Rotating mechanism and electronic equipment

Abstract

An embodiment of the present application provides a rotation mechanism and an electronic device, the electronic device including a display screen and a rotation mechanism. The display screen includes a neutral layer. The rotation mechanism includes a limiting base, a first swing arm and a second swing arm, and the limiting base is provided with a first arc groove and a second arc groove. The first swing arm includes a first rotating shaft portion, which is slidably mounted in the first arc groove and can rotate relative to the limiting base. The second swing arm includes a second rotating shaft portion, which is slidably mounted in the second arc groove and can rotate relative to the limiting base. The rotation directions of the first rotating shaft portion and the second rotating shaft portion relative to the limiting base are opposite. The first rotating shaft portion includes a first arc portion and a second arc portion distributed along the circumference of the first rotating shaft portion, the first arc portion and the second arc portion are fixedly connected, the axis of the first arc portion and the axis of the second arc portion are both located in the neutral layer and coincide with each other, and the radius of the first arc portion is different from the radius of the second arc portion.

Description

[0001] This application is a divisional application. The application number of the original application is 202111434863.6, and the original application date is November 29, 2021. The entire content of the original application is incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of foldable terminals, and in particular to a rotating mechanism and an electronic device. Background Art

[0003] With technological advancements, the era of large-screen smart devices has arrived. Foldable devices are gaining popularity due to their large screens and portability. Currently, foldable devices often use a rotating mechanism to fold and unfold. However, existing rotating mechanisms often pull on the display during folding, causing wrinkles on the display and compromising the reliability of the foldable device. Summary of the Invention

[0004] The present application provides a rotating mechanism and an electronic device, which can reduce the pulling of the rotating mechanism on the display screen during the folding process of the electronic device, avoid the problem of wrinkles on the display screen due to force, and ensure the reliability of the electronic device.

[0005] In a first aspect, the present application provides a rotation mechanism for use in a foldable terminal, wherein the foldable terminal includes a display screen, and the display screen includes a neutral layer. It should be noted that since the display screen includes multiple structural layers, the materials of each structural layer are different, and the tensile deformation of each structural layer will also be different. During the folding process of the foldable terminal, some structural layers will be stretched and some structural layers will be compressed. The neutral layer may include one or more structural layers. During the folding process of the foldable terminal, the neutral layer is a layer structure in the display screen that is neither stretched nor compressed, or the neutral layer is a layer structure in the display screen with both small tensile deformation and small compressive deformation.

[0006] The rotation mechanism includes a position-limiting base, a first swing arm, and a second swing arm. The position-limiting base is provided with a first arcuate slot and a second arcuate slot. The first swing arm includes a first rotation axis portion, which is slidably mounted in the first arcuate slot and is rotatable relative to the position-limiting base. The second swing arm includes a second rotation axis portion, which is slidably mounted in the second arcuate slot and is rotatable relative to the position-limiting base. The first and second rotation axes rotate in opposite directions relative to the position-limiting base.

[0007] For example, the first rotating shaft rotates clockwise relative to the position-limiting base, while the second rotating shaft rotates counterclockwise relative to the position-limiting base. At this point, the first swing arm and the second swing arm rotate relative to the position-limiting base to fold relative to each other. Alternatively, the first rotating shaft rotates counterclockwise relative to the position-limiting base, while the second rotating shaft rotates clockwise relative to the position-limiting base, and the first swing arm and the second swing arm rotate relative to the position-limiting base to unfold relative to each other.

[0008] Among them, the first rotating shaft portion includes a first arc portion and a second arc portion distributed along the circumference of the first rotating shaft portion, the first arc portion and the second arc portion are fixedly connected, the axis center of the first arc portion and the axis center of the second arc portion are both located in the neutral layer and coincide with each other, and the radius of the first arc portion is different from the radius of the second arc portion.

[0009] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the first arc-shaped portion and the axis of the second arc-shaped portion are both located in the neutral layer of the display screen, the rotation center of the first swing arm is located in the neutral layer of the display screen when the first swing arm rotates relative to the limiting base, so that the rotation of the first swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the first swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0010] In one embodiment, the difference between the radius of the first arc portion and the radius of the second arc portion is between 0.1 mm and 10 cm, so as to reduce the amplitude of the curvature change between the first arc portion and the second arc portion when the first swing arm rotates relative to the limit base, thereby ensuring the smoothness of the rotation of the first rotating shaft portion relative to the limit base.

[0011] In one embodiment, the second rotating shaft portion includes a third arc portion and a fourth arc portion distributed along the circumference of the second rotating shaft portion, the third arc portion is fixedly connected to the fourth arc portion, the axis center of the third arc portion and the axis center of the fourth arc portion are both located in the neutral layer and coincide with each other, and the radius of the third arc portion is different from the radius of the fourth arc portion.

[0012] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis centers of the third arc-shaped portion and the fourth arc-shaped portion are both located in the neutral layer of the display screen, the rotation center of the second swing arm is located in the neutral layer of the display screen when the second swing arm rotates relative to the limiting base, so that the rotation of the second swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the second swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0013] In one embodiment, the difference between the radius of the third arc portion and the radius of the fourth arc portion is between 0.1 mm and 10 cm, so as to reduce the amplitude of the curvature change between the third arc portion and the fourth arc portion when the second swing arm rotates relative to the limit base, thereby ensuring the smoothness of the rotation of the second rotating shaft portion relative to the limit base.

[0014] In one embodiment, the first rotating shaft portion also includes a fifth arc portion distributed along the circumference of the first rotating shaft portion, the fifth arc portion is fixedly connected to an end of the second arc portion away from the first arc portion, the axis of the fifth arc portion coincides with the axis of the second arc portion, and the radius of the fifth arc portion is different from the radius of the second arc portion.

[0015] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the fifth arc-shaped portion is located in the neutral layer of the display screen, the rotation center of the first swing arm is always located in the neutral layer of the display screen when it rotates relative to the limiting base, so that the rotation of the first swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the first swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0016] In one embodiment, the difference between the radius of the fifth arc portion and the radius of the second arc portion is between 0.1 mm and 10 cm, so that when the first rotating shaft portion rotates relative to the limit base, the amplitude of the curvature change between the fifth arc portion and the second arc portion can be reduced, thereby ensuring the smoothness of the rotation of the first rotating shaft portion relative to the limit base.

[0017] In one embodiment, the second rotating shaft portion also includes a sixth arc portion distributed along the circumference of the second rotating shaft portion, the sixth arc portion is fixedly connected to the fourth arc portion, the axis of the sixth arc portion coincides with the axis of the fourth arc portion, and the radius of the sixth arc portion is different from the radius of the fourth arc portion.

[0018] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the sixth arc-shaped portion is located in the neutral layer of the display screen, the rotation center of the second swing arm is always located in the neutral layer of the display screen when it rotates relative to the limiting base, so that the rotation of the second swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the second swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0019] In one embodiment, the difference between the radius of the sixth arc portion and the radius of the fourth arc portion is between 0.1 mm and 10 cm, so that when the second rotating shaft portion rotates relative to the limit base, the amplitude of the curvature change between the sixth arc portion and the fourth arc portion can be reduced, thereby ensuring the smoothness of the rotation of the second rotating shaft portion relative to the limit base.

[0020] In one embodiment, the first swing arm further includes a first swing portion fixedly connected to the first rotating shaft portion, the first swing portion extending relative to the first arcuate slot. When the first swing portion rotates relative to the position-limiting base, it drives the first rotating shaft portion to slide within the first arcuate slot, thereby enabling the first rotating shaft portion to rotate relative to the position-limiting base, thereby enabling the first swing arm to rotate relative to the position-limiting base.

[0021] The second swing arm further includes a second swing portion fixedly connected to the second rotating shaft portion, the second swing portion extending relative to the second arcuate slot. When the second swing portion rotates relative to the position-limiting base, it drives the second rotating shaft portion to slide within the second arcuate slot, thereby enabling the second rotating shaft portion to rotate relative to the position-limiting base, thereby enabling the second swing arm to rotate relative to the position-limiting base.

[0022] In one embodiment, the limiting base is provided with two first arcuate grooves and two second arcuate grooves. Along the Y-axis direction, the two first arcuate grooves are arranged at intervals, and the two second arcuate grooves are arranged at intervals.

[0023] The rotating mechanism includes two first swing arms and two second swing arms. The two first rotating shafts are respectively slidably mounted on the two first arc grooves, and the two second rotating shafts are respectively slidably mounted on the two second arc grooves to improve the rotation stability of the rotating mechanism.

[0024] In one embodiment, the rotating mechanism has a symmetry plane, and the rotating mechanism is mirror-symmetrical about the symmetry plane to ensure the rotational stability of the rotating mechanism.

[0025] In one embodiment, the limiting base includes a lower limiting block and an upper limiting block. The upper limiting block is installed on the lower limiting block and is enclosed with the lower limiting block to form a first arc groove and a second arc groove.

[0026] The upper limit block and the lower limit block may be integrally formed, or the upper limit block and the lower limit block may be assembled to form an integrated structure to ensure the overall strength of the rotating mechanism.

[0027] In one embodiment, the rotating mechanism further includes a shell, and the limiting base, the first swing arm and the second swing arm are all installed on the inner side of the shell.

[0028] In a second aspect, the present application provides a rotating mechanism for use in a foldable terminal, wherein the foldable terminal includes a display screen, and the display screen includes a neutral layer. It should be noted that since the display screen includes multiple structural layers, the materials of each structural layer are different, and the stretchability of each structural layer will also be different. During the folding process of the foldable terminal, the stretchability of each layer structure in the display screen will be different, some structural layers will be stretched, and some structural layers will be compressed. The neutral layer may include one or more structural layers. During the folding process of the foldable terminal, the neutral layer is a layer structure in the display screen that is neither stretched nor compressed, or the neutral layer is a layer structure in the display screen with a smaller stretch rate and a smaller compression rate.

[0029] The rotation mechanism includes a position-limiting base, a first swing arm, and a second swing arm. The position-limiting base is provided with a first arcuate slot and a second arcuate slot. The first swing arm includes a first rotation axis portion, which is slidably mounted in the first arcuate slot and is rotatable relative to the position-limiting base. The second swing arm includes a second rotation axis portion, which is slidably mounted in the second arcuate slot and is rotatable relative to the position-limiting base. The first and second rotation axes rotate in opposite directions relative to the position-limiting base.

[0030] Among them, the first rotating shaft portion includes a first arc portion and a second arc portion distributed along the circumference of the first rotating shaft portion, the first arc portion and the second arc portion are fixedly connected, the axis center of the first arc portion and the axis center of the second arc portion are both located in the neutral layer and are spaced from each other.

[0031] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the first arc-shaped portion and the axis of the second arc-shaped portion are both located in the neutral layer of the display screen, the rotation center of the first swing arm is located in the neutral layer of the display screen when the first swing arm rotates relative to the limiting base, so that the rotation of the first swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the first swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0032] In one embodiment, the radius of the first arc portion is the same as the radius of the second arc portion, or the difference between the radius of the first arc portion and the radius of the second arc portion is between 0.1 mm and 10 cm, so as to reduce the amplitude of the curvature change between the first arc portion and the second arc portion when the first rotating shaft portion rotates relative to the limiting base, thereby ensuring the smoothness of the rotation of the first rotating shaft portion relative to the limiting base.

[0033] In one embodiment, the second rotating shaft portion includes a third arc portion and a fourth arc portion distributed along the circumference of the second rotating shaft portion, the third arc portion is fixedly connected to the fourth arc portion, and the axis center of the third arc portion and the axis center of the fourth arc portion are both located in the neutral layer and are spaced from each other.

[0034] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis centers of the third arc-shaped portion and the fourth arc-shaped portion are both located in the neutral layer of the display screen, the rotation center of the second swing arm is located in the neutral layer of the display screen when the second swing arm rotates relative to the limiting base, so that the rotation of the second swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the second swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0035] In one embodiment, the radius of the third arc portion is the same as the radius of the fourth arc portion, or the difference between the radius of the third arc portion and the radius of the fourth arc portion is between 0.1 mm and 10 cm, so as to reduce the amplitude of the curvature change between the third arc portion and the fourth arc portion when the second swing arm rotates relative to the limit base, thereby ensuring the smoothness of the rotation of the second rotating shaft portion relative to the limit base.

[0036] In one embodiment, the first rotating shaft portion also includes a fifth arc portion distributed along the circumference of the first rotating shaft portion, the fifth arc portion is fixedly connected to an end of the second arc portion away from the first arc portion, the axis of the fifth arc portion is located in the neutral layer, and is spaced apart from the axis of the second arc portion.

[0037] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the fifth arc-shaped portion is located in the neutral layer of the display screen, the rotation center of the first swing arm is always located in the neutral layer of the display screen when it rotates relative to the limiting base, so that the rotation of the first swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the first swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0038] In one embodiment, the radius of the fifth arc portion is the same as the radius of the second arc portion, or the radius of the fifth arc portion is different from the radius of the second arc portion, and the difference between the radius of the fifth arc portion and the radius of the second arc portion is between 0.1 mm and 10 cm, so that when the first rotating shaft portion rotates relative to the limiting base, the amplitude of the curvature change between the fifth arc portion and the second arc portion can be reduced, thereby ensuring the smoothness of the rotation of the first rotating shaft portion relative to the limiting base.

[0039] In one embodiment, the second rotating shaft portion further includes a sixth arc portion distributed along the circumference of the second rotating shaft portion, the sixth arc portion is fixedly connected to the fourth arc portion, the axis of the sixth arc portion is located in the neutral layer, and is spaced apart from the axis of the fourth arc portion.

[0040] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the sixth arc-shaped portion is located in the neutral layer of the display screen, the rotation center of the second swing arm is always located in the neutral layer of the display screen when it rotates relative to the limiting base, so that the rotation of the second swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the second swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0041] In one embodiment, the radius of the sixth arc portion is the same as the radius of the fourth arc portion, or the radius of the sixth arc portion is different from the radius of the fourth arc portion, and the difference between the radius of the sixth arc portion and the radius of the fourth arc portion is between 0.1 mm and 10 cm, so that when the second rotating shaft portion rotates relative to the limit base, the amplitude of the curvature change between the sixth arc portion and the fourth arc portion can be reduced, thereby ensuring the smoothness of the rotation of the second rotating shaft portion relative to the limit base.

[0042] In one embodiment, the first swing arm further includes a first swing portion fixedly connected to the first rotating shaft portion, the first swing portion extending relative to the first arcuate slot. When the first swing portion rotates relative to the position-limiting base, it drives the first rotating shaft portion to slide within the first arcuate slot, thereby enabling the first rotating shaft portion to rotate relative to the position-limiting base, thereby enabling the first swing arm to rotate relative to the position-limiting base.

[0043] The second swing arm further includes a second swing portion fixedly connected to the second rotating shaft portion, the second swing portion extending relative to the second arcuate slot. When the second swing portion rotates relative to the position-limiting base, it drives the second rotating shaft portion to slide within the second arcuate slot, thereby enabling the second rotating shaft portion to rotate relative to the position-limiting base, thereby enabling the second swing arm to rotate relative to the position-limiting base.

[0044] In one embodiment, the limiting base is provided with two first arcuate grooves and two second arcuate grooves. Along the Y-axis direction, the two first arcuate grooves are arranged at intervals, and the two second arcuate grooves are arranged at intervals.

[0045] The rotating mechanism includes two first swing arms and two second swing arms. The two first rotating shafts are respectively slidably mounted on the two first arc grooves, and the two second rotating shafts are respectively slidably mounted on the two second arc grooves to improve the rotation stability of the rotating mechanism.

[0046] In one embodiment, the rotating mechanism has a symmetry plane, and the rotating mechanism is mirror-symmetrical about the symmetry plane to ensure the rotational stability of the rotating mechanism.

[0047] In one embodiment, the limiting base includes a lower limiting block and an upper limiting block. The upper limiting block is installed on the lower limiting block and is enclosed with the lower limiting block to form a first arc groove and a second arc groove.

[0048] The upper limit block and the lower limit block may be integrally formed, or the upper limit block and the lower limit block may be assembled to form an integrated structure to ensure the overall strength of the rotating mechanism.

[0049] In one embodiment, the rotating mechanism further includes a shell, and the limiting base, the first swing arm and the second swing arm are all installed on the inner side of the shell.

[0050] In a third aspect, the present application provides a rotation mechanism for use in a foldable terminal. The foldable terminal includes a display screen, the display screen including a first structural layer and a second structural layer stacked together. During folding of the foldable terminal, the first structural layer experiences a greater tensile deformation than the second structural layer.

[0051] The rotation mechanism includes a position-limiting base, a first swing arm, and a second swing arm. The position-limiting base is provided with a first arcuate slot and a second arcuate slot. The first swing arm includes a first rotation axis portion, which is slidably mounted in the first arcuate slot and is rotatable relative to the position-limiting base. The second swing arm includes a second rotation axis portion, which is slidably mounted in the second arcuate slot and is rotatable relative to the position-limiting base. The first and second rotation axes rotate in opposite directions relative to the position-limiting base.

[0052] Among them, the first rotating shaft portion includes a first arc portion and a second arc portion distributed along the circumference of the first rotating shaft portion, the first arc portion and the second arc portion are fixedly connected, the axis of the first arc portion is located in the first structural layer, and the axis of the second arc portion is located in the second structural layer, and is located on the side of the axis of the first arc portion away from the second swing arm.

[0053] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the first arc-shaped portion is located in the first structural layer, the axis of the second arc-shaped portion is located in the second structural layer, and is located on the side of the axis of the first arc-shaped portion away from the second swing arm, the tensile deformation of the first structural layer can be reduced to match the tensile deformation of the second structural layer, thereby improving the matching degree between the first structural layer and the second structural layer, so that the rotation process of the first swing arm relative to the limiting base can match the bending process of the display screen 200, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles on the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0054] In one embodiment, the radius of the first arc portion is the same as the radius of the second arc portion, or the radius of the first arc portion is different from the radius of the second arc portion, and the difference between the radius of the first arc portion and the radius of the second arc portion is between 0.1 mm and 10 cm, so as to reduce the amplitude of the curvature change between the first arc portion and the second arc portion when the first rotating shaft portion rotates relative to the limiting base, thereby ensuring the smoothness of the rotation of the first rotating shaft portion relative to the limiting base.

[0055] In one embodiment, the second rotating shaft portion includes a third arc portion and a fourth arc portion distributed along the circumference of the second rotating shaft portion, the third arc portion is fixedly connected to the fourth arc portion, the axis of the third arc portion is located in the first structural layer, the axis of the fourth arc portion is located in the second structural layer, and is located on the side of the axis of the third arc portion away from the first swing arm.

[0056] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the third arc portion is located in the first structural layer, the axis of the fourth arc portion is located in the second structural layer, and is located on the side of the axis of the third arc portion away from the first swing arm, the tensile deformation of the first structural layer can be reduced to match the tensile deformation of the second structural layer, thereby improving the matching degree between the first structural layer and the second structural layer, so that the rotation process of the second swing arm relative to the limiting base can match the bending process of the display screen, and the excessive pulling of the first structural layer during the rotation of the second swing arm can be reduced, thereby reducing the pulling of the rotating mechanism on the display screen, avoiding the problem of wrinkles on the display screen due to pulling, and ensuring the reliability of the foldable terminal.

[0057] In one embodiment, the radius of the third arc portion is the same as the radius of the fourth arc portion, or the difference between the radius of the third arc portion and the radius of the fourth arc portion is between 0.1 mm and 10 cm, so as to reduce the amplitude of the curvature change between the third arc portion and the fourth arc portion when the second swing arm rotates relative to the limit base, thereby ensuring the smoothness of the rotation of the second rotating shaft portion relative to the limit base.

[0058] In one embodiment, the display screen further includes a third structural layer, and the third structural layer, the first structural layer and the second structural layer are stacked. During the folding process of the foldable terminal, the tensile deformation of the third structural layer is smaller than the tensile deformation of the second structural layer.

[0059] The first rotating shaft portion also includes a fifth arc portion distributed along the circumference of the first rotating shaft portion, the fifth arc portion is fixedly connected to an end of the second arc portion away from the first arc portion, the axis of the fifth arc portion is located in the third structural layer, and is located on the side of the axis of the second arc portion away from the second swing arm.

[0060] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the fifth arc-shaped portion is located within the third structural layer and is located on the side of the axis of the second arc-shaped portion away from the second swing arm, the tensile deformation of the first structural layer and the second structural layer can be reduced to match the tensile deformation of the third structural layer. Therefore, the matching degree between the first structural layer, the second structural layer and the third structural layer can be improved, so that the rotation process of the first swing arm relative to the limiting base can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles on the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0061] In one embodiment, the radius of the fifth arc portion is the same as the radius of the second arc portion, or the radius of the fifth arc portion is different from the radius of the second arc portion, and the difference between the radius of the fifth arc portion and the radius of the second arc portion is between 0.1 mm and 10 cm, so that when the first rotating shaft portion rotates relative to the limiting base, the amplitude of the curvature change between the fifth arc portion and the second arc portion can be reduced, thereby ensuring the smoothness of the rotation of the first rotating shaft portion relative to the limiting base.

[0062] In one embodiment, the second rotating shaft portion also includes a sixth arc portion distributed along the circumference of the second rotating shaft portion, the sixth arc portion is fixedly connected to the fourth arc portion, the axis of the sixth arc portion is located in the third structural layer, and is located on the side of the axis of the fourth arc portion away from the first swing arm.

[0063] When the rotating mechanism shown in the present application is used for a foldable terminal, during the folding process of the foldable terminal, since the axis of the sixth arc-shaped portion is located within the third structural layer and is located on the side of the axis of the fourth arc-shaped portion away from the first swing arm, the tensile deformation of the first structural layer and the second structural layer can be reduced to match the tensile deformation of the third structural layer. Therefore, the matching degree between the first structural layer, the second structural layer and the third structural layer can be improved, so that the rotation process of the second swing arm relative to the limiting base can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles on the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0064] In one embodiment, the radius of the sixth arc portion is the same as the radius of the fourth arc portion, or the radius of the sixth arc portion is different from the radius of the fourth arc portion, and the difference between the radius of the sixth arc portion and the radius of the fourth arc portion is between 0.1 mm and 10 cm, so that when the second rotating shaft portion rotates relative to the limit base, the amplitude of the curvature change between the sixth arc portion and the fourth arc portion can be reduced, thereby ensuring the smoothness of the rotation of the second rotating shaft portion relative to the limit base.

[0065] In one embodiment, the first swing arm further includes a first swing portion fixedly connected to the first rotating shaft portion, the first swing portion extending relative to the first arcuate slot. When the first swing portion rotates relative to the position-limiting base, it drives the first rotating shaft portion to slide within the first arcuate slot, thereby enabling the first rotating shaft portion to rotate relative to the position-limiting base, thereby enabling the first swing arm to rotate relative to the position-limiting base.

[0066] The second swing arm further includes a second swing portion fixedly connected to the second rotating shaft portion, the second swing portion extending relative to the second arcuate slot. When the second swing portion rotates relative to the position-limiting base, it drives the second rotating shaft portion to slide within the second arcuate slot, thereby enabling the second rotating shaft portion to rotate relative to the position-limiting base, thereby enabling the second swing arm to rotate relative to the position-limiting base.

[0067] In one embodiment, the limiting base is provided with two first arcuate grooves and two second arcuate grooves. Along the Y-axis direction, the two first arcuate grooves are arranged at intervals, and the two second arcuate grooves are arranged at intervals.

[0068] The rotating mechanism includes two first swing arms and two second swing arms. The two first rotating shafts are respectively slidably mounted on the two first arc grooves, and the two second rotating shafts are respectively slidably mounted on the two second arc grooves to improve the rotation stability of the rotating mechanism.

[0069] In one embodiment, the rotating mechanism has a symmetry plane, and the rotating mechanism is mirror-symmetrical about the symmetry plane to ensure the rotational stability of the rotating mechanism.

[0070] In one embodiment, the limiting base includes a lower limiting block and an upper limiting block. The upper limiting block is installed on the lower limiting block and is enclosed with the lower limiting block to form a first arc groove and a second arc groove.

[0071] The upper limit block and the lower limit block may be integrally formed, or the upper limit block and the lower limit block may be assembled to form an integrated structure to ensure the overall strength of the rotating mechanism.

[0072] In one embodiment, the rotating mechanism further includes a shell, and the limiting base, the first swing arm and the second swing arm are all installed on the inner side of the shell.

[0073] In a fourth aspect, the present application provides a foldable terminal, comprising a first shell, a second shell, a display screen, and any one of the rotating mechanisms shown in the first or second aspect above, wherein the first swing arm is fixedly connected to the first shell, the second swing arm is fixedly connected to the second shell, the display screen comprises a neutral layer, the axis of the first arc-shaped portion and the axis of the second arc-shaped portion are both located in the neutral layer and coincide with each other, and the radius of the first arc-shaped portion is different from the radius of the second arc-shaped portion.

[0074] The first swinging part is fixedly connected to the first shell, and the second swinging part is fixedly connected to the second shell.

[0075] During the folding process of the foldable terminal shown in the present application, since the axis of the first arc-shaped portion and the axis of the second arc-shaped portion are both located in the neutral layer of the display screen, the rotation center of the first swing arm is located in the neutral layer of the display screen when the first swing arm rotates relative to the limiting base, so that the rotation of the first swing arm relative to the limiting base can match the change of the neutral layer. Therefore, the rotation process of the first swing arm can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles in the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0076] In one embodiment, the display screen includes multiple structural layers, and the neutral layer includes one or more structural layers.

[0077] In one embodiment, the display screen includes a base layer, a display function layer, a polarizer, an adhesive layer, and a protective layer, and the display function layer, the polarizer, the adhesive layer, and the protective layer are sequentially stacked on the top surface of the base layer.

[0078] In one embodiment, the neutral layer includes a display function layer, and the axis of the first arc portion and the axis of the second arc portion are both located in the display function layer, so as to prevent the display function layer from being excessively pulled and split during the folding process of the foldable terminal, thereby ensuring the reliability of the foldable terminal.

[0079] In one embodiment, the neutral layer includes a polarizer, and the axis of the first arc-shaped portion and the axis of the second arc-shaped portion are both located inside the polarizer.

[0080] In some other embodiments, the neutral layer includes a display function layer and a polarizer, and the axis of the first arc-shaped portion and the axis of the second arc-shaped portion are both located in the display function layer or in the polarizer.

[0081] In one embodiment, the display screen includes a first display part, a second display part and a bendable part, the bendable part is connected between the first display part and the second display part, the first display part is installed on the first shell, the second display part is installed on the second shell, and the bendable part is arranged opposite to the rotating mechanism.

[0082] In a fifth aspect, the present application provides a foldable terminal comprising a first housing, a second housing, a display screen, and any of the rotation mechanisms described in the third aspect. A first swing arm is fixedly connected to the first housing, and a second swing arm is fixedly connected to the second housing. The first swing portion is fixedly connected to the first housing, and the second swing portion is fixedly connected to the second housing. The display screen is mounted between the first and second housings, and comprises a first structural layer and a second structural layer.

[0083] During the folding process of the foldable terminal shown in the present application, since the axis of the first arc-shaped portion is located in the first structural layer, the axis of the second arc-shaped portion is located in the second structural layer, and is located on the side of the axis of the first arc-shaped portion away from the second swing arm, the tensile deformation of the first structural layer can be reduced to match the tensile deformation of the second structural layer. Therefore, the matching degree between the first structural layer and the second structural layer can be improved, and the excessive pulling of the first structural layer during the rotation of the first swing arm is reduced, which reduces the pulling of the rotating mechanism on the display screen, avoids the problem of wrinkles on the display screen due to pulling, and ensures the reliability of the foldable terminal.

[0084] In one embodiment, the display screen further includes a third structural layer, and the third structural layer, the first structural layer and the second structural layer are stacked. During the folding process of the foldable terminal, the tensile deformation of the third structural layer is smaller than the tensile deformation of the second structural layer.

[0085] The first rotating shaft portion also includes a fifth arc portion distributed along the circumference of the first rotating shaft portion, the fifth arc portion is fixedly connected to an end of the second arc portion away from the first arc portion, the axis of the fifth arc portion is located in the third structural layer, and is located on the side of the axis of the second arc portion away from the second swing arm.

[0086] During the folding process of the foldable terminal shown in the present application, since the axis of the fifth arc-shaped portion is located within the third structural layer and on the side of the axis of the second arc-shaped portion away from the second swing arm, the tensile deformation of the first structural layer and the second structural layer can be reduced to match the tensile deformation of the third structural layer. Therefore, the matching degree between the first structural layer, the second structural layer and the third structural layer can be improved, so that the rotation process of the first swing arm relative to the limiting base can match the bending process of the display screen, which can reduce the pulling of the rotating mechanism on the display screen, avoid the problem of wrinkles on the display screen due to pulling, and ensure the reliability of the foldable terminal.

[0087] In one embodiment, the display screen includes a base layer, a display function layer, a polarizer, an adhesive layer and a protective layer stacked in sequence, the base layer is the first structural layer, the display function layer is the second structural layer, and the polarizer is the third structural layer.

[0088] In one embodiment, the display screen includes a first display part, a second display part and a bendable part, the bendable part is connected between the first display part and the second display part, the first display part is installed on the first shell, the second display part is installed on the second shell, and the bendable part is arranged opposite to the rotating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0090] Figure 1 is a structural schematic diagram of a foldable terminal provided by an embodiment of the present application in a first state;

[0091] Figure 2 yes Figure 1 The schematic structural diagram of the foldable terminal shown is in the second state;

[0092] Figure 3 yes Figure 2 A schematic diagram of the exploded structure of the foldable terminal shown;

[0093] Figure 4 yes Figure 3 A schematic cross-sectional structure diagram of the display screen of the foldable terminal taken along line II;

[0094] Figure 5 yes Figure 3 A schematic structural diagram of a rotating mechanism in the foldable terminal shown;

[0095] Figure 6 yes Figure 5 The cross-sectional structure diagram of the rotating mechanism shown is taken along II-II;

[0096] Figure 7 yes Figure 2 A schematic cross-sectional view of the foldable terminal taken along line III-III;

[0097] Figure 8 yes Figure 7 The structure diagram of the first swing arm of the foldable terminal shown in the first embodiment;

[0098] Figure 9 yes Figure 7 The schematic diagram of the partial structure of the foldable terminal in the first embodiment is shown;

[0099] Figure 10 yes Figure 7 The schematic diagram of the partial structure of the foldable terminal in the second embodiment is shown;

[0100] Figure 11 yes Figure 7 A schematic diagram of a partial structure of the foldable terminal in a third embodiment is shown;

[0101] Figure 12 yes Figure 7 FIG. 1 is a schematic diagram of a partial structure of a foldable terminal in a fourth embodiment. DETAILED DESCRIPTION

[0102] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0103] See also Figure 1 and Figure 2 , Figure 1 is a structural diagram of a foldable terminal 1000 provided in an embodiment of the present application in a first state. Figure 2 yes Figure 1 The structure diagram of the foldable terminal 1000 is shown in the second state.

[0104] For the convenience of description, we define Figure 2 The width direction of the foldable terminal 1000 is the X-axis direction, the length direction of the foldable terminal 1000 is the Y-axis direction, and the thickness direction of the foldable terminal 1000 is the Z-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

[0105] The foldable terminal 1000 can be a foldable electronic product such as a mobile phone, tablet computer, personal computer, multimedia player, e-book reader, laptop computer, in-vehicle device, or wearable device. In this embodiment, the foldable terminal 1000 is a foldable mobile phone. That is, the foldable terminal 1000 is a mobile phone that can switch between a folded state and an unfolded state. In this embodiment of the application, the foldable terminal 1000 is described as being able to fold or unfold along the X-axis.

[0106] in, Figure 1 The foldable terminal 1000 is shown in a folded state. Figure 2 The foldable terminal 1000 is shown in an unfolded state. Figure 2 The unfolding angle α of the foldable terminal 1000 is 180 degrees. Figure 2 The foldable terminal 1000 is shown in a flattened state.

[0107] It should be noted that in the embodiments of the present application, the angles described as examples are allowed to have slight deviations. For example, Figure 2 The unfolding angle α of the foldable terminal 1000 is shown as 180 degrees, which means that α can be 180 degrees or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees. The angles described below by way of example can be understood in the same way.

[0108] It should be understood that the foldable terminal 1000 shown in the embodiment of the present application is a terminal that can be folded once. In other embodiments, the foldable terminal 1000 can also be a terminal that can be folded multiple times (more than twice). In this case, the foldable terminal 1000 can include multiple parts, where two adjacent parts can be folded relatively close together until the foldable terminal 1000 is in a folded state, and two adjacent parts can be unfolded relatively far apart until the foldable terminal 1000 is in an unfolded state.

[0109] Please also refer to Figure 3 , Figure 3 yes Figure 2 FIG. 1 is a schematic diagram of the exploded structure of the foldable terminal 1000 .

[0110] The foldable terminal 1000 includes a foldable device 100 and a display screen 200. The display screen 200 is mounted on the foldable device 100 and is used to display information such as text, images, or videos. In this embodiment, the display screen 200 includes a first display portion 210, a second display portion 220, and a bendable portion 230. The bendable portion 230 is connected between the first and second display portions 210 and 220. The bendable portion 230 can be bent along the X-axis.

[0111] like Figure 1 As shown, when the foldable terminal 1000 is in the folded state, the first display portion 210 and the second display portion 220 are arranged relative to each other, and the bendable portion 230 is bent. At this time, the display screen 200 is in the folded state, and the exposed area of the display screen 200 is relatively small, which can greatly reduce the probability of the display screen 200 being damaged and achieve effective protection for the display screen 200. Figure 2 As shown, the foldable terminal 1000 is in the unfolded state, with the first display portion 210 and the second display portion 220 relatively unfolded, and the bendable portion 230 flattened without bending. At this point, the angles α between the first display portion 210, the second display portion 220, and the bendable portion 230 are all defined. The display screen 200 has a large display area, enabling a large-screen display for the foldable terminal 1000 and improving the user experience.

[0112] In this embodiment, the foldable device 100 includes a first housing 110, a second housing 120, and a rotation mechanism 130. The rotation mechanism 130 is connected between the first housing 110 and the second housing 120 to achieve a rotational connection between the first housing 110 and the second housing 120. Specifically, the first housing 110 supports the first display portion 210, and the second housing 120 supports the second display portion 220. In other words, the first display portion 210 is mounted on the first housing 110, and the second display portion 220 is mounted on the second housing 120. The rotation mechanism 130 is disposed opposite the bendable portion 230.

[0113] The first shell 110 and the second shell 120 can be relatively rotated by the rotating mechanism 130, so that the foldable device 100 can be switched between the folded state and the unfolded state. Specifically, the first shell 110 and the second shell 120 can be relatively rotated to be opposite to each other, so that the foldable device 100 is in the folded state, such as Figure 1 The first shell 110 and the second shell 120 can also be rotated relative to each other to unfold relative to each other, so that the foldable device 100 is in an unfolded state, as shown. Figure 2 As shown. For example, Figure 2 The foldable terminal 1000 is shown in an unfolded state, and the angle between the first housing 110 and the second housing 120 is α.

[0114] The first housing 110 is provided with a first receiving groove 1101, which is located on the side of the first housing 110 facing the second housing 120. The opening of the first receiving groove 1101 is located on the top surface of the first housing 110. The first receiving groove 1101 is recessed from the top surface to the bottom surface of the first housing 110 and passes through the side surface of the first housing 110 facing the second housing 120. The bottom wall of the first receiving groove 1101 is provided with a first step 1102, and the step surface of the first step 1102 is located between the top surface of the first housing 110 and the bottom wall of the first receiving groove 1101.

[0115] The second shell 120 and the first shell 110 have the same structure and are mirror-symmetrical with respect to the rotating mechanism 130. The second shell 120 is provided with a second receiving groove 1201, and the second receiving groove 1201 is located on the side of the second shell 120 facing the first shell 110. The opening of the second receiving groove 1201 is located on the top surface of the second shell 120. The second receiving groove 1201 is recessed from the top surface to the bottom surface of the second shell 120, and passes through the side of the second shell 120 facing the first shell 110. Among them, the bottom wall of the second receiving groove 1201 is convexly provided with a second step 1202, and the step surface of the second step 1202 is located between the top surface of the second shell 120 and the bottom wall of the second receiving groove 1201. Figure 3 As shown, when the foldable device 100 is in a flattened state, that is, when the angle between the first shell 110 and the second shell 120 is α, the first receiving groove 1101 and the second receiving groove 1201 enclose a receiving space 1001 , and the receiving space 1001 receives the rotating mechanism 130 .

[0116] It should be noted that the directional terms such as “top” and “bottom” used in the embodiment of the present application to describe the foldable terminal 1000 are mainly based on the foldable terminal 1000 being attached to the Figure 2 The display orientation is explained in the figure, with the positive direction of the Z axis as the "top" and the negative direction of the Z axis as the "bottom", which does not limit the orientation of the foldable terminal 1000 in actual application scenarios.

[0117] See also Figure 4 , Figure 4 yes Figure 3 The cross-sectional structure diagram of the display screen 200 in the foldable terminal 1000 is shown along line II. It should be noted that in the drawings of this application, "cutting along line II" means cutting along the plane where line II is located, and the following description of the drawings can be understood in the same way.

[0118] In this embodiment, the display screen 200 includes five stacked structural layers. The five stacked structural layers are a first structural layer 240, a second structural layer 250, a third structural layer 260, a fourth structural layer 270, and a fifth structural layer 280. The second structural layer 250, the third structural layer 260, the fourth structural layer 270, and the fifth structural layer 280 are sequentially stacked on top of the first structural layer 240. In other embodiments, the display screen 200 may include two, three, four, or more than five structural layers, which is not specifically limited in this application.

[0119] Specifically, the first structural layer 240 is a base layer, the second structural layer 250 is a display function layer, the third structural layer 260 is a polarizer, the fourth structural layer 270 is an adhesive layer, and the fifth structural layer 280 is a protective layer. The base layer is a structural layer that provides support for the display screen 200. For example, the base layer can be a steel base. In other embodiments, the base layer can include one or more supporting structural layers (not shown). Each supporting structural layer can be made of foam, polyimide (PI), or metal bamboo, etc., to provide the base layer with a certain strength and rigidity to support the display function layer.

[0120] The display function layer is the structural layer within the display screen 200 that performs display functions. A polarizer is stacked on top of the display function layer. Because the base layer, display function layer, and polarizer are made of different materials, the base layer, display function layer, and polarizer all experience different amounts of stretching deformation during the folding process of the foldable terminal 1000. Specifically, the stretching deformation of the base layer is greater than that of the display function layer, which in turn is greater than that of the polarizer. Specifically, the stretching deformation of the first structural layer 240 is greater than that of the second structural layer 250, which in turn is greater than that of the third structural layer 260.

[0121] The protective layer is a structural layer within display screen 200 that provides protection. It is located on top of the polarizer, with the adhesive layer connected between the protective layer and the polarizer. The protective layer protects the display layer. The adhesive layer can be double-sided tape, with the top surface of the adhesive layer bonded to the bottom surface of the protective layer, and the bottom surface of the adhesive layer bonded to the top surface of the polarizer.

[0122] Furthermore, the display screen 200 includes a neutral layer 200a, which may include one or more structural layers. In this embodiment, the neutral layer 200a includes a third structural layer 260. In other embodiments, the neutral layer 200a may also include a second structural layer 250, or the neutral layer 200a may include both the second structural layer 250 and the third structural layer 260.

[0123] It should be noted that because the display screen 200 is a multi-layered structure with different materials in each structural layer, the tensile deformation of each structural layer will also vary. During the folding process of the foldable terminal 1000, some structural layers will be stretched, while others will be compressed. During the folding process of the foldable terminal 1000, the neutral layer 200a is a layer structure in the display screen 200 that is neither stretched nor compressed. Alternatively, the neutral layer 200a can be a layer structure in the display screen 200 that has both small tensile and compressive deformations.

[0124] See also Figure 5 and Figure 6 , Figure 5 yes Figure 3 The structural diagram of the rotating mechanism 130 in the foldable terminal 1000 is shown. Figure 6 yes Figure 5 The cross-sectional structure diagram of the rotating mechanism 130 is shown along II-II.

[0125] In this embodiment, the rotating mechanism 130 has a symmetry plane O, and the rotating mechanism 130 is mirror-symmetrical about the symmetry plane O to ensure the rotational stability of the rotating mechanism 130. In some other embodiments, the rotating mechanism 130 may not have a symmetry plane O. This application does not specifically limit whether the rotating mechanism 130 is symmetrical. Specifically, the rotating mechanism 130 includes a housing 10, a limiting base 20, a first swing arm 30, and a second swing arm 40. The limiting base 20, the first swing arm 30, and the second swing arm 40 are all installed on the inner side of the housing 10. The limiting base 20 is provided with a first arcuate groove 201 and a second arcuate groove 202. The first swing arm 30 is slidably mounted in the first arcuate groove 201 and can rotate relative to the limiting base 20. The second swing arm 40 is slidably mounted in the second arcuate groove 202 and can rotate relative to the limiting base 20.

[0126] The first swing arm 30 and the second swing arm 40 rotate in opposite directions relative to the limiting base 20. For example, the first swing arm 30 rotates clockwise relative to the limiting base 20 (in the ω1 direction shown in the figure), and the second swing arm 40 rotates counterclockwise relative to the limiting base 20 (in the ω2 direction shown in the figure). At this point, the first swing arm 30 and the second swing arm 40 rotate relative to the limiting base 20 to fold relative to each other. Alternatively, the first swing arm 30 rotates counterclockwise relative to the limiting base 20, and the second swing arm 40 rotates clockwise relative to the limiting base 20. At this point, the first swing arm 30 and the second swing arm 40 rotate relative to the limiting base 20 to unfold relative to each other.

[0127] Exemplarily, the limiting base 20 is provided with two first arcuate grooves 201 and two second arcuate grooves 202. The rotating mechanism 130 includes two first swing arms 30 and two second swing arms 40. The two first arcuate grooves 201 are arranged at intervals from each other along the Y-axis direction, and the two second arcuate grooves 202 are arranged at intervals from each other along the Y-axis direction. The two first swing arms 30 are respectively slidably mounted on the two first arcuate grooves 201 and are arranged at intervals from each other along the Y-axis direction. The two second swing arms 40 are respectively slidably mounted on the two second arcuate grooves 202 and are arranged at intervals from each other along the Y-axis direction. In some other embodiments, there may be one or more than three first arcuate grooves 201, second arcuate grooves 202, first swing arms 30 and second swing arms 40, and this is not specifically limited in the embodiments of the present application.

[0128] In this embodiment, the limit base 20 includes a lower limit block 21 and an upper limit block 22. The upper limit block 22 is installed on the lower limit block 21 and encloses a first arc groove 201 and a second arc groove 202 with the lower limit block 21. Specifically, the lower limit block 21 includes a first lower limit block 23 and a second lower limit block 24. Along the X-axis direction, the first lower limit block 23 and the second lower limit block 24 are arranged at intervals from each other. The upper limit block 22 includes a first upper limit block 25 and a second upper limit block 26. The first upper limit block 25 is installed on the first lower limit block 23 and encloses a first arc groove 201 with the first lower limit block 23. The second upper limit block 26 is installed on the second lower limit block 24 and encloses a second arc groove 202 with the second lower limit block 24. Among them, along the X-axis direction, the first arc groove 201 and the second arc groove 202 are arranged at intervals from each other. Along the Y-axis direction, the first arc-shaped groove 201 and the second arc-shaped groove 202 are completely overlapped.

[0129] It should be noted that overlapping arrangement refers to overlapping projections. For example, along the Y-axis, the first arc-shaped groove 201 and the second arc-shaped groove 202 are completely overlapping in arrangement, which means that the projections of the first arc-shaped groove 201 and the second arc-shaped groove 202 on the YZ-axis plane completely overlap. The overlapping arrangement mentioned below should be understood in the same way.

[0130] In other embodiments, the first arcuate slot 201 and the second arcuate slot 202 may be arranged overlappingly along the X-axis to reduce the size of the rotating mechanism 130 along the X-axis. Alternatively, the first arcuate slot 201 and the second arcuate slot 202 may be arranged spaced apart from each other along the Y-axis.

[0131] The first lower stopper 23 is provided with a first slide groove 231, the opening of which is located on the top surface of the first lower stopper 23. The first slide groove 231 is recessed from the top surface toward the bottom surface of the first lower stopper 23. The first slide groove 231 is an arc-shaped slide groove, with the bottom wall of the first slide groove 231 being an arc-shaped surface. Exemplarily, there are two first slide grooves 231, spaced apart from each other along the Y-axis.

[0132] The first upper limit block 25 is mounted on the top side of the first chute 231. The bottom surface of the first upper limit block 25 is an arc-shaped surface that cooperates with the bottom wall of the first chute 231, so that the first upper limit block 25 and the first limit block 11 enclose a first arcuate groove 201. The axis of the bottom surface of the first upper limit block 25 coincides with the axis of the bottom wall of the first chute 231. Exemplarily, there are two first upper limit blocks 25, and the two first upper limit blocks 25 are arranged at intervals from each other along the Y-axis direction. The two first upper limit blocks 25 are respectively mounted on the top sides of the two first chute 231, and respectively enclose the two first chute 231 to form two first arcuate grooves 201.

[0133] In some other embodiments, the two first upper limit blocks 25 can be integrally formed with the first lower limit block 23, or the two first upper limit blocks 25 can be assembled with the first lower limit block 23 to form an integrated structure to enhance the overall strength of the rotating mechanism 130.

[0134] The second lower stopper 24 is provided with a second chute 241, the opening of which is located on the top surface of the second lower stopper 24. The second chute 241 is recessed from the top surface toward the bottom surface of the second lower stopper 24. The second chute 241 is an arc-shaped chute, with the bottom wall of the second chute 241 being an arc-shaped surface. Exemplarily, there are two second chute 241, spaced apart from each other along the Y-axis.

[0135] The second upper limit block 26 is mounted on the top side of the second chute 241. The bottom surface of the second upper limit block 26 is an arc-shaped surface that cooperates with the bottom wall of the second chute 241, so that the second upper limit block 26 and the second lower limit block 24 enclose a second arc-shaped groove 202. The axis of the bottom surface of the second upper limit block 26 coincides with the axis of the bottom wall of the second chute 241. Exemplarily, there are two second upper limit blocks 26, and the two second upper limit blocks 26 are arranged spaced apart from each other along the Y-axis direction. The two second upper limit blocks 26 are respectively mounted on the top sides of the two second chute 241, and respectively enclose the two second chute 241 to form two second arc-shaped grooves 202.

[0136] In some other embodiments, the two second upper limit blocks 26 can be integrally formed with the second lower limit block 24, or the two second upper limit blocks 26 can be assembled with the second lower limit block 24 to form an integrated structure to enhance the overall strength of the rotating mechanism 130.

[0137] The first swing arm 30 includes a first pivot portion 31 and a first swing portion 32. The first pivot portion 31 is located at one end of the first swing arm 30, while the first swing portion 32 is located to one side of the first pivot portion 31 and is fixedly connected to the first pivot portion 31. The first pivot portion 31 is in the shape of an arc-shaped plate, while the first swing portion 32 is in the shape of a flat plate. The first pivot portion 31 protrudes away from the top surface of the first swing portion 32 and fits into the first arc-shaped groove 201.

[0138] Specifically, the first rotation shaft portion 31 is slidably mounted within the first arcuate slot 201 and is rotatable relative to the position-limiting base 20. The first rotation shaft portion 31 is clamped between the first lower position-limiting block 23 and the first upper position-limiting block 25. That is, along the Z-axis, the first lower position-limiting block 23 and the first upper position-limiting block 25 jointly position the first rotation shaft portion 31, preventing it from sliding out of the first arcuate slot 201. This ensures the reliable rotation of the first rotation shaft portion 31 relative to the position-limiting base 20, and thus the operational reliability of the rotation mechanism 130.

[0139] It should be noted that the first shaft portion 31 is adapted to the first arcuate groove 201, which means that the first shaft portion 31 can slide in the first arcuate groove 201 to achieve relative rotation between the first shaft portion 31 and the limiting base 20. The adaptation mentioned below can be understood in the same way.

[0140] The first swing portion 32 extends relative to the first arcuate slot 201. Specifically, the first swing portion 32 extends relative to the left side of the first lower stopper 23. When the first swing portion 32 rotates relative to the stopper base 20, it drives the first rotation shaft 31 to slide within the first arcuate slot 201, thereby rotating the first rotation shaft 31 relative to the stopper base 20 and, in turn, rotating the first swing arm 30 relative to the stopper base 20.

[0141] In this embodiment, the second swing arm 40 has substantially the same structure as the first swing arm 30. The second swing arm 40 includes a second pivot portion 41 and a second swing portion 42. The second pivot portion 41 is located at one end of the second swing arm 40, while the second swing portion 42 is located to one side of the second pivot portion 41 and is fixedly connected to the second pivot portion 41. The second pivot portion 41 is in the shape of an arc-shaped plate, while the second swing portion 42 is in the shape of a flat plate. The second pivot portion 41 protrudes away from the top surface of the second swing portion 42 and mates with the second arc-shaped groove 202.

[0142] Specifically, the second rotation shaft portion 41 is slidably mounted within the second arcuate slot 202 and is rotatable relative to the position-limiting base 20. The second rotation shaft portion 41 is clamped between the second lower position-limiting block 24 and the second upper position-limiting block 26. That is, along the Z-axis, the second lower position-limiting block 24 and the second upper position-limiting block 26 jointly position the second rotation shaft portion 41, preventing it from sliding out of the second arcuate slot 202. This ensures the reliable rotation of the second rotation shaft portion 41 relative to the position-limiting base 20, and thus the operational reliability of the rotation mechanism 130.

[0143] The second swing portion 42 extends relative to the second arcuate slot 202. Specifically, the second swing portion 42 extends relative to the right side of the second lower stopper 24. When the second swing portion 42 rotates relative to the stopper base 20, it drives the second rotation shaft 41 to slide within the second arcuate slot 202, thereby rotating the second rotation shaft 41 relative to the stopper base 20 and, consequently, rotating the second swing arm 40 relative to the stopper base 20.

[0144] At this time, the angle between the second swinging portion 42 and the first swinging portion 32 is α. Along the X-axis, the first rotation shaft portion 31 and the second rotation shaft portion 41 are arranged with an interval. Along the Y-axis, the first rotation shaft portion 31 and the second rotation shaft portion 41 are arranged to overlap completely, which helps to reduce the size of the rotation mechanism 130 along the Y-axis and realize a miniaturized design of the rotation mechanism 130.

[0145] In other embodiments, along the X-axis, the first rotation shaft portion 31 and the second rotation shaft portion 41 may also be arranged in a partially overlapping or fully overlapping arrangement, which helps reduce the size of the rotation mechanism 130 along the X-axis and achieve a miniaturized design of the rotation mechanism 130. Alternatively, along the Y-axis, the first rotation shaft portion 31 and the second rotation shaft portion 41 may also be arranged in a partially overlapping or spaced arrangement, which is not specifically limited in this application.

[0146] See also Figure 3 and Figure 7 , Figure 7 yes Figure 2 The cross-sectional structure diagram of the foldable terminal 1000 is shown along line III-III.

[0147] When the foldable device 100 is in the flattened state, the rotation mechanism 130 is installed in the receiving space 1001. Part of the rotation mechanism 130 is installed in the first receiving slot 1101 of the first housing 110, and part of the rotation mechanism 130 is installed in the second receiving slot 1201 of the second housing 120. Specifically, the first swing arm 30 is fixedly connected to the first housing 110, and the second swing arm 40 is fixedly connected to the second housing 120. The first swing portion 32 is fixedly connected to the first housing 110, and the second swing portion 42 is fixedly connected to the second housing 120. For example, the first swing arm 30 can be fixedly connected to the first housing 110 using screws or bolts, and the second swing arm 40 can be fixedly connected to the second housing 120 using screws or bolts. When the first housing 110 and the second housing 120 are folded or unfolded relative to each other, the first housing 110 drives the first swing arm 30 to rotate relative to the limiting base 20, and the second housing 120 drives the second swing arm 40 to rotate relative to the limiting base 20.

[0148] At this point, the top surface of the first swinging portion 32 is flush with the top surface of the second swinging portion 42. Together, the top surface of the first swinging portion 32 and the top surface of the second swinging portion 42 form a support surface 1301. The support surface 1301 can support the bendable portion 230 of the display screen 200 to ensure a good display of the display screen 200. For example, the bendable portion 230 can be attached to the support surface 1301 via an adhesive layer 300. The top surface of the first swinging portion 32 is flush with the top surface of the first housing 110, and the top surface of the second swinging portion 42 is flush with the top surface of the second housing 120. This allows the first and second swinging portions 32, 42, and the first and second housings 110, 120 to jointly support the display screen 200, thereby effectively supporting the display screen 200 when the foldable device 100 is flattened.

[0149] In addition, the rotation mechanism 130 may further include a transmission member (not shown), which is connected between the first swing arm 30 and the second swing arm 40, so that when the first swing arm 30 rotates relative to the limiting base 20, the second swing arm 40 is driven to rotate relative to the limiting base 20, or when the second swing arm 40 rotates relative to the limiting base 20, the first swing arm 30 is driven to rotate relative to the limiting base 20, so as to achieve synchronous rotation of the first swing arm 30 and the second swing arm 40 relative to the limiting base 20. For example, the transmission member can be a gear or other component that can achieve transmission.

[0150] It should be noted that in the existing rotating mechanism, the rotating shaft of each swing arm is a continuous arc-shaped plate. During the folding or unfolding of the rotating mechanism, the rotation process of each swing arm cannot match the bending process of the display screen. The rotating mechanism can easily cause pulling on the display screen, causing wrinkles on the display screen under stress, affecting the reliability of the foldable terminal.

[0151] In the rotating mechanism 130 shown in the embodiment of the present application, the first rotating shaft portion 31 and the second rotating shaft portion 41 are designed to be discontinuous arc-shaped plates. During the folding process of the foldable terminal 1000, the rotation process of the first swing arm 30 and the second swing arm 40 relative to the limiting base 20 can match the bending process of the display screen 200, thereby preventing the rotating mechanism 130 from pulling on the display screen 200 and avoiding the problem of wrinkles on the display screen 200 due to stress, thereby ensuring the reliability of the foldable terminal 1000.

[0152] Next, the structures of the first swing arm 30 and the second swing arm 40 in the rotating mechanism 130 shown in the embodiment of the present application are described in detail.

[0153] See also Figure 8 , Figure 8 yes Figure 7 The structure diagram of the first swing arm 30 of the foldable terminal 1000 in the first embodiment is shown.

[0154] The first rotating shaft portion 31 includes three arc-shaped portions distributed along the circumference of the first rotating shaft portion 31, and the three arc-shaped portions are connected in sequence. The three arc-shaped portions are respectively a first arc-shaped portion 33, a second arc-shaped portion 34, and a fifth arc-shaped portion 35. The first arc-shaped portion 33 is located at the end of the first rotating shaft portion 31 away from the first swinging portion 32, the fifth arc-shaped portion 35 is located at the end of the first rotating shaft portion 31 close to the first swinging portion 32, and is fixedly connected to the first swinging portion 32. The second arc-shaped portion 34 is connected between the first arc-shaped portion 33 and the fifth arc-shaped portion 35. In some other embodiments, the first rotating shaft portion 31 may also include two or more arc-shaped portions, which is not specifically limited in this application.

[0155] In this embodiment, the axis of the first arc portion 33 is C1, and the radius of the first arc portion 33 is R1. The axis of the second arc portion 34 is C2, and the radius of the second arc portion 34 is R2. The axis of the fifth arc portion 35 is C3, and the radius of the fifth arc portion 35 is R3. Specifically, the axis C1 of the first arc portion 33, the axis C2 of the second arc portion 34, and the axis C3 of the fifth arc portion 35 are spaced apart from each other. That is, the axis C1 of the first arc portion 33, the axis C2 of the second arc portion 34, and the axis C3 of the fifth arc portion 35 do not overlap. Specifically, the axis C1 of the first arc portion 33 and the axis C2 of the second arc portion 34 are both located below the axis C3 of the fifth arc portion 35, and the axis C1 of the first arc portion 33 is located below the axis C2 of the second arc portion 34.

[0156] In other embodiments, the axis C2 of the second curved portion 34 may be located below the axis C1 of the first curved portion 33. Alternatively, the axis C1 of the first curved portion 33 and the axis C3 of the fifth curved portion 35 may both be located below the axis C2 of the second curved portion 34, with the axis C3 of the fifth curved portion 35 located below the axis C1 of the first curved portion 33, or the axis C1 of the first curved portion 33 may be located below the axis C3 of the fifth curved portion 35. Alternatively, the axis C2 of the second curved portion 34 and the axis C3 of the fifth curved portion 35 may both be located below the axis C1 of the first curved portion 33, with the axis C2 of the second curved portion 34 located below the axis C3 of the fifth curved portion 35, or the axis C3 of the fifth curved portion 35 may be located below the axis C2 of the second curved portion 34.

[0157] In addition, the radius R1 of the first arc portion 33, the radius R2 of the second arc portion 34, and the radius R3 of the fifth arc portion 35 are equal. In other embodiments, the radius R1 of the first arc portion 33 may be equal to the radius R2 of the second arc portion 34, but not equal to the radius R3 of the fifth arc portion 35; or the radius R1 of the first arc portion 33 may be equal to the radius R3 of the fifth arc portion 35, but not equal to the radius R3 of the fifth arc portion 35; or the radius R2 of the second arc portion 34 may be equal to the radius R3 of the fifth arc portion 35, but not equal to the radius R1 and R3 of the first arc portion 33; or the radius R1 of the first arc portion 33, the radius R2 of the second arc portion 34, and the radius R3 of the fifth arc portion 35 are not equal.

[0158] See also Figure 7 and Figure 9 , Figure 9 yes Figure 7 The schematic diagram of the partial structure of the foldable terminal 1000 in the first embodiment is shown. Figure 9 Only the display screen 200 , the axis C1 of the first arcuate portion 33 , the axis C2 of the second arcuate portion 34 , and the axis C3 of the fifth arcuate portion 35 are shown.

[0159] In this embodiment, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are all located within the display screen 200. Specifically, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are respectively located within different layers of the display screen 200. Specifically, the axis C1 of the first curved portion 33 is located within the third structural layer 260, the axis C2 of the second curved portion 34 is located within the second structural layer 250 and on the side of the axis C1 of the first curved portion 33 away from the second swing arm 40, and the axis C3 of the fifth curved portion 35 is located within the first structural layer 240 and on the side of the axis C2 of the second curved portion 34 away from the second swing arm 40.

[0160] In some other embodiments, the axis C1 of the first curved portion 33 may also be located in the fifth structural layer 280, the fourth structural layer 270, the second structural layer 250 or the first structural layer 240 of the display screen 200, or the axis C1 of the second curved portion 34 may also be located in the fifth structural layer 280, the fourth structural layer 270, the third structural layer 260 or the first structural layer 240 of the display screen 200, or the axis C3 of the fifth curved portion 35 may also be located in the fifth structural layer 280, the fourth structural layer 270, the third structural layer 260 or the second structural layer 250 of the display screen 200. This application does not make any specific limitations on this.

[0161] In this embodiment, the second swing arm 40 and the first swing arm 30 have substantially the same structure. The second rotating shaft portion 41 includes three arc-shaped portions distributed along the circumference of the second rotating shaft portion 41, and the three arc-shaped portions are connected in sequence. The three arc-shaped portions are respectively a third arc-shaped portion, a fourth arc-shaped portion, and a sixth arc-shaped portion (not shown). The third arc-shaped portion is located at the end of the second rotating shaft portion 41 away from the second swinging portion 42. The sixth arc-shaped portion is located at the end of the second rotating shaft portion 41 closer to the second swinging portion 42 and is fixedly connected to the second swinging portion 42. The fourth arc-shaped portion is connected between the third and sixth arc-shaped portions.

[0162] Specifically, the axis of the third arc portion is located in the first structural layer 240, the axis of the fourth arc portion is located in the second structural layer 250 and is located on the side of the axis of the third arc portion away from the first swing arm 30, and the axis of the sixth arc portion is located in the third structural layer 260 and is located on the side of the axis of the fourth arc portion away from the first swing arm 30. It should be noted that the structure of the third arc portion is substantially the same as that of the first arc portion 33, the structure of the fourth arc portion is substantially the same as that of the second arc portion 34, and the structure of the sixth arc portion is substantially the same as that of the fifth arc portion 35. Therefore, the specific structures of the third, fourth, and sixth arc portions can be referred to the descriptions of the first, second, and fifth arc portions 33, 34, and 35 above, respectively, and will not be repeated here.

[0163] In this embodiment, since the axis C1 of the first arc portion 33 is located in the first structural layer 240, the axis C2 of the second arc portion 34 is located in the second structural layer 250, and is located on the side of the axis C1 of the first arc portion 33 away from the second swing arm 40, the axis C3 of the fifth arc portion 35 is located in the third structural layer 260, and is located on the side of the axis C2 of the second arc portion 34 away from the second swing arm 40. During the folding process of the foldable terminal 1000, the tensile deformation of the first structural layer 240 and the second structural layer 250 can be reduced to match the tensile deformation of the third structural layer 260, thereby improving the matching degree among the first structural layer 240, the second structural layer 250 and the third structural layer 260. Therefore, the rotation process of the first swing arm 30 and the second swing arm 40 relative to the limiting base 20 can match the bending process of the display screen 200, which can reduce the pulling of the rotating mechanism 130 on the display screen 200, avoid the problem of wrinkles in the display screen 200 due to pulling, and ensure the reliability of the foldable terminal 1000.

[0164] See also Figure 7 and Figure 10 , Figure 10 yes Figure 7 The foldable terminal 1000 is a partial structural diagram of the second embodiment. Figure 10 Only the display screen 200 , the axis C1 of the first arcuate portion 33 , the axis C2 of the second arcuate portion 34 , and the axis C3 of the fifth arcuate portion 35 are shown.

[0165] The foldable terminal 1000 shown in this embodiment differs from the foldable terminal 1000 shown in the first embodiment described above in that the radius R1 of the first curved portion 33 is not equal to the radius R2 of the second curved portion 34, and the radius R2 of the second curved portion 34 is not equal to the radius R3 of the fifth curved portion 35. For example, the radius R1 of the first curved portion 33 is greater than the radius R2 of the second curved portion 34, and the radius R2 of the second curved portion 34 is greater than the radius R3 of the fifth curved portion 35.

[0166] The curvature of the first arc portion 33 is designed to be tangent to the curvature of the second arc portion 34, meaning that the difference between the radius R1 of the first arc portion 33 and the radius R2 of the second arc portion 34 is between 0.1 mm and 10 cm. The curvature of the second arc portion 34 is designed to be tangent to the curvature of the fifth arc portion 35, meaning that the difference between the radius R2 of the second arc portion 34 and the radius R3 of the fifth arc portion 35 is between 0.1 mm and 10 cm. The curvature of the second arc portion 34 is designed to be tangent to both the curvature of the first arc portion 33 and the curvature of the fifth arc portion 35. This reduces the magnitude of the curvature change when the first rotating shaft portion 31 rotates relative to the limiting base 20, while preventing the display screen 200 from being pulled, thereby ensuring smooth rotation of the first rotating shaft portion 31 relative to the limiting base 20.

[0167] In this embodiment, since the axis C1 of the first arc portion 33 is located in the first structural layer 240, the axis C2 of the second arc portion 34 is located in the second structural layer 250, and is located on the side of the axis C1 of the first arc portion 33 away from the second swing arm 40, the axis C3 of the fifth arc portion 35 is located in the third structural layer 260, and is located on the side of the axis C2 of the second arc portion 34 away from the second swing arm 40. During the folding process of the foldable terminal 1000, the tensile deformation of the first structural layer 240 and the second structural layer 250 can be reduced to match the tensile deformation of the third structural layer 260, thereby improving the matching degree among the first structural layer 240, the second structural layer 250 and the third structural layer 260. Therefore, the rotation process of the first swing arm 30 and the second swing arm 40 relative to the limiting base 20 can match the bending process of the display screen 200, which can reduce the pulling of the rotating mechanism 130 on the display screen 200, avoid the problem of wrinkles in the display screen 200 due to pulling, and ensure the reliability of the foldable terminal 1000.

[0168] See also Figure 7 and Figure 11 , Figure 11 yes Figure 7 The schematic diagram of the partial structure of the foldable terminal 1000 in the third embodiment is shown. Figure 11Only the display screen 200 , the axis C1 and radius R1 of the first arc portion 33 , the axis C2 and radius R2 of the second arc portion 34 , and the axis C3 and radius R3 of the fifth arc portion 35 are shown.

[0169] The foldable terminal 1000 shown in this embodiment is different from the foldable terminal 1000 shown in the first embodiment in that the axis C1 of the first arc portion 33 , the axis C2 of the second arc portion 34 and the axis C3 of the fifth arc portion 35 are located on the same layer of the display screen 200 .

[0170] In other embodiments, the axis C1 of the first curved portion 33 and the axis C2 of the second curved portion 34 may be located on the same layer of the display screen 200, but on a different layer from the axis C3 of the fifth curved portion 35. Alternatively, the axis C1 of the first curved portion 33 and the axis C3 of the fifth curved portion 35 may be located on the same layer of the display screen 200, but on a different layer from the axis C2 of the second curved portion 34. Alternatively, the axis C2 of the second curved portion 34 and the axis C3 of the fifth curved portion 35 may be located on the same layer of the display screen 200, but on a different layer from the axis C1 of the first curved portion 33. This is not specifically limited in the present application.

[0171] Specifically, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are all located within the neutral layer 200a of the display screen 200 and are spaced apart from each other. That is, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are all located within the third structural layer 260 of the display screen 200. The axis C2 of the second curved portion 34 is located between the axis C1 of the first curved portion 33 and the axis C3 of the fifth curved portion 35. In other embodiments, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 may all be located within the fifth structural layer 280, the fourth structural layer 270, the second structural layer 250, or the first structural layer 240 of the display screen 200.

[0172] In this embodiment, because the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are all located within the neutral layer 200a of the display screen 200 and are spaced apart from one another, during the folding process of the foldable terminal 1000, the rotation center of the first swing arm 30 relative to the limiting base 20 is located within the neutral layer 200a. This allows the rotation of the first swing arm 30 relative to the limiting base 20 to match the changes in the neutral layer 200a. Consequently, the rotation of the first swing arm 30 and the second swing arm 40 can match the bending process of the display screen 200, reducing the pulling of the rotating mechanism 130 on the display screen 200 and preventing wrinkles on the display screen 200 due to the pulling, thereby ensuring the reliability of the foldable terminal 1000.

[0173] See also Figure 7 and Figure 12 , Figure 12 yes Figure 7 The schematic diagram of the partial structure of the foldable terminal 1000 in the fourth embodiment is shown. Figure 12 Only the display screen 200 , the axis C1 and radius R1 of the first arc portion 33 , the axis C2 and radius R2 of the second arc portion 34 , and the axis C3 and radius R3 of the fifth arc portion 35 are shown.

[0174] The foldable terminal 1000 shown in this embodiment is different from the foldable terminal 1000 shown in the second embodiment in that the axis C1 of the first arc portion 33, the axis C2 of the second arc portion 34 and the axis C3 of the fifth arc portion 35 are all located at the same layer of the display screen 200 and coincide with each other.

[0175] In other embodiments, the axis C1 of the first arcuate portion 33 may coincide with the axis C2 of the second arcuate portion 34, but not coincide with the axis C3 of the fifth arcuate portion 35. Alternatively, the axis C1 of the first arcuate portion 33 may coincide with the axis C3 of the fifth arcuate portion 35, but not coincide with the axis C2 of the second arcuate portion 34. Alternatively, the axis C2 of the second arcuate portion 34 and the axis C1 of the first arcuate portion 33 may coincide with the axis C3 of the fifth arcuate portion 35, but not coincide with the axis C1 of the first arcuate portion 33. This is not specifically limited in the present application.

[0176] Specifically, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are all located within the neutral layer 200a of the display screen 200 and coincide with each other. That is, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are all located within the third structural layer 260. In other embodiments, the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 may all be located within the display screen 200, or within the first structural layer 240, the second structural layer 250, the fourth structural layer 270, or the fifth structural layer 280 of the display screen 200.

[0177] In this embodiment, because the axis C1 of the first curved portion 33, the axis C2 of the second curved portion 34, and the axis C3 of the fifth curved portion 35 are all located within the neutral layer 200a of the display screen 200 and are spaced apart from one another, during the folding process of the foldable terminal 1000, the rotation center of the first swing arm 30 relative to the limiting base 20 is located within the neutral layer 200a. This allows the rotation of the first swing arm 30 relative to the limiting base 20 to match the changes in the neutral layer 200a. Consequently, the rotation of the first swing arm 30 and the second swing arm 40 can match the bending process of the display screen 200, reducing the pulling of the rotating mechanism 130 on the display screen 200 and preventing wrinkles on the display screen 200 due to the pulling, thereby ensuring the reliability of the foldable terminal 1000.

[0178] It should be noted that in some other embodiments, the structure of the second swing arm 40 may differ from that of the first swing arm 30. For example, the first swing arm 30 may adopt the structure of the first swing arm 30 described in the first embodiment, while the second swing arm 40 may adopt the structure of the first swing arm 30 described in the second, third, or fourth embodiment. Alternatively, the second swing arm 40 may not adopt the structure of the first swing arm 30 described in any of the above embodiments. During the folding process of the foldable terminal 1000, the rotating mechanism 130 can also reduce the pulling on the display screen 200, thereby preventing the display screen 200 from wrinkling due to the pulling, thereby ensuring the reliability of the foldable terminal 1000.

[0179] The above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application; the embodiments of this application and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A rotating mechanism, characterized in that: The rotating mechanism includes a limiting base, a first swing arm and a second swing arm, and the limiting base is provided with a first arc-shaped groove and a second arc-shaped groove; The first swing arm includes a first rotating shaft portion, which is slidably mounted in the first arc-shaped slot and can rotate relative to the limit base. The second swing arm includes a second rotating shaft portion, which is slidably mounted in the second arc-shaped slot and can rotate relative to the limit base. The first rotating shaft portion and the second rotating shaft portion rotate in opposite directions relative to the limit base. In which, the first rotating shaft portion includes a first arc portion and a second arc portion distributed along the circumference of the first rotating shaft portion, the first arc portion and the second arc portion are fixedly connected, the axis center of the first arc portion and the axis center of the second arc portion are spaced apart, and / or the radius of the first arc portion is different from the radius of the second arc portion.

2. The rotation mechanism according to claim 1, characterized in that: When the radius of the first arc-shaped portion is different from the radius of the second arc-shaped portion, the difference between the radius of the first arc-shaped portion and the radius of the second arc-shaped portion is between 0.1 mm and 10 cm.

3. The rotating mechanism according to claim 1 or 2, characterized in that: The second rotating shaft portion includes a third arc portion and a fourth arc portion distributed along the circumference of the second rotating shaft portion, the third arc portion is fixedly connected to the fourth arc portion, the axis of the third arc portion and the axis of the fourth arc portion are spaced apart, and / or the radius of the third arc portion is different from the radius of the fourth arc portion.

4. The rotation mechanism according to claim 3, characterized in that: When the radius of the third arc-shaped portion is different from the radius of the fourth arc-shaped portion, the difference between the radius of the third arc-shaped portion and the radius of the fourth arc-shaped portion is between 0.1 mm and 10 cm.

5. The rotating mechanism according to claim 3 or 4, characterized in that: The first rotating shaft portion further includes a fifth arcuate portion distributed along the circumference of the first rotating shaft portion, the fifth arcuate portion being fixedly connected to an end of the second arcuate portion away from the first arcuate portion, the axis of the fifth arcuate portion being spaced apart from the axis of the second arcuate portion, and / or the radius of the fifth arcuate portion being different from the radius of the second arcuate portion; The second rotating shaft portion also includes a sixth arc portion distributed along the circumference of the second rotating shaft portion, the sixth arc portion is fixedly connected to the fourth arc portion, the axis of the sixth arc portion is spaced apart from the axis of the fourth arc portion, and / or the radius of the sixth arc portion is different from the radius of the fourth arc portion.

6. The rotating mechanism according to claim 5, characterized in that: When the radius of the fifth arc-shaped portion is different from the radius of the second arc-shaped portion, the difference between the radius of the fifth arc-shaped portion and the radius of the second arc-shaped portion is between 0.1 mm and 10 cm; When the radius of the sixth arc-shaped portion is different from the radius of the fourth arc-shaped portion, the difference between the radius of the sixth arc-shaped portion and the radius of the fourth arc-shaped portion is between 0.1 mm and 10 cm.

7. The rotating mechanism according to any one of claims 1 to 6, characterized in that: The first swing arm further includes a first swing portion fixedly connected to the first rotating shaft portion, and the first swing portion extends relative to the first arc-shaped slot; The second swing arm further includes a second swing portion fixedly connected to the second rotating shaft portion, and the second swing portion extends relative to the second arc-shaped slot.

8. The rotating mechanism according to any one of claims 1 to 7, characterized in that: The limiting base includes a lower limiting block and an upper limiting block. The upper limiting block is installed on the lower limiting block and is enclosed with the lower limiting block to form the first arc groove and the second arc groove.

9. An electronic device, characterized in that: It comprises a first shell, a second shell, a display screen and a rotating mechanism as described in any one of claims 1 to 8, wherein the first swing arm is fixedly connected to the first shell, the second swing arm is fixedly connected to the second shell, and the display screen is installed on the first shell and the second shell.

10. The electronic device according to claim 9, characterized in that The display screen includes a first display part, a second display part and a bendable part, the bendable part is connected between the first display part and the second display part, the first display part is installed on the first shell, the second display part is installed on the second shell, and the bendable part is arranged opposite to the rotating mechanism.

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