TWI246230B - Electric connector structure which can extend and rotate - Google Patents

Electric connector structure which can extend and rotate Download PDF

Info

Publication number
TWI246230B
TWI246230B TW94111435A TW94111435A TWI246230B TW I246230 B TWI246230 B TW I246230B TW 94111435 A TW94111435 A TW 94111435A TW 94111435 A TW94111435 A TW 94111435A TW I246230 B TWI246230 B TW I246230B
Authority
TW
Taiwan
Prior art keywords
slot
plug
usb
socket
stretchable
Prior art date
Application number
TW94111435A
Other languages
Chinese (zh)
Other versions
TW200637075A (en
Inventor
Han-Hsiang Chang
Original Assignee
Han-Hsiang Chang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Han-Hsiang Chang filed Critical Han-Hsiang Chang
Priority to TW94111435A priority Critical patent/TWI246230B/en
Application granted granted Critical
Publication of TWI246230B publication Critical patent/TWI246230B/en
Publication of TW200637075A publication Critical patent/TW200637075A/en

Links

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The present invention provides an electric connector structure which can extend and rotate, which is to accommodate the electric connector in a slot structure of an electronic product, in which the electric connector is electrically connected with an extended wire, and the other end of the extended wire is electrically connected to the connector interface of the electronic product, so that the electric connector can be pulled out, and rotated for an angle, and accommodated in the slot. Thus, various USB devices or IEEE 1394 devices can be plugged into the electric connector in a suitable direction for avoiding interference.

Description

12462301246230

【發明所屬之技術領域】 本發明係有關USB或IEEE 1 394等電氣連接器與電子產 品的結合構造,尤其是有關結合於筆記型電腦或桌上型 腦的USB或IEEE 1 394電氣連接器之結構。 ^ 【先前技術】 五、發明說明(1) 一般筆記型電腦或桌上型電腦大都配置有固定式的 USB或IEEE1 394插座,以供電氣連接其他周邊裝置,'如電 氣連接數位相機、列表機、鍵盤、大姆哥隨身碟、Μ p 3等 裝置。一具有USB或IEEE 1 394插頭的大姆哥隨身碟、μρ;3, 癱若直接插接USB或ΙΕΕΕ1 394插座時,由於大姆哥隨身碟、’ MP3的體積較大,會與鄰近的插座或插接在鄰近=座的插 頭產生干涉現象,甚至使插頭無法插入插座内。 - 台灣發明專利公告第568464號,揭示一種專供各種電 腦周邊設備連接使用之連接埠,尤指供11別、ϊεεε1 394、 PS2及相關電腦週邊介面連接之連接埠,使其具備連接及 傳輸訊號,其連接埠一側上設有可旋動之USB或其他電腦 週邊介面連接插頭旋轉臂,使連接插頭可呈χ、γ&ζ方向 自由旋轉使用,使連接埠可免外接線的呈多方向選擇擴充 暑使用’且不妨礙鄰近插座孔之使用。 上述連接埠與一般USB或I ΕΕΕ 1 394插座的延伸線相 同,均為插接於筆記型電腦或桌上型電腦的USB插座或 IEEE 1 3 94插座外側的獨立元件,均需另外購買配置,並 與電腦結合成-整體,#法使電腦具有完整的外型 腦的固定式USB或丨EEE1 394插座沒有插接外接擴充蟑或延電[Technical field to which the invention belongs] The present invention relates to a combined structure of an electrical connector such as USB or IEEE 1 394 and an electronic product, and more particularly to a USB or IEEE 1 394 electrical connector combined with a notebook computer or a desktop brain. structure. ^ [Prior art] 5. Description of the invention (1) Most laptops or desktop computers are usually equipped with a fixed USB or IEEE1 394 socket to supply power to other peripheral devices, such as electrical connections to digital cameras and list machines , Keyboard, USB flash drive, MP3 and other devices. A large USB flash drive with a USB or IEEE 1 394 plug, μρ; 3, if you plug directly into a USB or ΙΕΕ1 394 socket, because the large USB flash drive, 'MP3, has a larger volume, it will be connected to an adjacent outlet. Or the plug inserted in the adjacent socket will cause interference, and even prevent the plug from being inserted into the socket. -Taiwan Invention Patent Bulletin No. 568464, which discloses a port for connection of various computer peripherals, especially a port for connection of 11 types, ϊεεε1 394, PS2 and related computer peripheral interfaces, so that it has connection and transmission signals , One side of the port is provided with a rotating USB or other computer peripheral interface connection plug rotation arm, so that the connection plug can be freely rotated in the χ, γ & ζ direction, so that the port can be multi-directional without external wiring Choose to expand the use of summer 'without prejudice to the use of adjacent socket holes. The above-mentioned ports are the same as the extension cable of a general USB or I ΕΕΕ 1 394 socket. They are all independent components plugged into the USB socket of a laptop or desktop computer or the outside of the IEEE 1 3 94 socket. They must be purchased separately. And integrated with the computer into a whole-# method to make the computer have a complete appearance of the fixed USB or EEE1 394 socket is not connected to an external expansion cock or extension of electricity

第5頁 1246230 五、發明說明(2) 長線時,即無法電氣連結會引起干涉的其他 造成使用上的不方便。 您展置,而 【發明内容】 為解決其他電腦周邊裝置,在插接筆記型 型電腦的USB或IEEE 1 3 94插座時,常因外型結 知或桌上 接線間互相妨礙,不方便使用的問題, 干^步或連 本發明的主要目的,在提供一種具有;月。 氣連接器之結構,使插座可變換方向, ^轉向的電 IEEE1 394裝置插入時引起干涉。 兄…"5或 本發明的另一目的,在提供一種具有可 氣連接器之結構,使可拉伸鏟Λ+ 仲轉向的電 便使用。 冑了拉伸轉向插座與電腦結合一體,方 氣連士伸轉向的電氣連接器之結構,係使電 -電氣連接:ΐ:電子產品的一槽孔的結構’包括至少 接—延長線,延長線的另-端電氣連 旋轉-角:後被ΪΞ介面,使電氣連接器可被拉出槽孔或 ψ ψ 2 奋置於槽孔,供各種USB裝置或IEEE1394 ^。 口的方向插接電氣連接器,以達到避免干涉的要 細說的其他目的、功效,請參閱圖式及實施例,詳 【實施方式】 明,^ =化本t明白勺1 兒日月,以USB插座的實施例加以說 B ,事貫上本發明亦適用於IEEE 1 3 94插座或其他電氣連接 1246230 五、發明說明(3) 插座。请參閱圖1 A至1 D所示。本實施例係使兩個u s b插座 1 1、1 2上、下並排一起插接於筆記型電腦2 〇的一槽孔2 j 内’但其前端凸出槽孔21外,如圖1A所示。兩個插座 11、1 2分別連接延長線1 3,延長線1 3的另一端電氣連接筆 記型電腦20的USB(連接器)介面。兩個USB插座1 1、12可被 拉出或插入槽孔2 1 ’如圖1 A、1 B所示。當要變換兩個USb 插座1 1、1 2的方向時,使用者只要打開卡榫拉出兩個USB 插座1 1、1 2,旋轉9 0度使兩個u S B插座1 1、1 2左、右並排 後,再插入槽孔21内,呈如圖Η)所示的形狀,即可改變具 ►有USB插頭的USB裝置的插接型態。使USB裝置呈水平方式 插入圖1A所示的水平式的USB插槽,或使USB裝置呈垂直方 式插入圖1D所示的垂直式的USB插槽’以避免與與鄰近的 插座或插接在鄰近插座的插頭產生干涉現象。 本實施例使USB插座可拉出轉向,再以不同方向結合 筆記型電腦的槽孔,可保持筆記型電腦的,:口 方便行,,而沒有妨礙或干涉等問題。 70正仍然 t實施例的活動式USB插座,可依需要將USB插座拔 :為ί;伸線仍然與筆記型電腦電氣連結,方便結合結構 I季為特殊之具有USB插頭的USB裝置。 υδΒΛ參閱圖2A、2B所示。本發明第二實施例,係使一 穿過旋轉λ / USB插座14的延長線15 内伽,Ϊ 伸筆記型電腦40的槽孔41及樞接單元42 30可Α ί與筆記型電腦3〇的介面電氣連接。旋轉單元 3〇可為球狀、管狀或環狀,而枢接單元42為可柩接轉::單Page 5 1246230 V. Description of the invention (2) When the cable is long, it cannot be electrically connected, which will cause interference and cause inconvenience in use. You are exhibiting, and [inventive content] To solve other computer peripherals, when plugging in a USB or IEEE 1 3 94 socket of a notebook computer, it is often inconvenient to use due to the appearance or the wiring between the desktops. The problem, step or even the main purpose of the present invention, is to provide a device that has: months. The structure of the air connector enables the socket to change direction, and the electric IEEE1 394 device that is turned causes interference when inserted. Brother ... " 5 or another object of the present invention is to provide a structure having a pneumatic connector to make a stretchable shovel Λ + secondary steering electric.胄 The structure of the electrical connector that integrates the extension steering socket and the computer, and the power connector is connected to the electric and electrical connection: ΐ: The structure of a slot of electronic products' includes at least the extension cord The other end of the cable is electrically connected with the rotation-angle: the back quilt interface allows the electrical connector to be pulled out of the slot or ψ ψ 2 and placed in the slot for various USB devices or IEEE1394 ^. Plug the electrical connector in the direction of the mouth to achieve other purposes and effects to avoid elaboration. Please refer to the drawings and the examples. Detailed [implementation method], ^ = 化 本 t understand spoon 1 Taking the example of the USB socket as B, the present invention is also applicable to the IEEE 1 94 socket or other electrical connection 1246230. 5. Description of the invention (3) socket. See Figures 1 A to 1 D. In this embodiment, the two USB sockets 11 and 12 are inserted side by side in a slot 2 j of the notebook computer 20, but the front ends of the slots protrude outside the slot 21, as shown in FIG. 1A. . The two sockets 11 and 12 are respectively connected to an extension cable 13 and the other end of the extension cable 1 3 is electrically connected to a USB (connector) interface of the notebook computer 20. The two USB sockets 1 1 and 12 can be pulled out or inserted into the slot 2 1 ′ as shown in FIGS. 1A and 1B. When changing the direction of the two USb sockets 1 1 and 1 2, the user only needs to open the latch and pull out the two USB sockets 1 1 and 1 2 and rotate 90 degrees to make the two u SB sockets 1 1 and 1 2 left After inserting the right side by side, insert it into the slot 21 and take the shape shown in Figure Η), you can change the plug-in type of the USB device with a USB plug. Insert the USB device horizontally into the horizontal USB slot shown in FIG. 1A, or insert the USB device vertically into the vertical USB slot shown in FIG. 1D to avoid contact with adjacent sockets or plugs. Interference from plugs adjacent to the socket. In this embodiment, the USB socket can be pulled out and turned, and then combined with the slot of the notebook computer in different directions, which can keep the notebook computer's mouth convenient, without interference or interference. The 70 is still the movable USB socket of the embodiment, and the USB socket can be unplugged as needed: the extension cable is still electrically connected to the notebook computer, and the structure is convenient. The first quarter is a special USB device with a USB plug. υδΒΛ is shown in Figs. 2A and 2B. In the second embodiment of the present invention, an extension line 15 passing through the rotating λ / USB socket 14 is used to extend the slot 41 and the pivot unit 42 30 of the notebook computer 40 and the notebook computer 30. Interface for electrical connections. The rotation unit 30 can be spherical, tubular or ring-shaped, while the pivot unit 42 can be turned :: single

第7頁 1246230Page 7 1246230

元30之凹槽。將usb插座14插入筆記型電腦40的槽孔41, f框接單元42樞接旋轉單元30,即可使USB插座14旋轉任 意角度,供各種具有USB插頭的USB裝置以適合的方向插接 USB插座1 4,以達到避免干涉的要求。 本貫施例可旋轉式U S B插座,可以是一或兩個相疊之 USB插座結合於一樞接單元,當要使具有USB插頭的USB裝 置插接筆記型電腦的USB插座時,可依需要旋轉USb插座的 方向,以符合不同方向的需求。 印參閱圖3 A至3 C所示。本發明第三實施例係使圖1 a所 •示的筆圮型電腦2〇另具有一槽孔22。槽孔22可結合一蓋體 23。槽孔22内容置一USB插頭50。USB插頭50具有一延長線 51,可伸出槽孔22外結合一USB周邊裝置6〇。USB插頭50的 • L長線5 1電氣連接筆記型電腦2 q的usb介面、或結合另一 USB插頭,而該另一USB插頭插接隱藏於槽孔22内的一USB 插座。 本實施例附内藏之USB插頭之筆記型電腦,可依需要 拉出USB插頭使用,不用時藏在蓋體内,較不佔空間,但 較方便電氣連接具有USB插座的USB裝置。 _ 以上所°己載,僅為利用本發明技術内容之實施例,任 何熟悉本項技藝者運用本發明所為之修錦、變化,皆屬本 發明主張之專利範圍,而不限於實施例所揭示者。The groove for element 30. Insert the USB socket 14 into the slot 41 of the notebook computer 40, and the f-frame connection unit 42 is pivotally connected to the rotation unit 30, so that the USB socket 14 can be rotated at any angle for various USB devices with USB plugs to connect the USB in a suitable direction Socket 1 4 to meet the requirements to avoid interference. In this embodiment, the rotatable USB socket can be one or two overlapping USB sockets combined with a pivoting unit. When a USB device with a USB plug is to be connected to a USB socket of a notebook computer, it can be used as required. Rotate the direction of the USb socket to meet the needs of different directions. Refer to Figures 3A to 3C. In the third embodiment of the present invention, the pen-type computer 20 shown in FIG. The slot 22 can be combined with a cover 23. A USB plug 50 is disposed in the slot 22. The USB plug 50 has an extension cable 51 that can extend out of the slot 22 to connect a USB peripheral device 60. The USB plug 50's L long wire 5 1 is electrically connected to the USB interface of the notebook computer 2 or combined with another USB plug, and the other USB plug is connected to a USB socket hidden in the slot 22. In this embodiment, a notebook computer with a built-in USB plug can be used by pulling out the USB plug as needed, and it is hidden in the cover when not in use, which takes up less space, but is more convenient to electrically connect a USB device with a USB socket. _ The above is only an embodiment that uses the technical content of the present invention. Anyone familiar with the art using the invention to modify and change it is within the scope of the patent claimed by the present invention, and is not limited to the embodiments. By.

1246230 圖式簡單說明 【圖式簡單說明】 圖1A-1D為本發明第一實施例變換USB插座方向的示意圖 圖2A、2B為本發明第二實施例變換USB插座方向的示意 圖。 圖3A、3B為本發明第三實施例USB插頭伸出槽孔外結合_ USB裝置的示意圖。 【主要元件符號說明 11、12、14 UAB 插座 20、40筆記型電腦 蓋體 30 旋轉單元 5 0 U S B插頭1246230 Schematic description [Schematic description] Figures 1A-1D are schematic diagrams of changing the direction of the USB socket in the first embodiment of the present invention. Figures 2A and 2B are schematic diagrams of changing the direction of the USB socket in the second embodiment of the present invention. 3A and 3B are schematic diagrams of a USB plug protruding out of a slot to join a USB device according to a third embodiment of the present invention. [Description of main component symbols 11, 12, 14 UAB sockets 20, 40 Notebook computers Lid 30 Rotating unit 5 0 U S B plug

1 3、1 5、5 1 延長線 21 、22 、41才曹子L 42 樞接單元 60 USB裝置1 3, 1, 5, 5 1 Extension cable 21, 22, 41 Cao Zi L 42 Pivot unit 60 USB device

Claims (1)

12462301246230 :一種具有可拉伸轉向的電氣連接器之結 接器被容置於—電子產品的一槽孔的結構, 乳連接器電氣連接一延長線,該延長線的另 該電子產品的連接器介面,俾使該電氣連接 槽孔或旋轉一角度後被容置於該槽孔。 ’係使電氣連 包括至少一電 一端電氣連接 器可被拉出該 2.如申請專利範圍第i項所述之具有可 接器之結構,其中該電氣連接器、係_插座轉白的電礼連 3接圍第2項所述之具有可拉伸轉向的電氣連 接之、、ό構,其中該槽孔容置該兩個並排的插座。 ’4彼:申請專利範圍第2項所述之具有可拉伸轉向的電氣連 接^之結構,其中該至少一插座後端結合一旋轉單元,該 延長線穿過該旋轉單元,該槽孔的内側具有樞接該旋轉單 元的槐接單元。 •如申w專利範圍第2項所述之具有可拉伸轉向的電氣連 接器之結構,其中該旋轉單元係球狀、管狀及環狀中之一 者’而違樞接單元為樞接該旋轉單元之凹槽。 6. 如申請專利範圍第2項所述之具有可拉伸轉向的電氣連 接器之結構’其中該電子產品係筆記型電腦及桌上型電腦 彳ρ其中之一者。 7. 如申請專利範圍第2項所述之具有可拉伸轉向的電氣連 接器之結構’其中該插座係USB插座及ΙΕΕΕ1 394插座其中 之一者。 3 ·如申請專利範圍第1項所述之具有可拉伸轉向的電氣連 接器之結構,其中該電氣連接器係一插頭,該槽孔結合一: A connector with a stretchable steering electrical connector is housed in a slot structure of an electronic product, a milk connector is electrically connected to an extension cable, and the extension cable is another connector interface of the electronic product , The electrical connection slot is accommodated in the slot after being rotated by an angle. 'The electrical connection includes at least one electrical connector at one end which can be pulled out. 2. The structure with a connectable device as described in item i of the patent application scope, wherein the electrical connector, Lilian 3 encloses the electrical connection with stretchable steering described in item 2, and the structure, wherein the slot accommodates the two side-by-side sockets. '4: The structure of the electrical connection with stretchable steering described in item 2 of the scope of patent application, wherein the rear end of the at least one socket is combined with a rotating unit, and the extension wire passes through the rotating unit, The inside is provided with a locust joint unit pivotally connected to the rotation unit. • The structure of the electrical connector with stretchable steering as described in item 2 of the scope of patent application, wherein the rotating unit is one of a spherical, tubular and ring shape, and the pivoting unit is a pivotal connection. The groove of the rotating unit. 6. The structure of the electrical connector with stretchable steering as described in item 2 of the scope of the patent application, wherein the electronic product is one of a notebook computer and a desktop computer 彳 ρ. 7. The structure of the electrical connector with stretchable steering as described in item 2 of the scope of patent application, wherein the socket is one of a USB socket and an IEE1 394 socket. 3. The structure of the electrical connector with stretchable steering as described in item 1 of the scope of patent application, wherein the electrical connector is a plug, and the slot is combined with a 第10頁 1246230 六、申請專利範圍 蓋體。 9.如申請㈣範圍第2、3、4、5、6或?項所述之具有可拉 伸轉向的電軋連接器之結構,其中該電子產品具有另一槽 孔;該另-槽孔結合一蓋體;該槽孔内容置一具有—延長 線的USB插頭,該USB插頭的延長線係電氣連接該電氣產品 的USB介面,俾使該USB插頭伸出該槽孔外結合一USB裝 置。 I 0 ·如申清專利範圍第2、3、4、5、6或7項所述之具有可 拉伸轉向插座之結構,其中該電腦具有另一槽孔;該另一 ⑩槽孔結合一蓋體;該槽孔内容置一具有一延長線的 IEEE1 394插頭,該IEEE1 394插頭的延長線係電氣連接該電 氣產品的IEEE 1 394介面,俾使該IEEE 1 394插頭伸出該槽孔 .外結合一 IEEE1394裝置。 II ·如申請專·利範圍第2、3、4、5、6或7項所述之具有可 拉伸轉向插座之結構,其中該電子產品具有另一槽孔;該 另一槽孔結合一盖體,遠槽孔内容置一具有一延長線的 U S B插頭,該U S B插頭的延長線電氣連接另一 u S B插頭,而 該另一USB插頭插接隱藏於該另一槽孔内的一USB插座。 1 2 ·如申請專利範圍第2、3、4、5、6或7項所述之具有可 ⑩拉伸轉向插座之結構,其中該電腦具有另一槽孔;該另一 槽孔結合一蓋體;該槽孔内容置一具有一延長線的 IEEE1 394插頭,該IEEE 1 394插頭的延長線電氣連接另一 IEEE 1 394插頭,而該另一IEEE 1 394插頭插接隱藏於該另一 槽孔内的一 IEEE1 394插座。Page 10 1246230 VI. Scope of patent application Cover. 9. If the application is in the 2nd, 3rd, 4th, 5th, 6th, or 6th? The structure of the electric rolling connector with stretchable steering described in the above item, wherein the electronic product has another slot; the other-slot hole is combined with a cover; the content of the slot is a USB plug with an extension cable The extension cable of the USB plug is electrically connected to the USB interface of the electrical product, so that the USB plug protrudes out of the slot and combines a USB device. I 0 · The structure with a stretchable steering socket as described in claim 2, 3, 4, 5, 6, or 7 in which the computer has another slot; the other slot is combined with a Cover body; the slot contains an IEEE1 394 plug with an extension cable, the extension cable of the IEEE1 394 plug is electrically connected to the IEEE 1 394 interface of the electrical product, so that the IEEE 1 394 plug extends out of the slot. Combined with an IEEE1394 device. II · The structure with a stretchable steering socket as described in the patent application scope item 2, 3, 4, 5, 6, or 7 wherein the electronic product has another slot; the other slot is combined with a In the cover, a USB plug with an extension cable is placed in the far slot, and the extension cable of the USB plug is electrically connected to another u SB plug, and the other USB plug is connected to a USB hidden in the other slot. socket. 1 2 · The structure with a stretchable steering socket as described in item 2, 3, 4, 5, 6, or 7 of the scope of patent application, wherein the computer has another slot; the other slot is combined with a cover The slot contains an IEEE1 394 plug with an extension cable. The extension cable of the IEEE 1 394 plug is electrically connected to another IEEE 1 394 plug, and the other IEEE 1 394 plug is hidden in the other slot. An IEEE1 394 socket in the hole. 第11頁Page 11
TW94111435A 2005-04-12 2005-04-12 Electric connector structure which can extend and rotate TWI246230B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94111435A TWI246230B (en) 2005-04-12 2005-04-12 Electric connector structure which can extend and rotate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94111435A TWI246230B (en) 2005-04-12 2005-04-12 Electric connector structure which can extend and rotate

Publications (2)

Publication Number Publication Date
TWI246230B true TWI246230B (en) 2005-12-21
TW200637075A TW200637075A (en) 2006-10-16

Family

ID=37191365

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94111435A TWI246230B (en) 2005-04-12 2005-04-12 Electric connector structure which can extend and rotate

Country Status (1)

Country Link
TW (1) TWI246230B (en)

Also Published As

Publication number Publication date
TW200637075A (en) 2006-10-16

Similar Documents

Publication Publication Date Title
JP4676514B2 (en) Outlet structure
US7887341B2 (en) Socket assembly
TWI393309B (en) Reversable and concealable electrical power receptacle
CN103730799B (en) Combined-type adapter plug
US7445516B2 (en) Audio signal switcher
TWI467867B (en) In-wall receptacle device
WO2006108338A1 (en) A usb data-audio signal multiplexing transmission line
TWM332278U (en) Connector of flat cable
TWM339063U (en) Computer peripheral devices
TWM491197U (en) Multi-port type mini computer
TWM330612U (en) Display port for integrating images and multi-port connector of universal serial bus (USB) transmission interface
TWI246230B (en) Electric connector structure which can extend and rotate
KR20140141739A (en) Rotation OTG USB Memory Device.
TWM627091U (en) Expansion adapter with specific function IC component
CN105988515B (en) Pivot and portable electronic device
CN2809982Y (en) Electric connector structure capable of being stretched and rotated
CN217443859U (en) Expansion device with specific function IC element
CN207910205U (en) A kind of power cord and electronic equipment
CN210040802U (en) USB connector, data line and external equipment for connecting to terminal
CN206850183U (en) A kind of device that data transfer is provided for electronic equipment
TW201424168A (en) Multi-functional transfer plug
TWM408857U (en) Transmission line with a rotary joint device
TWM511137U (en) USB Type-C conversion module
TWM626638U (en) Expansion device with specific function IC component
CN103730798B (en) Combined-type adapter plug

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees