Leakage tripping module and leakage protection circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an electric leakage tripping module and an electric leakage protection circuit breaker, which are characterized in that a reset button and a test button in the electric leakage tripping module are integrated on the same module base, so that the assembly difficulty is effectively reduced; and secondly, compared with the traditional circuit breaker, the design of a metal electricity taking sheet is canceled, and a direct contact type testing mechanism in which the microswitch is in direct contact with the testing button is adopted, so that the contact pressure is changed into vertical direct pressure from traditional lateral extrusion, and the mechanical service life is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a leakage tripping module and a circuit breaker with leakage protection. Background Art

[0002] As a core device for electrical safety protection, the reliability of residual current circuit breakers (RCBs) is directly related to personal and equipment safety. According to the mandatory requirements of national standard GB16917, RCBs must be equipped with a simulated residual current mechanism. This mechanism periodically generates simulated residual current to verify the effectiveness of the residual current tripping and resetting mechanism, ensuring reliable tripping in emergencies.

[0003] The following technical defects are common in leakage circuit breakers currently on the market: (1) Structural separation leads to inefficient assembly: the leakage trip reset mechanism and the simulated leakage mechanism adopt a split design and need to be installed and positioned separately in the circuit breaker housing. The assembly process is complicated and prone to cumulative errors; (2) The simulation mechanism is not reliable enough:

[0004] Existing simulated leakage mechanisms mostly use metal power strips as current triggering elements. For example, Chinese patent application No. 202321493881.6 discloses a leakage circuit breaker with a test button device. After long-term use, it is easy to increase the contact resistance due to elastic fatigue, and even cause deformation and failure. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a leakage trip module and a circuit breaker with leakage protection to solve the technical problems in the prior art.

[0006] Based on the above objectives, the present invention provides a leakage trip module for use in a circuit breaker, comprising a module base and:

[0007] A reset button is slidably connected to the module base, and a limit block extending outward is provided at the bottom end of the reset button;

[0008] A push spring, with two ends respectively abutting against the module base and the reset button;

[0009] A test button, slidably connected to the module base;

[0010] A fixed micro switch, whose contacts abut against the bottom of the test button;

[0011] Fixed leakage release;

[0012] A push rod hingedly connected to the module base, having a first movable end and a second movable end, wherein the second movable end is bent to form a blocking block that cooperates with the limit block;

[0013] an electrically operated linkage member hinged to the module base, comprising a body and a first connecting rod and a second connecting rod extending from the body, wherein the first connecting rod is adapted to be positioned with the first movable end, and the second connecting rod is adapted to be connected to a locking mechanism of the circuit breaker;

[0014] A torsion spring with two ends respectively abutting against the module base and the push rod;

[0015] In which, the push rod has at least a first position and a second position; when the top rod of the leakage release is not pushed out, the push rod is in the first position, and the blocking block limits the limit block of the reset button; when the top rod of the leakage release is pushed out, the push rod rotates to the second position to release the limit of the blocking block, and the reset button pops out under the action of the push spring.

[0016] As an optional embodiment, the push rod and the electric-operated linkage have overlapping hinge centers.

[0017] As an optional embodiment, when the push rod is in the first position, the upper side surface of the limit block abuts against the lower side surface of the blocking block; when the push rod is in the second position, the outer side surface of the limit block abuts against the front side surface of the blocking block.

[0018] As an optional embodiment, when the push rod rotates to the second position, its first movable end pushes the first connecting rod of the electric operation linkage, triggering the locking mechanism of the circuit breaker to open the circuit breaker through the second connecting rod.

[0019] As an optional implementation, the push spring is a compression spring, and the direction of its elastic force is coaxial with the sliding direction of the reset button.

[0020] As an optional embodiment, a limiting slide groove 1 and a limiting slide groove 2 are provided on the module base, wherein the reset button is slidably set in the limiting slide groove 1, and the test button is slidably set in the limiting slide groove 2.

[0021] As another embodiment of the present invention, a circuit breaker with leakage protection is provided, comprising a housing and a locking mechanism, and further comprising the leakage trip module as described above, wherein the module base of the leakage trip module is fixedly installed in the housing;

[0022] Wherein, the second connecting rod of the electric-operated linkage is connected to the locking mechanism, and:

[0023] When the test button presses the micro switch, a simulated leakage signal is generated to trigger the leakage release;

[0024] When the top rod of the leakage release is pushed out, the push rod is driven to rotate around the hinge axis, so that the blocking block releases the blocking of the reset button limit block, and the reset button pops out under the action of the push spring. At the same time, the first movable end of the push rod pushes the first connecting rod of the electric operation linkage, and triggers the locking mechanism to open the circuit breaker through the second connecting rod.

[0025] As an optional embodiment, it further includes a circuit board fixedly disposed in the housing, and the micro switch is welded on the circuit board and electrically connected to the circuit board.

[0026] As an optional embodiment, the housing is provided with a first hole and a second hole, at least a portion of the reset button is exposed through the first hole, and at least a portion of the test button is exposed through the second hole.

[0027] Beneficial effects of the present invention: The embodiments of the present invention provide a leakage trip module and a circuit breaker with leakage protection, which effectively reduce the difficulty of assembly by integrating the reset button and the test button in the leakage trip module on the same module base; secondly, compared with traditional circuit breakers, the metal power extraction plate design is eliminated and a direct-contact test mechanism in which the micro switch and the test button are in direct contact is adopted. The contact pressure is changed from traditional lateral extrusion to vertical direct pressure, which greatly improves the mechanical life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a partial assembly diagram of a circuit breaker according to an embodiment of the present utility model (showing only the housing and the leakage trip module);

[0030] Figure 2 For the embodiment of the utility model Figure 1 View A of (the push rod is in the first position);

[0031] Figure 3 For the embodiment of the utility model Figure 1 View A of (the push rod is in the second position);

[0032] Figure 4 This is an assembly diagram of the leakage trip module according to an embodiment of the present utility model;

[0033] Figure 5 This is an exploded view of the leakage trip module according to an embodiment of the present utility model;

[0034] Figure 6 A schematic diagram of a module base according to an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of a reset button according to an embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the push rod of the embodiment of the utility model Figure 1 ;

[0037] Figure 9 Schematic diagram of the push rod of the embodiment of the utility model Figure 2 ;

[0038] Figure 10 A schematic diagram of an electric-operated linkage according to an embodiment of the present invention;

[0039] Figure 11 A schematic diagram of a leakage release according to an embodiment of the present invention;

[0040] Figure 12 A schematic diagram of a housing according to an embodiment of the present invention;

[0041] Figure 13 A schematic diagram of a locking mechanism according to an embodiment of the present invention;

[0042] Figure 14 Schematic diagram of the position of the housing and the locking mechanism of an embodiment of the present utility model.

[0043] The following are marked in the figure:

[0044] 1. Reset button; 10. Limit block; 11. Upper side of limit block; 12. Outer side of limit block; 2. Module base; 21. Front cover; 22. Rear cover; 3. Push spring; 4. Micro switch; 5. Push rod; 51. First movable end; 52. Block block; 53. Lower side of block block; 54. Front side of block block; 55. Arc-shaped groove; 6. Electric linkage; 60. Main body; 61. First connecting rod; 62. Second connecting rod; 7. Leakage release; 70. Push rod; 8. Test button; 9. Torsion spring; 100. Housing; 200. Locking mechanism; 201. Receiving groove. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0046] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0047] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 11 、 Figure 12 and Figure 14 As shown, as an embodiment of the present invention, a circuit breaker with leakage protection is disclosed, including a housing 100, a locking mechanism 200 and a leakage trip module, wherein the leakage trip module includes a module base 2; a reset button 1, which is slidably connected to the module base 2, and a limit block 10 extending outward is provided at the bottom end of the reset button 1, as shown in FIG. Figure 7 As shown; a push spring 3, the two ends of which respectively abut the module base 2 and the reset button 1; a test button 8, which is slidably connected to the module base 2; a fixed micro switch 4, whose contacts abut the bottom of the test button 8; a fixed leakage release 7; a push rod 5 hingedly arranged with the module base 2, which has a first movable end 51 and a second movable end, the second movable end being bent to form a blocking block 52 that cooperates with the limit block 10, as shown Figure 8 and Figure 9 As shown; the electric linkage member 6 is hinged to the module base 2, which includes a body 60 and a first link 61 and a second link 62 extending from the body 60, the first link 61 and the first movable end 51 position adaptation, the second link 62 is adapted to connect the circuit breaker locking mechanism 200, such as Figure 10 As shown; the torsion spring 9, the two ends of which respectively abut the module base 2 and the push rod 5;

[0048] Among them, such as Figure 2 and Figure 3As shown, the push rod 5 has at least a first position and a second position; when the push rod 70 of the leakage release 7 is not pushed out, the push rod 5 is in the first position, and the blocking block 52 limits the limiting block 10 of the reset button 1; when the push rod 70 of the leakage release 7 is pushed out, the push rod 5 rotates to the second position to release the limiting block 52, and the reset button 1 pops out under the action of the push spring 3.

[0049] When the test button 8 presses the micro switch 4, a simulated leakage signal is generated to trigger the leakage release 7;

[0050] When the push rod 70 of the leakage release 7 is pushed out, the push rod 5 is driven to rotate around the hinge axis, so that the blocking block 52 releases the blockage of the limit block 10 of the reset button 1, and the reset button 1 pops out under the action of the push spring 3. At the same time, the first movable end 51 of the push rod 5 pushes the first connecting rod 61 of the electric operation linkage 6, triggering the locking mechanism 200 to open the circuit breaker through the second connecting rod 62.

[0051] In this embodiment, when the status of the circuit breaker needs to be tested, the test button 8 is pressed, causing the test button 8 to press the microswitch 4, generating a simulated leakage signal that triggers the leakage release 7. This causes the top rod 70 of the leakage release 7 to be ejected, driving the push rod 5 to rotate about the hinge axis, causing the blocking block 52 to release the block 10 of the reset button 1. The reset button 1 is ejected under the action of the push spring 3. At the same time, the first movable end 51 of the push rod 5 pushes the first connecting rod 61 of the electric operating linkage 6, triggering the locking mechanism 200 to open the circuit breaker through the second connecting rod 62. That is, in this embodiment, if the reset button 1 is ejected by pressing the test button 8 and the circuit breaker is opened and the power is cut off, it indicates that the circuit breaker is normal. Pressing the reset button 1 to reset the circuit breaker, the push rod 5 is restored to its initial position under the action of the torsion spring 9, and the blocking block 52 resumes its blockage of the block 10.

[0052] During daily use of the circuit breaker, if a leakage current is generated due to a fault in the circuit breaker and the leakage release 7 is triggered, the top rod 70 of the leakage release 7 is pushed out, driving the push rod 5 to rotate around the hinge axis, so that the blocking block 52 releases the blockage of the limit block 10 of the reset button 1, and the reset button 1 pops out under the action of the push spring 3. At the same time, the first movable end 51 of the push rod 5 pushes the first connecting rod 61 of the electric operation linkage 6, triggering the locking mechanism 200 to open the circuit breaker through the second connecting rod 62, thereby achieving the purpose of automatic power off to ensure safety.

[0053] The circuit breaker provided in the embodiment of the present invention effectively reduces the difficulty of assembly by integrating the reset button 1 and the test button 8 in the leakage trip module on the same module base 2. Secondly, compared with traditional circuit breakers, the metal power extraction plate design is eliminated and a direct-contact test mechanism is adopted in which the micro switch 4 is in direct contact with the test button 8. The contact pressure is changed from traditional lateral extrusion to vertical direct pressure, which greatly improves the mechanical life.

[0054] As an optional implementation, Figure 2 and Figure 3 As shown, the push rod 5 and the electric linkage member 6 have overlapping hinge centers. In this embodiment, the thickness of the transmission mechanism is effectively reduced by coaxially hingedly connecting the push rod 5 and the electric linkage member 6, effectively optimizing space utilization and better adapting to the miniature circuit breaker housing 100.

[0055] In this embodiment, Figure 2 As shown, the push rod 5 is in the first position, at which time the blocking block 52 limits the limiting block 10 of the reset button 1 to prevent the reset button 1 from popping up; Figure 3 As shown, when the push rod 5 rotates to the second position, the blocking block 52 releases the limit on the limit block 10, and the reset button 1 pops out under the action of the push spring 3, thereby indicating that the circuit breaker is leaking.

[0056] As an optional implementation, Figure 2 、 Figure 3 、 Figure 7 as well as Figure 8 As shown, when the push rod 5 is in the first position, the upper side surface 11 of the limit block 10 abuts against the lower side surface 53 of the blocking block 52. At this time, the blocking block 52 limits the limit block 10 to lock the reset button 1 in the current position; when the push rod 5 is in the second position, the outer side surface 12 of the limit block 10 abuts against the front side surface 54 of the blocking block 52. At this time, the limit block 10 limits the blocking block 52 to lock the push rod 5 in this position, and the reset button 1 is pressed down to disengage the outer side surface of the limit block 10 from the front side surface of the blocking block 52. The push rod 5 will then return to the first position under the torsion of the torsion spring 9.

[0057] As an optional embodiment, when the push rod 5 rotates to the second position, its first movable end 51 pushes the first connecting rod 61 of the electric operating linkage 6, triggering the locking mechanism 200 of the circuit breaker to open through the second connecting rod 62, thereby achieving power off of the circuit breaker.

[0058] Optional, such as Figure 9 As shown, the first movable end 51 is further provided with an arc-shaped groove 55 adapted to the position of the first connecting rod 61 .

[0059] like Figure 13 As shown, the locking mechanism 200 is provided with a receiving groove 201 for receiving the second connecting rod 62. The second connecting rod 62 is inserted into the receiving groove 201 so that when the push rod 5 moves from the first position to the second position, the second connecting rod 62 pushes against the side wall of the receiving groove 201 to drive the locking mechanism 200 to move and realize the opening of the circuit breaker.

[0060] like Figure 6As shown, the module base 2 includes a front cover 21 and a rear cover 22 , and the front cover 21 and the rear cover 22 are connected in a detachable manner, such as a snap connection, to improve assembly efficiency.

[0061] As an optional implementation, the push spring 3 is a compression spring, and the direction of its elastic force is coaxial with the sliding direction of the reset button 1 .

[0062] Optionally, the push spring 3 can also be a tension spring or other form of spring, as long as this type of spring can adapt to the purpose of use of this embodiment: when the blocking block 52 releases the limit block 10, the spring can provide an elastic force to make the reset button 1 pop up. The specific type of spring is not specifically limited here.

[0063] As an optional embodiment, the module base 2 is provided with a first limiting slot and a second limiting slot, wherein the reset button 1 is slidably disposed in the first limiting slot, and the test button 8 is slidably disposed in the second limiting slot. The provision of the first limiting slot and the second limiting slot respectively limits the sliding directions of the reset button 1 and the test button 8.

[0064] As an optional embodiment, a circuit board is further included that is fixedly disposed within the housing 100, and the microswitch 4 is soldered to and electrically connected to the circuit board. In this embodiment, soldering the microswitch 4 can avoid the risk of loosening due to vibration. Alternatively, the microswitch 4 can be fixed to the housing 100 or the module base 2 and electrically connected to the circuit board via a wire.

[0065] As an optional embodiment, the housing 100 is provided with a first hole and a second hole, at least a portion of the reset button 1 is exposed through the first hole, and at least a portion of the test button 8 is exposed through the second hole.

[0066] Optionally, the module base 2 is connected to the shell 100 by snap-fit ​​connection. In this way, the main components of the leakage trip module can be assembled first, and then the whole module can be snap-fitted and installed on the shell 100, so as to reduce the difficulty of product assembly and improve assembly efficiency.

[0067] It should be noted that the connection method between the module base 2 and the housing 100 is not specifically limited, and can be screw connection, gluing connection, riveting, etc., or even the two can be integrally formed, as long as the assembly purpose is achieved.

[0068] As an optional embodiment, when the test button 8 is pressed, the micro switch 4 is driven to be turned on, generating a simulated leakage signal which is transmitted to the leakage release 7 .

[0069] As another embodiment of the present invention, Figure 1 and Figure 2 As shown, a leakage trip module is provided, which is applied to a circuit breaker and includes a module base 2 and further includes:

[0070] A reset button 1 is slidably connected to the module base 2, and a limit block 10 extending outward is provided at the bottom end of the reset button 1;

[0071] The push spring 3 has two ends respectively abutting against the module base 2 and the reset button 1;

[0072] A test button 8 is slidably connected to the module base 2;

[0073] A fixed micro switch 4, whose contact abuts against the bottom of the test button 8;

[0074] A fixed leakage release 7;

[0075] A push rod 5 hingedly connected to the module base 2 has a first movable end 51 and a second movable end, wherein the second movable end is bent to form a blocking block 52 that cooperates with the limiting block 10;

[0076] An electrically operated linkage member 6 hinged to the module base 2 includes a body 60 and a first connecting rod 61 and a second connecting rod 62 extending from the body 60 . The first connecting rod 61 is adapted to be positioned with the first movable end 51 , and the second connecting rod 62 is adapted to be connected to the locking mechanism 200 of the circuit breaker.

[0077] The torsion spring 9 has two ends respectively abutting against the module base 2 and the push rod 5;

[0078] In which, the push rod 5 has at least a first position and a second position; when the push rod 70 of the leakage release 7 is not pushed out, the push rod 5 is in the first position, and the blocking block 52 limits the limiting block 10 of the reset button 1; when the push rod 70 of the leakage release 7 is pushed out, the push rod 5 rotates to the second position to release the limiting block 52, and the reset button 1 pops out under the action of the push spring 3.

[0079] In this embodiment, when the test button 8 presses the micro switch 4, a simulated leakage signal is generated to trigger the leakage release 7;

[0080] When the push rod 70 of the leakage release 7 is pushed out, the push rod 5 is driven to rotate around the hinge axis, so that the blocking block 52 releases the blockage of the limit block 10 of the reset button 1, and the reset button 1 pops out under the action of the push spring 3. At the same time, the first movable end 51 of the push rod 5 pushes the first connecting rod 61 of the electric operation linkage 6, triggering the locking mechanism 200 to open the circuit breaker through the second connecting rod 62.

[0081] Optionally, a mounting groove is provided at the bottom of the reset button 1 , and the push spring 3 is provided in the mounting groove, with both ends of the push spring 3 respectively abutting against the module base 2 and the reset button 1 .

[0082] It should be noted that the leakage release 7 and the micro switch 4 in this embodiment are standard products in the industry and can be purchased directly from the open market. The specific model, brand and parameters can be determined according to the requirements of the application scenario and will not be repeated here.

[0083] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0084] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A leakage trip module, applied to a circuit breaker, comprising a module base (2), characterized in that: Also includes: A reset button (1) is slidably connected to the module base (2), and a limit block (10) extending outward is provided at the bottom end of the reset button (1); A push spring (3), two ends of which respectively abut against the module base (2) and the reset button (1); A test button (8) is slidably connected to the module base (2); A fixed micro switch (4) whose contact abuts against the bottom of the test button (8); A fixedly arranged leakage release (7); A push rod (5) hingedly connected to the module base (2), comprising a first movable end (51) and a second movable end, wherein the second movable end is bent to form a blocking block (52) that cooperates with the limiting block (10); An electrically operated linkage member (6) hinged to the module base (2) comprises a body (60) and a first connecting rod (61) and a second connecting rod (62) extending from the body (60), wherein the first connecting rod (61) is adapted to be positioned with the first movable end (51), and the second connecting rod (62) is adapted to be connected to a locking mechanism (200) of a circuit breaker; a torsion spring (9), with two ends respectively contacting the module base (2) and the push rod (5); The push rod (5) has at least a first position and a second position; when the top rod (70) of the leakage release (7) is not pushed out, the push rod (5) is in the first position, and the blocking block (52) limits the limiting block (10) of the reset button (1); when the top rod (70) of the leakage release (7) is pushed out, the push rod (5) rotates to the second position to release the limiting block (52), and the reset button (1) pops out under the action of the push spring (3).

2. The leakage trip module according to claim 1, characterized in that: The push rod (5) and the electric-operated linkage member (6) have overlapping hinge centers.

3. The leakage trip module according to claim 1, characterized in that: When the push rod (5) is in the first position, the upper side surface (11) of the limit block (10) abuts against the lower side surface (53) of the blocking block (52); when the push rod (5) is in the second position, the outer side surface (12) of the limit block (10) abuts against the front side surface (54) of the blocking block (52).

4. The leakage trip module according to claim 1, characterized in that: When the push rod (5) rotates to the second position, its first movable end (51) pushes the first connecting rod (61) of the electric operating linkage (6), triggering the locking mechanism (200) of the circuit breaker to open the circuit breaker through the second connecting rod (62).

5. The leakage trip module according to claim 1, characterized in that: The push spring (3) is a compression spring, and the direction of its elastic force is coaxial with the sliding direction of the reset button (1).

6. The leakage trip module according to claim 1, characterized in that: The module base (2) is provided with a first limiting slide groove and a second limiting slide groove, wherein the reset button (1) is slidably arranged in the first limiting slide groove, and the test button (8) is slidably arranged in the second limiting slide groove.

7. A circuit breaker for leakage protection, comprising a housing (100) and a locking mechanism (200), characterized in that: It also includes the leakage trip module according to any one of claims 1 to 6, wherein the module base (2) of the leakage trip module is fixedly installed in the housing (100); Wherein, the second connecting rod (62) of the electric-operated linkage member (6) is connected to the locking mechanism (200), and: When the test button (8) presses the micro switch (4), a simulated leakage signal is generated to trigger the leakage release (7); When the push rod (70) of the leakage release (7) is pushed out, the push rod (5) is driven to rotate around the hinge axis, so that the blocking block (52) releases the blocking of the limit block (10) of the reset button (1), and the reset button (1) pops out under the action of the push spring (3). At the same time, the first movable end (51) of the push rod (5) pushes the first connecting rod (61) of the electric operating linkage (6), and triggers the locking mechanism (200) to open the switch through the second connecting rod (62).

8. The circuit breaker according to claim 7, wherein: It also includes a circuit board fixedly arranged in the housing (100), and the micro switch (4) is welded on the circuit board and electrically connected to the circuit board.

9. The circuit breaker according to claim 7, wherein: The housing (100) is provided with a first hole and a second hole, at least a portion of the reset button (1) is exposed through the first hole, and at least a portion of the test button (8) is exposed through the second hole.

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