Circuit board and electronic device

Abstract

The application relates to the technical field of electronic industry, and discloses a circuit board and an electronic device. The circuit board comprises a printed board, a shell and a sealing piece; the printed board is provided with a conductive contact piece, the printed board is used for integrating a chip, and the conductive contact piece is in communication with the chip; the shell is detachably arranged on the printed board, surrounds the printed board to form a containing cavity, and the conductive contact piece is arranged in the containing cavity; the shell is provided with an interface groove, and the containing cavity is communicated with the outside through the interface groove; and the sealing piece is clamped between the shell and the printed board. In the manner, the circuit board can have waterproof performance and realize modularization, the efficiency of assembling the circuit board is improved, and each module can be disassembled for maintenance and repair.

Description

Technical Field

[0001] This invention relates to the field of electronic industry technology, and in particular to a circuit board and an electronic device. Background Technology

[0002] A PCB (Printed Circuit Board) is used in many electronic devices such as electronic watches, calculators, computers, mobile phones, and tablets. It serves as the support structure for electronic components and the carrier for their electrical interconnections. PCBs use printed circuits to replace traditional complex wiring, simplifying the assembly and soldering of electronic devices and reducing the amount of wiring work required by traditional methods.

[0003] The lack of waterproofing between PCBs and electronic components poses a risk to their use. For example, when connecting PCBs to connectors for electronic components, the PCB end interface directly contacts the connector terminals. This can easily lead to a short circuit at the contact point between the PCB end interface and the connector terminals when moisture enters the assembled device after assembly, affecting the overall circuitry.

[0004] To address the lack of waterproofing between PCBs and electronic components, existing technologies typically involve sealing the entire assembly of the PCB and electronic components to form a gas-sealed enclosure, reducing the risk of moisture entering the assembled device. However, if the PCB or electronic components are damaged, the sealed enclosure may be unrepairable, requiring replacement. Furthermore, this sealing method is suitable for small PCBs; it presents manufacturing difficulties for larger PCBs, resulting in limited applicability. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a circuit board and an electronic device that are waterproof and modular, which is beneficial to improving the efficiency of assembling the circuit board and also facilitates the disassembly of each module for maintenance / repair.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A circuit board is provided. The circuit board includes a printed circuit board, a housing, and a sealing element; the printed circuit board has conductive contacts, and the printed circuit board is used to integrate chips, with the conductive contacts communicating with the chips; the housing is detachably disposed on the printed circuit board, forming an accommodating cavity with the printed circuit board, and the conductive contacts are disposed in the accommodating cavity; the housing has an interface groove, and the accommodating cavity communicates with the outside through the interface groove; the sealing element is clamped between the housing and the printed circuit board.

[0007] In one embodiment of the invention, the housing has an opening on the side facing the printed circuit board, and a seal is fitted onto the edge of the opening.

[0008] In one embodiment of the present invention, the seal has a clamping portion and a stepped portion; the stepped portion protrudes from the side of the clamping portion away from the printed circuit board; the clamping portion clamps between the housing and the printed circuit board, and the stepped portion covers the housing around the opening; when the seal is not clamped, the height of the clamping portion in a first direction is greater than the height of the gap between the housing and the printed circuit board in a second direction when the housing is placed on the printed circuit board; wherein, the first direction is parallel to the relative direction between the clamping portion and the stepped portion, and the second direction is parallel to the relative direction between the housing and the printed circuit board.

[0009] In one embodiment of the present invention, the circuit board further includes a limiting member disposed on the side of the printed circuit board facing the housing; the limiting member surrounds and forms a limiting groove, and the housing is embedded in the limiting groove.

[0010] In one embodiment of the present invention, one of the limiting member and the housing is provided with a connecting groove, and the other is provided with an elastic connecting part; the elastic restoring force of the elastic connecting part is used to drive the elastic connecting part into the connecting groove during the process of the housing being embedded in the limiting groove, and to allow the elastic connecting part to disengage from the connecting groove when the housing leaves the limiting groove.

[0011] In one embodiment of the present invention, the limiting member includes at least two groove walls, which are not on the same plane and are connected in sequence to form a limiting groove; the housing has a first side wall, a second side wall, a third side wall, a fourth side wall and a fifth side wall, the first side wall and the third side wall are opposite to each other and spaced apart, the second side wall and the fourth side wall are opposite to each other and spaced apart, and the two sides of the first side wall are respectively connected to the two sides of the third side wall through the second side wall and the fourth side wall; the fifth side wall is connected to the side of the first side wall, the second side wall, the third side wall and the fourth side wall away from the printed circuit board; the interface groove is provided on the first side wall; the groove wall of the limiting groove covers at least two of the first side wall, the second side wall, the third side wall, the fourth side wall and the fifth side wall.

[0012] In one embodiment of the present invention, the limiting member includes a first groove wall, a second groove wall and a third groove wall, the first groove wall and the third groove wall are opposite to each other and spaced apart, and the two are connected by the second groove wall; both the first groove wall and the third groove wall are provided with connecting grooves; both the second side wall and the fourth side wall of the housing are provided with elastic connecting portions.

[0013] In one embodiment of the present invention, one of the limiting member and the printed circuit board is provided with a positioning part, and the other is provided with a positioning hole; the positioning part is embedded in the positioning hole.

[0014] In one embodiment of the present invention, the circuit board further includes a plurality of interface components, which are disposed in interface slots and abut against conductive contacts to connect external devices connected thereto with the conductive contacts.

[0015] To achieve the above objectives, another technical solution adopted by the present invention is to provide an electronic device. The electronic device includes a chip and a circuit board as described in any of the above embodiments, wherein the chip is integrated into the circuit board.

[0016] Compared to existing technologies, the sealing element of this invention is clamped between the housing and the printed circuit board, providing a sealing and waterproof function. Simultaneously, the housing is detachably mounted on the printed circuit board, allowing for separation of the housing from the board for maintenance or circuit board failure. Furthermore, the separability of the housing and the printed circuit board enables modularization of the circuit board and improves assembly efficiency. The encapsulation method of the sealing element, housing, and printed circuit board simplifies the circuit board manufacturing process, reduces size limitations, and thus broadens the applicability of the encapsulation method. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the electronic device of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a circuit board according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of an embodiment of the housing and interface components of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of a printed circuit board and a limiting member according to an embodiment of the present invention;

[0022] Figure 5 yes Figure 2 A schematic diagram of the cross-sectional structure of the circuit board along the AA direction.

[0023] Figure 6 This is a schematic diagram of the structure of a printed circuit board according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of an embodiment of the limiting member of the present invention;

[0025] Figure 8 This is a schematic diagram of another embodiment of the printed circuit board of the present invention;

[0026] Figure 9 This is a schematic diagram of another embodiment of the limiting member of the present invention. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described through specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] To address the technical problem of unmaintainable circuit boards after waterproof sealing in existing technologies, this invention discloses a circuit board and an electronic device. The circuit board includes a printed circuit board, a housing, and a seal. The printed circuit board has conductive contacts, and the printed circuit board is used to integrate chips; the conductive contacts are connected to the chips. The housing is detachably disposed on the printed circuit board, forming a receiving cavity with the printed circuit board; the conductive contacts are disposed in the receiving cavity; the housing has an interface groove, through which the receiving cavity communicates with the outside; the seal is clamped between the housing and the printed circuit board. The invention is described in detail below.

[0029] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the electronic device of the present invention.

[0030] In one embodiment, the electronic device includes a chip 10 and a circuit board 20. The chip 10 is integrated into the circuit board 20, and the chip 10 can control and coordinate with other components of the electronic device. The chip 10 integrated into the circuit board 20 can be considered equivalent to the motherboard of the electronic device.

[0031] For example, electronic devices can be electronic watches, calculators, computers, communication devices, smart scales, etc., without limitation. Chips can be MCUs (Microcontroller Units), constant current chips, etc., without limitation.

[0032] The specific structure of the circuit board is described in detail below.

[0033] Please see Figures 2 to 5 , Figure 2 This is a schematic diagram of the structure of a circuit board according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of an embodiment of the housing and interface components of the present invention. Figure 3 This is a schematic diagram of the structure of a printed circuit board and a limiting member according to an embodiment of the present invention. Figure 5 yes Figure 2 The diagram shows a cross-sectional view of the circuit board along the AA direction.

[0034] In one embodiment, the circuit board includes a printed circuit board 21, a housing 22, and a seal 23.

[0035] Taking a PCB as an example, the printed circuit board 21 is equivalent to the insulating base of the PCB. It can be printed with circuit lines and also serves to support other components on the circuit board. The printed circuit board 21 has conductive contacts 211 integrated into the chip 10 (e.g., ...). Figure 1 As shown, the conductive contact 211 can be connected via printed circuits / physical conductive parts, and the conductive contact 211 can also be connected to electronic components to realize the connection between the chip 10 and electronic components.

[0036] The housing 22 is detachably mounted on the printed circuit board 21. When the housing 22 is mounted on the printed circuit board 21, the housing 22 and the printed circuit board 21 form a receiving cavity 221, and the conductive contact 211 is located in the receiving cavity 221. The housing 22 is provided with an interface groove 222, and the receiving cavity 221 is connected to the outside through the interface groove 222. That is, electronic components, etc., can extend into the receiving cavity 221 through the interface groove 222 and be electrically connected to the conductive contact 211.

[0037] The seal 23 is clamped between the housing 22 and the printed circuit board 21, which serves to seal and waterproof, reducing the risk of moisture entering the accommodating cavity 221 and affecting the electrical connection between the conductive contact 211 and electronic components.

[0038] Therefore, in this embodiment, the seal 23 is clamped between the housing 22 and the printed circuit board 21, serving to seal and waterproof. Simultaneously, the housing 22 is detachably mounted on the printed circuit board 21, achieving modularity of the circuit board. This allows the housing 22 to be separated from the printed circuit board 21 for maintenance / repair in case of maintenance or circuit board failure, and also improves the efficiency of circuit board assembly. The encapsulation method of the seal 23, housing 22, and printed circuit board 21 simplifies the circuit board manufacturing process, reduces size limitations, and thus broadens the applicability of the encapsulation method.

[0039] Please continue reading. Figures 2 to 5 In one embodiment, the housing 22 has an opening 223 on the side facing the printed circuit board 21, and the sealing member 23 is sleeved on the edge of the opening 223. Therefore, when the housing 22 is disposed on the printed circuit board 21, the sealing member 23 can be clamped between the housing 22 and the printed circuit board 21, and the conductive contact 211 is disposed opposite to the opening 223 so that the conductive contact 211 is located in the receiving cavity 221.

[0040] Furthermore, the seal 23 may have a clamping portion 231 and a stepped portion 232, the stepped portion 232 protruding from the clamping portion 231 on the side opposite to the printed circuit board 21.

[0041] The clamping part 231 is clamped between the housing 22 and the printed circuit board 21, and the stepped part 232 covers the housing 22 around the opening 223 to reduce the risk of the seal 23 detaching from the housing 22 and the printed circuit board 21. This is beneficial for the seal 23 to be clamped between the housing 22 and the seal 23, thereby improving the reliability of the circuit board.

[0042] When the seal 23 is not clamped, the height of the clamping part 231 in the first direction is greater than the height of the gap between the housing 22 and the printed circuit board 21 in the second direction when the housing 22 is provided on the printed circuit board 21. The first direction is parallel to the relative direction between the clamping part 231 and the stepped part 232, and the second direction is parallel to the relative direction between the housing 22 and the printed circuit board 21.

[0043] When the seal 23 is clamped between the housing 22 and the printed circuit board 21, the first direction is parallel to the second direction. This is equivalent to the thickness of the clamping part 231 being greater than the height of the gap between the housing 22 and the printed circuit board 21, thereby achieving an interference fit between the seal 23 and the housing 22 and the printed circuit board 21, and improving the sealing effect of the seal 23.

[0044] Among them, the sealing element 23 can be made of elastic silicone, TPE (Thermoplastic Elastomer), etc., which will not be described in detail here.

[0045] Please continue reading. Figures 2 to 5 In one embodiment, the circuit board further includes a limiting member 212.

[0046] The limiting member 212 is located on the side of the printed circuit board 21 facing the housing 22. As the name suggests, the limiting member 212 can limit the housing 22.

[0047] The limiting member 212 surrounds and forms a limiting groove 2121, and the housing 22 is embedded in the limiting groove 2121 so that the housing 22 is reliably disposed on the printed circuit board 21.

[0048] Optionally, the housing 22 can be detachably disposed on the printed circuit board 21. Specifically, the housing 22 can be detachably disposed on the limiting member 212, which can fix the housing 22 while limiting it.

[0049] Specifically, one of the limiting member 212 and the housing 22 is provided with a connecting groove 2122, and the other is provided with an elastic connecting part 224. That is, the limiting member 212 may be provided with a connecting groove 2122 and the housing 22 may be provided with an elastic connecting part 224; or the limiting member 212 may be provided with an elastic connecting part 224 and the housing 22 may be provided with a connecting groove 2122.

[0050] As its name suggests, the elastic connection 224 should be elastic. The elastic restoring force of the elastic connection 224 is used to drive the elastic connection 224 into the connecting groove 2122 during the process of the housing 22 being inserted into the limiting groove 2121, and to abut against the edge of the connecting groove 2122, thereby achieving a reliable connection between the housing 22 and the limiting member 212; when the housing 22 leaves the limiting groove 2121, the elastic connection 224 is allowed to disengage from the connecting groove 2122, and when the housing 22 is disengaged from the limiting groove 2121, the elastic connection 224 can return to its original position. This improves the assembly efficiency of the circuit board and also helps to improve the efficiency of maintenance / repair.

[0051] like Figure 3 and Figure 4 As illustrated in the example, the housing 22 is provided with an elastic connecting portion 224, and the limiting member 212 is provided with a connecting groove 2122. During the process of the housing 22 being inserted into the limiting groove 2121, the elastic connecting portion 224 contacts the limiting member 212 and moves toward the receiving cavity 221 to avoid the limiting member 212. At this time, the elastic connecting portion 224 is elastically compressed. When the elastic connecting portion 224 is opposite to the connecting groove 2122, the elastic restoring force of the elastic connecting portion 224 drives the elastic connecting portion 224 to be inserted into the connecting groove 2122, thereby realizing the connection between the housing 22 and the limiting member 212.

[0052] Please continue reading. Figures 2 to 5 In one embodiment, the limiting member 212 includes at least two groove walls that are not on the same plane and are connected in sequence to form a limiting groove 2121.

[0053] The housing 22 has a first sidewall C1, a first sidewall C2, a third sidewall C3, a fourth sidewall C4, and a fifth sidewall C5.

[0054] The first sidewall C1 and the third sidewall C3 are opposite to each other and spaced apart, and the first sidewall C2 and the fourth sidewall C4 are opposite to each other and spaced apart. The two sides of the first sidewall C1 are connected to the two sides of the third sidewall C3 via the first sidewall C2 and the fourth sidewall C4, respectively. The fifth sidewall C5 is connected to the side of the first sidewall C1, the first sidewall C2, the third sidewall C3, and the fourth sidewall C4 away from the printed circuit board 21. The interface slot 222 can be provided in the first sidewall C1.

[0055] The groove wall of the limiting groove 2121 covers at least two of the first side wall C1, the first side wall C2, the third side wall C3, the fourth side wall C4, and the fifth side wall C5, thereby improving the reliability of limiting the housing 22. "Covering" means that it is set relative to the side wall of the housing 22. The groove wall of the limiting member 212 can abut against the side wall of the housing 22, or there can be a gap between the two.

[0056] like Figure 3As illustrated in the example, the limiting member 212 includes a first groove wall D1, a second groove wall D2, and a third groove wall D3. The first groove wall D1 and the third groove wall D3 are opposite to each other and spaced apart, and are connected by the second groove wall D2.

[0057] The first groove wall D1, the second groove wall D2, and the third groove wall D3 of the limiting groove 2121 can respectively cover the first side wall C2, the third side wall C3, and the fourth side wall C4 of the housing 22.

[0058] Furthermore, both the first groove wall D1 and the third groove wall D3 of the limiting groove 2121 are provided with connecting grooves 2122. Both the first side wall C2 and the fourth side wall C4 of the housing 22 are provided with elastic connecting portions 224. This is equivalent to the limiting member 212 having two connecting grooves 2122 and the housing 22 being provided with two elastic connecting portions 224, which facilitates the reliable assembly of the housing 22 into the limiting groove 2121.

[0059] In an alternative embodiment, the number of connecting grooves 2122 and elastic connecting portions 224 may be three, four, five, etc., and is not limited here.

[0060] Please see Figure 3 as well as Figures 6 to 9 , Figure 6 This is a schematic diagram of the structure of a printed circuit board according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of an embodiment of the limiting member of the present invention. Figure 8 This is a schematic diagram of another embodiment of the printed circuit board of the present invention. Figure 9 This is a schematic diagram of another embodiment of the limiting member of the present invention.

[0061] In one embodiment, one of the limiting member 212 and the printed circuit board 21 is provided with a positioning part 2123, and the other is provided with a positioning hole 213. The positioning part 2123 is inserted into the positioning hole 213 to achieve a reliable connection between the limiting member 212 and the printed circuit board 21. In other words, the limiting member 212 may be provided with a positioning hole 213, and the printed circuit board 21 may be provided with a positioning part 2123; or, it may be as follows: Figure 6 and Figure 7 As illustrated in the example, the limiting member 212 is provided with a positioning part 2123, and the printed circuit board 21 is provided with a positioning hole 213.

[0062] Optionally, the limiting member 212 can be made of a hard material such as metal or hard plastic to reliably limit the housing 22 and reduce the risk of damage.

[0063] Among them, such as Figure 6 and Figure 7As illustrated in the example, the limiting member 212 is made of metal. After the positioning part 2123 is inserted into the positioning hole 213, the two can be fixed by welding, pressing, or other methods to achieve a fixed connection between the limiting member 212 and the printed circuit board 21. Alternatively, as... Figure 8 and Figure 9 As illustrated in the example, the limiting member 212 and the printed circuit board 21 can be riveted together via the positioning part 2123 and the positioning hole 213. The limiting member 212 and the printed circuit board 21 can also be connected by other methods, which will not be described in detail here.

[0064] Please continue reading. Figures 2 to 5 In one embodiment, the circuit board further includes several interface components 24 that can be electrically connected to other components (external devices).

[0065] Interface component 24 passes through interface slot 222 and abuts against conductive contact 211. External devices communicate with interface component 24 to communicate with chip 10 through conductive contact 211, printed circuit of printed circuit board 21, etc., so that chip 10 can control external devices.

[0066] Specifically, the interface component 24 may include multiple interface components 241.

[0067] Interface component 241 includes a conductive portion 2411 and an interface portion 2412. The conductive portion 2411 abuts against the conductive contact 211, and the interface portion 2412 is disposed on the side of the conductive portion 2411 away from the conductive contact 211. The conductive portion 2411 and the interface portion 2412 are connected. The interface portion 2412 is exposed outside the accommodating cavity 221 to be electrically connected to an external device, thereby connecting the external device to the chip 10.

[0068] Optionally, the connection between the conductive part 2411 and the interface part 2412 can be bent and extended toward the printed circuit board 21, and the end of the conductive part 2411 that abuts against the conductive contact 211 can be spoon-shaped to facilitate the electrical connection between the conductive part 2411 and the conductive contact 211.

[0069] The number of interface components 24 can be several groups, including one, two, three, four or even more, without any limitation. Figure 3 The example illustrates a scenario where two sets of interface components 24 extend into the receiving cavity 221 via the interface slot 222. When there are multiple sets of interface components, the arrangement direction of the multiple sets of interface components is perpendicular to the arrangement direction of the interface parts of one set of interface components.

[0070] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circuit board, characterized in that, include: A printed circuit board having conductive contacts, the printed circuit board being used to integrate a chip, the conductive contacts being connected to the chip; The housing is detachably disposed on the printed circuit board and surrounds the printed circuit board to form a receiving cavity, and the conductive contact is disposed in the receiving cavity; the housing is provided with an interface groove, and the receiving cavity communicates with the outside through the interface groove; A sealing element, the sealing element being clamped between the housing and the printed circuit board; A limiting member is provided on the side of the printed circuit board facing the housing; the limiting member surrounds and forms a limiting groove, and the housing is embedded in the limiting groove; one of the limiting member and the housing is provided with a connecting groove, and the other is provided with an elastic connecting part; the elastic restoring force of the elastic connecting part is used to drive the elastic connecting part into the connecting groove during the process of the housing being embedded into the limiting groove, and to allow the elastic connecting part to disengage from the connecting groove when the housing is removed from the limiting groove.

2. The circuit board according to claim 1, characterized in that, The housing has an opening on the side facing the printed circuit board, and the seal is fitted onto the edge of the opening.

3. The circuit board according to claim 2, characterized in that, The sealing element has a clamping portion and a stepped portion; the stepped portion protrudes from the clamping portion on the side opposite to the printed circuit board; the clamping portion clamps between the housing and the printed circuit board, and the stepped portion covers the housing around the opening; When the seal is not clamped, the height of the clamping part in the first direction is greater than the height of the gap between the housing and the printed circuit board in the second direction when the housing is disposed on the printed circuit board; wherein, the first direction is parallel to the relative direction between the clamping part and the stepped part, and the second direction is parallel to the relative direction between the housing and the printed circuit board.

4. The circuit board according to claim 1, characterized in that, The limiting member includes at least two groove walls, which are not on the same plane and are connected in sequence to form a limiting groove; The housing has a first sidewall, a second sidewall, a third sidewall, a fourth sidewall, and a fifth sidewall. The first sidewall is opposite to and spaced apart from the third sidewall, and the second sidewall is opposite to and spaced apart from the fourth sidewall. The two sides of the first sidewall are respectively connected to the two sides of the third sidewall through the second sidewall and the fourth sidewall. The fifth sidewall is connected to the side of the first sidewall, the second sidewall, the third sidewall, and the fourth sidewall away from the printed circuit board. The interface groove is provided on the first sidewall. The groove wall of the limiting member covers at least two of the first sidewall, the second sidewall, the third sidewall, the fourth sidewall, and the fifth sidewall.

5. The circuit board according to claim 4, characterized in that, The limiting member includes a first groove wall, a second groove wall, and a third groove wall. The first groove wall and the third groove wall are opposite to each other and spaced apart, and are connected by the second groove wall. Both the first groove wall and the third groove wall are provided with the connecting groove. Both the second sidewall and the fourth sidewall are provided with the elastic connecting portion.

6. The circuit board according to claim 1, characterized in that, One of the limiting member and the printed circuit board is provided with a positioning part, and the other is provided with a positioning hole; the positioning part is embedded in the positioning hole.

7. The circuit board according to claim 1, characterized in that, The circuit board also includes several interface components, which pass through the interface slot and abut against the conductive contact to connect external devices connected to it to the conductive contact.

8. An electronic device, characterized in that, The electronic device includes a chip and a circuit board as described in any one of claims 1-7, wherein the chip is integrated into the circuit board.

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