Power adapter

Abstract

The utility model relates to a power adapter. The power adapter comprises: a housing part provided with a plurality of bayonets; the circuit component is accommodated in the shell component; a plurality of connecting cables; one connecting cable passes through one bayonet and is electrically connected with the circuit component; wherein an elastic net tail is arranged at the joint of the connecting cable and the circuit component; the elastic net tail is in interference fit with the bayonet; and at least one part of the edge of the bayonet is also provided with an extrusion part which extends towards the direction close to the elastic net tail. According to the power adapter, the waterproof performance of the power adapter can be effectively improved by utilizing the interference fit between the elastic tail part and the bayonet and the additionally arranged extrusion part, and the sealing structure does not need to use a silica gel ring, so that the cost can be further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, in particular to a power adapter. Background Art

[0002] The power adapter is a power supply and charging device for electronic devices or electronic instruments. It is generally composed of a shell (usually an upper shell and a lower shell sealed together to protect the internal components), a PCB (Printed Circuit Board), an input cable, and an output cable. The power adapter needs to be waterproof and dustproof to ensure that the PCB board housed in the shell is not damaged and to avoid the risk of short circuit.

[0003] The traditional power adapter assembles a PCB board with an input cable and a DC (Direct Current) output cable into the upper and lower shells, and fixes the PCB by ultrasonic welding. This structural design results in a large gap between the input cable, DC output cable and the shell, resulting in poor waterproof performance and easily causing safety accidents.

[0004] In order to improve the waterproof performance, some power adapters are provided with sealing rings (for example, silicone rings) between the input cable and the output cable and the housing to achieve a sealing effect. However, such power adapters have the disadvantages of high assembly cost and complicated assembly method.

[0005] Some other power adapters also use a method called "glue filling" to improve the sealing effect. It mainly buries the entire power adapter in glue after assembly, and then fills the gap with glue to achieve the waterproof effect of the power adapter. However, this glue filling method also has the problem of high implementation cost. Utility Model Content

[0006] The power adapter of the present application aims to solve the defect that the existing power adapter has high cost in waterproofing.

[0007] The embodiment of the utility model provides a power adapter. The power adapter comprises: a shell component with a plurality of bayonet ports; a circuit component housed inside the shell component; a plurality of connecting cables; one connecting cable passes through one bayonet port and is electrically connected to the circuit component; wherein an elastic net tail is provided at the connection between the connecting cable and the circuit component; the elastic net tail is interference-fitted with the bayonet port; and at least a portion of the edge of the bayonet port is also provided with an extrusion portion extending toward the direction close to the elastic net tail.

[0008] In some embodiments, the shell component includes: a first shell and a second shell that are sealed and connected; wherein, on the contact surface between the first shell and the second shell, the first shell is provided with a retaining groove; the second shell is provided with a retaining bone that is adapted to the retaining groove; and the retaining bone is confined in the retaining groove.

[0009] In some embodiments, the net tail includes: a clamping portion; a clamping slot matched with the clamping portion is formed on the first shell; wherein the clamping portion is clamped in the clamping slot.

[0010] In some embodiments, the second shell is provided with a notch; the notch and the card slot are combined to form the card slot; wherein a protruding compression bone is provided in the notch to form the extrusion portion.

[0011] In some embodiments, the cross-sectional shape of the compression bone is triangular; wherein the clamping portion is elastic and, under the squeezing of the compression bone, forms a sealing groove that is sealingly engaged with the compression bone.

[0012] In some embodiments, the elastic net tail also includes: a first shielding portion extending along the radial direction of the connecting cable; wherein, when the clamping portion is clamped in the clamping slot, the first shielding portion abuts against the outer surface of the first shell so that at least a portion of the clamping port is blocked.

[0013] In some embodiments, the elastic net tail also includes: a second shielding portion extending along the radial direction of the connecting cable; wherein the clamping portion is located between the first shielding portion and the second shielding portion; when the clamping portion is clamped in the clamping slot, the second shielding portion abuts against the inner wall of the first shell and is accommodated inside the shell component.

[0014] In some embodiments, the connecting cable includes: an input cable and an output cable; the shell component is provided with a first bayonet and a second bayonet; wherein the input cable passes through the first bayonet and is electrically connected to the circuit component; the output cable passes through the second bayonet and is electrically connected to the circuit component; the first bayonet and the second bayonet are located at two ends of the shell component that are opposite to each other.

[0015] In some embodiments, the circuit component includes: a PCB board; the PCB board is arranged inside the shell component; the PCB board has a first end and a second end that are opposite to each other; wherein the input cable is electrically connected to the first end of the PCB board, and an elastic net tail for protecting the cable is formed at a connection close to the first end; wherein the output cable is electrically connected to the second end of the PCB board, and an elastic net tail for protecting the cable is formed at a connection close to the second end.

[0016] In some embodiments, the gap between the retaining bone and the retaining groove is filled and bonded by molten thermoplastic material to form a sealed connection between the first shell and the second shell.

[0017] At least one advantageous aspect of the power adapter provided by the embodiment of the utility model is that the tail of the net can achieve a good waterproof effect without using a silicone ring by means of interference fit between the tail of the net and the bayonet opening of the shell component, thereby simplifying the assembly process and reducing costs. The additional extrusion portion can further improve the sealing between the tail of the net and the shell component, thereby improving the waterproof performance of the power adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent the same elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0019] Figure 1 A three-dimensional exploded view of a power adapter provided in an embodiment of the utility model;

[0020] Figure 2 A three-dimensional exploded view of a housing component provided in an embodiment of the utility model;

[0021] Figure 3 A front cross-sectional view of the power adapter provided by an embodiment of the utility model, related to the input mesh tail;

[0022] Figure 4 The embodiment of the utility model provides Figure 3 A local enlarged view at point A;

[0023] Figure 5 The embodiment of the utility model provides Figure 3 A local enlarged view at point B;

[0024] Figure 6 A front cross-sectional view of the power adapter provided by an embodiment of the utility model and related to the output cable;

[0025] Figure 7 The embodiment of the utility model provides Figure 6 A partial enlargement of point C.

[0026] Description of the drawings: 100, power adapter; 1, shell component; 11, first shell; 12, second shell; 101, bayonet; 102, extrusion part / pressing bone; 1011, first bayonet; 1012, second bayonet; 1101, first slot; 1102, second slot; 1201, first notch; 1202, second notch; 1203, first pressing bone; 1204, second pressing bone; 2, circuit component; 21, PCB board ; 3. Connecting cable; 30. Net tail; 31. Input cable; 32. Output cable; 301. Clamping part; 302. First shielding part; 303. Second shielding part; 304. Third shielding part; 305. Fourth shielding part; 306. Input net tail; 307. Output net tail; 3011. First clamping part; 3012. Second clamping part; 4. Shell sealing component; 41. Stop groove; 42. Stop bone; 421. Ultrasonic welding line. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with specific embodiments. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0028] It should be noted that, unless otherwise clearly specified and limited, the terms "external", "internal", "extended", "close to", "protruding from", etc. used in this specification to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. The terms such as "installation", "fitting", "connection" and "fixation" should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; "fixation" can be bolted, snap-fitted or glued; the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of such features; in addition, "and / or" includes any and all combinations of one or more related listed items; for those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In order to make the purpose, technical solutions and advantages of the utility model clearer, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In this embodiment, the specific shape, structure, size, etc. of the "power adapter" are not limited, and those skilled in the art may selectively use any appropriate implementation method according to actual needs.

[0031] Figure 1 A three-dimensional exploded view of a power adapter provided in an embodiment of the utility model. Figure 2 This is a three-dimensional exploded view of the shell component provided in an embodiment of the utility model.

[0032] See also Figure 1 and Figure 2 The power adapter 100 includes: a shell component 1, a circuit component 2, a connecting cable 3 and a shell sealing component 4.

[0033] The housing component 1 is provided with a plurality of bayonet holes 101 for connecting the inner space of the housing component with the outer space. The bayonet holes 101 are provided with an extrusion portion 102 extending toward the inside of the bayonet holes.

[0034] The circuit component 2 is accommodated in the housing component 1. A plurality of connecting cables 3 pass through the housing component 1 through corresponding bayonet holes 101 to establish electrical connection with the circuit component 2.

[0035] Each cable 3 is provided with a tail 30 at the connection with the circuit component 2. The tail 30 refers to a protruding and enlarged connection portion located at the periphery of the connecting cable, which can provide sufficient mechanical strength to connect and fix the cable.

[0036] The mesh tail is an elastic component. In the assembled power adapter, the mesh tail 30 and the bayonet are interference fit, and the elasticity of the mesh tail is used to minimize the gap between the mesh tail and the edge of the bayonet, thereby providing good waterproof sealing. Correspondingly, the squeezing portion 102 will also squeeze the mesh tail in the bayonet 101, thereby further improving the waterproof sealing.

[0037] Specifically, the housing component 1 may be composed of a sealed first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are tightly connected via a housing sealing component to provide sufficient waterproof performance.

[0038] Correspondingly, the above-mentioned bayonet can be formed by a bayonet groove provided in the first shell 11 and a notch provided in the second shell.

[0039] In some embodiments, the net tail 30 may include: a clamping portion 301. The clamping portion 301 has a shape that matches the bayonet 101. Thus, the clamping portion 301 can cooperate with the bayonet 101 to fix the net tail 30 on the housing component 1.

[0040] Specifically, under the extrusion of the shell component 1 , the surfaces of the extrusion portion 102 and the clamping portion 301 are pressed against each other, and the side wall surface of the bayonet 101 abuts against the clamping portion 301 , filling the gap between the clamping portion 301 and the bayonet 101 .

[0041] Figure 3 A front cross-sectional view of the power adapter provided in an embodiment of the utility model and related to the input mesh tail. Figure 4 The embodiment of the utility model provides Figure 3 A partial enlarged view at point A. Figure 5 The embodiment of the utility model provides Figure 3 A partial enlarged view at point B.

[0042] Combination Figure 1 to Figure 5 It can be seen that the housing sealing component 4 includes a locking groove 41 and a locking bone 42 .

[0043] In addition, the retaining groove 41 and the retaining bone 42 are both arranged on the housing part 1; the retaining bone 42 is provided with an ultrasonic welding line 421. The "ultrasonic welding line" is a linear structure formed by a thermoplastic material. It has the characteristics of melting under heat and then rapidly cooling and solidifying.

[0044] Therefore, after the locking bone 42 and the locking groove 41 are engaged with each other, the ultrasonic welding line 421 can be melted by the energy transmitted by the ultrasonic vibration, thereby filling the gap between the locking bone 42 and the locking groove 41 and bonding the two.

[0045] It can be understood that an interference fit is adopted between the clamping portion 301 of the net tail 30 and the bayonet 101 of the shell component 1, and the cross-sectional size of the clamping portion 301 is larger than the cross-sectional size of the bayonet 101, and the clamping portion 301 is elastic. Therefore, the net tail 30 can be better assembled to the shell component 1 through the mutual extrusion and fit of the clamping portion 301 and the bayonet 101, and can also effectively prevent external moisture from penetrating into the interior of the shell component 1.

[0046] Specifically, a circle of locking bones 42 is provided on the second shell 12, and a circle of continuous ultrasonic welding lines 421 is provided on the locking bones 42; the second shell 12 is provided with a locking groove 41 adapted to the locking bones 42; wherein, the continuous ultrasonic welding line 421 is inserted into the locking groove 41, and ultrasonic welding is performed so that the ultrasonic welding line 421 is melted, thereby filling the locking groove 41, so that the shell component 1 has better sealing at the joint, thereby being able to more effectively prevent external moisture from penetrating from the joint of the shell component 1 into the interior of the shell component 1.

[0047] In some embodiments, Figure 1 to Figure 5 As shown, the cable 3 includes: an input cable 31 and an output cable 32 .

[0048] For ease of description, the tail disposed on the input cable 31 is referred to as the input tail 306, and the tail disposed on the output cable 32 is referred to as the output tail 307. Correspondingly, the clamping parts 301 are respectively referred to as: a first clamping part 3011 disposed on the input tail 306 and a second clamping part 3012 disposed on the output tail 307.

[0049] Matching the above-mentioned input cable and output cable, the bayonet 101 provided on the housing component may include: a first bayonet 1011 and a second bayonet 1012 .

[0050] The input net tail 306 passes through the first bayonet 1011 so that the first bayonet 1011 and the first clamping portion 3011 are mutually clamped; the output net tail 307 passes through the second bayonet 1012 so that the second bayonet 1012 and the second clamping portion 3012 are mutually clamped.

[0051] In some embodiments, see Figure 1 to Figure 5 The first housing 11 is provided with a first slot 1101 and a second slot 1102 at two ends away from each other. The second housing 12 is provided with a first notch 1201 and a second notch 1202 at two ends away from each other. A first compression bone 1203 is provided in the first notch 1201, and a second compression bone 1204 is provided in the second notch 1202.

[0052] Therefore, when the first housing 11 and the second housing 12 are engaged with each other, the first slot 1101 and the first notch 1201 together form a first slot 1011 , and the second slot 1102 and the second notch 1202 together form a second slot 1012 .

[0053] Specifically, the cross-sectional shape of the first clamping portion 3011 and the second clamping portion 3012 may be a trapezoid. The shape of the first clamping slot 1101 and the second clamping slot 1102 is also set to be a trapezoid, with two mutually inclined sidewalls (ie, the two sides of the trapezoid).

[0054] In some embodiments, in combination Figure 1 to Figure 5 It can be seen that the cross-sectional shape of the first pressing bone 1203 is a triangle; the first clamping portion 3011 is elastic. Therefore, when the first clamping portion 3011 and the first bayonet 1011 are engaged with each other, the first pressing bone 1203 can press out a first sealing groove that matches the first pressing bone 1203 on the surface of the first clamping portion 3011; the first pressing bone 1203 and the first sealing groove are pressed and abutted, so that a sealed engagement is formed between the first clamping portion 3011 and the first bayonet 1011, which can effectively prevent external moisture from penetrating into the interior of the housing component 1.

[0055] In some embodiments, according to Figure 1 to Figure 5It can be seen that the cross-sectional shape of the second pressing bone 1204 is a triangle; the second clamping portion 3012 is elastic. Therefore, when the second clamping portion 3012 and the second bayonet 1012 are engaged with each other, the second pressing bone 1204 can press out a second sealing groove that matches the second pressing bone 1204 on the surface of the second clamping portion 3012; the second pressing bone 1204 and the second sealing groove are pressed and abutted, so that a sealed engagement is formed between the second clamping portion 3012 and the second bayonet 1012, which can effectively prevent external moisture from penetrating into the interior of the housing component 1.

[0056] Figure 6 A front cross-sectional view of a power adapter provided in an embodiment of the utility model and associated with an output cable. Figure 7 The embodiment of the utility model provides Figure 6 A partial enlarged view of point C

[0057] See also Figure 1 to Figure 6 The circuit component 2 includes: a PCB board 21. The PCB board 21 is arranged inside the housing component 1; the PCB board 21 has a first end and a second end which are away from each other.

[0058] One end of the input cable 31 passes through the first bayonet 1011 and is connected to the first end of the PCB board 21 ; the other end of the input cable 31 passes through the first bayonet 1011 and extends to the outside of the housing component 1 .

[0059] In addition, one end of the output cable 32 passes through the second bayonet 1012 and is connected to the second end of the PCB board 21 ; the other end of the output cable 32 passes through the second bayonet 1012 and extends to the outside of the housing component 1 .

[0060] In some embodiments, see Figure 1 to Figure 7 The input mesh tail 306 has a first shielding portion 302 and a second shielding portion 303 which are separated from each other; the first clamping portion 3011 is located between the first shielding portion 302 and the second shielding portion 303 .

[0061] It can be understood that when the first clamping portion 3011 and the first bayonet 1011 are engaged with each other, the surface of the first shielding portion 302 abuts against the outer surface of the shell component 1, and the surface of the second shielding portion 303 abuts against the inner surface of the shell component 1, so that the first bayonet 1011 is blocked.

[0062] In some embodiments, please refer to Figure 1 to Figure 7 The output net tail 307 has a third shielding portion 304 and a fourth shielding portion 305 which are separated from each other; the second clamping portion 3012 is located between the third shielding portion 304 and the fourth shielding portion 305 .

[0063] It should be noted that when the second clamping portion 3012 and the second bayonet 1012 are engaged with each other, the surface of the third shielding portion 304 abuts against the outer surface of the shell component 1, and the surface of the fourth shielding portion 305 abuts against the inner surface of the shell component 1, so that the second bayonet 1012 is blocked.

[0064] In some embodiments, Figure 1 to Figure 6 As shown, the first shielding portion 302 and the third shielding portion 304 both extend to the outside of the shell component 1 , and the second shielding portion 303 and the fourth shielding portion 305 are both accommodated inside the shell component 1 .

[0065] In the embodiment of the present application, the power adapter 100 can achieve IP44 waterproof performance.

[0066] Combination Figure 1 to Figure 7 , the assembly method of the power adapter 100 is described in detail:

[0067] First, the circuit component 2 with the cable 3 is installed on the first housing 11 ; during installation, the first clamping portion 3011 is first clamped into the first clamping slot 1101 with a certain pressure, and the second clamping portion 3012 is clamped into the second clamping slot 1102 at the same time.

[0068] Then, align and install the second shell 12 with the locking bone 42 and the first shell 11 with the locking groove 41 so that the locking bone 42 can be inserted into the locking groove 41; at the same time, align and install the first notch 1201 of the second bottom shell and the first groove 1101 of the first shell 11, and align and install the second notch 1202 of the second bottom shell and the second groove 1102 of the first shell 11.

[0069] Finally, the first shell 11 and the second shell 12 are fixed by ultrasonic welding. Under the action of the ultrasonic equipment, the ultrasonic weld line 421 will be melted to fill the gap between the retaining groove 41 and the retaining bone 42, so that the first shell 11 and the second shell 12 have better sealing at the joint. At the same time, when the first shell 11 and the second shell 12 are joined to each other, a certain pressure will be generated to press the clamping part 301 of the net tail 30, so that the net tail 30 can be further fixed on the shell component 1.

[0070] In summary, in the power adapter provided by the embodiment of the utility model, the mesh tail generates an interference fit between the snap-fit ​​portion and the snap-fit ​​of the shell component, so that the mesh tail and the shell component can achieve a better waterproof effect at the connection, and can also reduce the use of silicone rings, thereby reducing costs; by adding an ultrasonic welding line design, the first shell and the second shell can achieve a better waterproof effect at the joint; by adding a compression bone as an extrusion portion, the sealing between the mesh tail and the shell component can be made better, thereby improving the waterproof performance of the power adapter and reducing or avoiding negative effects on circuit components housed in the shell component.

[0071] The above contents are further detailed descriptions of the present invention in combination with specific / preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A power adapter, characterized in that: include: A shell component with a plurality of bayonet holes; a circuit component housed inside the housing component; Several connecting cables; One of the connecting cables passes through one of the bayonet holes and is electrically connected to the circuit component; Wherein, an elastic net tail is provided at the connection between the connecting cable and the circuit component; the elastic net tail is interference fit with the bayonet; and at least a part of the edge of the bayonet is also provided with an extrusion portion extending toward the direction approaching the elastic net tail.

2. The power adapter according to claim 1, characterized in that: The housing component comprises: a first housing and a second housing that are sealed and connected; Wherein, on the contact surface between the first shell and the second shell, the first shell is provided with a retaining groove; the second shell is provided with a retaining bone matched with the retaining groove; the retaining bone is confined in the retaining groove.

3. The power adapter according to claim 2, characterized in that: The net tail comprises: a clamping portion; a clamping slot adapted to the clamping portion is provided on the first shell; Wherein, the clamping portion is clamped in the clamping slot.

4. The power adapter according to claim 3, characterized in that: The second shell is provided with a notch; the notch and the card slot are combined to form the card slot; Wherein, a protruding compression bone is arranged in the notch to form the extrusion portion.

5. The power adapter according to claim 4, characterized in that: The cross-sectional shape of the compression bone is a triangle; Wherein, the clamping portion is elastic and forms a sealing groove which is sealingly engaged with the compression bone under the compression of the compression bone.

6. The power adapter according to claim 3, characterized in that: The elastic net tail further comprises: a first shielding portion extending along the radial direction of the connecting cable; When the engaging portion is locked in the engaging slot, the first shielding portion abuts against the outer surface of the first shell, so that at least a portion of the engaging opening is shielded.

7. The power adapter according to claim 6, characterized in that: The elastic net tail further comprises: a second shielding portion extending along the radial direction of the connecting cable; Wherein, the engaging portion is located between the first shielding portion and the second shielding portion; when the engaging portion is locked in the engaging groove, the second shielding portion abuts against the inner wall of the first shell and is accommodated inside the shell component.

8. The power adapter according to claim 1, characterized in that: The connecting cable comprises: an input cable and an output cable; the housing component is provided with a first bayonet and a second bayonet; The input cable passes through the first bayonet and is electrically connected to the circuit component; the output cable passes through the second bayonet and is electrically connected to the circuit component; The first bayonet and the second bayonet are located at two ends of the housing component that are away from each other.

9. The power adapter according to claim 8, characterized in that: The circuit components include: PCB board; the PCB board is arranged inside the housing component; the PCB board has a first end and a second end which are away from each other; The input cable is electrically connected to the first end of the PCB board, and an input tail for protecting the cable is formed at a connection close to the first end; The output cable is electrically connected to the second end of the PCB board, and an output mesh tail for protecting the cable is formed at a connection close to the second end.

10. The power adapter according to claim 2, characterized in that: The gap between the retaining bone and the retaining groove is filled and bonded by molten thermoplastic material to form a sealed connection between the first shell and the second shell.

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