A snap-in mounted motor circuit breaker

Abstract

The utility model relates to a buckle formula installed motor circuit breaker, including the circuit breaker of front shell and base connected with screw, the back of base is equipped with the guide rail groove for connecting guide rail, the guide rail groove is equipped with the buckle for holding up guide rail, the buckle includes upper clamping plate, lower clamping plate and elastic rod, lower clamping plate sets up in the lower edge of guide rail groove, upper clamping plate sets up in the upper edge both sides of guide rail groove, and elastic rod includes the positioning section of middle part and spring of both ends, the upper edge of guide rail groove is equipped with the positioning groove matched with positioning section, and positioning section is clamped in positioning groove, and spring corresponds to extend to the inside of upper clamping plate and the end portion is inclined to the lower edge of guide rail groove, realized only need to press down the circuit breaker first to make lower clamping plate and guide rail separate, and the circuit breaker is removed from guide rail while moving up, will not be restricted by the size of guide rail back space, reduced the operation difficulty of dismounting circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of snap-on circuit breaker technology, and more particularly to a snap-on motor circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. It can automatically disconnect the circuit in the event of severe overload, short circuit, or undervoltage faults, and has been widely used. Existing circuit breakers are typically connected to DIN rails or mounting plates. When connected to a DIN rail, a spring-loaded clip is installed on the back of the circuit breaker's base. Removing the circuit breaker requires reaching behind the rail and manually releasing the clip. However, the limited space behind the rail often makes it difficult to observe the clip's location and remove the circuit breaker. When connected to a mounting plate, a sliding metal connecting plate is pushed out from the upper and lower edges of the circuit breaker from a storage slot on the back of the base. The metal connecting plate has screw holes; screws are used to fix the circuit breaker to the mounting plate. This process is cumbersome, and the metal connecting plate can become stuck in the storage slot due to debris or corrosion. Therefore, designing a snap-on motor circuit breaker that improves ease of installation and disassembly, is less affected by guide rails, and eliminates the risk of electric arc has become an urgent technical problem to be solved. Summary of the Invention

[0003] To solve the above problems, the present invention provides a snap-fit ​​motor circuit breaker.

[0004] The present invention relates to a snap-fit ​​motor circuit breaker, comprising a front housing and a base connected by screws. The back of the base is provided with a guide rail groove for connecting a guide rail. The guide rail groove is provided with a snap fastener for locking the guide rail. The snap fastener includes an upper snap plate, a lower snap plate, and an elastic rod. The lower snap plate is located at the lower edge of the guide rail groove, and the upper snap plate is located on both sides of the upper edge of the guide rail groove. The elastic rod includes a positioning section in the middle and springs at both ends. The upper edge of the guide rail groove is provided with a positioning groove that matches the positioning section. The positioning section is locked in the positioning groove. The springs extend to the inner side of the upper snap plate and their ends are inclined towards the lower edge of the guide rail groove.

[0005] With the above structure, the circuit breaker is fixed to the guide rail by the guide rail being held in the guide rail groove, with the upper and lower clamping plates respectively securing the upper and lower parts of the guide rail. When installing the circuit breaker, first use the upper clamping plate to hook the back of the guide rail from above. Insert the top of the guide rail between the inner side of the upper clamping plate and the inner wall of the guide rail groove. The top of the guide rail contacts the spring of the elastic rod inside the upper clamping plate, while the bottom, against the lower clamping plate, cannot fully enter the guide rail groove. At this point, further insert the guide rail upwards, using the guide rail to compress the inclined spring, causing the spring to bend upwards until it fits against the upper edge of the guide rail groove. The bottom of the guide rail moves upwards, offsetting from the lower clamping plate, allowing the guide rail to fully enter the guide rail groove. Then release the circuit breaker; the spring, under its own elastic force, returns to its original position, pressing against the top of the guide rail. The circuit breaker is pushed upwards, causing the upper and lower clamping plates to simultaneously hook onto the back of the guide rail, thus securing the circuit breaker to the guide rail. When removing the circuit breaker, it is moved in the reverse direction according to the circuit breaker's movement trajectory during installation, causing the lower and upper clamping plates to leave the back of the guide rail in sequence, separating the circuit breaker from the guide rail. The positioning section is locked in the positioning groove to prevent the elastic rod from sliding to the side and falling out of the guide rail groove. This achieves the simultaneous hooking of the upper and lower clamping plates onto the back of the guide rail, fixing the circuit breaker to the guide rail. Simply press down on the circuit breaker to separate the lower clamping plate from the guide rail, and then move the circuit breaker upwards while rotating it forward to remove it from the guide rail. This is not limited by the size of the space behind the guide rail, reducing the difficulty of disassembling and assembling the circuit breaker.

[0006] As a further improvement of this utility model, the positioning section is an upwardly protruding and hollow arc structure, the inner wall of the positioning groove fits against the outer side of the positioning section, and the positioning groove is also provided with a locking block for inserting into the hollow part of the positioning section.

[0007] With the above structure, the positioning section is an upwardly protruding and hollow arc structure. The inner wall of the positioning groove fits with the outer side of the positioning section, eliminating the movement space of the positioning section in the positioning groove. Then, the locking block is inserted into the hollow part of the positioning section to prevent the positioning section from falling down out of the positioning groove.

[0008] As a further improvement of this utility model, the end of the spring is provided with a horizontal pressing rod, which is perpendicular to the spring and extends to the side of the upper locking plate; the locking block is provided with a guide slope that narrows the bottom.

[0009] With the above structure, by pressing the pressing rod downwards from the side of the upper plate, the spring bends downwards until it is misaligned with the upper plate. While pressing the pressing rod down, the pressing rod is pushed out of the guide rail groove. After the springs at both ends of the elastic rod are pushed out of the guide rail groove in sequence, the upper plate is no longer obstructing the movement. Pulling the spring causes the positioning section to move into the groove of the positioning slot. The worn elastic rod is then removed and replaced to ensure that the elastic rod on the circuit breaker has sufficient elastic force to support the circuit breaker. When installing the elastic rod, the operation can be performed in the same direction as when removing the elastic rod. First, push the spring into the positioning groove, insert the locking block into the hollow part of the positioning section, and then press the pressing rod down to bend the spring downwards. Align the upper plate with the guide rail groove, push the pressing rod to move it into the guide rail groove, release the pressing rod, and the spring will move upward to the inside of the upper plate due to its own elasticity; alternatively, the elastic rod can be fully inserted into the guide rail groove first, push the elastic rod upward, the spring will move to the inside of the upper plate, the pressing rod will move to the side of the upper plate, and the positioning section will enter the positioning groove from the upper edge of the guide rail groove. During the process, the positioning section first contacts the bottom of the guide slope and moves upward along the guide slope. It adapts to the gradually protruding locking block by the elastic deformation of the positioning section until the top of the positioning section completely passes the locking block, the positioning section fits against the inner wall of the positioning groove, and the locking block is inserted into the hollow part of the positioning section.

[0010] As a further improvement of this utility model, the inner side of the upper plate is provided with a first snap-fit ​​inclined surface that narrows the bottom, and the outer side of the lower plate is provided with a second snap-fit ​​inclined surface that narrows the top.

[0011] With the above structure, the upper plate has a first snap-fit ​​slope on its inner side that narrows the bottom, and the lower plate has a second snap-fit ​​slope on its outer side that narrows the top. When the upper plate hooks onto the back of the guide rail from above, the first snap-fit ​​slope contacts the guide rail, guiding the top of the guide rail to insert between the inner side of the upper plate and the inner wall of the guide rail groove. When the bottom of the guide rail moves upward to offset from the lower plate, the second snap-fit ​​slope contacts the bottom of the guide rail. At this time, the bottom of the circuit breaker is pushed closer to the guide rail, and the second snap-fit ​​slope presses the guide rail upward, assisting the bottom of the guide rail to move upward and enter the guide rail groove.

[0012] As a further improvement of this utility model, the back of the base is also provided with an integrally formed connecting plate, which is respectively set on the upper and lower edges of the base, and the connecting plate is provided with screw holes that run through the front and back.

[0013] With the above structure, the connecting plate is directly set on the upper and lower edges of the back of the base. The connecting plate has screw holes that run through the front and back. The connecting plate is fixed to the mounting plate by screws passing through the screw holes, which realizes the simple fixed installation of the circuit breaker. Attached Figure Description

[0014] Figure 1 The diagram shown is a structural schematic of this utility model.

[0015] Figure 2 The diagram shows the structure of the positioning groove in part A.

[0016] 1-Base, 2-Guide rail groove, 3-Upper clamping plate, 4-Lower clamping plate, 5-Positioning section, 6-Spring, 7-Positioning groove, 8-Clamping block, 9-Pressing rod, 10-Guide slope, 11-First clamping slope, 12-Second clamping slope, 13-Connecting plate, 14-Screw hole. Detailed Implementation

[0017] like Figures 1-2 The diagram shows a snap-fit ​​motor circuit breaker, comprising a front housing and a base 1 connected by screws. The back of the base 1 is provided with a guide rail groove 2 for connecting a guide rail. The guide rail groove 2 is provided with a snap fastener for locking the guide rail. The snap fastener includes an upper snap plate 3, a lower snap plate 4, and an elastic rod. The lower snap plate 4 is located at the lower edge of the guide rail groove 2, and the upper snap plate 3 is located on both sides of the upper edge of the guide rail groove 2. The elastic rod includes a positioning section 5 in the middle and springs 6 at both ends. The upper edge of the guide rail groove 2 is provided with a positioning groove 7 that matches the positioning section 5. The positioning section 5 is snapped into the positioning groove 7. The springs 6 extend to the inner side of the upper snap plate 3 and their ends are inclined towards the lower edge of the guide rail groove 2.

[0018] The circuit breaker is fixed to the guide rail by the upper clamping plate 3 and the lower clamping plate 4 respectively clamping the upper and lower parts of the guide rail within the guide rail groove 2. When installing the circuit breaker, first use the upper clamping plate 3 to hook the back of the guide rail from above, inserting the top of the guide rail between the inner side of the upper clamping plate 3 and the inner wall of the guide rail groove 2. The top of the guide rail contacts the spring 6 of the elastic rod inside the upper clamping plate 3, while the bottom, against the lower clamping plate 4, cannot fully enter the guide rail groove 2. At this point, further insert the guide rail upwards, using the guide rail to compress the inclined spring 6, causing the spring 6 to bend upwards until it fits against the upper edge of the guide rail groove 2. The bottom of the guide rail is offset upwards from the lower clamping plate 4, allowing the guide rail to fully enter the guide rail groove 2. Then, release the circuit breaker; the spring 6 returns to its original position under its own elastic force, pressing against the top of the guide rail. Push the circuit breaker upwards so that the upper clamping plate 3 and the lower clamping plate 4 simultaneously hook onto the back of the guide rail, thus fixing the circuit breaker on the guide rail. When removing the circuit breaker, move it in the reverse direction according to the movement trajectory of the circuit breaker during installation, so that the lower clamping plate 4 and the upper clamping plate 3 leave the back of the guide rail in sequence, and the circuit breaker separates from the guide rail. The positioning section 5 is locked in the positioning groove 7 to prevent the elastic rod from sliding to the side and falling out of the guide rail groove 2. This achieves the simultaneous hooking of the upper clamping plate 3 and the lower clamping plate 4 onto the back of the guide rail, fixing the circuit breaker on the guide rail. Simply press down on the circuit breaker to separate the lower clamping plate 4 from the guide rail, and move the circuit breaker upwards while rotating it forward to remove it from the guide rail. This is not limited by the size of the space behind the guide rail, reducing the difficulty of disassembling and assembling the circuit breaker.

[0019] The positioning section 5 is an upwardly protruding and hollow arc structure. The inner wall of the positioning groove 7 fits against the outer side of the positioning section 5. The positioning groove 7 is also provided with a locking block 8 for inserting into the hollow part of the positioning section 5.

[0020] The positioning segment 5 is an upwardly protruding and hollow arc structure. The inner wall of the positioning groove 7 fits against the outer side of the positioning segment 5, eliminating the movement space of the positioning segment 5 in the positioning groove 7. Then, the locking block 8 is inserted into the hollow part of the positioning segment 5 to prevent the positioning segment 5 from falling down out of the positioning groove 7.

[0021] The end of the spring 6 is provided with a horizontal pressing rod 9, which is perpendicular to the spring 6 and extends to the side of the upper locking plate 3; the locking block 8 is provided with a guide slope 10 that narrows the bottom.

[0022] By pressing down on the pressing rod 9 from the side of the upper plate 3, the spring 6 is bent downwards and offset from the upper plate 3. While pressing down on the pressing rod 9, the pressing rod 9 is pushed outwards from the guide rail groove 2. After the springs 6 at both ends of the elastic rod are pushed outwards from the guide rail groove 2, the upper plate 3 is no longer obstructing them. Pulling the springs 6 causes the positioning section 5 to move into the groove of the positioning groove 7. The worn elastic rod is removed and replaced to ensure that the elastic rod on the circuit breaker has sufficient elasticity to support the circuit breaker. When installing the elastic rod, the operation can be performed in the same direction as when removing the elastic rod. First, push the spring 6 into the positioning groove 7, insert the locking block 8 into the hollow part of the positioning section 5, and then press down on the pressing rod 9 to bend the spring 6 downwards and offset from the upper plate 3. Align the guide rail groove 2, push the pressing rod 9 to move into the guide rail groove 2, release the pressing rod 9, and the spring 6 moves upward to the inner side of the upper clamping plate 3 due to its own elasticity; or first, the elastic rod can be completely placed into the guide rail groove 2, push the elastic rod to move upward, the spring 6 moves to the inner side of the upper clamping plate 3, the pressing rod 9 moves to the side of the upper clamping plate 3, and the positioning segment 5 enters the positioning groove 7 from the upper edge of the guide rail groove 2. During the process, the positioning segment 5 first contacts the bottom of the guide slope 10 and moves upward along the guide slope 10. It adapts to the gradually protruding clamping block 8 by the elastic deformation of the positioning segment 5 until the top of the positioning segment 5 completely passes over the clamping block 8, the positioning segment 5 fits against the inner wall of the positioning groove 7, and the clamping block 8 is inserted into the hollow part of the positioning segment 5.

[0023] The inner side of the upper plate 3 is provided with a first snap-fit ​​inclined surface 11 that narrows the bottom, and the outer side of the lower plate 4 is provided with a second snap-fit ​​inclined surface 12 that narrows the top.

[0024] The upper plate 3 has a first snap-fit ​​inclined surface 11 on its inner side that narrows the bottom, and the lower plate 4 has a second snap-fit ​​inclined surface 12 on its outer side that narrows the top. When the upper plate 3 hooks onto the back of the guide rail from above, the first snap-fit ​​inclined surface 11 contacts the guide rail, guiding the top of the guide rail to insert between the inner side of the upper plate 3 and the inner wall of the guide rail groove 2. When the bottom of the guide rail moves up and is about to be offset from the lower plate 4, the second snap-fit ​​inclined surface 12 contacts the bottom of the guide rail. At this time, the bottom of the circuit breaker is pushed closer to the guide rail, and the second snap-fit ​​inclined surface 12 presses the guide rail upward, assisting the bottom of the guide rail to move up and enter the guide rail groove 2.

[0025] The back of the base 1 is also provided with an integrally formed connecting plate 13. The connecting plate 13 is respectively set on the upper and lower edges of the base 1, and the connecting plate 13 is provided with screw holes 14 that run through the front and back.

[0026] The connecting plate 13 is directly set on the upper and lower edges of the back of the base 1. The connecting plate 13 has screw holes 14 that run through the front and back. The connecting plate 13 is fixed to the mounting plate by passing screws through the screw holes 14, which realizes the simple fixed installation of the circuit breaker.

Claims

1. A snap-fit ​​motor circuit breaker, comprising a front housing and a base connected by screws, wherein the back of the base is provided with a guide rail groove for connecting a guide rail, and the guide rail groove is provided with a snap-fit ​​for locking the guide rail, characterized in that: The buckle includes an upper clamping plate, a lower clamping plate, and an elastic rod. The lower clamping plate is located at the lower edge of the guide rail groove, and the upper clamping plate is located on both sides of the upper edge of the guide rail groove. The elastic rod includes a positioning section in the middle and springs at both ends. The upper edge of the guide rail groove is provided with a positioning groove that matches the positioning section. The positioning section is engaged in the positioning groove. The springs extend to the inner side of the upper clamping plate and their ends are inclined to the lower edge of the guide rail groove.

2. The snap-fit ​​motor circuit breaker according to claim 1, characterized in that: The positioning section is an upwardly protruding and hollow arc structure. The inner wall of the positioning groove fits against the outer side of the positioning section. The positioning groove is also equipped with a locking block for inserting into the hollow part of the positioning section.

3. The snap-fit ​​motor circuit breaker according to claim 2, characterized in that: The end of the spring is provided with a horizontal pressing rod, which is perpendicular to the spring and extends to the side of the upper plate; the block is provided with a guide slope that narrows the bottom.

4. A snap-fit ​​motor circuit breaker according to claim 1, characterized in that: The upper plate has a first snap-fit ​​slope on its inner side that narrows the bottom, and the lower plate has a second snap-fit ​​slope on its outer side that narrows the top.

5. A snap-fit ​​motor circuit breaker according to claim 1, characterized in that: The back of the base is also equipped with an integrally formed connecting plate, which is set on the upper and lower edges of the base respectively, and the connecting plate has screw holes that run through the front and back.

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