CN111726435A - Variable wheelbase gear synchronous hinge and its folding screen mobile phone - Google Patents

Abstract

A variable wheelbase gear synchronous hinge and a folding screen mobile phone thereof belong to mechanical technology. The structure includes: structure bar, rotating shaft, radial slider, the structure of radial slider includes: radial sliding column or chute, rack, gear or dial slot or dial card for separate coordination with the structure bar; assembly The relationship is as follows: the radial slider is connected with the sliding groove or the sliding column of one of the structural strip parts, and at the same time, the dial of the radial slide block is inserted into the dial groove of the other structural strip part; All the structural bars are connected by hand in hand to connect the connecting holes or the hinge shafts of the connecting shafts; when the hinge is bent, the radial sliders and the racks, gears or dials that are engaged with each other are machined on the structural bars. The grooves or the dials are mutually driven, and the driving structures are processed on the radial sliders or structural bars respectively. A toothed radial synchronous hinge is installed on the folding screen mobile phone with the variable wheelbase gear synchronous hinge; and the hinge's The installation position is located under the OLED composite layer, forming various forms of folding screen mobile phones.

Description

Variable wheelbase gear synchronous hinge and its folding screen mobile phone

[Technical field]

The invention belongs to the field of structural design; to be precise, the linkage control of radial synchronous displacement components driven by teeth or dials is used to achieve the purpose of increasing the screen.

[Background technique]

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.

The overall structure of a smartphone: A smartphone can be thought of as a pocket computer. It has processor, memory, input and output devices (keyboard, display screen, USB interface, headphone interface, camera, etc.) and I/O channels. The mobile phone communicates with the base station through the air interface protocol (such as GSM, CDMA, PHS, etc.), which can transmit both voice and data.

The main circuit board of a smartphone is the most important part of the phone: it is located inside the smartphone and is connected to the various components through data cords or contacts. The main circuit board can be said to be the core component of the mobile phone. It is responsible for the input, output, processing, and transmission of mobile phone signals, as well as the power supply and control of the whole machine. The design of the circuit boards of different brands of smartphones will be different. Some smartphones have only one circuit board, and some smartphones have sub circuit boards in addition to the main circuit. The secondary circuit board is generally connected to accessories such as interfaces and cameras. The main circuit board of the smartphone is equipped with SMD components, which are arranged very closely, and the main chips on the circuit board are soldered 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, which is responsible for the power supply, control and the realization of various functions of the mobile phone. The circuits of smart phones mainly include: radio frequency circuit, voice circuit, processor and memory circuit, power supply and charging circuit, operation and screen display circuit, interface circuit, and other functional circuits (such as Bluetooth, antenna, radio, sensor, vibrator, camera circuit, etc.), as shown in Figure 4.

The specific design process includes: the determination of the motherboard scheme, the determination of the shape of the mobile phone, the structural modeling, the production and appearance adjustment of the appearance prototype, the structural design, the optimization of the structure design: the structure review, the verification of the large structure prototype, etc. In addition It still has to go through; mold review, project follow-up during mold casting, mold trial and mold modification, trial production, mass production process. In the field of mobile phone structure, folding screen technology is undoubtedly the development trend:

Folding screens have become the best solution to promote the "integration" of mobile phones and tablets: Samsung, the originator, has been implementing it for many years, and demonstrated the "Infinity Flex Display" folding screen solution at the Samsung SDC Developer Conference. The launch of Samsung's first foldable screen mobile phone, the Galaxy Fold, not only solves the contradiction between the screen size and portability of the mobile phone, but also brings a better visual experience. Therefore, the industry generally believes that the folding screen is expected to follow the full screen. Leading another round of mobile phone revolution. Goldman Sachs, the world's top investment bank, sees the Samsung Galaxy Fold as a "major potential challenge" for Apple. Judging from the press conference, the Galaxy Fold has features that are different from traditional mobile phones, such as being equipped with an ultra-border folding screen, providing up to 6 cameras and a dual-battery system configuration. It should be said that the Galaxy Fold not only provides a satisfying visual experience, but also surpasses the level of traditional flagships in terms of photography, performance and battery life. Therefore, Galaxy Fold will not only bring about changes in mobile phone screens, it will even promote the mobile phone industry to a higher level. In the demonstration, the effect is still very amazing. You can see that the tablet-sized screen is folded inward and becomes a small screen, while the outer display is no different from the mobile phones we use every day. It is full of technology and completely jumps out of the present. It is not an exaggeration to say that mobile phone manufacturers are in the rut of full-screen exploration. Different from the previous hinge design, Samsung's "Infinity FlexDisplay" folding screen is to fold a whole screen. According to the folding screen patent applied for by Samsung, this folding screen has two electrode layers, which can be energized separately, and the bottom substrate is It is made of flexible plastic material, which can facilitate the bending and folding of the screen. From the structural design point of view, the Galaxy Fold adopts an inward folding design, which can be opened or closed. When closed, the user is presented with a cover display with a size of 4.6 inches, a resolution of 1960x840 pixels, a screen density of 420ppi, and an aspect ratio of 21:9, which is similar in size to an ordinary mobile phone. After opening the Galaxy Fold, the user is presented with a main display with a size of 7.3 inches, a resolution of 2152x1536 pixels, an aspect ratio of 4.2:3, and a screen density of 420ppi. In layman's terms, in the closed state, the Galaxy Fold is an ordinary smartphone, and in the unfolded state, the Galaxy Fold turns into a tablet computer. It is easy to understand just by looking at the structure. The question is how to ensure that the screen performance does not drop during the opening and closing process, so that users can have a smooth and comfortable experience. This has to mention Samsung's new ultra-border folding screen, which can be bent 360 degrees to meet any folding needs. Based on this screen technology, in the process of repeatedly opening and closing the screen, the screen performance is always in the best state, so that the user will not experience any visual disconnection. Whether the Galaxy Fold is open or folded, the apps it displays transition seamlessly, allowing users to switch between the home and cover screens at any time. Samsung says all regular Android apps will work flawlessly on the Galaxy Fold if developers allow them to scale the app, such as when the phone is switched from portrait to landscape mode, the system will also adjust to the tablet mode application. In addition, the Galaxy Fold can also provide users with a more efficient experience in open mode to adapt to more complex scene needs. The Galaxy Fold's powerful multi-window capability can handle three tasks simultaneously.

The hinge design of Huawei and Apple's folds is extremely complicated. Huawei adopts a 5-segment turn design, uses more than 100 parts, and takes 3 years of painstaking research and development; Apple's similar design uses more than 200 The technical difficulty lies in the need for real-time equal-radius and beautiful unfolding at the bend, which not only requires a certain amount of support, but also requires a service life of more than 100,000 times.

Samsung has also expanded a 3-layer folding and stacking stretch screen phone, similar to a "scrolling" experience. The patent document shows that it needs to be bent and stretched from two directions; the degree of difficulty is much higher than that of 2-layer folding. Screen.

[Content of the Invention]

Defects of existing products: The current design representatives of the mobile phone bending mechanism are: Samsung, Apple, Lenovo, etc.; the common shortcomings of their design ideas: in order to meet the needs of the non-stretchable screen after bending, or the hinge bending cannot be changed. In the case of the rear length, move the hinge 2 ends to fit; or use an extremely complex linkage mechanism to change the link spacing.

Purpose of the present invention: Aiming at the defects of current products, design a kind of OLED bending hinge suitable for external folding, and use a single gear and rack structure to achieve; it has the advantages of simple structure, space saving, beautiful appearance and reliable operation, etc. advantage.

The present invention has the following characteristics: simple conception, limited cost increase, significant volume reduction, reliable operation and the like.

Specific embodiments of the present invention:

The structure of the variable wheelbase gear synchronous hinge includes: a structural bar 1, a structural bar 2, a rotating shaft 1, a rotating shaft 2, a radial slider, a synchronizing gear, and a rack. The connection between the structure strip 1 and the structure strip 2 is hinged by the structure of the rotating shaft or shaft hole along the structure strip: the structure strip 1 is processed with radial sliding grooves or sliding columns, synchronizing gears which are matched with the radial sliders. Or racks or dials or dials; the structural bar 2 is processed with a sliding groove or a sliding column that matches the radial slider; the structure of the radial sliding block includes: a radial sliding column or a sliding groove that cooperates with the structure bar 1 , rack, gear or dial slot or dial card and slide column or slide slot matched with structural bar 2; the assembly and working principle of variable axle distance gear synchronous hinge is: firstly put all structural bars 1 and 2 in between The hinged connection is made at the rotating shaft 2, which is called a combination, and then the rotating shaft 1 of the combined structural strip 2 is connected with the hinge shaft in a hand-in-hand manner to form a chain; then the radial slider and the structural strip are connected. 1 is connected by the matching relationship between the chute or the sliding column, and the displacement under the mutual linear constraint between the radial slider and the structural bar 1 is satisfied. The mutual drive of the racks or gears or the dials or the dials on the radial slider (the driving structures are respectively processed on two objects that move relatively, the corresponding relationship: the gears match the racks, and the dials correspond to the dials), so that A mutual displacement occurs between the radial slider and the structural bar along the direction of the chute. At the same time, the card-pulling holes between the radial sliders and the card-pulling column are nested and fitted. When the entire hinge is bent, the radial sliders will be linked and bound on the same cylindrical surface. The curvature of the whole hinge is made the same everywhere; at the same time, the synchronous radial movement of each radial slider will also change the rotation axis between the structural bar 1 and the structural bar 2 through the cooperation between the sliding grooves or the sliding columns. 2 The included angle under the constraint, when the hinge bending increases, the included angle will decrease, otherwise, it will increase; in this way: when the hinge bending increases, the radial slider is displaced to the outside, on the one hand, the rotating shaft 1 makes the structural bar 1 and the The angle between the structural bars 2 is increased, and on the other hand, the radial slider displaced to the outside reduces the angle between the structural bars 1 and 2 in each unit, and the increase and decrease appear to offset each other. The function of the hinge makes the length of the peripheral contour of the curved hinge in any state remain unchanged (so that the screen component layer around the hinge is almost not disturbed by deformation); in order to make the hinge straight and rigid when the screen of the mobile phone is unfolded In order to solve the problem of clamping when the hinge is straightened, it is required to have a blocking structure on the hinge when the hinge is straightened.

The main structure of a folding screen mobile phone with a variable wheelbase gear synchronous hinge includes: a main board, a camera, a battery, a speaker, a microphone, a wired or wireless interface device, a screen, and a housing; the assembly relationship is that the interior and periphery of the housing accommodate: Motherboard, battery, speaker, microphone, interface device, and the screen as part of the surface of the mobile phone, and the display surface is facing outward; other technologies of the mobile phone can be used, such as: E-SIM card issuing technology, screen sound technology, wireless charging technology; Bluetooth technology, etc.; its characteristics are: a toothed radial synchronous hinge is installed between the structure of the additional screen of the mobile phone and the main structure of the mobile phone; the two ends of the hinge are bonded, welded, riveted, excessively rigid or The connection modes of the elastic members are respectively rooted in the structure of the additional screen of the mobile phone and the main structure of the mobile phone; and the installation position of the hinge is located below the OLED composite layer.

Further: the blocking structure described in the fixed wheelbase gear synchronous hinge is characterized in that: the blocking structure directly utilizes the friction force on the surface of the moving surface of the rotating shaft, the radial chute or the sliding column U-shaped chute; or The elastic mechanism and the spring push-pull mechanism with the buckle function, the elastic mechanism refers to the positioning depression and the elastic body protrusion are respectively installed or processed on the two relative moving parts in the hinge (the elastic body protrusion can be the original structure A part of the part, it can also be a steel ball or block that is constrained by the surrounding boundary and is lifted by an elastic sheet or a spring attached to the structural part, and the embedding of the elastic body to the positioning recess caused by the relative movement between the two parts That is, the resistance positioning function is formed; the spring push-pull mechanism uses at least one end of the spring to be connected to the moving part of the hinge, and uses the change of the position of the two connection points of the spring to change the force direction of the moving part.

Further: Since the screen is in the outer circle part bent by the fixed wheelbase gear synchronous hinge, the required screen length is different in the bent and flattened states. The length of the bent screen is slightly longer than that in the straight state. The difference in length can reach more than 1mm; therefore, either keep the slack state of the constraints on the screen around the additional screen of the mobile phone, so that the screen can allow a small amount of string movement; or make the two ends of the hinge and the structure of the additional screen of the mobile phone and the main body of the mobile phone. When the structures are connected, extra push springs and linear constraints are installed to flexibly fine-tune the distance between the structure of the additional screen of the mobile phone and the main structure of the mobile phone to adapt to changes in the length of the screen components.

The beneficial effects of the present invention are: the structure of the mobile phone with a bent screen is greatly simplified, and the device is light, thin and beautiful.

[Description of drawings]

Figure 1 Schematic diagram of the structure of the fixed wheelbase gear synchronous hinge

Figure 2 Schematic diagram of synchronous coordinated bending of fixed wheelbase gear synchronous hinge

Figure 3 Schematic diagram of the structure of the variable wheelbase gear synchronous hinge

Figure 4 Schematic diagram of coordinated bending of variable wheelbase gear synchronous hinge

Figure 5 Outline diagram of a folding screen mobile phone with variable wheelbase gear synchronous hinge

Label description:

1 Structural bar 1

2 radial sliders

3 Radial chutes

4 Spindle 1

5 Synchronous gears

6 struts

8 racks

9 Card hole

10 Dial card column

11 The other end of the mirror symmetry

12 Exploded Diagram

13 OLED composite layers

15 Hinge Layer

16 Interconnect shaft hole

17 Normals

18 Enlarged image

19 Mobile phone additional screen

20 Main structure of mobile phone

21 Folded phone screen

22 2 end regions of the hinge

23 Mobile phone screen placement surface

24 Spindle 2

25 Structural strips 2

26 Slots

27 Wheelbase after hinge bending

28 Wheelbase with straight hinges

29 Dial card

30 variable wheelbase scale

31 Structural strips after fitting

[Example]

Below in conjunction with accompanying drawing, the present invention is further described with respect to preferred embodiment:

As shown in Figure 1 and Figure 2:

The exploded view (12) in Figure 1 is to express the assembly relationship of the parts, and the enlarged view (18) is a partial magnification. For the purpose of expressing the introduction, the structure of the other end (11) of the mirror symmetry is not drawn; the structure of the two ends of the entire hinge It is radially symmetric, and one radial slider (2) is arranged at each end of a structural bar 1 (1), a total of 2 are arranged, and the quantity ratio is 1:2.

The structure of the fixed wheelbase gear synchronous hinge is as follows: the structural bars 1 (1) are connected to each other by means of the rotating shaft 1 (4), and the structural bars 1 (1) can be mutually rotated around the rotating shaft 1 (4); the angle of rotation Constraints can be made by virtue of the outer shape of the structural strip 1(1).

The sliding column (6) of the radial slider (2) is inserted into the radial sliding groove (3) of the structural bar 1 (1) and slides freely. The synchronizing gear (5) of the structural bar 1 (1) is connected to the radial 2) The racks (8) are engaged with each other, so that when the structural bars 1 (1) can rotate around the shaft 1 (4), the radial slider (2) is driven by the synchronizing gear (5) to move along the Move in the direction of the radial sliding groove (3), on the other hand, between the two adjacent radial sliding blocks (2) through the insertion between the card hole (9) and the card column (10) Sleeve fitting, multiple structural bars 1 (1) are connected to each other by the rotating shaft 1 (4) to form a hinge, thereby constraining the displacement linkage of all the radial sliders, so that when the entire hinge is bent, the rotation of each rotating shaft 1 is The axes are all on the circumference of the same cylinder, and we define the normal to the circumference of the cylinder as radial, and the radial chute (3) is in this direction.

The structural bars 1(1) can be mutually rotated around the rotating shaft 1(4); the rotation angle can be constrained by the external shape of the structural bars 1(1).

It can be seen mainly from the side view Figure 2: after the two interconnecting shaft holes (16) of each structural strip 1 (1) are interconnected with each other hand in hand, a complete hinge is formed. The connection relationship between each structural bar 1 (1) and the radial slider (2), the right end of Figure 2 shows the structural bar 1 (1) and the radial slider (2) with 6-segment interconnected hinge structure bent by a total of 180 degrees It can also be seen that the direction of the normal (17) is consistent with the displacement direction of the radial slider (2).

As shown in Figure 3 and Figure 4:

Inheriting the basic structure of Figure 1 and Figure 2, the difference is that the structural strip is divided into two parts and then combined, the combined structural strip (31) is made of the structural strip 1 (1) processed with the rotating shaft 2 (24). and the structural bar 2 (25), which are connected by a hinge shaft, and the structural bar 1 and the structural bar 2 can freely rotate around the hinge shaft; In addition to the structural features shown in Figures 1 and 2, the slider (2) is additionally provided with a dial card (29) that cooperates with the dial groove (26) processed on the structural bar 2 (25). When the slider (2) is displaced under the constraint of the radial chute (3), the card (29) on the radial slider (2) will push the structural bar 2 relative to the structural bar 1 around the rotating shaft 2 (24) Rotation; it is obvious from Figure 4 that the wheelbase of the bent and straightened hinges has a significant change: the wheelbase (27) after the hinge is bent is smaller than the wheelbase (28) after the hinge is straightened, which is different from the change in Figure 3. The wheelbase scale (30) shows the same amount of change.

As shown in Figure 5:

The structure of the two end regions (22) of the hinge is the same as that shown in Figures 1 and 2, and the length of the structural strip 1 is almost equal to the distance between the two end regions; The side is connected to the main body of the mobile phone. The OLED composite layer (13) includes an OLED display layer, a surface anti-scratch protection layer, etc., a soft base material layer is required at least in the bending section, and the next layer is a hinge layer (15), which can use a variable wheelbase gear synchronous hinge or Fixed wheelbase gear synchronised hinge. Since the use of a fixed-wheelbase gear synchronous hinge must deal with the mismatch of the inherent length of the screen in the straightened and folded state, either the screen composite layer should be placed on the hinge's shaft connection surface as much as possible, or combined with the two ends of the hinge. The fixed structure of the elastic degree of freedom greatly increases the difficulty of the structure.

The two-sided structure of the hinge is rooted and combined with the structure of the additional screen (19) of the mobile phone and the structure of the main body structure (20) of the mobile phone by means of bonding, welding, riveting, excessive rigidity or elastic member connection respectively; and the installation position of the hinge is located at Below the OLED composite layer, this connection method is a conventional connection, and the contact point is on the casing or the frame of the mobile phone.

The soft base material layer is placed between the OLED composite layer (13) and the hinge layer (15) for buffering and protection. The screen component of the mobile phone is placed on the surface (23) of the mobile phone screen placement surface shown in Figs. 1 and 2 .

Claims (2)

1. The variable-wheelbase gear synchronous hinge structurally comprises: the structure strip, the rotating shaft and the radial sliding block; it is characterized in that one structural strip combination body comprises at least 2 structural strip split bodies: there is structure strip components of a whole that can function independently connecting hole or connecting axle along the trend processing of structure strip, and 2 components of a whole that can function independently still processes connecting hole or connecting axle that are used for hand in hand interconnection, and the structure of radial slider is including being used for with structure strip components of a whole that can function independently complex: a radial sliding column or a sliding chute, a rack, a gear or a shifting groove or a shifting card; the assembly relation is as follows: the radial sliding block is connected with one of the structural strip split bodies in a sliding fit sliding groove or sliding column connection mode, and meanwhile the radial sliding block is clamped in the shifting groove of the other structural strip split body; all the structure strip combination bodies are connected by the hinge shaft of the connecting hole or the connecting shaft in a hand-in-hand interconnection mode; this forms a hinge consisting of three main parts; when the hinge is bent, the radial sliding block and the rack, the gear or the shifting groove or the shifting card which are processed on the structure strip and are meshed with each other are mutually driven, the driving structure is respectively processed on the radial sliding block or the structure strip, and the corresponding relation of specific driving matching is selected as follows: the gear is matched with the rack and the shifting block and corresponds to the shifting groove, and the shifting block hole part and the shifting block column part between the radial sliding blocks are in a nested matching relationship.

2. Folding screen cell-phone with synchronous hinge of variable wheel base gear, the structure includes: the system comprises a main board, a camera, a battery, a loudspeaker, a microphone, a wired or wireless interface device, a screen and a shell; the assembly is such that the interior and periphery of the housing accommodates: the mobile phone comprises a main board, a battery, a loudspeaker, a microphone and an interface device, wherein a screen is used as a part of the surface of the mobile phone, and the display surface faces outwards; the method is characterized in that: the combination between the structure of the additional screen of the mobile phone and the main structure of the mobile phone is additionally provided with a meshing radial synchronous hinge; the 2 ends of the hinge are connected by bonding, welding, riveting and excessive rigid or elastic components, namely, the structure of the additional screen of the mobile phone and the main structure of the mobile phone take root respectively; and the installation position of the hinge is positioned below the OLED composite layer.

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