CN112687498A

CN112687498A - Novel overload protection switch

Info

Publication number: CN112687498A
Application number: CN202011464617.0A
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: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-20
Also published as: WO2022126371A1

Abstract

The invention discloses a novel overload protection switch, which comprises a protection shell and a switch body, the protection device comprises a first pin and a second pin, the switch body is installed at the top of the protection shell, one end of the switch body is located outside the protection shell, the other end of the switch body is located inside the protection shell, the bottom of the protection shell is provided with a metal sheet, the first pin and the second pin are installed inside the protection shell, one end of the pin is located between the switch body and the metal sheet, one end of the first pin and one end of the switch body are located inside the protection shell and are elastically connected, one end of the pin is provided with a metal elastic sheet, one end of the metal elastic sheet is fixedly connected with the second pin, the other end of the metal elastic sheet is provided with a moving contact, one end of the metal sheet is provided with a first static contact corresponding to the first pin, the. The invention has the beneficial effects that: the automatic circuit breaking is realized.

Description

Novel overload protection switch

Technical Field

The invention relates to the technical field related to protection switches, in particular to a novel overload protection switch.

Background

Along with the continuous development of society, the quality of life of people constantly improves, and various consumer appears in the life, along with domestic appliance and circuit constantly age, perhaps electrical apparatus misuse, all take place the incident such as circuit overload or short circuit easily, if add between the socket of electrical apparatus and house circuit and establish novel overload protection switch with effectual reduction emergence incident's probability.

Especially, when the common electrical appliances in our family life are overloaded and the current or temperature is too high due to abnormal conditions occurring in the use process of the electrical appliances, the existing plug device cannot automatically disconnect the circuit because of no automatic power-off function, so that the damage of the electrical appliances and even the fire disaster are easily caused, and extremely serious consequences are brought.

Disclosure of Invention

The invention provides a novel overload protection switch capable of automatically disconnecting a circuit, aiming at overcoming the defect that the circuit cannot be automatically disconnected under the abnormal condition of an electric appliance in the use process in the prior art.

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

a novel overload protection switch comprises a protection shell, a switch body, a first pin and a second pin, wherein the switch body is installed at the top of the protection shell, one end of the switch body is located outside the protection shell, the other end of the switch body is located inside the protection shell, a metal sheet is arranged at the bottom of the protection shell, the metal sheet, the first pin and the second pin are all installed inside the protection shell, one end of the first pin is located between the switch body and the metal sheet, one end of the first pin is elastically connected with one end of the switch body located inside the protection shell, one end of the second pin is provided with a metal elastic sheet, one end of the metal elastic sheet is fixedly connected with the second pin, the other end of the metal elastic sheet is provided with a moving contact, one end of the metal sheet is provided with a first static contact corresponding to the first pin, and the other end of the metal sheet is provided with a, the switch is characterized in that an ejection device is arranged in the protective shell and located between the metal elastic sheet and the metal sheet, the bottom end of the ejection device is elastically connected with the bottom of the protective shell, and the top end of the ejection device penetrates through the top of the protective shell and is connected with the switch body.

The switch body is arranged at the top of the protection shell, one end of the switch body is positioned outside the protection shell, the other end of the switch body is positioned in the protection shell, the bottom of the protection shell is provided with a metal sheet, the metal sheet, a first pin and a second pin are all arranged in the protection shell, one end of the first pin is positioned between the switch body and the metal sheet, one end of the first pin is elastically connected with one end of the switch body in the protection shell, one end of the second pin is provided with a metal elastic sheet, one end of the metal elastic sheet is fixedly connected with the second pin, the other end of the metal elastic sheet is provided with a moving contact, one end of the metal sheet is provided with a first static contact corresponding to the first pin, the other end of the metal sheet is provided with a second static contact which is contacted with the moving contact, an ejection device is arranged in the protection shell and is, the bottom end of the ejection device is elastically connected with the bottom of the protection shell, and the top end of the ejection device penetrates through the top of the protection shell and is connected with the switch body. The first pin is electrically connected with the equipment, and the second pin is electrically connected with an external power supply; an operator presses down the switch body, the circuit is connected, at the moment, a first static contact on the metal sheet and a first pin are in a contact state, and the current of an external power supply sequentially passes through a second pin, the metal elastic sheet, the metal sheet and a pin and flows into equipment; a moving contact on the metal elastic sheet is contacted with a static contact two phase on the metal sheet, so that the pin two phase is conveniently conducted with the pin one phase through the metal elastic sheet and the metal sheet in sequence; an operator can control the on or off of the circuit through the switch body, the switch body drives one end of the first pin to act, so that one end of the first pin is in contact with or separated from the first static contact on the metal sheet, and simultaneously drives the ejection device to act, so that a movable contact on the metal elastic sheet is in contact with or separated from the second static contact on the metal sheet, the metal elastic sheet and the first pin can be in contact with or separated from the metal sheet at the same time, the protection switch can be connected with or disconnected from the circuit by an external power supply, and meanwhile, the protection switch can be connected with or disconnected from the circuit by equipment, the control is convenient, and the safety performance is improved; in addition, if the circuit is overloaded, the metal elastic sheet deforms, so that the moving contact on the metal elastic sheet is automatically separated from the second static contact on the metal sheet, the ejection device moves upwards under the elastic reset action, the moving contact and the second static contact are isolated, the switch body is driven to move upwards at the same time, the switch body is ejected, the first pin is separated from the first static contact, the protection switch can simultaneously and respectively disconnect current from an external power supply and equipment, the equipment and the external power supply are protected from being damaged, and the purpose of automatically disconnecting the circuit is achieved.

Preferably, the other end of the first pin and the other end of the second pin both penetrate through the protection shell and are located outside the protection shell, the metal elastic sheet comprises an arc-shaped sheet and a rectangular sheet, one side of the arc-shaped sheet is close to the ejection device, the other side, corresponding to the arc-shaped sheet, is far away from the ejection device, the arc-shaped sheet protrudes towards the side far away from the ejection device to form an arc-shaped structure, one end of the arc-shaped sheet is fixedly connected with the long side of the rectangular sheet and is integrated with the rectangular sheet, one end of the arc-shaped sheet is fixedly connected with the second pin through the rectangular sheet, the other end of the arc-shaped sheet protrudes towards the side close to the ejection device to form a groove, the shortest distance from one end of the arc-shaped sheet fixedly connected with the second pin through the rectangular sheet to the ejection device is larger than the shortest distance from the other end of the arc-, the long edge and the groove of the rectangular sheet are both located on the wide edge of the arc sheet, the width of one end, fixedly connected with the pins through the rectangular sheet, of the arc sheet is smaller than the width of the other end of the arc sheet and the length of the rectangular sheet respectively, the long edge of the arc sheet comprises a straight edge and an arc edge, a transition arc edge is arranged at one end of the straight edge, the straight edge is in uniform transition between the wide edge of the transition arc edge and the wide edge of the rectangular sheet, and the other end of the straight edge is in uniform transition between the other end of the arc edge and the. The moving contact is fixedly arranged at the bottom of the groove, so that the moving contact can be in two-phase contact with the static contact, and the bottom of the groove is a plane, so that the moving contact is fixedly arranged; under the normal state, the moving contact is close to and contacts with the second static contact through the design of the arc-shaped piece, when a circuit is overloaded or the temperature is too high, the protruding direction of the arc-shaped structure on the arc-shaped piece is changed, the arc-shaped structure protrudes to one side close to the ejection device, so that the moving contact is separated from the second static contact, meanwhile, the ejection device moves upwards under the elastic reset effect, the moving contact and the second static contact are isolated, and meanwhile, the switch body is driven to move upwards, so that the first pin is separated from the first static contact.

Preferably, a switch cap is arranged at one end, located outside the protective shell, of the switch body, a turned-over edge is arranged at the edge of the opening end of the switch cap, the top end of the ejection device penetrates through the top of the protective shell and is in contact with the turned-over edge, the switch body is fixedly connected with the center of the bottom of the switch cap, a first spring is arranged at one end, located inside the protective shell, of the switch body, and the switch body is elastically connected with the first pin through the first spring. The switch cap is convenient for improving the comfort when an operator presses the switch body; the first spring is beneficial to realizing the normal work of the switch body.

Preferably, the ejection device comprises a spacer and a second spring, the bottom of the protection shell is provided with a limiting seat, the bottom of the spacer is provided with a U-shaped groove matched with the limiting seat, one side of the spacer is provided with an L-shaped notch, the L-shaped notch is positioned at the bottom of the spacer and positioned on the side surface of the U-shaped groove, one side of the L-shaped notch is perpendicular to the side wall of the U-shaped groove, the other side of the L-shaped notch is parallel to the side wall of the U-shaped groove, a limiting plate is arranged on one side of the L-shaped notch, which is perpendicular to the side wall of the U-shaped groove, the limiting plate is positioned at one end of one side of the L-shaped notch, the other end of one side of the L-shaped notch is connected with the other side of the L-shaped notch, one end of the second spring is sleeved on the limiting plate, the other end of the second spring is, the spacer is equipped with and dodges the top that the one side top of groove one runs through the protection casing and contacts with the turn-ups, the spacer is equipped with one side top that L type breach runs through the top of protection casing and is located outside the protective housing. The isolating sheet is matched with the limiting seat through the U-shaped groove to move up and down under the action of the second spring or the switch cap, and the design is reasonable; the limiting plate has a positioning effect on the second spring; when a moving contact on the metal elastic sheet is separated from a second static contact on the metal sheet, the isolating sheet moves upwards under the reset action of the second spring, and the switch body is driven to move upwards through the switch cap, so that the first pin is separated from the first static contact on the metal sheet; the first avoiding groove is convenient for the moving contact on the metal elastic sheet to be in two-phase contact with the static contact on the metal sheet through the first avoiding groove when the isolating sheet moves downwards under the driving of the switch cap, so that the circuit is conducted.

Preferably, the protective shell comprises an upper cover, a base and a side cover, the base is positioned at the bottom of the upper cover, the side cover is positioned on the side surface of the upper cover, the top of the upper cover is fixedly connected with an installation barrel matched with the switch body, the outer side wall of the installation barrel is provided with two installation blocks, one installation block is positioned on one side of the installation barrel, the other installation block is positioned on the other side corresponding to the installation barrel, the top end of the isolation sheet is provided with a avoidance groove II matched with the installation block, the avoidance groove II is positioned between the L-shaped notch and the avoidance groove I, the bottom of the avoidance groove II is positioned in the protective shell, the installation block is contacted with the top of the upper cover, one side of the bottom of the upper cover is provided with an avoidance notch matched with the pin I, the other side corresponding to the upper cover is clamped with the side cover, the other two sides of the upper cover are provided with clamping grooves, the base is, the base is detachably mounted on the upper cover through the matching of the buckle and the clamping groove. The mounting block is convenient for mounting and positioning the protection switch; the upper cover is clamped with the side cover and is connected with the base through a buckle, so that the protection switch is convenient to install and maintain.

As preferred, the center of base is equipped with the mounting panel, pin one is located one side of mounting panel, spacing seat, pin two and metal shrapnel all are located the corresponding opposite side of mounting panel, the one end demountable installation of pin one just is equipped with the flexure strip on the base, the one end of flexure strip is located between metal sheet and the switch body, and through spring one and switch body elastic connection, the other end of flexure strip is equipped with the transition arc surface, the flexure strip just forms integratively through transition arc surface and a pin fixed connection, the flexure strip constitutes an acute angle with pin one, the other end of pin one runs through to dodge the breach and is located the protective housing externally. The elastic sheet is designed to move downwards when the switch body is pressed downwards, and is contacted with the first static contact on the metal sheet to conduct a circuit, and meanwhile, when the switch body moves upwards, the metal elastic sheet resets under the elastic action of the elastic sheet and is separated from the first static contact on the metal sheet to disconnect the circuit, so that the design is reasonable; one end of the pin, which is positioned outside the protective shell, is convenient for being electrically connected with equipment.

Preferably, the metal sheet is in an L shape, the metal sheet is located on a side surface of the first pin, one side of the metal sheet is detachably connected with the base and is located on the same side of the mounting plate as the first pin, the first stationary contact is located on one side of the metal sheet detachably connected with the base, the first stationary contact is located at one end of one side of the metal sheet and corresponds to the position of the elastic sheet, the other end of one side of the metal sheet penetrates through the mounting plate to be fixedly connected with the other side of the metal sheet, and the second stationary contact is located on the other side of the metal sheet. The design of the metal sheet enables the two ends of the metal sheet to be simultaneously and respectively communicated with or disconnected with the metal elastic sheet or the elastic sheet, so that the protection switch can simultaneously and respectively disconnect current with an external power supply and equipment, and the equipment and the external power supply are protected from being damaged.

As preferred, the shape of pin two is the L type, one side and the base of pin two can be dismantled and be connected, the another side of pin two passes through rectangle piece and arc piece fixed connection, pin two can be dismantled the one end of being connected and run through the side cap with the base and be located outside the protective housing, and its other end and another side fixed connection just form an organic whole, be equipped with the spacing post of L type on pin two, one side and the side fixed connection of pin two of the spacing post of L type, the another side of the spacing post of L type is located between mounting panel and the rectangle piece, the other pot head of spring two is located on one side that the spacing post of L type is located between mounting panel and the rectangle piece and is contacted with the bottom of protective housing. The limiting plate has a positioning effect on the top end of the second spring, and the L-shaped limiting column has a positioning effect on the bottom end of the second spring, so that the position stability of the second spring is improved; one end of the second pin is located outside the protective shell and is convenient to be electrically connected with an external power supply.

Preferably, the limiting seat comprises a first limiting lug and a second limiting lug matched with the U-shaped groove, one side of the first limiting lug is fixedly connected with the mounting plate, the other side corresponding to the first limiting lug is fixedly connected with the second limiting lug, one side of the spacer is close to the metal elastic sheet, the other side corresponding to the spacer is far away from the metal elastic sheet, the first limiting lug is located on one side, far away from the metal elastic sheet, of the spacer, and the height of the first limiting lug is larger than that of the second limiting lug. The first limiting lug and the metal elastic sheet can limit the two sides of the spacing piece, and the spacing piece is matched with the first limiting lug through the U-shaped groove to move up and down.

Preferably, one end of the moving contact is fixedly connected with the bottom of the groove, a first guide inclined plane is arranged on the edge of the other end of the moving contact and is in contact with a second fixed contact, one end of the second fixed contact is fixedly connected with the metal sheet, a second guide inclined plane is arranged on the other end of the second fixed contact and is in contact with the moving contact, and a first chamfer edge corresponding to the first guide inclined plane and a second chamfer edge corresponding to the second guide inclined plane are arranged on the edges of the two sides of the first avoidance groove. The design plays a certain guide role when the moving contact and the static contact are isolated by the isolating sheet, thereby being beneficial to realizing the automatic circuit breaking.

The invention has the beneficial effects that: an operator can switch on or off the circuit through the switch body, and meanwhile, when the circuit is overloaded, the protection switch can automatically switch off the circuit through the deformation of the metal elastic sheet in the protection switch, so that the control is convenient; the protection switch can be simultaneously connected with or disconnected with an external power supply and equipment, so that the safety performance is improved; the working principle is simple, and the response is quick and sensitive; the design is reasonable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a left side view of FIG. 4;

FIG. 6 is a top view of FIG. 4;

fig. 7 is a schematic structural view of fig. 6 with the metal dome removed;

FIG. 8 is a schematic structural diagram of a metal dome;

FIG. 9 is a schematic structural view of a metal sheet;

fig. 10 is a schematic view of the base of fig. 5 with the base removed.

In the figure: 1. the protection device comprises a protection shell, 2, a switch body, 3, a first pin, 4, a second pin, 5, a metal sheet, 6, a metal elastic sheet, 7, a moving contact, 8, a first static contact, 9, a second static contact, 10, an ejection device, 11, an arc sheet, 12, a rectangular sheet, 13, a groove, 14, a straight edge, 15, an arc edge, 16, a transition arc edge, 17, a switch cap, 18, a flanging, 19, a first spring, 20, a separation sheet, 21, a second spring, 22, a limiting seat, 23, a U-shaped groove, 24, an L-shaped notch, 25, a limiting plate, 26, an avoiding groove I, 27, an upper cover, 28, a base, 29, a side cover, 30, an installation cylinder, 31, an installation block, 32, an avoiding groove II, 33, an avoiding notch, 34, a clamping groove, 35, a buckle, 36, an installation plate and 37, an elastic sheet, 38. the transition arc surface is 39, the L-shaped limiting column is 40, the limiting projection is I, 41, the limiting projection is II, 42, the guide inclined surface is I, 43, the guide inclined surface is II, 44, the chamfering edge is I, 45 and the chamfering edge is II.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In the embodiment shown in fig. 1, a novel overload protection switch comprises a protection housing 1, a switch body 2, a first pin 3 and a second pin 4, wherein the switch body 2 is installed at the top of the protection housing 1, one end of the switch body 2 is located outside the protection housing 1, the other end of the switch body 2 is located inside the protection housing 1, as shown in fig. 2, a metal sheet 5 is arranged at the bottom of the protection housing 1, the metal sheet 5, the first pin 3 and the second pin 4 are all installed inside the protection housing 1, as shown in fig. 3, one end of the first pin 3 is located between the switch body 2 and the metal sheet 5, one end of the first pin 3 is elastically connected with one end of the switch body 2 located inside the protection housing 1, as shown in fig. 4, 5 and 6, a metal spring 6 is fixed at one end of the second pin 4, one end of the metal spring 6 is fixedly connected with the second pin 4, and a movable contact 7 is arranged at the, as shown in fig. 2 and 3, one end of the metal sheet 5 is provided with a first stationary contact 8 corresponding to the first pin 3, as shown in fig. 4, 5 and 7, the other end of the metal sheet 5 is provided with a second stationary contact 9 contacting with the movable contact 7, as shown in fig. 2 and 4, an ejection device 10 is arranged in the protection housing 1, the ejection device 10 is located between the metal elastic sheet 6 and the metal sheet 5, as shown in fig. 1 and 2, the bottom end of the ejection device 10 is elastically connected with the bottom of the protection housing 1, and the top end of the ejection device 10 penetrates through the top of the protection housing 1 and is connected with the switch body 2.

As shown in fig. 1, the other end of the first pin 3 and the other end of the second pin 4 both penetrate through the protection housing 1 and are located outside the protection housing 1, as shown in fig. 4 and 8, the metal spring 6 includes an arc piece 11 and a rectangular piece 12, one side of the arc piece 11 is close to the ejection device 10, the other side corresponding to the arc piece 11 is far from the ejection device 10, the arc piece 11 protrudes to one side far from the ejection device 10 to form an arc structure, one end of the arc piece 11 is fixedly connected with the long side of the rectangular piece 12 and is integrated with the rectangular piece 12, one end of the arc piece 11 is fixedly connected with the second pin 4 through the rectangular piece 12, the other end of the arc piece 11 protrudes to one side close to the ejection device 10 to form a groove 13, the shortest distance from one end of the arc piece 11 fixedly connected with the second pin 4 through the rectangular piece 12 to the ejection device 10 is greater than the shortest distance from the other, the bottom shape of recess 13 is the plane, moving contact 7 fixed mounting is on the plane, the long limit of rectangular plate 12 and recess 13 all are located the broadside of arc piece 11, the width that the width of arc piece 11 passes through rectangular plate 12 and pin two 4 fixed connection's one end is less than the width of its other end and the length of rectangular plate 12 respectively, the long limit of arc piece 11 includes straight flange 14 and arc limit 15, the one end of straight flange 14 is equipped with transition arc limit 16, even transition between the broadside of straight flange 14 through transition arc limit 16 and rectangular plate 12, even transition between the other end of straight flange 14 and arc limit 15.

As shown in fig. 1 and fig. 2, a switch cap 17 is arranged at one end of the switch body 2 located outside the protection housing 1, a flange 18 is arranged at the edge of an opening end of the switch cap 17, the top end of the ejector 10 penetrates through the top of the protection housing 1 to be in contact with the flange 18, the switch body 2 is fixedly connected with the center of the bottom of the switch cap 17, a first spring 19 is arranged at one end of the switch body 2 located inside the protection housing 1, and as shown in fig. 2 and fig. 3, the switch body 2 is elastically connected with the first pin 3 through the first spring 19.

As shown in fig. 4 and 7, the ejection device 10 includes a spacer 20 and a second spring 21, the bottom of the protection housing 1 is provided with a limiting seat 22, the bottom of the spacer 20 is provided with a U-shaped groove 23 matching with the limiting seat 22, one side of the spacer 20 is provided with an L-shaped notch 24, the L-shaped notch 24 is located at the bottom of the spacer 20 and is located at the side of the U-shaped groove 23, one side of the L-shaped notch 24 is perpendicular to the side wall of the U-shaped groove 23, the other side of the L-shaped notch 24 is parallel to the side wall of the U-shaped groove 23, one side of the L-shaped notch 24 perpendicular to the side wall of the U-shaped groove 23 is provided with a limiting plate 25, the limiting plate 25 is located at one end of one side of the L-shaped notch 24, the other end of one side of the L-shaped notch 24 is connected with the other side of the L-shaped notch, one end of the second spring 21 is sleeved on the limiting plate 25, the other, as shown in fig. 1, 2 and 7, the top end of the side of the spacer 20 provided with the avoidance groove 26 penetrates the top of the protection casing 1 to contact with the flange 18, and the top end of the side of the spacer 20 provided with the L-shaped notch 24 penetrates the top of the protection casing 1 to be located outside the protection casing 1.

As shown in fig. 2, the protective housing 1 includes an upper cover 27, a base 28 and a side cover 29, the base 28 is located at the bottom of the upper cover 27, the side cover 29 is located at the side of the upper cover 27, the top of the upper cover 27 is fixedly connected with a mounting cylinder 30 matched with the switch body 2, two mounting blocks 31 are arranged on the outer side wall of the mounting cylinder 30, one mounting block 31 is located at one side of the mounting cylinder 30, the other mounting block 31 is located at the other side corresponding to the mounting cylinder 30, as shown in fig. 1 and 7, the top end of the isolation sheet 20 is provided with a second avoidance groove 32 matched with the mounting block 31, the second avoidance groove 32 is located between the L-shaped notch 24 and the first avoidance groove 26, the bottom of the second avoidance groove 32 is located in the protective housing 1, the mounting block 31 is in contact with the top of the upper cover 27, as shown in fig. 2, one side of the bottom of the upper cover 27 is provided with an avoidance notch 33 matched with the first, the rest two sides of the upper cover 27 are provided with clamping grooves 34, the base 28 is provided with a buckle 35 matched with the clamping grooves 34, and the base 28 is detachably mounted on the upper cover 27 through the buckle 35 and the clamping grooves 34.

As shown in fig. 2 and 4, a mounting plate 36 is disposed at the center of the base 28, the first pin 3 is located on one side of the mounting plate 36, the limiting seat 22, the second pin 4 and the metal elastic sheet 6 are located on the other side corresponding to the mounting plate 36, as shown in fig. 2, 3 and 4, one end of the first pin 3 is detachably mounted on the base 28 and is provided with an elastic sheet 37, one end of the elastic sheet 37 is located between the metal sheet 5 and the switch body 2 and is elastically connected with the switch body 2 through a first spring 19, the other end of the elastic sheet 37 is provided with a transition arc surface 38, the elastic sheet 37 is fixedly connected with the first pin 3 through the transition arc surface 38 and forms a whole, the elastic sheet 37 and the first pin 3 form an acute angle, and the other end of the first pin 3 penetrates through the avoidance notch 33 and is.

As shown in fig. 2, 4, 9 and 10, the metal sheet 5 is L-shaped, the metal sheet 5 is located on a side surface of the first pin 3, one side of the metal sheet 5 is detachably connected to the base 28 and is located on the same side of the mounting plate 36 as the first pin 3, the first stationary contact 8 is located on one side of the metal sheet 5 detachably connected to the base 28, the first stationary contact 8 is located on one end of one side of the metal sheet 5 and corresponds to the position of the elastic sheet 37, the other end of one side of the metal sheet 5 penetrates through the mounting plate 36 and is fixedly connected to the other side of the metal sheet 5, and the second stationary contact 9 is located on the other side of the metal sheet 5.

As shown in fig. 2, 4, 6, 7 and 10, the second pin 4 is L-shaped, one side of the second pin 4 is detachably connected to the base 28, the other side of the second pin 4 is fixedly connected to the arc piece 11 through the rectangular piece 12, one end of the detachably connected side of the second pin 4 to the base 28 penetrates through the side cover 29 and is located outside the protection housing 1, the other end of the detachably connected side of the second pin 4 is fixedly connected to the other side of the side cover and is formed into a whole, the second pin 4 is provided with an L-shaped limiting column 39, one side of the L-shaped limiting column 39 is fixedly connected to the side of the second pin 4, the other side of the L-shaped limiting column 39 is located between the mounting plate 36 and the rectangular piece 12, and the other end of the second spring 21 is sleeved on one side of the L-shaped limiting column 39 located between the mounting plate.

As shown in fig. 4 and 7, the limiting seat 22 includes a first limiting projection 40 and a second limiting projection 41 matched with the U-shaped groove 23, one side of the first limiting projection 40 is fixedly connected to the mounting plate 36, the other side of the first limiting projection 40 corresponding to the second limiting projection 41 is fixedly connected to the metal dome 6, one side of the spacer 20 is close to the metal dome 6, the other side of the spacer 20 corresponding to the metal dome 6 is far away from the metal dome 6, the first limiting projection 40 is located on one side of the spacer 20 far away from the metal dome 6, and the height of the first limiting projection 40 is greater than the height of the second limiting projection 41.

As shown in fig. 10, one end of the movable contact 7 is fixedly connected to the bottom of the groove 13, a first guiding inclined plane 42 is disposed at an edge of the other end of the movable contact 7 and contacts with a second stationary contact 9, one end of the second stationary contact 9 is fixedly connected to the metal sheet 5, a second guiding inclined plane 43 is disposed at the other end of the second stationary contact 9 and contacts with the movable contact 7, and a first chamfered edge 44 corresponding to the first guiding inclined plane 42 and a second chamfered edge 45 corresponding to the second guiding inclined plane 43 are disposed at edges of two sides of the avoidance groove 26.

The first pin 3 is mainly used for being electrically connected with equipment, and the second pin 4 is mainly used for being electrically connected with an external power supply; an operator presses the switch cap 17, the switch body 2 drives the elastic sheet 37 on the pin I3 to move downwards, the elastic sheet 37 is in contact with the first static contact 8 on the metal sheet 5, meanwhile, the switch cap 17 acts on the top end of the isolating sheet 20 through the flanging 18 to enable the isolating sheet 20 to move downwards, the movable contact 7 on the metal elastic sheet 6 is in contact with the second static contact 9 on the metal sheet 5 through the first avoiding groove 26, and therefore the protection switch is respectively conducted with the equipment and an external power supply circuit.

On the contrary, when the circuit needs to be disconnected, the operator presses the switch cap 17 again, the switch body 2 drives the elastic sheet 37 to pop up, the elastic sheet 37 is separated from the first static contact 8 on the metal sheet 5, meanwhile, the isolating sheet 20 moves upwards under the reset action of the second spring 21, and separates the movable contact 7 on the metal elastic sheet 6 from the second static contact 9 on the metal sheet 5, so that the protection switch can be disconnected from the equipment and the external power circuit simultaneously.

When the circuit is overloaded, the metal elastic sheet 6 deforms, so that the moving contact 7 on the metal elastic sheet 6 is automatically separated from the second static contact 9 on the metal sheet 5, meanwhile, the isolating sheet 20 moves upwards under the reset action of the second spring 21 and isolates the moving contact 7 from the second static contact 9, the top end of the isolating sheet 20 acts on the switch cap 17 through the flanging 18, the switch cap 17 drives the switch body 2 to move upwards simultaneously, the elastic sheet 37 on the first pin 3 is separated from the first static contact 8, the protection switch can simultaneously disconnect current with an external power supply and equipment respectively, the protection equipment and the external power supply are protected, and the purpose of automatically disconnecting the circuit is achieved.

Claims

1. A novel overload protection switch is characterized by comprising a protection shell (1), a switch body (2), a first pin (3) and a second pin (4), wherein the switch body (2) is installed at the top of the protection shell (1), one end of the switch body (2) is located outside the protection shell (1), the other end of the switch body (2) is located inside the protection shell (1), a metal sheet (5) is arranged at the bottom of the protection shell (1), the metal sheet (5), the first pin (3) and the second pin (4) are all installed inside the protection shell (1), one end of the first pin (3) is located between the switch body (2) and the metal sheet (5), one end of the first pin (3) is elastically connected with one end, located inside the protection shell (1), of the switch body (2), and the other end of the first pin (3) penetrates through the protection shell (1) and is located outside the protection shell (1), one end of the second pin (4) is provided with a metal elastic sheet (6), one end of the metal elastic sheet (6) is fixedly connected with the second pin (4), the other end of the metal elastic sheet (6) is provided with a moving contact (7), the other end of the pin II (4) penetrates through the protective shell (1) and is positioned outside the protective shell (1), one end of the metal sheet (5) is provided with a first static contact (8) corresponding to the first pin (3), the other end of the metal sheet (5) is provided with a static contact II (9) which is contacted with the moving contact (7), an ejection device (10) is arranged in the protective shell (1), the ejection device (10) is positioned between the metal elastic sheet (6) and the metal sheet (5), the bottom end of the ejection device (10) is elastically connected with the bottom of the protective shell (1), the top end of the ejection device (10) penetrates through the top of the protection shell (1) and is connected with the switch body (2).

2. The novel overload protection switch as recited in claim 1, wherein the other end of the first pin (3) and the other end of the second pin (4) both penetrate through the protection housing (1) and are located outside the protection housing (1), the metal dome (6) comprises an arc-shaped sheet (11) and a rectangular sheet (12), one side of the arc-shaped sheet (11) is close to the ejection device (10), the other side of the arc-shaped sheet (11) corresponding to the arc-shaped sheet is far away from the ejection device (10), the arc-shaped sheet (11) protrudes to the side far away from the ejection device (10) to form an arc-shaped structure, one end of the arc-shaped sheet (11) is fixedly connected with the long side of the rectangular sheet (12) and is integrated with the rectangular sheet (12), one end of the arc-shaped sheet (11) is fixedly connected with the second pin (4) through the rectangular sheet (12), and the other end of the arc-shaped sheet (11) protrudes to the side close to the ejection device (10) to form, the shortest distance from one end of the arc-shaped piece (11) fixedly connected with the second pin (4) through the rectangular piece (12) to the top-out device (10) is greater than the shortest distance from the other end of the arc-shaped piece (11) to the top-out device (10), the bottom of the groove (13) is in a plane shape, the movable contact (7) is fixedly installed on the plane, the long edge of the rectangular piece (12) and the groove (13) are both positioned on the wide edge of the arc-shaped piece (11), the width of one end of the arc-shaped piece (11) fixedly connected with the second pin (4) through the rectangular piece (12) is respectively smaller than the width of the other end of the arc-shaped piece and the length of the rectangular piece (12), the long edge of the arc-shaped piece (11) comprises a straight edge (14) and an arc-shaped edge (15), one end of the straight edge (14) is provided with a transition arc-shaped edge (16), and the straight edge (14) is uniformly transit, the other end of the straight edge (14) is uniformly transited with the arc-shaped edge (15).

3. The novel overload protection switch as claimed in claim 2, wherein a switch cap (17) is provided at an end of the switch body (2) located outside the protection housing (1), a flange (18) is provided at an edge of an open end of the switch cap (17), a top end of the ejection device (10) penetrates through a top of the protection housing (1) to contact with the flange (18), the switch body (2) is fixedly connected with a bottom center of the switch cap (17), a first spring (19) is provided at an end of the switch body (2) located inside the protection housing (1), and the switch body (2) is elastically connected with the first pin (3) through the first spring (19).

4. The novel overload protection switch according to claim 3, wherein the ejection device (10) comprises a spacer (20) and a second spring (21), the bottom of the protection housing (1) is provided with a limiting seat (22), the bottom end of the spacer (20) is provided with a U-shaped groove (23) matched with the limiting seat (22), one side of the spacer (20) is provided with an L-shaped notch (24), the L-shaped notch (24) is located at the bottom end of the spacer (20) and is located at the side surface of the U-shaped groove (23), one side of the L-shaped notch (24) is perpendicular to the side wall of the U-shaped groove (23), the other side of the L-shaped notch (24) is parallel to the side wall of the U-shaped groove (23), one side of the L-shaped notch (24) perpendicular to the side wall of the U-shaped groove (23) is provided with a limiting plate (25), and the limiting plate (25) is located at one end of one side of the L-, the other end on one side of L type breach (24) links up rather than another limit mutually, limiting plate (25) are located to the pot head of spring two (21), the other end of spring two (21) contacts with the bottom of protection casing (1), the corresponding opposite side of spacing block (20) is equipped with respectively with moving contact (7) and static contact two (9) assorted dodge groove one (26), spacing block (20) are equipped with and dodge the top that one side top of groove one (26) runs through protection casing (1) and contact with turn-ups (18), the top that one side top that spacing block (20) were equipped with L type breach (24) runs through protection casing (1) is located outside protection casing (1).

5. The novel overload protection switch according to claim 4, wherein the protection housing (1) comprises an upper cover (27), a base (28) and a side cover (29), the base (28) is located at the bottom of the upper cover (27), the side cover (29) is located at the side of the upper cover (27), a mounting cylinder (30) matched with the switch body (2) is fixedly connected to the top of the upper cover (27), two mounting blocks (31) are arranged on the outer side wall of the mounting cylinder (30), one mounting block (31) is located at one side of the mounting cylinder (30), the other mounting block (31) is located at the other side corresponding to the mounting cylinder (30), a avoiding groove two (32) matched with the mounting block (31) is arranged at the top end of the isolating sheet (20), and the avoiding groove two (32) is located between the L-shaped notch (24) and the avoiding groove one (26), the bottom of dodging groove two (32) is located protection casing (1), installation piece (31) contacts with the top of upper cover (27), bottom one side of upper cover (27) is equipped with dodges breach (33) with pin (3) assorted, the corresponding opposite side of upper cover (27) and side cap (29) joint, all the other both sides of upper cover (27) all are equipped with draw-in groove (34), be equipped with on base (28) with draw-in groove (34) assorted buckle (35), base (28) through buckle (35) and draw-in groove (34) phase-match demountable installation on upper cover (27).

6. The novel overload protection switch as claimed in claim 5, wherein the base (28) is provided at a center thereof with a mounting plate (36), the first pin (3) is located at one side of the mounting plate (36), the limiting seat (22), the second pin (4) and the metal spring (6) are located at the other side of the mounting plate (36), one end of the first pin (3) is detachably mounted on the base (28) and is provided with an elastic sheet (37), one end of the elastic sheet (37) is located between the metal sheet (5) and the switch body (2) and is elastically connected with the switch body (2) through a first spring (19), the other end of the elastic sheet (37) is provided with a transition arc surface (38), the elastic sheet (37) is fixedly connected with the first pin (3) through the transition arc surface (38) and is integrated, and the elastic sheet (37) and the first pin (3) form an acute angle, the other end of the first pin (3) penetrates through the avoidance notch (33) and is located outside the protective shell (1).

7. The novel overload protection switch as recited in claim 6, wherein the metal sheet (5) is L-shaped, the metal sheet (5) is located on the side of the first pin (3), one side of the metal sheet (5) is detachably connected to the base (28) and is located on the same side of the mounting plate (36) as the first pin (3), the first stationary contact (8) is located on one side of the metal sheet (5) detachably connected to the base (28), the first stationary contact (8) is located on one side of the metal sheet (5) and corresponds to the position of the elastic sheet (37), the other end of one side of the metal sheet (5) penetrates through the mounting plate (36) and is fixedly connected to the other side of the metal sheet (5), and the second stationary contact (9) is located on the other side of the metal sheet (5).

8. The novel overload protection switch as recited in claim 7, wherein the second pin (4) is L-shaped, one side of the second pin (4) is detachably connected to the base (28), the other side of the second pin (4) is fixedly connected to the arc-shaped piece (11) through the rectangular piece (12), one end of the side of the detachable connection of the second pin (4) to the base (28) penetrates through the side cover (29) and is located outside the protection housing (1), the other end of the detachable connection of the second pin (4) is fixedly connected to the other side of the side cover and forms a whole, the second pin (4) is provided with an L-shaped limit post (39), one side of the L-shaped limit post (39) is fixedly connected to the side of the second pin (4), the other side of the L-shaped limit post (39) is located between the mounting plate (36) and the rectangular piece (12), and the other end of the second spring (21) is sleeved on one side of the L-shaped limit post (39) located between the mounting plate (36) and the rectangular piece ( The bottoms of the bodies (1) are in contact.

9. The novel overload protection switch as recited in claim 6, wherein the limiting seat (22) comprises a first limiting convex block (40) and a second limiting convex block (41) matched with the U-shaped groove (23), one side of the first limiting convex block (40) is fixedly connected with the mounting plate (36), the other side corresponding to the first limiting convex block (40) is fixedly connected with the second limiting convex block (41), one side of the spacer (20) is close to the metal elastic sheet (6), the other side corresponding to the spacer (20) is far away from the metal elastic sheet (6), the first limiting convex block (40) is located on one side of the spacer (20) far away from the metal elastic sheet (6), and the height of the first limiting convex block (40) is greater than that of the second limiting convex block (41).

10. The novel overload protection switch according to claim 4, wherein one end of the movable contact (7) is fixedly connected with the bottom of the groove (13), a first guiding inclined plane (42) is arranged at the edge of the other end of the movable contact (7) and is in contact with a second fixed contact (9), one end of the second fixed contact (9) is fixedly connected with the metal sheet (5), a second guiding inclined plane (43) is arranged at the edge of the other end of the second fixed contact (9) and is in contact with the movable contact (7), and first chamfered edges (44) corresponding to the first guiding inclined plane (42) and second chamfered edges (45) corresponding to the second guiding inclined plane (43) are arranged at the edges of the two sides of the first avoiding groove (26).