JPH0573922U - Coil bobbin with insulating tube - Google Patents

Abstract

(57) [Summary] [Purpose] To construct a high-voltage transformer that uses a vertical coil bobbin with a winding tube mounted vertically on the surface of the pedestal, a small and high-voltage side winding The purpose is to obtain a coil bobbin that can reliably electrically insulate between windings on the voltage side. [Structure] A winding cylinder 6 in which a magnetic leg of a magnetic core is attached to the center of a pedestal 2 in which terminals 3a and 3b are planted at both ends and a winding is wound.
And an insulating cylinder positioning groove 5 for fitting and welding the tip of the insulating cylinder 4 mounted on the upper collar 1 around the winding cylinder 6, and an impregnation hole 9 and a lead wire drawing hole 8 inside the insulating cylinder positioning groove 5. Pedestal 2 and inner winding tube 7 to be inserted inside the winding tube 6
And the upper collar 1 to which the insulating cylinder 4 which fits into the insulating cylinder positioning groove 5 of the pedestal 2 and whose tip is welded is attached to the outer circumference of the inner winding cylinder 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coil bobbin with an insulating cylinder for a high-voltage transformer in a power supply device for lighting a cathode tube or the like.

[0002]

[Prior Art]

 Conventionally, this type of high-voltage transformer has a high voltage of 1500 V to 2000 V on the secondary winding, so multiple windings are attached to the winding cylinder that winds the winding, and the winding is divided into separate windings. The structure is such that the wire at the beginning and end of the winding does not come close to each other. The insulation between the primary winding side on the low voltage side and the secondary winding side on the high voltage side is insulation tape between layers or a thread made of insulating material for small ones. Was wound between the layers of the primary winding and the secondary winding, but it lacked workability, and because multiple flanges were attached to the winding cylinder, the winding frame became large in the lengthwise direction, and There is a drawback that the shape becomes large.

[0003]

[Problems to be solved by the device]

 Since the present invention is a vertical transformer in which a high output voltage can be obtained and which is highly reliable and small, the magnetic core is erected vertically on the surface of the pedestal. In order to separate the wires, the coil bobbin has a winding on the low voltage side and an upper collar with an insulating cylinder that insulates the high voltage side from the low voltage side, and a winding cylinder for the winding on the high voltage side. It is separated from the pedestal, and the tip of the upper rim side insulation tube is ultrasonically welded to the pedestal to completely insulate the low voltage side winding from the public voltage side winding by the insulation tube. It is an object of the present invention to provide a coil bobbin with an insulating cylinder that can reliably insulate a winding that generates a high voltage and a winding on the low voltage side.

[0004]

[Means for Solving the Problems]

 In the present invention, the high-voltage side output terminal, the low-voltage side output, and the low-voltage side terminal for pulling out the primary side winding are mounted on both sides of the pedestal, and the magnetic leg of the magnetic core is inserted in the center of the pedestal. This is a vertical coil bobbin in which the winding cylinder that winds the winding is mounted perpendicularly to the surface of the pedestal, and the winding frame with the collar attached to the tip of the winding cylinder is assembled to the pedestal. Position the insulating cylinder of the upper collar, which will be described later, on the winding cylinder where the legs are inserted and assembled, and the pedestal to which the winding cylinder is attached. Attach the inner winding that is installed inside the pedestal-side winding and the insulating cylinder on the outer periphery of the inner winding that electrically isolates the low-voltage winding and the high-voltage winding from each other. The upper collar is impregnated by passing the varnish through the winding on the high voltage side when impregnating the varnish. Similarly, the pedestal also has an impregnation hole that runs inside the high-voltage winding that is wound during varnish impregnation, and a lead wire drawing hole that draws out the lead wire, inside the winding cylinder root and insulation cylinder positioning groove. The coil is mounted on the pedestal, the winding on the pedestal side is wound on the public voltage side, and the upper flange with the inner winding and the insulation cylinder attached is fitted to the pedestal, and the insulating cylinder on the pedestal is insulated from the upper flange. The tip of the cylinder is welded, and the low voltage side winding is wound on the insulating cylinder to make a high voltage transformer using a coil bobbin with an insulating cylinder.

That is, according to the present invention, terminals are planted at both ends, a magnetic leg of a magnetic core is incorporated in the center, and a winding is wound around the outer circumference, and a winding cylinder is provided around the winding cylinder. An insulating cylinder positioning groove for fitting and welding the tip of the insulating cylinder of the collar, at least one impregnation hole penetrating a pedestal provided inside the insulating cylinder positioning groove, a position in contact with the winding cylinder, and the insulating cylinder Attach the pedestal with the lead wire lead-out hole attached near the positioning groove, and the inner winding tube that is inserted inside the winding tube of the pedestal at the center of the collar and incorporates the magnetic leg of the magnetic core inside. , An insulating cylinder mounted on the outer circumference of the inner winding cylinder at a position corresponding to the insulating cylinder positioning groove of the pedestal, and at least one impregnation hole penetrating the flange surface on which the inner winding cylinder and the insulating cylinder are mounted. With the upper collar installed, insert the inner reel of the upper collar into the reel of the pedestal to disconnect the pedestal. A coil bobbin with an insulating tube, characterized in that the edge tube positioning groove and the insulating tube of the upper collar are fitted and welded together.

[0006]

[Action]

 The winding tube provided on the pedestal serves as the winding core of the high-voltage side winding, and the winding tube provided on the upper collar is the inner winding tube that is inserted inside the winding tube of the pedestal, and is inserted inside the winding tube of the pedestal. Then, the creepage distance between the magnetic core and the magnetic leg is increased to increase the electrical insulation voltage between the magnetic core and the magnetic core. The upper collar insulating cylinder fits into the insulating cylinder positioning groove provided on the surface of the pedestal and is ultrasonically welded, so the high voltage side winding and the low voltage side winding are electrically isolated and insulated, and the high voltage side winding Lead wire of the lead wire is pulled out to the terminal through the lower surface of the pedestal through the lead wire lead-out hole that is attached in contact with the winding tube, and at the end of the lead wire lead-out hole that is attached near the insulation positioning groove. The lead wire is pulled out to the terminal along the groove on the bottom of the pedestal and connected to the terminal. The lead wire between the lead wire lead-out hole and the terminal is adhesively fixed to the pedestal with adhesive adhesive tape on one side. At this time, the high voltage winding part is easily impregnated with varnish to complete the electrical insulation process.

[0007]

【Example】

 FIG. 1 is an external perspective view showing a state in which a coil bobbin with an insulating cylinder according to the present invention is provided with a winding on the high voltage side and the upper collar side and the pedestal side are ultrasonically welded, and FIG. 2 is a perspective view showing the upper collar and the pedestal. FIG. 3 is a perspective view showing the structure of a separated coil bobbin with an insulating cylinder according to the present invention. At the center of the pedestal 2 in which the terminals 3a and 3b are planted on both sides, a winding cylinder 6 for winding the high-voltage side winding 10 is attached integrally with the pedestal 2, and the circumference of the winding cylinder 6 is An insulating cylinder positioning groove 5 for positioning ultrasonic welding of an insulating cylinder 4 of an upper collar 1 described later is provided at a symmetrical position with respect to the winding cylinder 6. Further, two lead wire lead-out holes 8 are provided inside the pedestal at a position in contact with the winding cylinder and the insulating cylinder positioning groove, and the surface of the pedestal 2 is varnished when the high-voltage side winding is impregnated with a blank varnish. At least one impregnation hole for varnish impregnation is attached to the winding on the high voltage side. An inner winding cylinder 7 incorporating a magnetic leg of a magnetic core is attached to the center of the upper collar 1, and the inner winding cylinder is sized to fit inside the winding cylinder 6 of the pedestal 2. An insulating cylinder 4 is attached to the outer circumference of the inner winding cylinder centering on the inner winding cylinder. The insulating cylinder 4 is formed at a position to be fitted into the insulating cylinder positioning groove of the pedestal, and After winding the high voltage side winding, the lead wire is soldered to the lead terminal 3a through the lead wire lead hole 8 and the pedestal 2 is covered with the upper brim 1 and the end face of the insulating cylinder 4 and the insulating cylinder positioning groove 5 are superposed. After welding by sonic welding, etc., the low voltage side winding and the primary side winding are wound on the insulating cylinder 4, the lead wire is soldered to the terminal 3b, and the coil bobbin with the rear winding is vacuum impregnated with varnish. Electrically insulate the winding. The high-voltage winding wire wound around the pedestal winding tube is a heat-sealing electric wire, or a wire that uses a wire whose surface becomes sticky when a solvent is applied. Is received by a collar provided on the end face of the winding jig, the high voltage side winding is wound between them, and after winding, the wire is solidified by adhering between the windings using a solvent and the pedestal is taken out from the winding jig. In the embodiments of the present invention, the shapes of the winding cylinder, the insulating cylinder, and the brim have been described as quadrangular shapes. However, it is obvious that the present invention can be implemented with circular or elliptical shapes.

[0008]

[Effect of the device]

 The winding cylinder and the insulating cylinder positioning groove provided on the pedestal, the inner winding cylinder and the insulating cylinder provided on the upper collar, the impeller at least one hole on the upper collar of the pedestal, and the pedestal and the upper collar combined, Since this is a coil bobbin with an insulating cylinder, which is formed by fitting and welding the tip of the insulating cylinder of the upper collar to the insulating cylinder positioning groove of the pedestal, wind the high-voltage side winding around the winding cylinder and It is a coil bobbin with an insulating tube that is insulated by an insulating tube, wound on the upper surface of the insulating tube on the low voltage side, and impregnated with a high-voltage winding by impregnating a vacuum varnish. By using the coil bobbin with the insulating cylinder according to the present invention, it is possible to obtain a vertical type high voltage transformer having a small size and a high electric insulation voltage characteristic.

[Brief description of drawings]

FIG. 1 is an external perspective view of a coil bobbin with an insulating cylinder according to the present invention.

FIG. 2 is an exploded perspective view showing an upper collar and a pedestal of a coil bobbin with an insulating cylinder according to the present invention.

[Explanation of symbols]

 1 Upper collar 2 Pedestal 3a, 3b Terminal 4 Insulation cylinder 5 Insulation cylinder positioning groove 6 Winding cylinder 7 Inner winding cylinder 8 Lead wire drawing hole 9 Impregnation hole 10 High voltage side winding 11 Tsuba

Claims (1)

[Scope of utility model registration request] 1. An insulation of a winding cylinder in which terminals are planted at both ends, a magnetic leg of a magnetic core is incorporated in the center, and a winding is wound around the outer circumference, and an upper collar provided around the winding cylinder around the winding cylinder. An insulating cylinder positioning groove for fitting and welding the tip of the cylinder, at least one impregnation hole penetrating a pedestal provided inside the insulating cylinder positioning groove, a position in contact with the winding cylinder, and close to the insulating cylinder positioning groove The pedestal with the lead wire drawing hole attached at the position, and the inner winding tube that is inserted inside the winding tube of the pedestal and that incorporates the magnetic legs of the magnetic core in the center of the collar, and the outer circumference of the inner winding tube. An insulating cylinder attached to a position corresponding to the insulating cylinder positioning groove of the pedestal, and an upper flange provided with at least one impregnation hole penetrating the inner winding cylinder and the flange surface on which the insulating cylinder is attached. , Insert the inner reel of the upper collar into the reel of the pedestal, and insert it into the insulating barrel positioning groove of the pedestal and the upper collar. A coil bobbin with an insulating tube, characterized in that the above insulating tube is fitted and welded.