Ceramic protector
By using a ceramic protector with a ceramic shell and brass pressure plate, combined with a bimetallic sheet structure, the safety hazards of the existing protectors in high temperature and electrical environments are solved, and circuit protection with high stability and durability is achieved.
Patent Information
- Application Number
- CN202422397980.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Existing protectors have strong electrical and thermal conductivity in high temperature or electrical environments, which can easily cause safety hazards, and the plastic shell is prone to aging or cracking in high temperature and corrosive environments, resulting in reduced durability and reliability.
The ceramic material is used as the shell, combined with a brass-based press plate and bimetallic sheet structure, to achieve reliable connection and disconnection between dynamic contacts and static contacts. The high insulation of ceramics and the wear resistance of brass are used to enhance the connection strength and reliability, and to achieve rapid protection through the temperature response of bimetallic sheets.
Improve the stability and safety of the protector in high temperature and electrical environments, reduce poor contact, extend service life, and enhance durability and reliability.
Smart Images
Figure CN223155938U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of protectors, in particular to a ceramic protector. Background Art
[0002] A protector is a safety device for electrical equipment and circuits. Its main function is to cut off the circuit in time when overload, short circuit or other faults occur, so as to prevent equipment damage or safety accidents such as fires. Protectors are widely used in industrial production, construction projects and household appliances and other fields, and ensure the safety of equipment and personnel by providing functions such as overcurrent protection, overvoltage protection and leakage protection.
[0003] In the prior art, the protector housing is mainly made of metal or plastic materials. The metal housing of the protector has good strength and durability, and can resist external impact and mechanical damage to a certain extent. The plastic housing of the protector is favored for its excellent insulation performance and lightness.
[0004] However, the inventor found in the actual use process that protectors made of metal or plastic materials have certain limitations in some special working environments. For example, although the metal housing has high strength, its electrical conductivity and thermal conductivity are relatively strong, and it is easy to cause safety hazards such as electric shock and high-temperature damage in high-temperature or electrical environments. The plastic housing is prone to aging or cracking in high-temperature, corrosive or outdoor harsh environments, resulting in a significant reduction in its durability and reliability. Therefore, in these specific environments, there is an urgent need for a new type of protector that can overcome the defects of existing materials while maintaining excellent performance, so as to adapt to a wider range of application scenarios and provide higher safety. Summary of the Utility Model
[0005] In view of at least one of the above technical problems, the utility model provides a ceramic protector, which adopts an improved support structure to achieve active yielding.
[0006] According to a first aspect of the utility model, there is provided a ceramic protector, comprising:
[0007] A housing having an opening at one end and a receiving chamber inside;
[0008] An insulating seat disposed inside the receiving chamber;
[0009] A static contact mechanism fixedly connected to one side of the insulating seat, including a static contact piece, a static contact pin disposed at one end of the static contact piece, and a static contact point disposed at the other end of the static contact piece;
[0010] A moving contact mechanism fixed to the other side of the insulating seat, including a moving contact assembly, a moving contact pin disposed at one end of the moving contact assembly, and a moving contact point disposed on the moving contact assembly, the moving contact point being disposed opposite to the static contact point;
[0011] Among them, the housing is made of ceramic, and there is a pressing plate at the connection between the moving contact component and the insulating seat, and the pressing plate is made of brass.
[0012] In some embodiments of the present utility model, the insulating seat has a mounting groove, and one end of the moving contact component is fixedly installed in the mounting groove.
[0013] In some embodiments of the present utility model, the mounting groove further has positioning posts, through holes are opened on both the moving contact component and the pressing plate, and the positioning posts are fixed through the through holes.
[0014] In some embodiments of the present utility model, the moving contact component includes a bimetallic strip and a moving contact piece, the bimetallic strip is close to the insulating seat, and the moving contact piece is far from the insulating seat.
[0015] In some embodiments of the present utility model, after the bimetallic strip is flipped, the convex side of the bimetallic strip contacts the insulating seat.
[0016] In some embodiments of the present utility model, the end face of the insulating seat facing the bimetallic strip has a protrusion.
[0017] In some embodiments of the present utility model, the moving contact piece has a convex hull protruding towards the bimetallic strip, and after the bimetallic strip is flipped, the edge of the bimetallic strip contacts the convex hull.
[0018] In some embodiments of the present utility model, a first positioning groove is opened inside the housing, and the insulating seat has a second positioning groove that slides with the first positioning groove.
[0019] In some embodiments of the present utility model, wires are welded to the static contact pin and the moving contact pin.
[0020] In some embodiments of the present utility model, the opening of the housing is sealed with glue.
[0021] The beneficial effects of the present utility model are as follows: Through the structural configuration of the static contact and the moving contact, the present utility model ensures the reliability of the circuit connection and disconnection operations, realizes the fast and accurate circuit on-off of the protector, and meets the basic functional requirements of the protector. The ceramic material has the advantages of high insulation, high temperature resistance and corrosion resistance, making the performance of the protector more stable in high-temperature and electrical environments. At the same time, the pressing plate made of brass has good wear resistance and corrosion resistance, which can enhance the connection strength and reliability, and reduce the possibility of poor contact during use. The protector of the present utility model effectively improves safety, durability and service life. Description of the Drawings
[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0023] Figure 1 It is a schematic structural diagram of the ceramic protector in the embodiment of the present invention;
[0024] Figure 2 It is a schematic internal structural diagram of the ceramic protector in the embodiment of the present invention;
[0025] Figure 3 It is an exploded decomposition diagram of the structure of the ceramic protector in the embodiment of the present invention;
[0026] Figure 4 It is a schematic structural diagram of the ceramic protector before and after the bimetallic strip flips in the embodiment of the present invention;
[0027] Figure 5 It is a cross-sectional view of the ceramic protector in the embodiment of the present invention. Detailed implementation manners
[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.
[0029] 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.
[0030] 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 the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0031] Such as Figures 1 to 5 The shown ceramic protector includes: a housing 1, an insulating seat 2, a static contact mechanism 3 and a moving contact mechanism 4.
[0032] One end of the housing 1 has an opening 11, and the interior has a receiving chamber 12;
[0033] The insulating base 2 is arranged inside the receiving chamber 12;
[0034] The static contact mechanism 3 is fixedly connected to one side of the insulating base 2, and includes a static contact piece 31, a static contact pin 32 arranged at one end of the static contact piece 31, and a static contact point 33 arranged at the other end of the static contact piece 31;
[0035] The moving contact mechanism 4 is fixed to the other side of the insulating base 2, and includes a moving contact assembly 41, a moving contact pin arranged at one end of the moving contact assembly 41, and a moving contact point 42 arranged on the moving contact assembly 41. The moving contact point 42 is arranged opposite to the static contact point 33. It should be noted here that there are many forms of the moving contact assembly 41, which can be a bimetallic strip 41a, or a combination of the bimetallic strip 41a and a moving contact piece 41b, or other forms that can generate deformation to disconnect or connect the moving contact point 42 and the static contact point 33.
[0036] Among them, the material of the housing 1 is ceramic, and there is a pressure plate 21 at the connection between the moving contact assembly 41 and the insulating base 2. The material of the pressure plate 21 is brass.
[0037] In the actual working process of the ceramic protector of the present invention, as Figure 4 shown, during normal operation, the moving contact point 42 is connected to the static contact point 33. The current flows through the moving contact pin to the moving contact assembly 41, then through the moving contact point 42 on the moving contact assembly 41 to the static contact point 33, and finally through the static contact point 33 to the static contact piece 31. The current is transmitted out through the static contact assembly at the other end of the static contact piece 31 to form a closed circuit; when a short circuit occurs in the external device or the temperature of the external device is abnormal, the moving contact assembly 41 in the protector deforms, causing the moving contact point 42 to separate from the static contact point 33, and the circuit of the protector is disconnected, thereby playing a role in protecting the circuit; when the external device returns to normal, the temperature of the moving contact assembly 41 in the protector drops and returns to the initial state, and the circuit of the protector is conducted and can be used again.
[0038] Through the structural configuration of the static contact point 33 and the moving contact point 42, the present invention ensures the reliability of the circuit connection and disconnection operations, realizes the fast and accurate circuit on-off of the protector, meets the basic functional requirements of the protector. The ceramic material has the advantages of high insulation, high temperature resistance and corrosion resistance, making the performance of the protector more stable in high temperature and electrical environments. At the same time, the pressure plate 21 made of brass has good wear resistance and corrosion resistance, which can enhance the connection strength and reliability, and reduce the possibility of poor contact during use. The protector of the present invention effectively improves the safety, durability and service life.
[0039] Such as Figure 2 、Figure 3 As shown in the figure, the insulating base 2 is provided with an installation groove 22, and one end of the moving contact assembly 41 is fixedly installed in the installation groove 22. By providing the installation groove 22 on the insulating base 2 and installing the moving contact assembly 41 in the installation groove 22, it effectively avoids the displacement or loosening of the moving contact assembly 41 during operation due to vibration or mechanical shock, improves the stability of the overall structure of the protector, and ensures that the moving contact assembly 41 can maintain an accurate position for a long time. When the circuit is switched on and off, the contact is more reliable, reducing the occurrence of poor contact. It should be noted here that there are many forms of installing the moving contact assembly 41 in the installation groove 22, which can be snap connection, riveting, screwing or other installation forms that can fix the moving contact assembly 41 in the installation groove 22.
[0040] Through the setting of the above-mentioned installation groove 22, the moving contact assembly 41 is installed in the installation groove 22. To make the installation of the moving contact assembly 41 more firm, continue to refer to Figure 2 、 Figure 3 As shown in the figure, the installation groove 22 is also provided with positioning posts 23, and through holes 24 are provided on both the moving contact assembly 41 and the pressure plate 21, and the positioning posts 23 pass through the through holes 24 for fixation. By extending the positioning posts 23 into the moving contact assembly 41 and the pressure plate 21 for fixation, it effectively prevents the moving contact assembly 41 and the pressure plate 21 from shifting or loosening during operation due to factors such as vibration and impact, ensuring that the internal structure of the protector is more stable. At the same time, the setting of the positioning posts 23 can ensure the precise positioning during the installation of the components, thereby reducing the risk of faults caused by component misalignment.
[0041] As Figure 3 、 Figure 4 shown, the moving contact assembly 41 includes a bimetallic strip 41a and a moving contact piece 41b. The bimetallic strip 41a is close to the insulating base 2, and the moving contact piece 41b is far from the insulating base 2. The bimetallic strip 41a has excellent temperature response characteristics. When current passes through the bimetallic strip 41a, the heat generated by the current will cause the bimetallic strip 41a to expand, resulting in deformation, so that the bimetallic strip 41a can quickly respond in case of short circuit, overload or abnormal high temperature, turn over in time, push open the moving contact piece 41b, and realize the disconnection of the circuit to protect the safety of equipment and personnel. The utility model combines the bimetallic strip 41a and the moving contact piece 41b, uses the temperature response of the bimetallic strip 41a to improve the reliability of the protector, and by the turning over of the bimetallic strip 41a to push open the moving contact piece 41b, it can also extend the service life of the protector and reduce the manufacturing cost.
[0042] As Figure 4 、 Figure 5As shown, after the bimetal 41a flips, the convex side 25 of the bimetal 41a contacts the insulating base 2. The contact between the bimetal 41a and the insulating base 2 after flipping can make the position of the bimetal 41a controllable. The bimetal 41a is supported by the fixing base, so that the bimetal 41a has support. It will not cause the moving contact 42 to be incompletely separated from the static contact 33 due to the insufficient flipping position of the bimetal 41a, affecting the use effect of the protector.
[0043] To make the contact position between the fixing base and the bimetal 41a more stable after the bimetal 41a flips in the above technical solution, continue to refer to Figure 4 、 Figure 5 As shown, the end face of the insulating base 2 facing the bimetal 41a has a convex 25. The design of the convex hull 41b1 provides an additional contact surface, enabling the flipped bimetal 41a to contact the moving contact piece 41b more stably. At the same time, it reduces the risk of knocking and hitting between the bimetal 41a and the fixing base during the flipping process, reducing the risk of wear on the bimetal 41a and increasing the service life of the protector.
[0044] As Figure 2 shown, the moving contact piece 41b has a convex hull 41b1 facing the convex 25 of the bimetal 41a. After the bimetal 41a flips, the edge of the bimetal 41a contacts the convex hull 41b1. The convex hull 41b1 provides an additional contact surface for the flipped bimetal 41a, enabling the flipped bimetal 41a to contact the moving contact piece 41b more stably. The existence of the convex hull 41b1 provides a good support point for the bimetal 41a, making the deformation of the moving contact piece 41b more obvious, enhancing the response sensitivity of the moving contact piece 41b when the temperature or current changes, so as to trigger the moving contact 42 more quickly and accurately, disconnect the circuit in time, and ensure safety.
[0045] As shown in the figure, Figure 3 the interior of the housing 1 is provided with a first positioning groove 13, and the insulating base 2 has a second positioning groove 26 that slides with the first positioning groove 13. The first positioning groove 13 and the second positioning groove 26 enable the fixing base to be accurately positioned inside the housing 1, thereby improving the installation accuracy of the component. Utilizing the sliding characteristics of the positioning groove, the fixing base can be quickly and accurately placed in the appropriate position during assembly, simplifying the production process, shortening the assembly time, and improving the production efficiency.
[0046] In some embodiments of the present utility model, wires are welded to the static contact pins 32 and the moving contact pins. Welding ensures a more secure contact between the wire and the pin, avoiding circuit failures caused by loosening or poor contact. At the same time, welding can prevent the connection between the pin and the wire from becoming loose under vibration, impact, or external force, enhancing the anti-interference ability and stability of the protector in harsh environments.
[0047] In some embodiments of the present utility model, glue injection sealing is performed at the opening 11 of the housing 1. Glue injection sealing can effectively prevent external environmental factors such as dust, moisture, and chemical substances from entering the interior of the protector, avoid damage to the internal electrical components, reduce the risk of electric leakage or short circuit caused by the internal components getting damp, and ensure the electrical safety and stability of the protector.
[0048] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A ceramic protector, characterized in that, Comprising: A housing having an opening at one end and a receiving chamber inside; An insulating base disposed inside the receiving chamber; A static contact mechanism fixedly connected to one side of the insulating base, including a static contact piece, a static contact pin disposed at one end of the static contact piece, and a static contact point disposed at the other end of the static contact piece; A moving contact mechanism fixed to the other side of the insulating base, including a moving contact assembly, a moving contact pin disposed at one end of the moving contact assembly, and a moving contact point disposed on the moving contact assembly, the moving contact point being disposed opposite to the static contact point; Wherein, the housing is made of ceramic, and a pressing plate is provided at the connection between the moving contact assembly and the insulating base, and the pressing plate is made of brass.
2. The ceramic protector according to claim 1, wherein The insulating base has a mounting groove, and one end of the moving contact assembly is fixedly mounted in the mounting groove.
3. The ceramic protector according to claim 2, wherein The mounting groove further has positioning posts, and through holes are provided on both the moving contact assembly and the pressing plate, and the positioning posts are fixed through the through holes.
4. The ceramic protector according to claim 1, characterized in that, The moving contact assembly includes a bimetallic strip and a moving contact piece, the bimetallic strip is close to the insulating base, and the moving contact piece is away from the insulating base.
5. The ceramic protector according to claim 4, characterized in that, After the bimetallic strip is flipped, the convex side of the bimetallic strip contacts the insulating base.
6. The ceramic protector according to claim 4, characterized in that, The end face of the insulating base facing the bimetallic strip has a protrusion.
7. The ceramic protector according to claim 4, characterized in that, The moving contact piece has a convex bulge facing the protrusion of the bimetallic strip, and after the bimetallic strip is flipped, the edge of the bimetallic strip contacts the convex bulge.
8. The ceramic protector according to claim 1, wherein, A first positioning groove is provided inside the housing, and the insulating base has a second positioning groove that slides with the first positioning groove.
9. The ceramic protector according to claim 1, characterized in that, Wires are welded to the static contact pin and the moving contact pin.
10. The ceramic protector according to claim 1, characterized in that, The opening of the housing is sealed with glue.