Structure for connecting PCB (printed circuit board) with power supply

Abstract

The utility model relates to the technical field of PCB (Printed Circuit Board) production, and aims to solve the technical problem that the connection between a PCB and a power supply is unreliable. In order to solve the technical problem, the utility model provides a structure for connecting the PCB and the power supply. The reed comprises an elastic body with an elastic back bend, a welding part and a contact part, wherein the welding part and the contact part are connected to the two ends of the elastic body; the welding part comprises a welding piece and a connecting piece; a U-shaped structure is defined by the two welding pieces and the connecting piece, and an opening of the U-shaped structure faces the PCB; one of the two welding pieces is connected with the elastic body; bonding pads are symmetrically arranged on the front surface and the back surface of the PCB, and a notch is formed in the PCB; the reed is perpendicular to the PCB, the two welding pieces are welded to the two bonding pads respectively, and the connecting piece is located in the notch; and the contact part is in contact with a first contact on the power supply. According to the utility model, the connection reliability of the PCB and the power supply is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board production, in particular to a structure for connecting a PCB board to a power supply. Background Art

[0002] As a component of a complete device, a PCB board basically cannot form an electronic product, and there must be problems of external connection. For example, electrical connections are required between PCB boards, between a PCB board and external components, and between a PCB board and a device panel. Selecting a connection with the best combination of reliability, processability, and economy is one of the important contents of printed board design.

[0003] Common connection methods for connecting a PCB board to a power supply include welding and connecting through connectors, etc. In the prior art, there are problems that the connection between the PCB board and the power supply is unreliable, and two conduction failures will occur after long-term use. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the above problems existing in the prior art.

[0005] To solve the above technical problem, the utility model provides a structure for connecting a PCB board to a power supply, including: a reed, including an elastic body with an elastic bend-back, welding parts and contact parts connected to both ends of the elastic body; the welding parts include two welding pieces arranged in parallel with each other and a connecting piece vertically connected between the two welding pieces; the two welding pieces and the connecting piece enclose a U-shaped structure, and the opening of the U-shaped structure faces the PCB board; one of the two welding pieces is connected to the elastic body, and the elastic body forms a predetermined angle with the welding part;

[0006] The front and back sides of the PCB board are symmetrically provided with pads, and a notch is opened at a position on the PCB board close to the pads;

[0007] The power supply is provided with a first contact;

[0008] Wherein, the reed is vertically arranged with respect to the PCB board, the two welding pieces are respectively welded to the two pads, and the connecting piece is located in the notch; the contact part contacts the first contact.

[0009] In an embodiment of the utility model, the contact part includes an intermediate transition connecting piece arranged in parallel with the welding piece and a contact piece, and the intermediate transition connecting piece is connected between the elastic body and the contact piece.

[0010] In an embodiment of the utility model, the contact piece includes an inclined section, the inclined section is connected to the end of the intermediate transition connecting piece, and the inclined section inclines outward from the intermediate transition connecting piece to the welding piece.

[0011] In an embodiment of the present utility model, the contact member further includes a vertical section connected to the end of the inclined section, and the vertical section contacts the first contact on the power supply.

[0012] In an embodiment of the present utility model, the reed is made of brass.

[0013] In an embodiment of the present utility model, at least one second contact is provided along the width direction of the contact portion, and the second contact contacts the first contact; the surface of the second contact is gold-plated.

[0014] In an embodiment of the present utility model, first through holes penetrating through the wall bodies are correspondingly provided on the two pads, and second through holes penetrating through the wall body of the PCB board and communicating with the first through holes are also provided on the PCB board.

[0015] In an embodiment of the present utility model, the connection position between the welding member and the elastic body is connected by a fillet transition.

[0016] In an embodiment of the present utility model, the connecting member is welded to the inner wall of the notch.

[0017] In an embodiment of the present utility model, a plurality of through holes penetrating through the wall body are provided on the welding member, and the plurality of through holes are arranged in an array.

[0018] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0019] For the structure of the PCB board of the present utility model connected to the power supply, the reed can be elastically bent back, thereby ensuring reliable contact between the reed and the power supply to achieve conduction between the two. The two welding members in the reed are welded to the pads to ensure the connection reliability between the pads and the reed in the PCB board. In addition, the connecting member of this embodiment is located in the notch. On the one hand, it ensures the rapid alignment of the welding member and the pad, improving the welding efficiency; on the other hand, it limits the reed during the welding process to prevent it from shifting and affecting the welding quality, thereby ensuring the welding quality. Secondly, during use, the welding part is restricted in the notch during multiple elastic bending processes of the reed, avoiding the displacement of the welding part due to the elastic bending of the reed and affecting the connection failure between the welding member and the pad, thereby further realizing the long-term connection stability and reliability between the reed and the PCB board. It can be seen that this embodiment ensures the connection reliability between the PCB board and the power supply, and can ensure the reliability of their long-term connection; in addition, it can also improve the connection efficiency between the PCB board and the power supply. Description of the Drawings

[0020] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in conjunction with the attached drawings, where:

[0021] Figure 1Schematic of a structure for connecting a PCB board to a power supply in a preferred embodiment of the present utility model Figure 1 ;

[0022] Figure 2 Is Figure 1 Schematic diagram of another perspective of the structure for connecting the PCB board to the power supply;

[0023] Figure 3 Is Figure 1 Front view of the reed in the structure for connecting the PCB board to the power supply;

[0024] Figure 4 Is Figure 1 Three-dimensional schematic of the reed in the structure for connecting the PCB board to the power supply Figure 1 ;

[0025] Figure 5 Is Figure 1 Three-dimensional schematic of the reed in the structure for connecting the PCB board to the power supply Figure 2 ;

[0026] Explanation of reference numerals in the drawings of the specification: 100, reed; 110, elastic body; 120, welding part; 121, welding piece; 1211, through hole; 122, connecting piece; 130, contact part; 131, intermediate transition connecting piece; 132, contact piece; 1321, inclined section; 1322, vertical section; 1323, second contact; 140, rounded corner;

[0027] 200, PCB board; 210, pad; 220, notch;

[0028] 300, power supply; 310, first contact. Detailed implementation manners

[0029] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the specific embodiments cited are not intended to limit the present utility model.

[0030] Refer to Figures 1 to 5As shown in the figure, an embodiment of the present utility model provides a structure for connecting a PCB board to a power supply, including: a reed 100; the reed 100 includes an elastic body 110 with an elastic bend, welding parts 120 and contact parts 130 connected to both ends of the elastic body 110; the welding parts 120 include two welding pieces 121 arranged in parallel with each other and a connecting piece 122 vertically connected between the two welding pieces 121; the two welding pieces 121 and the connecting piece 122 enclose a U-shaped structure, and the opening of the U-shaped structure faces the PCB board 200; one of the two welding pieces 121 is connected to the elastic body 110, and the elastic body 110 and the welding part 120 form a predetermined angle α; the predetermined angle α can be 60 to 75 degrees.

[0031] The front and back sides of the PCB board 200 are symmetrically provided with pads 210, and a notch 220 is opened at a position on the PCB board 200 close to the pads 210;

[0032] The power supply 300 is provided with a first contact 310;

[0033] Among them, the reed 100 is vertically arranged with respect to the PCB board 200, the two welding pieces 121 are respectively welded to the two pads 210, and the connecting piece 122 is located in the notch 220; the contact part 130 is in contact with the first contact 310.

[0034] Specifically, the reed 100 in this embodiment can be elastically bent to ensure reliable contact between the reed 100 and the power supply 300 to achieve conduction between the two. The two welding pieces 121 in the reed 100 are welded to the pads 210 to ensure the connection reliability between the pads 210 in the PCB board 200 and the reed 100. In addition, the connecting piece 122 in this embodiment is located in the notch 220. On the one hand, it ensures the quick alignment of the welding pieces 121 and the pads 210, improving the welding efficiency; on the other hand, it limits the reed 100 during the welding process to prevent its displacement from affecting the welding quality, thus ensuring the welding quality; secondly, during use, the welding part 120 is restricted in the notch 220 during multiple elastic bends of the reed 100, avoiding the displacement of the welding part 120 caused by the elastic bend of the reed 100 from affecting the connection failure between the welding piece 121 and the pad 210, thereby further realizing the long-term connection stability and reliability between the reed 100 and the PCB board 200. It can be seen that this embodiment ensures the connection reliability between the PCB board 200 and the power supply 300 and can ensure the reliability of their long-term connection; in addition, it can also improve the connection efficiency between the PCB board 200 and the power supply 300, realizing quick connection while reducing costs.

[0035] Further, the contact portion 130 includes an intermediate transition connecting member 131 disposed parallel to the welding member 121 and a contact member 132. The intermediate transition connecting member 131 is connected between the elastic body 110 and the contact member 132. The contact member 132 includes an inclined section 1321. The inclined section 1321 is connected to the end of the intermediate transition connecting member 131, and the inclined section 1321 inclines outward from the intermediate transition connecting member 131 to the welding member 121. Specifically, the inclined section 1321 provided in this embodiment enables the reed 100 to have better elastic resilience performance.

[0036] Further, the contact member 132 further includes a vertical section 1322 connected to the end of the inclined section 1321. The vertical section 1322 contacts the first contact 310 on the power supply 300. Specifically, the vertical section 1322 provided in this embodiment further ensures the stable and reliable contact between the vertical section 1322 and the first contact 310.

[0037] Further, the reed 100 is made of brass. Specifically, in this embodiment, while being able to play a conduction role, it can also have good elastic bending ability.

[0038] Referring to Figure 5 As shown, further, at least one second contact 1323 is provided along the width direction of the vertical section 1322 of the contact portion 130. The second contact 1323 contacts the first contact 310; the surface of the second contact 1323 is gold-plated. Since copper is prone to oxidation, if the contact portion 130 made of brass contacts the first contact 310 for a long time, it is easy to cause the contact resistance between the contact portion 130 and the first contact 310 to increase, resulting in heat generation at the contact position between the two, and ultimately leading to a poor contact effect. To solve this problem, in this embodiment, a gold-plated second contact 1323 is provided on the contact portion 130 to contact the first contact 310, ensuring the stable and reliable contact between the contact portion 130 and the first contact 310 at low cost.

[0039] Further, first vias penetrating through the wall bodies are correspondingly provided on the two pads 210, and second vias penetrating through the wall body of the PCB board 200 and communicating with the first vias are also provided on the PCB board 200. That is to say, the two pads 210 are interconnected through the first vias and the second vias. Since the reed 100 will pull the pads 210 when stressed, this will cause the pads 210 to warp and separate from the PCB board 200. To solve this problem, in this embodiment, the first vias and the second vias are provided. In this way, when welding the pads 210 and the welding members 121, tin will pour into the first vias and the second vias, so that the two pads 210 and the PCB board 200 are further connected more stably, increasing the adhesion between the pads 210 and the PCB board 200.

[0040] Furthermore, at the connection position between the welded part 121 and the elastic body 110, a fillet 140 is used for transitional connection. Since the force point of the elastic body 110 to rebound is at this position, if it is a sharp corner here, after multiple rebounds, it will fatigue and cause the elastic body 110 to not rebound to the original state, and in severe cases, it will break. Therefore, in this embodiment, a fillet 140 is used for transitional connection at this position.

[0041] Referring Figures 4 to 5 As shown, furthermore, a plurality of through holes 1211 penetrating the wall of the welded part 121 are provided, and the plurality of through holes 1211 are arranged in an array. When the solder pad 210 and the welded part 121 are welded, it is necessary to ensure that the solder flows to the entire surface where the two are in contact (the welding area is relatively large) so as to ensure the stability and reliability of welding. However, during welding, welding can only be carried out from the periphery where the two are in contact, so the solder can only flow from the periphery to the inside, and in some positions, the solder cannot flow through, resulting in incomplete welding in some positions. Therefore, in this embodiment, the through holes 1211 are provided, so that the solder can be poured into the contact surface of the two from the periphery and the positions of the through holes 1211 at the same time, thereby ensuring the welding quality.

[0042] Furthermore, the connecting part 122 is welded to the inner wall of the notch 220. Specifically, in this embodiment, the connection reliability between the PCB board 200 and the power supply 300 is further ensured.

[0043] Referring Figures 4 to 5 As shown, furthermore, a plurality of through holes penetrating the wall of the connecting part 122 are provided. The function of these through holes is the same as that of the through holes 1211 on the welded part 121, and will not be elaborated here.

[0044] The distance between the inner walls of the other welded part 121 is 0.1 mm - 0.3 mm larger than the thickness of the PCB board 200.

[0045] Currently, the present application has practical applications in noise source products. Through trial use, by adopting the present application, the production cost of batch products can be reduced by 80%, and the requirement for the component matching accuracy is greatly reduced. Thus, it can be seen that the present application is suitable for mass production.

[0046] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A structure for connecting a PCB board to a power supply, characterized in that: include: The spring sheet comprises an elastic body with elastic rebend, a welding part and a contact part connected to two ends of the elastic body; the welding part comprises two welding pieces arranged in parallel with each other and a connecting piece vertically connected between the two welding pieces; the two welding pieces and the connecting piece are arranged to form a U-shaped structure, and the opening of the U-shaped structure is arranged toward the PCB board; one of the two welding pieces is connected to the elastic body, and the elastic body and the welding part form a predetermined angle; The front and back surfaces of the PCB board are symmetrically provided with solder pads, and the PCB board is provided with notches at positions close to the solder pads; The power supply is provided with a first contact; The spring sheet is vertically arranged to the PCB board, the two welding parts are respectively welded to the two welding pads, the connecting part is located in the notch; and the contact part is in contact with the first contact point.

2. The structure for connecting a PCB board to a power source according to claim 1, characterized in that: The contact portion includes an intermediate transition connecting piece and a contact piece which are arranged in parallel with the welding piece, and the intermediate transition connecting piece is connected between the elastic body and the contact piece.

3. The structure for connecting a PCB board to a power source according to claim 2, characterized in that: The contact piece includes an inclined section, the inclined section is connected to the end of the intermediate transition connecting piece, and the inclined section is inclined outward from the intermediate transition connecting piece to the welding piece.

4. The structure for connecting a PCB board to a power source according to claim 3, characterized in that: The contact member further includes a vertical section connected to an end of the inclined section, and the vertical section contacts a first contact point on the power source.

5. The structure for connecting a PCB board to a power source according to claim 1, characterized in that: The reed is made of brass.

6. The structure for connecting a PCB board to a power source according to claim 5, characterized in that: The contact portion is provided with at least one second contact point along its width direction, and the second contact point is in contact with the first contact point; and the surface of the second contact point is gold-plated.

7. The structure for connecting a PCB board to a power source according to claim 1, characterized in that: The two pads are provided with first via holes penetrating through the walls thereof, and the PCB board is also provided with second via holes penetrating through the walls thereof and communicating with the first via holes.

8. The structure for connecting a PCB board to a power source according to claim 1, characterized in that: The connection positions of the welding piece and the elastic body are connected by a fillet transition.

9. The structure for connecting a PCB board to a power source according to claim 1, characterized in that: The connecting piece is welded to the inner wall of the notch.

10. The structure for connecting a PCB board to a power source according to claim 1, characterized in that: The welding piece is provided with a plurality of through holes penetrating through its wall, and the plurality of through holes are arranged in an array on the welding piece.

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