TW464894B - Handle lock device for circuit breaker - Google Patents

Abstract

This invention provide a handle lock device for circuit breaker for restraining an operating handle at an on or off position. This device has a simple structure, enables it to be held tightly by the operation handle and makes position of the handle confirmable from appearance as well. Such apparatus comprises: a handle lock device 30, provided on the opening part 1a of the circuit breaker case 1 and confined in the lock part 33 of the operating handle 20; a peg part 34, inserted in the handle hole 22a provided on the handle part 22; a molded base31 and a molded cover 32, clamping the handle part 22 from both sides; and a connecting part 35, connecting the molded base 31 to the molded cover 32; in which the molded base 31 and the molded cover 32 are mono-lithically formed with the fix maintaining mechanism 31c, 36 of the handle part 22 in clamping state, the lock part 33 is maintained in the opening part 1a while the peg part 34 is inserted in the handle hole 22a, then the connecting part 35 is bent to clamp the molded base 31 and the molded cover 32 on both sides of the handle part 22, and using the fix maintaining part 31c, 36 to hold the handle lock device 30 on the handle part 22 of the operating handle 20. Further, a U-shaped groove 33a is provided in the lock part 33 so that it is possible to confirm an illustration mark 6 representing the state of on- or off-position on the operating handle.

Description

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 46 48 9 4 A7 _____ B7____ V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a method for restricting the operating handle of a circuit breaker to an on position or an off position Handle locking device. [Traditional Technology] Figs. 9 and 10 show a conventional locking device for a handle of a circuit breaker disclosed in, for example, Japanese Patent Application Laid-Open No. 10-2415415. Fig. 9 is a perspective view showing a state before the handle lock device is installed in the circuit breaker; and Fig. 10 is a perspective view showing a state where the handle lock device is installed in the circuit breaker. An operation handle 2 is installed in the circuit breaker case 1. The operation handle 2 is composed of: a base portion 2a 'located in the circuit breaker case 1 and a handle portion 2b protruding through the opening portion la of the circuit breaker case 1. When the handle 2 is turned toward the on position or the off position, the main circuit (not shown) installed in the circuit breaker case 1 becomes a closed circuit or an open circuit. The lock cover 3 includes a cover portion 3a and a lock portion 3b. After turning the operation handle 2 to the on position or the off position, the cover portion 3a is fitted to the handle portion 2b, so that the lock portion 3b is in the opening portion 1 In the position inside a, the operation of the operation handle 2 cannot be performed, and the operation handle 2 is fixed at the on position or the off position. After the lock cover 3 is provided with a pin insertion hole 3c and a lock insertion hole 3d, the pin 4 is inserted through the pin insertion hole 3c into the through hole 2c of the handle portion 2b, and then the hook portion 5a of the lock 5 is inserted into the lock insertion hole 3d. When the above lock is added, the pin 4 is locked by the lock 5 to prevent it from falling off, so the locking cover 3 is not easy to remove. 6 series status display marks, which are engraved or printed on the surface of the base 2a. For this paper size, apply the Zhongyijia Standard (CNS) A4 specification (210 X 297 mm) ------ 1 311256 (please Read the note on the back? Matters before filling out this page)

— — — — — — — ----- I — II I 464894 Printed by A-member of the Intellectual Property Bureau of the Ministry of Economic Affairs J-Consumer Cooperative A7 V. Description of the invention (2) Marks showing the ON position and OFF position of the operation handle 2; If it is the ON position, I is displayed, and if it is the OFF position, 0 is displayed. [Problems to be Solved by the Invention] The conventional handle-stabilizing device has a structure as described above, and covers and covers the cover portion 3a on the outer porch of the handle portion 2b. The pin 4 is inserted to fix the lock cover 3 to the operation handle 2. However, there is a difference in size between the outer dimension of the handle portion 2b and the size of the fitting portion of the cover portion 3a, so there is a problem that the lock cover 3 cannot be tightly fixed to the operation handle 2. In addition, when the lock cover 3 is installed, since the state display mark on the surface of the base portion 2a of the operation handle 2 indicating the on or off position is blocked by the lock portion 3b, the operation cannot be confirmed from the outside. Problems with the on or off position of handle 2. The present invention was created by the creator to solve the problems as described above, and the purpose thereof is to provide a simple structure for tightly fixing the lock cover to the operation handle 'while simultaneously confirming the open position or the open position of the operation handle from the outside. Device handle locking device. [Means used to solve the problem] (1) The handle locking device of the present invention is a handle locking device of a circuit breaker 'for restraining an operating handle protruding from an opening portion of a circuit breaker case in an on position or an off position, and The handle portion mounted on the operation handle is characterized in that it includes: located in the opening portion and restraining the operation handle lock portion, and engaging the handle portion and positioning the handle lock device at a predetermined position of the handle portion. The engaging part and the fixed holding mechanism for holding the handle locking device on the handle part, and the above-mentioned private paper size applies the Chinese National Standard (CNS) A4 specification (2IQ X 297 public love) 2 311256 {Please read the back first Please note this page before filling in this page) W -------- Order --------- line-^ ------.------------ ------- ^ 648 94 Α7 Β7 Printing of clothing by employees 'cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs V. Invention description (3) Department' The above-mentioned engaging section and the above-mentioned fixed holding mechanism are integrated into one. (2) And in (1), the above-mentioned engaging portion is convexly provided on a surface abutting the handle portion of the handle locking device, so that the engaging portion can be inserted into and inserted into a handle hole passing through the handle portion. By. (3) And * In (1), 'The fixed holding mechanism is formed by a fixed holding hole provided in the mold base and a fixed holding projection provided in the mold cover; and the mold base and the above The mold cover system is connected by the connection portion, and “the locking portion is held in the position of the opening portion while the engaging portion is engaged with the handle portion,” and then the connection portion is bent, and the fixing and holding convex portion is fitted into the fixing. Hold hole 'to hold the handle locking device to the handle portion. (4) And 'in (3), the fixed holding convex portion has a hook portion, and after the fixed holding convex portion is inserted into the fixed holding hole, the pressing surface of the die-cast cover is crimped to the die-cast base. The dust-receiving surface engages the saturated portion at a corner where the fixed holding hole intersects with the back surface of the mold base. (5) Also, in (3) or (4), "the fixing and holding convex portion is provided with the lock installation portion"; "when the lock installation portion is installed with the lock", and the handle locking device is not easily separated from the handle portion. (6) Furthermore, in (1) to (5), 'the U-shaped groove is provided in the lock portion, and the status indicator (7) is visible from the outside, and' in (1) to (6) ' The handle locking device is made of a thermoplastic resin material. [Implementation Form J of the Invention J. Application Form 1 f Jing first read the precautions on the back before filling in this page); Ji— · ----- Order --------- line — nn If · This paper size Applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 3 311256 464894 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4) Figure 1 shows the implementation of the present invention 1 A perspective view of the handle fixing device installed in the state of the circuit breaker; (a) is an expanded perspective view showing the handle locking device; (b) is a perspective view showing the circuit breaker β in FIG. 1 (b) '20 series operation handle 'This operation handle 20 is composed of a base portion 21 located in the opening portion 1 a of the circuit breaker case 1, and a handle portion 22 ′ protruding through the opening portion la of the circuit breaker case 1, and is disposed on the A handle hole 22a of the handle portion 22 is formed. 6 is a state display mark engraved or printed on the surface of the base portion 21; when the operating handle 20 is in the on position, it represents I, and when it is in the off position, it represents 0. In Fig. 1 (a), the 30-type handle lock device is made of a thermoplastic resin material such as polybutylene terephthalate (PBT), polyethylene terephthalate (PET), and the like. Formed as one. The handle locking device 30 is composed of a die-cast base 31, a die-cast cover 32, a pressure-receiving surface 31a on the surface of the die-cast base 31, and a back surface 31b inside the die-cast base 31. The locking portion 33 for locking the operating handle 20 The U-shaped groove 33a provided in the central portion of the locking portion 33, the engaging portion 34 projecting perpendicularly from the pressure receiving surface 31a, and the fixing holding hole 31c provided in the pressure receiving surface 31a can be formed into a thin wall shape so Bend and connect the connection portion 35 of the mold base 31 and the mold cover 32, the pressing surface 32a on the surface of the mold cover 32, and two fixed holding projections 36 protruding perpendicularly from the pressing surface 32a. The hook portion 36 is formed on the fixed holding convex portion 36 so as to protrude in a zigzag shape. Fig. 2 is a perspective view showing a state in which a handle fixing device according to a first embodiment of the present invention is installed in a circuit breaker; Figure 3 shows that the handle locking device of the first embodiment of the present invention is installed on the circuit breaker. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X297 mm). (Jiang Yi matters fill in the true)

A7 -------- B7_ V. Description of the invention 〇)

The oblique view of the state ^ The bucket circle will be 矣 + your M music chart is an oblique view when it is viewed from the direction A in Fig. 3 '表示 indicates that the operation handle 2G is locked by the handle when the circuit breaker is open. The case where the device 3G is locked; (b) is the case where the operating handle 2 () is locked by the handle lock device 30 when the circuit breaker is on. Β The following uses FIG. 1 to FIG. 4 to explain the installation of the handle lock device 30 Method for operating the handle 20 of the circuit breaker β (1)-While holding the locking portion 33 on the base portion 21 in the opening portion la, the engaging portion 34 is engaged with the handle provided on the handle portion 22 Hole 22a. (Fig. 2) (2) Bend the connecting portion 35, and insert the fixed holding convex portion 36 into the fixed holding hole 31c. (3) The pressing surface 32a of the die-casting cover 32 is crimped to the pressing surface 31a of the die-casting base 31. At this time, the hook portion 36a of the fixed holding convex portion 36 is engaged with the corner portion 31d where the fixed holding hole 31c and the back surface 31b intersect, and the die-cast base 31 and the die-cast cover 32 are kept in a tight state. (Figures 3 and 4) The handle lock device 30 'as described above can be used to hold the handle lock device 30 tightly to the handle portion 22' of the operation handle 20 with a simple and low-cost structure. The operation handle 20 is restrained in an on position or an off position. Since the U-shaped groove 33a is provided in the lock portion 33, the state display mark 6 displayed on the surface of the base portion 21 can also be seen from the outside after the handle lock device is installed on the operation handle 20. Therefore, the operation handle 20 can be confirmed. It is turned on and off. In the above description, the locking portion 33 and the engaging portion 34 are arranged in the die casting < Please read the phonetic notation on the back first? (Fill in this page again)

--- Order --------- Online 丨 V Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives. This paper is printed in accordance with Chinese National Standard (CNS) A4 (210 X 297). 311256 Ministry of Economic Affairs Printed by the Intellectual Property Bureau Employee Consumer Cooperative 4648 94

V. Description of the invention (6) The base 31 'is only provided at a considerable portion of the scale cover 32, and if the engaging portion 34 and the handle holes 22a for inserting the engaging portion 34 are made into a plurality of', that is, The handle lock device 30 can be held more tightly on the handle portion 22 of the operation handle 20. Embodiment 2 Fig. 5 is a perspective view showing a state before a handle locking device according to Embodiment 2 of the present invention is installed in a circuit breaker; (a) is a perspective view showing a breakaway of the handle locking device; (b) is a perspective view Angled view of a circuit breaker. In FIG. 5 (b), 40 is an operating handle. The operating handle 40 is composed of a base portion 41 located in the opening portion la of the circuit breaker case 1, and a handle portion protruding through the opening portion la of the circuit breaker case 1. 42 is formed by inserting the following connecting rod into the existing handle hole 42a and the handle side portion 42b of the handle portion 42. 60 is a state display mark engraved or printed on the surface of the base portion 41. The operating handle 40 indicates I when the circuit breaker is in the on position and 0 when the circuit breaker is in the off position.-In Fig. 5 (a), the '50 is a handle locking device. Thermoplastic resin materials such as butylene glycol formate (PBT) and polyethylene terephthalate (PET) are integrally formed. The handle locking device 50 is composed of a die-cast base 51, a die-cast cover 52, a pressure receiving surface 51a on the surface of the die-cast base 51, and a back surface 51b 'inside the die-cast base 51 to lock the locking portion of the operating handle 40. 53, a U-shaped groove 53a disposed in the central portion of the fixed portion 53, and a U-shaped engaging portion 54 'projecting perpendicularly from the pressure receiving surface 51a is passed through the fixed holding hole 51c of the pressure receiving surface 51a, It is formed in a thin wall shape and can be bent and connected to the die casting base 51 and the die casting (please read the precautions on the back before filling this page)

This paper size applies the Chinese National Standard (CNS) A4 specification (210 x 297 mm) 6 311256 464894 A7 ____ B7 V. Description of the invention (7) The pressing part 55 of the cover 52 and the pressing of the surface of the mold cover 52 The surface 52a is formed from the pressing surface 52a perpendicularly & to form a U-shaped fixed holding convex portion 56 and a detachment preventing portion 57; the fixed holding convex portion 56 is provided with a convex shape forming a blade shape of the blade Part 56a and lock installation part 56b. Fig. 6 is a perspective view showing a state in which a handle locking device according to a second embodiment of the present invention is installed in a circuit breaker; Fig. 7 is a diagram showing a handle locking device and a lock installation according to the second embodiment of the present invention. An oblique view of the completed state of the circuit breaker. The method of mounting the handle locking device 50 to the operation handle of the circuit breaker will be described below using FIGS. 5 to 7. (1) While holding the locking portion 53 at the position of the base portion 41 in the opening portion, insert the engaging portion 54 into the handle portion 42a disposed on the handle portion 42 in the direction of the arrow shown in FIG. Snap. (2) The connecting portion 55 is bent and the fixed holding projection is inserted into the fixed holding hole 51c. (3) The pressing surface 52a of the mold cover 52 is crimped to the receiving surface 51ae of the mold base 51. At this time, the full portion 56a of the fixed holding projection 56 is engaged with the fixed holding hole 51c and intersects the back surface 51b The corner Zou (not shown), and at the same time, the anti-detachment portion 57 abuts against the handle side surface 42b ', and maintains the mold base 51 and the mold cover 52 in a tight contact state. (Figure 7) (4) The lock 5a is installed in the lock installation portion 56b. The handle lock device 50 is integrally formed as described above, so the handle lock device 50 can be tightly closed with a simple and low-cost structure. While being held on the handle portion 42 ′ of the operation handle 40, the operation handle 40 of the circuit breaker can be restrained in the on position or the off position. This paper size applies to China National Standard (CNS) A4 (210x297 mm) (Please read the precautions on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. «I f — / — — — — — — — — — — — — — — — — ^ — — I .—— 311256 A7 V. Description of the invention (S) After the 5Gm operation of the fixing device will be used, it can also be seen from the outside The state display mark 60 ′ displayed on the surface of the base portion 41 can confirm the conduction and disconnection positions of the operation handle 40. Furthermore, "after attaching the lock 5", it is not easy to remove the handle fixing device 50 'and it is possible to prevent unnecessary operation of the handle 40. Embodiment 3 FIG. 8 is a perspective view showing a state in which a handle locking device according to Embodiment 3 of the present invention is installed in a multi-pole circuit breaker; a circuit breaker in which a handle locking device 50 according to Embodiment 2 is installed is opened. A connecting rod 80 is inserted between the handle hole 42a of the handle portion of the device and the handle hole 42 & of the circuit breaker disposed adjacently, thereby connecting the handle portion 42 of the operating handle 40. Figure 8 shows the case of four poles.) Only one handle locking device 50 is installed, and the operating handle 4 of the four pole circuit breaker is simultaneously restrained in the conducting position or the breaking position. [Effect of the invention] (1) As described above, The invention of item i of the applied patent garden, because the handle locking device is integrally formed, the operation handle of the circuit breaker can be constrained to the on position or the off position with a simple and low cost structure. (2) According to the scope of the patent application According to the invention of 2 items, the handle locking device can be positioned at a predetermined position of the handle part of the operating handle by using the existing handle hole. (3) According to the invention of item 3 of the patent application scope, since the die casting base and the die casting cover The body grips the handle of the handle from both sides, so you can keep the handle fixing device tightly on the handle. ≪ Please read the precautions on the back before filling this page) LINE — .: > -----------------.—— Ί! This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 8 311256 4 b S 9 4 A7 _ B7 V. Description of the invention (9) (4) According to the invention in the patent application park No. 4, insert the fixing and holding convex part into the fixing and holding hole, and then press the pressing surface of the mold cover. It is crimped to the pressure-bearing surface of the die-casting base, so that the hook is engaged with the angle at which the fixed holding hole intersects with the back of the die-casting base. Fanyuan's invention of item 5, because the lock can be installed and the installation direction of the lock is free and unlimited, so the installation is easy, and the handle locking device can not be easily disengaged from the operating handle of the circuit breaker. (6) According to Since the invention of the 6th aspect of the patent application, since the handle locking device is installed after the operation handle, It can be displayed from the outside to the status display mark, so you can confirm the conduction and disconnection position of the operating handle. (7) According to the invention in the scope of patent application No. 7, it is made of a material that easily bends and deforms. The operating handle is easily installed on the handle locking device. [Simplified description of the drawings] Figures 1 (a) and 1 (b) show that the handle locking device according to the first embodiment of the present invention is installed on a circuit breaker. A perspective view of the previous state. Fig. 2 is a perspective view showing a completed state in which a handle locking device according to a first embodiment of the present invention is installed in a circuit breaker. Fig. 3 is a view showing a handle according to the first embodiment of the present invention. An oblique view of a state where the locking device is provided in the circuit breaker. Figs. 4 (a) and 4 (b) are perspective views when viewed from the direction of Fig. 3A. 5 (a) and 5 (b) are perspective views showing a state in which the handle lock device according to the second embodiment of the present invention is installed before the circuit breaker. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) < Please read the notes on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. ·-• K ^ 1 ^ 1 * 1 nnn I 1 1 · in ϋ ϋ ϋ nnnnl-311256 464894 A7 B7 V. Description of the invention (10) Figure 6 shows that the handle of the second embodiment of the present invention is placed on an open circuit. An oblique view of the state of the device on the way. Fig. 7 is a perspective view showing a state in which a handle lock device and a lock according to a second embodiment of the present invention are installed in a circuit breaker. Fig. 8 is a perspective view showing a state in which the handle locking device according to the third embodiment of the present invention is installed in various circuit breakers. Fig. 9 is a perspective view showing a state where a conventional handle locking device is installed before a circuit breaker. Fig. 10 is a perspective view showing a state where a conventional handle lock device is installed in a circuit breaker. [Explanation of the mark] {Please read the phonetic notation on the back? Matters refill this page}

丨 丨 I Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives 1 Circuit breaker case 1 a Opening part 5 Lock 6 '60 Status indicator 20' 40 Operating handle 21 > 41 Base part 22 '42 Handle part 22a, 42a Handle hole 30, 50 Handle locking device 3 51 51 Die-cast base 31a, 51a Pressure-receiving surface 31b > 51b Back side 31c '51c Fixed holding hole (fixed holding mechanism) 31d Corner 32, 52 Die-cast cover 32a > 52a Press Surface 33, 53 Locking portion 33a, 53a U-shaped groove 34, 54 Engaging portion 35 '55 36, 56 Linking portion fixed holding convex portion (fixed holding mechanism) 36a' 5 6a Full portion 42b Handle side portion Applicable to this paper size Closed House Standard (CNS) A4 Specification (21G X 297 Gongchu) 10 311256 Order --- Line _ V ----------------- 丨 1! ^^ 4834 A7 __B7_ Five 、 Explanation of the invention (11) 56b Lock installation part 57 Anti-dropout part 80 Connecting rod (please read the precautions on the back before filling this page) Order --- Line 丨 Intelligent Property Bureau, Ministry of Economic Affairs, Consumer Consumption Cooperation Standards apply to China National Standard (CNS) A4 (210 X 297 mm) 11 311256

Claims (1)

A8 B8 C8 D8 夂 、 Scope of patent application 1- A handle lock device of a circuit breaker is a handle lock device of a circuit breaker, which is used to install an operation handle protruding from an opening portion of a circuit breaker case to be restrained in conduction The handle part of the operating handle in the position or the disconnected position is characterized in that it includes a locking portion located in the opening and restraining the operating handle, and a locking portion that is engaged with the handle portion and positions the handle locking device on the handle portion. An engaging part at a predetermined position; and a fixing and holding mechanism for fixing and holding the handle locking device to the handle part; and forming the fixing part, the upper engaging part, and the fixing and holding mechanism as a whole β 2 ′ as applied The handle lock device of the circuit breaker of the patent model No. 1 wherein the engaging portion is convexly provided on a surface abutting the handle portion of the handle locking device, so that the engaging portion can be inserted into the handle. Department of the handle hole. 3. For the lock device of the circuit breaker of the patent application No.1, the fixed holding mechanism is composed of a fixed holding hole provided on the die-cast base and a fixed holding protrusion provided on the die-cast cover. Formed; and the mold base and the mold cover system are connected by a connection portion; after the locking portion is engaged with the handle portion while holding the lock portion in the position of the opening portion, the connection portion is bent, and (2) The fixing and holding convex portion is fitted into the fixing and holding hole to hold the handle locking device to the handle. 4. If the handle lock device of the circuit breaker of the patent application item 3, which has a hook part in the fixed holding west, insert the fixed holding protruding part into the solid (please read the precautions on the back before filling this page) ^- -------- ^ --------- I Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs II n] JI l J. ^ I This paper size applies to China National Standard (CNS) A4 (21〇x 297) 12 311256 464894 | D8 Consumer cooperation of Intellectual Property Bureau of the Ministry of Economic Affairs Du printed 6. After the patent application scope fixes the holding hole, 'press the pressing surface of the mold cover to the above mold base "Waste surface" and the hook is engaged at the corner where the fixed holding hole intersects with the back of the die-casting base "5. If the handle lock device of the circuit breaker of item 3 or item 4 of the scope of patent application Among them, a lock installation portion is provided in the fixed holding convex portion, and when a lock is installed in the lock installation portion, the handle locking device is not easily detached from the handle portion. 6_ If the handle lock device of the circuit breaker in any one of the scope of application for patents Nos. 1 to 4, the U-shaped groove is arranged in the lock part, and the status display mark can be seen from the appearance. 7. The handle lock device of a circuit breaker according to any one of the patent application parks 1 to 4, wherein the handle lock device is made of a thermoplastic resin material as a whole. 8. For the handle locking device of a circuit breaker such as the scope of the patent application, item 3 or item 4, in which a lock installation portion is provided in the fixed holding convex portion, and when the lock is installed in the lock installation portion, the handle lock device is provided. It is not easy to detach from the handle part, and the U-shaped groove is arranged on the lock part, and the status display mark can be seen from the appearance. 9. If the lock device of the circuit breaker of item 3 or item 4 of the patent application is applied, wherein the fixed holding convex part is provided with a lock installation part, when the lock is installed in the lock installation part, the handle is made The locking device is not easily detached from the handle portion, and the handle locking device is formed as a single body with a thermoplastic resin material. 10. If the handlebar of the circuit breaker of the patent application No. 3 or 4 is locked (please read the precautions on the back before filling in this page), > l-port, n ϋ ϋ ϋ. II t ^ II-HI Bn-n 1 I-I nn-n--. n Unprinted paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 13 311256 rar b4 «y4 AS B8 C8 D8 Six The scope of the patent application includes 'where * the fixed retaining convex part is provided with a lock installation part, and when the lock is installed in the lock installation part, the handle locking device is not easily separated from the handle part', and the ϋ-shaped groove is provided for the lock It can be seen from the appearance that the person who shows the mark shows the handle lock device as a single body made of a thermoplastic resin material. 11'If the circuit breaker handle lock device of any one of claims 1 to 4 of the applied patent garden, wherein the ϋ-shaped groove is arranged in the lock portion, 者 the person who can see the status display mark from the appearance, and Thermoplastic resin material is used to form the handle locking device as a whole "(Please read the precautions on the back before filling out this page) Printed on the paper standard of the China National Standard (CNS) A4 specification 210 X 297 mm) 14 311256 -n III H- ± -τ-δϋI I 1-- ni I ^ n I nn W