KR100319656B1 - Antenna and method of manufacturing the same - Google Patents

Abstract

In the antenna 10 of the present invention, the conductive member 12 is an insulating member 13 in which the tip of the whip antenna element 11 and the proximal end of the conductive sleeve 12 face each other at a predetermined first separation distance L1. A specific second separation distance () at the standby position P1 on the), the distal end of the whip antenna element 11 and the proximal end of the conductive sleeve 12 are smaller than the first separation distance L1 at the standby position P1. It is fitted to the insulating member 13 so as to be movable between the actual mounting position P2 on the insulating member 13 which faces L2) and is opposite to the helical antenna element 15 at the actual mounting position P2. By being connected, it is characterized in that it is formed to be fixed on the actual mounting position (P2).

Description

ANTENNA AND METHOD OF MANUFACTURING THE SAME

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna attached to a portable transceiver such as a cellular phone or a PHS terminal. In particular, the present invention has a structure in which a helical antenna element is mounted on the top of a whip antenna element, and the antenna is pulled out of the transceiver case. The present invention relates to an antenna formed so that the helical antenna element exhibits a transmission / reception function when the element exhibits a transmission / reception function and the antenna is introduced into the transceiver case.

As an antenna of this type in the prior art, for example, an antenna disclosed in Japanese Patent Publication No. 2646505 is known.

Fig. 12 is a diagram showing the configuration of main parts of a conventional antenna having a configuration substantially the same as that of the above known antenna, in which the left half surface is cut off before the helical antenna element is wound. In this antenna 100, the whip antenna element 101 and the hollow conductive sleeve 102 are fixed by integral molding of the insulating member 103. In this case, the conductive sleeve 102 is fitted into a relatively small portion of the central portion of the insulating member 103 so as not to be movable in the axial direction. In this way, the whip antenna element 101 and the conductive sleeve 102 are fixed in a state where their relative positional relationship is constant. The outer circumferential surface of the whip antenna element 101 is covered by an insulating tube 101a except for both ends thereof. The distal end portion of the insulating member 103 is a circumferential portion 104 having a relatively large diameter.

As shown in FIG. 13, the helical antenna element 105 is wound around the relatively large circumferential portion 104 formed at the distal end portion of the insulating member 103. One end of the helical antenna element 105 is electrically connected to a flange portion 102a formed at the tip of the conductive sleeve 102.

The conventional antenna 100 described above has some problems as shown below.

(1) In general, there is a variation in the outer diameter of the conductive sleeve 102 due to manufacturing errors. For this reason, when the shaping | molding process of the insulation member 103 is performed using a shaping | molding die, a part of molten insulation shaping | molding material will leak to the outer side of the conductive sleeve 102, and what is called a "burr" (thorn or scale) Etc.) may occur.

14 is a diagram illustrating an example thereof. As shown in the figure, a part of the insulating member 103 is pushed out to the outer circumference of the conductive sleeve 102 to form a so-called 'burr' 106. This 'burr' 106 causes a poor appearance and is also caught by a holding mechanism for holding the antenna 100 in a slidable manner when the antenna 100 is inserted into and separated from the transceiver case. In some cases, malfunction occurs.

(2) There is a mechanical weakness at the boundary B between the whip antenna element 101 and the conductive sleeve 102. That is, the metal member is not interposed in the boundary part B of the whip antenna element 101 and the conductive sleeve 102, and this part is formed only by the insulating member 103. As shown in FIG.

Therefore, as shown by arrow A in FIG. 15, when a lateral external force is applied to the antenna rod that intersects the axial center, the boundary B between the whip antenna element 101 and the conductive sleeve 102 is applied. Stress is concentrated in the insulating member 103, and this portion may be damaged as indicated by reference numeral C in FIG.

In general, it is preferable to use a nylon resin having flexibility as the insulating member 103 and to perform a humidification treatment on the nylon resin to ensure the flexibility so that such breakage does not occur. It is trying. However, as the antenna of this kind, the conductive sleeve 102 is fitted and fixed so as to surround almost the entire central portion of the insulating member 103 as shown, so that the humidification treatment is performed throughout the insulating member 103. It is difficult to run sufficiently across the board, resulting in 'uneven conditions' for the humidification state. As a result, damage is likely to occur near the proximal end of the boundary portion B, particularly the conductive sleeve 102, and the mechanical weakness of the boundary portion B cannot be compensated for.

An object of the present invention is that the 'burr' due to the molding process is not substantially generated, there is no fear of causing a defect in appearance, and there is no fear of an operation failure occurring during insertion and detachment operation on the transceiver case. It is an object of the present invention to provide an antenna having a merit such that damage or breakage does not occur even when a strong external force in the transverse direction is applied to the antenna rod, and a method of manufacturing the same.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject and achieve the objective, the antenna of this invention and its manufacturing method are comprised as follows. Moreover, about the structure which is a characteristic of this invention except the following, it becomes clear in an Example.

(1) The antenna of the present invention is integrated such that the whip antenna element and the helical antenna element having the same electrical length are arranged in a straight line through the insulating member, and the whip antenna element is connected to the conductive stopper when drawn out of the transceiver case. The conductive sleeve is connected to the feeder of the transceiver via the conductive sleeve when the helical antenna element is connected to the feeder of the transceiver and is introduced into the transceiver case. A proximal end of the conductive sleeve, the standby position on the insulating member opposed to the predetermined first spacing distance, the front end portion of the whip antenna element and the proximal end of the conductive sleeve is smaller than the first separation distance at the standby position Facing away from the second separation of Is fitted to the insulating member so as to be movable between the actual mounting position on the insulating member, and is connected to the helical antenna element at the actual mounting position so as to be fixed on the actual mounting position. have.

(2) The method for manufacturing an antenna of the present invention includes a first step of arranging a whip antenna element and a conductive sleeve at a predetermined first distance in a straight line, and performing insert molding with an insulating molding material as the insertion member; And conducting the flexible process to the insulating member formed by the first process, and moving the conductive sleeve toward the whip antenna element after the flexible process by the second process is performed. A third step of positioning the proximal end of the sleeve and the distal end of the whip antenna element so as to face a specific second separation distance; and a helical antenna element defined such that an electric length is equal to the whip antenna element via the insulating member. A fourth step of mounting on the axial center extension line of the whip antenna element, and by the fourth step And a fifth process of connecting the attached helical antenna element and the conductive sleeve positioned in the third process.

1 is a view showing a schematic configuration of an antenna according to a first embodiment of the present invention, a perspective view showing a mounted state with respect to a case of a mobile phone,

FIG. 2 is a diagram showing a schematic configuration of an antenna according to a first embodiment of the present invention, which is a side view of an antenna unit;

3, 4 and 5 are schematic process diagrams showing the first half of the antenna manufacturing process according to the first embodiment of the present invention;

6 and 7 are schematic process diagrams showing the second half of the antenna manufacturing process according to the first embodiment of the present invention;

8 and 9 are views showing the effect of the antenna (no burr occurrence) according to the first embodiment of the present invention;

10 and 11 are views showing the effect of the antenna (flexible antenna) according to the first embodiment of the present invention,

12 is a view showing the configuration of the main portion of the antenna according to the prior art, a side view showing the state before the helical antenna element is wound and the left half surface is cut,

FIG. 13 is a view showing the configuration of a main part of an antenna according to the prior art, and is a partial side view showing a state after the helical antenna element is wound;

14 is a view for explaining the problem (the occurrence of 'burr') of the antenna according to the prior art,

Fig. 15 and Fig. 16 illustrate problems of antennas (breakage of antennas) according to the prior art.

Explanation of symbols for the main parts of the drawings

11 whip antenna element 12 conductive sleeve

13: insulation member 15: helical antenna element

17: conductive stopper 20: portable transceiver

First embodiment

1 and 2 show a schematic configuration of an antenna according to a first embodiment of the present invention. FIG. 1 is a perspective view showing a state in which an antenna is mounted with respect to a case of a cellular phone, and FIG. 2 is an antenna It is a side view of a group.

As shown in Fig. 1 and Fig. 2, the antenna 10 is a holding mechanism (e.g.) for the case 21 of the cellular phone 20 that uses radio waves such as 800 MHz microwave or 1.5 GHz microwave. It is attached in a state capable of being inserted and detached as shown by the arrow Z via the feeder 22).

Each of the antennas 10 is such that the whip antenna element 11 and the helical antenna element 15 having the same electric length are arranged in a straight line through the insulating member 13 so as to be able to independently transmit and receive the microwaves or the microwaves. It is integrated. The whip antenna element 11 is covered with an insulating tube 11a except for both ends thereof.

The reason why the electric lengths of the whipped antenna element 11 and the helical antenna element 15 are the same as described above is that the whip antenna element 11 having a relatively long actual size that operates when the antenna 10 is drawn out, This is to obtain that the helical antenna element 15 having a relatively short actual size operating when the antenna 10 is drawn in operates at approximately the same gain for propagation in the same frequency band. The electric length is mainly determined by the length of the actual size of the antenna element. In addition, the electric length of the helical antenna element 15 is mainly determined by the diameter of the coil, the number of windings, the winding pitch, and the like. Therefore, the electric length of the whip antenna element 11 and the electric length of the helical antenna element 15 can be made the same by adjusting and setting these values in advance at the time of manufacture. The radiation pattern of the helical antenna element 15 is slightly downward while the radiation pattern of the whipped antenna element 11 is substantially horizontal, and the helical antenna element 15 has a radiation pattern that is slightly downward. It is necessary to consider that the sensitivity is lowered by about 1 dB. The mobile telephone 20 is often stored in, for example, a pocket of clothes when not in use. In this case, the antenna 10 is inserted into the telephone case 21 so that the whip antenna element 11 having a relatively long dimension does not interfere with the storage and does not cause damage to the element. ) Is stored as described above, the conductive sleeve 12 connected to the proximal end of the helical antenna element 15 is a power contact (not shown) of the holding mechanism 22. To conduct with Only this helical antenna element 15 is fed, and the whip antenna element 11 is not fed. In this case, therefore, only the transmission / reception of the helical antenna element 15 (mainly reception of the incoming signal) becomes possible. In addition, when the cellular phone 20 is used, the cellular phone 20 stored in the pocket of the garment or the like is removed and called. After dialing the telephone number of the party to be called, the handset of the telephone 20 is put on the ear to make a call. In this case, the antenna 10 is sufficiently drawn out to the outside of the phone case 21 so that the antenna 10 is covered by the user's head so that transmission and reception of radio waves are not hindered. The antenna 10 is as described above. In the extended state, the conductive stopper 17 attached to the base end of the whip antenna element 11 conducts with a power supply contactor (not shown) provided inside the holding mechanism 22. For this reason, only the whip antenna element 11 is fed, and the helical antenna element 15 is not fed. Therefore, in this case, good transmission / reception (mainly a call with the other party) by the whip antenna element 11 is possible.

3, 4 and 5 are schematic process diagrams showing the first half of the manufacturing process of the antenna according to the first embodiment of the present invention, and FIGS. 6 and 7 are the manufacture of the antenna according to the first embodiment of the present invention. A schematic process diagram showing the second half of the process. 3 and 4 are side views showing the left half surface of the main part, and FIG. 5 is a partial side view. Hereinafter, each process is demonstrated sequentially.

1st process

As shown in FIG. 3, the whip antenna element 11 and the conductive sleeve 12 are arrange | positioned at a predetermined distance L1 in a straight line, and these are inserted into an insulation molding material, such as nylon resin, as an insertion member, for example. Insert molding is performed. Reference numeral 13 denotes an insulating member molded by the first step. Reference numeral 14 is a circumferential portion formed at the tip of the insulating member 13 and is formed on the axis center extension line of the whip antenna element 11.

Here, the conductive sleeve 12 has a distance P1 from the standby position P1 (the upper end of the circumferential part 14) (the upper end in the drawing) on the insulating member 13 to the proximal end (the lower end in the drawing) of the conductive sleeve 12. Location].

2nd process

A softening treatment is performed on the insulating member 13 formed by the first step. That is, when nylon resin is used as an insulation molding material, a humidification process is performed by boiling for about 1 hour in the water heated about 100 degreeC, for example. Moreover, you may use another method as this humidification process, for example, the method of leaving to stand in a high temperature and humidity atmosphere for a long time.

3rd process

After the softening treatment by the second process is performed, as shown by the arrow F in FIG. 3, the conductive sleeve 12 is moved toward the whip antenna element 11 by a distance corresponding to the gap G. . In doing so, the conductive sleeve 12 is connected to the proximal end of the conductive sleeve 12 from the actual mounting position P2 (the top of the circumference 14 (the upper end in the figure) on the insulating member 13 as shown in FIG. Position at the bottom) in the drawing). At this time, the distance between the proximal end of the conductive sleeve 12 and the distal end of the whip antenna element 11 is a predetermined second separation distance L2.

Here, the specific second separation distance L2 is a minimum insulation distance at which the whip antenna element 11 and the helical antenna element 15 may independently transmit and receive functions.

4th process

A helical antenna element 15 whose electric length is equal to the whip antenna element 11 is wound around the outer circumference of the circumferential portion 14 formed at the tip of the insulating member 13 as shown in FIG. .

5th process

By the fourth process, one end (lower end in the drawing) of the helical antenna element 15 wound and fixed to the outer circumference of the circumferential portion 14 and in the state positioned at the actual mounting position P2 in the third process The flange portion 12a of the conductive sleeve 12 is connected by, for example, soldering or spot welding. In this way, the helical antenna element 15 and the conductive sleeve 12 are electrically and mechanically integrated together, and the conductive sleeve 12 is fixed in this position.

6th process

As shown in FIG. 6, the conductive stopper 17 is fitted to the proximal end of the whip antenna element 11 after fitting the retaining mechanism 22 in the unitary state before being attached to the case 21 from the proximal end of the whip antenna element 11. Attach).

7th process

As shown in FIG. 7, the outer periphery of the helical antenna element 15 is covered with a covering member 16 made of ABS resin or the like to provide an outer appearance. The holding mechanism 22 is attached to the antenna attaching part of the case 21 by, for example, screwing means. In this way, as described with reference to FIG. 1, the antenna 10 is mounted in a detachable state with respect to the case 21.

Variant

The antenna shown in the first embodiment described above includes the following modifications.

Mechanical coupling and electrical connection between the conductive sleeve 12 and the helical antenna element 15 are carried out by separate means, respectively.

Feature points in the example

[1] The antenna shown in the embodiment is integrated so that the whip antenna element 11 and the helical antenna element 15 having the same electrical length are arranged in a straight line through the insulating member 13, and the transceiver case 21 When the whipped antenna element 11 conducts to the power supply part of the transceiver 20 via the conductive stopper 17 when drawn out, and is drawn into the transceiver case 21, the helical antenna element ( 15 is conductive with the power supply of the transceiver 20 via the conductive sleeve 12, the conductive sleeve 12, the distal end of the whip antenna element 11 and the proximal end of the conductive sleeve 12 The standby position P1 on the insulating member 13 facing the predetermined first separation distance L1, the tip of the whip antenna element 11 and the proximal end of the conductive sleeve 12 are located at the standby position ( To P1) It is fitted to the insulating member 13 so as to be movable between the actual mounting positions P2 on the insulating member 13 opposed to each other with a specific second separation distance L2 smaller than the first separation distance L1. And is connected to the helical antenna element 15 at the actual mounting position P2, thereby being fixed on the actual mounting position P2.

In the antenna 10, injection molding of the insulating molding material 13 is performed as shown in FIG. 8, and positioning of the conductive sleeve 12 is performed as shown in FIG. The occurrence of 'is suppressed. That is, at the time of shaping | molding of the insulating member 13, the shaping | molding die 30 is arrange | positioned as shown by the dashed-dotted line in FIG. In addition, the conductive sleeve 12 has one end surface (left end face in the drawing) of the annular protrusion 31 whose proximal end (one end of the side close to the whip antenna element 11) protrudes to the inner surface of the molding die 30. It is arranged to be in close contact with the. With this arrangement, the conductive sleeve 12 is positioned at the standby position P1 and the proximal end opening of the conductive sleeve 12 is covered by the annular projection 31 of the molding die 30. It seems to be a state.

Since injection molding of the insulating molding material 13 is performed in this state, the insulating molding material 13 to be injected is formed at the base end of the conductive sleeve 12 and at one end surface of the annular protrusion 31 of the molding die 30. The possibility of leaking through the gap to the outer surface of the conductive sleeve 12 is extremely low. Even if there is a slight leakage, the conductive sleeve 12 is moved from the standby position P1 shown in FIG. 8 to the actual mounting position P2 shown in FIG. The 'burr' generated by this peels off and removes as the conductive sleeve 12 moves. By doing so, the 'burr' does not substantially occur in the portion M of FIG. 9, and there is no fear of appearance defect or malfunction at the time of antenna insertion separation operation.

Further, the softening treatment, for example, the humidification treatment, on the insulating member 13 is performed in the state of FIG. 8 in which the conductive sleeve 12 is located at the standby position P1, that is, the conductive sleeve 12 and the whip antenna element 11. The space can be executed in a state in which the space is enlarged by a distance G corresponding to the width of the annular protrusion 31. Therefore, the conductive sleeve 12 is located at the actual mounting position P2 as shown in FIG. 9, so that the conductive sleeve 12 is adjacent to the area of the insulating member 13 covered by the conductive sleeve 12, that is, the boundary B. FIG. The softening treatment is also sufficiently performed on the region of the insulating member 13.

In this way, as indicated by the arrow A in FIG. 10, an external force in the transverse direction intersecting the axial center is applied to the antenna 10 to the boundary B between the conductive sleeve 12 and the whip antenna element 11. Even if stress is concentrated on the existing insulating member 13, since the boundary B and its periphery are sufficiently flexible, the antenna 10 is curved in the N portion as shown by the dashed-dotted line in FIG. . Therefore, breakage at least in the N portion, that is, the boundary portion B, is prevented. When the external force is removed, the antenna 10 returns to its original state.

[2] The antenna shown in the embodiment is the antenna according to the above [1], wherein the whip antenna element 11 and the helical antenna element 15 are antenna elements capable of transmitting and receiving microwaves and microwaves, respectively, and include a portable transceiver ( 20).

In the antenna 10, since it is preferable in appearance, excellent in operability, and strong in the external force in the lateral direction, a portable transceiver 20 capable of almost satisfying a requirement as a portable device is provided. can do.

[3] The antenna shown in the embodiment is the antenna according to [1], wherein the second separation distance L2 is such that the whip antenna element 11 and the helical antenna element 15 each independently transmit and receive functions. It has a minimum insulation distance that can be.

In the antenna 10, the whip antenna element 11 and the helical antenna element 15 can each independently perform transmission and reception functions, and a small antenna having a minimum required length can be obtained.

[4] In the method for manufacturing an antenna shown in the embodiment, the whip antenna element 11 and the conductive sleeve 12 are arranged in a straight line at a predetermined first distance L1, and the insulating molding material 13 is used as an insertion member. After the first step of carrying out the insert molding, the second step of subjecting the insulating member 13 formed by the first step to the softening treatment, and the softening treatment by the second step, Move the conductive sleeve 12 toward the whip antenna element 11 so that the proximal end of the conductive sleeve 12 and the tip of the whip antenna element 11 face each other at a specific second separation distance L2. The third step of determining and the helical antenna element 15, which is determined such that the electrical length is the same as the whip antenna element 11, are formed on the axis center extension line of the whip antenna element 11 via the insulating member 13. chapter And a fifth step of connecting the helical antenna element 15 mounted by the fourth step and the conductive sleeve 12 positioned by the third step. .

In the manufacturing method of the said antenna 10, since the manufacturing order is clearly specified, the antenna 10 shown in the said [1] embodiment can be manufactured more reliably.

[5] The method for manufacturing an antenna shown in the embodiment is the method for manufacturing an antenna according to the above [4], wherein the insulating molding material 13 is a nylon resin, and the softening treatment is performed by humidifying the nylon resin. Characterized in that.

In the manufacturing method of the said antenna 10, since the material of the insulating molding material 13 is specified, implementation becomes easy.

[6] The antenna shown in the embodiment and a method of manufacturing the same include a combination of the antennas described in Examples [1] to [5] and a method of manufacturing the same.

According to the present invention, the 'burr' due to the molding process is not substantially generated, there is no fear of causing a defect in appearance, and there is no fear of malfunction in the insertion and disconnection operation on the transceiver case, and also in the antenna rod. Even if a strong external force in the lateral direction is applied, an antenna having an advantage such that there is no risk of damage or breakage or the like can be provided, and a manufacturing method thereof.

Claims (5)

The whip antenna element 11 and the helical antenna element 15 having the same electrical length are integrated so as to be arranged in a straight line via the insulating member 13, and when the lead antenna element 21 is drawn out of the transceiver case 21, the whip antenna When the element 11 conducts with the feeder of the transceiver 20 via the conductive stopper 17 and is introduced into the transceiver case 21, the helical antenna element 15 is connected to the conductive sleeve 12. In the antenna which is connected to the feeder of the transceiver 20 via The conductive sleeve 12 has a standby position on the insulating member 13 in which the tip end of the whip antenna element 11 and the proximal end of the conductive sleeve 12 face each other at a predetermined first separation distance L1 ( P1) and a specific second separation distance L2 at which the tip end of the whip antenna element 11 and the base end of the conductive sleeve 12 are smaller than the first separation distance L1 at the standby position P1. It is fitted to the insulating member 13 so as to be movable between the actual mounting position P2 of the insulating member 13 opposed to each other, and the helical antenna element 15 at the actual mounting position P2. It is formed so as to be fixed on the actual mounting position (P2) by being connected antenna. The method of claim 1, The whip antenna element 11 and the helical antenna element 15 are antenna elements capable of transmitting and receiving microwaves and microwaves, respectively, and are attached to the portable transceiver 20. antenna. The method of claim 1, The second separation distance (L2) is characterized in that the whip antenna element 11 and the helical antenna element 15 is a minimum insulation distance that can each independently transmit and receive function antenna. In the antenna manufacturing method, A first step of arranging the whip antenna element 11 and the conductive sleeve 12 in a straight line at a predetermined first spacing distance L1, and performing insert molding with the insulating molding material 13 as the insert member. and, A second step of performing a softening treatment on the insulating member 13 formed by the first step, After the flexible process by the second process is performed, the proximal end of the conductive sleeve 12 and the distal end of the whip antenna element 11 are moved by moving the conductive sleeve 12 toward the whip antenna element 11. 3rd process of positioning so that it may oppose a 2nd separation distance L2, A fourth step of mounting the helical antenna element 15 such that the electric length is equal to the whip antenna element 11 on the axis center extension line of the whip antenna element 11 via the insulating member 13; And a fifth process of connecting the helical antenna element 15 mounted by the fourth process and the conductive sleeve 12 positioned in the third process. Antenna manufacturing method. The method of claim 4, wherein The insulating molding material 13 is a nylon resin, and the softening treatment is performed by humidifying the nylon resin. Antenna manufacturing method.