A charger

Abstract

This invention belongs to the field of charger technology, specifically relating to a charger, including a charger body, a main body and a sub-body. The top of the main body has a USB port, and the bottom of the sub-body has a hinged insert. A storage shell is fixedly connected to the bottom of the sub-body away from the insert. A U-shaped cover is slidably inserted into the storage shell near the insert. A clamping device is provided at the end of the U-shaped cover near the insert. A first slider is fixedly connected to the top of the U-shaped cover. A first groove is formed on the bottom of the main body corresponding to the position of the first slider, and the first slider is slidably installed in the first groove. The clamping device has a retracted state flush with the U-shaped cover and an extended state protruding from the lower surface of the U-shaped cover to abut against the side of the power strip. This charger effectively solves the problem of chargers becoming loose when the width of the power strip is small, causing excessive suspension.

Description

Technical Field

[0001] This invention belongs to the field of charger technology, and specifically relates to a charger. Background Technology

[0002] A charger is a charging device that uses high-frequency power supply technology and advanced intelligent dynamic adjustment charging technology. With continuous technological advancements, many new technologies and concepts from the computer and power electronics fields have been introduced into the charger industry. Chargers have made significant progress compared to previous products in terms of key performance, size, adaptability to environmental conditions, and reliability; some indicators have even seen qualitative leaps. For example, the recently widely used potassium nitride semiconductor material has further reduced the size and weight of mobile phone chargers, thus further promoting charger improvements.

[0003] As the power of electronic and electrical products gradually increases, the size of chargers also increases. This means that when a large charger is plugged into a power strip, due to the limited size of the power strip and the narrowness of the power strip, half or more of the charger is suspended in the air (the suspended part extends outside the power strip and fails to abut against the upper surface of the power strip). This makes the charger prone to loosening during charging, thus affecting its normal use.

[0004] Therefore, it is necessary to invent a charger to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a charger that effectively solves the issue of chargers becoming loose due to excessive suspension when the width of the power strip is small.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a charger, comprising a charger body, the charger body comprising a main body and a sub-body at its bottom, wherein the bottom area of ​​the sub-body is smaller than the bottom area of ​​the main body, a USB port is provided at the top of the main body, a plug is hinged to the bottom of the sub-body, and a storage groove matching the plug is provided at the position of the bottom of the sub-body opposite to the plug.

[0007] A storage shell is fixedly connected to the bottom of the sub-body away from the insert. A U-shaped cover is slidably inserted into the end of the storage shell near the insert. A pressing device is provided at the end of the U-shaped cover near the insert. A first slider is fixedly connected to the top of the U-shaped cover. A first groove is opened at the bottom of the main body corresponding to the position of the first slider, and the first slider is slidably installed in the first groove.

[0008] The clamping device has a retracted state flush with the U-shaped cover and an extended state protruding from the lower surface of the U-shaped cover to abut against the side of the power strip.

[0009] Optionally, the clamping device includes a U-shaped plate, which has the same shape as a U-shaped cover. Two second sliding grooves are vertically formed on the side of the U-shaped plate opposite to the U-shaped cover. A second slider is slidably installed in the second sliding groove. The part of the second slider outside the second sliding groove is fixedly connected to the U-shaped cover. Limiting blocks are fixedly connected to both inner sidewalls of the U-shaped plate. A first limiting groove and a second limiting groove are formed horizontally and parallel to the position of the limiting blocks on the side of the sub-body. The first limiting groove is located above the second limiting groove, and an inclined groove connects the first limiting groove and the second limiting groove. A guide rod is provided at the end of the second limiting groove away from the insert. A pressure block is fixedly connected to the end of the guide rod. A spring for driving the guide rod and the pressure block to slide toward the insert is sleeved on the guide rod.

[0010] Optionally, the U-shaped cover has a deflection groove with an opening facing the U-shaped plate inside. A movable strip is provided between the U-shaped plate and the U-shaped cover. The movable strip has a strip-shaped hole extending in the vertical direction. The second slider passes through the movable strip. A telescopic rod is provided in the deflection groove. One end of the telescopic rod is rotatably connected to the groove wall of the deflection groove, and the connection point is close to the bottom groove wall of the deflection groove. The other end of the telescopic rod is inserted into the strip-shaped hole and rotatably connected to the strip-shaped hole. The connection point is located at the upper middle position of the movable strip. The bottom of the two movable strips is provided with the same support strip. The support strip is fixedly connected to the side of the U-shaped plate near the U-shaped cover.

[0011] Optionally, the U-shaped plate has two symmetrically arranged inclined grooves along the vertical direction on the side away from the U-shaped cover, and the two inclined grooves are close to the two sides of the U-shaped plate. A trapezoidal strip is slidably installed in the inclined groove. The thickness of the trapezoidal strip gradually increases from top to bottom, and the side of the trapezoidal strip away from the U-shaped cover is located outside the inclined groove. The inclined surface of the trapezoidal strip is opposite to and matches the inclined surface of the inclined groove. A groove is formed on the bottom wall of the inclined groove. A spring piece is inclinedly fixedly connected in the groove, and the top of the spring piece is always in contact with the bottom of the trapezoidal strip.

[0012] Optionally, the bottom of the main body is provided with a sliding baffle near the insert. A first magnetic strip is fixedly connected to the side of the baffle near the pressing device, and the first magnetic strip is close to the bottom of the baffle. A second magnetic strip is fixedly connected to the side of the pressing device near the baffle, and the second magnetic strip is close to the bottom of the pressing device. A third magnetic strip for magnetic connection with the first magnetic strip is fixedly connected to the side of the sub-body near the baffle. The third magnetic strip is located above the insert, and the magnetic poles on the opposite side of the third magnetic strip and the first magnetic strip, as well as the magnetic poles on the opposite side of the second magnetic strip and the first magnetic strip, are all opposite magnetic poles.

[0013] Optionally, a strip-shaped protrusion is fixedly connected to the side of the baffle away from the pressing device. The strip-shaped protrusion is close to the bottom of the baffle, and a handle groove is opened on the main body corresponding to the middle of the strip-shaped protrusion.

[0014] Optionally, the length of the trapezoidal strip outside the inclined groove is equal to the maximum change of the trapezoidal strip in the horizontal direction, and multiple anti-slip strips are fixedly connected to the side of the trapezoidal strip outside the inclined groove.

[0015] Optionally, the pressure block is closer to the U-shaped plate than the storage shell, and the side of the pressure block closest to the U-shaped plate has an arc surface design.

[0016] Optionally, the inclined groove is close to the side of the first limiting groove near the insert, and the inclined groove is inclined from top to bottom in a direction away from the insert.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. When the reserved space or support area of ​​the power strip is insufficient, pull the U-shaped plate to let it enter the second limiting groove through the inclined groove, so that the U-shaped plate can move downward a certain distance. As the U-shaped plate continues to move, the limiting block gradually compresses the spring. When the limiting block reaches the maximum displacement, lock the current position of the U-shaped plate by hand. After the plug is inserted, slowly release the U-shaped plate, so that it is gradually squeezed together with the side of the power strip under the push of the spring. This applies a supporting force to the suspended part of the charger body through the side of the power strip. When the suspended part of the charger body deflects downward under the action of gravity, the supporting force can prevent the suspended part of the charger body from deflecting downward, thereby ensuring a stable connection between the charger body and the power strip.

[0019] 2. When the U-shaped plate moves along the inclined groove towards the second limiting groove, the movable bar can move downward under the friction force of the U-shaped plate. When the telescopic rod contacts the bottom wall of the deflection groove, the telescopic rod stops deflecting, while the U-shaped plate can continue to move downward along the inclined groove for a certain distance. When the U-shaped plate drives the limiting block into the second limiting groove, the U-shaped plate also stops moving downward. As the U-shaped plate squeezes the spring along the second limiting groove, the two movable bars can provide a large area of ​​support from the side of the U-shaped plate, so that the U-shaped plate can maintain a good vertical state. Then, when the U-shaped plate is squeezed against the side of the power strip under the action of the spring, the U-shaped plate can apply a more stable supporting force to the charger body through the side of the power strip, and prevent the U-shaped plate from tilting due to the reaction force of the side of the power strip.

[0020] 3. As the U-shaped plate gradually presses against the side of the power strip, the trapezoidal strip, due to the reaction force of the power strip, begins to slide downwards along the inclined surface of the groove. During this process, the portion of the trapezoidal strip outside the groove gradually enters the groove, while the spring piece gradually enters the groove under the pressure of the trapezoidal strip. When the U-shaped plate is completely pressed against the side of the power strip, the trapezoidal strip is also completely inside the groove. Since the spring piece is in a compressed state at this time, it exerts an upward pushing force on the trapezoidal strip, causing the trapezoidal strip to tend to move upwards. Therefore, the trapezoidal strip can exert an upward pushing force on the U-shaped plate through the inclined surface of the groove, thus enabling the suspended part of the charger body to maintain a horizontal state better under the action of this pushing force, ensuring a stable connection between the charger body and the power strip.

[0021] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 This is a first perspective view of the charger body in this invention;

[0025] Figure 3 In this invention Figure 2 Enlarged view of part A;

[0026] Figure 4 This is a second perspective view of the charger body in this invention;

[0027] Figure 5 This is a three-dimensional schematic diagram of the U-shaped plate, U-shaped cover, and storage shell in this invention;

[0028] Figure 6 This is a three-dimensional schematic diagram of the U-shaped plate and the movable strip in this invention;

[0029] Figure 7 This is a partial three-dimensional sectional view of the U-shaped plate in this invention;

[0030] Figure 8 This is a three-dimensional schematic diagram of the U-shaped plate in this invention;

[0031] Figure 9 This is a three-dimensional schematic diagram of the baffle in this invention;

[0032] Figure 10 This is a schematic diagram of the charger being inserted into a wider power strip in this invention;

[0033] Figure 11 This is a schematic diagram of the charger being inserted into a narrower power strip in this invention.

[0034] In the diagram: 1. Charger body; 2. Main body; 3. Sub-body; 4. USB port; 5. Insert; 6. Storage shell; 7. U-shaped cover; 71. Deflection groove; 8. Pressing device; 81. U-shaped plate; 82. Second slider; 83. Limiting block; 84. First limiting groove; 85. Second limiting groove; 86. Inclined groove; 87. Guide rod; 88. Pressure block; 89. Spring; 9. First slider; 10. Movable bar; 11. Telescopic rod; 12. Support bar; 13. Trapezoidal strip; 14. Spring piece; 15. Baffle; 16. First magnetic strip; 17. Second magnetic strip; 18. Third magnetic strip; 19. Strip protrusion; 20. Anti-slip strip; 21. Power strip. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides, for example Figures 1-9 A charger is shown, comprising a charger body 1, which encloses a main body 2 and a sub-body 3 at its bottom. The bottom area of ​​the sub-body 3 is smaller than that of the main body 2. A USB port 4 is provided on the top of the main body 2. A plug 5 is hinged to one end of the bottom of the sub-body 3, and a storage groove matching the plug 5 is provided on the bottom of the sub-body 3 opposite to the plug 5. The plug 5 can rotate to be stored in or outside the storage groove. A storage shell 6 is fixedly connected to the bottom of the sub-body 3 away from the plug 5. A U-shaped cover 7 is slidably inserted into the end of the storage shell 6 near the plug 5. A pressing device 8 is provided on the end of the U-shaped cover 7 near the plug 5. A first slider 9 is fixedly connected to the top of the U-shaped cover 7. A first sliding groove is provided on the bottom of the main body 2 corresponding to the position of the first slider 9, and the first slider 9 is slidably installed in the first sliding groove. The pressing device 8 includes a U-shaped plate 81, which has the same shape as the U-shaped cover 7.

[0037] In this embodiment, the U-shaped plate 81 has a retracted state that is flush with the U-shaped cover 7, and an extended state that protrudes from the lower surface of the U-shaped cover 7 to abut against the side of the power strip.

[0038] The bottom of the main body 2 is provided with a baffle 15 that slides up and down near the insert 5. Specifically, the baffle 15 can slide upward relative to the main body 2 and be housed inside the main body 2. At this time, the end face of the sub-body 3 opposite to the baffle 15 is exposed. The baffle 15 can also slide downward relative to the main body 2 and cover the end face of the sub-body 3 opposite to the baffle 15.

[0039] A first magnetic strip 16 is fixedly connected to the side of the baffle 15 near the pressing device 8, and the first magnetic strip 16 is close to the bottom of the baffle 15. A second magnetic strip 17 for magnetic connection with the first magnetic strip 16 is fixedly connected to the side of the pressing device 8 near the baffle 15, and the second magnetic strip 17 is close to the bottom of the pressing device 8. A third magnetic strip 18 for magnetic connection with the first magnetic strip 16 is fixedly connected to the side of the sub-body 3 near the baffle 15, and the third magnetic strip 18 is located above the insert 5. A strip-shaped protrusion 19 is fixedly connected to the side of the baffle 15 away from the pressing device 8, and the strip-shaped protrusion 19 is close to the bottom of the baffle 15. A handle groove is opened in the main body 2 corresponding to the middle position of the strip-shaped protrusion 19.

[0040] Two parallel second sliding grooves are vertically formed on the side of the U-shaped plate 81 opposite to the U-shaped cover 7. A second slider 82 is slidably installed in the second sliding groove. The part of the second slider 82 outside the second sliding groove is fixedly connected to the U-shaped cover 7. Limiting blocks 83 are fixedly connected to the two inner side walls of the U-shaped plate 81. A first limiting groove 84 and a second limiting groove 85 are formed horizontally and parallel to the position of the limiting block 83 on the side of the sub-body 3. The first limiting groove 84 is located above the second limiting groove 85, and an inclined groove 86 connects the first limiting groove 84 and the second limiting groove 85. The limiting block 83 can slide back and forth along the first limiting groove 84, the inclined groove 86 and the second limiting groove 85. The second limiting groove 85 is provided with a guide rod 87 at the end away from the insert 5. A pressure block 88 is fixedly connected to the end of the guide rod 87 near the pressing device 8. A spring 89 is sleeved on the guide rod 87 to drive the guide rod 87 and the pressure block 88 to slide toward the insert 5. The pressure block 88 is closer to the U-shaped plate 81 than the storage shell 6, and the side of the pressure block 88 near the U-shaped plate 81 is designed with an arc surface. The inclined groove 86 is inclined from top to bottom toward the direction away from the insert 5.

[0041] See Figure 1When the charger body 1 is not in use, the clamping device 8 is in the retracted state, and the first magnetic strip 16 on the baffle 15 and the second magnetic strip 17 on the U-shaped plate 81 are attracted together, so that the baffle 15, together with the U-shaped plate 81, the U-shaped cover 7 and the storage shell 6, completely surrounds the sub-body 3 of the charger body 1, and the insert 5 at the bottom of the sub-body 3 can also be protected by the above structure, thereby preventing debris from entering the storage slot;

[0042] When the charger body 1 is in use, see Figure 10 If the reserved space or support area of ​​the power strip 21 is large enough, the U-shaped plate 81 is pushed horizontally, so that the U-shaped plate 81 drives the U-shaped cover 7 and the limiting block 83 to move along the direction of the first sliding groove. The pressing device 8 is still in the retracted state. After the U-shaped cover 7 is retracted into the storage shell 6, the baffle 15 is retracted into the main body 2, so that the plug 5 can be exposed. After the plug 5 is turned out from the storage groove, the charger body 1 can be plugged into the power strip 21 for use.

[0043] See Figure 11 If the reserved space or support area of ​​the power strip 21 is insufficient, during the process of horizontally pushing the U-shaped plate 81 so that the U-shaped plate 81 drives the U-shaped cover 7 and the limiting block 83 to move along the direction of the first slide groove, when the U-shaped plate 81 drives the limiting block 83 to the position of the inclined groove 86, a downward pulling force can be manually applied to the U-shaped plate 81 so that the U-shaped plate 81 slides downward relative to the U-shaped cover 7. The limiting block 83 can enter the inclined groove 86 under the action of the pulling force, and then enter the second limiting groove 85. At this time, a height difference is generated between the U-shaped cover 7 and the U-shaped plate 81, and the pressing device 8 enters the extended state and continues to push the U-shaped plate 81 inward. Under the guidance of the first slider 9 and the first slide groove, the U-shaped cover 7 continues to be inserted into the storage shell 6. The U-shaped plate 81 is squeezed by the spring 89 under the guidance of the limiting block 83 and the second limiting groove 85 (it can be understood that at this time, the lower end of the U-shaped plate 81 protrudes from the lower surface of the storage shell 6).

[0044] When the limit block 83 reaches its maximum displacement, the current position of the U-shaped plate 81 is locked by hand. Then, the insert 5 is rotated out of the storage slot and inserted into the power strip 21. After the insert 5 is inserted, the U-shaped plate 81 is slowly released, so that it is gradually squeezed together with the side of the power strip 21 under the push of the spring 89. That is, the spring 89 pushes the U-shaped plate 81 to hold the power strip 21 from the side, thereby applying a supporting force to the suspended part of the charger body 1. When the suspended part of the charger body 1 deflects downward under the action of gravity, the supporting force can suppress the downward deflection trend of the suspended part of the charger body 1, thereby ensuring a stable connection between the charger body 1 and the power strip 21.

[0045] like Figure 5 and Figure 6As shown, the U-shaped cover 7 has a deflection groove with an opening facing the U-shaped plate 81 inside. A movable strip 10 is provided between the U-shaped plate 81 and the U-shaped cover 7. The movable strip 10 has a strip-shaped hole extending in the vertical direction. The second slider 82 passes through the movable strip 10. The movable strip 10 is not fixedly connected to the U-shaped cover 7 or the U-shaped plate 81. Therefore, the movable strip 10 can slide up and down relative to the U-shaped cover 7 and the U-shaped plate 81 under the limiting action of the second slider 82.

[0046] A telescopic rod 11 is provided inside the deflection groove. One end of the telescopic rod 11 is rotatably connected to the groove wall of the deflection groove, and the connection point is close to the bottom groove wall of the deflection groove. The other end of the telescopic rod 11 is inserted into the strip hole and rotatably connected to the strip hole, with the connection point located slightly above the middle of the movable strip 10. That is, the telescopic rod 11 is inclined upward towards the U-shaped plate 81. A support strip 12 is provided below the movable strip 10. The support strip 12 is fixedly connected to the side of the U-shaped plate 81 near the U-shaped cover 7, which can restrict the movable strip 10 from sliding to protrude from the bottom of the U-shaped plate 81.

[0047] As the U-shaped plate 81 moves along the inclined groove 86 towards the second limiting groove 85, the U-shaped plate 81 moves downward. Under the action of gravity and friction, the movable strip 10 moves downward with the U-shaped plate 81 (it should be noted that the displacement distance between the movable strip 10 and the U-shaped plate 81 may be different). During this process, the telescopic rod 11 gradually deflects downward and gradually shortens. When the telescopic rod 11 contacts the bottom wall of the deflection groove, the telescopic rod 11 stops deflecting, and the movable strip 10 also stops moving downward. At this time, the bottom of the movable strip 10 can be lower than the bottom of the U-shaped cover 7. When the U-shaped plate 81 drives the limiting block 83 into the second limiting groove 85... After step 5, the U-shaped plate 81 also stops moving downwards. At this time, more than half of the height of the U-shaped plate 81 can be aligned with the movable bar 10. As the U-shaped plate 81 presses against the spring 89 along the second limiting groove 85, the movable bar 10 can provide a large area of ​​support from the side of the U-shaped plate 81, so that the U-shaped plate 81 can maintain a good vertical state. Then, when the U-shaped plate 81 is pressed against the side of the plug bar 21 under the action of the spring 89, the U-shaped plate 81 can apply a more stable supporting force to the charger body 1 through the side of the plug bar 21, and prevent the U-shaped plate 81 from tilting due to the reaction force of the side of the plug bar 21.

[0048] When the charger body 1 is finished using and unplugged from the power strip 21, the U-shaped plate 81 is pulled outward, causing the limiting block 83 to return to the first limiting groove 84 along the second limiting groove 85 and the inclined groove 86 in sequence. During this process, the movable bar 10 can gradually return to its initial state under the support of the support bar 12 on the U-shaped plate 81.

[0049] like Figure 7As shown, the U-shaped plate 81 has two symmetrically arranged inclined grooves on the side away from the U-shaped cover 7 in the vertical direction, and the two inclined grooves are close to the two sides of the U-shaped plate 81. A trapezoidal strip 13 is slidably installed in the inclined groove. The thickness of the trapezoidal strip 13 gradually increases from top to bottom, and the side of the trapezoidal strip 13 away from the U-shaped cover 7 is located outside the inclined groove. The inclined surface of the trapezoidal strip 13 is opposite to and matches the inclined surface of the inclined groove. A groove is provided on the bottom wall of the inclined groove. A spring piece 14 is inclinedly fixedly connected in the groove, and the top of the spring piece 14 is always in contact with the bottom of the trapezoidal strip 13. The length of the trapezoidal strip 13 outside the inclined groove is equal to the maximum change of the trapezoidal strip 13 in the horizontal direction. Multiple anti-slip strips 20 are fixedly connected to the side of the trapezoidal strip 13 outside the inclined groove.

[0050] As the U-shaped plate 81 gradually presses against the side of the power strip 21, the trapezoidal strip 13, due to the reaction force of the power strip 21, begins to slide downwards along the inclined surface of the groove. During this process, the portion of the trapezoidal strip 13 outside the groove gradually enters the groove, while the spring piece 14 gradually enters the groove under the pressure of the trapezoidal strip 13. When the U-shaped plate 81 is completely pressed against the side of the power strip 21, the trapezoidal strip 13 also completely enters the groove. Since the spring piece 14 is in a compressed state at this time, it has an upward pushing force on the trapezoidal strip 13, causing the trapezoidal strip 13 to tend to move upwards. Therefore, the trapezoidal strip 13 can exert an upward pushing force on the U-shaped plate 81 through the inclined surface of the groove, thereby enabling the suspended portion of the charger body 1 to maintain a horizontal state better under the action of this pushing force, ensuring a stable connection between the charger body 1 and the power strip 21.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A charger comprising a charger body (1), characterized in that: The charger body (1) includes a main body (2) and a sub-body (3) at its bottom. The bottom area of ​​the sub-body (3) is smaller than the bottom area of ​​the main body (2). The top of the main body (2) is provided with a USB port (4). The bottom of the sub-body (3) is hinged with a plug (5). The bottom of the sub-body (3) is provided with a storage groove that matches the plug (5) at the position opposite to the plug (5). The bottom of the sub-body (3) is fixedly connected to a storage shell (6) at the end away from the insert (5). A U-shaped cover (7) is slidably inserted into the end of the storage shell (6) near the insert (5). A pressing device (8) is provided at the end of the U-shaped cover (7) near the insert (5). A first slider (9) is fixedly connected to the top of the U-shaped cover (7). A first groove is opened at the bottom of the main body (2) corresponding to the position of the first slider (9), and the first slider (9) is slidably installed in the first groove. The clamping device (8) has a retracted state flush with the U-shaped cover (7) and an extended state protruding from the lower surface of the U-shaped cover (7) to abut against the side of the plug bar. The pressing device (8) includes a U-shaped plate (81), both the U-shaped plate (81) and the U-shaped cover (7) are U-shaped, and two second sliding grooves are opened vertically on the opposite side of the U-shaped plate (81) and the U-shaped cover (7). A second slider (82) is slidably installed in the second sliding groove. The part of the second slider (82) outside the second sliding groove is fixedly connected to the U-shaped cover (7). Limiting blocks (83) are fixedly connected to the two inner side walls of the U-shaped plate (81). The side of the sub-body (3) is horizontally aligned with the position of the limiting block (83). A first limiting groove (84) and a second limiting groove (85) are provided in parallel. The first limiting groove (84) is located above the second limiting groove (85), and an inclined groove (86) connects the first limiting groove (84) and the second limiting groove (85). A guide rod (87) is provided at the end of the second limiting groove (85) away from the insert (5). A pressure block (88) is fixedly connected to the end of the guide rod (87). A spring (89) is sleeved on the guide rod (87) to drive the guide rod (87) and the pressure block (88) to slide toward the insert (5).

2. A charger according to claim 1, characterized in that: The U-shaped cover (7) has a deflection groove (71) with an opening facing the U-shaped plate (81) inside. A movable strip (10) is provided between the U-shaped plate (81) and the U-shaped cover (7). The movable strip (10) has a strip-shaped hole extending in the vertical direction. The second slider (82) passes through the movable strip (10). A telescopic rod (11) is provided in the deflection groove (71). One end of the telescopic rod (11) is rotatably connected to the groove wall of the deflection groove (71), and the connection point is close to the bottom groove wall of the deflection groove (71). The other end of the telescopic rod (11) is inserted into the strip-shaped hole and rotatably connected to the strip-shaped hole. The connection point is located in the upper middle part of the movable strip (10). The bottom of the two movable strips (10) is provided with the same support strip (12). The support strip (12) is fixedly connected to the side of the U-shaped plate (81) near the U-shaped cover (7).

3. A charger according to claim 2, characterized in that: Two inclined grooves are symmetrically opened in the vertical direction on the side of the U-shaped plate (81) away from the U-shaped cover (7), and the two inclined grooves are located at the two ends of the U-shaped plate (81). A trapezoidal strip (13) is slidably installed in the inclined groove. The thickness of the trapezoidal strip (13) gradually increases from top to bottom, and the side of the trapezoidal strip (13) away from the U-shaped cover (7) is located outside the inclined groove. The inclined surface of the trapezoidal strip (13) is opposite to and matches the inclined surface of the inclined groove. A groove is opened on the bottom wall of the inclined groove. A spring piece (14) is inclinedly fixedly connected in the groove, and the top of the spring piece (14) is always in contact with the bottom of the trapezoidal strip (13).

4. A charger according to claim 3, characterized in that: The main body (2) has a sliding baffle (15) at the bottom near the insert (5). A first magnetic strip (16) is fixedly connected to the side of the baffle (15) near the pressing device (8), and the first magnetic strip (16) is close to the bottom of the baffle (15). A second magnetic strip (17) is fixedly connected to the side of the pressing device (8) near the baffle (15), and the second magnetic strip (17) is close to the bottom of the pressing device (8). A third magnetic strip (18) for magnetic connection with the first magnetic strip (16) is fixedly connected to the side of the sub-body (3) near the baffle (15). The third magnetic strip (18) is located above the insert (5), and the magnetic poles of the third magnetic strip (18) and the first magnetic strip (16) are opposite magnetic poles, and the magnetic poles of the second magnetic strip (17) and the first magnetic strip (16) are opposite magnetic poles.

5. A charger according to claim 4, characterized in that: A strip protrusion (19) is fixedly connected to the side of the baffle (15) away from the pressing device (8). The strip protrusion (19) is close to the bottom of the baffle (15). The main body (2) has a handle groove at the position corresponding to the middle of the strip protrusion (19).

6. A charger according to claim 3, characterized in that: The length of the top and bottom edges of the trapezoidal strip (13) protruding outside the inclined groove is equal to the maximum change of the trapezoidal strip (13) in the horizontal direction, and multiple anti-slip strips (20) are fixedly connected to the side of the trapezoidal strip (13) outside the inclined groove.

7. A charger according to claim 5, characterized in that: The pressure block (88) is closer to the U-shaped plate (81) than the storage shell (6), and the side of the pressure block (88) closest to the U-shaped plate (81) is designed with an arc surface.

8. A charger according to claim 4, characterized in that: The inclined groove (86) is close to the side of the first limiting groove (84) near the insert (5), and the inclined groove (86) is inclined from top to bottom in a direction away from the third magnetic strip (18).

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