Power supply overload protector

Abstract

The utility model provides a power supply overload protector, which comprises a hollow protector shell and a pressing rod arranged at the upper end of the protector shell, a reset spring is sleeved outside the pressing rod, a power supply input terminal and a power supply output terminal are further arranged in the protector shell, the power supply output terminal is connected with a movable contact piece, and the movable contact piece is connected with a power supply. A movable contact is fixedly arranged at one end, back on to the power output terminal, of the movable contact piece, the static contact piece is correspondingly arranged on the power input terminal, a static contact is fixedly arranged at one end, facing the power input terminal, of the static contact piece, the interior of the pressing rod is hollow to form a containing cavity, a circuit board is inserted into the side portion of the pressing rod, and a display lamp for illuminating the containing cavity is arranged on the circuit board. And one end of the circuit board is conductively connected with the movable contact piece, and the other end of the circuit board is connected with a connecting pin which enables the circuit board to form a loop. The power supply overload protector can overcome the defect that the overload protector is damaged due to the fact that a user restarts the overload protector for many times without knowing the situation in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to overload protector technical field, concretely relates to a power overload protector. BACKGROUND

[0002] Current overload protector is a kind of when the overloading or short circuit of circuit is automatically cut off power supply, to protect electrical equipment from damage and prevent the occurrence of fire and other safety accidents, in the prior art, in the patent with the patent number CN108010822A, a kind of current overload protector is internally provided with bimetallic strip, bimetallic strip is provided with moving contact, protector is internally provided with static contact, moving contact and static contact contact form closed loop when normal operation, current is supplied to electric appliance by bimetallic strip, when overcurrent occurs, excessive current makes bimetallic strip heat, deformation, moving contact is separated from static contact, to cut off power supply loop, but this power overload protector can switch power supply protection, but cannot express information to outside to prompt user circuit is in overload state, to lead to even when circuit is in overload state, user is unaware of situation multiple restart overload protector and lead to overload protector is damaged. UTILITY MODEL CONTENTS

[0003] Therefore, the technical problem to be solved by the utility model lies in overcoming the defect that user is unaware of situation multiple restart overload protector and lead to overload protector is damaged in the prior art, to provide a kind of power overload protector that can use light to prompt user.

[0004] For this purpose, the utility model provides a kind of power overload protector, including the protector shell of inside hollow and the press bar of being set to the upper end of protector shell, the press bar is externally equipped with reset spring, the protector shell inside is also provided with power input terminal and power output terminal, the power output terminal is connected with moving contact piece, the one end of moving contact piece is fixed with moving contact, static contact piece is correspondingly arranged on power input terminal, the one end of static contact piece is fixed with static contact towards power input terminal, the moving contact piece has the power-on state that moving contact and static contact contact and the power-off protection state that moving contact and static contact are separated, the press bar is hollow and forms accommodating cavity inside, press bar side is inserted with circuit board, the display lamp of illuminating accommodating cavity is provided on the circuit board, one end of the circuit board is electrically connected with moving contact piece, and the other end is connected with the connecting pin that makes circuit board form loop.

[0005] Further, the electrically-conductive spring is arranged between the moving contact piece and the circuit board, the moving contact piece is provided with wrapping pieces wrapped on both sides of the press bar, the wrapping pieces on both sides are clamped with the side wall of the press bar, a connecting piece is further arranged between the two opposite wrapping pieces, the connecting piece and the wrapping pieces form a "U" shaped structure, and a pressing block for pressing the moving contact piece is arranged below the connecting piece.

[0006] Further, the pressing block is in contact with the arc surface of the movable contact, the conductive spring is arranged inside the pressing rod and between the lower end surface of the circuit board and the connecting piece, one end of the circuit board is inserted into the accommodating cavity, the other end extends towards the side of the connecting piece, the elastic member is sleeved between the circuit board and the connecting piece, and the embedding groove is arranged below the circuit board for embedding the elastic member.

[0007] Further, the protector shell is composed of the base and the cover plate, the upper positioning block and the lower positioning block for embedding the movable contact are arranged on the base, the positioning groove for embedding the end of the movable contact is formed between the oppositely arranged upper positioning block and lower positioning block, and the end of the movable contact away from the positioning groove is in abutment with the power output terminal.

[0008] Further, the first insulating plate for separating the power input terminal and the power output terminal is arranged between the power input terminal and the power output terminal, and the second insulating plate for separating the power output terminal and the connecting piece is arranged between the power output terminal and the connecting piece.

[0009] Further, the crimping plate for crimping the power input terminal is arranged at the lower positioning block.

[0010] Further, the buckle structure for connecting the base and the cover plate is arranged on the inner side of the base and the cover plate, the buckle structure comprises the buckle block arranged on one side of the base and the cover plate and the buckle groove matched with the buckle block on the other side.

[0011] Further, the positioning cover wrapped around the outer side of the pressing rod is arranged on the protector shell, the opening for extending the end of the pressing rod is arranged on the positioning cover, and the positioning cover is integrally formed with the protector shell. The technical scheme has the following advantages:

[0012] 1. The utility model provides a kind of power overload protector, when movable contact is in energized state, movable contact and static contact adhere, compared with prior art, the side of the pressing rod of the present embodiment is provided with circuit board, the cavity of formation in the pressing rod is inserted from the side of the pressing rod, so that the display lamp on circuit board is located on the central axis of accommodating cavity, and one end of circuit board and movable contact are electrically connected, the other end is connected by connecting pin and forms electric circuit, when movable contact and static contact contact, current will flow on movable contact, part of current on movable contact will flow to circuit board to power display lamp, display lamp illuminates accommodating cavity, to inform user power protector is in working condition, when current overload, high temperature generated on movable contact will drive movable contact and static contact separate, at this time movable contact switches from energized state to power-off protection state, at this time no current on movable contact, circuit board cannot be powered, then the light of display lamp is extinguished, can prompt user power overload protector is in current overload state, then user will reduce plug-in of plug-in board, to realize man-machine information interaction while better protection of power overload protector and plug-in board, prevent the occurrence of fire.

[0013] 2. The utility model provides a kind of power overload protector, by the setting of electrically conductive spring, can play the role of electric conduction between movable contact and circuit board, electrically conductive spring can provide upward thrust for circuit board, to enable circuit board to be stably embedded in accommodating cavity, two pieces of wrapping sheet are provided on movable contact and the connecting sheet between two pieces of wrapping sheet, the side wall of pressing rod is provided with clamping block, two pieces of wrapping sheet are provided with clamping groove, when installing, clamping block and clamping groove are clamped together, to effectively improve the connection strength between pressing rod and movable contact, improve the connection tightness of both, the lower of connecting sheet is provided with pressing block, when movable contact switches from power-off protection state to energized state, pressing rod moves downward, driving pressing block extrudes movable contact on movable contact, so that movable contact and static contact contact form energization. ACCURATE DRAWINGS

[0014] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0015] Figure 1 It is the schematic diagram of the three-dimensional structure of power overload protector;

[0016] Figure 2 It is the schematic diagram of the cross-sectional structure of power overload protector;

[0017] Figure 3 For Figure 2 Enlarged view of middle A part;

[0018] Figure 4 For the connection structure between the moving contact and the pressing rod schematic diagram;

[0019] Figure 5 For power overload protector cross-sectional structure schematic diagram.

[0020] Explanation of reference signs:

[0021] 1, protector shell; 11, base; 12, cover plate; 2, pressing rod; 21, reset spring; 22, containing cavity; 3, power input terminal; 31, power output terminal; 4, moving contact; 41, moving contact point; 42, conductive spring; 43, wrapping piece; 44, connecting piece; 45, pressing block; 5, static contact; 51, static contact point; 6, circuit board; 61, display lamp; 62, connecting foot; 63, elastic piece; 64, embedding groove; 7, upper positioning block; 71, lower positioning block; 72, positioning groove; 8, first insulating plate; 81, second insulating plate; 82, pressure contact plate; 9, buckling structure; 91, buckling block; 92, buckling groove; 93, positioning cover; 94, square groove; 95, extension foot. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and 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 a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication.For ordinary skilled in the art, the above terms can be understood in the utility model in the concrete meaning of the specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0026] Embodiment

[0027] The embodiment provides a power overload protector, which comprises an internally hollow protector shell 1 and a pressing rod 2 arranged at the upper end of the protector shell 1, the pressing rod 2 is externally sleeved with a reset spring 21, the protector shell 1 is internally further provided with a power input terminal 3 and a power output terminal 31, the power output terminal 31 is connected with a movable contact piece 4, one end of the movable contact piece 4 away from the power output terminal 31 is fixedly provided with a movable contact 41, a stationary contact piece 5 is correspondingly arranged on the power input terminal 3, one end of the stationary contact piece 5 towards the power input terminal 3 is fixedly provided with a stationary contact 51, the movable contact piece 4 has a power-on state that the movable contact and the stationary contact are in contact and a power-off protection state that the movable contact and the stationary contact are separated, the pressing rod 2 is internally hollow to form a containing cavity 22, a circuit board 6 is inserted at the side of the pressing rod 2, the circuit board 6 is provided with a display lamp 61 illuminating the containing cavity 22, one end of the circuit board 6 is electrically connected with the movable contact piece 4, and the other end is connected with a connecting pin 62 penetrating out of the protector shell 1 to form a loop of the circuit board 6.

[0028] The specific improvement is that Figures 1-5As shown, when the movable contact 4 is in the energized state, the movable contact 4 and the static contact 5 are attached, and the power overload protector is placed in the power strip, for example, the rated current of a general power strip is 15A, when the power strip has many sockets and is full, the current passing through the power strip will be higher than the rated current, then the movable contact 4 will jump upwards, so that the movable contact 41 and the static contact 51 are separated, the user may unknowingly think that the switch of the power strip is not turned on, and then press the switch again, so that the movable contact 41 and the static contact 51 are in contact again, the power strip switch is easy to be damaged after passing through the current exceeding the rated current for a long time, compared with the prior art, the line board 6 is arranged on the side of the pressing rod 2, the line board 6 is inserted from the side of the pressing rod 2, so that the display lamp 61 on the line board 6 is located on the central axis of the accommodating cavity 22, and one end of the line board 6 is in conductive connection with the movable contact 4, and the other end is connected out through the connecting foot 62 to form an electric circuit, when the movable contact 41 and the static contact 51 are in contact, current will be generated on the movable contact 4, part of the current on the movable contact 4 will flow to the line board 6 to power the display lamp 61, the display lamp 61 illuminates the accommodating cavity 22, thereby informing the user that the power protector is in working condition, when the current is overloaded, the high temperature generated on the movable contact 4 will drive the movable contact 41 and the static contact 51 to separate, at this time the movable contact 4 is switched from the energized state to the power-off protection state, at this time there is no current on the movable contact 4, so that the line board 6 cannot be powered, and the light of the display lamp 61 is extinguished, which can prompt the user that the power overload protector is in the current overload state, so that the user will reduce the plug-in of the power strip, thereby realizing human-computer information interaction and better protecting the power overload protector and the power strip, and preventing the occurrence of fire, wherein the power overload protector in the embodiment can be widely applied to household office power strip, household wall socket and industrial power strip, and can also be applied to power sockets and ground sockets in different fields.

[0029] On the basis of the above embodiment: the movable contact 4 and the line board 6 are provided with a conductive spring 42, the movable contact 4 is provided with a wrapping piece 43 wrapped on both sides of the pressing rod 2, both sides of the wrapping piece 43 are clamped with the side wall of the pressing rod 2, and a connecting piece 44 is further arranged between the two opposite wrapping pieces 43, the connecting piece 44 and the wrapping piece 43 form a "U" type structure, and a pressing block 45 for pressing the movable contact 4 is arranged below the connecting piece 44.

[0030] The specific improvement is that: the conductive spring 42 can conduct electricity between the moving contact 4 and the circuit board 6, and the conductive spring 42 can provide an upward thrust to the circuit board 6, so that the circuit board 6 can be stably embedded in the accommodating cavity 22. The moving contact 4 is provided with two wrapping pieces 43 and a connecting piece 44 between the two wrapping pieces 43. The side wall of the pressing rod 2 is provided with a clamping block, and the two wrapping pieces 43 are provided with clamping grooves. During installation, the clamping block and the clamping groove are clamped together, thereby effectively improving the connection strength between the pressing rod 2 and the moving contact 4, and improving the connection tightness of the two. The lower side of the connecting piece 44 is provided with a pressing block 45. When the moving contact 4 switches from the power-off protection state to the power-on state, the pressing rod 2 moves downward, driving the pressing block 45 to press the moving contact 41 on the moving contact 4 downward, so that the moving contact 41 and the static contact 51 are in contact to form power-on.

[0031] On the basis of the above embodiment: the surface of the pressing block 45 in contact with the moving contact 4 is an arc surface, the conductive spring 42 is arranged inside the pressing rod 2 and between the lower end surface of the circuit board 6 and the connecting piece 44, one end of the circuit board 6 is inserted into the accommodating cavity 22, the other end extends towards one side of the connecting foot 62, and the circuit board 6 and the connecting foot 62 are sleeved with an elastic element 63, and the lower side of the circuit board 6 is provided with an embedding groove 64 for embedding the elastic element 63.

[0032] The specific improvement is that: in order to avoid damage to the moving contact 41 when the pressing block 45 moves downward, the surface of the pressing block 45 in contact with the moving contact 4 is an arc surface. When the pressing rod 2 moves downward, the circuit board 6 will also move downward, and the end of the circuit board 6 provided with a resistor element will also move downward. The circuit board 6 is provided with a display lamp 61 and a resistor element. The display lamp 61 is arranged on the left side of the circuit board 6, and the resistor element is arranged on the right side of the circuit board 6. Through the arrangement of the resistor element, the display lamp 61 can be better protected. When the circuit board 6 moves downward, the circuit board 6 will press the elastic element 63 sleeved on the connecting foot 62, and the elastic element 63 is in a pressed state at this time. At the same time, the elastic element 63 accumulates elastic potential energy. When the moving contact 41 and the static contact 51 are separated, the elastic element 63 will release the elastic potential energy, driving the circuit board 6 to move upward. In order to effectively fix the elastic element 63, an extension foot 95 is arranged at one end of the connecting foot 62 connected with the elastic element 63 and penetrates the middle of the elastic element 63.

[0033] On the basis of the above embodiment: the protector housing 1 is composed of a base 11 and a cover plate 12, the base 11 is provided with an upper positioning block 7 and a lower positioning block 71 for embedding the moving contact 4, and the upper positioning block 7 and the lower positioning block 71 are oppositely arranged to form a positioning groove 72 for embedding the end of the moving contact 4. The end of the moving contact 4 away from the positioning groove 72 abuts against the power output terminal 31.

[0034] The specific improvement is that the protector shell 1 is composed of a base 11 and a cover plate 12, and during installation, each component is installed on the base 11, and then the cover plate 12 is covered on the base 11, and in order to effectively fix the position of the moving contact 4, an upper positioning block 7 and a lower positioning block 71 are arranged on the base 11, and during installation, one end of the moving contact 4 is embedded in a positioning groove 72 between the upper positioning block 7 and the lower positioning block 71, and the other end is in contact with the power output terminal 31 to form a power supply.

[0035] On the basis of the above embodiment: a first insulating plate 8 is arranged between the power input terminal 3 and the power output terminal 31 to separate them, and a second insulating plate 81 is arranged between the power output terminal 31 and the connecting pin 62 to separate them.

[0036] The specific improvement is that in order to increase the insulation between each part and better protect the power overload protector, a first insulating plate 8 is arranged between the power input terminal 3 and the power output terminal 31 to separate them, and a second insulating plate 81 is arranged between the power output terminal 31 and the connecting pin 62 to separate them, and through the arrangement of the first insulating plate 8 and the second insulating plate 81, the power input terminal 3, the power output terminal 31 and the connecting pin 62 can be effectively separated to prevent arc.

[0037] On the basis of the above embodiment: a crimping plate 82 is arranged at the lower positioning block 71 to crimp the power input terminal 3.

[0038] The specific improvement is that in order to further fix the position of the static contact 51 and ensure that the moving contact 41 and the static contact 51 can normally open and close, a crimping plate 82 is arranged at the lower positioning block 71 to crimp the power input terminal 3, and through the arrangement of the crimping plate 82, the position of the crimping plate 3 can be better fixed, and at the same time, the base 11 is also provided with a limiting extension groove wrapping the power input terminal 3, the power output terminal 31 and the connecting pin 62.

[0039] On the basis of the above embodiment: a buckle structure 9 is arranged on the inner side of the base 11 and the cover plate 12 to connect them, and the buckle structure 9 includes a buckle block 91 arranged on one side of the base 11 and the cover plate 12, and a buckle groove 92 on the other side matched with the buckle block 91.

[0040] The specific improvement is that: the rivet type riveting between the base 11 and the cover plate 12 is replaced by a buckle structure 9 arranged at the inner side wall of the base 11 and the cover plate 12, an extension block arranged on the cover plate 12, and a buckle groove 92 arranged in the extension block; during installation, the cover plate 12 is arranged on the base 11, and the extension block is inserted along the guide slope of the buckle block 91 until the buckle block 91 is buckled in the buckle groove 92; when the parts need to be replaced or repaired, a square groove 94 is arranged on the base 11, and a screwdriver is inserted into the square groove 94 to separate the buckle block 91 and the buckle groove 92.

[0041] On the basis of the above embodiment: the protector shell 1 is provided with a positioning cover 93 wrapped outside the pressing rod 2, the positioning cover 93 is provided with an opening for the end of the pressing rod 2 to extend out, and the positioning cover 93 is integrally formed with the protector shell 1.

[0042] The specific improvement is that: in the prior art, the positioning cover 93 and the protector shell 1 need to be assembled later, while in the embodiment, the positioning cover 93 and the protector shell 1 can be integrally formed, saving the installation process; the end of the pressing rod 2 extends out of the positioning cover 93, which is used to indicate the working state of the power overload protector, and when the moving contact 41 and the static contact 51 are separated, the user needs to press the pressing rod 2 again to make the moving contact 41 and the static contact 51 re-contact and power on.

[0043] Obviously, the above embodiment is only an example for clear illustration, and is not a limitation on the implementation. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the implementation is not required or can not be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A power overload protector, comprising an internally hollow protector shell (1) and a pressing rod (2) arranged at the upper end of the protector shell (1), an external reset spring (21) is arranged on the pressing rod (2), the protector shell (1) is internally provided with a power input terminal (3) and a power output terminal (31), a movable contact piece (4) is connected to the power output terminal (31), one end of the movable contact piece (4) away from the power output terminal (31) is fixedly provided with a movable contact (41), a stationary contact piece (5) is correspondingly arranged on the power input terminal (3), one end of the stationary contact piece (5) toward the power input terminal (3) is fixedly provided with a stationary contact (51), the movable contact piece (4) has a power-on state in which the movable contact (41) is in contact with the stationary contact (51) and a power-off protection state in which the movable contact (41) is separated from the stationary contact (51), characterized in that: The press lever (2) is internally hollow to form a containing cavity (22), a circuit board (6) is inserted on the side of the press lever (2), the circuit board (6) is provided with a display lamp (61) illuminating the containing cavity (22), one end of the circuit board (6) is in conductive connection with the movable contact (4), and the other end is connected with a connecting pin (62) forming a loop of the circuit board (6).

2. A power overload protector according to claim 1, wherein: The movable contact (4) is provided with a conductive spring (42) between the movable contact (4) and the circuit board (6), the movable contact (4) is provided with a wrapping piece (43) wrapped on both sides of the press lever (2), the wrapping pieces (43) on both sides are clamped with the side wall of the press lever (2), and a connecting piece (44) is further arranged between the two opposite wrapping pieces (43). The connecting piece (44) and the wrapping piece (43) form a "U" type structure, and a pressing block (45) for pressing the movable contact (4) is arranged below the connecting piece (44).

3. A power overload protector according to claim 2, wherein: The surface of the pressing block (45) in contact with the movable contact (4) is a curved surface, the conductive spring (42) is arranged inside the press lever (2) and located between the lower end surface of the circuit board (6) and the connecting piece (44), one end of the circuit board (6) is inserted into the containing cavity (22), the other end extends towards one side of the connecting pin (62), and a elastic piece (63) is sleeved between the circuit board (6) and the connecting pin (62). The circuit board (6) is provided with an embedding groove (64) below for embedding the elastic piece (63).

4. A power overload protector according to any one of claims 1 to 3, wherein: The protector shell (1) is composed of a base (11) and a cover plate (12), the base (11) is provided with an upper positioning block (7) and a lower positioning block (71) for embedding the movable contact (4), the upper positioning block (7) and the lower positioning block (71) are oppositely arranged to form a positioning groove (72) for embedding the end of the movable contact (4), and the end of the movable contact (4) away from the positioning groove (72) is in abutment with the power output terminal (31).

5. A power overload protector according to claim 4, wherein: The first insulating plate (8) is arranged between the power input terminal (3) and the power output terminal (31) for separating the two, and the second insulating plate (81) is arranged between the power output terminal (31) and the connecting pin (62) for separating the two.

6. A power overload protector according to claim 5, wherein: The lower positioning block (71) is provided with a crimping plate (82) for crimping the power input terminal (3).

7. A power overload protector according to claim 6, wherein: The inner side surfaces of the base (11) and the cover plate (12) are provided with a buckling structure (9) for connecting the two, the buckling structure (9) comprises a buckling block (91) arranged on one of the base (11) and the cover plate (12) and a buckling groove (92) arranged on the other one and matched with the buckling block (91).

8. A power overload protector according to claim 7, wherein: The protector shell (1) is provided with a positioning cover (93) wrapped on the outer side surface of the press lever (2), the positioning cover (93) is provided with an opening for the end of the press lever (2) to extend out, and the positioning cover (93) is integrally formed with the protector shell (1).

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