JP2000223915A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to pull out or retract a rod antenna through easy operation by one hand and to realize it with a simple mechanism. SOLUTION: A hollow shaft motor 3 fitted in a housing 2 has a screw groove formed on the inner peripheral surface of its hollow rotary shaft. A rod antenna 8 having a screw groove to be engaged with the afore mentioned screw groove on the outer peripheral surface and further having a guided body 9 at the lower end part is inserted so that its screw groove is engaged with the screw groove of the hollow rotary shaft together, and a sheath 11 containing the guided body 9 is provided below the hollow shaft motor 3 in the housing 2. The sheath 11 and guided body 9 constitute an antenna rotation stop means, which, while stopping the rod antenna 8 from rotating, allows it to move along the length. Consequently, the rod antenna 8 moves up and down as the hollow shaft motor 3 rotates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone in which a rod antenna can be automatically projected out of a housing or retracted into a housing with a simple structure.

[0002]

2. Description of the Related Art In a portable telephone, a rod antenna is
For good reception and transmission, it is preferable to make a long pop-out state. However, the rod antenna that protrudes from the housing during storage or configuration is in the way. Therefore, it is necessary to store the rod antenna in the housing when not in use and in standby. Therefore, the rod antenna is pulled out of the housing only during a call, and this is generally performed manually by a human. Specifically, at the time of use, the user takes the mobile phone with one hand, pulls out the rod antenna with the other hand, and then starts talking. In addition, when the rod antenna is stored in the housing after a call, the rod antenna must be pushed into the housing with the other hand while holding the mobile phone with one hand.

[0003]

Therefore, it has been demanded that the rod antenna be protruded from the housing of the portable telephone by a simple operation or be retracted into the housing of the portable telephone. However, it is difficult to meet the demand, and the actual situation is that the practical use of the mobile phone that meets the demand has not yet been achieved.

[0004] Therefore, for example, one hand may be closed at the time of a sudden incoming call. In such a case, it is necessary to hold the mobile phone with one hand and pull out the rod antenna. The operation is extremely cumbersome. Also, the operation of placing the rod antenna in the housing after the call is troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to make it possible to pull out and store a rod antenna in a mobile phone by a simple operation. It is an object of the present invention to be able to do such a thing without complicating the structure of a mobile phone.

[0006]

According to the portable telephone of the present invention, a hollow shaft motor having a hollow rotating shaft capable of rotating forward and backward is mounted in a housing, and a thread groove is formed on an inner peripheral surface of the hollow rotating shaft.
A rod antenna having a screw groove screwed with the screw groove on the outer peripheral surface is fitted into the hollow rotary shaft in a screwed state, and the rod antenna moves in the axial direction while preventing rotation of the rod antenna in the housing. Characterized in that an antenna rotation preventing means for allowing the rotation of the antenna is provided.

The antenna rotation preventing means includes, for example, a guided member provided below the rod antenna and having a polygonal outer surface, and the guided member provided below the hollow shaft motor of the housing. It can be composed of a sheath that has been made.

Therefore, according to the portable telephone of the present invention, by rotating the hollow rotary shaft of the hollow shaft motor in the forward and reverse directions, the rod antenna in which the screw groove on the inner peripheral surface is screwed with the screw groove on the outer peripheral surface is formed in the longitudinal direction. To make it protrude greatly from the housing, or to be in a state of being largely stored in the housing. This is because there is an antenna rotation preventing means that allows the rod antenna to move in the axial direction while preventing the rotation of the rod antenna, so that the rod antenna can be moved in the longitudinal direction while being prevented from rotating by the means. This is because the hollow rotary shaft rotates in that state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a portable telephone according to the present invention, basically, a hollow shaft motor having a hollow rotating shaft capable of normal and reverse rotation is mounted in a housing, and a thread groove is formed on an inner peripheral surface of the hollow rotating shaft. Then, a rod antenna having a screw groove screwed with the screw groove on the outer peripheral surface is fitted into the hollow rotary shaft in a screwed state, and the axial direction of the rod antenna is prevented while preventing the rod antenna from rotating in the housing. The antenna rotation preventing means for allowing the movement of the antenna is provided. The hollow shaft motor is provided with a through hole in the center of the rotating shaft at the center of the motor and penetrating the shaft in the axial direction.In the present invention, the rotating shaft having a through hole at the center thereof, that is, the hollow rotating shaft is provided. A motor provided with a thread groove on the inner peripheral surface (the inner peripheral surface of the through hole) is used as a hollow shaft motor. The hollow shaft motor may be of any type as long as it can rotate forward and reverse, but it can be said that a type that rotates by direct current is preferable.

Although it is essential that the rod antenna has a thread groove on its outer peripheral surface which is screwed with the thread groove on the inner peripheral surface of the hollow rotary shaft, it must be formed over the entire area from one end to the other end. There is no. It is sufficient that the thread groove is formed in a region having a length equal to the minimum moving stroke of the rod antenna.
Further, as shown in FIG. 4, the rod antenna may have a shape in which the surface is thinly cut at one or several places (12, 12 are cutout portions) when viewed in cross section at the portion where the thread groove is formed. This is because the friction between the hollow rotary shaft and the rod antenna during rotation can be thereby reduced.

By the way, when the rod antenna is pulled out of the housing and stored in the housing, it is necessary to prevent the rotation of the rod antenna. This is the antenna rotation preventing means. It can be easily configured by providing a guided body at the lower end of the rod antenna, and providing a sheath on the housing side that allows the guided body to move up and down while non-rotatably fitting the guided body. Of course, various other modes are conceivable. For example, a groove is provided in the axial direction on the outer peripheral surface of a rod antenna provided with a thread groove, a protrusion is provided on the housing side to fit into the groove, and the rotation of the rod antenna is performed by fitting the protrusion into the groove. The movement can be allowed while preventing it.

The portable telephone is provided with a sensor for detecting when the rod antenna is completely lifted, that is, when it reaches the upper limit point, and when the rod antenna is completely lowered, that is, when it is at the lower limit. When a point is reached, a sensor that detects that point is provided, and when the hollow shaft motor is driven by a switch operation, the sensor thereafter,
When it is detected that the upper or lower limit point has been reached,
It is recommended that the operation of the hollow shaft motor be automatically stopped.

When the rod antenna 8 reaches the upper limit point and the lower limit point, the sensor is not provided when the rod antenna 8 reaches the upper limit point and the lower limit point. It is also possible to detect an increase and automatically stop the operation of the rod antenna at that time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIGS. 1, 2 and 3A and 3B show one embodiment of the mobile phone of the present invention. FIG. 1 is a partially cutaway front view, and FIG. 2 is a rod antenna, a hollow shaft motor and a motor. FIG. 3A is an exploded perspective view showing the attachment, and FIG.
1 (B) is a sectional view taken along line BB of FIG. 1.

In the drawings, reference numeral 1 denotes a portable telephone, 2 denotes a housing, 3 denotes a hollow shaft motor mounted in the housing 2 via a motor mounting tool 4, and 5 denotes a fixing portion thereof, which is formed in an annular shape. Have been. Numeral 6 denotes a hollow rotary shaft rotatably fitted to the annular fixed portion 5 and immovable in the axial direction. The hollow rotary shaft 6 rotates when an electric signal is applied to the hollow shaft motor 3, and rotates when the electric signal is applied to the hollow shaft motor 3. The rotation direction of the hollow rotary shaft 6 changes depending on the polarity.

Reference numeral 7 denotes a center hole of the hollow rotary shaft 6, and a thread groove is formed on the inner peripheral surface of the center hole 7. Reference numeral 8 denotes a rod antenna in which a screw groove to be screwed with the screw groove is engraved on the outer peripheral surface, and a guided body having an outer shape square is fixed to a lower end of the rod antenna. The upper end of the rod antenna 8, which does not appear in the drawing, has a large diameter like the antenna of a normal mobile phone. However, it is not necessary to do so. The length of the region of the rod antenna 8 where the screw groove is formed is such that the rod antenna 8 protrudes from the housing 2,
It is set to be substantially the same as the storage movement stroke in the operation of storage in the storage.

The mounting fixture 4 for mounting the hollow shaft motor 3 includes:
The upper portion is formed in a cylindrical shape having a large inner diameter and an outer diameter, the lower portion is formed in a cylindrical shape having a small inner diameter and an outer diameter, and a screw (male) groove is formed in the outer peripheral surface of the lower portion. Then, insert the screw groove into the housing 2
The motor attachment 4 is attached to the housing 2 by being screwed into the internal attachment screw groove 19. Then, the hollow shaft motor 3 is fitted into the upper cylindrical portion of the motor mount 4 so that the hollow shaft motor 3 is
It can be attached to. 10, 10, 1
Numerals 0 and 10 denote cutouts formed at the upper end of the motor mount 4 so that coins or drivers can be fitted into the cutouts and the motor mount 4 can be screwed in or unscrewed.

Reference numeral 11 denotes a sheath provided below the portion to which the hollow shaft motor 3 is attached. The sheath has a square inner cross section so that the guided body 9 can be guided while preventing its rotation. It is formed in a suitable size.

The portable telephone is provided with a sensor (not shown) for detecting when the rod antenna 8 is completely lifted, that is, when it reaches the upper limit point, and when the rod antenna 8 is completely lowered. That is, a sensor (not shown) for detecting the lower limit point is provided when the lower limit point is reached, and when the hollow shaft motor is driven by a switch operation, the sensor detects that the upper limit value or the lower limit value has been reached. At this time, the operation of the hollow shaft motor 3 is automatically stopped.

In this mobile phone, in a normal state (when not in use or in a standby state), the rod antenna 8 is housed in the housing 2 as shown in FIG. And when you try to start sending at the time of an incoming call or voluntarily,
Push an antenna lift switch (not shown). Then, the hollow rotary shaft 6 of the hollow shaft motor 3 rotates in the forward direction. Then, the rod antenna 8 is moved upward by the hollow rotary shaft 6 rotating in the forward direction while being prevented from rotating by the sheath 11 at the guided body 9 at the lower end thereof. When the hollow rotary shaft 6 has completely moved up to the upper limit point, the hollow shaft motor 3 is automatically stopped by detecting the arrival at the upper limit point by the sensor. The hollow shaft motor 3 for driving the rod antenna 8 is stopped in a state where it protrudes most from the housing 2.

Communication is performed in this state. When the communication is completed, the antenna lift switch is pushed again.
Then, the hollow shaft motor 3 rotates in the reverse direction, and as a result,
The rod antenna 8 is moved downward. And
When the hollow rotary shaft 6 is completely lowered to the lower limit point, the hollow shaft motor 3 is automatically stopped by detecting the arrival at the lower limit point by the sensor. Accordingly, the hollow shaft motor 3 is stopped in a state where the rod antenna 8 is most housed in the housing 2, that is, in a contracted state.

According to such a portable telephone, the rod antenna 8 can be moved up and down only by operating the antenna up / down switch. Therefore, the operation of pulling out and storing the rod antenna 8 becomes extremely simple, and the pulling out and storing of the rod antenna 8 can be performed with one hand.

The lifting mechanism of the rod antenna 8 is
A screw groove is formed in the center hole 7 of the hollow rotary shaft 6 of the hollow shaft motor 3, a screw groove is formed on the outer peripheral surface as a rod antenna 8, and a guided body 9 is formed at a lower end portion. A housing is provided, a sheath 11 is provided inside the housing 2 on the side of the hollow shaft motor 3, and the rod antenna 8 is fitted to the hollow rotary shaft 6 in a state where these screw grooves are screwed together. This makes it very easy to construct
It is not necessary to attach a pulley to the rotating shaft of the motor or hang a belt over the pulley to transmit the power of the motor to the rod antenna. Therefore, there is no possibility that a trouble such as the belt coming off and causing a failure will occur.

FIG. 4 is a perspective view showing a modified example 8a of the rod antenna of the portable telephone according to the present invention. This rod antenna 8
“a” is obtained by thinly cutting the outer peripheral portion where the thread groove is formed so as to reduce the friction between the hollow rotary shaft and the rod antenna during rotation. Reference numerals 12 and 12 denote the notched portions.

When the rod antenna 8 reaches the upper limit point and the lower limit point, it does not provide a sensor for detecting the upper limit point and the lower limit point. The increase may be detected, and the operation of the hollow shaft motor 3 may be automatically stopped based on the detection.

[0026]

According to the portable telephone of the present invention, by rotating the hollow rotary shaft of the hollow shaft motor in the forward and reverse directions, the rod antenna in which the screw groove on the outer peripheral surface is screwed into the screw groove on the inner peripheral surface thereof is provided in the longitudinal direction. To make it protrude greatly from the housing, or to be in a state of being largely stored in the housing.

For raising and lowering the rod antenna, a hollow groove having a screw groove formed in the center hole of the hollow rotary shaft of the hollow shaft motor, and a screw groove formed on the outer peripheral surface thereof to be screwed with the screw groove is prepared. A very simple method in which a rod antenna is fitted to a hollow rotary shaft with these screw grooves screwed together, and further provided with an antenna rotation preventing means for allowing the rod antenna to move in the longitudinal direction while preventing rotation of the rod antenna. Can be done by mechanism. In order to transmit the power of the motor to the rod antenna, it is not necessary to attach a pulley to the rotating shaft of the motor or hang a belt on the pulley. Therefore, there is no possibility that a trouble such as the belt coming off and causing a failure will occur.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of one embodiment of the mobile phone of the present invention.

FIG. 2 is an exploded perspective view showing a rod antenna, a hollow shaft motor, and a hollow shaft motor mounting portion of the embodiment of the mobile phone of the present invention.

3A is a sectional view taken along line AA of FIG. 1, and FIG. 3B is a sectional view taken along line BB of FIG.

FIG. 4 is a perspective view showing a modification of the rod antenna of the mobile phone of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cellular phone, 2 ... Case, 3 ... Hollow shaft motor, 6 ... Hollow rotating shaft, 7 ... Center hole with thread groove formed, 8 ... Rod antenna, 9: guided body, 11: sheath, 9, 11: antenna rotation preventing means.

Claims (2)

[Claims] 1. A hollow shaft motor having a hollow rotating shaft capable of normal and reverse rotation is mounted in a housing, a screw groove is formed on an inner peripheral surface of the hollow rotating shaft, and the screw groove and the screw are formed on the hollow rotating shaft. A rod antenna having a screw groove to be fitted on the outer peripheral surface is fitted in a state where the screw groove and the screw groove of the hollow rotary shaft are screwed together, and the axial movement of the rod antenna is prevented while preventing the rod antenna from rotating in the housing. A state in which the rod antenna is vertically moved by rotating the hollow rotation shaft of the hollow shaft motor in the normal and reverse directions so as to protrude largely from the housing or is largely housed in the housing. A mobile phone characterized in that it is used for 2. A hollow shaft motor having a hollow rotating shaft capable of rotating forward and backward is mounted in a housing, a screw groove is formed on an inner peripheral surface of the hollow rotating shaft, and the screw groove and the screw are formed on the hollow rotating shaft. A rod antenna having a thread groove to be fitted on its outer peripheral surface and further provided with a guided body having a polygonal cross section at the lower end is fitted and inserted in a state where the thread groove and the thread groove of the hollow rotary shaft are screwed together. The inside of the body below the hollow shaft motor is provided with an inner polygonal sheath in which the guided body is fitted and guided in a state where the guided body is prevented from rotating, and the hollow rotary shaft of the hollow shaft motor is reversed. A mobile phone characterized in that the rod antenna is moved up and down by rotating the rod antenna so as to protrude largely from the housing or to be largely housed in the housing.