Manual operation mechanism and molded case circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage circuit breakers, and discloses a manual operation mechanism and a molded case circuit breaker. The manual operation mechanism comprises a base, a coupling assembly and a rotary handle, wherein the handle device is connected with the base through a coupling shaft; the coupling assembly is arranged on the base, the coupling assembly and the base form the containing space capable of being tightly matched with the coupling shaft, and the coupling shaft is partially inserted into the containing space, so that the coupling shaft can be inserted into different depths according to actual application scenes during installation so as to meet different transmission requirements; transmission can be smoothly realized, and application scenes of switch cabinets with different sizes can be adapted; the connecting shaft does not need to be fixed to the base through a screw, the depth of the connecting shaft cannot be adjusted, the connecting shaft can be directly drawn out of the containing space, and therefore the replacement process is simplified, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage circuit breakers, in particular to a manual operating mechanism and a molded case circuit breaker. Background Art

[0002] Low-voltage circuit breakers are mainly used in AC and DC low-voltage power grids. They can manually or electrically open and close circuits, and can protect circuits or electrical equipment from overload, short circuit, and undervoltage. For example, molded case circuit breakers can automatically cut off the current after the current exceeds the trip setting. Low-voltage circuit breakers usually need to be equipped with a manual operating mechanism, and the rotating handle of the manual operating mechanism is used to manually close and open the low-voltage circuit breaker from outside the switch cabinet.

[0003] In the prior art, the rotary handle of the manual operating mechanism includes a connecting shaft and a handle device. The two ends of the connecting shaft are connected to the handle and the handle device of the low-voltage circuit breaker by radially penetrating screws respectively. The length of the connecting shaft is fixed and cannot be adjusted, which makes it difficult to adapt to switch cabinets of different sizes. Once the length of the connecting shaft is slightly inappropriate, the screws need to be removed and replaced with a connecting shaft of different specifications for reinstallation, which is cumbersome and inefficient.

[0004] That is, the connecting shaft of the existing manual operating mechanism has a fixed length and cannot be adjusted. Once it is slightly incompatible, the connecting shaft needs to be replaced and reinstalled. It has the disadvantages of being difficult to adapt to different application scenarios, and the connecting shaft replacement procedures are cumbersome and inefficient. Utility Model Content

[0005] The purpose of the utility model is to provide a manual operating mechanism and a molded case circuit breaker to solve the problem that the length of the connecting shaft of the existing manual operating mechanism is fixed and cannot be adjusted. Once there is a slight mismatch, the connecting shaft needs to be replaced and reinstalled, which is difficult to adapt to different application scenarios, and the connecting shaft replacement steps are cumbersome and inefficient.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a manual operating mechanism, which comprises:

[0008] A base, used to match the handle of a low-voltage circuit breaker;

[0009] A connecting assembly connected to the base and enclosed with the base to form a receiving space;

[0010] The rotary handle comprises a connecting shaft and a handle device, wherein one end of the connecting shaft is inserted into the accommodation space and the part inserted into the accommodation space is tightly matched with the accommodation space, and the other end of the connecting shaft is connected to the handle device.

[0011] As an optional technical solution for a manual operating mechanism, the connecting assembly includes a first connecting member, the first connecting member is connected to the base, the accommodating space includes a first through hole arranged on the first connecting member, and the connecting shaft is inserted into the first through hole and tightly fits with the first through hole.

[0012] As an optional technical solution for a manual operating mechanism, the accommodating space also includes a second through hole arranged on the base, the second through hole is connected to the first through hole, the connecting shaft passes through the first through hole and is inserted into the second through hole, and the connecting shaft is tightly fitted with the second through hole.

[0013] As an optional technical solution of a manual operating mechanism, a reinforcing protrusion is provided on the first connecting member, and the reinforcing protrusion is arranged around the edge of the first penetration hole.

[0014] As an optional technical solution of a manual operating mechanism, the first connecting member is in the shape of a plate, a positioning groove is provided on the base, and the first connecting member is at least partially embedded in the positioning groove and is detachably connected to the base.

[0015] As an optional technical solution for a manual operating mechanism, the coupling assembly further includes a first fastener, which passes through the base and has an end portion fixed to the first coupling member.

[0016] As an optional technical solution for a manual operating mechanism, the connecting assembly includes a locking member and at least two second connecting members connected to the base, the two second connecting members are arranged at intervals and form the accommodating space with the base, and the locking member connects the two second connecting members so that the connecting shaft fits tightly with the accommodating space.

[0017] As an optional technical solution for a manual operating mechanism, each of the second connecting members is provided with a V-shaped groove, and the two V-shaped grooves are surrounded by the base to form the accommodating space. The connecting shaft is square and the outer side surface of the connecting shaft is in contact with the wall of the V-shaped groove.

[0018] As an optional technical solution of a manual operating mechanism, the second connecting member includes:

[0019] A support portion connected to the base;

[0020] The clamping portion is connected to the supporting portion at an angle, the V-shaped groove is arranged on the clamping portion, and the V-shaped groove is recessed toward a side where the supporting portion is arranged.

[0021] The utility model provides a molded case circuit breaker, which comprises the manual operating mechanism.

[0022] Beneficial effects:

[0023] The utility model provides a manual operating mechanism, which comprises a base, a coupling assembly and a rotating handle, wherein the base is used to match a handle of a low-voltage circuit breaker, the coupling assembly is connected to the base and encloses the base to form a receiving space, the rotating handle comprises a coupling shaft and a handle device, and the handle device and the base are connected through the coupling shaft; by arranging the coupling assembly on the base, the coupling assembly and the base form a receiving space that can be closely matched with the coupling shaft, the coupling shaft is partially inserted into the receiving space, so that when the coupling shaft is installed, different depths can be inserted according to actual application scenarios to adapt to different transmission requirements, and when the coupling shaft forms a close match with the receiving space, the transmission can be smoothly realized to adapt to application scenarios of switch cabinets of different sizes; it is no longer necessary to fix the coupling shaft on the base with screws, so that the coupling shaft cannot be adjusted in depth, and the coupling shaft can be directly drawn out from the receiving space, thereby simplifying the replacement process and improving efficiency.

[0024] The utility model provides a molded case circuit breaker, which comprises the above-mentioned manual operating mechanism, wherein the handle device and the base of the manual operating mechanism are connected through a connecting shaft, and manual closing and opening control operations can be performed, and when the length of the connecting shaft is slightly inappropriate, the insertion depth of the connecting shaft can be adjusted, thereby effectively improving the applicability and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the manual operating mechanism provided in the first embodiment of the utility model;

[0026] Figure 2 This is a partial structural diagram of the manual operating mechanism provided in the first embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of a base provided in Embodiment 1 of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the first coupling member provided in the first embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of the manual operating mechanism provided in the second embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the base and the second connecting member provided in the second embodiment of the present utility model;

[0031] Figure 7 It is a structural schematic diagram of the second connecting member provided in the second embodiment of the present utility model.

[0032] In the figure:

[0033] 10. base; 11. positioning groove; 12. second penetration hole;

[0034] 20. Rotating handle;

[0035] 21. connecting shaft; 211. radial locking hole;

[0036] 22. Handle device;

[0037] 31. first connecting member; 311. first penetration hole; 312. reinforcement protrusion; 313. first mounting hole;

[0038] 32. Second connecting member; 321. Clamping portion; 3211. V-shaped groove; 322. Supporting portion. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] Embodiment 1

[0044] like Figures 1 to 4 As shown, on one hand, this embodiment provides a manual operating mechanism, which includes a base 10, a connecting assembly and a rotating handle 20. The base 10 is used to cooperate with the handle of the low-voltage circuit breaker. The connecting assembly is connected to the base 10, and the connecting assembly and the base 10 enclose a receiving space; the rotating handle 20 includes a connecting shaft 21 and a handle device 22. One end portion of the connecting shaft 21 is inserted into the receiving space and the portion inserted into the receiving space is tightly matched with the receiving space. The other end of the connecting shaft 21 is connected to the handle device 22.

[0045] By arranging a coupling assembly on the base 10, the coupling assembly and the base 10 form a receiving space that can closely fit with the coupling shaft 21. The coupling shaft 21 is partially inserted into the receiving space, so that the coupling shaft 21 can be inserted into different depths according to the actual application scenarios during installation to adapt to different transmission requirements. When the coupling shaft 21 closely fits with the receiving space, the transmission can be smoothly realized to adapt to the application scenarios of switch cabinets of different sizes. It is no longer necessary to fix the coupling shaft 21 on the base 10 with screws, which makes it impossible to adjust the depth of the coupling shaft 21, and the coupling shaft 21 can be directly pulled out from the receiving space, thereby simplifying the replacement process and improving efficiency.

[0046] Among them, the coupling shaft 21 is tightly matched with the accommodating space, which means that after the coupling shaft 21 is inserted into the accommodating space, it can form a surface contact with the accommodating space to achieve transmission. For example, when the cross section of the coupling shaft 21 is circular, the outer peripheral surface of the coupling shaft 21 can be interference-fitted with the accommodating space, so that the outer peripheral surface and the inner wall of the accommodating space are tightly pressed to achieve transmission; when the cross section of the coupling shaft 21 is triangular, at least two adjacent outer walls of the coupling shaft 21 can be tightly pressed against the inner wall of the accommodating space; when the cross section of the coupling shaft 21 is polygonal, at least two opposite outer walls of the coupling shaft 21 can be tightly pressed against the inner wall of the accommodating space, and the remaining outer walls can leave a gap with the inner wall of the accommodating space. During installation, the depth of the coupling shaft 21 inserted into the accommodating space is determined according to actual needs and forms a tight fit with the accommodating space, which can meet the length requirements of the coupling shaft 21 for switch cabinets of different sizes; when replaced, the coupling shaft 21 can be pulled out of the accommodating space.

[0047] Specifically, the coupling assembly includes a first coupling member 31, the first coupling member 31 is connected to the base 10, the accommodation space includes a first through hole 311 provided on the first coupling member 31, and the coupling shaft 21 is inserted into the first through hole 311 and closely matches the first through hole 311. The first coupling member 31 is connected to the base 10, and the first through hole 311 is provided on the first coupling member 31 as the accommodation space, and the structure is simple and easy to implement.

[0048] Optionally, the first coupling member 31 is plate-shaped, and a positioning groove 11 is provided on the base 10. The first coupling member 31 is at least partially embedded in the positioning groove 11 and is detachably connected to the base 10. By providing a detachable first coupling member 31, the first coupling member 31 and the base 10 can be processed separately, which is convenient for replacing the first coupling member 31; by providing the positioning groove 11 on the base 10, the first coupling member 31 is limited, thereby ensuring the stability of the installation position of the first coupling member 31.

[0049] In order to set the first connecting member 31 on the base 10, the connecting assembly further includes a first fastener, which is passed through the base 10 and the end of which is fixed to the first connecting member 31. By passing the first fastener upward from the bottom of the base 10 and fixing the first fastener on the first connecting member 31, the first fastener does not protrude from the surface of the first connecting member 31.

[0050] In this embodiment, a through hole is provided on the base 10; two first mounting holes 313 are provided on the first coupling member 31, and the two first mounting holes 313 are located at the diagonal positions of the first coupling member 31; the first fastener is inserted into the through hole of the base 10 and is threadedly engaged with the first mounting hole 313. The threaded connection is formed by inserting the first fastener, and the structure is simple and easy to disassemble and assemble; by setting two first mounting holes 313 at the diagonal positions, and using the first fastener to thread and lock the first mounting holes 313, the first coupling member 31 is evenly stressed, and the first fastener is effectively prevented from loosening, which can improve durability and safety. Among them, the first mounting hole 313 can be a through hole, or a blind hole set on the side of the first coupling member 31 facing the base 10. In other embodiments, three or more first mounting holes 313 can also be set; the first mounting holes 313 are all set at the corners of the first coupling member 31; the first coupling member 31 can also be set to snap-fit ​​with the base 10.

[0051] In this embodiment, the base 10 is made of plastic material, and the first coupling member 31 is made of metal material; the first coupling member 31 is rectangular, the positioning groove 11 is a rectangular groove, and the first coupling member 31 is completely embedded in the positioning groove 11; the coupling shaft 21 is a square shaft, and the first through hole 311 is a square through hole; the first fastener is a screw. By setting the first coupling member 31 of metal material, the first coupling member 31 has good strength and hardness, is not easy to deform, and is strong and pressure-resistant; by setting the base 10 of plastic material, it is economical and practical, saves investment costs, and also helps to enrich the appearance of the base 10 and improve market competitiveness.

[0052] It can be understood that the shape and thickness of the first connecting member 31 can be adjusted according to actual needs, and the shape of the positioning groove 11 matches the shape of the first connecting member 31; the cross-sectional shape of the connecting shaft 21 can also be triangular or polygonal, and the shape of the first through hole 311 matches the shape of the connecting shaft 21.

[0053] Optionally, the first coupling member 31 is further provided with a reinforcing protrusion 312, which is arranged around the edge of the first through hole 311. The reinforcing protrusion 312 is provided to increase the contact area between the coupling shaft 21 and the first coupling member 31, thereby improving the stability of the tight fit. In this embodiment, the cross section of the reinforcing protrusion 312 is rectangular, and the reinforcing protrusion 312 is located on the side of the first coupling member 31 away from the positioning groove 11.

[0054] In order to ensure the stability of the transmission between the handle device 22 and the base 10, the accommodating space also includes a second through hole 12 provided on the base 10, the second through hole 12 is communicated with the first through hole 311, the connecting shaft 21 passes through the first through hole 311 and is inserted into the second through hole 12, and the connecting shaft 21 is tightly matched with the second through hole 12. By providing the second through hole 12 on the base 10, the connecting shaft 21 can be inserted into the first connecting member 31 and the base 10 at the same time, so that the connecting shaft 21 directly contacts the base 10, and ensures that the contact area of ​​the connecting shaft 21 is large, so as to improve the stability of the transmission.

[0055] In this embodiment, the second through hole 12 is disposed in the middle of the base 10, and the second through hole 12 is connected to the positioning groove 11; the second through hole 12 is a rectangular blind hole. In other embodiments, the second through hole 12 can also be set to other shapes, as long as the shape of the second through hole 12 matches that of the connecting shaft 21.

[0056] In order to connect the connecting shaft 21 with the handle device 22, the manual operating mechanism also includes a locking piece. A radial locking hole 211 is provided at the end of the connecting shaft 21. The end of the connecting shaft 21 is inserted into the handle device 22. The locking piece is passed through the radial locking hole 211 and the handle device 22 to fix the connecting shaft 21 to the handle device 22.

[0057] The following is the specific installation process of the manual operating mechanism of this embodiment:

[0058] Place the first connecting piece 31 in the positioning groove 11 of the base 10, and pass the screw through the bottom of the base 10 to fix the first connecting piece 31 in the positioning groove 11; then insert the bottom end of the connecting shaft 21 into the first through hole 311 of the first connecting piece 31 and the second through hole 12 of the base 10, and the connecting shaft 21 is tightly matched with the hole walls of the first through hole 311 and the second through hole 12; finally, install the handle device 22 on the top of the connecting shaft 21.

[0059] On the other hand, the present embodiment provides a molded case circuit breaker, which includes the above-mentioned manual operating mechanism. The handle device 22 of the manual operating mechanism is connected to the base 10 through the connecting shaft 21, which can perform manual closing and opening control operations, and the insertion depth of the connecting shaft 21 can be adjusted when the length of the connecting shaft 21 is slightly inappropriate, which effectively improves the applicability and installation efficiency.

[0060] Embodiment 2

[0061] Compared with the first embodiment, the arrangement of the accommodation space and the structure of the connection assembly in this embodiment are different. Figures 5 to 7 As shown, the coupling assembly includes a locking member and two second coupling members 32, both of which are connected to the base 10, and the two second coupling members 32 are arranged at intervals and enclose a receiving space with the base 10, and the locking member connects the two second coupling members 32 so that the coupling shaft 21 is closely matched with the receiving space. By setting two second coupling members 32 arranged at intervals, the two second coupling members 32 and the base 10 jointly enclose a receiving space; the two second coupling members 32 are connected by the locking member so that the coupling shaft 21 is closely matched with the receiving space, which can not only realize the transmission between the base 10 and the handle device 22, but also adjust the insertion depth of the coupling shaft 21 according to actual needs, thereby changing the use length of the coupling shaft 21. In other embodiments, multiple second coupling members 32 may also be provided, and the multiple second coupling members 32 and the base 10 enclose a receiving space.

[0062] Optionally, each second coupling member 32 is provided with a V-shaped groove 3211, the V-shaped groove 3211 and the base 10 are surrounded to form a receiving space, the coupling shaft 21 is square, and the outer side of the coupling shaft 21 is in contact with the groove wall of the V-shaped groove 3211. By providing the V-shaped groove 3211 on the second coupling member 32, the coupling shaft 21 can be clamped, and the relative rotation between the coupling shaft 21 and the second coupling member 32 can be effectively limited. In this embodiment, the two second coupling members 32 are arranged opposite to each other, and the locking member is horizontally penetrated in the two second coupling members 32, and the locking member is a screw.

[0063] Specifically, the second coupling member 32 includes a supporting portion 322 and a clamping portion 321, the supporting portion 322 is connected to the base 10, the clamping portion 321 is connected to the supporting portion 322 at an angle, a V-shaped groove 3211 is provided on the clamping portion 321, and the V-shaped groove 3211 is recessed toward the side where the supporting portion 322 is provided. The V-shaped grooves 3211 of the two second coupling members 32 are both fitted to the coupling shaft 21, and by recessing the V-shaped grooves 3211 toward the side where the supporting portion 322 is provided, the second coupling members 32 can be connected to the base 10 through the supporting portion 322, and the provision of the supporting portion 322 will not affect the spacing distance between the two second coupling members 32.

[0064] In this embodiment, the second connecting member 32 is in the shape of a bent plate, the clamping portion 321 extends in the vertical direction, and the middle portion of the clamping portion 321 is bent to form a V-shaped groove 3211; the supporting portion 322 is connected to the bottom end of the clamping portion 321 and extends in the horizontal direction, two supporting portions 322 are arranged at intervals, and the V-shaped groove 3211 is located between the two supporting portions 322.

[0065] In this embodiment, the base 10 is provided with a positioning groove 11, and the positioning groove 11 is arranged one-to-one with the support portion 322. The support portion 322 is at least partially embedded in the positioning groove 11 and is detachably connected to the base 10. The base 10 is made of plastic material, and the second connecting member 32 is made of metal material. By providing a detachable second connecting member 32, the second connecting member 32 and the base 10 can be processed separately, which is convenient for replacing the second connecting member 32. By providing the positioning groove 11 on the base 10, the stability of the installation position of the second connecting member 32 is ensured.

[0066] In order to set the second coupling member 32 on the base 10, the coupling assembly includes a second fastener, which is inserted into the base 10 and fixed at its end to the second coupling member 32. In this embodiment, the support portion 322 can be completely embedded in the positioning groove 11, and the shape of the positioning groove 11 matches the support portion 322; a second mounting hole is provided on the support portion 322 of the second coupling member 32, and the second fastener is inserted into the through hole of the base 10 and threadedly matched with the second mounting hole; each second coupling member 32 is provided with only one second mounting hole, and the second mounting holes of the two second coupling members 32 are located at diagonal positions; the second fastener is a screw. In other embodiments, the size of the positioning groove 11 can also be set to be larger than the size of the support portion 322, and the support portion 322 is slidably embedded in the positioning groove 11, so that the support portions 322 of the two second coupling members 32 can be relatively close to or away from each other in the positioning groove 11.

[0067] The following is the specific installation process of the manual operating mechanism of this embodiment:

[0068] Place the second connecting piece 32 on the base 10, place the supporting portion 322 of the second connecting piece 32 in the positioning groove 11, and pass the screw through the bottom of the base 10 to fix the second connecting piece 32 in the positioning groove 11; fix one second connecting piece 32, and then fix the second second connecting piece 32. After the two second connecting pieces 32 are fixed, insert the bottom end of the connecting shaft 21 between the two second connecting pieces 32, connect the two second connecting pieces 32 through a locking piece to adjust and clamp the connecting shaft 21, so that the connecting shaft 21 and the V-groove 3211 groove wall of the second connecting piece 32 are tightly matched; finally, install the handle device 22 on the top of the connecting shaft 21.

[0069] 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. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Manual operating mechanism, characterized in that: include: A base (10) for cooperating with a handle of a low-voltage circuit breaker; A connecting assembly connected to the base (10) and enclosed with the base (10) to form a receiving space; The rotary handle (20) comprises a connecting shaft (21) and a handle device (22), wherein one end of the connecting shaft (21) is inserted into the accommodation space and the part inserted into the accommodation space is tightly matched with the accommodation space, and the other end of the connecting shaft (21) is connected to the handle device (22).

2. The manual operating mechanism according to claim 1, characterized in that: The connecting assembly comprises a first connecting piece (31), the first connecting piece (31) is connected to the base (10), the accommodating space comprises a first through hole (311) arranged on the first connecting piece (31), and the connecting shaft (21) is inserted into the first through hole (311) and tightly matched with the first through hole (311).

3. The manual operating mechanism according to claim 2, characterized in that: The accommodating space further comprises a second through hole (12) arranged on the base (10), the second through hole (12) being connected to the first through hole (311), the connecting shaft (21) passing through the first through hole (311) and inserted into the second through hole (12), the connecting shaft (21) being tightly matched with the second through hole (12).

4. The manual operating mechanism according to claim 2, characterized in that: The first connecting member (31) is provided with a reinforcing protrusion (312), and the reinforcing protrusion (312) is arranged around the edge of the first penetration hole (311).

5. The manual operating mechanism according to claim 2, characterized in that: The first connecting member (31) is plate-shaped, a positioning groove (11) is provided on the base (10), and the first connecting member (31) is at least partially embedded in the positioning groove (11) and is detachably connected to the base (10).

6. The manual operating mechanism according to claim 2, characterized in that: The connecting assembly also includes a first fastener, which is passed through the base (10) and has an end portion fixed to the first connecting member (31).

7. The manual operating mechanism according to claim 1, characterized in that: The coupling assembly comprises a locking member and at least two second coupling members (32) connected to the base (10), the two second coupling members (32) being arranged at intervals and enclosing the accommodation space with the base (10), and the locking member connecting the two second coupling members (32) so that the coupling shaft (21) is tightly fitted with the accommodation space.

8. The manual operating mechanism according to claim 7, characterized in that: Each of the second connecting members (32) is respectively provided with a V-shaped groove (3211), and the two V-shaped grooves (3211) and the base (10) are arranged to form the accommodation space, and the connecting shaft (21) is square and the outer side surface of the connecting shaft (21) is in contact with the groove wall of the V-shaped groove (3211).

9. The manual operating mechanism according to claim 8, characterized in that: The second connecting member (32) comprises: A support portion (322) connected to the base (10); The clamping portion (321) is connected to the supporting portion (322) at an angle, and the V-shaped groove (3211) is arranged on the clamping portion (321), and the V-shaped groove (3211) is recessed toward the side where the supporting portion (322) is arranged.

10. Molded case circuit breaker, characterized in that: Comprising a manual operating mechanism as described in any one of claims 1-9.

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