KR100314521B1 - Apparatus for conveying an antenna into/from an antenna housing in a telecomunication system - Google Patents

Abstract

PURPOSE: An apparatus for driving an antenna for a communication equipment is provided to automatically lead in/out an antenna, ensure a stable lead-in/out of the antenna, and prevent the antenna from being separated from the body. CONSTITUTION: A motor-gear assembly(150) reduces the speed of a motor at a predetermined rate and outputs the same. A roller assembly(300) is connected to an output shaft of the motor-gear assembly(150), and transfers a rotary force generated from the motor-gear assembly(150) in a longitudinal direction of an antenna(238) so as to carry the antenna(238). The output shaft(62) is coupled with a roller of the roller assembly(300) through a coupling(152). In order to stably transfer the rotary force of the motor-gear assembly(150) to the roller of the roller assembly(300), a support plate(250) for supporting the coupling(152) is interposed between the motor-gear assembly(150) and the roller assembly(300). The support plate(250) includes a long hole(252). The coupling(152) is received in the long hole(252) and stably transfers the rotary force even when there occurs an external impact.

Description

Antenna driving device for communication equipment {APPARATUS FOR CONVEYING AN ANTENNA INTO / FROM AN ANTENNA HOUSING IN A TELECOMUNICATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna driving apparatus of a communication device. In particular, in a portable radio communication device employing a slide-in antenna, the antenna is automatically drawn out of the antenna housing when the use of the radio communication device is started, and the antenna is terminated when the use is finished. A device for automatically introducing into a housing.

Today, portable wireless communication devices such as cellular phones, city phones or personal communication service (PCS) phones, both at home and abroad, generally employ a slide-in antenna. Some portable wireless communication devices in the market today still use passive antenna driving, which means that the user must manually pull out or insert the antenna when the user tries to make a call or ends a call. In order to eliminate the hassle, a growing number of mobile phones employing a method of automatically extracting and drawing antennas.

As a technique for automatically driving the antenna, there is a portable telephone invented by Shinji Takeyasu and disclosed in US Patent No. 5,497,506. In order to overcome the problem of the previous spring-loaded type antenna driving method that the antenna can be pulled out by the button operation, but the user has to push it in by hand, Shinji Takeyasu patent It is equipped with three operation switches called 'OFF', 'Standby' and 'Talk', and the antenna drive which draws antenna when 'call' is selected and pulls in when 'standby' is selected Initiate the mechanism.

However, in this method, a screw rod having a nut is formed on a rotation shaft of the motor, and a nut is formed at the lower part of the antenna so that both nuts are pulled out and pulled in and out by engaging the nuts. Since a dedicated antenna is required, there is a problem in compatibility with mobile phones currently used. In addition, no methods or measures are taken to deal with failures caused by deformation such as external disturbance forces or the bending of the antenna caused by continuous use, which may occur during the operation of the antenna. .

Accordingly, an object of the present invention is to provide an antenna driving device for a wireless communication device which can automatically pull out / retract the antenna, enable stable pull / out of the antenna, and also prevent the antenna from being separated from the main body. To provide.

1 is a perspective view of a flip type wireless communication device having an antenna driving device according to the present invention.

Figure 2 is a perspective view of the upper incision of a wireless communication device with an antenna driving device according to an embodiment of the present invention.

3 is a top cutaway view of a wireless communication device having an antenna driving device according to another embodiment of the present invention.

4 is an exploded perspective view of the motor gear assembly shown in FIG. 2.

5 is an exploded perspective view of the roller assembly shown in FIG.

6 is a cross-sectional view showing the coupling relationship of the roller assembly.

7 is a cross-sectional view of the A-A portion shown in FIG.

<Description of the code | symbol about the principal part of drawing>

100: wireless communication device 150: motor gear assembly

205: main body 207: liquid crystal display

212: operation panel 238: antenna

240: antenna housing 248: stopper

300: roller assembly 310: outer bracket

320: inner bracket 330: upper roller

340: lower roller 350, 360: tension spring

In order to achieve the above object, the present invention, in the antenna drive device for transporting the antenna for communication equipment, connected to the motor casing incorporating the motor and the rotating shaft of the motor to reduce the rotational speed of the motor at a predetermined ratio A motor-gear assembly including a reduction gear assembly including a plurality of gears to be outputted, and connected to an output shaft of the reduction gear assembly to receive a reduced rotational force, and by transmitting the reduced rotational force in a longitudinal direction of the antenna. It provides an antenna drive device comprising a roller assembly for transporting the antenna.

The antenna driving device is integrally formed at the end of the antenna, and further includes a stopper that contacts the roller assembly when the antenna is fully pulled out to prevent further pull out of the antenna.

The roller assembly is installed in a roller housing installed at a predetermined position in the antenna housing for accommodating the antenna, an upper roller installed at an upper portion of the roller housing, and a lower portion of the roller housing, and is connected to an output shaft of the reduction gear assembly and has a rotational force. It includes a lower roller receiving the. The antenna extends through the upper and lower rollers so as to be in sliding contact with the upper and lower rollers, and the antenna is easily accommodated at predetermined positions of the upper and lower rollers through which the antenna passes. A recess is formed.

The roller housing has an outer bracket having a shape of a hexahedron having one surface opened and a shape corresponding to the outer bracket, and an inner bracket coupled to the outer bracket. The front and rear surfaces of the roller bracket are provided with a pair of tension springs for elastically coupling the outer and inner brackets so that the outer and inner brackets are directed toward each other.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 illustrates a flip wireless communication device 100 in which an antenna driving device is installed according to an embodiment of the present invention. However, the automatic antenna driving apparatus according to the present invention can be applied not only to the flip type wireless communication device but also to a folder type wireless communication device or another type of wireless communication device which has been popular in recent years.

As shown in FIG. 1, the main body 205 of the wireless communication device 100 includes an operation panel provided with a 'SEND' key 208 and an 'END' key 210 indicating the communication start and end. 212), a liquid crystal display unit 207 for displaying a function of a communication device in letters or symbols and a front flip cover 206 for protecting the operation panel 212 are provided.

A speaker 209 is provided on the upper side of the operation panel 212 to transmit a sender's voice and the like, and the front flip cover 206 is provided with a microphone (not shown) for transmitting the receiver's voice. In addition, an antenna housing 240 for accommodating the antenna 238 is provided at one side of the main body 205. The antenna 238 is slidably mounted in the antenna housing 240.

2 is a perspective view illustrating an upper cut of a wireless communication device having an antenna driving device according to an embodiment of the present invention. As shown in FIG. 2, the antenna driving apparatus according to the exemplary embodiment of the present invention includes a motor-gear assembly 150 and the motor-gear assembly 150 which reduce and output a rotational speed of a motor at a predetermined ratio. It is connected to the output shaft of the motor-gear assembly 150 has a roller assembly 300 for transferring the antenna 238 by transmitting the rotational force generated in the longitudinal direction of the antenna 238.

Referring to FIG. 4, the motor-gear assembly 150 is connected to a motor casing 10 incorporating a motor 11 and a rotation shaft 12 of the motor 11 to determine a rotation speed of the motor 11. It includes a reduction gear assembly 90 composed of a plurality of gears to reduce the output ratio. The motor 11 preferably employs a coreless type small DC motor (4-6 in diameter).

The reduction gear assembly 90 is disposed on the right side of the first gear 14 to be engaged with the first gear 14 and the first gear 14 connected to the rotation shaft 12 of the motor 11. Integrally formed on the upper portion of the third gear 18, the third gear 18, which is disposed on the upper left of the second gear 16 to engage with the second gear 16, the second gear 16 The fourth gear 20, the fifth gear 22 disposed on the right side of the fourth gear 20 to be engaged with the fourth gear 20, and integrally formed on an upper portion of the fifth gear 22. The sixth gear 24, the seventh gear 26 disposed on the left side of the sixth gear 24 so as to be engaged with the sixth gear 24, and an upper portion of the seventh gear 26. The eighth gear 28 formed in the form, the ninth gear 30 disposed on the right side of the eighth gear 28 to be engaged with the eighth gear 28, integrally on the upper portion of the ninth gear 30 The tenth gear 32 is formed, and the tenth gear 32 and the system Ensure that includes an eleventh gear 34 that is disposed on the left side of the tenth gear 32.

The diameters of the fourth, sixth, eighth and tenth gears 20, 24, 28, and 32 may be the third, fifth, and seventh so as to reduce the rotational force of the motor 11 at a predetermined ratio. , And smaller than the diameters of the ninth gears 18, 22, 26, and 30. The reduction gear assembly 90 configured as described above reduces and outputs the rotational force of the motor 11 at a ratio of about 16: 1. Although eleven gears are shown in this embodiment, the number of gears may vary depending on the embodiment. That is, within the range in which the reduction ratio of 16: 1 can be maintained, the number of gears can be increased or decreased.

Gears constituting the reduction gear assembly 90 are arranged in two rows and received in the gear casing 70. That is, the center of the second gear 16 is stably supported by the first support shaft 36, and the third, fourth, seventh, eighth and eleventh gears 18, 20, 26, 28. , 34 is supported by the second support shaft 38 and is disposed coaxially on the upper left portion of the second gear 16. In addition, the fifth, sixth, ninth, and tenth gears 22, 24, 30, and 32 are supported by the third support shaft 40 and coaxially with the upper portion of the second gear 16. Is placed.

In addition, an output shaft 62 is integrally formed at a central portion of the eleventh gear 34, and the output shaft 62 extends through a through hole 72 formed at the upper left side of the gear casing 70. By being connected to the roller assembly 300, the rotational force decelerated by the reduction gear assembly 90 is transmitted to the roller assembly 300.

As shown in FIG. 2, the output shaft 62 is coupled to the roller of the roller assembly 300 through a coupling 152. The coupling 152 is supported between the motor-gear assembly 150 and the roller assembly 300 in order to stably transfer the rotational force of the motor-gear assembly 150 to the roller of the roller assembly 300. Support plate 250 is disposed to. The support plate 250 is provided with a long hole 252, the coupling 152 is seated in the long hole 252 to transmit a stable rotational force even when an external impact occurs.

3 shows a coupling 162 according to another embodiment of the present invention. Coupling 162 according to another embodiment of the present invention is made of a flexible material capable of changing the shape in the longitudinal direction. The coupling 162 is preferably built into the spring so that the tube serves as the housing of the spring, the power transmission is responsible for the spring. In this case, the installation position of the housing 80 in which the motor casing 10 and the reduction gear assembly 90 are built may be varied by changing the longitudinal shape of the coupling 162. There is an advantage that the space in the body 205 can be utilized effectively.

Referring back to FIG. 4, the inner bottom of the gear casing 70 stably supports the support shafts 38 and 40 of the gears arranged in two rows, and has a step bracket for facilitating stepwise engagement between the gears ( 50) is provided. The step bracket 50 has a space portion formed therein, a first hole 53 is formed in a first step, and a second hole (2) is formed in a second end having a position higher than the first end. 55) is formed.

The third gear 18 is mounted on the first end of the step bracket 50, and the fifth gear 22 is mounted on the second end of the step bracket 50. Therefore, the fourth gear 20 integrally formed on the third gear 18 may be engaged with the fifth gear 22. In addition, the second support shaft 38 is inserted into the first hole 53 of the step bracket 50 via the first bearing 52, and the third support shaft 40 is connected to the second bearing ( It is inserted into the second hole 55 of the step bracket 50 via the 54. As can be seen from the above, the step bracket 50 serves to stably support the coaxial arrangement of the gears while ensuring a space for the gears arranged in two rows to be alternately engaged with each other.

On the other hand, the gear casing 70 and the motor casing 10 is accommodated in the housing 80 integrally, so that storage, transportation and installation can be easily performed. The housing 80 is fixedly mounted in the main body 205 of the communication device 100 perpendicular to the longitudinal direction of the antenna 238 by a plurality of support brackets 154.

Referring back to FIG. 2, at the end of the antenna 238, a stopper 248 integrally contacting the roller assembly 300 to prevent further extraction of the antenna 238 when the antenna 238 is fully drawn out. Formed. In addition, the stopper 248 serves to prevent the antenna 238 from being separated from the main body 205 even when children are forcibly pulling the antenna 238.

Hereinafter, the configuration of the roller assembly 300 will be described in detail with reference to FIGS. 5 to 7.

As shown in detail in FIG. 5, the roller assembly 300 is installed at an upper portion of the roller housing 305 and the roller housing 305 disposed at a predetermined position in the antenna housing 240, and has a central axis ( A lower roller 330 and a lower portion of the roller housing 305, which are connected to an output shaft 62 of the reduction gear assembly 90 via a coupling 152, from the output shaft 62. It has a lower roller 340 having a central axis 342 that receives the rotational force.

The antenna 238 extends between the upper and lower rollers 330 and 340 to be in sliding contact with the upper and lower rollers 330 and 340. Recesses 334 and 336 are formed at predetermined positions of the upper and lower rollers 330 and 340 through which the antenna 234 passes so as to easily accommodate the antenna 238. The upper and lower rollers 330 and 340 are preferably made of rubber to maintain a predetermined elasticity and friction force with respect to the antenna 238.

The roller housing 305 has a shape corresponding to the outer bracket 310 and the outer bracket 310 having a hexahedral shape of which one surface is opened, and an inner bracket 320 coupled to the outer bracket 310. ). The outer and inner brackets 310 and 320 are made of a metal plate, it is preferable to be configured by bending assembled extruded plate.

Long holes 314 and 324 are formed at both sides of the outer and inner brackets 310 and 320 so that both ends of the central shafts 332 and 342 of the upper and lower rollers 330 and 340 are rotatably coupled, respectively. It is. In addition, the front parts of the outer and inner brackets 310 and 320 may come into contact with the stopper 248 formed at the end of the antenna 238 when the antenna 238 is fully pulled out to prevent further extraction of the antenna 238. It is.

In addition, first and second elastically coupling the outer and inner brackets 310 and 320 to the front and rear surfaces of the roller housing 305 so that the outer and inner brackets 310 and 320 are directed toward each other. Tension springs 350 and 360 are provided, respectively.

Both ends of the first tension spring 360 are respectively coupled to the coupling hole 312 formed in the upper front of the outer bracket 310 and the coupling hole 322 formed in the lower front of the inner bracket 320, respectively An annular ring portion is formed in the center portion so as not to prevent the antenna 238 from moving.

The second tension spring 360 has the same structure as the first tension spring 350, and both ends of the coupling hole 316 and the inner bracket 320 formed at an upper portion of the rear surface of the outer bracket 310. It is coupled to each of the coupling holes 326 formed in the lower rear.

Therefore, the outer and inner brackets 310 and 320 are firmly tightened toward each other by the elastic force of the first and second tension springs 350 and 360, and the force is applied to the upper and lower portions of the roller housing 305. The upper and lower rollers 330 and 340 disposed respectively, and as a result, these upper and lower rollers 330 and 340 are pressed against the antenna 238 disposed therebetween. By storing stably, reliable transfer of the antenna 238 is ensured.

6 shows a cross-sectional view of such a roller assembly 300. The upper and lower rollers 330, 340 are coupled to their central axes 332, 342 in an outsert mold manner. Here, the out-the-mold method refers to a process of first manufacturing the central shafts 332 and 342 and then integrally manufacturing the upper and lower rollers 330 and 340 of a predetermined shape through a molding operation around the outer circumference thereof. This outsert mold process ensures a tight coupling between the central axes 332, 342 and the rollers 330, 340.

In order to efficiently transmit the rotational force of the reduction gear assembly 90 to the lower roller 340, a diameter larger than the diameter of the central shaft 340 may be formed at the center of the central shaft 342 of the lower roller 340. The spline shaft 344 having is provided integrally. As shown in FIG. 7, the spline shaft 344 ensures a firm coupling between the lower roller 340 and the central axis 342, and a predetermined time passes and the lower roller 340 and the Even when the molding coupling force between the central shaft 342 is weakened, the central shaft 342 can stably transmit the rotational force to the lower roller 340 without turning.

Hereinafter, the operation mechanism of the antenna drive device having the above configuration will be described.

First, when a user operates a switch (not shown) that generates a switching signal in conjunction with an antenna operation switch, for example, the opening / closing of the flip cover 206 or the call button 208 and the end button 210, a control unit (not shown) Applies an operation signal to the motor (11). The rotational force of the motor 11 is transmitted to the reduction gear assembly 90 through the motor shaft 12, and is decelerated by the reduction gear assembly 90 at a predetermined ratio, preferably at a ratio of 16: 1.

The reduced rotational force is transmitted to the central shaft 342 of the lower roller 340 through the output shaft 62 and the coupling 152 of the reduction gear assembly 90 to rotate the lower roller 340. As the lower roller 340 rotates, the antenna 238 disposed between the upper and lower rollers 330 and 340 moves upward by the frictional force with the lower roller 340. In this case, the upper roller 330 serves to guide the antenna 238 while idling.

The antenna 238 is drawn out until the stopper 248 integrally formed at the end thereof contacts the front surface of the roller housing 305, which is a state in which the antenna 238 is completely drawn out.

The upper and lower rollers 330 and 340 are firmly supported by the roller housing 305, and also a rotational force transmitted from the gear-motor assembly 150 to the lower roller 340. Since it is stabilized by an element such as 250, efficient transfer of the antenna 238 can be carried out. This robust antenna transfer structure ensures stable transfer of the antenna 238 even when an external shock occurs while the antenna 238 is withdrawn.

On the other hand, since the operation of drawing the antenna 238 back into the antenna housing 240 after the call is completed in the reverse order of the antenna drawing operation will be omitted here. The antenna drawing operation is performed by rotating the motor 11 in reverse.

As described above, the antenna driving apparatus not only stably pulls out / retracts the antenna, but also has an advantage of preventing the antenna from being separated from the main body.

In addition, since the motor and the reduction gear assembly may be manufactured in one unit and disposed in an optimal space in the communication device, the size of the wireless communication device may be reduced.

Although the present invention is shown and described with a mobile phone as an embodiment, the present invention is not necessarily limited to the mobile phone, but is also applicable to other wireless transmitting and receiving devices and portable electronic products requiring an antenna. The present invention is not limited to the above embodiments, and various improvements and modifications are possible within the scope of the technical idea of the present invention, and those skilled in the art will recognize that such improvements or modifications also belong to the present invention.

Claims (9)

An antenna driving apparatus for transferring an antenna for a communication device, A reduction gear assembly comprising a motor casing incorporating a motor and a plurality of gears connected to a rotation shaft of the motor to reduce and output the rotation speed of the motor at a predetermined ratio, wherein the gears constituting the reduction gear assembly include: Arranged in a row and received in a gear casing, the gear casing and the motor casing are integrally received in a housing, the housing being fixedly within the body of the communication device perpendicular to the longitudinal direction of the antenna by a plurality of support brackets. A motor-gear assembly mounted; It is connected to the output shaft of the reduction gear assembly to receive a reduced rotational force, and to transfer the reduced speed by transmitting the reduced rotational force in the longitudinal direction of the antenna, in particular installed in a predetermined position in the antenna housing that accommodates the antenna A roller housing, an upper roller installed at an upper portion of the roller housing, and a lower roller installed at a lower portion of the roller housing and connected to an output shaft of the reduction gear assembly to receive rotational force, wherein the antenna includes the upper and lower portions. The roller assembly extends through the upper and lower rollers so as to be in sliding contact with the rollers, and a concave portion is formed at a predetermined position of the upper and lower rollers corresponding to the antennas to easily receive the antennas. ; And And a stopper integrally formed at the end of the antenna, the stopper contacting the roller assembly when the antenna is fully pulled out to prevent further withdrawal of the antenna. The antenna driving apparatus according to claim 1, wherein a bottom bracket of the gear casing is provided with a step bracket for stably supporting the central axis of the gears arranged in two rows and facilitating alternate stepwise engagement between the gears. . The antenna driving apparatus of claim 1, wherein the reduction gear assembly reduces the rotational force of the motor at a ratio of approximately 16: 1. The roller housing of claim 1, wherein the roller housing has an outer bracket having a shape of a hexahedron having an open surface on one side thereof, and an inner bracket having a shape corresponding to the outer bracket, and coupled to the outer bracket, Long holes are formed at both sides of the bracket so that the central axes of the upper and lower rollers are rotatably coupled, and the front and rear portions of the outer and inner brackets come into contact with a stopper formed at the end of the antenna when the antenna is fully pulled out. Antenna drive device, characterized in that to prevent the additional pull out of the antenna. The front and rear surfaces of the roller housing are each provided with a pair of tension springs for elastically coupling the outer and inner brackets so that the outer and inner brackets are directed toward each other. And the antenna is stably engaged between the upper and lower rollers by a tensile force, thereby ensuring reliable transportation of the antenna. The antenna driving apparatus of claim 7 or 8, wherein the upper and lower rollers are coupled to the center axis of the upper and lower rollers in an outsert mold manner. The spline shaft of claim 7 or 8, wherein a spline shaft having a diameter larger than the diameter of the central axis is integrally provided at the center of the central axis of the lower roller so that the rotational force of the reduction gear assembly can be efficiently transmitted to the lower roller. And the lower roller is coupled to an outer mold around the spline shaft of the lower roller in such a manner that idling of the central shaft is prevented. 9. The method of claim 7 or 8, further comprising a coupling for transmitting the rotational force of the output shaft to the central axis of the roller by engaging the output shaft of the reduction gear assembly and one end of the central shaft of the lower roller. Antenna drive device. The antenna driving apparatus of claim 1, wherein the upper and lower rollers are made of rubber so as to maintain a predetermined elasticity and friction force with respect to the antenna.