KR100703961B1 - Antenna body pre-form for a portable devices, method and device for manufacturing a portable devices' antenna body using the same - Google Patents

Abstract

According to the present invention, after forming a preform of an antenna body in which a mounting portion, a lower body, and an upper body are integrated into a single member through a die casting method, the final antenna body product may be manufactured by a simple drilling operation of the preform. The present invention relates to an antenna body preform for a portable device, a method of manufacturing an antenna body for a portable device using the same, and a manufacturing apparatus thereof, which simplifies a manufacturing process of an antenna body product, thereby allowing mass production and cost reduction of the product.

Description

Antenna body preform for portable device, method for manufacturing antenna body for mobile device using same, and manufacturing device therefor {Antenna body pre-form for a portable devices, method and device for manufacturing a portable devices' antenna body using the same}

1 is a perspective view showing a mobile phone antenna body preform according to the present invention.

Figure 2 is a perspective view showing a state before separation of the preform shown in FIG.

3 is a cross-sectional view of FIG.

Figure 4 is a plan view showing a mobile phone antenna body manufacturing apparatus according to the present invention.

5 is a front view of FIG. 4.

6 is an exemplary view showing a manufacturing process of a mobile phone antenna body finished product by the manufacturing apparatus of FIGS.

7 is a flow chart schematically showing a method for manufacturing a mobile phone antenna body according to the present invention.

8 is an exemplary view showing an antenna body preform having another embossed shape structure applicable to the manufacturing method of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: preform 110: lower body

120: upper body 122: embossed

124: hollow portion 130: mounting portion

200: cylinder portion 210: fixed portion

212: fixing groove 220; Piston shaft

230: guide portion 232: insertion hole

240: support 250: guide wall

300: machining head 310: spindle

312 cooling hole 320 cutting tool

350: main bed 360: auxiliary bed

According to the present invention, after forming a preform of an antenna body in which a mounting portion, a lower body, and an upper body are integrated into a single member through a die casting method, the final antenna body product may be manufactured by a simple drilling operation of the preform. The present invention relates to an antenna body preform for a portable device, a method of manufacturing an antenna body for a portable device using the same, and a manufacturing apparatus thereof, which simplifies a manufacturing process of an antenna body product, thereby allowing mass production and cost reduction of the product.

In general, a portable wireless communication device such as a mobile phone is provided with an antenna that serves as a medium when transmitting and receiving a signal with an external base station.

Currently commercially available cell phone antennas are largely classified into a fixed type, a retractable type, and an internal type.

As an example of the fixed type antenna, Korean Utility Model Registration No. 20-0352009 has one antenna member to which a helical (or coil) structure is applied, and in the adjacent PCS band and the Bluetooth band, An integrated dual band antenna that enables dual resonance is presented.

In addition, Korean Patent Application Publication No. 20-0366702 proposes a metal rod manufacturing apparatus for a mobile phone antenna having the helical type as described above, in which a cutting operation of an antenna metal rod material which is performed by a conventional manual operation is automatically performed. It focuses on realizing productivity and cost savings.

Meanwhile, a conventional method for manufacturing a mobile phone antenna body is manufactured by inserting an insert into a metal rod after inserting a coil into a bobbin and inserting it into a metal rod, or by processing copper alloy firstly After fabricating a rod, a method of fabricating a helical shape by secondary processing on the metal rod has been mainly used.

However, the conventional method of manufacturing a mobile phone antenna body as described above requires a separate helical part processing process to form a helical (or coil) shape in the mobile phone antenna body, which is not suitable for mass production due to low productivity, and causes a cost increase factor. There was a problem brought about.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention after forming the preform of the antenna body in which the mounting portion, the lower body and the upper body is integrated into a single member through a die casting method Through the simple drilling operation of the preform, the antenna body product of the final shape can be manufactured, which simplifies the manufacturing process of the antenna body product, and accordingly the antenna body preform for portable devices, which can mass-produce and reduce the cost of the product, Provided are a method of manufacturing an antenna body for a portable device using the same, and an apparatus for manufacturing the same.

Antenna body preform for a portable device of the present invention for achieving the above object is a mounting unit; A lower body connected to an upper side of the mounting portion; And an upper body having a smaller diameter than the lower body and connected to an upper side of the lower body, and having an embossed portion having a predetermined shape connected to the lower body on an outer surface thereof, wherein the mounting portion and the lower body and The upper body is characterized in that formed integrally.

In accordance with another aspect of the present invention, there is provided a method of manufacturing an antenna body for a portable device, wherein an antenna having a mounting portion, a lower body connected to the mounting portion, and an upper body protruding a relief portion connected to the lower body is formed. Forming a preform of the body; And a drilling processing step of removing the upper body portion of the preform by drilling to leave only the shape of the relief portion connected to the lower body.

At this time, the preform molding step is preferably made through die casting.

In accordance with one aspect of the present invention, there is provided an antenna body manufacturing apparatus for a portable device, including: a cylinder portion in which a fixing portion to which a mounting portion of an antenna body preform is fixed is installed to be movable in a front and rear direction; A guide part disposed at a front side of the cylinder part and guiding an embossed part forming part of the preform when the cylinder part moves forward; And a processing head disposed at the front side of the guide part, the processing head having a cutting tool for removing the upper body portion of the preform through drilling to leave only the relief portion connected to the lower body of the preform. It is characterized by.

At this time, it is preferable to form a clearance between the relief portion and the guide portion of the preform so that the elastic deformation of the relief portion.

In addition, the guide portion is formed with an input hole for introducing the outside air to the relief portion side to remove the chips generated during the drilling of the preform.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a mobile phone antenna body preform according to an embodiment of the present invention, Figure 2 is a perspective view showing the state before the separation immediately after die casting of the preform shown in Figure 1, Figure 3 is It is a cross section.

1 to 3, the mobile phone antenna body preform 100 according to the present invention has a lower body 110 having a cylindrical shape and a smaller diameter than the lower body 110, and the lower body It consists of an upper body 120 connected to the upper side of the 110, and a mounting portion 130 connected to the lower side of the lower body (110).

That is, as shown in the cross-sectional structure of FIG. 3, the preform 100 has a lower portion of the lower body 110, while the upper body 120 is formed to be relatively thinner than the lower body 110. It is.

On the other hand, on the outer circumferential surface of the upper body 120 has a projecting width parallel to the outer circumferential surface of the lower body 110 is formed with an embossed portion 122 protruding in a radial direction, the one end of the embossed portion 122 is A shape structure wound in a coil (or spiral) shape is formed along the outer circumferential surface of the upper body 120 in a state of being connected to the lower body 110.

In addition, a hollow portion 124 having a hollow shape is formed at an inner portion of the preform 100 extending from the end of the upper body 120 to the lower body 110 to allow the cutting tool 320 to be described later. .

At this time, in one embodiment of the present invention to form a hollow portion 124 through which the cutting tool 320 can enter and exit inside the preform 100 to facilitate the cutting process, such hollow portion as described above It is also possible to form the inside of the preform 100 in a hollow form without forming it to be removed through the cutting tool 320 (124).

The mounting portion 130 is connected to the lower side of the lower body 110 in a stepped shape in multiple stages, the lower portion of the lower body 110 is a cylindrical connection portion smaller in diameter than the lower body 110 Is formed, and the lower side of this connection part is provided with the chamfered part which forms the stepped structure in the flat shape where the upper and lower surfaces were chamfered. In this case, through holes are formed at the ends of the connecting portion and the chamfering portion, respectively.

The preform 100 of the present invention having the above-described structure is mounted through the die casting (die casting) method (130), the lower body 110, the upper body 120, embossed portion 122 and hollow portion 124 ) Is formed into one integrated unit.

In general, die casting has excellent characteristics compared to other methods of mechanical properties and dimensional accuracy of the molded product, and the preform 100 of the present invention, which has undergone such a die casting process, has an external dimension almost equal to that of the finished product. Since it is manufactured in the same way, a separate precise shape processing is not necessary.

That is, the coil-shaped relief portion 122 formed on the upper body 120 of the preform 100 may be accurately molded to the original product dimension through a single die casting operation without a separate processing operation as in the prior art. Make sure

Here, the 4-slider zinc die casting method is applied in the present invention, the 4-slider zinc die casting method is different from the conventional die casting consisting of one fixed shaft and one moving shaft, in the vertical direction It means that the four driving shafts arranged at 90 degrees each can be driven and controlled independently, and die casting can be performed.

When the zinc die-casting method of the 4-slider method is applied as described above, when the preform 100 of the present invention is manufactured, mass production is possible and the variation of the cavity can be minimized.

The preform 100 manufactured by the zinc die casting method as described above may be produced as a single piece, but as shown in FIG. 2, a plurality of preforms may be produced at once by a single mold operation. Thus, the preform 100 formed through the die casting process is used after removing the unnecessary portion (R).

On the other hand, Figure 5 is a plan view showing a mobile phone antenna body manufacturing apparatus according to the present invention, and shows an apparatus configuration that can be produced as a final product of the antenna body preform 100 of the present invention produced through the die-casting process described above have. 6 is a front view showing the front structure of FIG. 5. (However, the guide wall of FIG. 5 is omitted in FIG. 6).

5 and 6, the antenna body manufacturing apparatus according to the present invention is a cylinder portion 200 is provided with a fixing portion 210 is fixed to one end of the above-described antenna body preform 100 of the present invention; Guide head 230 for guiding the other end of the preform 100 on the front side of the cylinder portion 200, and a processing head equipped with a cutting tool for drilling the other end of the preform 100 And 300.

The cylinder part 200 is fixed on the auxiliary bed 360 located on the upper side of the main bed 350, and moves the fixing part 210 located on the front side in a forward and backward direction by using pneumatic or hydraulic pressure as a driving source. It is supposed to be.

Specifically, the fixing part 210 is a plate-shaped member, the upper surface portion is formed with a plurality of fixing grooves 212 to which the mounting portion 130 of the preform is fitted and fixed, the fixing portion 210 Is connected to the piston shaft 220 of the cylinder portion 200 is capable of linear movement.

At this time, the shape of the fixing groove 212 is formed in a shape corresponding to the mounting portion 130, the mounting portion 130 is fitted to the fixing groove 212 and fixed to the mounting portion 130 ) The flat chamfered portion of the rear end is engaged in the fixing groove 212 is suppressed that the preform 100 is rotated in the axial direction during the drilling process is suppressed, and at the same time drilling by the multi-stage stepped structure of the mounting portion 130 During the processing, the preform 100 is not pushed back.

A support 240 having a guide portion 230 for holding the tip of the preform 100 is fixed on the auxiliary bed 360 away from the cylinder 200.

In addition, the guide wall formed between the cylinder part 200 and the supporter 240 so that both sides and the bottom surface of the fixing part 210 may be guided when the fixing part 210 is linearly moved. 250) is installed.

The guide portion 230 is in the upper body 120 of the preform 100 to the lower body 110 in a state in which the fixed portion 210 is fixed to the preform 100 is linearly moved forward to the machining position. I will catch the part.

Therefore, when cutting the preform 100 using a drill, the rear end portion of the preform 100 is supported by the fixing portion 210 and the front end is supported by the guide portion 230. It can hold firmly without.

In addition, between the inner surface of the guide portion 230 and the outer surface of the embossed portion 122 of the preform 100 to be fitted thereto, the embossed portion 122 has a radius when drilling by the cutting tool 320 to be described later. The play of a certain error range is formed so that a certain degree of elastic deformation can be made in the direction.

In addition, a guide hole 230 is formed at one side of the guide part 230, in which an injection hole 232 through which external air or cutting oil, etc., can be injected is formed near the relief portion 122 of the preform 100 to be fitted therein. The chip generated during the drilling of the preform 100 is discharged to the outside along the space existing between the coil-shaped reliefs 122 by air or cutting oil introduced through the injection hole 232. .

On the other hand, the processing head 300 is located on the front side a predetermined distance away from the guide portion 230 is installed to be linearly moved through a predetermined transfer means not shown on the main bed 350.

In addition, the machining head 300 has a structure in which a plurality of spindles 310, which are cut by the cutting tool 320 for cutting the inner part of the preform 100, are mounted. Is rotatably driven by a driving means (not shown).

When cutting the preform 100 by the processing head 300 as described above, the cutting tool 320 is inserted into the hollow portion 124 of the preform 100 to cut the upper body 120. The part will be removed.

6 illustrates a process of forming a finished product of the antenna body by the cutting process as described above.

In addition, a cooling hole 312 is formed at the spindle 310 side of the processing head 300 holding the cutting tool 320 to supply cooling oil toward the cutting tool 320. Cooling oil may be supplied to the cutting tool 320 through the hole 312 to suppress excessive heat generation and wear of the cutting tool 320.

Meanwhile, in the present invention, the fixing part 210 to which the preform 100 is fixed has a structure capable of fixing the preform 100 to the fixing groove 212, but in addition to the above method, the preform 100 It may be adopted in a clamping method that can actively hold the mounting portion 130 of the)

In addition, in the present invention, a separate detecting means (not shown) is provided on the fixing part 210 to detect whether the preform 100 is mounted, and the mounting of the preform 100 through the detection means. If this is detected by sending a signal to the control unit to drive the cylinder 200, a structure in which the fixed portion 210, the preform 100 is fixed, can be automatically moved to the front processing position.

Hereinafter, a method for manufacturing a finished cellular phone antenna body product using the above-described antenna body preform 100 and a manufacturing apparatus thereof will be described.

7 is a flowchart illustrating a method of manufacturing a mobile phone antenna according to the present invention.

First, a raw material of zinc alloy is obtained (S510), and the obtained raw material is injected into a mold to perform zinc die casting. (S520)

At this time, the zinc die casting is applied to the above-described 4-slider zinc die casting, the preform 100 produced through the zinc die casting process is a mounting portion 130, the lower body 110, as shown in FIG. The upper body 120, the embossed portion 122 and the hollow portion 124 has a structure integrally formed in one member.

Next, when the shape of the preform 100 is formed through die casting, a barreling process is performed to remove unnecessary portions (shown in FIG. 2) attached to the outer surface of the preform 100. (S530)

Next, the preform 100 that passed through the barreling process (S530) is finally completed by removing the upper body 120 of the preform 100 by performing drilling after processing using the above-described antenna body manufacturing apparatus. An antenna body product having dimensions is manufactured. (S540)

In detail, first, when the antenna body preform 100 is inserted into the fixing groove 212 on the upper surface of the fixing part 210 of the cylinder part 200 and fixed, the sensing means (not shown) By recognizing and operating the cylinder part 200 through a control part, the preform 100 automatically moves the fixed part 210 to which it is fixed to the front side processing position.

The preform 100 thus moved to the machining position has a portion extending from the upper body 120 to the lower body 110 in the guide portion 230, and in this state, the rear end portion of the preform 100. And because the front end is supported through the fixing portion 210 and the guide portion 230, respectively, the preform 100 is maintained in a firmly fixed state without flow in all directions.

As described above, while the preform 100 is set at the machining position, the machining head 300 located at the front side moves toward the preform 100 and cuts the cutting tool 320 mounted to the machining head 300. Through the inner portion from the upper body 120 to the lower body 110 of the preform 100 is cut.

In this process, the upper body 120 of the preform 100 is completely removed through the cutting process, and finally, only the shape of the lower body 110 and the coil-shaped relief portion 122 connected thereto is left. The final antenna body is manufactured in the shape of a finished product.

At this time, even when the relief portion 122 is elastically expanded in the radial direction in the process of drilling the upper body 120 by the cutting tool 320 due to the play between the guide portion 230 and the relief portion 122 The elastic deformation of the relief portion 122 as described above can be easily absorbed.

In addition, during the cutting process, air or cutting oil is introduced through the input hole 232 formed in the guide part 230, and thus the chip generated during the cutting process is transferred to the outside through the spiral space existing between the relief parts 122. It is easily discharged.

In addition, since the cooling oil is also supplied to the cutting tool 320 through the cooling hole 312 in the processing head 300 side, the cutting tool 320 can be prevented from being severely worn while being excessively heated.

On the other hand, after the preform 100 is manufactured in the shape of a finished product through the drilling process as described above to completely remove the burrs (burr) generated in the inner portion of the embossed portion 122 during the drilling process through chemical polishing Perform the operation (S550).

Subsequently, the product of which the chemical polishing process (S550) is completed is then manufactured as a final antenna body finished product by performing a plating operation (S560).

On the other hand, the above-described antenna body preform 100 of the present invention by varying the shape of the embossed portion 122 formed on the outer surface of the upper body 120, various shape structures, such as various modifications of the present invention shown in FIG. It is possible to apply the change to the implementation.

Various modifications of the present invention shown in FIG. 8 will not be described in detail because only one embodiment of the present invention having the above-described coil-shaped reliefs is different from the shape structure of the reliefs.

According to the present invention described above, after forming the preform of the antenna body through die casting, it is possible to manufacture the finished product of the antenna body through a simple drilling process to remove the upper body of the preform by cutting processing, mass production of products This makes it possible to reduce the manufacturing cost significantly.

In addition, by applying the above-mentioned die casting method in the production of the antenna body, it is possible to manufacture an antenna body preform that almost matches the external dimensions of the finished antenna body, and to cut the various shapes as before to form a complex outer structure of the antenna body The manufacturing process through the processing steps not only can solve the inconvenience, but also has the advantage that the dimensional control of the finished product of the antenna body is very easy.

Furthermore, in the present invention, since the 4-slider zinc die casting method having four drive shafts capable of independent driving and control is applied, the productivity of the finished product can be greatly improved and the deviation of the cavity can be minimized. .

In addition, the chemical polishing process is provided after the drilling process of the antenna body preform, so that the burr generated on the inner side of the relief portion of the preform after the drilling process can be easily removed.

In addition, in forming the preform of the antenna body, since the mounting body and the lower body and the upper body formed with the embossed portion having a predetermined shape are implemented as one member, it is possible to obtain the effect of lowering the manufacturing cost and facilitating the processing.

Further, in the antenna body manufacturing apparatus, a fixing part for holding the mounting part of the preform is formed, and a guide part for holding the relief part forming part of the preform is provided on the front side of the cylinder part, so that the preform is transferred during drilling. You can get the effect of holding firmly in the rear without flow.

In addition, by providing a clearance of a certain error range between the guide portion and the embossed portion of the preform, the embossed portion can be controlled to allow elastic expansion in the radial direction during drilling of the preform, thereby completing The effect of improving the dimensional accuracy of the relief portion of the product can be obtained.

In addition, by providing an injection hole for supplying external air or cutting oil to the relief part of the preform on the guide part, the chip generated during the drilling process can be easily discharged to the outside through the spiral space of the relief part. There is.

In addition, the final finished product shape of the antenna body is obtained through one-time drilling of the preform, and a cooling hole for supplying cooling oil to the cutting tool is provided in the processing head, so that excessive heat generation of the cutting tool during the drilling is performed. There is an effect that can prevent the phenomenon and wear phenomenon.

In addition, a separate sensing means for detecting whether the preform is mounted or not is installed so that the preform is mounted on the fixed part and automatically moved to the machining position, thereby greatly improving the convenience of machining. The effect can be obtained.

Claims (6)

A preform molding step of forming a preform of an antenna body in which a mounting part, a lower body connected to the mounting part, and an upper body on which a relief portion of a predetermined shape connected to the lower body protrudes are integrated; And And a drilling processing step of removing the upper body portion of the preform by drilling to leave only the shape of the relief portion connected to the lower body. The method of claim 1, wherein the forming of the preform is carried out through die casting. Mounting unit; A lower body connected to an upper side of the mounting portion; And The upper body is made of a smaller diameter than the lower body and is connected to the upper side of the lower body, and comprises an upper body protruding a predetermined shape embossed portion connected to the lower body on the outer surface, The mounting body, the lower body and the upper body is an antenna body preform for a portable device, characterized in that formed integrally. An antenna comprising a mounting portion, a lower body integrally connected to an upper side of the mounting portion, and an upper body integrally connected to an upper side of the lower body and having an embossed portion of a predetermined shape connected to the lower body on an outer surface thereof. Body preforms; A cylinder part in which a fixing part to which the mounting part of the antenna body preform is fixed is linearly movable in the front and rear directions; A guide part disposed at a front side of the cylinder part and guiding an embossed part forming part of the preform when the cylinder part moves forward; And It includes a machining head is disposed on the front side of the guide portion, equipped with a cutting tool for removing the upper body portion of the preform by drilling to leave only the relief portion connected to the lower body of the preform An antenna body manufacturing apparatus for a portable device. The apparatus of claim 4, wherein a clearance is formed between the relief portion of the preform and the guide portion to allow elastic deformation of the relief portion. The portable apparatus as claimed in claim 4 or 5, wherein the guide part is formed with an input hole through which external air is introduced into the relief part so as to remove chips generated during drilling of the preform. Antenna body manufacturing device.

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