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(11) | EP 3 324 100 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | DECORATIVE LED STRING LIGHT |
| (57) A decorative LED string light comprising at least one lampshade (1), at least one
lampholder (2), and at least one LED bulb (5), each lampholder (2) is provided with
a wire hole (3), the inner wall of the upper end of the wire hole (3) is provided
with one or more annular bosses (7), the lower part of each lampshade (1) is provided
with a tubular connecting base (8), and the outer wall of the tubular connecting base
(8) is provided with an annular groove (9) which is fitted tightly with the annular
boss (7); conducting wires (4) are soldered on the bulb pins of the two poles at the
end portion of each LED bulb (5), the LED bulb (5) passes through the wire hole (3),
and installed in the internal cavity of the tubular connecting base (8) after extending
out of the top of each lampholder (2).
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FIELD OF THE INVENTION
[0001] The present invention relates to an LED lamp, and in particular to a decorative LED string light.
BACKGROUND OF THE INVENTION
[0002] In the structure of an existing LED Christmas string light, wires are fastened into a lamp holder after wire stripping and terminal crimping. An LED is fixed (also called solidified) in a plastic molded lamp housing by glue and then inserted into a soft core. Finally, the soft core with the LED bulbs is mounted onto each lampholder according to the correct polarities by a "flower arranging" process. The string light with such a structure is complex in process. Moreover, adverse problems such as terminal glue packaging, incomplete solidification, poor pin bending and reverse installation of polarity may occur easily. Hence, the string light with such a structure has a low efficiency in automation, high repairing rate and high cost, in the process of production.
SUMMARY OF THE INVENTION
[0003] In order to overcome the defects of the prior art, the present invention provides a novel decorative LED string light which has advantages as, but not limited to: easy to mount, high structural stability, high automated productivity, and low in cost.
[0004] The technical solution which is adopted to solve the technical problems by the present invention is as follows:
The present invention discloses a decorative LED string light comprising: at least one lampholder, the bottom of each lampholder is provided with a wire hole running through the top of each lampholder, wherein the upper end of the inner wall of the wire hole is provided with one or more annular bosses; at least one lampshade, the lower part of each lampshade is provided with a tubular connecting base, wherein the outer wall of the tubular connecting base is provided with an annular groove which is fitted tightly with the annular bosses; at least one LED bulb, conducting wires are soldered on bulb pins of two poles at the end portion of each LED bulb, the LED bulb passes through the wire hole, and are installed in an internal cavity of the tubular connecting base after extending out of the top of each lampholder.
[0005] As an improvement of the above-mentioned technical solution, the lower end of the inner wall of the wire hole is provided with a fastening platform, an insulation limit pillar is placed between the bulb pins of the two poles of each LED bulb, and the bottom of the insulation limit pillar is mounted on the fastening platform.
[0006] Further, the insulation limit pillar is sized to have a smaller upper portion and a bigger lower portion, and both sides of the insulation limit pillar are provided with wire-fastening grooves.
[0007] As an improvement of the above-mentioned technical solution, an insulation rod is placed between the bulb pins of the two poles of each LED bulb, the insulation rod is wrapped with an insulation heat-shrinkable sleeve, and a rear plug is further installed at the bottom of the wire hole.
[0008] Further, the rear plug is located between the conducting wires, and both sides of the rear plug are provided with tooth sockets.
[0010] Further, the lampshades are made into shapes including a Christmas bubble, a bullet head, a strawberry and an ice cream.
[0012] Further, an upper end of the outer wall of each lampholder is provided with at least one wire hook.
[0013] The advantages of the present invention are as follows: the connection between each LED bulb and the wires in the present invention is of a soldered structure, as the current automatic soldering technology is constantly developing and becoming mature, and as the reliability of the electrical connection of the soldered structure and production efficiency are increasing greatly, the string light product can be made quickly and reliably. Furthermore, for the string lights with such a structure, polarities are required to be distinguished only when a LED bulb is soldered, thus it is better than conventional terminals. Meanwhile, each lampholder and lampshade are connected by matching the annular boss with the annular groove , so that the lampshades are simpler to use, without a necessary of solidifying with glue, therefore there is no potential problems caused by the complex production process due to the glue solidification.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention is further described below in combination with the drawings and embodiments, in which:
Fig. 1 is a breakdown structural schematic diagram of the first embodiment of the present invention;
Fig. 2 is a breakdown structural cross-sectional view of the first embodiment of the present invention;
Fig. 3 is a mounting structural cross-sectional view of the first embodiment of the present invention;
Fig. 4 is a breakdown structural cross-sectional view of the second embodiment of the present invention;
Fig. 5 is a mounting structural cross-sectional view of the second embodiment of the present invention;
Fig. 6 is a structural schematic diagram of the present invention, wherein a hanging hook is arranged on the outer wall of a lampholder 2;
Fig. 7 is a structural schematic diagram of the present invention, wherein a fastening platform is arranged to match with the hanging hook;
Fig. 8 is a rear view of the present invention, wherein a wire hook is arranged on the outer wall of each lampholder 2;
Fig. 9 is a structural schematic diagram of mounting on an ice bar-shaped string light of the present invention; and
Fig. 10 is a structural schematic diagram of mounting on a net-shaped string light of the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] Each of Fig.1-6, 8-10 shows a unit of a decorative LED string light according to the present invention.
[0016] Referring to Fig. 1 and Fig. 2, the present invention discloses a decorative LED string light comprising at least one lampshade 1, at least one lampholder 2, and at least one LED bulb 5. Each lampholder 2 is provided with a wire hole 3, the inner wall of the upper end of the wire hole 3 is provided with one or more annular bosses 7. The lower part of each lampshade 1 is provided with a tubular connecting base 8, and the outer wall of the tubular connecting base 8 is provided with an annular groove 9 which is fitted tightly with the annular boss 7. Conducting wires 4 are soldered on the bulb pins of the two poles at the end portion of each LED bulb 5. The LED bulb 5 passes through the wire hole 3, and are installed in the internal cavity of the tubular connecting base 8 after extending out of the top of each lampholder 2. The connection between each LED bulb 5 and the conducting wires 4 in the present invention is of a soldered structure, as the current automatic soldering technology is constantly developing and becoming mature, the reliability of the electrical connection of the soldered structure and production efficiency are increased greatly, so that a product can be made quickly and reliably. Furthermore, for the string lights with such a structure, polarities are required to be distinguished only when a LED bulb 5 is soldered, thus it is better than conventional terminals. Meanwhile, each lampholder 2 and lampshade 1 are connected by matching the annular boss 7 with the annular groove 9, so that the lampshades 1 are simpler to use, without a necessary of solidifying with glue, therefore there is no potential problems caused by the complex production process due to the glue solidification.
[0017] Referring to Fig. 2 and Fig. 3, in a first embodiment of the present invention, the hole wall of the lower end of the wire hole 3 is provided with a fastening platform 10, an insulation limit pillar 6 is also placed between the bulb pins of the two poles of each LED bulb 5, and the bottom of the insulation limit pillar 6 is mounted on the fastening platform 10. The insulation limit pillar 6 can not only isolate the bulb pins of the two poles of each LED bulb 5 to prevent short circuit, but also can conveniently accurately position the LED bulb 5. Moreover, by matching the bottom of the insulation limit pillar 6 with the fastening platform 10, the conducting wires 4 in the wire hole 3 can be installed tightly to each lampholder 2 in accordance with the requirement of safety with respect to fixed tension force, and preventing solder joints from being stressed or pulled.
[0018] In order to facilitate the installation of the insulation limit pillar 6, the insulation limit pillar 6 is sized to be smaller in an upper portion and bigger in a lower portion thereof, and both sides of the insulation limit pillar 6 are further provided with wire-fastening grooves for placing and fixing the conducting wires 4.
[0019] Referring to Fig. 4 and Fig. 5, in another embodiment of the present invention, an insulation rod 11 is placed between the bulb pins of the two poles of each LED bulb 5, which are wrapped by an insulation heat-shrinkable sleeve 12. A rear plug 13 is installed on the bottom of the wire hole 3. The above-mentioned structure also adopts the insulation heat-shrinkable sleeve 12 to wrap the whole electrical parts, while utilizing the insulation rod 11 to isolate the bulb pins of the two poles of each LED bulb 5 to prevent short circuit, so that the product has higher safety performance while being produced at high efficiency. Moreover, the conducting wires 4 are fixed by way of installing the rear plug 13 at the bottom of each lampholder 2, so that the structure of the whole product is tighter, safer and more reliable.
[0020] The rear plug 13 is located between two conducting wires 4, and both sides of the rear plug 13 are provided with tooth sockets. The above-mentioned structure can effectively prevent the wires from sliding.
[0021] In order to conveniently install the rear plug 13 between the two conducting wires 4, the top of the rear plug 13 is provided with a protrusion.
[0022] Preferably, there may be four optional styles for the lampshades 1, including a Christmas bubble, a bullet head, a strawberry and an ice cream. Of course, also there are other styles such as a sphere, etc., according to actual circumstance.
[0023] Referring to Fig. 6 and Fig. 7, there is a fastening rack a for mounting the string light, the fastening rack a is provided with fastening holes a1, and in order to conveniently mount the string light product on the fastening rack a, the upper end of the outer wall of each lampholder 2 is provided with a hanging hook 14 matching with the fastening hole a1.
[0024] Referring to Fig. 8, Fig. 9 and Fig. 10, in order to conveniently produce the product into an ice bar-shaped or net-shaped string light, the upper end of the outer wall of each lampholder 2 is provided with at least one wire hook 15 for fixing wires; and the product can be mounted on a wire b of the ice bar-shaped or net-shaped string light by means of the wire hook 15.
at least one lampholder (2), the bottom of each lampholder (2) is provided with a wire hole (3) running through the top of each lampholder (2), wherein
the upper end of the inner wall of the wire hole (3) is provided with one or more annular bosses (7),
at least one lampshade (1), the lower part of each lampshade (1) is provided with a tubular connecting base (8), wherein
the outer wall of the tubular connecting base (8) is provided with an annular groove (9) which is fitted tightly with the annular bosses (7),
at least one LED bulb (5), conducting wires (4) are soldered on bulb pins of two poles at the end portion of each LED bulb (5), each LED bulb (5) passes through the wire hole (3), and installed in an internal cavity of the tubular connecting base (8) after extending out of the top of each lampholder (2).