JP2015026430A - Fixing structure of front cover and lamp using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure of a front cover, which can simply and surely fix the front cover on an aperture of a recess in a lamp body by using a front cover fixing member formed independently of the front cover.SOLUTION: The fixing structure of the front cover is comprised of: a light-emitting body 11; a lamp body 12 having a recess 20 to which the light-emitting body 11 is attached; a translucent front cover 16 arranged so as to cover an aperture 20b of the recess 20; and a front cover fixing member 18 for fixing the front cover 16. A first screw 72 is formed on an inner surface of an aperture end portion of the recess 20 in the lamp body 12, a second screw 82 to be threadedly engaged with the first screw 72 is formed outward on the front cover fixing member 18 and the front cover 16 is fixed between the front cover fixing member 18 and the lamp body 12 by threadedly engaging the second screw 82 with the first screw 72.

Description

  The present invention relates to a fixing structure of a front cover used for a lamp using a light emitter represented by a light emitting diode, and a lamp using the same.

  Compared to conventional incandescent bulbs (including halogen lamps), light-emitting diodes (hereinafter referred to as “LEDs”), which have lower power consumption and longer life, are becoming more energy-saving measures as consumers become more eco-conscious. For example, the range of use is rapidly widening, and there is an increasing need to use a lamp using an LED as an alternative to an incandescent bulb.

  Generally, in this type of lamp, an LED is mounted in a recess formed in the lamp body, and a light-transmitting front cover is provided so as to cover the recess so that the LED is directly touched. Or dust or water droplets are prevented from entering the recess.

  Since the front cover that requires translucency is generally made of resin such as polycarbonate, acrylic, or glass, the front cover can be screwed directly into the recess in the lamp body or screwed in. It is difficult to do. For this reason, it is common to use a ring-shaped front cover fixing member having an opening having substantially the same diameter as the opening of the recess, and fix the front cover so as to be sandwiched between the front cover fixing member and the lamp body. is there.

JP2012-124110A

  However, the conventional front cover fixing structure has a problem. In other words, in the conventional structure, the front cover fixing member is screwed to the opening edge of the recess of the lamp body using a plurality of (for example, 3 to 4) screws. In order to ensure the sealing of the recess of the main body, it was necessary to equalize the tightening strength of each screw, and it took time to install the front cover and the front cover fixing member, and skill in the mounting technique was required. .

  In order to avoid such a problem, Patent Document 1 discloses a technique using a “cover member” configured by integrally attaching a front cover to a central portion of a front cover fixing member. In the technique disclosed in Patent Document 1, screw portions are respectively formed on the outer surface of the front end of the lamp body and the inner surface of the peripheral edge of the cover member. The cover member is attached to the lamp body by covering the opening of the recess in the lamp body and screwing the tip of the lamp body into the cover member.

  However, the technique disclosed in Patent Document 1 causes another problem that a cover member in which a front cover and a front cover fixing member, which are made of different materials, are integrally formed must be prepared. For this reason, development of a technique capable of drastically solving the problem has been demanded.

  The present invention has been developed in view of such problems of the prior art. Therefore, the main problem of the present invention is that the front cover can be easily and reliably fixed to the opening of the recess in the lamp body using the front cover fixing member formed separately from the front cover. And a lamp using the same.

The invention described in claim 1 includes a light emitter, a lamp body having a recess to which the light emitter is attached, a translucent front cover disposed so as to cover an opening of the recess, and the front cover. And a front cover fixing member for fixing
A first screw is formed on the inner surface of the opening end of the recess in the lamp body, and a second screw that is screwed with the first screw is formed outwardly on the front cover fixing member.
This is a front cover fixing structure that fixes the front cover between the front cover fixing member and the lamp body by screwing the second screw into the first screw.

The invention described in claim 2 relates to an improvement in the fixing structure of the front cover according to claim 1,
In addition to having an O-ring,
The front cover fixing member further includes a pressing portion that presses the front cover toward the lamp body on the center side of the second screw.
An O-ring groove to which an O-ring is attached is formed on the peripheral edge of the opening of the recess in the lamp body.
The O-ring is deformed by the front cover pressed by the pressing portion, whereby the space between the front cover and the lamp body is sealed.

The invention described in claim 3 relates to an improvement in the fixing structure of the front cover according to claim 1 or 2,
It further includes a cover placed on the surface of the recess where the light emitter is attached,
The front cover has a plurality of legs extending from the surface facing the recess of the lamp body toward the recess,
On the peripheral edge of the cover facing the leg, a taper surface is formed that moves away from the surface facing the recess of the front cover as it goes to the peripheral edge.
The length of the leg is set to be longer than the distance from the base of the leg to the taper surface along the direction in which the leg extends when the front cover is fixed by the front cover fixing member. It is characterized by being.

  The invention described in claim 4 is a lamp to which the fixing structure of the front cover according to any one of claims 1 to 3 is applied.

  According to the front cover fixing structure to which the present invention is applied, the second screw of the front cover fixing member formed separately from the front cover is replaced with the first screw formed at the opening end of the recess in the lamp body. Thus, the front cover was pressed evenly with the front cover fixing member and fixed to the lamp body easily and reliably.

It is a front view of the lamp | ramp concerning an Example. It is a rear view of the lamp | ramp concerning an Example. It is a top view of the lamp | ramp concerning an Example. It is a bottom view of the lamp | ramp concerning an Example. It is a left view of the lamp | ramp concerning an Example. It is a right view of the lamp | ramp concerning an Example. It is a disassembled perspective view of the lamp | ramp (with a reflector) which concerns on an Example. It is a disassembled perspective view of the lamp | ramp which concerns on an Example. It is an exploded sectional view of a lamp (without a reflector) concerning an example. It is a perspective view which shows the other Example of the leg part extended from a front cover. It is sectional drawing which shows the assembly procedure of the lamp | ramp which concerns on an Example. It is sectional drawing which shows the assembly procedure of the lamp | ramp which concerns on an Example. It is sectional drawing which shows the assembly procedure of the lamp | ramp which concerns on an Example.

  Hereinafter, embodiments of the lamp 10 to which the present invention is applied will be described with reference to the drawings. As shown in FIGS. 1 to 9 (particularly FIGS. 7 to 9), the lamp 10 is roughly composed of a light emitter 11, a lamp body 12, a cover 14, a front cover 16, and a front cover fixing member 18. It consists of

  The light emitter 11 emits predetermined light by receiving electric power, and a plurality of LEDs are used in this embodiment. Of course, the light emitter 11 is not limited to an LED, and an organic EL (Electroluminescence), an incandescent lamp, or a high-pressure discharge lamp can also be used.

  The lamp body 12 includes a main body 19, a recess 20, a plurality of fins 22 formed on the opposite side of the recess 20, a socket 24 protruding from the center of the fin 22, a base 26, and the like. It consists of

  The main body 19 is a substantially disk-shaped member made of a metal having good thermal conductivity such as aluminum, and a socket insertion pipe 32 into which the socket 24 is inserted protrudes from one surface 19a of the disk. Has been. The open end 32a of the socket insertion pipe 32 and the other surface 19b of the main body 19 communicate with each other.

  The recess 20 is formed in the other surface 19b of the main body 19, and a plurality of light emitters 11 are mounted on the bottom surface 20a. Specifically, the embodiment of the present embodiment will be described. A light emitter mounting plate 28 having a conductive circuit (not shown) and a plurality of light emitters 11 mounted on the surface thereof is attached to the bottom surface 20a of the recess 20 with screws 30. In this way, the light emitter 11 is mounted on the bottom surface 20a of the recess 20. Note that silicon grease (not shown) for improving the thermal conductivity from the light emitter mounting plate 28 to the lamp body 12 is applied between the light emitter mounting plate 28 and the bottom surface 20a. Of course, the conductive circuit and the light emitter 11 may be directly mounted on the bottom surface 20a.

  As shown in FIG. 9, the opening end 20 c of the recess 20 is formed with a flange 70, a first screw 72 formed on the inner surface facing inward, and a front cover receiving portion 74 in order from the peripheral end to the inner side. In addition, an O-ring groove 76 for attaching the O-ring 42 is formed at a substantially central portion of the front cover receiving portion 74. Note that the shape shown in FIG. 9 is one example, and other shapes may be adopted. Further, the flange 70 may be omitted. Further, the O-ring 42 can be omitted, and when the O-ring 42 is omitted, the O-ring groove 76 is not necessary.

  The fin 22 is a plate-like body formed so as to surround the socket insertion pipe 32 on the one surface 19a of the main body 19, and in this embodiment, the main body 19 and the fin 22 are formed by die casting. It is integrally formed. Of course, after the main body 19 and the fins 22 are formed separately, the main body 19 and the fins 22 may be joined using means such as welding or adhesion.

  The socket 24 is a substantially columnar member made of an electrically insulating material, and has one end portion inserted into the socket insertion pipe 32 and the other end portion protruding from the main body portion 19. Although not shown, a lead wire receiving hole for receiving a lead wire having one end electrically connected to the base 26 and the other end electrically connected to the light emitter 11 is formed inside the socket 24. Has been.

  The base 26 is a conductive member attached to the tip of the socket 24 and is molded into a predetermined shape such as “E11” or “E17”.

  The cover 14 is a member placed on the surface of the recess 20 to which the light emitter 11 is attached. In the present embodiment, as described above, since the light emitter mounting plate 28 is attached to the bottom surface 20a of the recess 20, the cover 14 is placed on the surface of the light emitter mounting plate 28 (that is, And placed on the surface of the recess 20 via the light emitter mounting plate 28). A plurality of light emitter exposure holes 34 are formed in the cover 14 according to the mounting positions of the light emitters 11, and light emitted from the light emitters 11 is emitted forward through the light emitter exposure holes 34. Is done.

  A tapered surface 40 is formed on the peripheral edge of the cover 14 so as to be away from the surface (= the back surface 16a) facing the recess 20 of the front cover 16 as it goes to the peripheral end. The tapered surface 40 may be formed on the entire peripheral edge of the cover 14 as shown in the present embodiment, but only if it is formed only on the peripheral edge of the cover 14 facing a leg portion 38 (described later). Good.

  The cover 14 serves not to make the conductive circuit (not shown) mounted on the surface of the light emitter mounting plate 28 invisible from the outside, but also to the light emitter 11 to which the conductive circuit (not shown) is electrically connected. By pressing the solder on the power supply terminal, when the solder is softened by heat generated when the light emitter 11 emits light, it is avoided that the light emission stops when the conductive circuit (not shown) is detached from the power supply terminal. Have a role. Furthermore, as shown in FIG. 7, it also has a role as a reflector holder in providing individual reflectors 36 for the respective light emitters 11. Note that the reflector 36 is not an essential component (FIG. 9 shows a case where the reflector 36 is not provided).

  The front cover 16 is a member having translucency (semi-transparent or transparent) disposed so as to cover the opening 20b of the recess 20, and is formed in a substantially disc shape in this embodiment. Yes. The shape of the front cover 16 may be another shape as long as it corresponds to the shape of the opening 20b.

  The front cover 16 has a plurality of leg portions 38 extending from the surface facing the recess 20 (= the back surface 16a) to the recess 20 in addition to the front cover main body 44. The length L of these leg portions 38 (see FIG. 11) is such that when the front cover 16 is fixed by the front cover fixing member 18, the cover 14 extends along the direction in which the leg portions 38 extend from the base of the leg portion 38. Is set to be longer than the distance D to the tapered surface 40 (see FIG. 13). In the present embodiment, the three leg portions 38 are arranged at equal intervals on the same circumference, but the number of the leg portions 38 may be two, or four or more. As shown in FIG. 10, it may be a wide leg portion 38 whose cross section is formed in an arc shape.

  The front cover fixing member 18 is a substantially flat ring-shaped member for fixing the front cover 16 to the lamp body 12. As shown in FIG. 9, the front cover fixing member 18 has a fixing member flange 80 that is in contact with the flange 70 of the lamp main body 12 in order from the circumferential end to the inner surface on the surface (= back surface) facing the lamp main body 12. A second screw 82 that is formed outward and is screwed with the first screw 72, and a pressing portion 84 that presses the front cover 16 toward the lamp body 12. Further, a plurality of tool holes 86 for fitting tools (not shown) for rotating the front cover fixing member 18 when the front cover fixing member 18 is attached to the lamp body 12 on the surface of the front cover fixing member 18. (Three places in the present embodiment) and a plurality of grooves 88 are formed.

  Next, the procedure for assembling the lamp 10 to which the present invention is applied will be described. The socket 24 to which the base 26 has been attached in advance is inserted and fixed in the socket insertion pipe 32 of the lamp body 12, and the other end of the lead wire whose one end is electrically connected to the base 26 is connected to the lead wire receiving hole. Through the bottom surface 20a of the recess 20. After that, after the other end of the lead wire is electrically connected to the light emitter mounting board 28 on which the light emitter 11 and the conductive circuit are mounted, the light emitter mounting board 28 is connected to the bottom surface 20 a of the recess 20. On the other hand, it is fixed with screws 30.

  After fixing the light emitter mounting board 28, the cover 14 is placed on the surface of the light emitter mounting board 28 (see FIG. 11). As will be described later, the positioning (alignment) of the cover 14 is performed at the same time as the front cover 16 is fixed. At this stage, rough positioning (for example, the position of the light emitter 11 and the hole for exposing the light emitter) is performed. For example, the position of 34 may be adjusted).

  After the cover 14 is placed, the O-ring 42 is attached to the O-ring groove 76, and the front cover 16 is placed so as to cover the opening 20b of the recess 20 (see FIG. 12). At this stage, at least the tip of the leg portion 38 of the front cover 16 is in contact with the tapered surface 40 of the cover 14, or the back surface 16 a of the front cover 16 is in contact with the O-ring 42.

  Thereafter, the front cover fixing member 18 is rotated using a tool so that the first screw 72 and the second screw 82 are screwed together. As the front cover fixing member 18 is rotated, the pressing portion 84 of the front cover fixing member 18 presses the front cover 16 toward the lamp body 12. Along with this, the O-ring 42 is deformed and the airtightness between the front cover 16 and the O-ring groove 76 is improved (see FIG. 13).

  When the front cover 16 is pressed toward the lamp body 12, the leg portion 38 is bent as the tip of the leg portion 38 slides on the tapered surface 40 toward the peripheral end of the cover 14. When the leg portion 38 is bent, a reaction force is generated at the tip of the leg portion 38 toward the center of the cover 14, and the taper surface 40 is pushed toward the center of the cover 14 by this reaction force. Such a reaction force is generated at the legs 38 that are equally divided and arranged, whereby the cover 14 is positioned (aligned) at the center of the front cover 16 and fixed.

  When the front cover fixing member 18 is screwed to the extent that the back surface 16a of the front cover 16 contacts the front cover receiving portion 74 at the opening end 20c of the recess 20, the clamping and fixing of the front cover 16 is completed.

  According to the present embodiment, the front cover fixing member 18 is formed by screwing the second screw 82 of the front cover fixing member 18 formed separately from the front cover 16 with the second screw formed on the lamp body 12. The front cover 16 can be easily and reliably fixed to the lamp body 12 by uniformly pressing the peripheral edge of the front cover 16 with 18.

  Further, by interposing the O-ring 42 between the front cover 16 and the lamp main body 12, the airtightness between the front cover 16 and the lamp main body 12 can be further enhanced.

  Further, the plurality of legs 38 extended from the front cover 16 can position (align) the cover 14 at the same time as fixing the front cover 16, so that the assembly accuracy can be improved. The process of fixing the cover 14 or the like during assembly can be omitted, which can contribute to the efficiency of assembly work.

  DESCRIPTION OF SYMBOLS 10 ... Lamp, 11 ... Luminescent body, 12 ... Lamp main body, 14 ... Cover, 16 ... Front cover, 18 ... Front cover fixing member, 19 ... Main body part, 20 ... Recess, 22 ... Fin, 24 ... Socket, 26 ... Base: 28 ... Light emitter mounting plate, 30: Screw, 32 ... Socket insertion pipe, 34 ... Light emitter exposure hole, 36: Reflector, 38 ... Leg, 40 ... Tapered surface, 42 ... O-ring, 44 ... Front cover main body, 70 ... flange, 72 ... first screw, 74 ... front cover receiving part, 76 ... O-ring groove, 80 ... fixing member flange, 82 ... second screw, 84 ... pressing part, 86 ... hole for tool , 88 ... groove

The invention described in claim 1 includes a light emitter, a lamp body having a recess to which the light emitter is attached, a translucent front cover disposed so as to cover an opening of the recess, and the front cover. a front cover fixing member for fixing the a fixing structure of a front cover and an O-ring.

In the front cover fixing structure according to claim 1, the lamp body includes a first screw formed on the inner surface of the opening end of the recess, and a front cover receiving portion formed on the center side of the first screw. And a flange formed on the peripheral end side of the first screw. The front cover receiving portion is formed with an O-ring groove to which an O-ring is attached. Further, the front cover fixing member is formed with an outwardly formed second screw that is screwed with the first screw, and a pressing portion that is formed closer to the center than the second screw and presses the front cover toward the front cover receiving portion. And a fixing member flange formed on the peripheral end side of the second screw and abutting against the flange. Further, by screwing the second screw into the first screw, the front cover pressed by the pressing portion deforms the O-ring and seals between the front cover and the lamp main body, and the front cover fixing member and the lamp main body are sealed. The front cover is fixed between the two.

The invention described in claim 2 relates to an improvement in the fixing structure of the front cover according to claim 1 ,
It further includes a cover placed on the surface of the recess where the light emitter is attached,
The front cover has a plurality of legs extending from the surface facing the recess of the lamp body toward the recess,
On the peripheral edge of the cover facing the leg, a taper surface is formed that moves away from the surface facing the recess of the front cover as it goes to the peripheral edge.
The length of the leg is set to be longer than the distance from the base of the leg to the taper surface along the direction in which the leg extends when the front cover is fixed by the front cover fixing member. It is characterized by being.

The invention described in claim 3 is a lamp to which the fixing structure of the front cover according to claim 1 or 2 is applied.

Claims (4)

A light emitter;
A lamp body having a recess to which the light emitter is attached;
A translucent front cover disposed to cover the opening of the recess;
A front cover fixing member for fixing the front cover;
A first screw is formed on the inner surface of the opening end of the recess in the lamp body,
The front cover fixing member is formed outwardly with a second screw that engages with the first screw,
A front cover fixing structure for fixing the front cover between the front cover fixing member and the lamp body by screwing the second screw into the first screw. In addition to having an O-ring,
The front cover fixing member further includes a pressing portion that presses the front cover toward the lamp body on the center side of the second screw.
An O-ring groove to which the O-ring is attached is formed in the peripheral edge of the opening of the recess in the lamp body.
2. The front cover fixing structure according to claim 1, wherein the O-ring is deformed by the front cover pressed by the pressing portion, whereby the space between the front cover and the lamp body is hermetically sealed. Further comprising a cover placed on the surface of the recess to which the light emitter is attached,
The front cover has a plurality of legs extending from the surface facing the recess of the lamp body toward the recess,
A taper surface is formed on the peripheral portion of the cover facing the leg portion so as to move away from the surface facing the recess of the front cover as it goes to the peripheral end.
The length of the leg portion is longer than the distance from the base of the leg portion to the taper surface along the direction in which the leg portion extends when the front cover is fixed by the front cover fixing member. The front cover fixing structure according to claim 1, wherein the front cover fixing structure is set to be.   A lamp to which the front cover fixing structure according to any one of claims 1 to 3 is applied.

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