CN1333425C - Support for colour cathode ray tube frame/mask assembly - Google Patents

Abstract

The invention concerns a colour cathode ray tube comprising a frame/mask assembly arranged inside the tube, said frame/mask assembly being maintained in position in the tube through support means including a first arm (48) soldered at one first end (53) to the frame, and a second spring-forming arm (46), whereof one first end includes an aperture (55) designed to co-operate with a pin integral with the cathode ray tube glass casing and whereof the second end (51) is soldered to the second end (54) of the first arm, the two arms extending such that their first ends (50, 53) are arranged substantially opposite each other, said support elements further including a tongue (60) integral with the frame and extending towards the end of the second arm so as to be able to traverse said end through an aperture (61) arranged in said end.

Description

The strutting piece of color cathode ray tube frame/mask assembly

Technical field

The present invention relates to color cathode ray tube, it comprises the color selection shadow mask (mask) that is maintained at the appropriate position by rigid frame, the invention particularly relates to be used for frame/mask assembly is suspended at the inner device of pipe.

The present invention can be applied to comprise that color selects the cathode ray tube of any kind of shadow mask, and can be adapted to well equally form the pipe of its shadow mask and its shadow mask is stretched in pipe on the edge of rigid frame by compacting, wherein said pipe is fixed on the described rigid frame.

Background technology

Conventional color cathode ray tube comprises the glass case of finding time.In case, cathode ray tube comprises: color is selected shadow mask, and described color is selected the spaced apart accurate distance of face glass of shadow mask and cathode ray tube; And deposit the array of red, green and blue look phosphor so that form the panel of screen.Be positioned at cathode ray tube interior and produce three-beam electron-beam along the direction of panel at the electron gun at its rear portion.The electro-magnetic deflection unit that is usually located at the outside and close electron gun of cathode ray tube has the function that makes the electron beam deflecting, so that make them scan the surface that it is provided with the panel of phosphor array.Respectively with the influence of the corresponding three-beam electron-beam of certain primary color under, the phosphor array makes it possible to reproduce coloured image on screen, sprouts cover and makes the light beam of every Shu Teding only shine the phosphor of respective color.At the cathode ray tube duration of work, color selects shadow mask must be placed and be maintained at accurate position in the pipe.Utilize rectangular metal frame to realize keeping the function of shadow mask, described rectangular metal frame is very firm usually, and shadow mask is thereon soldered usually.

Use suspending apparatus frame/mask assembly to be installed on the panel of described pipe, described suspending apparatus be soldered to framework and with the bump bonds of inserting in the glass, wherein said glass is used to form the panel of described pipe.

Color selects shadow mask to be made by extremely thin metal forming, and has the surface that is called as active surface, and described surface is installed with the hole, and described hole is formed by chemical etching, and is arranged in vertical stringer usually; Active surface is not had the peripheral boundary in hole to surround.Usually make shadow mask be fixed to framework by spot welding at the peripheral boundary place.

For most of color cathode ray tubes, use be fixed to framework and with inserting surface glass sheet wall in the resilient supporting unit of bump bonds, frame/mask assembly is suspended in the panel of described pipe.

Bracing or strutting arrangement must have enough elasticity, to allow in each stage of making phosphor array frame/mask assembly and panel being split several times.

Bracing or strutting arrangement is arranged on the centre of frame facet usually or is arranged on the corner of described framework.In all situations, suppose to make frame/mask assembly insert panel and remove the number of times of operation of frame/mask from panel a lot of that described assembly may be with respect to some deflection slightly of described screen with respect to the final position of the final position of phosphor screen and shadow mask.Such deflection also may produce by the mechanical shock that acts on the described pipe after making described pipe.In all situations, this deflection makes the image variable color, because the distance between shadow mask and the screen is inappropriate.

Summary of the invention

The invention provides a kind of supporting construction that is used for frame/mask assembly, described supporting construction is very insensitive for shock and vibration, and can guarantee the required separation distance between shadow mask and the phosphor screen preferably.

For this reason, cathode ray tube according to the present invention comprises:

-color is selected shadow mask,

-be used for shadow mask is remained on the framework of the appropriate position of described pipe,

-with the support component of frame supported in described pipe,

At least one support component is included in the first arm that the first end place is soldered to framework, and second arm that forms spring, first end of described second arm has first opening, described first opening is used for the one bump bonds with the glass case of cathode ray tube, second end of described second arm is soldered to second end of the first arm, two arms extend makes their first end roughly face with each other

Described support component is characterised in that, they also comprise the tongue that is fixed to framework and extends along the first end direction of second arm, so that can pass through this end via second opening that is formed in the described first end, the Breadth Maximum of described second opening (62) extends along roughly vertical with the diagonal of framework direction.

Description of drawings

By following description and accompanying drawing, can understand the present invention better, wherein:

Fig. 1 is the sectional side view of cathode ray tube according to the invention;

Fig. 2 is the frame/mask assembly of described pipe of Fig. 1 and the partial top view of panel;

Fig. 3 is the cutaway view by the turning of panel, shows the strutting piece that is used for frame/mask assembly according to prior art;

Fig. 4 is the detailed view of the bracing or strutting arrangement of Fig. 3;

Fig. 5 A, 5B and 5C show the first embodiment of the present invention;

Fig. 6 illustrates the cutaway view of the second embodiment of the present invention;

Fig. 7 shows optional embodiment of the present invention.

Embodiment

Fig. 1 has described color cathode ray tube 8, and it comprises the glass case 10 that is made of panel 12, and open rear portion 16, and described rear portion is funnel shaped and ends at cylindrical neck portion 14.Panel comprises the part 18 of general flat, and described flat part 18 is as the display screen that is surrounded by peripheral skirt 10, and its end edge is sealed to rear portion 16.Panel 12 comprises the axis of two quadratures, and roughly in the horizontal direction main shaft X-X and with its minimum dimension parallel and roughly at the inferior axis Y-Y of vertical direction parallel with its full-size.These two axis normal are in the longitudinal axis Z-Z of described pipe, and described longitudinal axis is through the center of cylindrical neck portion 14 and the center of panel 12.Be provided with the mosaic block of three Essential colour phosphors, promptly the screen 22 of the mosaic block of red, green and blue look phosphor is deposited on the inner surface 18 of panel.Color selection electrode 24 is also referred to as shadow mask, has the active surface relative with panel, and described surface is passed in a plurality of holes; According to the present invention, this electrode is maintained at position suitable in the described pipe, and at the accurate distance place of distance screen 22, allows to allow in the various steps of making described pipe shadow mask to be placed and to be removed.Electron gun 26 is placed in the neck of described pipe, is focused at three-beam electron-beam on the screen 22 so that produce hole by shadow mask 24.

The described pipe of Fig. 1 is designed to: with external device (ED) 28 operations of the electron beam deflecting that is used to make rifle, close tube neck of this device and glass case open tie point between the part 16.Arrangement for deflecting 28 produces and makes from the electron beam level of electron gun and the magnetic field of vertical deflection, so that the whole surface of scanning screen 22.

In the periphery of shadow mask, shadow mask is fixed to rigid frame 32, so that form the frame/mask assembly shown in Fig. 1,2 and 3.Described framework 32 has and is roughly L shaped cross section, and has towards longitudinal axis Z-Z, first flange 36 that extends along screen orientation and roughly along second flange 38 of the direction extension that is parallel to screen.Being topped in the turning 42 of framework, has the cornerwise surface of the framework of being approximately perpendicular to.

Shadow mask 24 comprises the live part 25 with a lot of holes, and it is not had bore portion 27 and skirt section 29 is defined, and is extended with relative screen 22 by bending with respect to no bore portion 27; Then, by skirt section 29 is soldered to flange 36, and shadow mask is fixed to framework.Optionally, by being soldered to two parallel edges of flange 36, shadow mask can be tensioned and be held under tension force.

The supported device 34 of frame/mask assembly remains on the inside of described pipe, and described bracing or strutting arrangement 34 is fixed to described framework and engages with projection 44 in the skirt section 20 of inserting panel.These bracing or strutting arrangements can be placed near the middle part of frame facet, perhaps as shown in Figure 2, can be placed on the corner of framework.

Bracing or strutting arrangement 34 comprises the arm of being made by two long and thin metal plates 46 and 48, as Fig. 3 and shown in Figure 4.Plate 48 locates to be soldered to flange 36 in one of its end 53, and is soldered to one of end 51 of arm 46 at opposed end 54 places.This arm 46 forms spring and has second end 50, and described second end 50 is almost faced the end 53 of arm 48; End 50 comprises opening 55, so that 44 engages with projection, is roughly Frusto-conical described projection and passes through opening 55, so that suspend and keep frame/mask assembly.The end 50 of spring arm 46 and 51 mid portions 52 that bent by the plane with respect to these ends are connected, so that produce release areas, in release areas, utilize spring effect, described end can be discharged from projection 44 by pushing described end.

Two arms 46 and 48 are made by identical materials usually, and their thickness differs from one another.The spring force that needs in arm 46 places means, the thickness of arm 46 is usually less than the thickness of arm 48.

Notice that when described pipe experienced a shock, frame/mask assembly was subjected to the effect of power, described power can be regarded as two component sums: a component and the component along orthogonal direction along the axis direction of projection 44.Back one-component makes spring arm center on frusto-conical protrusion 44 and moves, the edge of opening 55 stayed surface on the described projection that rubs.Notice the surface of this friction damage frusto-conical protrusion, and the edge of opening 55 can not be free to slide through described surface again; The result of these surface irregularities is, during impacting rotatablely moving of being produced, spring arm may no longer return its initial position, and is locked in respect to screen in the relatively poor position of the surface alignment of shadow mask, produce skew when as a result, on described tube panel curtain, carrying out the color alignment.

The object of the invention is to avoid spring arm to center on projection 44 to produce and to rotatablely move.In first embodiment shown in Fig. 5 A, 5B and the 5C, bracing or strutting arrangement 34 also comprises metal tongue 60, described metal tongue 60 is fixed to framework and extends along the direction of the end 50 of spring arm 46, and described tongue 60 passes by the slit 61 that is formed in the end 50.In the embodiment of Fig. 5 A to 5C, the tongue 60 that is soldered to framework forms single with arm 48: the metallic plate identical with the metallic plate that forms arm 48 cut and bend, so that edge and the roughly direction extension of quadrature of the part 53 that is soldered to the framework surface obtain tongue 60 by described metallic plate thus.

Be positioned at bracing or strutting arrangement under the situation at frame corner place, slit 61 preferably is set to extend in the following manner: its maximum length 62 is along roughly extending with the perpendicular direction of framework diagonal.In the scope of mechanical clearance, the length 62 of slit is identical with the size of tongue 60 on identical direction, so that stop moving that not expect appear in the end of spring arm 46, and prevents that this end from rotating around frusto-conical protrusion 44.For the panel from pipe removes frame/mask assembly, what only need do is: towards arm 48 end of pusher arm 46 backward, tongue 60 slips into slit 61 then.

Slit 61 can have different shapes, can prevent from can adopt around the Any shape of projection 44 rotations, so that realize identical purpose.Fig. 6 illustrates the second embodiment of the present invention, and wherein, tongue 60 ' is separated with support arm, and directly is soldered to framework.The advantage of this structure is, it can corresponding all produced tubings, use same support arm system 46,48 and do not use locking device, and just those tubings to the shock-sensitive of generation alignment loss (registerloss) just need add the locking device of additional tongue 60 ' form.

Fig. 7 shows the third embodiment of the present invention, and wherein, the opening in the end of arm 46 adopts the form of recess 61 ', and its maximum length 62 is corresponding with tongue 60 or 60 ' length in the same direction in the scope of mechanical clearance.

The present invention is not limited to the device that is used for support frame/mask assembly that is arranged on the frame corner place, and similarly, the present invention can be as the bracing or strutting arrangement that is arranged on frame facet and middle part, roughly close described side.

The present invention also can be applied to comprise the bracing or strutting arrangement that is positioned at corner and be positioned at the pipe of the bracing or strutting arrangement on the frame facet that for example in very large pipe, the structure impact of these pipes is very responsive, because the weight of frame/mask assembly is quite big.

Similarly, the present invention can be applied to the integral part that framework is a shadow mask, and by the peripheral pipe that produces described framework of bending shadow mask.

Claims (6)

1. cathode ray tube comprises:

-color is selected shadow mask (24),

-be used for shadow mask is remained on the framework (32) of the appropriate location of described pipe,

-with the support component (34) of frame supported in described pipe, described support component (34) is arranged in the turning of framework,

At least one support component (34) is included in the first arm (48) that first end (53) locates to be soldered to framework, and second arm (46) that forms spring, first end (50) of described second arm has first opening (55), described first opening is used for engaging with the one projection (44) of the glass case of cathode ray tube, second end (51) of described second arm is soldered to second end (54) of the first arm, two arms extend makes their first end (50,53) roughly face with each other

Described support component is characterised in that they also comprise the tongue (60,60 ') that is fixed to framework and extends towards the first end direction of second arm, so that can pass through this end via second opening (61,61 ') that is formed in the described first end;

The Breadth Maximum of described second opening (62) extends along roughly vertical with the diagonal of framework direction.

2. according to the described cathode ray tube of aforementioned claim, it is characterized in that described tongue and the first arm form single.

3. cathode ray tube according to claim 1 is characterized in that described tongue is soldered to the flange of described framework.

4. cathode ray tube according to claim 1 is characterized in that, second opening that is formed in the first end of second arm is recess (61 ').

5. cathode ray tube according to claim 1 is characterized in that the thickness of described tongue is greater than the thickness of second arm.

6. cathode ray tube according to claim 1 is characterized in that, second opening that is formed in the first end of second arm is slit (61).

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