A power adapter overvoltage protection structure

Abstract

The utility model provides a kind of power adapter overvoltage protection structure, by drive slot drive insulated screw rod rotation, the process of rotation of insulated screw rod is driven by rotating plate, insulated connecting rod mobile electrode downward movement, and close to fixed electrode movement. The process of mobile electrode downward movement, the sliding rod set on the electricity receiving support plate on mobile electrode is inserted in sliding groove and moves along sliding groove. The distance between mobile electrode and fixed electrode is adjusted to control the breakdown voltage of adaptation. Nut is sleeved on wedge washer group insulated screw rod, so that nut is abutted with the bottom of accommodating groove by wedge washer group. So as to lock and fix insulated screw rod, so as to lock the distance between mobile electrode and fixed electrode, to lock the breakdown voltage of adaptation. When the voltage of power adapter is greater than breakdown voltage, mobile electrode and fixed electrode are electrified, so as to transmit the signal that the voltage of power adapter is greater than breakdown voltage.

Description

Technical Field

[0001] This utility model relates to the field of power adapters, and in particular to an overvoltage protection structure for power adapters. Background Technology

[0002] A power adapter is a power conversion device for small portable electronic devices and appliances. It generally consists of a casing, transformer, inductor, capacitor, control IC, PCB board, and other components. Its working principle is to convert AC input to DC output. Power adapters can be divided into wall-mounted and desktop types according to their connection method. They are widely used in security cameras, set-top boxes, routers, LED strips, massagers, and other devices. Overvoltage protection is one of the important mechanisms for protecting electrical equipment. When the operating voltage of the power adapter exceeds 15% of the rated voltage, the protection device will cut off the power supply to prevent equipment damage or quality degradation.

[0003] However, in traditional overvoltage protection structures, such as the technical solution to be protected in the invention entitled "Overvoltage Protector" (application number CN93225649.X), the distance between the two electrodes can change due to the loosening of the movable electrode, resulting in unstable protection voltage of the overvoltage protector and poor stability of the overvoltage protector. Utility Model Content

[0004] Therefore, it is necessary to provide a power adapter overvoltage protection structure to address the technical problem of unstable protection voltage in traditional overvoltage protection structures, which leads to poor stability of the overvoltage protector.

[0005] An overvoltage protection structure for a power adapter includes: an insulating receiving block, a driving mechanism, a moving electrode, and a fixed electrode.

[0006] The insulating receiving block has a receiving cavity inside, and a sliding groove is formed on the side wall of the receiving cavity; a wire-passing hole is formed on one side and the bottom of the insulating receiving block; a receiving groove is formed on the top of the insulating receiving block, and a threaded hole is formed in the middle area of ​​the bottom of the receiving groove, and the receiving groove communicates with the receiving cavity through the threaded hole;

[0007] The driving mechanism includes an insulating screw, a nut, a set of wedge-shaped washers, a rotating plate, and an insulating connecting rod. The insulating screw is adapted to the threaded hole, inserted into the threaded hole, and connected to the insulating receiving block. The top of the insulating screw is the driving end, and a driving groove is formed on the driving end. The bottom of the insulating screw is the receiving end. A U-shaped rotating groove is formed in the middle area of ​​the receiving end. The nut and the set of wedge-shaped washers are both received in the receiving groove. The nut and the set of wedge-shaped washers are adapted to the insulating screw. The nut is sleeved on the insulating screw and screwed to it. The set of wedge-shaped washers is sleeved on the insulating screw. The nut abuts against the bottom of the receiving groove through the set of wedge-shaped washers. The rotating plate is adapted to the U-shaped rotating groove, inserted into the U-shaped rotating groove, and rotatably connected to the insulating screw. One end of the insulating connecting rod is connected to the middle area of ​​the rotating plate.

[0008] The end of the insulating connecting rod away from the rotating plate is connected to the receiving plate on the moving electrode; a sliding rod is provided on the receiving plate on the moving electrode, the sliding rod is adapted to the sliding groove, one end of the sliding rod is inserted into the sliding groove and slidably connected to the insulating receiving block; the connecting wire of the moving electrode passes through a wire hole;

[0009] The fixed electrode and the movable electrode are symmetrically arranged; the power receiving plate on the fixed electrode is connected to the bottom of the receiving cavity; the power wire on the fixed electrode passes through another wire hole.

[0010] In one embodiment, the insulating connecting rod is a cylindrical structure.

[0011] In one embodiment, the insulating connecting rod is a quadrangular prism structure.

[0012] In one embodiment, the power receiving plate is a circular plate structure.

[0013] In one embodiment, the power receiving plate is a rectangular plate structure.

[0014] In one embodiment, the sliding rod is a cylindrical structure.

[0015] In one embodiment, the sliding rod is a quadrangular prism structure.

[0016] In one embodiment, the drive slot is a straight slot.

[0017] In one embodiment, the drive groove is a cross-shaped groove.

[0018] In one embodiment, the drive slot is a rectangular slot.

[0019] In operation, the aforementioned power adapter overvoltage protection structure drives an insulating screw to rotate via a drive groove. During rotation, the screw drives a moving electrode downwards and closer to the fixed electrode via a rotating plate and insulating connecting rod. As the moving electrode moves downwards, a sliding rod on the receiving plate of the moving electrode is inserted into a sliding groove and moves along it. This increases the stability of the moving electrode's downward movement, preventing wobbling and rotation. The breakdown voltage is adjusted by regulating the distance between the moving and fixed electrodes. A nut is fitted onto the insulating screw with a wedge-shaped washer assembly, causing the nut to abut against the bottom of the receiving groove. This locks the insulating screw in place, thus fixing the distance between the moving and fixed electrodes and thus the breakdown voltage. When the power adapter voltage exceeds the breakdown voltage, the moving and fixed electrodes are energized, transmitting a signal that the power adapter voltage exceeds the breakdown voltage. The aforementioned power adapter overvoltage protection structure provides a stable protection voltage and high operational stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overvoltage protection structure of a power adapter in one embodiment;

[0021] Figure 2 This is a schematic diagram of the structure of the insulating receiving block in one embodiment;

[0022] Figure 3 This is a schematic diagram of the drive mechanism in one embodiment. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening 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 intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please refer to the following: Figures 1 to 3 This utility model provides a power adapter overvoltage protection structure 10, which includes: an insulating receiving block 100, a driving mechanism 200, a moving electrode 300, and a fixed electrode 400.

[0029] An insulating receiving block 100 has a receiving cavity 101 inside, and a sliding groove 102 is formed on the side wall of the receiving cavity 101. A wire-passing hole 103 is formed on one side and the bottom of the insulating receiving block 100. A receiving groove 104 is formed on the top of the insulating receiving block 100, and a threaded hole 105 is formed in the middle area of ​​the bottom of the receiving groove 104. The receiving groove 104 communicates with the receiving cavity 101 through the threaded hole 105.

[0030] The drive mechanism 200 includes an insulating screw 210, a nut 220, a wedge-shaped washer assembly 230, a rotating plate 240, and an insulating connecting rod 250. The insulating screw 210 is adapted to a threaded hole 105, and is inserted into the threaded hole 105 and connected to the insulating receiving block 100. The top of the insulating screw 210 is the drive end, and a drive groove 201 is formed on the drive end. In this embodiment, the drive groove 201 is a straight groove. In another embodiment, the drive groove 201 is a cross-shaped groove. In yet another embodiment, the drive groove 201 is a rectangular groove. The bottom of the insulating screw 210 is the receiving end. A U-shaped rotating groove 202 is formed in the middle area of ​​the receiving end. The nut 220 and the wedge-shaped washer assembly 230 are both received in the receiving groove 104. Both the nut 220 and the wedge-shaped washer assembly 230 are adapted to the insulating screw 210. The nut 220 is sleeved on the insulating screw 210 and screwed into it. The wedge-shaped washer assembly 230 is sleeved on the insulating screw 210. The nut 220 abuts against the bottom of the receiving groove 104 through the wedge-shaped washer assembly 230. The rotating plate 240 is adapted to the U-shaped rotating groove 202, and the rotating plate 240 is inserted into the U-shaped rotating groove 202 and rotatably connected to the insulating screw 210. One end of the insulating connecting rod 250 is connected to the middle area of ​​the rotating plate 240. In this embodiment, the insulating connecting rod 250 has a cylindrical structure. In another embodiment, the insulating connecting rod 250 has a quadrangular prism structure.

[0031] The end of the insulating connecting rod 250 away from the rotating plate 240 is connected to the receiving plate on the moving electrode 300. In this embodiment, the receiving plate is a circular plate structure. In another embodiment, the receiving plate is a rectangular plate structure. A sliding rod 310 is provided on the receiving plate on the moving electrode 300. The sliding rod 310 is adapted to the sliding groove 102, and one end of the sliding rod 310 is inserted into the sliding groove 102 and slidably connected to the insulating receiving block 100. The connecting wire of the moving electrode 300 passes through a wire hole 103. In this embodiment, the sliding rod 310 is a cylindrical structure. In another embodiment, the sliding rod 310 is a quadrangular prism structure.

[0032] The fixed electrode 400 and the movable electrode 300 are arranged symmetrically. The power receiving plate on the fixed electrode 400 is connected to the bottom of the receiving cavity 101. The power wire on the fixed electrode 400 passes through another wire hole 103.

[0033] During operation, the overvoltage protection structure 10 of the power adapter drives the insulating screw 210 to rotate via the drive groove 201. As the insulating screw 210 rotates, it drives the movable electrode 300 downwards and closer to the fixed electrode 400 via the rotating plate 240 and the insulating connecting rod 250. During the downward movement of the movable electrode 300, the sliding rod 310 on the power receiving plate of the movable electrode 300 is inserted into the sliding groove 102 and moves along the sliding groove 102. This increases the stability of the downward movement of the movable electrode 300, preventing it from shaking. It also prevents the movable electrode 300 from rotating. The breakdown voltage is adjusted by regulating the distance between the movable electrode 300 and the fixed electrode 400. A nut 220 is fitted onto the insulating screw 210 via the wedge-shaped washer assembly 230, so that the nut 220 abuts against the bottom of the receiving groove 104 via the wedge-shaped washer assembly 230. This locks and secures the insulating screw 210, thereby fixing the distance between the moving electrode 300 and the fixed electrode 400 to lock the appropriate breakdown voltage. When the power adapter voltage exceeds the breakdown voltage, the moving electrode 300 and the fixed electrode 400 are energized, thus transmitting a signal that the power adapter voltage exceeds the breakdown voltage. The overvoltage protection structure 10 of the aforementioned power adapter has a stable protection voltage and high operational stability.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An overvoltage protection structure for a power adapter, characterized in that, include: Insulating receiving block, driving mechanism, moving electrode and fixed electrode; The insulating receiving block has a receiving cavity inside, and a sliding groove is formed on the side wall of the receiving cavity; a wire-passing hole is formed on one side and the bottom of the insulating receiving block; a receiving groove is formed on the top of the insulating receiving block, and a threaded hole is formed in the middle area of ​​the bottom of the receiving groove, and the receiving groove communicates with the receiving cavity through the threaded hole; The driving mechanism includes an insulating screw, a nut, a set of wedge-shaped washers, a rotating plate, and an insulating connecting rod. The insulating screw is adapted to the threaded hole, inserted into the threaded hole, and connected to the insulating receiving block. The top of the insulating screw is the driving end, and a driving groove is formed on the driving end. The bottom of the insulating screw is the receiving end. A U-shaped rotating groove is formed in the middle area of ​​the receiving end. The nut and the set of wedge-shaped washers are both received in the receiving groove. The nut and the set of wedge-shaped washers are adapted to the insulating screw. The nut is sleeved on the insulating screw and screwed to it. The set of wedge-shaped washers is sleeved on the insulating screw. The nut abuts against the bottom of the receiving groove through the set of wedge-shaped washers. The rotating plate is adapted to the U-shaped rotating groove, inserted into the U-shaped rotating groove, and rotatably connected to the insulating screw. One end of the insulating connecting rod is connected to the middle area of ​​the rotating plate. The end of the insulating connecting rod away from the rotating plate is connected to the receiving plate on the moving electrode; a sliding rod is provided on the receiving plate on the moving electrode, the sliding rod is adapted to the sliding groove, one end of the sliding rod is inserted into the sliding groove and slidably connected to the insulating receiving block; the connecting wire of the moving electrode passes through a wire hole; The fixed electrode and the movable electrode are symmetrically arranged; the power receiving plate on the fixed electrode is connected to the bottom of the receiving cavity; the power wire on the fixed electrode passes through another wire hole.

2. The power adapter overvoltage protection structure according to claim 1, characterized in that, The insulating connecting rod has a cylindrical structure.

3. The power adapter overvoltage protection structure according to claim 1, characterized in that, The insulating connecting rod has a quadrangular prism structure.

4. The power adapter overvoltage protection structure according to claim 1, characterized in that, The power receiving plate is a circular plate structure.

5. The power adapter overvoltage protection structure according to claim 1, characterized in that, The power receiving plate is a rectangular plate structure.

6. The power adapter overvoltage protection structure according to claim 1, characterized in that, The sliding rod has a cylindrical structure.

7. The power adapter overvoltage protection structure according to claim 1, characterized in that, The sliding rod has a quadrangular prism structure.

8. The power adapter overvoltage protection structure according to claim 1, characterized in that, The drive slot is a straight slot.

9. The power adapter overvoltage protection structure according to claim 1, characterized in that, The drive groove is a cross-shaped groove.

10. The power adapter overvoltage protection structure according to claim 1, characterized in that, The drive slot is a rectangular slot.

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