Plug-in circuit breaker

Abstract

The utility model relates to a plug-in circuit breaker, each pole of circuit breaker pole-dividing body comprises a shell, a moving contact assembly and a static contact assembly which are accommodated in the shell, and an operating handle installed on the shell, and the operating handle can drive the moving contact assembly and the static contact assembly to be contacted or separated; the plug-in circuit breaker further comprises a linkage assembly, and the linkage assembly comprises a plate body, a long shaft and at least one short shaft. The plate body is arranged on the sides, away from the shell, of the multiple operation handles, and at least one protruding rib is arranged on the side, facing the multiple operation handles, of the plate body and used for being inserted between every two adjacent operation handles. The long shaft and the at least one short shaft are longitudinally arranged, and the long shaft is inserted into all the convex ribs and all the operation handles; and at least one short shaft is correspondingly inserted into each convex rib and is connected between every two adjacent operating handles. According to the plug-in circuit breaker, the linkage assembly is arranged to drive all the operation handles to move synchronously, and rapid circuit breaking or circuit connection can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage circuit breaker field especially relates to plug -in circuit breaker. BACKGROUND

[0002] Circuit breaker is a kind of safe electrical equipment, mainly for the overload, short circuit and other electrical protection of electric appliance.Circuit breaker is mainly divided into high voltage circuit breaker and low voltage circuit breaker, wherein low voltage circuit breaker includes the plug-in circuit breaker that cable can be inserted, with small volume, easy connection and other advantages.

[0003] In the related art, the plug-in circuit breaker can include a multi-pole circuit breaker pole body, and the multi-pole circuit breaker pole body can be synchronously turned on and off by a transmission mode of driving a rotating shaft by a motor for remote operation. However, when the plug-in circuit breaker needs to be turned on and off on site, each pole circuit breaker pole body can only be turned on and off by manual operation one by one, and the plug-in circuit breaker cannot be turned on and off quickly. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem, and provides a kind of plug-in circuit breaker.

[0005] The utility model solves the technical problem and adopts the technical scheme: construct a kind of plug-in circuit breaker, including several pole circuit breaker pole body, each pole circuit breaker pole body includes shell, and the movable contact assembly and static contact assembly received in the shell, each circuit breaker pole body further includes the operating handle installed on the shell, one end of the operating handle is located in the shell, and is connected with the movable contact assembly, the other end of the operating handle is stretched out from the shell;The operating handle can be linearly reciprocatingly displaced along the length direction of the circuit breaker pole body to drive the contact or separation between the movable contact assembly and the static contact assembly;The plug-in circuit breaker further includes a linkage assembly, the linkage assembly includes a plate body, a long shaft and at least one short shaft;The plate body is arranged on the side of the operating handle away from the shell, and the plate body is provided with at least one rib on the side facing the operating handle, for inserting between every two adjacent operating handles;The long shaft and the at least one short shaft are arranged longitudinally, the long shaft is inserted into all the ribs and all the operating handles;The at least one short shaft is correspondingly inserted into each rib and connected between every two adjacent operating handles.

[0006] In some embodiments, one end of each operating handle stretched out from the shell is provided with a through hole for the long shaft to pass through, and two blind holes for the short shaft to insert;The length direction of the long shaft is parallel to the width direction of the circuit breaker pole body;The two blind holes are arranged on the opposite sides of the operating handle in the width direction of the circuit breaker pole body.

[0007] In some embodiments, each of the ribs is provided with two through holes arranged longitudinally and spaced apart, for inserting the long shaft and the short shaft.

[0008] In some embodiments, the through hole has a U-shaped hole with a U-shaped profile.

[0009] In some embodiments, the smaller end of the U-shaped hole is arranged away from the plate body.

[0010] In some embodiments, the long shaft is arranged below the at least one short shaft; the top of at least one of the ribs is provided with an opening, and the opening is in communication with the through hole on the upper side to form a channel.

[0011] In some embodiments, the plug-in circuit breaker comprises a four-pole circuit breaker pole body; the plate body comprises a middle rib arranged in the middle and two edge ribs arranged on the opposite sides of the middle rib; the top of the middle rib is provided with an opening, and the opening is in communication with the through hole on the upper side of the middle rib to form a channel.

[0012] In some embodiments, the housing is provided with a first side wall, the first side wall is provided with a first insertion hole for inserting a cable connected with the movable contact assembly; the operating handle is inserted on the first side wall and arranged longitudinally and spaced apart from the first insertion hole; a wire blocking rack is arranged between the first insertion hole and the operating handle.

[0013] In some embodiments, the movable contact assembly comprises a swing arm, one end of the swing arm close to the static contact of the static contact assembly is provided with a movable contact; the operating handle is arranged on the side of the swing arm away from the static contact, and at least one transmission arm is arranged between the operating handle and the swing arm.

[0014] In some embodiments, the operating handle comprises a trunk, and a head and a loop part connected with the trunk; the head is connected with the outer end of the trunk and arranged outside the housing; the loop part is connected with the inner end of the trunk for connecting the transmission arm; the loop part comprises a loop structure for forming a waist-shaped hole, and the length direction of the waist-shaped hole is the same as the linear displacement direction of the operating handle.

[0015] The implementation of the utility model has the following beneficial effects: the plug-in circuit breaker drives the operating handles of the various circuit breaker pole bodies to move synchronously through the setting of the linkage assembly, thereby realizing quick circuit breaking or passing, saving the operation time of on-site personnel for closing and opening, and improving the work efficiency.

[0016] Secondly, the design of the convex ribs inserted into the intervals between the operation handles can make the connection between the plate body and the operation handles more compact and stable, effectively reducing the excessive shaking between the components; and the design of the long and short shafts can not only ensure the connection strength between the operation handles, but also allow the adjacent two operation handles to be fine-tuned to a certain extent on the basis of ensuring the synchronization, so as to adapt to the possible slight differences between different operation handles. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described below in combination with the drawings and embodiments, wherein:

[0018] Figure 1 is the structure schematic diagram of the plug-in circuit breaker in some embodiments of the utility model; wherein, the letter L in the drawing represents the length direction of the circuit breaker pole body of the plug-in circuit breaker, and the letter W represents the width direction of the circuit breaker pole body;

[0019] Figure 2 is the internal structure schematic diagram of the circuit breaker pole body in some embodiments of the utility model;

[0020] Figure 3 is Figure 1 the structure exploded view of the plug-in circuit breaker shown in the drawing;

[0021] Figure 4 is the structure schematic diagram of the operation handle of the circuit breaker pole body in some embodiments of the utility model;

[0022] Figure 5 is the structure schematic diagram of the plate body of the linkage assembly in some embodiments of the utility model.

[0023] Reference signs:

[0024] Circuit breaker pole body 100;Control mechanism 200;Rotating main shaft 300;

[0025] Housing 11;First jack 111;Second jack 112;Wire stopper 113;Moving contact assembly 2;Swing arm 21;Moving contact 22;Static contact assembly 3;Transmission arm 4;First transmission arm 4a;Second transmission arm 4b;Rotating part 5;Operation handle 6;Trunk 61;Head 62;Through hole 621;Blind hole 622;Loop buckle 63;Linkage assembly 7;Plate body 71;Convex rib 72;Middle convex rib 72a;Edge convex rib 72b;Mounting hole 721;Opening 722;Long shaft 73;Short shaft 74. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, objectives and effects of the utility model, the specific implementation mode of the utility model will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or position relations indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or position relations shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical scheme, and do not indicate that the indicated device or element must have a particular direction, so it cannot be understood as a limitation on the utility model.

[0027] It should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or one or more intermediate elements can exist. The terms "first", "second", "third" and the like are only for the convenience of describing the technical scheme, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, so the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more features. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] In the following description, specific details are presented, such as specific system structures, technologies, etc., for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the utility model. However, it should be clear to those skilled in the art that the utility model can also be implemented in other embodiments without these specific details. In other cases, detailed description of well-known systems, devices, circuits and methods is omitted to avoid unnecessary details that hinder the description of the utility model.

[0029] Please refer to Figures 1-3 The utility model constructs a plug-in circuit breaker, which can be applied in network communication cabinet, such as for 5G communication cabinet.

[0030] The plug-in circuit breaker mainly comprises a plurality of pole circuit breaker pole bodies 100, a rotating main shaft 300 and a control mechanism 200. Each pole circuit breaker pole body 100 is connected with a corresponding load and power supply device respectively, and the pole circuit breaker pole bodies 100 are arranged along their width direction. The rotating main shaft 300 connects the pole circuit breaker pole bodies 100 in series, and drives the rotating main shaft 300 through the control mechanism 200 to control the pole circuit breaker pole bodies 100 to complete the closing and opening actions in a mechanical linkage manner.

[0031] In some embodiments, reference can be made to Figure 2 Each pole circuit breaker pole body 100 comprises a housing 11, a movable contact assembly 2 and a stationary contact assembly 3 accommodated in the housing 11. The movable contact assembly 2 is connected with the rotating main shaft 300, and a part of the movable contact assembly 2 is driven by the rotating main shaft 300 to contact or separate from the stationary contact assembly 3, so as to realize the closing and opening.

[0032] As shown in Figure 2 The housing 11 is provided with two insertion holes, i.e. a first insertion hole 111 and a second insertion hole 112. The first insertion hole 111 is used for inserting the cable connected with the power supply device, so that the cable connected with the power supply device is in conductive connection with the movable contact assembly 2. The second insertion hole 112 is used for inserting the cable connected with the load, so that the cable connected with the load is in conductive connection with the stationary contact assembly 3. In the embodiment, the first insertion hole 111 and the second insertion hole 112 are arranged at opposite ends of the housing 11 in the length direction.

[0033] The stationary contact assembly 3 is fixed in the housing 11. The movable contact assembly 2 comprises a swing arm 21 provided with a movable contact 22 at one end close to the stationary contact of the stationary contact assembly 3.

[0034] The rotating main shaft 300 is inserted into the housing 11 along the width direction of the pole circuit breaker pole body 100. Under the driving of the control mechanism 200, the rotating main shaft 300 can rotate. Meanwhile, the rotating main shaft 300 is connected with the swing arm 21, and the swing arm 21 is driven by the rotating main shaft 300 to rotate. According to the rotating direction of the swing arm 21, the movable contact 22 can contact or separate from the stationary contact of the stationary contact assembly 3.

[0035] Continuing to refer to Figure 2 The pole circuit breaker pole body 100 further comprises an operating handle 6 mounted on the housing 11. The operating handle 6 is arranged at a side of the rotating main shaft 300 away from the movable contact 22, and is connected with the movable contact assembly 2, so as to drive the movable contact 22 to contact or separate from the stationary contact.

[0036] A portion of the structure of the operating handle 6 extends out of the housing 11, and at least one transmission arm 4 is provided between the operating handle 6 and the swing arm 21. Under the action of human or mechanical means, the operating handle 6 can move back and forth in a straight line, and under the transmission of the transmission arm 4, the swing arm 21 of the moving contact assembly 2 can rotate.

[0037] In addition, continue to refer to Figure 2 The circuit breaker branch body 100 may also include a rotating member 5 for driving the moving contact assembly 2 to rotate the swing arm 21. It should be noted here that the rotating member 5 is not a necessary component for the rotation of the swing arm 21. In other embodiments, the swing arm 21 can be rotated by inserting a rotating spindle 300 into the swing arm 21.

[0038] The rotating component 5 has a square mounting hole for the square shaft-shaped rotating main shaft 300 to pass through. Simultaneously, two transmission arms 4 are arranged between the operating handle 6 and the swing arm 21; these two transmission arms 4 will be referred to as the first transmission arm 4a and the second transmission arm 4b. The first transmission arm 4a is located between the rotating component 5 and the swing arm 21, and the second transmission arm 4b is located between the rotating component 5 and the operating handle 6. When the rotating main shaft 300 is inserted into the mounting hole, it can drive the rotating component 5 to rotate, and under the transmission of the first transmission arm 4a, the swing arm 21 of the moving contact assembly 2 can rotate accordingly. The operating handle 6 is configured to drive the rotating component 5 to rotate via the transmission of the second transmission arm 4b when displaced, thereby driving the swing arm 21 to rotate.

[0039] Here Figure 2 Using the angles shown as examples, when the main shaft 300 rotates counterclockwise, the rotating component 5 also rotates counterclockwise. Under the transmission of the first transmission arm 4a, the end of the swing arm 21 connected to the first transmission arm 4a moves downward, while the end of the swing arm 21 with the moving contact 22 lifts upward, thus separating the moving contact 22 from the stationary contact. Similarly, when the main shaft 300 rotates clockwise, the rotating component 5 also rotates clockwise. Under the transmission of the first transmission arm 4a, the end of the swing arm 21 connected to the first transmission arm 4a lifts upward, while the end of the swing arm 21 with the moving contact 22 moves downward, thus bringing the moving contact 22 into contact with the stationary contact. When the operating handle 6 moves outward, under the transmission of the second transmission arm 4b, the main shaft 300 and the rotating component 5 rotate counterclockwise, thus separating the moving contact 22 from the stationary contact. Similarly, when the operating handle 6 moves inward, under the transmission of the second transmission arm 4b, the rotating main shaft 300 and the rotating component 5 rotate clockwise, thereby realizing the contact between the moving contact 22 and the stationary contact.

[0040] It can be understood that the circuit breaker pole body 100 of the plug-in circuit breaker can be realized by two ways, one is realized by driving the rotating shaft 300 to rotate through the control mechanism 200, and the other is realized by rotating the rotating member 5 through the operation handle 6. In the embodiment, the control mechanism 200 is arranged in communication connection with the remote terminal, then the remote terminal can realize remote control of the on-off of the circuit breaker pole body 100 by sending instructions to command the control mechanism 200 to operate. The operation handle 6 is arranged to be manually controlled, and the on-off of the circuit breaker pole body 100 can be controlled by the site personnel by pushing and pulling the operation handle 6.

[0041] Looking back at the operation handle 6, in some embodiments, it can be referred to Figure 3 , the operation handle 6 can be inserted on the side wall of the shell 11 provided with the first through hole 621 (hereinafter referred to as the first side wall), and linear reciprocating displacement is performed at the first side wall. In the embodiment, the first insertion hole 111 is located above the operation handle 6.

[0042] Preferably, as Figure 3 indicated, a wire blocking frame 113 can be arranged between the first insertion hole 111 and the operation handle 6 to prevent the operation handle 6 from contacting the cable inserted into the first insertion hole 111, protect the cable from interfering with the board body 71 during on-off, thereby reducing the risk of electric shock of personnel, and also ensuring that the entire circuit system can normally and safely operate. In the embodiment, the wire blocking frame 113 can have a U-shaped structure, and the two ends of the wire blocking frame 113 are respectively fixed to the wall surface of the first side wall between the first insertion hole 111 and the operation handle 6.

[0043] It can be combined with Figure 2 , Figure 4 for reference, the operation handle 6 can include a trunk 61, a head 62 connected to the trunk 61, and a loop 63. The head 62 can be connected to the outer end of the trunk 61 and arranged outside the shell 11 to provide a basis for manually controlling the operation handle 6. The loop 63 can be connected to the inner end of the trunk 61, and the end of the transmission arm 4 is connected to the loop 63, thereby driving the operation handle 6 to displace.

[0044] As shown in Figure 2 , the loop 63 can include a ring structure for forming a waist-shaped hole, and the length direction of the waist-shaped hole is the same as the linear displacement direction of the operation handle 6. The end of the transmission arm 4 is arranged in the waist-shaped hole and is realized by the action of the hole wall of the waist-shaped hole. The position of the end of the transmission arm 4 in the waist-shaped hole can change with the movement of the operation handle 6.

[0045] In some embodiments, it can be referred to Figure 3The plug-in circuit breaker further comprises a linkage assembly 7 connected to the operating handles 6 of each circuit breaker pole body 100, which is used to drive the operating handles 6 of each circuit breaker pole body 100 to move synchronously, so as to realize quick switching on or off, save the operation time of on-site personnel, improve the work efficiency, especially in the case of emergency shutdown or switching on of the circuit. Moreover, the operation can be more labor-saving, because the force can be evenly distributed on each operating handle 6, and the force exertion is more natural and smooth.

[0046] There is a gap between each two adjacent operating handles 6 of the circuit breaker pole body 100. In combination with Figure 3 , Figure 5 It can be seen that the linkage assembly 7 can comprise an elongated plate body 71, the length of which is greater than or equal to the overall width of all operating handles 6; at least one protruding rib 72 is arranged on one side of the plate body 71, which is inserted between each two adjacent operating handles 6 of the circuit breaker pole body 100. It can be understood that when the circuit breaker pole body 100 is provided with two, the protruding rib 72 is provided with only one, which is inserted into the gap between the operating handles 6 of the two circuit breaker pole bodies 100; and when the circuit breaker pole body 100 is provided with more than three, the protruding rib 72 is provided with a plurality of protruding ribs, which are inserted into the gap between each two adjacent operating handles 6 of the circuit breaker pole body 100.

[0047] The design of inserting the protruding rib 72 of the plate body 71 into the gap between each operating handle 6 can make the connection between the plate body 71 and the operating handle 6 more closely and stably, thereby enhancing the integrity of the entire circuit breaker pole body 100. When the plug-in circuit breaker is closed or opened, such close connection can effectively reduce the relative shaking between each component, so that the operation process is more stable and reliable.

[0048] It can be seen that Figure 3 The linkage assembly 7 further comprises a long shaft 73 and at least one short shaft 74 arranged between each two adjacent operating handles 6. The long shaft 73 is used to connect all the protruding ribs 72 and the operating handles 6 in series, the long shaft 73 can be arranged in all the protruding ribs 72 and the operating handles 6, and can be fixedly connected with the operating handles 6 by bonding, screwing or the like. Each short shaft 74 is correspondingly arranged on a single protruding rib 72 and connected with the corresponding adjacent two operating handles 6; since the long shaft 73 is fixedly connected with each operating handle 6, the short shaft 74 can be selected to be inserted into the operating handle 6, instead of being fixedly connected with the operating handle 6.

[0049] It can be understood that the long shaft 73 can ensure the relative position of each operating handle 6 on the same axis. The short shaft 74 can ensure the connection strength between the adjacent two operating handles 6, and allow the adjacent two operating handles 6 to be adjusted to a certain extent on the basis of ensuring synchronization, so as to adapt to the possible small differences between different operating handles 6. The differences described here can be caused by the installation position offset of the operating handle 6 and / or the plate body 71, or can be caused by the structural size deviation of the operating handle 6 and / or the plate body 71, which is not limited here.

[0050] Secondly, by setting the long shaft 73 and the short shaft 74, in the case of frequent operation of the plug-in circuit breaker or external vibration and impact force, the displacement or loosening between the operating handles 6 can be effectively prevented, the structural stability of each circuit breaker pole body 100 is ensured, and the consistency of all circuit breaker pole bodies 100 is also ensured.

[0051] Referring to Figure 4 Each operating handle 6 is provided with a through hole 621 for the long shaft 73 to pass through, and two blind holes 622 located on the opposite sides of the operating handle 6 for the short shaft 74 to insert. The through hole 621 and the blind hole 622 can be arranged on the head 62 of the operating handle 6, and the two are longitudinally spaced apart, wherein the through hole 621 can be formed through the head 62 of the operating handle 6 along the width direction of the circuit breaker pole body 100, and the two blind holes 622 can be arranged on the opposite sides of the head 62 of the operating handle 6 in the width direction of the circuit breaker pole body 100. It can be supplemented here that theoretically, the operating handle 6 of the first and last circuit breaker pole body 100 only needs to be provided with one blind hole 622, but in order to be universal, each operating handle 6 can be designed to have one through hole 621 and two blind holes 622. The design of the through hole 621 and the blind hole 622 can make the installation have a clear direction, and the on-site personnel can know the installation method according to the type of the hole, which is convenient for operation and simple to install.

[0052] Referring to Figure 5 Each rib 72 is provided with two longitudinally spaced apart mounting holes 721 to provide a basis for the installation of the long shaft 73 and the short shaft 74. The mounting hole 721 can be formed through the rib 72 along the width direction of the circuit breaker pole body 100.

[0053] The orifice shape of the mounting hole 721 can be circular, rectangular, elliptical, or other shapes. More preferably, the orifice shape of the mounting hole 721 can be a U-shaped hole with a U-shaped profile; the smaller end of the U-shaped hole can be located away from the plate 71. Understandably, compared with a conventional circular hole, a U-shaped hole has more space in one direction, which allows the shaft to enter the mounting hole 721 more easily within a certain angle range, reducing the alignment requirements between the shaft and the hole during installation, thereby improving the convenience and efficiency of installation. Moreover, when the force generated during operation is transmitted to the mounting hole 721 through the shaft, the U-shaped hole design can make the stress distribution more uniform, effectively reducing stress concentration in local areas and lowering the risk of fatigue damage to the hole wall of the mounting hole 721 due to stress concentration.

[0054] Secondly, among all the ribs, at least one rib 72 has an opening 722 at its top, and the opening 722 communicates with the mounting hole 721 located on the upper side to form a channel.

[0055] In this embodiment, reference can be made to Figure 3 The plug-in circuit breaker has a four-pole circuit breaker branch body 100, and four operating handles 6. Correspondingly, there are three protruding ribs 72 on the plate 71, namely the central protruding rib 72a located in the middle, and two side protruding ribs 72b located on both sides opposite to the central protruding rib 72a.

[0056] The short shaft 74 is positioned above the long shaft 73. Correspondingly, the blind hole 622 on the operating handle 6 is positioned above the through hole 621. The upper mounting holes 721 at the edge rib 72b and the middle rib 72a are for inserting the short shaft 74, while the lower mounting holes 721 are for the long shaft 73 to pass through.

[0057] The upper and lower mounting holes 721 of the edge rib 72b and the lower mounting hole 721 of the middle rib 72a are all U-shaped holes. The top of the middle rib 72a has an opening 722, which communicates with the mounting hole 721 on the upper side of the middle rib 72a to form a channel. Understandably, the design of the opening 722 increases the diameter of the mounting hole 721, improving installation tolerance; even if the initial position of the shaft and the hole deviates slightly, the opening 722 allows for this deviation. At the same time, the shaft has ample room to move within the channel, increasing the flexibility of installation operations and accommodating different installation angles. In actual installation, this design reduces the difficulty caused by installation errors and appropriately lowers the skill requirements for on-site personnel.

[0058] It is to be supplemented that the technical problem to be solved by the utility model is that the plug-in circuit breaker of the related art needs to be turned on and off on site, and only the poles of the circuit breaker pole body can be turned on and off one by one by manual operation, so that the operation of being turned on and off quickly cannot be completed, therefore, the utility model focuses on the operating handle 6 and the linkage assembly 7, and the specific structure of the moving contact assembly 2 and the static contact assembly 3 can be referred to the related art, and will not be described in detail here. In addition, in order to ensure the normal operation of the circuit breaker pole body 100, the circuit breaker pole body 100 can further include the structure of an arc extinguishing assembly and the like, and the specific structure can be referred to the related art, and will not be described in detail here. Similarly, the control mechanism 200 includes a control circuit board and a driving assembly, the driving motor is controlled to operate by the control circuit board, the rotating main shaft 300 is driven to rotate, and then the several pole circuit breaker pole bodies 100 are controlled to perform the closing action and the opening action; and the specific structure of the control circuit board and the driving assembly can be referred to the related art, and will not be described in detail here.

[0059] It can be understood that the above embodiments only express the preferred embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope; it should be pointed out that the above technical features can be freely combined without departing from the concept of the utility model, and a plurality of modifications and improvements can be made, which all belong to the protection scope of the utility model; therefore, all equivalent transformations and modifications within the scope of the utility model claims should belong to the coverage of the utility model claims.

Claims

1. An insertion circuit breaker comprising a plurality of pole circuit breaker poles (100), each pole circuit breaker pole (100) comprising a housing (11), and a moving contact assembly (2) and a stationary contact assembly (3) accommodated in the housing (11), characterized in that, each circuit breaker pole (100) further comprises an operating handle (6) mounted on the housing (11), one end of the operating handle (6) being arranged in the housing (11) and connected to the moving contact assembly (2), the other end of the operating handle (6) extending out of the housing (11); the operating handle (6) is arranged to be linearly reciprocated along the length direction of the circuit breaker pole (100) to drive the moving contact assembly (2) and the stationary contact assembly (3) to contact or separate; the insertion circuit breaker further comprises a linkage assembly (7) comprising a plate body (71), a long shaft (73) and at least one short shaft (74); the plate body (71) is arranged on the side of the plurality of operating handles (6) away from the housing (11), and at least one protrusion (72) is arranged on the side of the plate body (71) facing the plurality of operating handles (6) for being inserted between every two adjacent operating handles (6); the long shaft (73) and the at least one short shaft (74) are arranged longitudinally, the long shaft (73) is inserted into all the protrusions (72) and all the operating handles (6); the at least one short shaft (74) is correspondingly inserted into each protrusion (72) and connected between every two adjacent operating handles (6).

2. Plug-in circuit breaker according to claim 1, characterized in that each operating handle (6) has a through hole (621) for the long shaft (73) to pass through and two blind holes (622) for the short shaft (74) to be inserted on the end extending out of the housing (11); the length direction of the long shaft (73) is parallel to the width direction of the circuit breaker pole (100); the two blind holes (622) are arranged on opposite sides of the operating handle (6) in the width direction of the circuit breaker pole (100).

3. Plug-in circuit breaker according to claim 1 or 2, characterized in that each protrusion (72) has two mounting holes (721) arranged longitudinally to allow the long shaft (73) and the short shaft (74) to be inserted.

4. Plug-in circuit breaker according to claim 3, characterized in that The shape of the mounting hole (721) includes a U-shaped hole with a U-shaped profile.

5. Plug-in circuit breaker according to claim 4, characterized in that The smaller end of the U-shaped hole is arranged away from the plate body (71).

6. The plug-in circuit breaker of claim 3, wherein, The long shaft (73) is arranged below the at least one short shaft (74); The top of at least one protrusion (72) is provided with an opening (722) which is in communication with the mounting hole (721) on the upper side to form a channel.

7. Plug-in circuit breaker according to claim 6, characterized in that The insertion circuit breaker comprises four-pole circuit breaker poles (100). The plate body (71) comprises a middle rib (72a) in the middle and two edge ribs (72b) on the opposite sides of the middle rib (72a); the top of the middle rib (72a) is provided with an opening (722) which is communicated with the mounting hole (721) in the upper side of the middle rib (72a).

8. The plug-in circuit breaker of claim 1, wherein, The shell (11) is provided with a first side wall, and the first side wall is provided with a first insertion hole (111) for inserting a cable connected with the movable contact assembly (2); The operation handle (6) is inserted into the first side wall and arranged longitudinally spaced apart from the first insertion hole (111); a wire blocking frame (113) is arranged between the first insertion hole (111) and the operation handle (6).

9. The plug-in circuit breaker of claim 1, wherein, The movable contact assembly (2) comprises a swing arm (21), and one end of the swing arm (21) close to the static contact of the static contact assembly (3) is provided with a movable contact (22); The operation handle (6) is arranged on the side of the swing arm (21) away from the static contact, and at least one transmission arm (4) is arranged between the operation handle (6) and the swing arm (21).

10. The plug-in circuit breaker of claim 9, wherein, The operation handle (6) comprises a trunk (61), a head (62) and a loop (63) connected with the trunk (61); the head (62) is connected with the outer end of the trunk (61) and arranged outside the shell (11); The loop (63) is connected with the inner end of the trunk (61) to connect the transmission arm (4); the loop (63) comprises a ring structure for forming a waist-shaped hole, and the length direction of the waist-shaped hole is the same as the linear displacement direction of the operation handle (6).

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