KR101323338B1 - A antenna having a spring with protrusion parts - Google Patents

Abstract

The present invention relates to a multi-stage antenna, in accordance with an aspect of the invention tubular pipe; A rod antenna received at the center of the pipe; And a spring fitted to the rod antenna and formed to be bent along the longitudinal direction of the pipe, the spring having an elastic part adhered to the inner surface of the pipe at two or more places. There is provided a multi-stage antenna characterized in that.

Description

An antenna with a spring provided with a protrusion {A ANTENNA HAVING A SPRING WITH PROTRUSION PARTS}

The present invention relates to a multi-stage antenna, and more particularly, it is used in various products for transmitting and receiving radio waves, and in particular, even when used in small electronic products such as mobile phones and navigation, it is possible to exhibit excellent elastic force, and made of a simple structure The present invention relates to a multi-stage antenna having a stable structure.

The antenna is a means for receiving radio waves sent from the outside or transmitting signals therein and is an essential component of a wireless communication device.

In particular, the multi-stage antenna, which has a drawable form, has been used in electronic products such as TVs, radios, automobiles, and the like, and has recently been used in portable terminals such as mobile phones.

With the rapid spread of portable terminals, products with various functions have been released, and terminals capable of transmitting and receiving high quality and high quality video and various contents are easily accessible. In order to transmit a large amount of information, an antenna having a predetermined size or more is required. For this reason, a multistage antenna is frequently used in a miniaturized portable terminal.

The multi-stage antenna can be used by the user to adjust its length. In order to maintain a desired length when the antenna is extended or contracted, a member that provides a constant friction force between each pipe and the rod antenna is required to enable smooth operation. In order to play such a role, a plate-shaped spring suitable for miniaturization and excellent in variable restoration is used.

To be used in the antenna, the leaf spring must be coupled to the bottom of the rod antenna or the bottom of the pipe.

As a plate spring, a cylindrical spring having a plurality of convex wings is mainly used. Since the convex cylindrical spring has a small contact area with the rod antenna, the static friction is weak, there may be a gap in the extension or contraction of the multi-stage antenna. Thus, in order to couple the spring to the rod antenna, a separate member or form characteristic is required. As a method for this, a coupling hole for fixing the rod antenna is provided on the inner side, and a separate cylindrical member having a long cylindrical shape having a fixing groove for fixing the spring on the outer side is used.

However, in the case of the coupling member, a long coupling hole for strong coupling with the rod antenna must be formed, and a fixing groove for fixing the spring must be formed, which is difficult to manufacture and requires a separate coupling process.

Korean Utility Model Registration No. 20-0415559 relates to a telescopic antenna, which does not require the use of a separate coupling member as described above, and allows for easy replacement of a part of the antenna and extends the entire length of the rod antenna. Start the antenna of.

According to the Korean Utility Model Registration No. 20-0415559, a load antenna for transmitting and receiving a signal; The rod antenna accommodates the rod antenna, and is made of a multistage sleeve to be stretchable. An extension tube is formed at a lower end of each sleeve except for the rod antenna and the lowermost sleeve, and an antenna having a plate spring coupled to the upper portion of the expansion tube. Is disclosed. And according to the antenna configured as described above, by forming an expansion pipe at the bottom of each sleeve except the rod antenna and the lowermost sleeve and engaging the leaf spring thereon, no separate stopper is required, and each component of the antenna Since it can be separated downward, only a part can be replaced without having to discard the whole antenna in the case of any breakage or failure, thereby reducing the assembly cost.

When the stopper is formed at the bottom of the antenna, the downward movement of the spring may be prevented, but the upward movement cannot be prevented, so that scratches may occur on the rod antenna or the sleeve of the upper portion in which the expansion part is formed. .

As such, forming a separate stopper on the top of the spring is mainly used to prevent the upward movement of the spring. When the top stopper is formed, a problem arises in that the length of the entire extended antenna is shortened. In order to transmit and receive various types of radio waves, a sufficient length of an extended antenna must be secured, and the difficulty of securing the length actually causes a big problem. This is further explained as follows.

The top stopper is usually formed in a ring shape and is fitted on top of the spring with the spring fitted inside the sleeve. This upper stopper is caught on the top of the outer sleeve when the inner sleeve is pulled out, and serves to prevent the inner sleeve from being pulled out of the outer sleeve anymore. As a result, the overall antenna length is shorter than without the top stopper.

In addition, although an antenna of the form of forming a stopper on both sides of the spring is disclosed, it is not easy to form the stopper on both sides, and there is a problem that the process is very cumbersome.

In addition, the spring used in the conventional multi-stage antenna has a structure of convex outwardly or concave inwardly, and when the antenna is assembled using the conventional spring, the spring is partially plastically deformed by the repeated load applied to the spring. There is a case that often does not exhibit sufficient elastic force, there was a problem that the reliability of the product falls.

The present invention has been made to solve the problems as described above, an embodiment of the present invention is made so that the spring can be stably fixed by a simple structure is very easy to manufacture and assembly, the relative length The present invention relates to providing an antenna employing a spring that can form a long antenna and that can exhibit a stable elastic force even in the assembly and repeated use of the antenna.

Multi-stage antenna according to an embodiment of the present invention, the tubular pipe; A rod antenna accommodated in the center of the pipe; And a spring fitted to the rod antenna, the spring having an elastic portion formed to be bent along the longitudinal direction of the pipe and being in close contact with the inner surface of the pipe at two or more places. The rod antenna accommodates one side of the elastic portion. The depression is formed so as to.

The spring includes a lower mounting part fitted to be in close contact with the rod antenna and extending downwardly from the elastic part, and an upper mounting part fitted to be in close contact with the rod antenna and extended upwardly at the elastic part.

Here, the elastic part is provided with an upper protrusion and a lower protrusion which protrude outwardly from two places, and an accommodating part which is connected to the upper protrusion and the lower protrusion and is accommodated in the depression, and the upper protrusion and the lower protrusion are symmetrical. Is formed.

Further, the radius of curvature of the upper and lower protrusions is larger than the radius of curvature of the receiving portion.

Further, in a state where the spring is not fitted to the rod antenna accommodated in the center of the pipe, the inner diameter of the accommodating portion is smaller than the inner diameter of the lower mounting portion and the upper mounting portion.

In the multi-stage antenna according to a preferred embodiment of the present invention, the lower mounting portion and the upper mounting portion are formed in a ring shape to be inserted into the rod antenna.

Here, the lower mounting portion and the upper mounting portion are cut in the vertical direction to form an incision.

In addition, the elastic portion is cut in the vertical direction is divided into a plurality.

According to an embodiment of the present invention as described above, first, the elastic portion forming the spring is formed to be in close contact with the inner surface of the pipe in two or more places to distribute the external force applied to the elastic portion to reduce the degree of law strain It is possible to ensure the reliability of the spring according to this, and to form a recess so that one side of the elastic part is accommodated in the rod antenna to form a simple stopper using the form characteristic of the spring and to secure the spring stably It becomes possible.

In particular, since it is not necessary to form a stopper on the top of the spring, the length of the portion where the spring is formed can be shortened, so that the rod antenna can be sufficiently drawn out of the pipe, so that the entire length of the antenna can be sufficiently long.

In addition, the spring may be formed of an elastic part, a lower mounting part and an upper mounting part, and the elastic part may be formed of an upper protrusion part, a lower protrusion part and an accommodating part so that external force applied to the spring may be distributed in a balanced manner in the vertical direction. And the same external force acts upon entry.

In addition, the radius of curvature of the upper protrusion and the lower protrusion is formed large and the radius of curvature of the receiving portion is formed small, so that the receiving portion can be stably received in the recessed portion while exerting sufficient elastic force by the upper and lower protrusions.

1 is a perspective view showing a multi-stage antenna according to an embodiment of the present invention,
2 is an exploded perspective view showing the multi-stage antenna according to FIG.
3 is a perspective view of the spring shown in FIG.
4 is a cross-sectional view showing a state in which the spring shown in FIG. 2 is coupled to a rod antenna and a pipe;
5 is a sectional view showing the spring shown in FIG.
6 is a cross-sectional view comparing the state of use of a conventional multi-stage antenna and a multi-stage antenna according to the present invention.

1 is a perspective view showing a multi-stage antenna 1 according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing a multi-stage antenna 1 according to Figure 1, Figure 3 is a spring shown in Figure 2 30 is a perspective view of FIG. 4, and FIG. 4 is a cross-sectional view illustrating a state in which the spring 30 illustrated in FIG. 2 is coupled to the rod antenna 20 and the pipe 10.

The multi-stage antenna 1 according to the preferred embodiment of the present invention includes a pipe 10, a rod antenna 20 and a spring 30 and is formed to be stretchable in length.

The antenna according to the present invention can be used in TVs, radios, automobiles, and the like, as well as in small electronic products such as mobile phones and PDAs. In particular, the antenna according to the present invention can exhibit a sufficient elastic force (expressed as a friction force when the antenna is pulled out) even if it is formed in a small size, and is easy to manufacture and assemble.

And the description of the direction of the multi-stage antenna (1) according to the present invention, as shown in Figure 1, to be based on the state in which the multi-stage antenna (1) is standing.

The pipe 10 forms the body of the multi-stage antenna 1 of the present invention, and has a circular cross section. Each pipe 10 is formed such that the outer diameter of any pipe 10 is smaller than the inner diameter of the pipe 10 that accommodates it, and the rod antenna 20 is accommodated at the center thereof. The pipe 10 may be coupled to the spring 30 as in the rod antenna 20. In this case, a spring 30 suitable for the size of each pipe 10 is coupled. The upper end of the pipe 10 is formed such that the inner diameter is reduced so that the pipe 10 or the rod antenna 20 accommodated in the pipe 10 does not escape upward.

The rod antenna 20 is located in the center of the multi-stage antenna 1 of the present invention in a wire shape, and is accommodated in the pipe 10. The spring 30 is fitted to and coupled to the rod antenna 20, and also has a circular cross section. In addition, the rod antenna 20 is formed with a recess 21 which is fixed after receiving the receiving portion 31c to be described later, and further description of the recess 21 will be described later.

In the present invention, the spring 30 is inserted and coupled to the rod antenna 20 based on the form. However, as shown in FIG. 2, the spring 30 is located relatively inward. Since it can be used by being fitted to the pipe 10, the same configuration as the recess 21 is formed in the pipe 10.

As shown in Figure 2, the multi-stage antenna 1 according to the present invention includes a cap 40, the cap 40 is coupled to the top of the rod antenna 20. The cap 40 is provided with a protruding coupling hole through which the upper end of the rod antenna 20 can be coupled, and the pipe 10 to prevent the rod antenna 20 from being separated from the pipe 10. It has the shape of a disk or cylinder with a diameter larger than). The user can use the cap 40 as a handle during extension and contraction of the multi-stage antenna (1).

The spring 30 is generally cylindrical in shape and is positioned at the lower end of the rod antenna 20 after being fitted to the rod antenna 20. The spring 30 has a plurality of plate-like springs 30 are coupled in parallel along the circumferential direction and protrude convexly from the center. The protruding portion abuts against the inner circumference of the pipe 10 and provides a constant friction force when the rod antenna 20 moves up and down.

The spring 30 according to the present invention is formed to be elastically deformable as a whole, and is largely divided into a lower mounting portion 32, an elastic portion 31, and an upper mounting portion 33.

The lower mounting portion 32 is fitted to be in close contact with the rod antenna 20 and forms the bottom of the spring 30. The upper mounting portion 33 is fitted in close contact with the rod antenna 20 and forms an upper portion of the spring 30. In addition, the lower mounting portion 32 and the upper mounting portion 33 are formed in a ring shape to be inserted into the rod antenna 20. As shown in FIG. 3, the lower mounting portion 32 and the upper mounting portion 33 are completely cut in the longitudinal direction to form an incision 34, which uses the spring to load the spring 30 with the rod. This is for easy fitting into the antenna 20.

The elastic portion 31 is formed between the lower mounting portion 32 and the upper mounting portion 33, and is formed to be bent to form a waveform along the longitudinal direction of the antenna, that is, the longitudinal direction of the pipe 10, two places It is made to be in close contact with the inner surface of the pipe 10 above. Particularly, in the spring 30 according to the preferred embodiment of the present invention, the elastic part 31 is provided with an upper protrusion part 31a and a lower protrusion part 31b protruding outward from two places, and the upper protrusion part 31a. ) And the receiving portion 31c is formed at the portion connecting the lower protrusion 31b. That is, the accommodating part 31c is formed to protrude relatively inward with respect to the upper protrusion part 31a and the lower protrusion part 31b.

The elastic part 31 is cut in the vertical direction is divided into a plurality. By being formed in this way, the spring 30 can exert an even elastic force along the circumference of the rod antenna 20, the frictional force of a stable form as a whole when the draw-out of the multi-stage antenna (1) is exhibited.

The upper protrusion 31a and the lower protrusion 31b receive an external force between the pipe 10 and the rod antenna 20 and exert an elastic force, while being in close contact with the inner surface of the pipe 10, the rod antenna 20 ) Generates a predetermined frictional force when drawing out or drawing in). The upper protrusion 31a and the lower protrusion 31b are preferably formed symmetrically in order to distribute the external force uniformly in the vertical direction.

Rather than exerting an elastic force, the accommodating part 31c allows the spring 30 to stay at a predetermined position in the state accommodated in the recess 21 and serves as a stopper with the recess 21. do. Here, the recess 21 is formed in a shape recessed on the outer peripheral surface of the rod antenna 20, the cross-sectional shape may be formed in a circular or polygonal shape. However, in order to facilitate formation and natural coupling with the accommodating part 31c, it is preferable to be formed roundly in accordance with the curvature of the accommodating part 31c.

As shown in FIG. 4, the radius of curvature r1 of the upper protrusion 31a and the lower protrusion 31b is much larger than the radius of curvature r2 of the receiving portion 31c. The upper protrusion 31a and the lower protrusion 31b are formed to form a gentle curve as a whole so as to exert a sufficient elastic force throughout, and the receiving portion 31c is not easily separated from the recess 21. It is formed relatively in comparison with the upper protrusion part 31a and the lower protrusion part 31b.

As such, in the multi-stage antenna 1 according to the present invention, the spring 30 is not simply convex to the outside, but is provided with an upper protrusion part 31a and a lower protrusion part 31b. (10) The elastic portion 31 is provided to be in close contact with the inner surface is provided to distribute the external force applied to the elastic portion 31 by the external force can reduce the degree of lawsuit deformation and thereby the reliability of the spring 30 Can be secured.

The table below shows a conventional outwardly convex spring 30 (the pipe 10 contact in one place) and the spring 30 according to the invention (the pipe 10 contact in two places) for the same type of antenna. In this case, the measured values at the time of assembling and the load at the ecology of drawing out and drawing 50 times after assembling are shown. (The overall length of the spring 30 is the same, the load is a relative value)

NO. Existing Spring (30) Spring 30 according to the present invention Before withdrawal After withdrawal Before withdrawal After withdrawal One 100 70 150 100 2 100 70 120 80 3 100 80 150 70 4 100 60 140 100 5 110 90 150 80 6 100 90 160 130 7 90 70 160 100 8 90 80 150 130 9 110 80 160 90 10 90 70 150 90

As shown in the above table, in the case of the conventional spring 30, the withdrawal and withdrawal 50 times after assembly is performed, the minimum value of the load is 60, the maximum value is 90, and the average value is 76. In this case, it can be confirmed that the minimum value of the load is 70, the maximum value is 130, and the average value is 104. Accordingly, when the spring 30 according to the present invention is used, it can withstand larger loads and exhibit excellent elastic force. can confirm.

In addition, in the present invention, the receiving portion 31c is accommodated in the recess 21 formed in the rod antenna 20 to use the characteristic features of the spring 30 (a curved form of the elastic portion 31). The stopper of a simple form can be formed and the spring 30 can be fixed stably. In addition, even when only one recess 21 is formed, both the downward movement and the upward movement of the spring 30 can be prevented. Here, since the upper protrusion 31a and the lower protrusion 31b are in close contact with the inner circumferential surface of the pipe 10, the accommodation portion 31c is prevented from escaping from the recess 21.

However, in the multi-stage antenna according to the present invention, the lower end of the rod antenna 20 supports the lower end of the spring 30 and an extension part (see FIG. 6b) having an expanded diameter in the rod antenna 20 is formed. Preferably, the spring 30 is prevented from escaping below the rod antenna 20 even when the rod antenna 20 is drawn very strongly inside the pipe 10. That is, if the depression 21 and the receiving portion 31c are means for fixing the spring 30 when the rod antenna 20 moves (in the pipe 10), the expansion tube is the rod antenna. The rod antenna 20 is used as a means for preventing the rod antenna 20 from being separated from the pipe 10 while the 20 is completely drawn out.

In addition, since it is not necessary to form a separate stopper (S, see Fig. 6) on the top of the spring 30, it is possible to form a short length of the portion in which the spring 30 is formed, thereby the rod antenna Since 20 can be sufficiently drawn out from the pipe 10, the entire length of the multi-stage antenna 1 can be made sufficiently long.

That is, as shown in Figure 6, when the length of the spring (FIG. 6A) used in the conventional multi-stage antenna and the spring (30, 6B) used in the multi-stage antenna 1 according to the present invention is the same, In the antenna, a separate stopper (S) should be formed to fix the spring, so that the stopper (S) is caught on the top of the pipe so that the total antenna length is shortened by the length of the stopper (S). Since S) is not formed, it is possible to secure a relatively long withdrawal length.

5 is a cross-sectional view of the spring 30 shown in FIG.

In the multi-stage antenna 1 according to the preferred embodiment of the present invention, the inner diameter of the accommodating part 31c is provided in a state where the spring 30 is not fitted to the rod antenna 20 accommodated in the center of the pipe 10. Silver is formed smaller than the inner diameter of the lower mounting portion 32 and the upper mounting portion 33. That is, even when the spring 30 is assembled, the inner diameter d2 of the accommodating portion 31c is the inner diameter d1 of the lower mounting portion 32 and the upper mounting portion 33 even when no external force is applied. It is formed smaller.

Even when the inner diameter of the accommodating portion 31c is not smaller than the inner diameters of the lower mounting portion 32 and the upper mounting portion 33 in the state before assembly, the elastic portion 31 is pressed from the outside after assembly. It may be assumed that the shape is elastically deformed so that the accommodating portion 31c is accommodated in the recess 21. In this case, however, the elasticity of the elastic portion 31 may be reduced by repeated use of the multi-stage antenna 1, and the accommodation portion 31c may be separated from the recess 21. It becomes possible. When the accommodating part 31c is separated from the recess 21, the spring 30 may not be fixed at a predetermined position of the rod antenna 20, and the rod may be pulled out when the multi-stage antenna 1 is pulled out. Scratches and the like are generated in the antenna 20.

In the present invention, in order to prevent this, the inner diameter d2 of the accommodating portion 31c is the inner diameter d1 of the lower mounting portion 32 and the upper mounting portion 33 in a state before the spring 30 is assembled. It is formed to be smaller, and even if used repeatedly so that the receiving portion (31c) is not separated from the recessed portion (21).

1: multi-stage antenna 10: pipe
20: road antenna 21: depression
30: spring
31: elastic portion 31a: upper protrusion
31b: lower protrusion 31c: receiving portion
32: lower mounting part
33: upper mounting part
34 incision
40: cap

Claims (8)

Tubular pipes;
A rod antenna received at the center of the pipe; And
And a spring fitted to the rod antenna and formed to be bent along the longitudinal direction of the pipe, the spring having an elastic part adhered to the inner surface of the pipe in two or more places.
The rod antenna is provided with a recessed portion to accommodate one side of the elastic portion,
The elastic part is provided with an upper protrusion and a lower protrusion, which protrude outwardly from two places, and a receiving part which connects the upper protrusion and the lower protrusion and is accommodated in the depression,
The upper protrusion and the lower protrusion is formed symmetrically,
The curvature radius of the upper projection and the lower projection, the multi-stage antenna, characterized in that formed larger than the radius of curvature of the receiving portion.
The method of claim 1, wherein the spring,
And a lower mounting part fitted to be in close contact with the rod antenna and extending downward from the elastic part, and an upper mounting part fitted to be in close contact with the rod antenna and extending upwardly at the elastic part.
delete delete The method of claim 2, wherein the spring is not fitted to the rod antenna accommodated in the center of the pipe,
The inner diameter of the receiving portion, the multi-stage antenna, characterized in that formed smaller than the inner diameter of the lower mounting portion and the upper mounting portion.
3. The method of claim 2,
The lower mounting portion and the upper mounting portion is formed in a ring shape multi-stage antenna, characterized in that the interference to the rod antenna.
The method according to claim 6,
The lower mounting portion and the upper mounting portion, multi-stage antenna, characterized in that the incision is formed by cutting in the vertical direction.
The method according to any one of claims 1, 2 and 5 to 7,
The elastic portion is cut in the vertical direction multi-stage antenna, characterized in that divided into a plurality.

Images