiving the low-tension coil part 24, and this case 32 is filled up with insulating resin (not shown).
- the feature of the FBT 21 according to this embodiment resides in that the cylindrical bobbin 25 forming the low-tension coil part 24 is provided on its outer peripheral surface with a tapered portion.
- Fig. 4 illustrates only the cylindrical bobbin 25 shown in Fig. 3 in a partially enlarged manner.
- the cylindrical bobbin 25 is provided with the plurality of section collars 26 and 27 which are arranged at prescribed intervals along its longitudinal direction. Such plurality of section collars 26 and 27 are also arranged along the circumferential direction respectively.
- the section collars 26 in proximity to the forward end portion 25a of the cylindrical bobbin 25, i.e., provided on the frontmost position, have shapes which are different from those of the remaining section collars 27.
- the section collars 26 have inclined surfaces 26a which are so formed that sections along the longitudinal direction of the cylindrical bobbin 25 approach the outer peripheral surface thereof toward the forward end portion 25a.
- the inclined surfaces 26a define the tapered portion of the present invention.
- the plurality of section collars 26 which are circumferentially arranged on the frontmost position of the cylindrical bobbin 25 have the inclined surfaces 26a, so that the plurality of section collars 26 define the tapered portion according to the present invention.
- the section collars 26 which are provided on the frontmost position have the aforementioned inclined surfaces 26a among those provided on the outer peripheral surface of the cylindrical bobbin 25, whereby the section collars 26 hardly interfere with the cylindrical bobbin 31 forming the high-tension coil part 30 when the low-tension coil part 24 is inserted in the through hole 30a of the high-tension coil part 30.
- the tapered portion is defined by the section collars 26, whereby the low-tension coil part 24 can be smoothly inserted in the high-tension coil part 30.
- FIG. 4 shows only the cylindrical bobbin 25 of the low-tension coil part 24, the aforementioned lead wires 28 are wound on the outer peripheral surface of the cylindrical bobbin 25 in advance of the insertion.
- the tapered portion is defined by providing the inclined surfaces 26a on the collars 26 which are located on the frontmost position among the plurality of section collars 26 and 27.
- the tapered portion of the present invention is not restricted to such an example alone.
- a single section collar 36 may be formed on the cylindrical bobbin 25 to be continuous along its circumferential direction, as that provided on the frontmost position.
- the section collar 36 inhibits no such drawing of the lead wire.
- the frontmost section collar 36 may be continuous along the circumferential direction.
- the section collars 26 located on the frontmost position may be provided with auxiliary members 47 on portions which are close to the forward end portion 25a of the cylindrical bobbin 25, as shown in Fig. 6.
- the auxiliary members 47 have inclined surfaces 47a which are so formed that sections along the longitudinal direction of the cylindrical bobbin 25 approach the outer peripheral surface of the cylindrical bobbin 25 toward the forward end portion 25a.
- the tapered portion of the present invention is defined by the inclined surfaces 47a of the auxiliary members 47. While all of the plurality of section collars 26 which are arranged on the frontmost position are provided with the auxiliary members 47 in Fig. 6, the section collars 26 may include those provided with no auxiliary members 47.
- the aforementioned auxiliary members 47 may be provided at least on a pair of section collars 26, to be opposed to each other through the cylindrical bobbin 25.
- auxiliary members 47 are arranged to be in contact with the section collars 26 provided on the frontmost position in Fig. 6, the same may alternatively be arranged on positions, separated from the section collars 26 provided on the frontmost position, which are closer to the forward end portion 25a.
- the auxiliary members 47 are preferably integrated with the section collars 26 provided on the frontmost position as shown in Fig. 5, so that it is possible to further reliably prevent the section collars 26 from breakage.
- the remaining section collars 27 may also define tapered portions.
- the plurality of remaining section collars 27 which are arranged at prescribed intervals along the longitudinal direction of the cylindrical bobbin 25 may also be provided with inclined surfaces 27a and 27b, thereby defining a plurality of tapered portions.
- the plurality of section collars 26 and 27 defining the tapered portions are so formed that outer edges thereof approach the outer peripheral surface of the cylindrical bobbin 25 toward the forward end portion 25a, as shown in Fig. 7.
- the present invention is not restricted to such an FBT. Namely, the present invention is applicable to an arbitrary high-tension transformer other than the FBT, so far as the same comprises a low-tension coil part and a high-tension coil part receiving the low-tension coil part, with a plurality of section collars which are formed on an outer peripheral surface of a cylindrical bobbin, forming the low-tension coil part, on which lead wires are section-wound.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
- Coils Of Transformers For General Uses (AREA)
- Insulating Of Coils (AREA)
Abstract
Description
- The present invention relates to a high-tension transformer having a low-tension coil part which is inserted in a through hole of a high-tension coil part, and more specifically, it relates to a high-tension transformer improved in a structure which is formed on an outer peripheral surface of a cylindrical bobbin forming a low-tension coil part.
- A flyback transformer (hereinafter referred to as an FBT) is known as a high-tension transformer having a low-tension coil part which is inserted in a through hole of a high-tension coil part. Such an FBT is employed for supplying a high dc voltage to an anode of a cathode ray tube of a television receiver or the like.
- Fig. 1 is a sectional view schematically illustrating the structure of the aforementioned FBT.
- This FBT 1 has a pair of
core members core members leg portions leg portions 2a and 3a as well as those of theleg portions leg portions 2a and 3a are inserted in a low-tension coil part 4, to be bonded with each other in this low-tension coil part 4. - The low-
tension coil part 4 has acylindrical bobbin 5 and a plurality ofsection collars 6 which are formed on the outer peripheral surface of thecylindrical bobbin 5 at prescribed intervals along its longitudinal direction.Lead wires 7 are wound on regions between the plurality ofsection collars 6 respectively. In other words, a plurality oflead wires 7 are wound on the outer peripheral surface of thecylindrical bobbin 5 by the so-called section winding. Thecylindrical bobbin 5 is provided on its lower end with a flange part 5a, from which a plurality ofterminal pins 8 are drawn out. Both ends of thelead wires 7 are connected to theterminal pins 8. - The low-
tension coil part 4 is inserted in a high-tension coil part 9 having a throughhole 9a. The high-tension coil part 9 is formed by winding alead wire 10 such as an enamel copper wire on the outer peripheral surface of acylindrical bobbin 9b. - In order to assemble the FBT 1, it is necessary to insert the low-
tension coil part 4 in the throughhole 9a of the high-tension coil part 9. Namely, it is necessary to wind thelead wires 7 on the regions which are held between the plurality ofsection collars 6 respectively on the outer peripheral surface of thecylindrical bobbin 5 forming the low-tension coil part 4, and to thereafter insert the low-tension coil part 4 in the throughhole 9a of the high-tension coil part 9. - This inserting operation is now described with reference to Fig. 2. Referring to Fig. 2, the
lead wires 7 of the low-tension coil part 4 are omitted while only thecylindrical bobbin 9b is illustrated with respect to the high-tension coil part 9. - After the low-
tension coil part 4 is assembled, thecylindrical bobbin 5 thereof is inserted in the throughhole 9a of thecylindrical bobbin 9b forming the high-tension coil part 9, as shown by arrow A in Fig. 2. However, thecylindrical bobbin 5 is provided on its outer peripheral surface with the plurality ofsection collars 6. If the centers of thecylindrical bobbins cylindrical bobbin 9b, to break thecylindrical bobbin cylindrical bobbin 5 forming the low-tension coil part 4 is correctly aligned with that of thecylindrical bobbin 9b, and thecylindrical bobbin 5 is carefully inserted in thecylindrical bobbin 9b. Thus, a long time is required for this inserting operation, leading to insufficient productivity. - While the low- and high-
tension coil parts - An object of the present invention is to provide a high-tension transformer, which overcomes the aforementioned disadvantages of the conventional high-tension transformer so that a low-tension coil part can be readily inserted in a high-tension coil part through a low-priced equipment.
- According to a wide aspect of the present invention, provided is a high-tension transformer comprising a high-tension coil part having a through hole, and a low-tension coil part having a cylindrical bobbin which has a forward end portion and a base end portion, a plurality of section collars which are formed on an outer peripheral surface of the cylindrical bobbin at prescribed intervals along its longitudinal direction, and lead wires which are wound on regions between the plurality of section collars respectively. The low-tension coil part is inserted in the through hole of the high-tension coil part from the forward end portion of the cylindrical bobbin, while the cylindrical bobbin is provided on a forward end side of its outer peripheral surface with a tapered portion which is so tapered as to approach the outer peripheral surface of the cylindrical bobbin toward the forward end portion.
- In the high-tension transformer according to the present invention, the cylindrical bobbin forming the low-tension coil part is provided on its outer peripheral surface with the tapered portion which is so as to approach the outer peripheral surface of the cylindrical bobbin tapered toward the forward end portion. In insertion of the low-tension coil part, therefore, the low-tension coil part is smoothly inserted in the through hole of the high-tension coil part. Even if the center of the low-tension coil part slightly deviates from that of the through hole of the high-tension coil part, the low- and high-tension coil parts can be readily and correctly aligned with each other due to the action of the tapered portion. Namely, the tapered portion comes into contact with the inner wall of the through hole of the high-tension coil part to facilitate insertion of the low-tension coil part of the high-tension coil part so long as the forward end portion of the former is introduced into the through hole of the latter, whereby the center of the low-tension coil part is correctly aligned with that of the through hole.
- Therefore, it is possible to smoothly insert the low-tension coil part in the high-tension coil part without much increasing the accuracy of an equipment, such as a robot or a sequencer block, for example, which is employed for this insertion. Thus, it is possible to reduce the cost required for the production equipment for the high-tension transformer. In addition, it is possible to reduce the operation time for inserting the low-tension coil part in the high-tension coil part due to no requirement for correct alignment, thereby improving productivity also in this point.
- As hereinabove described, the feature of the present invention resides in that the cylindrical bobbin forming the low-tension coil part is provided on its outer peripheral surface with the tapered portion which is so tapered as to approach the outer peripheral surface of the cylindrical bobbin toward the forward end portion, and various modes are available for the structure of this tapered portion.
- According to a specific aspect of the present invention, sectional shapes of the section collars along the longitudinal direction of the cylindrical bobbin are so formed as to approach the outer peripheral surface of the cylindrical bobbin toward its forward end portion, whereby the section collars are provided with the tapered portion(s).
- When the tapered portion is thus defined by the section collar(s), the tapered portion may be provided on the section collar of the frontmost position which is closest to the forward end portion of the cylindrical bobbin. Further, this section collar may be formed by a plurality of section collars which are divided in the circumferential direction, or by that having a continuous shape in the circumferential direction.
- Alternatively, the sectional shapes of the plurality of section collars may be formed to have the aforementioned tapered portions respectively. Namely, all section collars may be formed to have the aforementioned tapered portions. Preferably, the plurality of section collars which are arranged along the longitudinal direction of the cylindrical bobbin are so formed that outer edges thereof approach the outer peripheral surface of the cylindrical bobbin toward its forward end portion.
- According to another specific aspect of the present invention, the aforementioned tapered portion is formed by a member which is different from the section collars. Namely, the inventive transformer may further comprise an auxiliary member which is so tapered as to approach the outer peripheral surface of the cylindrical bobbin toward its forward end portion, and this auxiliary member is arranged at least on a forward end side of the section collar which is provided on the frontmost position in this case. This auxiliary member may be formed independently of the section collars at a prescribed distance therefrom, while the same is preferably integrally formed with the section collars.
- The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
-
- Fig. 1 is a schematic sectional view for illustrating the overall structure of a conventional FBT;
- Fig. 2 is a schematic partially fragmented sectional view for illustrating a step of inserting a low-tension coil part in a high-tension coil part in the conventional FBT;
- Fig. 3 is a schematic sectional view for illustrating the overall structure of an FBT according to an embodiment of the present invention;
- Fig. 4 is a partially fragmented side elevational view showing the appearance of a cylindrical bobbin employed in the FBT according to the embodiment of the present invention;
- Fig. 5 is a partially fragmented side elevational view showing a first modification of the cylindrical bobbin employed in the FBT according to the embodiment of the present invention;
- Fig. 6 is a partially fragmented side sectional view showing a second modification of the cylindrical bobbin employed in the FBT according to the embodiment of the present invention; and
- Fig. 7 is a partially fragmented side sectional view showing a third modification of the cylindrical bobbin employed in the FBT according to the embodiment of the present invention.
- An embodiment of the present invention which is applied to an FBT serving as an exemplary high-tension transformer is now described with reference to the drawings.
- Fig. 3 is a schematic sectional view showing the overall structure of an FBT 21 according to the embodiment of the present invention.
- The FBT 21 has a core which is formed by a pair of
core members core members leg portions leg portions leg portions 23a and 23b through insulating adhesives (not shown) respectively. The core, having an angular-annular shape, which is formed by thecore members tension coil part 24 in the portion where theleg portions 22a and 23a are bonded with each other. - The low-
tension coil part 24 has acylindrical bobbin 25 which is made of synthetic resin, for example. Thiscylindrical bobbin 25 is substantially cylindrical as a whole, and has aflange portion 25c on itsbase end portion 25b which is opposite to itsforward end portion 25a. A plurality ofsection collars cylindrical bobbin 25. Further,lead wires 28 are wound on the outer peripheral surface of thecylindrical bobbin 25 in regions between the plurality ofsection collars lead wires 28 are so section-wound that a plurality of wound portions are arranged along the longitudinal direction of thecylindrical bobbin 25. Both ends of thelead wires 28 are connected toterminal pins 29 which are drawn out from theflange portion 25c. - The
lead wires 28 can be formed by conductors such as enamel copper wires, for example, having insulation-coated surfaces. - The low-
tension coil part 24 is inserted in the high-tension coil part 30. The high-tension coil part 30 has acylindrical bobbin 31 which is made of synthetic resin or a metal having an insulated surface, for example. Alead wire 32 consisting of an enamel coil wire or the like is wound on an outer peripheral surface of thecylindrical bobbin 31. - Since the
cylindrical bobbin 31 has a cylindrical shape, the high-tension coil part 30 has a through hole 30a so that the aforementioned low-tension coil part 24 is inserted in this through hole 30a. - Further, a
case 32 is mounted to enclose the high-tension coil part 30 receiving the low-tension coil part 24, and thiscase 32 is filled up with insulating resin (not shown). - The feature of the FBT 21 according to this embodiment resides in that the
cylindrical bobbin 25 forming the low-tension coil part 24 is provided on its outer peripheral surface with a tapered portion. Fig. 4 illustrates only thecylindrical bobbin 25 shown in Fig. 3 in a partially enlarged manner. Thecylindrical bobbin 25 is provided with the plurality ofsection collars section collars - The
section collars 26 in proximity to theforward end portion 25a of thecylindrical bobbin 25, i.e., provided on the frontmost position, have shapes which are different from those of the remainingsection collars 27. Namely, thesection collars 26 have inclinedsurfaces 26a which are so formed that sections along the longitudinal direction of thecylindrical bobbin 25 approach the outer peripheral surface thereof toward theforward end portion 25a. Namely, theinclined surfaces 26a define the tapered portion of the present invention. According to this embodiment, the plurality ofsection collars 26 which are circumferentially arranged on the frontmost position of thecylindrical bobbin 25 have theinclined surfaces 26a, so that the plurality ofsection collars 26 define the tapered portion according to the present invention. - In the FBT 21 according to this embodiment, the
section collars 26 which are provided on the frontmost position have the aforementionedinclined surfaces 26a among those provided on the outer peripheral surface of thecylindrical bobbin 25, whereby thesection collars 26 hardly interfere with thecylindrical bobbin 31 forming the high-tension coil part 30 when the low-tension coil part 24 is inserted in the through hole 30a of the high-tension coil part 30. Further, the tapered portion is defined by thesection collars 26, whereby the low-tension coil part 24 can be smoothly inserted in the high-tension coil part 30. When the center of thecylindrical bobbin 25 slightly deviates from that of the through hole 30a provided in the high-tension coil part 30, theinclined surfaces 26a of thesection collars 26 come into contact with thecylindrical bobbin 31 of the high-tension coil part 30 upon insertion of the low-tension coil part 24. Since theinclined surfaces 26a of thesection collars 26 are in contact with a wall surface of thecylindrical bobbin 31 upon such insertion, the center of thecylindrical bobbin 25 is correctly aligned with that of the through hole 30a. Thus, it is possible to smoothly insert the low-tension coil 24 in the through hole 30a of the high-tension coil part 30. - While Fig. 4 shows only the
cylindrical bobbin 25 of the low-tension coil part 24, theaforementioned lead wires 28 are wound on the outer peripheral surface of thecylindrical bobbin 25 in advance of the insertion. - In the aforementioned embodiment, the tapered portion is defined by providing the
inclined surfaces 26a on thecollars 26 which are located on the frontmost position among the plurality ofsection collars - As shown in Fig. 5, for example, a
single section collar 36 may be formed on thecylindrical bobbin 25 to be continuous along its circumferential direction, as that provided on the frontmost position. When a lead wire which is wound at the back of thesection collar 36 provided on the frontmost position is drawn out, thesection collar 36 inhibits no such drawing of the lead wire. Thus, thefrontmost section collar 36 may be continuous along the circumferential direction. - Alternatively, the
section collars 26 located on the frontmost position may be provided withauxiliary members 47 on portions which are close to theforward end portion 25a of thecylindrical bobbin 25, as shown in Fig. 6. Theauxiliary members 47 have inclined surfaces 47a which are so formed that sections along the longitudinal direction of thecylindrical bobbin 25 approach the outer peripheral surface of thecylindrical bobbin 25 toward theforward end portion 25a. Thus, the tapered portion of the present invention is defined by the inclined surfaces 47a of theauxiliary members 47. While all of the plurality ofsection collars 26 which are arranged on the frontmost position are provided with theauxiliary members 47 in Fig. 6, thesection collars 26 may include those provided with noauxiliary members 47. In order to facilitate alignment for inserting thecylindrical bobbin 25 in the through hole 30a of the high-tension coil part 30, the aforementionedauxiliary members 47 may be provided at least on a pair ofsection collars 26, to be opposed to each other through thecylindrical bobbin 25. - While the
auxiliary members 47 are arranged to be in contact with thesection collars 26 provided on the frontmost position in Fig. 6, the same may alternatively be arranged on positions, separated from thesection collars 26 provided on the frontmost position, which are closer to theforward end portion 25a. However, theauxiliary members 47 are preferably integrated with thesection collars 26 provided on the frontmost position as shown in Fig. 5, so that it is possible to further reliably prevent thesection collars 26 from breakage. - While the tapered portions are defined by the
section collars section collars 27 may also define tapered portions. As shown in Fig. 7, for example, the plurality of remainingsection collars 27 which are arranged at prescribed intervals along the longitudinal direction of thecylindrical bobbin 25 may also be provided withinclined surfaces section collars cylindrical bobbin 25 toward theforward end portion 25a, as shown in Fig. 7. - While the above description has been made with reference to an embodiment which is applied to an FBT, the present invention is not restricted to such an FBT. Namely, the present invention is applicable to an arbitrary high-tension transformer other than the FBT, so far as the same comprises a low-tension coil part and a high-tension coil part receiving the low-tension coil part, with a plurality of section collars which are formed on an outer peripheral surface of a cylindrical bobbin, forming the low-tension coil part, on which lead wires are section-wound.
- Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present invention being limited only by the terms of the appended claims.
Claims (9)
- A high-tension transformer comprising:
a high-tension coil part having a through hole; and
a low-tension coil part having a cylindrical bobbin being provided with a forward end portion and a base end portion, a plurality of section collars being formed on an outer peripheral surface of said cylindrical bobbin at prescribed intervals along its longitudinal direction, and lead wires being wound on regions between said plurality of section collars respectively,
said low-tension coil part being inserted in said through hole of said high-tension coil part from said forward end portion of said cylindrical bobbin,
said cylindrical bobbin being provided on a forward end side of its outer peripheral surface with a tapered portion being so tapered as to approach said outer peripheral surface of said cylindrical bobbin toward said forward end portion. - The high-tension transformer in accordance with claim 1, wherein said section collars have sectional shapes along said longitudinal direction of said cylindrical bobbin being so formed as to approach said outer peripheral surface of said cylindrical bobbin toward said forward end portion, thereby defining said tapered portion.
- The high-tension transformer in accordance with claim 2, wherein said tapered portion is formed by that of said plurality of section collars being arranged on a position being closest to said forward end portion of said cylindrical bobbin.
- The high-tension transformer in accordance with claim 3, wherein said section collar being arranged on said position being closest to said forward end portion of said cylindrical bobbin consists of a plurality of section collars being divided in the circumferential direction.
- The high-tension transformer in accordance with claim 3, wherein said section collar being arranged on said position being closest to said forward end portion of said cylindrical bobbin has a continuous shape along the circumferential direction.
- The high-tension transformer in accordance with claim 1, further comprising an auxiliary member being so tapered as to approach said outer peripheral surface of said cylindrical bobbin toward said forward end portion of said cylindrical bobbin,
said auxiliary member being arranged on a forward end side of that of said section collars being located on a frontmost position. - The high-tension transformer in accordance with claim 6, wherein said auxiliary member is integrally formed with said section collar being located on said frontmost position on its forward end side.
- The high-tension transformer in accordance with claim 1, wherein said plurality of section collars are provided with tapered portions so that respective sectional shapes of said plurality of section collars approach said outer peripheral surface of said cylindrical bobbin toward said forward end portion.
- The high-tension transformer in accordance with claim 1, being a flyback transformer.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6011441A JPH07220964A (en) | 1994-02-03 | 1994-02-03 | High-voltage transformer |
JP11441/94 | 1994-02-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0666579A1 true EP0666579A1 (en) | 1995-08-09 |
EP0666579B1 EP0666579B1 (en) | 1997-04-02 |
Family
ID=11778188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95101308A Expired - Lifetime EP0666579B1 (en) | 1994-02-03 | 1995-01-31 | High-tension transformer |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0666579B1 (en) |
JP (1) | JPH07220964A (en) |
KR (1) | KR0167120B1 (en) |
DE (1) | DE69500203T2 (en) |
ES (1) | ES2100748T3 (en) |
MY (1) | MY111777A (en) |
TW (1) | TW301753B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3018665A1 (en) * | 2014-11-10 | 2016-05-11 | SMA Solar Technology AG | Low inter-winding capacitance coil form |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008524433A (en) | 2004-12-21 | 2008-07-10 | ハネウェル・インターナショナル・インコーポレーテッド | Stabilized iodocarbon composition |
TWI291185B (en) | 2005-01-17 | 2007-12-11 | Honda Motor Co Ltd | Bobbinless coil and method of manufacturing the same |
CN110176344A (en) * | 2019-05-21 | 2019-08-27 | 保定天威保变电气股份有限公司 | A kind of transformer division change connection group structure |
WO2024076195A1 (en) * | 2022-10-07 | 2024-04-11 | 엘지이노텍(주) | Transformer and power supply unit using same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2404358A1 (en) * | 1977-09-26 | 1979-04-20 | Murata Manufacturing Co | CATHOSCOPE SCAN FEEDBACK TRANSFORMER |
DE2838174A1 (en) * | 1978-09-01 | 1980-03-13 | Philips Patentverwaltung | HV low power transformer coil - has two coaxial ribbed cylindrical formers with winding sections linked in series between ends |
-
1994
- 1994-02-03 JP JP6011441A patent/JPH07220964A/en active Pending
-
1995
- 1995-01-28 KR KR1019950001754A patent/KR0167120B1/en not_active IP Right Cessation
- 1995-01-31 EP EP95101308A patent/EP0666579B1/en not_active Expired - Lifetime
- 1995-01-31 DE DE69500203T patent/DE69500203T2/en not_active Expired - Fee Related
- 1995-01-31 ES ES95101308T patent/ES2100748T3/en not_active Expired - Lifetime
- 1995-02-03 MY MYPI95000243A patent/MY111777A/en unknown
- 1995-02-07 TW TW084100937A patent/TW301753B/zh active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2404358A1 (en) * | 1977-09-26 | 1979-04-20 | Murata Manufacturing Co | CATHOSCOPE SCAN FEEDBACK TRANSFORMER |
DE2838174A1 (en) * | 1978-09-01 | 1980-03-13 | Philips Patentverwaltung | HV low power transformer coil - has two coaxial ribbed cylindrical formers with winding sections linked in series between ends |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3018665A1 (en) * | 2014-11-10 | 2016-05-11 | SMA Solar Technology AG | Low inter-winding capacitance coil form |
US11217377B2 (en) | 2014-11-10 | 2022-01-04 | Sma Solar Technology Ag | Low inter-winding capacitance coil form |
Also Published As
Publication number | Publication date |
---|---|
JPH07220964A (en) | 1995-08-18 |
KR0167120B1 (en) | 1999-01-15 |
DE69500203D1 (en) | 1997-05-07 |
MY111777A (en) | 2000-12-30 |
DE69500203T2 (en) | 1997-09-25 |
ES2100748T3 (en) | 1997-06-16 |
TW301753B (en) | 1997-04-01 |
EP0666579B1 (en) | 1997-04-02 |
KR950034311A (en) | 1995-12-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4429358A (en) | Flyback transformer | |
GB2339497A (en) | Transformer and method of assembling it | |
US4623754A (en) | Element installation arrangement for installing an element in a flyback transformer | |
EP0666579B1 (en) | High-tension transformer | |
GB2030784A (en) | High voltage transformers | |
US4339630A (en) | Bushing design with crimped adapter for retaining conductor | |
KR100287606B1 (en) | Deflection yoke | |
JP2001035732A (en) | Transformer for switching regulator | |
JP3344954B2 (en) | Coil parts using a terminal holder separate from the bobbin | |
JP2734923B2 (en) | High voltage transformer | |
JPS5936889Y2 (en) | flyback transformer | |
JP3321730B2 (en) | Small transformer | |
JP3362524B2 (en) | Flyback transformer | |
KR910001019Y1 (en) | Flyback transformer | |
JP3409009B2 (en) | Switching transformer | |
KR100388599B1 (en) | A FBT having one body style bobbin | |
JPS5938030Y2 (en) | flyback transformer | |
KR100330998B1 (en) | Pin for connecting of PCB of deflection yoke | |
JPH11307365A (en) | Converter transformer | |
JP3097156B2 (en) | Deflection yoke | |
KR200249549Y1 (en) | A FBT having one body style bobbin | |
EP0590547A1 (en) | A frame body for use in winding a coil for deflection yoke | |
JPH1012470A (en) | High voltage transformer and its manufacturing method | |
KR890001348Y1 (en) | High-voltage bobin of flyback transformer | |
KR200234413Y1 (en) | High Voltage Bobbin Terminal Terminal of Flyback Transformer |
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 ES FR GB IT NL PT |
|
17P | Request for examination filed |
Effective date: 19950721 |
|
17Q | First examination report despatched |
Effective date: 19950914 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT NL PT |
|
REF | Corresponds to: |
Ref document number: 69500203 Country of ref document: DE Date of ref document: 19970507 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2100748 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 19970403 |
|
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: ES Payment date: 20080218 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PT Payment date: 20080116 Year of fee payment: 14 Ref country code: NL Payment date: 20080103 Year of fee payment: 14 Ref country code: IT Payment date: 20080128 Year of fee payment: 14 Ref country code: GB Payment date: 20080130 Year of fee payment: 14 Ref country code: DE Payment date: 20080124 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20080108 Year of fee payment: 14 |
|
REG | Reference to a national code |
Ref country code: PT Ref legal event code: MM4A Free format text: LAPSE DUE TO NON-PAYMENT OF FEES Effective date: 20090731 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20090131 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20090801 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090731 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090801 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20091030 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090801 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090131 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20090202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090202 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090131 |