CN112901649B - A three-section inner folding hinge - Google Patents

本发明涉及一种三段式内折叠铰链，包括左弹簧支架、右弹簧支架、同步机构、锁定机构及屏幕支撑避让机构，同步机构包括挡板、扭力片、齿轮组及限位板，屏幕支撑避让机构包括第一旋转块、第二旋转块、滑块、升降块、左盖板及右盖板；左弹簧支架的一端连接于齿轮组及第一旋转块，右弹簧支架的一端连接于齿轮组及第二旋转块；第一旋转块及第二旋转块部分抵接于升降块以实现升降块的升降动作，升降块的两端设有延伸柱，左盖板及右盖板的端部设有倾斜槽，延伸柱分别对应安装于倾斜槽内。上述的一种三段式内折叠铰链空间占比率小，动作机构简单高效，可满足任意三段式折叠移动终端外观，有效提高了实用性及使用场景。

The present invention relates to a three-stage inner folding hinge, including a left spring bracket, a right spring bracket, a synchronization mechanism, a locking mechanism and a screen support avoidance mechanism, the synchronization mechanism includes a baffle, a torsion plate, a gear set and a limit plate, the screen support avoidance mechanism includes a first rotating block, a second rotating block, a slider, a lifting block, a left cover plate and a right cover plate; one end of the left spring bracket is connected to the gear set and the first rotating block, and one end of the right spring bracket is connected to the gear set and the second rotating block; the first rotating block and the second rotating block are partially abutted against the lifting block to realize the lifting action of the lifting block, and extension columns are provided at both ends of the lifting block, and inclined grooves are provided at the ends of the left cover plate and the right cover plate, and the extension columns are respectively installed in the inclined grooves. The above-mentioned three-stage inner folding hinge has a small space occupancy rate, a simple and efficient action mechanism, can meet the appearance of any three-stage folding mobile terminal, and effectively improves practicality and usage scenarios.

Three-section type inner folding hinge

Technical Field

The invention relates to the technical field of hinges, in particular to a three-section type inner folding hinge.

Background

A flexible screen is a flexible screen, referred to as a flexible OLED. The successful mass production of the flexible screen is not only limited to the manufacture of new generation high-end smart phones, but also has profound effects on the application of wearable equipment due to the low power consumption and the bendable property of the flexible screen, wherein the folding hinge is used as a common accessory of the flexible screen folding equipment.

However, the existing three-section type inner folding hinge structure has the problems of more and complex hinge action mechanisms, unstable structural connection, large space occupation ratio of the mobile terminal and incapability of matching any appearance of the mobile terminal. Therefore, research on the inner folding hinge with small space occupation ratio and simple and efficient action mechanism can meet the appearance of any three-section folding mobile terminal is significant.

Disclosure of Invention

Based on the above, it is necessary to provide a three-section inner folding hinge aiming at the problem that the existing three-section inner folding hinge structure has more and complex hinge action mechanisms, thereby greatly simplifying the structural complexity of the hinge, saving the space and being capable of matching with any external appearance of the three-section inner folding mobile terminal.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

The three-section type inner folding hinge comprises a left spring support, a right spring support, a synchronizing mechanism, a locking mechanism and a screen support avoiding mechanism, wherein the synchronizing mechanism comprises a baffle, a torsion plate, a gear set and a limiting plate, the screen support avoiding mechanism comprises a first rotating block, a second rotating block, a sliding block, a lifting block, a left cover plate and a right cover plate, the locking mechanism is used for generating locking force to realize locking action of opening or closing a screen, one end of the left spring support is connected with the gear set and the first rotating block, one end of the right spring support is connected with the gear set and the second rotating block, the left spring support and the right spring support are symmetrically arranged to realize synchronous linkage, the first rotating block and the second rotating block are partially abutted to the lifting block to realize lifting action of the lifting block, extension columns are arranged at two ends of the lifting block, inclined grooves are arranged at the ends of the left cover plate and the right cover plate, and the extension columns are respectively correspondingly arranged in the inclined grooves to realize screen support and avoidance action of the left cover plate and the right cover plate.

The three-section type inner folding hinge has small space occupation ratio, the action mechanism is simple and efficient, the appearance of any three-section type folding mobile terminal can be met, meanwhile, the three-section type inner folding hinge has screen supporting action when being unfolded, and the screen is bent in space when being closed, so that the practicability is effectively improved.

In one embodiment, the gear set includes a left gear, an intermediate gear assembly, and a right gear that are sequentially meshed, the intermediate gear assembly including a first intermediate gear and a second intermediate gear, the first intermediate gear meshed with the second intermediate gear.

In one embodiment, the left spring support and the right spring support are respectively provided with a protruding block, two ends of the baffle are respectively provided with an angle limiting groove, the protruding blocks are matched with the angle limiting grooves, the left spring support and the right spring support are provided with cylindrical bosses, and the cylindrical bosses are in interference fit with the torsion plate.

In one embodiment, the middle section of the limiting plate is provided with a supporting column, the middle section of the lifting block is provided with a sliding groove, the sliding block is installed in the sliding groove, the supporting column is connected with the sliding block, the cylindrical boss of the left spring support is connected with the left gear and the first rotating block, the cylindrical boss of the right spring support is connected with the right gear and the second rotating block, the first rotating block and the second rotating block are respectively provided with rotating bosses, the two sides of the lifting block are provided with arc grooves, and the rotating bosses of the first rotating block and the second rotating block are respectively installed in the arc grooves on the two sides of the lifting block so as to realize lifting action of the lifting block.

In one embodiment, the screen support avoidance mechanism further comprises a first auxiliary module and a second auxiliary module, the first auxiliary module is connected to the left cover plate, the second auxiliary module is connected to the right cover plate, the first auxiliary module comprises a fixing seat, a connecting rod and an elastic piece, the fixing seat is mounted on the left spring support, the connecting rod and the elastic piece are mounted in the fixing seat, and the end portion of the connecting rod is connected to the clamping portion of the left cover plate.

In one embodiment, the device further comprises a left shell, a right shell and a middle shell, wherein the left shell and the right shell are respectively positioned on two sides of the middle shell, the left cover plate is movably connected to two ends of the left shell, the right cover plate is movably connected to two ends of the right shell, the other end of the left spring support is connected to the left shell, and the other end of the right spring support is connected to the right shell.

In one embodiment, the locking mechanism comprises a first locking module and a second locking module, the first locking module is mounted on the left spring support, the second locking module is mounted on the right spring support, the first locking module comprises a first supporting rod and a first elastic piece, a plurality of abutting grooves are formed in the outer wall of the middle shell, and the first supporting rod is connected to the outer wall of the middle shell in a sliding mode to achieve locking action of opening or closing of a screen.

Drawings

FIG. 1 is a schematic view showing an unfolded state of a three-stage inner folding hinge according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of a closed state of the three-stage inner folding hinge of FIG. 1;

FIG. 3 is an exploded view of a three-section inner folding hinge of FIG. 1;

FIG. 4 is a schematic view of the first integrated module of FIG. 1 in an unfolded state;

FIG. 5 is a schematic diagram illustrating a bending state of the first integrated module of FIG. 4;

FIG. 6 is a schematic diagram illustrating a closed state of the first integrated module of FIG. 4;

FIG. 7 is an exploded view of the first integrated module of FIG. 4;

FIG. 8 is a cross-sectional view of the screen support avoidance mechanism of FIG. 1 in an expanded state;

FIG. 9 is a cross-sectional view of the screen support avoidance mechanism of FIG. 8 in a bent state;

FIG. 10 is a closed state cross-sectional view of the screen support avoidance mechanism of FIG. 8;

FIG. 11 is a cross-sectional view of the locking mechanism of FIG. 1 in an expanded state;

FIG. 12 is a cross-sectional view of the locking mechanism of FIG. 11 in a bent state;

FIG. 13 is a closed state cross-sectional view of the locking mechanism of FIG. 11;

fig. 14 is an exploded view of the locking mechanism of fig. 11.

Reference numerals illustrate:

100. A three-section inner folding hinge;

11. Left casing, 12, right casing, 13, middle casing, 20, first integrated module, 21, left spring bracket, 22, right spring bracket, 23, synchronization mechanism, 231, baffle, 231a, angle limiting groove, 232, torque plate, 234, gear set, 234a, left gear, 234b, right gear, 234c, first intermediate gear, 234d, second intermediate gear, 235, limiting plate, 24, locking mechanism, 241, first support bar, 242, first elastic member, 25, screen support avoidance mechanism, 251, first rotating block, 252, second rotating block, 253, slider, 254, lifting block, 254a, sliding groove, 254b, circular arc groove, 254c, extension column, 255, left cover plate, 256, right cover plate, 26, cylindrical boss, 257, rotating boss, 258, inclined groove, 27, first auxiliary module, 271, fixing base, 272, connecting rod, 273, elastic member, 28, second auxiliary module, 30, second integrated module.

Detailed Description

The present invention will be described more fully hereinafter in order to facilitate an understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 14, a three-stage inner folding hinge 100 according to a preferred embodiment of the present invention includes a left housing 11, a right housing 12, a middle housing 13, a first integrated module 20 and a second integrated module 30, wherein the first integrated module 20 and the second integrated module 30 are respectively located at two ends of the middle housing 13, the second integrated module 20 has the same structure as the first integrated module 10, and the combination of the two integrated modules is used to realize the modular operation and the symmetrical joint design of the hinge. The first comprehensive module 20 comprises a left spring support 21, a right spring support 22, a synchronizing mechanism 23, a locking mechanism 24 and a screen support avoiding mechanism 25, wherein the synchronizing mechanism 23 is fixedly connected to the end part of the middle shell 13, the synchronizing mechanism 23 comprises a baffle 231, a torsion plate 232, a gear set 234 and a limiting plate 235, the torsion plate 232 and the gear set 234 are positioned between the baffle 231 and the limiting plate 235, one ends of the left spring support 21 and the right spring support 22 are respectively connected to the left shell 11 and the right shell 12, the other ends of the left spring support 21 and the right spring support 22 are respectively movably connected to the synchronizing mechanism 23 and the screen support avoiding mechanism 25, and the moving closure design is formed by the left spring support, the right spring support, the synchronizing mechanism, the locking mechanism, the screen support avoiding mechanisms and the shells, so that a hinge symmetrical joint structure is realized, synchronous rotation actions can be realized at two ends of the hinge, and the first comprehensive module is applicable to mobile terminals of an outer flexible screen, such as mobile phones and notebook computers.

Further, the left housing 11 and the right housing 12 are respectively located at two sides of the middle housing 13, the gear set 234 includes a left gear 234a, an intermediate gear assembly and a right gear 234b which are sequentially meshed, the intermediate gear assembly includes a first intermediate gear 234c and a second intermediate gear 234d, the first intermediate gear 234c is meshed with the second intermediate gear 234d to provide force transmission, so as to realize synchronous linkage of the left gear 234a and the right gear 234b, and meanwhile, the left gear 234a and the right gear 234b are respectively installed on boss flat positions of the left spring bracket 21 and the right spring bracket 22, so that the left spring bracket 21 and the right spring bracket 22 can correspondingly drive the left gear 234a and the right gear 234b to rotate. It should be noted that in the present embodiment, the number of the intermediate gear assemblies is two, that is, the number of the first intermediate gears 234c and the second intermediate gears 234d is one, and it can be understood that in other embodiments, the number and the size of the gears of the intermediate gear assemblies can be adjusted according to the actual use scenario and the production requirement, so that the left gear and the right gear can be ensured to realize stable synchronous linkage, and therefore, the number of the intermediate gear assemblies is not excessively limited.

Further, the left spring support 21 and the right spring support 22 are respectively provided with a protruding block, both ends of the baffle 231 are respectively provided with an angle limiting groove 231a, the protruding blocks are matched with the angle limiting grooves 231a, and the maximum rotation angle of the rotating shaft is limited through limiting actions of the protruding blocks and the angle limiting grooves 231 a. Meanwhile, the cylindrical bosses 26 of the left spring support 21 and the right spring support 22 are in interference fit with the torsion plate 232, so that friction force is generated when the left spring support 21 and the right spring support 22 rotate, and torsion is generated by the rotating shaft.

The synchronous mechanism works on the principle that in the process of closing to unfolding the rotating shaft, the left shell 11 rotates clockwise to drive the left spring support 21 to rotate clockwise, so that the left gear 234a is driven to rotate clockwise, and then the right gear 234b is driven to rotate anticlockwise through the transmission of the intermediate gear assembly to drive the right spring support 22 to move anticlockwise, so that the right shell 12 is driven to move anticlockwise, and synchronous closing movement of the rotating shaft is realized. Similarly, when the rotating shaft is unfolded to be closed, the left shell 11 rotates anticlockwise, the left spring support 21 is driven to rotate anticlockwise, the left gear 234a is driven to rotate anticlockwise, the right gear 234b is driven to rotate clockwise through the transmission of the intermediate gear assembly, the right spring support 22 is driven to move clockwise, the right shell 12 is driven to move clockwise, and therefore synchronous unfolding movement of the rotating shaft is achieved, and synchronous movement of the rotating shaft is finally achieved.

Further, the screen support avoidance mechanism 25 includes a first rotating block 251, a second rotating block 252, a sliding block 253, a lifting block 254, a left cover plate 255 and a right cover plate 256, wherein a support column is arranged at the middle section of the limiting plate 235, a sliding groove 254a is arranged at the middle section of the lifting block 254, the sliding block 253 is installed in the sliding groove 254a, the support column is connected with the sliding block 253, a cylindrical boss 26 of a left spring bracket is connected with the first rotating block 251, a cylindrical boss of a right spring bracket is connected with the second rotating block 252, the first rotating block 251 and the second rotating block 252 are respectively provided with a rotating boss 257, circular arc grooves 254b are arranged at two sides of the lifting block 254, and the rotating bosses of the first rotating block 251 and the second rotating block 252 are respectively installed in the circular arc grooves 254b at two sides of the lifting block 254 to realize lifting actions of the lifting block.

Further, the left cover plate 255 is movably connected to two ends of the left housing 11, the right cover plate 256 is movably connected to two ends of the right housing 12, extension columns 254c are arranged at two ends of the lifting block 254, inclined grooves 258 are arranged at ends of the left cover plate 255 and the right cover plate 256, and the extension columns 254c are respectively correspondingly arranged in the inclined grooves 258 to realize screen supporting and space avoiding actions of the left cover plate and the right cover plate.

Further, the screen support avoiding mechanism 25 further includes a first auxiliary module 27 and a second auxiliary module 28, the first auxiliary module 27 is connected to the left cover plate 255, the second auxiliary module 28 is connected to the right cover plate 256, the first auxiliary module 27 includes a fixing seat 271, a connecting rod 272 and an elastic member 273, the fixing seat 271 is mounted on the left spring bracket 21, the connecting rod 272 and the elastic member 273 are mounted in the fixing seat 271, and an end portion of the connecting rod 272 is connected to a clamping portion of the left cover plate 255.

The screen support avoiding mechanism 25 has the working principle that when the rotating shaft is unfolded to be closed, the left shell 11 rotates clockwise to drive the left spring support 21 to rotate clockwise, so that the first rotating block 251 is driven to rotate clockwise, meanwhile, the right shell 12 moves anticlockwise to drive the right spring support 22 to rotate anticlockwise to drive the second rotating block 252 to move anticlockwise, the first rotating block 251 rotates clockwise and the second rotating block 252 rotate anticlockwise to enable the respective rotating lug boss 257 to rotate downwards, so that the lifting block 254 is pressed downwards, the lifting block 254 drives the left cover plate 255 and the right cover plate 256 to move downwards, and meanwhile, the left cover plate 255 and the right cover plate 256 rotate to two sides around the rotating centers movably connected with the left shell 11 and the right shell 12 respectively, so that space is reserved for bending a screen. Similarly, when the rotating shaft is closed to open, the lifting block 254 will generate opposite movement to move the left cover plate 255 and the right cover plate 256 upwards, so as to support the screen. Simultaneously, in the process of unfolding and closing, the first auxiliary module and the second auxiliary module can continuously pull the left cover plate 255 and the right cover plate 266, so as to provide partial force for the rotation avoidance of the respective cover plates, and simultaneously provide partial supporting force for the support of the corresponding cover plates to the screen.

Further, the locking mechanism 24 comprises a first locking module and a second locking module, the second locking module has the same structure as the first locking module and is used for providing a locking hand feeling for the rotating shaft, the first locking module is mounted on the left spring support, the second locking module is mounted on the right spring support, the first locking module comprises a first supporting rod 241 and a first elastic piece 242, a plurality of abutting grooves are formed in the outer wall of the middle shell 13, and the first supporting rod 241 is slidably connected to the outer wall of the middle shell 13 to realize a locking action of opening or closing the screen.

The locking mechanism 24 has the working principle that the supporting rods of the first locking module and the second locking module slide upwards from the positions of the left abutting groove and the right abutting groove of the middle shell 13 respectively in the process of unfolding the rotating shaft to be closed, the first supporting rod 241 continuously compresses the first elastic piece 242 in the process, the first elastic piece 242 provides locking force to enable the rotating shaft to generate locking handfeel, after the end parts of the first supporting rod 241 slide out of the abutting grooves at the left end and the right end completely, the left abutting groove and the right abutting groove continue to slide along the middle shell, at the moment, the left abutting groove and the right abutting groove do not continuously compress the first elastic piece 242, spring force is unchanged, the rotating shaft rotates stably, when the first supporting rod 241 rotates to the top of the abutting groove above the middle shell, the supporting rod slides towards the bottom of the abutting groove under the action of the spring force, the spring force is gradually reduced, at the moment, the rotating shaft is automatically closed, the locking handfeel during closing the rotating shaft is generated, and the same movement principle that the rotating shaft is opened, the rotating shaft slides from the abutting groove at the upper end of the middle shell 13 to the abutting groove at the two ends of the middle shell 13 in the process of unfolding the rotating shaft.

It should be noted that, in the present embodiment, the elastic member of the first auxiliary module and the first elastic member of the first locking module are springs for realizing and generating corresponding spring force, and it can be understood that in other embodiments, the elastic member and the first elastic member may be other elastic members with good elasticity, such as elastic sheets, etc., so that the types of the elastic member and the first elastic member may be adjusted according to actual production conditions, and are not excessively limited in the present application.

The synchronous mechanism and the screen support avoiding mechanism are mounted in such a way that one ends of a left spring support 21 and a right spring support 22 are respectively fixed on a left shell 11 and a right shell 12, the other ends of the left spring support 21 and the right spring support 22 are respectively connected with a baffle 231, a torsion plate 232, a gear, a limiting plate 235, a first rotating block and a second rotating block in series through a cylindrical boss 26 to form a whole, an intermediate gear assembly is meshed with a left gear 234a and a right gear 234b respectively and is mounted on corresponding holes of the torsion plate 232 and the limiting plate 235, a lifting block 254 is mounted on a supporting column of the limiting plate so that a sliding block is mounted on a sliding groove, and rotating bosses of the first rotating block 251 and the second rotating block 252 respectively penetrate through arc grooves on two sides of the lifting block 254 so that the sliding block can slide in the arc grooves.

The three-section type inner folding hinge has small space occupation ratio, and the action mechanism is simple and efficient, so that the appearance of any three-section type folding mobile terminal can be met.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.