JPH04110007U - mobile phone device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the human body from being affected by electromagnetic waves radiated from the antenna of a mobile telephone device and to improve the directivity characteristics. [Configuration] A transmitter 4 in a housing 1 constituting a mobile phone device
An antenna 6 is disposed at a predetermined position below the casing 1 in which the antenna 6 is disposed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a mobile phone device suitable for use in mobile phones such as car phones, and particularly The present invention relates to a mobile telephone device having an antenna disposed in the lower part of the casing.

0002

[Conventional technology]

Recently, various wireless communication system devices have been proposed for communication between mobile bodies. Models such as car phones, personal radios, and mobile phones are also available in car-mounted and shoulder-mounted models. A handheld type and a handheld type are emerging.

0003 For example, these handheld mobile phones can be used even when away from the car phone. A removable plate-shaped inverted F-shaped antenna, etc. attached to a mobile phone for purposes such as is shown in Japanese Patent Publication No. 63-8655.

0004 The outline of the configuration described in the above publication is explained with reference to FIG. The housing is made of synthetic resin, etc., and there is a receiver on the upper side of the front panel 2 of the housing 1. A transmitter 4 is attached to the lower side of the speaker 3.

[0005] An inverted F-shaped antenna 6 is attached to the top of the back plate 5 of the casing 1, and the mobile phone is equipped with an inverted F-shaped antenna 6. The inverted F-shaped antenna 6 has a radiating element 7 in the form of a plate. , the side cross section is formed in an inverted F shape. 8 constitutes the grounding part and 9 constitutes the power supply part. .

[0006] The antenna of the mobile phone configured as described above is a sleeve-type half-wavelength dipole. It is more sensitive to both vertical and horizontal cross-polarized waves than other antennas, making it portable. suitable for

[0007]

[Problem that the idea aims to solve] FIG. 12 shows a state in which the portable telephone device having the above-mentioned configuration is used. child As can be seen from the usage state of , the handset 3 is brought close to the ear of the person 10, so this When the antenna 6 is placed near the device 3, the electromagnetic waves radiated from the antenna 6 can be transmitted to the human body. , there is a problem in that it has a particularly large effect on the eyeballs.

[0008] In particular, recent mobile phone devices use frequencies as high as 1.8 GHz to 2 GHz. Not only is it more powerful, but it is also more powerful. In general, the effects on the human body are 1~ In the 10 GHz band, the wavelength is shorter than that of the living tissue of the human body, which may cause overheating of the living tissue. The resulting tissue damage becomes visible on the surface of the body. An example of this disorder is when the eyeball is damaged. known to be susceptible to damage.

[0009] In particular, there are many cases of cataracts occurring in the eyeballs, and there are safety standards at 1.5 GHz to 300 GHz. As standard, the effective value of electric field strength is 61.4v/m, and the effective value of magnetic field strength is 0.163A. /m and the Telecommunications Technology Council, an advisory body of the Ministry of Posts and Telecommunications.

0010 The present invention eliminates the influence of electromagnetic waves radiated from the antenna 6, and As shown in Figure 12, the directivity characteristics of radio waves from direction A, which is shadowed by person 10's head, have also been improved. The purpose of this invention is to provide a portable telephone device that can be used.

[0011]

[Means to solve the problem]

The mobile phone device of the present invention has a substantially vertically elongated rectangular shape, as shown in FIG. A receiver 3 is housed in the upper part of the housing 1, which has a shape, and a transmitter 4 is housed in the lower part. In the mobile telephone device 11 to which the antenna 6 is fixed, the transmitter 4 of the housing 1 is housed. An antenna 6 is disposed in the lower part of the antenna.

0012

[Effect]

According to the mobile phone device of the present invention, the antenna 6 is located under the housing 1 in which the transmitter 4 is arranged. Since the antenna 6 is placed on the right side, the electromagnetic waves emitted from the antenna 6 are far away from the eyeball. This reduces the harmful effects that cause damage to the human body, and also prevents radio waves from being transmitted by the head of a person. You get something that is not blocked.

[0013]

【Example】

An embodiment of the mobile telephone device of the present invention will be described in detail below with reference to FIGS. 1 to 10. I will clarify.

[0014] Fig. 1 is an external perspective view showing the transmission/reception state of the mobile phone device of this example, and Fig. 2 is a sub-casing. Fig. 3 shows a perspective view of the exterior in a folded state.

[0015] In FIGS. 1 and 2, parts corresponding to those in FIG. Although omitted, the casing 1 is made of a box made of synthetic resin or the like and has an approximately rectangular L-shaped side cross section. The inside includes a transmitting/receiving circuit including a receiver 3 as well as a control circuit. This transmitter/receiver circuit The beginning and end of the are connected to the antenna 6 via a hinge, and when the transmitter/receiver circuit is not in operation, As shown by the solid line in FIG. 2, the sub-casing 12 is folded into the housing 1 from the state shown by the broken line. Ru.

[0016] A receiver 3 is disposed inside the upper end of the panel 2 of the housing 1, and a voice signal from the receiver 3 is received. A plurality of through holes 13 are bored for emitting sounds. Approximately in the center of panel 2 is a diagram. As shown in FIG. 1, the panel 2 has a group of operation keys 14 such as a numeric keypad connected to a control circuit. A hinge part 15 is formed on the lower end side of the sub-casing 12 through this hinge part 15. is rotatably pivoted to the housing 1.

[0017] The sub-casing 12 is a substantially rectangular box made of synthetic resin, and has a side cross section as shown in FIG. It is rotatable via a hinge part 15 at the lower end of the narrow part of the casing 1, which has an inverted L-shape. It is pivoted. As shown in Figure 2, the sub-casing 12 shown in broken lines is folded up as shown in solid lines and carried. When the mobile phone 11 has a compact approximately rectangular shape, the housing 1 is placed on the back side. It has a knob 16 for a locking mechanism to connect and release the As shown in FIG. 1, a through hole 17 for the transmitter 4 is provided on the inside of the side. , an inverted F-shaped antenna 6 is provided.

[0018] In the mobile phone configured as described above, in the state shown in Figure 2 when no transmission or reception is performed, the The casing 10 is folded into the casing 1.

[0019] Next, when the knob 16 for the locking mechanism shown in FIG. 2 is pressed, the housing 1 and the sub-casing 12 are locked together. When the lock is released, the sub-casing 12 rotates around the hinge part 15 as shown by the broken line. It rotates in the clockwise direction and is locked in place as shown by the broken line. antenna 6 It is exposed on the front side of the sub-casing 12 in relation to the rotational movement of the sub-casing 12, and is shown in FIG. The device is set to be ready for sending and receiving.

[0020] For example, the structure of the antenna 6 described above is such that the linear radiating element 6a is reversed as shown in FIG. 3A. The grounding portion 6d is formed by bending it into an L shape and connecting one end to the grounding plate 6b. It may be an inverted F-shaped configuration in which the power feeding part 6c is drawn out from a substantially middle position of the child 6a. . Note that FIG. 3B shows a plan view.

[0021] Of course, the radiation element 6a may be made of a plate instead of a wire. Also, the type of antenna is reversed. It is not limited to F-shaped antennas, but also includes inverted L-shaped antennas, slot antennas, and loop antennas. A printed dipole antenna as well as a printed dipole antenna may be used.

[0022] In FIGS. 1 and 2, the antenna 6 is attached to the lower part of the outer surface of the sub-casing 12, but Of course, it may be arranged at the lower end inside the housing 1 or the sub-casing 12. Furthermore, case 1 and sub It may be attached to the inner and outer lower portions of the casing 12, such as the side, bottom, and rear surfaces.

[0023] FIG. 4 shows an external view of a non-foldable mobile phone 11, in which the antenna 6 is arranged on the lower right side wall 1R of the housing 1 where the transmitter 4 is attached.

[0024] According to each embodiment of the present example described above, as shown in FIG. When the electromagnetic waves radiated from the antenna 6 are at the top of the housing 1 when in the receiving state It is brought to a position further away from the eyeball compared to Therefore, the electromagnetic waves given to living organisms The effect depends on the electromagnetic wave frequency, power density, irradiation time, waveform, etc., but this By adopting a similar configuration, the power density etc. can be significantly reduced and the impact on the eyeballs can be reduced. I can do that.

[0025] Furthermore, radio waves transmitted from the back side of the paper (in the direction of arrow B) on the opposite side of the head 18 The directivity caused by blocking is also improved. In other words, the antenna 6 part in Fig. 5 is the mouth. Because it is located near the source, the radio waves are not blocked by the human body.

[0026] The directional characteristics improved by the present invention will be explained with reference to FIGS. 6 to 10.

[0027] As shown in FIG. 1, the direction perpendicular to the radiating element 6a of the sub-casing 12 is the X axis. The horizontal direction along the front surface of the main body 12 is the Y axis, the vertical direction is the Z axis, and the origin is the power supply part 6c. Then, the directivity pattern in the X-Y plane is shown in Figure 6, the directivity pattern in the Y-Z plane is shown in Figure 7, The directivity patterns in the X-Z plane are shown in FIG. 8, respectively. these antennas In the characteristic pattern diagram, the solid line represents the |Eθ| component of the electric field, and the broken line represents the |Eφ| component. The solid line at the outermost periphery corresponds to the gain of the dipole antenna. φ is from the X axis to the Y axis θ indicates the angle from the Z axis to the X axis direction.

[0028] FIG. 9 shows the back side (front side when folded) of the sub-casing 12 of the mobile phone 11 of this example. Attach the inverted F-shaped antenna 6 and place it on the ear of the person 10's head so that the transmitter 4 is facing down. The figure shows the case where the housing 1 is mounted on the head side of the human body 10 with the length direction of the housing 1 tilted by 60 degrees. .

[0029] The actual measured value of the radiation pattern in this state is as shown in Figure 10. The pattern 19 and the radiation pattern 20 of the horizontally polarized component are obtained without deterioration. Ru. In other words, it is possible to obtain less gain deterioration due to the human head, and also to A portable telephone device having a predetermined sensitivity to both cross-polarized waves of plane polarized waves is obtained.

[0030]

[Effect of the idea] According to the mobile phone device of the present invention, the degree to which the antenna causes damage to the human body can be reduced. It is possible to obtain an object with improved directivity.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a mobile telephone device according to the present invention in a transmitting/receiving state.

FIG. 2 is a perspective view of the folded appearance of the portable telephone device of the present invention.

FIG. 3 is a side view and a plan view of an inverted F-shaped antenna used in the mobile phone device of the present invention.

FIG. 4 is an external perspective view showing another embodiment of the portable telephone device of the present invention.

FIG. 5 is an explanatory diagram of the usage state of the portable telephone device of the present invention.

FIG. 6 is a directivity pattern in the X-Y plane of the antenna used in the present invention.

FIG. 7 is a directivity pattern in the Y-Z plane of the antenna used in the present invention.

FIG. 8 is a directivity pattern in the X-Z plane of the antenna used in the present invention.

FIG. 9 is an explanatory diagram of the use state of the portable telephone device of the present invention in the X-Y plane.

FIG. 10 is an actually measured directivity pattern in the state shown in FIG. 9;

FIG. 11 is a perspective view of a conventional mobile phone device.

FIG. 12 is an explanatory diagram of the usage state of a conventional mobile phone device.

[Explanation of symbols]

1 Housing 2 panels 3 Telephone receiver 4 Transmitter 6 Antenna 11 Mobile phone

Claims (1)

[Scope of utility model registration request] Claim 1: A mobile telephone device in which a receiver is housed in an upper part of a housing formed in a substantially vertically elongated rectangular shape, a transmitter is housed in a lower part, and an antenna is fixed, A portable telephone device, characterized in that the above antenna is disposed in a lower part in which a speaker is housed.