Patent Publication Number: US-2021195005-A1

Title: Mobile Terminal and Photographing System

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     The present application is a continuation-application of International (PCT) Patent Application No. PCT/CN2019/095737 filed on Jul. 12, 2019, which claims priority of Chinese Patent Application No. 201821460525.3, filed on Sep. 6, 2018, the entire contents of both of which are hereby incorporated by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to the field of mobile terminals, and in particular to a mobile terminal and a photographing system. 
     BACKGROUND 
     A typical mobile terminal (a mobile phone, a tablet, etc.) may be configured with a camera, and the camera may be configured to provide functions such as video calling and image capturing, and a scene to be captured by the camera may be relatively single. 
     SUMMARY 
     According to a first aspect of the present disclosure, a mobile terminal is provided and includes following components. 
     A terminal device includes a display screen, a first power module, and a first wireless communication module, wherein the first power module is configured to supply power for the display screen and the first wireless communication module, a side of the terminal device opposite to a display region of the display screen defines a mounting groove. 
     An image capturing device includes a cover, a camera module, a second power module, and a second wireless communication module, wherein the second power module is configured to supply power for the camera module and the second wireless communication module, the camera module and the second power module are disposed inside the cover, the camera module has a light incidence face exposed from the cover, the image capturing device is capable of being received in the mounting groove to allow the light incidence face to be exposed from the side of the terminal device opposite to the display region, the cover defines a slot. 
     A first elastic member is connected to the terminal device and protruding from a wall of the mounting groove and extending towards the mounting groove. 
     A lock tongue is slidably connected to the terminal device and is capable of sliding to reach a first position and a second position. After the image capturing device is received in the mounting groove, the lock tongue is at least partially received in the slot and fastened with a wall of the slot, the image capturing device is locked in the mounting groove, and the first elastic member abuts against the image capturing device, when the lock tongue is at the first position. The lock tongue is released from the slot, and the first elastic member is configured to eject the image capturing device out of the mounting groove to allow the image capturing device to be detached from the mounting groove, when the lock tongue is at the second position. 
     According to a second aspect of the present disclosure, a mobile terminal is provided and includes following components. 
     A terminal device includes a display screen and a first wireless communication module, wherein the display screen has a display region, and a side of the terminal device opposite to the display region defines a mounting groove. 
     An image capturing device is detachably connected to the terminal device and includes a cover, a camera module, and a second wireless communication module. The cover defines a slot, the camera module is disposed inside the cover. The camera module has a light incidence face. When the image capturing device is received in the mounting groove, the light incidence face is exposed from the side of the terminal device opposite to the display region. The image capturing device is communicatively connected to the first wireless communication module through the second wireless communication module. 
     A first elastic member is connected to the terminal device, protruding from a wall of the mounting groove and extending towards the mounting groove. 
     A lock tongue is slidably connected to the terminal device. The lock tongue is capable of sliding to reach a first position and a second position. When the image capturing device is received in the mounting groove, the lock tongue is slidable to reach the first position, and the lock tongue is fastened with a wall of the slot to maintain the image capturing device to be received in the mounting groove, and the first elastic member abuts against the image capturing device. The lock tongue is slidable to reach the second position to be released from the slot, and the first elastic member is configured to eject the image capturing device out of the mounting groove. 
     According to a third aspect of the present disclosure, a photographing system is provided and is capable of switching between a first state and a second state. The photographing system includes a first device, a second device, and an engaging assembly. The first device includes a body and a first communication module. The body includes a front side, a rear side opposite to the front side, the first communication module is disposed inside the body, and the rear side is recessed inwardly to define a first chamber and a second chamber. The second device includes a cover, a camera module, and a second communication module. The cover defines a slot, the camera module and the second power module are disposed inside the cover, the camera module has a light incidence face, the light incidence face is exposed from the cover of the second device, and the second communication module is communicatively connected to the first communication module. The engaging assembly includes a lock tongue and an elastic member. The lock tongue is at least partially received in the second chamber and is slidable relative to the rear side to be received in the first chamber or to be taken out of the first chamber. The elastic member is connected to the first device and disposed on a wall of the first chamber. When the photographing system is in the first state, the second device is received in the first chamber, the lock tongue is at least partially received in the first chamber, further received in the slot, and fastened with a wall of the slot, the elastic member is elastically deformed and abuts against the second device, and the light incidence face is exposed from the rear side of the first device. When the lock tongue slides to be out of the first chamber, the second device is capable of being taken out of the first chamber and the photographing system is in the second state. When the photographing system is in the second state, the second device is released from the first chamber, the lock tongue is at least partially received in the first chamber, and the elastic member protrudes from the wall of the first chamber and is at least partially received in the first chamber. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In order to clearly describe technical solutions of the embodiments of the present disclosure or in the prior art, accompanying drawings for the description of the embodiments or the prior art will be introduced in brief. Obviously, the drawings in the following description are only some embodiments of the present disclosure. Any ordinary skilled in the art may obtain other drawings based on the following drawings without creative work. 
         FIG. 1  is a perspective view of an image capturing device received in a mounting groove of a mobile terminal according to an embodiment of the present disclosure. 
         FIG. 2  is a front view of the image capturing device received in the mounting groove of the mobile terminal shown in  FIG. 1 . 
         FIG. 3  is a perspective view of the image capturing device taken out of the mounting groove of the mobile terminal shown in  FIG. 2 . 
         FIG. 4  is an enlarged view of a portion C of the mobile terminal shown in  FIG. 3 . 
         FIG. 5  is an exploded perspective view of the image capturing device of the mobile terminal shown in  FIG. 3 . 
         FIG. 6  is a perspective view of the image capturing device of the mobile terminal shown in  FIG. 5 , omitting a cover shell. 
         FIG. 7  is a cross-sectional view of the mobile terminal shown in  FIG. 2 , taken along the line VII-VII. 
         FIG. 8  is an enlarged view of a portion D of the mobile terminal shown in  FIG. 7 . 
         FIG. 9  is a cross-sectional view of the mobile terminal shown in  FIG. 2  taking along the line IX-IX. 
         FIG. 10  is an application scenario of the image capturing device of the mobile terminal shown in  FIG. 3 . 
         FIG. 11  is an enlarged view of a portion E of the mobile terminal shown in  FIG. 7 . 
     
    
    
     DETAILED DESCRIPTION 
     In order to facilitate the understanding of the present disclosure, the present disclosure will be the comprehensively described by referring to the accompanying drawings. The drawings show preferred embodiments of the present disclosure. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to enable the present disclosure to be understood more thoroughly and comprehensively. 
     The “terminal device” hereinafter may refer to, but is not limited to, a device that receives and/or sends communication signals and is connected via one or more of the following connection manners: 
     (1) connected via a wired line, such as public switched telephone networks (PSTN), a digital subscriber line (DSL), a digital cable, and direct cable connection; 
     (2) connected via a wireless interface, such as a cellular network, a Wireless Local Area Network (WLAN), a digital TV network such as a DVB-H network, a satellite network, and an AM-FM broadcast transmitter. 
     A terminal device set to communicate through a wireless interface may be referred to as the “mobile terminal.” Examples of mobile terminals may include but are not limited to the following electronic devices: 
     (1) a satellite phone or a cellular phone; 
     (2) a personal communication system (PCS) terminal that combines a cellular radio telephone with data processing, faxing and data communication capabilities; 
     (3) a radio telephone, a pager, an Internet/Intranet access, a Web browser, a notebook, a calendar, a personal digital assistant (PDA) installed with a Global Positioning System (GPS) receiver; 
     (4) a conventional laptop and/or palmtop receiver; 
     (5) a conventional laptop and/or palmtop radio telephone transceiver, etc. 
     According to a first aspect of the present disclosure, a mobile terminal is provided and includes following components. A terminal device includes a display screen, a first power module, and a first wireless communication module, wherein the first power module is configured to supply power for the display screen and the first wireless communication module, a side of the terminal device opposite to a display region of the display screen defines a mounting groove. An image capturing device includes a cover, a camera module, a second power module, and a second wireless communication module, wherein the second power module is configured to supply power for the camera module and the second wireless communication module, the camera module and the second power module are disposed inside the cover, the camera module has a light incidence face exposed from the cover, the image capturing device is capable of being received in the mounting groove to allow the light incidence face to be exposed from the side of the terminal device opposite to the display region, the cover defines a slot. A first elastic member is connected to the terminal device and protruding from a wall of the mounting groove and extending towards the mounting groove. A lock tongue is slidably connected to the terminal device and is capable of sliding to reach a first position and a second position. After the image capturing device is received in the mounting groove, the lock tongue is at least partially received in the slot and fastened with a wall of the slot, the image capturing device is locked in the mounting groove, and the first elastic member abuts against the image capturing device, when the lock tongue is at the first position. The lock tongue is released from the slot, and the first elastic member is configured to eject the image capturing device out of the mounting groove to allow the image capturing device to be detached from the mounting groove, when the lock tongue is at the second position. 
     In some embodiments, the terminal device includes a rear wall and a side wall connected to an outer periphery of the display screen; the rear wall is disposed on the side of the terminal device opposite to the display region and is connected to the side wall; the side wall includes a left side wall, a right side wall opposite to the left side wall, a top side wall, and a bottom side wall opposite to the top side wall; the left side wall and the right side wall are disposed between the top side wall and the bottom side wall; the top side wall and the bottom side wall are disposed between the left side wall and the right side wall; the mounting groove extends through the rear wall; the mounting groove is defined between the left side wall and the right side wall, and is defined between the top side wall and the bottom side wall. 
     In some embodiments, a side of the rear wall opposite to the display region defines a groove extending through a thickness of the rear wall; the lock tongue includes a body portion and a slide block connected to the body portion; the slide block extends through the groove; and the body portion is switched between the first position and the second position by sliding engagement between the slide block and the groove. 
     In some embodiments, the groove includes a slide groove and a reservation groove communicating with the slide groove; the slide block includes a limiting portion and a connection portion, the limiting portion and the connection portion are connected with each other to be an integral structure; the connection portion is received in and extends through the reservation groove and is detachably connected to the body portion; the limiting portion is slidably received in the slide groove and is exposed from the side of the rear wall opposite to the display region. 
     In some embodiments, a size of a cross section of the reservation groove is greater than that of the connection portion, and the size of the cross section of the reservation groove is less than that of the limiting portion. 
     In some embodiments, the mobile terminal further includes a second elastic member. One end of the second elastic member abuts against the body portion, the other end of the second elastic member abuts against the terminal device. The second elastic member is configured to push the body portion from the second position to the first position to allow the body portion to be at least partially received in the mounting groove. 
     In some embodiments, the terminal device has a first groove wall and a second groove wall opposite to the first groove wall; compared to the second groove wall, the first groove wall is closer to the top side wall; the body portion protrudes from the second groove wall when the lock tongue is at the first position; the first groove wall is arranged with a protrusion, the protrusion protrudes from the first groove wall and extends towards the mounting groove; the cover defines a positioning recess; and after the image capturing device is received in the mounting groove, the protrusion is received in the positioning recess and fastened with a wall of the positioning recess. 
     In some embodiments, the second groove wall is inclined towards a side at which the bottom side wall is disposed to serve as a draft angle. 
     In some embodiments, the image capturing device includes a module contact, the terminal device includes a device contact. When the image capturing device is received in the mounting groove, the module contact is in contact with and connected to the device contact to allow the terminal device to charge the image capturing device. 
     In some embodiments, the image capturing device includes a module main board disposed inside the cover; the second power module is stacked on the module main board and is configured to supply power for the module main board; the module main board is communicatively connected to the camera module and the second wireless communication module; the module main board defines a first through hole, the camera module includes a lens tube, the light incidence face is exposed at an end of the lens tube, and the lens tube extends through the first through hole. 
     In some embodiments, the second power module defines a second through hole, the second through hole communicates with the first through hole, and the lens tube extends through the second through hole. 
     According to a second aspect of the present disclosure, a mobile terminal is provided and includes following components. A terminal device includes a display screen and a first wireless communication module, wherein the display screen has a display region, and a side of the terminal device opposite to the display region defines a mounting groove. An image capturing device is detachably connected to the terminal device and includes a cover, a camera module, and a second wireless communication module. The cover defines a slot, the camera module is disposed inside the cover. The camera module has a light incidence face. When the image capturing device is received in the mounting groove, the light incidence face is exposed from the side of the terminal device opposite to the display region. The image capturing device is communicatively connected to the first wireless communication module through the second wireless communication module. A first elastic member is connected to the terminal device, protruding from a wall of the mounting groove and extending towards the mounting groove. A lock tongue is slidably connected to the terminal device. The lock tongue is capable of sliding to reach a first position and a second position. When the image capturing device is received in the mounting groove, the lock tongue is slidable to reach the first position, and the lock tongue is fastened with a wall of the slot to maintain the image capturing device to be received in the mounting groove, and the first elastic member abuts against the image capturing device. The lock tongue is slidable to reach the second position to be released from the slot, and the first elastic member is configured to eject the image capturing device out of the mounting groove. 
     In some embodiments, the terminal device includes a rear wall and a side wall connected to an outer periphery of the display screen; the rear wall is disposed on the side opposite to the display region and is connected to the side wall; and the mounting groove is defined to extend through a thickness of the rear wall. 
     In some embodiments, the cover includes a front end face, a rear end face opposite to the front end face, and a side end face connected between the front end face and the rear end face; the side end face includes a left end face, a right end face opposite to the left end face, a top end face, and a bottom end face opposite to the top end face; the left end face and the right end face are disposed between the top end face and the bottom end face; the top end face and the bottom end face are disposed between the left end face and the right end face; the light incidence face is exposed from the front end face. When the image capturing device is received in the mounting groove, the front end face flushes with an outer surface of the rear wall. 
     In some embodiments, a side of the rear wall opposite to the display region further defines a receiving groove communicating with the mounting groove; the lock tongue includes a body portion and a slide block connected to the body portion; the slide block is received in the receiving groove; and the slide block is slidable along the receiving groove to drive the body portion to switch between the first position and the second position. 
     In some embodiments, the groove includes a slide groove and a reservation groove; the slide block includes a limiting portion and a connection portion, the limiting portion and the connection portion are connected with each other; the connection portion is received in and extends through the reservation groove and is connected to the body portion; the limiting portion is slidably received in the slide groove and is exposed from the side of the rear wall opposite to the display region. 
     In some embodiments, a size of a cross section of the reservation groove is greater than that of the connection portion, and the size of the cross section of the reservation groove is less than that of the limiting portion. 
     According to a third aspect of the present disclosure, a photographing system is provided and is capable of switching between a first state and a second state. The photographing system includes a first device, a second device, and an engaging assembly. The first device includes a body and a first communication module. The body includes a front side, a rear side opposite to the front side, the first communication module is disposed inside the body, and the rear side is recessed inwardly to define a first chamber and a second chamber. The second device includes a cover, a camera module, and a second communication module. The cover defines a slot, the camera module and the second power module are disposed inside the cover, the camera module has a light incidence face, the light incidence face is exposed from the cover of the second device, and the second communication module is communicatively connected to the first communication module. The engaging assembly includes a lock tongue and an elastic member. The lock tongue is at least partially received in the second chamber and is slidable relative to the rear side to be received in the first chamber or to be taken out of the first chamber. The elastic member is connected to the first device and disposed on a wall of the first chamber. When the photographing system is in the first state, the second device is received in the first chamber, the lock tongue is at least partially received in the first chamber, further received in the slot, and fastened with a wall of the slot, the elastic member is elastically deformed and abuts against the second device, and the light incidence face is exposed from the rear side of the first device. When the lock tongue slides to be out of the first chamber, the second device is capable of being taken out of the first chamber and the photographing system is in the second state. When the photographing system is in the second state, the second device is released from the first chamber, the lock tongue is at least partially received in the first chamber, and the elastic member protrudes from the wall of the first chamber and is at least partially received in the first chamber. 
     In some embodiments, the lock tongue includes a body portion and a slide block connected to the body portion; the slide block extends through the second chamber; the body portion is switched between a first position and a second position by sliding the slide block in the second chamber, when the photographing system is in the first state, the body portion is at the first position, and when the photographing system is in the second state, the body portion is at the second position; the second chamber includes a slide groove and a reservation groove communicating with the slide groove; the slide block includes a limiting portion and a connection portion, the limiting portion and the connection portion are connected with each other to be an integral structure; the connection portion is received in and extends through the reservation groove and is detachably connected to the body portion; and the limiting portion is slidably received in the slide groove and is exposed from the side of the rear wall opposite to the display region. 
     In some embodiments, the photographing system further includes another elastic member. One end of the another elastic member abuts against the body portion, the other end of the another elastic member abuts against the first device. The another elastic member is configured to push the body portion from the second position to the first position to allow the body portion to be at least partially received in the first chamber. 
     As shown in  FIG. 1 ,  FIG. 2 , and  FIG. 3 , in one embodiment, a mobile terminal  10  may be a smart mobile phone. The mobile terminal  10  may include a terminal device  100 , an image capturing device  200 , a first elastic member  300  and a lock tongue  400 . The terminal device  100  may include a display screen  120 , a first power module  170 , and a first wireless communication module  180 . The first power module  170  may supply power for display screen  120  and the first wireless communication module  180 . The display screen  120  may be configured to display information and to provide an interaction interface for a user. As shown in  FIG. 4 , a side of the terminal device  100  away from a display region of the display screen  120  may define a mounting groove  130 . Further, as shown in  FIG. 5  and  FIG. 6 , the image capturing device  200  may include a cover  210 , a camera module  220 , a second power module  230 , and a second wireless module. The second power module  230  may supply power for the camera module  220  and the second wireless communication module  250 . The camera module  220  and the second power module  230  may be disposed inside the cover  210 . The camera module  220  may have a light incidence face  221 , and the light incidence face  221  may be exposed from the cover  210 . An ambient light may pass through the light incidence face  221  to reach a photosensitive element of the camera module  220 . The image capturing device  200  may be received in the mounting groove  130 , such that the light incidence face  221  may be exposed from the side of the terminal device away from the display region of the display screen  120 . The cover  210  may define a slot  211 . 
     As shown in  FIG. 4 , the first elastic member  300  may be connected to the terminal device  100 , protruding from a wall of the mounting groove  130  and extending towards the mounting groove  130 . As shown in  FIG. 7  and  FIG. 8 , the lock tongue  400  may be slidably connected to the terminal device  100 , and more specifically, the lock tongue  400  may slide to reach a first position and a second position. As shown in  FIG. 8 , after the image capturing device  200  is received in the mounting groove  130 , the lock tongue  400  may slide to the first position. In detail, when the lock tongue  400  is at the first position, the lock tongue  400  may be received in the slot  211  and fastened with a wall of the slot  211 . The image capturing device  200  may be securely received in the mounting groove  130 , and the first elastic member  300  may abut against the image capturing device  200  and may be elastically deformed by the image capturing device  200 . When the lock tongue  400  slides to reach the second position, the lock tongue  400  may be released out of the slot  211 . Further as shown in  FIG. 9 , the first elastic member  300  may eject the image capturing device  200  out of the mounting groove  130  such that the image capturing device  200  may be detached from the mounting groove  130 . After detaching the image capturing device  200  from the mounting groove  130 , the second wireless communication module  250  may be communicatively connected to the first wireless communication module  180 , such that the image capturing device  200  may be communicatively connected to the terminal device  100 . In other embodiments, the mobile terminal  10  may be a tablet. 
     The first wireless communication module  180  and the second communication module may be configured for data transmission between the terminal device  100  and the image capturing device  200 . A near field communication technology may be applied in the first wireless communication module  180  and the second wireless communication module  250 , and a same communication protocol may be applied in the first wireless communication module  180  and the second wireless communication module  250 . For example, both of the first wireless communication module  180  and the second wireless communication module  250  may be Bluetooth communication modules, Wireless Fidelity (Wi-Fi) communication module, infrared data association (IrDA) modules, ZigBee communication modules, ultra wideband modules, or near field communication (NFC) modules, etc. In one embodiment, the terminal device  100  may include a third wireless communication module, and the third wireless communication module may be configured to communicatively connect to an external device, such as a base station or other mobile terminals  10 , such that various mobile terminals  10  may communicate easily. 
     It should be understood that, in response to the image capturing device  200  being securely received in the mounting groove  130 , the image capturing device  200  may communicatively connect to the first wireless communication module  180  through the second wireless communication module  250 . In this situation, the camera module  220  is able to serve as a rear camera. The user may use the image capturing device  200  to capture an image distantly, to record a video, and the like. After the image capturing device  200  is detached from the mounting groove  130 , the second wireless communication module  250  may be communicatively connected to the first wireless communication module  180 . In this situation, the user may use the image capturing device  200  to capture images from various angles and to capture various scenes. 
     In the mobile terminal  10  as described in the above, the image capturing device  200  may be securely received in the mounting groove  130  and detached from the mounting groove  130 . After the image capturing device  200  being detached from the mounting groove  130 , the image capturing device  200  may communicatively connect to the first wireless communication module  180  of the terminal device  100  through the second wireless communication module  250 , and the user may use the image capturing device  200  to capture images from various angles and to capture various scenes. As shown in  FIG. 10 , in one embodiment, the user may use one hand to hold the image capturing device  200 , and use the other hand to hold the terminal device  100 . The user may use the image capturing device  200  to capture images from various positions and various angles, and view the captured images through the display screen  120  of the terminal device  100 . In another example, the user may place the image capturing device  200  at a certain location, and stand at another location and view the images captured by the image capturing device  200  through the terminal device  100 . It should be understood that, as the image capturing device  200  is able to be detached from the terminal device  100 , and is able to communicatively connect to the terminal device  100  after being detached, a front camera may not be required to be configured on a side of the terminal device  100  on which the display screen  120  is disposed. Therefore, a screen-to-body ratio of the terminal device  100  may be improved. For example, by configuring the terminal device  100  in the above-mentioned structure, the screen-to-body ratio may be over 85%. It should be understood that configuration of the first elastic member  300  and the lock tongue  400  may enable the image capturing device  200  to be fixedly received in the mounting groove  130 , preventing the image capturing device  200  from being released out of the mounting groove  130  easily. When the lock tongue  400  is released from the slot  211  by unfastening with the wall of the slot  211 , the first elastic member  300  may eject the image capturing device  200  out of the mounting groove  130 , such that the user may take the image capturing device  200  easily. 
     As shown in  FIGS. 1 to 3 , the terminal device  100  may substantially be a rectangular cube. The terminal device  100  may include a rear wall  111  and a side wall connected to an outer periphery of the display screen  120 . The rear wall  111  may be disposed on the side of the terminal device  100  opposite to the display region and may be connected to the side wall. The side wall may include a left side wall  112 , a right side wall  114  opposite to the left side wall  112 , a top side wall  116 , and a bottom side wall  118  opposite to the top side wall  116 . The left side wall  112  and the right side wall  114  are disposed between the top side wall  116  and the bottom side wall  118 . The top side wall  116  and the bottom side wall  118  are disposed between the left side wall  112  and the right side wall  114 . The mounting groove  130  may be defined in the rear wall  111  and extend through the rear wall  111  along a thickness direction of the terminal device  100 , i.e. the mounting groove  130  may be a through hole defined in the rear wall  111 . The mounting groove  130  may be defined between the left side wall  112  and the right side wall  114 , and between the top side wall  116  and the bottom side wall  118 . Further, the terminal device  100  may include a middle board  140 , disposed between the display screen  120  and the rear wall  111 . The first elastic member  300  may be connected to the middle board  140 . The middle board  140  and the side wall may be formed integrally. Alternatively, the middle board  140  may be detachably connected to the side wall. Structural stability of the first elastic member  300  may be improved by configuring the middle board  140  to support the first elastic member  300 . 
     As shown in  FIG. 7  and  FIG. 8 , a side of the rear wall  111  opposite to the display region may define a groove  150  extending through the rear wall  111  along the thickness direction of the terminal device  100 . The lock tongue  400  may include a body portion  410  and a slide block  420  connected to the body portion  410 . The slide block  420  may be received in and extend through the groove  150 . The body portion  410  may switch between the first position and the second position by slidable engagement between the slide block  420  and the groove  150 . Further, the groove  150  may include a slide groove  151  and a reservation groove  153  communicating with the slide groove  151 . The slide block  420  may include a limiting portion  421  and a connection portion  423 . In some embodiments, the limiting portion  421  and the connection portion  423  may be connected to each other, whereas in some embodiments, the limiting portion  421  and the connection portion  423  may be integrally formed as an overall structure. The connection portion  423  may be received in and extend through the reservation groove  153 , and may be connected to the body portion  410 . Connection between the connection portion  423  and the body portion  410  may include, but is not limited to, detachable connection and fixed connection. The limiting portion  421  may be slidably received in the slide groove  151  and may be exposed from the side of the rear wall  111  opposite to the display region. The user may slide the limiting portion  421  along the slide groove  151  to allow the body portion  410  to switch between the first position and the second position. 
     Further, in one implementation, a size of a cross section of the reservation groove  153  may be greater than that of the connection portion  423 , and the size of the cross section of the reservation groove  153  may be less than that of the limiting portion  421 . For example, in some embodiments, a distance between two opposite walls of the reservation groove  153  along a length direction of the terminal device  100  may be greater than a distance between an upper surface and a lower surface of the connection portion  423  along the length direction of the terminal device  100 , but less than a distance between an upper surface and a lower surface of the limiting portion  421  along the length direction of the terminal device  100 . In this way, the connection portion  423  and the body portion  410  may be engaged easily, and a position that the limiting portion  421  may slide to reach may be limited by the walls of the reservation groove  153 , preventing a tilted limiting portion  421  from being received in the reservation groove  153 , such that reliability of movement of the lock tongue  400  may be improved. 
     As shown in  FIG. 8 , in one embodiment, the mobile terminal  10  may include a second elastic member  160 . One end of the second elastic member  160  may abut against the body portion  410 , and the other end of the second elastic member  160  may abut against the terminal device  100 . The second elastic member  160  may push the body portion  410  from the second position to the first position, such that the body portion  410  may be received in the mounting groove  130 . In one embodiment, the second elastic member  160  may be a spring, and may allow the lock tongue  400  to be reset easily, such that the lock tongue  400  may protrude from the wall of the mounting groove  130  to be at least partially received in the mounting groove, and may securely lock the image capturing device  200  while being in the first position. In other embodiments, the second elastic member  160  may be an elastic post, an elastic sheet, and the like. It should be understood that, the first elastic member  30  may be a spring, an elastic post, an elastic sheet, and the like, which will not be illustrated in more detail herein. It should be understood that, the second elastic member  160  may be omitted. The image capturing device  200  may be securely received in the mounting groove  130  by configuring the lock tongue  400  to slide relative to the rear wall  111  to be received into the slot  211  of the image capturing device  200 . 
     As shown in  FIG. 7  and  FIG. 8 , the terminal device  100  may have a first groove wall  141  and the second groove wall  143  opposite to first groove wall  141 . For example, in one embodiment, the first and the second groove walls may be the walls of the mounting groove  130 . One end of the first groove wall  141  may be connected to the middle board  140 , and another end of the first groove wall  141  may be connected to the rear wall  111 . One end of the second groove wall  143  may be connected to the middle board  140 , and another end of the second groove wall  143  may be connected to the rear wall  111 . The second groove wall  143  may be inclined towards a side at which the bottom side wall  118  is arranged to form a draft angle, i.e. a distance between the another end of the second groove wall  143  and the bottom side wall  118  may be less than a distance between the one end of the second groove wall  143  and the bottom side wall  118 . When the lock tongue  400  moves to reach the second position to unlock the image capturing device  200  with the terminal device  100 , the draft angle may allow the image capturing device  200  to be ejected from the mounting groove  130  easily, such that the user may take the image capturing device  200  out of the mounting groove  130  easily. 
     Compared to the second groove wall  143 , the first groove wall  141  may be closer to the top side wall  116 . In the first position, the body portion  410  may protrude from the second groove wall  143 . Further, as shown in  FIG. 11 , a protrusion  145  may be arranged on the first groove wall  141 . The protrusion  145  may protrude from the first groove wall  141 , extending towards the mounting groove  130 . The cover  210  may define a positioning recess  213  corresponding to the protrusion  145 . After the image capturing device  200  received in the mounting groove  130 , the protrusion  145  may be received in the positioning recess  213  and fastened with a wall of the positioning recess  213 . Fastening the protrusion  145  with the wall of the positioning recess  213  may allow the image capturing device  200  to be positioned inside the mounting groove  130  easily, and allow the user to mount the image capturing device  200  into the mounting groove  130  securely, preventing the image capturing device  200  from being detached from the mounting groove  130  easily. 
     Further, as shown in  FIG. 5  and  FIG. 6 , the image capturing device  200  may substantially be a rectangular cube. The cover  210  may include a front end face  215 , a rear end face  217  opposite to the front end face  215 , and a side end face connected to the front end face  215  and the rear end face  217 . The side end face may include a left end face  212 , a right end face  214  opposite to the left end face  212 , a top end face  216 , and a bottom end face  218  opposite to the top end face  216 . The left end face  212  and the right end face  214  may be disposed between the top end face  216  and the bottom end face  218 . The top end face  216  and the bottom end face  218  may be disposed between the left end face  212  and the right end face  214 . The light incidence face  221  may be exposed from the front end face  215 . The slot  211  may be defined in a side at which the bottom end face  218  is disposed. In the embodiment where the image capturing device  200  defines the positioning recess  213 , the positioning recess  213  may be defined in the side at which the top end face  216  is disposed. When the image capturing device  200  is received in the mounting groove  130 , the front end face  215  may flush with an outer surface of the rear wall  111 . After the image capturing device  200  having the above-mentioned structure is received in the mounting groove  130 , an appearance of the mobile terminal  10  may be highly maintained as an integral. In one embodiment, the light incidence face  221  may protrude form the front end face  215 . In this way, a position of the image capturing device  200  at which the light incidence face  221  is disposed may be relatively thick, and other positions of the image capturing device  200  may be relatively thin. In this way, the image capturing device  200  may be light and thin, and the mobile terminal  10  may be light and thin. 
     In one embodiment, the image capturing device  200  may include a module contact  2131 , and the terminal device  100  may include a device contact  1451 . When the image capturing device is received in the mounting groove  130 , the module contact  2131  may be in contact with and connected to the device contact  1451 , such that the terminal device  100  may charge the image capturing device  200 . In this way, the terminal device  100  may easily charge the image capturing device  200 , and the image capturing device  200  may remain sufficient power to be used by the user easily. It should be understood that each of the module contact  2131  or the device contact  1451  may be a metal contact, and may have various structural forms. For example, the image capturing device  200  may define a hole, and the metal contact may be received in the hole, serving as the module contact  2131 . The terminal device  100  may be arranged with a protruded metal contact, serving as the device contact  1451 . The terminal device  100  charging the image capturing device  200  may be achieved by engaging the module contact  2131  with the device contact  1451 . Further, in one implementation, the protrusion  145  may have the metal contact structure, serving as the device contact  1451 , and the metal contact may be received in the positioning recess  213  to serve as the module contact  2131 . 
     As shown in  FIG. 5  and  FIG. 6 , the image capturing device  200  may include a module main board  240  in the cover  210 . The second power module  230  may be stacked on the module main board  240  and supply power for the module main board  240 . The module main board  240  may be communicatively connected to the camera module  220  and the second wireless communication module  250 . The module main board  240  may include a circuit board and a plurality of electronic elements connected to the circuit board. The module main board  240  may process image information collected by the camera module  220 , and send the image information to the terminal device  100  via the second wireless communication module  250 . The module main board  240  may define a first through hole  241  to allow the module main board  240  to be substantially ring-shaped. The camera module  220  may include a lens tube  223 , the light incidence face  221  may be exposed at an end of the lens tube  223 , and the lens tube  223  may be received in and extend through the first through hole  241 . In this way, the lens tube  223  may not stack above the module main board  240 , and therefore, internal elements of the image capturing device  200  may be arranged compactly, and an overall thickness of the image capturing device  200  may be reduced. 
     Further, the second power module  230  may define a second through hole  231  to allow the second power module  230  to be substantially ring-shaped. The second through hole  231  may communicate with the first through hole  241 . The lens tube  223  may extend through the first through hole  241  and the second through hole  231 . In this way, the lens tube  223  may not stack above the second power module  230 . Therefore, the internal elements of the image capturing device  200  may be arranged compactly, and the overall thickness of the image capturing device  200  may be reduced. It should be understood that each of the first power module  170  and the second power module  230  may include a battery able to repeatedly charge and discharge, such as a lithium battery. In other embodiments, each of the first power module  170  and the second power module  230  may be a fuel battery or other types of batteries. The second power module  230  may be connected to the module main board  240  through a power flexible printed circuit board (FPC), such that the second power module  230  may supply power for the module main board  240 , which will not be described in detail herein. 
     Various technical features of the above-mentioned embodiments may be combined arbitrarily. In order to provide a concise description, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, all the combinations should be included in the scope of the present disclosure. 
     The above-mentioned embodiments only show several implementations of the present disclosure, and the several implementations are described in specific details, but it should not be understood as a limitation of the scope of the present disclosure. It should be noted that for those ordinary skilled in the art, without departing from the concept of the present disclosure, various modifications and improvements may be made and should fall within the scope of the present disclosure. Therefore, the scope of the present disclosure shall be subject to the appended claims.