CN210137204U - Wireless charger - Google Patents

Abstract

The utility model discloses a wireless charger, including casing, circuit board, coil module and radiating part, the casing is equipped with accommodation space, the circuit board the coil module with the radiating part all set up in the accommodation space, the circuit board is equipped with dodges the portion, the coil module with the circuit board electricity is connected, just at least some of coil module is located dodge in the portion, the radiating part with the coil module supports and leans on. The utility model discloses an among the wireless charger, the circuit board is equipped with dodges the portion, and at least some of coil module is located this dodges the portion, though need set up the heat dissipation part in this wireless charger in order to realize the heat dissipation, but the coil module can set up with the space that the circuit board occupy, and consequently the space that coil module and circuit board occupy jointly is littleer for the thickness of whole wireless charger reduces.

Description

Wireless charger

technical field

The utility model relates to the technical field of charging, in particular to a wireless charger.

Background technique

With the continuous development of mobile terminals in the direction of non-porous, wireless charging technology has received more and more attention. After the wireless charging technology is adopted, there is no need to set a charging port on the shell of the mobile terminal, which makes the appearance texture and waterproofness of the mobile terminal. Better wait.

At present, the relatively mature wireless charging solution is realized by the principle of electromagnetic induction, and the corresponding wireless charger mainly includes coils. When the wireless charger is working, the coil will generate more heat when it is energized, and this heat will have an adverse effect on the reliability of the coil itself and other components of the wireless charger.

In order to solve the above problems caused by the heating of the coil, a heat sink or fan can be designed in the wireless charger to dissipate the heat generated by the coil, so that the temperature of the coil can be kept in a lower range, thereby preventing the coil from overheating. adversely affect itself and other components of the wireless charger. However, after adding heat sinks or fans, the thickness of the entire wireless charger increases.

Utility model content

The utility model discloses a wireless charger, which solves the problem that the thickness of the wireless charger is relatively large.

In order to solve the above-mentioned problems, the utility model adopts the following technical solutions:

A wireless charger includes a casing, a circuit board, a coil module and a heat dissipation part, the casing is provided with an accommodation space, and the circuit board, the coil module and the heat dissipation part are all arranged in the accommodation In the space, the circuit board is provided with an escape portion, the coil module is electrically connected to the circuit board, and at least a part of the coil module is located in the escape portion, and the heat dissipation portion is connected to the coil module. against.

Preferably, in a direction perpendicular to the circuit board, the projection of the coil module and the projection of the circuit board do not overlap each other.

Preferably, the escape portion extends from the side of the circuit board facing away from the heat dissipation portion to the side of the circuit board facing the heat dissipation portion.

Preferably, the escape portion has an arc-shaped inner surface, and the arc-shaped inner surface faces the coil module.

Preferably, the side of the circuit board facing away from the coil module is an arc-shaped side, and the axis of the cylindrical surface where the arc-shaped side surface is located and the axis of the cylindrical surface where the arc-shaped inner surface is located coincide with each other.

Preferably, the circuit board is a ring circuit board, or the circuit board is a partial ring circuit board.

Preferably, the housing includes a base and a cover plate connected to the base, the base and the cover plate together form the accommodation space, and the heat dissipation part abuts against the base.

Preferably, the heat dissipation part is a metal part, the base is a plastic part, and the heat dissipation part and the base are integrally formed.

Preferably, at least one component is provided on a side surface of the circuit board away from the cover plate, and the wireless charger further includes a heat-conducting portion, one side surface of the heat-conducting portion abuts against the component, and the other A surface of one side abuts against the heat dissipation part.

Preferably, the heat dissipation part abuts against at least a part of the circuit board.

The technical scheme adopted by the utility model can achieve the following beneficial effects:

In the wireless charger disclosed in the present invention, the circuit board is provided with an escape portion, and at least a part of the coil module is located in the escape portion. Although the wireless charger needs to be provided with a heat dissipation portion to achieve heat dissipation, the coil module can utilize the circuit board. Therefore, the space occupied by the coil module and the circuit board is smaller, so that the thickness of the entire wireless charger is reduced.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. . In the attached image:

1 is a cross-sectional view of a wireless charger disclosed in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a circuit board in a wireless charger disclosed in an embodiment of the present invention.

Description of reference numbers:

100-shell, 110-accommodating space, 120-base, 130-cover, 200-circuit board, 210-avoidance, 211-arc inner surface, 220-arc side, 300-coil module, 310- Coil, 320-magnetic sheet, 400-heat dissipation part, 500-component, 600-heat-conducting part.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The technical solutions disclosed by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , an embodiment of the present invention discloses a wireless charger, which can realize the charging operation of the mobile terminal. The mobile terminal can be a smart phone, a tablet computer, an e-book reader or a wearable device. Of course, the mobile terminal may also be other devices, which are not limited in this embodiment of the present invention. Specifically, the wireless charger may specifically include a housing 100 , a circuit board 200 , a coil module 300 and a heat dissipation portion 400 .

The casing 100 is the installation base for the components included in the wireless charger, and at the same time the casing 100 can support the mobile terminal. The casing 100 is provided with a accommodating space 110, and the circuit board 200, the coil module 300 and the heat dissipation part 400 are all provided in the accommodating space 110 . In a specific embodiment, the housing 100 may include a base 120 and a cover 130 connected to the base 120 . The base 120 and the cover 130 together form the aforementioned accommodating space 110 , and the mobile terminal may be supported by the cover 130 . It should be noted that the structural parameters such as the shape and size of the base 120 and the cover plate 130 can be selected according to the actual situation, which is not limited by the present invention. Optionally, the base 120 and the cover plate 130 are detachably connected to facilitate the assembly and maintenance of the wireless charger.

At least one component 500 may be mounted on the circuit board 200 , and these components 500 are all electrically connected to the circuit board 200 to realize the preset function of the wireless charger. The coil module 300 is electrically connected to the circuit board 200 so as to supply current to the coil module 300 and adjust the working state of the coil module 300 . Optionally, the coil module 300 may include a coil 310 and a magnetic sheet 320 , and the coil 310 is disposed on the magnetic sheet 320 . The heat dissipation portion 400 abuts against the coil module 300 (specifically, the magnetic sheet 320). The heat dissipation portion 400 has heat dissipation capability, and the heat generated by the operation of the coil module 300 or other components can be dissipated through the heat dissipation portion 400, thereby making the heat dissipation portion 400 dissipate. The overall temperature of the wireless charger can be kept in a low range. At this time, the mobile terminal is not easily affected by the temperature of the wireless charger, so that the temperature of the mobile terminal can also be kept within a low range.

In the embodiment of the present invention, the circuit board 200 is provided with an escape portion 210 , and at least a part of the coil module 300 is located in the escape portion 210 . Although the heat dissipation part 400 needs to be provided in the wireless charger to realize heat dissipation, the coil module 300 can be set by using the space left after the circuit board 200 occupies, so the space occupied by the coil module 300 and the circuit board 200 is smaller. , which reduces the thickness of the entire wireless charger.

It should be noted that, the above-mentioned escape portion 210 may be a groove structure recessed relative to one side surface of the circuit board 200 . In order to further reduce the space occupied by the coil module 300 , the avoidance portion 210 may extend from the side of the circuit board 200 facing away from the heat dissipation portion 400 to the side of the circuit board 200 facing the heat dissipation portion 400 . Referring to FIG. 1 , after this setting, the thickness of the wireless charger is H=H1+H2+H3+H4, wherein H1 is the thickness of the base 120, and H2 is the side of the coil 310 facing the cover 130 and the cover 130 away from the coil The distance between one side of 310 , H3 is the thickness of the coil module 300 , and H4 is the thickness of the heat dissipation portion 400 . It can be seen that the thickness of the wireless charger is basically independent of the thickness of the circuit board 200 , so compared with the existing wireless charger, the thickness of the wireless charger provided by the embodiment of the present invention is smaller.

In order to further reduce the thickness of the wireless charger, optionally, in the direction perpendicular to the circuit board 200 , the projection of the coil module 300 and the projection of the circuit board 200 do not overlap each other. After this arrangement, the distance between the coil module 300 and the circuit board 200 in the direction perpendicular to the circuit board 200 has no special requirements. Therefore, when designing the installation position of the coil module 300 in the housing 100, the circuit board does not need to be considered. Whether the distance between the 200 and the coil module 300 meets the requirements, the coil module 300 can be made as close to the base 120 as possible, so that the thickness of the entire wireless charger is smaller.

Considering that the coil module 300 is generally a circular structure, the structure of the avoidance portion 210 can be adapted to the structure of the coil module 300, so that the area of the part of the circuit board 200 that can be used for arranging the components 500 is larger to meet the requirements of The arrangement requirements of the components 500 are met, and at the same time, the space waste of the circuit board 200 is not caused. Specifically, as shown in FIG. 2 , the escape portion 210 has an arc-shaped inner surface 211 , and the arc-shaped inner surface 211 faces the coil module 300 . At this time, the arc-shaped inner surface 211 of the avoidance portion 210 can be as close to the coil module 300 as possible, so that the circuit board 200 has a larger size in a limited space, so that the components 500 can be arranged. Therefore, this solution can not only meet the arrangement requirements of the components 500, but also minimize the space occupied by the circuit board 200, so that the overall space occupied by the wireless charger is smaller.

Further, the side of the circuit board 200 facing away from the coil module 300 is an arc-shaped side 220 , and the axis of the cylindrical surface where the arc-shaped side 220 is located coincides with the axis of the cylindrical surface where the arc-shaped inner surface 211 is located. In other words, the arc-shaped side surface 220 can be used as at least a part of one cylindrical surface, and the arc-shaped inner surface 211 can be used as at least a part of another cylindrical surface, and the axes of the two cylindrical surfaces are coincident with each other. When this structure is adopted, the arc-shaped side 220 of the circuit board 200 can be adapted to the shape of the wireless charger, so that the arc-shaped side 220 of the circuit board 200 is as close to the inner surface of the casing 100 as possible, so that the inner surface of the casing 100 can be more fully utilized. space to set the component 500. Of course, according to specific requirements, the side of the circuit board facing away from the coil module 300 may also be a side of other shapes. In this case, it is only necessary to ensure that the arc-shaped inner surface 211 is at least a part of the cylindrical surface.

When the circuit board 200 is provided with the avoidance portion 210 , the circuit board 200 may be a ring-shaped circuit board, and the avoidance portion 210 may be provided in the middle of the circuit board 200 . However, for the wireless charger, there are not many components 500 set on the circuit board 200, so when the circuit board 200 is set as a ring circuit board, most of the structures on the circuit board 200 will be wasted and the circuit board 200 will occupy part of the space will be wasted. To solve this problem, the circuit board 200 may be configured as a partially annular circuit board. Specifically, the circuit board 200 may be a half ring circuit board, a 3/4 ring circuit board, a 4/5 ring circuit board, etc. The extension length of the circuit board 200 can be flexibly adjusted according to actual requirements, which is not limited herein. After this arrangement, one side of the circuit board 200 can free up space, so that more space in the casing 100 can be used to arrange other components, so as to improve the utilization rate of the space in the casing 100 . Optionally, at least a part of the heat dissipation part 400 may extend to one side of the circuit board 200 , so that the size of the heat dissipation part 400 is further increased, and the heat dissipation effect thereof is improved accordingly.

In an optional embodiment, the heat dissipation part 400 can abut against the base 120 , so that the heat absorbed by the heat dissipation part 400 can be directly exported through the base 120 , thereby further optimizing the heat dissipation effect. Further, the heat dissipation part 400 can be a metal part (eg, an aluminum plate), and the base 120 can be a plastic part. Preferably, the heat dissipation part 400 is integrally formed with the base 120 (eg, one-piece injection molding), so that the heat on the heat dissipation part 400 can be transferred to the base 120 more quickly. In addition, when assembling the wireless charger, the heat dissipation part 400 and the base 120 can be assembled with other components as one component, so this structure can simplify the assembling operation of the wireless charger and improve the assembling efficiency of the wireless charger.

As mentioned above, at least one component 500 can be mounted on the circuit board 200. In order to facilitate heat dissipation, at least one component 500 can be arranged on the side surface of the circuit board 200 away from the cover plate 130. At the same time, the wireless charger can also include a thermal conductivity part 600 , one side surface of the heat conduction part 600 abuts against the component 500 , and the other side surface abuts against the heat dissipation part 400 . The heat generated during the operation of the component 500 can be quickly transferred to the heat dissipation part 400 through the heat conduction part 600 , and then dissipated through the heat dissipation part 400 . Optionally, the thermally conductive portion 600 here may be thermally conductive glue. Furthermore, all the components 500 mounted on the circuit board 200 that generate heat can be arranged on the side surface of the circuit board 200 away from the cover plate 130, so that the temperature of the wireless charger can be more reliably maintained at a higher level. low range.

In order to further improve the heat dissipation effect, the heat dissipation part 400 can be abutted against at least a part of the circuit board 200 , so that the heat on the circuit board 200 can be dissipated through the heat dissipation part 400 .

The above embodiments of the present invention mainly describe the differences between the various embodiments. As long as the different optimized features of the various embodiments are not contradictory, they can be combined to form better embodiments. Considering the conciseness of the text, here It will not be repeated.

The above descriptions are merely examples of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a wireless charger, characterized in that, includes casing (100), circuit board (200), coil module (300) and heat dissipation portion (400), casing (100) are equipped with accommodation space (110), circuit board (200) coil module (300) with heat dissipation portion (400) all set up in accommodation space (110), circuit board (200) are equipped with dodges portion (210), coil module (300) with circuit board (200) electricity is connected, just at least some of coil module (300) are located dodge portion (210), heat dissipation portion (400) with coil module (300) support and lean on.

2. The wireless charger according to claim 1, wherein a projection of the coil module (300) and a projection of the circuit board (200) do not overlap each other in a direction perpendicular to the circuit board (200).

3. The wireless charger according to claim 1, wherein the escape portion (210) extends from a surface of the circuit board (200) facing away from the heat sink portion (400) to a surface of the circuit board (200) facing toward the heat sink portion (400).

4. The wireless charger of claim 1, wherein the bypass portion (210) has an arcuate inner surface (211), the arcuate inner surface (211) facing the coil module (300).

5. The wireless charger according to claim 4, wherein the side of the circuit board (200) facing away from the coil module (300) is an arc-shaped side (220), and the axis of the cylindrical surface on which the arc-shaped side (220) is located and the axis of the cylindrical surface on which the arc-shaped inner surface (211) is located coincide with each other.

6. The wireless charger of claim 1, wherein the circuit board (200) is a loop circuit board, or wherein the circuit board (200) is a partial loop circuit board.

7. The wireless charger according to claim 1, wherein the housing (100) comprises a base (120) and a cover plate (130) connected to the base (120), the base (120) and the cover plate (130) together form the receiving space, and the heat dissipation portion (400) abuts against the base (120).

8. The wireless charger of claim 7, wherein the heat sink (400) is a metal piece, the base (120) is a plastic piece, and the heat sink (400) is integrally formed with the base (120).

9. The wireless charger according to claim 7, wherein a side surface of the circuit board (200) facing away from the cover plate (130) is provided with at least one component (500), the wireless charger further comprises a heat conducting portion (600), a side surface of the heat conducting portion (600) abuts against the component (500), and the other side surface abuts against the heat dissipating portion (400).

10. The wireless charger of claim 1, wherein the heat sink (400) abuts at least a portion of the circuit board (200).

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