公开(公告)号：EP4394246A1

公开(公告)日：2024-07-03

申请号：EP22914316.9

申请日：2022-12-16

Applicant: BYD Company Limited

Inventor： ZHU, Liang ,  GUO, Qiang ,  WEN, Danhua ,  FANG, Bin ,  ZHANG, Siquan

IPC: F21S45/48

CPC classification number: F21S45/47 ,  F21W2107/1020180101 ,  F21S45/48 ,  F21V29/74 ,  F21V29/76

Abstract: A heat spreader and an illumination device including the heat spreader are disclosed. The heat spreader includes a first substrate and multiple first heat dissipation fins, the multiple first heat dissipation fins are arranged side by side on the first substrate at intervals in a first preset direction, and the heat spreader meets constraints of the following Relational expression 1: N∈{L/[ δ+9], L/[ δ+9]+2} and H∈δ1+δ2/2−1.2/tan2θ,δ1+δ2/2+1.2/tan2θ.L represents a length of the first substrate in the first preset direction, δ represents a weighted average thickness of the multiple first heat dissipation fins, N represents a distribution number of the first heat dissipation fins, δ1 represents a maximum thickness of the first heat dissipation fin, δ2 represents a minimum thickness of the first heat dissipation fin, θ represents a draft angle of the first heat dissipation fin, and H represents a distribution height of the first heat dissipation fin.

公开(公告)号：EP3734089A1

公开(公告)日：2020-11-04

申请号：EP18893647.0

申请日：2018-12-21

Applicant: BYD Company Limited

Inventor： GONG, Qing ,  GUO, Qiang ,  FANG, Bin ,  WANG, Mengde ,  AN, Wei

IPC: F16B39/24

Abstract: An anti-loosening washer (100) for a threaded connector (200) and a fabrication method thereof are provided. The anti-loosening washer (100) includes an upper washer (1) and a lower washer (2). A plurality of first ratchet teeth (3) distributed in a fan shape are disposed at the bottom of the upper washer (1), and a plurality of second ratchet teeth (4) engaged with the first ratchet teeth (3) are disposed on the top of the lower washer (2). The first ratchet tooth (3) has a wide surface (31) attached to the second ratchet tooth (4) and a narrow surface (32) with an area less than an area of the wide surface (31). The wide surface (31) is a spiral surface formed through a spiral motion performed by a generatrix (12) spaced apart from an axis (11a) around the axis (11a) by using a central axis (11) of the upper washer (1) as the axis (11a). A lead angle of a wire (13) at a middle diameter position of the spiral surface is greater than a lead angle of the threaded connector (200).