TW526509B - Circuit breaker - Google Patents

Abstract

Provided is a circuit breaker having good heat resistance, arc resistance and feature of over travel between contacts, and being adapted to recover or reuse, comprising a switching means (7, 28, 29, 31, 31) for opening and closing the retaining holder (6, 26) which are rotatably holding the movable contact (5, 25), and a base (2, 21) for rotatably holding the retaining holder (2, 26) and for holding the contact of fixed side (10, 23). The movable contact acts when over current is detected, and the arc generated between contacts is extinguished by the extinguishing apparatus (9, 34). The base (2, 21) is made of an insulative molded article which uses crystal thermal plastic resin as a main resin, and is subjected to an electronic beam irradiating.

Description

526509 A7 B7 V. Description of the Invention (i) [Technical Field of the Invention] The present invention relates to a circuit breaker. When an overcurrent is detected, the movable contact can be moved, and the arc generated by the arc suppression device will The arc is eliminated. [Known technology] Since the base of conventional circuit breakers is relatively easy to meet requirements such as heat resistance, arc resistance, and mechanical strength, thermosetting resins are mostly used as the main component. However, burrs generated during molding of the thermosetting resin and injection ports or runners generated during injection molding must be incinerated or buried, making it difficult to recycle or reuse the burrs, injection ports, and runners. On the other hand, when examining a molded product using a thermoplastic resin as the main component, for example, it includes the thermoplastic properties of nylon 6, nylon 66, nylon MXD6, and the like shown in Japanese Patent Application Laid-Open No. 08- 丨 7 丨 847. Shuyue said that the molded products of inorganic compounds and reinforcing materials produced by dehydration reaction at a high temperature above 2000 ° C have good flame retardancy and good insulation properties after the electrodes are opened and closed. They are suitable as molded products for circuit breakers. However, when it is used as the base of a circuit breaker with a large rated current, it is found that the characteristics of the base, especially the heat resistance, are obviously insufficient. According to experiments by the inventors, the base described in Japanese Patent Application Laid-Open No. 08-171847 (the melting point of the nylon 6 constituting the main resin is about 2 i 5 ° C) is used in an ampere frame of 225 amperes, rated A circuit breaker with a current of 225 A was subjected to an overload breaking test [an experiment in which the circuit was cut by passing 6 times the rated current (JIS C8370 and C8371). At this time, when passing 225Ax6 = 135〇A electricity, the overtravel value between the contacts will be reduced, and the contact pressure between the contacts will be abnormal. This paper applies the Chinese National Standard (CNS) A4 specification⑵G X 297. ) 313227 (Please read the Zhuyin on the back? Matters before filling out this page)

------- Order --------- Line I Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 526509 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the Invention (2) Location reduce. At this time, it was found that a melting phenomenon occurred near the surface of the base for fixing the contact point fixed on the base side. The reduction of these overtravel values, the reduction of the contact pressure between the contacts, and the melting phenomenon near the base are mainly caused by the arc heat generated by the disconnection. When the vicinity of the base used to fix the fixed contact point is melted, the contact pressure between the contacts will be unstable, and the contact portion that is in contact with the fixed contact point of the base will be deformed due to the continuous opening and closing action. , And then there is a concern that the overtravel value will decrease. The overtravel value here refers to the amount by which the movable contact moves to the fixed contact when the fixed contact is removed when the contact is in contact. In order to maintain a constant contact pressure, the overtravel value is set to a multiple of the thickness of the contact with a margin. Structures used to maintain contacts, such as bases, movable contacts, fixed contacts, etc. In order to maintain the contact pressure between the contacts, they bear the reaction force of the contacts and deform the structure under the reaction force, such as 匍Volatile deformation, and the overrun value will decrease year by year. In addition, thermoplastic resins, such as polybutylene terephthalate (PBT for short, has a melting point of about 22 (rc) or polyethylene terephthalate (PET for short, has a melting point of about 255.) :) is the same when it is the main component. Therefore, 'change the resin material to a higher melting point polyphenylene sulfide (referred to as PPS, melting point is about 290 ° C) and perform the same overcurrent trip test, it will also produce [Summary of the invention] The present invention was developed by the present invention in order to solve the above problems, and its purpose is to provide a circuit breaker which has good heat resistance and arc resistance, even if it is caused by overcurrent I tripping or repeated over-electrodeposition. High temperature heating process, melting or heat. The paper size is applicable to Chinese national standard (C ^) A4 size ⑵Q χ 297 public hair) ------ 2 313227 (Please read the note on the back? Matters before filling out this page) Order --------- line "ϋ n ϋ 526509 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (3) Distortion is also very rare. In addition, the activity can be activated when an overcurrent is detected. The contact rotates and will use the arc suppression device to connect with the movable contact The arc generated between the other contact point of the contact point and the other point is extinguished. In the circuit breaker, since the crystalline thermoplastic resin is used as the main resin, and it is an insulated molded product irradiated with electron beams after molding, it can be used. A circuit breaker with little arcing resistance and minimal arcing even when subjected to a high-temperature heating process is provided. The circuit breaker is equipped with an opening and closing mechanism that has movable contacts and keeps the movable contacts in a rotatable state. A base; provided with another contact and an arc extinguishing device 'and keeping the holder in a rotatable state and holding the other contact; and an outer cover to cover the base and form a frame, and Since the base is made of a molded product, the heat resistance and the overtravel characteristics between the contacts are excellent. In addition, the base has a bottom portion on which a holder, another contact point, and an arc suppression device are disposed; and the bottom portion The side wall that is arranged orthogonally and forms an interface with the outside. Since the bottom of the base is irradiated with electrons, and the side wall of the base is not irradiated with electrons, it is caused by arcing. The heat resistance of the arc heat and the impact resistance to the increase of the internal pressure of the frame are very good. Also, the base is provided with a configuration part along the rotating surface of the movable contact, and a retainer, another contact and a consumer are arranged on the base. For the arc device, because the placement unit is irradiated with electron beams, it has excellent heat resistance and arc resistance and can be finely processed, which is very helpful to reduce the external control and increase the density of parts. In addition, in 'molded products, Relative to 100 parts by weight of the resin component, since it contains 60 to 200 parts by weight of the reinforcing material, the occurrence of melting or thermal deformation is extremely high. ^ The paper size applies the Chinese National Standard (CNS) A4 specification (21〇x 297). ---- -3 313227 2f Read the precautions on the back before filling out this page) .0 tl --------- & 丨 β 526509 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Invention Description (4 ) Less, and good arc resistance and strength. [Embodiment of the invention] The first embodiment is the external view of the circuit breaker of the i-th embodiment of the present invention, the second diagram is the outer cover view of the first diagram, and the third diagram is the second diagram. Holding of the drawing: an external view, FIG. 4 is an enlarged cross-sectional view of a contact part, and FIG. 5 is a plan view of a base showing a change of FIG. 1. In the figure, 1 is an open circuit s, 2 is a base made of an insulating resin molded product, 3 is a base 2 made of an insulating resin molded product, and the spotted base 2 forms an outer cover of the frame, and 4 is an outer cover 3 The handle of the movable contact point 5 is opened and closed through the opening 7 and the companion holder 6; 6 is a retainer that moves the movable contact point 5 held in the movable contact point holding portion 6A (picture 3) ' 7 is the opening and closing mechanism that supports the metal bracket 7A on the base 2 and opens and closes the drive holder 6. 8 is the overcurrent detector that detects the overcurrent and trips the opening and closing mechanism. 9 is that An arc extinguishing device for eliminating arcs between points 5A and 10A, which supports a plurality of metal arc grid plates 9A by an insulated grid side plate 9β (Fig. 4). 10 is a base-side contact point (corresponding to a fixed contact) provided between the movable contact and the opposite side, and n is a base-contact 10 that can be rotated around the support pin 12 and formed. The supporting member of the circuit, u is a shortcut copper wire for electrically connecting the supporting member u and the fixed conductor 14, and 15 is an insulating member covering the fixed conductor i4. Next, the base 2 will be described in detail. The base 2 'is on its bottom 2C (Fig. 5 and Fig. 7) through the opening and closing _ ^ 1, the overcurrent detector 8, the arc suppression device 9, and the supporting member. 'Paper Size Family Standard (CNS—Specifications ⑽ 297 公 餐-# Order --------- line') (Please read the notes on the back before filling this page) 4 313227 526509 B7 V. Description of the invention (5) A base-side contact 10 ′ is arranged, and the terminal board holding portions 20 and 2 e are provided with the creep board 14A and 16 (FIGS. 4 and 2), and the holder 6 is supported by the holder supporting member F. The rotating shaft 6B (Figure 3). Among them, the arc extinguishing device 9 and the base-side contact 10 are similar to the arc generated by the contacts 5A and 10A, and the area having a large arc heating effect is assigned a number of 2g. (Fig. 5) In addition, the side wall 2A which is orthogonal to the bottom 2c of the base 2 and formed on the outside of the disc by the -body molding method, and the partition wall 2B between the insulating phases are also provided. The contact portion where the supporting member η of the base-side contact i 〇 of the contact 10 A contacts, the supporting member of the opening and closing mechanism, and the supporting member of the rotation shaft 6β of the holder 6 exert a great force. ^ Base 2 It is a molded product with crystalline thermoplastic resin as the main resin, which is irradiated with electron beams. The electron beams here are thin electron beams, which are slightly straight. It is widely used in the field of medical supplies for sterilization. The crystalline thermoplastic resin printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs is not limited as long as it is crystalline, but it is considered that the circuit breaker can be used in the market. Continuous use of 10 to M years, so it is best to use polyester, polyamide with a heat resistance of 120 or more under continuous use. To minimize the effect of moisture absorption, polyester is preferred, and poly-p-phenylene can also be used. Ethylene glycol diacetate (PET) or polybutylene terephthalate (pBT). These alloys can also be used. For good tracking performance or good insulation after disconnection, it is best to use For resins without stupid rings, such as polyamide, nylon 12 or nylon 6 or nylon 66 can also be used. Cross-linking accelerators are used to promote cross-linking, and they add 0.5 to 2 parts to the crystalline thermoplastic resin by electron beam irradiation. The uncrystallized part. Cross-linking promoting "is a polyfunctional monomer 'such as triaryl isocyanate (referred to as the Chinese paper standard (CNS) A4 specification (210 X 297 public love) for this paper size) " ----- 5 313227 526509 A7 B7 V. Description of the invention (6) TAIC), hydroxyethyl isocyanoacrylate (THEICA for short), ethyl ethyl isocyanomethacrylate (THEICM for short), methylbenzene Triacrylic acid vinegar (referred to as TMPTA), in addition, these two can also be added. If the gel fraction is high under the same amount of electron beam exposure, it is best to add taic or THEICA 〇 Antioxidants are mainly used to prevent the mixing of materials. The cross-linking accelerator is self-crosslinked, and it is added in an amount of 0.2 to 0.9 parts, preferably in an amount of 0.4 to 06 parts. The antioxidant is preferably a phenol-based antioxidant, such as: 2,6, one, two, three butyl, one, one cresol (BHT for short), triethylene glycol, one bis [3-, third butyl, one 5-Methenyl-4-hydroxyphenyl) propionate], M-Hexanediol-bis [3-mono (3,5-di-third-butyl-4-4-hydroxyphenyl) propionate], pentaerythritol · [3— (3,5-Di-Third-Butyl-4 ~ hydroxyphenyl) propionate], N, N'hexamethylenebis (3,5-Di-Third-Butyl ~ 4-hydroxy-monohydrogenamine), 3,5-bis-third-butyl-4-hydroxybenzyl phosphate-diethyl vinegar and the like. These may be added as a single body or as a combination. Reinforcing materials are represented by glass fiber. The fiber shape of glass fiber-based glass: 'Its glass materials include E glass, S glass, D glass, T glass, 2 quartz glass, and the like. Generally, a glass fiber having a diameter of 6 to… claws and an aspect ratio of 10 or more has a high impact strength. —Inorganic fillers include oxygen oil, carbonic acid, mica, clay, talc, kaolin, wollastonite, etc. I_ There are red phosphorus series, phosphate vinegar series, #Su Li, etc., but in 6 313227 526509 A7 ---------— B7 V. Description of the invention (7) (Please read the note on the back? Please fill in this page for more details.) On the condition that the contact 5A and 10A have less metal residue, phosphate ester and pixel are preferred. In addition, it is preferable to use a dentin system to exhibit flame retardancy in a smaller amount than a phosphate ester system. Furthermore, it is difficult to decompose even if it stays in the cylinder during molding, and dibromopolystyrene is preferred. For the flame-resistant auxiliary materials, it is better to increase the multiplication effect with the halogen system. Next, the electron beam irradiation to the base will be described. Fig. 6 is an explanatory view of the irradiated electron beams on the pedestal shown in Fig. 5, and Fig. 7 is a positional relationship diagram between the pedestal and the electron beam shielding device when the electron beams are irradiated in Fig. 6; Fig. 8 and Fig. 9 are diagrams of other examples of the electron beam irradiating device of Fig. 6. In the figure, a 40-series electron beam irradiating device, a 41-series electron beam, and a 50-series electron beam shield are provided with passage holes 51 to allow the electron beam 41 to pass through an iron plate having a thickness of 4 mm. As shown in FIG. 7, the line 51 of the base 2 passes through the hole 51 and is open at the bottom 2C. On the other hand, the side wall 2A of the base 2 and the terminal board holding portions 2D and 2E are shielded by the electronic wire shield 5G. . In Figure 6, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Although it is shown that the electronic wire shielding device 50 is separated from the base 2, the electronic wire shielding device 50 may be placed directly on the base 2. The electron beams 41 irradiated in parallel from the electron beam irradiation device 40 irradiate the base 2 as the object to be irradiated vertically, and pass through the bottom 2C. With the electron wire shield 50, the bottom 2C of the base 2 can be crosslinked. On the other hand, the side walls 2A and the terminal board holding portions 2D and 2E are not crosslinked because they are shielded by the electron wires. Generally speaking, crystalline thermoplastic resins contain uncrystallized parts in proportion to the degree of crystallinity. When the electron beam 41 is irradiated to the molded product (base 2), the paper size of the molded product applies the Chinese National Standard (CNS) A4 specification (21 °). x 297 mm)-^-___ 7 313227 526509 A7 B7 V. The uncrystallized part of the description of the invention (8) will be cross-linked and form three ^ mesh structures. Resin materials for this molded product include base resin, reinforcement material, material, flame retardant material, and flame retardant auxiliary material, etc. Bezhenchon (Please read the precautions on the back before filling this page} In addition to materials, cross-linking is also added Accelerators and resistances = composition-like resin that penetrates through the electron beams 41 to crosslink the non-crystallized parts, but the strength of the electron beams 41 does not penetrate into the shape of the resin. Therefore, it is best that the strength of the electron wire 41 can penetrate the molded product. The acceleration voltage of the electric electron beam irradiation is preferably 2MV or more under the condition of penetrating the bottom M of the base 2 and being thick and cross-linked, but ^ The plate does not allow electrons to irradiate the space charge in the material.

Better. 3 to 5 MV In addition, from the viewpoint of preventing electrons from remaining, it is preferable not to irradiate electron beams to the partition walls 2B other than the thin frame supporting member 2F. In other words, if the electronic wire shields 55, 56 (Figures 8 and 9 are shown, it is best to use a partition wall 2B that can shield all or part of the support member 邡 of the partition wall 2B. Consumption by employees of the Bureau of Intellectual Property, Ministry of Economic Affairs In the closed state shown in Figure 4 printed by the cooperative, when an overcurrent is generated, the overcurrent detection unit 8 detects the overcurrent and transmits a trip command to the opening and closing mechanism 7. This allows the 'opening and closing mechanism 7 to pass through the elbow. The stored force of the joint link mechanism rotates the cage 6 counterclockwise in Figs. 2 and 4, and moves the movable contact point $ together with the cage 6 in the same direction, separating the contacts 5a, 1. A also generates an arc between the i contacts 5A and 10A. This arc is eliminated by the electromagnetic attraction of the arc extinguishing device 9. When the overcurrent is relatively large, the opening and closing mechanism 7 transmits an electromagnetic repulsive force before the tripping action is performed. Separate the contacts 5 A and 10 A. Generate an electric arc This paper size applies the Chinese National Standards (CNs) A4 (210 X 297 mm) 8 313227 526509 A7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (9 o'clock overheated by arc The loud area is the area 2G where the arc extinguishing device 9 or the contacts 5A and 10A are provided (Fig. 5). In addition, the contact portion 2G of the supporting member of the base-side contact 10 with the contact 10A is provided. The supporting member of the bracket 7A of the opening and closing mechanism 7 and the supporting member of the rotating shaft 6B of the holder 6 exert a great force. As described above, since crystalline thermoplastic resin is used as the main resin, an irradiated electron beam is used after molding. Since the base 2 is an insulating molded product, it has the advantages of fine processability of the thermoplastic resin, recyclability of the injection port and the runner, and the base 2 with excellent heat resistance and arc resistance. Even when subjected to high temperature heat In the process, the occurrence of melting or thermal deformation is also very small, and it has good resistance to volts, so it can obtain the base 2 with less influence on the contact pressure between the contacts 5 A and 丨 OA. Even the cage supporting member of the partition wall 2B When 2ρ is irradiated with electron beams, it can also improve the heat resistance and the overtravel characteristics between the contacts. In addition, when the molded product contains 60 to 200 parts by weight of the resin component based on 100 parts by weight of the resin component, it can be used in the summer. Reduces melting or thermal deformation of base 2 And because of its high resistance to glucose and high strength, the reduction in contact pressure is particularly small. In this way, the structural material containing a large number of reinforcing materials is used to withstand local forces and exert high temperature effects such as arc heat there. It is very useful for the base 2. Also, since the bottom 2C of the base S 2 is cross-linked, the side wall 2a is shielded by the electron beam and is not cross-linked. Therefore, when the circuit breaker is overloaded and the circuit is broken, the base 2 that is easy to reach high temperature can be made. The lower 2C of the bottom has a reduced shape of fusion or thermal deformation, and has good resistance to volts. On the contrary, when the side wall reduces the impact due to cross-linking, the "performance" will be affected by the internal dust generated when the short circuit interrupts ... "This paper has passed the Zhongguanjia Standard (CNS) A4 specification (210 X 297 male f _ 9 313227 (please read the note on the back first? Please fill in this page again.) Order · --- Line · 526509 A7 V. Description of the invention (occurred in 10 cases' but because the side wall 2A is not crosslinked and has good impact resistance, a base with both heat resistance and impact resistance can be obtained Block 2. Example 1 (please read the note on the back? Matters before filling out this page) The following describes the embodiment of the present invention in detail, but the present invention is not limited to this embodiment. The first embodiment is explained 225 Circuit breaker for amp range. Fig. 10 is a diagram of a mold for forming a base for a 225 amp range according to the first embodiment of the present invention. In Fig. 10, 90 is composed of a fixed mold 90A and a movable mold 90B. A mold is formed along the shape of the base 2. 91 is a mixed material injection port formed in the fixed mold 90A. The mold is ejected using a 25 ° mold at a movable mold temperature of 85 to 95 ° C and a fixed mold temperature of 85 to 95. C. Under the conditions of a cylinder temperature of 23 to 28 ° c, a total of 10 seconds of the dwell time and the injection time, the mixed material is injected from an injection port 91 located in the center of the fixed mold 90A to form the base 2 .-- Next, using the method shown in Figure 6, , 2D, 2E (Fig. 5) are iron electron wire shields with a thickness of 4 mm, and are covered with 50. Nisshin high voltage electron beam irradiation device 40 is used to irradiate the molded product with electron beams at an acceleration voltage of 2 mv. Economy Printed by the Consumer Cooperatives of the Ministry of Intellectual Property Bureau, explaining the experimental methods, determination methods and results. Molded in the above method, using the irradiated electron bases (11) to (=, assembling circuit breakers (225 amp range), And carry out an overload and disconnection test (the amount of current is 6 times the rated current (225Aχ 6 = 1350 A).) After the inspection, if the contact part of the contact point is fixed and its vicinity (the contact point on the base side in Figure 5) Supporting member u of 10 and area 2G which is the bottom 2c of base 2-part of the surface layer is not melted, it means that it is qualified. 1 This paper size is applicable to China National Standard (CNS) A4 specification ⑵ "297 issued" 10 313227

The third butyl one-to-one phenol (Jane 526509 V. Description of the invention (u / melt is unqualified. Table luxury "is the result of subtraction test. The resin in the table is made of flame retardant materials and flame retardant The composition of the auxiliary materials. Samples ⑴) to (15) and the control group (21) to (24) were added with 15 parts of dibromopolystyrene, and 5 parts with trioxide were added to the flame-resistant auxiliary materials. Antimony. Samples (11) to (15) and the control group (22) to (24) were added with triaryl isocyanate (referred to as TAIC) as the parental accelerator, and 2,6 as BHT as the antioxidant. Samples (14 ), (15) and the control group (23), (24), the shock absorbing material system contains 8 parts of ethylene / propylene copolymer. In addition, samples (11) to (15) and the control group (21), (23) The electric hand line was irradiated, while the control groups (23) and (24) were not irradiated with electronic rays. (Table 1) (Please read the precautions on the back before filling in this page) Print out the sample control group No (Π) Γ (12) (12) (21) (22) Group resin nylon 6 (55 parts) nylon 6 (55 parts) nylon 6 (55 parts) nylon 6 (55 parts) Nylon 6 (55 parts) Reinforcing material Glass fiber (33 parts) Glass fiber (45 parts) Glass fiber (ποο part) Glass fiber (45 parts) Glass fiber (45 parts) Inorganic Non-free Non-alloy Non-free Non-cross-linking accelerator TAIC ( 0.5 parts) TAIC Π parts) TAIC (2 parts) No TAIC (1 part) — Antioxidant BHT (0.5 part) BHT (0.7 part) BHT (U7 part) No BHT (0.7 part) — presence or absence of electronic photo A judge qualified qualified qualified unqualified unqualified moderate

Rule 1 4S) A Centimeter 1:97 11 313227 526509

V. Description of the invention (12 (Table 2) Differentiation -------The control group 1ΝΟ (14) _ (15) (23) (24) Resin nylon 6 ~ nylon 6 nylon 6 nylon 6 (55 parts) ( 55 parts) (55 parts) (55 parts) and seismic materials ethylene / propylene co-ethylene / propylene co-ethylene / propylene co-baking / propylene co-polymers (8 parts) mash (8 parts) polymers (8 parts) ） Polymer (8 parts) Reinforcing material_1 No No No No Inorganic f Talc Talc talc formation-~ ----- (45 parts) (45 parts) (45 parts) (45 parts) Cross-linking accelerator TAIC ~ ~ TAIC without TAIC (0.5 parts) (1 part) Π parts, antioxidant BHT BHT without-V 1 w} _ BHT — ^ ~ —---- (0.5 parts) (0.7 parts) (〇 · 7 parts) Electricity Ding Lian irradiation has a useful judgement of pass ~~ Pass or fail does not fit-(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 as shown above, the use of cross-linking The circuit breakers (11) to (15) of the base 2 formed of the nylon 6 composite material of the accelerator and the antioxidant, even after the overload and disconnection test, The contact portion of the fixed contact and its vicinity are not melted, and have better heat resistance and arc resistance than the circuit breaker using the base 2 which is not irradiated with electrons. Therefore, it can be easily estimated that it will be used for a long time. The overtravel characteristics between the contacts are also very good. In addition, the circuit breakers of samples (14) and (15) have good impact resistance, especially when the base 2 formed by the mold shown in FIG. 10 is used. Cross-linking of the bottom 2C via electron beam irradiation can increase mechanical strength (but impact resistance decreases). Since the side wall 2A is not irradiated with electron beams and has good impact resistance, it is sufficient to increase the internal pressure even with the occurrence of an arc In addition, the control groups (22) and (24) which were not irradiated with electron beams had poor heat resistance. Second Embodiment Performance The second embodiment of the present invention will be described below. FIG. 11 is the second embodiment of the present invention. The external view of the circuit breaker of Figure 12. Figure 12 is a partial explanatory diagram of the circuit breaker of Figure u. In the figure, the 20 series insulation frame is made in accordance with the first embodiment and the i-th paper standard in accordance with Chinese national standards ( CNS) A4 size (210 x 297 mm) 12 313227. --- line 526509 A7

13 313227 526509 B7 V. Description of the invention (M) :, T rod is folded into a U-shaped operation ring, one end of which is fastened with handle 29, and the other end is fastened with the lever snap groove of flash lock 32. In addition, the handle 29 (please read the note on the back? Matters before filling out this page) is composed of a grip part state outside the edge frame 2 () and a protruding part 29c connecting the operation ring M. ^ The latch supported by the shaft 27 is formed with a latching groove 32a fastened to the other end of the operating ring 3 i, a pressing rod 37 that bears the electromagnetic tripping portion 34, and a bearing bent by a bimetal 33 Trigger piece 32c for the force of disengagement of the "operating lever" between the engaging lever 32a of the operating lever. The return spring 32d is contracted between the arm P 26 and the latch 32, and the latch is often locked. Spring in the counterclockwise direction. The other end of the ring 31 embedded in the U-shaped groove 26a is clamped by the latching groove 32a of the flash lock 32 by a spring-like spring pressure to form a locked state. The mouth contact 24 elastically connects the movable contact 25a and forms an open circuit (a first state). In this way, the arm 26, the main spring 28, the handle 29, the reset spring 30, the operation ring 31, and the flash The lock 32 constitutes a darkening mechanism. The 33 series printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs corresponds to the electric current and is heated and bent in the right direction in Figure 12. Bimetal; 34 series electromagnetic tripping unit, which has a plunger 36 driven by the electromagnetic force generated by energizing the electromagnet ^, and a rod that protrudes to the left in FIG. 12 through the suction action of the plunger. 37. An overcurrent trip device is formed by the bimetal 33 and the electromagnetic trip unit 34. The 38 series arc suppression device is an arc suppression plate of the arc suppression device 38. The 40 series includes the fixed contact point M and the contact point 25 The arc generating chamber 'is full of arcs generated when the movable contact point 25 is tripped. 41 is an arc current that guides the arc in the direction of the arc extinguishing device 38. The paper size applies the Chinese National Standard (CNS) A4 specification (21〇X). 297 public love) 14 313227 15 526509 B7 V. Description of the invention (Road. In the circuit breaker constructed as above, when a short circuit current flows through the circuit, the electromagnet 35 of the electromagnetic trip 34 will sense the current and act to attract it. The plunger 1 and Λ are linked to the lever 37 of the plunger 36 and move to the left. In this way, the trigger piece θ is pressed to * 37, and the interlock 32 is turned clockwise against the spring pressure of the return spring 32d. The U-shaped groove 26a 32a

The other end of Sun Zuo% 31, which is in a locked state, is turned freely with respect to the arm portion 26 by turning in the clockwise direction by the latch. Due to the spring pressure of the main spring 28 of the open mechanism by the boil pan 26, the shaft 27 / is taken as the center. Turn clockwise and forcibly disengage (trip). Thereby, the movable contact point 25 is quickly tripped and a disconnection action is performed. Here, for the part that generates stress on the base 21 from the parts arranged on the base 2, such as the protrusion 仏 provided on the base 21 through the body forming method, the handle bearing ^ 2 1 b, the arm bearing portion 2! C and the electromagnetic tripping fixing part 2 ^ d will be described. Printed by the Consumer Affairs Bureau of the Intellectual Property Agency of the Ministry of Economic Affairs. The dog 21a is protruded in a manner to support the 28-end of the main spring, and uses the main spring 28 to generate a force. The handle bearing portion 21b is provided in the form of a rotating shaft of a shaft-supporting handle 29 ', and generates a force using the shaft. The arm bearing 硭 21 c is provided in the form of a shaft supporting arm portion 26 and a movable contact point, which is a rotating shaft, and uses the rotating shaft 27 to generate a force. The electromagnetic tripping fixing portion is a rib-shaped body provided with the electromagnetic tripping portion 34 positioned on the base 21, and a movable contact point generates a force through the fixed contact point 23 and the electromagnetic tripping portion 34. As mentioned above, 'Because the side part (configuration part) 21 A of the base 21 is based on this paper, the Chinese National Standard (CNS) A4 specification (210 X 297 mm) is applied 15 313227 526509 A7 B7 Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employee Consumer Cooperative Co., Ltd. 5. Description of the invention (16; radiographic wire 'has the fine processability of thermoplastic resin, has recycling advantages such as injection ports, runners, etc., and can improve heat resistance and arc resistance. In addition, Since the outer shell 22 is also irradiated with electron beams, the heat resistance and arc resistance can also be improved. As shown in the second embodiment, the arm contact 26, the fixed contact 23 or the consumer contact are arranged along the rotating surface of the movable contact point. The circuit breaker of the arc device 38 has a smaller breaking capacity than the first Bech Kai y L equipped with a holder at the bottom of the base, other contacts, and an arc extinguishing device circuit breaker, and the arc energy generated when the circuit is broken. There is also less radon, and the insulating molded products such as the base 21 or the outer cover 22 are arranged at close positions by the arc tendency. Since the side surface portion 21A of the base 21 and the outer cover 22 are irradiated with electron beams, Mechanical strength and heat resistance And the arc resistance is improved, so the arc energy is reduced. Even if the internal pressure rises due to the arc pressure, it can meet the heat resistance required for arc heating. Since the heat resistance and arc resistance are improved, it is not necessary to fix it. The arc-extinguishing side wall of the arc-extinguishing plate 39 can be directly inserted into the groove of the base 21 and the outer cover 22 to form an arc-extinguishing device 38, and the number of parts is reduced, so that the size of the circuit breaker of the arc-extinguishing plate 39 in the i-degree direction (through the 12th The direction of the paper surface in the figure) is increased to improve the arc extinguishing performance. By irradiating the projections 21a, the handle bearing portion 2 lb, the arm bearing portion 21c, and the electromagnetic tripping fixing portion 21d with electron beams, the mechanical strength is improved. Compared with thermosetting resins, the disadvantages of thermoplastic resins, which are soft and have poor positioning greenness, especially the shortcomings of nylon, can be compensated. In addition, although the base 21 has been described in the second embodiment as a box shape, the outer cover This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 mm) 16 313227 (Please read the notes on the back before filling this page) # Order --------- Line 526509 A7 B7 Economy Intellectual property Employee Consumption Cooperatives' Seal V. Invention Description (17) 22 is a flat plate, but its shape is not limited to this, and the shape of both can also be box-shaped. Although the single-pole circuit breaker has been described in the implementation However, it can also be a two-pole circuit breaker with two poles in the thickness direction of the circuit breaker between the base 21 and the outer cover 22. At this time, an insulated center base is provided between the two poles, and the center base is also The movable contact point 25, the handle 29, the electromagnetic tripping portion 34, and the like can be provided. The center base is preferably made of a molded product irradiated with electron beams having the same composition as the second embodiment. [Industrial Applicability] This month, it was used for heat resistance, arc resistance, and overtravel characteristics between contacts, and it is made of thermoplastic resin as the main component, and can be recycled or reused with burrs and injection ports. Circuit breakers, runners, etc. [Brief description of the drawing] ^ is the external view of the circuit breaker of the embodiment 1 of the present invention. FIG. 2 is a cover-removed view of the external view of FIG. 1. FIG. 3 is an external view of the cage of FIG. 2. Fig. 4 is an enlarged sectional view of a contact portion of Fig. 1; Fig. 5 is a plan view showing the base of Fig. 1 as a pattern. FIG. 6 is an explanatory diagram of irradiating an electron beam to the base shown in FIG. 5. FIG. Fig. 7 is a positional relationship diagram between the base and the electron-ray shielding device when the electron beam is irradiated in Fig. 6. Fig. 8 is a diagram showing another example of the electron beam irradiator of Fig. 6; FIG. 9 is a diagram of another example of the electron beam irradiating device of FIG. 6. -The first embodiment of the invention of the 225 ampere range is used for this paper. The paper size is 17 17 313227 (Please read the precautions on the back before filling this page) 0

II ϋ ϋ ϋ ϋ n ^ -OJI 1 n ϋ l_i ϋ ϋ II V. Description of the invention (u molding die diagram. Figure 11 shows the second implementation of the invention ^ r Figure 12 shows the circuit breaker of u ' Appearance [Description of Symbols] Partial cut-out explanatory diagram of the circuit breaker.

2A 2C 2F 5, 25

6, 26 6B 7A 9B 11 13 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 2, 21 Base 2B, 21B Wall 2D, 2E Terminal board holder 2G Contact 4 &29; Handle 5A, 10A contact 6A activity Contact holding parts 7, 28, 29, 31, 32 Opening and closing 8 Overcurrent detector 9A Arc suppression grid 10 Fixed contact 12 Support pin 14A, 16 Terminal board 15 Insulation member 21a Protrusion 21b Handle bearing part 21d Electromagnetic Breakout fixed part 23 Fixed contact point 26b Stopper stop part ZOd U Hard This paper standard applies to China National Standard (CNS) A4 (210 14 20 21A 21c 22 24 26a 313227 18 A7 526509 _B7 V. Description of the invention ( 19) Employees ’Cooperative Cooperative Printing Coat 26c Long Holes 26 Arms 27 Shafts 28 Main Springs 29b Grips 29c Protrusions 31 Operating Rings 32 Latches 32a Lever Engagement Slots 32b, 32c Trigger Pads 32d Recovery Springs 33 Bimetal 34 Electromagnetic trip unit 35 Electromagnet 36 Plunger 37 Rod 38 Arc suppression device 39 Arc suppression plate 40 Electron irradiation device 41 Electron 50 Electron shielding 51 Passing hole 55 > 56 Electron Cover 90A Fixed mold 90B Movable mold 90 Mold 91 Note entrance (please read the precautions on the back before filling this page)-.. -I line · This paper size applies to China National Standard (CNS) A4 (210 X 297) %) 19 313227

Claims (1)

526509 cs J --------------------D8 II --------------------- VI. Application Patent Scope 1 · One kind of open circuit is that the movable contact can be rotated when an overcurrent is detected, and the arc generated between the other contact located opposite to the movable contact is eliminated by an arc suppression device. The arc is characterized in that the circuit breaker is an insulating molded product using a crystalline thermoplastic resin as the main resin and irradiated with an electron beam after molding. 2. The circuit breaker of item i in the scope of patent application, which includes: an opening and closing mechanism for opening and closing the holder that keeps the movable contact in a rotatable state; another contact and an arc suppression device to maintain The holder is in a rotatable state and holds the base of the other contact; and an outer cover for covering the base and constituting a frame, and the molded product is the base. 3. The circuit breaker according to item 2 of the scope of patent application, wherein the base is provided with a bottom for holding a holder, another contact and an arc extinguishing device, and a side wall provided orthogonally to the bottom and forming an interface with the outside The bottom of the base is irradiated with electron rays, and the side wall of the base is not irradiated with electron rays. '4. The circuit breaker according to item 2 of the scope of patent application, wherein the base is provided with a holder, another contact and an arc extinguishing device on a configuration portion provided along the rotating surface of the movable contact, and the configuration portion Department of irradiated electrons. 5. The circuit breaker according to item 1 of the patent application scope, wherein the molded product contains 60 to 200 parts by weight of a reinforcing material with respect to 100 parts by weight of the resin component. This paper is suitable for financial standards (CNS) A4 (210 x 297 public love) '" " ----- 313227 ----- (Please read the precautions on the back before filling this page)- I. · Mouth, * 丨 丨 丨 丨 丨 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 20