CN118309718A - Rotating shaft mechanism and electronic equipment - Google Patents

Abstract

The embodiment of the application discloses a rotating shaft mechanism and electronic equipment, wherein the rotating shaft mechanism can be applied to electronic equipment such as mobile phones, tablet computers, tablet computer accessories and wearable equipment, and comprises a rotating shaft base, a sliding part, an elastic part, a first damping swing arm, a second damping swing arm, a first pin shaft and a second pin shaft, wherein the sliding part is arranged in a sliding mode along the direction parallel to an axis, the first damping swing arm and the second damping swing arm are provided with spiral grooves, protruding parts are arranged on two sides of the axis of the sliding part, the spiral grooves and the protruding parts are matched to slide so as to realize synchronous rotation of the first damping swing arm and the second damping swing arm, the protruding parts are always in close fit with the spiral grooves under the action of the elastic part, the synchronous mechanism under the small-size requirements of a folding screen is further reduced in size, the number of parts is reduced, synchronous transmission is stable, and the virtual position quantity is small.

Description

Rotating shaft mechanism and electronic equipment

Technical Field

The present application relates to the field of electronic products, and in particular, to a spindle mechanism and an electronic device.

Background

With the development of flexible screen technology, flexible screens are increasingly used in electronic devices, especially in foldable electronic devices. At present, in order to realize synchronous rotation in the folding or unfolding process, a rotating mechanism is generally adopted, gears are arranged on swing arms at two ends of the rotating mechanism, and the swing arms are respectively meshed with two pinion gears meshed with each other in the middle, so that synchronous movement of swing arms at two ends of a rotating shaft is realized. However, with the development of gradually thinning the folding machine, the space reserved for the rotating shaft is continuously reduced, so that the gear cannot be greatly reduced in size in order to ensure the strength of the meshing teeth, and the conventional gear rotating mechanism cannot meet the synchronous requirement of the rotating shaft at the present stage.

Disclosure of Invention

The application provides a rotating shaft mechanism and electronic equipment, wherein the rotating shaft mechanism comprises a rotating shaft base and a rotating mechanism, and the rotating mechanism is matched with the first swing arm and the second swing arm in a spiral manner through a sliding piece, so that one side of the sliding piece is enabled to swing arm to rotate, the other side of the sliding piece is driven to swing arm to move relatively or oppositely, and further synchronous rotation of a middle frame driven by the swing arm is achieved.

In one aspect, the embodiment of the application provides a rotating mechanism, which is used for enabling the rotating angles of middle frames at two sides of a rotating shaft mechanism relative to the rotating shaft integral base of the rotating shaft mechanism to be approximately consistent in the folding and unfolding process of the rotating shaft mechanism. The rotating mechanism comprises a sliding part, and a first swing arm and a second swing arm which are positioned at two sides of the sliding part, wherein the first swing arm and the second swing arm are respectively used for connecting the middle frames at two sides, and the first swing arm and the second swing arm rotate relative to the integral base of the rotating shaft;

The sliding piece is provided with sliding constraint along the axial direction parallel to the rotation of the first swing arm and the second swing arm; the first swing arm and the second swing arm are split type structures, the first swing arm comprises a first damping swing arm and a first synchronous swing arm, the second swing arm comprises a second damping swing arm and a second synchronous swing arm, the first damping swing arm and the first synchronous swing arm and the second damping swing arm are connected through a pin groove structure and a buckle structure, the first swing arm and the second swing arm are respectively provided with a first groove and a second groove, the sliding part is respectively provided with a first bulge and a second bulge along two sides of a central axis, the first bulge and the second bulge are respectively provided with a first spiral inclined plane and a second spiral inclined plane along two axial end faces, the first groove and the second groove are respectively provided with a third spiral inclined plane and a fourth spiral inclined plane along two axial groove sides, the third spiral inclined plane is matched with the first spiral inclined plane, the fourth spiral inclined plane is matched with the second spiral inclined plane, the first is wound around the first pin shaft along a first rotation position perpendicular to the first swing arm, the first bulge is matched with the second swing arm along a second pin shaft along a second rotation position, and the second bulge is driven by the second pin shaft along a second rotation position perpendicular to the second swing arm.

According to the rotating mechanism provided by the embodiment of the application, the sliding part is arranged, the first protruding part is connected with the first damping swing arm and the first synchronous swing arm to form the first groove, the second protruding part is matched with the second damping swing arm and the second synchronous swing arm to form the second groove, synchronous rotation of the first swing arm and the first swing arm is realized, the rotating mechanism is further reduced in size and reduced in number of parts under the small-size requirement of electronic equipment such as a folding screen, and synchronous transmission is stable and virtual position quantity is small.

Based on one aspect, in one possible implementation manner, the first swing arm rotates around the first pin shaft, the second swing arm rotates around the second pin shaft, and the sliding piece is slidably arranged along the first pin shaft and the second pin shaft. The sliding piece slides along the pin shafts of the first swing arm and the second swing arm, so that the sliding piece does not need to be additionally provided with other sliding constraints, the number of parts is further reduced, and meanwhile, the synchronous virtual position can be reduced.

In another possible implementation manner, the first protruding portion and the second protruding portion are respectively formed with a pin hole, the pin holes form sliding constraint, the first pin shaft and the second pin shaft respectively penetrate through the pin holes to form sliding constraint, the structure is simple, and the sliding fit is stable and reliable.

In another possible implementation manner, the centers of the first and second protruding portions in the thickness direction are located at the same height as the centers of the first and second swing arms. Therefore, when the first swing arm and the second swing arm rotate, the force applied to the sliding piece is symmetrical and equal, so that the risk of jamming of the sliding piece can be reduced, and the hand feeling force is basically symmetrical when the sliding piece rotates positively and negatively, so that the user experience is improved.

In another possible implementation manner, the first damping swing arm and the second damping swing arm are respectively provided with a second sleeve, a third sleeve and a fourth sleeve towards one side of the pin shaft, the first synchronous swing arm and the second synchronous swing arm are respectively provided with a fifth sleeve, the fourth sleeve forms the first groove and the second groove along the axial direction along a spiral inclined plane close to one end of the fifth sleeve and a spiral inclined plane close to the fourth sleeve, and the first pin shaft and the second pin shaft respectively penetrate through the corresponding second sleeve, the corresponding third sleeve, the corresponding fourth sleeve, the corresponding pin hole and the corresponding fifth sleeve, so that space can be fully utilized, and the structure is simplified.

In another possible implementation, the widths of the first and second protrusions are substantially equal to the widths of the first and second grooves in the axial direction, and the widths of the first and second grooves in the axial direction are slightly larger than the widths of the first and second protrusions in the axial direction. Thus, the two can be always interacted without interference to the relative movement of the two.

In another possible implementation manner, the rotating mechanism further includes a slider base, the slider base is disposed on the rotating shaft base, the slider slides on the slider base, a seventh sleeve and a sixth sleeve are respectively disposed on two sides of two ends of the slider base along an axial direction, an accommodating space is formed between the third sleeve and the fourth sleeve on the first damping swing arm and the second damping swing arm, the seventh sleeve is disposed in the accommodating space, and the first pin shaft and the second pin shaft are inserted into the sixth sleeve and the seventh sleeve on corresponding sides. The installation of the first pin shaft and the second pin shaft is realized through the sleeve structure, and the space where the pin shafts are shared with the second sleeve, the third sleeve, the fourth sleeve, the pin holes and the fifth sleeve is beneficial to compact structure.

In another possible implementation, the slider and the slider base are slidingly engaged along the axis direction. The sliding piece is matched with the sliding piece base, so that the sliding stability and reliability are further guaranteed.

In another possible implementation manner, the rotating mechanism further comprises a spring base, a first elastic piece and a cam base, wherein the elastic piece base is fixedly arranged on the rotating shaft base, the first elastic piece and the second elastic piece are pre-pressed and installed between the elastic piece base and the cam base, and the cam base is in butt fit with the first damping swing arm and the second damping swing arm. The elastic piece base is symmetrically provided with first sleeves along two sides of the central axis; cams are symmetrically arranged on the two sides of the central axis of the cam base; one ends of the first elastic piece and the second elastic piece are respectively abutted against the first sleeve on the corresponding side, and the other ends of the first elastic piece and the second elastic piece are respectively abutted against the cam; the two cams are in abutting fit with the two second sleeves on the corresponding sides. The first pin shaft and the second pin shaft are respectively inserted into the two first sleeves and the two cams on the corresponding sides, the first pin shaft penetrates through the first elastic piece, and the second pin shaft penetrates through the second elastic piece. The cam has first concave-convex surface towards the one end face of the second sleeve, the second sleeve has second concave-convex surface towards the one end face of the cam, the first concave-convex surface corresponds to the second concave-convex surface one by one, the first swing arm rotates with the second swing arm, and the first concave-convex surface rotates relative to the second concave-convex surface to provide damping. The first elastic piece and the first swing arm share a first pin shaft, and the second elastic piece and the second swing arm share a second pin shaft. The first elastic piece and the second elastic piece are pressed against the cams on the corresponding sides respectively, so that the two cams are pressed against the first damping swing arm and the second damping swing arm respectively.

The first protruding part is in close fit with the first groove, and the second protruding part is in close fit with the second groove.

In another possible implementation manner, the spring is in a pre-pressed state, the cam has a first concave-convex surface towards one end face of the second sleeve, the second sleeve has a second concave-convex surface towards one end face of the cam, the first concave-convex surface corresponds to the second concave-convex surface one by one, the first swing arm and the second swing arm rotate, and the first concave-convex surface rotates relatively to the second concave-convex surface to provide damping, so that user experience is improved.

In another possible implementation manner, when the sliding piece is worn, the axial force provided by the first elastic piece and the second elastic piece can push the first damping swing arm and the second damping swing arm to move along the axial direction, so that the first damping swing arm and the second damping swing arm are always in a fitting state with the first protruding part and the second protruding part, and further, gaps generated by the sliding piece due to wear are compensated, and further, the synchronous precision of the rotating shaft is improved.

In a second aspect, an electronic device, the electronic device comprising: the electronic equipment comprises a first middle frame, a second middle frame, a flexible screen and the rotating mechanism;

The first middle frame is connected with a first damping swing arm and a first synchronous swing arm in the rotating mechanism, and the second middle frame is connected with a second damping swing arm and a second synchronous swing arm in the rotating mechanism respectively;

The flexible screen overlies the first and second center frames.

In one possible implementation manner, the electronic device further includes a rotating shaft base, and the rotating mechanism, the damping swing arm and the synchronization swing arm are all disposed on the rotating shaft base.

Drawings

FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic view of the rotation mechanism of FIG. 1 mated with a spindle base;

FIG. 3 is an enlarged view of the encircled location of FIG. 2;

FIG. 4 is an exploded view of the rotary mechanism of FIG. 3;

FIG. 5 is a schematic illustration of the engagement of the slider, swing arm and pin of FIG. 4;

FIG. 6 is a schematic diagram of a first swing arm and a second swing arm;

FIG. 7 is an exploded view of the first swing arm and the second swing arm;

FIG. 8 is a schematic view of the back of the first damping swing arm and the first synchronization swing arm of FIG. 5

FIG. 9 is a schematic rear view of the second damping swing arm of FIG. 5 mated with a second synchronizing swing arm;

FIG. 10 is an exploded view of the first damping swing arm and the first synchronization swing arm of FIG. 5;

FIG. 11 is a schematic view of the slider of FIG. 3;

FIG. 12 is an exploded schematic view of the slider, first swing arm and second swing arm of FIG. 5;

FIG. 13 is a schematic view of the slider, pin, and swing arm of FIG. 5 in another state;

FIG. 14 is a schematic view of the slider base, swing arm, and slider assembly of FIG. 3;

FIG. 15 is a schematic view of a slider base;

FIG. 16 is an exploded view of FIG. 14;

FIG. 17 is a top view of the rotation mechanism;

FIG. 18 is a schematic rear view of the rotary machine;

FIG. 19 is a schematic view of another state of the rotating mechanism;

FIG. 20 is a schematic view of another state of the rotating mechanism;

fig. 21 is a schematic diagram of a folding process of the electronic device.

Legend description:

1. a rotation mechanism, 3, a rotation shaft base, 10, a sliding member, 10a, a first spiral inclined surface, 10b, a second spiral inclined surface, 10c, a pin hole, 10d, a spiral protruding portion, 12, a housing space, 13, a fifth sleeve, 13a, a third spiral inclined surface, 17a, a fourth spiral inclined surface, 15, a first sleeve, 15a ¹, a second concave-convex surface, 15a ², a fourth concave-convex surface, 16, a fourth sleeve, 17, a fifth sleeve, 17b, a first stopper, 17b ¹, a second stopper, 18, a first groove, 19, a second groove, 20, a spring base, 20a, a second sleeve, 21, a first elastic member, 22, a second elastic member, 23, a cam base, 23a ¹, a first concave-convex surface, 23a ², third concave-convex surface, 30, slider base, 31, seventh sleeve, 31a, third limit portion, 31b, fourth limit portion, 32, eighth sleeve, 41, pin groove structure, 42, snap structure, 100, middle frame, 121, first pin shaft, 122, second pin shaft, 101, first damping swing arm, 102, second damping swing arm, 111, first synchronization swing arm, 112, second synchronization swing arm, 200, spindle mechanism, 41, pin groove structure, 411, first pin groove, 412, first pin, 413, second pin groove, 414, second pin 42, snap structure, 421, first snap portion, 422, first snap portion, 423, second snap portion, 424, second snap portion.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.

In the description of the present application, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In order to clearly describe the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. For example, the first pin and the second pin are merely for distinguishing different pins, and the sequence of the first pin and the second pin is not limited. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

In the present application, the words "in one embodiment" or "for example" are used to mean an example, illustration, or description. Any embodiment or design described herein as "in one embodiment" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word "in one embodiment" or "for example" is intended to present the relevant concepts in a concrete fashion.

In the present application, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or in contact; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent.

The embodiment of the application provides electronic equipment, which is an exemplary mobile phone. The electronic device includes a flexible folding screen (also referred to as a "flexible display screen") and a hinge mechanism 200, the flexible folding screen being rotatably folded or unfolded by the hinge mechanism 200. Referring to fig. 1, fig. 1 is a schematic diagram of a mobile phone in an unfolded state, showing a hinge mechanism 200 and a middle frame 100, and not showing a flexible folding screen in an embodiment of the application.

The mobile phone comprises a rotating shaft mechanism 200 positioned in the middle and a middle frame 100 positioned at two sides of the rotating shaft mechanism 200, and the flexible folding screen is supported on the middle frames 100 at two sides. In this embodiment, the central axis YY' of the rotating shaft mechanism 200 is used as a reference line to define the left and right, and the middle frame 100 on the left and right sides of the rotating shaft mechanism 200 can rotate relative to the rotating shaft mechanism 200, so as to drive the flexible folding screen to fold or unfold.

The rotating shaft mechanism 200 of the mobile phone in this embodiment further includes a rotating mechanism 1, where the rotating mechanism 1 is used for keeping a rotation angle β of the middle frame 100 on two sides of the rotating shaft mechanism 200 consistent with respect to the rotating shaft mechanism 200 during the folding and unfolding process of the rotating shaft mechanism 200, and the rotation angle β can be understood with reference to fig. 21. It will be appreciated that the rotation angle β of the side center 100 may be offset during rotation due to manufacturing or assembly tolerances. In general, the angular deviation may be in the range of 0 ° to 20, and it is considered that the rotation angle is kept uniform within the angular deviation range.

The rotating mechanism 200 in this embodiment includes a rotating mechanism 1, the specific positions of the rotating mechanism 1 in the rotating mechanism 200 are shown in fig. 2, and fig. 2 illustrates that the rotating mechanism 1 is fixedly mounted on the rotating shaft base 3, and it should be noted that the number of the rotating mechanisms 1 in the rotating mechanism 200 may be plural.

The rotary mechanism 1 in the present embodiment can be understood with reference to fig. 3 to 4, fig. 3 is an enlarged view schematically showing the position a in fig. 2, that is, a structural view of the rotary mechanism 1, and fig. 4 is an exploded view of the rotary mechanism 1 in fig. 3.

The transfer mechanism of the present application includes a first swing arm 11, a second swing arm 12, a slider 10, a first pin 121, and a second pin 122. The rotating mechanism 1 of the present application may further include a slider base 30, where the slider base 30 is used as a base of the rotating mechanism 1, the slider base 30 may be integrally formed with the rotating shaft base 3, the slider base 30 is a part of the rotating shaft base 3, and of course, the slider base 30 may also be two independent components and fixedly connected by a fixing member or other fixing means (such as welding, screw connection, etc.).

In the rotating mechanism of the present application, the slider base 30 is used for mounting the first swing arm 11, the second swing arm 12, the first pin 121, the second pin 122 and the slider 10, the slider base 10 is disposed on the rotating shaft base 3, the first pin 121 and the second pin 122 are disposed on the rotating shaft base 3 in parallel, the length direction of the first pin 121 and the second pin 122 is along the axial direction of the rotating mechanism 1, and the first pin 121 and the second pin 122 may be fixedly connected to the slider base 30, or may be rotatably connected to the slider base 30.

The first swing arm 11 and the second swing arm 12 of the rotating mechanism 1 are connected with the middle frame 100 in this embodiment, and the specific connection mode is not limited, as long as the first swing arm 11 and the second swing arm 12 have a direct or indirect connection relationship with the middle frame 100, the first swing arm 11 and the second swing arm 12 in the present application are respectively sleeved on the first pin 121 and the second pin 122, the first swing arm 11 can rotate around the first pin 121, the second swing arm 12 can rotate around the second pin 122, and correspondingly drive the middle frame 100 to rotate, or the middle frame 100 correspondingly drive the swing arms on the corresponding sides to rotate, that is, have a rotating linkage effect, and the first swing arm 11 and the second swing arm 12 are symmetrically arranged about the central axis YY' of the rotating shaft base 3.

As will be appreciated in connection with fig. 5, fig. 5 is a schematic diagram illustrating the cooperation of the slider, pin and swing arm in fig. 4, and as shown in fig. 5, the vertical direction is also the sliding direction, and is described with reference to the vertical direction indicated in fig. 5. The first swing arm 11 and the second swing arm 12 are symmetrically arranged at the left side and the right side of the central axis YY 'of the sliding member 10, the first swing arm 11 and the second swing arm 12 at the left side and the right side of the sliding member 10 are in a unfolding state, and the central axis YY' of the sliding member 10 is coaxial with the central axis of the rotating shaft mechanism 200. The first swing arm 11 is provided with a sleeve 15 (defined as a first sleeve), a sleeve 16 (defined as a fourth sleeve), a sleeve 13 (defined as a fifth sleeve) and a sleeve 17 (defined as a sixth sleeve) from top to bottom in sequence, the second swing arm 12 and the first swing arm 11 are symmetrically arranged about the central axis YY' of the sliding member 10, it can be understood that the second swing arm 12 is also provided with a sleeve first sleeve 15, a sleeve fourth sleeve 16, a sleeve fifth sleeve 13 and a sleeve sixth sleeve 17 from top to bottom in sequence, the first pin 121 sequentially penetrates through the first sleeve 15, the sleeve fourth sleeve 16, the sleeve fifth sleeve 13, the sliding member 10 and the sleeve sixth sleeve 17 on the first swing arm 101, and the second pin 122 penetrates through the first sleeve 15, the sleeve fourth sleeve 16, the sleeve fifth sleeve 13, the sliding member 10 and the sleeve 17 on the second swing arm 102. The slider 10 is slidably disposed in a direction parallel to the axis of rotation of the first swing arm 101 and the second damping swing arm 102.

It should be further noted that the sleeve structures (including the sleeve 15, the sleeve 16, the sleeve 13, and the sleeve 17) on the first swing arm 101 and the second damping swing arm 102 and the pin hole 10c on the slider 10 mainly limit radial movement to perform axial sliding constraint, and therefore, the sleeve is not limited to be a closed ring shape, and may have a notch.

Continuing to understand with reference to fig. 6-13, fig. 6 is a schematic diagram of a first swing arm and a second swing arm; FIG. 7 is an exploded view of the first swing arm and the second swing arm; FIG. 8 is a schematic view of the first damping swing arm of FIG. 5 connected to a first synchronization swing arm; fig. 9 is a schematic view of the connection of the second damping swing arm and the second synchronization swing arm in fig. 5. Fig. 10 is an exploded view of the connection between the first damping swing arm and the first synchronous swing arm in fig. 5, fig. 11 is an exploded view of the connection between the first damping swing arm and the first synchronous swing arm on the back, fig. 12 is a schematic view of the slider, and fig. 13 is an exploded view of the cooperation between the swing arm and the slider.

In an embodiment of the present application, as shown in fig. 6, the first swing arm 11 is provided with a first groove 18, the first groove 18 has a spiral slope 13a (defined as a third spiral slope) on a side (defined as a first side) of the fifth sleeve 13 facing the sixth sleeve 17 arranged in the direction of the first pin 121, the first groove 18 has a spiral slope 17a (defined as a fourth spiral slope) on a side (defined as a second side) of the fifth sleeve 17 facing the fourth sleeve 13 arranged in the direction of the first pin 121, and the first side and the second side are located in the first axial direction of the first pin 121. The second swing arm 12 is provided with a second groove 19, the second swing arm 12 and the first swing arm 11 are symmetrically disposed about the central axis YY' of the slider 10, it is understood that the second groove 19 has a spiral bevel 13a (defined as a third spiral bevel) on a side (positioned as a first side) of the fifth sleeve 13 disposed along the second pin 122 toward the sixth sleeve 17, and the second groove 19 has a spiral bevel 17a (defined as a fourth spiral bevel) on a side (defined as a second side) of the fifth sleeve 17 disposed along the second pin 122 toward the fourth sleeve 13, the first side and the second side being located on a second axis of the second pin 122.

As shown in fig. 7, the first swing arm 11 and the second swing arm 12 may also be split structures, the first swing arm 11 including a first damping swing arm 101 and a first synchronization swing arm 111 that can be relatively separated, and the second swing arm 12 including a second damping swing arm 102 and a second synchronization swing arm 112 that can be relatively separated. For example, the first damping swing arm 101 and the first synchronization swing arm 111 are two relatively independent components, and the first damping swing arm 101 and the first synchronization swing arm 111 can relatively move along the first axial direction.

Continuing to understand with reference to fig. 8-10, fig. 8 is a schematic diagram of the back connection of the first damping swing arm 101 and the first synchronization swing arm 111; FIG. 9 is a schematic diagram of the back connection of the second damping swing arm 102 and the second synchronization swing arm 112; fig. 10 is an exploded view of the connection of the first damping swing arm 101 and the first synchronization swing arm 111.

In another embodiment of the present application, as shown in fig. 8 and 9, the first damping swing arm 101 and the first synchronization swing arm 111 have a constraint along the first axial direction to enable the first damping swing arm 101 and the first synchronization swing arm 111 to rotate synchronously, and the first damping swing arm 101 and the first synchronization swing arm 111 can be constrained by a constraint structure to be unable to rotate and separate from each other, and the constraint structure can be a pin slot structure and a buckle structure. For example, the first damping swing arm 101 and the first synchronization swing arm 111 are connected by the first pin slot structure 41, and the first damping swing arm 101 and the first synchronization swing arm 111 may also be connected by the pin slot structure 41 and the snap structure 42. Specifically, the pin slot structure 41 is used to limit the relative rotation of the first damping swing arm 101 and the first synchronization swing arm 111 in the process of rotating around the first pin 121, so that the rotation included angle of the first damping swing arm 101 and the first synchronization swing arm 111 in the process of rotating is kept consistent with respect to the first pin 121. The function of the fastening structure 42 is to limit the first damping swing arm 101 and the first synchronization swing arm 111 to generate relative separation along the pin axis direction in the process of rotating around the first pin axis 121, so that the first damping swing arm 101 and the first synchronization swing arm 111 are connected into a whole in the process of rotating around the first pin axis 121, and rotate around the first pin axis 121 together. It can be understood that the second swing arm 12 and the first swing arm 11 are symmetrically arranged, and the connection manner between the second damping swing arm 102 and the second synchronization swing arm 112 can be understood by referring to the connection manner between the first damping swing arm 101 and the first synchronization swing arm 111.

In this example, as shown in fig. 10, taking an example that the first damping swing arm 101 is connected to the first synchronization swing arm 111, the connection structure of the first damping swing arm 101 and the first synchronization swing arm 111 includes a first pin slot 411 and a first pin 412, the first pin 411 is engaged with the first pin 411 in an axial direction parallel to the first pin 121, the first pin 412 is inserted into the first pin slot 411, and the first damping swing arm 101 and the first synchronization swing arm 111 are restricted from rotating in different directions by the engagement of the first pin 412 and the first pin slot 411, so that the first damping swing arm 101 and the first synchronization swing arm 111 rotate synchronously. The connection modes of the second damping swing arm 102 and the second synchronous swing arm 112 and the connection mode of the first damping swing arm 101 and the first synchronous swing arm 111 are the same, the connection structure of the second damping swing arm 102 and the second synchronous swing arm 112 comprises a second pin groove 413 and a second pin column 414, the second pin column 414 is matched with the second pin groove 413 in the axial direction parallel to the second pin shaft 122, the rotation directions of the first main swing arm 102 and the second synchronous swing arm 112 are limited to be different, the second damping swing arm 102 and the second synchronous swing arm 112 can synchronously rotate, meanwhile, the thickness of the swing arm is not increased in the Z direction through the assembly mode, and the whole structure is lighter and thinner.

The connection structure of the first damping swing arm 101 and the first synchronization swing arm 111 further includes a first clamping portion 421 and a first buckling portion 422, the first clamping portion 422 is matched with the first buckling portion 421 on a plane perpendicular to the first damping swing arm 101, and the first damping swing arm 101 and the first synchronization swing arm 111 are limited to be separated through the matching of the first clamping portion 421 and the first buckling portion 422. The second damping swing arm 102 is the same with the buckle connection structure of the second synchronous swing arm 112, the connection structure of the second damping swing arm 102 and the second synchronous swing arm 112 further comprises a second clamping portion 423 and a second buckling portion 424, the second clamping portion 423 is matched with the second buckling portion 424 on a plane perpendicular to the second damping swing arm 102, the second clamping portion 423 is matched with the second buckling portion 424 to limit the separation of the second damping swing arm 102 and the second synchronous swing arm 112, meanwhile, the thickness of the swing arm can not be increased in the Z direction through the assembly mode, and the whole structure is lighter and thinner.

The first pin slot 411 and the second pin slot 413 in the pin slot structure 41 may be long slots with notches, or may be cylindrical holes with a certain depth, or may be other shapes, which is not particularly limited herein. The shapes of the first pin 412 and the second pin 414 in the pin slot structure 41 may be cylindrical, or prismatic, and in particular, may be other shapes, which are not limited in the present application, so long as the first pin slot 411 and the first pin 412 and the second pin slot 413 and the second pin 414 can cooperate with each other, so as to limit the rotation directions of the first damping swing arm 101 and the first synchronization swing arm 111, and the second damping swing arm 102 and the second synchronization swing arm 112 from being different.

The shapes of the first locking portion 421 and the second locking portion 423 in the locking structure 42 may be rectangular, square or other shapes, and the shapes of the first locking portion 422 and the second locking portion 424 in the locking structure 42 may also be rectangular, square or other shapes, so long as the first locking portion 421 and the first locking portion 422 can be mutually matched, the second locking portion 423 and the second locking portion 424 can be mutually matched, and the first damping swing arm 101 and the first synchronization swing arm 111 and the second damping swing arm 102 and the second synchronization swing arm 112 can be limited to be mutually separated.

In the embodiment of the present application, as shown in fig. 11, the sliding member 10 is symmetrically provided with a first protruding portion 10d and a second protruding portion 10d ¹ along two sides of the central axis YY ', and the first protruding portion 10d and the second protruding portion 10d ¹ are symmetrically provided with respect to the central axis YY' of the sliding member 10. The first protruding portion 10d and the first swing arm 11 are sleeved on the first pin shaft 121, and the second protruding portion 10d ¹ and the second swing arm 12 are sleeved on the second pin shaft 122. The first protruding portion 10d is provided with a first pin hole 10c, the second protruding portion 10d ¹ is provided with a second pin hole 10c ¹, the first pin shaft 121 passes through the first pin hole 10c, the second pin shaft 122 passes through the second pin hole 10c ¹, the first pin shaft 121 passes through the first swing arm 11 and the first protruding portion 10d, and the second pin shaft 122 passes through the second swing arm 12 and the second protruding portion 10d ¹. The first protruding portion 10d is provided with a first end face and a second end face along the first axial direction, the first end face is formed with a first spiral bevel 10a, the second end face is formed with a second spiral bevel 10b, similarly, the second protruding portion 10d ¹ is also provided with the first end face and the second end face along the second axial direction, the first end face of the second protruding portion is formed with a first spiral bevel 10a ¹, and the second end face of the second protruding portion is formed with a second spiral bevel 10b ¹

With continued reference to fig. 12, the first damping swing arm 101 and the second damping swing arm 102 are symmetrically arranged about the central axis YY ' of the slider 10, the first synchronization swing arm 111 and the second synchronization swing arm 112 are symmetrically arranged about the central axis YY ' of the slider 10, and the slider 10 is attached to the first damping swing arm 101, the second damping swing arm 102, the first synchronization swing arm 111, and the second synchronization swing arm 112 along the YY '. The first end of the first protrusion 10d of the slider 10 is screw-engaged with the first side of the first groove 18, and the second end of the first protrusion 10d of the slider 10 is screw-engaged with the second side of the first groove 18. The first end of the second protrusion 10d ¹ of the slider 10 is screw-engaged with the first side of the second groove 19, and the second end of the second protrusion 10d ¹ of the slider 10 is screw-engaged with the second side of the second groove 19. Specifically, the first spiral inclined surface 10a of the first protruding portion 10d of the slider 10 is spirally attached to the first damping swing arm 101 toward the third spiral inclined surface 13a on the slider 10, and the second spiral inclined surface 10b of the first protruding portion 10d of the slider 10 is spirally attached to the first synchronization swing arm 111 toward the fourth spiral inclined surface 17a of the slider 10. The engagement of the first spiral inclined surface 10a of the first protruding portion 10d with the third spiral inclined surface 13a of the first damping swing arm 101 and the second spiral inclined surface 10b of the second protruding portion 10d ¹ with the fourth spiral inclined surface 17a of the first synchronization swing arm 111 can improve the synchronization accuracy of the rotation of the second swing arm 12 driven by the slider 10 when the first swing arm 11 rotates around the first pin 121. The fitting manner of the first spiral inclined surface 10a ¹ and the second spiral inclined surface 10b ¹ on the two end surfaces of the second protruding portion 10d ¹ of the sliding member 10 with the second damping swing arm 102 and the second synchronization swing arm 112 can be understood by referring to the fitting manner of the first spiral inclined surface 10a and the second spiral inclined surface 10b of the first protruding portion 10d of the sliding member 10 with the first damping swing arm 101 and the first synchronization swing arm 111, and the fitting manner is the same and is not repeated herein.

It will be appreciated that the first pin 121 passes through the first sleeve 15 on the first damping swing arm 101, the fourth sleeve 16 on the first damping swing arm 101, the fifth sleeve 13 on the first damping swing arm 101, the first pin hole 10c, the sixth sleeve 17 on the first synchronization swing arm 111 in sequence, and the second pin 122 passes through the first sleeve 15 on the second damping swing arm 102, the fourth sleeve 16 on the second damping swing arm 102, the fifth sleeve 13 on the second damping swing arm 102, the pin hole 10c ¹, and the sixth sleeve 17 at the lower end of the second synchronization swing arm 112 in sequence.

In the embodiment of the present application, as shown in fig. 13, fig. 13 is a schematic diagram illustrating a rotation intermediate state of the first swing arm 11 and the second swing arm 12, specifically, in a process of rotating the first swing arm 11 and the second swing arm 12 from the first position to the second position, for example, in a process of rotating the first swing arm 11 from the flattened state to the state shown in fig. 13, the first swing arm 11 rotates around the first pin 121 along a direction opposite to the second pin 122, the first groove 18 rotates along with the first groove, the third spiral inclined surface 13a matched with the first protruding portion 10d and the fourth spiral inclined surface 17a matched with the first protruding portion 10d also rotate along with the first groove, the third spiral inclined surface 13a can generate a pressing force on the first protruding portion 10d during the rotation, and the pressing force of the third spiral inclined surface 13a on the first protruding portion 10d pushes the slider 10 to move downward along the first pin 121, and the fourth spiral inclined surface 17a matched with the first protruding portion 10d rotates along with the first pin 121 during the downward movement of the slider 10, so that the fourth spiral inclined surface 17a is matched with the first protruding portion 10d to move downward along with the first protruding portion 111 to provide a space for the swing arm 10 d. Meanwhile, when the sliding member 10 moves downwards along the first pin 121, the second protrusion 10d ¹ on the other side of the sliding member 10 will press the fourth spiral inclined surface 17a on the second side of the second groove 19, the pressing will generate a pressure perpendicular to the fourth spiral inclined surface 17a, the pressure decomposition will provide a component force perpendicular to the second pin 122 towards the first pin 121, the component force drives the second synchronous swing arm 112 to rotate around the second pin 122, so that the first swing arm 11 rotates around the first pin 121 along the direction opposite to the second pin 122, drives the second swing arm 12 to rotate around the second pin 122 along the direction opposite to the first pin 121, the first swing arm 11 drives the sliding member 10 to move downwards through the spiral cooperation of the first groove 18 and the first protrusion 10d, and when the sliding member 10 moves downwards, the second swing arm 12 is driven to rotate around the second pin 122 through the spiral cooperation of the second protrusion 10d ¹ and the second groove 19, so as to realize the effect of synchronous rotation of the two sides of the sliding member 10 and the second swing arm 122. Similarly, the second damping swing arm 102 and the first damping swing arm 101 are symmetrically arranged about the central axis YY 'of the sliding member 10, and the second synchronization swing arm 112 and the first synchronization swing arm 111 are symmetrically arranged about the central axis YY' of the sliding member 10, so that when the second swing arm 12 rotates around the second pin 122 along the direction opposite to the first pin 121, the second damping swing arm can be understood by referring to the first swing arm 11 rotating around the first pin 121, and the action principle of the second damping swing arm and the first synchronization swing arm is the same in the rotation process.

Specifically, when the first swing arm 11 rotates from the second position to the first position, for example, from the state shown in fig. 13 to the flattened state, the first swing arm 11 rotates around the first pin 121 in a direction away from the second pin, the third spiral inclined surface 13a and the fourth spiral inclined surface 17a corresponding to the first protruding portion 10d rotate along with the first pin, the fourth spiral inclined surface 17a can generate a pressing force on the first protruding portion 10d during rotation, the pressing force of the fourth spiral inclined surface 17a on the protruding portion 10d pushes the slider 10 to move upward along the first pin 121, and the third inclined surface 13a matched with the first protruding portion 10d rotates along with the protruding portion 10d during the upward movement of the slider 10 along the first pin 121, so that the third spiral inclined surface 13a provides an avoidance space for the upward movement of the protruding portion 10d along with the rotation of the first damping swing arm 101. Meanwhile, when the sliding member 10 moves upwards along the first pin shaft 121, the second protrusion 10d ¹ of the sliding member 10 will press against the third spiral inclined surface 13a on the first side of the second groove 19, the pressing force will generate a pressure perpendicular to the third spiral inclined surface 13a, the pressure will decompose a component force perpendicular to the second pin shaft 122 and deviating from the direction of the first pin shaft 121, the component force drives the second damping swing arm 112 to rotate around the second pin shaft 122 in the direction deviating from the first pin shaft 121, thereby realizing the rotation of the first swing arm 11 around the first pin shaft 121 in the direction deviating from the second pin shaft 122, driving the second swing arm 12 to rotate around the second pin shaft 122 in the direction deviating from the first pin shaft 121, and the first swing arm 11 drives the sliding member 10 to move upwards through the spiral cooperation of the first groove 18 and the first protrusion 10d ¹ and the second groove 19, and driving the second swing arm 12 to rotate around the second pin shaft 122 when the sliding member 10 moves upwards, so as to realize the synchronous rotation effect of the first swing arm 11 and the second swing arm 12 on both sides of the first swing arm 12. Similarly, the second damping swing arm 102 and the first damping swing arm 101 are symmetrically arranged about the central axis YY 'of the sliding member 10, and the second synchronization swing arm 112 and the first synchronization swing arm 111 are symmetrically arranged about the central axis YY' of the sliding member 10, so that when the second swing arm 12 rotates around the second pin shaft 122 in a direction deviating from the first pin shaft 121, it can be understood by referring to the first swing arm 11 rotating around the first pin shaft 121 in a direction deviating from the second pin shaft 122, and the action principle of the two rotation processes is the same.

The embodiment of the application realizes that the first swing arm 11 rotates around the first pin shaft 121 to drive the second swing arm 12 to rotate around the second pin shaft 122 based on the matching of the first protruding part 10d of the sliding part 10 and the first groove 18 of the first swing arm 11 and the second protruding part 10d ¹ of the second swing arm 12, thereby realizing the synchronous rotation of the first swing arm 11 and the second swing arm 12 on the two sides of the central axis YY' of the sliding part 10, and compared with the synchronous structure of a gear set, the size of the rotating mechanism under the small-size requirement of the folding electronic equipment can be further reduced, the synchronous movement of the first swing arm 11 and the second swing arm 12 on the two sides of the rotating mechanism 1 can be realized only by one sliding part 10, the manufacturing is simpler, and meanwhile, the synchronous transmission is stable and the reliability is higher.

It should be noted that, the first pin shaft 121 and the second pin shaft 122 respectively pass through the first pin hole 10c and the second pin hole 10c ¹ on two sides of the central axis YY 'of the sliding member 10, the first swing arm 11 rotates around the first pin shaft 121, and the second swing arm 12 rotates around the second pin shaft 122, that is, the first pin hole 10c and the second pin hole 10c ¹ on two sides of the central axis YY' of the sliding member 10 are respectively concentric with the first pin shaft 121 and the second pin shaft 122, and share the same shaft member, that is, share the first pin shaft 121 and the second pin shaft 122, so that the synchronism is better, and parts and space can be saved.

In the embodiment of the application, in the process of rotating the first swing arm 11 and the second damping swing arm 12 around the first pin shaft 121 and the second pin shaft 122, the first protruding part 10d and the second protruding part 10d ¹ of the sliding part 10 can be respectively and tightly matched with the first groove 18 and the second groove 19 along the axial direction all the time, and the first spiral inclined surface 10a and the second spiral inclined surface 10b of the first protruding part 10d are tightly matched with the first damping swing arm 101 and the third spiral inclined surface 13a and the fourth spiral inclined surface 17a on the first synchronous swing arm 111 along the axial direction all the time, the first spiral inclined surface 10a and the second spiral inclined surface 10b of the second protruding part 10d ¹ are tightly matched with the second damping swing arm 102 and the spiral inclined surface 14 on the second synchronous swing arm 112 along the axial direction all the time, so that the linkage effect of rotating the sliding part 10 and the first groove 11 and the second swing arm 12 can be formed when the first swing arm 11 rotates around the first pin shaft 121 or the second swing arm 12, and the first groove 18 and the second swing arm 11 and the second swing arm 12 can be better matched with the first swing arm 10d and the second swing arm 10 can be more stably and synchronously matched.

In the embodiment of the present application, the first protrusion 10d on one side of the central axis YY 'of the slider 10 is inserted into the first groove 18 formed by the first damping swing arm 101 and the first synchronization swing arm 111, the second protrusion 10d ¹ of the slider 10 is inserted into the second groove 19 formed by the second damping swing arm 102 and the second synchronization swing arm 112, and the nature of the interaction between the first protrusion 10d and the second protrusion 10d ¹ on both sides of the central axis YY' of the slider 10 and the first groove 18 and the second groove 19 is that when the first groove 18 rotates with the first damping swing arm 101, the first synchronization swing arm 111 and the second groove 19 rotates with the second damping swing arm 102 and the second synchronization swing arm 112, the parts of the first groove 18 and the second groove 19 facing the first protrusion 10d and the second protrusion 10d ¹ are changed in axial positions, and the groove sides of the first groove 18 and the second groove 19, that is, the third spiral inclined surface 13a and the fourth spiral inclined surface 17a, push the first protrusion 10d and the second protrusion 10d ¹, and then drive the slider 10 to move in axial directions, whereas when the slider 10 moves in axial directions, the first protrusion 10d and the second protrusion 10d ¹ on the corresponding sides push the third spiral inclined surface 13a and the fourth spiral inclined surface 17a on the corresponding sides, and at this time, the first groove 18 and the second groove 19 are also rotated to be adjusted to the corresponding positions and the first protrusion 10d and the second protrusion 10d ¹ maintain the spiral close fitting relationship. Therefore, the width of the first protrusion 10d and the second protrusion 10d ¹ along the YY 'direction should be substantially equal to the width of the first groove 18 and the second groove 19 along the YY', and the width of the first protrusion 10d and the second protrusion 10d ¹ may be slightly smaller than the width of the first groove 18 and the second groove 19, so that the two can always interact without interfering with the relative movement of the two.

With continued reference to fig. 14 to 16, fig. 14 is a schematic diagram illustrating the cooperation of the swing arm, the slider and the slider base; fig. 15 is a schematic view of a slider base, and fig. 16 is an exploded schematic view of the swing arm, the slider and the slider base.

As shown in fig. 14, the rotating mechanism 1 according to the embodiment of the present application further includes a slider base 30, the slider base 30 is fixedly mounted on the rotating shaft base 3, a first side of the slider base 30 is fixed on the rotating shaft base, and a second side of the slider base 30 away from the rotating shaft base 30 is mounted with the slider 10, and the slider base 30 is used as a base of the rotating mechanism 1 for mounting the first swing arm 11, the second swing arm 12, the first pin 121, and the second pin 122. The first pin 121 and the second pin 122 are fixedly connected with the slider base 30, alternatively, the first pin 121 and the second pin 122 may also be rotatably connected with the slider base 30, the rotation axes of the first pin 121 and the second pin 122 are consistent with the rotation axes of the first swing arm 11 and the second swing arm 12, the first swing arm 11 and the second swing arm 12 are in rotation fit with the slider base 30, and the first swing arm 11 and the second swing arm 12 may rotate relative to the slider base 30.

As shown in fig. 15, two sleeves 32 (defined as eighth sleeves) and two sleeves 31 (defined as seventh sleeves) are respectively provided at the upper and lower ends of the slider base 30, the two eighth sleeves 32 are symmetrically disposed about the slider central axis YY ', and the two sixth sleeves 31 are symmetrically disposed about the slider central axis YY'. The first pin 121 and the second pin 122 are inserted into the seventh sleeve 31 and the eighth sleeve 32 on the corresponding sides, respectively, and the first pin 121 and the second pin 122 are constrained by the slider base 30, and the seventh sleeve 31 and the eighth sleeve 32 may have notches as long as limiting can be performed. The seventh sleeve 31 located in the first axial direction is provided with a third limit portion 31a extending toward one end of the eighth sleeve 32 in the first axial direction, and the seventh sleeve 31 located in the second axial direction is provided with a fourth limit portion 31b extending toward one end of the eighth sleeve 32 in the second axial direction. The third limiting portion 31a of the first axial eighth sleeve 32 is configured to cooperate with the first synchronization swing arm 111, and the fourth limiting portion 31 of the second axial eighth sleeve 32 is configured to cooperate with the second synchronization swing arm 112.

As shown in fig. 16, the first damping swing arm 101 is sequentially provided with a first sleeve 15, a fourth sleeve 16 and a fifth sleeve 13 along the first axial direction, wherein a containing cavity 25 (defined as a first containing cavity) is formed between the sixth sleeve 16 and the fifth sleeve 13, and the second damping swing arm 102 is also sequentially provided with the first sleeve 15, the fourth sleeve 16 and the fifth sleeve 13 along the second axial direction, wherein a containing cavity 26 (defined as a second containing cavity) is also formed between the fourth sleeve 16 and the fifth sleeve 13. The first receiving cavity 25 formed on the first damping swing arm 101 and the second receiving cavity 26 formed on the second damping swing arm 102 are symmetrically arranged with respect to the central axis YY' of the slider base 30. The eighth sleeve 32 of the slider base 30 along the first axial direction is installed in the first accommodating cavity 25 on the first damping swing arm 101, the eighth sleeve 32 on the right side of the upper end of the slider 30 is installed in the second cavity 26 on the second damping swing arm 102, and the lengths of the eighth sleeves 32 on the left and right sides of the upper end of the slider base 30 along the Y direction are smaller than the lengths of the first accommodating cavity 25 and the second accommodating cavity 26 along the Y direction.

The first stop portion 17b is extended toward one end of the seventh sleeve 31 of the first swing arm 111, which is disposed along the first axial direction, toward the slider base 30, and the second stop portion 17b ¹ is extended toward one end of the seventh sleeve 31 of the second swing arm 112, which is disposed along the second axial direction, toward the slider base. The first limiting portion 17b cooperates with the third limiting portion 31a of the first axial direction of the slider base 30 to limit the first swing arm 111 from exceeding the plane of the second side of the slider base 30 when rotating around the first pin 121, and limit the unfolding angle of the first swing arm 111 relative to the slider base 30. The second limiting portion 17b ¹ is in abutting fit with the fourth limiting portion 31b of the second shaft of the slider base 30, so that the second synchronous swing arm 112 is limited not to exceed the plane of the second side of the slider base 30 when rotating around the second pin 122, and the unfolding angle of the second synchronous swing arm 112 relative to the slider base 30 is limited, so that excessive rotation of the middle frames on two sides of the rotating shaft is limited, in a state that the middle frames on two sides of the rotating shaft are fully unfolded, the first limiting portion 17b is in abutting state with the third limiting portion 31a, the second limiting portion 17b ¹ is in abutting state with the fourth limiting portion 31b, and the first swing arms 11 and the second swing arms 12 on two sides of the slider base 30 cannot continue to rotate in the unfolding direction.

With continued reference to fig. 17-21, fig. 17 is a top view of the rotation mechanism 1 in an expanded state; fig. 18 is an enlarged schematic view of the cam 23a of the rotating mechanism 1 engaged with the swing arm; fig. 19 is another enlarged schematic view of the cam 23a of the rotating mechanism 1 cooperating with the swing arm; FIG. 20 is an expanded back schematic view of the rotary mechanism 1; fig. 21 is a schematic view of the rotation process of the rotation mechanism 1.

Preferably, as shown in fig. 17, the rotating mechanism 1 of the embodiment of the present application further includes a spring base 20, a first elastic member 21, a second elastic member 22, and a cam base 23, where the spring base 20 is fixed on the rotating shaft base 3, the spring base 20 is symmetrically provided with second sleeves 20a along two sides of a central axis YY ', the cam base is symmetrically provided with a first cam 23a and a second cam 23a along two sides of the central axis YY' along 23, the first cam 23a is in abutting engagement with the first swing arm 11, and the second cam 23a is in abutting engagement with the second swing arm 12. The first elastic member 21 and the second elastic member 22 are disposed between the spring base 20 and the cam base 23, and the first elastic member 21 and the second elastic member 22 are symmetrically disposed about the central axis YY'.

An end surface of the first cam 23a facing away from the first elastic member 21 is in abutting fit with an end surface of the first damping swing arm 101 facing the first cam 23a, and an end surface of the second cam 23a facing away from the second elastic member 21 is in abutting fit with an end surface of the second damping swing arm 101 facing the second cam 23 a. The first cam 23a presses the first damping swing arm 101 under the action of the axial force along the first axial direction provided by the first elastic member 21, so that the first groove 18 of the first swing arm 11 is tightly fitted with the first protruding portion 10d of the sliding member 10, and the second cam 23a presses the second damping swing arm 102 under the action of the axial force along the second axial direction provided by the second elastic member 22, so that the second groove 19 of the second swing arm 12 is tightly fitted with the second protruding portion 10d ¹ of the sliding member 10.

As shown in fig. 18, preferably, the first damping swing arm 101 and the first and second swing arms 111 and 102 are connected to the second swing arm 112 through the pin groove structure 41 and the snap structure 42, the first pin 412 is inserted into the first pin groove 411, the second pin 414 is inserted into the second pin groove 413, and the first pin 412 and the first pin groove 411 are provided with a gap (referred to as a gap 1) at the time of assembly. The first fastening portion 421 is fastened to the first fastening portion 422, the second fastening portion 423 is fastened to the second fastening portion 424, a gap (referred to as a gap 2) is provided between the first fastening portion 421 and the first fastening portion 422 during assembly, and the gap 1 and the gap 2 can be adjusted as required, for example, the gap 1 and the gap 2 can range from 0.1mm to 0.3 mm.

In the embodiment of the application, the first elastic member 21 and the second elastic member 22 are in a pre-pressing state, when the sliding member 10 slides relative to the sliding member base 30 and is rubbed against the first groove 18 and the second groove 19 to generate abrasion, the axial force provided by the first elastic member 21 and the second elastic member 22 can push the first damping swing arm 101 to move along the axial direction of the first pin shaft 121 and the second damping swing arm 102 along the axial direction of the second pin shaft 122, the first damping swing arm 101 moves towards the first synchronous swing arm 111, the second damping swing arm 102 moves towards the second synchronous swing arm 112, the gap 1 and the gap 2 are further reduced, the fixing effect of the sliding member base 30 ensures that the first swing arm 11, the sliding member 10 and the second swing arm are always in a close-fitting state, and the elastic force provided by the first elastic member 101 and the second elastic member 22 can compensate the gap 1 and the gap 2 between the first damping swing arm 111 and the second damping swing arm 102 and the second synchronous swing arm 112 through the pin groove structure 41 and the gap 12 of the fastener structure 42, so that the elastic member 21 and the second elastic member 22 can compensate the elastic member provided by the sliding member 10 and the first synchronous swing arm 111 and the second synchronous swing arm 111, thereby the gap 1 and the gap 2 can be rotated, and the rotating precision of the sliding member can be guaranteed when the sliding member base rotates and the sliding member base rotates, and the two sides of the swing arm base rotates, and the sliding member rotates, and the gap 1 is guaranteed, and the accuracy is increased.

In the embodiment of the application, the first pin 121 sequentially passes through the second sleeve 20a, the first elastic member 21, the first cam 23a, the first swing arm 11, the first protruding portion 10d of the sliding member 10 and the sliding member base 30, the second pin 122 sequentially passes through the second sleeve 20a, the second elastic member 22, the second cam 23b, the second swing arm 12, the second protruding portion 10d ¹ of the sliding member and the sliding member base 30, the first elastic member 21 shares the first pin 121 with the first swing arm 11, the second elastic member 22 shares the second pin 122 with the second swing arm 12, and when the axial force provided by the first elastic member 21 pushes against the axial force provided by the first damping swing arm 101 and the second elastic member 22 pushes against the second damping swing arm 102, no additional torque is generated by the first swing arm 11 and the second swing arm 12 in the rotating process, and friction between the first pin 11 and the first swing arm 121 and between the second swing arm 12 and the second pin 122 is reduced.

As shown in fig. 19, the first cam 23a of the cam base 23 is provided with a first concave-convex surface 23a ¹ away from an end surface of the first elastic member 21, and the first sleeve 15 of the first damping swing arm 101 is provided with a second concave-convex surface 15a ¹ toward an end surface of the first cam 23a, and the first concave-convex surface 23a ¹ is engaged with the second concave-convex surface 15a ¹. The second cam 23a is provided with a third concave-convex surface 23a ² away from an end surface of the second elastic member 22, the second damping swing arm 102 is provided with a fourth concave-convex surface 15a ² on an end surface of the first sleeve 15 facing the second cam 23a, and the third concave-convex surface 23a ² is matched with the fourth concave-convex surface 15a ².

In the embodiment of the present application, the first elastic member 21 and the second elastic member 22 are in a pre-pressed state, the first elastic member 21 presses the first cam 23a against the first damping swing arm 101, so that the first concave-convex surface 23a ¹ is matched with the second concave-convex surface 15a ¹ on the first damping swing arm 101, the second elastic member 22 presses the second cam 23a against the second damping swing arm 102, The third concave-convex surface 23a ² on the second cam 23a is mated with the fourth concave-convex surface on the second damping swing arm 102. For example, as shown in FIG. 20, when the rotation mechanism 1 is rotated from the state of FIG. 19 to the state of FIG. 20 while the first swing arm 11 is rotated about the first pin 121 and the second swing arm 12 is rotated about the second pin 122, the third concave-convex surface 23a ² of the second cam 23a and the fourth concave-convex surface 15a ² of the second damping swing arm 102 are rotated from the mutually engaged state to the mutually abutted state, In the rotating process, the third concave-convex surface 23a ² of the second cam 23a generates sliding friction with the fourth concave-convex surface 15a ² of the second damping swing arm, the second cam 23a generates rotating resistance to the second damping swing arm 102 around the second pin shaft 122, so that the second damping swing arm 102 generates damping in the rotating process around the second pin shaft 122, so that the second swing arm 12 can hover at a certain position in the rotating process around the second pin shaft 122, the middle frame connected with the second swing arm 12 can be more smooth in the opening and closing process. Similarly, the first concave-convex surface 23a ¹ of the first cam 23a and the second concave-convex surface 15a ¹ of the first damping swing arm 101 rotate from the mutually matched state to the mutually abutting state, and during the rotation, the first concave-convex surface 23a ¹ of the first cam 23a generates sliding friction with the second concave-convex surface 15a ¹ of the first damping swing arm 101, the first cam 23a generates a rotation resistance to the first damping swing arm 101 around the first pin 121, so that damping is generated in the process of rotating the first damping swing arm 101 around the first pin 121.

In this embodiment, the number of the first elastic members 21 and the second elastic members 22 is not limited to one, and may be plural, so long as the first damping swing arm 101 and the second damping swing arm 102 can be provided with axial force, so that the first damping swing arm 101, the second damping swing arm 102, the first synchronous swing arm 111, the second synchronous swing arm 112 and the sliding member 10 are always in a close-contact state in the process of rotating. On the other hand, the cam base 23, the first elastic member 21 and the second elastic member 22 in the present embodiment may be mounted at one end of the slider base 30, or the cam base 23, the first elastic member 21 and the second elastic member 22 may be mounted at both the upper end and the lower end of the rotation mechanism 1, to provide damping for the rotation mechanism 1 during rotation and to compensate for the wear gap generated during sliding of the slider 10.

In this embodiment, the elastic force provided by the first elastic member 21 and the second elastic member 22 not only can compensate the gap generated by friction in the sliding process of the sliding member 10, but also can provide damping for the swing arm in the rotating process. In this embodiment, through the mutual cooperation of the spring base 20, the cam base 23, the first elastic member 21, the second elastic member 22, the first swing arm 11, the second swing arm 12, and the sliding member 10 and the sliding member base 30, synchronous movement of the first swing arm 11 and the second swing arm 12 at two sides of the rotating mechanism 1 can be realized, the axial force provided by the first elastic member 21 and the second elastic member 22 can also compensate the gap generated by abrasion of the sliding member 10, so as to improve the synchronous precision of the rotating mechanism, and the axial center of the first elastic member 21 is the same as the axial center of the rotating shaft of the first swing arm 11, and the axial center of the second elastic member 22 is the same as the axial center of the rotating shaft of the second swing arm 12, so that the first swing arm 11 and the second swing arm 12 cannot generate additional torque in the rotating process, and the axial force provided by the first elastic member 21 and the second elastic member 22 can also provide a certain damping for the rotating shaft.

Fig. 21 illustrates a process of implementing synchronous rotation of middle frames at two sides of a rotating mechanism through the rotating mechanism 1, specifically, as shown in fig. 21, the middle frame 100 at one side rotates relative to the rotating shaft base 3 under an external force F, a swing arm connected with the middle frame 100 rotates along with the rotation of the middle frame, the swing arm rotates to drive a sliding part 10 in the rotating mechanism 1 to axially move, the movement of the sliding part 10 also counteracts the swing arm at the other side of the central axis of the sliding part 10 to drive the swing arm at the other side to rotate along with the rotation of the swing arm, and the swing arm at the other side drives the middle frame 100 connected with the swing arm to rotate, so that the rotation included angles of the swing arms at two sides of the rotating shaft relative to the rotating shaft base are nearly consistent.

The above embodiments are mainly described with respect to a folding screen mobile phone, and it is known that the present invention is not limited to a folding screen mobile phone, but may be applied to other electronic devices, such as a tablet computer, a notebook computer, a wearable device, a vehicle-mounted device, an Augmented Reality (AR)/Virtual Reality (VR) device, an ultra-mobile personal computer, a mobile terminal such as an internet protocol (UMPC), a personal digital assistant (personal DIGITAL ASSISTANT, a PDA), or a professional photographing device such as a digital camera, a single/micro camera, a motion video camera, a pan-tilt camera, a drone, etc., as long as the electronic devices have requirements of relatively synchronous rotation.

The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims (16)

1. A spindle mechanism, comprising:

The rotating mechanism is fixed on the rotating shaft base;

The rotating mechanism comprises a sliding piece, a first pin shaft, a second pin shaft, a first swing arm and a second swing arm, wherein the sliding piece is symmetrically provided with a first protruding part and a second protruding part, the first protruding part and the first swing arm are sleeved on the first pin shaft, and the second protruding part and the second swing arm are sleeved on the second pin shaft;

The first end and the second end of the first protruding part are positioned in a first axial direction of the first pin shaft; the first end and the second end of the second protruding part are positioned in the second axial direction where the second pin shaft is positioned; the first swing arm is provided with a first groove, and a first side and a second side in the first groove are positioned in the first axial direction; the second swing arm is symmetrically provided with a second groove relative to the first swing arm, and a first side and a second side in the second groove are positioned on the second shaft; the first end of the first protruding part is in spiral fit with the first side of the first groove, and the second end of the first protruding part is in spiral fit with the second side of the first groove; the first end of the second protruding part is in spiral fit with the first side of the second groove, and the second end of the second protruding part is in spiral fit with the second side of the second groove;

the first swing arm rotates around the first pin shaft;

the first swing arm drives the sliding piece to slide under the spiral cooperation of the first groove and the first protruding part;

the sliding piece drives the second swing arm to rotate around the second pin shaft under the spiral cooperation of the second protruding part and the second groove, and the rotation direction of the second swing arm is opposite to that of the first swing arm.

2. The spindle mechanism of claim 1, wherein the first swing arm comprises a first damping swing arm and a first synchronization swing arm, the first damping swing arm and the first synchronization swing arm being connected to form the first groove; the second swing arm comprises a second damping swing arm and a second synchronous swing arm, and the second damping swing arm is connected with the second synchronous swing arm to form the second groove.

3. The spindle mechanism according to claim 2, wherein the connection structure of the first damping swing arm and the first synchronization swing arm includes a first pin groove and a first pin, the first pin being engaged with the first pin groove in parallel with the first axial direction to restrict the first damping swing arm from being different from the first synchronization swing arm in rotation direction;

The connecting structure of the second damping swing arm and the second synchronous swing arm comprises a second pin groove and a second pin post, and the second pin post is matched with the second pin groove in a manner of being parallel to the second shaft so as to limit the rotation direction of the second damping swing arm and the second synchronous swing arm to be different.

4. A spindle mechanism according to claim 2 or 3, wherein the connection structure of the first damping swing arm and the first synchronization swing arm further includes a first clamping portion and a first buckling portion, the first clamping portion being engaged with the first buckling portion on a plane perpendicular to the first damping swing arm to restrict separation of the first damping swing arm from the first synchronization swing arm;

The connecting structure of the second damping swing arm and the second synchronous swing arm further comprises a second clamping part and a second buckling part, wherein the second clamping part is matched with the second buckling part on a plane perpendicular to the second damping swing arm so as to limit the separation of the second damping swing arm and the second synchronous swing arm.

5. The spindle mechanism according to any one of claims 2-4, further comprising an elastic member base, an elastic member, a cam base;

The elastic piece base is fixed on the rotating shaft base;

The cam base is in abutting fit with the first swing arm and the second swing arm;

The elastic piece is compressed between the elastic piece base and the cam base, and the sliding piece is attached to the first swing arm and the second swing arm under the action of the elastic force of the elastic piece.

6. The spindle mechanism of claim 5, wherein the cam base is symmetrically provided with a first cam and a second cam;

The first damping swing arm is provided with a first sleeve, the first cam is pressed against the first sleeve of the first damping swing arm, and the first groove is attached to the first protruding part;

the second damping swing arm is provided with a first sleeve, the second cam is propped against the first sleeve of the second damping swing arm, and the second groove is attached to the second protruding portion.

7. The pivot mechanism of claim 6, wherein an end of the first cam facing the first damping swing arm first sleeve has a first concave-convex surface, an end of the first damping swing arm first sleeve facing the first cam has a second concave-convex surface, and the first concave-convex surface is pressed against the second concave-convex surface, so that the first damping swing arm rotates around the first pin shaft to generate damping.

8. The pivot mechanism of claim 6 or 7, wherein an end of the second cam facing the first sleeve of the second damping swing arm has a third concave-convex surface, an end of the first sleeve of the second damping swing arm facing the second cam has a fourth concave-convex surface, and the third concave-convex surface is pressed against the fourth concave-convex surface, so that the second damping swing arm rotates around the second pin shaft to generate damping.

9. The spindle mechanism according to any one of claims 5-8, wherein the resilient member comprises a first sub-resilient member and a second sub-resilient member;

the first pin shaft penetrates through the first damping swing arm first sleeve and the first sub-elastic piece, and the second pin shaft penetrates through the second damping swing arm first sleeve and the second sub-elastic piece.

10. The spindle mechanism of any one of claims 2-9, further comprising a slider base, a first side of the slider base being secured to the spindle base, the slider being located on a second side of the slider base remote from the spindle base;

the first pin shaft and the second pin shaft are fixed on the slider base;

The first swing arm and the second swing arm are in running fit with the slider base.

11. The spindle mechanism of claim 10, wherein an end of the first synchronization swing arm facing the slider base has a first limit portion;

one end of the slider base, which faces the first synchronous swing arm, is provided with a third limiting part;

the first limiting part is in butt fit with the third limiting part so as to limit the first synchronous swing arm not to exceed the plane where the second side of the slider base is located.

12. The spindle mechanism according to claim 10 or 11, wherein an end of the second synchronization swing arm facing the slider base has a second stopper portion;

one end of the sliding piece base, which faces the second synchronous swing arm, is provided with a fourth limiting part;

the second limiting part is in butt fit with the fourth limiting part so as to limit the second synchronous swing arm not to exceed the plane where the second side of the slider base is located.

13. The spindle mechanism of any one of claims 1-12, wherein the first projection first end has a first helical ramp and the first projection second end has a second helical ramp; the first side of the first groove is provided with a third spiral inclined plane, and the second side of the first groove is provided with a fourth spiral inclined plane; the first spiral inclined plane of the first protruding part is attached to the third spiral inclined plane of the first groove, and the second spiral inclined plane of the first protruding part is attached to the fourth spiral inclined plane of the first groove.

14. The spindle mechanism of any one of claims 1-13, wherein the second projection first end has a first helical ramp and the second projection second end has a second helical ramp; the first side of the second groove is provided with a third spiral inclined plane, and the second side of the second groove is provided with a fourth spiral inclined plane; the first spiral inclined plane of the second protruding part is attached to the third spiral inclined plane of the second groove, and the second spiral inclined plane of the second protruding part is attached to the fourth spiral inclined plane of the second groove.

15. The spindle mechanism of any one of claims 1-14, wherein the first projection has a first pin bore through which the first pin shaft passes, the first pin bore through which the first end and the second end of the first projection are connected;

the second protruding portion is provided with a second pin hole, the second pin hole is in through connection with the first end and the second end of the second protruding portion, and the second pin shaft penetrates through the second pin hole.

16. An electronic device comprising a first center, a second center, a flexible screen, and the spindle mechanism of any one of claims 1-15;

The first middle frame is connected with the first swing arm in the rotating shaft mechanism, and the second middle frame is connected with the second swing arm in the rotating shaft mechanism; the flexible screen is fixed on the first middle frame and the second middle frame.