Plug-in type circuit breaker

Abstract

The plug-in circuit breaker includes a circuit breaker housing with a locking hole and an on-off button. The circuit breaker further includes a locking member rotatably mounted inside the circuit breaker housing. The locking member has a locking protrusion at its upper portion near the locking hole, which engages with the locking hole, and a locking drive surface at its lower portion, which engages with the on-off button. When the on-off button is pressed, the on-off button pushes against the locking drive surface of the locking member, causing the locking protrusion of the locking member to rotate toward the locking hole in the circuit breaker housing. If the locking hole is not blocked, the on-off button pushes up the locking drive surface, causing the locking protrusion to protrude from the locking hole, thereby turning on the switch. If the locking hole is blocked and the locking protrusion cannot protrude from the locking hole, the locking drive surface restricts the on-off button, preventing it from being pressed to the desired position and preventing the switch from turning on. The circuit breaker of the present invention achieves various locking functions through the combination of the locking member and the on-off button, resulting in a very simple structure and low cost.

Description

[Technical field]

[0001] The present invention relates to the technical field of low voltage end-side electrical appliances, in particular to plug-in circuit breakers. [Background technology]

[0002] With the rapid development of network communication technology, especially the popularization of 5G network application, the requirements for circuit breakers to effectively improve the safety of electrical equipment are increasing, but the traditional power supply method of connecting many plugs and plug plates to one terminal circuit breaker is less likely than usual to meet the requirements for safe power consumption and equipment protection. For example, the terminal circuit breaker of 5G communication equipment needs to be upgraded and improved in terms of performance such as miniaturization, intelligence, reliability and stability, and also needs to develop many new integrated structures in terms of usage requirements, such as a structure in which the circuit breaker is easy to insert and remove like a plug and needs to be locked at the installation position. This new circuit breaker is called a plug-in type circuit breaker, but does not belong to the traditional insert type, insert type, pull-out type or general-purpose circuit breaker. The new plug-in type circuit breaker not only provides various safety protection performances of the circuit breaker to the distribution line and electrical equipment, but also meets various electrical equipment requirements for power quality, and allows the circuit breaker itself to be conveniently installed / removed from the circuit by the insert / remove means. For this reason, the structure of plug-in type circuit breakers has already been diversified. However, as electrical equipment tends to become smaller, it is urgent to further improve, optimize and upgrade the overall structure and operation method of the circuit breaker to suit the trend toward smaller size.

[0003] Although the advantage of plug-in type circuit breakers being quickly installed in the cabinet is obvious, the hidden safety hazards posed to the circuit breakers by the quick insertion and removal of plug-in type circuit breakers are more serious. For example, the circuit breaker may be mistakenly installed in the cabinet in the switched-on state. Also, the circuit breaker may be switched on when it is not installed in place. Furthermore, the circuit breaker may be mistakenly pulled out directly from the cabinet in the switched-on state, which may expose it to various charging operations.

[0004] In order to prevent the danger of electrostatic charging, existing plug-in type circuit breakers are usually provided with corresponding locking devices. However, the existing locking devices have complicated structures and usually require the arrangement of mechanisms such as locking members, releasing members, transmission members, etc., which results in more parts, occupies more space, and makes the transmission arrangement more complicated.

[0005] Also, the locking mechanism of the plug-in circuit breaker of the prior art is only provided with a locking mechanism to prevent a specific hidden safety hazard. For example, it only prevents the circuit breaker from being inserted into the cabinet in the switched-on state, but does not prevent the circuit breaker from being pulled out of the cabinet in the switched-on state. Other existing technical means only prevents the circuit breaker from being pulled out of the cabinet in the switched-on state, but does not prevent the circuit breaker from being inserted into the cabinet in the switched-on state. Another prior art technical means blocks the circuit breaker from the outside of the cabinet in the switched-on state, but when the circuit breaker is attached to the cabinet in the switched-off state, such prior art does not prevent the circuit breaker from being turned on by mistake without being completely attached in place. Therefore, a single locking device does not prevent various possibilities of inserting the circuit breaker in the switched-on state (preventing switching on before inserting into the cabinet, preventing switching on while inserting into the cabinet).

[0006] In the existing plug-in type circuit breaker with plug-in plug, multiple independent locking devices must be arranged in parallel in the circuit breaker in order to provide multiple protection functions, and the circuit breaker is prevented from being erroneously inserted or removed from the cabinet when the circuit breaker is switched on. For example, the same circuit breaker needs to be arranged with a single locking device to prevent the circuit breaker from being pulled out when the circuit breaker is switched on, and another single locking device to prevent the circuit breaker from being inserted into the cabinet when the circuit breaker is switched on. Sometimes, a locking device to prevent the circuit breaker from being switched on before being inserted into the cabinet and a locking device to prevent the circuit breaker from being switched on after being inserted into the cabinet are both required, and the two separate devices are separated. When multiple locking mechanisms coexist, the number of parts of the locking device doubles, and if any one of them breaks, the equipment is abandoned. Since it is necessary to provide independent spaces for the multiple locking mechanisms, it is impossible to further miniaturize the circuit breaker. The triggering relationship between each locking mechanism and other systems is independent, and the internal operation of each locking device is also independent. The mounting positions of the independent locking devices all need to be shifted, which makes the structure complicated and the function difficult to realize. If the independent locking devices are arranged in parallel, multiple locking protrusions will extend from the breaker window, which makes it very easy to make mistakes, increases safety risks, and worsens the user experience. Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a plug-in type circuit breaker which has a simple structure and is highly safe and reliable. [Means for solving the problem]

[0008] In order to achieve the above object, the solution of the present invention is as follows.

[0009] A plug-in type circuit breaker comprising a circuit breaker housing having a locking hole and an open / close button, further comprising a locking member, the locking member being rotatably mounted inside the circuit breaker housing, a locking protrusion that mates with the locking hole being provided at an upper portion of the locking member approaching the locking hole, and a locking drive surface that mates with the open / close button being provided at a lower portion of the locking member; when the open / close button is pressed, the open / close button pushes against the locking drive surface of the locking member, and the locking protrusion of the locking member rotates toward the locking hole of the circuit breaker housing, and if the locking hole is not blocked, the open / close button pushes up the locking drive surface to cause the locking protrusion to protrude from the locking hole, and the plug-in type circuit breaker is switched on; if the locking hole is blocked and the locking protrusion cannot protrude from the locking hole, the locking drive surface restricts the open / close button, so that the open / close button is not pressed to a predetermined position, and the plug-in type circuit breaker cannot be switched on.

[0010] Preferably, when the open / close button is pulled, the plug-in type circuit breaker is switched off and the locking member rotates to retract the locking projection into the inside of the circuit breaker housing.

[0011] Preferably, a drive projection cooperating with the locking drive surface is provided at one end of the opening / closing button adjacent one side of the locking member.

[0012] Preferably, at a lower portion of one end of the locking member that is away from the fastening hole Follower boss is further provided, Follower boss one side of the switch is connected to the locking drive surface, and when the switch button is pulled to switch the circuit breaker from a switched-on state to a switched-off state, the drive protrusion of the switch button pulls the driven boss to the Locking member is rotated, and the locking projection rotates and retracts into the inside of the circuit breaker housing.

[0013] Preferably, one end of the open / close button extending inside the circuit breaker is a driving end, a button locking groove is provided on one side of the driving end of the open / close button approaching the locking member, and the driving projection is the one side of the driving end approaching the locking projection. Button groove When the circuit breaker is in a switched-on state, the locking member Follower boss The button fastening groove is supported at an angle on one side thereof which is away from the locking protrusion.

[0014] Preferably, the locking projection is cuboidal.

[0015] Preferably, when the circuit breaker is in a switched-on state, said drive lug is located directly below said locking lug and said locking hole.

[0016] Preferably, Follower boss and the locking drive surface form an acute angle.

[0017] Preferably, when the circuit breaker is in a switched-on state, there is an included angle α between the locking drive surface and the moving direction of the on / off button, and the included angle α is less than 15 degrees.

[0018] Preferably, the interior of the circuit breaker housing comprises an operating mechanism drivingly connected to the open / close button, a movable contact connected to the operating mechanism, a static contact cooperating with the movable contact, an arc extinguishing device, an overload protection device, a short-circuit protection mechanism, an output line end, and an input line end, the open / close button and the output line end being provided at one end of the circuit breaker housing, the input line end being provided at the other end of the circuit breaker housing, the stop hole being provided on the upper surface of the circuit breaker housing, and the locking member being rotatably provided between the open / close button and the stop hole.

[0019] Preferably, the operating mechanism is provided on one side of the open / close button, the operating mechanism and the overload protection device are provided side by side between the open / close button and one side of the output line end, the short circuit protection mechanism is located between the operating mechanism and the input line end, and the short circuit protection mechanism and the arc extinguishing device are provided side by side and on one side of the operating mechanism and the overload protection device.

[0020] Preferably, the center of rotation is provided in the middle of the locking member, and the center of rotation is biased toward one end away from the locking projection. Be At a lower portion of one end of the locking member that is away from the fastening hole Follower boss is further provided, Follower boss One side of the opening / closing button is connected to the locking drive surface, and a drive protrusion is provided at one end of the opening / closing button which is close to one side of the locking member, and the drive protrusion and the locking drive surface always maintain a sliding engagement.

[0021] The locking device of the plug-in circuit breaker of the present invention achieves various locking functions by combining the locking member and the open / close button. That is, 1. The circuit breaker cannot be installed in the working position after being switched on outside the cabinet, which avoids the risk of charging. 2. If the plug-in circuit breaker is not installed in the working position while it is installed in the mounting position of the cabinet, the switch-on operation cannot be completed, which avoids the risk of charging. 3. When the plug-in circuit breaker is installed in the correct working position of the cabinet, the open / close button can normally switch on / off, but in the switched-on state, the locking device locks the plug-in circuit breaker in the working position and makes it easy to be pulled out, which avoids the charging insertion and removal operation, so that the plug-in circuit breaker has a greatly improved safety, a very simple structure, and a low cost. [Brief description of the drawings]

[0022] [Figure 1] 3 is a schematic structural diagram of a locking member and an opening / closing button according to the present invention; [Diagram 2] 13 is a schematic diagram showing the positional state of the locking member and the open / close button when the circuit breaker is not correctly installed in the working position. FIG. [Diagram 3] 10 is a schematic diagram showing the positional state of the locking member and the open / close button when the circuit breaker is properly installed in the cabinet and switched on. FIG. [Figure 4]13 is a schematic diagram showing the positional state of the locking member and the open / close button when the circuit breaker is switched on outside the cabinet; FIG. [Diagram 5] 1 is a diagram showing the combination state of the locking member and the open / close button when the open / close button is pulled to release the circuit breaker switch. The open / close button retracts the locking protrusion of the locking member into the circuit breaker housing. [Figure 6] FIG. 2 is a schematic structural diagram of the entire circuit breaker. [Figure 7] 10 is a schematic diagram showing the positional state of the locking member and the open / close button when the circuit breaker is properly installed in the cabinet and switched on. FIG. [Figure 8] FIG. 8 is a partially enlarged view of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The specific implementation of the present invention will be further described below in conjunction with the embodiment shown in Figures 1 to 8. The plug-in type circuit breaker with a switch-on prevention device of the present invention is not limited to the following description.

[0024] As shown in FIG. 6, an embodiment of a plug-in type circuit breaker includes a circuit breaker housing 3. An open / close button 1 for turning on and off the circuit breaker is provided on the circuit breaker housing 3, and an operating mechanism 5 drivingly connected to the open / close button 1, a movable contact connected to the operating mechanism, a static contact cooperating with the movable contact, an arc extinguishing device, an output line end 4, and an input line end 9 are provided inside the circuit breaker housing 3. The open / close button 1 and the output line end 4 are provided at one end of the circuit breaker housing 3, and the input line end 9 is provided at the other end of the circuit breaker housing 3. When the open / close button 1 is pressed, the open / close button 1 brings the movable contact and the static contact into contact with each other through the operating mechanism to turn on the switch. When the open / close button 1 is pulled, the open / close button 1 separates the movable contact and the static contact through the operating mechanism to turn off the switch. An overload protection device 6 is further provided inside the circuit breaker housing 3, and when the double metal piece of the overload protection mechanism is bent under overload, the operating mechanism is disengaged. A short circuit protection mechanism 7 and / or earth leakage protection mechanism is further provided inside the circuit breaker housing 3, and when a short circuit or earth leakage occurs, the operating mechanism is released. The input line end 9 is a plug-to-plug type connection terminal, and is connected to the attachment plug conductor of the mounting position 900 when the plug-in type circuit breaker is inserted into the mounting position 900 in the cabinet cavity.

[0025] A locking device is also provided in the plug-in type circuit breaker, a locking hole 31 arranged in the locking device is provided in the circuit breaker housing 3 of the plug-in type circuit breaker, and a cabinet locking hole 901 corresponding to the locking hole 31 of the plug-in type circuit breaker is provided at the mounting position 900 of the cabinet. When the plug-in type circuit breaker is mounted in the working position, the locking hole 31 of the plug-in type circuit breaker corresponds to the cabinet locking hole 901, and when the plug-in type circuit breaker is not mounted in the working position, the locking hole 31 of the plug-in type circuit breaker is offset from the cabinet locking hole 901. The above belongs to the prior art in this field, so it will not be repeated here.

[0026] As shown in Fig. 1-3, the plug-in type circuit breaker of the present invention comprises a circuit breaker housing 3 with a locking hole 31, an open / close button 1 and a locking device. The main improvement is that the locking device comprises a locking member 2 mounted inside the plug-in type circuit breaker, the locking member 2 is rotatably mounted inside the circuit breaker housing 3, the upper part of the locking member 2 is provided with a locking protrusion that mates with the locking hole 31, and the lower part of the locking member 2 is provided with a locking drive surface 23 that mates with the open / close button 1. When the open / close button 1 is pressed, the open / close button 1 pushes the locking drive surface 23 of the locking member 2, and rotates the locking protrusion 22 of the locking member 2 toward the locking hole 31 of the circuit breaker housing. When the locking hole 31 is not blocked and the locking protrusion 22 can protrude from the locking hole 31, the open / close button 1 will push up the locking drive surface 23 to make the locking protrusion protrude from the locking hole 31, and the plug-in type circuit breaker will be switched on. When the locking hole 31 is blocked and the locking projection 22 cannot protrude from the locking hole 31, the locking drive surface 23 restricts the open / close button 1 so that the open / close button 1 is not pressed into the specified position and the plug-in type circuit breaker cannot be switched on.

[0027] As shown in FIG. 3, the plug-in circuit breaker is provided at the working position, and the locking hole 31 of the plug-in circuit breaker corresponds to the cabinet locking hole 901, and when the open / close button 1 is pressed, the open / close button 1 slidably engages with the locking drive surface 23 to push the locking drive surface 23 of the locking member 2, and moves the locking protrusion 22 of the locking member 2 to rotate toward the locking hole 31 of the circuit breaker housing 3. The locking protrusion 22 protrudes from the locking hole 31 and the cabinet locking hole 901, and the open / close button 1 pushes up the locking drive surface 23, and the open / close button 1 continues to be pressed at the switch-on position, so that the plug-in circuit breaker is switched on. In addition, after the plug-in circuit breaker is switched on, the cabinet locking hole 901 engages the locking protrusion 22 with a limiting engagement, so that the plug-in circuit breaker cannot be pulled out from the cabinet mounting position in the switched-on state when correctly mounted in the cabinet. Therefore, the charged insertion / removal work is avoided.

[0028] As shown in Fig. 2, the plug-in type circuit breaker is not mounted at the working position, the stopper hole 31 of the plug-in type circuit breaker is out of position with the cabinet stopper hole 901, the stopper hole 31 of the plug-in type circuit breaker is blocked by the sheet metal of the mounting position 900 of the cabinet, and the locking boss 22 of the locking member 2 is restricted by the cabinet and does not protrude from the stopper hole 31 to the outside of the circuit breaker while rotating. At this time, when the open / close button 1 is pressed, the locking protrusion 22 is restricted by the sheet metal of the cabinet, so that the locking drive surface 23 of the open / close button 1 is not pushed up completely, and the locking drive surface 23 is inclined toward the moving direction of the open / close button 1, restricting the open / close button 1, so that the open / close button 1 cannot move into the inside of the circuit breaker and cannot be pressed to a predetermined position. The plug-in type circuit breaker cannot be switched on while it is mounted at the mounting position of the cabinet. Therefore, the charged insertion / removal work is avoided.

[0029] As shown in Fig. 4, when the plug-in type circuit breaker is turned on outside the cabinet and the open / close button 1 is pressed, the open / close button 1 moves to the inside of the circuit breaker, the open / close button 1 pushes against the locking protrusion driving surface 23 of the locking member 2, and the locking protrusion 22 of the locking member 2 rotates toward the locking hole 31 of the circuit breaker housing 3. Since the locking hole 31 is not blocked, the open / close button 1 pushes up the locking driving surface 23, causing the locking protrusion 22 to protrude from the locking hole 31 and be exposed to the outside of the circuit breaker, and the open / close button 1 continues to be pressed at the switch-on position, turning on the plug-in type circuit breaker. At this time, the locking protrusion 22 protrudes from the locking hole 31 and becomes higher than the height of the mounting position 900 of the cabinet, and the locking protrusion 22 abuts against the sheet metal of the installation position 900 of the cabinet, so that the plug-in type circuit breaker cannot be inserted into the working position of the mounting position of the cabinet. Therefore, the charged insertion / removal work is avoided.

[0030] The locking device of the plug-in type circuit breaker of the present invention achieves various locking functions by combining the locking member 2 and the open / close button 1. That is, 1. After the circuit breaker is switched on outside the cabinet, it cannot be installed in the working position, which avoids the risk of charging. 2. If the plug-in type circuit breaker is not installed in the working position while it is installed in the mounting position of the cabinet, it cannot complete the switching operation, which avoids the risk of charging. 3. When the plug-in type circuit breaker is installed in the correct working position of the cabinet, the open / close button can normally switch on / off, but in the switched-on state, the locking device locks the plug-in type circuit breaker in the working position and makes it easy to be pulled out, which avoids the charging insertion and removal operation, so that the plug-in type circuit breaker has a significantly improved safety, a very simple structure, and a low cost.

[0031] 1, in a preferred solution of the locking device of the plug-in type circuit breaker of the present invention, a rotation center 24 is provided in the locking member 2, a locking hole 31 is provided in the circuit breaker housing 3, a locking protrusion 22 corresponding to the locking hole 31 is provided at the upper part of one end of the locking member 2 away from the rotation center and close to the locking hole 31, and a locking drive surface 23 mating with the opening / closing button 1 is provided at the lower part of the locking member 2 away from the locking hole 31. The locking member 2 rotates to one side around the rotation center 24 to make the locking protrusion 22 protrude from the locking hole 31, or rotates to the other side around the rotation center 24 to make the locking protrusion 22 retract into the circuit breaker housing 3.

[0032] When the open / close button 1 is pressed, the open / close button 1 presses against the locking drive surface 23 of the locking member 2, and the open / close button 1 and the locking drive surface 23 always maintain a sliding fit, causing the locking protrusion 22 of the locking member 2 to rotate toward the locking hole 31 of the circuit breaker housing 3. When the locking protrusion 22 can protrude from the locking hole 31, the open / close button 1 pushes up the locking drive surface 23, and the plug-in circuit breaker is switched on. After the plug-in circuit breaker is switched on, the open / close button 1 restricts the locking member 2 so that the locking member 2 cannot be rotated in the opposite direction. When the open / close button 1 is used instead of an elastic member to restrict the locking member 2, even if the locking protrusion 22 is pressed under the action of an external force, the locking protrusion 22 will not retract into the inside of the circuit breaker housing 3. Therefore, components are saved and safety is improved. When the locking hole 31 is blocked and the locking protrusion cannot protrude from the locking hole 31, the locking drive surface 23 is inclined in the moving direction of the open / close button 1, and the locking drive surface 23 restricts the open / close button 1 so that the open / close button 1 is not pressed to the specified position, and the plug-in type circuit breaker cannot be switched on.

[0033] Preferably, the locking protrusion 22 is cubic, and when the locking protrusion 22 protrudes from the locking hole 31, both sides of the cubic boss are parallel to both side walls of the locking hole 31, which effectively prevents the plug-in circuit breaker from being inserted into the mounting position when switched on outside the cabinet, and also prevents the plug-in circuit breaker from being pulled out in the switched-on state after being mounted in the working position of the cabinet. Of course, the locking protrusion 22 is not limited to a cubic shape, and may be other structures such as a protrusion with round corners or a T-shaped protrusion.

[0034] Preferably, the locking driving surface 23 is a flat surface, so that the open / close button 1 can move smoothly when slidably mated with the locking driving surface 23. Of course, the locking driving surface 23 can also be an arc-shaped surface or have some grooves or protrusions.

[0035] The open / close button 1 is slidably mated with the locking drive surface 23 through the end foot of one end of the open / close button 1. Preferably, the drive protrusion 12 cooperating with the locking drive surface 23 is provided at one end of the open / close button 1 close to one side of the locking member 2, and when the switch is turned on, the locking drive surface 23 is pushed up through the drive protrusion 12. Preferably, when the open / close button 1 is pressed to turn on the switch to a predetermined position, the drive protrusion 12 is located directly below the locking protrusion 22 and the stopper hole 31 when the plug-in type circuit breaker is in the switched-on state, so as to play a better supporting and restricting role. Of course, one end of the open / close button 1 may not be provided with the drive protrusion 12, and the open / close button 1 may be directly slidably mated with the locking drive surface 23 through the right-angle side of one end of the open / close button 1, or a round corner may be provided at the right-angle side of one end of the open / close button 1 to perform the mating.

[0036] Preferably, when the open / close button 1 is pulled, the plug-in type circuit breaker is switched off and the locking member 2 rotates to retract the locking projection 22 into the circuit breaker housing. As shown in Figs. 1 and 5, in a preferred embodiment of the locking member 2, the rotation center 24 is provided in the middle of the locking member 2, and the rotation center 24 is biased toward one end away from the locking projection 22. Be A locking projection 22 corresponding to the locking hole 31 is provided at the upper part of the locking member 2 at one end close to the locking hole 31, and a locking drive surface 23 that matches with the opening / closing button 1 is provided at the lower part of the locking member 2 away from the locking hole 31. Follower boss Also, Follower bossOne side of 21 is connected to the locking drive surface 23, and a drive protrusion 12 is provided at one end of the open / close button 1 close to the locking member 2. When the open / close button 1 is pressed, the open / close button 1 cooperates with the locking drive surface 23 via the drive protrusion 12, pushing the open / close button 1 up and causing the locking protrusion 22 to protrude from the stop hole 31, so that the circuit breaker is switched on. When the plug-in type circuit breaker is mounted in the working position and in the switched-on state, pulling the open / close button 1 can switch the circuit breaker from the switched-on state to the switched-off state. As shown in FIG. 5, when the open / close button 1 is pulled, the open / close button 1 first slidably engages with the locking drive surface 23 via the drive protrusion 12, and then causes the circuit breaker to be switched off, and the drive protrusion 12 slides against the locking member 2. Follower boss When the open / close button 1 is rotated clockwise by pulling the driven boss 21, the locking protrusion 22 rotates and retreats into the circuit breaker housing 3, and the plug-in circuit breaker is removed from the working position in the switched-off state. While the open / close button 1 switches the circuit breaker on and off, the open / close button 1 and the locking drive surface 23 are always in contact with each other and slidably engage with each other.

[0037] More preferably, as shown in Figs. 1, 3 and 5, one end of the open / close button 1 extending into the circuit breaker is a driving end 11, and the button locking groove 13 is provided on one side of the driving end 11 of the open / close button 1 approaching the locking member 2, and the driving projection 12 is provided on the other side of the driving end 11 approaching the locking projection 22. Button groove 3, when the open / close button 1 is pressed to switch on the circuit breaker, the drive projection 12 of the open / close button 1 is located directly below the locking projection 22 and the locking hole 31, and the locking member 2 Follower boss 21 inclines and supports one side of the button retaining groove 13 away from the retaining protrusion 22, so that the retaining member 2 is restricted to rotate clockwise and retract into the circuit breaker housing 3. As shown in FIG. 5, when the open / close button 1 is pulled to switch off the circuit breaker, the retaining member 2 Follower boss21 engages with the driving protrusion of the button fastening groove 13 approaching one side of the locking protrusion 22, pulling the locking member 2 to rotate clockwise, and the locking protrusion 22 retracts into the circuit breaker housing 3. The engagement of the driving protrusion 12, the button fastening groove 13, the passive protrusion 21 and the locking driving surface 23 achieves the release of the plug-in circuit breaker in the switched-off state and pulls the circuit breaker out of the cabinet, and also the button fastening groove 13 and Follower boss 21 also plays a role of restricting the switch in the on state, preventing the open / close button 1 from rotating in the opposite direction, and further restricting the range of rotation of the locking member 2. Therefore, the reliability of the locking device is greatly improved, and the structure is particularly simple, without the need for combination with other parts.

[0038] Furthermore, in a degraded embodiment of the present invention, it is clearly necessary to pull the circuit breaker out of the cabinet in the switched-off state to achieve release. Follower boss It is also possible that the locking member 21 and / or the driving boss 12 are not provided. For example, in another solution, after the open / close button 1 is pulled and the circuit breaker is switched off, the pulling of the open / close button 1 no longer restricts the locking member 2, and the weight of one end of the locking member 2 provided with the locking protrusion 22 is greater than that of the other end. The locking protrusion 22 rotates under the action of gravity and retracts into the circuit breaker housing. Preferably, the locking member 2 has an eccentric structure, and the rotation center 24 of the locking member 2 is biased to one end away from the locking protrusion 22. In another solution, an elastic member connected to the locking member 2 moves the locking member 2 to rotate in the direction in which the locking protrusion 22 retracts into the circuit breaker housing. The elastic member can be a torsion spring or a spreader spring. However, this solution not only increases the number of parts, but also strengthens the force when pressing the open / close button 1.

[0039] Specifically, as shown in FIG. 1, in a preferred embodiment of the locking member 2 of the present invention, the middle part of the locking member 2 is rotatably mounted inside the circuit breaker housing 3, the locking projection 22 is provided at the upper part of one end of the locking member 2 close to the locking hole 31, and the locking drive surface 23 that engages with the open / close button 1 is provided at the lower part of the locking member 2 away from the locking hole 31. Follower boss Also, Follower boss One side of 21 is connected to the locking drive surface 23, Follower boss 21 and the locking drive surface 23 form an acute angle.

[0040] More preferably, as shown in Fig. 7-8, when the open / close button 1 is pressed to switch to a predetermined position, when the plug-in circuit breaker is in a switched-on state, there is an included angle α between the locking driving surface 23 and the moving direction of the open / close button 1, i.e., the horizontal direction, and the included angle α is less than 15 degrees. Also, the driving protrusion 12 can be located directly below the locking protrusion 22 and the stopper hole 31, and both sides of the cubic boss are parallel to both side walls of the stopper hole 31.

[0041] As shown in Fig. 6, the preferred embodiment of the plug-in type circuit breaker of the present invention includes a circuit breaker housing 3. An open / close button 1 is provided on the circuit breaker housing 3, and the inside of the circuit breaker housing 3 includes an operating mechanism 5 drivingly connected to the open / close button 1, a movable contact connected to the operating mechanism, a static contact cooperating with the movable contact, an arc-extinguishing device 8, an overload protection device 6, a short-circuit protection mechanism 7, an output line end 4, an input line end 9, and the locking device of the present invention. The open / close button 1 and the output line end 4 are provided at one end of the circuit breaker housing 3, and the input line end 9 is provided at the other end of the circuit breaker housing 3. The front panel of the plug-in type circuit breaker is located on the left side, the open / close button 1 is attached to the front panel, and the plug-in type circuit breaker can be inserted between two metal sheets 4 of the cabinet along the circuit breaker insertion and installation direction F (to the right as shown in Fig. 7), and pulled out of the cabinet along the opposite direction of the circuit breaker insertion and installation direction F. A locking hole 31 is provided on the top surface of the circuit breaker housing 3, and the locking device has a locking member 2 rotatably provided between the open / close button 1 and the locking hole 31. The operating mechanism 5 is provided on one side of the open / close button 1, the operating mechanism 5 and the overload protection device 6 are provided side by side between the open / close button 1 and one side of the output line end 4, the short circuit protection mechanism 7 is located between the operating mechanism 5 and the input line end 9, and the short circuit protection mechanism 7 and the arc extinguishing device 8 are provided side by side and located on one side of the operating mechanism 5 and the overload protection device 6. Specifically, according to the direction shown in FIG. 6 , the open / close button 1 is provided on the left side of the circuit breaker, the stop hole 31 is provided on the upper wall of the circuit breaker housing 3, the locking member 2 is located between the open / close button 1 and the stop hole 31 at the upper right of the button, the output line end 4 is provided on the left side of the interior of the circuit breaker below the open / close button 1, the input line end 9 is provided on the right side of the interior of the circuit breaker, the operating mechanism 5 is provided on the right side of the open / close button 1, the overload protection device 6 is provided on the right side of the output line end 4 below the operating mechanism 5, the short-circuit protection mechanism 7 is provided on the left side of the input line end 9 to the right of the operating mechanism 5, and the arc extinguishing device 8 is provided below the short-circuit protection mechanism 7 and to the left of the input line end 9 to the right of the overload protection device 6.

[0042] As mentioned above, the present invention is further described in detail in combination with certain preferred embodiments, but the specific examples of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, some simple inferences or substitutions can be made without departing from the concept of the present invention, which should be considered as belonging to the protection scope of the present invention.

Claims

1. A plug-in type circuit breaker including a circuit breaker housing (3) having a stop hole (31) and an open / close button (1), Further comprising a locking member (2), the locking member (2) being rotatably attached inside the circuit breaker housing (3), a locking protrusion (22) that mates with the locking hole (31) being provided at an upper portion of the locking member (2) close to the locking hole (31), and a locking drive surface (23) that mates with the open / close button (1) being provided at a lower portion of the locking member (2); When the open / close button (1) is pressed, the open / close button (1) pushes against the locking drive surface (23) of the locking member (2), and the locking protrusion (22) of the locking member (2) rotates toward the stop hole (31) of the circuit breaker housing (3). If the stop hole (31) is not blocked, the open / close button (1) pushes up the locking drive surface (23) to make the locking protrusion (22) protrude from the stop hole (31), and the plug-in circuit breaker is switched on; if the stop hole (31) is blocked and the locking protrusion (22) cannot protrude from the stop hole (31), the locking drive surface (23) restricts the open / close button (1) so that the open / close button (1) is not pressed to a predetermined position, and the plug-in circuit breaker cannot be switched on. A plug-in type circuit breaker.

2. When the open / close button (1) is pulled, the plug-in type circuit breaker is switched off and the locking member (2) rotates to retract the locking projection (22) into the circuit breaker housing.

2. The plug-in type circuit breaker according to claim 1.

3. A drive projection (12) cooperating with the locking drive surface (23) is provided at one end of the opening / closing button (1) close to one side of the locking member (2).

2. The plug-in type circuit breaker according to claim 1.

4. A driven boss (21) is further provided at the bottom of one end of the locking member (2) away from the stop hole (31), and one side of the driven boss (21) is connected to the locking drive surface (23). When the open / close button (1) is pulled to switch the circuit breaker from a switched-on state to a switched-off state, the drive protrusion (12) of the open / close button (1) pulls the driven boss (21) to rotate the locking member (2), and the locking protrusion (22) rotates and retracts into the inside of the circuit breaker housing (3).

4. The plug-in type circuit breaker according to claim 3.

5. One end of the open / close button (1) extending inside the circuit breaker is a driving end (11), and a button fastening groove (13) is provided on one side of the driving end (11) of the open / close button (1) approaching the locking member (2), and the driving protrusion (12) is located on one side of the button fastening groove (13) approaching the locking protrusion (22). When the circuit breaker is in a switched-on state, the driven boss (21) of the locking member (2) inclines and supports one side of the button fastening groove (13) away from the locking protrusion (22).

5. The plug-in type circuit breaker according to claim 4.

6. The plug-in type circuit breaker according to claim 1, wherein said locking projection (22) is cuboidal.

7. When the circuit breaker is in the switched-on state, the driving lug (12) is located directly below the locking lug (22) and the locking hole (31).

4. The plug-in type circuit breaker according to claim 3.

8. 5. A plug-in circuit breaker as claimed in claim 4, characterized in that an acute angle is formed between said driven boss (21) and said locking drive surface (23).

9. When the circuit breaker is in a switched-on state, there is an angle α between the locking drive surface (23) and the moving direction of the open / close button (1), and the angle α is less than 15 degrees.

2. The plug-in type circuit breaker according to claim 1.

10. The inside of the circuit breaker housing (3) is provided with an operating mechanism (5) drivingly connected to the open / close button (1), a movable contact connected to the operating mechanism (5), a static contact cooperating with the movable contact, an arc extinguishing device (8), an overload protection device (6), a short circuit protection mechanism (7), an output line end (4), and an input line end (9), the open / close button (1) and the output line end (4) are provided at one end of the circuit breaker housing (3), the input line end (9) is provided at the other end of the circuit breaker housing (3), the stop hole (31) is provided on the upper surface of the circuit breaker housing (3), and the locking member (2) is rotatably provided between the open / close button (1) and the stop hole (31).

2. The plug-in type circuit breaker according to claim 1.

11. The operating mechanism (5) is provided on one side of the open / close button (1), the operating mechanism (5) and the overload protection device (6) are provided side by side between the open / close button (1) and the output line end (4), the short circuit protection mechanism (7) is located between the operating mechanism (5) and the input line end (9), and the short circuit protection mechanism (7) and the arc extinguishing device (8) are provided side by side and are located on one side of the operating mechanism (5) and the overload protection device (6).

11. The plug-in circuit breaker according to claim 10.

12. A rotation center (24) is provided in the middle of the locking member (2), and the rotation center (24) is provided biased toward one end remote from the locking projection (22). A driven boss (21) is further provided at the lower part of the one end of the locking member (2) remote from the stop hole (31), and one side of the driven boss (21) is connected to the locking drive surface (23). A drive projection (12) is provided at one end of the opening / closing button (1) approaching one side of the locking member (2), and the drive projection (12) and the locking drive surface (23) always maintain a sliding relationship.

2. The plug-in type circuit breaker according to claim 1.

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