External operation handle assembly for molded case circuit breaker

Abstract

Disclosed is an external operation handle assembly for a molded case circuit breaker. The external operation handle assembly for a molded case circuit breaker prevents a panel door from opening when current is flowing through the molded case circuit breaker, thereby preventing accidents in advance. The external operation handle assembly for a molded case circuit breaker, according to embodiments of the present invention, comprises an external operation handle and a latching part. The external operation handle is coupled to the molded case circuit breaker. The latching part is coupled to the panel door and comes into contact with a locking part of the external operation handle. In a normal state in which current flows through the molded case circuit breaker, the locking part moves in one direction to come into contact with the latching part.

Description

External operating handle assembly of circuit breaker for wiring

[0001] The present invention relates to an external operating handle assembly coupled to a wiring circuit breaker.

[0002] A molded case circuit breaker (MCCB) is a type of circuit breaker that is an electrical device that cuts off the flow of electricity to prevent electrical accidents when abnormal currents such as leakage or overcurrent occur.

[0003] A typical circuit breaker contains fixed and movable contacts internally. During normal current flow (not fault current), the fixed and movable contacts contact each other, allowing current to flow. However, when an abnormal current occurs, the fixed and movable contacts separate, interrupting current flow.

[0004] Circuit breakers for wiring are mainly installed in distribution panels or external boxes, and users can check and operate the status (On, Off, Trip) of the circuit breaker even with the panel door closed using the external operating handle.

[0005] When electricity is flowing to the circuit breaker, the locking part of the external operating handle protrudes outside the case and interferes with the panel door (specifically, the door plate placed on the inside of the panel door), preventing the panel door from opening.

[0006] And, when the circuit breaker is not energized, the locking part retracts into the interior of the case and does not interfere with the panel door, allowing the door to open.

[0007] By using an external operating handle, the panel door cannot be opened while the circuit breaker is energized, thereby preventing accidents that may occur to the user.

[0008] The locking devices of conventional panel doors (e.g., Korean Registration No. 10-2023361) have a complex structure, are not easy to manufacture, and are sometimes made of plastic, which makes them prone to breakage.

[0009] Therefore, there is a need for a locking device for panel doors that is not complex in structure, easy to manufacture, and not easily broken.

[0010] The purpose of the present invention is to provide an external operating handle assembly for a wiring circuit breaker, which is not easily damaged, has a simple structure, is easy to manufacture, and prevents the panel door from opening when current flows through the wiring circuit breaker.

[0011] The above-described object of the present invention is achieved by the following.

[0012] An external operating handle assembly for a circuit breaker according to embodiments of the present invention includes an external operating handle and a catch. The external operating handle is coupled to the circuit breaker. The catch is coupled to the panel door and contacts a locking portion of the external operating handle. In a normal state where current is flowing through the circuit breaker, the locking portion moves in one direction and contacts the catching portion.

[0013] Specifically, the engaging portion includes a first plate portion and a second plate portion. The first plate portion is coupled to the panel door. The second plate portion is arranged to be inclined at a preset angle with respect to the first plate portion. The locking portion of the external operating handle contacts the second plate portion.

[0014] Specifically, a first engaging protrusion is formed on the second plate. When the panel door is opened while the locking portion moves in one direction, the first engaging protrusion comes into contact with one end of the locking portion.

[0015] Specifically, the first hanging protrusion is formed by protruding in a direction parallel to the direction of one side or the other side of the second plate.

[0016] Specifically, the first hanging protrusion is formed with a preset length from the edge of the second plate portion toward the boundary area, which is the portion connected to the first plate portion.

[0017] Specifically, the protruding height of the first hanging protrusion gradually increases from the edge of the second plate toward the boundary area.

[0018] Specifically, the first fastening member is inserted into a hole formed in the panel door and a through hole formed in the first plate portion, thereby connecting the panel door and the first plate portion.

[0019] An external operating handle assembly of a circuit breaker according to embodiments of the present invention further includes a reinforcing member that is coupled to a second plate portion. One surface of the reinforcing member that contacts the second plate portion and one surface of the second plate portion that contacts the reinforcing member are formed to have the same shape.

[0020] Specifically, a second engaging protrusion is formed on the reinforcing member. When the panel door is opened while the locking member moves in one direction, the second engaging protrusion comes into contact with one end of the locking member.

[0021] Specifically, the second hanging protrusion is formed by protruding in a direction parallel to the direction of one side or the other side of the reinforcing part.

[0022] Specifically, the second hanging protrusion is formed with a preset length from one edge of the longitudinal direction of the reinforcing member toward the other edge.

[0023] Specifically, the height of the second hanging protrusion gradually increases as it protrudes from one edge of the reinforcing portion toward the other edge.

[0024] Specifically, the second fastening member is inserted into the through hole formed in the second plate portion and the through hole formed in the reinforcing portion, thereby connecting the second plate portion and the reinforcing portion.

[0025] Specifically, a catch insertion groove is formed in the second plate. The catch insertion groove is a hole that penetrates one surface and the other surface of the second plate, and is formed so that one side is open. When the locking part moves in one direction and one end of the locking part is inserted into the catch insertion groove, the panel door is restricted from opening. In other words, when the panel door is opened while the locking part moves in one direction and one end of the locking part is inserted into the catch insertion groove, the inner surface of the catch insertion groove comes into contact with one end of the locking part.

[0026] Specifically, a catch insertion hole is formed in the second plate. The catch insertion hole is a hole that penetrates one surface and the other surface of the second plate. When the locking part moves in one direction and one end of the locking part is inserted into the catch insertion hole, the panel door is restricted from opening. In other words, when the panel door is opened while the locking part moves in one direction and one end of the locking part is inserted into the catch insertion hole, the inner surface of the catch insertion hole comes into contact with one end of the locking part.

[0027] An external operating handle assembly of a circuit breaker according to examples of an embodiment of the present invention has the effect of preventing accidents in advance by preventing the panel door from opening when current flows through the circuit breaker.

[0028] In addition, the external operating handle assembly of the circuit breaker according to the examples of the embodiment of the present invention has the effects of not being easily damaged, having a simple structure, and being easy to manufacture.

[0029] More detailed effects of the external operating handle assembly of the circuit breaker for wiring according to examples of the embodiment of the present invention are described in the specific contents for carrying out the invention below.

[0030] FIG. 1 is a perspective view from above of an external operating handle assembly of a circuit breaker according to examples of an embodiment of the present invention.

[0031] FIG. 2 is a perspective view of the external operating handle assembly of the wiring circuit breaker illustrated in FIG. 1, viewed from below.

[0032] Figure 3 is a perspective view of the back of the panel door illustrated in Figure 1 viewed from one side.

[0033] Figure 4 is a perspective view of the back of the panel door illustrated in Figure 1 as viewed from the other side.

[0034] Fig. 5 illustrates the first catch and the first reinforcement shown in Fig. 4.

[0035] Fig. 6 is an exploded perspective view showing the first catch and the first reinforcement part illustrated in Fig. 5.

[0036] Figure 7 illustrates the first catch shown in Figure 6.

[0037] Figure 8 illustrates the first reinforcement part illustrated in Figure 6.

[0038] Figure 9 is a perspective view of the inside of the external operating handle viewed from one side.

[0039] Fig. 10 is a perspective view of the inside of the external operating handle illustrated in Fig. 9 viewed from another side.

[0040] Figures 11 and 12 are cross-sectional views showing the inside of the external operating handle.

[0041] Figure 13 shows the second catch.

[0042] Figure 14 shows the third catch.

[0043] Hereinafter, examples of embodiments of the present invention will be described in more detail with reference to the attached drawings. For components of the present invention that are clearly understandable and easily reproducible by those skilled in the art using conventional techniques, a detailed description thereof will be omitted so as not to obscure the gist of the present invention.

[0044] The attached drawings are only provided to facilitate understanding of examples of embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings.

[0045] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0046] Additionally, terms including ordinal numbers, such as "first," "second," etc., used herein may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component."

[0047] Hereinafter, an external operating handle assembly of a molded case circuit breaker according to examples of an embodiment of the present invention will be described.

[0048] The external operating handle assembly of the circuit breaker according to the examples of the embodiment of the present invention may be briefly referred to as the 'external operating handle assembly of the present invention' hereinafter.

[0049] Referring to FIGS. 1 and 2, the external operating handle assembly of the present invention is positioned on the upper side of the wiring circuit breaker (1) and is coupled with the wiring circuit breaker (1). The coupling method of the external operating handle assembly of the present invention and the wiring circuit breaker (1) is a known method.

[0050] A molded case circuit breaker (MCCB) (1) is a type of circuit breaker, an electrical device that cuts off the flow of electricity to prevent electrical accidents when an abnormal current such as a leakage current or overcurrent occurs.

[0051] A typical wiring circuit breaker (1) includes fixed and movable contacts internally. When normal current (not abnormal current) flows, the fixed and movable contacts contact each other and conduct current. However, when abnormal current occurs, the fixed and movable contacts separate, interrupting current flow.

[0052] When the fixed contact and the movable contact are separated, an arc is generated by the abnormal current flowing through the fixed contact and the movable contact. The generated arc is discharged to the outside of the circuit breaker (1) after going through an extinguishing process.

[0053] A plurality of base assemblies (1a) are accommodated in the case (drawing symbol not assigned) of the wiring circuit breaker (1).

[0054] A plurality of base assemblies (1a) are connected to each other. Each of the plurality of base assemblies (1a) includes several components that allow the plurality of base assemblies (1a) to be connected to each other.

[0055] A plurality of base assemblies (1a) are connected to each other and are energized or de-energized simultaneously. The energization indicates that current is flowing.

[0056] One of the plurality of base assemblies (1a) is equipped with a handle (1b) (see FIGS. 9 and 10) and various components for mounting the handle (1b).

[0057] When an abnormal current occurs inside a base assembly (1a) while the circuit breaker (1) is energized, the plurality of base assemblies (1a) are energized or energized simultaneously by operating the handle (1b) of the circuit breaker (1).

[0058] The components and operating principles that allow multiple base assemblies (1a) to be connected to each other to be energized or energized simultaneously are in accordance with known technology.

[0059] The wiring circuit breaker (1) applied to the present invention (specifically, the base assembly (1a)) includes a fixed contact (not shown), a movable contact (not shown), a switching mechanism (not shown), an arc extinguishing part (not shown), and a trip part (not shown), etc. Since the wiring circuit breaker (1) applied to the present invention represents a known wiring circuit breaker (1), a detailed description thereof is omitted.

[0060] The external operating handle assembly of the present invention includes an external operating handle (10).

[0061] The external operating handle (10) is placed on the upper side of the wiring circuit breaker (1) and is connected to the handle (1b) of the wiring circuit breaker (1).

[0062] Figures 9 and 10 show the inside of the external operating handle (10) with the case (11) of the external operating handle (10) omitted.

[0063] Referring to FIGS. 1, 2, 9 to 12, the external operating handle (10) includes a case (11), a body (12), a locking portion (13), and a handle portion (15).

[0064] The case (11) of the external operating handle (10) forms the exterior of the external operating handle (10).

[0065] The internal space of the case (11) accommodates a body part (12), a lock part (13), and a handle part (15).

[0066] The body part (12) can move inside the case (11).

[0067] The shape of the body (12) is not limited to a specific shape.

[0068] The body part (12) is connected to the handle (1b) of the wiring circuit breaker (1).

[0069] The body (12) includes components (e.g., recesses, etc.) that allow it to be connected to the handle (1b) of the wiring circuit breaker (1).

[0070] When the handle (1b) of the circuit breaker (1) for wiring changes its position from the OFF position to the ON position, the body (12) moves (forwards) in one direction.

[0071] When the handle (1b) of the circuit breaker (1) for wiring is changed from the OFF position to the ON position, and the handle (1b) of the circuit breaker (1) is in the ON position, the body part (12) maintains a state of moving (forward) in one direction.

[0072] And, when the handle (1b) of the circuit breaker (1) for wiring changes its position from the ON position to the OFF position, the body (12) moves (backwards) in the opposite direction.

[0073] When the handle (1b) of the circuit breaker (1) for wiring is changed from the ON position to the OFF position, and the handle (1b) of the circuit breaker (1) is in the OFF position, the body part (12) maintains a state of moving (rearward) in the opposite direction of one direction.

[0074] The handle (1b) of the wiring circuit breaker (1) being in the ON position indicates that the wiring circuit breaker (1) is in a normal state. When the wiring circuit breaker (1) is in a normal state, the fixed contact and the movable contact of the wiring circuit breaker (1) make contact, and current flows through the wiring circuit breaker (1).

[0075] In addition, the fact that the handle (1b) of the wiring circuit breaker (1) is in the OFF position indicates that the wiring circuit breaker (1) is in a blocked state. When the wiring circuit breaker (1) is in a blocked state, the fixed contact and the movable contact of the wiring circuit breaker (1) are separated, so that no current flows through the wiring circuit breaker (1).

[0076] When the circuit breaker (1) is in a tripped state, this indicates, for example, when an abnormal current occurs in the circuit breaker (1). When an abnormal current occurs in the circuit breaker (1), a trip operation is performed by the operation of the trip unit and the switching mechanism. That is, the movable contactor rotates and separates (is separated) from the fixed contactor, and the current in the circuit breaker (1) is cut off.

[0077] The external operating handle (10) includes other components that enable movement of the body part (12).

[0078] The lock (13) can move inside the case (11).

[0079] When the body part (12) moves (forwards) in one direction, the locking part (13) connected to the body part (12) moves (forwards) in one direction together with the body part (12). At this time, one end of the locking part (13) penetrates a through hole (11h) (see FIGS. 11 and 12) formed in the case (11) and protrudes to the outside of the case (11).

[0080] One end of the locking portion (13) protruding outside of the case (11) comes into contact with the catch (30) described later when the panel door (20) is opened. Accordingly, the panel door (20) does not open. If the panel door (20) is opened while current is flowing to the circuit breaker (1), the user may be exposed to an accident.

[0081] The external operation handle assembly of the present invention prevents accidents that may occur by preventing the panel door (20) from opening when the wiring circuit breaker (1) is in the ON state.

[0082] Meanwhile, when the body part (12) moves (reverses) in the opposite direction of one direction, the locking part (13) connected to the body part (12) moves (reverses) in the opposite direction of one direction together with the body part (12). At this time, one end of the locking part (13) is introduced into the interior of the case (11) through the through hole (11h) formed in the case (11).

[0083] One end of the locking member (13) inserted into the interior of the case (11) is separated (detached) from the catch (30) fastened to the panel door (20). Accordingly, the panel door (20) is opened.

[0084] The external operating handle assembly of the present invention allows the panel door (20) to open when no current is flowing to the wiring circuit breaker (1). At this time, the user can inspect the wiring circuit breaker (1).

[0085] The locking portion (13) can be formed in various shapes. As long as one end of the locking portion (13) can move through the through hole (11h) of the case (11) and come into contact with the engaging portion (30), the shape of the locking portion (13) is not limited to a specific shape.

[0086] The locking part (13) is connected to one side of the body part (12).

[0087] The locking portion (13) and / or the body portion (12) include other components that connect one side of the locking portion (13) and the body portion (12).

[0088] The handle part (15) is placed on the body part (12).

[0089] The upper portion of the handle portion (15) is formed in a shape that is easy for the user to hold, and the lower portion is formed (arranged) with a gear portion (14). The upper and lower portions of the handle portion (15) may be formed as one piece, but are not limited thereto, and may be manufactured separately and then joined together. The joining is performed in a known manner.

[0090] The gear part (14) represents a gear formed in a circular shape or a part of a circular shape.

[0091] Teeth (gear teeth) are formed on the edge of the gear section (14).

[0092] The teeth of the gear portion (14) mesh with the teeth (12a) (see Fig. 10) of the gear formed on one surface of the body portion (12). Accordingly, when the body portion (12) moves, the gear portion (14) (handle portion (15)) rotates.

[0093] When the body part (12) moves (forward) in one direction, the gear part (14) (handle part (15)) rotates in one rotational direction (e.g., clockwise). At this time, the handle part (15) is in the ON position. The handle part (15) being in the ON position indicates that the handle (1b) of the circuit breaker (1) for wiring is in the ON position.

[0094] And, when the body part (12) moves (reverses) in the opposite direction of one direction, the gear part (14) (handle part (15)) rotates in the opposite direction of one rotation direction (for example, counterclockwise). At this time, the handle part (15) is in the OFF position. The fact that the handle part (15) is in the OFF position indicates that the handle (1b) of the circuit breaker (1) for wiring is in the OFF position.

[0095] The external operating handle assembly of the present invention includes a catch (30).

[0096] The catch (30) is fastened to the panel door (20).

[0097] The panel door (20) is installed in a distribution panel or an external box, and represents a door that can open and close the distribution panel or external box.

[0098] The user can open the panel door (20) and inspect the external operating handle (10) and the wiring circuit breaker (1) placed inside the distribution panel or external enclosure.

[0099] When current flows through the circuit breaker (1) (when the circuit breaker (1) is in a normal state), the panel door (20) is closed, and when current is cut off through the circuit breaker (1) (when the circuit breaker (1) is cut off), the panel door (20) can be opened.

[0100] The panel door (20) includes a door plate.

[0101] The door plate is a component of the panel door (20) and is formed into a plate shape of a preset size.

[0102] The panel door (20) (and door plate) are well-known components, so a detailed description thereof will be omitted. However, the door plate in the present invention is formed of a metal material and is not easily damaged.

[0103] The panel door (20) (specifically, the door plate) has an opening (20h) penetrating the panel door (20).

[0104] The handle portion (15) of the external operation handle (10) is exposed to the outside through the opening (20h) formed in the panel door (20). The user can operate the handle portion (15) of the external operation handle (10) through the opening (20h) without opening the panel door (20).

[0105] A catch (30) described later is attached to one side of the edge (frame) of the panel door (20) surrounding the opening (20h) formed in the panel door (20).

[0106] A catch (30) is illustrated in FIGS. 1 to 7, FIG. 9, and FIGS. 11 to 12. The catch (30) illustrated in FIGS. 1 to 7, FIG. 9, and FIGS. 11 to 12 is referred to as a “first catch” to distinguish it from the catch (30′, 30″) illustrated in FIGS. 13 and 14.

[0107] Referring to FIGS. 1 to 7, 9, 11 to 12, the first catch (30) prevents the panel door (20) from opening. That is, the first catch (30) prevents the panel door (20) from opening.

[0108] The first catch (30) is coupled to the panel door (20). Specifically, the first catch (30) is coupled to the back of the panel door (20) (specifically, the door plate).

[0109] When the panel door (20) rotates and opens or closes, the first catch (30) also rotates together with the panel door (20).

[0110] When the locking part (13) of the external operating handle (10) moves and one end of the locking part (13) protrudes outward by penetrating the through hole (11h) formed in the case (11) of the external operating handle (10), one end of the locking part (13) comes into contact with the first catch (30). Accordingly, the panel door (20) can no longer rotate.

[0111] The first catch (30) is formed in a plate shape with a preset thickness and is formed of a metal material. Since the first catch (30) is formed of a metal material, the first catch (30) is not easily damaged by external force.

[0112] The first hanging portion (30) includes a first plate portion (31) and a second plate portion (32).

[0113] Specifically, the first hanging portion (30) is formed in an 'ㄱ' shape and is divided into a first plate portion (31) and a second plate portion (32). In detail, the first plate portion (31) and the second plate portion (32) are formed integrally, and the first plate portion (31) and the second plate portion (32) are connected to form an 'ㄱ' shape.

[0114] The first plate (31) and the second plate (32) are formed in a plate shape with a preset thickness, and each has a preset length in one direction.

[0115] The first plate portion (31) and the second plate portion (32) are formed to be inclined at a preset angle. That is, the boundary area (34) where the first plate portion (31) and the second plate portion (32) are connected is bent, so that the first plate portion (31) and the second plate portion (32) have a preset angle.

[0116] The first plate (31) is attached to the back of the panel door (20) (specifically, the door plate).

[0117] One or more through holes (31h) are formed in the first plate (31). A fastening member (not shown) (first fastening member), such as a screw, bolt, or rivet, is placed in the through holes (31h).

[0118] The first fastening member is inserted into the through hole (31h) of the first plate portion (31) and the hole formed in the panel door (20) (specifically, the door plate), thereby connecting the first plate portion (31) and the panel door (20). By applying this connecting method, the first plate portion (31) (first catch portion (30)) has the effect of being easily connected to the panel door (20). This indicates convenience in manufacturing.

[0119] According to another embodiment of the present invention, the first plate (31) can be joined to the panel door (20) (specifically, the door plate) by a welding method.

[0120] The second plate (32) can be in contact with the locking portion (13). Specifically, the locking portion (13) is in contact with the second plate (32) to restrict movement of the second plate (32) (first catch portion (30)).

[0121] A hook projection (first hook projection) (321) is formed on the second plate (32).

[0122] The first hook projection (321) comes into contact with the locking portion (13).

[0123] The second plate (32) has one side (32a) and the other side (32b). The one side (32a) and the other side (32b) are faces facing opposite sides with a thickness interposed therebetween.

[0124] The first hanging protrusion (321) is formed by protruding in a direction parallel to the direction of one side (32a) (or the other side (32b)) of the second plate (32).

[0125] In detail, the first catch protrusion (321) is formed by protruding outward from a surface (32c) that forms the thickness of the second plate portion (32) (this is referred to as a “thickness surface”). For example, the first catch protrusion (321) is formed by protruding in a direction perpendicular to the thickness surface (32c) of the second plate portion (32).

[0126] The first hanging protrusion (321) is formed with a preset length from the edge of the second plate portion (32) toward the boundary area (34), which is the portion connected to the first plate portion (31). The edge of the second plate portion (32) represents an end positioned in the opposite direction to the direction in which the boundary area (34) is located.

[0127] As illustrated in Fig. 7, the protruding height of the first catch protrusion (321) may gradually increase from the edge of the second plate (32) toward the boundary region (34). This has the effect of reducing the size of the first catch protrusion (321). Alternatively, the protruding height of the first catch protrusion (321) may remain the same. This has the effect of increasing the convenience of manufacturing the first catch protrusion (321).

[0128] When the panel door (20) (specifically, the panel plate) is opened while the locking member (13) moves (forwards) in one direction, the first engaging protrusion (321) comes into contact with one end of the locking member (13) (see Fig. 12). Accordingly, the panel door (20) does not open.

[0129] The external operating handle of the present invention may further include a reinforcing member (first reinforcing member) (33).

[0130] As shown in FIGS. 2 to 6 and 8 to 9, the first reinforcing member (33) increases the contact area of ​​the locking member (13) to prevent the panel door (20) from opening.

[0131] The first reinforcing member (33) is formed in a plate shape with a preset thickness and has a preset length in one direction.

[0132] The first reinforcing part (33) is joined to the second plate part (32) of the first hanging part (30).

[0133] By combining the first reinforcing portion (33) and the second plate portion (32), the first reinforcing portion (33) and the second plate portion (32) come into contact with each other.

[0134] The first reinforcing portion (33) can be formed in the same shape as the second plate portion (32).

[0135] One surface (33a) of the first reinforcing portion (33) in contact with the second plate portion (32) and one surface (32a) of the second plate portion (32) in contact with the first reinforcing portion (33) can be formed to have the same shape. Accordingly, the area of ​​the first reinforcing portion (33) that is combined with the second plate portion (32) increases, and the area of ​​the locking portion (13) that is in contact with the second plate portion (32) increases.

[0136] The first reinforcing portion (33) has a hooking projection (second hooking projection) (331) having the same shape as the hooking projection (first hooking projection) (321) formed on the second plate portion (32) described above.

[0137] The second hook protrusion (331) comes into contact with the locking portion (13).

[0138] The first reinforcing member (33) has one side (33a) and the other side (33b). The one side (33a) and the other side (33b) are faces facing opposite sides with a thickness interposed therebetween.

[0139] The second hook protrusion (331) is formed by protruding in a direction parallel to the direction of one side (33a) (or the other side (33b)) of the first reinforcing part (33).

[0140] In detail, the second catch protrusion (331) is formed by protruding outward from the thickness surface (33c) of the first reinforcing portion (33). For example, the second catch protrusion (331) is formed by protruding in a direction perpendicular to the thickness surface (33c) of the first reinforcing portion (33).

[0141] The second hooking protrusion (331) is formed with a preset length from one edge of the longitudinal direction of the first reinforcing member (33) toward the other edge. The one edge and the other edge of the first reinforcing member (33) represent ends positioned in opposite directions.

[0142] As illustrated in Fig. 8, the protruding height of the second catch protrusion (331) may gradually increase from one edge of the first reinforcing member (33) toward the other edge. This has the effect of reducing the size of the second catch protrusion (331). Alternatively, the protruding height of the second catch protrusion (331) may remain the same. This has the effect of increasing the convenience of manufacturing the second catch protrusion (331).

[0143] The second hooking protrusion (331) is formed to have the same size as the first hooking protrusion (321) formed on the second plate (32).

[0144] The first reinforcing portion (33) is laminated with the second plate portion (32). At this time, the second catch protrusion (331) is laminated with the first catch protrusion (321). That is, the second catch protrusion (331) is positioned corresponding to the first catch protrusion (321). Accordingly, one surface of the first catch protrusion (321) and one surface of the second catch protrusion (331) face each other and come into contact with each other.

[0145] When the panel door (20) (specifically, the panel plate) is opened while the locking portion (13) moves (forwards) in one direction, the first engaging protrusion (321) and the second engaging protrusion (331) come into contact with one end of the locking portion (13). Accordingly, the panel door (20) does not open.

[0146] In each of the second plate (32) and the first reinforcing portion (33), one or more through holes (32h, 33h) are formed for connection between each other.

[0147] The through hole (32h) formed in the second plate (32) is a hole that penetrates one side (32a) and the other side (32b) of the second plate (32), and the through hole (33h) formed in the first reinforcing part (33) is a hole that penetrates one side (33a) and the other side (33b) of the first reinforcing part (33).

[0148] When the first reinforcing portion (33) is laminated with the second plate portion (32), the through hole (33h) formed in the first reinforcing portion (33) and the through hole (32h) formed in the second plate portion (32) are connected to each other.

[0149] A fastening member (second fastening member) (m) (see Fig. 6), such as a screw, bolt, or rivet, is placed in the above-mentioned through hole (32h, 33h).

[0150] The second fastening member (m) is inserted into the through hole (33h) formed in the first reinforcing member (33) and the through hole (32h) formed in the second plate member (32), thereby connecting the first reinforcing member (33) and the second plate member (32). That is, the first catch (30) and the first reinforcing member (33) are fastened by the second fastening member (m).

[0151] According to another embodiment of the present invention, the first reinforcing portion (33) and the second plate portion (32) can be joined to each other by welding.

[0152] Meanwhile, the aforementioned catch portion (first catch portion (30)) of the present invention can be formed in a different shape.

[0153] Fig. 13 shows the first catch (30) of the present invention and another catch (second catch (30′)), and Fig. 14 shows the first catch (30) of the present invention and another catch (third catch (30″)).

[0154] First, the second catch (30′) illustrated in Fig. 13 will be described.

[0155] The second catch (30') has a difference from the first catch (30) described above in that it has no catch protrusion (first catch protrusion) (321) and a catch insertion groove (first catch insertion groove) (321'). Therefore, except for the above difference, the second catch (30') is the same as or similar to the first catch (30).

[0156] In the following description of the second catch (30'), components that are distinct from the first catch (30) are specifically described, and identical or similar components or parts are replaced with the contents described in the first catch (30).

[0157] The second catch (30′) does not have the catch projection (first catch projection) (321) formed in the first catch (30), and instead has a catch insertion groove (first catch insertion groove) (321′).

[0158] The first hook insertion groove (321′) is formed in the second plate (32).

[0159] A locking portion (13) is inserted into the first engaging insertion groove (321′). Specifically, one end of the locking portion (13) is inserted into the first engaging insertion groove (321′) to restrict movement of the second plate portion (32) (second engaging portion (30′)).

[0160] In the second plate (32), the first hook insertion groove (321′) is formed at a position where one end of the locking portion (13) is inserted.

[0161] The first hook insertion groove (321′) is a hole that penetrates one side (32a) and the other side (32b) of the second plate (32), and is formed so that one side is open.

[0162] The shape of the first hook insertion groove (321′) may be formed into a polygon, as illustrated in Fig. 13. However, the shape of the first hook insertion groove (321′) is not limited thereto, and may be formed into a shape such as a semicircle or a semi-ellipse.

[0163] When the locking member (13) moves in one direction and one end of the locking member (13) is inserted into the first catch insertion groove (321′), the panel door (20) (specifically, the panel plate) does not open (opening is restricted).

[0164] In detail, when the panel door (20) is opened while the locking part (13) moves in one direction and one end of the locking part (13) is inserted into the first catch insertion groove (321′), the inner surface of the first catch insertion groove (321′) comes into contact with one end of the locking part (13).

[0165] A reinforcing part (second reinforcing part) (not shown) can be combined with the second hanging part (30′).

[0166] The second reinforcing portion has a difference from the first reinforcing portion (33) described above in that it has no catch protrusion (second catch protrusion) (331) and a catch insertion groove (second catch insertion groove) is formed. Therefore, except for the above difference, the second reinforcing portion is identical or similar to the first reinforcing portion (33).

[0167] In the following description of the second reinforcement part, components that are distinct from the first reinforcement part (33) are specifically described, and identical or similar components or parts are replaced with the contents described in the first reinforcement part (33).

[0168] The external operating handle of the present invention may further include a reinforcing member (second reinforcing member) (not shown).

[0169] The second reinforcing part does not have the catch projection (second catch projection) (331) formed in the first reinforcing part (33), and instead has a catch insertion groove (second catch insertion groove).

[0170] The second reinforcing portion has a hook insertion groove (second hook insertion groove) having the same shape as the hook insertion groove (first hook insertion groove) (321′) formed in the second plate portion (32) described above.

[0171] A locking portion (13) is inserted into the second hook insertion groove. Specifically, one end of the locking portion (13) is inserted into the second hook insertion groove to restrict movement of the second reinforcing portion and the second plate portion (32) (the second hooking portion (30′)).

[0172] The second hook insertion groove is a hole that penetrates one side and the other side of the second reinforcement part, and is formed so that one side is open.

[0173] The second hook insertion groove is formed to have the same size as the first hook insertion groove (321′) formed in the second plate (32).

[0174] The second reinforcing portion is laminated with the second plate portion (32). At this time, the second catch insertion groove communicates with the first catch insertion groove (321'). That is, the second catch insertion groove is positioned corresponding to the first catch insertion groove (321').

[0175] When the locking part (13) moves and one end of the locking part (13) is inserted into the first locking insertion groove (321′) and the second locking insertion groove, the panel door (20) (specifically, the panel plate) does not open.

[0176] Since one end of the locking portion (13) is inserted into the engaging insertion groove (groove shape), the clearance (gap) that allows the panel door (20) to open can be minimized. In addition, since the engaging insertion groove is open on one side, even if only a portion of one end of the locking portion (13) is inserted into the engaging insertion groove, there is an effect in which the panel door (20) does not open.

[0177] Below, the third catch (30″) shown in Fig. 14 is described.

[0178] The third catch (30″) has a difference from the first catch (30) described above in that it has no catch protrusion (first catch protrusion) (321) and a catch insertion hole (first catch insertion hole) (321″). Therefore, except for the above difference, the third catch (30″) is the same as or similar to the first catch (30).

[0179] In the following description of the third catch (30″), components that are distinct from the first catch (30) are specifically described, and identical or similar components or parts are replaced with the contents described in the first catch (30).

[0180] The third catch (30″) does not have the catch projection (first catch projection) (321) formed in the first catch (30), and instead has a catch insertion hole (first catch insertion hole) (321″).

[0181] The first hanging insertion hole (321″) is formed in the second plate (32).

[0182] A locking portion (13) is inserted into the first catch insertion hole (321″). Specifically, one end of the locking portion (13) is inserted into the first catch insertion hole (321″) to restrict movement of the second plate portion (32) (third catch portion (30″)).

[0183] In the second plate (32), the first hook insertion hole (321″) is formed at a position where one end of the locking portion (13) is inserted.

[0184] The first hook insertion hole (321″) is a hole that penetrates one side (32a) and the other side (32b) of the second plate (32).

[0185] The shape of the first hook insertion hole (321″) may be formed in a circular shape, as illustrated in Fig. 14. However, the shape of the first hook insertion hole (321″) is not limited thereto, and may be formed in a shape such as an ellipse or a polygon.

[0186] When the locking member (13) moves in one direction and one end of the locking member (13) is inserted into the first catch insertion hole (321″), the panel door (20) (specifically, the panel plate) does not open (opening is restricted).

[0187] In detail, when the panel door (20) is opened while the locking part (13) moves in one direction and one end of the locking part (13) is inserted into the first catch insertion hole (321″), the inner surface of the first catch insertion hole (321″) comes into contact with one end of the locking part (13).

[0188] A reinforcing member (third reinforcing member) (not shown) can be combined with the third hanging member (30″).

[0189] The third reinforcing portion has a difference from the first reinforcing portion (33) described above in that it has no catch protrusion (second catch protrusion) (331) and a catch insertion hole (second catch insertion hole) is formed. Therefore, except for the above difference, the third reinforcing portion is identical or similar to the first reinforcing portion (33).

[0190] In the following description of the third reinforcement part, components that are distinct from the first reinforcement part (33) are specifically described, and identical or similar components or parts are replaced with the contents described in the first reinforcement part (33).

[0191] The external operating handle of the present invention may further include a reinforcing member (third reinforcing member) (not shown).

[0192] The third reinforcing part does not have the catch projection (second catch projection) (331) formed in the first reinforcing part (33), and instead has a catch insertion hole (second catch insertion hole).

[0193] The third reinforcing portion has a hook insertion hole (second hook insertion hole) having the same shape as the hook insertion hole (first hook insertion hole) (321″) formed in the second plate portion (32) described above.

[0194] A locking member (13) is inserted into the second hook insertion hole. Specifically, one end of the locking member (13) is inserted into the second hook insertion hole to restrict movement of the third reinforcing member and the second plate member (32) (third hooking member (30″)).

[0195] The second hook insertion hole is a hole that penetrates one side and the other side of the third reinforcement part.

[0196] The second hook insertion hole is formed to have the same size as the first hook insertion hole (321″) formed in the second plate (32).

[0197] The third reinforcing portion is laminated with the second plate portion (32). At this time, the second catch insertion hole is in communication with the first catch insertion hole (321″). That is, the second catch insertion hole is positioned corresponding to the first catch insertion hole (321″).

[0198] When the locking part (13) moves and one end of the locking part (13) is inserted into the first catch insertion hole (321″) and the second catch insertion hole, the panel door (20) (specifically, the panel plate) does not open.

[0199] Since one end of the locking member (13) is inserted into the catch insertion hole (hole shape), there is almost no clearance (gap) through which the panel door (20) can be opened. Therefore, the panel door (20) has the effect of being firmly closed.

Claims

1. External operating handle for connection to the circuit breaker; and It is coupled to the panel door and includes a catch that comes into contact with the locking portion of the external operating handle, An external operating handle assembly of a circuit breaker, wherein, in a normal state where current flows through the circuit breaker, the locking member moves in one direction to contact the engaging member.

2. In paragraph 1, The above-mentioned catch portion includes a first plate portion that is coupled to the panel door, and a second plate portion that is arranged to be inclined at a preset angle with the first plate portion, An external operating handle assembly of a wiring circuit breaker, wherein the locking portion of the external operating handle is in contact with the second plate portion.

3. In paragraph 2, A first hooking protrusion is formed on the second plate portion, An external operating handle assembly of a wiring circuit breaker, wherein when the panel door is opened while the locking part is moved in one direction, the first engaging projection comes into contact with one end of the locking part.

4. In paragraph 3, An external operating handle assembly of a wiring circuit breaker, wherein the first hanging protrusion is formed by protruding in a direction parallel to the direction of one side or the other side of the second plate.

5. In paragraph 4, An external operating handle assembly of a wiring circuit breaker, wherein the first hanging protrusion is formed with a preset length from the edge of the second plate portion toward a boundary area connected to the first plate portion.

6. In paragraph 5, An external operating handle assembly of a wiring circuit breaker, wherein the first hanging protrusion has a protruding height that gradually increases from the edge of the second plate toward the boundary area.

7. In paragraph 2, An external operating handle assembly of a wiring circuit breaker, wherein a first fastening member is inserted into a hole formed in the panel door and a through hole formed in the first plate portion, thereby connecting the panel door and the first plate portion.

8. In paragraph 2, Further comprising a reinforcing member that is joined to the second plate, An external operating handle assembly of a circuit breaker, wherein one surface of the reinforcing portion that contacts the second plate portion and one surface of the second plate portion that contacts the reinforcing portion are formed to have the same shape.

9. In paragraph 8, A second hooking protrusion is formed on the above reinforcement portion, An external operating handle assembly of a wiring circuit breaker, wherein when the panel door is opened while the locking portion is moved in one direction, the second engaging projection comes into contact with one end of the locking portion.

10. In paragraph 9, An external operating handle assembly of a circuit breaker for wiring, wherein the second hanging protrusion is formed by protruding in a direction parallel to the direction of one side or the other side of the reinforcing part.

11. In paragraph 10, An external operating handle assembly of a circuit breaker for wiring, wherein the second hanging protrusion is formed with a preset length from one edge of the longitudinal direction of the reinforcing member toward the other edge.

12. In paragraph 11, An external operating handle assembly of a wiring circuit breaker, wherein the second hanging protrusion has a height that gradually increases as it protrudes from one edge of the reinforcing member toward the other edge.

13. In paragraph 8, An external operating handle assembly of a circuit breaker for wiring, wherein a second fastening member is inserted into a through hole formed in the second plate portion and a through hole formed in the reinforcing portion, thereby connecting the second plate portion and the reinforcing portion.

14. In paragraph 2, A hook insertion groove is formed in the second plate above, The above-mentioned hook insertion groove is a hole that penetrates one side and the other side of the second plate portion, and is formed so that one side is open. An external operating handle assembly of a wiring circuit breaker, wherein when the panel door is opened while the locking part moves in one direction and one end of the locking part is inserted into the engaging insertion groove, the inner surface of the engaging insertion groove comes into contact with one end of the locking part.

15. In paragraph 2, A hook insertion hole is formed in the second plate above, The above-mentioned hook insertion hole is a hole that penetrates one side and the other side of the second plate, An external operating handle assembly of a wiring circuit breaker, wherein when the panel door is opened while the locking part moves in one direction and one end of the locking part is inserted into the engaging insertion hole, the inner surface of the engaging insertion hole comes into contact with one end of the locking part.

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