Electronic device

Abstract

The application discloses an electronic device. The electronic device comprises a shell, a circuit board, a first fastener and a second fastener. The circuit board has opposite upper and lower surfaces and a fixing hole penetrating through the upper and lower surfaces. The fixing hole is provided with a conductive contact electrically connected with the circuit board. The first fastener is fixedly connected with the shell and is a conductive part. The second fastener penetrates through the fixing hole and is fastened with the first fastener to connect the shell and the circuit board. The first fastener is electrically connected with the conductive contact on the circuit board. The electronic device not only improves the space utilization rate in the shell, but also reduces the production cost and the risk of deformation of the circuit board without welding on the circuit board.

Description

Technical Field

[0001] This invention relates to the field of electrical connection technology for electronic devices, and more particularly to an electronic device. Background Technology

[0002] Most existing smart bracelets and watches use magnetic charging (see...) Figure 1 The internal connections of the housing are made by injection molding two metal pillars 100 inside the housing mold, and the pins 200 are soldered to the conductive contacts on the back of the circuit board. Figure 2 (not shown in the image) and press-fitted into contact with the metal pillar 100 (see image). Figure 2 This creates an electrical connection between the three components, and additional plastic pillars are still needed in the surrounding area. Figure 2 (Not shown in the image) and the holes on the circuit board, then use screws 201 through the holes and screw them into the plastic pillars to fix the circuit board. This setup takes up space and increases costs. In addition, after screwing in the screws 201, it increases the risk of the circuit board deforming. Furthermore, the conductive contacts on the back of the circuit board are close to the plastic pillars, making it difficult to pre-solder during soldering. If a problem occurs, it will be inconvenient to repair.

[0003] For example, in the prior art, utility model CN215225187U discloses a high-waterproof sports bracelet, which includes a shell and a cover plate located at the bottom of the shell. Sleeves are welded to the four corners inside the shell, and the tails of fixing bolts located at the four corners of the cover plate are located inside the mounting holes of the sleeves to fix the shell and the cover plate. The sports bracelet in CN215225187U uses a similar structure.

[0004] Therefore, there is an urgent need for an electronic device that can improve the space utilization within the housing, while eliminating the need for soldering on the circuit board, thereby reducing production costs and the risk of circuit board deformation. Summary of the Invention

[0005] The purpose of this invention is to provide an electronic device that not only improves the space utilization within the housing, but also eliminates the need for soldering on the circuit board, thereby reducing production costs and minimizing the risk of circuit board deformation.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] An electronic device comprising:

[0008] case;

[0009] A circuit board having opposing upper and lower surfaces and mounting holes penetrating the upper and lower surfaces, wherein the circuit board is provided with conductive contacts for electrical connection at the mounting holes;

[0010] The first fastener is fixedly connected to the housing and serves as a conductive component;

[0011] A second fastener passes through the fixing hole and is fastened to the first fastener to connect the housing and the circuit board, wherein the first fastener is electrically connected to a conductive contact on the circuit board.

[0012] Preferably, the end of the first fastener facing away from the circuit board is embedded in the housing and has an end face that protrudes from the housing for electrical connection with external components.

[0013] Preferably, the first fastener is provided with an anti-detachment part, which is used to increase the bonding strength between the first fastener and the housing.

[0014] Preferably, the first fastener is integrally injection molded with the housing, the thickness of the housing at the location corresponding to the first fastener is greater than the thickness of the rest of the housing, and a slit is provided on the outer peripheral surface of the first fastener to prevent the first fastener from rotating when a part of the first fastener is embedded in the housing.

[0015] Preferably, the first fastener is a metal conductive pillar with a screw hole, and the second fastener is a screw.

[0016] Preferably, the conductive contact is disposed on the upper surface of the circuit board and adjacent to the fixing hole, and when the first fastener and the second fastener are tightened, the end of the first fastener facing the circuit board abuts against the conductive contact.

[0017] Preferably, the first fastener has an extension at one end facing the circuit board, the extension being accommodated within the fixing hole. The conductive contact is located on the upper surface of the circuit board and the inner wall of the fixing hole. When the first fastener and the second fastener are tightened, the end of the first fastener facing the circuit board abuts against the conductive contact on the upper surface of the circuit board, and the second fastener abuts the extension against the inner wall of the fixing hole so that the extension abuts against the conductive contact on the inner wall of the fixing hole.

[0018] Preferably, the extension is a continuous or discontinuous annular structure, the opening of the extension toward the lower surface of the circuit board is a gradually expanding opening, and the outer peripheral surface of the second fastener is provided with an inclined surface that matches the gradually expanding opening of the extension.

[0019] Preferably, the electronic device further includes a conductive spring, the conductive spring including a horizontal ring portion, the conductive contact being disposed on the upper surface of the circuit board and adjacent to the fixing hole, and when the first fastener and the second fastener are tightened, the horizontal ring portion of the conductive spring is sandwiched between the end of the first fastener facing the circuit board and the conductive contact.

[0020] Preferably, a portion of the conductive contact extends onto the inner wall of the fixing hole, and the conductive spring also includes a vertical ring portion for attaching to the conductive contact on the inner wall of the fixing hole. When the first fastener and the second fastener are tightened, the vertical ring portion of the conductive spring is sandwiched between the second fastener and the conductive contact in the fixing hole.

[0021] Preferably, the connection between the horizontal ring portion and the vertical ring portion of the conductive spring is provided with a plurality of spaced perforated holes, the perforated holes extending to the edges of the horizontal ring portion and the edges of the vertical ring portion.

[0022] Preferably, the height of the vertical ring portion of the conductive spring along the depth direction of the fixing hole is greater than or equal to the depth of the fixing hole, and the vertical ring portion of the conductive spring is provided with a deformable portion located between the hollow holes and protruding toward the inner wall of the fixing hole.

[0023] Preferably, the horizontal ring portion of the conductive spring is provided with at least one conductive contact protruding away from the upper surface of the circuit board to abut against the elastic protrusion of the first fastener, and the vertical ring portion of the conductive spring is provided with at least one conductive contact protruding towards the inner wall of the fixing hole to abut against the elastic protrusion of the conductive contact.

[0024] Preferably, the fixing hole is a stepped hole, which includes an upper hole adjacent to the upper surface of the circuit board and a lower hole adjacent to the lower surface of the circuit board, wherein the diameter of the upper hole is larger than the diameter of the lower hole;

[0025] When the first fastener and the second fastener are tightened, the end of the first fastener facing the circuit board is accommodated in the upper hole and abuts against the conductive contact located on the inner wall and surface of the upper hole.

[0026] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0027] By setting a first fastener to conduct electricity, and then passing a second fastener through a fixing hole on the circuit board and fastening it to the first fastener, the circuit board can be fixed in the housing. The conductive contact is set at the fixing hole and electrically connected to the first fastener. The above structure not only improves the space utilization within the housing, but also eliminates the need for soldering operations on the circuit board, reducing production costs and the risk of circuit board deformation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the external structure of an existing electronic device;

[0029] Figure 2 This is a schematic diagram of the internal structure of an existing electronic device;

[0030] Figure 3 This is a cross-sectional schematic diagram of the electronic device according to Embodiment 1 of the present invention;

[0031] Figure 4 yes Figure 3 Enlarged schematic diagram of the structure of section A in the middle;

[0032] Figure 5 This is an exploded schematic diagram of the electronic device according to Embodiment 1 of the present invention;

[0033] Figure 6 This is a cross-sectional schematic diagram of the electronic device according to Embodiment 2 of the present invention;

[0034] Figure 7 yes Figure 6 Enlarged schematic diagram of the structure of section B in the middle;

[0035] Figure 8 This is a schematic diagram of the structure of the first fastener in Embodiment 2 of the present invention;

[0036] Figure 9 This is a cross-sectional schematic diagram of the electronic device according to Embodiment 3 of the present invention;

[0037] Figure 10 yes Figure 9 Enlarged schematic diagram of the C-section structure;

[0038] Figure 11 This is a schematic diagram of the structure of the first fastener in Embodiment 3 of the present invention;

[0039] Figure 12 This is a cross-sectional schematic diagram of the electronic device of Embodiment 4 of the present invention, in which a second type of conductive spring is disposed;

[0040] Figure 13 yes Figure 12 Enlarged schematic diagram of the structure of section D in the middle;

[0041] Figure 14 This is a schematic diagram of the structure of the first type of conductive spring in Embodiment 4 of the present invention;

[0042] Figure 15 This is a schematic diagram of the structure of the second type of conductive spring sheet in Embodiment 4 of the present invention;

[0043] Figure 16 This is a cross-sectional schematic diagram of the electronic device of Embodiment 4 of the present invention, in which a first type of conductive spring is provided and a second fastener is tightened in place.

[0044] Figure 17 yes Figure 16 Enlarged schematic diagram of the middle F section structure;

[0045] Figure 18This is a cross-sectional schematic diagram of the electronic device of Embodiment 4 of the present invention, in which a first type of conductive spring is provided and the second fastener is not tightened in place.

[0046] Figure 19 yes Figure 18 Enlarged schematic diagram of the G-section structure;

[0047] Figure 20 This is a cross-sectional schematic diagram of the electronic device according to Embodiment 5 of the present invention;

[0048] Figure 21 yes Figure 20 Enlarged schematic diagram of the structure of section E in the middle;

[0049] Figure 22 This is a schematic diagram of the circuit board structure in Example 5;

[0050] Figure 23 These are schematic diagrams of the circuit boards in Examples 1 to 4.

[0051] In the diagram: 1. Housing; 3. First fastener; 4. Second fastener; 5. Fixing hole; 6. Groove; 7. Cutout; 8. Chamfer; 9. Conductive contact; 10. Extension; 11. Conductive spring; 12. Horizontal ring; 13. Vertical ring; 14. Hole; 15. Deformable part; 16. Elastic protrusion; 17. Circuit board; 100. Metal pillar; 200. Pin; 201. Screw; 171. Upper hole; 172. Lower hole. Detailed Implementation

[0052] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided to make the invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0053] The terms used to express position and direction in this invention are illustrated with reference to the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this invention.

[0054] This invention provides an electronic device, comprising: a housing 1, a circuit board 17, a first fastener 3, and a second fastener 4. The external structure of the electronic device of this invention is similar to... Figure 1 The structures shown are basically the same. Example 1

[0055] like Figure 3 , Figure 4 , Figure 5 and Figure 23As shown, the circuit board 17 has opposing upper and lower surfaces and a fixing hole 5 penetrating both surfaces. A conductive contact 9 electrically connected to the circuit board 17 is provided at the fixing hole 5. The conductive contact 9 can be a contact (PAD) connected to a conductive line on the circuit board 17. A first fastener 3 is fixedly connected to the housing 1 and is a conductive component with conductive properties. A second fastener 4 passes through the fixing hole 5 and is fastened to the first fastener 3 to connect the housing 1 and the circuit board 17. The first fastener 3 electrically connects to the conductive contact 9 on the circuit board 17. The electronic device can be a consumer electronic device such as a wristband, watch, or mobile phone. One end of the first fastener 3 facing away from the second fastener 4 is embedded in the housing 1 and has an end face protruding from the housing 1 for electrical connection with external components (such as chargers, data cables, etc.) to achieve the function of charging or data transmission. Specifically, compared to the prior art of soldering the pins 200 to the circuit board 17... The conductive contact 9 on the upper back is pressed into contact with the metal pillar 100. The conductive contact 9 on the back of the circuit board 17 is close to the plastic pillar, making pre-soldering difficult during soldering. The electronic device in this application does not need to set pins 200 and plastic pillars. The first fastener 3 is equivalent to the metal pillar 100. The first fastener 3 is used to charge the electronic device or transmit data after contacting the external charging head. The circuit board 17 can be fixed in the housing 1 by passing through the fixing hole 5 on the circuit board 17 and fastening it to the first fastener 3. The conductive contact 9 is set at the fixing hole 5 and electrically connected to the first fastener 3. The first fastener 3 and the conductive contact 9 can form an electrical connection by direct contact, without the need for soldering, which is convenient for later maintenance. The above structure not only improves the space utilization rate inside the housing 1, but also eliminates the need for soldering on the circuit board 17, reducing production costs and the risk of deformation of the circuit board 17.

[0056] As a further embodiment, in order to improve the bonding strength between the first fastener 3 and the housing 1, a portion of the first fastener 3 is embedded in the housing 1.

[0057] As a further embodiment, in order to reduce the possibility of separation between the first fastener 3 and the housing 1, the first fastener 3 is provided with an anti-detachment part, which is used to increase the bonding strength between the first fastener 3 and the housing 1.

[0058] As a further embodiment, the anti-detachment part is a groove 6 or a protrusion on the outer surface of the first fastener 3. In this application, the groove 6 is preferred. Specifically, the housing 1 is provided with a through hole corresponding to the position of the first fastener 3. When the first fastener 3 is inserted into the through hole, the limiting part in the through hole is located in the groove 6 of the first fastener 3, thereby restricting the movement of the first fastener 3 and improving the stability of the first fastener 3.

[0059] As a further embodiment, in order to further increase the bonding strength between the first fastener 3 and the housing 1, the first fastener 3 and the housing 1 are integrally injection molded. The thickness of the housing 1 at the location corresponding to the first fastener 3 is greater than the thickness of the rest of the housing 1. A notch 7 is provided on the outer peripheral surface of the first fastener 3. The notch 7 can be located in the groove 6 or on the other outer peripheral surface of the first fastener 3. Since the first fastener 3 and the housing 1 are integrally injection molded, and after the notch 7 is provided on the outer peripheral surface of the first fastener 3, when a part of the first fastener 3 is embedded in the through hole on the housing 1, the first fastener 3 cannot rotate. This avoids the situation where the first fastener 3 in the electronic device becomes loose and cannot charge the electronic device, thereby improving the bonding strength between the first fastener 3 and the housing 1.

[0060] As a further embodiment, the first fastener 3 is a conductive post with a screw hole, made of, for example, copper, and the second fastener 4 is a screw made of, for example, copper or stainless steel. Specifically, the function of the conductive post is the same as that of the pin 200 after contact with the metal post 100 in the prior art. Compared with the prior art, which requires the pin 200, metal post 100 and plastic post to be set inside the housing 1, this application only needs to set the conductive post to realize the function of fixing the circuit board 17 inside the housing 1 and for electrical connection with the external charging head. In this application, after the conductive post is provided with a screw hole, the second fastener 4 can pass through the fixing hole 5 on the circuit board 17 and then be screwed into the screw hole, which is also very convenient.

[0061] As a further embodiment, the opening of the screw hole of the first fastener 3 is provided with a chamfer 8 for guiding the screw when it enters. The chamfer 8 makes it easier for workers to insert the screw into the screw hole, thus improving the convenience of assembling the electronic device.

[0062] As a further embodiment, the conductive contact 9 is disposed on the upper surface of the circuit board 17 and adjacent to the fixing hole 5. When the first fastener 3 and the second fastener 4 are tightened, the end of the first fastener 3 facing the circuit board 17 abuts against the conductive contact 9. The conductive contact 9 can be made of copper and is formed on the circuit board 17 by electroplating or printing to be electrically connected to the metal lines (not shown) on the circuit board 17. When the first fastener 3 and the second fastener 4 are tightened, the conductive contact 9 forms direct contact with the first fastener 3, which improves conductivity and enhances the charging stability of the electronic device. Example 2

[0063] like Figure 6 , Figure 7 and Figure 8As shown, Embodiment 2 is identical to Embodiment 1 in all other aspects except that the first fastener 3 has an extension 10 at one end facing the circuit board 17. The extension 10 is accommodated in the fixing hole 5. The conductive contact 9 is located on the upper surface of the circuit board 17 and the inner wall of the fixing hole 5. Specifically, when the first fastener 3 is installed on the circuit board 17, the extension 10 enters the corresponding fixing hole 5 to form a preliminary positioning of the first fastener 3. When the second fastener 4 is screwed into the screw hole of the first fastener 3 and the circuit board 17 is fixed in the housing 1, the end of the first fastener 3 facing the circuit board 17 abuts against the conductive contact 9 on the upper surface of the circuit board 17. After the second fastener 4 is inserted into the fixing hole 5 on the circuit board 17, the second fastener 4 pushes the extension 10 on the first fastener 3 outward and abuts against the inner wall of the fixing hole 5 so that the extension 10 abuts against the conductive contact 9 on the inner wall of the fixing hole 5. Through the above structure, a three-dimensional contact is formed between the first fastener 3 and the conductive contact 9, thereby increasing the contact area and improving the reliability of the electrical connection. Example 3

[0064] like Figure 9 , Figure 10 and Figure 11 As shown, the other structures of Embodiment 3 are the same as those of Embodiment 2, except that the extension 10 is a continuous or discontinuous annular structure, and the opening of the extension 10 toward the lower surface of the circuit board 17 is a gradually expanding opening. The outer peripheral surface of the second fastener 4 is provided with an inclined surface that cooperates with the gradually expanding opening of the extension 10. When the second fastener 4 is screwed into the screw hole in the first fastener 3, the inclined surface of the second fastener 4 abuts against the gradually expanding opening of the extension 10, thereby improving the bonding force between the extension 10 of the first fastener 3 and the part of the conductive contact 9 located in the fixing hole 5, and further improving the reliability of the electrical connection. Example 4

[0065] like Figures 12 to 19 and Figure 23 As shown, the structure of Embodiment 4 is the same as that of Embodiment 1, except that the electronic device also includes a conductive spring 11. The conductive spring 11 includes a horizontal ring portion 12. The conductive contact 9 is disposed on the upper surface of the circuit board 17 and adjacent to the fixing hole 5. Specifically, when the first fastener 3 and the second fastener 4 are fastened, the horizontal ring portion 12 of the conductive spring 11 is sandwiched between the end of the first fastener 3 facing the circuit board 17 and the conductive contact 9, thereby improving the reliability of the electrical connection between the first fastener 3 and the conductive contact 9.

[0066] As a further embodiment of Example 4, a portion of the conductive contact 9 extends onto the inner wall of the fixing hole 5. The conductive spring 11 also includes a vertical ring portion 13 for attaching to the inner wall of the conductive contact 9 on the fixing hole 5. When the first fastener 3 and the second fastener 4 are tightened, the vertical ring portion 13 of the conductive spring 11 is sandwiched between the second fastener 4 and the conductive contact 9 in the fixing hole 5. Specifically, the vertical ring portion 13 of the conductive spring 11 can be interference-fitted into the fixing hole 5, thereby abutting against the portion of the conductive contact 9 located in the fixing hole 5, so that the electrical connection between the conductive spring 11, the conductive contact 9, and the first fastener 3 is more reliable, and the conductivity and reliability are improved.

[0067] like Figure 14 , Figures 16 to 19 As shown, in the first embodiment of the conductive spring 11 in Example 4, a plurality of spaced perforated holes 14 are provided at the connection between the horizontal ring portion 12 and the vertical ring portion 13 of the conductive spring 11. The perforated holes 14 do not extend to the edge of the horizontal ring portion 12 and the edge of the vertical ring portion 13. The perforated holes 14 ensure that when the conductive spring 11 is inserted into the fixing hole 5, the interference fit between it and the fixing hole 5 will not damage the conductive spring 11, thereby improving the service life of the conductive spring 11.

[0068] As a further embodiment of the first structure of the conductive spring 11 in Example 4, when the conductive spring 11 is inserted into the circuit board 17 and the second fastener 4 is not tightened with the first fastener 3, the vertical ring portion 13 of the conductive spring 11 is in a natural state (see reference). Figure 19 The height of the vertical ring 13 along the depth direction of the fixing hole 5 is greater than the depth of the fixing hole 5. At this time, the holding force between the vertical ring 13 and the conductive contact 9 on the inner wall of the fixing hole 5 is relatively weak. After the second fastener 4 is inserted into the fixing hole 5 from the lower surface of the circuit board 17 and tightened with the first fastener 3 (see [reference]). Figure 17The second fastener 4 drives the vertical ring portion 13 to expand outward from bottom to top, thereby increasing the holding force between the vertical ring portion 13 and the conductive contact 9 on the inner wall of the fixing hole 5, making the two more tightly connected, the electrical connection more reliable, and the effect better. The vertical ring portion 13 of the conductive spring piece 11 is provided with a deformable portion 15 protruding towards the inner wall of the fixing hole 5. Specifically, the deformable portion 15 deforms when squeezed. When the second fastener 4 and the first fastener 3 are tightened, the lower edge of the vertical ring portion 13 protruding from the fixing hole 5 of the circuit board 17 is bent and deformed in the radial direction along the fixing hole 5 under the upward pressure of the second fastener 4, and then abuts against the conductive contact 9 on the inner wall of the fixing hole 5. This further increases the bonding force between the conductive spring piece 11 and the conductive contact 9 located in the fixing hole 5, so that the electrical connection between the conductive spring piece 11, the conductive contact 9, and the first fastener 3 is more reliable, and the conductivity and reliability are improved. Of course, during the manufacturing process, the height of the vertical ring portion 13 of the conductive spring 11 along the depth direction of the fixing hole 5 can be made equal to the depth of the fixing hole 5, and the second fastener 4 can be used to set it as follows: Figure 10 As the inclined surface structure shown increases with the degree of upward tightening, the second fastener 4 directly drives the deformable portion 15 of the vertical ring portion 13 to expand and deform outward to increase the holding force, thereby improving the reliability of the electrical connection between the conductive spring 11, the conductive contact 9, and the first fastener 3.

[0069] like Figure 12 , Figure 13 and Figure 15 As shown, in the second embodiment of the conductive spring 11 in Example 4, the horizontal ring portion 12 of the conductive spring 11 is provided with at least one elastic protrusion 16 protruding from the conductive contact 9 facing away from the upper surface of the circuit board. The vertical ring portion 13 of the conductive spring 11 is provided with at least one elastic protrusion 16 protruding towards the conductive contact 9. When the first fastener 3 and the second fastener 4 are engaged, the elastic protrusion 16 on the vertical ring portion 13 causes the conductive spring 11 to be interference-fitted in the fixing hole 5. The conductive spring 11 will not be hard squeezed with the fixing hole 5, thus preventing damage to the conductive spring 11 or the portion of the conductive contact 9 located in the fixing hole 5. At the same time, it can further increase the bonding strength between the conductive spring 11, the conductive contact 9 and the first fastener 3, so that the electrical connection between the conductive spring 11, the conductive contact 9 and the first fastener 3 is more reliable, and the conductivity and reliability are improved. Example 5

[0070] like Figure 20 , Figure 21 and Figure 22As shown, the structure of Embodiment 5 is the same as that of Embodiment 1 in all other aspects, except that the fixing hole 5 is a stepped hole. The stepped hole includes an upper hole 171 adjacent to the upper surface of the circuit board 17 and a lower hole 172 adjacent to the lower surface of the circuit board 17. The diameter of the upper hole 171 is larger than that of the lower hole 172. Specifically, the fixing hole 5 is a countersunk hole structure. The conductive contact 9 is attached to the inner wall and bottom surface of the upper hole 171. When the first fastener 3 and the second fastener 4 are tightened, the end of the first fastener 3 facing the circuit board 17 is accommodated in the upper hole 171 and abuts against the conductive contact 9 located on the inner wall and bottom surface of the upper hole 171. It should be noted that a part of the first fastener 3 is also located in the upper hole 171. The above structure not only increases the contact area between the first fastener 3 and the conductive contact 9 and improves the reliability of the electrical connection between the two, but also limits the position of the first fastener 3, which facilitates the initial positioning and alignment of the first fastener 3 when it is installed on the circuit board 17, and reduces the occurrence of loosening in the horizontal direction, thereby improving the connection reliability of the electronic device. Of course, a downwardly extending extension can also be provided at the lower end of the first fastener 3. The inner wall of the lower hole 172 is also provided with a conductive contact 9. The extension is located at the conductive contact 9 on the inner wall of the lower hole 172 and is electrically connected to the conductive contact 9, which increases the contact area between the first fastener 3 and the conductive contact 9 and improves the electrical transmission performance.

[0071] As a further embodiment of Embodiments 1 to 5, the electronic device includes a plurality of first fasteners 3 and a plurality of second fasteners 4. A plurality of fixing holes 5 are provided on the circuit board 17. Each first fastener 3 is respectively engaged with a second fastener 4 and a fixing hole 5. The number of first fasteners 3, second fasteners 4 and fixing holes 5 is based on actual needs, so as to ensure that the space utilization rate inside the housing 1 can be maximized, and the circuit board 17 can be stably fixed inside.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the invention without departing from the principles and spirit of the invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. An electronic device, characterized in that, include: case; A circuit board having opposing upper and lower surfaces and mounting holes penetrating the upper and lower surfaces, wherein the circuit board is provided with conductive contacts for electrical connection at the mounting holes; The first fastener is fixedly connected to the housing and serves as a conductive component; A second fastener passes through the fixing hole and is fastened to the first fastener to connect the housing and the circuit board, wherein the first fastener is electrically connected to a conductive contact on the circuit board. A conductive spring includes a horizontal ring portion and a vertical ring portion for attaching to a conductive contact on the inner wall of the fixing hole. When the first fastener and the second fastener are fastened, the horizontal ring portion of the conductive spring is sandwiched between the end of the first fastener facing the circuit board and the conductive contact, and the vertical ring portion of the conductive spring is sandwiched between the second fastener and the conductive contact in the fixing hole. In its natural state, the height of the vertical ring portion of the conductive spring along the depth direction of the fixing hole is greater than the depth of the fixing hole; the vertical ring portion of the conductive spring is provided with a deformable portion located between the hollow holes and protruding toward the inner wall of the fixing hole; when the second fastener is fastened to the first fastener, the second fastener presses upward against the lower edge of the fixing hole of the circuit board exposed by the vertical ring portion and drives the deformable portion of the vertical ring portion to deform, so as to increase the bonding force between the deformable portion and the conductive contact; The first fastener has an extension at one end facing the circuit board. The extension is accommodated in the fixing hole. The extension is a discontinuous annular structure. The conductive contact is located on the upper surface of the circuit board and the inner wall of the fixing hole. When the first fastener and the second fastener are tightened, the end of the first fastener facing the circuit board abuts against the conductive contact on the upper surface of the circuit board. The second fastener pushes the extension outward and abuts against the inner wall of the fixing hole so that the extension abuts against the conductive contact on the inner wall of the fixing hole. The opening of the extension toward the lower surface of the circuit board is a gradually widening opening, and the outer peripheral surface of the second fastener is provided with an inclined surface that matches the gradually widening opening of the extension.

2. The electronic device according to claim 1, characterized in that, The first fastener has one end facing away from the circuit board embedded in the housing and has an end face protruding from the housing for electrical connection with external components.

3. The electronic device according to claim 2, characterized in that, The first fastener is provided with an anti-detachment part, which is used to increase the bonding strength between the first fastener and the shell.

4. The electronic device according to claim 2, characterized in that, The first fastener is integrally injection molded with the housing. The thickness of the housing at the location corresponding to the first fastener is greater than the thickness of the rest of the housing. A cut is provided on the outer peripheral surface of the first fastener. The cut is used to prevent the first fastener from rotating when a part of the first fastener is embedded in the housing.

5. The electronic device according to claim 1, characterized in that, The first fastener is a metal conductive pillar with a screw hole, and the second fastener is a screw.

6. The electronic device according to claim 5, characterized in that, The conductive contact is disposed on the upper surface of the circuit board and adjacent to the fixing hole. When the first fastener and the second fastener are tightened, the end of the first fastener facing the circuit board abuts against the conductive contact.

7. The electronic device according to claim 1, characterized in that, The connection between the horizontal and vertical ring portions of the conductive spring sheet is provided with multiple spaced perforations, which extend to the edges of the horizontal and vertical ring portions.

8. The electronic device according to claim 1, characterized in that, The horizontal ring portion of the conductive spring sheet is provided with at least one conductive contact protruding away from the upper surface of the circuit board to abut against the elastic protrusion of the first fastener, and the vertical ring portion of the conductive spring sheet is provided with at least one conductive contact protruding towards the inner wall of the fixing hole to abut against the elastic protrusion of the conductive contact.

9. The electronic device according to claim 1, characterized in that, The fixing hole is a stepped hole, which includes an upper hole adjacent to the upper surface of the circuit board and a lower hole adjacent to the lower surface of the circuit board, wherein the diameter of the upper hole is larger than the diameter of the lower hole. When the first fastener and the second fastener are tightened, the end of the first fastener facing the circuit board is accommodated in the upper hole and abuts against the conductive contact located on the inner wall and surface of the upper hole.

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