A base structure for an electrical connector with overheat protection

Abstract

This utility model relates to a base structure for an electrical connector with overheat protection, including a housing and a cover. The housing has a thermal protector nesting cavity, and the front and rear ends of the housing have connection limiting nesting cavities. The thermal protector nesting cavity also has a power-off movable cavity, so that the thermal protector nesting cavity, the power-off movable cavity, and the two connection limiting nesting cavities together form an open composite chamber. The cover is configured to cover the open composite chamber. By setting up an open composite chamber, this utility model allows the thermal protector used in the open composite chamber to sense the heating and cooling of the circuit immediately, and quickly perform a power-off action and a reset power-on action, thereby ensuring the reliability of the thermal protector's operation and eliminating safety hazards.

Description

Technical Field

[0001] This utility model relates to the field of thermal protector technology, and in particular to a base structure for an electrical connector with overheat protection. Background Technology

[0002] Currently, thermal protectors are often built into an insulating shell, and electrical plugs or crimp terminals are fixedly connected to one or two terminals of the thermal protector to make it into an overheat protection plug or an overheat protection connector used in electrical equipment. This provides overload and overheat protection for the equipment, ensuring that the equipment will not be powered on under abnormal conditions, thereby avoiding equipment damage or safety accidents.

[0003] For example, the applicant filed a patent application with the Patent Office of the State Intellectual Property Office of China on March 8, 2023, with patent application number 202320417761.1 entitled "A Double-Insurance Safety Plug Device". The insulating shell of the device mainly includes an upper shell and a lower shell that are mounted together. The lower shell is provided with an embedding groove for mounting a thermal protector, and the upper shell is provided with a fastening groove for fastening the thermal protector. The thermal protector is completely covered and sealed by the closed limiting chamber formed by the embedding groove and the fastening groove together, which plays a limiting role and prevents the thermal protector from loosening, shaking or collision damage during installation. However, in practical applications, the insulating shell of this solution still has the following shortcomings: Such a closed limiting chamber will affect the temperature sensing of the thermal protector. When the circuit overheats abnormally, the heat can only be slowly conducted to the terminals of the thermal protector through the electrical plug or wires. This can result in a situation where the circuit is already severely overheated, but the thermal protector has not yet started to cut off the power. This prolongs the response time of the thermal protector's power-off action and poses a safety hazard. At the same time, when people manually unplug the electrical plug and need the thermal protector to reset and be powered on, the heat in the closed limiting chamber is difficult to dissipate quickly, causing the thermal protector to remain in the power-off action. This leads to a prolongation of the time for the thermal protector to reset and be powered on, and the reliability of its use is still relatively poor.

[0004] Therefore, based on the aforementioned shortcomings, the applicant believes that further improvements and redevelopment of this insulating shell are necessary to better meet people's application needs. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned problems and deficiencies and provide a base structure for an electrical connector with overheat protection. This base structure, by setting an open composite chamber, enables the thermal protector applied in the open composite chamber to sense the heating and cooling of the circuit in the first time, and quickly perform power-off and power-on actions to ensure the reliability of the thermal protector and eliminate safety hazards.

[0006] The technical solution of this utility model is implemented as follows: a base structure for an overheat protection electrical connector includes a housing and a cover assembled together. The housing is provided with a thermal protector nesting cavity. The characteristic is that the front and rear ends of the housing are respectively provided with a connecting element limiting nesting cavity that is interconnected with the thermal protector nesting cavity. A power-off movable cavity is also provided on one cavity wall of the thermal protector nesting cavity, so that the thermal protector nesting cavity, the power-off movable cavity and the two connecting element limiting nesting cavities together constitute an open composite chamber. The cover is provided to cover the open composite chamber.

[0007] Preferably, a PTC chip nesting cavity is also provided on another cavity wall of the thermal protector nesting cavity.

[0008] Preferably, the cavity wall of the PTC chip nesting cavity is further provided with an elastic clamping member nesting cavity, and the elastic clamping member nesting cavity, the PTC chip nesting cavity, the thermal protector nesting cavity, and the power-off movable cavity are arranged horizontally in sequence.

[0009] Preferably, the bottom of the PTC chip nested cavity, the bottom of the elastic clamping member nested cavity, and the cover shell are respectively provided with limiting protrusions.

[0010] Preferably, one of the electrical connector limiting nested cavities and the thermal protector nested cavity are arranged laterally through each other; the other electrical connector limiting nested cavity and the thermal protector nested cavity are arranged longitudinally through each other.

[0011] Preferably, the two electrical connection limiting nested cavities and the cover shell are respectively provided with electrical connection limiting protrusions or electrical connection limiting grooves.

[0012] Preferably, a rivet limiting and stress-relieving cavity is also provided at the intersection of the electrical connection limiting nest cavity and the thermal protector nest cavity.

[0013] Preferably, a positioning post and a positioning groove are provided between the cover and the shell, which are nested together.

[0014] Preferably, the cover and the outer shell are further provided with reinforcing convex edges and reinforcing grooves that are nested together.

[0015] Preferably, the number of open composite chambers is two, and the two open composite chambers are arranged symmetrically from left to right.

[0016] The beneficial effects of this invention are as follows: By setting up an open composite chamber, when the circuit overheats abnormally, the heat received by the electrical plugs or terminals can quickly fill the entire open composite chamber, which is very conducive to the introduction and dissipation of heat. This allows the thermal protector to sense the heating and cooling of the circuit immediately and quickly perform the power-off and reset actions, ensuring the reliability of the thermal protector and eliminating safety hazards. Furthermore, by setting up a nested chamber for the thermal protector and two nested chambers for limiting the electrical components, this invention can limit the thermal protector and the two electrical components respectively during application, preventing loosening and impact. At the same time, by setting up a power-off movable cavity, more space is created for hot air to circulate, which is more conducive to the introduction and dissipation of heat. Moreover, when using a conventional thermal protector without a protective casing, it also provides sufficient space for the thermal protector to complete the power-off and reset actions, ensuring the normal operation of the thermal protector. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the shell in this utility model.

[0020] Figure 4 This is a schematic diagram of the shell structure in the present invention from a top view.

[0021] Figure 5 This is a three-dimensional structural diagram of the present invention in use.

[0022] Figure 6 This is a schematic diagram of the disassembled structure of the present invention in use.

[0023] Figure 7 This is a top view of the shell in use in this utility model. Detailed Implementation

[0024] like Figure 1 and Figure 2As shown, the base structure of the electrical connector with overheat protection according to this utility model includes a housing 1 and a cover 2 assembled together. The housing 1 is provided with a thermal protector nesting cavity 11. To achieve the purpose proposed by this utility model, the front and rear ends of the housing 1 are respectively provided with a connecting member limiting nesting cavity 12 that is connected to the thermal protector nesting cavity 11. A power-off movable cavity 13 is also provided on one cavity wall of the thermal protector nesting cavity 11, so that the thermal protector nesting cavity 11, the power-off movable cavity 13 and the two connecting member limiting nesting cavities 12 together constitute an open composite chamber 100. The cover 2 is provided to cover the open composite chamber 100. By setting the open composite chamber 100, this utility model enables the thermal protector applied in the open composite chamber 100 to sense the heating and cooling of the circuit in time, and quickly perform a power-off action and a reset power-on action, so as to ensure the reliability of the thermal protector operation and eliminate safety hazards.

[0025] In order to reduce the processing difficulty of the thermal protector nesting cavity 11, improve the compatibility for installation of various thermal protectors, and facilitate the introduction and export of heat, the size of the thermal protector nesting cavity 11 can be increased. Then, the limiting function of the connecting component in the nesting cavity 12 is used to limit the connecting component, and the purpose of limiting the thermal protector can also be achieved by using the existing fixed connection design between the connecting component and the thermal protector.

[0026] In order to be compatible with more different types of thermal protectors, such as Figure 2 As shown, a PTC chip nesting cavity 14 is also provided on another cavity wall of the thermal protector nesting cavity 11. This allows the PTC chip of the external PTC thermal protector to be installed and used independently, thus broadening its application range. Furthermore, by having the PTC chip nesting cavity 14 located on the cavity wall of the thermal protector nesting cavity 11, the PTC chip nesting cavity 14 is also connected to the open composite chamber 100. When the thermal protector disconnects the circuit, the PTC chip heats up, filling the entire open composite chamber 100 with heat, thereby keeping the thermal protector in a de-energized state. Only when the power plug is manually unplugged does the PTC chip de-energize and cool down, causing the thermal protector to reset and re-energize, allowing the device to be plugged in again and put into operation.

[0027] When an external PTC thermal protector needs to prevent its PTC chip from detaching from the protector's terminals, a spring-loaded clamping element is often added to ensure that the PTC chip and the protector's terminals always maintain a tight contact. When using this type of external PTC thermal protector, such as... Figure 4As shown, the PTC chip nested cavity 14 also has an elastic clamping member nested cavity 15 on its cavity wall, and the elastic clamping member nested cavity 15, the PTC chip nested cavity 14, the thermal protector nested cavity 11, and the power-off movable cavity 13 are arranged horizontally in sequence. This horizontal arrangement design corresponds to the working direction of the elastic clamping member and the external PTC thermal protector. Furthermore, adding these structural designs will not affect the installation of conventional thermal protectors, and it also expands the space of the open composite chamber 100, which is more conducive to the introduction and removal of heat.

[0028] like Figure 2 and Figure 3 As shown, the bottom of the PTC chip nesting cavity 14, the bottom of the elastic clamping member nesting cavity 15, and the cover shell 2 are respectively provided with limiting protrusions 105. In application, this can limit the upper and lower ends of the PTC chip and the elastic clamping member installed in the base structure, so that the PTC chip and the elastic clamping member can only move towards the thermal protector nesting cavity 11, thereby improving the structural reliability of the base structure.

[0029] like Figure 4 As shown, one of the connecting component limiting nested cavities 12 and the thermal protector nested cavity 11 are arranged laterally through each other; the other connecting component limiting nested cavity 12 and the thermal protector nested cavity 11 are arranged longitudinally through each other. The longitudinal through-hole design improves the ease of assembling the thermal protector and connecting component into the base structure. The lateral through-hole design connects the connecting component limiting nested cavity 12 and the thermal protector nested cavity 11 into a Z-shaped structure, which limits the thermal protector and connecting component fixed together. This prevents the thermal protector and connecting component from being pulled out during insertion, removal, or pulling, ensuring the stability of the installation.

[0030] To further prevent the electrical connector installed in the limiting nest cavity 12 from becoming loose, such as Figure 2 and Figure 3 As shown, the two electrical connector limiting nested cavities 12 and the cover shell 2 are respectively provided with electrical connector limiting protrusions 122 or electrical connector limiting grooves 121. When the electrical connector is provided with an electrical connector limiting protrusion 122, the electrical connector limiting nested cavity 12 or the cover shell 2 is provided with an electrical connector limiting groove 121. Of course, the electrical connector limiting protrusion 122 and the electrical connector limiting groove 121 can also be interchanged, and can still play a limiting role.

[0031] like Figure 4 and Figure 7As shown, a rivet-limiting and stress-relieving cavity 16 is also provided at the intersection of the connector limiting nesting cavity 12 and the thermal protector nesting cavity 11. When the connector and the thermal protector's terminals are fixed together by rivets, the rivet-limiting and stress-relieving cavity 16 can accommodate the rivets. Furthermore, when the overheat protection connector is plugged in or pulled, the pulling force can be relieved through the rivets and the rivet-limiting and stress-relieving cavity 16, thus dispersing the pulling force and preventing it from concentrating on the connector and the thermal protector's terminals, preventing them from becoming loose.

[0032] In order to allow the cover 2 and the housing 1 to be quickly positioned together, such as Figure 2 As shown, a positioning post 101 and a positioning groove 102 are nested together between the cover shell 2 and the shell 1. When the shell 1 is provided with a positioning post 101, the cover shell 2 is provided with a positioning groove 102. Of course, the positioning post 101 and the positioning groove 102 can also be interchanged to achieve the same positioning function. In practical applications, the number of positioning posts 101 and positioning grooves 102 can be multiple to enhance their positioning effect.

[0033] To enhance the structural strength of the cover 2 and the four edges of the shell 1, such as Figure 2 As shown, the cover 2 and the housing 1 are further provided with nested reinforcing protrusions 103 and reinforcing grooves 104. This prevents the edges of the cover 2 and the housing 1 from bending or warping, resulting in a tighter and more secure fit, preventing the internal thermal protector from being exposed, and making it safer and more reliable to use. When the housing 1 is provided with reinforcing protrusions 103, the cover 2 is provided with reinforcing grooves 104. Of course, the reinforcing protrusions 103 and reinforcing grooves 104 can also be interchanged to achieve the same effect of strengthening the structural strength.

[0034] like Figure 4 As shown, there are two open composite chambers 100, and the two open composite chambers 100 are arranged symmetrically from left to right. This allows for the separate installation and use of thermal protectors connected to the neutral wire and the live wire, resulting in higher integration and greater ease of use.

[0035] like Figures 5 to 7 As shown, in practical applications, this base structure can be paired with a thermal protector 10 with live pins 20 and crimp terminals 30 to create an overheat-protected electrical plug. Simultaneously, this base structure can also be paired with a thermal protector 10 with two crimp terminals 30 to create an overheat-protected electrical connector for use in series in the wiring from the electrical plug to the electrical equipment.

[0036] In practical applications, the cover shell 2 can also be provided with an open composite chamber 100, and the open composite chamber 100 of the cover shell 2 is provided in a corresponding manner to the open composite chamber 100 of the shell 1. This allows the cover shell 2 and the shell 1 to be manufactured in a semi-separated manner.

Claims

1. A base structure for an electrical connector with overheat protection, comprising a housing (1) and a cover (2) assembled together, wherein the housing (1) is provided with a thermal protector nesting cavity (11), characterized in that: The front and rear ends of the housing (1) are respectively provided with electrical connection limiting nesting cavities (12) that are connected to the thermal protector nesting cavity (11). A power-off movable cavity (13) is also provided on one cavity wall of the thermal protector nesting cavity (11), so that the thermal protector nesting cavity (11), the power-off movable cavity (13) and the two electrical connection limiting nesting cavities (12) together constitute an open composite chamber (100). The cover (2) is provided to cover the open composite chamber (100).

2. The base structure of the electrical connector with overheat protection according to claim 1, characterized in that: The thermal protector nesting cavity (11) is further provided with a PTC chip nesting cavity (14) on another cavity wall.

3. The base structure of the overheat-protected electrical connector according to claim 2, characterized in that: The PTC chip nesting cavity (14) is also provided with an elastic clamping member nesting cavity (15) on its cavity wall, and the elastic clamping member nesting cavity (15), the PTC chip nesting cavity (14), the thermal protector nesting cavity (11), and the power-off movable cavity (13) are arranged in a horizontal order.

4. The base structure of the electrical connector with overheat protection according to claim 3, characterized in that: The bottom of the PTC chip nesting cavity (14), the bottom of the elastic clamping member nesting cavity (15), and the cover shell (2) are respectively provided with limiting bosses (105).

5. The base structure of the electrical connector with overheat protection according to claim 1, characterized in that: One of the electrical connection limiting nested cavities (12) and the thermal protector nested cavity (11) are arranged in a transverse manner; the other electrical connection limiting nested cavity (12) and the thermal protector nested cavity (11) are arranged in a longitudinal manner.

6. The base structure of the overheat-protected electrical connector according to claim 1, characterized in that: The two electrical connector limiting nested cavities (12) and the cover shell (2) are respectively provided with electrical connector limiting protrusions (122) or electrical connector limiting grooves (121).

7. The base structure of the overheat-protected electrical connector according to claim 1, characterized in that: At the junction of the electrical connection limiting nested cavity (12) and the thermal protector nested cavity (11), a rivet limiting and unloading cavity (16) is also provided.

8. The base structure of the overheat-protected electrical connector according to claim 1, characterized in that: The cover (2) and the shell (1) are also provided with a positioning post (101) and a positioning groove (102) nested together.

9. The base structure of the overheat-protected electrical connector according to claim 1, characterized in that: The cover (2) and the shell (1) are further provided with a reinforcing convex edge (103) and a reinforcing groove (104) nested together.

10. The base structure of the electrical connector with overheat protection according to claim 1, characterized in that: The number of open composite chambers (100) is two, and the two open composite chambers (100) are arranged symmetrically on the left and right.

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