CN2519957Y

CN2519957Y - Ultrasonic wave touch screen seal structure for CRT display

Info

Publication number: CN2519957Y
Application number: CN 01260081
Authority: CN
Inventors: 李晓忠; 李飞; 王元成
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2001-09-24
Filing date: 2001-09-24
Publication date: 2002-11-06
Anticipated expiration: 2011-09-24

Abstract

The utility model relates to a seal structure of ultrasonic touch screen for a CRT display, comprising a CRT display screen (3), a front cover for the display (2) and a middle cover (1), one surface of the ultrasonic touch screen (5) is stuck on the CRT display screen (3) by a viscosity substance (4), the other surface of the ultrasonic touch screen (5) is arranged in the dustproof strip (6) of a strengthening rib for the middle cover and pushed down. Therefore, the utility model has the advantages that the sealing of the ultrasonic touch screen and the CRT display screen can be well solved, and the screen body can not be crushed, the error action of touching can not be produced, and the utility model has great manufacturability in engineering manufacture.

Description

The ultrasonic touch screen hermetically-sealed construction that is used for CRT monitor

Technical field

The utility model relates to graphoscope, particularly is used for the ultrasonic touch screen hermetically-sealed construction of CRT monitor.

Background technology

Computing machine has been widely used in every field, and is extensive use of in family.But because the use of computing machine need be imported by keyboard, the user must be familiar with ability appliance computers such as the working rule of input instruction, keyboard.At present, occur a kind of acoustic wave touching screen that covers on the market on the CRT display screen, by the display interface of computing machine, the user is the operational computations machine easily, and need not be by the keyboard operation computing machine.The ultimate principle of sound wave touch-type glass screen is the mechanical energy that adopts the glass surface shallow-layer to propagate, as shown in Figure 1, each has been fixed vertically and the ultrasound transmitting transducer 1.1 of level in the upper left corner of glass and the lower right corner, and the upper right corner has then been fixed two corresponding ultrasound waves and accepted transducer 1.2.Four peripheries of glass screen then are carved with miter angle by combing the very accurate reflection strip of close spacing.Transmitting transducer 1 is sent controller here by cable electric signal is converted into acoustic wave energy and transmits to the left surface, by reflection strip acoustic wave energy is passed to receptacle 1.2 again, and receptacle 1.2 becomes electric signal to the surface energy that will return.After one effectively touched formation, the surface energy of acceptance formed a decay breach, thereby perceived.Because this touch-screen also has the 3rd, pressure axis response just.Thereby the pressure between face frame and the touch-screen will keep a suitable scope.Since the technical characterstic of this touch-screen, therefore, present like product such as public place information inquiry equipment, its a kind of scheme that adopts is that front plane frame is arranged to movable brandreth, another is the inside, viewing area that reflection strip is exposed to front plane frame.Because dust influences the transmission of signal, so ultrasound touchscreen needs special messenger's cleaned at regular intervals.Above-mentioned two kinds of methods all can not realize the effective of reflection strip prevented dust, and are unfavorable for that the user uses.

The utility model content

The purpose of this utility model provides the hermetically-sealed construction of a kind of ultrasound touchscreen and CRT display screen,

Guarantee the excellent sealing of touch-screen and CRT display screen, need not user's cleaning.For achieving the above object, the ultrasonic touch screen hermetically-sealed construction that is used for CRT monitor comprises CRT display screen 3, display front plane frame 2 and face frame 1, the one side of ultrasound touchscreen 5 is bonded on the CRT display screen 3 by stickum 4, and another side is pushed down by the dust excluder 6 in the face frame reinforcement in being placed on.

The utility model has well solved the sealing of ultrasonic touch screen with the CRT display screen, and can guarantee the screen body of not crushing, and does not produce false touch and touches action, and in the engineering manufacturing good manufacturability is arranged.

Description of drawings

Fig. 1 is the ultrasound touchscreen principle schematic;

Fig. 2 is the front view that the graphoscope of ultrasound touchscreen is installed;

Fig. 3 is the sectional view that shows the hermetically-sealed construction of display shown in Figure 2;

Fig. 4 is the synoptic diagram of front plane frame and display locking position.

The embodiment of utility model

Describe the utility model in detail below in conjunction with accompanying drawing.

As shown in Figure 2, touch-screen 5 be attached to CRT monitor 3 above because the principle of work of touch-screen and its materials limitations must be attached to touch-screen 5 on the display 3 to keep certain rigidity.So, between CRT display screen 3 and touch-screen 5, need a kind of transition material, make that i.e. contact well can keep certain rigidity again between CRT demonstration 3 and the touch-screen 5.What the utility model was selected for use is double faced adhesive tape dust excluder 4.As shown in Figure 3, touch-screen 5 be attached to the double faced adhesive tape dust excluder 4 that adopted on the display 3 can not because of too thin produce interfere lathe work or because of the too thick CRT of making installation process complicated.The thickness of double faced adhesive tape dust excluder is the 1-3 millimeter, is the best with 2 millimeters.Width 10-14 millimeter reinforcement of projection on the middle face frame on the face frame, this width is because must be pressed on the touch-screen at the dust excluder 6 that pastes on the reinforcement, pressure is wanted balanced and is controlled at a suitable scope.The width of dust excluder 6 is the 10-14 millimeter, and 12 millimeters more appropriate.Paste special dust excluder 6 on reinforcement, the one side that dust excluder 6 is affixed to touch-screen is the PVC material of 0.2-0.8 millimeters thick, and this kind material has certain intensity, can not be pressed onto the reflection strip the inside and come, and influences touch screen functionality.The optimum thickness of PVC material is 0.5 millimeter.In order to make dust excluder that certain elasticity be arranged, when vibration takes place display, play the effect of buffering, the one side of face frame was the sponge of 0.8-2.2 millimeter during dust excluder 6 was affixed to, the optimum thickness of sponge is 1.5 millimeters.Dust excluder can not be too thick, and too thick influence is attractive in appearance, also can not be too thin, and too thin meeting makes the reinforcement on the face frame be pressed onto touch-screen influences touch screen functionality, and the thickness of dust excluder is the 1-3 millimeter, and optimum thickness is 2 millimeters.As shown in Figure 4, when the face frame is locked, must adjust the height and the torsion of locking post on CRT.In general, on the locking post, place a rubber sheet gasket, the gap in being used for adjusting between face frame and the touch-screen.But the rubber sheet gasket time has been grown can distortion, and assembling be difficult to adjust in gap between face frame and the touch-screen.So, on rubber sheet gasket, adding a metallic gasket, metallic gasket can be copper backing or iron gasket, like this, the stability in gap between face frame and the touch-screen in can keeping.

For guaranteeing that touch-screen 5 and CRT show 3 applying, mutually bonding with suitable double-sided tape between touch-screen 5 and display 3, be the sealing of guaranteeing that touch-screen and front plane frame can be good, pressure is not again big especially, and assurance pressure is even.Here adopted extraordinary dust excluder, the corresponding touch-screen reflection strip of panel place during dust excluder is attached to, then middle panel is connected with front plane frame with the trip mode, then with front plane frame and display locking, because the elastically deformable of plastics, should have rubber sheet gasket to be used to cushion in front between the locked position of frame and display also will have the stability of iron gasket control front plane frame and display relative position, must consider the torsional moment of its coupling mechanism force simultaneously.

Claims

1. a ultrasonic touch that is used for CRT monitor shields hermetically-sealed construction, comprise CRT display screen (3), display front plane frame (2) and middle face frame (1), the one side that it is characterized in that ultrasound touchscreen (5) is bonded on the CRT display screen (3) by stickum (4), and another side is pushed down by the dust excluder (6) in the face frame reinforcement in being placed on.

2. by the described hermetically-sealed construction of claim 1, it is characterized in that described adhesive substance (4) is a double-sided tape.

3. by the described hermetically-sealed construction of claim 1, it is characterized in that described dust excluder (6) is the different resilient material of two sides characteristic.

4. by the described hermetically-sealed construction of claim 3, the one side that it is characterized in that described described dust excluder (6) is the PVC material, and another side is a sponge.

5. by the described hermetically-sealed construction of claim 1, the thickness that it is characterized in that described dust excluder (6) is the 1-3 millimeter, and width is the 10-14 millimeter.

6. by the described hermetically-sealed construction of claim 5, the width that it is characterized in that described dust excluder (6) is 12 millimeters.

7. by the described hermetically-sealed construction of claim 4, the thickness that it is characterized in that described PVC material is the 0.2-0.8 millimeter, and the thickness of sponge is the 0.8-2.2 millimeter.

8. by the described hermetically-sealed construction of claim 1, it is characterized in that described dust excluder (6) pushes down the reflection strip place of touch-screen (5).

9. by the described hermetically-sealed construction of claim 1, it is characterized in that placing metallic gasket on the rubber sheet gasket between described front plane frame and the display locking position.

10. by the described hermetically-sealed construction of claim 9, it is characterized in that described metallic gasket is copper backing or iron gasket.