Decorative lamp structure

An improved decorative lamp structure, which has a shell socket with inner threads on the inner surface thereof so as to engage with a shell portion for decoration purpose; the other end of the shell socket has a cylindrical part, of which the outer surface is furnished with symmetrical vertical channels; between the vertical channel and the cylindrical hole, there is an even thickness and width so as to let at least one power wire pass through. A portion of the cylindrical surface without vertical channel is furnished with a round groove. The center of the cylindrical part has a cylindrical hole for receiving the socket housing, of which one end has a socket to be plugged with a decorative lamp. The socket housing extends into the center of the shell portion. The inner surface of a cap is furnished with a fluke ring to be engaged with a round groove on the cylindrical surface after the cap being pressed on the cylindrical part of the shell socket so as to prevent the cap and the shell socket from being separated unintentionally.

BACKGROUND OF THE INVENTION 
1. This invention relates to a decorative lamp, and particularly to a 
decorative lamp with an elongate cylinder portion, which is to be mounted 
in a decorative shell portion. mounted in a decorative shell portion. 
2. Description of the Prior Art 
In the conventional decorative lamp string for Christmas, the two wires of 
a small bulb usually pass through a hole in the socket thereof; then, the 
two wires will be bent and mounted on two side walls in a seat; a socket 
to mount the seat has two copper contactors fixed therein. After a small 
bulb is plugged in the socket, the two wires bent will be in contact with 
the two copper contactors respectively; then, the socket will be connected 
with the power wires into a string. 
In the conventional lamp string for Christmas season, the decorative lamp 
is plugged directly to a decorative shell so as to have a better 
decoration effect; the lamp and the decorative shell will put on a 
Christmas tree; however, since the decorative shell and the lamp are not 
connected firmly together, they are subject to being separated from each 
other. 
In the conventional lamp structure for Christmas decoration, a U.S. Pat. 
No. 5,414,605 has disclosed that, wherein the lamp holder has a vertical 
cylinder housing and a lamp seat, the cylinder housing is made of an 
insulating material and has an open top and bottom wall, the lamp seat is 
mounted securely on the bottom wall of the cylindrical housing and a wire 
passage formed there through so as to define an annular groove between the 
lamp seat and the cylindrical housing. The transport lampshade covers the 
lamp and has annular on the lamp seat under the inward flange of the 
cylindrical rubber seal. The outward flange of the lampshade has an outer 
diameter which is slightly greater than the inner diameter of the inward 
flange can be pushed or pulled forcibly to extend through the inward 
flange of the rubber seal. 
SUMMARY OF THE INVENTION 
The prime object of the present invention is to provide a decorative lamp 
structure, in which the inside of the shell socket is furnished with inner 
threads to be engaged with the threads of a shell portion; one end of the 
shell socket has a cylindrical part, of which the center has a cylindrical 
hole for receiving an elongate socket housing. One end of the socket 
housing has a socket for receiving a decorative lamp, which can extend 
into the center of a shell portion. The upper end of the cylindrical part 
of the shell socket is to be covered with a cap so as to have the socket 
housing and the shell socket connected together. 
Another object of the present invention is to provide a decorative lamp 
structure, in which two symmetrical sides of the cylindrical part of the 
shell socket are provided with two vertical channels respectively; each of 
the vertical channels has a suitable depth and width. Between the vertical 
channel and the cylindrical hole, there is an even thick wall. The part of 
the cylindrical surface 37 without having the vertical channel is 
furnished with a round groove, which is to be engaged with the fluke ring 
of the cap upon the cap being mounted on the shell socket. The power wires 
pulled out of the guide hole of the socket housing will pass through the 
vertical channel. 
Still another object of the present invention is to provide a decorative 
lamp structure, in which the center of the cylindrical part on the shell 
socket has a cylindrical hole for receiving the socket housing. The power 
wires pulled out of the guide hole will pass through the vertical channel; 
the power wires will be fastened in place after the cap being put over the 
cylindrical part because the guide channel of the cap becoming engaged 
with the vertical channel. 
A further object of the present invention is to provide a decorative lamp 
structure, in which the cylindrical part of the shell socket has vertical 
channels having a suitable width and depth for receiving several power 
wires to be pulled out.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
This invention relates to a decorative lamp structure. As shown in FIGS. 1 
and 2, the lower part of the shell socket 13 is mounted with a lamp shell 
15, being similar to a bulb. The lamp shell 15 is also designed into a 
polygonal shell, or other suitable shapes. 
Referring to FIGS. 3 to 6, the decorative lamp 10 comprises a cap 11, a 
socket housing 12, a shell socket 13, a decorative lamp 14, a lamp shell 
15, power wires 16 and copper contactors 20. The inner surface of the 
shell socket 13 is furnished with inner threads 36 for fastening the lamp 
shell in place. The center of the shell socket 13 has a cylindrical hole 
32 for mounting the socket housing 12 therein. The decorative lamp 14 is 
to be plugged in the socket 17 of the socket housing 12; the other end of 
the socket housing 12 has a guide hole 28 for the power wires 16 to pull 
out. The socket housing 12 is to be inserted into the cylindrical hole 32 
of the cylindrical part 29. The power wires 16 are to be pulled out along 
the vertical channel 30 outside the cylindrical part 29 of the shell 
socket 13. After the cap 11 is mounted in place, the hook will also be put 
in place. 
The shell socket 13 of the decorative lamp 10 is provided with a suitable 
outer form. The upper part of the shell socket 13 has a cylindrical part 
29, of which the center has a cylindrical hole 32; the other end of the 
shell socket 13 has a suitable depth and space furnished with inner 
threads 36 to be engaged with the outer threads 34 of the lamp shell 15. 
The cylindrical hole 32 in the center of the cylindrical part 29 is used 
for mounting the cylinder portion 25 of the socket housing 12, and the 
hole 32 has a suitable depth so as to fasten the socket housing 12 in 
place. The cylindrical surface 37 on the cylindrical part 29 has a round 
groove 31, and both sides of the cylindrical surface 37 are provided with 
two symmetrical vertical channels 30 having a given depth and width. The 
depth of the vertical channel 30 is equal to or slightly less than the 
diameter of the power wire 16, and the width thereof can at least receive 
more than one power wire 16. The thickness between the vertical channel 30 
and the cylindrical hole 32 is even and thick enough so as to withstand 
the pulling force of the power wires 16 pulled out of the guide hole 28 
and along the vertical channels 30. 
The inner surface of the shell socket 13 is furnished with inner threads 36 
to be engaged with the outer threads 34 of the round surface 40 of the 
lamp shell 15. The center of the round surface 40 has a cylindrical hole 
35, of which the diameter is larger than that of the cylinder portion 25 
of the socket housing 12. The neck portion 33 of the lamp shell 15 extends 
downwards to form into a shell portion. The outer threads 34 of the round 
surface 40 of the lamp shell 15 is to be engaged with the inner threads 36 
in the inner surface of the shell socket 13. In case of the bulb 19 of the 
decorative lamp 14 being broken, it can be replaced with a new one after 
the lamp shell 15 being disassembled. 
One end of the cylinder portion 25 of the socket housing 12 has a socket 
17, while the other end thereof has a round top 26; the inside of lower 
end of the socket 17 of the socket housing 12 has a channel surface 38 for 
mounting two copper contactors 20 on both sides thereof. The lowest part 
of the lower end is furnished with a socket inner surface 39 for mounting 
a decorative lamp 14. Above the channel surface 38, there is a guide hole 
28 to facilitate the power wires 16 to pull out. After a decorative lamp 
14 is plugged into the socket 17, two wires of the bulb 19 will be in 
close contact with the two copper contactors 20 respectively; the bulb 
socket 18 is to be mounted on the socket inner surface 39 of the socket 
17. The socket housing 12 has an elongate cylinder portion 25, of which 
the upper end has a round top 26; the diameter of the cylinder portion 25 
is equal to or slightly less than that of the cylindrical hole 32 of the 
shell socket 13; the diameter of the round top 26 is larger than that of 
the cylindrical hole 32, but less than that of the vertical channel 30. 
After the socket housing 12 is plugged into the cylindrical hole 32 of the 
shell socket 13, the flange 27 between the cylinder portion 25 and the 
round top 26 will be stopped on the opening of the cylindrical hole 32 of 
the cylindrical part 29 on the shell socket 13. 
The cap 11 to be mounted on the cylindrical part 29 has a deep internal 
surface 21 therein; the diameter of the internal surface 21 is equal to or 
slightly larger than that of the cylindrical part 29. Both sides of the 
opening of the cap 11 are furnished with two symmetrical guide channels 
22, while the inner surface of the cap having no guide channel is provided 
with a fluke ring 23, which will be engaged with the round groove 31 on 
the cylindrical surface 37 upon the cap 11 mounting on the cylindrical 
part 29 of the shell socket 13 so as to prevent the cap 11 from being 
separated from the shell socket 13. The opening of the cap 11 has two 
symmetrical guide channels 22 with a suitable depth so as to facilitate 
power wires 16 to pull out after the cap 11 being mounted on the shell 
socket 13. 
The shell socket 13 and the shell portion 15 may be assembled together 
before or after the socket housing 12 and the shell socket 13 being 
assembled together. The socket 17 of the socket housing 12 is used for 
mounting the decorative lamp 14; the power wires 16 are to be pulled out 
of the other end thereof. The cylinder portion 25 of the socket housing 12 
is to be plugged into the cylindrical hole 32 of the shell socket 13; the 
flange 27 is to be stopped on the opening of the cylindrical hone 32. The 
decorative lamp 14 plugged into the socket 17 of the socket housing 12 is 
located outside of the internal surface 21 of the shell socket 13. If the 
shell portion 15 is mounted in the internal surface of the shell socket 13 
first, the decorative lamp 14 will be located in the central part in the 
shell portion 15. The power wires 16 may be pulled out of the guide hole 
28 of the socket housing 12 in two different methods, of which the first 
method is to have the two power wires 16 pulled out oppositely thorough 
the two vertical channels 30 on both sides of the cylindrical hole 32 
respectively, while the second method is to have the two power wires 16 or 
more than two wires pulled out through the vertical channel 30 and pressed 
in place by means of the symmetrical guide channels 22 of the cap 11 after 
the cap 11 being mounted to the cylindrical part 29. After the cap 11 is 
mounted in place, the fluke ring 23 on the internal surface 21 will be 
engaged with the round groove 31 on the cylindrical surface 37 of the 
cylindrical part 29 so as to prevent the cap 11 and the shell socket 13 
from separated unintentionally, and to have the socket housing 12 fixed in 
place. In case of the decorative lamp 14 being damaged, the shell portion 
15 may be separated from the shell socket 13 so as to replace the 
decorative lamp 14. 
The embodiment of the present invention has been described in detail to 
disclose the features and structure thereof; it is apparent that the 
present invention has shown the improvement thereof, which is never 
anticipated and accomplished by others so far; the structure of the 
present invention is deemed unique.