Locking mechanism, housing and electronic device

Abstract

The present invention provides a locking mechanism, which includes a first locking component, a first memory alloy component and a circuit board, the first locking component includes a first fixing component, a first locking component and a first reset component, the first locking component is movably connected to the first fixing component, the first locking component includes a first locking tongue, and the first reset component has an elastic force that drives the first locking component to move and reset relative to the first fixing component; the first memory alloy component includes a first memory alloy component and a first elastic component, the first memory alloy component is connected to the first elastic component; the end of the first memory alloy component away from the first elastic component is connected to the circuit board, and the end of the first elastic component away from the first memory alloy component is connected to the first locking component, wherein the circuit board controls the first memory alloy component to drive the first locking component to move relative to the first fixing component so that the first locking tongue extends or retracts from the first fixing component. The present invention also provides a housing provided with the locking mechanism and an electronic device provided with the housing.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a locking mechanism for locking, a housing provided with the locking mechanism, and an electronic equipment provided with the housing. Background Art

[0002] With the development and application of flexible screens, electronic devices with variable screen shapes have appeared in related technologies, such as foldable screen mobile phones, sliding screen mobile phones, etc. Taking the sliding screen mobile phone as an example, the sliding screen mobile phone includes two shells that are slidably connected to each other, and generally a motor is used to push the two shells away from each other or close to each other, so as to achieve the unfolding or sliding of the sliding screen. However, there is no locking mechanism between the two shells of the sliding screen mobile phone in the related technology. Therefore, the positioning effect of the sliding screen in the unfolded state is poor, and if the sliding screen mobile phone falls in a falling scene, the two shells quickly move close to each other under the action of external force, which is easy to damage the sliding screen or the internal mechanism of the sliding screen mobile phone. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a locking mechanism, which can automatically lock the mutual movement of the first shell and the second shell. The present invention also provides a shell provided with the above locking mechanism, and an electronic device provided with the above shell.

[0004] An embodiment of the present invention provides a locking mechanism, which includes a first locking component, a first memory alloy component and a circuit board, the first locking component includes a first fixing component, a first locking component, and a first resetting component arranged between the first fixing component and the first locking component, the first locking component is movably connected to the first fixing component, the first locking component includes a first locking tongue, and the first resetting component has an elastic force for driving the first locking component to move and reset relative to the first fixing component; the first memory alloy component includes a first memory alloy component and a first elastic component, the first memory alloy component is connected to the first elastic component; the end of the first memory alloy component away from the first elastic component is connected to the circuit board, and the end of the first elastic component away from the first memory alloy component is connected to the first locking component, wherein the circuit board controls the first memory alloy component to drive the first locking component to move relative to the first fixing component so that the first locking tongue extends or retracts to the first fixing component.

[0005] An embodiment of the present invention also provides a shell, which includes a locking mechanism, a first shell and a second shell, the first shell and the second shell are slidably connected to each other, the first fixing part of the locking mechanism is connected to the first shell, the second shell is provided with a first locking opening, and the first shell and the second shell have a locked state or an unlocked state. In the locked state, the first locking tongue of the locking mechanism is inserted into the first locking opening; in the unlocked state, the first locking tongue of the locking mechanism is disengaged from the first locking opening.

[0006] An embodiment of the present invention also provides an electronic device, which includes a shell and a power supply arranged in the shell, the power supply is electrically connected to the circuit board and the first memory alloy component, and the circuit board is used to control the power supply and the first memory alloy component to be powered on or off so as to shrink or reset the first memory alloy component.

[0007] The first memory alloy component of the locking mechanism of the electronic device of the present invention is connected to the circuit board and the first locking component at opposite ends, respectively. When the mainboard controls the power supply through the circuit board to energize the first memory alloy component, the first memory alloy component contracts due to heat to drive the first locking component to move along the first direction (i.e., the Y-axis direction), and the first reset component is compressed by the first locking component, so that the first locking tongue releases the positioning of the second shell and the first shell; when the mainboard controls the power supply through the circuit board to disconnect the power supply and the first memory alloy component, the first memory alloy component is reset, and the first reset component is elastically reset to push the first locking component to reset, so that the first locking tongue is positioned between the second shell and the first shell, thereby realizing the automatic locking between the first shell and the second shell of the electronic device, so that the positioning effect of the flexible screen in the unfolded state is better. If the electronic device does not come close to each other due to the mutual positioning of the second shell and the first shell in the falling scene, the internal mechanism of the flexible screen or the shell is prevented from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of an electronic device according to one embodiment of the present invention;

[0010] Figure 2 yes Figure 1 A schematic diagram of a three-dimensional structure of a housing assembly of an electronic device in an unfolded state;

[0011] Figure 3 yes Figure 2 A schematic diagram of a three-dimensional structure explosion of a shell assembly;

[0012] Figure 4 yes Figure 3 An enlarged view of the locking mechanism in FIG.

[0013] Figure 5 yes Figure 4 A schematic diagram of the three-dimensional structure of the locking mechanism in another perspective except for the circuit board;

[0014] Figure 6 yes Figure 4 A schematic diagram of a three-dimensional structure explosion of the locking mechanism;

[0015] Figure 7 yes Figure 6 A three-dimensional structure enlarged diagram of a part of the structure of the locking mechanism;

[0016] Figure 8 yes Figure 6 A three-dimensional structure enlarged view of another part of the locking mechanism;

[0017] Fig. 9 yes Figure 6 A three-dimensional cross-sectional view of the first fixing member in;

[0018] Fig.10 yes Figure 6 A three-dimensional cross-sectional view of the second fixing member in;

[0019] Fig.11 yes Figure 6 A three-dimensional cross-sectional view of the first connecting member in;

[0020] Fig.12 yes Figure 6 An enlarged schematic diagram of the three-dimensional structure of the first memory alloy wire;

[0021] Fig.13 yes Figure 6 An enlarged schematic diagram of the three-dimensional structure of the circuit board;

[0022] Fig.14 yes Figure 6 A schematic diagram of the three-dimensional structure of the positioning frame of the locking mechanism;

[0023] Fig.15 yes Fig.14 A schematic diagram of a three-dimensional structure of the positioning frame from another perspective;

[0024] Fig.16 yes Figure 6 A partial assembly diagram of the locking mechanism in FIG.

[0025] Fig.17 yes Fig.16 A schematic diagram of a three-dimensional structure of the locking mechanism from another perspective;

[0026] Fig.18 yes Fig.16 A front view of the locking mechanism in FIG.

[0027] Fig.19 yes Fig.16 An enlarged view of section XIX in FIG.

[0028] Fig. 20 yes Fig.17 An enlarged view of part XX in FIG.

[0029] Fig.21 yes Fig.18 An enlarged view of section XXI in FIG.

[0030] Fig. 22 yes Figure 6 A schematic diagram of the three-dimensional structural assembly of the locking mechanism;

[0031] Fig.23 yes Fig. 22 An enlarged view of section XXIII in FIG.

[0032] Fig.24 yes Figure 2 An enlarged view of section XXIV in FIG.

[0033] Fig.25 yes Figure 2 A schematic diagram of the three-dimensional structure of the shell assembly in the contracted state.

[0034] Main markings:

[0035] 100, electronic device; 20, housing; 21, locking mechanism; 23, first locking assembly; 231, first locking member; 2311, first locking tongue; 2313, first guide slide; 2315, first connecting portion; 2316, first connecting hole; 232, first fixing member; 2320, first guide groove; 2321, first outlet; 2323, first stop portion; 2324, first fixing strip; 2325, first fixing sheet; 2326, first mounting hole; 2328, first through hole; 234, first reset member; 25, first memory alloy assembly; 251, first memory alloy member; 2511, first memory alloy wire; 2513, first connecting hook; 253, first elastic member; 2531, first elastic body; 2 533, first connecting ring; 255, first connecting member; 2551, first connecting plate; 2553, first connecting column; 2554, first positioning column; 26, circuit board; 261, board body; 262, flexible circuit board; 263, first end; 265, second end; 27, second locking assembly; 271, second locking member; 2711, second locking tongue; 2713, second guide slide; 2715, second connecting portion; 2716, second connecting hole; 272, second fixing member; 2720, second guide groove; 2721, second outlet; 2723, second stop portion; 2724, second fixing strip; 2725, second fixing sheet; 2726, second mounting hole; 2728, second through hole; 274, second reset member; 28. Second memory alloy assembly; 281. Second memory alloy member; 2811. Second memory alloy wire; 2813. Second connecting hook; 283. Second elastic member; 2831. Second elastic body; 2833. Second connecting ring; 285. Second connecting member; 2851. Second connecting plate; 2853. Second connecting column; 2854. Second positioning column; 29. ​​Positioning frame; 291. Fixing portion; 2911. Fixing column; 2913. Support bar; 292. Support plate; 2922. Mounting hole; 2924. Positioning hole; 293. First receiving slot; 294. Second receiving slot; 295. First slide slot; 296. Second slide slot; 297. First receiving slot; 298. Second receiving slot; 22. First housing; 22 1. Top wall; 223. First end wall; 2230. Guide groove; 224. First side wall; 225. Connecting strip; 2251. First fixing hole; 2253. Second fixing hole; 2255. Stopper; 2256. Positioning hole; 2257. Positioning column; 227. First receiving space; 2210. Positioning groove; 2240. Connecting groove; 24. Second shell; 241. Bottom wall; 2411. First positioning strip; 2412. Second positioning strip; 2414. First locking opening; 2415. Second locking opening; 2416. Positioning strip; 243. Second end wall; 2430. Guide strip; 244. Second side wall; 246. Guide rail; 247. Second receiving space; 30. Motherboard; 40. Power supply; 50. Support device;60. Flexible screen; 62. Positioning area; 64. Sliding area; 70. Travel detection device; 80. Driving part. ; DETAILED DESCRIPTION

[0036] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that the reference to "embodiment" or "implementation method" in this document means that the specific features, structures or characteristics described in conjunction with the embodiment or implementation method may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The terms "first" and "second" appearing in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined. In the description of this application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", and "set on..." should be understood in a broad sense, for example, it can be a fixed connection, or it can be a detachable connection, or it can be connected in one piece; it can be a mechanical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Please also read Figure 1-Figure 6The electronic device 100 of one embodiment of the present invention can be applied to mobile phones, tablet computers, laptop computers, monitors, smart watches, portable multimedia players, mobile medical devices, etc. In this embodiment, a mobile phone is used as an example for specific description. The electronic device 100 in this embodiment includes a housing 20, a mainboard 30 arranged in the housing 20, a power supply 40, a supporting device 50, a flexible screen 60, a travel detection device 70 and a driving member 80; the housing 20 can be but is not limited to a telescopic housing or a folding housing, etc. In this embodiment, a telescopic housing is used as an example for specific description. Specifically, the shell 20 includes a locking mechanism 21, a first shell 22 and a second shell 24. The locking mechanism 21 is arranged between the first shell 22 and the second shell 24. The second shell 24 is slidably connected to the first shell 22, so that the first shell 22 and the second shell 24 can be contracted or expanded with each other; the main board 30 is electrically connected to the power supply 40, the flexible screen 60, the stroke detection device 70 and the driving member 80, and the power supply 40 is used to supply power to the main board 30, the flexible screen 60, the stroke detection device 70 and the driving member 80; the supporting device 50 is a hinge-like structure, one side of the supporting device 50 is connected to the first shell 22, and the supporting device 50 is wrapped around the second shell 20; the flexible screen 60 includes a positioning area 62 and a sliding area 64 located on one side of the positioning area 62, the positioning area 62 is fixed to the front side of the first shell 22, and the sliding area 64 is attached to the surface of the supporting device 50 facing away from the second shell 24. When the first shell 22 and the second shell 24 slide relative to each other, the support device 50 slides around the second shell 24, and the sliding area 64 slides around the second shell 24 with the support device 50. Specifically, when the mainboard 30 controls the driving member 80 to drive the second shell 24 to extend relative to the first shell 22 along the X-axis direction, that is, the second shell 24 moves relative to the first shell 22 along the X-axis direction and moves away from the first shell 22, the second shell 24 drives the support device 50 to slide relative to the second shell 24 and unfold, and the sliding area 64 unfolds synchronously with the support device 50, so that the display area of ​​the flexible screen 60 is increased; when the mainboard 30 controls the driving member 80 to drive the second shell 24 to contract relative to the first shell 22 along the X-axis direction, that is, the second shell 24 moves relative to the first shell 22 along the X-axis direction and approaches the first shell 22, the second shell 24 drives the support device 50 to slide relative to the second shell 24 and curls, and the sliding area 64 curls synchronously with the support device 50, so that the volume of the shell 20 is reduced. When the sliding area 64 is unfolded, the display surface of the flexible screen 60 can be enlarged, which is convenient for users to use; when the sliding area 64 is rolled up, the volume of the electronic device 100 can be reduced and convenient to carry. During the movement of the second housing 24 relative to the first housing 22, the mainboard 30 can control the locking mechanism 21 to automatically lock between the second housing 24 and the first housing 22 according to the travel detection device 70, so that the second housing 24 and the first housing 22 are positioned relative to each other.

[0040] like Figure 2-6As shown, the locking mechanism 21 includes a first locking component 23, a first memory alloy component 25 and a circuit board 26 electrically connected to the mainboard 30. The first locking component 23 includes a first locking member 231, a first fixing member 232, and a first reset member 234 arranged between the first locking member 231 and the first fixing member 232. The first locking member 231 is movably connected to the first fixing member 232. The first locking member 231 includes a first locking tongue 2311. The first reset member 234 has an elastic force that drives the first locking member 231 to move and reset relative to the first fixing member 232. The elastic force drives the first locking member 231 to move along the first direction (i.e., the Y-axis direction) so that the first locking tongue 2311 is positioned between the second shell 24 and the first shell 22, so that the second shell 24 and the first shell 22 are relative to each other. For positioning; the first memory alloy component 25 includes a first memory alloy component 251 and a first elastic component 253, the first memory alloy component 251 is connected to the first elastic component 253; the end of the first memory alloy component 251 away from the first elastic component 253 is connected to the circuit board 26, so that the first memory alloy component 251 is electrically connected to the circuit board 26, and the end of the first elastic component 253 away from the first memory alloy component 251 is connected to the first locking component 231, wherein the circuit board 26 is used to control the power supply 40 and the first memory alloy component 251 to be powered on or off, so as to control the first memory alloy component 251 to contract or reset, so as to drive the first locking component 231 to move relative to the first fixing component 232 along the first direction (i.e., the Y-axis direction), so that the first locking tongue 2311 extends out or contracts in the first fixing component 232. Specifically, the mainboard 30 controls the driving member 80 to drive the second housing 24 to move relative to the first housing 22 along the second direction (i.e., the X-axis direction), and the mainboard 30 controls the power supply 40 and the first memory alloy component 25 to be powered on or off through the circuit board 26, so that the first memory alloy component 251 contracts or resets to drive the first locking member 231 to move along the first direction (i.e., the Y-axis direction), so that the first locking tongue 2311 extends out of or contracts in the first fixing member 232. When the first locking tongue 2311 extends out of the first fixing member 232, the first locking tongue 2311 is positioned between the second housing 24 and the first housing 22 to prevent the second housing 24 from moving relative to the first housing 22; when the first locking tongue 2311 contracts in the first fixing member 232, the first locking tongue 2311 is separated from between the second housing 24 and the first housing 22, and the second housing 24 can move relative to the first housing 22.

[0041] In the present invention, the front side refers to the side facing the same direction as the light-emitting surface of the flexible screen 60, and the back side refers to the side facing the opposite direction to the light-emitting surface of the flexible screen 60; the Y-axis direction refers to the sliding direction of the first locking member 231 relative to the first fixing member 232, that is, the first direction is the Y-axis direction; the X-axis direction refers to the sliding direction of the second shell 24 relative to the first shell 22, and the second direction is the X-axis direction; the third direction refers to the direction that is perpendicular to both the first direction and the second direction, that is, the third direction is the Z-axis direction, which is the thickness direction of the electronic device 100.

[0042] The first memory alloy member 251 of the locking mechanism 21 of the present invention is connected to the circuit board 26 and the first locking member 231 at opposite ends respectively. When the mainboard 30 controls the power supply 40 through the circuit board 26 to energize the first memory alloy member 251, the first memory alloy member 251 contracts due to heat to drive the first locking member 231 to move along the first direction (i.e., the Y-axis direction), and the first reset member 234 is compressed by the first locking member 231, so that the first locking tongue 2311 releases the positioning of the second shell 24 and the first shell 22; when the mainboard 30 controls the power supply 40 and the first memory alloy member 251 through the circuit board 26 to cut off the power, the first memory alloy member 251 is reset, that is, the first memory alloy member 251 restores its original length, and the first reset member 234 is elastically reset and pushes the first locking member 231 to reset, so that the first locking tongue 2311 is positioned between the second shell 24 and the first shell 22, thereby realizing the automatic locking between the second shell 24 and the first shell 22 of the electronic device 100, so that the positioning effect of the flexible screen 60 in the unfolded state is better. If the electronic device 100 falls, the second shell 24 and the first shell 22 will not come close to each other due to their relative positioning, thereby preventing the flexible screen 60 or the internal structure of the shell 20 from being damaged.

[0043] In this embodiment, the locking mechanism 21 further includes a second locking assembly 27 and a second memory alloy assembly 28. The second locking assembly 27 includes a second locking member 271, a second fixing member 272, and a second reset member 274 disposed between the second fixing member 272 and the second locking member 271. The second locking member 271 is movably connected to the second fixing member 272. The second locking member 271 includes a second locking tongue 2711. The second reset member 274 has an elastic force that drives the second locking member 271 to move and reset relative to the second fixing member 272. The elastic force drives the second locking member 271 to move so that the second locking tongue 2711 is positioned between the second housing 24 and the first housing 22, so that The second shell 24 is positioned relative to the first shell 22; the second memory alloy assembly 28 includes a second memory alloy component 281 and a second elastic component 283 connected to the second locking component 271, the second memory alloy component 281 is connected to the second elastic component 283, the end of the second memory alloy component 281 away from the second elastic component 283 is connected to the circuit board 26, the second memory alloy component 281 is electrically connected to the circuit board 26, the main board 30 controls the second memory alloy component 281 through the circuit board 26 to drive the second locking component 271 to move relative to the second fixing component 272 along the first direction (i.e., the Y-axis direction), so that the second locking tongue 2711 extends out or retracts from the second fixing component 272. The first memory alloy component 251 is connected between the first locking component 231 and the circuit board 26, and the second memory alloy component 281 is connected between the second locking component 271 and the circuit board 26. The first memory alloy component 251 and the second memory alloy component 281 are electrically connected to the circuit board 26 respectively. The circuit board 26 can control the first memory alloy component 251 and the second memory alloy component 281 to drive the first locking component 231 relative to the first fixing component 232 and the second locking component 271 relative to the second fixing component 272 to move respectively, so that the first locking tongue 2311 extends or retracts to the first fixing component 232 and the second locking tongue 271 extends or retracts to the second fixing component 272. The first locking tongue 2311 and the second locking tongue 2711 extend or retract to the second fixing component 272. The two locking tongues 2711 can move synchronously or asynchronously; the second shell 24 can move along the second direction (i.e., the X-axis direction) relative to the first shell 22, and the mainboard 30 controls the power supply 40 and the first memory alloy component 251 and the second memory alloy component 281 to be powered on or off through the circuit board 26, so that the first memory alloy component 251 contracts or resets to drive the first locking component 231 to move along the first direction (i.e., the Y-axis direction) and the second memory alloy component 281 contracts or resets to drive the second locking component 271 to move along the first direction (i.e., the Y-axis direction), so that the first locking tongue 2311 extends or contracts to the first fixing component 232 and the second locking tongue 2711 extends or contracts to the second fixing component 272.When the first lock tongue 2311 and the second lock tongue 2711 extend out of the first fixing member 232 and the second fixing member 272 respectively, the first lock tongue 2311 and the second lock tongue 2711 are positioned between the second shell 24 and the first shell 22 to prevent the second shell 24 from moving relative to the first shell 22; when the first lock tongue 2311 and the second lock tongue 2711 are retracted to the first fixing member 232 and the second fixing member 272 respectively, the first lock tongue 2311 and the second lock tongue 2711 are disengaged from between the second shell 24 and the first shell 22, and the second shell 24 can move relative to the first shell 22.

[0044] like Figure 1-Figure 2 As shown, the first housing 22 includes a top wall 221, two first end walls 223 respectively arranged at opposite ends of the top wall 221, a first side wall 224 arranged at one side of the top wall 221, and a connecting strip 225 arranged at a side of the top wall 221 away from the first side wall 224. The top wall 221, the two first end walls 223 and the first side wall 224 enclose a first receiving space 227; the first receiving space 227 is used to receive components such as the second housing 24, the mainboard 30 and the power supply 40. A positioning groove 2210 is provided on the front of the first housing 22, and the positioning area 62 of the flexible screen 60 is received and positioned in the positioning groove 2210. A connecting groove 2240 is provided near the top wall 221 on the first side wall 224, and the connecting groove 2240 is connected to the positioning groove 2210. The opposite ends of the connecting groove 2240 extend along the Y-axis direction to the positions near the two first end walls 223, and the connecting groove 2240 is used to position the side of the flexible screen 60. The first shell 22 has two opposite ends with guide grooves 2230, which extend along the X-axis direction to the first side wall 224. The second shell 24 is slidably connected to the guide grooves 2230. Specifically, guide grooves 2230 are respectively provided between the two opposite ends of the top wall 221 and the two first end walls 223. The connecting strip 225 has two opposite ends extending along the Y-axis direction to the two first end walls 223. The first fixing member 232 and the second fixing member 272 are respectively connected to the two opposite ends of the connecting strip 225, so that the first fixing member 232 is close to one of the first end walls 223, and the second fixing member 272 is close to the other first end wall 223. Specifically, the connecting strip 225 has two opposite ends on the side away from the first side wall 224, which has a first fixing portion and a second fixing portion, that is, the first fixing portion is close to one of the first end walls 223 and the second fixing portion is close to the other first end wall 223. The first fixing portion has a first fixing hole 2251, and the second fixing portion has a second fixing hole 2253. A stopper 2255 is respectively provided between the two opposite ends of the connecting strip 225 and the two first end walls 223. The connecting strip 225 is respectively provided with positioning holes 2256 near the first fixing hole 2251 and the second fixing member 2253; the connecting strip 225 is respectively provided with positioning posts 2257 near the two positioning holes 2256. Preferably, the outer side surface of the first side wall 224 is set as an arc surface.

[0045] The second shell 24 includes a bottom wall 241, two second end walls 243 respectively arranged at opposite ends of the bottom wall 241, and a second side wall 244 arranged at one side of the bottom wall 241; the bottom wall 241, the second side wall 244 and the two second end walls 243 enclose a second receiving space 247. The outer side surface of the second side wall 244 is set as an arc surface, that is, the outer side surface of the second side wall 244 facing away from the first shell 22 is set as an arc surface, so as to facilitate the sliding and rolling of the support device 50 around the second shell 24. Preferably, a plurality of convex strips are arranged on the outer side surface of the second side wall 244, and the plurality of convex strips are arranged at intervals along the Y-axis direction. The plurality of convex strips can reduce the contact area between the support device 50 and the second shell 24, which is conducive to the sliding and rolling of the support device 50 around the second shell 24. The second shell 24 has two opposite ends with guide bars 2430 extending along the X-axis direction to near the second side wall 244 . The two guide bars 2430 can be slidably accommodated in the two guide grooves 2230 of the first shell 22 , so that the second shell 24 is slidably connected to the first shell 22 along the X-axis direction.

[0046] The second shell 24 is provided with a first locking opening 2414 and a second locking opening 2415. The first fixing member 23 and the second fixing member 27 of the locking mechanism 21 are fixedly connected to the first shell 22. There is a locked state or an unlocked state between the first shell 22 and the second shell 24. Specifically, when the first locking tongue 2311 of the first locking member 231 and the second locking tongue 2711 of the second locking member 271 are respectively inserted into the first locking opening 2414 and the second locking opening 2415, the second shell 24 and the first shell 22 are in a locked state, and the locked state means that the second shell 24 cannot move relative to the first shell 22. When the first locking tongue 2311 of the first locking member 231 and the second locking tongue 2711 of the second locking member 271 are respectively disengaged from the first locking opening 2414 and the second locking opening 2415, the second shell 24 and the first shell 22 are in an unlocked state. The unlocked state means that the second shell 24 can move relative to the first shell 22 along the X-axis direction. In this embodiment, the bottom wall 241 is provided with a first positioning bar 2411 and a second positioning bar 2412 at opposite ends of the side surface facing the second receiving space 247, the first positioning bar 2411 extends along the X-axis direction, the second positioning bar 2412 extends along the X-axis direction, the first positioning bar 2411 is provided with a plurality of first locking openings 2414 along the second direction (X-axis direction), the second positioning bar 2412 is provided with a plurality of second locking openings 2415 along the second direction (X-axis direction), the first locking member 231 can be selectively inserted into one of the plurality of first locking openings 2414, and the second locking member 271 can be selectively inserted into one of the plurality of second locking openings 2415. Specifically, a first positioning bar 2411 is provided with a plurality of first mounting grooves on one side facing the second positioning bar 2412, the plurality of first mounting grooves are arranged along the X-axis direction, a positioning bar 2416 is connected in each first mounting groove, and each positioning bar 2416 and the first positioning bar 2411 form a first locking opening 2414; a second positioning bar 2412 is provided with a plurality of second mounting grooves on one side facing the first positioning bar 2411, the plurality of second mounting grooves are arranged along the X-axis direction, a positioning bar 2416 is connected in the second mounting groove, and each positioning bar 2416 and the second positioning bar 2412 form a second locking opening 2415. The positioning bar 2416 and the first positioning bar 2411 may be connected by, but not limited to, snap-fitting, screwing, or gluing, and the positioning bar 2416 and the second positioning bar 2412 may be connected by, but not limited to, snap-fitting, screwing, or gluing. The second side wall 244 is provided with stop grooves 2443 at opposite ends of the side facing the second receiving space 247, and the two stop parts 2255 of the first shell 22 are respectively abutted against the two stop grooves 2443 of the second shell 24 to prevent the second shell 24 from further approaching the first shell 22. Preferably, the outer side surface of the second side wall 244 is set as an arc surface, and the end surface of the second end wall 243 close to the second side wall 244 is provided with an arc surface to facilitate the sliding and rolling of the support device 50 around the second shell 24.

[0047] The first housing 22 and the second housing 24 are slidably connected by the cooperation of the guide rail 246 and the guide slide groove. The guide rail 246 is provided in one of the first housing 22 and the second housing 24, and the guide slide groove is provided in the other of the first housing 22 and the second housing 24. In this embodiment, the first receiving space 227 of the first housing 22 is provided with the guide rail 246, and the guide rail 246 extends along the X-axis direction; the second receiving space 247 of the second housing 24 is provided with the guide slide groove, and the guide slide groove extends along the X-axis direction. When the first housing 22 and the second housing 24 are assembled in cooperation, the guide rail 246 is slidably connected to the guide slide groove.

[0048] In some embodiments, the second shell 24 and the first shell 22 are slidably connected through the cooperation of a rack and a gear, the rack extends along the X-axis direction, the gear is engaged with the rack, the rack is provided in one of the second shell 24 and the first shell 22, and the gear is provided in the other of the second shell 24 and the first shell 22, and the driving member 80 drives the gear to rotate so that the second shell 24 moves relative to the first shell 22 and moves closer to or away from each other.

[0049] like Figure 2-Figure 9As shown, the first memory alloy component 25 also includes a first connecting member 255, one end of the first elastic member 253 away from the first locking member 231 is connected to the first connecting member 255, and the first memory alloy member 251 includes a first memory alloy wire 2511, which is hung on the first connecting member 255, and the end of the first memory alloy wire 2511 away from the first connecting member 255 is connected to the circuit board 26; the second memory alloy component 28 also includes a second connecting member 285, one end of the second elastic member 283 away from the second locking member 271 is connected to the second connecting member 285, and the second memory alloy member 281 includes a second memory alloy wire 2811, which is hung on the second connecting member 285, and the end of the second memory alloy wire 2811 away from the second connecting member 285 is connected to the circuit board 26. When the first memory alloy wire 2511 contracts or resets, the first locking member 231 moves relative to the first fixing member 232, so that the first lock tongue 2311 contracts or extends from the first fixing member 232; when the second memory alloy wire 2811 contracts or resets, the second locking member 271 moves relative to the second fixing member 272, so that the second lock tongue 2711 contracts or extends from the second fixing member 272. Specifically, when the first memory alloy wire 2511 is energized with the power source, the first memory alloy wire 2511 contracts to drive the first locking member 231 to move relative to the first fixing member 232, so that the first locking tongue 2311 is disengaged from the first locking opening 2414, and the first resetting member 234 is compressed by the first locking member 231; when the second memory alloy wire 2811 is energized with the power source, the second memory alloy wire 2811 moves relative to the second fixing member 272, so that the second locking tongue 2711 is disengaged from the second locking opening 2415, and the second resetting member 274 is compressed by the second locking member 271. At this time, the second housing 24 can move relative to the first housing 22 along the X-axis direction; when the first memory alloy wire 2511 is energized with the power source, the second memory alloy wire 2811 moves relative to the second fixing member 272, so that the second locking tongue 2711 is disengaged from the second locking opening 2415, and the second resetting member 274 is compressed by the second locking member 271. At this time, the second housing 24 can move relative to the first housing 22 along the X-axis direction; 11 is disconnected from the power supply, the first memory alloy wire 2511 restores its original length, and the first reset member 234 elastically resets and pushes the first locking member 231 to move relative to the first fixing member 232, so that the first locking tongue 2311 is inserted into the first locking opening 2414; when the second memory alloy wire 2811 is disconnected from the power supply, the second memory alloy wire 2811 restores its original length, and the second reset member 274 elastically resets and pushes the second locking member 271 to move relative to the second fixing member 272, so that the second locking tongue 2711 is inserted into the second locking opening 2415. At this time, the second shell 24 cannot move relative to the first shell 22, that is, the second shell 24 cannot move relative to the first shell 22 along the X-axis direction.

[0050] Preferably, the first memory alloy wire 2511 and the second memory alloy wire 2811 are energized at the same time as the power supply, and the first memory alloy wire 2511 and the second memory alloy wire 2811 are contracted at the same time to drive the first locking tongue 2311 and the second locking tongue 2711 to contract synchronously with the first fixing member 232 and the second fixing member 272, respectively, so that the first locking tongue 2311 and the second locking tongue 2711 are separated from the first locking opening 2414 and the second locking opening 2415, respectively, and the second housing 24 can be relative to the first housing 22 along the X-axis direction. Movement; when the first memory alloy wire 2511 and the second memory alloy wire 281 are powered off at the same time, the first memory alloy wire 2511 and the second memory alloy wire 2811 synchronously restore their original lengths, so that the first locking tongue 2311 and the second locking tongue 2711 are synchronously extended out of the first fixing member 232 and the second fixing member 272 respectively, so that the first locking tongue 2311 and the second locking tongue 2711 are respectively inserted into the first locking port 2414 and the second locking port 2415, and the second shell 24 cannot move relative to the first shell 22.

[0051] The displacement of the first locking member 231 relative to the first fixing member 232 when sliding along the first direction (i.e., the Y-axis direction) is greater than or equal to the contraction of the first memory alloy wire 2511 in the first direction (i.e., the Y-axis direction), and the displacement of the second locking member 271 relative to the second fixing member 272 when sliding along the first direction is slightly greater than or equal to the contraction of the second memory alloy wire 2711 in the first direction (i.e., the Y-axis direction). The opposite ends of the first elastic member 253 are respectively connected between the first locking member 231 and the first memory alloy wire 2511, and the opposite ends of the second elastic member 283 are respectively connected between the second locking member 271 and the second memory alloy wire 2811. When the power source 40 energizes the first memory alloy wire 2511 and the second memory alloy wire 2811 respectively, the contraction of the first memory alloy wire 2511 generates a contraction force acting on the first elastic member 253, and then the first elastic member 253 drives the first locking member 231 to move, and the contraction of the second memory alloy wire 2811 generates a contraction force acting on the second elastic member 283, and then the second elastic member 283 drives the second locking member 271 to move; because the first elastic member 234 and the second elastic member 274 have a buffering effect, it can prevent If the first memory alloy wire 2511 is damaged or broken, even if the first locking tongue 2311 is stuck in the first locking port 2414 and cannot be separated from the first locking port 2414, when the power supply 40 energizes the first memory alloy wire 2511, the first memory alloy wire 2511 contracts to drive the first elastic member 253 to elastically deform, thereby playing a buffering role, thereby preventing the first memory alloy wire 2511 from being damaged or broken; when the second locking tongue 2711 is stuck in the second locking port 2415 and cannot be separated from the second locking port 2415, when the power supply 40 energizes the second memory alloy wire 2811, the second memory alloy wire 2811 contracts to drive the second elastic member 283 to elastically deform, thereby playing a buffering role, thereby preventing the second memory alloy wire 2811 from being damaged or broken.

[0052] The first locking member 231 also includes a first guide slide 2313 slidably connected to the first fixing member 232, one end of the first guide slide 2313 is connected to the first locking tongue 2311, and the other end of the first guide slide 2313 is connected to the first elastic member 253, and the first resetting member 234 is sleeved on the first guide slide 2313, and the first resetting member 234 respectively presses against the first locking tongue 2311 and the first fixing member 232 at opposite ends, so that the first locking tongue 2311 moves and resets relative to the first fixing member 232; the second locking member 271 also includes a second guide slide 2713 slidably connected to the second fixing member 272, one end of the second guide slide 2713 is connected to the second locking tongue 2711, and the second resetting member 274 is sleeved on the second guide slide 2713, and the second resetting member 274 respectively presses against the second locking tongue 2711 and the second fixing member 272 at opposite ends, so that the second locking tongue 2711 moves and resets relative to the second fixing member 272. In this embodiment, the first guide slide 2313 is a cylinder, the first guide slide 2313 extends along the Y-axis direction, one end of the first guide slide 2313 is connected to the middle of one end surface of the first lock tongue 2311, and the area of ​​the first guide slide 2313 on the XZ load surface is smaller than the area of ​​the first lock tongue 2311 on the XZ cross section; the second guide slide 2713 is a cylinder, the second guide slide 2713 extends along the Y-axis direction, one end of the second guide slide 2713 is connected to the middle of one end surface of the second lock tongue 2711, and the area of ​​the second guide slide 2713 on the XZ cross section is smaller than the area of ​​the second lock tongue 2711 on the XZ cross section.

[0053] The first locking member 231 also includes a first connecting portion 2315 connected to one end of the first guide slide 2313 away from the first locking tongue 2311, and the first connecting portion 2315 can be extended out of the first fixing member 232 and then connected to the first elastic member 253; the second locking member 271 also includes a second connecting portion 2715 connected to one end of the second guide slide 2713 away from the second locking tongue 2711, and the second connecting portion 2715 is extended out of the second fixing member 272 and then connected to the second elastic member 283. The first connecting portion 2315 and the first elastic member 253 can be connected by means of, but not limited to, screw connection, clamping connection or welding, and the second connecting portion 2715 and the second elastic member 283 can be connected by means of, but not limited to, screw connection, clamping connection or welding. In this embodiment, the first connection portion 2315 is a first connection block protruding from the end surface of the first guide slide 2313 away from the first locking tongue 2311, the first connection portion 2315 is provided with a first connection hole 2316, the first connection hole 2316 passes through the first connection portion 2315 along the X-axis direction, and the first locking member 231 is connected to the first elastic member 253 through the first connection hole 2316; the second connection portion 2715 is a second connection block protruding from the end surface of the second guide slide 2713 away from the second locking tongue 2711, the second connection portion 2715 is provided with a second connection hole 2716, the second connection hole 2716 passes through the second connection block along the X-axis direction, and the second locking member 271 is connected to the second elastic member 283 through the second connection hole 2716. Specifically, the first connection hole 2316 extends along the X-axis direction and passes through the first connection portion 2315, and the second connection hole 2716 extends along the X-axis direction and passes through the second connection portion 2715.

[0054] like Figure 3 , Figure 6-Figure 10As shown, the first fixing member 232 is provided with a first guide groove 2320 along the first direction (i.e., the Y-axis direction), the first guide groove 2320 penetrates the end surface of the first fixing member 232 away from the first memory alloy wire 2511 to form a first outlet 2321, the first locking member 231 is slidably accommodated in the first guide groove 2320, and the first locking tongue 2311 extends out or retracts at the first outlet 2321 under the drive of the first memory alloy wire 2511; the second fixing member 272 is provided with a second guide groove 2720 along the first direction (i.e., the Y-axis direction), the second guide groove 2720 penetrates the end surface of the second fixing member 272 away from the second memory alloy wire 2811 to form a second outlet 2721, the second locking member 271 is slidably accommodated in the second guide groove 2720, and the second locking tongue 2711 extends out or retracts at the second outlet 2721 under the drive of the second memory alloy wire 2811. Specifically, the first fixing member 232 includes a first fixing bar 2324 and a first fixing sheet 2325 provided on the outer wall of the first fixing bar 2324. The first guide groove 2320 is provided on one end surface of the first fixing bar 2324 and extends along the Y-axis direction to the other end surface opposite to the first fixing bar 2324. The first fixing sheet 2325 can be connected to the connecting bar 225 of the first shell 22 by, but not limited to, snap connection, screw connection, adhesive connection or welding. In this embodiment, the opposite ends of the outer peripheral wall of the first fixing bar 2324 are respectively A first fixing plate 2325 is provided, and each first fixing plate 2325 is provided with a first mounting hole 2326, and the first mounting hole 2326 is used to connect the first fixing member 232 to the first fixing hole 2251 of the connecting strip 225; further, the first fixing plate 2325 and the connecting strip 225 can also be fixedly connected by the cooperation of a clamping hole and a clamping column, and the clamping hole is opened in one of the first fixing plate 2325 and the connecting strip 225, and the clamping column is set in the other of the first fixing plate 2325 and the connecting strip 225. The second fixing member 272 includes a second fixing bar 2724 and a second fixing sheet 2725 provided on the outer wall of the second fixing bar 2724. The second guide groove 2720 is provided on one end surface of the second fixing bar 2724 and extends along the Y-axis direction to the other end surface opposite to the second fixing bar 2724. The second fixing sheet 2725 can be connected to the connecting bar 225 of the first shell 22 by, but not limited to, snap connection, screw connection, adhesive connection or welding. In this embodiment, the outer peripheral wall of the second fixing bar 2724 is provided with a second fixing sheet 2725. The second fixing sheet 272 The second fixing piece 2725 extends from one end of the second fixing strip 2727 to the other opposite end. The second fixing piece 2725 is provided with a second mounting hole 2726, and the second mounting hole 2726 is used to connect the second fixing member 272 to the second fixing hole 2253 of the connecting strip 225. Furthermore, the second fixing piece 2725 and the connecting strip 225 can also be fixedly connected by the cooperation of a clamping hole and a clamping column. The clamping hole is provided in one of the second fixing piece 2725 and the connecting strip 225, and the clamping column is provided in the other of the second fixing piece 2725 and the connecting strip 225.The first through hole 2328 communicating with the first guide groove 2320 is provided at one end of the first fixing member 232 away from the first outlet 2321. The diameter of the first guide bar 2313 is less than or equal to the inner diameter of the first through hole 2328. The first guide bar 2313 is slidably provided in the first through hole 2328, that is, the first guide bar 2313 is slidably provided in the first through hole 2328 along the first direction (i.e., the Y-axis direction). Specifically, the first through hole 2328 is provided in the middle of the end surface of the first fixing member 232 away from the first outlet 2321, and the first through hole 2328 extends along the Y-axis direction and communicates with the first guide groove 2320. A second through hole 2728 connected to the second guide groove 2720 is provided at one end of the second fixing member 272 away from the second outlet 2721, and the diameter of the second guide slide 2713 is less than or equal to the inner diameter of the second through hole 2728. The second guide slide 2713 can be slidably penetrated in the second through hole 2728, that is, the second guide slide 2713 is slidably penetrated in the second through hole 2728 along the first direction (that is, the Y-axis direction); specifically, the second through hole 2728 is provided in the middle of the end surface of the second fixing member 272 away from the second outlet 2721, and the second through hole 2728 extends along the Y-axis direction and is connected to the second guide groove 2720.

[0055] like Figure 8-Figure 10As shown, the first guide groove 2320 may be, but not limited to, a rectangular groove, a circular groove, or a polygonal groove, etc., and the first locking tongue 2311 corresponding to the first guide groove 2320 may be, but not limited to, a rectangular block, a circular column, or a polygonal block, etc.; the second guide groove 2720 may be, but not limited to, a rectangular groove, a circular groove, or a polygonal groove, etc., and the second locking tongue 2711 corresponding to the second guide groove 2720 may be, but not limited to, a rectangular block, a circular column, or a polygonal block, etc. In this embodiment, the first guide groove 2320 is a rectangular groove extending along the Y-axis direction, and the first locking tongue 2311 is a rectangular block; the second guide groove 2720 is a rectangular groove extending along the Y-axis direction, and the second locking tongue 2711 is a rectangular block. Preferably, the first fixing member 232 is provided with a first stop portion 2323 on the inner wall of the first guide groove 2320, and the first stop portion 2323 is used to stop the first locking member 231 from moving toward one end close to the first memory alloy wire 2511; the second fixing member 272 is provided with a second stop portion 2723 on the inner wall of the second guide groove 2720, and the second stop portion 2723 is used to stop the second locking member 271 from moving toward one end close to the second memory alloy wire 2811. In this embodiment, the first stop portion 2323 is a first stop bar disposed on the inner wall of the first guide groove 2320 at one end close to the first through hole 2328, and the first locking tongue 2311 can slide along the Y-axis direction at one end of the first guide groove 2320 away from the first through hole 2328 until the end surface of the first locking tongue 2311 close to the first guide slide bar 2313 stops at the first stop portion 2323 (i.e., the first stop bar) to prevent the first locking tongue 2311 from continuing to slide toward the end close to the first through hole 2328. At this time, the first locking tongue 2311 is completely accommodated in the first fixing bar 232 4; the second stop portion 2723 is provided on the inner wall of the second guide groove 2720, and a second stop strip is provided on one end thereof close to the second through hole 2728. The second locking tongue 2711 can slide along the Y-axis direction at one end of the second guide groove 2720 away from the second through hole 2728 until the end surface of the second locking tongue 2711 close to the second guide slide strip 2713 stops at the second stop portion 2723 (i.e., the second stop strip) to prevent the second locking tongue 2711 from continuing to slide toward the end close to the second through hole 2728. At this time, the second locking tongue 2711 is completely accommodated in the second fixing strip 2724.

[0056] like Figure 6-Figure 8 and Fig.11As shown, the first connecting member 255 includes a first connecting plate 2551, a first connecting column 2553 and a first positioning column 2554 provided on the first connecting plate 2551, a first memory alloy wire 2551 is hung on the first connecting column 2553, and an end of the first elastic member 253 away from the first locking member 231 is positioned on the first positioning column 2554; preferably, the first connecting column 2553 and the first positioning column 2554 are both cylindrical, the first connecting column 2553 and the first positioning column 2554 are spaced and parallel, and the axis of the first connecting column 2553 and the axis of the first positioning column 2554 are both parallel to the X axis. The second connecting member 285 includes a second connecting plate 2851, a second connecting column 2853 and a second positioning column 2854 provided on the second connecting plate 2851, a second memory alloy wire 2811 is hung on the second connecting column 2583, and an end of the second elastic member 283 away from the second locking member 271 is positioned on the second connecting column 2854. Preferably, the second connecting column 2853 and the second positioning column 2854 are both cylinders, the second connecting column 2853 and the second positioning column 2854 are spaced and parallel, and the axis line of the second connecting column 2853 and the axis line of the second positioning column 2854 are both parallel to the X-axis. In this embodiment, the first connecting member 255 includes two first connecting plates 2551 spaced in parallel, the two first connecting plates 2551 form a first interval 2556, and the first connecting column 2553 and the first positioning column 2554 are respectively connected between the two first connecting plates 2551; preferably, the first connecting column 2553 is located at one end close to the first memory alloy member 251, and the first positioning column 2554 is located at one end close to the first elastic member 253; the second connecting member 285 includes two second connecting plates 2851 spaced in parallel, the two second connecting plates 2851 form a second interval 2856, and the second connecting column 2853 and the second positioning column 2854 are respectively connected between the two second connecting plates 2851; preferably, the second connecting column 2853 is located at one end close to the second memory alloy member 281, and the second positioning column 2854 is located at one end close to the second elastic member 283. In other embodiments, the first connecting column 2553 and the first positioning column 2554 can also be but not limited to rectangular columns, polygonal columns, elliptical columns, etc.; the second connecting column 2853 and the second positioning column 2854 can also be but not limited to rectangular columns, polygonal columns, elliptical columns, etc.

[0057] The first memory alloy component 251 further includes a first connection hook 2513 connected to the end of the first memory alloy wire 2511, the first connection hook 2513 is connected to the circuit board 26, and the first memory alloy wire 2511 is electrically connected to the circuit board 26 through the first connection hook 2513; the second memory alloy component 28 further includes a second connection hook 2813 connected to the end of the second memory alloy wire 2811, the second connection hook 2813 is connected to the circuit board 26, and the second memory alloy wire 2811 is electrically connected to the circuit board 26 through the second connection hook 2813. In this embodiment, the first memory alloy wire 2511 is connected to the first connection hook 2513 at both ends, the first memory alloy wire 2511 is passed through the first interval 2556 of the first connecting member 255 and is hung on the first connecting column 2553; the second memory alloy wire 2811 is connected to the second connection hook 2813 at both ends, the second memory alloy wire 2811 is passed through the second interval 2856 of the second connecting member 285 and is hung on the second connecting column 2853.

[0058] In other embodiments, the first memory alloy component 251 only includes a first connecting hook 2513 and a first memory alloy wire 2511, one end of the first memory alloy wire 2511 is connected to the first connecting hook 2513, the other end of the first memory alloy wire 2511 is connected to the first connecting hook 2513, and the first connecting hook 2513 is connected to the circuit board 26; the second memory alloy component 281 only includes a second connecting hook 2813 and a second memory alloy wire 2811, one end of the second memory alloy wire 2811 is connected to the second connecting hook 2813, the other end of the second memory alloy wire 2811 is connected to the second connecting hook 2813, and the second connecting hook 2813 is connected to the circuit board 26.

[0059] like Figure 7-Figure 8 As shown, the first elastic member 253 includes a first elastic body 2531 and two first connecting rings 2533 connected to opposite ends of the first elastic body 2531, and the two first connecting rings 2533 are respectively connected to the first connecting portion 2315 and the first positioning column 2554 of the first connecting member 255; the second elastic member 283 includes a second elastic body 2831 and two second connecting rings 2833 connected to opposite ends of the second elastic body 2831, and the two second connecting rings 2833 are respectively connected to the second connecting portion 2715 and the second positioning column 2854 of the second connecting member 285. The first elastic member 253 and the second elastic member 283 can be, but are not limited to, springs, rubber strips, or elastic plastic strips. In this embodiment, the first elastic member 253 and the second elastic member 283 are both tension springs.

[0060] like Figure 6 and Fig.13As shown, the circuit board 26 includes a rectangular plate body 261 and a flexible circuit board 262 connected to the plate body 261. The plate body 261 includes a first end 263 and a second end 265 opposite to each other. The first end 263 is close to the second locking assembly 27, and the second end 265 is close to the first locking assembly 23. The first connecting hook 2513 is clamped on the second end 265, and the second connecting hook 2813 is clamped on the first end 263. The first memory alloy wire 251 and the second memory alloy wire 281 are spaced apart from each other. The first conductive sheet 2611 and the second conductive sheet 2613 are respectively disposed at opposite ends of one side of the plate body 261. The first conductive sheet 2611 is used to electrically connect the first connecting hook 2513, and the second conductive sheet 2613 is used to electrically connect the second connecting hook 2813. The flexible circuit board 262 is used to electrically connect the main board. The circuit board 26 is provided with a fixing hole 2615.

[0061] like Figure 6 and Figure 14-15 The locking mechanism 21 further includes a bar-shaped positioning frame 29, the positioning frame 29 includes a fixing portion 291 disposed in the middle thereof, the circuit board 261 is fixedly connected to the fixing portion 291, and the first locking assembly 23 and the second locking assembly 27 are respectively disposed at opposite ends of the positioning frame 29. Specifically, the positioning frame 29 further includes a rectangular support plate 292, the fixing portion 291 includes a fixing column 2911 disposed in the middle of the side of the support plate 292 facing the circuit board 26, the fixing holes 2615 on the circuit board 26 correspond to the fixing columns 2911 of the positioning frame 29, and the fixing columns 2911 are detachably connected to the fixing holes 2615. In this embodiment, four fixing columns 2911 are disposed on the support plate 292, and the circuit board 26 is disposed with four fixing holes 2616 corresponding to the four fixing columns 2911, respectively. The four fixing columns 2911 are respectively connected in cooperation with the four fixing holes 2616 so that the circuit board 26 is fixedly connected to the positioning frame 29.

[0062] The first receiving groove 293 and the second receiving groove 294 are provided on one side of the positioning frame 29 facing the circuit board 26. The first receiving groove 293 and the second receiving groove 294 are spaced apart and parallel to each other. The first receiving groove 293 and the second receiving groove 294 are parallel to the sliding direction (i.e., the Y-axis direction) of the first locking element 231. The first memory alloy element 251 can be accommodated in the first receiving groove 293, and the second memory alloy element 281 can be accommodated in the second receiving groove 294. Specifically, two parallel and spaced first receiving grooves 293 are located on one side of the support plate 292, and two parallel and spaced second receiving grooves 294 are located on the other side opposite to the support plate 292. The fixing portion 291 also includes a plurality of support bars 2913 disposed on one side of the positioning frame 291 facing the circuit board 26. The plurality of support bars 2913 are parallel and spaced from each other. Each support bar 2913 is parallel to the first receiving groove 293. The plurality of support bars 2913 surround the first receiving groove 293 and the second receiving groove 294. The support bars 2913 are used to support the circuit board 26 to prevent the first memory alloy wire 2511 and the second memory alloy wire 281 from contacting the circuit board 26 to avoid short circuit. Preferably, the fixing column 2911 is convexly disposed on the support bar 2913, and the fixing column 2911 extends along the X-axis direction.

[0063] The first slide groove 295 and the second slide groove 296 are respectively provided at opposite ends of the positioning frame 29. The first slide groove 295 extends along the moving direction of the first locking member 231 and communicates with the first receiving groove 293. The second slide groove 296 extends along the moving direction of the second locking member 271 and communicates with the second receiving groove 294. The first connecting member 255 is slidably accommodated in the first slide groove 295, and the second connecting member 285 is slidably accommodated in the second slide groove 296. Specifically, the first slide groove 295 and the second slide groove 296 are respectively provided at opposite ends of the side of the support plate 292 facing the circuit board 26. The first slide groove 295 is parallel to the first receiving groove 293 and communicates with the ends of the two first receiving grooves 293. The second slide groove 296 is parallel to the second receiving groove 294 and communicates with the ends of the two second receiving grooves 294.

[0064] The first receiving groove 297 and the second receiving groove 298 are respectively provided at two opposite ends of the side of the positioning frame 29 facing the circuit board 26. The first receiving groove 297 extends along the sliding direction of the first locking member 231. One end of the first receiving groove 297 is connected to the first slide groove 295, and the other opposite end of the first receiving groove 297 passes through the end surface of the positioning frame 29. The second receiving groove 298 extends along the sliding direction of the second locking member 271. One end of the second receiving groove 298 is connected to the second slide groove 296, and the other opposite end of the second receiving groove 298 passes through the end surface of the positioning frame 29. The first receiving groove 297 is used to receive the first elastic member 253, and the second receiving groove 298 is used to receive the second elastic member 283. The side of the positioning frame 29 facing the circuit board 26 is provided with a mounting hole 2922 and a positioning hole 2924 at two opposite ends of the fixing portion 291.

[0065] In the present invention, the first restoring member 234 is a first spring that can be sleeved on the first guide slide bar 2313 , and the second restoring member 274 is a second spring that can be sleeved on the second guide slide bar 2713 .

[0066] Please also read Figure 4-Figure 24When assembling the locking mechanism 21, the first reset member 234 is sleeved on the first guide slide 2313, and the first reset member 234 and the first guide slide 2313 are inserted into the first guide groove 2320 from the first outlet 2321, so that the first connecting portion 2315 passes through the first through hole 2328 of the first fixing member 232 and is exposed; the first connecting ring 2533 at one end of the first elastic member 253 is connected to the first connecting portion 2315, and the first connecting ring 2533 at the other end of the first elastic member 253 is connected to the first connecting member 255; specifically, the locking member (such as a screw) passes through the first connecting ring 2533 and is locked in The first connection hole 2316 of the first connection portion 2315 connects the first elastic member 253 to the first locking member 231. The first connection ring 2533 of the first elastic member 253 away from the first locking member 231 is located in the first interval 2556 of the first connection member 255 and is sleeved on the first positioning column 2554, so that the first elastic member 253 is connected to the first connection member 255. The first memory alloy wire 2511 is accommodated in the first interval 2556 of the first connection member 255 and hung on the first connection column 2553. The first connection hook 2513 of the first memory alloy member 251 is clamped on the circuit board. 26; sleeve the second reset member 274 on the second guide slide 2713, insert the second reset member 274 and the second guide slide 2713 from the second outlet 2721 into the second guide groove 2720, so that the second connecting portion 2715 passes through the second through hole 2728 of the second fixing member 272 and is exposed; connect the second connecting ring 2833 at one end of the second elastic member 283 to the second connecting portion 2715, and connect the second connecting ring 2833 at the other end of the second elastic member 283 to the second connecting member 285; specifically, the locking member (such as a screw) passes through the second connecting ring 2833 and is locked in the second The second connecting hole 2716 of the connecting portion 2715 connects the second elastic member 283 to the second locking member 271, and the second connecting ring 2833 of the second elastic member 283 away from the second locking member 271 is located in the second interval 2856 and sleeved on the second positioning column 2854, so that the second elastic member 283 is connected to the second connecting member 285; the second memory alloy wire 2811 is accommodated in the second interval 2856 of the second connecting member 285 and hung on the second connecting column 2853, and the second connecting hook 2813 of the second memory alloy member 281 is clamped on the second end 265 of the circuit board 26.Install the circuit board 26 to the fixing portion 291. Specifically, insert the fixing columns 2911 of the positioning frame 29 into the fixing holes 2615 corresponding to the circuit board 26 until the circuit board 26 presses against the support bar 2913. Accommodate the first connecting member 255 and the first elastic member 253 in the first slide groove 295 and the first receiving groove 297 of the positioning frame 29, respectively, so that the first memory alloy wire 2511 is accommodated in the first receiving groove 293 of the positioning frame 29. Accommodate the second connecting member 285 and the second elastic member 283 in the second slide groove 296 and the second receiving groove 298 of the positioning frame 29, respectively, so that the second memory alloy wire 281 is accommodated in the second receiving groove 294 of the positioning frame 29.

[0067] Please also read Figure 1-Figure 5 and Figure 15-Figure 24When assembling the electronic device 100, the locking mechanism 21 is installed to the first housing 22. Specifically, the positioning frame 29, the first fixing member 232 and the second fixing member 272 of the locking mechanism 21 are connected to the connecting strip 225 of the first housing 22. The side of the locking mechanism 21 provided with the circuit board 26 is attached to the connecting strip 225, and the positioning posts 2257 of the connecting strip 225 are respectively inserted into the corresponding positioning holes 2924; the locking members (such as screws) are passed through the mounting holes 2922 of the positioning frame 29 and are locked in the corresponding positioning holes 2256 of the connecting strip 225, so that the positioning frame 29 is fixedly connected to the connecting strip 225, and the first connecting member 255, the first elastic member 253, the second connecting member 285 and the second elastic member 274 are located between the positioning frame 29 and the connecting strip 225, which can prevent The first connecting member 255, the first elastic member 253, the second connecting member 285 and the second elastic member 274 are separated from the positioning frame 29; the first fixing member 232 is attached to the connecting strip 225 of the first shell 22, so that the first mounting hole 2326 of the first fixing member 232 is opposite to the first fixing hole 2251, and the locking member (such as a screw) passes through the first mounting hole 2326 and is locked to the first fixing hole 2251 of the connecting strip 225, so that the first fixing member 232 is fixedly connected to the first shell 22; the second fixing member 272 is attached to the connecting strip 225 of the first shell 22, so that the second mounting hole 2726 of the second fixing member 272 is opposite to the second fixing hole 2253, and the locking member (such as a screw) passes through the second mounting hole 2726 and is locked to the second fixing hole 2253 of the connecting strip 225. At this time, the first memory alloy wire 2511 and the second memory alloy wire 2811 are both in a straightened state, the first locking tongue 2311 of the first locking member 231 extends out of the first fixing member 232 toward one of the first end walls 223, and the second locking tongue 2711 of the second locking member 271 extends out of the second fixing member 272 toward the other first end wall 223; the side of the second shell 24 away from the second side wall 244 is inserted into the first receiving space 227 of the first shell 22, so that the two guide slides 2430 of the second shell 24 are slidably inserted into the two guide grooves 2230 respectively, and the guide rails 246 can be slidably accommodated in the guide grooves of the first shell 22, so that the flexible circuit board 262 is electrically connected to the mainboard 30. At this time, the first locking tongue 2311 and the second locking tongue 2711 are respectively inserted into the first locking opening 2414 and the second locking opening 2415 on the side farthest from the second side wall 244, and the first shell 22 and the second shell 24 are in a fully expanded state; the mainboard 30 can control the driving member 80 to drive the second shell 24 to slide relative to the first shell 22 along the X-axis direction.

[0068] The back side of the sliding area 64 of the flexible screen 60 is attached to the front side of the supporting device 50, the positioning area 62 of the flexible screen 60 is accommodated in the positioning groove 2210 of the first shell 22, and the back side of the positioning area 62 is fixedly attached to the front side of the top wall 221, and one side of the flexible screen 60 is clamped in the connecting groove 2240 of the first shell 22; the side of the supporting device 50 facing away from the flexible screen 60 is surrounded by the second shell 24; the side of the supporting device 50 close to the positioning area 62 is connected to the first shell 22, and the side of the supporting device 50 away from the positioning area 62 is slidably connected to the bottom wall 241 of the second shell 24, so that the supporting device 50 and the flexible screen 60 can be slidably surrounded on the second shell 24. At this time, when the power supply 40 and the first memory alloy component 25 are energized, the first memory alloy wire 2511 shrinks due to heat and drives the first locking member 231 to slide in the first guide groove 2320 of the first fixing member 232, so that the first locking tongue 2311 is disengaged from the first locking opening 2414; when the power supply 40 and the second memory alloy component 28 are energized, the second memory alloy wire 2811 shrinks due to heat and drives the second locking member 271 to slide in the second guide groove 2720 of the second fixing member 272, so that the second locking tongue 2711 is disengaged from the second locking member 2415, the first reset member 234 and the second reset member 274 are compressed, the second shell 24 and the first shell 22 are in an unlocked state, and the second shell 24 can move along the X-axis direction relative to the first shell 22. Specifically, when the power supply 40 energizes the first memory alloy wire 2511 through the circuit board 26, the contraction of the first memory alloy wire 2511 generates a contraction force acting on the first elastic member 253, and the force is applied to the first locking member 231 through the first elastic member 253, and the first reset member 234 is compressed, so that the first lock tongue 2311 is disengaged from the first locking port 2414; when the power supply 40 energizes the second memory alloy wire 2811 through the circuit board 26, the contraction of the second memory alloy wire 2811 generates a contraction force acting on the second elastic member 283, and the force is applied to the second locking member 271 through the second elastic member 283, and the second reset member 274 is compressed, so that the second lock tongue 2711 is disengaged from the second locking port 2415, so as to realize automatic unlocking of the locking mechanism 21, and the second shell 24 and the first shell 22 can move relative to each other. When the power supply 40 stops energizing the first memory alloy wire 2511, the first memory alloy wire 2511 returns to its original length, the first reset member 234 is elastically reset, and the first reset member 234 pushes the first locking member 231 to move away from one end of the first memory alloy wire 2511, so that the first locking tongue 2311 is inserted into the first locking opening 2414; when the power supply 40 stops energizing the second memory alloy wire 2811, the second memory alloy wire 2811 returns to its original length, the second reset member 274 is elastically reset, and the second reset member 274 pushes the second locking member 271 to move away from one end of the second memory alloy wire 2811, so that the second locking tongue 2711 is inserted into the second locking opening 2415; so as to realize automatic locking of the locking mechanism 21 and prevent the second shell 24 from moving relative to the first shell 22.

[0069] Preferably, the first lock tongue 2311 and the second lock tongue 2711 can be synchronously extended from the first fixing member 232 and the second fixing member 272, respectively, and the first lock tongue 2311 and the second lock tongue 2711 can be synchronously retracted to the second fixing member 232 and the second fixing member 272, respectively; specifically, the power supply 40 synchronously energizes the first memory alloy wire 2511 and the second memory alloy wire 2811, the first memory alloy wire 2511 and the second memory alloy wire 2811 are synchronously retracted, and the first lock tongue 2311 and the second lock tongue 2 711 are synchronously disengaged from the corresponding first locking port 2414 and the second locking port 2415 respectively, so as to unlock the locking mechanism 21b; when the power supply 40 and the first memory alloy wire 2511 and the second memory alloy wire 2811 are synchronously powered off, the first memory alloy wire 2511 and the second memory alloy wire 2811 are synchronously restored to their original lengths, and the first locking tongue 2311 and the second locking tongue 2711 are synchronously inserted into the corresponding first locking port 2414 and the second locking port 2415 respectively, so as to lock the locking mechanism 21.

[0070] The contraction amount of the first memory alloy wire 2511 in the sliding direction along the first locking member 231 is greater than or equal to the displacement amount of the first locking member 231 relative to the first fixing member 232, and the contraction amount of the second memory alloy wire 2811 in the sliding direction along the second locking member 272 is greater than or equal to the displacement amount of the second locking member 271 relative to the second fixing member 272.

[0071] Preferably, the elastic coefficient of the first elastic member 253 is greater than the elastic coefficient of the first restoring member 234 , and the elastic coefficient of the second elastic member 274 is greater than the elastic coefficient of the second restoring member 274 . In this embodiment, the first elastic member 253 and the second elastic member 274 are tension springs with the same elastic coefficient, and the first reset member 234 and the second reset member 274 are push springs with the same elastic coefficient; the elastic coefficients of the first reset member 234 and the second reset member 274 are both KF, and the elastic coefficients of the first elastic member 253 and the second elastic member 284 are both KB. The power supply 40 energizes the first memory alloy wire 2511 through the circuit board 26, so that one end of the first memory alloy wire 2511 moves along the Y-axis direction by a displacement of Δx2. After the power supply 40 energizes the second memory alloy wire 2811 through the circuit board 26, one end of the second memory alloy wire 2811 moves along the Y-axis direction by a displacement of Δx2. The first lock tongue 2311 and the second lock tongue 2711 can move along the Y-axis direction by a displacement of Δx1, respectively. The relationship is: The displacement of the first locking member 231 relative to the first fixing member 232 in the first direction (i.e., the Y-axis direction) is smaller than the contraction of the first memory alloy component 25, and the displacement of the second locking member 271 relative to the second fixing member 272 in the first direction (i.e., the Y-axis direction) is smaller than the contraction of the second memory alloy component 28, i.e., Δx2>Δx1; therefore, the displacement Δx1 of the first lock tongue 2311 is smaller than the contraction Δx2 of the first memory alloy wire 2511, i.e., Δx2>Δx1; the displacement Δx1 of the second lock tongue 2711 is smaller than the contraction Δx2 of the second memory alloy wire 2811, i.e., Δx2>Δx1. In order to meet the movement displacement Δx1 stroke of the first lock tongue 2311 or the second lock tongue 2711, the values ​​of Δx1 and Δx2 are generally made close, otherwise, the shrinkage of the first memory alloy wire 2511 and the second memory alloy wire 2811 will produce a large loss, wherein the loss = Δx2-Δx1; therefore, when the overall space of the shell 20 is limited, when KB>>KF, the shrinkage loss of the first memory alloy wire 2511 and the second memory alloy wire 2811 is close to 0.

[0072] When the first locking member 231 and / or the second locking member 271 of the locking mechanism 21 are stuck due to external force, even if the power supply 40 continues to energize the first memory alloy wire 2511 and / or the second memory alloy wire 2811, the first memory alloy wire 2511 will only compress the first elastic member 253 to provide the first memory alloy wire 2511 deformation displacement, and the second memory alloy wire 2811 will only compress the second elastic member 283 to provide the second memory alloy wire 2811 deformation displacement; therefore, the first elastic member 253 has the function of protecting the first memory alloy wire 2511, and the second elastic member 283 has the function of protecting the second memory alloy wire 2811. In this embodiment, by adding the first elastic member 253 at one end of the first memory alloy wire 2511, the first memory alloy wire 2511 can be prevented from being damaged; by adding the second elastic member 283 at one end of the second memory alloy wire 2811, the second memory alloy wire 2811 can be prevented from being damaged, and the structure is simple, the application is convenient, and the cost is low.

[0073] In other embodiments, the locking mechanism 21 can omit the second locking component 27 and the second memory alloy component 28, that is, the locking mechanism 21 only includes the first locking component 23 and the first memory alloy component 25 connected to the positioning frame 29 and the circuit board 26, and the second shell 24 is provided with a plurality of first locking openings 2412 along its sliding direction relative to the first shell 24, and the first locking tongue 2311 of the first locking component 23 can be selectively inserted into one of the plurality of first locking openings 2412.

[0074] In other embodiments, the locking mechanism 21 can omit the first locking component 23 and the first memory alloy component 25, that is, the locking mechanism 21 only includes a second locking component 27 and a second memory alloy component 28 connected to the positioning frame 29 and the circuit board 26, and the second shell 24 is provided with a plurality of second locking openings 2415 along its sliding direction relative to the first shell 24, and the second locking tongue 2711 of the second locking component 27 can be selectively inserted into one of the plurality of second locking openings 2414.

[0075] like Figure 1-Figure 3 , Figure 6-Figure 8 and Fig.25 As shown, when the flexible screen 60 of the electronic device 100 is completely curled, the power supply 40 and the first memory alloy wire 2511 and the second memory alloy wire 2811 are all in a power-off state, the first memory alloy wire 2511 and the second memory alloy wire 2811 are both in a reset state, the first reset member 234 elastically pushes the first locking member 231 to insert the first locking tongue 2311 into the corresponding first locking opening 2414, and at the same time, the second reset member 274 elastically pushes the second locking member 271 to insert the second locking tongue 2711 into the corresponding second locking opening The first memory alloy wire 2511 and the second memory alloy wire 2811 are energized, and the first memory alloy wire 2511 contracts to drive the first locking tongue 2311 to disengage from the corresponding first locking hole 2414, and the second memory alloy wire 2811 contracts to drive the second locking tongue 2711 to disengage from the corresponding second locking hole 2415, so as to facilitate the contraction of the second shell 24 relative to the first shell 22, and the first reset member 234 and the second reset member 274 are compressed. When the flexible screen 60 of the electronic device 100 is fully unfolded, the first memory alloy wire 2511 and the second memory alloy wire 2811 are both in a power-off state, the first memory alloy wire 2511 and the second memory alloy wire 2511 are restored to their original lengths, the first restoring member 234 elastically pushes the first locking member 231 to insert the first locking tongue 2311 into the corresponding first locking opening 2414, and the second restoring member 274 elastically pushes the second locking member 271 to insert the second locking tongue 2711 into the corresponding second locking opening 2415, so as to prevent the second The shell 24 moves relative to the first shell 22; when the power supply 40 is energized through the circuit board 26 and the first memory alloy wire 2511, the first memory alloy wire 2511 is heated and contracted to drive the first locking tongue 2311 to disengage from the corresponding first locking port 2414; when the power supply 40 is energized through the circuit board 26 and the second memory alloy wire 2811, the second memory alloy wire 2811 is heated and contracted to drive the second locking tongue 2711 to disengage from the corresponding second locking port 2415, so as to facilitate the second shell 24 to unfold relative to the first shell 22.

[0076] Please also read Figure 1-Figure 8 and Figure 24-25When the flexible screen 60 of the electronic device 100 needs to be unfolded or rolled up, the mainboard 30 controls the power supply 40 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811 through the circuit board 26, and the first memory alloy wire 2511 heats and contracts to make the first locking member 231 move toward one end close to the circuit board 26, and the second memory alloy wire 2811 heats and contracts to make the second locking member 271 move toward one end close to the circuit board 26, so that the first locking tongue 2311 and the second locking tongue 2711 are respectively separated from the first locking opening 2414 and the second locking opening 2415, and the second shell 24 and the first shell 22 are in an unlocked state; at this time, the mainboard 30 controls the driving member 80 to push or pull back the second shell 24 to slide along the X-axis direction, so that the second shell 24 is away from or close to the first shell 22, and the second shell 24 slides relative to the supporting device 50 so that the supporting device 50 is unfolded or rolled up, so that the supporting device 50 slides around the second shell 24, and the sliding and rolling area 64 is unfolded or rolled up with the supporting device 50.

[0077] In one embodiment, the stroke detection device 70 is electrically connected to the circuit board 26, and the stroke detection device 70 can be a distance sensor for detecting the position of the second shell 24 moving relative to the first shell 22; the stroke detection device 70 is used to detect the sliding position of the second shell 24 relative to the first shell 22. When the flexible screen 60 needs to be unfolded, the main board 30 controls the power supply 40 through the circuit board 26 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811, and the first memory alloy wire 2511 shrinks due to heat to drive the first locking member 231 to move closer to the circuit board 26 and the second memory alloy wire 2811 to move closer to the circuit board 29, so that the first locking tongue 2311 and the second locking tongue 2711 are respectively disengaged from the first locking port 2414 and the second locking port 2415; the main board 30 controls the driving member 80 to drive the second shell 24 to slide relative to the first shell 22 so that the second shell 24 and the first shell 22 are unfolded with each other, so that the support device 50 slides around the second shell 24, and the sliding area 64 is unfolded with the support device 50. The stroke detection device 70 detects the position of the second shell 24 relative to the first shell 22. When the second shell 24 moves to the position where it needs to be locked relative to the first shell 22, the stroke detection device 70 detects the position of the second shell 24 and calculates the corresponding positions of the first locking opening 2414 and the second locking opening 2415, and then sends a signal to the circuit board 26. The main board 30 receives the signal and controls the power supply 40 and the first memory alloy component 25 and the second memory alloy component 28 to be powered off through the circuit board 26, so that the first memory alloy wire 2511 and the second memory alloy component 28 are locked. The gold wire 2811 returns to its original length, that is, the first memory alloy wire 2511 and the second memory alloy wire 2811 are reset, and the mainboard 30 controls the driving member 80 to stop driving the second shell 24, that is, the second shell 24 does not move relative to the first shell 22, and the first reset member 234 and the second reset member 274 respectively push the first locking tongue 2311 and the second locking tongue 2711 away from each other until the first locking tongue 2311 and the second locking tongue 2711 are respectively inserted into the first locking port 2414 and the second locking port 2415, so that the second shell 24 and the first shell 22 are positioned relative to each other. When the second shell 24 needs to be unfolded again relative to the first shell 22, the mainboard 30 controls the power supply 40 and the first memory alloy wire 2511 and the second memory alloy wire 2811 through the circuit board 26 to energize again, so that the first lock tongue 2311 and the second lock tongue 2711 are disengaged from the first locking port 2414 and the second locking port 2415 to unlock, and repeats the above process until the second shell 24 is fully unfolded relative to the first shell 22 and the flexible screen 60 is in a fully unfolded state.When the flexible screen 60 needs to be curled, the main board 30 controls the power supply 40 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811 through the circuit board 26. The first memory alloy wire 2511 and the second memory alloy wire 2811 shrink due to heat to drive the first locking member 231 and the second locking member 271 to move closer to each other, so that the first locking tongue 2311 and the second locking tongue 2711 are respectively disengaged from the first locking port 2414 and the second locking port 2415; the main board 30 controls the driving member 80 to drive the second shell 24 to slide relative to the first shell 22 so that the second shell 24 and the first shell 22 move closer to each other, so that the support device 50 slides around the second shell 24, and the sliding area 64 curls with the support device 50. The stroke detection device 70 detects the position of the second shell 24 relative to the first shell 22. When the second shell 24 moves to the position required to be locked relative to the first shell 22, the stroke detection device 70 detects the position of the second shell 24 and calculates the corresponding positions of the first locking port 2414 and the second locking port 2415, and then sends a signal to the main board 30. The main board 30 receives the signal and controls the power supply 40 and the first memory alloy component 25 and the second memory alloy component 28 to be powered off through the circuit board 26, so that the first memory alloy component 25 and the second memory alloy component 28 are restored to their original lengths. At the same time, the main board 30 controls the driving member 80 to stop driving the second shell 24, and the first reset member 234 and the second reset member 274 respectively push the first lock tongue 2311 and the second lock tongue 2711 away from each other until the first lock tongue 2311 and the second lock tongue 2711 are respectively inserted into the first locking port 2414 and the second locking port 2415. When the second shell 24 needs to be moved closer to the first shell 22 again, the mainboard 30 controls the power supply 40 and the first memory alloy wire 2511 and the second memory alloy wire 2811 through the circuit board 26 to energize again, so that the first lock tongue 2311 and the second lock tongue 2711 are disengaged from the first locking port 2414 and the second locking port 2415 to unlock, and the above process is repeated until the second shell 24 is completely contracted relative to the first shell 22 and the flexible screen 60 is in a completely curled state.

[0078] In another embodiment, during the movement of the second shell 24 relative to the first shell 22, the stroke detection device 70 is used to detect the position of the second shell 24 relative to the first shell 22, and calculate the time required for the second shell 24 to move to the locked position relative to the first shell 22, and the stroke detection device 70 sends a signal to the circuit board 26, the circuit arc 26 receives the signal and controls the power supply 40 and the first memory alloy component 25 and the second memory alloy component 28 to be powered off in advance, the first memory alloy component 25 and the second memory alloy component 28 are gradually reset, and the first reset member 234 and the second reset member 274 are respectively pushed The first locking tongue 2311 and the second locking tongue 2711 gradually move away from each other, and at the same time, the second housing 24 continues to move relative to the first housing 22. When the first locking tongue 2311 and the second locking tongue 2711 are respectively facing the corresponding first locking opening 2414 and the second locking opening 2415, the mainboard 40 controls the driving member 80 to stop driving the second housing 24 to move relative to the first housing 22, and the first locking tongue 2311 and the second locking tongue 2711 are respectively inserted into the first locking opening 2414 and the second locking opening 2415, and the second housing 24 is locked with the first housing 22, that is, the second housing 24 cannot move relative to the first housing 22. When the second housing 24 needs to move again relative to the first housing 22, the first memory alloy wire 2511 and the second memory alloy wire 2811 are powered on again to unlock, and the above process is repeated. The other embodiment can improve the response time of the locking mechanism 21.

[0079] like Figure 6-Figure 10Since the first fixing member 232 of the locking mechanism 21 is provided with a first stop portion 2323 and the second fixing member 272 is provided with a second stop portion 2723, the first locking tongue 2311 can slide in the first guide groove 2320 and stop at the first stop portion 2323, and the second locking tongue 2711 can slide in the second guide groove 2720 and stop at the second stop portion 2723; therefore, when the first memory alloy wire 2511 is energized, the first memory alloy wire 2511 is heated and contracted to drive the first locking tongue 2311 to move in the first direction. The second memory alloy wire 2811 slides in a guide groove 2320 and contracts due to heat to drive the second lock tongue 2711 to slide in the second guide groove 2720, and the first lock tongue 2311 and the second lock tongue 2711 are respectively stopped at the first stop portion 2323 and the second stop portion 2723 to ensure that the first memory alloy wire 2511 and the second memory alloy wire 2811 can shrink to the maximum position in the Y direction to prevent the first memory alloy wire 2511 and the second memory alloy wire 2811 from shrinking too much. Since the first memory alloy wire 2511 and the second memory alloy wire 2811 may get stuck during the process of contraction when energized, the stuck means that the first memory alloy wire 2511 and the second memory alloy wire 2811 have no contraction in the travel space, but the power supply 40 continues to energize the first memory alloy wire 2511 and the second memory alloy wire 2811; at this time, the first elastic member 253 and the second elastic member 284 have a buffering effect, thereby preventing the first memory alloy wire 2511 from being damaged or broken.

[0080] In some embodiments, the mainboard 30 can also be used to control and prevent the first memory alloy wire 2511 and the second memory alloy wire 2811 from being stuck. Specifically, the resistance value of the first memory alloy wire 2511 and the second memory alloy wire 2811 can be detected in real time, and the stuck state can be detected according to the change of the resistance value. That is, when the detected resistance value reaches a specific value, the mainboard 30 controls the power supply 40 to reduce the current of the first memory alloy wire 2511 and the second memory alloy wire 2811 to maintain the state or directly cut off the power supply. The specific value refers to the resistance value of the first memory alloy wire 2511 and the second memory alloy wire 2811 when there is no contraction in the travel space.

[0081] The mainboard 30 of the electronic device 100 of the present invention controls the driving member 80 through the circuit board 26 to drive the second shell 24 to move relative to the first shell 22, so as to realize the automatic expansion or contraction of the shell 20. The sliding area 64 of the flexible screen 60 is automatically expanded or curled with the second shell 24, which is convenient to use. After the sliding area 64 is expanded, the display surface of the flexible screen 60 can be increased, which is convenient for users to use. After the sliding area 64 is curled, the volume of the electronic device 100 can be reduced to facilitate users to carry. In addition, after the second shell 24 is expanded relative to the first shell 22, it is automatically locked through the locking mechanism 21 to prevent the second shell 24 from moving relative to the first shell 22, and when the electronic device 100 falls, the second shell 24 can be prevented from falling relative to the first shell 22. The movement of the first shell 22 can effectively protect the electronic device 100 as a whole, prevent the loss of the flexible screen 60 and damage to the mechanism inside the shell 20; secondly, the locking mechanism 21 realizes automatic unlocking or automatic locking by energizing the first memory alloy wire 2511 and the second memory alloy wire 2811, and the logic is simple, and multi-level locking or unlocking can be realized, and the first memory alloy wire 2511 and the second memory alloy wire 2811 have a large energy density, driving strain and driving stress, and the driving voltage required by the first memory alloy wire 2511 and the second memory alloy wire 2811 is low and easy to obtain; in addition, the locking mechanism 21 has a small weight and a small volume, and occupies a small internal space of the shell 20, which is convenient for the layout of other components.

[0082] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A locking mechanism, characterized in that: The locking mechanism comprises: A first locking assembly, the first locking assembly comprising a first fixing member, a first locking member, and a first resetting member disposed between the first fixing member and the first locking member, the first locking member being movably connected to the first fixing member, the first locking member comprising a first locking tongue, and the first resetting member having an elastic force for driving the first locking member to move and reset relative to the first fixing member; A first memory alloy component, the first memory alloy component comprising a first memory alloy piece and a first elastic piece, the first memory alloy piece being connected to the first elastic piece; A circuit board, an end of the first memory alloy member away from the first elastic member is connected to the circuit board, and an end of the first elastic member away from the first memory alloy member is connected to the first locking member, wherein the circuit board controls the first memory alloy member to drive the first locking member to move relative to the first fixing member, so that the first locking tongue extends out or retracts from the first fixing member; A second locking assembly; and The positioning frame comprises a fixing portion arranged in the middle thereof, the circuit board is fixedly connected to the fixing portion, and the first locking component and the second locking component are respectively arranged at two opposite ends of the positioning frame.

2. The locking mechanism according to claim 1, characterized in that: The locking mechanism also includes a second memory alloy component, the second locking component includes a second fixing component, a second locking component, and a second reset component arranged between the second fixing component and the second locking component, the second locking component is movably connected to the second fixing component, the second locking component includes a second locking tongue, and the second reset component has an elastic force for driving the second locking component to move and reset relative to the second fixing component; the second memory alloy component includes a second memory alloy component and a second elastic component connected to the second locking component, the second memory alloy component is connected to the second elastic component, and the end of the second memory alloy component away from the second elastic component is connected to the circuit board, and the circuit board controls the second memory alloy component to drive the second locking component to move relative to the second fixing component so that the second locking tongue is extended or retracted to the second fixing component.

3. The locking mechanism according to claim 2, characterized in that: The first memory alloy component also includes a first connecting piece, one end of the first elastic piece away from the first locking piece is connected to the first connecting piece, the first memory alloy component includes a first memory alloy wire, the first memory alloy wire is hung on the first connecting piece, and the end of the first memory alloy wire away from the first connecting piece is connected to the circuit board; the second memory alloy component also includes a second connecting piece, one end of the second elastic piece away from the second locking piece is connected to the second connecting piece, the second memory alloy component includes a second memory alloy wire, the second memory alloy wire is hung on the second connecting piece, and the end of the second memory alloy wire away from the second connecting piece is connected to the circuit board.

4. The locking mechanism according to claim 3, characterized in that: The first connecting member includes a first connecting plate, a first connecting column and a first positioning column arranged on the first connecting plate, the first memory alloy wire is hung on the first connecting column, and the end of the first elastic member away from the first locking member is positioned at the first positioning column; the second connecting member includes a second connecting plate, a second connecting column and a second positioning column arranged on the second connecting plate, the second memory alloy wire is hung on the second connecting column, and the end of the second elastic member away from the second locking member is positioned at the second connecting column.

5. The locking mechanism according to claim 3, characterized in that: The first memory alloy component also includes a first connecting hook connected to the end of the first memory alloy wire, the first connecting hook is connected to the circuit board, and the first memory alloy wire is electrically connected to the circuit board through the first connecting hook; the second memory alloy component also includes a second connecting hook connected to the end of the second memory alloy wire, the second connecting hook is connected to the circuit board, and the second memory alloy wire is electrically connected to the circuit board through the second connecting hook.

6. The locking mechanism according to claim 5, characterized in that: The circuit board includes a rectangular plate body, which includes a first end and a second end opposite to each other, the first end is close to the second locking component, the second end is close to the first locking component, the first connecting hook is clamped at the second end, the second connecting hook is clamped at the first end, and the first memory alloy wire and the second memory alloy wire are spaced apart from each other.

7. The locking mechanism according to claim 3, characterized in that: The positioning frame also includes a rectangular support plate, the fixing portion includes a fixing column arranged in the middle of the support plate facing the circuit board, the circuit board is provided with a fixing hole corresponding to the fixing column, and the fixing column is detachably connected to the fixing hole.

8. The locking mechanism according to claim 7, characterized in that: The positioning frame is provided with a first receiving groove and a second receiving groove on one side facing the circuit board. The first receiving groove and the second receiving groove are spaced apart from each other. The first memory alloy component is accommodated in the first receiving groove, and the second memory alloy component is accommodated in the second receiving groove.

9. The locking mechanism according to claim 8, characterized in that: The fixing portion also includes a plurality of support bars disposed on a side of the positioning frame facing the circuit board, the plurality of support bars are parallel and spaced apart from each other, the plurality of support bars are parallel to the first receiving groove, the plurality of support bars surround the first receiving groove and the second receiving groove, and the support bars are used to support the circuit board.

10. The locking mechanism according to claim 8, characterized in that: The positioning frame is provided with a first slide groove and a second slide groove at opposite ends thereof, respectively. The first slide groove extends along the moving direction of the first locking piece and is connected to the first receiving groove, the second slide groove extends along the moving direction of the second locking piece and is connected to the second receiving groove, the first connecting piece can be slidably accommodated in the first slide groove, and the second connecting piece can be slidably accommodated in the second slide groove.

11. The locking mechanism according to claim 10, characterized in that: The positioning frame has a first receiving groove and a second receiving groove at opposite ends, the first slide groove is located between the first receiving groove and the first receiving groove, the first receiving groove extends along the moving direction of the first locking piece and is connected to the first slide groove, the second slide groove is located between the second receiving groove and the second receiving groove, the second receiving groove extends along the moving direction of the second locking piece and is connected to the second slide groove, the first elastic member is accommodated in the first receiving groove, and the second elastic member is accommodated in the second receiving groove.

12. The locking mechanism according to claim 3, characterized in that: The first fixing member is provided with a first guide groove along the first direction, the first guide groove passes through the end surface of the first fixing member away from the first memory alloy wire to form a first outlet, the first locking member is slidably accommodated in the first guide groove, and the first locking tongue extends out or retracts at the first outlet under the drive of the first memory alloy wire; the second fixing member is provided with a second guide groove along the first direction, the second guide groove passes through the end surface of the second fixing member away from the second memory alloy wire to form a second outlet, the second locking member is slidably accommodated in the second guide groove, and the second locking tongue extends out or retracts at the second outlet under the drive of the second memory alloy wire.

13. The locking mechanism according to claim 3, characterized in that: The contraction amount of the first memory alloy wire along the sliding direction of the first locking member is greater than the displacement amount of the first locking member relative to the first fixing member, and the contraction amount of the second memory alloy wire along the sliding direction of the second locking member is greater than the displacement amount of the second locking member relative to the second fixing member.

14. The locking mechanism according to claim 12, characterized in that: The first locking member also includes a first guide slide slidably connected to the first fixing member, one end of the first guide slide is connected to the first locking tongue, the other end of the first guide slide is connected to the first elastic member, the first reset member is sleeved on the first guide slide, and the opposite ends of the first reset member respectively abut against the first locking tongue and the first fixing member; the second locking member also includes a second guide slide slidably connected to the second fixing member, one end of the second guide slide is connected to the second locking tongue, the other end of the second guide slide is connected to the second elastic member, the second reset member is sleeved on the second guide slide, and the opposite ends of the second reset member respectively abut against the second locking tongue and the second fixing member.

15. The locking mechanism according to claim 14, characterized in that: The first locking member also includes a first connecting portion connected to an end of the first guide slide away from the first locking tongue, and the first connecting portion is connected to the first elastic member after extending out of the first fixing member; the second locking member also includes a second connecting portion connected to an end of the second guide slide away from the second locking tongue, and the second connecting portion is connected to the second elastic member after extending out of the second fixing member.

16. The locking mechanism according to claim 15, characterized in that: A first through hole connected to the first guide groove is provided at one end of the first fixing member away from the first outlet, and the first guide slide bar can be slidably inserted into the first through hole; a second through hole connected to the second guide groove is provided at one end of the second fixing member away from the second outlet, and the second guide slide bar can be slidably inserted into the second through hole.

17. The locking mechanism according to claim 1, characterized in that: The elastic coefficient of the first reset member is KF, the elastic coefficient of the first elastic member is KB, the displacement of the first memory alloy member after power is supplied is Δx2, and the displacement of the first lock tongue driven by the first memory alloy member is Δx1, wherein 18. The locking mechanism according to claim 2, characterized in that: The first locking tongue and the second locking tongue can be respectively extended out of the first fixing member and the second fixing member synchronously, or the first locking tongue and the second locking tongue can be respectively retracted in the second fixing member and the second fixing member synchronously.

19. A housing, characterized in that: The housing comprises a locking mechanism according to any one of claims 1 to 18, a first housing and a second housing, the first housing and the second housing are slidably connected to each other, a first fixing member of the locking mechanism is connected to the first housing, the second housing is provided with a first locking opening, the first housing and the second housing are in a locked state or an unlocked state, and in the locked state, a first locking tongue of the locking mechanism is inserted into the first locking opening; In the unlocked state, the first locking tongue of the locking mechanism is disengaged from the first locking opening.

20. The housing according to claim 19, characterized in that The second shell is provided with a plurality of the first locking openings along its sliding direction relative to the first shell, and the first locking tongue can be selectively inserted into one of the plurality of the first locking openings.

21. An electronic device, characterized in that: The electronic device includes a shell as described in any one of claims 19-20 and a power supply arranged in the shell, the power supply is electrically connected to the circuit board and the first memory alloy component, and the circuit board is used to control the power supply and the first memory alloy component to be powered on or off so as to shrink or reset the first memory alloy component.

22. The electronic device according to claim 21, characterized in that: When the power supply and the first memory alloy component are powered on, the first memory alloy component contracts to drive the first lock tongue to disengage from the first locking opening; when the power supply and the first memory alloy component are powered off, the first memory alloy component resets to allow the first lock tongue to be inserted into the first locking opening.

23. The electronic device according to claim 21, characterized in that: It also includes a stroke detection device electrically connected to the circuit board, the stroke detection device is used to detect the sliding position of the second shell relative to the first shell, when the second shell slides to the position required to be locked relative to the first shell, the stroke detection device detects the position of the second shell and sends a signal to the circuit board, the circuit board receives the signal and controls the power supply and the first memory alloy component to be powered off, the first memory alloy component is reset, and the first reset component pushes the first lock tongue to move until the first lock tongue is inserted into the first locking port.

24. The electronic device according to claim 21, characterized in that: It also includes a stroke detection device electrically connected to the circuit board, the stroke detection device is used to detect the position of the second shell relative to the first shell, and calculate the time required for the second shell to move to the locking position relative to the first shell, and the stroke detection device sends a signal to the circuit board, the circuit board receives the signal and controls the power supply and the first memory alloy component to be powered off, the first memory alloy component is reset, the first reset component pushes the first lock tongue to move, and at the same time, the second shell continues to move relative to the first shell until the first lock tongue is opposite to the first locking port, and the first lock tongue is inserted into the first locking port.

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