TWM288646U - Key structure with changeable stem or key blank - Google Patents

Key structure with changeable stem or key blank Download PDF

Info

Publication number
TWM288646U
TWM288646U TW94217024U TW94217024U TWM288646U TW M288646 U TWM288646 U TW M288646U TW 94217024 U TW94217024 U TW 94217024U TW 94217024 U TW94217024 U TW 94217024U TW M288646 U TWM288646 U TW M288646U
Authority
TW
Taiwan
Prior art keywords
key
handle
groove
joint
embryo
Prior art date
Application number
TW94217024U
Other languages
Chinese (zh)
Inventor
Yu-Rung Li
Original Assignee
Yu-Rung Li
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 Yu-Rung Li filed Critical Yu-Rung Li
Priority to TW94217024U priority Critical patent/TWM288646U/en
Publication of TWM288646U publication Critical patent/TWM288646U/en

Links

Landscapes

  • Table Equipment (AREA)

Description

M288646 > Q(t (l 案號94217024 ]汁年月〔〇日 修正 四、創作說明(1) 【新型所屬之技術領域】 ' 本創作係與一種鑰匙結構有關,特別是指一種匙柄與 鑰匙胚可任意組合變換之鑰匙,提升使用之便利性,同時 可達到減少物料的浪費,降低製作之成本者。 【先前技術】 鎖具係為生活中不可或缺之必需品,其主要功能係為 防盜及維護人身安全,舉凡門窗、置物櫃箱、交通工具等 用品,均可見鎖具運用於其中,且每一鎖具都配置有可供 丨啟閉之鑰匙。 由於鎖具之型態與結構的不同,所配置的鑰匙亦不相 同,該鑰匙主要之結構係為一可供握持之匙柄,以及可供 啟閉鎖具之鑰匙胚;一般而言,該鑰匙多為將該匙柄及胚 匙齒胚一體成型以供備用,而目前亦發展有可更換各該匙 柄及胚匙胚之組合式錄匙結構。 【新型内容】 (所欲解決之技術問題) 按,習知組合式鑰匙7 0結構,請參照第五圖,其主 丨要係由一鎖匙桿7 1及一匙柄7 2組構而成,其中於該鎖 匙桿7 1之結合端部側邊係設有若干之卡齒7 3 ,於該對 應接合之匙柄7 2底面容設有一接合孔7 4 ;藉由將具卡 廣7 3之鎖匙桿7 1結合端部迫入該匙柄7 2之接合孔 7 4内壁中,使該鎖匙桿7 1與匙柄7 2可對應相互插組M288646 > Q(t (l Case No. 94217024) Juice Year Month [Next Day Amendment 4, Creation Notes (1) [New Technology Area] 'This creation department is related to a key structure, especially a key handle and The key embryo can be combined to change the key to improve the convenience of use, and at the same time reduce the waste of materials and reduce the cost of production. [Prior Art] Locks are an indispensable necessity in life, and their main function is anti-theft. And to maintain personal safety, such as doors and windows, lockers, vehicles and other supplies, can be seen in the locks used in, and each lock is equipped with a key for opening and closing. Because of the type and structure of the lock, the The key of the configuration is also different. The main structure of the key is a handle for holding the key, and a key embryo for opening and closing the lock; in general, the key is mostly the handle and the embryo It is integrally formed for standby, and there is also a modular keying structure that can replace each of the key handles and the embryo key. [New content] (Technical problems to be solved) For the structure of the key 70, please refer to the fifth figure, the main body is composed of a lock lever 7 1 and a handle 7 2 , wherein the side of the joint end of the lock lever 7 1 is provided. a plurality of latching teeth 7 3 are provided with an engaging hole 7 4 on the bottom surface of the corresponding engaging handle 7 2; and the engaging end of the latching rod 7 1 with the card 7 7 is engaged into the engaging portion 7 2 In the inner wall of the hole 7 4, the key lever 7 1 and the key handle 7 2 can be mutually inserted into each other.

第5頁 M288646 丨案號94217024 fUn 月 π 曰 修正 匙7 7 2 該输 持啟 無謂 製鑰 〇 式錄 由一 匙8 0 鍮匙片 構成, 之徑向 依上述 2所 長度 4 ; ,該定位孔 ,藉由一栓 一飾蓋8 7 必需送入模 繁雜,且頭 易拆換該餘 善運作之空 請參 及組 8 2 3, 片體 與鍮 鎖設 設而 覆成 於更 8 1 照第六 合於該 設有一 並於表 8 1係 匙片體 定位後 成;其 型之加 換時易 ,故針 四、創作說明(2) ,俾予達組設之錄 桿7 1與塑質匙柄 變換,當不再使用 ,無法保留可供握 者之新输匙,造成 各樣之型式,對打 須花費較高之成本 另一習知組合 不’該結構主要係 8 1上之一頭部8 延伸入適當寬度及 有一轴向定位孔8 該徑向夾槽8 3中 之通孔8 5相對應 部一側外端緣配合 可省略該頭部8 2 惟該整體構件略顯 8 7之黏設,而不 構之缺憾,實有改 0者;惟,利用該 之結構5其兩者將 匙時,則需整副鑰 閉之匙柄7 2 ,需 的浪費;另,該鑰 類之商行,其進貨 結構, 體8 1 該頭部 夾槽8 該鑰匙 8 4恰 體8 6 後卡黏 具中包 部8 2 匙片體 間者。 迫緊式組合鎖匙 無法再予以拆離 匙7 0予以拋棄 重新打製兼具兩 :%胚料具有各式 及庫存之管理, 、七圖所 錄匙片體 底端向上 面中央設 可供插入 8 1另端 ,另於頭 組裝後雖 工程序, 受飾蓋 對習知結 (解決問題之技術手段) /本創作係提供一種組可變換匙柄或鑰匙胚之鑰匙結構 .,其主要包含有一匙柄,係具有預設之外形,其一側延伸 有一結合部,其内具有一結合槽,一定位孔,係橫向貫設Page 5 M288646 丨案号94217024 fUn Month π 曰 Correction key 7 7 2 The input keyless key is composed of a spoonful of 80 鍮 spoon pieces, the radial direction of the above 2 lengths 4; Hole, by means of a bolt and a decorative cover 8 7 must be fed into the mold, and the head is easy to be replaced. The space for the operation of the good work, please participate in the group 8 2 3, the body and the shackle are set to cover the other 8 1 According to the sixth combination, the one-piece sheet is positioned in Table 81. The replacement of the type is easy. Therefore, the needle 4, the creation instructions (2), and the set of the recording rod 7 1 The plastic handle change, when it is no longer used, can not retain the new key for the holder, resulting in various types, the cost of hitting a higher cost, another custom combination is not the structure is mainly on the 8 1 One of the heads 8 extends into a suitable width and has an axial positioning hole 8. The through hole 8 5 of the radial clamping groove 8 3 cooperates with the outer end edge of the corresponding portion to omit the head 8 2 but the overall member is slightly It is obvious that the glue is not fixed, but it is changed to 0. However, if the structure is used, the two keys are required. Closed handle 7 2, waste required; another, the key business, its purchase structure, body 8 1 The head clip slot 8 The key 8 4 body 8 6 rear card adhesive bag part 8 2 spoon Inter-slice. The forced combination key can no longer be detached from the spoon. 7 0 is discarded and re-made. There are two: % blank material has various types and inventory management, and the bottom end of the key sheet of the seven figure is set to the upper center for insertion. 8 1 The other end, after the assembly of the head, although the work procedure, subject to the cover of the knot (the technical means of solving the problem) / This creation provides a set of key structure that can change the key handle or key embryo. It mainly contains The utility model has a handle with a preset shape, and a joint portion extending on one side thereof has a coupling groove therein, and a positioning hole is horizontally arranged

第6頁 M288646tf-M217〇24——达述W日修正 四、創作說明(3) 於該结合部;^ 输匙胚,其^側士 %為、、° σ丨 叫具有一抵止端並延設有一 嵌合部,係、< 嵌入該結合槽中’―凹溝以凹槽狀橫設於 該喪合部上,且相對應於該定位孔;#由上述構件,該嵌 合部嵌入該、结合槽,再以一接合椁由該定位孔穿設該凹溝 ,俾將該鑰匙胚固定於該匙柄上,且經由拆除該接合桿’ 則可使該鑰匙胚與該匙柄分離,而達任意組合變換匙柄與 输匙胚,同時可減少输匙胚之物料浪費。 (對照先前技 兹由以上說明得知,本創作相較先前技術,確可達到 如下之若干功效·· 1 、具使用便利性:由协士名丨儿 柄及餘匙胚錄合固冑,且==作係以組合方式將該匙 換不m %楠,楹& &易於拆解分離,故可任意組接變 換不冋之匙柄k升鑰匙使用之便利性。 2 、減少物料浪費· 士认 換鑰起時,而可保留;^有义創作於複製鑰匙時,僅更 同時可降低胚料之庫存==成;能減少物料之浪費’ 3 、匙柄具多元變介· 具而丟棄,故可長期 ·由於本創作之匙柄不因更換鎖 丨化,係增添樂趣,表現偷f用,且匙柄外觀上可作造型變 人風格’極具多元變化。 【實施方式】 首先請參照第一 可變換匙柄或輪起胚 係本創作所提供之一種 其主要包含有一匙柄 〜四圖所示 之鑰匙結構Page 6 M288646tf-M217〇24——Dashu W Day Amendment 4, Creation Instructions (3) At the joint; ^ The key embryo, whose side% is ,, ° σ丨 has a stop end and Extending a fitting portion, the system, < embedded in the coupling groove, the groove is transversely disposed on the funnel portion in a groove shape, and corresponds to the positioning hole; # by the above member, the fitting portion Embedding the coupling groove, and passing the groove through the positioning hole by a joint 俾, fixing the key blank to the key handle, and removing the joint rod to enable the key embryo and the handle Separation, and any combination of the conversion handle and the key embryo, while reducing the material waste of the key embryo. (Compared with the previous explanations, it is known from the above description that this creation can achieve the following effects compared with the prior art. · 1 . It is convenient to use: it is recorded by the association name and the remaining key. And == for the combination of the key to change m% Nan, 楹 && easy to disassemble and separate, so can be arbitrarily assembled to change the convenience of the key handle k liter key. 2, reduce materials Waste·When the key is changed, it can be retained; ^When the creative key is created, the stock of the blank can be reduced at the same time. ==成; can reduce the waste of materials' 3, the handle is multi-variant It can be discarded for a long time. Because the key handle of this creation is not replaced by locks, it adds fun, the performance is stolen, and the appearance of the key handle can be changed into a style that is extremely diverse. First of all, please refer to the first convertible key handle or the round embryo system. This kind of key structure mainly includes a key handle to the four figure.

第7頁 M288646 案號 94217024 C[^年((月(客曰 修正 、創作說明(4) 0,及一可與該匙柄1 0上作組設變換之一鑰匙胚2 0 其中; 造型,其一側延 一結合槽1 2 ; 1 ; 2 1並延設有一 柄1 0之結合槽 嵌合部2 2上, 設之配合深度, 用技術手段及所 以敘述如下: 將該嵌合部2 2 結合部1 1相抵 3穿設該凹溝 10° 僅需將該接合桿 鑰匙胚2 0由該 可任意變換組合 1 3係以偏心設 一正確組接之方 與接合桿3 0之 該匙柄1 0 ,係可為一般創意型態之 伸有一結合部1 1 ;其内具有預定深度之 一定位孔1 3,係橫向貫設於該結合部1 該输匙胚2 0,其一側具有一抵止端 嵌合部2 2,該欲合部2 2係可後入該匙 1 2中;一凹溝2 3 ,以凹槽狀橫設於該 且其設置位置相對應於該定位孔1 3 ; > 藉由上述構件,該結合槽1 2具有預 可提供該嵌合部2 2適當之嵌入配合者。 為供進一步瞭解本創作構造特徵、運 預期達成之功效,茲將本創作使用方式加 該鑰匙胚2 0與匙柄1 0組裝時,係 嵌入該結合槽1 2,使其抵止端2 1恰與 止定位,再以一接合桿3 0由該定位孔1 2 2 ,則可將該鑰匙胚2 0固定於該匙柄 當欲變換鑰匙胚2 0或匙柄1 0時, 3 0由該定位孔1 3脫離結合,即可使該 I結合槽1 2處與該匙柄1 0分離,而達到 各該匙柄1 0與鑰匙胚2 0之功能者。 值得一提,該結合部1 1上之定位孔 .計,使該接合桿3 0穿設該凹溝2 2時具 向性;此外,各該定位孔1 3 、凹溝2 2Page 7 M288646 Case No. 94210024 C[^Years ((month (customer correction, creation description (4) 0, and one can be combined with the key handle 10 to change one of the key embryos 2 0; One side of the joint groove 1 2; 1; 2 1 and a handle 10 of the joint groove fitting portion 2 2 is provided, and the depth of the fitting is set by a technical means and is described as follows: 2 The joint portion 1 1 intersects the third groove 3 through the groove 10°. The joint rod key embryo 20 is only required to be eccentrically set by the arbitrarily changeable combination 1 3 and the spoon of the joint rod 30 The handle 10 can be a joint portion 1 1 of a general creative type; a positioning hole 13 having a predetermined depth therein is disposed transversely to the joint portion 1 and the side of the needle blank 20 Having abutting end fitting portion 2 2, the merging portion 2 2 can be inserted into the spoon 1 2; a groove 2 3 is disposed in a groove shape transversely thereto and its setting position corresponds to the positioning Hole 1 3 ; > With the above-mentioned members, the coupling groove 12 has a fitting fit that can provide the fitting portion 2 2 in advance. For further understanding of the creative construction features, It is expected that the effect achieved, when the original use of the creation of the key embryo 20 and the handle 10 is assembled, is embedded in the coupling groove 12, so that the end 2 1 is just positioned, and then a joint rod When the positioning hole 1 2 2 is used, the key blank 20 can be fixed to the key handle. When the key blank 20 or the key handle 10 is to be changed, the positioning hole 13 is detached from the positioning hole 13 The I coupling groove 12 is separated from the key handle 10 to reach the function of each of the key holder 10 and the key blank 20. It is worth mentioning that the positioning hole on the joint portion 1 is made. The engaging rod 30 has a directionality when the groove 2 2 is penetrated; in addition, each of the positioning holes 1 3 and the groove 2 2

第8頁 M288646 案號 94217024 年((月ί <日_修正 四、創作說明(5) 組接方式可為 綜上所述 」,係為一具 升鑰匙 簡化, 一實用 及成本 ,誠符 專利, 需 用之技 之功能 在本創 使用之 降低製 性高之 效益, 合新型 至為感 陳明者 術原理 作用仍 作之範 螺配、鉚合 ,本創作「 有可變換匙 便利性,據 作之成本, 組合式鑰匙 且其構成結 專利申請要 禱。 ,以上所述 ,若依本創 未超出說明 圍内,合予 、插銷緊配等等形式。 可變換匙柄或錄匙胚之输匙結構 柄及鑰匙胚功能之鑰匙結構,提 以減少物料之浪費,庫存管理的 同時可作多元造型變化,而獲致 結構,俾使整體確具產業實用性 構又未曾見於諸書刊或公開使用 件,懇請 鈞局明鑑,早曰准予 乃是本創作之具體實施例及所運 作之構想所作之改變,其所產生 書及圖式所涵蓋之精神時,均應 陳明。 ΦPage 8 M288646 Case No. 94216024 ((月 ί < day _ correction four, creation instructions (5) assembly method can be summarized above), is a simplification of a key, a practical and cost, honest The patent, the function of the technology to be used in the use of this product to reduce the high efficiency of the system, the new style of the sense of the function of the people of the Ming is still the role of the screw, riveting, the creation of the "transformable key convenience" According to the cost, the combined key and the composition of the patent application should be prayed. According to the above, if the creation does not exceed the description, the combination, the plug is tightly matched, etc. The key or the key can be changed. The key structure of the key structure handle and the key embryo function of the embryo is to reduce the waste of materials. At the same time, the inventory management can be used for multiple modeling changes, and the structure is obtained, so that the whole industry has practical structure and has not been seen in books or For the purpose of public use, please note that the application of the book and the concept of the operation of the book should be clearly stated.

第9頁 M288646 案號 94217024 今冬年ί (月(客 曰 修正 圖式簡單說明 【圖式簡單說明】 第一圖為本創作之立體外觀示意圖 第二圖為本創作之立體分解示意圖 第三圖為本創作之平面剖視圖。 第四圖為本創作之另一平面剖視圖 第五圖為習知結構一之平面剖視圖 第六圖為習知結構二之立體分解圖 第七圖為習知結構二之平面剖視圖 主要元件符號說明 [本創作 10 12 2 0 2 2 3 0 匙柄 結合槽 錄匙胚 嵌合部 接合桿 2 2 結合部 定位孔 抵止端 凹溝 0 2 4 1 3 習 _—-7 7 7 8 8 k— -______I Irill 输匙 7 1 鑰匙桿 匙柄 7 3 卡齒 接合孔 8 0 输匙 餘匙片體 8 2 頭部 徑向夾槽 8 4 定位孔Page 9 M288646 Case No. 94210024 This winter year ί (Monday (Customer Correction Diagram Simple Explanation [Simple Description] The first picture is the three-dimensional appearance of the creation. The second picture is the three-dimensional decomposition diagram of the creation. The third picture is The plan view is a plan view of the present invention. The fourth view is a plan view of a conventional structure. The sixth view is a perspective view of the conventional structure. Cross-sectional view main component symbol description [This creation 10 12 2 0 2 2 3 0 key handle combined slot key embryo fitting joint rod 2 2 joint positioning hole abutting end groove 0 2 4 1 3 __ 7 7 7 8 8 k— -______I Irill key 7 1 key lever handle 7 3 toothed engagement hole 8 0 key spoon body 8 2 head radial clamping groove 8 4 positioning hole

第10頁Page 10

第11頁Page 11

Claims (1)

M288646 案號 94217024 修正 五、申請專利範圍 1 種可變換匙柄或鑰匙胚之鑰匙結構,其主要包 含有 匙柄’係可為 一結合部;其内具有預 橫向貫設於該結合部; 般創意型態之造型,其一側延伸有 定深度之一結合槽,一定位孔,係 該嵌 橫設 旱由 1且 柄順 匙胚 提供 匙胚 匙胚 >之抵 匙胚 一鍮匙胚,其一側具有一抵 止端並 槽中, 置相對 入該結 該鑰匙 ,則可 匙柄與 項所述 槽具有 以 合部係可 於該嵌合 藉由上述 該定位孔 經由拆除 利分離, 2、 依據 之鑰匙結 該嵌合部 3、 依據 之输匙結 4、 依據 之餘匙結 止端同寬 5、 依據 之输匙結 使該接合 6、 依據 嵌入該匙 部上,且 構件,該 穿設該凹 該接合桿 而達任意 申請專利 構,其中 適當之嵌 申請專利 構,其中 申請專利 構,其中 者。 申請專利 柄之結合 其設置位 嵌合部嵌 溝,俾將 脫離結合 組合變換 範圍第1 ,該結合 入配合。 範圍第1 ’該匙柄 範圍第1 5該匙柄 延設有一 一凹溝, 應於該定 合槽,再 胚固定於 使該鑰匙 錄匙胚之 之可變換 預設之配 嵌合部, 以凹槽狀 位孔; 接合 該匙柄上 胚與該匙 输匙者。 匙柄或输 合深度, 項所述之可變換匙柄或鑰 係為創意型態之造型者。 項所述之可變換匙柄或输 結合部之寬度係與鑰匙胚 範圍第1項所述之可變換匙柄或鑰 構,其中,該結合部上之定位孔係為偏心設 桿以一預定向穿設該凹溝者。 申請專利範圍第1項所述之可變換匙柄或鑰M288646 Case No. 94210024 Amendment 5, Patent Application Scope A key structure of a convertible key handle or a key blank, which mainly includes a key handle 'can be a joint portion; and has a pre-transversely disposed at the joint portion; The shape of the creative type, one side of which has a fixed depth combined with a groove, and a positioning hole, which is provided with a horizontal cross with a stem and a handle of the embryo, and a spoon embryo , the one side has an abutting end and the groove is disposed opposite to the key, and the groove can be separated from the groove by the fitting portion, and the fitting can be separated by the positioning hole through the dismounting 2, according to the key to the fitting portion 3, according to the key knot 4, according to the remaining key end of the same width 5, according to the key knot to make the joint 6, according to the key part, and the component The arranging the concave joint rod to achieve any patent application structure, wherein the patent application structure is appropriately embedded, wherein the patent application is applied. The combination of the patented handle and the setting position of the fitting portion is embedded in the groove, and the 俾 will be separated from the combination of the combination transformation range, and the combination is matched. Range 1 'The handle handle range 1 5 The handle is extended with a groove, which should be fixed in the fixed groove, and the embryo is fixed to the matching part of the key record embryo. a groove-shaped hole; a person who engages the handle and the spoon. The key handle or the depth of the transfer, the variable handle or key described in the item is the creative shape stylist. The width of the switchable handle or the input joint is the changeable handle or key structure described in item 1 of the key blank range, wherein the positioning hole on the joint is eccentrically set to a predetermined The person who wears the groove. The convertible handle or key described in item 1 of the patent application scope 第12頁 M288646 案號 94217024 年((月 ί S 曰_ 五、申請專利範圍 匙胚之鑰匙結構,其中,各該定位孔、凹溝及接合桿之配 合可為螺配、鉚合、插銷緊配等組接方式。 ΦPage 12 M288646 Case No. 94216024 ((月 S 曰 五 五 五 五 五 申请 申请 申请 申请 申请 申请 申请 申请 申请 申请 申请 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 钥匙 钥匙 钥匙 钥匙 五 五 五 五 五 五 五 钥匙 钥匙 钥匙 钥匙 钥匙 钥匙Matching group connection method. Φ 第13頁Page 13 第3頁Page 3
TW94217024U 2005-09-30 2005-09-30 Key structure with changeable stem or key blank TWM288646U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94217024U TWM288646U (en) 2005-09-30 2005-09-30 Key structure with changeable stem or key blank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94217024U TWM288646U (en) 2005-09-30 2005-09-30 Key structure with changeable stem or key blank

Publications (1)

Publication Number Publication Date
TWM288646U true TWM288646U (en) 2006-03-11

Family

ID=37433321

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94217024U TWM288646U (en) 2005-09-30 2005-09-30 Key structure with changeable stem or key blank

Country Status (1)

Country Link
TW (1) TWM288646U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI565867B (en) * 2016-03-11 2017-01-11 呂學親 Locking device
CN113167077A (en) * 2018-05-03 2021-07-23 伊达尔·伊布拉吉莫维奇·萨利莫夫 Key and lock with holder and replaceable key core and its working method (method)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI565867B (en) * 2016-03-11 2017-01-11 呂學親 Locking device
CN113167077A (en) * 2018-05-03 2021-07-23 伊达尔·伊布拉吉莫维奇·萨利莫夫 Key and lock with holder and replaceable key core and its working method (method)

Similar Documents

Publication Publication Date Title
USD514619S1 (en) Credit card
USD520338S1 (en) Sliding lock
USD560124S1 (en) Wristwatch
USD489531S1 (en) Frame for luggage container
USD482923S1 (en) Pillow case with security pocket
USD580261S1 (en) Fastener head
USD571635S1 (en) Sash lock and keeper
TWM288646U (en) Key structure with changeable stem or key blank
USD523275S1 (en) Lounging pillow
USD538212S1 (en) Front cover for motor scooter
USD537456S1 (en) Mini-refrigerator for sports fan
USD552008S1 (en) Money clip
USD534450S1 (en) Case for a wristwatch
USD486720S1 (en) Combination lock
USD548925S1 (en) Mail box
USD554207S1 (en) Set of fruit toys
USD536950S1 (en) Sash lock
USD528400S1 (en) Escutcheon and handle for window lock
USD545103S1 (en) Locker vanity
USD477525S1 (en) Combination lock
USD515909S1 (en) Slot machine latch
USD481537S1 (en) Business card holder
USD551291S1 (en) Storage unit
USD499188S1 (en) Decorative door frame element
USD486721S1 (en) Combination lock

Legal Events

Date Code Title Description
MM4K Annulment or lapse of a utility model due to non-payment of fees