KR101108923B1 - Antenna for mobile phone - Google Patents

Abstract

The present invention relates to an antenna for a terminal.

The antenna for a terminal according to the present invention is configured to be able to extend and receive in a longitudinal direction by fitting pipe members having different diameters to each other, and an expansion pipe is formed at a lower end of each pipe member except for the lowermost pipe member. C-shaped spring is coupled to the upper side of the expansion pipe, the upper side of the C-shaped spring, and also formed on the circumferential surface of each pipe member, a stopper groove formed to receive and hook one side of the C-shaped spring Multistage pipe; And a wire member accommodated in the multi-stage pipe to transmit and receive a signal, and an expansion pipe portion is formed at a lower end thereof, and a C-shaped spring is coupled to an upper side of the expansion pipe, and the C-shaped spring is fixed to the C-shaped spring. It includes; wire member having a stopper ring is formed integrally with the outer peripheral surface of the protrusion.

Antenna for terminal, multi-stage pipe, C-shaped spring, wire member

Description

Antenna for terminal {ANTENNA FOR MOBILE PHONE}

The present invention relates to an antenna for a terminal.

Recently, portable terminals have been developed and distributed with functions capable of receiving digital multimedia broadcasts as multimedia is accelerated in addition to functions such as voice communication or text messages. Such digital multimedia broadcasting is divided into satellite digital multimedia broadcasting and terrestrial digital multimedia broadcasting. Terrestrial digital multimedia broadcasting, in particular, terrestrial digital multimedia broadcasting is a receiver that travels at a high speed of 200 km per hour through a VHF band having a bandwidth of about 1.5 MHz. In addition, there is an advantage in that it can receive video CD quality and CD quality stereo sound quality.

In addition, terrestrial digital multimedia broadcasting has the advantage of transmitting streams such as video compressed data and audio compressed data through the stream mode defined in the European Digital Audio Broadcating (DAB) standard. Due to the advantages that are not imposed, the situation is gradually spreading. However, because terrestrial digital multimedia broadcasting uses VHF-class channels, antennas mounted on terminals such as mobile phones and personal digital assistants have a problem that the reception rate of terrestrial DMB is lowered. In order to achieve this, a long antenna such as a multi-stage antenna was required. In particular, since the multi-stage sleeve and the wire member, which serve as radio waves, play a role of increasing the reception rate as the length thereof increases, researches to increase the length of the antenna have been actively conducted. However, when using a long antenna, wear occurs at repeated use of the sleeve and the wire member at the portion where the sleeve of the multi-stage is coupled and at the portion where the sleeve and the wire member are coupled to the upper portion. There was a problem that the life is shortened.

In addition, the friction occurs during repeated reciprocating movement of the sleeve and the wire member has a problem that the sliding performance is lowered.

Therefore, in order to solve the above problems, the present invention is composed of a multi-stage, by forming a stopper groove that can be accommodated by receiving one side of the spring on the circumferential surface of the pipe member formed with an expansion pipe in the lower side, It is an object to provide a terminal antenna which can improve the sliding performance of a pipe member and to reduce manufacturing cost by forming.

In addition, the present invention has a stopper groove formed at a predetermined point on the upper side of the pipe member, which is composed of multiple stages and has an enlarged pipe portion on the lower side thereof, and on one point of the other surface of the friction piece where one surface is in contact with the inner wall surface of each pipe member. It is an object of the present invention to provide a terminal antenna which can improve the sliding performance of the pipe member and reduce the manufacturing cost by forming a pipe member into which the formed convex stopper is fitted.

In addition, the present invention is formed by forming a pipe member having a multi-stage, an elastic spring coupled to the elastic member for elastically supporting the pipe member by the elastic force during expansion and storage of the pipe member on the upper side of the pipe member formed with an expansion pipe in the lower side It is an object of the present invention to provide an antenna for a terminal that can improve the sliding performance of a pipe member and can reduce a manufacturing cost.

In addition, in the present invention, the expansion pipe is formed at the lower end of the wire member, the C-shaped spring is coupled to the upper side of the expansion pipe, the stopper for fixing the C-shaped spring on the outer circumferential surface of the pipe member, the upper side of the C-shaped spring It is an object of the present invention to provide an antenna for a terminal with improved sliding performance of a wire member by forming a ring.

An antenna for a terminal according to an embodiment of the present invention is configured to extend and receive in a longitudinal direction by fitting pipe members having different diameters to each other, and extends to a lower end of each pipe member except for the lowermost pipe member. A tubular part is formed, the C-shaped spring is coupled to the upper side of the expansion pipe, the upper side of the C-shaped spring, and can receive and hang one side of the C-shaped spring on the circumferential surface of each pipe member. A multi-stage pipe having a stopper groove and a wire member accommodated in the multi-stage pipe to transmit and receive a signal, and an expansion pipe portion is formed at a lower end thereof, and a C-shaped spring is coupled to an upper side of the expansion pipe, and the C-shaped spring above the C-shaped spring. And a wire member having a stopper ring which is integrally formed by protruding the outer circumferential surface of the wire member. .
The C-shaped spring may be made of beryllium copper.
The antenna for a terminal according to another embodiment of the present invention is configured to extend and receive the pipe members having different diameters from each other in the longitudinal direction thereof, and to extend to the bottom of each pipe member except the lowermost pipe member. A multi-stage pipe in which a pipe part is formed, and a stopper groove is formed at a predetermined point on the upper side of the expansion pipe part, and the convex stopper is formed on a point of the surface of the friction piece in contact with the inner wall surface of each pipe member; A wire member accommodated in the multi-stage pipe for transmitting and receiving a signal, and an extension pipe portion is formed at a lower end thereof, and a C-shaped spring is coupled to an upper side of the extension pipe, and the C-shaped spring is fixed to the C-shaped spring and fixed to the wire member. An outer circumferential surface includes a wire member having a stopper ring protrudingly formed integrally.
The friction piece may comprise a plastic material.
The antenna for a terminal according to another embodiment of the present invention is configured to extend and receive the pipe members having different diameters from each other in the longitudinal direction thereof, and to the lower end of each pipe member except the lowermost pipe member. An elastic pipe is formed, and the elastic member supports the pipe member by elastic force when the pipe member is stretched and received at the upper side of the expansion pipe, and is formed in a coil shape surrounding the pipe member to have a compression section therein. A multistage pipe coupled with a spring, the wire member is received in the multistage pipe to transmit and receive signals.
The upper end of each of the multi-stage pipe may be formed with a locking step bent in the inner radial direction so that the upper pipe member is stretched in the longitudinal direction.
The wire member has an expansion pipe portion formed at a lower end thereof, and a C-shaped spring is coupled to the upper portion of the expansion pipe, and the C-shaped spring is fixed to the upper side of the C-shaped spring, and an outer circumferential surface of the wire member is protruded and formed integrally. It may have a stopper ring.
According to still another embodiment of the present invention, a multi-stage pipe is configured to sandwich pipe members having different diameters from each other and extend and receive in a longitudinal direction thereof, and a wire member accommodated in the multi-stage pipe to transmit and receive a signal, A pipe part is formed, and the C-shaped spring is coupled to the upper part of the expansion part, and the C-shaped spring is fixed to the C-shaped spring, and an outer circumferential surface of the wire member includes a wire member having a stopper ring formed integrally by protruding. An antenna for a terminal is provided.

As described above, according to the present invention, by forming a stopper groove which is configured in multiple stages and can receive and hold one side of the spring on the circumferential surface of the pipe member having the expansion pipe portion at the lower side thereof, The sliding performance of the pipe member can be improved, and the manufacturing cost can be reduced.

In addition, according to the present invention, a stopper groove is formed at a predetermined point on the upper side of the pipe member which is composed of multiple stages and the expansion pipe is formed on the lower side, so that one surface is on one point of the other surface of the friction piece in contact with the inner wall surface of each pipe member. By forming the pipe member into which the convex-shaped stopper formed in this is provided, the sliding performance of a pipe member can be improved and manufacturing cost can be reduced.

According to the present invention, there is provided a pipe member having a multi-stage structure and having an elastic spring coupled to an elastic spring for elastically supporting the pipe member by elastic force during expansion and storage of the pipe member on an upper side of the pipe member having an expansion pipe portion formed at a lower side thereof. Thereby, the sliding performance of a pipe member can be improved and manufacturing cost can be reduced.

In addition, according to the present invention, an expansion pipe portion is formed at the lower end of the wire member, the C-shaped spring is coupled to the upper side of the expansion pipe portion, and the upper side of the C-shaped spring, and to fix the C-shaped spring on the outer peripheral surface of the pipe member. By forming the stopper ring, the sliding performance of the wire member can be improved.

Specific matters other than the problem to be solved, the problem solving means, and the effects of the present invention as described above are included in the following embodiments and the drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the accompanying drawings are only described in order to more easily disclose the contents of the present invention, but the scope of the present invention is not limited to the scope of the accompanying drawings that will be readily available to those of ordinary skill in the art. You will know.

1 is a cross-sectional view showing the structure of an antenna for a terminal according to the present invention.

As shown in FIG. 1, the antenna for a terminal according to the present invention includes a wire member 50 for receiving a signal, and a multi-stage five member 20 and 30 formed to be stretchable in a state of receiving the wire member 50. 40, a fixing member 60 which is lower than the multi-stage pipe members 20, 30, 40 and coupled to the terminal (not shown) to be fixed, and a base member connected to the hinge 61 by the fixing member 60. It consists of 70. Here, the lower end of the lowermost pipe member 20 of the multi-stage pipe members 20, 30, 40 is coupled to and fixed to the end insertion end 71 of the base member 70.

The wire member 50 is a metal wire antenna that is easily bent, and is also called a whip antenna, and an insulating tube (not shown) may be coupled to an outside thereof.

The multi-stage pipes 20, 30, 40 are configured to be stretchable to at least one or more within the allowable size of the terminal. In the antenna for a terminal according to the present invention, the one-stage pipe member 40, the two-stage pipe member 30, and the three-stage pipe member 20, for example, but is not limited to this, if necessary, three or more stages It can also be applied to multistage pipes.

The wire member 50 is accommodated in the inside of the one-stage pipe member 40 made of a hollow cylinder to be stretchable, and the one-stage pipe member 40 likewise has an inner diameter larger than the outer diameter of the one-stage pipe member 40. The branch is accommodated in the two-stage pipe member 30. The two-stage pipe member 30 is similarly housed in a three-stage pipe member 40 having an inner diameter larger than the outer diameter of the two-stage pipe member 30.

A stopper ring 52 is formed at the lower end of the wire member 50 so as to span the engaging jaw 41 of the upper end of the first stage pipe member 40 coupled with the lower end thereof. On the other hand, the structure of the portion A is coupled to the wire member 50 and the first stage pipe member 40 will be described in detail with reference to FIG.

At the lower ends of the first-stage pipe member 40 and the second-stage pipe member 30, expansion pipe parts 43 and 33, which can each function as a stopper, are formed. A convex C-shaped spring 32, 22, which is supported by the expansion pipes 43 and 33 and fixedly fixed by the stopper grooves 42 and 34 formed on the outer circumferential surface thereof, is coupled to the outer circumferential surface thereof. Here, the C-shaped springs 32 and 22 allow the pipe members 20, 30 and 40 of the multistage to be smoothly stretched due to friction when they are received and extended in the longitudinal direction thereof. Meanwhile, a portion B of the pipe members 40 and 30 in which the stopper grooves 42 and 34 are formed, to which the first stage pipe member 40 and the second stage pipe member 30 are coupled, will be described in detail with reference to FIG. 2. It will be described later.

On the upper end of the first to third stage pipe members 40, 30 and 20, the wire member 50, the lower end of the first stage pipe member 40, and the lower end of the second stage pipe member 30 are coupled to respective portions. The locking jaws 41, 31, 21 are formed to be bent so as to be bent in the inner radial direction thereof. At this time, the lower end of the wire member 50, the lower end of the first-stage pipe member 40, and the lower end of the second-stage pipe member 30, which are coupled and fixed by the latching jaws 41, 31, and 21, are not separated upwards.

Hereinafter, a structure and a modification of the pipe member of the antenna for a terminal according to the present invention configured as described above will be described in detail with reference to FIGS. 2 to 4. On the other hand, the description of the fixing member formed at the lower end of the multi-stage pipe to couple and fix the terminal and the multi-stage pipe will be omitted in the embodiment of the present invention.

2 is a diagram showing the structure of an antenna for a terminal according to a first embodiment of the present invention.

As shown in FIG. 2, the antenna for a terminal according to the first embodiment of the present invention is composed of multi-stage pipes 30 and 40 and a wire member (not shown).

The multi-stage pipes 30 and 40 are configured to sandwich pipe members having different diameters (that is, one-stage to three-stage pipe members) to each other to extend and receive in the longitudinal direction thereof. And the expansion pipe part 43 is formed in the lower end of each pipe member 40 except the lowest pipe member (namely, the three-stage pipe member 20), and the C-shaped spring above the expansion pipe 43 is provided. 32 are combined. Further, a stopper groove 42 is formed on the upper side of the C-shaped spring 32 and on the circumferential surface of each pipe member 40 to receive and hook one side of the C-shaped spring 32. At this time, the C-shaped spring 32 allows the multi-stage pipe member to be stretched smoothly due to friction when it is received and extended in its longitudinal direction. On the other hand, in the conventional antenna structure equipped with the C-shaped spring 32, a separate point made of brass between a predetermined point on the outer circumferential surface of the pipe member, that is, the upper end of the pipe member and the upper end of the C-shaped spring, to fix the C-shaped spring. I have combined the stop ring of. However, this structure is inefficient in terms of manufacturing efficiency and cost since it has to go through a complicated process using a separate material when manufacturing a multi-stage pipe member. Accordingly, in the first embodiment of the present invention, one side of the C-shaped spring 32 is fixed, and one side of the C-shaped spring 32 is fixed on the outer circumferential surface of the pipe member 40 in which the C-shaped spring 32 is in close contact. By forming the stopper groove 42 having a predetermined depth so as to be possible, the sliding performance between the pipe members of the multistage can be further improved through a simple process. At this time, it is preferable to use beryllium copper as the material of the C-shaped spring 32 used in the antenna for the terminal according to the first embodiment of the present invention.

The wire member is accommodated in a multistage pipe to transmit and receive a signal.

Therefore, according to the antenna for a terminal according to the first embodiment of the present invention configured as described above, the spring 32 is formed on the circumferential surface of the pipe member 40 which is composed of multiple stages and the expansion pipe 43 is formed on the lower side. By forming the stopper groove 42 which can accommodate one side, the sliding performance of the pipe member 30 can be improved, and manufacturing cost can be reduced.

3 is a diagram illustrating a structure of an antenna for a terminal according to a second embodiment of the present invention.

As shown in FIG. 3, the antenna for a terminal according to the second embodiment of the present invention is composed of multi-stage pipes 40a and 30a and a wire member (not shown).

The multi-stage pipes 40a and 30a are configured to sandwich pipe members having different diameters from each other and to extend and receive in the longitudinal direction thereof. Moreover, the expansion pipe | tube 43a is formed in the lower end of each pipe member 40a except the lowest pipe member. Then, a stopper groove 42a is formed at a predetermined point above the expansion pipe 43a so that one surface thereof is formed on one point of the other surface of the friction piece 33a in contact with the inner wall surface of each pipe member 30a. The stopper 34a of a shape is fitted. Here, the friction piece 33a is made of a plastic material.

On the other hand, in the conventional antenna structure, the C-shaped spring is attached to allow the multi-stage pipe member to be extended and received smoothly due to friction when it is stored and extended in the longitudinal direction thereof. However, it is inefficient in terms of manufacturing efficiency and cost since a separate stop ring made of brass must be coupled between a predetermined point on the outer circumferential surface of the pipe member, that is, between the top of the pipe member and the top of the C-shaped spring to fix the C-shaped spring. . Therefore, in the second embodiment of the present invention, instead of using the C-shaped spring, the stopper groove 42a is formed on the outer circumferential surface of the pipe member 40a and at a predetermined point above the expansion pipe 43a. Further, the friction piece 33a, which is made of a plastic material and has a convex stopper 34a of a convex shape that fits into the stopper groove 42a on one surface of the surface, is fitted to fit into the stopper groove 42a. By coupling between the inner pipe member 40a and the outer pipe member 30a, the sliding performance between the pipe members 40a and 30a of the multistage can be further improved through a simple process.

The wire member is accommodated in a multistage pipe to transmit and receive a signal.

According to the antenna for a terminal according to the second embodiment of the present invention configured as described above, the stopper groove 42a is formed at a predetermined point on the upper side of the pipe member 40a, which is composed of multiple stages and the expansion pipe portion 43a is formed on the lower side. Formed to form a pipe member 40a into which one surface of the convex stopper 34a formed on one point of the other surface of the friction piece 33a is in contact with the inner wall surfaces of the respective pipe members 40a and 30a. By this, the sliding performance of the pipe member 40a can be improved, and manufacturing cost can be reduced.

4 is a view showing the structure of an antenna for a terminal according to a third embodiment of the present invention.

As shown in FIG. 4, the antenna for a terminal according to the third embodiment of the present invention is composed of multi-stage pipes 40b and 30b and a wire member (not shown).

The multi-stage pipes 40b and 30b are configured to sandwich pipe members having different diameters from each other and to extend and receive in the longitudinal direction thereof. Moreover, the expansion pipe part 43b is formed in the lower end of each pipe member 40b except the lowest pipe member. Then, an elastic spring 33b for elastically supporting the pipe member 40b is coupled to the upper side of the expansion pipe 43b by an elastic force when the pipe member 40b is extended and received. Here, the elastic spring 33b has a coil shape and has a compression section therein to induce elasticity when the pipe member 40b is elongated so that the elastic spring 33b and the outer pipe member are accommodated. 30b). As described with reference to Figs. 2 and 3, the conventional technique of separately manufacturing the stop ring on the pipe member is inefficient in terms of manufacturing efficiency and cost, so in the third embodiment of the present invention, the outer peripheral surface of the pipe member 40b is simply Through the elastic spring (33b) coupled to the, it is possible to further improve the sliding performance between the multi-stage pipe member (40b, 30b).

The wire member is accommodated in a multistage pipe to transmit and receive a signal.

According to the antenna for a terminal according to the third embodiment of the present invention configured as described above, the pipe member 40b is extended and received on the upper side of the pipe member 40b, which is configured in multiple stages and has an expansion pipe portion 43b formed on the lower side. By forming the pipe member to which the elastic spring 33b which elastically supports the pipe member 40b by the elastic force at the time is formed, the sliding performance of the pipe member 40b can be improved and manufacturing cost can be reduced.

On the other hand, the test measurement results for the rod life is another feature of the multi-stage pipe according to the present invention configured as shown in Figures 1 to 4 are shown in Table 1 below. For reference, the rod life test of the multistage pipe was performed by repeatedly inserting and withdrawing the three-stage pipe member at 12,000 times at a speed of 30 times per minute, and the rate of change of the initial force value was 50% after 12,000 tests. What was within was made into reference conditions. In Table 1, only five antennas (ie, samples) including multistage pipes to be measured are listed.

TABLE 1

Sample number Measurement standard 1 stage 2nd stage 3-stage One Initial strength 100 130 230 6,000 times 70 110 220 12,000 times 60 100 200 2 Initial strength 100 150 290 6,000 times 90 120 270 12,000 times 80 100 220 3 Initial strength 80 160 300 6,000 times 70 150 270 12,000 times 60 140 210 4 Initial strength 60 130 250 6,000 times 60 120 200 12,000 times 60 90 160 5 Initial strength 80 150 290 6,000 times 80 140 200 12,000 times 80 130 150

Therefore, as shown in Table 1, the antenna for the terminal according to the embodiment of the present invention has been stretched and inserted 12,000 times, and as a result, the force of the coupling portion of each of the first to third pipe members is increased. By having a value much higher than the reference 50%, it can be seen that by using this, the life of the antenna can be significantly extended.

5 is a diagram illustrating the structure of an antenna for a terminal according to a fourth embodiment of the present invention.

As shown in FIG. 5, the antenna for a terminal according to the fourth embodiment of the present invention relates to an improvement in the structure of a wire member. That is, the expansion pipe portion 54 is formed at the lower end of the wire member 50, the C-shaped spring 53 is coupled to the upper side of the expansion pipe 54, the upper side of the C-shaped spring 53, and also the wire member The stopper ring 52 which fixes the C-shaped spring 53 on the outer peripheral surface of the pipe member of 50 is formed.

On the other hand, in the structure of a wire member of a conventional antenna equipped with a C-shaped spring, a separate point made of brass between a predetermined point on the outer circumferential surface of the wire member, that is, the upper end of the pipe member and the upper end of the C-shaped spring so as to fix the C-shaped spring I have combined the stop ring of. However, this structure is inefficient in terms of manufacturing efficiency and cost since it requires a complicated process using a separate material when manufacturing a multi-stage pipe member. Therefore, in the fourth embodiment of the present invention, the C-shaped spring 53 is on one side of the C-shaped spring 53 and on the outer circumferential surface of the pipe member 50 of the wire member 50 in which the C-shaped spring 53 is in close contact. By forming the stopper ring 52 having a predetermined thickness through processing so that one side can be fixed, sliding performance between the wire member 50 and the pipe member 40 coupled to the lower end thereof can be further improved.

Therefore, according to the antenna for a terminal having the structure as described above, it is possible to improve the ease of use by smoothing the sliding of the multi-stage pipe and the wire member, it can be used repeatedly for a long time.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from equivalent concepts should be construed as being included in the scope of the present invention.

1 is a cross-sectional view showing the structure of an antenna for a terminal according to the present invention.

2 is a diagram showing the structure of an antenna for a terminal according to a first embodiment of the present invention;

3 is a diagram showing the structure of an antenna for a terminal according to a second embodiment of the present invention;

4 is a diagram showing the structure of an antenna for a terminal according to a third embodiment of the present invention;

5 is a view showing the structure of an antenna for a terminal according to a fourth embodiment of the present invention.

Claims (8)

Pipe members having different diameters are fitted to each other to extend and receive in the longitudinal direction, and an expansion pipe portion is formed at the lower end of each pipe member except the lower pipe member, and a C-shaped upper portion of the expansion pipe portion is formed. A multi-stage pipe having a spring coupled thereto, and having a stopper groove formed on an upper side of the C-shaped spring and capable of receiving and hooking one side of the C-shaped spring on a circumferential surface of each pipe member; And A wire member accommodated in the multi-stage pipe for transmitting and receiving a signal, and an extension pipe portion is formed at a lower end thereof, and a C-shaped spring is coupled to an upper side of the extension pipe, and the C-shaped spring is fixed to the C-shaped spring and fixed to the wire member. A wire member having a stopper ring having an outer circumferential surface protrudingly formed integrally therewith; Including, Antenna for the terminal. The method of claim 1, The C-shaped spring is made of beryllium copper, Antenna for the terminal. Pipe members having different diameters are fitted to each other to extend and receive in the longitudinal direction thereof, and an expansion pipe portion is formed at the lower end of each pipe member except the lower pipe member, and a predetermined point on the upper side of the expansion pipe portion is provided. A multi-stage pipe having a stopper groove formed therein, into which a convex stopper is formed at one point of the other surface of the friction piece in which one surface is in contact with the inner wall surface of each pipe member; And A wire member accommodated in the multi-stage pipe for transmitting and receiving a signal, and an extension pipe portion is formed at a lower end thereof, and a C-shaped spring is coupled to an upper side of the extension pipe, and the C-shaped spring is fixed to the C-shaped spring and fixed to the wire member. A wire member having a stopper ring having an outer circumferential surface protrudingly formed integrally therewith; Including, Antenna for the terminal. The method of claim 3, The friction piece comprises a plastic material, Antenna for the terminal. Pipe members having different diameters are fitted to each other to extend and receive in the longitudinal direction thereof, and an expansion pipe portion is formed at a lower end of each pipe member except the lower pipe member, and a pipe member is disposed above the expansion pipe portion. A multi-stage pipe elastically supporting the pipe member by an elastic force during its expansion and storage, and having an elastic spring having a compression section therein, formed in a coil shape surrounding the pipe member; And A wire member accommodated in the multi-stage pipe to transmit and receive a signal; Including, Antenna for the terminal. The method according to any one of claims 1, 3, and 5, The upper end of each of the multi-stage pipe is formed with a locking step bent in the inner radial direction so that the upper pipe member is stretched in the longitudinal direction, Antenna for the terminal. The method of claim 5, The wire member, The expansion pipe is formed at the lower end, the C-shaped spring is coupled to the upper side of the expansion pipe, the C-shaped spring is fixed to the C-shaped spring and has a stopper ring formed integrally by protruding the outer peripheral surface of the wire member, Antenna for the terminal. A multi-stage pipe configured to sandwich pipe members having different diameters from each other and extend and receive in the longitudinal direction thereof; And A wire member accommodated in the multi-stage pipe for transmitting and receiving a signal, and an extension pipe portion is formed at a lower end thereof, and a C-shaped spring is coupled to an upper side of the extension pipe, and the C-shaped spring is fixed to the C-shaped spring and fixed to the wire member. A wire member having a stopper ring having an outer circumferential surface protrudingly formed integrally therewith; Including, Antenna for the terminal.

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