KR100639344B1 - Device for protecting battery terminal of mobile phone - Google Patents

Device for protecting battery terminal of mobile phone Download PDF

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Publication number
KR100639344B1
KR100639344B1 KR1020040070998A KR20040070998A KR100639344B1 KR 100639344 B1 KR100639344 B1 KR 100639344B1 KR 1020040070998 A KR1020040070998 A KR 1020040070998A KR 20040070998 A KR20040070998 A KR 20040070998A KR 100639344 B1 KR100639344 B1 KR 100639344B1
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KR
South Korea
Prior art keywords
battery
cover
mobile phone
terminal
step surface
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KR1020040070998A
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Korean (ko)
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KR20060022190A (en
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이광준
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0262—Details of the structure or mounting of specific components for a battery compartment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

본 발명은 휴대폰의 배터리 단자 보호장치에 관한 것으로, 휴대폰 단말기용 배터리의 배면 하단에 일정길이 형성된 단차면과; 상기 단차면 하단에 인접하여 설치된 다수의 접속단자와; 상기 접속단자를 사이에 두고 상기 단차면상에 서로 평행하게 설치된 가이드레일과; 상기 단차면이 단차지게 접하는 면으로부터 배터리 상단을 향해 연장형성된 작동홈과; 상기 가이드레일에 끼워지는 가이드홈을 갖고 상기 작동홈 속으로 출몰가능하게 배치되어 상기 단차면을 밀폐하는 덮개와; 일단은 상기 작동홈의 내면에 고정되고 타단은 상기 덮개의 선단면에 고정되는 스프링과; 상기 덮개와 간섭되게 배터리가 거치되는 충전기상에 돌출형성된 걸림돌기를 포함하여 구성된다.The present invention relates to a battery terminal protection device of a mobile phone, and a stepped surface having a predetermined length formed on the bottom of the rear surface of the battery for a mobile phone terminal; A plurality of connection terminals provided adjacent to a lower end of the step surface; A guide rail disposed parallel to each other on the step surface with the connection terminal interposed therebetween; An operation groove extending toward the top of the battery from a surface in which the step surface is stepped; A cover having a guide groove fitted to the guide rail and arranged to be sunk into the operation groove to seal the step surface; A spring having one end fixed to an inner surface of the operation groove and the other end fixed to a front end surface of the cover; It includes a locking protrusion protruding on the charger is mounted on the battery so as to interfere with the cover.

본 발명은 배터리의 접속단자를 필요한 경우만을 제외한 채 상시 밀폐하여 보호할 수 있으므로 간섭체에 의한 쇼트, 산화, 부식, 이물질의 끼임현상 등이 방지되고, 그에 따라 배터리의 파손이 억제되게 된다.The present invention can be sealed and protected at all times except the necessary connection terminal of the battery to prevent short circuit, oxidation, corrosion, pinching of foreign substances, etc. by the interference, thereby preventing damage to the battery.

휴대폰, 배터리, 접속단자, 충전기, 충전단자, 덮개Mobile phone, battery, connection terminal, charger, charging terminal, cover

Description

휴대폰의 배터리 단자 보호장치{DEVICE FOR PROTECTING BATTERY TERMINAL OF MOBILE PHONE}Battery terminal protector for mobile phones {DEVICE FOR PROTECTING BATTERY TERMINAL OF MOBILE PHONE}

도 1은 종래 기술에 따른 휴대폰용 배터리의 예시적인 사시도,1 is an exemplary perspective view of a battery for a mobile phone according to the prior art,

도 2는 종래 기술에 따른 배터리의 예시적인 구조도,2 is an exemplary structural diagram of a battery according to the prior art,

도 3은 본 발명에 따른 보호장치를 갖는 배터리의 요부 분해사시도(a) 및 그 결합상태를 보인 요부 단면도(b),3 is an exploded perspective view of a main part of a battery having a protection device according to the present invention (a) and a sectional view of a main part showing a coupled state thereof (b),

도 4는 본 발명에 따른 보호장치를 갖는 배터리가 충전되는 충전기의 외관 사시도,4 is an external perspective view of a charger in which a battery having a protection device according to the present invention is charged;

♧ 도면의 주요 부분에 대한 부호의 설명 ♧♧ description of the symbols for the main parts of the drawing ♧

100....배터리 100a,b,c,d....접속단자100 .... Battery 100a, b, c, d .... Connection terminal

110....단차면 120....가이드레일110 .... 120 steps ... Guide rail

130....작동홈 140....덮개130 .... Working groove 140 .... Cover

142....가이드홈 150....스프링142 .... Guide groove 150 .... Spring

200....충전기 200a,b,c,d....충전단자200..Charger 200a, b, c, d .... Charge terminal

210....걸림돌기210 ....

본 발명은 휴대폰의 배터리 단자 보호장치에 관한 것으로, 보다 상세하게는 비충전시에는 배터리 단자를 밀폐하도록 하고 충전시에는 개방되도록 하여 배터리 단자의 쇼트를 방지할 수 있도록 한 휴대폰의 배터리 단자 보호장치에 관한 것이다.The present invention relates to a battery terminal protection device of a mobile phone, and more particularly, to a battery terminal protection device of a mobile phone to prevent the short circuit of the battery terminal to seal the battery terminal when not charging and to open when charging. It is about.

일반적으로, 휴대폰용 배터리는 휴대폰 단말기의 배면에 착탈가능하게 구비되어 단말기에 전원을 공급하는 수단이다.In general, the mobile phone battery is a means for supplying power to the terminal is detachably provided on the back of the mobile phone terminal.

이러한 배터리는 도 1의 도시와 같이, 4개의 접속단자(10a,10b,10c,10d)를 갖는데 이중 적어도 2개의 접속단자는 충전용 전원단자이고, 나머지 2개는 예비단자로서 도 2의 도시와 같은 연성기판(20)에 회로패턴(22)이 설계되고 상기 연성기판(20)의 하단 좌우로 연결부(24)가 돌출되며 이 연결부(24)에 다수의 접속단자(10a,10b,10c,10d)들이 솔더링 기법에 의해 부착고정됨으로써 형성되게 된다.Such a battery has four connection terminals 10a, 10b, 10c, and 10d as shown in FIG. 1, wherein at least two connection terminals are charging power terminals, and the other two are spare terminals as shown in FIG. The circuit pattern 22 is designed on the same flexible substrate 20, and the connecting portion 24 protrudes from the lower left and right sides of the flexible substrate 20, and a plurality of connecting terminals 10a, 10b, 10c, and 10d are provided on the connecting portion 24. ) Are formed by fixing by soldering technique.

그런데, 이와 같은 접속단자(10a,10b,10c,10d)는 개방된 상태로 상시 유지되기 때문에 유아들이나 애완용 동물들에게 노출되었을 경우 이들은 그 특성상 상기 접속단자(10a,10b,10c,10d) 부위를 빨거나 핥게 되고 이로 인해 접속단자(10a,10b,10c,10d)가 쇼트(단락)되거나 혹은 금속성 물질과의 접촉에 의해 쇼트되면서 파손되는 문제가 유발되게 된다.However, since the connection terminals 10a, 10b, 10c, and 10d are always maintained in an open state, when they are exposed to infants or pets, the connection terminals 10a, 10b, 10c, and 10d are separated from each other. Sucking or licking causes the connection terminals 10a, 10b, 10c, and 10d to be shorted or shortened by contact with a metallic material.

뿐만 아니라, 접속단자(10a,10b,10c,10d)가 개방된 상태로 유지되기 때문에 쉽게 산화, 부식될 수 있고, 또한 이물질이 많이 끼이게 되면 충전불량을 초래하게 되는 단점도 있게 된다.In addition, since the connection terminals 10a, 10b, 10c, and 10d are kept in an open state, they may be easily oxidized and corroded. In addition, when a large amount of foreign matter is caught, there is a disadvantage in that the charging failure occurs.

그럼에도 불구하고 종래에는 이러한 문제를 해결하기 위한 수단이 제안된 바 없었다.Nevertheless, no means have been proposed in the prior art to solve this problem.

본 발명은 상술한 바와 같은 종래 기술상의 한계성을 극복하기 위해 창출된 것으로, 외부로 노출된 휴대폰 단말기용 배터리의 접속단자를 상시 밀폐시키도록 하되 충전시에는 개방되도록 하여 접속단자의 쇼트로 인한 배터리의 파손, 산화, 부식을 비롯한 이물질의 끼임현상에 따른 충전불량 등의 문제를 일거에 일소시킬 수 있도록 한 휴대폰의 배터리 단자 보호장치를 제공함에 그 목적이 있다.The present invention was created to overcome the limitations of the prior art as described above, but always to seal the connection terminal of the battery for a mobile phone terminal exposed to the outside, but to open when charging the battery of the battery due to the short of the connection terminal The object of the present invention is to provide a battery terminal protection device of a mobile phone, which can eliminate the problems such as damage, oxidation, corrosion and poor charging due to pinching of foreign substances.

본 발명은 상기한 기술적 과제를 달성하기 위하여. 휴대폰 단말기용 배터리의 배면 하단에 일정길이 형성된 단차면과; 상기 단차면 하단에 인접하여 설치된 다수의 접속단자와; 상기 접속단자를 사이에 두고 상기 단차면상에 서로 평행하게 설치된 가이드레일과; 상기 단차면이 단차지게 접하는 면으로부터 배터리 상단을 향해 연장형성된 작동홈과; 상기 가이드레일에 끼워지는 가이드홈을 갖고 상기 작동홈 속으로 출몰가능하게 배치되어 상기 단차면을 밀폐하는 덮개와; 일단은 상기 작동홈의 내면에 고정되고 타단은 상기 덮개의 선단면에 고정되는 스프링과; 상기 덮개와 간섭되게 배터리가 거치되는 충전기상에 돌출형성된 걸림돌기를 포함하는 휴대폰의 배터리 단자 보호장치를 제공함에 그 특징이 있다.The present invention to achieve the above technical problem. A stepped surface having a predetermined length formed on a lower rear surface of a battery for a mobile terminal; A plurality of connection terminals provided adjacent to a lower end of the step surface; A guide rail disposed parallel to each other on the step surface with the connection terminal interposed therebetween; An operation groove extending toward the top of the battery from a surface in which the step surface is stepped; A cover having a guide groove fitted to the guide rail and arranged to be sunk into the operation groove to seal the step surface; A spring having one end fixed to an inner surface of the operation groove and the other end fixed to a front end surface of the cover; It is characterized in that it provides a battery terminal protection device of a mobile phone including a locking protrusion protruding on a charger on which the battery is mounted so as to interfere with the cover.

이하에서는, 첨부도면을 참고하여 본 발명을 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 보호장치를 갖는 배터리의 요부 분해사시도(a) 및 그 결합상태를 보인 요부 단면도(b)이고, 도 4는 본 발명에 따른 보호장치를 갖는 배터리가 충전되는 충전기의 외관 사시도이다.Figure 3 is an exploded perspective view of the main part of the battery having a protection device according to the present invention (a) and the main part cross-sectional view (b) showing a coupled state, Figure 4 is an appearance of a charger is charged with a battery having a protection device according to the invention Perspective view.

도 3에서와 같이, 배터리(100)의 배면 하단에는 일정길이 단차면(110)이 형성된다.As shown in Figure 3, the bottom of the rear surface of the battery 100 is formed with a predetermined length step surface 110.

상기 단차면(110)에는 다수의 접속단자(100a,100b,100c,100d)가 기존과 동일한 방식으로 형성된다.A plurality of connection terminals 100a, 100b, 100c, and 100d are formed on the stepped surface 110 in the same manner as before.

그리고, 상기 단차면(110)상에는 상기 접속단자(100a,100b,100c,100d)와 간섭되지 않게 즉, 단자 외측에서 배터리(100)의 길이방향으로 한쌍의 가이드레일(120)이 상향 돌출형성된다.In addition, the pair of guide rails 120 protrude upward from the terminal 110 in the longitudinal direction of the battery 100 so as not to interfere with the connection terminals 100a, 100b, 100c, and 100d on the stepped surface 110. .

아울러, 상기 단차면(110)의 일부, 예컨대 도 3에 도시된 배터리(100)의 상부를 향하는 측이 더 연장되어 상기 배터리(100) 배면과의 사이에 작동홈(130)을 이룬다.In addition, a portion of the stepped surface 110, for example, the side facing upward of the battery 100 illustrated in FIG. 3 further extends to form the operation groove 130 between the rear surface of the battery 100.

이때, 상기 가이드레일(120)은 상기 단차면(110)이 형성된 단차부까지만 형성될 수도 있고, 필요에 따라서는 상기 작동홈(130) 내부까지 형성될 수도 있다.In this case, the guide rail 120 may be formed only up to the stepped portion where the stepped surface 110 is formed, or may be formed to the inside of the operation groove 130 as necessary.

한편, 상기 단차면(110)에는 덮개(140)가 씌워지는데 상기 덮개(140)는 상기 가이드레일(120)을 따라 슬라이딩되면서 상기 작동홈(130) 내부로 출몰될 수 있도록 설치된다.On the other hand, the stepped surface 110 is covered with a cover 140, the cover 140 is installed so that it can be sunk into the operating groove 130 while sliding along the guide rail 120.

이를 위해, 상기 덮개(140)의 하단면에는 상기 가이드레일(120)에 대응결합되는 가이드홈(142)이 요입형성된다.To this end, a guide groove 142 corresponding to the guide rail 120 is recessed on the bottom surface of the cover 140.

또한, 상기 덮개(140)의 출몰동작을 원활히 하기 위해 이 덮개(140)에 탄성복귀력을 부여하는 적어도 하나의 스프링(150)이 개재된다.In addition, at least one spring 150 is provided to impart an elastic return force to the cover 140 in order to facilitate the appearance of the cover 140.

스프링(150)은 인장스프링이 바람직하며, 그 일단은 상기 작동홈(130)의 폭 중앙에 고정되고 타단은 상기 덮개(140)의 선단면 중앙에 고정됨이 바람직하다.Spring 150 is preferably a tension spring, one end of which is fixed to the center of the width of the operating groove 130 and the other end is preferably fixed to the center of the front end surface of the cover 140.

나아가, 상기 배터리(100)를 충전하기 위해 사용되는 충전기(200)는 도 4에서와 같이, 상기 접속단자(100a,100b,100c,100d)와 대응접속될 수 있는 충전단자(200a,200b,200c,200d)가 각각 탄성을 갖고 돌출형성되고, 상기 충전단자(200a,200b,200c,200d)의 전방 소정위치에는 걸림돌기(210)가 돌출형성된다.Furthermore, the charger 200 used to charge the battery 100 is as shown in Figure 4, the charging terminal (200a, 200b, 200c) that can be connected to the connection terminal (100a, 100b, 100c, 100d) , 200d are elastically protruded, and the engaging protrusion 210 is protruded at a predetermined position in front of the charging terminals 200a, 200b, 200c, and 200d.

상기 걸림돌기(210)는 상기 단차면(110)이 갖는 단차, 즉 단차 두께만큼의 높이를 갖고 돌출되어야 하며, 바람직하기로는 그 이하로 돌출되게 하여 준다.The catching protrusion 210 should protrude with the height of the step, that is, the step thickness of the step surface 110, and preferably protrude below it.

이러한 구성으로 이루어진 본 발명의 작동관계는 다음과 같다.The operating relationship of the present invention made of such a configuration is as follows.

휴대폰 단말기를 충전하지 않을 경우에는 배터리(100)가 충전기(200)로부터 분리된 상태로 유지되게 된다.When not charging the mobile phone terminal, the battery 100 is kept separated from the charger 200.

따라서, 스프링(150)은 그 인장력을 제한하는 외력이 존재하지 않게 되므로 항상 덮개(140)를 배터리(100)의 하단부측으로 밀고 있는 상태가 되게 된다.Therefore, the spring 150 is in a state in which the cover 140 is always pushing the lower end of the battery 100 because there is no external force limiting the tensile force.

이에 따라, 상기 덮개(140)는 접속단자(100a,100b,100c,100d)를 밀폐하여 보호하고 있는 상태를 상시 유지하게 된다.Accordingly, the cover 140 always maintains the state in which the connecting terminals 100a, 100b, 100c, and 100d are sealed and protected.

이와 같은 상태로 유지되다가 사용자가 충전을 하고자 할 경우, 사용자는 배터리(100)를 휴대폰 단말기로부터 분리하여 배터리(100)만을 단독으로 충전기(200)에 거치시킬 수도 있고, 또다른 경우에는 배터리(100)를 분리하지 아니하고 휴대폰 단말기 자체를 충전기(200)에 거치시킬 수도 있게 된다.If the user wants to charge while being in this state, the user may separate the battery 100 from the mobile phone terminal and mount the battery 100 alone to the charger 200, or in another case, the battery 100 Without removing the), the mobile phone terminal itself can be mounted on the charger 200.

이때, 이 두가지의 경우 모두 본 발명 보호장치의 동작관계는 동일하다.At this time, in both cases, the operation relationship of the protection device of the present invention is the same.

배터리(100)가 충전기(200)에 안착됨과 동시에 사용자의 가압력에 의해 하방향, 즉 충전단자(200a,200b,200c,200d)가 있는 방향으로 이동되게 된다.The battery 100 is seated on the charger 200 and is moved downward by the pressing force of the user, that is, the direction in which the charging terminals 200a, 200b, 200c, and 200d are located.

이동되던 배터리(100)는 임의의 위치에 마련된 걸림돌기(210)와 그 배면 하단부에 설치된 덮개(140)의 하단이 접촉되게 된다.The moved battery 100 comes into contact with the lower end of the cover protrusion 140 installed at a lower portion of the rear side and the engaging protrusion 210 provided at an arbitrary position.

결국, 걸림돌기(210)는 그 고정상태를 유지하려고 하므로 유동성을 갖는 덮개(140)가 스프링(150)을 압축하면서 그 가이드홈(142)이 가이드레일(120)을 따라 이동되면서 배터리(100)의 작동홈(130) 내부로 유입되게 된다.As a result, the locking protrusion 210 tries to maintain its fixed state, so that the cover 140 having fluidity compresses the spring 150 while the guide groove 142 moves along the guide rail 120, thereby allowing the battery 100 to be held. Will be introduced into the working groove 130 of the.

이에 따라, 단차면(110)은 걸림돌기(210)에 걸리지 않은 상태로 하향이동되게 되며, 최종적으로 충전단자(200a,200b,200c,200d)와 접속단자(100a,100b,100c,100d)가 접속되어 충전가능한 상태로 유지되게 된다.Accordingly, the stepped surface 110 is moved downward without being caught by the locking protrusion 210, and finally, the charging terminals 200a, 200b, 200c, and 200d and the connection terminals 100a, 100b, 100c, and 100d are connected. The connection is maintained in a chargeable state.

이때, 상기 덮개(140)는 상기 접속단자(100a,100b,100c,100d)가 노출되어 충전단자(200a,200b,200c,200d)와 접속될 수 있는 정도만 밀려 올라가면되므로 그 정도의 간격에 맞추어 상기 걸림돌기(210)의 위치를 설정함이 더욱 바람직하다.In this case, the cover 140 is exposed to the connection terminal (100a, 100b, 100c, 100d) is exposed only to the extent to be pushed up to the extent that can be connected to the charging terminal (200a, 200b, 200c, 200d) It is more preferable to set the position of the locking projection (210).

충전이 완료되면 거치되었던 배터리(100)를 충전기(200)로부터 분리함으로써 덮개(140)에 가해졌던 외력이 제거되게 되고, 동시에 스프링(150)의 복귀력에 의해 덮개(140)는 원래 위치로 되돌아 오게 되며, 그 결과 상기 접속단자(100a,100b,100c,100d)는 다시 덮개(140)에 의해 밀폐되어 보호되게 된다.When the charging is completed, the external force applied to the cover 140 is removed by separating the mounted battery 100 from the charger 200, and at the same time, the cover 140 returns to its original position by the return force of the spring 150. As a result, the connection terminals 100a, 100b, 100c, and 100d are again sealed by the cover 140 to be protected.

이상에서 상세히 설명한 바와 같이, 본 발명은 배터리의 접속단자를 필요한 경우만을 제외한 채 상시 밀폐하여 보호할 수 있으므로 간섭체에 의한 쇼트, 산화, 부식, 이물질의 끼임현상 등이 방지되고, 그에 따라 배터리의 파손이 억제되게 된다.As described in detail above, the present invention can prevent the short-circuit, oxidation, corrosion, and pinching of foreign substances by the interference because the present invention can be normally sealed and protected except only when necessary for the connection terminal of the battery. Breakage is suppressed.

Claims (2)

휴대폰 단말기용 배터리의 배면 하단에 일정길이 형성되고 다수의 접속단자가 설치된 단차면과;A stepped surface having a predetermined length formed at a lower rear surface of a battery for a mobile phone terminal and having a plurality of connection terminals; 상기 접속단자를 사이에 두고 상기 단차면상에 서로 평행하게 설치된 가이드레일과;A guide rail disposed parallel to each other on the step surface with the connection terminal interposed therebetween; 상기 단차면이 단차지게 접하는 면으로부터 배터리 상단을 향해 연장형성된 작동홈과;An operation groove extending toward the top of the battery from a surface in which the step surface is stepped; 상기 가이드레일에 끼워지는 가이드홈을 갖고 충전기상의 걸림돌기와 간섭되어 상기 작동홈 속으로 출몰가능하게 배치되어 상기 단차면을 밀폐하는 덮개와;A cover having a guide groove fitted to the guide rail and disposed to be protruded into the operation groove by interfering with a locking projection on the charger to seal the step surface; 일단은 상기 작동홈의 내면에 고정되고 타단은 상기 덮개의 선단면에 고정되는 인장스프링을 포함하는 것을 특징으로 하는 휴대폰의 배터리 단자 보호장치.One end is fixed to the inner surface of the operation groove and the other end of the battery terminal protection device of the mobile phone comprising a tension spring fixed to the front end surface of the cover. 삭제delete
KR1020040070998A 2004-09-06 2004-09-06 Device for protecting battery terminal of mobile phone KR100639344B1 (en)

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