JP2009188716A - Multi-stage accommodation type rod antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-stage accommodation type rod antenna facilitating the adjustment of a sliding force at a sliding plate section. <P>SOLUTION: A first sliding spring 18 is formed in a semi-cylindrical shape by a metallic plate member in the multi-stage accommodation type rod antenna; one end becomes a stopper section 27; a cutout is provided at a position with a prescribed depth from the stopper section to form a sliding plate section 28 in a tongue shape; a free end of the sliding plate section is bent toward the outside to have spring properties; and at least one part of the metallic member is recessed toward the inside for providing a holding section 31 engaged with an engagement hole 37 of a first extension fixture. A second sliding spring is formed in the semi-cylindrical shape having a curvature larger than that of the first sliding spring by a metallic plate member; one end becomes a stopper section; a cutout is provided at a position with a prescribed depth from the stopper section to form a sliding plate section in a tongue shape; a free end of the sliding plate section includes spring properties; and at least one part of the metallic member is recessed toward the inside for providing a holding section engaged with the engagement hole of a second extension fixture. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a multistage stowable rod antenna, and more particularly, a multistage stowable rod antenna can be easily set to a desired sliding force value by devising a sliding spring with respect to the sliding force at the time of housing and at the time of housing. The present invention relates to a retractable rod antenna.

  Conventionally, as shown in FIG. 7, a multistage retractable antenna employed in a mobile phone or the like has a rod antenna element 15 formed of a resin pipe 14 having a sleeve 12 with a cap 12 and a wire 13 accommodated therein. A connecting bracket 17 that is a long rod (metal pipe) formed of a metallic member that is supported in an extendable manner by interposing an internal contact spring 16 at a lower connecting portion of the rod antenna element 15; A first extension fitting 19, which is a long rod (metal pipe) formed of a metallic member that supports the first sliding spring 18 </ b> A via a connecting portion on the lower side of the connection fitting 17 so as to expand and contract. And a long rod (metal pipe) formed by a metallic member that supports the second sliding spring 21A through a connecting portion on the lower side of the first extension fitting 19 so as to extend and contract. A second decompression fitting 22 is comprised of a holder 23 for mounting the base side of the second extension fitting 22.

As shown in FIGS. 6, 7, and 9, the connection fitting 17 is formed in a cavity through which the resin pipe 14 is inserted by a long rod-shaped rod (metal pipe), and the first sliding member is closer to one end. Two engaging holes 37 that engage with the holding portion 31a of the spring 18A are provided at opposing positions, and the other end portion has a contact portion 20 (see FIG. 6) formed in a tapered shape.
As shown in FIGS. 7, 9 and 10, the first extension fitting 19 is formed in a cavity through which the connection fitting 17 is inserted by a rod-like long rod (metal pipe), and is closer to one end. Two engaging holes 38 that engage with the holding portions 36a of the sliding spring 21A are provided at opposing positions, and the other end portion has a contact portion 30 (see FIG. 9) formed in a tapered shape.
As shown in FIGS. 7 and 10, the second extension fitting 22 is formed in a cavity through which the first extension fitting 19 is inserted by a rod-like long rod (metal pipe), and a holder 23 near one end. An engagement hole (not shown) that engages with the contact portion 40 is provided, and the other end portion has a tapered shape (see FIG. 10).

  As shown in FIG. 6, the internal contact spring 16 is for engaging and locking the resin pipe 14 to the connection fitting 17 in an extendable manner. An internal stopper member 24 is attached to the lower side of the resin pipe 14, and the internal stopper member By attaching the contact spring 25 to 24, the contact spring 25 abuts on the inner peripheral surface of the connection fitting 17 so that the contact spring 25 can be stretched and moved with a certain degree of moderation.

  As shown in FIGS. 8 and 9, the first sliding spring 18 </ b> A is formed of two pieces having the same shape of a split shape, and the metallic plate member is a semi-cylindrical shape so as to fit the outer peripheral surface of the connection fitting 17. It is formed in a shape, and has one end portion that is a stopper portion 27a, and a sliding portion 28a that slides in contact with the inner peripheral surface of the first extension fitting 19 with a slight swelling at a substantially central position on the surface. The holding portion 31 a that is recessed inward toward the end opposite to the stopper portion 27 a and that engages with the engagement hole 37 of the connection fitting 17 is provided.

  As shown in FIG. 10, the second sliding spring 21A has the same shape as the first sliding spring 18A and a large size, and a semi-cylindrical shape having a larger curvature than the first sliding spring 18A. Is formed of two pieces having the same shape, a metallic member is formed in a semi-cylindrical shape so as to fit the outer peripheral surface of the first extension fitting 19, and one end portion is a stopper portion 33a. Provided with a sliding portion 34a that slides in contact with the inner peripheral surface of the second extension fitting 22 with a slight bulge at a substantially central position on the surface, and is recessed inward toward the end opposite to the stopper portion 33a. In addition, the holding portion 36 a that engages with the engagement hole 38 of the first extension fitting 19 is provided.

The first sliding spring 18A and the second sliding spring 21A having the above-described configuration are the first sliding spring 18A composed of two pieces, and the engagement hole of the connection fitting 17 having a long cylindrical shape. Assembling is completed by inserting the connection fitting 17 with the first sliding spring 18 </ b> A attached from the rear side of the first extension fitting 19.
Similarly, the second sliding spring 21A is a two-piece second sliding spring 21A, which is attached to the engagement hole 38 of the first elongated fitting 19 having a long cylindrical shape by aligning the holding portion 36a. The assembly is completed by inserting the first extension fitting 19 with the second sliding spring 21 </ b> A attached from the rear side of the second extension fitting 22.

  In this way, as shown in FIG. 6, the resin pipe 14 inserted into the connection fitting 17 has the internal stopper member 24 in contact with the tapered contact portion 20 provided at the end of the connection fitting 17. As shown in FIG. 9, the connection fitting 17 inserted into the first extension fitting 19 is constricted at the end of the first extension fitting 19, as shown in FIG. Since the stopper portion 31a of the first sliding spring 18A abuts on the abutting portion 30 having a shape, further elongation is suppressed, and similarly inserted into the second extension fitting 22 as shown in FIG. In addition, the first extension fitting 19 is further increased by the stopper portion 33a of the second sliding spring 21A coming into contact with the tapered contact portion 40 provided at the end of the second extension fitting 22. The growth of is suppressed.

JP 2003-37408 A

  However, the split springs described in the prior art are inconvenient because the range of the sliding part that contacts and slides against the inner peripheral surface of the metal fitting is formed integrally with the stopper part and the holding part. There is a problem that it is difficult to adjust the sliding condition because it is clear and it is not clear how far the spring is.

  Therefore, in a stretchable metal fitting that uses a split spring having a split shape, there is a problem that must be solved with a contact structure that allows the sliding condition to be adjusted in advance.

  In order to solve the above problems, the multistage stowable rod antenna of the present invention has the following configuration.

(1) A multistage retractable rod antenna is constructed by sliding a plurality of long rods with different diameters so that they can be expanded and contracted in the axial direction. It is a multistage retractable rod antenna that is inserted in the outer periphery of the cylinder so as to be opposed to each other and supported so as to be stretchable. One end portion is a stopper portion, and includes a sliding plate portion formed in a tongue shape by notching a predetermined depth from the stopper portion, and the free end portion side of the sliding plate portion is provided. A holding portion is provided that engages with the engagement hole of the extension fitting by warping outward and providing springiness, and by denting at least one portion of the metallic member inward.

(2) A multistage stowable rod antenna is a rod antenna element formed of a long resin pipe that houses a wire, and a connecting metal fitting that is extendably supported by interposing an internal contact spring below the rod antenna element. And a first extension fitting that supports the second outer periphery of the connecting metal fitting so as to be stretchable by sandwiching the two first split springs on the outer periphery of the cylinder so as to face each other. And a second extension fitting that supports the second outer periphery of the extension metal fitting so as to be stretchable by sandwiching the two second-shaped sliding springs on the outer periphery of the cylinder so as to face each other. In the multistage retractable rod antenna, the first sliding spring is formed of a metal plate member in a semi-cylindrical shape, and one end portion serves as a stopper portion, and a notch is formed at a predetermined depth from the stopper portion. Put in tongue shape A sliding plate portion formed, the free end portion of the sliding plate portion is warped outwardly to have a spring property, and at least one portion of the metallic member is recessed inwardly to form the first. A holding portion that engages with the engagement hole of the one extension fitting;
The second sliding spring is a metal plate member that is formed in a semi-cylindrical shape having a larger curvature than the first sliding spring, and has one end portion serving as a stopper portion at a predetermined depth from the stopper portion. A sliding plate portion formed by forming a notch into a notch is provided, and the free end portion of the sliding plate portion is warped outwardly to have a spring property, and at least one portion of the metallic member is provided. A holding portion that engages with the engagement hole of the second extension fitting is provided by being recessed inward.

  According to the present proposal, the sliding portion for contacting the inner peripheral surface of the metal fitting of the sliding spring is provided with a spring property to form the sliding plate portion, and independent from the stopper portion and the holding portion, Adjustment of the sliding force of the sliding plate portion is facilitated.

  Next, an embodiment of a multistage retractable rod antenna according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the multistage retractable rod antenna of the present invention has a structure that can be extended in three stages, and is formed of a resin pipe 14 that includes a cap 12 on a sleeve 11 and a wire 13 inside. Rod antenna element 15 and a long rod (metal pipe) formed of a metallic member that is supported by an internal contact spring 16 at a connecting portion on the lower side of the rod antenna element 15 so as to expand and contract. A connecting rod 17 and a long rod (metal pipe) formed of a metallic member that supports the first sliding spring 18 in a stretchable manner at a connecting portion on the lower side of the connecting bracket 17. A long extension formed by a certain first extension fitting 19 and a metallic member that supports the first extension fitting 19 below the first extension fitting 19 via a second sliding spring 21 so as to be stretchable. Lo A second decompression fitting 22 is (metal pipe), a holder 23 for attachment to the base side of the second extension fitting 22.

As shown in FIGS. 1, 3, and 4, the connection fitting 17 is formed in a cavity through which the resin pipe 14 is inserted with a long rod-shaped rod (metal pipe), and the first sliding is close to one end. Two engagement holes 37 that engage with the holding portion 31 of the spring 18 are provided at opposing positions, and the other end portion has a contact portion 20 (see FIG. 6) formed in a tapered shape.
As shown in FIGS. 1, 3, 4, and 5, the first extension fitting 19 is formed in a cavity through which the connection fitting 17 is inserted by a long rod-shaped rod (metal pipe), and is closer to one end. Two contact holes 30 (see FIG. 5) for engaging with the holding portion 36 of the second sliding spring 21 are provided at opposing positions, and the other end portion is formed in a tapered shape. 4).
As shown in FIGS. 1 and 5, the second extension fitting 22 is formed in a cavity through which the first extension fitting 19 is inserted by a rod-like long rod (metal pipe), and a holder 23 near one end. An engagement hole (not shown) that engages with the contact portion 40 is provided, and a contact portion 40 (see FIG. 5) is formed with the other end portion tapered.

  As shown in FIG. 6, the internal contact spring 16 is for engaging and locking the resin pipe 14 to the connection fitting 17 in an extendable manner. An internal stopper member 24 is attached to the lower side of the resin pipe 14, and the internal stopper member By attaching the contact spring 25 to 24, the contact spring 25 abuts on the inner peripheral surface of the connection fitting 17 so that the contact spring 25 can be stretched and moved with a certain degree of moderation.

As shown in FIGS. 2 and 3, the first sliding spring 18 is formed of two pieces having the same shape of a halved shape, and the metallic plate member is a semi-cylindrical shape so as to fit the outer peripheral surface of the connection fitting 17. The tongue portion is formed in a shape, and one end portion is a stopper portion 27, and a notch is formed by leaving a part on the three sides in the longitudinal direction and the lateral direction at a depth position from the stopper portion 27, and leaving a part. The sliding plate portion 28 is provided with a spring property by slightly bending and bending the free end portion side outward. The free end portion of the sliding plate portion 28 is configured to have a tapered surface 29 formed into a tapered shape by chamfering. The sliding plate portion 28 slides with the tapered surface 29 in contact with the inner peripheral surface of the first extension fitting 19.
In addition, a holding portion 31 that is a tab formed by surface punching inward is provided on an extension line of the sliding plate portion 28, and is configured to engage with an engagement hole 37 of the connection fitting 17.
The first sliding spring 18 having such a structure is sandwiched between the two split-shaped first sliding springs 18 at the lower side of the connection fitting 17 so as to face each other on the outer periphery of the cylinder of the connection fitting 17. To intervene.

As shown in FIG. 5, the second sliding spring 21 is formed in the same halved shape as the first sliding spring 18 and has a large size, and has a larger curvature than the first sliding spring 18. The metal plate member is formed in a semi-cylindrical shape so as to fit the outer peripheral surface of the first extension fitting 19, and one end portion is a stopper portion 33, and this stopper portion is formed of two pieces formed in a cylindrical shape. 33, with a part left on the three sides in the vertical and horizontal directions at a position deeper than 33, with a notch, and the free end side of the part of the tongue that has left a part is bent slightly outward and bent to have springiness A sliding plate portion 34 is provided. The free end portion of the sliding plate portion 34 is configured to have a tapered surface 35 formed into a tapered shape by chamfering. The sliding plate portion 34 slides with the tapered surface 35 in contact with the inner peripheral surface of the second extension fitting 22.
In addition, a holding portion 36 that is a tab formed by surface punching inward is provided on an extension line of the sliding plate portion 34, and engages with the engagement hole 38 of the first extension fitting 19.
The second sliding spring 21 having such a structure is provided on the lower side of the first extension fitting 19 so that the two second-shaped sliding springs 21 are arranged on the outer circumference of the cylinder of the first extension fitting 19. They are sandwiched so as to be opposed to each other.

The first sliding spring 18 and the second sliding spring 21 having the above-described configuration are the first sliding spring 18 having two pieces, and the engagement hole of the connection fitting 17 having a long cylindrical shape. Assembling is completed by inserting the connecting bracket 17 with the first sliding spring 18 attached from the rear side of the first extension fitting 19.
Similarly, the second sliding spring 21 has a two-piece second sliding spring 21 in which the holding portion 36 is aligned with the engagement hole 38 on the outer periphery of the first elongated metal fitting 19 having a long cylindrical shape. The assembly is completed by inserting the first extension fitting 19 with the second sliding springs 21 attached thereto from the rear side of the second extension fitting 22.

  In this way, as shown in FIG. 6, the resin pipe 14 inserted into the connection fitting 17 has the internal stopper member 24 in contact with the tapered contact portion 20 provided at the end of the connection fitting 17. As shown in FIG. 4, the connection fitting 17 inserted into the first extension fitting 19 is constricted at the end of the first extension fitting 19, as shown in FIG. Since the stopper portion 31 of the first sliding spring 18 abuts on the abutting portion 30 having a shape, further elongation is suppressed, and similarly, as shown in FIG. 10, it is inserted into the second extension fitting 22. Further, the first extension fitting 19 is further increased by the stopper portion 33 of the second sliding spring 21 coming into contact with the tapered contact portion 40 provided at the end of the second extension fitting 22. The growth of is suppressed.

  The sliding portion for contacting the inner peripheral surface of the metal fitting of the sliding spring is provided with a spring property to form a sliding plate portion, and is independent of the stopper portion and the holding portion, thereby sliding the sliding plate portion. Provided is a multistage retractable rod antenna that facilitates power adjustment.

It is the perspective view which showed schematically the multistage stowable rod antenna which concerns on this invention. It is a perspective view of a sliding spring. It is a perspective view which shows a mode that the sliding spring was attached to the metal fitting same as the above. It is sectional drawing which expanded and showed the 1st sliding spring attached to the connection metal fitting. It is sectional drawing which expanded and showed the 2nd sliding spring attached to the 1st expansion | extension metal fitting similarly. It is sectional drawing which expanded and showed the internal contact spring attached to the rod antenna element. It is the perspective view which showed schematically the multistage accommodation type rod antenna in a prior art. It is a perspective view of a sliding spring. It is sectional drawing which expanded and showed the 1st sliding spring attached to the connection metal fitting similarly. It is sectional drawing which expanded and showed the 2nd sliding spring attached to the 1st expansion | extension metal fitting similarly.

Explanation of symbols

11 Sleeve 12 Cap 13 Wire 14 Resin pipe 15 Rod antenna element 16 Internal contact spring 17 Connection fitting 18 First sliding spring 19 First extension fitting 20 Abutting portion 21 Second sliding spring 22 Second extension fitting 23 Holder 24 Internal stopper member 25 Contact spring 27 Stopper portion 28 Sliding plate portion 29 Tapered surface 30 Abutting portion 31 Holding portion 33 Stopper portion 34 Sliding plate portion 35 Tapered surface 36 Holding portion 37 Engaging hole 38 Engaging hole 40 Contact part

Claims (2)

A plurality of long rods having different diameters are slid and connected to each other so as to be able to expand and contract in the axial direction. The connecting portion of the rods has two split springs facing each other on the outer periphery of the cylinder. A multistage retractable rod antenna that is sandwiched and supported so as to be extendable and retractable,
The sliding spring is formed of a metal plate member in a semi-cylindrical shape, and one end thereof serves as a stopper portion, and a sliding portion is formed by forming a notch at a predetermined depth from the stopper portion. A plate portion, the free end portion of the sliding plate portion is warped outwardly to have a spring property, and at least one portion of the metallic member is recessed inwardly to engage the engagement hole of the extension fitting A multistage retractable rod antenna, characterized in that a holding portion is provided for engaging with the rod antenna. A rod antenna element formed of a long resin pipe containing a wire;
A connecting bracket that supports an elastic contact by interposing an internal contact spring on the lower side of the rod antenna element;
A first extension fitting that supports the second outer periphery of the connecting metal fitting so as to be stretchable by sandwiching the two first split springs on the outer periphery of the cylinder so as to face each other;
A second extension fitting that supports the second extension spring in a telescopic manner by sandwiching and interposing two second split springs in a split shape on the outer periphery of the cylinder so as to face each other on the lower side of the first extension fitting;
A multistage retractable rod antenna with
The first sliding spring is formed of a metal plate member in a semi-cylindrical shape, and one end portion is a stopper portion, and a notch is formed at a predetermined depth from the stopper portion to form a tongue piece shape. The sliding plate portion is provided with a spring property by warping the free end portion of the sliding plate portion in the outward direction, and at least one portion of the metallic member is recessed in the inward direction. A holding portion that engages with the engagement hole of the metal fitting is provided,
The second sliding spring is a metal plate member that is formed in a semi-cylindrical shape having a larger curvature than the first sliding spring, and has one end portion serving as a stopper portion at a predetermined depth from the stopper portion. A sliding plate portion formed by forming a notch into a notch is provided, and the free end portion of the sliding plate portion is warped outwardly to have a spring property, and at least one portion of the metallic member is provided. A multistage retractable rod antenna, characterized in that a holding portion that engages with an engagement hole of the second extension fitting is provided by being recessed inward.

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