CN-121993483-A - Support structure, manufacturing method thereof and electronic equipment

Abstract

The application provides a supporting structural member, a manufacturing method thereof and electronic equipment. The supporting structural member comprises a bending part and a supporting part, wherein the supporting part is arranged on two sides of the bending part along a first direction and is connected with the bending part, the first direction is perpendicular to the length direction of the bending part, the bending part and the supporting part are arranged on the same plane in the unfolded state of the supporting structural member, the supporting structural member is bent in the bending state, the supporting parts on two sides of the bending part are mutually close to each other, the bending part and the supporting part are made of different materials, the strength of the bending part is greater than that of the supporting part, and the density of the supporting part is less than that of the bending part. The supporting structural member can meet the requirements of weight reduction, thinning and strength.

Inventors

• CAI MING

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (19)

1. 1. The supporting structure is characterized by comprising a bending part and a supporting part, wherein the supporting part is arranged on two sides of the bending part along a first direction and is fixedly connected with the bending part, the first direction is perpendicular to the length direction of the bending part, the bending part and the supporting part are arranged on the same plane in an unfolding state of the supporting structure, the bending part is bent in the bending state of the supporting structure, and the supporting parts on two sides of the bending part are mutually close; the material of kink with the material of supporting part is different, the intensity of kink is greater than the intensity of supporting part, the density of supporting part is less than the density of kink.
2. 2. The support structure of claim 1, wherein the bend and the support are fixedly connected by co-firing.
3. 3. The support structure of claim 2, wherein the bend and the support have a lap joint region along the first direction, the lap joint region having a mixed crystal phase therein, the mixed crystal phase including a crystal phase precipitated from the bend and a crystal phase precipitated from the support.
4. 4. A support structure according to any one of claims 1 to 3, wherein the thickness of the support structure is not more than 0.2mm, the modulus of elasticity of the bent portion is not less than 180GPa, the yield strength is not less than 800MPa, and the density of the support portion is not more than 3.0g/cm 3 .
5. 5. The support structure of any one of claims 1-4, wherein the bend is a stainless steel plate.
6. 6. The support structure of any one of claims 1-4, wherein the bending portion comprises a plurality of block-shaped stainless steel plates and a bridging plate, the plurality of block-shaped stainless steel plates are sequentially arranged at intervals along the length direction of the bending portion, the bridging plate is arranged between two adjacent block-shaped stainless steel plates, and the density of the bridging plate is less than or equal to 3.0g/cm 3 .
7. 7. The support structure of any one of claims 1-6, wherein the support is one of an aluminum sheet, an aluminum alloy sheet, or an aluminum-based composite sheet.
8. 8. The support structure of any one of claims 1-6, wherein the support portion comprises an aluminum-based composite panel and an aluminum alloy panel disposed between the aluminum-based composite panel and the bend portion and connected to the aluminum-based composite panel and the bend portion, respectively.
9. 9. The support structure of any one of claims 1-8, wherein the support portion has a thermal conductivity of greater than or equal to 120 w/m-k.
10. 10. The support structure of any one of claims 1-9, further comprising an auxiliary reinforcing plate, wherein the bend and the support are provided in the auxiliary reinforcing plate, respectively.
11. 11. The support structure of any one of claims 1-10 wherein the overlap region of the bend and the support in the first direction has a width of less than 300 microns.
12. 12. The support structure of claim 11 wherein said overlap region has a width of 30-300 microns.
13. 13. A support structure according to any one of claims 1 to 12, wherein the overlap region between the support portion and the bend portion is provided with a male-female connection structure.
14. 14. The support structure of any one of claims 1-13, wherein the bending portions comprise at least two, each of the bending portions being provided with the support portion on both sides in the first direction.
15. 15. A method of making a support structure as claimed in any one of claims 1 to 14, comprising: respectively placing the raw materials of the bending part and the raw materials of the supporting part into a forming die, and performing compression forming by using an isostatic pressing process to obtain an intermediate section; And carrying out heat treatment on the intermediate section bar to obtain the support structural member.
16. 16. The method of claim 15, wherein the heat treatment comprises a solution treatment and an aging treatment.
17. 17. The method according to claim 16, wherein the solid solution temperature in the solid solution treatment is 460 to 480 ℃ and the solid solution time is 1 to 2 hours, and the aging temperature in the aging treatment is 110 to 130 ℃ and the aging time is 6 to 40 hours.
18. 18. The method according to any one of claims 15 to 17, wherein the material of the bending portion is a block, and the material of the supporting portion is powder; the method for manufacturing the middle section comprises the steps of respectively placing the raw materials of the bending part and the raw materials of the supporting part into a forming die, and performing press forming by using an isostatic pressing process to obtain the middle section, wherein the method comprises the following steps: And placing the block raw material of the bending part in the middle of the forming die, placing the powder raw material of the supporting part on two sides of the block raw material, and carrying out isostatic pressing through degassing and pressurizing to obtain the intermediate section.
19. 19. A foldable electronic device comprising a support structure according to any one of claims 1-14.

Description

Support structure, manufacturing method thereof and electronic equipment Technical Field The application relates to a supporting structural member, a manufacturing method thereof and electronic equipment. Background Electronic devices incorporating folding screens typically have one or more layers of metal under the folding screen as an under-screen support structure in order to maintain the flatness and rigidity of the folding screen. The existing under-screen supporting structural member is mainly made of metal, namely stainless steel or titanium alloy. The above metal materials have high strength, but have the problems of high density and heavy weight. In order to reduce the weight of the support structure, a fibrous composite material or a lightweight alloy material may be used. The fiber composite material such as carbon fiber, glass fiber, aramid fiber, ceramic fiber and other composite materials has low density and obvious weight reduction benefit, but has certain disadvantages compared with metal due to modulus, namely rigidity, of the fiber material after being compounded with resin, and cannot meet the supporting requirement of the folding screen. To increase the stiffness of the fibrous composite material, the thickness of the support structure needs to be increased to compensate. Which in turn contradicts the thinning requirements of current products. Although the light alloy can meet the requirement of thinning, the existing light alloy cannot meet the requirement of 20 ten thousand times of turning test, namely 20 ten thousand times of bending under the condition that the bending radius is 1.2mm, and the light alloy does not crack. Therefore, the existing supporting structural member cannot meet the requirement of 20 ten thousand turning tests while reducing weight and thinning. Disclosure of Invention The application provides a supporting structural member, a manufacturing method thereof and electronic equipment. In a first aspect, the application provides a supporting structure, which comprises a bending part and a supporting part, wherein the supporting part is arranged on two sides of the bending part along a first direction and is fixedly connected with the bending part, the first direction is perpendicular to the length direction of the bending part, the bending part and the supporting part are arranged in a coplanar manner when the supporting structure is in an unfolding state, the supporting structure is bent at the bending part, the supporting parts on two sides of the bending part are mutually close, the bending part and the supporting part are made of different materials, the strength of the bending part is greater than that of the supporting part, and the density of the supporting part is less than that of the bending part. The supporting structural member provided by the application is divided into the bending part and the supporting part, and when the supporting structural member is in an unfolding state, the bending part and the supporting part are arranged in a coplanar manner. When the supporting structural member is in a bending state, the bending part bends and drives the supporting parts at two sides to move towards the directions close to each other. The bending part and the supporting part are made of different materials, the bending part is made of high-strength materials, and the supporting part is made of low-density materials. The strength of the bending part is greater than that of the supporting part, for example, the yield strength of the bending part is greater than that of the supporting part, so that the bending part has high enough bending performance to meet the requirement of 20 ten thousand times of bending test. In addition, the density of the supporting part is lower than that of the bending part, and the weight of the whole supporting structural member can be greatly reduced under the condition that the area of the supporting part is far greater than that of the bending part. Due to reasonable collocation of the high-strength bending part and the low-density supporting part, the turning test requirement can be met while the weight and the thickness are reduced. In an alternative implementation, the bending portion and the supporting portion are fixedly connected by co-firing. The co-firing is co-sintering, and the connection of the bending part and the supporting part is realized in a co-firing mode, so that the integrated connection of the bending part and the supporting part can be realized, the fusion of molecular-level structures is realized by two materials with different materials, and the connection strength is more reliable. In an alternative implementation, the bending portion and the supporting portion have a lap joint area along the first direction, and a mixed crystal phase exists in the lap joint area, wherein the mixed crystal phase includes a crystal phase precipitated from the bending portion and a crystal phase precipitated from the suppo