Handle structure and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a handle structure and a circuit breaker. The handle structure comprises a heat dissipation piece, a containing cavity, heat dissipation holes and an opening are formed in the heat dissipation piece, and the heat dissipation holes and the opening are both communicated with the containing cavity; and the operating piece comprises a handle part, one end of the handle part penetrates through the opening and is inserted into the accommodating cavity, and a heat dissipation groove is formed in the handle part and is communicated with the heat dissipation holes. The handle of the circuit breaker can be cooled conveniently, and the temperature rise of the handle does not exceed a specified value.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a handle structure and a circuit breaker. Background Art

[0002] JP low-voltage power distribution reactive compensation integrated cabinet is a new outdoor power distribution reactive compensation integrated cabinet designed based on the principles of safety, economy, rationality and reliability. It is suitable for AC 50Hz, rated voltage 380V distribution systems such as urban power grid, rural power grid transformation, industrial and mining enterprises, street lighting, residential areas, etc. It is a new outdoor integrated distribution box with multiple functions such as power distribution, control, protection, reactive compensation, power metering, etc.

[0003] However, due to differences in the design of non-standard JP cabinets, such as different copper bar cross-sectional areas, heat dissipation conditions, etc., the temperature of the handle of the existing plastic case circuit breaker increases in the non-standard JP cabinet. In the prior art, in order to solve the problem that the temperature rise of the circuit breaker handle is not conducive to manual operation of the circuit breaker opening and closing, the handle of the circuit breaker is lengthened, but due to the limitation of the size of the JP cabinet and the limitation of heat dissipation conditions, the effect of reducing the temperature of the handle is not ideal. Utility Model Content

[0004] The utility model aims to provide a handle structure and a circuit breaker, which are convenient for cooling the handle of the circuit breaker and ensure the normal opening and closing of the manual operating mechanism of the circuit breaker.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The handle structure includes:

[0007] A heat sink, wherein the heat sink is provided with a receiving cavity, a heat dissipation hole and an opening, and the heat dissipation hole and the opening are both connected to the receiving cavity;

[0008] The operating member comprises a handle portion, one end of which passes through the opening and is inserted into the accommodating cavity, and a heat dissipation groove is arranged on the handle portion, and the heat dissipation groove is communicated with the heat dissipation hole.

[0009] As an optional solution for the handle structure, the heat sink is provided with a plurality of heat dissipation holes, two opposite sides of the handle portion are provided with a plurality of heat dissipation grooves, and the plurality of heat dissipation grooves on each side of the handle portion (201) are arranged at intervals along the first direction.

[0010] As an optional solution for the handle structure, two opposite side surfaces of the heat sink are provided with cantilevers extending along the first direction, and the ends of the cantilevers are provided with snap-fit ​​portions, which can be snap-fitted with any of the heat dissipation slots.

[0011] As an optional solution for the handle structure, the inner wall of each buckle portion is provided with a first chamfered surface, and two first chamfered surfaces are arranged to be inclined toward each other from the end of the buckle portion.

[0012] As an optional solution for the handle structure, a reinforcing rib is provided on the cantilever, one end of the reinforcing rib extends to the buckle portion, and the other end of the reinforcing rib extends to the inner wall of the heat sink.

[0013] As an optional scheme for the handle structure, the side walls of the accommodating cavity opposite to the side of the handle portion where the heat dissipation groove is not provided are respectively provided with a plurality of structural ribs, each of the structural ribs extends along a first direction, and the multiple structural ribs located on the same side of the accommodating cavity are arranged at intervals along a second direction, and the structural ribs are pressed against the handle portion.

[0014] As an optional solution for the handle structure, a limiting column is provided at the bottom of the accommodating cavity, and a limiting hole is correspondingly provided at the top of the handle portion, and the limiting column is inserted into the limiting hole.

[0015] As an optional solution to the handle structure, the limiting column is provided with a hollow structure.

[0016] As an optional solution for the handle structure, two opposite outer surfaces of the heat sink are respectively provided with anti-slip structures.

[0017] A circuit breaker comprises a manual operating mechanism and a technical solution of a handle structure as described in any one of the above items, wherein the handle structure is arranged on the manual operating mechanism.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The handle structure provided by the utility model has a heat dissipation groove on the handle portion of the operating member, and the heat dissipation member is sleeved on the handle portion of the operating member through the opening on the heat dissipation member, so that the handle portion is located in the accommodating cavity of the heat dissipation member, and the heat dissipation groove is connected with the heat dissipation hole, and the heat of the handle portion can be transferred to the accommodating cavity through the heat dissipation groove. By opening the heat dissipation hole on the heat dissipation member, it is convenient to diffuse the heat in the accommodating cavity outward to avoid heat accumulation. In actual use, the operating member of the handle structure is installed on the manual operating mechanism of the circuit breaker, which is not only convenient for effectively cooling the circuit breaker handle and realizing the normal operation of the manual operating mechanism; and by adopting the method of sleeve the heat dissipation member on the handle portion of the operating member, the overall shape of the handle is less increased, and it will not be limited by the size of the electric control cabinet and the heat dissipation conditions, and effectively ensure the reduction of the handle temperature.

[0020] The circuit breaker provided by the utility model installs the handle structure on the manual operating mechanism, which is convenient for transferring the heat of the manual operating mechanism outward through the handle structure, and is convenient for cooling the handle of the circuit breaker, ensuring that the temperature rise of the handle does not exceed the specified value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an assembly diagram of the handle structure in the embodiment of the utility model;

[0022] Figure 2 This is an exploded view of the handle structure in the embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the heat sink in the embodiment of the utility model;

[0024] Figure 4 is a top view of the handle structure in the embodiment of the utility model;

[0025] Figure 5 yes Figure 4 A cross-sectional view taken along the AA axis (the shaded area with oblique lines in the figure is the heat sink, and the shaded area with cross lines is the handle portion of the operating element).

[0026] In the figure:

[0027] 1. Heat dissipation parts; 2. Operating parts;

[0028] 101, heat dissipation hole; 102, opening; 103, cantilever; 104, buckle portion; 105, first chamfered surface; 106, reinforcing ribs; 107, structural ribs; 108, limiting column; 1081, hollow structure; 109, anti-slip structure; 1010, second chamfered surface; 1011, accommodating cavity;

[0029] 201, handle; 202, heat dissipation slot; 203, limit hole; 204, arc-shaped part; 205, heat dissipation rib;

[0030] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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 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.

[0035] In order to facilitate the cooling of the circuit breaker handle and ensure the normal opening and closing of the circuit breaker manual operating mechanism, this embodiment provides a handle structure and a circuit breaker. Figures 1 to 5 The specific contents of this embodiment are described in detail.

[0036] like Figures 1 to 3 As shown, the handle structure includes a heat sink 1 and an operating member 2. A receiving cavity 1011 is provided in the heat sink 1, and a heat dissipation hole 101 and an opening 102 are provided on the heat sink 1. Both the heat dissipation hole 101 and the opening 102 are connected to the receiving cavity 1011. The operating member 2 includes a handle portion 201, one end of which passes through the opening 102 and is inserted into the receiving cavity 1011. A heat dissipation groove 202 is provided on the handle portion 201, and the heat dissipation groove 202 is connected to the heat dissipation hole 101.

[0037] In short, a heat dissipation groove 202 is provided on the handle portion 201 of the operating member 2, and the heat dissipation member 1 is sleeved on the handle portion 201 of the operating member 2 through the opening 102 on the heat dissipation member 1, so that the handle portion 201 is located in the accommodating cavity 1011 of the heat dissipation member 1, and the heat dissipation groove 202 is connected with the heat dissipation hole 101, and the heat of the handle portion 201 can be transferred to the accommodating cavity 1011 through the heat dissipation groove 202. By providing the heat dissipation hole 101 on the heat dissipation member 1, it is convenient to diffuse the heat in the accommodating cavity 1011 outward to avoid heat accumulation. In actual use, the operating member 2 of the handle structure is installed on the manual operating mechanism of the circuit breaker, which is convenient for effectively cooling the circuit breaker handle and realizing the normal operation of the manual operating mechanism. By adopting the method of sleeved on the handle portion 201 of the operating member 2, the overall shape of the handle is less increased, and it will not be limited by the size of the electric control cabinet and the heat dissipation conditions, which effectively ensures the reduction of the handle temperature.

[0038] Optionally, the heat sink 1 is integrally molded by injection molding, and the heat sink 1 can be made of, but not limited to, plastic materials such as PA66. PA66, also known as nylon 66, is a polyamide material. It is a translucent or opaque plastic with very high strength and rigidity. A heat dissipation hole 101 is provided on the top of the heat sink 1. The heat dissipation hole 101 was originally an injection hole formed to facilitate injection molding during injection molding, but after the heat sink 1 is installed, the heat dissipation hole 101 can actually improve the heat dissipation effect.

[0039] Furthermore, if Figures 2 to 5 As shown, the heat sink 1 is provided with a plurality of heat dissipation holes 101, and two opposite sides of the handle portion 201 are provided with a plurality of heat dissipation grooves 202, and the heat dissipation grooves 202 are separated by heat dissipation ribs 205. The arrangement of the grooves and the heat dissipation ribs 205 can increase the heat dissipation area, thereby improving the heat dissipation effect. The plurality of heat dissipation grooves 202 on each side of the handle portion 201 are arranged at intervals along the first direction X. By increasing the number of heat dissipation holes 101 and heat dissipation grooves 202, the heat dissipation in the handle portion 201 and the accommodating cavity 1011 is accelerated. In some application scenarios, the number of heat dissipation holes 101 can be designed according to actual use needs, and no excessive restrictions are made here.

[0040] Furthermore, if Figure 3 and Figure 5As shown, cantilevers 103 extending along the first direction X are provided on two opposite sides of the heat sink 1, and buckle portions 104 are provided at the ends of the cantilevers 103, and the buckle portions 104 can be buckled with any heat sink 202. The buckle portions 104 are buckled with the heat sink 202, thereby ensuring that the heat sink 1 is firmly connected to the handle portion 201 of the operating member 2. When the heat sink 1 is installed in place, the buckle portions 104 of the heat sink 1 are located in the lowest heat sink 202 and buckled with the corresponding heat sink ribs 205. Therefore, even if the heat sink 1 falls out of the lowest heat sink 202, it can fall into the upper heat sink 202, thereby playing a protective role in preventing the heat sink 1 from falling out.

[0041] Furthermore, the inner wall of the buckle portion 104 is provided with a first chamfered surface 105, and the two first chamfered surfaces 105 are arranged to be inclined toward each other from the end of the buckle portion 104. That is, the width between the outer wall surface of the buckle portion 104 and the first chamfered surface 105 gradually decreases in the direction close to the opening 102, and the friction between the first chamfered surface 105 and the heat dissipation rib 205 facilitates the elastic deformation of the cantilever 103 and thus increases the distance between the two buckle portions 104, so that the handle portion 201 can be smoothly inserted into the heat sink 1.

[0042] Specifically, the buckle portion 104 of the heat sink 1 is a claw; the claw adopts a structure that is wide at the top and narrow at the bottom. A reinforcing rib 106 is provided on the cantilever 103, one end of the reinforcing rib 106 extends to the buckle portion 104, and the other end of the reinforcing rib 106 extends to the inner wall of the heat sink 1. The reinforcing rib 106 can reduce the distance between the buckle portion 104 and the cantilever 103, and the width of the reinforcing rib 106 is much smaller than the width of the cantilever 103, so that the strength of the cantilever 103 can be improved, and at the same time, the external force required for the buckle portion 104 to deform can be increased, thereby enhancing the anti-detachment performance of the heat sink 1.

[0043] Optionally, the operating member 2 further includes an arc-shaped member 204, and the arc-shaped member 204 is connected to the lower end of the handle portion 201. In actual use, the arc-shaped member 204 rotates with the second direction Y as the axis. In this embodiment, the heat dissipation slot 202 and the buckle portion 104 are arranged on the side of the handle structure (rather than the front and back of the handle structure). When the handle structure is turned, the heat dissipation slot 202 and the buckle portion 104 are prevented from being subjected to force at the clamping point, thereby ensuring the stability of the connection between the heat dissipation member 1 and the operating member 2.

[0044] Furthermore, if Figure 3As shown, the side walls of the accommodating cavity 1011 and the side of the handle portion 201 where the heat dissipation groove 202 is not provided are respectively provided with a plurality of structural ribs 107, each of which extends along the first direction X, and the plurality of structural ribs 107 located on the same side of the accommodating cavity 1011 are arranged at intervals along the second direction Y, and the structural ribs 107 are pressed against the handle portion 201. The structural ribs 107 can guide the handle portion 201 to be inserted into the heat sink 1 along the first direction X. By adding the structural ribs 107, not only the structural strength of the heat sink 1 can be improved, but also the distance between the inner wall surface of the heat sink 1 and the handle portion 201 can be increased, thereby further improving the heat dissipation effect. Specifically, in this embodiment, a plurality of structural ribs 107 are provided on the front and back surfaces inside the heat sink 1.

[0045] Furthermore, if Figure 3 and Figure 5 As shown, a limiting column 108 is provided at the bottom of the accommodating cavity 1011, and a limiting hole 203 is correspondingly provided at the top of the handle portion 201, and the limiting column 108 is inserted into the limiting hole 203. By adding the limiting column 108 and cooperating with the limiting hole 203, the connection stability between the heat sink 1 and the operating member 2 is further improved to prevent the heat sink 1 from falling off. In this embodiment, the limiting column 108 and the limiting hole 203 are both circular, and are used to limit the heat sink 1 and the handle portion 201 in the front, rear, left, and right directions.

[0046] Furthermore, the limiting column 108 is provided with a hollow structure 1081 , and by adding the hollow structure 1081 , the weight of the heat sink 1 is reduced.

[0047] Furthermore, if Figure 1 and Figure 3 As shown, the heat sink 1 is provided with anti-skid structures 109 on the other two opposite outer surfaces to increase the friction between the heat sink 1 and the human hand when opening and closing the switch. Exemplarily, the anti-skid structure 109 is an anti-skid pattern, and the front and back sides of the outer wall of the heat sink 1 are provided with anti-skid patterns extending along the second direction Y and arranged side by side along the first direction X, so as to increase the friction during operation or installation. A second chamfered surface 1010 is also provided at the bottom of the heat sink 1 for easy installation.

[0048] This embodiment also provides a circuit breaker, which includes a manual operating mechanism and the handle structure mentioned above, and the handle structure is arranged on the manual operating mechanism, so as to facilitate cooling of the circuit breaker handle and ensure that the temperature rise of the handle meets the specified value.

[0049] 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. The handle structure is characterized by: include: A heat sink (1), wherein the heat sink (1) is provided with a housing cavity (1011), a heat dissipation hole (101) and an opening (102), and the heat dissipation hole (101) and the opening (102) are both in communication with the housing cavity (1011); The operating member (2) comprises a handle portion (201), one end of the handle portion (201) passes through the opening (102) and is inserted into the accommodating cavity (1011), and a heat dissipation groove (202) is provided on the handle portion (201), and the heat dissipation groove (202) is communicated with the heat dissipation hole (101).

2. The handle structure according to claim 1, characterized in that: The heat sink (1) is provided with a plurality of heat dissipation holes (101), two opposite side surfaces of the handle portion (201) are provided with a plurality of heat dissipation grooves (202), and the plurality of heat dissipation grooves (202) on each side of the handle portion (201) are arranged at intervals along a first direction (X).

3. The handle structure according to claim 2, characterized in that: Two opposite side surfaces of the heat sink (1) are provided with cantilevers (103) extending along a first direction (X), and the ends of the cantilevers (103) are provided with snap-fit ​​portions (104), and the snap-fit ​​portions (104) can be snap-fitted with any of the heat sinks (202).

4. The handle structure according to claim 3, characterized in that: The inner wall of each of the buckle portions (104) is provided with a first chamfered surface (105), and the two first chamfered surfaces (105) are arranged at an angle towards each other from the end portions of the buckle portions (104).

5. The handle structure according to claim 3, characterized in that: The cantilever (103) is provided with a reinforcing rib (106), one end of the reinforcing rib (106) extends to the buckle portion (104), and the other end of the reinforcing rib (106) extends to the inner wall of the heat sink (1).

6. The handle structure according to claim 2, characterized in that: A plurality of structural ribs (107) are respectively provided on the side walls of the accommodating cavity (1011) and the side of the handle portion (201) on which the heat dissipation groove (202) is not provided, each of the structural ribs (107) extends along a first direction (X), and a plurality of the structural ribs (107) located on the same side of the accommodating cavity (1011) are arranged at intervals along a second direction (Y), and the structural ribs (107) are pressed against the handle portion (201).

7. The handle structure according to claim 1, characterized in that: A limiting column (108) is provided at the bottom of the accommodating cavity (1011), and a limiting hole (203) is correspondingly provided at the top of the handle portion (201), and the limiting column (108) is inserted into the limiting hole (203).

8. The handle structure according to claim 7, characterized in that: The limiting column (108) is provided with a hollow structure (1081).

9. The handle structure according to claim 1, characterized in that: The heat sink (1) is also provided with anti-slip structures (109) on two opposite outer surfaces.

10. A circuit breaker, characterized in that It comprises a manual operating mechanism and a handle structure as described in any one of claims 1 to 9, wherein the handle structure is arranged on the manual operating mechanism.

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