Operating mechanism and circuit breaker
By setting a protrusion on the outer surface of the lever as the lock matching surface, and combining the stop surface and the avoidance gap, the problem of difficulty in matching the lever and the lock is solved, and the reliability and timely tripping effect of the circuit breaker are achieved.
Patent Information
- Application Number
- CN202422491308.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-15
AI Technical Summary
In the prior art, it is difficult to match the lever with the lock, which can easily lead to slippage or deadlock, affecting the reliability of the operating mechanism.
A protrusion is set on the outer surface of the lever as the lock mating surface, and the lock and the lever are mated in an outward-facing manner. By setting structures such as stop surfaces and avoidance gaps, the precise mating of the lock and the lever is ensured.
The matching accuracy between the lever and the lock is improved to avoid accidental slippage, ensure timely tripping when residual current occurs, and improve the reliability of the circuit breaker.
Smart Images
Figure CN223378107U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an operating mechanism and a circuit breaker. Background Art
[0002] Residual current operated circuit breakers can quickly cut off faulty power in a very short time, protecting the safety of people and electrical equipment, and are therefore widely used. Residual current operated circuit breakers include an operating mechanism, a contact system, and a tripping mechanism. The operating mechanism includes a handle, a swinging member connected to the handle, a lock linked to the swinging member, and a lever that can overlap with the lock. The contact system includes a moving contact and a static contact, and the moving contact is connected to the swinging member. When the operating mechanism is working normally, the lock overlaps with the lever, and the user operates the handle to make the swinging member drive the moving contact to contact or separate from the static contact, thereby achieving opening and closing. When a residual current fault occurs, the tripping mechanism operates and pushes the lever, causing the lock to trip the lever, and then the swinging member linked to the lock drives the moving contact to separate from the static contact, thereby achieving circuit protection.
[0003] like Figure 1 and Figure 2 As shown, the first end 111′ of the lever 11′ is used to directly or indirectly cooperate with the current protection device, and the second end 112′ is used to install an elastic member that can reset it. In order to ensure that the lock 12′ can overlap with the lever 11′, a groove 113′ is usually opened on the lever 11′, and the lock 12′ overlaps the bottom surface of the groove 113′ to obtain a limit. When the tripping mechanism is activated and pushes the lever 11′, the lever 11′ rotates around its axis and moves upward relative to the lock 12′, and the lock 12′ is disengaged from the lever 11′. Since the lever 11′ is usually formed by injection molding, and the molding of the groove 113′ is relatively difficult, it is difficult to control the inclination angle of the surface used to overlap with the lock 12′. If the molding accuracy is not enough, it is easy to cause the lock 12′ to slip or get stuck, thereby affecting the reliability of the operating mechanism. Utility Model Content
[0004] One purpose of the utility model is to provide an operating mechanism that can avoid accidental slipping and can also ensure timely tripping when residual current occurs, with high reliability.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] Operating mechanism, including:
[0007] A lever is rotatable about a first axis and includes a main body, a protrusion is provided on an outer surface of the main body, and the protrusion has a first surface;
[0008] The lock catch is capable of rotating around a second axis, wherein the second axis and the first axis are both parallel to a first direction, and the lock catch includes a lap portion, which can overlap on the first surface or rotate relative to the lever along a first rotational direction to separate from the first surface.
[0009] As an optional solution, the protrusion further includes a second surface, the second surface intersecting with the first surface, the first surface and the second surface are arranged along the first rotation direction, and the second surface is configured to prevent the overlapping portion from rotating along the second rotation direction.
[0010] As an optional solution, the angle between the second surface and the first surface is an obtuse angle.
[0011] As an optional solution, an avoidance notch is further provided on the main body, the avoidance notch and the first surface are arranged along the first rotation direction, and the avoidance notch is configured to avoid the overlapping portion from rotating along the first rotation direction.
[0012] As an optional solution, a mating surface, a connecting surface and a guiding surface are provided on the overlapping portion, the mating surface is used to abut against the first surface, the connecting surface connects the mating surface and the guiding surface, and the guiding surface is configured to cooperate with the bottom surface of the avoidance gap to guide the lock to rotate along the second rotation direction.
[0013] As an optional solution, a first inclined surface and a second inclined surface are respectively provided on both sides of the overlapping portion along the first direction, and the first inclined surface and the second inclined surface gradually approach each other in a direction approaching the lever.
[0014] As an optional solution, the lever is integrally injection molded; and / or
[0015] The lock buckle is integrally injection-molded.
[0016] As an optional solution, the matching width between the overlapping portion and the first surface is no more than 5 mm.
[0017] As an optional solution, the operating mechanism also includes a handle, a swinging member and a trip latch, the handle has a closing position and an opening position, the swinging member is linked to the handle and is used to install the moving contact, and the swinging member is linked to the lock latch through the trip latch.
[0018] Another object of the present invention is to provide a circuit breaker that, by adopting the above-mentioned operating mechanism, can avoid accidental slippage and can also ensure timely tripping when residual current occurs, thereby having high reliability.
[0019] To achieve this purpose, the present invention adopts the following technical solutions:
[0020] The circuit breaker includes a contact mechanism, a tripping mechanism and the operating mechanism. The contact mechanism includes a static contact and a moving contact. The moving contact is linked to the lock. The tripping mechanism is linked to the lever and can separate the overlapping portion from the first surface.
[0021] The beneficial effects of the utility model are:
[0022] In the operating mechanism of the present invention, the lock catch can be overlapped on the first surface of the lever. When the tripping mechanism is activated and drives the lever to rotate around the first axis along the first rotation direction, the lock catch is disengaged from the lever. At this time, the lock catch rotates around the second axis and the moving contact and the corresponding static contact linked thereto are separated, thereby realizing residual current protection. Since the first surface is a raised surface, and the raised surface is located on the outer surface of the main body, that is, the first surface for cooperating with the lock catch is the outer surface of the lever, that is, the mating surface between the lever and the lock catch is "outward-facing", thereby greatly reducing the manufacturing difficulty of the first surface, and thus facilitating ensuring the mating accuracy between the lever and the lock catch, which can not only avoid accidental slippage, but also ensure timely tripping when residual current occurs, and has high reliability.
[0023] The circuit breaker of the present invention can avoid accidental slipping by adopting the above-mentioned operating mechanism, and can also ensure timely tripping when residual current occurs, thereby having high reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the lever and lock provided by the prior art;
[0025] Figure 2 It is a structural diagram of a lever provided by the prior art;
[0026] Figure 3 It is a structural diagram of a circuit breaker provided by a specific embodiment of the utility model;
[0027] Figure 4 This is a partial structural diagram of a circuit breaker provided in a specific embodiment of the utility model;
[0028] Figure 5 This is a schematic diagram of a lever and a lock provided by a specific embodiment of the present invention from a first perspective in a mating state;
[0029] Figure 6 This is a schematic diagram of a lever and a lock provided by a specific embodiment of the present invention from a second perspective in a mating state;
[0030] Figure 7 It is a structural diagram of a lever provided in a specific embodiment of the utility model;
[0031] Figure 8It is a structural diagram of a lock provided by a specific embodiment of the utility model;
[0032] Figure 9 It is a schematic diagram of a third perspective of the lever and the lock provided by a specific embodiment of the present invention in the mating state.
[0033] In the picture:
[0034] 11′, lever; 111′, first end; 112′, second end; 113′, groove; 12′, lock;
[0035] 10. Operating mechanism; 101. First axis; 102. Second axis;
[0036] 11. Lever; 111. Main body; 112. Protrusion; 1121. First surface; 1122. Second surface; 1123. Avoidance notch; 113. Mounting portion; 114. Linkage portion;
[0037] 12. Locking buckle; 121. Overlapping portion; 1211. Mating surface; 1212. Connecting surface; 1213. Guide surface; 1214. First inclined surface; 1215. Second inclined surface;
[0038] 13. Handle; 14. Swinging piece; 141. Connecting hole; 15. Jump buckle; 16. U-shaped linkage;
[0039] 20. Base; 21. Base body; 22. Support frame;
[0040] 30. Cover. DETAILED DESCRIPTION
[0041] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0042] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0044] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0045] This embodiment provides an operating mechanism and a circuit breaker, such as Figure 3 and Figure 4 As shown, the circuit breaker includes a base 20, a cover 30, an operating mechanism 10, a contact mechanism and a trip mechanism. A mounting cavity is formed between the base 20 and the cover 30, and the contact mechanism, the trip mechanism and at least part of the operating mechanism 10 are mounted in the mounting cavity.
[0046] like Figure 4 As shown, the base 20 includes a base body 21 and a support frame 22 extending from the base body 21 toward the inner side of the cover 30, and the operating mechanism 10 is mounted on the support frame 22. Specifically, the operating mechanism 10 includes a handle 13, a U-shaped linkage 16 and a swing member 14. Among them, the handle 13 is mounted on the support frame 22 and has a closing position and an opening position. The swing member 14 is mounted on the support frame 22 and can rotate relative to the support frame 22 around an axis parallel to the first direction. The swing member 14 is linked to the handle 13 through the U-shaped linkage 16. The contact mechanism includes a moving contact and a static contact. The static contact is mounted on the base 20, and the moving contact is connected to the swing member 14. The operator can switch the handle 13 between the closing position and the opening position by rotating the handle 13. During this process, the swing member 14 moves in conjunction and drives the moving contact to contact or separate with the static contact, thereby realizing the closing and opening of the circuit breaker.
[0047] In this embodiment, the U-shaped linkage 16 includes two parallel rods, one of which is connected to the handle 13, and the other is connected to the swing member 14. Specifically, the swing member 14 is provided with a connecting hole 141, which includes an inclined long hole and a vertical long hole that are interconnected and arranged at an angle. The other rod of the U-shaped linkage 16 is inserted into the connecting hole 141 and can slide within the connecting hole 141, so that the swing member 14 can move simultaneously when the handle 13 is rotated.
[0048] Furthermore, if Figure 4 and Figure 5 As shown, the operating mechanism 10 also includes a trip latch 15, a lock latch 12, a lever 11 and a push rod (obscured in the figure). The trip latch 15, the lock latch 12 and the lever 11 are all rotatably mounted on the support frame 22, and each is equipped with a return spring. Specifically, the lever 11 can rotate relative to the support frame 22 around the first axis 101, and the lock latch 12 can rotate relative to the support frame 22 around the second axis 102, and the first axis 101 and the second axis 102 are both parallel to the first direction. The two ends of the trip latch 15 can respectively abut and cooperate with the U-shaped linkage 16 and the lock latch 12. The lock latch 12 has a lap joint 121, which can abut or separate from the lever 11. The trip mechanism is linked to the lever 11 through the push rod. In this embodiment, the circuit breaker is a residual current operated circuit breaker, and the trip mechanism corresponds to an electromagnetic relay. In other embodiments, the type of circuit breaker is not specifically limited, and accordingly, the trip mechanism can include an electromagnetic relay, a bimetallic strip, etc.
[0049] In this embodiment, the first rotation direction and the second rotation direction represent two opposite rotation directions. The following is an introduction taking the first rotation direction as the counterclockwise direction and the second rotation direction as the clockwise direction as an example. The general working principle of the circuit breaker is as follows: when the handle 13 is switched from the open position to the closed position, the handle 13 drives the U-shaped linkage 16 to move, and one end of the trip latch 15 overlaps with the lock latch 12 and abuts against the insertion rod of the U-shaped linkage 16, so that the insertion rod is limited in the inclined long hole. Under the action of the U-shaped linkage 16, the trip latch 15 drives the lock latch 12 to overlap with the lever 11, so that the handle 13 remains in the closed position. When there is a leakage current, the top rod of the tripping mechanism pushes the push rod, which in turn links with the lever 11, causing the lever 11 to rotate counterclockwise around the first axis 101. The lock catch 12 loses its connection with the lever 11, which in turn causes the trip catch 15 to separate from the lock catch 12. The trip catch 15 changes position after losing the support of the lock catch 12, and the insertion rod of the U-shaped linkage 16 loses the support force of the trip catch 15 and is able to enter the vertical long hole. The swinging member 14 can rotate under the action of its reset spring to disengage the moving contact and the static contact, thereby achieving residual current protection. After the lock catch 12 is disengaged from the lever 11, the trip catch 15, the lock catch 12, and the lever 11 are reset under the action of their respective reset springs, and the lock catch 12 and the lever 11 rotate clockwise to reconnect.
[0050] Since the shapes of the lever 11 and the lock catch 12 are relatively complex, in this embodiment, the lever 11 and the lock catch 12 are integrally injection molded, thereby improving the manufacturing efficiency of both.
[0051] In the prior art, such as Figure 1 and Figure 2 As shown, a groove 113′ is provided on the lever 11′, and the lock buckle 12′ is overlapped on the bottom surface of the groove 113′ to obtain a limit position. The injection molding of the groove 113′ is difficult, so it is difficult to control the inclination angle of the surface of the groove 113′ for overlapping with the lock buckle 12′. If the molding accuracy is not enough, it is easy to cause the lock buckle 12′ to slip or become locked, thereby affecting the reliability of the operating mechanism.
[0052] In this regard, Figure 5-Figure 7As shown, the lever 11 includes a main body 111, on the outer surface of which a protrusion 112 is provided. The protrusion 112 has a first surface 1121. The overlapping portion 121 of the lock catch 12 can overlap the first surface 1121 or rotate counterclockwise relative to the lever 11 to separate from the first surface 1121. In this embodiment, since the first surface 1121 is the surface of the protrusion 112, and the protrusion 112 is located on the outer surface of the main body 111, that is, the first surface 1121 for mating with the lock catch 12 is the outer surface of the lever 11. In other words, the mating surface 1211 between the lever 11 and the lock catch 12 is "outward-facing." This greatly reduces the manufacturing difficulty of the first surface 1121, thereby facilitating the mating precision between the lever 11 and the lock catch 12. This prevents accidental slippage and ensures timely tripping in the event of residual current (avoiding deadlocking), thereby improving the reliability of the circuit breaker.
[0053] like Figure 7 As shown, the lever 11 also includes a mounting portion 113 and a linkage portion 114, which are respectively connected to the two ends of the main body 111 along the first direction. The mounting portion 113 is used to install a reset spring that can drive the lever 11 to reset, and the linkage portion 114 is used to cooperate with the push rod.
[0054] In this embodiment, the mating width between the overlapping portion 121 and the first surface 1121 is no greater than 5 mm. This arrangement minimizes the mating surface 1211 between the lock catch 12 and the lever 11. Consequently, when the trip mechanism actuates the lever 11, the friction between the lever 11 and the lock catch 12 is minimal, allowing the two to smoothly trip, achieving residual current protection and improving the reliability of the circuit breaker. Alternatively, the mating width between the overlapping portion 121 and the first surface 1121 can be 5 mm, 4.5 mm, 4 mm, etc., without specific limitation herein.
[0055] In order to ensure that the lock 12 and the lever 11 are positioned accurately, Figure 5 and Figure 7 As shown, protrusion 112 further includes a second surface 1122, which intersects with first surface 1121. First surface 1121 and second surface 1122 are arranged in a counterclockwise direction. Second surface 1122 can prevent clockwise rotation of overlapping portion 121. Specifically, when lock catch 12 is reset in the clockwise direction, second surface 1122 stops overlapping portion 121, ensuring that lock catch 12 is locked in the appropriate position, thereby ensuring that lock catch 12 can be smoothly disengaged from lever 11 in the event of a current fault.
[0056] like Figure 7As shown, the angle between the second surface 1122 and the first surface 1121 is an obtuse angle. This configuration not only ensures the stopping effect of the second surface 1122, but also further reduces the manufacturing difficulty of the lever 11. Optionally, the angle between the first surface 1121 and the second surface 1122 can be 100°, 105°, 110°, 115°, 120°, etc., which is not specifically limited here.
[0057] like Figure 6 and Figure 7 As shown, an avoidance notch 1123 is further provided on the main body 111. The avoidance notch 1123 and the first surface 1121 are arranged in a counterclockwise direction. When the lever 11 and the lock catch 12 are disengaged and the lock catch 12 rotates counterclockwise relative to the lever 11, the avoidance notch 1123 can avoid the overlapping portion 121. Such a setting can make the structure of the operating mechanism 10 more compact while ensuring the overall structural strength of the lever 11, which is conducive to the miniaturization design of the circuit breaker.
[0058] like Figure 6-Figure 8 As shown, the overlapping portion 121 is provided with a mating surface 1211, a connecting surface 1212, and a guide surface 1213. The mating surface 1211 is used to abut the first surface 1121. The connecting surface 1212 connects the mating surface 1211 and the guide surface 1213. The guide surface 1213 is configured to mate with the bottom surface of the avoidance notch 1123. The provision of the guide surface 1213 makes the clockwise resetting process of the lock catch 12 smoother, thereby minimizing unnecessary wear between the lever 11 and the lock catch 12 and improving the service life of the circuit breaker. In this embodiment, the guide surface 1213 is a circular arc surface. In other embodiments, the guide surface 1213 can also be a non-standard circular arc, as long as it is a smooth arc surface.
[0059] like Figure 9 As shown, the lap joint 121 is provided with a first inclined surface 1214 and a second inclined surface 1215 on either side of the first direction. The first inclined surface 1214 and the second inclined surface 1215 gradually approach each other as they approach the lever 11. The provision of the first inclined surface 1214 and the second inclined surface 1215 can, on the one hand, further reduce the area of engagement between the lap joint 121 and the first surface 1121. Consequently, when the trip mechanism drives the lever 11 to operate, the friction between the lever 11 and the lock 12 is reduced, allowing for smooth tripping and improving the reliability of the circuit breaker. Furthermore, a certain gap is formed between the lap joint 121 and other structures on the lever 11 on either side of the first direction, thereby preventing interference between the lap joint 121 and these other structures during rotation, which could lead to loss of function and further improving the reliability of the circuit breaker.
[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will, based on the concept of the present invention, vary the specific implementation methods and scope of application, and the contents of this specification should not be construed as limiting the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. Operating mechanism, characterized in that, include: A lever (11) is rotatable about a first axis (101) and comprises a main body (111), a protrusion (112) being provided on an outer surface of the main body (111), and the protrusion (112) having a first surface (1121); The lock catch (12) is capable of rotating about a second axis (102), wherein the second axis (102) and the first axis (101) are both parallel to a first direction, and the lock catch (12) includes a lap portion (121), wherein the lap portion (121) is capable of lap-jointing the first surface (1121), or rotating relative to the lever (11) along a first rotational direction to separate from the first surface (1121).
2. The operating mechanism according to claim 1, wherein: The protrusion (112) further includes a second surface (1122), the second surface (1122) intersecting with the first surface (1121), the first surface (1121) and the second surface (1122) being arranged along a first rotational direction, and the second surface (1122) being configured to prevent the overlapping portion (121) from rotating along a second rotational direction.
3. The operating mechanism according to claim 2, wherein: The angle between the second surface (1122) and the first surface (1121) is an obtuse angle.
4. The operating mechanism according to claim 1, wherein: The main body (111) is further provided with an avoidance notch (1123), the avoidance notch (1123) and the first surface (1121) are arranged along a first rotation direction, and the avoidance notch (1123) is configured to avoid the overlapping portion (121) from rotating along the first rotation direction.
5. The operating mechanism according to claim 4, characterized in that: The overlapping portion (121) is provided with a mating surface (1211), a connecting surface (1212) and a guiding surface (1213); the mating surface (1211) is used to abut against the first surface (1121); the connecting surface (1212) connects the mating surface (1211) and the guiding surface (1213); the guiding surface (1213) is configured to cooperate with the bottom surface of the avoidance notch (1123) to guide the lock buckle (12) to rotate along the second rotation direction.
6. The operating mechanism according to claim 1, wherein: The overlapping portion (121) is provided with a first inclined surface (1214) and a second inclined surface (1215) on both sides along the first direction, respectively. In the direction approaching the lever (11), the first inclined surface (1214) and the second inclined surface (1215) gradually approach each other.
7. The operating mechanism according to any one of claims 1 to 6, characterized in that: The lever (11) is integrally injection molded; and / or The lock buckle (12) is integrally injection-molded.
8. The operating mechanism according to any one of claims 1 to 6, characterized in that: The matching width between the overlapping portion (121) and the first surface (1121) is no greater than 5 mm.
9. The operating mechanism according to any one of claims 1 to 6, characterized in that: The operating mechanism further comprises a handle (13), a swinging member (14) and a tripping latch (15); the handle (13) has a closing position and an opening position; the swinging member (14) is linked to the handle (13) and is used to install a moving contact; the swinging member (14) is linked to the lock latch (12) via the tripping latch (15).
10. A circuit breaker, characterized in that It comprises a contact mechanism, a tripping mechanism and an operating mechanism according to any one of claims 1 to 9, wherein the contact mechanism comprises a static contact and a moving contact, the moving contact is linked to the lock (12), the tripping mechanism is linked to the lever (11), and can separate the overlapping portion (121) from the first surface (1121).