Temperature protector

Abstract

The utility model relates to a temperature protector, which comprises a contact cover, a base and a cover plate, a cavity for accommodating a temperature sensing component is formed between the contact cover and the base, a cavity for accommodating a switch component is formed between the base and the cover plate, the temperature protector further comprises a push rod, the push rod penetrates through the base and the accommodating temperature sensing component, and the switch component can be driven by the push rod to realize switch matching. The temperature sensing component comprises a bimetallic strip and a diaphragm, and the switch component comprises a reed, a movable contact, a static contact, a static contact piece and a terminal. According to the technical scheme, the structure is reasonable, the size can be smaller, and installation and use in a narrow space can be met.

Description

Technical Field

[0001] The utility model relates to a temperature protection device, in particular to a temperature protection device suitable for household electrical appliances. Background Art

[0002] The temperature protector is an automatic control element that physically deforms inside the switch according to the temperature change of the working environment, thereby producing certain special effects and realizing the disconnection or connection of the circuit. As people's quality of life continues to improve, more and more small household appliances such as electric water heaters, coffee pots, disinfection cabinets, microwave ovens and water dispensers are widely used. Since the above-mentioned household appliances all have electric heating functions, temperature protectors are needed to ensure the safety of the equipment. However, while continuously improving product functions and beautiful appearance, the design of small household appliances is gradually becoming smaller and more convenient. Therefore, the temperature protector must also follow the structural design requirements of the small household appliance product and improve its installation and use requirements. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a temperature protector, including a contact cover, a base and a cover plate, a cavity for accommodating a temperature sensing component is formed between the contact cover and the base, a cavity for accommodating a switch component is formed between the base and the cover plate, and also includes a push rod, which passes through the base, and accommodates the temperature sensing component and can drive the switch component through the push rod to achieve switch coordination, the temperature sensing component includes a bimetallic strip and a diaphragm, and the switch component includes a reed, a moving contact, a static contact, a static contact and a terminal.

[0004] Preferably, the rear end of the reed is fixedly connected to the raised part of the terminal, the front end of the reed is fixedly connected to the moving contact, the static contact is fixedly connected to the static contact piece, the static contact piece and the terminal are arranged opposite to each other, the moving contact and the static contact are in separable contact cooperation, that is, a group of switch accessories are formed, the switch component includes two groups of switch accessories that are oppositely and flipped between the base and the cover plate, and the push rod is in contact and cooperation with the two groups of switch accessories at the same time.

[0005] Preferably, the bimetallic strip and the diaphragm are stacked up and down to form a whole.

[0006] Preferably, the push rod includes a movable column and a pressure block, a partition plate is provided in the inner cavity of the base, the upper end of the movable column passes through the partition plate and contacts and cooperates with the diaphragm, the lower end of the movable column passes through the cover plate and is exposed, the pressure block is located in the inner cavity of the base and between the partition plate and the cover plate, and the two ends of the pressure block are respectively in contact and cooperate with the reeds of the two sets of switch accessories;

[0007] The contact cover is buckled and arranged above the base, and the cover plate is buckled and arranged below the base. The static contact piece and the terminal of each set of switch accessories are fixedly installed between the base and the cover plate by rivets, and the pins of the static contact piece and the terminal are exposed from the cover plate.

[0008] Preferably, the cover plate has two relatively arranged assembly pressing surfaces one, the cover plate is provided with a raised buckle on each assembly pressing surface one, the base has two relatively arranged assembly pressing surfaces two, the base is provided with a buckle groove on each assembly pressing surface two, the raised buckle is interference fit with the buckle groove, the cover plate is buckled and arranged under the base, and the static contact piece and terminal of each group of switch accessories are fixedly installed between the assembly pressing surface one and the assembly pressing surface two by rivets, the cover plate is provided with a baffle relatively arranged between the two assembly pressing surfaces one, the base is provided with a groove matching the baffle relatively arranged between the two assembly pressing surfaces two, and the plate surface of the cover plate is provided with a countersunk hole group matching the moving contact.

[0009] Preferably, the spring is fixed to the terminal by rivets, a square hole is formed on the spring, a boss is provided on the terminal to match the square hole, and a square countersunk hole matching the square hole and the boss is formed at two locations on the assembly pressing table of the base.

[0010] Preferably, the inner cavity of the base is located above the partition plate and is provided with a limiting arc block that matches the outer contour of the bimetallic strip and the diaphragm.

[0011] Preferably, the contact cover is made of aluminum, the top of the contact cover has a contact plane, the contact cover has a claw, and the upper end of the base has a claw-engaging groove matched with the claw.

[0012] By means of the above solution, the utility model has at least the following advantages:

[0013] The technical solution of the present application can achieve a smaller volume and meet the requirements of installation and use in narrow spaces. The contact cover, base and cover plate are not only easy to disassemble and assemble, but can also be snap-fitted and set as an integral whole. At the same time, a temperature sensing component and a switch component can be set in a limited inner cavity, and the temperature sensing component and the switch component are connected by a push rod to realize the switching action.

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment. It should be understood that the following drawings only show a certain embodiment of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a temperature protector of the present application;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the contact cover of the present application;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the base of the present application;

[0019] Figure 4 Another three-dimensional structural schematic diagram of the base of the present application;

[0020] Figure 5 It is a schematic diagram of the structural relationship between the temperature sensing component and the switch component of the present application;

[0021] Figure 6 It is a schematic diagram of the structural relationship between the reed, the moving contact, the stationary contact, the stationary contact piece and the terminal of the present application;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the cover plate of the present application;

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the push rod of the present application;

[0024] Fig. 9 It is a three-dimensional structural schematic diagram of the reed of the present application.

[0025] In the figure: 1 contact cover, 2 base, 3 cover plate, 4 switch member, 5 push rod, 6 bimetallic strip, 7 diaphragm, 8 reed, 9 moving contact, 10 static contact, 11 static contact piece, 12 terminal, 13 movable column, 14 pressure block, 15 partition plate, 16 assembly pressing table one, 17 raised buckle, 18 assembly pressing table two, 19 bayonet groove, 20 baffle, 21 groove, 22 countersunk hole group, 23 square hole, 24 boss, 25 square countersunk hole, 26 limit arc block, 27 claw, 28 claw buckling groove. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] See also Figures 1 to 9 A temperature protector according to a preferred embodiment of the utility model comprises a contact cover 1, a base 2 and a cover plate 3. A cavity for accommodating a temperature sensing component is formed between the contact cover 1 and the base 2. A cavity for accommodating a switch component 4 is formed between the base 2 and the cover plate 3. The temperature protector also comprises a push rod 5, which passes through the base 2. The temperature sensing component can drive the switch component 4 through the push rod 5 to achieve switch coordination. The temperature sensing component comprises a bimetallic strip 6 and a diaphragm 7. The switch component 4 comprises a reed 8, a moving contact 9, a static contact 10, a static contact piece 11 and a terminal 12.

[0028] A bimetallic strip 6 and a diaphragm 7 are installed between the contact cover 1 and the base 2, and a switch component 4 is installed between the base 2 and the cover plate 3. The contact cover 1 is in contact with the heat source to transfer heat to the bimetallic strip 6 and the diaphragm 7. The bimetallic strip 6 and the diaphragm 7 are deformed to drive the push rod 5 to drive the switch component 4 to realize the switching action.

[0029] Preferably, the rear end of the reed 8 is fixedly connected to the raised part of the terminal 12, the front end of the reed 8 is fixedly connected to the moving contact 9, the static contact 10 is fixedly connected to the static contact 11, the static contact 11 and the terminal 12 are arranged opposite to each other, the moving contact 9 and the static contact 10 are in separable contact cooperation, that is, forming a group of switch accessories, the switch component 4 includes two groups of switch accessories that are oppositely and flipped and arranged between the base 2 and the cover plate 3, and the push rod 5 is in contact and cooperation with the two groups of switch accessories at the same time.

[0030] While the two sets of switch accessories are arranged side by side, one set of the switch accessories is flipped 180 degrees.

[0031] Preferably, the bimetallic strip 6 and the diaphragm 7 are stacked up and down to form a whole.

[0032] Preferably, the push rod 5 includes a movable column 13 and a pressure block 14, a partition plate 15 is provided in the inner cavity of the base 2, the upper end of the movable column 13 passes through the partition plate 15 and contacts and cooperates with the diaphragm 7, the lower end of the movable column 13 passes through the cover plate 3 and is exposed, the pressure block 14 is located in the inner cavity of the base 2 and between the partition plate 15 and the cover plate 3, and the two ends of the pressure block 14 are respectively in contact and cooperate with the reeds 8 of the two sets of switch accessories;

[0033] The contact cover 1 is buckled and arranged on the top of the base 2, and the cover plate 3 is buckled and arranged on the bottom of the base 2. The static contact piece 11 and the terminal 12 of each set of switch accessories are fixed between the base 2 and the cover plate 3 by rivets, and the pins of the static contact piece 11 and the terminal 12 are exposed from the cover plate 3.

[0034] The bolts can pass through the base 2, the static contact piece 11, the terminal 12 to the assembly pressing table 16 of the cover plate 3 to fix the static contact piece 11 and the terminal 12 between the base 2 and the cover plate 3. This connection method effectively and stably controls the internal resistance of the product, effectively reduces and stabilizes the heat generation of the product during use, and increases product reliability.

[0035] Preferably, the cover plate 3 has two relatively arranged assembly pressing surfaces 16, and the cover plate 3 is provided with a protruding buckle 17 on each assembly pressing surface 16, and the base 2 has two relatively arranged assembly pressing surfaces 18, and the base 2 is provided with a bayonet groove 19 on each assembly pressing surface 18. The protruding buckle 17 is interference fit with the bayonet groove 19, and the cover plate 3 is buckled and arranged under the base 2, and the static contact piece 11 and the terminal 12 of each group of switch accessories are fixedly installed between the assembly pressing surface 16 and the assembly pressing surface 18 by rivets, the cover plate 3 is relatively provided with a baffle 20 between the two assembly pressing surfaces 16, and the base 2 is relatively provided with a groove 21 matching with the baffle 20 between the two assembly pressing surfaces 18, and the plate surface of the cover plate 3 is provided with a countersunk hole group 22 matching with the moving contact 9.

[0036] The outer contour of the raised buckle 17 also has a guide strip structure, which is convenient for installation and reduces labor and material costs compared to fixing with screws or rivets.

[0037] The base 2 and the cover 3 have baffles 20 and grooves 21 on both sides, so that after the two are installed, the baffles 20 and the grooves 21 can fit together to prevent debris from entering the switch through the installation gap between the cover 3 and the base 2 and causing product performance degradation.

[0038] The countersunk hole group 22 can give way to the riveted portion between the moving contact 9 and the spring leaf 8, which can reduce the overall dimensions of the product.

[0039] Preferably, the spring leaf 8 is fixed to the terminal 12 by rivets, a square hole 23 is formed on the spring leaf 8, a boss 24 matching with the square hole 23 is formed on the terminal 12, and a square countersunk hole 25 matching with the square hole 23 and the boss 24 is formed on the second assembly pressing table 18 of the base 2.

[0040] The boss 24 is riveted to the square hole 23. Such a structure ensures that there is no relative rotation between the parts. The spring 8 and the terminal 12 are also welded, which greatly enhances the conductive effect between the spring 8 and the terminal 12 and can effectively control the heat stability caused by the contact between the spring 8 and the terminal 12.

[0041] Preferably, the inner cavity of the base 2 is located above the partition plate 15 and is provided with a limiting arc block 26 that matches the outer contours of the bimetallic strip 6 and the diaphragm 7 .

[0042] Preferably, the contact cover 1 is made of aluminum, the top of the contact cover 1 has a contact plane, the contact cover 1 has a claw 27 , and the upper end of the base 2 has a claw engaging groove 28 matched with the claw 27 .

[0043] The contact cover 1 is an aluminum cover, and the contact plane can be manufactured into a square or a circle, which can not only conduct heat quickly but also meet the requirements of installation and use in narrow spaces.

[0044] The working principle of the utility model is as follows:

[0045] The contact cover 1 is attached to the controlled electrical appliance to contact the external heat, and then the temperature is conducted to the bimetallic strip 6. The bimetallic strip 6 senses the temperature and then jumps, driving the diaphragm 7 to flip. After the diaphragm 7 flips, it pushes the push rod 5 to cause axial displacement. While the push rod 5 moves downward, the pressure block 14 applies pressure to the reed 8. Finally, the reed 8 is pushed by the force, causing the moving contact 9 and the static contact 10 connecting the circuit to be disconnected, thereby achieving the purpose of switching the circuit. After cooling, manually press the active column 13 to reset it.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A temperature protector, characterized in that: The invention comprises a contact cover (1), a base (2) and a cover plate (3); a cavity for accommodating a temperature sensing component is formed between the contact cover (1) and the base (2); a cavity for accommodating a switch component (4) is formed between the base (2) and the cover plate (3); the invention also comprises a push rod (5); the push rod (5) passes through the base (2); the temperature sensing component can drive the switch component (4) through the push rod (5) to achieve switch coordination; the temperature sensing component comprises a bimetallic strip (6) and a diaphragm (7); the switch component (4) comprises a reed (8), a moving contact (9), a stationary contact (10), a stationary contact sheet (11) and a terminal (12).

2. A temperature protector according to claim 1, characterized in that: The rear end of the spring (8) is fixedly connected to the protruding portion of the terminal (12), the front end of the spring (8) is fixedly connected to the moving contact (9), the static contact (10) is fixedly connected to the static contact (11), the static contact (11) and the terminal (12) are arranged opposite to each other, the moving contact (9) and the static contact (10) are in disconnectable contact cooperation, that is, a set of switch accessories is formed, the switch component (4) includes two sets of switch accessories that are opposite to each other and are flipped and arranged between the base (2) and the cover plate (3), and the push rod (5) is in contact cooperation with the two sets of switch accessories at the same time.

3. A temperature protector according to claim 1, characterized in that: The bimetallic strip (6) and the diaphragm (7) are stacked up and down to form a whole.

4. A temperature protector according to claim 1 or 2, characterized in that: The push rod (5) comprises a movable column (13) and a pressure block (14). A partition plate (15) is arranged in the inner cavity of the base (2). The upper end of the movable column (13) passes through the partition plate (15) and contacts and cooperates with the diaphragm (7). The lower end of the movable column (13) passes through the cover plate (3) and is exposed. The pressure block (14) is located in the inner cavity of the base (2) and between the partition plate (15) and the cover plate (3). The two ends of the pressure block (14) contact and cooperate with the reeds (8) of the two sets of switch accessories respectively. The contact cover (1) is buckled and arranged above the base (2), and the cover plate (3) is buckled and arranged below the base (2). The static contact piece (11) and the terminal (12) of each set of switch accessories are fixedly installed between the base (2) and the cover plate (3) by rivets, and the pins of the static contact piece (11) and the terminal (12) are exposed from the cover plate (3).

5. A temperature protector according to claim 4, characterized in that: The cover plate (3) has two assembly press-fitting surfaces (16) arranged opposite to each other, and a protruding buckle (17) is provided on each assembly press-fitting surface (16) of the cover plate (3). The base (2) has two assembly press-fitting surfaces (18) arranged opposite to each other, and a bayonet groove (19) is provided on each assembly press-fitting surface (18) of the base (2). The protruding buckle (17) and the bayonet groove (19) are interference-fitted, and the cover plate (3) is buckled and arranged below the base (2), and each set of switch accessories The static contact piece (11) and the terminal (12) respectively possessed by the cover plate (3) are fixedly mounted between the first assembly press-fitting table (16) and the second assembly press-fitting table (18) by means of rivets; the cover plate (3) is located between the two first assembly press-fitting tables (16) and is provided with a baffle (20) opposite thereto; the base (2) is located between the two second assembly press-fitting tables (18) and is provided with a groove (21) matching with the baffle (20) opposite thereto; and the plate surface of the cover plate (3) is provided with a countersunk hole group (22) matching with the moving contact (9).

6. A temperature protector according to claim 2, characterized in that: The spring sheet (8) is fixed to the terminal (12) by means of rivets, a square hole (23) is formed on the spring sheet (8), a boss (24) matching the square hole (23) is formed on the terminal (12), and a square countersunk hole (25) matching the square hole (23) and the boss (24) is formed on the base (2) at a second assembly press-fitting table (18).

7. A temperature protector according to claim 4, characterized in that: The inner cavity of the base (2) is located above the partition plate (15) and is provided with a limiting arc block (26) that matches the outer contours of the bimetallic strip (6) and the diaphragm (7).

8. A temperature protector according to claim 1, characterized in that: The contact cover (1) is made of aluminum. The top of the contact cover (1) has a contact plane. The contact cover (1) has a claw (27). The upper end of the base (2) has a claw engaging groove (28) that matches the claw (27).

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