CN1259825A - Focusing box for beed back transformer - Google Patents
Focusing box for beed back transformer Download PDFInfo
- Publication number
- CN1259825A CN1259825A CN 99105865 CN99105865A CN1259825A CN 1259825 A CN1259825 A CN 1259825A CN 99105865 CN99105865 CN 99105865 CN 99105865 A CN99105865 A CN 99105865A CN 1259825 A CN1259825 A CN 1259825A
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- focusing
- screen grid
- box
- circuit board
- outlet terminal
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- Coils Or Transformers For Communication (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The invention discloses a focus pack of feed back transformer FBT. The focus pack disposed at one side of the feed back transformer has a circuit board inside. Printed resistances are form on the circuit board in linear mode, and sliding contacts respectively move along the linear resistance thereby to effectively adjust different output voltage. In this manner, during the focus pack is made, the circuit board can be safely protected in the focus pack. Thus, filling insulation resin is not necessary, and the volume of the focus pack can be reduced, so that focus and screen grid voltage can be easily adjusted.
Description
The present invention relates to the focusing box of feedback transformer (hereinafter referred to as " FBT "), wherein feedback transformer can produce high pressure and it is supplied to the cathode ray tube of television set (TV) and monitor.Especially, the present invention relates to the focusing box of FBT, wherein focus on side that box is installed in FBT and be used for holding wherein circuit board, and install in the both sides of circuit board respectively and focus on and screen (screen) outlet terminal spare, printed resistor (resistor pattern) is arranged on the circuit board with form of straight lines, also has sliding contact to slide along the straight line printed resistor respectively and makes it possible to provide effectively different output voltages.Like this, make when focusing on box, circuit board is protected safely in focusing on box, and has a upper casing to cooperate with the focusing box.Therefore, do not need to fill insulating resin, and because sliding contact moves along straight line rheostat assembly, reduced to focus on the volume of box, the focusing of result's output and screen grid voltage mode are easily regulated.
In existing FBT, produce high pressure by low, high-tension coil usually, and high pressure is supplied to cathode-ray tube through anode cable.Focus pack is installed in the side of FBT, is used for changing the output voltage of FBT.
Fig. 1 represents to be installed in the schematic perspective view of the existing focusing box of FBT side.As shown in the figure, in focusing on box 10, a pair of sliding contact 30 has been installed, and sliding contact 30 is connected with screen grid knob 20b with focus knob 20a respectively.The ceramic wafer 50 of arranging a pair of printed circuit 40 above is installed in the focusing box 10, and this mode makes sliding contact 30 be electrically connected with printed circuit 40 respectively.And focusing links to each other with the back that focuses on box 10 with the screen grid cable.In addition, focus on box 10 and scribble insulating resin.
As shown in Figure 2, in existing focusing box 10, form printed circuit on circuit board 50, and sliding contact 30 is connected with sliding type to printed circuit 40 with this respectively, each sliding contact 30 one of is fixed among focus knob 20a, the screen grid knob 20b.If knob can be regulated screen grid and focus voltage thereby sliding contact 30 pivots.Insulating resin is filled into and focuses in the box 10, and insulating resin is wanted cured.
Yet, in focusing on box 10, fill and the curing insulating resin for insulating circuit board, can worsen processing characteristics and production efficiency, and increase production cost.
And, fill and the curing insulating resin, can cause forming crackle on the circuit board 50, and, can produce product defects if the filling insulating resin is excessive.
The invention is intended to overcome the above-mentioned shortcoming of prior art.
Like this, an object of the present invention is to provide the focus pack of a kind of recurrence transformer (FBT), wherein when production is installed in the focusing box of feedback transformer side, have the circuit board of a pair of printed resistor to protect safely in focusing on box on it.And a upper casing cooperates with the focusing box, thereby also can guarantee to focus on the insulating properties of box under the situation of not filling insulating resin in focusing on box, has improved assembly performance, processing characteristics and productivity ratio like this.
Another purpose of the present invention provides the focusing box of a kind of feedback transformer (FBT), wherein printed resistor forms with linear fashion, so that make sliding contact to move, reduced to focus on the volume of box like this, and can regulate screen grid voltage and focus voltage in mode easily along continuous straight line.
For achieving the above object, the focusing box according to feedback transformer of the present invention comprises: one focuses on box main body, has the side that a circuit board placement notch and this main body will be installed in FBT; A circuit board is installed on the aforementioned body, and forms focusing parallel to each other and screen grid printed resistor thereon; Focusing and screen grid outlet terminal spare are parallel to circuit board and install in the circuit board both sides, are used for regulating focusing on and screen grid voltage; A pair of sliding contact parallel to each otherly contacts, thereby regulates output voltage along linear slide and with focusing and screen grid printed resistor and focusing, screen grid outlet terminal spare; And a upper casing, cooperate with the focusing box main body, with protective circuit plate and sliding contact.
And be characterised in that according to the focusing box of feedback transformer of the present invention (FBT): a pair of outlet terminal holddown groove degree of lip-rounding is formed in the both sides in circuit board standing groove epistome; The fixture of focusing and screen grid outlet terminal spare is with focusing and screen grid outlet terminal spare integral forming; Focusing and screen grid outlet terminal spare have form of straight lines, and fixture formation is to be bent downwardly by the anterior top from focusing and screen grid outlet terminal spare to form; A pair of cable connectors is to be bent upwards by the other end from focusing and screen grid outlet terminal spare to form; Also have a pair of terminal member to make sliding contact link to each other with screen grid outlet terminal spare with screen grid printed resistor and focusing with focusing.
Usually with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail, above-mentioned purpose of the present invention and other advantage can be very clear.
These accompanying drawings comprise:
Fig. 1 is the schematic isometric that expression is installed in the existing focusing box of feedback transformer (FBT) side;
Fig. 2 is the existing elevational cross-sectional view that focuses on box;
Fig. 3 is the dissection stereogram according to focusing box of the present invention;
Fig. 4 is a sectional view, is illustrated in according to the focusing of installing in the focusing box of the present invention, screen grid sliding contact.
Fig. 3 is the exploded perspective view according to focusing box of the present invention.Fig. 4 is that sectional view is illustrated in according to focusing of installing in the focusing box of the present invention and screen grid sliding contact.
Focus on box main body 130 and have a circuit board placement notch 120, be used for containment circuit board 110 therein.Being formed with the circuit board 110 that focuses on printed resistor 140 and screen grid printed resistor 140 ' on it is placed in the circuit board placement notch 120.Two pin holes 150 and 150 ' are arranged at the both ends of circuit board 110, and earth terminal latch 160, input latch 170 are inserted into respectively in the pin hole 150,150 ' as a result.
Front in that the circuit board that focuses on box main body 130 is placed notch 120 forms a dark and elongated guide groove 180, is used for guiding grounding terminals spare 160.
Place the both sides of notch 120 at circuit board, arranging focusing and screen grid outlet terminal spare 200,200 ', above-mentioned each terminal member has the reclinate fixture 190 from its preceding top, and above-mentioned each terminal member 210 has cable connectors 210 in its back-end.
Focusing, screen grid outlet terminal spare 200,200 ' have fixing hole 220 respectively and are complementary with fixed lobe 230.Focus on, the fixture 190 of screen grid outlet terminal spare 200,200 ' front top and outlet terminal fixedly notch 240 be complementary.
Focusing, screen grid voltage-regulation sliding contact 260,260 ' by a pair of terminal member 250, contact with focusing, the screen grid printed resistor 140,140 ' of circuit board 110, also contact with focusing, screen grid outlet terminal spare 200,200 '.Each sliding contact 260,260 ' has the tooth bar 270 with 290 engagements of each pinion, and wherein each pinion 290 axially is connected with knob 280 respectively.Upper casing 300 is engaged on the focusing, screen grid voltage-regulation sliding contact 260,260 ', is used for protecting circuit board 110 and the sliding contact 260,260 ' that focuses in the box main body 130.
Two cable connectors 210, respectively by focus on, screen grid outlet terminal spare 200,200 ' rear end be bent upwards and form, and be inserted into the rear portion of upper casing 300.The rear portion of upper casing 300 has a pair of protection part 310, and extends circular guiding piece 320 to hold cable C from the rearward end of upper casing 300.
The work and the effect of the focusing box of the present invention of above-mentioned structure are described now.
Shown in Fig. 3 and 4, be protective circuit plate 110 safely, circuit board 110 is inserted into rectangular circuit board and places in the notch 120.
Be inserted into the circuit board 110 in the circuit board layout notch 120 that focuses on box main body 130, have focusing parallel to each other, screen grid printed resistor 140, so that can regulate focusing, screen grid voltage.Be complementary with grounding terminals spare 160 (extend to and focus on outside the box main body 130) and input terminal latch 170 (be arranged in the high-tension coil of FBT near) respectively near the latch patchhole that forms circuit board 110 two ends 150,150 '.In the front portion of circuit board layout notch 120, form a dark guide groove 180 and be used for when ground pin 160 falls back on the outside, guiding grounding terminals latch 160.
In the both sides of the circuit board layout notch 120 of placing circuit board 110, focus on by making the fixture 190 of outlet terminal spare 200,200 ' front end be complementary with fixing notch 240 respectively, installing, screen grid outlet terminal spare 200,200 '.Simultaneously, the fixing hole 220 of outlet terminal spare 200,200 ' rear end is complementary with the fixed lobe 230 that focuses on box main body 130, thereby will focus on, both sides that screen grid outlet terminal spare 200,200 ' tightly is fixed on circuit board layout notch 120.
With this understanding, focus on, screen grid voltage-regulation sliding contact 260,260 ' and focusing, the screen grid printed resistor 140,140 ' of circuit board 110 electrically contact, and also electrically contact with focusing, screen grid outlet terminal spare 200,200 ', these are realized by a pair of terminal member 250.Sliding contact 260,260 ' tooth bar 270 respectively with pinion 290 engagements, wherein pinion 290 axially is connected with knob 280 respectively.
When knobs 280 that pinion 290 axially is connected rotate, sliding contact 260,260 ' and move forward and backward with the tooth bar 270 of pinion 290 engagements, thus change focusing output voltage and screen grid voltage.
Simultaneously, on the adjusting sliding contact 260,260 ' of focus voltage and screen grid voltage, upper casing 300 is fixed on by ultrasonic bonding and focuses on the box main body 130, and circuit board 110 and sliding contact 260,260 ' are protected by upper casing 300 like this.At the rear portion of upper casing 300, outstanding a pair of connector protection part 310 is used for holding the cable connectors 210 of focusing, screen grid outlet terminal spare 200,200 ' rear end.From the back of upper casing 300, extending a pair of round cable guiding piece 320 that holds cable, thereby can regulate output voltage effectively.
According to above-mentioned the present invention, the focusing box that is installed in feedback transformer (FBT) side is containment circuit board therein, and focus on, both sides that the screen grid terminal member is installed in circuit board respectively, printed resistor is formed on the circuit board with form of straight lines, thereby and sliding contact shape printed resistor along the line respectively move and can regulate different output voltages effectively.Like this, when producing the focusing box, circuit board is protected safely in focusing on box and upper casing cooperates with the focusing box.Therefore, do not need to fill insulating resin, and focus on owing to sliding contact moves to make along linear printed resistor that box body is long-pending to be reduced, mode is regulated the focus voltage and the screen grid voltage of output so easily.
Based on specific accompanying drawing the present invention has been described in the above., obviously, on the prerequisite of the spirit and scope of the present invention that do not break away from appended claims of the present invention and limited,, can carry out various changes and modification to those skilled in the art.
Claims (11)
1. the focusing box of a feedback transformer (FBT) comprising:
One focuses on box main body, has the side that a circuit board placement notch and this main body are installed in described feedback transformer (FBT);
A circuit board is installed in described circuit board and places in the notch, and has the position focusing that is parallel to each other, screen grid printed resistor thereon;
Focusing, screen grid outlet terminal spare are parallel to described circuit board and are positioned at described circuit board both sides and install, and are used for regulating focusing, screen grid voltage;
A pair of sliding contact, parallel to each other along linear slide, and contact with described focusing, screen grid printed resistor, also contact, thereby regulate output voltage with described focusing, screen grid outlet terminal spare;
A upper casing cooperates with described focusing box main body, is used for protecting described circuit board and described sliding contact.
2. focusing box as claimed in claim 1 is characterized in that, forms fixedly notch of a pair of outlet terminal in the both sides in described circuit board standing groove epistome, is used to hold the fixture of described focusing, screen grid outlet terminal spare.
3. focusing box as claimed in claim 1 is characterized in that, described circuit board has a pair of latch patchhole, is used for holding respectively input, grounding terminals latch.
4. focusing box as claimed in claim 1 is characterized in that, the fixture of described focusing, screen grid outlet terminal spare and described focusing, screen grid outlet terminal spare integral forming; Described focusing, screen grid outlet terminal spare have form of straight lines; Described fixture is bent downwardly by the preceding top from described focusing, screen grid outlet terminal spare and forms; And a pair of cable connectors is to be bent upwards by the other end from described focusing, screen grid outlet terminal spare to form.
5. focusing box as claimed in claim 1 is characterized in that, a pair of terminal member (250) is set so that described focusing, screen grid voltage-regulation sliding contact are electrically connected with described focusing, screen grid printed resistor and described focusing, screen grid outlet terminal spare.
6. as each described focusing box in claim 1 and 5, it is characterized in that described focusing, screen grid voltage-regulation sliding contact have tooth bar respectively, described tooth bar respectively with pinion, described pinion respectively with rotation axis to being connected, and described terminal member cooperates with the bottom of described tooth bar respectively.
7. focusing box as claimed in claim 1 is characterized in that, the described circuit board standing groove epistome at described focusing box main body forms a deep trouth, is used for guiding described grounding terminals latch.
8. focusing box as claimed in claim 1 is characterized in that, described focusing, screen grid outlet terminal spare have the fixing hole that is complementary with fixed lobe respectively, described convexing to form in the both sides at described circuit board layout notch rear portion.
9. focusing box as claimed in claim 1, it is characterized in that, described terminal member (250) links to each other with described focusing, screen grid voltage-regulation sliding contact, and described terminal member is electrically connected with described focusing, screen grid printed resistor and described focusing, screen grid outlet terminal spare (200 and 200 '), and described terminal (250) moves with described sliding contact.
10. focusing box as claimed in claim 1 is characterized in that, described upper casing has a pair of connector protection part, is used to hold the cable connectors of the rear end of described focusing, screen grid outlet terminal spare.
11. focusing box as claimed in claim 10 is characterized in that, at the described connector protection rear portion partly of described upper casing, is extending the cable guide of a pair of circle.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR19980047597 | 1998-11-06 | ||
| KR47597/1998 | 1998-11-06 | ||
| KR19990076098 | 1999-03-09 | ||
| KR7698/1999 | 1999-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1259825A true CN1259825A (en) | 2000-07-12 |
Family
ID=26634300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99105865 Pending CN1259825A (en) | 1998-11-06 | 1999-04-23 | Focusing box for beed back transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1259825A (en) |
-
1999
- 1999-04-23 CN CN 99105865 patent/CN1259825A/en active Pending
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |