Patent Publication Number: US-10330290-B2

Title: Salt lamp

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a lamp and, more particularly, to a salt lamp. 
     2. Description of the Related Art 
     A conventional salt lamp comprises a lampshade, a base secured on the lampshade, and a lampwick secured on the base and received in the lampshade. The conventional salt lamp contains a salt rock therein. However, the base and the lampshade are fastened by multiple locking screws, so that it is necessary for the user to disassemble the whole salt lamp to clean, repair or replace the lampwick, thereby causing inconvenience to the user. In addition, when the salt lamp is detached frequently for replacing or cleaning the lampwick, the salt lamp is easily worn out. 
     BRIEF SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a salt lamp having a detachable structure. 
     In accordance with the present invention, there is provided a salt lamp comprising a lampshade, a base detachably mounted on the lampshade, and a lampwick secured on the base. The lampshade has a bottom connected with an upper connecting cap. The base includes a lower connecting cap detachably connected with the upper connecting cap of the lampshade. The upper connecting cap of the lampshade is provided with a plurality of locking pieces. The lower connecting cap of the base is provided with a plurality of slideways corresponding to and allowing movement of the locking pieces of the upper connecting cap. Each of the slideways of the lower connecting cap is provided with an opening allowing entrance of each of the locking pieces of the upper connecting cap, a slope face guiding movement of each of the locking pieces of the upper connecting cap, and a projection locked onto each of the locking pieces of the upper connecting cap to secure the upper connecting cap to the lower connecting cap. 
     Preferably, the base further includes a circuit board electrically connected with the lampwick, and an electric plug connected with the circuit board and electrically connected with an external power supply. 
     Preferably, the a guiding cylinder is mounted on an outer face of the lampwick and is connected with the base. 
     Preferably, the base further includes a bottom cover connected with the lower connecting cap, and a retaining ring mounted on a side face of the lower connecting cap. 
     Preferably, the salt lamp further comprises a plurality of screws connecting the bottom cover with the lower connecting cap, connecting the guiding cylinder with the upper connecting cap, and connecting the lampshade with the upper connecting cap. 
     Preferably, the lampwick is connected with the lower connecting cap by a plurality of bolts. 
     Preferably, the lower connecting cap has a periphery provided with an annular water drain channel which is provided with a water drain hole connected outward from the lower connecting cap. 
     According to the primary advantage of the present invention, the lampwick is secured on the base, and the base is detachably mounted on the lampshade, so that the base can be detached from the lampshade for cleaning, maintenance or replacement of the lampwick. 
     According to another advantage of the present invention, each of the locking pieces of the upper connecting cap is locked by the projection of each of the slideways, to prevent the upper connecting cap from being rotated reversely and detached from the lower connecting cap 
     According to a further advantage of the present invention, the lampwick is moved into the lampshade easily by guidance of the guiding cylinder 
     According to a further advantage of the present invention, the guiding cylinder protects the lampwick during assembly, disassembly and replacement of the lampwick. 
     Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) 
         FIG. 1  is a perspective view of a salt lamp in accordance with the preferred embodiment of the present invention. 
         FIG. 2  is a partially exploded perspective view of the salt lamp in accordance with the preferred embodiment of the present invention. 
         FIG. 3  is a perspective view showing connection of a lampshade and an upper connecting cap in accordance with the preferred embodiment of the present invention. 
         FIG. 4  is a perspective view of a guiding cylinder in accordance with the preferred embodiment of the present invention. 
         FIG. 5  is a perspective view of the upper connecting cap in accordance with the preferred embodiment of the present invention. 
         FIG. 6  is a front perspective view of a lower connecting cap in accordance with the preferred embodiment of the present invention. 
         FIG. 7  is a locally enlarged view of the lower connecting cap taken along circle “M” as shown in  FIG. 6 . 
         FIG. 8  is a rear perspective view of the lower connecting cap in accordance with the preferred embodiment of the present invention. 
         FIG. 9  is a locally enlarged view of the lower connecting cap taken along circle “N” as shown in  FIG. 8 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIGS. 1-9 , a salt lamp in accordance with the preferred embodiment of the present invention comprises a lampshade  1 , a base  3  detachably mounted on the lampshade  1 , and a lampwick  21  secured on the base  3 . The lampshade  1  has a bottom connected with an upper connecting cap  11 . The base  3  includes a lower connecting cap  31  detachably connected with the upper connecting cap  11  of the lampshade  1 . 
     In the preferred embodiment of the present invention, the upper connecting cap  11  of the lampshade  1  is provided with a plurality of locking pieces  111 . The lower connecting cap  31  of the base  3  is provided with a plurality of slideways  311  corresponding to and allowing movement of the locking pieces  111  of the upper connecting cap  11 . Each of the slideways  311  of the lower connecting cap  31  is provided with an opening allowing entrance of each of the locking pieces  111  of the upper connecting cap  11 , a slope face  312  guiding movement of each of the locking pieces  111  of the upper connecting cap  11 , and a projection  313  locked onto each of the locking pieces  111  of the upper connecting cap  11  to secure the upper connecting cap  11  to the lower connecting cap  31 . 
     In assembly, when the upper connecting cap  11  is mounted on the lower connecting cap  31 , each of the locking pieces  111  of the upper connecting cap  11  extends through the opening into each of the slideways  311  of the lower connecting cap  31 . Then, the upper connecting cap  11  is rotated relative to the lower connecting cap  31 , so that each of the locking pieces  111  of the upper connecting cap  11  is moved on the slope face  312  to reach the projection  313  of each of the slideways  311 . After each of the locking pieces  111  of the upper connecting cap  11  passes the projection  313  of each of the slideways  311 , each of the locking pieces  111  of the upper connecting cap  11  is locked by the projection  313  of each of the slideways  311 , so that the upper connecting cap  11  is locked onto the lower connecting cap  31 . It is appreciated that, the locking pieces  111  of the upper connecting cap  11  are moved easily into the slideways  311  of the lower connecting cap  31  by guidance of the slope face  312 . In addition, the locking pieces  111  of the upper connecting cap  11  are positioned in the slideways  311  of the lower connecting cap  31  by locking of the projection  313 . 
     On the contrary, when the upper connecting cap  11  is rotated reversely relative to the lower connecting cap  31 , each of the locking pieces  111  of the upper connecting cap  11  is unlocked and detached from the projection  313  of each of the slideways  311  and is moved on the slope face  312  to reach the opening of each of the slideways  311 , so that the locking pieces  111  of the upper connecting cap  11  are released from the slideways  311  of the lower connecting cap  31 , and the upper connecting cap  11  is detached from the lower connecting cap  31 . 
     In the preferred embodiment of the present invention, the base  3  further includes a circuit board  34  electrically connected with the lampwick  21 , and an electric plug  35  connected with the circuit board  34  and electrically connected with an external power supply. 
     In the preferred embodiment of the present invention, a guiding cylinder  22  is mounted on an outer face of the lampwick  21  and is connected with the base  3 . The guiding cylinder  22  protects the lampwick  21  during detachment and replacement of the lampwick  21  to prevent the lampwick  21  from being worn out or broken during detachment of the salt lamp. In addition, the guiding cylinder  22  guides the lampwick  21  during assembly of the lampwick  21 . 
     In the preferred embodiment of the present invention, the base  3  further includes a bottom cover  32  connected with the lower connecting cap  31 , and a retaining ring  33  mounted on a side face of the lower connecting cap  31 . The bottom cover  32  and the lower connecting cap  31  form a chamber therebetween to receive the circuit board  34 . 
     In the preferred embodiment of the present invention, the salt lamp further comprises a plurality of screws  41  connecting the bottom cover  32  with the lower connecting cap  31 , connecting the guiding cylinder  22  with the upper connecting cap  11 , and connecting the lampshade  1  with the upper connecting cap  11 . 
     In the preferred embodiment of the present invention, the lampwick  21  is connected with the lower connecting cap  31  by a plurality of bolts  42 . 
     In the preferred embodiment of the present invention, the lower connecting cap  31  has a periphery provided with an annular water drain channel  314  which is provided with a water drain hole  315  connected outward from the lower connecting cap  31 . Thus, the water flowing downward from the lampshade  1  flows through the water drain channel  314  and the water drain hole  315  of the lower connecting cap  31  and is drained outward from the salt lamp. 
     In the preferred embodiment of the present invention, the base  3  further includes a humidity control switch. The surface of the salt lamp absorbs water in the wet weather. Thus, when the humidity of the salt lamp reaches a preset value, the humidity control switch is started to turn on the lampwick  21  so as to evaporate the water on the surface of the salt lamp. 
     Accordingly, the lampwick  21  is secured on the base  3 , and the base  3  is detachably mounted on the lampshade  1 , so that the base  3  can be detached from the lampshade  1  for cleaning, maintenance or replacement of the lampwick  21 . In addition, each of the locking pieces  111  of the upper connecting cap  11  is locked by the projection  313  of each of the slideways  311 , to prevent the upper connecting cap  11  from being rotated reversely and detached from the lower connecting cap  31 . Further, the lampwick  21  is moved into the lampshade  1  easily by guidance of the guiding cylinder  22 . Further, the guiding cylinder  22  protects the lampwick  21  during assembly, disassembly and replacement of the lampwick  21 . 
     Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the scope of the invention.