U-shaped LED tube

Abstract

The present invention discloses a U-shape LED tube, comprising a U-shape tube body and light bars fixed inside the U-shape tube body. The U-shape tube body comprises two straight tube sections and one curved section, the curved section comprises two semicircle tubes, the two ends of the curved section are provided with shrinkage parts that are inserted in the straight tube sections, and the shrinkage parts are in fixed connection with the straight tube sections through ultrasonic welding. The curved section of the present invention is provided with shrinkage parts that are inserted in the straight tube sections, the outer diameters of the tubes of each part are consistent, achieving streamline aesthetic appearance; the shortcomings of tube body corrosion and light emission blockage due to fixing of light bar with adhesive glue in conventional LED tube are overcome through ultrasonic welding.

Claims

1. A U-shape LED tube, comprising a U-shape tube body and light bars fixed inside the U-shape tube body, the U-shape tube body comprises two straight tube sections and one curved section, and the curved section comprises two semicircle tubes, which is characterized in that: the two ends of the curved section are provided with shrinkage parts that are inserted in the straight tube sections, and the shrinkage parts are in fixed connection with the straight tube sections through ultrasonic welding; wherein the light bar comes in integrated construction, and an inward depression or concave on the edge of the light bar is provided at the connecting point between the shrinkage part and the straight tube section; wherein each of the two straight tube sections are in integrated construction; and wherein an outer diameter of the shrinkage part is less than that of the straight tube section, and an inner diameter of the shrinkage part is the same as that of the straight tube section.

2. The U-shape LED tube according to claim 1, which is characterized in that, the two semicircle tubes are connected with each other through ultrasonic welding.

3. The U-shape LED tube according to claim 1, which is characterized in that: the inside of the straight tube section is provided with snap-in grooves that fit the edge of the light bar and fix the light bar.

4. The U-shape LED tube according to claim 3, which is characterized in that: an inner wall of the straight tube section is provided with a fastening strip that extends along the length direction, the snap-in groove is formed by the fastening strip together with the inner wall of the straight tube section.

5. The U-shape LED tube according to claim 4, which is characterized in that: the shrinkage section is provided with a notch that avoids the fastening strip.

6. The U-shape LED tube according to claim 1, which is characterized in that: the curved section is provided with a stop block that fixes to the light bar.

7. The U-shape LED tube according to claim 1, which is characterized in that: step structures that snap in each other are provided at the seam between the two semicircle tubes.

8. The U-shape LED tube according to claim 1, which is characterized in that: a positioning mechanism comprising a positioning pin and a positioning hole is provided between the two semicircle tubes.

9. The U-shape LED tube according to claim 1, which is characterized in that: the U-shape LED tube comprises lamp holders that fit the two ends of the U-shape tube body, and an integrated linkage is provided between the two lamp holders.

10. A U-shape LED tube, comprising a U-shape tube body and light bars fixed inside the U-shape tube body, the U-shape tube body comprises two straight tube sections and one curved section, and the curved section comprises two semicircle tubes, which is characterized in that: the two ends of the curved section are provided with shrinkage parts that are inserted in the straight tube sections, and the shrinkage parts are in fixed connection with the straight tube sections through ultrasonic welding; wherein the light bar comes in integrated construction, and an inward depression or concave on the edge of the light bar is provided at the connecting point between the shrinkage part and the straight tube section; wherein each of the two straight tube sections are in integrated construction; wherein an outer diameter of the shrinkage part is less than that of the straight tube section, and an inner diameter of the shrinkage part is the same as that of the straight tube section; wherein the two semicircle tubes are connected with each other through ultrasonic welding; wherein the inside of the straight tube section is provided with snap-in grooves that fit the edge of the light bar and fix the light bar; wherein an inner wall of the straight tube section is provided with a fastening strip that extends along the length direction, the snap-in groove is formed by the fastening strip together with the inner wall of the straight tube section; wherein the shrinkage section is provided with a notch that avoids the fastening strip; wherein the curved section is provided with a stop block that fixes to the light bar; wherein step structures that snap in each other are provided at the seam between the two semicircle tubes; wherein a positioning mechanism comprising a positioning pin and a positioning hole is provided between the two semicircle tubes; and wherein the U-shape LED tube further comprises lamp holders that fit the two ends of the U-shape tube body, and an integrated linkage is provided between the two lamp holders.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is illustration of the construction of the U-shape tube of the present invention.

(2) FIG. 2 is the section view of the U-shape tube illustrated in FIG. 1 in direction A-A.

(3) FIG. 3 is the enlarged view of C location in FIG. 2.

(4) FIG. 4 is the section view of the U-shape tube illustrated in FIG. 1 in direction B-B.

(5) FIG. 5 is the enlarged view of D location in FIG. 4.

(6) FIG. 6 is exploded view of the construction of the U-shape tube of the present invention.

(7) FIG. 7 is the enlarged view of E location in FIG. 6.

SPECIFIC EMBODIMENTS OF THE INVENTION

(8) As shown in FIG. 1 and FIG. 6, a U-shape tube, comprising: a U-shape tube body 1, a light bar 3 in the U-shape tube body 1 and lamp holders 2 at the two ends of the U-shape tube body 1, wherein the U-shape tube body 1 is made of plastic material, comprising two straight tube sections 11 and one curved section 12, the two ends of the curved section 12 are provided with shrinkage part 125 that is inserted into the straight tube section 11, the outer diameter of the shrinkage part 125 is slightly less than that of the straight tube section 11, the inner diameter is the same as that of the straight tube section 11, it is in fixed connection with the straight tube section 11 through ultrasonic welding. After connection, the overall outer diameters of the U-shape tube body 1 are even and consistent without expansion node formed at the connecting point.

(9) As shown in FIGS. 2, 3 and 6, the curved section 12 comprises a semicircle tube 121 and a semicircle tube 122; a flange 124 and a snap-in groove 123 fitting each other are provided at the seam between the two semicircle tubes, the flange 124 is inserted into the snap-in groove 123, and the two semicircle tubes are in fixed connection through ultrasonic welding. Alternatively, the flange can be formed at the semicircle tube 121, and two opposite flanges form a mutually snap-in step structure, providing sealing effect. As shown in FIG. 7, positioning hole 127 and positioning pin 128 are further provided at the seam, and the positioning or alignment hole and positioning pin constitute the positioning mechanism, through which the two semicircle tubes can be accurately aligned for easy assembly.

(10) Light bar 3 comprises base plate and a plurality of LED beads arranged on the base plate, the base plate adopts metal base plate such as aluminum and copper materials, the base plate is further arranged with drive circuit to convert mains supply into DC power. In order to improve safety, inward depression or concave 31 at the edge of light bar 3 is provided at the connecting point between shrinkage part 125 and straight tube section 11, and depression or concave 31 can increase the creepage distance between the base plate and the tube body to improve safety.

(11) In order to fix the light bar 3, the straight tube section 11 is provided with a fastening strip 111 extended in the length direction, the fastening strip 111 and the tube wall together form snap-in grooves 112, the spacing between the two snap-in grooves 112 is consistent with the width of the base plate, and the light bar 3 is clamped by the tube walls to prevent light bar 3 from shaking. Furthermore, to prevent the light bar 3 from shaking at the curved section, the stop block 129 is provided in the curved section 12 to fix the light bar 3, when assembling, the light bar 3 is held down by the stop block 129.

(12) Due to that the shrinkage part 125 is inserted into the straight tube section 11, interference with the fastening strip 111 is unavoidable. To solve this problem, a notch 126 for avoiding the fastening strip 111 is provided at the shrinkage part 125. The arrangement of the snap-in grooves 112 come in multiple forms, for example, groove can be directly made on the tube wall, but this groove making method can reduce the strength of the tube body, and it is inconvenient to assemble.

(13) The lamp holder 2 comes in a tube shape construction that fits the tube body, and it comprises two sections, wherein the section with a large inner diameter is sleeved with the tube body, and it is limited by the step between the section with a smaller inner diameter. One end of the lamp holder 3 is enclosed, and a contact pin 22 in electric connection with the light bar 3 is provided at the enclosed end. In this embodiment, an integrated linkage 21 is provided between the two lamp holders 2 to enhance the strength of the tube.

(14) In the present invention, ultrasonic welding is adopted between the curved section 12 and the straight tube section 11, and between the two semicircle tubes of the curved section 12, through which not only the connection strength is improved, but also the technology is easy to realize.