Electronic device and connection device

1. An electronic device, comprising:

a first body, having a first surface and a third surface parallel to each other, a first display device being placed at the first surface;

a second body, having a second surface and a fourth surface parallel to each other, a second display device being placed at the second surface; and

a connection device, rotatably connecting the first body and the second body, wherein:

the electronic device has a first position when the first surface and the second surface facing a same direction at the first position and a second position when the first surface and the second surface facing each other;

the first body, at a first end close to the connection device, forms a first rounded L shape wall surface having a fifth surface close to the first surface and a seventh surface connecting with the third surface with the fifth surface and the seventh surface being two sides of the first L shape wall, and when measured from a bend of the first L shape wall, a length of the fifth surface is not shorter than a length of the seventh surface;

the second body, at a second end of the connection device, forms a second rounded L shape wall surface having a sixth surface is close to the second surface and an eighth surface connecting the fourth surface with the sixth surface and the eighth surface being two sides of the second L shape wall, when measured from a bend of the second L shape wall, a length of the sixth surface is not shorter than a length of the eighth surface;

at the first position, the first rounded L shaped wall surface and the second rounded L shaped wall surface are close to each other to form a first U shaped accommodation groove to accommodate the connection device, such that the connection device is covered by the display surface formed by the first surface and the second surface and the connection device is not exposed from a top of the first surface and the second surface; and

at the second position, the first rounded L shaped wall surface and the second rounded L shaped wall surface form a second U shaped accommodation groove and the connection device is completely accommodated into the second U shaped accommodation groove.

2. The electronic device of claim 1 , wherein during a process of transitioning from the second position to the first position, a distance between the connection device and the first body or the second body decreases.

3. The electronic device of claim 2 , wherein:

the connection device has a shaft; and

during a process of transitioning from the second position to the first position, the first body or the second body move in a radial direction of the shaft, and the connection device moves in a direction away from the display surface.

4. The electronic device of claim 3 , wherein:

the shaft is configured to implement a rotatable connection of the first body and the second body;

the connection device includes an axial movement mechanism, placed at the shaft and moving along an axis of the shaft driven by the shaft; and

the connection device includes a radial movement mechanism, connecting the axial movement mechanism to the first body and moving along a radius of the shaft driven by the axial movement mechanism.

5. The electronic device of claim 4 , wherein:

a mounting piece fixed to the shaft is configured to mount the radial movement mechanism, and a first sliding structure is placed at the mounting piece;

a second sliding structure is configured at a radial movement piece and is obliquely configured relative to the display surface at a plane perpendicular to the display surface; and

the first sliding structure and the second sliding structure are slidably coupled, the first body or the second body move in a radial direction of the shaft, and the connection device moves away from the display surface.

6. The electronic device of claim 1 , wherein the electronic device has a third position.

7. The electronic device of claim 6 , wherein:

an angle between the first body and the second body at the third position is different from an angle between the first body and the second body at the first position; and

the first rounded L shape wall surface and the second rounded L shape wall surface both form the accommodation groove to accommodate the connection device.

8. The electronic device of claim 6 , wherein:

the second wall surface of the first partial accommodation structure and the second partial accommodation structure form an accommodating wall of the accommodation groove at the third position; and

the first wall surface of the first rounded L shape wall surface and the first wall surface of the second rounded L shape wall surface form two side walls of the accommodation groove opposite to each other at the third position.

9. The electronic device of claim 6 , wherein when the first surface and the second surface face a same direction, or the first surface and the second surface are opposite to each other, the first rounded L shape wall surface and the second rounded L shape wall surface form the accommodation groove to accommodate the connection device.

10. The electronic device of claim 6 , wherein when the first surface and the second surface face the same direction:

the first wall surface of the first partial accommodation structure and the second partial accommodation structure form the accommodating wall of the accommodation groove, and the second wall surface of the first rounded L shape wall surface and the second wall surface of the second rounded L shape wall surface form two side walls of the accommodation groove opposite to each other, respectively.

11. The electronic device of claim 6 , wherein when the first surface and the second surface are opposite to each other:

the second wall surface of the first rounded L shape wall surface and the second rounded L shape wall surface form an accommodating wall of the accommodation groove; and

the first wall surface of the first rounded L shape wall surface and the first wall surface of the second rounded L shape wall surface form two side walls of the accommodation groove opposite to each other, respectively.