JP5439514B2 - Mobile terminal device - Google Patents

Description

  The present invention relates to a portable terminal device including an optical element inside a panel.

  In a mobile terminal device, an optical element such as a light emitting element or an optical reflector may be mounted inside the panel.

  In addition, in an electronic device equipped with an optical element, in order to allow light to enter and exit from a predetermined region and to eliminate interference between adjacent optical elements, the periphery of the optical element is individually separated by a light-shielding partition. In some cases, a grid-shaped light shielding member is provided (see, for example, Patent Document 1).

JP 2008-090767 A

  When an elastic body is applied as the light shielding member and the light shielding member is sandwiched and fixed between the panel and the substrate, pressure is applied from the inside to the outside of the panel by the elastic force. In order to eliminate light leakage at a required location, it is necessary to press and contact the light shielding member to such an extent that the light shielding member is slightly elastically deformed so that no gap is generated between the light shielding member and the panel.

  If the panel fixing structure is provided with a lock mechanism that prevents the panel from floating outward, the small pressure applied from the inside of the panel does not matter. However, for example, in the case of a fixing structure in which the panel is bonded and fixed without a locking mechanism, a request to minimize the pressure applied from the inside of the panel in consideration of long-term deterioration of the bonding and fixing. Occurs.

  An object of the present invention is to provide a portable terminal device having a light guide structure of an optical element that can reliably block a necessary portion of a light path and reduce the pressure applied from the inside of a panel.

A portable terminal device according to one embodiment of the present invention includes an optical element that emits light or detects incident light, a substrate on which the optical element is provided, a panel that is disposed to face the substrate, and a light shielding property. A partition member that is elastically deformed by being sandwiched between the substrate and the panel, and that partitions a light path between the panel and the optical element, partition member, an end portion in contact with the substrate or the panel, have a notch to reduce the thickness than the intermediate portions of the substrate and the panel, the corners of the contact portion to the panel in the partition member Has a curved surface with a predetermined curvature, and there is a difference between the curvature of the corner near the light path at the contact portion and the curvature of the corner far from the light passage at the contact portion. Take a configuration.

  According to the present invention, the elastic partition member can surely block a necessary portion of the light passage, and can reduce the pressure applied from the inside of the panel by the notch.

The disassembled perspective view which shows the whole portable terminal device of embodiment of this invention The perspective view which looked at the surface by the side of the display panel of a shading member facing up The perspective view which looked at the substrate side surface of the light shielding member 4A is a plan view showing the display panel side of the light shielding member, FIG. 4B is a first side view of the light shielding member, FIG. 4C is a second side view of the light shielding member, and FIG. 4D is a plan view showing the substrate side of the light shielding member. Sectional drawing which shows the state which has arrange | positioned the light-shielding member on a board | substrate An enlarged cross-sectional view showing details of a contact portion on the display panel side of the light shielding member An enlarged cross-sectional view showing details of a contact portion on the display panel side of the light shielding member

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Overall configuration>
FIG. 1 is an exploded perspective view showing the entire portable terminal device according to the embodiment of the present invention.

  The mobile terminal device of this embodiment is a multi-function mobile phone called a so-called smartphone.

  As shown in FIG. 1, the portable terminal device includes a display panel 10, a sheet metal member 20, an electronic substrate 40, an electronic component 44, a battery pack 48, a housing 50, and a light shielding member (corresponding to a partition member). 60). A substrate 70 having a plurality of optical elements 71, 72, 73 is fixed to the upper end portion of the sheet metal member 20.

  In the following, unless otherwise specified, the front / rear and up / down directions of the mobile terminal device are as follows: the display panel 10 side is the front, the housing 50 side is the rear (rear side), the side on which the electronic board 40 is disposed is the upper side, and the battery pack 48. The side on which is placed will be described below.

  The display panel 10 has, for example, an OLED (Organic light-Emitting Diode) formed in a planar shape, and the front surface is covered with a reinforcing panel.

  The display panel 10 is bonded and fixed to the fixing surface 51 of the housing 50 with an adhesive at the entire periphery of the edge facing the sheet metal member 20. The part that is bonded and fixed is a part that is out of the display area of the display panel 10. The area of the bonding surface is designed to be small, thereby narrowing the frame of the display unit (narrowing the frame around the display area).

  As a fixing structure of the display panel 10, a structure in which the display panel 10 is fixed to the housing 50 only by the above-described bonding is employed without a lock mechanism for stopping the display panel 10 from being lifted forward. ing. Furthermore, since the adhesive surface is made small to narrow the display frame, the pressure applied to the display panel 10 from the inside of the apparatus to the outside is required to be as small as possible.

  The sheet metal member 20 is not particularly limited, and is configured by pressing and bending a metal plate. The sheet metal member 20 has a substantially rectangular shape that extends in a direction along the opening of the housing 50, and an upright portion 22 a that is bent at a substantially right angle (L-shaped cross section) with respect to the plate surface is formed around the sheet metal member 20. . The upright portion 22 a acts to increase the rigidity of the sheet metal member 20.

  In the sheet metal member 20, locking portions 32 that are locked to the locked portions 55 of the housing 50 are formed of resin at a plurality of locations on the left and right edges. The locking portion 32 is formed with a locking claw that is locked in the locking groove 55 a of the locked portion 55. At the four corners of the sheet metal member 20, through-holes 23 for screwing to the housing 50 are provided.

  The electronic substrate 40 includes circuit components that provide various functions such as a communication function, a display function, and an input / output function, although not particularly limited thereto. In addition, a connector 41 connected to the display panel 10 via a flexible cable, a connector portion 42 to which a connector plug is connected from the outside, and the like are mounted on the electronic substrate 40.

  Although the electronic component 44 is not particularly limited, the electronic component 44 is a long block-like component provided with an antenna element, an electrostatic touch sensor, and a light emitting element.

  The casing 50 is a so-called bathtub type in which one wide surface is opened and an accommodation space shallower than the diameter of the opening is formed inside, and is formed of resin. A fixing surface 51 for bonding and fixing the display panel 10 is formed on the opening peripheral edge of the housing 50. The fixed surface 51 is a narrow surface parallel to the back surface of the display panel 10 and is formed over the entire circumference of the housing 50.

  A plurality of locked portions 55 for fixing the sheet metal member 20 are formed on the inner surface of the housing 50. A locking groove 55 a is formed in the locked portion 55. Further, screw holes 58 for fixing the sheet metal member 20 with screws are provided in the four corners inside the housing 50. A plug insertion hole 52 into which a connector plug is inserted from the outside is also formed on the inner wall of the housing 50.

  A plurality of optical elements 71 to 73 are mounted on the substrate 70 as described above. Among these, the optical element 71 is a light emitting element (for example, a light emitting diode), the optical element 72 is an infrared transmitting element, and the optical element 73 is an infrared receiving element. The optical elements 72 and 73 constitute a proximity sensor (photo reflector) that detects the proximity of an object.

  The plurality of optical elements 71 to 73 are mounted on the substrate in an arrangement parallel to the left-right direction at a location near the upper end of the sheet metal member 20.

<Structure of light shielding member>
FIG. 2 is a perspective view of the light shielding member as viewed from the display panel side, and FIG. 3 is a perspective view of the light shielding member as viewed from the substrate side. 4A is a plan view showing the display panel side of the light shielding member, FIG. 4B is a first side view of the light shielding member, FIG. 4C is a second side view of the light shielding member, and FIG. 4D is a plan view showing the substrate side of the light shielding member. It is. FIG. 5 is a cross-sectional view showing a state where the light shielding member is arranged on the substrate.

  As shown in FIGS. 2 to 5, the light shielding member 60 has a plurality of light guide holes (hereinafter referred to as light paths) that transmit light between the plurality of optical elements 71 to 73 and the display panel 10. It is a lattice-shaped member. The light shielding member 60 is composed of a relatively soft member (for example, silicon rubber) having elasticity and light shielding properties. The two light guide holes corresponding to the optical elements 72 and 73 in the light shielding member 60 are formed to have substantially the same size as the diameter of the optical elements 72 and 73. The light guide hole may be formed larger than the diameter of the optical elements 72 and 73.

  The light shielding member 60 has a structure in which a plurality of wall bodies 61 to 63 surrounding the four sides of the optical elements 71 to 73 are connected. A diffusion sheet 68 that diffuses light is fixed to the wall body 61 that surrounds the four sides of the optical element 71 so as to cross the light path.

  The wall bodies 61 to 63 are formed with notches (spaces for reducing the thickness) E1a, E1b, E2a, E2b, E2c, E3a, and E3b at the end portions that contact the display panel 10 or the substrate 70. Yes. This notch is not formed after resin molding, but is formed at the same time as the walls 61 to 63 during resin molding.

  In other words, the cutouts E1a, E1b, E2a, E2b, E2c, E3a, and E3b are structural portions in which the walls 61 to 63 are formed from the display panel 10 side to the substrate 70 side with the same thickness as the central thick portion. This is a space representing a portion obtained by subtracting the actual wall bodies 61 to 63.

  The notches E1a, E1b, E2a, E2b, E2c, E3a, and E3b are formed over a longer range in the direction along the light path than the chamfer formed at the corner of a general molded part.

  Next, each notch E1a, E1b, E2a, E2b, E2c, E3a, E3b will be described in detail.

  The cutout E1a is provided on the side of the wall body 61 that surrounds the four sides of the optical element 71 in contact with the display panel 10. The notch E1a is provided on the side close to the optical path of the optical element 71, and is continuous over the four directions of the optical path. The thin portion 61a (see FIG. 5) whose thickness is reduced by the notch E1a is configured to be continuous over the four sides of the optical path on the side far from the optical path of the optical element 71.

  The notch E <b> 1 b is provided on the side of the wall body 61 that surrounds the four sides of the optical element 71 in contact with the substrate 70. The cutout E1b is provided on the side of the wall body 61 that surrounds the four sides and is connected to the adjacent wall body 62, and the thickness of the connecting portion with the adjacent wall body 62 is reduced (thin portion 61b).

  The notch E <b> 2 a is provided on the side of the wall body 62 that surrounds the four sides of the optical element 72 in contact with the display panel 10. The notch E2a is provided on the side close to the optical path of the optical element 72, and is continuously provided over the four directions of the optical path. The thin portion 62a (see FIG. 5) whose thickness is reduced by the notch E2a is configured to be continuous over the four directions of the optical path on the side far from the optical path of the optical element 72.

  The notches E <b> 2 b and E <b> 2 c are provided on the side of the wall body 62 that surrounds the four sides of the optical element 72 in contact with the substrate 70. As shown in FIG. 3, the notches E2b and E2c are formed so as to cut out the entire two ranges connected to the adjacent walls 61 and 63 among the four walls 62. In addition, these notches E2b and E2c are formed so as to cut out the ranges on both sides from the inside to the outside of the optical path, leaving the central portion in the remaining two sides. The thin portions 62b and 62b whose thickness is reduced by the notches E2b and E2c are erected only at the center of two of the four sides around the optical element 72.

  The notch E3a is provided on the side of the wall body 63 that surrounds the optical element 73 in contact with the display panel 10. This notch E3a is provided on the side close to the optical path of the optical element 73, and is continuous across the four directions of the optical path. The thin portion 63a (see FIG. 5) whose thickness is reduced by the notch E3a is configured to be continuous over the four directions of the optical path on the side far from the optical path of the optical element 72.

  The notch E3b is provided on the side of the wall body 63 that surrounds the four sides of the optical element 73 in contact with the substrate 70. The notch E3b is provided on the side close to the optical path of the optical element 73 and is continuously provided over the four directions of the optical path. The thin portion 63b (see FIG. 5) whose thickness is reduced by the notch E3b is configured to be continuous over the four sides of the optical path on the side far from the optical path of the optical element 72.

<Deformation structure of thin part>
6 and 7 are enlarged cross-sectional views showing details of contact portions on the display panel side of the light shielding member. In these drawings, the fixing position of the display panel 10 is indicated by a two-dot chain line.

  As shown in FIG. 6, curved surfaces R1 and R2 having different curvatures are formed on the inner side (side closer to the optical path) and on the outer side (side far from the optical path), as shown in FIG. In this embodiment, the outer radius of curvature is designed to be small and the inner radius of curvature is designed to be large so that the thin portion 61a does not fall inward.

  When the display panel 10 is fixed, the light shielding member 60 is fixed between the display panel 10 and the substrate 70 in an elastically deformed state. At this time, in the vicinity of the wall body 61 that surrounds the four sides of the optical element 71, the thin portion 61a is mainly elastically deformed and fixed. Here, since the tip of the thin part 61a has the curved surfaces R1 and R2 as described above, the thin part 61a does not fall down to the inside of the optical path, and the thin part 61a is evenly spread over all four sides of the optical path. It is elastically deformed and fixed so as to collapse.

  Further, as shown in FIG. 7, a C surface (chamfering) R <b> 3 is formed at a concave angle between the thin portion 62 a and the thick intermediate portion of the wall body 62 that surrounds the four sides of the optical element 72. .

  When the display panel 10 is fixed, the thin portion 62a is elastically deformed and fixed around the wall 62 surrounding the four sides of the optical element 72. Here, since the C surface R3 is formed at the base reentrant angle of the thin portion 62a, the thin portion 62a is elastically deformed so as to be evenly crushed across the four directions of the light path without falling down to the inside of the light path. To be fixed.

  As described above, according to the mobile terminal device of the present embodiment, the notches E1a, E1b, E2a, E2b, E2c, and the like are provided on the side of the light shielding member 60 that contacts the display panel 10 or the side that contacts the substrate 70. E3a and E3b are formed. In other words, the side of the light shielding member 60 that contacts the display panel 10 or the side that contacts the substrate 70 has thin portions 61a, 61b, 62a to 62c, 63a that are thinner than the thick portion of the middle step. 63b. Therefore, when the light shielding member 60 is sandwiched between the display panel 10 and the substrate 70 and fixed in an elastically deformed state, the pressure applied from the light shielding member 60 to the display panel 10 can be reduced.

  In addition, since the light shielding member 60 is sandwiched between the display panel 10 and the substrate 70 and is fixed in an elastically deformed state, the light shielding member 60 is securely attached to the display panel 10 and the substrate 70 at a necessary portion where it is not desired to leak light. It is possible to reliably perform light shielding at that location.

  In particular, for the optical element 71 which is a light emitting element, the wall 61 surrounds the entire periphery without any gaps, so that light does not leak from other places, and an excellent light emission process is realized. It is possible.

  In addition, the optical element 73 that is an infrared receiving element is surrounded by the wall 63 without any gaps, so that it is possible to prevent erroneous detection of infrared rays that have entered from other parts, and unexpected detection noise. Has come to decrease.

  The embodiments of the present invention have been described above.

  In the above-described embodiment, the light shielding member 60 has been described by taking a lattice-shaped member surrounding a plurality of light paths as an example. However, the light shielding member may be a member that encloses only one light path, and it is not necessary to enclose four sides of one light path. You may employ | adopt the shape which has the wall body which becomes.

  In the above-described embodiment, the notches E1a, E2a, E3a, and E3b are formed on the side close to the optical path, and the thin portions 61a, 62a, 63a, and 63b are formed as a configuration in which notches are formed continuously in four directions of the optical path. The configuration formed on the side far from the optical path has been described as an example. However, these may be reversed so that a cutout is provided on the side far from the optical path and the thin portion is disposed on the side close to the optical path.

  In the above embodiment, the configuration in which the present invention is applied to the optical elements 71 to 73 and the light shielding member 60 provided inside the display panel 10 on the front surface of the apparatus has been described as an example. However, for example, in an apparatus configuration in which a small panel provided on the back of the apparatus and an optical element are provided inside the small panel, the partition member (light shielding member) of the present invention is applied to the optical element and the small panel. May be.

  The present invention is useful for a portable terminal device having a panel and an optical element.

DESCRIPTION OF SYMBOLS 10 Display panel 20 Sheet metal member 60 Light-shielding member 61-63 Wall body 61a, 61b, 62a, 62b, 63a, 63b Thin part E1a, E1b, E2a-E2c, E3a, E3b Notch 70 Substrate 71-73 Optical element

Claims (1)

An optical element for emitting light or detecting incident light;
A substrate on which the optical element is provided;
A panel disposed opposite the substrate;
A partition member having light shielding properties and elasticity, sandwiched between the substrate and the panel and fixed in an elastically deformed state, and partitions a light path between the panel and the optical element;
Comprising
The partition member has an end portion in contact with the substrate or the panel, have a notch to reduce the thickness than the intermediate portions of the substrate and the panel,
A curved surface having a predetermined curvature is formed at the corner of the partition member in contact with the panel.
The portable terminal device in which there is a difference between the curvature of the corner on the side close to the light path in the contact portion and the curvature of the corner on the side far from the light path in the contact portion .

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