A buckle structure and circuit breaker

Abstract

The application discloses a buckle structure and a plug-in circuit breaker. The buckle structure comprises a button, a sliding piece, a buckle and a shell. The buckle is rotationally arranged in the shell and is provided with a flange capable of extending out of the shell. The sliding piece is slidingly arranged in the shell and is connected with the buckle in linkage. The button is movably arranged in the shell and is connected with the sliding piece in linkage. The button can drive the buckle to rotate to make the flange extend out of or retract into the shell through the sliding piece. The button has a first position and a second position. When the button is in the second position, the button blocks the rotation of the buckle. When the circuit breaker is inserted into the cabinet, the flange automatically retracts and automatically pops out to lock after being in place, realizing plug-and-lock. When being pulled out, the button needs to be pulled to make the flange retract, and then the circuit breaker can be pulled out, so that the circuit breaker can be pulled out after being opened. When being closed, the button blocks the rotation of the buckle, so that the flange cannot retract, and the circuit breaker cannot be inserted into the cabinet. The application realizes double safety protection functions, effectively avoids the risk of electric shock caused by live insertion and removal, and has compact structure and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, specifically to a snap-fit ​​structure and a circuit breaker. Background Technology

[0002] Circuit breakers can be classified into plug-in type, fixed type, and drawer type according to their installation method. Among them, plug-in type circuit breakers are widely used in various electrical equipment due to their advantages such as convenient installation and maintenance. For example, the 1U terminal circuit breaker used in 5G communication equipment adopts the plug-in installation method, and the circuit breaker can be easily inserted into or removed from the circuit by plugging and unplugging.

[0003] During the use of plug-in circuit breakers, operators need to frequently insert and remove the circuit breaker. After the circuit breaker is inserted into the chassis, a reliable locking mechanism is required to secure it in the chassis to prevent accidental loosening due to vibration or other factors; at the same time, the locking mechanism should be easily released when it needs to be removed.

[0004] Existing technologies include some snap-locking structures for plug-in circuit breakers, but most of these structures can only provide one-way protection. That is, they can either prevent insertion into the chassis when the circuit is closed or allow the circuit breaker to be pulled out when it is open. It is difficult to achieve the dual safety protection logic of "can only be pulled out after opening" and "cannot be inserted when closing" through a simple linkage device. Operators still face the risk of misoperation when the circuit breaker is energized. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide a snap-fit ​​structure and circuit breaker that achieves dual safety protection functions with a simple structure through the linkage mechanism of button, slider and snap-fit, effectively avoiding the risk of electric shock caused by operators plugging and unplugging the circuit breaker while it is energized.

[0006] The objective of this invention is achieved through the following technical solution: A snap-fit ​​structure for a plug-in circuit breaker includes a button, a slider, a snap-fit, and a housing. The snap-fit ​​is rotatably disposed within the housing and has a flange that can extend out of the housing. The slider is slidably disposed within the housing and can slide along a first direction, and the slider is linked to the snap-fit. The button is movably disposed within the housing and can reciprocate along a second direction, and the button is linked to the slider. The button can drive the snap-fit ​​to rotate via the slider, causing the flange to extend out of or retract into the housing. The button has a first position and a second position; when the button is in the second position, the button blocks the snap-fit ​​from rotating.

[0007] In this technical solution, the button forms a complete linkage mechanism with a sliding component and a latch. When the button is in the first position (the initial extended position in the open state), the operator can pull the button, which will cause the latch to rotate via the sliding component, retracting the flange into the housing and unlocking the button. When the button is in the second position (the retracted position in the closed state), the button itself blocks the latch from rotating, preventing the flange from retracting into the housing and preventing the circuit breaker from being inserted into the chassis. This achieves dual safety protection with a simple structure.

[0008] Furthermore, the first direction is perpendicular to the second direction. By setting the reciprocating motion direction of the button (i.e., the second direction) and the sliding direction of the slider (i.e., the first direction) to be perpendicular to each other, the entire linkage mechanism is made more compact in spatial layout, which is beneficial to the miniaturization design of the circuit breaker.

[0009] Furthermore, the button is provided with a first boss, and the slider is provided with an inclined surface. The first boss and the inclined surface cooperate to convert the movement of the button in the second direction into the sliding of the slider in the first direction. Through the inclined surface cooperation between the first boss and the inclined surface, reliable conversion between movements in two vertical directions is achieved, resulting in a simple structure and high transmission efficiency.

[0010] Furthermore, the slider is also provided with a square hole, which extends continuously from the inclined surface. The square hole allows the first protrusion to enter the square hole when the button is pressed to the second position, providing clearance for the slider to slide and ensuring that the button remains in the retracted position without interfering with the slider when the switch is closed.

[0011] Furthermore, the sliding member is provided with a second boss, and the buckle is provided with a through hole. The second boss passes through the through hole, and the sliding of the sliding member drives the buckle to rotate through the cooperation of the second boss and the through hole. By cooperating with the through hole, the linear sliding of the sliding member is converted into the rotation of the buckle, and the transmission structure is simple and reliable.

[0012] Furthermore, the flange has an inlet ramp on the side facing the insertion direction and a stop ramp on the side facing the withdrawal direction. The inlet ramp allows the flange to abut against the chassis wall and automatically retract into the housing when the circuit breaker is inserted into the chassis, allowing insertion to be completed without the need for an operation button; the stop ramp ensures that the flange is hooked by the chassis square groove and cannot be pulled out when the button is not pulled out, thus realizing the safety logic of plug-and-lock, requiring unlocking before removal.

[0013] Furthermore, it also includes an elastic element disposed between the sliding member and the housing, which provides a restoring force to the sliding member. The elastic element ensures that, in the absence of external force, the sliding member drives the latch to keep the flange in a locked state extending out of the housing, achieving reliable locking under normal conditions.

[0014] Furthermore, the latching structure has a locked state and an unlocked state; in the locked state, the flange extends out of the housing for locking with the chassis; in the unlocked state, the flange retracts into the housing.

[0015] Furthermore, when the circuit breaker is in the open state, pulling the button can switch the latch structure from the locked state to the unlocked state; when the circuit breaker is in the closed state, the button is in the second position, and the latch is blocked by the button and cannot rotate to the unlocked state.

[0016] The present invention also provides a plug-in circuit breaker, including a circuit breaker body and a snap-fit ​​structure as described above, wherein the snap-fit ​​structure is disposed on the circuit breaker body.

[0017] The beneficial effects of this invention are as follows: This invention achieves dual safety protection functions of "can only be pulled out after the circuit breaker is opened" and "cannot be inserted when the circuit breaker is closed" through a linkage mechanism of buttons, sliders and buckles. From a mechanical structure perspective, it forcibly avoids the risk of electric shock caused by operators accidentally plugging or unplugging the circuit breaker while it is energized.

[0018] The present invention has a simple and compact structure with few parts. All functions can be achieved through only five core components: buttons, sliders, buckles, housings, and elastic elements. It has low manufacturing costs, is easy to assemble, and is conducive to the miniaturization design of circuit breakers.

[0019] This invention is easy to operate. When the circuit breaker is inserted into the chassis, it will automatically lock without the need to operate a button. When it is pulled out, it can be unlocked simply by pulling the button. It is intuitive to operate and provides a good user experience.

[0020] This invention utilizes an inclined guide surface design with the flange facing the insertion direction to achieve automatic clearance during circuit breaker insertion and automatic locking after insertion. It is plug-and-lock, requiring no additional operation and resulting in high installation efficiency.

[0021] This invention is highly versatile and can be widely applied to various plug-in circuit breakers, especially 1U terminal circuit breakers used in 5G communication equipment, and has good prospects for industrial application. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the snap-fit ​​structure described in the present invention in the open state; Figure 2 This is a schematic diagram of the buckle structure of the present invention in the pulled-out state; Figure 3 This is a schematic diagram of the snap-fit ​​structure described in the present invention in the closed state; Figure 4This is a schematic diagram showing the connection between the button and the slider described in this invention.

[0023] Figure 5 This is a schematic diagram showing the connection between the sliding member and the buckle according to the present invention.

[0024] As shown in the figure: 1-button, 11-first boss, 2-slider, 21-sloping surface, 22-square hole, 23-second boss, 3-buckle, 31-flange, 311-guide slope, 32-through hole, 4-housing, 5-elastic element. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0028] like Figures 1 to 5 As shown, this embodiment provides a snap-fit ​​structure for a plug-in circuit breaker, including a button 1, a slider 2, a snap-fit ​​3, and a housing 4.

[0029] The buckle 3 is rotatably disposed inside the housing 4, that is, one end of the buckle 3 is rotatably installed inside the housing 4 via a rotating shaft, and the other end of the buckle 3 is provided with a flange 31 that can extend out of the housing 4 (e.g., Figure 1 As shown, flange 31 extends from a pre-set hole at the bottom of housing 4. Flange 31 faces the side in the insertion direction. Figure 1 The left side (as shown) has an inlet ramp 311, facing the pull-out direction ( Figure 1 The right side shown is provided with a stop surface. The guide slope 311 is used to abut against the chassis wall when the circuit breaker is inserted into the chassis and generate a component force that causes the latch 3 to rotate into the housing 4; the stop surface is used to form a rigid abutment with the side wall of the chassis square groove when the circuit breaker is in the locked state, preventing the latch 3 from rotating into the housing 4.

[0030] The sliding member 2 is slidably disposed within the housing 4 and can slide along a first direction, which is the sliding direction of the sliding member 2. Figure 1 (The vertical movement direction is shown). The sliding member 2 is linked to the latch 3. Specifically, as shown... Figure 5 As shown, the sliding member 2 has a second protrusion 23, and the buckle 3 has a through hole 32. The second protrusion 23 passes through the through hole 32. The sliding of the sliding member 2 drives the buckle 3 to rotate through the cooperation of the second protrusion 23 and the through hole 32. When the sliding member 2 slides in the first direction toward the buckle 3 (sliding downward), the second protrusion 23 slides in the through hole 32 and pushes against the hole wall of the through hole 32, driving the buckle 3 to rotate toward the flange 31 extending out of the housing 4. When the sliding member 2 slides in the first direction away from the buckle 3 (sliding upward), the second protrusion 23 slides in the opposite direction in the through hole 32 and pushes against the other side of the hole wall of the through hole 32, driving the buckle 3 to rotate toward the flange 31 retracting into the housing 4. Preferably, the through hole 32 is an oblong hole, and its length direction is set along the rotation direction of the buckle 3, so that the second protrusion 23 has sufficient room for movement in the through hole 32, ensuring the smoothness and reliability of the movement conversion.

[0031] like Figure 1-3 As shown, the button 1 is movably disposed within the housing 4 and can reciprocate along the second direction, which is the reciprocating direction of the button 1. Figure 1 (As shown in the horizontal or left-right direction). Button 1 is linked to slider 2. Specifically, as... Figure 4As shown, button 1 has a first protrusion 11, and slider 2 has an inclined surface 21. The first protrusion 11 and the inclined surface 21 cooperate to convert the movement of button 1 in the second direction (left and right movement) into the sliding of slider 2 in the first direction (up and down movement). When the operator pulls button 1 to move it outward in the second direction (right movement), the first protrusion 11 slides along the inclined surface 21, pushing slider 2 to slide away from buckle 3 in the first direction (upward sliding), thereby causing buckle 3 to rotate and retract flange 31 into housing 4. When the operator presses button 1 to move it inward in the second direction (left movement), the first protrusion 11 slides in the opposite direction along the inclined surface 21, causing slider 2 to slide towards buckle 3 in the first direction (downward sliding), thereby causing buckle 3 to rotate and extend flange 31 out of housing 4.

[0032] like Figure 4 As shown, the sliding member 2 is also provided with a square hole 22, which extends continuously with the inclined surface 21. Preferably, the square hole 22 has an L-shaped structure, with one section (horizontal section) arranged along the second direction and the other section (vertical section) arranged along the first direction. The section of the square hole 22 arranged along the first direction (vertical section) extends towards the direction in which the flange 31 of the buckle 3 extends out of the housing 4. The inclined surface 21 is located at the corner connection between the horizontal section (the section arranged along the second direction) and the vertical section (the section arranged along the first direction) of the L-shaped square hole 22, specifically, the corner connection faces towards Figure 5 The inner inclined surface on the upper right side of the square hole 22 is used to guide the first protrusion 11 from the horizontal section into the vertical section. When the button 1 is pressed to the second position (closed state), the first protrusion 11 on the button 1 is located in the horizontal section of the square hole 22, keeping the button 1 in the retracted position; when the button 1 is pulled out, the first protrusion 11 slides along the inclined surface 21 into the vertical section of the square hole 22, providing clearance space for the sliding member 2 to slide.

[0033] The latching structure also includes an elastic element 5, which is disposed between the sliding member 2 and the housing 4, and is used to provide a restoring force to the sliding member 2. Specifically, the restoring force of the elastic element 5 is directed to drive the sliding member 2 to slide towards the flange 31 of the latch 3 extending out of the housing 4 (i.e., moving towards the latch 3 along the first direction). The elastic element 5 is preferably a compression spring, with one end abutting against the sliding member 2 and the other end abutting against the inner wall of the housing 4. When the sliding member 2 slides away from the latch 3 along the first direction (i.e., during the process of pulling the button 1 or inserting it into the chassis), the elastic element 5 is compressed and stores energy; when the external force applied to the button 1 is removed, the elastic element 5 releases energy and resets, driving the sliding member 2 to slide towards the latch 3 along the first direction, thereby causing the latch 3 to rotate and extend the flange 31 out of the housing 4.

[0034] Button 1 has a first position and a second position. In this embodiment, the first position is the position where button 1 extends out of the housing 4 (corresponding to...). Figure 1 The second position is the position where button 1 is retracted into housing 4 (as shown in the diagram). Figure 3 (As shown in the closed state). Figure 1 As shown, when button 1 is in the first position, button 1 does not obstruct the rotation path of latch 3, and latch 3 can rotate freely under the action of slider 2; Figure 3 As shown, when button 1 is in the second position, at least a part of button 1 is located on the rotation path of latch 3, forming a physical block on latch 3, preventing it from rotating in the direction of retracting the flange 31 into the housing 4.

[0035] The working principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] (a) Insertion locked state (see) Figure 1 ) After the circuit breaker is inserted into the chassis along the insertion direction, under the reset force of the elastic element 5, the sliding element 2 is pushed to slide towards the latch 3 in the first direction to the initial position. The sliding element 2 engages with the through hole 32 of the latch 3 through the second protrusion 23 on it, causing the latch 3 to rotate around the rotation center, so that the flange 31 at the end of the latch 3 extends out of the housing 4 and is engaged in the corresponding square groove on the inner wall of the chassis, thereby achieving mechanical locking between the circuit breaker and the chassis. At this time, since the side of the flange 31 facing the pull-out direction is the stop surface, if the operator pulls the circuit breaker outward directly without pulling the button 1, the side wall of the chassis square groove and the stop surface form a rigid abutment. The horizontal pull-out force cannot generate the rotational component force to retract the latch 3 into the housing 4. The flange 31 is tightly hooked by the side wall of the square groove, and the circuit breaker cannot be pulled out.

[0037] During the insertion of the circuit breaker into the chassis, the operator does not need to press or pull button 1; they can simply push the circuit breaker into the chassis along the insertion direction. The specific operation is as follows: A guide ramp 311 is provided on the side of the flange 31 facing the insertion direction of the latch 3. When the flange 31 moves with the circuit breaker to the chassis entrance, the front edge of the chassis wall abuts against the guide ramp 311. As the operator continues to apply insertion force, the chassis wall, through the guide ramp 311, generates a lateral force on the latch 3, causing it to rotate inwards towards the housing 4. Under the action of this force, the latch 3 overcomes the elastic force of the elastic element 5 and rotates inwards towards the housing 4. Simultaneously, through the cooperation of the through hole 32 and the second boss 23, the sliding element 2 slides away from the latch 3 along the first direction and compresses the elastic element 5, thereby creating an insertion channel for the circuit breaker. As the circuit breaker continues to advance to the predetermined installation position, flange 31 aligns with the square groove on the inner wall of the chassis. At this point, the external constraint of the chassis wall on flange 31 disappears, the elastic element 5 releases energy and resets, driving the sliding element 2 to slide along the first direction towards the latch 3, thereby causing the latch 3 to rotate in the opposite direction, causing flange 31 to extend out of the housing 4 again and automatically spring back into the square groove of the chassis, completing the mechanical locking. That is, during the insertion process, the operator's operation is only one-way pushing in, without any additional operation, achieving a convenient "plug and lock" installation experience.

[0038] (ii) Opening state (see Figure 2 ) When the circuit breaker is in the open position and needs to be removed from the chassis, the operator pulls button 1 outward, causing button 1 to move outward in the second direction (to the right). At this time, the first protrusion 11 on button 1 moves to the right synchronously with button 1, and the first protrusion 11 abuts against the inclined surface 21 of the sliding member 2 (this inclined surface 21 is located at...). Figure 5 The sliding member 2 slides along the surface of the inclined plane 21 (upper right inner side of the corner where the horizontal and vertical sections of the square hole 22 meet) and applies a rightward thrust to the inclined plane 21. Since the inclined plane 21 is tilted relative to the direction of movement of the first protrusion 11, this rightward thrust, after being decomposed by the inclined plane 21, generates a component force along the first direction, pushing the sliding member 2 to slide away from the latch 3 (sliding upwards). Simultaneously, the first protrusion 11 slides along the surface of the inclined plane 21, gradually sliding out from the horizontal section of the square hole 22 through the inclined plane 21 until the first protrusion 11 is completely disengaged from the square hole 22. During this process, the sliding member 2 compresses the elastic element 5 to store energy; at the same time, the second protrusion 23 on the sliding member 2 slides within the through hole 32 of the latch 3, causing the latch 3 to rotate in the opposite direction, causing the flange 31 of the latch 3 to disengage from the square groove of the chassis and retract into the housing 4. At this point, the lock is released, and the operator can easily pull the circuit breaker out of the chassis.

[0039] Therefore, the circuit breaker can only be pulled out after the external button 1 retracts the latch 3; and the action of the external button is only allowed to be performed when the circuit breaker is open, thus mechanically enforcing the safety protection requirement that "it can only be pulled out after the circuit breaker is open".

[0040] (iii) Closing obstruction state (see Figure 3 ) When the circuit breaker is in the closed state, button 1 is pressed (moves to the left) and held in the retracted position (i.e., the second position) within the housing 4. At this time, the first protrusion 11 on button 1 slides into the transverse section of the square hole 22 via the inclined surface 21. Button 1 itself is located on the rotation path of latch 3, forming a physical obstruction to latch 3. Because latch 3 is limited by button 1 and cannot rotate in the direction of retracting into the housing 4, the flange 31 of latch 3 always remains protruding outside the housing 4.

[0041] In this state, if an attempt is made to insert the circuit breaker into the chassis, although the guide ramp 311 of the flange 31 facing the insertion direction is in contact with the chassis wall, the buckle 3 is locked by the button 1 and cannot be rotated. The ramp cannot provide clearance, and the flange 31 is in hard interference with the chassis wall. The circuit breaker is blocked at the chassis entrance and cannot be pushed in.

[0042] Therefore, when the circuit is closed, the latch 3 is locked by the button 1 and cannot be retracted, so the circuit breaker cannot be inserted into the chassis, thus mechanically fulfilling the safety protection requirement that "it cannot be inserted when the circuit is closed".

[0043] (iv) Reset Mechanism After the circuit breaker is completely removed from the chassis, release button 1. Under the reset force of the elastic element 5, the sliding member 2 slides and resets in the first direction towards the latch 3. Through the cooperation of the second boss 23 and the through hole 32, the latch 3 rotates and resets, causing the flange 31 to extend out of the housing 4 again. At the same time, under the reset force of the elastic element 5, the sliding member 2 slides and resets in the first direction towards the latch 3 (sliding downwards). The vertical section of the square hole 22 moves downwards accordingly. The first boss 11 slides back from the vertical section to the horizontal section through the lower left corner slope. At the same time, the slope 21 pushes the button 1 to reset to the first position (extending out of the housing 4). The entire structure returns to the initial state of being ready for insertion, waiting for the next insertion operation. Example 2

[0044] This embodiment is basically the same as Embodiment 1 in structure and working principle, the difference being the specific shape of the square hole 22. In this embodiment, the section of the square hole 22 along the first direction does not extend in a straight line, but rather curves slightly in an arc shape to adapt to the movement trajectory of the first boss 11 under specific working conditions and reduce frictional resistance. This curved section also extends in the direction in which the flange 31 extends out of the housing 4, and the inclined surface 21 is located at the transition position between the curved section of the square hole 22 and the starting section along the second direction. With this structure, the movement of the first boss 11 is smoother and more efficient when it slides into the square hole 22 along the inclined surface 21. In other embodiments, the section of the square hole 22 along the first direction can also be a combination of a straight line and an arc, as long as the section extends in the direction in which the flange 31 extends and provides clearance space for the first boss 11. Example 3

[0045] This embodiment is basically the same as Embodiment 1 in structure and working principle, the difference being the rotational connection method between the buckle 3 and the housing 4. In this embodiment, the buckle 3 is rotatably installed inside the housing 4 via a rotating shaft, and the housing 4 has a shaft hole in which the rotating shaft passes. In other embodiments, the buckle 3 and the housing 4 can also be rotatably connected via an integrally formed rotating shaft on the housing 4 (the buckle 3 is fitted onto the rotating shaft and can rotate relative to it), or the buckle 3 has a rotating shaft hole and the housing 4 has a corresponding shaft hole, and the rotational connection is achieved by passing through an independent pin. Different rotational connection methods can be flexibly selected according to the manufacturing process of the housing 4 and the material of the buckle 3, all of which can ensure that the buckle 3 rotates smoothly inside the housing 4. Example 4

[0046] This embodiment is basically the same as Embodiment 1 in structure and working principle, the difference being the linkage and cooperation method between button 1 and slider 2. In this embodiment, slider 2 is provided with a boss, and button 1 is provided with an inclined surface. The boss and the inclined surface cooperate to convert the movement of button 1 in the second direction into the sliding of slider 2 in the first direction. That is, the positions of the boss and the inclined surface can be interchanged, as long as they can form an inclined surface cooperation. In other modified embodiments, the motion conversion can also be achieved through the cooperation of slider and inclined groove, all of which fall within the protection scope of this invention. Example 5

[0047] This embodiment provides a plug-in circuit breaker incorporating the aforementioned snap-fit ​​structure. The plug-in circuit breaker includes a circuit breaker body and a snap-fit ​​structure as described in Embodiment 1, the snap-fit ​​structure being disposed on the circuit breaker body. Preferably, this plug-in circuit breaker is a 1U terminal circuit breaker used in 5G communication equipment, allowing for convenient insertion and removal from the circuit via a plug-in / plug-out method. When the circuit breaker is in the open state, the operator can pull the button to retract the flange of the snap-fit ​​structure into the housing, removing the circuit breaker from the chassis; when the circuit breaker is in the closed state, the button is pressed into the circuit breaker and prevents the snap-fit ​​from rotating, preventing the circuit breaker from being inserted into the chassis. The operational safety of this plug-in circuit breaker is significantly superior to existing products.

[0048] The other parts of this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0049] Other aspects of this invention that are not detailed herein are all conventional techniques known to those skilled in the art.

[0050] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A snap-fit ​​structure for a plug-in circuit breaker, characterized in that: Includes a button (1), a slider (2), a buckle (3), and a housing (4); The buckle (3) is rotatably disposed inside the housing (4) and has a flange (31) that can extend out of the housing (4). The sliding member (2) is slidably disposed in the housing (4) and can slide along the first direction, and the sliding member (2) is linked to the buckle (3); The button (1) is movably disposed within the housing (4) and can reciprocate along the second direction, and the button (1) is linked to the slider (2); the button (1) can drive the buckle (3) to rotate through the slider (2) so that the flange (31) extends out or retracts into the housing (4); and the button (1) has a first position and a second position. When the button (1) is in the second position, the button (1) blocks the buckle (3) from rotating.

2. The snap-fit ​​structure according to claim 1, characterized in that: The first direction is perpendicular to the second direction.

3. The snap-fit ​​structure according to claim 2, characterized in that: The button (1) is provided with a first boss (11), and the slider (2) is provided with an inclined surface (21). The first boss (11) cooperates with the inclined surface (21) to convert the movement of the button (1) along the second direction into the sliding of the slider (2) along the first direction.

4. The snap-fit ​​structure according to claim 3, characterized in that: The slider (2) is also provided with a square hole (22), which extends continuously with the inclined surface (21).

5. The snap-fit ​​structure according to claim 1, characterized in that: The sliding member (2) is provided with a second boss (23), and the buckle (3) is provided with a through hole (32). The second boss (23) passes through the through hole (32). The sliding member (2) is driven to rotate by the cooperation between the second boss (23) and the through hole (32).

6. The snap-fit ​​structure according to claim 1, characterized in that: The flange (31) has an inlet ramp (311) on the side facing the insertion direction and a stop straight surface on the side facing the withdrawal direction.

7. The snap-fit ​​structure according to claim 1, characterized in that: It also includes an elastic element (5), which is disposed between the sliding element (2) and the housing (4) to provide a restoring force to the sliding element (2).

8. The snap-fit ​​structure according to claim 1, characterized in that: The latching structure has a locked state and an unlocked state; in the locked state, the flange (31) extends out of the housing (4) for locking with the chassis; in the unlocked state, the flange (31) retracts into the housing (4).

9. The snap-fit ​​structure according to claim 8, characterized in that: When the circuit breaker is in the open state, pulling the button (1) can switch the latch structure from the locked state to the unlocked state; when the circuit breaker is in the closed state, the button (1) is in the second position, and the latch (3) is blocked by the button (1) and cannot rotate to the unlocked state.

10. A plug-in circuit breaker, characterized in that: It includes a circuit breaker body and a snap-fit ​​structure as described in any one of claims 1 to 9, the snap-fit ​​structure being disposed on the circuit breaker body.

Images