Overload protector

Abstract

The utility model discloses an overload protector, and belongs to the technical field of overload protectors. The overload protector comprises a housing which is provided with a first contact piece and a second contact piece and is provided with a guide hole; the bimetallic strip is arranged in the shell, the first end of the bimetallic strip is electrically connected with the first contact piece, and the second end of the bimetallic strip is separably and electrically connected with the second contact piece; the reset key is arranged in the guide hole in a sliding and penetrating mode, one end, located in the shell, of the reset key is in lap joint with the second end of the bimetallic strip, and the movement direction of the reset key is arranged in the overload deformation displacement direction of the second end of the bimetallic strip. According to the overload protector provided by the invention, the use convenience and safety of overload protection can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of overload protection devices, and particularly relates to an overload protector. BACKGROUND

[0002] In various types of electrical equipment, an overload protection mechanism is usually configured to disconnect the power supply structure of the electrical equipment when the electrical equipment is in an overload state, so as to realize an overload power-off protection function. In the prior art, an overload protection device is usually configured as a one-time burnout protector, which needs to be replaced after the overload factor is eliminated. This makes the use and maintenance operation of the electrical equipment inconvenient, and increases the damage risk of the electrical equipment. SUMMARY

[0003] The application provides an overload protector, which aims to at least solve the technical problems of insufficient installation and use convenience of the overload protection device and certain safety risks. To this end,

[0004] In an aspect of the application, an overload protector is provided, which comprises:

[0005] A shell is configured with a first contact piece and a second contact piece, and a guide hole is formed in the shell;

[0006] A bimetallic strip is arranged in the shell, and a first end of the bimetallic strip is electrically connected to the first contact piece, and a second end of the bimetallic strip is electrically connected to the second contact piece in a detachable manner;

[0007] A reset button is slidably arranged in the guide hole, one end of the reset button in the shell is lapped on the second end of the bimetallic strip, and the moving direction of the reset button is arranged along the overload deformation displacement direction of the second end of the bimetallic strip.

[0008] In some embodiments, the shell is provided with a first insertion slot and a second insertion slot, and the first contact piece and the second contact piece are inserted into the first insertion slot and the second insertion slot.

[0009] In some embodiments, the shell comprises a buckled upper cover and a base, the first insertion slot is arranged in the base, and the second insertion slot is arranged in the upper cover.

[0010] In some embodiments, a limiting rib is arranged on the base, and the limiting rib is arranged on the side of the bimetallic strip close to the base.

[0011] In some embodiments, a window is formed between the first end and the second end of the bimetallic strip, the second end of the bimetallic strip is provided with an extension arm extending into the window, the extension arm is detachably connected with the second contact piece, and the normal position of the extension arm is arranged to be connected with the second contact piece, so that when the bimetallic strip is deformed under overload, the extension arm is away from the second contact piece to disconnect the electrical connection.

[0012] In some embodiments, the reset button comprises:

[0013] A pressing rod movably arranged in the guide hole;

[0014] A guide member connected with the pressing rod and movably embedded in a guide groove in the housing;

[0015] A pushing member connected with the guide member or the pressing rod, and the pushing member is overlapped with the extension arm or the second end of the bimetallic strip.

[0016] In some embodiments, the guide hole is a circular hole, and the pressing rod part is a cylindrical rod.

[0017] In some embodiments, an extension cylinder is arranged on the housing and communicates with the guide hole, and the extension cylinder is sleeved on the outside of the pressing rod.

[0018] In some embodiments, the guide member is two pieces, and the two pieces of the guide member are arranged orthogonally in the guide groove.

[0019] In some embodiments, part of the groove body of the guide groove protrudes from the outer surface of the upper cover, and the groove opening of part of the groove body of the guide groove is flush with the inner surface of the upper cover.

[0020] The embodiments of the present application have at least the following beneficial effects:

[0021] The overload protector provided by the embodiments of the present application is based on the housing, and is configured with a first contact piece, a second contact piece, a bimetallic strip and a reset button. The first contact piece and the second contact piece can be connected to the wiring terminals in the power supply circuit of the electrical equipment, and the first contact piece and the second contact piece are detachably connected by the bimetallic strip to form a closed conductive path. It is worth noting that the bimetallic strip will deform due to the difference in thermal deformation characteristics of the two metal materials under overload, thereby disconnecting the conductive path and achieving overload power-off protection. After the overload factor is eliminated, the deformed bimetallic strip can be reset by pressing the reset button, so that the first contact piece and the second contact piece can be re-conducted to ensure the power consumption of the electrical equipment. Therefore, the entire overload protection operation is reversible, and will not cause damage to the components. Only the reset button needs to be pressed, which greatly reduces the safety risk and improves the use convenience. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0023] Figure 1 An exploded structural schematic diagram of an overload protector in the embodiment of the present application is shown;

[0024] Figure 2 A closed state structural schematic diagram of the overload protector in the embodiment of the present application is shown; Figure 1

[0025] Figure 3 An overload tripping state structural schematic diagram of the overload protector in the embodiment of the present application is shown; Figure 1

[0026] Figure 4 An internal layout structural schematic diagram of the overload protector in the embodiment of the present application is shown; Figure 1

[0027] Figure 5 A packaging state structural schematic diagram of the overload protector in the embodiment of the present application is shown; Figure 1

[0028] Figure 6 A structural schematic diagram of an upper cover of the overload protector in the embodiment of the present application is shown; Figure 1

[0029] Figure 7 A structural schematic diagram of a base of the overload protector in the embodiment of the present application is shown; Figure 1

[0030] Figure 8 A structural schematic diagram of a bimetallic strip of the overload protector in the embodiment of the present application is shown; Figure 1

[0031] Figure 9 A structural schematic diagram of a reset button of the overload protector in the embodiment of the present application is shown; Figure 1

[0032] Figure 10 An exploded structural schematic diagram of another overload protector in the embodiment of the present application is shown;

[0033] Figure 11 A closed state structural schematic diagram of the overload protector in the embodiment of the present application is shown; Figure 10

[0034] Figure 12 An overload tripping state structural schematic diagram of the overload protector in the embodiment of the present application is shown; Figure 10 ​​​​​​​​​A schematic diagram of the overload protection device in the overload circuit breaking state structure.

[0035] Figure 13 It shows Figure 10 A schematic diagram of the internal layout structure of the overload protector in the circuit;

[0036] Figure 14 It shows Figure 10 A schematic diagram of the encapsulation structure of the overload protector in the diagram;

[0037] Figure 15 It shows Figure 10 A schematic diagram of the structure of the top cover of the overload protector in the middle;

[0038] Figure 16 It shows Figure 10 A schematic diagram of the structure of the base of the overload protector in the middle;

[0039] Figure 17 It shows Figure 10 A schematic diagram of the bimetallic strip in the overload protector;

[0040] Figure 18 It shows Figure 10 A schematic diagram of the reset button of the overload protector in the circuit;

[0041] Figure 19 An exploded view of the structure of another overload protector in an embodiment of this application is shown;

[0042] Figure 20 It shows Figure 19 A schematic diagram of the closed-state structure of the overload protector in the diagram;

[0043] Figure 21 It shows Figure 19 A schematic diagram of the overload protection device in the overload circuit breaking state structure.

[0044] Figure 22 It shows Figure 19 A schematic diagram of the internal layout structure of the overload protector in the circuit;

[0045] Figure 23 It shows Figure 19 A schematic diagram of the encapsulation structure of the overload protector in the diagram;

[0046] Figure 24 It shows Figure 19 A schematic diagram of the base of the overload protector.

[0047] Figure label:

[0048] 1 - shell, 1a - base, 1b - upper cover, 11 - first contact, 11a - first insertion slot, 12 - second contact, 12a - second insertion slot, 13 - limiting rib, 14 - guide hole, 15 - guide slot, 16 - extension cylinder;

[0049] 2 - bimetallic strip, 21 - body, 211 - fixed end, 212 - free end, 212a - extension arm, 213 - window;

[0050] 3 - reset button, 31 - pressure rod, 32 - guide, 321 - first guide block, 322 - second guide block, 33 - push piece. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0052] In addition, the reference numbers and / or reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0053] The present application will be described below in conjunction with the drawings and with reference to specific embodiments:

[0054] In order to ensure the safety of electricity, in various types of electrical equipment, a one-time burnout protector is usually configured to melt and burn out under overload state, to disconnect the power supply path, thereby realizing power-off protection. However, after the overload factor is excluded, the burned-out protector needs to be removed and replaced, which makes the use and maintenance operation inconvenient, the consumable consumption cost is high, and there is a certain risk of electrical safety.

[0055] Therefore, the embodiments of the present application provide an overload protector, which aims to simplify the use and maintenance operation, reduce or even avoid consumable consumption, and also improve the electrical safety to a certain extent through reversible power-off protection.

[0056] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9In some embodiments, the overload protector utilizes the deformation of the bimetallic strip to achieve the function of overload power-off protection based on the reversible deformation of the bimetallic strip due to overload overheating, and after the overload factor is excluded, the bimetallic strip can be reset under the action of external force to reestablish the conduction path and turn on the power supply structure.

[0057] Specifically, the overload protector includes a housing 1 and a first contact 11, a second contact 12, a bimetallic strip 2 and a reset button 3 arranged in the housing 1.

[0058] The housing 1 is the installation base of the entire overload protector, and the first contact 11 and the second contact 12 serve as the wiring terminals for electrically connecting external circuit structures, are installed inside the housing 1, and have part of the main body extending out of the housing 1 to facilitate the connection of external elements. The part of the main body of the first contact 11 and the second contact 12 located in the housing 1 is connected to the fixed end 211 and the free end 212 of the bimetallic strip 2, respectively.

[0059] The bimetallic strip 2 is made of two metal strips with different thermal expansion coefficients. Due to the difference in thermal expansion coefficients, the two metal strips will deform differently under the condition of overload heat generation, causing the bimetallic strip 2 to deform stably in a certain direction as a whole. Generally, the deformation form and amplitude of the bimetallic strip 2 can be designed by pressing. The main performance is bending to one side of the plate surface, so that the bimetallic strip 2 can deform stably and disconnect the electrical connection with other elements under the condition of overload.

[0060] It is worth noting that the bimetallic strip 2 has two stable forms, i.e. the bimetallic strip 2 can switch between the two stable forms under the action of external force. The position of the bimetallic strip 2 in one stable state can be set as the position for electrical connection with other elements. When an overload state occurs, the bimetallic strip 2 will deform to a certain extent. Once the overload deformation reaches a certain extent, the bimetallic strip 2 will switch to another form and deform to disconnect the electrical connection with other elements. During the reset operation, the bimetallic strip 2 can be reset to the initial stable state position by external operation, and the electrical connection between the bimetallic strip 2 and other elements can be reestablished.

[0061] Generally, the bimetallic strip 2 can be a mature off-the-shelf product with a clear fixed end and a free end, and has two stable forms. The fixed end is fixedly connected to one conductive element, and the free end is used to adapt to another conductive element and can move between two stable positions.

[0062] The reset button 3 is movably arranged in the shell 1 and can be correspondingly overlapped on the bimetallic strip 2, so that the bimetallic strip 2 can be reset by operating the reset button 3 to deform, that is, to switch from one stable position to another stable position. Generally, the moving direction of the reset button 3 can be arranged along the overload deformation displacement direction of the free end 212 of the bimetallic strip 2, so that the bimetallic strip 2 that has been overloaded can be reset to the initial stable position by only pressing the reset button 3, so as to reestablish the contact connection between the bimetallic strip 2 and the second contact 12.

[0063] The overload protector provided by the embodiments of the present application is based on a shell, and is configured with a first contact, a second contact, a bimetallic strip, and a reset button. The first contact and the second contact can be connected to the wiring terminals in the power supply circuit of the electrical equipment, and the first contact and the second contact are connected to each other through the bimetallic strip to form a closed conductive path. It is worth noting that the bimetallic strip will be overheated and deformed under overload conditions due to the difference in thermal deformation characteristics of the two metal materials, thereby breaking the conductive path and achieving overload power-off protection. After the overload factor is eliminated, the deformed bimetallic strip can be reset by pressing the reset button, so as to re-conduct the first contact and the second contact and ensure the power consumption of the electrical equipment. Therefore, the entire overload protection operation is reversible and will not cause damage to the elements, only needs to press the reset button, greatly reduces the safety risk, and improves the use convenience.

[0064] Referring to Figure 1 , Figure 6 and Figure 7 , in some embodiments, the first insertion slot 11a and the second insertion slot 12a can be formed in the shell 1 to cooperate and fix the first contact 11 and the second contact 12.

[0065] During assembly, the first contact 11 and the second contact 12 can be directly inserted into the first insertion slot 11a and the second insertion slot 12a, which is convenient and efficient.

[0066] Generally, the arrangement positions of the first insertion slot 11a and the second insertion slot 12a can be prearranged according to the cooperation relationship with the electrical equipment. For example, the opening sides of the first insertion slot 11a and the second insertion slot 12a can be arranged on the same side of the shell 1, so that the first contact 11 and the second contact 12 extend out of the same side of the shell 1; or the first contact 11 and the second contact 12 can extend out of the shell 1 from different sides.

[0067] In some embodiments, the slot openings of the first insertion slot 11a and the second insertion slot 12a are arranged on the side of the shell, such as the slot openings of the first insertion slot 11a and the second insertion slot 12a arranged on the width direction or length direction side.

[0068] In order to facilitate processing, the slot wall of the first plug-in slot 11a and the second plug-in slot 12a can be provided with an opening.

[0069] In some embodiments, in order to adapt to different wiring requirements, the first contact piece 11 and the second contact piece 12 can be extended in the width direction of the shell 1 or in the thickness direction at one end outside the shell 1.

[0070] In some embodiments, the shell 1 can be formed by buckling the base 1a and the upper cover 1b, so that the functional structures of the shell 1 can be conveniently processed; after the first contact piece 11, the second contact piece 12, the bimetallic piece 2 and the reset button 3 are completed, the base 1a and the upper cover 1b are buckled, and the installation is completed.

[0071] In some embodiments, the first plug-in slot 11a and the second plug-in slot 12a can be respectively arranged on the base 1a and the upper cover 1b, so that the density of the slot body and other functional mechanisms on the base 1a and the upper cover 1b can be smaller, and the processing difficulty can be greatly reduced.

[0072] Generally, the first plug-in slot 11a can be arranged on the base 1a, and the second plug-in slot 12a can be arranged on the upper cover 1b, and correspondingly, the first contact piece 11 and the bimetallic piece 2 are fixed on the base 1a.

[0073] Referring to Figure 1 , Figure 5 and Figure 6 , in some embodiments, in order to thin the upper cover 1b and ensure the guiding and limiting ability of the pressure rod 31, an extension cylinder 16 can be arranged on the upper cover 1b, the extension cylinder 16 communicates with the guide hole 14 in a facing manner, so that the pressure rod 31 can be slidably embedded in the extension cylinder 16 to limit the radial displacement.

[0074] Referring to Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 In some embodiments, on the basis of the above embodiments, the cooperation mode of the reset button 3, the first contact piece 11 and the second contact piece 12 with the bimetallic piece 2 can be adaptively adjusted for the cooperation layout of the first plug-in slot 11a and the second plug-in slot 12a to meet different use requirements.

[0075] Specifically, the first plug-in slot 11a and the second plug-in slot 12a are both arranged on the base 1a, so as to reduce the difficulty of matching the guide hole 14 on the upper cover 1b with the peripheral structure.

[0076] That is, the first plug-in slot 11a and the second plug-in slot 12a are arranged adjacent to each other on the base 1a, and the guide hole 14 is arranged on the upper cover 1b.

[0077] In some embodiments, considering that one end of the bimetallic strip 2 is fixed on the first contact 11 and the other end is a free end, the bimetallic strip 2 can be deformed greatly when overloaded, and can drive the bimetallic strip 2 to deform and shift as a whole to a certain extent. When resetting, the reset button 3 pushes the bimetallic strip 2 to move and reset. In order to ensure that the bimetallic strip 2 can be stably switched to another stable state, a limiting rib 13 can be arranged on the base 1a, and the limiting rib 13 is arranged between the bimetallic strip 2 and the base 1a.

[0078] When the reset button 3 pushes the bimetallic strip 2 to reset, the limiting rib 13 can support the bimetallic strip 2, and leave enough deformation and reset space for the free end of the bimetallic strip 2.

[0079] In some embodiments, the bimetallic strip 2 can include a body 21, and the body 21 has a fixed end 211 and a free end 212. The fixed end 211 is fixedly connected with the first contact 11, and the free end 212 is a deformable end capable of deforming and switching between two stable positions.

[0080] In order to realize the deformation and switching of the bimetallic strip 2 between the two stable positions, the free end 212 is in a curved state relative to the body 21, and can deform in the opposite direction to switch to another stable position and remain in the opposite state.

[0081] In order to maintain the two stable positions, a window 213 can be arranged in the middle of the body 21, i.e. between the fixed end 211 and the free end 212. The free end 212 is provided with an extension arm 212a, and the extension arm 212a extends into the window 213. The extension arm 212a is detachably connected with the second contact 12.

[0082] That is, the normal position of the extension arm 212a is arranged to be connected with the second contact 12, so that when the bimetallic strip 2 is overloaded and deformed, the extension arm 212a moves away from the second contact 12 and breaks the electrical connection.

[0083] It is worth mentioning that in the initial state, the extension arm 212a is electrically connected with the second contact piece 12, and the free end 212 is bent away from the second contact piece 12, i.e. in the direction of the base 1a. In the overload working condition, the free end 212 of the bimetallic strip 2 is gradually bent towards the second contact piece 12 until the free end 212 is completely bent, reaching the second stable position; in this process, the extension arm 212a is pulled away from the second contact piece 12 by the free end 212.

[0084] When reset is needed, the reset button 3 is pressed to reset the free end 212, and correspondingly, the extension arm 212a will be reset to the initial position and reestablish electrical connection with the second contact piece 12.

[0085] In some embodiments, in order to maintain the reliability of the electrical connection, corresponding contacts are arranged on the extension arm 212a and the second contact piece 12 respectively, which can stably contact and electrically connect to ensure reliability.

[0086] Generally, the contacts can be copper contacts or silver contacts, which can be flexibly selected according to the selection requirements.

[0087] In some embodiments, in order to facilitate the reset operation, the reset button 3 can be directly overlapped on the extension arm 212a.

[0088] In some embodiments, due to the large movement range of the extension arm 212a and the fact that the extension arm 212a is located at the middle position of the shell 1, the overall thickness of the shell 1 will be increased to some extent, which is not conducive to assembly and installation.

[0089] Therefore, the groove body of the guide groove 15 can be designed so that part of the groove body protrudes from the outer surface of the upper cover 1b, and the groove opening is flush with the inner surface of the upper cover, so that the thickness of the shell 1 is not increased, and only in the area corresponding to the extension arm 212a, the groove body of the guide groove 15 is moved away from the extension arm 212a, so that the working needs of the extension arm 212a and the reset button 3 are met through local design.

[0090] In some embodiments, the middle part of the bimetallic strip 2 can also be formed into a spherical part by stamping, and the spherical part can switch the recess direction by pressing, i.e. the spherical part can protrude on both sides of the body 21 to achieve a similar shape maintaining function as the window 213, so as to maintain the stable position of the free end 212, i.e. maintain the initial position and the stable position after overload.

[0091] Of course, other structures of the bimetallic strip 2 can also be adopted, which are not specifically limited here, as long as they can realize the switching and maintaining of multiple stable positions.

[0092] In some embodiments, the reset button 3 can be directly overlapped on the bimetallic strip 2, such as the extension arm 212a, the free end 212 or other positions that can push the bimetallic strip 2 to reset.

[0093] Specifically, the reset button 3 can include a pressing rod 31, a guide 32 and a pushing piece 33; the guide 32 is connected with the pressing rod 31, and the pushing piece 33 can be connected with the guide 32 or the pressing rod 31.

[0094] The pressing rod 31 is movably embedded in the guide hole 14 on the shell 1, and part of the pressing rod 31 can move out of the upper cover 1b, and the other part is located in the shell 1.

[0095] The guide 32 is used to define the position and movement track of the pressing rod 13 and the pushing piece 33, so as to ensure that the reset button 3 can stably push the bimetallic strip 2 to reset. The guide 32 can be matched with the guide groove 15 arranged in the shell 1, that is, the guide 32 is slidably embedded in the guide groove 15.

[0096] The pushing piece 33 is an element directly contacting the bimetallic strip 2, such as being directly overlapped on the extension arm 212a or the free end 212, and can be actuated by the guide 32 or the pressing rod 31 to push the bimetallic strip 2.

[0097] In some embodiments, the guide groove 15 can be provided as two, matched with both ends of the guide 32, so as to ensure the reliability of the guiding operation.

[0098] In some embodiments, the guide 32 can be provided as two, and the two guides 32 are orthogonally arranged, so as to be able to limit the deviation amplitude of the guide 32 in the guide groove 15, and ensure the reliability of the guiding operation.

[0099] In some embodiments, the guide 32 can adopt a long strip-shaped block, and both ends are slidably embedded in the guide groove 15.

[0100] Generally, the guide 32 has a first guide block 321 and a second guide block 322 arranged orthogonally, the guide direction of the first guide block 321 is arranged along the movement direction of the pressing rod 31, and the second guide block 322 is arranged along the orthogonal direction of the movement direction of the pressing rod 31, so as to form an orthogonal frame to realize stable limiting and also consider the guiding function.

[0101] In some embodiments, the pressing rod 31 is a cylindrical rod, and the guide hole 14 is also a circular hole, so as to realize smooth movement.

[0102] In some embodiments, the pushing piece 33 can be arranged as a boss on the guide piece 32, and can be arranged on the bottom surface of the side of the guide piece 32 close to the bimetallic strip 2, or can be arranged on the side surface.

[0103] In order to adapt to the width of the free end 212, the pushing piece 33 can be arranged as multiple, such as two or three.

[0104] In some embodiments, in order to reduce the overall thickness of the overload protector, the pushing piece 33 can be arranged at the middle region of the length direction of the upper cover 1b, and the pushing piece 33 is overlapped on the extension arm 212a. The pushing piece 32 can be arranged as one.

[0105] Alternatively, the pushing piece 33 can be arranged at the edge region of the length direction of the upper cover 1b, and the pushing piece 33 is overlapped on the free end 212. The pushing piece 32 can be arranged as multiple.

[0106] Referring to Figure 19 , Figure 20 , Figure 21 , Figure 22 , Figure 23 and Figure 24 , in some embodiments, the first contact piece 11 and the second contact piece 12 can also be arranged at the opposite sides along the width direction of the shell 1.

[0107] Correspondingly, the openings of the first insertion slot 11a and the second insertion slot 12a are also arranged at the opposite sides along the width direction of the shell 1.

[0108] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0109] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0110] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0111] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0112] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0113] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0114] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0115] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and deformations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An overload protector characterized by, The application relates to a reset button. The shell is provided with a first contact piece and a second contact piece, and a guide hole is formed in the shell. A bimetallic strip is arranged in the shell, and a first end of the bimetallic strip is electrically connected with the first contact piece, and a second end of the bimetallic strip is electrically connected with the second contact piece in a detachable mode. A reset button is slidably arranged in the guide hole, and one end of the reset button arranged in the shell is overlapped with the second end of the bimetallic strip, and the moving direction of the reset button is arranged along the displacement direction of the overload deformation of the second end of the bimetallic strip.

2. The overload protector of claim 1, wherein, The shell is provided with a first insertion slot and a second insertion slot, and the first contact piece and the second contact piece are inserted into the first insertion slot and the second insertion slot.

3. The overload protector of claim 2, wherein, The shell comprises a clamped upper cover and a base, one of the first insertion slot and the second insertion slot is arranged on the upper cover, and the other is arranged on the base.

4. The overload protector of claim 3, wherein, The base is provided with a limiting rib, and the limiting rib is arranged on the side of the bimetallic strip close to the base.

5. The overload protector of claim 3, wherein, A window is formed between the first end and the second end of the bimetallic strip, the second end of the bimetallic strip is provided with an extension arm extending into the window, the extension arm is detachably connected with the second contact piece, the reset button is overlapped with the extension arm, and the normal position of the extension arm is arranged at the position connected with the second contact piece, so that the extension arm is away from the second contact piece and the electrical connection is disconnected when the bimetallic strip is overloaded and deformed.

6. The overload protector of claim 5, wherein, The reset button comprises: A pressure rod movably arranged in the guide hole; A guide piece connected with the pressure rod and movably embedded in a guide groove in the shell; A pushing piece connected with the guide piece or the pressure rod and overlapped with the extension arm or the second end of the bimetallic strip.

7. The overload protector of claim 6, wherein, The guide hole is a circular hole, and the pressure rod part is a cylindrical rod.

8. The overload protector of claim 7, wherein, The shell is provided with an extension cylinder in communication with the guide hole, and the extension cylinder is sleeved on the outer side of the pressure rod.

9. The overload protector of claim 6, wherein, The guide piece is two pieces, and the two pieces are arranged in the guide groove in a perpendicular mode.

10. The overload protector of claim 9, wherein, Part of the groove body of the guide groove protrudes from the outer surface of the upper cover, and the groove opening of part of the groove body of the guide groove is flush with the inner surface of the upper cover.

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