Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application 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.
As used herein, "terminal device" refers to a device capable of receiving and/or transmitting communication signals that includes, but is not limited to, devices connected via any one or several of the following connections:
(1) Via a wireline connection, such as via a public-switched telephone network (Public Switched Telephone Networks, PSTN), a digital subscriber line (Digital Subscriber Line, DSL), a digital cable, a direct cable connection;
(2) Via a wireless interface, such as a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter.
A terminal device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:
(1) Satellite phones or cellular phones;
(2) A personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities;
(3) A radio telephone, pager, internet/intranet access, web browser, notepad, calendar, personal digital assistant (Personal DIGITAL ASSISTANT, PDA) equipped with a global positioning system (Global Positioning System, GPS) receiver;
(4) Conventional laptop and/or palmtop receivers;
(5) Conventional laptop and/or palmtop radiotelephone transceivers, and the like.
Referring to fig. 1 and 2, in one embodiment, the folder mobile terminal 10 is a smart phone. The folder mobile terminal 10 includes a display 100, a housing assembly 200, and a folder mechanism 300. Referring to fig. 3 and 4 together, the case assembly 200 includes a first case 210 and a second case 220, and the first case 210 and the second case 220 are connected to the display 100, respectively. The display screen 100 can be used for displaying information and providing an interactive interface for a user, and the display screen 100 can be fixedly connected to the first housing 210 and the second housing 220 by dispensing or the like. The first and second cases 210 and 220 may respectively form an installation space for installing electronic components such as a circuit board, a battery, a receiver, a speaker, a camera, etc. of the folder type mobile terminal 10. The circuit board may integrate electronic components such as a main controller, a storage unit, an antenna module, a power management module, etc. of the folding mobile terminal 10, and the battery may supply power to the electronic components such as the display 100, the circuit board, the receiver, the speaker, the camera, etc. In other embodiments, the folder mobile terminal 10 may also be a tablet computer or the like.
Referring to both fig. 3 and 4, the case assembly 200 is capable of enabling the folder mobile terminal 10 to be switched between an unfolded state and a folded state by the folder mechanism 300. The folding mechanism 300 includes a carrier 310, a first cover 320, a second cover 330, a first rotating arm 340 and a second rotating arm 350, where the first cover 320 and the second cover 330 are bar-shaped, and the first cover 320 and the second cover 330 are respectively connected with the carrier 310 in a rotating manner. Referring to both fig. 5 and 6, the first and second swivel arms 340, 350 are generally L-shaped. Referring to fig. 7 and 8, both ends of the first rotary arm 340 are rotatably coupled to the carrier plate 310 and the first housing 210, respectively, and both ends of the second rotary arm 350 are rotatably coupled to the carrier plate 310 and the second housing 220, respectively. Further, a side of the first rotating arm 340 facing away from the display screen 100 may be a curved surface, so that at least a portion of the cross section of the first rotating arm 340 is substantially an elliptical arc. Similarly, the side of the second rotating arm 350 facing away from the display screen 100 may also have a smooth arc surface, so that at least a portion of the cross section of the second rotating arm 350 is substantially an elliptical arc. In other embodiments, the cross-section of the first rotating arm 340 and the cross-section of the second rotating arm 350 may be other similar curves.
Referring to fig. 9, 10 and 11, when the folder type mobile terminal 10 is switched between the unfolded state and the folded state, the first housing 210 can drive the first cover plate 320 to rotate relative to the carrier plate 310, and meanwhile, the first housing 210 slides and stretches relative to the first cover plate 320, and the second housing 220 can drive the second cover plate 330 to rotate relative to the carrier plate 310, and meanwhile, the second housing 220 slides and stretches relative to the second cover plate 330. Specifically, during the process of switching the folder-type mobile terminal 10 from the unfolded state to the folded state, the first housing 210 can slide with respect to the first cover 320, the second housing 220 can slide with respect to the second cover 330, and the length of the housing assembly 200 can be adaptively extended. During the process of switching the folder-type mobile terminal 10 from the closed state to the extended state, the first housing 210 can slide with respect to the first cover 320, the second housing 220 can slide with respect to the second cover 330, and the length of the housing assembly 200 can be adaptively shortened.
Since the first housing 210 can slide and stretch relative to the first cover 320, and the second housing 220 can slide and stretch relative to the second cover 330, the length of the housing assembly 200 can be adaptively increased or decreased during the unfolding and folding process of the folding mobile terminal 10, so as to satisfy the change of the length difference between the display 100 and the housing assembly 200, thereby realizing the smooth unfolding and folding of the folding mobile terminal 10.
Referring to fig. 1 and 2, in an embodiment, the folder type mobile terminal 10 has a substantially rectangular block shape in an unfolded state, and a coordinate system may be established with reference to the unfolded state of the folder type mobile terminal 10, to define a length direction of the folder type mobile terminal 10 as an x-axis, a width direction as a y-axis, and a thickness direction as a z-axis. Referring to fig. 5 and 6 together, the first and second rotating arms 340 and 350 are spaced apart in the y-axis direction, and the first and second rotating arms 340 and 350 are provided in pairs, i.e., one first rotating arm 340 and one second rotating arm 350 form a pair. For example, in the embodiment shown in fig. 5 and 6, the folder type mobile terminal 10 includes two first swing arms 340 and two second swing arms 350, and two pairs may be formed as described above, one pair being disposed at one end of the carrier plate 310 and the other pair being disposed at the other end of the carrier plate 310. Taking one pair as an example, the first swing arm 340 is closer to the edge of the display 100 than the second swing arm 350 in the width direction of the folder type mobile terminal 10. Of course, in other embodiments, the folder type mobile terminal 10 may be provided with only one first swing arm 340 and one second swing arm 350, which are respectively provided at both ends of the carrier plate 310. Or the folder type mobile terminal 10 may be provided with more than two pairs of the first and second swing arms 340 and 350.
In one embodiment, the display 100 is flattened when the folder mobile terminal 10 is fully unfolded, at which time the folder mobile terminal 10 has the effect of a large screen display. Referring to fig. 3, in the folded state, the first housing 210 is stacked on the second housing 220, and the display screen 100 is sandwiched between the first housing 210 and the second housing 220. Specifically, referring to fig. 12, 13 and 14, the display screen 100 is a flexible screen, and the flexible screen includes a bendable portion 110 and planar areas 120 connected to two sides of the bendable portion 110, and the flat state of the flexible screen is taken as a reference zero position of an angle, and when the flexible screen has a limited bending radius, the included angle between the planar areas 120 on two sides of the bendable portion 110 of the flexible screen may be an acute angle or the planar areas 120 on two sides may be parallel to each other when the folding mobile terminal 10 is folded. Of course, in other embodiments, the display 100 may include two LCD (Liquid CRYSTAL DISPLAY) panels, which are respectively connected to the first housing 210 and the second housing 220, and are connected to each other by a flexible material such as silicone, so as to be bent. Alternatively, the display screen 100 may include two OLED (organic light-Emitting Diode) screens connected to the first and second cases 210 and 220, respectively, and connected therebetween using a flexible material such as a silicone or the like to facilitate bending.
Referring to fig. 12, 13, 14 and 15, a geometric plane perpendicular to the width direction (y-axis direction) of the folder mobile terminal 10 is made and taken as a reference plane. Of course, the reference plane may be obtained by taking the rotation axis of the first cover plate 320 or the second cover plate 330 as a reference and making a geometric plane perpendicular to the rotation axis of the first cover plate 320 or the second cover plate 330. In the closed state, the orthographic projections of the first swivel arm 340 and the second swivel arm 350 on the reference plane intersect. When the cross section of the first rotating arm 340 is approximately in an elliptical arc shape, the cross section of the second rotating arm 350 is approximately in an elliptical arc shape or other similar curves, in the folded state, the sides of the first rotating arm 340 and the second rotating arm 350 facing the display screen 100 may be closer to the display screen 100 to form an accommodating space adapted to the folded shape of the display screen 100, and the distance between the end of the first rotating arm 340 connected with the first housing 210 and the end of the second rotating arm 350 connected with the second housing 220 may be smaller. The curved first swing arm 340 and the curved second swing arm 350 may form a smaller opening width in the closed state, and thus may allow for a more compact arrangement of components to provide a thinner thickness for the folder-type mobile terminal 10 in the closed state.
In the above folding mobile terminal 10, since the orthographic projections of the first rotating arm 340 and the second rotating arm 350 on the reference plane intersect in the folded state, the accommodating space formed by the first rotating arm 340 and the second rotating arm 350 in the folded state for accommodating the bendable portion 110 of the flexible screen is smaller, thereby facilitating compact arrangement of the components of the folding mobile terminal 10 and facilitating thickness reduction of the folding mobile terminal 10 in the folded state. Because the two ends of the first rotary arm 340 rotate relative to the first housing 210 and the carrier 310, and the two ends of the second rotary arm 350 rotate relative to the second housing 220 and the carrier 310, respectively, the above structure can prevent the flexible screen from sliding relative to the first housing 340 or the second housing 350 during the rotation of the folder-type mobile terminal 10, so as to reduce the tensile stress of the housing assembly 200 on the flexible screen, and prevent the flexible screen from being pulled to deform during the rotation, thereby prolonging the service life of the flexible screen.
Referring again to fig. 5 and 6, in one embodiment, the folding mechanism 300 includes a first shaft 312 rotatably connected to the carrier 310 and a second shaft 313, the first rotating arm 340 is connected to the second shaft 313, and the second rotating arm 350 is connected to the first shaft 312. The first rotary arm 340 can rotate relative to the carrier plate 310 through the second rotary shaft 313, and the second rotary arm 350 can rotate relative to the carrier plate 310 through the first rotary shaft 312. Further, the folding mechanism 300 includes a third rotating shaft 314 and a fourth rotating shaft 315 connected to the carrier 310, a first gear 316 connected to the first rotating shaft 312, a second gear 317 connected to the second rotating shaft 313, a third gear 318 connected to the third rotating shaft 314, and a fourth gear 319 connected to the fourth rotating shaft 315, wherein the first gear 316 and the fourth gear 319 are respectively meshed with the third gear 318, and the second gear 317 is meshed with the fourth gear 319. The first housing 210 can drive the second gear 317 to rotate through the first rotating arm 340, and the second housing 220 can drive the first gear 316 to rotate through the second rotating arm 350. The folding mechanism 300 of the above-described structure can realize the synchronous rotation of the first housing 210 and the second housing 220.
Specifically, in an embodiment, the first gear 316, the second gear 317, the third gear 318, and the fourth gear 319 are incomplete gears, the first gear 316 is fixedly connected to the first rotating shaft 312, the second gear 317 is fixedly connected to the second rotating shaft 313, the third gear 318 is fixedly connected to the third rotating shaft 314, and the fourth gear 319 is fixedly connected to the fourth rotating shaft 315. The first gear 316 may be integrally formed with or detachably connected to the first shaft 312, the second gear 317 may be integrally formed with or detachably connected to the second shaft 313, the third gear 318 may be integrally formed with or detachably connected to the third shaft 314, and the fourth gear 319 may be integrally formed with or detachably connected to the fourth shaft 315. The first rotating shaft 312, the second rotating shaft 313, the third rotating shaft 314, and the fourth rotating shaft 315 are respectively rotatably connected to the carrier 310. The first rotating arm 340 is fixedly connected to the second rotating shaft 313, and the second rotating arm 350 is fixedly connected to the first rotating shaft 312. The first casing 210 can drive the second gear 317 to rotate through the first rotating arm 340 and the second rotating shaft 313, and then drive the fourth gear 319 and the fourth rotating shaft 315 to rotate, and the second casing 220 can drive the first gear 316 to rotate through the second rotating arm 350 and the first rotating shaft 312, and then drive the third gear 318 and the third rotating shaft 314 to rotate, so that synchronous rotation of the first casing 210 and the second casing 220 is achieved.
Of course, in other embodiments, the third gear 318 is rotatably connected to the third rotating shaft 314, the third rotating shaft 314 is fixedly connected to the carrier plate 310, the fourth gear 319 is rotatably connected to the fourth rotating shaft 315, and the fourth rotating shaft 315 is fixedly connected to the carrier plate 310. Compared with the structure that both ends of the third rotating shaft 314 and the fourth rotating shaft 315 bear and rotate, the above arrangement can realize the separation of the bearing function and the rotating function, thus enhancing the stability of the structure and preventing the third rotating shaft 314 or the fourth rotating shaft 315 from being damaged due to overlarge rotating force.
Referring to fig. 18, the folder type mobile terminal 10 may further include a damper assembly 400, the damper assembly 400 being connected to the folder mechanism 300, the damper assembly 400 being capable of changing a rotational damping of the case assembly 200 when the folder type mobile terminal 10 is switched between an unfolded state and a folded state. Specifically, referring to fig. 18, the damping assembly 400 includes an elastic member 410 sleeved on the first shaft 312, a movable cam 420 sleeved on the first shaft 312 and capable of sliding along the first shaft 312, and a fixed cam 430 fixedly connected to the carrier plate 310 (refer to fig. 5 and 6). One end of the elastic member 410 abuts against the first rotating shaft 312, and the other end abuts against the moving cam 420. Of course, the elastic member 410 may have one end abutting against the carrier plate 310 and the other end abutting against the moving cam 420. In one embodiment, the elastic member is a spring. When the folding mobile terminal 10 is switched between the unfolded state and the folded state, the second housing 220 drives the first rotating shaft 312 to rotate relative to the bearing plate 310 through the second rotating arm 350, and the first rotating shaft 312 drives the moving cam 420 to rotate and abut against the fixed cam 430. The elastic member 410 is in a compressed state so that the movable cam 420 can press the fixed cam 430, and the frictional force between the movable cam 420 and the fixed cam 430 can be used for the instant positioning of the first housing 210 and the second housing 220 during the unfolding and folding of the folder type mobile terminal 10. Of course, it is understood that the damping assembly 400 may also be disposed on the second rotation shaft 313, the third rotation shaft 314, or the fourth rotation shaft 315 to achieve a clamping effect of the folding mobile terminal 10 during the unfolding and folding processes.
Further, a first protrusion 421 is disposed on a side of the movable cam 420 facing the fixed cam 430, a second protrusion 431 is disposed on a side of the fixed cam 430 facing the movable cam 420, and when the folder-type mobile terminal 10 is switched between the unfolded state and the folded state, the first protrusion 421 can slide on the second protrusion 431 to change the pressing force of the elastic member 410 on the movable cam 420, thereby changing the rotation damping of the housing assembly 200. The cooperation of the first protrusion 421 and the second protrusion 431 may be used to achieve a click-on positioning effect at a specific angle. For example, by designing the start and end positions of the first and second protrusions 421 and 431 at which the movable cam 420 slides along the first rotation shaft 312, the pressing of the movable cam 420 against the fixed cam 430 is suddenly reduced, so that it is possible to provide a clear and timely feedback to the user. For example, the first protrusions 421 or the second protrusions 431 may be disposed to provide a clear and timely pause feeling when the two planar areas 120 of the display screen 100 form an angle of 30 degrees, an angle of 60 degrees, an angle of 90 degrees, or an angle of 120 degrees.
Referring to fig. 5 and 6, the carrier 310 is provided with a receiving groove 360, and the first gear 316, the second gear 317, the third gear 318, the fourth gear 319, the first shaft 312, the second shaft 313, the third shaft 314, and the fourth shaft 315 are disposed in the receiving groove 360. Referring to fig. 6, in the unfolded state, the first and second rotating arms 340 and 350 are received in the receiving groove 360. Referring to fig. 7 and 8 together, the end of the first rotating arm 340 connected to the first housing 210 is further away from the bottom of the receiving groove 360 in the closed state than in the opened state, and the end of the second rotating arm 350 connected to the second housing 220 is further away from the bottom of the receiving groove 360. Further, in an embodiment, in the closed state, an end of the first rotating arm 340 connected to the first housing 210 extends out of the accommodating groove 360, and an end of the second rotating arm 350 connected to the second housing 220 extends out of the accommodating groove 360.
Specifically, referring to fig. 5 and 6, the carrier plate 310 may include a bottom wall 311a, first and second sidewalls 311b and 311c disposed opposite to each other, and first and second end walls 311d and 311e disposed opposite to each other (refer to fig. 7). The first side wall 311b and the second side wall 311c are respectively connected to two side edges of the bottom wall 311a, the first end wall 311d is connected to one ends of the bottom wall 311a, the first side wall 311b and the second side wall 311c, the second end wall 311e is connected to the other ends of the bottom wall 311a, the first side wall 311b and the second side wall 311c, and the first side wall 311b, the first end wall 311d, the second side wall 311c, the second end wall 311e and the bottom wall 311a enclose to form the accommodating groove 360. In an embodiment, the carrier plate 310 may be divided into two sides, i.e., a first side and a second side, from a middle portion of the bottom wall 311a in the y-axis direction. Wherein the first side wall 311b is located on a first side of the carrier 310, the second side wall 311c is located on a second side of the carrier 310, half of the bottom wall 311a, the first end wall 311d, and the second end wall 311e are located on the first side, and the other half of the bottom wall 311a, the first end wall 311d, and the second end wall 311e are located on the second side. The first cover plate 320 is rotatably connected to a first side of the carrier plate 310, and the second cover plate 330 is rotatably connected to a second side of the carrier plate 310. The first cover plate 320 is slidably connected to the first housing 210, the second cover plate 330 is slidably connected to the second housing 220, two ends of the first rotating arm 340 are rotatably connected to the second side of the bearing plate 310 and the first housing 210, and two ends of the second rotating arm 350 are rotatably connected to the first side of the bearing plate 310 and the second housing 220.
In an embodiment, referring to fig. 5 and 6, the carrier plate 310 includes a mounting plate 311f connecting the first sidewall 311b and the second sidewall 311c, the extending direction of the mounting plate 311f is substantially parallel to the first end wall 311d and the second end wall 311e, two ends of the mounting plate 311f may be integrally formed with the bottom wall 311a, the first sidewall 311b and the second sidewall 311c, a first rotating shaft 312 is rotatably connected to one end of the mounting plate 311f near the first sidewall 311b, and a second rotating shaft 313 is rotatably connected to one end of the mounting plate 311f near the second sidewall 311 c. The third rotation shaft 314 and the fourth rotation shaft 315 are mounted on the mounting plate 311f, and the mounting plate 311f can support the first rotation shaft 312, the second rotation shaft 313, the third rotation shaft 314 and the fourth rotation shaft 315.
Further, referring to fig. 19, the first rotating arm 340 may include an extension section 341, a bending section 343, and a connection section 345 integrally formed, the bending section 343 being located between the extension section 341 and the connection section 345, the extension section 341 being connected to the first housing 210, the connection section 345 being connected to the second rotating shaft 313. The bottom wall 311a is provided with a groove 361 communicated with the accommodating groove 360, the cross-sectional curvature of the groove 361 is larger than that of the accommodating groove 360, and the cross-sectional curvature of the bending section 343 is approximately the same as that of the accommodating groove 360. In the unfolded state, the bending section 343 is accommodated in the groove 361. The above structure enables the folder type mobile terminal 10 to have a thinner thickness in the unfolded state. The second rotating arm 350 may have a structure similar to that of the first rotating arm 340, and in particular, as shown in fig. 15, the second rotating arm 350 may include an extension section 341, a bending section 343, and a connection section 345 integrally formed, the bending section 343 being located between the extension section 341 and the connection section 345, the extension section 341 of the second rotating arm 350 being connected with the second housing 220, the connection section 345 of the second rotating arm 350 being connected with the first rotating shaft 312. The bottom wall 311a is provided with a groove 361 communicated with the accommodating groove 360, the cross-sectional curvature of the groove 361 is larger than that of the accommodating groove 360, the cross-sectional curvature of the bending section 343 of the second rotating arm 350 is approximately the same as that of the accommodating groove 360, and in the unfolded state, the bending section 343 of the second rotating arm 350 is accommodated in the groove 361, so that the folding mobile terminal 10 has a thinner thickness in the unfolded state.
Referring to fig. 4 again, in an embodiment, the folding mechanism 300 includes a baffle 380, where the baffle 380 includes an integrally formed plate body 381 and two pins 383, one of the pins 383 passes through the carrier plate 310 and the first cover plate 320, the other pin 383 passes through the carrier plate 310 and the second cover plate 330, and the first cover plate 320 and the second cover plate 330 are respectively connected with the carrier plate 310 by the pins 383 in a rotating manner. Specifically, taking the baffle 380 connected to the first end wall 311d as an example in fig. 9 and 10, one pin 383 penetrates the first end wall 311d and the first cover plate 320, the other pin 383 penetrates the first end wall 311d and the second cover plate 330, and the first cover plate 320 and the second cover plate 330 are respectively connected with the first end wall 311d in a rotating manner through the pins 383. A baffle 380 may also be provided at the second end wall 311e, the structure and function of which are correspondingly identical to those of the baffle 380 at the first end wall 311d, and will not be described again. Further, referring to fig. 9 and 19, the first cover 320 and the second cover 330 may be correspondingly provided with a step structure 322, so that when the folding mobile terminal 10 is unfolded to a flat state, the step structure 322 of the first cover 320 and the step structure 322 of the second cover 330 can abut against the carrier 310, so as to limit the continuous rotation of the first housing 210 and the second housing 220. Further, referring to fig. 5 and 6, the carrier plate 310 may include two extension arms 311g, the two extension arms 311g being connected to the first end wall 311d and the second end wall 311e, respectively, specifically, one extension arm 311g may be integrally formed with the first end wall 311d, the other extension arm 311g may be integrally formed with the second end wall 311e, and when the baffle 380 is mounted on the first end wall 311d or the second end wall 311e, a side of the extension arm 311g facing the baffle 380 may be abutted with the baffle 380 to support the baffle 380.
Referring to fig. 4 and 10, the folding mechanism 300 includes a fixing plate 370 fixedly connected to the carrier plate 310, and the fixing plate 370 has a bar shape and covers a portion of the accommodating groove 360. Referring to fig. 19, the display screen 100 includes a display surface and a non-display surface disposed opposite to each other, and the fixing plate 370 abuts against the non-display surface of the display screen 100 in the unfolded state. Referring to fig. 14 and 15, in the closed state, a gap exists between the fixing plate 370 and the display screen 100. The above arrangement prevents the display 100 from being pressed by the fixing plate 370 in the folded state, thereby preventing the display 100 from being damaged. Of course, as can be seen from the foregoing, the cross section of the first rotating arm 340 may be in an elliptical arc shape, the cross section of the second rotating arm 350 may be in an elliptical arc shape, the structure of the first rotating arm 340 and the second rotating arm 350 may avoid squeezing the display 100 when in the folded state, and this arrangement may prevent the display 100 from being damaged in life due to improper squeezing.
Specifically, referring to fig. 16 and 17, a geometric model is built using the first rotating arm 340 as an example. Wherein, each parameter in the model is defined as follows:
O11 the center of rotation of the first shaft 312;
o21 the rotation center of the second rotation shaft 313;
O22 the center of rotation at the junction of the first rotating arm 340 and the first housing 210;
R is the radius of a track circle of O22 rotating around O21;
r, bending radius of the flexible screen;
A distance between a rotation center O11 of the first rotation shaft 312 and a rotation center O21 of the second rotation shaft 313;
m is the distance between the orthographic projection of the bending center of the flexible screen in the plane area of the flexible screen and the orthographic projection of O22 in the plane area in the folding state;
The flexible screen is flattened in the unfolded state, the track of O22 reaches the position O23, the non-display surface of the flexible screen is abutted with the upper surface of the fixed plate 370, and the distance L is equal to the distance between O23 and the upper surface of the fixed plate 370;
h, flattening the flexible screen in an unfolding state, wherein the track of O22 reaches the position O23, and the height between O23 and O11 is higher;
alpha is the included angle between two plane areas of the flexible screen in the folding state;
H, the height between O22 and O21 in the folding state;
theta is an included angle between the plane area of the flexible screen and the vertical direction in the folding state;
And d, horizontal distance between O23 and O11 in the unfolded state.
From the geometric relationship, θ=α/2;
obtained from Pythagorean theorem (D+d)2+h2＝R2 (1)
According to the length corresponding relation between the folding state and the unfolding state of the flexible screen, the following steps are known:
in the closed state, in order to make the gap between the flexible screen and the fixing plate 370 be equal to or greater than 0, the following geometric relationship should be satisfied:
H-h-L-(m cosθ+r+r sinθ)≥0 (3)
specifically, in the formula (3), the left side of the inequality corresponds to a gap between the flexible screen and the fixing plate 370, when the distance m between the orthographic projection of the bending center of the flexible screen in the plane area of the flexible screen and the orthographic projection of O22 in the plane area is projected to the vertical direction in the closed state, the corresponding length is m cos θ, and when the bending center of the flexible screen in the closed state is projected to the vertical direction, the vertical height between the orthographic projection of the bending center of the flexible screen in the plane area of the flexible screen and the bending center of the flexible screen is rsin θ.
As can be seen from the above equations (1), (2) and (3), in the design process of the folding mobile terminal 10, in order to flatten the flexible screen in the unfolded state, the gap between the flexible screen and the fixing plate 370 in the folded state is equal to or greater than 0, so as to prevent the flexible screen from being damaged in service life due to improper extrusion, and the following parameters should be satisfied: In the design process, the structure of each part can be designed according to the relational expression. It should be noted that, when the value of α is smaller, the two plane areas of the flexible screen are approximately parallel in the folded state, and the above relationship can be simplified as follows:
Further, referring to fig. 10, the edges of opposite sides of the fixing plate 370 are respectively opened with a first notch 371 and a second notch 373, and in the closed state, the first rotating arm 340 is inserted through the first notch 371, and the second rotating arm 350 is inserted through the second notch 373. The arrangement of the first notch 371 and the second notch 373 can provide a space for avoiding the rotation of the first rotating arm 340 and the second rotating arm 350, and can make the portion of the first rotating arm 340 protruding from the fixing plate 370 and the portion of the second rotating arm 350 protruding from the fixing plate 370 as close as possible in the folded state, thereby enabling the folding mobile terminal 10 to have a thinner thickness in the folded state.
Referring to fig. 11, the first housing 210 includes a first support plate 211 and a first connection plate 213 fixedly connected to the first support plate 211, and the first connection plate 213 is rotatably connected to the first rotating arm 340 and slidably connected to the first cover plate 320. The second housing 220 includes a second support plate 221 and a second connection plate 223 (refer to fig. 4) fixedly connected to the second support plate 221, and the second connection plate 223 is rotatably connected to the second rotation arm 350 and slidably connected to the second cover plate 330. Further, referring to fig. 9, 10 and 20, the first connecting plate 213 is provided with a first sliding groove 214, the first cover plate 320 is provided with a first guide rail 321, the first guide rail 321 is accommodated in the first sliding groove 214 and can slide in the first sliding groove 214, the first sliding groove 214 can limit and guide the sliding of the first guide rail 321, and in the process of rotating the first supporting plate 211, the first supporting plate 211 can drive the first cover plate 320 to rotate relative to the bearing plate 310 through the first connecting plate 213, and a rotation space is formed between the first connecting plate 213 and the first cover plate 320 for the first rotating arm 340 to rotate relative to the first connecting plate 213. Referring to fig. 20, the second connecting plate 223 is provided with a second sliding groove 224, the second cover plate 330 is provided with a second guide rail 331, the second guide rail 331 is accommodated in the second sliding groove 224 and can slide in the second sliding groove 224, the second sliding groove 224 can limit and guide the sliding of the second guide rail 331, and in the process of rotating the second supporting plate 221, the second supporting plate 221 can drive the second cover plate 330 to rotate relative to the bearing plate 310 through the second connecting plate 223, and a rotation space is formed between the second connecting plate 223 and the second cover plate 330 for the second rotating arm 350 to rotate relative to the second connecting plate 223.
Further, referring to fig. 4, the first connection plate 213 includes a first body 215 and a first boss 217 integrally formed with the first body 215. Referring to fig. 2, the second connection plate 223 includes a second body 225 and a second boss 227 integrally formed with the second body 225. Referring to fig. 2, in the unfolded state, the first boss 217 is embedded with the first notch 371, and the second boss 227 is embedded with the second notch 373. Further, referring to fig. 19, in the unfolded state, a side of the first body 215 facing the display screen 100 and a side of the second body 225 facing the display screen 100 are respectively flush with a side of the fixing plate 370 facing the display screen 100. The cooperation of the first boss 217 and the first notch 371, and the cooperation of the second boss 227 and the second notch 373 enable the bendable portion 110 of the display screen 100 and the planar area 120 connected with the bendable portion 110 to be continuously supported when the foldable mobile terminal 10 is in the unfolded state, so that the display screen 100 can be unfolded more smoothly, and the foldable mobile terminal is beneficial to users. For example, when the bendable portion 110 of the display screen 100 displays the interactive graphical interface, the user touches the portion of the area, which does not cause the recess of the display screen 100, and can protect the display screen 100 better.
Referring to fig. 20, in an embodiment, the first body 215 is provided with a first countersink 218, a portion of the structure of the first support plate 211 is accommodated in the first countersink 218, and a side of the first support plate 211 facing the display screen 100 is flush with a side of the first body 215 facing the display screen 100. Referring to fig. 4 and 20, the second body 225 is provided with a second countersink 228, and a part of the structure of the second support plate 221 is accommodated in the second countersink 228, and in combination with fig. 19, a side of the second support plate 221 facing the display screen 100 is flush with a side of the second body 225 facing the display screen 100. The arrangement of the first and second countersink 218, 228 facilitates assembly of the first support plate 211 with the first connection plate 213 and assembly of the second support plate 221 with the second connection plate 223. Since the side of the first support plate 211 facing the display screen 100 is flush with the side of the first body 215 facing the display screen 100, the side of the second support plate 221 facing the display screen 100 is flush with the side of the second body 225 facing the display screen 100, and the display screen 100 can be effectively supported in the unfolded state, and the display screen 100 can be unfolded more smoothly.
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 application, which are described in detail and are not to be construed as limiting the scope of the claims. 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 application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.