Abstract:
A portable terminal has a main machine body and a cell, one of the main machine body and the cell is arranged a pushing button moving axially, and a compression spring is arranged between the pushing button and the one of the main machine body and the cell, the other has a clamp slot of which a notch extends axially, and the main machine body and the cell is clamped at the axial direction by the pushing button and the clamp slot. The portable terminal also comprises a lock cover connected with the pushing button, and a torsional spring is arranged between the lock cover and the pushing button, so that the lock cover and the pushing button can rotate along the spring-body axis of the torsional spring; when the torsional spring is reset, vertical distance between one end of the lock cover and the cell or the body arranged the compression spring is smaller than the distance that the pushing button inserts into the clamp slot. The lock cover in the present invention can achieve double-clamping at the axial direction for the cell and the main machine body. The pushing button can tightly lock the cell and the main machine body even if the portable terminal is dropped down or impacted. The cell can be taken from the main machine body only by adding certain torque to the torsional spring while in the assembling or disassembling operation, operation is simple and convenient.

Description:
FIELD OF THE INVENTION 
     The present application relates to the technical field of electronic products, and particularly to a portable terminal. 
     BACKGROUND OF THE INVENTION 
     With the rapid development of electronic technology, the application of a portable terminal apparatus has become increasingly wider, for example, in walkie-talkies, mobile phones and other electronic products. 
     As shown in  FIGS. 1, 2 and 3 ,  FIG. 1  is a schematic structural view of a typical portable terminal;  FIG. 2  is a schematic partial enlarged view of part A in  FIG. 1 ; and  FIG. 3  is a schematic partial enlarged view of part B in  FIG. 1 . 
     The portable terminal generally includes two parts: a main machine  11  and a battery  12 . Since in use, the battery  12  needs to be detached from the main machine  11  frequently so as to be charged, repaired or replaced, the battery  12  and the main machine  11  are movably connected. Each of the outer side of the top end and the inner side of the tail end of the main machine  11  as shown in  FIG. 1  has an engaging groove  111  open to a respective side face, and the main machine  11  has an opening configured to receive the bottom portion of the battery  12 . When being mounted, the battery  12  is pushed forwards along an axial direction of the opening from the tail end of the main machine  11 , so that the top end of the battery  12  abuts against the top end of the main machine  11 . Also, each of both sides of the top end of the battery  12  has a sliding catch (not shown in  FIG. 1 ) engaged with the respective engaging groove  111  at the top end of the main machine  11 , and the tail end of the battery  12  also has a sliding catch  121  engaged with the respective engaging groove  111  at the tail end of the main machine  11 . Then, after the sliding catch engages with the engaging groove  111 , the battery  12  cannot move leftwards and rightwards or upwards and downwards relative to the main machine  11 ; however, the battery  12  may still exit along the axial direction of the opening from the main machine  11 . Thus, a pushing button  13  is further provided. The tail end of the main machine  11  as shown in  FIG. 1  has a groove opened upwards, with the pushing button  13  being placed in the groove. The upper portion of the pushing button  13  has a protrusion, and a spring is provided between the pushing button  13  and the bottom portion of the groove. When the spring is not pressed, the protrusion of the pushing button  13  is located above the opening of the groove. The tail end of the battery  12  is provided with a groove opened downwards at the position corresponding to the protrusion. In mounting, the pushing button  13  is pushed downwards, so that the spring is compressed and the protrusion enters within the groove, without limitation to sliding of the battery  12 ; and after the battery  12  slides into the opening of the main machine  11 , the pushing button  13  is released, and is ejected upwards under the elastic force of the spring, so that the protrusion of the pushing button  13  is inserted into the groove of the battery  12 , thereby preventing the battery  12  from exiting axially. 
     However, in the prior art, the pushing button  13  and a spring are primarily adopted for preventing the battery  12  from exiting. Due to the elasticity of the spring, the battery  12  is likely to be loosened, resulting in a poor contact of the electrodes of the battery  12 . Moreover, when the portable terminal falls off or is stricken, the spring would be compressed under the gravity of the pushing button  13  or the inertia, and as a result, the pushing button  13  fails so that the battery  12  may exit. Furthermore, in the prior art, only a small segment of sliding catch  121  is adopted, resulting in insufficient stability. 
     Thus, it is a technical problem to be addressed by the person skilled in the art to provide a portable terminal in which the battery and the main machine may be fixed firmly and assembled and disassembled easily. 
     SUMMARY OF THE INVENTION 
     An object of the present application is to provide a portable terminal in which the battery and the main machine body may be fixed firmly so that the battery will not drop off even when the portable terminal encounters situations such as falling off or being stricken, and may be assembled and disassembled easily. 
     For addressing the above technical problems, the present application provides a portable terminal including a main machine body and a battery. The main machine body has an opening portion for receiving the bottom portion of the battery. The main machine body is engaged with the battery in a transverse direction and a longitudinal direction. One of the main machine body and the battery is provided with a pushing button moveable in the longitudinal direction, with a compression spring ( 27 ) being provided therebetween. The other one of the main machine body and the battery is provided with an engaging groove extending in the longitudinal direction. The main machine body and the battery are engaged in an axial direction via the pushing button and the engaging groove. The portable terminal further includes a locking cover connected to the pushing button. A torsion spring is provided between the locking cover and the pushing button, such that the locking cover and the pushing button rotate about the axis of the spring body of the torsion spring. When the torsion spring is returned, the longitudinal distance between one end of the locking cover and the battery or the main machine body provided with the compression spring is less than the distance by which the pushing button is inserted into the engaging groove. 
     Preferably, the pushing button has an axial protrusion, and the locking cover is hinged with the protrusion by a rotating shaft. The rotating shaft extends transversely through the protrusion, and the spring body of the torsion spring extends throughout the rotating shaft. 
     Preferably, the locking cover has two clamping arms located at both sides of the protrusion respectively, and the rotating shaft extends through the two clamping arms and the protrusion. The torsion spring is a double torsion spring, and two spring arms located at a side of the double torsion spring are connected to the two clamping arms respectively. 
     Preferably, each of the both sides of the main machine body has a sliding groove extending axially and opened outwards, and each of the both sides of the battery has a rib engaged in the corresponding sliding groove and sliding in an axial direction of the sliding groove. 
     Preferably, the sliding grooves are located outside of the both sides of the main machine body, and the ribs are located inside of the both sides of the battery. 
     Preferably, the battery includes a cell body and a shell for loading the cell body. The shell includes a battery top shell and a battery bottom shell. The battery bottom shell is located in the opening portion, and the rib is located at each of side edges of the battery top shell, and one end of the locking cover abuts against the top portion of the tail end of the battery top shell. 
     When the portable terminal according to the present application is mounted, a torque may be applied to the torsion spring, so that a force may be applied to one end of the locking cover, and the locking cover may be turned relative to the pushing button. Thus, the longitudinal distance between one end of the locking cover and the battery or the main machine body does not limit the longitudinal movement of the pushing button anymore, and then the pushing button is pushed to compress the compression spring, so that the bottom portion of the battery is allowed to abut against the bottom portion of the main machine body. After the bottom portion of the battery abuts against the bottom portion of the main machine body, the pushing button and the locking cover are released. As a result, on the one hand, the pushing button stretches out under the elastic force of the compression spring to be engaged with the engaging groove of the main machine body or the battery; and on the other hand, the locking cover returns to be in the initial state under the returning action of the torsion spring. Thus, the pushing button cannot exit from the engaging groove and is in the deadlocked state, thereby achieving double axial engagement between the battery and the main machine body. Even when the portable apparatus falls off or is stricken, the pushing button will not exit entirely from the engaging groove, that is, the pushing button may still lock the battery and the main machine body reliably. In disassembling, similarly, the locking cover is returned, and the pushing button is pushed to compress the compression spring, so that the pushing button is disengaged from the engaging groove of the main machine body or the battery. Consequently, the battery may exit from the opening portion of the main machine body. 
     In a specific embodiment, the outer portion of the pushing button may have an axial protrusion. The locking cover is connected to the protrusion via a torsion spring. A transverse rotating shaft is provided on the protrusion, and the locking cover is hinged with the protrusion via the transverse rotating shaft. Since the protrusion extends by a certain distance in the axial direction, the locking cover is facilitated to be turned about the axis of the spring body of the torsion spring without being limited by other structures. Besides, since the locking cover is hinged with the protrusion via the transverse rotating shaft, the connection of the double torsion spring may be simplified. 
     In another specific embodiment, the main machine body has a sliding groove located at each of its both outer sides, with the sliding groove being opened outwards, and correspondingly, a rib is provided inside of each of the both sides of the shell of the battery. In mounting, the top end of the battery slides gradually into the opening portion from the tail end of the main machine body, till the top end of the battery and the top end of the main machine body abut against each other. Here, two sides of the battery and two sides of the main machine body are respectively engaged along the whole axial length of the sliding grooves, so that the main machine body and the battery may be fixed firmly in a transverse direction and a longitudinal direction. Furthermore, the engaging groove is located at an outer side of the main machine body, which may prevent the outside dust, moisture or other foreign matters from entering the space between the battery and main machine body, so as to ensure the service performance of the portable terminal apparatus. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic structural view of a typical portable terminal; 
         FIG. 2  is a schematic partial enlarged view of part A in  FIG. 1 ; 
         FIG. 3  is a schematic partial enlarged view of part B in  FIG. 1 ; 
         FIG. 4  is a schematic exploded structural view of an assembly of a specific embodiment of a portable terminal according to the present application; 
         FIG. 5  is a schematic cross-sectional view of the portable terminal shown in  FIG. 4 ; 
         FIG. 6  is a right view showing the tail end of the portable terminal shown in  FIG. 4 ; 
         FIG. 7  is a schematic view showing the principle of the structure in  FIG. 6 ; 
         FIG. 8  is a schematic structural view of the portable terminal shown in  FIG. 4 ; 
         FIG. 9  is a schematic structural view showing the pushing button fitted with the locking cover in another specific embodiment of the portable terminal according to the present application; 
         FIG. 10  is a schematic view showing the battery fitted with the main machine body in still another specific embodiment of the portable terminal according to the present application; and 
         FIG. 11  is a schematic view taken along line C of  FIG. 10 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     An object of the present application is to provide a portable terminal in which the battery and the main machine body may be fixed firmly so that the battery will not drop off even when the portable terminal encounters situations such as falling off or being stricken, and may be assembled and disassembled easily. 
     For those skilled in the art to understand better the technical solutions of the present application, the present application will be further described below in detail in conjunction with the accompanying drawings and the specific embodiments. 
     Referring to  FIGS. 4 to 8 ,  FIG. 4  is a schematic exploded structural view of an assembly of a specific embodiment of a portable terminal according to the present application;  FIG. 5  is a schematic cross-sectional view of the portable terminal shown in  FIG. 4 ;  FIG. 6  is a right view showing the tail end of the portable terminal shown in  FIG. 4 ;  FIG. 7  is a schematic view showing the principle of the structure in  FIG. 6 ; and  FIG. 8  is a schematic structural view of the portable terminal shown in  FIG. 4 . 
     A portable terminal according to the present application includes a main machine body  21  and a battery  22 . The main machine body  21  has an opening portion for receiving the bottom portion of the battery  22 . In the portable terminal shown in  FIG. 8 , only the bottom portion of the battery  22  is located in the opening portion. The main machine body  21  is engaged with the battery  22  in a transverse direction and a longitudinal direction. The transverse direction is a direction perpendicular to an axial direction of the opening portion in the opening plane of the opening portion, and the longitudinal direction is a direction perpendicular to the opening plane of the opening portion. In the case of respective of  FIG. 4 , the longitudinal direction is a vertical direction of the portable terminal. For example, an engaging groove open to a respective side face may be machined at each of both sides of the top end and of the tail end of the main machine body  21 , and a structure adapted to be inserted into the respective engaging groove may be machined at each of both sides of the top end and of the tail end of the battery  22 , so that the battery  22  may be pushed into the opening portion from a rear end of the main machine body  21  and cannot move leftwards and rightwards (transversely), upwards and downwards (longitudinally) relative to the main machine body  21 . After the battery  22  is placed into the opening portion, the top end of the battery  22  abuts against the top end of the main machine body  21 , so that the battery  22  may exit from the tail end of the main machine body  21  only along the opening portion. The main machine body  21  may be provided with a pushing button  24  moving in the longitudinal direction, and a compression spring  27  is provided between the main machine body  21  and the pushing button  24 . The battery  22  may be provided with an engaging groove extending in the longitudinal direction, so that the main machine body  21  is engaged with the battery  22  in the axial direction via the pushing button  24  and the engaging groove. Of course, as shown in  FIGS. 5 and 6 , the tail end of the battery  21  may have a pushing button  24  moving in the longitudinal direction, and a compression spring  27  may be provided between the battery  21  and the pushing button  24 . The lower end of the pushing button  24  may be inserted into the engaging groove of the main machine body  21 , so that the battery  22  is incapable of exiting in the axial direction of the opening portion due to the limitation of the pushing button  24 . When the battery  22  is disassembled, the pushing button  24  is pushed upwards, and the compression spring  27  is compressed, so that the lower end of the pushing button  24  is disengaged from the engaging groove of the main machine body  21 , thereby allowing the axial movement of the battery  22  without the limitation of the pushing button  24 . In this way, the battery  22  may exit from the opening portion. In mounting, the pushing button  24  is pushed upwards until the battery  22  is mounted in the opening portion, and then is released, so that the pushing button  24  moves downwards due to the returning action of the compression spring  27  and then the lower portion of the pushing button  24  is engaged in the engaging groove of the tail end of the main machine body  21 , causing that the battery  22  is incapable of exiting. 
     The portable terminal further includes a locking cover  25 , with a torsion spring  23  being provided between the locking cover  25  and the pushing button  24 . Preferably, the torsion spring  23  is provided between the outer side of the pushing button  24  and the locking cover  25 . The outer side of the pushing button  24  is the portion of the pushing button  24  facing outwards after the pushing button  24  is assembled. When a torque is applied to the torsion spring  23 , the pushing button  24  may rotate about the axis of the spring body of the torsion spring  23  relative to the locking cover  25 ; and when the torsion spring  23  is in a return state without being applied with the torque, the longitudinal distance between one end of the locking cover  25  and the battery  22  or the main machine body  21  provided with the compression spring  27  is less than the distance by which the pushing button  24  is inserted into the engaging groove. As shown in  FIG. 7 , the compression spring  27  is arranged at the tail end of the battery  22 , and the upper end of the locking cover  25  abuts against the tail end of the battery  22  when the torsion spring  23  is returned, so that the pushing button  24  connected with the locking cover  25  cannot move upwards. Also, the lower end of the pushing button  24  abuts against the bottom portion of the engaging groove of the main machine body  21 , so that the pushing button  24  cannot move downwards. Thus, the pushing button  24  is in a rigid deadlocked state. In fact, it is not necessary that the upper end of the locking cover  25  abuts against the tail end of the battery  22  when the torsion spring  23  is returned, so long as the longitudinal distance between the upper end of the locking cover  25  and the tail end of the battery  22  is less than the distance by which the pushing button  24  is inserted into the engaging groove of the main machine body  21 , that is, the pushing button  24  may move upwards by a small distance, but cannot exit from the engaging groove of the main machine body  21 . 
     In mounting, a torque may be applied to the torsion spring  23 , so that a force may be applied to one end of the locking cover  25 , and the locking cover  25  may be turned relative to the pushing button  24 . Thus, the longitudinal distance between one end of the locking cover  25  and the battery  22  or the main machine body  21  does not limit the longitudinal movement of the pushing button  24  anymore, and then the pushing button  24  is pushed to compress the compression spring  27 , so that the bottom portion of the battery  22  is allowed to abut against the bottom portion of the main machine body  21 . After the bottom portion of the battery  22  abuts against the bottom portion of the main machine body  21 , the pushing button  24  and the locking cover  25  are released. As a result, on the one hand, the pushing button  24  stretches out under the elastic force of the compression spring  27  to be engaged with the engaging groove of the main machine body  21  or the battery  22 ; and on the other hand, the locking cover  25  returns to be in the initial state under the returning action of the torsion spring  23 . The locking cover  25  as shown in  FIG. 7  abuts against the tail end of the battery  22  again, so that the pushing button  24  cannot move and is in the deadlocked state, thereby achieving double axial engagement between the battery  22  and the main machine body  21 . Even when the portable apparatus falls off or is stricken, the pushing button  24  will not exit entirely from the engaging groove, that is, the pushing button  24  may still lock the battery  22  and the main machine body  21  reliably. In disassembling, similarly, the locking cover  25  is returned, and the pushing button  24  is pushed to compress the compression spring  27 , so that the pushing button  24  is disengaged from the engaging groove of the main machine body  21  or the battery  22 . Consequently, the battery  22  may exit from the opening portion of the main machine body  21 . 
     Referring to  FIG. 9 ,  FIG. 9  is a schematic structural view showing the pushing button fitted with the locking cover in another specific embodiment of the portable terminal according to the present application. 
     The outer side of the pushing button  24  may be provided with an axial protrusion  241 , and the locking cover  25  is connected to the protrusion  241  via a torsion spring  23 . Since the protrusion  241  extends by a certain distance in the axial direction, the locking cover  25  is facilitated to be turned about the axis of the spring body of the torsion spring  23  without being limited by other structures. A transverse rotating shaft  26  may further be arranged on the protrusion  241 , and the locking cover  25  is hinged with the protrusion  241  by the transverse rotating shaft  26 . The double torsion spring  23  may result in simpler connection. 
     As shown in  FIG. 9 , the locking cover  25  may have two clamping arms located at both sides of the protrusion  241  respectively, and the rotating shaft  26  passes through the two clamping arms and the protrusion  241 . The torsion spring  23  is a double torsion spring. Two spring arms located at a side of the double torsion spring abut against the two clamping arms respectively, and the spring arms on the other side of the double torsion spring are connected to the pushing button  24 . As shown in  FIG. 4 , two axial through holes arranged transversely in parallel may be machined at the middle portion of the pushing button  24 , and then the transverse spring arms of the double torsion spring  23  may be located at the inner side of the pushing button  24 , and the two spring arms opposing to the transverse spring arms are located at the outer side of the pushing button  24  so as to abut against the two clamping arms of the locking cover  25  located at the outer side of the pushing button  24 . Furthermore, the axial through hole facilitates turning the locking cover  25 , for example, the locking cover  25  is rotated anticlockwise by 90°. The two spring arms of the locking cover  25  (in the present embodiment, the two spring arms abut against the tail end of the battery  22 ) may be rotated into the axial through holes of the pushing button  24 , and then the locking cover  25  may be pushed upwards, so as to drive the pushing button  24  to compress the compression spring  27  and thus to be disengaged from the engaging groove of the tail end of the main machine body  21 . Here, the battery  22  may exit in the axial direction of the opening portion. In mounting, similarly, the locking cover  25  is rotated anticlockwise by 90° and then pushed upwards; and after the battery  22  is mounted into the opening portion, the locking cover  25  is released, so that the pushing button  24  is engaged in the engaging groove. Of course, it is not necessary to rotate the locking cover  25  by 90°. That is, the locking cover  25  may be rotated by any angle, so long as the angle of the rotation enables the locking cover  25  not to abut against the battery  22  or the main machine body  21  and enables the pushing button  24  to be retracted. In the present embodiment, the locking cover  25  may rotate to a large extent, and may also act as a component for urging the pushing button  24 , so that the double deadlocked process and the unlocking process may be performed continuously, resulting in easier operation. Furthermore, such a structure may be easily machined without influencing the appearance of the portable terminal. 
     Each of the both sides of the main machine body  21  may have a sliding groove  211  extending axially and opened outwards, and each of the both sides of the battery  22  may have a rib  2211  mated with the corresponding sliding groove  211 , so that the rib  2211  may be engaged in the corresponding sliding groove  211  and may slide in the axial direction of the sliding groove  211 . When the battery  22  is mounted, the top end of the battery  22  slides gradually into the opening portion from the tail end of the main machine body  21 , till the top end of the battery  22  and the top end of the main machine body  21  abut against each other. Here, both sides of the battery  22  and both sides of the main machine body  21  are respectively engaged along the whole axial length of the sliding grooves  211 , so that the main machine body  21  and the battery  22  may be fixed firmly in the transverse direction and the longitudinal direction. 
     Referring to  FIGS. 10 and 11 ,  FIG. 10  is a schematic view showing the battery fitted with the main machine body in still another specific embodiment of the portable terminal according to the present application; and  FIG. 11  is a schematic view taken along line C of  FIG. 10 . 
     The sliding groove  211  may be located outside of the respective sides of the main machine body  21 , and may be opened outwards. Correspondingly, the rib  2211  may be located inside of the respective sides of a shell of the battery  22 . Thus, after being assembled, the upper portion of the battery  22  engagingly covers the main machine body  21 . Such a structure may prevent the outside dust, moisture or other foreign matters from entering the space between the battery  22  and the main machine body  21 , so as to ensure the service performance of the portable terminal apparatus. Alternatively, a sliding groove  211  opened inwards may be provided inside of each of the both sides of the main machine body  21 , and correspondingly, the rib  2211  may be located at outside of each of the both sides of the battery  22 , thereby also achieving the object of the present application. 
     The battery  22  may include a cell body and a shell for loading the cell body. The cell body may be referred as a power supply. The shell may include a battery top shell  221  and a battery bottom shell  222 . As shown in  FIG. 4 . In assembling, the battery bottom shell  222  and the battery top shell  221  are engaged and connected together to form an integrated piece, and then slide into the opening portion of the main machine body  21  along the sliding groove  211 . After being assembled, the battery bottom shell  222  is located in the opening portion, and the rib  2211  is located at each of side edges of the battery top shell  221 , and one end of the locking cover  25  abuts against the tail end of the battery top shell  221 . 
     The portable terminal according to the present application has been described above in detail. In the description, the specific examples are used to elaborate the principle and implementations of the present application. It is noted that the above description of the embodiments is provided only for the purpose of better understanding the method and spirit of the present application. It should be noted that, many improvements and modifications can be made by those skilled in the art without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the application defined by the claims.