WO2025102797A1 - 转轴机构、可折叠设备及转轴机构的制备方法 - Google Patents

转轴机构、可折叠设备及转轴机构的制备方法 Download PDF

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Publication number
WO2025102797A1
WO2025102797A1 PCT/CN2024/106203 CN2024106203W WO2025102797A1 WO 2025102797 A1 WO2025102797 A1 WO 2025102797A1 CN 2024106203 W CN2024106203 W CN 2024106203W WO 2025102797 A1 WO2025102797 A1 WO 2025102797A1
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WO
WIPO (PCT)
Prior art keywords
door panel
swing arm
segment
molded
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/106203
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English (en)
French (fr)
Inventor
熊立志
龚文强
董绍洪
陈瑞豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honor Device Co Ltd
Original Assignee
Honor Device Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honor Device Co Ltd filed Critical Honor Device Co Ltd
Publication of WO2025102797A1 publication Critical patent/WO2025102797A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/045—Pivotal connections with at least a pair of arms pivoting relatively to at least one other arm, all arms being mounted on one pin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections

Definitions

  • the present application relates to the field of structural forming, and in particular, to a hinge mechanism, a foldable device, and a method for preparing the hinge mechanism.
  • the hinge mechanism is the main structure for folding in foldable devices such as foldable phones.
  • the hinge mechanism includes a door panel and a swing arm.
  • the door panel is used to support the flexible screen of the foldable device, and the swing arm is used to form a rotating pair with other structures to achieve relative rotation.
  • the door panel and the swing arm are processed and formed separately, and then connected together by welding, bonding, etc.
  • the relative position of the swing arm and the door panel in the structure obtained by this processing method is difficult to ensure, which may cause the rotational cooperation between the swing arm and other structures to be stuck, affecting the user experience of the hinge mechanism.
  • the present application provides a rotating shaft mechanism, a foldable device and a method for preparing the rotating shaft mechanism to solve the problem that the relative position accuracy of the swing arm and the door panel in the swing arm door panel of the known rotating shaft mechanism is difficult to ensure.
  • an embodiment of the present application provides a pivot mechanism, comprising a base and a swing arm door panel, the swing arm door panel being rotatably connected to the base; the swing arm door panel comprising a first molded portion and a second molded portion molded as one piece; the first molded portion is provided with a plurality of connecting holes, and a partition portion is provided between adjacent connecting holes; the second molded portion comprises a main body portion and a plurality of connecting portions connected to the main body portion, and a partition groove is provided between adjacent connecting portions; the plurality of connecting portions are respectively molded in the plurality of connecting holes, and the partition grooves cooperate with the partition portions.
  • the first molded portion and the second molded portion of the swing arm door panel of the pivot mechanism in this embodiment are molded on both sides of the partition through the spaced connecting portion, and can be shrunk based on the partition respectively, ensuring the accurate relative position of the connecting portion and the door panel, which is beneficial to ensure the structural accuracy of the molded swing arm door panel, ensure the precise fit between the swing arm door panel and the base or other components, and ensure that the pivot mechanism rotates smoothly without jamming.
  • the side surface of the first forming part facing the second forming part is the first surface
  • the first surface is provided with a boss
  • the connecting hole is located inside the outer contour of the boss.
  • the second forming part has a second surface
  • the second surface is provided with a groove
  • the connecting part is convexly arranged on the bottom surface of the groove.
  • the boss matches the groove, and the projection of the boss and the groove in a plane parallel to the first surface is non-circular.
  • the non-circular boss and the matching limit of the groove can further limit the displacement of the second molding part relative to the first molding part in a plane parallel to the first surface, and limit the rotation of the two around an axis parallel to the first direction.
  • the thickness of the first molding part connected to the second molding part is thickened by the boss, which is conducive to improving the structural strength and rigidity of the part and reducing the possibility of deformation or damage of the first molding part under stress.
  • the second molding part is provided with a groove to accommodate the boss, which reduces the size of the overall structure along the thickness direction and is conducive to the miniaturized design of the structure.
  • a concave hole is provided on the bottom surface of the groove corresponding to the position of the separation groove, and a convex column is provided on the boss corresponding to the position of the separation portion, and the convex column matches the concave hole.
  • the first molded part and the second molded part can be positioned and fastened by the cooperation of the concave hole and the convex column, and the combination of the first molded part and the second molded part is further improved.
  • the shrinkage of the material of the second molded part will cause the material around the concave hole to shrink and wrap the convex column, further improving the combination of the second molded part and the first molded part.
  • the projections of the boss and the groove in a plane parallel to the first surface are polygonal, and at least some of the corners of the polygon are provided with rounded corners or chamfers.
  • the polygonal bosses and grooves can achieve mutual limitation in the second direction and the third direction and limit rotation around an axis parallel to the first direction.
  • Rounded corners or chamfered transitions are provided at the corners, which can reduce stress concentration at the corners and reduce the problem of deformation and cracking at the corners.
  • the first molded portion has a first surface
  • the connecting hole includes a first hole segment and a second hole segment
  • the first hole segment is recessed from the first surface
  • the second hole segment is connected to an end of the first hole segment away from the first surface
  • the cross-section of the second hole segment is larger than the first hole segment.
  • the second molded portion has a second surface
  • the connecting portion includes a first connecting segment and a second connecting segment, the first connecting segment is convexly arranged on the second surface of the main body, and the second connecting segment is connected to an end of the first connecting segment away from the main body.
  • the first connecting segment cooperates with the first hole segment
  • the second connecting segment cooperates with the second hole segment.
  • the main body and the T-shaped connecting portion are connected to form an I-shape.
  • the molding material of the swing arm shrinks along the first direction to form a clamping force, which will make the part sandwiched between the main body and the second connecting section of the I-shaped second molding part reliably combined with the first molding part, ensuring the firmness of the combination of the two, and can reliably limit the displacement of the second molding part relative to the first molding part along the first direction, thereby improving the integrity and structural dimensional accuracy of the two.
  • the edge lines at both end surfaces of the first hole segment in the depth direction are provided with rounded corners or chamfered transitions; and/or the edge line of the second hole segment close to one end of the first hole segment is provided with rounded corners or chamfered transitions.
  • the contact and joining area between the connecting portion and the connecting hole can be increased, and on the other hand, stress concentration at the corner can be reduced, thereby reducing the problem of shrinkage and cracking of the formed swing arm door panel at the joint.
  • the depth direction of the connection hole is along the first direction, and the plurality of connection holes are spaced apart along the second direction.
  • a strip portion is connected between two side surfaces of the connection hole along the second direction, and the strip portion is located on the side of the connection hole close to the second forming portion along the first direction.
  • the connection portion is provided with a strip hole, and the strip portion matches the strip hole.
  • the second molding part secondary molded on the first molding part, the side hole surfaces of the strip hole of which surround the strip part, are limited to the first molding part in the first direction and the third direction (the third direction is perpendicular to the first direction and the second direction), and the connection part and the connection hole are limited along the end surface of the second direction, so that the second molding part and the first molding part can be limited in the second direction.
  • the strip part along the second direction is provided in combination with the second molding part, so that the first molding part and the second molding part can be positioned and guided along the second direction, and the direction consistency along the second direction can be ensured after the two are combined.
  • the length direction of the door panel is the second direction
  • the connecting hole is in the shape of a long strip extending along the second direction.
  • the connecting hole in the shape of an elongated strip along the second direction, the cooperation between the connecting hole and the connecting part can limit the rotation of the second molded part relative to the first molded part around an axis parallel to the first direction, thereby ensuring the consistency of the relative directions of the first molded part and the second molded part, and ensuring the dimensional accuracy and degree of integration of the first molded part of the second molded part.
  • the first molded part includes a door panel
  • the second molded part includes a swing arm
  • the swing arm door panel is divided into a door panel and a swing arm.
  • the thickness direction of the door panel is the first direction
  • the length direction of the door panel is the second direction.
  • the door panel has a first surface, the first surface is perpendicular to the first direction, and a boss is convexly provided on the first surface;
  • the door panel has two
  • the swing arm comprises a main body and two connecting parts, the main body comprises a rotating arm, and the rotating arm is used to rotate and cooperate with the base;
  • the main body has a second surface, and the main body has a groove concave from the second surface, the two connecting parts are respectively convexly arranged on the bottom surface of the groove, and the two connecting parts are spaced along the second direction, and there is a partition groove between the two connecting parts;
  • the bottom surface of the partition groove is provided with a concave hole.
  • the swing arm is integrally formed on the door panel by secondary molding, and the second surface is superimposed on the first surface, the boss cooperates with the groove, the convex column cooperates with the concave hole, the two connecting parts cooperate with the two connecting holes respectively, and the two connecting parts are clamped on both sides of the partition and the convex column.
  • the swing arm door panel component includes a plurality of sub-structural segments, each of which includes a door panel segment and a swing arm, the door panel segment extends along a second direction, and the plurality of door panel segments are connected along the second direction; the first molded portion includes a portion of the plurality of sub-structural segments, and the second molded portion includes another portion of the plurality of sub-structural segments.
  • the swing arm door panel is divided into a plurality of sub-structure sections, which is suitable for forming a swing arm door panel with a larger length.
  • the sub-structure segment located in the middle is the first sub-structure segment
  • the two sub-structure segments located on both sides are the second sub-structure segments
  • the first forming part includes the first sub-structure segment
  • the second forming part includes the second sub-structure segment
  • the door panel segment of the first sub-structure segment is provided with first overlapping segments at both ends along the second direction, and the thickness of the first overlapping segment is less than the thickness of the door panel
  • the first overlapping segment is provided with two connecting holes, the two connecting holes are spaced along the second direction, and a partition portion is provided between the two connecting holes
  • the door panel segment of the second sub-structure segment is provided with a second overlapping segment at one end close to the first sub-structure segment, and two connecting parts are protruding from the surface of one side of the second overlapping segment facing the first overlapping segment, the two connecting parts are spaced along the second direction, and a partition groove is provided between the two connecting parts
  • the second overlapping segment is overlapped with the first
  • the integrity and relative position accuracy of the multiple sub-structure segments can be greatly improved through the cooperation of the two connecting parts and the two connecting holes and the partition part serving as the molding reference of the two connecting parts.
  • an embodiment of the present application provides a foldable device, which includes a middle frame, a flexible screen and the aforementioned hinge mechanism.
  • the middle frame is rotatably connected to a swing arm door panel; the flexible screen covers the middle frame and the hinge mechanism and is supported by the swing arm door panel.
  • the foldable device in this embodiment adopts the aforementioned hinge mechanism, which has high structural strength, dimensional accuracy and high degree of integration.
  • an embodiment of the present application provides a method for preparing a shaft mechanism, which is used to prepare the aforementioned shaft mechanism.
  • the method for preparing the shaft mechanism includes preparing a swing arm door panel.
  • the preparation of the swing arm door panel includes:
  • a second molded portion is formed on the first molded portion through a secondary molding process, so that the second molded portion and the first molded portion are molded into an integrated swing arm door panel, and adjacent connecting portions of the molded second molded portion are clamped on both sides of the partition portion.
  • the second molded part is molded on the first molded part, and the two are combined through multiple connecting holes and multiple connecting parts, which can achieve mutual limitation and high bonding strength, and the cooperation of the strip-shaped connecting holes and the connecting parts can limit the second molded part from rotating relative to the first molded part around an axis parallel to the first direction, thereby ensuring the consistency of the relative directions of the first molded part and the second molded part, and ensuring the dimensional accuracy and degree of integration of the rotating shaft mechanism.
  • the first forming part includes a door panel, and the second forming part includes a swing arm; the door panel is formed first, and then the swing arm is secondary formed on the door panel, or,
  • the swing arm door panel member includes a plurality of sub-structure segments, each of which includes a door panel segment and a swing arm.
  • the plurality of door panel segments are connected along a second direction; the first molded portion includes a part of the plurality of sub-structural segments, and the second molded portion includes another part of the plurality of sub-structural segments; the sub-structural segments of the first molded portion are molded first, and then the sub-structural segments of the second molded portion are molded on the sub-structural segments of the first molded portion.
  • the swing arm door panel can be divided and formed in two different division modes.
  • the molding material used for the second molding part is MIM metal, amorphous metal, plastic or Peek material, and the second molding part is integrally molded with the first molding part through MIM process, amorphous molding process or injection molding process.
  • the first molded part can be molded using various materials and various secondary molding processes.
  • the molding material used for the first molding part is MIM metal, stamping metal, 3D printing metal or amorphous metal, and the first molding part is formed by MIM process, 3D printing molding process, punching and forging molding process, CNC machining process or amorphous molding process.
  • the first molded part can be made of various materials and various molding processes.
  • FIG1 is a three-dimensional view of a foldable device when unfolded according to an embodiment of the present application
  • FIG2 is a three-dimensional view of the foldable device of FIG1 when folded
  • FIG3 is a cross-sectional view of the foldable device of FIG1 along line A-A;
  • FIG4 is a cross-sectional view of the foldable device of FIG2 along line B-B;
  • FIG5 is a structural diagram of a swing arm door panel according to an embodiment of the present application.
  • FIG6 is a structural diagram of a door panel according to an embodiment of the present application.
  • FIG7 is a structural diagram of a swing arm according to an embodiment of the present application.
  • FIG8 is an enlarged view of point C in FIG7;
  • FIG10 is a cross-sectional view of the junction of the door panel of FIG6 and the swing arm of FIG7;
  • FIG11 is a partial view of another embodiment of the door panel of the present application.
  • Fig. 12 is a cross-sectional view along line D-D of Fig. 11;
  • FIG13 is a structural diagram of another implementation of the swing arm of the embodiment of the present application.
  • FIG14 is a partial view of yet another embodiment of the door panel of the present application.
  • FIG15 is a bottom view of FIG14
  • FIG17 is a schematic diagram of another division form of the swing arm door panel according to an embodiment of the present application.
  • FIG18 is an expanded view of the connection between adjacent substructure segments in FIG17;
  • FIG. 19 is a cross-sectional view of the connection between adjacent substructure segments in FIG. 17 .
  • Foldable devices 100 First middle frame 101 Second middle frame 102 Flexible screen 103 Rotating shaft mechanism 110 Base 111 Door Panel 112 Swing arm 113 Swing arm door panel 115 First molding part 11 Second molding section 12 Swivel arm 13 Main body 14 Connection 15 Divider 16 Boss 17 Boss 18 Rounded Corners 19 Chamfer 20 Strip 21 Substructure segment 22 First substructure segment 22a Second substructure segment 22b Door section 23 First overlapping section 24a Second overlapping section 24b First connecting section 25 Second connecting section 26 Connection hole K1 First hole section K2 Second hole section K3 Concave hole K4 Strip hole K5 Separator slot C1 Groove C2 First direction Z Second direction X The third direction Y First surface P1 Second surface P2 Second surface P2
  • Foldable devices such as some foldable mobile phones and tablet computers, are folded or unfolded through a hinge mechanism.
  • Figures 1 and 2 show a foldable device 100, which is specifically a foldable mobile phone.
  • the foldable device 100 mainly includes two middle frames (named as the first middle frame 101 and the second middle frame 102 respectively), a flexible screen 103 and a hinge mechanism 110.
  • the first middle frame 101 and the second middle frame 102 are respectively connected to the two sides of the hinge mechanism 110, and the flexible screen 103 covers the first middle frame 101, the hinge mechanism 110 and the second middle frame 102.
  • the hinge mechanism 110 Through the hinge mechanism 110, the first middle frame 101 and the second middle frame 102 of the foldable device 100 can be relatively unfolded or folded, and at the same time drive the flexible screen 103 to unfold or fold.
  • Figure 1 for the unfolded state of the foldable device 100
  • Figure 2 for the folded state.
  • the foldable device 100 shown in Figures 1 and 2 is an outer folding device, that is, the flexible screen 103 after folding is located outside the first middle frame 101 and the second middle frame 102.
  • the foldable device 100 can also be an inner folding device, that is, the flexible screen 103 after folding is located between the first middle frame 101 and the second middle frame 102.
  • the foldable device 100 may also be a device that can be folded twice or more, which is not limited here.
  • the hinge mechanism 110 includes a base 111 and two swing arm door panels 115 .
  • the two swing arm door panels 115 are respectively connected to two sides of the base 111 and are used to respectively connect the first middle frame 101 and the second middle frame 102 .
  • the swing arm door panel 115 in this embodiment has an integrated door panel 112 and a swing arm 113 .
  • the swing arm 113 is used to rotatably cooperate with the base 111
  • the door panel 112 is used to support the flexible screen 103 of the foldable device 100 .
  • the swing arm door panel 115 rotates with the middle frame and the base 111 to form a rotating pair.
  • the two door panels 112 coplanarly support the unfolded flexible screen 103; when the flexible screen 103 is in the folded state (see Figure 4), the two door panels 112 rotate a certain angle relative to the base 111, so as to reliably support the bent flexible screen 103, which is conducive to adapting the support of the flexible screen 103 in different states.
  • the swing arm door panel 115 includes a door panel 112 and a plurality of swing arms 113 (three in the figure).
  • the door panel 112 is a long strip-shaped plate-like structure extending along the second direction X, and the thickness direction is along the first direction Z.
  • the door panel 112 is used to support the flexible screen 103.
  • the plurality of swing arms 113 are sequentially formed on the door panel 112 at intervals along the second direction X, and are used to form a revolute pair with other components.
  • the swing arm 113 in FIG. 5 is a double-rotation swing arm, which is formed integrally from two swing arm parts. One side of the double-rotation swing arm is used for rotationally connecting the base 111 , and the other side is used for rotationally connecting the first middle frame 101 / the second middle frame 102 , thereby forming two rotation pairs.
  • the swing arm door panel 115 shown in FIG5 is used as a single structural member for the rotating shaft mechanism 110, which can reduce the number of assembled parts of the rotating shaft mechanism 110 and reduce the impact of the assembly error between the door panel 112 and the swing arm 113 on the rotation accuracy of the rotating shaft mechanism 110.
  • the increase in thickness of the rotating shaft mechanism 110 caused by the additional connection requirements of the door panel 112 and the swing arm 113 can also be reduced, which is conducive to the thinning design of the rotating shaft mechanism 110 and even the overall thickness of the foldable device 100.
  • the swing arm and the door panel of the rotating shaft mechanism are obtained by forming them separately and then connecting them.
  • the door panel and the swing arm are separately molded, and then the door panel and the swing arm are connected together by welding or gluing.
  • This method of connecting the swing arm and the door panel after being separately designed and molded requires high precision of the individual parts, especially the size of the connection of the individual parts needs to be accurately adapted, and the manufacturing cost is high.
  • the swing arm door panel 115 shown in FIG5 can be composed of two or more molded parts as an integrated structural member.
  • the swing arm door panel 115 includes two molded parts, which are respectively named as a first molded part 11 and a second molded part 12.
  • the division of the first molded part 11 and the second molded part 12 of the swing arm door panel 115 can be determined as needed.
  • FIG. 6-FIG . 10 show a first division method of the swing arm door panel 115 ;
  • FIG. 17-FIG . 19 show another division method of the swing arm door panel 115 , which will be introduced below respectively.
  • the first molded portion 11 of the swing arm door panel 115 is the door panel 112 in FIG. 7
  • the second molded portion 12 is the swing arm 113 in FIG. 6 .
  • the door panel 112 When manufacturing the swing arm door panel 115, the door panel 112 can be formed first, and then three swing arms 113 can be formed on the door panel 112 through secondary molding, thereby forming an integrated swing arm door panel 115; or the three swing arms 113 can be formed first, and then the door panel 112 can be formed on the three swing arms 113 through secondary molding, thereby forming an integrated swing arm door panel 115.
  • the number of the swing arms 113 may also be set to other numbers as needed, which is not limited here.
  • the swing arm 113 may also include only one side of the swing arm portion, so that it only forms one rotation pair.
  • the swing arm 113 may also be replaced by other structures attached to the door panel 112.
  • parts for matching with each other are respectively provided on the door panel 112 and the swing arm 113.
  • the door panel 112 is a long strip-shaped plate-like structure.
  • the side surface of the door panel 112 facing the swing arm 113 along the thickness direction (i.e., the first direction Z) is the first surface P1, and the boss 17 is protruded from the first surface P1.
  • the shape of the outer contour of the boss 17 in the plane parallel to the first surface P1 is non-circular, for example, a polygon.
  • the door panel 112 is provided with two connecting holes K1 in the part inside the outer contour of the boss 17, and the two connecting holes K1 pass through the door panel 112 along the first direction Z respectively.
  • the two connecting holes K1 are spaced along the length direction of the door panel 112 (i.e., the second direction X), so that a partition 16 is defined between the two connecting holes K1.
  • adjacent connecting holes K1 are staggered along the width direction of the door panel 112 (i.e., the third direction Y).
  • the boss 17 is provided with a boss 18 at a position corresponding to the partition 16.
  • the maximum dimension of the boss 18 is set within 1.0 mm.
  • the boss 18 can be a cylindrical, prism or special-shaped columnar structure.
  • connection hole K1 includes a first hole segment K2 and a second hole segment K3, the first hole segment K2 is recessed from the first surface P1, the second hole segment K3 is connected to the end of the first hole segment K2 away from the first surface P1, and the cross section of the second hole segment K3 is larger than the first hole segment K2, so that the connection hole K1 is T-shaped.
  • the shape of the first hole segment K2 and the shape of the second hole segment K3 can be the same or different.
  • the first hole segment K2 is an oval shape
  • the second hole segment K3 is a shape combining a rectangle and a single-sided semicircle.
  • the swing arm 113 shown in FIG6 includes a main body 14 and two connecting parts 15.
  • the main body 14 includes two rotating arms 13, which are used to rotate and cooperate with the base 111 and the middle frame respectively.
  • the main body 14 has a second surface P2, and the main body 14 has a groove C2 recessed from the second surface P2, and the two connecting parts 15 are respectively convexly arranged on the groove bottom surface of the groove C2, and the two connecting parts 15 are spaced along the second direction X, and a separation groove C1 is defined between the two connecting parts 15; the groove bottom surface of the separation groove C1 is provided with an inwardly concave hole K4.
  • the connecting portion 15 is T-shaped (see FIG. 10 ), and the connecting portion 15 and the main body 14 form an I-shaped structure.
  • the connecting portion 15 includes a first connecting section 25 and a second connecting section 26.
  • the first connecting section 25 is connected to the main body 14, and the second connecting section 26 is connected to the main body 14. At an end of the first connecting section 25 away from the main body 14 .
  • FIG. 10 shows a state where the swing arm 113 of FIG. 6 is integrally formed with the door panel 112 of FIG. 7 to FIG. 9 .
  • the swing arm 113 is integrally formed on the door panel 112 by secondary molding, the second surface P2 overlaps the first surface P1, the boss 17 is matched with the groove C2, the boss 18 is matched with the concave hole K4, the two connecting parts 15 are respectively matched with the two connecting holes K1, and the two connecting parts 15 are clamped on both sides of the partition 16 and the boss 18.
  • the first connecting section 25 of the connecting part 15 is matched with the first hole section K2 of the connecting hole K1
  • the second connecting section 26 of the connecting part 15 is matched with the second hole section K3 of the connecting hole K1.
  • the connecting portion 15 is matched in the connecting hole K1, so that the swing arm 113 and the door panel 112 are combined into one body and form a mutual limit, ensuring the reliable combination between the door panel 112 and the swing arm 113.
  • the I-shaped structure formed by the main body 14 and the T-shaped connecting portion 15 is matched with the door panel 112.
  • the molding material of the swing arm 113 shrinks along the first direction Z to form a clamping force, which will make the part sandwiched between the second surface P2 of the swing arm 113 and the second connecting section 26 reliably combined with the door panel 112, ensuring the firmness of the combination of the two, and being able to reliably limit the displacement of the swing arm 113 relative to the door panel 112 along the first direction Z, improving the integrity and structural dimensional accuracy of the two.
  • the connecting hole K1 is in the shape of an elongated strip extending along the length direction of the door panel 112 (i.e., the second direction X)
  • the cooperation between the connecting hole K1 and the connecting portion 15 can limit the rotation of the swing arm 113 relative to the door panel 112 around an axis parallel to the first direction Z, thereby ensuring the consistency of the relative directions of the door panel 112 and the swing arm 113, and ensuring the dimensional accuracy and degree of integration of the swing arm door panel 115.
  • connection reliability between the swing arm 113 and the door panel 112 can be further improved.
  • the partition 16 between the connection holes K1 is matched in the partition groove C1, which can further improve the limiting effect of the door panel 112 on the swing arm 113 along the second direction X.
  • the partition 16 located in the middle can limit the displacement of the swing arm 113 to the left or right relative to the door panel 112 along the second direction X, and the limiting effect is better.
  • connection parts 15 on both sides are formed on both sides of the partition 16, and can be shrunk with the partition 16 as the reference during molding, ensuring the relative position of the connection part 15 and the door panel 112 is accurate, which is conducive to ensuring the structural accuracy of the molded swing arm door panel 115, ensuring the accurate matching of the swing arm door panel 115 with the base 111 or its frame, and ensuring that the rotating shaft mechanism 110 rotates smoothly and is not easy to get stuck.
  • the matching and limiting of the polygonal boss 17 and the groove C2 can further limit the displacement of the swing arm 113 relative to the door panel 112 along the second direction X or the third direction Y, and limit the rotation of the two around the axis parallel to the first direction Z.
  • the thickness dimension of the door panel 112 connecting the swing arm 113 is thickened, which is conducive to improving the structural strength and rigidity of the location, and reducing the possibility of deformation or damage of the door panel 112 at the location.
  • the swing arm 113 is provided with a groove C2 to accommodate the boss 17, which reduces the size of the overall structure along the thickness direction, and is conducive to the miniaturized design of the structure.
  • the door panel 112 and the swing arm 113 can be positioned and fastened in the second direction X and the third direction Y, further improving the firmness of the combination between the door panel 112 and the swing arm 113.
  • the material contraction of the swing arm 113 causes the material around the concave hole K4 to contract and wrap the convex column 18 in the second direction X and the third direction Y, further improving the firmness of the combination between the swing arm 113 and the door panel 112.
  • connection holes K1 are staggered along the third direction Y.
  • the non-collinear staggered arrangement can also reduce the degree of rotation of the two connection parts 15 around the centers of the two in the collinear situation, thereby improving the relative position reliability of the swing arm 113 and the door panel 112.
  • the swing arm door panel 115 shown in Figures 7 to 10 in addition to the door panel 112 and the swing arm 113 being connected to each other through the material bonding force of the contact interface between the two, can also ensure the relative position accuracy of the two and make the two hold each other tightly through the mutual limiting structure between the door panel 112 and the swing arm 113 in the first direction Z, the second direction X, and the third direction Y as well as the limiting rotation structure.
  • the partition 16 and the boss 18 on the first formed door panel 112 can be used as a forming reference for the swing arm 113, so that when the swing arm 113 is secondary formed, the two connecting parts 15 of the swing arm 113 are contracted toward each other with the partition 16 as a reference, thereby ensuring the relative position accuracy between the swing arm 113 and the door panel 112 after forming.
  • the design requirements for dimensional accuracy at the joint surface between the door panel 112 and the swing arm 113 can also be reduced.
  • FIGS. 11 and 12 show another embodiment of the door panel 112.
  • the door panel 112 in FIGS. 11 and 12 differs from the door panel 112 in FIGS. 8-9 mainly in the following two aspects:
  • a rounded corner 19 or a chamfered corner 20 is provided at the corner of the outer contour of the polygonal boss 17.
  • the rounded corner 19 or the chamfered corner transition can increase the contact and bonding area between the boss 17 and the groove C2 on the one hand, and reduce the stress concentration at the corner on the other hand, thereby reducing the shrinkage and cracking problem of the formed swing arm door panel 115 at the bonding point;
  • the first hole segment K2 is provided with a rounded corner 19 or a chamfered corner 20 transition along the edge line at both end surfaces in the first direction Z
  • the second hole segment K3 is provided with a rounded corner 19 or a chamfered corner transition along the edge line near one end of the first hole segment K2 in the first direction Z.
  • the rounded corner 19 or the chamfered corner 20 transition can increase the contact and bonding area between the connection portion 15 and the connection hole K1 on the one hand, and reduce the stress concentration at the corner on the other hand, thereby reducing the problem of shrinkage and cracking at the bonding point of the formed swing arm door panel 115.
  • the door panel 112 and the swing arm 113 shown in FIGS. 13 to 16 adopt a combination structure different from that adopted by the door panel 112 and the swing arm 113 shown in FIGS. 7 to 10 .
  • connection holes K1 spaced apart along the second direction X.
  • the connection holes K1 are straight holes, for example, straight holes with a rectangular cross section whose length direction is along the second direction X.
  • a partition 16 is defined between the two connection holes K1.
  • a strip portion 21 is connected between two side surfaces of the connection holes K1 along the second direction X.
  • the strip portion 21 is a long strip structure extending along the second direction X, and the strip portion 21 is located on the side close to the swing arm 113 along the first direction Z.
  • the swing arm 113 includes a main body 14 and two connecting parts 15, the two connecting parts 15 are spaced apart from each other along the second direction X and are respectively integrally formed on the main body 14.
  • a separation groove C1 is defined between the two connecting parts 15, and the connecting part 15 is a rectangular block structure and has a strip hole K5 extending along the second direction X.
  • the strip hole K5 is adapted to the strip portion 21, the connecting portion 15 is matched with the connecting hole K1, and the partition groove C1 is matched with the partition portion 16.
  • the swing arm 113 which is secondary molded on the door panel 112, has the strip hole K5 on each side surface surrounding the strip portion 21, so that it is limited to the door panel 112 in the first direction Z and the third direction Y.
  • the connection portion 15 and the connecting hole K1 are limited along the end surface of the second direction X, so that the swing arm 113 and the door panel 112 can be limited in the second direction X.
  • the strip portion 21 along the second direction X is provided to be combined with the swing arm 113, so that the positioning and guiding of the door panel 112 and the swing arm 113 along the second direction X can be achieved, and the directional consistency along the second direction X after the two are combined can be ensured.
  • the cross-section of the strip portion 21 in a plane perpendicular to the second direction X is square, which can limit the swing arm 113 from rotating relative to the door panel 112 around a rotation axis parallel to the second direction X, thereby ensuring the integrity and firmness of the door panel 112 and the swing arm 113.
  • the door panel 112 may also be provided with a convex column 18 to cooperate with the concave hole K4 of the swing arm 113 .
  • a convex column 18 to cooperate with the concave hole K4 of the swing arm 113 .
  • 17 to 19 show a second division form of the swing arm door panel 115 of FIG. 5 .
  • the middle sub-segment 22 is the first sub-segment 22a, and the sub-segments 22 on both sides are the second sub-segments 22b.
  • the first sub-segment 22a is first formed as the first molding part 11, and the second sub-segment 22b is formed on the first sub-segment 22a as the second molding part 12 by secondary molding.
  • FIGS. 18 and 19 The connection between the door panel segment 23 of the first sub-segment 22 a and the door panel segment 23 of the second sub-segment 22 b is shown in FIGS. 18 and 19 .
  • a first overlapping section 24a is provided at the end of the door panel section 23 of the first substructure section 22a along the second direction X, and the thickness of the first overlapping section 24a is less than the thickness of the door panel section 23; the first overlapping section 24a is provided with two connecting holes K1, and the two connecting holes K1 are spaced apart along the second direction X, and a partition 16 is defined between the two connecting holes K1.
  • the door panel section 23 of the second sub-structure section 22b is provided with a second overlapping section 24b at one end close to the first sub-structure section 22a.
  • the second overlapping section 24b is provided with two connecting parts 15 protruding from a surface of one side facing the first overlapping section 24a.
  • the two connecting parts 15 are spaced apart along the second direction X and define a separation groove C1 therebetween.
  • the second overlapping section 24 b overlaps with the first overlapping section 24 a along the thickness direction, and the two connecting portions 15 are respectively matched with the two connecting holes K1 , the partitioning portion 16 is matched with the partitioning groove C1 , and the two connecting portions 15 are respectively clamped on both sides of the partitioning portion 16 .
  • the total thickness (dimension along the first direction Z) of the two first overlapping sections 24a and the second overlapping section 24b after overlapping is equal to the thickness of the door panel section 23.
  • the thickness of the door panel 112 of the swing arm door panel 115 after forming is kept consistent in the length direction.
  • connection hole K1 and the shape of the connection part 15 in this embodiment can refer to the embodiments shown in Figures 7 to 10. That is, the connection hole K1 in this embodiment can be set as a T-shaped hole, and correspondingly, the connection part 15 is T-shaped to fit the connection hole K1, and the connection part 15 and the second overlapping section 24b are connected to form an I-shaped structure.
  • the connecting portion 15 and the second overlapping section 24b are connected to form an I-shape, and combined with the T-shaped connecting hole K1, the two first overlapping sections 24a and the second overlapping sections 24b can reliably limit each other in the first direction Z, the second direction X and the third direction Y, ensuring that the swing arm door panel 115 formed by the combination of the two has high integrity and structural accuracy.
  • the second overlapping section 24b and the connecting portion 15 connected to form an I-shape are formed on the first sub-structure section 22a through a secondary molding process, they can also hold the other sub-structure section 22 tightly through the shrinkage of the material, which can further improve the reliability of the combination of the two.
  • connection hole K1 may also be a tapered hole, and correspondingly, the connection portion 15 may be an inverted cone. The cooperation between the tapered hole and the inverted cone facilitates the first overlapping section 24a and the second overlapping section 24b to be tightly held together.
  • the swing arm door panel 115 is formed by integrally molding the first molding part 11 and the second molding part 12. In addition to being used for the aforementioned swing arm door panel 115, it can also be used for the door panel, shaft cover, support plate or other structures of the foldable device 100, and can also be used for structural parts of other products, which is not limited here.
  • This embodiment also provides a method for preparing a rotating shaft mechanism, which is used to prepare the aforementioned rotating shaft mechanism 110 .
  • the method for preparing the rotating shaft mechanism 110 in this embodiment includes:
  • the second molded portion 12 is secondary molded on the first molded portion 11 , so that the second molded portion 12 and the first molded portion 11 are molded into an integrated swing arm door panel 115 , and the adjacent connecting portions 15 of the molded second molded portion 12 are clamped on both sides of the partition portion 16 .
  • the first molding part 11 is formed by a MIM (Metal Injection Molding) process, a 3D printing molding process, a punching molding process, a CNC (Computer Numerical Control) processing process or an amorphous molding process;
  • the molding material used for the first molding part 11 is a MIM metal, a stamping metal, a 3D printing metal or an amorphous metal;
  • the second molding part 12 is integrally formed on the first molding part 11 by MIM process, amorphous molding process or injection molding process; the molding material used for the second molding part 12 is MIM metal, amorphous metal, plastic or Peek (polyetheretherketone) material.
  • the swing arm door panel 115 can be manufactured by multiple molding methods. According to the division of each molding part and the molding sequence, multiple preparation methods can be selected, which will be described exemplarily below.
  • the first preparation method :
  • the swing arm door panel 115 is divided into a door panel 112 and a plurality of swing arms 113.
  • the door panel 112 of the swing arm door panel 115 is used as the first molding part 11 and is prepared by one-time molding; the swing arm 113 is used as the second molding part 12 and is molded on the door panel 112 by a secondary molding process, thereby obtaining an integrated swing arm door panel 115.
  • the molding material of the door panel 112 can be stainless steel, titanium alloy, etc.
  • the molding method can be MIM molding, 3D printing molding, precision casting molding, CNC machining molding after punching and forging, amorphous molding, etc.
  • the structure of the door panel 112 for combining with the swing arm 113 can be directly molded on the door panel 112 in one-step molding, and can also be processed on the door panel 112 through a post-process (such as CNC machining) after one-step molding.
  • the swing arm 113 can be formed on the door panel 112 by secondary MIM molding, secondary vacuum die casting, secondary injection molding, etc.
  • the material of the secondary molding can be the same as that of the primary molding, or it can be different.
  • a double-hole positioning column staggered structure is formed between the swing arm 113 and the door panel 112, which can achieve mutual positioning and connection in the first direction Z, the second direction X and the third direction Y, and can also achieve the function of preventing relative rotation energy.
  • the two connecting portions 15 of the formed swing arm 113 are respectively contracted based on the partition portion 16, so that a swing arm door panel 115 with high reliability and precision can be obtained.
  • the molding order of the door panel 112 and the swing arm 113 is changed, and multiple swing arms 113 are molded once as the first molding part 11; then the door panel 112 as the second molding part 12 is obtained by secondary molding on the multiple swing arms 113, thereby obtaining an integrated swing arm door panel 115.
  • the third preparation method is a first preparation method.
  • the division method of the swing arm door panel 115 is changed, and the swing arm door panel 115 is divided into multiple sub-structure segments 22 along the length direction (i.e., the second direction X).
  • the first sub-structure segment 22a one or several sub-structure segments 22 (defined as the first sub-structure segment 22a) are formed at one time, and then, on the basis of the formed sub-structure segment 22, the remaining sub-structure segments 22 (defined as the second sub-structure segment 22b) are secondary molded.
  • the method shown in Figure 17 is used to divide the swing arm door panel 115 into three sub-structure segments 22.
  • the middle sub-structure segment 22 i.e., the first sub-structure segment 22a
  • the left sub-structure segment 22 i.e., the second sub-structure segment 22b
  • the right sub-structure segment 22 i.e., the second sub-structure segment 22b
  • the "left side”, “middle”, and “right side” here are described in the state shown in Figure 17.
  • the adjacent first sub-structure segment 22a and the second sub-structure segment 22b are connected through the two connecting holes K1 of the first overlapping segment 24a and the two connecting parts 15 of the second overlapping segment 24b, so that reliable connection can be achieved.
  • a clear dividing line may exist at the connection position.
  • the one-step molding may be performed using a MIM process, and the length (dimension along the second direction X) of the obtained first substructure segment 22a may be limited to less than 70.0 mm.
  • the preparation method is applicable to a swing arm door panel 115 having a length greater than 60.0 mm.
  • the long end faces of the first sub-structure section 22a and the second sub-structure section 22b can be directly combined, and then additional welding or the like is performed. Enhance bonding strength.
  • the swing arm door panel 115 may also be prepared by other methods, such as single molding of materials such as stainless steel, titanium alloy, zirconium-based amorphous alloy, etc., and the obtained swing arm door panel 115 has no obvious boundary lines or interfaces between the parts.
  • the single molding method may be MIM molding, amorphous molding, 3D printing molding, precision casting, etc.
  • the pivot mechanism 110 in the embodiment of the present application has a high bonding strength between the first molded part 11 and the second molded part 12, and the adjacent connecting part 15 of the second molded part 12 is secondary molded by using the partition part 16 of the first molded part 11 as a reference, which can ensure a higher relative position accuracy between the swing arm 113 and the door panel 112, and is conducive to the smooth rotation coordination of the pivot mechanism 110 and other structures without getting stuck.

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Abstract

一种转轴机构（110），属于结构成型领域，旨在解决已知转轴机构的摆臂和门板的相对位置精度较低的问题。转轴机构（110）包括基座（111）和摆臂门板件（115），摆臂门板件（115）可转动地连接于基座（111）；摆臂门板件（115）包括成型为一体的第一成型部（11）和第二成型部（12）；第一成型部（11）开设有多个连接孔（K1），相邻的连接孔（K1）之间具有分隔部（16）；第二成型部（12）包括主体部（14）和连接于主体部（14）的多个连接部（15），相邻的连接部（15）之间具有分隔槽（C1）；多个连接部（15）分别成型于多个连接孔（K1），分隔槽（C1）与分隔部（16）相配合。该转轴机构（110）的摆臂（113）和门板（112）结合可靠且相对位置精度较高。还提供一种可折叠设备（100）及转轴机构（110）的制备方法。

Description

转轴机构、可折叠设备及转轴机构的制备方法
相关专利的交叉引用
本申请要求在2023年11月13日提交中国专利局、申请号为202311519390.9、申请名称为“转轴机构、可折叠设备及转轴机构的制备方法”的中国专利的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及结构成型领域，具体而言，涉及转轴机构、可折叠设备及转轴机构的制备方法。
背景技术
转轴机构是折叠手机等可折叠设备中实现折叠的主要结构。转轴机构包括门板和摆臂，门板用于支撑可折叠设备的柔性屏，摆臂用于和其他结构形成转动副，实现相对转动。
一些已知的转轴机构，门板和摆臂分别加工成型，然后通过焊接、粘接等方式连接在一起。然而，这种加工方式得到的结构，摆臂和门板的相对位置难以保证，从而可能导致摆臂与其他结构的转动配合卡滞，影响转轴机构的使用体验。
发明内容
本申请提供转轴机构、可折叠设备及转轴机构的制备方法，以解决已知的转轴机构的摆臂门板件中摆臂和门板的相对位置精度难以保证的问题。
第一方面，本申请的实施例提供一种转轴机构，包括基座和摆臂门板件，摆臂门板件可转动地连接于基座；摆臂门板件包括成型为一体的第一成型部和第二成型部；第一成型部开设有多个连接孔，相邻的连接孔之间具有分隔部；第二成型部包括主体部和连接于主体部的多个连接部，相邻的连接部之间具有分隔槽；多个连接部分别成型于多个连接孔，分隔槽与分隔部相配合。
该实施方式中的转轴机构的摆臂门板件的第一成型部和第二成型部，通过间隔的连接部成型于分隔部的两侧，能够分别以分隔部为基准收缩，确保连接部与门板的相对位置准确，利于确保成型的摆臂门板件的结构精度，确保摆臂门板件与基座或其他部件之间的精确配合，确保转轴机构旋转顺滑不卡滞。
在一种可能的实施方式中，第一成型部朝向第二成型部的一侧表面为第一表面，第一表面设有凸台，连接孔位于凸台的外轮廓内侧。第二成型部具有第二表面，第二表面设有凹槽，连接部凸设于凹槽的槽底面。凸台与凹槽相配合，且凸台和凹槽在平行于第一表面的平面内的投影为非圆形。
该实施方式中，在第一成型部和第二成型部结合成一体时，非圆形的凸台和凹槽的配合限位能够进一步限制第二成型部相对第一成型部在平行于第一表面的平面内的位移，以及限制两者绕平行于第一方向的轴线转动。同时，通过凸台加厚了第一成型部连接第二成型部之处的厚度尺寸，利于提高该处的结构强度和刚度，降低第一成型部该处受力变形或破坏的可能。同时，第二成型部设置凹槽来容置凸台，减小了整体结构沿厚度方向尺寸的占用，利于结构小型化设计。
在一种可能的实施方式中，凹槽的槽底面对应于分隔槽的位置设有凹孔。凸台对应于分隔部的位置设有凸柱，凸柱与凹孔相配合。
该实施方式中，通过凹孔和凸柱的配合，能够实现第一成型部和第二成型部的定位和紧固，进一步提高第一成型部和第二成型部的结合牢固程度。并且，在第二成型部二次成型于第一成型部时，第二成型部材料的收缩会使得其凹孔周围的材料收缩包紧凸柱，进一步提高了第二成型部对第一成型部的结合牢固程度。
在一种可能的实施方式中，凸台和凹槽在平行于第一表面的平面内的投影为多边形，且多边形的至少部分折角处设置圆角或倒角。
该实施方式中，多边形的凸台和凹槽能够实现第二方向和第三方向的相互限位以及限制绕平行第一方向的轴线旋转，折角处设置圆角或倒角过渡，能够降低折角处的应力集中，降低折角处变形开裂的问题。
在一种可能的实施方式中，第一成型部具有第一表面，连接孔包括第一孔段和第二孔段，第一孔段从第一表面凹入，第二孔段连通于第一孔段远离第一表面的一端，第二孔段的截面大于第一孔段。第二成型部具有第二表面，连接部包括第一连接段和第二连接段，第一连接段凸设于主体部的第二表面，第二连接段连接于第一连接段远离主体部的一端。第一连接段与第一孔段相配合，第二连接段与第二孔段相配合。
该实施方式中，主体部和T形的连接部连接成工字形，在门板和摆臂二次成型时，摆臂的成型材料沿第一方向收缩形成抱紧力，将使夹于工字形的第二成型部的主体部和第二连接段之间的部分可靠地结合于第一成型部，确保两者的结合牢固程度，且能够可靠地限止第二成型部相对第一成型部沿第一方向的位移，提高两者的一体性和结构尺寸精度。
在一种可能的实施方式中，第一孔段的深度方向的两端面处的边线设置圆角或倒角过渡；和/或，第二孔段靠近第一孔段一端的边线设置圆角或倒角过渡。
该实施方式中，通过在第一孔段和第二孔段的边线处圆角或倒角过渡，一方面可增大连接部和连接孔的接触和结合面积，另一方面能够减小折角处应力集中，降低了成型的摆臂门板件在结合处收缩开裂的问题。
在一种可能的实施方式中，连接孔的深度方向沿第一方向，多个连接孔沿第二方向间隔分布。连接孔沿第二方向的两个侧面之间连接有条形部，条形部位于连接孔沿第一方向靠近第二成型部一侧。连接部设有条形孔，条形部与条形孔相配合。
该实施方式中，二次成型于第一成型部的第二成型部，其条形孔各侧孔面包围条形部，从而在第一方向和第三方向(第三方向垂直于第一方向和第二方向)限位于第一成型部，同时连接部和连接孔沿第二方向端面的限位，可实现第二成型部和第一成型部在第二方向的限位。此外，设置沿第二方向的条形部与第二成型部结合，能够实现第一成型部和第二成型部沿第二方向的定位导向，确保两者结合后沿第二方向的方向一致性。
在一种可能的实施方式中，门板的长度方向为第二方向，连接孔呈沿第二方向延伸的长条形。
该实施方式中，通过使连接孔呈沿第二方向的长条形，连接孔和连接部的配合能够限制第二成型部绕平行于第一方向的轴线相对第一成型部旋转，从而确保第一成型部和第二成型部的相对方向的一致性，保证第二成型部第一成型部件的尺寸精度和一体化程度。
在一种可能的实施方式中，第一成型部包括门板，第二成型部包括摆臂。
该实施方式中，摆臂门板件划分为门板和摆臂。
在一种可能的实施方式中，门板的厚度方向为第一方向，门板的长度方向为第二方向。门板具有第一表面，第一表面垂直于第一方向，第一表面凸设有凸台；门板设有两个沿第二 方向间隔的连接孔，两个连接孔之间具有分隔部；连接孔位于凸台的外轮廓内侧，并沿厚度方向贯通门板；凸台对应分隔部的位置设有凸柱。摆臂包括主体部和两个连接部，主体部包括旋转臂，旋转臂用于转动配合于基座；主体部具有第二表面，且主体部具有从第二表面内凹的凹槽，两个连接部分别凸设于凹槽的槽底面，且两个连接部沿第二方向间隔，两个连接部之间具有分隔槽；分隔槽的槽底面设有凹孔。摆臂通过二次成型的方式一体成型于门板，且第二表面叠合于第一表面，凸台与凹槽相配合，凸柱与凹孔相配合，两个连接部分别与两个连接孔相配合，且两个连接部夹于分隔部和凸柱两侧。
该实施方式中，通过凸台和凹槽的配合、凸柱和凹孔的配合、两个连接部和两个连接孔的配合以及分隔部作为两个连接部的成型基准，能够极大提高门板和摆臂的一体性和相对位置精度。
在一种可能的实施方式中，摆臂门板件包括多个子结构段，各个子结构段分别包括门板段和摆臂，门板段沿第二方向延伸，多个门板段沿第二方向连接；第一成型部包括多个子结构段中的一部分子结构段，第二成型部包括多个子结构段的另一部分子结构段。
该实施方式中，摆臂门板件划分为多个子结构段，适于长度较大的摆臂门板件的成型。
在一种可能的实施方式中，子结构段有三个，位于中间的子结构段为第一子结构段，位于两侧的两个子结构段为第二子结构段；第一成型部包括第一子结构段，第二成型部包括第二子结构段；第一子结构段的门板段沿第二方向的两端分别设有第一叠合段，第一叠合段的厚度小于门板的厚度；第一叠合段开设有两个连接孔，两个连接孔沿第二方向间隔，两个连接孔之间具有分隔部；第二子结构段的门板段靠近第一子结构段的一端设有第二叠合段，第二叠合段朝向第一叠合段的一侧表面凸设有两个连接部，两个连接部沿第二方向间隔，两个连接部之间具有分隔槽；第二叠合段沿厚度方向与第一叠合段叠合，且两个连接部分别与两个连接孔相配合，分隔部与分隔槽相配合，两个连接部分别夹于分隔部两侧。
该实施方式中，通过两个连接部和两个连接孔的配合以及分隔部作为两个连接部的成型基准，能够极大提高多个子结构段的一体性和相对位置精度。
第二方面，本申请的实施例提供一种可折叠设备，其包括中框、柔性屏和前述的转轴机构。中框转动连接于摆臂门板件；柔性屏覆盖于中框和转轴机构，并支撑于摆臂门板件。
本实施例中的可折叠设备采用前述的转轴机构，结构强度高、尺寸精度和一体化程度高。
第三方面，本申请的实施例提供一种转轴机构的制备方法，用于制备前述的转轴机构，转轴机构的制备方法包括制备摆臂门板件，制备摆臂门板件包括：
制备第一成型部；
在第一成型部上通过二次成型工艺形成第二成型部，以使第二成型部与第一成型部成型为一体的摆臂门板件，且成型的第二成型部的相邻连接部夹于分隔部两侧。
本实施例中的转轴机构的制备方法，第二成型部成型于第一成型部，且两者通过多个连接孔和多个连接部结合，能够实现相互限位且结合强度高，并且，条形的连接孔和连接部的配合能够限制第二成型部绕平行于第一方向的轴线相对第一成型部旋转，从而确保第一成型部和第二成型部的相对方向的一致性，保证转轴机构的尺寸精度和一体化程度。
在一种可能的实施方式中，
第一成型部包括门板，第二成型部包括摆臂；先成型门板，然后在门板上二次成型摆臂，或者，
摆臂门板件包括多个子结构段，各个子结构段分别包括门板段和摆臂，门板段沿第二方 向延伸，多个门板段沿第二方向连接；第一成型部包括多个子结构段中的一部分子结构段，第二成型部包括多个子结构段的另一部分子结构段；先成型第一成型部的子结构段，再在第一成型部的子结构段上成型第二成型部的子结构段。
该实施方式中，摆臂门板件可以以两种不同的划分方式划分和成型。
在一种可能的实施方式中，第二成型部采用的成型材料为MIM类金属、非晶类金属、塑胶或Peek类材质，第二成型部通过MIM工艺、非晶成型工艺或注塑成型工艺一体成型于第一成型部。
该实施方式中，第一成型部可以采用各种材料、各种二次成型工艺成型。
在一种可能的实施方式中，第一成型部采用的成型材质为MIM类金属、冲压类金属、3D打印类金属或非晶类金属，第一成型部通过MIM工艺、3D打印成型工艺、冲锻成型工艺、CNC加工工艺或非晶成型工艺成型。
该实施方式中，第一成型部可以采用各种材料、各种成型工艺制成。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请实施例的可折叠设备展开时的三维视图；
图2为图1的可折叠设备折叠时的三维视图；
图3为图1的可折叠设备沿A-A线的剖视图；
图4为图2的可折叠设备沿B-B线的剖视图；
图5为本申请实施例的摆臂门板件的结构图；
图6为本申请实施例的门板的结构图；
图7为本申请实施例的摆臂的结构图；
图8为图7的C处放大图；
图9为图8的仰视图；
图10为图6的门板和图7的摆臂结合处的剖视图；
图11为本申请实施例的门板的另一实施方式的局部图；
图12为图11沿D-D线的剖视图；
图13为本申请实施例的摆臂的另一实施方式的结构图；
图14为本申请实施例的门板的再一实施方式的局部图；
图15为图14的仰视图；
图16为图13的摆臂和图14或图15的门板结合处的剖视图；
图17为本申请实施例的摆臂门板件的另一划分形式的示意图；
图18为图17中的相邻子结构段的连接处的展开视图；
图19为图17中的相邻子结构段连接处的剖视图。
主要元件符号说明：
可折叠设备            100
第一中框              101
第二中框              102
柔性屏               103
转轴机构             110
基座                 111
门板                 112
摆臂                 113
摆臂门板件           115
第一成型部           11
第二成型部           12
旋转臂               13
主体部               14
连接部               15
分隔部               16
凸台                 17
凸柱                 18
圆角                 19
倒角                 20
条形部               21
子结构段             22
第一子结构段         22a
第二子结构段         22b
门板段               23
第一叠合段           24a
第二叠合段           24b
第一连接段           25
第二连接段           26
连接孔               K1
第一孔段             K2
第二孔段             K3
凹孔                 K4
条形孔               K5
分隔槽               C1
凹槽                 C2
第一方向             Z
第二方向             X
第三方向             Y
第一表面             P1
第二表面             P2
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。当一个元件被认为是“设置于”另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、 “右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施方式及实施方式中的特征可以相互组合。
实施例
可折叠设备，如一些可折叠的手机、平板电脑等，通过转轴机构实现折叠或展开。
图1和图2示出了一种可折叠设备100，其具体为一可折叠的手机。可折叠设备100主要包括两个中框(分别命名为第一中框101和第二中框102)、柔性屏103和转轴机构110。第一中框101和第二中框102分别连接于转轴机构110的两侧，柔性屏103覆盖在第一中框101、转轴机构110和第二中框102上。通过转轴机构110，该可折叠设备100的第一中框101和第二中框102可相对展开或折叠，同时带动柔性屏103展开或折叠。可折叠设备100的展开状态请参见图1，折叠状态请参见图2。
图1和图2示出的可折叠设备100为外折设备，即折叠后的柔性屏103位于第一中框101和第二中框102的外侧。在其他实施例中，该可折叠设备100也可以为内折设备，即折叠后柔性屏103位于第一中框101和第二中框102之间。
在其他实施例中，可折叠设备100也可以是能够进行两次或两次以上折叠的设备，在此不做限定。
配合参见图3和图4，本实施例中，转轴机构110包括基座111和两个摆臂门板件115，两个摆臂门板件115分别连接于基座111的两侧，并用于分别连接第一中框101和第二中框102。
配合参见图5，本实施例中的摆臂门板件115具有一体的门板112和摆臂113，摆臂113用于可转动地配合于基座111，门板112用于支撑可折叠设备100的柔性屏103。
本实施例中，摆臂门板件115与中框和基座111分别转动配合形成转动副，通过这些转动副，在柔性屏103的展开状态下(见图3)，两个门板112共面地支撑展开的柔性屏103；在柔性屏103的折叠状态下(见图4)，两个门板112相对基座111转动一定角度，从而可靠支撑折弯后的柔性屏103，利于适配柔性屏103不同状态的支撑。
再次参见图5，本实施例中，摆臂门板件115包括门板112和多个摆臂113(图中为三个)。门板112为沿第二方向X延伸的长条形板状结构，且厚度方向沿第一方向Z。门板112用于支撑柔性屏103。多个摆臂113沿第二方向X依次间隔地成型于门板112，用于与其他构件形成旋转副。
图5中的摆臂113为双旋摆臂，由两个摆臂部分一体成型，双旋摆臂的一侧用于转动连接基座111、另一侧用于转动连接第一中框101/第二中框102，从而形成两个转动副。
图5示出的摆臂门板件115作为单一结构件用于转轴机构110，能够减小转轴机构110的装配零件数量，且能够降低门板112和摆臂113之间组装误差对转轴机构110的转动精度的影响。并且，通过一体成型，还可以减小门板112和摆臂113的额外连接需求带来的转轴机构110的厚度增加，利于转轴机构110乃至可折叠设备100整体厚度的减薄设计。
而一些已知技术中，转轴机构的摆臂和门板采用分别成型后连接的方式得到，即，先分 别单独成型得到门板和摆臂，然后将门板和摆臂通过焊接或点胶连接在一起。这种摆臂和门板分体设计成型后连接的方式，对单体零件精度要求较高，尤其单体零件的连接处的尺寸需要精确适配，制造成本较高。并且，通过焊接或点胶连接的连接方式，较难确保单体零件之间的相对位置精度，从而使得摆臂门板组合结构两侧的转动副精度难以保证，装配后的转轴机构容易卡滞，影响转轴机构的良率。
图5示出的摆臂门板件115，作为一个一体的结构件可以由两个或两个以上的成型部分构成。例如，摆臂门板件115包括两个成型部分，分别命名为第一成型部11和第二成型部12。摆臂门板件115的第一成型部11和第二成型部12划分可以根据需要确定。
例如，图6-图10示出了摆臂门板件115的第一种划分方式；图17-图19示出了摆臂门板件115的另一种划分方式，下面将分别介绍。
参见图6和图7，该实施方式中，摆臂门板件115的第一成型部11为图7中的门板112，第二成型部12为图6中的摆臂113。
该摆臂门板件115在制造时，可以先成型门板112，后通过二次成型的方式在门板112上成型三个摆臂113，从而形成一体的摆臂门板件115；也可以先成型三个摆臂113，后通过二次成型的方式在三个摆臂113上成型门板112，从而形成一体的摆臂门板件115。
在其他实施例中，摆臂113的数量也可以根据需要设置为其他数量，在此不做限定。
在其他实施例中，摆臂113也可以仅包括一侧摆臂部分，使其仅形成一个旋转副。摆臂113也可以替换为其他附接在门板112上的结构。
为确保门板112和摆臂113的可靠结合，本实施例中，在门板112和摆臂113上分别设置有用于相互配合的部分。
配合参见图8和图9，门板112为长条形板状结构，门板112沿厚度方向(即第一方向Z)朝向摆臂113的一侧表面为第一表面P1，第一表面P1凸设的凸台17。凸台17的在平行于第一表面P1的平面内的外轮廓的形状为非圆形，例如为多边形。门板112在凸台17外轮廓内侧的部分开设有两个连接孔K1，两个连接孔K1分别沿第一方向Z贯通门板112。两个连接孔K1沿门板112的长度方向(即第二方向X)间隔，使两个连接孔K1之间限定分隔部16。可选地，相邻的连接孔K1沿门板112的宽度方向(即第三方向Y)错开。
凸台17对应于分隔部16的位置凸设有凸柱18。可选地，凸柱18的最大外形尺寸设置在1.0mm以内。凸柱18可以为圆柱、棱柱或异形柱状结构。
本实施例中，连接孔K1包括第一孔段K2和第二孔段K3，第一孔段K2从第一表面P1凹入，第二孔段K3连通于第一孔段K2远离第一表面P1的一端，第二孔段K3的截面大于第一孔段K2，以使连接孔K1呈T形。其中，第一孔段K2的形状和第二孔段K3的形状可以相同或不同，例如图8和图9中示出的，第一孔段K2为腰圆形，第二孔段K3为矩形和单侧半圆结合的形状。
对应地，如图6示出的摆臂113包括主体部14和两个连接部15。主体部14包括两个旋转臂13，用于分别转动配合于基座111和中框。主体部14具有第二表面P2，且主体部14具有从第二表面P2凹设的凹槽C2，两个连接部15分别凸设于凹槽C2的槽底面，且两个连接部15沿第二方向X间隔，两个连接部15之间限定分隔槽C1；分隔槽C1的槽底面设有内凹的凹孔K4。
连接部15呈T形(结合参见图10)，连接部15和主体部14构成工字形结构。连接部15包括第一连接段25和第二连接段26，第一连接段25连接于主体部14，第二连接段26连接 于第一连接段25远离主体部14的一端。
图10示出了图6的摆臂113一体成型于图7-图9的门板112后的状态。
参见图10，摆臂113通过二次成型的方式一体成型于门板112，第二表面P2叠合于第一表面P1，凸台17配合于凹槽C2，凸柱18配合于凹孔K4，两个连接部15分别配合于两个连接孔K1，且两个连接部15夹于分隔部16和凸柱18两侧。其中，连接部15的第一连接段25配合于连接孔K1的第一孔段K2，连接部15的第二连接段26配合于连接孔K1的第二孔段K3。
该摆臂门板件115中，连接部15配合于连接孔K1内，以使摆臂113和门板112结合成一体并形成相互限位，确保门板112和摆臂113之间可靠结合。通过主体部14和T形的连接部15构成的工字形结构来配合门板112，在摆臂113二次成型于门板112时，摆臂113的成型材料沿第一方向Z收缩形成抱紧力，将使夹于摆臂113的第二表面P2和第二连接段26之间的部分可靠地结合于门板112，确保两者的结合牢固程度，且能够可靠地限止摆臂113相对门板112沿第一方向Z的位移，提高两者的一体性和结构尺寸精度。
对于连接孔K1呈沿门板112的长度方向(即第二方向X)延伸的长条形的实施方式，连接孔K1和连接部15的配合能够限制摆臂113绕平行于第一方向Z的轴线相对门板112旋转，从而确保门板112和摆臂113的相对方向的一致性，保证摆臂门板件115的尺寸精度和一体化程度。
通过间隔设置的两个连接孔K1来配合摆臂113的两个连接部15，能够进一步挺高摆臂113和门板112的连接可靠性。同时，连接孔K1间的分隔部16配合在分隔槽C1中，能够进一步提高门板112对摆臂113沿第二方向X的限制作用。并且，位于中间的分隔部16能够限制摆臂113相对门板112沿第二方向X向左或向右的位移，限位效果更佳。同时，两侧的连接部15成型于分隔部16的两侧，在成型时能够分别以分隔部16为基准收缩，确保连接部15与门板112的相对位置准确，利于确保成型的摆臂门板件115的结构精度，确保摆臂门板件115与基座111或其中框的精确配合，确保转轴机构110旋转顺滑不容易卡滞。
多边形的凸台17和凹槽C2的配合限位能够进一步限制摆臂113相对门板112沿第二方向X或第三方向Y的位移，以及限制两者绕平行于第一方向Z的轴线转动。并且通过设置凸台17，加厚了门板112连接摆臂113之处的厚度尺寸，利于提高该处的结构强度和刚度，降低门板112该处受力变形或破坏的可能。同时，摆臂113设置凹槽C2来容置凸台17，减小了整体结构沿厚度方向的尺寸占用，利于结构小型化设计。
通过凹孔K4和凸柱18的配合，能够实现门板112和摆臂113在第二方向X和第三方向Y的定位和紧固，进一步提高门板112和摆臂113的结合牢固程度。并且，在摆臂113二次成型于门板112时，摆臂113的材料收缩会使得其凹孔K4周围的材料收缩沿第二方向X和第三方向Y包紧凸柱18，进一步提高了摆臂113和门板112的结合牢固程度。
相邻的连接孔K1沿第三方向Y错开设置的实施方式，提高了摆臂113和门板112在第三方向Y的总配合尺寸。同时，非共线的错开设置，还能降低共线情形下两个连接部15绕两者中心转动的程度，提高摆臂113和门板112的相对位置可靠性。
综合上述描述可知，图7-图10示出的摆臂门板件115，其门板112和摆臂113之间除了通过两者接触界面的材料结合力实现相互连接外，还能通过门板112和摆臂113两者之间在第一方向Z、第二方向X、第三方向Y上的相互限位结构以及限制旋转结构来确保两者的相对位置精度并使两者相互抱紧。
并在，对于先成型门板112，再在门板112上二次成型摆臂113的实施方式，先成型的门板112上的分隔部16和凸柱18可以作为摆臂113的成型基准，使得二次成型摆臂113时，摆臂113的两个连接部15均以分隔部16为基准相向收缩，确保成型后的摆臂113与门板112之间的相对位置精度。
通过二次成型的方式制造摆臂门板件115，也可降低了门板112和摆臂113结合面处尺寸精度设计要求。
图11和图12示出了门板112的另一种实施方式。图11和图12中的门板112与图8-图9的门板112的不同之处主要在于以下两点：
第一点，图11和图12的门板112中，其多边形的凸台17的外轮廓上的折角处设置圆角19或倒角20过渡。通过圆角19或倒角过渡，一方面可增大凸台17和凹槽C2的接触和结合面积，另一方面能够减小折角处的应力集中，降低了成型的摆臂门板件115在结合处收缩开裂的问题；
第二点，图11和图12的门板112中，第一孔段K2沿第一方向Z两端面处的边线设置圆角19或倒角20过渡，第二孔段K3沿第一方向Z靠近第一孔段K2一端的边线设置圆角19或倒角过渡。通过圆角19或倒角20过渡，一方面可增大连接部15和连接孔K1的接触和结合面积，另一方面能够减小折角处应力集中，降低了成型的摆臂门板件115在结合处收缩开裂的问题。
图13-图16示出的门板112和摆臂113，采用不同于图7-图10的门板112和摆臂113所采用的结合结构。
参见图14和图15，门板112开设有两个沿第二方向X间隔的连接孔K1，该连接孔K1为直孔，例如为长度方向沿第二方向X的矩形截面的直孔。两连接孔K1之间限定分隔部16。在连接孔K1沿第二方向X的两个侧面之间连接有条形部21，条形部21为沿第二方向X延伸的长条形结构，且条形部21位于沿第一方向Z靠近摆臂113一侧。
对应地，参见图13，摆臂113包括主体部14和两个连接部15，两个连接部15沿第二方向X相互间隔并分别一体成型于主体部14。两个连接部15之间限定分隔槽C1，连接部15为矩形块状结构，并具有沿第二方向X延伸的条形孔K5。
参见图16，条形孔K5适配条形部21，连接部15配合于连接孔K1，分隔槽C1配合分隔部16。二次成型于门板112的摆臂113，其条形孔K5各侧孔面包围条形部21，从而在第一方向Z和第三方向Y限位于门板112，同时连接部15和连接孔K1沿第二方向X端面的限位，可实现摆臂113和门板112在第二方向X的限位。此外，设置沿第二方向X的条形部21与摆臂113结合，能够实现门板112和摆臂113沿第二方向X的定位导向，确保两者结合后沿第二方向X的方向一致性。可选地，条形部21在垂直于第二方向X的平面内的截面为方形，如此可限止摆臂113相对门板112绕平行于第二方向X的转轴转动，确保了门板112和摆臂113的一体性和结合牢固程度。
同时，图13-图16示出的实施方式，其门板112同样可设置凸柱18来配合摆臂113的凹孔K4，具体可参见图7-图10的对应描述，在此不赘述。
图17-图19示出了图5的摆臂门板件115的第二种划分形式。
参见图17，摆臂门板件115包括多个子结构段22(如图17示出的三个子结构段22)，子结构段22包括门板段23和一体设置于门板段23的摆臂113，门板段23和摆臂113可以采用同种材料一体成型，如铸造成型、3D打印成型等，也可以通过相同或不同材料二次成型。 多个门板段23沿第二方向X结合，从而形成图5示出的摆臂门板件115。相邻的子结构段22中的一个作为第一成型部11，另一个作为第二成型部12。
示例性地，图17中，中间的子结构段22为第一子结构段22a，两侧的子结构段22为第二子结构段22b。第一子结构段22a作为第一成型部11先成型，第二子结构段22b作为第二成型部12，通过二次成型的方式成型于第一子结构段22a。
第一子结构段22a的门板段23和第二子结构段22b的门板段23之间的连接方式见于图18和图19。
配合参见图18和图19，第一子结构段22a的门板段23沿第二方向X的端部设有第一叠合段24a，第一叠合段24a的厚度小于门板段23的厚度；第一叠合段24a开设有两个连接孔K1，两个连接孔K1沿第二方向X间隔，两个连接孔K1之间限定分隔部16。
第二子结构段22b的门板段23靠近第一子结构段22a的一端设有第二叠合段24b，第二叠合段24b朝向第一叠合段24a的一侧表面凸设有两个连接部15，两个连接部15沿第二方向X间隔并在两者之间限定分隔槽C1。
第二叠合段24b沿厚度方向与第一叠合段24a叠合，且两个连接部15分别配合于两个连接孔K1，分隔部16配合于分隔槽C1，两个连接部15分别夹于分隔部16两侧。
可选地，两个第一叠合段24a和第二叠合段24b叠合后的总厚度(沿第一方向Z的尺寸)等于门板段23的板厚。如此，成型后的摆臂门板件115，其门板112的厚度在长度方向保持一致。
该实施方式中的连接孔K1的形状和连接部15的形状可以参考图7-图10示出的实施方式。即，该实施方式中的连接孔K1可以设置为T形孔，对应地，连接部15呈适配该连接孔K1的T形，且连接部15和第二叠合段24b连接形成工字形结构。
通过连接部15和第二叠合段24b连接形成工字形，结合T形的连接孔K1，两第一叠合段24a和第二叠合段24b能够可靠地在第一方向Z、第二方向X和第三方向Y相互限位，确保两者结合形成的摆臂门板件115具有较高的一体性和结构精度。连接成工字形的第二叠合段24b和连接部15，通过二次成型工艺成型于第一子结构段22a时，还能够通过材料的收缩来抱紧另一子结构段22，能够进一步提高两者的结合可靠性。
在其他实施例中，连接孔K1也可以设为锥形孔，对应地，连接部15设置为倒锥形。通过锥形孔和倒锥形的配合，利于第一叠合段24a和第二叠合段24b相互抱紧。
本实施例中，通过第一成型部11和第二成型部12一体成型形成摆臂门板件115的方式，除了用于前述摆臂门板件115外，还可以用于可折叠设备100的门板、轴盖、支撑板或其他结构，也可以用于其他产品的结构件，在此不做限定。
本实施例还提供转轴机构的制备方法，用于制备前述转轴机构110。
结合前述附图，本实施例中的转轴机构110的制备方法包括：
制备第一成型部11；
在第一成型部11上二次成型形成第二成型部12，以使第二成型部12与第一成型部11成型为一体的摆臂门板件115，且成型的第二成型部12的相邻连接部15夹于分隔部16两侧。
可选地，第一成型部11通过MIM(Metal Injection Molding，金属注射成型)工艺、3D打印成型工艺、冲锻成型工艺、CNC(Computer Numerical Control，计算机数字控制)加工工艺或非晶成型工艺成型；第一成型部11采用的成型材质为MIM类金属、冲压类金属、3D打印类金属或非晶类金属；
可选地，第二成型部12通过MIM工艺、非晶成型工艺或注塑成型工艺一体成型于第一成型部11；第二成型部12采用的成型材料为MIM类金属、非晶类金属、塑胶或Peek(聚醚醚酮)类材质。
摆臂门板件115可采用多次成型的方式制得。根据各成型部的划分、成型次序不同，可选用多种制备方法，下文将示例性地介绍。
第一种制备方法：
摆臂门板件115被划分为门板112和多个摆臂113。将摆臂门板件115的门板112作为第一成型部11，通过一次成型制备；摆臂113作为第二成型部12，通过二次成型工艺成型在门板112上，从而得到一体的摆臂门板件115。
一次成型中，门板112的成型材料可以为不锈钢、钛合金等，成型方法可以为MIM成型、3D打印成型、精密铸造成型、冲锻后CNC加工成型、非晶成型等。门板112用于与摆臂113结合的结构(如前述的连接孔K1)可以在一次成型中直接成型于门板112上，也可以在一次成型后通过后制程(如CNC加工)加工于门板112上。
二次成型中，摆臂113可采用二次MIM成型、二次真空压铸、二次注塑成型等方式成型于门板112上。二次成型的材料可以与一次成型的材料相同，也可以不同。
结合前述设计为工字形的摆臂113和带T字形的连接孔K1的门板112的配合，以及双连接部15、凸台17、凸柱18等结构设计，在摆臂113成型于门板112后，摆臂113与门板112之间形成双孔定位柱错层结构，能够实现第一方向Z、第二方向X和第三方向Y的相互定位和连接，还能够实现防相对旋转能功能，且成型的摆臂113的两个连接部15分别以分隔部16为基准收缩，能够得到可靠性和精度均较高的摆臂门板件115。
第二种制备方法：
相对第一种制备方法，调换了门板112和摆臂113的成型次序，多个摆臂113作为第一成型部11一次成型；然后在多个摆臂113上二次成型得到作为第二成型部12的门板112，从而得到一体的摆臂门板件115。
第三种制备方法：
相对第一种制备方法，改变摆臂门板件115的划分方式，将摆臂门板件115沿长度方向(即第二方向X)划分为多个子结构段22。首先一次成型一个或几个子结构段22(定义为第一子结构段22a)，然后在已成型的子结构段22的基础上，二次成型出剩下的子结构段22(定义为第二子结构段22b)。例如采用图17中的方式，将摆臂门板件115划分为三个子结构段22，一次成型时，先成型中间的子结构段22(即第一子结构段22a)，然后再在中间的子结构段22上二次成型出左边的子结构段22(即第二子结构段22b)和右边的子结构段22(即第二子结构段22b)，从而得到一体的摆臂门板件115。该处的“左边”、“中间”、“右边”以图17中的状态描述。
相邻的第一子结构段22a和第二子结构段22b通过第一叠合段24a的两连接孔K1和第二叠合段24b的两连接部15结合，能够实现可靠结合。在连接位置可能存在清晰的分界线。
其中，一次成型可以采用MIM工艺，得到的第一子结构段22a的长度(沿第二方向X的尺寸)可限定为小于70.0mm。
该制备方法适用于长度大于60.0mm的摆臂门板件115。
在摆臂门板件115厚度较小，无法在厚度上分层为第一叠合段24a和第二叠合段24b时，可直接使第一子结构段22a和第二子结构段22b的长向端面结合，再通过额外的焊接等方式 加强结合强度。
在其他实施例中，摆臂门板件115还可以采用其他制备方法，例如通过如不锈钢、钛合金、锆基非晶合金等材料单次成型而得，得到的摆臂门板件115的各部分无明显分界线或分界面。单次成型的方式可以为MIM成型、非晶成型、3D打印成型、精密铸造等。
综合以上描述，本申请实施例中的转轴机构110，其第一成型部11和第二成型部12结合强度较高且通过第一成型部11的分隔部16作为基准二次成型出的第二成型部12的相邻连接部15，能够确保摆臂113和门板112之间具有更高的相对位置精度，利于转轴机构110与其他结构的转动配合顺滑而不易卡滞。
以上实施方式仅用以说明本申请的技术方案而非限制，尽管参照以上较佳实施方式对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换都不应脱离本申请技术方案的精神和范围。

Claims (17)

  1. 一种转轴机构，其特征在于：
    包括基座和摆臂门板件，所述摆臂门板件可转动地连接于所述基座；
    所述摆臂门板件包括成型为一体的第一成型部和第二成型部；
    所述第一成型部开设有多个连接孔，相邻的所述连接孔之间具有分隔部；
    所述第二成型部包括主体部和连接于所述主体部的多个连接部，相邻的所述连接部之间具有分隔槽；多个所述连接部分别成型于多个所述连接孔，所述分隔槽与所述分隔部相配合。
  2. 根据权利要求1所述的转轴机构，其特征在于：
    所述第一成型部朝向所述第二成型部的一侧表面为第一表面，所述第一表面设有凸台，所述连接孔位于所述凸台的外轮廓内侧；
    所述第二成型部具有第二表面，所述第二表面设有凹槽，所述连接部凸设于所述凹槽的槽底面；
    所述凸台与所述凹槽相配合，且所述凸台和所述凹槽在平行于所述第一表面的平面内的投影为非圆形。
  3. 根据权利要求2所述的转轴机构，其特征在于：
    所述凹槽的槽底面对应于所述分隔槽的位置设有凹孔；
    所述凸台对应于所述分隔部的位置设有凸柱，所述凸柱与所述凹孔相配合。
  4. 根据权利要求2所述的转轴机构，其特征在于：
    所述凸台和所述凹槽在平行于所述第一表面的平面内的投影为多边形，且多边形的至少部分折角处设置圆角或倒角。
  5. 根据权利要求1所述的转轴机构，其特征在于：
    所述第一成型部具有第一表面，所述连接孔包括第一孔段和第二孔段，所述第一孔段从所述第一表面凹入，所述第二孔段连通于所述第一孔段远离所述第一表面的一端，所述第二孔段的截面大于所述第一孔段；
    所述第二成型部具有第二表面，所述连接部包括第一连接段和第二连接段，所述第一连接段凸设于所述主体部的第二表面，所述第二连接段连接于所述第一连接段远离所述主体部的一端；
    所述第一连接段与所述第一孔段相配合，所述第二连接段与所述第二孔段相配合。
  6. 根据权利要求5所述的转轴机构，其特征在于：
    所述第一孔段的深度方向的两端面处的边线设置圆角或倒角过渡；和/或，所述第二孔段靠近所述第一孔段一端的边线设置圆角或倒角过渡。
  7. 根据权利要求1所述的转轴机构，其特征在于：
    所述连接孔的深度方向沿第一方向，多个所述连接孔沿第二方向间隔分布；
    所述连接孔沿所述第二方向的两个侧面之间连接有条形部，所述条形部位于所述连接孔沿所述第一方向靠近所述第二成型部一侧；
    所述连接部设有条形孔，所述条形部与所述条形孔相配合。
  8. 根据权利要求1所述的转轴机构，其特征在于：
    所述门板的长度方向为第二方向，所述连接孔呈沿所述第二方向延伸的长条形。
  9. 根据权利要求1-8任一项所述的转轴机构，其特征在于：
    所述第一成型部包括门板，所述第二成型部包括摆臂。
  10. 根据权利要求9所述的转轴机构，其特征在于：
    所述门板的厚度方向为第一方向，所述门板的长度方向为第二方向；
    所述门板具有第一表面，所述第一表面垂直于所述第一方向，所述第一表面凸设有凸台；所述门板设有两个沿所述第二方向间隔的连接孔，两个所述连接孔之间具有所述分隔部；所述连接孔位于所述凸台的外轮廓内侧，并沿厚度方向贯通所述门板；所述凸台对应所述分隔部的位置设有凸柱；
    所述摆臂包括主体部和两个连接部，所述主体部包括旋转臂，所述旋转臂用于转动配合于所述基座；所述主体部具有第二表面，且所述主体部具有从所述第二表面内凹的凹槽，两个所述连接部分别凸设于所述凹槽的槽底面，且两个所述连接部沿所述第二方向间隔，两个所述连接部之间具有分隔槽；所述分隔槽的槽底面设有凹孔；
    所述摆臂通过二次成型的方式一体成型于所述门板，且所述第二表面叠合于所述第一表面，所述凸台与所述凹槽相配合，所述凸柱与所述凹孔相配合，两个所述连接部分别与两个所述连接孔相配合，且两个所述连接部夹于所述分隔部和所述凸柱两侧。
  11. 根据权利要求1-8任一项所述的转轴机构，其特征在于：
    所述摆臂门板件包括多个子结构段，各个所述子结构段分别包括门板段和摆臂，所述门板段沿第二方向延伸，多个所述门板段沿所述第二方向连接；
    所述第一成型部包括多个所述子结构段中的一部分所述子结构段，所述第二成型部包括多个所述子结构段的另一部分所述子结构段。
  12. 根据权利要求11所述的转轴机构，其特征在于：
    所述子结构段有三个，位于中间的所述子结构段为第一子结构段，位于两侧的两个所述子结构段为第二子结构段；所述第一成型部包括所述第一子结构段，所述第二成型部包括所述第二子结构段；
    所述第一子结构段的门板段沿所述第二方向的两端分别设有第一叠合段，所述第一叠合段的厚度小于所述门板的厚度；所述第一叠合段开设有两个所述连接孔，两个所述连接孔沿所述第二方向间隔，两个所述连接孔之间具有分隔部；
    所述第二子结构段的门板段靠近所述第一子结构段的一端设有第二叠合段，所述第二叠合段朝向所述第一叠合段的一侧表面凸设有两个所述连接部，两个所述连接部沿所述第二方向间隔，两个所述连接部之间具有分隔槽；
    所述第二叠合段沿厚度方向与所述第一叠合段叠合，且两个所述连接部分别与两个所述连接孔相配合，所述分隔部与所述分隔槽相配合，两个所述连接部分别夹于所述分隔部两侧。
  13. 一种可折叠设备，其特征在于，包括：
    权利要求1-12任一项所述的转轴机构；
    中框，转动连接于所述摆臂门板件；
    柔性屏，覆盖于所述中框和所述转轴机构，并支撑于所述摆臂门板件。
  14. 一种转轴机构的制备方法，其特征在于，用于制备权利要求1-12任一项所述的转轴机构，所述转轴机构的制备方法包括制备所述摆臂门板件，制备所述摆臂门板件包括：
    制备所述第一成型部；
    在所述第一成型部上通过二次成型工艺形成所述第二成型部，以使所述第二成型部与所述第一成型部成型为一体的所述摆臂门板件，且成型的所述第二成型部的相邻所述连接部夹于所述分隔部两侧。
  15. 根据权利要求14所述的转轴机构的制备方法，其特征在于：
    所述第一成型部包括门板，所述第二成型部包括摆臂；先成型所述门板，然后在所述门板上二次成型所述摆臂，或者，
    所述摆臂门板件包括多个子结构段，各个所述子结构段分别包括门板段和摆臂，所述门板段沿第二方向延伸，多个所述门板段沿所述第二方向连接；所述第一成型部包括多个所述子结构段中的一部分所述子结构段，所述第二成型部包括多个所述子结构段的另一部分所述子结构段；先成型所述第一成型部的子结构段，再在所述第一成型部的子结构段上成型所述第二成型部的子结构段。
  16. 根据权利要求14所述的转轴机构的制备方法，其特征在于：
    所述第二成型部采用的成型材料为MIM类金属、非晶类金属、塑胶或Peek类材质，所述第二成型部通过MIM工艺、非晶成型工艺或注塑成型工艺二次成型于所述第一成型部。
  17. 根据权利要求14所述的转轴机构的制备方法，其特征在于：
    所述第一成型部采用的成型材质为MIM类金属、冲压类金属、3D打印类金属或非晶类金属，所述第一成型部通过MIM工艺、3D打印成型工艺、冲锻成型工艺、CNC加工工艺或非晶成型工艺成型。
PCT/CN2024/106203 2023-11-13 2024-07-18 转轴机构、可折叠设备及转轴机构的制备方法 Pending WO2025102797A1 (zh)

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WO2023093226A1 (zh) * 2021-11-29 2023-06-01 荣耀终端有限公司 折叠机构及终端设备
CN219262956U (zh) * 2022-12-16 2023-06-27 荣耀终端有限公司 转轴机构及可折叠电子设备
WO2023143329A1 (zh) * 2022-01-30 2023-08-03 华为技术有限公司 一种转轴机构及电子设备
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