Variable-pitch gear synchronous hinge and folding-screen mobile phone thereof

Abstract

Variable wheel gear synchronous hinge and folding screen mobile phone thereof, belong to mechanical technology. Its structure includes structure strip, rotating shaft and radial slider; its features are that: one structure strip body includes at least two structure strip parts; radial sliding groove, gear and push groove are processed along the structure strip; two parts are also processed with interconnection shaft hole for hand-in-hand interconnection; the structure of radial slider includes radial sliding column, gear rack and push card for cooperation with structure strip part; assembly relationship is that: radial slider is connected with radial sliding groove on one structure strip part through radial sliding column for sliding cooperation, and the push card of radial slider is connected in the push groove of another structure strip part; all structure strip bodies are connected with rotating shaft in hand-in-hand interconnection mode; thus, the hinge composed of structure strip, rotating shaft and radial slider is formed; and the installation position of the hinge is below OLED composite layer, forming various forms of folding screen mobile phone.

Description

[TECHNICAL FIELD]

[0001] The present application belongs to the field of structural design; specifically, it is to realize the purpose of screen increase by using the linkage control of radial synchronous displacement components driven by teeth or card driving. [BACKGROUND]

[0002] With the continuous development of the communication industry, smart phones have open operating systems, hardware and software scalability, and support for third-party secondary development.

[0003] The overall structure of the smart phone: the smart phone can be regarded as a pocket computer. It has a processor, memory, input and output devices (keyboard, display screen, USB interface, earphone interface, camera, etc.), and I / O channels. The mobile phone communicates with the base station through air interface protocols (such as GSM, CDMA, PHS, etc.), and can transmit voice and data.

[0004] The main circuit board of the smart phone is the most important component in the mobile phone: it is located in the internal structure of the smart phone and is connected with various components through data soft wires or contacts. The main circuit board can be said to be the core component of the mobile phone, which is responsible for the input, output, processing of mobile phone signals, transmission of mobile phone signals, and power supply, control of the whole machine. The design of the circuit board of different brands of smart phones will be different. Some smart phones have only one circuit board, and some smart phones have a main circuit board and a secondary circuit board in addition to the main circuit. The secondary circuit board is generally connected to the interface, camera and other accessories. The main circuit board of the smart phone is installed with all the SMD components, which are arranged very closely, and the main chips on the circuit board are all welded on the circuit board in the form of BGA. Smart phone circuit structure: the circuit of the smart phone is the core of the smart phone, responsible for the power supply, control of the mobile phone and the realization of various functions of the mobile phone. The circuit of the smart phone mainly includes: radio frequency circuit, voice circuit, processor and memory circuit, power supply and charging circuit, operation and display circuit, interface circuit, and other function circuits (such as Bluetooth, antenna, radio, sensor, vibrator, camera circuit, etc.), as shown in Figure 4

[0005] The specific design process includes: determination of the main board scheme, determination of the mobile phone shape, structure modeling, production of appearance hand plate and appearance adjustment, structure design, structure design optimization, structure review, verification of large structure hand plate, etc. In addition, it also needs to go through: mold review, project follow-up during mold injection, trial production, trial production, mass production process. In the field of mobile phone structure, folding screen technology is undoubtedly the development trend:

[0006] ​Foldable screen is the best solution to promote the "fusion" of mobile phones and tablets: Samsung, the pioneer, has been working on this for years and demonstrated its "Infinity Flex Display" foldable screen solution at the Samsung Developer Conference. The launch of Samsung's first foldable phone, Galaxy Fold, not only solves the contradiction between screen size and portability, but also brings a better visual experience, so the industry generally believes that foldable screens will lead another round of mobile phone revolution after the full-screen. Global top investment bank Goldman Sachs believes that the Samsung Galaxy Fold is a "major potential challenge" for Apple. From the launch, the Galaxy Fold has features that are different from traditional mobile phones, such as the ultra-edge foldable screen, up to six cameras, and the configuration of a dual-battery system. In short, the Galaxy Fold not only provides a satisfactory visual experience, but also surpasses the level of traditional flagship phones in terms of photography, performance, and battery life. Therefore, the Galaxy Fold not only brings a revolution in mobile phone screens, but also pushes the mobile phone industry to a higher level. In the demonstration, the effect is still very amazing, you can see a tablet-sized screen fold inward into a small screen, while the outside display is no different from the mobile phone we use every day, with a strong sense of technology, completely out of the current mobile phone manufacturers' exploration of the full-screen, which is even revolutionary. Unlike previous hinge designs, Samsung's "Infinity Flex Display" foldable screen is a whole screen that folds. According to the foldable screen patent application, the foldable screen has two electrode layers that can be powered separately, and the bottom substrate is made of flexible plastic material, which can facilitate screen bending and folding. From the structural design, the Galaxy Fold adopts an internal folding design, with two states of opening and closing. When in the closed state, the user is presented with a cover display screen with a size of 4.6 inches, a resolution of 1960x840 pixels, a screen density of 420ppi, and a width-to-height ratio of 21:9, which is similar in size to an ordinary mobile phone. When the Galaxy Fold is opened, the user is presented with a main display screen with a size of 7.3 inches, a resolution of 2152x1536 pixels, a width-to-height ratio of 4.2:3, and a screen density of 420ppi. In simple terms, in the closed state, the Galaxy Fold is an ordinary smartphone, while in the unfolded state, the Galaxy Fold becomes a tablet computer. Looking at the structure alone is easy to understand, the problem is how to ensure that the screen performance does not decrease during the opening and closing process, and that the user has a smooth and smooth experience. This brings us to Samsung's new ultra-edge foldable screen, which can bend 360 degrees to meet any folding needs. Based on this screen technology, the screen performance remains optimal during repeated opening and closing by the user, so that the user will not have any feeling of visual discontinuity.Whether the Galaxy Fold is open or folded, the displayed applications seamlessly switch, allowing users to easily switch between the home and cover screens. Samsung states that if developers allow them to scale their apps, all regular Android applications will run perfectly on the Galaxy Fold; for example, the system will adjust applications to tablet mode when the phone switches from portrait to landscape mode. Furthermore, the Galaxy Fold offers a more efficient user experience in open mode, adapting to more complex scenarios. Its powerful multi-window feature allows for simultaneous three tasks.

[0007] The hinge designs at the folding points of Huawei and Apple are extremely complex. Huawei uses a five-segment distribution turning design, employing more than 100 parts and undergoing three years of dedicated research and development. Apple's similar design uses more than 200 parts. The technical difficulty lies in the need for a smooth unfolding of the bend with a constant radius in real time, which not only requires a certain amount of support strength but also a lifespan of more than 100,000 cycles.

[0008] Samsung has also developed a three-layer foldable screen phone, similar to a "scroll" experience. Patent documents show that it requires bending and stretching from two directions, making it far more difficult than a two-layer foldable screen. [Summary of the Invention]

[0009] Existing product defects: The current mobile phone bending mechanism design representatives are: Samsung, Apple, Lenovo, etc.; their common design shortcomings are: in order to adapt to the need for a non-stretchable screen after bending, they either have to move the two ends of the hinge to adapt when the length of the hinge after bending cannot be changed; or they have to use an extremely complex linkage mechanism to change the spacing between the links.

[0010] The purpose of this invention is to address the shortcomings of current products by designing a flexible OLED hinge suitable for external folding, using a single gear and rack structure; it has the advantages of simple structure, space saving, beautiful appearance and reliable operation.

[0011] The features of this invention include: simple concept, limited increase in cost, significant reduction in size, and reliable operation.

[0012] Specific embodiments of the present invention:

[0013] The structure of the variable-axle-distance gear synchronous hinge comprises a structure strip 1, a structure strip 2, a rotating shaft 1, a rotating shaft 2, a radial slider, a synchronous gear, and a rack. The connection between the structure strip 1 and the structure strip 2 is achieved by the structure of the rotating shaft or the shaft hole along the direction of the structure strip, that is, the structure strip 1 is processed with a radial sliding groove or a sliding column matched with the radial slider, a synchronous gear or a rack, or a card slot or a slot. The structure strip 2 is processed with a sliding groove or a sliding column matched with the radial slider. The structure of the radial slider comprises a radial sliding column or a sliding groove matched with the structure strip 1, a rack, a gear, or a slot or a card slot, and a sliding column or a sliding groove matched with the structure strip 2. The assembly and working principle of the variable-axle-distance gear synchronous hinge are as follows: first, the hinge connection between all structure strips 1 and structure strips 2 at the rotating shaft 2 is achieved, which is called a combination, and then the rotating shaft 1 of the combined structure strip 2 is connected in a hand-in-hand manner to form a chain. The radial slider and the structure strip 1 are connected through the matching relationship between the sliding groove or the sliding column, which satisfies the displacement between the radial slider and the structure strip 1 under the mutual linear constraint. The specific implementation method is as follows: the mutual driving of the rack or the gear or the slot or the card slot processed on the structure strip 1 and the radial slider (the driving structure is respectively processed on the two objects in relative motion, and the corresponding relationship is that the gear matches the rack and the card slot corresponds to the slot), so that the radial slider and the structure strip produce mutual displacement along the direction of the sliding groove. At the same time, the card slot hole part and the card column part between the radial sliders are nested and inserted, and when the entire hinge is bent, the radial sliders are linked and constrained on the same column surface, so that the curvature of the entire hinge is the same. At the same time, the synchronous radial movement of the radial sliders also changes the angle between the structure strip 1 and the structure strip 2 under the constraint of the rotating shaft 2 through the cooperation between the sliding groove or the sliding column. When the hinge is bent, the angle decreases, and vice versa. In this way, when the hinge is bent, the radial slider moves outward, on the one hand, the rotating shaft 1 increases the angle between the structure strip 1 and the structure strip 2 in the combination, and on the other hand, the outward displacement of the radial slider reduces the angle between the structure strip 1 and the structure strip 2 in each combination, which presents a mutual offset effect, so that the length of the peripheral contour line of the bent hinge in any state remains unchanged (which makes the screen component layer on the periphery of the hinge nearly unaffected by deformation). In order to make the hinge straight and rigid when the screen of the mobile phone is unfolded, the problem of clamping needs to be solved when the hinge is stretched, which requires that the hinge has a blocking structure in the stretched state. The structure strip is processed with a structure strip split body connection hole or a connection shaft along the direction of the structure strip, and the two split bodies are also processed with a connection hole or a connection shaft for hand-in-hand interconnection. All structure strip combinations are connected by the hinge connection of the connection hole or the connection shaft in a hand-in-hand interconnection manner. The radial slider and one of the structure strip split bodies are connected through the sliding groove or the sliding column.

[0014] The folding screen mobile phone body structure with variable axle distance gear synchronous hinge comprises a mainboard, a camera, a battery, a loudspeaker, a microphone, a wired or wireless interface device, a screen and a shell. The inside and periphery of the shell accommodate the mainboard, the battery, the loudspeaker, the microphone and the interface device, and the screen is part of the mobile phone surface and faces outward. Other technologies of the mobile phone can be used, such as E-SIM card technology, screen sound technology, wireless charging technology, Bluetooth technology and the like. The feature is that a toothed radial synchronous hinge is additionally arranged between the structure of the mobile phone additional screen and the mobile phone body structure. The two ends of the hinge are respectively rooted in the structure of the mobile phone additional screen and the mobile phone body structure by means of bonding, welding, riveting, excessive rigid or elastic connecting means, and the installation position of the hinge is below the OLED composite layer.

[0015] Further, the resistance structure of the fixed-axle distance gear synchronous hinge is characterized in that the resistance structure directly utilizes the friction force of the movement surface of the rotating shaft, the radial sliding groove or the sliding column U-shaped sliding way, or the elastic mechanism of the buckle function, the spring push-pull mechanism. The elastic mechanism refers to that the positioning recess and the elastic body protrusion (the elastic body protrusion can be part of the original structure or a steel ball or block constrained by the surrounding boundary which is additionally arranged on the structure) are respectively arranged or processed on the two components in relative motion in the hinge. The embedding of the elastic body into the positioning recess caused by the relative motion between the two components forms the resistance positioning function. The spring push-pull mechanism utilizes at least one end of the spring connected to the moving component of the hinge, and changes the force direction of the moving component by changing the position of the two connection points of the spring.

[0016] Further, since the screen is in the outer circle part of the fixed-axle distance gear synchronous hinge, the required screen length is different in the bending and flat states. The length of the bent screen is slightly longer than that in the flat state, and the length difference can be more than 1 mm. Therefore, the constraint of the screen by the periphery of the mobile phone additional screen is relaxed, so that the screen can be allowed to move a small amount, or the two ends of the hinge are connected between the structure of the mobile phone additional screen and the mobile phone body structure, and an external spring and a straight line constraint are additionally arranged to elastically adjust the distance between the structure of the mobile phone additional screen and the mobile phone body structure to adapt to the length change of the screen assembly.

[0017] The present application has the advantages of greatly simplifying the structure of the bending screen mobile phone, and being light, thin and beautiful. [SUMMARY]

[0018] Figure 1 Structure diagram of fixed-axle distance gear synchronous hinge

[0019] Figure 2 Synchronous bending diagram of fixed-axle distance gear synchronous hinge

[0020] Figure 3 Schematic diagram of variable wheelbase gear synchronous hinge structure

[0021] Figure 4 Schematic diagram of variable wheelbase gear synchronous hinge coordination bending

[0022] Figure 5 Folding screen mobile phone appearance diagram with variable wheelbase gear synchronous hinge

[0023] Explanation of reference numerals:

[0024] 1 structure bar 1

[0025] 2 radial slider

[0026] 3 radial sliding groove

[0027] 4 rotating shaft 1

[0028] 5 synchronous gear

[0029] 6 sliding column

[0030] 8 rack

[0031] 9 card pulling hole part

[0032] 10 card pulling column part

[0033] 11 mirror-symmetrical other end

[0034] 12 explosion diagram

[0035] 13 OLED composite layer

[0036] 15 hinge layer

[0037] 16 interconnected shaft hole

[0038] 17 normal line

[0039] 18 enlarged view

[0040] 19 mobile phone additional screen

[0041] 20 mobile phone main body structure

[0042] 21 folded mobile phone screen

[0043] 22 two end regions of hinge

[0044] 23 mobile phone screen placement surface

[0045] 24 rotating shaft 2

[0046] 25 structure bar 2

[0047] 26 card slot

[0048] 27 the wheelbase after the hinge is bent

[0049] 28 the wheelbase after the hinge is straightened

[0050] 29 the card is pulled

[0051] 30 the wheelbase scale is changed

[0052] 31 the structure bar after fitting

[0053] [Example]

[0054] The preferred embodiments of the present application are further described below in conjunction with the accompanying drawings:

[0055] As Figure 1 , Figure 2 shown:

[0056] Figure 1 The explosion diagram (12) in the figure is to express the assembly relationship of the parts, and the enlarged view (18) is a local enlargement. For the sake of brevity, the structure of the other end (11) which is mirror-symmetric is not drawn. The structures of the two ends of the whole hinge are radially symmetric. Each of the two ends of a structure bar 1 (1) is provided with a radial slider 2, and a total of two radial sliders are provided, with a quantity ratio of 1:2.

[0057] The structure of the fixed wheelbase gear synchronous hinge is that the structure bars 1 (1) are connected to each other by means of the rotating shafts 1 (4), and the structure bars 1 (1) can rotate relative to each other around the rotating shafts 1 (4). The angle of rotation can be constrained by the external shape of the structure bars 1 (1).

[0058] The slide column 6 of the radial slider 2 is embedded in the radial slide groove 3 of the structure bar 1 (1) to freely slide, and the synchronous gear 5 of the structure bar 1 (1) is in mesh with the rack 8 of the radial slider 2, so that when the structure bars 1 (1) can rotate relative to each other around the rotating shafts 1 (4), the radial slider 2 is driven by the synchronous gear 5 to move along the direction of the radial slide groove 3. On the other hand, the two adjacent radial sliders 2 are connected to each other by means of the nesting and plug-in fit between the card pulling hole part 9 and the card pulling column part 10. After the plurality of structure bars 1 (1) are connected to each other by means of the rotating shafts 1 (4), a hinge is formed, thereby constraining the displacement linkage of all the radial sliders, so that the axes of the rotating shafts 1 are all on the circumference of the same cylinder surface when the whole hinge is bent. We define the normal line of the circumference of the cylinder surface as the radial direction, and the radial slide groove 3 is in this direction.

[0059] The structure bars 1 (1) can rotate relative to each other around the rotating shafts 1 (4). The angle of rotation can be constrained by the external shape of the structure bars 1 (1).

[0060] Mainly from the side Figure 2As can be seen from the figure, the two interconnected shaft holes (16) of each structural strip 1 (1) are connected to each other, forming a complete hinge, Figure 2 The left end of the figure shows the connection relationship between the structural strip 1 (1) and the radial slider (2) in the straight state of the hinge, Figure 2 The right end of the figure shows the mutual driving relationship between the structural strip 1 (1) and the radial slider (2) of the 6 interconnected hinge structures bent by 180 degrees; it can also be seen that the direction of the normal line (17) is consistent with the displacement direction of the radial slider (2).

[0061] As shown in Figure 3 , Figure 4 ,

[0062] Inherited the basic structure of Figure 1 , Figure 2 , the difference is that the structural strip is divided into two bodies and then combined, and the combined structural strip (31) is completed by connecting the structural strip 1 (1) and the structural strip 2 (25) processed with the rotating shaft 2 (24), and the structural strip 1 and the structural strip 2 can rotate freely around the hinge shaft; the combined structural strip (31) is interconnected through the rotating shaft 1 (4), and in addition to the structural features in Figure 1 , 2 , the combined structural strip (31) is additionally provided with a push card (29) matched with the push slot (26) processed on the structural strip 2 (25); when the radial slider (2) is displaced under the constraint of the radial sliding groove (3), the push card (29) on the radial slider (2) will push the structural strip 2 to rotate relative to the structural strip 1 around the rotating shaft 2 (24); as can be clearly seen from Figure 4 , the shaft distance of the bent and straight hinge changes significantly: the shaft distance (27) of the bent hinge is smaller than the shaft distance (28) of the straight hinge, which is consistent with the change amount shown by the variable shaft distance scale (30) of Figure 3 .

[0063] As shown in Figure 5 ,

[0064] The structure of the two end regions (22) of the hinge is the same as that of Figure 1 , 2The displayed structure is the same, and the length of structural strip 1 is almost equal to the distance between the two end areas mentioned above; the folded mobile phone screen (21) is connected to the main body of the mobile phone through the two sides of the hinge. The OLED composite layer (13) includes the OLED display layer, the surface anti-scratch protection layer, etc., and a soft base material layer is required at least in the bending section. The next layer is the hinge layer (15), which can use a variable axis pitch gear synchronous hinge or a fixed axis pitch gear synchronous hinge. Since the fixed axis pitch gear synchronous hinge must deal with the mismatch between the inherent length of the screen in the straight and folded states, either the screen composite layer is placed as much as possible on the hinge pivot connection surface, or a fixed structure with a certain degree of elastic freedom at the two ends of the hinge is combined, which greatly increases the difficulty of the structure.

[0065] The hinge is constructed by bonding, welding, riveting, or using rigid or elastic components to connect the two sides of the phone's attached screen (19) and the main body structure (20) of the phone respectively; and the hinge is installed below the OLED composite layer. These connection methods are all conventional connections, and the contact point is on the shell or the phone frame.

[0066] A soft substrate layer is placed between the OLED composite layer (13) and the hinge layer (15) to provide cushioning and protection. The phone's screen assembly is placed on... Figure 1 , 2 The surface of the mobile phone screen (23) shown.

Claims

1. A variable-pitch gear synchronous hinge, which is configured to include a structural strip, a rotating shaft and a radial slider; characterized in that The structure strip combination comprises at least two structure strip parts, the radial sliding groove, the gear and the pushing groove are processed along the direction of the structure strip, the two parts are also processed with the interconnection shaft hole for the hand-in-hand interconnection, the structure of the radial sliding block comprises the radial sliding column, the gear rack and the pushing block for matching with the structure strip part, the assembly relationship is that the radial sliding block is connected with the radial sliding groove on one of the structure strip parts through the radial sliding column for the sliding matching, and the pushing block of the radial sliding block is connected in the pushing groove of the other structure strip part, all the structure strip combinations are connected with the hinge shaft in the hand-in-hand interconnection mode through the rotating shaft, thus the hinge composed of the structure strip, the rotating shaft and the radial sliding block is formed, when the hinge is bent, the radial sliding block and the structure strip are driven through the gear rack and the gear and the pushing groove and the pushing block, the specific driving matching corresponding relationship is that the gear matches the gear rack, the pushing block corresponds to the pushing groove, the radial sliding block also comprises the pushing block hole part and the pushing block column part, the pushing block hole part and the pushing block column part between the radial sliding blocks are in the nesting matching relationship, when the structure strips rotate around the rotating shaft, the radial sliding block is driven by the synchronous gear and moves along the direction of the radial sliding groove, the pushing block on the radial sliding block pushes the structure strip to rotate relative to the other structure strip.

Images