Charger with positioning clamping structure

Abstract

The utility model discloses a charger with positioning clamping structure relates to electrical fittings technical field, including first casing, second casing, mounting seat board and plug main part, is set up in first casing and holds recessed cavity, second casing clamping is installed on first casing, is set up in first casing and holds first clamping groove and second clamping groove, first clamping groove and second clamping groove are separately arranged in the both sides of the opening end symmetry of holding recessed cavity, and the first casing is close to holding recessed cavity one side and protrudes and holds first clamping groove and second clamping groove respectively corresponding first clamping block and second clamping block, and mounting seat board is installed on second casing, and plug main part rotation is installed in mounting seat board close to second casing one side. The utility model discloses through first clamping groove and second clamping groove and corresponding first clamping block and second clamping block, has improved the precision and stability of casing assembly, has reduced clearance and misplacement phenomenon, has improved internal space utilization ratio simultaneously, has reduced mould complexity and manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of electrical accessories technology, and in particular to a charger with a positioning snap-fit ​​structure. Background Technology

[0002] With the widespread use of portable electronic devices, chargers, as essential accessories, have seen increasing emphasis on their structural design and user experience. To improve portability and neatness, many chargers with retractable plugs have emerged on the market. These products typically consist of an upper and lower shell assembled into a complete casing. However, in traditional upper and lower shell assembly processes, there is a common problem of noticeable gaps or relative misalignment between the upper and lower shells after assembly. This not only seriously affects the product's appearance and user grip but also reflects inherent defects in its internal positioning structure. Currently, the industry's conventional solution is a structure of "positioning pins + positioning holes" supplemented by "stops + reverse stops." While this solution can limit the relative displacement of the casing to some extent, the positioning pins and positioning holes themselves have inherent tolerances. Under the cumulative error of multiple positioning features, it is still difficult to avoid significant gaps and misalignments after assembly. Furthermore, the positioning posts and supporting reinforcing ribs in this structure occupy a lot of space inside the shell. This not only encroaches on the area that could be used to arrange larger components or enhance heat dissipation design, thus limiting the development of the product towards miniaturization and high power density, but also further increases the manufacturing cost of the product due to the increased complexity of the mold structure. Utility Model Content

[0003] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a charger with a positioning snap-fit ​​structure. This solves the technical problems of existing charger housings relying on the cooperation of positioning pins and positioning holes, resulting in obvious assembly gaps and misalignments, low utilization of internal space, restrictions on product miniaturization, complicated mold structures, and high manufacturing costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This utility model discloses a charger with a positioning and snap-fit ​​structure, comprising: A first housing, wherein a receiving cavity is provided on the first housing; The second housing is disposed at the opening end of the accommodating cavity and snap-fitted onto the first housing. The first housing has a first snap-fit ​​groove and a second snap-fit ​​groove. The first snap-fit ​​groove and the second snap-fit ​​groove are respectively disposed on symmetrical sides of the opening end of the accommodating cavity, and the second snap-fit ​​groove is symmetrically arranged on both sides of the first snap-fit ​​groove. The second housing has a first snap-fit ​​block and a second snap-fit ​​block protruding on the side surface near the accommodating cavity, which are respectively corresponding to the first snap-fit ​​groove and the second snap-fit ​​groove. The mounting plate is installed on the side of the second housing near the first housing by fasteners, and a power conversion module is inserted into the accommodating cavity; The plug body is rotatably mounted on the mounting base plate near the second housing and electrically connected to the power conversion module. The plug body's insertion end passes through the second housing and extends to the outside. The second housing also has a storage groove adapted to the plug body's insertion end.

[0005] As a preferred embodiment, both the first and second snap-fit ​​slots are trapezoidal, and both the first and second snap-fit ​​blocks are trapezoidal column blocks.

[0006] As a preferred embodiment, the first housing is also provided with a clearance notch corresponding to the plug body insertion end. The clearance notch is located on both sides of the first snap-fit ​​groove, and the clearance notch corresponds one-to-one with the storage groove.

[0007] As a preferred embodiment, the accommodating cavity opening end is provided with a fitting sealing protrusion, the fitting sealing protrusion is disposed on both sides of the plug body symmetrically, the first housing is provided with fitting protrusions on both sides of the first snap-fit ​​groove and the second snap-fit ​​groove, and a plurality of fitting protrusions are arranged in a gap, the second housing is provided with a first fitting groove and a second fitting groove on the side of the second housing close to the first housing, which are respectively corresponding to the fitting sealing protrusion and the fitting protrusion.

[0008] As a preferred embodiment, the fitting sealing protrusion has a notch, and the multiple notches are arranged at equal intervals.

[0009] As a preferred embodiment, the cross-sections of the fitting sealing protrusion and the fitting protrusion are both isosceles triangles, and the cross-sections of the first fitting groove and the second fitting groove are both inverted isosceles triangles.

[0010] As a preferred embodiment, the second housing has a connecting seat protruding on the side near the first housing. The mounting plate is fixedly connected to the connecting seat via fasteners. The mounting plate has a mounting bracket protruding on the side near the connecting seat. The plug body includes a conductive plug piece, which is rotatably mounted on the mounting bracket via a rotating shaft. The conductive plug piece is electrically connected to the power conversion module via a conductive connecting plate. The connecting seat also has a fitting post protruding on the side near the mounting plate. The fitting post is located on both sides symmetrically opposite the fasteners. The conductive connecting plate has a fitting and fixing groove adapted to the fitting post. The connecting seat has a clearance groove corresponding to the conductive plug piece, which penetrates the second housing and communicates with the storage groove.

[0011] As a preferred embodiment, the power conversion module is installed in the accommodating cavity by connecting protrusions. The connecting protrusions are arranged on both sides of the accommodating cavity, and the connecting protrusions are provided with insertion grooves. Guide slopes are provided on both sides of the insertion grooves near the second housing.

[0012] As a preferred embodiment, the first housing is further provided with a plug-in interface on the side away from the second housing. The plug-in interface is connected to the receiving cavity, and a plug-in component is installed on the plug-in interface. A plurality of the plug-in components are electrically connected to the power conversion module.

[0013] As a preferred embodiment, the first housing is further provided with a fitting rim on the outer periphery near one end of the second housing, and the second housing is provided with an inset flange that matches the fitting rim on the outer periphery near one end of the receiving cavity.

[0014] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly replaces the traditional "positioning post + positioning hole" structure with a multi-point snap-fit ​​positioning system composed of a first snap-fit ​​groove, a second snap-fit ​​groove, and corresponding first snap-fit ​​blocks and second snap-fit ​​blocks. This effectively eliminates the obvious gaps and relative misalignments between shells caused by fit tolerances and cumulative errors during assembly, significantly improving the product's appearance quality and grip. At the same time, this compact snap-fit ​​structure saves the internal space occupied by the original positioning posts and reinforcing ribs, creating conditions for arranging higher-power components or optimizing heat dissipation design, strongly supporting the development of products towards miniaturization and high power density. In addition, the structural optimization simplifies the mold structure required for shell forming, significantly reducing manufacturing costs while improving product assembly quality and space utilization.

[0015] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a charger structure with a positioning snap-fit ​​structure according to an embodiment of this application; Figure 2 This is an exploded view of the charger portion structure with a positioning snap-fit ​​structure according to an embodiment of this application; Figure 3 This is an exploded view of a charger portion with a positioning snap-fit ​​structure from another perspective of an embodiment of this application. Figure 4 This is a schematic diagram of the first housing structure according to an embodiment of this application; Figure 5 This is an embodiment of the present application. Figure 2 Enlarged view of point A; Figure 6 This is an embodiment of the present application. Figure 2 Enlarged view of point B; Figure 7 This is an embodiment of the present application. Figure 2 Enlarged view at point C; Figure 8 This is an embodiment of the present application. Figure 3 Enlarged view of point D; Figure 9 This is an embodiment of the present application. Figure 3 Enlarged view at point E; Figure 10 This is an embodiment of the present application. Figure 4 Enlarged view of point F.

[0017] Explanation of reference numerals in the attached figures: 10. First housing; 11. Accommodating cavity; 12. First snap-fit ​​groove; 13. Second snap-fit ​​groove; 14. Clearance notch; 15. Fitting sealing protrusion; 151. Notch; 16. Fitting protrusion; 17. Connecting protrusion; 171. Insertion groove; 172. Guide slope; 18. Insertion interface; 19. Fitting perimeter; 20. Second housing; 21. First snap-fit ​​block; 22. Second snap-fit ​​block; 23. Storage slot; 24. First fitting groove; 25. Second fitting groove; 26. Connecting seat; 261. Fitting post; 262. Clearance groove; 27. Inset flange; 30. Mounting base plate; 31. Mounting bracket; 40. Fasteners; 50. Plug body; 51. Conductive connector; 52. Spindle; 60. Conductive connecting plate; 61. Fitting and fixing groove. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Please see Figures 1 to 10 This utility model provides a charger with a positioning and snap-fit ​​structure, including a first housing 10, a second housing 20, a mounting plate 30, and a plug body 50. The first housing 10 serves as the main support structure and has an accommodating cavity 11 for accommodating internal electronic components and providing a mounting base. The second housing 20 serves as an encapsulation cover plate, which is disposed at the opening end of the accommodating cavity 11 to achieve a tight fit with the first housing 10 to improve the appearance and snap-fit ​​onto the first housing 10, ensuring a firm connection and preventing relative displacement. The first housing 10 has a first snap-fit ​​groove 12 and a second snap-fit ​​groove 13, forming a multi-point snap-fit ​​positioning system to guide precise assembly. The first snap-fit ​​groove 12 and the second snap-fit ​​groove 13 are symmetrically located on both sides of the opening end of the accommodating cavity 11, and the symmetrical distribution balances the force and enhances the structural stability. The second snap-fit ​​groove 13 is symmetrically arranged on both sides of the first snap-fit ​​groove 12, further optimizing the positioning accuracy and preventing single-point stress concentration, while constructing a stable geometric constraint system to form a "triangular" stable structure. The second housing 20 has a first latching block 21 and a second latching block 22 protruding on the side near the receiving cavity 11, corresponding to the first latching groove 12 and the second latching groove 13, respectively. The block-groove fit enables quick installation and reduces tolerance accumulation. The mounting plate 30 is mounted on the side of the second housing 20 near the first housing 10 using fasteners 40, providing stable support for the plug body 50 and simplifying the internal layout. A power conversion module (not shown in the figure) is inserted into the receiving cavity 11, achieving a modular layout and improving space utilization. The plug body 50 serves as the power input interface, rotatably mounted on the mounting plate 30 near the second housing 20, allowing for retraction to improve portability and safety, while optimizing vertical space configuration. The plug body 50 is also electrically connected to the power conversion module (not shown in the figure), establishing a complete power conversion path. The plug end of the plug body 50 passes through the second housing 20 and extends to the outside, facilitating connection to an external power socket. The second housing 20 also has a storage slot 23 that is adapted to the plug end of the plug body 50, realizing a plug-in hidden design to improve portability and safety, safely storing the plug and keeping its appearance flat when not in use.

[0021] In this embodiment, please refer to Figure 5 , Figure 6 , Figure 9 and Figure 10 Both the first snap-fit ​​groove 12 and the second snap-fit ​​groove 13 are trapezoidal, and both the first snap-fit ​​block 21 and the second snap-fit ​​block 22 are trapezoidal column blocks. The trapezoidal structure is used to achieve a stable snap-fit.

[0022] In the preferred embodiment, both the first snap-fit ​​groove 12 and the second snap-fit ​​groove 13 are isosceles trapezoids, and both the first snap-fit ​​block 21 and the second snap-fit ​​block 22 are isosceles trapezoidal columnar blocks. Furthermore, both the first housing 10 and the second housing 20 are made of elastic plastic, and the fit between the first snap-fit ​​groove 12 and the first snap-fit ​​block 21, and the fit between the second snap-fit ​​groove 13 and the second snap-fit ​​block 22, are interference fits.

[0023] Please see Figure 2 The first housing 10 also has a clearance notch 14 corresponding to the plug end of the plug body 50, providing necessary swing and operation space for storage or use. The clearance notch 14 is set on both sides of the first snap-fit ​​groove 12, and the clearance notch 14 corresponds one-to-one with the storage groove 23, ensuring the symmetry and rationality of the structural layout and optimizing the space layout.

[0024] Please see Figure 6 The accommodating cavity 11 has a protruding fitting sealing strip 15 at its opening end, forming a continuous sealing barrier to improve the dustproof and foreign object intrusion prevention level of the housing. The fitting sealing strip 15 is arranged symmetrically on both sides of the plug body 50, providing focused protection for critical areas and maintaining the integrity of the appearance. The first housing 10 has a first snap-fit ​​groove 12 and a second snap-fit ​​groove 13, both sides of which are also provided with fitting protrusions 16. By increasing additional contact points, the rigidity of the overall structure is enhanced. The multiple fitting protrusions 16 are arranged with gaps, which helps guide alignment and distribute stress on the mating surfaces during assembly. Please refer to... Figure 8 and Figure 9 The second housing 20 is also provided with a first fitting groove 24 and a second fitting groove 25 on the side close to the first housing 10, which correspond to the fitting sealing protrusion 15 and the fitting protrusion 16 respectively, to realize multiple fitting sealing and positioning functions, and significantly reduce the gap and misalignment between the housings.

[0025] Furthermore, the fitting sealing protrusion 15 has a notch 151. This design allows the sealing protrusion to deform appropriately under pressure to compensate for manufacturing tolerances. Multiple notches 151 are arranged at equal intervals to achieve uniform stress release and ensure a balanced distribution of sealing pressure.

[0026] The cross-sections of the fitting sealing protrusion 15 and the fitting protrusion 16 are both in the shape of an isosceles triangle. The guiding characteristics of the triangular contour facilitate the alignment and introduction in the early stage of assembly. The cross-sections of the first fitting groove 24 and the second fitting groove 25 are both in the shape of an inverted isosceles triangle, which complements the shape of the protrusion to form a tight surface contact and effectively restrict the degrees of freedom in multiple directions.

[0027] Please see Figure 2 , Figure 3 , Figure 7 and Figure 8The second housing 20 has a connecting seat 26 protruding on the side near the first housing 10. The mounting plate 30 is fixedly connected to the connecting seat 26 by fasteners 40 to ensure a stable connection between the structural components. The mounting plate 30 has a mounting bracket 31 protruding on the side near the connecting seat 26, which is used to support and fix the rotating mechanism of the plug body 50. Specifically, the plug body 50 includes a conductive plug piece 51. As a conductive component that directly contacts the external power source, the conductive plug piece 51 is rotatably mounted on the mounting bracket 31 via a rotating shaft 52 to achieve a smooth switching between the storage and use states of the conductive plug piece 51. The conductive plug piece 51 is electrically connected to the power conversion module (not shown in the figure) through a conductive connecting plate 60 to form a low-impedance current path from the input to the power conversion module (not shown in the figure). The connecting seat 26 has a protruding fitting post 261 on the side near the mounting plate 30. The fitting post 261 is arranged symmetrically on both sides of the fastener 40. The symmetrical layout balances the positioning force and improves the connection stability. The conductive connecting plate 60 has a fitting and fixing groove 61 that matches the fitting post 261, which precisely limits the installation position of the conductive connecting plate 60 and avoids assembly misalignment and interference with surrounding components. The connecting seat 26 has a clearance groove 262 corresponding to the conductive plug 51, which provides an unobstructed physical channel for the rotation of the conductive plug 51. The clearance groove 262 passes through the second housing 20 and communicates with the storage groove 23, ensuring that the conductive plug 51 can move smoothly and be accurately positioned between the retracted position and the used position.

[0028] Furthermore, please refer to Figure 4 and Figure 6 The power conversion module (not shown in the figure) is inserted into the receiving cavity 11 via connecting protrusions 17, enabling rapid installation and precise positioning of the power conversion module (not shown in the figure). The connecting protrusions 17 are positioned on both symmetrical sides of the receiving cavity 11, ensuring even force distribution and stable installation of the power conversion module (not shown in the figure) through a symmetrical layout. The connecting protrusions 17 have insertion grooves 171, and guide slopes 172 are symmetrically provided on both sides of the insertion groove 171 near the second housing 20, facilitating initial alignment of the power conversion module (not shown in the figure) during insertion and preventing assembly interference.

[0029] On the side of the first housing 10 away from the second housing 20, a plug-in interface 18 is also provided. The plug-in interface 18 communicates with the receiving cavity 11. A connector (not shown in the figure) is installed on the plug-in interface 18, establishing a standardized electrical port for connection with external devices. Multiple connectors (not shown in the figure) are electrically connected to the power conversion module (not shown in the figure) to reliably output the converted electrical energy to the receiving device.

[0030] The first housing 10 is provided with a fitting flange 19 protruding on the outer periphery of one end near the second housing 20, which forms an external sealing and reinforcing structure at the junction of the housings. The second housing 20 is provided with an inlaid flange 27 protruding on the outer periphery of one end near the receiving cavity 11, which is adapted to the fitting flange 19. The flange 27 and the fitting flange 19 cooperate to form a tightly fitting sealing structure, which effectively improves the overall dustproof and waterproof performance and appearance integrity.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A charger with a positioning snap-fit ​​structure, characterized in that, include: A first housing (10) is provided with a receiving cavity (11); The second housing (20) is disposed at the opening end of the accommodating cavity (11) and snapped onto the first housing (10). The first housing (10) is provided with a first snap-fit ​​groove (12) and a second snap-fit ​​groove (13). The first snap-fit ​​groove (12) and the second snap-fit ​​groove (13) are respectively disposed on both sides of the opening end of the accommodating cavity (11), and the second snap-fit ​​groove (13) is symmetrically arranged on both sides of the first snap-fit ​​groove (12). The second housing (20) is provided with a first snap-fit ​​block (21) and a second snap-fit ​​block (22) on the side of the second housing (20) near the accommodating cavity (11), which are respectively corresponding to the first snap-fit ​​groove (12) and the second snap-fit ​​groove (13). The mounting plate (30) is mounted on the side of the second housing (20) near the first housing (10) by fasteners (40), and a power conversion module is inserted into the accommodating cavity (11); The plug body (50) is rotatably mounted on the mounting base plate (30) on the side near the second housing (20) and electrically connected to the power conversion module. The plug end of the plug body (50) passes through the second housing (20) and extends to the outside. The second housing (20) is also provided with a storage groove (23) that is adapted to the plug end of the plug body (50).

2. The charger with a positioning and snap-fit ​​structure according to claim 1, characterized in that: Both the first snap-fit ​​groove (12) and the second snap-fit ​​groove (13) are trapezoidal, and both the first snap-fit ​​block (21) and the second snap-fit ​​block (22) are trapezoidal column blocks.

3. The charger with a positioning and snap-fit ​​structure according to claim 1, characterized in that: The first housing (10) is also provided with a clearance notch (14) corresponding to the plug end of the plug body (50). The clearance notch (14) is provided on both sides of the first snap-fit ​​groove (12), and the clearance notch (14) corresponds to the storage groove (23) one by one.

4. The charger with a positioning and snap-fit ​​structure according to claim 1, characterized in that: The accommodating cavity (11) has a protruding fitting sealing strip (15) at its opening end. The fitting sealing strip (15) is disposed on both sides of the plug body (50). The first housing (10) has a first snap-fit ​​groove (12) and a second snap-fit ​​groove (13) on both sides, and a fitting protrusion (16) is also provided. The multiple fitting protrusions (16) are arranged in a gap. The second housing (20) has a first fitting groove (24) and a second fitting groove (25) on the side close to the first housing (10) that correspond to the fitting sealing strip (15) and the fitting protrusion (16) respectively.

5. The charger with a positioning and snap-fit ​​structure according to claim 4, characterized in that: The fitting sealing protrusion (15) has a notch (151), and the multiple notches (151) are arranged at equal intervals.

6. The charger with a positioning and snap-fit ​​structure according to claim 4, characterized in that: The cross-sections of the fitting sealing protrusion (15) and the fitting protrusion (16) are both in the shape of an isosceles triangle, and the cross-sections of the first fitting groove (24) and the second fitting groove (25) are both in the shape of an inverted isosceles triangle.

7. The charger with a positioning and snap-fit ​​structure according to claim 1, characterized in that: The second housing (20) has a connecting seat (26) protruding on the side near the first housing (10). The mounting plate (30) is fixedly connected to the connecting seat (26) by the fastener (40). The mounting plate (30) has a mounting bracket (31) protruding on the side near the connecting seat (26). The plug body (50) includes a conductive plug piece (51). The conductive plug piece (51) is rotatably mounted on the mounting bracket (31) by a rotating shaft (52). The conductive plug piece (51) is connected to the first housing (10) by a conductive connecting plate (60). The power conversion module is electrically connected. The connecting seat (26) has a protruding fitting post (261) on the side near the mounting plate (30). The fitting post (261) is arranged on both sides of the fastener (40). The conductive connecting plate (60) has a fitting and fixing groove (61) adapted to the fitting post (261). The connecting seat (26) has a clearance groove (262) corresponding to the conductive plug (51). The clearance groove (262) penetrates the second housing (20) and communicates with the storage groove (23).

8. The charger with a positioning snap-fit ​​structure according to claim 1, characterized in that: The power conversion module is installed in the accommodating cavity (11) by connecting protrusion (17). The connecting protrusion (17) is arranged on both sides of the accommodating cavity (11). The connecting protrusion (17) is provided with a plug groove (171). The plug groove (171) is provided with guide slopes (172) on both sides of the end near the second housing (20).

9. The charger with a positioning and snap-fit ​​structure according to claim 1, characterized in that: The first housing (10) is provided with a plug-in interface (18) on the side away from the second housing (20). The plug-in interface (18) is connected to the accommodating cavity (11). A plug-in component is installed on the plug-in interface (18), and multiple plug-in components are electrically connected to the power conversion module.

10. The charger with a positioning and snap-fit ​​structure according to claim 1, characterized in that: The first housing (10) is provided with a fitting rim (19) protruding on the outer periphery of one end near the second housing (20), and the second housing (20) is provided with an inlaid flange (27) that matches the fitting rim (19) protruding on the outer periphery of one end near the receiving cavity (11).

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