CN216210229U - Fluorescent powder-free LED magnifier - Google Patents

Abstract

The utility model discloses a fluorescent powder-free LED magnifier, which comprises a plurality of LED light sources, a substrate, a magnifier lens, a battery, a control panel, a touch induction switch, a light guide strip, a Micro-usb interface, a shell front frame, a shell rear frame, a light transmission window and the like, wherein the LED light sources are white light LED light sources or golden yellow light LED light sources directly synthesized by multi-primary color LED chips, and the LED chips are high-luminous-efficiency yellow light LED chips, high-luminous-efficiency green light LED chips, high-luminous-efficiency blue light LED chips and high-luminous-efficiency red light LED chips. The utility model adopts the non-fluorescent powder type LED light source to directly emit light, solves the problems of low reliability and difficult coordinated development of color temperature and lighting effect caused by the use of the fluorescent powder of the white light LED light source of the traditional magnifier, has the advantages of blue light controllability, high reliability and the like, reduces the number of LED light sources by using the light guide strip, realizes the uniform illumination of the magnifier, and reduces glare. The magnifying glass adopts the battery module that can charge and discharge, charges through the Micro-usb socket, reduces the environmental protection problem that the battery was changed and is brought.

Description

Fluorescent powder-free LED magnifier

Technical Field

The utility model relates to a magnifier, in particular to a fluorescent powder-free LED magnifier.

Background

Magnifying glasses are simple visual optics used to view minute details of an object, and are converging lenses with a focal length much smaller than the apparent distance of the eye. The magnifier is widely applied in daily life, but the traditional magnifier is simple in structure and only comprises a magnifier lens and a magnifier handle, and the simple structure causes the traditional magnifier to be limited in use occasions, wherein the most important phenomenon is that the magnifier can only be used in bright scenes but cannot be used in dim scenes. Therefore, the development of the magnifying glass which can be normally used under any ambient brightness is of great significance.

At present, common magnifying glasses which can be used in dim light scenes on the market are generally realized by directly increasing a plurality of white light LED light sources on a mirror frame, the LED light sources often emit blue light through a chip to excite yellow fluorescent powder to synthesize white light, and in the long-time use process, the failure of the fluorescent powder brings the leakage of high-intensity blue light, so that the blue light is damaged. In addition, the magnifier also has the problems of uneven light distribution, glare caused by direct irradiation of the white light LED light source to human eyes, low reliability of the white light LED light source caused by the use of fluorescent powder and the like.

In the prior patent, for example, chinese patent publication No. CN206627696U, publication date is 2017, 11, and 10, which discloses a magnifying glass with an LED lamp, the magnifying glass is used under the condition of dim light by installing a plurality of white LED light sources in a containing groove of a housing. However, the white light LED light source used by the magnifier is obtained by exciting the fluorescent powder by the blue light LED chip, the reliability of the fluorescent powder is reduced along with the increase of the service time, the leakage of high-intensity blue light can be caused, the actual service effect is influenced, in addition, the leakage of the high-intensity blue light can generate adverse effect on the biological rhythm of a user, and the adverse effect is specifically expressed by inhibiting the secretion of melatonin, causing disorder of a biological clock, causing sleep disorder and the like. Meanwhile, the LED light sources are distributed dispersedly, so that the problems of uneven light distribution and serious glare exist. Therefore, it is especially important to research an LED magnifier with high reliability, high biological safety, uniform and soft light emitting, and no glare.

Disclosure of Invention

The utility model aims to provide a fluorescent powder-free LED magnifier, which adopts a multi-primary-color LED light source, avoids the use of fluorescent powder, and solves the problems of uncontrollable blue light, low reliability and difficulty in coordinated development of color temperature and light effect of the traditional fluorescent powder type white LED magnifier; meanwhile, through the secondary optical structure of the light guide strip, the problems of uneven light emitting and serious glare of the traditional white light LED magnifier are solved.

The purpose of the utility model is realized as follows:

a fluorescent powder-free LED magnifier comprises an LED light source, a substrate, a magnifier lens, a battery, a control panel, a touch sensing switch, a light guide strip sleeve, a shell front frame, a shell rear frame, a light transmission window and a tail plug, wherein the light guide strip sleeve is in a three-way shape, the LED light source is attached on the substrate through a welding flux, the substrate is fixed in a substrate limiting groove which is opened downwards in the light guide strip sleeve in a mechanical connection mode, the normal direction of the light emitting surface of the LED light source is consistent with the axial direction of a through hole of the light guide strip sleeve, two ends of a pin of the LED light source are respectively fixedly connected with a circuit on the substrate, the circuit on the substrate is connected with the control panel through an electric wire, the control panel is respectively connected with the battery and the touch sensing switch through electric wires, the control panel realizes limiting fixation through a shell positioning column, two ends of the light guide strip are arranged in the through holes at the left end and the right end of the light guide strip sleeve, the light guide strip is fixed at the light guide strip limiting groove reserved between the shell front frame and the light transmission window, the light-transmitting window passes through the mutual gomphosis of draw-in groove and shell back frame to the realization is to the transmission of leaded light strip light-emitting and to the sealed protection of leaded light strip, and the magnifying glass lens is installed before the shell on the reservation position of frame, and frame and shell back frame realize seamless connection through mechanical connection's mode before tail stopper, the shell, and the LED light source adopts no phosphor powder technique, directly adopts the LED chip as the light source, the LED light source is the white light LED light source of high light efficiency yellow light LED chip, high light efficiency green glow LED chip, high light efficiency blue light LED chip and the direct synthesis of high light efficiency ruddiness LED chip, or the golden yellow light LED light source of high light efficiency yellow light LED chip and the direct synthesis of high light efficiency ruddiness LED chip.

Further, the white light LED light source consists of 1-4 yellow light LED chips, 1-4 green light LED chips, 1-4 blue light LED chips and 1-4 red light LED chips, and the golden yellow light LED light source consists of 1-4 yellow light LED chips and 1-4 red light LED chips; the peak wavelength range of the yellow light LED chip is 550 nm-579 nm, the peak wavelength range of the green light LED chip is 510 nm-549 nm, the peak wavelength range of the blue light LED chip is 450 nm-479 nm, the peak wavelength range of the red light LED chip is 610 nm-650 nm, a plurality of LED chips are connected in series and driven by single constant current, or a plurality of LED chips are connected in parallel and driven by multi-path current.

Furthermore, the number of the LED light sources is 2, the LED light sources are connected in series, and the LED light sources are driven by single constant current; the two substrates are arranged back to back, the back surfaces of the two substrates are connected through heat-conducting silicone grease, and the substrates are ceramic substrates, aluminum substrates or copper substrates.

Furthermore, the shape of the magnifier lens is the same as the shape of the upper openings of the front frame and the rear frame of the shell, and the magnifier lens is round or square, the magnifier lens has single magnification or two different magnifications, and the magnifier lens is made of one of transparent polymethyl methacrylate (PMMA), Polycarbonate (PC) or glass.

Further, the LED light source comprises a primary optical lens, the material of the primary optical lens is one of silica gel, epoxy resin, polyurethane, silica gel, epoxy resin or polyurethane with silica dioxide or titanium dioxide micro-nano scattering particles doped inside, and the shape of the primary optical lens is one of a spherical cap, a free-form surface or a surface microstructure array.

Further, the light guide strip can realize light extraction and uniform illumination, and the structure of the light guide strip is one of a core-spun structure, a scored structure or a bulk-doped structure; the core-spun structure consists of a high-refractive-index transparent fiber core layer and a low-refractive-index transparent coating layer, wherein the high-refractive-index transparent fiber core layer is made of one of Methyl Methacrylate (MMA) polymer, thermoplastic polyurethane elastomer rubber (TPU), polymethyl methacrylate (PMMA) or Polycarbonate (PC), and the low-refractive-index transparent coating layer is made of Polytetrafluoroethylene (PTFE); the nick structure is formed by equally spaced nicks on the surface of the light guide strip, and the light guide strip is made of one of PMMA, PC or silica gel; the body doping structure is micro-nano scattering particles with specific concentration gradient doped inside the matrix of the light guide strip, the doping concentration is increased progressively from the LED light source to the middle section of the light guide strip according to the length, the matrix material of the light guide strip is one of PMMA, PC or silica gel, and the material of the micro-nano scattering particles is one of silicone resin, polycarbonate, polymethyl methacrylate, silicon dioxide, titanium dioxide, zirconium dioxide, aluminum nitride, barium sulfate or calcium carbonate.

Further, the light transmission window can realize the sealed protection to the leaded light strip, and the material of light transmission window is one of polymethyl methacrylate (PMMA), Polycarbonate (PC) or glass, or the inside of light transmission window contains the micro-nano scattering granule of silica or titanium dioxide, or the surface of light transmission window contains the microstructure array.

Furthermore, a Micro-usb interface is arranged on the control board, so that charging and discharging of the battery can be realized; the control board is respectively connected with the positive electrode and the negative electrode of the battery and the positive electrode and the negative electrode on the substrate through electric wires, the inductive switch is connected with the control board through a shielding wire, and when charging is carried out, current sequentially passes through the Micro-usb, the control board and the battery; during the discharging process, current sequentially passes through the control panel and the substrate from the battery to the LED light source, and the control panel realizes boosting constant-current driving. The touch sensing switch is fixed on the front frame of the shell through bonding glue, receives an external touch signal and transmits the external touch signal to the control panel through the shielding wire, and the on-off control of the light source is realized.

Further, the material of the magnifier shell is one of ABS, PC, ABS + PC, PP or PE.

Furthermore, the battery is a chargeable and dischargeable battery, and is one of a lithium battery, a nickel-cadmium battery or a lead-acid battery

The utility model is characterized in that: the non-phosphor multi-primary-color LED is used as a light source of the magnifier, and the light emitted by the multi-primary-color LED is guided by the light guide strip, so that uniform light emission is realized, and uniform illumination effect of a target plane is realized; the LED light source is directly composed of multi-primary-color LED chips, so that the use of fluorescent powder is avoided, the reliability of the LED light source is improved, and the blue light is controllable; the use of the light guide strip reduces the number of LED light sources, improves the uniformity of illumination intensity and reduces glare. The magnifying glass adopts the battery module that can charge and discharge, charges through the Micro-usb socket, reduces the environmental protection problem that the battery was changed and is brought. The utility model solves the problems of low reliability and difficult coordinated development of color temperature and lighting effect caused by using a fluorescent powder type white light LED light source in the traditional magnifier, has the advantages of blue light controllability, high reliability and the like, improves the lighting quality of the traditional magnifier, and improves the use comfort of users.

Drawings

FIG. 1 is a schematic view of the overall structure of a phosphor-free LED magnifier according to embodiment 1 of the present invention;

FIG. 2 is a schematic diagram showing a separated structure of a phosphor-free LED magnifier in embodiment 1 of the present invention; fig. 3 is a schematic structural view of a light guide bar sleeve, wherein: fig. a is a schematic view of the overall structure of the light guide strip casing, and fig. b is a schematic view of a half-section of the light guide strip casing;

fig. 4 is a schematic structural diagram of an LED light source according to embodiment 1 of the present invention;

fig. 5 is a schematic layout diagram of a golden light LED chip according to embodiment 1 of the present invention;

FIG. 6 is a graph showing a spectrum of a gold yellow LED according to example 1 of the present invention;

fig. 7 is a schematic layout view of a four-primary-color white LED light source chip according to embodiment 2 of the present invention;

FIG. 8 is a light source spectrum curve diagram of a four primary color white LED according to embodiment 2 of the present invention;

fig. 9 is a schematic structural diagram of an LED light source with a microstructure array on a surface according to embodiment 4 of the present invention.

Detailed Description

The present invention is described in more detail below with reference to examples, but the following examples are illustrative only, and the scope of the present invention is not limited by these examples.

Example 1:

as shown in fig. 2, a fluorescent powder-free LED magnifier includes a front housing frame 110, a magnifier lens 103, a rear housing frame 111, a light-transmitting window 112, and a tail plug 113, the front housing frame 110, the rear housing frame 111, and the tail plug 113 are mutually embedded via slots, and the front housing frame 110 is mechanically connected to the rear housing frame 111 via housing positioning posts 116, and the front housing frame 110, the rear housing frame 111, and the tail plug 113 are all made of ABS material. The magnifier lens 103 is installed on the reserved position of the front frame 110 of the shell, a high-power lens 114 is embedded in the magnifier lens 103, and the magnifier lens 103 is made of PMMA. The light guide bar 107 gomphosis is on light transmission window 112, and light transmission window 112 passes through the mutual gomphosis of draw-in groove and shell rear bezel 111, realizes drawing the spacing and the light of light guide bar 107 light-emitting of light guide bar 107, and the material of light transmission window 112 is PC.

The fluorescent powder-free LED magnifier further comprises an LED light source module: the LED light source 101, the aluminum substrate 102, the light guide strip 107 and the light guide strip sleeve 108; the two LED light sources 101 are respectively attached to the two aluminum substrates 102 through solders, the two aluminum substrates 102 are installed back to back, the back surfaces of the two aluminum substrates 102 are connected through heat-conducting silicone grease, the light guide strip sleeve 108 is in a three-way shape, the two aluminum substrates 102 are upwards fixed at an aluminum substrate limiting groove 1082 which is arranged in the light guide strip sleeve 108 and is opened downwards, the normal direction of the light emitting surface of the LED light sources 101 is consistent with the axial direction of the through hole 1081 of the light guide strip sleeve 108, and the aluminum substrates 102 are connected with the control board 105 through wires; the two ends of the light guide bar 107 are arranged in the through holes 1081 at the left end and the right end of the light guide bar sleeve 108, and the light guide bar 107 is integrally fixed at the light guide bar limiting groove 115 reserved on the front frame 110 and the light-transmitting window 112 of the shell; light guide bar 107 is the core-spun structure, comprises high refracting index transparent fine sandwich layer and low refracting index transparent coating, and high refracting index transparent fine sandwich layer material is Methyl Methacrylate (MMA) polymer, and low refracting index transparent coating material is Polytetrafluoroethylene (PTFE).

The fluorescent powder-free LED magnifier further comprises a power supply module: the battery 104, the control panel 105, the touch-sensitive switch 106 and the Micro-usb interface 109, the control panel 105 is connected with the positive and negative electrodes of the battery 104 through wires, the control panel 105 is connected with the positive and negative electrodes on the substrate 102 through wires, the control panel 105 is connected with the touch-sensitive switch 106 through a shielding wire, the battery 104 is a rechargeable lithium battery, and the touch-sensitive switch 106 is adhered to a groove on the inner side of the front frame 110 of the shell through a colloid to control the light source switch. The limiting fixation of the control panel 105 is achieved through the shell positioning column 116, the Micro-usb interface 109 and the charging indicator lamp 117 are arranged on the control panel 105, the charging and charging state prompting of the magnifier is achieved, the red lamp is in the charging state, and the green lamp is in the full-power state.

The structure of the light source 101 is as shown in fig. 4, and includes LED chips 201, a die attach layer 202, a ceramic substrate 203, a ball cap lens 204, gold wires 205, and a circuit 206, wherein four LED chips 201 are arranged at intervals, the LED chips 201 are respectively fixed on the ceramic substrate 203 through the die attach layer 202, two ends of pins of the LED chips 201 are fixedly connected to the circuit 206 on the ceramic substrate 203 through the gold wires 205, and the silicone ball cap lens 204 is mounted on the ceramic substrate 203, so as to implement mechanical protection and light extraction for the four LED chips 201.

As shown in fig. 5, the 4 LED chips 201 are composed of 2 yellow LED chips 301 and 2 red LED chips 302. The yellow light LED chip 301 is a high-light-efficiency vertical structure yellow light LED chip prepared by an AlInGaN material system, the peak wavelength of the yellow light LED chip 301 is 550nm, the red light LED chip 302 is a high-light-efficiency vertical structure red light LED chip prepared by an AlGaInP material system, the peak wavelength range of the red light LED chip 302 is 620 nm, and the light source spectral curve of the golden light LED is shown in FIG. 6.

Example 2:

as shown in fig. 7, the magnifier structure is substantially the same as that of embodiment 1, except that:

the LED light source 101 is a four-primary-color white LED light source composed of 1 yellow LED chip 501, 1 green LED chip 502, 1 blue LED chip 503, and 1 red LED chip 504. The peak wavelength of the yellow light LED chip is 570 nm, the peak wavelength of the red light LED chip is 620 nm, the peak wavelength of the blue light LED chip is 460 nm, the peak wavelength of the green light LED chip is 520 nm, and the spectrum curve of the white light LED light source is shown in FIG. 8. The magnifier lens 103 is a PC lens with single magnification, the substrate 102 is a ceramic substrate, the light-transmitting window 112 is made of PMMA with a microstructure array on the surface, the primary optical lens of the LED light source 101 is an epoxy resin ball cap lens with 1% mass concentration titanium dioxide particles doped inside, and the battery 104 is a rechargeable lead acid battery. The light guide bar 107 is a notch structure, that is, rectangular notches are arranged on the surface of the light guide bar 107 at equal intervals, and the light guide bar 107 is made of PMMA.

Example 3:

the structure is substantially the same as that of example 1, except that: the magnifier lens 103 is a PC lens with single magnification, the substrate 102 is a ceramic substrate, the light-transmitting window 112 is made of PMMA with a microstructure array on the surface, and the primary optical lens of the LED light source 101 is an epoxy resin ball cap lens with 1% mass concentration titanium dioxide particles doped inside. The structure of leaded light strip 107 is the body doping structure, mixes the micro-nano scattering particle of certain concentration gradient promptly in the inside base member of leaded light strip 107, and doping concentration increases progressively according to length from LED light source 101 to leaded light strip 107 middle section, the material of leaded light strip 107 is silica gel, the material of micro-nano scattering particle is titanium dioxide nanoparticle.

Example 4:

the structure is basically the same as that of embodiment 2, except that: the LED magnifier lens 103 is a PMMA lens with two magnifications, the transparent window 112 is made of PC doped with 2% by mass of micron silica particles, as shown in fig. 9, and the primary optical lens 504 of the LED light source 101 is a polyurethane lens with a microstructure array on the surface.

While the present invention has been described with reference to a few specific embodiments, it should be understood that the present invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein, but rather as encompassing various changes, modifications, substitutions and alterations without departing from the spirit and scope of the present invention.

Claims (7)

1. The utility model provides a no phosphor powder type LED magnifying glass, including the LED light source, a substrate, the magnifying glass lens, a battery, the control panel, touch-sensitive switch, the leaded light strip, leaded light strip sleeve pipe, frame before the shell, the shell back frame, light-transmitting window and tail stopper, the LED light source passes through the solder paste dress on the base plate, the both ends of LED light source pin respectively with the circuit fixed connection on the base plate, circuit on the base plate passes through the electric wire and is connected with the control panel, the control panel passes through the electric wire and battery, touch-sensitive switch links to each other, the control panel passes through the shell reference column and realizes spacing fixed, the light-transmitting window passes through the mutual gomphosis of draw-in groove and shell back frame, the magnifying glass lens is installed on the shell reservation position, the tail stopper, frame passes through mechanical system with the shell back frame before the shell and is connected, its characterized in that: the LED light source is high light efficiency yellow light LED chip, high light efficiency green glow LED chip, the white light LED light source of high light efficiency blue light LED chip and the synthetic golden yellow light LED light source of high light efficiency ruddiness LED chip or high light efficiency yellow light LED chip and the synthetic golden yellow light LED light source of high light efficiency ruddiness LED chip, the leaded light strip sleeve pipe is the tee bend form, install in the through-hole at both ends about the leaded light strip sleeve pipe at the both ends, the leaded light strip is fixed in the leaded light strip spacing groove department that frame and light-transmitting window reserved before the shell, the base plate is fixed in the intraductal downwardly opening's of leaded light strip sleeve pipe base plate spacing groove through mechanical connection's mode, the normal direction of LED light source light emitting area keeps unanimous with the axis direction of the sheathed tube through-hole of leaded light strip.

2. The phosphor-free LED magnifier according to claim 1, wherein: the white light LED light source is composed of 1-4 yellow light LED chips, 1-4 green light LED chips, 1-4 blue light LED chips and 1-4 red light LED chips; the golden yellow LED light source consists of 1-4 yellow LED chips and 1-4 red LED chips; the peak wavelength range of the yellow light LED chip is 550 nm-579 nm, the peak wavelength range of the green light LED chip is 510 nm-549 nm, the peak wavelength range of the blue light LED chip is 450 nm-479 nm, the peak wavelength range of the red light LED chip is 610 nm-650 nm, a plurality of LED chips are connected in series and driven by single constant current, or a plurality of LED chips are connected in parallel and driven by multi-path current.

3. The phosphor-free LED magnifier according to claim 1, wherein: the number of the LED light sources is 2, the LED light sources are connected in series, and the LED light sources are driven by single constant current; the two substrates are arranged back to back, the back surfaces of the two substrates are connected through heat-conducting silicone grease, and the substrates are ceramic substrates, aluminum substrates or copper substrates.

4. The phosphor-free LED magnifier according to claim 1, wherein: the shape of the magnifier lens is the same as that of the shell, and the magnifier lens is round or square, and has single magnification or two different magnifications.

5. The phosphor-free LED magnifier according to claim 1, wherein: the LED light source comprises a primary optical lens, and the appearance of the primary optical lens is one of a spherical cap, a free-form surface or a surface microstructure array.

6. The phosphor-free LED magnifier according to claim 1, wherein: the light guide strip structure is one of a core-spun structure or a scored structure; the nick structure is that the light guide strip surface has the nick of equidistant range.

7. The phosphor-free LED magnifier according to claim 1, wherein: the control panel is provided with a Micro-usb interface, the control panel is respectively connected with the positive electrode and the negative electrode of the battery and the positive electrode and the negative electrode on the substrate through wires, the inductive switch is connected with the control panel through a shielding wire, and the control panel is driven by a constant current; the touch inductive switch is fixed on the front frame of the shell through bonding glue.

Images