Portable terminal

Abstract

To make the characteristics of an antenna hardly affected even when the antenna is mounted or operated.SOLUTION: In the portable terminal 1, a casing is constituted of a case side peripheral part 3 and a case bottom part 6, and both of them are formed of nonmetallic resins. Then, the main antenna 4b and the sub antenna 4a are formed not on the inner peripheral surface of the case side peripheral part 3 but on the outer peripheral surface, and a cover made of non-metal such as plastic is arranged outside the antenna. The antenna 4 is formed above the center of the case side peripheral portion 3 in the thickness direction, and is separated from the wrist or the palm to which the antenna 4 is attached, thereby preventing the characteristics of the antenna 4 from deteriorating. Furthermore, the antenna 4 is formed in an area not crossing a virtual line (k) passing through a metallic side face button 9 arranged on the circumferential side face of the case so as to reduce the effect of the palm on transmission reception in the case of operating the side face button 9.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a portable terminal device, and more particularly to a portable terminal device that is worn and has various processing functions such as a communication function with an external device. [Background technology]

[0002] 2. Description of the Related Art Small-sized portable terminal devices that can be worn on the wrist or hung from the neck have become widespread. For example, there are watch-type mobile terminal devices that have a communication function, allowing users to check emails received on their smartphones and make calls. Furthermore, with the rise in awareness of health management, portable terminal devices that can be worn on a part of the body such as the wrist, finger, or leg to easily measure vital information while going about one's daily life are becoming more common. Such wearable mobile terminal devices with communication functions are equipped with a data transmission and / or a transmission antenna. For example, Patent Document 1 describes an existing smartwatch in which a slot antenna is implemented in the housing using a metal bezel and a metal back cover, and a smartwatch in which the back cover is made of a non-metal material to ensure comfort when worn, and a plated layer is formed on the inner surface of the non-metallic back cover, thereby forming a slot antenna with the plated layer and metal layer bezel.

[0003] Wearable mobile terminal devices with such communication functions are designed to be worn on the body and operated, so it is important that the communication antenna is not easily affected by the body or operation, and that the antenna characteristics are not easily degraded. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2020-509678 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to make antenna characteristics less susceptible to the effects of wearing and operating a mobile terminal device. [Means for solving the problem]

[0006] The invention described in claim 1 provides a mobile terminal device comprising a non-metallic frame body that forms part of a housing, a bottom that forms part of the housing and is arranged on one side of the frame body, a display device that is arranged on the other side of the frame body, and at least one antenna formed on the outer periphery of the frame body. [Effects of the Invention]

[0007] According to the present invention, the frame constituting part of the housing is made of a non-metallic material, and the antenna is disposed on the outer periphery of this frame, so that it is less susceptible to the effects of mounting and operation. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is an explanatory diagram illustrating the appearance of a mobile terminal device. [Figure 2] AA and BB cross-sectional views of the mobile terminal device. [Figure 3] 4 is an explanatory diagram illustrating the arrangement position of the antenna on the periphery of the case side. FIG. [Figure 4] 1 is an explanatory diagram of the arrangement areas of the side buttons and antenna in a rectangular mobile terminal device. [Figure 5] 1 is an explanatory diagram of the arrangement areas of side buttons and an antenna in a circular mobile terminal device. DETAILED DESCRIPTION OF THE INVENTION

[0009] A preferred embodiment of the mobile terminal device of the present invention will be described in detail below with reference to FIGS. The mobile terminal device 1 in this embodiment is a terminal device that has at least an antenna for communicating with the outside world and is carried by being attached to the human body, such as the wrist, arm, or ankle, or by being hung around the neck. However, in the following embodiment, a mobile terminal device 1 such as a smart watch that is attached to the wrist to obtain the user's vital information will be described as an example.

[0010] (1) Overview of the embodiment In the portable terminal device 1 of this embodiment, the housing is made up of a case peripheral portion 3 and a case bottom portion 6, and at least the former, and preferably both, are made of non-metal (resin in this embodiment). At least one antenna 4 (two in this embodiment, a main antenna 4b and a sub-antenna 4a) is formed on the outer surface rather than the inner surface of the case side peripheral portion 3, and a non-metallic cover made of resin or the like is arranged on the outside of the antenna. The antenna 4 is formed on the case side periphery 3 above the center in the thickness direction (opposite the case bottom 6), and by keeping it away from the wrist or palm on which it is worn, the characteristics of the antenna 4 are prevented from deteriorating. The tip of the element of the main antenna 4b is electromagnetically coupled (capacitively coupled) with the side button 9 made of metal, thereby realizing a smaller antenna for the same frequency.

[0011] In this embodiment, the antenna 4 is formed in an area that does not intersect with the imaginary line k passing through the metal side button 9 arranged on the peripheral side of the housing (case side peripheral portion 3 and case bottom 6), thereby reducing the impact on transmission and reception by the fingertips of the palm when operating the side button 9. If the housing of the mobile terminal device 1 is circular, the imaginary line is a line that passes through the center of the side button 9. On the other hand, if the housing is square, the imaginary line is a line that passes through the side button 9 and runs in a direction perpendicular to the length of the side on which the side button 9 is located (a direction perpendicular to the wrist). The position and direction of this imaginary line are determined from the contact position when the side button 9 is pressed by pinching the mobile terminal device 1 with the index finger and thumb. In order to reduce the influence of the finger position, the antenna 4 is formed in an area that does not intersect with either the side button 9 side or the opposite side of the imaginary line.

[0012] (2) Details of the embodiment FIG. 1 shows the external appearance of a mobile terminal device 1. As shown in FIG. As shown in FIG. 1, the mobile terminal device 1 of this embodiment is fixed to the wrist H by providing belts 2 on two opposing side surfaces of the device body 11. The belt 2 functions as a mounting means for attaching the device main body 11 to the human body in a state in which vital information can be acquired. Although the device body 11 is shown to have a rectangular shape as shown in FIG. 1, various shapes such as a circular shape or a star shape can be adopted.

[0013] The device main body 11 comprises a case side periphery 3, side buttons 9, a liquid crystal display device 5, a case bottom 6, a charging terminal 7, a sensor board 8, and a belt fastener 21, as can be seen in Figure 1(a) which shows the front side when worn on the wrist H, and Figure 1(b) which shows the back side which is in close contact with the wrist H. The case side periphery 3 functions as a non-metallic frame that constitutes part of the housing, and together with the case bottom 6 forms the housing of the mobile terminal device 1. The housing made up of the case side periphery 3 and the case bottom 6 is formed in an annular rectangular shape with rounded edges on all four sides so as to define the outer shape of the device main body 11. Although details will be described later, at least one antenna 4 (in this embodiment, a sub-antenna 4a and a main antenna 4b) is disposed on the outer peripheral surface of the case side peripheral portion 3 (see FIGS. 2 and 3). A flange 35 for mounting a liquid crystal display device 5 (described later) is formed on the upper surface side (opposite the case bottom 6 in the thickness direction) of the open upper and lower surfaces of the case side periphery 3. The flange 35 is formed to protrude inward (toward the center) of the case side periphery 3. In this embodiment, the case side peripheral portion 3 is formed from a non-metallic resin in order to prevent a decrease in the radiation efficiency of the antenna installed therein, but it may also be formed from other non-metallic materials such as ceramics.

[0014] The side button 9 is a switch button that penetrates the peripheral side surface of the case side peripheral portion 3, and is an input device for performing operations such as instructing the mobile terminal device 1 to start acquiring vital information. As shown in FIG. 1, the side button 9 of this embodiment is arranged on the side of the back of the hand (fingertip side) when the mobile terminal device 1 is worn on the left wrist. Although FIG. 1 shows a state in which only one side button 9 is provided, it is also possible to provide two or more side buttons.

[0015] The liquid crystal (LCD) display device 5 is disposed on the flange portion 35 of the case side periphery 3, and has glass on the top surface to protect the liquid crystal. Although the liquid crystal display device 5 is used in this embodiment, it is also possible to use an AMOLED (Active Matrix Organic Light-Emitting Diode, active matrix organic EL) module. The liquid crystal display device 5 and the AMOLED function as a display device. The liquid crystal display device 5 has a liquid crystal display for displaying the vital sign information detected in this embodiment, displaying various information corresponding to the clock function and image display function of the mobile terminal device 1, and displaying various information transmitted from external devices. The liquid crystal display device 5 has various touch panels arranged on the upper surface of the liquid crystal display, and a glass cover arranged on the top surface. The touch panel is an input device that causes the liquid crystal display device 5 to function as an input device. The touch panel detects the position touched (pressed) by the user, and acquires inputs and instructions corresponding to various icons and the like displayed on the liquid crystal display corresponding to the touched position.

[0016] The case bottom 6 is fixed to the lower surface side (opposite the liquid crystal display device 5) of the upper and lower open surfaces of the case side peripheral portion 3, thereby forming the housing of the device main body 11 together with the case side peripheral portion 3. In this embodiment, the case side peripheral portion 3 and the case bottom portion 6 are formed as separate bodies, but they can also be formed as an integrated body. In this embodiment, the case bottom 6, like the case side peripheral portion 3, is formed from a non-metallic material such as resin in order to suppress a decrease in antenna radiation efficiency, but it can also be formed from a metallic material. The case bottom 6 is made of the same material as the case side peripheral portion 3, but can also be made of a different material. However, when the case side peripheral portion 3 and the case bottom 6 are integrally formed, the same material is used. The case bottom 6 is formed with a through hole for the sensor board 8 and a through hole for the charging terminal portion 7 .

[0017] The charging terminal section 7 is a member for charging the battery 32 (see FIG. 2) housed inside the device body 11, and includes a charging terminal board and terminals. The charging terminal board of this embodiment is connected to the battery 32 via a connecting wire (not shown). Part of the terminal of the charging terminal unit 7 penetrates the case bottom 6 and is exposed to the outside, and the exposed terminal of the charging terminal unit 7 is connected to a charging IC and a charger (not shown), thereby charging the internal battery 32.

[0018] The sensor board 8 is a board on which sensors for acquiring vital information of a user wearing the mobile terminal device 1 are arranged, and a part of the board including the sensor is arranged to penetrate the case bottom 6. The sensor board 8 is positioned so as to protrude slightly from the case bottom 6, and is therefore positioned so as to come into closer contact with the user's skin (wrist H) (see FIG. 2). The sensor board 8 is provided with sensors corresponding to the vital sign detection function of the mobile terminal device 1, and at least one of various sensors is provided to detect, for example, the user's heart rate, pulse wave, respiratory rate, blood pressure, blood oxygen concentration (SpO2), body temperature, etc.

[0019] The belt stoppers 21 are members for fixing the belt 2 to the device body 11, and are disposed on two opposing end faces of the case bottom 6. The belt stoppers 21 may also be disposed on the case side periphery 3.

[0020] Next, the internal configuration of the mobile terminal device 1 will be described. Fig. 2 shows a cross section of the mobile terminal device 1, conceptually illustrating the arrangement of each part in the thickness direction. Fig. 2(a) shows the AA cross section along the length of the belt 2 of the mobile terminal device 1 in Fig. 1(a), and Fig. 2(b) shows the BB cross section along the length of the wrist H at the position of the sensor board 8. In the following description, the length direction of the belt 2 of the mobile terminal device 1 is referred to as the vertical direction, the length direction of the wrist H (the direction perpendicular to the front-to-back direction) is referred to as the horizontal direction, and the direction in which the case bottom 6 of the mobile terminal device 1 and the liquid crystal display device 5 face each other is referred to as the thickness direction.

[0021] As shown in FIG. 2, within the mobile terminal device 1, a sensor board 8, a battery 32, a main board 34, and a liquid crystal display device 5 are arranged in this order from the bottom (wrist side). Conduction is achieved by conductive sheets between the liquid crystal display device 5 and the main board 34, and further between the main board 34 and the sensor board 8. This makes the liquid crystal display device 5, main board 34, and sensor board 8 as a whole into a single board, strengthening the GND (ground) on the return side of the antenna 4 and suppressing noise.

[0022] As described above, the sensor substrate 8 is disposed in one of the two through holes formed in the case bottom 6, with a portion of the sensor substrate 8 protruding from the case bottom 6 in the thickness direction. The sensor board 8 is fixed inside the device body 11 to the case bottom 6 by a metal sensor board holder 81 using screws or tape.

[0023] Of the side surfaces of the battery 32, both horizontal sides (see FIG. 2(b)) and the vertical side of the charging terminal 7 (the front side, see FIG. 2(a)) are fixed by the battery holder 33, for a total of three sides, thereby preventing horizontal movement. Note that the battery holder 33 may fix two or four sides of the battery 32 instead of three sides. The battery 32 is a power source that supplies power to the main board 34 and the sensor board 8, and is a rechargeable battery such as a lithium ion battery or a nickel-metal hydride battery. By arranging the battery 32 between the main board 34 and the sensor board 8, rather than between the liquid crystal display device 5 and the main board 34, it is possible to keep the battery 32 away from the RF circuit (described later) which is a heat source.

[0024] The main board 34 functions as a specified board, and is equipped with a control unit consisting of a CPU, ROM, RAM, memory device, etc., and various elements that are used to realize the various functions and information processing that the mobile terminal device 1 has, such as the function of acquiring vital information, a clock function, a communication function, and a screen display function. The ROM and storage device store various programs that enable the CPU to realize the functions of the mobile terminal device 1. For example, the CPU executes a vital information program to calculate vital information such as heart rate and blood oxygen concentration from data detected by the sensor board 8, display it on the liquid crystal display device 5, transmit it to an external device via the antenna 4, and receive instructions from the external device.

[0025] An RF circuit (not shown) for transmitting and receiving radio frequency (RF) signals is also provided on main substrate 34. By providing this RF circuit on the surface of main substrate 34 facing liquid crystal display device 5, the distance (length of wiring) to power feeders 42a and 42b (see FIG. 3(b)) formed on flange 35 can be shortened, and power loss due to the wiring to power feeders 42a and 42b and emission of radio waves can be suppressed. The liquid crystal display device 5 is as described above.

[0026] As shown in Figure 2(a), the charging terminal section 7 is located in the other of the two through holes formed in the case bottom section 6, and is fixed to the case bottom section 6 from above (the liquid crystal display device 5 side) by a charging terminal holder (not shown) using screws or tape. The charging terminal holder is formed of a conductive material such as metal or conductive resin.

[0027] Furthermore, in the mobile terminal device 1 of this embodiment, at least one antenna 4 is disposed on the outer peripheral surface of the case side peripheral part 3 (see FIG. 2(a)). The outer peripheral surface of the case side peripheral portion 3 is covered with an antenna cover 41 for protecting the antenna 4 formed on the outer peripheral surface thereof. The antenna cover 41 of this embodiment is made of the same resin as the case side peripheral portion 3, but may be made by applying an insulating paint or by insulating plating. In addition, in FIGS. 2(a) and 2(b), the antenna 4 (4a, 4b) and the antenna cover 41 are shown exaggerated in size to clearly show their presence.

[0028] The antennas 4 include various antennas 4 corresponding to the various functions of the mobile terminal device 1, such as an LTE antenna, a GNSS (Global Navigation Satellite System) antenna, a WLAN antenna, and a Bluetooth antenna, for transmitting and receiving data (for example, transmitting detected vital sign information, receiving various processing instructions, making calls, sending and receiving emails, etc.) to and from various external devices such as a smartphone, a personal computer, and a server. Depending on the function of the mobile terminal device 1, the antennas 4 may be used not only for transmission and reception, but also as antennas dedicated to transmission or reception.

[0029] In this embodiment, two antennas, a sub-antenna 4a and a main antenna 4b (hereinafter, when describing both antennas in common, they will be referred to as antenna 4) are arranged on the outer peripheral surface of the case side peripheral portion 3, each above the center in the thickness direction of the case side peripheral portion 3 (towards the liquid crystal display device 5). In this way, by forming the antenna 4 in an area as far away as possible from the human body (wrist) in the thickness direction, it is possible to prevent the radiation efficiency of the antenna 4 from being deteriorated by the human body (wrist) and also to reduce the SAR value (Specific Absorption Rate) of the antenna 4. In this embodiment, the antenna 4 is disposed above the center of the case side periphery 3, but because both the case side periphery 3 and the case bottom 6 are made of non-metallic materials, the antenna 4 may be disposed above the center of the thickness of the housing including both. However, to further reduce the influence of the human body, it is preferable to dispose the antenna 4 above the center of the case side periphery 3 as in the embodiment.

[0030] The sub-antenna 4a is disposed on the little finger side (upper side in FIG. 1(a)) of the case side periphery 3 in the vertical direction, and the main antenna 4b is disposed on the thumb side (lower side) in the vertical direction. The antenna 4 is formed as a thin film by vapor deposition, but it can also be formed as a thin film by other methods such as sputtering. Alternatively, a separately formed thin antenna 4 may be attached to the outer periphery of the case side periphery 3 by adhesion or the like. By arranging the antenna 4 on the outer peripheral surface of the case side peripheral portion 3, it is easier to form it by vapor deposition compared to forming it inside the case side peripheral portion 3, and since the area (length) in which the antenna is formed is longer, it is easier to form an antenna of a length corresponding to the required wavelength.

[0031] As the antenna 4, a monopole antenna (1 / 4λ), a dipole antenna (1 / 2λ), an inverted-F antenna, a planar inverted-F antenna, or the like is used. Then, by transmitting and receiving data (for example, transmitting detected vital information, receiving various processing instructions, making calls, sending and receiving emails, etc.) between various external devices such as smartphones, personal computers, and servers, one or more antennas 4 for LTE (Long Term Evolution), GNSS, WLAN, BT (Bluetooth), and BLE (Bluetooth Low Energy) are arranged in correspondence with the functions of the mobile terminal device 1 as antennas 4 to realize the various functions of the mobile terminal device 1. In the mobile terminal device 1 of this embodiment, the sub-antenna 4a is used as an LTE sub-antenna for reception, a GNSS antenna, and a WLAN antenna. On the other hand, the main antenna 4b is used as an LTE main antenna for transmission and reception.

[0032] Next, the arrangement of the sub-antenna 4a and the main antenna 4b will be described. Figure 3 is an explanatory diagram of the antenna placement position on the case side periphery 3, where Figure 3(a) is a view from the liquid crystal display device 5 side in the thickness direction, and Figure 3(b) is a view from the case bottom 6 side in the thickness direction. As shown in Figure 3(a), the antenna 4 of this embodiment is positioned to minimize the influence of the wearer's fingertips when operating the side buttons 9 for operation arranged on the side of the case side periphery 3. Normally, when operating the side button 9, the mobile terminal device 1 is held between the index finger and thumb. Therefore, the index finger comes into contact with the side button 9, and the thumb comes into contact with a position opposite the side button 9. Since the mobile terminal device 1 of this embodiment has a rectangular shape, the index finger and thumb come into contact with the position where the imaginary line k that passes through the side button 9 and extends in the width direction of the mobile terminal device 1 intersects with the case side periphery 3.

[0033] The antenna 4 of this embodiment is placed at a position that does not intersect with this imaginary line k. That is, by positioning the sub-antenna 4a vertically above the imaginary line k and the main antenna 4b below it, the antenna 4 does not intersect with the imaginary line k, so even if a finger comes into contact with the case side periphery 3 when the side button 9 is operated, the antenna performance is prevented from being degraded by the finger.

[0034] Also, as shown in Figure 3(b), a power supply section 42a to the sub-antenna 4a and a power supply section 42b to the main antenna 4b are formed on a flange section 35 formed toward the inside of the case side peripheral section 3. The power supply units 42a and 42b are both located on the side away from the side button 9, that is, in the area opposite to the position where the side button 9 is located. In this way, power supply parts 42a and 42b, through which the most current flows when power is supplied to antenna 4, are located on the opposite side (away from) side button 9. Therefore, even if the wrist is bent upward while wearing mobile terminal device 1 as shown in FIG. 1 and the back of the palm approaches or touches side button 9, the characteristics of antenna 4 are prevented from deteriorating.

[0035] The sub-antenna 4a of this embodiment is dedicated to reception in LTE communications and does not transmit, so there is no need to consider SAR. Therefore, the antenna area is reduced by folding the entire length of the antenna back halfway. On the other hand, the main antenna 4b not only receives but also transmits, so it is extended without folding back in order to suppress the SAR value. Furthermore, by forming the tip of the main antenna 4b close to the metal part provided for mounting the side button 9 (or the side button 9 made of metal), electromagnetic coupling (capacitive coupling) is achieved, which lowers the resonant frequency of the antenna, which is an LC resonance (lengthens the wavelength), thereby enabling miniaturization.

[0036] As described above, according to the mobile terminal device 1 of this embodiment, the case side periphery 3 and case bottom 6 that constitute the housing of the mobile terminal device 1 are made of non-metallic resin, and the antenna 4 (sub-antenna 4a, main antenna 4b) is arranged on the outer peripheral surface rather than inside the case side periphery 3, and closer to the liquid crystal display device 5 than the center in the thickness direction of the case side periphery 3. In this way, in the mobile terminal device 1 of this embodiment, the antenna 4 is arranged at a position away from the human body (wrist) and the main board 34, which makes it possible to suppress the SAR value and also suppress the influence of the human body on the antenna characteristics, thereby enabling the antenna characteristics to be obtained. Furthermore, by forming the antenna 4 in an area that does not intersect with an imaginary line passing through the side button 9, and by forming the power supply sections 42a and 42b for the antenna 4 in an area away from the side button 9, deterioration of the characteristics of the antenna 4 can be suppressed.

[0037] The above describes one embodiment of the mobile terminal device 1 of the present invention, but the present invention is not limited to the described embodiment, and various modifications can be made within the scope, embodiment, and modified example described in each claim. For example, in the embodiment described above, one side button 9 is arranged above the vertical center of the case side periphery 3, but depending on the functions of the mobile terminal device 1, it is also possible to have other positions and other numbers of side buttons.

[0038] FIG. 4 is an explanatory diagram of the arrangement areas of the side buttons 9 and the antenna 4 in the portable terminal device 1, which has a square shape like the present embodiment. The mobile terminal device 1 shown in FIG. 4(a) shows a case where the side button 9 is disposed at approximately the center of the case side peripheral portion 3 in the vertical direction. In this case, the placement area of ​​the antenna 4 is a formation area 401 above an imaginary line k (a line connecting 3 o'clock and 9 o'clock) that passes through the side button 9 and is perpendicular to the vertical direction, and a formation area 402 below the imaginary line k (a line connecting 3 o'clock and 9 o'clock) (both are ranges indicated by double-headed arrows; the same applies below). The antenna 4 is formed in either or both of the formation areas 401 and 402 on the outer circumferential surface of the case side periphery 3. The same applies to the embodiment and other modified examples in that one or more antennas 4 can be provided depending on the various functions of the mobile terminal device 1. As in the described embodiment and other variations, the end of the antenna formation area is spaced T cm (e.g., 0.8 cm, preferably 1 cm) from the imaginary line k to avoid the effects of finger manipulation, but it is also possible to space it more than T cm away.

[0039] The mobile terminal device 1 shown in FIG. 4(b) shows a case where the side buttons 9 are arranged on the lower side (thumb side) of the case side periphery 3 in the vertical direction. The side button 9 of this mobile terminal device 1 is positioned in the reverse vertical position of the side button 9 of the mobile terminal device 1 described in the embodiment (see Figure 3), and a virtual line is assumed to be the line connecting 4 o'clock and 8 o'clock. In FIG. 4(b), only the wide area above the imaginary line k is set as the formation area 403, but it is also possible to form an antenna in the area below as a formation area.

[0040] The mobile terminal device 1 shown in FIG. 4(c) shows a case where the side button 9a is disposed in the same position as in the embodiment, and the side button 9b is disposed in the same position as in FIG. 4(b). In this case, the imaginary line connecting 2 o'clock and 10 o'clock is the imaginary line ka of the side button 9a, and the line connecting 4 o'clock and 8 o'clock is the imaginary line kb of the side button 9b. In FIG. 4(c), the antenna is formed in a formation region 404 above the imaginary line ka and in a formation region 405 below the imaginary line kb. In addition, when the sub-antenna 4a and the main antenna 4b are formed on the outer peripheral surface of the case side peripheral portion 3 of the mobile terminal device 1 shown in Figure 4(c) at the positions described in this embodiment in Figure 3, one or both ends of the length of the main antenna 4b will intersect with the imaginary line kb, but it is possible to achieve the effect of suppressing deterioration of the characteristics of the sub-antenna 4a.

[0041] Furthermore, in the embodiment described above, the portable terminal device 1 has a rectangular shape, but a portable terminal device 1 having a circular shape can also be configured in the same manner as in the embodiment. FIG. 5 is an explanatory diagram of the arrangement areas of the side buttons 9 and the antenna 4 in the circular mobile terminal device 1. As shown in FIG. FIG. 5(a) shows a case where one side button 9 is located at the 2 o'clock position, and FIG. 5(b) shows a case where two side buttons 9 are located at the 2 o'clock and 4 o'clock positions. When the mobile terminal device 1 has a circular shape, the imaginary line k (ka, kb) corresponds to a line passing through the center from the side buttons 9 (9a, 9b). That is, in Fig. 5(a), it corresponds to the imaginary line k connecting 2 o'clock and 8 o'clock, and in Fig. 5(b), it corresponds to the imaginary line ka connecting 2 o'clock and 8 o'clock and the imaginary line kb connecting 4 o'clock and 10 o'clock. Then, one or more antennas 4 are formed within the formation regions 411, 412, 413, and 414 that do not intersect with the imaginary line k (ka, kb).

[0042] Note that, for each side button 9 described in Figures 4 and 5, the side button 9 may be arranged on the opposite side of the illustrated imaginary line k, and further, the side button 9 may be arranged on both sides of the imaginary line k.

[0043] In the embodiment described above, a mobile terminal device 1 such as a smart watch that is worn on the wrist to acquire vital information of the user has been described, but it is also possible to target a mobile terminal device with more functions or fewer functions, as long as it is equipped with an antenna 4 for realizing at least a communication function. In this case, the communication function may be either a transmission function or a reception function. For example, the mobile terminal device 1 may be provided with only the function of receiving an incoming call notification from a smartphone and informing the user of the incoming call by vibration or sound, and may be provided with an antenna 4 dedicated to receiving the call for this purpose.

[0044] The mobile terminal device 1 in the embodiment and modified examples described above can be configured as follows. (Configuration 1) A non-metallic frame that constitutes a part of the housing; a bottom portion forming a part of the housing and disposed on one side of the frame; a display device disposed on the other side of the frame; At least one antenna formed on the outer periphery of the frame body; A mobile terminal device comprising: (Configuration 2) The antenna is formed closer to the display device than the center of the housing in the thickness direction. 2. The mobile terminal device according to configuration 1, (Configuration 3) The antenna is formed on the outer peripheral surface of the frame by vapor deposition. 3. The mobile terminal device according to configuration 1 or 2. (Configuration 4) An operation button is provided on the housing for performing a predetermined operation on an internal device, the antenna is disposed at a position that does not intersect with a virtual line k that connects the operation button and a position on the frame body on the side facing the operation button; 4. The mobile terminal device according to claim 1, 2, or 3, (Configuration 5) The frame body is formed in a substantially circular shape, The virtual line k passes through the center of the operation button and the frame body. 5. The mobile terminal device according to configuration 4. (Configuration 6) The frame body is formed in a rectangular shape, the virtual line k is an opposite side that faces the side on which the operation buttons are arranged, and passes through the same longitudinal position as the position of the operation buttons in the longitudinal direction of the side. 5. The mobile terminal device according to configuration 4. (Configuration 7) A power supply section for the antenna is formed on the side opposite to the operation button. 7. The mobile terminal device according to any one of configurations 4 to 6, wherein: (Configuration 8) The frame body is covered with an antenna cover that protects an antenna formed on the outer periphery. 8. The mobile terminal device according to any one of configurations 1 to 7, wherein: (Configuration 9) A wearing means for wearing the mobile terminal device on a human body; a sensor unit that detects biological information while the device is attached by the attachment means; a transmitting means for transmitting the detected biological information to an external device via the antenna; 9. The mobile terminal device according to any one of configurations 1 to 8, comprising: [Explanation of symbols]

[0045] 1. Mobile terminal device 2 Belt 3 Case side periphery 4 Antennas 4a Sub-antenna 4b Main antenna 5 LCD display device 6 Bottom of the case 7 Charging terminal section 8 Sensor board 9, 9a, 9b Side buttons 11 Device body 21 Belt stopper 32 Batteries 33 Battery Folder 34 Main board 35 Flange 41 Antenna cover 42a, 42b Power supply section 81 Sensor board holder 401~405, 411~414 formation area k, ka, kb virtual lines

Claims

1. a non-metallic frame that constitutes a part of the housing; a bottom portion forming a part of the housing and disposed on one side of the frame; a display device disposed on the other side of the frame; At least one antenna formed on the outer periphery of the frame body; A mobile terminal device comprising:

2. the antenna is formed closer to the display device than the center of the housing in the thickness direction, 2. The mobile terminal device according to claim 1, wherein:

3. the antenna is formed by vapor deposition on the outer peripheral surface of the frame body.

2. The mobile terminal device according to claim 1, wherein:

4. an operation button formed on the housing for performing a predetermined operation on an internal device; the antenna is disposed at a position that does not intersect with a virtual line k that connects the operation button and a position on the frame body on the side facing the operation button; 2. The mobile terminal device according to claim 1, wherein:

5. The frame body is formed in a substantially circular shape, The virtual line k passes through the center of the operation button and the frame body.

5. The mobile terminal device according to claim 4.

6. The frame body is formed in a rectangular shape, the virtual line k is an opposite side that faces the side on which the operation buttons are arranged, and passes through the same longitudinal position as the position of the operation buttons in the longitudinal direction of the side; 5. The mobile terminal device according to claim 4.

7. A power supply section for the antenna is formed on the side facing the operation button.

5. The mobile terminal device according to claim 4.

8. The frame is covered with an antenna cover that protects an antenna formed on the outer periphery.

2. The mobile terminal device according to claim 1, wherein:

9. a wearing means for wearing the mobile terminal device on a human body; a sensor unit that detects biological information while the device is attached by the attachment means; a transmitting means for transmitting the detected biological information to an external device via the antenna; 9. The mobile terminal device according to claim 1, further comprising:

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