CN110580106A

CN110580106A - display control panel and assembling method

Info

Publication number: CN110580106A
Application number: CN201810595173.0A
Authority: CN
Inventors: 张强; 白云; 胡浪; 吴吉昌; 张璐; 杨勇; 徐军; 饶万勇
Original assignee: CRRC Zhuzhou Institute Co Ltd
Current assignee: CRRC Zhuzhou Institute Co Ltd
Priority date: 2018-06-11
Filing date: 2018-06-11
Publication date: 2019-12-17
Anticipated expiration: 2038-06-11
Also published as: CN110580106B

Abstract

The invention discloses a display control panel which comprises a front frame, a PCB (printed Circuit Board), a touch screen, a surface layer and an installation frame, wherein the front frame is provided with a groove, the height of the inner side wall of the groove is lower than that of the outer side wall, the touch screen is arranged on the inner side wall, the PCB and the installation frame are arranged in the groove, the PCB is positioned on the back surface of the installation frame, the surface layer is connected to the front surface of the installation frame and is flush with the outer side wall, the front surface of the touch screen is connected with the back surface of the surface layer, and a transparent window is. The invention further discloses an assembling method of the display control panel, which comprises the following steps: s1, respectively assembling the touch module, the key module and the mounting frame module; s2, assembling the touch module and the mounting frame module; s3, assembling the key module and the mounting frame module; and S4, assembling the key module and the front frame. The touch screen has the advantages of simple structure, good appearance quality, convenience in cleaning and maintaining the touch screen and the like.

Description

Display control panel and assembling method

Technical Field

The invention relates to train-mounted equipment and an assembling method, in particular to a display control panel and an assembling method.

background

the control panel of the network display screen of the train cab is used as one of main human-computer interfaces for drivers to drive and observe the running state of a train, and integrates multiple functions of key pressing, touch, display and the like. The control panel is mostly of a non-flat structure due to the size requirement of the display, namely, a certain height difference exists between the front face of the touch screen and the front frame, so that the appearance quality is poor, and the touch screen is not convenient to clean and maintain. The current train network display screen control panel mainly has two kinds of mounting means: one is to use metal or plastic front frame as support, and to stick the film key and touch screen on the front shell separately, wherein the film key is multilayer film structure, and uses flexible film printed circuit board as circuit base board, and integrates metal spring plate key and other electronic elements such as sensitization and indication in the middle. This scheme receives technology and cost restriction, and the film button is difficult to whole laminating formation plane entirely with the touch-sensitive screen to can't keep flushing with preceding frame, paste alone simultaneously and both influenced pleasing to the eye, be difficult to guarantee waterproof requirement again. The other is to replace the traditional flexible film printed circuit board with a hard circuit board, and the control panel comprises the hard circuit board, a metal dome, an EL backlight (short for Electro luminescence), a touch screen or glass, a polyester film surface layer, a back glue layer and the like. The scheme has limited requirements on the size, for example, when the size of a panel is 310mm multiplied by 214mm, due to the influence of the sizes of a front frame and a touch screen, if a pure flat structure is required to be ensured, the space left for keys and a backlight area is limited, devices cannot be arranged, and the requirements on appearance and water resistance are met. The conventional approach is to replace the touch screen with glass, but this loses the touch functionality of the control panel. In addition, the use of an EL cold light sheet (an electric field generated by an ac voltage applied to electrodes at both ends excites a fluorescent substance to emit light) as a backlight causes gradual decrease in luminance with the passage of time, and an ac circuit needs to be added to the circuit, which makes the structure complicated and increases the cost.

disclosure of Invention

the technical problem to be solved by the invention is to overcome the defects of the prior art and provide the display control panel which has a simple structure and good appearance quality and is convenient for cleaning and maintaining the touch screen.

The invention further provides an assembling method of the display control panel.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a display control panel, includes preceding frame, PCB board, touch-sensitive screen and superficial layer, still includes the installation frame, be equipped with the recess on the preceding frame, and the inside wall height of recess is less than the lateral wall, the touch-sensitive screen arrange in on the inside wall, the PCB board with the installation frame arrange in the recess and the PCB board be located the back of installation frame, the superficial layer connect in the front of installation frame and with the lateral wall flushes, the front of touch-sensitive screen with the back of superficial layer links to each other, on the superficial layer with the region that the touch-sensitive screen corresponds is equipped with transparent window.

as a further improvement of the above technical solution: the PCB board is provided with a touch switch, the back surface of the installation frame is provided with an installation groove for positioning the touch switch, the front surface of the installation frame is provided with a positioning through hole for the key part of the touch switch to pass through, the region of the back surface layer corresponding to the touch switch is provided with a key cap, and the region of the front surface layer corresponding to the key cap is provided with characters and is subjected to white transparent processing. The light-touch switch is used as a linear element for switching on and off the key, the light-touch switch is fully utilized to be suitable for high-density surface mounting, and the light-touch switch has the advantages of dust prevention, small error of operating force, high reliability, suitability for severe environment and the like; through mounting groove and positioning hole on the installation frame, be favorable to guaranteeing the reliable installation of dabbing the switch.

as a further improvement of the above technical solution: the LED backlight module is characterized in that the PCB is provided with LEDs, a reflector plate is arranged at the joint of the mounting groove and the positioning through hole, the LEDs and the reflector plate are arranged oppositely, the PCB, the mounting groove and the surface layer are matched to form a closed area, and the LEDs complete backlight light mixing through interface reflection and a light homogenizing medium and are transmitted out from a character area of the surface layer, so that key backlight is formed. The light emitting diode is used as the backlight source, an alternating current circuit is not required to be added, the problem of backlight source brightness attenuation in the prior art is avoided, and the service life is prolonged; the light-emitting diode, the reflector plate and the tact switch are positioned in a closed area, so that the work reliability is guaranteed.

as a further improvement of the above technical solution: the key cap is bonded with the surface layer, and the reflection sheet is bonded with the mounting frame.

As a further improvement of the above technical solution: PCB back is equipped with PCB board gum layer and through PCB board gum layer with preceding frame links to each other, the installation frame back be equipped with installation frame gum layer and through installation frame gum layer with PCB board links to each other, the touch-sensitive screen with link to each other through optical cement layer between the superficial layer, the superficial layer back be equipped with superficial layer gum layer and through superficial layer gum layer with the installation frame links to each other, installation frame four corners department through the fastener with preceding frame links to each other. The gum layer cooperation fastener can realize the installation frame, the PCB board is connected with the reliability of preceding frame, guarantees that the installation is firm.

as a further improvement of the above technical solution: be equipped with the constant head tank on the installation frame, the touch-sensitive screen edge is located the constant head tank top, touch-sensitive screen back edge is equipped with the touch-sensitive screen gum layer and through the touch-sensitive screen gum layer with the laminating of constant head tank. The touch-sensitive screen arranges on the one hand on the inside wall of recess, and on the other hand passes through the laminating of touch-sensitive screen gum layer and the constant head tank on the installation frame, has guaranteed good structural strength and surface smoothness, also means that the installation frame both is the support component of superficial layer, touch-sensitive screen and button, is the important component part of button function in a poor light again.

As a further improvement of the above technical solution: the PCB is a hard PCB; the surface layer is a polyester film layer.

The assembling method of the display control panel comprises the following steps:

s1, respectively assembling the touch module, the key module and the installation frame module: the front surface of the touch screen is attached to the transparent window on the back surface of the surface layer through optical cement, and the corresponding area on the back surface of the surface layer is coated with the adhesive; carrying out gum application on the back surface of the PCB; carrying out gum application on the back surface of the mounting frame;

S2, assembling the touch module and the mounting frame module: attaching the back surface of the surface layer to the front surface of the mounting frame;

S3, assembling the key module and the mounting frame module: attaching the back surface of the mounting frame to the front surface of the PCB;

S4, assembling the key module and the front frame: and pasting the PCB board into the groove of the front frame.

as a further improvement of the above technical solution: the assembling method of the display control panel comprises the following steps:

S1, respectively assembling the touch module, the key module and the installation frame module: the front surface of the touch screen is attached to the transparent window on the back surface of the surface layer through optical cement, a key cap is adhered to the back surface of the surface layer corresponding to the key character area, and the rest part of the back surface of the surface layer is subjected to gum application; assembling a PCB and carrying out gum application on the back surface of the PCB; carrying out gum application on the back surface of the mounting frame;

S1, respectively assembling the touch module, the key module and the installation frame module: the front surface of the touch screen is attached to the transparent window on the back surface of the surface layer through optical cement, a key cap is adhered to the back surface of the surface layer corresponding to the key character area, and the rest part of the back surface of the surface layer is subjected to gum application; assembling a PCB and carrying out gum application on the back surface of the PCB; assembling an installation frame and carrying out gum application on the back surface of the installation frame, wherein the quantity of the reflection sheets is configured according to the actual key backlight effect;

Compared with the prior art, the invention has the advantages that: the display control panel disclosed by the invention is characterized in that a groove is arranged on the front frame, the mounting frame and the PCB are arranged in the groove, the touch screen is arranged on the inner side wall of the groove, the surface layer is connected to the front surface of the mounting frame, and the surface layer on the front surface of the touch screen can be flush with the front frame, namely a pure flat structure, through the arrangement of the height difference among the bottom surface, the inner side wall and the outer side wall of the groove.

the assembling method disclosed by the invention has the advantages of simple steps and easiness in operation, and can realize the pure flat effect of the display control panel.

Drawings

FIG. 1 is an exploded view of a display control panel according to the present invention.

FIG. 2 is a schematic perspective view of a front frame of the present invention

Fig. 3 is an enlarged schematic view of the mounting frame of the present invention.

fig. 4 is a schematic top view of a mounting frame of the present invention.

Fig. 5 is an enlarged schematic view of the surface layer in the present invention.

FIG. 6 is a flow chart of a display control panel assembly method according to the present invention.

The reference numerals in the figures denote: 1. a front frame; 11. a groove; 12. an inner sidewall; 13. an outer sidewall; 14. a threaded hole; 2. a PCB board; 21. a tact switch; 22. a light emitting diode; 23. a PCB back glue layer; 3. a touch screen; 31. a touch screen back glue layer; 4. a surface layer; 41. a transparent window; 42. a key cap; 43. a surface layer and a back glue layer; 5. a mounting frame; 51. mounting grooves; 52. positioning the through hole; 53. a reflective sheet; 54. installing a frame back glue layer; 55. positioning a groove; 6. and the optical adhesive layer.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

Example one

Fig. 1 to 5 show an embodiment of a display control panel according to the present invention, which is composed of a front frame 1, a rigid PCB 2 and its back adhesive, a mounting frame 5 and its back adhesive, a touch screen 3, a key cap 42, a reflective sheet 53, and a surface layer 4. The PCB circuit substrate is provided with a plurality of surface-mounted light-touch switches 21 and a plurality of SMD-packaged light-emitting diodes 22, and the surface-mounted light-touch switches and the SMD-packaged light-emitting diodes form a key module together with a PCB back glue layer 23; the reflecting sheet 53 is stuck on the top surface of the mounting groove 51 on the back surface of the mounting frame 5, and forms a mounting frame module together with a mounting frame back glue layer 54; the touch screen 3 is attached to the surface layer 4 by OCA optical cement (special adhesive for cementing transparent optical elements, commercially available), and the key cap 42 is attached to the back surface of the surface layer 4, thereby forming a touch module.

The front frame 1 of the display control panel is provided with a groove 11 as a containing area for placing the touch screen 3 and the mounting frame 5, the containing area is 274mm × 210.8mm, the depth is 4.7mm, and the inner side wall 12 (the side close to the touch screen 3) of the groove 11 supports the touch screen 3. The touch screen 3 employs a custom touch screen 3, limited in size, 224.18mm by 168.75 mm. PCB board 2 and PCB board gum layer 23 thickness are 1mm, and whole paste is in the district that holds of preceding frame 1, has arranged on the PCB board 2 and has touched components and parts such as switch 21, emitting diode 22, LED pilot lamp, photosensitive device, connector. The middle layer is arranged on the front surface, namely the upper surface, of the PCB 2, the mounting frame 5 and the mounting frame back glue layer 54 are arranged in the middle layer, the overall thickness is about 3.4mm, the mounting frame 5 is provided with a plurality of mounting grooves 51 on the back surface, the front surface is provided with a plurality of positioning through holes 52, the key part of the tact switch 21 is connected with the key cap 42 through the positioning through holes 52, the depth of the mounting groove 51 is about 2mm, the reflecting sheet 53 is adhered at the joint of the mounting groove 51 and the positioning through holes 52, the lower part of the reflecting sheet 53 faces the light emitting diode 22, meanwhile, the front surface (the upper surface in fig. 1, correspondingly, the back surface is the lower surface) of the mounting frame 5 is provided with positioning grooves 55 for positioning and supporting the touch screen 3, for fixing the mounting frame 5 more reliably, threaded holes 14 are. The surface layer 4 is stuck on the upper surface or front surface of the mounting frame 5, and the thickness of the surface layer 4 is 0.3mm, so that the surface layer 4 is flush with the outer side wall 13 of the front frame 11 after being completely assembled, namely, a pure flat structure is realized. The front window area of surface layer 4 is transparent window 41, and the printing of the non-transparent window 41 region in front is dull polish printing ink, and surface layer 4 openly just is to button position silk screen printing character and is done white and pass through the processing, and the back is pasted and is had button cap 42, and button cap 42 material is PMMA, and thickness is 0.5 mm. The installation groove 51 of the installation frame 5, the PCB 2 and the surface layer 4 are matched to form a closed area, the light emitting diode 22 completes backlight light mixing through interface reflection and a light homogenizing medium, and the light is transmitted from the character position of the surface layer 4 to form key backlight. In order to ensure the positioning accuracy of the assembly process of the control panel, each layer is provided with an assembly positioning hole.

Example two

fig. 6 shows a flow chart of the assembling method of the display control panel of the invention, which comprises the following steps:

1. assembling the touch module: the front surface of the touch screen 3 is attached to the transparent window 41 area on the back surface of the surface layer 4 through OCA optical cement, the key cap 42 is attached to the back surface corresponding to the key silk-screen character position, the dotted line of the assembly position of the touch screen 3 and the key cap 42 is printed on the back surface of the surface layer 4, so that the installation and the positioning are convenient, and the whole gum is applied to the rest part of the back surface of the surface layer 4; assembling a key module: the hard PCB and the PCB back glue layer 23 are arranged in an assembly tool to complete assembly; assembling the installation frame module: the mounting frame back glue layer 54, the reflecting sheets 53 and the mounting frame 5 are arranged in an assembly tool to complete assembly, wherein the number of the reflecting sheets 53 is configured according to actual key backlight effect;

2. And the assembled touch module and the assembled mounting frame module are assembled in the step 2. In order to ensure good structural strength and surface flatness, the back of the touch screen 3 is coated with two-component black silica gel to be attached to the positioning groove 55 of the mounting frame 5;

3. Placing the key module and the assembly body assembled in the step 2 in an assembly tool to complete the step 3;

4. And (3) integrally sticking the key module, the touch module and the installation frame module which are assembled in the step (3) into the groove 11 of the front frame 1, and realizing reliable connection with the front frame 1 by locking with screws.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. The utility model provides a display control panel, includes preceding frame (1), PCB board (2), touch-sensitive screen (3) and superficial layer (4), its characterized in that: still include installation frame (5), be equipped with on preceding frame (1) recess (11) and inside wall (12) of recess (11) highly be less than lateral wall (13), touch-sensitive screen (3) arrange in on inside wall (12), PCB board (2) with installation frame (5) arrange in recess (11) and PCB board (2) are located the back of installation frame (5), superficial layer (4) connect in the front of installation frame (5) and with lateral wall (13) flush, the front of touch-sensitive screen (3) with the back of superficial layer (4) links to each other, on superficial layer (4) with the region that touch-sensitive screen (3) correspond is equipped with transparent window (41).

2. the display control panel of claim 1, wherein: be equipped with on PCB board (2) and dabble switch (21), installation frame (5) back is equipped with and is used for the location dabbing mounting groove (51) of switch (21) and openly be equipped with and be used for supplying dabbing positioning hole (52) that the button part of switch (21) passes through, the surperficial layer (4) back with the region that dabs switch (21) corresponds is equipped with key cap (42), and the region that superficial layer (4) openly corresponds with key cap (42) is equipped with the character and does the white processing of passing through.

3. The display control panel of claim 2, wherein: the LED backlight module is characterized in that the PCB (2) is provided with an LED (22), a reflector plate (53) is arranged at the joint of the mounting groove (51) and the positioning through hole (52), the LED (22) and the reflector plate (53) are oppositely arranged, the PCB (2), the mounting groove (51) and the surface layer (4) are matched to form a closed area, and the LED (22) completes backlight light mixing through interface reflection and light homogenizing media and transmits out from a character area of the surface layer (4).

4. the display control panel of claim 3, wherein: the key cap (42) is adhered to the surface layer (4), and the reflection sheet (53) is adhered to the mounting frame (5).

5. the display control panel according to any one of claims 1 to 4, characterized in that: PCB board (2) back be equipped with PCB board gum layer (23) and through PCB board gum layer (23) with preceding frame (1) links to each other, installation frame (5) back be equipped with installation frame gum layer (54) and through installation frame gum layer (54) with PCB board (2) link to each other, touch-sensitive screen (3) with link to each other through optical cement layer (6) between superficial layer (4), superficial layer (4) back be equipped with superficial layer gum layer (43) and through superficial layer gum layer (43) with installation frame (5) link to each other, installation frame (5) four corners department pass through the fastener with preceding frame (1) links to each other.

6. The display control panel according to any one of claims 1 to 4, characterized in that: be equipped with constant head tank (55) on installation frame (5), touch-sensitive screen (3) edge is located constant head tank (55) top, touch-sensitive screen (3) back edge be equipped with touch-sensitive screen gum layer (31) and through touch-sensitive screen gum layer (31) with constant head tank (55) laminating.

7. The display control panel according to any one of claims 1 to 4, characterized in that: the PCB (2) is a hard PCB; the surface layer (4) is a polyester film layer.

8. A method of assembling a display control panel according to any one of claims 1 to 7, wherein: the method comprises the following steps:

S1, respectively assembling the touch module, the key module and the installation frame module: the front surface of the touch screen (3) is attached to the transparent window (41) on the back surface of the surface layer (4) through optical cement, and the back surface of the corresponding area on the back surface of the surface layer (4) is coated with the adhesive; carrying out gum application on the back surface of the PCB (2); carrying out gum application on the back surface of the mounting frame (5);

s2, assembling the touch module and the mounting frame module: the back surface of the surface layer (4) is attached to the front surface of the mounting frame (5);

S3, assembling the key module and the mounting frame module: attaching the back surface of the mounting frame (5) to the front surface of the PCB (2);

s4, assembling the key module and the front frame (1): and pasting the PCB (2) into the groove (11) of the front frame (1).

9. the method of assembling a display control panel according to any one of claims 2 to 7, wherein: the method comprises the following steps:

S1, respectively assembling the touch module, the key module and the installation frame module: the front surface of the touch screen (3) is attached to a transparent window (41) on the back surface of the surface layer (4) through optical cement, a key cap (42) is attached to the back surface of the surface layer (4) corresponding to a key character area, and the rest part of the back surface of the surface layer (4) is back-glued; assembling the PCB (2) and carrying out gum application on the back surface of the PCB (2); carrying out gum application on the back surface of the mounting frame (5);

10. The method of assembling a display control panel according to any one of claims 3 to 7, wherein: the method comprises the following steps:

S1, respectively assembling the touch module, the key module and the installation frame module: the front surface of the touch screen (3) is attached to a transparent window (41) on the back surface of the surface layer (4) through optical cement, a key cap (42) is attached to the back surface of the surface layer (4) corresponding to a key character area, and the rest part of the back surface of the surface layer (4) is back-glued; assembling the PCB (2) and carrying out gum application on the back surface of the PCB (2); assembling a mounting frame (5) and carrying out gum application on the back surface of the mounting frame (5), wherein the quantity of the reflecting sheets (53) is configured according to the actual key backlight effect;