Elastic sheet, circuit board assembly and electronic device

Abstract

The embodiment of the utility model relates to the technical field of electronic equipment, and particularly discloses an elastic sheet, a circuit board assembly and an electronic device, the elastic sheet comprises a fixed seat and an elastic sheet piece, the elastic sheet piece comprises a first elastic arm, a second elastic arm, a contact part and a supporting part, one end of the first elastic arm is connected with the fixed seat, the first elastic arm extends along a first direction, and the second elastic arm extends along a second direction. One end of the second elastic arm is connected with the other end of the first elastic arm, one end of the second elastic arm is bent and extends along a second direction, one end of the contact part is connected with the other end of the second elastic arm, the contact part is bent, so that the other end of the contact part faces the first elastic arm, and one end of the supporting part is connected with the other end of the contact part; the other end of the supporting part extends towards the first elastic arm, and the first direction is opposite to the second direction; the other end of the supporting part is used for abutting against the first elastic arm to support the contact part when the contact part is pressed by the electronic component. The bending structure enables stress to be dispersed when the elastic sheet is stressed, and stability and durability of the elastic sheet are improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of electronic equipment, and in particular to a spring, a circuit board assembly and an electronic device. Background Art

[0002] In the SMT (Surface Mounted Technology) patch process, the soldering spring is a key component, and its performance directly affects the connection quality and stability between electronic components and PCB (Printed Circuit Board). With the miniaturization and complexity of electronic equipment, the requirements for the soldering spring structure are getting higher and higher. The current SMT spring is mainly designed as a single-piece extension.

[0003] In the process of implementing the embodiments of the present application, the inventors found that: Figure 1 As shown, the single-piece spring sheet 1 generally comprises a fixing seat 11 and a spring arm 12 which is bent and extended from the fixing seat 11. The fixing seat 11 is welded to the PCB (2). The other end of the spring arm 12 which is away from the fixing seat 11 is used for being pressed by electronic components. When the electronic components press the spring arm 12, stress is concentrated at the bending part of the spring arm 12, which may easily cause the bending part of the spring arm 12 to break. Utility Model Content

[0004] In view of the above problems, the embodiments of the present invention provide a spring, a circuit board assembly and an electronic device, which overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a spring piece, including a fixing seat and a spring piece. The spring piece includes a first elastic arm, a second elastic arm, a contact portion and a supporting portion, one end of the first elastic arm is connected to the fixing seat, the first elastic arm extends along a first direction, one end of the second elastic arm is connected to the other end of the first elastic arm, one end of the second elastic arm is bent and extended along a second direction, one end of the contact portion is connected to the other end of the second elastic arm, the contact portion is bent so that the other end of the contact portion faces the first elastic arm, one end of the supporting portion is connected to the other end of the contact portion, the other end of the supporting portion extends toward the first elastic arm, and the first direction and the second direction are opposite; the other end of the supporting portion is used to abut the first elastic arm to support the contact portion when the contact portion is pressed by an electronic component.

[0006] Optionally, the first elastic arm includes a first force arm and a second force arm, one end of the first force arm is obliquely connected to the fixed seat, the other end of the first force arm is connected to one end of the second force arm, and the other end of the second force arm is connected to one end of the second elastic arm.

[0007] Optionally, the second elastic arm includes a third force arm and a fourth force arm, one end of the third force arm is bent and connected to the other end of the second force arm, the other end of the third force arm is obliquely connected to one end of the fourth force arm, and the other end of the fourth force arm is connected to one end of the contact portion.

[0008] Optionally, the support portion is bent at the other end away from the contact portion, and the bent portion of the support portion is used to abut against the first elastic arm when the contact portion is pressed by an electronic component.

[0009] Optionally, the fixing seat includes an arc-shaped plate, a first plate body and a second plate body, the two ends of the arc-shaped plate are respectively connected to one end of the first plate body and one end of the second plate body, the first plate body and the second plate body are arranged in parallel, and the other end of the second plate body is connected to one end of the first elastic arm.

[0010] Optionally, the first plate body is provided with a through hole, and the through hole is used to fill solder when the first plate body is soldered to a circuit board.

[0011] Optionally, the number of the through holes is at least two, and at least two of the through holes are evenly distributed on the first plate body.

[0012] Optionally, the spring piece further includes a connecting piece, the number of the spring piece pieces is two, and two ends of the connecting piece are respectively connected to one spring piece piece.

[0013] In order to solve the above technical problems, another technical solution adopted by the utility model is: to provide a circuit board assembly, including a circuit board, electronic components and the spring sheet as described above, the fixing seat is fixed to the circuit board, the electronic components press against the contact part of the spring sheet, and the electronic components are connected to the circuit board through the spring sheet.

[0014] In order to solve the above technical problem, another technical solution adopted by the present invention is: to provide an electronic device, characterized in that it includes the circuit board assembly as described above.

[0015] The beneficial effects of the embodiments of the utility model are as follows: Different from the prior art, the embodiments of the present application provide a spring sheet, an electric board assembly and an electronic device, wherein the spring sheet includes a fixing seat and a spring sheet component, wherein the spring sheet component includes a first elastic arm, a second elastic arm, a contact portion and a support portion, wherein one end of the first elastic arm is connected to the fixing seat, the first elastic arm extends along a first direction, one end of the second elastic arm is connected to the other end of the first elastic arm, one end of the second elastic arm is bent and extended along a second direction, one end of the contact portion is connected to the other end of the second elastic arm, the contact portion is bent so that the other end of the contact portion faces the first elastic arm, one end of the support portion is connected to the other end of the contact portion, the other end of the support portion extends toward the first elastic arm, and the first direction and the second direction are opposite; the other end of the support portion is used to abut the first elastic arm to support the contact portion when the contact portion is pressed by an electronic component. In the above manner, the bending structure disperses the stress of the spring sheet when it is subjected to force, thereby improving the stability and durability of the spring sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0017] Figure 1 It is a structural diagram of a shrapnel and a circuit board of the prior art;

[0018] Figure 2 It is a structural diagram of a spring piece according to an embodiment of the utility model;

[0019] Figure 3 It is a side view of the spring piece of the embodiment of the utility model;

[0020] Figure 4 It is a bottom view of the spring piece of the embodiment of the utility model;

[0021] Figure 5 It is a rear view of the spring piece of the embodiment of the utility model;

[0022] Figure 6 It is a side view of the disassembled components of the circuit board assembly according to the embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0025] See also Figure 2 The spring piece 3 includes a fixing seat 31, a spring piece 32 and a connecting piece 33. The two ends of the connecting piece 33 are respectively connected to a spring piece 32. The fixing seat 31 is used to fix the spring piece 3 to the circuit board. One end of the spring piece 32 is connected to the fixing seat 31, and the other end of the spring piece 32 is used to contact and connect with the electronic components. The spring piece 3 is used to realize the connection between the electronic components and the circuit board.

[0026] For the above-mentioned fixing base 31, see Figure 3 and Figure 4 The fixing seat 31 includes an arc plate 311, a first plate body 312 and a second plate body 313. The two ends of the arc plate 311 are respectively connected to one end of the first plate body 312 and one end of the second plate body 313. The first plate body 312 and the second plate body 313 are arranged in parallel, and the other end of the second plate body 313 is connected to one end of the elastic piece 32. The arc plate 311 plays a buffering role in the force transmission between the first plate body 312 and the second plate body 313, thereby improving the stability of the fixing seat 31. The first plate body 312 is provided with a through hole 3120, and the through hole 3120 is used to fill solder when the first plate body 312 is welded to the circuit board. Compared with direct welding, the setting of the through hole 3120 forms a more stable welding point, thereby improving the connection strength between the first plate body 312 and the circuit board.

[0027] In some embodiments, the surface of the second board 313 facing away from the first board 312 serves as a suction surface. In the SMT process, the suction surface matches the suction head of the automatic placement machine, so that the spring piece 3 can be accurately positioned, sucked and placed in the correct position.

[0028] In some embodiments, the number of the through holes 3120 is at least two, and the at least two through holes 3120 are evenly distributed on the first plate body 312 .

[0029] It is understandable that the fixing seat 31 is not limited to the above structure, and may also be other structures. For example, the fixing seat 31 only includes the first plate body 312 , and the first plate body 312 is obliquely connected to the first elastic arm 321 .

[0030] For the above-mentioned spring piece 32, please refer to Figure 3 The elastic piece 32 includes a first elastic arm 321, a second elastic arm 322, a contact portion 323 and a support portion 324. One end of the first elastic arm 321 is connected to the fixing seat 31, and the first elastic arm 321 extends along the first direction z. One end of the second elastic arm 322 is connected to the other end of the first elastic arm 321, and one end of the second elastic arm 322 extends along the second direction. One end of the contact portion 323 is connected to the other end of the second elastic arm 322. The contact portion 323 is bent so that the other end of the contact portion 323 faces the first elastic arm 321. One end of the support portion 324 is connected to the other end of the contact portion 323, and the other end of the support portion 324 extends toward the first elastic arm 321. The other end of the support portion 324 is used to abut the first elastic arm 321 when the contact portion 323 is pressed by the electronic component to support the contact portion 323. The first direction z is opposite to the second direction.

[0031] Further, the first elastic arm 321 includes a first force arm 3211 and a second force arm 3212, and the second elastic arm 322 includes a third force arm 3221 and a fourth force arm 3222. One end of the first force arm 3211 is obliquely connected to the second plate 313, the other end of the first force arm 3211 is connected to one end of the second force arm 3212, the other end of the second force arm 3212 is bent and connected to one end of the third force arm 3221, the other end of the third force arm 3221 is obliquely connected to one end of the fourth force arm 3222, the other end of the fourth force arm 3222 is connected to one end of the contact portion 323, the other end of the contact portion 323 faces the second force arm 3212, the other end of the contact portion 323 is connected to one end of the support portion 324, and the support portion 324 is bent away from the other end of the contact portion 323 and provided with a bent portion 3241. When the electronic component presses against the contact portion 323, the contact portion 323 is subjected to force to generate stress, and the stress is dispersed to various parts of the spring piece 32, avoiding stress concentration, and effectively improving the structural stability and durability of the spring piece 3. At the same time, the contact portion 323 drives the supporting portion 324 to move toward the second force arm 3212 until the bending portion 3241 contacts the second force arm 3212. The second force arm 3212 provides a positive elastic force to support the bending portion 3241, further improving the stability of the spring piece 3 structure.

[0032] In some embodiments, the connection between the first lever arm 3211 and the second plate 313 , the connection between the first lever arm 3211 and the second lever arm 3212 , and the connection between the third lever arm 3221 and the fourth lever arm 3222 are all arranged in an arc shape to enhance the elastic performance of the spring piece 3 .

[0033] Please note that Figure 5 In the embodiment of the present application, there are two spring pieces 32, and the two ends of the connecting piece 33 are respectively connected to the second force arm 3212 of one spring piece 32. The provision of two spring pieces 32 increases the contact area, and improves the conduction efficiency between the spring piece and the electronic component compared to a single contact portion. The connecting piece 33 enhances the structural stability of the two spring pieces 32 and reduces the risk of deformation. At the same time, the two spring pieces 32 are relatively independent, ensuring that their respective elastic properties are not affected.

[0034] It is understandable that the elastic piece 32 is not limited to the above structure, and may also be other structures. For example, a single elastic piece 32 includes more elastic arms, or the number of the elastic pieces 32 is three or more, and connecting pieces 33 are provided between the elastic pieces 32.

[0035] It should be noted that the spring piece 3 is made of elastic conductive material.

[0036] In the embodiment of the utility model, the spring piece 3 includes a fixing seat 31 and a spring piece 32. The spring piece 32 includes a first elastic arm 321, a second elastic arm 322, a contact portion 323 and a support portion 324 connected in sequence. The connecting ends of the first elastic arm 321 and the second elastic arm 322 and the contact portion 323 are all bent, and the support portion 324 faces the first elastic arm 321. When the contact portion 323 is subjected to force, the continuously bent structure can effectively disperse the stress. The contact portion 323 drives the support portion 324 to contact the first elastic arm 321. The first elastic arm 321 generates a positive elastic force on the support portion 324, thereby improving the structural stability and durability of the spring piece 3.

[0037] The utility model also provides a circuit board assembly 1000 embodiment, please refer to Figure 6 The circuit board assembly 1000 includes a circuit board 2, an electronic component 4 and the above-mentioned spring 3. The structure and function of the spring 3 can be referred to the above-mentioned embodiment, and will not be described here one by one. The first plate body 312 of the fixing seat 31 is used to be fixed to the circuit board 2, and the electronic component 4 is connected to the circuit board 2 by pressing the contact portion 323 of the spring 3.

[0038] The present invention further provides an electronic device embodiment, the electronic device includes the above-mentioned circuit board assembly 1000. The structure and function of the circuit board assembly 1000 can be referred to the above-mentioned embodiment, which will not be described in detail here.

[0039] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. A shrapnel, characterized in that: include: Fixed seat; The elastic piece comprises a first elastic arm, a second elastic arm, a contact portion and a support portion, wherein one end of the first elastic arm is connected to the fixing seat, the first elastic arm extends along a first direction, one end of the second elastic arm is connected to the other end of the first elastic arm, one end of the second elastic arm is bent and extended along a second direction, one end of the contact portion is connected to the other end of the second elastic arm, the contact portion is bent so that the other end of the contact portion faces the first elastic arm, one end of the support portion is connected to the other end of the contact portion, the other end of the support portion extends toward the first elastic arm, and the first direction and the second direction are opposite; The other end of the supporting portion is used to abut against the first elastic arm to support the contact portion when the contact portion is pressed by the electronic component.

2. The shrapnel according to claim 1, characterized in that: The first elastic arm includes a first force arm and a second force arm, one end of the first force arm is obliquely connected to the fixing seat, the other end of the first force arm is connected to one end of the second force arm, and the other end of the second force arm is connected to one end of the second elastic arm.

3. The shrapnel according to claim 2, characterized in that , The second elastic arm includes a third force arm and a fourth force arm, one end of the third force arm is bent and connected to the other end of the second force arm, the other end of the third force arm is obliquely connected to one end of the fourth force arm, and the other end of the fourth force arm is connected to one end of the contact portion.

4. The shrapnel according to claim 3, characterized in that , The support portion is bent at the other end away from the contact portion, and the bent portion of the support portion is used to abut against the first elastic arm when the contact portion is pressed by an electronic component.

5. The shrapnel according to claim 1, characterized in that: The fixing seat includes an arc-shaped plate, a first plate body and a second plate body, the two ends of the arc-shaped plate are respectively connected to one end of the first plate body and one end of the second plate body, the first plate body and the second plate body are arranged in parallel, and the other end of the second plate body is connected to one end of the first elastic arm.

6. The shrapnel according to claim 5, characterized in that: The first plate body is provided with a through hole, and the through hole is used to fill solder when the first plate body is welded to the circuit board.

7. The shrapnel according to claim 6, characterized in that: The number of the through holes is at least two, and at least two of the through holes are evenly distributed on the first plate body.

8. The shrapnel according to any one of claims 1 to 7, characterized in that: The spring piece further includes a connecting piece, the number of the spring piece pieces is two, and two ends of the connecting piece are respectively connected to one of the spring piece pieces.

9. A circuit board assembly, characterized in that: It comprises a circuit board, an electronic component and a spring as described in any one of claims 1 to 8, wherein the fixing seat is fixed to the circuit board, the electronic component presses against the contact portion of the spring, and the electronic component is connected to the circuit board via the spring.

10. An electronic device, characterized in that: Comprising the circuit board assembly as claimed in claim 9.

Images