JP2000077920A - Method for fixing filament antenna element to sleeve and antenna device for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speedily and easily fix a filament antenna element made of shape memory alloy to a sleeve-shaped member at low cost by fitting a caulking ring at one end of the filament antenna element, caulking the element and press-fitting, fixing this element into the press-fitting part of the sleeve-shaped member. SOLUTION: Concerning a filament antenna fixing sleeve 2', the central hole of large diameter capable of inserting an antenna cover 3 and an antenna inserting hole 2a capable of being fitted with a filament antenna element 1 so as to freely slide are concentrically formed and a central hole with step is passed through. One end of the filament antenna element 1, with which a caulking ring 4' is caulked to the other terminal part, is inserted to the antenna inserting hole 2a as shown by an arrow (i) and the caulking ring 4' is press- fitted and fixed into a press-fitting part 2a, namely, near the opening end of the antenna inserting hole 2a. Thus, the filament antenna element 1 is inserted into the tube-shaped antenna cover 3 as shown by a virtual line 1' while fixing one end through the filament antenna fixing sleeve 2'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device having a striated antenna element. The present invention relates to a technique for attaching an antenna element, and more particularly, to a technique in which a linear antenna element made of a shape memory alloy can be quickly and easily fitted to a sleeve-shaped member.

[0002]

2. Description of the Related Art A linear antenna element is used in various communication devices, and is an important component particularly in a mobile communication device such as a portable radio telephone. This linear antenna element can be used alone or in combination with a helical antenna element. The length of the linear antenna element is set to, for example, １ ／ wavelength based on the wavelength of the radio wave used.
The radio wave used in mobile radio is generally of a very high frequency, and therefore has a short wavelength. For this reason, the linear antenna element used in the portable radio telephone is generally a wire having a length of about several centimeters. In order to attach the linear antenna element, which is a wire-shaped member having a length of several centimeters, to the wireless device case so as to be able to expand and contract, a sleeve-shaped member is fixed to the linear antenna element. The reason is that a single linear antenna element is only a single wire that is too thin, so that it can be used as a handle for supporting this upright and an adapter for connecting the helical antenna element to one end. Also, as a stopper when the linear antenna element is pulled out from the radio device case and extended, a sleeve-like member is fitted and fixed to the outside and attached to both ends of one short wire that is the linear antenna element. The reason is that a sleeve-like member is attached to increase the apparent outer diameter slightly. In the present invention, the term “sleeve shape” means a cylindrical or tubular shape having an inner diameter dimension that can be fitted onto the linear antenna element.

For example, as a simple method of inserting and fixing a linear antenna element 1 as shown in FIG. 1 (A) through a linear antenna fixing sleeve 2, one end of the linear antenna element 1 is provided. A local pressure is applied to perform a local rolling 1a (so-called crushing). Then, the local rolled portion 1a is inserted into the antenna insertion hole 2a formed as the center hole of the linear antenna fixing sleeve 2 as shown by an arrow i, and the local rolled portion 1a is pressed into the press-fit portion 2b. Thereby, the linear antenna element 1 is prevented from sliding, and is fixed to the linear antenna fixing sleeve 2. Reference numeral 3 shown in FIG.
It is a tubular antenna cover made of synthetic resin. By the above-described operation, the linear antenna element 1 drawn by a solid line is inserted into the antenna cover 3, and is fixed to the linear antenna fixing sleeve 2 as indicated by 1 'drawn by a virtual line. Paying attention to the striated antenna element 1 'drawn by a virtual line, since the striated antenna fixing sleeve is attached to one end of the striated antenna element 1', for example, the ), The linear antenna element 1 ′
Can be reliably supported. In addition, it is convenient to construct an antenna device, for example, it is possible to make contact and conduction with the linear antenna element 1 'over a wide area via the above-mentioned metal tubular member (not shown).

[0004]

For example, a linear antenna element used for a portable unit of a portable radio telephone is a wire having a diameter of less than 1 mm and a length of about several centimeters, and is used by projecting from a case of the radio unit. Is done. For this reason,
There are many cases where an excessive external force is applied by accidentally colliding or dropping an external obstacle. If the above-mentioned linear antenna element is made of a copper wire or a mild steel wire, it is a fact that it is bent immediately by carelessness. However, given the widespread use of mobile wireless telephones in the general public, it is not easy to draw the user's attention, and excessively emphasizing the warning may lower the image of product quality and, in turn, reduce trust. I will not be without it. If the linear antenna element is made of a hardened hard steel wire such as a piano wire, the wire is not easily bent, but it is difficult to repair the bent wire. If the quenched state is hardened so as not to bend, there is a possibility that it will break and break when an excessive force is applied. In order to solve such a problem, a material for a linear antenna made of a shape memory alloy has been developed and supplied in a readily available state. For example, in Memo Alloy (trade name) manufactured by Tokin Co., Ltd., even if an external force is applied to cause distortion, the residual distortion becomes practically zero when the temperature becomes 0 ° C. or more. In other words, even when strained at a low temperature, it completely recovers at 0 ° C. or higher. Therefore, at a temperature of 0 ° C. or higher, the material returns to its original shape like rubber even when bent or pulled. (The property of returning to the original shape is compared to rubber, but the hardness is much higher than rubber, for example, about Vickers hardness of about 300). Therefore, when the memo alloy wire antenna element (φ1) is bent with a fingertip, the response is harder than that of the piano wire, and even if it is bent, it rebounds violently and returns straight. Such characteristics are obtained by lowering the martensitic transformation point to several tens of degrees below zero (° C.) with a Ti—Ni alloy. Except for the fact that the price is correspondingly high, the linear antenna is used. It is currently the most excellent material for devices.

However, when the linear antenna element made of a shape memory alloy is to be fixed to the linear antenna fixing sleeve 2 by the method shown in FIG. 1A, local rolling 1a may be applied. You will encounter technical difficulties that cannot be easily achieved. As described above, this type of linear antenna shape memory alloy (for example, メ モ 1 memo alloy wire) is harder than the piano wire, so that it cannot be easily crushed even if it is hit with a hammer or pressed with a press. If you order specially from a manufacturer of wire antennas made of shape memory alloy, you will be able to supply wires of the desired shape and dimensions through a process consisting of special heat treatment and plastic working. It takes a considerable number of days from delivery to delivery. Such a situation is particularly troublesome when an antenna manufacturer produces a large number of models in small quantities and changes the design of mass-produced products. The present invention has been made in view of the above circumstances, and provides a technique for quickly, easily, and inexpensively fixing a linear antenna element made of a shape memory alloy to a sleeve-like member. Accordingly, an object of the present invention is to provide an antenna device in which a shape memory alloy is fixed to a linear antenna sleeve.

[0006]

The basic principle of the present invention created to achieve the above-mentioned object will be described with reference to FIG. 1 which schematically shows one embodiment of the present invention in comparison with a conventional example. Briefly, it is as follows. That is, in order to insert and fix the linear antenna element 1 made of an ordinary material into the antenna insertion hole 2a of the linear antenna fixing sleeve 2,
As shown in (A), a local rolling 1a is formed, and this is press-fitted and fixed to the press-fitting portion 2b of the wire antenna fixing sleeve 2. When this wire antenna element 1 is made of a shape memory alloy, It is very difficult to form a local rolling (crushed portion) 1a. Therefore, in the present invention, as shown in (B), a swaging ring is fitted to one end of the linear antenna element 1 so that the linear antenna element made of a shape memory alloy can be fixed to the sleeve-shaped member (2). It is then caulked, and this is press-fitted and fixed to the press-fit portion 2c of the sleeve-shaped member (2 ').

According to the first aspect of the present invention, based on the principle described above, a linear antenna element made of a shape memory alloy is inserted into a sleeve-like member, and both members slide with respect to each other. In the method of fixing so as not to, in the sleeve-shaped member, a stepped center hole formed of a concentric large diameter portion and a small diameter portion is formed, and one side in the axial direction of the center hole, The linear antenna element is configured to have a small diameter that can be slid, and the other side in the axial direction of the center hole is configured to have a large diameter that can be fitted to the outer periphery of the tubular antenna cover. An antenna cover is inserted into the large diameter portion and fitted, and after the antenna cover is fitted or before the fitting, in the vicinity of one end of the linear antenna element, an annular fitting is fitted thereto. Crimping by fitting members The side of the linear antenna element, on which the annular member is not crimped, is inserted from the small-diameter side of the center hole of the sleeve-shaped member and inserted therethrough, and the annular member is placed near the opening end of the small-diameter portion of the center hole. It is characterized by press-fitting and fixing. According to the method of the invention described in claim 1 described above, since the linear antenna element is made of a shape memory alloy, it is very difficult to form a rolling mark for press-fitting and fixing by subjecting its end to plastic working. However, there is no need to form rolling marks, and by crimping an annular member, an “apparent large-diameter portion” is formed at the end of the linear antenna element. The annular member having a larger diameter than the line "can be fitted around the small diameter portion of the center hole of the sleeve-shaped member. In this way, the linear antenna element and the annular member are fixed by caulking and the annular member is press-fitted and fixed to the small diameter portion of the center hole of the sleeve-like member. Is fixed to the sleeve-like member via an annular member. Further, since the large-diameter portion is formed concentrically with the small-diameter portion of the sleeve-shaped member center hole, the end of the tubular antenna cover externally fitted to the linear antenna element is inserted into the large-diameter portion. In this way, the outer peripheral surface of the linear antenna element is covered with the sleeve-like member and / or the antenna cover, and is not exposed to the outside air. In this way, the linear antenna element is shielded from the outside air by the sleeve-shaped member and the antenna cover, and is protected from chemical corrosion.

According to a second aspect of the present invention, there is provided a method of inserting a linear antenna element made of a shape memory alloy into a sleeve-like member and fixing the two members so that they do not slide with each other. A stepped center hole formed of a concentric large-diameter portion and a small-diameter portion is formed in the sleeve-shaped member, and one side of the center hole in the axial direction is formed as a tubular antenna of a linear antenna element. A small diameter portion that can be fitted to the outer periphery of the cover is formed, and a larger diameter portion is formed on the other side to form a stepped center hole. On the other hand, a large diameter portion is formed separately from the sleeve-shaped member. Forming a stepped shaft-shaped member having a portion and a small-diameter portion, and forming an antenna fitting terminal by providing a center hole for fitting the linear antenna element in the stepped shaft-shaped member,
In the vicinity of one end of the linear antenna element, an annular member fitted thereto is fitted and caulked, and the linear antenna element is inserted into the antenna fitting terminal, and the annular member is connected to the antenna. The linear antenna element with the fitting terminal is formed by press-fitting into the vicinity of the opening of the center hole of the fitting terminal and fixing the sliding of both members to each other to form the linear antenna element with the fitting terminal. The small-diameter portion of the stepped shaft-shaped member is slidably fitted to the small-diameter portion formed in the center hole of the sleeve-shaped member, and the stepped shaft-shaped portion of the antenna fitting terminal is formed. The large-diameter portion is fitted into the large-diameter portion of the sleeve-shaped member central hole and press-fitted and fixed, or the stepped central hole and the stepped surface of the stepped shaft-shaped member are brought into contact to act as a stopper. Features. Claim 2 described above
According to the invention method, by fitting an annular member to the linear antenna element and caulking, an apparent large diameter portion is formed near one end thereof, and the large diameter portion is formed in the center hole of the antenna fitting terminal. Press fit. Through the above steps,
The linear antenna element is fixed to the antenna fitting terminal without requiring plastic working, and a linear antenna element with a fitting terminal is formed. Since plastic working is not required, there is no fear that processing technology will be difficult even if the linear antenna element is made of a shape memory alloy that is difficult to perform plastic working. The outer peripheral surface of the antenna fitting terminal to which the linear antenna element is fixed as described above has a stepped shaft shape having large and small diameter portions.
The center hole of the sleeve-shaped member is also a stepped hole having large and small diameter portions. Because of such a relationship, the sleeve-shaped member and the antenna fitting terminal can be tightly fitted to each other and fixed by press-fitting (fixed fitting fixed), or they can be mutually fitted by contacting the stepped surfaces. It can also be positioned.
With such a configuration, the annular member is caulked and fixed to the linear antenna element, the annular member is press-fitted and fixed to the antenna fitting terminal, and the antenna fitting terminal is press-fitted or fixed to the center hole of the sleeve-shaped member. . In summary, even if the linear antenna element is made of a shape memory alloy, it is fixed to the sleeve-like member without requiring plastic working. Moreover, the position of the antenna fitting terminal (to which the linear antenna element is fixed) fixed in the sleeve-shaped member as described above can be appropriately set in design. Here, the meaning and significance of being able to be set appropriately are as follows: "The caulking position of the annular member with respect to the linear antenna element is limited to the vicinity of the end of the linear antenna element, and The press-fitting fixing position for the fitting terminal is also limited near the end face of the antenna fitting terminal (that is, near the opening of the center hole), but the antenna fitting terminal is fixed in the center hole of the sleeve-shaped member. The position can be appropriately determined with respect to the axial direction of the sleeve-shaped member. " This makes it possible to make the length of the assembly in which the sleeve-shaped member and the linear antenna element are combined larger than the length of the linear antenna element alone, and to use a shape memory alloy, which is an expensive material. The amount can be saved. Therefore, it is possible to reduce the manufacturing cost of an antenna device incorporating a linear antenna element made of a shape memory alloy. The current state of technological improvements for mobile phone and PHS antennas is 0.1
The weight loss effect is important because you are competing to reduce gram weight.

According to a third aspect of the present invention, there is provided a linear antenna element made of a shape memory alloy, which is supported on a wireless device case so as to be slidable and slidable and most of which is covered by a tubular antenna cover. In a method of mechanically fixing and electrically conducting with respect to an “antenna support sleeve that can be fitted / removed with respect to a cylindrical antenna guide penetrated and fixed to the radio device case”, A metal annular or metal cylindrical terminal member is fitted to one end of the linear antenna element and caulked, and the terminal member caulked to the linear antenna element is press-fitted and fixed to a center hole of the antenna support sleeve. At the same time, an antenna cover externally fitted to the linear antenna element is inserted into a center hole of the antenna support sleeve, and the antenna support sleeve faces the antenna cover. By attaching crimped, to prevent relative sliding between the antenna support sleeve and the antenna cover. According to the invention method of claim 3 described above,
When constructing an antenna device of a type in which a tubular antenna cover is put on a linear antenna element made of a shape memory alloy and supported so as to be able to expand and contract with respect to a radio device case, the following is required. The linear antenna element is easily and securely fixed to an antenna supporting sleeve for mechanically supporting the base end and electrically connecting the linear antenna element to the radio circuit. In addition to being able to conduct electricity, it is possible to keep the space between the antenna support sleeve and the antenna cover watertight so as to prevent rainwater from entering the case. In particular, a configuration is adopted in which a relatively small-diameter antenna fitting terminal that can be fitted into a relatively large-diameter antenna support sleeve is used, and the antenna fitting terminal is caulked to the linear antenna element. Therefore, compared with a configuration in which a large-diameter sleeve is directly fitted to a thin (about φ1) linear antenna element and caulked, it can be caulked with a smaller force and surely. High processing quality reliability as parts. Furthermore, the position at which the antenna fitting terminal to which the linear antenna element is caulked is press-fitted and fixed in the center hole of the antenna support sleeve is not particularly limited, and can be appropriately set. The required amount of the expensive shape memory alloy can be reduced. The meaning and significance of the above savings are as follows. That is, in an antenna device of a type that supports the linear antenna element so that the linear antenna element can expand and contract, the linear antenna element is fixed to the antenna support sleeve in order to support the base end of the linear antenna element in an extended state in a detachable manner. The antenna support sleeve is made of a metal material so as to also serve to electrically connect and conduct the linear antenna element to the radio circuit, and is a hard member that can be regarded as a rigid body in practical use. Therefore, from the viewpoint of mechanical support and the viewpoint of electrical contact conduction,
It is not necessary to penetrate the linear antenna element made of a shape memory alloy over the entire length of the antenna support sleeve in the axial direction. For these reasons, the press-fitting and fixing position of the antenna fitting terminal with respect to the antenna supporting sleeve is appropriately set, and the length of the overlapping portion between the antenna supporting sleeve and the linear antenna element with the antenna fitting terminal is necessary and sufficient. By doing so, it is possible to reduce the amount of expensive shape memory alloy wire used, without the risk of hindering performance.

According to a fourth aspect of the present invention, there is provided a method for mounting a helical antenna element on a joint sleeve which functions as an adapter for a linear antenna element made of a shape memory alloy. In the method of attaching and fixing the antenna element,
One end of the helical antenna holder is formed in a cylindrical shape having a large diameter substantially equal to the winding diameter of the helical antenna, and the other end is formed in a cylindrical shape having a smaller diameter than the winding diameter of the helical antenna. A female screw is formed on the inner peripheral surface of the tubular portion, a male screw is formed at one end of the joint sleeve to be screwed with the female screw, and the joint sleeve is positioned near the other end of the joint sleeve. Partitioning the inner space of the center hole of, providing a partition wall with a through hole through which the linear antenna element can be inserted, inserting a linear antenna element with an annular member caulked in advance at one end into the through hole of the partition wall, The annular member is pressed against the partition wall, and the annular member is press-fitted and fixed in the joint sleeve. According to the method of the invention described in claim 4 described above, even if the linear antenna element is made of a shape memory alloy and plastic working is difficult, it is not necessary to apply the plastic processing to the linear antenna element, Easily and securely, and connected to the helical antenna element via the joint sleeve to form a composite antenna device consisting of a linear antenna element and a helical antenna element, Can be slidably mounted. Further, a helical antenna holder is attached to one end of the joint sleeve, and the `` annular member crimped to one end of the linear antenna element '' is located near the other end of the joint sleeve,
When the joint sleeve is made of an electrically insulating material,
The linear antenna element and the helical antenna element are electrically insulated from each other, are mechanically separated from each other, and are mechanically connected to each other. Such electrical and mechanical properties are extremely useful when constructing certain known antenna devices.

According to a fifth aspect of the present invention, in addition to the constituent features of the third and fourth aspects of the present invention, a sleeve-like member fixed to the shape memory alloy wire antenna element, or Forming a cylindrical antenna guide slidably fitted to the cylindrical member fixed to the sleeve-shaped member, and penetrating and fixing the cylindrical antenna guide to a wall of a radio device case; A step spring device is incorporated in the inner peripheral portion of the shape guide in advance, and a metal spring member elastically swelling toward the inner peripheral side of the step spring device is provided,
Similarly, by providing a protrusion made of synthetic resin that resiliently swells inward, the cylindrical antenna guide is electrically connected to the linear antenna element via the metal spring member, and The synthetic resin projections provide frictional resistance and / or moderation to the expansion and contraction sliding of the linear antenna element. According to the above-described method of the present invention, the linear antenna element can be used without causing the sleeve member to which the linear antenna element is fixed or the tubular member fixed to the sleeve member to be worn out at an early stage. It is possible to ensure that the wireless circuit is brought into contact with conduction, to provide an appropriate response to the expansion and contraction sliding operation of the linear antenna element, and to maintain the extended and upright state and the contracted and retracted state. In the prior art, in general, a metal spring member (mainly a ring-shaped spring) provides electrical contact and continuity, and at the same time obtains frictional resistance of expansion and contraction and a sense of moderation in operation, so that the elasticity of the metal spring member is reduced. In order to obtain a desired frictional resistance and a sense of moderation by strengthening the metal spring member, there has been a problem in that the metal spring member causes scratches on the sleeve-shaped member. By sharing the role of electrical contact conduction and frictional resistance and moderation due to the synthetic resin protrusion, electrical contact and conduction without causing scratches,
It was possible to achieve both mechanical sliding friction and moderation.

According to a sixth aspect of the present invention, in addition to the constituent elements of the fourth aspect of the invention, a linear antenna element having an annular member caulked at one end in advance is formed on a partition wall in a joint sleeve. After inserting the annular member into the through hole through the male screw side of the joint sleeve and pressing the annular member against the partition wall to press-fit the annular member into the center hole of the joint sleeve, the ring member is densely inserted into the center hole of the joint sleeve. It is intended to press-fit and fix a synthetic resin pin for clamping, which is a cylindrical member to be fitted, from the male screw side of the joint sleeve into the center hole to reinforce the bending resistance against the external force of the hollow joint sleeve. Features. When the method of the sixth aspect described above is used in combination with the method of the fourth aspect of the present invention, the space formed in the joint sleeve, which is a hollow member, is simply filled with a synthetic resin clamp pin. With this configuration, the joint sleeve can be reinforced, and even if a user of the portable radio telephone equipped with the linear antenna element applies an impulsive external force such as accidentally removing the portable radio telephone, it is not easily damaged. In addition, the press-fitting of the clamp pin also serves to supplement the function of preventing the “annular member fitted in the joint sleeve that is caulked to the linear antenna element” according to the present invention.
The fixed state of the linear antenna element is further ensured.

According to a seventh aspect of the present invention, there is provided an antenna device in which a linear antenna element made of a shape memory alloy is supported on a wireless device case so as to be able to expand and contract and slide. A sleeve-shaped member is fixed to at least one end of the sleeve-shaped member, and at least a part of the sleeve-shaped member is provided with a center hole having a hole diameter slidably fitted to the linear antenna element. A central hole having a hole diameter to be fitted to the antenna is open on at least one end surface of the sleeve-shaped member, and an annular or cylindrical member is externally fitted near one end of the shape memory alloy linear antenna element. The linear antenna element is inserted into the center hole of the sleeve-like member, and the annular or cylindrical member crimped to the linear antenna element is formed. Characterized in that near the open end of the central hole of the sleeve-like member is press-fitted relative sliding of both members is prevented. Claim 7 described above.
According to the apparatus of the invention, the advantage (flexible and not plastically bent or deformed or broken and broken) due to the linear antenna element being a shape memory alloy is not impaired, and Even if plastic working (formation of rolling marks) cannot be performed due to the shape memory alloy, an annular or cylindrical (including tubular) member is crimped near the end of the linear antenna element. Therefore, the caulking member is press-fitted and fixed in the center hole of the sleeve-shaped member, so that the shape memory alloy linear antenna element is securely fixed to the sleeve-shaped member. As mentioned above, as a result of the fact that there is no need to subject the linear antenna element to plastic working, the antenna manufacturer purchased a long wire made of a shape memory alloy (a so-called wire) from a special metal material manufacturer and purchased it. It can be cut to a desired length and used as a linear antenna element. In this way, the fact that antenna manufacturers can easily manufacture linear antenna elements made of shape memory alloy with arbitrary length dimensions makes it possible to economically produce a small number of models and easily change the design at the antenna manufacturer. (Specifically, when the design department of the antenna manufacturer changes the design, the manufacturing department can adapt quickly, easily and without significant loss. As a result, the design department disturbs the manufacturing department. You can change the design without worrying about it).

An antenna device according to an eighth aspect of the present invention is an antenna device having a linear antenna element made of a shape memory alloy supported to be slidable with respect to a case of a radio device. When the strip antenna element is extended, an antenna support sleeve for supporting the strip antenna element with respect to the radio device case is fixed to one end of the linear antenna element, and the center hole of the antenna support sleeve is A stepped shape having a large diameter portion and a small diameter portion is formed, and a cylindrical antenna fitting terminal is caulked to one end of the linear antenna element, and the antenna fitting terminal is an antenna. When the end portion of the tubular antenna cover externally fitted to the linear antenna element is inserted into the central hole of the support sleeve by press-fitting and fixed to the small diameter portion of the support sleeve central hole. In, and an end portion of the antenna support sleeve is crimped toward the antenna cover. According to the apparatus of the eighth aspect described above, it is not necessary to apply plastic working to the linear antenna element made of a shape memory alloy, and it is mechanically fixed to the antenna support sleeve and electrically contacted. The conductive wire can be saved, and the "expensive wire rod for a linear antenna element made of a shape memory alloy" can be saved by about half the length of the antenna supporting sleeve. That is, since the cylindrical antenna fitting terminal crimped to the linear antenna element is press-fitted and fixed in the center hole of the antenna support sleeve,
The linear antenna element is fitted around the antenna support sleeve via the antenna fitting terminal, is mechanically firmly connected, and is electrically and reliably electrically conductive. In addition, since the antenna support sleeve is added to the linear antenna element in this manner, the length of the standing wave on the added antenna support sleeve is limited by the expensive shape memory alloy. Wire is saved.

According to a ninth aspect of the present invention, there is provided an antenna device comprising a helical antenna element connected to a linear antenna element made of a shape memory alloy via a sleeve-shaped joint member. A male thread is formed at one end of the joint sleeve, which is a tubular member, and a partition having a through hole through which a linear antenna element can be inserted is provided near the other end by separating from the other end. On the other hand, an annular or cylindrical or tubular member having an outer diameter to be fitted around the center hole of the joint sleeve is crimped near one end of the linear antenna. An annular or cylindrical or tubular member crimped to the linear antenna element inserted into the through hole of the partition is abutted and positioned on the male screw side surface of the partition. A large-diameter tubular portion press-fitted and fixed in the center hole of the joint sleeve and fitting and supporting the helical antenna element, and a small-diameter tubular portion fitted externally to the joint sleeve are coaxially and integrally connected. A helical antenna holder is provided, and a male screw formed on the inner peripheral surface of the small-diameter cylindrical portion of the helical antenna holder is screwed and fixed to the joint sleeve. The end of a tubular antenna cover externally fitted to the linear antenna element is fitted in a center hole near the end opposite to the end. According to the ninth aspect of the present invention described above, even if the linear antenna element is made of a shape memory alloy and is in a heat treatment state in which plastic processing cannot be performed, the linear antenna element is formed in a ring shape (tubular or tubular shape). It is necessary to apply plastic working to the linear antenna element with a simple structure in which the member is crimped and the annular member is press-fitted and fixed in the center hole of the joint sleeve. In addition, the linear antenna element and the helical antenna element can be mechanically and concentrically contacted and fixed. In addition, since the end of the tubular antenna cover externally fitted to the linear antenna element is fitted into the center hole of the joint sleeve, the abutting portion between the end of the antenna cover and the joint sleeve has an external appearance. It does not appear. That is, the linear antenna element is protected without being exposed at the joint between the antenna cover and the joint sleeve.

According to a tenth aspect of the present invention, in addition to the constituent elements of the ninth aspect of the present invention, the antenna device according to the ninth aspect further comprises a synthetic resin circle in the center hole of the joint sleeve made of a metal material. A clamp pin as a columnar member is press-fitted and fixed. When the invention of claim 10 described above is used in combination with the invention device of claim 9,
Even if the joint sleeve is relatively thin and relatively long, the space inside the center hole is filled with the synthetic resin, and the force withstanding the external bending force increases. For this reason,
Even if the portable radiotelephone equipped with the antenna device is dropped or hit against an external obstacle to give a shocking external force due to the negligence of the user, the joint sleeve fixed to the linear antenna element bends and plastically deforms. There is no risk of breakage or breakage, and excellent durability can be obtained.

According to an eleventh aspect of the present invention, in addition to the constituent features of the eighth or ninth aspect of the present invention, an antenna support fixed to the shape memory alloy linear antenna element is provided. A ring-shaped groove is formed on the outer peripheral surface of the sleeve, or a joint sleeve also fixed to the linear antenna element, and a cylindrical shape slidably fitted to the antenna supporting sleeve or the joint sleeve. An antenna guide member is penetrated and fixed to the wall of the radio device case to guide the expansion and contraction sliding of the linear antenna element, and a step spring device is fitted on the inner periphery of the tubular antenna guide member. The step spring device is provided with (a) an electric contact which slides on the antenna support sleeve or the joint sleeve and is electrically connected. (B) elastically engages with and disengages from the ring-shaped groove of the antenna support sleeve or the joint sleeve, thereby forming the antenna support sleeve or the joint sleeve in the axial direction of the antenna support sleeve or the joint sleeve. And a projection made of synthetic resin that provides moderation to sliding. According to the apparatus of the eleventh aspect described above, a leaf spring sharing electric contact conduction,
Since the projections made of synthetic resin for providing the moderation are provided, there is no fear of causing early damage (scratch) to the antenna support sleeve and the joint sleeve, and reliable contact conduction and appropriate moderation can be obtained. In other words, since the metal leaf spring does not have the role of "engaging the ring groove to provide moderation", reliable conduction can be obtained over a wide contact surface, and the synthetic resin projection does not damage the mating member. Without worry, the required force can be engaged with the ring groove, and by integrating the actions of both, reliable contact conduction and proper moderation can be obtained.

[0018]

FIG. 1 is a schematic cross-sectional view illustrating a technique for fixing a linear antenna element according to the present invention in comparison with a conventional technique. FIG. (B) shows an assembling process in one embodiment of the present invention, corresponding to the invention method of claim 1 and the invention device of claim 7, and (C) shows an assembly process in an embodiment different from the above. 4 shows a process and corresponds to the invention method of claim 2, showing a disassembled state and an assembled state.
The linear antenna element 1 of the embodiment shown in FIG. 1B is made of a shape memory alloy, and the local rolling 1a can be formed by plastic working as shown in FIG. Can not. Therefore, a swaging ring 4 drawn by a solid line is formed, and swaged as shown at 4 'near one end of the linear antenna element 1.

The caulking ring 4 is a metal cylindrical member. In the present invention, the member to be caulked at the end of the linear antenna element does not change in principle whether it is annular, cylindrical, or tubular. When it is not confusing, it is simply referred to as a ring or tube, but it is a general term for a ring, tube and short tube. Further, it may be a so-called wound bush-shaped member. In the present invention, "caulking"
The term refers to a state in which a cylindrical member externally fitted to a cylindrical member is subjected to plastic working in a form of contraction to form a "shrink fit" state. It is not always the same as “processing”. This figure 1 (B)
Has a large-diameter central hole into which the antenna cover 3 can be inserted and an antenna insertion hole 2c which can be slidably fitted to the linear antenna element 1. The stepped center hole penetrates. The other end of the linear antenna element 1 in which a caulking ring 4 'is caulked at one end is inserted into the antenna insertion hole 2a as shown by an arrow i, and the caulking ring 4' is inserted into the press-fitting portion 2c (that is, the antenna insertion hole 2c). The linear antenna element 1 is press-fitted and fixed near the opening end of the hole 2c, whereby one end of the linear antenna element 1 is fixedly penetrated to the linear antenna fixing sleeve 2 ', and the imaginary line 1 is inserted into the tubular antenna cover 3. The insertion of the linear antenna element 1 into the linear antenna fixing sleeve 2 'and the insertion of the antenna cover 3 do not matter before or after the work order.

The embodiment of FIG. 1C is similar to that of FIG.
In this embodiment, an antenna fitting terminal is interposed between the linear antenna element 1 and the linear antenna fixing sleeve. 6 'drawn by a virtual line is an antenna fitting terminal before assembly, and 6 drawn by a solid line is an antenna fitting terminal in an assembled state. The above-mentioned antenna fitting terminal 6 ′
A stepped shaft-shaped member having a center hole formed therein for fitting to the linear antenna element 1, and a large-diameter portion and a small-diameter portion are formed concentrically on the outer peripheral surface thereof. On the other hand, a large-diameter portion and a small-diameter portion are also provided concentrically in the center hole of the linear antenna fixing sleeve 5, and the large-diameter portion of the central hole of the linear antenna fixing sleeve 5 has a large diameter of the antenna fitting terminal 6. It is configured to slidably fit with the diameter portion. The small-diameter portion of the center hole of the linear antenna fixing sleeve 5 is configured to be slidable with the outer peripheral surface of the antenna cover 3 and to be fitted to the small-diameter portion of the outer periphery of the linear antenna fitting terminal 6. ing. A crimp ring 4 'is crimped to one end of the linear antenna element 1, and is press-fitted and fixed to the antenna fitting terminal 6'. The “antenna fitting terminal 6 with the linear antenna element 1” configured as described above is inserted into the center hole of the linear antenna fixing sleeve 5, and is press-fitted and fixed at the position indicated by the solid line 6.
As can be understood by comparing FIG. 1 (C) with FIG. 1 (B), the linear antenna element 1 ″ at the assembly position in the embodiment of FIG. In comparison with the linear antenna element 1 'at the assembling position in the embodiment, it is sufficient to be shorter by the illustrated dimension L. Since the shape memory alloy is an expensive material,
The material cost can be reduced by being able to be shortened by the above dimension L.

FIG. 2 shows an embodiment of an antenna device according to the present invention constituted by applying the method of fixing a linear antenna element according to the present invention, and shows both ends except for the vicinity of the center. 4) is a partial cross-sectional view of an antenna supporting sleeve which is fixed to a base end portion of a linear antenna element and mechanically supports the linear antenna element and electrically contacts and conducts the antenna element. (B) is a partial cross-sectional view of a helical antenna holder fixed to the distal end of the linear antenna element and mechanically connected to the helical antenna element. I have. FIG. 2 shows the configuration of each of the inventions of claims 3 to 11, but the details of the configuration of each of these inventions are shown in FIGS. 3 to 6, respectively. The overall configuration of FIG. 2 will be briefly described. The linear antenna element 1 is a single member made of a shape memory alloy. However, since the vicinity of the center is cut away and omitted, the distal end is also drawn in FIG. (B)
Also in the figure, reference numeral "1" is attached to each of them to indicate that they are linear antenna elements. See FIG. 2A. The linear antenna element 1 has a metal cylindrical antenna fitting terminal 6 caulked at its base end. Although not shown, a caulking ring is caulked to the linear antenna element 1 and
The caulking ring may be press-fitted and fixed to the center hole of the antenna fitting terminal 6 (this results in a form similar to the embodiment of FIG. 1C). A ring groove 7b is formed in the outer peripheral portion of the antenna support sleeve 7. The operation and effect of the ring groove 7b will be described later in detail with reference to FIG.
In the center hole of the antenna support sleeve 7, a large diameter portion 7c and a small diameter portion 7d are formed concentrically, and the antenna fitting terminal 6 is press-fitted and fixed to the small diameter portion 7d. The end of the antenna cover 3 is fitted into the small diameter portion 7d of the center hole of the antenna support sleeve, and the antenna support sleeve 7 is crimped toward the antenna cover 3 (7).
a). Thereby, the watertightness of the caulking portion 7a is maintained,
There is no risk of intrusion of rainwater. In order to perform the crimping process as described above, the support sleeve 7 is formed of a metal material in a tubular shape (which is the same as the sleeve shape).

See FIG. 2B. As described above, the linear antenna element 1 with the antenna fitting terminal 6 caulked at one end.
A caulking ring 4 is caulked near the other end of the joint, and the caulking ring 4 is press-fitted and fixed to a center hole of a joint sleeve 8 made of an electrically insulating material. The joint sleeve 8 is screwed to a helical antenna holder 10 on which the helical antenna element 9 is mounted (screw portions 8a and 10).
a). In this way, the linear antenna element 1 and the helical antenna element 9 are mechanically connected and fixed and are electrically insulated. A cylindrical antenna guide 12 is fixedly installed through a wall 15 of the wireless device case.
In the state shown in FIG. 2, the linear antenna element 1 is housed and slid to the left in the figure to be in the housed state, and the helical antenna holder 10 described above is fitted to the cylindrical antenna guide 12. . The reference numeral 11 denotes an antenna cap, which protects the helical antenna element 9. A step spring device 13 is fitted on the inner peripheral side of the cylindrical antenna guide 12 to electrically conduct to the helical antenna holder 10 and to elastically engage with the ring groove 10b of the helical antenna holder 10. This gives moderation to the sliding. The details of the configuration of the step spring device and the operation and effect thereof will be described later in detail with reference to FIG. Reference numeral 14 in FIG.
The crankpins indicated by are filled with and reinforced the internal space of the joint sleeve 8 which is a tubular member. The detailed configuration of the joint sleeve 8 will be described later with reference to FIG. 4, and the detailed configuration of the crank pin 14 will be described later with reference to FIG.

FIG. 3 shows details of the vicinity of the antenna supporting sleeve shown in FIG. 2A, and corresponds to the method of the invention of claim 3 and the apparatus of the invention of claim 8, and FIG. Explanatory drawing in which spots for facilitating reading are added to an exploded cross-sectional view drawn by breaking, and (B) is a cross-sectional view drawn in part in an assembled state, and a symbol indicating a processing portion is provided. FIG. As shown in FIG. 3A, in the present embodiment, a large-diameter portion and a small-diameter portion are formed on the outer peripheral surface of the antenna fitting terminal 6, and the end of the linear antenna element 1 is provided at a position corresponding to the small-diameter portion. Insert the part and crimp it.
If this portion is thick, an excessive force is required for crimping, so that the outer peripheral surface is made small in diameter and thin. The fact that a part of the linear antenna element 1 is spotted corresponds to the insertion small diameter part (thin part), which facilitates the reading. The center hole of the antenna support sleeve 7 is a stepped hole in which the large diameter portion 7c and the small diameter portion 7d are arranged concentrically, and the large diameter portion (thick portion) of the antenna fitting terminal 6 is centered. It is press-fitted and fixed to the small diameter portion 7d of the hole.

FIG. 4 shows a joint sleeve 8, a linear antenna element 1, an antenna cover 3, a caulking ring 4, a helical antenna holder 10 from among the constituent members shown in FIG. FIG. 9 is a cross-sectional view of the helical antenna element 9 extracted and drawn, corresponding to the invention method of claim 4 and the apparatus of claim 9, wherein (A) disassembles the helical antenna holder 10 and the joint sleeve 8. (B) illustrates the same screwed state. See FIG. The joint sleeve 8 is a sleeve-like (cylindrical) member made of a synthetic resin, and has a male screw 8a formed at one end thereof. A partition wall 8a is provided near the other end and slightly separates from the other end (in this example, at a distance of about the pipe diameter) to partition the inside of the cylinder. A through hole 8c through which is inserted. The swage ring 4 swaged to the linear antenna element 1 is pressed into the joint sleeve 8 by abutting the partition wall 8a. An end of the antenna cover 3 is inserted into the joint sleeve 8 so as to face the caulking ring 4 via the partition wall 8a. Thereby, the antenna cover 3
If there is a gap between the end of the joint sleeve 8 and the partition wall 8a of the joint sleeve 8, the gap does not appear in the appearance. That is, the linear antenna element 1 is protected without being exposed to the outside air. The helical antenna holder 10 has a large-diameter cylindrical portion 10c.
And a small-diameter tubular portion 10d are concentrically and integrally formed in a stepped tubular shape, and a helical antenna element 9 is fitted (in a form similar to screwing) to an end of the large-diameter tubular portion 10c. I have. The small-diameter cylindrical portion 10d is formed so as to be able to fit on the joint sleeve 8, and a female screw 8a corresponding to the male screw 8a is formed. Insert the male screw 8a of the joint sleeve 8 into the small-diameter cylindrical portion 10d of the helical antenna holder 10, and
FIG. 4 (B) shows the state when screwed and fastened to a. A ring groove 10b is formed on the outer periphery of the small-diameter cylindrical portion 10d of the helical antenna holder 10. The operation will be described later with reference to FIG.

FIG. 5 is a partial cross-sectional view schematically showing the clamp pin 14 and the related components extracted from the components shown in FIG. 2B. (A) represents an assembling operation step of inserting a clamp pin, and (B) represents a state in which the clamp pin is inserted. I have.

As described above with reference to FIG. 4, the fact that the joint sleeve 8 is tubular and has a center hole enables, in part, the insertion and press-fitting of the swaging ring. For one, the joint sleeve 8 is lightened. If attention is paid to the lightening effect, it is desirable that the joint sleeve 8 be as thin as possible. However, when the thickness is reduced, the mechanical strength decreases, and in particular, the bending resistance decreases. Therefore, in the present embodiment, as shown in FIG. 5 (A), a clamp pin 14 having a thickness dimension that fits tightly (at least partially fits) into the center hole of the joint sleeve 8 is made of synthetic resin. It is made of a material and pressed into the joint sleeve 8 as shown by the arrow a in the figure. By the above press fitting, FIG.
(B), a synthetic resin clamp pin 14 (for convenience of reading,
(Shown with spots) are filled. This makes it difficult to bend even when an external bending force is applied to the joint sleeve 8 and increases the apparent rigidity, thereby reducing the risk of permanent deformation or breakage. Further, as a modification of the embodiment shown in FIG. 5, FIG.
When the tip of the clamp pin 14 is brought into contact with the end face of the linear antenna element 1 and pressed, the swaging ring 4 is pressed against the partition wall 8a and positioned in the axial direction, as shown in FIG.

FIG. 6 shows details of the step spring device 13 shown in FIG. 2B, and corresponds to the invention method of claim 5 and the invention device of claim 11.
(A) is an end view, (B) is a longitudinal sectional view taken along a plane different from the cut plane in FIG. 2, and (C) is inserted through the step spring device to achieve electrical conduction and sliding moderation. It is an external view of the member which receives. Tubular member 13a made of synthetic resin
A pair of inner bulges 13a ₁ , 13a _{2 which} are elastically engaged with the above-mentioned ring grooves 7b, 10b are formed on the inner peripheral surface of the inner rim so as to face each other in the yy direction.

A pair of leaf spring-shaped metal springs 13c are opposed to each other in the x-x direction orthogonal to the opposing direction y-y of the pair of inner bulges, and the longitudinal direction thereof is set in the z-z direction. It is mounted on the inner peripheral surface of the synthetic resin tubular portion 13a. Of the leaf spring-shaped metal spring 13c,
The cross-sectional shape along the xz plane appears in FIG. 2B described above. See FIG. 2 (B). When the linear antenna element 1 is contracted and slid to the left in the drawing to be in the storage position, the joint sleeve 8 is fitted into the step spring device 13 as shown in the drawing. Although illustration is omitted, when the linear antenna element 1 is extended and slid to the right in FIG. 2 to assume a posture of use, the antenna support sleeve 7 shown in FIG. It is moved and fits in the step spring device 13 shown in FIG.

Thus, the antenna support sleeve 7 and the joint sleeve 8 are placed in the step spring device 13.
Are inserted and removed alternately. Therefore, FIGS. 6A and 6B show the step spring device 13, and a part of the antenna support sleeve 7 inserted into and removed from the step spring device 13, and the helical antenna holder 10. Is shown in (C). However,
Since both of these members (7, 10) have the same outer peripheral surface shape near the ring groove, the appearance of one member is shown in FIG. The antenna support sleeve 7 or the helical antenna holder 10 is a step spring device 1
3, the inner bulging portions 13a ₁ and 13a _{2 of the} cylindrical portion 13a made of synthetic resin become ring grooves 7b or 10g.
b to give moderation to sliding. Since the above-mentioned engagement is the engagement between the metal antenna support sleeve 7 or the metal helical antenna holder and the inner bulging portion of the synthetic resin tubular portion 13a, the metal ring spring (see FIG. (Not shown) and the ring groove do not cause abrasion unlike the case where the ring groove is engaged. Since there is no fear of causing abrasion, the engagement can be performed with a strong elastic force so as to obtain a required moderation force. As described above, when the inner bulge is engaged with the ring groove, the metal spring 13 c is brought into contact with the antenna support sleeve 7 or the helical antenna holder 10. The above-described contact conduction is performed irrespective of the action of giving moderation to sliding. Therefore, there is no need to make a local contact. Since there is no need for local contact, a wide contact surface can be formed, and reliable and stable contact conduction can be obtained.

[0030]

As described above, according to the embodiment of the present invention, the configuration and function of the linear antenna element are made of a shape memory alloy. It is very difficult to form a rolling mark for press-fitting fixation by applying plastic working to the end, but there is no need to form a rolling mark, and the end of the linear antenna element is formed by caulking an annular member. Since an “apparent large-diameter portion” is formed, the “annular member having a larger diameter than the element wire of the linear antenna element” is fitted around the small-diameter portion of the center hole of the sleeve-like member. Can be. In this way, the linear antenna element and the annular member are fixed by caulking and the annular member is press-fitted and fixed to the small diameter portion of the center hole of the sleeve-like member. Is fixed to the sleeve-like member via an annular member. Further, since the large-diameter portion is formed concentrically with the small-diameter portion of the sleeve-shaped member center hole, the end of the tubular antenna cover externally fitted to the linear antenna element is inserted into the large-diameter portion. In this way, the outer peripheral surface of the linear antenna element is covered with the sleeve-like member and / or the antenna cover, and is not exposed to the outside air. In this way, the linear antenna element is shielded from the outside air by the sleeve-shaped member and the antenna cover, and is protected from chemical corrosion.

According to the second aspect of the present invention, an apparent large-diameter portion is formed near one end of the linear antenna element by fitting an annular member to the annular antenna element and caulking it.
The large diameter portion is press-fitted and fixed to the center hole of the antenna fitting terminal. Through the above steps, the linear antenna element is fixed to the antenna fitting terminal without requiring plastic working, and a linear antenna element with a fitting terminal is formed. Since plastic working is not required, there is no fear that processing technology will be difficult even if the linear antenna element is made of a shape memory alloy that is difficult to perform plastic working.

The outer peripheral surface of the antenna fitting terminal to which the linear antenna element is fixed as described above has a stepped shaft shape having large and small diameter portions, while the center hole of the sleeve-shaped member is also large and small. It is a stepped hole with a small diameter part. Because of such a relationship, the sleeve-shaped member and the antenna fitting terminal can be tightly fitted to each other and fixed by press-fitting (fixed fitting fixed), or they can be mutually fitted by contacting the stepped surfaces. It can also be positioned. With this configuration,
An annular member is caulked and fixed to the linear antenna element, the annular member is press-fitted and fixed to the antenna fitting terminal, and the antenna fitting terminal is press-fitted or fixed to the center hole of the sleeve-shaped member. In summary, even if the linear antenna element is made of a shape memory alloy, it is fixed to the sleeve-like member without requiring plastic working. Moreover,
As described above, the position of the antenna fitting terminal (to which the linear antenna element is fixed) fixed in the sleeve-shaped member can be appropriately set in design. Here, the meaning and significance of being able to be set appropriately are as follows: "The caulking position of the annular member with respect to the linear antenna element is limited to the vicinity of the end of the linear antenna element, and The press-fit fixing position for the fitting terminal is also
Although limited to the vicinity of the end face of the antenna fitting terminal (that is, the vicinity of the opening of the center hole), the position where the antenna fitting terminal is fixed in the center hole of the sleeve-like member is determined by the axis of the sleeve-like member. The direction of the center can be determined appropriately. "That's what it means. Thereby, the length dimension of the assembly combining the sleeve-shaped member and the linear antenna element is
The length of the linear antenna element can be made larger than the length thereof, and the amount of expensive shape memory alloy used can be reduced. Therefore, it is possible to reduce the manufacturing cost of an antenna device incorporating a linear antenna element made of a shape memory alloy.

According to the third aspect of the present invention, there is provided an antenna device of a type in which a linear antenna element made of a shape memory alloy is covered with a tubular antenna cover and is supported so as to be able to expand and contract with respect to a radio device case. At this time, the "antenna support sleeve for mechanically supporting the base end of the linear antenna element in the extended state and electrically connecting the linear antenna element to the radio circuit". The linear antenna element can be easily and reliably fixed and made conductive, and the gap between the antenna support sleeve and the antenna cover can be kept watertight to prevent rainwater from entering the case. In particular, a relatively small-diameter antenna fitting terminal that can be fitted into a relatively large-diameter antenna support sleeve is used, and the antenna fitting terminal is caulked to the linear antenna element. Therefore, compared to the case where a large-diameter sleeve is directly fitted to a thin (about φ1) linear antenna element and caulked, it can be caulked with a small force and securely. High processing quality reliability as parts.
Furthermore, the position at which the antenna fitting terminal to which the linear antenna element is caulked is press-fitted and fixed in the center hole of the antenna support sleeve is not particularly limited, and can be appropriately set. The required amount of the expensive shape memory alloy can be reduced. The meaning and significance of the above savings are as follows. That is, in an antenna device of a type that supports the linear antenna element so that the linear antenna element can expand and contract, the linear antenna element is fixed to the antenna support sleeve in order to support the base end of the linear antenna element in an extended state in a detachable manner. The antenna support sleeve is made of a metal material so as to also serve to electrically connect and conduct the linear antenna element to the radio circuit, and is a hard member that can be regarded as a rigid body in practical use. Therefore, it is not necessary to penetrate the linear antenna element made of a shape memory alloy over the entire length of the antenna support sleeve in the axial direction from the viewpoint of mechanical support and electrical contact conduction. For these reasons, the press-fitting and fixing position of the antenna fitting terminal with respect to the antenna supporting sleeve is appropriately selected, and the length of the overlapping portion between the antenna supporting sleeve and the linear antenna element with the antenna fitting terminal is necessary and sufficient. By doing so, it is possible to reduce the amount of expensive shape memory alloy wire used, without the risk of hindering performance.

According to the fourth aspect of the present invention, even if the linear antenna element is made of a shape memory alloy and it is difficult to perform plastic working, it is not necessary to apply plastic processing to the linear antenna element. It is easily and securely fixed and connected to the helical antenna element via the joint sleeve to form a composite antenna device composed of the linear antenna element and the helical antenna element. It can be mounted movably.
Further, a helical antenna holder is attached to one end of the joint sleeve, and the "annular member crimped to one end of the linear antenna element" is located near the other end of the joint sleeve. Is composed of an electrically insulating material, the linear antenna element and the helical antenna element are electrically insulated from each other, mechanically separated from each other, and mechanically connected to each other. . Such electrical and mechanical properties are extremely useful when constructing certain known antenna devices.

According to the fifth aspect of the present invention, there is no fear that the sleeve-shaped member to which the linear antenna element is fixed or the cylindrical member fixed to the sleeve-shaped member is worn out at an early stage. It is possible to ensure that the electrical circuit is brought into contact with the mechanical circuit, to give an appropriate response to the expansion and contraction sliding operation of the linear antenna element, and to maintain the extended and upright state and the contracted and retracted state. In the prior art, in general, a metal spring member (mainly a ring-shaped spring) provides electrical contact and continuity and obtains a frictional resistance and a sense of moderation during expansion and contraction, so that the elasticity of the metal spring member is increased. In order to obtain a desired frictional resistance and a sense of moderation, the metal spring member has a problem of causing scratches on the sleeve-shaped member. By sharing the role of contact conduction and frictional resistance and moderation due to the synthetic resin projection, electrical contact and conduction without scratches and mechanical sliding friction and moderation are both achieved. I got it.

When the method according to the sixth aspect is used together with the method according to the fourth aspect, a simple structure in which the space formed in the joint sleeve, which is a hollow member, is filled with a synthetic resin clamp pin. , The joint sleeve can be reinforced, and even if a user of the portable radiotelephone equipped with the linear antenna element applies a shocking external force such as accidentally dropping it, the portable radiotelephone is not easily damaged.
In addition, the press-fitting of the clamp pin also serves to complement the function of preventing the "annular member crimped to the linear antenna element and fitted in the joint sleeve" according to the present invention, so that the linear antenna element The fixed state becomes more certain.

According to the seventh aspect of the present invention, the advantage of the linear antenna element made of a shape memory alloy (they are flexible and do not bend and deform plastically or break due to breakage). Even if plastic working (formation of rolling marks) is not possible due to being made of a shape memory alloy without being damaged, an annular or cylindrical (including tubular) member is provided near the end of the linear antenna element. Is crimped, so that the crimping member is press-fitted and fixed to the center hole of the sleeve-shaped member, whereby the shape memory alloy wire antenna element is securely fixed to the sleeve-shaped member. As described above, as a result of the fact that it is not necessary to apply plastic working to the linear antenna element, the antenna manufacturer purchases a long wire made of a shape memory alloy (a so-called wire) from a special metal material manufacturer and desires it. And can be used as a linear antenna element. In this way, the fact that antenna manufacturers can easily manufacture linear antenna elements made of shape memory alloys with arbitrary length dimensions makes it possible to economically produce a small number of models and easily change the design at the antenna manufacturer. (Specifically, when the design department of the antenna manufacturer changes the design, the manufacturing department can adapt quickly, easily and without significant loss. As a result, the design department disturbs the manufacturing department. You can change the design without worrying about it).

According to the eighth aspect of the present invention, it is not necessary to subject the linear antenna element made of a shape memory alloy to plastic working, and the linear antenna element is mechanically fixed to the antenna supporting sleeve, and is electrically contacted and conductive. In addition, the "expensive wire for a linear antenna element made of a shape memory alloy" can be saved by about half the length of the antenna supporting sleeve. That is, since the cylindrical antenna fitting terminal crimped to the linear antenna element is press-fitted and fixed in the center hole of the antenna supporting sleeve, the linear antenna element is attached to the antenna supporting sleeve via the antenna fitting terminal. It is fitted and fitted together mechanically firmly,
Contact conduction is ensured electrically. Moreover, since the antenna support sleeve is added to the linear antenna element in this way, the length of the standing wave on the added antenna support sleeve is limited by the expensive shape memory alloy. Wire is saved.

According to the ninth aspect of the present invention, even if the linear antenna element is made of a shape memory alloy and is in a heat treatment state in which plastic processing cannot be performed, the linear antenna element is formed in a ring shape (cylindrical or tubular shape). It is necessary to apply plastic working to the linear antenna element with a simple configuration in which the member is crimped and the annular member is press-fitted and fixed in the center hole of the joint sleeve. Without
The linear antenna element and the helical antenna element can be mechanically concentrically connected and fixed. In addition, since the end of the tubular antenna cover externally fitted to the linear antenna element is fitted into the center hole of the joint sleeve, the abutting portion between the end of the antenna cover and the joint sleeve has an external appearance. It does not appear. That is, the linear antenna element is protected without being exposed at the joint between the antenna cover and the joint sleeve.

When the invention of claim 10 is used in combination with the device of invention of claim 9, even if the joint sleeve is relatively thin and relatively long, the space inside the center hole is filled with synthetic resin. In this state, the force withstanding the external bending force increases. Therefore, the joint sleeve fixed to the linear antenna element bends even if the portable radiotelephone equipped with the antenna device is dropped due to a user's negligence or an impact external force is applied by hitting against an external obstacle. There is no fear of plastic deformation or breakage, and excellent durability can be obtained.

According to the eleventh aspect of the present invention, since the leaf spring for sharing electrical contact and the projection made of synthetic resin for providing moderation are provided, the antenna support sleeve and the joint sleeve are damaged early. (Scratch), reliable contact conduction and proper moderation can be obtained. In other words, the metal leaf spring does not have the role of "engaging with the ring groove to provide moderation", so that reliable conduction can be obtained over a wide contact surface, and the synthetic resin projection does not damage the mating member. do not worry,
It is possible to engage with the ring groove with a required force, and by integrating the actions of both, it is possible to obtain reliable contact conduction and proper moderation.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view illustrating a fixing technique of a linear antenna element according to the present invention in comparison with a conventional technique, and FIG. 1 (A) illustrates an assembling process in a conventional example;
(B) shows an assembling process in one embodiment of the present invention and corresponds to the invention method of claim 1 and the invention device of claim 7, and (C) shows an assembling process in an embodiment different from the above. The figure shows a disassembled state and an assembled state, corresponding to the invention method of claim 2.

FIG. 2 shows an embodiment of the antenna device according to the present invention configured by applying the method of fixing the linear antenna element according to the present invention, and illustrates a portion near the center; FIG. 9 is a partial cross-sectional view of an antenna supporting sleeve fixed to an end portion for mechanically supporting the linear antenna element and electrically contacting and conducting, and corresponds to the method of the invention according to claim 3; FIG. 9 is a partial cross-sectional view of a helical antenna holder that is mechanically connected to and electrically connected to a helical antenna element fixed to a tip end of a strip antenna element, and corresponds to the invention method of claim 4.

FIG. 3 shows details of the vicinity of the antenna support sleeve shown in FIG. 2A and corresponds to the invention method of claim 3 and the invention device of claim 8, and FIG. Explanatory drawing in which spots for facilitating reading are added to the exploded sectional view drawn by drawing, and (B) is a sectional view in which a part is cut away in an assembled state, and reference numerals indicating processing portions are added. FIG.

FIG. 4 shows a joint sleeve 8, a linear antenna element 1, an antenna cover 3, a swaging ring 4, a helical antenna holder 10, and a helical antenna element from among the constituent members shown in FIG. 9 is a sectional view extracted and drawn, and corresponds to the invention method of claim 4 and the invention device of claim 9, wherein (A) is a helical antenna holder 10;
And (B) shows a state where it is disassembled with the joint sleeve 8, and FIG.

FIG. 5 is a partial cross-sectional view schematically illustrating the crankpin 14 and components related to the crankpin 14 extracted from the components illustrated in FIG. 2B. Corresponding to the invention method of the invention and the invention device of the claim 10,
(A) represents an assembly process for inserting a clamp pin,
(B) shows a state where the clamp pin is inserted.

FIG. 6 shows the step spring device 1 shown in FIG.
3A and 3B correspond to the invention method of claim 5 and the apparatus of invention of claim 11, wherein (A) is an end view, and (B) is a plane different from the cut plane in the above-mentioned figure. (C) is an external view of a member that is inserted into the step spring device and receives electrical conduction and sliding moderation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wire antenna element, 1 '... Assembly position of wire antenna element, 1a ... Trace of local rolling, 2, 2' ... Wire antenna fixing sleeve, 2a ... Antenna insertion hole, 2b, 2c ... Press-fit part 3, antenna cover, 4, 4 ', caulking ring, 5, ...
Wire antenna fixing sleeve, 5a ... antenna insertion hole, 5
b: press-fit portion, 6: antenna fitting terminal, 6a: antenna fitting terminal before assembly, 7: antenna support sleeve, 7a: caulking portion, 7b: ring groove, 7c: large diameter portion, 7d: small diameter portion, 8 Joint sleeve, 8a Male screw, 8b Partition wall, 8c Through hole for inserting linear antenna element, 9 Helical antenna element, 10 Helical antenna holder, 1
0a female thread, 10b ring groove, 10c central hole, 1
DESCRIPTION OF SYMBOLS 1 ... Antenna cap, 12 ... Cylindrical antenna guide, 1
3 Step spring device 13a Synthetic resin tubular member
13a _1, 13a ₂ ... inner surface bulging portion, 13b, 13c ... metal spring, 14 ... synthetic resin clamping pins, 15 ... radio case.

Claims (11)

[Claims] 1. A method of inserting a linear antenna element made of a shape memory alloy into a sleeve-like member and fixing the two members so that they do not slide with each other. A stepped center hole comprising a large diameter portion and a small diameter portion is formed, and one side in the axial direction of the center hole is configured to have a small diameter slidable with the linear antenna element. The other side in the axial direction of the center hole is configured to have a large diameter capable of fitting with the outer periphery of the tubular antenna cover, and the antenna cover is inserted and fitted into the large diameter portion of the sleeve-like member. After fitting or prior to fitting, in the vicinity of one end of the linear antenna element,
An annular member fitted with this is fitted and caulked, and the linear antenna element, in which the annular member is not caulked, is inserted from the small diameter side of the center hole of the sleeve-shaped member and inserted therethrough. And fixing the annular member to the sleeve by press-fitting the annular member into the vicinity of the opening end of the small diameter portion of the center hole. 2. A method of inserting a linear antenna element made of a shape memory alloy into a sleeve-like member and fixing the two members so that they do not slide with each other. A stepped center hole formed of a large diameter portion and a small diameter portion is formed, and one side with respect to the axial direction of the center hole can be fitted to the outer periphery of the tubular antenna cover of the linear antenna element. And a stepped center hole formed by forming a larger diameter portion on the other side, and a stepped portion having a large diameter portion and a small diameter portion separately from the sleeve-shaped member. Along with forming the shaft-like member, the stepped shaft-like member is provided with a center hole for fitting to the linear antenna element to form an antenna fitting terminal, and near one end of the linear antenna element, An annular member to be fitted with this is fitted and caulked, The linear antenna element is inserted into the antenna fitting terminal, the annular member is pressed into the vicinity of the opening of the center hole of the antenna fitting terminal, and the sliding of both members is fixed to each other to fit the fitting terminal. A small-diameter portion of the stepped shaft-like member forming the linear antenna element with the fitting terminal is formed with respect to a small-diameter portion formed in the center hole of the sleeve-like member. While being slidably fitted, the large-diameter portion of the stepped shaft portion of the antenna fitting terminal is fitted into the large-diameter portion of the center hole of the sleeve-shaped member and press-fitted and fixed,
Alternatively, the stepped center hole is brought into contact with the stepped surface with the stepped shaft-shaped member to act as a stopper,
A method of fixing a linear antenna element to a sleeve. 3. A linear antenna element made of a shape memory alloy, which is supported to be able to expand and contract with respect to the wireless device case and is mostly covered by a tubular antenna cover, A method of mechanically fixing and electrically connecting to an antenna support sleeve that can be fitted and detached from a penetrating and fixed cylindrical antenna guide, wherein one end of the linear antenna element is made of metal. An annular or metal cylindrical terminal member is fitted and caulked, and the terminal member caulked to the striated antenna element is press-fitted and fixed to the center hole of the antenna support sleeve, and externally attached to the striated antenna element. The fitted antenna cover is inserted into the center hole of the antenna support sleeve, and the antenna support sleeve is swaged toward the antenna cover, thereby obtaining an antenna. Thereby prevent relative sliding between the container support sleeve and the antenna cover, characterized in that retaining the water-tightness between the two, a method of fixing the filament antenna element to the sleeve. 4. A method for mounting and fixing the linear antenna element to a joint sleeve functioning as an adapter between a helical antenna holder for mounting and supporting the helical antenna element and a linear antenna element made of a shape memory alloy. In one end of the helical antenna holder, while forming a large-diameter tube substantially equal to the winding diameter of the helical antenna, the other end is formed in a cylindrical shape smaller than the winding diameter of the helical antenna, A female screw is formed on the inner peripheral surface of the small-diameter cylindrical portion, and a male screw that is screwed with the female screw is formed at one end of the joint sleeve, and the female screw is located near the other end of the joint sleeve. Provide a partition wall with a through hole through which the linear antenna element can be inserted, partitioning the inner space of the center hole of the joint sleeve, and at one end Inserting a linear antenna element having an annular member crimped into the through hole of the partition, pressing the annular member against the partition, and press-fitting and fixing the annular member into a joint sleeve. How to fix the antenna to the sleeve. 5. A tubular member which is slidably fitted to a sleeve-like member fixed to the shape-memory-alloy linear antenna element or a tubular member fixed to the sleeve-like member. An antenna guide is formed, and the cylindrical antenna guide is penetrated and fixed to the wall of the radio device case. A step spring device is previously incorporated in an inner peripheral portion of the cylindrical guide, and the step spring device is included therein. By providing a metal spring member elastically swelling to the peripheral side and a composite resin projection also elastically swelling to the inner peripheral side, a cylindrical antenna is provided via the metal spring member. 4. The electrical connection between the guide and the linear antenna element, and a frictional resistance and / or a moderation are given to the expansion and contraction sliding of the linear antenna element by the synthetic resin protrusion. Or 4 How to fix the filament antenna elements described in the sleeve. 6. A linear antenna element having an annular member caulked in advance at one end thereof is inserted into a through hole formed in a partition wall of the joint sleeve from the male screw side of the joint sleeve, and the annular member is pressed against the partition wall. After press-fitting and fixing the annular member into the center hole of the joint sleeve, a synthetic resin pin for clamping, which is a cylindrical member tightly fitted into the center hole of the joint sleeve, is attached to the joint sleeve. 5. The method of fixing a linear antenna element to a sleeve according to claim 4, wherein the hollow joint sleeve is press-fitted into a center hole from a male screw side to reinforce a bending resistance against an external force of the hollow joint sleeve. 7. An antenna device in which a linear antenna element made of a shape memory alloy is slidably supported on a wireless device case, and a sleeve-like member is fixed to at least one end of the linear antenna element. In at least a part of the sleeve-shaped member, a center hole having a hole diameter slidably fitted to the linear antenna element is provided, and the center hole having a hole diameter fitted to the linear antenna is formed by a sleeve. An annular or cylindrical member is externally fitted and caulked near one end of the shape memory alloy linear antenna element, and the linear antenna element is open at at least one end surface of the linear antenna element. Is inserted into the center hole of the sleeve-shaped member, and an annular or cylindrical member caulked to the linear antenna element is located near the opening end of the center hole of the sleeve-shaped member. Characterized in that is input fixed relative sliding of both members is prevented, the antenna device is fixed filar antenna element to the sleeve. 8. An antenna device having a linear antenna element made of a shape memory alloy which is supported so as to be extendable and slidable with respect to a case of a wireless device, wherein when the linear antenna element is extended, An antenna support sleeve to support the radio case,
In the antenna element fixed to one end of the linear antenna element, a center hole of the antenna support sleeve has a stepped shape having a large diameter portion and a small diameter portion, and the linear antenna element A cylindrical antenna fitting terminal is crimped to one end of the antenna supporting sleeve, and the antenna fitting terminal is press-fitted into a small diameter portion of the antenna support sleeve center hole and fixed. A linear antenna element, characterized in that an end of a tubular antenna cover externally fitted to a linear antenna element is inserted, and an end of the antenna support sleeve is caulked toward the antenna cover. An antenna device in which is fixed to a sleeve. 9. An antenna device in which a helical antenna element is connected to a linear antenna element made of a shape memory alloy via a sleeve-shaped joint member, wherein one end of a joint sleeve which is a synthetic resin tubular member is provided. A threaded hole is formed at the other end, and a partition wall having a through hole through which a linear antenna element can be inserted is provided near the other end by being separated from the other end. An annular, cylindrical, or tubular member having an outer diameter that fits snugly into the center hole of the joint sleeve is caulked near one end of the antenna, and is a linear antenna inserted through the through hole of the partition wall. An annular or cylindrical member crimped to the element is abutted and positioned on the male screw side surface of the partition wall and is press-fitted and fixed in the joint sleeve center hole, First, a helical antenna holder is provided in which a large-diameter cylindrical portion that fits and supports the helical antenna element and a small-diameter cylindrical portion that fits outside the joint sleeve are concentrically and integrally provided. A male screw of the joint sleeve is screwed and fixed to a female screw formed on an inner peripheral surface of the small-diameter cylindrical portion of the helical antenna holder, and a center hole near an end opposite to the male screw of the joint sleeve. An antenna device in which a linear antenna element is fixed to a sleeve, wherein an end of a tubular antenna cover externally fitted to the linear antenna element is fitted therein. 10. The wire according to claim 9, wherein a clamp pin, which is a cylindrical member made of synthetic resin, is press-fitted and fixed in a central hole of the joint sleeve made of a metal material. An antenna device in which a strip antenna element is fixed to a sleeve. 11. A ring-shaped groove is formed on an outer peripheral surface of the antenna support sleeve fixed to the linear antenna element made of shape memory alloy or a joint sleeve similarly fixed to the linear antenna element. A cylindrical antenna guide member slidably fitted to the antenna supporting sleeve or the joint sleeve is fixedly penetrated to the wall of the radio device case to guide the expansion and contraction sliding of the linear antenna element. And a step spring device is fitted on the inner periphery of the cylindrical antenna guide member, and the step spring device includes:
(A) a leaf-spring-shaped metal spring acting as an electrical contact that slides on the antenna supporting sleeve or the joint sleeve and electrically conducts; and (b) a ring-shaped groove of the antenna supporting sleeve or the joint sleeve. By elastically engaging and disengaging
10. The linear antenna element according to claim 8 or 9, further comprising: a synthetic resin projection for providing a moderation to the axial direction sliding of the antenna support sleeve or the joint sleeve. Antenna device fixed to sleeve.