JP2009188873A - 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 by forming a sliding plate while giving spring properties to a slide section coming into contact with the inner-periphery surface of a fixture in a sliding spring, and by enabling the sliding plate to stand alone from stopper and holding sections. <P>SOLUTION: The multi-stage accommodation type rod antenna includes: a rod antenna element; a connection fixture for flexible supporting by an internal contact spring at a lower side of the rod antenna element; and an extension fixture for flexible supporting by a cylindrical sliding spring at a lower side of the connection fixture. The sliding spring is formed cylindrically by a metallic plate member, includes a slit in a vertical direction, sets one edge to be a stopper section, and includes a sliding plate section formed in a tongue shape by forming notches in three sides from the stopper section while one portion remains from a position of prescribed depth. <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 attachment to 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 is close to one end. Two engagement holes 37 that engage with the holding portion 31a of the spring 18A are provided at opposite positions (see FIG. 9), and the other end portion has a contact portion 20 formed in a tapered shape (see FIG. 6). .
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 with a long rod-shaped rod (metal pipe), and is positioned near one end. Two engaging holes 38 that engage with the holding portion 36a of the sliding spring 21A are provided at opposite positions (see FIG. 10), and the other end portion has a contact portion 30 formed in a tapered shape (see FIG. 10). 9).
As shown in FIGS. 7 and 10, the second extension fitting 22 is formed in a cavity through which the first extension fitting 17 is inserted with a rod-shaped metal pipe, and engages with the holder 23 near one end. A hole (not shown) is provided (see FIG. 7), and the other end portion has a contact portion 40 formed in 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 and larger size as the first sliding spring 18A, is formed of two pieces having the same shape, and the first extension. A metal plate member is formed in a semi-cylindrical shape so as to fit the outer peripheral surface of the metal fitting 19, and one end portion is a stopper portion 33 a, and the second extension metal fitting 22 is provided with a slight bulge at a substantially central position on the surface. A sliding portion 34a that slides in contact with the inner peripheral surface is provided, and is held inwardly toward the end opposite to the stopper portion 31a so as to engage with the engagement hole 38 of the first extension fitting 19. The structure is provided with a portion 36a.

The first sliding spring 18A and the second sliding spring 21A having the above-described configuration are such that the first sliding spring 18A composed of two pieces is the engagement of the outer periphery of the connecting member 17 having a long cylindrical shape. The assembly is completed by inserting the connection fitting 17 in a state where the holding portions 31a are respectively fitted to the fitting holes 37 and the first sliding spring 18A is attached from the rear side of the first extension fitting 19.
Similarly, in the second sliding spring 21A, the two-piece second sliding spring 21A has the holding portion 36a aligned with the engagement hole 38 on the outer periphery of the first cylindrical extension 19 having a long cylindrical shape. The assembly is completed by inserting the first extension fitting 19 with the second sliding spring 21 </ b> A 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. 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 27a of the first sliding spring 18A abuts on the abutting portion 30 having the shape, further elongation is suppressed, and similarly, as shown in FIG. 10, it is inserted into the second extension fitting 22. 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 sliding spring described in the prior art is unclear because the range of the sliding part that slides in contact with the inner peripheral surface of the metal fitting is formed integrally with the stopper part and the holding part. Since it is not clear whether is a spring, there is a problem that it is difficult to adjust the sliding condition.

  Therefore, in the extendable metal fitting using a sliding spring, there is a problem that must be solved in 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 having different diameters so that they can be expanded and contracted in the axial direction, and the connecting portion of the rods is a cylindrical sliding spring. A multi-stage retractable rod antenna that is supported so as to be extendable and contractable with a metal plate member, the sliding spring being formed in a cylindrical shape with a slit in a direction substantially perpendicular to the diameter direction, One end is a stopper part, and a sliding plate part is formed in the shape of a tongue piece with a notch formed at a predetermined depth from the stopper part. The free end side of the sliding plate part is directed outward. The holding part which engages with the engagement hole of the rod is provided by providing a spring property by warping and recessing at least one portion of the metallic member inward. Tenna.

(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. A first extension fitting that is supported in a telescopic manner via a first sliding spring below the connection fitting, and a second sliding spring interposed below the first extension fitting. And a second extension fitting that is extendably supported to extend and retract, wherein the first sliding spring is formed of a metal plate member in a cylindrical shape and is substantially perpendicular to the diameter direction. A slit is provided in one direction, and one end becomes a stopper part, and a sliding plate part is formed by forming a notch at a position of a predetermined depth from the stopper part. Warps the free end side outward Provided with a spring property and provided with a holding portion that engages with the engagement hole of the first extension fitting by recessing at least one portion of the metallic member in the inner direction, the second sliding spring is: Formed in a cylindrical shape with a metal plate member, provided with slits in a direction substantially perpendicular to the diameter direction, one end becomes a stopper part, and a notch is formed at a predetermined depth from this stopper part 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. And a holding portion that engages with the engagement hole of the second extension fitting.

  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, 4, and 6, 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 is close to one end. Two engagement holes 37 (see FIG. 4) for engaging 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 and 4, 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). Two engaging holes 38 that engage with the holding portion 36 of the sliding spring 21 are provided at opposing positions, and the other end portion has a contact portion 30 formed in a tapered shape.
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 with a rod-shaped metal pipe, and engages with the holder 23 near one end. A hole (not shown) is provided, and the other end portion has a contact portion 40 formed in a tapered shape.

  As shown in FIGS. 1 and 6, the internal contact spring 16 engages and locks the resin pipe 14 to the connection fitting 17 in an extendable manner, and an internal stopper member 24 is attached to the lower side of the resin pipe 14. By attaching the contact spring 25 to the internal stopper member 24, the contact spring 25 abuts on the inner peripheral surface of the connection fitting 17 so that the contact spring 25 can move in a stretchable manner with a certain degree of moderation.

As shown in FIGS. 1, 2, 3 and 4, the first sliding spring 18 is a metallic cylindrical body formed in a cylindrical shape so as to fit the outer peripheral surface of the connection fitting 17, and in the diametrical direction. The slit 26 is inserted in a substantially vertical direction, the end is a stopper portion 27, and a part is left on the three sides in the vertical and horizontal directions from the position of a predetermined depth from the stopper portion 27 at a symmetrical position across the slit 26. The sliding plate portion 28 is provided with a spring property by making a notch and slightly bending and bending the free end portion side of the tongue piece leaving a part thereof 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.

As shown in FIGS. 1 and 5, the second sliding spring 21 has the same shape and large size as the first sliding spring 18, and fits the outer peripheral surface of the first extension fitting 19. In this way, the cylindrical body is formed in a cylindrical shape, and a slit 32 is inserted in a direction substantially perpendicular to the diameter direction, the end is a stopper portion 33, and a predetermined depth from the stopper portion 33 at a symmetrical position across the slit 32. Sliding part with notches on the three sides in the vertical and horizontal directions from the position, and bending the free end part of the tongue piece, which has left part, slightly bent outward and warped. A moving 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.

In the first sliding spring 18 and the second sliding spring 21 having such a configuration, first, the first sliding spring 18 is held in the engagement hole 37 of the connecting member 17 having a long cylindrical shape. 31 is attached together, and the assembly is completed by inserting the connection fitting 17 with the first sliding spring 18 attached from the rear side of the first extension fitting 19.
Similarly, the second sliding spring 21 is attached to the holding hole 36 in the engagement hole 38 of the first elongated fitting 19 having a long cylindrical shape, and the second sliding spring 21 is attached. The assembly is completed by inserting the first extension fitting 19 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. When the stopper portion 31 of the first sliding spring 18 abuts on the abutting portion 30 having a shape, the further elongation is suppressed, and similarly, as shown in FIG. 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 26 Slit 27 Stopper portion 28 Sliding plate portion 29 Tapered surface 30 Abutting portion 31 Holding portion 32 Slit 33 Stopper portion 34 Sliding plate portion 35 Tapered surface 36 Holding portion 37 Engagement hole 38 Engagement hole 40 contact part

Claims (2)

A plurality of long rods with different diameters are slid and connected to each other so as to be able to expand and contract in the axial direction, and the connecting portion of the rods is supported so as to be extendable through a cylindrical sliding spring. A multistage retractable rod antenna
The sliding spring is formed of a metal plate member in a cylindrical shape, and is provided with a slit in a direction substantially perpendicular to the diametrical direction, with one end serving as a stopper, and a notch is provided at a predetermined depth from the stopper. A sliding plate portion formed in a tongue-like shape, and the free end portion side of the sliding plate portion is warped outwardly to have a spring property, and at least one portion of the metallic member is directed inwardly. A multistage retractable rod antenna, characterized in that a holding portion is provided that engages with an engagement hole of the rod by being recessed. 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 is supported in a retractable manner by interposing a first sliding spring on the lower side of the connection fitting;
A second extension fitting that supports the second extension fitting with a second sliding spring 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 cylindrical shape, and is provided with a slit in a direction substantially perpendicular to the diameter direction. A sliding plate portion formed in the shape of a tongue piece with a notch, the free end portion of the sliding plate portion being warped outwardly to have a spring property, and at least one portion of the metallic member is provided By providing a holding portion that engages with the engagement hole of the first extension fitting by being recessed inward,
The second sliding spring is formed of a metal plate member in a cylindrical shape, and is provided with a slit in a direction substantially perpendicular to the diametrical direction, with one end serving as a stopper, and is cut from the stopper to a predetermined depth. A sliding plate portion formed in the shape of a tongue piece with a notch, the free end portion of the sliding plate portion being 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.

Images