CN219497634U

CN219497634U - Jump type temperature control protection switch

Info

Publication number: CN219497634U
Application number: CN202320947388.0U
Authority: CN
Inventors: 王忠正
Original assignee: Huizhou Hua Kai Wei Electronic Technology Co ltd
Current assignee: Huizhou Hua Kai Wei Electronic Technology Co ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-08-08
Anticipated expiration: 2033-04-24

Abstract

The utility model discloses a kick type temperature control protection switch, which comprises an encapsulation shell, wherein a protection structure is arranged in the encapsulation shell; the protection structure comprises: the device comprises a base, two connecting terminals, a plug, two leads, a bottom plate, a first contact, a connecting column and a deformation assembly; the utility model relates to the technical field of temperature control switches, in particular to a protection structure adopted by the scheme, which is divided into two on-off modes of current overload protection and over-temperature protection, when a sudden state such as short circuit is met, the current in the circuit suddenly and rapidly increases in a short time, then the heat generated in the circuit is greatly increased, the ambient temperature also rapidly rises to reach the action critical value of the temperature control switch, the circuit is disconnected, the temperature is prevented from further rising to protect electric appliances in the circuit, the risk of fire is further reduced, and the scheme is suitable for development and design of a circuit using environment which is applicable to wide markets and meets high requirements and high specifications, and has small volume and stable quality.

Description

Jump type temperature control protection switch

Technical Field

The utility model relates to the technical field of temperature control switches, in particular to a kick type temperature control protection switch.

Background

The temperature control switch is in a conductor state in a normal circuit environment, so in some special circuit use environments, the internal resistance requirement of the temperature control switch is higher, and the temperature control switch is formed by Q (heat) =I ² Rt shows that the heating value in the circuit is in direct proportion to the current, the resistance and the time, the internal resistance of the temperature control switch is as small as possible in order to prevent the spontaneous heating of the temperature control switch from affecting the operation of the circuit and to minimize the influence on the power supply of the circuit, the most basic requirement is to ensure that the switch can be normally opened and closed, the contact resistance of a movable contact is required to be smaller than 50mΩ (the internal resistance required by a special circuit is smaller than 30mΩ), and the insulation resistance is required to be larger than 5mΩ in order to prevent breakdown under certain voltage and time conditions;

the existing jump type circuit temperature control protection switch often has the following problems:

1. the internal resistance of the temperature control switch is large, so that the temperature control switch cannot be widely applied to circuits with high internal resistance requirements and cannot meet the use requirements;

2. the volume is large, and the design layout in the equipment circuit is difficult to adapt;

3. at present, the problem that the tolerance between the design temperature and the actual operation temperature is too large is commonly existed in the temperature control switch field, and misoperation is easy to occur, so that the normal operation of a main circuit is affected.

Disclosure of Invention

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the kick type temperature control protection switch comprises an encapsulation shell, wherein a protection structure is arranged in the encapsulation shell;

the protection structure comprises: the device comprises a base, two connecting terminals, a plug, two leads, a bottom plate, a first contact, a connecting column and a deformation assembly;

the base is embedded in the packaging shell, two connecting terminals are embedded in one side in the base, the plugging sleeve is sleeved at the upper ends of the two connecting terminals, one ends of two leads are respectively connected with one ends of the two connecting terminals, one end of a bottom plate is embedded in one side in the base and connected with the other end of one connecting terminal, a first contact is installed on one side of the upper end of the bottom plate, a connecting column is embedded in the other side in the base and connected with one end of the other connecting terminal, and a deformation assembly is positioned at the upper end of the base and connected with the upper end of the connecting column.

Preferably, the deformation assembly includes: an active metal sheet, a passive metal sheet, and a second contact;

one end of the active metal sheet is connected with the connecting column, the passive metal sheet is arranged at the upper end of the active metal sheet, and the second contact is arranged at one side of the lower end of the passive metal sheet.

Preferably, the second contact is attached to the first contact.

Preferably, a connecting cavity is arranged at one side of the upper end of the base.

Preferably, the upper end of the connecting column is positioned in the connecting cavity.

Preferably, the plug is embedded in the packaging shell.

The utility model provides a kick type temperature control protection switch. The beneficial effects are as follows: the protection structure adopted in the scheme is wholly divided into two on-off modes of current overload protection and over-temperature protection, when a sudden state such as short circuit is met, current in the circuit suddenly increases rapidly in a short time, then heat generated in the circuit is greatly increased, the ambient temperature also rapidly rises to reach an action critical value of a temperature control switch, the circuit is disconnected, the temperature is prevented from further rising to protect an electric appliance in the circuit, the risk of fire is further reduced, and the equipment works in a safe temperature.

Drawings

Fig. 1 is a schematic perspective view of a kick-type temperature control protection switch according to the present utility model.

Fig. 2 is a schematic front view of a kick-type temperature control protection switch according to the present utility model.

Fig. 3 is a schematic diagram of a schematic front sectional structure of a kick-type temperature control protection switch according to the present utility model.

Fig. 4 is a schematic rear sectional view of a kick-type temperature control protection switch according to the present utility model.

In the figure: 1. the packaging shell comprises a packaging shell body, a base, a connecting terminal, a base, a sealing plug, a lead, a base plate, a first contact, a connecting column, a connecting cavity and a connecting cavity.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

As shown in fig. 1-4, a jump type temperature control protection switch comprises a packaging shell 1, wherein a protection structure is arranged in the packaging shell 1;

the protection structure comprises: the device comprises a base 2, two connecting terminals 3, a plug 4, two leads 5, a bottom plate 6, a first contact 7, a connecting column 8 and a deformation assembly;

the base 2 is embedded in the packaging shell 1, the two connecting terminals 3 are embedded in one side in the base 2, the plug 4 is sleeved at the upper ends of the two connecting terminals 3, one end of the two lead wires 5 is connected with one end of the two connecting terminals 3 respectively, one end of the bottom plate 6 is embedded in one side in the base 2 and is connected with the other end of one connecting terminal 3, the first contact 7 is arranged on one side of the upper end of the bottom plate 6, the connecting column 8 is embedded in the other side in the base 2 and is connected with one end of the other connecting terminal 3, and the deformation component is positioned at the upper end of the base 2 and is connected with the upper end of the connecting column 8.

It should be noted that, when assembling, firstly, two leads 5 are connected with two connecting terminals 3 respectively, and the connection part of the leads 5 and the connecting terminals 3 is riveted and fixed through the plugs 4, then, the bottom plate 6 and the connecting columns 8 are connected with the two connecting terminals 3 respectively, then, one end of the deformation component is connected with the connecting columns 8, finally, the packaging shell 1 is sleeved at the upper ends of the base 2 and the plugs 4, and is fixed through the riveting method, when in use, firstly, the two leads 5 are connected with the normal working circuit of the electrical appliance, when in a sudden state such as short circuit, the current in the circuit suddenly increases in a short time, then, the heat generated in the circuit greatly increases, the environmental temperature also rises to reach the action critical value of the temperature control switch, the deformation component connected with the connecting columns 8 deforms, the second contact 11 at the upper end of the deformation component is disconnected with the first contact 7 at the upper end of the bottom plate 6, thus, when the temperature and the current are recovered to be normal, the deformation component resets, the second contact 11 is closed with the first contact 7 again, and the thermal sheet can continue to work by using the bimetallic strip technology: the working principle of the kick temperature control switch is that the temperature sensing sensitive element bimetallic strip is preformed and has a certain design temperature (40-165 ℃), when the environment temperature is changed, the active metal strip 9 can be bent and deformed, and when the active metal strip is bent to a certain degree, the loop is disconnected, so that the equipment stops working. The active metal sheet 9 is a composite functional material which is formed by firmly compositing two or more metals or alloys with different expansion coefficients along the whole contact surface and has regular curvature deformation along with temperature change. Among the constituent alloys of thermal bimetal, the constituent alloy layer having a higher expansion coefficient is generally called an active layer (B) or a high expansion layer (HES). The lower expansion coefficient component alloy layer is called a passive layer (C) or a low expansion Layer (LES). An intermediate layer with different thickness is added between the active layer B and the passive layer C as a diversion layer, and the diversion layer generally comprises pure Ni, pure Cu, zirconium copper and the like, and is mainly used for controlling the resistivity of the thermal bimetal, so that a series of resistive thermal bimetal with basically the same heat sensitivity and different resistivity can be obtained. The two different alloys are combined together, and heat can be generated after current passes through the two different alloys, and the two different alloys have different thermal expansion coefficients, so that the alloys tend to bend towards one direction, and the contact leaves, so that the power is cut off. The rate of bending is proportional to the magnitude of the current passing through and the ambient temperature and duration.

In a specific implementation, the deformation assembly includes: an active metal sheet 9, a passive metal sheet 10 and a second contact 11;

one end of the active metal sheet 9 is connected with the connecting column 8, the passive metal sheet 10 is arranged at the upper end of the active metal sheet 9, and the second contact 11 is arranged at one side of the lower end of the passive metal sheet 10.

When the temperature is too high and the current is overloaded, the active metal sheet 9 is heated to generate internal stress to act rapidly, the active metal sheet 9 drives the passive metal sheet 10, the second contact 11 at the upper end of the passive metal sheet 10 is disconnected with the first contact 7 at the upper end of the bottom plate 6, a circuit of an electric appliance is cut off, the working current voltage or the circuit environment temperature of the equipment gradually drops to normal temperature to reach the reset temperature of the temperature control switch, at the moment, the active metal sheet 9 drives the passive metal sheet 10 to reset, the second contact 11 on the passive metal sheet 10 is closed again with the first contact 7 at the upper end of the bottom plate 6, and the equipment is restored to a normal working state, so that the circulation protection is achieved, and the equipment works at a safe temperature.

In a specific implementation, the second contact 11 is attached to the first contact 7.

In a specific implementation process, a connecting cavity 12 is arranged on one side of the upper end of the base 2.

In the implementation, the upper end of the connecting column 8 is located in the connecting cavity 12.

In a specific implementation process, the plug 4 is embedded in the packaging shell 1.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The term "comprising" an element defined by the term "comprising" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The kick type temperature control protection switch comprises a packaging shell (1) and is characterized in that a protection structure is arranged in the packaging shell (1);

the protection structure comprises: the device comprises a base (2), two connecting terminals (3), a plug (4), two leads (5), a bottom plate (6), a first contact (7), a connecting column (8) and a deformation assembly;

the base (2) is embedded in the packaging shell (1), two connecting terminals (3) are embedded in one side in the base (2), the plug (4) is sleeved at the upper ends of the two connecting terminals (3), one ends of the two leads (5) are respectively connected with one ends of the two connecting terminals (3), one end of the bottom plate (6) is embedded in one side in the base (2) and connected with the other end of one connecting terminal (3), the first contact (7) is installed on one side of the upper end of the bottom plate (6), the connecting column (8) is embedded in the other side in the base (2) and connected with one end of the other connecting terminal (3), and the deformation assembly is located at the upper end of the base (2) and connected with the upper end of the connecting column (8).

2. The kick temperature-controlled protection switch of claim 1, wherein the deformation assembly comprises: an active metal sheet (9), a passive metal sheet (10) and a second contact (11);

one end of the active metal sheet (9) is connected with the connecting column (8), the passive metal sheet (10) is installed at the upper end of the active metal sheet (9), and the second contact (11) is installed at one side of the lower end of the passive metal sheet (10).

3. A jump temperature controlled protection switch according to claim 2, characterized in that the second contact (11) is attached to the first contact (7).

4. The kick type temperature control protection switch according to claim 1, wherein a connecting cavity (12) is arranged on one side of the upper end of the base (2).

5. A jump temperature controlled protection switch according to claim 4, characterized in that the upper end of the connecting post (8) is located in the connecting chamber (12).

6. A jump temperature control protection switch according to claim 1, characterized in that the plug (4) is embedded in the encapsulation housing (1).