Plug module with thermal protector

Abstract

The utility model relates to the technical field of plugs, in particular to a plug module with a thermal protector, which is characterized by comprising a base with pin pieces, a cover plate covered on the base and the thermal protector, the thermal protector is arranged on the base in a lying manner by taking the length of the thermal protector as the direction, and the thermal protector is arranged on the base. The left end and the right end of the thermal protector are respectively provided with a first wiring end and a second wiring end which are arranged vertical to the thermal protector, the upper ends of the first wiring end and the second wiring end are respectively arranged in a manner of vertically and upwards penetrating out of the cover plate, and the first wiring end is fixedly connected with the pin sheet in a tight fit manner. According to the utility model, the quality of plug products can be greatly improved, and disputes between plug manufacturers and thermal protector manufacturers can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of plug technology, and in particular to a plug module with a thermal protector. Background Technology

[0002] Power plugs are widely used in the production of electrical products. Installing a thermal protector on the plug can effectively prevent safety hazards caused by poor contact between the plug and socket or excessive load. Currently, plug manufacturers purchase thermal protectors from thermal protector manufacturers to produce plugs with thermal protectors. Workers then assemble the thermal protectors onto the base of the existing plug using welding or screws, as disclosed in Chinese utility model patent application number 200620105999.7, entitled "Current Overload Protection Plug". The current production technology has the following technical problems: First, because the bimetallic strip and moving contact in the thermal protector are thin and small metal pieces, like a fingernail, workers can easily touch them during assembly due to factors such as their skill level, sense of responsibility, or personal emotions. This can cause deformation, resulting in poor contact between the moving and stationary contacts, which in turn prevents the thermal protector from functioning properly and produces a large number of defective products. Furthermore, it is difficult to determine whether the defect is due to a problem with the thermal protector itself or a problem with the worker's operation. Plug manufacturers and thermal protector manufacturers often shift responsibility, leading to disputes between them. Second, because a thermal protector is added to an existing plug, the plug housing needs to be made larger to accommodate the thermal protector. Therefore, this type of plug is bulky and unsuitable for use in confined spaces.

[0003] Given the aforementioned technical problems in the existing technology, the applicant believes it is essential to make technical improvements to provide plug manufacturers with a plug module equipped with a thermal protector to ensure the quality of plug products. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned problems and shortcomings, and to provide manufacturers of plugs with thermal protectors with a plug module that reduces the defect rate of plug products, reduces disputes between plug manufacturers and thermal protector manufacturers, and makes the plug products smaller in size, suitable for use in relatively narrow spaces.

[0005] The technical solution of this utility model is implemented as follows: a plug module with a thermal protector, characterized in that: it includes a base with prongs, a cover plate placed on the base, and a thermal protector. The thermal protector is laid flat on the base with its length as the orientation. A first terminal and a second terminal are respectively installed on the left and right ends of the thermal protector, which are perpendicular to the thermal protector. The upper ends of the first terminal and the second terminal are respectively vertically extended through the cover plate, and the first terminal is tightly fitted and fixedly connected to the prongs.

[0006] Furthermore, the base is provided with an mounting groove for the heating protector to be installed flat. The pin is inserted and fixed in the base. The lower end of the pin extends out of the bottom surface of the base, and the upper end of the pin extends into the mounting groove and is tightly fitted and fixed to the first terminal.

[0007] Furthermore, the left and right ends of the thermal protector are respectively provided with a first rivet and a second rivet, and the first rivet and the second rivet respectively rivet the first terminal and the second terminal to the bottom surface of the thermal protector.

[0008] Furthermore, the upper end of the pin is provided with a fitting and fixing part, and a rivet clearance hole is also provided on the fitting and fixing part.

[0009] Furthermore, the groove wall of the mounting groove is also provided with a rivet clearance groove, which has a shape structure with a larger upper end and a smaller lower end.

[0010] Furthermore, the base has two mounting slots arranged side by side, and each mounting slot contains a thermal protector.

[0011] Furthermore, the top surface of the cover plate is provided with a concealed slot for the first terminal to pass through and be accommodated by the top end of the fitting and fixing part; a recessed step is also provided on the top surface of the cover plate on the other side of the concealed slot, and a cavity with a perforation is also provided on the recessed step.

[0012] Furthermore, the base is provided with multiple mounting holes; the cover plate is provided with multiple mounting protrusions accordingly.

[0013] Furthermore, the base has multiple fastening grooves around its perimeter, and the cover plate has multiple fastening protrusions around its perimeter.

[0014] The beneficial effects of this utility model are:

[0015] Firstly, this utility model provides plug manufacturers with a plug module equipped with a thermal protector. The thermal protector, prongs, base, and cover are integrated into a single plug module. The thermal protector is completely sealed within the enclosed space formed by the base and cover. When the plug module of this application is used to produce plug products, the plug manufacturer only needs to connect the power cord to the second terminal of the thermal protector and then injection mold an insulating base conforming to national standards onto the outside of the plug module. This completely prevents workers from touching the bimetallic strip or moving contact, thus avoiding the chance of defective products caused by deformation of the bimetallic strip or moving contact due to worker's personal factors. As long as the thermal protector manufacturer provides a qualified plug module, the quality of the plug products can be guaranteed. Even if defective products occur, the cause can be clearly identified, effectively avoiding the mutual shirking of responsibility between the plug manufacturer and the thermal protector manufacturer, thereby reducing disputes between the two.

[0016] Secondly, the thermal protector is laid flat on the base along its length, which makes the space occupied by the thermal protector in the height direction of the plug module very small, thereby greatly reducing the height of the plug module; and the upper ends of the first terminal and the second terminal extend vertically upward through the cover plate, which can further reduce the height between the cover plate and the base, making the assembly structure between the cover plate, the thermal protector and the base more compact. This makes the plug product produced using this utility model very small in height, which is very suitable for use in very narrow spaces.

[0017] In addition, when producing plug products, plug manufacturers only need to connect the power cord to the plug module and then injection mold the insulating base. This can greatly simplify the production process for plug manufacturers, thereby improving the production efficiency of plug products. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a three-dimensional exploded structural diagram of the present invention.

[0020] Figure 3 This is a schematic diagram of the pin plate in this utility model.

[0021] Figure 4 This is a three-dimensional exploded view of the thermal protector in this utility model.

[0022] Figure 5 This is a bottom view of the cover plate in this utility model.

[0023] Figure 6 This is a schematic diagram of the assembly structure of the thermal protector and the base in this utility model. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] like Figure 1 , 2 As shown in Figure 6, this utility model provides a plug module with a thermal protector. To achieve the purpose proposed by this utility model, it includes a base 1 with pins 4, a cover plate 2 placed on the base 1, and a thermal protector 3. The thermal protector 3 is laid flat on the base 1 along its length. A first terminal 31 and a second terminal 32, perpendicular to the thermal protector 3, are respectively installed at the left and right ends of the thermal protector 3. The upper ends of the first terminal 31 and the second terminal 32 extend vertically upward through the cover plate 2, and the first terminal 31 is tightly fitted and fixedly connected to the pins 4. In this way, the thermal protector 3, the pins 4, the base 1, and the cover plate 2 are integrated into a single module. The thermal protector 3 is completely sealed in the airtight space formed by the base 1 and the cover plate 2, and is fixedly connected to the pins 4. When using the plug module of this utility model to produce plug products, it is only necessary to connect the power cord to the second terminal 32 of the thermal protector, and then injection mold an insulating base for the plug onto the outside of the plug module. This not only completely prevents workers from touching the thermal protector, thus effectively ensuring the quality of the plug products, but also greatly simplifies the processing technology of the plug products, thereby improving product production efficiency; since the quality of the plug products can be effectively guaranteed, disputes between plug manufacturers and thermal protector manufacturers can also be avoided.

[0026] like Figure 2 , 6As shown, the base 1 has an mounting groove 13 for the thermal protector 3 to be installed horizontally. The pin 4 is inserted and fixed in the base 1, with its lower end extending beyond the bottom surface of the base 1 and its upper end extending into the mounting groove 13 and tightly fitted and fixed to the first terminal 31. By installing the thermal protector 3 horizontally in the mounting groove 13, the groove forms a protective enclosure around the thermal protector 3, effectively resisting damage from external impacts. Even if bumped or dropped, the internal components of the thermal protector 3 will not shift, thus greatly improving the product's stability. In actual production, the pin 4 and the base 1 are first integrally injection molded, and the upper end of the pin 4 is inserted into the mounting groove 13. After the thermal protector 3 is installed in the mounting groove 13, the limiting effect of the groove wall of the mounting groove 13 makes the upper end of the pin 4 fit tightly and fix it to the first terminal 31. In this way, the pin 4 and the first terminal 31 can be tightly fitted and fixed without riveting or welding, realizing the fixation and electrical connection between the pin 4 and the thermal protector 3. This not only simplifies the process, but also avoids the adverse effects on the thermal protector 3 caused by careless operation during welding or riveting, thus further improving the quality of the product.

[0027] like Figure 2 , 4 As shown, the thermal protector 3 has a first rivet 33 and a second rivet 34 at its left and right ends, respectively. The first rivet 33 and the second rivet 34 rivet the first terminal 31 and the second terminal 32 to the bottom surface of the thermal protector 3. The first rivet 33 and the second rivet 34 are made of metal, so they not only serve a locking function but also an electrical connection function, thereby simplifying the structure of the thermal protector 3 and reducing the difficulty of processing.

[0028] like Figure 2 , 3 As shown in Figure 6, the upper end of the pin 4 is provided with a fitting and fixing part 42, and a rivet clearance hole 41 is also provided on the fitting and fixing part 42. In this way, when the thermal protector 3 is installed in the mounting groove 13, the end of the first rivet 33 is inserted into the rivet clearance hole 41, so that the fitting and fixing part 42 and the first terminal 31 can be tightly fitted together, and are tightly fitted and fixed under the limiting action of the mounting groove 13; at the same time, the rivet clearance hole 41 can limit the end of the first rivet 33 to increase the stability of the thermal protector 3 in the mounting groove 13.

[0029] like Figure 2As shown, the groove wall of the mounting groove 13 is also provided with a rivet clearance groove 131, which has a shape with a larger upper end and a smaller lower end. When the thermal protector 3 is installed in the mounting groove 13, the end of the second rivet 34 is inserted into the rivet clearance groove 131. The rivet clearance groove 131 limits the second rivet 34, further increasing the stability of the thermal protector 3 in the mounting groove 13. At the same time, it can also make the assembly structure between the thermal protector 3 and the base 1 more compact, thereby helping to reduce the volume of the base 1. The larger upper end and smaller lower end of the rivet clearance groove 131 can make the end of the second rivet 34 more smoothly inserted into the rivet clearance groove 131 when the thermal protector 3 is installed in the mounting groove 13, which helps to improve production efficiency.

[0030] like Figure 2 , 6 As shown, two mounting slots 13 are arranged side by side on the base 1, and a thermal protector 3 is installed in each of the two mounting slots 13. In this way, both the live wire pin and the neutral wire pin of the plug module are connected to the thermal protector 3, thereby providing dual protection and enhancing the thermal protection function of the plug module.

[0031] like Figure 1 , 2 As shown, the top surface of the cover plate 2 is also provided with a concealed slot 23 for the first terminal 31 to pass through and be accommodated by the top end of the fitting and fixing part 42; on the top surface of the cover plate 2 on the other side of the concealed slot 23, there is also a recessed step 24, and a cavity 25 with a perforation is provided on the recessed step 24, through which the upper end of the second terminal 32 passes. In this way, the design of the recessed step 24 can leave more than enough space for the wire to be connected at the upper end of the second terminal 32; after the plug module is assembled, epoxy resin is injected into the concealed slot 23 and the cavity 25, so that the entire plug module is a sealed whole. When the insulating base is formed by injection molding on the outside of the plug module, it can prevent the plastic liquid from seeping into the inside of the plug module and sticking to the thermal protector 3, thereby ensuring the quality of the plug module.

[0032] like Figure 2 , 5 As shown in Figure 6, the base 1 is provided with multiple mounting holes 11; the cover plate 2 is provided with multiple mounting protrusions 21 correspondingly. In this way, the base 1 and the cover plate 2 can be quickly assembled together by the mutual fitting between the mounting holes 11 and the mounting protrusions 21.

[0033] like Figure 2 , 5As shown in Figure 6, the base 1 has multiple fastening grooves 12 around its perimeter, and the cover plate 2 has multiple fastening protrusions 22 correspondingly around its perimeter. This interlocking between the fastening grooves 12 and the fastening protrusions 22 allows for rapid assembly of the base 1 and the cover plate 2 around their perimeters, further enhancing the strength and sealing of the connection between them.

[0034] like Figure 2 , 4 As shown, the thermal protector 3 is composed of a bimetallic strip 35, a movable contact 36, a movable contact 37 disposed on the bottom surface of the movable contact 36, a stationary contact 38 electrically connected to the movable contact 37, and a PTC base 39. The first rivet 33 rivets one end of the bimetallic strip 35, one end of the movable contact 36, one end of the PTC base 39, and the first terminal 31 together; the second rivet 34 rivets the other end of the PTC base 39 and the second terminal 32 together; the stationary contact 38 is disposed on the top surface of the second rivet 34; the bimetallic strip 35 is disposed on the top surface of the movable contact 36, and a shim 30 is also provided between the movable contact 36 and the PTC base 39. In this way, when a circuit failure occurs and the bimetallic strip 35 deforms at high temperature, causing the moving contact 36 to spring upward and separate the moving contact 37 from the stationary contact 38, the PTC base 39 can continuously generate heat to provide heat for the deformation of the bimetallic strip 35, thus maintaining its deformation action and keeping the moving contact 37 and stationary contact 38 separated until the power is manually cut off. This makes the circuit safer and can also effectively avoid material fatigue caused by repeated deformation of the bimetallic strip 35, greatly extending its service life. The PTC base 39 also serves as the base of the thermal protector 3, which helps to simplify the structure of the thermal protector 3, reduce its processing difficulty and size, and thus also helps to reduce the processing difficulty and size of the plug module product.

Claims

1. A plug module with thermal protector, characterized by: The utility model provides a heat protector, including the base (1) with the pin piece (4), the cover plate (2) of cover is placed on the base (1), heat protector (3), heat protector (3) is with its length is the horizontal setting of azimuth on the base (1), the left and right ends of heat protector (3) are installed respectively first wiring terminal (31) with second wiring terminal (32) set up perpendicular to heat protector (3), the upper end of first wiring terminal (31) and second wiring terminal (32) is respectively set up to the cover plate (2) with first wiring terminal (31) and pin piece (4) are closely fixed and connected.

2. The plug module with thermal protector of claim 1, wherein: The base (1) is provided with an embedding groove (13) for embedding the heat protector (3) horizontally, and the pin piece (4) is fixedly arranged in the base (1), the lower end of the pin piece (4) is arranged outside the bottom surface of the base (1), and the upper end of the pin piece (4) is arranged in the embedding groove (13) and fixedly connected with the first wiring terminal (31).

3. The plug module with thermal protector of claim 2, wherein: The left and right ends of the heat protector (3) are respectively provided with a first rivet (33) and a second rivet (34), the first rivet (33) and the second rivet (34) rivet the first wiring terminal (31) and the second wiring terminal (32) on the bottom surface of the heat protector (3) respectively.

4. The plug module with thermal protector of claim 2, wherein: The upper end of the pin piece (4) is provided with a close fixed part (42), and a rivet accommodating hole (41) is further arranged on the close fixed part (42).

5. The plug module with thermal protector of claim 2, wherein: The groove wall of the embedding groove (13) is further provided with a rivet accommodating groove (131), and the rivet accommodating groove (131) has a shape structure with a large upper end and a small lower part.

6. The plug module with thermal protector of claim 2, wherein: The base (1) is provided with two embedding grooves (13) arranged side by side, and one heat protector (3) is embedded in each of the two embedding grooves (13).

7. The plug module with thermal protector of claim 4, wherein: The top surface of the cover plate (2) is further provided with a hidden groove hole (23) for the first wiring terminal (31) and the top end of the close fixed part (42) to pass through and accommodate, a sunken step (24) is further arranged on the top surface of the cover plate (2) on the other side of the hidden groove hole (23), and a concave cavity (25) with a perforation is further arranged on the sunken step (24).

8. The plug module with thermal protector of claim 1, wherein: The base (1) is provided with a plurality of embedding holes (11), and the cover plate (2) is correspondingly provided with a plurality of embedding protruding columns (21).

9. The plug module with thermal protector of claim 1, wherein: The periphery of the base (1) is provided with a plurality of buckling grooves (12), and the periphery of the cover plate (2) is correspondingly provided with a plurality of buckling protruding strips (22).

10. The plug module with thermal protector of claim 3, wherein: The heat protector (3) is composed of a bimetallic strip (35), a movable contact piece (36), a movable contact point (37) arranged on the bottom surface of the movable contact piece (36), a static contact point (38) electrically connected with the movable contact point (37), and a PTC base (39), the first rivet (33) rivets one end of the bimetallic strip (35), one end of the movable contact piece (36), one end of the PTC base (39), and the first wiring terminal (31), the second rivet (34) rivets the other end of the PTC base (39) and the second wiring terminal (32), and the static contact point (38) is arranged on the top surface of the second rivet (34).

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