High-voltage variable resistor

Abstract

A high-voltage variable resistor includes an insulating-resin front case, and an insulating-resin rear case fitted to the front case. The front case further includes a circuit board having a circuit pattern including a resistive element, and a slider that is slidable on the resistive element. The rear case includes a capacitor housing for accommodating a capacitor, and a terminal guide for accommodating an external connection terminal. The capacitor housing and the terminal guides are integrally molded with the rear case.

1 - 11 . (canceled)  
   
   
       12 . A high-voltage variable resistor comprising: 
 an insulating-resin front case including: 
 a circuit board having a circuit pattern including at least one resistive element; and  
 at least one slider that is slidable on the resistive element; and  
   an insulating-resin rear case fitted to the insulating-resin front case including: 
 a capacitor housing for accommodating at least one capacitor; and  
 a terminal guide for accommodating an external connection terminal, the capacitor housing and the terminal guide being integrally molded with the insulating-resin rear case; and  
   at least one capacitor disposed in said capacitor housing of the insulating-resin rear case; wherein    the insulating-resin front case and the insulating-resin rear case are arranged to be disposed on a front side of another circuit board such that neither of the insulating-resin front case nor the insulating-resin rear case is disposed on a rear side of the another circuit board.    
   
   
       13 . The high-voltage variable resistor according to  claim 12 , wherein the at least one capacitor includes a plurality of capacitors, each of the plurality of capacitors is provided with a lead terminal, the capacitor housing contains the plurality of capacitors provided with the lead terminal, and the capacitor housing is sealed with resin.  
   
   
       14 . The high-voltage variable resistor according to  claim 13 , further comprising an insulating-resin partition wall provided in the capacitor housing arranged to electrically isolate the lead terminals of the plurality of capacitors.  
   
   
       15 . The high-voltage variable resistor according to  claim 14 , wherein the partition wall is a plate disposed on a grooved holder provided in the capacitor housing, and the upper portion of the partition wall protrudes above the lead terminals and toward the rear surface of the circuit board.  
   
   
       16 . The high-voltage variable resistor according to  claim 14 , wherein the partition wall is integrally molded with the insulating-resin rear case and then separated from the insulating-resin rear case.  
   
   
       17 . The high-voltage variable resistor according to  claim 12 , wherein the at least one slider includes a plurality of the sliders that are arranged on the resistive element for varying the resistance of the resistive element.  
   
   
       18 . The high-voltage variable resistor according to  claim 12 , wherein the at least one resistive element includes resistive elements for adjusting focus voltages and resistive elements for adjusting screen voltages.  
   
   
       19 . The high-voltage variable resistor according to  claim 12 , wherein resin is provided in only the capacitor housing in the rear case.  
   
   
       20 . The high-voltage variable resistor according to  claim 12 , further comprising a contact electrode on a rear surface of the circuit board, the contact electrode being electrically connected to the circuit pattern.  
   
   
       21 . The high-voltage variable resistor according to  claim 20 , further comprising a conductive rubber piece, wherein the contact electrode is electrically connected via the conductive rubber piece to the external connection terminal in the terminal wide.  
   
   
       22 . The high-voltage variable resistor according to  claim 12 , the insulating-resin rear case includes a plurality of rubber holders for holding a plurality of conductive rubber pieces therein.  
   
   
       23 . The high-voltage variable resistor according to  claim 22 , wherein the insulating-resin front case includes a plurality of contact electrodes on a rear surface of the circuit board, the insulating-resin rear case includes a plurality of external connection terminals, and the plurality of conductive rubber pieces electrically connect each of the plurality of contact electrodes to a respective one of the plurality of external connection terminals.