TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of lighting devices, and in
particular to an LED pluggable lamp facilitating assembly and a processing method
thereof.
DESCRIPTION OF THE PRIOR ART
[0002] With the development of technology, LED lighting lamps are applied in various fields.
Due to convenience of installation and use, LED pluggable lamps are increasingly favored
by users. The existing LED pluggable lamp usually uses screws at both ends of the
tube body to connect the lamp head and the lamp tail, which makes assembly difficult
and requires the use of tools. The installation steps are cumbersome, the workshop
assembly efficiency is low, it is difficult to realize automation production, and
the screws are prone to damage, resulting in failure of the connection between the
tube body and the lamp head or lamp tail, causing quality problems.
SUMMARY OF THE DISCLOSURE
[0003] The LED pluggable lamp facilitating assembly provided here solves the problems that
the assembly of the LED pluggable lamp is cumbersome and inconvenient, and the connection
is prone to failure after assembly.
[0004] This disclosure discloses an LED pluggable lamp facilitating assembly, including:
a light-emitting component including a substrate and LED lamp beads arranged on the
substrate;
an integrally configured tube body including a first end and a second end, and having
a base portion for fixing the light-emitting component and a light-transmitting portion
opposing to the base portion;
a lamp head disposed at the first end and welded to an end surface of the first end,
the lamp head being provided with a plug and conductive elements for connecting to
an external power supply on a side of the lamp head facing away from the tube body;
a lamp tail disposed at the second end and welded to an end surface of the second
end; and
a drive power located in the lamp head and electrically connected to the conductive
elements and the light-emitting component.
[0005] In the following, several alternatives are provided, but merely as further additions
or preferences, instead of as additional limitations to the above-mentioned technical
solution. Without technical or logical contradiction, the alternatives can be combined
with the above-mentioned technical solution, individually or in combination.
[0006] Optionally, the lamp head further includes a shell, and a side of the shell facing
the tube body surrounds the first end of the tube body and the plug is located on
a side of the shell facing away from the tube body; and the plug is configured to
plug in and match with a socket, and an outer periphery of the plug is further provided
with a fastening snap for engaging with the socket.
[0007] Optionally, the shell has step structures located on two sides of the plug respectively,
and the conductive elements are two power connection posts which are located on two
sides of the plug respectively; and one end of each power connection post is a fixed
end connected to a corresponding step structure, the other end extends away from the
tube body, and the fixed end extends into an interior of the shell and is provided
with an engagement hole on an end surface thereof, and the drive power is provided
with leads, and an end of each lead is a rigid rod that is inserted into a corresponding
engagement hole.
[0008] Optionally, a plug connector is provided on the substrate and the plug connector
is provided with a jack, and the drive power is provided with a pin matching with
the jack, thereby realizing electrical connection between the drive power and the
light-emitting component through the pin.
[0009] Optionally, the tube body has an axial direction in space, and the first end and
the second end are located on two ends in the axial direction respectively; and an
insertion direction of the leads into the engagement holes and an insertion direction
of the pin into the jack are both in the axial direction.
[0010] Optionally, the tube body has opposite length and width directions in a cross section
thereof, the base portion and the light-emitting component are located on one side
in the width direction, and the light-transmitting portion of the tube body is located
on the other side in the width direction; and the drive power includes a circuit board
and a circuit element installed on a side of the circuit board in a thickness direction
of the circuit board, and the circuit element, the leads and the pin are all located
on the side of the circuit board facing the base portion.
[0011] Optionally, the shell is further connected to the tube body in a snap-fit manner:
a first snap is provided on an inner wall of the shell and the tube body is provided
with a first snap groove corresponding to the first snap.
[0012] Optionally, an inner wall of the shell is provided with a limiting portion abutting
against the tube body and welded with the end surface of the tube body, and the limiting
portion is a step surface extending in a circumferential direction of the shell.
[0013] Optionally, the lamp tail is configured as a cap, including a bottom plate and a
peripheral edge that extends in a circumferential direction of the bottom plate and
surrounds the tube body; and an inner wall of the peripheral edge is provided with
a second snap, and the second end is provided with a second snap groove that matches
the second snap so that the peripheral edge and the tube body are connected with each
other in a snap fit through the second snap and the second snap groove.
[0014] Optionally, the end surface of the tube body abuts the bottom plate, the bottom plate
is provided with a protrusion extending in the circumferential direction of the bottom
plate, and the protrusion is melted so that the lamp tail is welded with the tube
body.
[0015] This disclosure further provides a processing method for an LED pluggable lamp. The
LED pluggable lamp includes a tube body, a light-emitting component located in the
tube body, a lamp head and a lamp tail located at two ends of the tube body respectively,
and a drive power located in the lamp head. The processing method includes:
installing the light-emitting component into the tube body;
installing the drive power into the lamp head;
pre-positioning the lamp head and the lamp tail on the two ends of the tube body respectively,
during which, electrically connecting the drive power and the light-emitting component
by plugging; and
fixing the lamp head and the lamp tail to the two ends of the tube body respectively
by welding.
[0016] Optionally, the lamp head is provided with a plug and conductive elements for connecting
to an external power supply on a side of the lamp head facing away from the tube body,
and an end surface of an end of each conductive element extending into an interior
of the lamp head is provided with an engagement hole, and the step of installing the
drive power into the lamp head includes:
inserting and positioning the drive power into the lamp head in an axial direction
of the tube body; and
inserting leads of the drive power into corresponding engagement holes.
[0017] Optionally, the step of pre-positioning the lamp head and the lamp tail includes:
disposing the lamp head and the lamp tail respectively around the two ends of the
tube body in an axial direction of the tube body, and fitting the same with the tube
body by snapping.
[0018] Optionally, the light-emitting component includes a substrate and LED lamp beads
arranged on the substrate, a plug connector is provided on the substrate, the plug
connector is provided with a jack, and the drive power is provided with a pin that
matches the jack.
[0019] The step of electrically connecting the drive power and the light-emitting component
includes:
moving the tube body and the lamp head so that the jack and the pin are close to each
other until the pin is inserted into the jack in the axial direction of the tube body.
[0020] Optionally, the step of fixing the lamp head and the lamp tail to the two ends of
the tube body respectively by welding includes:
confirming that end surfaces of the two ends of the tube body are in contact with
the lamp head and the lamp tail respectively; and
applying energy to contact portions to change interface condition of the contact portions
until the contact portions are welded and fixed together.
[0021] In the LED pluggable lamp of the present disclosure, the lamp head and the lamp tail
are connected to the tube body by welding. The assembly process is simple and convenient,
which is conducive to automation production, and the connection is not prone to failure
after welding.
BRIEF DESCRIPTION OF DRAWINGS
[0022]
FIG. 1 is a schematic view of an LED pluggable lamp facilitating assembly according
to an embodiment of the present disclosure;
FIG. 2 is an exploded view of an LED pluggable lamp facilitating assembly according
to an embodiment of the present disclosure;
FIG. 3 is a cross-sectional view along the line of A-A in FIG. 1;
FIG. 4 is a cross-sectional view along the line of B-B in FIG. 1;
FIG. 5 is an enlarged view of portion M in FIG. 4;
FIG. 6 is an enlarged view of portion K in FIG. 4;
FIG. 7 is a cross-sectional view along the line of C-C in FIG. 1;
FIGS. 8 to 10 are schematic views of an LED pluggable lamp facilitating assembly according
to an embodiment of the present disclosure from different perspectives with part of
the tube body and part of the shell not shown; and
FIG. 11 is a schematic flow chart of a processing method according to an embodiment
of the present disclosure.
List of reference signs:
[0023]
10, light-emitting component; 11, substrate; 12, led lamp bead; 13, plug connector;
14, pin; 15, heat sink;
20, tube body; 21, first end; 22, second end; 23, base portion; 24, light-transmitting
portion; 25, slide groove; 26, inserting recess;
30, lamp head; 31, conductive element; 31a, engagement hole; 32, shell; 33, first
snap; 34, first snap groove; 35, limiting portion; 36, convex rib; 37, plug; 38, fastening
snap;
40, lamp tail; 41, bottom plate; 42, peripheral edge; 43, second snap; 44, second
snap groove; 45, protrusion; 50, drive power; 51, lead.
DDESCRIPTION OF EMBODIMENTS
[0024] The technical solutions according to the embodiments of the present disclosure will
be described clearly and fully in combination with the drawings according to the embodiments
of the present disclosure. Obviously, the described embodiments are not all embodiments
of the present disclosure, but only part of the embodiments of the present disclosure.
Based on the disclosed embodiments, all other embodiments obtained by those skilled
in the art without creative work fall into the scope of this specification.
[0025] It should be noted that, when a component is "connected" with another component,
it may be directly connected to another component or may be indirectly connected to
another component through a further component. When a component is "provided" on another
component, it may be directly provided on another component or may be provided on
another component through a further component.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the
same meaning as commonly understood by a person skilled in the art. The terms in the
description of the present disclosure are used to describe specific embodiments, and
not to limit the present disclosure. The term "and/or" used herein includes one or
more of the listed options in any combinations, or the combination of all of the listed
options.
[0027] As shown in FIGS. 1 to 2, the present disclosure discloses an LED pluggable lamp
facilitating assembly, including a light-emitting component 10, an integrally configured
tube body 20, a lamp head 30, a lamp tail 40 and a drive power 50. The light-emitting
component 10 includes a substrate 11 and LED lamp beads 12 arranged on the substrate
11. The integrally configured tube body 20 includes a first end 21 and a second end
22, and has a base portion 23 for fixing the light-emitting component 10 and a light-transmitting
portion 24 opposing to the base portion 23. FIG. 7 shows that the cross-section of
the tube body 20 has opposite length and width directions. For example, the horizontal
direction as shown in FIG. 7 is the width direction, and the base portion 23 and the
light-emitting component 10 are located on one side in the width direction and the
light-transmitting portion 24 of the tube body 20 is located on the other side in
the width direction.
[0028] The light emission of the LED lamp beads 12 is directed toward the light-transmitting
portion 24. Nonetheless, the base portion 23 and the light-transmitting portion 24
are not strictly divided regarding the distribution thereof or distinguished regarding
the material thereof. For example, all portions of the integrally configured tube
body 20 can be made of a light-transmitting material.
[0029] The lamp head 30 includes a shell 32. The lamp head 30 is provided with a plug 37
on the side facing away from the tube body 20, and conductive elements 31 for external
power supply. The lamp head 30 is arranged at the first end 21, and the side of the
shell 32 facing the tube body 20 surrounds the first end 21 and is welded with the
end surface of the first end 21. The plug 37 is used to plug in and match an external
socket, and the outer periphery of the plug 37 is further provided with a fastening
snap 38 for engaging with the socket. Further, the socket is electrically connected
to the conductive elements 31 to provide power to the LED lamp beads 12.
[0030] The lamp tail 40 is arranged on the second end 22 and is welded with the end surface
of the second end 22. The drive power 50 is electrically connected to the conductive
elements 31 and the light-emitting component 10.
[0031] The end surface of the first end 21 of the tube body 20 is welded with the lamp head
30, and the end surface of the second end 22 of the tube body 20 is welded with the
lamp tail 40, facilitating the assembly of the LED pluggable lamp and mechanical automation
production, so that the lamp head 30 and the lamp tail 40 would not be easily separated
from the tube body 20 after welding. Welding can also provide better sealing.
[0032] In some embodiments, as shown in FIGS. 3 to 6, the opening of the shell 32 surrounds
the tube body 20, and the inner wall of the shell 32 is provided with a first snap
33. The tube body 20 surrounded by the shell 32 is provided with a first snap groove
34. The shell 32 and the tube body 20 are in a snap fit. A plurality of first snap
grooves 34 can be provided. For example, both sides of the tube body 20 in the width
direction of the cross section thereof can each be provided with one or two first
snap grooves 34, and both sides in the length direction of the cross section can each
be provided with one first snap groove 34. Accordingly, the first snaps 33 match with
the first snap grooves 34 regarding the position and number thereof.
[0033] The inner wall of the shell 32 is further provided with a limiting portion 35 that
abuts the tube body 20. The limiting portion 35 is a step surface extending along
the circumferential direction of the shell 32. The limiting portion 35 is welded with
the tube body 20 after ultrasonic treatment.
[0034] In some embodiments, as shown in FIGS. 2 to 4, the inner wall of the shell 32 is
provided with convex ribs 36 extending in the axial direction of the shell 32. The
convex ribs 36 and the inner wall of the shell 32 clamp and fix the drive power 50
in the shell 32.
[0035] Referring to FIGS. 8 to 10, the shell 32 has step structures on both sides of the
plug 37. The conductive elements 31 are two power connection posts, which are respectively
located on two sides of the plug 37. One end of the power connection post is a fixed
end connected to the corresponding step structure and the other end extends away from
the tube body 20. The fixed end also extends into the interior of the shell 32, and
is provided with an engagement hole 31a on the end surface. The drive power 50 located
in the lamp head 30 is provided with leads 51. The end of the lead 51 is a rigid rod
that is inserted into the corresponding engagement hole 31a. That is, the lead 51
at one end of the drive power 50 is inserted into the interior of the conductive element
31 and connected to the external power supply.
[0036] The substrate 11 of the light-emitting component 10 is provided with a plug connector
13. The plug connector 13 is provided with jacks. The other end of the drive power
50 is provided with pins 14 that match the plug connector 13 to realize electrical
connection between the drive power 50 and the light-emitting component 10. The drive
power 50 is electrically connected to the external power supply and the light-emitting
component 10 in a plug-in manner, which is more convenient to assemble than the traditional
welding method.
[0037] The pins 14 include two pins arranged side by side, each of which is roughly L-shaped
and extends from the circuit board of the drive power 50 in the thickness direction
of the circuit board and then bends toward the light-emitting component 10 until engaging
with the plug connector 13.
[0038] The tube body 20 has an axial direction in space, and the insertion direction of
the lead 51 into the engagement hole 31a as well as the insertion direction of the
pin 14 into the jack are both in the axial direction. Therefore, when assembling the
tube body 20 and the lamp head 30, the pins 14 and the plug connector 13 are also
connected simultaneously.
[0039] The drive power 50 includes a circuit board and circuit elements installed on one
side of the circuit board in the thickness direction. The circuit elements, leads
51 and pins 14 are all located on the side of the circuit board facing the base portion
23. In some embodiments, as shown in FIG. 7, the light-emitting component 10 is further
provided with a heat sink 15, the base portion 23 of the tube body 20 is provided
with a slide groove 25, and the heat sink 15 is installed in the slide groove 25.
The heat sink 15 is provided with an inserting recess 26 in the middle, and the substrate
11 is inserted therein in the heat sink 15 to dissipate heat for the light-emitting
component 10 during use.
[0040] The base portion 23 of the tube body 20 and the light-emitting component 10 are located
on one side of the tube body 20 in the width direction of the cross section thereof,
and the light-transmitting portion 24 of the tube body 20 is located on the other
side in the width direction.
[0041] In some embodiments, the lamp tail 40 is a configured as a cap, including a bottom
plate 41 and a peripheral edge 42 that surrounds the tube body 20. The inner wall
of the peripheral edge 42 is provided with a second snap 43, the second end 22 is
provided with a second snap groove 44, and the lamp tail 40 and the tube body 20 are
in a snap fit. The end surface of the tube body 20 abuts against the bottom plate
41. The bottom plate 41 is provided with a protrusion 45 extending in the circumferential
direction of the bottom plate. After ultrasonic treatment, the protrusion 45 melts
so that the lamp tail 40 is welded with the tube body 20. A plurality of second snap
grooves 44 can be provided. For example, reference may be made to the arrangement
of the first snap grooves 34, and the same applies to the second snap grooves 43.
[0042] Referring to FIG. 11, an embodiment of the present disclosure further provides a
processing method for an LED pluggable lamp. The LED pluggable lamp can be the LED
pluggable lamp according to the above embodiments. For example, the LED pluggable
lamp includes the tube body 20, the light-emitting component 10 in the tube body 20,
the lamp head 30 and the lamp tail 40 located at two ends of the tube body 20, respectively,
and the drive power 50 located in the lamp head 30. The processing method in this
embodiment includes:
installing the light-emitting component 10 into the tube body 20; and
installing the drive power 50 into the lamp head 30, wherein the lamp head 30 is provided
with the plug 37 on the side facing away from the tube body 20 and the conductive
elements 31 for connecting the external power supply; the conductive element 31 can
be fixed to the lamp head in advance and the end surface of the conductive element
31 that extends into the interior of the lamp head 30 is provided with an engagement
hole 31a; during installation, the drive power 50 is inserted and positioned into
the lamp head 30 in the axial direction of the tube body and the leads 51 of the drive
power 50 are inserted into the corresponding engagement holes 31a simultaneously.
[0043] The conductive element 31 generally has a tubular structure. After the lead 51 is
inserted into the conductive element 31, it extends out of the side of the conductive
element 31 facing away from the tube body 20. Then, a radial clamping force can be
applied to the conductive element 31, so that the conductive element 31 is partially
deformed to fasten the lead 51, and the excess section of the lead 51 extending out
can be cut off.
[0044] The lamp head 30 (together with the drive power 50) and the lamp tail 40 are pre-positioned
at two ends of the tube body 20 respectively. During pre-positioning, the lamp head
30 and the lamp tail 40 respectively surround two ends of the tube body 20 in the
axial direction of the tube body 20 for pre-positioning, and after that, they are
engaged with the tube body 20 respectively by means of snap fit (via the first snaps
33 and the first snap grooves 34, and the second snaps 43 and the second snap grooves
44), and the drive power 50 and the light-emitting component 10 are electrically connected
in a plug-in manner.
[0045] The light-emitting component 10 includes a substrate 11 and LED lamp beads 12 arranged
on the substrate 11. The substrate 11 is provided with a plug connector 13. The plug
connector 13 is provided with jacks. The drive power 50 is provided with pins 14 that
match the jacks. For a circuit connection, the jacks and the pins 14 approach each
other as the tube body 20 and the lamp head 30 approach each other until they are
inserted one in the other in the axial direction of the tube body 20. The jack penetrates
the plug connector 13 to adapt to different insertion depths of the pin 14.
[0046] The lamp head 30 and the lamp tail 40 are fixedly connected to the two ends of the
tube body 20 by welding. Specifically, it is confirmed that the two end surfaces of
the tube body 20 are in contact with the lamp head 30 and the lamp tail 40, respectively;
energy is applied to the contact portions, for example by ultrasonic method, etc.,
so that the interface condition of the contact portions can be changed after applying
energy until the contact portions are welded and fixed together.
[0047] The technical features of the above embodiments can be arbitrarily combined, and
not all possible combinations of the technical features of the above embodiments have
been described for the sake of brevity of description. However, as long as there is
no contradiction in the combination of these technical characteristics, such combination
should be regarded as falling into the scope of this specification. When the technical
features in different embodiments are shown in the same figure, it can be considered
that the figure also discloses a combined embodiment of various embodiments involved.
[0048] The above-described embodiments only illustrate several embodiments of the present
disclosure, and the description thereof is specific and detail, but should not be
construed as limiting the scope of the patent disclosure. It should be noted that,
for those of ordinary skill in the art, several modifications and improvements can
be made without departing from the concept of the present disclosure, all of which
fall into the protection scope of the present disclosure. Therefore, the protection
scope of the present disclosure should refer to the appended claims.
1. An LED pluggable lamp facilitating assembly, comprising:
a light-emitting component comprising a substrate and LED lamp beads arranged on the
substrate;
an integrally configured tube body comprising a first end and a second end, and having
a base portion for fixing the light-emitting component and a light-transmitting portion
opposing to the base portion;
a lamp head disposed at the first end and welded to an end surface of the first end,
the lamp head being provided with a plug and conductive elements for connecting to
an external power supply on a side of the lamp head facing away from the tube body;
a lamp tail disposed at the second end and welded to an end surface of the second
end; and
a drive power located in the lamp head and electrically connected to the conductive
elements and the light-emitting component.
2. The LED pluggable lamp facilitating assembly according to claim 1, wherein the lamp
head further comprises a shell, and a side of the shell facing the tube body surrounds
the first end of the tube body and the plug is located on a side of the shell facing
away from the tube body; and
the plug is configured to plug in and match with a socket, and an outer periphery
of the plug is further provided with a fastening snap for engaging with the socket.
3. The LED pluggable lamp facilitating assembly according to claim 2, wherein the shell
has step structures located on two sides of the plug respectively, and the conductive
elements are two power connection posts which are located on two sides of the plug
respectively; and
wherein one end of each power connection post is a fixed end connected to a corresponding
step structure, the other end extends away from the tube body, and the fixed end extends
into an interior of the shell and is provided with an engagement hole on an end surface
thereof, and wherein the drive power is provided with leads, and an end of each lead
is a rigid rod that is inserted into a corresponding engagement hole.
4. The LED pluggable lamp facilitating assembly according to claim 3, wherein a plug
connector is provided on the substrate and the plug connector is provided with a jack,
and the drive power is provided with a pin matching with the jack, thereby realizing
electrical connection between the drive power and the light-emitting component through
the pin.
5. The LED pluggable lamp facilitating assembly according to claim 4, wherein the tube
body has an axial direction in space, and the first end and the second end are located
on two ends in the axial direction respectively; and
an insertion direction of the leads into the engagement holes and an insertion direction
of the pin into the jack are both in the axial direction.
6. The LED pluggable lamp facilitating assembly according to claim 5, wherein the tube
body has opposite length and width directions in a cross section thereof, the base
portion and the light-emitting component are located on one side in the width direction,
and the light-transmitting portion of the tube body is located on the other side in
the width direction; and
the drive power comprises a circuit board and a circuit element installed on a side
of the circuit board in a thickness direction of the circuit board, and the circuit
element, the leads and the pin are all located on the side of the circuit board facing
the base portion.
7. The LED pluggable lamp facilitating assembly according to claim 2, wherein the shell
is further connected to the tube body in a snap-fit manner, and wherein a first snap
is provided on an inner wall of the shell and the tube body is provided with a first
snap groove corresponding to the first snap.
8. The LED pluggable lamp facilitating assembly according to claim 2, wherein an inner
wall of the shell is provided with a limiting portion abutting against the tube body
and welded with the end surface of the tube body, and the limiting portion is a step
surface extending in a circumferential direction of the shell.
9. The LED pluggable lamp facilitating assembly according to claim 1, wherein the lamp
tail is configured as a cap, comprising a bottom plate and a peripheral edge that
extends in a circumferential direction of the bottom plate and surrounds the tube
body; and
an inner wall of the peripheral edge is provided with a second snap, and the second
end is provided with a second snap groove that matches the second snap so that the
peripheral edge and the tube body are connected with each other in a snap fit through
the second snap and the second snap groove.
10. The LED pluggable lamp facilitating assembly according to claim 9, wherein the end
surface of the tube body abuts the bottom plate, the bottom plate is provided with
a protrusion extending in the circumferential direction of the bottom plate, and the
protrusion is melted so that the lamp tail is welded with the tube body.
11. A processing method for an LED pluggable lamp, wherein the LED pluggable lamp comprises
a tube body, a light-emitting component located in the tube body, a lamp head and
a lamp tail located at two ends of the tube body respectively, and a drive power located
in the lamp head, and the processing methods comprises steps of:
installing the light-emitting component into the tube body;
installing the drive power into the lamp head;
pre-positioning the lamp head and the lamp tail on the two ends of the tube body respectively,
during which, electrically connecting the drive power and the light-emitting component
by plugging; and
fixing the lamp head and the lamp tail to the two ends of the tube body respectively
by welding.
12. The processing method for the LED pluggable lamp according to claim 11, wherein the
lamp head is provided with a plug and conductive elements for connecting to an external
power supply on a side of the lamp head facing away from the tube body, and an end
surface of an end of each conductive element extending into an interior of the lamp
head is provided with an engagement hole, and wherein the step of installing the drive
power into the lamp head comprises:
inserting and positioning the drive power into the lamp head in an axial direction
of the tube body; and
inserting leads of the drive power into corresponding engagement holes.
13. The processing method for the LED pluggable lamp according to claim 11, wherein the
step of pre-positioning the lamp head and the lamp tail comprises:
disposing the lamp head and the lamp tail respectively around the two ends of the
tube body in an axial direction of the tube body, and fitting the same with the tube
body by snapping.
14. The processing method for the LED pluggable lamp according to claim 13, wherein the
light-emitting component comprises a substrate and LED lamp beads arranged on the
substrate, a plug connector is provided on the substrate, the plug connector is provided
with a jack, and the drive power is provided with a pin that matches the jack; and
the step of electrically connecting the drive power and the light-emitting component
comprises:
moving the tube body and the lamp head so that the jack and the pin are close to each
other until the pin is inserted into the jack in the axial direction of the tube body.
15. The processing method for the LED pluggable lamp according to claim 11, wherein the
step of fixing the lamp head and the lamp tail to the two ends of the tube body respectively
by welding comprises:
confirming that end surfaces of the two ends of the tube body are in contact with
the lamp head and the lamp tail respectively; and
applying energy to contact portions to change interface condition of the contact portions
until the contact portions are welded and fixed together.