Subminiature temperature controller with automatic plug-in installation

Abstract

The utility model discloses an automatic plug-in installation subminiature temperature controller, which comprises a rubber shell, and a bottom plate, a bimetallic strip, a movable contact spring, a contact and an insulating seat assembly which are arranged in the rubber shell, the inner side of the rubber shell is provided with a first buckling part, one end of the bottom plate is connected with the bimetallic strip, the other end of the bottom plate is connected with the insulating seat assembly, and the bimetallic strip is connected with the insulating seat assembly. Second buckling parts are symmetrically arranged on the two sides of the insulating base assembly, the second buckling parts and the first buckling parts are connected in a buckled mode, and one end of the movable contact spring is connected with the bimetallic strip. By increasing the lengths of the first electrode and the second electrode, the first electrode and the second electrode can be directly inserted into the circuit board, and wire welding is avoided; and meanwhile, the internal device and the rubber shell are fixed by adopting a buckle type structure, so that dispensing fixation is avoided, the material cost, the labor cost and the management cost are reduced, and the manufacturing period of the product is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of thermostats, in particular to an ultra-small thermostat with automatic plug-in installation. Background Art

[0002] A thermostat (also known as a temperature control switch, temperature protector, temperature controller) refers to a series of automatic control components that, according to the temperature change of the working environment, undergo physical deformation inside the switch, thereby generating certain special effects and producing conduction or disconnection actions. An ultra-small thermostat is a type of such temperature control device with relatively small dimensions, characterized by its small size, and it has a wide range of applications in many fields. For example, in the electrical and electronic field, it can be used for temperature control or overheat and overload protection of circuit boards. When installing existing ultra-small thermostats, it is necessary to weld wires onto the circuit board. The welding process is complex, and the materials, equipment, and labor costs required for the wire welding process are relatively high. At the same time, the shell and internal components of such ultra-small thermostats are fixed by dispensing glue, which is time-consuming and laborious. Therefore, an ultra-small thermostat with automatic plug-in installation is needed to improve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an ultra-small thermostat with automatic plug-in installation, aiming to solve the above technical problems. By increasing the lengths of the first electrode and the second electrode, the first electrode and the second electrode can be directly inserted into the circuit board, avoiding the need to weld wires. At the same time, a snap-fit structure is used to fix the internal components and the plastic shell, avoiding the use of glue for fixing, reducing material costs, labor costs, and management costs, and shortening the manufacturing cycle of the product.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0005] An ultra-small thermostat with automatic plug-in installation includes a plastic shell, and a base plate, a bimetal strip, a moving reed, a contact, and an insulating seat assembly installed inside the plastic shell. The inner side of the plastic shell is provided with a first snap portion. One end of the base plate is connected to the bimetal strip, and the other end of the base plate is connected to the insulating seat assembly. Second snap portions are symmetrically arranged on both sides of the insulating seat assembly, and the second snap portions are snap-connected to the first snap portion. One end of the moving reed is connected to the bimetal strip, and the other end of the moving reed is riveted to the contact. One end of the insulating seat assembly is provided with a first electrode, and one end of the first electrode extends outwards through the plastic shell. One end of the base plate is provided with a second electrode, and one end of the second electrode extends outwards through the plastic shell. The first electrode mainly plays a role in guiding the uniform distribution of the electric field, and the insulating seat assembly supports the first electrode and ensures its normal connection with the electrical appliance to be measured.

[0006] Further, the first buckle portion includes a limit groove, a first abutting end portion, and a second abutting end portion, and the limit groove is located between the first abutting end portion and the second abutting end portion.

[0007] Further, the second buckle portion includes a protruding buckle limit portion, a third abutting end portion, and a fourth abutting end portion. The buckle limit portion is adapted to the limit groove. The third abutting end portion abuts against the first abutting end portion, and the fourth abutting end portion abuts against the second abutting end portion.

[0008] Further, the base plate includes a fixing plate and a supporting plate. Fixing seats are symmetrically arranged on the fixing plate. One end of the bimetallic sheet and one end of the moving spring piece are both connected to the fixing seats, and a pull tube hole is provided in the fixing seats.

[0009] Further, a supporting portion is provided on the upper end surface of the supporting plate. The supporting portion is in movable contact with the bimetallic sheet. Tightening portions and side seats are symmetrically arranged on the supporting plate respectively. The tightening portions are located near the supporting portion, and the side seats are located near the insulating seat assembly.

[0010] Further, a first through hole is provided at one end of the bimetallic sheet. One end of the bimetallic sheet is riveted to the fixing seat of the fixing plate through the first through hole.

[0011] Further, a second through hole is provided at one end of the moving spring piece. One end of the moving spring piece is sleeved on the fixing seat through the second through hole. A protruding portion and a connecting hole protruding downward are provided at the other end of the moving spring piece. The protruding portion is movably connected to the other end of the bimetallic sheet, and the contact is riveted to the moving spring piece through the connecting hole.

[0012] Further, the lower end surface of the insulating seat assembly is connected to the supporting plate, and side limit portions are further provided on both sides of the insulating seat assembly.

[0013] Further, the material of the plastic shell is any one of PBT material, ABS plastic material, plastic material, silica gel material, or PVC material.

[0014] The ultra-small temperature controller with automatic plug-in installation of the present utility model has the following beneficial effects:

[0015] 1. For the ultra-small temperature controller with automatic plug-in installation of the present utility model, by increasing the lengths of the first electrode and the second electrode, the first electrode and the second electrode can be directly inserted into the circuit board, avoiding the need for welding wire connection. The lengths and positions of the first electrode and the second electrode are fixed, the quality is stable, and at the same time, the materials, equipment, and labor costs required for the wire welding process are reduced;

[0016] 2. The ultra-small thermostat installed by automatic plug-in of the present utility model fixes the internal components and the plastic case by using a snap structure through the setting of a first snap portion and a second snap portion, avoiding the use of glue for fixing, and reducing the epoxy resin, equipment and labor costs required for the glue application process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram of the structure without the plastic case shown in;

[0019] Figure 3 is Figure 1 a schematic diagram of the structure of the plastic case shown in;

[0020] Figure 4 is a schematic diagram of the structural disassembly of the present utility model Figure 1 ;

[0021] Figure 5 is a schematic diagram of the structural disassembly of the present utility model Figure 2 ;

[0022] The reference numerals in the figure are:

[0023] 1. Plastic case; 2. Bottom plate; 3. Bimetallic strip; 4. Moving spring piece; 5. Contact; 6. Insulating seat assembly; 7. First electrode; 8. Second electrode; 9. Limiting groove; 10. First pressing end portion; 11. Second pressing end portion; 12. Snap limiting portion; 13. Third pressing end portion; 14. Fourth pressing end portion; 15. Fixed plate; 16. Support plate; 17. Fixed seat; 18. Support portion; 19. Pressing portion; 20. Side seat; 21. First through hole; 22. Second through hole; 23. Protruding portion; 24. Connecting hole; 25. Side limiting portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following further describes the workpiece of the present utility model in detail in conjunction with the embodiments and the drawings.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element; when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] As Figure 1 and Figure 2 shown, a super-small thermostat for automatic plug-in installation includes a plastic case 1 and a base plate 2, a bimetal 3, a moving reed 4, a contact 5 and an insulating seat assembly 6 installed in the plastic case 1. A first snap portion is provided on the inner side of the plastic case 1. One end of the base plate 2 is connected to the bimetal 3, and the other end of the base plate 2 is connected to the insulating seat assembly 6. Second snap portions are symmetrically provided on both sides of the insulating seat assembly 6, and the second snap portions are snap-connected to the first snap portion. One end of the moving reed 4 is connected to the bimetal 3, and the other end of the moving reed 4 is riveted to the contact 5. A first electrode 7 is provided at one end of the insulating seat assembly 6, and one end of the first electrode 7 extends outwards through the plastic case 1. A second electrode 8 is provided at one end of the base plate 2, and one end of the second electrode 8 extends outwards through the plastic case 1.

[0028] It should be noted that by increasing the lengths of the first electrode 7 and the second electrode 8, the first electrode 7 and the second electrode 8 can be directly inserted into the circuit board, avoiding the need for welding wires, and reducing the materials, equipment and labor costs required for the wire soldering process. At the same time, by providing the first snap portion and the second snap portion, a snap structure is used to fix the internal components and the plastic case 1, avoiding the use of spot glue fixation, and reducing the epoxy resin, equipment and labor costs required for the spot glue process. Therefore, this utility model reduces the material cost, labor cost and management cost, and at the same time reduces the manufacturing cycle of the product, so that the order delivery can be met more quickly.

[0029] As Figure 3 shown, the first snap portion includes a limiting groove 9, a first abutting end portion 10 and a second abutting end portion 11, and the limiting groove 9 is located between the first abutting end portion 10 and the second abutting end portion 11.

[0030] As Figure 2 and Figure 3 shown, the second snap portion includes a protruding snap limiting portion 12, a third abutting end portion 13 and a fourth abutting end portion 14. The snap limiting portion 12 is adapted to the limiting groove 9, the third abutting end portion 13 abuts against the first abutting end portion 10, and the fourth abutting end portion 14 abuts against the second abutting end portion 11.

[0031] As Figure 4As shown, the bottom plate 2 includes a fixing plate 15 and a supporting plate 16. Symmetric fixing seats 17 are provided on the fixing plate 15. One end of the bimetal sheet 3 and one end of the moving contact spring sheet 4 are both connected to the fixing seat 17, and a pulling tube hole is provided in the fixing seat 17.

[0032] As Figure 4 shown, a supporting portion 18 is provided on the upper end surface of the supporting plate 16. The supporting portion 18 is in movable contact with the bimetal sheet 3. Tightening portions 19 and side seats 20 are symmetrically provided on the supporting plate 16 respectively. The tightening portion 19 is located near the supporting portion 18, and the side seat 20 is located near the insulating seat assembly 6.

[0033] It should be noted that the tightening portion 19 and the side seat 20 strengthen the connection between the bottom plate 2 and the rubber shell 1.

[0034] As Figure 4 and Figure 5 shown, a first perforation 21 is provided at one end of the bimetal sheet 3. One end of the bimetal sheet 3 is riveted to the fixing seat 17 of the fixing plate 15 through the first perforation 21.

[0035] As Figure 4 and Figure 5 shown, a second perforation 22 is provided at one end of the moving contact spring sheet 4. One end of the moving contact spring sheet 4 is riveted to the fixing seat 17 through the second perforation 22. The other end of the moving contact spring sheet 4 is provided with a downward convex protrusion 23 and a connection hole 24. The protrusion 23 is movably connected to the other end of the bimetal sheet 3. The contact 5 is riveted to the moving contact spring sheet 4 through the connection hole 24. In the utility model, through the fixing seat 17 on the bottom plate 2, the bottom plate 2, the bimetal sheet 3 and the moving contact spring sheet 4 are firmly riveted together, and the stability is good.

[0036] It should be noted that in the utility model, the internal heat-sensitive component - the bimetal sheet 3 is used to sense the temperature change. When the temperature rises, the bimetal sheet 3 will deform, affecting the state of the moving contact spring sheet 4, and further affecting the contact state between the contact 5 and the insulating seat assembly 6. When the temperature rises to a certain degree, the bimetal sheet 3 will act due to the deformation of two metals with different thermal expansion coefficients, causing the moving contact spring sheet 4 to drive the contact 5 to move, so that the contact 5 is separated from the insulating seat assembly 6, thus disconnecting the circuit. As the temperature drops, the bimetal sheet 3 returns to its original state, and the contact 5 riveted on the moving contact spring sheet 4 will contact the insulating seat assembly 6 again to connect the circuit. This principle of controlling the on-off of the circuit through temperature change enables the thermostat to adjust the operating state of the device according to the ambient temperature, such as starting or stopping heating, refrigeration, etc. operations, so as to achieve the purpose of controlling the temperature.

[0037] As Figure 4 and Figure 5As shown, the lower end surface of the insulating seat assembly 6 is connected to the support plate 16. Side limiting portions 25 are further provided on both sides of the insulating seat assembly 6, and the side limiting portions 25 are in an "L" shape. The side limiting portions 25 cooperate with the side seats 20 of the support plate 16 to limit the position of the insulating seat assembly 6 on the support plate 16.

[0038] As Figure 1 shown, the material of the plastic housing 1 can be any one of PBT material, ABS plastic material, plastic material, silicone material or PVC material.

[0039] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention; any ordinary technician in the industry can smoothly implement the present invention as shown in the accompanying drawings of the specification and as described above; however, any slight changes, modifications and equivalent changes made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essence of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A super-small thermostat for automatic plug-in installation, characterized in that: It includes a plastic case (1), a base plate (2), a bimetal sheet (3), a moving reed (4), a contact (5) and an insulating seat assembly (6) installed inside the plastic case (1). A first snap portion is provided on the inner side of the plastic case (1). One end of the base plate (2) is connected to the bimetal sheet (3), and the other end of the base plate (2) is connected to the insulating seat assembly (6). Second snap portions are symmetrically provided on both sides of the insulating seat assembly (6), and the second snap portions are snap-connected to the first snap portion. One end of the moving reed (4) is connected to the bimetal sheet (3), and the other end of the moving reed (4) is riveted to the contact (5). One end of the insulating seat assembly (6) is provided with a first electrode (7), and one end of the first electrode (7) extends outwards through the plastic case (1). One end of the base plate (2) is provided with a second electrode (8), and one end of the second electrode (8) extends outwards through the plastic case (1).

2. The ultra-small thermostat installed by automatic plug-in according to claim 1, characterized in that: The first snap portion includes a limit groove (9), a first abutting end portion (10) and a second abutting end portion (11), and the limit groove (9) is located between the first abutting end portion (10) and the second abutting end portion (11).

3. The ultra-small thermostat with automatic plug-in installation according to claim 2, characterized in that: The second snap portion includes a protruding snap limit portion (12), a third abutting end portion (13) and a fourth abutting end portion (14). The snap limit portion (12) is adapted to the limit groove (9), the third abutting end portion (13) abuts against the first abutting end portion (10), and the fourth abutting end portion (14) abuts against the second abutting end portion (11).

4. The ultra-small thermostat installed by automatic plug-in according to claim 3, characterized in that: The base plate (2) includes a fixing plate (15) and a supporting plate (16). Fixing seats (17) are symmetrically provided on the fixing plate (15). One end of the bimetal sheet (3) and one end of the moving reed (4) are both connected to the fixing seat (17), and a pull tube hole is provided in the fixing seat (17).

5. The ultra-small thermostat installed by automatic plug-in according to claim 4, characterized in that: A supporting portion (18) is provided on the upper end surface of the supporting plate (16), and the supporting portion (18) is in movable contact with the bimetal sheet (3). Tightening portions (19) and side seats (20) are also symmetrically provided on the supporting plate (16). The tightening portions (19) are located near the supporting portion (18), and the side seats (20) are located near the insulating seat assembly (6).

6. The ultra-small thermostat installed by automatic plug-in according to claim 5, characterized in that: One end of the bimetal sheet (3) is provided with a first through hole (21), and one end of the bimetal sheet (3) is riveted to the fixing seat (17) of the fixing plate (15) through the first through hole (21).

7. The ultra-small thermostat installed by automatic plug-in according to claim 6, characterized in that: One end of the moving reed (4) is provided with a second through hole (22), and one end of the moving reed (4) is riveted to the fixing seat (17) through the second through hole (22). The other end of the moving reed (4) is provided with a downward convex protruding portion (23) and a connecting hole (24). The protruding portion (23) is movably connected to the other end of the bimetal sheet (3), and the contact (5) is riveted to the moving reed (4) through the connecting hole (24).

8. The ultra-small thermostat installed by automatic plug-in according to claim 7, characterized in that: The lower end surface of the insulating seat assembly (6) is connected to the supporting plate (16), and side limit portions (25) are also provided on both sides of the insulating seat assembly (6).

9. The ultra-small thermostat installed by automatic plug-in according to claim 1, characterized in that: The material of the plastic shell (1) is any one of PBT material, ABS plastic material, plastic material, silica gel material or PVC material.

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