CN221443069U - Rotating shaft mechanism and foldable electronic device - Google Patents

Abstract

The present application relates to the technical field of foldable electronic devices, and provides a hinge mechanism and a foldable electronic device, which can solve the problem in the related art that the display screen of the foldable electronic device is easily pulled and lifted during the folding and unfolding process. The hinge mechanism includes a base, and a pair of swing arm assemblies respectively connected to opposite sides of the base; the swing arm assembly includes a first swing arm, a second swing arm, a transmission component and a connecting member, the first swing arm and the second swing arm are both rotatably connected to the base, and the first swing arm is slidably connected to the second swing arm; the transmission component is arranged on the second swing arm and is respectively connected to the first swing arm and the connecting member; when the swing arm assembly rotates from the unfolded position to the folded position, the first swing arm slides relative to the second swing arm along the first direction, so that the transmission component rotates to drive the connecting member to move closer to the base; the first direction is a direction away from the base or a direction close to the base. The present application can be used on electronic devices such as mobile phones.

Description

Rotating shaft mechanism and foldable electronic device

Technical Field

The present application relates to the technical field of foldable electronic devices, and in particular to a hinge mechanism and a foldable electronic device.

Background technique

Foldable electronic devices such as foldable mobile phones and foldable tablets are becoming more and more popular among users because of their large display area when flattened and small size when folded. There are two types of foldable electronic devices: one is the inner folding type, that is, when folded, the display screen is located on the inside of the foldable electronic device; the other is the outer folding type, that is, when folded, the display screen is located on the outside of the foldable electronic device. Outer folding foldable electronic devices are becoming more and more widely used because of their thin thickness and light weight.

A foldable electronic device of the related art includes a display screen, two housings, and a hinge mechanism, wherein the housing is used to support the display screen, and the hinge mechanism is disposed at the position where the two housings are connected, and is respectively connected to the two housings, so that the two housings can switch between an unfolded state and a folded state. However, when the two housings of the foldable electronic device switch between the unfolded state and the folded state, the display screen is easily arched and pulled by the housing, thereby affecting the normal operation of the display screen.

Utility Model Content

The embodiments of the present application provide a hinge mechanism and a foldable electronic device, which are used to solve the problem in the related art that the display screen of the foldable electronic device is easily pulled and arched during the folding and unfolding process.

To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

In a first aspect, an embodiment of the present application provides a hinge mechanism for a foldable electronic device, comprising a base, and a pair of swing arm assemblies respectively connected to opposite sides of the base, the swing arm assembly can rotate relative to the base between a folded position and an unfolded position, and when the swing arm assembly is in the folded position, a support surface of the swing arm assembly is located on the outside of the swing arm assembly, and the support surface is used to support the display screen of the foldable electronic device; the swing arm assembly comprises a first swing arm, a second swing arm, a transmission component, and a connector for connecting the shell of the foldable electronic device, the first swing arm and the second swing arm are both rotatably connected to the base, and the first swing arm and the second swing arm are rotatably connected to the base. The swing arm is slidably connected; the transmission component is rotatably arranged on the second swing arm, and the transmission component is connected between the first swing arm and the connecting member; when the swing arm assembly rotates from the unfolded position to the folded position, the first swing arm slides relative to the second swing arm along a first direction, so that the transmission component rotates relative to the second swing arm to drive the connecting member to move closer to the base; the first direction is a direction away from the base or a direction close to the base; when the swing arm assembly rotates from the folded position to the unfolded position, the first swing arm slides relative to the second swing arm along a second direction, so that the transmission component rotates relative to the second swing arm to drive the connecting member to move away from the base, and the second direction is opposite to the first direction.

In the embodiment of the present application, the rotating shaft mechanism is provided with a transmission component, and the transmission component can be rotatably provided on the second swing arm and connected between the first swing arm and the connecting member. In this way, when the swing arm assembly rotates from the deployed position to the folded position, the first swing arm slides relative to the second swing arm along the first direction, so that the transmission component rotates relative to the second swing arm to drive the connecting member to move closer to the base, and then the connecting member drives the shell to move closer to the base, which can avoid the shell from pulling the display screen, thereby avoiding damage to the display screen due to pulling; when the swing arm assembly rotates from the folded position to the deployed position, the first swing arm slides relative to the second swing arm along the second direction, so that the transmission component rotates relative to the second swing arm to drive the connecting member to move away from the base, and then the connecting member drives the shell to move away from the base, which can tension the display screen to prevent the display screen from arching due to relaxation, thereby affecting the display effect of the display screen. By adjusting the distance between the shell and the base through the transmission component, the distance between the ends of the two shells can be adjusted to well adapt to the changes in the lengths of the first area and the second area of the display screen when the display screen is folded and unfolded, thereby achieving constant length control of the display screen during the unfolding and folding process, avoiding the display screen from being pulled and arched, and ensuring the normal operation of the display screen.

In some embodiments, the transmission component includes a rotating member, which is rotatably connected to the second swing arm through a first rotating shaft, and the rotating member has a first connecting portion and a second connecting portion arranged along the circumference of the first rotating shaft, the first connecting portion is connected to the first swing arm, and the second connecting portion is connected to the connecting member; when the first swing arm slides relative to the second swing arm along the first direction, the first swing arm drives the rotating member to rotate relative to the second swing arm along the first turning direction, so that the second connecting portion drives the connecting member to move closer to the base; when the first swing arm slides relative to the second swing arm along the second direction, the first swing arm drives the rotating member to rotate relative to the second swing arm along the second turning direction, so that the second connecting portion drives the connecting member to move away from the base; the second turning direction is opposite to the first turning direction. Such a configuration can simplify the structure of the transmission component, thereby facilitating the improvement of the working reliability of the rotating member.

In some embodiments, the first connection portion and the second connection portion are respectively located on opposite sides of the first rotating shaft. This arrangement can make the structure of the rotating member more compact, and the rotating member occupies less space when rotating.

In some embodiments, the distance between the first connection portion and the central axis of the first rotating shaft is smaller than the distance between the second connection portion and the central axis of the first rotating shaft. In this way, the rotating member can amplify the smaller movement distance between the first swing arm and the second swing arm, which can well meet the requirement of constant length control of the display screen during folding and unfolding.

In some embodiments, the first connecting part and the second connecting part each include a plurality of teeth arranged along the circumference of the first rotating shaft, a first rack is fixed on the first swing arm, and a second rack is fixed on the connecting member; the first rack and the second rack both extend in a direction parallel to the first direction; the first rack meshes with the first connecting part, and the second rack meshes with the second connecting part. This arrangement can make the connection between the rotating member and the first swing arm and the connecting member more secure.

In some embodiments, the second swing arm is slidably connected to the first swing arm through a first sliding structure; the first sliding structure includes a first slide groove and a first limiting structure, the first slide groove is arranged on the first swing arm and extends in a direction parallel to the first direction; the second swing arm includes a swing arm section rotatably connected to the base, and a sliding arm section rotatably connected to the swing arm section, and both the swing arm section and the sliding arm section are slidably matched with the first slide groove; the first limiting structure is used to prevent the sliding arm section from moving relative to the first slide groove along the groove depth direction of the first slide groove. With such a configuration, the second swing arm can be better confined in the first slide groove, reducing the space occupied by the second swing arm outside the first swing arm.

In some embodiments, the first limiting structure includes a first limiting groove and a first protrusion, the first limiting groove is arranged on one of the groove sidewall and the sliding arm section of the first sliding groove, and the first protrusion is arranged on the groove sidewall and the sliding arm section of the first sliding groove; the first limiting groove extends in a direction parallel to the first direction, the first limiting groove has two first groove walls arranged along the groove depth direction of the first sliding groove, and the first protrusion is slidably arranged between the two first groove walls. Such an arrangement can make the first limiting structure simpler, thereby helping to reduce the design and manufacturing costs of the rotating shaft mechanism.

In some embodiments, the first swing arm has a stopper, the slide arm section has an abutment section, the stopper section is located on a side of the abutment section close to the base, and when the swing arm assembly is in the folded position, the abutment section stops at the position of the stopper section. With this arrangement, the rotation angle of the swing arm assembly when it rotates to the folded position can be well controlled, thereby avoiding the extrusion damage to the base caused by the slide arm section when the swing arm assembly rotates at an excessively large angle.

In some embodiments, the first swing arm includes two swing parts, the two swing parts are arranged in a spaced relationship along the length direction of the base, the first slide groove is located between the two swing parts, and the stopper connects the two swing parts; a transmission component is provided on one side of the slide arm section, a boss is provided on the other side of the slide arm section, the boss is an abutment part, and the stopper and the abutment part are located on the same side of the slide arm section. In this way, the abutment part and the stopper can be located outside the motion range of the transmission component, thereby avoiding motion interference between the transmission component and the abutment part and the stopper.

In some embodiments, the second swing arms of the pair of swing arm assemblies are connected by an even number of gear transmissions, so that the pair of swing arm assemblies rotate synchronously relative to the base between the folded position and the unfolded position. In this way, the swing arm assemblies can rotate synchronously relative to the base.

In some embodiments, the connecting member is slidably connected to the first swing arm, and a damping device is provided on the connecting member, the damping device includes an elastic component and an abutment joint connected to the elastic component, and the elastic component is used to apply an elastic force to the abutment joint so that the abutment joint abuts against the first swing arm; when the connecting member slides relative to the first swing arm in a direction parallel to the first direction under the drive of the transmission component, the abutment joint rubs against the first swing arm to apply a damping force to the connecting member. In this way, the movement of the housing driven by the connecting member can be smoother during the rotation of the swing arm assembly relative to the base.

In some embodiments, the first swing arm includes a near end surface arranged near the base, a far end surface arranged far from the base, and a swing arm side surface connected between the near end surface and the far end surface, the swing arm side surface is used to abut against the abutment, and a first guiding inclined surface is arranged between the swing arm side surface and the far end surface, and the first guiding inclined surface is arranged obliquely relative to the swing arm side surface; when the swing arm assembly is in the unfolded position, the abutment abuts against the first guiding inclined surface. In this way, the first guiding inclined surface can guide the abutment, so that the abutment can slide along the first guiding inclined surface to the swing arm side surface, thereby making the relative movement between the abutment and the first swing arm smoother.

In some embodiments, the abutment head is provided with a second guiding slope, which is inclined relative to the side of the swing arm, and when the swing arm assembly is in the unfolded position, the second guiding slope abuts against the first guiding slope. In this way, the abutment head is provided with the second guiding surface, so that the abutment head moves along the first guiding slope more smoothly.

In some embodiments, the connecting member has a first accommodating space, a second accommodating space, and a connecting hole connecting the first accommodating space and the second accommodating space. The first accommodating space and the second accommodating space are arranged along the length direction of the base. The first swing arm extends into the first accommodating space, the elastic component is arranged in the second accommodating space, and the abutment head extends into the first accommodating space through the connecting hole and abuts against the first swing arm.

In some embodiments, the connecting member is slidably connected to the first swing arm through a second sliding structure; the second sliding structure includes a second slide groove, a sliding matching portion and a second limiting structure, the second slide groove is arranged on one of the first swing arm and the connecting member, the sliding matching portion is arranged on the other of the first swing arm and the connecting member, the second slide groove extends in a direction parallel to the first direction, and the sliding matching portion is slidably matched with the second slide groove; the second limiting structure is used to prevent the sliding matching portion from moving relative to the second slide groove along the groove depth direction of the second slide groove. Such a configuration can make the connecting member relatively stable in the process of moving close to and away from the base.

In some embodiments, the second limiting structure includes a second limiting groove and a second protrusion, the second limiting groove is arranged on one of the groove side wall and the sliding matching part of the second slide groove, and the second protrusion is arranged on the other of the groove side wall and the sliding matching part of the second slide groove; the second limiting groove extends in a direction parallel to the first direction, the second limiting groove has two second groove walls arranged along the groove depth direction of the second slide groove, and the second protrusion is slidingly matched and arranged between the two second groove walls. Such an arrangement can make the second limiting structure simpler, thereby helping to reduce the design and manufacturing costs of the rotating shaft mechanism.

In some embodiments, the swing arm assembly further comprises a support member, the support member is rotatably connected to the base and is also slidably connected to the connecting member, the support member has a first arc-shaped supporting surface, the connecting member has a second supporting surface, and the second supporting surface and the first supporting surface constitute a supporting surface of the swing arm assembly. This arrangement can prevent the first area of the display screen from being concave, so that the display screen can be more easily kept in a flat state.

In some embodiments, the connecting member includes a cover plate and a sub-connecting member detachably connected to the cover plate, the second supporting surface is located on the cover plate, the sub-connecting member is connected to the transmission component, and the sub-connecting member, the first swing arm, the second swing arm and the transmission component are all located on a side of the cover plate away from the second supporting surface. This arrangement can facilitate the maintenance and replacement of components such as the first swing arm, the second swing arm and the transmission component.

In some embodiments, the swing arm assembly further comprises a shielding member, which is located at the back of the first swing arm, the second swing arm and the connecting member, and the shielding member is fixedly connected to the first swing arm. In this way, the shielding member can protect the first swing arm, the second swing arm and the connecting member on the inner side.

In some embodiments, the connecting member is slidably connected to the shielding member through a third sliding structure; the third sliding structure includes a third sliding groove and a third protrusion, the third sliding groove is arranged on one of the connecting member and the shielding member, the third protrusion is arranged on the other of the connecting member and the shielding member, the third sliding groove extends in a direction parallel to the first direction, and the third protrusion is slidably matched with the third sliding groove. Such an arrangement can further reduce the shaking of the connecting member in the process of approaching or moving away from the base, so that the connecting member can move more smoothly in the process of approaching and moving away from the base.

In a second aspect, an embodiment of the present application provides a foldable electronic device, comprising a display screen, at least two shells, and the hinge mechanism of the first aspect, wherein the shell is used to support the display screen, the hinge mechanism is located at the junction of two adjacent shells, and a pair of swing arm assemblies of the hinge mechanism are respectively connected to the corresponding shells.

The beneficial effects of the electronic device in the embodiment of the present application are the same as the beneficial effects of the hinge mechanism in the first aspect, and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a foldable electronic device in the related art in an unfolded state;

FIG2 is a schematic structural diagram of the foldable electronic device shown in FIG1 in a folded state;

FIG3 is a schematic diagram of the structure of a foldable electronic device (mobile phone) in an unfolded state in some embodiments of the present application;

FIG4 is a schematic structural diagram of the foldable electronic device in FIG3 in a folded state;

FIG5 is an exploded view of the foldable electronic device in FIG3 ;

FIG6 is a top view of the foldable electronic device in an embodiment of the present application after the display screen is removed;

FIG7 is an exploded view of the hinge mechanism and the housing of the foldable electronic device in FIG6 ;

FIG8 a is a schematic diagram of a foldable electronic device (mobile phone) in an unfolded state in the first embodiment of the present application;

FIG8b is a schematic diagram of the foldable electronic device (mobile phone) in the folded state in the first embodiment of the present application;

FIG9a is a schematic diagram of a foldable electronic device (mobile phone) in an unfolded state in the second embodiment of the present application;

FIG9 b is a schematic diagram of a foldable electronic device (mobile phone) in a folded state in the second embodiment of the present application;

FIG10 a is a schematic diagram of a foldable electronic device (mobile phone) in an unfolded state in the third embodiment of the present application;

FIG10 b is a schematic diagram of a foldable electronic device (mobile phone) in a folded state in the third embodiment of the present application;

FIG11a is a schematic diagram of a foldable electronic device (mobile phone) in an unfolded state in a fourth embodiment of the present application;

FIG11b is a schematic diagram of a foldable electronic device (mobile phone) in a folded state in the fourth embodiment of the present application;

FIG12 is a schematic structural diagram of a rotating shaft mechanism in a fourth embodiment of the present application;

FIG13 is an exploded view of the rotating shaft mechanism in FIG12 after the shielding member is removed;

FIG14 is a partial view of the rotating shaft mechanism in FIG12 with the cover plate of one side connecting member removed;

FIG15 is a top view of the rotating shaft mechanism in FIG14;

FIG16 is a partial view of the rotating shaft mechanism in FIG12 after removing the support members on both sides and the cover plate of the connecting member;

FIG17 is a top view of the rotating shaft mechanism of FIG16 with the shielding member removed;

FIG18 is a C-C cross-sectional view of the rotating shaft mechanism of FIG15 after the cover plate of the lower connecting member is installed;

Fig. 19 is a cross-sectional view of the rotating shaft mechanism taken along line F-F in Fig. 17;

Fig. 20 is a cross-sectional view of the rotating shaft mechanism taken along line E-E in Fig. 17;

FIG21 is a front view of an assembly formed by the first swing arm, the second swing arm and the base in the fourth embodiment of the present application;

FIG22 is a rear view of an assembly formed by the first swing arm, the second swing arm and the base in the fourth embodiment of the present application;

FIG23 is a diagram showing the connection relationship between the first swing arm and the second swing arm in the fourth embodiment of the present application;

FIG24 is a schematic structural diagram of a second swing arm in a fourth embodiment of the present application;

FIG25 is a cross-sectional view taken along line A-A of the rotating shaft mechanism in FIG15 after the connector located at the lower side is installed with a cover plate;

FIG26 is a B-B cross-sectional view of the rotating shaft mechanism in FIG15 after the connecting member located at the lower side is installed with a cover plate;

FIG27 is a schematic structural diagram of the back side of the connecting member of the rotating shaft mechanism in FIG12;

FIG28 is an exploded view of the connector shown in FIG27 ;

FIG29 is a partial enlarged view of FIG28;

FIG30 is a bottom view of the rotating shaft mechanism shown in FIG12;

FIG31 is a partial view of the rotating shaft mechanism in FIG30 with the shielding member on one side removed;

FIG32 is a partial view of the rotating shaft mechanism in FIG30 with shielding members on both sides removed;

Figure 33 is a D-D cross-sectional view of the rotating shaft mechanism in Figure 25.

Detailed ways

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

FIG1 is a schematic diagram of the structure of a foldable electronic device in the related art in the unfolded state, and FIG2 is a schematic diagram of the structure of the foldable electronic device shown in FIG1 in the folded state. As shown in FIG1 and FIG2, the foldable electronic device is an outward-folding foldable electronic device, and includes a display screen 01, two shells 02, and a hinge mechanism 03, the shell 02 has a support surface 021, the support surface 021 is used to support the display screen 01, and the hinge mechanism 03 is arranged at the position where the two shells 02 are connected, and is respectively connected to the two shells 02, so that the two shells 02 can switch between the unfolded state (as shown in FIG1) and the folded state (as shown in FIG2).

The display screen 01 is a flexible display screen, and includes a first area 011 covering the hinge mechanism 03 , and a second area 012 covering the support surface 021 of the housing 02 .

The rotating shaft mechanism 03 includes a base 031 and a pair of swing arm assemblies 032 respectively connected to opposite sides of the base 031, and the pair of swing arm assemblies 032 are respectively connected to two shells 02 in a one-to-one correspondence. The swing arm assembly 032 includes a swing arm 033 and a connecting member 034, the swing arm 033 is rotatably connected to the base 031, and the connecting member 034 is connected to both the swing arm 033 and the shell 02.

The swing arm assembly 032 can rotate between a folded position and an unfolded position relative to the base 031. As shown in FIG1 , when the swing arm assembly 032 is in the unfolded position, the two shells 02 are in the unfolded state, and the display screen 01 is unfolded; as shown in FIG2 , when the swing arm assembly 032 is in the folded position, the two shells 02 are in the folded state, and the display screen 01 is folded.

In the foldable electronic device of the related art, the first area 011 of the display screen 01 will gradually bend during the folding process. Since the display screen 01 is located on the outside of the shell 02, during the bending process, the length of the first area 011 of the display screen 01 is greater than the length of the first area 011 when unfolded, thereby reducing the length of the second area 012 of the support surface 021 covering the shell 02. At this time, in order to match the length of the second area 012 with the length of the support surface 021, the shell 02 will pull the display screen 01, and the display screen 01 is easily deformed and damaged under the pulling. When the display screen 01 is unfolded, the pulled display screen 01 is easy to relax, which is easy to cause the display screen 01 to bulge, thereby affecting the display effect of the display screen 01.

It can be seen that the hinge mechanism 03 of the foldable electronic device in the related art cannot adapt well to the change in the length of the first area 011 and the second area 012 during the folding and unfolding of the display screen 01, which can easily cause the display screen 01 to be pulled and arched, thereby affecting the normal operation of the display screen 01.

To this end, an embodiment of the present application provides a hinge mechanism and a foldable electronic device, wherein a transmission component is arranged between the swing arm and the connecting member of the hinge mechanism, so that when the swing arm assembly rotates from the unfolded position to the folded position, the swing arm drives the connecting member to approach the base through the transmission component, and then the connecting member drives the shell to approach the base; when the swing arm assembly rotates from the folded position to the unfolded position, the swing arm drives the connecting member away from the base through the transmission component, and then the connecting member drives the shell away from the base, so that the hinge mechanism can adapt to the changes in the length of the first area and the second area of the display screen during the folding and unfolding process, so as to avoid the display screen from being pulled and arched.

The foldable electronic device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The following takes a mobile phone as an example to illustrate the specific structure of the rotating shaft mechanism in the foldable electronic device. Other foldable electronic devices can be specifically set with reference to the rotating shaft mechanism in the mobile phone embodiment, and will not be described one by one here.

Figure 3 is a structural schematic diagram of a foldable electronic device (mobile phone) in some embodiments of the present application in an unfolded state, Figure 4 is a structural schematic diagram of the foldable electronic device in Figure 3 in a folded state, Figure 5 is an exploded view of the foldable electronic device in Figure 3, Figure 6 is a top view of the foldable electronic device in an embodiment of the present application after the display screen is removed, Figure 7 is a disassembled view of the hinge mechanism 100 and the shell 300 of the foldable electronic device in Figure 6, Figure 8a is a schematic diagram of the foldable electronic device (mobile phone) in the first embodiment of the present application in an unfolded state, and Figure 8b is a schematic diagram of the foldable electronic device (mobile phone) in the first embodiment of the present application in a folded state.

As shown in Figures 3, 4 and 5, the foldable electronic device in the embodiment of the present application includes a display screen 200, two shells 300 and a hinge mechanism 100. The shell 300 is used to support the display screen 200. The hinge mechanism 100 is arranged at the junction of the two shells 300 so that the two shells 300 can switch between an unfolded state (as shown in Figure 4) and a folded state (as shown in Figure 3).

The display screen 200 itself is bendable and can be bent and deformed when subjected to external force. As shown in FIG. 3 and FIG. 5 , when the two shells 300 are in the unfolded state, the display screen 200 is unfolded, and the display area of the display screen 200 is exposed to display image information to the user. The display screen 200 includes a first area 210, and two second areas 220 located on opposite sides of the first area 210. The first area 210 covers the hinge mechanism 100, and the second area 220 covers the display screen support surface 310 of the shell 300.

Among them, the display screen 200 can be a completely flexible screen structure, for example, the first area 210 and the second area 220 of the display screen 200 are both flexible screen structures; of course, the display screen 200 can also have a flexible screen structure in the middle folding part and a hard screen structure on both sides, for example, the first area 210 of the display screen 200 is a flexible screen structure, and the second area 220 is a hard screen structure.

As shown in Figure 4, when the two shells 300 are in a folded state, the two shells 300 are stacked, and the display screen 200 is located on the outside of the shell 300. At this time, the cross-sectional shape of the first area 210 of the display screen 200 is an inverted U shape, and the two second areas 220 of the display screen 200 are parallel or approximately parallel (for example, the deviation is within 10°).

Of course, the foldable electronic device in the embodiment of the present application is not limited to having two shells 300, but may also have more than two shells 300, such as three shells 300, etc. Two adjacent shells 300 can be switched between the unfolded state and the folded state, and the hinge mechanism 100 is arranged at the junction of two adjacent shells 300.

As shown in FIG. 5 , FIG. 8 a and FIG. 8 b , the rotating shaft mechanism 100 includes a base 1 and a pair of swing arm assemblies 2 .

The base 1 includes a base body 11 and a shaft cover 12 detachably disposed on the back side of the base body 11 (i.e., the side away from the display screen 200). The shaft cover 12 can be detachably connected to the base body 11 by fasteners (such as screws), but is not limited thereto. The shaft cover 12 can also be detachably connected to the base body 11 by means of snap connection, plug connection, etc. Of course, the structure of the above-mentioned base 1 is not limited to including the base body 11 and the shaft cover 12, and other structures can also be set according to actual conditions.

The shaft cover 12 includes a shaft cover bottom wall 121 and a shaft cover side wall 122 disposed at the edge of the shaft cover bottom wall 121. Of course, it is not limited thereto, and the shaft cover 12 may also adopt other structures according to actual conditions.

As shown in Figures 8a and 8b, a pair of swing arm assemblies 2 are respectively connected to opposite sides of the base 1, and a pair of swing arm assemblies 2 are respectively connected to corresponding shells 300. For example, as shown in Figure 8a, the swing arm assembly 2 connected to the left side of the base 1 is connected to the shell 300 located on the left side, and the swing arm assembly 2 connected to the right side of the base 1 is connected to the shell 300 located on the right side.

Specifically, a pair of swing arm assemblies 2 are connected to opposite sides of the base 1, respectively, which means that a pair of swing arm assemblies 2 are connected to opposite sides of the base 1, respectively. For example, as shown in FIG8a and FIG8b, one swing arm assembly 2 is connected to the left side of the base 1, and the other swing arm assembly 2 is connected to the right side of the base 1. In some embodiments, as shown in FIG6 and FIG8a, a pair of swing arm assemblies 2 are symmetrically distributed on both sides of the mid-plane 10 of the base 1 along the width direction X thereof.

As shown in Figures 8a and 8b, the swing arm assembly 2 can rotate relative to the base 1 between a folded position (as shown in Figure 8b) and an unfolded position (as shown in Figure 8a), and as shown in Figure 8b, when the swing arm assembly 2 is in the folded position, the support surface of the swing arm assembly 2 is located on the outside of the swing arm assembly 2, and the support surface is used to support the display screen 200 of the foldable electronic device. The support surface includes a first support surface 80 and a second support surface 61 (which will be described in detail later).

As shown in Figure 8a, the swing arm assembly 2 includes a first swing arm 3, a second swing arm 4, a transmission component 5 and a connecting member 6 for connecting the shell 300. The first swing arm 3 and the second swing arm 4 are both rotatably connected to the base 1, and the first swing arm 3 is slidingly connected to the second swing arm 4; the transmission component 5 is rotatably arranged on the second swing arm 4, and the transmission component 5 is connected between the first swing arm 3 and the connecting member 6.

As shown in Fig. 6 and Fig. 7, the connecting member 6 is connected to the housing 300 through a connecting structure, which includes a connecting strip 320 fixed to the housing 300 and a connecting groove 68 provided on the connecting member 6, wherein the connecting strip 320 extends into the connecting groove 68 and is fixedly connected to the groove wall of the connecting groove 68. In this way, the connecting groove 68 limits the connecting strip 320, which can reduce the shaking of the connecting strip 320, thereby making the connection between the connecting member 6 and the housing 300 more secure.

As shown in Figures 6 and 7, the connecting strip 320 is fixedly connected to the groove wall of the connecting groove 68 by fasteners (such as screws), but is not limited to this. The connecting strip 320 can also be fixedly connected to the groove wall of the connecting groove 68 by snapping, bonding, etc.

Among them, one or more connecting bars 320 may be provided, as shown in FIG6 and FIG7 , a plurality of connecting bars 320 (four connecting bars 320 are shown in the figure) are arranged along the length direction Y of the base 1. One or more connecting grooves 68 may be provided, and the specific number of the connecting grooves 68 corresponds to the number of the connecting bars 320.

The positions of the connection strip 320 and the connection groove 68 may also be interchanged: that is, the connection strip 320 is fixed on the connection member 6 , and the connection groove 68 is disposed on the housing 300 .

As shown in Fig. 8a and Fig. 8b, the rotation center axis O1 of the first swing arm 3 is offset from the rotation center axis O2 of the second swing arm 4, that is, the rotation center axis O1 of the first swing arm 3 is not colinear with the rotation center axis O2 of the second swing arm 4. With such arrangement, when the swing arm assembly 2 rotates relatively between the folded position and the unfolded position, the first swing arm 3 can slide relative to the second swing arm 4 in a direction approaching or moving away from the base 1.

In some embodiments, as shown in FIG8a and FIG8b, the first swing arm 3 and the second swing arm 4 are both rotatably connected to the base body 11, and along the height direction H of the base 1, the distance from the rotation center axis O1 of the first swing arm 3 to the shaft cover 12 is greater than the distance from the rotation center axis O2 of the second swing arm 4 to the shaft cover 12. The height direction H of the base 1 is perpendicular to the width direction X of the base 1 and the length direction Y of the base 1. Among them, as shown in FIG8a and FIG8b, the distance from the rotation center axis O1, the rotation center axis O2 to the shaft cover 12 specifically refers to the distance from the rotation center axis O1, the rotation center axis O2 to the shaft cover bottom wall 121.

By making the distance between the rotation center axis O1 of the first swing arm 3 and the shaft cover 12 greater than the distance between the rotation center axis O2 of the second swing arm 4 and the shaft cover 12, when the swing arm assembly 2 rotates, relative sliding will occur between the first swing arm 3 and the second swing arm 4. Specifically:

As shown in Figure 8a, when the swing arm assembly 2 rotates from the unfolded position to the folded position (that is, the swing arm assembly 2 rotates along the direction of R01 in the figure), the first swing arm 3 slides relative to the second swing arm 4 along the first direction M1, so that the transmission component 5 rotates relative to the second swing arm 4 to drive the connecting member 6 to move closer to the base 1, and then the connecting member 6 drives the shell 300 to move closer to the base 1; wherein the first direction M1 is the direction close to the base 1.

As shown in Figure 8b, when the swing arm assembly 2 rotates from the folded position to the unfolded position (that is, the swing arm assembly 2 rotates along the direction of R02 in the figure), the first swing arm 3 slides relative to the second swing arm 4 along the second direction M2, so that the transmission component 5 rotates relative to the second swing arm 4 to drive the connecting member 6 to move away from the base 1, and then the connecting member 6 drives the shell 300 away from the base 1, wherein the second direction M2 is opposite to the first direction M1, that is, the second direction M2 is the direction away from the base 1.

As shown in Figures 8a and 8b, since the movement is relative, the sliding of the first swing arm 3 relative to the second swing arm 4 along the first direction M1 can also be understood as: the second swing arm 4 slides relative to the first swing arm 3 along the second direction M2; the sliding of the first swing arm 3 relative to the second swing arm 4 along the second direction M2 can also be understood as: the second swing arm 4 slides relative to the first swing arm 3 along the first direction M1.

Of course, the positions of the rotation center axis O1 and the rotation center axis O2 are not limited to the above settings. The rotation center axis O1 and the rotation center axis O2 can also be staggered in the width direction X of the base 1. Specifically: the distances from the rotation center axis O1 and the rotation center axis O2 to the shaft cover 12 are equal, and the distance from the rotation center axis O1 to the mid-plane 10 is smaller than the distance from the rotation center axis O2 to the mid-plane 10.

In the embodiment of the present application, the rotating shaft mechanism 100 is provided with a transmission component 5, and the transmission component 5 can be rotatably provided on the second swing arm 4 and connected between the first swing arm 3 and the connecting member 6. In this way, when the swing arm assembly 2 rotates from the unfolded position to the folded position, the first swing arm 3 slides relative to the second swing arm 4 along the first direction M1, so that the transmission component 5 rotates relative to the second swing arm 4 to drive the connecting member 6 to move closer to the base, so that the connecting member 6 drives the shell 300 to move closer to the base 1, so that the shell 300 can be prevented from pulling the display screen 200, thereby preventing the display screen 200 from being damaged due to pulling; when the swing arm assembly 2 rotates from the folded position to the unfolded position, the first swing arm 3 slides relative to the second swing arm 4 along the second direction M2, so that the transmission component 5 rotates relative to the second swing arm 4 to drive the connecting member 6 to move away from the base 1, so that the connecting member 6 drives the shell 300 to move away from the base 1, so that the display screen 200 can be tensioned to prevent the display screen 200 from arching due to relaxation, thereby affecting the display effect of the display screen 200. By adjusting the distance between the shell 300 and the base 1 through the transmission component 5, the distance between the ends of the two shells 300 can be adjusted, so that the hinge mechanism 100 can adapt well to the changes in the lengths of the first area 210 and the second area 220 of the display screen 200 when the display screen 200 is folded and unfolded, thereby realizing constant length control of the display screen 200 during the unfolding and folding process (constant length specifically means that the length of the display screen 200 is constant during the unfolding and folding process, as shown in Figure 8a, the length of the display screen 200 refers to the distance between the a end and the b end of the display screen 200), avoiding the display screen 200 from being pulled and arched, and ensuring the normal operation of the display screen 200.

The structure of the transmission component 5 is not unique. Figures 8a and 8b show a first structure of the transmission component 5. In this embodiment, the transmission component 5 is a gear. There are multiple transmission components 5, and the multiple transmission components 5 can be rotatably arranged on the second swing arm 4, and two adjacent transmission components 5 are meshed with each other. The transmission component 5 located at one end is meshed with the rack c1 fixed on the first swing arm 3, and the transmission component 5 located at the other end is meshed with the rack c2 fixed on the connecting member 6. When the swing arm assembly 2 rotates relative to the base 1, the first swing arm 3 slides relative to the second swing arm 4 to drive the transmission component 5 to rotate relative to the second swing arm 4. The transmission component 5 drives the connecting member 6 to move closer to or away from the base 1 through the rack c2, so that the connecting member 6 drives the shell 300 to move closer to or away from the base 1.

As shown in FIG8a and FIG8b , the number of the transmission components 5 is an even number, such as 2. In this way, the transmission component 5 can convert the movement of the first swing arm 3 away from the base 1 relative to the second swing arm 4 into the movement of the connecting member 6 away from the base 1, and convert the movement of the first swing arm 3 towards the base 1 relative to the second swing arm 4 into the movement of the connecting member 6 towards the base 1.

FIG9a and FIG9b show a second structure of the transmission component 5, wherein FIG9a is a schematic diagram of the foldable electronic device (mobile phone) in the second embodiment of the present application in an unfolded state, and FIG9b is a schematic diagram of the foldable electronic device (mobile phone) in the second embodiment of the present application in a folded state. The main difference between the transmission component 5 in the second embodiment and the first embodiment is that the number of the transmission components 5 is different, as described below:

As shown in FIG. 9 a and FIG. 9 b , the number of the transmission components 5 is an odd number, such as three.

Among them, along the height direction H of the base 1, the distance from the rotation center axis O1 of the first swing arm 3 to the shaft cover 12 is smaller than the distance from the rotation center axis O2 of the second swing arm 4 to the shaft cover 12. Of course, it is not limited to this, and the distances from the rotation center axis O1 and the rotation center axis O2 to the shaft cover 12 can also be equal, and the distance from the rotation center axis O1 to the mid-plane 10 is greater than the distance from the rotation center axis O2 to the mid-plane 10.

As shown in Figure 9a, when the swing arm assembly 2 rotates from the unfolded position to the folded position (that is, the swing arm assembly 2 rotates along the direction of R01 in the figure), the first swing arm 3 slides along the first direction M1 relative to the second swing arm 4, so as to drive the odd-numbered transmission components 5 to rotate relative to the second swing arm 4, and the transmission component 5 drives the connecting member 6 to move closer to the base 1 through the rack c2, so that the connecting member 6 drives the shell 300 to move closer to the base 1; wherein, the first direction M1 is the direction away from the base 1.

As shown in Figure 9b, when the swing arm assembly 2 rotates from the folded position to the unfolded position (that is, the swing arm assembly 2 rotates along the direction of R02 in the figure), the first swing arm 3 slides along the second direction M2 relative to the second swing arm 4, so as to drive the odd-numbered transmission components 5 to rotate relative to the second swing arm 4, and the transmission component 5 drives the connecting member 6 to move away from the base 1 through the rack c2, so that the connecting member 6 drives the shell 300 to move away from the base 1, wherein the second direction M2 is the direction close to the base 1.

By setting the number of transmission components 5 to an odd number, the transmission component 5 can convert the movement of the first swing arm 3 away from the base 1 relative to the second swing arm 4 into the movement of the connecting member 6 approaching the base 1, and convert the movement of the first swing arm 3 approaching the base 1 relative to the second swing arm 4 into the movement of the connecting member 6 away from the base 1, thereby enabling the transmission component 5 to realize the function of adjusting the direction of movement.

FIG10a and FIG10b show the third structure of the transmission component 5, wherein FIG10a is a schematic diagram of the foldable electronic device (mobile phone) in the third embodiment of the present application in an unfolded state, and FIG10b is a schematic diagram of the foldable electronic device (mobile phone) in the third embodiment of the present application in a folded state. The main difference between the transmission component 5 in the third embodiment and the first embodiment is that the structure of the transmission component 5 is different, as described below:

The transmission component 5 includes a rotating member 51, which is rotatably connected to the second swing arm 4 through a first rotating shaft 52. The rotating member 51 has a first connecting portion 511 and a second connecting portion 512 arranged along the circumference of the first rotating shaft 52. The first connecting portion 511 is connected to the first swing arm 3, and the second connecting portion 512 is connected to the connecting member 6.

The first connection portion 511 and the second connection portion 512 are located on the same side of the first rotating shaft 52 . For example, as shown in FIGS. 10 a and 10 b , the first connection portion 511 and the second connection portion 512 are located on the lower side of the first rotating shaft 52 .

Among them, along the height direction H of the base 1, the distance from the rotation center axis O1 of the first swing arm 3 to the shaft cover 12 is greater than the distance from the rotation center axis O2 of the second swing arm 4 to the shaft cover 12. Of course, it is not limited to this, and the distances from the rotation center axis O1 and the rotation center axis O2 to the shaft cover 12 can also be equal, and the distance from the rotation center axis O1 to the mid-plane 10 is less than the distance from the rotation center axis O2 to the mid-plane 10.

With such arrangement, as shown in FIG10a, when the swing arm assembly 2 rotates from the unfolded position to the folded position, when the first swing arm 3 slides relative to the second swing arm 4 along the first direction M1, the first swing arm 3 drives the rotating member 51 to rotate along the first turning direction R1, so that the second connecting portion 512 of the rotating member 51 gradually approaches the base 1, so as to drive the connecting member 6 to move closer to the base 1, thereby causing the connecting member 6 to drive the shell 300 to move closer to the base 1; wherein, the first direction M1 is the direction close to the base 1.

As shown in Figure 10b, when the swing arm assembly 2 rotates from the folded position to the unfolded position, when the first swing arm 3 slides relative to the second swing arm 4 along the second direction M2, the first swing arm 3 drives the rotating member 51 to rotate along the second turning point R2, so that the second connecting portion 512 of the rotating member 51 gradually moves away from the base 1, so as to drive the connecting member 6 to move away from the base 1, thereby causing the connecting member 6 to drive the shell 300 away from the base 1, wherein the second direction M2 is a direction away from the base 1, and the second turning point R2 is opposite to the first turning point R1.

In this embodiment, the connecting member 6 is driven to move closer to or away from the base 1 by the rotation of the rotating member 51. Such an arrangement can simplify the structure of the transmission component 5 and reduce the number of parts of the transmission component 5, thereby facilitating improving the working reliability of the transmission component 5.

In some embodiments, as shown in Figure 10a, the rotating member 51 has a first rotating arm 513 and a second rotating arm 514, the first rotating arm 513 is fixedly connected to the second rotating arm 514, and the first rotating arm 513 and the second rotating arm 514 are connected at an acute angle, such as 30 degrees, and the corner portion formed by the connection between the first rotating arm 513 and the second rotating arm 514 is rotatably connected to the second swing arm 4, and the end of the first rotating arm 513 away from the corner portion is the first connection portion 511, and the end of the second rotating arm 514 away from the corner portion is the second connection portion 512.

Figures 11a, 11b and 12 to 19 show a fourth structure of the transmission component 5, wherein Figure 11a is a schematic diagram of a foldable electronic device (mobile phone) in an unfolded state in the fourth embodiment of the present application, Figure 11b is a schematic diagram of a foldable electronic device (mobile phone) in a folded state in the fourth embodiment of the present application, Figure 12 is a schematic diagram of the structure of the rotating shaft mechanism 100 in the fourth embodiment of the present application, Figure 13 is an exploded view of the rotating shaft mechanism 100 in Figure 12 after the shielding member 92 is removed, and Figure 14 is an exploded view of the rotating shaft mechanism 100 in Figure 12 FIG15 is a partial view of the pivot mechanism 100 in FIG14 after the cover plate 63 of the connecting member 6 on one side is removed, FIG16 is a partial view of the pivot mechanism 100 in FIG12 after the support members 8 on both sides and the cover plate 63 of the connecting member 6 are removed, FIG17 is a top view of the pivot mechanism 100 in FIG16 after the shielding member 92 is removed, FIG18 is a C-C sectional view of the pivot mechanism 100 in FIG15 after the cover plate 63 of the lower connecting member 6 is installed, and FIG19 is an F-F sectional view of the pivot mechanism 100 in FIG17.

The main difference between the transmission component 5 in the fourth embodiment and the third embodiment is that the first connecting portion 511 and the second connecting portion 512 are arranged at different positions relative to the first rotating shaft 52, as described in detail as follows:

As shown in Fig. 11a and Fig. 14 to Fig. 17, the first connection portion 511 and the second connection portion 512 are respectively located on opposite sides of the first rotating shaft 52. For example, as shown in Fig. 14 and Fig. 15, the rotating member 51 is a strip-shaped structure, that is, the length of the rotating member 51 is greater than the width of the rotating member 51, the first connection portion 511 is located at one end of the rotating member 51, and the second connection portion 512 is located at the other end of the rotating member 51.

As shown in Fig. 11a, Fig. 18 and Fig. 19, along the height direction H of the base 1, the distance from the rotation center axis O1 of the first swing arm 3 to the shaft cover 12 is smaller than the distance from the rotation center axis O2 of the second swing arm 4 to the shaft cover 12. Of course, it is not limited thereto, and the distances from the rotation center axis O1 and the rotation center axis O2 to the shaft cover 12 may also be equal, and the distance from the rotation center axis O1 to the mid-plane 10 is larger than the distance from the rotation center axis O2 to the mid-plane 10.

As shown in Figure 11a, when the swing arm assembly 2 rotates from the unfolded position to the folded position, when the first swing arm 3 slides relative to the second swing arm 4 along the first direction M1, the first swing arm 3 drives the rotating member 51 to rotate along the first turning direction R1, so that the second connecting portion 512 of the rotating member 51 gradually approaches the base 1, so as to drive the connecting member 6 to move closer to the base 1, thereby making the connecting member 6 drive the shell 300 to approach the base 1; wherein, the first direction M1 is the direction away from the base 1.

As shown in Figure 11b, when the swing arm assembly 2 rotates from the folded position to the unfolded position, when the first swing arm 3 slides relative to the second swing arm 4 along the second direction M2, the first swing arm 3 drives the rotating member 51 to rotate along the second turning direction R2, so that the second connecting portion 512 of the rotating member 51 gradually moves away from the base 1, so as to drive the connecting member 6 to move away from the base 1, thereby causing the connecting member 6 to drive the shell 300 away from the base 1, wherein the second direction M2 is a direction close to the base 1.

By arranging the first connection part 511 and the second connection part 512 on opposite sides of the first rotating shaft 52, the movement of the first swing arm 3 away from the base 1 relative to the second swing arm 4 can be converted into the movement of the connection part 6 approaching the base 1, and the movement of the first swing arm 3 approaching the base 1 relative to the second swing arm 4 can be converted into the movement of the connection part 6 away from the base 1, so that the rotating part 51 can achieve the function of adjusting the movement direction. At the same time, the first connection part 511 and the second connection part 512 are respectively arranged on opposite sides of the first rotating shaft 52, so that the structure of the rotating part 51 can be more compact, for example, the rotating part 51 can be set as a strip structure, and the rotating part 51 occupies less space when rotating, which is conducive to the optimized layout between the various components in the swing arm assembly 2.

In some embodiments, as shown in FIG. 11a, FIG. 14 and FIG. 15, the distance L1 from the first connection portion 511 to the central axis of the first rotating shaft 52 is smaller than the distance L2 from the second connection portion 512 to the central axis of the first rotating shaft 52. In this way, the rotating member 51 is equivalent to a "lever" and plays a role in amplifying the motion stroke, that is, the rotating member 51 can amplify the smaller motion distance between the first swing arm 3 and the second swing arm 4, thereby achieving a larger motion distance between the connecting member 6 and the base 1, and thus can well meet the requirement of constant length control of the display screen 200 during folding and unfolding.

As shown in Fig. 11a, Fig. 14 and Fig. 15, L2/L1 satisfies: 1≤L2/L1≤3. For example, as shown in Fig. 15, L2/L1=1.5.

The structures of the first connection part 511 and the second connection part 512 are not unique. In some embodiments, as shown in FIG. 14 and FIG. 15 , the first connection part 511 and the second connection part 512 both include a plurality of teeth arranged along the circumference of the first rotating shaft 52. A first rack 30 is fixed on the first swing arm 3, and a second rack 60 is fixed on the connecting member 6. The first rack 30 and the second rack 60 both extend in a direction parallel to the first direction M1. The first rack 30 meshes with the first connection part 511, and the second rack 60 meshes with the second connection part 512. Such a configuration can not only simplify the connection structure between the rotating member 51 and the first swing arm 3 and the connecting member 6, without adopting other complex connection structures, which is beneficial to reducing the manufacturing cost of the rotating shaft mechanism 100, but also make the connection between the rotating member 51 and the first swing arm 3 and the connecting member 6 more firm, thereby improving the working reliability of the rotating member 51.

As shown in Fig. 14 and Fig. 15, the first rack 30 and the first swing arm 3 are an integral structure, but it is not limited thereto. The first rack 30 and the first swing arm 3 can also be designed separately and then assembled together. As shown in Fig. 14 and Fig. 15, the second rack 60 and the connecting member 6 are an integral structure, but it is not limited thereto. The second rack 60 and the connecting member 6 can also be designed separately.

In other embodiments, the rotating member 51 and the first swing arm 3 and the connecting member 6 may also be connected by magnetic attraction. Specifically, the first connecting portion 511 and the second connecting portion 512 are magnetic attracting members, such as magnets, disposed on the rotating member 51. The first swing arm 3 and the connecting member 6 are respectively provided with magnetic attracting members, such as metal blocks, which can be attracted to the magnetic attracting members. The first connecting portion 511 is attracted to the magnetic attracting member on the first swing arm 3, and the second connecting portion 512 is attracted to the magnetic attracting member on the connecting member 6.

In some other embodiments, the rotating member 51 and the first swing arm 3 and the connecting member 6 can also be connected by a snap-fitting manner. Specifically, as shown in Figures 11a and 11b, the first connecting portion 511 and the second connecting portion 512 are respectively snap-fitting protrusions arranged on the rotating member 51, and the first swing arm 3 and the connecting member 6 are respectively provided with snap-fitting grooves that can cooperate with the snap-fitting protrusions. The first connecting portion 511 extends into the snap-fitting groove on the first swing arm 3, and there is a gap between the first connecting portion 511 and the groove wall of the snap-fitting groove on the first swing arm 3 for the first connecting portion 511 to move in the snap-fitting groove; the second connecting portion 512 extends into the snap-fitting groove on the second swing arm 4, and there is a gap between the second connecting portion 512 and the groove wall of the snap-fitting groove on the connecting member 6 for the second connecting portion 512 to move in the snap-fitting groove.

Figure 21 is a front view of the assembly formed by the first swing arm 3, the second swing arm 4 and the base 1 in the fourth embodiment of the present application, Figure 22 is a back view of the assembly formed by the first swing arm 3, the second swing arm 4 and the base 1 in the fourth embodiment of the present application, Figure 23 is a connection relationship diagram of the first swing arm 3 and the second swing arm 4 in the fourth embodiment of the application, Figure 24 is a structural schematic diagram of the second swing arm 4 in the fourth embodiment of the application, Figure 25 is an A-A cross-sectional view of the rotating shaft mechanism 100 in Figure 15 after the cover plate 63 is installed on the lower side of the connecting member 6, and Figure 26 is a B-B cross-sectional view of the rotating shaft mechanism 100 in Figure 15 after the cover plate 63 is installed on the lower side of the connecting member 6.

In some embodiments, as shown in FIG. 21 , FIG. 22 and FIG. 23 , the first sliding structure 71 includes a first sliding groove 72 and a first limiting structure 73 . The first sliding groove 72 is disposed on the first swing arm 3 and extends in a direction parallel to the first direction M1 .

As shown in Fig. 21, Fig. 23 and Fig. 24, the second swing arm 4 includes a swing arm section 41 rotatably connected to the base 1, and a slide arm section 42 rotatably connected to the swing arm section 41, and both the swing arm section 41 and the slide arm section 42 are slidably matched with the first slide groove 72; the first limiting structure 73 is used to prevent the slide arm section 42 from moving relative to the first slide groove 72 along the groove depth direction of the first slide groove 72. Among them, the groove depth direction of the first slide groove 72 is perpendicular to the first direction M1 and the groove width direction Y of the first slide groove 72.

In this embodiment, by configuring the second swing arm 4 to be a swing arm segment 41 and a sliding arm segment 42 rotatably connected to the swing arm segment 41, and configuring a first limiting structure 73, during the rotation of the swing arm assembly 2 relative to the base 1, the swing arm segment 41 and the sliding arm segment 42 can rotate relative to each other while sliding along the first sliding groove 72. Such a design can better confine the second swing arm 4 in the first sliding groove 72, thereby increasing the overlapping area between the first swing arm 3 and the second swing arm 4, reducing the space occupied by the second swing arm 4 outside the first swing arm 3, and making the structure of the swing arm assembly 2 more compact.

The swing arm section 41 and the slide arm section 42 can be rotatably connected by the following structure: as shown in FIG24 , a connecting ear 426 is provided on the slide arm section 42, a connecting ear receiving groove 416 is provided on the swing arm section 41, a connecting hole 4161 is provided on the groove wall of the connecting ear receiving groove 416, a connecting shaft is provided on the connecting ear 426, the connecting ear 426 extends into the connecting ear receiving groove 416, and the connecting shaft is rotatably matched with the connecting hole 4161. Of course, it is not limited to this, and the swing arm section 41 and the slide arm section 42 can also be rotatably connected by other structures.

In some embodiments, as shown in FIG. 21, FIG. 23 and FIG. 25, the first limiting structure 73 includes a first limiting groove 731 and a first protrusion 732, the first limiting groove 731 is provided on the slide arm section 42, the first protrusion 732 is provided on the groove side wall of the first slide groove 72, the first limiting groove 731 extends in a direction parallel to the first direction M1, the first limiting groove 731 has two first groove walls 7311 arranged along the groove depth direction of the first slide groove 72, and the first protrusion 732 is slidably provided between the two first groove walls 7311. By providing the first limiting structure 73 as the cooperation between the first protrusion 732 and the first limiting groove 731, the first limiting structure 73 can be made simpler without adding other additional components, thereby facilitating the reduction of the design and manufacturing cost of the rotating shaft mechanism 100.

21 and 25 , the first protrusion 732 may be a convex rib extending in a direction parallel to the first direction M1 . However, the present invention is not limited thereto, and the first protrusion 732 may also be a limiting column.

Of course, the positions of the first limiting groove 731 and the first protrusion 732 may also be interchanged, that is, the first limiting groove 731 is disposed on the groove side wall of the first sliding groove 72 , and the first protrusion 732 is disposed on the sliding arm section 42 .

In some embodiments, as shown in FIG. 18 , FIG. 22 and FIG. 24 , the first swing arm 3 has a stopper 31, the slide arm section 42 has an abutment 421, the stopper 31 is located on a side of the abutment 421 close to the base 1, and when the swing arm assembly 2 is in the folded position, the abutment 421 stops at the position of the stopper 31. In this arrangement, the stopper 31 can stop the abutment 421, and can well control the rotation angle of the swing arm assembly 2 when it rotates to the folded position, thereby avoiding the extrusion damage of the slide arm section 42 to the base 1 when the swing arm assembly 2 rotates at an excessively large angle.

In some embodiments, as shown in Figures 21 and 22, the first swing arm 3 includes two swing parts 32, the two swing parts 32 are arranged at intervals along the length direction Y of the base 1, the first slide groove 72 is located between the two swing parts 32, and the stop part 31 connects the two swing parts 32.

As shown in FIG. 18 , a transmission component 5 is provided on one side of the slide arm section 42 , and a boss is provided on the other side of the slide arm section 42 . The boss is an abutment portion 421 , and the stop portion 31 and the abutment portion 421 are located on the same side of the slide arm section 42 .

By arranging the abutment portion 421, the stop portion 31 and the transmission component 5 on different sides of the sliding arm section 42 respectively, the abutment portion 421 and the stop portion 31 can be located outside the movement range of the transmission component 5, thereby avoiding movement interference between the transmission component 5 and the abutment portion 421 and the stop portion 31.

As shown in FIG. 21 and FIG. 22 , the stopper 31 and the two swinging parts 32 are an integral structure; but the present invention is not limited thereto, and the stopper 31 and the two swinging parts 32 may also be designed separately and then assembled together.

The first sliding structure 71 is also not limited to the above structure. For example, the first sliding structure 71 includes a pin groove arranged on the first swing arm 3 and a pin shaft arranged on the second swing arm 4. One end of the pin groove is close to the base 1, and the other end is far away from the base 1. The swing arm section 41 and the sliding arm section 42 in the second swing arm 4 are an integrated structure, and the pin shaft and the pin groove are slidably matched.

The specific structure of the rotatable connection between the first swing arm 3 and the base 1 is not unique. In some embodiments, the first swing arm 3 can be rotatably connected to the base 1 by means of a shaft hole. As shown in FIG19 and FIG23, the first swing arm 3 is provided with a shaft hole 38, and the base 1 is provided with a second shaft 19, and the second shaft 19 is rotatably matched with the shaft hole 38. Of course, it is not limited thereto. The first swing arm 3 can also be rotatably connected to the base 1 by means of a connecting groove and a connecting piece. Specifically, the base 1 is provided with an arc-shaped connecting groove, and the first swing arm 3 is provided with an arc-shaped connecting piece, and the connecting piece is slidably matched with the connecting groove.

In some embodiments, as shown in FIG. 11 a and FIG. 18 , the second swing arms 4 of a pair of swing arm assemblies 2 are connected by an even number of gears 74 so that the pair of swing arm assemblies 2 rotate synchronously relative to the base 1 between the folded position and the unfolded position.

The even number of gears 74 may all be incomplete gears 74, or may all be complete gears 74, or may be a combination of incomplete gears 74 and complete gears 74, which is not specifically limited here. For example, as shown in FIG18, both gears 74 are incomplete gears 74. An incomplete gear 74 means that teeth and tooth grooves are distributed on a portion of the circumferential surface of the gear 74 in the circumferential direction; a complete gear 74 means that teeth and tooth grooves are distributed on the entire circumferential surface of the gear 74 in the circumferential direction.

By connecting an even number of gears 74 between the second swing arms 4 of a pair of swing arm assemblies 2, when the second swing arm 4 of one of the swing arm assemblies 2 rotates a certain angle relative to the base 1, the second swing arm 4 can transmit power to the second swing arm 4 of the other swing arm assembly 2 through the even number of gears 74, so that the second swing arm 4 of the swing arm assembly 2 also rotates the same angle relative to the base 1, thereby realizing the synchronous rotation of the second swing arm 4 relative to the base 1, and then the synchronous rotation of the swing arm assembly 2 relative to the base 1.

As shown in FIG. 11a and FIG. 18, the number of the gears 74 can be two, and each gear 74 is fixedly connected to the corresponding second swing arm 4. When the second swing arm 4 includes a swing arm section 41 and a sliding arm section 42, each gear 74 is fixedly connected to the corresponding swing arm section 41. As shown in FIG. 23 and FIG. 24, a third rotating shaft 49 is provided on the end surface of the gear 74 fixedly connected to the swing arm section 41, and the third rotating shaft 49 is rotatably matched with the hole on the base 1, so that the swing arm section 41 can be rotatably connected to the base 1. The gear 74, the second swing arm 4, and the third rotating shaft 49 can be an integral structure or a split design, which is not specifically limited here.

In some embodiments, as shown in Fig. 11a, Fig. 17 and Fig. 20, Fig. 20 is an E-E cross-sectional view of the rotating shaft mechanism 100 in Fig. 17. The swing arm assembly 2 further includes a support member 8, which is rotatably connected to the base 1 and is also slidably connected to the connecting member 6, the support member 8 has an arc-shaped first supporting surface 80, and the connecting member 6 has a second supporting surface 61, and the second supporting surface 61 and the first supporting surface 80 constitute the supporting surface of the swing arm assembly 2.

With such a configuration, the support member 8 and the connecting member 6 can jointly support the display screen 200, thereby expanding the support area of the hinge mechanism 100 for the display screen 200. Thus, when the display screen 200 is unfolded, the first area 210 of the display screen 200 can be prevented from being dented, thereby making it easier for the display screen 200 to maintain a flat state, thereby improving the display effect of the display screen 200. At the same time, the support member 8 has an arc-shaped first support surface 80, so that when the display screen 200 is folded, the first support surface 80 can well support the curved first area 210, thereby preventing the first area 210 from being deformed.

Among them, the support member 8 can be rotatably connected to the base 1 through the following structure: as shown in Figures 17 and 20, an arc groove 13 is provided on the base 1, and an arc piece 81 is provided on the support member 8. The arc piece 81 slides in cooperation with the arc groove 13 so that the support member 8 can be rotatably connected to the base 1.

The support member 8 can be slidably connected to the connecting member 6 through the following structure: as shown in Figures 16 and 20, a sliding connection groove 67 is provided on the connecting member 6, one end of the sliding connection groove 67 is close to the base 1, and the other end of the sliding connection groove 67 is far away from the base 1, and a sliding connection arm 82 is provided on the support member 8, and the sliding connection arm 82 is slidably matched with the sliding connection groove 67 to make the support member 8 and the connecting member 6 slidably connected.

In some embodiments, as shown in Figure 11a and Figures 12 to 14, the connector 6 includes a cover plate 63, and a sub-connector 62 detachably connected to the cover plate 63, the second support surface 61 is located on the cover plate 63, the sub-connector 62 is connected to the transmission component 5, and the sub-connector 62, the first swing arm 3, the second swing arm 4 and the transmission component 5 are all located on the side of the cover plate 63 away from the second support surface 61.

By detachably connecting the sub-connector 62 and the cover plate 63, when the first swing arm 3, the second swing arm 4 and the transmission component 5 on the back side of the cover plate 63 are damaged, the cover plate 63 and the sub-connector 62 can be detached to facilitate the maintenance and replacement of the first swing arm 3, the second swing arm 4 and the transmission component 5, thereby helping to reduce the maintenance cost of the rotating shaft mechanism 100.

As shown in Figures 27, 28 and 29, Figure 27 is a schematic diagram of the structure of the back side of the connector 6 of the rotating shaft mechanism 100 in Figure 12, Figure 28 is an exploded view of the connector 6 shown in Figure 27, and Figure 29 is a partial enlarged view of Figure 28. The sub-connector 62 and the cover plate 63 are detachably connected by fasteners (such as screws), but it is not limited thereto. The sub-connector 62 and the cover plate 63 can also be detachably connected by means of snap connection or the like.

The number of sub-connectors 62 may be one or more, which may correspond to the number of first swing arms 3. For example, as shown in FIGS. 14 , 27 and 28 , the number of sub-connectors 62 is two. Along the length direction Y of the base 1 , the two sub-connectors 62 are respectively located at the two ends of the cover plate 63 .

In some embodiments, as shown in FIG. 14 , FIG. 15 and FIG. 25 , the connecting member 6 is slidably connected to the first swing arm 3 through a second sliding structure 75; the second sliding structure 75 includes a second slide groove 76, a sliding fitting portion 77 and a second limiting structure 78, the second slide groove 76 is arranged on the first swing arm 3, the sliding fitting portion 77 is arranged on the connecting member 6, the second slide groove 76 extends in a direction parallel to the first direction M1, and the sliding fitting portion 77 is slidably fitted with the second slide groove 76; the second limiting structure 78 is used to prevent the sliding fitting portion 77 from moving relative to the second slide groove 76 along the groove depth direction of the second slide groove 76. Among them, as shown in FIG. 14 , the groove depth direction of the second slide groove 76 is perpendicular to the first direction M1 and the groove width direction Y of the second slide groove 76.

By slidingly engaging the sliding engagement portion 77 with the second slide groove 76, the shaking of the connecting member 6 relative to the first swing arm 3 along the groove width direction Y of the second slide groove 76 can be reduced. By setting a second limiting structure 78, the shaking of the connecting member 6 relative to the first swing arm 3 along the groove depth direction of the second slide groove 76 can be reduced. In this way, the connecting member 6 can be relatively stable when moving toward and away from the base 1.

Among them, the sliding matching part 77 and the second slide groove 76 can be provided in one group, or multiple groups can be provided correspondingly, and the multiple groups of sliding matching parts 77 and the second slide groove 76 are arranged along the length direction Y of the base 1. For example, as shown in FIG. 14, two groups of sliding matching parts 77 and the second slide groove 76 are provided correspondingly, and along the length direction Y of the base 1, the two groups of sliding matching parts 77 and the second slide groove 76 are distributed on opposite sides of the second swing arm 4. The sliding matching parts 77 and the second slide groove 76 are provided in multiple groups correspondingly, so that the connecting member 6 can be more stable in the process of moving close to and away from the base 1.

As shown in FIG. 14 , the sliding fitting portion 77 is a strip-shaped structure, but is not limited thereto. The sliding fitting portion 77 may also be a block-shaped structure, a spherical structure, etc., as long as it can ensure sliding fit with the second sliding groove 76 .

As shown in FIG. 14 and FIG. 29 , the second rack 60 and the sliding fitting portion 77 are an integral structure, but the present invention is not limited thereto. The second rack 60 and the sliding fitting portion 77 may also be designed as separate bodies.

Of course, the positions of the second slide groove 76 and the sliding fitting portion 77 may also be interchanged, that is, the second slide groove 76 is disposed on the connecting member 6 , and the sliding fitting portion 77 is disposed on the first swing arm 3 .

In some embodiments, as shown in FIG. 14, FIG. 16 and FIG. 25, the second limiting structure 78 includes a second limiting groove 781 and a second protrusion 782, the second limiting groove 781 is arranged on the groove side wall of the second slide groove 76, and the second protrusion 782 is arranged on the sliding matching portion 77; the second limiting groove 781 extends in a direction parallel to the first direction M1, and the second limiting groove 781 has two second groove walls 7811 arranged along the groove depth direction of the second slide groove 76, and the second protrusion 782 is slidingly matched and arranged between the two second groove walls 7811. By setting the second limiting structure 78 as the cooperation between the second protrusion 782 and the second limiting groove 781, the second limiting structure 78 can be made simpler, without adding other additional components, which is conducive to reducing the design and manufacturing costs of the rotating shaft mechanism 100.

14 and 16 , the second protrusion 782 may be a convex rib extending in a direction parallel to the first direction M1. However, the present invention is not limited thereto, and the first protrusion 732 may also be a limiting column.

Of course, the second limiting groove 781 and the second protrusion 782 may be disposed at opposite positions, that is, the second limiting groove 781 is disposed on the sliding fitting portion 77 , and the second protrusion 782 is disposed on the groove side wall of the second sliding groove 76 .

In some embodiments, as shown in FIG. 11a, FIG. 12 and FIG. 16, the swing arm assembly 2 further includes a shielding member 92, which is located on the back side (the side away from the display screen 200) of the first swing arm 3, the second swing arm 4 and the connecting member 6, and the first swing arm 3 is fixedly connected to the shielding member 92. With such a configuration, when the swing arm assembly 2 is in the unfolded position, the shielding member 92 can shield the first swing arm 3, the second swing arm 4 and the connecting member 6, and the shielding member 92 can not only protect the first swing arm 3, the second swing arm 4 and the connecting member 6 on the inner side to prevent the first swing arm 3, the second swing arm 4 and the connecting member 6 from being damaged by collision with external objects, but also make the appearance of the foldable electronic device more beautiful when unfolded.

In some embodiments, as shown in Figures 13, 14 and 25, the connecting member 6 is slidably connected to the shielding member 92 through a third sliding structure 93; the third sliding structure 93 includes a third sliding groove 931 and a third protrusion 932, the third sliding groove 931 is arranged on the shielding member 92, the third protrusion 932 is arranged on the connecting member 6, the third sliding groove 931 extends in a direction parallel to the first direction M1, and the third protrusion 932 is slidably matched with the third sliding groove 931.

The connecting member 6 is slidably connected to the shielding member 92 through the third sliding structure 93, which can further reduce the shaking of the connecting member 6 in the process of approaching or moving away from the base 1, so that the connecting member 6 can move more smoothly in the process of approaching and moving away from the base 1. At the same time, the third sliding structure 93 is set as the cooperation of the third protrusion 932 and the third sliding groove 931, which can make the third sliding structure 93 simpler without adding other additional parts, thereby helping to reduce the design and manufacturing cost of the rotating shaft mechanism 100.

13 and 14 , the third protrusion 932 may be a convex rib extending in a direction parallel to the first direction M1 . However, the present invention is not limited thereto, and the third protrusion 932 may also be a limiting column.

As shown in FIGS. 13 and 14 , the third protrusion 932 is disposed on the cover plate 63 of the connector 6 , but the present invention is not limited thereto. The third protrusion 932 may also be disposed on the sub-connector 62 .

Of course, the positions of the third slide groove 931 and the third protrusion 932 may also be interchanged, that is, the third slide groove 931 is disposed on the connecting member 6 , and the third protrusion 932 is disposed on the shielding member 92 .

As shown in Figures 30, 31 and 32, Figure 30 is a bottom view of the rotating shaft mechanism 100 shown in Figure 12, Figure 31 is a partial view of the rotating shaft mechanism 100 in Figure 30 after removing the shielding member 92 on one side, and Figure 32 is a partial view of the rotating shaft mechanism 100 in Figure 30 after removing the shielding members 92 on both sides. The first swing arm 3 and the shielding member 92 are fixedly connected by fasteners (such as screws), but it is not limited thereto. The first swing arm 3 and the shielding member 92 can also be fixedly connected by means of clamping, plugging, bonding, etc.

In some embodiments, as shown in Fig. 17 and Fig. 31 to Fig. 33, Fig. 33 is a D-D cross-sectional view of the rotating shaft mechanism 100 in Fig. 25. The connecting member 6 is slidably connected to the first swing arm 3, and a damping device 91 is provided on the connecting member 6. The damping device 91 includes an elastic member 911 and an abutting joint 912 connected to the elastic member 911. The elastic member 911 is used to apply an elastic force to the abutting joint 912 so that the abutting joint 912 abuts against the first swing arm 3; when the connecting member 6 slides relative to the first swing arm 3 in a direction parallel to the first direction M1 under the drive of the transmission member 5, the abutting joint 912 rubs against the first swing arm 3 to apply a damping force to the connecting member 6.

In this way, the damping device 91 slows down the relative sliding speed between the connecting member 6 and the first swing arm 3, so that when the swing arm assembly 2 rotates relative to the base 1, the connecting member 6 drives the shell 300 to move more smoothly, so as to better adapt to the changes in the length of the first area 210 and the second area 220 of the display screen 200 when the display screen 200 is folded and unfolded.

As shown in Fig. 17 and Fig. 33, the elastic component 911 includes a guide column 9111 and a spring 9112, one end of the guide column 9111 is connected to the connecting member 6, the other end of the guide column 9111 is slidably matched with the abutment head 912, the spring 9112 is sleeved on the guide column 9111, and one end of the spring 9112 is abutted against the connecting member 6, the other end of the spring 9112 is abutted against the abutment head 912, and the spring 9112 is in a compressed state to apply elastic force to the abutment head 912 so that the abutment head 912 abuts against the first swing arm 3. Of course, the structure of the elastic component 911 is not limited thereto, and other elastic components 911 can also be used according to actual conditions.

In some embodiments, as shown in FIG33 , the first swing arm 3 includes a near end surface 33 disposed near the base 1, a far end surface 34 disposed far away from the base 1, and a swing arm side surface 35 connected between the near end surface 33 and the far end surface 34, the swing arm side surface 35 is used to abut against the abutment joint 912, and a first guide slope 36 is disposed between the swing arm side surface 35 and the far end surface 34, and the first guide slope 36 is disposed obliquely relative to the swing arm side surface 35; when the swing arm assembly 2 is in the unfolded position, the abutment joint 912 abuts against the first guide slope 36. By providing the first guide slope 36, when the swing arm assembly 2 rotates toward the folded position, the first guide slope 36 can guide the abutment joint 912, so that the abutment joint 912 can slide along the first guide slope 36 to the swing arm side surface 35, thereby making the relative movement between the abutment joint 912 and the first swing arm 3 smoother, and avoiding jamming between the abutment joint 912 and the first swing arm 3.

In some embodiments, as shown in FIG33 , a second guiding slope 9121 is provided on the abutting joint 912, and the second guiding slope 9121 is inclined relative to the swing arm side surface 35. When the swing arm assembly 2 is in the deployed position, the second guiding slope 9121 abuts against the first guiding slope 36. By providing the second guiding surface on the abutting joint 912, the movement of the abutting joint 912 along the first guiding slope 36 is smoother, thereby better avoiding jamming between the abutting joint 912 and the first swing arm 3.

In some embodiments, as shown in Figures 32 and 33, the connecting member 6 has a first accommodating space 64, a second accommodating space 65, and a connecting hole 66 connecting the first accommodating space 64 and the second accommodating space 65. The first accommodating space 64 and the second accommodating space 65 are arranged along the length direction Y of the base 1, the first swing arm 3 extends into the first accommodating space 64, the elastic component 911 is arranged in the second accommodating space 65, and the abutment joint 912 extends into the first accommodating space 64 through the connecting hole 66 and abuts against the first swing arm 3.

By extending the first swing arm 3 into the first accommodating space 64 and arranging the elastic component 911 in the second accommodating space 65, it is possible to prevent the first swing arm 3 and the damping device 91 from occupying too much space outside the connecting member 6, thereby making the structure of the swing arm assembly 2 more compact, which is beneficial to reducing the volume of the rotating shaft mechanism 100. By extending the abutting joint 912 through the connecting hole 66 into the first accommodating space 64 and abutting against the first swing arm 3, the connecting hole 66 can limit the abutting joint 912, and can reduce the shaking of the abutting joint 912 relative to the first swing arm 3, so that the abutting joint 912 can move more smoothly relative to the first swing arm 3 to provide a stable damping force.

As shown in FIG. 32 and FIG. 33 , the first accommodating space 64 , the second accommodating space 65 and the communicating hole 66 are all disposed on the connector body 62 .

In some embodiments, as shown in FIGS. 28 , 29 and 33 , the second accommodation space 65 is located on the cover plate 63 , and the first accommodation space 64 and the connecting hole 66 are both surrounded by the cover plate 63 and the sub-connector 62 .

In some embodiments, as shown in Figures 32 and 33, the first swing arm 3 is slidably matched with the first accommodating space 64. In this way, the first accommodating space 41 can limit the first swing arm 3, thereby reducing the shaking of the first swing arm 3 during the rotation of the first swing arm 3 relative to the base 1.

The types of hatching lines in the drawings of this application are to distinguish different components and should not be understood as limiting the materials of the components. The drawings of this application are to illustrate the structural composition and are not shown in proportion to the actual product.

Although the description of this application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation mode. On the contrary, the purpose of introducing the application in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of this application. In order to provide a deep understanding of the present application, many specific details will be included in the above description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

In the embodiments of the present application, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

In the embodiments of the present application, "and/or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "left", "right", "inside", "outside", etc., are only reference directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (21)

1. A rotating shaft mechanism for foldable electronic equipment, which is characterized by comprising a base (1) and a pair of swing arm assemblies (2) respectively connected to two opposite sides of the base (1), wherein the swing arm assemblies (2) can rotate relative to the base (1) between a folded position and an unfolded position, and when the swing arm assemblies (2) are positioned at the folded position, a supporting surface of each swing arm assembly (2) is positioned at the outer side of each swing arm assembly (2), and the supporting surface is used for supporting a display screen (200) of the foldable electronic equipment;

The swing arm assembly (2) comprises a first swing arm (3), a second swing arm (4), a transmission part (5) and a connecting piece (6) for connecting a shell (300) of the foldable electronic equipment, the first swing arm (3) and the second swing arm (4) are rotatably connected with the base (1), and the first swing arm (3) is slidably connected with the second swing arm (4); the transmission part (5) is rotatably arranged on the second swing arm (4), and the transmission part (5) is connected between the first swing arm (3) and the connecting piece (6);

When the swing arm assembly (2) rotates from the unfolding position to the folding position, the first swing arm (3) slides relative to the second swing arm (4) along a first direction (M1), the transmission part (5) rotates relative to the second swing arm (4), and the connecting piece (6) moves close to the base (1); the first direction (M1) is a direction away from the base (1) or a direction close to the base (1);

when the swing arm assembly (2) rotates from the folded position to the unfolded position, the first swing arm (3) slides relative to the second swing arm (4) along a second direction (M2), the transmission part (5) rotates relative to the second swing arm (4), the connecting piece (6) moves away from the base (1), and the second direction (M2) is opposite to the first direction (M1).

2. The spindle mechanism according to claim 1, wherein,

The transmission part (5) comprises a rotating piece (51), the rotating piece (51) is rotatably connected with the second swing arm (4) through a first rotating shaft (52), the rotating piece (51) is provided with a first connecting part (511) and a second connecting part (512) which are arranged along the circumferential direction of the first rotating shaft (52), the first connecting part (511) is connected with the first swing arm (3), and the second connecting part (512) is connected with the connecting piece (6);

When the first swing arm (3) slides along the first direction (M1) relative to the second swing arm (4), the rotating piece (51) rotates along a first steering direction (R1) relative to the second swing arm (4), the second connecting part (512) gradually approaches the base (1), and the connecting piece (6) moves close to the base (1);

when the first swing arm (3) slides along the second direction (M2) relative to the second swing arm (4), the rotating piece (51) rotates along a second steering direction (R2) relative to the second swing arm (4), the second connecting part (512) is gradually far away from the base (1), and the connecting piece (6) moves far away from the base (1); the second steering (R2) is opposite to the first steering (R1).

3. The spindle mechanism according to claim 2, wherein,

The first connecting part (511) and the second connecting part (512) are respectively positioned at two opposite sides of the first rotating shaft (52).

4. The spindle mechanism according to claim 2, wherein,

The distance from the first connecting portion (511) to the central axis of the first rotating shaft (52) is smaller than the distance from the second connecting portion (512) to the central axis of the first rotating shaft (52).

5. The spindle mechanism according to claim 2, wherein,

The first connecting part (511) and the second connecting part (512) comprise a plurality of teeth which are distributed along the circumferential direction of the first rotating shaft (52), a first rack (30) is fixed on the first swing arm (3), and a second rack (60) is fixed on the connecting piece (6);

-said first rack (30), said second rack (60) each extending in a direction parallel to said first direction (M1); the first rack (30) is engaged with the first connecting portion (511), and the second rack (60) is engaged with the second connecting portion (512).

6. The spindle mechanism according to any one of claims 1 to 5, wherein,

The second swing arm (4) is in sliding connection with the first swing arm (3) through a first sliding structure (71);

The first sliding structure (71) comprises a first sliding groove (72) and a first limiting structure (73), wherein the first sliding groove (72) is arranged on the first swing arm (3) and extends along a direction parallel to the first direction (M1);

The second swing arm (4) comprises a swing arm section (41) rotatably connected with the base (1) and a sliding arm section (42) rotatably connected with the swing arm section (41), and the swing arm section (41) and the sliding arm section (42) are in sliding fit with the first sliding groove (72);

The first limiting structure (73) is used for preventing the sliding arm section (42) from moving relative to the first sliding groove (72) along the groove depth direction of the first sliding groove (72).

7. The spindle mechanism according to claim 6, wherein,

The first limiting structure (73) comprises a first limiting groove (731) and a first protruding part (732), the first limiting groove (731) is arranged on one of the groove side wall of the first sliding groove (72) and the sliding arm section (42), and the first protruding part (732) is arranged on the other of the groove side wall of the first sliding groove (72) and the sliding arm section (42);

The first limiting groove (731) extends along a direction parallel to the first direction (M1), the first limiting groove (731) is provided with two first groove walls (7311) which are arranged along the groove depth direction of the first sliding groove (72), and the first protruding part (732) is arranged between the two first groove walls (7311) in a sliding fit mode.

8. The spindle mechanism according to claim 6, wherein,

The first swing arm (3) is provided with a stop part (31), the sliding arm section (42) is provided with an abutting part (421), the stop part (31) is positioned on one side of the abutting part (421) close to the base (1), and when the swing arm assembly (2) is positioned at the folding position, the abutting part (421) is stopped at the position of the stop part (31).

9. The spindle mechanism according to claim 8, wherein,

The first swing arm (3) comprises two swing parts (32), the two swing parts (32) are arranged at intervals along the length direction (Y) of the base (1), the first sliding groove (72) is positioned between the two swing parts (32), and the stop part (31) connects the two swing parts (32);

One side of the sliding arm section (42) is provided with the transmission part (5), the other side of the sliding arm section (42) is provided with a boss, the boss is the abutting part (421), and the stop part (31) and the abutting part (421) are positioned on the same side of the sliding arm section (42).

10. The spindle mechanism according to any one of claims 1 to 5, wherein,

The second swing arms (4) of the pair of swing arm assemblies (2) are in transmission connection through an even number of gears (74), so that the pair of swing arm assemblies (2) synchronously rotate relative to the base (1) between the folding position and the unfolding position.

11. The spindle mechanism according to any one of claims 1 to 5, wherein,

The connecting piece (6) is in sliding connection with the first swing arm (3), a damping device (91) is arranged on the connecting piece (6), the damping device (91) comprises an elastic component (911) and an abutting joint (912) connected with the elastic component (911), and the elastic component (911) is used for applying elastic force to the abutting joint (912) to enable the abutting joint (912) to abut against the first swing arm (3);

When the connecting piece (6) slides relative to the first swing arm (3) along a direction parallel to the first direction (M1), the abutting joint (912) rubs against the first swing arm (3) to apply a damping force to the connecting piece (6).

12. The spindle mechanism according to claim 11, wherein,

The first swing arm (3) comprises a near end surface (33) arranged near the base (1), a far end surface (34) arranged far from the base (1), and a swing arm side surface (35) connected between the near end surface (33) and the far end surface (34), wherein the swing arm side surface (35) is used for being abutted against the abutting joint (912), a first guide inclined surface (36) is arranged between the swing arm side surface (35) and the far end surface (34), and the first guide inclined surface (36) is obliquely arranged relative to the swing arm side surface (35); when the swing arm assembly (2) is located at the unfolding position, the abutting joint (912) abuts against the first guiding inclined surface (36).

13. The spindle mechanism according to claim 12, wherein,

Be equipped with second direction inclined plane (9121) on butt joint (912), second direction inclined plane (9121) are relative swing arm side (35) slope sets up, when swing arm assembly (2) are located the expansion position, second direction inclined plane (9121) with first direction inclined plane (36) butt.

14. The spindle mechanism according to claim 11, wherein,

The connecting piece (6) is provided with a first accommodating space (64), a second accommodating space (65) and a communication hole (66) which is communicated with the first accommodating space (64) and the second accommodating space (65), the first accommodating space (64) and the second accommodating space (65) are distributed along the length direction of the base (1), the first swing arm (3) stretches into the first accommodating space (64), the elastic component (911) is arranged in the second accommodating space (65), and the abutting joint (912) penetrates through the communication hole (66) to stretch into the first accommodating space (64) and is abutted with the first swing arm (3).

15. The spindle mechanism according to any one of claims 1 to 5, wherein,

The connecting piece (6) is in sliding connection with the first swing arm (3) through a second sliding structure (75);

The second sliding structure (75) comprises a second sliding groove (76), a sliding matching part (77) and a second limiting structure (78), the second sliding groove (76) is arranged on one of the first swing arm (3) and the connecting piece (6), and the sliding matching part (77) is arranged on the other of the first swing arm (3) and the connecting piece (6);

The second sliding groove (76) extends along a direction parallel to the first direction (M1), and the sliding fit part (77) is in sliding fit with the second sliding groove (76); the second limiting structure (78) is used for preventing the sliding fit portion (77) from moving relative to the second sliding groove (76) along the groove depth direction of the second sliding groove (76).

16. The spindle mechanism according to claim 15, wherein,

The second limiting structure (78) comprises a second limiting groove (781) and a second protruding portion (782), the second limiting groove (781) is arranged on one of the groove side wall of the second sliding groove (76) and the sliding fit portion (77), and the second protruding portion (782) is arranged on the other of the groove side wall of the second sliding groove (76) and the sliding fit portion (77);

The second limiting groove (781) extends along a direction parallel to the first direction (M1), the second limiting groove (781) is provided with two second groove walls (7811) which are arranged along the groove depth direction of the second sliding groove (76), and the second protruding portion (782) is arranged between the two second groove walls (7811) in a sliding fit mode.

17. The spindle mechanism according to any one of claims 1 to 5, wherein,

The swing arm assembly (2) further comprises a supporting piece (8), the supporting piece (8) is rotatably connected with the base (1) and is further connected with the connecting piece (6) in a sliding mode, the supporting piece (8) is provided with a first supporting surface (80) which is arc-shaped, the connecting piece (6) is provided with a second supporting surface (61), and the second supporting surface (61) and the first supporting surface (80) form the supporting surface of the swing arm assembly (2).

18. The spindle mechanism according to claim 17, wherein,

The connecting piece (6) comprises a cover plate (63) and a sub-connecting piece (62) detachably connected with the cover plate (63), the second supporting surface (61) is located on the cover plate (63), the sub-connecting piece (62) is connected with the transmission part (5), and the sub-connecting piece (62), the first swing arm (3), the second swing arm (4) and the transmission part (5) are located on one side, deviating from the second supporting surface (61), of the cover plate (63).

19. The spindle mechanism according to any one of claims 1 to 5, wherein,

The swing arm assembly (2) further comprises a shielding piece (92), wherein the shielding piece (92) is located on the back side of the first swing arm (3), the second swing arm (4) and the connecting piece (6), and the shielding piece (92) is fixedly connected with the first swing arm (3).

20. The spindle mechanism according to claim 19, wherein,

The connecting piece (6) is in sliding connection with the shielding piece (92) through a third sliding structure (93);

The third sliding structure (93) comprises a third sliding groove (931) and a third protruding portion (932), the third sliding groove (931) is arranged on one of the connecting piece (6) and the shielding piece (92), and the third protruding portion (932) is arranged on the other of the connecting piece (6) and the shielding piece (92);

The third runner (931) extends in a direction parallel to the first direction (M1), and the third protrusion (932) is in sliding engagement with the third runner (931).

21. A foldable electronic device, comprising a display screen (200), at least two housings (300), and a hinge mechanism (100) according to any one of claims 1 to 20, wherein the housings (300) are configured to carry the display screen (200), the hinge mechanism (100) is located at a junction between two adjacent housings (300), and a pair of swing arm assemblies (2) of the hinge mechanism (100) are respectively connected to the corresponding housings (300).