JP7324597B2 - mobile terminal - Google Patents

Description

The present invention relates to mobile terminals.

2. Description of the Related Art Conventionally, there is a mobile terminal device having an antenna built in a housing (see Patent Document 1, for example).

JP 2013-187884 A

Fifth generation communication (5G) requires high antenna performance for mobile terminals including smart devices such as smartphones and tablet terminals. For this reason, it is considered that the housing of the mobile terminal is made of resin, which has less influence on the antenna than metal. However, when a resin material is used as the material of the housing, there are many restrictions on manufacturing, such as the need to mold the housing so that the thickness of the housing is uniform as a countermeasure against sink marks.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable terminal capable of obtaining a desired strength and using an antenna suitably.

The present invention is a mobile terminal. This mobile terminal includes a display panel, a resin housing that is joined to the back surface of the display panel and forms an internal space that houses components including a circuit board,
a resin-made first core member fixedly arranged between the first part of the parts and the inner surface of the housing, which is arranged on the back side of the display panel in the upper end of the internal space; ,
a resin-made second core material fixedly arranged between the second part of the parts and the inner surface of the housing, which is arranged on the back side of the display panel at the lower end of the internal space; , including
The first core member has a front surface facing the first component and a back surface facing the inner surface of the housing and having a first antenna conductor formed thereon,
The second core member has a front surface facing the second component and a back surface facing the inner surface of the housing and having a second antenna conductor formed thereon.

ADVANTAGE OF THE INVENTION According to this invention, a desired intensity|strength can be obtained and an antenna can be used suitably.

FIG. 1 shows a configuration example of a mobile terminal. FIG. 2 shows an exploded perspective view (when viewed from the rear side) of the mobile terminal. FIG. 3 shows an exploded perspective view (when viewed from the front side) of the mobile terminal. FIG. 4 is a diagram showing a configuration example of the first chassis. FIG. 5 is a diagram showing a configuration example of the second chassis. FIG. 6 is a view of the lower end surface of the second chassis. FIG. 7 shows another embodiment of the second chassis. FIG. 8 is a diagram illustrating a method of attaching the second chassis to the housing. FIG. 9 is a diagram illustrating a method of attaching the second chassis to the housing. FIG. 10 shows a plan view of the first chassis and the second chassis fixedly arranged in the housing. FIG. 11 is a diagram showing a cross section of the upper end portion of the mobile terminal. FIG. 12 is a diagram showing a cross section of the lower end portion of the mobile terminal.

A mobile terminal according to an embodiment includes the following.
(1) Display panel.
(2) A resin housing that is joined to the display panel to form an internal space that accommodates components including a circuit board.
(3) A resin-made first core material fixedly arranged between the first part of the parts and the inner surface of the housing, which is arranged on the back side of the display panel in the upper end of the internal space.
(4) A second resin-made second part fixedly arranged between the second part of the parts and the inner surface of the housing, which is arranged on the back side of the display panel in the lower end of the internal space. Core material.
The first core member has a front surface facing the first component and a back surface facing the inner surface of the housing and on which the first antenna conductor is formed. and a rear surface facing the inner surface of the housing and formed with the second antenna conductor.

According to the portable terminal, since the first and second core members are fixedly arranged in the housing, even if the housing has a uniform wall thickness for countermeasures against sink marks, the desired rigidity against impact can be achieved. can be obtained. In addition, the antenna conductor is formed on the back surface of the resin-made first and second core members, which are insulators, so that the antenna conductor faces the opposite side of the parts including the circuit board. As a result, the antenna can be kept away from conductive parts that generate noise, such as circuit boards and displays, so that the characteristics of the antenna can be maintained in a favorable state. That is, the desired strength can be obtained and the antenna can be used favorably.

In the mobile terminal, a configuration may be adopted in which the battery of the mobile terminal is arranged in the middle part of the internal space between the first core material and the second core material. Since the battery is also a conductor component, if the above configuration is adopted. The antenna conductor is kept away from the battery in the vertical direction of the internal space. This allows the antenna to be used favorably.

The antenna conductors formed in each of the first core member and the second core member may conform to or conform to the same wireless communication standard or conform to or conform to different wireless communication standards. Also, two or more types of antenna conductors may be formed on at least one of the first core material and the second core material. A part of the antenna conductor formed on the second core member extends from the rear surface of the second core member to the lower end surface of the second core member. It may be in a state of straddling . The rear surface and the lower end surface are an example of a surface (antenna surface) on which the antenna conductor is formed. The lower end surface is an example of "a surface different from the rear surface" and does not necessarily have to be the lower end surface. The two antenna planes are preferably perpendicular to each other from the viewpoint of widening the radio wave radiation range, but they can be set at an appropriate angle larger or smaller than the right angle. The shape (antenna pattern) of the antenna conductor can be selected appropriately as long as it can transmit and receive radio waves of a desired wavelength. Also, the number of antenna conductors formed on the first core member and the second core member can be appropriately set to 1 or 2 or more.

Further, in the mobile terminal, the second core member is slidable in the vertical direction in the housing by the guide portion of the housing, and when slid downward in the housing, the second core material is slidable in the lower end portion of the internal space. Alternatively, a configuration may be adopted in which the second core material is fixed in the housing by engaging both ends of the second core material in the width direction with engaging portions formed in the housing.

Hereinafter, terminal devices according to embodiments will be described with reference to the drawings. The configuration of the embodiment is an example, and the present invention is not limited to the configuration of the embodiment.

<Configuration of terminal device>
1A and 1B are diagrams for explaining the external configuration of the mobile terminal 10. FIG. 1A shows the external appearance of the front surface 10a of the portable terminal 10, and FIG. 2 shows an exploded perspective view of the mobile terminal 10 (when viewed from the rear side), and FIG. 3 shows an exploded perspective view of the mobile terminal 10 (when viewed from the front side). The mobile terminal 10 according to the embodiment is a smart phone, but may be a mobile terminal other than a smart phone (such as a tablet terminal, for example).

As shown in FIGS. 1 to 3, the portable terminal 10 has a rectangular flat plate shape in front and has a vertical direction (longitudinal direction: Y direction), a width direction (lateral direction: X direction), and a thickness direction (Z direction). formed. The mobile terminal 10 has a display panel 21 and a housing 30 joined to the display panel 21 . The housing 30 is also called a housing, case, cover, or the like. The mobile terminal 10 accommodates components 23 , a battery 24 , a first chassis 40 and a second chassis 50 in an internal space formed by bonding a housing 30 to a display panel 21 . The first chassis 40 is an example of a "first core", and the second chassis 50 is an example of a "second core". The first chassis 40 is also called a first core, and the second chassis 50 is also called a second core.

A display screen (screen) is provided over the entire front face 21a of the display panel 21 forming the front face 10a of the mobile terminal 10, and a receiver 22 is provided at the upper end of the front face 10a (Fig. 1A).

In addition, a plurality of holes 11a, 12a, and 13a are formed in the wall of the housing 30 forming the back surface 10b of the mobile terminal 10, and the fingerprint sensor 11, the light flash panel 12, and the camera panel 13 are exposed ( 2 and 1B). Holes 14a and 15a are also formed in the side wall 30b of the housing 30 forming the right side of the mobile terminal 10, and the buttons 14 and 15 protrude from the inside of the housing 30 (see FIGS. 3 and 1B).

A component 23 (an example of a “component including a circuit board”) is arranged on the back side of the display panel 21 . In this embodiment, the component 23 includes an upper component 23a (an example of a first component) and a lower component 23b (an example of a second component). Each of upper component 23a and lower component 23b includes a circuit board, but it is not essential that both include circuit boards. The circuit board included in the upper part 23a includes an integrated circuit (MCU (microprocessing unit)) that executes various functions of the mobile terminal 10, such as the above-described fingerprint sensor 11, light, camera, processor, memory, and radio wave modulation/demodulation circuit. unit), etc.) are installed. In addition, a USB connector (female type) used for charging and reading/writing data, an earphone jack hole, and a microphone hole are provided on the lower end surface of the mobile terminal 10 . A battery 24 that serves as a power source for the mobile terminal 10 is arranged on the back side of the display unit 20 . Note that the display panel 21 and the component 23 are the front side member 20 when viewed from the first chassis 40 and the second chassis 50 .

As shown in FIG. 3, the housing 30 includes a wall (referred to as a bottom wall 30a) that forms the back surface 10b of the mobile terminal 10, and a rectangular annular side wall rising from the outer edge of the bottom wall 30a toward the front of the mobile terminal 10. 30b are integrally formed by resin molding. A recess 31 is formed by an inner surface 30a1 of the bottom wall 30a and an inner surface 30b1 of the side wall 30b.

A flange (rib) 30c protruding from the sidewall inner surface 30b1 is formed at the upper end of the sidewall 30b (see FIGS. 8B, 11 and 12). The ribs 30c are arranged on the same plane in the X direction and the Y direction of the mobile terminal 10, and when the display panel 21 and the housing 30 are joined together, the ribs 30c come into contact with the outer edge portion 21c of the rear surface 21b of the display panel 21. . The display panel 26 and the housing 30 are joined by adhering the abutting portions between the ribs 30c and the outer edge portion 21c with an adhesive tape 30d (FIG. 12) or the like. However, the method of joining the display panel 21 and the housing 30 may be a method other than the above.

A hollow internal space S is formed when the housing 30 and the display panel 21 are joined together, and the internal space S accommodates the components 23 and the battery 24 . A first chassis 40 and a second chassis 50 are provided to fill this internal space.

FIG. 4 is a diagram showing a configuration example of the first chassis 40. As shown in FIG. 4A is a front view of the first chassis 40, and FIG. 4B is a rear view of the first chassis 40. FIG. The first chassis 40 is made of resin and has a front surface 40a facing the upper part 23a and a rear surface 40b facing the inner surface 30a1 of the housing 30. As shown in FIG. The first chassis 40 has a three-dimensional shape having unevenness, holes, ribs, etc., matching the surface shape of the upper part 23a. An antenna conductor 60 (an example of a first antenna conductor) conforming to a predetermined wireless communication standard is formed on the rear surface 40b of the first chassis 40. As shown in FIG. The antenna conductor 60 includes antenna conductors 60a and 60b having a predetermined antenna pattern.

FIG. 5 is a diagram showing a configuration example of the second chassis 50. As shown in FIG. 5A is a front view of the second chassis 50, and FIG. 5B is a rear view of the second chassis 50. FIG. The second chassis 50 is also made of resin, and has a front surface 50a facing the lower part 23b and a rear surface 50b facing the inner surface 30a1 of the housing 30. As shown in FIG. The second chassis 50 has a three-dimensional shape with unevenness, holes, ribs, etc. that match the shapes of the holes of the USB connector and the earphone jack. For example, at the center of the second chassis 50 is formed a part 50e that defines a hole into which a male USB connector is inserted. When the inside of the inserted male USB connector is twisted, the part 50a suppresses the torsion and rotation of the connector, thereby preventing the shape and contact arrangement of the female connector from being damaged. do. An antenna conductor 70 (an example of a second antenna conductor) conforming to a predetermined wireless communication standard is formed on the rear surface 50b of the second chassis 50 .

FIG. 6 is a view of the lower end surface of the second chassis 50. FIG. The second chassis 50 has a lower end surface that is continuous with the rear surface 50b and bent at a substantially right angle. In this embodiment, lower end surfaces 50c and 50d are formed with a component 50e that defines the hole of the connector therebetween. The antenna conductor 70 is formed across the rear surface 50b and the lower end surfaces 50c and 50d of the second chassis 50. As shown in FIG. In other words, part of the antenna conductor 70 extends from the rear surface 50b to the lower end surfaces 50c and 50d. The antenna conductor 60 and the antenna conductor 70 are connected to the feeder circuit and modulation/demodulation circuit included in the component 23 . The lower end surfaces 50c and 50d are examples of "surfaces different from the rear surface". The angle formed by the back surface 50b and the lower end surfaces 50c and 50d is 90° in this embodiment, but may be larger or smaller than 90°. However, from the viewpoint of widening the radio wave radiation range of the antenna in three-dimensional space, when the antenna conductor straddles two planes and each plane forms an antenna plane, these two planes are perpendicular to each other (approximately 90°). there is) is preferred.

FIG. 7 shows another embodiment of the second chassis (second chassis 50A). In the second chassis 50A, the antenna conductor 70A is formed on the back surface 50b and not formed on the bottom end surface. Such a form can also be applied as long as a suitable radio environment can be obtained.

Note that each of the housing 30, the first chassis 40, and the second chassis 50 is made of glass fiber reinforced plastic. The housing 30 is a mixed plastic of polyamide (PA) and glass fiber. The first chassis 40 and the second chassis 50 are polycarbonate (PC) and AB
It is a mixed plastic of S resin and glass fiber, but the compounding ratio and material types are different. The housing 30, the first chassis 40, and the second chassis 50 may be made of materials other than those described above as long as they are made of resin.

Wireless communication standards include, but are not limited to, 3G (W-CDMA, etc.), 4G (LTE, etc.), wireless LAN (Wi-Fi), 5G, Bluetooth (registered trademark), BLE, Zigbee, and the like. In addition, as a method of forming the antenna conductors 60 and 70, various existing forming techniques such as plating of metal materials, sputtering, vapor deposition, printing of conductive materials, and the like can be applied.

8 and 9 are diagrams illustrating a method of attaching the second chassis 50 to the housing 30. FIG. 8A is a plan view showing a state in which the second chassis 50 is placed in the recess 31 of the housing 30, and FIG. 8B shows a cross section along line AA in FIG. 8A. FIG. 9A shows the state after the second chassis 50 has been slid inside the housing 30, and FIG. 9B shows a cross-sectional view taken along line BB of FIG. 9A. FIG. 10 shows a plan view of the first chassis 40 and the second chassis 50 fixedly arranged on the housing 30 . 11 is a cross-sectional view of the upper end portion of the mobile terminal 10, and FIG. 12 is a cross-sectional view of the lower end portion of the mobile terminal 10. As shown in FIG. 11 and 12 show the state of the first chassis 40 and the second chassis 50 arranged in the internal space S formed by joining the display panel 21 and the housing 30 together.

As shown in FIGS. 8, 9, and 10, the dimension (the former) in the width direction (X direction) of the second chassis 50 and the distance ( The latter) are almost the same (the latter is slightly longer than the former). Therefore, when the housing 30 is placed on a flat surface with the inner surface 30a1 of the housing 30 facing upward, and the width direction of the second chassis 50 is aligned with the width direction of the housing 30, the second chassis 50 is placed on the housing 30. The Y-axis coincides with the Y-axis of the second chassis 50, and is accommodated in the recess 31 in a state in which it hardly rotates on the XY plane. In this state, the side walls 30b, 30b forming the left and right side surfaces of the housing 30 serve as guides, and the second chassis 50 is easily slidable toward the lower end of the housing 30. As shown in FIG. At the lower end of the housing 30, a pressing member 33 (also referred to as a rib or a flange) protrudes into the recess 31 from the inner surface of the side wall 30b.

When the second chassis 50 is moved downward and slid to a position where the lower end thereof does not move downward any more, the ribs 33 are fitted into the grooves 33a (see FIG. 6) of the second chassis 50. As shown in FIG. Also, as shown in the cross-sectional view of FIG. 12, the lower end surface of the second chassis 50 comes into contact with the inner surface 30b1 of the side wall 30b and is adhered via the adhesive tape 35. As shown in FIG. Also, the upper end surface of the second chassis 50 abuts on the projection 34 projecting from the inner surface 30a1. In this manner, the second chassis 50 is fixed to the housing 30 . The protrusion 34 prohibits upward movement of the second chassis 50, and prohibits the second chassis 50 from being pushed in and upwardly moved when a male USB connector is inserted. The back surface 50b of the second chassis 50 has a surface that comes in close contact with the inner surface 30a1 of the housing 30, and is integrated with the housing 30 by being fixed to the housing 30. As shown in FIG.

10, the first chassis 40 is arranged at the upper end of the housing 30. As shown in FIG. At this time, the rear surface 40b of the first chassis 40 is adhered to the inner surface 30a1 of the housing 30 with an adhesive tape. As a result, the first chassis 40 is fixed to the upper end portion of the recess 31 of the housing 30 . In a state where the first chassis 40 and the second chassis 50 are fixedly arranged in the recess 31 of the housing 30, the components 23 and the battery 24 are stacked, and the display panel 21 is aligned with the housing 30 and overlapped, These edges are adhered to join the housing 30 and the display panel 21 . Of course, the first chassis 40, the second chassis 50, the component 23, the battery 24, and the display panel 21 are electrically connected at appropriate portions before bonding. In this way, the second chassis 50 is fixedly arranged at the lower end of the internal space S when the housing 30 and the display panel 21 are joined together (FIG. 12). Also, the first chassis 40 is fixedly arranged in the upper end portion of the internal space S when the housing 30 and the display panel 21 are joined together (FIG. 11). Since the first chassis 40 and the second chassis 50 are arranged in a fixed manner, the portable terminal 10 receives an external impact and a compressive force with a double-supported structure. It becomes a state showing rigidity (strength).

<Effects of Embodiment>
The mobile terminal 10 includes a display panel 21 and a resin housing 30 that is joined to a rear surface 21b of the display panel 21 to form an internal space S that houses components 23 including a circuit board. In addition, the mobile terminal 10 is fixedly arranged between the first part 23a of the parts 23 and the inner surface 30a1 of the housing 30, which is arranged on the back side of the display panel 21 in the upper end portion of the internal space S. A first chassis 40 made of resin is included. In addition, the mobile terminal 10 is fixedly arranged between the lower part 23b of the parts 23 and the inner surface 30a1 of the housing 30, which is arranged on the back side of the display panel 21 in the lower end portion of the internal space S. includes a second chassis 50 made from The first chassis 40 has a front surface 40a facing the upper part 23a and a rear surface 40b facing the inner surface 30a of the housing 30 and having the first antenna conductor 60 formed thereon. The second chassis 50 also has a front surface 50a facing the lower part 23b and a rear surface 50b facing the inner surface 30a of the housing 30 and having the antenna conductor 70 formed thereon.

According to the mobile terminal 10, since the first chassis 40 and the second chassis 50 are fixedly arranged within the housing 30, the mobile terminal 10 and the housing 30 have a certain rigidity (strength) against an external impact. is displayed. That is, the desired rigidity (strength) can be obtained even if the housing 30 having a uniform thickness is employed. Further, the first chassis 40 is only adhered to the housing 30 , and the second chassis 50 is slid to the lower end portion of the housing 30 to be fixedly arranged. In this way, the assembly can be completed with a simple work. In addition, the antenna conductors 60 and 70 may be arranged with the insulators of the first chassis 40 and the second chassis 50 interposed therebetween while being kept away from the circuit included in the component 23 and conductor components such as the battery 24 . Therefore, it is less likely to be affected by conductive parts. Thus, the antenna can be used in favorable environments.

Also, the antenna conductor 70 may be formed on the rear surface 50b and the lower end surfaces 50c and 50d of the second chassis 50 as well. As a result, it is possible to ensure an appropriate length of the antenna conductor according to the wavelength. Also, since the lower end surfaces 50c and 50d are located away from the battery 24, they are less likely to be affected by the battery 24. FIG.

As described above, the second chassis 50 is slidable in the vertical direction (Y direction) within the housing 30, and when slid to the lower end portion of the housing 30, the second chassis 50 A portion of the rear surface 50b of the second chassis 50 is fixed to the housing 30 by engaging grooves 33a provided at both ends in the width direction with ribs 33 (engaging portions) formed on the housing 30. . The configurations of the embodiments described above can be combined as appropriate.

DESCRIPTION OF SYMBOLS 10... Portable terminal 21... Display panel 30... Housing 40... First chassis 50... Second chassis 60, 70... Antenna conductor

Claims (4)

a display panel;
a resin housing that is joined to the display panel and forms an internal space for housing components including a circuit board;
a resin-made first core member fixedly arranged between the first part of the parts and the inner surface of the housing, which is arranged on the back side of the display panel in the upper end of the internal space; ,
a resin-made second core material fixedly arranged between the second part of the parts and the inner surface of the housing, which is arranged on the back side of the display panel at the lower end of the internal space; , including
The first core member has a front surface facing the first component and a back surface facing the inner surface of the housing and having a first antenna conductor formed thereon,
The second core member has a front surface facing the second component and a back surface facing the inner surface of the housing and having a second antenna conductor formed thereon,
mobile terminal. 2. The portable terminal according to claim 1, wherein a battery is arranged in an intermediate portion of said internal space between said first core material and said second core material. 3. The mobile terminal according to claim 1, wherein a portion of said second antenna conductor extends to a lower end surface of said second core member that is continuous with said back surface of said second core member. The second core member is slidable in the vertical direction inside the housing by a guide portion of the housing, and when slid downward in the housing, the second core member is slidable in the lower end portion of the internal space. 4. The second core material according to claim 1, wherein both ends of the second core material in the width direction are engaged with engaging portions formed in the housing to fix the second core material in the housing. 1. The portable terminal according to item 1.

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