JP2013122826A - Led illumination lamp equipped with rotation position fixing part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED illumination lamp that is hard to generate human errors at assembling by facilitating positioning in a rotation direction and having good workability.SOLUTION: In the straight-tube type LED illumination lamp 10 having an LED board 11 with a plurality of LEDs 12, a cylindrical cover 20 for covering the LED board 11, and sockets 30 covered on either end of the cover 20, the cover 20 has a support member 21 for supporting the LED board 11 in a downward direction, and a light diffusing cover 25 fixed at a lower side of the support member 21. The support member 21 and the light diffusing cover 25 are joined to each other to form a cylindrical shape, and form a difference 20a in level at a cylindrical end face as one of them is formed longer than the other. The socket 30 has an engagement part 30a formed on a butting face of the cover 20 to be engaged with the level difference 20a.

Description

  The present invention relates to a straight tube type LED lamp, and more particularly to an LED lamp that can be easily positioned in the rotational direction during assembly.

  In recent years, LED illumination lamps that are structurally compatible with existing fluorescent lamps have been proposed (see, for example, Patent Document 1).

  Such an LED illuminating lamp includes a cylindrical main body portion and socket portions provided on both sides of the main body portion, and the outer shape is the same as that of a conventional fluorescent lamp.

JP 2011-210729 A

  When assembling the LED lighting as described above, the LED board is accommodated in the main body portion, and the socket is fitted and bonded. At this time, since it is necessary to position the LED board so that the LED mounting surface of the LED substrate is on the lower surface side, for example, a mark is provided on the side surface of the socket to position in the rotational direction.

  However, if the visual positioning is performed in this way, there is a concern that a human error may occur and the workability is poor. In particular, when the angle of the irradiation direction is deviated, the normal illumination distribution characteristics cannot be obtained and the LED becomes fatal as an illumination light source. Therefore, it is necessary to accurately position the rotation direction, and the accuracy and ease of positioning Was strongly sought after.

  Then, this invention makes it a subject to provide the LED illuminating lamp which makes it easy to perform the positioning of a rotation direction, and is hard to generate | occur | produce an artificial mistake at the time of an assembly, and is also excellent in workability | operativity.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

(Claim 1)
The invention described in claim 1 is characterized by the following points.

  That is, the LED illumination lamp according to claim 1 includes an LED substrate on which a plurality of LEDs are arranged, a cylindrical cover that covers the LED substrate, and sockets that are attached to both ends of the cover. A straight tube type LED illumination lamp, wherein the cover includes a support member that supports the LED substrate downward, and a light diffusion cover that is fixed to the lower side of the support member. And the light diffusion cover are joined to each other to form a cylindrical shape, one of which is longer than the other to form a step on the cylindrical end surface, and the socket An engaging portion that engages with the step is formed on the abutting surface.

(Claim 2)
The invention described in claim 2 has the following features in addition to the features of the invention described in claim 1 described above.

  That is, the support member is formed shorter than the light diffusion cover.

  The present invention is as described above, and the support member and the light diffusion cover are joined to each other to form a cylindrical shape, and one is formed longer than the other to form a step on the end surface of the cylindrical shape. In the socket, an engagement portion that engages with the step is formed on the contact surface of the cover. For this reason, when the socket is put on the cover composed of the support member and the light diffusion cover, the gap is engaged with the engaging portion and positioning in the rotational direction is performed, so positioning is performed accurately and easily. be able to. As a result, it is possible to provide an LED illumination lamp that is less prone to human error during assembly and has good workability.

  At this time, it is desirable to form the support member shorter than the light diffusion cover. In other words, the support member is usually made of a metal such as aluminum that also serves as a heat sink, so if this support member is formed short and applied to the socket, it is made of a material (metal) with a small tolerance. Dimensioning can be performed with the support member.

It is the side view which abbreviate | omitted (a) front view and (b) intermediate part of LED lighting. It is the partially expanded exploded view which looked at the LED illumination light from the top. It is the partially expanded exploded view which looked at the LED illumination light from the bottom. It is AA sectional drawing of a LED illumination lamp. It is a side view of a cover. It is a perspective view of the cylinder member of a socket. It is a rear view of the cylinder member of a socket. It is BB sectional drawing of the cylindrical member of a socket.

  The LED illumination lamp 10 according to the present embodiment is a straight tube illumination lamp that is structurally compatible with a conventional fluorescent lamp, and can be connected to a conventional lamp body for a fluorescent lamp.

  The LED illumination lamp 10 includes an LED board 11 on which a plurality of LEDs 12 are arranged, a control board 40 that controls power supply to the LED board 11, and a cylindrical cover 20 that covers the LED board 11 and the control board 40. , And sockets 30 attached to both ends of the cover 20. As in the case of a conventional fluorescent lamp, the LED illumination lamp 10 is lit when power is supplied through the connection portion with the sockets 30 at both ends attached to the connection portion of the lamp body.

(LED board 11)
The LED substrate 11 is a base on which a plurality of LEDs 12 are mounted on the surface. A capacitor 13 that stores electricity to be supplied to the LED 12 is also mounted on the LED substrate 11.

(Control board 40)
The control board 40 is a board on which transistors and the like for switching on and off the plurality of LEDs 12 on the LED board 11 are mounted. Although not particularly illustrated, the control board 40 includes a control circuit for controlling power supplied from the outside, and supplies power to the LED board 11 via the control circuit.

(Cover 20)
The cover 20 includes a heat radiating pipe 21 as a support member that supports the LED substrate 11 downward, and a light diffusion cover 25 fixed to the lower side of the heat radiating pipe 21. The cover 20 forms a cylindrical shape as a whole when the light diffusion cover 25 and the heat radiating pipe 21 are joined.

(Heat dissipation pipe 21)
The heat radiating pipe 21 is an extruded mold member made of aluminum, and includes a substantially half-moon shaped pipe portion 21a and a hanging portion 21b integrally extending below the pipe portion 21a. The heat radiating pipe 21 is attached so that the LED board 11 and the control board 40 are in surface contact with each other, and serves as a heat sink for radiating the heat of the board.

  The substantially half-moon shaped pipe portion 21a has a hollow inside, and the control board 40 can be slid into the hollow inside.

  The hanging part 21b protrudes downward from the flat surface of the pipe part 21a and is formed in parallel on both sides over the entire length of the cover 20 in the longitudinal direction. Nipping grooves 21c are formed at opposing positions on the inner side surfaces of the two hanging portions 21b. By inserting and sliding the LED board 11 into the holding grooves 21c, the mounting surface of the LED 12 is lowered below. The LED substrate 11 can be held so as to face. An outer groove 21d is formed on the outer surface of the two hanging parts 21b, and the light diffusion cover 25 can be attached by the outer groove 21d.

(Light diffusion cover 25)
The light diffusion cover 25 is a resin-made extruded mold formed in a substantially C shape. The light diffusion cover 25 as a whole constitutes a light-transmitting light transmitting portion 25b, and is formed so as to emit light emitted from the LED 12 downward and laterally.

  The open end portions on both sides of the light diffusing cover 25 protrude inward in a bowl shape, and form an engaging claw portion 25a. The light diffusing cover 25 can be attached to the heat radiating pipe 21 by inserting the engaging claw portion 25a into the outer groove 21d of the heat radiating pipe 21 described above. When the light diffusing cover 25 is attached to the heat radiating pipe 21, the engaging claws 25a on both sides are pushed away in the direction away from each other by using the elasticity of the light diffusing cover 25 and inserted into the outer groove 21d. Thereby, the engagement claw portions 25a on both sides sandwich the outer groove 21d from the outside, and the light diffusion cover 25 and the heat radiating pipe 21 are joined to each other.

(Socket 30)
The socket 30 is a bottomed cylindrical member that is attached to both ends of the cover 20, and includes a resin tubular member 31 and an electrode cap 32 that is attached to an end of the tubular member 31. .

  The cylindrical member 31 is formed in a cylindrical shape in order to be covered on the outer periphery of the end portion of the cover 20. As shown in FIGS. 7 and 8, two engaging protrusions 30 a (engaging portions) are provided on the inner peripheral edge of the bottom portion of the cylindrical member 31, that is, the contact surface of the cover 20.

  The electrode cap 32 is a metal member having two pins 32a protruding therefrom. The LED illuminating lamp 10 is mounted on the lamp body by inserting and connecting the pin 32a of the electrode cap 32 to the connection portion of the lamp body, and the weight of the LED illumination lamp 10 can be supported by the pin 32a.

(About fitting of the cover 20 and the socket 30)
As described above, the cover 20 is formed by joining the heat radiating pipe 21 and the light diffusing cover 25, but the heat radiating pipe 21 and the light diffusing cover 25 are formed to have different lengths. In the present embodiment, the heat radiating pipe 21 is formed to be shorter than the light diffusion cover 25 by about 6 mm. For this reason, when the heat radiating pipe 21 and the light diffusion cover 25 are joined, a step 20a of 3 mm is formed on each end face of the cylindrical cover 20 (see FIG. 5).

  Further, as described above, the cylindrical member 31 constituting the socket 30 has the two engaging protrusions 30 a formed on the contact surface of the cover 20. The engagement protrusion 30a is set larger than the above-described step 20a (that is, 3 mm or more) (see FIG. 8). The two engaging protrusions 30a are formed apart from each other at a position where an angle R1 (see FIG. 7) viewed from the center is about 110 degrees, and this angle R1 is an angle R2 (see FIG. 4)).

  With the configuration described above, when the cover 20 is inserted into the socket 30 and rotated while pressing the cover 20 in the depth direction of the socket 30, the engagement protrusion 30a engages with the step 20a at a predetermined position. Positioning in the rotational direction of 20 can be performed.

  When the LED illuminating lamp 10 is positioned by engaging the engaging protrusion 30a with the step 20a in this way, the LED 12 mounting surface of the LED substrate 11 faces directly below (when the heat radiating pipe 21 is directly above). And the light diffusing cover 25 is disposed immediately below), and the irradiation direction of the LED 12 can be set to the correct direction.

(Summary)
The present embodiment is as described above, and the heat radiating pipe 21 and the light diffusion cover 25 are joined to each other to form a cylindrical shape, and one is formed longer than the other, whereby a step 20a is formed on the cylindrical end surface. The socket 30 has an engagement projection 30a that engages with the step 20a on the contact surface of the cover 20. For this reason, when the socket 30 is put on the cover 20 composed of the heat radiating pipe 21 and the light diffusion cover 25, the step 20a is engaged with the engagement protrusion 30a and positioning in the rotational direction is performed. Positioning can be performed easily. As a result, it is possible to provide the LED illumination lamp 10 that is less prone to human error during assembly and has good workability.

  In addition, since the metal heat radiating pipe 21 is formed shorter than the light diffusion cover 25 and the heat radiating pipe 21 abuts against the engaging protrusion 30a and the entire dimension is determined, a material with a small tolerance (metal ) Can be dimensioned with the heat radiating pipe 21 formed in step (1).

10 LED lighting 11 LED substrate 12 LED
13 Capacitor 20 Cover 20a Step 21 Radiating pipe (supporting member)
21a Pipe part 21b Hanging part 21c Nipping groove 21d Outer groove 25 Light diffusion cover 25a Engaging claw part 25b Light transmitting part 30 Socket 30a Engaging protrusion (engaging part)
31 cylinder member 32 electrode cap 32a pin 40 control board

Claims (2)

An LED substrate on which a plurality of LEDs are disposed;
A cylindrical cover that covers the LED substrate;
Sockets attached to both ends of the cover;
A straight tube type LED lighting with
The cover includes a support member that supports the LED substrate downward, and a light diffusion cover that is fixed to the lower side of the support member.
The support member and the light diffusion cover are joined to each other to form a cylindrical shape, and one is formed longer than the other, thereby forming a step on the end surface of the cylindrical shape,
The LED illumination lamp according to claim 1, wherein the socket is formed with an engaging portion that engages with the step on a contact surface of the cover.   The LED illumination lamp according to claim 1, wherein the support member is formed shorter than the light diffusion cover.

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