Tripping structure and under-voltage release

Abstract

The application relates to the technical field of low-voltage electrical appliances, and particularly discloses a tripping structure and an under-voltage release. The tripping structure is characterized in that the second end of a tripping button is slidably connected with the first end of a contact support, and the second end of the contact support is slidably connected with a shell. When an external force is applied to the first end of the tripping button, the tripping button can drive the contact support to rotate so as to make the contact bridge conductively connect or disconnect the incoming terminal and the outgoing terminal of the under-voltage release, thereby realizing the starting or breaking of the under-voltage release. The under-voltage release can be started or broken without additionally arranging a switch, the opening and breaking of the under-voltage release can be realized without increasing the volume of the under-voltage release, the space in a distribution box is not occupied, and the safety during maintenance is improved. In addition, the tripping structure comprises two parts of the tripping button and an auxiliary contact assembly, the structure is simple, and the corresponding functions can be realized while the occupation of the internal space of the under-voltage release is reduced.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and in particular to a tripping structure and an undervoltage tripping device. Background Technology

[0002] The undervoltage release is mainly used for undervoltage protection of circuits. Its working principle is to achieve undervoltage protection of motor circuits through the cooperation and comparison of the coil electromagnetic system and the return spring. As an independent product, when the undervoltage release is used in conjunction with an AC motor starter, one of its outer sides needs to be installed side by side with the other outer side of the AC motor starter so that the contact head of the push rod inside the undervoltage release can extend into the interior of the AC motor starter through the reserved holes on the two outer sides, so as to cooperate with the release rod inside the AC motor starter. When the undervoltage release control power supply or main circuit voltage is 85% to 110% of the rated operating voltage, the electromagnet system engages, and the AC motor starter can reliably close. When the undervoltage release control power supply or main circuit voltage is 35% to 70% of the rated operating voltage, the electromagnet system releases, and the push rod drives the trip unit in the AC motor starter to trip, causing the AC motor starter to disconnect the main circuit, thereby protecting the motor and other equipment. When the undervoltage release control power supply or main circuit voltage is 0% to 35% of the rated operating voltage, the AC motor starter reliably disconnects.

[0003] Currently, undervoltage release devices on the market consist of only a few functional components, including an electromagnet system, coil input / output terminals, and a push rod. As shown in patent CN103280384A, when the coil input / output terminals are connected to the control power supply, at least one switch must be connected in series to control the energization or de-energization of the electromagnet system. When starting the motor by closing the main circuit of an AC motor starter, the undervoltage release control power switch must first be closed. The AC motor starter can only close normally when the undervoltage release is working properly. Furthermore, when the AC motor starter trips due to a fault, the undervoltage release cannot disconnect in time; the undervoltage release control power switch must be manually disconnected to disconnect the undervoltage release. In addition, when the undervoltage release control power switch is far from the AC motor starter, multiple personnel are needed to repair the circuit, increasing the risk of electric shock during repairs. When the undervoltage release control power switch is placed in the distribution box along with the undervoltage release and starter, it increases the size of the distribution box. Summary of the Invention

[0004] The purpose of this invention is to provide a tripping structure and an undervoltage trip unit that can realize the opening and disconnection of the undervoltage trip unit without increasing its size, without occupying space in the distribution box, and improves the safety of maintenance.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On the one hand, a tripping structure is provided, partially disposed within the housing of an undervoltage release device, the tripping structure comprising:

[0007] A trip button is slidably connected to the housing, and the first end of the trip button is located on the outside of the housing;

[0008] An auxiliary contact assembly, disposed within the housing, includes a contact support. A first end of the contact support is slidably connected to a second end of the trip button, and a second end of the contact support is slidably connected to the housing. A contact bridge is provided on the contact support. When an external force is applied to the first end of the trip button, the trip button drives the contact support to rotate so that the contact bridge electrically connects or disconnects the input and output terminals of the undervoltage release device.

[0009] As an optional technical solution for the above-mentioned tripping structure, the tripping button includes:

[0010] The first button lever is arc-shaped, and one end of the first button lever is connected to a button cover. The button cover is located on the outside of the housing, and the button cover and the inlet terminal and outlet terminal are located on different sides of the housing. The inner side of the first button lever is provided with an arc-shaped sliding plate, and the sliding plate is slidably connected to the housing.

[0011] The second button lever is a straight lever, one end of which is connected to the other end of the first button lever. The other end of the second button lever is provided with a first sliding shaft, and the contact support is provided with a first sliding groove, in which the first sliding shaft is slidably disposed.

[0012] As an optional technical solution for the above-mentioned tripping structure, a limiting member is provided on the outer side of the other end of the first button rod. The limiting member is used to limit the travel of the tripping button when it is pressed or to block the opening on the housing for the tripping button to slide.

[0013] As an optional technical solution of the above-mentioned tripping structure, the tripping structure further includes a locking component. When the tripping button is subjected to external force, it has a first position in which the contact bridge conductively connects the input terminal and the output terminal of the undervoltage release device. The locking component keeps the tripping button in the first position.

[0014] As an optional technical solution for the above-mentioned tripping structure, the locking component includes:

[0015] A locking rod, one end of which is rotatably connected to the housing, and an abutment portion is provided on the locking rod;

[0016] A locking elastic element is provided, which connects the housing and the other end of the locking rod, and is configured to cause the abutment portion to abut against the release button.

[0017] As an optional technical solution of the above-mentioned tripping structure, the second end of the contact support is connected to a reset elastic element, which is configured to drive the contact support to rotate so that the contact bridge disconnects the input terminal and the output terminal of the undervoltage release device.

[0018] On the other hand, an undervoltage release device is provided, including a housing, with an input terminal and an output terminal respectively provided at opposite ends of the housing, and a release structure as described in any of the above claims provided inside the housing, the release structure being used to electrically connect or disconnect the input terminal and the output terminal.

[0019] As an optional technical solution for the aforementioned undervoltage release device, an electromagnetic component is also provided inside the housing. The drive end of the electromagnetic component is connected to one end of a push rod, and the other end of the push rod extends out of the housing for connection with the starter's release device. One power supply end of the electromagnetic component is conductively connected to one of the input terminal and the output terminal, and the other power supply end of the electromagnetic component is conductively connected or disconnected to the other of the input terminal and the output terminal through the release structure. The drive end of the electromagnetic component can drive the push rod to move according to the magnitude of the supply voltage to actuate the starter's release device.

[0020] As an optional technical solution for the aforementioned undervoltage release device, the electromagnetic component includes:

[0021] A stationary iron core is fixedly installed inside the housing. One power supply end of the stationary iron core is conductively connected to one of the input terminal and the output terminal, and the other power supply end of the stationary iron core is conductively connected or disconnected to the other of the input terminal and the output terminal through the tripping structure.

[0022] A movable iron core is movably disposed within the housing. The movable iron core can be attracted by the stationary iron core. One end of the push rod is connected to the movable iron core.

[0023] A reaction elastic element is connected to the moving iron core. When the attraction force of the stationary iron core to the moving iron core is less than the elastic force of the reaction elastic element, the reaction elastic element is used to separate the moving iron core from the stationary iron core.

[0024] As an optional technical solution for the aforementioned undervoltage release device, an insulating element is provided between the electromagnetic component and the incoming terminal and / or the outgoing terminal.

[0025] The beneficial effects of this invention are:

[0026] The tripping structure provided by this invention has a second end of the trip button slidably connected to the first end of the contact support, and the second end of the contact support slidably connected to the housing. When an external force is applied to the first end of the trip button, the trip button can drive the contact support to rotate, causing the contact bridge to electrically connect or disconnect the input and output terminals of the undervoltage release device, thereby realizing the start or stop of the undervoltage release device. This eliminates the need for an additional switch to start or stop the undervoltage release device, achieving the opening and stopping of the undervoltage release device without increasing its size, saving space in the distribution box, and improving maintenance safety. Furthermore, the tripping structure comprises a trip button and an auxiliary contact assembly, resulting in a simple structure that reduces the space occupied by the undervoltage release device while achieving the corresponding function. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the starter and undervoltage release device provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the undervoltage release device provided in an embodiment of the present invention;

[0029] Figure 3 This is a first-view structural diagram of the undervoltage release device provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the internal structure of the undervoltage release device provided in an embodiment of the present invention from a second perspective. Figure 1 ;

[0031] Figure 5 This is a schematic diagram of the structure of the insulating component provided in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the undervoltage release device provided in an embodiment of the present invention from a second perspective. Figure 2 ;

[0033] Figure 7 This is a first-view structural schematic diagram of the trip button provided in an embodiment of the present invention;

[0034] Figure 8 This is a second-view structural schematic diagram of the trip button provided in an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the internal structure of the undervoltage release device provided in an embodiment of the present invention from a second perspective. Figure 3 ;

[0036] Figure 10 This is a schematic diagram of the shell structure provided in an embodiment of the present invention;

[0037] Figure 11 This is a first-view structural schematic diagram of the contact support provided in an embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of the contact support structure from a second perspective provided in an embodiment of the present invention.

[0039] In the picture:

[0040] 100. Undervoltage release; 101. Tripping structure; 102. Housing; 103. Incoming terminal; 104. Outgoing terminal; 105. Electromagnetic assembly; 106. Push rod; 107. Insulating component;

[0041] 1021. Opening; 1022. Limiting groove; 1023. Second sliding shaft; 1024. Hook post;

[0042] 1031. Incoming line terminal block;

[0043] 1041. Outgoing terminal block;

[0044] 1051. Stationary iron core; 1052. Moving iron core; 1054. Power supply terminal block;

[0045] 1071. Insulating board; 1072. Connecting block;

[0046] 200. Starter; 201. Starter button;

[0047] 1. Trip button; 2. Auxiliary contact assembly; 3. Locking assembly;

[0048] 11. First button lever; 12. Second button lever; 13. Button cover; 14. Slide plate; 15. First sliding shaft; 16. Limiting component; 17. First clearance groove;

[0049] 21. Contact support; 211. First slide groove; 212. Second slide groove; 213. Second clearance groove; 214. Third clearance groove; 215. Mounting groove; 22. Contact bridge; 23. Reset elastic element; 24. First positioning post; 25. Positioning elastic element; 26. Second positioning post;

[0050] 31. Locking rod; 32. Locking elastic element; 33. Abutment part. Detailed Implementation

[0051] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only 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.

[0052] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] like Figure 1 and Figure 2 As shown, this embodiment provides an undervoltage release device 100, which is typically used as an accessory to an AC motor starter (hereinafter referred to as starter 200) in conjunction with the starter 200.

[0055] The undervoltage release device 100 provided in this embodiment includes a housing 102. At opposite ends of the housing 102 are respectively provided an input terminal 103 and an output terminal 104. At least one input terminal 103 and at least one output terminal 104 are provided, and the input terminal 103 and the output terminal 104 are arranged in a one-to-one correspondence. The input terminal 104 and the output terminal 103 are used to connect to a control power supply or main circuit.

[0056] like Figure 3As shown, an electromagnetic component 105 is provided inside the housing 102. The drive end of the electromagnetic component 105 is connected to one end of a push rod 106. The other end of the push rod 106 extends out of the housing 102 to connect with the trip unit of the starter 200. After the undervoltage trip unit 100 is connected to the starter 200, the end of the push rod 106 located outside the housing 102 passes through the outer shell of the starter 200 and is placed inside the starter 200, connecting with the trip unit of the starter 200. One power supply terminal of the electromagnetic component 105 is electrically connected to one of the input terminal 103 and the output terminal 104. The other power supply terminal of the electromagnetic component 105 can be electrically connected to the other of the input terminal 103 and the output terminal 104. The drive end of the electromagnetic component 105 can drive the push rod 106 to move according to the magnitude of the supply voltage, thereby actuating the trip unit of the starter 200.

[0057] After the incoming terminal 103 and outgoing terminal 104 are connected to the control power supply or main circuit, the electromagnetic component 105 is energized. If the supply voltage is 85% to 110% of the rated operating voltage, the drive end of the electromagnetic component 105 drives the push rod 106 to disengage from the trip unit of the starter 200, allowing the starter 200 to close. If the supply voltage is 35% to 70% of the rated operating voltage, the electromagnetic component 105 releases, and the drive end of the electromagnetic component 105 drives the push rod 106 to trigger the trip unit of the starter 200, causing the starter 200 to disconnect the main circuit, thereby protecting the motor and other equipment. When the supply voltage is 0% to 35% of the rated operating voltage, the starter 200 disconnects. Therefore, the undervoltage trip unit 100 can trip the starter 200 and disconnect the main circuit when the control power supply or main circuit is undervoltage, thus protecting the motor and other equipment.

[0058] In some embodiments, the electromagnetic assembly 105 includes a stationary iron core 1051, a moving iron core 1052, and a reaction elastic member. The stationary iron core 1051 is fixedly disposed within the housing 102. One power supply terminal of the stationary iron core 1051 is electrically connected to one of the input terminal 103 and the output terminal 104, and the other power supply terminal of the stationary iron core 1051 is electrically connected to the other of the input terminal 103 and the output terminal 104. The moving iron core 1052 is movably disposed within the housing 102 and can be attracted by the stationary iron core 1051. One end of the push rod 106 is connected to the moving iron core 1052. The reaction elastic member is connected to the moving iron core 1052. When the attraction force of the stationary iron core 1051 to the moving iron core 1052 is less than the elastic force of the reaction elastic member, the reaction elastic member is used to separate the moving iron core 1052 from the stationary iron core 1051. Optionally, one end of the moving iron core 1052 is rotatably connected to the housing 102, and the other end of the moving iron core 1052 is connected to the push rod 106. The stroke of the moving iron core 1052 is the stroke of the push rod 106. The moving iron core 1052 is attracted or released by the stationary iron core 1051, which causes the push rod 106 to separate from the trip unit of the starter 200 or triggers the trip unit of the starter 200.

[0059] Further explanation is needed: when the stationary iron core 1051 is energized, if the magnetic force generated by the stationary iron core 1051 is sufficient to overcome the reaction force of the elastic element, the stationary iron core 1051 attracts the moving iron core 1052. The push rod 106 moves with the moving iron core 1052, and is positioned to ensure that the starter 200 is in a position where it can be closed. When the magnetic force generated by the stationary iron core 1051 is insufficient to overcome the reaction force of the elastic element, the moving iron core 1052 separates from the stationary iron core 1051 under the action of the reaction force of the elastic element. The push rod 106 moves with the moving iron core 1052, and is positioned to ensure that the starter 200 is in a disengaged state.

[0060] like Figure 4 As shown, the undervoltage release device 100 also includes a release structure 101, which is partially housed within the housing 102. The release structure 101 is used to electrically connect or disconnect the input terminal 103 and the output terminal 104, thereby supplying or de-energizing the electromagnetic component 105.

[0061] Specifically, the tripping structure 101 includes a tripping button 1 and an auxiliary contact assembly 2. The tripping button 1 is slidably connected to the housing 102, and the first end of the tripping button 1 is located outside the housing 102. The auxiliary contact assembly 2 is disposed inside the housing 102 and includes a contact support 21. The first end of the contact support 21 is slidably connected to the second end of the tripping button 1, and the second end of the contact support 21 is slidably connected to the housing 102. A contact bridge 22 is provided on the contact support 21. When an external force is applied to the first end of the tripping button 1, the tripping button 1 drives the contact support 21 to rotate so that the contact bridge 22 electrically connects or disconnects the inlet terminal 103 and the outlet terminal 104 of the undervoltage release device 100, thereby realizing the start or disconnection of the undervoltage release device 100 without the need for an additional switch to start or disconnect the undervoltage release device 100. The tripping structure is integrated within the undervoltage release 100. Without increasing the size of the existing undervoltage release 100, it enables the opening and closing of the undervoltage release 100, without occupying space in the distribution box, and improves maintenance safety. Furthermore, the tripping structure 101 comprises two parts: a trip button 1 and an auxiliary contact assembly 2. Its simple structure reduces the space occupied by the undervoltage release 100 while achieving the required functions.

[0062] It should be further explained that the undervoltage release 100 has three operating states. First, when force is applied to the first end of the release button 1, causing the contact bridge 22 to conductively connect the input terminal 103 and output terminal 104 of the undervoltage release 100, power can be supplied to the electromagnetic component 105, and the undervoltage release 100 operates normally. Even without undervoltage, the starter 200 can still close normally. Second, in the event of undervoltage, the undervoltage release 100 trips the starter 200, thereby disconnecting the main circuit. Third, when the starter 200 trips due to a fault, the starter button 201 on the starter 200 pops out (see starter button 201 for details). Figure 1 As shown), and apply force to the first end of the trip button 1 on the undervoltage release device 100 in the opposite direction to the pressing force. After the starter button 201 pops out, it can push up the trip button 1, thereby driving the contact support 21 to rotate so that the contact bridge 22 disconnects the inlet terminal 103 and outlet terminal 104 of the undervoltage release device 100, so that the undervoltage release device 100 can be disconnected in time.

[0063] The undervoltage release 100 can achieve interlocking linkage with the starter 200. The starter 200 can only work normally when the undervoltage release 100 is working normally. When the starter 200 trips due to a fault, the undervoltage release 100 can disconnect at the same time without the need for an additional undervoltage release control power switch to disconnect the undervoltage release 100. The tripping structure 101 is equivalent to the undervoltage release control power switch. During maintenance, fewer maintenance personnel are needed, which facilitates circuit maintenance and improves safety during maintenance. The tripping structure 1 is set inside the undervoltage release 100, which does not increase the size of the undervoltage release 100 and does not occupy space in the distribution box.

[0064] One power supply terminal of the aforementioned stationary iron core 1051 is connected to the input terminal 103, and the other power supply terminal of the stationary iron core 1051 is connected to the output terminal 104. The tripping structure 101 can be disposed between the input terminal 103 and the stationary iron core 1051 or between the output terminal 104 and the stationary iron core 1051 to achieve conductive connection or disconnection between the main circuit or control power supply and the stationary iron core 1051. Without changing the overall size of the undervoltage release device 100, the space inside the housing 102 is limited. If the tripping structure 101 is disposed between the electromagnetic component 105 and the input terminal 103, the electromagnetic component 105 needs to be disposed close to the output terminal 104. If the tripping structure 101 is disposed between the electromagnetic component 105 and the output terminal 104, the electromagnetic component 105 needs to be disposed close to the input terminal 103, providing sufficient space for the placement of the tripping structure 101.

[0065] The electromagnetic component 105 is positioned close to the input terminal 103 or the output terminal 104. To improve the insulation between the electromagnetic component 105 and the input terminal 103 or the output terminal 104, and to prevent breakdown, leakage, or other problems, an insulating element 107 is provided between the input terminal 103 or the output terminal 104 and the electromagnetic component 105 (the location of the insulating element 107 is shown in the figure). Figure 3 (As shown).

[0066] In some other embodiments, insulating elements 107 can be provided between the input terminal 103 and the output terminal 104 and the electromagnetic component 105 to improve the insulation performance of the undervoltage release device 100.

[0067] like Figure 5 As shown, the insulating component 107 includes an insulating plate 1071 and a plug block 1072 connected to the insulating plate 1071. The housing 102 is provided with a plug slot. The plug block 1072 is inserted into the plug slot to fix the insulating plate 1071. The insulating plate 1071 is placed between the inlet terminal 103 or the outlet terminal 104 and the electromagnetic component 105.

[0068] Furthermore, continue to refer to Figure 3 As shown, inside the housing 102, an inlet terminal block 1031 is provided at the inlet terminal 103, and an outlet terminal block 1041 is provided at the outlet terminal 104. If the tripping structure 101 is located between the inlet terminal 103 and the electromagnetic component 105, the outlet terminal block 1041 is connected to one power supply terminal of the electromagnetic component 105, and the other power supply terminal of the electromagnetic component 105 is connected to a power supply terminal block 1054, which is connected to the inlet terminal block 1031 via a contact bridge 22. If the tripping structure 101 is located between the outlet terminal 104 and the electromagnetic component 105, the inlet terminal block 1031 is connected to one power supply terminal of the electromagnetic component 105, and the other power supply terminal of the electromagnetic component 105 is connected to a power supply terminal block 1054, which is connected to the outlet terminal block 1041 via a contact bridge 22. An insulating component 107 can be provided between the aforementioned incoming terminal block 1031 and / or outgoing terminal block 1041 and the electromagnetic component 105. The insulating plate 1071 of the insulating component 107 is placed between the incoming terminal block 1031 or outgoing terminal block 1041 and the electromagnetic component 105.

[0069] In some embodiments, such as Figure 6 and Figure 7As shown, the trip button 1 includes a first button lever 11 and a second button lever 12. The first button lever 11 is arc-shaped, and one end of the first button lever 11 is connected to a button cover 13. The button cover 13 is located on the outside of the housing 102, and the button cover 13, the inlet terminal 103, and the outlet terminal 104 are located on different sides of the housing 102. The shape of the button cover 13 matches the shape of the starter button 201 of the starter 200. The button cover 13 is located above the starter button 201. When the starter button 201 pops out, it can effectively push up the trip button 1. When the trip button 1 is pressed, the starter button 201 can be closed. The starter 200 and the undervoltage trip unit 100 can both work normally, realizing the linkage between the starter 200 and the undervoltage trip unit 100. The inner side of the first button lever 11 is provided with an arc-shaped slide plate 14, which is slidably connected to the housing 102, making the movement trajectory of the trip button 1 arc-shaped, shortening the movement stroke of the trip button 1, and converting the external force on the trip button 1 into a force that drives the contact support 21 to make the contact bridge 22 electrically connect or disconnect the incoming terminal 103 and the outgoing terminal 104. The second button lever 12 is a straight lever, one end of which is connected to the other end of the first button lever 11. The other end of the second button lever 12 is provided with a first sliding shaft 15, and the contact support 21 is provided with a first sliding groove 211, in which the first sliding shaft 15 is slidably disposed. The first sliding groove 211 limits the swing range of the trip button 1, ensuring that the trip button 1 does not swing excessively and interfere with other components while making the contact bridge 22 electrically connect or disconnect the incoming terminal 103 and the outgoing terminal 104.

[0070] Optionally, the inlet terminal 103 and the outlet terminal 104 are disposed at the ends of the housing 102. Preferably, the inlet terminal 103 and the outlet terminal 104 are disposed at both ends of the housing 102. The button cover 13 of the trip button 1 is placed on the top of the housing 102. The direction in which the external force is applied to the trip button 1 is different from the direction of movement of the contact bridge 22. The direction in which the first slide groove 211 extends is consistent with the direction of movement of the contact bridge 22.

[0071] like Figure 8 As shown, the arc of the slide plate 14 is consistent with that of the first button rod 11, ensuring that the release button 1 will not jam when subjected to external force, thus guaranteeing the smooth movement of the release button 1. The housing 102 is provided with a limiting groove 1022, the shape of which matches the shape of the slide plate 14. The slide plate 14 is slidably disposed within the limiting groove 1022, serving to guide and limit the position of the slide plate 14.

[0072] In some embodiments, a limiting member 16 is provided on the outer side of the other end of the first button lever 11. The limiting member 16 is used to limit the travel of the trip button 1 when pressed or to block the opening on the housing 102 for the trip button 1 to slide. The limiting member 16 has two functions: First, the size of the opening on the housing 102 must meet the travel of the trip button 1. When the trip button 1 is pressed, the first button lever 11 of the trip button 1 can close the opening 1021 to prevent impurities and other contaminants from entering the housing 102. When the trip button 1 is subjected to a force opposite to that of pressing, part of the first button lever 11 is placed outside the housing 102, and part of the opening 1021 is not blocked. Therefore, the limiting member 16 can block this part of the opening 1021 to prevent impurities and other contaminants from entering the housing 102. Second, when the trip button 1 is pressed, the limiting member 16 can press against other components inside the housing 102, such as the stationary iron core 1051 of the electromagnetic component 105. At this time, the trip button 1 is in a fully pressed state. The contact bridge 22 electrically connects the inlet terminal 103 and the outlet terminal 104. The limiting member 16 can prevent the trip button 1 from being over-pressed and damaging other components inside the housing 102.

[0073] Optionally, the limiting member 16 includes a protrusion protruding from the first button rod 11, and the direction of the protrusion is the same as the extension direction of the first button rod 11, and the outer side of the protrusion is consistent with the curvature of the outer surface of the first button rod 11, so as to ensure that the release button 1 does not get stuck during the movement.

[0074] Continue to refer to Figure 8 As shown, a first clearance groove 17 is recessed on one side of the second button lever 12. The release button 1 can rotate to avoid other components inside the housing 102, increasing the rotation stroke of the release button 1 and avoiding interference with other components inside the housing 102. The shape, size, and position of the first clearance groove 17 can be set according to the shape, size, and position of the components inside the housing 102 that need to be avoided, and are not specifically limited here.

[0075] In some embodiments, refer to Figure 9 As shown, the tripping structure 101 also includes a locking component 3. When the tripping button 1 is subjected to external force, it has a first position in which the contact bridge 22 makes conductive connection between the input terminal 103 and the output terminal 104 of the undervoltage release device 100. The locking component 3 keeps the tripping button 1 in the first position, so that the input terminal 103 and the output terminal 1074 are in a stable conductive state.

[0076] Optionally, the locking assembly 3 includes a locking rod 31 and a locking elastic member 32. One end of the locking rod 31 is rotatably connected to the housing 102, and the locking rod 31 is provided with an abutment portion 33. The locking elastic member 32 connects the housing 102 and the other end of the locking rod 31, and the locking elastic member 32 is configured to cause the abutment portion 33 to abut against the release button 1. Specifically, during the process of applying pressure to the release button 1, the abutment portion 33 gradually contacts the release button 1 and drives the locking rod 31 to rotate about the axis rotatably connected to the housing 102. The locking elastic member 32 is compressed and accumulates elastic potential energy, and the locking elastic member 32 has a tendency to cause the abutment portion 33 to abut against the release button 1 to lock the position of the release button 1. When the release button 1 is pushed outward, the elastic potential energy stored in the locking elastic element 32 is released, causing the locking rod 31 to rotate around the axis rotatably connected to the housing 102. The locking rod 31 is reset, and the final contact part 33 will separate from the release button 1.

[0077] Furthermore, the abutment portion 33 contacts the outer surface of the first button rod 11 of the release button 1. The outer surface is an arc-shaped surface. The locking rod 31 is approximately L-shaped. The end of the vertical rod of the locking rod 31 is rotatably connected to the housing 102. The end of the horizontal rod of the locking rod 31 is connected to one end of the locking elastic member 32. The other end of the locking elastic member 32 is connected to the housing 102, and the locking elastic member 32 extends towards the vertical rod of the locking rod 31. The abutment portion 33 is disposed on the vertical rod of the locking rod 31 and is disposed towards the release button 1. As the abutment portion 33 gradually contacts the release button 1, the locking rod 31 is subjected to force and rotates around the axis rotatably connected to the housing 102, compressing the locking elastic member 32. When the release button 1 is subjected to an outward ejection force, the locking rod 31 resets under the action of the elastic force accumulated in the locking elastic member 32.

[0078] The second end of the aforementioned contact support 21 is slidably connected to the housing 102, such as... Figure 9 , Figure 10 and Figure 11 As shown, the second end of the contact support 21 is provided with a second sliding groove 212, and the housing 102 is provided with a second sliding shaft 1023. The second sliding shaft 1023 is slidably disposed in the second sliding groove 212. The direction of extension of the second sliding groove 212 matches the direction of extension of the first sliding groove 211, ensuring that the rotation of the contact support 21 enables the contact bridge 22 to connect the inlet terminal 103 and the outlet terminal 104. Furthermore, the second sliding groove 212 also limits the range of rotation of the contact support 21. The arrangement of the second sliding shaft 1023 and the second sliding groove 212 serves to connect the contact support 21 and the housing 102.

[0079] A reset elastic element 23 is connected to the second end of the contact support 21. The reset elastic element 23 is configured to drive the contact support 21 to rotate so that the contact bridge 22 disconnects the input terminal 103 and the output terminal 104 of the undervoltage release device 100. Furthermore, when the trip button 1 is pressed, the reset elastic element 23 is compressed and accumulates elastic potential energy. When the trip button 1 is pushed outward, the reset elastic element 23 releases its elastic potential energy to drive the contact support 21 to reset, thus assisting the trip button 1 in driving the contact support 21 to move.

[0080] Optionally, a first positioning post 24 is provided at the second end of the contact support 21, and the reset elastic element 23 is a spring, with one end of the spring inserted into the first positioning post 24 and the other end of the spring fixed to the housing 102.

[0081] like Figure 10 and Figure 11 As shown, the contact support 21 has a second clearance groove 213 and a third clearance groove 214 on opposite sides, respectively. The second clearance groove 213 is used for clearance. Figure 10 The hook post 1024 shown on the housing 102 and the third clearance groove 214 are used to avoid interference between the contact support 21 and the hook post 1024 or other components when the contact support 21 is activated, and provide sufficient clearance for the contact bridge 22 to connect the inlet terminal 103 and the outlet terminal 104. The size, shape and position of the second clearance groove 213 and the third clearance groove 214 can be set according to the shape, size and position of the components that need to be avoided in the housing 102, and are not specifically limited here.

[0082] like Figure 12 As shown, the contact support 21 has a mounting groove 215, and a positioning elastic element 25 is provided in the mounting groove 215. One end of the positioning elastic element 25 is connected to the first side wall of the mounting groove 215, and the other end of the positioning elastic element 25 is connected to the contact bridge 22. The positioning elastic element 25 causes the contact bridge 22 to abut against the second side wall of the mounting groove 215. The second side wall is opposite to the first side wall. At least one end of the contact bridge 22 extends out of the mounting groove 215 and is used to connect the incoming terminal 103 and the outgoing terminal 104. That is, the power supply terminal block 1054 of the electromagnetic component 105 is connected to the incoming terminal block 1031 or the outgoing terminal block 1041 through the contact bridge 22. The positioning elastic element 25 enables the contact bridge 22 to stably connect the incoming terminal 103 and the outgoing terminal 104.

[0083] To facilitate the installation of the positioning elastic element 25, a second positioning post 22 is provided on the first side wall of the mounting groove 215, and one end of the positioning elastic element 25 is sleeved on the second positioning post 26.

[0084] In some embodiments, continue to refer to Figure 9As shown, the undervoltage release device 100 has two input terminals 103 and two output terminals 104 at its two ends, with each input terminal 103 and output terminal 104 corresponding to the other. The contact support 21 has two contact bridges 22 as described above, each contact bridge 22 being used to electrically connect a pair of input terminals 103 and output terminals 104, with the specific connection structure described above. One pair of input terminals 103 and output terminals 104 can be used for connection to the electromagnetic component 105 as described above, while the other pair of input terminals 103 and output terminals 104 can be used to connect to alarm devices to achieve some auxiliary functions; no specific limitations are made here.

[0085] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A tripping structure, partially disposed within the housing (102) of an undervoltage release device (100), characterized in that, The tripping structure (101) includes: A trip button (1) is slidably connected to the housing (102), and the first end of the trip button (1) is placed outside the housing (102); An auxiliary contact assembly (2) is disposed within the housing (102) and includes a contact support (21). The first end of the contact support (21) is slidably connected to the second end of the trip button (1), and the second end of the contact support (21) is slidably connected to the housing (102). A contact bridge (22) is provided on the contact support (21). When an external force is applied to the first end of the trip button (1), the trip button (1) is used to drive the contact support (21) to rotate so that the contact bridge (22) electrically connects or disconnects the inlet terminal (103) and outlet terminal (104) of the undervoltage release device (100). The trip button (1) includes: A first button lever (11) is arc-shaped. One end of the first button lever (11) is connected to a button cover (13). The button cover (13) is placed on the outside of the housing (102), and the button cover (13) is placed on a different side of the housing (102) from the inlet terminal (103) and the outlet terminal (104). An arc-shaped sliding plate (14) is provided on the inner side of the first button lever (11), and the sliding plate (14) is slidably connected to the housing (102). The second button lever (12) is a straight rod. One end of the second button lever (12) is connected to the other end of the first button lever (11). The other end of the second button lever (12) is provided with a first sliding shaft (15). The contact support (21) is provided with a first sliding groove (211). The first sliding shaft (15) is slidably disposed in the first sliding groove (211).

2. The tripping structure according to claim 1, characterized in that, The other end of the first button lever (11) is provided with a limiting member (16), which is used to limit the travel of the release button (1) when it is pressed or to block the opening (1021) on the housing (102) for the release button (1) to slide.

3. The tripping structure according to claim 1, characterized in that, The tripping structure (101) further includes a locking component (3), and the tripping button (1) has a first position after an external force is applied, which makes the contact bridge (22) electrically connect the input terminal (103) and the output terminal (104) of the undervoltage release device (100), and the locking component (3) keeps the tripping button (1) in the first position.

4. The tripping structure according to claim 3, characterized in that, The locking component (3) includes: Locking rod (31), one end of which is rotatably connected to the housing (102), and the locking rod (31) is provided with an abutment part (33). A locking elastic element (32) is connected to the housing (102) and the other end of the locking rod (31), and the locking elastic element (32) is configured to cause the abutment portion (33) to abut against the release button (1).

5. The tripping structure according to claim 1, characterized in that, The second end of the contact support (21) is connected to a reset elastic element (23), which is configured to drive the contact support (21) to rotate so that the contact bridge (22) disconnects the input terminal (103) and output terminal (104) of the undervoltage release device (100).

6. An undervoltage release device, characterized in that, The device includes a housing (102), with an inlet terminal (103) and an outlet terminal (104) respectively at opposite ends. The housing (102) is provided with a tripping structure (101) as described in any one of claims 1-5. The tripping structure (101) is used to electrically connect or disconnect the inlet terminal (103) and the outlet terminal (104).

7. The undervoltage release device according to claim 6, characterized in that, The housing (102) is also provided with an electromagnetic component (105). The driving end of the electromagnetic component (105) is connected to one end of a push rod (106). The other end of the push rod (106) extends out of the housing (102) for connection with the trip unit of the starter (200). One power supply end of the electromagnetic component (105) is electrically connected to one of the input terminal (103) and the output terminal (104). The other power supply end of the electromagnetic component (105) is electrically connected or disconnected to the other of the input terminal (103) and the output terminal (104) through the trip structure (101). The driving end of the electromagnetic component (105) can drive the push rod (106) to move according to the magnitude of the power supply voltage to drive the trip unit of the starter (200) to operate.

8. The undervoltage release device according to claim 7, characterized in that, The electromagnetic component (105) includes: A stationary iron core (1051) is fixedly disposed inside the housing (102). One power supply end of the stationary iron core (1051) is electrically connected to one of the input terminal (103) and the output terminal (104). The other power supply end of the stationary iron core (1051) is electrically connected or disconnected from the other of the input terminal (103) and the output terminal (104) through the tripping structure (101). A movable iron core (1052) is movably disposed within the housing (102). The movable iron core (1052) can be attracted by the stationary iron core (1051). One end of the push rod (106) is connected to the movable iron core (1052). The reaction elastic element is connected to the moving iron core (1052). When the attraction force of the stationary iron core (1051) to the moving iron core (1052) is less than the elastic force of the reaction elastic element, the reaction elastic element is used to separate the moving iron core (1052) from the stationary iron core (1051).

9. The undervoltage release device according to claim 7, characterized in that, An insulating element (107) is provided between the electromagnetic component (105) and the incoming terminal (103) and / or the outgoing terminal (104).

Images