CN215186904U

CN215186904U - Protective shell

Info

Publication number: CN215186904U
Application number: CN202121435075.4U
Authority: CN
Inventors: 张泽武; 韩清
Original assignee: Shenzhen Magic Cube Digital Technology Co ltd
Current assignee: Shenzhen Magic Cube Digital Technology Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-12-14
Anticipated expiration: 2031-06-25

Abstract

The utility model discloses a protective housing, including the main casing body with install in the anti-falling subassembly at the main casing body back, the main casing body is equipped with the chamber that holds that loads the mobile device, it is equipped with control module to prevent falling the subassembly, acceleration sensor, gravity sensor, spacing module, shell fragment subassembly and the piece that resets, shell fragment subassembly with prevent falling subassembly rotatable coupling, when normal condition, shell fragment subassembly contracts in preventing falling the subassembly and be the horizontality, when protection state, shell fragment subassembly's tip is rotatory out and is prevented falling the edge of subassembly and be bending state, the piece that resets has the rotatory effort of messenger's shell fragment subassembly from normal condition orientation protection state, spacing module can be connected or separate with shell fragment subassembly selectivity, when falling the state, control shell fragment subassembly rotates towards protection state. Through the use of the acceleration sensor and the gravity sensor in a matched mode, the accuracy of detection of the falling state is improved, and the phenomenon that the user is influenced by mistakenly popping the elastic sheet assembly in the non-falling state is avoided.

Description

Protective shell

Technical Field

The utility model relates to a mobile device accessory technical field especially relates to a protective housing.

Background

With the development of science and technology, mobile phones are used as communication tools more and more widely, and the mobile phones have more and more integrated functions, so that people can not leave the mobile phones more and more in life. Certainly, the more functions are integrated on the mobile phone, the more expensive the mobile phone is, and the price of some brands of mobile phones far exceeds that of a notebook computer, so that people can hold the expensive mobile phone in hands without worry. In the process that a user holds the mobile phone by hand and operates the mobile phone, the mobile phone is easily dropped due to the influence of external environment such as jolting, shaking, collision of other people and the like on a bus or a subway or in the walking process, so that the mobile phone is damaged and the use is influenced. Experiments prove that if the smart phone drops to the ground from a distance of 1.5 meters, the mobile phone shell is sunken and deformed if the smart phone is light, and is cracked if the smart phone is heavy, particularly the glass mobile phone shell. Therefore, people often equip their mobile phones with plastic shells, but the plastic shells can only reduce the impact received when the mobile phones fall on the ground, but cannot completely prevent the mobile phones from being damaged.

Therefore, there is a need to provide a protective case for a mobile phone that is more resistant to falling down, so as to increase the protection performance of the mobile phone.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming and the deficiency that exist among the prior art, the utility model aims to provide a protective housing to solve among the prior art cell-phone protective housing prevent the relatively poor problem of falling nature.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a protective shell, which comprises a main shell body and an anti-falling component arranged on the back of the main shell body, wherein the main shell body is provided with a containing cavity for loading mobile equipment at one side far away from the anti-falling component, the anti-falling component is provided with a control module, an acceleration sensor, a gravity sensor, a limiting module, a spring sheet component and a reset piece, the spring sheet component is rotatably connected with the anti-falling component, the spring sheet component is contracted in the anti-falling component and is in a flat state in a normal state, the end part of the spring sheet component rotates out of the edge of the anti-falling component and is in a bending state in a protective state, the reset piece is arranged between the spring sheet component and the anti-falling component and has an acting force for rotating the spring sheet component from the normal state to the protective state, the acceleration sensor, the gravity sensor and the limiting module are all electrically connected with the control module, the acceleration sensor is used for monitoring an acceleration signal of the anti-falling assembly, the gravity sensor is used for monitoring a gravity signal of the anti-falling assembly, the limiting module can be selectively connected with or separated from the elastic sheet assembly, the control module judges whether the anti-falling assembly is in a falling state or not according to the acceleration signal and the gravity signal, and when the anti-falling assembly is in the falling state, the control module controls the limiting module to be separated from the elastic sheet assembly and enables the elastic sheet assembly to rotate towards the protection state.

Further, this spacing module includes the mount pad, first magnetism spare, second magnetism spare and spacing axle, this mount pad is equipped with the mounting hole, the one end of this spacing axle and this first magnetism spare and this second magnetism spare are located in this mounting hole, this second magnetism spare is located between this first magnetism spare and this spacing axle and with this spacing axle fixed connection, this mount pad is installed on this prevents falling the subassembly, be equipped with on this shell fragment subassembly with this spacing axle complex spacing hole, at least one of them is the electro-magnet of this first magnetism spare and this second magnetism spare, this electro-magnet can control this spacing axle and insert this spacing downthehole or follow this spacing downthehole separation.

Furthermore, the limiting module also comprises an elastic piece, the elastic piece is arranged between the first magnetic piece and the second magnetic piece, and the elastic piece has an acting force for inserting the limiting shaft into the limiting hole; or the elastic piece has the acting force for separating the limiting shaft from the limiting hole.

Furthermore, the elastic piece assembly comprises a first elastic piece and a second elastic piece, and the first elastic piece and the second elastic piece are bent towards the direction away from each other in the protection state.

Furthermore, the elastic sheet assembly further comprises adhesive glue, and the adhesive glue is arranged at the pivoting position of the elastic sheet assembly and fixes the first elastic sheet and the second elastic sheet together.

Furthermore, each elastic sheet component corresponds to one reset piece, one end of each reset piece is connected with the anti-falling component, and the other end of each reset piece is connected with the first elastic sheet or the second elastic sheet.

Further, should prevent falling the subassembly and include first mounting panel, second mounting panel and link together this first mounting panel and this second mounting panel the connecting axle, this control module, this acceleration sensor, this gravity sensor, this spacing module, this shell fragment subassembly and this piece that resets are located between this first mounting panel and this second mounting panel, this shell fragment subassembly be equipped with this connecting axle complex shaft hole, this shell fragment subassembly and this piece cover that resets are located on this connecting axle.

Further, should prevent falling subassembly still includes the nut, this connecting axle be with this nut complex bolt, be equipped with the through-hole on this first mounting panel and this second mounting panel, the tip of this bolt passes this through-hole on this first mounting panel and this second mounting panel and is connected with this nut.

Furthermore, the first mounting plate and the second mounting plate are provided with sinking grooves at the through hole, and one end of the bolt and the nut are mounted in the corresponding sinking grooves.

Further, the main shell comprises a frame, the frame is arranged on the periphery of the anti-falling component and forms the accommodating cavity for loading the mobile equipment together with the anti-falling component; or the main shell comprises a frame and a back plate, the frame is arranged on the periphery of the back plate and forms an accommodating cavity for loading mobile equipment with the back plate, and the anti-falling assembly is arranged on one side of the back plate far away from the frame.

The utility model has the advantages that: whether the control module judges the anti-falling assembly to be in a falling state or not through the acceleration signal and the gravity signal, when the anti-falling assembly is in the falling state, the control module controls the spacing module to be separated from the elastic sheet assembly and enables the elastic sheet assembly to rotate towards a protection state, so that the accuracy of the protective shell for detecting the falling state can be improved, the phenomenon that the elastic sheet assembly is mistakenly popped out under the non-falling state to influence the use of a user is avoided, for example, the user holds the protective shell to mistakenly trigger the elastic sheet assembly to pop out due to the rapid swinging arm when running.

Drawings

Fig. 1 is a schematic structural view of a protective shell in a normal state;

fig. 2 is a schematic bottom view of the protective shell in a normal state according to the present invention;

fig. 3 is a schematic bottom view of the protective shell in the normal state of the present invention;

fig. 4 is a schematic view of the bottom-up disassembled structure of the middle anti-falling assembly of the present invention in a normal state;

fig. 5 is a schematic view of a partially disassembled structure of the middle anti-falling assembly in a normal state;

fig. 6 is a schematic cross-sectional view of the protective shell of the present invention in a normal state;

FIG. 7 is an enlarged partial schematic view of FIG. 6 at A;

fig. 8 is a schematic bottom view of the protective shell in the protection state according to the present invention;

fig. 9 is a schematic cross-sectional view of the protective shell in the protective state of the present invention;

fig. 10 is a partially enlarged structural view at B in fig. 9.

In the figure: the camera comprises a main shell 10, an accommodating cavity 101, a camera hole 102, a first through hole 103, a second through hole 104, a third through hole 105, an avoiding groove 106, a frame 11 and a back plate 12; the anti-falling component 20, the through hole 201, the first mounting plate 20a, the second mounting plate 20b, the connecting shaft 20c, the nut 20d, the control module 21, the acceleration sensor 22, the gravity sensor 23, the limiting module 24, the mounting base 241, the mounting hole 241a, the first magnetic part 242, the second magnetic part 243, the limiting shaft 244, the elastic part 245, the elastic piece component 25, the first elastic piece 25a, the second elastic piece 25b, the limiting hole 251, the adhesive 252, the shaft hole 253, the reset piece 26, the battery 27 and the charging interface 28.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects of the protective housing according to the present invention with reference to the accompanying drawings and preferred embodiments is as follows:

FIG. 1 is a schematic front view of the protective shell of the present invention in a normal state, FIG. 2 is a schematic bottom view of the protective shell of the present invention in a normal state, FIG. 3 is a schematic view of the protective shell of the present invention in a normal state, and FIG. 4 is a schematic view of the anti-falling assembly of the present invention in a normal state, FIG. 5 is a partially disassembled view showing the crash-proof assembly of the present invention in a normal state, FIG. 6 is a cross-sectional view showing the protective shell of the present invention in a normal state, fig. 7 is a partially enlarged schematic view of a portion a in fig. 6, fig. 8 is a schematic view of a protective shell in a protective state according to the present invention, fig. 9 is a schematic sectional structure view of the protective shell in a protective state according to the present invention, and fig. 10 is an enlarged partial structure view of B in fig. 9.

As shown in fig. 1 to 10, the present invention provides a protective casing, which comprises a main casing 10 and an anti-falling component 20 installed at the back of the main casing 10, wherein the anti-falling component 20 can be detachably connected to the main casing 10, such as an adhesive, a buckle or other connection means, so as to conveniently replace the anti-falling component 20 or the main casing 10, and of course, the anti-falling component 20 can also be fixed together with the main casing 10, such as an integral molding.

The main housing 10 is provided with a receiving cavity 101 for loading a mobile device at a side away from the fall prevention assembly 20. The anti-falling assembly 20 is provided with a control module 21, an acceleration sensor 22, a gravity sensor 23, a limiting module 24, a spring assembly 25 and a reset piece 26. The elastic component 25 is rotatably connected to the fall-preventing component 20, and in a normal state, the elastic component 25 is retracted into the fall-preventing component 20 and is in a flat state (fig. 2), and in a protection state, the end of the elastic component 25 is rotated out of the edge of the fall-preventing component 20 and is in a bent state (fig. 8). The reset piece 26 is disposed between the elastic piece assembly 25 and the fall-preventing assembly 20 and has an acting force for rotating the elastic piece assembly 25 from a normal state to a protection state. The acceleration sensor 22, the gravity sensor 23 and the limiting module 24 are all electrically connected with the control module 21. The acceleration sensor 22 is used for monitoring an acceleration signal of the anti-falling assembly 20, that is, sensing an acceleration a generated when the protective shell moves up and down, and performing algorithm integration to provide the acceleration signal of the protective shell for the control module 21. The gravity sensor 23 is used for monitoring a gravity signal of the anti-falling assembly 20, namely, sensing a height difference h generated when the protective shell moves up and down, and performing algorithm integration to provide a signal of kinetic energy of falling of the protective shell for the control module 21. Spacing module 24 can be connected or separate with shell fragment subassembly 25 selectivity, and whether control module 21 is in the state of falling according to acceleration signal and gravity signal judgement anti-falling subassembly 20, when anti-falling subassembly 20 was in the state of falling, control module 21 control spacing module 24 and shell fragment subassembly 25 separation and make shell fragment subassembly 25 rotate towards the protection state. Among them, the control module 21 is preferably a central signal processing Chip (CPU). The reset member 26 is preferably a torsion spring, one end of which is connected to the resilient member 25 and the other end of which is connected to the fall-preventing member 20.

The utility model discloses a whether control module 21 judges the protective housing jointly through acceleration signal and gravity signal and is in the state of falling, for example, only detect acceleration signal and be a when control module 21 and be more than or equal to 8.0m/s²Meanwhile, the protective shell is judged to be in a falling state when the gravity signal is h is larger than or equal to 1.5m, and the values of the acceleration signal and the gravity signal can be adjusted and set according to the requirements of users. When the protective shell is in a falling state, the control module 21 controls the limiting module 24 to be separated from the elastic sheet assembly 25 and enables the elastic sheet assembly 25 to rotate towards a protection state, so that the accuracy of the protective shell for detecting the falling state can be improved, and the situation that a user uses the protective shell because the elastic sheet assembly 25 is mistakenly ejected in a non-falling state is avoided, for example, the user mistakenly triggers the elastic sheet assembly 25 to eject due to the fact that the user holds the protective shell by hands when running.

In this embodiment, the position limiting module 24 is preferably a solenoid valve. As shown in fig. 5, the limiting module 24 includes a mounting base 241, a first magnetic member 242, a second magnetic member 243 and a limiting shaft 244, the mounting base 241 is provided with a mounting hole 241a, one end of the limiting shaft 244, the first magnetic member 242 and the second magnetic member 243 are disposed in the mounting hole 241a, the second magnetic member 243 is located between the first magnetic member 242 and the limiting shaft 244 and is fixedly connected to the limiting shaft 244, and the mounting base 241 is mounted on the anti-falling component 20. The elastic sheet assembly 25 is provided with a limit hole 251 matched with the limit shaft 244, at least one of the first magnetic member 242 and the second magnetic member 243 is an electromagnet, for example, the first magnetic member 242 or the second magnetic member 243 is an electromagnet, and both the first magnetic member 242 and the second magnetic member 243 are electromagnets. The electromagnet can control the limit shaft 244 to be inserted into the limit hole 251 or separated from the limit hole 251, that is, the first magnetic member 242 and the second magnetic member 243 can generate magnetic force attracting each other, so that the limit shaft 244 is separated from the limit hole 251, or the first magnetic member 242 and the second magnetic member 243 can generate repulsive magnetic force, so that the limit shaft 244 is inserted into the limit hole 251.

In this embodiment, the limiting module 24 further includes an elastic member 245, the elastic member 245 is disposed between the first magnetic member 242 and the second magnetic member 243, the elastic member 245 has an acting force that enables the limiting shaft 244 to be inserted into the limiting hole 251, when the limiting module 24 is not powered on, the limiting shaft 244 is inserted into the limiting hole 251 under the action of the elastic member 245, when the limiting module 24 is powered on, the first magnetic member 242 and the second magnetic member 243 generate a magnetic force that attracts each other, so that the limiting shaft 244 separates from the limiting hole 251, and the elastic sheet assembly 25 rotates from a normal state toward a protection state under the action of the resetting member 26. Of course, in other embodiments, the elastic member 245 may also have an acting force that separates the limiting shaft 244 from the limiting hole 251, when the limiting module 24 is powered on, the first magnetic member 242 and the second magnetic member 243 can generate a repulsive magnetic force, so that the limiting shaft 244 is inserted into the limiting hole 251, when the limiting module 24 is not powered on, the limiting shaft 244 is separated from the limiting hole 251 under the action of the elastic member 245, and the elastic sheet assembly 25 rotates from the normal state toward the protection state under the action of the resetting member 26. Alternatively, without providing the elastic member 245, in different states, voltages with opposite polarities are applied to the limiting module 24, so that a mutually repulsive magnetic force is generated between the first magnetic member 242 and the second magnetic member 243, and the limiting shaft 244 is inserted into the limiting hole 251, or a mutually attractive magnetic force is generated, so that the limiting shaft 244 is separated from the limiting hole 251. However, the latter two embodiments require a voltage to be applied to the position limiting module 24 all the time in a normal state, which results in higher power consumption, but these two embodiments are not excluded.

In this embodiment, as shown in fig. 4, 5 and 8, the elastic member 25 has four sets, wherein three sets are disposed at the corner of the fall-preventing member 20, and the other set is disposed near the camera hole 102. Each set of spring assembly 25 includes a first spring 25a and a second spring 25b, and the first spring 25a and the second spring 25b are preferably made of a memory material, such as titanium alloy, so as to be able to bend automatically when rotated to a protection state. When in the protection state, the first elastic sheet 25a and the second elastic sheet 25b are bent towards the direction away from each other, so that the protective shell can be protected in all directions.

In this embodiment, the elastic sheet assembly 25 further includes an adhesive 252, and the adhesive 252 is disposed at the pivot of the elastic sheet assembly 25 and fixes the first elastic sheet 25a and the second elastic sheet 25b together. Each elastic sheet component 25 corresponds to a reset piece 26, one end of each reset piece 26 is connected with the anti-falling component 20, and the other end of each reset piece 26 is connected with the first elastic sheet 25a or the second elastic sheet 25 b. Of course, in other embodiments, the adhesive 252 need not be provided, each elastic sheet assembly 25 corresponds to two resetting pieces 26, the first elastic sheet 25a and the second elastic sheet 25b respectively correspond to one resetting piece 26, one resetting piece 26 is used for driving the first elastic sheet 25a to rotate, and the other resetting piece 26 is used for driving the second elastic sheet 25b to rotate.

Further, as shown in fig. 4 and 5, the drop prevention assembly 20 includes a first mounting plate 20a, a second mounting plate 20b, and a connecting shaft 20c connecting the first mounting plate 20a and the second mounting plate 20b together. Control module 21, acceleration sensor 22, gravity sensor 23, spacing module 24, shell fragment subassembly 25 and reset piece 26 locate between first mounting panel 20a and the second mounting panel 20b, and shell fragment subassembly 25 is equipped with connecting axle 20c complex shaft hole 253, and shell fragment subassembly 25 and reset piece 26 cover are located on connecting axle 20c to make shell fragment subassembly 25 can rotate around connecting axle 20 c. Wherein, first mounting panel 20a and second mounting panel 20b adopt the aluminum alloy to make, play inside components and parts of protection and assembly effect

In this embodiment, the anti-falling assembly 20 further includes a nut 20d, the connecting shaft 20c is a bolt matched with the nut 20d, the first mounting plate 20a and the second mounting plate 20b are provided with a through hole 201, and one end of the bolt passes through the through hole 201 on the first mounting plate 20a and the second mounting plate 20b and is connected with the nut 20d, i.e., the bolt is used for connecting the first mounting plate 20a and the second mounting plate 20b and also serves as a rotating shaft.

Further, the first and

second mounting plates

20a and 20b are provided with a sinking groove at the through hole 201, and the end of the bolt and the nut 20d are mounted in the corresponding sinking groove, so that the nut 20d and the bolt do not protrude from the surfaces of the first and

second mounting plates

20a and 20b away from each other.

In this embodiment, the main housing 10 includes a bezel 11 and a back plate 12, the bezel 11 is disposed on a periphery of the back plate 12 and forms an accommodating cavity 101 with the back plate 12 for loading a mobile device, and the anti-falling component 20 is mounted on a side of the back plate 12 away from the bezel 11. Of course, in other embodiments, the main housing 10 is provided with only the rim 11, and the rim 11 is provided at the periphery of the anti-falling component 20 and forms the receiving cavity 101 with the anti-falling component 20 for loading the mobile device, i.e. the main housing 10 and the anti-falling component 20 share the first mounting plate 20a, and the first mounting plate 20a is used as a back plate of the main housing 10. The main housing 10 is made of TPU or PC, and thus functions to protect the mobile phone after the mobile phone is assembled.

Further, as shown in fig. 4, the anti-falling assembly 20 is further provided with a battery 27 and a charging interface 28, and the battery 27 is electrically connected with the control module 21 through the acceleration sensor 22 and the gravity sensor 23, so as to provide electric energy to the whole anti-falling assembly 20. The charging interface 28 is electrically connected to the battery 27, thereby charging the battery 27. Of course, in other embodiments, the anti-falling component 20 is provided with a wireless charging module, so that the anti-falling component 20 can be provided with electric energy through the reverse wireless charging function of the mobile phone.

Further, as shown in fig. 1 to 3, the main housing 10 and the anti-falling component 20 are provided with a camera hole 102 at a corresponding position, the camera hole being matched with a rear camera of the mobile device, the main housing 10 is further provided with a first through hole 103 corresponding to a charging interface of the mobile device, a second through hole 104 corresponding to a speaker and a microphone of the mobile device, and a third through hole 105 corresponding to a mute switch key of the mobile device, and the main housing 10 is further provided with an avoiding groove 106 corresponding to a volume button and a switch key of the mobile device. The camera hole 102 is disposed on the back plate 12, the first mounting plate 20a, and the second mounting plate 20b, and the first through hole 103, the second through hole 104, the third through hole 105, and the avoiding groove 106 are disposed on the frame 12.

As shown in fig. 2 and 7, when in the normal state, the torsion spring (the reset member 26) is in the rotation compression state, the electromagnetic valve (the limiting module 24) is not energized, so that there is no interaction magnetic force between the two magnetic members, and the spring (the elastic member 245) is in the natural state and causes the limiting shaft 244 to extend outward and be inserted into the limiting hole 251 of the elastic sheet assembly 25, so as to limit the pop-up of the elastic sheet assembly 25 and be in the flat state. As shown in fig. 8 and 10, when the protective shell is in the protection state (i.e. when both the acceleration sensor 22 and the gravity sensor 23 detect that the protective shell is in the falling state, the control module 21 is triggered to drive the limiting module 24 to release the limitation on the elastic sheet assembly 25), at this time, the solenoid valve (the limiting module 24) is powered on, so that the two magnetic members generate the magnetic force attracting each other and compress the spring (the elastic member 245) to push the limiting shaft 244 to retract inwards to disengage from the limiting hole 251, so that the elastic sheet assembly 25 is ejected out of the edge of the anti-falling assembly 20 and is in the bending state under the restoring force of the torsion spring (the resetting member 26), and the bent portion of the elastic sheet assembly 25 plays a role of buffering and protecting the protective shell.

In this document, the terms of upper, lower, left, right, front, rear and the like are used to define the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make some changes or modifications within the technical scope of the present invention without departing from the technical scope of the present invention, and the technical contents of the above disclosure can be utilized to make equivalent embodiments, but the technical contents of the present invention are not broken away from, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a protective housing, a serial communication port, including main casing body (10) and install in this main casing body (10) back prevent falling subassembly (20), this main casing body (10) is equipped with holding chamber (101) that is used for loading mobile device keeping away from this one side of preventing falling subassembly (20), this prevent falling subassembly (20) is equipped with control module (21), acceleration sensor (22), gravity sensor (23), spacing module (24), shell fragment subassembly (25) and reset piece (26), this shell fragment subassembly (25) and this prevent falling subassembly (20) rotatable coupling, when normal condition, this shell fragment subassembly (25) shrink in this prevent falling subassembly (20) and be the leveling state, when protection state, the tip of this shell fragment subassembly (25) is rotatory to be gone out this edge of preventing falling subassembly (20) and be crooked state, this reset piece (26) are located between this shell fragment subassembly (25) and this prevent falling subassembly (20) and have and make this shell fragment subassembly (25) from this normal state towards this fall subassembly (20) towards this The rotatory effort of protection state, this acceleration sensor (22), this gravity sensor (23) and this spacing module (24) all with this control module (21) electric connection, this acceleration sensor (22) are used for monitoring this acceleration signal who prevents falling subassembly (20), this gravity sensor (23) are used for monitoring this gravity signal who prevents falling subassembly (20), this spacing module (24) can be connected or separate with this shell fragment subassembly (25) selectivity, this control module (21) judge this should prevent falling subassembly (20) whether in the state of falling according to this acceleration signal and this gravity signal, when this should prevent falling subassembly (20) is in the state of falling, this control module (21) control this spacing module (24) and this shell fragment subassembly (25) separation and make this shell fragment subassembly (25) rotate towards this protection state.

2. A protective casing according to claim 1, characterised in that the spacing module (24) comprises a mounting base (241), a first magnetic member (242), a second magnetic member (243) and a spacing shaft (244), the mounting seat (241) is provided with a mounting hole (241a), one end of the limiting shaft (244) and the first magnetic piece (242) and the second magnetic piece (243) are arranged in the mounting hole (241a), the second magnetic part (243) is positioned between the first magnetic part (242) and the limit shaft (244) and is fixedly connected with the limit shaft (244), the mounting seat (241) is mounted on the anti-falling component (20), the elastic sheet component (25) is provided with a limit hole (251) matched with the limit shaft (244), at least one of the first magnetic member (242) and the second magnetic member (243) is an electromagnet, the electromagnet can control the limit shaft (244) to be inserted into the limit hole (251) or separated from the limit hole (251).

3. The protective case of claim 2, wherein the position limiting module (24) further comprises an elastic member (245), the elastic member (245) is disposed between the first magnetic member (242) and the second magnetic member (243), the elastic member (245) has a force to insert the position limiting shaft (244) into the position limiting hole (251); or the elastic member (245) has a force for separating the stopper shaft (244) from the stopper hole (251).

4. A protective casing according to claim 1, wherein the resilient member (25) comprises a first resilient member (25a) and a second resilient member (25b), the first resilient member (25a) and the second resilient member (25b) being curved away from each other in the protective state.

5. A protective casing according to claim 4, wherein the resilient member (25) further comprises an adhesive (252), the adhesive (252) being provided at the pivot of the resilient member (25) and securing the first resilient member (25a) and the second resilient member (25b) together.

6. A protective casing according to claim 5, wherein each of the resilient members (25) corresponds to a reset element (26), one end of the reset element (26) is connected to the fall-prevention element (20), and the other end of the reset element (26) is connected to the first resilient tab (25a) or the second resilient tab (25 b).

7. A protective case according to claim 1, wherein the fall-preventing assembly (20) includes a first mounting plate (20a), a second mounting plate (20b), and a connecting shaft (20c) connecting the first mounting plate (20a) and the second mounting plate (20b), the control module (21), the acceleration sensor (22), the gravity sensor (23), the limiting module (24), the spring assembly (25), and the reset member (26) are disposed between the first mounting plate (20a) and the second mounting plate (20b), the spring assembly (25) is provided with a shaft hole (253) engaged with the connecting shaft (20c), and the spring assembly (25) and the reset member (26) are sleeved on the connecting shaft (20 c).

8. A protective casing according to claim 7, characterised in that the fall arrest assembly (20) further comprises a nut (20d), the connecting shaft (20c) is a bolt which cooperates with the nut (20d), the first mounting plate (20a) and the second mounting plate (20b) are provided with a through hole (201), and one end of the bolt passes through the through hole (201) of the first mounting plate (20a) and the second mounting plate (20b) and is connected with the nut (20 d).

9. A protective casing according to claim 8, characterised in that the first mounting plate (20a) and the second mounting plate (20b) are provided with countersunk grooves at the through holes (201), the ends of the bolts and the nuts (20d) being mounted in the corresponding countersunk grooves.

10. A protective case according to claim 1, wherein the main case (10) comprises a rim (11), the rim (11) being provided at a periphery of the fall-resistant assembly (20) and forming with the fall-resistant assembly (20) the receiving cavity (101) for loading a mobile device; or the main shell (10) comprises a frame (11) and a back plate (12), the frame (11) is arranged on the periphery of the back plate (12) and forms the accommodating cavity (101) for loading the mobile equipment with the back plate (12), and the anti-falling component (20) is mounted on one side of the back plate (12) far away from the frame (11).