KR100851362B1 - Mobile Terminal - Google Patents

Abstract

A mobile terminal is disclosed. Mobile terminal of the present invention, the main board (main board) is provided therein; An external antenna detachably coupled to one side of the casing; And a contact connector provided in the main board and the external antenna, for electrically contacting the main board and the external antenna when the external antenna is coupled to the casing. According to the present invention, it is possible to prevent the interference between the external antenna and the main board to prevent the transmission and reception of radio waves, as well as to make the structure simpler and simpler to prevent the occurrence of interference with the surrounding structure in the casing. have.

Mobile, Terminal, PDA, Industrial PDA, Antenna, Finger, Main Board

Description

Mobile Terminal

1 is a perspective view of an industrial PDA according to an embodiment of the present invention.

2 is a cross-sectional view of FIG. 1.

FIG. 3 is an enlarged view of region “A” of FIG. 2 and shows an external antenna detached from a casing.

4 is a view illustrating a state in which an external antenna is coupled to a casing in FIG. 3.

* Explanation of symbols for main parts of the drawings

1: Industrial PDA 10: Casing

10a: upper casing 10b: lower casing

19: antenna support boss 20: main board

30: external antenna 40: contact connection

50: board finger 51: coupling part

53: contact portion 55: inclined portion

57: bend 60: antenna finger

62: contact section 65: finger support rib

The present invention relates to a mobile terminal, and more particularly, it is possible to prevent occurrence of radio transmission and reception disturbance due to a poor contact between an external antenna and a main board, and of course, it can be manufactured in a simpler and simpler structure so that the casing The present invention relates to a mobile terminal capable of preventing the occurrence of interference with surrounding structures.

In general, a mobile terminal is a terminal that can be used freely while moving regardless of a place. Representative examples thereof include a mobile communication terminal such as a mobile phone and a personal digital assistant (PDA) called a personal portable terminal. Therefore, the term 'mobile terminal' used herein includes all of these terms, but hereinafter, the description will be limited to a personal digital assistant (PDA) for convenience of description.

In a complex and diversified society, each individual has a need to store and maintain his or her own information, and various products are currently on the market to meet such individual needs. One of them is PDA (Personal digital assistant).

PDA, also known as a pocket computer, is a generic term for a palm-sized device that has a calculation, data storage and retrieval function for personal or business use, and is often used to maintain schedule calendars and address book information.

In particular, industrial personal digital assistants (PDAs) are currently being used mainly in the logistics industry, and the market is gradually expanding.

Industrial PDA is a PDA with a variety of office functions such as barcode scanner, card payment machine, etc., which are not found in general PDA. When using an industrial PDA, it is possible to efficiently carry out delivery, data management and related tasks.

For example, insurers can carry out various insurance-related tasks such as customer information management, customer search, schedule management, counseling logbook management, anniversary search, and invoice processing. In hospitals, medical records, medical history, prescriptions, and image images and graphics such as X-rays can be entered and retrieved by an industrial PDA carried by medical personnel without time and place restrictions. The police officers are allowed to work on their mobile phones through industrial PDAs, allowing them to immediately pay the financial institutions the violations of traffic laws that can be paid only 2-3 days after the crackdown. It can dramatically shorten.

On the other hand, such an industrial PDA is provided with an antenna for transmitting and receiving radio waves. In some cases, an internal antenna is used, but in most cases an external antenna is used to improve wireless sensitivity.

In the case of an external antenna, an antenna finger made of metal is provided at an insertion end inserted into the casing. The antenna finger serves to transmit and receive radio waves by contacting the main board provided in the casing when the external antenna is coupled to the casing.

By the way, in a conventional PDA having an external antenna among these conventional mobile terminals, even if the external antenna is coupled to the casing, due to the structural limitations of the antenna finger, the antenna finger is not in contact with the main board or with the main board. There is a high possibility of causing poor contact, causing a problem in the transmission and reception of radio waves. However, if the antenna finger is excessively bent or complicatedly manufactured, the antenna finger may not be easily manufactured, and as the overall appearance volume of the antenna finger increases, interference with surrounding structures in the casing may be caused. There is a high possibility that another problem will occur.

An object of the present invention, it is possible to prevent the interference of the transmission and reception of the radio wave due to poor contact between the external antenna and the main board, as well as to be manufactured in a simpler and simpler structure to prevent the occurrence of interference with the surrounding structure in the casing. It is to provide a mobile terminal that can.

The above object, according to the present invention, the main board (main board) is provided therein; An external antenna detachably coupled to one side of the casing; And a contact connector provided on the main board and the external antenna, the contact connector electrically connecting the main board and the external antenna when the external antenna is coupled to the casing. do.

Here, the contact connecting portion, a board finger (board finger) electrically connected to the main board; And an antenna finger electrically connected to the external antenna, wherein the board finger and the antenna finger are elastically contacted and released from each other.

The board finger may have a spring shape that elastically contracts and relaxes in a horizontal direction in a direction in which the external antenna is coupled to the casing.

The board finger, the coupling portion coupled to the main board; A contact portion in contact with the antenna finger; And an inclined portion connecting the coupling portion and the contact portion to be inclined with each other.

At the exposed end of the contact portion, a bent portion bent upwardly upward with respect to the direction in which the external antenna is coupled to the casing may be further formed.

An area where the coupling part, the contact part, and the inclined part contact each other may be rounded.

The coupling part, the contact part, the inclined part and the bent part may be integrally manufactured by a single material.

The coupling portion may have a relatively larger surface area than the contact portion.

The coupling part may be fixed to the main board by surface mounting technology (SMT).

The antenna finger may have a wave shape repeated in the forward and backward directions along the direction in which the external antenna is coupled to the casing, and the antenna finger may have a contact section in surface contact with the contact portion.

The wave shape may be formed by a trapezoidal structure repeated in the forward and backward directions, and the contact section may be formed by any one upper side of the trapezoidal structure.

The contact section formed by the upper side of the trapezoidal structure and the contact portion may be formed substantially in parallel.

The front edge area of the upper side in contact with the bent portion may be rounded.

Finger supporting ribs supporting the antenna finger may be further formed in the casing.

The casing may include an upper and a lower casing that are detachably coupled to each other, the main board is coupled to the upper casing, and the external antenna is coupled to the lower casing through an antenna support boss formed on the lower casing. Can be.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

The present invention can be applied to various types of mobile phones and mobile terminals such as personal digital assistants (PDAs) including flip-flops or clamshells regardless of their types. Hereinafter, the description will be made by applying to an industrial PDA mainly manufactured in a flip type.

1 is a perspective view of an industrial PDA according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is an enlarged view of region “A” of FIG. 2, with the external antenna separated from the casing. 4 is a view of the external antenna is coupled to the casing in FIG.

As shown in these figures, the industrial PDA 1 according to the present embodiment has a casing 10 having upper and lower casings 10a and 10b detachably coupled to each other, and an upper casing 10a side. The main board 20 coupled to the main board 20 and the external antenna 30 detachably coupled to one side of the lower casing 10b and the main board 20 and the external antenna 30 are respectively provided and casing. When the external antenna 30 is coupled to the 10 includes a contact connecting portion 40 for electrically contacting the main board 20 and the external antenna 30.

A button hole (not shown) cut out according to the positions of the plurality of signal input buttons 12 is formed in the front lower region of the upper casing 10a to expose the plurality of signal input buttons 12 to the outside. The plurality of signal input buttons 12 are formed by the keypad unit 14, and when the keypad unit 14 is integrally coupled in the upper casing 10a, it is exposed to the outside through the button hole.

In the upper front region of the upper casing 10a, a screen opening 17 cut away to expose the liquid crystal display 16 to the outside is provided. The above-described main board 20 is provided in the upper casing 10a and in the lower region of the liquid crystal display 16. The main board 20 is in charge of various controls of the present industrial PDA 1.

The lower casing 10b is coupled to face the upper casing 10a. The lower casing 10b includes the above-mentioned main board 20 between the upper casing 10a to form a receiving space in which various internal components (not shown) are accommodated.

On the back of the lower casing 10b, a battery 18 for applying power to the main board 20 is detachably mounted. The battery 18 is accommodated on the lower casing 10b side by a separate battery cover 18a. For reference, a gasket (not shown) may be further provided between the upper and lower casings 10a and 10b to seal a space between the upper and lower casings 10a and 10b to perform a waterproof function.

The external antenna 30 is receptably coupled to the antenna support boss 19 formed on one side of the upper surface of the lower casing 10b. The external antenna 30 is partially screwed with the antenna support boss 19. Therefore, the external antenna 30 partially accommodated in the antenna support boss 19 is not arbitrarily separated or separated from the antenna support boss 19.

For reference, the external antenna 30 is a device for sending or receiving an electromagnetic wave into a space for transmitting and receiving. The transmitting and receiving antennas have the same basic principle, but may have various shapes depending on the frequency (wavelength) used. The external antenna 30 provided in the industrial PDA 1 or the like as the present embodiment is also referred to as a coaxial antenna or a sleeve antenna as a vertical antenna, and if the length thereof is 1/4 or 1/2 of the wavelength used, Although the antenna is actually too long, it is resonated using a coil or a capacitor. Such antennas have different radio sensitivity (transmission and reception) depending on the installation direction, length, and the like.

On the other hand, when the external antenna 30 is coupled to the casing 10 through the antenna support boss 19, the external antenna 30 should be electrically connected to the motherboard (20). If the external antenna 30 is not electrically connected to the main board 20 and causes a poor contact, the external antenna 30 may cause a disturbance of transmission and reception of radio waves. However, when manufacturing a complicated structure of the antenna finger 60 formed on the external antenna 30 as in the prior art, not only is it easy to manufacture, but also may cause interference with the surrounding structure in the casing 10. Can be. In this embodiment, the above problem is solved by providing the contact connecting portion 40 as follows. The contact connecting portion 40 will be described in detail with reference to FIGS. 3 and 4.

As described above, the contact connecting portion 40 is provided on the main board 20 and the external antenna 30, respectively, when the external antenna 30 is coupled to the casing 10, the main board 20 and the external antenna It serves to electrically connect the 30. The contact connector 40 includes a board finger 50 connected to the main board 20 and an antenna finger 60 connected to the external antenna 30.

The board finger 50 and the antenna finger 60 have a structure in which the board finger 50 and the antenna finger 60 are elastically contacted and released. That is, when the external antenna 30 is partially accommodated and coupled to the antenna support boss 19 of the lower casing 10b, the board finger 50 and the antenna finger 60 elastically contact each other, and the external antenna The contact is released when the 30 is separated from the antenna support boss 19.

To this end, the board finger 50 and the antenna finger 60 may be made of a material having a predetermined elastic force or may have a shape capable of providing an elastic force. In particular, in the case of the board finger 50 has a spring shape that is elastically contracted and relaxed along the transverse direction in the direction in which the external antenna 30 is coupled to the casing can provide a desired elastic force.

The board finger 50 may be coupled to the coupling part 51 coupled to the main board 20, the contact part 53 contacting the antenna finger 60, and the coupling part 51 and the contact part 53 to be inclined to each other. The inclination part 55 and the bending part 57 formed in the exposed edge part of the contact part 53 are provided.

At this time, the coupling portion 51, the contact portion 53, the inclination portion 55 and the bent portion 57 is preferably made of a single material integrally. Herein, the single material may refer to a conductive metal material that is electrically conductive.

Coupling portion 51 is a portion that is coupled to the motherboard (20). In order to prevent the board finger 50 from being easily separated from the main board 20, the larger the surface area of the coupling part 51 coupled to the main board 20, the better. However, since the surface area of the coupling part 51 may not be large indefinitely, it may be stable to have a surface area relatively larger than at least the contact part 53. However, since the present invention is not limited thereto, the surface area of the coupling part 51 may be the same as or smaller than the surface area of the contact part 53.

The coupling part 51 may be fixed to the main board 20 by a predetermined surface mounting technology (SMT). For reference, the surface mounting technology is a general term for a technology for minimizing wiring distances between components mounted on a substrate (in the present embodiment, the main board 20) for speeding up and miniaturizing a circuit. In the figure, the end portion 51a of the coupling part 51 is separated from the main board 20, but unlike the drawing, it may be mounted to contact the main board 20.

The contact portion 53 is a portion in contact with the contact section 62 of the antenna finger 60 to be described later. As will be described later, the contact portion 53 is formed to be substantially parallel to the contact section 62 of the antenna finger 60. The contact portion 53 may also be effective in preventing contact failure between the main board 20 and the external antenna 30 as the surface area of the antenna finger 60 that is in contact with the contact section 62 increases.

The inclined portion 55 is a line connecting the engaging portion 51 and the contact portion 53. Due to the inclined portion 55, the board finger 50 can have a spring-type elastic force. In order to secure a better elastic force, the area where the coupling part 51, the contact part 53, and the inclined part 55 abut each other is preferably rounded.

The bent portion 57 is provided at the exposed end of the contact portion 53, and has a shape that is bent upwards with respect to the direction in which the external antenna 30 is coupled to the casing 10. Expressed easily, the bent portion 57 is manufactured by upwardly bending the end region of the contact portion 53. The bent portion 57 is the contact section 62 of the antenna finger 60 when the external antenna 30 is partially accommodated in the antenna support boss 19 of the lower casing (10b) board finger 50 It serves to guide the movement of the antenna finger 60 to be in surface contact with the contact portion 53.

On the other hand, the antenna finger 60 has a wave shape that is repeated in the forward and reverse directions along the direction in which the external antenna 30 is coupled to the casing 10. In this embodiment, the antenna finger 60 is manufactured in a trapezoidal structure repeated in the forward and reverse directions.

As described above, a contact section 62 is formed at one side of the antenna finger 60 in surface contact with the contact portion 53 of the board finger 50. The contact section 62 is formed by any one upper side 62 of the antenna finger 60 having a trapezoidal structure, and is substantially parallel to the contact portion 53 of the board finger 50.

At this time, the front edge area 62a of the upper side 62 of the antenna finger 60 forming the contact section 62 is rounded so as to be in flexible contact with the bent portion 57 of the board finger 50. . The antenna finger 60 is supported at its lower sides 66 by finger support ribs 65 formed in the lower casing 10b.

A method of assembling the external antenna 30 having such a configuration will be described with reference to FIGS. 3 and 4 as follows.

As shown in FIG. 3, the external antenna 30 is coupled to the antenna support boss 19 while the external antenna 30 is partially separated from the casing 10. That is, the external antenna 30 is rotated in one direction while accommodating the antenna support boss 19.

Then, the antenna finger 60 formed on the external antenna 30 is inserted into the casing 10. The front edge region 62a of the upper side 62 of the antenna finger 60, which is inserted and forms the contact section 62, is pushed down to the lower surface of the contact portion 53 while being pushed downward after being in flexible contact with the bent portion 57. Is headed.

In this state, when the external antenna 30 is completely coupled to the antenna support boss 19, as shown in FIG. 4, the upper side 62 of the antenna finger 60 is connected to the contact portion 53 of the board finger 50. It is completely in surface contact. In this state, the board finger 50 and the antenna finger 60 are slightly contracted with each other and elastically biased toward the other side, thereby increasing the contact coupling force. Therefore, the contact failure between the board finger 50 and the antenna finger 60 is not caused without removing the antenna, it is possible to solve the contact failure between the external antenna 30 and the main board 20.

As described above, according to the present embodiment, it is possible to prevent occurrence of radio wave transmission and reception failure due to a poor contact between the external antenna 30 and the main board 20, and of course, the casing ( 10) can prevent the occurrence of interference with the surrounding structure in the.

In the above-described embodiment, the industrial PDA has been described as an example, but the idea of the present invention can be sufficiently applied to, for example, a mobile phone in which an external antenna exists.

In the above-described embodiment, although the external antenna is provided in the lower casing, the external antenna may have the same structure.

Although the description is omitted in the above embodiment, an outer side cap of the external antenna may be further provided with a cap of an elastic material for protecting the external antenna. In this case, the cap may be manufactured integrally with the external antenna or may be separately provided and combined.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

As described above, according to the present invention, the interference between the external antenna and the main board can be prevented from occurring and the interference of radio waves can be prevented, as well as a simpler and simpler structure can be manufactured to interfere with surrounding structures in the casing. It can prevent occurrence.

Claims (15)

A casing having a main board provided therein; An external antenna detachably coupled to one side of the casing; And A board finger electrically connected to the main board, and an antenna finger electrically connected to the external antenna but elastically contacting and releasing contact with each other, wherein the external antenna is provided on the casing. And a contact connector for electrically contacting the main board and the external antenna when coupled thereto. The board finger has a spring shape that is elastically contracted and relaxed along the transverse direction in the direction in which the external antenna is coupled to the casing. delete delete The method of claim 1, The board finger, A coupling part coupled to the main board; A contact portion in contact with the antenna finger; And Mobile terminal, characterized in that it comprises an inclined portion connecting the coupling portion and the contact portion inclined mutually. The method of claim 4, wherein The exposed end of the contact portion, the mobile terminal, characterized in that the bent portion is further upwardly bent upward with respect to the direction in which the external antenna is coupled to the casing. The method of claim 5, And the area where the coupling part, the contact part, and the inclined part contact each other is rounded. The method of claim 6, The coupling portion, the contact portion, the inclined portion and the bent portion is a mobile terminal, characterized in that made by a single material. The method of claim 4, wherein And the coupling portion has a relatively larger surface area than the contact portion. The method of claim 4, wherein The coupling unit is a mobile terminal, characterized in that fixed to the main board by Surface Mounting Technology (SMT, Surface Mounting Technology). The method of claim 5, The antenna finger has a wave shape repeated in the forward and reverse directions along the direction in which the external antenna is coupled to the casing, The antenna finger is a mobile terminal, characterized in that the contact section is formed in surface contact with the contact portion. The method of claim 10, The wave shape is formed by a trapezoidal structure that is repeated in the forward and backward directions, wherein the contact section is formed by any one upper side of the trapezoidal structure. The method of claim 11, And the contact section formed by the upper side of the trapezoidal structure is formed substantially in parallel with the contact portion. The method of claim 12, The front edge area of the upper side in contact with the bent portion is characterized in that the rounding process. The method of claim 1, The casing further comprises a finger support rib for supporting the antenna finger in the casing. The method of claim 1, The casing includes upper and lower casings detachably coupled to each other, The main board is coupled to the upper casing, and the external antenna is coupled to the lower casing through an antenna support boss formed in the lower casing.

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