CN115459010A

CN115459010A - Locking mechanism, shell and electronic equipment

Info

Publication number: CN115459010A
Application number: CN202211214866.3A
Authority: CN
Inventors: 马强
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-09
Also published as: WO2024066680A1

Abstract

The invention provides a locking mechanism which comprises a first locking component, a first memory alloy component and a circuit board, wherein the first locking component comprises a first fixing piece, a first locking piece and a first resetting piece; the first memory alloy component comprises a first memory alloy piece and a first elastic piece, and the first memory alloy piece is connected with the first elastic piece; the end part, far away from the first elastic part, of the first memory alloy part is connected to the circuit board, the end part, far away from the first memory alloy part, of the first elastic part is connected to the first locking part, and the circuit board controls the first memory alloy part to be used for driving the first locking part to move relative to the first fixing part, so that the first locking tongue extends out of or contracts into the first fixing part. The invention also provides a shell provided with the locking mechanism and electronic equipment provided with the shell.

Description

Locking mechanism, shell and electronic equipment

Technical Field

The present invention relates to the field of electronic devices, and in particular, to a locking mechanism for locking, a housing with the locking mechanism, and an electronic device with the housing.

Background

With the development and application of flexible screens, electronic devices with changeable screen forms, such as folding screen mobile phones, sliding screen mobile phones, and the like, have appeared in the related art. Taking a sliding and rolling screen mobile phone as an example, the sliding and rolling screen mobile phone includes two shells in sliding connection with each other, and a motor is generally adopted to push the two shells to move away from each other or move close to each other, so as to realize the unfolding or sliding and rolling of the sliding and rolling screen. However, in the related art, there is no locking mechanism between the two shells of the sliding and rolling screen mobile phone, so the positioning effect of the sliding and rolling screen in the unfolded state is poor, and if the sliding and rolling screen mobile phone falls, the two shells are rapidly drawn together under the action of external force, which is likely to damage the sliding and rolling screen or the internal mechanism of the sliding and rolling screen mobile phone.

Disclosure of Invention

Embodiments of the present invention provide a locking mechanism, which can automatically lock the first housing and the second housing from moving relative to each other. The invention also provides a shell provided with the locking mechanism and electronic equipment provided with the shell.

The embodiment of the invention provides a locking mechanism, which comprises a first locking component, a first memory alloy component and a circuit board, wherein the first locking component comprises a first fixing piece, a first locking piece and a first resetting piece arranged between the first fixing piece and the first locking piece, the first locking piece is movably connected to the first fixing piece, the first locking piece comprises a first lock tongue, and the first resetting piece has elastic force for driving the first locking piece to move and reset relative to the first fixing piece; the first memory alloy component comprises a first memory alloy piece and a first elastic piece, and the first memory alloy piece is connected with the first elastic piece; the end part, far away from the first elastic part, of the first memory alloy part is connected to the circuit board, and the end part, far away from the first memory alloy part, of the first elastic part is connected to the first locking part, wherein the circuit board controls the first memory alloy part to drive the first locking part to move relative to the first fixing part, so that the first locking tongue extends out of or contracts into the first fixing part.

The embodiment of the invention also provides a shell, which comprises a locking mechanism, a first shell and a second shell, wherein the first shell and the second shell are mutually connected in a sliding manner, a first fixing piece of the locking mechanism is connected to the first shell, the second shell is provided with a first locking port, a locking state or an unlocking state is formed between the first shell and the second shell, and a first lock tongue of the locking mechanism is inserted into the first locking port in the locking state; in the unlocking state, the first lock tongue of the locking mechanism is separated from the first locking port.

The embodiment of the invention also provides electronic equipment which comprises a shell and a power supply arranged on the shell, wherein the power supply is electrically connected with the circuit board and the first memory alloy piece, and the circuit board is used for controlling the power supply and the first memory alloy piece to be powered on or powered off so as to enable the first memory alloy piece to be contracted or reset.

When the mainboard is electrified by a circuit board control power supply to the first memory alloy part, the first memory alloy part is heated and contracted to drive the first locking part to move along a first direction (namely a Y-axis direction), and the first resetting part is compressed by the first locking part, so that the first lock tongue releases the positioning of the second shell and the first shell; when the mainboard is powered off with the first memory alloy part through the circuit board control power supply, the first memory alloy part is reset, the first reset part is reset elastically and pushes the first locking part to reset, so that the first locking tongue is positioned between the second shell and the first shell, automatic locking between the first shell and the second shell of the electronic equipment is realized, and the positioning effect of the flexible screen in the unfolded state is better. If the electronic equipment can not be drawn close due to the mutual positioning of the second shell and the first shell in a falling scene, the damage to the flexible screen or an internal mechanism of the shell is prevented.

Drawings

In order to more clearly illustrate the technical solution and efficacy of the present invention, the following detailed description is provided with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic perspective view of an electronic device according to an embodiment of the invention;

fig. 2 is a schematic perspective view of the electronic device in fig. 1 in an unfolded state;

FIG. 3 is an exploded perspective view of the housing assembly of FIG. 2;

FIG. 4 is an enlarged view of the locking mechanism of FIG. 3;

FIG. 5 is a perspective view of the locking mechanism of FIG. 4 from another perspective other than the circuit board;

FIG. 6 is an exploded perspective view of the locking mechanism of FIG. 4;

FIG. 7 is an enlarged perspective view of a portion of the locking mechanism of FIG. 6;

FIG. 8 is an enlarged perspective view of another part of the lock mechanism of FIG. 6;

FIG. 9 is a perspective cross-sectional view of the first attachment member of FIG. 6;

FIG. 10 is a perspective cross-sectional view of the second mount of FIG. 6;

FIG. 11 is a perspective cross-sectional view of the first connector of FIG. 6;

FIG. 12 is an enlarged schematic perspective view of the first memory alloy wire of FIG. 6;

fig. 13 is an enlarged schematic perspective view of the circuit board in fig. 6;

FIG. 14 is a perspective view of a positioning frame of the locking mechanism of FIG. 6;

FIG. 15 is a perspective view of the positioning frame of FIG. 14 from another perspective;

FIG. 16 is a partially assembled view of the locking mechanism of FIG. 6;

FIG. 17 is a perspective view of the locking mechanism of FIG. 16 from another perspective;

FIG. 18 is a schematic front view of the locking mechanism of FIG. 16;

FIG. 19 is an enlarged view of the XIX portion of FIG. 16;

fig. 20 is an enlarged view of the XX portion in fig. 17;

fig. 21 is an enlarged view of the XXI portion in fig. 18;

FIG. 22 is a perspective assembled view of the locking mechanism of FIG. 6;

fig. 23 is an enlarged view of the XXIII portion in fig. 22;

fig. 24 is an enlarged view of the XXIV portion in fig. 2;

fig. 25 is a perspective view of the housing assembly of fig. 2 in a retracted state.

Description of the main reference numerals:

100. an electronic device; 20. a housing; 21. a locking mechanism; 23. a first locking assembly; 231. a first locking member; 2311. a first bolt; 2313. a first slide guide bar; 2315. a first connection portion; 2316. a first connection hole; 232. a first fixing member; 2320. a first guide groove; 2321. a first outlet; 2323. a first stopper portion; 2324. a first fixing strip; 2325. a first fixing sheet; 2326. a first mounting hole; 2328. a first through hole; 234. a first reset member; 25. a first memory alloy element; 251. a first memory alloy member; 2511. a first memory alloy wire; 2513. a first connecting hook; 253. a first elastic member; 2531. a first elastic body; 2533. a first connecting ring; 255. a first connecting member; 2551. a first connecting plate; 2553. a first connecting column; 2554. a first positioning post; 26. a circuit board; 261. a plate body; 262. a flexible circuit board; 263. a first end; 265. a second end; 27. a second locking assembly; 271. a second locking member; 2711. a second bolt; 2713. a second slide guide bar; 2715. a second connecting portion; 2716. a second connection hole; 272. a second fixing member; 2720. a second guide groove; 2721. a second outlet; 2723. a second stopper portion; 2724. a second fixing strip; 2725. a second fixing sheet; 2726. a second mounting hole; 2728. a second through hole; 274. a second reset member; 28. a second memory alloy element; 281. a second memory alloy member; 2811. a second memory alloy wire; 2813. a second connecting hook; 283. a second elastic member; 2831. a second elastomer; 2833. a second connection ring; 285. a second connecting member; 2851. a second connecting plate; 2853. a second connecting column; 2854. a second positioning column; 29. a positioning frame; 291. a fixed part; 2911. fixing a column; 2913. a supporting strip; 292. a support plate; 2922. mounting holes; 2924. positioning holes; 293. a first receiving groove; 294. a second receiving groove; 295. a first chute; 296. a second chute; 297. a first receiving groove; 298. a second receiving groove; 22. a first housing; 221. a top wall; 223. a first end wall; 2230. a guide groove; 224. a first side wall; 225. a connecting strip; 2251. a first fixing hole; 2253. a second fixing hole; 2255. a stopper portion; 2256. positioning holes; 2257. a positioning column; 227. a first accommodating space; 2210. positioning a groove; 2240. connecting grooves; 24. a second housing; 241. a bottom wall; 2411. a first positioning bar; 2412. a second positioning bar; 2414. a first locking port; 2415. a second lock opening; 2416. a positioning bar; 243. a second end wall; 2430. a slide guiding strip; 244. a second side wall; 246. a guide rail; 247. a second accommodating space; 30. a main board; 40. a power source; 50. a support device; 60. a flexible screen; 62. a positioning area; 64. a roll sliding area; 70. a stroke detection device; 80. a drive member.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.

It should be noted that reference herein to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The terms "first", "second" and "first" as used herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed on … …" are to be broadly construed, e.g., as fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1-6 together, the electronic device 100 according to an embodiment of the present invention can be applied to a mobile phone, a tablet computer, a notebook computer, a display, a smart watch, a portable multimedia player, a mobile medical device, etc., and the mobile phone is taken as an example in this embodiment for specific description. The electronic device 100 in this embodiment includes a housing 20, a main board 30 disposed in the housing 20, a power source 40, a supporting device 50, a flexible screen 60, a stroke detection device 70, and a driving element 80; the housing 20 may be, but is not limited to, a telescopic housing or a foldable housing, and the telescopic housing is taken as an example in the embodiment for specific description. Specifically, the housing 20 includes a locking mechanism 21, a first housing 22 and a second housing 24, the locking mechanism 21 is disposed between the first housing 22 and the second housing 24, and the second housing 24 and the first housing 22 are slidably connected to each other, so that the first housing 22 and the second housing 24 can be retracted from each other or extended from each other; the main board 30 is electrically connected to the power source 40, the flexible screen 60, the stroke detection device 70 and the driving element 80, and the power source 40 is used for supplying power to the main board 30, the flexible screen 60, the stroke detection device 70 and the driving element 80; the supporting device 50 is a hinge-like structure, one side of the supporting device 50 is connected to the first casing 22, and the supporting device 50 is wound around the second casing 20; the flexible screen 60 includes a positioning area 62 and a sliding-rolling area 64 located at one side of the positioning area 62, the positioning area 62 is fixed on the front surface of the first casing 22, and the sliding-rolling area 64 is attached to the surface of the supporting device 50 facing away from the second casing 24. When the first housing 22 slides relative to the second housing 24, the support device 50 slides around the second housing 24, and the sliding area 64 slides with the support device 50 around the second housing 24. Specifically, when the main board 30 controls the driving element 80 to drive the second casing 24 to extend along the X-axis direction relative to the first casing 22, that is, the second casing 24 moves along the X-axis direction relative to the first casing 22 and moves away from the first casing 22, the second casing 24 drives the supporting device 50 to slide relative to the second casing 24 to unwind, and the scrolling region 64 is unwound synchronously with the supporting device 50, so that the display area of the flexible screen 60 is increased; when the main board 30 controls the driving member 80 to drive the second casing 24 to contract in the X-axis direction relative to the first casing 22, that is, the second casing 24 moves in the X-axis direction relative to the first casing 22 to approach the first casing 22, the second casing 24 drives the supporting device 50 to slide and curl relative to the second casing 24, and the roll sliding region 64 curls synchronously with the supporting device 50, so that the volume of the casing 20 is reduced. When the sliding and rolling area 64 is unfolded, the display surface of the flexible screen 60 can be enlarged, so that the use by a user is facilitated; when the slider 64 is rolled, the electronic device 100 can be reduced in size and is convenient to carry. During the process of moving the second housing 24 relative to the first housing 22, the main board 30 can control the locking mechanism 21 to be automatically locked 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.

As shown in fig. 2 to 6, the locking mechanism 21 includes a first locking component 23, a first memory alloy component 25 and a circuit board 26 electrically connected to the motherboard 30, the first locking component 23 includes a first locking member 231, a first fixing member 232, and a first resetting member 234 disposed between the first locking member 231 and the first fixing member 232, the first locking member 231 is movably connected to the first fixing member 232, the first locking member 231 includes a first locking tongue 2311, the first resetting member 234 has an elastic force for driving the first locking member 231 to move and reset relative to the first fixing member 232, the elastic force drives the first locking member 231 to move along a first direction (i.e., a Y-axis direction), so that the first locking tongue 2311 is positioned between the second housing 24 and the first housing 22, and the second housing 24 and the first housing 22 are relatively positioned; the first memory alloy element 25 comprises a first memory alloy member 251 and a first elastic member 253, wherein the first memory alloy member 251 is connected with the first elastic member 253; the end of the first memory alloy member 251 away from the first elastic member 253 is connected to the circuit board 26, such that the first memory alloy member 251 is electrically connected to the circuit board 26, and the end of the first elastic member 253 away from the first memory alloy member 251 is connected to the first locking member 231, wherein the circuit board 26 is configured to control the power supply 40 and the first memory alloy member 251 to be powered on or powered off, so as to control the first memory alloy member 251 to contract or reset, so as to drive the first locking member 231 to move along the first direction (i.e., the Y-axis direction) relative to the first fixing member 232, such that the first locking tongue 2311 extends or contracts to the first fixing member 232. Specifically, the main board 30 controls the driving member 80 to drive the second housing 24 to move in the second direction (i.e., the X-axis direction) relative to the first housing 22, and the main board 30 controls the power source 40 to energize or de-energize the first memory alloy element 25 through the circuit board 26, so that the first memory alloy element 251 contracts or resets to drive the first locking member 231 to move in the first direction (i.e., the Y-axis direction), so that the first locking tongue 2311 extends or contracts to the first fixing member 232. When the first locking tongue 2311 extends out of the first fixing piece 232, the first locking tongue 2311 is positioned between the second shell 24 and the first shell 22 to prevent the second shell 24 from moving relative to the first shell 22; when the first locking tongue 2311 is contracted to the first fixing part 232, the first locking tongue 2311 is separated from between the second shell 24 and the first shell 22, and the second shell 24 can move relative to the first shell 22.

In the invention, the front face refers to the face facing the same direction as the light-emitting face of the flexible screen 60, and the back face refers to the face facing the opposite direction to the light-emitting face of the flexible screen 60; the Y-axis direction refers to a sliding direction of the first locking member 231 relative to the first fixing member 232, that is, the first direction is the Y-axis direction; the X-axis direction refers to a sliding direction of the second housing 24 with respect to the first housing 22, and the second direction is the X-axis direction; the third direction refers to a direction perpendicular to both the first direction and the second direction, i.e., the third direction is a Z-axis direction, i.e., a thickness direction of the electronic device 100.

The opposite ends of the first memory alloy member 251 of the locking mechanism 21 in the present invention are respectively connected to the circuit board 26 and the first locking member 231, when the main board 30 controls the power source 40 to energize the first memory alloy member 251 through the circuit board 26, the first memory alloy member 251 is heated to contract to drive the first locking member 231 to move along the first direction (i.e. the Y-axis direction), and the first resetting member 234 is compressed by the first locking member 231, so that the first latch 2311 releases the positioning of the second housing 24 and the first housing 22; when the main board 30 controls the power supply 40 and the first memory alloy member 251 to be powered off through the circuit board 26, the first memory alloy member 251 is reset, that is, the first memory alloy member 251 is restored to the original length, the first reset member 234 is elastically reset to push the first locking member 231 to be reset, so that the first locking tongue 2311 is positioned between the second housing 24 and the first housing 22, thereby realizing the automatic locking between the second housing 24 and the first housing 22 of the electronic device 100, and ensuring that the flexible screen 60 is positioned well in the unfolded state. If the electronic device 100 is not closed due to the mutual positioning of the second casing 24 and the first casing 22 in a falling scene, the flexible screen 60 or the internal mechanism of the casing 20 is prevented from being damaged.

In this embodiment, the locking mechanism 21 further includes a second locking component 27 and a second memory alloy component 28, the second locking component 27 includes a second locking member 271, a second fixing member 272, and a second resetting member 274 disposed between the second fixing member 272 and the second locking member 271, the second locking member 271 is movably connected to the second fixing member 272, the second locking member 271 includes a second locking tongue 2711, the second resetting member 274 has an elastic force for driving the second locking member 271 to move and reset relative to the second fixing member 272, the elastic force drives the second locking member 271 to move, so that the second locking tongue 2711 is positioned between the second casing 24 and the first casing 22, and the second casing 24 and the first casing 22 are relatively positioned; the second marmem element 28 includes a second marmem element 281 and a second elastic member 283 connected to the second locking member 271, the second marmem element 281 is connected to the second elastic member 283, an end of the second marmem element 281, which is away from the second elastic member 283, is connected to the circuit board 26, the second marmem element 281 is electrically connected to the circuit board 26, and the main board 30 controls the second marmem element 281 through the circuit board 26 to drive the second locking member 271 to move along a first direction (i.e., a Y-axis direction) relative to the second fixing member 272, so that the second locking tongue 2711 extends or contracts from the second fixing member 272. The first memory alloy part 251 is connected between the first locking part 231 and the circuit board 26, the second memory alloy part 281 is connected between the second locking part 271 and the circuit board 26, and the first memory alloy part 251 and the second memory alloy part 281 are respectively electrically connected to the circuit board 26; the circuit board 26 can control the first memory alloy part 251 and the second memory alloy part 281 to drive the first locking part 231 to move relative to the first fixing part 232 and the second locking part 271 to move relative to the second fixing part 272, so that the first locking tongue 2311 extends out of or retracts into the first fixing part 232 and the second locking tongue 2711 extends out of or retracts into the second fixing part 272, and the first locking tongue 2311 and the second locking tongue 2711 can move synchronously or asynchronously; the second housing 24 is movable in a second direction (i.e., the X-axis direction) relative to the first housing 22, the main board 30 controls the power source 40 to be powered on or powered off with the first memory alloy 251 and the second memory alloy 281 through the circuit board 26, so that the first memory alloy 251 contracts or resets to drive the first locking member 231 to move in the first direction (i.e., the Y-axis direction) and the second memory alloy 281 contracts or resets to drive the second locking member 271 to move in the first direction (i.e., the Y-axis direction), so that the first locking tongue 2311 extends or contracts from the first fixing member 232 and the second locking tongue 2711 extends or contracts from the second fixing member 272. When the first locking tongue 2311 and the second locking tongue 2711 respectively extend out of the first fixing piece 232 and the second fixing piece 272, the first locking tongue 2311 and the second locking tongue 2711 are positioned between the second shell 24 and the first shell 22 to prevent the second shell 24 from moving relative to the first shell 22; when the first locking tongue 2311 and the second locking tongue 2711 are respectively contracted in the first fixing element 232 and the second fixing element 272, the first locking tongue 2311 and the second locking tongue 2711 are separated from between the second shell 24 and the first shell 22, and the second shell 24 can move relative to the first shell 22.

As shown in fig. 1-2, the first casing 22 includes a top wall 221, two first end walls 223 respectively disposed at two opposite ends of the top wall 221, a first side wall 224 disposed at one side of the top wall 221, and a connecting bar 225 disposed at one side of the top wall 221 away from the first side wall 224, wherein the top wall 221, the two first end walls 223, and the first side wall 224 enclose a first accommodating space 227; the first receiving space 227 is used for receiving the second housing 24, the main board 30, the power supply 40, and other components. The front surface of the first housing 22 is provided with a positioning groove 2210, and the positioning area 62 of the flexible screen 60 is received and positioned in the positioning groove 2210. The first side wall 224 is provided with a connecting groove 2240 near the top wall 221, the connecting groove 2240 communicates with the positioning groove 2210, opposite ends of the connecting groove 2240 extend to positions near the two first end walls 223 along the Y-axis direction, and the connecting groove 2240 is used for positioning a side portion of the flexible screen 60. The opposite ends of the first housing 22 are respectively provided with a guide groove 2230, the guide groove 2230 extends to be close to the first side wall 224 along the X-axis direction, and the second housing 24 is slidably connected to the guide groove 2230; specifically, a guide groove 2230 is disposed between each of the two first end walls 223 and opposite ends of the top wall 221. Opposite ends of the connecting bar 225 extend to the positions close to the two first end walls 223 along the Y-axis direction, and the first fixing member 232 and the second fixing member 272 are connected to the opposite ends of the connecting bar 225, respectively, so that the first fixing member 232 is close to one of the first end walls 223 and the second fixing member 272 is close to the other first end wall 223; specifically, two opposite ends of a side surface of the connecting strip 225 facing away from the first side wall 224 are respectively provided with a first fixing portion and a second fixing portion, that is, the first fixing portion is close to one of the first end walls 223 and the second fixing portion is close to the other first end wall 223; the first fixing portion has a first fixing hole 2251, and the second fixing portion has a second fixing hole 2253. A stop 2255 is disposed between each of the two opposite ends of the connecting bar 225 and the two first end walls 223. Positioning holes 2256 are formed in the connecting strip 225 near the first and second fixing

holes

2251 and 2253, respectively; positioning posts 2257 are disposed on connecting bar 225 and adjacent to positioning holes 2256, respectively. Preferably, the outer side surface of the first side wall 224 is a circular arc surface.

The second casing 24 includes a bottom wall 241, two second end walls 243 respectively disposed at two opposite ends of the bottom wall 241, and a second side wall 244 disposed at one side of the bottom wall 241; the bottom wall 241, the second side wall 244 and the two second end walls 243 enclose a second receiving space 247. The outer side surface of the second side wall 244 is an arc surface, that is, the outer side surface of the second side wall 244 facing away from the first housing 22 is an arc surface, so as to facilitate the rolling of the supporting device 50 around the second housing 24. Preferably, a plurality of ribs are disposed on the outer side surface of the second sidewall 244, the plurality of ribs are arranged at intervals along the Y-axis direction, and the plurality of ribs can reduce the contact area between the supporting device 50 and the second housing 24, which is beneficial for the sliding and rolling of the supporting device 50 around the second housing 24. Two opposite ends of the second housing 24 are respectively provided with a sliding guide bar 2430, the sliding guide bar 2430 extends to be close to the second side wall 244 along the X-axis direction, and the two sliding guide bars 2430 can be respectively slidably received in the two guide grooves 2230 of the first housing 22, so that the second housing 24 and the first housing 22 are slidably connected along the X-axis direction.

The second housing 24 is provided with a first locking hole 2414 and a second locking hole 2415, the first fixing member 23 and the second fixing member 27 of the locking mechanism 21 are fixedly connected to the first housing 22, and a locking state or an unlocking state is formed between the first housing 22 and the second housing 24; specifically, when the first locking tongue 2311 of the first locking member 231 and the second locking tongue 2711 of the second locking member 271 are inserted into the first locking hole 2414 and the second locking hole 2415, respectively, the second housing 24 and the first housing 22 are in a locked state, in which the second housing 24 cannot move relative to the first housing 22; when the first locking tongue 2311 of the first locking member 231 and the second locking tongue 2711 of the second locking member 271 are disengaged from the first locking hole 2414 and the second locking hole 2415, respectively, the second housing 24 and the first housing 22 are in an unlocked state; the unlocked state means that the second housing 24 is movable in the X-axis direction with respect to the first housing 22. In this embodiment, the opposite two ends of the side surface of the bottom wall 241 facing the second receiving space 247 are respectively provided with a first positioning bar 2411 and a second positioning bar 2412, the first positioning bar 2411 extends along the X-axis direction, the second positioning bar 2412 extends along the X-axis direction, the first positioning bar 2411 is provided with a plurality of first locking holes 2414 along the second direction (the X-axis direction), the second positioning bar 2412 is provided with a plurality of second locking holes 2415 along the second direction (the X-axis direction), the first locking member 231 is selectively inserted into one of the plurality of first locking holes 2414, and the second locking member 271 is selectively inserted into one of the plurality of second locking holes 2415. Specifically, a plurality of first mounting grooves are formed in one side, facing the second positioning strip 2412, of the first positioning strip 2411, the first mounting grooves are arranged along the X-axis direction, a positioning strip 2416 is connected in each first mounting groove, and a first locking opening 2414 is defined by each positioning strip 2416 and the first positioning strip 2411; a plurality of second mounting grooves are formed in one side, facing the first positioning strip 2411, of the second positioning strip 2412, the second mounting grooves are arranged along the X-axis direction, positioning strips 2416 are connected in the second mounting grooves, and a second locking opening 2415 is defined by each positioning strip 2416 and the second positioning strip 2412. The positioning strip 2416 and the first positioning strip 2411 can be connected by, but not limited to, snapping, screwing, or gluing, and the positioning strip 2416 and the second positioning strip 2412 can be connected by, but not limited to, snapping, screwing, or gluing. The opposite ends of the side surface of the second sidewall 244 facing the second receiving space 247 are respectively provided with two stopping slots 2443, and the two stopping parts 2255 of the first housing 22 respectively abut against the two stopping slots 2443 of the second housing 24 to prevent the second housing 24 from moving closer to the first housing 22. Preferably, the outer side surface of the second side wall 244 is provided with a circular arc surface, and the end surface of the second end wall 243 close to the second side wall 244 is provided with a circular arc surface to facilitate the sliding rolling of the supporting device 50 around the second casing 24.

The first housing 22 and the second housing 24 are slidably coupled by the engagement of a guide rail 246 with a guide slot provided in one of the first housing 22 and the second housing 24, the guide slot being provided in the other of the first housing 22 and the second housing 24. In this embodiment, the first housing space 227 of the first housing 22 has a guide rail 246, and the guide rail 246 extends along the X-axis direction; a guide groove is provided in the second housing space 247 of the second housing 24, and extends in the X-axis direction. The guide rails 246 are slidably coupled to the guide slots when the first housing 22 is mated with the second housing 24.

In some embodiments, the second housing 24 and the first housing 22 are slidably connected by a rack and pinion engagement, the rack extending along the X-axis direction, the pinion engaged with the rack, the rack disposed on one of the second housing 24 and the first housing 22, the pinion disposed on the other of the second housing 24 and the first housing 22, and the driving member 80 driving the pinion to rotate so as to move the second housing 24 toward or away from each other relative to the first housing 22.

As shown in fig. 2-9, the first memory alloy component 25 further includes a first connecting member 255, an end of the first elastic member 253 away from the first locking member 231 is connected to the first connecting member 255, the first memory alloy member 251 includes a first memory alloy wire 2511, the first memory alloy wire 2511 is hung on the first connecting member 255, and an end of the first memory alloy wire 2511 away from the first connecting member 255 is connected to the circuit board 26; the second memory alloy assembly 28 further includes a second connecting element 285, an end of the second elastic element 283 away from the second locking element 271 is connected to the second connecting element 285, the second memory alloy element 281 includes a second memory alloy wire 2811, the second memory alloy wire 2811 is hung on the second connecting element 285, and an end of the second memory alloy wire 2811 away from the second connecting element 285 is connected to the circuit board 26. When the first memory alloy wire 2511 contracts or resets, the first locking member 231 moves relative to the first fixing member 232, so that the first locking tongue 2311 contracts or extends out of the first fixing member 232; when the second memory alloy wire 2811 contracts or resets, the second locking element 271 moves relative to the second fixing element 272, so that the second locking tongue 2711 contracts or extends out of the second fixing element 272. Specifically, when the first memory alloy wire 2511 is powered on, the first memory alloy wire 2511 contracts to drive the first locking member 231 to move relative to the first fixing member 232, so that the first locking tongue 2311 is disengaged from the first locking hole 2414, and the first resetting member 234 is compressed by the first locking member 231; when the second memory alloy wire 2811 is powered on, the second memory alloy wire 2811 moves relative to the second fixing element 272, so that the second locking tongue 2711 is disengaged from the second locking opening 2415, the second resetting element 274 is compressed by the second locking element 271, and at this time, the second housing 24 can move along the X-axis direction relative to the first housing 22; when the first memory alloy wire 2511 and the power supply are powered off, the first memory alloy wire 2511 recovers the original length, the first resetting piece 234 is elastically reset to push the first locking piece 231 to move relative to the first fixing piece 232, so that the first locking tongue 2311 is inserted into the first locking hole 2414; when the second memory alloy wire 2811 and the power supply are powered off, the second memory alloy wire 2811 recovers to its original length, the second restoring element 274 elastically restores to push the second locking element 271 to move relative to the second fixing element 272, so that the second locking tongue 2711 is inserted into the second locking opening 2415, and at this time, the second housing 24 cannot move relative to the first housing 22, that is, the second housing 24 cannot move along the X-axis direction relative to the first housing 22.

Preferably, the first memory alloy wire 2511 and the second memory alloy wire 2811 are energized simultaneously with the power supply, and the first memory alloy wire 2511 and the second memory alloy wire 2811 contract simultaneously to drive the first lock tongue 2311 and the second lock tongue 2711 to contract synchronously on the first fixing member 232 and the second fixing member 272, so that the first lock tongue 2311 and the second lock tongue 2711 are disengaged from the first lock opening 2414 and the second lock opening 2415, respectively, and the second housing 24 can move along the X-axis direction relative to the first housing 22; when the first memory alloy wire 2511 and the second memory alloy wire 281 are powered off simultaneously with the power supply, the first memory alloy wire 2511 and the second memory alloy wire 2811 recover to original lengths synchronously, so that the first lock tongue 2311 and the second lock tongue 2711 respectively extend out of the first fixing element 232 and the second fixing element 272 synchronously, the first lock tongue 2311 and the second lock tongue 2711 are respectively inserted into the first locking opening 2414 and the second locking opening 2415, and the second shell 24 cannot move relative to the first shell 22.

The displacement of the first locking element 231 sliding along the first direction (i.e. Y-axis direction) relative to the first fixing element 232 is greater than or equal to the contraction of the first memory alloy wire 2511 in the first direction (i.e. Y-axis direction), and the displacement of the second locking element 271 sliding along the first direction relative to the second fixing element 272 is slightly greater than or equal to the contraction of the second memory alloy wire 2711 in the first direction (i.e. Y-axis direction). The opposite ends of the first elastic element 253 are respectively connected between the first locking element 231 and the first memory alloy wire 2511, the opposite ends of the second elastic element 283 are respectively connected between the second locking element 271 and the second memory alloy wire 2811, when the power supply 40 respectively energizes the first memory alloy wire 2511 and the second memory alloy wire 2811, the contraction of the first memory alloy wire 2511 generates a contraction force to act on the first elastic element 253, the first elastic element 253 drives the first locking element 231 to move, the contraction of the second memory alloy wire 2811 generates a contraction force to act on the second elastic element 283, and the second elastic element 283 drives the second locking element to move; because the first elastic member 234 and the second elastic member 274 have a buffering function, the first memory alloy wire 2511 can be prevented from being pulled out or broken, even if the first locking tongue 2311 is clamped at the first locking port 2414 and cannot be separated from the first locking port 2414, when the power supply 40 supplies power to the first memory alloy wire 2511, the first memory alloy wire 2511 contracts to drive the first elastic member 253 to elastically deform for buffering, and therefore the first memory alloy wire 2511 can also be prevented from being pulled out or broken; when the second locking tongue 2711 is locked at the second locking opening 2415 and cannot be separated from the second locking opening 2415, when the power source 40 energizes the second memory alloy wire 2811, the second memory alloy wire 2811 contracts to drive the second elastic element 283 to elastically deform, so as to achieve a buffering effect, and thus, the second memory alloy wire 2811 can be prevented from being damaged or broken.

The first locking member 231 further includes a first sliding guide strip 2313 slidably connected to the first fixing member 232, one end of the first sliding guide strip 2313 is connected to the first locking tongue 2311, the other end of the first sliding guide strip 2313 is connected to the first elastic member 253, the first resetting member 234 is sleeved on the first sliding guide strip 2313, and two opposite ends of the first resetting member 234 respectively abut against the first locking tongue 2311 and the first fixing member 232, so that the first locking tongue 2311 moves and resets relative to the first fixing member 232; the second locking element 271 further includes a second sliding guide bar 2713 slidably connected to the second fixing element 272, one end of the second sliding guide bar 2713 is connected to the second locking tongue 2711, the second resetting element 274 is sleeved on the second sliding guide bar 2713, and two opposite ends of the second resetting element 274 respectively abut against the second locking tongue 2711 and the second fixing element 272, so that the second locking tongue 2711 moves and resets relative to the second fixing element 272. In this embodiment, the first sliding guide strip 2313 is a cylinder, the first sliding guide strip 2313 extends along the Y-axis direction, one end of the first sliding guide strip 2313 is connected to the middle of one end surface of the first lock tongue 2311, and the area of the first sliding guide strip 2313 on the XZ loading surface is smaller than that of the first lock tongue 2311 on the XZ cross section; the second sliding guide 2713 is a cylinder, the second sliding guide 2713 extends along the Y-axis direction, one end of the second sliding guide 2713 is connected to the middle of one end face of the second lock tongue 2711, and the area of the second sliding guide 2713 in the XZ cross section is smaller than that of the second lock tongue 2711 in the XZ cross section.

The first locking element 231 further includes a first connection portion 2315 connected to an end of the first sliding guide strip 2313 facing away from the first locking tongue 2311, and the first connection portion 2315 can extend out of the first fixing element 232 and then be connected to the first elastic element 253; the second locking element 271 further includes a second connecting portion 2715 connected to an end of the second guide rail 2713 facing away from the second locking tongue 2711, and the second connecting portion 2715 extends out of the second fixing element 272 and is connected to the second elastic element 283. The first connection portion 2315 and the first elastic member 253 can be connected by, but not limited to, screwing, clipping, or welding, and the second connection portion 2715 and the second elastic member 283 can be connected by, but not limited to, screwing, clipping, or welding. In this embodiment, the first connection portion 2315 is a first connection block protruding from an end surface of the first sliding guide strip 2313 away from the first tongue 2311, the first connection portion 2315 is provided with a first connection hole 2316, the first connection hole 2316 penetrates through the first connection portion 2315 along the X-axis direction, and the first locking element 231 is connected to the first elastic element 253 through the first connection hole 2316; the second connecting portion 2715 is a second connecting block protruding from the end surface of the second lock tongue 2711 of the second sliding guide strip 2713, the second connecting portion 2715 is provided with a second connecting hole 2716, the second connecting hole 2716 penetrates through the second connecting block along the X-axis direction, and the second locking piece 271 is connected to the second elastic piece 283 through the second connecting hole 2716. Specifically, the first connection hole 2316 extends in the X-axis direction and penetrates through the first connection portion 2315, and the second connection hole 2716 extends in the X-axis direction and penetrates through the second connection portion 2715.

As shown in fig. 3, 6-10, the first fixing element 232 is provided with a first guide slot 2320 along a first direction (i.e., the Y-axis direction), the first guide slot 2320 penetrates through an end surface of the first fixing element 232 facing away from the first memory alloy wire 2511 to form a first outlet 2321, the first locking element 231 is slidably received in the first guide slot 2320, and the first locking tongue 2311 is driven by the first memory alloy wire 2511 to extend out of or contract into the first outlet 2321; the second fixing element 272 is provided with a second guide slot 2720 along the first direction (i.e., the Y-axis direction), the second guide slot 2720 penetrates through an end surface of the second fixing element 272 facing away from the second memory alloy wire 2811 to form a second exit 2721, the second locking element 271 is slidably accommodated in the second guide slot 2720, and the second locking tongue 2711 extends or contracts to the second exit 2721 under the driving of the second memory alloy wire 2811. Specifically, the first fixing member 232 includes a first fixing bar 2324 and a first fixing plate 2325 disposed on an outer wall of the first fixing bar 2324, and the first guide slot 2320 is disposed on one end surface of the first fixing bar 2324 and extends to be close to the other end surface opposite to the first fixing bar 2324 along the Y-axis direction; the first fixing plate 2325 may be clamped, screwed, glued, or welded to the connection bar 225 of the first shell 22; in this embodiment, opposite ends of the peripheral wall of the first fixing bar 2324 are respectively provided with first fixing pieces 2325, each first fixing piece 2325 is provided with a first mounting hole 2326, and the first mounting hole 2326 is used for connecting the first fixing piece 232 to the first fixing hole 2251 of the connecting bar 225; further, the first fixing plate 2325 and the connecting bar 225 may be fixedly connected through a fastening hole and a fastening pillar, the fastening hole is opened in one of the first fixing plate 2325 and the connecting bar 225, and the fastening pillar is opened in the other of the first fixing plate 2325 and the connecting bar 225. The second fixing member 272 includes a second fixing strip 2724 and a second fixing piece 2725 disposed on an outer wall of the second fixing strip 2724, and the second guide slot 2720 is disposed on one end surface of the second fixing strip 2724 and extends to a position close to the other end surface of the second fixing strip 2724 opposite to the first guide slot in the Y-axis direction; the second fixing piece 2725 may be, but is not limited to, snapped, screwed, glued, or welded to the connection strip 225 of the first housing 22; in this embodiment, the peripheral wall of the second fixing strip 2724 is provided with a second fixing piece 2725, the second fixing piece 2725 extends from one end of the second fixing strip 2727 to the other opposite end, the second fixing piece 2725 is provided with a second mounting hole 2726, and the second mounting hole 2726 is used for connecting the second fixing piece 272 to the second fixing hole 2253 of the connecting strip 225; further, the second fixing piece 2725 and the connecting strip 225 may be fixedly connected by a hole formed in one of the second fixing piece 2725 and the connecting strip 225 and a hole formed in the other of the second fixing piece 2725 and the connecting strip 225. One end of the first fixing member 232 facing away from the first outlet 2321 is provided with a first through hole 2328 communicating with the first guide groove 2320, a diameter of the first sliding guide strip 2313 is smaller than or equal to an inner diameter of the first through hole 2328, and the first sliding guide strip 2313 is slidably disposed through the first through hole 2328, that is, the first sliding guide strip 2313 is slidably disposed through the first through hole 2328 along a first direction (i.e., the Y-axis direction); specifically, the first through hole 2328 is disposed in the middle of an end surface of the first fixing member 232 facing away from the first outlet 2321, and the first through hole 2328 extends along the Y-axis direction to communicate with the first guide groove 2320; one end of the second fixing member 272 facing away from the second outlet 2721 is provided with a second through hole 2728 communicating with the second guide groove 2720, the diameter of the second sliding guide bar 2713 is smaller than or equal to the inner diameter of the second through hole 2728, and the second sliding guide bar 2713 slidably penetrates through the second through hole 2728, that is, the second sliding guide bar 2713 slidably penetrates through the second through hole 2728 along a first direction (i.e., a Y-axis direction); specifically, the second through hole 2728 is provided in a middle portion of an end surface of the second fixing member 272 facing away from the second outlet 2721, and the second through hole 2728 extends in the Y-axis direction to communicate with the second guide groove 2720.

As shown in fig. 8-10, the first guide slot 2320 may be, but is not limited to, a rectangular slot, a circular slot, a polygonal slot, etc., and the first locking tongue 2311 corresponding to the first guide slot 2320 may be, but is not limited to, a rectangular block, a circular column, a polygonal block, etc.; the second guide slot 2720 may be, but not limited to, a rectangular slot, a circular slot, a polygonal slot, etc., and the second locking tongue 2711 corresponding to the second guide slot 2720 may be, but not limited to, a rectangular block, a circular column, a polygonal block, etc. In this embodiment, the first guide slot 2320 is a rectangular slot extending along the Y-axis direction, and the first tongue 2311 is a rectangular block; the second guide groove 2720 is a rectangular groove extending in the Y-axis direction, and the second locking tongue 2711 is a rectangular block. Preferably, the first fixing element 232 is provided with a first stop portion 2323 on an inner wall of the first guide slot 2320, and the first stop portion 2323 is used for stopping the first locking element 231 from moving toward the end close to the first memory alloy wire 2511; the second fixing member 272 has a second stop portion 2723 on an inner wall of the second guide slot 2720, and the second stop portion 2723 is used for stopping the second locking member 271 from moving toward an end close to the second memory alloy wire 2811. In this embodiment, the first positioning stop portion 2323 is a first positioning stop strip disposed at an end of the inner wall of the first guide slot 2320 close to the first through hole 2328, and the first locking tongue 2311 can slide along the Y-axis direction at an end of the first guide slot 2320 away from the first through hole 2328 until an end surface of the first locking tongue 2311 close to the first sliding guide strip 2313 stops at the first positioning stop portion 2323 (i.e. the first positioning stop strip) to prevent the first locking tongue 2311 from continuously sliding towards an end close to the first through hole 2328, at this time, the first locking tongue 2311 is completely accommodated in the first fixing strip 2324; the second stopper 2723 is provided with a second stopper bar at an end of the inner wall of the second guide slot 2720 close to the second through hole 2728, and the second locking tongue 2711 can slide in the second guide slot 2720 at an end far from the second through hole 2728 along the Y-axis direction until the end surface of the second locking tongue 2711 close to the second guide sliding bar 2713 stops at the second stopper 2723 (i.e., the second stopper bar) to prevent the second locking tongue 2711 from continuing to slide toward an end close to the second through hole 2728, at this time, the second locking tongue 2711 is completely accommodated in the second fixing bar 2724.

As shown in fig. 6-8 and 11, the first connecting member 255 includes a first connecting plate 2551, a first connecting post 2553 disposed on the first connecting plate 2551, and a first positioning post 2554, the first memory alloy wire 2551 is hung on the first connecting post 2553, and one end of the first elastic member 253 away from the first locking member 231 is positioned on the first positioning post 2554; preferably, the first connecting post 2553 and the first positioning post 2554 are both cylinders, the first connecting post 2553 and the first positioning post 2554 are parallel at intervals, and the axial line of the first connecting post 2553 and the axial line of the first positioning post 2554 are both parallel to the X axis. The second connecting member 285 includes a second connecting plate 2851, a second connecting post 2853 and a second connecting post 2854, the second connecting post 2851 is disposed on the second connecting plate 2851, the second memory alloy wire 2811 is hung on the second connecting post 2583, and the end of the second elastic member 283 far away from the second locking member 271 is positioned on the second connecting post 2854. Preferably, the second connecting column 2853 and the second positioning column 2854 are both cylinders, the second connecting column 2853 is parallel to the second positioning column 2854 at intervals, and the axial line of the second connecting column 2853 and the axial line of the second positioning column 2854 are both parallel to the X axis. In this embodiment, the first connecting member 255 includes two first connecting plates 2551 spaced in parallel, the two first connecting plates 2551 enclose a first space 2556, and the first connecting posts 2553 and the first positioning posts 2554 are respectively connected between the two first connecting plates 2551; preferably, the first connecting column 2553 is located near one end of the first memory alloy member 251, and the first positioning column 2554 is located near one end of the first elastic member 253; the second connecting piece 285 includes two second connecting plates 2851 spaced in parallel, a second spacing 2856 is enclosed by the two second connecting plates 2851, and the second connecting column 2853 and the second positioning column 2854 are respectively connected between the two second connecting plates 2851; preferably, the second connecting post 2853 is located near one end of the second marmem element 281, and the second positioning post 2854 is located near one end of the second elastic element 283. In other embodiments, the first connecting post 2553 and the first positioning post 2554 can be, but are not limited to, rectangular posts, polygonal posts, oval posts, etc.; the second connecting column 2853 and the second positioning column 2854 can be, but not limited to, rectangular columns, polygonal columns, oval columns, etc.

The first memory alloy component 251 further includes a first connection hook 2513 connected to an end of the first memory alloy wire 2511, the first connection hook 2513 is connected to the circuit board 26, and the first memory alloy wire 2511 is electrically connected to the circuit board 26 through the first connection hook 2513; the second memory alloy assembly 28 further includes a second connection hook 2813 connected to an end of the second memory alloy wire 2811, the second connection hook 2813 is connected to the circuit board 26, and the second memory alloy wire 2811 is electrically connected to the circuit board 26 through the second connection hook 2813. In this embodiment, two ends of the first memory alloy wire 2511 are respectively connected with a first connection hook 2513, the first memory alloy wire 2511 passes through the first space 2556 of the first connection member 255 and is hung on the first connection column 2553; two ends of the second memory alloy wire 2811 are respectively connected with a second connection hook 2813, and the second memory alloy wire 2811 is inserted into the second space 2856 of the second connection element 285 and is hung on the second connection column 2853.

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

As shown in fig. 7-8, the first elastic member 253 includes a first elastic body 2531 and two first connecting rings 2533 connected to opposite ends of the first elastic body 2531, wherein the two first connecting rings 2533 are respectively connected to the first connecting portion 2315 and the first positioning post 2554 of the first connecting member 255; the second resilient member 283 includes a second resilient body 2831 and two second connecting rings 2833 connected to opposite ends of the second resilient body 2831, and the two second connecting rings 2833 are connected to the second connecting portion 2715 and the second positioning post 2854 of the second connecting member 285, respectively. The first elastic member 253 and the second elastic member 283 may be, but not limited to, a spring, a rubber strip, or an elastic plastic strip. In this embodiment, the first elastic member 253 and the second elastic member 283 are both extension springs.

As shown in fig. 6 and 13, the circuit board 26 includes a rectangular board body 261 and a flexible circuit board 262 connected to the board body 261, the board body 261 includes a first end 263 and a second end 265 opposite to each other, the first end 263 is close to the second locking component 27, the second end 265 is close to the first locking component 23, the first connection hook 2513 is clamped at the second end 265, the second connection hook 2813 is clamped at the first end 263, and the first memory alloy wire 251 and the second memory alloy wire 281 are spaced apart from each other. Two opposite ends of one side surface of the plate body 261 are respectively provided with a first conductive sheet 2611 and a second conductive sheet 2613, the first conductive sheet 2611 is used for being electrically connected with the first connecting hook 2513, and the second conductive sheet 2613 is used for being electrically connected with the second connecting hook 2813; the flexible circuit board 262 is used to electrically connect the motherboard. The circuit board 26 is provided with a fixing hole 2615.

As shown in fig. 6 and 14-15, the locking mechanism 21 further includes a bar-shaped positioning frame 29, the positioning frame 29 includes a fixing portion 291 disposed at a middle portion thereof, the circuit board 261 is fixedly connected to the fixing portion 291, and the first locking component 23 and the second locking component 27 are disposed at two opposite ends of the positioning frame 29, respectively. Specifically, the positioning frame 29 further includes a rectangular supporting plate 292, the fixing portion 291 includes a fixing post 2911 disposed at a middle portion of a side of the supporting plate 292 facing the circuit board 26, a fixing hole 2615 on the circuit board 26 corresponds to the fixing post 2911 of the positioning frame 29, and the fixing post 2911 is detachably connected to the fixing hole 2615. In this embodiment, the supporting plate 292 is provided with four fixing posts 2911, the circuit board 26 is provided with four fixing holes 2616 respectively corresponding to the four fixing posts 2911, and the four fixing posts 2911 are respectively connected with the four fixing holes 2616 in a matching manner so as to fixedly connect the circuit board 26 to the positioning frame 29.

The positioning frame 29 has a first receiving groove 293 and a second receiving groove 294 on a side facing the circuit board 26, the first receiving groove 293 and the second receiving groove 294 are parallel to each other at intervals, the first receiving groove 293 and the second receiving groove 294 are parallel to the sliding direction (i.e. the Y-axis direction) of the first locking element 231, the first memory alloy element 251 can be received in the first receiving groove 293, and the second memory alloy element 281 can be received in the second receiving groove 294. Specifically, two parallel spaced first receiving grooves 293 are located at one side of the support plate 292, and two parallel spaced second receiving grooves 294 are located at the opposite side of the support plate 292. The fixing portion 291 further includes a plurality of supporting bars 2913 disposed on a side of the positioning frame 291 facing the circuit board 26, the supporting bars 2913 are spaced in parallel, each supporting bar 2913 is parallel to the first receiving groove 293, the supporting bars 2913 enclose the first receiving groove 293 and the second receiving groove 294, and the supporting bars 2913 are used for supporting the circuit board 26 to prevent the first memory alloy wire 2511 and the second memory alloy wire 281 from contacting the circuit board 26 and short circuits. Preferably, the fixing column 2911 is protruded on the supporting bar 2913, and the fixing column 2911 extends in the X-axis direction.

The opposite ends of the positioning frame 29 are respectively provided with a first sliding groove 295 and a second sliding groove 296, the first sliding groove 295 extends along the moving direction of the first locking member 231 and is communicated with the first accommodating groove 293, the second sliding groove 296 extends along the moving direction of the second locking member 271 and is communicated with the second accommodating groove 294, the first connecting member 255 is slidably received in the first sliding groove 295, and the second connecting member 285 is slidably received in the second sliding groove 296. Specifically, the side of the support plate 292 facing the circuit board 26 near the opposite ends is respectively provided with a first sliding groove 295 and a second sliding groove 296, the first sliding groove 295 is parallel to the first accommodating groove 293 and the first sliding groove 295 communicates with the ends of the two first accommodating grooves 293, and the second sliding groove 296 is parallel to the second accommodating groove 294 and the second sliding groove 296 communicates with the ends of the two second accommodating grooves 294.

A first receiving groove 297 and a second receiving groove 298 are respectively formed at two opposite ends of the positioning frame 29 facing the side surface of the circuit board 26, the first receiving groove 297 extends along the sliding direction of the first locking member 231, one end of the first receiving groove 297 is communicated with the first sliding groove 295, and the other opposite end of the first receiving groove 297 penetrates through the end surface of the positioning frame 29; the second receiving groove 298 extends along the sliding direction of the second locking member 271, one end of the second receiving groove 298 is connected to the second sliding groove 296, and the other end of the second receiving groove 298 opposite to the second sliding groove passes through the end face of the positioning frame 29. The first receiving groove 297 is for receiving the first elastic member 253, and the second receiving groove 298 is for receiving the second elastic member 283. The positioning frame 29 has a mounting hole 2922 and a positioning hole 2924 at two ends facing the side of the circuit board 26 opposite to the fixing portion 291.

In the present invention, the first restoring element 234 is a first spring that can be sleeved on the first sliding guide strip 2313, and the second restoring element 274 is a second spring that can be sleeved on the second sliding guide strip 2713.

Referring to fig. 4 to fig. 24, when the locking mechanism 21 is assembled, the first restoring member 234 is sleeved on the first sliding guide strip 2313, and the first restoring member 234 and the first sliding guide strip 2313 are inserted into the first guide slot 2320 from the first outlet 2321, so that the first connecting portion 2315 passes through the first through hole 2328 of the first fixing member 232 and is exposed; connecting the first connection ring 2533 at one end of the first elastic member 253 to the first connection portion 2315, and connecting the first connection ring 2533 at the other end of the first elastic member 253 to the first connection member 255; specifically, the locking member (e.g., a screw) passes through the first connection ring 2533 and is locked in the first connection hole 2316 of the first connection portion 2315, so that the first elastic member 253 is connected to the first locking member 231, and the first connection ring 2533 at one end of the first elastic member 253, which is far away from the first locking member 231, is located in the first space 2556 of the first connection member 255 and is sleeved on the first positioning post 2554, so that the first elastic member 253 is connected to the first connection member 255; the first memory alloy wire 2511 is accommodated in the first gap 2556 of the first connector 255 and hung on the first connecting column 2553, and the first connecting hook 2513 of the first memory alloy part 251 is clamped at the first end 263 of the circuit board 26; the second restoring member 274 is sleeved on the second sliding guide bar 2713, and the second restoring member 274 and the second sliding guide bar 2713 are inserted into the second guide slot 2720 from the second outlet 2721, so that the second connecting portion 2715 passes through the second through hole 2728 of the second fixing member 272 to be exposed; the second connecting ring 2833 of one end of the second elastic member 283 is connected to the second connecting portion 2715, and the second connecting ring 2833 of the other end of the second elastic member 283 is connected to the second connecting member 285; specifically, the locking member (e.g., a screw) passes through the second connection ring 2833 and is locked in the second connection hole 2716 of the second connection portion 2715, so that the second elastic member 283 is connected to the second locking member 271, and the second connection ring 2833 at one end of the second elastic member 283 away from the second locking member 271 is located in the second space 2856 and sleeved on the second positioning post 2854, so that the second elastic member 283 is connected to the second connection member 285; the second memory alloy wire 2811 is accommodated in the second space 2856 of the second connecting element 285 and hung on the second connecting post 2853, and the second connecting hook 2813 of the second memory alloy element 281 is clamped at the second end 265 of the circuit board 26. Mounting the circuit board 26 to the fixing portion 291, specifically, inserting the fixing posts 2911 of the positioning frame 29 into the corresponding fixing holes 2615 of the circuit board 26 respectively until the circuit board 26 abuts against the supporting bars 2913; the first connecting member 255 and the first elastic member 253 are respectively accommodated in the first sliding groove 295 and the first accommodating groove 297 of the positioning frame 29, so that the first memory alloy wire 2511 is accommodated in the first accommodating groove 293 of the positioning frame 29; the second connecting member 285 and the second elastic member 283 are respectively received in the second sliding groove 296 and the second receiving groove 298 of the positioning frame 29, so that the second memory alloy wire 281 is received in the second receiving groove 294 of the positioning frame 29.

Referring to fig. 1-5 and fig. 15-24, when the electronic apparatus 100 is assembled, the locking mechanism 21 is mounted on the first housing 22, specifically, the positioning frame 29, the first fixing element 232 and the second fixing element 272 of the locking mechanism 21 are connected to the connecting bar 225 of the first housing 22, one side of the locking mechanism 21, which is provided with the circuit board 26, is attached to the connecting bar 225, so that the positioning posts 2257 of the connecting bar 225 are inserted into the corresponding positioning holes 2924, respectively; a locking member (e.g., a screw) is inserted through the mounting hole 2922 of the positioning frame 29 and locked in the corresponding positioning hole 2256 of the connecting bar 225, so that the positioning frame 29 is fixedly connected to the connecting bar 225, the first connecting member 255, the first elastic member 253, the second connecting member 285 and the second elastic member 274 are located between the positioning frame 29 and the connecting bar 225, and the first connecting member 255, the first elastic member 253, the second connecting member 285 and the second elastic member 274 can be prevented from being separated from the positioning frame 29; attaching the first fixing element 232 to the connecting bar 225 of the first housing 22, such that the first installation hole 2326 of the first fixing element 232 faces the first fixing hole 2251, and a locking element (e.g., a screw) passes through the first installation hole 2326 and is locked to the first fixing hole 2251 of the connecting bar 225, such that the first fixing element 232 is fixedly connected to the first housing 22; the second fixing member 272 is attached to the connecting bar 225 of the first housing 22 such that the second mounting hole 2726 of the second fixing member 272 faces the second fixing hole 2253, and a locking member (e.g., a screw) is locked to the second fixing hole 2253 of the connecting bar 225 through the second mounting hole 2726. At this time, the first memory alloy wire 2511 and the second memory alloy wire 2811 are in a stretched state, the first locking tongue 2311 of the first locking member 231 extends out of the first fixing member 232 and extends out of the second fixing member 272 towards one of the first end walls 223 and the second locking tongue 2711 of the second locking member 271 and faces the other first end wall 223; the side of the second casing 24 away from the second side wall 244 is inserted into the first receiving space 227 of the first casing 22, so that the two guide bars 2430 of the second casing 24 are respectively slidably inserted into the two guide slots 2230, and the guide rail 246 is slidably received in the guide slot of the first casing 22, so as to electrically connect the flexible circuit board 262 to the main board 30. At this time, the first locking tongue 2311 and the second locking tongue 2711 are respectively inserted into the first locking opening 2414 and the second locking opening 2415 on the side farthest from the second side wall 244, and the first casing 22 and the second casing 24 are in a fully unfolded state; the main board 30 can control the driving member 80 to drive the second housing 24 to slide along the X-axis direction relative to the first housing 22.

Attaching the back surface of the sliding and rolling area 64 of the flexible screen 60 to the front surface of the supporting device 50, the positioning area 62 of the flexible screen 60 being accommodated in the positioning groove 2210 of the first casing 22, and the back surface of the positioning area 62 being fixedly attached to the front surface of the top wall 221, one side of the flexible screen 60 being engaged in the connecting groove 2240 of the first casing 22; surrounding the second housing 24 on the side of the support means 50 facing away from the flexible screen 60; the side of the support device 50 adjacent to the positioning region 62 is connected to the first housing 22, and the side of the support device 50 away from the positioning region 62 is slidably connected to the bottom wall 241 of the second housing 24, so that the support device 50 and the flexible screen 60 slidably surround the second housing 24. At this time, when the power source 40 is energized with the first memory alloy element 25, the first memory alloy wire 2511 is heated to contract and drive the first locking member 231 to slide in the first guide slot 2320 of the first fixing member 232, so that the first locking tongue 2311 is disengaged from the first locking hole 2414; when the power source 40 is energized with the second memory alloy element 28, the second memory alloy wire 2811 is heated to contract and drive the second locking element 271 to slide in the second guide slot 2720 of the second fixing element 272, so that the second locking tongue 2711 is disengaged from the second locking element 2415, the first restoring element 234 and the second restoring element 274 are compressed, the second housing 24 and the first housing 22 are in an unlocked state, and the second housing 24 can move in the X-axis direction relative to the first housing 22. Specifically, when the power source 40 energizes the first memory alloy wire 2511 through the circuit board 26, the contraction force generated by the contraction of the first memory alloy wire 2511 acts on the first elastic member 253, the first elastic member 253 applies force to the first locking member 231, and the first resetting member 234 is compressed to disengage the first locking tongue 2311 from the first locking opening 2414; when the power source 40 energizes the second memory alloy wire 2811 through the circuit board 26, the contraction of the second memory alloy wire 2811 generates a contraction force to act on the second elastic member 283, the force is applied to the second locking member 271 through the second elastic member 283, the second restoring member 274 is compressed, so that the second locking tongue 2711 is separated from the second locking opening 2415, so as to realize the automatic unlocking of the locking mechanism 21, and the second housing 24 and the first housing 22 can move relatively. When the power source 40 stops energizing the first memory alloy wire 2511, the first memory alloy wire 2511 recovers to the original length, the first resetting piece 234 resets elastically, and the first resetting piece 234 pushes the first locking piece 231 to move towards one end far away from the first memory alloy wire 2511, so that the first locking tongue 2311 is inserted into the first locking hole 2414; when the power supply 40 stops energizing the second memory alloy wire 2811, the second memory alloy wire 2811 recovers to the original length, the second resetting element 274 elastically resets, the second resetting element 274 pushes the second locking element 271 to move towards the end far away from the second memory alloy wire 2811, so that the second locking tongue 2711 is inserted into the second locking opening 2415; to achieve automatic locking of the lock mechanism 21 and prevent the second housing 24 from moving relative to the first housing 22.

Preferably, the first locking tongue 2311 and the second locking tongue 2711 can synchronously extend out of the first fixing member 232 and the second fixing member 272, respectively, and the first locking tongue 2311 and the second locking tongue 2711 can synchronously retract in the second fixing member 232 and the second fixing member 272, respectively; specifically, the power source 40 synchronously energizes the first memory alloy wire 2511 and the second memory alloy wire 2811, the first memory alloy wire 2511 and the second memory alloy wire 2811 contract synchronously, and the first lock tongue 2311 and the second lock tongue 2711 are respectively and synchronously separated from the corresponding first lock opening 2414 and the second lock opening 2415, so as to unlock the locking mechanism 21 b; when the power source 40 and the first memory alloy wire 2511 and the second memory alloy wire 2811 are powered off synchronously, the first memory alloy wire 2511 and the second memory alloy wire 2811 recover to original lengths synchronously, and the first lock tongue 2311 and the second lock tongue 2711 are inserted into the corresponding first lock opening 2414 and the second lock opening 2415 synchronously, so as to lock the locking mechanism 21.

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

Preferably, the elastic coefficient of the first elastic member 253 is greater than that of the first restoring member 234 and the elastic coefficient of the second elastic member 274 is greater than that of the second restoring member 274. In this embodiment, the firstThe elastic member 253 and the second elastic member 274 are extension springs with the same elastic coefficient, and the first restoring member 234 and the second restoring member 274 are propping springs with the same elastic coefficient; the elastic coefficients of the first and second

reset elements

234 and 274 are KF, the elastic coefficients of the first and second elastic elements 253 and 284 are KB, the power source 40 energizes the first memory alloy wire 2511 via the circuit board 26 and moves backward, so that one end of the first memory alloy wire 2511 moves and displaces in the Y-axis direction by Δ x2, the power source 40 energizes the second memory alloy wire 2811 via the circuit board 26, so that one end of the second memory alloy wire 2811 moves and displaces in the Y-axis direction by Δ x2, and the first and

second locking tongues

2311 and 2711 respectively move and displace in the Y-axis direction by Δ x1, which are related to each other in that

The displacement of the first locking member 231 relative to the first fixing member 232 in the first direction (i.e. Y-axis direction) is smaller than the contraction of the first memory alloy element 25, and the displacement of the second locking member 271 relative to the second fixing member 272 in the first direction (i.e. Y-axis direction) is smaller than the contraction of the second memory alloy element 28, i.e. Δ x2>Δ x1; therefore, the displacement Δ x1 of the first latch 2311 is less than the amount Δ x2 of contraction of the first memory alloy wire 2511, i.e., Δ x2>Δ x1; the moving displacement deltax 1 of the second bolt 2711 is smaller than the contraction delta x2 of the second memory alloy wire 2811, namely deltax 2>Δ x1. In order to satisfy the Δ x1 stroke of the movement displacement of the first locking tongue 2311 or the second locking tongue 2711, the Δ x1 and the Δ x2 are generally relatively close to each other, otherwise, the shrinkage of the first memory alloy wire 2511 and the second memory alloy wire 2811 generates a large loss, wherein the loss = Δ x2- Δ x1; therefore, when the entire space of the case 20 is limited, KB is used>>At KF, the shrinkage loss of the first memory alloy wire 2511 and the second memory alloy wire 2811 is close to 0.

When the first locking element 231 and/or the second locking element 271 of the locking mechanism 21 are/is locked by the external force, even if the power source 40 continues to supply power to the first memory alloy wire 2511 and/or the second memory alloy wire 2811, the first memory alloy wire 2511 only compresses the first elastic element 253 at the moment to provide the deformation displacement of the first memory alloy wire 2511, and the second memory alloy wire 2811 only compresses the second elastic element 283 at the moment to provide the deformation displacement of the second memory alloy wire 2811; therefore, the first elastic member 253 has a function of protecting the first memory alloy wire 2511, and the second elastic member 283 has a function of protecting the second memory alloy wire 2811. In this embodiment, the first elastic member 253 is added to one end of the first memory alloy wire 2511, so that the first memory alloy wire 2511 can be prevented from being damaged; the second elastic member 283 is added at one end of the second memory alloy wire 2811, so that the second memory alloy wire 2811 can be prevented from being damaged, and the wire 2811 has the advantages of simple structure, convenience in application and lower cost.

In other embodiments, the second locking assembly 27 and the second memory alloy assembly 28 of the locking mechanism 21 may be omitted, that is, the locking mechanism 21 only includes the first locking assembly 23 and the first memory alloy assembly 25 connected to the positioning frame 29 and the circuit board 26, the second housing 24 is provided with a plurality of first locking openings 2412 along the sliding direction of the second housing 24, and the first locking tongues 2311 of the first locking assembly 23 are selectively inserted into one of the plurality of first locking openings 2412.

In other embodiments, the first locking assembly 23 and the first memory alloy assembly 25 may be omitted from the locking mechanism 21, that is, the locking mechanism 21 only includes the second locking assembly 27 and the second memory alloy assembly 28 connected to the positioning frame 29 and the circuit board 26, the second housing 24 is provided with a plurality of second locking openings 2415 along the sliding direction of the second housing 24, and the second locking tongue 2711 of the second locking assembly 27 is selectively inserted into one of the plurality of second locking openings 2414.

As shown in fig. 1-3, 6-8 and 25, when the flexible screen 60 of the electronic device 100 is completely curled, the power source 40 and the first and second

memory alloy wires

2511 and 2811 are both in a power-off state, the first and second

memory alloy wires

2511 and 2811 are both in a reset state, the first reset element 234 elastically pushes the first locking element 231 to insert the first locking tongue 2311 into the corresponding first locking hole 2414, and the second reset element 274 elastically pushes the second locking element 271 to insert the second locking tongue 2711 into the corresponding second locking hole 2415, so as to prevent the second housing 24 from sliding relative to the first housing 22; when the power source 40 is energized with the first memory alloy wire 2511 and the second memory alloy wire 2811, the first memory alloy wire 2511 contracts to drive the first locking tongue 2311 to disengage from the corresponding first locking port 2414, and the second memory alloy wire 2811 contracts to drive the second locking tongue 2711 to disengage from the corresponding second locking port 2415, so that the second housing 24 contracts relative to the first housing 22, and the first restoring element 234 and the second restoring element 274 are compressed. When the flexible screen 60 of the electronic device 100 is fully expanded, the first memory alloy wire 2511 and the second memory alloy wire 2811 are both in a power-off state, the first memory alloy wire 2511 and the second memory alloy wire 2511 both recover to the original lengths, the first resetting piece 234 elastically pushes the first locking piece 231 to enable the first locking tongue 2311 to be inserted into the corresponding first locking hole 2414, and the second resetting piece 274 elastically pushes the second locking piece 271 to enable the second locking tongue 2711 to be inserted into the corresponding second locking hole 2415, so as to prevent the second housing 24 from moving relative to the first housing 22; when the power source 40 is energized with the first memory alloy wire 2511 through the circuit board 26, the first memory alloy wire 2511 is heated to contract to drive the first locking tongue 2311 to disengage from the corresponding first locking opening 2414, and when the power source 40 is energized with the second memory alloy wire 2811 through the circuit board 26, the second memory alloy wire 2811 is heated to contract to drive the second locking tongue 2711 to disengage from the corresponding second locking opening 2415, so that the second casing 24 can be conveniently unfolded relative to the first casing 22.

Referring to fig. 1-8 and 24-25, when the flexible screen 60 of the electronic device 100 needs to be unfolded or rolled, the main board 30 controls the power source 40 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811 through the circuit board 26, the first memory alloy wire 2511 is heated and contracted to move the first locking member 231 toward one end close to the circuit board 26, and the second memory alloy wire 2811 is heated and contracted to move the second locking member 271 toward one end close to the circuit board 26, so that the first locking tongue 2311 and the second locking tongue 2711 are separated from the first locking opening 2414 and the second locking opening 2415, respectively, and the second housing 24 and the first housing 22 are in an unlocked state; at this time, the main board 30 controls the driving member 80 to push or pull the second housing 24 to slide along the X-axis direction, so that the second housing 24 moves away from or approaches the first housing 22, the second housing 24 slides relative to the supporting device 50 to unwind or curl the supporting device 50, so that the supporting device 50 slides around the second housing 24, and the sliding-rolling area 64 unwinds or curls along with the supporting device 50.

In one embodiment, the stroke detection device 70 is electrically connected to the circuit board 26, and the stroke detection device 70 may be a distance sensor for detecting a position at which the second housing 24 moves relative to the first housing 22; the stroke detection device 70 is configured to detect a position of the second housing 24 sliding relative to the first housing 22, when the flexible screen 60 needs to be unfolded, the main board 30 controls the power source 40 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811 through the circuit board 26, the first memory alloy wire 2511 is heated and contracted to drive the first locking member 231 to move toward the circuit board 26 and the second memory alloy wire 2811 to move toward the circuit board 29, so that the first locking tongue 2311 and the second locking tongue 2711 are separated from the first locking opening 2414 and the second locking opening 2415, respectively; the main board 30 controls the driving member 80 to drive the second housing 24 to slide relative to the first housing 22 so as to mutually unfold the second housing 24 and the first housing 22, so that the supporting device 50 slides around the second housing 24, and the roll sliding area 64 is unfolded with the supporting device 50. The stroke detecting device 70 detects a position where the second housing 24 moves relative to the first housing 22, when the second housing 24 moves to a required locking position relative to the first housing 22, the stroke detecting device 70 detects the position of the second housing 24 and calculates corresponding positions of the first locking port 2414 and the second locking port 2415, and then sends a signal to the circuit board 26, the main board 30 receives the signal and controls the power supply 40 to be disconnected from the first memory alloy component 25 and the second memory alloy component 28 through the circuit board 26, so that the first memory alloy wire 2511 and the second memory alloy wire 2811 restore to their original lengths, that is, the first memory alloy wire 2511 and the second memory alloy wire 2811 are restored, and the main board 30 controls the driving element 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 restoring element 234 and the second restoring element 274 respectively push the first locking tongue 2311 and the second locking tongue 2711 away from each other until the first locking tongue 2311 and the second tongue 2711 are respectively inserted into the first locking port 2414 and the second locking port 2415, so as to position the second housing 24 and the second housing 22 with each other. When the second housing 24 needs to be unfolded again relative to the first housing 22, the main board 30 controls the power source 40 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811 again through the circuit board 26, so that the first locking tongue 2311 and the second locking tongue 2711 are disengaged from the first locking opening 2414 and the second locking opening 2415 for unlocking, and the above process is repeated until the second housing 24 is completely unfolded relative to the first housing 22 and the flexible screen 60 is in a completely unfolded state. When the flexible screen 60 needs to be curled, the main board 30 controls the power source 40 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811 through the circuit board 26, and the first memory alloy wire 2511 and the second memory alloy wire 2811 are respectively heated and contracted to drive the first locking piece 231 and the second locking piece 271 to approach each other, so that the first locking tongue 2311 and the second locking tongue 2711 are respectively separated from the first locking opening 2414 and the second locking opening 2415; the main board 30 controls the driving element 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 are close to each other, so that the supporting device 50 rolls around the second housing 24, and the roll sliding area 64 rolls with the supporting device 50. The stroke detection device 70 detects a position where the second housing 24 moves relative to the first housing 22, when the second housing 24 moves to a position 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 positions of the corresponding first locking port 2414 and the second locking port 2415, and then sends a signal to the main board 30, the main board 30 receives the signal and controls the power supply 40 to be disconnected from the first memory alloy component 25 and the second memory alloy component 28 through the circuit board 26, so that the first memory alloy component 25 and the second memory alloy component 28 recover to original lengths, meanwhile, the main board 30 controls the driving element 80 to stop driving the second housing 24, and the first resetting element 234 and the second resetting element 274 respectively push the first locking tongue 2311 and the second locking tongue 2711 away from each other until the first locking tongue 2311 and the second locking tongue 2711 are respectively inserted into the first locking port 2414 and the second locking port 2415. When the second housing 24 needs to be moved close to the first housing 22 again, the main board 30 controls the power source 40 to energize the first memory alloy wire 2511 and the second memory alloy wire 2811 again through the circuit board 26, so that the first locking tongue 2311 and the second locking tongue 2711 are disengaged from the first locking opening 2414 and the second locking opening 2415 for unlocking, and the above process is repeated until the second housing 24 is completely contracted with respect to the first housing 22 and the flexible screen 60 is in a completely curled state.

In another embodiment, during the process of moving the second housing 24 relative to the first housing 22, the stroke detecting device 70 is configured to detect the position of the second housing 24 relative to the first housing 22, and calculate the time required for the second housing 24 to move to the locking position relative to the first housing 22, and the stroke detecting device 70 sends a signal to the circuit board 26, the circuit arc 26 receives the signal and controls the power supply 40 and the first memory alloy element 25 and the second memory alloy element 28 to be powered off in advance, the first memory alloy element 25 and the second memory alloy element 28 are gradually reset, the first reset piece 234 and the second reset piece 274 respectively push the first lock tongue 2311 and the second lock tongue 2711 away from each other, meanwhile, the second housing 24 continues to move relative to the first housing 22, and when the first lock tongue 2311 and the second lock tongue 2711 respectively face the corresponding first lock opening 2414 and second lock opening 2415, the main board 40 controls the driving piece 80 to stop driving the second housing 24 to move relative to the first housing 22, and the first lock tongue 2311 and the second lock tongue 2711 are inserted into the corresponding first lock opening 2414 and second lock opening 2415, respectively, and the second lock tongue 2415 can not move relative to the first housing 27122. When the second housing 24 needs to be moved again with respect to the first housing 22, the first memory alloy wire 2511 and the second memory alloy wire 2811 are electrified and unlocked again, and the above process is repeated. The above-described another embodiment can improve the response time of locking of the lock mechanism 21.

As shown in fig. 6 to 10, since the first fixing member 232 of the locking mechanism 21 is provided with the first stop portion 2323 and the second fixing member 272 is provided with the second stop portion 2723, the first locking tongue 2311 can slide in the first guide slot 2320 and stop at the first stop portion 2323, and the second locking tongue 2711 can slide in the second guide slot 2720 and stop at the second stop portion 2723; therefore, when the first memory alloy wire 2511 is energized, the first memory alloy wire 2511 is heated to contract so as to drive the first locking tongue 2311 to slide in the first guide slot 2320, and the second memory alloy wire 2811 is heated to contract so as to drive the second locking tongue 2711 to slide in the second guide slot 2720, and the first locking tongue 2311 and the second locking tongue 2711 are respectively stopped at the first stop portion 2323 and the second stop portion 2723, so that the contraction of the first memory alloy wire 2511 and the second memory alloy wire 2811 in the Y direction can reach the maximum position, and the phenomenon that the contraction displacement of the first memory alloy wire 2511 and the second memory alloy wire 2811 is overlarge is prevented. As the first memory alloy wire 2511 and the second memory alloy wire 2811 may be stuck in the process of current-carrying contraction, the stuck state means that the first memory alloy wire 2511 and the second memory alloy wire 2811 have no contraction amount in the stroke space, but the power supply 40 still continues to supply current to the first memory alloy wire 2511 and the second memory alloy wire 2811 at this time; at this time, the first elastic member 253 and the second elastic member 284 have a buffering function, so that the first memory alloy wire 2511 can be prevented from being damaged or broken.

In some embodiments, the main board 30 may also be used to control to prevent the first memory alloy wire 2511 and the second memory alloy wire 2811 from being stuck, specifically, the main board 30 may detect the stuck state by detecting the resistance values of the first memory alloy wire 2511 and the second memory alloy wire 2811 in real time, and detect the stuck state according to the change of the resistance values, that is, when the detected resistance values reach specific values, the main board 30 controls the power source 40 to respectively reduce the currents to the first memory alloy wire 2511 and the second memory alloy wire 2811 to maintain the state or directly cut off the power source. The specific value is a resistance value when the first memory alloy wire 2511 and the second memory alloy wire 2811 have no shrinkage in a stroke space.

The main board 30 of the electronic device 100 of the present invention controls the driving element 80 through the circuit board 26 to drive the second housing 24 to move relative to the first housing 22, so as to realize the automatic expansion or contraction of the housing 20, the sliding and rolling area 64 of the flexible screen 60 realizes the automatic expansion or rolling along with the second housing 24, the use is convenient, the display surface of the flexible screen 60 can be enlarged after the sliding and rolling area 64 is expanded, the use by a user is convenient, and the volume of the electronic device 100 can be reduced after the sliding and rolling area 64 is rolled, so that the electronic device is convenient for the user to carry; in addition, after the second casing 24 is unfolded relative to the first casing 22, the locking mechanism 21 automatically locks to prevent the second casing 24 from moving relative to the first casing 22, so that the second casing 24 can be prevented from moving relative to the first casing 22 when the electronic device 100 falls, the whole electronic device 100 can be effectively protected, and the flexible screen 60 and the mechanism inside the casing 20 can be prevented from being damaged; secondly, the locking mechanism 21 realizes automatic unlocking or power failure to realize automatic locking by electrifying the first memory alloy wire 2511 and the second memory alloy wire 2811, has simple logic and can realize multi-stage locking or unlocking, the first memory alloy wire 2511 and the second memory alloy wire 2811 have larger energy density, driving strain and driving stress, and the driving voltage required by the first memory alloy wire 2511 and the second memory alloy wire 2811 is low and is easy to obtain; in addition, the locking mechanism 21 has a small weight and a small volume, occupies a small internal space of the housing 20, and facilitates the layout of other components.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A locking mechanism, characterized in that the locking mechanism comprises:

the first locking assembly comprises a first fixing piece, a first locking piece and a first resetting piece arranged between the first fixing piece and the first locking piece, the first locking piece is movably connected to the first fixing piece, the first locking piece comprises a first bolt, and the first resetting piece has elastic force for driving the first locking piece to move and reset relative to the first fixing piece;

the first memory alloy component comprises a first memory alloy piece and a first elastic piece, and the first memory alloy piece is connected with the first elastic piece; and

the end part, far away from the first elastic part, of the first memory alloy part is connected to the circuit board, the end part, far away from the first elastic part, of the first elastic part is connected to the first locking part, and the circuit board controls the first memory alloy part to drive the first locking part to move relative to the first fixing part, so that the first lock tongue extends out of or contracts into the first fixing part.

2. The locking mechanism of claim 1, further comprising a second locking assembly and a second memory alloy element, wherein the second locking assembly comprises a second fixing member, a second locking member movably connected to the second fixing member, and a second resetting member disposed between the second fixing member and the second locking member, the second locking member comprises a second latch tongue, and the second resetting member has an elastic force for driving the second locking member to move and reset relative to the second fixing member; the second memory alloy component comprises a second memory alloy piece and a second elastic piece connected to the second locking piece, the second memory alloy piece is connected to the second elastic piece, the end, far away from the second elastic piece, of the second memory alloy piece is connected to the circuit board, and the circuit board controls the second memory alloy piece to be used for driving the second locking piece to move relative to the second fixing piece, so that the second lock tongue extends out of or is recovered in the second fixing piece.

3. The locking mechanism of claim 2, wherein the first memory alloy assembly further comprises a first connecting member, an end of the first elastic member away from the first locking member is connected to the first connecting member, the first memory alloy member comprises a first memory alloy wire, the first memory alloy wire is hung on the first connecting member, and an end of the first memory alloy wire away from the first connecting member is connected to the circuit board; the second memory alloy subassembly still includes the second connecting piece, the second elastic component is kept away from the one end of second locking part connect in the second connecting piece, the second memory alloy spare includes the second memory alloy silk, the second memory alloy silk is hung and is located the second connecting piece, the second memory alloy silk is kept away from the tip of second connecting piece connect in the circuit board.

4. The locking mechanism of claim 3, wherein the first connecting member comprises a first connecting plate, a first connecting column and a first positioning column, the first connecting column is arranged on the first connecting plate, the first memory alloy wire is hung on the first connecting column, and one end of the first elastic member, which is far away from the first locking piece, is positioned on the first positioning column; the second connecting piece comprises a second connecting plate, a second connecting column and a second positioning column, the second connecting column and the second positioning column are arranged on the second connecting plate, the second memory alloy wire is hung on the second connecting column, and the end part, far away from the second locking piece, of the second elastic piece is positioned on the second connecting column.

5. The locking mechanism of claim 3, wherein the first memory alloy component further comprises a first connection hook connected to an end of the first memory alloy wire, the first connection hook being connected to the circuit board, the first memory alloy wire being electrically connected to the circuit board through the first connection hook; the second memory alloy assembly further comprises a second connecting hook connected to the end of the second memory alloy wire, the second connecting hook is connected to the circuit board, and the second memory alloy wire is electrically connected to the circuit board through the second connecting hook.

6. The locking mechanism of claim 5, wherein the circuit board comprises a rectangular plate having a first end and a second end opposite the first end, the first end being proximate to the second locking element, the second end being proximate to the first locking element, the first connector hook being engaged with the second end, the second connector hook being engaged with the first end, the first memory alloy wire and the second memory alloy wire being spaced apart from each other.

7. The locking mechanism of claim 3, further comprising a positioning frame, wherein the positioning frame includes a fixing portion disposed at a middle portion thereof, the circuit board is fixedly connected to the fixing portion, and the first locking component and the second locking component are disposed at two opposite ends of the positioning frame, respectively.

8. The locking mechanism of claim 7, wherein the positioning frame further comprises a rectangular supporting plate, the fixing portion comprises a fixing post disposed at a middle portion of a side of the supporting plate facing the circuit board, the circuit board is provided with a fixing hole corresponding to the fixing post, and the fixing post is detachably connected to the fixing hole.

9. The locking mechanism of claim 8, wherein a first receiving slot and a second receiving slot are disposed on a side of the positioning frame facing the circuit board, the first receiving slot and the second receiving slot are spaced from each other, the first memory alloy member is received in the first receiving slot, and the second memory alloy member is received in the second receiving slot.

10. The locking mechanism of claim 9, wherein the fixing portion further comprises a plurality of support bars disposed on a side of the positioning frame facing the circuit board, the support bars are spaced apart from each other in parallel, the support bars are parallel to the first receiving groove, the support bars surround the first receiving groove and the second receiving groove, and the support bars are used for supporting the circuit board.

11. The locking mechanism of claim 9, wherein the positioning frame has a first sliding slot and a second sliding slot at opposite ends thereof, the first sliding slot extends along a moving direction of the first locking member and is communicated with the first accommodating slot, the second sliding slot extends along a moving direction of the second locking member and is communicated with the second accommodating slot, the first connecting member is slidably received in the first sliding slot, and the second connecting member is slidably received in the second sliding slot.

12. The locking mechanism of claim 11, wherein a first receiving slot and a second receiving slot are respectively disposed at two opposite ends of the positioning frame, the first sliding slot is located between the first receiving slot and the first receiving slot, the first receiving slot extends along a moving direction of the first locking member and is communicated with the first sliding slot, the second sliding slot is located between the second receiving slot and the second receiving slot, the second receiving slot extends along a moving direction of the second locking member and is communicated with the second sliding slot, the first elastic member is received in the first receiving slot, and the second elastic member is received in the second receiving slot.

13. The locking mechanism as claimed in claim 3, wherein the first fixing member is provided with a first guide groove along a first direction, the first guide groove penetrates through an end surface of the first fixing member facing away from the first memory alloy wire to form a first outlet, the first locking member is slidably accommodated in the first guide groove, and the first locking tongue is driven by the first memory alloy wire to extend out of or retract into the first outlet; the second fixing piece is provided with a second guide groove along the first direction, the second guide groove penetrates through the end face, away from the second memory alloy wire, of the second fixing piece to form a second outlet, the second locking piece is contained in the second guide groove in a sliding mode, and the second lock tongue extends out of or contracts into the second outlet under the driving of the second memory alloy wire.

14. The lock mechanism according to claim 3, wherein a contraction amount of the first memory alloy wire in the sliding direction of the first lock member is larger than a displacement amount of the first lock member with respect to the first fixing member, and a contraction amount of the second memory alloy wire in the sliding direction of the second lock member is larger than a displacement amount of the second lock member with respect to the second fixing member.

15. The locking mechanism of claim 13, wherein the first locking member further comprises a first guide sliding strip slidably connected to the first fixing member, one end of the first guide sliding strip is connected to the first lock tongue, the other end of the first guide sliding strip is connected to the first elastic member, the first reset member is sleeved on the first guide sliding strip, and two opposite ends of the first reset member respectively abut against the first lock tongue and the first fixing member; the second locking part further comprises a second guide sliding strip which is slidably connected to the second fixing part, one end of the second guide sliding strip is connected to the second lock bolt, the other end of the second guide sliding strip is connected to the second elastic part, the second reset part is sleeved on the second guide sliding strip, and two opposite ends of the second reset part respectively abut against the second lock bolt and the second fixing part.

16. The locking mechanism of claim 15, wherein the first locking member further comprises a first connecting portion connected to an end of the first sliding guide strip facing away from the first bolt, and the first connecting portion extends out of the first fixing member and is connected to the first elastic member; the second locking and fixing part further comprises a second connecting part connected to one end, deviating from the second bolt, of the second guide sliding strip, and the second connecting part extends out of the second fixing part and then is connected to the second elastic part.

17. The locking mechanism of claim 16, wherein an end of the first fixing member facing away from the first outlet is provided with a first through hole communicating with the first guide groove, and the first slide guide bar is slidably disposed through the first through hole; one end of the second fixing piece, which deviates from the second outlet, is provided with a second through hole communicated with the second guide sliding groove, and the second guide sliding strip is slidably arranged in the second through hole in a penetrating manner.

18. The lock mechanism as claimed in claim 1, wherein the elastic coefficient of the first reset member is KF, the elastic coefficient of the first elastic member is KB, the displacement of the first memory alloy member after being energized is Δ x2, and the first memory alloy member drives the first latch tongue to move by Δ x1, wherein

19. The lock mechanism as claimed in claim 2, wherein the first and second bolts can be extended out of the first and second mounts synchronously, or the first and second bolts can be retracted into the second mounts synchronously.

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

21. The housing of claim 20 wherein the second housing is provided with a plurality of said first locking apertures along a direction of sliding movement of the second housing relative to the first housing, and wherein the first locking tab is selectively insertable into one of the plurality of said first locking apertures.

22. An electronic device, comprising the housing according to any one of claims 20 to 21 and a power supply disposed in the housing, wherein the power supply is electrically connected to the circuit board and the first memory alloy member, and the circuit board is configured to control the power supply to be powered on or powered off with the first memory alloy member, so as to shrink or reset the first memory alloy member.

23. The electronic device of claim 22, wherein when the power source is energized with the first memory alloy piece, the first memory alloy piece contracts to drive the first latch tongue out of the first locking opening; when the power supply and the first memory alloy part are powered off, the first memory alloy part resets to enable the first lock tongue to be inserted into the first locking port.

24. The electronic device of claim 22, further comprising a stroke detection device electrically connected to the circuit board, wherein the stroke detection device is configured to detect a position where the second housing slides relative to the first housing, and when the second housing slides to a position to be locked relative to the first housing, the stroke detection device detects the position of the second housing and sends a signal to the circuit board, the circuit board receives the signal and controls the power supply and the first memory alloy element to be powered off, the first memory alloy element resets, and the first reset element pushes the first latch tongue to move until the first latch tongue is inserted into the first locking opening.

25. The electronic device of claim 22, further comprising a stroke detection device electrically connected to the circuit board, wherein the stroke detection device is configured to detect a position of the second housing relative to the first housing, calculate a time required for the second housing to move to the locking position relative to the first housing, send a signal to the circuit board, receive the signal by the circuit board, control the power supply to power off the first memory alloy, reset the first memory alloy, push the first reset member against the first lock tongue to move, and move the second housing relative to the first housing continuously until the first lock tongue faces the first locking opening, and insert the first lock tongue into the first locking opening.