CN111952123B

CN111952123B - An overload protector and an installation method thereof

Info

Publication number: CN111952123B
Application number: CN202010680708.1A
Authority: CN
Inventors: 傅群
Original assignee: Hangzhou Dongchan Temperature Control Equipment Co ltd
Current assignee: Hangzhou Dongchan Temperature Control Equipment Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2025-04-29
Anticipated expiration: 2040-07-15
Also published as: CN111952123A

Abstract

The invention discloses an overload protector and an installation method thereof, the overload protector comprises a protection shell, a first pin and a second pin, wherein a key-type overload protection switch is arranged at the top of the protection shell, a metal spring is arranged in the protection shell, a connecting block is arranged at one end of the metal spring, the bottom of the connecting block is arranged in the protection shell and is provided with a slot matched with the metal spring, one end of the metal spring is connected with the connecting block through the slot, the top of the connecting block penetrates through the protection shell and is connected with the key-type overload protection switch, the other end of the metal spring is fixedly connected with the first pin, one end of the first pin is fixedly connected with the metal spring, the other end of the first pin penetrates through the protection shell and is arranged at the bottom of the protection shell, a moving contact is arranged on the metal spring, one end of the second pin is arranged in the protection shell and is provided with a fixed contact corresponding to the moving contact, and the other end of the second pin penetrates through the protection shell and is arranged at the bottom of the protection shell. The invention has the beneficial effect of automatically disconnecting the circuit.

Description

Overload protector and installation method thereof

Technical Field

The invention relates to the technical field of switches, in particular to an overload protector and an installation method thereof.

Background

With the continuous development of society, people's quality of life is constantly improved, and various consumer appears in the life, with domestic appliance and circuit constantly ageing, or the electrical apparatus misuse, all take place circuit overload or incident such as short circuit easily, if set up overload protector and installation method between electrical apparatus and house circuit's socket additional, will effectually reduce the probability that takes place the incident.

Particularly, when overload phenomenon occurs in the household electrical appliance, and when the household electrical appliance is abnormal in use, the current is too high or the temperature is too high, the existing plug device cannot automatically disconnect the circuit because of the lack of an automatic power-off function, so that the damage of the electrical appliance and even fire disaster are easily caused, and extremely serious consequences are brought.

Disclosure of Invention

The invention provides an overload protector capable of automatically disconnecting a circuit and an installation method thereof, and aims to overcome the defect that the circuit cannot be automatically disconnected under the abnormal condition in the using process of an electric appliance in the prior art.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides an overload protector, it includes protection casing, first and second of pin, the top of protection casing is equipped with button overload protection switch, be equipped with the metal shell fragment in the protective housing, the one end of metal shell fragment is equipped with the connecting block, the bottom of connecting block is located the protective housing and is equipped with the slot with metal shell fragment assorted, the one end of metal shell fragment is passed through the slot and is connected with the connecting block, the top of connecting block runs through protection casing and is connected with button overload protection switch, the other end and the first fixed connection of pin of metal shell fragment, the one end and the metal shell fragment fixed connection of first of pin, the other end of first of pin runs through protection casing and is located the bottom of protection casing, be equipped with the moving contact on the metal shell fragment, the one end of second of pin is located the protective housing and is equipped with the fixed contact corresponding with the moving contact, the other end of second of pin runs through protection casing and is located the bottom of protection casing.

The top of protection casing is equipped with button overload protection switch, be equipped with metal shrapnel in the protective housing, the one end of metal shrapnel is equipped with the connecting block, the bottom of connecting block is located the protective housing and is equipped with the slot with metal shrapnel assorted, the one end of metal shrapnel is passed through the slot and is connected with the connecting block, protection casing is run through at the top of connecting block and is connected with button overload protection switch, the other end and the first fixed connection of pin of metal shrapnel, the one end and the metal shrapnel fixed connection of pin, the other end and the bottom that just is located protection casing of pin one run through protection casing, be equipped with the moving contact on the metal shrapnel, the one end of pin two is located the protective housing and is equipped with the fixed contact corresponding with the moving contact, the other end and runs through protection casing and be located protection casing's bottom of pin two. The first pin is electrically connected with an external power supply, the second pin is electrically connected with the equipment, when the circuit is connected, the moving contact on the metal spring plate and the fixed contact on the second pin are in a contact state, the current of the power supply flows into the equipment through the first pin, the metal spring plate and the pins in sequence, a user can control the connection or disconnection of the circuit through a key-type overload protection switch, the key-type overload protection switch drives the metal spring plate to act through a connecting block, the moving contact on the metal spring plate is in contact with or separated from the fixed contact on the second pin, the control is convenient, the safety performance is greatly improved, in addition, when an overload phenomenon occurs, the metal spring plate is deformed, the moving contact on the metal spring plate is automatically separated from the fixed contact on the second pin, the current is disconnected, the equipment is protected from damage, and the aim of automatically disconnecting the circuit is achieved.

Preferably, the button overload protection switch comprises a limit cylinder, a bottom plate, a locking piece and a pressure bar, wherein the bottom of the limit cylinder is detachably connected with the top of a protection shell, the bottom plate, the locking piece and the pressure bar are circular and are positioned in the limit cylinder, the inside of the locking piece and the inside of the pressure bar are hollow, the top of the locking piece is positioned in the pressure bar, the bottom of the locking piece is provided with a plurality of guide blocks which are uniformly distributed along the circumferential direction of the locking piece and are positioned outside the locking piece, a sliding groove I is formed between every two adjacent guide blocks, the top of the guide block is close to the pressure bar and is provided with an N-shaped inclined guide groove, the bottom of the guide block is far away from the pressure bar, the top of the pressure bar is sealed and penetrates the top of the limit cylinder, the bottom of the pressure bar is provided with a plurality of arc plates corresponding to the guide blocks, a sliding groove II corresponding to the sliding groove I is formed between every two adjacent arc plates, the limiting cylinder is internally provided with a plurality of sliding strips which are respectively matched with the first sliding groove and the second sliding groove, the top of the sliding strips is fixedly connected with the top of the limiting cylinder, the bottom of the sliding strips is provided with a guiding inclined plane which is matched with the N-type inclined guide groove, one of the arc plates is fixedly connected with the connecting block, the arc plates are provided with guiding teeth which are matched with the N-type inclined guide groove, the compression bar is meshed with the N-type inclined guide groove through the guiding teeth on the arc plates and is connected with the locking piece, the bottom of the locking piece is rotationally connected with the bottom plate, a spring is arranged in the locking piece, the top of the locking piece is sealed, one end of the spring is contacted with the top of the locking piece, the other end of the spring penetrates through the bottom of the locking piece and is contacted with the top of the bottom plate, the bottom of the bottom plate is contacted with the top of the protecting shell, and the bottom plate is detachably connected with the bottom of the limiting cylinder. The design is favorable to the user to apply a decurrent pressure through for the depression bar, and the guide tooth on the depression bar meshes the transmission with the N type inclined guide groove on the locking piece mutually, and the locking piece rotates for the guide tooth produces the displacement of vertical direction in the inclined guide groove of N type, thereby makes the depression bar drive the connecting block and produces the displacement of vertical direction, and the connecting block drives the moving contact on the metal shrapnel and the fixed contact or the separation on the pin two, thereby has realized switching on or off through the manual control circuit, reasonable in design, convenient to operate.

As the preference, the side of bottom plate is equipped with two L type pieces, two L type pieces are the front and back symmetric distribution with the bottom plate as the center, the one end of L type piece and the side fixed connection of bottom plate, the other end of L type piece is equipped with the turn-ups, the turn-ups constitutes a Z type structure with L type piece, the outside front and back both sides of spacing section of thick bamboo all are equipped with the installation piece, the installation piece is located the bottom of spacing section of thick bamboo, be equipped with on the installation piece with L type piece assorted through-hole, be equipped with in the through-hole with turn-ups assorted mounting panel, the turn-ups on the bottom plate passes through on the L type piece and mounting panel assorted is installed on the installation piece of spacing section of thick bamboo, the outside left and right sides of spacing section of thick bamboo all is equipped with the fixture block, the shape of fixture block is the cube, two fixture blocks are bilateral symmetric distribution and are parallel to each other, the fixture block is located the bottom of spacing section of thick bamboo, spacing section of thick bamboo passes through fixture block and protective housing's top detachable connection. The bottom plate slides into the through hole through the L-shaped block, and the flanging on the L-shaped block is arranged on the mounting plate in the through hole, so that the key-type overload protection switch is conveniently arranged on the protection shell in an integral mode through the clamping block, and the installation and the disassembly are convenient.

Preferably, the lateral wall of the pressure bar is provided with a connecting cross bar, one end of the connecting cross bar is fixedly connected with one of the arc plates, the other end of the connecting cross bar is provided with an L-shaped bar, the top of the connecting block is provided with a U-shaped groove, one end of the L-shaped bar is fixedly connected with the connecting cross bar, the other end of the L-shaped bar is positioned in the U-shaped groove and is detachably connected with the connecting block through the U-shaped groove, the limiting cylinder is provided with a chute matched with the connecting cross bar, and the pressure bar is in sliding connection with the limiting cylinder up and down through the connecting cross bar and the chute. The user passes through the depression bar through pressing, and the depression bar drives the displacement that the connecting block produced vertical direction through the L type pole on the connection horizontal pole, and the connecting block drives the moving contact on the metal shrapnel and the static contact on the pin two or separation, is convenient for realize through the switch-on or the disconnection of manual control circuit.

As the preference, the protective housing includes casing and lower casing, go up casing and lower casing and can dismantle the connection, upward be equipped with two locating pieces on the casing, the shape of locating piece is rectangular shape, two locating pieces are bilateral symmetry and distribute and be parallel to each other, be equipped with on the locating piece with fixture block assorted mounting groove, one side and spacing section of thick bamboo fixed connection of fixture block, the opposite side of fixture block is equipped with the buckle, be equipped with in the mounting groove with buckle assorted draw-in groove, L type pole is located wherein between locating piece and the connecting block, the top of connecting block is run through the last casing and can dismantle with L type pole through U type groove and be connected. The button overload protection switch slides into the mounting groove on the positioning block through the clamping block in an integral mode, and finally the installation of the button overload protection switch is completed when the clamping buckle slides into the clamping groove, so that the position stability of the button overload protection switch is improved.

Preferably, the first pin and the second pin are both L-shaped, one side of the first pin is fixedly connected with the metal elastic sheet, the other side of the first pin penetrates through the bottom of the lower shell and is provided with a connecting sheet, the second pin is located on the side face of the metal elastic sheet, one end of one side of the second pin is fixedly connected with the fixed contact, and the other end of the second pin penetrates through the side wall of the lower shell and is fixedly connected with the other side. When the circuit is overloaded and the metal spring sheet is deformed, the moving contact on the metal spring sheet is separated from the fixed contact on the second pin, and the circuit can be automatically disconnected in time, so that the timeliness and the sensitivity of power failure are greatly improved, and the danger is avoided.

Preferably, a convex plate is arranged in the lower shell, the convex plate is fixedly connected with one side of the lower shell, a first pin groove is formed at the bottom of the convex plate and the lower shell, one side of the first pin fixedly connected with the metal elastic sheet is positioned in the first pin groove, a second pin groove matched with the other side of the first pin is arranged at the bottom of the lower shell, and the second pin groove is positioned on the side face of the lower shell. One side of the first pin and the metal elastic sheet are fixedly connected, the side of the lower shell is inserted into the first pin groove or pulled out of the first pin groove, and the other side of the first pin is installed in the second pin groove, so that the design is favorable for installation and disassembly of the first pin.

Preferably, a mounting lug is arranged in the lower shell and fixedly connected with the other side of the lower shell, the mounting lug is positioned at the top of the lower shell, the mounting lug is parallel to the bottom of the lower shell, the top of the mounting lug is in contact with the inner side wall of the upper shell, an upper limit block and a pin groove III are arranged at the bottom of the mounting lug, the upper limit block is positioned on one side of the mounting lug, which is close to the connecting block, a lower limit block corresponding to the upper limit block is arranged at the bottom of the lower shell, a metal elastic sheet is positioned between the upper limit block and the lower limit block, the pin groove III is positioned at the central position of the mounting lug, the top side of the pin groove III is far away from the metal elastic sheet, the bottom side of the pin groove III is close to the metal elastic sheet, the bottom side of the pin groove III is communicated with the inside of the lower shell, one side of the pin II where the static contact is positioned is arranged in the pin groove III, a pin groove IV matched with the other side of the pin is arranged on the outer side wall of the lower shell, and one side of the mounting lug, which is far away from the connecting block, is fixedly connected with the convex plate. One side of the second pin where the static contact is located is inserted into the third pin groove through the outer side wall of the lower shell, the other side of the second pin is installed in the fourth pin groove, the design is convenient for installing and dismantling the second pin, and the upper limiting block and the lower limiting block can effectively prevent the metal elastic sheet from being excessively deformed to influence the service life.

Preferably, the pin is located between the second pin groove and one side of the upper shell through one side of the bottom of the lower shell, the other side of the upper shell is provided with a locating plate matched with the fourth pin groove, and the second pin is located between the fourth pin groove and the locating plate through one side of the side wall of the lower shell. One side of the first pin and the metal elastic sheet are fixedly connected and inserted into the first pin groove or pulled out of the first pin groove through the side face of the lower shell, the other side of the first pin is installed in the second pin groove and is limited and fixed through the side face of the upper shell, so that the first pin is convenient to install and detach, one side of the second pin where the static contact is located is inserted into the third pin groove through the outer side wall of the lower shell, the other side of the second pin is installed in the fourth pin groove and is limited and fixed through the locating plate, and the second pin is convenient to install and detach.

Preferably, the metal spring plate is E-shaped, the metal spring plate is formed by integrally forming a substrate and a side piece I, a side piece II and a side piece III which are perpendicular to the substrate, the side piece II is positioned between the side piece I and the side piece III, the moving contact is positioned on the side piece II, the length of the side piece II is respectively smaller than that of the side piece I and that of the side piece III, two welding points are arranged on one edge of the pin I positioned in the pin groove I, the distance between the two welding points is smaller than that between the side piece I and the side piece III, one end of the side piece I is fixedly connected with the substrate, the other end of the side piece I is fixedly connected with the pin I through one welding point, and one end of the side piece III is fixedly connected with the substrate, and the other end of the side piece III is fixedly connected with the pin I through the other welding point. The design makes the first side piece and the third side piece close to one end of the first pin through corresponding welding points, and makes the second side piece drive the moving contact to protrude upwards or to be recessed when the circuit is overloaded or the temperature is too high, so that the moving contact is contacted with or separated from the fixed contact, the working principle is simple, and the response is quick and sensitive.

The invention also provides an installation method of the overload protector, which is characterized by comprising the following steps:

one end of the metal elastic sheet fixedly connected with one side of the first pin is slid into the first pin groove from the side surface of the lower shell until the other side of the first pin is positioned in the second pin groove, and the other end of the second metal elastic sheet is slid into a slot at the bottom of the connecting block;

sliding one side of the second pin with the fixed contact into the third pin slot from the other side surface of the lower shell until the other side of the second pin is positioned in the fourth pin slot, and positioning the fixed contact at a position corresponding to the moving contact;

Step three, the upper shell is arranged on the lower shell, so that one side of the upper shell clamps the first pin, and meanwhile, a positioning plate on the other side of the upper shell is positioned at a position corresponding to the fourth pin groove to clamp the second pin;

Step four, assembling a key-type overload protection switch, namely firstly installing a spring in a locking piece, installing the locking piece on a bottom plate, arranging one end of the spring at the center of the bottom plate, arranging the other end of the spring in the locking piece and contacting with the top of the locking piece, then assembling guide teeth on the bottom of a compression bar on an N-type inclined guide groove of the locking piece, and finally installing a limiting cylinder from top to bottom, so that a connecting cross rod slides into the sliding groove, an L-shaped block on the bottom plate passes through a through hole on an installation block on the bottom of the limiting cylinder, and a flanging on the L-shaped block is installed on an installation plate;

And fifthly, installing the key-type overload protection switch on the upper shell, wherein clamping blocks on two sides of the bottom of the limiting cylinder slide into installation grooves on corresponding positioning blocks along the side surfaces of the upper shell, and simultaneously, the L-shaped rod slides into the U-shaped groove on the top of the connecting block until the clamping buckles on the clamping blocks slide into the clamping grooves to be fixed.

When the circuit is overloaded, the circuit can be automatically disconnected through deformation of the metal elastic sheet, and the circuit can be switched on or off through manual control of the button type overload protection switch, so that the safety performance of the circuit is greatly improved, and meanwhile, the protector is convenient to install and detach.

The invention has the advantages of automatically switching off the circuit, protecting equipment from damage, simultaneously switching on or off the circuit by manually controlling the button type overload protection switch, greatly improving the safety performance of the circuit and being convenient for installation and disassembly.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is a schematic view of the structure of the present invention with the upper housing removed;

FIG. 4 is a cross-sectional view of A-A of FIG. 1;

FIG. 5 is a schematic view of the structure of the invention with the spacing cylinder removed;

FIG. 6 is a cross-sectional view of B-B of FIG. 1;

Fig. 7 is a schematic structural view of the metal spring plate.

In the figure: the protection device comprises a protection shell, a pin I, a pin II, a pin 4, a push-button overload protection switch, a metal spring plate, a connecting block 6, a slot 7, a movable contact 8, a fixed contact 9, a limiting cylinder 10, a bottom plate 11, a locking piece 13, a pressing rod 14, a guide block 15, a sliding groove I, a pin N type inclined guide groove 17, an arc-shaped plate 18, a sliding groove II, a sliding strip 19, a guide tooth 20, a spring 21, a L-shaped block 23, a flanging 24, a mounting block 25, a through hole 26, a mounting plate 27, a clamping block 28, a connecting cross rod 29, a L-shaped rod 30, a U-shaped groove 31, a sliding groove 32, an upper shell 33, a lower shell 34, a positioning block 35, a mounting block 36, a clamping buckle 37, a clamping groove 38, a convex plate 39, a pin I, a pin II, a convex block 41, a convex block 42, an upper limiting block 43, a groove III, a pin 44, a limiting block 45, a pin II, a positioning plate 47, a side plate 49, a side plate 52, a side plate 50 and side plate 52.

Detailed Description

The invention is further described below with reference to the drawings and detailed description.

In the embodiment shown in fig. 1 and 2, an overload protector includes a protection housing 1, a first pin 2 and a second pin 3, where a key-type overload protection switch 4 is disposed at the top of the protection housing 1, as shown in fig. 3, a metal spring 5 is disposed in the protection housing 1, one end of the metal spring 5 is provided with a connecting block 6, the bottom of the connecting block 6 is disposed in the protection housing 1 and is provided with a slot 7 matched with the metal spring 5, one end of the metal spring 5 is connected with the connecting block 6 through the slot 7, the top of the connecting block 6 penetrates the protection housing 1 and is connected with the key-type overload protection switch 4, the other end of the metal spring 5 is fixedly connected with the first pin 2, one end of the first pin 2 is fixedly connected with the metal spring 5, the other end of the first pin 2 penetrates the protection housing 1 and is disposed at the bottom of the protection housing 1, a moving contact 8 is disposed on the metal spring 5, one end of the second pin 3 is disposed in the protection housing 1 and is provided with a fixed contact 9 corresponding to the moving contact 8, and the other end of the second pin 3 penetrates the protection housing 1 and is disposed at the bottom of the protection housing 1.

As shown in fig. 4, the button overload protection switch 4 comprises a limiting cylinder 10, a bottom plate 11, a locking piece 12 and a pressure bar 13, the bottom of the limiting cylinder 10 is detachably connected with the top of the protection shell 1, the bottom plate 11, the locking piece 12 and the pressure bar 13 are all round and are all positioned in the limiting cylinder 10, the inside of the locking piece 12 and the inside of the pressure bar 13 are hollow, the top of the locking piece 12 is positioned in the pressure bar 13, as shown in fig. 5, the bottom of the locking piece 12 is provided with a plurality of guide blocks 14, the plurality of guide blocks 14 are uniformly distributed along the circumferential direction of the locking piece 12 and are positioned outside the locking piece 12, a sliding groove I15 is formed between every two adjacent guide blocks 14, the top of the guide blocks 14 is close to the pressure bar 13 and is provided with an N-shaped inclined guide groove 16, the bottom of the guide blocks 14 is far away from the pressure bar 13, the top of the pressure bar 13 is sealed and penetrates the top of the limiting cylinder 10, the bottom of the pressure bar 13 is provided with a plurality of arc plates 17 corresponding to the guide blocks 14, a second sliding groove 18 corresponding to the first sliding groove 15 is formed between every two adjacent arc plates 17, as shown in fig. 6, a plurality of sliding strips 19 which are respectively matched with the first sliding groove 15 and the second sliding groove 18 are arranged in the limiting cylinder 10, the top of the sliding strips 19 is fixedly connected with the top of the limiting cylinder 10, the bottom of the sliding strips 19 is provided with a guiding inclined plane which is matched with the N-type inclined guide groove 16, one arc plate 17 is fixedly connected with the connecting block 6, as shown in fig. 5, the arc plate 17 is provided with guiding teeth 20 which are matched with the N-type inclined guide groove 16, the pressing rod 13 is meshed with the N-type inclined guide groove 16 through the guiding teeth 20 on the arc plate 17 and is connected with the locking piece 12, as shown in fig. 4, the bottom of the locking piece 12 is rotationally connected with the bottom plate 11, a spring 21 is arranged in the locking piece 12, the top of the locking piece 12 is sealed, one end of the spring 21 is contacted with the top of the locking piece 12, the other end of the spring 21 penetrates through the bottom of the locking piece 12 to be in contact with the top of the bottom plate 11, the bottom of the bottom plate 11 is in contact with the top of the protection shell 1, and the bottom plate 11 is detachably connected with the bottom of the limiting cylinder 10.

As shown in fig. 4 and 5, two L-shaped blocks 22 are arranged on the side surface of the bottom plate 11, the two L-shaped blocks 22 are symmetrically distributed around the bottom plate 11, one end of each L-shaped block 22 is fixedly connected with the side surface of the bottom plate 11, a flange 23 is arranged at the other end of each L-shaped block 22, the flange 23 and the L-shaped blocks 22 form a Z-shaped structure, as shown in fig. 4, mounting blocks 24 are arranged on the front side and the rear side of the outside of the limiting cylinder 10, the mounting blocks 24 are arranged at the bottom of the limiting cylinder 10, through holes 25 matched with the L-shaped blocks 22 are formed in the mounting blocks 24, mounting plates 26 matched with the flange 23 are arranged in the through holes 25, the bottom plate 11 is mounted on the mounting blocks 24 of the limiting cylinder 10 in a matched mode through the flange 23 on the L-shaped blocks 22, as shown in fig. 1,2 and 3, clamping blocks 27 are arranged on the left side and the right side of the outside of the limiting cylinder 10, the clamping blocks 27 are in a cube, the two clamping blocks 27 are symmetrically distributed left and parallel to each other, the clamping blocks 27 are arranged at the bottom of the limiting cylinder 10, and the limiting cylinder 10 is detachably connected with the top of the protecting shell 1 through the clamping blocks 27.

As shown in fig. 5, a connecting cross rod 28 is arranged on the outer side wall of the pressure rod 13, one end of the connecting cross rod 28 is fixedly connected with one of the arc plates 17, an L-shaped rod 29 is arranged at the other end of the connecting cross rod 28, a U-shaped groove 30 is arranged at the top of the connecting block 6, one end of the L-shaped rod 29 is fixedly connected with the connecting cross rod 28, the other end of the L-shaped rod 29 is positioned in the U-shaped groove 30 and is detachably connected with the connecting block 6 through the U-shaped groove 30, a sliding groove 31 matched with the connecting cross rod 28 is arranged on the limiting cylinder 10, and the pressure rod 13 is matched with the limiting cylinder 10 in a vertical sliding manner through the connecting cross rod 28 and the sliding groove 31.

As shown in fig. 1, fig. 2 and fig. 5, the protective housing includes an upper housing 32 and a lower housing 33, the upper housing 32 is detachably connected with the lower housing 33, two positioning blocks 34 are arranged on the upper housing 32, the positioning blocks 34 are in a strip shape, the two positioning blocks 34 are distributed in a bilateral symmetry manner and are parallel to each other, a mounting groove 35 matched with the clamping block 27 is arranged on the positioning blocks 34, as shown in fig. 3, one side of the clamping block 27 is fixedly connected with the limiting cylinder 10, a clamping buckle 36 is arranged on the other side of the clamping block 27, as shown in fig. 5, a clamping groove 37 matched with the clamping buckle 36 is arranged in the mounting groove 35, an L-shaped rod 29 is positioned between one of the positioning blocks 34 and the connecting block 6, and the top of the connecting block 6 penetrates through the upper housing 32 and is detachably connected with the L-shaped rod 29 through the U-shaped groove 30.

As shown in fig. 3 and 4, the shape of the first pin 2 and the shape of the second pin 3 are both L-shaped, one side of the first pin 2 is fixedly connected with the metal elastic sheet 5, the other side of the first pin 2 penetrates through the bottom of the lower housing 33 and is provided with a connecting sheet 52, the second pin 3 is located on the side surface of the metal elastic sheet 5, one end of one side of the second pin 3 is fixedly connected with the fixed contact 9, and the other end of the other side of the second pin penetrates through the side wall of the lower housing 33 and is fixedly connected with the other side.

As shown in fig. 3 and 4, a protruding plate 38 is disposed in the lower housing 33, the protruding plate 38 is fixedly connected with one side of the lower housing 33, a first pin groove 39 is formed at the bottom of the protruding plate 38 and the lower housing 33, one side of the first pin 2 fixedly connected with the metal elastic sheet 5 is located in the first pin groove 39, a second pin groove 40 matched with the other side of the first pin 2 is disposed at the bottom of the lower housing 33, and the second pin groove 40 is located at the side of the lower housing 33. The lower shell 33 is internally provided with a mounting lug 41, the mounting lug 41 is fixedly connected with the other side of the lower shell 33, the mounting lug 41 is positioned at the top of the lower shell 33, the mounting lug 41 is parallel to the bottom of the lower shell 33, the top of the mounting lug 41 is contacted with the inner side wall of the upper shell 32, the bottom of the mounting lug 41 is provided with an upper limit block 42 and a pin groove III 43, the upper limit block 42 is positioned at one side, close to the connecting block 6, of the mounting lug 41, the bottom of the lower shell 33 is provided with a lower limit block 44 corresponding to the upper limit block 42, a metal spring 5 is positioned between the upper limit block 42 and the lower limit block 44, the pin groove III 43 is positioned at the central position of the mounting lug 41, the top side of the pin groove III 43 is far away from the metal spring 5, the bottom side of the pin groove III 43 is close to the metal spring 5, the bottom side of the pin groove III 43 is communicated with the inside of the lower shell 33, one side of the pin II 3 where the fixed contact 9 is positioned is arranged in the pin groove III 43, the fixed contact 9 is positioned at the bottom of the pin groove III, the outer side wall of the lower shell 33 is provided with a pin groove IV 45 matched with the other side of the two 3, and the upper side of the pin 41 is far away from the connecting block 38.

As shown in fig. 4, one side of the pin one 2 penetrating the bottom of the lower housing 33 is located between the pin slot two 40 and one side of the upper housing 32, the other side of the upper housing 32 is provided with a positioning plate 46 matching the pin slot four 45, and one side of the pin two 3 penetrating the side wall of the lower housing 33 is located between the pin slot four 45 and the positioning plate 46.

As shown in fig. 7, the metal spring 5 is in an E shape, the metal spring 5 is formed by integrally forming a substrate 47 and a first side piece 48, a second side piece 49 and a third side piece 50 which are all perpendicular to the substrate 47, the second side piece 49 is located between the first side piece 48 and the third side piece 50, the moving contact 8 is located on the second side piece 49, the length of the second side piece 49 is smaller than that of the first side piece 48 and that of the third side piece 50 respectively, two welding points 51 are arranged on one edge of the first pin 2 located in the first pin groove 39, the distance between the two welding points 51 is smaller than that between the first side piece 48 and the third side piece 50, one end of the first side piece 48 is fixedly connected with the substrate 47, the other end of the first side piece 48 is fixedly connected with the first pin 2 through one welding point 51, one end of the third side piece 50 is fixedly connected with the substrate 47, and the other end of the third side piece 50 is fixedly connected with the first pin 2 through the other welding point 51.

one end of the metal elastic sheet 5 fixedly connected with one side of the pin I2 slides into the pin groove I39 from the side surface of the lower shell 33 until the other side of the pin I2 is positioned in the pin groove II 40, and the other end of the metal elastic sheet 5 II slides into the slot 7 at the bottom of the connecting block 6;

Sliding one side of the second pin 3 where the fixed contact 9 is located into the third pin slot 43 from the other side surface of the lower shell 33 until the other side of the second pin 3 is located in the fourth pin slot 45, and at the moment, the fixed contact 9 is located at a position corresponding to the moving contact 8;

step three, the upper shell 32 is installed on the lower shell 33, so that one side of the upper shell 32 clamps the first pin 2, and meanwhile, the positioning plate 46 on the other side of the upper shell 32 is positioned at a position corresponding to the fourth pin groove 45, and clamps the second pin 3;

Step four, assembling the key-type overload protection switch 4, namely firstly, installing a spring 21 in a locking piece 12, installing the locking piece 12 on a bottom plate 11, wherein one end of the spring 21 is arranged in the center of the bottom plate 11, the other end of the spring 21 is positioned in the locking piece 12 and contacts with the top of the locking piece 12, then, assembling a guide tooth 20 on the bottom of a compression bar 13 on an N-type inclined guide groove 16 of the locking piece 12, and finally, installing a limit cylinder 10 from top to bottom, so that a connecting cross bar 28 slides into a sliding groove 31, and an L-shaped block 22 on the bottom plate 11 passes through a through hole 25 on an installation block 24 at the bottom of the limit cylinder 10, and a turned edge 23 on the L-shaped block 22 is installed on an installation plate 26;

And fifthly, installing the key-type overload protection switch 4 on the upper shell 32, wherein clamping blocks 27 on two sides of the bottom of the limiting cylinder 10 slide into installation grooves 35 on corresponding positioning blocks 34 along the side surfaces of the upper shell 32, and simultaneously, the L-shaped rod 29 slides into the U-shaped groove 30 on the top of the connecting block 6 until clamping buckles 36 on the clamping blocks 27 slide into clamping grooves 37 to be fixed.

The pin I2 penetrates through one side of the bottom of the lower shell 33 to be connected with an external power supply through the connecting sheet 52, the pin II 3 penetrates through one side of the bottom of the lower shell 33 to be electrically connected with equipment through the circuit which is connected with the fixed contact 9 through the moving contact 8 on the metal spring 5, the fixed contact 9 on the pin II 3 and the metal spring 5, when the circuit is connected, the moving contact 8 on the metal spring 5 and the fixed contact 9 on the pin II 3 are in a contact state, the current of the power supply flows into the equipment through the pin I2, the metal spring 5 and the pin II 3 in sequence, a user can control the connection or disconnection of the circuit through the button type overload protection switch 4, the button type overload protection switch 4 drives the metal spring 5 to act through the connecting sheet 6, so that the moving contact 8 on the metal spring 5 is contacted with or separated from the fixed contact 9 on the pin II 3, the control is convenient, the safety performance is greatly improved, and when the circuit is deformed, the moving contact 8 on the metal spring 5 and the fixed contact 9 on the pin II 3 are automatically separated, the circuit can be automatically disconnected in time, the power-off performance and the danger is greatly improved, and the equipment is not damaged.

The bottom plate 11 slides into the through hole 25 through the L-shaped block 22, the flanging 23 on the L-shaped block 22 is arranged on the mounting plate 26 in the through hole 25, the key-type overload protection switch 4 slides into the mounting groove 35 on the positioning block 34 through the clamping block 27 in an integral mode, and finally, when the clamping buckle 36 slides into the clamping groove 37, the mounting of the key-type overload protection switch 4 is completed, so that the position stability of the key-type overload protection switch 4 is improved.

One side of the pin I2 fixedly connected with the metal elastic sheet 5 is inserted into the pin groove I39 through the side face of the lower shell 33, the other side of the pin I2 is installed in the pin groove II 40 and is limited and fixed through the side face of the upper shell 32, so that the pin I2 can be conveniently installed and disassembled, one side of the pin II 3 where the fixed contact 9 is positioned is inserted into the pin groove III 43 through the outer side wall of the lower shell 33, and the other side of the pin II 3 is installed in the pin groove IV 45 and is limited and fixed through the positioning plate 46, so that the pin II 3 can be conveniently installed and disassembled.

Claims

1. An overload protector is characterized by comprising a protective shell (1), Pin one (2) and pin two (3), the top of protection casing (1) is equipped with button overload protection switch (4), be equipped with metal shell fragment (5) in protection casing (1), the one end of metal shell fragment (5) is equipped with connecting block (6), the bottom of connecting block (6) is located protection casing (1) and is equipped with slot (7) with metal shell fragment (5) assorted, the one end of metal shell fragment (5) is connected with connecting block (6) through slot (7), the top of connecting block (6) runs through protection casing (1) and is connected with button overload protection switch (4), the other end and the pin one (2) fixed connection of metal shell fragment (5), the one end and the metal shell fragment (5) fixed connection of pin one (2), the other end of pin one (2) runs through protection casing (1) and is located the bottom of protection casing (1), be equipped with moving contact (8) on the metal shell fragment (5), the one end of two (3) is located protection casing (1) and is equipped with and moves contact (9) corresponding with moving contact (8), the other end of the second pin (3) penetrates through the protection shell (1) and is positioned at the bottom of the protection shell (1), and the key-type overload protection switch (4) comprises a limiting cylinder (10), the bottom of the limiting cylinder (10) is detachably connected with the top of the protection shell (1), and the bottom plate (11), The locking piece (12) and the compression bar (13) are circular in shape and are both positioned in the limiting cylinder (10), the inside of the locking piece (12) and the inside of the compression bar (13) are hollow, the top of the locking piece (12) is positioned in the compression bar (13), a plurality of guide blocks (14) are arranged at the bottom of the locking piece (12), the guide blocks (14) are uniformly distributed along the circumferential direction of the locking piece (12) and are positioned at the outside of the locking piece (12), a sliding groove I (15) is formed between every two adjacent guide blocks (14), the top of the guide block (14) is close to the compression bar (13) and is provided with an N-shaped inclined guide groove (16), the bottom of the guide block (14) is far away from the compression bar (13), the top of the compression bar (13) is sealed and penetrates through the top of the limiting cylinder (10), a plurality of arc plates (17) corresponding to the guide blocks (14) are arranged at the bottom of the compression bar (13), a sliding groove II (18) corresponding to the sliding groove I (15) is formed between every two adjacent arc plates (17), the sliding groove I (15) is formed between the two adjacent arc plates (17), the sliding groove I (19) is connected with the sliding groove I (19) and the sliding groove II (19) respectively, the bottom of the sliding bar (19) is provided with a guiding inclined plane matched with the N-type inclined guide groove (16), one arc-shaped plate (17) is fixedly connected with the connecting block (6), the arc-shaped plate (17) is provided with guiding teeth (20) matched with the N-type inclined guide groove (16), the pressure bar (13) is meshed with the N-type inclined guide groove (16) through the guiding teeth (20) on the arc-shaped plate (17) to be connected with the locking piece (12), the bottom of the locking piece (12) is rotationally connected with the bottom plate (11), the locking piece (12) is internally provided with a spring (21), the top of the locking piece (12) is sealed, one end of the spring (21) is contacted with the top of the locking piece (12), the other end of the spring (21) is penetrated with the top of the bottom plate (11), the bottom of the bottom plate (11) is contacted with the top of the protective shell (1), the bottom plate (11) is detachably connected with the bottom of the limiting cylinder (10), the other end (28) of the connecting bar (28) is arranged on the outer side wall (13), one end (28) of the connecting bar (28) is fixedly connected with the top of the connecting block (12), one end of L-shaped rod (29) is fixedly connected with connecting cross bar (28), the other end of L-shaped rod (29) is located U-shaped groove (30) and can be detached to be connected with connecting block (6) through U-shaped groove (30), be equipped with on spacing section of thick bamboo (10) with connecting cross bar (28) assorted spout (31), depression bar (13) are through connecting cross bar (28) and spout (31) assorted and spacing section of thick bamboo (10) upper and lower sliding connection.

2. The overload protector according to claim 1, wherein the side of the bottom plate (11) is provided with two L-shaped blocks (22), the two L-shaped blocks (22) are symmetrically distributed around the bottom plate (11), one end of each L-shaped block (22) is fixedly connected with the side of the bottom plate (11), the other end of each L-shaped block (22) is provided with a flanging (23), the flanging (23) and the L-shaped blocks (22) form a Z-shaped structure, the front side and the rear side of the limit cylinder (10) are respectively provided with a mounting block (24), the mounting blocks (24) are positioned at the bottom of the limit cylinder (10), through holes (25) matched with the L-shaped blocks (22) are formed in the mounting blocks (24), mounting plates (26) matched with the flanging (23) are arranged in the through holes (23) on the L-shaped blocks (22), the bottom plate (11) are mounted on the mounting blocks (24) of the limit cylinder (10) in a matched mode, the left side and the right side of the limit cylinder (10) are respectively provided with mounting blocks (27) which are symmetrically distributed at the bottom of the limit cylinder (10), and the left side and the right side of the limit cylinder (27) are respectively provided with two limit blocks (27) which are in a shape of the same, the limiting cylinder (10) is detachably connected with the top of the protection shell (1) through a clamping block (27).

3. The overload protector according to claim 1, wherein the protective housing comprises an upper housing (32) and a lower housing (33), the upper housing (32) is detachably connected with the lower housing (33), two positioning blocks (34) are arranged on the upper housing (32), the two positioning blocks (34) are in a strip shape, the two positioning blocks (34) are distributed in a bilateral symmetry mode and are parallel to each other, a mounting groove (35) matched with a clamping block (27) is arranged on the positioning blocks (34), one side of the clamping block (27) is fixedly connected with a limiting cylinder (10), a clamping buckle (36) is arranged on the other side of the clamping block (27), a clamping groove (37) matched with the clamping buckle (36) is formed in the mounting groove (35), an L-shaped rod (29) is positioned between one of the positioning blocks (34) and the connecting block (6), and the top of the connecting block (6) penetrates through the upper housing (32) and is detachably connected with the L-shaped rod (29) through the U-shaped groove (30).

4. An overload protector according to claim 3 wherein the shape of the first pin (2) and the shape of the second pin (3) are both L-shaped, one side of the first pin (2) is fixedly connected with the metal spring (5), the other side of the first pin (2) penetrates through the bottom of the lower housing (33) and is provided with a connecting piece (52), the second pin (3) is located at a side surface of the metal spring (5), one end of one side of the second pin (3) is fixedly connected with the fixed contact (9), and the other end of the second pin penetrates through the side wall of the lower housing (33) and is fixedly connected with the other side.

5. The overload protector according to claim 4, wherein a protruding plate (38) is disposed in the lower housing (33), the protruding plate (38) is fixedly connected with one side of the lower housing (33), a first pin groove (39) is formed at the bottom of the protruding plate (38) and the lower housing (33), one side of the first pin (2) fixedly connected with the metal elastic sheet (5) is located in the first pin groove (39), a second pin groove (40) matched with the other side of the first pin (2) is disposed at the bottom of the lower housing (33), and the second pin groove (40) is located at the side face of the lower housing (33).

6. The overload protector according to claim 5, wherein a mounting protruding block (41) is arranged in the lower shell (33), the mounting protruding block (41) is fixedly connected with the other side of the lower shell (33), the mounting protruding block (41) is positioned at the top of the lower shell (33), the mounting protruding block (41) is parallel to the bottom of the lower shell (33), the top of the mounting protruding block (41) is contacted with the inner side wall of the upper shell (32), an upper limit block (42) and a pin groove III (43) are arranged at the bottom of the mounting protruding block (41), the upper limit block (42) is positioned at one side, close to the connecting block (6), of the mounting protruding block (41), a lower limit block (44) corresponding to the upper limit block (42) is arranged at the bottom of the lower shell (33), the metal spring (5) is positioned between the upper limit block (42) and the lower limit block (44), the pin groove III (43) is positioned at the center of the mounting protruding block (33), the top side of the groove III (43) is far away from the metal spring (5), the pin III (43) is positioned at the bottom of the lower shell (3) and is communicated with the pin III (9), the static contact (9) is located at the bottom side of the pin groove III (43), the outer side wall of the lower shell (33) is provided with a pin groove IV (45) matched with the other side of the pin II (3), and one side, far away from the connecting block (6), of the mounting lug (41) is fixedly connected with the convex plate (38).

7. An overload protector according to claim 6 wherein one side of the first pin (2) extending through the bottom of the lower housing (33) is located between the second pin slot (40) and one side of the upper housing (32), the other side of the upper housing (32) is provided with a locating plate (46) matching the fourth pin slot (45), and one side of the second pin (3) extending through the side wall of the lower housing (33) is located between the fourth pin slot (45) and the locating plate (46).

8. The overload protector according to claim 5, wherein the metal spring plate (5) is E-shaped, the metal spring plate (5) is formed by integrally forming a substrate (47) and a first side piece (48), a second side piece (49) and a third side piece (50) which are all perpendicular to the substrate (47), the second side piece (49) is located between the first side piece (48) and the third side piece (50), the moving contact (8) is located on the second side piece (49), the length of the second side piece (49) is respectively smaller than the length of the first side piece (48) and the length of the third side piece (50), two welding points (51) are arranged on one edge of the first pin (2) located in the first pin groove (39), the distance between the two welding points (51) is smaller than the distance between the first side piece (48) and the third side piece (50), one end of the first side piece (48) is fixedly connected with the substrate (47), the other end of the first side piece (48) is fixedly connected with the third pin (50) through one pin (47), and the other end of the first pin (2) is fixedly connected with the third pin (50) through one welding point (51).

9. The mounting method of an overload protector according to any one of claims 6 to 7, characterized by comprising the steps of:

One end of the metal elastic sheet (5) fixedly connected with one side of the first pin (2) slides into the first pin groove (39) from the side surface of the lower shell (33) until the other side of the first pin (2) is positioned in the second pin groove (40), and the other end of the second metal elastic sheet (5) slides into a slot (7) at the bottom of the connecting block (6);

Sliding one side of the second pin (3) where the fixed contact (9) is located into the third pin groove (43) from the other side surface of the lower shell (33) until the other side of the second pin (3) is located in the fourth pin groove (45), and at the moment, the fixed contact (9) is located at a position corresponding to the moving contact (8);

Step three, the upper shell (32) is arranged on the lower shell (33), so that one side of the upper shell (32) clamps the first pin (2), and meanwhile, a positioning plate (46) on the other side of the upper shell (32) is positioned at a position corresponding to the fourth pin groove (45) to clamp the second pin (3);

Step four, assembling the button type overload protection switch (4), namely firstly, installing a spring (21) in a locking piece (12), installing the locking piece (12) on a bottom plate (11), arranging one end of the spring (21) at the center of the bottom plate (11), arranging the other end of the spring (21) in the locking piece (12) and contacting with the top of the locking piece (12), then assembling guide teeth (20) on the bottom of a pressing rod (13) on an N-type inclined guide groove (16) of the locking piece (12), finally installing a limiting cylinder (10) from top to bottom, enabling a connecting cross rod (28) to slide into a sliding groove (31), enabling an L-shaped block (22) on the bottom plate (11) to penetrate through a through hole (25) on an installing block (24) on the bottom of the limiting cylinder (10), and installing a flanging (23) on the L-shaped block (22) on an installing plate (26).

And fifthly, installing the button type overload protection switch (4) on the upper shell (32), wherein clamping blocks (27) on two sides of the bottom of the limiting cylinder (10) slide into installation grooves (35) on corresponding positioning blocks (34) along the side surfaces of the upper shell (32), and simultaneously, the L-shaped rod (29) slides into the U-shaped groove (30) on the top of the connecting block (6) until a clamping buckle (36) on the clamping blocks (27) slides into the clamping groove (37) to be fixed.