JP2007318207A - Telescopic antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescopic antenna capable of being fixedly installed by freely adjusting a directive direction in a desired direction such as a direction easily receiving a radio wave of a broadcast tower. <P>SOLUTION: In the telescopic antenna 1 fitted to a mobile communication terminal and turnable around a shaft, a pair of first projection pieces 35, 35 provided to a lower side of a lower element 32 are arranged to both sides of a second projection piece 22 provided to an upper side of a stopper 21, a plate spring 52 is interposed between the projection pieces 35 and 22, and a rivet 51 is inserted to the projection pieces 35 and 22 and the plate spring 52 to pivotally support the projection pieces 35 and 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a telescopic antenna attached to a mobile communication terminal such as a mobile phone.

  As a telescopic antenna attached to a mobile communication terminal, an antenna element with an antenna top at the upper end and a stopper at the lower end is slidably held by the holder, and the antenna can be moved into and out of the mobile phone casing via the holder A telescopic antenna for attaching and feeding power to the antenna via a holder (see Patent Document 1), a first element having an antenna top at the upper end, a second element having a sleeve at the upper end, and a stopper at the lower end, The sliding elastic piece of one element slides with the coil spring in the sleeve of the second element, and the first element expands and contracts, and the antenna is attached to the housing so that it can protrude and retract through a holder that holds the second element. A telescopic antenna that feeds power to an antenna through a holder is known (see Patent Document 2).

JP 2003-209417 A Japanese Patent Laid-Open No. 7-273519

  By the way, in recent years, expectation for viewing terrestrial digital television broadcasts on mobile communication terminals has increased. Therefore, antennas suitable for viewing terrestrial digital television broadcasts, that is, directed toward a direction in which radio waves from broadcast towers can be easily received. There is an eagerness for an antenna that can be installed in any direction.

  The present invention is proposed in view of the above problems, and an object of the present invention is to provide a telescopic antenna that can be placed by freely adjusting a directivity direction in a desired direction such as a direction in which a radio wave of a broadcast tower is easily received. And

  The telescopic antenna of the present invention is a telescopic antenna that is attached to a mobile communication terminal and is rotatable about an axis, and is provided on a first projecting piece provided on the lower side of the antenna element and on the upper side of the stopper. The second projecting piece is pivotally supported, and a rotational resistance capable of placing the antenna portion above the pivotal support portion at a required angle is provided by the pivotal support.

  In the telescopic antenna of the present invention, the first projecting piece or the second projecting piece is paired, and the pair of first projecting pieces are arranged on both sides of the second projecting piece or the pair of second projecting pieces. The pieces are arranged on both sides of the first projecting piece, an elastic plate is interposed between the first projecting piece and the second projecting piece, and the first projecting piece, the second projecting piece, and the elastic plate, A shaft support member is inserted into the shaft to support the shaft.

  In the telescopic antenna of the present invention, the first projecting piece or the second projecting piece is a pair, and the first projecting piece is slightly smaller in width than the second projecting piece. The second projecting piece is sandwiched between the second projecting pieces, or the first projecting piece is sandwiched between a pair of second projecting pieces whose width between the second projecting pieces is slightly smaller than the width of the first projecting piece. A shaft support member is inserted into and supported by the first projecting piece and the second projecting piece.

  In the telescopic antenna of the present invention, a convex portion that is elastically biased outward is provided at the end of the gap between the first protruding pieces or between the second protruding pieces, and the second protruding piece or The arcuate end surface of the first projecting piece is provided with a recess that can be engaged with the projection at a predetermined interval in a direction along the arc.

  The telescopic antenna of the present invention can be, for example, a one-stage telescopic antenna or a two-stage telescopic antenna. The elastic plate is preferably a leaf spring, for example, but may be another elastic plate member such as rubber. Further, the shaft support member is preferably inexpensive and suitable, for example, as a rivet, but may be configured as a bolt and fastened with a nut. Moreover, the said convex part and a recessed part can be made into a linear protruding item | line and a ditch | groove, or a dotted | punctate convex part and a recessed part, for example. Further, the elastic urging of the convex portion outward is, for example, a configuration in which a plate material having a convex portion is urged from the inside by a coil spring, or a configuration in which the plate material is urged by a coil spring through a sphere. Is possible.

  In addition to the configurations of the inventions and embodiments, the invention of the present application is specified by changing these partial configurations to other configurations, or by adding other configurations to these configurations. Or a superordinate concept in which these partial configurations are deleted and specified to the extent that partial effects can be obtained.

  The telescopic antenna of the present invention is a telescopic antenna that can rotate around a 360 ° axis, for example, by pivotally supporting the first projecting piece on the lower side of the antenna element and the second projecting piece on the upper side of the stopper. Since the pivoting resistance that can be placed at the required angle is provided by the shaft support, the antenna unit can be adjusted by moving the antenna unit to the required angle so that the tip of the antenna unit has a substantially hemispherical trajectory. It can be placed at an adjusted angle. Therefore, it is possible to freely adjust the orientation in a desired direction such as a direction in which it is easy to receive radio waves from the broadcast tower, and for example, to achieve good viewing of digital terrestrial television broadcasting on a mobile communication terminal. Can do.

  Further, a pair of first or second projecting pieces are arranged on both sides of the second or first projecting piece, an elastic plate is interposed between the first projecting piece and the second projecting piece, A structure in which a shaft support member is inserted through the one projecting piece, the second projecting piece, and the elastic plate to support the shaft, or between the first or second projecting pieces rather than the width of the second or first projecting piece A pair of first or second projecting pieces having a slightly smaller width sandwiches the second or first projecting piece, and a shaft support member is inserted into and supported by the first projecting piece and the second projecting piece. According to the configuration, a durable structure can be realized easily at low cost, and the size can be reduced.

  Further, the rotation resistance of the first and second projecting pieces is caused by the engagement between the elastically biased convex portion of the gap between the first and second projecting pieces and the concave portion of the second or first projecting piece. The antenna part adjusted to the required angle can be fixed by both the engagement of the convex part and the concave part, the antenna part can be further stabilized, and the part other than the part where the concave part and the convex part are engaged. Also in this case, frictional resistance is generated by the contact between the convex portion and the protruding piece, and the stability of the antenna portion can be improved.

  An embodiment of a telescopic antenna of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the telescopic antenna 1 of the present embodiment is a two-stage telescopic antenna having a generally round bar shape, and the upper end of the base portion 2 and the upper end of the antenna portion 3 are pivotally supported. 5 is supported by a holder 4 that is supported on the outer periphery of the upper part of the antenna unit 3 or the base unit 2, and is attached to a casing of a mobile communication terminal such as a mobile phone so as to be able to rotate 360 ° around the axis. Power is supplied through 4.

  The base 2 has a substantially cylindrical shape, and a lower portion thereof is a stopper 21 having a diameter larger than that of the central portion, and the antenna 1 extends with respect to the housing by abutting the upper surface of the stopper 21 against the lower end of the holder 4. Is regulated. The upper part of the base part 2 is a substantially semicircular plate-like projecting piece 22 (corresponding to a second projecting piece) that projects upward from the center position of the cylindrical central part. An insertion hole 221 is formed on the upper end surface of the projection piece 22, and a groove-like recess 23 is formed on the upper end surface of the projecting piece 22 so as to be spaced apart along the arc shape. In this example, three points are formed at the apex of the arcuate upper end surface and at positions 90 ° left and right away from the apex, with a pivotal support by a rivet 51 described later as the center. The concave portion 23 has a curved, gentle arc shape that is continuous with the arc-shaped upper end surface, and has a shape corresponding to a streaky convex portion 361 (protruding line) of the leaf spring 36 described later, so that the convex portion 361 can be engaged. It has become.

  The antenna unit 3 includes a substantially cylindrical joint 31 made of resin, a substantially cylindrical lower conductive element 32 provided below the joint 31, and a conductive conductive element provided below the lower element 32. A protruding piece 35 (corresponding to a first protruding piece) formed to protrude downward from the cylindrical portion 321, and an upper element 33 that can be accommodated in the joint 31 and the lower element 32 in a contracted state, extending upward from the joint 31. And a resin antenna top 34 molded with a helical antenna (not shown) which is provided at the upper end of the upper element 33 and is electrically connected to the upper element 33. A cylindrical, spring-like sliding contact piece (not shown) is provided in the joint 31, and the upper element 33 and the lower element 32 are electrically connected to each other in the extended or shortened state through the contact of the sliding contact piece. The lower element 32 is supplied with power from the holder 4 through the central portion of the base 2 and the protruding pieces 22 and 35.

  A pair of projecting pieces 35 are provided on the lower side of the lower element 32 so as to project downward from both side positions of the cylindrical portion 321 in plan view, and each projecting piece 35 has a substantially semicircular plate shape and has a substantially central position. An insertion hole 351 is formed in the. In addition, a substantially square plate-like plate spring 36 is disposed on the end face of the cylindrical portion 321 in the gap between the pair of projecting pieces 35 and 35 so as to be substantially along the end face. A convex portion 361 curved in a line shape is formed, and the convex portion 361 (projection) extends in the thickness direction of the protruding pieces 35 and 22. A receiving portion 39 is formed inside the end surface of the cylindrical portion 321 in the gap, and the coil spring 38 is received in the receiving portion 39, and the lower end of the coil spring 38 is in contact with the recessed back side of the convex portion 361. A sphere 37 is provided. The convex portion 361 and the leaf spring 36 are always elastically biased outward through the sphere 37.

  In the gap between the pair of protruding pieces 35, 35, the protruding piece 22 of the base 2 that is slightly smaller in width than the gap is inserted, and between the outer surface of the protruding piece 22 and the inner surface of the protruding piece 35 at the position. The leaf spring 52 having a substantially donut-shaped bulging portion 521 that protrudes outward in the center is in contact with the inner surface of the protruding piece 35 on the protruding portion 521 side and the outer surface of the protruding piece 22 on the opposite side. It is inserted. A rivet 51 is inserted into the insertion hole 351 of the protruding piece 35, the center hole of the leaf spring 52, and the insertion hole 221 of the protruding piece 22, and the tip of the inserted rivet 51 is crushed to form a pair of protruding pieces 35, 35 and a pair The plate springs 52 and 52 and the protruding piece 22 are pivotally supported.

  In the axial support, the urging force in the axial direction of the rivet 51 is always applied to the protruding pieces 22 and 35 by the elastic force of the leaf spring 52 to generate a frictional resistance, and the inner surface of the protruding piece 35 and the outer surface of the leaf spring 52 are A rotation resistance is always generated between the outer surface of the projecting piece 22 and the inner surface of the leaf spring 52, in other words, between the inner surface of the projecting piece 35 with the leaf spring 52 interposed therebetween and the outer surface of the leaf spring 52. Further, the projecting portion 361 of the leaf spring 36 elastically biased outward slides on the arcuate upper end surface of the projecting piece 22 to generate a sliding resistance, and the antenna portion 3 rotates about the shaft support portion 5. It can rotate approximately 180 ° while resisting resistance and sliding resistance.

  And when the antenna part 3 is rotated and the recessed part 23 formed in the arc-shaped upper end surface of the protrusion piece 22 is arrange | positioned in the position corresponding to the convex part 361, the recessed part 23 which follows the said arc-shaped upper end surface in a curve shape. When the convex portion 361 protrudes by elastic bias and the concave portion 23 and the convex portion 361 are engaged, and further when the antenna portion 3 is rotated, the convex portion 361 is retracted and the concave portion 23 and the convex portion 361 are disengaged, The convex portion 361 again slides on the arcuate upper end surface of the protruding piece 22.

  The telescopic antenna 1 of the above embodiment can rotate around the 360 ° axis, rotate the antenna portion 3 about the shaft support portion 5 by 180 °, and so that the antenna top 34 draws a substantially hemispherical locus. 3 can be adjusted, and the antenna unit 3 rotated to a required angle by the rotation resistance and sliding resistance can be placed. In particular, at a predetermined angle, the antenna portion 3 can be placed with very high stability by the engagement of the concave portion 23 and the convex portion 361.

  As a modification of the shaft support portion 5 of the telescopic antenna 1 of the above embodiment, instead of a configuration in which a leaf spring 52 is interposed between the protruding pieces 35 and 35 and the protruding piece 22, as shown in FIG. A configuration in which the gap between the pair of protruding pieces 35 and 35 is made slightly smaller than the width of the protruding piece 22, the protruding piece 22 is inserted into the gap, and the protruding pieces 22 on both sides are sandwiched by the inserted protruding piece 22. It is good. Other configurations of the modified example are the same as those in the above embodiment.

  Moreover, in the said embodiment, the one protrusion piece 22 by the side of the base 2 is inserted between a pair of protrusion pieces 35 and 35 by the side of the antenna part 3, and the protrusion pieces 35 and 35 are arrange | positioned at the both sides of the protrusion piece 22; However, one projecting piece 35 is provided on the antenna part 3 side and a pair of projecting pieces 22 and 22 are provided on the base 2 side, and the projecting pieces 35 are inserted between the pair of projecting pieces 22 and 22, The protruding pieces 22 and 22 are arranged, and further, a structure corresponding to the accommodating portion 39, the coil spring 37, the spherical body 37, and the convex portion 361 is provided on the base 2 side, and a configuration corresponding to the concave portion 23 is provided on the protruding piece 35. May be.

  The present invention can be used as an antenna of a mobile communication terminal such as a mobile phone.

The front view of the telescopic antenna of embodiment. The enlarged front view which shows the axial support part of the telescopic antenna of FIG. The enlarged plan view which shows the axial support part of the telescopic antenna of FIG. The enlarged plan view which shows the axial support part of a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Telescopic antenna 2 Base 21 Stopper 22 Protruding piece 221 Insertion hole 23 Recess 3 Antenna part 31 Joint 32 Lower element 321 Column 33 Upper element 34 Antenna top 35 Protruding piece 351 Insertion hole 36 Plate spring 361 Protrusion 37 Sphere 38 Coil spring 39 Housing part 4 Holder 5 Shaft support part 51 Rivet 52 Leaf spring 521 Raised part

Claims (4)

A telescopic antenna attached to a mobile communication terminal and rotatable about an axis, wherein a first projecting piece provided below the antenna element and a second projecting piece provided above the stopper A telescopic antenna, characterized in that a pivoting resistance is provided by the shaft support so that the antenna portion above the shaft support portion can be placed at a required angle. The first projecting piece or the second projecting piece is paired, and the pair of first projecting pieces are arranged on both sides of the second projecting piece, or the pair of second projecting pieces are arranged on both sides of the first projecting piece. And an elastic plate is interposed between the first projecting piece and the second projecting piece, and a shaft support member is inserted into the first projecting piece, the second projecting piece, and the elastic plate to support the shaft. The telescopic antenna according to claim 1, wherein: The first projecting piece or the second projecting piece is paired, and the second projecting piece is formed by a pair of first projecting pieces whose width between the first projecting pieces is slightly smaller than the width of the second projecting piece. The first projecting piece and the second projecting piece are sandwiched between a pair of second projecting pieces whose width between the second projecting pieces is slightly smaller than the width of the first projecting piece. The telescopic antenna according to claim 1, wherein the projecting piece is pivotally supported by inserting a pivotal support member. Protrusions that are elastically biased outward are provided at the ends of the gaps between the first protruding pieces or between the second protruding pieces, and the arc-shaped end surfaces of the second protruding pieces or the first protruding pieces are provided. 4. A telescopic antenna according to claim 2, wherein a concave portion that can be engaged with the convex portion is provided at a predetermined interval in a direction along the arc shape.

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