Self-locking mechanism, housing and electronic device

Abstract

The present application provides a self-locking mechanism, which comprises a fixing assembly, a locking assembly and a memory alloy piece. The fixing assembly comprises a first fixing piece. The locking assembly comprises a first locking piece and a first elastic piece. The first locking piece is movably connected to the first fixing piece. The first locking piece comprises a first locking tongue. The first elastic piece has an elastic force to drive the first locking piece to move back relative to the first fixing piece. One end of the memory alloy piece is connected to the first locking piece. The memory alloy piece is used to drive the first locking piece to move relative to the first fixing piece, so that the first locking tongue extends out or shrinks into the first fixing piece. The present application also provides a shell provided with the self-locking mechanism and an electronic device provided with the shell.

Description

Technical Field

[0001] This invention relates to the field of electronic equipment technology, and in particular to a self-locking mechanism for locking, a housing having said self-locking mechanism, and an electronic device having said housing. Background Technology

[0002] With the development and application of flexible screens, electronic devices with variable screen shapes have emerged, such as foldable phones and rollable phones. Taking rollable phones as an example, a rollable phone consists of two shells that slide together. A motor typically pushes the two shells apart or together to unfold or roll the screen. However, in these technologies, the two shells lack a locking mechanism. Therefore, the positioning effect of the rollable screen in its unfolded state is poor. Furthermore, if the rollable phone is dropped, the two shells may quickly move together under external force, easily damaging the screen or the phone's internal structure. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a self-locking mechanism that can automatically lock the relative movement of the first housing and the second housing. The present invention also provides a housing equipped with the above-described self-locking mechanism, and an electronic device equipped with the above-described housing.

[0004] This invention provides a self-locking mechanism, comprising a fixing component, a locking component, and a shape memory alloy component. The fixing component includes a first fixing member; the locking component includes a first locking member and a first elastic member, the first locking member being movably connected to the first fixing member, the first locking member including a first latch, and the first elastic member having a spring force that drives the first locking member to move and reset relative to the first fixing member; one end of the shape memory alloy component is connected to the first locking member, and the shape memory alloy component is used to drive the first locking member to move relative to the first fixing member, so that the first latch extends or retracts within the first fixing member.

[0005] This invention also provides a housing, which includes a self-locking mechanism, 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 self-locking mechanism is connected to the first housing. The second housing is provided with a first locking port. The first housing and the second housing are in a locked state or an unlocked state. In the locked state, the first locking tongue of the self-locking mechanism is inserted into the first locking port. In the unlocked state, the first locking tongue of the self-locking mechanism is disengaged from the first locking port.

[0006] This invention also provides an electronic device, which includes a housing, a power supply and a motherboard disposed on the housing, wherein the power supply is electrically connected to the motherboard and a shape memory alloy component, and the motherboard is used to control the power supply and the shape memory alloy component to be powered on or off, so that the shape memory alloy component shrinks or resets.

[0007] The memory alloy component of the self-locking mechanism of the electronic device of the present invention is connected at least one end to the first locking fastener. When the power supply is applied to the memory alloy component, the memory alloy component contracts to drive the first locking fastener to move relative to the first fixing member in a first direction, causing the first locking tongue to disengage from the first locking port and releasing the second housing from the first housing. When the power supply is de-energized and the memory alloy component is de-energized, the memory alloy component resets, and the first elastic member elastically pushes the first locking fastener to move relative to the first fixing member, so that the first locking tongue inserts into the first locking port and locks the second housing into the first housing. This achieves automatic locking between the second housing and the first housing of the electronic device, resulting in better positioning of the flexible screen in the unfolded state. In the event of a drop, the second housing and the first housing remain fixed to each other and will not come together, preventing damage to the internal structure of the flexible screen or housing. Attached Figure Description

[0008] To more clearly illustrate the technical solution and effects of the present invention, a detailed description is provided below in conjunction with the accompanying drawings and specific embodiments.

[0009] Figure 1 This is a three-dimensional structural schematic diagram of the electronic device according to the first embodiment of the present invention;

[0010] Figure 2 yes Figure 1 A three-dimensional structural diagram of the housing assembly of an electronic device in its unfolded state;

[0011] Figure 3 yes Figure 2 A three-dimensional structural diagram of the housing assembly from another perspective;

[0012] Figure 4 yes Figure 2 An exploded three-dimensional structural diagram of the housing components;

[0013] Figure 5 yes Figure 3 An exploded three-dimensional structural diagram of the housing components;

[0014] Figure 6 yes Figure 4 A further exploded three-dimensional structural diagram of the housing components;

[0015] Figure 7 yes Figure 5 A further exploded three-dimensional structural diagram of the housing components;

[0016] Figure 8 yes Figure 4 Enlarged view of the self-locking mechanism in the image;

[0017] Figure 9 yes Figure 5 Enlarged view of the self-locking mechanism in the image;

[0018] Figure 10 yes Figure 8 An exploded view of the three-dimensional structure of the self-locking mechanism in the diagram;

[0019] Figure 11 yes Figure 8 A exploded view of the self-locking mechanism from another perspective;

[0020] Figure 12 yes Figure 8 A partial three-dimensional sectional view of the self-locking mechanism in the image;

[0021] Figure 13 yes Figure 9 A partial three-dimensional sectional view of the self-locking mechanism in the image;

[0022] Figure 14 yes Figure 2 A partial perspective sectional view of the housing assembly;

[0023] Figure 15 yes Figure 2 A three-dimensional structural diagram of one of the retracted states of the housing assembly;

[0024] Figure 16 yes Figure 2 A three-dimensional structural diagram of another contracted state of the housing assembly;

[0025] Figure 17 This is a three-dimensional structural diagram of the shell assembly in its unfolded state according to the second embodiment of the present invention;

[0026] Figure 18 yes Figure 17 Enlarged schematic diagram of section XVIII;

[0027] Figure 19 This is a three-dimensional structural diagram of the shell assembly in its unfolded state according to the third embodiment of the present invention;

[0028] Figure 20 yes Figure 19 An exploded three-dimensional structural diagram of the housing components;

[0029] Figure 21 yes Figure 20 Enlarged 3D view of the self-locking mechanism in the image;

[0030] Figure 22 yes Figure 21A three-dimensional structural diagram of the self-locking mechanism from another perspective;

[0031] Figure 23 yes Figure 21 A partial structural exploded view of the self-locking mechanism in the diagram;

[0032] Figure 24 yes Figure 22 A partial structural exploded view of the self-locking mechanism in the diagram;

[0033] Figure 25 yes Figure 19 A partial perspective sectional view of the housing assembly;

[0034] Figure 26 This is a three-dimensional structural diagram of the shell assembly in its unfolded state according to the fourth embodiment of the present invention;

[0035] Figure 27 yes Figure 26 An enlarged schematic diagram of section XXVII.

[0036] Explanation of main labels:

[0037] 100. Electronic device; 20. Housing; 22. First housing; 221. 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. Stop; 227. First receiving space; 2210. Positioning groove; 2240. Connecting groove; 228. Guide rail; 24. Second housing; 241. Bottom wall; 2411. First positioning strip; 2412. Second positioning strip; 2414. First locking port; 2415. Second locking port; 2416. Positioning strip; 243. Second end wall; 2430. Guide strip; 244. Second side wall; 246. Guide groove; 247. 26. Reception space; 27. Self-locking mechanism; 28. Fixing assembly; 272. First fixing member; 2720. First guide groove; 2721. First outlet; 2723. First stop part; 2724. First fixing bar; 2725. First fixing piece; 2726. First fixing post; 2727. First through hole; 2728. First through hole; 274. Second fixing member; 2740. Second guide groove; 2741. Second outlet; 2743. Second stop part; 2744. Second fixing bar; 2745. Second fixing piece; 2748. Second through hole; 2766. Second fixing post; 2747. Second through hole; 28. Locking assembly; 282. First locking element; 2821. First locking tongue ; 2823, First guide rail; 2825, First connecting part; 2826, First connecting hole; 284, Second locking element; 2841, Second locking tongue; 2843, Second guide rail; 2845, Second connecting part; 2846, Second connecting hole; 285, First elastic element; 286, Second elastic element; 287, First moving element; 2870, First rectangular block; 2871, First fixing hole; 2872, First locking hole; 2874, First locking post; 2875, First locking block; 2876, First locking hole; 2877, First receiving groove; 288, Second moving element; 2880, Second rectangular block; 2881, Second fixing hole; 2882, Second locking hole; 2884, Second... 2885, Second locking block; 2886, Second locking hole; 2887, Second receiving groove; 29, Shape memory alloy component; 291, Shape memory metal wire; 293, First positioning part; 2931, First positioning piece; 2933, First connecting piece; 2932, First fixing hole; 2934, First locking fastener; 295, Second positioning part; 2951, Second positioning piece; 2952, Second fixing hole; 2953, Second connecting piece; 2954, Second locking fastener; 296, Third elastic component; 297, Positioning block; 30, Main board; 40, Power supply; 50, Support device; 60, Flexible screen; 62, Positioning area; 64, Sliding area; 70, Stroke detection device; 80, Drive component. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0039] It should be noted that, in this document, the reference to "embodiment" or "implementation" means that a specific feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0040] The terms "first" and "second" used in this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. It should be noted that, unless otherwise explicitly stated and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] Please refer to the following: Figures 1-7The electronic device 100 of the first embodiment of the present invention can be applied to mobile phones, tablet computers, laptops, monitors, smartwatches, 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 motherboard 30 disposed in the housing 20, a power supply 40, a support device 50, a flexible screen 60, a travel detection device 70, and a driving component 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 housing 20 includes a first housing 22, a second housing 24, and a self-locking mechanism 26. The second housing 24 and the first housing 22 are slidably connected to each other along the X-axis, so that the first housing 22 and the second housing 24 can retract or expand relative to 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 drive component 80. 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 drive component 80. The support device 50 has a hinge-like structure. One side of the support device 50 is connected to the first housing 22, and the support device 50 is wrapped around the second housing 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 of the first housing 22, and the sliding area 64 is attached to the surface of the support device 50 away from the second housing 24, that is, the sliding area 64 is attached to the front of the support device 50 of the housing 20. When the first housing 22 and the second housing 24 slide relative to each other along the X-axis, the support device 50 rolls around the second housing 24, and the rolling area 64 rolls around the second housing 24 along with the support device 50. Specifically, when the motherboard 30 controls the drive unit 80 to drive the second housing 24 to extend relative to the first housing 22 along the X-axis, that is, when the second housing 24 moves away from the first housing 22 relative to the first housing 22 along the X-axis, the second housing 24 drives the support device 50 to slide and unfold relative to the second housing 24, and the rolling area 64 unfolds synchronously with the support device 50, thereby increasing the display area of ​​the flexible screen 60; when the motherboard 30 controls the drive unit 80 to drive the second housing 24 to contract relative to the first housing 22 along the X-axis, that is, when the second housing 24 moves closer to the first housing 22 relative to the first housing 22 along the X-axis, the second housing 24 drives the support device 50 to slide and curl relative to the second housing 24, and the rolling area 64 curls synchronously with the support device 50, thereby reducing the volume of the housing 20. When the sliding area 64 is unfolded, it increases the display surface of the flexible screen 60, making it more convenient for users; when the sliding area 64 is rolled up, it reduces the size of the electronic device 100, making it easier to carry. During the movement of the second housing 24 relative to the first housing 22, the motherboard 30 can control the self-locking mechanism 26 to automatically lock itself between the second housing 24 and the first housing 22 according to the stroke detection device 70, so that the second housing 24 and the first housing 22 are mutually positioned.

[0042] like Figures 1-5 and Figures 8-11 As shown, the self-locking mechanism 26 includes a fixing component 27, a locking component 28, and a shape memory alloy component 29. The fixing component 27 includes a first fixing member 272 and a second fixing member 274. The locking component 28 includes a first locking member 282, a second locking member 284, a first elastic member 285, and a second elastic member 286. The first locking member 282 is movably connected to the first fixing member 272 along a first direction (i.e., the Y-axis direction), and the second locking member 284 is movably connected to the second fixing member 274 along the first direction (i.e., the Y-axis direction). The first locking member 282 includes a first locking tongue 2821, the second locking tongue 2822, and the third locking tongue 2822. The locking member 284 includes a second latch 2841, and a first elastic member 285 has a spring force that drives the first locking member 282 to reset relative to the first fixing member 272. This spring force drives the first locking member 282 to move along a first direction (i.e., the Y-axis direction) so that the first latch 2821 is positioned between the second housing 24 and the first housing 22. The second elastic member 286 has a function to drive the second locking member 284 to move along the first direction (i.e., the Y-axis direction) so that the second latch 2841 is positioned between the second housing 24 and the first housing 22, so that the second housing 24 and the first housing 22 are positioned relative to each other. The shape memory alloy component 29 is connected to the first locking member 282 and the second locking member 284 at opposite ends. The shape memory alloy component 29 is used to drive the first locking member 282 to move relative to the first fixing member 272 along the first direction and the second locking member 284 to move relative to the second fixing member 274 along the first direction, so that the first locking tongue 2821 extends or retracts from the first fixing member 272 and the second locking tongue 2841 extends or retracts from the second fixing member 274. The second housing 24 can move relative to the first housing 22 along the second direction (i.e., the X-axis direction). The driving member 80 controls the power supply 40 to be energized or de-energized with the shape memory alloy component 29, so that the shape memory alloy component 29 retracts or resets to drive the first locking member 282 and the second locking member 284 to move along the first direction (i.e., the Y-axis direction), so that the first locking tongue 2821 extends or retracts from the first fixing member 272 and the second locking tongue 2841 extends or retracts from the second fixing member 274. When the first locking tongue 2821 and the second locking tongue 2841 extend out of the first fixing member 272 and the second fixing member 274 respectively, the first locking tongue 2821 and the second locking tongue 2841 are 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 2821 and the second locking tongue 2841 retract into the first fixing member 272 and the second fixing member 274 respectively, the first locking tongue 2821 and the second locking tongue 2841 disengage from the second housing 24 and the first housing 22, and the second housing 24 can move relative to the first housing 22.

[0043] In this 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 fastener 282 and the second locking fastener 284 relative to the first fixing member 272 and the second fixing member 274, respectively, and the first direction is the Y-axis direction; the X-axis direction refers to the sliding direction of the second housing 24 relative to the first housing 22, and the second direction is the X-axis direction; the Z-axis direction refers to the direction that is perpendicular to both the X-axis direction and the Y-axis direction, that is, the Z-axis direction is the thickness direction of the electronic device 100.

[0044] In this invention, the shape memory alloy component 29 of the self-locking mechanism 26 is connected to the first locking fastener 282 and the second locking fastener 284 at opposite ends. When the main board 30 controls the power supply 40 to energize the shape memory alloy component 29, the shape memory alloy component 29 contracts due to heat, causing the first locking fastener 282 and the second locking fastener 284 to move closer to each other along the first direction (i.e., the Y-axis direction). The first elastic component 285 and the second elastic component 286 are compressed by the first locking fastener 282 and the second locking fastener 284, respectively, so that the first locking tongue 2821 and the second locking tongue 2841 release the second housing 24 from the first housing 22. The positioning is achieved as follows: When the motherboard 30 controls the power supply 40 and the memory alloy component 29 to be de-energized, the memory alloy component 29 is reset, that is, the memory metal wire 291 returns to its original length. The first elastic component 285 and the second elastic component 286 are respectively elastically reset and push the first locking fastener 282 and the second locking fastener 284 away from each other, so that the first locking tongue 2821 and the second locking tongue 2841 position the second housing 24 and the first housing 22, thereby realizing the automatic locking between the second housing 24 and the second housing 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 is dropped, the second housing 24 and the first housing 22 will not move together because they are fixed to each other, preventing damage to the internal structure of the flexible screen 60 or the housing 20.

[0045] like Figures 1-5As shown, the first housing 22 includes a top wall 221, two first end walls 223 respectively disposed at opposite ends of the top wall 221, a first side wall 224 disposed on one side of the top wall 221, and a connecting strip 225 disposed on the 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 form a first receiving space 227. The first receiving space 227 is used to house components such as the second housing 24, the main board 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 positioned in the positioning groove 2210. A connecting groove 2240 is provided on the first side wall 224 near the top wall 221. The connecting groove 2240 communicates with the positioning groove 2210. The two opposite ends of the connecting groove 2240 extend along the Y-axis to 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 housing 22 has guide grooves 2230 at its opposite ends, which extend along the X-axis to near the first sidewall 224. The second housing 24 is slidably connected to the guide grooves 2230. Specifically, the top wall 221 has guide grooves 2230 between its opposite ends and the two first endwalls 223. The connecting strip 225 extends along the Y-axis to near the two first endwalls 223. The first fixing member 272 and the second fixing member 274 are respectively connected to the opposite ends of the connecting strip 225, so that the first fixing member 272 is close to one of the first endwalls 223 and the second fixing member 274 is close to the other first endwall 223. Specifically, the connecting strip 225 has a first fixing part and a second fixing part at its opposite ends on the side facing away from the first sidewall 224, that is, the first fixing part is close to one of the first endwalls 223 and the second fixing part is close to the other first endwall 223. The first fixing part has a first fixing hole 2251 and the second fixing part has a second fixing hole 2253. A stop portion 2255 is provided between each of the two ends of the connecting strip 225 and the two first end walls 223. Preferably, the outer surface of the first side wall 224 is an arc surface.

[0046] The second housing 24 includes a bottom wall 241, two second end walls 243 respectively disposed at opposite ends of the bottom wall 241, and a second side wall 244 disposed on one side of the bottom wall 241; the bottom wall 241, the second side wall 244, and the two second end walls 243 form a second receiving space 247. The outer surface of the second side wall 244 is an arc surface, that is, the outer surface of the second side wall 244 facing away from the first housing 22 is an arc surface, so as to facilitate the sliding of the support device 50 around the second housing 24. Further, a plurality of protrusions 2441 are provided on the outer surface of the second side wall 244. The plurality of protrusions 2441 are arranged at intervals along the Y-axis direction. The plurality of protrusions 2441 can reduce the contact area between the support device 50 and the second housing 24, which is beneficial to the sliding of the support device 50 around the second housing 24. The second housing 24 is provided with guide strips 2430 at opposite ends. The guide strips 2430 extend along the X-axis to near the second side wall 244. The two guide strips 2430 can be slidably accommodated in the two guide grooves 2230, so that the second housing 24 and the first housing 22 are slidably connected along the X-axis.

[0047] The second housing 24 is provided with a first locking port 2414 and a second locking port 2415. When the first locking tongue 2821 of the first locking component 282 and the second locking tongue 2841 of the second locking component 284 are respectively inserted into the first locking port 2414 and the second locking port 2415, the second housing 24 and the first housing 22 are in a locked state. This locked state means that the second housing 24 cannot move relative to the first housing 22. When the first locking tongue 2821 of the first locking component 282 and the second locking tongue 2841 of the second locking component 284 are respectively disengaged from the first locking port 2414 and the second locking port 2415, the second housing 24 and the first housing 22 are in an unlocked state. This unlocked state means that the second housing 24 can move relative to the first housing 22 along the X-axis. In this embodiment, the bottom wall 241 has a first positioning strip 2411 and a second positioning strip 2412 respectively at opposite ends on the side facing the second receiving space 247. The first positioning strip 2411 extends along the X-axis direction, and the second positioning strip 2412 extends along the X-axis direction. The first positioning strip 2411 has a plurality of first locking holes 2414 along the second direction (X-axis direction), and the second positioning strip 2412 has a plurality of second locking holes 2415 along the second direction (X-axis direction). The first locking device 282 can be selectively inserted into one of the plurality of first locking holes 2414, and the second locking device 284 can be selectively inserted into one of the plurality of second locking holes 2415. Specifically, the first positioning strip 2411 has multiple first mounting slots on the side facing the second positioning strip 2412, arranged along the X-axis. A positioning strip 2416 is connected to each first mounting slot, and each positioning strip 2416 and the first positioning strip 2411 form a first locking opening 2414. Similarly, the second positioning strip 2412 has multiple second mounting slots on the side facing the first positioning strip 2411, arranged along the X-axis. A positioning strip 2416 is connected to each second mounting slot, and each positioning strip 2416 and the second positioning strip 2412 form a second locking opening 2415. The positioning strip 2416 and the first positioning strip 2411 can be connected by, but not limited to, snap-fit, screw-fit, or adhesive bonding. The positioning strip 2416 and the second positioning strip 2412 can also be connected by, but not limited to, snap-fit, screw-fit, or adhesive bonding. The second sidewall 244 has stop grooves 2443 at opposite ends on its side facing the second receiving space 247. The two stop portions 2255 of the first housing 22 abut against the two stop grooves 2443 of the second housing 24 to prevent the second housing 24 from continuing to move closer to the first housing 22. Preferably, the outer surface of the second sidewall 244 is an arc surface, and the end face of the second endwall 243 near the second sidewall 244 is also an arc surface to facilitate the sliding of the support device 50 around the second housing 24.

[0048] The first housing 22 and the second housing 24 are slidably connected by a guide rail 228 and a guide groove 246. The guide rail 228 is provided in one of the first housing 22 and the second housing 24, and the guide groove 246 is provided in the other. In this embodiment, the guide rail 228 is provided in the first receiving space 227 of the first housing 22, and the guide rail 228 extends along the X-axis direction; the guide groove 246 is provided in the second receiving space 247 of the second housing 24, and the guide groove 246 extends along the X-axis direction. When the first housing 22 and the second housing 24 are assembled, the guide rail 228 is slidably connected to the guide groove 246. Specifically, the guide rail 228 is connected to the second end wall 243 of the first housing 22, and both guide grooves 246 are connected to the second bottom wall 2623 of the second housing 24.

[0049] In some embodiments, the second housing 24 has a bottom wall 241 in the second receiving space 247, and the guide rail 228 extends along the X-axis direction. The first housing 22 has a guide groove 246 in the first receiving space 227. When the first housing 22 and the second housing 24 are assembled together, the guide groove 246 is slidably connected to the guide rail 228.

[0050] like Figures 8-11As shown, the shape memory alloy component 29 includes a shape memory metal wire 291. The two ends of the shape memory metal wire 291 are respectively connected to the first locking member 282 and the second locking member 284. The contraction or reset of the shape memory metal wire 291 causes the first locking member 282 and the second locking member 284 to move closer to each other or further away from each other, so that the first locking tongue 2821 extends or retracts from the first fixing member 272 and the second locking tongue 2841 extends or retracts from the second fixing member 274. Specifically, when the memory metal wire 291 is powered on, it contracts to bring the first locking member 282 and the second locking member 284 closer together, causing the first locking tongue 2821 and the second locking tongue 2841 to disengage from the first locking port 2414 and the second locking port 2415, respectively. The first elastic member 285 and the second elastic member 286 are compressed by the first locking member 282 and the second locking member 284, respectively, and the second housing 24 can move relative to the first housing 22 along the X-axis. When the memory metal wire 291 is de-energized, it returns to its original length, and the first elastic member 285 and the second elastic member 286 elastically reset and push the first locking member 282 and the second locking member 284 away from each other, so that the first locking tongue 2821 and the second locking tongue 2841 are inserted into the first locking port 2414 and the second locking port 2415, respectively. The second housing 24 cannot move relative to the first housing 22, that is, the second housing 24 cannot move relative to the first housing 22 along the X-axis. Preferably, when the memory metal wire 291 is powered on, the contraction of the memory metal wire 291 drives the first locking tongue 2821 and the second locking tongue 2841 to retract synchronously to the first fixing member 272 and the second fixing member 274, respectively; when the memory metal wire 291 is de-powered, the memory metal wire 291 returns to its original length, so that the first locking tongue 2821 and the second locking tongue 2841 extend synchronously from the first fixing member 272 and the second fixing member 274, respectively.

[0051] The sum of the displacement of the first locking member 282 relative to the first fixing member 272 along the first direction (i.e., the Y-axis direction) and the displacement of the second locking member 284 relative to the second fixing member 274 along the first direction is slightly greater than or equal to the contraction of the memory metal wire 291 in the first direction (i.e., the Y-axis direction), to prevent the memory metal wire 291 from being pulled or broken. In this embodiment, the contraction of the memory metal wire 291 in the first direction (i.e., the Y-axis direction) is equal to the sum of the displacement of the first locking member 282 relative to the first fixing member 272 along the first direction (i.e., the Y-axis direction) and the displacement of the second locking member 284 relative to the second fixing member 274 along the first direction (i.e., the Y-axis direction).

[0052] like Figure 10 and Figure 11As shown, the first fixing member 272 is provided with a first guide groove 2720 along the first direction (i.e., the Y-axis direction). The first guide groove 2720 passes through the end face of the first fixing member 272 away from the shape memory wire 291 to form a first outlet 2721. The first locking member 282 is slidably accommodated in the first guide groove 2720. The first locking tongue 2821 extends or retracts in the first outlet 2721 under the drive of the shape memory wire 291. The second fixing member 274 is provided with a second guide groove 2740 along the first direction (i.e., the Y-axis direction). The second guide groove 2740 passes through the end face of the second fixing member 274 away from the shape memory wire 291 to form a second outlet 2741. The second locking member 284 is slidably accommodated in the second guide groove 2740. The second locking tongue 2841 extends or retracts in the second outlet 2741 under the drive of the shape memory wire 291. Specifically, the first fixing member 272 includes a first fixing strip 2724 and a first fixing piece 2725 disposed on the outer wall of the first fixing strip 2724. A first guide groove 2720 is disposed on one end face of the first fixing strip 2724 and extends along the Y-axis to the opposite end face near the first fixing strip 2724. The first fixing piece 2725 can be connected to the first fixing part of the first housing 22 by, but not limited to, snap-fitting, screwing, gluing or welding. In this embodiment, the first fixing piece 2725 is provided with a first fixing post 2726, which is used to snap-fit ​​to the first fixing hole 2251 of the first fixing part. Further, the first fixing piece 2725 is provided with a first through hole 2727, and the locking fastener passes through the first through hole 2727 and is connected to the first fixing part. The second fixing member 274 includes a second fixing strip 2744 and a second fixing piece 2745 disposed on the outer wall of the second fixing strip 2744. A second guide groove 2740 is disposed on one end face of the second fixing strip 2744 and extends along the Y-axis to the opposite end face near the second fixing strip 2744. The second fixing piece 2745 can be connected to the second fixing part of the first housing 22 by, but not limited to, snap-fitting, screwing, gluing or welding. In this embodiment, the second fixing piece 2745 is provided with a second fixing post 2746, which is used to snap-fit ​​to the second fixing hole 2253 of the second fixing part. Further, the second fixing piece 2745 is provided with a second through hole 2747, and the locking fastener passes through the second through hole 2747 and is connected to the second fixing part. The first fixing member 272 has a first through hole 2728 communicating with the first guide groove 2720 at one end away from the first outlet 2721. Specifically, the first through hole 2728 is located in the middle of the end face of the first fixing member 272 away from the first outlet 2721, and the first through hole 2728 extends along the Y-axis direction to communicate with the first guide groove 2720. The second fixing member 274 has a second through hole 2748 communicating with the second guide groove 2740 at one end away from the second outlet 2741. Specifically, the second through hole 2748 is located in the middle of the end face of the second fixing member 274 away from the second outlet 2741, and the second through hole 2748 extends along the Y-axis direction to communicate with the second guide groove 2740.

[0053] The first locking element 282 further includes a first guide strip 2823 slidably connected to the first fixing member 272. One end of the first guide strip 2823 is connected to the first locking tongue 2821. A first elastic member 285 is sleeved on the first guide strip 2823. The opposite ends of the first elastic member 285 abut against the first locking tongue 2821 and the first fixing member 272, respectively, so that the first locking tongue 2821 moves and resets relative to the first fixing member 272. The second locking element 284 further includes a second guide strip 2843 slidably connected to the second fixing member 274. One end of the second guide strip 2843 is connected to the second locking tongue 2841. A second elastic member 286 is sleeved on the second guide strip 2843. The opposite ends of the second elastic member 286 abut against the second locking tongue 2841 and the second fixing member 274, respectively, so that the second locking tongue 2841 moves and resets relative to the second fixing member 274. The first guide strip 2823 is slidably inserted into the first through hole 2728 along the first direction (i.e., the Y-axis direction), and the second guide strip 2843 is slidably inserted into the second through hole 2748 along the first direction (i.e., the Y-axis direction). In this embodiment, the first guide strip 2823 is a cylinder, extending along the Y-axis direction, with one end connected to the middle of one end face of the first latch 2821, and the diameter of the first guide strip 2823 is less than or equal to the inner diameter of the first through hole 2728; the first guide strip 2843 is a cylinder, extending along the Y-axis direction, with one end connected to the middle of one end face of the second latch 2841, and the diameter of the second guide strip 2843 is less than or equal to the inner diameter of the second through hole 2748.

[0054] The first guide groove 2720 can be, but is not limited to, a rectangular groove, a circular groove, or a polygonal groove, etc., and the first locking tongue 2821 corresponding to the first guide groove 2720 can be, but is not limited to, a rectangular block, a circular column, or a polygonal block, etc.; the second guide groove 2740 can be, but is not limited to, a rectangular groove, a circular groove, or a polygonal groove, etc., and the second locking tongue 2841 corresponding to the second guide groove 2740 can be, but is not limited to, a rectangular block, a circular column, or a polygonal block, etc. In this embodiment, the first guide groove 2720 is a rectangular groove extending along the Y-axis direction, and the first locking tongue 2821 is a rectangular block; the second guide groove 2740 is a rectangular groove extending along the Y-axis direction, and the second locking tongue 2841 is a rectangular block.

[0055] The first locking component 282 also includes a first connecting portion 2825 connected to the end of the first guide rail 2823 opposite to the first locking tongue 2821, and the first connecting portion 2825 can extend into a first fixing member 272. The second locking component 284 also includes a second connecting portion 2845 connected to the end of the second guide rail 2843 opposite to the second locking tongue 2841, and the second connecting portion 2845 can extend into a second fixing member 274. In this embodiment, the first connecting part 2825 is a first connecting block protruding from the end face of the first guide rail 2823 away from the end face of the first locking tongue 2821. The first connecting part 2825 is provided with a first connecting hole 2826. Specifically, the first connecting hole 2826 passes through the first connecting part 2825 along the X-axis direction. The second connecting part 2845 is a second connecting block protruding from the end face of the second guide rail 2843 away from the end face of the second locking tongue 2841. The second connecting part 2845 is provided with a second connecting hole 2846. Specifically, the second connecting hole 2846 passes through the second connecting part 2845 along the X-axis direction. The locking assembly 28 further includes a first movable member 287 and a second movable member 288. The first movable member 287 is connected to the first connecting portion 2825, and the second movable member 288 is connected to the second connecting portion 2845. Specifically, the first locking member 282 is slidably accommodated in the first guide groove 2720 of the first fixing member 272 along the Y-axis direction. The first elastic member 285 is sleeved on the first guide strip 2823. The first connecting portion 2825 passes through the first through hole 2728, protrudes from the first fixing member 272, and is then connected to the first movable member 287. The second locking member 284 is slidably accommodated in the second guide groove 2740 of the second fixing member 274 along the Y-axis direction. The second elastic member 286 is sleeved on the second guide strip 2843. The second connecting portion 2845 passes through the second through hole 2748, protrudes from the second fixing member 274, and is then connected to the second movable member 288. The first moving member 287 abuts against the first fixed member 272 under the drive of the first spring member 285, and the second moving member 288 abuts against the second fixed member 274 under the drive of the second elastic member 286.

[0056] The first connecting part 2825 and the first moving part 287, and the second connecting part 2845 and the second moving part 288, can be connected by means of, but not limited to, snap-fit, screw-fit, or adhesive bonding. In this embodiment, the first moving part 287 and the first locking part 282 are fixedly connected by the cooperation of the connecting part and the fixing hole. Specifically, the first moving part 287 includes a first rectangular block 2870, and the first moving part 287 has a first fixing hole 2871 corresponding to the first through hole 2728. That is, the surface of the first rectangular block 2870 facing the first through hole 2728 has the first fixing hole 2871, and the first connecting part 2825 is connected to the first fixing hole 2871. The second moving part 288 includes a second rectangular block 2880, and the second moving part 288 has a second fixing hole 2881 corresponding to the second through hole 2748. That is, the surface of the second rectangular block 2880 facing the second through hole 2748 has the second fixing hole 2881, and the second connecting part 2845 is connected to the second fixing hole 2881. Preferably, the side of the first moving member 287 is provided with a first locking hole 2872 communicating with the first fixing hole 2871, and the side of the second moving member 288 is provided with a second locking hole 2882 communicating with the second fixing hole 2881; the first moving member 287 further includes a first locking post 2874, which is used to pass through the first locking hole 2872 and connect to the first connecting part 2825; the second moving member 288 further includes a second locking post 2884, which is used to pass through the second locking hole 2882 and connect to the second connecting part 2845.

[0057] In some embodiments, the surface of the first movable member 287 facing the first through hole 2728 has a protruding first connecting portion, and the end face of the first guide strip 2823 facing the first connecting portion has a first fixing hole. The first connecting portion is engaged with the first fixing hole so that the first locking fastener 282 is connected to the first movable member 287. The surface of the second movable member 288 facing the second through hole 2748 has a protruding second connecting portion, and the end face of the second guide strip 2843 facing the second connecting portion has a second fixing hole. The second connecting portion is engaged with the second fixing hole so that the second locking fastener 284 is connected to the second movable member 288.

[0058] like Figure 10 and Figure 11As shown, the shape memory alloy component 29 also includes a first positioning part 293 and a second positioning part 295, which are respectively connected to opposite ends of the shape memory metal wire 291. In this embodiment, the first positioning part 293 is detachably connected to the first moving part 287, and the second positioning part 295 is detachably connected to the second moving part 288. The first positioning part 293 and the first moving part 287 can be fixedly connected by, but not limited to, snap-fitting, screwing, gluing, or welding. The first positioning part 293 and the first moving part 287 are connected via a first locking block and a first fixing hole, and / or, the first positioning part 293 and the first moving part 287 are connected via a first locking hole and a first locking fastener; specifically, the first positioning part 293 is provided with a first locking block 2875, and the first positioning part 293 corresponds to the first fixing hole 2932 of the first locking block 2875, and the first locking block 2875 is engaged with the first fixing hole 2932; and / or, the first moving part 287 is provided with a first locking hole 2876, and the first positioning part 293 corresponds to the first locking hole 2876 with a first locking fastener 2934, and the first locking fastener 2934 is locked in the first locking hole 2876 so that the first positioning part 293 is fixedly connected to the first moving part 287. The second positioning part 295 and the second moving part 288 can be fixedly connected by, but not limited to, snap-fitting, screwing, gluing, or welding. The second positioning part 295 and the second moving part 288 are connected by a second locking block and a second fixing hole, and / or the second positioning part 295 and the second moving part 288 are connected by a second locking hole and a second locking fastener; specifically, the second positioning part 295 is provided with a second locking block 2885, the second positioning part 295 is provided with a second fixing hole 2952 corresponding to the second locking block 2885, and the second locking block 2885 is engaged with the second fixing hole 2952; and / or, the second moving part 288 is provided with a second locking hole 2886, the second positioning part 295 is provided with a second locking fastener 2954 corresponding to the second locking hole 2886, and the second locking fastener 2954 is locked in the second locking hole 2886 so that the second positioning part 295 is fixedly connected to the second moving part 288.

[0059] Preferably, the side of the first rectangular block 2870 away from the first locking fastener 282 is provided with a first receiving groove 2877, and the first positioning part 293 includes a first positioning piece 2931 and a first connecting piece 2933 connected to the first positioning piece 2931. The first positioning piece 2931 is accommodated in the first receiving groove 2877, the first fixing hole 2932 is provided in the first positioning piece 2931, and the end of the memory metal wire 291 is connected to the first connecting piece 2933. The side of the second rectangular block 2880 away from the second locking fastener 284 is provided with a second receiving groove 2887, and the second positioning part 295 includes a second positioning piece 2951 and a second connecting piece 2953 connected to the second positioning piece 2951. The second positioning piece 2951 is accommodated in the second receiving groove 2887, the second fixing hole 2952 is provided in the second positioning piece 2951, and the end of the memory metal wire 291 is connected to the second connecting piece 2953.

[0060] In other embodiments, the first moving member 287 and the second moving member 288 may be omitted, the first positioning part 293 is detachably connected to the first locking member 282, and the second positioning part 295 is detachably connected to the second locking member 284.

[0061] like Figure 10 As shown, the first fixing member 272 has a first stop portion 2723 on the inner wall of the first guide groove 2720, which is used to stop the first locking member 282 from moving towards the end close to the memory metal wire 291; the second fixing member 274 has a second stop portion 2743 on the inner wall of the second guide groove 2740, which is used to stop the second locking member 284 from moving towards the end close to the memory metal wire 291. In this embodiment, a first stop strip is provided at one end of the inner wall of the first guide groove 2720 near the first through hole 2728. The first locking tongue 2821 can slide along the Y-axis at one end of the first guide groove 2720 away from the first through hole 2728 until the end face of the first locking tongue 2821 near the first guide strip 2823 stops at the first stop portion 2723 (i.e., the first stop strip), so as to prevent the first locking tongue 2821 from continuing to slide towards the end near the first through hole 2728. A second stop strip is provided at one end of the inner wall of the second guide groove 2740 near the second through hole 2748. The second locking tongue 2841 can slide along the Y-axis at one end of the second guide groove 2740 away from the second through hole 2748 until the end face of the second locking tongue 2841 near the second guide strip 2843 stops at the second stop portion 2743 (i.e., the second stop strip), so as to prevent the second locking tongue 2841 from continuing to slide towards the end near the second through hole 2748.

[0062] In some embodiments, the first fixing member 272 has a first stop groove at one end of the inner wall of the first guide groove 2720 away from the first through hole 2728. The first stop groove extends along the Y-axis to the middle of the first fixing member 272. The first locking tongue 2821 has a first stop strip corresponding to the first stop groove. When the first locking tongue 2821 slides in the first guide groove 2720 along the Y-axis, the first stop strip is slidably accommodated in the first stop groove until the first stop strip stops at the end face of the first stop groove near the first through hole 2728, thereby preventing the first locking tongue 2821 from continuing to move closer to the first through hole 2728. The second fixing member 274 has a second stop groove at the end of the inner wall of the second guide groove 2740 away from the second through hole 2748. The second stop groove extends along the Y-axis to the middle of the second fixing member 274. The second locking tongue 2841 has a second stop strip corresponding to the second stop groove. When the second locking tongue 2841 slides in the second guide groove 2740 along the Y-axis, the second stop strip is slidably accommodated in the second stop groove until the second stop strip stops at the end face of the second stop groove near the second through hole 2748, so as to prevent the second locking tongue 2841 from continuing to slide towards the end near the second through hole 2748.

[0063] In this invention, the first elastic element 285 is a first spring that can be sleeved on the first guide strip 2823, and the second elastic element 286 is a second spring that can be sleeved on the second guide strip 2843.

[0064] Please refer to the following: Figures 8-13When assembling the self-locking mechanism 26, the first elastic element 285 is sleeved on the first guide strip 2823, and the first elastic element 285 and the first guide strip 2823 are inserted into the first guide groove 2720 from the first outlet 2721, so that the first connecting part 2825 passes through the first through hole 2728 of the first fixing member 272 and is exposed; the first connecting part 2825 is inserted into the first fixing hole 2871 of the first moving member 287, so that the first connecting hole 2826 is aligned with the first locking hole 2872; the first locking pin 2874 is inserted into the first locking hole 2872 and the first connecting hole 2826; at this time, the first... An elastic member 285 abuts against the first locking tongue 2821 and the first fixing strip 2724 at opposite ends around the first through hole 2728, causing the first moving member 287 to abut against the end face of the first fixing strip 2724 away from the first outlet 2721; a second elastic member 286 is fitted onto the second guide strip 2843, and the second elastic member 286 and the second guide strip 2843 are inserted into the second guide groove 2740 from the second outlet 2741, so that the second connecting part 2845 passes through the second through hole 2748 of the second fixing member 274 and is exposed; the second connecting part 2845 is inserted into the second moving member 288. In the second fixing hole 2881, the second connecting hole 2846 is aligned with the second locking hole 2882; the second locking pin 2884 is inserted into the second locking hole 2882 and the second connecting hole 2846; at this time, the two opposite ends of the second elastic member 286 abut against the second locking tongue 2841 and the second fixing strip 2744 around the second through hole 2748, so that the second moving member 288 abuts against the end face of the second fixing strip 2744 away from the second outlet 2741; the first positioning piece 2931 of the first positioning part 293 is accommodated in the first receiving groove 2877 of the first moving member 287, so that the first locking block 2884... The first positioning part 293 is fixedly connected to the first moving part 287 by engaging the first fixing hole 2932 of the first positioning piece 2931 and locking the first locking fastener 2934 in the first locking hole 2876; the second positioning piece 2951 of the second positioning part 295 is accommodated in the second receiving groove 2887 of the second moving part 288, the second locking block 2885 is engaged with the second fixing hole 2952 of the second positioning piece 2951 and locking the second locking fastener 2954 in the second locking hole 2886, so that the second positioning part 295 is fixedly connected to the second moving part 288.

[0065] Please refer to the following: Figures 1-7 and Figure 14When assembling the electronic device 100, the self-locking mechanism 26 is installed onto the first housing 22. Specifically, the first fixing member 272 of the self-locking mechanism 26 is attached to the first fixing part of the first housing 22, so that the first fixing post 2726 of the first fixing member 272 is engaged in the first fixing hole 2251, and the locking fastener passes through the first through hole 2727 and is locked into the locking hole of the first fixing part, so that the first fixing member 272 is fixedly connected to the first housing 22; the second fixing member 274 of the self-locking mechanism 26 is attached to the second fixing part of the first housing 22, so that the second fixing post 2746 of the second fixing member 274 is engaged in the second fixing hole 2253, and the locking fastener passes through the second through hole 2747 and is locked into the locking hole of the second fixing part, so that the second fixing member 274 is fixedly connected to the first housing 22. At this time, the memory metal wire 291 is straightened, the first locking tongue 2821 of the first locking fastener 282 extends out of the first fixing member 272 and faces one of the first end walls 223, and the second locking tongue 2841 of the second locking fastener 284 extends out of the second fixing member 274 and faces the other first end wall 223; the side of the second housing 24 away from the second side wall 244 is inserted into the first receiving space 227 of the first housing 22, so that the two guide strips 2430 of the second housing 24 are slidably inserted into the two guide grooves 2230 respectively, and the guide rail 228 is slidably accommodated in the corresponding guide groove 246, and the memory alloy part 29 is electrically connected to the power supply 40. At this time, the first locking tongue 2821 and the second locking tongue 2841 are respectively inserted into the first locking port 2414 and the second locking port 2415 on the side furthest from the second side wall 244, and the first housing 22 and the second housing 24 are in a fully unfolded state; the main board 30 can control the drive unit 80 to drive the second housing 24 to slide relative to the first housing 22 in the X-axis direction. The back of the sliding area 64 of the flexible screen 60 is attached to the front of the support device 50. The positioning area 62 of the flexible screen 60 is housed in the positioning groove 2210 of the first housing 22, and the back of the positioning area 62 is fixedly attached to the front of the top wall 221. One side of the flexible screen 60 is snapped into the connecting groove 2240 of the first housing 22. The side of the support device 50 away from the flexible screen 60 is wrapped around the second housing 24. The side of the support device 50 near the positioning area 62 is connected to the first housing 22, and the side of the support device 50 away from the positioning area 62 is on the bottom wall 241 of the second housing 24, so that the support device 50 and the flexible screen 60 can slide around the second housing 24.At this time, when the power supply 40 is energized and the shape memory alloy part 29 is powered on, the shape memory metal wire 291 is heated and shrinks, driving the first locking member 282 and the second locking member 284 to slide in the first guide groove 2720 of the first fixing member 272 and the second guide groove 2740 of the second fixing member 274 respectively, so that the first locking member 282 and the second locking member 284 come closer to each other, so that the first locking tongue 2821 and the second locking tongue 2841 disengage from the first locking port 2414 and the second locking port 2415 respectively, the first elastic member 285 and the second elastic member 286 are compressed, the second housing 24 is in an unlocked state from the first housing 22, and the second housing 24 can move relative to the first housing 22 in the X-axis direction.

[0066] When the flexible screen 60 of the electronic device 100 is fully rolled up, the power supply 40 and the memory metal wire 291 are in a de-energized state, the memory metal wire 291 is in a reset state, the first elastic member 285 elastically pushes the first locking member 282 to make the first locking tongue 2821 insert into the corresponding first locking port 2414, and at the same time, the second elastic member 286 elastically pushes the second locking member 284 to make the second locking tongue 2841 insert into the corresponding second locking port 2415, preventing the second housing 24 from being relative to the first housing 22. The two stop parts 2255 are respectively positioned in the two stop grooves 2443. When the power supply 40 and the memory metal wire 291 are energized, the memory metal wire 291 retracts to drive the first locking tongue 2821 and the second locking tongue 2841 to disengage from the corresponding first locking port 2414 and the second locking port 2415, so as to facilitate the retraction of the second housing 24 relative to the first housing 22. The first elastic member 285 and the second elastic member 286 are compressed. When the flexible screen 60 of the electronic device 100 is fully unfolded, the memory metal wire 291 is de-energized and returns to its original length. The first elastic member 285 elastically pushes against the first locking member 282, causing the first locking tongue 2821 to insert into the corresponding first locking port 2414. At the same time, the second elastic member 286 elastically pushes against the second locking member 284, causing the second locking tongue 2841 to insert into the corresponding second locking port 2415, so as to prevent the second housing 24 from being relative to the first housing 22. When the power supply 40 is energized and the memory metal wire 291 is powered on, the memory metal wire 291 is heated and contracts to drive the first locking tongue 2821 and the second locking tongue 2841 to disengage from the corresponding first locking port 2414 and the second locking port 2415, respectively, so as to facilitate the unfolding of the second housing 24 relative to the first housing 22.

[0067] Please refer to the following: Figures 1-5 and Figures 14-16When the flexible screen 60 of the electronic device 100 needs to be unfolded or rolled up, the motherboard 30 controls the power supply 40 to energize the memory metal wire 291. The memory metal wire 291 heats up and contracts, causing the first locking fastener 282 and the second locking fastener 284 to come closer to each other, causing the first locking tongue 2821 and the second locking tongue 2841 to disengage from the first locking port 2414 and the second locking port 2415, and the second housing 24 and the first housing 22 are in an unlocked state. At this time, the motherboard 30 controls the drive unit 80 to push or pull the second housing 24 to slide along the X-axis, so that the second housing 24 moves away from or closer to the first housing 22. The second housing 24 slides relative to the support device 50, causing the support device 50 to unfold or roll up, and the support device 50 slides around the second housing 24. The rolling area 64 unfolds or rolls up with the support device 50.

[0068] In one embodiment, the travel detection device 70 may be a distance sensor used to detect the position of the second housing 24 relative to the first housing 22. When the flexible screen 60 needs to be unfolded, the main board 30 controls the power supply 40 to energize the memory metal wire 291. The memory metal wire 291 is heated and shrinks to drive the first locking fastener 282 and the second locking fastener 284 to move closer to each other, so that the first locking tongue 2821 and the second locking tongue 2841 disengage from the first locking port 2414 and the second locking port 2415. The main board 30 controls the drive unit 80 to drive the second housing 24 to slide relative to the first housing 22, so that the second housing 24 and the first housing 22 unfold relative to each other, so that the support device 50 slides around the second housing 24, and the sliding roll area 64 unfolds with the support device 50. The stroke detection device 70 detects the position of the second housing 24 relative to the first housing 22. When the second housing 24 moves to the position that needs to be locked relative to the first housing 22, the stroke detection device 70 detects the position of the second housing 24 and calculates the corresponding positions of the first locking port 2414 and the second locking port 2415. Then, it sends a signal to the main board 30. The main board 30 receives the signal and controls the power supply 40 and the shape memory alloy component 29 to be de-energized, so that the shape memory alloy component 29 returns to its original length. The main board 30 controls the drive component 80 to stop driving the second housing 24, that is, the second housing 24 does not move relative to the first housing 22. The first elastic component 285 and the second elastic component 286 respectively push the first locking tongue 2821 and the second locking tongue 2841 away from each other until the first locking tongue 2821 and the second locking tongue 2841 are respectively inserted into the first locking port 2414 and the second locking port 2415, so that the second housing 24 and the first housing 22 are positioned relative to each other. When the second housing 24 needs to unfold relative to the first housing 22 again, the main board 30 controls the power supply 40 and the memory metal wire 291 to be energized again, so that the first locking tongue 2821 and the second locking tongue 2841 disengage from the first locking port 2414 and the second locking port 2415 to unlock. The above process is repeated until the second housing 24 is fully unfolded relative to the first housing 22, and the flexible screen 60 is in a fully unfolded state. When the flexible screen 60 needs to be rolled up, the main board 30 controls the power supply 40 to energize the memory metal wire 291. The memory metal wire 291 is heated and shrinks to drive the first locking fastener 282 and the second locking fastener 284 to move closer to each other, so that the first locking tongue 2821 and the second locking tongue 2841 disengage from the first locking port 2414 and the second locking port 2415. The main board 30 controls the drive unit 80 to drive the second housing 24 to slide relative to the first housing 22, so that the second housing 24 and the first housing 22 move closer to each other, so that the support device 50 rolls around the second housing 24, and the rolling area 64 rolls up with the support device 50.The stroke detection device 70 detects the position of the second housing 24 relative to the first housing 22. When the second housing 24 moves to the position that needs to be locked relative to the first housing 22, the stroke detection device 70 detects the position of the second housing 24 and calculates the corresponding positions of the first locking port 2414 and the second locking port 2415. Then, it sends a signal to the main board 30. The main board 30 receives the signal and controls the power supply 40 and the memory alloy component 29 to be de-energized, so that the memory alloy component 29 returns to its original length. The main board 30 controls the drive component 80 to stop driving the second housing 24. The first elastic component 285 and the second elastic component 286 push the first locking tongue 2821 and the second locking tongue 2841 away from each other until the first locking tongue 2821 and the second locking tongue 2841 are inserted into the first locking port 2414 and the second locking port 2415 respectively. When the second housing 24 needs to move closer to the first housing 22 again, the main board 30 controls the power supply 40 and the memory metal wire 291 to be powered on again, so that the first locking tongue 2821 and the second locking tongue 2841 disengage from the first locking port 2414 and the second locking port 2415 to unlock. The above process is repeated until the second housing 24 is completely retracted relative to the first housing 22 and the flexible screen 60 is in a completely rolled-up state.

[0069] In another embodiment, during the movement of the second housing 24 relative to the first housing 22, the stroke detection device 70 detects the position of the second housing 24 relative to the first housing 22 and calculates the time required for the second housing 24 to move to the locked position relative to the first housing 22. The stroke detection device 70 sends a signal to the main board 30, which receives the signal and controls the power supply 40 and the shape memory alloy component 29 to be powered off in advance. The shape memory alloy component 29 gradually resets, and the first elastic element 285 and the second elastic element 286 respectively push against the first locking tongue 2821 and the second locking tongue 2822. 841 move away from each other, while the second housing 24 continues to move relative to the first housing 22. When the first locking tongue 2821 and the second locking tongue 2841 are respectively aligned with the corresponding first locking port 2414 and second locking port 2415, the main board 40 controls the drive unit 80 to stop driving the second housing 24 to move relative to the first housing 22. The first locking tongue 2821 and the second locking tongue 2841 are inserted into the first locking port 2414 and the second locking port 2415 respectively, and the second housing 24 is locked to 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 relative to the first housing 22 again, the memory metal wire 291 is energized again to unlock, and the above process is repeated. The other embodiment can improve the locking response time of the self-locking mechanism 26.

[0070] Because the first fixing member 272 of the self-locking mechanism 26 is provided with a first stop portion 2723 and the second fixing member 274 is provided with a second stop portion 2743, the first locking tongue 2821 can slide in the first guide groove 2720 and stop at the first stop portion 2723, and the second locking tongue 2841 can slide in the second guide groove 2740 and stop at the second stop portion 2743; therefore, when the memory metal wire 291 is energized, the memory metal wire 291 is heated and contracts to drive the first locking tongue 2821 in the first guide groove 2720. The sliding groove 2720 and the second locking tongue 2841 slide in the second guide groove 2740, and the first locking tongue 2821 and the second locking tongue 2841 stop at the first stop part 2723 and the second stop part 2743 respectively, so as to ensure that the contraction of the memory metal wire 291 at both ends can reach the maximum position, and prevent the situation where the contraction displacement of one end of the memory metal wire 291 is too large, while the other end of the memory metal wire 291 does not contract or the contraction displacement is not in place, resulting in the other end of the self-locking mechanism 26 being unable to unlock. Because the self-locking mechanism 26 is equipped with a first stop part 2723 and a second stop part 2743, the memory metal wire 291 may get stuck during the energized contraction process. This "getting stuck" occurs when the memory metal wire 291 has reached its limit of contraction in its travel space, but the power supply 40 continues to energize it. In this situation, the mainboard 30 needs to control and prevent the memory metal wire 291 from getting stuck. Specifically, this can be achieved by real-time detection of the resistance value of the memory metal wire 291. The stuck state is detected based on changes in the resistance value. When the detected resistance value reaches a specific value, the mainboard 30 controls the power supply 40 to reduce the current to the memory metal wire 291 to maintain this state or directly cuts off the power. The specific value refers to the resistance value of the memory metal wire 291 when it has reached its limit of contraction in its travel space.

[0071] In this invention, the mainboard 30 of the electronic device 100 controls the drive component 80 to drive the second housing 24 to move relative to the first housing 22, thereby achieving automatic unfolding or retraction of the housing 20. The sliding area 64 of the flexible screen 60 automatically unfolds or rolls up with the second housing 24, making it convenient to use. When the sliding area 64 is unfolded, it increases the display surface of the flexible screen 60, making it more convenient for users. When the sliding area 64 is rolled up, it reduces the size of the electronic device 100, making it easier for users to carry. In addition, after the second housing 24 is unfolded relative to the first housing 22, it is automatically locked by the self-locking mechanism 26 to prevent the second housing 24 from moving relative to the first housing 22. This prevents the second housing 24 from moving relative to the first housing 22 when the electronic device 100 is dropped, effectively protecting it. The self-locking mechanism 26 protects the entire electronic device 100, preventing damage to the flexible screen 60 and the internal structure of the housing 20. Secondly, the self-locking mechanism 26 automatically unlocks or automatically locks by energizing the memory metal wire 291 or de-energizing it. The logic is simple and it can achieve multi-level self-locking or unlocking. The memory metal wire 291 has a large energy density, driving strain, and driving stress. Moreover, the driving voltage required for the memory metal wire 291 is low and readily available. Furthermore, the self-locking mechanism 26 is lightweight and compact, occupying little internal space in the housing 20, which facilitates the layout of other components. In addition, the self-locking mechanism 26 of this invention uses only one memory metal wire 291, which significantly reduces the current required compared to using two or more memory metal wires, and also significantly reduces the power consumption.

[0072] Please refer to the following: Figures 17-18In the second embodiment of the present invention, the structure of the housing assembly 20a of the electronic device is similar to that of the housing assembly 20 in the first embodiment. The difference is that the structure of the self-locking mechanism 26a is slightly different from that of the self-locking mechanism 26. Specifically, the self-locking mechanism 26a omits the fixing member, locking member and elastic member at one end of the shape memory alloy part 29 based on the self-locking mechanism 26 in the first embodiment. Specifically, the second fixing member, second locking member, and second elastic member at one end of the shape memory alloy component 29 of the self-locking mechanism 26a can be omitted. That is, the self-locking mechanism 26a only includes the first fixing member 272, the first locking member 282, and the first elastic member. The first locking member 282 is movably connected to the first fixing member 272 along the first direction (i.e., the Y-axis direction). One end of the shape memory metal wire 291 is connected to the first locking member 282, and the other end of the shape memory metal wire 291 is fixedly connected to the first housing 22 through the positioning block 297. The shape memory alloy component 29 is energized or de-energized to drive the first locking member 282 to move relative to the first fixing member 272, so that the first locking tongue 2821 disengages from or locks onto the second housing 24 and the first housing 22. Specifically, when the memory metal wire 291 is powered on, it contracts to move the first locking member 282 relative to the first fixing member 272 along the first direction, causing the first locking tongue 2821 to disengage from the first locking port 2414, the first elastic member to be compressed and deformed, and the second housing 24 to move relative to the first housing 22 along the X-axis. When the memory metal wire 291 is de-powered, it returns to its original length, the first elastic member elastically resets and pushes the first locking member 282 to move and reset, so that the first locking tongue 2821 is inserted into the first locking port 2414, and the second housing 24 cannot move relative to the first housing 22, that is, the second housing 24 cannot move relative to the first housing 22 along the X-axis.

[0073] In some embodiments, the first fixing member 272, the first locking member 282, and the first elastic member 285 at one end of the shape memory alloy member 29 of the self-locking mechanism can be omitted. That is, the self-locking mechanism 26 only includes the second fixing member 274, the second locking member 284, and the second elastic member 286. The second locking member 284 is movably connected to the second fixing member 274 along the first direction (i.e., the Y-axis direction). One end of the shape memory metal wire 291 is connected to the second locking member 284, and the other end of the shape memory metal wire 291 is fixedly connected to the first housing 22. The shape memory metal wire 291 is energized or de-energized to drive the second locking member 284 to move relative to the second fixing member 274, so that the second locking tongue 2841 disengages from or locks onto the second housing 24 and the first housing. Between 22; specifically, when the memory metal wire 291 is energized, the memory metal wire 291 contracts to drive the second locking member 284 to move relative to the second fixing member 274 in the first direction, so that the second locking tongue 2841 disengages from the second locking port 2415, the second elastic member is compressed and deformed, and the second housing 24 can move relative to the first housing 22 in the X-axis direction; when the memory metal wire 291 is de-energized, the memory metal wire 291 returns to its original length, the second elastic member elastically resets and pushes the second locking member 284 to move and reset, so that the second locking tongue 2841 is inserted into the second locking port 2415, and the second housing 24 cannot move relative to the first housing 22, that is, the second housing 24 cannot move relative to the first housing 22 in the X-axis direction.

[0074] In some embodiments, the self-locking mechanism may also include a first fixing member 272, a first locking member 282, a first elastic member 285, a second fixing member 274, a second locking member 284, a second elastic member 286, and two shape memory alloy members 29. The first locking member 282 is movably connected to the first fixing member 272 along a first direction. One end of one shape memory alloy member 29 is connected to the first locking member 282, and the opposite end of the shape memory alloy member 29 is connected to the first housing 22. The energization or de-energization of the shape memory alloy member 29 drives the first locking member 285. 82 moves relative to the first fixing member 272 to disengage or lock the first locking tongue 2821 into the first locking port 2414; the second locking member 284 is movably connected to the second fixing member 274 along the first direction; one end of another shape memory alloy member 29 is connected to the second locking member 284, and the other end of the other shape memory alloy member 29 is connected to the first housing 22; the energization or de-energization of the other shape memory alloy member 29 drives the second locking member 284 to move relative to the second fixing member 274 to disengage or lock the second locking tongue 2841 into the second locking port 2415. Preferably, the two shape memory alloy components 29 are simultaneously energized to drive the first locking member 282 and the second locking member 284 to retract synchronously into the first fixing member 272 and the second fixing member 274, respectively, so that the first locking tongue 2821 and the second locking tongue 2841 are synchronously disengaged from the first locking port 2414 and the second locking port 2415, respectively; the two shape memory alloy components 29 are simultaneously de-energized to drive the first locking member 282 and the second locking member 284 to extend synchronously out of the first fixing member 272 and the second fixing member 274, respectively, so that the first locking tongue 2821 and the second locking tongue 2841 are synchronously inserted into the first locking port 2414 and the second locking port 2415, respectively.

[0075] Please refer to the following: Figures 19-25In the third embodiment of the present invention, the structure of the housing assembly 20b of the electronic device is similar to that of the housing assembly 20 in the first embodiment. The difference is that the structure of the self-locking mechanism 26b is slightly different from that of the self-locking mechanism 26. Specifically, the self-locking mechanism 26b adds two third elastic members 296 to the self-locking mechanism 26 in the first embodiment. One third elastic member 296 is connected to one end of the memory metal wire 291 and the first locking fastener 282 at opposite ends, and the other third elastic member 296 is connected to the other end of the memory metal wire 291 and the second locking fastener 284 at opposite ends. In this embodiment, one end of a third elastic member 296 facing away from the memory metal wire 291 is connected to the first locking member 282 via the first positioning part 293 and the first moving part 287, and the other end of a third elastic member 296 facing away from the memory metal wire 291 is connected to the second locking member 284 via the second positioning part 295 and the second moving part 288; preferably, one end of a third elastic member 296 is welded to one end of the memory metal wire 291 and the end of the first positioning part 293 facing away from the first rectangular block 2870, respectively, and the other end of a third elastic member 296 is welded to the other end of the memory metal wire 291 and the end of the second positioning part 295 facing away from the second rectangular block 2880, respectively. When the power supply 40 energizes the memory metal wire 291, the contraction of the memory metal wire 291 generates a contraction force that acts on the third elastic member 296. Through the two third elastic members 296, the force is applied to the first locking member 282 and the second locking member 284 respectively through the first positioning part 293 and the second positioning part 295. The first elastic member 285 and the second elastic member 286 are compressed, causing the first locking tongue 2821 and the second locking tongue 2841 to disengage from the first locking port 2414 and the second locking port 2415 respectively, so as to realize the automatic unlocking of the self-locking mechanism 26b. The second housing 24 and the first housing 22 can move relative to each other. When the power supply 40 stops energizing the memory metal wire 291, the memory metal wire 291 returns to its original length and extends towards the opposite end. The two third elastic elements 296, the first elastic element 285 and the second elastic element 286 all elastically reset. The first elastic element 285 and the second elastic element 286 respectively push the first locking member 282 and the second locking member 284 away from each other, so that the first locking tongue 2821 and the second locking tongue 2841 are respectively inserted into the first locking port 2414 and the second locking port 2415, so as to realize the automatic locking of the self-locking mechanism 26b and prevent the second housing 24 from moving relative to the first housing 22.Preferably, when the power supply 40 energizes the memory metal wire 291, the memory metal wire 291 retracts, and the first locking tongue 2821 and the second locking tongue 2841 simultaneously disengage from the corresponding first locking port 2414 and the second locking port 2415, thereby unlocking the self-locking mechanism 26b; when the power supply 40 and the memory metal wire 291 are de-energized, the memory metal wire 291 returns to its original length, and the first locking tongue 2821 and the second locking tongue 2841 simultaneously insert into the corresponding first locking port 2414 and the second locking port 2415, thereby locking the self-locking mechanism 26b.

[0076] The elastic coefficient of the third elastic element 296 is greater than that of the first elastic element 285 and the second elastic element 286. In this embodiment, the first elastic element 285 and the second elastic element 286 are springs with the same elastic coefficient, and the third elastic element 296 is a tension spring; the elastic coefficient of the third elastic element 296 is KB, and the elastic coefficients of the first elastic element 285 and the second elastic element 286 are both KF. When the power supply 40 energizes the memory metal wire 291, one end moves backward along the Y-axis by a displacement of Δx2. The first locking tongue 2821 or the second locking tongue 2841 can move by a displacement of Δx1 along the Y-axis, and their relationship is as follows: The sum of the displacement of the first locking member 282 relative to the first fixing member 272 in the first direction (i.e., the Y-axis direction) and the displacement of the second locking member 284 relative to the second fixing member 274 in the first direction (i.e., the Y-axis direction) is less than the shrinkage of the shape memory alloy part 29. Therefore, the displacement Δx1 of the first locking tongue 2821 or the second locking tongue 2841 is less than the shrinkage Δx2 of the shape memory alloy. To meet the travel of the displacement Δx1 of the first locking tongue 2821 or the second locking tongue 2841, the values ​​of Δx1 and Δx2 are generally made to be relatively close. Otherwise, the shrinkage of the shape memory alloy wire 291 will result in a large loss, where the loss = Δx2 - Δx1. Therefore, when the overall space of the housing 20 is limited, when KB >> KF, the shrinkage loss of the shape memory alloy wire 291 is close to 0.

[0077] When the first locking member 282 and / or the second locking member 284 of the self-locking mechanism 26b are jammed due to external force, even if the power supply 40 continues to energize the memory metal wire 291, the memory metal wire 291 will only compress the third elastic member 296 to provide deformation displacement for the memory metal wire 291. Therefore, the third elastic member 296 has the function of protecting the memory metal wire 291. In this embodiment, by adding third elastic members 296 at opposite ends of the memory metal wire 291, damage to the memory metal wire 291 can be prevented. There is no need to detect and control the jammed state of the memory metal wire 291 through the main board 30, making the application relatively simple and the cost low.

[0078] In other embodiments, the third elastic element 296 may be connected only to one end of the memory metal wire 291. Specifically, the third elastic element 296 may be connected between the first locking fastener 282 and the end of the memory metal wire 291, or between the second locking fastener 284 and the end of the memory metal wire 291.

[0079] Please refer to the following: Figures 26-27 In the fourth embodiment of the present invention, the structure of the housing assembly 20c of the electronic device is similar to that of the housing assembly 20b in the third embodiment. The difference is that the structure of the self-locking mechanism 26c in the fourth embodiment is slightly different from that of the self-locking mechanism 26b in the third embodiment. Specifically, the self-locking mechanism 26c is based on the self-locking mechanism 26b in the third embodiment, omitting the fixing member, locking member and elastic member at one end of the shape memory alloy wire 291. Specifically, the second fixing member, second locking member, second elastic member, and third elastic member at one end of the shape memory alloy part 29 of the self-locking mechanism 26c can be omitted. That is, the self-locking mechanism 26c only includes the first fixing member 272, the first locking member 282, the first elastic member, and the third elastic member 296. The first locking member 282 is movably connected to the first fixing member 272 along the first direction (i.e., the Y-axis direction). One end of the shape memory metal wire 291 is connected to the third elastic member 296, and the other end of the shape memory metal wire 291 is fixedly connected to the first housing 22 through a connecting block. The shape memory alloy part 29 is energized or de-energized to drive the first locking member 282 to move relative to the first fixing member 272, so that the first locking tongue 2821 disengages from or locks between the second housing 24 and the first housing 22. Specifically, when the memory metal wire 291 is powered on, it contracts to move the first locking member 282 relative to the first fixing member 272 along the first direction, causing the first locking tongue 2821 to disengage from the first locking port 2414. The first elastic member and the third elastic member 296 are compressed and deformed, and the second housing 24 can move relative to the first housing 22 along the X-axis. When the memory metal wire 291 is de-energized, it returns to its original length, the third elastic member 296 resets, and the first elastic member resets and pushes the first locking member 282 to move and reset, so that the first locking tongue 2821 is inserted into the first locking port 2414. The second housing 24 cannot move relative to the first housing 22, that is, the second housing 24 cannot move relative to the first housing 22 along the X-axis.

[0080] In some embodiments, the first fixing member 272, the first locking member 282, the first elastic member 285, and the third elastic member 296 at one end of the shape memory alloy member 29 of the self-locking mechanism can be omitted. That is, the self-locking mechanism only includes the second fixing member 274, the second locking member 284, the second elastic member 286, and the third elastic member 296. The second locking member 284 is movably connected to the second fixing member 274 along the first direction (i.e., the Y-axis direction). One end of the shape memory metal wire 291 is connected to the third elastic member 296, and the other end of the shape memory metal wire 291 is fixedly connected to the first housing 22. The shape memory metal wire 291 is energized or de-energized to drive the second locking member 284 to move relative to the second fixing member 274, so that the second locking tongue 2841 disengages from or locks into the second housing 24 and the first housing 22. Specifically, when the memory metal wire 291 is powered on, it contracts to move the second locking member 284 relative to the second fixing member 274 in the first direction, causing the second locking tongue 2841 to disengage from the second locking port 2415. The second and third elastic members 296 are compressed and deformed, and the second housing 24 can move relative to the first housing 22 in the X-axis direction. When the memory metal wire 291 is de-energized, it returns to its original length, the third elastic member 296 resets, and the second elastic member resets and pushes the second locking member 284 to move and reset, so that the second locking tongue 2841 is inserted into the second locking port 2415. The second housing 24 cannot move relative to the first housing 22, that is, the second housing 24 cannot move relative to the first housing 22 in the X-axis direction.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A self-locking mechanism, characterized in that, The self-locking mechanism includes: A fixing component, the fixing component including a first fixing member and a second fixing member; A locking assembly, comprising a first locking member, a first elastic member, a second locking member, a second elastic member, and a third elastic member, wherein the first locking member is movably connected to a first fixed member, the second locking member is movably connected to a second fixed member, the first locking member includes a first latch, the first elastic member has a spring force for driving the first locking member to move and reset relative to the first fixed member, the second locking member includes a second latch, and the second elastic member has a spring force for driving the second locking member to move and reset relative to the second fixed member; and A shape memory alloy component, comprising a shape memory metal wire, wherein a third elastic element is connected between a first locking member and an end of the shape memory metal wire, and the other end of the shape memory metal wire is connected to a second locking member; or wherein the third elastic element is connected between the second locking member and an end of the shape memory metal wire, and the other end of the shape memory metal wire is connected to the first locking member, the shape memory alloy component being used to drive the first locking member to move relative to the first fixing member and the second locking member to move relative to the second fixing member, so that the first locking tongue extends or retracts at the first fixing member and the second locking tongue extends or retracts at the second fixing member.

2. The self-locking mechanism according to claim 1, characterized in that, The contraction or repositioning of the memory metal wire causes the first locking device and the second locking device to move closer to or further apart from each other.

3. The self-locking mechanism according to claim 2, characterized in that, The amount of contraction of the memory metal wire in the first direction is equal to the sum of the displacement of the first lock relative to the first fastener in the first direction and the displacement of the second lock relative to the second fastener in the first direction.

4. The self-locking mechanism according to claim 2, characterized in that, The first fixing member is provided with a first guide groove along a first direction. The first guide groove passes through the end face of the first fixing member away from the memory metal wire to form a first outlet. The first locking member is slidably accommodated in the first guide groove. The first locking tongue extends or retracts in the first outlet under the drive of the memory metal wire. The second fixing member is provided with a second guide groove along the first direction. The second guide groove passes through the end face of the second fixing member away from the memory metal wire to form a second outlet. The second locking member is slidably accommodated in the second guide groove. The second locking tongue extends or retracts in the second outlet under the drive of the memory metal wire.

5. The self-locking mechanism according to claim 4, characterized in that, The shape memory alloy component further includes a first positioning part and a second positioning part, which are respectively connected to opposite ends of the shape memory metal wire. The first positioning part is detachably connected to the first locking fastener, and the second positioning part is detachably connected to the second locking fastener.

6. The self-locking mechanism according to claim 5, characterized in that, The first locking element further includes a first guide strip slidably connected to the first fixing member, one end of the first guide strip being connected to the first latch, and the first elastic member being sleeved on the first guide strip, with its opposite ends abutting against the first latch and the first fixing member respectively; the second locking element further includes a second guide strip slidably connected to the second fixing member, one end of the second guide strip being connected to the second latch, and the second elastic member being sleeved on the second guide strip, with its opposite ends abutting against the second latch and the second fixing member respectively.

7. The self-locking mechanism according to claim 6, characterized in that, The first locking component further includes a first connecting portion connected to the end of the first guide rail opposite to the first latch, the first connecting portion extending out to the first fixing member; the second locking component further includes a second connecting portion connected to the end of the second guide rail opposite to the second latch, the second connecting portion extending out to the second fixing member; the locking assembly further includes a first moving member and a second moving member, the first moving member being connected to the first connecting portion, the second moving member being connected to the second connecting portion, the first positioning portion being detachably connected to the first moving member, the second positioning portion being detachably connected to the second moving member, the first moving member abutting against the first fixing member under the drive of the first elastic member, and the second moving member abutting against the second fixing member under the drive of the second elastic member.

8. The self-locking mechanism according to claim 7, characterized in that, The first fixing member has a first through hole communicating with the first guide groove at one end away from the first outlet. The first guide strip is slidably inserted through the first through hole. The first moving member has a first fixing hole corresponding to the first through hole. The first connecting part is connected to the first fixing hole. The second fixing member has a second through hole communicating with the second guide groove at one end away from the second outlet. The second guide strip is slidably inserted through the second through hole. The second moving member has a second fixing hole corresponding to the second through hole. The second connecting part is connected to the second fixing hole.

9. The self-locking mechanism according to claim 4, characterized in that, The first fixing member has a first stop portion on the inner wall of the first guide groove, which is used to stop the first locking member from moving towards the end closer to the memory metal wire; the second fixing member has a second stop portion on the inner wall of the second guide groove, which is used to stop the second locking member from moving towards the end closer to the memory metal wire.

10. The self-locking mechanism according to claim 2, characterized in that, The locking assembly includes two third elastic members, one of which is connected at opposite ends to one end of the memory metal wire and the first locking element, and the other of which is connected at opposite ends to the other end of the memory metal wire and the second locking element.

11. The self-locking mechanism according to claim 10, characterized in that, The sum of the displacement of the first locking member relative to the first fixing member in the first direction and the displacement of the second locking member relative to the second fixing member in the first direction is less than the shrinkage of the shape memory alloy part.

12. The self-locking mechanism according to claim 10, characterized in that, The elastic coefficient of the third elastic element is greater than that of the first elastic element and the second elastic element.

13. The self-locking mechanism according to claim 1, characterized in that, The first latch and the second latch can extend synchronously from the first fixing member and the second fixing member, respectively, or the first latch and the second latch can retract synchronously into the second fixing member and the second fixing member, respectively.

14. A housing, characterized in that, The housing includes a self-locking mechanism as described in any one of claims 1-13, a first housing, and a second housing. The first housing and the second housing are slidably connected to each other. The first fixing member of the self-locking mechanism is connected to the first housing. The second housing is provided with a first locking port. The first housing and the second housing are in a locked state or an unlocked state. In the locked state, the first locking tongue of the self-locking mechanism is inserted into the first locking port. In the unlocked state, the first locking tongue of the self-locking mechanism is disengaged from the first locking port.

15. The housing according to claim 14, characterized in that, The second housing is provided with a plurality of the first locking ports along a second direction, the second direction being parallel to the sliding direction of the second housing relative to the first housing, and the first locking tongue can be selectively inserted into one of the plurality of the first locking ports.

16. An electronic device, characterized in that, The electronic device includes a housing as described in any one of claims 14-15, a power supply and a motherboard disposed in the housing, the power supply being electrically connected to the motherboard and the shape memory alloy component, and the motherboard being used to control the power supply and the shape memory alloy component to be powered on or off, so as to cause the shape memory alloy component to contract or reset.

17. The electronic device according to claim 16, characterized in that, When the power supply is connected to the shape memory alloy component, the shape memory alloy component retracts to drive the first locking tongue to disengage from the first locking port; when the power supply is disconnected from the shape memory alloy component, the shape memory alloy component resets to allow the first locking tongue to insert into the first locking port.

18. The electronic device according to claim 17, characterized in that, It also includes a travel detection device electrically connected to the motherboard. The travel detection device is used to detect the sliding position of the second housing relative to the first housing. When the second housing slides relative to the first housing to the position that needs to be locked, the travel detection device detects the position of the second housing and sends a signal to the motherboard. The motherboard receives the signal and controls the power supply and the shape memory alloy component to be de-energized. The shape memory alloy component is reset, and the first elastic element pushes the first locking tongue to move until the first locking tongue is inserted into the first locking port.

19. The electronic device according to claim 17, characterized in that, It also includes a travel detection device electrically connected to the motherboard. The travel detection device is used to detect the position of the second housing relative to the first housing and calculate the time required for the second housing to move to the locked position relative to the first housing. The travel detection device sends a signal to the motherboard. The motherboard receives the signal and controls the power supply and the shape memory alloy component to be de-energized. The shape memory alloy component is reset, and the first elastic element pushes the first locking tongue to move. At the same time, the second housing continues to move relative to the first housing until the first locking tongue is directly facing the first locking port, at which point the first locking tongue is inserted into the first locking port.

20. The electronic device according to claim 17, characterized in that, It also includes a driver electrically connected to the motherboard, the motherboard controlling the driver to drive the second housing to move relative to the first housing.

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