Injection mold, lever, operating mechanism and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an injection mold, a lever, an operating mechanism and a circuit breaker. The injection mold comprises a movable module and a static module; wherein a first mold core is arranged in the movable mold set; a first mold core and a third mold core are arranged in the movable mold set, a second mold core and a third mold core are arranged in the static mold set, the static mold set and the movable mold set are oppositely arranged, so that a mold cavity used for forming a lever body is formed between the movable mold set and the static mold set, the first mold core, the second mold core and the third mold core are located in the mold cavity, and the first mold core and the second mold core are matched in the mold cavity to form the lever body; the third mold core vertically penetrates through the mold cavity and is matched with the first mold core and the second mold core so as to form an open hole and a hook on the lever main body, and the third mold core is inserted into the formed open hole. According to the lever forming mold, the vertically-penetrating third mold core is arranged to replace a side mold core sliding block placed on the side face in the prior art, more levers can be formed at a time, the forming quality of the levers can be guaranteed, and meanwhile the quality consistency of the levers formed in all the mold cavities can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an injection mold, a lever, an operating mechanism and a circuit breaker. Background Art

[0002] In the lever of the circuit breaker, a hook matching with the positioning torsion spring needs to be formed so that the hook can abut against one end of the positioning spring; currently, the hook is usually formed by a side core slider, that is, a side core slider is placed laterally in the cavity formed between the dynamic mold group and the static mold group.

[0003] However, due to the molding method using the above-mentioned side core slider: 1. It is easy to cause the cavity to occupy a larger space, resulting in a smaller number of cavities formed between the movable mold group and the static mold group; 2. Since there are three mutually cooperating parting surfaces in the cavity, namely the static mold group, the movable mold group and the side core slider, it is easy to cause burrs on the molded lever, and the molding quality of the lever cannot be guaranteed; 3. Since the distance between each cavity is relatively far apart, the flow channel arrangement in the movable mold group and the static mold group is unreasonable, resulting in poor balance of the flow channel to the glue injection in each cavity, thereby being unable to guarantee the quality consistency of the levers molded in each cavity.

[0004] Therefore, there is an urgent need for an injection mold, a lever, an operating mechanism and a circuit breaker to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold, a lever, an operating mechanism and a circuit breaker, which can reduce the space occupied by the cavity, so that more levers can be molded at one time, and the molding quality of the levers can be guaranteed, and at the same time, the quality consistency of the levers molded in each cavity can be guaranteed.

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

[0007] An injection mold is used for molding a lever, wherein the lever comprises a lever body and a hook arranged on the lever body, and an opening is arranged on the lever body below the hook. The injection mold comprises:

[0008] A movable mold assembly, in which a first core is disposed;

[0009] A static mold group is provided with a second core and a third core therein. The static mold group is arranged opposite to the dynamic mold group so that a cavity for molding the lever body is formed between the dynamic mold group and the static mold group. The first core, the second core and the third core are respectively located in the cavity. The first core and the second core cooperate to form the lever body in the cavity. The third core vertically passes through the cavity and cooperates with the first core and the second core to form the opening and the hook on the lever body, and the third core is inserted into the molded opening.

[0010] As an optional solution, the first core includes:

[0011] The first parting core, the second parting core, the third parting core and the fourth parting core are respectively used to form the first lever part, the second lever part, the rotating shaft and the reinforcing ribs on the lever body.

[0012] As an optional solution, the end of the third core has a first inclined surface, and when the third core cooperates with the first core and the second core to form the hook on the lever body, the first inclined surface is used to form a second inclined surface of the hook.

[0013] As an optional solution, the second core includes a fifth parting core, a sixth parting core, a seventh parting core and an eighth parting core, and the sixth parting core, the eighth parting core, the fifth parting core and the seventh parting core are respectively used to form the first protrusion, the second protrusion, the third protrusion and the fourth protrusion on the lever body.

[0014] The lever comprises a lever body and a hook arranged on the lever body, an opening is arranged on the lever body below the hook, and the injection mold as described above is configured to mold the lever.

[0015] As an optional solution, the lever body of the lever is provided with a first protrusion, a second protrusion, a third protrusion and a fourth protrusion on the reverse side surface thereof, and the lever body is provided with a first lever part, a second lever part, a rotating shaft and a reinforcing rib on the forward side surface thereof opposite to the reverse side surface, the first lever part is used to cooperate with the contact support, the second lever part is located on one side of the first lever part, the second lever part is used to cooperate with the jump buckle, the reinforcing rib is arranged close to the opening, and the hook is located between the rotating shaft and the second lever part.

[0016] As an optional solution, two reinforcing ribs are provided, and the two reinforcing ribs are respectively located on both sides of the opening.

[0017] An operating mechanism, comprising the lever as described above, the operating mechanism further comprising:

[0018] a contact support mounted to the first lever portion of the lever;

[0019] A positioning torsion spring is sleeved on the contact support, and a first end of the positioning torsion spring abuts against the hook, and a second end of the positioning torsion spring abuts against the contact support.

[0020] A circuit breaker comprises a housing and the operating mechanism as described above, wherein the operating mechanism is arranged in the housing.

[0021] As an optional solution, the circuit breaker further includes:

[0022] A static contact, disposed in the housing;

[0023] The movable contact is arranged on the contact support, and the lever is used to drive the contact support to move, so that the contact support drives the movable contact to rotate in a direction close to the static contact.

[0024] Beneficial effects:

[0025] The injection mold proposed by the utility model forms a cavity for molding the lever body between the movable mold group and the static mold group, and arranges a first core and a second core in the cavity so as to be used for molding the outer convex structure on the lever body, thereby being able to mold a complete lever; at the same time, a third core is also arranged in the static mold group, so that the third core vertically passes through the cavity and cooperates with the first core and the second core to form an opening and a hook on the lever body, and the third core is inserted into the molded opening, so that the molding of the hook is relatively simple and convenient, saving time and labor; compared with the prior art of using a side core slider to mold the hook, it is extremely It greatly saves the space of the cavity, making the occupied area of ​​the cavity smaller, so that more cavities can be formed between the static mold group and the dynamic mold group, and more levers can be molded at one time, thereby making the molding efficiency of the lever higher; and, since there are only two parting surfaces that cooperate with each other, the static mold group and the dynamic mold group, the number of parting surfaces is reduced, which can reduce the burrs on the lever and ensure the molding quality of the lever; at the same time, since the distances between the various cavities are relatively close, it is convenient to arrange the runners, so that the runners have a better balance on the glue injection in each cavity, thereby ensuring the quality consistency of the levers molded in each cavity.

[0026] The lever provided by the utility model can ensure good molding quality of the lever and consistency of molding quality of each lever because it is molded by the above-mentioned injection mold.

[0027] The operating mechanism provided by the utility model can ensure the stability and reliability of the operation of the operating mechanism because it includes the lever.

[0028] The circuit breaker provided by the utility model, because it includes the above-mentioned operating mechanism, can ensure the working stability and reliability of the entire circuit breaker to be high. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the injection mold provided in the utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the lever (with a third core inserted) provided in the utility model Figure 1 ;

[0031] Figure 3 It is a schematic diagram of the structure between the second core and the lever provided in the utility model;

[0032] Figure 4 It is a structural schematic diagram of a third core provided in the utility model;

[0033] Figure 5 It is a schematic diagram of the structure between the third core and the fourth sub-core provided in the utility model and the lever respectively;

[0034] Figure 6 It is a schematic diagram of the structure between the first core and the lever provided in the utility model;

[0035] Figure 7 This is a schematic diagram of the structure of the lever provided in the utility model. Figure 2 ;

[0036] Figure 8 This is a schematic diagram of the structure of the lever provided in the utility model. Figure 3 ;

[0037] Fig. 9 This is a schematic diagram of the structure of the lever provided in the utility model. Figure 4 ;

[0038] Fig.10 It is a structural schematic diagram of the operating mechanism provided in the utility model;

[0039] Fig.11 It is a structural schematic diagram of the positioning torsion spring provided in the utility model.

[0040] In the figure:

[0041] 1. Moving mold assembly; 11. First parting core; 12. Second parting core; 13. Third parting core; 14. Fourth parting core; 15. Ninth parting core;

[0042] 2. static mold group; 21. second core; 211. fifth sub-core; 212. sixth sub-core; 213. seventh sub-core; 214. eighth sub-core; 22. third core; 221. first inclined surface; 23. cavity;

[0043] 3. Lever; 31. Lever body; 311. First side surface; 312. Second side surface; 313. Opening; 321. First protrusion; 322. Second protrusion; 323. Third protrusion; 324. Fourth protrusion; 33. First lever part; 34. Second lever part; 35. Rotating shaft; 36. Reinforcing rib; 37. Hook; 371. Second inclined surface; 38. Step surface;

[0044] 4. Contact support; 5. Positioning torsion spring; 51. First end; 52. Second end; 6. Moving contact. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified 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.

[0049] like Figures 1 to 9 As shown, in this embodiment, an injection mold and a lever 3 injection-molded by the injection mold are proposed; wherein the lever 3 comprises a lever body 31 and a hook 37 arranged on the lever body 31, and an opening 313 is arranged on the lever body 31 and below the hook 37; the injection mold comprises a movable mold group 1 and a stationary mold group 2; a first core is arranged in the movable mold group 1; a second core 21 and a third core 22 are arranged in the stationary mold group 2, and the stationary mold group 2 is arranged opposite to the movable mold group 1, so as to The movable mold group 1 and the static mold group 2 form a cavity 23 for molding the lever body 31. The first core, the second core 21 and the third core 22 are respectively located in the cavity 23. The first core and the second core 21 cooperate with each other to form the lever body 31 in the cavity 23. The third core 22 is used to vertically pass through the cavity 23 and cooperate with the first core and the second core 21 to form an opening 313 and a hook 37 on the lever body 31. The third core 22 is inserted into the molded opening 313. The vertical direction is specifically Figure 1 The direction indicated by the arrow Z.

[0050] Compared with the prior art, the injection mold in this embodiment changes the molding method of the hook 37, eliminates the side core slider placed on the inner side of the cavity 23, and adopts a third core 22 vertically inserted in the static mold group 2 to replace the molding function of the side core slider, so that the third core 22 and the second core 21 can be set in the same direction, and will not occupy additional space in the cavity 23; a cavity 23 for molding the lever body 31 is formed between the dynamic mold group 1 and the static mold group 2, and a first core and a second core 21 are arranged in the cavity 23, so that the convex structure on the lever body 31 can be molded, so that a complete lever 3 can be molded; at the same time, a third core 22 is also arranged in the static mold group 2, so that the third core 22 is used to vertically pass through the cavity 23 and cooperate with the first core and the second core 21 to form an opening 313 and a hook 37 on the lever body 31, that is, Yes, the third core 22 is used to form the opening 313 and the hook 37 at the same time, so that the molding of the hook 37 is relatively simple and convenient, saving time and effort; compared with the prior art that uses the side core slider to form the hook 37, it greatly saves the space of the cavity 23, so that the occupied area of ​​the cavity 23 is smaller, so that a larger number of cavities 23 can be formed between the static mold group 2 and the dynamic mold group 1, and a larger number of levers 3 can be molded at one time, thereby making the molding efficiency of the lever 3 higher; and, since there are only two mutually cooperating parting surfaces of the static mold group 2 and the dynamic mold group 1, the number of parting surfaces is reduced, and the burrs on the lever 3 can be reduced, thereby ensuring the molding quality of the lever 3; at the same time, since the distances between the cavities 23 are relatively close, it is convenient to arrange the flow channel, so that the flow channel has a better balance on the glue inlet into each cavity 23, thereby ensuring the quality consistency of the lever 3 molded in each cavity 23.

[0051] It is worth noting that, when the side core slider forming hook 37 is used in the prior art, the number of cavities 23 formed between the static mold group 2 and the dynamic mold group 1 is thirty-two, while when the third core 22 forming hook 37 in this embodiment is used, sixty-four cavities 23 can be formed between the static mold group 2 and the dynamic mold group 1. Figure 1 As shown, that is, the injection mold in this embodiment can mold twice the number of levers 3 at one time compared with the prior art, which greatly improves the molding efficiency of the levers 3, reduces the number of injection molds required, and makes the molding cost of the levers 3 lower.

[0052] Specifically, Figures 3 to 9As shown, the first core includes a first split core 11, a second split core 12, a third split core 13, a fourth split core 14 and a ninth split core 15 arranged at intervals, and the first split core 11, the second split core 12, the third split core 13, the fourth split core 14 and the ninth split core 15 are respectively arranged in the movable mold assembly 1, so as to be respectively used for forming the first lever portion 33, the second lever portion 34, the rotating shaft 35, the reinforcing rib 36 and the step surface 38 of the lever 3. Here, the specific structures of the first split core 11, the second split core 12, the third split core 13, the fourth split core 14 and the ninth split core 15 are not limited, as long as they can match the structures of the first lever portion 33, the second lever portion 34, the rotating shaft 35, the reinforcing rib 36 and the step surface 38 respectively.

[0053] Specifically, if Figure 2 , Figure 4 and Fig. 9 As shown, the end of the third core 22 has a first inclined surface 221. When the third core 22 cooperates with the first core and the second core 21 to form a hook 37 on the lever body 31, the first inclined surface 221 is used to form a second inclined surface 371 of the hook 37, so that when the third core 22 vertically passes through the cavity 23 to form the hook 37, the second inclined surface 371 can be formed through the first inclined surface 221.

[0054] Furthermore, if Figures 2 to 8 As shown, the second core 21 includes a fifth split core 211, a sixth split core 212, a seventh split core 213 and an eighth split core 214. The sixth split core 212, the eighth split core 214, the fifth split core 211 and the seventh split core 213 are respectively used to form a first protrusion 321, a second protrusion 322, a third protrusion 323 and a fourth protrusion 324 on the lever body 31. The first protrusion 321, the second protrusion 322, the third protrusion 323 and the fourth protrusion 324 can be used to realize the connection relationship between the lever 3 and other structures in the circuit breaker. Here, the structure and number of the split cores included in the second core 21 and the structure and number of the protrusions formed are not specifically limited.

[0055] That is, if Figure 2 , Figures 7 to 9As shown, the outer convex structure on the lever body 31 mentioned above specifically includes a first lever portion 33, a second lever portion 34, a rotating shaft 35, a reinforcing rib 36, a step surface 38, and a first protrusion 321, a second protrusion 322, a third protrusion 323 and a fourth protrusion 324; the first protrusion 321, the second protrusion 322, the third protrusion 323 and the fourth protrusion 324 are respectively arranged on the reverse side surface 312 of the lever body 31, and the first lever portion 33, the second lever portion 34, the rotating shaft 35 and the reinforcing rib 36 are respectively arranged on the forward side surface 311 of the lever body 31 opposite to the reverse side surface 312; wherein, the first lever portion 33 is used to cooperate with the contact support 4, the second lever portion 34 is located on one side of the first lever portion 33, the second lever portion 34 is used to cooperate with the tripping buckle of the circuit breaker, the reinforcing rib 36 is arranged close to the opening 313, and the hook 37 is located between the rotating shaft 35 and the second lever portion 34.

[0056] By setting a reinforcing rib 36 near the opening 313, the problem of low structural strength of the lever 3 caused by setting the opening 313 on the lever body 31 can be avoided, so as to ensure the overall balance of the force on the lever 3, improve the deformation resistance of the lever 3, and ensure that the structural strength of the entire lever 3 is high.

[0057] Furthermore, if Figure 2 As shown, two reinforcing ribs 36 are provided, and the two reinforcing ribs 36 are respectively located on both sides of the opening 313, so as to increase the structural strength of the lever 3 from both sides of the opening 313, further improve the deformation resistance of the lever 3, and ensure that the structural strength of the entire lever 3 is higher.

[0058] The injection mold in this embodiment adopts a method of setting a third core 22 in the static mold group 2, so that the third core 22 vertically passes through the cavity 23 to form an opening 313 and a hook 37, thereby saving the space occupied by the cavity 23, increasing the number of cavities 23, and being able to mold more levers 3 at one time; and ensuring the molding quality of the levers 3 and the consistency of the molding quality of the levers 3 in each cavity 23.

[0059] The lever 3 in this embodiment can ensure the overall balance of the force on the lever 3 by setting reinforcing ribs 36 around the opening 313, improve the deformation resistance of the lever 3, ensure the high structural strength of the entire lever 3, and thus ensure the working stability and reliability of the lever 3.

[0060] The specific forming process of the lever 3 in this embodiment is as follows:

[0061] First, the polyphthalamide material is mixed evenly and then placed in an oven for drying for 3-4 hours at a temperature of 110° C.-130° C. The moisture content of the polyphthalamide material after drying in the oven is less than 0.03%.

[0062] Afterwards, the dried polyphthalamide material is added into the injection molding machine. The temperature of the barrel of the injection molding machine is 300℃-325℃, the material storage pressure of the screw of the injection molding machine is 120MPa±10, the material storage speed of the screw is 70±10r / min, and the injection back pressure is set to 6±2Mpa; when the material storage is completed, the screw is loosened, and the screw loosening pressure is 35±5MPa, and the loosening speed is 20±5r / min.

[0063] Then, operate the mold opening, that is, open the movable mold group 1 and the static mold group 2 to check the cleanliness of the movable mold group 1 and the static mold group 2, wipe the surface of the movable mold group 1 and the static mold group 2 with a clean cotton and linen cloth, and use mold cleaning agent to clean the oil stains, material ash and other stains on the movable mold group 1, the static mold group 2, the first core, the second core 21 and the third core 22, and then use an air gun to blow dry the cleaning agent remaining on the injection mold.

[0064] Then, hold the release agent and spray it quickly at a distance of 20cm-30cm from the surface of the static mold 2, and the spraying trajectory is a horizontal or vertical "Z" shape, and there is no need to spray multiple times at the same position.

[0065] Afterwards, the polyphthalamide material stored in the injection molding machine is injected into the cavity 23 formed between the preheated movable mold group 1 and the static mold group 2 through the heated hot runner nozzle. The injection pressure is set to 120±10MPa, and the injection speed is set to 90±10mm / s. When the polyphthalamide material in the barrel of the injection molding machine is injected to the specified position, the injection is stopped. At this time, the cavity 23 is filled with 90%-95% of the polyphthalamide material. At this time, the screw push pressure and speed decrease, and the filling continues to maintain pressure and compensate for shrinkage.

[0066] Then, the molten polyphthalamide material solidifies and shrinks in the cavity 23, and continues to replenish the compressed space in the cavity 23, the replenishment amount is 5%-10% of the total injection volume, and the pressure is maintained for 2±0.2s, the pressure is maintained at 45MPa, and the speed is 15mm / s.

[0067] Finally, after the above steps, the lever 3 has been injection molded and then enters the cooling process for water cooling. Cooling water is circulated to the static mold group 2, the dynamic mold group 1, the first core, the second core 21 and the third core 22 to reduce the temperature; when the demolding temperature of the lever 3 drops below 60°C, it is demolded to obtain the molded lever 3.

[0068] This embodiment also proposes an operating mechanism, such as Fig.10 and Fig.11As shown, the operating mechanism includes the above-mentioned lever 3, and the operating mechanism also includes a contact support 4 and a positioning torsion spring 5; wherein the contact support 4 is mounted on the first lever portion 33 of the lever 3; the positioning torsion spring 5 is sleeved on the contact support 4, and the first end 51 of the positioning torsion spring 5 abuts against the second inclined surface 371 of the hook 37, and the second end 52 of the positioning torsion spring 5 abuts against the contact support 4, so as to realize the matching connection between the positioning torsion spring 5 and the hook 37 and the contact support 4 respectively.

[0069] This embodiment further provides a circuit breaker, which includes a housing and the operating mechanism as described above, wherein the operating mechanism is disposed in the housing.

[0070] Furthermore, if Fig.10 As shown, the circuit breaker also includes a stationary contact and a moving contact 6; wherein the stationary contact is arranged in the housing; the moving contact 6 is arranged on the contact support 4, and the lever 3 is used to drive the contact 6 and the contact support 4 to move, so that the contact support 4 drives the moving contact 6 to rotate in the direction close to the stationary contact, so that the moving contact 6 contacts the stationary contact, thereby putting the circuit breaker in a conducting state.

[0071] It is worth noting that the contact support 4, positioning torsion spring 5, trip button, moving contact 6 and static contact involved above are common structures in existing circuit breakers. Their working principles will not be described in detail here, and reference can be made to the structures in existing circuit breakers.

[0072] 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. An injection mold for molding a lever, the lever comprising a lever body (31) and a hook (37) disposed on the lever body (31), an opening (313) being disposed on the lever body (31) below the hook (37), characterized in that: The injection mold comprises: A movable mold assembly (1) having a first core disposed therein; A static mold group (2) is provided with a second core (21) and a third core (22). The static mold group (2) is arranged opposite to the dynamic mold group (1) so that a cavity (23) for molding the lever body (31) is formed between the dynamic mold group (1) and the static mold group (2). The first core, the second core (21) and the third core (22) are respectively located in the cavity (23). The first core and the second core (21) cooperate to form the lever body (31) in the cavity (23). The third core (22) vertically passes through the cavity (23) and cooperates with the first core and the second core (21) to form the opening (313) and the hook (37) on the lever body (31). The third core (22) is inserted into the molded opening (313).

2. The injection mold according to claim 1, characterized in that: The first core comprises: A first parting core (11), a second parting core (12), a third parting core (13) and a fourth parting core (14), wherein the first parting core (11), the second parting core (12), the third parting core (13) and the fourth parting core (14) are respectively used to form a first lever part (33), a second lever part (34), a rotating shaft (35) and a reinforcing rib (36) on the lever body (31).

3. The injection mold according to claim 1, characterized in that: The end of the third core (22) has a first inclined surface (221), and when the third core (22) cooperates with the first core and the second core (21) to form the hook (37) on the lever body (31), the first inclined surface (221) is used to form a second inclined surface (371) of the hook (37).

4. The injection mold according to any one of claims 1 to 3, characterized in that: The second mold core (21) comprises a fifth mold core (211), a sixth mold core (212), a seventh mold core (213) and an eighth mold core (214); the sixth mold core (212), the eighth mold core (214), the fifth mold core (211) and the seventh mold core (213) are respectively used to form a first protrusion (321), a second protrusion (322), a third protrusion (323) and a fourth protrusion (324) on the lever body (31).

5. A lever, comprising a lever body (31) and a hook (37) disposed on the lever body (31), wherein an opening (313) is disposed on the lever body (31) below the hook (37), wherein: The injection mold according to any one of claims 1 to 4 is configured to mold the lever.

6. The lever according to claim 5, characterized in that The reverse side surface (312) of the lever body (31) is respectively provided with a first protrusion (321), a second protrusion (322), a third protrusion (323) and a fourth protrusion (324); the forward side surface (311) of the lever body (31) which is arranged opposite to the reverse side surface (312) is respectively provided with a first lever portion (33), a second lever portion (34), a rotating shaft (35) and a reinforcing rib (36); the first lever portion (33) is used to cooperate with the contact support (4); the second lever portion (34) is located at one side of the first lever portion (33); the second lever portion (34) is used to cooperate with a jump buckle; the reinforcing rib (36) is arranged close to the opening (313); and the hook (37) is located between the rotating shaft (35) and the second lever portion (34).

7. The lever according to claim 6, characterized in that Two reinforcing ribs (36) are provided, and the two reinforcing ribs (36) are respectively located on two sides of the opening (313).

8. An operating mechanism, characterized in that: The lever according to any one of claims 5 to 7, wherein the operating mechanism further comprises: A contact support (4) mounted to the first lever portion (33) of the lever; A positioning torsion spring (5) is sleeved on the contact support (4), and a first end (51) of the positioning torsion spring (5) abuts against the hook (37), and a second end (52) of the positioning torsion spring (5) abuts against the contact support (4).

9. A circuit breaker, characterized in that It comprises a housing and the operating mechanism as claimed in claim 8, wherein the operating mechanism is arranged in the housing.

10. The circuit breaker according to claim 9, characterized in that The circuit breaker further comprises: A static contact, disposed in the housing; A moving contact (6), wherein the moving contact (6) is arranged on the contact support (4), and the lever is used to drive the contact support (4) to move, so that the contact support (4) drives the moving contact (6) to rotate in a direction close to the stationary contact.

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