Circuit board elastic sheet structure
By optimizing the design of the circuit board shrapnel structure, including multiple elastic arms and contact protrusions, the problem of insufficient elastic deformation of the shrapnel when under stress in the prior art is solved, and the contact reliability and space utilization efficiency with SMD components are improved.
Patent Information
- Application Number
- CN202323504155.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2033-12-20
AI Technical Summary
The shape design of the existing circuit board shrapnel structure makes it unable to fully exert its elastic deformation ability when under stress, affecting the contact reliability between the shrapnel and SMD components.
Design a circuit board shrapnel structure including welding parts, side plates and elastic structures, wherein the elastic structure consists of a plurality of elastic arms, and the elastic performance is increased by optimizing the arm length and angle design, and a contact convex is provided on the fourth elastic arm To increase the contact area, the side plate serves as a protective shell to prevent external force from damage.
Maximize the use of space, improve the elastic properties and contact reliability of the shrapnel structure, reduce plastic deformation, enhance the adsorption capacity of SMD components, and protect the elastic structure from external forces.
Smart Images
Figure CN222365748U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spring pieces, in particular to a circuit board spring piece structure. Background Art
[0002] The shrapnel structure is a mechanical elastic connection method commonly used in electronic products. It is used as a connector between a printed circuit board (PCB) and some other electronic devices with special functions (such as SMD components) to achieve the connection and transmission of electrical signals on the circuit board.
[0003] At present, there are defects in the shape design of the spring structure of the circuit board. The existing springs often adopt O-type and C-type designs. The O-type spring structure and the C-type spring structure not only occupy a large space laterally, but also the spring cannot fully exert its elastic deformation ability when subjected to force, thereby affecting the elastic effect, and further resulting in reduced contact reliability between the spring structure and the SMD components to be mounted. Utility Model Content
[0004] The main purpose of the utility model is to provide a circuit board spring sheet structure, aiming to increase the elastic performance of the spring sheet, so as to solve the technical problem of low contact reliability between the spring sheet and the SMD component.
[0005] To achieve the above-mentioned purpose, the utility model proposes a circuit board spring structure, including a welding part, a side plate and an elastic structure; the welding part is arranged on the circuit board, the side plates are arranged on both sides of the welding part, the elastic structure is connected to one end of the welding part, and the elastic structure and the side plate are located on the same side of the welding part; the elastic structure includes a first elastic arm, a second elastic arm, a third elastic arm and a fourth elastic arm connected in sequence, the first elastic arm is connected to one end of the welding part, the second elastic arm is connected to an end of the first elastic arm away from the welding part, the third elastic arm is connected to an end of the second elastic arm away from the first elastic arm, and the third elastic arm is extended toward a side away from the welding part, the fourth elastic arm is connected to an end of the third elastic arm away from the second elastic arm, and a contact surface is provided on the side of the fourth elastic arm away from the welding part, and the contact surface is used to absorb SMD components.
[0006] Optionally, the welding portion is arranged parallel to the second elastic arm.
[0007] Optionally, an angle between the first elastic arm and the second elastic arm is 80 degrees to 100 degrees.
[0008] Optionally, the second elastic arm is arranged in parallel with the fourth elastic arm.
[0009] Optionally, an angle between the second elastic arm and the third elastic arm is 40 degrees to 60 degrees.
[0010] Optionally, a contact protrusion is convexly provided on the contact surface.
[0011] Optionally, the contact protrusion is frustoconical.
[0012] Optionally, the second end of the fourth elastic arm is provided with an anti-scratch bend.
[0013] Optionally, a first rounded corner is provided between the welding portion and the elastic structure, and a second rounded corner is provided between two connected elastic arms.
[0014] The utility model also provides a method including any one of the above items.
[0015] The beneficial effects of the utility model are:
[0016] 1. The "J"-shaped spring structure is adopted. This design can maximize the use of space and maximize the length of each elastic arm of the spring, thereby increasing the elastic performance of the spring structure, improving the contact reliability between the spring structure and the SMD component, and reducing the plastic deformation of the spring when it is compressed by external devices;
[0017] Second, the fourth elastic arm plays the role of buffering and absorbing the SMD component at the same time. A contact protrusion is designed on the elastic arm to increase the contact area between the elastic arm and the SMD component, thereby maximizing the contact reliability between the spring structure and the SMD component.
[0018] 3. A pair of side panels with an angle of 90 degrees (not limited to 90 degrees) are bent from both sides of the welding part as a protective shell. The side panels are arranged in parallel with the elastic structure to protect the elastic structure from being damaged and deformed by external forces and affecting its functional use. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 This is a schematic diagram of the overall structure of a circuit board spring structure according to an embodiment of the utility model from one angle;
[0021] Figure 2 This is a schematic diagram of the overall structure of the circuit board spring structure of one embodiment of the utility model from another angle;
[0022] Figure 3This is a schematic cross-sectional structure diagram of a circuit board spring structure according to an embodiment of the utility model;
[0023] Figure 4 The figure is a schematic diagram of the assembly state of the circuit board spring piece structure and the circuit board according to one embodiment of the utility model.
[0024] Description of Figure Numbers:
[0025] Welding part 1; side plate 2;
[0026] Elastic structure 3; first elastic arm 3a; second elastic arm 3b; third elastic arm 3c; fourth elastic arm 3d;
[0027] First chamfer 4; second chamfer 5a-5c; contact surface 6; contact protrusion 7; anti-scratch bend 8; circuit board 9.
[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0032] See also Figure 1 to Figure 4 The utility model proposes a circuit board spring structure, including a welding part 1, a side plate 2 and an elastic structure 3; the welding part 1 is arranged on the circuit board, the elastic structure 3 is connected to the welding part 1 and extends upward from the welding part 1, the side plate 2 is connected to the welding part 1 and is located on both sides of the elastic structure 3; the elastic structure 3 includes a first elastic arm 3a, a second elastic arm 3b, a third elastic arm 3c and a fourth elastic arm 3d which are connected in sequence; the first end of the first elastic arm 3a is connected to the welding part 1, the second end of the first elastic arm 3a is connected to the first end of the second elastic arm 3b, the welding part 1 and the second elastic arm 3b are located on the same side of the first elastic arm 3a; the second end of the second elastic arm 3b is connected to the first end of the third elastic arm 3c; the second end of the third elastic arm 3c is connected to the first end of the fourth elastic arm 3d; the second end of the third elastic arm 3c is arranged higher than its first end; the fourth elastic arm 3d is provided with a contact surface 6 for absorbing SMD components.
[0033] Specifically, the welding part 1 is a structure in which the circuit board spring structure is connected to the circuit board 9. The circuit board spring structure is fixed to the circuit by a welding process so that the spring structure as a whole can withstand a large mechanical load and high-frequency signal transmission, wherein the contact surface 6 between the welding part 1 and the circuit board 9 is completely fitted together without any gap or void.
[0034] Furthermore, the side panel 2 extends outward from the welding portion 1 along the side away from the circuit board 9. Two side panels 2 are provided, and the two side panels 2 are arranged opposite to each other. In this embodiment, the angle between the side panel 2 and the welding portion 1 is 90 degrees, and the side panel 2 and the welding portion 1 are an integrally formed structure. The side panel 2 is bent 90 degrees on both sides of the welding portion 1 to form a protective shell. The elastic structure 3 is provided between the two side panels 2. The side panel 2 and the elastic structure 3 are arranged in parallel, which can protect the elastic structure 3 from being damaged and deformed by external forces and affecting the functional use.
[0035] Furthermore, the second end of the first elastic arm 3a is an end away from the welding portion 1, the second end of the second elastic arm 3b is an end away from the first elastic arm 3a, and the second end of the third elastic arm 3c is an end away from the second elastic arm 3b. The first elastic arm 3a is extended upward from one end of the welding portion 1, and the angle between the first elastic arm 3a and the side plate 2 is 90 degrees, so that the side plate 2 provides maximum protection for the first elastic arm 3a. The second elastic arm 3b is horizontally extended from one end of the first elastic arm 3a to serve as a support plate. The third elastic arm 3c connects the second elastic arm 3b with the fourth elastic arm 3d, saving space while providing an elastic buffering effect again. The fourth elastic arm 3d is extended from one end of the third elastic arm 3c, and the third elastic arm 3c partially extends out of the side plate 2, and the fourth elastic arm 3d completely exposes the side plate 2, wherein the welding portion 1 and the first elastic arm 3a, the second elastic arm 3b, the third elastic arm 3c and the fourth elastic arm 3d connected in sequence are an integrally formed structure.
[0036] In this embodiment, the fourth elastic arm 3d serves as the starting point of the force on the entire elastic structure 3. It absorbs external pressure through its elastic characteristics and transfers it to the subsequent elastic arms. At the same time, the fourth elastic arm 3d also uses a contact surface 6 for adsorbing SMD components. When the fourth elastic arm 3d contacts the SMD component, it will undergo elastic deformation and use the contact surface 6 to adsorb the SMD component. The third elastic arm 3c plays the role of bearing and transmitting force. It can adapt to and buffer the pressure transmitted from the fourth elastic arm 3d through its elastic deformation, and transmit the pressure backward. The second elastic arm 3b plays the role of extension and support. It can provide additional elastic deformation and flexible connection, making the entire shrapnel structure more flexible. The first elastic arm 3a is connected to one end of the welding part 1, and it transmits the pressure buffered by the above three elastic arms to the circuit board 9, thereby preventing the elastic pressure of the shrapnel structure from being too large to damage the circuit board 9, effectively ensuring the quality of the product.
[0037] SMD components are the abbreviation of Surface Mounted Devices, which means surface mount devices. They are installed on the surface of the circuit board 9 through surface assembly technology and are soldered and assembled by methods such as reflow soldering or dip soldering. In this embodiment, the contact surface 6 is used to facilitate the positioning and attachment of the SMD components during the installation process.
[0038] See also Figure 1 to Figure 4In this embodiment, the welding part is arranged in parallel with the second elastic arm 3b. The parallel arrangement can make the circuit board spring structure more compact and stable, reduce its vibration and displacement during use, and also make the stress distribution between the welding part, the first elastic arm 3a, and the second elastic arm 3b more uniform, thereby improving the bearing capacity and service life of the overall structure.
[0039] See also Figure 1 to Figure 4 In this embodiment, the angle between the first elastic arm 3a and the second elastic arm 3b is 80 degrees to 100 degrees. In a specific implementation, the angle between the first elastic arm 3a and the second elastic arm 3b is 90 degrees. In addition, the angle between the first elastic arm 3a and the welding portion 1 and the angle between the first elastic arm 3a and the second elastic arm 3b are co-lateral internal angles.
[0040] See also Figure 1 to Figure 4 In this embodiment, the second elastic arm 3b is arranged in parallel with the fourth elastic arm 3d. The second elastic arm 3b and the fourth elastic arm 3d are arranged in parallel to provide better symmetry and balance in the structure, and also enable the entire elastic structure 3 to better disperse the load when subjected to external stress or vibration, thereby improving the stability and durability of the structure. In addition, the second elastic arm 3b and the fourth elastic arm 3d arranged in parallel can also provide a larger elastic deformation range and elastic recovery ability. When an external force acts on the fourth elastic arm 3d, the two can cooperate with each other to achieve a larger displacement and deformation while maintaining the elastic recovery characteristics of the structure.
[0041] See also Figure 1 to Figure 4 In this embodiment, the angle between the second elastic arm 3b and the third elastic arm 3c is 40 degrees to 60 degrees. In a specific implementation, the angle between the second elastic arm 3b and the third elastic arm 3c is 50 degrees.
[0042] See also Figure 1 to Figure 4 In this embodiment, the angle between the third elastic arm 3c and the fourth elastic arm 3d is 120 degrees to 140 degrees. In a specific implementation, the angle between the third elastic arm 3c and the fourth elastic arm 3d is 130 degrees.
[0043] Among them, the angle between the first elastic arm 3a and the second elastic arm 3b, the angle between the second elastic arm 3b and the third elastic arm 3c, and the angle between the third elastic arm 3c and the fourth elastic arm 3d are 120 degrees to 140 degrees, which refers to the angle between the two structures in the cross-sectional view.
[0044] See also Figure 1 to Figure 4 In this embodiment, a contact protrusion 7 is provided on the contact surface 6 .
[0045] In this embodiment, the contact protrusion 7 is a truncated cone type. The truncated cone type contact protrusion 7 has a larger bottom diameter and a smaller top diameter. This design can increase the contact area between the contact surface 6 of the fourth elastic arm 3d and the SMD component, and make the contact points more evenly distributed, thereby improving the stability and load-bearing capacity of the contact with the SMD component.
[0046] See also Figure 1 to Figure 4 In this embodiment, the second end of the fourth elastic arm 3d is provided with an anti-scratch bend 8, and the second end of the fourth elastic arm 3d is the end away from the third elastic arm 3c. The anti-scratch bend 8 structure is usually achieved by changing the shape of the elastic arm or adding specific protrusions or grooves. In a specific implementation, the anti-scratch bend 8 structure adopts a rounded corner (arc), which can provide additional support and protection to reduce the possibility of scratches, thereby reducing the risk of damage to the elastic arm when it is subjected to external forces or collisions. The design of the anti-scratch bend 8 structure is intended to improve the durability and reliability of the elastic arm.
[0047] See also Figure 1 to Figure 4 In this embodiment, a first rounded corner 4 is provided between the welding portion 1 and the elastic structure 3, and a second rounded corner is provided between the two connected elastic arms. The first rounded corner 4 can reduce stress concentration and improve the fatigue resistance of the first elastic arm 3a, while the second rounded corner is located between two adjacent elastic arms, which are respectively a rounded corner 5a provided between the first elastic arm 3a and the second elastic arm 3b, a rounded corner 5b provided between the second elastic arm 3b and the third elastic arm 3c, and a rounded corner 5c provided between the third elastic arm 3c and the fourth elastic arm 3d. The function of the second rounded corner is to avoid cracks and fractures caused by stress concentration and to improve the bearing capacity and service life of each elastic arm. The design of the first rounded corner 4 and the second rounded corner effectively improves the reliability and stability of the circuit board spring structure.
[0048] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A circuit board spring structure, characterized in that: including a welding part, a side plate and an elastic structure; The welding part is arranged on the circuit board, the elastic structure is connected to the welding part and extends upwards from the welding part, and the side plates are connected to the welding part and are located at both sides of the elastic structure; The elastic structure includes a first elastic arm, a second elastic arm, a third elastic arm and a fourth elastic arm which are connected in sequence; the first end of the first elastic arm is connected to the welding portion, the second end of the first elastic arm is connected to the first end of the second elastic arm, and the welding portion and the second elastic arm are located on the same side of the first elastic arm; the second end of the second elastic arm is connected to the first end of the third elastic arm; the second end of the third elastic arm is connected to the first end of the fourth elastic arm; the second end of the third elastic arm is arranged higher than its first end; and the fourth elastic arm is provided with a contact surface for absorbing SMD components.
2. The circuit board spring structure according to claim 1, characterized in that: The welding portion is arranged parallel to the second elastic arm.
3. The circuit board spring structure according to claim 2, characterized in that: The angle between the first elastic arm and the second elastic arm is 80 degrees to 100 degrees.
4. The circuit board spring structure according to claim 1, characterized in that: The second elastic arm is arranged in parallel with the fourth elastic arm.
5. The circuit board spring structure according to claim 4, characterized in that: The angle between the second elastic arm and the third elastic arm is 40 degrees to 60 degrees.
6. The circuit board spring structure according to claim 1, characterized in that: A contact protrusion is convexly arranged on the contact surface.
7. The circuit board spring structure according to claim 6, characterized in that: The contact protrusion is in a truncated cone shape.
8. The circuit board spring structure according to claim 1, characterized in that: The second end of the fourth elastic arm is provided with an anti-scratch bend.
9. The circuit board spring structure according to claim 1, characterized in that: A first rounded corner is arranged between the welding portion and the elastic structure, and a second rounded corner is arranged between the two connected elastic arms.