KR102698247B1 - Air circuit breaker - Google Patents

Abstract

An air circuit breaker is disclosed. According to one aspect of the present invention, an air circuit breaker may include: a cradle having one open side; a circuit breaker main body extendable and withdrawable through one side of the cradle; an interlock lever connected to a button of the circuit breaker main body so as to be positioned at a first position when the button is pressed and at a second position located at one side of the first position when the button is not pressed; a transport module provided in the cradle for extending and withdrawing the circuit breaker main body; and a restraint module having a restraint plate movably installed in front of the transport module so as to fix the interlock lever at the first position when it is in a locked position and to allow the interlock lever to move from the first position to the second position when it is in an unlocked position.

Description

Air circuit breaker

The present invention relates to an air circuit breaker, and more specifically, to an air circuit breaker having an interlock device that restricts or allows the introduction/withdrawal and positional movement of a main body.

An air circuit breaker (ACB) is a device that is generally installed in low-voltage distribution lines and uses air as an arcing medium to systematically perform transmission and reception, switching, and stopping of power systems, and to protect human life and peripheral equipment by cutting off the circuit when an abnormal current occurs.

There are fixed types of circuit breakers that are fixed to a specific location and drawable types in which the circuit breaker main body is installed so that it can be drawn into and out of the cradle. In the case of drawable circuit breakers, they are divided into the Disconnect Position, Test Position, and Connect Position according to the relative position of the circuit breaker main body within the cradle.

At this time, the disconnect position is a state in which the circuit breaker body is withdrawn from the cradle and the control power terminal is disconnected (non-operating state), the test position is a state in which the circuit breaker body is inserted into the cradle a predetermined distance and the control power terminal is connected so that the connection status of the circuit breaker can be checked, and the connect position is a state in which the circuit breaker body is completely inserted into the cradle and the body terminal is connected to the cradle terminal so that the main circuit is energized (operating state).

An air circuit breaker is a circuit breaker installed at the top of a low-voltage distribution system, protecting the load from high fault currents. Therefore, the control of an air circuit breaker must be done very carefully, and no one other than the person in charge should control the circuit breaker.

For this purpose, interlock devices are used in air circuit breakers to prevent unauthorized main circuit energization and to prevent arbitrary movement of the circuit breaker body for purposes such as maintaining the operating or non-operating state or for user safety.

The interlock function is generally implemented by applying it to the circuit breaker main body to prevent arbitrary power input, or by applying it to the cradle to prevent arbitrary movement of the position of the circuit breaker main body. In other words, the interlock device is implemented by two interlocks applied to the circuit breaker main body and the cradle.

There has been a demand for the development of an air circuit breaker that integrates and simplifies the interlock devices that perform these interlock functions. In addition, there has been a demand for the development of an air circuit breaker that can immediately reflect customer convenience and needs by making it easy to maintain and replace interlock devices.

The present invention is intended to solve the above problems, and an object of the present invention is to provide an air circuit breaker having an interlock device capable of simultaneously implementing a function of restricting the closing operation of a circuit breaker main body and a function of restricting the positional movement of the circuit breaker main body within a cradle.

Another object of the present invention is to provide an air circuit breaker having an interlock device capable of maintaining the opening limiting function of the circuit breaker main body while maintaining the position movement limiting function of the circuit breaker main body by maintaining the OFF button of the circuit breaker main body pressed.

Another object of the present invention is to provide an air circuit breaker having an interlock device, which is easy to maintain, repair and replace for the operating means that restrains the interlock device, thereby enabling immediate reflection of customer needs.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

According to one aspect of the present invention, an air circuit breaker is provided, comprising: a cradle having one open side; a circuit breaker main body extendable and withdrawable through one side of the cradle; an interlock lever connected to a button of the circuit breaker main body and formed to be at a first position when the button is pressed and at a second position when the button is not pressed; a transport module provided in the cradle to extend and withdraw the circuit breaker main body; and a restraint module having a restraint plate movably installed in front of the transport module, the restraint plate fixing the interlock lever at the first position when it is in a locked position and allowing the interlock lever to move from the first position to the second position when it is in an unlocked position.

At this time, the cover plate covering the outer surface of the transport module and having a hole formed therein; and a shutter plate positioned between the transport module and the cover plate and opening and closing the cover plate hole are further included, and the restraint module can fix the shutter plate in a position to close the cover plate hole when moved to the locking position, and can allow the movement of the shutter plate to open and close the cover plate hole when moved to the release position.

At this time, the restraint module may include an operating means for moving the restraint plate.

At this time, a receiving groove for receiving the operating means may be formed on the outer surface of the cover plate, and the restraining plate may be arranged on the inner surface.

At this time, the operating means may be a key assembly.

At this time, a key assembly hole through which the key assembly can penetrate may be formed on the bottom surface of the receiving home.

At this time, the cover plate may have a first guide protrusion formed along the direction of movement of the restraint plate on both sides of the restraint plate.

At this time, a second guide protrusion protruding toward the restraint plate may be formed on the cover plate, and a guide groove may be formed in the restraint plate, into which the second guide protrusion is inserted, and which extends along the direction of movement of the restraint plate.

At this time, a cover member covering the receiving groove may be installed on the cover plate.

At this time, the direction of movement of the interlock lever and the direction of movement of the restraint plate can be perpendicular to each other.

At this time, a spring installation part may be provided on the restraint plate, in which a return spring is installed to provide elastic force for returning the restraint plate to one position.

At this time, a restraining projection that restricts or allows the movement of the interlock lever may be formed to protrude toward the interlock lever on the restraining plate.

At this time, the restraint projection can support one side of the interlock lever from the second position toward the first position in the locked position.

At this time, the key assembly may include a rotating cylinder that rotates by the key; and a lever provided on one side of the rotating cylinder and rotating together with the rotating cylinder to pressurize and move the restraining plate.

At this time, the lever may be formed to protrude toward the restraint plate, and a lever hole may be formed in the restraint plate in the direction of movement of the restraint plate so that the lever may be inserted and rotated.

At this time, the key assemblies are provided in pairs of two, and when at least one of the pair of key assemblies is positioned at a specific position, the restraint plate can be positioned and fixed at the locking position.

According to the above configuration, the air circuit breaker according to one embodiment of the present invention can simultaneously implement a function of restraining the insertion motion of the circuit breaker main body and a function of restraining the positional movement of the circuit breaker main body within the cradle by fixing the interlock lever in a first position corresponding to a state in which the off button is pressed by positioning the restraint plate in a locked position and closing the cover plate hole through which the handle for withdrawing and withdrawing the circuit breaker main body enters and exits.

In addition, the air circuit breaker according to one embodiment of the present invention can maintain the function of limiting the movement of the circuit breaker main body while maintaining the function of limiting the input of the circuit breaker main body by manipulating the key assembly capable of moving and position-fixing the restraining plate to position-fix the restraining plate at a position that limits the movement of the interlock lever and the shutter plate.

In addition, in an air circuit breaker according to one embodiment of the present invention, a receiving groove for receiving a key assembly for moving a restraint plate is formed on the outer surface of a cover plate covering the outer surface of a transport module, and a restraint plate is arranged on the inner surface so that the key assembly can be separated without removing the cover plate from the air circuit breaker, so that maintenance, repair, and replacement of the key assembly can be easily performed, thereby immediately reflecting customer needs.

It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be inferred from the composition of the invention described in the detailed description or claims of the present invention.

Fig. 1 is a perspective view of an air circuit breaker according to one embodiment of the present invention. For the purpose of explaining the invention, the housing is indicated by a dotted line, and the components seen through the housing are indicated by a solid line.
FIG. 2 is an exploded perspective view of the cradle and circuit breaker main body with the housing of the circuit breaker separated according to one embodiment of the present invention.
FIG. 3 is a perspective view of a state in which a transport module, a restraint module, a shutter plate, and a front cover of an air circuit breaker are combined according to one embodiment of the present invention.
FIGS. 4 and 5 are exploded perspective views of the transport module, restraint module, shutter plate, and cover plate of an air circuit breaker according to one embodiment of the present invention, viewed from different angles, respectively.
FIG. 6 is an exploded perspective view of a restraint module and cover plate of an air circuit breaker according to one embodiment of the present invention.
Fig. 7 is a partial perspective view showing a circuit breaker body inserted into a cradle according to one embodiment of the present invention. For the purpose of explaining the invention, the cover plate is not shown.
FIGS. 8 and 9 are perspective views of a key assembly and a restraint plate according to one embodiment of the present invention, respectively, viewed from different angles.
FIG. 10 is an exploded perspective view of a key assembly and a restraint plate according to one embodiment of the present invention illustrated in FIG. 8.
FIG. 11 is a drawing illustrating the operation process of a restraint plate, a shutter plate, and an interlock lever according to one embodiment of the present invention. For the purpose of explaining the invention, each component is illustrated briefly.
FIGS. 12 to 15 are drawings illustrating a state in which a key assembly and a restraint plate are viewed from the transfer module side toward the cover plate side according to one embodiment of the present invention, FIG. 12 is a drawing illustrating a state in which both the first and second key assemblies are in an unlocked state, FIG. 13 is a drawing illustrating a case in which the first key assembly is in a locked state and the second key assembly is in an unlocked state, FIG. 14 is a drawing illustrating a case in which the first key assembly is in an unlocked state and the second key assembly is in a locked state, and FIG. 15 is a drawing illustrating a case in which both the first and second key assemblies are in a locked state.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts that are not related to the description are omitted in the drawings, and the same reference numerals are assigned to the same or similar components throughout the specification.

The words and terms used in this specification and claims should not be construed as limited to their usual or dictionary meanings, but should be interpreted as having meanings and concepts consistent with the technical idea of the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best describe his or her invention.

In this specification, it should be understood that terms such as “include” or “have” are intended to describe the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

When a component is said to be "in front of," "behind," "above," or "below" another component, unless there are special circumstances, it includes not only being positioned "in front of," "behind," "above," or "below" the other component in direct contact with it, but also cases where there are other components intervening therebetween. Furthermore, when a component is said to be "connected" to another component, unless there are special circumstances, it includes cases where they are indirectly connected to each other as well as cases where they are directly connected to each other.

In describing the drawings below, each direction is defined based on the direction in which the circuit breaker main body of the air circuit breaker is introduced or withdrawn in the drawings. More specifically, as seen in FIG. 2, the direction in which the circuit breaker main body (200) of the air circuit breaker (1) is introduced from the cradle (100) is defined as forward, and the direction in which the circuit breaker main body (200) is introduced into the cradle (100) is defined as rearward. In addition, the direction in which the control power supply unit (113) is located in the cradle (100) is defined as upward, and the direction in which the transfer module (300) is located is defined as downward.

An air circuit breaker according to one embodiment of the present invention is an air circuit breaker having an interlock device capable of simultaneously implementing and maintaining a function of limiting the insertion of a circuit breaker main body and a function of restraining the movement of a circuit breaker main body by having a restraining plate positionally fix an interlock lever in a position corresponding to a state in which an off button of a circuit breaker main body is pressed, and at the same time fixing a shutter plate in a position to close a hole of a cover plate through which a handle for withdrawing and withdrawing a circuit breaker main body enters and exits, and then a key assembly positionally fixing the restraining plate.

Fig. 1 is a perspective view of an air circuit breaker according to one embodiment of the present invention. For the purpose of explaining the invention, the housing is indicated by a dotted line, and the structure seen through the housing is indicated by a solid line. Fig. 2 is an exploded perspective view of the cradle and the circuit breaker main body with the housing of the air circuit breaker separated according to one embodiment of the present invention.

Referring to FIGS. 1 and 2, an air circuit breaker (1) according to one embodiment of the present invention may include a housing (3), a cradle (100), a circuit breaker main body (200), a transfer module (300), a restraint module (400), a shutter module (500) (illustrated in FIG. 4), a front cover (600), and an interlock lever (700). Here, the circuit breaker main body (200) and the cradle (100) are shown so that the internal configuration is visible, and only major components are shown and other components are omitted so that the gist of the present invention can be easily understood.

A space for accommodating a cradle (100) and a circuit breaker main body (200) may be provided inside the housing (3). The housing (3) may perform a function of protecting the main components of the air circuit breaker (1) from external impacts, etc. A plurality of holes may be formed in the housing (3) so that the components for operating the cradle (100) and the circuit breaker main body (200) and the components forming the distribution lines may be exposed to the outside.

The cradle (100) may be composed of a cradle body (110) and a cradle terminal (120). The cradle body (110) may be formed in a box shape, and an inlet/outlet (111) through which a circuit breaker main body (200) is introduced/withdrawn may be positioned on the front of the cradle body (110). The cradle body (110) supports the circuit breaker main body (200), and allows the circuit breaker main body (200) to move to a disconnect position, a test position, and a connect position, and to be fixed in each position. In addition, the cradle (100) may be connected to a main circuit to mediate a connection between the circuit breaker main body (200) and the main circuit.

Components that assist the insertion and withdrawal of the blocking main body (200) may be arranged on the side of the cradle body (110). For example, referring to FIG. 2, a main body guide (112) that guides the insertion and withdrawal of the blocking main body (200) may be provided on the inner surface of the cradle body (110).

A cradle terminal (120) may be installed on the rear of the cradle body (110). The cradle terminal (120) may be composed of a power-side terminal and a load-side terminal, and each terminal may be provided for each phase. For example, in the case of a three-phase circuit breaker, three power-side terminals and three load-side terminals may be provided, respectively.

An arc box (not shown) may be provided on the rear surface of the upper surface of the cradle body (110). The arc box may perform the function of discharging an arc generated in the arc protection section (230) of the circuit breaker main body (200) described below to the outside of the air circuit breaker (1).

A control power supply unit (113) may be formed on the front part of the upper surface of the cradle body (110). The control power supply unit (113) may perform maintenance operations such as a blocking operation test or residual current removal when the cradle (100) and the circuit breaker main body (200) are not connected to the main circuit.

A transfer module (300) capable of supporting and withdrawing the blocking main body (200) may be installed on the lower surface of the cradle body (110). At this time, the transfer module (300) may form the lower surface of the cradle body (110).

FIG. 3 is a perspective view of a state in which a transport module, a restraint module, a shutter plate, and a front cover of an air circuit breaker are combined according to one embodiment of the present invention. FIGS. 4 and 5 are exploded perspective views of a transport module, a restraint module, a shutter plate, and a cover plate of an air circuit breaker according to one embodiment of the present invention, respectively, viewed from different angles. FIG. 6 is an exploded perspective view of a restraint module and a cover plate of an air circuit breaker according to one embodiment of the present invention.

Referring to FIGS. 3 to 5, the transfer module (300) may be composed of a base plate (310), an upper cover plate (320), and a pull-out device (330, 340).

The base plate (310) can provide a frame on which other components of the transport module (300) can be mounted and supported. The base plate can be composed of a back portion (312) and a front portion (314).

The back surface (312) may be formed as a plate-shaped member forming the lower surface of the transport module (300). The front surface (314) may be folded upward from the front edge of the back surface (312) to cover the front of the introduction/withdrawal device (330, 340).

A draw-in/out device (330, 340) for drawing in/out the blocking body (200) may be installed on the upper surface of the back surface (312). The draw-in/out device (330, 340) may include a draw-in/out screw (330) and a positioning screw (340).

More specifically, a pull-out screw (330) that provides power for the pull-out/pull-out movement of the blocking body (200) by receiving the force of the handle may be formed to extend in the forward/backward direction at the center of the upper surface of the back surface (312). A positioning screw (340) may be arranged side by side on one side of the pull-out screw (330).

A hole may be formed in the front part (314) to expose the front end of the lead-in screw (330) and the front end of the positioning screw (340) to the front.

A tool groove (331) formed in a polygonal shape (e.g., hexagonal) may be formed at the front end of the insertion/withdrawal screw (330). The handle (4) (shown in FIG. 1) passes through the handle insertion hole (613) of the front cover (600) and is coupled to the tool groove (331) and then rotates in one direction to transmit power for inserting/withdrawing the blocking main body (200) to the transfer module (300).

Referring again to FIG. 2, the circuit breaker main body (200) may include a contact portion (not shown), a switching mechanism portion (220), a trip portion (not shown), and a breaker portion (230). At this time, the switching mechanism portion (220) may provide a driving force to cause opening and closing of the contact portion.

The opening/closing mechanism (220) may include an on button (221) and an off button (222) for opening/closing the contact portion. When the on button (221) or the off button (222) is pressed, the main shaft (240) rotates in one direction by the driving force provided by the opening/closing mechanism (220) to open/close the contact portion. As a result, the main circuit may be powered off or on.

Fig. 7 is a partial perspective view showing a circuit breaker body inserted into a cradle according to one embodiment of the present invention. For the purpose of explaining the invention, the cover plate is not shown.

Referring to FIG. 7, the off button (222) may be installed to be rotatable around the off button rotation axis (225). When the off button (222) is pressed, the off button (222) moves backward, and the off button engaging portion (223) facing the off button (222) around the off button rotation axis (225) may move forward. The off button (222) may be equipped with a torsion spring. Accordingly, when the external force pressing the off button (222) is removed, the off button (222) may return to the original position.

At this time, the off button catch portion (223) can protrude to the outside of the side wall (224) by penetrating the off button catch hole (2241) formed in the side wall (224). The off button catch portion (223) can operate the rotating member (226) and the lifting member (228) provided on one side of the opening/closing mechanism (220).

A rotary member (226) that can transmit the operation of the off button engaging portion (223) to the lifting member (228) can be installed at the lower side of the off button engaging hole (2241). A rotary member rotating shaft (2261) can be installed at the center of the rotary member (226). The rotary member rotating shaft (2261) is rotatably installed on the side wall (224) and can also be formed so as to support the rotary member (226).

The rotary member (226) may be formed as a plate having two arms that extend at a predetermined angle centered on the central portion. An off-button wearing hole (2263) into which an off-button catch (223) is inserted may be formed at the end of the portion extending upward among the two arms. After being combined with the off-button wearing hole (2263), the off-button catch (223) may slide in the off-button catch hole (2241) to operate the rotary member (226).

The other of the two arms may be formed to protrude backwards, and a hook (2262) may be formed at the end to transmit the motion of the rotary member (226) to the lifting member (228). At this time, the other of the two arms may be formed to bend in a bow shape. Accordingly, the hook (2262) of the rotary member (226) may perform a linear movement in the up-and-down direction.

The lifting member (228) can perform an up-and-down movement by being fitted into a groove formed in the upper and lower direction at the bottom of the side wall (224). At this time, the lifting member (228) can be formed of a plate-shaped lifting member body (2282) that extends in the upper and lower direction and a pressing plate (2284) that can press the interlock lever (700) downward at the lower end of the lifting member body (2282). At this time, a hook hole (2283) into which a hook (2262) of a rotating member (226) can be inserted and fitted can be formed at the upper end of the lifting member body (2282).

When the off button (222) is pressed, the off button (222) moves backward and rotates, and in conjunction with this, the rotating member (226) can rotate clockwise (when viewed from the left side of FIG. 6) around the rotating member rotation axis (2261). In response, the lifting member (228) can move upward.

When the external force pressing the off button (222) is removed, the off button (222) returns to the original position by the restoring force of the torsion spring, and in conjunction with this, the rotating member (226) can rotate counterclockwise (when viewed from the left side of FIG. 6). In response, the lifting member (228) moves downward.

The on button (221) can be placed on the right side of the off button (222). The on button (221) can operate the opening/closing mechanism (220) to cause an opening operation. When the on button (221) is pressed, the contact part can move and be energized. Meanwhile, the on button (221) is configured not to operate when the off button (222) is pressed.

Referring again to FIG. 4, the interlock lever (700) may be installed on the front of the back surface (312) of the base plate (310). At this time, the interlock lever (700) may be formed with a triangular protrusion (710) whose length becomes narrower as it goes upward.

An interlock lever hole (321) may be formed on the upper side of the upper cover plate (320) so that the protrusion (710) can operate by penetrating the upper cover plate (320). The protrusion (710) can contact the lower surface of the pressing plate (2284) (illustrated in FIG. 7) of the aforementioned lifting member (228) through the interlock lever hole (321).

FIG. 11 is a drawing illustrating the operation process of a restraint plate, a shutter plate, and an interlock lever according to one embodiment of the present invention. For the purpose of explaining the invention, each component is illustrated briefly.

Referring to FIG. 4 and FIG. 11 together, the interlock lever (700) may be positioned at a second position moved downward (or toward the back surface (312) of the base plate (310)) as in (a) of FIG. 11. In addition, the interlock lever (700) may be positioned at a first position moved upward (or toward the upper cover plate (320)) as in (b) of FIG. 11. The interlock lever (700) may be formed to be movable (up and down-movable based on FIG. 4) between the first position and the second position.

Meanwhile, referring again to Fig. 4, the interlock lever (700) can receive an upward force by the interlock lever return spring. Accordingly, the interlock lever (700) can be positioned in the first position when no external force is applied.

Referring to FIG. 7 and FIG. 11 to explain the movement of the interlock lever in more detail, when the off button (222) is pressed, the lifting member (228) moves upward, so that the interlock lever (700) moves to the first position by the elastic force of the interlock lever return spring (720). When the off button (222) returns to the original position, the lifting member (228) moves downward, so that the protrusion (710) of the interlock lever (700) is pressed downward by the pressing plate (2284) of the lifting member (228) and moves to the second position.

Referring again to FIG. 4, a shutter module may be installed on one side of the front portion (314) of the base plate (310). The shutter module may be composed of a shutter plate (510) and a shutter module return spring (not shown).

The shutter plate (510) covers the right side of the front part (314) of the base plate (310) and can be installed so as to be movable in the horizontal direction. A shutter protrusion (520) that protrudes to the left can be formed at the lower left side of the shutter plate (510).

Referring to (a) of FIG. 4 and FIG. 11, when the interlock lever (700) is positioned at the second position, the shutter protrusion (520) is caught by the interlock lever (700), thereby restricting the leftward movement of the shutter plate (510). Referring to (b) of FIG. 11, when the interlock lever (700) is positioned at the first position, the shutter protrusion (520) is not caught by the interlock lever (700), thereby allowing the leftward movement of the shutter plate (510).

Referring to the enlarged view of Fig. 4, a handle hole (511) into which a handle can be inserted can be formed in the shutter plate (510). At this time, the handle hole (511) is formed so that only a part of the tool groove (331) formed at the end of the lead-in/out screw (330) is exposed in a normal state in which no external force is applied.

More specifically, a handle insertion prevention portion (512) may be formed in a portion adjacent to the handle hole (511) of the shutter plate (510) (left portion based on the enlarged view of FIG. 4). The insertion of the handle into the tool groove (331) may be restricted by the handle insertion prevention portion (512).

When the off button (222) is pressed, the interlock lever (700) is positioned in the first position, so that the shutter plate (510) is allowed to move to the left, and the handle can be engaged with the tool groove (331) of the withdrawal screw (330) through the handle hole (511). As a result, the withdrawal of the blocking body (200) can be made possible.

A shutter module return spring may be provided to provide a force for returning the shutter plate (510) to its original position. A spring fixing part (530) on which the shutter module return spring is installed may be formed on the shutter plate (510).

The spring fixing member (530) may be formed by two projections that protrude forward and are arranged in a horizontal direction. A shutter module return spring may be installed between the two projections. A part of the shutter module return spring may be fixed to a part of the front cover plate (610).

In a normal state where no external force is applied, the shutter plate (510) is moved to the right and positioned so as to cover a part of the tool groove (331) of the insertion/extraction screw (330). When the restraint by the interlock lever (700) is released, if the handle (4) (shown in FIG. 1) is inserted into the tool groove (331), the insertion prevention portion is pushed to the left by the handle (4) (i.e., the shutter plate (510) is pushed to the left), so that the user can rotate the insertion/extraction screw (330) using the handle (4).

When the handle (4) is removed, the shutter plate (510) moves to the right by the shutter module return spring, so that a portion of the tool groove (331) is covered by the handle insertion prevention portion (512).

Referring to FIGS. 5 and 6, a front cover (600) covering the front of the transport module (300) and the shutter module (500) may be positioned in front of the transport module (300). The front cover (600) may be composed of a front cover plate (610) and a receiving groove cover member (620).

At this time, a restraint module (400) may be installed on the front cover plate (610). The restraint module (400) may be composed of a key assembly (450, 460), a restraint plate (410), and a restraint module return spring (440).

A key assembly receiving groove (611) may be formed on the front side of the front cover plate (610). A restraint plate (410) may be installed to be movable in a horizontal direction at a portion corresponding to the key assembly receiving groove (611) on the rear side of the front cover plate (610).

The key assembly receiving groove (611) can be opened forward. A key assembly hole can be formed on the bottom surface of the key assembly receiving groove (611). The key assembly (450, 460) can penetrate the key assembly hole and engage with the restraint plate (410), thereby moving the restraint plate (410) in a horizontal direction.

Accordingly, the air circuit breaker (1) according to one embodiment of the present invention can separate the key assembly (450, 460) without disassembling the cover plate from the transfer module (300), so that maintenance, repair, and replacement of the key assembly (450, 460) are easy, thereby immediately reflecting customer needs.

Additionally, the key assembly (450, 460) may be replaced with another actuating means for moving the restraint plate (410). For example, the key assembly (450, 460) may be replaced with an electronic device comprising an electronic interface operable by a user and a motor for moving the restraint plate (410). A specific description of the restraint plate (410) and the key assembly (450, 460) will be provided below.

A receiving groove cover member (620) that can cover a key assembly receiving groove (611) may be installed on the front cover plate (610). As a result, the key assembly (450, 460) received inside the key assembly receiving groove (611) may be protected from the outside, and arbitrary access to the key assembly by a third party may be blocked. Screw grooves for screw coupling may be provided on both sides of the receiving groove cover member (620) and the key assembly receiving groove (611), respectively.

Meanwhile, a handle insertion hole (613), a handle storage hole (615), etc. may be formed in the front cover plate (610). At this time, the handle insertion hole (613) may be formed at a position corresponding to the tool groove (331) of the insertion/withdrawal screw (330). Accordingly, the handle may be coupled to the tool groove (331) by passing through the handle insertion hole (613). In addition, the handle insertion hole (613) may be opened and closed by the horizontal movement of the shutter plate (510).

That is, referring again to FIGS. 4 and 6, when the shutter plate (510) is moved to the right, the handle insertion hole (613) may be partially closed by the handle insertion prevention portion (512). However, when the shutter plate (510) is moved to the left, the handle insertion hole (613) may be opened by being connected to the handle hole (511) of the shutter plate (510).

Figures 8 and 9 are perspective views of a key assembly and a restraint plate according to one embodiment of the present invention, respectively, viewed from different angles. Figure 10 is an exploded perspective view of the key assembly and restraint plate according to one embodiment of the present invention illustrated in Figure 8.

Referring to FIGS. 8 to 11, a restraint module (400) may be provided to simultaneously perform the function of preventing the insertion of the circuit breaker main body and the function of restricting the insertion and withdrawal of the circuit breaker main body.

A first key assembly (450) of a restraint module (400) may include a first rotating cylinder (452), a first key home (453), and a first key lever (454). The first rotating cylinder (452) may be rotated in one direction using a key inserted into the first key home (453).

A first key lever (454) that rotates together with the first rotary cylinder (452) can be coupled to the rear of the first rotary cylinder (452). The first key lever (454) can be bent toward the restraint plate (410). The first key lever (454) can be inserted into a first key lever hole (411a) formed in the restraint plate (410).

The first key lever (454) can rotate and pressurize a portion of the inner surface of the first key lever hole (411a). For example, when viewed from the front with reference to FIG. 10, if the first rotary cylinder (452) rotates counterclockwise, the first key lever (454) can pressurize the right inner surface of the first key lever hole (411a) to move the restraining plate (410) to the right.

Meanwhile, the second key assembly (460) may be formed in the same shape as the first key assembly (450). That is, the second key assembly (460) may be formed of a second rotating cylinder (462), a second key home (463), and a second key lever (464), and the second rotating cylinder (462), the second key home (463), and the second key lever (464) may be formed in the same shape as the first rotating cylinder (452), the first key home (453), and the first key lever (454), respectively.

At this time, the first key assembly (450) and the second key assembly (460) may be arranged in a horizontal direction in parallel. In addition, a second key lever hole (411b) into which a second key lever (464) may be inserted may be provided in the restraint plate (410). At this time, the lever holes (411a, 411b) may be formed along the movement direction (i.e., horizontal direction) of the restraint plate (410).

Referring to (c) of FIGS. 10 and 11, a restraint projection (420) may be formed to protrude at the lower right side of the restraint plate (410). When the interlock lever (700) is positioned at the first position, the restraint projection (420) may enter the lower part of the interlock lever (700) and perform the function of supporting the lower side of the interlock lever (700) in an upward direction.

Accordingly, in the air circuit breaker according to one embodiment of the present invention, even if the external force pressing the off button (222) is removed, the interlock lever (700) does not move downward, so that the circuit breaker main body (200) can be prevented from being opened.

Referring again to the enlarged view of FIG. 5 and FIG. 10, the restraint plate (410) may be installed horizontally movably at the rear of the front cover plate (610). A return spring groove (415) may be formed on the upper side of the lever hole (411a, 411b) in the restraint plate (410), into which a restraint module return spring (440) may be inserted. A spring installation portion (430) may be formed to protrude in the direction of movement (i.e., horizontal direction) of the restraint plate (410) on the inner surface of the return spring groove (415).

A restraint module return spring (440) may be installed in the spring installation portion (430). At this time, the restraint module return spring (440) may be a coil spring. A return spring support portion (617) may protrude toward the restraint plate (410) on the rear side of the front cover plate (610). The return spring support portion (617) may be inserted into one section of the return spring groove (415) of the restraint plate (410) to support one side of the restraint module return spring (440).

Accordingly, in a normal state where no external force is applied to the restraint plate (410), the restraint plate (410) may be moved to the right (away from the interlock lever (700)) based on Fig. 5. When the restraint plate (410) moves to the left (closer to the interlock lever (700)) based on Fig. 5 due to the application of an external force (for example, force by the key lever of the key assembly), elastic force may be stored in the restraint module return spring (440). When the external force is removed from the restraint plate (410), the restraint plate (410) may be moved to the right by the restoring force of the restraint module return spring (440).

Referring to the enlarged view of Fig. 5, a first guide protrusion (614) may be formed on the rear side of the front cover plate (610) along the direction of movement of the restraint plate (410) on the upper and lower sides of the restraint plate (410). The restraint plate (410) may be inserted into the inner side of the first guide protrusion (614) and may move while being guided by the first guide protrusion (614).

In addition, a second guide protrusion (616) protruding toward the restraint plate (410) may be formed on the front cover plate (610). A guide hole (413) may be formed on one side of the return spring groove (415) of the restraint plate (410) in the movement direction (i.e., horizontal direction) of the restraint plate (410). The second guide protrusion (616) may be inserted into the guide hole (413). Accordingly, as the restraint plate (410) moves, the second guide protrusion (616) may perform a sliding movement inside the guide hole (413).

Accordingly, the restraint plate (410) according to one embodiment of the present invention can be stably guided and moved by the first guide protrusion (614) and the second guide protrusion (616).

Meanwhile, a stopper (618) protruding toward the restraint plate (410) may be provided on the rear side of the front cover plate (610). The stopper (618) may be placed on the path along which the restraint plate (410) moves.

For example, based on the enlarged view of Fig. 5, there may be a plurality of stoppers (618), and they may be respectively positioned at the upper right and lower right of the restraint plate (410). The stoppers (618) may perform a function of preventing the restraint plate (410) from deviating from the set movement path.

Hereinafter, with reference to FIG. 11, the relative movement of the restraint plate (410), the interlock lever (700), and the shutter plate (510) will be described in more detail.

Referring to (a) of Fig. 11, in the state where the off button of the circuit breaker main body is not pressed, the interlock lever (700) can be moved downward and positioned in the second position. At this time, the shutter plate (510) cannot be moved to the left because the shutter projection (520) is caught by the lower part of the interlock lever (700). Accordingly, the handle insertion prevention portion of the shutter plate (510) can cover a part of the tool groove of the insertion/withdrawal screw, thereby restricting the insertion/withdrawal of the circuit breaker main body (200).

Referring to (b) of Fig. 11, when the off button of the circuit breaker main body is pressed, the interlock lever (700) can move upward and be positioned at the first position. At this time, the shutter protrusion (520) of the shutter plate (510) may not be caught by the interlock lever (700). In addition, the shutter plate (510) may not be caught by the restraining plate (410) located at the release position. Therefore, the shutter plate (510) can move to the left.

Accordingly, the shutter plate (510) can expose the tool groove of the insertion/extraction screw to the outside through the handle hole (511). Accordingly, the user can insert/extract the blocking body by engaging the handle with the tool groove of the screw.

Referring to (c) of Fig. 11, the restraint projection (420) of the restraint plate (410) can enter the lower side of the interlock lever (700) as the restraint plate (410) moves to the right. Hereinafter, the position of the restraint plate (410) shown in (c) of Fig. 11 is referred to as the restraint position.

The restraining projection (420) located at the restraining position can support the lower part of the interlock lever (700) to fix the interlock lever (700) in the first position. Accordingly, even if the external force pressing the off button disappears, the circuit breaker main body can be prevented from being closed.

In addition, the shutter projection (520) of the shutter plate (510) can be restricted from moving to the left by being caught by the restraining projection (420) of the restraining plate (410). As a result, the handle insertion prevention portion of the shutter plate (510) can partially cover the tool groove of the insertion/withdrawal screw, thereby restricting the insertion/withdrawal of the blocking body.

That is, the restraint module (400) of the air circuit breaker according to one embodiment of the present invention can simultaneously implement the function of restraining the closing operation and the withdrawal operation of the circuit breaker main body (200).

A key assembly according to one embodiment of the present invention can move a restraining plate to a restraining position and then fix the position. Accordingly, the restraining module of an air circuit breaker according to one embodiment of the present invention can maintain the state in which the closing operation and the insertion/withdrawal of the circuit breaker main body are restrained.

FIGS. 12 to 15 are drawings illustrating a state in which a key assembly and a restraint plate are viewed from the transfer module side toward the cover plate side according to one embodiment of the present invention, FIG. 12 is a drawing illustrating a state in which both the first and second key assemblies are in an unlocked state, FIG. 13 is a drawing illustrating a case in which the first key assembly is in a locked state and the second key assembly is in an unlocked state, FIG. 14 is a drawing illustrating a case in which the first key assembly is in an unlocked state and the second key assembly is in a locked state, and FIG. 15 is a drawing illustrating a case in which both the first and second key assemblies are in a locked state.

Referring to FIG. 12, the restraint module (400) is in a released state, and both the first key assembly (450) and the second key assembly (460) are in a released state. With reference to FIG. 12, both the first key lever (454) and the second key lever (464) are moved to the right, so that the restraint plate (410) can be moved to the right by the restoring force of the restraint module return spring (440) without being fixed in position by the key levers (454, 464). That is, the restraint plate (410) cannot restrict the movement of the interlock lever (700) and the movement of the shutter plate (510).

Referring to FIG. 13, the first key assembly (450) is in a locked state and the second key assembly (460) is in an unlocked state. With reference to FIG. 13, the second key lever (464) has moved to the right, but the first key lever (454) has moved to the left, so the restraining plate (410) is restricted from moving to the right by the first key lever (454). That is, the restraining plate (410) is fixed in a restraining position to restrict the movement of the interlock lever (700) and the movement of the shutter plate (510).

Referring to FIG. 14, the first key assembly (450) is in an unlocked state and the second key assembly (460) is in a locked state. With reference to FIG. 14, the first key lever (454) has moved to the right, but the second key lever (464) has moved to the left, so that the restraint plate (410) is restricted from moving to the right by the second key lever (464). That is, the restraint plate (410) is fixed in a restrained position to restrict the movement of the interlock lever (700) and the movement of the shutter plate (510).

Referring to FIG. 15, the restraint module (400) is in a released state, and both the first key assembly (450) and the second key assembly (460) are in a locked state. Based on FIG. 15, both the first key lever (454) and the second key lever (464) are moved to the left, so the restraint plate (410) is fixed in a restraint position by the key levers (454, 464) and cannot be moved to the right. That is, the restraint plate (410) can restrict the movement of the interlock lever and the movement of the shutter plate.

Except for the case where all key assemblies (450, 460) are released as shown in Fig. 12, when one or more key assemblies (450, 460) are in a locked state as shown in Figs. 13 to 15, the downward movement of the interlock lever is restricted, the off button remains pressed, thus preventing the insertion operation, and the movement of the shutter plate is restricted, thus preventing the insertion and withdrawal of the circuit breaker main body.

The first key assembly (450) and the second key assembly (460) can be combined and used in an appropriate manner and for an appropriate purpose. That is, the first key assembly (450) and the second key assembly (460) can be used independently as well as in parallel.

As described above, the air circuit breaker according to one embodiment of the present invention can simultaneously implement the function of restricting the closing operation and the insertion/withdrawal of the circuit breaker main body by positioning the restraining plate in the locked position to restrict the movement of the interlock lever and the shutter plate. Furthermore, the air circuit breaker according to one embodiment of the present invention can maintain the closing operation and the insertion/withdrawal of the circuit breaker main body in a restricted state by positioning and fixing the restraining plate in the locked position using an operating means.

In addition, an air circuit breaker according to one embodiment of the present invention arranges a restraint plate on the inner surface of a cover plate covering the outer surface of a transport module, and positions an operating means for moving the restraint plate on the outer surface, and an accommodation groove for accommodating the operating means is formed in the cover plate, so that the operating means can be easily separated without detaching the cover plate, thereby facilitating maintenance, repair, and replacement of the operating means, thereby immediately reflecting customer needs.

Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

1: Air circuit breaker 3: Housing
4: Handle 100: Cradle
110: Cradle body 111: Entry/exit
120: Cradle terminal 200: Circuit breaker main body
210: Central body 220: Opening mechanism
230: Sohobu 240: Main axis
300: Transfer module 310: Base plate
320: Top cover plate 330: Inlet/outlet screw
340: Positioning screw 400: Restraint module
410: Restraint plate 420: Restraint lug
430: Spring installation part 440: Restraint module return spring
450 460: Key assembly 500: Shutter module
510: Shutter plate 520: Shutter projection
530: Spring fixing part 540: Shutter module return spring
600: Front cover 610: Front cover plate
620: Receiving home cover absence 700: Interlock lever
710: Protrusion 720: Interlock lever return spring

Claims (16)

Cradle with one open end;
A circuit breaker main body that is inserted and removed from one side of the above cradle;
An interlock lever connected to a button of the above circuit breaker body and formed so as to be positioned at a first position when the button is pressed and at a second position when the button is not pressed;
A transport module provided in the above cradle for introducing and withdrawing the above circuit breaker body; and
A restraint module having a restraint plate movably installed in front of the transport module, the restraint plate fixing the interlock lever in the first position when in the locked position and allowing the interlock lever to move from the first position to the second position when in the unlocked position;
A cover plate covering the outer surface of the above transport module, wherein a hole is formed; and
A shutter plate positioned between the above transport module and the above cover plate and configured to open and close the hole of the above cover plate,
An air circuit breaker in which the above restraint module, when moved to the locking position, fixes the shutter plate in a position to close the hole of the cover plate, and when moved to the releasing position, allows the shutter plate to move to open and close the hole of the cover plate. delete In paragraph 1,
An air circuit breaker, wherein the restraint module comprises an operating means for moving the restraint plate. In the third paragraph,
An air circuit breaker, wherein a receiving groove for receiving the operating means is formed on the outer surface of the cover plate, and the restraining plate is arranged on the inner surface. In paragraph 4,
The above operating means is a key assembly, an air circuit breaker. In paragraph 5,
An air circuit breaker, wherein a key assembly hole through which the key assembly can penetrate is formed on the bottom surface of the above-mentioned receiving groove. In paragraph 1,
An air circuit breaker, wherein the cover plate has first guide projections formed on both sides of the restraint plate along the direction of movement of the restraint plate. In paragraph 1,
The above cover plate is formed with a second guide projection protruding toward the restraint plate,
An air circuit breaker, wherein the second guide projection is inserted into the restraint plate and a guide groove is formed extending along the direction of movement of the restraint plate. In paragraph 4,
An air circuit breaker, wherein a cover member covering the receiving groove is installed on the cover plate. In paragraph 1,
An air circuit breaker in which the direction of movement of the interlock lever and the direction of movement of the restraint plate are perpendicular to each other. In paragraph 1,
An air circuit breaker, wherein the restraint plate is provided with a spring installation section in which a return spring is installed to provide elastic force for returning the restraint plate to one position. In paragraph 1,
An air circuit breaker, wherein a restraining projection for restricting or allowing movement of the interlock lever is formed protruding toward the interlock lever on the restraining plate. In Article 12,
An air circuit breaker in which the above-mentioned restraint projection supports one side of the interlock lever from the second position toward the first position in the locked position. In paragraph 5,
The above key assembly is,
A rotary cylinder rotated by a key; and
An air circuit breaker comprising a key lever provided on one side of the rotating cylinder and rotating together with the rotating cylinder to pressurize and move the restraining plate. In Article 14,
The above key lever is formed to protrude toward the restraint plate,
An air circuit breaker, wherein a key lever hole is formed in the direction of movement of the restraint plate so that the key lever can be inserted and rotated. In paragraph 5,
The above key assembly is provided in pairs of two.
An air circuit breaker, wherein at least one of the pair of key assemblies is positioned at a specific position to secure the restraint plate in the locked position.

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