CN201985936U

CN201985936U - Mobile terminal

Info

Publication number: CN201985936U
Application number: CN2011200078826U
Authority: CN
Inventors: 戴义贵
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-01-12
Filing date: 2011-01-12
Publication date: 2011-09-21
Anticipated expiration: 2021-01-12

Abstract

The utility model discloses a mobile terminal. The mobile terminal includes a touch screen, a front shell assembly, an FPC assembly, a printed circuit main board PCB, and a liquid crystal display LCD. The mobile terminal also includes: being fixed on the PCB to support the FPC The support frame component of the component, the touch key located in the non-display area of the LCD; wherein, the FPC component is electrically connected to the PCB, and the light of the side-emitting LED of the FPC component is mapped to the light guide film LGF of the front shell component, which is determined by the The LGF delivers the light source to the position of the touch key in the non-display area of the LCD. The utility model solves the backlight problem of the touch key, increases the design space of the shape of the mobile terminal, facilitates the reduction of the size of the mobile terminal, and improves the usability of the mobile terminal.

Description

Mobile terminal

Technical Field

The utility model relates to a mobile terminal.

Background

With the continuous development of society, mobile terminals become an indispensable part of people's life and work, but due to the progress of mobile communication technology and the popularization of mobile terminals, people have made higher requirements on mobile terminals, for example, the requirements of more dazzling modeling design, stronger functions and the like. Touch mobile terminals, especially touch mobile terminals having large-sized Liquid Crystal Displays (LCDs), are increasingly popular with consumers, and have an increasing proportion in the mobile terminal market.

However, the key layout of the current touch mobile terminal mainly adopts the following structure:

1) the touch mobile terminal is not provided with a touch key, and only the bottom outside the LCD is provided with a traditional mechanical key;

2) the touch type mobile terminal is provided with a touch key, is positioned at the top or the bottom of a non-display area of the LCD, but has no backlight, is only printed on the touch screen in a silk screen way and is used as a shortcut key;

3) the touch type mobile terminal is provided with a touch key, but the position of the touch key is far away from the display area of the LCD, and meanwhile, the touch key avoids the non-display area of the LCD.

The existing key layout structure has the following problems:

1) the touch mobile terminal is only provided with a traditional mechanical key structure, the mechanical key needs to avoid a non-display area of an LCD, and the distance between the key and the LCD display area is relatively long, so that the whole size of the mobile terminal is large, and the shape of the mobile terminal is limited;

2) when the touch key of the touch mobile terminal is only silk-screened on the touch screen of the LCD non-display area, no optical fiber can penetrate out of the touch key due to no backlight, and when a user uses the mobile phone at night, the touch key is dark and the usability is poor;

3) when the touch key of the touch mobile terminal is arranged far away from the display area of the LCD, the whole size of the mobile terminal is larger because the non-display area of the LCD needs to be avoided at the same time.

SUMMERY OF THE UTILITY MODEL

In view of this, the main objective of the present invention is to provide a mobile terminal, which can realize the backlight of the touch key of the mobile terminal, and will not affect the overall size of the mobile terminal.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a mobile terminal comprises a touch screen, a Printed Circuit Board (PCB) and a Liquid Crystal Display (LCD), and further comprises: the display device comprises a flexible circuit board FPC assembly, a support frame assembly fixed on a PCB and supporting the FPC assembly, a front shell assembly fixed with a light guide film LGF and a touch key positioned in a non-display area of the LCD; wherein,

the FPC assembly is electrically connected with the PCB, and light rays of the side-emitting LEDs of the FPC assembly are mapped to an LGF of the front case assembly, and the LGF transmits a light source to a position of a touch key of the LCD non-display area.

Further, the area of the touch screen above the side-emitting LED is a polyester PET layer.

Further, the front shell assembly includes: the touch screen comprises a front shell, a touch screen back adhesive, an LGF and an LGF back adhesive; wherein,

the LGF is fixed on the front shell through LGF back glue; the LGF back glue is positioned in the groove of the front shell;

the touch screen is fixed on the front shell through the touch screen back glue, and the touch screen back glue avoids the LGF area.

Furthermore, side light-emitting LEDs of the FPC assembly are welded on the FPC through a Surface Mount Technology (SMT); the FPC assembly is electrically connected with the PCB through direct welding or a connector mode.

Specifically, the support bracket assembly further comprises: the FPC comprises a support frame, FPC gum and support frame gum, wherein the FPC gum is positioned on the top surface of the support frame; wherein,

the FPC gum is positioned through a groove arranged on the top surface of the support frame; the FPC assembly is fixed on the support frame through a positioning column arranged on the top surface of the support frame and the FPC gum;

the support frame is fixed on the PCB through a positioning column which is arranged on the bottom surface of the support frame and matched with the positioning hole arranged on the PCB.

Further, the height of the support frame is such that light of the side-emitting LED of the FPC assembly supported by the support frame enters the LGF fixed to the front case assembly.

The utility model discloses a Flexible Circuit Board (FPC) that support frame subassembly supported and Printed Circuit mainboard (Printed Circuit Board, PCB) realization electricity is connected, the Light that will be fixed in the side-emitting LED of FPC subassembly maps to on being fixed in the leaded Light membrane (Light Guide Film, LGF) of preceding shell subassembly, by LGF transmits the Light source to the touch key position of LCD non-display area, thereby has realized that the touch key is shaded; therefore, the backlight problem of the touch key is solved, the design space of the appearance of the mobile terminal is enlarged, the reduction of the whole size of the mobile terminal is facilitated, the usability of the mobile terminal is improved, and the user experience is better.

Drawings

Fig. 1 is a three-dimensional exploded schematic view of the mobile terminal of the present invention;

fig. 2 is a schematic cross-sectional view of the mobile terminal of the present invention;

fig. 3 is a schematic perspective exploded view of the front case assembly of the mobile terminal of the present invention;

fig. 4 is a three-dimensional exploded schematic view of the FPC assembly of the mobile terminal of the present invention;

fig. 5 is an exploded perspective view of the support frame assembly of the mobile terminal of the present invention.

Detailed Description

The basic idea of the utility model is that: the mobile terminal supports the FPC assembly electrically connected with the PCB through the supporting frame, light rays of the side light-emitting LEDs of the FPC assembly are mapped onto the LGF of the front shell assembly, and the LGF transmits a light source to the position of the touch key of the LCD non-display area to realize backlight of the touch key.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments are described in detail with reference to the accompanying drawings.

With reference to fig. 1 and fig. 2, fig. 1 shows a three-dimensional decomposition of the mobile terminal of the present invention, as shown in fig. 1, the present invention provides a mobile terminal including: the device comprises a touch screen 1, a front shell assembly 2, an FPC assembly 3, a support frame assembly 4, a PCB 5 and an LCD 6; wherein the front case assembly 2 further comprises a front case 21, a touch screen back adhesive 22, an LGF23, an LGF back adhesive 24; the FPC assembly 3 further includes an FPC 31, a side-emitting LED 32; the support frame assembly 4 further includes a support frame 41, an FPC backing 42, and a support frame backing 43.

Referring to fig. 2, the cross section of the mobile terminal of the present invention is shown in fig. 2, and the supporting frame 41 is fixed on the PCB 5 through the supporting frame back glue 43, and meanwhile, the PCB 5 is provided with two positioning holes, and the supporting frame 41 is provided with positioning columns corresponding to the positioning holes, so as to position the supporting frame assembly 4 on the PCB 5;

one side of the FPC 31 of the FPC assembly 3 may be electrically connected to the PCB 5 by means of direct soldering of the FPC, or other connection means, such as: an FPC plug-in connector may be soldered on the PCB 5 using Surface Mount Technology (SMT) to allow the FPC 31 to be inserted into the connector to make electrical connection with the FCB 5; or one board connector is mounted at each of the FPC 31 and the PCB 5, and the two are electrically connected by the board connector. The other side of the FPC 31 is fixed on the support frame 41 through the FPC gum 42 of the support frame assembly 4, and meanwhile, the support frame 41 is provided with a groove and a positioning column so as to position the FPC gum 42 and the FPC assembly 3 conveniently; the side-emitting LEDs 32 may be soldered on the FPC 31 by SMT. The LGF23 is fixed to the front case 21 by an LGF back adhesive 24, and at the same time, the touch screen 1 is fixed to the front case 21 by a touch screen back adhesive 22 carried by the front case assembly 2 itself.

Generally, The touch screen 1 includes an Over-The-Air (OTA) layer, a Polycarbonate (PC) support plate, and a Polyester (PET) layer, where The OTA layer and The PC support plate need to be cut away in an area of The touch screen 1 above The side-emitting LEDs 32 in order to avoid The side-emitting LEDs 32, and only The PET layer remains.

The PCB 5, which is assembled with the LCD 6, the support frame assembly 4, and the FPC assembly 3, may be assembled to the front case assembly 2 to which the touch screen 1 is fixed.

It should be noted that in the area of LGF23, the touch screen adhesive 22 needs to be correspondingly backed out, and the two cannot overlap. The height of the support frame 41 is such that the light from the side-emitting LED 32 enters the LGF23, so that the LGF23 transmits the light to the position of the touch key in the non-display area of the LCD 6, and the backlight of the touch key is realized.

Fig. 3 is a three-dimensional exploded schematic view of the front shell assembly of the mobile terminal of the present invention, as shown in fig. 3, the front shell assembly 2 includes: a front case 21, a touch screen back adhesive 22, an LGF23, and an LGF back adhesive 24; specifically, the front case 21 is provided with a groove in a region corresponding to the LGF back glue 24 so as to position the LGF back glue 24, and specifically, the LGF back glue 24 may be located in the groove, achieving the positioning, and compensating for the thickness of the LGF back glue 24; meanwhile, the front case 21 is provided with a rib at a region corresponding to the LGF23 so as to position the LGF 23; the touch screen adhesive 22 is correspondingly offset in the area corresponding to the LGF23 to prevent overlapping with the LGF23, making the area too thick.

Fig. 4 is the utility model discloses mobile terminal's FPC subassembly's three-dimensional decomposition schematic diagram, as shown in fig. 4, FPC subassembly 3 specifically includes: FPC 31 and side-emitting LED 32; wherein, the side-emitting LED 32 may be soldered on the FPC 31 by SMT.

Fig. 5 is a three-dimensional exploded schematic view of the support frame assembly of the mobile terminal of the present invention, as shown in fig. 5, the support frame assembly 4 includes: a support frame 41, an FPC backing 42, and a support frame backing 43; a groove and a positioning column are arranged on the top surface of the support frame 41 in a corresponding area of the FPC adhesive 42, so that the FPC adhesive 42 and the FPC assembly 3 can be positioned conveniently; the bottom surface of the supporting frame 41 is also provided with a positioning column, and the positioning column is matched with a positioning hole arranged on the PCB 5, so that the supporting frame component 4 is convenient to assemble and position on the PCB 5.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. The utility model provides a mobile terminal, includes touch-sensitive screen, printed circuit board PCB, liquid crystal display LCD, its characterized in that, mobile terminal still includes: the display device comprises a flexible circuit board FPC assembly, a support frame assembly fixed on a PCB and supporting the FPC assembly, a front shell assembly fixed with a light guide film LGF and a touch key positioned in a non-display area of the LCD; wherein,

2. The mobile terminal of claim 1, wherein the area of the touch screen over the side-emitting LEDs is a polyester PET layer.

3. The mobile terminal of claim 1, wherein the front shell assembly comprises: the touch screen comprises a front shell, a touch screen back adhesive, an LGF and an LGF back adhesive; wherein,

4. The mobile terminal of claim 1, wherein the side-emitting LEDs of the FPC assembly are soldered on the FPC by a patch technology SMT; the FPC assembly is electrically connected with the PCB through direct welding or a connector mode.

5. The mobile terminal of claim 1, wherein the support stand assembly further comprises: the FPC comprises a support frame, FPC gum and support frame gum, wherein the FPC gum is positioned on the top surface of the support frame; wherein,

6. The mobile terminal according to any one of claims 1 to 5, wherein the height of the support frame is such that light of the side-emitting LED of the FPC assembly supported by the support frame enters the LGF fixed to the front case assembly.