Protective structure of direct-current thermal protector

Abstract

The utility model discloses a protection structure of a direct current thermal protector, which relates to the technical field of thermal protectors and comprises a thermal protector body and a wire clamping and fixing structure. Two wires are welded to the surface of the thermal protector body, a bottom clamping plate is installed on the lower sides of the two wires, a top clamping plate is installed on the upper sides of the two wires, and a sliding groove is formed in the top clamping plate. The wire clamping and fixing structure comprises two sliding plates, two pulling plates, a reset spring, four fixing shafts and two connecting plates, the two sliding plates are slidably installed in the sliding groove, the two pulling plates are fixedly connected to the tops of the two sliding plates respectively, and two wires can be clamped, fixed and protected through a bottom clamping plate and a top clamping plate; when the two wires are pulled to be bent, the wires can be bent at the rearmost ends of the bottom clamping plate and the top clamping plate, at the moment, the wires cannot be bent at welding spots, and then the welding spots are prevented from being broken.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal protectors, and particularly relates to a protection structure of a DC thermal protector. Background Art

[0002] A thermal protector, namely a temperature controller, is a temperature controller using a bimetal sheet as a temperature sensing component. When an electrical appliance is working normally, the bimetal sheet is in a free state and the contact is in a closed / open state: when the temperature reaches the operating temperature, the bimetal sheet is heated to generate internal stress and acts quickly, opening / closing the contact to cut off / connect the circuit, thereby playing a role in temperature control: when the electrical appliance cools down to the reset temperature, the contact automatically closes / opens to restore the normal working state.

[0003] The currently disclosed patent: CN219832512U discloses a thermal protector with a protection structure. The thermal protector is connected through a connection socket, and the outside of the thermal protector is shielded and protected by a protection housing. The protection mechanism forms a closed protection structure outside the thermal protector, which can reduce the influence of the external environment on the thermal protector, improve the working stability and service life of the thermal protector, and an installation seat is arranged on the upper part of the protection housing, which can provide connection holes for the installation of the thermal protector through the installation seat, making the installation of the thermal protector more convenient.

[0004] Based on the above search, it is found that the above patent has the following problems in use: the outside of the thermal protector is shielded and protected by a protection housing, and the protection mechanism forms a closed protection structure outside the thermal protector, which can reduce the influence of the external environment on the thermal protector. However, the external wire of the thermal protector is connected to the internal contact piece through a solder joint. Therefore, when the external wire is pulled and bent during use, the pulling force will act on the solder joint, easily causing the solder joint to break and reducing the service life of the thermal protector. Summary of the Utility Model

[0005] An object of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a protection structure of a DC thermal protector, which can solve the problem that the external wire of the thermal protector is connected to the internal contact piece through a solder joint. Therefore, when the external wire is pulled and bent during use, the pulling force will act on the solder joint, easily causing the solder joint to break and reducing the service life of the thermal protector.

[0006] To achieve the above object, the present utility model provides the following technical solution: A protection structure for a DC thermal protector, comprising a thermal protector body and a wire clamping and fixing structure; two wires are welded on the surface of the thermal protector body, a bottom clamping plate is installed below the two wires, a top clamping plate is installed above the two wires, and a chute is opened inside the top clamping plate; The wire clamping and fixing structure includes two sliding plates, two pulling plates, a return spring, four fixing shafts and two connecting plates. The two sliding plates are both slidably installed inside the chute. The two pulling plates are respectively fixedly connected to the tops of the two sliding plates. The return spring is fixedly connected to the inner sides of the two sliding plates. The four fixing shafts are respectively fixedly connected to the opposite sides of the two sliding plates. The two connecting plates are both fixedly connected to the top of the bottom clamping plate.

[0007] Preferably, two semi-circular clamping grooves are opened on the surfaces of the bottom clamping plate and the top clamping plate.

[0008] Preferably, two arc-shaped clamping grooves are opened on the inner walls of the four semi-circular clamping grooves, and rubber pads are fixedly connected inside the two arc-shaped clamping grooves.

[0009] Preferably, the surface of the rubber pad is in contact with the surface of the wire.

[0010] Preferably, two through grooves are opened on the surface of the top clamping plate, and the two connecting plates are respectively slidably connected inside the two through grooves.

[0011] Preferably, two fixing holes are opened on the surfaces of the two connecting plates, and the four fixing shafts are respectively slidably clamped inside the four fixing holes.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] 1. For the protection structure of the DC thermal protector, the two wires can be clamped and fixed by the bottom clamping plate and the top clamping plate. When the two wires are pulled and bent, the wires will bend at the rearmost ends of the bottom clamping plate and the top clamping plate. At this time, the wires will not bend at the solder joints, so that the pulling force acts on the surface of the wires, thereby avoiding breakage at the solder joints and prolonging the service life of the thermal protector body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further illustrates the present utility model in conjunction with the drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the overall structure of a protection structure for a DC thermal protector of the present utility model;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the top clamping plate of the present utility model;

[0017] Figure 3Schematic diagram of the internal structure of the top clamping plate of the present utility model;

[0018] Figure 4 Schematic diagram of the surface structure of the bottom clamping plate of the present utility model;

[0019] Figure 5 Schematic diagram of the bottom structure of the top clamping plate of the present utility model.

[0020] Reference numerals: 1, thermal protector body; 2, wire; 3, bottom clamping plate; 4, top clamping plate; 5, semi-circular clamping groove; 6, arc-shaped clamping groove; 7, rubber pad; 8, chute; 9, sliding plate; 10, pulling plate; 11, return spring; 12, fixed shaft; 13, connecting plate; 14, fixed clamping hole; 15, through groove. Detailed implementation manners

[0021] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the present utility model.

[0023] In the description of the present utility model, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If the first and second are described only for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0024] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0025] Please refer to Figures 1-5, the present utility model provides a technical solution: a protection structure for a DC thermal protector, including a thermal protector body 1 and a wire clamping and fixing structure. Two wires 2 are welded on the surface of the thermal protector body 1. A bottom clamping plate 3 is installed below the two wires 2, and a top clamping plate 4 is installed above the two wires 2. A chute 8 is opened inside the top clamping plate 4.

[0026] The wire clamping and fixing structure includes two sliding plates 9, two pulling plates 10, a return spring 11, four fixed shafts 12 and two connecting plates 13. The two sliding plates 9 are both slidably installed inside the chute 8. The two pulling plates 10 are respectively fixedly connected to the tops of the two sliding plates 9. The return spring 11 is fixedly connected to the inner sides of the two sliding plates 9. The four fixed shafts 12 are respectively fixedly connected to the opposite sides of the two sliding plates 9. The two connecting plates 13 are both fixedly connected to the top of the bottom clamping plate 3. Two through slots 15 are opened on the surface of the top clamping plate 4. The two connecting plates 13 are respectively slidably connected inside the two through slots 15. Two fixed clamping holes 14 are opened on the surfaces of the two connecting plates 13. The four fixed shafts 12 are respectively slidably clamped inside the four fixed clamping holes 14.

[0027] When the protection structure of the DC thermal protector is in use, the staff first place the bottom clamping plate 3 below the two wires 2, and then place the top clamping plate 4 above the two wires 2. The staff relatively press the two pulling plates 10 with their fingers and make them slide relatively. The relative sliding of the two pulling plates 10 can drive the two sliding plates 9 to slide relatively and compress the return spring 11. At this time, the return spring 11 gives a reverse elastic force to the two sliding plates 9. The two sliding plates 9 slide relatively and drive the two fixed shafts 12 on the surface to slide and hide inside the top clamping plate 4. At this time, the staff press the top clamping plate 4 downward again and make the two connecting plates 13 slide into the two through slots 15. After the staff release the two pulling plates 10, the return spring 11 can release the elastic force and push the two sliding plates 9 to slide away from each other. The sliding of the two sliding plates 9 away from each other can drive the four fixed shafts 12 to slide and be clamped into the four fixed clamping holes 14. Then, the two connecting plates 13 can be fixedly installed inside the top clamping plate 4 through the four fixed shafts 12, and then the bottom clamping plate 3 can be fixedly installed below the top clamping plate 4. At this time, the two wires 2 can be clamped and fixed for protection by the bottom clamping plate 3 and the top clamping plate 4. When the two wires 2 are pulled and bent, the wires 2 will bend at the rearmost ends of the bottom clamping plate 3 and the top clamping plate 4. At this time, the wires 2 will not bend at the welding points, so that the pulling force acts on the surface of the wires 2, thus avoiding the disconnection at the welding points and prolonging the service life of the thermal protector body 1.

[0028] Both the surfaces of the bottom clamping plate 3 and the top clamping plate 4 are provided with two semi-circular clamping grooves 5. The inner walls of the four semi-circular clamping grooves 5 are both provided with two arc-shaped clamping grooves 6. Two rubber pads 7 are fixedly connected inside the two arc-shaped clamping grooves 6. The surface of the rubber pad 7 is in contact with the surface of the wire 2.

[0029] After the bottom clamping plate 3 and the top clamping plate 4 are fixedly installed on the surfaces of the two wires 2, both the bottom clamping plate 3 and the top clamping plate 4 will drive the rubber pads 7 on their surfaces to squeeze on the surfaces of the two wires 2. Thus, the friction between the bottom clamping plate 3 and the top clamping plate 4 and the two wires 2 is increased through the rubber pads 7, improving the stability of the fixed installation of the bottom clamping plate 3 and the top clamping plate 4 on the surfaces of the two wires 2 and preventing the bottom clamping plate 3 and the top clamping plate 4 from sliding on the surfaces of the two wires 2.

[0030] Working principle: For the protection structure of this DC thermal protector, the staff first place the bottom clamping plate 3 under the two wires 2, and then place the top clamping plate 4 above the two wires 2. The staff relatively press the two pull plates 10 with their fingers and make them slide relatively. The relative sliding of the two pull plates 10 can drive the two sliding plates 9 to slide relatively and squeeze the return spring 11. The relative sliding of the two sliding plates 9 drives the two fixed shafts 12 on their surfaces to slide and hide inside the top clamping plate 4. At this time, the staff press the top clamping plate 4 downward again, and make the two connecting plates 13 slide into the two through grooves 15. After the staff release the two pull plates 10, the return spring 11 can release its elastic force and push the two sliding plates 9 to slide away from each other. The sliding of the two sliding plates 9 away from each other can drive the four fixed shafts 12 to slide and snap into the four fixed clamping holes 14. The two wires 2 can be clamped and fixed for protection by the bottom clamping plate 3 and the top clamping plate 4. After the bottom clamping plate 3 and the top clamping plate 4 are fixedly installed on the surfaces of the two wires 2, they will both drive the rubber pads 7 on their surfaces to squeeze on the surfaces of the two wires 2, thereby increasing the friction between the bottom clamping plate 3 and the top clamping plate 4 and the two wires 2 through the rubber pads 7.

[0031] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A protective structure for a DC thermal protector, characterized in that, Including: The thermal protector body (1) and the wire clamping and fixing structure; Two wires (2) are welded on the surface of the thermal protector body (1). A bottom clamping plate (3) is installed on the lower side of the two wires (2), a top clamping plate (4) is installed on the upper side of the two wires (2), and a chute (8) is opened inside the top clamping plate (4); The wire clamping and fixing structure includes two sliding plates (9), two pulling plates (10), a return spring (11), four fixed shafts (12) and two connecting plates (13). The two sliding plates (9) are both slidably installed inside the chute (8). The two pulling plates (10) are respectively fixedly connected to the tops of the two sliding plates (9). The return spring (11) is fixedly connected to the inner sides of the two sliding plates (9). The four fixed shafts (12) are respectively fixedly connected to the opposite sides of the two sliding plates (9). The two connecting plates (13) are both fixedly connected to the top of the bottom clamping plate (3).

2. The protective structure of a DC thermal protector according to claim 1, wherein: Two semi-circular clamping grooves (5) are opened on the surfaces of the bottom clamping plate (3) and the top clamping plate (4).

3. The protection structure of a DC thermal protector according to claim 2, characterized in that: Two arc-shaped clamping grooves (6) are opened on the inner walls of the four semi-circular clamping grooves (5), and rubber pads (7) are fixedly connected inside the two arc-shaped clamping grooves (6).

4. The protective structure of a DC thermal protector according to claim 3, characterized in that: The surface of the rubber pad (7) is in contact with the surface of the wire (2).

5. The protective structure of a DC thermal protector according to claim 1, characterized in that: Two through grooves (15) are opened on the surface of the top clamping plate (4), and the two connecting plates (13) are respectively slidably connected inside the two through grooves (15).

6. The protective structure of a DC thermal protector according to claim 5, characterized in that: Two fixing holes (14) are opened on the surfaces of the two connecting plates (13), and the four fixed shafts (12) are respectively slidably clamped inside the four fixing holes (14).

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