CN1153392A - Flyback transformer - Google Patents

Abstract

This transformer is provided with the following: a main body case 13 which accommodates a high voltage coil in the inside and has an aperture toward a focus pack case 19 side, an intermediate member 24 which fixes conductive rubber 23 penetrating from the main body case 13 side to the focus pack case 19 side and has the size closing the aperture of the main case 13, and the focus pack case 19 which accommodates a resistor 9 connecting metal terminals 25. Lead wires of the high voltage coil 3 are stuck into the conductive rubber 23. The intermediate member 24 is fitted to the main body case 13, and closes the aperture of the main body case 13. Insulating material 21 is injected in a space divided and formed by the main body case 13 and the intermediate member 24 and hardened. The focus pack case 19 is fitted to the intermediate member 24, and a part of the metal terminals 25 is stuck into the conducting rubber 23. Thus the high voltage coil 3 is connected with the resistor 9.

Description

Kickback transformer

The present invention relates to provides high voltage to the cathode ray tube of television receiver, color monitor etc., and simultaneously the target ray tube provides the kickback transformer of focus voltage and corresponding essential screen grid voltage.Stress and mentioned the problem that improves the productivity ratio aspect of kickback transformer.

The kickback transformer of television receiver etc., the high voltage of generation 20-30KV is providing dc high voltage in the anode of cathode ray tube, and the focus voltage of 5-10KV, the screen grid voltage of 100-1000V are provided.

Figure 15 represents the circuit diagram of the connection status of kickback transformer, cathode ray tube and high-tension coil etc.In Figure 15, the 1st, kickback transformer is made of low-voltage coil 2, high-tension coil 3 and diode 4 etc.The 5th, cathode ray tube, the output electrode 6 and 6 of kickback transformer 1 ' with 6 " be connected, electrode 6 ', 6 " be by the output electrode that is assembled in the electric resistance partial pressure gained voltage in the kickback transformer 1.

This resistance system constitutes with fixed resistor 7a, 7c, 7e and variable resistance 7b, 7d's, and usually being referred to as these resistance is focus pack.The 8th, film capacitor.The 36th, high voltage resistor.

Figure 16 is illustrated in the figure of the ceramic resistor 9 that uses in the kickback transformer 1.Resistor 9 is on ceramic substrate 10 resistive element 11 to be printed sintering to form.7a ', 7c ', 7e ' are that fixed resistance portion, 7b ', 7d ' are variable resistance parts, and 12a-12d is an electrode, and 12a is the high pressure input electrode of resistor 9, and 12b, 12c are focusing, screen grid voltage extraction electrode, and 12d is a grounding electrode.

Figure 17 represents the cutaway view of kickback transformer, and is attached with identical numbering sign indicating number on the parts identical with Figure 15.In the main body machine phase 13 that the plastics of kickback transformer 1 are made, deposit the high-tension coil 3 of loading low-voltage coil 2 and diode 4 etc.In the focus pack cabinet 19 that plastics are made, be placed with the resistor 9, variable-resistance rotary knob 15, brush 16, insulating compound 17 and the sealant 18 that are welding metal terminal 14a-14d.

On metal terminal 14a, 14b, the lead 26,27 that focus voltage, screen grid voltage are used is drawn in welding respectively, as focus pack 20, be pressed into and chimeric aforementioned body cabinet 13 and focus pack cabinet 19, and at insulating compounds 21 such as its kickback transformer body interior filling epoxy resins.On the exit portion of guide line 26,27,, prevent spilling of insulating compound 21 by the inotropic rubber tube 22 of re-heat.

From with the connecting portion 6 of terminal 14a, 14b ', 6 ", bury aforementioned guide line 26,27 underground with insulating compound 21 to the guide line exit portion.At the kickback transformer main body side of resistor 9, the soft insulating compound 17 of injection epoxy series etc. is also solidified.This soft insulating compound 17 is for when resistor 9 insulation processing, and the stress that produces when being used for being suppressed at insulating compound 21 hot curings of hard is applied directly on the resistor 9.

When producing this focus pack 20, for insulating compound 17 does not go out to variable resistance one effluent of resistor 9, and must use counter-force than brush 16 bigger defeat tight resistor 9 in, numerous and diverse operation that sealant 18 is solidified, for this reason, the process automation difficulty, operating efficiency is poor, and causes producing cost to improve.

The object of the invention provides and addresses the above problem, and realizes automation, improves the production work efficiency, with the low-cost production kickback transformer.

For reaching aforementioned purpose, the invention is characterized in that kickback transformer comprises: leave high-tension coil in inside, and to the main body cabinet of focus pack cabinet side opening; Conducting rubber is installed, it is passed from main body cabinet side direction focus pack cabinet side, and have the intermediate member of the inaccessible aforementioned body cabinet openings of sizes of energy and the cabinet of the focus pack of the resistor that is connected metal terminal in internal storage.With the guide line of aforementioned high-tension coil inject conducting rubber, with intermediate member be entrenched in the opening that makes it inaccessible main body cabinet in the main body cabinet, by means of injecting insulating compound in main body cabinet and the space that intermediate member forms at interval and it solidifies, aforementioned focus pack cabinet is entrenched in aforementioned intermediate member, the part of aforementioned metal terminal is injected conducting rubber and by conducting rubber high-tension coil is connected with resistor.

As previously mentioned, the present invention is because with the opening of the inaccessible main body cabinet of intermediate member, by means of injecting insulating compound and make its curing in the space that main body cabinet and intermediate member form at interval, so can hold the stress that retaining produces with aforementioned intermediate member when insulating compound hardens.

Like this, sealant that can be in the past, and can omit in the past for insulating compound is not gone out to the variable resistance effluent of resistor, must with than the reaction force of brush bigger defeat tight resistor, one side makes numerous and diverse operation of sealant cures, and can realize that automation, production efficiency well also can the cheap kickback transformers of producing.

Fig. 1 represents the cutaway view of the kickback transformer relevant with the embodiment of the invention.

Fig. 2 is illustrated in the figure of the terminal shape that uses in this kickback transformer.

Fig. 3 represents the key diagram of the connection status of its terminal and each link.

Fig. 4 represents the key diagram of the connection status of its terminal and each link.

Fig. 5 represents the structure chart of the connection status of guide line.

Fig. 6 represents the figure by means of the fixing means of the guide line of cabinet and intermediate member.

Fig. 7 represents the figure of the chimerism of intermediate member and focus pack.

The part enlarged drawing of Fig. 8 presentation graphs 7.

Fig. 9 represents the figure by means of the fixing means of the guide line of cabinet.

Figure 10 represents the figure by means of the fixing means of the guide line of cabinet and intermediate member.

Figure 11 represents the figure of the ceramic resistor of double focusing type fly.

Figure 12 represents the circuit diagram of the kickback transformer of double focusing type fly.

Figure 13 represents the circuit diagram of other example of the kickback transformer of double focusing type fly.

Figure 14 represents the figure of inside connection status of the focus pack of double focusing type fly.

Figure 15 represents the circuit diagram of kickback transformer.

Figure 16 represents the figure of ceramic resistor.

Figure 17 represents the cutaway view of kickback transformer in the past.

Below, with reference to accompanying drawing embodiments of the invention are described.

Embodiment

Below, according to Fig. 1-Figure 14 embodiments of the invention are described.

In these figure, attachedly on the part identical describe with identical numbering with Figure 15-Figure 17.Fig. 1 represents the cutaway view of kickback transformer, Fig. 2 represents the figure of terminal shape, Fig. 3 represents the figure of the method for attachment of terminal and link, Fig. 4 represents the figure of the connection status of terminal and resistor and guide line, conducting rubber, Fig. 5 represents the figure of the connection status of guide line, Fig. 6 represents the figure by means of cabinet and intermediate member fixed guide line, Fig. 7 represents the figure of the chimerism of intermediate member and focus pack, the part enlarged drawing of Fig. 8 presentation graphs 7, Fig. 9, Figure 10 represent the amplification view of the fixed structure of guide line.

As shown in Figure 1, in the main body cabinet 13 that plastics are made, deposit the high-tension coil 3 of loading low-voltage coil 2 and diode 4 etc.On the side of the focus pack cabinet 19 of this main body cabinet 13, peristome is set.

Focus pack machine that plastics are made deposit in 19 mutually variable resistance rotary knob 15, brush 16, connect the resistor 9 of metal terminal 25a-25d etc., on this focus pack cabinet 19 sides, peristome is set also.With methods such as heat-sealings resistor 9 is fixed on the focus pack cabinet 19, the heart yearn that focus voltage output is exported with guide line 27 with guide line 26 and screen grid voltage is connected to output with on terminal 25a, the 25d, guide line 26,27 is pressed in the ditch portion of focus pack cabinet 19, makes focus pack 20.Between aforementioned body cabinet 13 and focus pack cabinet 19, be embedded with a plastics intermediate member 24, just in time inaccessible the two the peristome of its size, on the position of this intermediate member 24, a plurality of through holes that run through to focus pack cabinet 19 sides from main body cabinet 13 sides are set, and in this through hole, insert the input and output terminal of logical focus pack 20 respectively and play conducting rubber 23a, 23b and the 23c that connects internal part and sealant effect, and make both ends keep exposing.

When injecting insulating compound 21 and solidifying, do not throw off the sidewall of focus pack cabinet 19 for making conducting rubber 23a, 23b and 23c, can spacing each conducting rubber 23a, 23b and 23c by intermediate member 24.

In addition, film capacitor 8 and high-tension resistive 36 parts such as (with reference to Figure 12) are connected on rubber 23a etc., and are loaded on the intermediate member 24 that plastics make.

Then, when the guide line 3a of high-tension coil 3 is injected conducting rubber 23b, be pressed into and chimeric aforementioned cabinet 13 and intermediate member 24, at this state, to be injected into by the insulating compound 21 that epoxy resin etc. is formed in the space that cabinet 13 and intermediate member form at interval, and make its curing.

Then, metal terminal 25a, 25b and 25c are being injected respectively among conducting rubber 23a, 23b and the 23c, and when guide line 26,27 being pressed in the ditch portion of the intermediate member 24 that plastics make, make aforementioned focus pack 20 chimeric with focus pack cabinet 19 and intermediate member 24.Like this, by conducting rubber 23b, high-tension coil 3 and resistor 9 are electrically connected.

Fig. 2 represents the figure of metal terminal 25 shapes, the front elevation of Fig. 2 (a) expression terminal 25, and Fig. 2 (b) represents plane graph, Fig. 2 (c) represents ground plan, Fig. 2 (d) expression left surface figure, and Fig. 2 (e) represents right hand view, Fig. 2 (f) represents back view, and Fig. 2 (g) represents expanded view.

As shown in these figures, terminal 25 has the protuberance 28 that inserts and be connected to the point of conducting rubber 23 (23a, 23b and 23c), holds under the arm and is connected guide line 26 and the joint-cutting portion 29 of 27 heart yearn and the spring portion 30 of "＜" word shape ground bending of holding resistor 9 under the arm and being connected with electrode part.

The figure of the connection status, terminal 25 that Fig. 3, Fig. 4 represent terminal 25 and resistor 9 and the connection status of conducting rubber 23 and terminal 25 and the connection status of guide line 26,27.In addition, the occasion in that metal terminal 25d is not connected with conducting rubber like that can delete protuberance 28 and use.The shape of joint-cutting portion 29 can be carved into " ten " font, also can be pressed into the guiding heart yearn at this.

As shown in Figure 5, guide line 26,27 is connected to metal terminal 25a, 25d, is bent into the approximate right angle shape, be pressed into and be fixed in the ditch portion that forms on the wall 32 of focus pack cabinet 19 with bending part 31a, 31b in the focus pack 20.Thus, from the stretching of the outside that is added to guide line 26,27 and the stress of distortion, can directly not be sent to and hold on the connecting portion of 25a, 25d.

As shown in Figure 6, on the wall of focus pack cabinet 19 and intermediate member 24, the raceway groove 33 of subtend is set respectively.As shown in Figure 7, chimeric by means of focus pack cabinet 19 and intermediate member 24, fixed guide line 26,27.

As Fig. 8, shown in Figure 9, on the inlet both sides of the ditch 33 that inserts guide line 26,27, rib 34 is set, on the inboard central portion of ditch 33 point 35 is set, by means of making rib 34 and point 35 be absorbed in the multiple layer of quilt of guide line 26,27, guide line 26,27 can not twist.In addition, as shown in figure 10, the shape of rib 34 (point 35) done acutangulating, guide line 26,27 can not break away from.

As Fig. 9, shown in Figure 10, the wall of focus pack cabinet 19 and intermediate member 24 is made multilayer more than 3 layers or 3 layers, can firmly fix guide line 26,27, because of the creepage distance that can guarantee fully to be used to insulate, so can improve reliability.As shown in figure 10, the rib 34 of acute angle also is set, and is absorbed in the multiple layer of quilt of guide line 26,27 in intermediate member 24 sides.

Though present embodiment is narrated the monofocal type, the structure of this terminal and fixed guide line can be applied in the kickback transformer of all circuit modes.As example application, in Figure 11, represented the ceramic resistor of double focusing type fly, in Figure 12,13, represented representative circuit figure, represented the inside connection layout of focus pack at Figure 14.Wherein, the part identical with Figure 15 and Figure 16 annotated with identical numbering, and explanation is omitted.

As previously mentioned, the present invention's opening of the inaccessible main body cabinet of intermediate member injects insulating compound and makes its curing by means of main body cabinet and intermediate member in the space that forms at interval, and aforementioned intermediate member can hold the stress that retaining produces when insulating compound solidifies.

So, the present invention no longer need use sealant in the past, thereby yet need not go out to variable resistor one effluent of resistor and must simultaneously use greater than brush is counteractive and defeat tight resistor in order to prevent insulating compound, one side makes numerous and diverse operation of sealant cures, and can realize automation, the production work efficiency is good, thereby can produce kickback transformer with cheap cost.

Claims (1)

1. kickback transformer, it comprises: leave high-tension coil in inside and at the main body cabinet towards a side opening of focus pack cabinet; Conducting rubber is installed, it is passed from main body cabinet side direction focus pack cabinet side, and have the intermediate member of inaccessible described main body cabinet openings of sizes; Focus pack cabinet with the resistor that is being connected metal terminal in internal storage, it is characterized in that, the guide line of described high-tension coil injects conducting rubber, be entrenched in intermediate member in the main body cabinet and the opening of inaccessible main body cabinet, by means of injecting insulating compound in main body cabinet and the space that intermediate member forms at interval and making it solidify, described focus pack cabinet is entrenched in described intermediate member, the part of described metal terminal is injected conducting rubber and by conducting rubber high-tension coil is connected with resistor.

Images