JPH04132713U - mobile phone - Google Patents

Abstract

(57) [Summary] [Objective] To provide a mobile phone that ensures good transmission and reception characteristics even when the antenna is stored so as not to get in the way when being carried. [Configuration] In a mobile phone that makes a call by wireless communication using a wireless telephone line, an antenna 4 for wireless communication is used.
can be arranged in at least two states, an upright state and a bent state, with respect to the mobile phone body 2, and when the antenna 4 is in the upright state, the antenna 4 can be connected to the feeding point via a predetermined matching circuit. When the antenna 4 is connected and the antenna 4 is bent, the antenna 4 is directly connected to the feeding point.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a mobile phone that makes calls using a wireless telephone line.

0002

[Conventional technology]

In recent years, various small mobile phones using wireless telephone lines have been developed. By owning this type of mobile phone, you can access electricity anywhere within the service area. You can use the story and it is convenient.

0003

[Problem that the idea aims to solve]

By the way, this type of mobile phone is a wireless device, so it requires a communication antenna. It is essential. Ideally, this antenna should be placed so that it protrudes from the phone body. By protruding in this way, characteristics such as directivity improve, resulting in good transmission. ・Reception becomes possible. However, if the antenna protrudes from the main body, There was an inconvenience that got in the way. For this reason, general portable communication devices (transceivers) (e.g.), you can install a retractable antenna and retract it inside the main body when not in use. There are some items that are stored in the .

0004 However, in the case of a mobile phone, there is no way to know when the phone will be called. Therefore, it is necessary to always keep it in a reception standby state so that it can receive control signals, etc. There is a point. For this reason, if the structure is such that the antenna is retracted, the reception There is an inconvenience that performance may deteriorate and control signals etc. may not be received correctly. , it was not desirable to attach a retractable antenna to a mobile phone.

[0005] The purpose of this invention is to prevent the antenna from getting in the way while being carried, even when the antenna is stored. The object of the present invention is to provide a mobile phone that ensures good transmission and reception characteristics.

[0006]

[Means to solve the problem] The present invention provides wireless communication using wireless telephone lines, as shown in FIGS. 1 to 3, for example. In a mobile phone that makes a call, the wireless communication antenna 4 is connected to the mobile phone. It can be placed in at least two states, an upright state and a bent state, relative to the main body 2. In addition, when the antenna 4 is in an upright state, the and connect the antenna 4 to the feeding point 12, and when the antenna 4 is bent, The antenna 4 is connected to a feeding point 12.

[0007]

[Effect]

By doing this, when the antenna is in the upright position, the specified matching circuit It functions as a monopole antenna connected to the feed point via the antenna, and has good characteristics. At the same time, when the antenna is bent, it can be connected directly to the feeding point in an inverted L shape. Functions as an antenna or inverted F-type antenna, ensuring good characteristics even when bent. be done.

[0008]

【Example】

Hereinafter, one embodiment of the mobile phone of the present invention will be described with reference to the accompanying drawings.

[0009] The mobile phone in this example is a digital radio that communicates by sending and receiving digital data. This is applied to those that use telephone lines, and uses the 1.8 GHz frequency band. Communication takes place.

0010 FIG. 1 is a perspective view showing the mobile phone of this example. In this figure 1, 1 is a mobile phone This mobile phone 1 has a main body 2 and a lid 3 that can be opened and closed on the main body 2. It consists of In this case, the main body 2 includes an antenna 4, an ear receiver 5, and a plurality of keys 6. is disposed, and a transmitter section 7 is disposed on the lid body 3. In this case, the antenna 4 is It is attached to one end side of the stepped portion 2a on the upper surface of the main body 2. Then, there is a wireless Contains circuit components for communication over telephone lines, batteries for power supply, etc. (not shown) so that the other party's voice can be heard from the speaker attached to the receiver 5. Yes, the microphone attached to the transmitting part 7 of the lid body 3 picks up the voice of the caller. be. Dial operations and the like can be performed by operating the keys 6.

[0011] When the lid 3 is closed, the key 6 is covered and stored by the lid 3. The transmitter 7 on the lid 3 side is also located inside the lid 3. It is arranged so that it is stored inside when the lid body 3 is closed.

0012 In this example, the antenna 4 is attached to the stepped portion 2a on the top surface of the main body 2. It is made so that it can be bent. That is, the antenna 4 of this example is capable of transmitting and receiving This app consists of a metal rod of approximately 4 cm that is suitable for the frequency band (1.8 GHz) to be transmitted. The base end side of the antenna 4 is a joint part 4a, and this joint part 4a can be rotated. At the center, the antenna 4 can be bent. In this case, Figure 1 shows the state in which the antenna 4 is vertically erected, and by bending it from this state, the stepped portion 2 Antenna 4 is housed in a. That is, FIGS. 2 and 3 show this antenna 4 and main body 2. Figure 2 shows the antenna 4 in the upright position, and Figure 3 shows the antenna 4 in the upright position. As shown in Fig. 3, the antenna 4 is shown bent and stored. In this state, the antenna 4 fits into the stepped portion 2a and does not protrude from the top surface of the main body 2. In addition, as shown by the broken line in FIGS. 2 and 3, there is a metal counter inside the top surface of the main body 2. A shooting plate 8 is arranged.

[0013] The connection state of this antenna 4 to the transmitting/receiving circuit is shown in FIGS. 2 and 3. Connect the end 4b of the antenna 4 inside the main body 2 to the movable contact 11m of the changeover switch 11 It has been done. Then, the first fixed contact 11a of this changeover switch 11 is connected to the coil L. It is connected to the feed point 12 via a matching circuit consisting of a capacitor C and a capacitor C. , the second fixed contact 11b of the changeover switch 11 is directly connected to the power supply point 12. . Then, the power feeding point 12 is connected to the transmitting/receiving circuit side. In this case, selector switch 1 Switching of the movable contact 11m of No. 1 is performed according to the state of the antenna 4. Ru. That is, when the antenna 4 is in an upright state as shown in FIG. 1m to the first fixed contact 11a, and the antenna 4 is bent as shown in FIG. In this state, the movable contact 11m is connected to the second fixed contact 11b.

[0014] Note that the state of the antenna 4 can be detected by detecting, for example, anything near the joint portion 4a. This can be done by providing a detection mechanism, etc.

[0015] By configuring the antenna 4 and its surroundings in this way, the mobile phone of this example is , whether the antenna 4 is upright or bent, it works well in both cases. can be used. In other words, in the upright position as shown in Figure 2, the antenna 4 is connected to a matching circuit consisting of a coil L and a capacitor C, forming a monopole antenna. communication via wireless telephone lines. This model In the case of a nopole antenna, there is an advantage that the directivity characteristics are improved. And figure When the coil L and capacitor C are bent and stored as shown in 3, The matching circuit is separated, but the matching circuit is separated from the reflector 8 which is placed almost parallel to the antenna 4. A matching circuit is formed according to the spacing of the antenna, and functions as an inverted L-shaped antenna. Good properties are also ensured. However, when making this turn, the direction is better than when standing upright. For example, when in reception standby mode, the control channel signal transmission may be slightly degraded. When this mobile phone is called, it receives a signal on this control channel. It has sufficient characteristics to Then, bend the antenna 4 and store it like this. If you receive a call while the caller is using the If the antenna 4 is placed upright, better reception can be achieved.

[0016] In the case of this example, digital communication is performed using the 1.8 GHz frequency band. Since this is a mobile phone for use on a wireless telephone line, the antenna length is relatively short and the antenna is relatively short. Even when the antenna 4 is bent and stored, the characteristics of the antenna can be maintained. It's relatively easy.

[0017] In addition, when antenna 4 is bent and stored, it functions as an inverted F-type antenna. You may also do this. That is, as shown in FIG. 4, the step portion 2a on the top surface of the main body 2 A terminal 13 is provided almost in the center, and the antenna 4 can be bent only when the antenna 4 is bent. contact with the terminal 13 of. Then, the end portion 4b inside the main body 2 of the antenna 4 is connected to the coil. The first fixation of the changeover switch 14 is performed through a matching circuit consisting of The terminal 13 is connected to the contact 14a, and the terminal 13 is connected to the second fixed contact 14b. And cut The movable contact 14m of the switching switch 14 is connected to the power feeding point 12. Then, switch The movable contact 14m of the switch 14 is switched depending on the state of the antenna 4. That is, a The movable contact 14m is connected to the second fixed contact 14b only when the antenna 4 is bent. When the antenna 4 is connected and the antenna 4 is placed upright, the movable contact 14m is connected to the first fixed contact 1. Connect to 4a. The other parts are configured similarly to the example in FIG.

[0018] With this configuration, the feeding point 12 is located approximately at the center of the antenna 4 when bending. It is connected to the terminal 13 side that is in contact with the antenna, and functions as an inverted F-type antenna. Furthermore, when standing upright, it functions as a monopole antenna, similar to the example shown in FIG. Therefore , In the case of the example shown in Fig. 4, good transmission and reception is possible both when standing upright and when bending. . In addition, in the case of this inverted F-type antenna, by adjusting the position of terminal 13, the quality can be improved. A good match can be made.

[0019]

[Effect of the idea]

According to the present invention, when the antenna is in an upright position, the It functions as a monopole antenna connected to the feeding point, and has good characteristics. In addition, even when the antenna is bent, an inverted L-shaped antenna that is connected directly to the feed point can be used. Functions as a na or inverted F-type antenna, ensuring good characteristics even when bent. . Therefore, even if the antenna is retracted in the reception standby state, for example, the call signal will not be received. can be received well, and its functions as a wireless telephone are not impaired. When stored, the phone becomes smaller and does not get in the way when carried.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a mobile phone according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing main parts of a mobile phone according to an embodiment.

FIG. 3 is a configuration diagram showing main parts of a mobile phone according to an embodiment.

FIG. 4 is a configuration diagram showing main parts of a mobile phone according to another embodiment.

[Explanation of symbols]

1 Mobile phone 2 Main body 2a Step part 4 Antenna 4a Joint part 8 Reflector 12 Feeding point

Claims (1)

[Scope of utility model registration request] [Claim 1] In a mobile phone that makes a call by wireless communication using a wireless telephone line, an antenna for wireless communication can be arranged in at least two states, an upright state and a bent state with respect to the main body of the mobile phone. At the same time,
When the antenna is in an upright state, the antenna is connected to a feeding point via a predetermined matching circuit, and when the antenna is in a bent state, the antenna is directly connected to a feeding point.