CN216849734U

CN216849734U - Self-locking key overload protection switch

Info

Publication number: CN216849734U
Application number: CN202220257821.3U
Authority: CN
Inventors: 钟子豪
Original assignee: Huian Dongguan Technology Co ltd
Current assignee: Huian Dongguan Technology Co ltd
Priority date: 2022-02-08
Filing date: 2022-02-08
Publication date: 2022-06-28
Anticipated expiration: 2032-02-08

Abstract

The utility model discloses a self-locking button overload protection switch, which comprises a body, a button, a thermal bimetallic strip, a first elastic piece, a positioning rod and a positioning linkage sheet; the key is movably arranged at the upper opening of the power connection chamber of the body, and at least one first elastic piece is connected between the key and the body; the thermal bimetallic strip is arranged in the electric connection chamber, and the clamping part of the thermal bimetallic strip is connected with an overload protection spring plate; the positioning rod is movably connected between the key and the body, a convex rod is formed at the lower end of the positioning rod, and the convex rod bends to point into an annular ladder way arranged on the body; an inclined lug is arranged in the annular ladder way; the positioning linkage sheet is positioned at one side of the opening of the annular ladder way and can swing left and right relative to the annular ladder way; one end of the positioning linkage sheet is provided with a hook part for hooking the electric connection part; the positioning linkage piece is also provided with a slot matched with the annular ladder way; the convex rod passes through the slot and then extends into the annular ladder way. The utility model has the advantages of convenient assembly and use, etc.

Description

Self-locking key overload protection switch

Technical Field

The utility model relates to the technical field of switches, specifically relate to a auto-lock button overload protection switch.

Background

With the increasing living standard of people, various household appliances enter thousands of households, and accordingly, due to improper use of the household appliances or due to the quality problems of the household appliances, safety accidents such as fire disasters caused by circuit overload or short circuit occur, and research and development of power utilization safety products such as overload protection switches and the like are generally regarded. Various overload protection switches appear in the prior art, but many current switches have the defects of complex structure, inconvenient assembly, inconvenient use, poor overload protection effect and the like.

Accordingly, there is a need for improvements in the art.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists above, the utility model aims at providing a auto-lock button overload protection switch, it has advantages such as simple structure is reasonable, the equipment is convenient, the use is convenient and overload protection is effectual.

In order to realize the purpose, the technical scheme of the utility model is that:

a self-locking key overload protection switch comprises a body, keys, a thermal bimetallic strip, a first elastic piece, a positioning rod and a positioning linkage sheet; the key is movably arranged at an upper opening of the power connection chamber of the body, and at least one first elastic piece is connected between the key and the body; the thermal bimetallic strip is arranged in the electric connection chamber and consists of a fixing part, an electric connection part, a lifting part and a clamping part; the fixing part is fixedly arranged; the electric connection part is provided with an electric connection contact matched with the pin; the clamping part is connected with an overload protection spring plate; the positioning rod is movably connected between the key and the body, a convex rod is formed at the lower end of the positioning rod, and the convex rod bends to point to an annular ladder way arranged on the body; an inclined lug is arranged in the annular ladder way; the positioning linkage sheet is positioned on one side of the opening of the annular ladder way and can swing left and right relative to the annular ladder way; one end of the positioning linkage sheet is provided with a hook part for hooking the electric connection part; the positioning linkage piece is also provided with a slot matched with the annular ladder way; the convex rod penetrates through the open slot and then extends into the annular ladder way; the key is used for driving the protruding rod to move in the groove and the annular ladder way in a matched mode, and the contact or disconnection of the thermal bimetallic strip and the pins is synchronously achieved.

For the additional structure of the above technical scheme, the following scheme is also included:

as a specific embodiment, the slot is divided into a first track channel, a second track channel and a third track channel which are connected in sequence; the left side of the slot is provided with the first track channel, the lower ends of the lower side and the right side of the slot are provided with the second track channel, and the upper end of the right side of the slot is provided with the third track channel.

Further, the first track channel is in an inverted 7 shape; the left side of the second track channel is in an inverted V shape, and the right side of the second track channel is in an upward inclined shape; the third track channel is inclined upwards.

As a specific embodiment, the positioning linkage plate is integrally formed.

As a specific embodiment, a clamping groove is arranged on the hook part of the positioning linkage plate, and the clamping groove movably clamps one side of the power connection part.

As a specific embodiment, a fixing column is arranged on the key, a through hole is arranged at the upper end of the positioning rod, the positioning rod is sleeved on the fixing column through the through hole, and a second elastic piece used for abutting against the upper end of the positioning rod is further arranged on the fixing column.

Further, the first elastic member and the second elastic member are both springs.

As a specific embodiment, the positioning linkage plate is movably connected to the body through a bolt, so that the positioning linkage plate can swing left and right relative to the annular ladder way.

As a specific embodiment, an adjusting screw is arranged in the body, the overload protection elastic sheet is in a shape like a 'V', one end of the overload protection elastic sheet is connected with the adjusting screw, the other end of the overload protection elastic sheet is clamped with the clamping portion of the thermal bimetallic strip, and the clamping portion is in a shape like a 'T'.

As a specific embodiment, an electrical post is provided on the pin for mating with the electrical contact.

The utility model has the advantages that:

the utility model has the advantages of simple and reasonable structure, convenient assembly, convenient use, good overload protection effect and the like; the key is pressed up and down to be used conveniently and quickly, the protruding rod driving the positioning rod through the key is moved in the groove and the annular ladder way in a matched mode, power on or power off can be achieved conveniently, the overload protection elastic piece is arranged to ensure that the overload protection elastic piece can bounce the power connection part and the power connection contact when the switch is overloaded, overload protection is achieved, safety of an electric appliance is protected, and use safety is improved.

Drawings

Fig. 1 is an exploded schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of the thermal bimetal and the overload protection spring of the present invention;

fig. 3 is a schematic structural diagram of the positioning linkage plate of the present invention;

fig. 4 is a structural schematic diagram of the slot of the present invention;

fig. 5 is a schematic view showing the first principle of the present invention;

FIG. 6 is a schematic view of the usage principle of the present invention;

fig. 7 is a third schematic view of the usage principle of the present invention;

fig. 8 is a fourth schematic view of the usage principle of the present invention.

Reference numerals:

1. a body; 101. a power connection chamber; 2. pressing a key; 3. a thermal bimetallic strip; 31. a fixed part; 32. an electric connection part; 33. a pulling section; 34. a clamping part; 35. connecting an electrical contact; 4. a first elastic member; 5. positioning a rod; 51. a nose bar; 6. positioning the linkage sheet; 61. a hook portion; 611. a card slot; 62. grooving; 621. a first trajectory path; 622. a second trajectory path; 623. a third tracking channel; 7. an overload protection spring plate; 8. an annular ladder way; 81. a beveled tab; 9. a second elastic member; 10. a bolt; 11. adjusting screws; 12. and connecting the electric pole.

Detailed Description

The invention will be further elucidated with reference to the drawings and the embodiments, which are exemplary only and do not limit the scope of the invention.

As shown in fig. 1-4, a self-locking button overload protection switch includes a body 1, a button 2, a thermal bimetallic strip 3, a first elastic element 4, a positioning rod 5 and a positioning linkage 6; a power receiving chamber 101 is arranged in the body 1; the key 2 is movably installed at the upper opening of the power connection chamber 101, and at least one first elastic member 4 is connected between the key 2 and the body 1, in this embodiment, two first elastic members 4 are symmetrically arranged; the thermal bimetallic strip 3 is arranged in the power connection chamber 101, and the thermal bimetallic strip 3 consists of a fixing part 31, a power connection part 32, a pulling part 33 and a clamping part 34; the fixing part 31 is fixedly arranged; the electric connection part 32 is provided with an electric contact 35 for engaging with a pin (not shown); the clamping part 34 is connected with an overload protection spring sheet 7; the positioning rod 5 is movably connected between the key 2 and the body 1, a convex rod 51 is formed at the lower end of the positioning rod 5, and the convex rod 51 is bent to point into an annular ladder way 8 arranged on the body 1; a slant protruding piece 81 is arranged in the annular ladder way 8; the positioning linkage sheet 6 is positioned at one side of the opening of the annular ladder way 8 and can swing left and right relative to the annular ladder way 8; a hook part 61 for hooking the electric connection part 32 is arranged at one end of the positioning linkage plate 6; the positioning linkage sheet 6 is also provided with a slot 62 matched with the annular ladder way 8; the protruding rod 51 passes through the slot 62 and then extends into the annular ladder way 8; the key 2 is used for driving the protruding rod 51 to move in the slot 62 and the annular ladder way 8 in a matching manner, and synchronously realizing the contact or disconnection of the thermal bimetallic strip 3 and the pin. The utility model has the advantages of simple and reasonable structure, convenient assembly, convenient use, good overload protection effect and the like; the button 2 is pressed to be used conveniently and quickly, the convex rod 51 which drives the positioning rod 5 through the button 2 is matched with and moved in the groove 62 and the annular ladder way 8, the power-on or power-off can be conveniently realized, the arrangement of the overload protection elastic sheet 7 can ensure that the switch can bounce the power-on part 32 and the power-on contact 35 when the switch is overloaded, the overload protection is realized, the safety of an electric appliance is protected, and the use safety is improved.

The slot 62 is divided into a first track channel 621, a second track channel 622 and a third track channel 623 which are connected in sequence; the left side of the slot 62 is a first track passage 621, the lower and right side lower ends of the slot 62 are second track passages 622, and the right side upper end of the slot 62 is a third track passage 623. Specifically, the first trace path 621 is in an inverted "7" shape; the left side of the second track channel 622 is in an inverted V shape, and the right side of the second track channel 622 is in an upward inclined shape; the third tracking channel 623 is also inclined upward. Through the arrangement, the protruding rod 51 can be ensured to move in the slot 62, and the positioning linkage plate 6 can be driven to slide in a specific direction.

Since the annular channel 8 is prior art, it will not be described in detail here.

In this embodiment, the positioning linkage plate 6 is integrally formed, so that the production and the manufacture can be facilitated.

A clamping groove 62 is arranged on the hook 61 of the positioning linkage plate 6, and the clamping groove 62 movably clamps one side of the electric connection part 32, so that the positioning linkage plate 6 can conveniently drive the thermal bimetallic strip 3.

A fixing column (not shown) is arranged on the key 2, a through hole is arranged at the upper end of the positioning rod 5, the positioning rod 5 is sleeved on the fixing column through the through hole, and a second elastic piece 9 used for abutting against the upper end of the positioning rod 5 is further arranged on the fixing column. Through the arrangement, the positioning rod 5 can be conveniently installed, and the positioning rod 5 is prevented from loosening.

Preferably, the first elastic member 4 and the second elastic member 9 are both springs, so that elasticity can be ensured.

The positioning linkage plate 6 is movably connected to the body 1 through a bolt 10, so that the positioning linkage plate 6 can swing left and right relative to the annular ladder way 8. Specifically, a through hole is arranged in the middle of the positioning linkage plate 6, and the bolt 10 is connected to the body 1 after passing through the through hole.

Be provided with adjusting screw 11 in body 1, overload protection shell fragment 7 is "V" font, and the one end and the adjusting screw 11 of overload protection shell fragment 7 are connected, and the other end of overload protection shell fragment 7 and the joint 34 joint of hot bimetallic strip 3, joint 34 are "T" font. Through the arrangement, the overload protection elastic sheet 7 and the thermal bimetallic strip 3 can be conveniently connected and matched.

Electrical posts 12 are also provided on the pins for mating with electrical contacts 35.

Of course, the pins of the overload protection switch of the self-locking key can be set to be three pins or two pins according to requirements, for example, when the pins are three pins, that is, the pins are the first pin, the second pin and the third pin. When the connector is mounted, the fixing part 31 is fixed with the first pin, and the electric pole 12 is arranged on the second pin. The first pin is connected with a live wire of mains supply, the second pin is connected with electric equipment, the third pin is connected with a zero line of the mains supply, and the hot bimetallic strip 3 controls the connection and disconnection between the first pin and the second pin.

The use principle of the utility model is introduced below so as to understand the utility model:

firstly, as shown in fig. 5 and 6, when the key 2 is pressed, the key 2 downwardly links the positioning rod 5 downwardly, the protruding rod 51 moves leftwards and downwardly in the annular ladder way 22, so that the protruding rod 51 moves in the first track channel 621, the positioning linking sheet 6 is driven to rotate leftwards until the left end of the positioning linking sheet 6 faces downwards and drives the electrical contact 35 to press against the electrical contact 12 to form a passage, and the protruding rod 51 moves to the tail end of the first track channel 621 at this time; as shown in fig. 7, after the key 2 is released, the key 2 moves upward due to the elastic force of the first elastic member 4, and drives the protruding rod 51 to move rightward and leftward at the lower left of the annular ladder way 8, so that the protruding rod 51 moves rightward along the first section at the left side of the second track channel 622 until the protruding rod 51 is clamped at the end of the right side of the second track channel 622, the movement track is the same as the direction of the arrow shown in fig. 7, and the positioning linkage plate 6 is always driven to rotate leftward due to the elasticity of the first elastic member 4, so that the positioning linkage plate 6 is in a positioning state, and it is ensured that the electrical contact 35 is always in contact with and conducted with the electrical contact 12; as shown in fig. 8, when the circuit needs to be disconnected, the key 2 is pressed, as shown by the arrow direction in fig. 7, the key 2 drives the protruding rod 51 to correspondingly move to the lower right in the annular channel 8, drives the protruding rod 51 to move downward and contact with the second section on the left side of the second track channel 622, and then moves to the end of the second section on the left side of the second track channel 622 through guiding, that is, the position of fig. 8, and can drive the positioning linkage 6 to rotate rightward in the process of moving the protruding rod 51 downward, so as to separate the electrical contact 35 from the electrical post 12 to form an open circuit; finally, after the key 2 is released, the key 2 drives the protruding rod 51 to correspondingly move from the lower right to the upper end in the circular ladder way 8 by using the elasticity of the first elastic member 4, and synchronously drives the protruding rod 51 to directly move upwards from the end of the left side of the second track channel 622 to the head end of the first track channel 621, that is, the protruding rod 51 returns to the position shown in fig. 5 again, so that the on and off of the switch is completed once, and the power on and off are realized.

As shown in fig. 7, when the switch is in an on state and the switch is overloaded, an excessive current causes the thermal bimetal 3 to generate heat, expand and deform, and cause the electrical connection portion 32, the lifting portion 33 and the latching portion 34 to have a tendency of tilting upward, wherein the deformation amount of the portion between the lifting portion 33 and the latching portion 34 that bends downward is the largest, the latching portion 34 tilts upward to drive one end of the overload protection spring 7 to move upward together, when the latching portion 34 of the thermal bimetal 8 tilts upward and is substantially flush with the electrical connection portion 32, the direction of the elastic force of the end of the overload protection spring 7 connected with the latching portion 34 is tilted upward, so that the overload protection spring 7 bounces the latching portion 34 of the thermal bimetal 3, and the electrical contact 35 is separated from the electrical connection post 12 to form an open circuit, thereby performing the overload protection function, and at the same time, the positioning linkage 6 is driven to rotate rightward when the latching portion 34 bounces, the protruding rod 51 is separated from the right end of the second track passage 622, and then the elastic force of the first elastic member 4 drives the protruding rod 51 to move to the upper end in the annular ladder way 8 correspondingly, and synchronously drives the protruding rod 51 to move upward to the head end of the first track passage 621, i.e. the protruding rod 51 returns to the position shown in fig. 5.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.

Claims

1. The utility model provides a auto-lock button overload protection switch which characterized in that:

comprises a body, a key, a thermal bimetallic strip, a first elastic piece, a positioning rod and a positioning linkage sheet; the key is movably arranged at the upper opening of the power connection chamber of the body, and at least one first elastic piece is connected between the key and the body; the thermal bimetallic strip is arranged in the electric connection chamber and consists of a fixing part, an electric connection part, a lifting part and a clamping part; the fixing part is fixedly arranged; the electric connection part is provided with an electric connection contact matched with the pin; the clamping part is connected with an overload protection spring plate; the positioning rod is movably connected between the key and the body, a convex rod is formed at the lower end of the positioning rod, and the convex rod bends to point to an annular ladder way arranged on the body; an inclined lug is arranged in the annular ladder way; the positioning linkage sheet is positioned on one side of the opening of the annular ladder way and can swing left and right relative to the annular ladder way; one end of the positioning linkage sheet is provided with a hook part for hooking the electric connection part; the positioning linkage piece is also provided with a slot matched with the annular ladder way; the convex rod penetrates through the slot and then extends into the annular ladder way; the key is used for driving the protruding rod to move in the groove and the annular ladder way in a matched mode, and the contact or disconnection of the thermal bimetallic strip and the pins is synchronously achieved.

2. The overload protection switch with self-locking key of claim 1, wherein:

the slotting is divided into a first track channel, a second track channel and a third track channel which are connected in sequence; the left side of the slot is provided with the first track channel, the lower ends of the lower side and the right side of the slot are provided with the second track channel, and the upper end of the right side of the slot is provided with the third track channel.

3. The overload protection switch with self-locking key according to claim 2, wherein:

the first track channel is in an inverted 7 shape; the left side of the second track channel is in an inverted V shape, and the right side of the second track channel is in an upward inclined shape; the third track channel is inclined upwards.

4. The overload protection switch with self-locking key of claim 1, wherein:

the positioning linkage sheet is integrally formed.

5. The overload protection switch with self-locking key of claim 1, wherein:

the hook part of the positioning linkage plate is provided with a clamping groove, and the clamping groove movably clamps one side of the electric connection part.

6. The overload protection switch with self-locking key of claim 1, wherein:

the button is provided with a fixed column, the upper end of the positioning rod is provided with a through hole, the positioning rod is sleeved on the fixed column through the through hole, and the fixed column is further provided with a second elastic piece for abutting against the upper end of the positioning rod.

7. The overload protection switch with self-locking button as claimed in claim 6, wherein:

the first elastic piece and the second elastic piece are both springs.

8. The overload protection switch with self-locking key of claim 1, wherein:

the positioning linkage plate is movably connected to the body through a bolt, so that the positioning linkage plate can swing left and right relative to the annular ladder way.

9. The overload protection switch with self-locking key of claim 1, wherein:

the body is internally provided with an adjusting screw, the overload protection elastic sheet is V-shaped, one end of the overload protection elastic sheet is connected with the adjusting screw, the other end of the overload protection elastic sheet is clamped with the clamping part of the thermal bimetallic strip, and the clamping part is T-shaped.

10. The overload protection switch with self-locking key of claim 1, wherein:

and the pin is provided with an electric connecting column matched with the electric connecting contact.