A three-pin interchangeable head detachable structure power charger

Abstract

The utility model discloses a three PIN detachable structure's power supply charger of replaceable head, including charger main part, end cover and three PIN replaceable head, be equipped with assembly slot on end cover, its one end opening, the other end is equipped with hollow boss part, three PIN replaceable head includes fixed plate, a plurality of pin and first sliding slot, is equipped with limit hole on boss part two side walls, is equipped with U shape elastic joint spare in boss part, and the two arms middle part of U shape elastic joint spare all integrative forming has movable buckle, is equipped with the reverse buckle on first sliding slot inner wall, and the both ends top surface of U shape elastic joint spare is first inclined plane, still be equipped with unlocking spare in boss part, including two insertion rod, connecting rod and spring, and the baffle fixed in boss part is connected to the one end of spring relative to the connecting rod far away, and the outer side of connecting rod is fixed with the button of movable wear through end cover side wall, can replace different specifications three PIN replaceable head according to user demand and use, and simple structure, low in production cost, simple operation, and the overall volume is small, and light in weight, convenient to carry.

Description

Technical Field

[0001] This utility model belongs to the technical field of power chargers, specifically relating to a power charger with a three-pin replaceable and detachable head structure. Background Technology

[0002] Because charger interface specifications differ and are incompatible between different countries and regions, users need to carry multiple chargers of the same specifications when traveling or on business trips abroad, increasing the size and weight of their luggage and making it inconvenient to store. Although existing multi-purpose chargers can reduce the number of chargers to carry by integrating multiple retractable plugs or foldable multi-interfaces, they generally suffer from defects such as complex structure, large size, and heavy weight, making it difficult to meet users' needs for lightweight and portable designs. Moreover, the complex structure leads to high manufacturing costs, which in turn increases the user's operating costs. Utility Model Content

[0003] The purpose of this utility model is to provide a power charger with a three-pin replaceable and detachable head structure to address the above-mentioned problems.

[0004] This utility model is achieved through the following technical solution: a power charger with a three-pin replaceable and detachable head, comprising a charger body, an end cover fixedly installed on the top of the charger body, and a three-pin replaceable head. The end cover has a mounting groove, one end of which has an opening, and the other end has a hollow protrusion extending in the sliding direction toward the opening. The three-pin replaceable head includes a fixing plate, several pins passing through the fixing plate, and a first sliding groove extending downward from the bottom surface of the fixing plate for mounting and fixing with the protrusion. Limiting holes are formed on both side walls of the protrusion, and a U-shaped elastic snap-fit ​​is installed inside the protrusion. The middle of the two arms of the U-shaped elastic snap-fit... All are integrally formed with movable buckles. The two movable buckles extend outward from the limiting hole in opposite directions. The inner wall of the first slide groove is provided with a buckle for engaging and fixing the movable buckles. The top surfaces of both ends of the U-shaped elastic snap-fit ​​are first inclined surfaces. The angle between the first inclined surface and the inner wall of the protrusion is less than 90 degrees. The protrusion is also provided with an unlocking component. The unlocking component includes two insert rods, a connecting rod connecting the two insert rods, and a spring fixed to the inner side of the connecting rod. The end of the spring that is away from the connecting rod is connected to a baffle. The baffle is fixed in the protrusion. The connecting rod that is away from the spring has a button fixed to the outer side. The button moves through the side wall of the end cover and protrudes outward.

[0005] Furthermore, the top surface of the insertion rod is provided with a second inclined surface, and the sum of the inclination angles of the second inclined surface and the first inclined surface relative to the inner wall of the protrusion is 180 degrees.

[0006] Furthermore, the baffle is provided with a reinforcing rib and a fixing block on the side of the baffle that is relatively away from the spring, and the extending direction of the reinforcing rib is on the same straight line as the central axis of the spring.

[0007] Furthermore, two conductive sheets for connecting the upper and lower surfaces of the assembly groove are fixedly installed inside the assembly groove. The two conductive sheets are located on both sides of the protrusion. The inner walls of the first sliding groove on the bottom surface of the three-PIN replaceable head are provided with second sliding grooves that cooperate with the conductive sheets. The end of the second sliding groove is limited and correspondingly connected to the pins of the three-PIN replaceable head.

[0008] Furthermore, the inner wall of the assembly groove is provided with a limiting strip extending along the sliding direction, and the outer wall of the first slide groove of the three-PIN replaceable head is provided with a limiting groove for use with the limiting strip.

[0009] Furthermore, a grounding hole is provided at one end of the protrusion near the opening. The grounding hole extends from the end of the protrusion toward the top surface of the protrusion to form an elongated hole that connects to the interior of the protrusion. A grounding spring is correspondingly provided inside the protrusion below the grounding hole.

[0010] Furthermore, the protrusion is provided with a partition plate inside, which divides the interior of the protrusion into two accommodating spaces: a first accommodating space for assembling the U-shaped elastic snap-fit ​​and the unlocking component, and a second accommodating space for assembling the grounding spring. The second accommodating space is connected to the outer surface of the protrusion through a grounding pin hole.

[0011] Furthermore, the grounding spring includes a fixed frame that is abutted against the inner wall of the second receiving space and two elastic clips that are integrally formed by bending inward from the middle of the fixed frame near the opening. The two elastic clips are exposed in the grounding hole, and the distance between the two elastic clips gradually decreases in the direction away from the opening.

[0012] Furthermore, the fixing plate of the three-PIN replaceable head is provided with integrally formed extension plates on both sides, and the end cover is provided with corresponding mounting steps. The height difference transition position of the mounting steps is provided with an arc-shaped connecting surface. One end of the lower surface of the extension plate is provided with an arc-shaped inclined surface that fits the arc-shaped connecting surface. The thickness of the extension plate is the same as the height difference value of the mounting steps.

[0013] This utility model adopts a three-pin replaceable head and a detachable end cap structure, which can replace the three-pin replaceable head of different specifications according to user needs. It has a simple structure, low production cost, simple operation, high disassembly and assembly efficiency, small overall size, light weight, and easy portability. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-PIN replaceable head disassembly state of this utility model; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a top-view structural diagram of the end cap of this utility model; Figure 5 This is a top-view structural diagram of the three-PIN replaceable head in this utility model; Figure 6 This is a top view structural diagram of the three-PIN replaceable head and end cap in this utility model.

[0015] The attached figures are labeled as follows: 1. Charger body; 2. End cap; 21. Mounting step; 22. Arc-shaped connecting surface; 3. Assembly slot; 31. Opening; 32. Protrusion; 321. Limiting hole; 322. Baffle; 323. Reinforcing rib; 324. Fixing block; 325. Grounding hole; 33. Conductive sheet; 34. Limiting strip; 35. Divider plate; 4. Three-PIN replaceable head; 41. Fixing plate; 411. Extension plate; 412. Arc-shaped bevel; 42. Pin; 43. First slide groove; 431. Inverted buckle; 432. Second slide groove; 433. Limiting groove; 5. U-shaped elastic snap-fit; 51. Movable snap-fit; 52. First bevel; 6. Unlocking component; 61. Insert rod; 611. Second bevel; 62. Connecting rod; 621. Button; 63. Spring; 7. Grounding spring; 71. Fixing frame; 72. Elastic clip. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to specific examples and accompanying drawings.

[0017] like Figures 1-6As shown, this utility model describes a power charger with a three-pin replaceable and detachable head structure, including a charger body 1, an end cover 2 fixedly installed on the top of the charger body 1, and a three-pin replaceable head 4. The end cover 2 is provided with a mounting groove 3, one end of which has an opening 31, and the other end extends along the sliding direction toward the opening 31 with a hollow protrusion 32. The three-pin replaceable head 4 includes a fixing plate 41, a plurality of pins 42 passing through the fixing plate 41, and a first sliding groove 43 extending downward from the bottom surface of the fixing plate 41 for mounting and fixing with the protrusion 32. Limiting holes 321 are provided on both side walls of the protrusion 32. A U-shaped elastic snap fastener 5 is installed inside the protrusion 32. The middle of each arm of the U-shaped elastic snap fastener 5 is integrally formed with a movable buckle 51. The movable buckle 51 extends outward from the limiting hole 321 in opposite directions. The inner wall of the first slide groove 43 is provided with a buckle 431 for engaging and fixing the movable buckle 51. The top surfaces of both ends of the U-shaped elastic snap fastener 5 are first inclined surfaces 52. The angle between the first inclined surface 52 and the inner wall of the protrusion 32 is less than 90 degrees. The protrusion 32 is also provided with an unlocking component 6. The unlocking component 6 includes two insert rods 61, a connecting rod 62 connecting the two insert rods 61, and a spring 63 fixedly abutting the inner side of the connecting rod 62. The end of the spring 63 that is away from the connecting rod 62 is connected to a baffle 322. The baffle 322 is fixed inside the protrusion 32. The outer side of the connecting rod 62 that is away from the spring 63 is fixed with a button 621. The button 621 movably passes through the side wall of the end cover 2 and protrudes outward.

[0018] In the absence of external pressure, the U-shaped elastic snap fastener 5 is in its unfolded state, with the movable buckles 51 on its two arms extending outward through the limiting holes 321 and protruding from the outer side wall of the protrusion 32. When installing the three-pin replaceable head 4, the three-pin replaceable head 4 is pushed into the assembly groove 3 from the opening 31, causing the protrusion 32 to slide into the first sliding groove 43. As the three-pin replaceable head 4 is further pushed, when the buckle 431 on the inner wall of the first sliding groove 43 abuts against the movable buckle 51, the buckle 431 applies pressure to the movable buckle 51, causing both arms of the U-shaped elastic snap fastener 5 to deform inward. As a result, the movable buckle 51 retracts back into the limiting hole 321, allowing the buckle 431 to continue moving through the limiting hole 321. After the buckle 431 is completely misaligned with the limiting hole 321, the U-shaped elastic snap fastener 5 automatically returns to its original position under its own elasticity. In the first state, the movable buckle 51 extends out of the limiting hole 321 and limits the movement of the inverted buckle 431, thereby fixing the three-pin replaceable head 4 to the end cover 2. To remove the three-pin replaceable head 4 from the end cover 2, press the button 621 to drive the insertion rod 61 to be inserted between the first inclined surface 52 and the inner wall of the protrusion 32. As the insertion rod 61 moves further, the two arms of the U-shaped elastic snap fastener 5 deform and drive the movable buckle 51 to retract. At this time, push the three-pin replaceable head 4 towards the opening 31 to complete the removal. When the button 621 is pressed, the spring 63 is squeezed and contracted. After the removal is completed, release the button 621, and the spring 63 automatically resets and drives the insertion rod 61 to reset. The movable buckle 51 returns to its initial state. The operation is simple, the disassembly and assembly efficiency is high, the structure is simple, the production cost is low, the overall size is small, the weight is light, and it is easy to carry.

[0019] To avoid the lag caused by button 621 affecting the user experience, such as Figure 4 As shown, in this embodiment of the present invention, the top surface of the insertion rod 61 is provided with a second inclined surface 611. The sum of the inclination angles of the second inclined surface 611 and the first inclined surface 52 relative to the inner wall of the protrusion 32 is 180 degrees, while the included angle between the first inclined surface 52 and the inner wall of the protrusion 32 is less than 90 degrees. Therefore, the gap between the top surface of the U-shaped elastic snap-fit ​​5 and the inner wall of the protrusion 32 is similar to a V-shape. The sharp top surface of the insertion rod 61 can be easily inserted between the U-shaped elastic snap-fit ​​5 and the inner wall of the protrusion 32 through the V-shaped gap, which can reduce the force required to unlock and improve the sensitivity of the button 621.

[0020] like Figure 4As shown, in this embodiment of the invention, the side of the baffle 322 furthest from the spring 63 is provided with a reinforcing rib 323 and a fixing block 324 in sequence. The extending direction of the reinforcing rib 323 is on the same straight line as the central axis of the spring 63. The baffle 322 itself is fixed inside the protrusion 32 to fix and abut against one end of the spring 63. Due to the limitation of the installation space, its thickness and volume are not too large. However, long-term pressure from the spring 63 can easily cause uneven stress at the connection between the baffle 322 and the inner wall of the protrusion 32, leading to deformation or even breakage. The automatic rebound of button 621 is poorly affected, and the only way to repair it is to replace the entire end cover 2, which is costly. In this embodiment of the utility model, a reinforcing rib 323 is set. The support center point of the reinforcing rib 323 on one side of the baffle 322 is on the same straight line as the force center point of the spring 63 on the other side of the baffle 322. The reinforcing rib 323 is fixed by the fixing block 324, so that the force is evenly distributed on both sides of the baffle 322, which can avoid the pulling force on the inner wall connection of the other protrusions 32 and ensure the service life of the product.

[0021] like Figure 6 As shown, in this embodiment of the present invention, two conductive sheets 33 for connecting the upper and lower surfaces of the assembly groove 3 are fixedly installed inside the assembly groove 3. The two conductive sheets 33 are respectively located on both sides of the protrusion 32. The inner walls of the first sliding groove 43 on the bottom surface of the three-pin replaceable head 4 are provided with second sliding grooves 432 for use with the conductive sheets 33. The end of the second sliding groove 432 is limited and correspondingly connected to the pin 42 of the three-pin replaceable head 4. When the three-pin replaceable head 4 is aligned and installed with the assembly groove 3, the conductive sheet 33 can slide into the second sliding groove 432 until the end of the second sliding groove 432 stops sliding. The upper end of the conductive sheet 33 abuts against the pin 42 of the three-pin replaceable head 4 at this point. The conductive sheet 33 is connected to the PCB board inside the charger body 1 through the wire. Thus, after power is applied, the three-pin replaceable head 4 and the charger body 1 can be electrically connected through the conductive sheet 33, and the connection stability is good.

[0022] Most existing chargers use plastic for their casings. The three-pin interchangeable connector 4 slides horizontally into the assembly slot 3, where it is secured by the deformation stress inherent in the plastic. However, this method is laborious and inefficient. Furthermore, frequent replacement of the connector with different specifications can cause wear on the plastic contact surfaces, leading to decreased connection stability. Therefore, the charger in this invention employs an additional limiting structure to stabilize the connection. Specifically, the inner wall of the assembly slot 3 has a limiting strip 34 extending along the sliding direction, and the outer wall of the first sliding groove 43 of the three-pin interchangeable connector 4 has a limiting groove 433 that works in conjunction with the limiting strip 34. When the three-pin interchangeable connector 4 slides horizontally into the assembly slot 3 and is assembled, the limiting strip 34 is fully engaged in the limiting groove 433, restricting the vertical movement of the three-pin interchangeable connector 4, enhancing connection stability, preventing the three-pin interchangeable connector 4 and the end cap 2 from becoming loose and causing poor contact, and ensuring easy assembly without affecting the product's lifespan even with frequent disassembly and assembly.

[0023] like Figure 4 and Figure 6 As shown, in this embodiment of the present invention, a grounding hole 325 is provided at one end of the protrusion 32 near the opening 31 of the assembly groove 3. The grounding hole 325 extends from the end of the protrusion 32 toward the top surface of the protrusion 32 to form an elongated hole that connects to the inside of the protrusion 32. A grounding spring 7 is correspondingly provided inside the protrusion 32 below the grounding hole 325. By setting the grounding spring 7, the grounding pin in the three-PIN replaceable head 4 pins 42 is connected to ensure the electrical safety of the charger during use.

[0024] Regarding the design of the hollow structure of the protrusion 32, such as Figure 4 As shown, to avoid low installation efficiency due to unclear assembly areas, the protrusion 32 in this embodiment of the present invention is provided with a partition plate 35. The partition plate 35 divides the interior of the protrusion 32 into two accommodating spaces: a first accommodating space for assembling the U-shaped elastic snap-fit ​​5 and the unlocking piece 6, and a second accommodating space for assembling the grounding spring 7. The second accommodating space is connected to the outer surface of the protrusion 32 through the foot socket 325. This reasonably optimizes the internal space of the protrusion 32, so that the protruding structure of the protrusion 32 itself can cooperate with the first sliding groove 43 to achieve snap-fit, while its interior is hollow and the corresponding structure is separated without wasting space, which can reduce the weight of the extra shell, and the internal structure is compact, which is conducive to product miniaturization.

[0025] Regarding the specific structure of the grounding spring 7, as follows: Figure 4As shown, the grounding spring 7 in this embodiment of the present invention includes a fixed frame 71 that is abutted against the inner wall of the second receiving space and two elastic clips 72 that are integrally formed by bending inward from the middle of the fixed frame 71 near the opening 31. The two elastic clips 72 are exposed in the grounding pin hole 325, and the distance between the two elastic clips 72 gradually decreases in the direction away from the opening 31. That is, when the grounding pin on the three-pin interchangeable head 4 is inserted into the grounding pin hole 325 from one end of the protrusion 32 and then slides in the grounding pin hole 325, the grounding pin on the three-pin interchangeable head 4 gradually contacts and abuts against the two elastic clips 72 in the grounding pin hole 325, so that the minimum distance between the two elastic clips 72 increases. At this time, the connection bend between the elastic clips 72 and the fixed frame 71 undergoes elastic deformation. The deformation stress makes the two elastic clips 72 always tightly abut against the grounding pin. The grounding spring 7 is connected to the PCB board in the charger body 1 through the wire, thereby realizing grounding.

[0026] like Figure 5 and Figure 6 As shown, in this embodiment of the present invention, the fixing plate 41 of the three-PIN replaceable head 4 is provided with integrally formed extension plates 411 on both sides. The end cover 2 is provided with a corresponding mounting step 21. The mounting step 21 has an arc-shaped connecting surface 22 at the height difference transition position. One end of the lower surface of the extension plate 411 is provided with an arc-shaped inclined surface 412 that fits the arc-shaped connecting surface 22. The thickness of the extension plate 411 is the same as the height difference of the mounting step 21. When the three-PIN replaceable head 4 is completely fixedly installed on the cover plate, the extension plates 411 on both sides are completely fitted and embedded in the mounting step 21. The upper surfaces of the extension plates 411 and the fixing plate 41 are kept horizontal with the upper surface of the end cover 2. This maintains the overall flatness and aesthetics, and increases the coverage area of ​​the three-PIN replaceable head 4 on the top surface of the end cover 2, thereby enhancing the protection of the connection structure between the two.

[0027] The above embodiments are merely preferred embodiments of the present utility model and are only used to explain the present utility model, not to limit the present utility model. Any changes, substitutions, combinations, simplifications, modifications, etc., made by those skilled in the art without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A power charger with a three-pin replaceable and detachable head, characterized in that: The charger includes a main body (1), an end cap (2) fixedly mounted on the top of the main body (1), and a three-pin interchangeable head (4). The end cap (2) is provided with a mounting groove (3). One end of the mounting groove (3) is provided with an opening (31), and the other end is provided with a hollow protrusion (32) extending in the sliding direction. The three-pin interchangeable head (4) includes a fixing plate (41), a number of pins (42) passing through the fixing plate (41), and a first sliding groove (43) extending downward from the bottom surface of the fixing plate (41) for mounting and fixing with the protrusion (32). Limiting holes (321) are provided on both sides of the protrusion (32). A U-shaped elastic snap fastener (5) is installed inside the protrusion (32). The middle of the two arms of the U-shaped elastic snap fastener (5) is integrally formed with a movable buckle (51). The two movable buckles (51) extend from the limiting holes (321) in opposite directions. The first groove (43) extends outward, and the inner wall of the first groove (43) is provided with a buckle (431) for engaging and fixing with the movable buckle (51). The top surfaces of the two ends of the U-shaped elastic snap fastener (5) are first inclined surfaces (52). The angle between the first inclined surface (52) and the inner wall of the protrusion (32) is less than 90 degrees. The protrusion (32) is also provided with an unlocking component (6). The unlocking component (6) includes two insert rods (61), a connecting rod (62) connected between the two insert rods (61), and a spring (63) fixed to the inner side of the connecting rod (62). The end of the spring (63) that is relatively away from the connecting rod (62) is connected to a baffle (322). The baffle (322) is fixed in the protrusion (32). The outer side of the connecting rod (62) that is relatively away from the spring (63) is fixed with a button (621). The button (621) moves through the side wall of the end cover (2) and protrudes outward.

2. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 1, characterized in that: The top surface of the insertion rod (61) is provided with a second inclined surface (611), and the sum of the inclination angles of the second inclined surface (611) and the first inclined surface (52) relative to the inner wall of the protrusion (32) is 180 degrees.

3. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 1, characterized in that: The baffle (322) is provided with a reinforcing rib (323) and a fixing block (324) on the side away from the spring (63) in sequence. The extending direction of the reinforcing rib (323) is on the same straight line as the central axis of the spring (63).

4. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 1, characterized in that: Two conductive sheets (33) for connecting the upper and lower surfaces of the assembly groove (3) are fixedly installed inside the assembly groove (3). The two conductive sheets (33) are located on both sides of the protrusion (32). The inner walls of the first groove (43) on the bottom surface of the three-PIN replaceable head (4) are provided with second grooves (432) for use with the conductive sheets (33). The end of the second groove (432) is limited and correspondingly connected to the pin (42) of the three-PIN replaceable head (4).

5. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 1, characterized in that: The inner wall of the assembly groove (3) is provided with a limiting strip (34) extending in the sliding direction, and the outer wall of the first slide groove (43) of the three-PIN replaceable head (4) is provided with a limiting groove (433) that works in conjunction with the limiting strip (34).

6. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 1, characterized in that: The protrusion (32) has a grounding hole (325) at one end near the opening (31). The grounding hole (325) extends from the end of the protrusion (32) toward the top surface of the protrusion (32) to form an elongated hole that connects to the inside of the protrusion (32). A grounding spring (7) is correspondingly provided inside the protrusion (32) below the grounding hole (325).

7. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 6, characterized in that: The protrusion (32) is provided with a partition plate (35) inside, which divides the interior of the protrusion (32) into two accommodating spaces: a first accommodating space for assembling the U-shaped elastic snap-fit ​​(5) and the unlocking piece (6), and a second accommodating space for assembling the grounding spring (7). The second accommodating space is connected to the outer surface of the protrusion (32) through the grounding hole (325).

8. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 7, characterized in that: The grounding spring (7) includes a fixed frame (71) that is attached to the inner wall of the second receiving space and two elastic clips (72) that are integrally formed by bending inward from the middle of the fixed frame (71) near the opening (31). The two elastic clips (72) are exposed in the grounding hole (325), and the distance between the two elastic clips (72) gradually decreases in the direction away from the opening (31).

9. A power charger with a detachable three-pin interchangeable head (4) structure according to claim 1, characterized in that: The fixing plate (41) of the three-PIN replaceable head (4) has integrally formed extension plates (411) on both sides. The end cap (2) is provided with a corresponding mounting step (21). The mounting step (21) has an arc-shaped connecting surface (22) at the height difference transition position. The lower surface of the extension plate (411) has an arc-shaped inclined surface (412) that fits the arc-shaped connecting surface (22). The thickness of the extension plate (411) is the same as the height difference of the mounting step (21).

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