Patent Publication Number: US-11643841-B2

Title: Push-and-pull latch device

Description:
FIELD OF THE INVENTION 
     The present disclosure relates to a latch device, and more particularly to a push-and-pull latch device applied to a door lock or a drawer lock. 
     BACKGROUND OF THE INVENTION 
     Doors, windows, or furniture in human life often have a set of components which need to be opened or closed with each other. In addition to maintaining the function of opening and closing, the components also need to be locked by a latch device. 
     The design of the conventional latch device is limited due to the operation direction or the connection with the handle. A sufficient operating space must be provided for the operation of the latch device. For a latching device utilized in a limited space, such as a door lock or a drawer lock disposed on a transportation vehicle, if the operating space of the latch device is larger, it cannot meet the practical requirements. 
     On the other hand, the latch device is applied to an object not only for opening and closing operations thereof, but also providing a locking function. The conventional latch device uses a simple tongue-and-slot component to achieve positioning and locking functions. In order to achieve the positioning and locking function at different positions, the conventional latch device often includes a plurality of elastic tongue-and-slot components. Hence, the overall structure of the conventional latch device is complex, and it is difficult to assemble and maintain. 
     Therefore, it is necessary to provide a push-and-pull latch device applied to a door lock or a drawer lock, to achieve the overall structure to be assembled and maintained easily, and be operated in a limited operating space to solve the foregoing problems and overcome the above drawbacks. 
     SUMMARY OF THE INVENTION 
     An object of the present disclosure is to provide a push-and-pull latch device applied to a door lock or a drawer lock. With operations of an inner-shaft component and an inner-sleeve assembly, engaging portions of related components are driven to space apart or engage. In that, the latch device is driven by a simple pressing action in a limited operating space and it is conducive to achieving the functions of opening, closing or locking a door or a drawer. The overall structure is compact. It is easy to assemble, maintain and operate. 
     Another object of the present disclosure is to provide a push-and-pull latch device applied to a door lock or a drawer lock. The latch device has a compacted structure, and can be assembled easily. By driving the inner-shaft component and the elastic components to move relative to a guiding groove of the inner-sleeve assembly or the housing, the relative positions of the related components are switched. The operation component of the latch device can be hidden or held, and the user can drive the engaging portions of the related components in the latch device to space apart or engage by a simple pressing action. It is conducive to achieving the functions of opening, closing or locking a door or a drawer. 
     A further object of the present disclosure is to provide a push-and-pull latch device applied to a door lock or a drawer lock. Positioning of the inner-shaft component and the inner-sleeve assembly is further implemented by the movement of the elastic component relative to the guiding groove of the inner-sleeve assembly or the housing, to replace the conventional elastic tenon assembly. The complexity and difficulty of assembly are simplified effectively. The guiding groove includes a plurality of inclined surfaces segmented to form a non-reverse sawtooth structure. It is beneficial for one end of the elastic component to constantly abut the guiding groove, and to move steadily along the guiding groove to be positioned at a specific position. In that, the engaging portions of the related components are driven to space apart or engage, to achieve the operations of opening, closing or locking. Compared with the conventional tenon structure, the combination of the elastic component and the guiding groove is easier to assemble, replace or maintain. It enhances the competitiveness of the push-and-pull latch device effectively. 
     According to an aspect of the present disclosure, there is a push-and-pull latch device for being disposed on an object. The object includes a movable component and a fixed component. The movable component includes an installation opening. The push-and-pull latch device includes a housing, a latching component, two first elastic components, an inner-sleeve assembly, an inner-shaft component, a second elastic component and a third elastic component. The housing is fixed to the movable component. The housing includes an accommodation seat and a lateral opening. The lateral opening is in communication with the accommodation seat. The latching component includes a latching portion, two arms and two first engaging portions. The two arms spatially correspond to each other, the latching portion is connected to the two arms, the two first engaging portions are disposed on two corresponding sides of the two arms, and the latching portion spatially corresponds to the lateral opening. The two first elastic components spatially correspond to the two arms and are disposed between the housing and the corresponding one of the two arms. The first elastic component is constantly abutted between the corresponding one of the two arms and the housing, so that when the latching portion is passed through the lateral opening and engaged with the fixed component, the movable component is blocked from moving relative to the fixed component. The inner-sleeve assembly is detachably accommodated within the accommodation seat and located between the two corresponding sides of the two arms. The inner-sleeve assembly includes an accommodation space, a bottom portion, a first opening, two limiting portions, at least one second engaging portion and a guiding groove. The two limiting portions spatially correspond to the two first engaging portions. The first opening spatially corresponds to the bottom portion and is communication with the accommodation space. The guiding groove faces to the accommodation space. The at least one second engaging portion is disposed adjacent to the first opening, and the guiding groove includes a first fastening recess and a second fastening recess. The inner-shaft component spatially corresponds to the installation opening. The inner-shaft component is partially accommodated within the accommodation space of the inner-sleeve assembly, and includes a fixing space and at least one third engaging portion. The at least one third engaging portion is disposed on a bottom end of the inner-shaft component and spatially corresponds to the at least one second engaging portion. The second elastic component includes a first end connected to the bottom portion of the inner-sleeve assembly and a second end accommodated within the fixing space of the inner-shaft component. The second elastic component is constantly abutted between the inner-shaft component and the inner-sleeve assembly, so that the at least one third engaging portion is engaged with the at least one second engaging portion. The third elastic component includes a fixed portion and an engaging end. The fixed portion is accommodated within the fixing space. The engaging end constantly abuts the guide groove. When the second elastic component is constantly abutted between the inner-shaft component and the inner-sleeve assembly, the at least one third engaging portion is engaged with the at least one second engaging portion, and the engaging end is located at the first fastening recess. When the inner-shaft component is driven to abut the second elastic component and move the engaging end to the second fastening recess of the guiding groove, the at least one third engaging portion is separated from the at least one second engaging portion. 
     In an embodiment, when the inner-sleeve assembly is located at a first position relative to the accommodation seat, the two limiting portions and the two first engaging portions are engaged with each other, and the latching portion passes through the lateral opening and is engaged with the fixed component. When the inner-sleeve assembly is moved to a second position relative the accommodation seat, the two limiting portions drive the latching component to abut the two first elastic components through the two first engaging portions, and the latching portion is moved into the housing through the lateral opening, so that the latching portion and the fixed component are separated. 
     In an embodiment, the push-and-pull latch device further includes a stopper disposed on the fixed component and spatially corresponding to the latching portion of the latching component. When the latching component passes through the lateral opening, the latching component and the stopper are engaged with each other, so as to block the movable component from moving relative to the fixed component. 
     In an embodiment, the stopper further includes at least one first fastening component configured to fasten the stopper on the fixed component. 
     In an embodiment, the inner-shaft component includes an installation end and an operation component. The operation component is disposed on the installation end, spatially corresponds to the installation opening, and is exposed out of the movable component through the installation opening, so as to facilitate a user to push/pull the operation component. 
     In an embodiment, the push-and-pull latch device further includes an adjusting component having an accommodation opening and spatially corresponding to the installation opening. When the engaging end is moved to the second fastening recess of the guiding groove, the operation component is received within the accommodation opening. When the inner-shaft component drives the inner-sleeve assembly to move into the second position relative to the accommodation seat, the operation component is moved and exposed out of the accommodation opening. 
     In an embodiment, the housing further includes a cover having a second opening, and the inner-shaft component passes through the second opening. 
     In an embodiment, the housing further includes at least one second fastening component configured to fasten the housing on the movable component. 
     In an embodiment, the guiding groove includes a first channel and a second channel, the first channel is communicated between the first fastening recess and the second fastening recess, and the second channel is communicated between the second fastening recess and the first fastening recess. 
     In an embodiment, the first channel includes a plurality of inclined surfaces, and each of the inclined surfaces of the first channel increases in height along a direction from the first fastening recess to the second fastening recess. 
     In an embodiment, the second channel includes a plurality of inclined surfaces, and each of the inclined surfaces of the second channel increases in height along a direction from the second fastening recess to the first fastening recess. 
     In an embodiment, the two limiting portions include a triangular opening, respectively. 
     In an embodiment, when the latching portion of the latching component is subjected to a force and driven to push the two first elastic components, the latching portion is moved to pass through the lateral opening and received within the housing. 
     In an embodiment, the two first elastic components and the second elastic component includes a telescopic spring, respectively. 
     In an embodiment, the third elastic component includes a metal elastic component. 
     The above objects and advantages of the present disclosure become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed description and accompanying drawings, in which: 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view illustrating a push-and-pull latch device according to an embodiment of the present disclosure; 
         FIG.  2    is a perspective view illustrating the push-and-pull latch device according to the embodiment of the present disclosure and taken from another perspective; 
         FIG.  3    is an exploded view illustrating the push-and-pull latch device according to the embodiment of the present disclosure; 
         FIG.  4    is an exploded view illustrating the push-and-pull latch device according to the embodiment of the present disclosure and taken from another perspective; 
         FIG.  5    is a cross-sectional structure illustrating the push-and-pull latch device according to the embodiment of the present disclosure; 
         FIG.  6    is a lateral view illustrating the push-and-pull latch device when the inner-sleeve assembly is located at a first position relative to the accommodation seat and the engaging end of the third elastic component is located at a first fastening recess; 
         FIG.  7    is a cross-sectional view illustrating the push-and-pull latch device of  FIG.  6    and applied to an object; 
         FIG.  8    is a lateral view illustrating the push-and-pull latch device when the inner-sleeve assembly is located at the first position relative to the accommodation seat and the engaging end of the third elastic component is located at a second fastening recess; 
         FIG.  9    is a cross-sectional view illustrating the push-and-pull latch device of  FIG.  8    and applied to the object; 
         FIG.  10    is a lateral view illustrating the push-and-pull latch device when the inner-sleeve assembly is located at a second position relative to the accommodation seat and the engaging end of the third elastic component is located at the first fastening recess; 
         FIG.  11    is a cross-sectional view illustrating the push-and-pull latch device of  FIG.  10    and applied to the object; 
         FIG.  12    is a perspective view illustrating the inner-sleeve assembly of the push-and-pull latch device according to the embodiment of the present disclosure; 
         FIG.  13    shows the engaging end of the third elastic component is located at the first fastening recess of the guiding groove in the push-and-pull latch device; and 
         FIG.  14    shows the engaging end of the third elastic component is located at the second fastening recess of the guiding groove in the push-and-pull latch device. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The present disclosure will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this disclosure are presented herein for purpose of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed. 
       FIGS.  1  and  2    are perspective views illustrating a push-and-pull latch device according to an embodiment of the present disclosure.  FIGS.  3  and  4    are exploded views illustrating the push-and-pull latch device according to the embodiment of the present disclosure.  FIG.  5    is a cross-sectional structure illustrating the push-and-pull latch device according to the embodiment of the present disclosure.  FIG.  6    is a lateral view illustrating the push-and-pull latch device when the inner-sleeve assembly is located at a first position relative to the accommodation seat and the engaging end of the third elastic component is located at a first fastening recess.  FIG.  7    is a cross-sectional view illustrating the push-and-pull latch device of  FIG.  6    and applied to an object.  FIG.  8    is a lateral view illustrating the push-and-pull latch device when the inner-sleeve assembly is located at the first position relative to the accommodation seat and the engaging end of the third elastic component is located at a second fastening recess.  FIG.  9    is a cross-sectional view illustrating the push-and-pull latch device of  FIG.  8    and applied to the object.  FIG.  10    is a lateral view illustrating the push-and-pull latch device when the inner-sleeve assembly is located at a second position relative to the accommodation seat and the engaging end of the third elastic component is located at the first fastening recess.  FIG.  11    is a cross-sectional view illustrating the push-and-pull latch device of  FIG.  10    and applied to the object. In the embodiment, the push-and-pull latch device  1  is configured to be disposed on an object  9 , for example but not limited to a door or a drawer. The object  9  includes a movable component  91  and a fixed component  90 . Preferably but not exclusively, the push-and-pull latch device  1  is applied to a door lock. Preferably but not exclusively, the fixed component  90  is a door frame, and the movable member  91  is a door panel. In the embodiment, the movable component  91  includes an installation opening  92 . The push-and-pull latch device  1  spatially corresponds to the installation opening  92  and is fixed on the movable component  91 . 
     In the embodiment, the push-and-pull latch device  1  includes a housing  10 , a latching component  40 , two first elastic components  42   a ,  42   b , an inner-sleeve assembly  20 , an inner-shaft component  60 , a second elastic component  30  and a third elastic component  50 . The housing  10  is configured to be fixed to the movable component  91 , and spatially corresponds to the installation opening  92  of the movable component  91 . In the embodiment, the housing  10  includes an accommodation seat  11  and a lateral opening  12 . The lateral opening  12  is in communication with the accommodation seat  11 . Preferably but not exclusively, the housing  10  further includes a cover  70 . The cover  70  includes a second opening  71 . The second opening  71  spatially corresponds to the installation opening  92  and is disposed correspondingly. In the embodiment, the latching component  40  includes a latching portion  44 , two arms  41   a ,  41   b  and two first engaging portions  43   a ,  43   b . The two arms  41   a ,  41   b  spatially correspond to each other. Preferably but not exclusively, the two arms  41   a ,  41   b  are configured to form a symmetrical structure. Preferably but not exclusively, the latching portion  44  is a tongue structure, and connected to a connection end of two arms  41   a ,  41   b , so that the two arms  41   a ,  41   b  have two corresponding sides facing to each other. In the embodiment, the two first engaging portions  43   a ,  43   b  are disposed on the two corresponding sides of the two arms  41   a ,  41   b . In the embodiment, the latching portion  44  spatially corresponds to the lateral opening  12  of the housing  10 , and is configured to pass through the lateral opening  12  partially, so that the latching portion  44  is engaged with the fixed component  90 . Preferably but not exclusively, the two first elastic components  42   a ,  42   b  include a telescopic spring, respectively. In the embodiment, the two first elastic components  42   a ,  42   b  spatially correspond to the other ends of two arms  41   a ,  41   b  of the latching components  40  and are disposed between the housing  10  and the corresponding one of the two arms  41   a ,  41   b . The first elastic component  42   a ,  42   b  is constantly abutted between the corresponding one of the two arms  41   a ,  41   b  and the housing  10 , so that when the latching portion  44  of the latching component  40  is passed through the lateral opening  12  and engaged with the fixed component  90 , the movable component  91  is blocked from moving relative to the fixed component  90 . In that, it achieves the purpose of keeping the door or drawer closed. In the embodiment, the inner-sleeve assembly  20  is detachably accommodated within the accommodation seat  11  of the housing  10 , and located between the two corresponding sides of the two arms  41   a ,  41   b . Preferably but not exclusively, the inner-sleeve assembly  20  is selectively attached to or moved away from the accommodation seat  11  of the housing  10  in a vertical direction. In the embodiment, the inner-sleeve assembly  20  includes an accommodation space  23 , a bottom portion  25 , a first opening  24 , two limiting portions  21   a ,  21   b , at least one second engaging portion  26  and a guiding groove  22 . Preferably but not exclusively, the two limiting portions  21   a ,  21   b  include a triangular opening, respectively, which is in communication with the accommodation space  23 . The two limiting portions  21   a ,  21   b  spatially correspond to the two first engaging portions  43   a ,  43   b  of the latching component  40 . The first opening  24  spatially corresponds to the bottom portion  25  and is located at the top end of the inner-sleeve assembly  20 . The first opening  24  is in communication with the accommodation space  23 . Preferably but not exclusively, the guiding groove  22  is concavely formed on an inner lateral wall of the inner-sleeve assembly  20 . The guiding groove  22  faces to the accommodation space  23 . The at least one second engaging portion  26  is disposed adjacent to the first opening  24 . The guiding groove  22  includes a first fastening recess  22   a  and a second fastening recess  22   b . The inner-shaft component  60  spatially corresponds to the installation opening  92 . The inner-shaft component  60  is partially accommodated within the accommodation space  23  of the inner-sleeve assembly  20 , and includes a fixing space  62  and at least one third engaging portion  64 . The at least one third engaging portion  64  is disposed on a bottom end of the inner-shaft component  60  and spatially corresponds to the at least one second engaging portion  26  of the inner-sleeve assembly  20 . When the inner-shaft component  60  is at least partially accommodated within the accommodation space  23  of the inner-sleeve assembly  20 , the at least one third engaging portion  64  is located in the accommodation space  23  of the inner-sleeve assembly  20 . The at least one third engaging portion  64  and the at least one second engaging portions  26  of the inner-sleeve assembly  20  correspond to each other, and are configured to restrict the inner-shaft component  60 , so as to prevent the inner-shaft component  60  from being completely separated from the accommodation space  23  of the inner-sleeve assembly  20 . Preferably but not exclusively, the second elastic component  30  includes a telescopic spring. The second elastic component  30  includes a first end  31  connected to the bottom portion  25  of the inner-sleeve assembly  20  and a second end  32  accommodated within the fixing space  62  of the inner-shaft component  60 . The second elastic component  30  is constantly abutted between the inner-shaft component  60  and the inner-sleeve assembly  20 , so that the at least one third engaging portion  64  of the inner-shaft component  60  is engaged with the at least one second engaging portion  26  of the inner-sleeve assembly  20 . Preferably but not exclusively, the third elastic component  50  includes a metal elastic component. In the embodiment, the third elastic component  50  includes a fixed portion  52  and an engaging end  51 , which are disposed at two opposite ends of the third elastic component  50 . The fixed portion  52  is accommodated within the fixing space  62  of the inner-shaft component  60  and connected with the second end  32  of the second elastic component  30 , so that the third elastic component  50  is fixed on the inner-shaft component  60 , and the third elastic component  50  is moved with the inner-shaft component  60 . Notably, in the embodiment, when the fixed portion  52  of the third elastic member  50  is accommodated within the fixing space  62  of the inner-shaft component  60  and the third elastic component  50  is fixed on the inner-shaft component  60 , the engaging end  51  of the third elastic component  50  abuts the inner wall of the inner-sleeve  20  assembly due to the elasticity of third elastic component  50 . Preferably but not exclusively, the engaging end  51  is a bent section of a metal elastic component. Since the guiding groove  22  is concavely formed on the inner lateral wall of the inner-sleeve assembly  20 , when the third elastic component  50  is fixed on the inner-shaft component  60 , the engaging end  51  of the third elastic component  50  constantly abuts the guiding groove  22 . 
     In the embodiment, the guiding groove  22  includes a first fastening recess  22   a  and a second fastening recess  22   b , which are configured as the engagement points between the engaging end  51  of the third elastic component  50  and the guiding groove  22 , respectively. When the second elastic component  30  is constantly abutted between the inner-shaft component  60  and the inner-sleeve assembly  20 , the at least one third engaging portion  64  of the inner-shaft component  60  is engaged with the at least one second engaging portion  26  of the inner-sleeve assembly  20 . In that, the engaging end  51  of the third elastic component  50  is located at the first fastening recess  22   a  of the guiding groove  22 . When the inner-shaft component  60  is subjected to a force and driven to abut the second elastic component  30 , the engaging end  51  of the third elastic component  50  is driven by the inner-shaft component  60 , and moved along the guiding groove  22  to the second fastening recess  22   b  of the guiding groove  22 . In that, the at least one third engaging portion  64  of the inner-shaft component  60  and the at least one second engaging portion  26  of the inner-sleeve assembly  20  are separated from each other, and the inner-shaft component  60  is further received within the accommodation space  23  of the inner-sleeve assembly  20 . 
     On the other hand, in the embodiment, the inner-sleeve assembly  20  is detachably accommodated within the accommodation seat  11  of the housing  10 . When the inner-sleeve assembly  20  is located at the first position relative to the accommodation seat  11  of the housing  10 , the bottom portion  25  of the inner-sleeve assembly  20  is attached to the bottom surface of the accommodation seat  11  of the housing  10 , the two limiting portions  21   a ,  21   b  and the two first engaging portions  43   a ,  43   b  are engaged with each other, and the latching portion  44  of the latching component  40  passes through the lateral opening  12  of the housing  10  and is engaged with the fixed component  90 . On the other hand, when the bottom portion  25  of the inner-sleeve assembly  20  is separated from the bottom surface of the accommodation seat  11  of the housing  10  and moved into the second position relative to the accommodation seat  11  of the housing  10 , the two limiting portions  21   a ,  21   b  drive the latching component  40  to abut the two first elastic components  42   a ,  42   b  through the two first engaging portions  43   a ,  43   b , and the latching portion  44  is moved into the housing  10  through the lateral opening  12  of the housing  10 , so that the latching portion  44  and the fixed component  90  are separated. Moreover, in the embodiment, the two limiting portions  21   a ,  21   b  are for example but not limited to two corresponding triangular openings in communication with the accommodation space  23 . When the latching portion  44  of the latching component  40  is subjected to a force to abut the two first elastic components  42   a ,  42   b , the latching portion  44  of the latching component  40  is driven to pass through the lateral opening  12  of the housing  10  from the outside and moved inside the housing  10 . The operating relationship of the related components in the push-and-pull latch device  1  will be described in the followings. 
     In the embodiment, the push-and-pull latch device  1  further includes a stopper  80 . Preferably but not exclusively, with at least one first fastening component  81  such as a crew, the stopper  80  is disposed on the fixed component  90  of the object  9 . In the embodiment, the stopper  80  spatially corresponds to the latching portion  44  of the latching component  40 . When the latching portion  44  of the latching component  40  passes through the lateral opening  12  of the housing  10 , the latching component  40  and the stopper  80  are engaged with each other, so as to block the movable component  91  from moving relative to the fixed component  90 . Thus, it achieves the purpose of keeping the door or the drawer closed. Certainly, in other embodiment, the stopper  80  is omitted. When the latching portion  44  of the latching component  40  passes through the lateral opening  12  of the housing  10 , the latching component  40  and the fixed component  90  of the object  9  are engaged with each other directly, so as to block the movable component  91  from moving relative to the fixed component  90  and achieve the purpose of keeping the door or the drawer closed. The present disclosure is not limited thereto. 
     In the embodiment, the inner-shaft component  60  further includes an installation end  61  and an operation component  63 . Preferably but not exclusively, the operation component  63  is an I-shaped or T-shaped handle. The operation component  63  is disposed on the installation end  61  by a thread engagement method. In the embodiment, the installation end  61  and the operation component  63  of the inner-shaft component  60  spatially correspond to the installation opening  92  of the movable component  91 . In addition, the operation component  63  is exposed out of the movable component  91  through the installation opening  92 , so as to facilitate a user to push/pull the operation component  63 . Moreover, in the embodiment, the push-and-pull latch device  1  further includes an adjusting component  73 . Preferably but not exclusively, the adjusting component  73  is a spacer. The adjusting component  73  has an accommodation opening  74  and spatially corresponds to the installation opening  92 . In the embodiment, the adjusting component  73  is configured to adjust the position of the operation component  63  relative to the movable component  91 . For example, when the engaging end  51  of the third elastic component  50  is moved to the second fastening recess  22   b  of the guiding groove  22 , the operation component  63  is received within the accommodation opening  74  of the adjusting component  73 . In that, the operation component  63  is hidden in the installation opening  92  of the moving component  91  without being exposed out of the movable component  91 . Moreover, for example, when the inner-shaft component  60  drives the inner-sleeve assembly  20  to move into the second position relative to the accommodation seat  11  of the housing  10 , the operation component  63  is moved and exposed out of the accommodation opening  74  of the adjusting component  73 . Certainly, the present disclosure is not limited thereto. In the embodiment, the housing  10  further includes at least one second fastening component  72 . Preferably but not exclusively, the at least one second fastening component  72  passes through the installation hole  13  of the housing  10  and the cover  70  to fasten the housing  10  on the movable component  91 . In the embodiment, the adjusting component  73  is sleeved in the installation opening  92  of the movable component  91 , and the operation component  63  of the inner-shaft component  60  is aligned to the accommodation opening  74  of the adjusting component  73 . Since the operation component  63  can be selectively hidden or held, the user can drive the inner-shaft component  60  to move relative to the inner-sleeve assembly  20  or the housing  10  through a simple pressing action. The relative positions between the related components are switched to achieve the functions of opening, closing or locking the door or the drawer. 
     Please refer to  FIGS.  6  to  9   . In the embodiment, with the push-and-pull latch device  1  mounted on the movable component  91  of the object  9 , the movable component  91  and the fixed component  90  can be maintained in a closed state, as shown in  FIGS.  6  and  7   . At this time, the bottom portion  25  of the inner-sleeve assembly  20  is attached to the bottom surface of the accommodation seat  11  of the housing  10 , and the inner-sleeve assembly  20  is located at the first position relative to the accommodation seat  11  of the housing  10 . In addition, the two limiting portions  21   a ,  21   b  of the inner-sleeve assembly  20  are engaged with the two first engaging portions  43   a ,  43   b  of the latching component  40 , and the latching portion  44  of the latching component  40  is abutted by the force from the two first elastic components  42   a ,  42   b . The latching portion  44  of the latching component  40  passes through the lateral opening  12  of the housing  10  to engage with the fixed component  90 , so as to block the movable component  91  from moving relative to the fixed component  90 . On the other hand, since the second elastic component  30  is constantly abutted between the inner-shaft component  60  and the inner-sleeve assembly  20 , and the at least one third engaging portion  64  of the inner-shaft component  60  is engaged with the at least one second engaging portion  26  of the inner-sleeve assembly  20 . The engaging end  51  of the third elastic component  50  is located at the first fastening recess  22   a  of the guiding groove  22 , and the operation component  63  is exposed out of the movable component  91  for the user to perform pressing or holding and pulling operations. When the user presses the operation component  63 , the inner-shaft component  60  is forced to resist the second elastic component  30 , and the engaging end  51  of the third elastic component  50  is driven to move along the guiding groove  22  to the second fastening recess  22   b  at the same time. With the engagement between the engaging end  51  of the third elastic component  50  and the second fastening recess  22   b  of the guiding groove  22 , the elastic force of the second elastic element  30  disposed between the inner-shaft component  60  and the inner-sleeve assembly  20  is resisted, so that the least one third engaging portion  64  of the inner-shaft component  60  is separated from the at least one second engaging portion  26  of the inner-sleeve assembly  20 , and the inner-shaft component  60  is further accommodated within the accommodation space  23  of the inner-sleeve assembly  20  at the same time, as shown in  FIGS.  8  and  9   . As a result, the operation component  63  is displaced into the accommodation opening  74  of the adjusting component  73 , and hidden in the installation opening  92  of the movable component  91  without being exposed out of the installation opening  92 . The movable component  91  and the fixed component  90  are maintained in a latched state, thereby achieving the purpose of locking. When the user presses the operation component  63  again, the engaging end  51  of the third elastic component  50  is moved along the guiding groove  22  to the first fastening recess  22   a , and the elastic force of the second elastic component  30  is restored to act between the inner-shaft component  60  and the inner-sleeve assembly  20  again. As a result, the inner-shaft component  60  is displaced relative to the inner-sleeve assembly  20 , the at least one third engaging portion  64  of the inner-shaft component  60  is engaged with the at least one second engaging portion  26  of the inner-sleeve assembly  20 , and the operation component  63  is maintained and exposed out of the movable component  91 . It allows the user to perform the pressing or holding and pulling operations, as shown in  FIGS.  6  and  7   . 
     Please refer to  FIGS.  6 ,  7 ,  10  and  11   . As mentioned above, in the embodiment, the engaging end  51  of the third elastic component  50  is engaged with the first fastening recess  22   a  of the guiding groove  22 , and the second elastic component  30  is constantly abutted between the inner-shaft component  60  and the inner-sleeve assembly  20 . Meanwhile, the at least one third engaging portion  64  of the inner-shaft component  60  is engaged with the at least one second engaging portion  26  of the inner-sleeve assembly  20 , and the operation component  63  is exposed out of the movable component  91  for the user to perform the pressing or holding and pulling operations, as shown in  FIGS.  6  and  7   . When the user holds the operation component  63  and pulls the operation component  63 , since the at least one third engaging portion  64  of the inner-shaft component  60  is engaged with the at least one second engaging portion  26  of the inner-sleeve assembly  20 , the inner-shaft component  60  is driven by the inner-sleeve assembly  20  and moved to the second position relative to the accommodation seat  11  of the housing  10 , as shown in  FIGS.  10  and  11   . When the inner-sleeve assembly  20  is displaced relative to the accommodation seat  11  of the housing  10 , the two limiting portions  21   a ,  21   b  of the inner-sleeve assembly  20  drive the latching component  40  to move through the two first engaging portions  43   a ,  43   b  of the latching component  40  and resist the two first elastic component  42   a  and  42   b , so that the latching portion  44  passes through the lateral opening  12  and is moved into the housing  10 . At this time, the latching portion  44  is separated from the stopper  80  on the fixed component  90 , and the movable component  91  is forced to move or rotate relative to the fixed component  90 , thereby providing the function of opening the object  9 . When the user releases the operation component  63 , the elastic force of the two first elastic components  42   a ,  42   b  is restored to push against the latching component  40 , the latching portion  44  passes through the lateral opening  12  of the housing  10 , and the two first engaging portions  43   a ,  43   b  of the latching component  40  push against the two limiting portions  21   a ,  21   b  of the inner-sleeve assembly  20  at the same time, so that the inner-sleeve assembly  20  is forced to move to the first position relative to the accommodation seat  11  of the housing  10 , as shown in  FIG.  6   . Notably, since the two limiting portions  21   a ,  21   b  include the triangular openings in communication with the accommodation space  23 , when the latching portion  44  of the latching component  40  resists the two first elastic components  42   a ,  42   b , the latching portion  44  of the latching component  40  is moved into the housing  10  through the lateral opening  12  of the housing  10 . In other words, when the movable component  91  is maintained in the open state, the user can push the movable component  91  directly, and the stopper  80  on the fixed component  90  pushes the latch portion  44  of the latching component  40  by the closing action, so that the movable component  91  and the fixing component  90  are changed into the closed state, as shown in  FIG.  7   . Certainly, the present disclosure is not limited thereto and not redundantly described herein. 
       FIG.  12    is a perspective view illustrating the inner-sleeve assembly of the push-and-pull latch device according to the embodiment of the present disclosure.  FIG.  13    shows the engaging end of the third elastic component is located at the first fastening recess of the guiding groove in the push-and-pull latch device.  FIG.  14    shows the engaging end of the third elastic component is located at the second fastening recess of the guiding groove in the push-and-pull latch device. In the embodiment, the guiding groove  22  further includes a first channel  22   c  and a second channel  22   d . The first channel  22   c  is communicated between the first fastening recess  22   a  and the second fastening recess  22   b , and the second channel  22   d  is communicated between the second fastening recess  22   b  and the first fastening recess  22   a . In the embodiment, the function of the first channel  22   c  and the second channel  22   d  is communicated between the first fastening recess  22   a  and the second fastening recess  22   b . Preferably but not exclusively, the first channel  22   c  and the second channel  22   d  are partially crossed or joined with each other. It is adjustable according to the practical requirements. The present disclosure is not limited thereto. In the embodiment, the first channel  22   c  includes a plurality of inclined surfaces, and each of the inclined surfaces of the first channel  22   c  increases in height along a direction from the first fastening recess  22   a  to the second fastening recess  22   b . In that, a non-reverse sawtooth structure is formed on the bottom surface of the first channel  22   c . Similarly, the second channel  22   d  includes a plurality of inclined surfaces, and each of the inclined surfaces of the second channel  22   d  increases in height along a direction from the second fastening recess  22   b  to the first fastening recess  22   a . In that, a non-reverse sawtooth structure is formed on the bottom surface of the second channel  22   d . As shown in  FIG.  13   , when the engaging end  51  of the third elastic component  50  of the push-and-pull latch device  1  is located in the first fastening recess  22   a  of the guiding groove  22 , the engagement effect of the engaging end  51  of the third elastic component  50  and the first fastening recess  22   a  of the guiding groove  22  is generated to limit the second elastic component  30  or maintain the distance between the inner-shaft component  60  and the inner-sleeve assembly  20 . When the user pushes the inner-shaft component  60  to move relative to the inner-sleeve assembly  20 , the engaging end  51  of the third elastic component  50  is moved steadily from the first fastening recess  22   a  to the second fastening recess  22   b , and then the engaging end  51  of the third elastic component  50  is engaged with the second fastening recess  22   b  of the guiding groove  22 , as shown in  FIG.  14   . When the user presses the inner-shaft component  60  to move relative to the inner-sleeve assembly  20  again, the engaging end  51  of the third elastic component  50  is moved steadily from the second fastening recess  22   b  to the first fastening recess  22   a , and then the engaging end  51  of the third elastic component  50  is engaged with the first fastening recess  22   a  of the guiding groove  22 . In other embodiments, the arrangements of the first fastening recess  22   a , the second fastening recess  22   b , the first channel  22   c  and the second channel  22   d  are adjustable according to the practical requirements. The present disclosure is not limited thereto. 
     In summary, the present disclosure provides a push-and-pull latch device applied to a door lock or a drawer lock. With operations of an inner-shaft component and an inner-sleeve assembly, engaging portions of related components are driven to space apart or engage. In that, the latch device is driven by a simple pressing action in a limited operating space and it is conducive to achieving the functions of opening, closing or locking a door or a drawer. The overall structure is compact. It is easy to assemble, maintain and operate. The latch device has a compacted structure, and can be assembled easily. By driving the inner-shaft component and the elastic components to move relative to a guiding groove of the inner-sleeve assembly or the housing, the relative positions of the related components are switched. The operation component of the latch device can be hidden or held, and the user can drive the engaging portions of the related components in the latch device to space apart or engage by a simple pressing action. It is conducive to achieving the functions of opening, closing or locking a door or a drawer. Moreover, positioning of the inner-shaft component and the inner-sleeve assembly is further implemented by the movement of the elastic component relative to the guiding groove of the inner-sleeve assembly or the housing, to replace the conventional elastic tenon assembly. The complexity and difficulty of assembly are simplified effectively. The guiding groove includes a plurality of inclined surfaces segmented to form a non-reverse sawtooth structure. It is beneficial for one end of the elastic component to constantly abut the guiding groove, and to move steadily along the guiding groove to be positioned at a specific position. In that, the engaging portions of the related components are driven to space apart or engage, to achieve the operations of opening, closing or locking. Compared with the conventional tenon structure, the combination of the elastic component and the guiding groove is easier to assemble, replace or maintain. It enhances the competitiveness of the push-and-pull latch device effectively. 
     While the disclosure has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the disclosure needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.