TWI721684B - A hidden type foldable hinge - Google Patents

Abstract

The present invention provides a hidden type foldable hinge, which is utilized two relative lateral surfaces of a curved base, that a first arc-guiding portion and a second arc-guiding portion are disposed among said two lateral surfaces thereof. A first connecting portion of a first rotational member is connected to a first supporting plate, a first curved block of said first rotational member is swung, within limits, in said first arc-guiding portion; a second connecting portion of a second rotational member is connected to a second supporting plate, a second curved block of said second rotational member is swung, within limits, in said second arc-guiding portion; one end of a first torqued rod and one end of a second torqued rod are respectively clamped one lateral of said first rotational member and one lateral of said second rotational member, each of the other lateral for said two torqued rods are respectively provided with a first track and a second track; a gear assembly includes a first gear and a second gear being relatively drove with each other, a first pivotal rod of said first gear and a second pivotal rod of said second gear are respectively moved with said first torqued rod and said second torqued rod in relative.

Description

Concealed split hinge

The invention relates to a hinge, in particular to a concealed split hinge of a foldable electronic device.

In general electronic devices, in traditional folding devices, such as the display and the base of a notebook computer, the sides of the display and the base are connected respectively through a single-spindle hinge to form a pivot, so that the display can be flipped or lifted relative to the base. closure. In recent years, there have been foldable devices that use at least two bodies to replace the traditional display and base, and then use it with a flexible display. Among them, for example, the People’s Republic of China applied for the "Hidden Split Hinge" patent case No. CN 201810371007.2 ( Hereinafter referred to as the previous case 1), one of the embodiments mainly includes a first support, a pair of open shafts, a second support, a multi-axis shaft, and a third support for matching with a flexible The use of a sexual display, by which the first support and the second support connected by the split shaft can be closed through the "single virtual center of rotation" after the whole is folded into an S shape or a Z shape, and in the split type An accommodating space is formed inside the rotating shaft to accommodate the curved area of the flexible display.

After that, as the follow-up improvement of the People’s Republic of China applied for the "hidden split hinge" of CN109488681A (hereinafter referred to as the previous case 2), the structure of "cover plate with swinging piece" was added to bend and flatten the whole In the process, it can produce a free swinging effect similar to a seesaw. When the whole is bent, an accommodating space can be made to accommodate the curved middle part of the flexible display, and when the whole is flattened, the flexible display can be expanded. The flat middle part forms a stable support.

However, whether it is the "single virtual center of rotation" in the previous case 1 or the "shaftless rocker" structure adopted in the previous case 2, the two bodies of the foldable device are closed to each other, so that the inside of the foldable device can be closed. The curved part of the flexible display can form a small curvature, making the overall thinner. However, there are differences in the technological development of various display manufacturers today. Not all the curved parts of the flexible display have a small curvature, or a small curvature It will show different bending behaviors. Therefore, for those flexible displays with different bending behaviors, it is necessary to have a corresponding suitable hinge module for implementation, instead of completely adopting the previous proposals 1 and 2 above. Structural design to reduce the problem of damage to the flexible display. In view of this, in order to provide a structure that is different from the conventional technology and maintain the advantages of the above-mentioned thinness, the inventor has accumulated many years of experience and continuous research and development and improvement, and thus the invention is born.

One of the objectives of the present invention is to provide a hidden split hinge, which can simplify the "rotation axis module" action of the previous case, and change the "single virtual rotation center" of the previous case 1 to "dual virtual rotation center", using two rotations The part rotates synchronously with respect to the arc-shaped seat body to replace the compensation action produced by the "shaftless seesaw" structure; and removes the "shaftless seesaw" structure of the previous case 2 and the compensation action it generates, thereby reducing the overall size The thickness facilitates the design, meets the overall light and thin market demand to promote sales, and extends the service life of the flexible display in response to the small curvature limit of the existing flexible display when it is bent.

In order to achieve the objective of the above invention, the concealed split hinge of the present invention includes an arc-shaped seat body, a first rotating part, a second rotating part, a first torsion bar, a second torsion bar, and a gear group. Wherein, the arc-shaped seat body has two side surfaces facing oppositely, and the two side surfaces have a first arc-shaped guide portion and a second arc-shaped guide portion spaced apart and parallel to each other; the first rotating member includes a first connection Part and a first arc-shaped block, the first connecting part is connected to a first supporting plate, and the first arc-shaped block is confined in the first arc-shaped guiding part in a manner that can swing relatively to the arc; the second rotating member includes a first Two connecting parts and a second arc The second connecting part is connected to a second supporting plate, and the second arc-shaped block is confined in the second arc-shaped guide part in a relatively arc-shaped manner; one end of the first torsion rod clamps the first rotating member One side is used to rub against each other to form a torsion force, the other end of the first torsion bar is provided with a first track; one end of the second torsion bar clamps one side of the second rotating part for mutual friction to form a torsion force, the second torsion bar The other end is provided with a second track; and the gear set has a first gear and a second gear that rotate in opposite directions. The first gear has a first shaft, and the first shaft has a first guiding part for The first rail is limited and moves relative to the first torsion bar; the second tooth member has a second shaft, and the second shaft has a second guiding part for limiting the second rail and move relative to the second torsion bar.

In implementation, the arc-shaped seat body includes an arc-shaped base, a first arc-shaped block, and a second arc-shaped block. The first arc-shaped block and the second arc-shaped block are spaced apart and parallel to each other and connected to the arc-shaped base respectively. A curved block has a first body and at least one first limiting portion. A first arc-shaped guiding portion is formed between the first body and the at least one first limiting portion; the second curved block has a second body And at least one second limiting portion, a second arc-shaped guiding portion is formed between the second body and the at least one second limiting portion.

In implementation, the arc-shaped seat body further includes a first positioning block and a second positioning block. The first positioning block and the second positioning block are arranged side by side and connected to the arc-shaped base respectively. The first positioning block and the second positioning block are pivotally connected to position. The first gear and the second gear, and the first guide portion of the first shaft of the first gear passes through the first positioning block to connect the first track of the first torsion bar, and the second gear of the second gear The second guiding part of the shaft passes through the second positioning block to connect the second torsion rod.

In implementation, one side end of the first positioning block extends laterally with a first end convex portion; one side end of the second positioning block extends laterally with a second end convex portion; so that the first end of the first positioning block is convex The part is connected to the opposite end of the second positioning block, and the second end convex part of the second positioning block is connected to the opposite end of the first positioning block, so that a hollow groove is formed between the two positioning blocks in parallel. The gear positions of the accommodating gear set are geared to rotate.

In implementation, the first positioning block and the second positioning block are arranged with a plurality of holes transversely respectively. The first positioning block is arranged with two first pivot holes on one side of the hollow groove, and the second positioning block is in the hollow Two second pivot holes are arranged on opposite sides of the slot, and the two second pivot holes respectively correspond to the two first pivot holes for pivotally connecting the opposite ends of the first tooth member and the opposite ends of the second tooth member.

In implementation, the first positioning block and the second positioning block are located between the first camber block and the second camber block, and a first accommodating groove is formed between the first positioning block and the first camber block for accommodating the The first torsion bar, and a first lateral convex part protrudes laterally on the opposite side of the first positioning block, so that one side of the first torsion bar is spaced from the opposite side of the first positioning block; the second positioning block and the second arc A second accommodating groove is formed between the face blocks for accommodating the second torsion bar, and a second lateral protrusion is laterally raised on the opposite side of the second positioning block, so that one side of the second torsion bar is in contact with the second positioning block. The opposite side of the block creates a gap.

In implementation, one of the concave surfaces of the arc-shaped base is also provided with at least two positioning square pillars. The first positioning block and the second positioning block are respectively provided with a longitudinal perforation longitudinally through which the at least two positioning square pillars are respectively inserted. Connect and lock.

In implementation, the first rail at the other end of the first torsion rod is an elongated groove formed on the first torsion rod; the first guide portion of the first shaft is at least one formed on the periphery of one end of the first shaft flat.

In implementation, the first torsion bar is formed by superimposing a plurality of first torsion plates.

In implementation, the second track at the other end of the second torsion rod is an elongated groove formed on the second torsion rod; the second guide portion of the second shaft is at least one formed on the periphery of one end of the second shaft flat.

In implementation, the second torsion bar is formed by superimposing a plurality of second torsion plates.

In implementation, the gear set further includes a first intermediate gear and a second intermediate gear that are mutually geared, the first intermediate gear is geared to the first gear, and the second intermediate gear is geared to the second gear; wherein the arc-shaped seat The body further includes a first positioning block and a second positioning block in parallel, and a second positioning block is formed between the two positioning blocks. Hollow slot, the first positioning block is arranged with two first special-shaped long holes on one side of the hollow slot to be located between the two first pivot holes, and the second positioning block is arranged with two on opposite sides of the hollow slot The second special-shaped elongated hole is located between the two second pivot holes, and the two second pivot holes respectively correspond to the two first pivot holes for a first guide part of the first tooth member to penetrate A first pivot hole of the first positioning block is connected to the first rail of the first torsion bar, and a second guide portion of the second tooth member passes through the other of the second positioning block The second pivot hole is used to connect the second track of the second torsion bar. The two second special-shaped long holes correspond to the two first special-shaped long holes respectively for pivotally connecting opposite ends of the first intermediate gear and the second The opposite ends of the intermediate gear.

In implementation, the first rotating member is crossed by a first round pin with a head, thereby forming a first protruding column on one side of the first rotating member, and the first protruding column is clamped by the end of the first torsion bar The first headed round pin has a first non-round head for fitting and positioning on the opposite side of the first rotating part; the second rotating part is driven by a second headed round pin. Passing through horizontally to form a second protruding column on one side of the second rotating member. The second protruding column is clamped by the end of the second torsion bar for mutual rotation and friction to form a torsion force. The second round pin with head It has a second non-circular head for fitting and positioning on the opposite side of the second rotating part.

In implementation, the opposite side of the first rotating member is also recessed with a first embedding groove for the corresponding first non-circular head to fit and position; the opposite side of the second rotating member is also recessed with a second embedding groove for corresponding The second non-circular head is fitted and positioned.

In order to facilitate a more in-depth understanding of the present invention, it is detailed below:

1: Hidden split hinge

2: Curved seat body

21: Curved base

211: Hollow Slot

212: The first accommodating slot

213: second holding tank

214: Positioning square column

22: The first camber block

221: The First Body

222: The first limit part

223: The first arc guide

23: The second camber block

231: The Second Body

232: The second limit part

233: second arc guide

24: The first positioning block

241: first end convex

242: first side convex

243,253: Longitudinal perforation

244: first pivot hole

245: The first special-shaped long hole

246: First transverse perforation

25: The second positioning block

251: second end convex

252: second side convex

254: second pivot hole

255: Second shaped long hole

256: second transverse perforation

3: The first rotating part

31: The first connection part

311: The first boss

312: The first non-round head

313: first slot

32: The first arc block

4: The second rotating part

41: The second connecting part

411: second boss

412: second non-round head

413: second slot

42: second arc block

5: The first torsion bar

51: The first torsion piece

52: The first track

6: The second torsion bar

61: The second torsion piece

62: second track

7: Gear set

71: The first tooth

711: First Helical Gear

712: first shaft

713: first guide

72: second tooth

721: second helical gear

722: second shaft

723: second guide

73: The first intermediate gear

74: second intermediate gear

91: The first support plate

92: The second support plate

93: Flexible display

94: accommodating space

Figure 1 is a schematic diagram of the three-dimensional appearance of the present invention connected to an electronic device.

Figure 2 is an exploded view of some components of the preferred embodiment of the present invention.

Figure 3 is an exploded view of some components of the preferred embodiment of the present invention.

Figure 4 is a top view of the preferred embodiment of the present invention.

Fig. 5 is a cross-sectional view of A-A' in Fig. 4.

Figure 6 is the B-B' cross-sectional view of Figure 4

Figure 7 is a schematic cross-sectional view of the preferred embodiment of the present invention in a half-folded state.

Figure 8 is a schematic cross-sectional view of the preferred embodiment of the present invention when it is fully folded.

Figure 9 is a perspective view of the preferred embodiment of the present invention when folded.

Please refer to Figure 1, which is a preferred embodiment of the hidden split hinge 1 of the present invention, in which the first connecting portion 31 of the first rotating member 3 is connected to a body of an electronic device (such as a display) On the side of the first supporting plate 91, the second connecting portion 41 of the second rotating member 4 is connected to the side of the second supporting plate 92 of another body (for example: a base) of the electronic device, the first supporting plate 91 and the second supporting The board 92 is connected to a flexible display 93 at the same time, so that when the first rotating member 3 and the second rotating member 4 each have a virtual center of rotation to rotate relative to the arc-shaped seat body 2, the two bodies are turned over To fold the flexible display 93.

Please refer to Figures 2 to 6, which is a preferred embodiment of the hidden split hinge 1 of the present invention, which includes an arc-shaped seat body 2, a first rotating part 3, a second rotating part 4, and a first A torsion bar 5, a second torsion bar 6 and a gear set 7.

The arc-shaped seat body 2 includes an arc-shaped base 21, a first arc-surface block 22, a second arc-surface block 23, a first positioning block 24 and a second positioning block 25, the first arc-surface block 22 and the The two arcuate blocks 23 are spaced apart and parallel to each other and are respectively locked on the inner concave surface of the arc-shaped base 21. For example, the two arcuate blocks are respectively provided with longitudinal perforations for inserting the positioning cylinder on the inner concave surface of the arc-shaped base 21. And positioning for easy locking. The first camber block 22 has a first body 221, and the top of the first body 221 has two gradually extending in opposite directions The horizontal protrusion is used as the first limiting portion 222, an arc-shaped slot is formed between the first body 221 and the two first limiting portions 222, and the two first limiting portions 222 are symmetrically arranged in The top edges of the inner walls on opposite sides of the arc-shaped slot are used as the first arc-shaped guide portion 223. The second cambered block 23 has a second body 231. The top of the second body 231 has two horizontal protrusions gradually extending in opposite directions. The horizontal protrusions serve as the second limiting portion 232, the second body 231 and An arc-shaped slot is formed between the two second limiting portions 232, and the two second limiting portions 232 are symmetrically arranged on the top edges of the inner walls on opposite sides of the arc-shaped slot, and the arc-shaped slot is used as the second arc.导导部233. Long grooves penetrate through the inner bottom surface of each arc-shaped groove to facilitate mold opening and subsequent assembly, allowing one end of each rotating member to move relative to each other in the arc-shaped groove of the respective arc-shaped block.

Bearing the upper section, the first positioning block 24 and the second positioning block 25 are located between the first camber block 22 and the second camber block 23, and a first container is formed between the first positioning block 24 and the first camber block 22 The slot 212 is used for accommodating the first torsion bar 5, and a first lateral protrusion 242 is laterally raised on the opposite side of the first positioning block 24 to be close to one side of the first torsion bar 5, so that the first torsion bar 5 There is a distance between this side and the opposite side of the first positioning block 24 to prevent the flipping action of the first torsion bar 5 and the second tooth member 72 of the gear set 7 from interfering with each other, which facilitates the first torsion bar 5 to turn out or into the first torsion bar 5 A accommodating groove 212; a second accommodating groove 213 is formed between the second positioning block 25 and the second arcuate block 23 for accommodating the second torsion bar 6, and on the opposite side of the second positioning block 25 There is a second lateral protrusion 252 which is protruded laterally to be close to one side of the second torsion bar 6, so that the side of the second torsion bar 6 and the opposite side of the second positioning block 25 are spaced apart to prevent the second torsion bar 6 from turning over The action and the first tooth 71 of the gear set 7 interfere with each other, which facilitates the second torsion bar 6 to rotate out or into the second accommodating groove 213; and at least two concave surfaces of the arc-shaped base 21 are also provided There are two positioning square posts 214. The first positioning block 24 and the second positioning block 25 are respectively provided with a longitudinal hole (243, 253) longitudinally through which at least two positioning square posts 214 are respectively correspondingly inserted and locked, which is helpful for the first The positioning block 24 and the second positioning block 25 are positioned side by side and are respectively locked on the inner concave surface of the arc-shaped base 21. One side end of the first positioning block 24 extends laterally with a first end convex portion 241: the second positioning block 25 One side end extends laterally with a second end convex portion 251: thereby making the first The first end protrusion 241 of a positioning block 24 is connected to the side opposite end of the second positioning block 25, and the second end protrusion 251 of the second positioning block 25 is connected to the side opposite end of the first positioning block 24, so that A hollow groove 211 is formed between the two parallel positioning blocks for accommodating and protecting a first helical gear 711, a second helical gear 721, a first intermediate gear 73, and a second intermediate gear of the gear set 7 74 and other gear parts are engaged and rotated, and it is convenient to store lubricating grease/grease for smooth rotation of each gear part, and the connection relationship between each gear part and these two positioning blocks is described later.

Each of the juxtaposed first positioning block 24 and the second positioning block 25 is provided with a plurality of holes transversely respectively. Among these holes, the first positioning block 24 has two first pivot holes 244 and two first special-shaped long holes. 245 and two first transverse through holes 246. The second positioning block 25 has two second pivot holes 254, two second special-shaped long holes 255 and two second transverse through holes 256; among them, two second transverse through holes 256 Corresponding to the two first transverse through holes 246, respectively, for axially connecting a connecting bolt 26, and a connecting bolt 26 makes the first end convex portion 241 of the first positioning block 24 tightly fit the side opposite ends of the second positioning block 25, The other connecting bolt 26 makes the second end convex portion 251 of the second positioning block 25 tightly fit the side opposite end of the first positioning block 24; on one side of the hollow groove 211, two first special-shaped long holes 245 are arranged. Located between the two first pivot holes 244, two second special-shaped elongated holes 255 are arranged on opposite sides of the hollow slot 211 to be located between the two second pivot holes 254, and the two second pivot holes 254 correspond to the two Two first pivot holes 244 for pivotally connecting opposite ends of the first tooth member 71 and opposite ends of the second tooth member 72. The two second special-shaped long holes 255 correspond to the two first special-shaped long holes 245, respectively. For pivotally connecting the opposite ends of the first intermediate gear 73 and the opposite ends of the second intermediate gear 74, the two positioning blocks have the same modular structure, and each of the special-shaped long holes is connected to the respective longitudinal holes ( 243,253) are connected to facilitate mold-opening manufacturing, and each special-shaped elongated hole has upper and lower pivot points, so that the first and second intermediate gears (73,74) can be selectively pivoted for ease of assembly , Increase the convenience of use.

The first rotating member 3 includes a first connecting portion 31 and a first arc-shaped block 32 extending from one end of the first connecting portion 31. The first connecting portion 31 is connected to the side of the first support plate 91 of the body of the electronic device. The first rotating member 3 is connected with the first connecting portion 31 and the first arc-shaped block 32 transversely through a through hole Hole, the first rotating member 3 is transversely penetrated by a first headed round pin. The opposite ends of the first headed round pin form a first protruding column 311 and a first non-round head 312, respectively. A convex post 311 is formed on one side of the first rotating member 3, and a first embedding groove 313 is recessed on the opposite side of the first rotating member 3 for the corresponding first non-circular head 312 to be fitted and positioned to Prevent the first round pin with a head from rotating by itself; the first arc block 32 is an arc plate, the curvature of which is the same as the curvature of the first arc guide portion 223, and is limited to the first arc in a manner that can swing relative to the arc. Inside an arc-shaped guide portion 223.

The second rotating member 4 includes a second connecting portion 41 and a second arc-shaped block 42 extending from one end of the second connecting portion 41. The second connecting portion 41 is connected to the side of the second support plate 94 of the other body of the electronic device. On the other hand, the second rotating member 4 is connected to the second connecting portion 41 and the second arc-shaped block 42 through a perforation transversely, so that the second rotating member 4 is transversely penetrated by a second headed round pin, and the second headed circle A second convex post 411 and a second non-circular head 412 are formed on opposite ends of the pin, so that the second convex post 411 is formed on one side of the second rotating member 4. The opposite side of the second rotating member 4 is also recessed with a second embedding groove 413 for fitting and positioning the corresponding second non-round head 412 to prevent the second headed round pin 412 from rotating by itself; the second arc-shaped block 42 is It is an arc-shaped plate, and its curvature is the same as that of the second arc-shaped guiding portion 233, and is confined in the second arc-shaped guiding portion 233 in a manner capable of swinging relative to the arc.

The first torsion bar 5 is formed by superimposing a plurality of first torsion plates 51. One end of the first torsion bar 5 is C-shaped, and one end of the first torsion bar 5 clamps the first torsion bar on the side of the first rotating member 3. A protruding column 311 for mutual rotation and friction to form a torsion force. The other end of the first torsion bar 5 forms a long groove. The long groove is used as the first rail 52. The first rail 52 has two parallel lengths. Side plane. The second torsion bar 6 is formed by superimposing a plurality of second torsion plates 61. One end of the second torsion bar 6 is C-shaped, and one end of the second torsion bar 6 clamps the first torsion member 4 on one side. The two protruding posts 411 are for mutually rotating and rubbing to form a torsion force. The other end of the second torsion rod 6 forms a long groove, and the long groove is used as the second track 62, and the second track 62 has two parallel lengths. Side plane.

The gear set 7 includes a first tooth 71, a second tooth 72, and a first intermediate tooth Wheel 73 and a second intermediate gear 74. The first gear 71 has a first helical gear 711 and a first shaft 712 axially penetrating the first helical gear 711. One end of the first shaft 712 has two mutually parallel planes. As the first guiding portion 713, the first guiding portion 713 of the first shaft 712 passes through a first pivot hole 244 of the first positioning block 24 to be inserted into the first rail 52 of the first torsion bar 5 , Allowing the two long side planes of the first rail 52 to respectively contact the two planes of the first shaft 712 to form an engagement to limit the linear movement, so that the first rail 52 and the first torsion bar 5 move relatively. The second gear 72 has a second helical gear 721 and a second shaft 722 axially penetrating the second helical gear 721. The periphery of one end of the second shaft 722 has two parallel planes, and the two planes serve as The second guiding portion 723, the second guiding portion 723 of the second shaft 722 passes through another second pivot hole 254 of the second positioning block 25 to be inserted into the second rail 62 of the second torsion bar 6, The two long side planes of the second track 62 are respectively provided for the two planes of the first shaft 712 to be in contact with each other to form an engagement to limit the linear movement, so that the second track 62 and the second torsion bar 6 move relatively. The first intermediate gear 73 and the second intermediate gear 74 are mutually toothed and located between the first gear 71 and the second gear 72. The first intermediate gear 73 is geared with the first helical gear 711 of the first gear 71. The two intermediate gears 74 are engaged with the second helical gear 721 of the second gear 72, so that the first gear 71 and the second gear 72 can rotate in opposite directions.

Thereby, as shown in Figures 7-9, in the process of turning the first support plate 91 (the first rotating member 3) and the second supporting plate 92 (the first rotating member 4) to close or fully unfold, the first rotating The member 3 and the second rotating member 4 respectively pull the first torsion bar 5 and the second torsion bar 6 through the first headed round pin and the second headed round pin, respectively, so that the first guide portion 713 of the first tooth piece 71 and The second guide portion 723 of the second tooth member 72 moves linearly along the first rail 52 of the first torsion bar 5 and the second rail 62 of the second torsion bar 6 and is rotated synchronously, thus passing through the first torsion bar 5 And the second torsion rod 6 are linked to drive the first gear 71 and the second gear 72, and through the intermediate transmission of the first intermediate gear 73 and the second intermediate gear 74, the first rotating member 3 can be relative to the The two rotating parts 4 rotate in reverse. When the first rotating member 3 and the second rotating member 4 respectively rotate, they are connected to the C-shaped end of the first torsion bar 5 and the second torsion via the first convex post 311 and the second convex post 411, respectively. The C-shaped end of the force rod 6 generates the forward and reverse rotational frictional torques generated by the joint operation, and keeps the torque stably within the preset range at each rotation angle, so that the first support plate 91 and the first support plate 91 and the first support plate 91 and the first support plate 91 and the first support plate 91 The two supporting plates 92 can rotate relatively stably, and can freely stagnate at a certain angle when rotating. What's more, it can be designed to form a C-shaped end structure with the function of opening light and closing weight. When the first supporting plate 91 and the second supporting plate 92 are superimposed on each other, a sufficient accommodating space 94 can be formed between each other for accommodating the curved part of the flexible display 93 with a small curvature.

Therefore, the present invention has the following advantages:

1. The present invention adopts "dual virtual rotation centers", using two rotating parts to rotate synchronously with respect to the arc-shaped seat body to replace the compensation action generated by the "shaftless rocker" structure, and the two rotating parts are folded relative to each other At this time, there is still a accommodating space for accommodating the bending part of the flexible display; therefore, the movement of the hinge module can be effectively simplified, and the overall thickness can be reduced to facilitate the design, so as to achieve the overall light and thin market demand. Promote sales, and can effectively cope with the small curvature limit of the existing flexible display when bending, so as to extend the service life of the flexible display.

2. The torsion bars of the present invention can provide frictional torque synchronously, and can share the load, so that the two rotating parts can rotate relatively stably, and can freely stagnate at a certain angle during rotation, which can further form the opening light and closing weight. The torque changes and stops at a specific angle. In addition to being composed of multiple plates, each torsion bar can also be manufactured in one piece for practical implementation and increase flexibility in use.

3. The present invention can adopt modular structure design for the arc block, positioning block, rotating part, torsion bar and other elements to facilitate assembly and manufacturing.

Although the present invention discloses preferred specific embodiments for achieving the above-mentioned objectives, they are not intended to limit the structural features of the present invention. Any person skilled in the art should know that under the technical spirit of the present invention, any light-hearted thinking And the changes or modifications are all possible, and they are all specific to the application of the present invention. Covered by the scope of interest.

1: Hidden split hinge

2: Curved seat body

21: Curved base

22: The first camber block

221: The First Body

222: The first limit part

223: The first arc guide

23: The second camber block

231: The Second Body

232: The second limit part

233: second arc guide

24: The first positioning block

241: first pivot hole

25: The second positioning block

3: The first rotating part

31: The first connection part

311: The first boss

32: The first arc block

4: The second rotating part

41: The second connecting part

411: second boss

42: second arc block

5: The first torsion bar

51: The first torsion piece

6: The second torsion bar

61: The second torsion piece

62: second track

7: Gear set

71: The first tooth

711: First Helical Gear

72: second tooth

721: second helical gear

73: The first intermediate gear

74: second intermediate gear

Claims (14)

A concealed split hinge includes: an arc-shaped seat body with two side surfaces facing oppositely, and a first arc-shaped guide part and a second arc-shaped spaced and parallel to each other are arranged between the two side surfaces Guide portion; a first rotating member, which includes a first connecting portion and a first arc block, the first connecting portion is connected to a first support plate, the first arc block can swing relative to the arc The method is limited to the first arc-shaped guiding part; a second rotating part includes a second connecting part and a second arc-shaped block, the second connecting part is connected to a second supporting plate, and the second arc-shaped The block is confined in the second arc-shaped guide part in a relatively arc-shaped swing; a first torsion rod, one end of which clamps one side of the first rotating member for mutual friction to form a torsion force, the first torsion force The other end of the rod is provided with a first track; a second torsion rod, one end of which clamps one side of the second rotating member for mutual friction to form a torsion force, and the other end of the second torsion rod is provided with a second track; And a gear set having a first tooth member and a second tooth member that rotate in opposite directions, the first tooth member has a first shaft, and the first shaft has a first guide portion for Limit the first track and move relative to the first torsion bar; the second tooth member has a second shaft, and the second shaft has a second guiding part for limiting the second rail and The second torsion bar moves relatively. For the concealed split hinge described in item 1 of the scope of patent application, the arc-shaped seat body includes an arc-shaped base, a first arc-shaped block and a second arc-shaped block, the first arc-shaped block and the first arc-shaped block The two arcuate blocks are spaced apart and parallel to each other and are connected to the arc-shaped base respectively. The first arcuate block has a first body and at least one first limiting portion. The first arc-shaped guiding portion is formed in between, for limiting the first arc-shaped block in a relatively arc-shaped swing; the second arc-shaped block has a second body and at least one second limiting portion, the The second body and the at least one second limiting portion form the second The arc-shaped guide portion is provided for limiting the second arc-shaped block in a manner capable of swinging relative to the arc. The concealed split hinge described in item 2 of the scope of patent application, wherein the arc-shaped seat body further includes a first positioning block and a second positioning block, and the first positioning block and the second positioning block are arranged side by side and connected respectively The arc-shaped base, the first positioning block and the second positioning block are pivotally connected to position the first tooth member and the second tooth member, and the first guide portion of the first shaft of the first tooth member penetrates Pass the first positioning block to connect the first rail of the first torsion bar, and the second guide portion of the second shaft of the second tooth member passes through the second positioning block to connect to the second torsion bar . The concealed split hinge described in item 3 of the scope of patent application, wherein one side end of the first positioning block extends transversely with a first end convex part; one side end of the second positioning block extends transversely with a second End convex portion; whereby the first end convex portion of the first positioning block is connected to the side opposite end of the second positioning block, and the second end convex portion of the second positioning block is connected to the first positioning block On the opposite end of the side, a hollow slot is formed between the two positioning blocks in parallel, for the gear parts of the gear set to be accommodated and rotated. For the concealed split hinge described in item 4 of the scope of patent application, the first positioning block and the second positioning block are arranged with a plurality of holes transversely respectively, and the first positioning block is in one of the hollow grooves. Two first pivot holes are arranged on the side surface, and the second positioning block is arranged with two second pivot holes on opposite sides of the hollow slot. The two second pivot holes correspond to the two first pivot holes respectively. The opposite ends of the first tooth member and the opposite ends of the second tooth member are pivotally connected. For the concealed split hinge described in item 3 of the scope of patent application, the first positioning block and the second positioning block are located between the first arcuate block and the second arcuate block, and the first positioning block and A first accommodating groove is formed between the first cambered blocks for accommodating the first torsion bar, and a first lateral protrusion is laterally raised on the opposite side of the first positioning block, so that the first torsion bar is One side is spaced from the opposite side of the first positioning block; a second accommodating groove is formed between the second positioning block and the second curved block for accommodating the second torsion bar and is positioned at the second positioning block The opposite side of the block bulges laterally with a second side convex part, so that the One side of the second torsion bar is spaced from the opposite side of the second positioning block. As described in item 3 of the scope of patent application, the arc-shaped base has an inner concave surface and at least two positioning square pillars are further provided on the first positioning block and the second positioning block. A longitudinal perforation is longitudinally pierced, respectively, for the at least two positioning square posts to be correspondingly inserted and locked respectively. The concealed split hinge described in the first item of the scope of patent application, wherein the first rail at the other end of the first torsion bar is an elongated groove formed on the first torsion bar; The first guiding portion is at least one plane formed on the periphery of one end of the first shaft. According to the concealed split hinge described in item 8 of the scope of patent application, the first torsion bar is formed by superimposing a plurality of first torsion plates. The concealed split hinge described in item 1 of the scope of patent application, wherein the second rail at the other end of the second torsion bar is an elongated groove formed on the second torsion bar; The second guiding part is at least one plane formed on the periphery of one end of the second shaft. According to the concealed split hinge described in item 10 of the scope of patent application, the second torsion bar is formed by superimposing a plurality of second torsion plates. According to the concealed split hinge described in item 1 of the scope of the patent application, the gear set further includes a first intermediate gear and a second intermediate gear interlocking with each other, and the first intermediate gear is interlocking with the first tooth member, The second intermediate gear is engaged with the second tooth member, so that the first tooth member and the second tooth member rotate in opposite directions; wherein the arc-shaped seat body further includes a first positioning block and a first positioning block arranged side by side. Two positioning blocks, a hollow slot is formed between the two positioning blocks, the first positioning block is arranged with two first special-shaped long holes on one side of the hollow slot so as to be located between the two first pivot holes. The two positioning blocks are arranged with two second special-shaped long holes on opposite sides of the hollow slot to be located between the two second pivot holes. The two second pivot holes correspond to the two first pivot holes respectively for the second pivot hole. A first guide part of a tooth passes through the first positioning block A first pivot hole is connected to the first rail of the first torsion bar, and a second guide portion of the second tooth member passes through another second pivot hole of the second positioning block to connect the For the second track of the second torsion bar, the two second special-shaped long holes correspond to the two first special-shaped long holes respectively for pivotally connecting the opposite ends of the first intermediate gear and the opposite ends of the second intermediate gear. According to the concealed split hinge described in item 1 of the scope of the patent application, the first rotating member is transversely penetrated by a first headed round pin, thereby forming a first protruding column on one side of the first rotating member, The first protruding column is clamped by the end of the first torsion bar for mutual rotation and friction to form a torsion force. The first headed round pin has a first non-round head for fitting and positioning on the first torsion bar. The opposite side of a rotating piece; the second rotating piece is transversely penetrated by a second headed round pin, so as to form a second convex post on one side of the second rotating piece, and the second convex post is secured by the first The ends of the two torsion bars are clamped for mutual rotation and friction to form a torsion force. The second headed round pin has a second non-round head for fitting and positioning on the opposite side of the second rotating member. As for the concealed split hinge described in item 13 of the scope of the patent application, the opposite side of the first rotating member is also recessed with a first inserting groove for fitting and positioning corresponding to the first non-circular head; the second The opposite side of the rotating part is also recessed with a second embedding groove for fitting and positioning corresponding to the second non-circular head.

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