一种PCB板与定位板组件
By combining multi-layer columnar positioning pins and a temperature control module, stable positioning of the PCB board in high-temperature processes is achieved, solving the problems of mechanical positioning wear and positional offset, and improving positioning accuracy and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN RUIHONG ELECTRONIC TECH CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing PCB board positioning technologies suffer from frequent mechanical wear, positioning reference offset, and lack of effective constraints on position offset, especially in high-temperature processes where positioning accuracy is difficult to guarantee.
The system employs multi-layered columnar positioning pins, combined with an expansion body and a temperature control module. Heating causes the positioning pins to expand and form an interference fit, while cooling restores the clearance fit. Combined with a limiting flange, it provides physical constraints to achieve stable positioning of the PCB board.
It improves the stability and accuracy of positioning, reduces positioning deviation caused by differences in thermal expansion coefficients, reduces wear and positional shift, and adapts to temperature changes under different working conditions.
Smart Images
Figure CN224512247U_ABST
Abstract
Claims
1. A PCB and positioning plate assembly mounted on a conveyor belt (1), characterized in that, include: PCB board (2), which has positioning holes (21) for positioning. Positioning plate (3), which includes: A substrate (31) is mounted on the conveyor belt (1); A positioning pin (32) is disposed on the side of the substrate (31) away from the conveyor belt. The positioning pin (32) can be inserted into the positioning hole (21) for positioning the PCB board (2). The positioning pin (32) is multi-layered columnar, and includes an expansion body (321), a heat conductor (322), and a heating body (323) in sequence from the inside to the outside along its radial direction. A temperature control module (33) is disposed on the substrate (31) and electrically connected to the heating element (323) for controlling the temperature of the positioning pin (32); in, The heating element (323) can raise the temperature of the expansion body (321); When the locating pin (32) is heated and its radial dimension increases, the locating pin (32) and the locating hole (21) can enter an interference fit state; The expansion body (321) can dissipate heat and be cooled; When the locating pin (32) cools down and its radial dimension decreases, the locating pin (32) and the locating hole (21) can enter a clearance fit state.
2. The PCB board and positioning plate assembly according to claim 1, characterized in that: The positioning pin (32) is frustum-shaped, and the radius of its base away from the substrate (31) is smaller than the radius of its base close to the substrate (31). The positioning hole (21) is a frustum cavity, and the radius of its bottom surface away from the substrate (31) is smaller than the radius of its bottom surface close to the substrate (31). When the positioning hole (21) is inserted by the positioning pin (32), the side of the positioning pin (32) can abut against the inner surface of the positioning hole (21).
3. The PCB and retainer plate assembly of claim 1, wherein, There are at least three positioning pins (32), and the multiple positioning pins (32) are not on the same straight line.
4. The PCB and retainer plate assembly of claim 1, wherein, The substrate (31) is provided with limiting flanges (311) around its perimeter, away from the conveyor belt (1).
5. The PCB board and positioning plate assembly according to claim 4, characterized in that, The cross-section of the limiting flange (311) perpendicular to its extension direction is rectangular.
6. The PCB and retainer plate assembly of claim 4, wherein, The limiting flange (311) has a trapezoidal cross section perpendicular to its extension direction, and the side of the limiting flange (311) facing the positioning pin (32) is an inclined surface, the angle between the inclined surface and the upper surface of the substrate (31) is 120°~150°.
7. The PCB and retainer plate assembly of claim 4, wherein, The PCB board (2) is a frustum with an area away from the substrate (31) larger than the area near the substrate (31). The peripheral side of the PCB board (2) that contacts the limiting flange (311) is an inclined surface, and the angle between the inclined surface and the upper surface of the substrate (31) is 120°~150°. The peripheral inclined surface of the PCB board (2) can abut against the limiting flange (311).
8. The PCB and retainer plate assembly of claim 1, wherein, Further includes: A cooling fan (4) is located on the downstream side of the conveyor belt (1) in the material forward direction; the cooling fan (4) can deliver cold air to the positioning pin (32) of the positioning plate (3) on the conveyor belt (1); When the positioning pin (32) is cooled by the cooling fan (4), the positioning pin (32) and the positioning hole (21) can be converted from an interference fit to a clearance fit.