Charger protection device

Abstract

The utility model belongs to the technical field of chargers, and particularly relates to a charger protection device which comprises a charger shell, a fixed plug is fixed on one side of the top of the charger shell, a fixed sleeve is fixed on the inner wall of the charger shell, the fixed plug is arranged in the fixed sleeve in a penetrating mode, a groove is formed in the other side of the charger shell, and the fixed plug is arranged in the groove. A sliding hole is formed in the bottom groove wall of the groove, the sliding hole is communicated with the cavity of the charger shell, movable plastic push rods are arranged in the sliding hole in a sliding mode, and push plates are fixed to the ends of the two movable plastic push rods at the same time; when the wall socket is used, a circuit between the fixed plug and the circuit board can be disconnected, the charger can be disconnected when the charger is not separated from the wall socket, the charger can be uncharged when the charger is not used, the safety of the charger can be better protected, damage caused by instability of a mains supply circuit is avoided, and the safety of the charger is improved. Meanwhile, the loss of the plugboard and the charger caused by reciprocating plugging is reduced, and the service life of the charger is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of charger technology, specifically a charger protection device. Background Technology

[0002] A charger is a device that converts alternating current (AC) into low-voltage direct current (DC). It is mainly used to power rechargeable batteries. With social progress and development, a variety of electronic products have entered people's daily lives. In order to be suitable for different electronic products, different electronic products have corresponding chargers.

[0003] A Chinese patent with publication number CN117748693B discloses a charger, including a charger body and a charging cable. The outer wall of the USB connector of the charger body has a first annular groove and a second annular groove arranged circumferentially thereon. The second annular groove is located between the first annular groove and the port of the USB connector for inserting the charging cable. A third annular groove is arranged circumferentially inside the USB connector, corresponding to the second annular groove and fitting with the outer ring of a second sealing ring. The USB connector is fixed inside the USB connector by the pressing force between the first sealing ring and the side wall of the USB connector, and by the pressing force between the outer ring of the second sealing ring and the inner wall of the third annular groove. This effectively prevents the charging cable from separating from the charger body, improves the insertion feel between the USB connector and the USB connector, and effectively prevents dust from falling into the USB connector.

[0004] During the use of a charger, it is often left plugged into a wall socket for extended periods without being unplugged, with only the device being charged being plugged and unplugged. Prolonged plugging and unplugging can damage the circuit due to instability. Furthermore, since the charging cable is energized, contact with flammable materials by the charger's connectors can pose a fire risk. The frequent plugging and unplugging of the charger from the socket also causes wear and tear. Given these issues, the charger lacks self-protection, making it vulnerable to damage and posing a safety hazard. Therefore, a charger protection device is proposed to address these problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems mentioned in the background, this utility model proposes a charger protection device.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A charger protection device of this utility model includes a charger housing. A fixed plug is fixed to one side of the top of the charger housing. A fixed sleeve is fixed to the inner wall of the charger housing. The fixed plug is disposed inside the fixed sleeve. A groove is formed on the other side of the charger housing. A sliding hole is formed on the bottom wall of the groove, and the sliding hole communicates with the cavity of the charger housing. Movable plastic push rods are slidably disposed inside the sliding hole. Push plates are fixed to the ends of two movable plastic push rods. The push plates and the groove on the outer wall of the charger housing are mating structures. Sealing plates are fixed to the other ends of the two movable plastic push rods. A first spring is fixed between the middle of one side of the sealing plate and the inner wall of one side of the charger housing. A mating plug is fixed to the other side of the sealing plate. The mating plug is arranged parallel to the fixed plug. An elastic electrode tab is fixed to the bottom side of the fixed plug. The elastic electrode tab is slidably tangentially contacted with the top side of the mating plug. A mating buckle is horizontally fixed at the bottom center of the other side of the sealing plate. To better ensure the safety of the charger and protect the charger itself, a mating plug is provided. During charging, pushing the push plate allows two movable plastic push rods to slide within the sliding holes. When the push plate is pushed into the groove on the outer wall of the charger housing, the movement of the two movable plastic push rods causes the sealing plate to move, stretching the first spring. After the sealing plate moves, the mating buckle at the bottom of the sealing plate can engage with the pressing buckle, allowing the mating plug to contact the elastic electrode tab on the bottom side of the fixed plug. This enables the internal circuitry of the charger to be connected, allowing normal charging operation.

[0007] Preferably, a T-shaped mounting hole is provided on the top side wall of the charger housing, and a pressing rod is movably disposed within the T-shaped mounting hole. A button is provided at the top of the pressing rod, and a limiting ring is fitted onto the upper middle part of the pressing rod. A second spring is fixed between the limiting ring and the top inner wall of the charger housing, and the second spring is sleeved on the top of the pressing rod. A fixing rod is provided on the other inner wall of the charger housing, and a positioning ring is fixed on the fixing rod. The positioning ring is sleeved on the bottom outer side of the pressing rod, and a pressing buckle is fixed at the bottom end of the pressing rod. The pressing buckle and the mating buckle are in a mating snap-fit ​​structure. When not charging, pressing the button on the top of the push-button lever separates the push-button latch from the mating latch. After separation, the stretched first spring automatically retracts, pulling the mating plug to the elastic electrode tab separation state, thus cutting off power inside the charger. This disconnects the circuit between the fixed plug and the circuit board, allowing the charger to be disconnected even when it is not disconnected from the wall socket. The charger is de-energized when not in use, better protecting its safety from damage caused by unstable mains power. It also reduces wear and tear on the socket and charger from repeated plugging and unplugging, extending the charger's lifespan.

[0008] Preferably, an isolation plate and a mounting plate are fixedly connected between the inner walls of the two sides of the charger housing, and the isolation plate is located above the mounting plate. The isolation plate has a wire groove. In order to ensure the stable connection between the mating plug and the circuit board, the wire groove is provided so that the internal circuit can move more easily during the movement of the mating plug, ensuring smooth circuit connection.

[0009] Preferably, a connecting plate is provided on the bottom side of the mating plug. A screw hole is opened inside the connecting plate, and a locking screw is screwed into the screw hole. A pressing plate is movably mounted on the locking screw. The pressing plate is opposite to the connecting plate. A connecting wire is wound around the locking screw. The end of the connecting wire is located between the connecting plate and the pressing plate. The other end of the connecting wire is connected to the input electrode of the lower circuit board, and the connecting wire passes through the wire groove. An output connector is provided at the bottom of the charger housing. The output connector is connected to the electrode of the circuit board. In order to ensure the smooth flow of the internal circuit of the charger, a connecting wire needs to be connected between the input electrode of the circuit board and the mating plug. When connecting, one end of the connecting wire is wound around the middle of the locking screw. With the rotation of the locking screw, the pressing plate can approach the connecting plate, thereby pressing and fixing the connecting wire wound around the locking screw. The other end of the connecting wire is fixed on the circuit board, realizing the connection of the internal circuit.

[0010] The advantages of this utility model are:

[0011] To achieve self-protection of the charger and improve safety, this invention allows for the separation of the pressing latch and the mating latch when not charging. Under the contraction of the first spring, the mating plug is pulled to the separated state of the elastic electrode tab, thus cutting off power inside the charger. This also disconnects the circuit between the fixed plug and the circuit board, ensuring the charger is unplugged even when not in use. The charger is de-energized when not in use, better protecting it from damage caused by unstable mains power. Furthermore, it reduces wear and tear on the plug and charger from repeated plugging and unplugging, extending the charger's lifespan. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device;

[0014] Figure 2 This is a three-dimensional structural diagram of the internal components of the charger casing;

[0015] Figure 3 This is a first cross-sectional three-dimensional structural diagram of the charger casing;

[0016] Figure 4 This is a schematic diagram of the second cross-sectional three-dimensional structure of the charger housing;

[0017] Figure 5 This is a schematic diagram of the third sectional view of the charger housing.

[0018] Figure 6 This is a schematic diagram of the three-dimensional structure of the plug assembly.

[0019] In the diagram: 1. Charger housing; 2. Fixed plug; 3. Fixed sleeve; 4. Movable plastic push rod; 5. Push plate; 7. Sealing plate; 8. First spring; 14. Elastic electrode tab; 15. Mating plug; 18. Mating buckle; 19. T-shaped mounting hole; 20. Pressing rod; 21. Limiting ring; 22. Second spring; 23. Fixed rod; 24. Positioning ring; 25. Pressing buckle; 32. Locking screw; 33. Extrusion plate; 34. Connecting wire; 35. Output connector; 36. Vent hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figure 1-5As shown, a charger protection device includes a charger housing 1. A fixed plug 2 is fixed to one side of the top of the charger housing 1. A fixed sleeve 3 is fixed to the inner wall of the charger housing 1. The fixed plug 2 passes through the fixed sleeve 3. A groove is formed on the other side of the charger housing 1. A sliding hole is formed on the bottom wall of the groove. The sliding hole communicates with the cavity of the charger housing 1. Movable plastic push rods 4 are slidably arranged inside the sliding hole. Push plates 5 are fixed to the ends of two movable plastic push rods 4. The push plates 5 and the groove on the outer wall of the charger housing 1 are mating structures. Sealing plates 7 are fixed to the other ends of the two movable plastic push rods 4. A first spring 8 is fixed between the middle of one side of the sealing plate 7 and the inner wall of one side of the charger housing 1. A mating plug 15 is fixed to the other side of the sealing plate 7. The mating plug 15 is arranged parallel to the fixed plug 2. An elastic electrode tab 14 is fixed to the bottom side of the fixed plug 2. The elastic electrode tab 14 slides tangentially in contact with the top side of the mating plug 15. On the other side of the sealing plate 7, at the bottom center, a matching buckle 18 is horizontally fixed. During operation, to ensure better safety and protect the charger itself, it is important to note that during normal use, the charger is often plugged into a wall socket and left plugged in for extended periods, with only the device being charged being plugged and unplugged. Prolonged plugging in can cause circuit instability and damage. Furthermore, since the charging cable is energized, contact with flammable materials by the charger's connectors can pose a fire risk. Therefore, to protect the charger, a matching buckle 18 is installed. When the plug 15 is charging, pushing the push plate 5 allows the two movable plastic push rods 4 to slide within the sliding hole. Pushing the push plate 5 into the groove on the outer wall of the charger housing 1 allows the sealing plate 7 to move during the movement of the two movable plastic push rods 4, stretching the first spring 8. After the sealing plate 7 moves, the mating buckle 18 at the bottom of the sealing plate 7 can engage with the pressing buckle 25, allowing the mating plug 15 to contact the elastic electrode tab 14 on the bottom side of the fixed plug 2, thus enabling the connection of the internal circuit of the charger and achieving normal charging operation.

[0022] The top side wall of the charger housing 1 is provided with a T-shaped mounting hole 19. A pressing rod 20 is movably installed in the T-shaped mounting hole 19. A button is provided at the top of the pressing rod 20. A limiting ring 21 is fitted on the upper middle part of the pressing rod 20. A second spring 22 is fixed between the limiting ring 21 and the top inner wall of the charger housing 1, and the second spring 22 is sleeved on the top of the pressing rod 20. A fixing rod 23 is provided on the other inner wall of the charger housing 1. A positioning ring 24 is fixed on the fixing rod 23. The positioning ring 24 is sleeved on the bottom outer side of the pressing rod 20. A pressing buckle 25 is fixed at the bottom end of the pressing rod 20. The pressing buckle 25 and the mating buckle 18 are mating buckles. The charging structure is designed to separate the pressing latch 25 from the mating latch 18 when not charging. After separation, the stretched first spring 8 automatically retracts, pulling the mating plug 15 to the separated state of the elastic electrode tab 14, thus disconnecting the power inside the charger. This design also disconnects the circuit between the fixed plug 2 and the circuit board, allowing the charger to be disconnected even when it is not disconnected from the wall socket. The charger is not powered when not in use, which better protects the charger from damage caused by unstable mains power. It also reduces wear and tear on the socket and charger caused by repeated plugging and unplugging, thus extending the charger's lifespan.

[0023] Please see Figure 4-5 As shown, an isolation plate 26 and a mounting plate are fixedly connected between the inner walls of the two sides of the charger housing 1, and the isolation plate 26 is located above the mounting plate. A wire groove is provided on the isolation plate 26. During operation, in order to ensure the stable connection between the mating plug 15 and the circuit board, a wire groove is provided, which can facilitate the movement of the internal circuit during the movement of the mating plug 15, and ensure the smooth circuit connection.

[0024] Please see Figure 2 and Figure 5As shown, a connecting plate 31 is provided on the bottom side of the mating plug 15. A screw hole is provided inside the connecting plate 31, and a locking screw 32 is screwed into the screw hole. A pressing plate 33 is movably disposed on the locking screw 32. The pressing plate 33 is disposed opposite to the connecting plate. A connecting wire 34 is wound around the locking screw 32, and the end of the connecting wire 34 is located between the connecting plate and the pressing plate 33. The other end of the connecting wire 34 is connected to the input electrode of the lower circuit board, and the connecting wire 34 passes through the wire groove. The bottom of the charger housing 1 is provided with an output connector 35, which is connected to the electrode of the circuit board. During operation, in order to ensure the smooth operation of the internal circuit of the charger, a connecting wire 34 needs to be connected between the input electrode of the circuit board and the mating plug 15. When connecting, one end of the connecting wire 34 is wrapped around the middle of the locking screw 32. Under the rotation of the locking screw 32, the pressing plate 33 can be brought close to the connecting plate 31 to press and fix the connecting wire 34 wrapped around the locking screw 32. The other end of the connecting wire 34 is fixed on the circuit board to realize the connection of the internal circuit.

[0025] Working principle: During charger use, the charger is often plugged into a wall socket for extended periods without being unplugged, with only the device being charged being plugged and unplugged. Prolonged plugging and unplugging can cause circuit instability and damage. Furthermore, since the charging cable is energized, contact with flammable materials by the charger connectors can pose a fire risk. The frequent plugging and unplugging of the charger also causes wear and tear. Given these issues, the charger lacks self-protection, leading to easy damage and potential hazards. Therefore, a charger protection device is proposed to address these problems. To improve charger safety and protect the charger itself, a mating plug 15 is included. During charging, pushing the push plate 5 causes two movable plastic push rods 4 to slide within sliding holes. The push plate 5 is then pushed into a groove on the outer wall of the charger housing 1. During the movement of the two movable plastic push rods 4... The device enables the sealing plate 7 to move, stretching the first spring 8. After the sealing plate 7 moves, the mating buckle 18 at the bottom of the sealing plate 7 can engage with the pressing buckle 25, allowing the mating plug 15 to contact the elastic electrode tab 14 on the bottom side of the fixed plug 2. This enables the internal circuit of the charger to be connected, allowing normal charging operation. When not charging, pressing the button on the top of the pressing rod 20 can separate the pressing buckle 25 from the mating buckle 18. After separation, the stretched first spring 8 automatically retracts, pulling the mating plug 15 to the separated state of the elastic electrode tab 14, thus cutting off the power inside the charger. This device can also disconnect the circuit between the fixed plug 2 and the circuit board, allowing the charger to be disconnected even when it is not disconnected from the wall socket. This ensures that the charger is not energized when not in use, better protecting the charger from damage caused by unstable mains power. It also reduces wear and tear on the socket and charger caused by repeated plugging and unplugging, extending the charger's lifespan.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A charger protection device, characterized in that: The charger includes a charger housing (1), a fixed plug (2) is fixed on one side of the top of the charger housing (1), a fixed sleeve (3) is fixed on the inner wall of the charger housing (1), the fixed plug (2) is disposed through the fixed sleeve (3), a groove is provided on the other side of the charger housing (1), a sliding hole is provided on the bottom wall of the groove, the sliding hole is connected to the cavity of the charger housing (1), a movable plastic push rod (4) is slidably disposed inside the sliding hole, and a push plate (5) is fixed at the end of the two movable plastic push rods (4), the push plate (5) is connected to the charger housing (1). The groove on the outer wall of the casing (1) is a mating structure. The other ends of the two movable plastic push rods (4) are simultaneously fixed with a sealing plate (7). A first spring (8) is fixed between the middle of one side of the sealing plate (7) and the inner wall of one side of the charger casing (1). A mating plug (15) is fixed on the other side of the sealing plate (7). The mating plug (15) is arranged parallel to the fixed plug (2). An elastic electrode paddle (14) is fixed on the bottom side of the fixed plug (2). The elastic electrode paddle (14) slides and tangentially contacts the top side of the mating plug (15). A matching buckle (18) is horizontally fixed at the middle of the bottom of the other side of the sealing plate (7). A T-shaped mounting hole (19) is provided on the top side wall of the charger housing (1). A pressing rod (20) is movably arranged in the T-shaped mounting hole (19). A button is provided at the top of the pressing rod (20). A limiting ring (21) is fitted on the upper part of the middle of the pressing rod (20). A second spring (22) is fixed between the limiting ring (21) and the top inner wall of the charger housing (1). The second spring (22) is sleeved on the top of the pressing rod (20).

2. The charger protection device according to claim 1, characterized in that: A fixing rod (23) is provided on the inner wall of the other side of the charger housing (1). A positioning ring (24) is fixed on the fixing rod (23). The positioning ring (24) is sleeved on the bottom outer side of the pressing rod (20). A pressing buckle (25) is fixed at the bottom end of the pressing rod (20). The pressing buckle (25) and the matching buckle (18) are a matching snap-fit ​​structure.

3. The charger protection device according to claim 1, characterized in that: The bottom side of the mating plug (15) is provided with a connecting plate (31), the inside of the connecting plate (31) is provided with a screw hole, a locking screw (32) is screwed in the screw hole, and a pressing plate (33) is movably provided on the locking screw (32), the pressing plate (33) and the connecting plate (31) are opposite to each other.

4. A charger protection device according to claim 3, characterized in that: The locking screw (32) is wound with a connecting wire (34). The end of the connecting wire (34) is located between the connecting plate (31) and the extrusion plate (33). The other end of the connecting wire (34) is connected to the input electrode of the lower circuit board, and the connecting wire (34) passes through the wire groove ((28)).

5. A charger protection device according to claim 1, characterized in that: The bottom of the charger housing (1) is provided with an output connector (35), which is connected to the electrodes of the circuit board.

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