CN201551295U

CN201551295U - Mouth lamp with LED multiple light-sources and convex lenses

Info

Publication number: CN201551295U
Application number: CN2009202380885U
Authority: CN
Inventors: 朱坚; 宋先琪; 宋永茂
Original assignee: Zhuhai Siger Medical Equipment Co Ltd
Current assignee: Zhuhai Siger Medical Equipment Co Ltd
Priority date: 2009-10-29
Filing date: 2009-10-29
Publication date: 2010-08-18
Anticipated expiration: 2019-10-29

Abstract

The utility model relates to lighting equipment for dental surgery, in particular to a mouth lamp used for dental surgery. A mouth lamp with LED multiple light-sources and convex lenses comprises a light source and ten convex lenses, wherein the light source consists of ten LEDs; the ten LEDs are arranged in three lines, with three in the first line, four in the second line and three in the third line; each LED lamp of the first line is aligned with each LED lamp of the third line; the LED lamps of the second line are staggered with the LEDs of the other two lines; a luminescent chip encapsulated by each LED lamp is a square; each convex lens is positioned in front of the corresponding LED lamp; and the luminescent chip of each LED lamp is arranged within one time of the focal length corresponding to the convex lens. The mouth lamp with the LED multiple light-sources and convex lenses has the advantages of small heat loss, no damage to patients, sufficient light intensity, clear edges of the light plate, long service life and the like.

Description

LED multiple light courcess convex lens mouth lamp

Technical field

This utility model relates to the dental operation luminaire, relates in particular to the dental operation mouth lamp.

Background technology

In the dental operation therapeutic process,, generally on therapy apparatus, all can be furnished with special-purpose mouth lamp (being also referred to as " dentistry illuminating lamp ") owing to the deficiency of indoor natural light line.Mouth lamp is different from general luminaire, it for hot spot to the distance of mouth lamp, the shape size of hot spot, the light intensity in the hot spot, the light intensity that hot spot is outer, or the like clear and definite requirement all arranged.Generally requiring hot spot is 700-800mm to the distance of mouth lamp, the rectangle that is shaped as 140 * 70mm of hot spot, and the light intensity of hot spot inside is that 8000lx～22000lx (adjustable) and inner light intensity are even.The outer light intensity requirement of hot spot is not more than 1200lx apart from spot center 70mm place light intensity.

The tradition mouth lamp is a light source with single Halogen light, and the semicircular arc illuminator is arranged behind Halogen light.On the illuminator along the cambered surface successive rectangle facet of arranging.Each facet reflects the light of Halogen light and converges the back at rectangular light spot of 700～800mm place formation.The disadvantage of this mouth lamp is that thermal losses is big, and patient treats under this mouth lamp and has burning sensation.The mouth lamp ubiquity power that simultaneously with the Halogen light is light source is big, the intensity of illumination deficiency, and the hot spot blur margin is clear, and the life-span is short, mouth lamp defective such as can not work after single Halogen light damages.

The utility model content

The purpose of this utility model is to overcome shortcoming of the prior art, provides a kind of thermal losses little, long to patient's not damaged, light intensity foot, tabula rasa edge clear, life-span LED multiple light courcess convex lens mouth lamp.

For achieving the above object, this utility model provides following technical scheme:

LED multiple light courcess convex lens mouth lamp,

Comprise:

Light source, it is made of ten LED lamps, and these ten LED lamp branch triplex rows are arranged, three of first row, 4 of second row, three of the third lines, first row aligns with each LED lamp of the third line, and the LED lamp of second row and other two rows' LED lamp staggers; The packaged luminescence chip of each LED lamp is a square;

Ten convex lenss, each convex lens lay respectively at the place ahead of the LED lamp corresponding with it, and the luminescence chip of each LED lamp is positioned at one times of focal length of its pairing convex lens.

This utility model LED multiple light courcess convex lens mouth lamp adopts the LED lamp to replace Halogen light as light source.LED lamp consumed energy reduces 80% with the Halogen light of light efficiency, can convert more energy to luminous energy, has improved efficient, also greatly reduces the burning sensation of patient when treating under mouth lamp simultaneously.The LED lamp uses low-tension supply, and supply voltage is specially adapted to the public place between 3-24V.The LED lamp body is long-pending little, is fit to many group arrangements and uses.LED lamp good stability, the life-span is long, and the single lamp life-span can reach 100,000 hours.LED lamp response time is short, and the response time of Halogen light is a Millisecond, and the response time of LED lamp is a nanosecond.All be better than Halogen light at all many-sided LED lamps.Secondly, the light that uses convex lens that light source is sent reflects and converges, thereby replaces traditional illuminator.So not only obtain hot spot preferably, but also avoided the luminous energy loss in the reflection process.(140 * 70mm), our the packaged luminescence chip of LED lamp of selection must be square when utilizing this principle to converge hot spot because mouth lamp has special requirement for the shape of formation hot spot.The luminescence chip of LED lamp is placed in one times of focal length of convex lens, and the light that the LED lamp sends is dispersed, and at this moment we just can obtain the square hot spot of an amplification in an other side of convex lens.Adjust the LED lamp to the distance between convex lens, just can adjust the angle of divergence of beam, thereby adjust the amplification of square hot spot.We just can obtain the square hot spot of a 70 * 70mm at distance convex lens 700～800mm place like this.Certainly only so square hot spot is not enough.We adopt the synergetic way of a plurality of square hot spots to obtain even brightness 140 * 70mm rectangular light spot.In order to guarantee that the light that each LED lamp is sent can project fixed zone, each LED bulb is also different to the locus in its corresponding convex lens axle center.After the light stack that a plurality of LED bulbs send, just can pool a sharpness of border even brightness rectangular light spot in specified distance.

Description of drawings

Fig. 1 is single led source imaging sketch map;

Fig. 2 is a plurality of led light source imaging stack sketch maps;

Fig. 3 is that this utility model LED multiple light courcess convex lens mouth lamp light source is to convex lens axle core offset distance front view;

Fig. 4 is the installation diagram of this utility model LED multiple light courcess convex lens mouth lamp.

The utility model is described in further detail below in conjunction with drawings and Examples.

The specific embodiment

As shown in Figure 1, LED lamp 100 is positioned at 200 1 times of focal lengths of convex lens as light source, and this moment, the convex lens imaging was the upright amplification virtual image 300.So we can obtain shape and the identical hot spot of LED lamp luminescence chip shape in an other side of convex lens.Selecting luminescence chip is that quadrate LED lamp just can obtain a quadrate hot spot by this convex lens.Select which type of convex lens also very crucial at this.If we select for use general spherical convex lens also can obtain a square focus spot.But because the existence of the spherical aberration of spherical convex lens own, there is edge deformation in the hot spot that presents, the defective that obscure boundary is clear.For this reason, we have selected a kind of more special convex lens, and the curved surface of this convex lens both sides has different curvature, and convex lens is a sphere to light source one side, and the curved surface of backlight one side is an aspheric surface.So effectively eliminated the spherical aberration of convex lens, the hot spot profile that obtains does not have distortion, sharpness of border.Obtained good effect.

After convex lens was determined, we can be by regulating the LED lamp is regulated hot spot to the distance of focal length of convex lens size.We just can obtain the square focus spot of a 70 * 70mm at distance convex lens 700mm place like this.In order to obtain desired a 140 * 70mm rectangular light spot of mouth lamp, we have adopted 10 LED lamps as light source, its hot spot are superposeed, as shown in Figure 2.

10 LED lamps are fixed on the LED bulb fixing circuit board 405 in Fig. 2, and the LED lamp is accurately located.The light that the LED lamp is sent is by 10 convex lenss, 201～210 overlapping projecting in the rectangular area that an area is 140 * 70mm (being made of two square area 231,232).Wherein the light that sent of Zuo Ce 4 LED lamps 4 convex lenss 201～204 seeing through the left side respectively project in the zone 231 in left side, 4 convex lenss 207～210 that the light that 4 LED lamps on right side are sent sees through the right side respectively project in the zone 232 in left side, and the light that intermediary 2 LED lamps are sent sees through the joint portion that intermediary 2 convex lenss 205,206 project left field 231 and right side area 232 respectively.Do the rectangular light spot that has not only formed a 140 * 70mm like this, and make that the interior light intensity in zone is even, effectively eliminated the defective of zone line insufficient light.Owing to be a plurality of light sources, can provide the stability of mouth lamp greatly simultaneously, when single led lamp broke down, whole mouth lamp still can be worked.

As shown in Figure 3, can project fixed zone in order to guarantee the light that each LED lamp is sent, each LED lamp is also different to the locus in its corresponding convex lens axle center.Great circle is the convex lens position among Fig. 3, and roundlet is the center of LED lamp.Can see that each group convex lens and its corresponding LED lamp are not co-axial.These ten LED lamp branch triplex rows are arranged, three of first row, and 4 of second row, three of the third lines, first row aligns with each LED lamp of the third line, and the LED lamp of second row and other two rows' LED lamp staggers.

In order to guarantee the operate as normal of mouth lamp illumination section, also need parts such as convex lens fixing head, control circuit, cooling system.

As shown in Figure 4, this mouth lamp is made up of parts such as convex lens 200, LED lamp 100, LED lamp fixing circuit board 405, convex lens fixing head 403, convex lens cover plate 401, control circuit 408, fin 407, thermal conductive silicon glue-lines 406.Wherein the effect of convex lens fixing head 403 is very important, and it is not only controlling the exact position of each convex lens, is also controlling the distance of convex lens to the LED lamp.The precision of these sizes is seriously influencing the hot spot effect of mouth lamp.What connect each convex lens and LED lamp simultaneously all is a small-sized prefocus cup, does so not only and can effectively assemble the light that the LED lamp is sent, but also avoided light source with the interference between light source, and the hot spot that makes single led lamp send is clear and indeformable.Can in time reduce the temperature of LED lamp by fin 407, thermal conductive silicon glue-line 406, fan (figure does not show) cooling system of forming, guarantee that mouth lamp can for a long time stable work.Thermal conductive silicon glue-line 406 two ends connect fin 407 and described LED lamp respectively, and fan is positioned at a side of fin 407.

This enforcement mainly concentrates on the variation of the number of LED lamp and convex lens with novel distortion or the variation that also has other, and the variation of LED lamp and convex lens spatial arrangement position.Only need just can obtain the hot spot of different distance different shape if those skilled in the art obtains enlightenment of the present invention, and not need performing creative labour, also should fall into protection scope of the present invention in the number and the locational change of LED lamp and convex lens.

Claims

1.LED multiple light courcess convex lens mouth lamp,

It is characterized in that, comprise

2. LED multiple light courcess convex lens mouth lamp according to claim 1,

It is characterized in that:

Described ten LED lamps are fixed on the LED bulb fixing circuit board.

3. LED multiple light courcess convex lens mouth lamp according to claim 2,

It is characterized in that:

All convex lenss all are fixed on the convex lens fixing head.

4. LED multiple light courcess convex lens mouth lamp according to claim 3,

It is characterized in that:

Also comprise a cooling system, this cooling system comprises fin, thermal conductive silicon glue-line and fan, and thermal conductive silicon glue-line two ends connect fin and described LED lamp respectively, and fan is positioned at fin one side.

5. LED multiple light courcess convex lens mouth lamp according to claim 4,

It is characterized in that:

Described convex lens is a sphere to light source one side, and the curved surface of backlight one side is an aspheric surface.